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Effect of cryopreservation techniques on proliferation and apoptosis of cultured equine ovarian tissue. Theriogenology 2019; 126:88-94. [DOI: 10.1016/j.theriogenology.2018.11.034] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2018] [Revised: 11/30/2018] [Accepted: 11/30/2018] [Indexed: 12/20/2022]
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52
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Wang-Yang L, You-Liang Z, Tiao L, Peng Z, Wu-Ji X, Xiao-Long L, Xin-Yu Q, Hui X. Pretreatment with Lithospermic Acid Attenuates Oxidative Stress- induced Apoptosis in Bone Marrow-derived Mesenchymal Stem Cells via Anti-oxidation and Activation of PI3K/Akt Pathway. DIGITAL CHINESE MEDICINE 2019. [DOI: 10.1016/j.dcmed.2019.05.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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53
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Nicotine inhibits murine Leydig cell differentiation and maturation via regulating Hedgehog signal pathway. Biochem Biophys Res Commun 2019; 510:1-7. [DOI: 10.1016/j.bbrc.2018.11.107] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Accepted: 11/16/2018] [Indexed: 11/24/2022]
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54
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Jeng HAC, Lin WY, Chao MR, Lin WY, Pan CH. Semen quality and sperm DNA damage associa -revised - final-finalted with oxidative stress in relation to exposure to polycyclic aromatic hydrocarbons. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2019; 53:1221-1228. [PMID: 30623705 DOI: 10.1080/10934529.2018.1528035] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Accepted: 05/28/2018] [Indexed: 06/09/2023]
Abstract
The cross-sectional study aimed to assess whether oxidative stress induced by exposure to polycyclic aromatic hydrocarbons (PAHs) affect semen quality and sperm DNA integrity. A total of 106 who met the inclusion criteria, were recruited from a coke-oven plant during their annual health checkup. The human subjects were grouped into the high exposure group, the low exposure group and the control based on PAH concentrations surrounding their employment locations. Semen quality, oxidative stress status, and sperm DNA damage [DNA fragmentation and 8-hydroxy-2'-deoxyguanosine (8-oxodGuo)] were assessed. Urinary 1-hydroxypyren (1-OHP) was used to assess human subject exposure to PAHs. The high exposure group experienced significantly lower sperm motility and normal morphology than the control (P = 0.046 and 0.049, respectively). The high exposure group also had significantly higher 8-oxoGuo concentrations in sperm than the control (P = 0.027). Urinary 1-OHP concentration was associated with decreased motility and less normal morphology, along with increased sperm oxidative damage and ROS concentrations. Oxidative stress induced by exposure to PAHs was associated with decreased sperm quality.
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Affiliation(s)
- Hueiwang Anna C Jeng
- a School of Community and Environmental Health , College of Health Sciences, Old Dominion University , Norfolk , Virginia , USA
| | - Wen Y Lin
- b Department of Occupational Medicine , Kaohsiung Medical University Hospital , Kaohsiung , Taiwan
| | - Mu R Chao
- c Department of Occupational Safety and Health , Chung Shan Medical University , Taichung , Taiwan
| | - Wen Y Lin
- b Department of Occupational Medicine , Kaohsiung Medical University Hospital , Kaohsiung , Taiwan
| | - Chih H Pan
- d Institute of Occupational Safety and Health, Council of Labor Affairs, Executive Yuan , Taipei , Taiwan
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Wang YQ, Li YW, Chen QL, Liu ZH. Long-term exposure of xenoestrogens with environmental relevant concentrations disrupted spermatogenesis of zebrafish through altering sex hormone balance, stimulating germ cell proliferation, meiosis and enhancing apoptosis. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 244:486-494. [PMID: 30366296 DOI: 10.1016/j.envpol.2018.10.079] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 10/16/2018] [Accepted: 10/16/2018] [Indexed: 06/08/2023]
Abstract
Environmental estrogens are capable of interfering with the spermatogenesis and fertility of fish. However in natural waters, these chemicals are more likely to occur as a combination rather than a single stressor. Whether and how the mixture of xenoestrogens with environmental relevant concentrations may affect fish spermatogenesis remains largely unknown. In this study, male zebrafish adults were administered to 17alpha-ethinylestradiol (EE2) and a mixture of xenoestrogens (Mix (E2, EE2, DES, 4-t-OP, 4-NP and BPA)), with the estrogenic potency equivalent to EE2. After a 60-day exposures, elevated mRNA levels of vitellogenin 1 (vtg1) and estrogen receptor 1 (esr1) in the liver of fish in both treated groups were observed. Moreover, the plasma level of E2 declined significantly in the Mix group and the ratio of 11-KT/E2 was significantly elevated in both treated groups. Consistently, the mRNA level of P450 side-chain cleavage (scc) in the EE2 group and ovarian type aromatase (cyp19a1a) in the Mix group was significantly suppressed. In addition, decreased gonadosomatic index and sperm count in the fish of Mix group were present. Furthermore, increased number of the proliferating germ cells (such as spermatogonia and spermatocytes) was observed in the fish of both groups, suggesting a stimulated germ cell proliferation and meiosis. Accordingly, both exposures significantly up-regulated the mRNA levels of genes in mitosis (cyclinb1) and meiosis (cyp26a1 in EE2 group, aldh1a2, cyp26a1, sycp3 and spo11 in Mix). In addition, decreased number of spermatozoa and increased number of TUNEL-positive signals were present in the testis of fish in the Mix group, indicating an enhanced apoptosis. Further analyses demonstrated the significant elevated expressions of tnfrsf1a and the ratio of tnfrsf1a/tnfrsf1b in the Mix group, suggesting an elevated apoptosis in the testis of fish in the Mix group via extrinsic pathway. The present study greatly extends our understanding of the underlying mechanisms of the reproductive toxicity of xenoestrogens on fish.
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Affiliation(s)
- Ya-Qin Wang
- Chongqing Key Laboratory of Animal Biology, College of Life Sciences, Chongqing Normal University, Chongqing 401331, China
| | - Ying-Wen Li
- Chongqing Key Laboratory of Animal Biology, College of Life Sciences, Chongqing Normal University, Chongqing 401331, China
| | - Qi-Liang Chen
- Chongqing Key Laboratory of Animal Biology, College of Life Sciences, Chongqing Normal University, Chongqing 401331, China
| | - Zhi-Hao Liu
- Chongqing Key Laboratory of Animal Biology, College of Life Sciences, Chongqing Normal University, Chongqing 401331, China.
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56
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Pajokh M, Talaei-Khozani T, Bordbar H, Mesbah F. Apoptosis, Autophagy, and Necrosis in Murine Embryonic Gonadal Ridges and Neonatal Ovaries: An Animal Model. IRANIAN JOURNAL OF MEDICAL SCIENCES 2019; 44:35-43. [PMID: 30666074 PMCID: PMC6330520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
BACKGROUND In mammalian ovaries, loss of over two-thirds of germ cells happens due to cell death. Nonetheless, the exact mechanism of cell death has yet to be determined. The present basic practical study was designed to detect 3 types of programmed cell death, namely apoptosis, autophagy, and necrosis, in murine embryonic gonadal ridges and neonatal ovaries. METHODS Twenty gonadal ridges and ovaries from female mouse embryos 13.5 days post coitum and newborn mice 1 day postnatal were collected. The TUNEL assay was performed to evaluate apoptosis. The interplay of autophagy was evaluated by immunohistochemistry for beclin-1. Necrotic cell death was analyzed by propidium iodide (PI) staining. The count and percentage of the labeled oocytes in the gonadal ridges and ovaries were evaluated and compared using the independent t test and one-way ANOVA. A P value less than 0.05 was considered statistically significant. RESULTS We detected TUNEL-positive reaction in the embryonic germ cells and in the small and large oocytes of the neonatal ovaries. The germ cells and small oocytes reacted to beclin-1. PI absorption was detected in the embryonic germ cells and the large oocytes of the neonatal ovaries, but not in the small oocytes. The percentage of the TUNEL-positive and PI-labeled oocytes in the gonadal ridges was significantly higher than that in the neonatal ovaries (P<0.01 and P=0.01). In the neonatal ovaries, the percentage of the beclin-1-labeled oocytes was significantly higher than that in the embryonic phase (P<0.01). CONCLUSION We showed that all 3 types of programmed cell death, namely apoptosis, autophagy, and necrosis, accounted for embryonic and neonatal germ-cell loss. Our observations demonstrated a potential role for necrosis, particularly in the embryonic gonadal ridge in comparison to the neonatal ovary, in mice.
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Ristić N, Nestorović N, Manojlović-Stojanoski M, Trifunović S, Ajdžanović V, Filipović B, Pendovski L, Milošević V. Adverse effect of dexamethasone on development of the fetal rat ovary. Fundam Clin Pharmacol 2018; 33:199-207. [PMID: 30216532 DOI: 10.1111/fcp.12415] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 08/06/2018] [Accepted: 09/10/2018] [Indexed: 11/30/2022]
Abstract
Dexamethasone (Dx) is often used in obstetric practice to promote fetal lung maturation and to prevent respiratory distress syndrome when the risk of preterm delivery persists. This therapy enables survival of the newborn, but also is associated with deleterious effects on the offspring, such as reproductive disorders. The aim of this study was to determine specifically whether prenatal exposure to Dx disturbs the physiological balance between proliferation and apoptosis of germinative cells (GC) in the ovary of 19- and 21-day-old fetuses and thus induces developmental programming of the female reproductive system. Pregnant Wistar rats (n = 10/group), separated into control (vehicle) and Dx-treated (0.5 mg/kg body mass) groups, received injections on gestational days 16, 17, and 18. Exposure to Dx lowered the volume of the fetal ovary by 30% (P < 0.05) in 21-day-old fetuses, as well as the total number of GC in the ovary by 21% (P < 0.05). When compared to the controls, in Dx-exposed fetuses, the total number of PCNA-positive GC was 27% lower at 19 days and 71% lower at 21 days old (P < 0.05), while total numbers of caspase-3-positive GC were 2.3-fold and 34% higher, respectively (P < 0.05). Our results demonstrate that prenatal exposure to Dx diminished proliferation but increased the rate of germinative cell apoptosis, with consequently reduced total germinative cell number and ovary volume. Impairment of fetal oogenesis and fewer GC in the fetal ovary compromise the oogonial stock and thus may constitute a risk of female fertility.
