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细胞核因子-κB在睾丸生精细胞凋亡过程中的活化作用

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摘要 细胞凋亡在精子发生过程中限制睾丸生精细胞总数起着重要的作用,它的调控异常与男性不育密切相关。越来越多的证据显示细胞核因子-κB(nuclear factor kappa B,NF-κB)对睾丸生精细胞凋亡起着调控作用,这促使我们研究人类正常睾丸组织NF-κB的活性及在离体状态下睾丸组织过度凋亡过程中的作用。用电泳迁移率变更分析(EMSA)测定,发现低水平NF-κB组成性DNA结合活性,且通过对NF-κB的亚单位RelA和p50的免疫染色发现,NF-κB定位于Sertoli细胞核内。在体外诱导的睾丸凋亡过程中,Sertoli细胞(睾丸支持细胞)核NF-κB水平和整个生精小管NF-κB DNA结合活性的增加先于检测到发生凋亡的生精细胞。抗炎药物sulfasalazine可有效抑制应激诱导的NF-κB DNA结合力和NF-κB介导的IBa基因表达。更为重要的是,sulfasalazine抑制NF-κB的同时抑制生精细胞凋亡。因此,有可能通过药物抑制NF-κB,治疗短暂应激条件下引起的生精细胞的过度凋亡。
作者 刘辉 张彧
出处 《临床和实验医学杂志》 2008年第2期161-163,共3页 Journal of Clinical and Experimental Medicine
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