Description
Thymopentin is a five amino acid peptide fragment of thymopoietin that exhibits immunostimulatory and anticancer activities. Thymopentin decreases iNOS activity in the treatment of Sezary Syndrome, a severe form of lymphoma. In leukemia cells, thymopentin inhibits proliferation and colony formation and induces differentiation. In macrophages, thymopentin increases pro-inflammatory cytokine secretion, activation of NF-κB, production of HSP72, and signaling by JNK. Thymopentin shows clinical benefit when used as an adjuvant, improving the response rate in subjects administered hepatitis B vaccines.
References
Patruno A, Tosco P, Borretto E, et al. Thymopentin down-regulates both activity and expression of iNOS in blood cells of Sézary syndrome patients. Nitric Oxide. 2012 Oct 15;27(3):143-9. PMID: 22721692.
Lunin SM, Glushkova OV, Khrenov MO, et al. Thymus peptides regulate activity of RAW 264.7 macrophage cells: inhibitory analysis and a role of signal cascades. Expert Opin Ther Targets. 2011 Dec;15(12):1337-46. PMID: 22148922.
Fan YZ, Chang H, Yu Y, et al. Thymopentin (TP5), an immunomodulatory peptide, suppresses proliferation and induces differentiation in HL-60 cells. Biochim Biophys Acta. 2006 Oct;1763(10):1059-66. PMID: 16952408.
Fabrizi F, Dixit V, Martin P. Meta-analysis: the adjuvant role of thymopentin on immunological response to hepatitis B virus vaccine in end-stage renal disease. Aliment Pharmacol Ther. 2006 Jun 1;23(11):1559-66. PMID: 16696803.
