Modulation of P2X3 receptors by spider toxins
نویسندگان
چکیده
منابع مشابه
Use-dependent inhibition of P2X3 receptors by nanomolar agonist.
P2X3 receptors desensitize within 100 ms of channel activation, yet recovery from desensitization requires several minutes. The molecular basis for this slow rate of recovery is unknown. We designed experiments to test the hypothesis that this slow recovery is attributable to the high affinity (< 1 nM) of desensitized P2X3 receptors for agonist. We found that agonist binding to the desensitized...
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Objective(s) Nicotinic acetylcholine receptors (nAChRs) regulate epileptiform activity and produce a sustained pro-epileptogenic action within the hippocampal slices. In the present study, we investigated the effect of nAChRs on evoked glutamatergic synaptic transmission in area CA3 and CA1 of rat hippocampal slices to identify possible excitatory circuits through which activation of nAChRs pr...
متن کاملExperimental and modeling studies of desensitization of P2X3 receptors.
The function of ATP-activated P2X3 receptors involved in pain sensation is modulated by desensitization, a phenomenon poorly understood. The present study used patch-clamp recording from cultured rat or mouse sensory neurons and kinetic modeling to clarify the properties of P2X3 receptor desensitization. Two types of desensitization were observed, a fast process (t1/2 = 50 ms; 10 microM ATP) fo...
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ATP-gated P2X3 receptors are mostly expressed by nociceptive sensory neurons and participate in transduction of pain signals. P2X3 receptors show a combination of fast desensitization onset and slow recovery. Moreover, even low nanomolar agonist concentrations unable to evoke a response, can induce desensitization via a phenomenon called "high affinity desensitization." We have also observed th...
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ژورنال
عنوان ژورنال: Biochimica et Biophysica Acta (BBA) - Biomembranes
سال: 2012
ISSN: 0005-2736
DOI: 10.1016/j.bbamem.2012.07.016