Deterioration of stored culture media as monitored by a sperm motility bioassay.
A hamster sperm motility bioassay was used to monitor medium quality during storage. The media studied were (1) TL-PVA, a modified Tyrode's solution; (2) TLP-PVA, a defined medium that supports hamster sperm motility but does not support capacitation; and (3) TALP-PVA (TLP-PVA + serum albumin), which supports hamster sperm survival and capacitation. Each medium was stored at 5 and -20 degrees C and tested every two weeks. All of the media deteriorated with increased storage time, but at different rates (TLP-PVA greater than TL-PVA greater than TALP-PVA). The deterioration of the media correlated with an increase in pH during storage, probably due to a loss of CO2 and bicarbonate. Albumin, added after storage, was able to rescue frozen TL-PVA.
Stewart-Savage
J
J
Department of Veterinary Science, University of Wisconsin, Madison 53706.
Bavister
B D
BD
D000818:Animals; D001681:Biological Assay; D006224:Cricetinae; D003470:Culture Media; D008297:Male; D013081:Sperm Motility
D003470:Culture Media