1
|
Bueno LM, Soares EM, Ferraz JF, Santiago CS, Comelis-Martins MT, Taboga SR, Morielle-Versute E, Beguelini MR. Testicular regression and recrudescence in the bat Eptesicus furinalis: Morpho-physiological variations and hormonal signaling pathways. Anat Rec (Hoboken) 2024; 307:2875-2890. [PMID: 38095144 DOI: 10.1002/ar.25369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Revised: 11/29/2023] [Accepted: 11/30/2023] [Indexed: 07/04/2024]
Abstract
Males of the bat Eptesicus furinalis show at least one process of testicular regression, in which the testes regress and temporarily interrupt the production of sperm, during its annual reproductive cycle. As the process of spermatogenesis is under hormonal control, mainly of pituitary and androgen hormones, our aim was to analyze the morphological variations and the hormonal control of the testes of E. furinalis during the four phases of its reproductive cycle. Testes of 18 adult males, divided into four sample groups (active, regressing, regressed, and recrudescence phases), were submitted to morphological, morphometric, and immunohistochemical analyzes. The results demonstrate that the processes of testicular regression and recrudescence of E. furinalis are under the control of pituitary, androgen and estrogen hormones. The regulation is exerted mainly through the activation and cross signaling of AR and FSHR in Sertoli cells and of LHR in Leydig cells. The testicular regression appears to be activated by an inhibition/reduction of AR expression in Sertoli cells, which inhibits the proliferation and differentiation of new spermatogonia and causes the deactivation of spermatogenesis. Conversely, the testicular recrudescence occurs by the increasing of the expression of LHR in Leydig cells, and AR and FSHR in Sertoli cells, which reactivates the testicular production of androgens and estrogens, the proliferation of spermatogonia and restarts the spermatogenesis.
Collapse
Affiliation(s)
- Larissa Mayumi Bueno
- Department of Zoology and Botany, UNESP-Universidade Estadual Paulista, São José do Rio Preto, Brazil
| | - Emília M Soares
- Center of Biological and Health Science, UFOB-Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil
| | - Juliana F Ferraz
- Center of Biological and Health Science, UFOB-Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil
| | - Cornélio S Santiago
- Center of Biological and Health Science, UFOB-Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil
| | | | | | - Eliana Morielle-Versute
- Department of Zoology and Botany, UNESP-Universidade Estadual Paulista, São José do Rio Preto, Brazil
| | - Mateus Rodrigues Beguelini
- Center of Biological and Health Science, UFOB-Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil
| |
Collapse
|
2
|
Fernini M, Menad R, Belhocine M, Lakabi L, Smaï S, Gernigon-Spychalowicz T, Khammar F, Bonnet X, Exbrayat JM, Moudilou E. Seasonal variations of testis anatomy and of G-coupled oestrogen receptor 1 expression in Gerbillus gerbillus. Anat Histol Embryol 2023; 52:1016-1028. [PMID: 37661709 DOI: 10.1111/ahe.12962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 07/31/2023] [Accepted: 08/20/2023] [Indexed: 09/05/2023]
Abstract
The gerbil, Gerbillus gerbillus, a nocturnal desert rodent of northern Africa, exhibits a seasonal reproductive cycle with marked anatomical and behavioural shifts between breeding season and resting season. The aim of this study is to investigate key elements involved in these seasonal changes, specifically in males: the histology of the testis as well as the expression of the G-protein-coupled oestrogen receptor 1 (GPER1) in the testis. During the breeding season, the seminiferous tubules were full of spermatozoa, and their epithelium contained germinal cells embedded in Sertoli cells. Amidst tubules, well-developed Leydig cells were observed around blood vessels, with peritubular myoid cells providing structural and dynamic support to the tubules. GPER1 was largely expressed throughout the testis. Notably, Leydig cells, spermatogonia and spermatocytes showed strong immunohistochemical signals. Sertoli cells, spermatozoa and peritubular myoid cells were moderately stained. During the resting season, spermatogenesis was blocked at the spermatocyte stage, spermatids and spermatozoa were absent and the interstitial space was reduced. The weight of the testis decreased significantly. At this stage, GPER1 was found in Leydig cells, spermatocytes and peritubular myoid cells. Sertoli cells and spermatogonia were not marked. Overall, the testis of the gerbil, Gerbillus gerbillus, has undergone noticeable histological, cellular and weight changes between seasons. In addition, the seasonal expression pattern of GPER1, with pronounced differences between resting season and breeding season, indicates that this receptor is involved in the regulation of the reproductive cycle.
