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Yang D, Yuan L, Chen G, Chen S, Ma X, Xing Y, Song J. Expression and role of melatonin membrane receptors in the hypothalamic-pituitary-testicular axis of Tibetan sheep in a plateau pastoral area. PLoS One 2023; 18:e0290775. [PMID: 37878614 PMCID: PMC10599587 DOI: 10.1371/journal.pone.0290775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 08/16/2023] [Indexed: 10/27/2023] Open
Abstract
MTNR1A and MTNR1B, two high-affinity MT membrane receptors found in mammals, mediate the activity of MT on the HPGA to regulate animal reproduction. Nevertheless, the expression patterns and function of the MTNR1A and MTNR1B genes in the HPTA of seasonal estrus sheep and perennial estrus sheep have not been elucidated. We studied the expression of MTNR1A and MTNR1B in the hypothalamic-pituitary-testicular axis (HPTA) of Tibetan sheep at different reproductive stages using histochemistry, enzyme linked immunosorbent assay (ELSIA), scanning electron microscopy, transmission electron microscopy, quantitative Real-time PCR (qRT-PCR), and Western blot (WB), and analyzed the relationship between their expression and reproductive hormone receptors. We also compared relevant characteristics between seasonal Tibetan sheep and non-seasonal Small Tail Han sheep in the same pastoral area. The results showed that MTNR1A and MTNR1B were expressed in all tissues of the Tibetan sheep HPTA, and both were co-expressed in the cytoplasm of epididymis basal and halo cells located at common sites of the epididymis basement membrane, forming an immune barrier. The qRT-PCR analysis showed that not only MTNR1A but also N-acetyltransferase (AANAT), hydroxyindole-oxygen- methyltransferase (HIOMT), androgen receptor (AR), and estrogen receptor α (ERα) mRNA expression was significantly upregulated in the testis and epididymis of Tibetan sheep during the breeding season, whereas no clear upregulation of these genes was observed in the tissues of Small Tail Han sheep. MTNR1A and MTNR1B are important regulators of the HPTA in sheep. MTNR1A mediates seasonal estrus regulation in Tibetan sheep. Both MTNR1A and MTNR1B may play important roles in formation of the blood-epididymal barrier. The results of this study should help advance research on the mechanism of reproductive regulation of the HPTA in male animals and provide reference data for improving the reproductive rate of seasonal breeding animals.
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Affiliation(s)
- Dapeng Yang
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Ligang Yuan
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
- Gansu Key Laboratory of Animal Generational Physiology and Reproductive Regulation, Lanzhou, China
| | - Guojuan Chen
- Huangzhong District Animal Disease Control Center of Xining City, Xining City, Qinghai Province, China
| | - Shaoyu Chen
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Xiaojie Ma
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Yindi Xing
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Juanjuan Song
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
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Li Z, Zhang K, Zhou Y, Zhao J, Wang J, Lu W. Role of Melatonin in Bovine Reproductive Biotechnology. Molecules 2023; 28:4940. [PMID: 37446601 PMCID: PMC10343719 DOI: 10.3390/molecules28134940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 06/07/2023] [Accepted: 06/21/2023] [Indexed: 07/15/2023] Open
Abstract
Melatonin has profound antioxidant activity and numerous functions in humans as well as in livestock and poultry. Additionally, melatonin plays an important role in regulating the biological rhythms of animals. Combining melatonin with scientific breeding management has considerable potential for optimizing animal physiological functions, but this idea still faces significant challenges. In this review, we summarized the beneficial effects of melatonin supplementation on physiology and reproductive processes in cattle, including granulosa cells, oocytes, circadian rhythm, stress, inflammation, testicular function, spermatogenesis, and semen cryopreservation. There is much emerging evidence that melatonin can profoundly affect cattle. In the future, we hope that melatonin can not only be applied to cattle, but can also be used to safely and effectively improve the efficiency of animal husbandry.
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Affiliation(s)
- Zhiqiang Li
- Joint Laboratory of the Modern Agricultural Technology International Cooperation, Ministry of Education, Jilin Agricultural University, Changchun 130118, China; (Z.L.); (K.Z.); (Y.Z.); (J.Z.)
- Key Lab of Animal Production, Product Quality, and Security, Ministry of Education, Jilin Agricultural University, Changchun 130118, China
- College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China
| | - Kaiyan Zhang
- Joint Laboratory of the Modern Agricultural Technology International Cooperation, Ministry of Education, Jilin Agricultural University, Changchun 130118, China; (Z.L.); (K.Z.); (Y.Z.); (J.Z.)
- Key Lab of Animal Production, Product Quality, and Security, Ministry of Education, Jilin Agricultural University, Changchun 130118, China
- College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China
| | - Yuming Zhou
- Joint Laboratory of the Modern Agricultural Technology International Cooperation, Ministry of Education, Jilin Agricultural University, Changchun 130118, China; (Z.L.); (K.Z.); (Y.Z.); (J.Z.)
- Key Lab of Animal Production, Product Quality, and Security, Ministry of Education, Jilin Agricultural University, Changchun 130118, China
- College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China
| | - Jing Zhao
- Joint Laboratory of the Modern Agricultural Technology International Cooperation, Ministry of Education, Jilin Agricultural University, Changchun 130118, China; (Z.L.); (K.Z.); (Y.Z.); (J.Z.)
