Análise qualitativa do estabelecimento da espermatogênese em cutias (Dasyprocta aguti) criadas em cativeiros

Neto, Antônio Chaves de Assis; Melo, Maria Isabel Vaz de; Carvalho, Maria Acelina Martins de; Miglino, María Angélica; Oliveira, Moacir Franco de; Menezes, Danilo José Ayres de; Papa, Paula de Carvalho; Júnior, José Roberto Kfoury

doi:10.1590/s1413-95962003000900004

Cited by 16 publications

(15 citation statements)

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“…In the Spix's yellow-toothed cavies studied here, the Sertoli cell index was not stable, which indicates that up to 150 days of age Spix's yellow-toothed cavy is not in a stage of sexual maturity. This is similar to what has been reported in agoutis (Assis- Neto et al 2003c), while in chinchillas, the index of Sertoli cells was found to increase 2-fold from 5 to 17 months of age (Leal and França 2009).…”

Section: Spermatogenetic Yield and Sertoli Indexsupporting

confidence: 90%

“…Spermatogenic output is an important indicator of sperm production capacity, and it may serve as a parameter for determining the ideal age for entering reproductive activity (Assis- Neto et al 2003c). From the time of puberty, this yield increases gradually and stabilises upon reaching sexual maturity (França and Cardoso 1988;Melo and Vale Filho 1992).…”

Section: Spermatogenetic Yield and Sertoli Indexmentioning

confidence: 99%

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Development of spermatogenesis in captive-bred Spix's yellow-toothed cavy (Galea spixii)

Santos

Oliveira

Silva

et al. 2012

Reprod. Fertil. Dev.

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Abstract. The aim of this study was to evaluate the phases of sexual development and spermatogenesis of Spix's yellowtoothed cavy (Galea spixii) based on analyses of the structural components of the testes. The testes of animals from 0 to 150 days of age were collected by orchiectomy, weighed, and processed for analysis by light microscopy. At 45 days of age, spermatozoa were seen in the tubular lumen. Spermatogenesis was not established in animals from 45 to 150 days of age. The stages of sexual development may be classified into the following phases: from birth to the age of 15 days (immature); 30 days of age (prepubertal); 45-105 days of age (pubertal); and 120 and 150 days of age (postpubertal). This is the first study to address the male reproductive biology of Spix's yellow-toothed cavy.

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Section: Spermatogenetic Yield and Sertoli Indexsupporting

confidence: 90%

Section: Spermatogenetic Yield and Sertoli Indexmentioning

confidence: 99%

Development of spermatogenesis in captive-bred Spix's yellow-toothed cavy (Galea spixii)

Santos

Oliveira

Silva

et al. 2012

Reprod. Fertil. Dev.

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“…Through qualitative analysis of spermatogenesis progress in agoutis (Dasyprocta aguti), it was evaluate the lumination aspects of seminiferous tubules, as well as the presence of primary spermatocytes, spermatids and the formation of first stages of seminiferous epithelium cycle. The puberty of the agouti occurred at seven months old, and it is complete at nine months (Assis Neto et al 2003). In our studies, we observed the differentiation of spermatid in 45-day-old guinea pigs, and the presence of spermatozoa was seen in 90-day-old animals.…”

Section: Discussionsupporting

confidence: 62%

Ultrastructural analysis of the spermatogenesis in the guinea pig (Cavia porcellus)

et al. 2016

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al for both, the establishment of appropriate management systems, and for the use of new species as animal models. In this study, we used light and electron microscopy to characterize the sexual development stages of the guinea pig (Cavia porcellus) in specimens of 30, 45 and 90 days of age. We observed the differentiation of spermatocytes only through transmission electron microscopy in the leptotene, zygotene and pachytene phases of meiosis, in 30-day-old animals. During puberty, there was differentiation of the germinative epithelium and formation of the acrosome. Spermatozoa, however, were not detected. Thus, we could infer that puberty happens after 45 days of age. Sexual maturity was evident in 90-day-old specimens. Our results showed that changes in the testicular germinative epithelium during the postnatal sexual development in guinea pig led to morphological changes, including the ones related to the development of Leydig and Sertoli cells, which are directly related to puberty. In this work, we provide new morphological subsidies for a better understanding of reproductive parameters of this species, enabling its use as an animal model in the field of the reproductive biology.

