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L2086F - 版本历史
2026-04-19T04:00:14Z
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2026年1月25日 (日) 11:42 77921020
2026-01-25T11:42:56Z
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←上一版本</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">2026年1月25日 (日) 11:42的版本</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l3" >第3行：</td>
<td colspan="2" class="diff-lineno">第3行：</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <div style="margin-bottom: 30px; border-bottom: 1.2px solid #e2e8f0; padding-bottom: 25px;"></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <div style="margin-bottom: 30px; border-bottom: 1.2px solid #e2e8f0; padding-bottom: 25px;"></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <p style="font-size: 1.1em; margin: 10px 0; color: #334155; text-align: justify;"></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <p style="font-size: 1.1em; margin: 10px 0; color: #334155; text-align: justify;"></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <strong>L2086F</strong> 是 <strong>[[ROS1]]</strong> 基因酪氨酸激酶结构域中的一种错义突变，具体为第 2086 位的<strong>亮氨酸</strong>（Leu）被<strong>苯丙氨酸</strong>（Phe）取代。它是 ALK <del class="diffchange diffchange-inline">基因著名的“复敏突变”</del><strong>[[L1198F]]</strong> 在 ROS1 中的同源对应位点。尽管 L2086F 在临床样本中极为罕见，但在药物研发的晶体结构模拟和体外细胞实验中，它表现出了与 ALK L1198F 高度一致的特性：即通过引入苯环侧链导致大环类抑制剂（如<strong>[[洛拉替尼]]</strong>）产生空间位阻而耐药，但同时可能通过变构效应恢复对第一代药物<strong>[[克唑替尼]]</strong>的敏感性。这为 ROS1 阳性肺癌的耐药管理提供了潜在的“回用老药”理论依据。</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <strong>L2086F</strong> 是 <strong>[[ROS1]]</strong> 基因酪氨酸激酶结构域中的一种错义突变，具体为第 2086 位的<strong>亮氨酸</strong>（Leu）被<strong>苯丙氨酸</strong>（Phe）取代。它是 <ins class="diffchange diffchange-inline"><strong>[[</ins>ALK<ins class="diffchange diffchange-inline">]]</strong> 基因著名的“<strong>[[复敏突变]]</strong>” </ins><strong>[[L1198F]]</strong> 在 ROS1 中的同源对应位点。尽管 <ins class="diffchange diffchange-inline"><strong>[[</ins>L2086F<ins class="diffchange diffchange-inline">]]</strong> </ins>在临床样本中极为罕见，但在药物研发的晶体结构模拟和体外细胞实验中，它表现出了与 ALK <ins class="diffchange diffchange-inline"><strong>[[</ins>L1198F<ins class="diffchange diffchange-inline">]]</strong> </ins>高度一致的特性：即通过引入苯环侧链导致大环类抑制剂（如<strong>[[洛拉替尼]]</strong>）产生空间位阻而耐药，但同时可能通过变构效应恢复对第一代药物<strong>[[克唑替尼]]</strong>的敏感性。这为 ROS1 阳性肺癌的耐药管理提供了潜在的“回用老药”理论依据。</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </p></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </p></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l58" >第58行：</td>
<td colspan="2" class="diff-lineno">第58行：</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <p style="margin: 15px 0; text-align: justify;"></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <p style="margin: 15px 0; text-align: justify;"></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> ROS1 和 ALK 的激酶结构域具有高度的序列相似性（约 77%<del class="diffchange diffchange-inline">），这使得它们的耐药机制像镜子一样相互映照。L2086F </del>正是这种“镜像效应”的典型代表。</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <ins class="diffchange diffchange-inline"><strong>[[</ins>ROS1<ins class="diffchange diffchange-inline">]]</strong> </ins>和 <ins class="diffchange diffchange-inline"><strong>[[</ins>ALK<ins class="diffchange diffchange-inline">]]</strong> </ins>的激酶结构域具有高度的序列相似性（约 77%<ins class="diffchange diffchange-inline">），这使得它们的耐药机制像镜子一样相互映照。<strong>[[L2086F]]</strong> </ins>正是这种“镜像效应”的典型代表。</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </p></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </p></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l66" >第66行：</td>
