BACKGROUND The particles in the range of 1-100 nm are called nanoparticles. Gold nanoparticle is one of the most important metal nanoparticles with wide usage. OBJECTIVE This study investigated the effects of gold nanoparticles on sperm parameters and chromatin structure in mice. MATERIALS AND METHODS In this experimental study, 72 male bulb-c mice were divided into 9 groups including: 4 Sh...

Conventional (Giemsa, C-Banding, Ag-NORs, CMA3) and molecular (5S rDNA, 18S rDNA, telomeric sequences) cytogenetic studies were carried out in specimens of ten distinct fish populations of the genus Gymnotus (Gymnotus sylvius Albert and Fernandes-Matioli, 1999, Gymnotus inaequilabiatus Valenciennes, 1839, Gymnotus pantherinus Steindachner, 1908, and G. cf. carapo Linnaeus, 1758) from different ...

BACKGROUND Diabetes mellitus (DM), primary or idiopathic is a chronic disorder of the carbohydrate, lipid and protein metabolism. DM may impact male reproductive function at several levels. It is shown that DM has detrimental effects on sperm parameters in human and experimental animals. OBJECTIVE The aim of this study was to observe the effects of diabetes on sperm parameters (viability, cou...

The family Curimatidae is a fish group usually considered chromosomally conserved in their diploid number. However, some studies show small changes in the karyotype microstructure, and the presence of B chromosomes, indicating a chromosomal diversification within the group, even if structural changes in the karyotypes are not visible. Few studies associate this trait with an evolutionary patter...

Abstract Study question Does supplementation of human sperm media with L-Proline improve function and chromatin quality during in Vitro Incubation? Summary answer The inclusion L-proline as an antioxidant improves integrity probably by modulating oxidative stress What is known already Infertility affects millions people reproductive age globally. gametes one the most critical aspects that could...

Background: Globozoospermia is an uncommon disorder of sperm morphology associated with severe male infertility. Patients who contain both normal and round-headed sperm are called partial globozoospermic. It is possible that round-headed sperm may have an abnormal chromatin structure and /or DNA strand breaks. Moreover, sperm DNA fragmentation and protamine deficiency is shown to be associated ...

The stingless bee Partamona helleri (Meliponini) is distributed across the Atlantic rainforest biome in Brazil. Cytogenetic studies on P. have shown a conserved diploid number and presence of several B chromosome types. Our goal was to investigate intraspecific karyotypic variation among 21 colonies from 14 different localities four Brazilian states, using classical molecular cytogenetics, as w...