Academic Journal
Inhibition of store-operated Ca2+ entry channels and K+ channels by caffeic acid phenethylester in T lymphocytes
| Title: | Inhibition of store-operated Ca2+ entry channels and K+ channels by caffeic acid phenethylester in T lymphocytes |
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| Authors: | Joo Hyun, Nam, Dong Hoon, Shin, Haifeng, Zheng, Jae Seung, Kang, Woo Kyung, Kim, Sung Joon, Kim |
| Contributors: | Joo Hyun Nam, Dong Hoon Shin, Haifeng Zheng, Jae Seung Kang, Woo Kyung Kim, Sung Joon Kim, Nam, Joo Hyun |
| Source: | European Journal of Pharmacology. 612:153-160 |
| Publisher Information: | Elsevier BV, 2009. |
| Publication Year: | 2009 |
| Subject Terms: | 0301 basic medicine, Potassium Channels, Time Factors, Patch-Clamp Techniques, K+ channel, CD3 Complex, Inositol 1,4,5-Trisphosphate, Kidney, Calcium/antagonists & inhibitors, Jurkat Cells, Egtazic Acid, Chelating Agents, 0303 health sciences, Ionomycin, Phenylethyl Alcohol, Kidney/cytology, Phytohemagglutinins/pharmacology, 3. Good health, Electrophysiology, Caffeic Acids/pharmacology, Potassium Channels, Voltage-Gated, Calcium Signaling/drug effects, Egtazic Acid/pharmacology, CD28 Antigens/metabolism, Drug, T-Lymphocytes/metabolism, Ca2+-release activated Ca2+ channel, Interleukin-2/antagonists & inhibitors, Inositol 1,4,5-Trisphosphate/metabolism, Cell Line, Dose-Response Relationship, 03 medical and health sciences, Caffeic Acids, CD28 Antigens, Caffeic acid phenethyl ester, Humans, Phenylethyl Alcohol/pharmacology, Thapsigargin/pharmacology, Calcium Signaling, Phytohemagglutinins, Ca2+ signaling, Caffeic acid, Phenylethyl Alcohol/analogs & derivatives, Dose-Response Relationship, Drug, Ionomycin/pharmacology, Voltage-Gated/antagonists & inhibitors, T cell, CD3 Complex/metabolism, Interleukin-2, Calcium, Chelating Agents/pharmacology |
| Description: | The increase of cytoplasmic Ca2+ concentration (Delta[Ca2+]c) in response to antigenic stimulation is a critical step of signals activating immune responses. In addition, the voltage-gated K+ channels (Kv) in T lymphocytes draw attention as an effective target of immune-modulation. Caffeic acid phenethyl ester (CAPE), an active component of propolis, shows strong anti-inflammatory effects and T cell suppression. Although various mechanisms have been suggested for the action of CAPE, the effects of CAPE on intracellular Ca2+ signaling and ion channels are unknown. Here we investigated the effects of CAPE on Delta[Ca2+](c), Ca2+-release activated Ca2+ current (I(CRAC)), and Kv current (I(Kv)) in Jurkat T cells, and on Ca2+-activated K+ channel current (I(SK4)) overexpressed in HEK-293 cells. I(CRAC) was induced by dialyzing T cells and Orai1/STIM1 overexpressing HEK293 cells with InsP(3)/BAPTA-containing pipette solution. CAPE concentration-dependently decreased both T cell receptor (CD3)- and thapsigargin-induced Delta[Ca2+](c). The phosphorylation of PLCgamma(1) by CD3 stimulation was not affected by CAPE. I(CRAC) was almost completely blocked by 25 microM CAPE. CAPE also inhibited the I(Kv) and I(SK4). Albeit the strong inhibition of Ca2+ influx via CRAC, the suppression of IL-2 secretion by CAPE was similarly observed in human peripheral T cells when the CRAC pathway was circumvented by ionomycin. Although the unspecific inhibition of ion channels by CAPE suggested an intriguing mechanism, the effects of CAPE on signaling pathways other than I(CRAC) seem to play dominant roles in the immunomodulation by CAPE. |
| Document Type: | Article |
| File Description: | 153~160 |
| Language: | English |
| ISSN: | 0014-2999 |
| DOI: | 10.1016/j.ejphar.2009.04.004 |
| Access URL: | https://pubmed.ncbi.nlm.nih.gov/19371740 |
| Rights: | Elsevier TDM CC BY NC ND |
| Accession Number: | edsair.doi.dedup.....a1fbf9d763016a1f9c6e0db1af0c08bb |
| Database: | OpenAIRE |
| ISSN: | 00142999 |
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| DOI: | 10.1016/j.ejphar.2009.04.004 |