- Key Lab of Animal Production, Product Quality, and Security, Ministry of Education, Jilin Agricultural University, Changchun 130118, China
- College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China
| | - Jun Wang
- Joint Laboratory of the Modern Agricultural Technology International Cooperation, Ministry of Education, Jilin Agricultural University, Changchun 130118, China; (Z.L.); (K.Z.); (Y.Z.); (J.Z.)
- Key Lab of Animal Production, Product Quality, and Security, Ministry of Education, Jilin Agricultural University, Changchun 130118, China
- College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China
| | - Wenfa Lu
- Joint Laboratory of the Modern Agricultural Technology International Cooperation, Ministry of Education, Jilin Agricultural University, Changchun 130118, China; (Z.L.); (K.Z.); (Y.Z.); (J.Z.)
- Key Lab of Animal Production, Product Quality, and Security, Ministry of Education, Jilin Agricultural University, Changchun 130118, China
- College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China
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Duan H, Ge W, Wu J, Lv J, Li Z, Dong W, Du X, Zhang L, Zhang Y, Hu J, Zhao X. Melatonin regulates dihydrotestosterone formation via its membrane receptor in the epididymal epithelial cells of sheep. Theriogenology 2023; 198:273-281. [PMID: 36623430 DOI: 10.1016/j.theriogenology.2022.12.040] [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: 02/13/2022] [Revised: 12/23/2022] [Accepted: 12/27/2022] [Indexed: 12/31/2022]
Abstract
Both melatonin and androgen, which affect sperm fertility, are the important factors in epididymis of male animal. In the present study, we confirmed that melatonin regulates the formation of dihydrotestosterone (DHT) in sheep epididymides. Here, we investigated the localization and the expression levels of melatonin keys synthases AANAT and HIOMT, membrane receptors MT1 and MT2, and nuclear receptor RORα in sheep epididymides and testes. We also cultured epididymal epithelial cells and treated them with different concentrations of melatonin (10-11-10-7 M) and luzindole (10-5 M) and 4P-PDOT (10-5 M) to investigate whether melatonin is involved in the regulation of DHT formation and whether these effects are mediated through its receptor pathways. The results showed that AANAT, HIOMT, MT1, MT2, and RORα were differentially expressed between sheep epididymides and testes. In addition, melatonin is involved in mediating the formation of DHT in epididymal epithelial cells, and its influence on DHT is at least partially regulated by the melatonin receptor pathway. Our findings showed that melatonin regulates the functions of the testes and epididymides through an autocrine mechanism and regulates the formation of androgen in sheep epididymides via the receptor pathway. These results provide a basis for further exploring the regulatory mechanisms of melatonin in animal reproduction.
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Affiliation(s)
- Hongwei Duan
- Key Lab of Animal Generational Physiology and Reproductive Regulation of Gansu Province, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, PR China
| | - Wenbo Ge
- Key Lab of Animal Generational Physiology and Reproductive Regulation of Gansu Province, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, PR China; Key Lab of New Animal Drug Project of Gansu Province, Key Lab of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Animal Science and Veterinary Pharmaceutics, Chinese Academy of Agricultural Sciences, Lanzhou, 730050, PR China
| | - Jianxin Wu
- Key Lab of Animal Generational Physiology and Reproductive Regulation of Gansu Province, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, PR China
| | - Jianshu Lv
- Key Lab of Animal Generational Physiology and Reproductive Regulation of Gansu Province, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, PR China
| | - Zongshuai Li
- Key Lab of Animal Generational Physiology and Reproductive Regulation of Gansu Province, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, PR China
| | - Weitao Dong
- Key Lab of Animal Generational Physiology and Reproductive Regulation of Gansu Province, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, PR China
| | - Xianghong Du
- Key Lab of Animal Generational Physiology and Reproductive Regulation of Gansu Province, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, PR China
| | - Lihong Zhang
- Key Lab of Animal Generational Physiology and Reproductive Regulation of Gansu Province, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, PR China
| | - Yong Zhang
- Key Lab of Animal Generational Physiology and Reproductive Regulation of Gansu Province, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, PR China
| | - Junjie Hu
- Key Lab of Animal Generational Physiology and Reproductive Regulation of Gansu Province, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, PR China.
| | - Xingxu Zhao
- Key Lab of Animal Generational Physiology and Reproductive Regulation of Gansu Province, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, 730070, PR China.
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4
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Duan H, Yang S, Zeng J, Lv J, Zhang L, Du X, Hu J, Zhang Y, Zhao X. The effect of melatonin on sheep endometrial epithelial cell apoptosis through the receptor and non-receptor pathways. Gen Comp Endocrinol 2023; 333:114182. [PMID: 36455642 DOI: 10.1016/j.ygcen.2022.114182] [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: 10/08/2022] [Revised: 11/21/2022] [Accepted: 11/24/2022] [Indexed: 11/29/2022]
Abstract
Melatonin potentially regulates the female animal reproductive function, but its regulatory mechanism in the apoptosis of sheep endometrial epithelial cells (SEECs) remains to be elucidated. In the present study, immunofluorescence staining, western blotting, and quantitative real-time polymerase chain reaction were performed to detect the distribution of melatonin receptors (MT1 and MT2) in the uterus of sheep and the effect of melatonin via the receptor and non-receptor pathways on the apoptosis of SEECs in vitro. The results showed that melatonin inhibits the apoptosis of SEECs to varying degrees to regulate the expression of estrogen receptors (ERs) and progesterone receptors (PGR) via its interaction with MT1 and MT2. In addition, the ER antagonist partially relieved the inhibitory effect of melatonin on the apoptosis of SEECs, while the PGR antagonist did not. Thus, melatonin mediates endometrial epithelial apoptosis through the MT receptors and also by regulating estrogen function. This study provides evidence of the regulatory mechanism of melatonin on the physiological function of the sheep uterus.