<td colspan="2" class="diff-lineno">第66行：</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> L2086 位于 ATP 结合口袋的铰链区。当它突变为苯丙氨酸（Phe, F）时，引入了一个笨重的<strong>苯环</strong>侧链。</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> L2086 位于 ATP 结合口袋的铰链区。当它突变为苯丙氨酸（Phe, F）时，引入了一个笨重的<strong>苯环</strong>侧链。</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <br></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <br></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <strong>1. 阻挡洛拉替尼：</strong> <del class="diffchange diffchange-inline">苯环与洛拉替尼这种结构紧凑的大环分子发生空间碰撞，阻止其进入口袋。</del></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <strong>1. 阻挡洛拉替尼：</strong> <ins class="diffchange diffchange-inline">苯环与 <strong>[[洛拉替尼]]</strong> 这种结构紧凑的大环分子发生空间碰撞，阻止其进入口袋。</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <br></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <br></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <strong>2. 欢迎克唑替尼：</strong> 苯环通过疏水相互作用，可能微调了 P-loop <del class="diffchange diffchange-inline">或周围螺旋的构象，使得口袋的形状重新变得适合线性的第一代药物克唑替尼结合。</del></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <strong>2. 欢迎克唑替尼：</strong> 苯环通过疏水相互作用，可能微调了 P-loop <ins class="diffchange diffchange-inline">或周围螺旋的构象，使得口袋的形状重新变得适合线性的第一代药物 <strong>[[克唑替尼]]</strong> 结合。</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </p></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </p></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </div></div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l84" >第84行：</td>
<td colspan="2" class="diff-lineno">第84行：</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <tr></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <tr></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600; color: #1e40af;"><strong>复敏突变</strong></td></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600; color: #1e40af;"><strong>复敏突变</strong></td></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600; color: #166534;">L2086F</td></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600; color: #166534;"><ins class="diffchange diffchange-inline"><strong>[[</ins>L2086F<ins class="diffchange diffchange-inline">]]</strong></ins></td></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1;"><strong>L1198F</strong></td></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1;"><strong><ins class="diffchange diffchange-inline">[[</ins>L1198F<ins class="diffchange diffchange-inline">]]</ins></strong></td></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1; text-align: left; font-size: 0.85em;">可能导致洛拉替尼耐药，但恢复克唑替尼敏感性。</td></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1; text-align: left; font-size: 0.85em;">可能导致洛拉替尼耐药，但恢复克唑替尼敏感性。</td></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </tr></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </tr></div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l91" >第91行：</td>
<td colspan="2" class="diff-lineno">第91行：</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">溶剂前沿</td></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">溶剂前沿</td></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1;"><strong>[[G2032R]]</strong></td></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1;"><strong>[[G2032R]]</strong></td></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1;">G1202R</td></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1;"><ins class="diffchange diffchange-inline"><strong>[[</ins>G1202R<ins class="diffchange diffchange-inline">]]</strong></ins></td></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1; text-align: left; font-size: 0.85em;">最常见的顽固耐药突变。</td></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1; text-align: left; font-size: 0.85em;">最常见的顽固耐药突变。</td></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </tr></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </tr></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <tr></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <tr></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">守门员</td></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">守门员</td></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1;">L2026M</td></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1;"><ins class="diffchange diffchange-inline"><strong>[[</ins>L2026M<ins class="diffchange diffchange-inline">]]</strong></ins></td></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1;">L1196M</td></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1;"><ins class="diffchange diffchange-inline"><strong>[[</ins>L1196M<ins class="diffchange diffchange-inline">]]</strong></ins></td></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1; text-align: left; font-size: 0.85em;">一代药耐药，二代药敏感。</td></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1; text-align: left; font-size: 0.85em;">一代药耐药，二代药敏感。