焦虑症是最常见的精神障碍，区别于生理性焦虑，患者常表现出持续的焦虑状态。越来越多证据表明，抑制性神经元参与生理性焦虑的产生和消退，而这类神经元功能异常与焦虑症的发生密切相关。小清蛋白（PV）神经元是一类主要的抑制性中间神经元，广泛分布于大脑皮质和其他脑区，并且具有独特形态和功能。PV神经元可通过快速放电活动精确控制局部微环路和大脑网络活动，进而调控焦虑发生。文章综述PV神经元如何介导生理性焦虑及其功能异常及如何导致焦虑症的产生，重点介绍了PV神经元的解剖和功能特性，这些特性使它们拥有快速和强力的抑制作用，能够快速调控神经网络活动，和PV神经元以及相关的神经环路调控焦虑发生的环路机制，以及PV神经元调控焦虑发生的分子机制，并展望未来的研究方向，以期为开发新的焦虑症干预策略提供科学依据。
Anxiety disorders，distinct from physiological anxiety，are characterized by a chronic and pervasive state of heightened anxiety and represent the most common mental diseases．Emerging evidence implicates inhibitory neurons in both the generation and extinction of physiological anxiety，with dysfunction in these neurons strongly associated with the pathogenesis of anxiety disorders．Among inhibitory neurons，parvalbumin（PV）-positive interneuron，a key subset with unique morphological and functional characteristics，are widely distributed across the cerebral cortex and various brain regions．These neurons exert rapid，potent inhibitory control over local microcircuits and broader neural networks through their fast-spiking activity，making them integral to the regulation of anxiety-related behaviors．This review highlights three key aspects：the anatomical and functional properties of PV neurons；their role in circuit mechanisms；the molecular pathways by which PV neurons regulate anxiety．By elucidating the role of PV neurons in modulating physiological anxiety and highlighting their dysfunction in anxiety disorders，this review aims to inform future research and foster the development of novel therapeutic interventions for anxiety disorders．
目的 针对目前常规使用的玻璃体腔注射针头容易引起注射后小鼠眼内出血和损伤晶状体的缺陷，本研究采用直径仅0.08 mm的玻璃毛细管作为实验用小鼠眼内注射针头进行玻璃体腔注射，并评估其安全性和可行性。方法 选取12只6-8周的C57BL/6J雄性小鼠，左眼注射磷酸盐缓冲液为实验组，右眼不做特殊处理为对照组。6只小鼠玻璃体腔注射后立即腹腔注射伊文思蓝，检测视网膜血管渗漏情况；另外6只小鼠玻璃体腔注射后24 h处死，视网膜铺片免疫荧光染色小胶质细胞特异性抗体抗离子钙接头蛋白1，分析小胶质细胞的形态变化。结果 实验组和对照组血管与周围荧光强度比值分别为（4.45±0.30）和（4.51±0.24），小胶质细胞数量分别为（131.00±5.38）个/mm2 和（133.00±5.99）个/mm2 ，小胶质细胞胞体面积分别为34.02（27.82，40.54）μm2 和34.70（26.09，40.54）μm2 ，小胶质细胞分支长度分别为198.80（171.30，258.80）μm和223.30（178.20，278.30）μm，两组相比差异均无统计学意义（均P＞0.05）。结论 经改良的玻璃毛细管直径更细，损伤更小，可以替代传统的注射针头，可作为实验用小鼠眼内注射针头进行玻璃体腔注射。
Objective To assess the safety and feasibility of employing an enhanced glass capillary，with a diameter of 0.08 mm，as an intraocular needle for intravitreal injections in experimental mice eyes．Methods Twelve male C57BL/6J mice，aged 6-8 weeks，were utilized in this investigation．Phosphate buffered saline（PBS）was administered via intravitreal injection into the left eye of each mouse（experimental group），while the right eye received no special treatment（control group）．Six mice received an intraperitoneal injection of Evans blue immediately following intravitreal injection to detect retinal vessel leakage．The remaining six mice were euthanized 24 hours after intravitreal injection，and the retinas were subjected to immunofluorescence staining using a microglia-specific antibody to analyze morphological changes in microglia．Results In both the experimental and control groups，the ratio of vascular to peripheral fluorescence intensity was（4.45±0.30）and（4.51±0.24），respectively．The number of microglia was（131.00±5.38）/mm2 and（133.00±5.99）/mm2 ，the cell body area of microglia was 34.02（27.82，40.54）μm2 and 34.70（26.09，40.54）μm2 ，and the branch length of microglia was 198.80（171.30，258.80）μm and 223.30（178.20，278.30）μm，respectively．There were no statistically differences observed in any of the above indicators between the two groups（all P＞0.05）．Conclusions The use of this glass capillary，characterized by a narrower diameter，reduces tissue damage，demonstrates its potential to replace traditional injection needles for performing intravitreal injections in experimental mice．
