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Guo X, Dai T, Wei S, Ma Z, Zhao H, Dan X. Rfamide-related peptide-3(RFRP-3) receptor gene is expressed in mouse ovarian granulosa cells: Potential role of RFRP-3 in steroidogenesis and apoptosis. Steroids 2024; 202:109349. [PMID: 38072091 DOI: 10.1016/j.steroids.2023.109349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 12/04/2023] [Accepted: 12/06/2023] [Indexed: 12/22/2023]
Abstract
RFRP-3 is a functional ortholog of avian GnIH and regulates reproductive activities in the gonads of animals. However, the role of RFRP-3 in the function of ovarian granulosa cells in mice remains unclear. First, we detected the expression of the RFRP-3 receptor (GPR147) in the ovarian granulosa cells of mice. Second, the effect of RFRP-3 treatment on estradiol and progesterone secretions from granulosa cells was tested by ELISA. Meanwhile, the expression of genes and proteins regulating steroid hormone synthesis was respectively examined by qPCR and western blot. Furthermore, the effect of RFRP-3 treatment on the apoptosis of granulosa cells was analyzed. The results revealed that the GPR147 protein (a RFRP-3 receptor) was expressed in the ovarian granulosa cells of mice. Low and medium doses RFRP-3 treatment significantly reduced progesterone secretion in the granulosa cells (P < 0.05), while RFRP-3 suppressed p450scc, 3β-HSD, StAR, and FSHR expression in a non-dose-dependent manner. Moreover, RFRP-3 treatment might induce the apoptosis of granulosa cells. Additionally, low doses RFRP-3 significantly reduced p-ERK1/2 protein expression (P < 0.05) in the ovarian granulosa cells. We here, for the first time, confirmed that GPR147 was expressed in the ovarian granulosa cells of mice. Our findings suggested that and RFRP-3 regulates the granulosa cell function through the ERK signaling pathway, which will lay the foundation for uncovering molecular mechanisms by which RFRP-3 regulates follicle development in future.
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Affiliation(s)
- Xingru Guo
- College of Animal Science and Technology, Ningxia University, Yinchuan, PR China
| | - Tianshu Dai
- College of Animal Science and Technology, Ningxia University, Yinchuan, PR China
| | - Shihao Wei
- College of Animal Science and Technology, Ningxia University, Yinchuan, PR China
| | - Ziming Ma
- College of Animal Science and Technology, Ningxia University, Yinchuan, PR China
| | - Hongxi Zhao
- College of Animal Science and Technology, Ningxia University, Yinchuan, PR China.
| | - Xingang Dan
- College of Animal Science and Technology, Ningxia University, Yinchuan, PR China; Ningxia Province's Key Laboratory of animal cell and molecular breeding, Yinchuan, PR China.
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2
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Falceto MV, Suárez-Usbeck A, Tejedor MT, Ausejo R, Garrido AM, Mitjana O. GnRH agonists: Updating fixed-time artificial insemination protocols in sows. Reprod Domest Anim 2023; 58:571-582. [PMID: 36748111 DOI: 10.1111/rda.14326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 01/31/2023] [Accepted: 01/31/2023] [Indexed: 02/08/2023]
Abstract
Protocols for fixed-time artificial insemination (FTAI) in swine reproduction can help increase genetic improvement and production efficiency. Different gonadotropin-releasing hormone (GnRH) agonists have been developed to gain better control of follicular development, timing, and ovulation quality; therefore, they have been extensively used in FTAI protocols. This literature review resumes the most important characteristics of the physiology of follicular development and ovulation in sows, followed by a discussion about the hormonal alternatives available to induce ovulation (human chorionic gonadotropin, hCG; porcine luteinizing hormone, LH and GnRH agonists). Also, ovulation induction failures with GnRH agonists are described. Finally, current FTAI protocols with GnRH agonists are resumed and discussed. FTAI with GnRH agonists has proven to be an efficient, successful reproductive protocol that can be implemented in pig farms due to better knowledge of an endocrine system that regulates follicular development and ovulation and increased availability of several GnRH agonists that allow more efficient reproductive swine programs.