</td></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </tr></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </tr></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <tr></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <tr></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">构象突变</td></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">构象突变</td></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1;">S1986Y</td></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1;"><ins class="diffchange diffchange-inline"><strong>[[</ins>S1986Y<ins class="diffchange diffchange-inline">]]</strong></ins></td></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1;">C1156Y</td></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1;"><ins class="diffchange diffchange-inline"><strong>[[</ins>C1156Y<ins class="diffchange diffchange-inline">]]</strong></ins></td></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1; text-align: left; font-size: 0.85em;">常作为复合突变的“底色”。</td></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border: 1px solid #cbd5e1; text-align: left; font-size: 0.85em;">常作为复合突变的“底色”。</td></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </tr></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </tr></div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l111" >第111行：</td>
<td colspan="2" class="diff-lineno">第111行：</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <h2 style="background: #f1f5f9; color: #0f172a; padding: 10px 18px; border-radius: 0 6px 6px 0; font-size: 1.25em; margin-top: 40px; border-left: 6px solid #0f172a; font-weight: bold;">临床应用：理论照进现实？</h2></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <h2 style="background: #f1f5f9; color: #0f172a; padding: 10px 18px; border-radius: 0 6px 6px 0; font-size: 1.25em; margin-top: 40px; border-left: 6px solid #0f172a; font-weight: bold;">临床应用：理论照进现实？</h2></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <p style="margin: 15px 0; text-align: justify;"></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <p style="margin: 15px 0; text-align: justify;"></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> 目前关于 L2086F 的报道多集中于临床前研究和少量的病例报告，其临床指导意义主要体现在对未来的预判上。</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> 目前关于 <ins class="diffchange diffchange-inline"><strong>[[</ins>L2086F<ins class="diffchange diffchange-inline">]]</strong> </ins>的报道多集中于临床前研究和少量的病例报告，其临床指导意义主要体现在对未来的预判上。</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </p></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </p></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l121" >第121行：</td>
<td colspan="2" class="diff-lineno">第121行：</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </tr></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </tr></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <tr></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <tr></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border-bottom: 1px solid #e2e8f0; font-weight: bold;">患者出现 L2086F</td></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border-bottom: 1px solid #e2e8f0; font-weight: bold;">患者出现 <ins class="diffchange diffchange-inline">[[</ins>L2086F<ins class="diffchange diffchange-inline">]]</ins></td></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border-bottom: 1px solid #e2e8f0;"></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border-bottom: 1px solid #e2e8f0;"></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <del class="diffchange diffchange-inline">如果患者正在使用洛拉替尼且出现进展，通过 </del>NGS 发现 L2086F，可以考虑尝试<strong><del class="diffchange diffchange-inline">回用克唑替尼</del></strong>（Re-challenge），或者使用对空间位阻不敏感的<strong>[[卡博替尼]]</strong>（Cabozantinib）。</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <ins class="diffchange diffchange-inline">如果患者正在使用 <strong>[[洛拉替尼]]</strong> 且出现进展，通过 <strong>[[</ins>NGS<ins class="diffchange diffchange-inline">]]</strong> </ins>发现 L2086F，可以考虑尝试<strong><ins class="diffchange diffchange-inline">回用 [[克唑替尼]]</ins></strong>（Re-challenge），或者使用对空间位阻不敏感的<strong>[[卡博替尼]]</strong>（Cabozantinib）。</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </td></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </td></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </tr></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </tr></div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l129" >第129行：</td>
