摘要
目的 观察人胎海马结构小白蛋白 (PV)免疫反应性神经元的分布。 方法 取孕龄为 30周的人胎尸体 ,用ABC免疫细胞化学方法显示PV免疫反应性神经元。 结果 海马结构的各区域内均有丰富的PV免疫反应性神经元分布 ,以锥体细胞层最为密集。CA1、CA2、CA3始层PV免疫反应性神经元呈散在分布 ,胞体较小 ,多为三角形或梭形 ,细胞突起 2～ 3个 ,锥体细胞层PV免疫反应性神经元数量最多 ,分布密集 ,细胞形态多样 ,细胞的突起伸向浅层的始层和深层的分子层 ;分子层PV免疫反应性神经元较稀少。门区PV免疫反应性神经元分布密集 ,但细胞分层不明显 ,可见部分细胞的突起伸向齿状回 ;齿状回PV免疫反应性神经元集中分布于颗粒细胞层 ,其余各层有少量散在的PV免疫反应性神经元 ,细胞染色浅淡 ,无明显突起。下托复合体PV免疫反应性神经元主要分布于锥体细胞层 ,始层和分子层较稀少 ,细胞淡染 ,突起不明显。 结论 海马结构的各区域均有丰富的PV免疫反应性神经元分布 ,主要分布于锥体细胞层和齿状回的颗粒层。各区域PV免疫反应性神经元发育成熟的时间可能并不同步 ,CA1～
Objective To observe the distribution of parvalbumin immunoreactive neurons in the hippocampal formation of human fetuses. Methods The distribution of parvalbumin immunoreactive neurons in the hippocampal formation of human fetuses at 30 week were investigated by ABC immunocytochemical technique. Results The abundant parvalbumin immunoreactive neurons were localized in all regions of hippocampal formation, especially in the stratum pyramidale. In the stratum oriens of CA1\|3, the triangle or shuttle parvalbumin immunoreactive neurons with some processes were smaller and scattered in this layer. In the stratum pyramidale, the parvalbumin immunoreactive neurons distributed densely, and the processes run out to the stratum oriens and stratum moleculare. In the stratum moleculare the parvalbumin immunoreactive neurons were sparser than in the stratum oriens and stratum moleculare. The parvalbumin immunoreactive neurons in hilus were denser in the hippocampal formation, compared with the other regions, however, delamination of them was not distinct. The processes of parvalbumin immunoreactive neurons run out to the dentate gyrus. The parvalbumin immunoreactive neurons in the dentate gyrus were mainly localized in the stratum granule. Few immunoreactive neurons distributed in the other layers, which were lightly stained and with no processes. In the subicular complex, the lightly stained neurons with few processes were mainly localized in the stratum pyramidale. Conclusion The abundant parvalbumin immunoreactive neurons presented in all regions of the hippocampal formation, especially in the stratum pyramidale. However, the ripe time of these neurons might be different, neurons in CA3 and hilus were earlier than in the dentate gyrus and subicular complex.
出处
《解剖学报》
CAS
CSCD
北大核心
2001年第4期317-319,T006,共4页
Acta Anatomica Sinica
基金
广东省医学科研基金资助项目 (A19982 90
A19992 81)
