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- W2956947108 abstract "The Middle Asian tortoise Testudo horsfieldii is one of the most radioresistant animals, with Lethal Dose (LD) 50/30 around 500 Gy. Extracts were prepared from different organs of the tortoise, and their biological activity was evaluated. Crude extract from the spleen was found to significantly increase survival of mice treated with lethal doses of radiation. In an iterative process, the active extract was purified by chromatography, and the fractions were screened for biological activity. Various vital parameters were monitored: peripheral blood leukocytes, spleen colonies, mitosis in the bone marrow, and survival after 30 days. The process concluded with the isolation, characterization, and synthesis of the tetrapeptide FTGN, which accelerated repopulation of the irradiated bone marrow at very low concentrations both in vivo and ex vivo. A fluorescently labeled derivative of the peptide was found to selectively associate to CD34 + stem cells, suggesting that the peptide mediates their proliferation and allows fast repopulation of hematopoietic lineages. Interestingly, the peptide protected animals from alopecia. The studies in experimental animals suggest that treatment with FTGN can potentially benefit patients who suffer bone marrow damage due to radiotherapy or chemotherapy and patients undergoing autologous or allogenic bone marrow transplantation." @default.
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- W2956947108 date "2019-07-16" @default.
- W2956947108 modified "2023-10-16" @default.
- W2956947108 title "A peptide from<i>Testudo horsfieldii</i>tortoise spleen as a potential helper for reducing acute radiation syndrome" @default.
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- W2956947108 doi "https://doi.org/10.1002/psc.3202" @default.
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