Project description:Whether myogenesis is affected by the maternal gut dysbacteriosis still remains ambiguous. In this study, firstly we show elevated level of lipopolysaccharides (LPS) in a gut microbiota dysbiosis mouse model. Secondly, we demonstrate that the diameter of muscle fibres, limb development and somitogenesis were inhibited in both gut microbiota dysbiosis and LPS exposed mice and chicken embryos. These might be due to LPS disturbed the cell survival and the key genes which regulating the somitogenesis and myogenesis. RNA sequencing and subsequent validation experiments verified that retinoic acid (RA) signaling perturbation was mainly responsible for the aberrant somite formation and differentiation. Subsequently, we found that LPS-induced Roxidative stress (ROS generation and antioxidant genes such as Nrf2, AKR) contributed to the above-mentioned interference with RA signaling. These findings highlight that the gut microbiota homeostasis also involved in regulating the development of muscle progenitor cells during pregnancy.
Project description:Whether myogenesis is affected by the maternal gut dysbacteriosis still remains ambiguous. In this study, firstly we show elevated level of lipopolysaccharides (LPS) in a gut microbiota dysbiosis mouse model. Secondly, we demonstrate that the diameter of muscle fibres, limb development and somitogenesis were inhibited in both gut microbiota dysbiosis and LPS exposed mice and chicken embryos. These might be due to LPS disturbed the cell survival and the key genes which regulating the somitogenesis and myogenesis. RNA sequencing and subsequent validation experiments verified that retinoic acid (RA) signaling perturbation was mainly responsible for the aberrant somite formation and differentiation. Subsequently, we found that LPS-induced Roxidative stress (ROS generation and antioxidant genes such as Nrf2, AKR) contributed to the above-mentioned interference with RA signaling. These findings highlight that the gut microbiota homeostasis also involved in regulating the development of muscle progenitor cells during pregnancy.
Project description:Metabolic diseases, such as obesity, diabetes, and cardiovascular diseases, pose significant health challenges in contemporary society. The development of these diseases is closely related to the balance of gut microbiota, the functionality of metabolic products, and metabolic dysregulation across various tissues and organs. Tibetan tea, a traditional post-fermented tea originating from Ya'an, Sichuan in Southwest China, is known for its unique fermentation process and flavor, as well as its multitude of health benefits, such as acting as a prebiotic, antioxidant, blood sugar reducer, antithrombotic, and obesity prevention agent. This has sparked widespread interest among scholars both domestically and internationally in its potential to address metabolic diseases such as obesity, diabetes, hyperlipidemia, and thrombosis formation. However, current research has mostly focused on the effects on single tissues, with less exploration into the role of Tibetan tea in multi-tissue responses. Therefore, this study employed large-scale sequencing technologies to deeply analyze the impact of Tibetan tea extract intervention on the gut microbiota and peripheral blood, as well as on the metabolism of 10 different tissues and organs, including the brain, brown fat, heart, liver, kidneys, pancreas, colon, white fat, skeletal muscle, and bone marrow in C57BL/6J mice under both normal and high-fat diet conditions. The aim was to reveal the holistic response and mechanism of host metabolism to Tibetan tea intervention, thereby providing new insights into nutritional intervention strategies for metabolic diseases.
2026-07-17 | GSE263214 | GEO
Project description:Intestinal microbiota of Tibetan medicine-Perinatal yaks
Project description:Early-weaning-induced stress causes diarrhea, thereby reduces growth performance of piglets. Gut bacterial dysbiosis emerges as a leading cause of post-weaning diarrhea. The present study was aimed to investigate the effect of capsulized fecal microbiota transportation (FMT) on gut bacterial community, immune response and gut barrier function of weaned piglets. Thirty-two were randomly divided into two groups fed with basal diet for 21 days. Recipient group was inoculated orally with capsulized fecal microbiota of health Tibetan pig daily morning during whole period of trial, while control group was given orally empty capsule. The results showed that the F/G ratio, diarrhea ratio, diarrhea index, and histological damage score of recipient piglets were significantly decreased. FMT treatment also significantly increased the colon length of piglets. Furthermore, the relative abundances of Firmicutes, Euryarchaeota, Tenericutes, Lactobacillus, Methanobrevibacter and Sarcina in colon of recipient piglets were increased, and the relative abundances of Campylobacter, Proteobacteria, and Melainabacteria were significantly decreased compared with control group.
Project description:In this study we investigated whether gut microbiota profile of Italian healthy volunteers could differ based on their geaographical origin. To this purpose, fecal samples were collected from 31 healthy individuals living in 3 different italian regions (Lombardy, North; Lazio, Center; Apulia, South) and their respective microbiota profiles were analyzed employing 16S metagenomic sequencing method. This study identifies differences in the gut microbiota content and richness among individuals with the same ethnicity coming from three different Italian regions.
Project description:Post-traumatic stress disorder (PTSD) is a mental health condition that has been associated with changes in gut microbiota and intestinal function. However, the molecular mechanisms driving these changes are not fully understood, and there is a need for an appropriate animal model to study the gut-brain axis in PTSD. The rat PTSD model, induced by footshock stress, is commonly used to simulate PTSD-like behaviors and physiological responses. This study aims to assess whether this model accurately reflects the alterations in gut gene expression and microbiota composition that are observed in PTSD.
Project description:MAF from pika Epas1-3FLAG knock-in mice were extracted and immortalized. After 12h DMOG treatment, cells were conducted for the ChIP-seq (Bmal1,Flag). We found that in knock-in mice fibroblasts, EPAS1-3FLAG can bind to similar E-box locus compared with BMAL1. Fibroblasts from mouse, rat, rabbit and Tibetan pika were extracted (and Tibetan pika fibroblasts were immortalized). RNA was extracted at 90% confluency. We found that Per2 mRNA level was significantly lower in Tibetan pika fibroblasts compared with other species.
Project description:Osteoporosis represents a significant health challenge, particularly in postmenopausal women. While traditional medicine offers potential solutions, the mechanisms underlying their efficacy remain elusive. This study demonstrates the bone-protective properties of Guilu Erxian gel decoction (GEX), a traditional medicine prepared from tortoise plastron, antler, and herbs, by elucidating its impact on gut microbiota and associated metabolites. Using an ovariectomized mouse model of postmenopausal osteoporosis, we demonstrate that GEX consumption significantly reduces key osteoporotic markers, including low bone mineral density, compromised trabecular microstructure, and reduced biomechanical strength. GEX intake profoundly reshapes the gut microbiome, enriching beneficial bacteria crucial for fatty acid metabolism and mineral absorption. Gut microbiota transplantation from GEX-fed mice to ovariectomized recipients reversed probiotic bacterial abundance, particularly Bifidobacterium and Akkermansia. This intervention effectively alleviated ovariectomy-induced colon inflammation, trimethylamine N-oxide (TMAO) overproduction, and osteoporosis progression. Excessive TMAO promotes osteoclastogenic differentiation in macrophages in vitro. Using μCT imaging, biomechanical testing, histological staining, and 16S rRNA sequencing, we provide compelling evidence for the complex therapeutic effects of GEX, including mitigation of osteoclast overburden, reduction of marrow adiposis, suppression of RANKL overproduction, and preservation of colon goblet cell mucin. This study demonstrates the interplay between gut microbiota, its metabolite TMAO, and bone health, offering new insights into the mechanism of action of GEX. Our findings not only validate the bone-protective potential of this traditional medicine but also open new avenues for developing microbiome-based strategies to combat osteoporosis.