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Affiliation(s)
- Nataša Ristić
- Department of Cytology, Institute for Biological Research"Siniša Stanković", University of Belgrade, 11060, Belgrade, Serbia
| | - Nataša Nestorović
- Department of Cytology, Institute for Biological Research"Siniša Stanković", University of Belgrade, 11060, Belgrade, Serbia
| | - Milica Manojlović-Stojanoski
- Department of Cytology, Institute for Biological Research"Siniša Stanković", University of Belgrade, 11060, Belgrade, Serbia
| | - Svetlana Trifunović
- Department of Cytology, Institute for Biological Research"Siniša Stanković", University of Belgrade, 11060, Belgrade, Serbia
| | - Vladimir Ajdžanović
- Department of Cytology, Institute for Biological Research"Siniša Stanković", University of Belgrade, 11060, Belgrade, Serbia
| | - Branko Filipović
- Department of Cytology, Institute for Biological Research"Siniša Stanković", University of Belgrade, 11060, Belgrade, Serbia
| | | | - Verica Milošević
- Department of Cytology, Institute for Biological Research"Siniša Stanković", University of Belgrade, 11060, Belgrade, Serbia
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58
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Tang HM, Tang HL. Anastasis: recovery from the brink of cell death. ROYAL SOCIETY OPEN SCIENCE 2018; 5:180442. [PMID: 30839720 PMCID: PMC6170572 DOI: 10.1098/rsos.180442] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 08/23/2018] [Indexed: 05/11/2023]
Abstract
Anastasis is a natural cell recovery phenomenon that rescues cells from the brink of death. Programmed cell death such as apoptosis has been traditionally assumed to be an intrinsically irreversible cascade that commits cells to a rapid and massive demolition. Interestingly, recent studies have demonstrated recovery of dying cells even at the late stages generally considered immutable. Here, we examine the evidence for anastasis in cultured cells and in animals, review findings illuminating the potential mechanisms of action, discuss the challenges of studying anastasis and explore new strategies to uncover the function and regulation of anastasis, the identification of which has wide-ranging physiological, pathological and therapeutic implications.
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Affiliation(s)
- Ho Man Tang
- Institute for Basic Biomedical Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
- School of Life Sciences, Chinese University of Hong Kong, Shatin, Hong Kong
| | - Ho Lam Tang
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
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59
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Yadav PK, Tiwari M, Gupta A, Sharma A, Prasad S, Pandey AN, Chaube SK. Germ cell depletion from mammalian ovary: possible involvement of apoptosis and autophagy. J Biomed Sci 2018; 25:36. [PMID: 29681242 PMCID: PMC5911955 DOI: 10.1186/s12929-018-0438-0] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Accepted: 04/17/2018] [Indexed: 12/19/2022] Open
Abstract
Mammalian ovary contains millions of germ cells during embryonic life but only few of them are culminated into oocytes that achieve meiotic competency just prior to ovulation. The majority of germ cells are depleted from ovary through several pathways. Follicular atresia is one of the major events that eliminate germ cells from ovary by engaging apoptotic as well as non-apoptotic pathways of programmed cell death. Apoptosis is characterized by several morphological changes that include cell shrinkage, nuclear condensation, membrane blebbing and cytoplasmic fragmentation by both mitochondria- as well as death receptor-mediated pathways in encircling granulosa cells and oocyte. Although necroapoptosis have been implicated in germ cell depletion, autophagy seems to play an active role in the life and death decisions of ovarian follicles. Autophagy is morphologically characterized by intracellular reorganization of membranes and increased number of autophagic vesicles that engulf bulk cytoplasm as well as organelles. Autophagy begins with the encapsulation of cytoplasmic constituents in a membrane sac known as autophagosomes. The autophagic vesicles are then destroyed by the lysosomal enzymes such as hydrolases that results in follicular atresia. It seems that apoptosis as well as autophagy could play active roles in germ cells depletion from ovary. Hence, it is important to prevent these two pathways in order to retain the germ cells in ovary of several mammalian species that are either threatened or at the verge of extinction. The involvement of apoptosis and autophagy in germ cell depletion from mammalian ovary is reviewed and possible pathways have been proposed.
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Affiliation(s)
- Pramod K Yadav
- Cell Physiology Laboratory, Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, 221005, UP, India
| | - Meenakshi Tiwari
- Cell Physiology Laboratory, Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, 221005, UP, India
| | - Anumegha Gupta
- Cell Physiology Laboratory, Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, 221005, UP, India
| | - Alka Sharma
- Cell Physiology Laboratory, Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, 221005, UP, India
| | - Shilpa Prasad
- Cell Physiology Laboratory, Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, 221005, UP, India
| | - Ashutosh N Pandey
- Cell Physiology Laboratory, Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, 221005, UP, India
| | - Shail K Chaube
- Cell Physiology Laboratory, Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, 221005, UP, India.
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60
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Ghosh S, Mukherjee S. Testicular germ cell apoptosis and sperm defects in mice upon long-term high fat diet feeding. J Cell Physiol 2018; 233:6896-6909. [PMID: 29665058 DOI: 10.1002/jcp.26581] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 03/01/2018] [Indexed: 12/29/2022]
Abstract
The growing prevalence of male infertility is a matter of serious concern. One of the putative causes being nutritional excess from continuous consumption of high fat diet (HFD) leading to insulin resistance albeit the specific relationship is not fully understood. Besides, there are many contradictions in the available literature on the subject. Therefore, we sought to characterize in detail the effects of HFD upon testicular function and sperm quality in mice with particular focus on isolated testicular germ cells and spermatozoa, respectively. In this study, we treated 8-week old male Swiss albino mice with HFD for the duration of 5 months; control animals were reared on standard diet. We observed HFD induced progressive deterioration of testicular histoarchitecture leading to disruption of seminiferous tubules, increased vacuolization, and partial to complete tubular atrophy. Time dependent adverse effects on sperm count, motility, and morphology were noticed. Interestingly, numerous anomalies were detectable in sperm head and tail structures reflecting loss of reproductive capacity due to HFD. Maximal tissue and sperm damage was conspicuous at the endpoint, prompting us to examine oxidative stress markers. Enhanced intracellular reactive oxygen species (ROS) generation, augmentation of prooxidant activities, and compromised testicular antioxidant defences clearly implied conditions of oxidative stress in long-term HFD treated mice. This was concomitant with the onset of abnormally enhanced testicular germ cell apoptosis involving the mitochondrial intrinsic pathway. Thus, our findings revealed that ROS mediated deregulation of testicular germ cell apoptosis is critical in male reproductive impairment due to diet induced obesity.
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Affiliation(s)
- Songita Ghosh
- Endocrinology and Metabolism Laboratory, Department of Zoology (Centre for Advanced Studies), School of Life Sciences, Visva-Bharati (A Central University), Santiniketan, West Bengal, India
| | - Sutapa Mukherjee
- Endocrinology and Metabolism Laboratory, Department of Zoology (Centre for Advanced Studies), School of Life Sciences, Visva-Bharati (A Central University), Santiniketan, West Bengal, India
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61
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Qin Y, Liu L, He Y, Ma W, Zhu H, Liang M, Hao H, Qin T, Zhao X, Wang D. Testicular injection of busulfan for recipient preparation in transplantation of spermatogonial stem cells in mice. Reprod Fertil Dev 2018; 28:1916-1925. [PMID: 26111862 DOI: 10.1071/rd14290] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Accepted: 05/22/2015] [Indexed: 01/15/2023] Open
Abstract
Intraperitoneal busulfan injections are used to prepare recipients for spermatogonial stem cell (SSC) transplantation but they are associated with haematopoietic toxicity. Testicular injections of busulfan have been proposed to overcome this limitation. To date, testicular injections have not been studied in the mouse model. Therefore, in the present study we used ICR mice as recipients for SSC transplantation and prepared these mice by testicular injection of busulfan on both sides (2, 3, 4 or 6mgkg-1 per side). Following this, donor germ cells expressing red fluorescent protein (RFP) from transgenic C57BL/6J male mice were transplanted into recipients via the efferent duct on Days 16-17 after busulfan treatment. Positive control mice were prepared by intraperitoneal injection of 40mgkg-1 busulfan and negative control mice were treated with bilateral testicular injection of 50% dimethyl sulfoxide. On Day 49 after transplantation, recipient mice that were RFP-positive by in vivo imaging were mated with ICR female mice. Donor-derived germ cell colonies with red fluorescence were observed on Day 60 after transplantation, and donor-derived offspring were obtained. The results demonstrated that endogenous germ cells were successfully eliminated in the seminiferous tubules via testicular busulfan administration, and that exogenous SSCs successfully undergo spermatogenesis in the testes of recipient mice prepared by testicular injections of busulfan. In addition to its effects on recipient preparation, this method was safe in rodents and could possibly be adapted for use in other species.
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Affiliation(s)
- Yusheng Qin
- The Key Laboratory for Farm Animal Genetic Resources and Utilisation of Ministry of Agriculture of China, Institute of Animal Science, Chinese Academy of Agriculture Sciences, Beijing 100193, China
| | - Ling Liu
- The Key Laboratory for Farm Animal Genetic Resources and Utilisation of Ministry of Agriculture of China, Institute of Animal Science, Chinese Academy of Agriculture Sciences, Beijing 100193, China
| | - Yanan He
- The Key Laboratory for Farm Animal Genetic Resources and Utilisation of Ministry of Agriculture of China, Institute of Animal Science, Chinese Academy of Agriculture Sciences, Beijing 100193, China
| | - Wenzhi Ma
- Key Laboratory of Fertility Preservation and Maintenance of Ministry of Education and Key Laboratory of Reproduction and Heredity of Ningxia Hui Autonomous Region, Ningxia Medical University, Yinchuan, 750004, China
| | - Huabin Zhu
- The Key Laboratory for Farm Animal Genetic Resources and Utilisation of Ministry of Agriculture of China, Institute of Animal Science, Chinese Academy of Agriculture Sciences, Beijing 100193, China
| | - Mingyuan Liang
- College of Animal Science and Technology, Jilin Agriculture University, Changchun, 130118, China
| | - Haisheng Hao
- The Key Laboratory for Farm Animal Genetic Resources and Utilisation of Ministry of Agriculture of China, Institute of Animal Science, Chinese Academy of Agriculture Sciences, Beijing 100193, China
| | - Tong Qin
- The Key Laboratory for Farm Animal Genetic Resources and Utilisation of Ministry of Agriculture of China, Institute of Animal Science, Chinese Academy of Agriculture Sciences, Beijing 100193, China
| | - Xueming Zhao
- The Key Laboratory for Farm Animal Genetic Resources and Utilisation of Ministry of Agriculture of China, Institute of Animal Science, Chinese Academy of Agriculture Sciences, Beijing 100193, China
| | - Dong Wang
- The Key Laboratory for Farm Animal Genetic Resources and Utilisation of Ministry of Agriculture of China, Institute of Animal Science, Chinese Academy of Agriculture Sciences, Beijing 100193, China
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62
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Supplementation of freezing media with stromal cell-derived factor-1α preserves human sperm from cryodamage. Cryobiology 2017; 79:37-42. [PMID: 28947251 DOI: 10.1016/j.cryobiol.2017.09.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2017] [Revised: 09/15/2017] [Accepted: 09/21/2017] [Indexed: 01/03/2023]
Abstract
The destructive effects of sperm cryopreservation result in reduced sperm motility and increased apoptosis. Oocytes, endometrium, and follicular fluid express stromal cell-derived factor-1 alpha (SDF-1α) or C-X-C motif chemokine ligand 12 (CXCL12) while its specific receptor chemokine, CXC motif receptor 4 (CXCR4) is expressed in the head of sperm. SDF-1α can increase sperm motility and preserve normal mitochondrial status. The present study intends to investigate whether the addition of SDF-1α to freezing extender can facilitate cryosurvival of spermatozoa and how SDF-1α protects spermatozoa against damages during cryopreservation. In this study, we collected 22 semen samples from healthy donors and treated them with different concentrations of SDF-1α, followed by cryopreservation for one month. We measured sperm motility by CASA, mitochondrial ROS generation by flow cytometry using the probe MitoSOX Red™ (MSR) to measure mitochondrial superoxide anion (O2-•), DNA fragmentation by flow cytometry according to the TUNEL kit, and expressions of Bcl-2 and Bax by RT-qPCR in freeze-thawed sperm. The results showed that SDF-1α attenuated mitochondrial ROS generation at different doses, particularly the 250 ng/ml treated samples which, in turn, reduced the expressions of pro-apoptotic genes such as Bax. Eventually, SDF-1α reduced DNA fragmentation and ameliorated sperm motility in the 1-100 ng/ml treated samples during cryopreservation. The present study, for the first time, demonstrated that SDF-1α dose-dependently moderated oxidative stress injury in human sperm by reduction of mitochondrial ROS generation. It could subsequently cause a decrease in apoptosis during freeze-thawing and protect human spermatozoa from cryodamage.
