1
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Marín-Gual L, González-Rodelas L, M. Garcias M, Kratochvíl L, Valenzuela N, Georges A, Waters PD, Ruiz-Herrera A. Meiotic chromosome dynamics and double strand break formation in reptiles. Front Cell Dev Biol 2022; 10:1009776. [PMID: 36313577 PMCID: PMC9597255 DOI: 10.3389/fcell.2022.1009776] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 09/23/2022] [Indexed: 11/13/2022] Open
Abstract
During meiotic prophase I, tightly regulated processes take place, from pairing and synapsis of homologous chromosomes to recombination, which are essential for the generation of genetically variable haploid gametes. These processes have canonical meiotic features conserved across different phylogenetic groups. However, the dynamics of meiotic prophase I in non-mammalian vertebrates are poorly known. Here, we compare four species from Sauropsida to understand the regulation of meiotic prophase I in reptiles: the Australian central bearded dragon (Pogona vitticeps), two geckos (Paroedura picta and Coleonyx variegatus) and the painted turtle (Chrysemys picta). We first performed a histological characterization of the spermatogenesis process in both the bearded dragon and the painted turtle. We then analyzed prophase I dynamics, including chromosome pairing, synapsis and the formation of double strand breaks (DSBs). We show that meiosis progression is highly conserved in reptiles with telomeres clustering forming the bouquet, which we propose promotes homologous pairing and synapsis, along with facilitating the early pairing of micro-chromosomes during prophase I (i.e., early zygotene). Moreover, we detected low levels of meiotic DSB formation in all taxa. Our results provide new insights into reptile meiosis.
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Affiliation(s)
- Laia Marín-Gual
- Departament de Biologia Cel·lular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain
- Genome Integrity and Instability Group, Institut de Biotecnologia i Biomedicina, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain
| | - Laura González-Rodelas
- Departament de Biologia Cel·lular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain
- Genome Integrity and Instability Group, Institut de Biotecnologia i Biomedicina, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain
| | - Maria M. Garcias
- Departament de Biologia Cel·lular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain
- Genome Integrity and Instability Group, Institut de Biotecnologia i Biomedicina, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain
| | - Lukáš Kratochvíl
- Department of Ecology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Nicole Valenzuela
- Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, IA, United States
| | - Arthur Georges
- Institute for Applied Ecology, University of Canberra, Canberra, ACT, Australia
| | - Paul D. Waters
- School of Biotechnology and Biomolecular Sciences, Faculty of Science, UNSW, Sydney, NSW, Australia
| | - Aurora Ruiz-Herrera
- Departament de Biologia Cel·lular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain
- Genome Integrity and Instability Group, Institut de Biotecnologia i Biomedicina, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain
- *Correspondence: Aurora Ruiz-Herrera,
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2
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Yang Y, Li Y, Wang Y, Hu J, Zhang M, Sun Y, Gu W, Zhang Y, Sun J, Jacques KJ, Xu S. The ultrastructure of spermatogenic cells and morphological evaluation of testicular development in the silver pomfret (Pampus argenteus). Anat Histol Embryol 2021; 50:1034-1042. [PMID: 34655102 DOI: 10.1111/ahe.12747] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 08/31/2021] [Accepted: 09/24/2021] [Indexed: 11/28/2022]
Abstract
The silver pomfret (Pampus argenteus) is a widely distributed and economically important marine fish in the Indo-Pacific. In this study, we acquired the second generation of wild P. argenteus by artificial breeding and further studied the testicular development and ultrastructure of spermatogenesis. The results of gonadosomatic index (GSI) showed the spawning period of this marine fish was from April to June. Besides, through morphological analysis, we found that P. argenteus had an anastomosing tubular testis surrounded by a layer of tunica albuginea, in which spermatogenesis occurred in cysts where the synchronous germ cells were completely surrounded by the cytoplasmic projection of Sertoli cells. Meanwhile, based on submicroscopic characteristics, the germ cells are classified into nine different types. During the ontogenesis of testis, both the early stage of spermatogenesis and sperm were observed in P. argenteus. At sperm maturation stage, different types of spermatozoa and activation of sperms occurred non-synchronously in the tubules. Cytoplasmic bridges also were observed among synchronous germ cells within the cysts, suggesting an interrelated and differentiated relationship among these germ cells.
