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The development of perineuronal nets around parvalbumin gabaergic neurons in the medial prefrontal cortex and basolateral amygdala of rats.
Behavioral Neuroscience ( IF 1.9 ) Pub Date : 2017-7-18 , DOI: 10.1037/bne0000203
Kathryn D Baker 1 , Arielle R Gray 1 , Rick Richardson 1
Affiliation  

Perineuronal nets (PNNs) are extracellular matrix structures that preferentially surround mature GABAergic neurons that express the calcium-binding protein parvalbumin (PV). It has been suggested that aberrant PNN formation in humans may contribute to psychological disorders, many of which emerge during childhood and adolescence. The present experiment investigated the normative developmental trajectory of PNN formation in the medial prefrontal cortex (mPFC) and basolateral amygdala (BLA) in juvenile (P24), adolescent (P35-36), and adult (∼P70) rats. Dual-immunofluorescence staining revealed that there was a marked increase in the number of PNNs in both the prelimbic and infralimbic regions of the mPFC across the transition from the juvenile to adolescent period. Although there were no differences in the number of PV neurons across age groups, adolescent and adult rats had more PNNs surrounding PV neurons than juveniles. In contrast to the mPFC, juvenile and adolescent rats had similar total numbers of PNNs in the BLA, and total numbers of PNNs were even higher in adults in this region. In the BLA, adults had more PNNs around non-PV cells whereas the number of PV cells with PNNs did not differ across ages. However, expression patterns differed within subregions of the BLA such that adults had the most PNNs around both PV and non-PV cells in the lateral nucleus, with no age differences observed in the basal nucleus. These findings demonstrate that the juvenile to adolescent developmental period is an important time for the formation of prefrontal PNNs and the maturation of PV inhibitory neurons. (PsycINFO Database Record

中文翻译:

大鼠前额内侧皮层和基底外侧杏仁核中小白蛋白加巴能神经元周围的神经周围网的发育。

神经周围神经网(PNN)是胞外基质结构,优先围绕表达钙结合蛋白小白蛋白(PV)的成熟GABA能神经元。有人认为,人体内异常PNN的形成可能导致心理障碍,其中许多是在儿童期和青春期出现的。本实验研究了幼年(P24),青春期(P35-36)和成年(〜P70)大鼠的内侧前额叶皮层(mPFC)和基底外侧杏仁核(BLA)中PNN形成的规范性发展轨迹。双重免疫荧光染色显示,从幼年期到青春期的过渡期间,mPFC的前缘和下缘区域的PNN数量均显着增加。尽管各个年龄段的PV神经元数量没有差异,青春期和成年大鼠的PV神经元周围的PNN数量多于青少年。与mPFC相比,未成年和青春期大鼠在BLA中的PNN总数相似,而该区域的成年人中PNN总数甚至更高。在BLA中,成年人的非PV细胞周围有更多的PNN,而带有PNN的PV细胞的数量随年龄的变化没有差异。但是,BLA子区域内的表达方式不同,因此成年人在外侧核的PV和非PV细胞周围都具有最多的PNN,而在基底核中未观察到年龄差异。这些发现表明,青少年到青春期的发育是额叶前额叶神经元形成和PV抑制神经元成熟的重要时期。(PsycINFO数据库记录 少年和青春期大鼠在BLA中的PNN总数相近,而该区域的成年人中PNN总数甚至更高。在BLA中,成年人的非PV细胞周围有更多的PNN,而带有PNN的PV细胞的数量随年龄的变化没有差异。但是,BLA子区域内的表达方式不同,因此成年人在外侧核的PV和非PV细胞周围都具有最多的PNN,而在基底核中未观察到年龄差异。这些发现表明,青少年到青春期的发育时期是额叶前额叶神经网络的形成和PV抑制神经元成熟的重要时期。(PsycINFO数据库记录 少年和青春期大鼠在BLA中的PNN总数相近,而该区域的成年人中PNN总数甚至更高。在BLA中,成年人的非PV细胞周围有更多的PNN,而具有PNN的PV细胞的数量随年龄的变化没有差异。但是,BLA子区域内的表达方式不同,因此成年人在外侧核的PV和非PV细胞周围都具有最多的PNN,而在基底核中未观察到年龄差异。这些发现表明,青少年到青春期的发育是额叶前额叶神经元形成和PV抑制神经元成熟的重要时期。(PsycINFO数据库记录 成年人在非PV细胞周围具有更多的PNN,而具有PNN的PV细胞的数量在不同年龄段之间没有差异。但是,BLA子区域内的表达方式不同,因此成年人在外侧核的PV和非PV细胞周围都具有最多的PNN,而在基底核中未观察到年龄差异。这些发现表明,青少年到青春期的发育是额叶前额叶神经网络的形成和PV抑制神经元成熟的重要时期。(PsycINFO数据库记录 成年人在非PV细胞周围具有更多的PNN,而具有PNN的PV细胞的数量在不同年龄段之间没有差异。但是,BLA子区域内的表达方式不同,因此成年人在外侧核的PV和非PV细胞周围都具有最多的PNN,而在基底核中未观察到年龄差异。这些发现表明,青少年到青春期的发育是额叶前额叶神经元形成和PV抑制神经元成熟的重要时期。(PsycINFO数据库记录 这些发现表明,青少年到青春期的发育时期是额叶前额叶神经网络的形成和PV抑制神经元成熟的重要时期。(PsycINFO数据库记录 这些发现表明,青少年到青春期的发育时期是额叶前额叶神经网络的形成和PV抑制神经元成熟的重要时期。(PsycINFO数据库记录
更新日期:2020-08-21
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