Collapse
Affiliation(s)
- Meriem Fernini
- Faculty of Natural Sciences and Life, Laboratory of Sciences and Techniques of Animal Production (LSTPA), Abdelhamid Ibn Badis University, Mostaganem, Algeria
| | - Rafik Menad
- Faculty of Biological Sciences, Laboratory of Research on Arid Areas, Small Vertebrates Reproduction, Houari Boumediene University of Sciences and Technology, Algiers, Algeria
- Department of Natural and Life Sciences, Faculty of Sciences, Laboratory of Valorization and Bioengineering of Natural Resources, University of Algiers, Algiers, Algeria
| | - Mansouria Belhocine
- Faculty of Natural Sciences and Life, Laboratory of Sciences and Techniques of Animal Production (LSTPA), Abdelhamid Ibn Badis University, Mostaganem, Algeria
| | - Lynda Lakabi
- Natural Resources Laboratory, University Mouloud Mammeri, Tizi-Ouzou, Algeria
| | - Souaâd Smaï
- Faculty of Biological Sciences, Laboratory of Research on Arid Areas, Small Vertebrates Reproduction, Houari Boumediene University of Sciences and Technology, Algiers, Algeria
| | - Thérèse Gernigon-Spychalowicz
- Faculty of Biological Sciences, Laboratory of Research on Arid Areas, Small Vertebrates Reproduction, Houari Boumediene University of Sciences and Technology, Algiers, Algeria
| | - Farida Khammar
- Faculty of Biological Sciences, Laboratory of Research on Arid Areas, Mammal Ecophysiology, Houari Boumediene University of Sciences and Technology, El Alia, Algiers, Algeria
| | | | - Jean-Marie Exbrayat
- UMRS 449, Laboratory of General Biology, Catholic University of Lyon, Reproduction and Comparative Development/EPHE, University of Lyon, Lyon, France
| | - Elara Moudilou
- UMRS 449, Laboratory of General Biology, Catholic University of Lyon, Reproduction and Comparative Development/EPHE, University of Lyon, Lyon, France
| |
Collapse
|
3
|
Pimentel PB, Santigo CS, Ferraz JF, Morielle-Versute E, Taboga SR, Souza CC, Beguelini MR. Morphophysiology of the male reproductive accessory glands of the bat Pteronotus gymnonotus (Mormoopidae: Chiroptera). Tissue Cell 2023; 80:101991. [PMID: 36462383 DOI: 10.1016/j.tice.2022.101991] [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: 09/09/2022] [Revised: 11/23/2022] [Accepted: 11/24/2022] [Indexed: 11/27/2022]
Abstract
Mormoopidae is an exclusive Neotropical family of bats, distributed from southern Mexico to northeastern Brazil. Possibly due to its endemic distribution and very low occurrence (rarity), descriptions of their reproductive accessory glands (RAGs) are still lacking. Thus, this study aims to characterize the male RAGs of Pteronotus gymnonotus (Mormoopidae: Chiroptera). Results demonstrate that the RAGs of P. gymnonotus is composed of a prostatic complex, comprising two regions (ventral and dorsal prostates); urethral (Littre) glands, a pair of bulbourethral and ampullary glands, with the absence of seminal vesicles. The ventral prostate has an atypical epithelium, due to its holocrine secretion; which contains numerous PAS-positive globular vesicles. The dorsal prostate has a cubic-to-columnar pseudostratified epithelium, containing fluid PAS-negative secretion. The ampullary glands present cubic-to-columnar pseudostratified epithelium, with secretion varying from granular and PAS-negative to fluid and PAS-positive. Urethral glands are dispersed in the submucosa of the urethra, while the bulbourethral glands are located in the penile root. Both glands have cubic-to-columnar pseudostratified epithelium with PAS-positive globular secretion. In conclusion, we propose that the RAGs of P. gymnonotus possibly evolved from a common emballonurid ancestor, shared with the families Phyllostomidae and Noctilionidae, but with the development of an exclusive apomorphy, the ampullary glands.
Collapse
Affiliation(s)
- Pollyana B Pimentel
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil.
| | - Cornélio S Santigo
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil.
| | - Juliana F Ferraz
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil.
| | - Eliana Morielle-Versute
- Department of Zoology and Botany, UNESP - Univ. Estadual Paulista, São José do Rio Preto, São Paulo, Brazil.
| | - Sebastião R Taboga
- Department of Biology, UNESP - Univ. Estadual Paulista, São José do Rio Preto, São Paulo, Brazil.
| | - Carolina C Souza
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil.
| | - Mateus R Beguelini
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil.
| |
Collapse
|
4
|
Pimentel PB, Ferraz JF, Santigo CS, Soares EM, Morielle-Versute E, Taboga SR, Souza CC, Beguelini MR. Comparative analysis of male reproductive accessory glands in bats Histiotus velatus (Vespertilionidae), Molossus rufus (Molossidae), and Peropteryx leucoptera (Emballonuridae). Anat Rec (Hoboken) 2022. [PMID: 36579698 DOI: 10.1002/ar.25145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 11/22/2022] [Accepted: 12/10/2022] [Indexed: 12/30/2022]
Abstract
Despite the high number of species and wide geographic dispersion, reproductive accessory glands (RAGs) of bats have traditionally received little attention in the literature, with some species not even having a basic description of their composition and structure. Thus, this study aimed to analyze and compare the composition, anatomy, and histology of male RAGs of bat species belonging to three of the largest (cosmopolitan) bat families: Vespertilionidae (Histiotus velatus), Molossidae (Molossus rufus), and Emballonuridae (Peropteryx leucoptera), in order to understand the variations in the bat RAGs. The results showed that the RAGs of H. velatus, M. rufus, and P. leucoptera are composed of an intra-abdominal prostatic complex, associated with the urethra, urethral glands, and a pair of inguinal bulbourethral glands; without ampullary glands or seminal vesicles. The prostatic complex can be composed of two (M. rufus and P. leucoptera) or three (H. velatus) prostatic regions, and can be compact (P. leucoptera), semi-lobed (M. rufus), or multilobed (H. velatus). Each prostatic region has unique and distinct characteristics, with the ventral region presenting a holocrine nature, exclusive to bats; while the dorsal and/or dorsolateral regions have similar characteristics to the ventral prostate of rats and to the human peripheral zone.
