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Meng J, Li Q, Xiao L, Liu W, Gao Z, Gong L, Lan X, Wang S. Immunization against inhibin DNA vaccine as an alternative therapeutic for improving follicle development and reproductive performance in beef cattle. Front Endocrinol (Lausanne) 2024; 14:1275022. [PMID: 38449672 PMCID: PMC10916279 DOI: 10.3389/fendo.2023.1275022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Accepted: 12/04/2023] [Indexed: 03/08/2024] Open
Abstract
The objective of the present study was to investigate the potential role of immunization against INH on follicular development, serum reproductive hormone (FSH, E2, and P4) concentrations, and reproductive performance in beef cattle. A total of 196 non-lactating female beef cattle (4-5 years old) with identical calving records (3 records) were immunized with 0.5, 1.0, 1.5, or 2.0 mg [(T1, n = 58), (T2, n = 46), (T3, n = 42) and (T4, n = 36), respectively] of the pcISI plasmid. The control (C) group (n = 14) was immunized with 1.0 mL 0.9% saline. At 21d after primary immunization, all beef cattle were boosted with half of the primary immunization dose. On day 10 after primary immunization, the beef cattle immunized with INH DNA vaccine evidently induced anti-INH antibody except for the T1 group. The T3 group had the greatest P/N value peak among all the groups. The anti-INH antibody positive rates in T2, T3 and T4 groups were significantly higher than that in C and T1 groups. RIA results indicated that serum FSH concentration in T2 group increased markedly on day 45 after booster immunization; the E2 amount in T3 group was significantly increased on day 10 after primary immunization, and the levels of E2 also improved in T2 and T3 groups after booster immunization; the P4 concentration in T2 group was significantly improved on day 21 after primary immunization. Ultrasonography results revealed that the follicles with different diameter sizes were increased, meanwhile, the diameter and growth speed of ovulatory follicle were significantly increased. Furthermore, the rates of estrous, ovulation, conception, and twinning rate were also significantly enhanced. These findings clearly illustrated that INH DNA vaccine was capable of promoting the follicle development, thereby improving the behavioral of estrous and ovulation, eventually leading to an augment in the conception rates and twinning rate of beef cattle.
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Affiliation(s)
- Jinzhu Meng
- College of Veterinary Medicine, Hunan Agricultural University, Changsha, China
- Guizhou Provincial Key Laboratory for Biodiversity Conservation and Utilization in the Fanjing Mountain Region, Tongren University, Tongren, China
| | - Qiuye Li
- College of Veterinary Medicine, Hunan Agricultural University, Changsha, China
| | - Lilin Xiao
- College of Veterinary Medicine, Hunan Agricultural University, Changsha, China
| | - Weichen Liu
- College of Veterinary Medicine, Hunan Agricultural University, Changsha, China
| | - Zhengjie Gao
- College of Veterinary Medicine, Hunan Agricultural University, Changsha, China
| | - Lin Gong
- College of Veterinary Medicine, Hunan Agricultural University, Changsha, China
| | - Xianyong Lan
- College of Animal Science and Technology, Northwest Agriculture and Forestry University, Yangling, China
| | - Shuilian Wang
- College of Veterinary Medicine, Hunan Agricultural University, Changsha, China
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Liu W, Chen Z, Li R, Zheng M, Pang X, Wen A, Yang B, Wang S. High and low dose of luzindole or 4-phenyl-2-propionamidotetralin (4-P-PDOT) reverse bovine granulosa cell response to melatonin. PeerJ 2023; 11:e14612. [PMID: 36684672 PMCID: PMC9851050 DOI: 10.7717/peerj.14612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 11/30/2022] [Indexed: 01/18/2023] Open
Abstract
Background Communication between oocytes and granulosa cells ultimately dictate follicle development or atresia. Melatonin is also involved in follicle development. This study aimed to investigate the effects of melatonin and its receptor antagonists on hormone secretion, as well as gene expression related to hormone synthesis, TGF-β superfamily, and follicle development in bovine granulosa cells, and assess the effects of melatonin in the presence of 4-P-PDOT and luzindole. Methods Bovine ovaries were collected from a local abattoir and follicular fluid (follicle diameter 5-8 mm) was collected for granulosa cell isolation and culture. Granulosa cells and culture medium were collected 48 h after treatment with melatonin at high dose concentrations (10-5 M) and low dose concentrations (10-9 M) in the absence/presence of 4-P-PDOT and luzindole (10-5 M or 10-9 M). Furthermore, the expression level of genes related to hormonal synthesis (CYP11A1, CYP19A1, StAR, and RUNX2), TGF-β superfamily (BMP6, INHA, INHBA, INHBB, and TGFBR3), and development (EGFR, DNMT1A, and FSHR) were detected in each experimental group by real-time quantitative PCR. In addition, the level of hormones in culture medium were detected using ELISA. Results Both 10-5 M and 10-9 M melatonin doses promoted the secretion of inhibin A and progesterone without affecting the production of inhibin B and estradiol. In addition, both promoted the gene expression of INHA, StAR, RUNX2, TGFBR3, EGFR, and DNMT1A, and inhibited the expression of BMP6, INHBB, CYP11A1, CYP19A1, and FSHR. When combined with different doses of 4-P-PDOT and luzindole, they exhibited different effects on the secretion of inhibin B, estradiol, inhibin A, and progesterone, and the expression of CYP19A1, RUNX2, BMP6, INHBB, EGFR, and DNMT1A induced by melatonin. Conclusion High and low dose melatonin receptor antagonists exhibited different effects in regulating hormone secretion and the expression of various genes in response to melatonin. Therefore, concentration effects must be considered when using luzindole or 4-P-PDOT.
