TY - JOUR
T1 - Properties of benzodiazepine binding sites in peripheral blood lymphocytes
AU - Garau, L.
AU - Memo, M.
AU - Pizzi, M.
AU - Missale, C.
AU - Carai, M. A M
AU - Boi, W.
AU - Ennas, M. G.
AU - Manconi, P. E.
AU - Spano, P. F.
PY - 1989
Y1 - 1989
N2 - Benzodiazepine (BDZ) binding sites were studied by using 3H-diazepam and 3H-Ro 5-4864 in intact lymphocytes from peripheral blood (PBL), in comparison to kidney and cerebellum. Experiments with 3H-diazepam performed at equilibrium and measuring kinetics revealed that BDZ binding sites are indeed present in rat PBL. The binding is saturable (Bmax 557 fmoles/106 cells), with high affinity (KD = 9.3 nM) and reversible. Specific binding sites are also observed by saturation experiments with 3H-Ro 5-4864 (Bmax 175 fmoles/106 cells, KD 2.2 nM). In addition, analysis of saturation isotherms obtained with 3H-diazepam indicates that BDZ binding sites are also present in human PBL. Scatchard plot of binding isotherms revealed an apparent single population of sites in all cases. The pharmacological characterization of BDZ binding sites in PBL, as compared with those of kidney and cerebellum, showed that these sites belong to the so-called 'peripheral type.'
AB - Benzodiazepine (BDZ) binding sites were studied by using 3H-diazepam and 3H-Ro 5-4864 in intact lymphocytes from peripheral blood (PBL), in comparison to kidney and cerebellum. Experiments with 3H-diazepam performed at equilibrium and measuring kinetics revealed that BDZ binding sites are indeed present in rat PBL. The binding is saturable (Bmax 557 fmoles/106 cells), with high affinity (KD = 9.3 nM) and reversible. Specific binding sites are also observed by saturation experiments with 3H-Ro 5-4864 (Bmax 175 fmoles/106 cells, KD 2.2 nM). In addition, analysis of saturation isotherms obtained with 3H-diazepam indicates that BDZ binding sites are also present in human PBL. Scatchard plot of binding isotherms revealed an apparent single population of sites in all cases. The pharmacological characterization of BDZ binding sites in PBL, as compared with those of kidney and cerebellum, showed that these sites belong to the so-called 'peripheral type.'
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U2 - 10.1002/jcla.1860030603
DO - 10.1002/jcla.1860030603
M3 - Article
C2 - 2559177
AN - SCOPUS:0024783156
VL - 3
SP - 332
EP - 336
JO - Journal of Clinical Laboratory Analysis
JF - Journal of Clinical Laboratory Analysis
SN - 0887-8013
IS - 6
ER -