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Wahyuni S, Siregar TN, Gholib G, Saputra A, Hafizuddin H, Sofyan H, Jalaluddin M, Adam M, Akmal M. Identification and Determination of the Seminiferous Epithelium Stages and Spermatid Development in the Testis of Aceh Bull ( Bos indicus). Vet Med Int 2023; 2023:8848185. [PMID: 37795107 PMCID: PMC10547576 DOI: 10.1155/2023/8848185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 09/05/2023] [Accepted: 09/11/2023] [Indexed: 10/06/2023] Open
Abstract
This study was conducted to describe the stages of seminiferous epithelium (SE), determine the relative frequency of the stages, and identify the steps of spermatid development during spermatogenesis in the testicular tissue of Aceh bull. Seven pairs of the testicular organs of Aceh bull (Bos indicus) were used and then processed in a histological manner for staining using haematoxylin and eosin (H&E) and periodic acid-Schiff-haematoxylin (PAS-H). The stages of seminiferous tubules were examined using a tubular morphology method while spermatid development was observed based on the acrosome formation during spermatid development. Eight stages (stages I to VIII) of SE were found in the testicular seminiferous tubules of Aceh bull. Furthermore, the percentage of the relative frequency of each stage was 25.48, 15.38, 12.92, 4.74, 14.97, 10.69, 10.74, and 5.08%, respectively, with the relative frequency of premeiotic, meiotic, and postmeiotic phases being 53.78, 4.74, and 41.48%, respectively. Spermatid development from round to elongated spermatids occurred in 14 steps. Steps 1 to 7 were observed in stage I, steps 8 and 9 in stage II, steps 10 and 11 in stage III, step 12 in stage IV, step 13 in stages V and VI, and step 14 in stages VII and VIII. These findings can be used as a basis for further studies, particularly in evaluating the abnormality of the cellular composition of the seminiferous tubule in each stage of spermatogenesis and also in determining daily sperm production in Aceh bull.
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Affiliation(s)
- Sri Wahyuni
- Laboratory of Anatomy, Faculty of Veterinary Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia
| | - Tongku Nizwan Siregar
- Laboratory of Reproduction, Faculty of Veterinary Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia
| | - Gholib Gholib
- Laboratory of Physiology, Faculty of Veterinary Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia
| | - Arianto Saputra
- Study Program of Veterinary Medicine Education, Faculty of Veterinary Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia
| | - Hafizuddin Hafizuddin
- Laboratory of Reproduction, Faculty of Veterinary Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia
| | - Hamny Sofyan
- Laboratory of Anatomy, Faculty of Veterinary Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia
| | - Muhammad Jalaluddin
- Laboratory of Anatomy, Faculty of Veterinary Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia
| | - Mulyadi Adam
- Laboratory of Physiology, Faculty of Veterinary Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia
| | - Muslim Akmal
- Laboratory of Histology, Faculty of Veterinary Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia
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Mfoundou JDL, Guo Y, Yan Z, Wang X. Morpho-Histology and Morphometry of Chicken Testes and Seminiferous Tubules among Yellow-Feathered Broilers of Different Ages. Vet Sci 2022; 9:vetsci9090485. [PMID: 36136701 PMCID: PMC9504805 DOI: 10.3390/vetsci9090485] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 08/31/2022] [Accepted: 09/03/2022] [Indexed: 12/03/2022] Open
Abstract
Simple Summary Testes are important male reproductive organs that in chickens have been greatly investigated, from pre-hatch to after sexual maturity. The present study investigated the changes in components that occur during growth, and evaluated morphometry of the seminiferous tubules (ST), as well as gonadosomatic index (GSI) in Gallus domesticus at different age stages. The left and right testes were harvested from 70 chickens, then fixed in alcoholic acetate formalin (AAF) fixative solution, and hematoxylin- and eosin-stained tissues were used for microscopic observations. The results revealed that the left testis (LT) and the right testis (RT) exhibited fuzzy ST features, with apoptotic resorption of many tubules observed in both testes of 1-wk-old chicks only. ST formation was completed at 1 month, with an increase of all morphometric parameters in both testes until sexual maturity (3-mo-old): the age at which we recorded the greatest GSI. This study provides details on ST apoptotic resorption, which is a process not yet reported in existing publications, as well as ST morphometry and GSI, from a juvenile stage of growth towards sexual maturity. This can serve as reference material and also as a data update to better understand the morpho-histological changes that occur in chicken testes during growth. Abstract Unlike in many mammals, poultry testes are found in the abdominal cavity where they develop and perform spermatogenesis at high body temperature. Scarce reports among current publications detail the growth of testes and ST morphometry among juvenile chicks. Therefore, this study aims to investigate changes in components occurring in Gallus domesticus testes, by assessing the GSI and morphologically and histologically evaluating the testes and ST morphometry from 1-wk- to 4-mo-old. Right and left testes were collected from 70 healthy chickens divided into seven age-related groups (n = 10) and then immersed into the alcoholic acetate formalin (AAF) fixative solution. Hematoxylin- and eosin-stained tissues were used for microscopic observations. The findings revealed that both testes exhibited smooth features from 1-wk-old to 1-mo-old, and thereafter showed a consistent increase in vascularization until 4-mo-old. Histologically, both testes exhibited unclear ST, with ST apoptotic resorption observed in the 1-wk-old chicks. Until 1-mo-old, ST formed and few spermatogonia differentiated into primary spermatocytes, with all spermatogenic cells observed at 3-mo-old, i.e., sexual maturity. These findings suggest that both testes develop in analogy, and their sizes including increases in length and diameter are related to the spermatogenic activity in the ST. Subsequently, ST resorption by apoptosis is assumed to participate in the physiological mechanism regulating germ cells (GC). Finally, the GSI tended to increase with growth.
