Mutation of SH2B3 (LNK), a genome-wide association study candidate for hypertension, attenuates Dahl salt-sensitive hypertension via inflammatory modulation

Hypertension
Nathan P RudemillerDavid L Mattson

Abstract

Human genome-wide association studies have linked SH2B adaptor protein 3 (SH2B3, LNK) to hypertension and renal disease, although little experimental investigation has been performed to verify a role for SH2B3 in these pathologies. SH2B3, a member of the SH2B adaptor protein family, is an intracellular adaptor protein that functions as a negative regulator in many signaling pathways, including inflammatory signaling processes. To explore a mechanistic link between SH2B3 and hypertension, we targeted the SH2B3 gene for mutation on the Dahl salt-sensitive (SS) rat genetic background with zinc-finger nucleases. The resulting mutation was a 6-bp, in-frame deletion within a highly conserved region of the Src homology 2 (SH2) domain of SH2B3. This mutation significantly attenuated Dahl SS hypertension and renal disease. Also, infiltration of leukocytes into the kidneys, a key mediator of Dahl SS pathology, was significantly blunted in the Sh2b3(em1Mcwi) mutant rats. To determine whether this was because of differences in immune signaling, bone marrow transplant studies were performed in which Dahl SS and Sh2b3(em1Mcwi) mutants underwent total body irradiation and were then transplanted with Dahl SS or Sh2b3(em1Mcwi) mutant bone marro...Continue Reading

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Citations

Dec 31, 2015·Current Opinion in Nephrology and Hypertension·Bethany L Dale, Meena S Madhur
Nov 18, 2015·Current Opinion in Nephrology and Hypertension·Brittany WadeDavid L Mattson
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