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However, no consistent evidence was found for a significant correlation between exposure to PFAS and sperm DNA fragmentation, apoptosis, or reproductive hormones ( in situ hybridization (FISH) for chromosomes 18, X and Y, and TUNEL coupled to flow cytometry for sperm DNA fragmentation, sperm disomy and diploidy rates, and the DNA fragmentation index were significantly increased in PFC-positive versus PFC-negative individuals ( in-vitro study using exposure of spermatozoa to environmentally relevant concentrations of a cocktail of PFAS has attempted to address this in the mouse model ( in-vitro did not affect the sperm functional profile, in terms of capacitation or fertilization rates, but did significantly delay the developmental progression of in-vitro fertilized day 4 preimplantation embryos, which suggested an alternative stress-mediated impact at fertilization

Some endogenous photosensitizers may also lead to the generation of O 2 ( 1 g ) upon exposure to UVA radiation 5,55

10.1104/pp.110.162123 Plant Physiol

Yasutomo, K