Clinical drug-drug interactions（DDIs） induced by CYP3A may reduce the exposure and pharmacological activity of CYP3A ***-regulation of CYP3A mRNA is often used to evaluate inductive effect of test compounds on CYP3A...
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Clinical drug-drug interactions（DDIs） induced by CYP3A may reduce the exposure and pharmacological activity of CYP3A ***-regulation of CYP3A mRNA is often used to evaluate inductive effect of test compounds on CYP3A. A quantitative real time PCR assay was developed and validated for the absolute quantification of CYP3A1 and CYP3A2 *** primers of CYP3A1,CYP3A2 and GAPDH（glyceraldehyde-3-phosphate dehydrogenase,as a house-keeping gene） were well *** relationship between threshold cycle（Ct） and logarithm of the concentrations of CYP3A1, CYP3A2 and GAPDH was linear ranged from 1 attomol/μL to 1×10~6 attomol/uL with great inter- and intra-assay reproducibility. This method was successfully applied to investigate the time courses of CYP3A1 and CYP3A2 mRNA induction in rat liver after 100 mg/kg dexamethasone（DEX） administration by intraperitoneal（i.p.） *** baseline levels of CYP3A1 and CYP3A2 mRNAs were 37.78 attomol/ug（total RNA） and 252.31 attomol/ug（total RNA）,***3A1 and CYP3A2 mRNA values increased gradually to their peak levels（19- and 8- fold ***） within 24 h and 42 h,respectively,and then returned to their baseline 60 h after DEX administration.
Aquaporins (AQPs) is a novel family of membrane protein which is in charge of the transportation of water across the membranes. It has been testified that AQPs may be related to many physiological functions and pathop...
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Aquaporins (AQPs) is a novel family of membrane protein which is in charge of the transportation of water across the membranes. It has been testified that AQPs may be related to many physiological functions and pathophysiological disorders. In lung, 6 subtypes of AQPs were found, 4 of which have been located in certain tissue. AQP1, AQP3, AQP4 and AQP5 are located in upper respiratory tract and may contribute to the mucus production, bronchial moisturizing and gland secretion. AQP1 and AQP5 are located in lower respiratory tract and may participate in directing the water movement across the blood-gas barrier. AQPs in natal lung may be an important factor to accelerate the reabsorption of the lung liquid. In adult, some diseases such as asthma, pulmonary edema, adult respiratory distress syndrome, which have been considered unbalanced water movement, may be also concerned with AQPs. The relationship between lung edema and AQPs have not been elucidated in details. It should be verified how AQPs work in more organs and tissues as well as in some diseases.
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