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MESH Headings
- Female
- Animals
- Sheep
- Receptor, Melatonin, MT1/genetics
- Receptor, Melatonin, MT1/analysis
- Receptor, Melatonin, MT1/metabolism
- Receptor, Melatonin, MT2/analysis
- Receptor, Melatonin, MT2/metabolism
- Melatonin/pharmacology
- Melatonin/metabolism
- Epithelial Cells/metabolism
- Apoptosis
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Affiliation(s)
- Hongwei Duan
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou 730070, Gansu, China; Gansu Key Laboratory of Animal Generational Physiology and Reproductive Regulation, Lanzhou 730070, Gansu, China
| | - Shuai Yang
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou 730070, Gansu, China; Gansu Key Laboratory of Animal Generational Physiology and Reproductive Regulation, Lanzhou 730070, Gansu, China
| | - Jianlin Zeng
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou 730070, Gansu, China; Gansu Key Laboratory of Animal Generational Physiology and Reproductive Regulation, Lanzhou 730070, Gansu, China
| | - Jianshu Lv
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou 730070, Gansu, China; Gansu Key Laboratory of Animal Generational Physiology and Reproductive Regulation, Lanzhou 730070, Gansu, China
| | - Lihong Zhang
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou 730070, Gansu, China
| | - Xianghong Du
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou 730070, Gansu, China
| | - Junjie Hu
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou 730070, Gansu, China; Gansu Key Laboratory of Animal Generational Physiology and Reproductive Regulation, Lanzhou 730070, Gansu, China.
| | - Yong Zhang
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou 730070, Gansu, China; Gansu Key Laboratory of Animal Generational Physiology and Reproductive Regulation, Lanzhou 730070, Gansu, China
| | - Xingxu Zhao
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou 730070, Gansu, China; Gansu Key Laboratory of Animal Generational Physiology and Reproductive Regulation, Lanzhou 730070, Gansu, China.
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5
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Subacute Ruminal Acidosis as a Potential Factor that Induces Endometrium Injury in Sheep. Int J Mol Sci 2023; 24:ijms24021192. [PMID: 36674716 PMCID: PMC9861559 DOI: 10.3390/ijms24021192] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 01/03/2023] [Accepted: 01/04/2023] [Indexed: 01/11/2023] Open
Abstract
The demand for economic benefits has led to an increase in the proportion of high-concentrate (HC) feed in the ruminant diet, resulting in an increased incidence of subacute ruminal acidosis (SARA). During SARA, a high concentration of lipopolysaccharide (LPS) translocated in the rumen induces a systemic inflammatory response. Inflammatory diseases, such as endometritis and mastitis, are often associated with SARA; however, in sheep, the mechanism of the effect of SARA on the endometrium has rarely been reported. Therefore, the aim of this study was to investigate, for the first time, the influence of LPS translocation on endometrial tight junctions (TJs) during SARA in sheep. The results showed that LPS and TNFα levels in the ruminal fluid, serum, and endometrial tissue supernatant during SARA increased, transcription levels of TLR4, NFκB, and TNFα in the endometrium increased, the protein expression level of claudin-1 in the endometrium increased, and the protein expression level of occludin decreased. 17β-estradiol (E2) inhibits claudin-1 protein expression and promotes occludin expression, and progesterone (P4) promotes claudin-1 protein expression and inhibits occludin protein expression. E2 and P4 regulate claudin-1 and occludin protein expression through their receptor pathways. Here, we found that LPS hindered the regulatory effect of E2 and P4 on endometrial TJs by inhibiting their receptor expression. The results of this study indicate that HC feeding can cause SARA-induced LPS translocation in sheep, increase susceptibility to systemic inflammation, induce the endometrial inflammatory response, and cause endometrial epithelial TJ damage directly and/or by obstructing E2 and P4 function. LPS translocation caused by SARA has also been suggested to induce an endometrial inflammatory response, resulting in endometrial epithelial barrier damage and physiological dysfunction, which seriously affects ruminant production. Therefore, this study provides new evidence that SARA is a potential factor that induces systemic inflammation in ruminants. It provides theoretical support for research on the prevention of endometritis in ruminants.
