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Yang Y, Hong Y, Han J, Yang Z, Huang N, Xu B, Ma Z, Wang Q. Nerve growth factor alleviates arsenic-induced testicular injury by enhancing the function of Sertoli cells. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 280:116578. [PMID: 38861803 DOI: 10.1016/j.ecoenv.2024.116578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 06/01/2024] [Accepted: 06/08/2024] [Indexed: 06/13/2024]
Abstract
Sertoli cells (SCs) maintain testicular homeostasis and promote spermatogenesis by forming the blood-testis barrier (BTB) and secreting growth factors. The pro-proliferative and anti-apoptotic effects of nerve growth factor (NGF) on SCs have been proved previously. It is still unclear whether the damage effect of arsenic on testis is related to the inhibition of NGF expression, and whether NGF can mitigate arsenic-induced testicular damage by decreasing the damage of SCs induced by arsenic. Here, the lower expression of NGF in testes of arsenic exposed mice (freely drinking water containing 15 mg/l of NaAsO2) was observed through detection of Western blot and Real-time PCR. Subsequently, hematoxylin and eosin (HE) staining, Evans blue staining and transmission electron microscopy were used to evaluate the pathology, BTB permeability and tight junction integrity in testes of control mice, arsenic exposed mice (freely drinking water containing 15 mg/l of NaAsO2) and arsenic + NGF treated mice (freely drinking water containing 15 mg/l of NaAsO2 + intraperitoneal injection with 30 μg/kg of NGF), respectively. Evidently, spermatogenic tubule epithelial cells in testis of arsenic exposed mice were disordered and the number of cell layers was reduced, accompanied by increased permeability and damaged integrity of the tight junction in BTB, but these changes were less obvious in testes of mice treated with arsenic + NGF. In addition, the sperm count, motility and malformation rate of mice treated with arsenic + NGF were also improved. On the basis of the above experiments, the viability and apoptosis of primary cultured SCs treated with arsenic (10 μM NaAsO2) or arsenic + NGF (10 μM NaAsO2 + 100 ng/mL NGF) were detected by Cell counting kit-8 (CCK8) and transferase-mediated DUTP-biotin nick end labeling (TUNEL) staining, respectively. It is found that NGF ameliorated the decline of growth activity and the increase of apoptosis in arsenic-induced SCs. This remarkable biological effect that NGF inhibited the increase of Bax expression and the decrease of Bcl-2 expression in arsenic-induced SCs was also determined by western blot and Real-time PCR. Moreover, the decrease in transmembrane resistance (TEER) and the expression of tight junction proteins ZO-1 and occludin was mitigated in SCs induced by arsenic due to NGF treatment. In conclusion, the above results confirmed that NGF could ameliorate the injury effects of arsenic on testis, which might be related to the function of NGF to inhibit arsenic-induced SCs injury.
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Affiliation(s)
- Yanping Yang
- Department of Histology and Embryology, School of Basic Medicine, Guizhou Medical University, Guiyang, Guizhou 561113, PR China
| | - Yan Hong
- Department of Histology and Embryology, School of Basic Medicine, Guizhou Medical University, Guiyang, Guizhou 561113, PR China
| | - Jing Han
- Department of Histology and Embryology, School of Basic Medicine, Guizhou Medical University, Guiyang, Guizhou 561113, PR China
| | - Zhe Yang
- Department of Histology and Embryology, School of Basic Medicine, Guizhou Medical University, Guiyang, Guizhou 561113, PR China
| | - Nanmin Huang
- Department of Histology and Embryology, School of Basic Medicine, Guizhou Medical University, Guiyang, Guizhou 561113, PR China
| | - Binwei Xu
- Department of Histology and Embryology, School of Basic Medicine, Guizhou Medical University, Guiyang, Guizhou 561113, PR China
| | - Zhaolei Ma
- Department of Geriatrics, The Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou 550004, PR China.
| | - Qi Wang
- Department of Histology and Embryology, School of Basic Medicine, Guizhou Medical University, Guiyang, Guizhou 561113, PR China.
