introduction: during spermiogendsis, sperm chromatin histones are replaced by protamine. after fertilization, the sprem nucleus is decondenced by glutathione (gsh). in this survey, we study the effect of various concentrations of gsh on human in vitro sperm decondensation. material and methods: after preparation and analysis of semen samples, sperm pellet was washed by ham's f-10 medium twice a...

Motivation One objective of human microbiome studies is to identify differentially abundant microbes across biological conditions. Previous statistical methods focus on detecting the shift in the abundance and/or prevalence of the microbes and treat the dispersion (spread of the data) as a nuisance. These methods also assume that the dispersion is the same across conditions, an assumption which...

Linker DNA, which connects between nucleosomes in chromatin, is short and, therefore, may be essentially straight and inflexible. We have carried out hydrodynamic and electron microscopic studies of dinucleosomes--fragments of chromatin containing just two nucleosomes--to test the ability of linker DNA to bend. We find that ionic conditions that stabilize the folding of long chromatin cause lin...

OBJECTIVE The present study was designed to determine the effect of the freeze-thawing procedure, computer controlled rate freezing and duration for six months, on human sperm chromatin (assessed by acridine orange test), vitality, motility, and morphology. DESIGN Experimental study MATERIAL AND METHOD Twenty semen samples were obtained from patients attending the infertility unit. The seme...

eight accessions of thyme medicinal plant, belonging to iranian endemic thymus daënensis, t. eriocalyx, t. migricus and an unknown thymus spp species, were tested for karyotypic analysis, using squash technique and 2% (w/v) aceto-orcein staining method. chromosomal parameters examined were: short arm (s), long arm (l), total length of chromosome (tl), arm ratio (ar), r-value, total chromosome v...

OBJECTIVE To test the hypothesis that the retinal pigment epithelial/photoreceptor complex is affected in patients with pigment dispersion syndrome and/or in patients with pigmentary glaucoma. METHODS Electro-oculograms were recorded from patients with pigment dispersion syndrome, pigmentary glaucoma, ocular hypertension, and primary open-angle glaucoma and from control subjects. Electro-ocul...

This study was conducted to determine chromatin integrity and DNA damage by DNA electrophoresis and comet assays of buffalo fresh and frozen semen. Semen samples were collected from four buffalo bulls and evaluated after freezing for semen motility, viability, sperm abnormalities, chromatin integrity and DNA damage. A significant variation was found in semen parameters after thawing. Highly sig...

Prednisolone is an analgesic and anti-inflammatory drug. It possesses poor aqueous solubility and has irritant effects on stomach mucosa. In order to modulate its gastric side effect and increase aqueous solubility, physical mixture and solid dispersion of prednisolone were prepared with skimmed milk. In this study, anti-inflammatory and analgesic effects of these formulations were investigated...

Many long noncoding RNAs are bound to chromatin. MEG3 binds to multiple different genomic locations, containing GA-rich motifs, and form RNA-DNA triplex structures. In this work, we test whether the MEG3 binding sites are specific enough to be regulated by a particular lncRNA. We show that at least in the case of MEG3, a subset of the triplex target sites (TTS) is able to hybridize with various...

Prednisolone is an analgesic and anti-inflammatory drug. It possesses poor aqueous solubility and has irritant effects on stomach mucosa. In order to modulate its gastric side effect and increase aqueous solubility, physical mixture and solid dispersion of prednisolone were prepared with skimmed milk. In this study, anti-inflammatory and analgesic effects of these formulations were investigated...