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Ge W, Duan H, Zeng J, Zhao X, Li J, Hu J. Melatonin protects sheep endometrial epithelial cells against lipopolysaccharide-induced inflammation in vitro. Reprod Domest Anim 2022; 57:1602-1614. [PMID: 36018566 DOI: 10.1111/rda.14237] [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: 06/06/2022] [Revised: 08/17/2022] [Accepted: 08/24/2022] [Indexed: 11/28/2022]
Abstract
Melatonin has known anti-inflammatory effects. However, how melatonin protects sheep endometrial epithelial cells from inflammation remains unknown. In this study, we investigated the melatonin synthetase AANAT and HIOMT, and melatonin membrane receptors MT1 and MT2 distribution in sheep uterus. Using lipopolysaccharide (LPS)-stimulated sheep endometrial epithelial cells as an in vitro inflammation model. The results showed that melatonin attenuated the expression of inflammatory factors in a concentration-response manner. Melatonin also inhibited the LPS-stimulated phosphorylation of ERK1/2, JNK and NF-κB p65. This attenuation was partially blocked by luzindole (a nonspecific MT1 and MT2 inhibitor) or 4P-PDOT (specific MT2 inhibitor). In addition, the above inhibition of melatonin was abolished by the PI3K/AKT pathway inhibitor LY294002. It was concluded that melatonin had an inhibitory effect on LPS-induced endometrial epithelial cell inflammation in sheep, which was mediated by the activation of the PI3K/AKT pathway via melatonin receptors.
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Affiliation(s)
- Wenbo Ge
- Key Lab of New Animal Drug Project of Gansu Province, Key Lab of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Science of Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Hongwei Duan
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Jianling Zeng
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Xingxu Zhao
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Jianyong Li
- Key Lab of New Animal Drug Project of Gansu Province, Key Lab of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Science of Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Junjie Hu
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
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Ge W, Xiao L, Duan H, Zhao X, Li J, Hu J. Proteomic analysis of iTRAQ in melatonin-treated sheep epididymal epithelial cells. Reprod Domest Anim 2022; 57:1406-1417. [PMID: 35881670 DOI: 10.1111/rda.14217] [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: 05/19/2022] [Revised: 07/08/2022] [Accepted: 07/25/2022] [Indexed: 11/28/2022]
Abstract
During maturation, spermatozoa acquire motility and fertilizing capacity as they transit through the epididymis. Melatonin is a lipophilic hormone with multiple functions in regulating the fertility. Previous studies have shown that melatonin affected the capacitation or maturation of sperm in the epididymis. The aim of this study was to investigate the effects of melatonin on epididymal caput epithelial cells in sheep. In the study, we used iTRAQ labelling coupled with LC-MS/MS for quantitative identification of differentially expressed proteins in melatonin-treated sheep epididymal caput epithelial cells. We identified 69 differentially expressed protein; 41 were upregulated and 28 were downregulated in samples from sheep in melatonin treated. We validated the differential expression of a subset of these proteins using qPCR and Western blot. Gene ontology annotation identified that the differentially expressed proteins function in cellular processes and metabolic processes. Notably, five of the differentially expressed proteins as SOD1, COL1A1, PRM1, NQO2, and FN1 are involved in sperm migration and sperm maturation. KEGG enrichment analysis demonstrated significant enrichment in several cardiac-related pathways, such as "PI3K-Akt signaling pathway", "AGE-RAGE signaling pathway in diabetic complications", "ECM-receptor interaction", and "Ribosome". Our results suggest that candidate biomarker (SOD1, COL1A1, PRM1, NQO2, and FN1) discovery can aid in understanding sperm development and maturation in sheep. These results provide insights into the potential mechanisms of melatonin regulation of sperm maturation in epididymal caput epithelial cells.
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Affiliation(s)
- Wenbo Ge
- Key Lab of New Animal Drug Project of Gansu Province, Key Lab of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Science of Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Longfei Xiao
- Animal Science and Technology College, Beijing University of Agriculture, Beijing, China
| | - Hongwei Duan
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Xingxu Zhao
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Jianyong Li
- Key Lab of New Animal Drug Project of Gansu Province, Key Lab of Veterinary Pharmaceutical Development of Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Science of Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Junjie Hu
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
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Lwin T, Yang JL, Ngampramuan S, Viwatpinyo K, Chancharoen P, Veschsanit N, Pinyomahakul J, Govitrapong P, Mukda S. Melatonin ameliorates methamphetamine-induced cognitive impairments by inhibiting neuroinflammation via suppression of the TLR4/MyD88/NFκB signaling pathway in the mouse hippocampus. Prog Neuropsychopharmacol Biol Psychiatry 2021; 111:110109. [PMID: 32941923 DOI: 10.1016/j.pnpbp.2020.110109] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 09/01/2020] [Accepted: 09/11/2020] [Indexed: 02/08/2023]
Abstract
Methamphetamine (METH) is a highly addictive psychostimulant that causes significant health issues due to high prevalence of its illegal use. Chronic use of METH is associated with cognitive impairments in both human and animal studies, but the underlying mechanism remains unclear. METH-induced neuroinflammation is, potentially, one of the factors that causes cognitive impairments. Therefore, the present study aimed to assess whether melatonin could provide protection against inflammation, in a manner comparable to the anti-inflammatory agent, minocycline, with consequent improvements of METH-induced cognitive impairments and associated abnormalities in the mouse hippocampus. Results from the Morris water maze (MWM) test and the novel object recognition test (NORT) showed that melatonin given after METH injections could ameliorate both METH-induced spatial and recognition memory impairments. These memory impairments are associated with changes in the neuroinflammatory profiles, including IL-6, IL-1β, and TNF-α, both in the blood serum and hippocampus of adult mice. METH-treated mice also exhibited reactive astrocytes and activated microglia in the hippocampus. METH-induced activation of glial cells is associated with the activation of the TLR4/MyD88/NFκB signaling pathway. Moreover, melatonin administration led to recovery of these METH-induced markers to control levels. Thus, we conclude that melatonin could potentially be used as a cognitive enhancer and anti-inflammatory agent in the treatment of METH use disorder in humans.
