title: Effects and mechanisms of prolongevity induced by Lactobacillus gasseri SBT2055 in Caenorhabditis elegans.
abstract: Lactic-acid bacteria are widely recognized beneficial host associated groups of the microbiota of humans and animals. Some lactic-acid bacteria have the ability to extend the lifespan of the model animals. The mechanisms behind the probiotic effects of bacteria are not entirely understood. Recently, we reported the benefit effects of Lactobacillus gasseriSBT2055 (LG2055) on animal and human health, such as preventing influenza A virus, and augmentation of IgA production. Therefore, it was preconceived that LG2055 has the beneficial effects on longevity and/or aging. We examined the effects of LG2055 on lifespan and aging of Caenorhabditis elegans and analyzed the mechanism of prolongevity. Our results demonstrated that LG2055 has the beneficial effects on longevity and anti-aging of C. elegans. Feeding with LG2055 upregulated the expression of the skn-1 gene and the target genes of SKN-1, encoding the antioxidant proteins enhancing antioxidant defense responses. We found that feeding with LG2055 directly activated SKN-1 activity via p38 MAPK pathway signaling. The oxidative stress response is elicited by mitochondrial dysfunction in aging, and we examined the influence of LG2055 feeding on the membrane potential of mitochondria. Here, the amounts of mitochondria were significantly increased by LG2055 feeding in comparison with the control. Our result suggests that feeding with LG2055 is effective to the extend lifespan in C. elegans by a strengthening of the resistance to oxidative stress and by stimulating the innate immune response signaling including p38MAPK signaling pathway and others.
authors.affiliation: Department of Probiotics Immunology, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan.
authors.forename: Hisako
authors.initials: H
authors.lastname: Nakagawa
authors.affiliation: Department of Probiotics Immunology, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan.
authors.forename: Takuya
authors.initials: T
authors.lastname: Shiozaki
authors.affiliation: Milk science Research Institute, Megmilk Snow Brand Co., Ltd, Kawagoe, Japan.
authors.forename: Eiji
authors.initials: E
authors.lastname: Kobatake
authors.affiliation: Milk science Research Institute, Megmilk Snow Brand Co., Ltd, Kawagoe, Japan.
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Hosoya
authors.affiliation: Milk science Research Institute, Megmilk Snow Brand Co., Ltd, Kawagoe, Japan.
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Moriya
authors.affiliation: Milk science Research Institute, Megmilk Snow Brand Co., Ltd, Kawagoe, Japan.
authors.forename: Fumihiko
authors.initials: F
authors.lastname: Sakai
authors.affiliation: Laboratory of Neuronal Cell Biology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan.
authors.forename: Hidenori
authors.initials: H
authors.lastname: Taru
authors.affiliation: Department of Probiotics Immunology, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan.
authors.forename: Tadaaki
authors.initials: T
authors.lastname: Miyazaki
mesh_terms: D000818:Animals; D017173:Caenorhabditis elegans / Q000382:microbiology* / Q000502:physiology*; D000069998:Lactobacillus gasseri / Q000502:physiology*; D008136:Longevity / Q000502:physiology*; D015398:Signal Transduction
keywords: Caenorhabditis elegans; Lactobacillus gasseriSBT2055; aging; antioxidant; longevity; mitochondria