EC50 - 版本历史

https://www.yiliao.com/index.php?action=history&feed=atom&title=EC50 EC50 - 版本历史 2026-04-09T20:51:48Z 本wiki的该页面的版本历史 MediaWiki 1.35.1 https://www.yiliao.com/index.php?title=EC50&diff=316267&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 2026-02-03T09:46:38Z

<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 /> <br /> <div style="margin-bottom: 30px; border-bottom: 1.2px solid #e2e8f0; padding-bottom: 25px;"><br /> <p style="font-size: 1.1em; margin: 10px 0; color: #334155; text-align: justify;"><br /> <strong>EC<sub>50</sub></strong>（Half Maximal Effective Concentration，半最大效应浓度）是 <strong>[[Pharmacodynamics]] (药效学)</strong> 中用于衡量药物<strong>[[Potency]] (效价强度)</strong> 的核心指标。它指的是能引起 50% <strong>[[Emax]] (最大效应)</strong> 时所需的药物浓度（通常为摩尔浓度）。EC<sub>50</sub> 与药物的效价呈<strong>反比关系</strong>：EC<sub>50</sub> 数值越小，说明达到同等效应所需的药物浓度越低，即药物的效价越高。它是绘制 <strong>[[Dose-Response Curve]] (量效曲线)</strong> 时的关键参数，常用于比较不同激动剂（Agonist）对同一受体的亲和力与活性。<br /> </p><br /> </div><br /> <br /> <div class="medical-infobox mw-collapsible mw-collapsed" style="width: 100%; max-width: 320px; margin: 0 auto 35px auto; border: 1.2px solid #bae6fd; border-radius: 12px; background-color: #ffffff; box-shadow: 0 8px 20px rgba(0,0,0,0.05); overflow: hidden;"><br /> <br /> <div style="padding: 15px; color: #1e40af; background: linear-gradient(135deg, #e0f2fe 0%, #bae6fd 100%); text-align: center; cursor: pointer;"><br /> <div style="font-size: 1.2em; font-weight: bold; letter-spacing: 1.2px;">EC<sub>50</sub></div><br /> <div style="font-size: 0.7em; opacity: 0.85; margin-top: 4px; white-space: nowrap;">Potency Indicator (点击展开)</div><br /> </div><br /> <br /> <div class="mw-collapsible-content"><br /> <div style="padding: 25px; text-align: center; background-color: #f8fafc;"><br /> <div style="width: 100px; height: 100px; background-color: #e2e8f0; border-radius: 50%; margin: 0 auto; display: flex; align-items: center; justify-content: center; color: #94a3b8; font-size: 0.8em;"><br /> <br /> </div><br /> <div style="font-size: 0.8em; color: #64748b; margin-top: 12px; font-weight: 600;">S型曲线的中心点</div><br /> </div><br /> <br /> <table style="width: 100%; border-spacing: 0; border-collapse: collapse; font-size: 0.85em;"><br /> <tr><br /> <th colspan="2" style="padding: 8px 12px; background-color: #e0f2fe; color: #1e40af; text-align: left; font-size: 0.9em; border-top: 1px solid #bae6fd;">参数属性</th><br /> </tr><br /> <tr><br /> <th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0; width: 40%;">全称</th><br /> <td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">Half maximal effective concentration</td><br /> </tr><br /> <tr><br /> <th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">所属学科</th><br /> <td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #1e40af;">[[Pharmacodynamics]]</td><br /> </tr><br /> <tr><br /> <th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">常用单位</th><br /> <td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">Molar (nM, &#181;M)</td><br /> </tr><br /> <tr><br /> <th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">衡量指标</th><br /> <td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #16a34a;">[[Potency]] (效价)</td><br /> </tr><br /> <tr><br /> <th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">曲线特征</th><br /> <td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">拐点 (Inflection Point)</td><br /> </tr><br /> <br /> <tr><br /> <th colspan="2" style="padding: 8px 12px; background-color: #e0f2fe; color: #1e40af; text-align: left; font-size: 0.9em; border-top: 1px solid #bae6fd;">相关概念</th><br /> </tr><br /> <tr><br /> <th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">抑制剂对应</th><br /> <td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #e11d48;">[[IC50]]</td><br /> </tr><br /> <tr><br /> <th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">活体对应</th><br /> <td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">[[ED50]] (剂量)</td><br /> </tr><br /> <tr><br /> <th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">结合常数</th><br /> <td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">[[Kd]]</td><br /> </tr><br /> <tr><br /> <th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569;">数学模型</th><br /> <td style="padding: 6px 12px; color: #1e40af;">[[Hill Equation]]</td><br /> </tr><br /> </table><br /> </div><br /> </div><br /> <br /> <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;">定义解析：效价的标尺</h2><br /> <br /> <p style="margin: 15px 0; text-align: justify;"><br /> 在药理学实验中，当药物浓度以对数标度 (Log scale) 作图时，量效曲线通常呈现“S”形 (Sigmoidal)。EC<sub>50</sub> 位于这条曲线最陡峭部分的中心点。<br /> </p><br /> <br /> <br /> <br /> <div style="background-color: #f0f9ff; border-left: 5px solid #1e40af; padding: 15px 20px; margin: 20px 0; border-radius: 4px;"><br /> <h3 style="margin-top: 0; color: #1e40af; font-size: 1.1em;">越低越强 (Lower is Better)</h3><br /> <p style="margin-bottom: 0; text-align: justify; font-size: 0.9em; color: #334155;"><br /> EC<sub>50</sub> 与效价 (Potency) 成反比。<br /> <br>● <strong>药物 A (EC<sub>50</sub> = 1 nM)</strong> 比 <strong>药物 B (EC<sub>50</sub> = 100 nM)</strong> 效价高 100 倍。<br /> <br>这意味着达到同样的治疗效果，药物 A 仅需药物 B 百分之一的浓度。<br /> </p><br /> </div><br /> <br /> <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;">数学模型：Hill 方程</h2><br /> <br /> <p style="margin: 15px 0; text-align: justify;"><br /> EC<sub>50</sub> 是经典的 <strong>Hill 方程</strong> 中的核心参数，该方程描述了药物浓度 (<i>C</i>) 与效应 (<i>E</i>) 之间的定量关系：<br /> </p><br /> <br /> <div style="text-align: center; margin: 20px 0; padding: 15px; background: #fff; border: 1px solid #e2e8f0; border-radius: 8px; font-family: 'Courier New', monospace; font-size: 1.1em; color: #1e40af; font-weight: bold;"><br /> E = (E<sub>max</sub> × C<sup>n</sup>) / (EC<sub>50</sub><sup>n</sup> + C<sup>n</sup>)<br /> </div><br /> <br /> <ul style="padding-left: 25px; color: #334155; margin-top: 15px;"><br /> <li style="margin-bottom: 8px;"><strong>E<sub>max</sub>：</strong> 最大效应（效能）。</li><br /> <li style="margin-bottom: 8px;"><strong>EC<sub>50</sub>：</strong> 引起 50% E<sub>max</sub> 的浓度。</li><br /> <li style="margin-bottom: 8px;"><strong>n (Hill Coefficient)：</strong> 希尔系数，反映曲线的斜率或药物与受体结合的协同性。</li><br /> </ul><br /> <br /> <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;">概念辨析：EC50 vs. IC50 vs. ED50</h2><br /> <br /> <p style="margin: 15px 0; text-align: justify;"><br /> 药理学中有多个带“50”后缀的参数，它们极易混淆，但应用场景截然不同：<br /> </p><br /> <br /> <div style="overflow-x: auto; margin: 20px auto;"><br /> <table style="width: 100%; border-collapse: collapse; border: 1.2px solid #cbd5e1; font-size: 0.9em; text-align: left;"><br /> <tr style="background-color: #f1f5f9; border-bottom: 2px solid #0f172a;"><br /> <th style="padding: 12px; border: 1px solid #cbd5e1; color: #0f172a; width: 15%;">参数</th><br /> <th style="padding: 12px; border: 1px solid #cbd5e1; color: #1e40af; width: 25%;">全称</th><br /> <th style="padding: 12px; border: 1px solid #cbd5e1; color: #475569; width: 60%;">定义与用途</th><br /> </tr><br /> <tr><br /> <td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;"><strong>EC<sub>50</sub></strong></td><br /> <td style="padding: 10px; border: 1px solid #cbd5e1;">Effective Conc.</td><br /> <td style="padding: 10px; border: 1px solid #cbd5e1;"><strong>激动剂</strong>的半最大效应浓度。