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Akef MS. Reproductive and Morphological Characteristics of Hemidactylus turcicus (Squamata: Gekkonidae) and Tarentola annularis (Squamata: Phyllodactylidae) in Southern Egypt. ICHTHYOLOGY & HERPETOLOGY 2023. [DOI: 10.1643/h2021109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Yang YF, Wu JH, Lin RL, Yin SJ, Qian GY, Wang W, Park YD. Seasonal spermatogenesis, epididymal storage, and creatine kinase expression in Pelodiscus sinensis. Anim Reprod Sci 2023; 249:107198. [PMID: 36791599 DOI: 10.1016/j.anireprosci.2023.107198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 02/08/2023] [Accepted: 02/08/2023] [Indexed: 02/12/2023]
Abstract
The soft-shelled turtle, Pelodiscus sinensis, is an important economic aquaculture species. Its reproduction exhibits seasonality; however, there is a lack of systematic studies focused on sperm maturation and epididymal storage. The testes and epididymides of P. sinensis were sampled from March to December. The seasonal reproduction and maturation of the spermatozoa were examined by anatomy, hematoxylin and eosin staining, AB-PAS staining, and immunohistochemistry. Spermatogenesis exhibited obvious seasonality in P. sinensis. It was found that the spermatogenic epithelium was most active during June to September, whereas the diameter of the epididymal tubules was smallest during June to October. As key enzymes of ATP metabolism, creatine kinases were highly expressed in the epididymal tubule epithelium during the breeding season, which may be important for the regulation of sperm maturation. In addition, the epididymal tubule epithelium changed with the season in June to September, the epididymal tubule epithelium proliferated to form villous structures, and secreted a large number of glycoproteins, which may be related to the rapid maturation of sperm during the breeding season. In conclusion, this study provided insights into the spermatogenesis of P. sinensis through histological analysis and enriched our understanding of reproduction in reptiles.
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Affiliation(s)
- Yu-Fei Yang
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, Zhejiang, PR China
| | - Jia-Hao Wu
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, Zhejiang, PR China
| | - Run-Lan Lin
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, Zhejiang, PR China
| | - Shang-Jun Yin
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, Zhejiang, PR China
| | - Guo-Ying Qian
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, Zhejiang, PR China
| | - Wei Wang
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, Zhejiang, PR China.
| | - Yong-Doo Park
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, Zhejiang, PR China; Skin Diseases Research Center, Yangtze Delta Region Institute of Tsinghua University, Jiaxing 314006, Zhejiang, PR China; Zhejiang Provincial Key Laboratory of Applied Enzymology, Yangtze Delta Region Institute of Tsinghua University, Jiaxing 314006, Zhejiang, PR China.
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Pewhom A, Supapakorn T, Srakaew N. Male reproductive cycle in a population of the endemic butterfly lizard, Leiolepis ocellata Peters, 1971 (Squamata: Agamidae) from northern Thailand. BMC ZOOL 2022; 7:45. [PMID: 37170386 PMCID: PMC10127433 DOI: 10.1186/s40850-022-00145-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 07/18/2022] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Fundamental knowledge on the seasonal reproductive microanatomy and endocrinology of reptiles has been collected from several studies of various species. The present study was to determine annual changes in hormonal profiles, and detailed histomorphometric and histochemical characteristics of the entire male reproductive system of the tropical agamid lizard, Leiolepis ocellata.
Results
Male L. ocellata individuals (n = 75) collected from the territory of two provinces (Lampang and Tak) in northern Thailand exhibited annual variation in sex hormonal, histomorphometric, and histochemical characteristics of the male reproductive system. The reproductive cycle was subdivided into eight reproductive periods (early first active, first active, resting, second recrudescent, second active, regressive, quiescent, and first recrudescent), thus displaying a bimodal pattern with two actively reproductive periods. Circulating sex hormones (testosterone, estradiol, and progesterone) peaked in the first active (February) and the second active (June–July) periods. Likewise, gonadosomatic index (GSI) and histomorphometric variables of the testes and of the genital ducts (rete testis, ductuli efferentes, ductus epididymis, and ductus deferens) revealed their highest values in the first active period. Marked increase in protein and carbohydrate production was detectable in the ductuli efferentes during the active periods.
