Title

Fluorometric quantitation of adenosine concentration in small samples of extracellular fluid

UMMS Affiliation

Department of Physiology

Date

11-15-1992

Document Type

Article

Subjects

Acetaldehyde; Adenosine; Animals; Anoxia; Ethenoadenosine Triphosphate; Extracellular Space; Exudates and Transudates; Fluorometry; Heart; Heart Ventricles; Male; Rats; Rats, Sprague-Dawley

Disciplines

Cardiovascular Diseases | Cellular and Molecular Physiology | Physiology

Abstract

Adenosine is a naturally occurring nucleoside which regulates many physiological processes by interacting with adenosine-specific receptors. Knowledge of the extracellular adenosine concentration at the site of adenosine receptors on target cells is required for an understanding of mechanisms involving the action of the nucleoside. Samples of extracellular fluid which reside in close proximity to the surface of target cells are frequently small in volume. This report describes improvements in accuracy and reliability of a fluorometric assay designed for determining the concentration of adenosine in microliter samples of extracellular fluids. The utility of the assay is demonstrated by determining adenosine concentrations in interstitial and coronary effluent samples from normoxic perfused rat hearts. The assay also clearly detects changes in the interstitial and coronary effluent adenosine levels produced by isoproterenol stimulation or hypoxia. Thus, this assay is useful for determining the adenosine concentration in microliter samples of extracellular fluid and should facilitate investigations dealing with the functions of adenosine.

Rights and Permissions

Citation: Anal Biochem. 1992 Nov 15;207(1):134-41.

Related Resources

Link to article in PubMed

PubMed ID

1489086