<td colspan="2" class="diff-lineno">第129行：</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border-bottom: 1px solid #e2e8f0; font-weight: bold;">复合突变风险</td></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border-bottom: 1px solid #e2e8f0; font-weight: bold;">复合突变风险</td></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border-bottom: 1px solid #e2e8f0;"></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> <td style="padding: 10px; border-bottom: 1px solid #e2e8f0;"></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> 类似于 ALK，L2086F 很可能与 S1986Y 等其他位点形成复合突变。这种情况下，单一药物可能无效，需要依赖新一代药物如<strong>[[瑞波替尼]]</strong>。</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> 类似于 ALK，L2086F 很可能与 <ins class="diffchange diffchange-inline"><strong>[[</ins>S1986Y<ins class="diffchange diffchange-inline">]]</strong> </ins>等其他位点形成复合突变。这种情况下，单一药物可能无效，需要依赖新一代药物如<strong>[[瑞波替尼]]</strong>。</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </td></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </td></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </tr></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> </tr></div></td></tr>
</table>
77921020
https://www.yiliao.com/index.php?title=L2086F&diff=315649&oldid=prev
77921020：建立内容为“<div style="padding: 0 4%; line-height: 1.8; color: #1e293b; font-family: 'Helvetica Neue', Helvetica, 'PingFang SC', Arial, sans-serif; background-color: #ffffff…”的新页面
2026-01-25T11:15:02Z
<p>建立内容为“<div style="padding: 0 4%; line-height: 1.8; color: #1e293b; font-family: 'Helvetica Neue', Helvetica, 'PingFang SC', Arial, sans-serif; background-color: #ffffff…”的新页面</p>
<p><b>新页面</b></p><div><div style="padding: 0 4%; line-height: 1.8; color: #1e293b; font-family: 'Helvetica Neue', Helvetica, 'PingFang SC', Arial, sans-serif; background-color: #ffffff; max-width: 1200px; margin: auto;"><br />
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<strong>L2086F</strong> 是 <strong>[[ROS1]]</strong> 基因酪氨酸激酶结构域中的一种错义突变，具体为第 2086 位的<strong>亮氨酸</strong>（Leu）被<strong>苯丙氨酸</strong>（Phe）取代。它是 ALK 基因著名的“复敏突变”<strong>[[L1198F]]</strong> 在 ROS1 中的同源对应位点。尽管 L2086F 在临床样本中极为罕见，但在药物研发的晶体结构模拟和体外细胞实验中，它表现出了与 ALK L1198F 高度一致的特性：即通过引入苯环侧链导致大环类抑制剂（如<strong>[[洛拉替尼]]</strong>）产生空间位阻而耐药，但同时可能通过变构效应恢复对第一代药物<strong>[[克唑替尼]]</strong>的敏感性。这为 ROS1 阳性肺癌的耐药管理提供了潜在的“回用老药”理论依据。<br />
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<div style="font-size: 1.2em; font-weight: bold; letter-spacing: 1.2px;">ROS1 L2086F</div><br />
<div style="font-size: 0.7em; opacity: 0.85; margin-top: 4px; white-space: nowrap;">Potential Resensitizing Mutation (点击展开)</div><br />
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[[Image:ROS1_L2086F_structural_homology_to_ALK_L1198F.png|100px|ROS1 与 ALK 的同源结构对比]]<br />
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<div style="font-size: 0.8em; color: #64748b; margin-top: 12px; font-weight: 600;">ALK L1198F 的孪生兄弟</div><br />
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<table style="width: 100%; border-spacing: 0; border-collapse: collapse; font-size: 0.85em;"><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f1f5f9; color: #475569; border-bottom: 1px solid #e2e8f0; width: 40%;">涉及基因</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;"><strong>[[ROS1]]</strong> (Kinase Domain)</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f1f5f9; color: #475569; border-bottom: 1px solid #e2e8f0;">氨基酸改变</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #1e40af;">Leu2086 → Phe</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f1f5f9; color: #475569; border-bottom: 1px solid #e2e8f0;">ALK 对应位点</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #b91c1c;"><strong>[[L1198F]]</strong></td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f1f5f9; color: #475569; border-bottom: 1px solid #e2e8f0;">耐药药物</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #b91c1c;"><strong>[[洛拉替尼]]</strong> (预测)</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f1f5f9; color: #475569; border-bottom: 1px solid #e2e8f0;">潜在敏感药</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #166534;"><strong>[[克唑替尼]]</strong> (复敏)</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f1f5f9; color: #475569; border-bottom: 1px solid #e2e8f0;">临床频率</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">极罕见 / 理论推测</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f1f5f9; color: #475569;">突变机制</th><br />