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Affiliation(s)
- Yang Yang
- College of Marine Science, Ningbo University, Ningbo, China.,Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China.,Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China.,Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China
| | - Yaya Li
- College of Marine Science, Ningbo University, Ningbo, China.,Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China.,Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China.,Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China
| | - Yajun Wang
- College of Marine Science, Ningbo University, Ningbo, China.,Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China.,Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China.,Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China
| | - Jiabao Hu
- College of Marine Science, Ningbo University, Ningbo, China.,Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China.,Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China.,Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China
| | - Man Zhang
- College of Marine Science, Ningbo University, Ningbo, China.,Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China.,Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China.,Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China
| | - Yibo Sun
- College of Marine Science, Ningbo University, Ningbo, China.,Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China.,Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China.,Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China
| | - Weiwei Gu
- College of Marine Science, Ningbo University, Ningbo, China.,Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China.,Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China.,Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China
| | - Youyi Zhang
- College of Marine Science, Ningbo University, Ningbo, China.,Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China.,Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China.,Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China
| | - Jiachu Sun
- College of Marine Science, Ningbo University, Ningbo, China.,Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China.,Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China.,Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China
| | - Kimran Jean Jacques
- College of Marine Science, Ningbo University, Ningbo, China.,Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China.,Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China.,Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China
| | - Shanliang Xu
- College of Marine Science, Ningbo University, Ningbo, China.,Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, China.,Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China.,Key Laboratory of Applied Marine Biotechnology, Ningbo University, Ministry of Education, Ningbo, China
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3
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Šturm S, Švara T, Spörndly-Nees E, Cerkvenik-Flajs V, Gombač M, Weber AL, Weber K. Seminiferous epithelium cycle staging based on the development of the acrosome in ram testis. J Toxicol Pathol 2021; 34:331-338. [PMID: 34621108 PMCID: PMC8484928 DOI: 10.1293/tox.2021-0025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 06/29/2021] [Indexed: 11/19/2022] Open
Abstract
Testicular histopathology is considered the most sensitive and reliable method to detect the effects of chemicals on sperm production. To carry out a sensitive examination of testicular histopathology and interpret the changes require knowledge of spermatogenic stages. Spermatogenic staging based on acrosome development during spermiogenesis is conventionally performed in animal species routinely used for research and toxicity testing. In contrast, small ruminants, such as sheep and goats, are rarely used as animal models to evaluate toxicity in male reproductive organs. To the best of our knowledge, a comparable spermatogenic staging system in rams has not yet been fully characterised. Hence, this study aimed to adapt the existing spermatogenic staging based on acrosome development in bull testes to fit the seminiferous epithelium cycle of ram testes. The results show that spermatogenic staging based on acrosome development in bull testes can, with slight modifications, be efficiently used for the staging of ram testes.