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Moretti E, Bonechi C, Signorini C, Corsaro R, Micheli L, Liguori L, Centini G, Collodel G. In Vitro Effects of Charged and Zwitterionic Liposomes on Human Spermatozoa and Supplementation with Liposomes and Chlorogenic Acid during Sperm Freezing. Cells 2024; 13:542. [PMID: 38534386 DOI: 10.3390/cells13060542] [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: 02/09/2024] [Revised: 03/05/2024] [Accepted: 03/18/2024] [Indexed: 03/28/2024] Open
Abstract
Semen handling and cryopreservation induce oxidative stress that should be minimized. In this study, human semen was supplemented during cryopreservation with formulations of handmade liposomes and chlorogenic acid (CGA), an antioxidant compound. Zwitterionic (ZL), anionic (AL), and cationic (CL) liposomes were synthesized and characterized. Three aliquots of swim-up-selected sperm were incubated with ZL, AL, and CL (1:10,000), respectively. The percentages of sperm with progressive motility, high mitochondrial membrane potential (MMP; JC-1), double-stranded DNA (dsDNA acridine orange), and acrosome integrity (Pisum sativum agglutinin) were assessed. Then, human semen was frozen using both 1:10,000 ZL and CGA as follows: freezing medium/empty ZL (EL), freezing medium/empty ZL/CGA in the medium (CGA + EL), freezing medium/CGA loaded ZL (CGA), freezing medium (CTR). The same sperm endpoints were evaluated. ZL were the most tolerated and used for semen cryopreservation protocols. All the supplemented samples showed better endpoints versus CTR (p < 0.001). In particular, spermatozoa from the CGA and CGA + EL A samples showed increased motility, dsDNA, and acrosome integrity versus CTR and EL (p < 0.001; motility EL vs. CGA + EL p < 0.05). ZL and CGA can improve post-thaw sperm quality, acting on both cold shock effect management and oxidative stress. These findings open new perspectives on human and animal reproduction.
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Affiliation(s)
- Elena Moretti
- Department of Molecular and Developmental Medicine, University of Siena, 53100 Siena, Italy
| | - Claudia Bonechi
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, 53100 Siena, Italy
| | - Cinzia Signorini
- Department of Molecular and Developmental Medicine, University of Siena, 53100 Siena, Italy
| | - Roberta Corsaro
- Department of Molecular and Developmental Medicine, University of Siena, 53100 Siena, Italy
| | - Lucia Micheli
- Department of Medicine, Surgery and Neuroscience, University of Siena, 53100 Siena, Italy
| | - Laura Liguori
- Department of Molecular and Developmental Medicine, University of Siena, 53100 Siena, Italy
| | - Gabriele Centini
- Department of Molecular and Developmental Medicine, University of Siena, 53100 Siena, Italy
- Obstetrics and Gynecological Clinic, University of Siena, 53100 Siena, Italy
| | - Giulia Collodel
- Department of Molecular and Developmental Medicine, University of Siena, 53100 Siena, Italy
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Stabile AM, Pistilli A, Moretti E, Bartolini D, Ruggirello M, Rende M, Castellini C, Mattioli S, Ponchia R, Tripodi SA, Collodel G. A Possible Role for Nerve Growth Factor and Its Receptors in Human Sperm Pathology. Biomedicines 2023; 11:3345. [PMID: 38137566 PMCID: PMC10742157 DOI: 10.3390/biomedicines11123345] [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: 10/12/2023] [Revised: 12/09/2023] [Accepted: 12/12/2023] [Indexed: 12/24/2023] Open
Abstract
Nerve growth factor (NGF) signalling affects spermatogenesis and mature sperm traits. In this paper, we aimed to evaluate the distribution and the role of NGF and its receptors (p75NTR and TrKA) on the reproductive apparatus (testis and epididymis) and sperm of fertile men (F) and men with different pathologies, namely varicocele (V) and urogenital infections (UGIs). We collected semen samples from 21 individuals (31-40 years old) subdivided as follows: V (n = 7), UGIs (n = 7), and F (n = 7). We submitted the semen samples to bacteriological analysis, leucocyte identification, and analysis of sperm parameters (concentration, motility, morphology, and viability). We determined the seminal plasma levels of NGF, interleukin 1β (IL-1β), and F2-isoprostanes (F2-IsoPs), and the gene and protein expression of NGF receptors on sperm. We also used immunofluorescence to examine NGF receptors on ejaculated sperm, testis, and epididymis. As expected, fertile men showed better sperm parameters as well as lower levels of NGF, F2-IsoPs, and IL-1β compared with men with infertility. Notably, in normal sperm, p75NTR and TrKA were localised throughout the entire tail. TrKA was also found in the post-acrosomal sheath. This localisation appeared different in patients with infertility: in particular, there was a strong p75NTR signal in the midpiece and the cytoplasmic residue or coiled tails of altered ejaculated sperm. In line with these findings, NGF receptors were intensely expressed in the epididymis and interstitial tissue of the testis. These data suggest the distinctive involvement of NGF and its receptors in the physiology of sperm from fertile men and men with infertility, indicating a possible role for new targeted treatment strategies.
