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ACK1 and BRK Non-receptor Tyrosine Kinase Deficiencies Are Associated with Familial Systemic Lupus and Involved in Efferocytosis

Abstract

Systemic Lupus Erythematosus (SLE) is an autoimmune disease, the pathophysiology and genetic basis of which are incompletely understood. Using a forward genetic screen in multiplex families with systemic lupus erythematosus (SLE) we identified an association between SLE and compound heterozygous deleterious variants in the non-receptor tyrosine kinases (NRTKs) ACK1 and BRK. Experimental blockade of ACK1 or BRK increased circulating autoantibodies in mice and exacerbated glomerular IgG deposits in an SLE mouse model. Mechanistically, non-receptor tyrosine kinases (NRTKs) regulate activation, migration, and proliferation of immune cells. We found that the patients' ACK1 and BRK variants impair efferocytosis, the MERTK-mediated anti-inflammatory response to apoptotic cells, in human induced Pluripotent Stem Cell (hiPSC)-derived macrophages, which may contribute to SLE pathogenesis. Overall, our data suggest that ACK1 and BRK deficiencies are associated with human SLE and impair efferocytosis in macrophages.

References
1.
Albert M, Kim J, Birge R . alphavbeta5 integrin recruits the CrkII-Dock180-rac1 complex for phagocytosis of apoptotic cells. Nat Cell Biol. 2001; 2(12):899-905. DOI: 10.1038/35046549. View

2.
Mahajan N, Whang Y, Mohler J, Earp H . Activated tyrosine kinase Ack1 promotes prostate tumorigenesis: role of Ack1 in polyubiquitination of tumor suppressor Wwox. Cancer Res. 2005; 65(22):10514-23. DOI: 10.1158/0008-5472.CAN-05-1127. View

3.
Hanayama R, Tanaka M, Miwa K, Shinohara A, Iwamatsu A, Nagata S . Identification of a factor that links apoptotic cells to phagocytes. Nature. 2002; 417(6885):182-7. DOI: 10.1038/417182a. View

4.
Menez S, El Essawy B, Atta M . Lupus Nephritis: Current Treatment Paradigm and Unmet Needs. Rev Recent Clin Trials. 2017; 13(2):105-113. DOI: 10.2174/1574887112666171123113200. View

5.
Satoh M, Reeves W . Induction of lupus-associated autoantibodies in BALB/c mice by intraperitoneal injection of pristane. J Exp Med. 1994; 180(6):2341-6. PMC: 2191761. DOI: 10.1084/jem.180.6.2341. View