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Affiliation(s)
- Sabina Šturm
- Institute of Pathology, Wild Animals, Fish and Bees, Veterinary Faculty, University of Ljubljana, Gerbičeva 60, Ljubljana, 1000, Slovenia
| | - Tanja Švara
- Institute of Pathology, Wild Animals, Fish and Bees, Veterinary Faculty, University of Ljubljana, Gerbičeva 60, Ljubljana, 1000, Slovenia
| | - Ellinor Spörndly-Nees
- Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, Box 7011, 75007, Sweden
| | - Vesna Cerkvenik-Flajs
- Institute of Pathology, Wild Animals, Fish and Bees, Veterinary Faculty, University of Ljubljana, Gerbičeva 60, Ljubljana, 1000, Slovenia
| | - Mitja Gombač
- Institute of Pathology, Wild Animals, Fish and Bees, Veterinary Faculty, University of Ljubljana, Gerbičeva 60, Ljubljana, 1000, Slovenia
| | - Anna-Luisa Weber
- AnaPath Services GmbH, Hammerstrasse 49, Liestal, 4410, Switzerland
| | - Klaus Weber
- AnaPath Services GmbH, Hammerstrasse 49, Liestal, 4410, Switzerland
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4
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Maschio GF, da Rocha RM, dos Santos-Costa MC, Barros Barbosa LDN, dos Santos KSF, Costa Prudente ALD. Aspects of the Reproductive Biology and Beeding Habits of Leptodeira annulata
(Serpentes, Imantodini) in Eastern Amazonia. SOUTH AMERICAN JOURNAL OF HERPETOLOGY 2021. [DOI: 10.2994/sajh-d-17-00080.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Gleomar Fabiano Maschio
- Laboratório Interdisciplinar do Ensino de Biologia a Distância, Instituto de Ciências Biológicas, Universidade Federal do Pará. Rua Augusto Corrêa, 01, CEP 66075-110, Belém, Pará, Brazil
| | - Rossineide Martins da Rocha
- Laboratório de Ultraestrutura Celular, Instituto de Ciências Biológicas, Universidade Federal do Pará. Rua Augusto Corrêa, 01, CEP 66075-110, Belém, Pará, Brazil
| | - Maria Cristina dos Santos-Costa
- Laboratório de Ecologia e Zoologia de Vertebrados, Instituto de Ciências Biológicas, Universidade Federal do Pará. Rua Augusto Corrêa, 01, CEP 66075-110, Belém, Pará, Brazil
| | - Lais de Nazaré Barros Barbosa
- Laboratório Interdisciplinar do Ensino de Biologia a Distância, Instituto de Ciências Biológicas, Universidade Federal do Pará. Rua Augusto Corrêa, 01, CEP 66075-110, Belém, Pará, Brazil
| | - Klyssia Stéfanni Fonseca dos Santos
- Laboratório Interdisciplinar do Ensino de Biologia a Distância, Instituto de Ciências Biológicas, Universidade Federal do Pará. Rua Augusto Corrêa, 01, CEP 66075-110, Belém, Pará, Brazil
| | - Ana Lúcia da Costa Prudente
- Laboratório de Herpetologia, Coordenação de Zoologia, Museu Paraense Emílio Goeldi, CxP 399, CEP 66040-170, Belém, Pará, Brazil
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5
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Fernandes Araujo Chaves LP, Viana DC, Chaves EP, Miglino MA, de Sousa AL. Reproductive morphophysiology of the male scorpion mud turtle (Kinosternon scorpioides Linnaeus, 1766) in captivity. Vet Med Sci 2020; 6:570-578. [PMID: 32107873 PMCID: PMC7397893 DOI: 10.1002/vms3.245] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Kinosternon scorpioides, popularly known as scorpion mud turtle (jurará in Brazil), is a fresh water species. There is little information about its reproduction and the present study aims to morphologically characterize the reproductive organs of male K.scorpioides bred in captivity in two seasons of the year. The reproductive tracts of adult animals under went macroscopic ultrastructural analysis of the lumen, as well as scanning electron and transmission microscopy. Macroscopically, the male genital organs consist of a pair of testicles, epididymis, the vas deferens and a penis. Testicles, epididymis and deferents ducts were characterized by reproductive activity during the rainy season and reproductive inactivity in the dry period. The morphometry regarding the tubular and luminal diameter and epithelial height of the testicles, epididymis and deferents ducts showed changes along the studied periods. The rainy season presented higher averages than the dry period. The penis did not show any changes during both periods. It was concluded that K. scorpioides exhibits reproductive seasonality.