<td style="padding: 6px 12px; color: #0f172a;">空间位阻 + 构象重塑</td><br />
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<h2 style="background: #f1f5f9; color: #0f172a; padding: 10px 18px; border-radius: 0 6px 6px 0; font-size: 1.25em; margin-top: 40px; border-left: 6px solid #0f172a; font-weight: bold;">分子同源性：为什么它是特殊的？</h2><br />
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<p style="margin: 15px 0; text-align: justify;"><br />
ROS1 和 ALK 的激酶结构域具有高度的序列相似性（约 77%），这使得它们的耐药机制像镜子一样相互映照。L2086F 正是这种“镜像效应”的典型代表。<br />
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<h3 style="margin-top: 0; color: #be123c; font-size: 1.1em;">结构上的“双刃剑”</h3><br />
<p style="margin-bottom: 0; text-align: justify; font-size: 0.95em; color: #334155;"><br />
L2086 位于 ATP 结合口袋的铰链区。当它突变为苯丙氨酸（Phe, F）时，引入了一个笨重的<strong>苯环</strong>侧链。<br />
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<strong>1. 阻挡洛拉替尼：</strong> 苯环与洛拉替尼这种结构紧凑的大环分子发生空间碰撞，阻止其进入口袋。<br />
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<strong>2. 欢迎克唑替尼：</strong> 苯环通过疏水相互作用，可能微调了 P-loop 或周围螺旋的构象，使得口袋的形状重新变得适合线性的第一代药物克唑替尼结合。<br />
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<h2 style="background: #fff1f2; color: #9f1239; padding: 10px 18px; border-radius: 0 6px 6px 0; font-size: 1.25em; margin-top: 40px; border-left: 6px solid #9f1239; font-weight: bold;">ROS1 与 ALK 关键位点对照表</h2><br />
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<th style="padding: 12px; border: 1px solid #cbd5e1; border-bottom: 2px solid #60a5fa; width: 25%;">功能分类</th><br />
<th style="padding: 12px; border: 1px solid #cbd5e1; border-bottom: 2px solid #60a5fa; width: 25%;">ROS1 位点</th><br />
<th style="padding: 12px; border: 1px solid #cbd5e1; border-bottom: 2px solid #60a5fa; width: 25%;">ALK 位点</th><br />
<th style="padding: 12px; border: 1px solid #cbd5e1; border-bottom: 2px solid #60a5fa; width: 25%;">临床意义</th><br />
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<td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600; color: #1e40af;"><strong>复敏突变</strong></td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600; color: #166534;">L2086F</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;"><strong>L1198F</strong></td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1; text-align: left; font-size: 0.85em;">可能导致洛拉替尼耐药，但恢复克唑替尼敏感性。</td><br />
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<td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">溶剂前沿</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;"><strong>[[G2032R]]</strong></td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;">G1202R</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1; text-align: left; font-size: 0.85em;">最常见的顽固耐药突变。</td><br />
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<td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">守门员</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;">L2026M</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;">L1196M</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1; text-align: left; font-size: 0.85em;">一代药耐药，二代药敏感。</td><br />
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<td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">构象突变</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;">S1986Y</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;">C1156Y</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1; text-align: left; font-size: 0.85em;">常作为复合突变的“底色”。</td><br />
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<h2 style="background: #f1f5f9; color: #0f172a; padding: 10px 18px; border-radius: 0 6px 6px 0; font-size: 1.25em; margin-top: 40px; border-left: 6px solid #0f172a; font-weight: bold;">临床应用：理论照进现实？</h2><br />
<p style="margin: 15px 0; text-align: justify;"><br />
