Background In vitro fertilization （IVF） researches have suggested that cystathionine β synthase （CBS） is involved in oocyte development. However, little is known about the regional and cellular expression pattern...Background In vitro fertilization （IVF） researches have suggested that cystathionine β synthase （CBS） is involved in oocyte development. However, little is known about the regional and cellular expression patterns of CBS in the ovary. The purpose of this study was to analyze the localization of CBS in mice ovaries and to investigate the expression profile during follicular development. Methods We used in situ hybridization and immunohistochemical analysis to determine CBS expression in the ovaries of female Balb/c mice. Then the follicles were collected from F1 （C57BL×Balb/c） mice and cultured in vitro. With the method of semi-quantitative RT-PCR, we also investigated the expression profile of CBS during follicular development. Results CBS was absent in the oocytes, although it was ubiquitously expressed in the ovary with the strongest expression in follicular cells at all stages. In late antral follicles, CBS expression was markedly higher in granulosa cells located close to the antrum and in cumulus cells around the oocyte. The semi-quantitative RT-PCR showed that CBS mRNA was detected in follicles at all stages in vitro. In cumulus-oocyte complexes superovulated, CBS expression also increased rapidly. Conclusions CBS was located mainly in the follicular cells in the ovaries. The level of CBS expression is high in follicles during folliculogenesis in mice. Differences in the CBS expression profile between oocyte and follicular cells suggest a role for CBS as a mediator in interactions between oocyte and granulosa cells.展开更多
Objective To evaluate the prevalence of functional ovarian cysts in users of two different types of contraceptive implants. Methods A total of 239 women were enrolled at 3 months of use of the etonogestrelreleasing ...Objective To evaluate the prevalence of functional ovarian cysts in users of two different types of contraceptive implants. Methods A total of 239 women were enrolled at 3 months of use of the etonogestrelreleasing implant （Implanon） and the levonorgestrel-releasing implant （Jadelle）. Bimanual pelvic examination and vaginal ultrasound were performed during routine 3, 6 and 12-month visits of asymptomatic women（control group）. Women with ovarian cysts （or enlarged ovarian follicles 〉25 mm） （cysts group） were assessed weekly until disappearence or reduction of the image （including estradiol （E2） and progesterone measurement and women with no ovarian enlargement underwent same evaluation for the same period of time. Results Ovarian cysts were detected in 5.1% and 13.0% of users of Implanon and Jadelle, respectively, at 3rd month. At the 6th month of use, prevalences were 7.1% and 7.8%, and at 12th month rates were 25.7% and 14.7% in the two groups, respectively. E2 levels were significantly higher in cysts group than in control group. The time until disappearance of the ovarian cyst was similar in Implanon and Jadelle group. There were more cases of menorrhagia in patients rveth ovarian cysts than in patients with no ovarian enlargement. Conclusions The finding of ovarian cysts or enlarged ovarian follicles during the first year of use of Implanon and Jadelle implants is common and transient and should not be interpreted as a pathologic ovarian cyst. No further medical interventions are necessary.展开更多
Red Chittagong Cattle (RCC) is one of the renowned varieties of cattle which is indigenous and most potential type of domestic animal genetic resource in Bangladesh with distinct phenotypic characteristics. Reproducti...Red Chittagong Cattle (RCC) is one of the renowned varieties of cattle which is indigenous and most potential type of domestic animal genetic resource in Bangladesh with distinct phenotypic characteristics. Reproductive management might be a process for multiplying this cattle variety. Therefore, the goals of this study were to characterize the follicular waves of RCC and to determine the Progesterone (P4), Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH) profile during three consecutive estrus cycle. Follicular wave emergence (Day 0) was identified using trans-vaginal ultrasound technique and follicular growth was then monitored from Day 0 to Day 23 during three consecutive estrus cycle and blood samples were collected. After measuring the growth and diameter of the follicles, hormonal assays of collected blood samples were performed using Enzyme Linked Immunosorbent Assay (ELISA). We found that, both RCC cows and heifers showed two waves inter-ovulatory intervals. The length of inter-ovulatory intervals and the diameter of the ovulatory follicle of RCC cows and heifers were slightly different from each other. The identification of the dominant follicle was confirmed from the start of its deviation from other