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Affiliation(s)
- Thit Lwin
- Research Center for Neuroscience, Institute of Molecular Biosciences, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand; Department of Anatomy, Defence Services Medical Academy, Mingalardon, Yangon 11021, Myanmar
| | - Jenq-Lin Yang
- Institute for Translational Research in Biomedicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan
| | - Sukonthar Ngampramuan
- Research Center for Neuroscience, Institute of Molecular Biosciences, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand
| | - Kittikun Viwatpinyo
- Research Center for Neuroscience, Institute of Molecular Biosciences, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand
| | - Pongrung Chancharoen
- Research Center for Neuroscience, Institute of Molecular Biosciences, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand; Faculty of Allied Health Sciences, Burapha University, Seansuk, Chonburi 20131, Thailand
| | - Nisarath Veschsanit
- Research Center for Neuroscience, Institute of Molecular Biosciences, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand
| | - Jitrapa Pinyomahakul
- Research Center for Neuroscience, Institute of Molecular Biosciences, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand
| | - Piyarat Govitrapong
- Research Center for Neuroscience, Institute of Molecular Biosciences, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand; Department of Pharmacology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand; Chulabhorn Graduate Institute, Chulabhorn Royal Academy, Bangkok 10210, Thailand
| | - Sujira Mukda
- Research Center for Neuroscience, Institute of Molecular Biosciences, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand.
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9
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Feng R, Adeniran SO, Huang F, Li Y, Ma M, Zheng P, Zhang G. The ameliorative effect of melatonin on LPS-induced Sertoli cells inflammatory and tight junctions damage via suppression of the TLR4/MyD88/NF-κB signaling pathway in newborn calf. Theriogenology 2021; 179:103-116. [PMID: 34871925 DOI: 10.1016/j.theriogenology.2021.11.020] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 11/20/2021] [Accepted: 11/25/2021] [Indexed: 12/23/2022]
Abstract
The blood-testicular barrier (BTB) is involved in spermatogenesis, protects sperm development, and plays a crucial role in the reproductive process. Tight junctions (TJs) between Sertoli cells (SCs) are the key structure of (BTB), and if its structure is damaged, BTB function is affected. The cellular inflammation caused by Gram-negative bacteria affects the structural integrity of TJs. Melatonin (MT) has anti-inflammatory effects; however, the effect of MT in newborn calf SCs is unknown. Therefore, this experiment studied the protective effect of MT. The results showed that LPS upregulated TLR4, MyD88, and NF-κB expressions, in turn, activated the TLR4/MyD88/NF-κB signaling pathway, produced a large amount of IL-6 and IL-1β, downregulated the expression of ZO-1 and Occludin, and reduced the viability of SCs, which resulted in the inflammatory response of SCs and damage of TJs. The addition of MT decreased TLR4, MyD88, and NF-κB expressions, it then inhibited the activation of TLR4/MyD88/NF-κB signaling pathway, downregulated the expression of IL-6 and IL-1β, upregulated the expression of ZO-1 and Occludin, and increased the cell viability, thereby alleviating the inflammatory response of SCs, and restored the TJs structure. Overall, our results reveal that MT can alleviate LPS-induced in newborn calf SCs Inflammation and TJs injury through TLR4/MyD88/NF-κB signaling pathway.
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Affiliation(s)
- Rui Feng
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, Heilongjiang, China
| | - Samson O Adeniran
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, Heilongjiang, China
| | - Fushuo Huang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, Heilongjiang, China
| | - Yulong Li
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, Heilongjiang, China
| | - Mingjun Ma
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, Heilongjiang, China
| | - Peng Zheng
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, Heilongjiang, China
| | - Guixue Zhang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, Heilongjiang, China.
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10
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Wu Y, Li H, Qin Y. S100A4 promotes the progression of lipopolysaccharide-induced acute epididymitis in mice†. Biol Reprod 2021; 102:1213-1224. [PMID: 32072170 DOI: 10.1093/biolre/ioaa022] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Revised: 02/11/2020] [Accepted: 02/17/2020] [Indexed: 12/19/2022] Open
Abstract
S100A4 has been suggested to be a critical regulator of tumor metastasis and is implicated in the progression of inflammation. The aim of this study is to investigate the expression and possible role of S100A4 in epididymitis. Using a mouse model of epididymitis induced by the injection of lipopolysaccharide (LPS) in the deferent duct, we found that LPS administration induced an upregulation of S100a4 transcription (P < 0.05) and a recruitment of S100A4 positive cells in the epididymal interstitium of wild type (WT) mice. Co-immunofluorescence showed that S100A4 was mainly expressed by granulocytes, CD4 lymphocytes, and macrophages. Deficiency of S100A4 reduced epididymal pathological reaction and the mRNA levels of the pro-inflammatory cytokines IL-1β and TNF-α (P < 0.01), suggesting that S100A4 promotes the progression of epididymitis. Furthermore, S100A4 deficiency alleviated the decline of sperm motility and rectified the abnormal expression of sperm membrane protein AMAD3, which suggested that in the progression of epididymitis, S100A4 aggravates the damage to sperm vitality. In addition, both Ki-67 marked cell proliferation and transferase-mediated dUTP-biotin nick end labeling detected cell apoptosis were reduced in S100a4-/- mice compared with WT mice after LPS treatment, indicating that S100A4 promotes both cell proliferation and cell apoptosis in epididymitis. Overall, these results demonstrate that S100A4 promotes the progression of LPS-induced epididymitis and facilitates a decline in sperm vitality, and its function may be related to the process of cell proliferation and apoptosis during inflammation.