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Affiliation(s)
- María Victoria Falceto
- Agroalimentary Institute of Aragon-IA2, Department of Animal Pathology, Universidad de Zaragoza-CITA, Zaragoza, Spain
| | - Andrés Suárez-Usbeck
- Department of Animal Pathology, Universidad de Zaragoza, Zaragoza, Spain.,Facultad de Ciencias Pecuarias, Escuela Superior Politécnica de Chimborazo, Riobamba, Ecuador
| | - María Teresa Tejedor
- Department of Anatomy, Embriology and Animal Genetics, CiberCV, Universidad de Zaragoza, Zaragoza, Spain
| | - Raquel Ausejo
- Department of Animal Pathology, Universidad de Zaragoza, Zaragoza, Spain
| | - Ana María Garrido
- Department of Animal Pathology, Universidad de Zaragoza, Zaragoza, Spain
| | - Olga Mitjana
- Agroalimentary Institute of Aragon-IA2, Department of Animal Pathology, Universidad de Zaragoza-CITA, Zaragoza, Spain
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Ma Y, Ladisa C, Chang JP, Habibi HR. Seasonal Related Multifactorial Control of Pituitary Gonadotropin and Growth Hormone in Female Goldfish: Influences of Neuropeptides and Thyroid Hormone. Front Endocrinol (Lausanne) 2020; 11:175. [PMID: 32318022 PMCID: PMC7154077 DOI: 10.3389/fendo.2020.00175] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 03/11/2020] [Indexed: 12/13/2022] Open
Abstract
Female reproduction is under multifactorial control of brain-pituitary-peripheral origin. The present study provides information on seasonal changes in circulating LH and GH concentrations, as well as transcript levels for a number of genes involved in the regulation of reproduction and growth in female goldfish. We also provide information on the effects of treatments with GnRH and/or GnIH, and their interaction with T3, at three stages of gonadal recrudescence. Maximum basal concentration of LH was observed at late recrudescence (Spring) while no seasonal changes in basal serum GH levels was detected. Serum LH and GH levels were stimulated by GnRH as expected, depending on the season. GnIH stimulated basal GH concentrations in gonadally regressed fish. GnIH inhibitory action on GnRH-induced LH response was observed in late, but not in mid recrudescence. T3 actions on basal and GnRH- or GnIH-induced GH secretion were generally inhibitory, depending on season. Administration of T3 attenuated GnRH-induced LH responses in mid and late stages of gonadal recrudescence, and the presence of GnIH abolished inhibitory actions of T3 in fish at mid recrudescence. Our results also demonstrated seasonal patterns in basal and GnRH- and/or GnIH-induced transcript levels for ERα, ERβI, FSHR, aromatase, TRαI, TRβ, IGF-I, and Vtg in the liver and ovary. However, there were no clear correlations between changes in transcript levels and circulating levels of LH and GH. The results support the hypothesis that GnRH, GnIH, and T3 are contributing factors in complex reciprocal control of reproduction and growth in goldfish.
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Affiliation(s)
- Yifei Ma
- Department of Biological Sciences, University of Calgary, Calgary, AB, Canada
| | - Claudia Ladisa
- Department of Biological Sciences, University of Calgary, Calgary, AB, Canada
| | - John P. Chang
- Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada
| | - Hamid R. Habibi
- Department of Biological Sciences, University of Calgary, Calgary, AB, Canada
- *Correspondence: Hamid R. Habibi
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Yu L, Xu D, Ye H, Yue H, Ooka S, Kondo H, Yazawa R, Takeuchi Y. Gonadal Transcriptome Analysis of Pacific Abalone Haliotis discus discus: Identification of Genes Involved in Germ Cell Development. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2018; 20:467-480. [PMID: 29616430 DOI: 10.1007/s10126-018-9809-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Accepted: 03/08/2018] [Indexed: 06/08/2023]
Abstract
Little is known about the molecular mechanisms governing gonadal developmental processes in abalones. Here, we conducted transcriptome analysis of Pacific abalone Haliotis discus discus for gene discovery in the brain, ovary, testis, and unfertilized eggs. Among the annotated unigenes, 48.6% of unigenes were identified by Venn diagram analysis as having universal or tissue-specific expression. Twenty-three genes with gonad-biased gene ontology (GO) terms were first obtained. Secondly, 36 genes were found by screening known gene names related to germ cell development. Finally, 17 genes were obtained by querying the annotated unigene database for zygotically expressed gonadal genes (ovary and testis) and maternally expressed gonadal genes (ovary, testis, and unfertilized eggs) using keywords related to reproduction. To further verify tissue distribution pattern and subcellular localization of these genes, RT-PCR and in situ hybridization were performed using a unigene encoding a germ cell marker, vasa, as control. The results showed that vasa was expressed mainly in the early developmental stages of germ cells in both sexes. One of the candidate genes, vitelline envelope zona pellucida domain protein 12 (ZP12), was expressed in the primordial germ cells of immature gonad and early developmental stages of germ cells of the adult female. The results obtained from the present study suggest that vasa and ZP12 are involved in germ cell development of Pacific abalone and that ZP12 is an especially useful germ cell-specific marker in immature adults. The current gonadal transcriptome profile is an extensive resource for future reproductive molecular biology studies of this species.