Collapse
Affiliation(s)
- Pollyana B Pimentel
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil
| | - Juliana Filgueira Ferraz
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil
| | - Cornélio Souza Santigo
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil
| | - Emília Miguel Soares
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil
| | - Eliana Morielle-Versute
- Department of Zoology and Botany, UNESP - University Estadual Paulista, São José do Rio Preto, São Paulo, Brazil
| | - Sebastião R Taboga
- Department of Biology, UNESP - University Estadual Paulista, São José do Rio Preto, São Paulo, Brazil
| | - Carolina C Souza
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil
| | - Mateus R Beguelini
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil
| |
Collapse
|
5
|
Albernaz ESS, Santiago CS, Guerra LHA, Santos FCA, Góes RM, Morielle-Versute E, Taboga SR, Souza CC, Beguelini MR. The prostate of the bat Artibeus lituratus: Seasonal variations, abiotic regulation, and hormonal control. J Morphol 2021; 282:1188-1207. [PMID: 33913176 DOI: 10.1002/jmor.21362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 04/21/2021] [Accepted: 04/25/2021] [Indexed: 11/12/2022]
Abstract
The prostate is an important gland that contributes to the male reproductive process, producing secretions that are essential for maintaining ideal conditions for the survival of sperm. Studies indicate a wide variation in the occurrence, morphology, and physiology of this gland in mammals, especially in bats, with this variation being related not only to the number of regions and their degree of compaction/lobulation but also to fluctuations in their functioning throughout the year. Thus, the aim of this study was to evaluate the annual morphological and physiological variations of the male prostate of Artibeus lituratus and analyze their responses to annual abiotic variations and hormonal control. Sixty sexually adult males of A. lituratus were analyzed in this study, with five specimens collected monthly. Blood samples were submitted to serum hormone measurements and the prostates were morphologically, morphometrically, and immunohistochemically analyzed. The results indicated that the two prostatic regions (ventral and dorsal) of A. lituratus had different morphology, as well as different physiology and regulation. Annual fluctuations in abiotic factors seemed to influence the dorsal region more than the ventral region. Conversely, variations on testicular factors, such as testosterone and estradiol, influenced the ventral region more than the dorsal region. Despite these differences, both prostatic regions were strongly synchronized to the main reproductive peak of the species in September. The holocrine pattern of the ventral prostate was not directly affected by abiotic factors or by factors released by the testes.
Collapse
Affiliation(s)
- Edna S S Albernaz
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil
| | - Cornélio S Santiago
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil
| | - Luiz H A Guerra
- Department of Biology, UNESP - Univ. Estadual Paulista, São José do Rio Preto, São Paulo, Brazil
| | - Fernanda C A Santos
- Department of Histology and Embryology, UFG - Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - Rejane M Góes
- Department of Biology, UNESP - Univ. Estadual Paulista, São José do Rio Preto, São Paulo, Brazil
| | - Eliana Morielle-Versute
- Department of Zoology and Botany, UNESP - Univ. Estadual Paulista, São José do Rio Preto, São Paulo, Brazil
| | - Sebastião R Taboga
- Department of Biology, UNESP - Univ. Estadual Paulista, São José do Rio Preto, São Paulo, Brazil
| | - Carolina C Souza
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil
| | - Mateus R Beguelini
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil
| |
Collapse
|
6
|
Soares EM, Ferraz JF, Oliveira RS, Dias LIS, Santiago CS, Pletsch AA, Morielle-Versute E, Taboga SR, Souza CC, Beguelini MR. The process of testicular regression also impacts the physiology of the epididymis of the bat Molossus molossus, although with a delay in epididymal response due to sperm storage. Acta Histochem 2021; 123:151697. [PMID: 33662820 DOI: 10.1016/j.acthis.2021.151697] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 02/23/2021] [Accepted: 02/23/2021] [Indexed: 01/13/2023]
Abstract
Responsible for post-testicular maturation, concentration, protection and sperm storage, the epididymis is an organ that can be easily subdivided into three segments: caput, corpus and cauda. Each epididymal region displays different morphology and functions within the sperm maturation process. Despite the great importance of this organ, studies on its morphology and hormonal control in bats remain scarce. Thus, the aim of this study was to morphologically analyze the epididymis of the bat Molossus molossus (Chiroptera: Molossidae), in order to evaluate its morphological and morphometric variations, as well as some aspects of its hormonal control during the annual reproductive cycle. For this purpose, 60 sexually adult males were used in this study, comprising five specimens collected monthly for one year to form 12 sample groups. The epididymis was subjected to morphological, morphometric and immunohistochemical analyses. The results demonstrated that the processes of total testicular regression and posterior recrudescence suffered by M. molossus also impacts the physiology of the epididymis, however, a delay in the epididymal response is seen due to the storage of sperm. Similar to other mammals, the epididymis of M. molossus has a large predominance of principal and basal cells. The epididymal seasonal variations appear to be directly correlated to rainfall and photoperiod, but not to temperature. Meanwhile, epididymal physiology appears to be regulated, at least partially, by the expression of the androgen receptor in epithelial cells, which has agonist effects on cell proliferation.
Collapse
Affiliation(s)
- Emília M Soares
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil.
| | - Juliana F Ferraz
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil.
| | - Rodrigo S Oliveira
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil.
| | - Luíza I S Dias
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil.
| | - Cornélio S Santiago
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil.
| | - Andrea A Pletsch
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil.
| | - Eliana Morielle-Versute
- Department of Zoology and Botany, UNESP - Univ. Estadual Paulista, São José do Rio Preto, São Paulo, Brazil.
| | - Sebastião R Taboga
- Department of Biology, UNESP - Univ. Estadual Paulista, São José do Rio Preto, São Paulo, Brazil.
| | - Carolina C Souza
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil.
| | - Mateus R Beguelini
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia, Barreiras, Bahia, Brazil.
