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- 2015
腮腺主导管结扎及再通后腺泡凋亡与再生变化规律的研究
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Abstract:
摘要 目的:研究大鼠腮腺主导管结扎及再通后腺泡凋亡与再生的变化规律。方法:通过对大鼠右侧腮腺主导管双重结扎14 d后再通,建立腮腺组织萎缩后再生模型。分别于主导管再通术后0、1、3、5、7、10、14和21 d获取腮腺组织标本,应用HE和AB-PAS染色观察腺体的组织学变化,免疫组织化学染色法检测腺泡中增殖细胞核抗原(PCNA)、半胱氨酸天冬氨酸蛋白水解酶3(Caspase3)的表达。结果:组织学观察见:主导管结扎14 d后腺泡萎缩、消失,导管样结构增多,酶原颗粒消失;主导管再通术后,腺泡再生,导管样结构减少,酶原颗粒数目恢复正常。免疫组织化学染色分析结果示:在主导管结扎14 d后PCNA散在表达,主导管再通1 d后表达增加,5 d后达峰值,7 d后降低并趋于平稳;主导管结扎14 d及再通后Caspase3表达水平持续较低,且平稳。各实验组间PCNA表达差异有统计学意义(P＜0.05),而Caspase3表达差异无统计学意义。结论:腮腺主导管持续结扎14 d后再通,萎缩的腺泡可再生,形态及功能均可恢复正常水平,表明主导管持续结扎14 d对腺体组织造成的损伤完全可逆
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