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63
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Martín Muñoz P, Anel-López L, Ortiz-Rodríguez JM, Álvarez M, de Paz P, Balao da Silva C, Rodríguez Martinez H, Gil MC, Anel L, Peña FJ, Ortega Ferrusola C. Redox cycling induces spermptosis and necrosis in stallion spermatozoa while the hydroxyl radical (OH•) only induces spermptosis. Reprod Domest Anim 2017; 53:54-67. [DOI: 10.1111/rda.13052] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 07/10/2017] [Indexed: 11/30/2022]
Affiliation(s)
- P Martín Muñoz
- Laboratory of Equine Reproduction and Equine Spermatology; Veterinary Teaching Hospital; University of Extremadura; Cáceres Spain
| | - L Anel-López
- Reproduction and Obstetrics Department of Animal Medicine and Surgery; University of León; León Spain
| | - JM Ortiz-Rodríguez
- Laboratory of Equine Reproduction and Equine Spermatology; Veterinary Teaching Hospital; University of Extremadura; Cáceres Spain
| | - M Álvarez
- Reproduction and Obstetrics Department of Animal Medicine and Surgery; University of León; León Spain
| | - P de Paz
- Department of Molecular Biology; University of León; León Spain
| | - C Balao da Silva
- Portalagre Polytechnic Institute; Superior Agriculture School of Elvas; Elvas Portugal
| | - H Rodríguez Martinez
- Department of Clinical and Experimental Medicine; Faculty of Medicine & Health Sciences; Linköping University; Linköping Sweden
| | - MC Gil
- Laboratory of Equine Reproduction and Equine Spermatology; Veterinary Teaching Hospital; University of Extremadura; Cáceres Spain
| | - L Anel
- Reproduction and Obstetrics Department of Animal Medicine and Surgery; University of León; León Spain
| | - FJ Peña
- Laboratory of Equine Reproduction and Equine Spermatology; Veterinary Teaching Hospital; University of Extremadura; Cáceres Spain
| | - C Ortega Ferrusola
- Reproduction and Obstetrics Department of Animal Medicine and Surgery; University of León; León Spain
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Gebel J, Tuppi M, Krauskopf K, Coutandin D, Pitzius S, Kehrloesser S, Osterburg C, Dötsch V. Control mechanisms in germ cells mediated by p53 family proteins. J Cell Sci 2017:jcs.204859. [PMID: 28794013 DOI: 10.1242/jcs.204859] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Germ cells are totipotent and, in principle, immortal as they are the source for new germ cells in each generation. This very special role requires tight quality control systems. The p53 protein family constitutes one of the most important quality surveillance systems in cells. Whereas p53 has become famous for its role as the guardian of the genome in its function as the most important somatic tumor suppressor, p63 has been nicknamed 'guardian of the female germ line'. p63 is strongly expressed in resting oocytes and responsible for eliminating those that carry DNA double-strand breaks. The third family member, p73, acts later during oocyte and embryo development by ensuring correct assembly of the spindle assembly checkpoint. In addition to its role in the female germ line, p73 regulates cell-cell contacts between developing sperm cells and supporting somatic cells in the male germ line. Here, we review the involvement of the p53 protein family in the development of germ cells with a focus on quality control in the female germ line and discuss medical implications for cancer patients.
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Affiliation(s)
- Jakob Gebel
- Institute of Biophysical Chemistry and Center for Biomolecular Magnetic Resonance, Goethe University, Max von Laue-Str. 9, Frankfurt am Main 60438, Germany
| | - Marcel Tuppi
- Institute of Biophysical Chemistry and Center for Biomolecular Magnetic Resonance, Goethe University, Max von Laue-Str. 9, Frankfurt am Main 60438, Germany
| | - Katharina Krauskopf
- Institute of Biophysical Chemistry and Center for Biomolecular Magnetic Resonance, Goethe University, Max von Laue-Str. 9, Frankfurt am Main 60438, Germany
| | - Daniel Coutandin
- Institute of Biophysical Chemistry and Center for Biomolecular Magnetic Resonance, Goethe University, Max von Laue-Str. 9, Frankfurt am Main 60438, Germany
| | - Susanne Pitzius
- Institute of Biophysical Chemistry and Center for Biomolecular Magnetic Resonance, Goethe University, Max von Laue-Str. 9, Frankfurt am Main 60438, Germany
| | - Sebastian Kehrloesser
- Institute of Biophysical Chemistry and Center for Biomolecular Magnetic Resonance, Goethe University, Max von Laue-Str. 9, Frankfurt am Main 60438, Germany
| | - Christian Osterburg
- Institute of Biophysical Chemistry and Center for Biomolecular Magnetic Resonance, Goethe University, Max von Laue-Str. 9, Frankfurt am Main 60438, Germany
| | - Volker Dötsch
- Institute of Biophysical Chemistry and Center for Biomolecular Magnetic Resonance, Goethe University, Max von Laue-Str. 9, Frankfurt am Main 60438, Germany
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Enriched endoplasmic reticulum-mitochondria interactions result in mitochondrial dysfunction and apoptosis in oocytes from obese mice. J Anim Sci Biotechnol 2017; 8:62. [PMID: 28781772 PMCID: PMC5537973 DOI: 10.1186/s40104-017-0195-z] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 06/27/2017] [Indexed: 12/23/2022] Open
Abstract
Background Maternal obesity alters oocytes and subsequent fetal metabolism. An increasing number of studies have shown that the endoplasmic reticulums (ER) or mitochondria have important effects on oocyte quality, but there has been no study of the effect of mitochondria-associated ER membranes (MAMs) on oocyte quality. The present study was designed to assess whether the level of MAM and MAM-related proteins were different in oocytes from obese and control mice. Results First, oocytes from mice with high-fat-diet (HFD)-induced obesity had higher levels (either greater numbers or a higher proportion for the same numbers) of MAM than oocytes from control mice. The abundance of MAM-related proteins in oocytes from obese mice was significantly greater at both the messenger RNA and protein levels, including inositol 1,4,5-trisphosphate receptor, type 1 (IP3R1), inositol 1,4,5-trisphosphate receptor, type 2 (IP3R2) and phosphofurin acidic cluster sorting protein 2 (PACS-2). Further, there was an increase in mitochondrial Ca2+ ([Ca2+]m) which was associated with increased apoptosis and compromised cytoplasmic maturation in oocytes from obese mice. Down-regulation of MAM-related protein IP3R1 in oocytes from obese mice decreased [Ca2+]m and apoptosis and improved cytoplasmic maturation but did not reduce the overall MAM level. However, down-regulating MAM-related protein PACS-2 in oocytes from obese mice did reduce the level of MAM and [Ca2+]m, which decreased the rate of apoptosis and improved cytoplasmic maturation of oocytes from obese mice. Conclusions It is possible that enriched MAM could increase [Ca2+]m, and this increase has been found to be associated with increased apoptosis and compromised cytoplasmic maturation in oocytes from obese mice. This finding suggests a novel therapeutic target for obesity-induced oocyte defects. Electronic supplementary material The online version of this article (doi:10.1186/s40104-017-0195-z) contains supplementary material, which is available to authorized users.
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A high-fat diet impairs reproduction by decreasing the IL1β level in mice treated at immature stage. Sci Rep 2017; 7:567. [PMID: 28373640 PMCID: PMC5428732 DOI: 10.1038/s41598-017-00505-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 02/28/2017] [Indexed: 02/05/2023] Open
Abstract
Obesity causes low-grade inflammation that is involved in male infertility. Interleukin 1 beta (IL1β) plays an important role in this process. A high-fat diet (HFD) is the most common cause of obesity. However, the effect of a HFD on IL1β and its consequence in reproduction remain unclear. We established a HFD model in mice treated at immature stage (mice-TIS) and mice treated at mature stage (mice-TMS). Surprisingly, we found that a HFD decreased IL1β levels and was accompanied by an increase in testosterone in mice-TIS, while the reverse results were observed in mice-TMS. In addition, a HFD caused a reduction in testis macrophages and in the expression of inflammasome-related genes and proteins in mice-TIS. Furthermore, we found that IL1β inhibited testosterone secretion through down-regulating the gene expression of P450SCC and P450c17. However, the influence on mice-TIS that were induced by a HFD was recovered by stopping the HFD. In this study, we are the first to report that a HFD impairs the reproductive system by decreasing IL1β and enhancing testosterone levels in mice-TIS, which are different from the effects in mice-TMS. This provides new ideas for the treatment of obesity-induced infertility.