| |
Collapse
|
7
|
Ocampo‐González P, López‐Wilchis R, Espinoza‐Medinilla EE, Rioja‐Paradela TM. A review of the breeding biology of Chiroptera. Mamm Rev 2021. [DOI: 10.1111/mam.12236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Paola Ocampo‐González
- Programa de Doctorado en Ciencias en Biodiversiad y Conservación de Ecosistemas Tropicales Instituto de Ciencias Biológicas Universidad de Ciencias y Artes de Chiapas Libramiento Norte Poniente 1150, Colonia Lajas Maciel Tuxtla Gutiérrez Chiapas29039México
| | - Ricardo López‐Wilchis
- Departamento de Biología Universidad Autónoma Metropolitana‐Iztapalapa Av. San Rafael Atlixco 186, Col. Vicentina Ciudad de México09340México
| | - Eduardo E. Espinoza‐Medinilla
- Instituto de Ciencias Biológicas Universidad de Ciencias y Artes de Chiapas Libramiento Norte Poniente 1150, Colonia Lajas Maciel Tuxtla Gutiérrez Chiapas29039México
| | - Tamara M. Rioja‐Paradela
- Posgrado en Ciencias en Desarrollo Sustentable y Gestión de Riesgos Universidad de Ciencias y Artes de Chiapas Libramiento Norte Poniente 1150, Colonia Lajas Maciel Tuxtla Gutiérrez Chiapas29039México
| |
Collapse
|
8
|
Silva SFM, Oliveira LCA, Dias FCR, Cordero-Schmidt E, Vargas-Mena JC, Silva IGM, Báo SN, Luna JLS, Lima RRM, Júnior RFA, Farias NBS, Moura CEB, Matta SLP, Morais DB. Seasonal evaluation of spermatogenesis of the hematophagous bat Desmodus rotundus in the Caatinga biome. PLoS One 2020; 15:e0242932. [PMID: 33270698 PMCID: PMC7714151 DOI: 10.1371/journal.pone.0242932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 11/12/2020] [Indexed: 11/29/2022] Open
Abstract
This study was aimed to characterize the spermatogenic process and its seasonal variation in Desmodus rotundus, in the Caatinga biome, a water-limited ecosystem, with marked water restriction during most of the year. Collections of adult animals were performed during the dry and rainy seasons, and after euthanasia, their testes were processed histologically to perform morphological, morphometric, ultrastructural and immunohistochemical analyzes. The percentage of seminiferous epithelium, number of Leydig cells per gram of testis, and population of Sertoli cells and A-type spermatogonia presented by D. rotundus were significantly higher in the rainy season, while the percentage of lumen, mitotic index, support capacity performed by Sertoli cells, and overall yield of spermatogenesis were higher in the dry season. The ultrastructure of spermatogenesis was similar to that described in other mammals, and the immunohistochemical analysis revealed activity of the aromatase enzyme in Sertoli cells, Leydig cells, spermatocytes and spermatids, as well as the presence of androgen receptors in Sertoli cells and Leydig cells. FGF2 activity was detected in primary spermatocytes in zygotene and pachytene, as well as secondary spermatocytes and rounded and elongated spermatids, while the BCL-2 protein was expressed in primary spermatocytes in zygotene and pachytene, secondary spermatocytes, and rounded spermatids. The activity of these molecules was similar in both seasons, and associated with the morphometric findings, indicates maintenance in the integrity of the seminiferous epithelium throughout the year. The seasonal study of D. rotundus spermatogenesis indicates a continuous spermatogenesis pattern and suggests a greater production of spermatozoa in the rainy season in the Caatinga biome.
Collapse
Affiliation(s)
- Soraia F. M. Silva
- Department of Morphology, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Laryssa C. A. Oliveira
- Department of Morphology, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Fernanda C. R. Dias
- Department of General Biology, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil
| | - Eugenia Cordero-Schmidt
- Department of Ecology, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Juan C. Vargas-Mena
- Department of Ecology, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Ingrid G. M. Silva
- Department of Cell Biology, University of Brasília, Brasília, Distrito Federal, Brazil
| | - Sônia N. Báo
- Department of Cell Biology, University of Brasília, Brasília, Distrito Federal, Brazil
| | - João L. S. Luna
- Department of Morphology, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Ruthnaldo R. M. Lima
- Department of Morphology, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Raimundo F. A. Júnior
- Department of Morphology, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Naisandra B. S. Farias
- Department of Morphology, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Carlos E. B. Moura
- Department of Animal Sciences, Federal Rural University of the Semi-Arid Region, Mossoró, Rio Grande do Norte, Brazil
| | - Sérgio L. P. Matta
- Department of General Biology, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil
| | - Danielle B. Morais
- Department of Morphology, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| |
Collapse
|
9
|
Annual reproductive cycle of males of the bat Molossus molossus: Seasonal bimodal polyestry, testicular regression, and some aspects of the hormonal control. Theriogenology 2020; 158:297-308. [DOI: 10.1016/j.theriogenology.2020.09.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 09/14/2020] [Accepted: 09/17/2020] [Indexed: 11/21/2022]
|
10
|
Testicular characterization and spermatogenesis of the hematophagous bat Diphylla ecaudata. PLoS One 2019; 14:e0226558. [PMID: 31835274 PMCID: PMC6910855 DOI: 10.1371/journal.pone.0226558] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Accepted: 11/28/2019] [Indexed: 11/19/2022] Open
Abstract
Diphylla ecaudata is a hematophagous bat endemic of South America, with food preference for bird blood. Given the lack of information about the reproductive activity of this species, this study aimed to describe the testicular morphology and histomorphometry of D. ecaudata in order to understand its reproductive biology, specially spermatogenesis. The animals were collected in Lajes city, Rio Grande do Norte, Brazil. Following euthanasia, the testes were histologically processed for morphological, morphometric, ultrastructural and immunohistochemical analyses. Their average body weight was 24.64g, with a gonadosomatic index of 0.49%, tubulesomatic index of 0.47%, and a total of 32.20m of seminiferous tubules per gram of testis. The pre-meiotic, meiotic, and post-meiotic phases accounted for 56.20%, 9.30%, and 34.50% of the seminiferous epithelium cycle, respectively. The ultrastructure of spermiogenesis was similar to that described in other mammals and the perforatorium was not observed in the sperm. Androgen receptors were detected in Sertoli cell nuclei and Leydig cell cytoplasm, while aromatase enzyme was detected only in Sertoli cell nuclei. FGF2 and BCL-2 activities were detected in the cytoplasm of zygotene and pachytene primary spermatocytes, as well as round and elongated spermatids. D. ecaudata showed testicular pattern similar to other mammals and characteristics common to other bat species. This species stood out for its high efficiency of Sertoli cells, which presented high capacity to support germ cells, besides the highest sperm production rates among those already recorded. This study is the first step towards the knowledge of D. ecaudata reproduction and the first description of its spermatogenesis.
