The proliferation impairment induced by AQP3 deficiency is the result of glycerol uptake and metabolism inhibition in gastric cancer cells

Tumour Biology : the Journal of the International Society for Oncodevelopmental Biology and Medicine
Zheng LiHao Xu

Abstract

Gastric cancer is a big threat to human health. Effective therapeutic cancer target remains to be discovered. Aquaporin 3 (AQP3) belongs to a family of transmembrane channels that are important in transporting water, glycerol, and other small molecules across the cell membrane. Glycerol that is transported by AQP3 is necessary for cell energy generation and lipid synthesis which fulfill the cell biological processes. Previous studies have shown that AQP3 is implicated in disease progression in several cancer types. However, whether AQP3-regulated glycerol uptake and metabolism were involved in cancer progression remains to be further studied. Our study demonstrated that the expression of AQP3 was positively correlated with glycerol level in human gastric cancer tissues. AQP3 inhibition induced proliferation impairment in gastric cancer cells both in vitro and in vivo. AQP3 inhibition that induced glycerol uptake reduction and glycerol administration would rehabilitate the cell proliferation. The energy and lipid production decreased when AQP3 was knocked down since the cellular glycerol level and several lipogenesis enzymes were downregulated. PI3K/Akt signaling pathway, which was involved in the impaired lipid and ATP producti...Continue Reading

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