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Affiliation(s)
- Lingyun Yu
- Research Center for Advanced Science and Technology, Tokyo University of Marine Science and Technology, 670 Banda, Tateyama, Chiba, 294-0308, Japan
| | - Dongdong Xu
- Research Center for Advanced Science and Technology, Tokyo University of Marine Science and Technology, 670 Banda, Tateyama, Chiba, 294-0308, Japan
- Marine Fishery Institute of Zhejiang Province, Key Lab of Mariculture and Enhancement of Zhejiang Province, Zhoushan, Zhejiang Province, 316100, China
| | - Huan Ye
- Key Laboratory of Freshwater Biodiversity Conservation, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, 430223, China
| | - Huamei Yue
- Key Laboratory of Freshwater Biodiversity Conservation, Ministry of Agriculture of China, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, 430223, China
| | - Shioh Ooka
- Japan Ocean Resources Development and Engineering Co., Ltd., 7-1 Jizohamacho, Kishiwada, Osaka, 596-0015, Japan
| | - Hidehiro Kondo
- Department of Marine Bioscience, Tokyo University of Marine Science and Technology, Minato, Konan 4-5-7, Tokyo, 108-8477, Japan
| | - Ryosuke Yazawa
- Department of Marine Bioscience, Tokyo University of Marine Science and Technology, Minato, Konan 4-5-7, Tokyo, 108-8477, Japan
| | - Yutaka Takeuchi
- Faculty of Fisheries, Kagoshima University, 4-50-20 Shimoarata, Kagoshima, 890-0056, Japan.
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Choi YJ, Habibi HR, Kil GS, Jung MM, Choi CY. Effect of cortisol on gonadotropin inhibitory hormone (GnIH) in the cinnamon clownfish, Amphiprion melanopus. Biochem Biophys Res Commun 2017; 485:342-348. [DOI: 10.1016/j.bbrc.2017.02.078] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 02/14/2017] [Indexed: 01/26/2023]
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Choi YJ, Kim NN, Habibi HR, Choi CY. Effects of gonadotropin inhibitory hormone or gonadotropin-releasing hormone on reproduction-related genes in the protandrous cinnamon clownfish, Amphiprion melanopus. Gen Comp Endocrinol 2016; 235:89-99. [PMID: 27288637 DOI: 10.1016/j.ygcen.2016.06.010] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 06/02/2016] [Accepted: 06/08/2016] [Indexed: 12/30/2022]
Abstract
Hypothalamic peptide neurohormones such as gonadotropin-releasing hormones (GnRHs) and gonadotropin-inhibitory hormone (GnIH) play pivotal roles in the control of reproduction and gonadal maturation in teleost fish. To study the effects of GnIH on fish reproduction, we investigated the influence of seabream GnRH (sbGnRH) and GnIH (both alone and in combination) on levels of reproductive genes (GnIH, GnIH-receptor [GnIH-R], melatonin receptor [MT3], sbGnRH, and gonadotropic hormones [GTHs]) during different stages of gonadal maturation in male, female, and immature cinnamon clownfish, Amphiprion melanopus. The results showed that the expression levels of GnIH, GnIH-R, and MT3 genes increased after the GnIH injection, but decreased after the sbGnRH injection. In addition, these gene expression levels gradually lowered after GnIH3 and sbGnRH combination treatment, as compared to the MT3 mRNA levels of GnIH treatment alone. However, the expression levels of the HPG (hypothalamus-pituitary-gonad) axis genes (sbGnRH and GTHs) decreased after the GnIH injection, but increased after the sbGnRH injection. In all cinnamon clownfish groups, HPG axis gene mRNA levels gradually decreased after mixed GnIH3 and sbGnRH treatment, compared to GnIH treatment alone. The present study provides novel information on the effects of GnIH and strongly supports the hypothesis that GnIH plays an important role in the negative regulation of the HPG axis in the protandrous cinnamon clownfish.