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Affiliation(s)
- Wenju Liu
- College of Life and Health Science, Anhui Science and Technology University, Fengyang, China,Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, China
| | - Zhihao Chen
- College of Animal Science, Anhui Science and Technology University, Fengyang, China
| | - Rui Li
- College of Animal Science, Anhui Science and Technology University, Fengyang, China
| | - Menghao Zheng
- College of Animal Science, Anhui Science and Technology University, Fengyang, China
| | - Xunsheng Pang
- College of Animal Science, Anhui Science and Technology University, Fengyang, China
| | - Aiyou Wen
- College of Animal Science, Anhui Science and Technology University, Fengyang, China
| | - Bing Yang
- College of Animal Science, Anhui Science and Technology University, Fengyang, China
| | - Shujuan Wang
- College of Animal Science, Anhui Science and Technology University, Fengyang, China,Anhui Province Key Laboratory of Animal Nutritional Regulation and Health, Fengyang, China
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Ma L, Li Z, Ma Z, Ma J, Zhao F. Immunization Against Inhibin Promotes Fertility in Cattle: A Meta-Analysis and Quality Assessment. Front Vet Sci 2021; 8:687923. [PMID: 34621805 PMCID: PMC8490720 DOI: 10.3389/fvets.2021.687923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 08/13/2021] [Indexed: 12/09/2022] Open
Abstract
Superovulation and embryo transfer techniques are important methods in cattle breeding. Combined with traditional superovulation protocols, immunization against inhibin can further improve follicular development and embryo yield. The aim of this study is to determine the efficacy of immunization against inhibin in improving the fertility of cattle through meta-analysis and to provide better clinical veterinary practice guidance. Three English databases (PubMed, EMBASE, Web of Science) were searched for research articles of immunizations against inhibin influence on cattle fertility. Literature screening, data extraction, and meta-analysis were conducted in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. In addition, the Systematic Review Center for Laboratory animal Experimentation (SYRCLE) risk-of-bias (RoB) tool was used to assess the risk of bias of the included animal studies. Potentially relevant studies (317) were identified, and finally 14 eligible studies (all in English) were included. The results of meta-analysis revealed that immunization against inhibin has significant effects on improving the number of ovulations [mean difference (MD) = 0.44, 95% confidence interval (CI) = (0.31, 0.56)], embryos and unfertilized ova [MD = 4.51, 95% CI = (2.28, 6.74)], follicles of the three size categories, the incidence of multiple ovulations [OR = 22.50, 95% CI = (8.13, 62.27)], and the conception rate [OR = 2.36, 95% CI = (1.26, 4.40)]. Moreover, it improved the production of embryos [grades 1 embryos: MD = 3.84, (3.54, 4.15); grade 2 embryos: MD = -0.73, (-0.89, -0.57); grade 3 embryos: MD = -0.50, (-0.75, -0.25); degenerated embryos: MD = 1.16, (-0.51, 2.82); transferable embryos: MD = 2.67, (2.03, 3.31)] and the number of corpora lutea [MD = 1.25, 95% CI = (0.79, 1.71)]. In the above indicators, the differences between the two groups were statistically significant (all p < 0.0001). Additionally, according to the quality evaluation results, the risk of bias in the included studies is relatively high. The quality evaluation of the results of the included studies showed that the risk of bias mainly concentrated in the selective, performance, detection, and reporting of bias aspects.
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Affiliation(s)
- LingLi Ma
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, China.,College of Life Science and Engineering, Northwest Minzu University, Lanzhou, China
| | - Zhuo Li
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, China.,College of Life Science and Engineering, Northwest Minzu University, Lanzhou, China
| | - ZhongRen Ma
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, China.,College of Life Science and Engineering, Northwest Minzu University, Lanzhou, China
| | - JianBo Ma
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, China
| | - Fei Zhao
- Key Laboratory of Biotechnology and Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou, China.,Key Laboratory of Environmental Ecology and Population Health in Northwest Minority Areas, Medicine of Northwest Minzu University, Lanzhou, China
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Meguro K, Komatsu K, Ohdaira T, Nakagata N, Nakata A, Fukumoto M, Miura T, Yamashiro H. Induction of superovulation using inhibin antiserum and competence of embryo development in wild large Japanese field mice (Apodemus speciosus). Reprod Domest Anim 2019; 54:1637-1642. [PMID: 31587388 DOI: 10.1111/rda.13573] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 09/17/2019] [Accepted: 09/26/2019] [Indexed: 12/29/2022]
Abstract
Seasonally, bred wild mice provide a unique bioresource, with high genetic diversity that differs from wild-derived mice and laboratory mice. This study aimed to establish an alternative superovulation method using wild large Japanese field mice (Apodemus speciosus) as the model species. Specifically, we investigated how the application of inhibin antiserum and equine chorionic gonadotropin (IASe) during both the reproductive and non-reproductive seasons impact the ovulation rate and competence of embryo development after in vitro fertilization (IVF) with fresh and cryopreserved sperm. When the wild mice were superovulated by injecting eCG followed by human chorionic gonadotropin (hCG), few oocytes were collected during the reproductive and non-reproductive seasons. In comparison, the number of ovulated oocytes was dramatically enhanced by the administration of IASe, followed by isolation of ovulated oocytes 24 hr after 30 IU hCG administration. The IVF oocytes that were in vitro cultured (IVC) with medium containing serum further developed to the 2- and/or 4-cell stage using both fresh and frozen-thawed sperm. In conclusion, we successfully established an alternative protocol for collecting ovulated oocytes from wild large Japanese field mice by administering IASe and hCG during both the reproductive and non-reproductive seasons. This study is the first to develop IVF-IVC wild large Japanese field mice beyond the 2- and/or 4-cell stage in vitro using fresh and cryopreserved sperm. This approach could be used in other species of wild or endangered mice to reduce the number of animals used for experiments, or in maintaining stocks of germ cells or embryos.
