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Derar Derar - One of the best experts on this subject based on the ideXlab platform.

  • Antioxidant concentrations in serum, follicular fluid, and corpus luteum of cyclic buffalo cows
    Comparative Clinical Pathology, 2013
    Co-Authors: Hassan A. Hussein, Mahmoud R. Abd Ellah, Derar Derar
    Abstract:

    The present study was undertaken to evaluate antioxidant’s vitamins concentrations in serum, follicular fluid and corpus luteum of cyclic buffalo cows. A total of 34 clinically healthy buffalo cows ( Bubalus bubalis ), aged 8–10 years, were subjected to study. All animals were examined before slaughtering and the findings on the ovaries and the uterus were recorded. Blood samples and the whole genital tract of each animal were collected just after slaughtering. Antioxidants were measured in serum, CL and follicular fluid at different stage of the estrus cycle (proestrus n  = 8, estrus n  = 7, Metestrus n  = 7, and diestrus n  = 12). The results revealed significant increases in serum α-tocopherol concentration during Metestrus and diestrus stages ( p  

  • Antioxidant concentrations in serum, follicular fluid, and corpus luteum of cyclic buffalo cows
    Comparative Clinical Pathology, 2012
    Co-Authors: Hassan A. Hussein, Mahmoud R. Abd Ellah, Derar Derar
    Abstract:

    The present study was undertaken to evaluate antioxidant’s vitamins concentrations in serum, follicular fluid and corpus luteum of cyclic buffalo cows. A total of 34 clinically healthy buffalo cows (Bubalus bubalis), aged 8–10 years, were subjected to study. All animals were examined before slaughtering and the findings on the ovaries and the uterus were recorded. Blood samples and the whole genital tract of each animal were collected just after slaughtering. Antioxidants were measured in serum, CL and follicular fluid at different stage of the estrus cycle (proestrus n = 8, estrus n = 7, Metestrus n = 7, and diestrus n = 12). The results revealed significant increases in serum α-tocopherol concentration during Metestrus and diestrus stages (p < 0.05). On the other hand, there was a significant decrease (p < 0.05) in follicular ascorbic acid concentration at diestrus phase. Follicular β-carotene (p < 0.01) showed a significant increase at the Metestrus than at estrus and diestrus phases of the cycle. Follicular Vitamin A significantly increased (p < 0.01) at proestrus phase. Although during Metestrus there was significant decrease in the corpus hemorrhagicum weight (p < 0.01), ascorbic acid concentration was significantly increased (p < 0.05). In conclusion, the results of the present study suggested that serum α-tocopherol concentration increased during Metestrus and diestrus stages, follicular vitamin A increased in proestrus phases when regeneration and steroideogenesis are required. Ascorbic acid increased in diestrus phase to help corpus luteum to function properly.

Hassan A. Hussein - One of the best experts on this subject based on the ideXlab platform.

  • Antioxidant concentrations in serum, follicular fluid, and corpus luteum of cyclic buffalo cows
    Comparative Clinical Pathology, 2013
    Co-Authors: Hassan A. Hussein, Mahmoud R. Abd Ellah, Derar Derar
    Abstract:

    The present study was undertaken to evaluate antioxidant’s vitamins concentrations in serum, follicular fluid and corpus luteum of cyclic buffalo cows. A total of 34 clinically healthy buffalo cows ( Bubalus bubalis ), aged 8–10 years, were subjected to study. All animals were examined before slaughtering and the findings on the ovaries and the uterus were recorded. Blood samples and the whole genital tract of each animal were collected just after slaughtering. Antioxidants were measured in serum, CL and follicular fluid at different stage of the estrus cycle (proestrus n  = 8, estrus n  = 7, Metestrus n  = 7, and diestrus n  = 12). The results revealed significant increases in serum α-tocopherol concentration during Metestrus and diestrus stages ( p  

  • Antioxidant concentrations in serum, follicular fluid, and corpus luteum of cyclic buffalo cows
    Comparative Clinical Pathology, 2012
    Co-Authors: Hassan A. Hussein, Mahmoud R. Abd Ellah, Derar Derar
    Abstract:

