Comparison of [125I]Iodolysergic Acid Diethylamide Binding in Human Frontal Cortex and Platelet Tissue
Comparison of [125I]Iodolysergic Acid Diethylamide Binding in Human Frontal Cortex and Platelet Tissue
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[125I]碘麦角酸二乙酰胺在人额叶皮质和血小板组织中结合的比较
DOI:
10.1111/j.1471-4159.1989.tb07313.x
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发表时间:
1989
影响因子:
4.7
通讯作者:
Amanda Kent
中科院分区:
文献类型:
--
作者:
J. Elliott;Amanda Kent
Abstract: The human platelet contains a functional 5‐hy‐droxytryptamine (5‐HT) receptor that appears to resemble the 5‐HT2 subtype. In this study, we have used the iodinated derivative [I25I]iodolysergic acid diethylamide ([I25I]iodoLSD) in an attempt to label 5‐HT receptors in human platelet and frontal cortex membranes under identical assay conditions to compare the sites labelled in these two tissues. In human frontal cortex, [125I]iodoLSD labelled a single high‐affinity site (KD= 0.35 ± 0.02 nM). Displacement of specific [l25I]iodoLSD binding indicated a typical 5‐HT2 receptor inhibition profile, which demonstrated a significant linear correlation (r= 0.97, p > 0.001, n = 17) with that observed using [3H]ketanserin. However, [125I]iodoLSD (Bmax= 136 ± 7 fmol/mg of protein) labelled significantly fewer sites than [3H]ketanserin (Bmax= 258 ± 19 fmol/mg of protein) (p > 0.001, n = 6). In human platelet membranes, [125I]iodoLSD labelled a single site with affinity (KD= 0.37 ± 0.03 nM) similar to that in frontal cortex. The inhibition profile in the platelet showed significant correlation with that in frontal cortex (r.= 0.96, p > 0.001, n = 16). We conclude that the site labelled by [125I]iodoLSD in human platelet membranes is biochemically similar to that in frontal cortex and most closely resembles the 5‐HT2 receptor subtype, although the discrepancy in binding capacities of [125I]iodoLSD and [3H]ketanserin raises a question about the absolute nature of this receptor.
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影响因子:
--
作者:
Mann,JJ;Stanley,M;McBride,PA;McEwen,BS
通讯作者:
McEwen,BS
DOI:
--
发表时间:
1983
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Moretti-Rojas,I;Ezrailson,EG;Birnbaumer,L;Entman,ML;Garber,AJ
通讯作者:
Garber,AJ
影响因子:
5
作者:
Titeler,M;Herrick,K;Lyon,RA;McKenney,JD;Glennon,RA
通讯作者:
Glennon,RA
影响因子:
6.1
作者:
McBride,PA;Mann,JJ;McEwen,B;Biegon,A
通讯作者:
Biegon,A
影响因子:
6.1
作者:
McBride,PA;Mann,JJ;Polley,MJ;Wiley,AJ;Sweeney,JA
通讯作者:
Sweeney,JA