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Affiliation(s)
- Kanna Meguro
- Graduate School of Science and Technology, Niigata University, Niigata, Japan
| | - Kazuki Komatsu
- Graduate School of Science and Technology, Niigata University, Niigata, Japan
| | - Takuya Ohdaira
- Graduate School of Science and Technology, Niigata University, Niigata, Japan
| | - Naomi Nakagata
- Center for Animal Resources and Development (CARD), Kumamoto University, Kumamoto, Japan
| | - Akifumi Nakata
- Division of Life Science, Hokkaido University of Science, Hokkaido, Japan
| | - Manabu Fukumoto
- Department of Molecular Pathology, Tokyo Medical University, Tokyo, Japan
| | - Tomisato Miura
- Department of Bioscience and Laboratory Medicine, Graduate School of Health Sciences, Hirosaki University, Hirosaki, Japan.,Department of Radiation Biology, Institute of Radiation Emergency Medicine, Hirosaki University, Hirosaki, Japan
| | - Hideaki Yamashiro
- Graduate School of Science and Technology, Niigata University, Niigata, Japan
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Seita Y, Iwatani C, Tsuchiya H, Nakamura S, Kimura F, Murakami T, Ema M. Poor second ovarian stimulation in cynomolgus monkeys (Macaca fascicularis) is associated with the production of antibodies against human follicle-stimulating hormone. J Reprod Dev 2019; 65:267-273. [PMID: 30842351 PMCID: PMC6584176 DOI: 10.1262/jrd.2018-156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Cynomolgus monkeys (Macaca fascicularis) are a valuable model organism for human disease modeling because human physiology and pathology are closer to those of cynomolgus
monkeys than rodents. It has been widely reported that mature oocytes can be recovered from cynomolgus monkeys through ovarian stimulation by human follicle-stimulating hormone (hFSH).
However, it is unknown whether mature oocytes can be effectively obtained through a second ovarian stimulation by hFSH. Here, we report that some ovaries (eight ovaries from 14 female
monkeys) were stimulated effectively by hFSH even after the first ovum pick up, whereas the others were stimulated poorly by hFSH. Furthermore, we found antibodies against hFSH only in the
serum of female monkeys with poorly stimulated ovaries. Collectively, these data suggest that anti-hFSH antibodies in serum may cause a poor ovarian response to hFSH stimulation. Finally,
detection of such antibodies as well as observation of the ovary over the course of hFSH administration might be useful to predict favorable second ovarian stimulation by hFSH.
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Affiliation(s)
- Yasunari Seita
- Department of Stem Cells and Human Disease Models, Research Center for Animal Life Science, Shiga University of Medical Science, Shiga 520-2192, Japan
| | - Chizuru Iwatani
- Department of Stem Cells and Human Disease Models, Research Center for Animal Life Science, Shiga University of Medical Science, Shiga 520-2192, Japan
| | - Hideaki Tsuchiya
- Department of Stem Cells and Human Disease Models, Research Center for Animal Life Science, Shiga University of Medical Science, Shiga 520-2192, Japan
| | - Shinichiro Nakamura
- Department of Stem Cells and Human Disease Models, Research Center for Animal Life Science, Shiga University of Medical Science, Shiga 520-2192, Japan
| | - Fuminori Kimura
- Department of Obstetrics and Gynecology, Shiga University of Medical Science, Shiga 520-2192, Japan
| | - Takashi Murakami
- Department of Obstetrics and Gynecology, Shiga University of Medical Science, Shiga 520-2192, Japan
| | - Masatsugu Ema
- Department of Stem Cells and Human Disease Models, Research Center for Animal Life Science, Shiga University of Medical Science, Shiga 520-2192, Japan.,Institute for the Advanced Study of Human Biology (ASHBi), Kyoto University, Kyoto 606-8501, Japan
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The Mechanism of Melatonin and Its Receptor MT2 Involved in the Development of Bovine Granulosa Cells. Int J Mol Sci 2018; 19:ijms19072028. [PMID: 30002300 PMCID: PMC6073438 DOI: 10.3390/ijms19072028] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Revised: 06/28/2018] [Accepted: 07/07/2018] [Indexed: 01/20/2023] Open
Abstract
Ovarian granulosa cells (GCs) are a critical approach to investigate the mechanism of gene regulation during folliculogenesis. The objective of this study was to investigate the role of MT2 in bovine GCs, and assess whether MT2 silencing affected GCs response to melatonin. We found that MT2 silencing significantly decreased the secretion of progesterone and estradiol, and increased the concentration of inhibin B and activin B. To further reveal the regulatory mechanism of MT2 silencing on steroids synthesis, it was found that the expression of CYP19A1 and CYP11A1 enzymes (steroid hormone synthesis) were down-regulated, while genes related to hormonal synthesis (StAR, RUNX2, INHA and INHBB) were up-regulated without affecting the expression of INHBA, suggesting that MT2 silencing may regulate hormone abundance. Furthermore, MT2 silencing significantly increased the expression of TGFBR3 and BMP6, and decreased the expression of LHR and DNMT1A without significant difference in the expression of FSHR and EGFR. In addition, MT2 silencing didn’t affect the effect of melatonin on increasing the expression of DNMT1A, EGFR, INHBA and LHR, and progesterone level, or decreasing INHA, TGFBR3 and StAR expression, and production of inhibin B. Moreover, MT2 silencing could disrupt the role of melatonin in decreasing the FSHR, INHBB and BMP6 expression, and activin B secretion. In conclusion, these results reveal that melatonin and MT2 are essential regulator of bovine GCs function by modulating reproduction-related genes expression, hormones secretion and other regulators of folliculogenesis.