Conclusions
The male reproductive cycle of L. ocellata showed a biannual pattern of the hormonal profile, and detailed histomorphometric and histochemical characteristics of the entire reproductive system. Hence, the present study provides improved basic knowledge on the reptilian reproductive biology with comparative viewpoints to other reptiles.
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Rheubert J, Pasternak MA, Ely M, Siegel DS, Trauth SE, Gribbins KM, Sever DM. Seasonal histology and ultrastructure of the urogenital system in two sympatric lizards. J Zool (1987) 2019. [DOI: 10.1111/jzo.12748] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- J. Rheubert
- Department of Biology University of Findlay Findlay OH USA
| | | | - M. Ely
- Department of Biology University of Findlay Findlay OH USA
| | - D. S. Siegel
- Department of Biology Southeast Missouri State University Cape Girardeau MO USA
| | - S. E. Trauth
- Department of Biological Sciences Arkansas State University (Emeritus) Jonesboro AR USA
| | - K. M. Gribbins
- Department of Biology University of Indianapolis Indianapolis IN USA
| | - D. M. Sever
- Department of Biology Southeastern Louisiana University (Emeritus) Hammond LA USA
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Peña‐Herrera E, Villagrán‐SantaCruz M, Hernández‐Gallegos O, Rheubert JL, Gribbins KM, Granados‐González G. Reproductive activity in males of
Sceloporus variabilis
: Little time to rest, long time to breed. ACTA ZOOL-STOCKHOLM 2018. [DOI: 10.1111/azo.12275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Eric Peña‐Herrera
- Laboratorio de Morfofisiología de la Reproducción, Facultad de Ciencias Universidad Autónoma del Estado de México Toluca Estado de México México
| | - Maricela Villagrán‐SantaCruz
- Laboratorio de Biología Tisular y Reproductora, Departamento de Biología Comparada, Facultad de Ciencias Universidad Nacional Autónoma de México Ciudad de México México
| | - Oswaldo Hernández‐Gallegos
- Laboratorio de Herpetología, Facultad de Ciencias Universidad Autónoma del Estado de México Toluca Estado de México México
| | | | - Kevin M. Gribbins
- Department of Biology University of Indianapolis Indianapolis Indiana
| | - Gisela Granados‐González
- Laboratorio de Morfofisiología de la Reproducción, Facultad de Ciencias Universidad Autónoma del Estado de México Toluca Estado de México México
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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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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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Seasonal and continuous spermatogenesis in the viviparous lizard Sceloporus grammicus, a study of two populations in contrasting environments from the Central Mexican Plateau. ZOOL ANZ 2015. [DOI: 10.1016/j.jcz.2014.12.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Lancaster K, Trauth SE, Gribbins KM. Testicular histology and germ cell cytology during spermatogenesis in the Mississippi map turtle, Graptemys pseudogeographica kohnii, from Northeast Arkansas. SPERMATOGENESIS 2014; 4:e992654. [PMID: 26413408 PMCID: PMC4581058 DOI: 10.4161/21565562.2014.992654] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Revised: 11/19/2014] [Accepted: 11/24/2014] [Indexed: 11/19/2022]
Abstract
The testicular histology and cytology of spermatogenesis in Graptemys pseudogeographica kohnii were examined using specimens collected between July 1996 and May 2004 from counties in northeastern Arkansas. A histological examination of the testes and germ cell cytology indicates a postnuptial testicular cycle of spermatogenesis and a major fall spermiation event. The majority of the germ cell populations in May and June specimens are represented by resting spermatogonia, type A spermatogonia, type B spermatogonia, pre-leptotene spermatocytes, and numerous Sertoli cell nuclei near the basement membrane. The start of proliferation is evident as spermatogonia in metaphase are present near the basal lamina and many of these germ cells have entered meiosis in June seminiferous tubules. Major spermatogenic events occur in the June and July specimens and result in an increased height of the seminiferous epithelium and increased diameter of the seminiferous tubules. The germ cell population during this time is represented by spermatogonia (type A, B, and resting), hypertrophic cells, large populations of early primary spermatocytes, and early round spermatids. By September, the major germ cell population has progressed past meiosis with abundant round and early elongating spermatids dominating the seminiferous epithelium. October seminiferous epithelia are marked by a decreas in height and mature spermatozoa fill the luminal space. Round and elongating spermatids constitute the largest portion of the germ cell population. Following the spermiation event, the testes enter a period of quiescence that lasts till the next spermatogenic cycle, which begins in the subsequent spring. Based on the cytological development of the seminiferous tubules revealed by our study, Graptemys pseudogeographica kohnii demonstrates a temporal germ cell development strategy similar to other temperate reptiles. A single major generation of germ cells progresses through spermatogenesis each year resulting in a single spermiation event with sperm stored within the epididymis until the next spring mating season.