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Affiliation(s)
- Young Jae Choi
- Division of Marine BioScience, Korea Maritime and Ocean University, Busan 49112, Republic of Korea
| | - Na Na Kim
- Division of Marine BioScience, Korea Maritime and Ocean University, Busan 49112, Republic of Korea
| | - Hamid R Habibi
- Department of Biological Sciences, University of Calgary, 2500 University Drive N.W. Calgary, Alberta T3B 2V4, Canada
| | - Cheol Young Choi
- Division of Marine BioScience, Korea Maritime and Ocean University, Busan 49112, Republic of Korea.
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Han X, Li J, Cao X, Du X, Meng F, Zeng X. Surgical castration but not immuncastration is associated with reduced hypothalamic GnIH and GHRH/GH/IGF-I axis function in male rats. Theriogenology 2016; 86:657-65. [DOI: 10.1016/j.theriogenology.2016.02.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2015] [Revised: 12/13/2015] [Accepted: 02/22/2016] [Indexed: 10/22/2022]
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8
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Choi YJ, Habibi HR, Choi CY. Profiles of gonadotropin-inhibitory hormone and melatonin during the sex change and maturation of cinnamon clownfish, Amphiprion melanopus. Biochem Biophys Res Commun 2016; 475:189-93. [DOI: 10.1016/j.bbrc.2016.05.073] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Accepted: 05/13/2016] [Indexed: 11/25/2022]
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9
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Moriya S, Soga T, Wong DW, Parhar IS. Transcriptome composition of the preoptic area in mid-age and escitalopram treatment in male mice. Neurosci Lett 2016; 622:67-71. [PMID: 27113202 DOI: 10.1016/j.neulet.2016.04.052] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 04/16/2016] [Accepted: 04/22/2016] [Indexed: 01/18/2023]
Abstract
The decrease in serotonergic neurotransmission during aging can increase the risk of neuropsychiatric diseases such as depression in elderly population and decline the reproductive system. Therefore, it is important to understand the age-associated molecular mechanisms of brain aging. In this study, the effect of aging and chronic escitalopram (antidepressant) treatment to admit mice was investigated by comparing transcriptomes in the preoptic area (POA) which is a key nucleus for reproduction. In the mid-aged brain, the immune system-related genes were increased and hormone response-related genes were decreased. In the escitalopram treated brains, transcription-, granule cell proliferation- and vasoconstriction-related genes were increased and olfactory receptors were decreased. Since homeostasis and neuroprotection-related genes were altered in both of mid-age and escitalopram treatment, these genes could be important for serotonin related physiologies in the POA.
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Affiliation(s)
- Shogo Moriya
- Brain Research Institutes, Monash University Malaysia, Bandar Sunway, Selangor 47500, Malaysia.
