CD154

CD154, juga disebut ligan CD40 atau CD40L, adalah protein yang utamanya diekspresikan pada sel T yang teraktivasi.[1] Protein ini merupakan bagian dari superfamili molekul TNF. Protein ini mengikat pada CD40 di sel penyaji antigen. Secara keseluruhan, CD40L memiliki tiga pasangan: CD40, α5β1 integrin, dan αIIbβ3. Pada sel T pembantu, CD154 membantu kematangan dan fungsi sel B.[2] Kerusakan pada CD154 dapat mengakibatkan sindrom hiper IgM.[3] Ketiadaan CD154 juga menghentikan pembentukan pusat germinal, sehingga menghambat kematangan afinitas antibodi, yang merupakan suatu proses penting pada sistem imun adaptif.

Catatan kaki

  1. ^ Lederman S, Yellin MJ, Krichevsky A, Belko J, Lee JJ, Chess L (April 1992). "Identification of a novel surface protein on activated CD4+ T cells that induces contact-dependent B cell differentiation (help)". The Journal of Experimental Medicine. 175 (4): 1091–101. doi:10.1084/jem.175.4.1091. PMC 2119166. PMID 1348081.
  2. ^ Lederman S, Yellin MJ, Cleary AM, Pernis A, Inghirami G, Cohn LE, Covey LR, Lee JJ, Rothman P, Chess L (March 1994). "T-BAM/CD40-L on helper T lymphocytes augments lymphokine-induced B cell Ig isotype switch recombination and rescues B cells from programmed cell death". Journal of Immunology. 152 (5): 2163–71. PMID 7907632.
  3. ^ "Entrez Gene: CD40LG CD40 ligand (TNF superfamily, member 5, hyper-IgM syndrome)".


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