这种新药或有助于PTSD患者最终摆脱创伤

在一项新发现中，基础科学研究院（IBS）和梨花女子大学的科学家揭示了一种驱动PTSD的新大脑机制——以及一种可能抵消其影响的有前景的药物。

该团队由IBS认知与社会性研究中心的C. Justin LEE博士和梨花女子大学的LYOO In Kyoon教授领导，研究表明，由星形胶质细胞（大脑中的星形支持细胞）产生的过量GABA（γ-氨基丁酸）损害了大脑消除恐惧记忆的能力。这种缺陷是PTSD的一个核心特征，有助于解释为什么在威胁过去很久之后，创伤记忆仍然持续存在。

关键的是，研究人员发现一种名为KDS2010的脑渗透性药物可以选择性阻断负责这种异常GABA产生的单胺氧化酶B，从而逆转小鼠的类PTSD症状。该药物已通过人类一期安全性试验，使其成为未来PTSD治疗的有力候选药物。

PTSD仍然难以治疗，目前针对血清素通路的药物对许多患者的缓解作用有限。这项新研究聚焦于内侧前额叶皮层（mPFC），这是一个对调节恐惧至关重要的大脑区域，发现PTSD患者该区域的GABA水平异常高，且脑血流量减少。这些发现源于对380多名参与者的脑成像研究。重要的是，在表现出临床改善的患者中，GABA水平有所下降，表明该化学物质在康复中起着核心作用。

为了揭示这种过量GABA的来源，研究人员检查了死后的人脑组织，并使用了类PTSD小鼠模型。他们发现，是星形胶质细胞而非神经元，通过单胺氧化酶B（MAOB）产生了异常数量的GABA。这种星形胶质细胞来源的GABA损害了神经活动，阻断了大脑遗忘创伤记忆的能力。

当研究人员给予KDS2010（一种由IBS开发的高选择性、可逆性MAOB抑制剂）时，小鼠表现出正常化的大脑活动，并能够消除恐惧反应。该药物降低了GABA水平，恢复了mPFC中的血流量，并重新启用了记忆消除机制。因此，该研究证实星形胶质细胞MAOB是PTSD症状的核心驱动因素，而抑制MAOB是一条可行的治疗途径。

该研究的一个主要挑战是将人类的临床发现与实验室中的细胞机制联系起来。研究人员通过应用“逆向转化”策略解决了这个问题：他们从临床脑部扫描开始，回溯识别功能障碍的细胞来源，然后在动物模型中确认机制并测试药物效果。这种方法带来了对神经胶质细胞的新认识——长期以来被认为处于被动状态的它们——实际上在主动塑造精神症状。

 

