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Researchers at the University of New Mexico have identified microplastics in the testicular tissue of both humans and dogs, a finding that could have significant implications for reproductive health. The study, which involved analyzing testicle samples from 47 dogs and 23 humans, detected 12 different types of microplastics, according to a report by Interesting Engineering.
The primary aim of the research was to quantify the amount and types of microplastics present in the testicles and to investigate their potential impact on sperm count, as well as the size and weight of the testicles and epididymis. The epididymis is a crucial part of the male reproductive system, a long, coiled tube that stores and matures sperm.
Surprising Findings in Dogs and Humans
The scientists employed a chemical technique to remove fats and proteins from the samples, making it easier to identify the plastics. They discovered a concentration of microplastics at 122.63 micrograms per gram in dogs and 328.44 micrograms per gram in humans. Polyethylene (PE), a commonly used plastic, was the most prevalent type found in both species.
One researcher expressed surprise at the discovery of microplastics in the dog samples and even more so in the human samples. Notably, the study linked certain plastics, like polyvinyl chloride (PVC), to lower sperm counts in dogs. PVC, which emits chemicals that can disrupt spermatogenesis, was found in higher amounts in the dog samples.
Implications for Reproductive Health
The study’s significance is underscored by the limited data on how microplastics affect sperm quality. Previous research has shown that heavy metals and pesticides can impact the endocrine system, suggesting that microplastics might have similar effects.
Sample Sources and Collection
Human tissue samples were obtained from the New Mexico Office of the Medical Investigator during autopsies, where the average age of the men was 35, indicating that microplastic exposure may start earlier than previously thought. Dog tissues were collected from animal shelters and veterinary clinics during sterilization procedures.
Why Dogs?
Dogs were chosen for this study due to the similarities in sperm production mechanisms and environmental exposure shared with humans. The findings raise concerns about the broader implications of microplastic pollution on reproductive health in both animals and humans.
This research marks a critical step in understanding the potential health risks posed by microplastics, highlighting the need for further studies to explore their impact on fertility and overall health.