Collapse
|
11
|
Effect of Wuzi Yanzong on Reproductive Hormones and TGF-β1/Smads Signal Pathway in Rats with Oligoasthenozoospermia. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2019; 2019:7628125. [PMID: 31118967 PMCID: PMC6500641 DOI: 10.1155/2019/7628125] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 02/28/2019] [Accepted: 04/01/2019] [Indexed: 11/22/2022]
Abstract
Introduction Wuzi Yanzong (WZYZ) formula, a famous traditional Chinese medicinal prescription, has been widely used to treat kidney essence insufficiency-induced oligoasthenozoospermia in ancient and modern clinical practice. Previous studies have demonstrated that WZYZ formula exhibits significantly therapeutic activity. The aim of this study was to evaluate the effect of WZYZ formula on the reproductive hormone levels and the TGF-β1/Smads signal pathway in the testis, to explore the underlying mechanisms of WZYZ formula to improve spermatogenic function of testis in rats with oligoasthenozoospermia. Materials and Methods In order to control the quality of the drug, the main components of the WZYZ formula were analyzed by HPLC. A rat model of oligoasthenozoospermia was established, by daily administration of tripterygium glucosides for 4 weeks, and treated with 1.62g/kg of WZYZ formula. The testes were histopathologically examined and serum levels of gonadotropin release hormone (GnRH), estradiol (E2), follicle-stimulating hormone (FSH), testosterone (T), and luteinizing hormone (LH) were measured by ELISA. TGf-β1, Smad2, and Smad4 mRNA and protein levels in the testis were evaluated by immunohistochemistry (IHC), quantitative real-time RT-PCR (qRT-PCR), and Western blotting (WB). Result Oral administration of WZYZ formula restored testicular structure and significantly increased the histology score in the oligoasthenozoospermic rats. In addition, WZYZ also significantly increased the serum levels of GnRH, LH, E2, and T and decreased that of FSH. Meanwhile, TGf-β1, Smad2, and Sma4 expression levels were significantly decreased. Conclusions WZYZ alleviates oligoasthenozoospermia by restoring the reproductive hormones and targeting the TGf-β1/Smads pathway.
Collapse
|
12
|
Catalano-Iniesta L, Sánchez-Robledo V, Iglesias-Osma MC, García-Barrado MJ, Carretero-Hernández M, Blanco EJ, Vicente-García T, Burks DJ, Carretero J. Sequential testicular atrophy involves changes in cellular proliferation and apoptosis associated with variations in aromatase P450 expression levels in Irs-2-deficient mice. J Anat 2018; 234:227-243. [PMID: 30474117 DOI: 10.1111/joa.12917] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/30/2018] [Indexed: 01/26/2023] Open
Abstract
Insulin receptor substrate 2 (Irs-2) is an intracellular protein susceptible to phosphorylation after activation of the insulin receptor. Its suppression affects testis development and its absence induces peripheral resistance to insulin. The aim of this study was to identify changes induced by the deletion of Irs-2 in the testicular structure and by the altered expression of cytochrome P450 aromatase, a protein necessary for the development and maturation of germ cells. Adult knockout (KO) mice (Irs-2-/- , 6 and 12 weeks old) and age-matched wild-type (WT) mice were used in this study. Immunohistochemistry and Western blot analyses were performed to study proliferation (PCNA), apoptosis (active caspase-3) and P450 aromatase expression in testicular histological sections. Deletion of Irs-2 decreased the number of epithelial cells in the seminiferous tubule and rete testis. Aberrant cells were frequently detected in the epithelia of Irs-2-/- mice, accompanied by variations in spermatogonia, which were shown to exhibit small hyperchromatic nuclei as well as polynuclear and anuclear structures. The amount of cell proliferation was significantly lower in Irs-2-/- mice than in WT mice, whereas apoptotic processes were more common in Irs-2-/- mice. Aromatase P450 reactivity was higher in 6-week-old KO mice than in WT mice of the same age and was even higher at 12 weeks. Our results suggest that Irs-2 is a key element in spermatogenesis because silencing Irs-2 induces the sequential development of testicular atrophy. The effects are observed mainly in germ cells present in the seminiferous tubule, which may be due to changes in cytochrome P450 aromatase expression.
