MORPHOMETRY AND STEREOLOGY OF THE INTERSTITIAL COMPARTMENT IN THE WILD RODENT HYLAEAMYS MEGACEPHALUS (RODENTIA: CRICETIDAE) FROM CENTRAL BRAZIL

Autores

  • Fabiana Cristina Melo
  • Tatiane Sousa
  • Kyvia Costa
  • Sérgio Luis Matta
  • Fabiano Melo

Palavras-chave:

Leydig cell, lymphatic space, connective tissue, testes, blood vessel

Resumo

Little is known about the testicular components in wild rodents, particularly the interstitial compartment. The aim of this study was to describe the testis morphometry and stereology of Hylaeamys megacephalus, with emphasis in the interstitial compartment. In this study were used five animals captured in forest fragments in southwestern Goiás. The testes were removed, fixed in Karnovsky, dehydrated, embedded in methacrylate, sectioned with two-micrometer-thick, and stained with 1% toluidine blue/sodium borate. The histological sections of testes were evaluated using light microscopy. The interstitial compartment volume density was 5.5%, consisting predominantly of Leydig cells (3.21%), followed by blood vessels (0.97%), connective tissue (0.83%) and lymphatic space (0.53%). The Leydigossomatic index was 0.015%. The interstitial pattern in H. megacephalus was similar to pattern I of Fawcett’s classification as was found in capybara. The Leydig cell average volume in H. megacephalus was 350.80 µm3 , close to the lowest values observed in several domestic, wild and laboratory species. The number of Leydig cells per testis and per gram of testis was higher than observed in other small rodents. 

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Publicado

2015-06-01

Como Citar

Melo, F. C. ., Sousa, T. ., Costa, K. ., Matta, S. L. ., & Melo, F. (2015). MORPHOMETRY AND STEREOLOGY OF THE INTERSTITIAL COMPARTMENT IN THE WILD RODENT HYLAEAMYS MEGACEPHALUS (RODENTIA: CRICETIDAE) FROM CENTRAL BRAZIL . ENCICLOPEDIA BIOSFERA, 11(21). Recuperado de https://conhecer.org.br/ojs/index.php/biosfera/article/view/1955