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Affiliation(s)
| | - Yajun Guo
- College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Zunqiang Yan
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
| | - Xinrong Wang
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
- Correspondence: ; Tel.: +86-182-9310-5688
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Xiong L, Bin Zhou, Young JL, Wintergerst K, Cai L. Exposure to low-dose cadmium induces testicular ferroptosis. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 234:113373. [PMID: 35272187 PMCID: PMC10858319 DOI: 10.1016/j.ecoenv.2022.113373] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 02/26/2022] [Accepted: 03/01/2022] [Indexed: 06/14/2023]
Abstract
As an environmental pollutant, cadmium (Cd) has been widely reported to induce male infertility due to its gonadotoxicity. However, the specific mechanism of Cd-induced testicular damage remains unclear. We investigated whether Cd causes testicular injury through ferroptosis. Male C57BL/6 J mice were exposed to 0, 0.5, or 5 ppm Cd via drinking water, starting in utero, and continuing through 24 weeks post-weaning. The results showed that Cd accumulated in the testes in a dose-dependent manner. Cd exposure at a concentration of 5 ppm, but not 0.5 ppm, caused a mass loss and detachment of germ cells, as well as a decreased meiotic index and testis weight. Exposure to 5 ppm Cd caused iron accumulation, increased levels of malondialdehyde (MDA) and nitro tyrosine (3-NT), and decreased expression of Nrf2, HO-1 and SOD2. We also found that exposure to 5 ppm Cd significantly decreased the expression of SLC7A11, a marker of ferroptosis in mice, along with the expression of SLC40A1 mRNA and ferritin heavy chain (FTH) protein, whereas there was no obvious change in the mRNA expression of Tfrc, ZIP8, ZIP14, and NCOA4. These findings indicate that 5 ppm Cd exposure increased testicular ferroptosis, which may be attributed to the reduction of stored iron export.
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Affiliation(s)
- Lijuan Xiong
- Pediatric Research Institute, Department of Pediatrics, University of Louisville School of Medicine, Louisville, KY 40202, USA; Department of Emergency, The Affiliated Children's Hospital of Nanchang University, Nanchang, Jiangxi, China.
| | - Bin Zhou
- Department of Endocrinology, Metabolism, and Genetics, The Affiliated Children's Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Jamie L Young
- Pediatric Research Institute, Department of Pediatrics, University of Louisville School of Medicine, Louisville, KY 40202, USA; Department of Pharmacology and Toxicology, University of Louisville, Louisville, KY 40202, USA; Department of Medicine, University of Louisville School of Medicine, Louisville, KY 40202, USA
| | - Kupper Wintergerst
- Wendy Novak Diabetes Center, Norton Children's Hospital, Louisville, KY 40202, USA; Division of Endocrinology, Department of Pediatrics, University of Louisville School of Medicine, Louisville, KY 40202, USA
| | - Lu Cai
- Pediatric Research Institute, Department of Pediatrics, University of Louisville School of Medicine, Louisville, KY 40202, USA; Department of Pharmacology and Toxicology, University of Louisville, Louisville, KY 40202, USA; Wendy Novak Diabetes Center, Norton Children's Hospital, Louisville, KY 40202, USA; Radiation Oncology, University of Louisville School of Medicine, Louisville, KY 40202, USA.
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Oyewopo AO, Adeleke O, Johnson O, Akingbade A, Olaniyi KS, Areola ED, Tokunbo O. Regulatory effects of quercetin on testicular histopathology induced by cyanide in Wistar rats. Heliyon 2021; 7:e07662. [PMID: 34401560 PMCID: PMC8353301 DOI: 10.1016/j.heliyon.2021.e07662] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 05/24/2021] [Accepted: 07/23/2021] [Indexed: 01/17/2023] Open
Abstract
Several causes of infertility have been identified, and several papers have documented some compounds that cause infertility. One of the compounds reported to be toxic to the reproductive system is cyanide. In the management of infertility, various mechanisms ranging from synthetic drugs, natural products and supplements have been employed. Quercetin is an antioxidant supplement that has been used in the treatment of a variety of ailments. This work is aimed at investigating the role of quercetin in attenuating spermato-toxicity and testicular-histopathology induced by cyanide. Seventy-two (72) male wistar rat (weight 190 g ± 10 g) were divided into nine groups (n = 8) except for groups 4 and 5 with (n = 16). Group 1 (control) received physiological saline while Groups 2 and 3 received 0.5 and 1 mg/kg body weight (bwt) cyanide respectively for 56 days, groups 4 and 5 received 0.5 and 1 mg/kg bwt cyanide respectively for 30 days. At day 30, eight animals were sacrificed from Groups 4 and 5 and the remaining eight (8) rats were subdivided into groups (6 and 7) and were given 20 and 40 mg/kg bwt of quercetin respectively for twenty-six days. Co-administration of cyanide and quercetin at a dose of 0.5 mg/kg cyanide +20 mg/kg quercetin and 1 mg/kg cyanide +40 mg/kg quercetin were given to group 8 and 9 respectively for 56 days. Significant decreases in sperm parameters (count, motile and normal sperm) and increases in malondiadehyde concentration were observed in the cyanide treated groups. Testicular histoarchitecture showed few to no spermatozoa in the lumen of rats treated with cyanide. All these effects were attenuated by quercetin. In conclusion, quercetin regulates testicular histopathology induced by cyanide in Wistar rats. Data from this work suggests potential preventive or therapeutic applications of quercetin for individuals subjected to cyanide environmental pollution.
