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Saedi S, Namavar MR, Shirazi MRJ, Rezazadeh FM, Tsutsui K. Exposure to Cadmium Alters the Population of Glial Cell Types and Disrupts the Regulatory Mechanisms of the HPG Axis in Prepubertal Female Rats. Neurotox Res 2022; 40:1029-42. [PMID: 35639248 DOI: 10.1007/s12640-022-00516-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 04/25/2022] [Accepted: 04/26/2022] [Indexed: 12/30/2022]
Abstract
Despite the fact that the brain is susceptible to neurotoxicity induced by cadmium (Cd), the effects of Cd on the neuroanatomical development in the hypothalamus and regulatory mechanisms of the hypothalamic-pituitary-gonadal (HPG) axis are not fully understood. To clarify this issue, we investigated the effects of 25 mg/kg BW/day cadmium chloride (CdCl2) on neuroanatomical alterations in the hypothalamus of prepubertal female rats. Twenty-four Sprague-Dawley rats were randomly assigned to two groups (n = 12), and CdCl2 was administered via gavage from postnatal days (PND) 21 to PND35. The results of the stereological analysis demonstrated that prepubertal exposure to Cd reduced the number of neurons and oligodendrocytes in the arcuate (ARC) and dorsomedial hypothalamus nucleus (DMH) nuclei. In contrast, Cd exposure increased the number of microglial cells in the ARC and DMH nuclei. Cd exposure decreased the mRNA levels of gonadotropin-releasing hormone (GnRH) and increased the mRNA levels of RFamide-related peptide (RFRP-3), but not kisspeptin (Kiss1) in the hypothalamus. Moreover, hormonal assay showed that Cd exposure caused a reduction in the concentration of gonadotropins: luteinizing hormone (LH) and follicle-stimulating hormone (FSH) in serum. Immunohistochemical expression of RFRP-3 in neuronal cell bodies demonstrated that the mean number of RFRP-3 expressing neurons in the DMH nucleus of cadmium-treated rats was dramatically higher than the vehicle group. Overall, exposure to Cd during the prepubertal period alters the population of neurons and glial cell types in the hypothalamus. Additionally, Cd exposure disrupts the regulatory mechanisms of the HPG axis.
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Kumar P, Wisdom KS, Kumar Ram R, Gireesh-Babu P, Kumar Nayak S, Nagpure NS, Sharma R. Gonadotropin inhibitory hormone receptors (GnIHRs): Molecular characterization and synergistic effect of different drugs in Indian major carp, Labeo catla. Gen Comp Endocrinol 2021; 314:113904. [PMID: 34530001 DOI: 10.1016/j.ygcen.2021.113904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Revised: 09/08/2021] [Accepted: 09/09/2021] [Indexed: 11/30/2022]
Abstract
After the discovery of Gonadotropin-inhibitory hormone (GnIH) in birds in 2000, it showed different roles in different vertebrate classes and even in different species of same classes. In birds and mammals, GnIH inhibits the expression of gonadotropins during reproduction, while in fishes it exerts both inhibitory and stimulatory effect on reproduction. The current study evaluates the role of GnIH during reproduction in Labeo catla. The partial cDNA sequence of GnIHR1 and GnIHR3 receptor genes was identified by degenerate PCR. The mRNA expression analysis of GnIHRs during different reproductive phases showed that the expression of all three GnIH receptor genes is highest during spawning phase. The expression of GnIH receptors is detected in both brain and gonads except for GnIHR3 which only expressed in gonads. The in vivo experiments with GnIH antagonist, RF313 drastically reduced the expression level of reproduction related genes like LH, FSH, and GnRH at 1 h post-injection. In another experiment the surge induced by cGnIH-III peptide on gonadotropins gene expression is further increased when co-injected with LHRHa. However, co-injection of melatonin along with cGnIH-III peptide had opposite effects. These results showed that the GnIH/GnIHRs system has positive effect on reproduction in L. catla.
