A single compartment simulation model of pharmacokinetics

For better understanding about derivation of various parameters related to pharmacokinetics, this model is developed. Animals or human volunteers are not used in this model but the principles used in pharmacokinetic studies in volunteers are incorporated. There is detailed description about setting of the model and derivation of various parameters step by step. An example is followed to illustrate the calculations involved. Possibilities of further extension of model to derive additional parameters and variations are discussed. The experience indicates that the model serves as a good demonstration to undergraduate students and a meaningful experiment for PG-students for learning and as a practical-examination exercise. The purpose of the article is to widen the use of this simple teaching tool at various centers.

Advances in recombinant polypeptide mimetics of PEG / 中国药科大学学报

@#Peptide and protein biologics possess high specificity and high biological activity, but their poor stability and short plasma half-life have limited clinical application. One established strategy to increase half-life of therapeutic proteins is chemical conjugation of the biologic with PEG. Nevertheless, PEGylation technology has some drawbacks, so recombinant polypeptide mimetics of PEG have gradually developed in recent years. Pharmaceutically active protein can be fused with specific amino acid sequences using recombinant DNA technology, and then increase hydrodynamic volume or produce charge effect, which retards kidney filtration and eventually prolongs the half-life. This article mainly reviews kinds of polypeptides and the research progress in half-life extension of therapeutic proteins.

STUDY ON THE PHARMACOKINETIC OF RIFAPENTINE IN VOLUNTEERS / 中国药理学通报

The pharmacokinetic study of Rifapentine by daily oral administration for 10d and followed by twice weekly for another 3 weeks in 9 volunteers and in comparism with Rifandin were reported. The results showed that the absorption and excretion of Rifapentine were markedly slower than that of Rifandin, its T1/2 was 15h. The Peak plasma level and T1/2 decreased after repeated administration of the drug. This suggested that Rifapentine and Rifandin in similar to Ri-fampin were hepatic microsomal enzyme inducers.