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The effect of 5-aminolevulinic acid on canine peripheral blood mononuclear cells

ABSTRACT: 5-aminolevulinic acid (ALA) is one of the natural amino acids and a product of the first heme synthesis pathway in mitochondria. Recently, a supplement containing ALA is available in Japan and used for the purpose of the enhancement of ATP synthesis via mitochondrial activity. In humans, the immunomodulatory effect of ALA has attracted attention as a new function of ALA, and its application to cancer, inflammatory disease, and autoimmune diseases are being investigated. In the present study, to evaluate the effects of ALA on canine immunity, we performed in vitro studies using peripheral blood mononuclear cells (PBMC) from healthy dogs. Heme oxygenase-1 protein was expressed in Madin-Darby Canine Kidney cells and PBMCs treated with 5-ALA and ferrous sodium citrate (SFC), which showed that ALA works in dogs as well as humans. When PBMCs were stimulated with concanavalin A (ConA), the addition of ALA resulted in a significant increase in interferon-gamma (IFN-γ) produced by ConA-stimulated PBMCs. A comprehensive genetic alteration using next-generation RNA sequences (RNA-seq) was performed. From the result of RNA-seq, ALA enhanced the gene expression of T cell immunity including Th1, Th2, and Th17 subsets. In particular, the IL-17 signaling pathway was significantly upregulated. Then, we confirmed that ALA promoted the production of interleukin (IL)-17A in ConA-stimulated PBMCs. Together, these findings reveal that ALA promotes heme synthesis in mitochondria and enhances ConA-induced T cell immune responses in canine PBMCs.

ORGANISM(S): Canis lupus familiaris

PROVIDER: GSE205679 | GEO | 2022/08/05

REPOSITORIES: GEO

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