06
May
In addition, antibodies can trap (immobilize) individual sperm in mucus gel by forming weak but polyvalent crosslinks between the sperm and the gel-forming mucin fibers. isolated by Shinzo Isojima from the blood of an infertile woman, recognizes a carbohydrate epitope on CD52g, a glycosylphosphatidylinositol-anchored glycoprotein found in abundance on the surface of human sperm. We engineered the antibody for production inNicotiana; the new antibody which we call human contraception antibody, effectively agglutinates sperm at concentrations >10 g/ml and maintains activity under a variety of physiological conditions. We are currently seeking regulatory approval for a Phase 1 clinical trial, VPS33B which…