| | - Tomoko Soga
- Brain Research Institutes, Monash University Malaysia, Bandar Sunway, Selangor 47500, Malaysia
| | - Dutt Way Wong
- Brain Research Institutes, Monash University Malaysia, Bandar Sunway, Selangor 47500, Malaysia
| | - Ishwar S Parhar
- Brain Research Institutes, Monash University Malaysia, Bandar Sunway, Selangor 47500, Malaysia
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10
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Jennings KJ, Chang J, Cho H, Piekarski DJ, Russo KA, Kriegsfeld LJ. Aggressive interactions are associated with reductions in RFamide-related peptide, but not kisspeptin, neuronal activation in mice. Horm Behav 2016; 78:127-34. [PMID: 26528893 DOI: 10.1016/j.yhbeh.2015.10.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Revised: 10/27/2015] [Accepted: 10/30/2015] [Indexed: 12/16/2022]
Abstract
Aggressive interactions lead to changes in both future behavior and circulating testosterone (T) concentrations in animals across taxa. The specific neural circuitry and neurochemical systems by which these encounters alter neuroendocrine functioning are not well understood. Neurons expressing the inhibitory and stimulatory neuropeptides, RFamide-related peptide (RFRP) and kisspeptin, respectively, project to neural loci regulating aggression in addition to neuroendocrine cells controlling sex steroid production. Given these connections to both the reproductive axis and aggression circuitry, RFRP and kisspeptin are in unique positions to mediate post-encounter changes in both T and behavior. The present study examined the activational state of RFRP and kisspeptin neurons of male C57BL/6 mice following an aggressive encounter. Both winners and losers exhibited reduced RFRP/FOS co-localization relative to handling stress controls. Social exposure controls did not display reduced RFRP neuronal activation, indicating that this effect is due to aggressive interaction specifically rather than social interaction generally. RFRP neuronal activation positively correlated with latencies to display several offensive behaviors within winners. These effects were not observed in the anteroventral periventricular (AVPV) nucleus kisspeptin cell population. Together, these findings point to potential neuromodulatory role for RFRP in aggressive behavior and in disinhibiting the reproductive axis to facilitate an increase in T in response to social challenge.
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Affiliation(s)
| | - Jenny Chang
- Department of Psychology, University of California, Berkeley, CA, USA
| | - Hweyryoung Cho
- Department of Psychology, University of California, Berkeley, CA, USA
| | - David J Piekarski
- Department of Psychology, University of California, Berkeley, CA, USA
| | - Kimberly A Russo
- Department of Psychology, University of California, Berkeley, CA, USA
| | - Lance J Kriegsfeld
- Department of Psychology, University of California, Berkeley, CA, USA; The Helen Wills Neuroscience Institute, University of California, Berkeley, CA, USA.
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11
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Dan X, Liu X, Han Y, Liu Q, Yang L. Effect of the novel DNA vaccine fusing inhibin α (1-32) and the RF-amide related peptide-3 genes on immune response, hormone levels and fertility in Tan sheep. Anim Reprod Sci 2016; 164:105-10. [DOI: 10.1016/j.anireprosci.2015.11.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Revised: 10/29/2015] [Accepted: 11/15/2015] [Indexed: 11/24/2022]
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12
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Knox RV. Recent advancements in the hormonal stimulation of ovulation in swine. VETERINARY MEDICINE (AUCKLAND, N.Z.) 2015; 6:309-320. [PMID: 30101116 PMCID: PMC6067529 DOI: 10.2147/vmrr.s68960] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Induction of ovulation for controlled breeding is available for use around the world, and conditions for practical application appear promising. Many of the hormones available, such as human chorionic gonadotropin (hCG), gonadotropin-releasing hormone (GnRH) and its analogs, as well as porcine luteinizing hormone (pLH), have been shown to be effective for advancing or synchronizing ovulation in gilts and weaned sows. Each of the hormones has unique attributes with respect to the physiology of its actions, how it is administered, its efficacy, and approval for use. The timing for induction of ovulation during the follicle phase is critical as follicle maturity changes over time, and the success of the response is determined by the stage of follicle development. Female fertility is also a primary factor affecting the success of ovulation induction and fixed time insemination protocols. Approximately 80%-90% of female pigs will develop mature follicles following weaning in sows and synchronization of estrus in gilts. However, those gilts and sows with follicles that are less developed and mature, or those that develop with abnormalities, will not respond to an ovulatory surge of LH. To address this problem, some protocols induce follicle development in all females, which can improve the overall reliability of the ovulation response. Control of ovulation is practical for use with fixed time artificial insemination and should prove highly advantageous for low-dose and single-service artificial insemination and for use with frozen-thawed and sex-sorted sperm.