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Affiliation(s)
- Yingjie Wu
- National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, People's Republic of China
| | - Haoran Li
- National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, People's Republic of China
| | - Yinghe Qin
- National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, People's Republic of China
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11
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Zhang Y, Cong P, Tong C, Jin H, Liu Y, Hou M. Melatonin pretreatment alleviates blast-induced oxidative stress in the hypothalamic-pituitary-gonadal axis by activating the Nrf2/HO-1 signaling pathway. Life Sci 2021; 280:119722. [PMID: 34153300 DOI: 10.1016/j.lfs.2021.119722] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 06/02/2021] [Accepted: 06/09/2021] [Indexed: 01/14/2023]
Abstract
Although melatonin has been demonstrated to exert a potent antioxidant effect, the ability of melatonin to alleviate blast-induced oxidative stress in the hypothalamic-pituitary-gonadal (HPG) axis remains unclear. This study aimed to elucidate the effects and underlying mechanism of melatonin pretreatment on the HPG axis disrupted by blast injury. Sixty C57BL/6 mice were randomly divided into control, blast, and blast + melatonin groups for behavioral experiments. The elevated maze experiment, open field experiment, and Morris Water Maze experiment were carried out on the 7th, 14th and 28th day after the blast injury. Fifty Sprague Dawley rats were randomly divided into control, blast, blast + melatonin, and blast + melatonin + luzindole groups for hormone assays and molecular and pathological experiments. Blood samples were used for HPG axis hormone detection and ELISA assays, and tissue samples were used to detect oxidative stress, inflammation, apoptosis, and stress-related protein levels. The results showed that melatonin pretreatment alleviated blast-induced behavioral abnormalities in mice and maintained the HPG axis hormone homeostasis in rats. Additionally, melatonin significantly reduced MDA5 expression and increased the expression of Nrf2/HO-1. Moreover, melatonin significantly inhibited NF-κB expression and upregulated IL-10 expression, and it reversed the blast-induced high expression of caspase-3 and Bax and the low expression of Bcl-2. Furthermore, luzindole counteracted melatonin inhibition of NF-κB and upregulated Nrf2/HO-1. Melatonin significantly alleviated blast-induced HPG axis hormone dyshomeostasis, behavioral abnormalities, oxidative stress, inflammation, and apoptosis, which may be achieved by upregulating the Nrf2/HO-1 signaling pathway. Our study suggested that melatonin pretreatment is a potential treatment for blast-induced HPG axis hormonal and behavioral abnormalities.
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Affiliation(s)
- Yin Zhang
- Graduate School, Dalian Medical University, Dalian, Liaoning Province 116044, China
| | - Peifang Cong
- Department of Emergency Medicine, The General Hospital of Northern Theater Command, Laboratory of Rescue Center of Severe Trauma PLA, Shenyang, Liaoning Province 116044, China
| | - Changci Tong
- Department of Emergency Medicine, The General Hospital of Northern Theater Command, Laboratory of Rescue Center of Severe Trauma PLA, Shenyang, Liaoning Province 116044, China
| | - Hongxu Jin
- Department of Emergency Medicine, The General Hospital of Northern Theater Command, Laboratory of Rescue Center of Severe Trauma PLA, Shenyang, Liaoning Province 116044, China
| | - Yunen Liu
- The Second Affiliated Hospital of Shenyang Medical College, The Veterans General Hospital of Liaoning Province, No. 20 Beijiu Road, Heping District, Shenyang 110001, China; Shenyang Medical College, No. 146, Huanghe North Street, Shenyang 110034, China.
| | - Mingxiao Hou
- Graduate School, Dalian Medical University, Dalian, Liaoning Province 116044, China; Department of Emergency Medicine, The General Hospital of Northern Theater Command, Laboratory of Rescue Center of Severe Trauma PLA, Shenyang, Liaoning Province 116044, China.