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Affiliation(s)
- Adeoye O. Oyewopo
- Department of Anatomy, College of Health Sciences, University of Ilorin, Ilorin, Kwara State, Nigeria
- Corresponding author.
| | - Opeyemi Adeleke
- Department of Anatomy, College of Health Sciences, Osun State University, Osogbo, Osun State, Nigeria
| | - Olawumi Johnson
- Department of Anatomy, University of Medical Sciences, Ondo City, Ondo State, Nigeria
| | - Adebanji Akingbade
- Department of Anatomy, College of Medicine and Health Sciences, Ekiti State University, Ekiti State, Nigeria
| | - Kehinde S. Olaniyi
- Department of Physiology, College of Health Sciences, Afe Babalola University, Ado Ekiti, Ekiti State, Nigeria
- Department of Physiology, College of Health Sciences, University of Ilorin, Ilorin, Kwara State, Nigeria
| | - Emmanuel D. Areola
- Department of Physiology, College of Health Sciences, University of Ilorin, Ilorin, Kwara State, Nigeria
| | - Olorunfemi Tokunbo
- Department of Anatomy, College of Health Sciences, Osun State University, Osogbo, Osun State, Nigeria
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Cordeiro DA, Costa GMJ, França LR. Testis structure, duration of spermatogenesis and daily sperm production in four wild cricetid rodent species (A. cursor, A. montensis, N. lasiurus, and O. nigripes). PLoS One 2021; 16:e0251256. [PMID: 34014973 PMCID: PMC8136699 DOI: 10.1371/journal.pone.0251256] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 04/23/2021] [Indexed: 11/24/2022] Open
Abstract
Although rodents represent approximately 40% of all living mammalian species, our knowledge regarding their reproductive biology is still scarce. Due to their high vulnerability to environmental changes, wild rodents have become beneficial models for ecological studies. Thus, we aimed to comparatively investigate key functional testis parameters in four sexually mature wild rodent species (A. cursor, A. montensis, N. lasiurus, and O. nigripes). These species belong to the Cricetidae family, which is the most diverse family of rodents in South America, with a total of ~120 species in Brazil. The results found for the gonadosomatic index and the sickled sperm head shape observed strongly suggest that the species here evaluated are promiscuous, prolific, and short-lived. The duration of spermatogenesis was relatively short and varied from ~35–40 days. Both the percentage of seminiferous tubules (ST) in the testis parenchyma (~95–97%) and the number of Sertoli cells (SC) (~48–70 million) per testis gram were very high, whereas a fairly good SC efficiency (~8–13 round spermatids per SC) was observed. In comparison to other mammalian species studied, particularly the rodents of the suborder Myomorpha (i.e. hamsters, rats and mice), the rodents herein investigated exhibited very high (~62–80 million) daily sperm production per testis gram. This impressive spermatogenic efficiency resulted mainly from the short duration of spermatogenesis and quite high values found for the ST percentage in the testis and the SC number per testis gram. We expect that the knowledge here obtained will help conservation programs and the proper management of wildlife.
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Affiliation(s)
- Dirceu A. Cordeiro
- Laboratory of Cellular Biology, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais—UFMG, Belo Horizonte, MG, Brazil
- UNINCOR, Três Corações, MG, Brazil
| | - Guilherme M. J. Costa
- Laboratory of Cellular Biology, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais—UFMG, Belo Horizonte, MG, Brazil
| | - Luiz R. França
- Laboratory of Cellular Biology, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais—UFMG, Belo Horizonte, MG, Brazil
- * E-mail:
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Meyer V, Klose M, Lerchl A. Spermatogenesis in the Roborovski hamster (Phodopus roborovskii) and the Chinese hamster (Cricetulus griseus). Andrology 2021; 9:1617-1630. [PMID: 33987974 DOI: 10.1111/andr.13035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 05/04/2021] [Accepted: 05/06/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND Spermatogenesis is an elaborately organized and tightly regulated differentiation process. The spermatogenesis duration is stable within a certain species but highly variable between species of the same family. OBJECTIVES In this study, the spermatogenesis duration of the Roborovski hamster was measured for the first time, and the spermatogenesis duration of the Chinese hamster was re-assessed. MATERIALS AND METHODS Stage classification and cycle length measurement were carried out by labeling the dividing cells with bromodeoxyuridine and an antibody-based chromogen as well as with the periodic acid-Schiff/hematoxylin stain. Analysis was conducted using reference calculation and linear regression. Morphological measurements completed our set of methods. RESULTS The mean duration of one seminiferous epithelium cycle was 8.58 ± 0.34 days (mean ± SEM; Phodopus roborovskii) and 16.59 ± 0.47 days (Cricetulus griseus) based on the reference calculation. Slightly higher results were obtained using linear regression analysis: 9.72 ± 0.41 days for P. roborovskii and 17.64 ± 0.61 days for C. griseus. Additionally, a newly developed exemplary flowchart was proposed for the Roborovski hamster to facilitate spermatogenesis stage classification also in other species. The Chinese hamster presented an unexpectedly high paired epididymides weight of 1.701 ± 0.046 g (mean ± SEM) although having a body weight of only 40.5 ± 0.7 g. However, no significant correlation between the relative epididymis weight and spermatogenesis duration in mammals (Spearman rank correlation: r = -0.119, p = 0.607, n = 21) or rodents could be found (r = 0.045, p = 0.903, n = 11). CONCLUSION Our data emphasize the stability of the spermatogenesis duration within species and its remarkable variability between species. Further research is needed to identify the principal mechanisms and selection drivers that are responsible for such stability within species and the variability between species.
