Real time measurement of nitric oxide released from cultured endothelial cells.

Abstract:

:Direct detection of nitric oxide (NO) is essential for understanding the precise mechanism of its production from endothelial cells. Previously, we developed an NO detection system based on the chemiluminescence reaction between NO and luminol-H2O2. Here, we have applied this system to cultured endothelial cells for the direct and on-time measurement of NO. The perfusate from cultured endothelial cells was continuously mixed with luminol-H2O2. N(G)-monomethyl-L-arginine (L-NMMA) (10(-4) M) decreased the chemiluminescence signal of NO, suggesting the existence of basal NO release. Bradykinin (10(-8) M-10(-6) M) increased the NO signal (10(-6) M; 5.1+/-0.4 fmol/min, corresponding to 1.7 pM in the perfusate), and this was inhibited by 10(-4) M L-NMMA (1.8+/-0.3 fmol/min). These results corresponded to the changes in cGMP levels in RFL-6 cells, which provide an NO bioassay system. We conclude that the luminol-H2O2 system is useful for the direct and continuous measurement of NO from cultured endothelial cells.

journal_name

Biol Pharm Bull

authors

Kurumatani H,Kikuchi K,Nagano T,Hirobe M,Yamazaki J,Nagao T

doi

10.1248/bpb.21.1286

subject

Has Abstract

pub_date

1998-12-01 00:00:00

pages

1286-9

issue

12

eissn

0918-6158

issn

1347-5215

journal_volume

21

pub_type

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