用于体外实验 (In Vitro)。</td><br /> </tr><br /> <tr><br /> <td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;"><strong>[[IC50]]</strong></td><br /> <td style="padding: 10px; border: 1px solid #cbd5e1;">Inhibitory Conc.</td><br /> <td style="padding: 10px; border: 1px solid #cbd5e1;"><strong>拮抗剂</strong>的半最大抑制浓度。用于衡量阻断剂或抑制剂的效能。</td><br /> </tr><br /> <tr><br /> <td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;"><strong>[[ED50]]</strong></td><br /> <td style="padding: 10px; border: 1px solid #cbd5e1;">Effective Dose</td><br /> <td style="padding: 10px; border: 1px solid #cbd5e1;">半数有效<strong>剂量</strong> (如 mg/kg)。用于动物或人体实验 (In Vivo)，指让 50% 个体产生效应的剂量。</td><br /> </tr><br /> </table><br /> </div><br /> <br /> <div style="font-size: 0.92em; line-height: 1.6; color: #1e293b; margin-top: 50px; border-top: 2px solid #0f172a; padding: 15px 25px; background-color: #f8fafc; border-radius: 0 0 10px 10px;"><br /> <span style="color: #0f172a; font-weight: bold; font-size: 1.05em; display: inline-block; margin-bottom: 15px;">学术参考文献 [Academic Review]</span><br /> <br /> <p style="margin: 12px 0; border-bottom: 1px solid #e2e8f0; padding-bottom: 10px;"><br /> [1] <strong>Neubig RR, et al. (2003).</strong> <em>International Union of Pharmacology Committee on Receptor Nomenclature and Drug Classification. XXXVIII. Update on terms and symbols in quantitative pharmacology.</em> <strong>[[Pharmacological Reviews]]</strong>. <br><br /> <span style="color: #475569;">[点评]：IUPHAR 发布的权威指南，标准化了 EC<sub>50</sub>、IC<sub>50</sub> 等术语的定义，是药理学界的命名法典。</span><br /> </p><br /> <br /> <p style="margin: 12px 0; border-bottom: 1px solid #e2e8f0; padding-bottom: 10px;"><br /> [2] <strong>Holford NH, Sheiner LB. (1981).</strong> <em>Understanding the dose-effect relationship: clinical application of pharmacokinetic-pharmacodynamic models.</em> <strong>[[Clinical Pharmacokinetics]]</strong>. <br><br /> <span style="color: #475569;">[点评]：经典文献，阐述了如何利用 EC<sub>50</sub> 参数将 PK 与 PD 联系起来，以优化临床给药方案。</span><br /> </p><br /> <br /> <p style="margin: 12px 0;"><br /> [3] <strong>Kenakin T. (2014).</strong> <em>A Pharmacology Primer: Theory, Applications, and Methods.</em> <strong>[[Elsevier]]</strong>. <br><br /> <span style="color: #475569;">[点评]：药理学经典教材，详细推导了 Hill 方程，并解释了 Potency 和 Efficacy 在药物筛选中的区别。</span><br /> </p><br /> </div><br /> <br /> <div style="margin: 40px 0; border: 1px solid #e2e8f0; border-radius: 8px; overflow: hidden; font-family: 'Helvetica Neue', Arial, sans-serif; font-size: 0.9em;"><br /> <div style="background-color: #eff6ff; color: #1e40af; padding: 8px 15px; font-weight: bold; text-align: center; border-bottom: 1px solid #dbeafe;"><br /> 药效学参数 · 知识图谱<br /> </div><br /> <table style="width: 100%; border-collapse: collapse; background-color: #ffffff;"><br /> <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;">上级概念</td><br /> <td style="padding: 10px 15px; color: #334155;">[[Pharmacodynamics]] • [[Dose-Response Relationship]]</td><br /> </tr><br /> <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;">平行指标</td><br /> <td style="padding: 10px 15px; color: #334155;">[[IC50]] (抑制) • [[ED50]] (剂量) • [[Kd]] (亲和力)</td><br /> </tr><br /> <tr><br /> <td style="width: 85px; background-color: #f8fafc; color: #334155; font-weight: 600; padding: 10px 12px; text-align: right; vertical-align: middle;">核心应用</td><br /> <td style="padding: 10px 15px; color: #334155;">[[Potency]] (效价) • [[Efficacy]] (效能) • [[Drug Screening]]</td><br /> </tr><br /> </table><br /> </div><br /> <br /> </div></div>

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