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Affiliation(s)
| | - Diego C Viana
- Program in Animal Science, State University of Maranhão, University City Paulo VI, São Luís, Maranhão, Brazil
| | - Elba P Chaves
- Biotechnology, State University of Maranhão (UEMA), São Luís, Maranhão, Brazil
| | - Maria A Miglino
- Department of Surgery, Anatomy of Domestic and Wild Animals, Faculty of Veterinary Medicine and Animal Science, University of São Paulo, São Paolo, Brazil
| | - Alana L de Sousa
- Program in Animal Science, State University of Maranhão, University City Paulo VI, São Luís, Maranhão, Brazil
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6
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Chen H, Huang Y, Liu T, Haseeb A, Ahmed N, Zhang L, Bian X, Chen Q. Characteristics of seasonal spermatogenesis in the soft-shelled turtle. Anim Reprod Sci 2020; 214:106307. [PMID: 32087920 DOI: 10.1016/j.anireprosci.2020.106307] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 12/11/2019] [Accepted: 01/30/2020] [Indexed: 12/26/2022]
Abstract
Spermatogenesis in reptiles is a seasonally dependent physiological process that is not temporally associated with male mating behavior. Characteristics of seasonal spermatogenesis in reptiles, however, remain largely unknown. In this review, there is a coverage of the characteristics of soft-shelled turtle, Pelodiscus sinensis, during seasonal spermatogenesis that provides insights into spermatogenesis of testudines. The seminiferous epithelium of P. sinensis are undergoing spermatogenesis during the summer and fall, but are quiescent throughout the rest of the year; germ cells progress through spermatogenic stages in a temporal rather than a spatial pattern. While apoptotic germ cells mainly appear in the non-spermatogenic phase, these are seldom present during active spermatogenesis. It is inferred that apoptosis may be one of the reasons for germ cell loss during the resting phase of spermatogenesis. During the period when spermatogenesis is occurring, Sertoli cells become very narrow and are in contact with several round/elongated spermatids. Many residual spermatozoa can be internalized and degraded within Sertoli cells by entosis during the non-spermatogenic phase, which precedes the next reproductive cycle in P. sinensis. In the late spermatogenic phase, round-shaped mitochondria of spermatids become elongated and swollen, subsequently forming a crescent-like shape and develop into "onion-like" shaped mitochondria. As spermiogenesis progresses, the endoplasmic reticulum of spermatids is transferred into a specialized structure called the "Chrysanthemum flower center", which may be a source of autophagosomal membranes. The information provided in this review will help improve understanding of characteristics of seasonal spermatogenesis, which will hopefully promote interest in the study of reptilian species.
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Affiliation(s)
- Hong Chen
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, China
| | - Yufei Huang
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, China
| | - Tengfei Liu
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, China
| | - Abdul Haseeb
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, China
| | - Nisar Ahmed
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, China
| | - Li Zhang
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, China
| | - Xunguang Bian
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, China
| | - Qiusheng Chen
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, China.
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7
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Gradela A, Pires IC, Faria MD, Matos MHT, Costa MM, Souza RKC, Milanelo L, Franzo VS. Morphology and biometry of the reproductive organs of adult males of Trachemys scripta elegans reared in São Paulo state, Brazil. PESQUISA VETERINARIA BRASILEIRA 2019. [DOI: 10.1590/1678-5150-pvb-5848] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
ABSTRACT: Trachemys scripta elegans is an American underwater chelonian illegally marketed in Brazilian pet shops. When abandoned in nature, it compromises native species, threatening local biodiversity. However, little is known about the body development and structure of its reproductive tract. The objective of the present study was to investigate the morphology and biometry of testis, epididymis and penis, as well as the biometry of the body and secondary sexual characters in this species. Twenty-seven adult males were used aiming to contribute to preservation actions in captivity, population control, and scientific research, as well as to interspecific comparisons. Sex identification by the third claw length was effective, and the specimens presented harmonious and positive body development between mass, carapace, plastron, and height, with unimodal tendency and higher frequency of maximum carapace length at 15cm. The testes and epididymides presented biometric similarity between the antimeres and anatomical and histological structure similar to that of other species of chelonians and mammals, except for the type of epithelium. The findings suggest that there is conserved morphology between slider turtles and homology in relation to mammals. Histological similarity to the reproductive organs of other amniotes, including humans, may give rise to scientific and comparative studies, essential for the establishment of conservation strategies in reptiles.
