[Method for screening cysteinyl leukotriene receptor 2 antagonists and preliminary screening of compounds].
To establish a method for screening cysteinyl leukotriene receptor 2 (CysLT(2)) antagonists and to preliminarily screen a series of synthetic compounds.



Rat glioma cell line (C6 cells) highly expressing CysLT(2) receptor was used. Intracellular calcium concentration was measured after stimulation with the agonist LTD(4),which was used to screen compounds with antagonist activity for CysLT(2) receptor. Bay u9773, a CysLT1/CysLT(2) receptor non-selective antagonist, and AP-100984, a CysLT(2) receptor antagonist, were used as control.



PT-PCR showed a higher expression of CysLT(2) receptor in C6 cells. LTD(4) at 1 mumol/L significantly increased intracellular calcium in C6 cells; the maximal effect was about 37.5% of ATP, a positive stimulus.LTD(4)-induced increase of intracellular calcium was blocked by CysLT(2) receptor antagonists, but not by CysLT(1) receptor antagonists. Among the synthetic compounds, D(XW-)1,2,13,23,29 and 30 inhibited LTD(4)-induced increase of intracellular calcium.



LTD(4)-induced change in intracellular calcium in C6 cells can be used as a screening method for CysLT(2) receptor antagonists. The compounds, D(XW-)1,2,13,23,29 and 30, possess antagonist activity for CysLT(2) receptor.
Cai
Bei-Lei
BL
Department of Pharmacology, College of Medicine; 2.Institute of Medicinal Chemistry, College of Pharmacy, Zhejiang University, Hangzhou 310058, China.
Huang
Xue-Qin
XQ
Dong
Xiao-Wu
XW
Fang
San-Hua
SH
Lu
Yun-Bi
YB
Zhang
Wei-Ping
WP
Hu
Yong-Zhou
YZ
Shen
Jian-Gen
JG
Wei
Er-Qing
EQ
D000818:Animals; D001932:Brain Neoplasms / Q000473:pathology; D045744:Cell Line, Tumor; D004353:Drug Evaluation, Preclinical / Q000379:methods; D005910:Glioma / Q000473:pathology; D020024:Leukotriene Antagonists / Q000302:isolation & purification*; D017998:Leukotriene D4 / Q000378:metabolism / Q000494:pharmacology*; D051381:Rats; D018077:Receptors, Leukotriene / Q000737:chemistry
D020024:Leukotriene Antagonists; D018077:Receptors, Leukotriene; D017998:Leukotriene D4; C412375:cysteinyl leukotriene receptor 2