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Peer-reviewed veterinary case report

Canine interferon gamma can slow growth of some dog tumors

By Hamamura, Yuki et al.·Published in Research in veterinary science·2020·Joint Faculty of Veterinary Medicine, Japan·View original on PubMed

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Original publication title: The inhibitory effect of canine interferon gamma on the growth of canine tumors.

Species:
dog

Plain-English summary

A study looked at how a treatment called recombinant canine interferon-gamma (rc-IFNγ) affects the growth of tumors in dogs. It was found to significantly slow down the growth of certain mammary gland tumors and mast cell tumors in the lab. While it also caused some cell death in lymphoma cells, the exact way it works is still not fully understood. This treatment is primarily used for skin allergies in dogs but shows promise for helping with cancer as well. More research is needed to clarify how it can be effectively used in canine cancer treatment.

People also search for: dog cancer treatment options · canine interferon gamma for tumors · mast cell tumor treatment in dogs

Abstract

Recombinant canine interferon-γ (rc-IFNγ; Interdog) was exclusively approved as a therapeutic for canine atopic dermatitis. However, it has been used off-label for the treatment of canine cancer. We examined the inhibitory effect of rc-IFNγ on the growth of canine tumor cell lines and analyzed its mechanism of action. Three (CTB-p, CTB-m, and CNM-m) out of seven mammary gland tumor cell lines and two (VIMC and CoMS) out of four mast cell tumor cell lines showed remarkable growth inhibition after treatment with rc-IFNγ. However, one (CLBL-1) out of nine lymphoma cell lines showed a significant amount of cell death. Using CTB-p and CTB-m cell lines, we showed that STAT1 was essential for inducing the growth inhibitory effect of rc-IFNγ. Although rc-IFNγ induced G1 growth arrest in CTB-p cell line, treatment with rc-IFNγ did not alter the expression of cell cycle regulatory proteins. In this study, we observed direct cytotoxicity or cytostatic effects of rc-IFNγ in canine tumor cell lines. However, the detailed mechanisms responsible for these effects need to be elucidated in the future.

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Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/32799170/