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Affiliation(s)
- Kelsey Lancaster
- Department of Biological Sciences; Arkansas State University; Jonesboro, AR USA
| | - Stanley E Trauth
- Department of Biological Sciences; Arkansas State University; Jonesboro, AR USA
| | - Kevin M Gribbins
- Department of Biology; University of Indianapolis; Indianapolis, IN USA
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Reproductive Biology ofSceloporus consobrinus(Phrynosomatidae): Male Germ Cell Development and Reproductive Cycle Comparisons within Spiny Lizards. J HERPETOL 2014. [DOI: 10.1670/12-156] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Granados-González G, Rheubert JL, Villagrán-SantaCruz M, González-Herrera ME, Dávila-Cedillo JV, Gribbins KM, Hernández-Gallegos O. Male reproductive cycle inAspidoscelis costata costata(Squamata: Teiidae) from Tonatico, Estado de México, México. ACTA ZOOL-STOCKHOLM 2013. [DOI: 10.1111/azo.12057] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gisela Granados-González
- Facultad de Ciencias; Universidad Autónoma del Estado de México; Instituto Literario 100 Toluca Centro C.P. 50000 México
| | - Justin L. Rheubert
- Department of Biology; Saint Louis University; 3507 Laclede Ave St. Louis MO 63103 USA
| | - Maricela Villagrán-SantaCruz
- Laboratorio de Biología de la Reproducción Animal; Departamento de Biología Comparada; Facultad de Ciencias; Universidad Nacional Autónoma de México; Distrito Federal C.P. 04510 México
| | - María E. González-Herrera
- Facultad de Ciencias; Universidad Autónoma del Estado de México; Instituto Literario 100 Toluca Centro C.P. 50000 México
| | - Jessica V. Dávila-Cedillo
- Facultad de Ciencias; Universidad Autónoma del Estado de México; Instituto Literario 100 Toluca Centro C.P. 50000 México
| | - Kevin M. Gribbins
- Department of Biology; Wittenberg University; P.O. Box 720 Springfield OH 45501 USA
| | - Oswaldo Hernández-Gallegos
- Facultad de Ciencias; Universidad Autónoma del Estado de México; Instituto Literario 100 Toluca Centro C.P. 50000 México
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Hernández-Franyutti A, Uribe MC. Seasonal spermatogenic cycle and morphology of germ cells in the viviparous lizardMabuya brachypoda(Squamata, Scincidae). J Morphol 2012; 273:1199-213. [DOI: 10.1002/jmor.20050] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2012] [Revised: 04/04/2012] [Accepted: 04/13/2012] [Indexed: 11/09/2022]
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Gribbins K, Rheubert J. The Ophidian Testis, Spermatogenesis and Mature Spermatozoa. ACTA ACUST UNITED AC 2011. [DOI: 10.1201/b10879-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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