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Affiliation(s)
- Vivian Meyer
- Department of Life Sciences and Chemistry, Jacobs University, Bremen, Germany
| | - Melanie Klose
- Department of Life Sciences and Chemistry, Jacobs University, Bremen, Germany
| | - Alexander Lerchl
- Department of Life Sciences and Chemistry, Jacobs University, Bremen, Germany
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Pardhiya S, Gaharwar US, Gautam R, Priyadarshini E, Nirala JP, Rajamani P. Cumulative effects of manganese nanoparticle and radiofrequency radiation in male Wistar rats. Drug Chem Toxicol 2020; 45:1395-1407. [DOI: 10.1080/01480545.2020.1833905] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Sonali Pardhiya
- School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Usha Singh Gaharwar
- School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Rohit Gautam
- School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, India
| | | | - Jay Prakash Nirala
- School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Paulraj Rajamani
- School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, India
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High fat diet causes distinct aberrations in the testicular proteome. Int J Obes (Lond) 2020; 44:1958-1969. [PMID: 32678325 PMCID: PMC7445115 DOI: 10.1038/s41366-020-0595-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 04/22/2020] [Accepted: 05/05/2020] [Indexed: 12/20/2022]
Abstract
Diet has important effects on normal physiology and the potential deleterious effects of high fat diets and obesity on male reproductive health are being increasingly described. We conducted a histological review of the effects of chronic high fat (HF) diet (using a mouse model fed a 45% fat diet for 21 weeks) with a discovery proteomic study to assess for changes in the abundance of proteins in the testis. Mice on a HF diet became obese and developed glucose intolerance. Using mass spectrometry, we identify 102 proteins affected in the testis of obese mice. These included structural proteins important for the blood testis barrier (filamin A, FLNA), proteins involved in oxidative stress responses (spermatogenesis associated 20, SPATA-20) and lipid homoeostasis (sterol regulatory element-binding protein 2, SREBP2 and apolipoprotein A1, APOA1). In addition, an important regulator protein paraspeckle component 1, PSPC-1, which interacts with the androgen receptor was significantly downregulated. Proteomic data was validated using both Western blotting and immunostaining which confirmed and localised protein expression in both mouse and human testis using biopsy specimens. This study focused mainly on the abnormalities that occurred at the protein level and as a result, we have identified several candidate proteins and conducted pathway analysis around the effects of HF diet on the testis providing novel insights not previously described. Some of the identified targets could be targeted therapeutically and future work is directed in this area.
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Breed WG, Ding X, Tuke J, Leigh C. Morphological diversity of the spermatozoon and male reproductive tract in Australian Hopping mice, genus
Notomys
– is it determined by sexual selection? J Zool (1987) 2020. [DOI: 10.1111/jzo.12779] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- W. G. Breed
- School of Biological Sciences Faculty of Sciences and The Robinson Research Institute The University of Adelaide Adelaide SA Australia
| | - X. Ding
- Adelaide Medical School Faculty of Health and Medical Sciences The University of Adelaide Adelaide SA Australia
| | - J. Tuke
- School of Mathematical Sciences The University of Adelaide SA Australia
| | - C.M. Leigh
- Adelaide Medical School Faculty of Health and Medical Sciences The University of Adelaide Adelaide SA Australia
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Viana PIM, Farias TO, Talamoni SA, Godinho HP. Sertoli Cell Efficiency of the Neotropical Bats Anoura geoffroyi, Artibeus lituratus and Myotis levis (Mammalia: Chiroptera). ACTA CHIROPTEROLOGICA 2019. [DOI: 10.3161/15081109acc2018.20.2.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Pedro I. M. Viana
- Programa de Pós-graduação em Biologia de Vertebrados, Departamento de Ciências Biológicas, Pontifícia Universidade Católica de Minas Gerais, Avenida Dom José Gaspar, 500, Belo Horizonte, Minas Gerais, Brazil
| | - Talita O. Farias
- Programa de Pós-graduação em Biologia de Vertebrados, Departamento de Ciências Biológicas, Pontifícia Universidade Católica de Minas Gerais, Avenida Dom José Gaspar, 500, Belo Horizonte, Minas Gerais, Brazil
| | - Sonia A. Talamoni
- Programa de Pós-graduação em Biologia de Vertebrados, Departamento de Ciências Biológicas, Pontifícia Universidade Católica de Minas Gerais, Avenida Dom José Gaspar, 500, Belo Horizonte, Minas Gerais, Brazil
| | - Hugo P. Godinho
- Programa de Pós-graduação em Biologia de Vertebrados, Departamento de Ciências Biológicas, Pontifícia Universidade Católica de Minas Gerais, Avenida Dom José Gaspar, 500, Belo Horizonte, Minas Gerais, Brazil
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Adebayo AO, Akinloye AK, Ihunwo AO, Taiwo VO, Oke BO. Ultrastructural Studies of Acrosomal Formation in the Testis of Male Greater Cane Rat ( Thryonomys swinderianus). J Microsc Ultrastruct 2019; 7:14-18. [PMID: 31008052 PMCID: PMC6442327 DOI: 10.4103/jmau.jmau_28_18] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Purpose: In furthering the understanding of the process of spermatogenesis in the greater cane rat, this study describes the ultrastructural spermiogenic transformation and acrosomal formation in the testes of this hystricomorphic rodent that is currently undergoing domestication in parts of West Africa. Materials and Methods: Testicular samples were obtained from ten sexually mature cane rats that were perfused-fixed using Karnovsky's fixative (phosphate buffered 2% paraformaldehyde – 2.5% glutaraldehyde fixative at pH 7.4). The samples were processed for ultrastructural analysis and examined under the transmission electron microscope. Results: The testes of the cane rat showed uniqueness in its cellular associations and the ultrastructure of the spermatogenic cells especially in the formation of the acrosome. The spermatid differentiation and acrosomal formation occurred in 12 steps with the first three steps being the Golgi phase and the next three steps making up the cap phase. While the three steps that follow constitute the acrosomal phase, the last 3 steps make up the maturation phase. At the cap and acrosomal phases, the entire acrosomal system comprising the vesicle and granule covers the head of the spermatids with no clear indentation of the nuclear surface by the formed acrosome. Furthermore, elongated spermatids at the maturation phase contained abundance of nuclear vacuoles. Conclusion: This work has not only provided information that will further the understanding of spermatogenesis but also aid the understanding of acrosomal reaction in the reproduction of the greater cane rat.
