As the global male infertility rate continues to rise, there is an urgent imperative to investigate the underlying causes of sustained deterioration in sperm quality. The gut microbiota emerges as a pivotal factor in host health regulation, with mounting evidence highlighting its dual influence on semen. This review underscores the interplay between the Testis-Gut microbiota axis and its consequential effects on sperm. Potential mechanisms driving the dual impact of gut microbiota on sperm encompass immune modulation, inflammatory responses mediated by endotoxins, oxidative stress, antioxidant defenses, gut microbiota-derived metabolites, epigenetic modifications, regulatory sex hormone signaling. Interventions such as probiotics, prebiotics, synbiotics, fecal microbiota transplantation, and Traditional natural herbal extracts are hypothesized to rectify dysbiosis, offering avenues to modulate gut microbiota and enhance Spermatogenesis and motility. Future investigations should delve into elucidating the mechanisms and foundational principles governing the interaction between gut microbiota and sperm within the Testis-Gut microbiota Axis. Understanding and modulating the Testis-Gut microbiota Axis may yield novel therapeutic strategies to enhance male fertility and combat the global decline in sperm quality.
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http://dx.doi.org/10.3389/fmicb.2024.1478082 | DOI Listing |
Hepatology
January 2025
I. Department of Medicine, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany.
Primary sclerosing cholangitis is one of the most challenging conditions in hepatology, and due to our limited understanding of its pathogenesis, no causal therapies are currently available. While it was long assumed that a minority of people with IBD also develop PSC, which is sometimes labeled an extraintestinal manifestation of IBD, the clinical phenotype, genetic and intestinal microbiota associations strongly argue for PSC-IBD being a distinct form of IBD, existing alongside ulcerative colitis and Crohn's disease. In fact, the liver itself could contribute to intestinal pathology, clinically overt in 60 - 80 % of patients.
View Article and Find Full Text PDFFEBS J
January 2025
APC Microbiome, University College Cork, Ireland.
Modern habits are becoming more and more disruptive to health. As our days are often filled with circadian disruption and stress exposures, we need to understand how our responses to these external stimuli are shaped and how their mediators can be targeted to promote health. A growing body of research demonstrates the role of the gut microbiota in influencing brain function and behavior.
View Article and Find Full Text PDFGut Microbes
December 2025
Department of Microbiology, Immunology & Molecular Genetics, University of Texas Health San Antonio, San Antonio, TX, USA.
The probiotic impact of microbes on host metabolism and health depends on both host genetics and bacterial genomic variation. is the predominant human gut commensal emerging as a next-generation probiotic. Although this bacterium exhibits substantial intraspecies diversity, it is unclear whether genetically distinct strains might lead to functional differences in the gut microbiome.
View Article and Find Full Text PDFJ Infect Dis
January 2025
Department of Epidemiology and Population Health, Albert Einstein College of Medicine, Bronx, New York, USA.
Background: Aging-related comorbidities are more common in people with human immunodeficiency virus (HIV) compared to people without HIV. The gut microbiome may play a role in healthy aging; however, this relationship remains unexplored in the context of HIV.
Methods: 16S rRNA gene sequencing was conducted on stool from 1409 women (69% with HIV; 2304 samples) and 990 men (54% with HIV; 1008 samples) in the MACS/WIHS Combined Cohort Study.
J Physiol
January 2025
Department of Physiology and Membrane Biology, University of California Davis School of Medicine, Sacramento, CA, USA.
The complex microbial community residing in the human gut has long been understood to regulate gastrointestinal physiology and to participate in digestive diseases, but its extraintestinal actions and influences are increasingly recognized. This article discusses bidirectional interactions between the gut microbiome and athletic performance, metabolism, longevity and the ability of the gut-brain axis to influence cognitive function and mental health.
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