[The replacement of accessory T-lymphocytes by synthetic peptides during the formation of splenic hematopoietic colonies].
Semina. O V OV; Semenets. T N TN; Deĭgin. V I VI; Korotkov. A M AM; Poverennyĭ. A M AM
Key Findings
- Thymohexin increased splenic colony formation threefold in a mouse bone marrow assay.
- Thymogen showed little effect on colony formation, similar to natural thymocytes.
- When given together with thymocytes, thymohexin blocked their ability to restore colony formation, whereas thymogen did not interfere.
Practical Outcomes
- These results are specific to mouse immune cell cultures and do not provide clear guidance for human health, dosing, or longevity protocols. For biohackers, the study offers limited actionable insight and is mainly of academic interest.
Summary
The study tested two lab-made peptides, thymogen and thymohexin, to see if they could stand in for certain immune cells in mouse bone marrow experiments. Thymohexin boosted the growth of immune cell colonies, while thymogen did not, and the two peptides behaved differently when given together with natural thymus cells.
Abstract
Whether accessory T cells can be replaced by the synthetic immunomodulators thymogen (Glu-Trp) and thymohexin (Arg-Lys-Asp-Val-Tyr-Arg) was studied. The latter immunomodulator was found to show a 3-fold increase in splenic colony formation after incubation of bone marrow cells with rabbit antimouse brain serum (RAMBS). The former preparation failed to show the same action. Its effect was close to that of thymocytes. When the recipients exposed to lethal irradiation were administered the RAMBS-treated bone marrow cells and one of the peptides, it was shown that in concomitant administration, thymohexin and thymocytes lost their ability to restore colony formation by RAMBS-treated bone marrow. Thymogen did not suppress the stimulating activity of thymocytes. It is suggested that the differences observed between the tested peptides in their ability to recover colony formation were determined by their structure.
Study Information
pubmed
1993