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  • Title: Knocking Out Sigma-1 Receptors Reveals Diverse Health Problems.
    Author: Couly S, Goguadze N, Yasui Y, Kimura Y, Wang SM, Sharikadze N, Wu HE, Su TP.
    Journal: Cell Mol Neurobiol; 2022 Apr; 42(3):597-620. PubMed ID: 33095392.
    Abstract:
    Sigma-1 receptor (Sig-1R) is a protein present in several organs such as brain, lung, and heart. In a cell, Sig-1R is mainly located across the membranes of the endoplasmic reticulum and more specifically at the mitochondria-associated membranes. Despite numerous studies showing that Sig-1R could be targeted to rescue several cellular mechanisms in different pathological conditions, less is known about its fundamental relevance. In this review, we report results from various studies and focus on the importance of Sig-1R in physiological conditions by comparing Sig-1R KO mice to wild-type mice in order to investigate the fundamental functions of Sig-1R. We note that the Sig-1R deletion induces cognitive, psychiatric, and motor dysfunctions, but also alters metabolism of heart. Finally, taken together, observations from different experiments demonstrate that those dysfunctions are correlated to poor regulation of ER and mitochondria metabolism altered by stress, which could occur with aging.
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