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Panigrahi SK, Manterola M, Wolgemuth DJ. Meiotic failure in cyclin A1-deficient mouse spermatocytes triggers apoptosis through intrinsic and extrinsic signaling pathways and 14-3-3 proteins. PLoS One 2017; 12:e0173926. [PMID: 28301569 PMCID: PMC5354389 DOI: 10.1371/journal.pone.0173926] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 02/28/2017] [Indexed: 12/25/2022] Open
Abstract
Cyclin A1 (Ccna1), a member of the mammalian A type cyclins, is most abundantly expressed in spermatocytes and is essential for spermatogenesis in the mouse. Ccna1- deficient spermatocytes arrest at late meiotic prophase and undergo apoptosis. To further delineate the mechanisms and key factors involved in this process, we have examined changes in expression of genes involved in both intrinsic and extrinsic signaling pathways that trigger apoptosis in the mutant spermatocytes. Our results show that both pathways are involved, and that the factors involved in the intrinsic pathway were expressed earlier than those involved in the extrinsic pathway. We have also begun to identify in vivo Ccna1-interacting proteins, using an unbiased biochemical approach, and identified 14-3-3, a key regulator of apoptosis, as a Ccna1-interacting protein. Expression levels of 14-3-3 proteins remain unchanged between wild type and mutant testes but there were differences in the subcellular distribution. In wild type control, 14-3-3 is detected in both cytosolic and nuclear fractions whereas it is restricted to the cytoplasm in mutant testes. This differential distribution of 14-3-3 may contribute to the induction of apoptosis in Ccna1-deficient spermatocytes. These results provide insight into the apoptotic mechanisms and pathways that are triggered when progression through the meiotic cell cycle is defective in male gametogenesis.
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Affiliation(s)
- Sunil K. Panigrahi
- Departments of Genetics & Development, Columbia University Medical Center, New York, New York, United States of America
| | - Marcia Manterola
- Departments of Genetics & Development, Columbia University Medical Center, New York, New York, United States of America
- Program of Human Genetics, ICBM, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Debra J. Wolgemuth
- Departments of Genetics & Development, Columbia University Medical Center, New York, New York, United States of America
- Obstetrics & Gynecology, Columbia University Medical Center, New York, New York, United States of America
- Institute of Human Nutrition, Columbia University Medical Center, New York, New York, United States of America
- Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York, United States of America
- * E-mail:
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69
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CDK5RAP2 Is Required to Maintain the Germ Cell Pool during Embryonic Development. Stem Cell Reports 2017; 8:198-204. [PMID: 28162995 PMCID: PMC5312265 DOI: 10.1016/j.stemcr.2017.01.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 01/03/2017] [Accepted: 01/04/2017] [Indexed: 11/23/2022] Open
Abstract
Gene products linked to microcephaly have been studied foremost for their role in brain development, while their function in the development of other organs has been largely neglected. Here, we report the critical role of Cdk5rap2 in maintaining the germ cell pool during embryonic development. We highlight that infertility in Cdk5rap2 mutant mice is secondary to a lack of spermatogenic cells in adult mice as a result of an early developmental defect in the germ cells through mitotic delay, prolonged cell cycle, and apoptosis. Microcephaly-linked protein CDK5RAP2 is also key for germ cell development Cdk5rap2 mutant mice display early germ cell depletion and subsequent sterility Cdk5rap2 mutant germ cells undergo mitotic delay, prolonged cell cycle, and apoptosis
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Martin JH, Bromfield EG, Aitken RJ, Nixon B. Biochemical alterations in the oocyte in support of early embryonic development. Cell Mol Life Sci 2017; 74:469-485. [PMID: 27604868 PMCID: PMC11107538 DOI: 10.1007/s00018-016-2356-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 08/28/2016] [Accepted: 09/01/2016] [Indexed: 01/01/2023]
Abstract
Notwithstanding the enormous reproductive potential encapsulated within a mature mammalian oocyte, these cells present only a limited window for fertilization before defaulting to an apoptotic cascade known as post-ovulatory oocyte aging. The only cell with the capacity to rescue this potential is the fertilizing spermatozoon. Indeed, the union of these cells sets in train a remarkable series of events that endows the oocyte with the capacity to divide and differentiate into the trillions of cells that comprise a new individual. Traditional paradigms hold that, beyond the initial stimulation of fluctuating calcium (Ca2+) required for oocyte activation, the fertilizing spermatozoon plays limited additional roles in the early embryo. While this model has now been drawn into question in view of the recent discovery that spermatozoa deliver developmentally important classes of small noncoding RNAs and other epigenetic modulators to oocytes during fertilization, it is nevertheless apparent that the primary responsibility for oocyte activation rests with a modest store of maternally derived proteins and mRNA accumulated during oogenesis. It is, therefore, not surprising that widespread post-translational modifications, in particular phosphorylation, hold a central role in endowing these proteins with sufficient functional diversity to initiate embryonic development. Indeed, proteins targeted for such modifications have been linked to oocyte activation, recruitment of maternal mRNAs, DNA repair and resumption of the cell cycle. This review, therefore, seeks to explore the intimate relationship between Ca2+ release and the suite of molecular modifications that sweep through the oocyte to ensure the successful union of the parental germlines and ensure embryogenic fidelity.
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Affiliation(s)
- Jacinta H Martin
- Discipline of Biological Sciences and Priority Research Center for Reproductive Science, School of Environmental and Life Sciences, The University of Newcastle, University Drive, Callaghan, NSW, 2308, Australia.
| | - Elizabeth G Bromfield
- Discipline of Biological Sciences and Priority Research Center for Reproductive Science, School of Environmental and Life Sciences, The University of Newcastle, University Drive, Callaghan, NSW, 2308, Australia
| | - R John Aitken
- Discipline of Biological Sciences and Priority Research Center for Reproductive Science, School of Environmental and Life Sciences, The University of Newcastle, University Drive, Callaghan, NSW, 2308, Australia
| | - Brett Nixon
- Discipline of Biological Sciences and Priority Research Center for Reproductive Science, School of Environmental and Life Sciences, The University of Newcastle, University Drive, Callaghan, NSW, 2308, Australia
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71
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Microscopic Morphology and Apoptosis of Ovarian Tissue after Cryopreservation using a Vitrification Method in Post-Hatching Turkey Poults, Meleagris gallopavo. J Poult Sci 2017; 54:303-311. [PMID: 32908441 PMCID: PMC7477267 DOI: 10.2141/jpsa.0170033] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
The objectives of this study were to examine morphological changes of oogonia and primordial follicles in the ovaries of turkey poults within the first week after hatching, and to evaluate the effect of cryopreservation on histology and apoptosis of these immature ovaries. Ovaries from poults at Day 1, Day 3, Day 5 and Day 7 post-hatch were cryopreserved using a modified vitrification method. The histology of oogonia and primordial follicles in fresh and cryopreserved tissue was assessed, and the apoptosis of tissue in different age groups was identified using a terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assay. The mean oogonium diameter in fresh tissue increased from 11.9±1.3 µm (Day 1) to 15.2±2.7 µm (Day 7) within the first week; however, oogonia in cryopreserved tissue from Day 3 and Day 7 ovaries were smaller than those in fresh tissue (P<0.05). Formation of primordial follicles was observed as early as Day 5. For Day 7 ovaries, follicles in cryopreserved tissue were smaller than those in fresh tissue; this was also true for oocyte diameter (P<0.05). Apoptosis was most frequent in Day 1 fresh tissue, which was reduced as the poults aged. The frequency of apoptosis in cryopreserved tissue was comparable among age groups. This study provides the first documentation of morphological changes in the turkey ovary within the first week post-hatching. Results suggest that oogonia and primordial follicles that are smaller in size could be more resistant to the damage caused by cryopreservation. Of the ages assessed in this study, it is concluded that 3 days of age appears optimal for recovery of donor ovaries for cryopreservation, taking the advance of reduced cryoinjury and ease of tissue handling at this age.
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72
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Momin AD, Singh N, Singh Y. Developmental study on ovary of human foetuses. J ANAT SOC INDIA 2016. [DOI: 10.1016/j.jasi.2017.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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73
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Comparison of apoptosis pathway following the use of two protocols for vitrification of immature mouse testicular tissue. Theriogenology 2016; 86:2073-82. [DOI: 10.1016/j.theriogenology.2016.06.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 06/19/2016] [Accepted: 06/19/2016] [Indexed: 12/28/2022]
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Liu T, Yang P, Chen H, Huang Y, Liu Y, Waqas Y, Ahmed N, Chu X, Chen Q. Global analysis of differential gene expression related to long-term sperm storage in oviduct of Chinese Soft-Shelled Turtle Pelodiscus sinensis. Sci Rep 2016; 6:33296. [PMID: 27628424 PMCID: PMC5024102 DOI: 10.1038/srep33296] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 08/24/2016] [Indexed: 12/19/2022] Open
Abstract
Important evolutionary and ecological consequences arise from the ability of female turtles to store viable spermatozoa for an extended period. Although previous morphological studies have observed the localization of spermatozoa in Pelodiscus sinensis oviduct, no systematic study on the identification of genes that are involved in long-term sperm storage has been performed. In this study, the oviduct of P. sinensis at different phases (reproductive and hibernation seasons) was prepared for RNA-Seq and gene expression profiling. In total, 2,662 differentially expressed genes (DEGs) including 1,224 up- and 1,438 down-regulated genes were identified from two cDNA libraries. Functional enrichment analysis indicated that many genes were predominantly involved in the immune response, apoptosis pathway and regulation of autophagy. RT-qPCR, ELISA, western blot and IHC analyses showed that the expression profiles of mRNA and protein in selected DEGs were in consistent with results from RNA-Seq analysis. Remarkably, TUNEL analysis revealed the reduced number of apoptotic cells during sperm storage. IHC and TEM analyses found that autophagy occurred in the oviduct epithelial cells, where the spermatozoa were closely attached. The outcomes of this study provide fundamental insights into the complex sperm storage regulatory process and facilitate elucidating the mechanism of sperm storage in P. sinensis.
