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Articles by S.M. Alavi-Shoushtari
Total Records ( 2 ) for S.M. Alavi-Shoushtari
  M. Eghbali , S.M. Alavi-Shoushtari and S. Asri Rezaii
  To investigate the effects of copper and superoxide dismutase (SOD) content of seminal plasma on buffalo semen characteristics, 54 semen samples collected from buffalo bulls by a bovine artificial vagina were used. Semen characteristics (motility, viability, morphology, concentration and volume) were recorded. Seminal plasma was harvested by centrifugation and kept frozen until analysis. Seminal plasma copper content was determined by atomic absorption procedure and SOD was measured by using a kit. The mean total copper value of seminal plasma was recorded as 2.51 ± 0.04 mg kg-1 (Mean ± SEM) and the mean total SOD values was 39.02 ± 0.81 IU mL-1. To reduce the range of variability, the data were categorized according to their motility records in 3 groups of Excellent (Ex, >90% motile, n = 33), Good (Go, 80-89% motile, n = 15) and Moderate (Mo, <79% motile, n = 6). The mean motility, viability, copper and SOD values in Ex group was recorded as 92.24 ± 0.51%, 94.00 ± 0.48%, 2.56 ± 0.04 mg kg-1 and 39.52 ± 0.57 IU mL-1, respectively. These values were 81.66 ± 0.62%, 85.26 ± 0.95%, 2.38 ± 0.11 mg kg-1 and 36.48 ± 1.51 IU mL-1 in Go group and 71.66 ± 1.05%, 77.00 ± 2.94%, 2.55 ± 0.10 mg kg-1 and 50.66 ± 2.51 in Mo group, respectively. The mean copper value in Ex group was highly (r = 0.600) correlated with SOD and correlated with sperm motility (r = 0.372) and viability (r = 0.363), while, in Go group it was highly correlated (r = 0.945) with SOD and sperm viability (r = 0.652) and in Mo group it was correlated (r = 0.874) with semen volume only. The mean SOD values in Ex group was highly correlated with sperm motility (r = 0.492) and viability (r = 0.490) and mean copper values, in Go group, it was highly correlated whit sperm viability (r = 0.659) and mean copper values and in Mo group it had no significant correlations with semen parameters. These results suggest that copper and SOD content of the buffalo seminal plasma have an influence on the sperm motility and viability which are the most important factors in semen fertility.
  S.M. Alavi-Shoushtari , S. Asri Rezai , M.H. Kh. Ansari and A. Khaki
  In order to determine zinc and catalase content of seminal plasma in the buffalo and to study their associations with the semen characteristics, 54 semen samples were collected from 10 buffalo bulls; semen volume and sperm concentration, gross and progressive motility and viability were evaluated, seminal plasma was then harvested by centrifugation and its zinc content was estimated by atomic absorption spectrophotometer and its catalase activity determined by using a commercial kit. The zinc content of the seminal plasma (Mean ± SEM) was recorded as 154.40 ± 1.74 mg L-1, while, the mean catalase value was 32.00 ± 0.42 U mL-1. The mean zinc values was highly correlated with sperm progressive motility and viability and with catalase values (p = 0.000 for all) and also was associated with gross motility (p = 0.020) and negatively with abnormal morphology (p = 0.049). The catalase values were highly associated with sperm progressive motility, viability and zinc content (p = 0.000 for all) and was associated with sperm gross motility (p = 0.024). For further clarification of these correlations, the samples were categorized in three groups of excellent (Ex, > 90% motile, n = 33), good (Go, 80-89% motile, n = 15) and moderate (Mo, < 79% motile, n = 6) according to their percentage of sperm motility. The mean progressive motility in Ex group was 92.54 ± 0.51%, in Go group was 81.66 ± 0.62% and in Mo group was 71.66 ± 1.05%. The mean zinc and catalase values were recorded as 161.07 ± 1.63 mg L-1 and 33.41 ± 0.34 U mL-1 in Ex, 146.70 ± 1.91 mg L-1 and 31.01 ± 0.67 in Go and 136.42 ± 4.97 mg L-1 and 26.51 ± 0.87 U mL-1 in Mo groups. The mean zinc value in Ex group was highly associated with sperm motility, viability and catalase values, in Go group was associated with catalase values and highly associated with sperm abnormal morphology and in Mo group it was highly associations with catalase values only. The mean catalase value in Ex group, was highly associated with sperm motility and viability, in Go group was associated with zinc content and in Mo groups was highly associated with the zinc content. These results show that seminal plasma zinc and catalase content are correlated with semen characteristics and synergistically act to preserve motility and viability of the spermatozoa after ejaculation.
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