In this study the effect of adenosine and caffeine on spontaneous activity of paragigantocellularis (PGi) neurons was investigated. The spontaneous activity of PGi neurons was significantly decreased by microinjection of adenosine (10 nM, 0.5 µl) into PGi nucleus of both control and morphine-dependent rats. The decrease in firing rate of PGi neurons of morphine-dependent rats was greater than t...

Adenosine may be a physiological modulator of vascular smooth muscle tone, sympathetic neurotransmission, renin release, and renal and cardiac function. To facilitate the elucidation of the physiological role of adenosine, a microassay for adenosine was developed that allows accurate quantitation of adenosine in 75 microliters of rat plasma, thus permitting multiple determinations of plasma ade...

In diabetes several aspects of immunity are altered, including the immunomodulatory action of adenosine. Our study was undertaken to investigate the effect of different glucose and insulin concentrations on activities of adenosine metabolizing enzymes in human B lymphocytes line SKW 6.4. The activity of adenosine deaminase in the cytosolic fraction was very low and was not affected by different...

Spinal gabapentin and adenosine have been known to display an antinociceptive effect. We evaluated the nature of the interaction between gabapentin and adenosine in formalin-induced nociception at the spinal level. Male Sprague-Dawley rats were prepared for intrathecal catheterization. Pain was evoked by injection of formalin solution (5%, 50 microL) into the hindpaw. After examination of the e...

Adenosine nucleosidase (adenosine ribohydrolase, EC 3.2.2.7) which catalyzes the deribosylation of N(6)-(Delta(2)-isopentenyl)adenosine and adenosine to form the corresponding bases was partially purified from wheat germ. This enzyme (molecular weight 59,000 +/- 3,000) deribosylates the ribonucleosides at an optimum pH of 4.7 K(m) values for the cytokinin nucleoside and adenosine are 2.38 and 1...

background in spite of recent advents, and novel improvements in the diagnosis and treatment of pulmonary tuberculosis (tb), definitive diagnosis of pulmonary tb in children is problematic. therefore, measurement of the serum level of adenosine deaminase (ada) was later introduced as a helpful marker for the diagnosis of tb. objectives the purpose of this study was to determine the usefulness o...

There is a growing body of evidence suggesting that the neuromodulator adenosine is involved in drug addiction and withdrawal and that adenosine signaling pathways may offer new targets for therapeutic treatments of addiction. Recent studies have suggested that chronic exposure to drugs of abuse may alter adenosine metabolism in the nucleus accumbens, a brain region critically involved in drug ...

Abstract Background Adenosine signaling is now an accepted explanation for the therapeutic mechanism of Methotrexate (MTX) in rheumatoid arthritis (RA). receptors categorized into four subclasses: adenosine A1 receptor (ADORA1), 2a (ADORA2a), 2b (ADORA2B), and 3 (ADORA3). Our aim to check mRNA expression two receptors; ADORA2a ADORA3 whole blood cell RA patients its relation prediction MTX clin...

Previously, we have reported that the coronary reactive hyperemic response was reduced in adenosine A2A receptor-null (A2AAR?/?) mice, and it reversed by soluble epoxide hydrolase (sEH) inhibitor. However, is unknown aortic vascular response, therefore, hypothesized A2AAR-gene deletion mice affects adenosine-induced increase sEH A1 receptor (A1AR) activities. A2AAR?/? showed an sEH, AI AR CYP45...

Adenosine deaminase (ADA) can aid in the diagnosis of tuberculous pleural effusions, but false-positive findings from lymphocytic effusions have been reported. The purpose of this study is to assess the ADA levels in nontuberculous lymphocytic pleural effusions (lymphocyte count > 50%) of different aetiologies. Altogether, 410 nontuberculous lymphocytic pleural fluid samples were consecutively ...