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Affiliation(s)
- A O Adebayo
- Department of Veterinary Anatomy, College of Veterinary Medicine, Federal University of Agriculture, Abeokuta, Nigeria
| | - A K Akinloye
- Department of Veterinary Anatomy, College of Veterinary Medicine, Federal University of Agriculture, Abeokuta, Nigeria
| | - A O Ihunwo
- School of Anatomical Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - V O Taiwo
- Department of Veterinary Pathology, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
| | - B O Oke
- Department of Veterinary Anatomy, Faculty of Veterinary Medicine, University of Ibadan, Ibadan, Nigeria
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12
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Negrin AC, de Jesus MM, Christante CM, da Silva DGH, Taboga SR, Pinto-Fochi ME, Góes RM. Maternal supplementation with corn oil associated or not with di-n-butyl phthalate increases circulating estradiol levels of gerbil offspring and impairs sperm reserve. Reprod Toxicol 2018; 81:168-179. [PMID: 30103012 DOI: 10.1016/j.reprotox.2018.08.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 08/07/2018] [Accepted: 08/09/2018] [Indexed: 10/28/2022]
Abstract
This study evaluated the consequences of gestational exposure to di-n-butyl phthalate (DBP) for testicular steroidogenesis and sperm parameters of the adult gerbil and the interference of corn oil (co), a vehicle widely used for administration of liposoluble agents, on DBP effects. Pregnant gerbils received no treatment or were treated from gestational day 8 to 23 via gavage with 0.1 mL/day of co only or containing DBP (100 mg/kg/day). Maternal co intake enhanced serum estradiol levels and testicular content of ERα, and reduced sperm reserve of adult offspring. Gestational DBP exposure caused dyslipidemia, increased serum and intratesticular estradiol levels and reduced sperm reserve and motility. Thus, maternal co supplementation alters circulating estradiol and impairs sperm quantity and quality of offspring. Gestational DBP exposure alters lipid metabolism and testicular steroidogenesis and worsens the negative effects of co on the sperm reserve and motility of gerbil. Therefore, co interferes with the reproductive response to DBP.
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Affiliation(s)
- Ana Carolina Negrin
- Department of Functional and Structural Biology, Institute of Biology, University of Campinas - UNICAMP, Campinas, SP, Brazil.
| | - Mariana Marcielo de Jesus
- Department of Functional and Structural Biology, Institute of Biology, University of Campinas - UNICAMP, Campinas, SP, Brazil.
| | - Caroline Maria Christante
- Department of Functional and Structural Biology, Institute of Biology, University of Campinas - UNICAMP, Campinas, SP, Brazil.
| | - Danilo Grünig Humberto da Silva
- Department of Chemistry and Environmental Sciences, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University - UNESP, São José do Rio Preto, SP, Brazil.
| | - Sebastião Roberto Taboga
- Department of Functional and Structural Biology, Institute of Biology, University of Campinas - UNICAMP, Campinas, SP, Brazil; Department of Biology, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University - UNESP, São José do Rio Preto, SP, Brazil.
| | - Maria Etelvina Pinto-Fochi
- Department of Biology, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University - UNESP, São José do Rio Preto, SP, Brazil; Faculdade de Medicina, União das Faculdades dos Grandes Lagos - UNILAGO, São José do Rio Preto, SP, Brazil.
| | - Rejane Maira Góes
- Department of Functional and Structural Biology, Institute of Biology, University of Campinas - UNICAMP, Campinas, SP, Brazil; Department of Biology, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University - UNESP, São José do Rio Preto, SP, Brazil.
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Characterization of Seminiferous Epithelium Stages in the Wild Javan Muntjac ( Muntiacus muntjak muntjak) Using the Tubular Morphology Method. Vet Med Int 2018; 2018:3024532. [PMID: 30026905 PMCID: PMC6031200 DOI: 10.1155/2018/3024532] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 04/18/2018] [Accepted: 05/20/2018] [Indexed: 12/04/2022] Open
Abstract
Stages of the seminiferous epithelium of the testis of the wild Javan muntjac (Muntiacus muntjak muntjak) in hard antler period were characterized based on the tubular morphology method. The number and the relative frequencies of seminiferous epithelium stages and the morphometry of germinal cell nuclei were identified microscopically. We identified eight stages of seminiferous epithelium in testicular tissue of the Javan muntjac and found that the relative frequencies of stages I to VIII were 14.87, 15.12, 17.75, 6.87, 7.37, 12.37, 13, and 12.62%, respectively. The diameter of the nuclei of germinal cells varied in each stage of seminiferous epithelium. Diplotene-stage primary spermatocytes had prominent and large nuclei ~8.97 ± 1.0 μm in stages III and IV. Pachytene primary spermatocytes appeared in most stages, except stage IV, whereas leptotene- and diplotene-stage primary spermatocytes were found in stages I and II, and III and IV, respectively. Round spermatids were observed in stages IV to VIII and in stage I but were absent in stages II and III, while elongated spermatids were observed in all stages except stage I. Our findings show that the stages of seminiferous epithelium in the Javan muntjac are similar to those found in neotropical cervids, small ruminants, and other domestic animals.
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Adebayo A, Akinloye A, Ihunwo A, Taiwo V, Oke B. Ultrastructural studies of Acrosomal formation in the testis of male greater cane rat ( Thryonomys swinderianus ). J Microsc Ultrastruct 2017. [DOI: 10.1016/j.jmau.2017.05.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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15
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Pinto-Fochi ME, Negrin AC, Scarano WR, Taboga SR, Góes RM. Sexual maturation of the Mongolian gerbil (Meriones unguiculatus): a histological, hormonal and spermatic evaluation. Reprod Fertil Dev 2016; 28:815-23. [DOI: 10.1071/rd14074] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Accepted: 10/09/2014] [Indexed: 11/23/2022] Open
Abstract
This study determined the phases of sexual development of the male Mongolian gerbil (Meriones unguiculatus) based on an integrative analysis of testicular morphology, hormonal data and sperm parameters. Male gerbils were analysed at 1, 7, 14, 21, 28, 35, 42, 50, 60, 70, 90, 100 and 120 days of age. Body, testicular and epididymal weights increased up to Day 70, 60 and 90, respectively. The impuberal phase, characterised by the presence of gonocytes, extended until Day 14. The prepubertal period lasted until Day 42, when puberty was achieved and a drastic increase in serum testosterone levels, mature adult Leydig cells and elongated spermatids was observed. Gerbils at 60 days of age showed a remarkable number of spermatozoa in the testis, epididymidis caput/corpus and cauda, and at Day 70 the maximum daily sperm production was reached. However, the gerbil may be considered sexually mature only from Day 90 onward, when sperm reserves become stable. The total transit time of spermatozoa along the epididymis of sexually mature gerbils was 11 days, with 1 day in the caput/corpus and 10 days in the cauda. These data cover a lacuna regarding the reproductive parameters of this rodent and provide foundations for its use in testicular toxicology studies.