Collapse
Affiliation(s)
- Leonardo Catalano-Iniesta
- Faculty of Medicine, Department of Human Anatomy and Histology, Laboratory of Neuroendocrinology of the Institute of Neurosciences of Castilla y León (INCyL), Laboratory of Neuroendocrinology and Obesity of the Institute of Biomedical Research of Salamanca (IBSAL), University of Salamanca, Salamanca, Spain
| | - Virginia Sánchez-Robledo
- Faculty of Medicine, Department of Physiology and Pharmacology, Laboratory of Neuroendocrinology of the Institute of Neurosciences of Castilla y León (INCyL), Laboratory of Neuroendocrinology and Obesity of the Institute of Biomedical Research of Salamanca (IBSAL), University of Salamanca, Salamanca, Spain
| | - Maria Carmen Iglesias-Osma
- Faculty of Medicine, Department of Physiology and Pharmacology, Laboratory of Neuroendocrinology of the Institute of Neurosciences of Castilla y León (INCyL), Laboratory of Neuroendocrinology and Obesity of the Institute of Biomedical Research of Salamanca (IBSAL), University of Salamanca, Salamanca, Spain
| | - Maria José García-Barrado
- Faculty of Medicine, Department of Physiology and Pharmacology, Laboratory of Neuroendocrinology of the Institute of Neurosciences of Castilla y León (INCyL), Laboratory of Neuroendocrinology and Obesity of the Institute of Biomedical Research of Salamanca (IBSAL), University of Salamanca, Salamanca, Spain
| | - Marta Carretero-Hernández
- Faculty of Medicine, Department of Human Anatomy and Histology, Laboratory of Neuroendocrinology of the Institute of Neurosciences of Castilla y León (INCyL), Laboratory of Neuroendocrinology and Obesity of the Institute of Biomedical Research of Salamanca (IBSAL), University of Salamanca, Salamanca, Spain
| | - Enrique J Blanco
- Faculty of Medicine, Department of Human Anatomy and Histology, Laboratory of Neuroendocrinology of the Institute of Neurosciences of Castilla y León (INCyL), Laboratory of Neuroendocrinology and Obesity of the Institute of Biomedical Research of Salamanca (IBSAL), University of Salamanca, Salamanca, Spain
| | - Teresa Vicente-García
- Faculty of Medicine, Department of Human Anatomy and Histology, Laboratory of Neuroendocrinology of the Institute of Neurosciences of Castilla y León (INCyL), Laboratory of Neuroendocrinology and Obesity of the Institute of Biomedical Research of Salamanca (IBSAL), University of Salamanca, Salamanca, Spain
| | - Deborah Jane Burks
- Laboratory of Molecular Neuroendocrinology, Centro de Investigación Príncipe Felipe, Valencia, Spain
| | - José Carretero
- Faculty of Medicine, Department of Human Anatomy and Histology, Laboratory of Neuroendocrinology of the Institute of Neurosciences of Castilla y León (INCyL), Laboratory of Neuroendocrinology and Obesity of the Institute of Biomedical Research of Salamanca (IBSAL), University of Salamanca, Salamanca, Spain
| |
Collapse
|
13
|
Santos RTS, Pires LRM, Albernaz ESS, Andrade CS, Santiago CS, Morielle-Versute E, Taboga SR, Beguelini MR. Morphological analysis of the male reproductive accessory glands of the batArtibeus lituratus(Phyllostomidae: Chiroptera). J Morphol 2017; 279:228-241. [DOI: 10.1002/jmor.20767] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 10/05/2017] [Accepted: 10/10/2017] [Indexed: 12/16/2022]
Affiliation(s)
- Renata T. S. Santos
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia; Barreiras Bahia Brazil
| | - Laís R. M. Pires
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia; Barreiras Bahia Brazil
| | - Edna S. S. Albernaz
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia; Barreiras Bahia Brazil
| | - Cleber S. Andrade
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia; Barreiras Bahia Brazil
| | - Cornélio S. Santiago
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia; Barreiras Bahia Brazil
| | - Eliana Morielle-Versute
- Department of Zoology and Botany; UNESP - Univ. Estadual Paulista; São José do Rio Preto São Paulo Brazil
| | - Sebastião R. Taboga
- Department of Biology; UNESP - Univ. Estadual Paulista; São José do Rio Preto São Paulo Brazil
| | - Mateus R. Beguelini
- Center of Biological and Health Science, UFOB - Universidade Federal do Oeste da Bahia; Barreiras Bahia Brazil
| |
Collapse
|
14
|
Structural, ultrastructural and immunohistochemical evidence of testosterone effects and its ablation on the bulbourethal gland of the Artibeus planirostris bat (Chiroptera, Mammalia). Tissue Cell 2017; 49:470-482. [DOI: 10.1016/j.tice.2017.06.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 05/18/2017] [Accepted: 06/04/2017] [Indexed: 11/24/2022]
|
15
|
Cooke PS, Nanjappa MK, Ko C, Prins GS, Hess RA. Estrogens in Male Physiology. Physiol Rev 2017; 97:995-1043. [PMID: 28539434 PMCID: PMC6151497 DOI: 10.1152/physrev.00018.2016] [Citation(s) in RCA: 263] [Impact Index Per Article: 37.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 01/06/2017] [Accepted: 01/17/2017] [Indexed: 02/06/2023] Open
Abstract
Estrogens have historically been associated with female reproduction, but work over the last two decades established that estrogens and their main nuclear receptors (ESR1 and ESR2) and G protein-coupled estrogen receptor (GPER) also regulate male reproductive and nonreproductive organs. 17β-Estradiol (E2) is measureable in blood of men and males of other species, but in rete testis fluids, E2 reaches concentrations normally found only in females and in some species nanomolar concentrations of estrone sulfate are found in semen. Aromatase, which converts androgens to estrogens, is expressed in Leydig cells, seminiferous epithelium, and other male organs. Early studies showed E2 binding in numerous male tissues, and ESR1 and ESR2 each show unique distributions and actions in males. Exogenous estrogen treatment produced male reproductive pathologies in laboratory animals and men, especially during development, and studies with transgenic mice with compromised estrogen signaling demonstrated an E2 role in normal male physiology. Efferent ductules and epididymal functions are dependent on estrogen signaling through ESR1, whose loss impaired ion transport and water reabsorption, resulting in abnormal sperm. Loss of ESR1 or aromatase also produces effects on nonreproductive targets such as brain, adipose, skeletal muscle, bone, cardiovascular, and immune tissues. Expression of GPER is extensive in male tracts, suggesting a possible role for E2 signaling through this receptor in male reproduction. Recent evidence also indicates that membrane ESR1 has critical roles in male reproduction. Thus estrogens are important physiological regulators in males, and future studies may reveal additional roles for estrogen signaling in various target tissues.
