首页> 外文期刊>Journal of Epithelial Biology & Pharmacology >Disruptive Effect of Epigallocatechin-3-Gallate on the Proliferation/Apoptosis Balance in the Olfactory Epithelium
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Disruptive Effect of Epigallocatechin-3-Gallate on the Proliferation/Apoptosis Balance in the Olfactory Epithelium

机译:表没食子儿茶素-3-没食子酸酯对嗅觉上皮细胞增殖/凋亡平衡的破坏作用

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The polyphenol epigallocatechin-3-gallate (EGCG), is the main active catechin of the green tea. It exerts a wide range of biochemical and pharmacological effects on different animal cells. EGCG acts as a scavenger of growth factors and it was demonstrated its antiproliferative and proapoptotic role in different cancer cells. Nevertheless, little is known about the effect of EGCG on normal cells. In the present work, we have studied the EGCG effect on the proliferation/ apoptosis balance in the olfactory epithelium of amphibian tadpoles. Animals treated with EGCG showed an increase in the number of apoptotic cells and a decrease in the basal proliferation. In addition, EGCG showed differential effect on the two classical growth factors signalling pathways, MAPK and PI3K route. EGCG treatment triggered a drop in phospho- ERK1/2 level without affecting the phospho-AKT level. These findings demonstrate the antiproliferative and proapoptotic effect of EGCG on normal olfactory cells and postulate the olfactory epithelium as a good experimental model for the study of the factors involved in neurogenesis process.
机译:多酚表没食子儿茶素-3-没食子酸酯(EGCG)是绿茶的主要活性儿茶素。它对不同的动物细胞具有广泛的生化和药理作用。 EGCG可作为生长因子的清除剂,并被证明在不同癌细胞中具有抗增殖和促凋亡作用。然而,关于EGCG对正常细胞的作用所知甚少。在目前的工作中,我们已经研究了EGCG对两栖t嗅上皮细胞增殖/凋亡平衡的影响。用EGCG治疗的动物显示出凋亡细胞的数量增加和基础增殖的减少。此外,EGCG对两个经典的生长因子信号通路,MAPK和PI3K途径显示出不同的作用。 EGCG处理触发了磷酸-ERK1 / 2水平的下降,而没有影响磷酸-AKT水平。这些发现证明了EGCG对正常嗅觉细胞的抗增殖和促凋亡作用,并假定嗅觉上皮是研究神经发生过程相关因素的良好实验模型。

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