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12
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Ashrafizadeh M, Najafi M, Kavyiani N, Mohammadinejad R, Farkhondeh T, Samarghandian S. Anti-Inflammatory Activity of Melatonin: a Focus on the Role of NLRP3 Inflammasome. Inflammation 2021; 44:1207-1222. [PMID: 33651308 DOI: 10.1007/s10753-021-01428-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 01/21/2021] [Accepted: 01/27/2021] [Indexed: 12/19/2022]
Abstract
Melatonin is a hormone of the pineal gland that contributes to the regulation of physiological activities, such as sleep, circadian rhythm, and neuroendocrine processes. Melatonin is found in several plants and has pharmacological activities including antioxidant, anti-inflammatory, hepatoprotective, cardioprotective, and neuroprotective. It also has shown therapeutic efficacy in treatment of cancer and diabetes. Melatonin affects several molecular pathways to exert its protective effects. The NLRP3 inflammasome is considered a novel target of melatonin. This inflammasome contributes to enhanced level of IL-1β, caspase-1 activation, and pyroptosis stimulation. The function of NLRP3 inflammasome has been explored in various diseases, including cancer, diabetes, and neurological disorders. By inhibiting NLRP3, melatonin diminishes inflammation and influences various molecular pathways, such as SIRT1, microRNA, long non-coding RNA, and Wnt/β-catenin. Here, we discuss these molecular pathways and suggest that melatonin-induced inhibition of NLRP3 should be advanced in disease therapy.
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Affiliation(s)
- Milad Ashrafizadeh
- Faculty of Engineering and Natural Sciences, Sabanci University, Orta Mahalle, Üniversite Caddesi No. 27, Orhanlı, Tuzla, 34956, Istanbul, Turkey
- Sabanci University Nanotechnology Research and Application Center (SUNUM), Tuzla, 34956, Istanbul, Turkey
| | - Masoud Najafi
- Radiology and Nuclear Medicine Department, School of Paramedical Sciences, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Nasim Kavyiani
- Department of Basic Science, Faculty of Veterinary Medicine Faculty, Islamic Azad Branch, University of Shushtar, Shushtar, Khuzestan, Iran
| | - Reza Mohammadinejad
- Pharmaceutics Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
| | - Tahereh Farkhondeh
- Medical Toxicology and Drug Abuse Research Center (MTDRC), Birjand University of Medical Sciences, Birjand, Iran
- Faculty of Pharmacy, Birjand University of Medical Sciences, Birjand, Iran
| | - Saeed Samarghandian
- Noncommunicable Diseases Research Center, Neyshabur University of Medical Sciences, Neyshabur, Iran.
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13
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Xia D, Yang L, Li Y, Chen J, Zhang X, Wang H, Zhai S, Jiang X, Meca G, Wang S, Huang L, Zhu S, Fu Y, Ma W, Zhu Y, Ye H, Wang W. Melatonin alleviates Ochratoxin A-induced liver inflammation involved intestinal microbiota homeostasis and microbiota-independent manner. JOURNAL OF HAZARDOUS MATERIALS 2021; 413:125239. [PMID: 33582472 DOI: 10.1016/j.jhazmat.2021.125239] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 01/19/2021] [Accepted: 01/23/2021] [Indexed: 06/12/2023]
Abstract
Melatonin (MEL) shows an anti-inflammatory effect and regulates intestinal microbiota communities in animals and humans; Ochratoxin A (OTA) induces liver inflammation through intestinal microbiota. However, it remains to know whether MEL alleviates the liver inflammation induced by OTA. In this study, MEL reversed various adverse effects induced by OTA. MEL recovered the swarming and motility of intestinal microbiota, decreased the accumulation of lipopolysaccharide (LPS), enhanced the tight junction proteins of jejunum and cecum segments; ultimately alleviated OTA-induced liver inflammation in ducks. However, it is worth noting that MEL still had positive effects on the OTA-exposed ducks after antibiotic treatment. These results suggest that both the maintenance of intestinal microbiota homeostasis and intestinal microbiota-independent manner involved the MEL anti-inflammatory function in OTA-induced liver inflammation. MEL represent a promising protective approach for OTA, even other mycotoxins.
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Affiliation(s)
- Daiyang Xia
- Guangdong Provincial Key Laboratory of Animal Nutrition and Regulation, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Lin Yang
- Guangdong Provincial Key Laboratory of Animal Nutrition and Regulation, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Yu Li
- Guangdong Provincial Key Laboratory of Animal Nutrition and Regulation, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Jianying Chen
- Guangdong Provincial Key Laboratory of Animal Nutrition and Regulation, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Xiufen Zhang
- Guangdong Provincial Key Laboratory of Animal Nutrition and Regulation, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Heng Wang
- Guangdong Provincial Key Laboratory of Animal Nutrition and Regulation, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Shuangshuang Zhai
- College of Animal Science, Yangtze University, Jingzhou 434000, China
| | - Xianzhi Jiang
- Microbiome Research Center, Moon (Guangzhou) Biotech Co. Ltd. Guangzhou 510535, China
| | - Giuseppe Meca
- Laboratory of Food Chemistry and Toxicology, Faculty of Pharmacy, University of Valencia, Av. Vicent Andrés Estellés s/n, Burjassot 46100, Spain
| | | | - Liang Huang
- Guangdong Provincial Key Laboratory of Animal Nutrition and Regulation, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Shanshan Zhu
- Guangdong Provincial Key Laboratory of Animal Nutrition and Regulation, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Yang Fu
- Guangdong Provincial Key Laboratory of Animal Nutrition and Regulation, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Weiqing Ma
- Guangdong Provincial Key Laboratory of Animal Nutrition and Regulation, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Yongwen Zhu
- Guangdong Provincial Key Laboratory of Animal Nutrition and Regulation, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Hui Ye
- Guangdong Provincial Key Laboratory of Animal Nutrition and Regulation, College of Animal Science, South China Agricultural University, Guangzhou 510642, China
| | - Wence Wang
- Guangdong Provincial Key Laboratory of Animal Nutrition and Regulation, College of Animal Science, South China Agricultural University, Guangzhou 510642, China.