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Affiliation(s)
- Anna Maria Stabile
- Department of Medicine and Surgery, Section of Human, Clinical and Forensic Anatomy, University of Perugia, 06132 Perugia, Italy; (A.M.S.); (A.P.); (M.R.); (M.R.)
| | - Alessandra Pistilli
- Department of Medicine and Surgery, Section of Human, Clinical and Forensic Anatomy, University of Perugia, 06132 Perugia, Italy; (A.M.S.); (A.P.); (M.R.); (M.R.)
| | - Elena Moretti
- Department of Molecular and Developmental Medicine, University of Siena, 53100 Siena, Italy;
| | - Desirée Bartolini
- Department of Pharmaceutical Sciences, Section of Biochemistry, University of Perugia, 06132 Perugia, Italy;
| | - Mariangela Ruggirello
- Department of Medicine and Surgery, Section of Human, Clinical and Forensic Anatomy, University of Perugia, 06132 Perugia, Italy; (A.M.S.); (A.P.); (M.R.); (M.R.)
| | - Mario Rende
- Department of Medicine and Surgery, Section of Human, Clinical and Forensic Anatomy, University of Perugia, 06132 Perugia, Italy; (A.M.S.); (A.P.); (M.R.); (M.R.)
| | - Cesare Castellini
- Department of Agricultural, Environmental and Food Science, University of Perugia, 06100 Perugia, Italy; (C.C.); (S.M.)
| | - Simona Mattioli
- Department of Agricultural, Environmental and Food Science, University of Perugia, 06100 Perugia, Italy; (C.C.); (S.M.)
| | - Rosetta Ponchia
- Unit of Medically Assisted Reproduction, Siena University Hospital, 53100 Siena, Italy;
| | - Sergio Antonio Tripodi
- Department of Pathology Unit, Azienda Ospedaliera Universitaria Senese, 53100 Siena, Italy;
| | - Giulia Collodel
- Department of Molecular and Developmental Medicine, University of Siena, 53100 Siena, Italy;
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Effects and Mechanisms Activated by Treatment with Cationic, Anionic and Zwitterionic Liposomes on an In Vitro Model of Porcine Pre-Pubertal Sertoli Cells. Int J Mol Sci 2023; 24:ijms24021201. [PMID: 36674712 PMCID: PMC9865246 DOI: 10.3390/ijms24021201] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 12/28/2022] [Accepted: 01/03/2023] [Indexed: 01/11/2023] Open
Abstract
Liposomes have been successfully used as drug-delivery vehicles, but there are no clinical studies on improved fertility and the few reported experimental studies have been performed in animal models far from humans. The aim of this paper was to study the effects of treatment with cationic, anionic and zwitterionic liposomes on our superior mammalian model of porcine prepubertal Sertoli cells (SCs) to find a carrier of in vitro test drugs for SCs. Porcine pre-pubertal SCs cultures were incubated with different liposomes. Viability, apoptosis/necrosis status (Annexin-V/Propidium iodide assay), immunolocalisation of β-actin, vimentin, the phosphorylated form of AMP-activated protein Kinase (AMPK)α and cell ultrastructure (Transmission Electron Microscopy, TEM) were analysed. Zwitterionic liposomes did not determine changes in the cell cytoplasm. The incubation with anionic and cationic liposomes modified the distribution of actin and vimentin filaments and increased the levels of the phosphorylated form of AMPKα. The Annexin/Propidium Iodide assay suggested an increase in apoptosis. TEM analysis highlighted a cytoplasmic vacuolisation. In conclusion, these preliminary data indicated that zwitterionic liposomes were the best carrier to use in an in vitro study of SCs to understand the effects of molecules or drugs that could have a clinical application in the treatment of certain forms of male infertility.