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Affiliation(s)
- Pravesh Kumar
- College of Fisheries, Dr. Rajendra Prasad Central Agricultural University, Pusa, Bihar, India.
| | - K S Wisdom
- ICAR-Central Institute of Fisheries Education, Mumbai 400061, India
| | - Roshan Kumar Ram
- College of Fisheries, Dr. Rajendra Prasad Central Agricultural University, Pusa, Bihar, India
| | | | | | - N S Nagpure
- ICAR-Central Institute of Fisheries Education, Mumbai 400061, India
| | - Rupam Sharma
- ICAR-Central Institute of Fisheries Education, Mumbai 400061, India
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Manoochehri R, Jafarzadeh Shirazi MR, Akhlaghi A, Tsutsui K, Namavar MR, Zamiri MJ, Rezazadeh FM. The localization and expression of gonadotropin inhibitory hormone in the hypothalamus of turkey hens during the prepubertal, pubertal and postpubertal phases. Domest Anim Endocrinol 2021; 74:106486. [PMID: 32882449 DOI: 10.1016/j.domaniend.2020.106486] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 03/27/2020] [Accepted: 04/14/2020] [Indexed: 10/24/2022]
Abstract
Gonadotropin inhibitory hormone (GnIH), initially discovered in birds as a hypothalamic neuropeptide, inhibits the synthesis and release of gonadotropins by affecting GnRH neurons and gonadotropes. Therefore, it may be a key neuropeptide in reproduction in birds. The aim of the present study was to investigate the prepubertal, pubertal, and postpubertal localization of GnIH and changes in hypothalamic GnIH expression in British United Turkey hens. In prepubertal, pubertal, and postpubertal periods, the brains of turkey hens (n = 15) were removed after fixation. Sections (30 μm) were prepared from the entire hypothalamus and stained immunohistochemically against GnIH antibody. Gonadotropin inhibitory hormone-immunoreactive neurons were observed in the paraventricular nucleus. These neurons were significantly more abundant in the prepubertal turkeys than pubertal and postpubertal turkeys (P < 0.05). The results suggested that GnIH neurons have an important role in regulating the pubertal events in British United Turkey hens.
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Affiliation(s)
- R Manoochehri
- Department of Animal Science, College of Agriculture, Shiraz University, Shiraz, Iran
| | | | - A Akhlaghi
- Department of Animal Science, College of Agriculture, Shiraz University, Shiraz, Iran
| | - K Tsutsui
- Laboratory of Integrative Brain Sciences, Department of Biology, Center for Medical Life Science, Waseda University, Tokyo 162-8480, Japan
| | - M R Namavar
- Department of Anatomy, Clinical Neurology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran; Department of Anatomy, Histomorphometry and Stereology Research Centre, Shiraz University of Medical Sciences, Shiraz, Iran
| | - M J Zamiri
- Department of Animal Science, College of Agriculture, Shiraz University, Shiraz, Iran
| | - F M Rezazadeh
- Department of Animal Science, College of Agriculture, Shiraz University, Shiraz, Iran
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Kumar P, Wisdom KS, Bhat IA, Pathakota GB, Nayak SK, Reang D, Nagpure NS, Sharma R. Molecular characterization of gonadotropin-inhibitory hormone (GnIH) gene and effect of intramuscular injection of GnIH peptide on the reproductive axis in Catla catla. Anim Biotechnol 2019; 31:335-349. [DOI: 10.1080/10495398.2019.1597730] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Pravesh Kumar
- Division of Fish Genetics and Biotechnology, ICAR-Central Institute of Fisheries Education, Mumbai, India
- Department of Aquaculture, College of Fisheries, Dr. Rajendra Prasad Central Agricultural University, Pusa, India
| | - K. S. Wisdom
- Division of Fish Genetics and Biotechnology, ICAR-Central Institute of Fisheries Education, Mumbai, India
| | - Irfan Ahmad Bhat
- College of Fisheries, Birsa Agricultural University, Gumla, India
| | - Gireesh-Babu Pathakota
- Division of Fish Genetics and Biotechnology, ICAR-Central Institute of Fisheries Education, Mumbai, India
| | - Sunil Kumar Nayak
- Division of Fish Genetics and Biotechnology, ICAR-Central Institute of Fisheries Education, Mumbai, India
| | - Dhalongsaih Reang
- Division of Fish Genetics and Biotechnology, ICAR-Central Institute of Fisheries Education, Mumbai, India
