A tripartite complex of suPAR, APOL1 risk variants and α(v)β(3) integrin on podocytes mediates chronic kidney disease.

A tripartite complex of suPAR, APOL1 risk variants and α(v)β(3) integrin on podocytes mediates chronic kidney disease.
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DOI:
10.1038/nm.4362
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发表时间:
2017-08
期刊:
影响因子:
82.9
通讯作者:
Reiser J
Reiser J
中科院分区:
医学1区
文献类型:
--
作者:
Hayek SS;Koh KH;Grams ME;Wei C;Ko YA;Li J;Samelko B;Lee H;Dande RR;Lee HW;Hahm E;Peev V;Tracy M;Tardi NJ;Gupta V;Altintas MM;Garborcauskas G;Stojanovic N;Winkler CA;Lipkowitz MS;Tin A;Inker LA;Levey AS;Zeier M;Freedman BI;Kopp JB;Skorecki K;Coresh J;Quyyumi AA;Sever S;Reiser J

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Soluble urokinase plasminogen activator receptor (suPAR) independently predicts chronic kidney disease (CKD) incidence and progression. Apolipoprotein L1 (APOL1) gene variants G1 and G2, but not the reference allele (G0), are associated with an increased risk of CKD in individuals of recent African ancestry. Here we show in two large, unrelated cohorts that decline in kidney function associated with APOL1 risk variants was dependent on plasma suPAR levels: APOL1-related risk was attenuated in patients with lower suPAR, and strengthened in those with higher suPAR levels. Mechanistically, surface plasmon resonance studies identified high-affinity interactions between suPAR, APOL1 and αvβ3 integrin, whereby APOL1 protein variants G1 and G2 exhibited higher affinity for suPAR-activated avb3 integrin than APOL1 G0. APOL1 G1 or G2 augments αvβ3 integrin activation and causes proteinuria in mice in a suPAR-dependent manner. The synergy of circulating factor suPAR and APOL1 G1 or G2 on αvβ3 integrin activation is a mechanism for CKD.
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