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Correlation between sperm characteristics and testosterone in bovine seminal plasma by direct radioimmunoassay R. Bras. Zootec.
Souza,Luiz Waldemar de Oliveira; Andrade,André Furugen Cesar; Celeghini,Eneiva Carla Carvalho; Negrão,João Alberto; Arruda,Rubens Paes de.
The objectives of this study were to validate a non-extractive RIA for seminal testosterone and quantify the hormone using a solid-phase commercial kit, and study the correlation between testosterone in seminal plasma and sperm characteristics. Parallelism showed a correlation index r = 0.992 (Y = -5.47 + 1.073X; R² = 0.985), indicating that the non-extractive method presented is indicated particularly for assessment of testosterone when establishing comparisons between samples. Overall mean (±SD) of testosterone level was 0.60±0.65 ng/mL. Correlation was only found between the seminal concentrations of testosterone and pH of the semen.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bull; Hormone; RIA; Semen; Spermatozoa; Testosterone.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001200015
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Damage assessment of the equine sperm membranes by fluorimetric technique BABT
Celeghini,Eneiva Carla Carvalho; Andrade,André Furugen Cesar de; Raphael,Cláudia Fernandes; Nascimento,Juliana; Ticianelli,Janahi Souza; Arruda,Rubens Paes de.
To validate a practical technique of simultaneous evaluation of the plasma, acrosomal and mitochondrial membranes in equine spermatozoa three fluorescent probes (PI, FITC-PSA and MITO) were associated. Four ejaculates from three stallions (n=12) were diluted in TALP medium and split into 2 aliquots, 1 aliquot was flash frozen in liquid nitrogen to induce damage in cellular membranes. Three treatments were prepared with the following fixed ratios of fresh semen: flash frozen semen: 100:0 (T100), 50:50 (T50), and 0:100 (T0). A 150-µL aliquot of diluted semen of each treatment was added of 2 µL of PI, 2 µL of MITO and 80 µL of FITC-PSA; incubated at 38.5ºC/8 min, and sperm cells were evaluated by epifluorescent microscopy. Based in regression analysis, this...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Stallion; Acrosome; Plasma membrane; Mitochondria; Fluorescent probes.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000600004
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