    The present study was undertaken to evaluate antioxidant’s vitamins concentrations in serum, follicular fluid and corpus luteum of cyclic buffalo cows. A total of 34 clinically healthy buffalo cows (Bubalus bubalis), aged 8–10 years, were subjected to study. All animals were examined before slaughtering and the findings on the ovaries and the uterus were recorded. Blood samples and the whole genital tract of each animal were collected just after slaughtering. Antioxidants were measured in serum, CL and follicular fluid at different stage of the estrus cycle (proestrus n = 8, estrus n = 7, Metestrus n = 7, and diestrus n = 12). The results revealed significant increases in serum α-tocopherol concentration during Metestrus and diestrus stages (p < 0.05). On the other hand, there was a significant decrease (p < 0.05) in follicular ascorbic acid concentration at diestrus phase. Follicular β-carotene (p < 0.01) showed a significant increase at the Metestrus than at estrus and diestrus phases of the cycle. Follicular Vitamin A significantly increased (p < 0.01) at proestrus phase. Although during Metestrus there was significant decrease in the corpus hemorrhagicum weight (p < 0.01), ascorbic acid concentration was significantly increased (p < 0.05). In conclusion, the results of the present study suggested that serum α-tocopherol concentration increased during Metestrus and diestrus stages, follicular vitamin A increased in proestrus phases when regeneration and steroideogenesis are required. Ascorbic acid increased in diestrus phase to help corpus luteum to function properly.

H Okuda - One of the best experts on this subject based on the ideXlab platform.

  • The hormonal responses of lipoprotein lipase activity and lipolysis in adipose tissue differ depending on the stage of the estrous cycle in female rats
    International Journal of Obesity, 2002
    Co-Authors: M Yamaguchi, S Katoh, C Morimoto, K Sakayama, T Shiosaka, H Masuno, H Okuda
    Abstract:

    Objective: This study was designed to elucidate whether there were differences in the hormonal responses of the parameters involving triacylglycerol (TG) deposition and mobilization in adipose tissue among the stages of the estrous cycle in female rats. Measurements: Adipose tissue was obtained from the parametrial region in female rats at each stage of the estrous cycle. Lipoprotein lipase (LPL) activity in the extracts of acetone/ether powders of the tissues was measured as a parameter for TG deposition. Norepinephrine-stimulated lipolysis in isolated fat cells was measured as a parameter for TG mobilization. Results: LPL activity changed periodically during the estrous cycle; the activity level was highest at diestrus, began to decrease at proestrus, reached a minimum at estrus, began to increase again at Metestrus-1, and increased further at Metestrus-2. At diestrus and proestrus, LPL activity was increased with an increase in plasma insulin levels, suggesting that plasma insulin was the predominant up-regulator of LPL. But at estrus, Metestrus-1 and Metestrus-2, LPL activity remained low even when plasma insulin levels were high, indicating that it was not up-regulated by plasma insulin. Norepinephrine-stimulated lipolysis in fat cells was high at estrus and Metestrus-1 and low at diestrus. Conclusion: The hormonal responses of LPL activity and lipolysis in adipose tissue differed depending on the stage of the estrous cycle.

Kazuko Nishimura - One of the best experts on this subject based on the ideXlab platform.

  • Studies on the relationship between the estrous cycle of BALB/c mice and their resistance to Paracoccidioides brasiliensis infection
    Mycopathologia, 1992
    Co-Authors: Ayako Sano, Makoto Miyaji, Kazuko Nishimura
    Abstract:

    A relationship between the estrous cycle and non-specific host resistance to Paracoccidioides brasiliensis yeast cells was examined by using both sexes of adult BALB/c mice. They were divided into 6 groups, including a male group and females at proestrus, estrus, Metestrus-I, Metestrus-II and diestrus. The mice received yeast cells through three different inoculation routes; intravenous, intraperitoneal and intratracheal. In all of the inoculation routes, the clearance of the yeast cells was influenced by the estrous cycle. The female mice at estrus, which might have high blood estrogen levels, showed a marked clearance of the yeast cells from the blood, peritoneal cavity and lungs. These results suggested that non-specific host resistance to the yeast cells was enhanced by estrogen. All female groups inoculated by the three routes showed higher clearance of the yeast cells than the male group.

