Determination of nitric oxide generation in mammalian neurons using dichlorofluorescin diacetate and flow cytometry.

Abstract:

:A method for the rapid detection of intracellular nitric oxide (NO) generation in dissociated cerebellar granule cells using dichlorofluorescin (DCFH) and flow cytometry was developed. DCFH can be oxidized specifically by NO and this was assessed by 1) the use of SIN-1 (10 nM-100 microM), an NO donor, that induced a concentration-dependent increase in dichlorofluorescein (DCF) fluorescence and 2) the use of hemoglobin (10 microM), an NO-scavenger, that totally inhibited the increase of fluorescence induced by SIN-1 (10 microM). This assay was used to determine the ability to kainate to stimulate NO production in dissociated cerebellar granule cells. Kainate (1 microM-10 mM) induced an increase in DCF fluorescence that was partially reduced by NG-nitro-L-arginine (1 nM-10 microM), a nitric oxide synthase inhibitor (61.9% +/- 9.1), or hemoglobin (10 microM) (55.0% +/- 4.1). The method described allows evaluation of the oxidation of DCFH to produce DCF as a parameter for measuring intracellular NO generation. The extent of DCFH oxidation by NO and ROS can be determined by using NO scavengers or NO synthase inhibitors.

authors

Gabriel C,Camins A,Sureda FX,Aquirre L,Escubedo E,Pallàs M,Camarasa J

doi

10.1016/s1056-8719(97)00066-x

subject

Has Abstract

pub_date

1997-10-01 00:00:00

pages

93-8

issue

2

eissn

1056-8719

issn

1873-488X

pii

S1056-8719(97)00066-X

journal_volume

38

pub_type

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