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Al-Sa'aidi JAA, Khudair KK, Khafaji SS. Reproductive fecundity of Iraqi Awassi ewes immunized against synthetic inhibin-α subunit or steroid-free bovine follicular fluid. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2018. [PMID: 29514448 PMCID: PMC6043455 DOI: 10.5713/ajas.17.0660] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Objective The present study was conducted to investigate the impacts of active and passive immunization against synthetic inhibin and steroid-free bovine follicular fluid, respectively, on reproductive fecundity out of breeding season in Iraqi Awassi ewes. Methods Follicular fluid was aspired from mature bovine follicles, treated with activated charcoal, and used for immunization of male rabbits for obtaining steroid free bovine follicular fluid (SFBFF) antiserum. Forty non-pregnant Awassi ewes were allocated into 4 groups (n = 10 each). At day 38 of experiment, ewes were treated with intra-vaginal MPA sponge (60 mg for 12 days). At days 0, 28, and 50, ewes were treated with 4, 2, and 2 mL of normal saline (control; C-ve), 400, 200, and 200 μg of ovalbumin (C+ve), 400, 200 and 200 μg of inhibin (SI group), respectively, and 4 mL of normal saline at day 0, and 4 and 2 mL of SFBFF antiserum at days 28 and 50, respectively, (AI group). After mating with Awassi rams, pregnancy and embryo number were diagnosed, at day 38 of pregnancy, using ultrasonography. Blood samples were collected at days 30, 60, 90, and 120 of pregnancy, for assessment of estradiol-17β (E2) and progesterone (P4) levels. After parturition, numbers of delivered lambs were recorded. Results The results revealed significant increase of P4 and significant decrease of E2 levels in SI and AI pregnant ewes than controls at days 30, 60, 90, and 120. Newborn number increased significantly in SI and AI treated than control ewes. Conclusion Active or passive immunization against endogenous inhibin could augment reproductive fecundity out of breeding season in Iraqi Awassi ewes.
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Affiliation(s)
| | - Khalisa Khadim Khudair
- Department of Physiological, Pharmacology and Biochemistry, College of Veterinary Medicine, University of Baghdad, 10, Iraq
| | - Sura Safi Khafaji
- Department of Animal Production, College of Agriculture, University of Kerbala, 56, Iraq
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8
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Effects of silencing INHα gene by RNAi on the mRNA expressions of StAR, FST, INHβB, and FSHR genes in cultured sheep granulosa cells. Small Rumin Res 2017. [DOI: 10.1016/j.smallrumres.2017.10.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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9
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Wang SJ, Liu WJ, Wang LK, Pang XS, Yang LG. The role of Melatonin receptor MTNR1A in the action of Melatonin on bovine granulosa cells. Mol Reprod Dev 2017; 84:1140-1154. [DOI: 10.1002/mrd.22877] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 08/04/2017] [Indexed: 12/12/2022]
Affiliation(s)
- Shu-Juan Wang
- Anhui Science and Technology University; Fengyang Anhui China
| | - Wen-Ju Liu
- Anhui Science and Technology University; Fengyang Anhui China
| | - Li-Ke Wang
- Anhui Science and Technology University; Fengyang Anhui China
| | - Xun-Sheng Pang
- Anhui Science and Technology University; Fengyang Anhui China
| | - Li-Guo Yang
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education; Huazhong Agriculture University; Wuhan Hubei China
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Lei M, Cai L, Li H, Chen Z, Shi Z. Transcriptome sequencing analysis of porcine granulosa cells treated with an anti-inhibin antibody. Reprod Biol 2017; 17:79-88. [DOI: 10.1016/j.repbio.2017.01.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 12/29/2016] [Accepted: 01/02/2017] [Indexed: 12/23/2022]
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Rateb SA, El-Bahrawy KA, Khalifa MA. The prolonged reproductive response to immunization against inhibin and manipulating ovarian hyperactivity for timed ovulation in camels. Small Rumin Res 2016. [DOI: 10.1016/j.smallrumres.2016.03.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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12
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Yan L, Li H, Shi Z. Immunization against inhibin improves in vivo and in vitro embryo production. Anim Reprod Sci 2015; 163:1-9. [DOI: 10.1016/j.anireprosci.2015.11.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 10/29/2015] [Accepted: 11/01/2015] [Indexed: 01/01/2023]
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13
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Rateb S, Khalifa M, El-Bahrawy K. The influence of active immunization against inhibin on dromedary camel ovarian and hormonal dynamics. Small Rumin Res 2015. [DOI: 10.1016/j.smallrumres.2015.10.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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14
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M'baye M, Hua G, Khan HA, Yang L. RNAi-mediated knockdown of INHBB increases apoptosis and inhibits steroidogenesis in mouse granulosa cells. J Reprod Dev 2015; 61:391-7. [PMID: 26063610 PMCID: PMC4623144 DOI: 10.1262/jrd.2014-158] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Inhibins are members of the TGFβ superfamily and act as suppressors
