人类太平洋小体的细胞学:中央轴突发芽的证据。

C Ide, T Nitatori, B L Munger
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引用次数: 34

摘要

在对正常成人非创伤帕西尼亚小体的研究过程中,我们经常在光镜和电镜下发现具有“明显多”神经支配的小体。在光镜和电子显微镜下仔细检查连续切片,发现这些“明显多”轴突终端实际上是小体内核内主要中央轴突的分支。萌芽发生在主干或主轴突的末端,这些萌芽从中央轴突向各个方向延伸,贯穿内核,产生这种“多重”神经支配的曲折和复杂的模式。这些轴突芽没有彼此分离的独立内核,而是嵌在一个共同的内核中。因此,共同内核的存在将正常的轴突芽与实验或病理产生的多神经支配区分开来,多神经支配是在先前失神经支配的小体中轴突再生的结果。我们认为太平洋小体的内核是一个独特的微环境,促进了正常成人和青少年太平洋小体的感觉轴突萌发。
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The cytology of human Pacinian corpuscles: evidence for sprouting of the central axon.

During the course of the studies on non-traumatized Pacinian corpuscles from normal human adults, we have frequently encountered corpuscles which have an 'apparently multiple' innervation in both light and electron microscopic preparations. On closer inspection of serial sections for both light and electron microscopy, these 'apparently multiple' axon terminals have been found in fact to be branches of the main central axon within the inner core of the corpuscle. Sprouting occurred at the trunk or at the extreme tip of the main axon, and such sprouts extended in various directions from the central axon throughout the inner core, producing tortuous and complex patterns of this 'multiple' innervation. These axonal sprouts do not have separate inner cores separated from one another, but rather are embedded in a common inner core. The presence of a common inner core thus differentiates normal axonal sprouts from the experimentally or pathologically produced multiple innervation that results form regeneration of axons in a previously denervated corpuscle. We conclude that the inner core of Pacinian corpuscles is a unique micro-environment promoting sprouting of sensory axon in the normal human adult as well as juvenile Pacinian corpuscles.

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