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Affiliation(s)
- Tengfei Liu
- Laboratory of Animal Cell Biology and Embryology, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, China
| | - Ping Yang
- Laboratory of Animal Cell Biology and Embryology, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, China
| | - Hong Chen
- Laboratory of Animal Cell Biology and Embryology, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, China
| | - Yufei Huang
- Laboratory of Animal Cell Biology and Embryology, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, China
| | - Yi Liu
- Laboratory of Animal Cell Biology and Embryology, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, China
| | - Yasir Waqas
- Laboratory of Animal Cell Biology and Embryology, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, China
| | - Nisar Ahmed
- Laboratory of Animal Cell Biology and Embryology, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, China
| | - Xiaoya Chu
- Laboratory of Animal Cell Biology and Embryology, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, China
| | - Qiusheng Chen
- Laboratory of Animal Cell Biology and Embryology, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, China
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The Effects of Occupational Exposure of Carbon Disulfide on Sexual Hormones and Semen Quality of Male Workers From a Chemical Fiber Factory. J Occup Environ Med 2016; 58:e294-300. [DOI: 10.1097/jom.0000000000000823] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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76
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Chang Y, Dai DH, Li Y, Zhang Y, Zhang M, Zhou GB, Zeng CJ. Differences in the expression of microRNAs and their predicted gene targets between cauda epididymal and ejaculated boar sperm. Theriogenology 2016; 86:2162-2171. [PMID: 27527406 DOI: 10.1016/j.theriogenology.2016.07.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 07/12/2016] [Accepted: 07/12/2016] [Indexed: 01/27/2023]
Abstract
Mammalian spermatozoa gradually mature and acquire fertility during the transition from the testis to the caput and cauda epididymis, after which they are stored at the tail of the epididymis and the ampulla of vas deferens. During ejaculation, mixing of spermatozoa with the secretions of accessory sex glands leads to their dilution and changes in their function. Although remarkable progress has been made toward the understanding of changes in spermatozoa biochemistry and function before and after ejaculation, it is unknown whether microRNAs (miRNAs) are involved in regulating the function of spermatozoa during the transition between the cauda epididymis and ejaculation. In this study, 48 miRNAs were selected for analysis on the basis of their potential involvement in spermatogenesis, sperm maturation, and quality parameters markers. The differential expression levels of these 48 miRNAs between the caudal epididymis and fresh ejaculates of boar spermatozoa were determined. We found that 15 miRNAs were significantly differentially expressed (eight downregulated and seven upregulated) between boar cauda epididymal and fresh spermatozoa. Five miRNAs hypothesized to be involved in sperm apoptosis were further tested to demonstrate their influence over the expression of their target mRNAs using quantitative reverse-transcription polymerase chain reaction. Together, our findings suggest that these differentially expressed miRNAs are associated with the functional regulation of spermatozoa between cauda epididymis and ejaculation.
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Affiliation(s)
- Yu Chang
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan Province, P. R. China
| | - Ding-Hui Dai
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan Province, P. R. China
| | - Yuan Li
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan Province, P. R. China
| | - Yan Zhang
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan Province, P. R. China
| | - Ming Zhang
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan Province, P. R. China
| | - Guang-Bin Zhou
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan Province, P. R. China
| | - Chang-Jun Zeng
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan Province, P. R. China.
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Grive KJ, Gustafson EA, Seymour KA, Baddoo M, Schorl C, Golnoski K, Rajkovic A, Brodsky AS, Freiman RN. TAF4b Regulates Oocyte-Specific Genes Essential for Meiosis. PLoS Genet 2016; 12:e1006128. [PMID: 27341508 PMCID: PMC4920394 DOI: 10.1371/journal.pgen.1006128] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 05/25/2016] [Indexed: 11/28/2022] Open
Abstract
TAF4b is a gonadal-enriched subunit of the general transcription factor TFIID that is implicated in promoting healthy ovarian aging and female fertility in mice and humans. To further explore the potential mechanism of TAF4b in promoting ovarian follicle development, we analyzed global gene expression at multiple time points in the human fetal ovary. This computational analysis revealed coordinate expression of human TAF4B and critical regulators and effectors of meiosis I including SYCP3, YBX2, STAG3, and DAZL. To address the functional relevance of this analysis, we turned to the embryonic Taf4b-deficient mouse ovary where, for the first time, we demonstrate, severe deficits in prophase I progression as well as asynapsis in Taf4b-deficient oocytes. Accordingly, TAF4b occupies the proximal promoters of many essential meiosis and oogenesis regulators, including Stra8, Dazl, Figla, and Nobox, and is required for their proper expression. These data reveal a novel TAF4b function in regulating a meiotic gene expression program in early mouse oogenesis, and support the existence of a highly conserved TAF4b-dependent gene regulatory network promoting early oocyte development in both mice and women.
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Affiliation(s)
- Kathryn J. Grive
- MCB Graduate Program, Brown University, Providence, Rhode Island, United States of America
| | - Eric A. Gustafson
- MCB Department, Brown University, Providence, Rhode Island, United States of America
| | - Kimberly A. Seymour
- MCB Department, Brown University, Providence, Rhode Island, United States of America
| | - Melody Baddoo
- School of Medicine, Tulane University, New Orleans, Louisiana, United States of America
| | - Christoph Schorl
- MCB Department, Brown University, Providence, Rhode Island, United States of America
| | - Kayla Golnoski
- Magee Women’s Research Institute, Pittsburgh, Pennsylvania, United States of America
| | - Aleksandar Rajkovic
- Magee Women’s Research Institute, Pittsburgh, Pennsylvania, United States of America
| | - Alexander S. Brodsky
- Department of Pathology, Rhode Island Hospital and Brown University, Providence, Rhode Island, United States of America
| | - Richard N. Freiman
- MCB Department, Brown University, Providence, Rhode Island, United States of America
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Dalal J, Kumar A, Honparkhe M, Deka D, Singh N. Minimization of apoptosis-like changes in cryopreserved buffalo bull sperm by supplementing extender with Bcl-2 protein. Vet World 2016; 9:432-6. [PMID: 27284216 PMCID: PMC4893711 DOI: 10.14202/vetworld.2016.432-436] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 04/16/2016] [Indexed: 11/16/2022] Open
Abstract
Aim: This study was aimed at evaluating the anti-apoptotic effects of Bcl-2 protein in cryopreserved buffalo bull sperm. Materials and Methods: A total 10 ejaculates from two buffalo bulls (5 each) were collected using artificial vagina method, and semen was evaluated using a standard protocol. Semen was extended by Tris egg yolk extender supplemented with Bcl-2 protein at 5, 10, and 15 µM. Semen was cryopreserved at ultra-low temperature using traditional vapor freezing method. Pre-freeze and post-thaw semen samples were evaluated for percent motility, viability, hypo-osmotic swelling test (HOST) reactive sperms; status of mitochondrial membrane activity and status of sperm phospholipase A1 and phospholipase A2 activity. Results: There were no significant effects of Bcl-2 protein supplementation on pre-freeze sperm quality. Percent motility and active mitochondria in post-thaw Bcl-2 supplemented and control groups were also similar. However, viable sperms were significantly (p<0.05) higher (74.29±4.23%) in Bcl-2 supplemented group (5 µM) as compared to control (51.6±5.77%). The proportion of HOST reactive sperms was also higher (63.1±6.73%) in Bcl-2 supplemented (5 µM) group as compared to control (50.7±6.98%). The sperm with low PLA activity (non-apoptotic) was significantly (p<0.05) higher in all the supplemented doses of Bcl-2 protein, i.e., at 5 µM (73.42±5.79%), 10 µM (75.51±6.22%), and 15 µM (74.78±5.89%) as compared to control (60.23±4.45%). We found that Bcl-2 protein supplementation at 5 µM dose improved the post-thaw semen quality indicated by higher viability, HOST reactive sperms, and sperm with low PLA activity (non-apoptotic sperms). Conclusion: Bcl-2 protein supplementation exerts its protective effect on spermatozoa against apoptosis-like changes developed during cryopreservation.
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Affiliation(s)
- Jasmer Dalal
- Department of Veterinary Gynaecology and Obstetrics, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, India
| | - Ajeet Kumar
- Department of Veterinary Gynaecology and Obstetrics, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, India
| | - Mrigank Honparkhe
- Department of Veterinary Gynaecology and Obstetrics, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, India
| | - Dipak Deka
- School of Animal Biotechnology, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, India
| | - Narinder Singh
- Department of Veterinary Gynaecology and Obstetrics, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, India
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Shih HJ, Yen JC, Chiu AW, Chow YC, Pan WH, Huang CJ. FTY720 inhibits germ cell apoptosis in testicular torsion/detorsion. J Surg Res 2016; 202:155-64. [DOI: 10.1016/j.jss.2015.12.035] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 12/03/2015] [Accepted: 12/22/2015] [Indexed: 10/22/2022]
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Aliakbari F, Sedighi Gilani MA, Yazdekhasti H, Koruji M, Asgari HR, Baazm M, Izadyar F, Kharrazi Nejad E, Khanezad M, Abbasi M. Effects of antioxidants, catalase and α-tocopherol on cell viability and oxidative stress variables in frozen-thawed mice spermatogonial stem cells. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2016; 45:63-68. [PMID: 27123904 DOI: 10.3109/21691401.2016.1138491] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Cryopreservation of spermatogonial stem cells is considered as a useful procedure for preserving fertility in children with testis cancer. SSCs were isolated from testes mice, and then antioxidant was added to the freezing medium. The Bax expression level in antioxidant groups was significantly (P ≤ 0.05) lower than the control group and a significant rise of Bcl2 expression was detected in the antioxidant groups. ROS production with antioxidant was significantly lower compared with the control group. Cryopreservation with the addition of the antioxidants can help increase the number of SSCs and improve the quality and viability of these cells after cryopreservation.
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Affiliation(s)
- Freshte Aliakbari
- a Department of Anatomy, School of Medicine , Tehran University of Medical Sciences , Tehran , Iran
| | - Mohamad Ali Sedighi Gilani
- b Department of Urology, Shariati Hospital , Tehran University of Medical Sciences , Tehran , Iran.,c Department of Andrology, Reproductive Biomedicine Research Center , Royan Institute for Stem Cell Biology and Technology, ACECR , Tehran , Iran
| | - Hossein Yazdekhasti
- a Department of Anatomy, School of Medicine , Tehran University of Medical Sciences , Tehran , Iran
| | - Morteza Koruji
- f Cellular and Molecular Research Center & Department of Anatomical Sciences , Iran University of Medical Sciences , Tehran , Iran
| | - Hamid Reza Asgari
- g Department of Anatomical Sciences, Faculty of Medicine , Iran University of Medical Sciences , Tehran , Iran
| | - Maryam Baazm
- d Department of Anatomy, School of Medicine , Arak University of Medical Sciences , Arak , Iran
| | | | - Ebrahim Kharrazi Nejad
- a Department of Anatomy, School of Medicine , Tehran University of Medical Sciences , Tehran , Iran
| | - Maryam Khanezad
- a Department of Anatomy, School of Medicine , Tehran University of Medical Sciences , Tehran , Iran
| | - Mehdi Abbasi
- a Department of Anatomy, School of Medicine , Tehran University of Medical Sciences , Tehran , Iran
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Talarczyk-Desole J, Kotwicka M, Jendraszak M, Pawelczyk L, Murawski M, Jędrzejczak P. Sperm midpiece apoptotic markers: impact on fertilizing potential in in vitro fertilization and intracytoplasmic sperm injection. Hum Cell 2016; 29:67-75. [PMID: 26791536 PMCID: PMC4819544 DOI: 10.1007/s13577-015-0129-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Accepted: 12/01/2015] [Indexed: 11/24/2022]
Abstract
The aim of this study was to investigate the relationship between apoptotic markers present in human spermatozoa, namely phosphatidylserine translocation (PST) from the inner to the outer layer of the cytomembrane and the active form of caspase-3 (c3) versus the fertilizing potential of male gametes in conventional in vitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI) models. A total of 116 male patients treated with their partners for infertility underwent basic semen analysis and an assessment of the presence of PST and the active c3 in sperm using flow cytometry. Forty patients underwent IVF, group A, while 76 patients underwent ICSI, group B. The fertilizing potential of the gametes was measured as the percentage of oocytes with pronuclei present after either procedure. PST and active c3 were identified in vital gametes, mainly in the midpiece area. Concentration, motility, morphology, and viability of spermatozoa strongly negatively correlated with both markers. In group A, a negative correlation between both markers and the success rate of conventional IVF was observed (r = -0.4, p = 0.04 for PST; r = -0.4, p = 0.02 for active c3, respectively). In group B, the success rate of ICSI did not correlate with either marker (r = -0.2, p = 0.85 for PST and r = 0.1, p = 0.51 for active c3). The two apoptotic markers localized in the sperm midpiece area may affect their function not only by decreasing basic andrologic parameters but also by reducing the probability of conception. Therefore, analysis of PST and active c3 in the sperm of patients undergoing infertility treatment should be recommended.
