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The experiments were conducted to evaluate the ability of different somatic-cell monolayers (human oviductal cells, granulose cells, MDBK-cells) for supporting motility and survival rates of human spermatozoa in-vitro. Results indicate that co-culture with epithelial cells enhanced human sperm longevity.
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The multicopy region on the long arm of the mouse Y chromosome contains four known genes. There are evidences that deletions in this region lead to decrease of sperm quality in mutant mice. Male mice completely lacking this region are infertile. Here we report results obtained by using the computer assisted semen analysis system (CASA), describing the movement parameters of spermatozoa from mutant males with partial deletion on the long arm of the Y chromosome (B10. BR-Y(del)). First we have determined that genes necessary for spermiogenesis and located in this region are still active in mutants, than we have compared the sperm movement of mutants and control animals. This analysis revealed that the Yq deletion affects: velocity parameters (VAP, VCL, VSL), parameters describing sperm head activity during movement (ALH and BCF) and linearity (LIN) of movement. Our findings indicate that sperm movement is controlled by genes located in the long arm of the Y chromosome.
We describe a new method for evaluating potential toxicants, spermicides, and motility enhancers. Cryopreservation straws filled with media plus additive are emersed below the surface of an unprocessed donor ejaculate. After incubation, the sperm found within the first 4 cm of the straw are expelled and analyzed. The effects of media containing glycerol and albumin were examined. Survivability and sperm migration into the media occur independently and can be differentiated in this assay. This method allows for the use of unprocessed semen and includes an evaluation of the semen and media interaction.
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