ABSTRACT
Objective To observe the effect of Xiaozhong Sanyu pills (XZSY) on neurological severity score (NSS), brain water content and expression level of water channel aquaporin 4 (AQP4) in rats with intracerebral hemorrhage (ICH). Methods ICH model was reproduced by Rosenberg method in 150 SD rats, then the animals were randomly divided into model group (n=50), XZSY high dose group (n=50, 40 mg/kg of XZSY suspension was given by intragastric administration, bid) and XZSY low dose group (n=50, 20 mg/kg of XZSY suspension was given by intragastric administration, bid), and the latter two groups were further randomly divided into 12-h and 1-, 3-, 7-, and 10-d subgroups. The differences in NSS, brain water content and expression level of AQP4 among 3 groups were analyzed. Results Compared with control group, the NSS, brain water content and expression level of AQP4 were lowered at 3, 7 and 10 d in XZSY low dose group, and lowered at 1, 3, 7 and 10 d in XZSY high dose group (P<0.05, P<0.01). Compared with XZSY low dose group, the NSS and brain water content were lowered on 7 and 10 d, and expression level of AQP4 was lowered at 3, 7 and 10 d in XZSY high dose group (P<0.05, P<0.01). Conclusion Early administration of XZSY could reduce the expression of AQP4 after cerebral hemorrhage, and accordingly alleviate the intracellular edema and improve the prognosis of ICH.
ABSTRACT
As a novel branch of combinational chemistry, dynamic combinatorial chemistry (DCC) can be viewed as a technique which combines library synthesis and screening in one pot. By addition of molecular target, ligangds, which show binding affinity or strong interaction with the molecular target, can be amplified an young but rapidly growing branch of combinatorial chemistry, has been widely used in organic chemistry, biochemistry, material fields. Ligands in the library can be amplified, since synthesis of the library is screened by a molecular target. Therefore, these structures could be identified easily. Consequently DCC has been widely used in the lead discovery, material chemistry and other fields. On the basis of the principle and method of DCC, this review emphasizes the three factors of DCC, including molecular targets (bio-enzyme, lectin, nucleic acid, organic molecule, inorganic molecule); reaction (disulphide chemistry, ammoniation reduction reaction, hydrazone chemistry, etc.) and analytical method. Meanwhile, limitation, current situation and future development of DCC were also discussed in this paper.