Collapse
Affiliation(s)
- Paul S Cooke
- Department of Physiological Sciences, University of Florida, Gainesville, Florida; Department of Comparative Biosciences, University of Illinois at Urbana-Champaign, Urbana, Illinois; Department of Urology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois
| | - Manjunatha K Nanjappa
- Department of Physiological Sciences, University of Florida, Gainesville, Florida; Department of Comparative Biosciences, University of Illinois at Urbana-Champaign, Urbana, Illinois; Department of Urology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois
| | - CheMyong Ko
- Department of Physiological Sciences, University of Florida, Gainesville, Florida; Department of Comparative Biosciences, University of Illinois at Urbana-Champaign, Urbana, Illinois; Department of Urology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois
| | - Gail S Prins
- Department of Physiological Sciences, University of Florida, Gainesville, Florida; Department of Comparative Biosciences, University of Illinois at Urbana-Champaign, Urbana, Illinois; Department of Urology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois
| | - Rex A Hess
- Department of Physiological Sciences, University of Florida, Gainesville, Florida; Department of Comparative Biosciences, University of Illinois at Urbana-Champaign, Urbana, Illinois; Department of Urology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois
| |
Collapse
|
16
|
Menad R, Smaï S, Bonnet X, Gernigon-Spychalowicz T, Moudilou E, Khammar F, Exbrayat JM. Seasonal variations of aromatase and estrogen receptors expression in the testis of free-ranging sand rats. Acta Histochem 2017; 119:382-391. [PMID: 28427772 DOI: 10.1016/j.acthis.2017.03.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Revised: 03/29/2017] [Accepted: 03/29/2017] [Indexed: 12/16/2022]
Abstract
An increasing number of studies revealed the importance of estrogen in male reproduction. However, most research was conducted in laboratory rodents subjected to standardized environmental conditions. Therefore, seasonal regulations of estrogen pathways remain poorly understood under natural conditions. Using immunohistochemistry, the expression of several molecules involved in the functioning of testis (i.e. 17-β estradiol [E2], P450 aromatase, estrogen receptors ESR1, ESR2, and GPER1 [also known as GPR30]) were investigated in free-ranging fat sand rats, Psammomys obesus, during the breeding and resting seasons. Leydig cells showed a strong immunoreactivity for aromatase in the testis sampled during the breeding season only; however, E2, ESR1, ESR2 and GPER1 were present during both seasons. Sertoli cells showed a positive signal for E2 and ESR2 during the breeding season; though, all molecules, except GPER1, were present during the resting season. Spermatogonia were reactive for E2, ESR2 and GPER1 during the breeding season and for ESR1 and GPER1 during the resting season. During both seasons, spermatocytes-I presented a moderate reactivity for E2, ESR1, ESR2 and a strong reactivity for GPER1; aromatase was detected during the resting season only. Spermatids and spermatozoa were present exclusively during breeding season and were reactive for all molecules; except round spermatids that were negative for aromatase. The functioning of the testis depends on finely tuned stimulation and inhibition systems. Our results suggest that differential expression of aromatase, ESR1, ESR2, and GPER1 across cells types is involved in the seasonal activation/inactivation cycle of spermatogenesis in a free-ranging species.
Collapse
|
17
|
Beguelini MR, Puga CCI, Morielle-Versute E, Taboga SR. Comparative analysis of the male reproductive accessory glands of bats Noctilio albiventris
(Noctilionidae) and Rhynchonycteris naso
(Emballonuridae). J Morphol 2016; 277:1459-1468. [DOI: 10.1002/jmor.20587] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 07/12/2016] [Accepted: 07/22/2016] [Indexed: 01/22/2023]
Affiliation(s)
- Mateus R. Beguelini
- Center of Biological and Health Sciences; UFOB-Universidade Federal do Oeste da Bahia; Barreiras Bahia 47808-021 Brazil
| | - Cintia C. I. Puga
- Department of Zoology and Botany; UNESP-Univ. Estadual Paulista; São José do Rio Preto São Paulo 15054-000 Brazil
| | - Eliana Morielle-Versute
- Department of Zoology and Botany; UNESP-Univ. Estadual Paulista; São José do Rio Preto São Paulo 15054-000 Brazil
| | - Sebastião R. Taboga
- Department of Biology; UNESP-Univ. Estadual Paulista; São José do Rio Preto São Paulo 15054-000 Brazil
| |
Collapse
|
18
|
Martins FF, Beguelini MR, Puga CC, Morielle-Versute E, Vilamaior PS, Taboga SR. Morphophysiology and ultrastructure of the male reproductive accessory glands of the bats Carollia perspicillata, Glossophaga soricina and Phyllostomus discolor (Chiroptera: Phyllostomidae). Acta Histochem 2016; 118:640-651. [PMID: 27425652 DOI: 10.1016/j.acthis.2016.07.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 07/07/2016] [Accepted: 07/08/2016] [Indexed: 12/28/2022]
Abstract
The male reproductive accessory glands (RAGs) are important organs that contribute to the secretion of different substances that composed the ejaculate. Despite this important function, their composition, anatomy and function vary widely between species. Thus, the RAGs of three species of phyllostomid bats were morphologically and ultrastructurally characterized and compared in this study. The RAGs of the three analyzed species are composed of a prostate and a pair of bulbourethral glands (BG). In all species, the prostate is composed of three well-defined regions (ventral, dorsolateral and dorsal regions). The ventral region showed an atypical epithelium (undefined) with no obvious cellular limits and a holocrine PAS-positive secretion. The dorsolateral region of Carollia perspicillata and Phyllostomus discolor showed a pseudostratified cubic morphology, and that from Glossophaga soricina had a columnar morphology endowed with cytoplasmic projections and stereocilia. The dorsal region of the three analyzed species is composed of a pseudostratified columnar epithelium endowed with stereocilia; however, G. soricina also presented cytoplasmic projections in the apical portions of the secretory cells similar to those in the dorsolateral region. The BG of the three analyzed species are composed of a pseudostratified columnar epithelium including basal and PAS-positive secretory cells. In conclusion, this study morphologically and ultrastructurally characterized the RAGs of three species of phyllostomid bats, demonstrating the presence of a novel third prostatic region in species of this family. The results also showed the absence of seminal vesicles and ampullary glands, and better characterized the holocrine pattern of the prostatic ventral region, which is unique to bats.