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Affiliation(s)
- Joanna Talarczyk-Desole
- Division of Infertility and Reproductive Endocrinology, Poznan University of Medical Sciences, Polna 33, 60-535, Poznan, Poland.
| | - Małgorzata Kotwicka
- Department of Cell Biology, Poznan University of Medical Sciences, Rokietnicka 5d, 60-806, Poznan, Poland
| | - Magdalena Jendraszak
- Department of Cell Biology, Poznan University of Medical Sciences, Rokietnicka 5d, 60-806, Poznan, Poland
| | - Leszek Pawelczyk
- Division of Infertility and Reproductive Endocrinology, Poznan University of Medical Sciences, Polna 33, 60-535, Poznan, Poland
| | - Marek Murawski
- 1st Department and Clinic of Gynaecology and Obstetrics, Wrocław Medical University, T. Chałubińskiego 3, 50-368, Wrocław, Poland
| | - Piotr Jędrzejczak
- Division of Infertility and Reproductive Endocrinology, Poznan University of Medical Sciences, Polna 33, 60-535, Poznan, Poland
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82
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Gu Y, Xu W, Nie D, Zhang D, Dai J, Zhao X, Zhang M, Wang Z, Chen Z, Qiao Z. Nicotine induces Nme2-mediated apoptosis in mouse testes. Biochem Biophys Res Commun 2016; 472:573-9. [PMID: 26972251 DOI: 10.1016/j.bbrc.2016.03.044] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 03/09/2016] [Indexed: 11/18/2022]
Abstract
In mouse testes, germ cell apoptosis can be caused by cigarette smoke and lead to declining quality of semen, but the exact molecular mechanisms remain unclear. To evaluate the effects of nicotine exposure on apoptosis during spermatogenesis, we first constructed a nicotine-treated mouse model and detected germ cell apoptosis activity in the testes using the TUNEL method. Then we analyzed the variation of telomere length and telomerase activity by real-time PCR and TRAP-real-time PCR, respectively. Further, we investigated a highly expressed gene, Nme2, in mouse testes after nicotine treatment from our previous results, which has close correlation with the apoptosis activity predicted by bioinformatics. We performed NME2 overexpression in Hela cells to confirm whether telomere length and telomerase activity were regulated by the Nme2 gene. Finally, we examined methylation of CpG islands in the Nme2 promoter with the Bisulfite Sequencing (BSP) method. The results showed that apoptosis had increased significantly, and then telomerase activity became weak. Further, telomere length was shortened in the germ cells among the nicotine-treated group. In Hela cells, both overexpression of the Nme2 gene and nicotine exposure can suppress the activity of telomerase activity and shorten telomere length. BSP results revealed that the Nme2 promoter appeared with low methylation in mouse testes after nicotine treatment. We assume that nicotine-induced apoptosis may be caused by telomerase activity decline, which is inhibited by the up expression of Nme2 because of its hypomethylation in mouse germ cells.
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Affiliation(s)
- Yunqi Gu
- School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Wangjie Xu
- School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Dongsheng Nie
- School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Dong Zhang
- School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Jingbo Dai
- School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Xianglong Zhao
- School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Meixing Zhang
- School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Zhaoxia Wang
- School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Zhong Chen
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, 200233, PR China.
| | - Zhongdong Qiao
- School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, PR China.
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83
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Ottesen EW, Howell MD, Singh NN, Seo J, Whitley EM, Singh RN. Severe impairment of male reproductive organ development in a low SMN expressing mouse model of spinal muscular atrophy. Sci Rep 2016; 6:20193. [PMID: 26830971 PMCID: PMC4735745 DOI: 10.1038/srep20193] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Accepted: 12/23/2015] [Indexed: 12/21/2022] Open
Abstract
Spinal muscular atrophy (SMA) is caused by low levels of survival motor neuron (SMN), a multifunctional protein essential for higher eukaryotes. While SMN is one of the most scrutinized proteins associated with neurodegeneration, its gender-specific role in vertebrates remains unknown. We utilized a mild SMA model (C/C model) to examine the impact of low SMN on growth and development of mammalian sex organs. We show impaired testis development, degenerated seminiferous tubules, reduced sperm count and low fertility in C/C males, but no overt sex organ phenotype in C/C females. Underscoring an increased requirement for SMN expression, wild type testis showed extremely high levels of SMN protein compared to other tissues. Our results revealed severe perturbations in pathways critical to C/C male reproductive organ development and function, including steroid biosynthesis, apoptosis, and spermatogenesis. Consistent with enhanced apoptosis in seminiferous tubules of C/C testes, we recorded a drastic increase in cells with DNA fragmentation. SMN was expressed at high levels in adult C/C testis due to an adult-specific splicing switch, but could not compensate for low levels during early testicular development. Our findings uncover novel hallmarks of SMA disease progression and link SMN to general male infertility.
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Affiliation(s)
- Eric W Ottesen
- Department of Biomedical Sciences, Iowa State University, Ames, Iowa 50011, USA
| | - Matthew D Howell
- Department of Biomedical Sciences, Iowa State University, Ames, Iowa 50011, USA
| | - Natalia N Singh
- Department of Biomedical Sciences, Iowa State University, Ames, Iowa 50011, USA
| | - Joonbae Seo
- Department of Biomedical Sciences, Iowa State University, Ames, Iowa 50011, USA
| | - Elizabeth M Whitley
- Department of Veterinary Pathology, Iowa State University, Ames, Iowa 50011, USA
| | - Ravindra N Singh
- Department of Biomedical Sciences, Iowa State University, Ames, Iowa 50011, USA
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84
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Nie D, Zhang D, Dai J, Zhang M, Zhao X, Xu W, Chen Z, Wang L, Wang Z, Qiao Z. Nicotine Induced Murine Spermatozoa Apoptosis via Up-Regulation of Deubiquitinated RIP1 by Trim27 Promoter Hypomethylation1. Biol Reprod 2016; 94:31. [DOI: 10.1095/biolreprod.115.131656] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 11/19/2015] [Indexed: 12/21/2022] Open
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86
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Goldman A, Rodríguez-Casuriaga R, González-López E, Capoano CA, Santiñaque FF, Geisinger A. MTCH2 is differentially expressed in rat testis and mainly related to apoptosis of spermatocytes. Cell Tissue Res 2015; 361:869-83. [DOI: 10.1007/s00441-015-2163-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Accepted: 02/26/2015] [Indexed: 11/30/2022]
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87
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Erickson L, Kroetsch T, Anzar M. Relationship between sperm apoptosis and bull fertility: in vivo and in vitro studies. Reprod Fertil Dev 2015; 28:RD14417. [PMID: 25764086 DOI: 10.1071/rd14417] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 01/16/2015] [Indexed: 12/28/2022] Open
Abstract
The objectives of this study were to confirm the relationship of apoptosis-associated membrane and nuclear changes in bull spermatozoa with field fertility, to predict the fertility of beef bulls used for natural breeding and to study the role of DNA-nicked spermatozoa in early embryonic development. In Experiment 1, the relationship between fertility and different sperm populations identified by the Annexin V/propidium iodide (PI) and terminal deoxynucleotidyl transferase mediated dUTP nick end labeling (TUNEL) assays was determined. Bull fertility was related to live (PPPin vitro cleavage and blastocyst rates was evaluated, using 30000 or 300000 spermatozoa per droplet. Cleavage rate was adversely affected (PP<0.05) in high DNA-nicked spermatozoa at the lower sperm concentration. In conclusion, the incidence of DNA-nicked spermatozoa is a useful marker to predict a bull's fertility potential. DNA-nicked spermatozoa showed adverse effects on early embryonic development.
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88
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Mishra PK, Bunkar N, Raghuram GV, Khare NK, Pathak N, Bhargava A. Epigenetic dimension of oxygen radical injury in spermatogonial epithelial cells. Reprod Toxicol 2015; 52:40-56. [PMID: 25687723 DOI: 10.1016/j.reprotox.2015.02.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 02/04/2015] [Accepted: 02/06/2015] [Indexed: 12/17/2022]
Abstract
The present work reports a direct role of mitochondrial oxidative stress induced aberrant chromatin regulation, as a central phenomenon, to perturbed genomic integrity in the testicular milieu. Oxygen-radical injury following N-succinimidyl N-methylcarbamate treatment in mouse spermatogonial epithelial (GC-1 spg) cells induced functional derailment of mitochondrial machinery. Mitophagy resulted in marked inhibition of mitochondrial respiration and reduced mtDNA copy number. Impaired cell cycle progression along with altered H3K9me1, H4K20me3, H3, AcH3 and uH2A histone modifications were observed in the treated cells. Dense heterochromatin foci and aberrant expression of HP1α in nuclei of treated cells implied onset of senescence associated secretory phenotype mediated through nuclear accumulation of NF-κB. Neoplastic nature of daughter clones, emerged from senescent mother phenotypes was confirmed by cytogenetic instability, aberrant let-7a and let-7b miRNA expression and anchorage independent growth. Together, our results provide the first insights of redox-dependent epigenomic imbalance in spermatogonia, a previously unknown molecular paradigm.