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14
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Hu J, Ge W, Xiao L, Zeng J, Lv J, Ding Z, Wang W, Duan H, Li F. Assessment of progesterone synthesis and its regulation role on dihydrotestosterone secretion in sheep epididymis. Gene 2021; 790:145699. [PMID: 33964380 DOI: 10.1016/j.gene.2021.145699] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 04/08/2021] [Accepted: 04/30/2021] [Indexed: 10/21/2022]
Abstract
Progesterone (P4) is an anti-androgen compound whose role in sperm maturation and functionality remains unclear in sheep. Here, we aimed to investigate the regulation mechanism of P4 on the epididymal secretion of dihydrotestosterone (DHT). To this end, we performed enzyme-linked immunosorbent assays, immunohistochemical staining, western blotting, and quantitative real-time polymerase chain reaction to detect P4 concentration as well as StAR, P450scc, and 3β-HSD expression in sheep epididymis. Besides, cauda epithelial cells were cultured at different concentrations of P4 (10-9-10-5 g ml-1) as well as with or without the P4 receptor (PGR) inhibitor RU486 (10-7 M) or the PI3K-AKT inhibitor LY294006 (10-7 M) to explore the effect of P4 on DHT secretion and the underlying regulatory mechanism. The results showed that the caput, corpus, and cauda of sheep epididymis could synthesize P4 but had different synthesis ability. The PGR expression levels were the highest in the cauda, followed by the corpus. In vitro cell culture showed that P4 inhibition of DHT secretion and 5α-reductase 1 and 2 expression in epididymal epithelial cells could be moderately mitigated by RU486 but not by LY294002. Our results indicated that the paracrine and autocrine P4 could affect the secretion of DHT in epididymal cells through PGR. Overall, this study provides new data regarding the involvement of P4 in sperm maturation and functionality in sheep.
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Affiliation(s)
- Junjie Hu
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Wenbo Ge
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Longfei Xiao
- Animal Science and Technology College, Beijing University of Agriculture, Beijing, China
| | - Jianlin Zeng
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Jianshu Lv
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Ziqiang Ding
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Wenjuan Wang
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Hongwei Duan
- College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China.
| | - Fadi Li
- Animal Science and Technology College, Gansu Agricultural University, Lanzhou, China.
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15
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Nakamura Y, Asama R, Tabata T, Morita K, Maruyama T, Kondo A, Ishii J. Comparative analyses of site-directed mutagenesis of human melatonin MTNR1A and MTNR1B receptors using a yeast fluorescent biosensor. Biotechnol Bioeng 2020; 118:863-876. [PMID: 33095446 DOI: 10.1002/bit.27609] [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: 06/26/2020] [Revised: 10/22/2020] [Accepted: 10/22/2020] [Indexed: 11/08/2022]
Abstract
Melatonin is an indoleamine neurohormone made by the pineal gland. Its receptors, MTNR1A and MTNR1B, are members of the G-protein-coupled receptor (GPCR) family and are involved in sleep, circadian rhythm, and mood disorders, and in the inhibition of cancer growth. These receptors, therefore, represent significant molecular targets for insomnia, circadian sleep disorders, and cancer. The yeast Saccharomyces cerevisiae is an attractive host for assaying agonistic activity for human GPCR. We previously constructed a GPCR-based biosensor employing a high-sensitivity yeast strain that incorporated both a chimeric yeast-human Gα protein and a bright fluorescent reporter gene (ZsGreen). Similar approaches have been used for simple and convenient measurements of various GPCR activities. In the current study, we constructed a fluorescence-based yeast biosensor for monitoring the signaling activation of human melatonin receptors. We used this system to analyze point mutations, including previously unreported mutations of the consensus sequences of MTNR1A and MTNR1B melatonin receptors and compared their effects. Most mutations in the consensus sequences significantly affected the signaling capacities of both receptors, but several mutations showed differences between these subtype receptors. Thus, this yeast biosensor holds promise for revealing the functions of melatonin receptors.
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Affiliation(s)
- Yasuyuki Nakamura
- Engineering Biology Research Center, Kobe University, Kobe, Japan.,Graduate School of Science, Technology and Innovation, Kobe University, Kobe, Japan
| | - Ririka Asama
- Graduate School of Science, Technology and Innovation, Kobe University, Kobe, Japan
| | - Takuya Tabata
- Graduate School of Science, Technology and Innovation, Kobe University, Kobe, Japan
| | - Kenta Morita
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, Kobe, Japan
| | - Tatsuo Maruyama
- Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, Kobe, Japan
| | - Akihiko Kondo
- Engineering Biology Research Center, Kobe University, Kobe, Japan.,Graduate School of Science, Technology and Innovation, Kobe University, Kobe, Japan.,Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, Kobe, Japan.,Center for Sustainable Resource Science, RIKEN, Yokohama, Japan
| | - Jun Ishii
- Engineering Biology Research Center, Kobe University, Kobe, Japan.,Graduate School of Science, Technology and Innovation, Kobe University, Kobe, Japan
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