卵巢上皮性肿瘤神经内分泌细胞增殖与凋亡研究

目的： 观察卵巢上皮性肿瘤组织中神经内分泌细胞（NECs）的形态特点及增殖与凋亡状况，以探讨其生物学及临床意义。 方法： 手术切除的卵巢上皮性肿瘤标本79例，其中良性20例，交界性18例，恶性41例，正常卵巢组织22例作对照，采用嗜铬素A（CgA）免疫组化染色显示NECs，并进行CgA/Ki67及TUNEL/CgA双重染色，观察NECs的增殖与凋亡状况。 结果： 卵巢上皮性肿瘤组织NECs的阳性率、分布范围及染色强度均高于正常卵巢组织。卵巢上皮性肿瘤中NECs形态多样，具有神经元样突起，延伸到毗邻细胞或基底膜，NECs之间亦有突起相互接触。双重免疫组化染色显示NECs均呈TUNEL染色阴性，部分细胞Ki67染色阳性。 结论： 卵巢上皮性肿瘤组织中NECs与肿瘤细胞一样可增殖，但不发生凋亡，其分泌产物可促进周围非NECs的增殖，抑制其凋亡。

Proliferation and apoptosis of neuroendocrine cells in ovarian epithelial tumors

AIM: The purpose of this study was to observe the morphological features of neuroendocrine cells(NECs),their proliferation and apoptosis in ovarian epithelial tumors,and to discuss their biological and clinical significance.METHODS: 79 specimens of ovarian epithelial tumor samples were collected,of them 20 benign,18 boderline,41 milignant tumors,and 22 normal ovaries were investigated immunohistochemically.Chromogranin A was used to detect NECs and their proliferation and apoptosis were examined by double-label staining of chromogranin A and Ki67 or TUNEL.RESULTS: The positive rate of CgA,distribution and staining intensity in ovarian epithelial tumors were higher than those in normal ovary.NECs showed various shapes with neuronoid protuberances stretching to the neighboring cells or basement membrane.Occasionally,they might touch together.No TUNEL positive coexpression in all NECs was observed by double-label staining,but some NECs were coexpressed with Ki67.CONCLUSION: NECs of ovarian epithelial tumors like cancer cells showed a proliferation,but no apoptosis.Their secretion might promote their neighboring non-NECs to proliferate and prevent them from apoptosis.