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Affiliation(s)
- Pradyumna K Mishra
- Translational Research Lab, School of Biological Sciences, Dr. H.S. Gour Central University, Sagar, India; Division of Translational Research, Tata Memorial Centre, ACTREC, Navi Mumbai, India.
| | - Neha Bunkar
- Translational Research Lab, School of Biological Sciences, Dr. H.S. Gour Central University, Sagar, India
| | - Gorantla V Raghuram
- Translational Research Lab, School of Biological Sciences, Dr. H.S. Gour Central University, Sagar, India; Division of Translational Research, Tata Memorial Centre, ACTREC, Navi Mumbai, India
| | - Naveen K Khare
- Division of Translational Research, Tata Memorial Centre, ACTREC, Navi Mumbai, India
| | - Neelam Pathak
- Translational Research Lab, School of Biological Sciences, Dr. H.S. Gour Central University, Sagar, India
| | - Arpit Bhargava
- Translational Research Lab, School of Biological Sciences, Dr. H.S. Gour Central University, Sagar, India; Division of Translational Research, Tata Memorial Centre, ACTREC, Navi Mumbai, India
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89
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Abstract
In the mammalian testis, spermatogenesis is a highly coordinated process of germ cell development, which ends with the release of ‘mature’ spermatozoa. The fine regulation of spermatogenesis is strictly dependent on sex steroid hormones, which orchestrate the cellular and molecular events underlying normal development of germ cells. Sex steroids actions also rely on the control of germ cell survival, and the programmed cell death by apoptosis has been indicated as a critical process in regulating the size and quality of the germ line. Recently, oestrogens have emerged as important regulators of germ cell fate. However, the beneficial or detrimental effects of oestrogens in spermatogenesis are controversial, with independent reports arguing for their role as cell survival factors or as apoptosis-inducers. The dual behaviour of oestrogens, shifting from ‘angels to devils’ is supported by the clinical findings of increased oestrogens levels in serum and intratesticular milieu of idiopathic infertile men. This review aims to discuss the available information concerning the role of oestrogens in the control of germ cell death and summarises the signalling mechanisms driven oestrogen-induced apoptosis. The present data represent a valuable basis for the clinical management of hyperoestrogenism-related infertility and provide a rationale for the use of oestrogen-target therapies in male infertility.
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90
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Savage P. Clinical observations on chemotherapy curable malignancies: unique genetic events, frozen development and enduring apoptotic potential. BMC Cancer 2015; 15:11. [PMID: 25605631 PMCID: PMC4308945 DOI: 10.1186/s12885-015-1006-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Accepted: 12/31/2014] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND A select number of relatively rare metastatic malignancies comprising trophoblast tumours, the rare childhood cancers, germ cells tumours, leukemias and lymphomas have been routinely curable with chemotherapy for more than 30 years. However for the more common metastatic malignancies chemotherapy treatment frequently brings clinical benefits but cure is not expected. Clinically this clear divide in outcome between the tumour types can appear at odds with the classical theories of chemotherapy sensitivity and resistance that include rates of proliferation, genetic development of drug resistance and drug efflux pumps. We have looked at the clinical characteristics of the chemotherapy curable malignancies to see if they have any common factors that could explain this extreme differential sensitivity to chemotherapy. DISCUSSION It has previously been noted how the onset of malignancy can leave malignant cells fixed with some key cellular functions remaining frozen at the point in development at which malignant transformation occurred. In the chemotherapy curable malignancies the onset of malignancy is in each case closely linked to one of the unique genetic events of; nuclear fusion for molar pregnancies, choriocarcinoma and placental site trophoblast tumours, gastrulation for the childhood cancers, meiosis for testicular cancer and ovarian germ cell tumours and VDJ rearrangement and somatic hypermutation for acute leukemia and lymphoma. These processes are all linked to natural periods of supra-physiological apoptotic potential and it appears that the malignant cells arising from them usually retain this heightened sensitivity to DNA damage. To investigate this hypothesis we have examined the natural history of the healthy cells during these processes and the chemotherapy sensitivity of malignancies arising before, during and after the events. To add to the debate on chemotherapy resistance and sensitivity, we would argue that malignancies can be functionally divided into 2 groups. Firstly those that arise in cells with naturally heightened apoptotic potential as a result of their proximity to the unique genetic events, where the malignancies are generally chemotherapy curable and then the more common malignancies that arise in cells of standard apoptotic potential that are not curable with classical cytotoxic drugs.
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Affiliation(s)
- Philip Savage
- BCCA Vancouver Island, 2410 Lee Avenue, Victoria, BC, V8R 6V5, Canada.
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91
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Palermo GD, Neri QV, Cozzubbo T, Rosenwaks Z. Perspectives on the assessment of human sperm chromatin integrity. Fertil Steril 2014; 102:1508-17. [DOI: 10.1016/j.fertnstert.2014.10.008] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 10/02/2014] [Accepted: 10/06/2014] [Indexed: 12/13/2022]
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92
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Chen H, Lam Fok K, Jiang X, Chan HC. New insights into germ cell migration and survival/apoptosis in spermatogenesis: Lessons from CD147. SPERMATOGENESIS 2014; 2:264-272. [PMID: 23248767 PMCID: PMC3521748 DOI: 10.4161/spmg.22014] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
CD147, also named basigin (Bsg) or extracellular matrix (ECM) metalloproteinase inducer (EMMPRIN), is a highly glycosylated protein first identified as a tumor cell surface molecule. In cancer, it is well established that CD147 promotes metastasis by stimulating the production of MMPs. Recent studies have also suggested that it may be associated with tumor growth and angiogenesis. Interestingly, CD147 is expressed in germ cells of different development stages in the testis and its knockout mice are infertile, indicating an essential role of CD147 in spermatogenesis. While the detailed involvement of CD147 in spermatogenesis remains elusive, our recent findings have revealed a dual role of CD147 in germ cell development. On the one hand, it regulates the migration of spermatogonia and spermatocytes via the induction of MMP-2 production; on the other hand, it specifically regulates the survival/apoptosis of spermatocytes but not spermatogonia through a p53-independent pathway. In this review, we aim to provide an overview on the functions of CD147, comparing its roles in cancer and the testis, thereby providing new insights into the regulatory mechanisms underlying the process of spermatogenesis.
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Affiliation(s)
- Hao Chen
- The Second People's Hospital of Shenzhen; The First Affiliated Hospital of Shenzhen University; Shenzhen, P.R. China ; Epithelial Cell Biology Research Center; School of Biomedical Sciences; Faculty of Medicine; The Chinese University of Hong Kong; Shatin, Hong Kong
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93
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Garcia-Quevedo L, Blanco J, Sarrate Z, Vidal F. Apoptosis mediated by phosphatidylserine externalization in the elimination of aneuploid germ cells during human spermatogenesis. Andrology 2014; 2:892-8. [DOI: 10.1111/j.2047-2927.2014.00272.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Revised: 08/01/2014] [Accepted: 08/07/2014] [Indexed: 11/28/2022]
Affiliation(s)
- L. Garcia-Quevedo
- Unitat de Biologia Cel·lular; Facultat de Biociències; Universitat Autònoma de Barcelona; Bellaterra (Cerdanyola del Vallès) Spain
| | - J. Blanco
- Unitat de Biologia Cel·lular; Facultat de Biociències; Universitat Autònoma de Barcelona; Bellaterra (Cerdanyola del Vallès) Spain
| | - Z. Sarrate
- Unitat de Biologia Cel·lular; Facultat de Biociències; Universitat Autònoma de Barcelona; Bellaterra (Cerdanyola del Vallès) Spain
| | - F. Vidal
- Unitat de Biologia Cel·lular; Facultat de Biociències; Universitat Autònoma de Barcelona; Bellaterra (Cerdanyola del Vallès) Spain
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94
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Aitken RJ, Smith TB, Jobling MS, Baker MA, De Iuliis GN. Oxidative stress and male reproductive health. Asian J Androl 2014; 16:31-8. [PMID: 24369131 PMCID: PMC3901879 DOI: 10.4103/1008-682x.122203] [Citation(s) in RCA: 365] [Impact Index Per Article: 36.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
One of the major causes of defective sperm function is oxidative stress, which not only disrupts the integrity of sperm DNA but also limits the fertilizing potential of these cells as a result of collateral damage to proteins and lipids in the sperm plasma membrane. The origins of such oxidative stress appear to involve the sperm mitochondria, which have a tendency to generate high levels of superoxide anion as a prelude to entering the intrinsic apoptotic cascade. Unfortunately, these cells have very little capacity to respond to such an attack because they only possess the first enzyme in the base excision repair (BER) pathway, 8-oxoguanine glycosylase 1 (OGG1). The latter successfully creates an abasic site, but the spermatozoa cannot process the oxidative lesion further because they lack the downstream proteins (APE1, XRCC1) needed to complete the repair process. It is the responsibility of the oocyte to continue the BER pathway prior to initiation of S-phase of the first mitotic division. If a mistake is made by the oocyte at this stage of development, a mutation will be created that will be represented in every cell in the body. Such mechanisms may explain the increase in childhood cancers and other diseases observed in the offspring of males who have suffered oxidative stress in their germ line as a consequence of age, environmental or lifestyle factors. The high prevalence of oxidative DNA damage in the spermatozoa of male infertility patients may have implications for the health of children conceived in vitro and serves as a driver for current research into the origins of free radical generation in the germ line.
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Affiliation(s)
- Robert J Aitken
- Priority Research Centre in Reproductive Science, Discipline of Biological Sciences, Faculty of Science and IT, University of Newcastle, Callaghan, NSW 2308, Australia
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95
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Curti G, Skowronek F, Vernochi R, Rodriguez-Buzzi AL, Rodriguez-Buzzi JC, Casanova G, Sapiro R. Morphological evaluation of sperm from infertile men selected by magnetic activated cell sorting (MACS). Reprod Biol 2014; 14:289-92. [PMID: 25454495 DOI: 10.1016/j.repbio.2014.07.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Revised: 07/04/2014] [Accepted: 07/29/2014] [Indexed: 10/24/2022]
Abstract
Electron microscopy analysis performed in five infertile human subjects after sperm selection by swim-up followed by magnetic activated cell sorting (MACS) demonstrated a decrease in the number of spermatozoa with characteristics compatible with cell death. However, no significant differences were found when the swim-up/MACS semen fraction was compared with swim-up fraction alone.
