title: Sephadex and sephadex ion-exchange filtration improves the quality and freezability of low-grade buffalo semen ejaculates.
abstract: The effect of sephadex and sephadex ion-exchange filtration on the improvement in quality and freezability of low-grade buffalo semen ejaculates was assessed. Two types of filtration columns were used: one containing only sephadex G-10 (FS) and the other sephadex G-10 along with ion-exchangers (diethyl amino ethane-52 (DEAE-52) cellulose and carboxy methyl-52 (CM-52) cellulose; FS+IE). Unfiltered samples served as controls. Semen ejaculates extended in Tris-citric acid (1:4) (n=16; initial motility 40-50%) were filtered at the rate of 1.5 ml/min under negative pressure at room temperature (28-30 degrees C). The mean recovery rate (%) of motile spermatozoa in the FS (85.9+/-1.51) and FS+IE (77.10+/-2.28) filtrates did not differ significantly. Percentages of sperm motility, normal acrosomes, and intact plasma membranes were highest (P<0.05) in FS+IE, intermediate (P<0.05) in FS and lowest (P<0.05) in controls at the three stages of cryopreservation (postfiltration final dilution, after equilibration, and after freezing). Mean sperm abnormalities were lowest (P<0.05) in the filtrates of FS+IE, moderate (P<0.05) in FS and highest in controls at all stages of freezing. Compared to dilution and equilibration, freezing greatly reduced (P<0.05) the overall percent motility, normal acrosomes and intact plasma membranes. The spermatozoa eluted through FS+IE columns proved more resistant (P<0.05) in bearing dilution, equilibration, freezing and thawing stresses than the spermatozoa from FS and control samples. It is concluded that filtration systems containing an FS+IE column can effectively enhance the quality and freezability of extended, low quality buffalo semen.
authors.affiliation: Animal Sciences Institute, National Agricultural Research Centre, Park Road, PO NIH, -45500, Islamabad, Pakistan.
authors.forename: Z
authors.initials: Z
authors.lastname: Ahmad
authors.forename: M
authors.initials: M
authors.lastname: Anzar
authors.forename: M
authors.initials: M
authors.lastname: Shahab
authors.forename: N
authors.initials: N
authors.lastname: Ahmad
authors.forename: S M H
authors.initials: SM
authors.lastname: Andrabi
mesh_terms: D000177:Acrosome / Q000502:physiology; D000818:Animals; D002020:Buffaloes / Q000502:physiology*; D002462:Cell Membrane / Q000502:physiology; D002850:Chromatography, Gel / Q000662:veterinary; D002852:Chromatography, Ion Exchange / Q000662:veterinary; D015925:Cryopreservation / Q000379:methods / Q000662:veterinary*; D008297:Male; D012662:Semen Preservation / Q000379:methods / Q000662:veterinary*; D013081:Sperm Motility / Q000502:physiology; D013094:Spermatozoa / Q000502:physiology*