| | - N. S. Nagpure
- Division of Fish Genetics and Biotechnology, ICAR-Central Institute of Fisheries Education, Mumbai, India
| | - Rupam Sharma
- Division of Fish Genetics and Biotechnology, ICAR-Central Institute of Fisheries Education, Mumbai, India
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Habibi H, Ghahtan N, Brooks DM. Effect of sex ratio, storage time and temperature on hatching rate, fertility and embryonic mortality in Chukar partridge (Alectoris chukar). Anim Reprod Sci 2019; 203:68-74. [PMID: 30824158 DOI: 10.1016/j.anireprosci.2019.02.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 01/30/2019] [Accepted: 02/20/2019] [Indexed: 11/29/2022]
Abstract
Chukar partridges (Alectoris chukar) are frequently reared in captivity with the aim of producing fertile eggs and chicks. The aims of the present study were to evaluate the effect of male to female sex ratio on hatching rate and fertility and to determine the optimal temperature and time for egg storage and its effect on hatching rate and embryonic mortality in Chukar partridges. Maximum hatching rate and fertility rate were affected by male:female ratios during breeding (P < 0.05). The greatest embryonic mortality rate was with eggs that were stored at 25 °C for 15-20 d, however, the greatest hatching rate was when eggs were stored at 10 and 15 °C for 5 days. Storage time of Chukar partridge eggs can be extended for as long as 5 d, but longer storage periods can negatively affect hatching rate. In conclusion, a reduction of storage temperature and duration of time of storage in combination with reducing the sex ratio of the egg producing females and males during the breeding period might improve fertility, hatching rate and fertility of Chukar partridge eggs.
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Affiliation(s)
- Hassan Habibi
- Department of Animal Sciences, Agricultural and Natural Resources College, Persian Gulf University, Bushehr, Iran.
| | - Najmeh Ghahtan
- Department of Horticultural Sciences, Agriculture and Natural Resources College, Persian Gulf University, Bushehr, Iran
| | - Daniel M Brooks
- Houston Museum of Natural Science, Department of Vertebrate Zoology, 5555 Hermann Park Drive, Houston, TX, 77030-1799, USA
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Mohammad Rezazadeh F, Saedi S, Rahmanifar F, Namavar MR, Dianatpour M, Tanideh N, Akhlaghi A, Niazi A, Arabi Monfared A, Tsutsui K, Jafarzadeh Shirazi MR, Tamadon A. Fast free of acrylamide clearing tissue (FACT) for clearing, immunolabelling and three-dimensional imaging of partridge tissues. Microsc Res Tech 2018; 81:1374-1382. [DOI: 10.1002/jemt.23078] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 04/29/2018] [Accepted: 06/07/2018] [Indexed: 11/11/2022]
Affiliation(s)
| | - Saman Saedi
- Department of Animal Science, College of Agriculture; Shiraz University; Shiraz Iran
| | - Farhad Rahmanifar
- Department of Basic Sciences, School of Veterinary Medicine; Shiraz University; Shiraz Iran
| | - Mohammad Reza Namavar
- Clinical Neurology Research Center, and Histomorphometry & Stereology Research Center; Shiraz University of Medical Sciences; Shiraz Iran
| | - Mehdi Dianatpour
- Stem Cells Technology Research Center; Shiraz University of Medical Sciences; Shiraz Iran
- Department of Medical Genetics, School of Pharmacy; Shiraz University of Medical Sciences; Shiraz Iran
| | - Nader Tanideh
- Stem Cells Technology Research Center; Shiraz University of Medical Sciences; Shiraz Iran
- Department of Pharmacology, School of Medicine; Shiraz University of Medical Sciences; Shiraz Iran
| | - Amir Akhlaghi
- Department of Animal Science, College of Agriculture; Shiraz University; Shiraz Iran
| | - Ali Niazi
- Institute of Biotechnology; Shiraz University; Shiraz Iran
| | - Ali Arabi Monfared
- Central Research Laboratory; Shiraz University of Medical Sciences; Shiraz Iran
| | - Kazuyoshi Tsutsui
- Department of Biology; Waseda University; Shinjuku-ku Tokyo, 162-8480 Japan
| | | | - Amin Tamadon
- The Persian Gulf Marine Biotechnology Research Center; The Persian Gulf Biomedical Sciences Research Institute, Bushehr University of Medical Sciences; Bushehr Iran
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