Collapse
|
19
|
Puga CC, Beguelini MR, Morielle-Versute E, Vilamaior PS, Taboga SR. The effects of castration followed testosterone supplementation in prostatic complex of Artibeus planirostris (Chiroptera: Phyllostomidae). Tissue Cell 2016; 48:252-64. [DOI: 10.1016/j.tice.2016.02.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Revised: 02/26/2016] [Accepted: 02/27/2016] [Indexed: 10/22/2022]
|
20
|
Impact of the Processes of Total Testicular Regression and Recrudescence on the Epididymal Physiology of the Bat Myotis nigricans (Chiroptera: Vespertilionidae). PLoS One 2015; 10:e0128484. [PMID: 26057377 PMCID: PMC4461165 DOI: 10.1371/journal.pone.0128484] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Accepted: 04/27/2015] [Indexed: 01/16/2023] Open
Abstract
Myotis nigricans is a species of vespertilionid bat, whose males show two periods of total testicular regression within the same annual reproductive cycle in the northwest São Paulo State, Brazil. Studies have demonstrated that its epididymis has an elongation of the caudal portion, which stores spermatozoa during the period of testicular regression in July, but that they had no sperm during the regression in November. Thus, the aim of this study was to analyze the impact of the total testicular regression in the epididymal morphophysiology and patterns of its hormonal regulation. The results demonstrate a continuous activity of the epididymis from the Active to the Regressing periods; a morphofunctional regression of the epididymis in the Regressed period; and a slow recrudescence process. Thus, we concluded that the processes of total testicular regression and posterior recrudescence suffered by M. nigricans also impact the physiology of the epididymis, but with a delay in epididymal response. Epididymal physiology is regulated by testosterone and estrogen, through the production and secretion of testosterone by the testes, its conduction to the epididymis (mainly through luminal fluid), conversion of testosterone to dihydrotestosterone by the 5α-reductase enzyme (mainly in epithelial cells) and to estrogen by aromatase; and through the activation/deactivation of the androgen receptor and estrogen receptor α in epithelial cells, which regulate the epithelial cell morphophysiology, prevents cell death and regulates their protein expression and secretion, which ensures the maturation and storage of the spermatozoa.
Collapse
|
21
|
Beguelini MR, Góes RM, Rahal P, Morielle‐Versute E, Taboga SR. Impact of the processes of testicular regression and recrudescence in the prostatic complex of the bat
M
yotis nigricans
(
C
hiroptera:
V
espertilionidae). J Morphol 2015; 276:721-32. [DOI: 10.1002/jmor.20373] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2014] [Revised: 01/15/2015] [Accepted: 01/17/2015] [Indexed: 12/24/2022]
Affiliation(s)
- Mateus R. Beguelini
- Department of BiologyUNESP—Univ. Estadual PaulistaSão José do Rio PretoSão Paulo Brazil15054‐000
| | - Rejane M. Góes
- Department of BiologyUNESP—Univ. Estadual PaulistaSão José do Rio PretoSão Paulo Brazil15054‐000
| | - Paula Rahal
- Department of BiologyUNESP—Univ. Estadual PaulistaSão José do Rio PretoSão Paulo Brazil15054‐000
| | - Eliana Morielle‐Versute
- Department of Zoology and BotanyUNESP—Univ. Estadual PaulistaSão José do Rio PretoSão Paulo Brazil15054‐000
| | - Sebastião R. Taboga
- Department of BiologyUNESP—Univ. Estadual PaulistaSão José do Rio PretoSão Paulo Brazil15054‐000
| |
Collapse
|
22
|
Martins FF, Puga CC, Beguelini MR, Morielle-Versute E, Vilamaior PS, Taboga SR. Comparative analysis of the male reproductive accessory glands of bat species from the five Brazilian Subfamilies of the family Phyllostomidae (Chiroptera). J Morphol 2014; 276:470-80. [DOI: 10.1002/jmor.20354] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Revised: 10/21/2014] [Accepted: 11/18/2014] [Indexed: 12/22/2022]
Affiliation(s)
- Fabiane F. Martins
- Department of Biology; UNESP-Universidade Estadual Paulista; São José do Rio Preto São Paulo 15054-000 Brazil
| | - Cintia C.I. Puga
- Department of Biology; UNESP-Universidade Estadual Paulista; São José do Rio Preto São Paulo 15054-000 Brazil
| | - Mateus R. Beguelini
- Department of Biology; UNESP-Universidade Estadual Paulista; São José do Rio Preto São Paulo 15054-000 Brazil
| | - Eliana Morielle-Versute
- Department of Zoology and Botany; UNESP-Universidade Estadual Paulista; São José do Rio Preto São Paulo 15054-000 Brazil
| | - Patricia S.L. Vilamaior
- Department of Biology; UNESP-Universidade Estadual Paulista; São José do Rio Preto São Paulo 15054-000 Brazil
| | - Sebastião R. Taboga
- Department of Biology; UNESP-Universidade Estadual Paulista; São José do Rio Preto São Paulo 15054-000 Brazil
| |
Collapse
|