Secretion of steroids, growth factors, and cytokines by immortalized mouse granulosa cell lines.

The expression and function of gonadotropin receptors, and the secretion of steroids, transferrin, and cytokines were investigated in three immortalized (single transfection with v-myc) mouse granulosa cell lines (GRM01, GRM01L, and GRM02). A dose-dependent increase in progesterone production was obtained in GRM01 and GRM02 cells after addition of LH, FSH, modulators of the adenylate cyclase enzyme system, and cAMP analogues. The LH-induced release of progesterone was already detectable in GRM02 cells after 8 h and was related to incubation time and cell number.

Alpha 1-acid glycoprotein concentration and molecular heterogeneity: relationship to oxprenolol binding in serum from healthy volunteers and patients with lung carcinoma or cirrhosis.

1. alpha 1-acid glycoprotein (AAG) concentration and molecular heterogeneity, and oxprenolol protein binding were studied in serum of 15 healthy volunteers, 14 patients with lung carcinoma and 17 patients with liver cirrhosis. 2.

Influence of inflammation on serum concentration, molecular heterogeneity and drug binding properties of canine alpha-1-acid glycoprotein.

The concentration and the heterogeneity of alpha-1-acid glycoprotein (alpha-1-AGP) and oxprenolol binding were determined in serum of healthy dogs and dogs with inflammatory disease. In inflammation, an increase in the mean alpha-1-AGP concentration from 0.47 to 2.

Dog alpha-1-acid glycoprotein: purification and biochemical characterization.

Dog alpha-1-acid glycoprotein was purified to homogeneity from dog serum in a three-step procedure involving precipitation with sulphosalicylic acid, isoelectric focusing and size exclusion chromatography. The molecular heterogeneity in the peptide part and in the carbohydrate part of the molecule was investigated with analytical isoelectric focusing in a narrow pH range and crossed immunoaffinity electrophoresis with concanavalin A (con A) in the first-dimension gel. Up to seven molecular forms with different isoelectric points were found, whereas only a single con A-dependent molecular form was detected.

Influence of enhanced alpha-1-acid glycoprotein concentration on protein binding, pharmacokinetics and antiarrhythmic effect of lidocaine in the dog.

The pharmacokinetics and the antiarrhythmic effect of lidocaine were studied in healthy dogs on three occasions: before administration of rifampicin, on the 14th day of treatment with rifampicin and 4 weeks after stopping rifampicin treatment. On each occasion a loading and a maintenance infusion of lidocaine were given to obtain steady-state concentrations. Blood and plasma concentrations of lidocaine, alpha-1-acid glycoprotein plasma concentrations and percentage of free lidocaine in plasma were determined at the end of the maintenance infusion.