Leukemia inhibitory factor in follicular fluid is not related to the number and quality of embryos as well as implantation and pregnancy rates

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Title:	Leukemia inhibitory factor in follicular fluid is not related to the number and quality of embryos as well as implantation and pregnancy rates
Authors:	Hsieh, YY;Chang, CC;Tsai, HD;Lin, CS
Contributors:	附設醫院婦產部;Natl Chiao Tung Univ, Dept Biol Sci & Technol, Hsinchu, Taiwan;China Med Coll Hosp, Dept Obstet & Gynecol, Taichung, Taiwan
Date:	2005
Issue Date:	2010-09-24 14:49:37 (UTC+8)
Publisher:	SPRINGER/PLENUM PUBLISHERS
Abstract:	Rat neutrophils express the mRNA encoding for transient receptor potential (TRP) V1. However, capsaicin-stimulated [Ca2+](i) elevation occurred only at high concentrations (>= 100 mu M). This response was substantially decreased in a Ca2+-free medium. Vanilloids displayed similar patterns of Ca2+ response with the rank order of potency as follows: scutigeral > resiniferatoxin > capsazepine > capsaicin=olvanil > isovelleral. Arachidonyl dopamine (AAD), an endogenous ligand for TRPV1, failed to desensitize the subsequent capsaicin challenge. Capsaicin-induced Ca2+ response was not affected by 8-bromo-cyclic ADP-ribose (8-Br-cADPR), the ryanodine receptor blocker, but was slightly attenuated by 1-[6-[17 beta-3-methoxyestra-1,3,5(10)-trien-17-yl]amino]hexyl]-1H-pyrrole-2,5-dione (U-73122), the inhibitor of phospholipase C-coupled processes, 1-[beta-[3-(4-methoxyphenyl)propoxy]-4-methoxyphenethyl]-1H-imidazole (SKF-96365), the blocker of receptor-gated and store-operated Ca2+ (SOC) channels, 2-aminoethyldiphenyl borate (2-APB), the blocker of D-myo-inositol 1,4,5-trisphospahte (IP3) receptor and Ca2+ influx, and by ruthenium red, a blocker of TRPV channels, and enhanced by the Ca2+ channels blocker, cis-N-(2-phenylcyclopentyl)azacyclotridec-1-en-2-amine (MDL-12330A) and Na+-deprivation. In addition, capsaicin had no effect on the plasma membrane Ca2+-ATPase activity or the production of nitric oxide (NO) and reactive oxygen intenmediates (ROI) or on the total thiols content. Capsaicin (>= 100 mu M) inhibited the cyclopiazonic acid (CPA)-induced store-operated Ca2+ entry (SOCE). In the absence of external Ca2+ the robust Ca2+ entry after subsequent addition of Ca2+ was decreased by capsaicin in CPA-activated cells. capsaicin alone increased the actin cytoskeleton, and also increased the actin filament content in cell activation with CPA. These results indicate that capsaicin activates a TRPV1-independent non-SOCE pathway in neutrophils. The reorganization of the actin cytoskeleton is probably involved in the capsaicin inhibition of SOCE. (c) 2005 Elsevier Inc. All rights reserved.
Relation:	BIOCHEMICAL GENETICS 43(9月10日):501-506
Appears in Collections:	[China Medical University Hospital] Jurnal articles

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