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• W2953610511 abstract "Type I gastric neuroendocrine tumors (gNETs) arise from hypergastrinemia in patients with autoimmune chronic atrophic gastritis. According to the classical model, the gastric H+/K+ ATPase was the causative autoantigen recognized by CD4+ T cells in chronic autoimmune scenario that secretes IL-17 and correlates with parietal cell (PC) atrophy, which drives to gastric achlorhydria and increases the risk for gastric neoplasms. However, the mechanism by which the inflammatory response correlates with PC atrophy is not clearly defined. Recently, we found that the ATP4Ap.R703C mutation impaired PC function and gastric acidification, which drove familial gNET. Our group constructed a knock-in mouse model for the ATP4A mutation, which has served us to better understand the relation between impaired capability to export protons across the plasma membrane of PCs and tumor progression. The ATP4Ap.R703C mutation drives gastric achlorhydria, but also deregulates the acid–base balance within PCs, affecting mitochondrial biogenesis. Mitochondrial malfunction activates ROS signaling, which triggers caspase-3-mediated apoptosis of parietal cells. In addition, when gastric euchlorhydria was restored, mitochondrial function is recovered. Infection by H. pylori promotes destabilization of the mitochondria of the PCs by a mechanism similar to that described for APT4Ap.R703C carriers. A genetic origin that drives mitochondria alteration would initiate the gastric chronic inflammation instead of the classical IL-17 secretion-mediated mechanism explanation. Gastric euchlorhydria restoration is suggested to be indicated for mitochondrial recover. Our results open a new window to understand gastric neoplasms formation but also the inflammatory mechanisms and autoimmune disorders conducted by genetic origin that composes a premalignant scenario." @default.
• W2953610511 created "2019-07-12" @default.
• W2953610511 creator A5019777771 @default.
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• W2953610511 date "2019-06-27" @default.
• W2953610511 modified "2023-09-26" @default.
• W2953610511 title "A genetic origin for acid–base imbalance triggers the mitochondrial damage that explains the autoimmune response and drives to gastric neuroendocrine tumours" @default.
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• W2953610511 doi "https://doi.org/10.1007/s10120-019-00982-4" @default.
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