Abstract：
:In an attempt to investigate the role of nucleoside transporter function in the hypertensive state, we have compared the binding of [3H]nitrobenzylthioinosine ([3H]NBMPR), a nucleoside transporter probe, in membranes prepared from platelet, renal, pulmonary, cardiac and brain tissues of spontaneously hypertensive rats (SHR) to those of age-matched Wistar-Kyoto (WKY) controls. At 4 weeks of age, [( 3H]NBMPR) binding sites (Bmax) increased in the kidney of SHR but decreased in platelets, whereas no changes were found in the heart, lung or brain. At 18 weeks of age, [3H]NBMPR binding sites (Bmax) remained increased in the kidney and decreased in platelets with no changes in the other tissues. The only change in apparent binding affinity (KD) was an increase in the heart of SHR at 4 weeks. Age-dependent decreases were also observed in the heart and platelets of both SHR and WKY at 18 weeks. The results indicate that the changes in binding characteristics may be due to a combination of the pharmacodynamic differences between the strains, age, as well as to the pathogenesis of hypertension. Consequently, it cannot be concluded that the altered binding characteristics are the result of the elevated blood pressure.
journal_name
Life Scijournal_title
Life sciencesauthors
Williams EF,Udofia UP,Brooks GR,Hawk NNdoi
10.1016/0024-3205(90)90024-lsubject
Has Abstractpub_date
1990-01-01 00:00:00pages
1007-12issue
14eissn
0024-3205issn
1879-0631pii
0024-3205(90)90024-Ljournal_volume
46pub_type
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