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Affiliation(s)
- Robert V Knox
- Department of Animal Sciences, 360 Animal Sciences Laboratory, University of Illinois, Champaign Urbana, IL, USA,
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13
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Amorin N, Calisi RM. Measurements of Neuronal Soma Size and Estimated Peptide Concentrations in Addition to Cell Abundance Offer a Higher Resolution of Seasonal and Reproductive Influences of GnRH-I and GnIH in European Starlings. Integr Comp Biol 2015; 55:332-42. [DOI: 10.1093/icb/icv063] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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14
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Rousseau K, Dufour S, Vaudry H. Editorial: A Comparative Survey of the RF-Amide Peptide Superfamily. Front Endocrinol (Lausanne) 2015; 6:120. [PMID: 26322015 PMCID: PMC4530588 DOI: 10.3389/fendo.2015.00120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 07/23/2015] [Indexed: 12/30/2022] Open
Affiliation(s)
- Karine Rousseau
- Laboratory of Biology of Aquatic Organisms and Ecosystems (BOREA), Muséum National d’Histoire Naturelle, CNRS 7208, IRD 207, Université Pierre and Marie Curie, UCBN, Paris, France
- *Correspondence: Karine Rousseau,
| | - Sylvie Dufour
- Laboratory of Biology of Aquatic Organisms and Ecosystems (BOREA), Muséum National d’Histoire Naturelle, CNRS 7208, IRD 207, Université Pierre and Marie Curie, UCBN, Paris, France
| | - Hubert Vaudry
- Laboratory of Neuronal and Neuroendocrine Differentiation and Communication, INSERM U982, International Associated Laboratory Samuel de Champlain, Institute for Research and Innovation in Biomedicine (IRIB), University of Rouen, Mont-Saint-Aignan, France
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15
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Moussavi M, Wlasichuk M, Chang JP, Habibi HR. Seasonal effects of GnIH on basal and GnRH-induced goldfish somatotrope functions. J Endocrinol 2014; 223:191-202. [PMID: 25319842 DOI: 10.1530/joe-14-0441] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
To understand how gonadotropin-inhibitory hormone (GnIH) regulates goldfish GH cell functions, we monitored GH release and expression during early, mid-, and/or late gonadal recrudescence. In vivo and in vitro responses to goldfish (g) GnIH were different, indicating direct action at the level of pituitary, as well as interactions with other neuroendocrine factors involved in GH regulation. Injection of gGnIH consistently reduced basal serum GH levels but elevated pituitary gh mRNA levels, indicating potential dissociation of GH release and synthesis. Goldfish GnRH (sGnRH and cGnRHII) injection differentially stimulated serum GH and pituitary gh mRNA levels with some seasonal differences; these responses were reduced by gGnIH. In contrast, in vitro application of gGnIH during 24-h static incubation of goldfish pituitary cells generally elevated basal GH release and attenuated sGnRH-induced changes in gh mRNA, while suppressing basal gh mRNA levels at mid- and late recrudescence but elevating them at early recrudescence. gGnIH attenuated the GH release responses to sGnRH during static incubation at early, but not at mid- and late recrudescence. In cell column perifusion experiments examining short-term GH release, gGnIH reduced the cGnRHII- and sGnRH-stimulated secretion at late recrudescence but inhibited tha action of cGnRHII only during mid-recrudescence. Interestingly, a reduction of basal GH release upon perifusion with gGnIH during late recrudescence was followed by a rebound increase in GH release upon gGnIH removal. These results indicate that gGnIH exerts complex effects on basal and GnRH-stimulated goldfish GH cell functions and can differentially affect GH release and mRNA expression in a seasonal reproductive manner.
