Age-dependent experimental tumor dissemination of murine melanoma B16.
Baumgart. J J; Zippel. D D
Key Findings
- Older mice develop significantly more lung metastases than young mice
- Cyclophosphamide (immunosuppressive) increases metastasis formation
- Poly(I:C) reduces metastases, but thymalin shows practically no effect
Practical Outcomes
- For biohackers looking for anti‑cancer or immune‑boosting supplements, thymalin appears ineffective in this mouse melanoma model. Focus on proven immune modulators or lifestyle strategies rather than thymalin for tumor control.
Summary
In a mouse study, older mice got many more lung tumors than young ones. Giving a strong immune‑suppressing drug made tumors even worse, while a viral‑mimic drug helped reduce them. The peptide thymalin didn’t change tumor spread at all, suggesting it isn’t useful for fighting cancer in this model.
Abstract
Female C57BL/6 Jena mice, 3-, 12-, and 18-month-old, were inoculated intravenously (i.v.) with syngeneic melanoma B16 cells. The number of experimental lung metastases, counted 21 days after tumor inoculation, was significantly higher in older hosts. Pretreatment of young adult mice with immunosuppressive dose of cyclophosphamide considerably increased the number of lung nodules. The number of lung metastases was reduced when young and old animals were pretreated or treated with Poly (I:C). Similar treatment of mice with two other immunomodulators (thymalin and diacetyl-splenopentin 5) was practically without effect on metastasis formation. It is suggested that the higher number of experimental metastases of melanoma B16 in aged mice is mediated by immuno-senescence.
Study Information
pubmed
1991