Project description:The transgenerational maternal effects of PCOS in female progeny have been revealed. As there are evidence that a male equivalent of PCOS may exist, we asked whether sons born to mother with PCOS (PCOS-sons) transmit reproductive and metabolic phenotypes to their male progeny. Here, in a Swedish nationwide register-based cohort and a clinical case-control study from Chile we found that PCOS-sons are more often obese and dyslipidemic. Their serum miRNAs are found to potentially regulate PCOS-risk genes. Our prenatal androgenized PCOS-like mouse model with or without diet-induced obesity confirmed that reproductive and metabolic dysfunctions in F1 male offspring are passed down to F3. Small non-coding RNAs (sncRNAs) sequencing of F1-F3 sperm revealed distinct differentially expressed (DE) sncRNAs across generations in the androgenized, obese, and obese and androgenized lineages, respectively. Notably, common targets between transgenerational DEsncRNAs in mouse sperm and in PCOS-sons serum indicate similar effects of maternal hyperandrogenism. These findings strengthen the translational relevance highlighting a previously underappreciated risk of reproductive and metabolic dysfunction via the male germline transmission and potential molecular markers to study in future generations.
Project description:To explore the N6-methyladenosine (m6A) methylation abnormality of mRNAs and its potential roles in the mouse model of polycystic ovary syndrome (PCOS)
Project description:Ulcerative colitis (UC) is a chronic inflammatory condition of the colon, characterized by recurring mucosal inflammation. Current evidence suggests that dysbiosis may drive the disease, but mechanistic links remain incompletely understood. To further investigate the host-microbiome interactions, three UC-induction methods were used on a pseudo germ-free mouse model: (1) DSS, (2) fecal microbiota transplantation (FMT) from a UC patient, and (3) combination of both DSS and FMT simultaneously. Disease severity (DAI), immune cell profiles (flow cytometry), colon transcriptomics (RNA sequencing), and microbiota composition (16S rRNA sequencing) were assessed. Our study revealed distinct effects of DSS and FMT on experimental colitis. DSS had a more pronounced impact on disease severity, while FMT exerted a stronger influence on several immune populations and downregulation of genes associated with tight junctions and mucins. Microbiome analysis demonstrated distinct compositional profiles across all experimental groups. The combined FMT and DSS model exhibited features of both induction methods, resulting in exacerbated clinical scores, barrier dysfunction, and inflammatory responses. Our study provides valuable insight into host–microbiome interactions in UC and introduces a dual-hit approach that may more accurately recapitulate its multifactorial pathogenesis than DSS alone.
Project description:Polycystic ovary syndrome (PCOS) is a heterogeneous endocrine disorder characterized by hyperandrogenism, ovulatory dysfunction, and polycystic ovaries. In this study, we induced a PCOS rat model by oral administration of letrozole combined with a high-fat diet and then treated with mogroside V (MV) to evaluate the protective roles on endocrine and follicle development in PCOS rats and the underlying mechanisms. Purpose: To detect the difference of ovary transcriptome profiling between PCOS model and Control rat and to evaluate the effect of mogroside V on the transcriptome profiling of ovaries of PCOS model rats. Methods: Ovarian mRNA profiles of 15-week-old Control, PCOS and PCOS-MV group rats (4 rats per group) were generated by deep sequencing,using Illumina PE150.
Project description:Genome-wide association studies (GWAS) have identified polycystic ovary syndrome (PCOS)-associated loci, including DENND1A encoding a clathrin-binding protein involved in vesicle transport as a guanine nucleotide exchange factor. The effect of DENND1A on reproduction and whether it participates in follicle development disorder and androgen synthesis in PCOS remain unknown. Here, we demonstrated that DENND1A expression increased in ovarian granulosa cells (GCs) of PCOS patients and was positively correlated with serum testosterone concentration. We constructed a systemic transgenic Dennd1a mouse (TG mouse) model, which showed subfertility, irregular estrous cycles, and increased production of testosterone after PMSG stimulation. Moreover, TG mice showed hyporesponsiveness to PMSG with smaller ovary size and less well-developed follicles. Intracellular follicle-stimulating hormone receptor (FSHR) transport was disturbed by overexpression of Dennd1a, which promoted FSHR internalization and inhibited its recycling. Our findings revealed the reproductive function of DENND1A and the underlying mechanisms, which provided new insights into the PCOS pathogenesis and contributing to drug design for PCOS treatment.
Project description:To investigate the etiology of the hyperandrogenic phenotype of polycystic ovary syndrome (PCOS), a prenatally androgenized (PNA) mouse model was validated and used for microarray analysis.
Project description:In summary, we characterized the role of m6A modification in pulmonary fibrosis. We reveal that m6A modification is increased in bleomycin induced pulmonary fibrosis mice model, FMT-derived myofibroblasts and idiopathic pulmonary fibrosis patient lung samples. Lowering m6A level through silencing METTL3 suppress FMT process in vitro and vivo. Fundamentally, m6A modification regulates FMT by modulating the translation of KCNH6 mRNA in a YTHDF1 dependent manner. This study provides novel insights into the mechanism of FMT process and suggests m6A modification intervention may be a promising therapeutic strategy for pulmonary fibrosis.
Project description:This study aimed to characterize the liver transcriptomic changes in a mouse model of polycystic ovary syndrome (PCOS)–related non-alcoholic fatty liver disease (NAFLD) and to assess the therapeutic effects of baicalin (BA). Female C57BL/6J mice were implanted subcutaneously with dihydrotestosterone (DHT) pellets to induce PCOS-NAFLD. Liver tissues from control, model, and BA-treated mice were collected for RNA sequencing (RNA-seq). Differential gene expression and functional enrichment analyses were performed to identify biological processes and pathways associated with disease progression and BA intervention.