The present invention relates to a method for detection of receptor antagonists comprising the following steps: (I) a sample containing the receptor antagonist is fractionated by use of a liquid-based separation means, preferably capillary electrophoresis, (II) a fraction containing the receptor antagonist or modulator is fed directly to a biosensor (9) which is activated by an appropriate receptor agonist and, as a result of this activation, is generating a measurable response, said agonist being fed to the biosensor through the liquid-based separation means together with the antagonist or modulator, said activation of the biosensor (
9
) being pulsed by delivery of the receptor agonist to the biosensor for short period of times, said periods being separated by other periods when no agonist is delivered to the biosensor, and (III) the change of the response resulting from deactivation of the receptor agonist-activated biosensor by the receptor antagonist or modulator is measured, preferably by means of a patch clamp electrode (
8
).
It is further possible to resensitize the biosensor desensitized as above by use of pulsed superfusion of the biosensor.
The present invention also relates to an apparatus usable for practicing the above mentioned method.
本发明涉及一种检测受体拮抗剂的方法,包括以下步骤:(I)使用液基分离手段,最好是毛细管电泳,将含有受体拮抗剂的样品分馏;(II)将含有受体拮抗剂或调节剂的样品直接送入
生物传感器(9),该
生物传感器被适当的受体激动剂激活,并由于这种激活而产生可测量的反应,所述激动剂与拮抗剂或调节剂一起通过液基分离手段送入
生物传感器,所述激活
生物传感器(
9
(III) 受体拮抗剂或调节剂使受体激动剂激活的
生物传感器失活后产生的反应的变化,最好通过膜片钳电极(
8
).
此外,还可以通过对
生物传感器进行脉冲超灌,使如上所述脱敏的
生物传感器重新敏化。
本发明还涉及一种可用于实施上述方法的装置。