  • Studies on the relationship between paracoccidioidomycosis in ddY mice and their estrous cycle
    Mycopathologia, 1991
    Co-Authors: Ayako Sano, Makoto Miyaji, Kazuko Nishimura
    Abstract:

    The relationship between paracoccidioidomycosis in ddY mouse and its estrous cycle was studied. Adult ddY mice of both sexes were used as experimental animals. Estrous cycle of female mice was examined before inoculation of Paracoccidioides brasiliensis yeast cells and mice were divided into 5 groups such as proestrus, estrus, Metestrus-I, Metestrus-II and diestrus. Each mouse was inoculated intravenously with 10^6 P. brasiliensis yeast cell units and sacrificed on day 28 after inoculation. Their internal organs were cultured, and in addition, their histopathologies were studied. As a result, there was no difference in the organ cultures among the male and the female mice of 5 groups. However, histopathologically, the female groups at estrus, Metestrus-I and Metestrus-II were affected more severely than the male group, and the susceptibility of the female mice to the fungus was closely related to their estrous cycles.

  • Studies on the relationship between paracoccidioidomycosis in ddY mice and their estrous cycle
    Mycopathologia, 1991
    Co-Authors: Ayako Sano, Makoto Miyaji, Kazuko Nishimura
    Abstract:

    The relationship between paracoccidioidomycosis in ddY mouse and its estrous cycle was studied. Adult ddY mice of both sexes were used as experimental animals. Estrous cycle of female mice was examined before inoculation of Paracoccidioides brasiliensis yeast cells and mice were divided into 5 groups such as proestrus, estrus, Metestrus-I, Metestrus-II and diestrus. Each mouse was inoculated intravenously with 10^6 P. brasiliensis yeast cell units and sacrificed on day 28 after inoculation. Their internal organs were cultured, and in addition, their histopathologies were studied. As a result, there was no difference in the organ cultures among the male and the female mice of 5 groups. However, histopathologically, the female groups at estrus, Metestrus-I and Metestrus-II were affected more severely than the male group, and the susceptibility of the female mice to the fungus was closely related to their estrous cycles.

M Yamaguchi - One of the best experts on this subject based on the ideXlab platform.

  • The hormonal responses of lipoprotein lipase activity and lipolysis in adipose tissue differ depending on the stage of the estrous cycle in female rats
    International Journal of Obesity, 2002
    Co-Authors: M Yamaguchi, S Katoh, C Morimoto, K Sakayama, T Shiosaka, H Masuno, H Okuda
    Abstract:

    Objective: This study was designed to elucidate whether there were differences in the hormonal responses of the parameters involving triacylglycerol (TG) deposition and mobilization in adipose tissue among the stages of the estrous cycle in female rats. Measurements: Adipose tissue was obtained from the parametrial region in female rats at each stage of the estrous cycle. Lipoprotein lipase (LPL) activity in the extracts of acetone/ether powders of the tissues was measured as a parameter for TG deposition. Norepinephrine-stimulated lipolysis in isolated fat cells was measured as a parameter for TG mobilization. Results: LPL activity changed periodically during the estrous cycle; the activity level was highest at diestrus, began to decrease at proestrus, reached a minimum at estrus, began to increase again at Metestrus-1, and increased further at Metestrus-2. At diestrus and proestrus, LPL activity was increased with an increase in plasma insulin levels, suggesting that plasma insulin was the predominant up-regulator of LPL. But at estrus, Metestrus-1 and Metestrus-2, LPL activity remained low even when plasma insulin levels were high, indicating that it was not up-regulated by plasma insulin. Norepinephrine-stimulated lipolysis in fat cells was high at estrus and Metestrus-1 and low at diestrus. Conclusion: The hormonal responses of LPL activity and lipolysis in adipose tissue differed depending on the stage of the estrous cycle.