The health of the semen microbiome could have far-reaching implications on male fertility, suggests recent research. A particular microbe, Lactobacillus iners, has been identified as a potential factor negatively affecting sperm motility—a key parameter in male fertility.
While discussions around microbiomes have typically centered around their influence on gastrointestinal health, there is a growing understanding that the microbiomes in other parts of the body, including semen, might hold significant sway over various health outcomes. It is this realization that has led researchers from the Department of Urology at UCLA to delve into the specifics of the semen microbiome and its correlation with fertility.
The study, which comprises an analysis of semen samples from 73 men, either undergoing vasectomy consultation or fertility evaluation, has yielded insightful results. Published in Scientific Reports and led by Vadim Osadchiy, the study found that men with more of this microbe [Lactobacillus iners] were more likely to have issues with sperm motility. This relationship is particularly relevant, considering that “the [cause] of abnormal semen analysis parameters is not identified in 30% of cases,” hinting at a possibly overlooked factor in the puzzle of male infertility.
Lactobacillus iners is known to produce L-lactic acid preferentially, creating a pro-inflammatory environment, which could be detrimental to sperm movement. This is a noteworthy departure from the previously documented impact of the microbe, which has been largely discussed in the context of the vaginal microbiome and its influence on female fertility.
However, the investigation into the semen microbiome does not end with Lactobacillus iners. The study also notes the presence of different bacteria within the Pseudomonas group. While Pseudomonas fluorescens and Pseudomonas stutzeri were found more commonly in patients with abnormal sperm concentrations, Pseudomonas putida was less common in such samples. This discovery underlines that not every member of a closely related group of microbes affects fertility identically.
The findings of the UCLA study align with previous, smaller studies, and are set to “pave the way for future, more comprehensive investigations to unravel the complex relationship between the semen microbiome and fertility,” according to Osadchiy. What makes the study particularly significant is its potential to guide new strategies and treatments for male infertility, which affects a substantial portion of couples trying to conceive.
Relevant articles:
– Semen microbiome health may impact male fertility. One microbe in particular, Lactobacillus iners, may have a direct negative impact on male fertility. Researchers found that men with more of this microbe were more likely to have issues with sperm motility.
– Semen microbiome health may impact male fertility, Phys.org, Thu, 18 Jan 2024 22:23:03 GMT
– Your semen has its own microbiome. It could be causing infertility, Cosmos, Sat, 20 Jan 2024 19:17:00 GMT
– Semen Microbiome: Study Reveals Microbes’ Powerful Influence on Male Fertility, Study Finds, Fri, 19 Jan 2024 13:54:23 GMT