Nana Satake

TL;DR: It is suggested that the boar-specific and sperm subpopulation-specific interactions between sperm motility activation and suppression responses are likely to result in sperm selection before the spermatozoa meet the oocytes.

TL;DR: It is shown that the survival enhancing property of the soluble protein fraction seems to depend significantly upon heat shock 70 kDa protein 8 (HSPA8 previously known as HSPA10), which may represent a common biological mechanism for the maintenance of sperm survival in the oviduct.

TL;DR: Sperm protamine content and sperm DNA damage are closely associated and Protamine deficiency is likely to be one of the contributing factors to DNA instability and damage, which can affect bull fertility.

TL;DR: Exposure to the lower molecular fraction significantly inhibited, but did not abolish, the bicarbonate-induced stimulation of motility, and the results show that subpopulations of spermatozoa respond differentially to oviductal fluid, and suggest that exposure to oVIDUCTal fluid in vivo could exert a further level of functional sperm selection.

TL;DR: An integrative model of cryo-induced osmotic injury is proposed that involves a combination of structural damage and oxidative stress that first leads to the reduction of MMP and the relaxation of chromatin, which is then ultimately followed by an increase in DNA fragmentation.