[Effect of tocopherol, phenformin and thymus and pineal polypeptide factors on the transplacental carcinogenic effect of N-nitroso-N-ethylurea in rats].
Bespalov. V G VG; Aleksandrov. V A VA; Morozov. V G VG; Khavinson. V Kh VKh
Key Findings
- Transplacental ENU exposure mainly caused brain tumors in rats
- Thymalin, tocopherol, and epithalamin did not affect tumor incidence
- Phenformin reduced brain tumor occurrence
Practical Outcomes
- For biohackers, thymalin shows no protective effect against this type of prenatal carcinogen, so it isn’t a useful anti‑cancer strategy in this context. The study offers limited actionable insight for adult longevity or performance protocols.
Summary
In a rat study, giving newborns the peptide thymalin (along with tocopherol or pineal peptide) didn’t change the rate of brain tumors caused by a chemical that crosses the placenta, while the diabetes drug phenformin lowered tumor rates. This suggests thymalin doesn’t protect against that specific cancer risk.
Abstract
The study was concerned with the influence of postnatal treatment with antioxidant tocopherol, antidiabetic drug phenformin and low-molecular polypeptide factors of the thymus (thymalin) and pineal gland (epithalamin) on transplacental carcinogenicity of low-dose (7.5 mg/kg body weight, 3.2% of LD 50) N-ethyl-N-nitrosourea (ENU) in rats. Transplacental exposure to ENU was followed mainly by the development of brain tumors. Tumors of the spinal cord, peripheral nervous system and kidney were observed much more rarely. Treatment with tocopherol, thymalin or epithalamin did not significantly influence the transplacental carcinogenicity of ENU, whereas application of phenformin was followed by a decreased incidence of brain tumors.
Study Information
pubmed
1988