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Beyond Testis Size: Links between Spermatogenesis and Sperm Traits in a Seasonal Breeding Mammal. PLoS One 2015; 10:e0139240. [PMID: 26430740 PMCID: PMC4592251 DOI: 10.1371/journal.pone.0139240] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 09/10/2015] [Indexed: 01/21/2023] Open
Abstract
Spermatogenesis is a costly process that is expected to be under selection to maximise sperm quantity and quality. Testis size is often regarded as a proxy measure of sperm investment, implicitly overlooking the quantitative assessment of spermatogenesis. An enhanced understanding of testicular function, beyond testis size, may reveal further sexual traits involved in sperm quantity and quality. Here, we first estimated the inter-male variation in testicular function and sperm traits in red deer across the breeding and non-breeding seasons. Then, we analysed the relationships between the testis mass, eight parameters of spermatogenic function, and seven parameters of sperm quality. Our findings revealed that the Sertoli cell number and function parameters vary greatly between red deer males, and that spermatogenic activity co-varies with testis mass and sperm quality across the breeding and non-breeding seasons. For the first time in a seasonal breeder, we found that not only is the Sertoli cell number important in determining testis mass (r = 0.619, p = 0.007 and r = 0.248, p = 0.047 for the Sertoli cell number assessed by histology and cytology, respectively), but also sperm function (r = 0.703, p = 0.002 and r = 0.328, p = 0.012 for the Sertoli cell number assessed by histology and cytology, respectively). Testicular histology also revealed that a high Sertoli cell number per tubular cross-section is associated with high sperm production (r = 0.600, p = 0.009). Sperm production and function were also positively correlated (r = 0.384, p = 0.004), suggesting that these traits co-vary to maximise sperm fertilisation ability in red deer. In conclusion, our findings contribute to the understanding of the dynamics of spermatogenesis, and reveal new insights into the role of testicular function and the Sertoli cell number on testis size and sperm quality in red deer.
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Pintus E, Ros-Santaella JL, Garde JJ. Variation of spermatogenic and Sertoli cell number detected by fine needle aspiration cytology (FNAC) in Iberian red deer during and out of the breeding season. Reprod Fertil Dev 2015; 27:812-22. [DOI: 10.1071/rd13419] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Accepted: 01/25/2014] [Indexed: 01/18/2023] Open
Abstract
The aim of the present study was to evaluate spermatogenesis in Iberian red deer, a short-day seasonal breeder, using the fine needle aspiration cytology (FNAC) technique. Reports on spermatogenesis in deer are limited and here, for the first time, FNAC has been used to evaluate changes in such physiological process during and out of the breeding season. Testes were collected from 51 stags from November 2010 to February 2011. The Sertoli index and spermatic index were significantly higher during the breeding season than out of the breeding season (P = 0.0477 and P = 0.0125, respectively). A similar pattern was described by histological analysis, in which both Sertoli cell number per tubular cross-section and Johnsen score decreased significantly from the breeding season to the non-breeding season (P = 0.0131 and P = 0.0010, respectively). Data provided by FNAC were correlated with histology: the Sertoli index was positively correlated with Sertoli cell number per tubular cross-section (P = 0.0015), whereas the spermatic index was correlated with the Johnsen score (P = 0.0497). The results of the present study indicate that FNAC is a reliable technique to evaluate spermatogenesis in Iberian red deer and suggest that Sertoli cell number is not stable in these species, reaching highest values during the breeding season.
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Oduwole OO, Vydra N, Wood NEM, Samanta L, Owen L, Keevil B, Donaldson M, Naresh K, Huhtaniemi IT. Overlapping dose responses of spermatogenic and extragonadal testosterone actions jeopardize the principle of hormonal male contraception. FASEB J 2014; 28:2566-76. [PMID: 24599970 PMCID: PMC4376501 DOI: 10.1096/fj.13-249219] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Testosterone (T), alone or in combination with progestin, provides a promising approach to hormonal male contraception. Its principle relies on enhanced negative feedback of exogenous T to suppress gonadotropins, thereby blocking the testicular T production needed for spermatogenesis, while simultaneously maintaining the extragonadal androgen actions, such as potency and libido, to avoid hypogonadism. A serious drawback of the treatment is that a significant proportion of men do not reach azoospermia or severe oligozoospermia, commensurate with contraceptive efficacy. We tested here, using hypogonadal luteinizing hormone/choriongonadotropin receptor (LHCGR) knockout (LHR−/−) mice, the basic principle of the T-based male contraceptive method, that a specific T dose could maintain extragonadal androgen actions without simultaneously activating spermatogenesis. LHR−/− mice were treated with increasing T doses, and the responses of their spermatogenesis and extragonadal androgen actions (including gonadotropin suppression and sexual behavior) were assessed. Conspicuously, all dose responses to T were practically superimposable, and no dose of T could be defined that would maintain sexual function and suppress gonadotropins without simultaneously activating spermatogenesis. This finding, never addressed in clinical contraceptive trials, is not unexpected in light of the same androgen receptor mediating androgen actions in all organs. When extrapolated to humans, our findings may jeopardize the current approach to hormonal male contraception and call for more effective means of inhibiting intratesticular T production or action, to achieve consistent spermatogenic suppression.—Oduwole, O. O., Vydra, N., Wood, N. E. M., Samanta, L., Owen, L., Keevil, B., Donaldson, M., Naresh, K., Huhtaniemi, I. T. Overlapping dose responses of spermatogenic and extragonadal testosterone actions jeopardize the principle of hormonal male contraception.