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Pu R, Liu J, Zhang A, Yang J, Zhang W, Long X, Ren X, Hua H, Shi D, Zhang W, Liu L, Liu Y, Wu Y, Bai Y, Cheng N. Modeling methods for busulfan-induced oligospermia and asthenozoospermia in mice: a systematic review and meta-analysis. J Assist Reprod Genet 2023; 40:19-32. [PMID: 36508035 PMCID: PMC9840741 DOI: 10.1007/s10815-022-02674-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 11/22/2022] [Indexed: 12/14/2022] Open
Abstract
OBJECTIVE Modeling methods for busulfan-induced oligoasthenozoospermia are controversial. We aimed to systematically review the modeling method of busulfan-induced oligospermia and asthenozoospermia, and analyze changes in various evaluation indicators at different busulfan doses over time. METHODS We searched the Cochrane Library, PubMed databases, Web of Science, the Chinese National Knowledge Infrastructure, and the Chinese Biomedical Literature Service System until April 9, 2022. Animal experiments of busulfan-induced spermatogenesis dysfunction were included and screened. The model mortality and parameters of the evaluation indicators were subjected to meta-analysis. RESULTS Twenty-nine animal studies were included (control/model: 669/1829). The mortality of mice increased with busulfan dose. Significant spermatogenesis impairment occurred within 5 weeks, regardless of busulfan dose (10-40 mg/kg). Testicular weight (weighted mean difference [WMD]: - 0.04, 95% CI: - 0.05, - 0.03), testicular index (WMD: - 2.10, 95% CI: - 2.43, - 1.76), and Johnsen score (WMD: - 4.67, 95% CI: - 5.99, - 3.35) were significantly decreased. The pooled sperm counts of the model group were reduced by 32.8 × 106/ml (WMD: - 32.8, 95% CI: - 44.34, - 21.28), and sperm motility decreased by 37% (WMD: - 0.37, 95% CI: - 0.47, - 0.27). Sperm counts decreased slightly (WMD: - 3.03, 95% CI: - 3.42, - 2.64) in an intratesticular injection of low-dose busulfan (4 - 6 mg/kg), and the model almost returned to normal after one seminiferous cycle. CONCLUSION The model using low-dose busulfan (10 - 20 mg/kg) returned to normal after 10 - 15 weeks. However, in some spermatogenesis cycles, testicular weight reduction and testicular spermatogenic function damage were not proportional to busulfan dose. Sperm counts and motility results in different studies had significant heterogeneity. Standard protocols for sperm assessment in animal models were needed to reduce heterogeneity between studies.