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8
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Costa GMJ, Sousa AL, Figueiredo AFA, Lacerda SMSN, França LR. Characterization of spermatogonial cells and niche in the scorpion mud turtle (Kinosternon scorpioides). Gen Comp Endocrinol 2019; 273:163-171. [PMID: 29966660 DOI: 10.1016/j.ygcen.2018.06.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 06/21/2018] [Accepted: 06/29/2018] [Indexed: 01/15/2023]
Abstract
Undifferentiated spermatogonia (Aund) or spermatogonial stem cells (SSCs) are committed to the establishment and maintenance of spermatogenesis and fertility throughout a male's life and are located in a highly specialized microenvironment called niche that regulates their fate. Although several studies have been developed on SSCs in mammalian testis, little is known about other vertebrate classes. The present study is the first to perform a more detailed investigation on the spermatogonial cells and their niche in a reptilian species. Thus, we characterized Aund/SSCs and evaluated the existence of SSCs niche in the Kinosternon scorpioides, a freshwater turtle found from Mexico to northern and central South America. Our results showed that, in this species, Aund/SSCs exhibited a nuclear morphological pattern similar to those described for other mammalian species already investigated. However, in comparison to other spermatogonial cell types, Aund/SSCs presented the largest nuclear volume in this turtle. Similar to some mammalian and fish species investigated, both GFRA1 and CSF1 receptors were expressed in Aund/SSCs in K. scorpioides. Also, as K. scorpioides Aund/SSCs were preferentially located near blood vessels, it can be suggested that this niche characteristic is a well conserved feature during evolution. Besides being valuable for comparative reproductive biology, our findings represent an important step towards the understanding of SSCs biology and the development of valuable systems/tools for SSCs culture and cryopreservation in turtles. Moreover, we expect that the above-mentioned results will be useful for reproductive biotechnologies as well as for governmental programs aiming at reptilian species conservation.
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Affiliation(s)
- G M J Costa
- Laboratory of Cellular Biology, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - A L Sousa
- Department of Veterinary Clinics, State University of Maranhão, São Luís, MA, Brazil
| | - A F A Figueiredo
- Laboratory of Cellular Biology, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - S M S N Lacerda
- Laboratory of Cellular Biology, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - L R França
- Laboratory of Cellular Biology, Department of Morphology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil; National Institute for Amazonian Research (INPA), Manaus, AM, Brazil.
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9
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Spermatogonial stem cells differentiation and testicular lobules formation in a seasonal breeding teleost: The evidence from the heat-induced masculinization of genetically female Japanese flounder (Paralichthys olivaceus). Theriogenology 2018; 120:68-78. [DOI: 10.1016/j.theriogenology.2018.07.041] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 07/30/2018] [Accepted: 07/30/2018] [Indexed: 01/21/2023]
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10
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Pewhom A, Srakaew N. Microanatomy of the testes and testicular ducts of the butterfly lizard,
Leiolepis ocellata
Peters, 1971 (Reptilia: Squamata: Agamidae) during the active reproductive period. ACTA ZOOL-STOCKHOLM 2018. [DOI: 10.1111/azo.12270] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Akkanee Pewhom
- Department of Zoology, Faculty of Science Kasetsart University Bangkok Thailand
| | - Nopparat Srakaew
- Department of Zoology, Faculty of Science Kasetsart University Bangkok Thailand
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11
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Liu T, Wang L, Chen H, Huang Y, Yang P, Ahmed N, Wang T, Liu Y, Chen Q. Molecular and Cellular Mechanisms of Apoptosis during Dissociated Spermatogenesis. Front Physiol 2017; 8:188. [PMID: 28424629 PMCID: PMC5372796 DOI: 10.3389/fphys.2017.00188] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 03/13/2017] [Indexed: 12/12/2022] Open