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Affiliation(s)
- Olayiwola O Oduwole
- Institute of Reproductive and Developmental Biology, Department of Surgery and Cancer, and
| | - Natalia Vydra
- Institute of Reproductive and Developmental Biology, Department of Surgery and Cancer, and Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Gliwice, Poland
| | - Nicholas E M Wood
- Institute of Reproductive and Developmental Biology, Department of Surgery and Cancer, and
| | - Luna Samanta
- Institute of Reproductive and Developmental Biology, Department of Surgery and Cancer, and Biochemistry Laboratory, Department of Zoology, School of Life Sciences, Ravenshaw University, Cuttack, India
| | - Laura Owen
- Biochemistry Department, University Hospital of South Manchester, Manchester, UK; and
| | - Brian Keevil
- Biochemistry Department, University Hospital of South Manchester, Manchester, UK; and
| | - Mandy Donaldson
- Department of Clinical Biochemistry, Imperial College Healthcare National Health Service Trust, Charing Cross Hospital, London, UK
| | - Kikkeri Naresh
- Department of Histopathology, Imperial College Healthcare National Health Service Trust, Imperial College London, Hammersmith Campus, London, UK
| | - Ilpo T Huhtaniemi
- Institute of Reproductive and Developmental Biology, Department of Surgery and Cancer, and
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delBarco-Trillo J, Tourmente M, Roldan ERS. Metabolic rate limits the effect of sperm competition on mammalian spermatogenesis. PLoS One 2013; 8:e76510. [PMID: 24069461 PMCID: PMC3777943 DOI: 10.1371/journal.pone.0076510] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Accepted: 08/29/2013] [Indexed: 11/24/2022] Open
Abstract
Sperm competition leads to increased sperm production in many taxa. This response may result from increases in testes size, changes in testicular architecture or changes in the kinetics of spermatogenesis, but the impact of each one of these processes on sperm production has not been studied in an integrated manner. Furthermore, such response may be limited in species with low mass-specific metabolic rate (MSMR), i.e., large-bodied species, because they cannot process energy and resources efficiently enough both at the organismic and cellular levels. Here we compare 99 mammalian species and show that higher levels of sperm competition correlated with a) higher proportions of seminiferous tubules, b) shorter seminiferous epithelium cycle lengths (SECL) which reduce the time required to produce sperm, and c) higher efficiencies of Sertoli cells (involved in sperm maturation). These responses to sperm competition, in turn, result in higher daily sperm production, more sperm stored in the epididymides, and more sperm in the ejaculate. However, the two processes that require processing resources at faster rates (SECL and efficiency of Sertoli cells) only respond to sperm competition in species with high MSMR. Thus, increases in sperm production with intense sperm competition occur via a complex network of mechanisms, but some are constrained by MSMR.
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Affiliation(s)
- Javier delBarco-Trillo
- Reproductive Ecology and Biology Group, Museo Nacional de Ciencias Naturales, Consejo Superior de Investigaciones Científicas, Madrid, Spain
- * E-mail:
| | - Maximiliano Tourmente
- Reproductive Ecology and Biology Group, Museo Nacional de Ciencias Naturales, Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - Eduardo R. S. Roldan
- Reproductive Ecology and Biology Group, Museo Nacional de Ciencias Naturales, Consejo Superior de Investigaciones Científicas, Madrid, Spain
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Machado Júnior A, Oliveira L, Assis Neto A, Alves F, Miglino M, Carvalho M. Spermatogenesis in goats with and without scrotum bipartition. Anim Reprod Sci 2012; 130:42-50. [DOI: 10.1016/j.anireprosci.2011.12.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2010] [Revised: 12/20/2011] [Accepted: 12/21/2011] [Indexed: 11/15/2022]
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21
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Lüpold S, Wistuba J, Damm OS, Rivers JW, Birkhead TR. Sperm competition leads to functional adaptations in avian testes to maximize sperm quantity and quality. Reproduction 2011; 141:595-605. [PMID: 21307271 DOI: 10.1530/rep-10-0501] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The outcome of sperm competition (i.e. competition for fertilization between ejaculates from different males) is primarily determined by the relative number and quality of rival sperm. Therefore, the testes are under strong selection to maximize both sperm number and quality, which are likely to result in trade-offs in the process of spermatogenesis (e.g. between the rate of spermatogenesis and sperm length or sperm energetics). Comparative studies have shown positive associations between the level of sperm competition and both relative testis size and the proportion of seminiferous (sperm-producing) tissue within the testes. However, it is unknown how the seminiferous tissue itself or the process of spermatogenesis might evolve in response to sperm competition. Therefore, we quantified the different germ cell types and Sertoli cells (SC) in testes to assess the efficiency of sperm production and its associations with sperm length and mating system across 10 species of New World Blackbirds (Icteridae) that show marked variation in sperm length and sperm competition level. We found that species under strong sperm competition generate more round spermatids (RS)/spermatogonium and have SC that support a greater number of germ cells, both of which are likely to increase the maximum sperm output. However, fewer of the RS appeared to elongate to mature spermatozoa in these species, which might be the result of selection for discarding spermatids with undesirable characteristics as they develop. Our results suggest that, in addition to overall size and gross morphology, testes have also evolved functional adaptations to maximize sperm quantity and quality.
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Affiliation(s)
- Stefan Lüpold
- Department of Animal and Plant Sciences, University of Sheffield, Western Bank, Sheffield S10 2TN, UK.