subordinate follicles till it reached to the maximum diameter and identified as dominant follicle which increases linearly for approximately six days (growing phase). This dominant follicle is remained approximately same size for five days (static phase), and then begins to regress (regressing phase) decreasing the antral diameter. The follicular waves are first detectable as 4 - 5 mm follicles approximately at day 0 and day 10 both for RCC cows and heifers which showed two waves inter-ovulatory intervals. The circulating varied concentrations of LH, FSH and P4 were determined using ELISA in case of both cows and heifers and the concentration curves followed the similar pattern of change during the estrus cycle. Hence, the knowledge about ovarian follicular waves will create a base line for r展开更多
Objective ：To investigate glucose metabolism in women with multiple ovarian follicles （MOF） and explore the relationship between glucose metabolism, insulin resistance and body weight. Methods：We evaluated 46 wome...Objective ：To investigate glucose metabolism in women with multiple ovarian follicles （MOF） and explore the relationship between glucose metabolism, insulin resistance and body weight. Methods：We evaluated 46 women with MFO and 30 normal women as controls. All the subjects were given 75g of glucose orally in order to perform the oral glucose tolerance test （OGTT） and insulin releasing test （IRT）, and they were also evaluated for insulin resistance using the insulin resistance index with homeostatic model assessment （HOMA）. Results：The occurrence of impaired glucose tolerance in women with MOF was 10.87%, which was significantly higher than that in the control group （3.33% ,P 〈 0.05）. The rate of insulin resistance was 30.43% in the study group as compared to 10.00% in the control group. The results showed that there was significant difference between the two groups（P 〈 0.05）. The levels of FSH,LH,PRL,E2,T and P between the two groups had no significant difference （P 〉 0.05）. BMI in women with impaired glucose tolerance was correlated positively to insulin resistance （r = 0.567, P 〈 0.05）. Conclusion：Abnormal glucose metabolism was observed in women with unitary multiple ovarian follicles, and this could be attributed to obesity and insulin resistance. Women with MOF and associated obesity should be subjected to OGTT so that their glucose levels can be monitored as a preventive measure.展开更多
基金supported by the National Natural Science Foundation of China(No.39260035)the Natural Science Foundation of Jiangxi Province+2 种基金China(No.0640052)the Training Program of Academic and Technical Leaders of Major Subjects of JiangxiProvinceChina
文摘本研究旨在探讨原癌基因c-erbB2在原始卵泡启动生长中的调控作用,及其在信号通路中与丝裂原活化蛋白激酶(mitogen-activated protein kinase,MAPK)和蛋白激酶C(protein kinaseC,PKC)的上下游关系。实验通过脂质体介导c-erbB2siRNA转染体外培养的卵巢,用RT-PCR法检测原癌基因c-erbB2 mRNA的表达,用Western blot检测ErbB2、MAPK和PKC蛋白的表达;用MAPK及PKC通路特异性抑制剂PD98059和Calphostin加入培养液中,培养卵巢8d后检测c-erbB2 mRNA及ErbB2蛋白的表达;HE染色进行卵泡启动生长组织学观察。结果显示,c-erbB2siRNA转染卵巢后,c-erbB2 mRNA水平明显下调(P<0.01),ErbB2、MAPK和PKC蛋白的表达也明显下调(P<0.01);而在培养液中加入特异性抑制剂PD98059和Calphostin,卵巢c-erbB2 mRNA的表达和ErbB2蛋白表达均无明显变化(P>0.05);与对照组比较,培养8d后siRNA组初级卵泡和次级卵泡数明显减少(P<0.01),抑制剂组原始卵泡数增多(P<0.01),次级卵泡数明显减少(P<0.05或P<0.01)。以上结果提示,c-erbB2可能是调控原始卵泡启动生长中的蛋白激酶MAPK和PKC的上游激活物。
基金This research was supported by a grant from the Special Funds for Major State Basic Research of China (No.2001CB510303).
文摘Background In vitro fertilization （IVF） researches have suggested that cystathionine β synthase （CBS） is involved in oocyte development. However, little is known about the regional and cellular expression patterns of CBS in the ovary. The purpose of this study was to analyze the localization of CBS in mice ovaries and to investigate the expression profile during follicular development. Methods We used in situ hybridization and immunohistochemical analysis to determine CBS expression in the ovaries of female Balb/c mice. Then the follicles were collected from F1 （C57BL×Balb/c） mice and cultured in vitro. With the method of semi-quantitative RT-PCR, we also investigated the expression profile of CBS during follicular development. Results CBS was absent in the oocytes, although it was ubiquitously expressed in the ovary with the strongest expression in follicular cells at all stages. In late antral follicles, CBS expression was markedly higher in granulosa cells located close to the antrum and in cumulus cells around the oocyte. The semi-quantitative RT-PCR showed that CBS mRNA was detected in follicles at all stages in vitro. In cumulus-oocyte complexes superovulated, CBS expression also increased rapidly. Conclusions CBS was located mainly in the follicular cells in the ovaries. The level of CBS expression is high in follicles during folliculogenesis in mice. Differences in the CBS expression profile between oocyte and follicular cells suggest a role for CBS as a mediator in interactions between oocyte and granulosa cells.