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Affiliation(s)
- M Moussavi
- Department of Biological SciencesUniversity of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4Department of Biological SciencesUniversity of Alberta, Edmonton, Alberta, Canada T6G 2E9
| | - M Wlasichuk
- Department of Biological SciencesUniversity of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4Department of Biological SciencesUniversity of Alberta, Edmonton, Alberta, Canada T6G 2E9 Department of Biological SciencesUniversity of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4Department of Biological SciencesUniversity of Alberta, Edmonton, Alberta, Canada T6G 2E9
| | - J P Chang
- Department of Biological SciencesUniversity of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4Department of Biological SciencesUniversity of Alberta, Edmonton, Alberta, Canada T6G 2E9 Department of Biological SciencesUniversity of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4Department of Biological SciencesUniversity of Alberta, Edmonton, Alberta, Canada T6G 2E9
| | - H R Habibi
- Department of Biological SciencesUniversity of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4Department of Biological SciencesUniversity of Alberta, Edmonton, Alberta, Canada T6G 2E9
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16
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Calisi RM. An integrative overview of the role of gonadotropin-inhibitory hormone in behavior: applying Tinbergen's four questions. Gen Comp Endocrinol 2014; 203:95-105. [PMID: 24704003 DOI: 10.1016/j.ygcen.2014.03.028] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2013] [Revised: 03/12/2014] [Accepted: 03/14/2014] [Indexed: 01/06/2023]
Abstract
The integration of various fields of investigation is of key importance to fully comprehending endocrine function. Here, I enact the theoretical framework of Nikolaas Tinbergen's four questions for understanding behavior to help bridge the wide gap that exists between our relatively reductionist molecular knowledge of a particular neurohormone, gonadotropin-inhibitory hormone (GnIH), and its place in animal behavior. Hypothalamic GnIH, upon its discovery in 2000, was so named because of its inhibitory effect on the release of the gonadotropins, luteinizing hormone (LH) and follicle stimulating hormone (FSH), from the pituitary. Because gonadotropins are necessary for reproduction, this finding stimulated questions about the functional significance of GnIH in reproduction and sexual behavior. After over a decade of research, invaluable knowledge has been gained regarding the mechanistic attributes of GnIH (mammalian homolog, RFamide-related peptide (RFRP)) in a variety of vertebrate species. However, many questions remain regarding the effect of the environment on GnIH and the subsequent effects of GnIH on behavior. I review the role of GnIH in shaping behavior using the framework of Tinbergen's four questions of mechanism, ontogeny, function and phylogeny. The studies I review were conducted in various species of mammals, birds, and in one species of fish. Because GnIH can play a role in mediating behaviors such as those important for reproduction, sociality, feeding, and the stress response in a variety of species, an integrative approach to the study of GnIH will help provide a multipronged schema for answering questions of GnIH function. By using the framework highlighted by Tinbergen's four questions, we will deepen and enhance our knowledge of the role of hormones in behavior from the point of view of the mechanisms involved.
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Sandvik GK, Hodne K, Haug TM, Okubo K, Weltzien FA. RFamide Peptides in Early Vertebrate Development. Front Endocrinol (Lausanne) 2014; 5:203. [PMID: 25538682 PMCID: PMC4255600 DOI: 10.3389/fendo.2014.00203] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Accepted: 11/16/2014] [Indexed: 12/17/2022] Open
Abstract
RFamides (RFa) are neuropeptides involved in many different physiological processes in vertebrates, such as reproductive behavior, pubertal activation of the reproductive endocrine axis, control of feeding behavior, and pain modulation. As research has focused mostly on their role in adult vertebrates, the possible roles of these peptides during development are poorly understood. However, the few studies that exist show that RFa are expressed early in development in different vertebrate classes, perhaps mostly associated with the central nervous system. Interestingly, the related peptide family of FMRFa has been shown to be important for brain development in invertebrates. In a teleost, the Japanese medaka, knockdown of genes in the Kiss system indicates that Kiss ligands and receptors are vital for brain development, but few other functional studies exist. Here, we review the literature of RFa in early vertebrate development, including the possible functional roles these peptides may play.
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Affiliation(s)
- Guro Katrine Sandvik
- Department of Basic Sciences and Aquatic medicine, Norwegian University of Life Sciences , Oslo , Norway
| | - Kjetil Hodne
- Institute for Experimental Medical Research, Oslo University Hospital , Oslo , Norway
| | | | - Kataaki Okubo
- Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University of Tokyo , Bunkyo , Japan
| | - Finn-Arne Weltzien
- Department of Basic Sciences and Aquatic medicine, Norwegian University of Life Sciences , Oslo , Norway
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