Background: Chromomycin A3 (CMA3) staining, with the slide method or fluorescence microscopy, is widely used for indirect assessment of protamine deficiency in a semen sample. Flow cytometry is the most suitable tool which to improve assessment accuracy, both in terms of statistical analysis and to prevent observer variation. This study provides a simple procedure to account for merocyanine 540...

Defibrillation shocks from implantable cardioverter defibrillators can be lifesaving but can also damage cardiac tissues via electroporation. This study characterizes the spatial distribution and extent of defibrillation shock-induced electroporation with and without a 45-min postshock period for cell membranes to recover. Langendorff-perfused rabbit hearts (n = 31) with and without a chronic l...

In order to easily assess growth and destruction of Toxoplasma gondii in vitro, this report describes two double staining assays that both visualize live and dead organisms: acridine orange--ethidium bromide (AO-EB) and bisbenzimide (Hoechst 33258)--propidium iodide (B-PI). EB and PI were chosen for dead organisms staining while AO and B stain viable organisms. Thus, both double staining assays...

The purpose of the present study is to investigate the cytotoxicity/apoptotic effect of 2-chloro-2′-deoxyadenosine, cladribine, (2-CdA) in the human breast cancer cell line, MDA-MB468 (estrogen receptor negative, ER−). MTT [3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H tetrazolium bromide] assay, annexin V-Fluorescein/PI and Hoechst 33258 staining were used to detect cytotoxicity and cell apopto...

Calprotectin, a calcium-bound protein complex, is abundant in the cytosol of neutrophils. It has been reported that this protein has an apoptotic activity in tumor cells. Since calprotectin increases in colorectal cancer, this study was conducted to investigate, for the first time, the cytotoxicity/apoptotic effect of calprotectin on HT29/219 and SW742 colon carcinoma and adenocarcinoma cell li...

Objective: The current study tries to elucidate the impact of low-affinity Pi transporter Pho91 (using pho91Δ cells) on lipid metabolism and cellular organelles morphology (mitochondria vacuole) in yeast Saccharomyces cerevisiae. Methods: profile was performed using thin layer chromatography (TLC), membrane defect determined DiOC6 staining, droplets (LDs) were observed by Nile red mitochondrial...

Background and objectives: To date, thousands of secondary metabolites have been isolated from plants and microorganisms and there is an unprecedented attention towards potential biomedical applications of natural compounds. In this study, cytotoxic properties of methanol extracts of Stachys obtusicrena, Aristolochia olivieri, Linum album, Dionysia sawyeri, Ajuga chamaecist...

OBJECTIVE The recent advent of flow cytometry (FCM), coupled with fluorescent dyes, has been successfully applied to assess mitochondrial function. The aim of this study was to investigate the feasibility and clinical significance of detecting sperm mitochondrial function and to evaluate sperm mitochondrial function by using Rhodamine 123/propidium (Rh123/PI) dual fluorescent staining and FCM i...

Studies of cellular apoptosis have been significantly impacted since the introduction of flow cytometry-based methods. Propidium iodide (PI) is widely used in conjunction with Annexin V to determine if cells are viable, apoptotic, or necrotic through differences in plasma membrane integrity and permeability. The Annexin V/PI protocol is a commonly used approach for studying apoptotic cells. PI ...