of follicle stimulating hormone (FSH) secretion from pituitary glands
via a negative feedback mechanism to regulate folliculogenesis. In
this study, the INHBB gene was knocked down by three
RNAi-Ready pSIREN-RetroQ-ZsGreen vector- mediated recombinant plasmids
to explore the effects of INHBB silencing on
granulosa cell (GC) cell cycle, apoptosis and steroid production
in vitro. Quantitative real-time polymerase chain
reaction, Western blot, flow cytometry and ELISA were performed to
evaluate the role of INHBB in the mouse GC cell
cycle, apoptosis and steroid production in vitro. The
results showed that the relative mRNA and protein expression of
INHBB in mouse GCs can be significantly reduced by
RNAi with pshRNA-B1, pshRNA-B2 and pshRNA-B3 plasmids, with pshRNA-B3
having the best knockdown efficiency. Downregulation of the expression
of INHBB significantly arrests cells in the G1 phase
of the cell cycle and increases the apoptosis rate in GCs. This was
further confirmed by downregulation of the protein expressions of
Cyclin D1, Cyclin E and Bcl2, while the protein expression of Bax was
upregulated. In addition, specific downregulation of
INHBB markedly decreased the concentration of
estradiol and progesterone, which was further validated by the
decrease in the mRNA levels of CYP19A1and
CYP11A1. These findings suggest that inhibin βB is
important in the regulation of apoptosis and cell cycle progression in
granulosa cells. Furthermore, the inhibin βB subunit has a role in the
regulation of steroid hormone biosynthesis. Evidence is accumulating
to support the concept that inhibin βB is physiologically essential
for early folliculogenesis in the mouse.
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Affiliation(s)
- Mohamed M'baye
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Animal Science & Technology, Huazhong Agricultural University, Wuhan 430070, PR China
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Liu Y, Mao X, Wei Y, Yu J, Li H, R.A.Chen, Shi Z. Studies on enhancing embryo quantity and quality by immunization against inhibin in repeatedly superovulated Holstein heifers and the associated endocrine mechanisms. Anim Reprod Sci 2013; 142:10-8. [DOI: 10.1016/j.anireprosci.2013.08.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Revised: 08/06/2013] [Accepted: 08/08/2013] [Indexed: 11/30/2022]
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16
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Ganguly A, Meur SK, Ganguly I. Changes in circulatory FSH of Barbari goats following treatment with high molecular weight inhibin isolated from buffalo follicular fluid. Res Vet Sci 2013; 95:374-80. [PMID: 23602073 DOI: 10.1016/j.rvsc.2013.03.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Revised: 01/03/2013] [Accepted: 03/17/2013] [Indexed: 11/17/2022]
Abstract
The objective of the present study was to isolate and purify high MW inhibin (≈ 129 kDa) from buffalo ovarian follicular fluid (buFF) and to investigate its biological activity. Throughout the process of purification, the inhibin fractions were evaluated for bioactivity by a specific, sensitive and uniformly reproducible bioassay in mice. The final biological activity of this preparation was tested in normal cycling adult female Barbari goats. Eight animals, randomly divided into two groups, were synchronized for estrus by administering PGF2α twice at an interval of ten days. Following synchronization, the treatment group (n=4) received (i.m.) 0.4 ml (240 μg protein total dose) of purified inhibin (MW ≈ 129 kDa) of buFF in the morning at 08.00 h for the four consecutive days of follicular phase, while the control group (n=4) received only saline (0.4 ml). Blood samples were collected from jugular vein immediately before the first injection and subsequent collections were made daily in the afternoon until day 8 of the experiment including four days (0, 1, 2, & 3 days) of the next cycle. FSH was assayed in all the samples by ELISA. The peripheral FSH concentration sharply declined from 1.854±0.137 to 0.979 ± 0.02 u/l, 8h after the administration of inhibin on the first day. The value in controls was 2.004 ± 0.132 u/l. For the duration of treatment of four consecutive days, the FSH level in experimental group remained significantly low (p<0.05) compared to control group. After cessation of treatment, the FSH level remained low on day 0 and 1 of the next cycle in the experimental and control animals. However, a significant rebound increase in plasma FSH levels occurred on day 2 & 3 (2.73 ± 0.179 & 1.849 ± 0.128 u/l) only in the experimental group compared to control animals (P<0.05). This increment might be caused by the rebound surge of FSH from anterior pituitary which further corroborates the effect of inhibin in treated animals. In conclusion, the present study demonstrates that the high MW form of inhibin (≈ 129 kDa) isolated from buFF has comparable biological activity as revealed by 31-32 kDa inhibin from other species.
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Affiliation(s)
- Anita Ganguly
- Division of Biochemistry and Food Science, Indian Veterinary Research Institute, Izatnagar, Bareilly, UP 243122, India.