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“…Em cobaios, a morfologia das células espermatogênicas e de Sertoli foi semelhante à descrita para mamíferos em geral (Courot et al 1970, Assis-Neto et al 2003b, de modo que na semana cinco de idade os elementos celulares observados indicaram a fase pré-púbere tardia, na semana 6 a fase púbere e nas semanas nove e onze as fases pós-púbere 1 e 2, respectivamente. Para o entendimento do processo espermatogênico torna-se essencial o estudo quantitativo das células que compõem o epitélio seminífero, pois possibilita avaliar a espermatogênese determinando seu rendimento intrín-seco e também o acompanhamento quantitativo da evolução de cada tipo celular ao longo do ciclo espermatogêni-co (Cardoso 2009), permitindo a identificação das causas potenciais de infertilidade e subfertilidade, assim como a compreensão dos processos que definem a capacidade de produção espermática (Aguiar et al 2006).…”

Section: Discussionunclassified

Análise morfológica e funcional do processo espermatogênico em cobaios (Cavia porcellus) da pré-puberdade até a pós-puberdade

et al. 2013

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Pesq. Vet. Bras. 33(Supl.1):1-7, dezembro 2013 1 semanas de idade (N=5/grupo). Os aspectos analisados incluíram a contagem das populações celulares presentes no estádio 1 do ciclo do epitélio seminífero (CES), eficiên-cia das mitoses espermatogoniais (RMi), produção meió-tica (RMe), rendimento geral da espermatogênese (RGE), índice de células de Sertoli (ICS) e capacidade de suporte das células de Sertoli (CSCS). Os resultados mostraram que número médio de espermatogônias A, espermatócitos primários em pré-leptóteno/leptóteno, espermatócitos primários em paquíteno, células espermatogênicas totais e células de Sertoli mostraram variações numéricas em funAnálise morfológica e funcional do processo espermatogênico em cobaios (Cavia porcellus) da pré-puberdade até a pós-puberdade This study describes the morphological and functional analysis of spermatogenesis in guinea pigs (Cavia porcellus) with five (W5), six (W6), nine (W9) and eleven (W11) weeks of age (n=5/group). The aspects analyzed include counts of cell populations present in stage 1 of seminiferous epithelium cycle (SEC), efficiency of spermatogonial mitosis (EMi), meiotic production (EMe), overall yield of spermatogenesis (EOS), Sertoli cell index (SCI) and carrying capacity of Sertoli cells (CCSC). The results showed that the average number of spermatogonia type A, primary spermatocytes in pré-leptóteno/leptóteno, primary spermatocytes in pachytene, total spermatogenic cells and Sertoli cells showed numerical variations according to age; however they were statistically not detected, while round spermatids increased significantly at puberty and then stabilized. The spermatogenic production of 5 to 11-week-old guinea pigs did not reach the stabilization point, and the RMi, RME, EOS, SCI and CCSC showed significant number variation as a function of age. The results demonstrate that Cavia porcellus in post-pubertal stage 2 are an advantageous experimental model to address studies on the processes of homologous recognition, alignment, and synapsis during meiotic prophase; intrinsic yield of spermatogenesis in guinea pigs is similar to Wistar rats, paca and agouti (Dasyprocta sp.) and lower than in cavies, whereas the functional efficiency of Sertoli cells is higher than in agouti and Wistar rats, and lower than in pacas, spiny rat and collared peccaries. We conclude that in guinea pigs the spermatogenesis is fully established at 6 weeks of age, indicating the pubertal stage of sexual development, and until week 11 they do not reach the maximum daily sperm production and therefore sexual maturity. RESUMO.-Este estudo descreveu as análises morfológica e funcional do processo espermatogênico em cobaios (Cavia porcellus) de cinco (S5); seis (S6); nove (S9) e onze (S11)

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Análise qualitativa do estabelecimento da espermatogênese em cutias (Dasyprocta aguti) criadas em cativeiros

Cited by 16 publications

References 0 publications

Development of spermatogenesis in captive-bred Spix's yellow-toothed cavy (Galea spixii)

Development of spermatogenesis in captive-bred Spix's yellow-toothed cavy (Galea spixii)

Ultrastructural analysis of the spermatogenesis in the guinea pig (Cavia porcellus)

Análise morfológica e funcional do processo espermatogênico em cobaios (Cavia porcellus) da pré-puberdade até a pós-puberdade

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