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Oxidative damage to proteins involved in the acrosome reaction, such as acrosin and hyaluronidase, impairs the sperms ability to release these enzymes, preventing successful penetration of the oocyte ( 4 Sources of oxidative stress in sperm Oxidative stress in spermatozoa occurs when there is a disproportion between the generation of ROS and the capacity of the available antioxidant defenses to neutralize them

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Utilizing two discrete murine HCC models, we found that myeloid-specific deletion of Samhd1 promotes HCC progression through increased PD-L1 expression and CXCL1/2-mediated recruitment and activation of polymorphonuclear myeloid-derived suppressor cells (PMN-MDSCs)