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Ali MS, Khandoker MAMY, Afroz MA, Bhuiyan AKFH. Ovarian Response to Different Dose Levels of Follicle Stimulating Hormone (FSH) in Different Genotypes of Bangladeshi Cattle. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2012; 25:52-8. [PMID: 25049478 PMCID: PMC4092915 DOI: 10.5713/ajas.2011.11167] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2011] [Accepted: 10/17/2011] [Indexed: 11/27/2022]
Abstract
The experiment was conducted under the Department of Animal Breeding and Genetics, Bangladesh Agricultural University (BAU), Mymensingh from June, 2001 to December, 2005 in two different locations (Central Cattle Breeding and Dairy Farm and Bangladesh Livestock Research Institute in Savar, Dhaka) to observe ovarian response to different doses of FSH in three different genotypes of cattle- indigenous Local, Pabna cattle and Friesian×Local cross. Five different dose levels used were 200, 240, 280, 320 and 360 mg. Ovarian response as corpus luteum (CL), recovered embryo (RE) and of transferable embryos (TE) count in Local were significant for 320, 280 and 280 mg respectively. In Pabna cattle CL, RE and TE count were found significant for 360, 320 and 320 mg respectively. In Friesian×Local cross CL, RE and TE count were found significant for 360, 320 and 320 mg respectively. The excellent quality embryos showed significantly the highest yield (1.80±0.20) in the 240 and 280 mg FSH levels in Local genotype. In Pabna cattle, the highest yield (2.00±0.32) was found at FSH level 320 mg. In Friesian×Local, the highest yield (2.20±0.20) was found at FSH level 280 mg.
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Holtz W, Wang X, El-Gayar M, Knight PG. The effect of exogenous gonadotropins on ovarian function in goats actively immunized against inhibin. Theriogenology 2011; 77:253-9. [PMID: 21924477 DOI: 10.1016/j.theriogenology.2011.07.037] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2011] [Revised: 07/03/2011] [Accepted: 07/22/2011] [Indexed: 10/17/2022]
Abstract
The aim of this investigation was to compare the ovarian response to superovulatory treatments in does before and after inhibin immunization, with a view to optimizing the superovulatory potential of the caprine ovary. To avoid interference by the ovarian cycle, the experiment was conducted out-of-season. At the onset of the experiment 48 does were subjected to treatment with an sc implant of the progestogen norgestomet, combined with a gonadotropin; eight does each received a single injection of 1200 IU eCG, 400 IU eCG or 2 mL physiological saline (control) or six injections (at 12 h intervals) constituting 16 or 5.4 AU pFSH. The does were mated and subjected to embryo collection 6 to 7 d later. Throughout the experiment ovarian function (by ultrasonography) and plasma levels of inhibin antibodies and progesterone were monitored. Of 40 does treated during the first part of the experiment, 48% showed estrus. The ovarian response in does treated with a high or low dose of eCG or a low dose of pFSH was barely in excess of the ovarian response in the saline-treated controls, whereas a superovulatory dose of pFSH (16 AU) gave a satisfactory response of, on average, 14.5 ovulations (yielding 8.8 flushed ova and embryos). Immediately after the does had been subjected to embryo collection they were actively immunized against inhibin by administering two injections of a recombinant α-subunit of ovine inhibin at four week intervals. All immunized does produced antibodies with the maximal titer reached two weeks after the second injection. Groups of immunized does were subjected to the same gonadotropin treatments as before (avoiding allocation of individuals to the same treatments). This time all does showed estrous symptoms. The ovulatory response to the various treatments, including the saline controls, was virtually identical, the overall average being 21.8 follicles and 9.1 ovulations. The average embryo yield per doe was 5.7. The results imply that inhibin acted as the key factor in determining the ovulatory response since no impact of any of the supplementary gonadotropins was noted in inhibin-immunized does. This finding gives rise to the notion that inhibin antibodies may act primarily by an intraovarian paracrine action rather than by reducing the suppressive action of inhibin on pituitary FSH release. Further, these findings confirm earlier reports that eCG is less suitable than FSH for inducing superovulation in goats, and indicate that active immunization against inhibin may be considered a viable alternative to using exogenous gonadotropin for inducing superovulation in goats.
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Affiliation(s)
- W Holtz
- Department of Animal Science, Georg-August-University Goettingen, Goettimngen, Germany.
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Tang KQ, Li SJ, Yang WC, Yu JN, Han L, Li X, Yang LG. An MspI polymorphism in the inhibin alpha gene and its associations with superovulation traits in Chinese Holstein cows. Mol Biol Rep 2010; 38:17-21. [PMID: 20238172 DOI: 10.1007/s11033-010-0072-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2009] [Accepted: 03/05/2010] [Indexed: 10/19/2022]
Abstract
To identify a predictor to forecast superovulation response on the basis of associations between superovulation performance and gene polymorphism, the PCR-RFLP method was applied to detect an A>G transition determining an MspI polymorphism at position 192 in the exon I of the bovine inhibin alpha (INHA) gene and evaluate its associations with superovulatory response in 118 Chinese Holstein cows treated for superovulation. Association analysis showed that cows with the GG genotype resulted in a significant increase in the number of ova (TNO) than AG and AA genotypes in the first (P=0.023), second (P=0.004) and third (P=0.002) superovulation treatments and produced more transferable embryos (NTE) than that of AG and AA genotypes in the third (P=0.045) superovulation treatment. Moreover, individuals with GG genotype produced more transferable embryos than AA (P<0.05) genotype in the second superovulation treatment and all cows without superovulation response were mutations with genotypes of AA and AG. These results indicate that INHA gene can be used as a predictor for superovulation in Chinese Holstein cows, and imply that cows with AA genotype should be excluded for superovulation practices.
