Some Effects of the Porcine Female Reproductive Tract on Metabolism of Boar Spermatozoa

Schul, G. A.; Foley, C. Michael; Heinze, Christoph; Erb, R.E.; Harrington, R. B.

doi:10.2527/jas1966.252406x

Cited by 4 publications

(1 citation statement)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The P/O ratios reported here are slightly lower than those reported by Morton and Lardy (23) for ejaculated bovine spermatozoa and Mohri, Mohri 2nd Ernester (31) for isolated midpieces of bovine spermatozoa. These results confirm the increase in oxygen uptake by porcine spermatozoa exposed to the reproductive tract fluids of the estrous sow (18) and indicate that the increase in oxygen uptake is paralleled by an increase in aerobic energy production. That is, the observed mean increase in oxygen uptake of approximately 29% is paralleled by an equal percentage increase in phosphorus uptake because the P/O ratios are not different.…”

supporting

confidence: 83%

Effect of Oviductal Fluids on Oxidative Phosphorylation in Spermatozoa

Stone

Foley

Thorne

et al. 1973

Experimental Biology and Medicine

Self Cite

View full text Add to dashboard Cite

The oviduct and its secretions provide the physiological environment in which spermatozoa of most mammalian species await the arrival of the ova. During this period, spermatozoa undergo a process called capacitation, a process that spermatozoa must undergo before achieving the capacity to fertilize ova (1, 2). Evidence that capacitation is indeed a necessary step in the fertilization process has been presented for the rabbit, rat, hamster, cat, ewe, frog, pig, cow, mouse and ferret (3-13). Dukelow and Chernoff (14) suggests that primate sperm also undergo capacitation.Although it has been shown that reproductive tract secretions increase sperm oxygen uptake (1 5-20) and motility (18), there is no direct evidence that these changes and the acquisition of the ability to fertilize ova are related. Mounib and Chang (16) have suggested, however, that capacitated sperm respire more rapidly and have increased aerobic glycolytic activity over freshly ejaculated sperm. Hamner and Williams (21) also reported in one study none of the eggs were fertilized by slowly respiring freshly ejaculated washed sperm, while 18% of the eggs were fertilized by rapidly respiring spermatozoa which had been incubated in utero. Also, it has been suggested by Iritani, Gomes and Van Demark (20) that the increased metabolic rate of spermatozoa incubated in the presence of female reproductive tract secretions is immediately relative to capacitation and irreversible with respect to washing. This suggested that the tract fluids, by increasing the metabolic rate, may have a

show abstract

supporting

confidence: 83%