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Affiliation(s)
- Ruiyang Pu
- Department of Medical Zoology, School of Basic Medicine, Lanzhou University, Lanzhou, China
| | - Jing Liu
- The Reproductive Medicine Hospital of the First Hospital of Lanzhou University, Lanzhou, Gansu, China
- Key Laboratory of Reproductive Medicine and Embryo of Gansu Province, Lanzhou, China
| | - Aiping Zhang
- The Reproductive Medicine Hospital of the First Hospital of Lanzhou University, Lanzhou, Gansu, China
- Key Laboratory of Reproductive Medicine and Embryo of Gansu Province, Lanzhou, China
| | - Jingli Yang
- Institute of Epidemiology and Health Statistics, School of Public Health, Lanzhou University, Lanzhou, China
| | - Wei Zhang
- Department of Medical Zoology, School of Basic Medicine, Lanzhou University, Lanzhou, China
| | - Xianzhen Long
- Institute of Epidemiology and Health Statistics, School of Public Health, Lanzhou University, Lanzhou, China
| | - Xiaoyu Ren
- Department of Medical Zoology, School of Basic Medicine, Lanzhou University, Lanzhou, China
| | - Honghao Hua
- Institute of Epidemiology and Health Statistics, School of Public Health, Lanzhou University, Lanzhou, China
| | - Dian Shi
- Department of Medical Zoology, School of Basic Medicine, Lanzhou University, Lanzhou, China
| | - Wei Zhang
- The Reproductive Medicine Hospital of the First Hospital of Lanzhou University, Lanzhou, Gansu, China
- Key Laboratory of Reproductive Medicine and Embryo of Gansu Province, Lanzhou, China
| | - Lijun Liu
- The Reproductive Medicine Hospital of the First Hospital of Lanzhou University, Lanzhou, Gansu, China
- Key Laboratory of Reproductive Medicine and Embryo of Gansu Province, Lanzhou, China
| | - Yanyan Liu
- Institute of Epidemiology and Health Statistics, School of Public Health, Lanzhou University, Lanzhou, China
| | - Yuanqin Wu
- Institute of Epidemiology and Health Statistics, School of Public Health, Lanzhou University, Lanzhou, China
| | - Yana Bai
- Institute of Epidemiology and Health Statistics, School of Public Health, Lanzhou University, Lanzhou, China
| | - Ning Cheng
- Department of Medical Zoology, School of Basic Medicine, Lanzhou University, Lanzhou, China.
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Zhu H, Li G, Liu J, Xu X, Zhang Z. Gut microbiota is associated with the effect of photoperiod on seasonal breeding in male Brandt's voles (Lasiopodomys brandtii). MICROBIOME 2022; 10:194. [PMID: 36376894 PMCID: PMC9664686 DOI: 10.1186/s40168-022-01381-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 09/27/2022] [Indexed: 05/29/2023]
Abstract
BACKGROUND Seasonal breeding in mammals has been widely recognized to be regulated by photoperiod, but the association of gut microbiota with photoperiodic regulation of seasonal breeding has never been investigated. RESULTS In this study, we investigated the association of gut microbiota with photoperiod-induced reproduction in male Brandt's voles (Lasiopodomys brandtii) through a long-day and short-day photoperiod manipulation experiment and fecal microbiota transplantation (FMT) experiment. We found photoperiod significantly altered reproductive hormone and gene expression levels, and gut microbiota of voles. Specific gut microbes were significantly associated with the reproductive hormones and genes of voles during photoperiod acclimation. Transplantation of gut microbes into recipient voles induced similar changes in three hormones (melatonin, follicle-stimulating hormone, and luteinizing hormone) and three genes (hypothalamic Kiss-1, testicular Dio3, and Dio2/Dio3 ratio) to those in long-day and short-day photoperiod donor voles and altered circadian rhythm peaks of recipient voles. CONCLUSIONS Our study firstly revealed the association of gut microbiota with photoperiodic regulation of seasonal breeding through the HPG axis, melatonin, and Kisspeptin/GPR54 system. Our results may have significant implications for pest control, livestock animal breeding, and human health management. Video Abstract.
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Affiliation(s)
- Hanyi Zhu
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Guoliang Li
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jing Liu
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiaoming Xu
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhibin Zhang
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China.
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing, 100049, China.
