Leucine Rich Repeat Containing 32 (LRRC32), also known as Glycoprotein A Repetitions Predominant (GARP), has been postulated as a novel surface marker of activated T(regs). LRRC32 binds directly to the TGF-beta latency associated peptide (LAP) and tethers latent TGF-beta on the surface of activated Treg cells. The presentation of TGF-beta on Tregs contributes to their ability to suppress naive T cell proliferation. LRRC32 is widely expressed during embryogenesis and on adult platelets. Human LRRC32 is identified as a lineage specific key receptor for human T cells.
TMPJ-00364
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