Abstract
Apoptosis is a tightly controlled process by which tissues eliminate unwanted cells. Spontaneous germ cell apoptosis in testis has been broadly investigated in mammals that have an associated spermatogenesis pattern. However, the mechanism of germ cell apoptosis in seasonally breeding reptiles following a dissociated spermatogenesis has remained enigmatic. In the present study, morphological evidence has clearly confirmed the dissociated spermatogenesis pattern in Pelodiscus sinensis. TUNEL and TEM analyses presented dynamic changes and ultrastructural characteristics of apoptotic germ cells during seasonal spermatogenesis, implying that apoptosis might be one of the key mechanisms to clear degraded germ cells. Furthermore, using RNA-Seq and digital gene expression (DGE) profiling, a large number of apoptosis-related differentially expressed genes (DEGs) at different phases of spermatogenesis were identified and characterized in the testis. DGE and RT-qPCR analysis revealed that the critical anti-apoptosis genes, such as Bcl-2, BAG1, and BAG5, showed up-regulated patterns during intermediate and late spermatogenesis. Moreover, the increases in mitochondrial transmembrane potential in July and October were detected by JC-1 staining. Notably, the low protein levels of pro-apoptotic cleaved caspase-3 and CytC in cytoplasm were detected by immunohistochemistry and western blot analyses, indicating that the CytC-Caspase model might be responsible for the effects of germ cell apoptosis on seasonal spermatogenesis. These results facilitate understanding the regulatory mechanisms of apoptosis during spermatogenesis and uncovering the biological process of the dissociated spermatogenesis system in reptiles.
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Affiliation(s)
- Tengfei Liu
- Laboratory of Animal Cell Biology and Embryology, College of Veterinary Medicine, Nanjing Agricultural UniversityNanjing, China
| | - Lingling Wang
- Laboratory of Animal Cell Biology and Embryology, College of Veterinary Medicine, Nanjing Agricultural UniversityNanjing, China
| | - Hong Chen
- Laboratory of Animal Cell Biology and Embryology, College of Veterinary Medicine, Nanjing Agricultural UniversityNanjing, China
| | - Yufei Huang
- Laboratory of Animal Cell Biology and Embryology, College of Veterinary Medicine, Nanjing Agricultural UniversityNanjing, China
| | - Ping Yang
- Laboratory of Animal Cell Biology and Embryology, College of Veterinary Medicine, Nanjing Agricultural UniversityNanjing, China
| | - Nisar Ahmed
- Laboratory of Animal Cell Biology and Embryology, College of Veterinary Medicine, Nanjing Agricultural UniversityNanjing, China
| | - Taozhi Wang
- Laboratory of Animal Cell Biology and Embryology, College of Veterinary Medicine, Nanjing Agricultural UniversityNanjing, China
| | - Yi Liu
- Laboratory of Animal Cell Biology and Embryology, College of Veterinary Medicine, Nanjing Agricultural UniversityNanjing, China
| | - Qiusheng Chen
- Laboratory of Animal Cell Biology and Embryology, College of Veterinary Medicine, Nanjing Agricultural UniversityNanjing, China
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12
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Li W, Zhang P, Wu X, Zhu X, Xu H. A Novel Dynamic Expression of vasa in Male Germ Cells during Spermatogenesis in the Chinese Soft-Shell Turtle (Pelidiscus sinensis
). JOURNAL OF EXPERIMENTAL ZOOLOGY PART B-MOLECULAR AND DEVELOPMENTAL EVOLUTION 2017; 328:230-239. [DOI: 10.1002/jez.b.22728] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 12/17/2016] [Accepted: 01/07/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Wei Li
- Pearl River Fisheries Research Institute; Chinese Academic of Fisheries Sciences; Guangzhou People's Republic of China
| | - Piaoyi Zhang
- Pearl River Fisheries Research Institute; Chinese Academic of Fisheries Sciences; Guangzhou People's Republic of China
- College of Fisheries and Life Science; Shanghai Ocean University; Shanghai People's Republic of China
| | - Xuling Wu
- Pearl River Fisheries Research Institute; Chinese Academic of Fisheries Sciences; Guangzhou People's Republic of China
