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- W998545542 abstract "Methylxanthines (MXs), used in the treatment of neonatal apnea, stimulate respiration and heart rate. The xanthine analog, 8-cyclopentyl-1,3-dipropylxanthine (DPCPX), has a high affinity for adenosine A1 receptors in the brain. It is proposed that this selective adenosine A1 antagonist can stimulate respiration in neonates without some of the unwanted side effects caused by MXs. The effects of DPCPX on heart rate and respiration were tested in unanesthetized 4- to 7-day-old rats. Heart rates were determined by recording the electrocardiogram (ECG) using mini-electrodes on gently restrained rats. A separate group of rats were placed in a body plethysmograph for recording of respiration using a pneumotachograph. After a 10-min control period, each rat was given a s.c. dose of DPCPX (80, 160, 320, or 640 μg/kg) or saline. ECG or respiration was recorded continuously for the next hour and measurements were made at 5-min intervals. DPCPX produced dose-related increases in heart rate, respiratory rate, minute ventilation, and mean inspiratory flow. It is concluded that selective antagonism of adenosine A1 receptors contributes to both cardiac and respiratory stimulation in newborn rats. Supported by EIU Council on Faculty Research and Honors College." @default.
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- W998545542 date "2011-04-01" @default.
- W998545542 modified "2023-09-23" @default.
- W998545542 title "Effects of 8‐cyclopentyl‐1,3‐dipropylxanthine on heart rate and respiration in newborn rats" @default.
- W998545542 doi "https://doi.org/10.1096/fasebj.25.1_supplement.1077.3" @default.
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