目前关于 L2086F 的报道多集中于临床前研究和少量的病例报告，其临床指导意义主要体现在对未来的预判上。<br />
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<table style="width: 100%; border-collapse: collapse; border: 1.2px solid #cbd5e1; font-size: 0.9em; text-align: left;"><br />
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<th style="padding: 10px; width: 30%;">情境假设</th><br />
<th style="padding: 10px; width: 70%;">潜在治疗策略</th><br />
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<td style="padding: 10px; border-bottom: 1px solid #e2e8f0; font-weight: bold;">患者出现 L2086F</td><br />
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如果患者正在使用洛拉替尼且出现进展，通过 NGS 发现 L2086F，可以考虑尝试<strong>回用克唑替尼</strong>（Re-challenge），或者使用对空间位阻不敏感的<strong>[[卡博替尼]]</strong>（Cabozantinib）。<br />
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<td style="padding: 10px; border-bottom: 1px solid #e2e8f0; font-weight: bold;">复合突变风险</td><br />
<td style="padding: 10px; border-bottom: 1px solid #e2e8f0;"><br />
类似于 ALK，L2086F 很可能与 S1986Y 等其他位点形成复合突变。这种情况下，单一药物可能无效，需要依赖新一代药物如<strong>[[瑞波替尼]]</strong>。<br />
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<span style="color: #0f172a; font-weight: bold; font-size: 1.05em; display: inline-block; margin-bottom: 15px;">学术参考文献与权威点评</span><br />
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[1] <strong>Shaw AT, et al. (2016).</strong> <em>Resensitization to Crizotinib by the Lorlatinib ALK Resistance Mutation L1198F.</em> <strong>[[New England Journal of Medicine]]</strong>.<br><br />
<span style="color: #475569;">[理论基石]：虽然是 ALK 的研究，但由于 ROS1 与 ALK 的高度同源性，这篇文献是理解 L2086F 功能的基础。</span><br />
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<p style="margin: 12px 0; border-bottom: 1px solid #e2e8f0; padding-bottom: 10px;"><br />
[2] <strong>Davare MA, et al. (2015).</strong> <em>Structural insight into selectivity and resistance profiles of ROS1 inhibitors.</em> <strong>[[PNAS]]</strong>.<br><br />
<span style="color: #475569;">[结构预测]：通过晶体结构分析，预测了 ROS1 激酶域中各个关键位点突变对不同抑制剂结合的影响，包括 L2086 位点。</span><br />
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<p style="margin: 12px 0; border-bottom: 1px solid #e2e8f0; padding-bottom: 10px;"><br />
[3] <strong>Lin JJ, et al. (2020).</strong> <em>Spectrum of Mechanisms of Resistance to Crizotinib and Lorlatinib in ROS1+ Lung Cancer.</em> <strong>[[Clinical Cancer Research]]</strong>.<br><br />
<span style="color: #475569;">[临床数据]：虽然目前尚未在临床大规模队列中高频观察到 L2086F，但该研究强调了 ROS1 耐药机制的多样性和进行 NGS 监测的必要性。</span><br />
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<div style="background-color: #eff6ff; color: #1e40af; padding: 8px 15px; font-weight: bold; text-align: center; border-bottom: 1px solid #dbeafe;"><br />
L2086F · 知识图谱<br />
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<td style="width: 85px; background-color: #f8fafc; color: #334155; font-weight: 600; padding: 10px 12px; text-align: right; vertical-align: middle; white-space: nowrap;">ALK 对应</td><br />
<td style="padding: 10px 15px; color: #334155;"><strong>[[L1198F]]</strong> (高度同源)</td><br />
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<tr style="border-bottom: 1px solid #f1f5f9;"><br />
<td style="width: 85px; background-color: #f8fafc; color: #334155; font-weight: 600; padding: 10px 12px; text-align: right; vertical-align: middle; white-space: nowrap;">突变性质</td><br />
<td style="padding: 10px 15px; color: #334155;"><strong>[[复敏突变]]</strong> (Resensitizing) • 理论性突变</td><br />
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<td style="width: 85px; background-color: #f8fafc; color: #334155; font-weight: 600; padding: 10px 12px; text-align: right; vertical-align: middle; white-space: nowrap;">耐药药物</td><br />
<td style="padding: 10px 15px; color: #334155;"><strong>[[洛拉替尼]]</strong> (可能)</td><br />
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<td style="width: 85px; background-color: #f8fafc; color: #334155; font-weight: 600; padding: 10px 12px; text-align: right; vertical-align: middle; white-space: nowrap;">回用药物</td><br />
<td style="padding: 10px 15px; color: #334155;"><strong>[[克唑替尼]]</strong> (Crizotinib)</td><br />
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77921020