Phosphorylation of residues in the C-terminal tail of the m-opioid receptor (MOPr) is thought to be a key step in desensitization and internalization. Phosphorylation of C-terminal S/T residues is required for internalization (Just et al., 2013), but its role in desensitization is unknown. This study examined the influence of C-terminal phosphorylation sites on rapid desensitization of MOPr. Wi...

GABA(A) receptor fast desensitization is thought to shape the time course of individual IPSCs. Although GABA(A) receptors also exhibit slower phases of desensitization, the possible role of slow desensitization in modifying synaptic function is poorly understood. In transiently transfected human embryonic kidney (HEK293T) cells, rat alpha1beta3delta and alpha1beta3gamma2L GABA(A) receptors show...

We report here that, contrary to previously reported findings, treatment of S49 wild-type (WT) lymphoma cells with 0-50 nM epinephrine resulted in a heterologous desensitization of adenylyl cyclase (EC 4.6.1.1)--that is, epinephrine and prostaglandin E1 (PGE1) stimulations of adenylyl cyclase were reduced. Observation of this heterologous desensitization required the assay of adenylyl cyclase w...

It is important to clarify developmental mechanisms of desensitization because of their great significance in regulation of cellular responsiveness. We have found that carbachol-induced desensitization to carbachol develops in three successive phases in the presence of extracellular Ca(2+) in the smooth muscle of guinea pig taenia caeci: fast desensitization within 15 s, transient resensitizati...

OBJECTIVE Administration of paclitaxel is associated with hypersensitivity reactions (HSRs) in up to 9% of patients despite premedication. The purpose of this study was to evaluate the effectiveness of a standardized desensitization protocol in patients with HSRs to taxanes, based on our experience with carboplatin desensitization. METHODS We analyzed seventeen consecutive patients with docum...

Postsynaptic receptor desensitization has been observed to contribute to depression in immature synapses. However, it is not clear whether desensitization persists and causes depression in mature synapses. We investigate this issue at the endbulb of Held, the synapse made by auditory nerve (AN) fibers onto bushy cells (BCs) of the anteroventral cochlear nucleus, where depression could influence...

Whole cell recordings from acutely isolated rat neocortical pyramidal cells were performed to study the kinetics and the mechanisms of short-term desensitization of G-protein-activated, inwardly rectifying K+ (GIRK) currents during prolonged application (5 min) of baclofen, adenosine, or serotonin. Most commonly, desensitization of GIRK currents was characterized by a biphasic time course with ...

BACKGROUND Aspirin desensitization is an effective therapy for moderate-to-severe aspirin-exacerbated respiratory disease (AERD). Desensitization also allows the use of aspirin for secondary cardiovascular prevention. OBJECTIVE We sought to investigate the cost-effectiveness of aspirin desensitization with subsequent aspirin therapy in patients with AERD. METHODS The Healthcare Cost and Uti...

The purpose of this study is to determine the correlations between servant leadership perceptions and organizational cynicism burnout levels personnel Ankara Directorate Provincial Agriculture Forestry. In March 2019, 300 employees had taken a survey within context. data from research been analyzed via SPSS program. study, t-test analysis was used examine leadership, according sex, marital stat...

Desensitization of cannabinoid receptor signaling by a G-protein coupled receptor kinase (GRK) was examined using the Xenopus oocyte expression system. Application of a CB1 agonist, WIN 55,212-2, evoked a concentration-dependent increase in K+ conductance (Kir3) in oocytes coexpressing rat CB1 with the G-protein-gated, inwardly rectifying K+ channels Kir3.1 and Kir3.4. Desensitization was sligh...