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This research was funded by Instituto de Salud Carlos III (ISCIII)-Fondo de Investigacion Sanitaria (FIS)-Fondo Europeo de Desarrollo Regional FEDER grants PI19/00588 and PI19/00815 and by Sociedad Espanola de Nefrologia grant 9749/004. Salary support was from ISCIII Miguel Servet (to N. MendezBarbero), ISCIII predoctoral contract of Training in Investigation in Health PFIS (to A.M. Lopez-Diaz), Ministerio de Ciencia, Innovaci~on y Universidades (to J. Guerrero-Mauvecin), Red de Investigacion Renal (REDINREN) grant RD016/0009 (to M. Fontecha-Barriuso), and Ramon y Cajal program (to M.D. Sanchez-Ni~no and A.B. Sanz). We acknowledge Comunidad de Madrid en Biomedicina grant B2017/BMD-3686 CIFRA2-CM; FRIAT; IIS-Fundacion Jimenez Diaz Biobank grant PT17/0015/0006; and Instituto de Salud Carlos III FIS/FEDER grants PI17/00257, PI17/00119, PI20/00140, PI18/01366, PI20/00639, PI21/01126, DTS18/00032, European Research Area-PerMed-JTC2018 KIDNEY ATTACK AC18/00064 and Personalized treatment in IgA Nephropathy (PERSTIGAN) AC18/00071 and ISCIII-Redes tematicas de investigacion cooperativa en salud (RETICS) REDinREN RD016/0009.

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Bone Marrow-Derived RIPK3 Mediates Kidney Inflammation in Acute Kidney Injury

Publicado en:JOURNAL OF THE AMERICAN SOCIETY OF NEPHROLOGY. 33 (2): 357-373 - 2022-01-19 33(2), DOI: 10.1681/ASN.2021030383

Autores: Martin-Sanchez, Diego; Guerrero-Mauvecin, Juan; Fontecha-Barriuso, Miguel; Mendez-Barbero, Nerea; Laura Saiz, Maria; Lopez-Diaz, Ana M; Sanchez-Nino, Maria D; Carrasco, Susana; Cannata-Ortiz, Pablo; Ruiz-Ortega, Marta; Ortiz, Alberto; Sanz, Ana B

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Background Receptor-interacting protein kinase 3 (RIPK3), a component of necroptosis pathways, may have an independent role in inflammation. It has been unclear which RIPK3-expressing cells are responsible for the anti-inflammatory effect of overall Ripk3 deficiency and whether Ripk3 deficiency protects against kidney inflammation occurring in the absence of tubular cell death. Methods We used chimeric mice with bone marrow from wild-type and Ripk3-knockout mice to explore RIPK39s contribution to kidney inflammation in the presence of folic acid-induced acute kidney injury AKI (FA-AKI) or absence of AKI and kidney cell death (as seen in systemic administration of the cytokine TNFlike weak inducer of apoptosis [TWEAK]). Results Tubular and interstitial cell RIPK3 expressions were increased in murine AKI. Ripk3 deficiency decreased NF- kB activation and kidney inflammation in FA-AKI but did not prevent kidney failure. In the chimeric mice, RIPK3-expressing bone marrow-derived cells were required for early inflammation in FA-AKI. The NLRP3 inflammasome was not involved in RIPK39s proinflammatory effect. Systemic TWEAK administration induced kidney inflammation in wild-type but not Ripk3-deficient mice. In cell cultures, TWEAK increased RIPK3 expression in bone marrow-derived macrophages and tubular cells. RIPK3 mediated TWEAK-induced NF- kB activation and inflammatory responses in bone marrow-derived macrophages and dendritic cells and in Jurkat T cells; however, in tubular cells, RIPK3 mediated only TWEAKinduced Il-6 expression. Furthermore, conditioned media from TWEAK-exposed wild-type macrophages, but not from Ripk3-deficient macrophages, promoted proinflammatory responses in cultured tubular cells. Conclusions RIPK3 mediates kidney inflammation independently from tubular cell death. Specific targeting of bone marrow-derived RIPK3 may limit kidney inflammation without the potential adverse effects of systemic RIPK3 targeting.

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