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Whole-Genome Profile of Greek Patients with Teratozοοspermia: Identification of Candidate Variants and Genes. Genes (Basel) 2022; 13:genes13091606. [PMID: 36140773 PMCID: PMC9498395 DOI: 10.3390/genes13091606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 08/23/2022] [Accepted: 08/30/2022] [Indexed: 01/09/2023] Open
Abstract
Male infertility is a global health problem that affects a large number of couples worldwide. It can be categorized into specific subtypes, including teratozoospermia. The present study aimed to identify new variants associated with teratozoospermia in the Greek population and to explore the role of genes on which these were identified. For this reason, whole-genome sequencing (WGS) was performed on normozoospermic and teratozoospermic individuals, and after selecting only variants found in teratozoospermic men, these were further prioritized using a wide range of tools, functional and predictive algorithms, etc. An average of 600,000 variants were identified, and of them, 61 were characterized as high impact and 153 as moderate impact. Many of these are mapped in genes previously associated with male infertility, yet others are related for the first time to teratozoospermia. Furthermore, pathway enrichment analysis and Gene ontology (GO) analyses revealed the important role of the extracellular matrix in teratozoospermia. Therefore, the present study confirms the contribution of genes studied in the past to male infertility and sheds light on new molecular mechanisms by providing a list of variants and candidate genes associated with teratozoospermia in the Greek population.
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Expression of Nerve Growth Factor and Its Receptor TrkA in the Reproductive System of Adult Zebrafish. Vet Sci 2022; 9:vetsci9050225. [PMID: 35622754 PMCID: PMC9144415 DOI: 10.3390/vetsci9050225] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 04/29/2022] [Accepted: 05/03/2022] [Indexed: 02/04/2023] Open
Abstract
Nerve growth factor (NGF), a member of the neurotrophin family, has emerged as an active mediator in different crucial events in the peripheral and central nervous system. At the same time, several studies showed that this neurotrophin can also play a role in non-neuronal tissues (e.g., among gonads). In spite of a large number of studies present in mammals, investigations devoted to NGF and its receptor TrkA in the reproductive system of other animal models, such as teleost fish, are scarce. To increase our knowledge of NGF and its receptor in a vertebrate gonads model, the present report describes the expression patterns of ngf and trka mRNA in the testis and ovary of adult zebrafish. By using chromogenic and fluorescence in situ hybridization, we demonstrate that in the testis of adult zebrafish, ngf and its receptor trka are mainly expressed in spermatogony B and spermatocytes. In the ovary of this fish, ngf and trka are expressed at different stages of oocyte development. Altogether, these results show that this neurotrophin and its receptor have an important role in the reproductive system that is conserved during vertebrate evolution.
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Serum Nerve Growth Factor Levels as a Predictor of Bull Candidate Semen Quality of Madura Cattle. Vet Med Int 2022; 2022:7128384. [PMID: 35449725 PMCID: PMC9017486 DOI: 10.1155/2022/7128384] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 03/31/2022] [Indexed: 12/05/2022] Open
Abstract
Madura cattle are the germplasm of native cattle on the verge of extinction because of crossbreeding. Therefore, the present study was aimed to determine the serum nerve growth factor (NGF) concentration as a predictor of fresh ejaculate fertility parameters in Madura bull candidates. Eleven Madura bull candidates used for frozen semen production were selected for the study. Blood samples were collected using a vacutainer from the jugular vein for analyzing serum NGF and testosterone levels. Meanwhile, semen collection was conducted using an artificial vagina for sperm motility, viability, and concentration assessment. Data were analyzed to determine the correlation among variables and the linear regression of NGF concentration to other significant variables. The result showed that NGF had a significant correlation (p < 0.05) with testosterone levels, sperm motility, viability, and concentration. A significant correlation was observed between testosterone levels, sperm concentration, and sperm viability. The regression equation among significantly correlated variables was determined. For artificial insemination, suitable bull ejaculates for obtaining frozen semen should reach at least 2.12 ng/mL of NGF levels, with sperm viability, sperm concentration, and testosterone levels of more than 78.63%, 1,462.177 million/mL ejaculate, and 25.67 ng/mL, respectively. This is the first study to identify NGF as a predictor of male fertility in bull candidates of Madura cattle. Therefore, NGF levels could be used as a marker of male fertility in Madura bull cattle candidates. Thus, based on the minimum NGF levels, the ejaculate of Madura bull candidate that meets the requirements for frozen semen production could predict fertility.
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