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Apolipoprotein L-1 renal risk variants form active channels at the plasma membrane driving cytotoxicity.


ABSTRACT: Recently evolved alleles of Apolipoprotein L-1 (APOL1) provide increased protection against African trypanosome parasites while also significantly increasing the risk of developing kidney disease in humans. APOL1 protects against trypanosome infections by forming ion channels within the parasite, causing lysis. While the correlation to kidney disease is robust, there is little consensus concerning the underlying disease mechanism. We show in human cells that the APOL1 renal risk variants have a population of active channels at the plasma membrane, which results in an influx of both Na+ and Ca2+. We propose a model wherein APOL1 channel activity is the upstream event causing cell death, and that the activate-state, plasma membrane-localized channel represents the ideal drug target to combat APOL1-mediated kidney disease.

SUBMITTER: Giovinazzo JA 

PROVIDER: S-EPMC7292663 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature

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Apolipoprotein L-1 renal risk variants form active channels at the plasma membrane driving cytotoxicity.

Giovinazzo Joseph A JA   Thomson Russell P RP   Khalizova Nailya N   Zager Patrick J PJ   Malani Nirav N   Rodriguez-Boulan Enrique E   Raper Jayne J   Schreiner Ryan R  

eLife 20200519


Recently evolved alleles of Apolipoprotein L-1 (<i>APOL1</i>) provide increased protection against African trypanosome parasites while also significantly increasing the risk of developing kidney disease in humans. APOL1 protects against trypanosome infections by forming ion channels within the parasite, causing lysis. While the correlation to kidney disease is robust, there is little consensus concerning the underlying disease mechanism. We show in human cells that the APOL1 renal risk variants  ...[more]

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