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Affiliation(s)
- Ke-Qiong Tang
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China
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Li C, Zhu YL, Xue JH, Zhang SL, Ma Z, Shi ZD. Immunization against inhibin enhances both embryo quantity and quality in Holstein heifers after superovulation and insemination with sex-sorted semen. Theriogenology 2009; 71:1011-7. [PMID: 19144396 DOI: 10.1016/j.theriogenology.2008.11.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2008] [Revised: 10/18/2008] [Accepted: 11/14/2008] [Indexed: 10/21/2022]
Abstract
The objective was to investigate the feasibility of improving embryo yield in superovulated cows following insemination with sex-sorted semen by prior immunization against inhibin. Twenty-eight heifers were allocated into three groups: High (n=10), Low (n=10), and Control (n=8). The High group received one primary (1mg) and two booster (0.5mg) vaccinations (28-d intervals) with a recombinant inhibin alpha-subunit in 1 mL of white oil adjuvant, whereas the Low group received half that dose, and the Control group received only adjuvant. After the last immunization, all heifers underwent a standard superovulation treatment (decreasing doses of pFSH for 4d), followed by two AI with 2 x 10(6) sex-sorted semen after the onset of estrus. Inhibin-immunized heifers had higher (P<0.01) plasma antibody titres, and an earlier onset of estrus (P<0.05) than Control heifers. The total number of embryo/ova, transferable, and grade 1 embryos in the High group (15.4+/-1.9, 5.7+/-0.7, and 3.8+/-1.0, respectively) was significantly greater than that of the Control group (9.1+/-1.2, 3.1+/-0.5, and 0.6+/-0.2), but was intermediate (P>0.05) in the Low group (13.0+/-2.3, 4.4+/-0.7, and 1.2+/-0.3). There were no significant differences among groups in number of unfertilized ova and degenerated embryos. The High group also had higher (P>0.05) plasma progesterone concentrations on the day of embryo collection. In conclusion, immunization against inhibin improved both embryo quantity and quality following superovulation and insemination with sex-sorted semen.
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Affiliation(s)
- C Li
- Department of Animal Science, South China Agricultural University, Guangzhou 510642, China
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Besenfelder U, Havlicek V, Moesslacher G, Gilles M, Tesfaye D, Griese J, Hoelker M, Maddox Hyttel P, Laurincik J, Brem G, Schellander K. Endoscopic Recovery of Early Preimplantation Bovine Embryos: Effect of Hormonal Stimulation, Embryo Kinetics and Repeated Collection. Reprod Domest Anim 2008; 43:566-72. [DOI: 10.1111/j.1439-0531.2007.00953.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Wang XL, El-Gayar M, Knight PG, Holtz W. The long-term effect of active immunization against inhibin in goats. Theriogenology 2008; 71:318-22. [PMID: 18762330 DOI: 10.1016/j.theriogenology.2008.07.024] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2008] [Revised: 07/16/2008] [Accepted: 07/25/2008] [Indexed: 10/21/2022]
Abstract
This experiment addresses the long-term effect of active immunization of goats against a recombinant ovine inhibin alpha subunit (roIHN-alpha). In late anestrus 100microg of roINH-alpha was administered to 40 pluriparous Boer goat does, followed, 4 weeks later, by a booster injection. Weekly blood samples were drawn to monitor the inhibin binding capacity with the aid of a radio-tracer binding assay. From the onset until 48h after the end of each estrus, follicular development and ovulation rate were monitored at 24h intervals by transrectal ultrasonography. Beginning in August and continuing into January, does were mated at every other estrus, and submitted to transcervical embryo collection. Seven months after the first immunization, the does were mated again and permitted to carry to term. All immunized does produced inhibin antibodies, an elevated titre being first detected 2 weeks after primary immunization. Maximum titres were reached after 6 weeks, i.e. 2 weeks after the booster injection. Thereafter, in the course of the following 32 weeks, the titre subsided gradually. The does started cycling by mid-August. At that stage the average number of follicles more than 4mm in diameter, ovulations and total embryos and ova recovered were 14.7 (+/-2.3), 5.3 (+/-0.7) and 4.4 (+/-1.0), respectively. A steady decline followed and in January the corresponding means were: 5.2 (+/-0.6) follicles, 3.1 (+/-0.6) ovulations and 1.2 (+/-0.4) embryos and ova recovered. When mated toward the end of the breeding season, 85% of the does became pregnant to the first mating and 73% went to term. Healthy kids were born, the average litter size being 2.2 (+/-0.1). In conclusion, immunization of goats against a recombinant inhibin alpha-subunit proved to be a practicable means of producing embryos for transfer purposes. After about half a year, when the inhibin antibody titre has subsided, it is possible to return the does to the breeding flock without risking complications with normal breeding activity.