- College of Fisheries and Life Science; Shanghai Ocean University; Shanghai People's Republic of China
| | - Xinping Zhu
- Pearl River Fisheries Research Institute; Chinese Academic of Fisheries Sciences; Guangzhou People's Republic of China
| | - Hongyan Xu
- Pearl River Fisheries Research Institute; Chinese Academic of Fisheries Sciences; Guangzhou People's Republic of China
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Verderame M, Scudiero R, Limatola E. Exploring the Role of Estrogens in Lizard Spermatogenesis through the Study of Clomiphene and FSH Effects. Int J Endocrinol 2017; 2017:4760638. [PMID: 29463981 PMCID: PMC5804365 DOI: 10.1155/2017/4760638] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 11/23/2017] [Accepted: 12/05/2017] [Indexed: 11/17/2022] Open
Abstract
Spermatogenesis is a fascinating biological process aiming to generate haploid spermatozoa from diploid spermatogonia through a specific hormonal network between gonadotropins and steroids. Increasing evidence suggests that the primary female sex hormone estrogen plays an active role in this process. This research points out on the role of estrogen during lizard spermatogenesis by using three experimental approaches: (1) exposure to an analogue of nonsteroidal estrogen as Clomiphene citrate that acts both as estrogen agonist and antagonist; (2) exposure to the gonadotropin FSH; and (3) exposures to FSH followed by Clomiphene. Histological and immunohistochemical results demonstrate that in the lizard Podarcis sicula during the mating period, Clomiphene as well as FSH determines the breakdown of spermatogenesis and the epididymal regression, presumably through estrogens input as indirectly demonstrated by the appearance of ERα and vitellogenin in the liver. The ability of Clomiphene to restore the gonadal natural condition after FSH treatment is also demonstrated. Finally, data indicate that lizard testis and epididymis control their morphophysiology regulating the intracellular presence of ERα.
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Affiliation(s)
- Mariailaria Verderame
- Department of Biology, University Federico II, Via Mezzocannone 8, 80134 Naples, Italy
| | - Rosaria Scudiero
- Department of Biology, University Federico II, Via Mezzocannone 8, 80134 Naples, Italy
| | - Ermelinda Limatola
- Department of Biology, University Federico II, Via Mezzocannone 8, 80134 Naples, Italy
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Abstract
The spiny rat (Proechimys guyannensis) is a neotropical rodent that is used in biomedical research, particularly research related to chronic resistance to epilepsy and infectious diseases. To our knowledge, there are few reports concerning the reproductive biology of this species. Therefore, besides providing basic biometric and morphometric data, in the present study we investigated testis function and spermatogenesis in adult spiny rats. The mean testis weight and gonadosomatic index obtained were 1.63 ± 0.2 g and 1.15 ± 0.1% respectively. Based on the development of the acrosomic system, 12 stages of the seminiferous epithelium cycle were characterized. Stages VI and VII presented the highest frequencies (~17-19%), whilst stages II to V showed the lowest frequencies (~2-4%). The most advanced germ cell types labelled at 1 h or 20 days after BrdU injections were respectively preleptotene/leptotene spermatocytes at stage VII and elongated spermatids at stage III. The mean duration of one cycle was 7.5 ± 0.01 days and the entire spermatogenic process lasted 33.7 ± 0.06 days (~4.5 cycles). The seminiferous tubules (ST) occupied ~96 ± 1% of the testis parenchyma, whereas Leydig cells comprised only 1.5 ± 0.4%. The number of Sertoli cells (SC) per testis gram and the SC efficiency (spermatids/SC) were respectively 78 × 106 ± 11 × 106 and 7.9 ± 1. The daily sperm production per testis gram (spermatogenic efficiency; daily sperm production (DSP)/g/testis) was 78 × 106 ± 8 × 106. To our knowledge, this spermatogenic efficiency is among the highest found for mammals investigated to date and is probably related to the very short duration of spermatogenesis and the very high ST percentage and SC number obtained for this species.
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