基金This study received partial financial support from the Fundaǎo de Amparo a Pesquisa do Estado de So Paulo (FAPESP), Brazil under award #03/083917.
文摘Objective To evaluate the prevalence of functional ovarian cysts in users of two different types of contraceptive implants. Methods A total of 239 women were enrolled at 3 months of use of the etonogestrelreleasing implant （Implanon） and the levonorgestrel-releasing implant （Jadelle）. Bimanual pelvic examination and vaginal ultrasound were performed during routine 3, 6 and 12-month visits of asymptomatic women（control group）. Women with ovarian cysts （or enlarged ovarian follicles 〉25 mm） （cysts group） were assessed weekly until disappearence or reduction of the image （including estradiol （E2） and progesterone measurement and women with no ovarian enlargement underwent same evaluation for the same period of time. Results Ovarian cysts were detected in 5.1% and 13.0% of users of Implanon and Jadelle, respectively, at 3rd month. At the 6th month of use, prevalences were 7.1% and 7.8%, and at 12th month rates were 25.7% and 14.7% in the two groups, respectively. E2 levels were significantly higher in cysts group than in control group. The time until disappearance of the ovarian cyst was similar in Implanon and Jadelle group. There were more cases of menorrhagia in patients rveth ovarian cysts than in patients with no ovarian enlargement. Conclusions The finding of ovarian cysts or enlarged ovarian follicles during the first year of use of Implanon and Jadelle implants is common and transient and should not be interpreted as a pathologic ovarian cyst. No further medical interventions are necessary.
文摘Red Chittagong Cattle (RCC) is one of the renowned varieties of cattle which is indigenous and most potential type of domestic animal genetic resource in Bangladesh with distinct phenotypic characteristics. Reproductive management might be a process for multiplying this cattle variety. Therefore, the goals of this study were to characterize the follicular waves of RCC and to determine the Progesterone (P4), Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH) profile during three consecutive estrus cycle. Follicular wave emergence (Day 0) was identified using trans-vaginal ultrasound technique and follicular growth was then monitored from Day 0 to Day 23 during three consecutive estrus cycle and blood samples were collected. After measuring the growth and diameter of the follicles, hormonal assays of collected blood samples were performed using Enzyme Linked Immunosorbent Assay (ELISA). We found that, both RCC cows and heifers showed two waves inter-ovulatory intervals. The length of inter-ovulatory intervals and the diameter of the ovulatory follicle of RCC cows and heifers were slightly different from each other. The identification of the dominant follicle was confirmed from the start of its deviation from other subordinate follicles till it reached to the maximum diameter and identified as dominant follicle which increases linearly for approximately six days (growing phase). This dominant follicle is remained approximately same size for five days (static phase), and then begins to regress (regressing phase) decreasing the antral diameter. The follicular waves are first detectable as 4 - 5 mm follicles approximately at day 0 and day 10 both for RCC cows and heifers which showed two waves inter-ovulatory intervals. The circulating varied concentrations of LH, FSH and P4 were determined using ELISA in case of both cows and heifers and the concentration curves followed the similar pattern of change during the estrus cycle. Hence, the knowledge about ovarian follicular waves will create a base line for r
文摘Objective ：To investigate glucose metabolism in women with multiple ovarian follicles （MOF） and explore the relationship between glucose metabolism, insulin resistance and body weight. Methods：We evaluated 46 women with MFO and 30 normal women as controls. All the subjects were given 75g of glucose orally in order to perform the oral glucose tolerance test （OGTT） and insulin releasing test （IRT）, and they were also evaluated for insulin resistance using the insulin resistance index with homeostatic model assessment （HOMA）. Results：The occurrence of impaired glucose tolerance in women with MOF was 10.87%, which was significantly higher than that in the control group （3.33% ,P 〈 0.05）. The rate of insulin resistance was 30.43% in the study group as compared to 10.00% in the control group. The results showed that there was significant difference between the two groups（P 〈 0.05）. The levels of FSH,LH,PRL,E2,T and P between the two groups had no significant difference （P 〉 0.05）. BMI in women with impaired glucose tolerance was correlated positively to insulin resistance （r = 0.567, P 〈 0.05）. Conclusion：Abnormal glucose metabolism was observed in women with unitary multiple ovarian follicles, and this could be attributed to obesity and insulin resistance. Women with MOF and associated obesity should be subjected to OGTT so that their glucose levels can be monitored as a preventive measure.