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Affiliation(s)
- X L Wang
- Institute of Animal Husbandry and Genetics, University of Goettingen, Albrecht-Thaer-Weg 3, 37075 Goettingen, Germany
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Mei C, Li MY, Zhong SQ, Lei Y, Shi ZD. Enhancing embryo yield in superovulated holstein heifers by immunization against inhibin. Reprod Domest Anim 2008; 44:735-9. [PMID: 18694421 DOI: 10.1111/j.1439-0531.2008.01061.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Eight heifers, aged 16-17 months and showing normal oestrous cycles, were immunized against a recombinant porcine inhibin alpha subunit immunogen, together with another 10 heifers of the same age as controls and treated with placebo immunogen. Primary (1 mg immunogen) and two booster (0.5 mg immunogen each) immunizations were administered at 28-day intervals. Ten days after the second booster immunization, both groups of heifers underwent a superovulation treatment. Each animal was given an intravaginal progesterone releasing sponge, which was withdrawn 7 days following an i.m. injection of 0.5 mg cloprostenol. Heifers were treated with FSH for 4 days and artificially inseminated after oestrus occurred. The embryos were flushed and evaluated 7 days after insemination. Immunization significantly (p < 0.01) increased blood antibody titres against recombinant porcine inhibin alpha subunit, from pre-immunizaion and control values of approximately 0.06 of ELISA 450 nm reading to 0.6 to 0.7 after two or three immunizations. The immunized heifers produced on average 15.8 +/- 2.8 embryos, significantly (p < 0.05) higher than the yield of 8.3 +/- 1.5 in the controls. The number of transferable embryos were non-significantly higher in immunized than in control heifers (9.6 +/- 3.1 vs 5.8 +/- 1.6, p > 0.05). The peak plasma oestradiol concentrations were significantly higher in immunized than in control heifers, both immediately after FSH treatment and 20 days thereafter. Plasma P4 concentrations after superovulation were in the range of 20 ng / ml in the immunized heifers, significantly (p < 0.05) higher than the values approximately 15 ng / ml in control heifers. These results indicated that prior immunization against inhibin alpha subunit stimulated production of antibodies against inhibin, which enhanced follicular developmental response to superovulation and lead to higher yield of total and transferable embryos. Therefore immunization combined with the conventional superovulatory gonadotrophin treatment, can be a simple and efficient method to produce low cost bovine embryos.
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Affiliation(s)
- C Mei
- Department of Animal Science, South China Agricultural University, Guangzhou, China
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MEDAN MS, ARAI KY, WATANABE G, TAYA K. Inhibin: Regulation of reproductive function and practical use in females. Anim Sci J 2007. [DOI: 10.1111/j.1740-0929.2006.00399.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Zambrano-Varón J, BonDurant R. Reproductive endocrine profiles and follicular growth after estrus induction in the riverine water buffalo ( Bubalus bubalis, 2n=50) and riverine-swamp hybrid buffalo (2n = 49). ITALIAN JOURNAL OF ANIMAL SCIENCE 2007. [DOI: 10.4081/ijas.2007.s2.622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Meng C, Shi F, Zhou Z, Huang R, Liu G, Watanabe G, Taya K. Cellular Localization of Inhibin alpha-subunit, PKB/Akt and FoxO3a proteins in the ovaries of minipigs. J Reprod Dev 2006; 53:229-36. [PMID: 17132910 DOI: 10.1262/jrd.18078] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Experiments were conducted to examine the cellular localization of inhibin alpha-subunit, protein kinase B (PKB/Akt), and FoxO3a proteins in the ovaries of minipigs, Chinese Xiang pigs, by immunohistochemistry. The results indicated that inhibin alpha-subunits were localized in the granulosa cells of follicles at all stages but were not localized in corpora lutea. PKB was localized in the granulosa cells of primordial follicles and in the basal layers of the granulosa cells of preantral and antral follicles, but were not localized in atretic follicles and corpora lutea. FoxO3a was localized in the granulosa cells of follicles at all stages and was extensively localized in the cytoplasma of the luteinized granulosa cells of corpora lutea. Together, the stage- and cell-specific expression patterns of inhibin alpha-subunit, FoxO3a, and PKB suggest that these proteins might play potential roles in follicular development, atresia, and luteinization in the minipig.
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Affiliation(s)
- Chunhua Meng
- Laboratory of Animal Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, PR China
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Sasaki K, Medan MS, Watanabe G, Sharawy S, Taya K. Immunization of Goats against Inhibin Increased Follicular Development and Ovulation Rate. J Reprod Dev 2006; 52:543-50. [PMID: 16757878 DOI: 10.1262/jrd.18028] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In the present study, two experiments were conducted to induce superovulation in goats using passive and active immunization against inhibin. In the first experiment, two groups of goats were given an intravenous injection of either 10 ml normal goat serum (control; n=6) or inhibin antiserum developed against [Tyro30]-inhibin alpha (1-30) (passively immunized; n=6) 48 h before treatment with PGF2alpha. In the second experiment, two groups of goats were immunized with inhibin vaccine (actively immunized; n=5) or Freund's adjuvant (control; n=5) followed by three booster immunizations at 4 week intervals. Blood samples were collected for determination of FSH, LH, estradiol-17beta, and progesterone. Ultrasonography was used to determine ovarian activity at PGF2alpha injection and ovulation rate one week after estrus. In both experiments, there was a significant increase in plasma FSH concentration compared with the controls. However, the pattern of the FSH levels was different between the passively and actively immunized goats. The numbers of follicles in passively and actively immunized goats (22.4 +/- 2.3 and 18.6 +/- 2.1, respectively) were significantly greater than those in the controls (2.6 +/- 0.4 and 2.3 +/- 0.4, respectively). In addition, the ovulation rate was greater in the immunized animals compared with the controls. Therefore, either passive or active immunization against inhibin could be used to induce superovulation in goats.
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