* astrocyte-derived GABA: 星形胶质细胞来源的GABA (or $\gamma$-氨基丁酸). "GABA" is standard in Chinese scientific contexts, often kept as GABA or translated. I will use GABA for precision, or $\gamma$-氨基丁酸 if a more formal tone is needed. Usually, GABA is acceptable. * key pathological driver: 关键病理驱动因素. * fear extinction deficit: 恐惧消退缺陷. * PTSD (Post-Traumatic Stress Disorder): 创伤后应激障碍. * Dr. WON Woojin: Won Woojin博士 (Korean name, usually transliterated based on standard pronunciation or provided characters if known. Without specific characters, "Won Woojin" or "元宇镇" (common guess) might be used. However, in professional translation without the Hanja, we often keep the English name or use a standard transliteration. Let's stick to the English name or a close phonetic transcription if standard. Actually, looking up the context (Korean names in science), Won Woojin is likely "元宇镇" or similar, but to be safe and professional without external verification of the Hanja, I will use "Won Woojin博士". *Self-correction*: In Chinese scientific news, names are often transliterated. Let's check if there's a standard. If not, "Won Woojin博士" is safe. Let's try to find a standard transliteration for "Woojin". Usually "宇镇" or "佑真". But since I cannot be 100% sure of the Hanja, I will use "Won Woojin博士" to ensure accuracy, or transliterate phonetically like "温宇金" (less likely). Let's stick to "Won Woojin博士" or just translate the title. Actually, standard practice for unknown Hanja is often to keep the English name or use a phonetic translation. I will use "Won Woojin博士".) * postdoctoral researcher: 博士后研究员. * co-first author: 共同第一作者. * *Draft Translation:* 该研究的第一作者之一、博士后研究员Won Woojin博士表示：“这项研究首次证实了星形胶质细胞来源的GABA是PTSD中恐惧消退缺陷的关键病理驱动因素。” * *Refinement:* "Identify" here means identified/confirmed. "证实" or "鉴定" or "确定". "确定" or "鉴定" fits well. Let's use "确定". * *Source:* “Our findings not only uncover a novel astrocyte-based mechanism underlying PTSD, but also provide preclinical evidence for a new therapeutic approach using an MAOB inhibitor.” * *Key Terms:* * uncover: 揭示. * novel astrocyte-based mechanism: 新的基于星形胶质细胞的机制. * underlying PTSD: PTSD背后的 / 构成PTSD基础的. * preclinical evidence: 临床前证据. * therapeutic approach: 治疗方法. * MAOB inhibitor: MAOB抑制剂 (Monoamine oxidase B inhibitor - 单胺氧化酶B抑制剂). Usually "MAOB抑制剂" is fine. * *Draft Translation:* “我们的发现不仅揭示了PTSD背后一种新的基于星形胶质细胞的机制，而且为使用MAOB抑制剂的新疗法提供了临床前证据。” * **Paragraph 2:** * *Source:* Director C. Justin LEE, who led the study, emphasized that “This work represents a successful example of reverse translational research, where clinical findings in human guided the discovery of underlying mechanisms in animal models. * *Key Terms:* * Director C. Justin LEE: 主任C. Justin Lee (Korean name, likely Lee is 李. "C. Justin Lee" is the name used internationally. I will keep "C. Justin Lee" or translate Director as 主任/所长). * reverse translational research: 反向转化研究. * clinical findings in human: 人类临床发现. * guided: 指导/引导. * discovery of underlying mechanisms: 发现潜在机制/内在机制. * *Draft Translation:* 领导该研究的主任C. Justin Lee强调：“这项工作是反向转化研究的成功范例，即人类的临床发现指导了动物模型中潜在机制的发现。” * *Source:* By identifying astrocytic GABA as a pathological driver in PTSD and targeting it via MAOB inhibition, the study opens a completely new therapeutic paradigm not only for PTSD but also for other neuropsychiatric disorders such as panic disorder, depression, and schizophrenia.” * *Key Terms:* * astrocytic GABA: 星形胶质细胞GABA. * targeting it: 靶向它. * MAOB inhibition: MAOB抑制. * therapeutic paradigm: 治疗范式. * neuropsychiatric disorders: 神经精神疾病/障碍. * panic disorder: 惊恐障碍. * depression: 抑郁症. * schizophrenia: 精神分裂症. * *Draft Translation:* “通过确定星形胶质细胞GABA是PTSD的病理驱动因素并通过MAOB抑制对其进行靶向治疗，这项研究不仅为PTSD，也为惊恐障碍、抑郁症和精神分裂症等其他神经精神疾病开辟了一个全新的治疗范式。” * **Paragraph 3:** * *Source:* The researchers plan to further investigate astrocyte-targeted therapies for various neuropsychiatric disorders. * *Key Terms:* * astrocyte-targeted therapies: 星形胶质细胞靶向疗法. * *Draft Translation:* 研究人员计划进一步研究针对各种神经精神疾病的星形胶质细胞靶向疗法。 * *Source:* With KDS2010 currently undergoing Phase 2 clinical trials, this discovery may soon lead to new options for patients whose symptoms have not responded to conventional treatments. * *Key Terms:* * KDS2010: (Drug name, keep as is). * Phase 2 clinical trials: 二期临床试验. * new options: 新的选择. * symptoms have not responded to conventional treatments: 症状对常规治疗无反应/常规治疗无效. * *Draft Translation:* 随着KDS2010目前正在进行二期临床试验，这一发现可能很快为那些症状对常规治疗无反应的患者带来新的选择。 3. **Review and Polish:** * *Paragraph 1:* “这项研究首次确定星形胶质细胞来源的GABA是PTSD恐惧消退缺陷的关键病理驱动因素，”该研究的博士后研究员兼共同第一作者Won Woojin博士说。“我们的发现不仅揭示了PTSD背后一种新的基于星形胶质细胞的机制，而且为使用MAOB抑制剂的新疗法提供了临床前证据。” *Critique:* "Identify" -> "确定" or "鉴定". "鉴定" is very scientific. "确定" flows well. "PTSD恐惧消退缺陷" -> "PTSD中恐惧消退缺陷" (slightly better grammar). "MAOB inhibitor" -> "MAOB抑制剂". * *Paragraph 2:* 领导该研究的主任C. Justin Lee强调：“这项工作代表了反向转化研究的一个成功范例，即人类的临床发现指导了动物模型中潜在机制的发现。通过确定星形胶质细胞GABA是PTSD的病理驱动因素并通过MAOB抑制对其进行靶向干预，该研究不仅为PTSD，也为惊恐障碍、抑郁症和精神分裂症等其他神经精神疾病开辟了一个全新的治疗范式。” *Critique:* "Targeting it via MAOB inhibition" -> "通过MAOB抑制对其进行靶向干预" (intervention) or "靶向治疗" (treatment). "Targeting" usually implies the action of the drug. "靶向干预" sounds professional. "Therapeutic paradigm" -> "治疗范式". * *Paragraph 3:* 研究人员计划进一步研究针对各种神经精神疾病的星形胶质细胞靶向疗法。鉴于KDS2010目前正处于二期临床试验阶段，这一发现可能很快为那些对常规治疗无效的患者提供新的选择。 *Critique:* "With..." -> "鉴于..." or "随着...". "With" here implies concurrent timeline. "随着" is good. "Patients whose symptoms have not responded..." -> "对常规治疗无效的患者" is concise and standard medical Chinese. 4. **Final Polish (Merging and Formatting):** 该研究的博士后研究员兼共同第一作者Won Woojin博士表示：“这项研究首次确定星形胶质细胞来源的GABA是PTSD中恐惧消退缺陷的关键病理驱动因素