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22
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Ramzan F, Qureshi IZ. Intraperitoneal kisspeptin-10 administration induces dose-dependent degenerative changes in maturing rat testes. Life Sci 2011; 88:246-56. [DOI: 10.1016/j.lfs.2010.11.019] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2010] [Revised: 10/16/2010] [Accepted: 11/15/2010] [Indexed: 11/29/2022]
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Pinto ME, Botta LS, Taboga SR, Góes RM. Neonatal Gonocyte Differentiation in Mongolian Gerbil Meriones unguiculatus Involves Asynchronous Maturation of Seminiferous Cords and Rapid Formation of Transitional Cell Stage. Anat Rec (Hoboken) 2009; 293:310-419. [DOI: 10.1002/ar.21050] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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24
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Pinto ME, Egydio FDM, Taboga SR, Mendis-Handagama SMLC, Góes RM. Differentiation of Leydig cells in the Mongolian gerbil. Microsc Res Tech 2009; 73:119-27. [PMID: 19697434 DOI: 10.1002/jemt.20763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Information on postnatal Leydig cell (LC) differentiation in the Mongolian gerbil has been unavailable. Therefore, current investigation was designed to examine LC lineage differentiationin this rodent, from birth to adulthood. Gerbil testes at 1 day, 1-7 weeks (w), 2 and 3 months of age were conventionally processed by light and transmission electron microscopy. Immunocytochemistry for specific markers of steroidogenic enzymes, namely 3beta-hydroxysteroid dehydrogenase (3beta-HSD) and 11beta-hydroxysteroid steroid dehydrogenase 1 (11beta-HSD1) and also for androgen receptor (AR) was performed. The establishment of adult Leydig cell populations (ALC) during testis maturation in the gerbil follows the pattern previously described in other mammalian species, with the four progressive stages of differentiation. The LC progenitors were identified at second w by 3beta-HSD expression; the first newly formed ALC were recognized at fourth w whereas immature ALC appeared at fifth w. The latter were recognized by abundance of cytoplasmic lipid, in addition to expression of 11beta-HSD1 and intense nuclear AR immunoreaction. Mature ALC in gerbil exhibited irregular eccentric nuclei and a cytoplasmic canaliculus in the perinuclear area. Only one third of mature ALC in adult gerbils showed a high expression of 11beta-HSD1 and AR expression was highly variable among them. In conclusion, the process of differentiation of ALC population in gerbil follows the pattern previously established for other rodents. However, the resulting mature ALC are strikingly different due their singular asymmetric morphology and presence of a cytoplasmic canaliculus and as well as their functional heterogeneity.
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Affiliation(s)
- Maria Etelvina Pinto
- Department of Cell Biology, Institute of Biology, State University of Campinas-UNICAMP, 13083-970, Campinas, SP, Brazil
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25
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Hayakawa D, Sasaki M, Suzuki M, Igota H, Kitamura N. Classification of the Seminiferous Epithelial Cycle in the Sika Deer (Cervus nippon). MAMMAL STUDY 2009. [DOI: 10.3106/041.034.0107] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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26
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Boiani L, Casanova G, Olivera A, Berois N. Seminiferous epithelium cycle of a hantavirus reservoir, the long-tailed mouse Oligoryzomys flavescens (Rodentia-Cricetidae). Tissue Cell 2007; 39:267-75. [PMID: 17675200 DOI: 10.1016/j.tice.2007.05.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2007] [Revised: 05/10/2007] [Accepted: 05/28/2007] [Indexed: 11/23/2022]
Abstract
Oligoryzomys flavescens, a common rodent of the temperate regions of South America, has been identified as a Hantavirus reservoir. There is still little information concerning its reproductive biology, which is essential to devise effective control measurement of natural populations. This rodent is a seasonal breeder and adult males exhibit a short period of testicular regression during winter months (June-August). In the present study we provided a histological and ultrastructural analysis of the composition of the testis of sexually mature O. flavescens during the breeding season. Over 95% of the testicular parenchyma was occupied by the seminiferous tubules and less than 5% by the interstitial tissue. The mean tubular diameter and epithelium height were 147.2 and 57.8 microm, respectively. The spermatogenic wave was characterized and eight spermatogenesis stages were identified according to the tubular morphology method. Their length, estimated as their relative frequencies, were (I-VIII) 8.8, 14.9, 4.0, 5.0, 10.4, 5.8, 27.0, and 23.9. Ultrastructural features of spermiogenesis are shown for the first time in a sigmodontine rodent.
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Affiliation(s)
- L Boiani
- Sección Biología Celular, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay.
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Oliveira AG, Telles LF, Hess RA, Mahecha GAB, Oliveira CA. Effects of the herbicide Roundup on the epididymal region of drakes Anas platyrhynchos. Reprod Toxicol 2007; 23:182-91. [PMID: 17166697 DOI: 10.1016/j.reprotox.2006.11.004] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2006] [Revised: 08/31/2006] [Accepted: 11/01/2006] [Indexed: 11/22/2022]
Abstract
Exposure to the Roundup has been shown to affect StAR protein and aromatase expression and activity, pointing out that this herbicide may cause adverse effects in animal reproduction by affecting androgen and estrogen synthesis. We tested this hypothesis by investigating the in vivo effects of the Roundup on the testis and epididymal region of drake Anas platyrhynchos. The exposure to the herbicide resulted in alterations in the structure of the testis and epididymal region as well as in the serum levels of testosterone and estradiol, with changes in the expression of androgen receptors restricted to the testis. The harmful effects were more conspicuous in the proximal efferent ductules and epididymal ducts, suggesting higher sensitivity of these segments among the male genital organs. The effects were mostly dose dependent, indicating that this herbicide may cause disorder in the morphophysiology of the male genital system of animals.
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Affiliation(s)
- André G Oliveira
- Department of Morphology of the Federal University of Minas Gerais, Cx. Postal 486, CEP 31.270-901, Belo Horizonte, MG, Brazil
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28
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Moreno RD, Alvarado CP. The mammalian acrosome as a secretory lysosome: new and old evidence. Mol Reprod Dev 2006; 73:1430-4. [PMID: 16894549 DOI: 10.1002/mrd.20581] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The morphological and biochemical characteristics of the acrosome depart well from any other vesicles in somatic cells, making it one of a kind amongst secretory vesicles. The components of the acrosome include a mixture of unique enzymes like acrosin and other enzymes that when present in somatic cells are commonly found in lysosomes, peroxisomes, and even in the cytoplasm. Several observations have pointed out that acrosomal biogenesis has unique features not previously described in secretory vesicle biogenesis of somatic cells. In this review we discuss the evidence supporting a molecular link between the machinery involved in lysosome and acrosome biogenesis, link which may help account for the acrosome unique composition.
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Affiliation(s)
- Ricardo D Moreno
- Departamento de Ciencias Fisiológicas, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile and Millennium Nucleus for Developmental Biology, Santiago, Chile.
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