<i>Lactiplantibacillus plantarum</i> 299v supplementation modulates β-cell ER stress and antioxidative defense pathways and prevents type 1 diabetes in gluten-free BioBreeding rats.
Pinar SarginMark F RoethleShuang JiaTarun PantAshley E CieckoSamantha N AtkinsonNita H SalzmanRu-Jeng TengYi-Guang ChenSusanne M CabreraMartin J HessnerPublished in: Gut microbes (2022)
The increasing incidence of Type 1 diabetes has coincided with the emergence of the low-fiber, high-gluten Western diet and other environmental factors linked to dysbiosis. Since <i>Lactiplantibacillus plantarum</i> 299 v (Lp299v) supplementation improves gut barrier function and reduces systemic inflammation, we studied its effects in spontaneously diabetic DR<i>lyp/lyp</i> rats provided a normal cereal diet (ND) or a gluten-free hydrolyzed casein diet (HCD). All rats provided ND developed diabetes (62.5±7.7 days); combining ND with Lp299v did not improve survival. Diabetes was delayed by HCD (72.2±9.4 days, p = .01) and further delayed by HCD+Lp299v (84.9±14.3 days, p < .001). HCD+Lp299v pups exhibited increased plasma propionate and butyrate levels, which correlated with enriched fecal <i>Bifidobacteriaceae</i> and <i>Clostridiales</i> taxa. Islet transcriptomic and histologic analyses at 40-days of age revealed that rats fed HCD expressed an autophagy profile, while those provided HCD+Lp299v expressed ER-associated protein degradation (ERAD) and antioxidative defense pathways, including Nrf2. Exposing insulinoma cells to propionate and butyrate promoted the antioxidative defense response but did not recapitulate the HCD+Lp299v islet ERAD transcriptomic profile. Here, both diet and microbiota influenced diabetes susceptibility. Moreover, Lp299v supplement modulated antioxidative defense and ER stress responses in β-cells, potentially offering a new therapeutic direction to thwart diabetes progression and preserve insulin secretion.
Keyphrases
- type diabetes
- glycemic control
- cardiovascular disease
- weight loss
- single cell
- physical activity
- induced apoptosis
- anti inflammatory
- cell cycle arrest
- oxidative stress
- celiac disease
- cell death
- innate immune
- insulin resistance
- signaling pathway
- rna seq
- risk factors
- stem cells
- metabolic syndrome
- estrogen receptor
- mouse model
- mesenchymal stem cells
- wound healing
- editorial comment
- solid state