Thymopentin (TP-5)
Overview
A synthetic pentapeptide (Arg-Lys-Asp-Val-Tyr) corresponding to residues 32-36 of thymopoietin, a thymic hormone involved in T-cell differentiation. Thymopentin stimulates early T-cell precursor differentiation and modulates mature T-cell function by enhancing IL-2 production and expression of T-cell surface markers.
Mechanism of Action
It partially restores immune function in immunocompromised states without the risks of whole thymic extracts.
Research Summary & Key Findings
Clinical trials showed improvements in T-cell subsets and function in primary immunodeficiency disorders and HIV infection. Approved in some countries as an immunomodulatory adjunct. Research demonstrated efficacy in reducing infection rates in immunosuppressed patients post-chemotherapy. Also investigated for rheumatoid arthritis and chronic hepatitis B with variable results.
Clinical Status
Thymopentin (TP-5) is in the investigational stage. While preclinical and early-phase data exist, it has not received regulatory approval for clinical use in the United States.
Administration Routes
References
Primary literature
- PubMed — "Thymopentin"
Peer-reviewed literature indexed by the National Library of Medicine.
- ClinicalTrials.gov — "Thymopentin"
Registered interventional and observational studies, including status and phase.
- PubChem — "Thymopentin"
Chemical structure, molecular properties, and bioactivity data.
Study-level citations for this compound are being verified against the primary sources before publication. The database queries above return the current indexed literature in the meantime.
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