Li Yinfeng,Han Lei,Gu Yan,Zhang Xin,Li Hongmei,Zhou Lijuan,Yu Lili,Han Jian,Li Li.Effect of hypoxia on exosome secretion and Rab11 expression in syncytiotrophoblasts[J].J Amry Med Univ (J Third Mil Med Univ),2016,38(09):944-948.
Li Yinfeng,Han Lei,Gu Yan,Zhang Xin,Li Hongmei,Zhou Lijuan,Yu Lili,Han Jian,Li Li.Effect of hypoxia on exosome secretion and Rab11 expression in syncytiotrophoblasts[J].J Amry Med Univ (J Third Mil Med Univ),2016,38(09):944-948.DOI:
目的 探讨缺氧条件下,Rab11蛋白的表达变化及其在合体滋养细胞胞外体(syncytiotrophoblast exosome,STBEX)过度分泌中的作用。 方法 将传代培养的BeWo细胞分为4组(n=24),①BeWo常氧组:BeWo细胞在普通培养基、常氧条件下培养;②BeWo低氧组:BeWo细胞在普通培养基、低氧条件下培养(92% N
2
、5%CO
2
、3%O
2
);③融合BeWo常氧组:BeWo细胞以佛司可林(Forskolin)合体化刺激48 h后,常氧条件下培养;④融合BeWo低氧组:BeWo细胞以Forskolin合体化刺激48 h后,低氧条件下培养(92% N
2
、5%CO
2
、3%O
2
)。收集各组细胞上清液并检测STBEX蛋白浓度,采用Western blot检测各组细胞HIF-1α、Rab11蛋白的表达。 结果 与融合BeWo常氧组比较,融合BeWo低氧组上清液中STBEX的蛋白浓度升高,差异具有统计学意义(P0.05);与BeWo常氧组比较,BeWo低氧组上清液中STBEX蛋白浓度升高,差异具有统计学意义(P0.05); Western blot检测结果:与常氧培养组相比,低氧培养组细胞中HIF-1α与Rab11蛋白表达升高,差异具有统计学意义(P0.05)。 结论 缺氧条件下Rab11蛋白可能促进合体滋养细胞胞外体的过度分泌。
Abstract
Objective To determine the expression of Rab11 and its role in the excessive secretion of syncytiotrophoblast exosome (STBEX) when subjected to hypoxia. Methods The cultured BeWo cells were divided into 4 groups
that is
cultured under normoxic condition
under hypoxia (92% N
2
5%CO
2
and 3%O
2
)
under normoxic conditions after fusioned with Forskolin
and under hypoxia after f
usioned with Forskolin. Then the protein concentration of STBEX was measured in the supernatant of every group by BCA protein assay. The protein expression of HIF-1α and Rab11 were examined by Western blotting. Results Compared with the fused BeWo cells cultured under normoxic condition
the protein concentration of STBEX was significantly elevated in BeWo fused cells cultured under hypoxia (P0.05). The expression levels of HIF-1α and Rab11 were elevated when subjected to hypoxia (P0.05). Conclusion Rab11 may promote the excessive secretion of exosome from syncytiotrophoblasts when subjected to hypoxia.