This study demonstrates the presence of [3H]-progesterone binding protein on the cell surface of human spermatozoa. The binding protein is masked and is exposed after treatment of spermatozoa with surfactants such as digitonin. Specific binding of [3H]-progesterone is observed after the washed spermatozoa or the crude cell membrane fractions are treated with 0.1% digitonin at 0-4 degrees C for ...

context occult hepatitis b (ohb), or persistent hbv dna in patients who are hepatitis b surface antigen (hbsag) negative, is a recently recognized entity. in an attempt to summarize the issues, this review presents an overview of the current proposed hypothesis on the clinical relevance and also updates the knowledge on the classification of ohb in different clinical settings. evidence acquisit...

During the development of pseudopodial spermatozoa of the nematode, Caenorhabditis elegans, protein synthesis stops before differentiation is completed. Colloidal gold conjugates of monoclonal antibody SP56, which binds to the surface of spermatozoa, and TR20, which recognizes the major sperm cytoplasmic protein (MSP), were used to label thin sections of testes embedded in Lowicryl K4M in order...

Induction of human sperm chemotaxis is an established phenomenon, though signaling systems physiologically involved have not been identified. Recently, it has been demonstrated that RANTES is present in the follicular fluid and that this molecule is a chemoactractant for human spermatozoa. However, the presence of beta-chemokine receptors on human spermatozoa has never been reported. By cytomet...

OBJECTIVE Epididymal protease inhibitor (Eppin) was located on the surface of spermatozoa and modulates the liquefaction of human semen. Here, we identify the correlative protein partner of Eppin to explore the molecular mechanism of liquefaction of human semen. METHODS (1) Human seminal vesicle proteins were transferred on the membrane by Western blotting and separated by 2-D electrophoresis...

introduction: intravenous drug users as a serious health problem in communities have economical and social effects as well as health and hygienic complications. viral infections may be transmitted through drug injection by shared syringes among users. the aim of this study has been to determine the relative frequency of hbv, hcv and hiv infection’s markers as epidemiological data in ahvaz. mate...

conclusions in hbeag positive chb patients, low serum hbsag level is a useful predictor of compensated cirrhosis. objectives the aim of our study was to evaluate serum hbsag level as a biomarker for compensated cirrhosis in hepatitis b e antigen (hbeag) positive chb patients. patients and methods two-hundred and one hbeag-positive chinese chb patients with or without cirrhosis were enrolled in ...

A monoclonal antibody (4C7/2E4) that binds to an antigen located on the midpiece of turkey spermatozoa has been produced and characterized. The antibody was also reactive to antigens on the midpiece of chicken, Japanese quail, and bobwhite quail spermatozoa but was unreactive to spermatozoa from guinea fowl, human, horse, boar, and bull. Immunogold transmission electron microscopy of turkey spe...

two glycoprotein sperm-specific antigens of testicular origin and twelve seminal plasma antigens which coated the spermatozoa during passage through the reproductive tract. Two of the sperm-coating antigens originated in the testis, two in the epididymis and eight above the level of the vas deferens. Relationships between sperm-coating antigens and capacitation, and sperm-coating antigens and p...