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Affiliation(s)
- Gianni Curti
- Departamento de Biologia Molecular - Instituto De Investigaciones Biológicas Clemente Estable (IIBCE), Avenida Italia 3318, CP 11600 Montevideo, Uruguay.
| | - Fernanda Skowronek
- Laboratorio de Biología Molecular de la Reproducción - Departamento de Histología y Embriología, Facultad de Medicina, Gral. Flores 2125, 11800 Montevideo, Uruguay.
| | - Rita Vernochi
- Centro de Reproducción Humana del Interior (CERHIN), Bvar. Artigas 1665/102, Montevideo, Uruguay.
| | | | | | - Gabriela Casanova
- Unidad de Microscopía Electrónica de Transmisión - Facultad de Ciencias, Iguá 4225, 11400 Montevideo, Uruguay.
| | - Rossana Sapiro
- Laboratorio de Biología Molecular de la Reproducción - Departamento de Histología y Embriología, Facultad de Medicina, Gral. Flores 2125, 11800 Montevideo, Uruguay.
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96
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Gallardo Bolaños JM, Balao da Silva CM, Martín Muñoz P, Morillo Rodríguez A, Plaza Dávila M, Rodríguez-Martínez H, Aparicio IM, Tapia JA, Ortega Ferrusola C, Peña FJ. Phosphorylated AKT preserves stallion sperm viability and motility by inhibiting caspases 3 and 7. Reproduction 2014; 148:221-35. [DOI: 10.1530/rep-13-0191] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
AKT, also referred to as protein kinase B (PKB or RAC), plays a critical role in controlling cell survival and apoptosis. To gain insights into the mechanisms regulating sperm survival after ejaculation, the role of AKT was investigated in stallion spermatozoa using a specific inhibitor and a phosphoflow approach. Stallion spermatozoa were washed and incubated in Biggers–Whitten–Whittingham medium, supplemented with 1% polyvinyl alcohol (PVA) in the presence of 0 (vehicle), 10, 20 or 30 μM SH5, an AKT inhibitor. SH5 treatment reduced the percentage of sperm displaying AKT phosphorylation, with inhibition reaching a maximum after 1 h of incubation. This decrease in phosphorylation was attributable to either dephosphorylation or suppression of the active phosphorylation pathway. Stallion spermatozoa spontaneously dephosphorylated during in vitro incubation, resulting in a lack of a difference in AKT phosphorylation between the SH5-treated sperm and the control after 4 h of incubation. AKT inhibition decreased the proportion of motile spermatozoa (total and progressive) and the sperm velocity. Similarly, AKT inhibition reduced membrane integrity, leading to increased membrane permeability and reduced the mitochondrial membrane potential concomitantly with activation of caspases 3 and 7. However, the percentage of spermatozoa exhibiting oxidative stress, the production of mitochondrial superoxide radicals, DNA oxidation and DNA fragmentation were not affected by AKT inhibition. It is concluded that AKT maintains the membrane integrity of ejaculated stallion spermatozoa, presumably by inhibiting caspases 3 and 7, which prevents the progression of spermatozoa to an incomplete form of apoptosis.Free Spanish abstractA Spanish translation of this abstract is freely available at http://www.reproduction-online.org/content/148/2/221/suppl/DC1.
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97
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Giffin JL, Bartlewski PM, Hahnel AC. Correlations among ultrasonographic and microscopic characteristics of prepubescent ram lamb testes. Exp Biol Med (Maywood) 2014; 239:1606-18. [DOI: 10.1177/1535370214543063] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The onset of spermatogenesis during prepubertal development is accompanied by dynamic changes in testicular microstructure. Computer-assisted analysis of scrotal ultrasonograms may allow us to track these changes in a noninvasive manner; however, the echotextural characteristics of different histomorphological variables remain unclear. Hence the objective of this study was to compare echotextural and microscopic attributes of the testis over the first wave of spermatogenesis in prepubescent ram lambs. Bi-weekly ultrasound examinations and weekly testicular biopsies were carried out in 22 ram lambs from 9.5–10 weeks of age or the attainment of 15 cm3 in testicular volume, respectively, to the first detection of elongated spermatids (ESt). Testicular echogenicity was highly variable with age; however, after the alignment of data to the first detection of ESt, there was an initial increase followed by a decline, corresponding to the mitotic and postmitotic phases of spermatogenesis in prepubescent ram lambs. Testicular echotextural attributes (mean numerical pixel values and pixel heterogeneity) correlated with seminiferous tubule (ST) diameter, the number of degenerating cells/ST cross-section (XS), and the number of ubiquitin C-terminal hydrolase L-1 (a marker for prespermatogonia and undifferentiated spermatogonia) staining cells/ST XS during the mitotic and postmitotic phases. Additionally, in the postmitotic phase, significant correlations were recorded between the quantitative echotextural characteristics and ST cell density, nuclear:ST area and percentages of STs with different spermatogenic cells as the most mature germ cell type present. These results indicate that ram testes exhibit distinctive echotextural characteristics during the mitotic and postmitotic phases of germ cell differentiation. It is concluded that scrotal ultrasonography in conjunction with computerized image analysis holds potential as a noninvasive alternative to testicular biopsy in monitoring the reproductive status throughout different stages of testicular development.
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Affiliation(s)
- Jennifer L Giffin
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada N1G 2W1
| | - Pawel M Bartlewski
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada N1G 2W1
| | - Ann C Hahnel
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada N1G 2W1
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98
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Gallardo Bolaños JM, Balao da Silva C, Martín Muñoz P, Plaza Dávila M, Ezquerra J, Aparicio IM, Tapia JA, Ortega Ferrusola C, Peña FJ. Caspase activation, hydrogen peroxide production and Akt dephosphorylation occur during stallion sperm senescence. Reprod Domest Anim 2014; 49:657-664. [PMID: 24924976 DOI: 10.1111/rda.12343] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2014] [Accepted: 05/03/2014] [Indexed: 12/23/2022]
Abstract
To investigate the mechanisms inducing sperm death after ejaculation, stallion ejaculates were incubated in BWW media during 6 h at 37°C. At the beginning of the incubation period and after 1, 2, 4 and 6 h sperm motility and kinematics (CASA), mitochondrial membrane potential and membrane permeability and integrity were evaluated (flow cytometry). Also, at the same time intervals, active caspase 3, hydrogen peroxide, superoxide anion (flow cytometry) and Akt phosphorylation (flow cytometry) were evaluated. Major decreases in sperm function occurred after 6 h of incubation, although after 1 h decrease in the percentages of motile and progressive motile sperm occurred. The decrease observed in sperm functionality after 6 h of incubation was accompanied by a significant increase in the production of hydrogen peroxide and the greatest increase in caspase 3 activity. Additionally, the percentage of phosphorylated Akt reached a minimum after 6 h of incubation. These results provide evidences that sperm death during in vitro incubation is largely an apoptotic phenomena, probably stimulated by endogenous production of hydrogen peroxide and the lack of prosurvival factors maintaining Akt in a phosphorylated status. Disclosing molecular mechanisms leading to sperm death may help to develop new strategies for stallion sperm conservation.
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Affiliation(s)
- J M Gallardo Bolaños
- Laboratory of Equine Reproduction and Equine Spermatology, Faculty of Veterinary Medicine, University of Extremadura, Cáceres, Spain
| | - C Balao da Silva
- Laboratory of Equine Reproduction and Equine Spermatology, Faculty of Veterinary Medicine, University of Extremadura, Cáceres, Spain
| | - P Martín Muñoz
- Laboratory of Equine Reproduction and Equine Spermatology, Faculty of Veterinary Medicine, University of Extremadura, Cáceres, Spain
| | - M Plaza Dávila
- Laboratory of Equine Reproduction and Equine Spermatology, Faculty of Veterinary Medicine, University of Extremadura, Cáceres, Spain
| | - J Ezquerra
- Faculty of Veterinary Medicine, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain
| | - I M Aparicio
- Department of Physiology, Faculty of Veterinary Medicine, University of Extremadura, Cáceres, Spain
| | - J A Tapia
- Department of Physiology, Faculty of Veterinary Medicine, University of Extremadura, Cáceres, Spain
| | - C Ortega Ferrusola
- Laboratory of Equine Reproduction and Equine Spermatology, Faculty of Veterinary Medicine, University of Extremadura, Cáceres, Spain
| | - F J Peña
- Laboratory of Equine Reproduction and Equine Spermatology, Faculty of Veterinary Medicine, University of Extremadura, Cáceres, Spain
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99
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Zhao XM, Ren JJ, Zhao SJ, Cui LS, Hao HS, Wang HY, Du WH, Qin T, Liu Y, Wang D, Zhu HB. Apoptosis-like events and in vitro fertilization capacity of sex-sorted bovine sperm. Reprod Domest Anim 2014; 49:543-549. [PMID: 24894655 DOI: 10.1111/rda.12305] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Accepted: 02/14/2014] [Indexed: 12/24/2022]
Abstract
This study utilized three staining assays (Annexin V, mitochondrial membrane potential (JC-1) and TUNEL) for flow cytometric analysis of apoptosis in sex-sorted sperm from four different bulls (A, B, C and D). Correlations between sperm quality and IVF efficiency were then assessed to determine which assay provided the best prediction of IVF efficiency. The results of the Annexin V assays, as well as measures of viable sperm, early apoptosis, necrotic sperm and mitochondrial membrane potential (∆ψm) showed that the sex-sorted sperm collected from bull A significantly differed from those of the other three bulls (p < 0.05). In addition, the levels of DNA fragmentation in sex-sorted sperm from bull A were significantly lower than those from bulls B and C (p < 0.05). The percentage of cells reaching the cleavage and blastocyst stages in sex-sorted sperm from bull A were significantly greater than those from the other bulls (p < 0.05). A significant positive correlation was observed between viable sperm and the percentage of cells at the cleavage or blastocyst stages (p < 0.05). In contrast, a negative correlation was found between early apoptotic sperm and the percentage of cells at the cleavage or blastocyst stages (p < 0.05). In conclusion, these results indicated that the Annexin V assay was the most reliable technique for the prediction of the IVF success of sex-sorted bovine sperm.
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Affiliation(s)
- X-M Zhao
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Science (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - J-J Ren
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Science (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - S-J Zhao
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Science (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - L-S Cui
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Science (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - H-S Hao
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Science (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - H-Y Wang
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Science (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - W-H Du
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Science (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - T Qin
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Science (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - Y Liu
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Science (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - D Wang
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Science (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - H-B Zhu
- Embryo Biotechnology and Reproduction Laboratory, Institute of Animal Science (IAS), Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
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100
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Effects of glycerol on apoptotic signaling pathways during boar spermatozoa cryopreservation. Cryobiology 2014; 68:395-404. [DOI: 10.1016/j.cryobiol.2014.03.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2014] [Revised: 02/24/2014] [Accepted: 03/17/2014] [Indexed: 11/18/2022]
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