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2.白三烯E4 通过人肥大细胞激活过氧化物酶体增殖激活受体γ和诱导前列腺素D2产生 7.在疼痛性外周神经病变的大鼠用全身糖皮质激素治疗可以减少疼痛和神经内膜肿瘤坏死因子阳性肥大细胞的数量 8.肥大细胞过敏信号研究进展:过敏大鼠模型中组织胺相关基因表达上调 |
欢迎各位免疫学专业教师和研究生加入到翻译志愿者的行列! |
| 肥大细胞--免疫应答中关键的效应细胞 | |||
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王媛 译 宋向凤 审校 新乡医学院免疫学教研室 河南新乡 453003
------------------------- TRENDS in Immunology Vol.28 No.5
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| 白三烯E4 通过人肥大细胞激活过氧化物酶体增殖激活受体γ和诱导前列腺素D2产生 | |||
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Paruchuri S, Jiang Y, Feng
C, Francis SA, Plutzky J, Boyce JA.
Cysteinyl leukotrienes (cys-LTs) are potent
inflammatory lipid mediators, of which leukotriene (LT) E4 is the most
stable and abundant in vivo. Although only a weak agonist of established
G protein coupled receptors (GPCRs) for cys-LTs, LTE4 potentiates airway
hyperresponsiveness (AHR) by a cyclooxygenase (COX)-dependent mechanism
and induces bronchial eosinophilia. We now report that LTE4 activates
human mast cells (MCs) by a pathway involving cooperation between an
MK571-sensitive GPCR and peroxisome proliferator activated receptor
(PPAR)gamma, a nuclear receptor for dietary lipids. Although LTD4 is
more potent than LTE4 for inducing calcium flux by the human MC sarcoma
line LAD2, LTE4 is more potent for inducing proliferation and chemokine
generation, and is at least as potent for upregulating COX-2 expression
and causing prostaglandin D2 (PGD2) generation. LTE4 caused phosphorylation
of extracellular signal regulated kinase (ERK), p90RSK, and cyclic AMP-regulated
binding protein (CREB). ERK activation in response to LTE4, but not
to LTD4, was resistant to inhibitors of phosphoinositol 3-kinase. LTE4-mediated
COX-2 induction, PGD2 generation, and ERK phosphorylation were all sensitive
to interference by the PPAR gamma antagonist GW9662 and to targeted
knockdown of PPAR gamma. Although LTE4-mediated PGD2 production was
also sensitive to MK571, an antagonist for the type 1 receptor for cys-LTs
(CysLT1R), it was resistant to knock-down of this receptor. This LTE4-selective
receptor-mediated pathway may explain the unique physiologic responses
of human airways to LTE4 in vivo. --------------------- J Biol Chem. 2008 Apr 14
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| 免疫细胞外核苷酸的趋化作用 |
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Daniel Myrtek and
Marco Idzko
------------------------------ Purinergic Signal. 2007 March; 3(1): 5–11.
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| 妇女子宫内膜炎能选择性上调大麻素受体CB2的表达 | |||
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------------------------------------ J Cell Mol Med. 2008 Apr;12(2):661-670
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| 肥大细胞转录因子网络 | |||
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Takemoto CM, Lee YN,
Jegga AG,et al.
--------------- Blood Cells Mol Dis. 2008 Apr 10 |
| 在皮肤固有免疫系统中肥大细胞的功能 | |||
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Metz M, Siebenhaar F, Maurer
M.
--------------------- Immunobiology. 2008;213(3-4):251-60 |
| 在疼痛性外周神经病变的大鼠用全身糖皮质激素治疗可以减少疼痛和神经内膜肿瘤坏死因子阳性肥大细胞的数量 | |||
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Hayashi R, Xiao W, Kawamoto
M,et al .
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| 肥大细胞过敏信号研究进展:过敏大鼠模型中组织胺相关基因表达上调 | |||
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Hiroyuki Fukui
Brown Norway allergy model rats sensitized to toluene 2,4-diisocyanate (TDI) were developed. Histamine H1 receptor mRNA level was elevated in nasal mucosa of allergy model rats after the provocation with TDI, which was followed by H1-receptor up-regulation. Elevation of histamine H1 receptor mRNA was partially suppressed by d-chlorpheniramine and olopatadine, antihistamines. Histamine induced increase in histamine H1 receptor gene expression in vitro, and the protein kinase C-δ isoform was suggested to mediate the gene expression. On the other hand, elevation of histamine H1 receptor mRNA was completely suppressed by dexamethasone in allergy model rats. Provocation with TDI also induced mRNA elevation of histidine decarboxylase, a sole histamine-forming enzyme, followed by the increase of both HDC activity and histamine content in nasal mucosa of allergy model rats. HDC mRNA elevation and increase in both HDC activity and histamine level were almost completely suppressed by dexamethasone. These observations suggest that histamine H1 receptor up-regulation and increase in histamine level play an important role in allergy through the regulation of histamine signaling.
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| 肥大细胞过敏信号研究进展:TLR4介导肥大细胞功能的改变调节过敏性呼吸道炎症 | |||
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Masakatsu Yamashita and
Toshinori Nakayama
In a mouse experimental asthma model, the administration of bacterial lipopolysaccharide (LPS), particularly at low doses, enhances the levels of ovalbumin (OVA)-induced eosinophilic airway inflammation. In an effort to clarify the cellular and molecular basis for the LPS effect, we demonstrate that the OVA-induced eosinophilic inflammation in the lung is dramatically increased by administration of LPS at the priming phase in wild-type mice, whereas such an increase was not observed in mast cell deficient mice. Adoptive transfer of bone marrow-derived mast cells (BMMC) from wild type but not from Toll-like receptor 4 (TLR4)-deficient mice restored the increased eosinophilic inflammation in mast cell–deficient mice. Moreover, in vitro analysis revealed that treatment of BMMC with LPS resulted in sustained up-regulation of GATA1 expression and increased production of Th2 cytokines (IL-4, IL-5, and IL-13) upon restimulation. Thus, mast cells appear to control allergic airway inflammation after their activation and modulation through TLR4-mediated induction of GATA1 proteins and subsequent increase in Th2 cytokine production.
Journal of Pharmacological Sciences |
| 肥大细胞过敏信号研究进展:过敏性疾病肥大细胞生物学 | |||
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Hirohisa Saito
At the end of the last century, microarray technology that examines the total genes and transcripts present in a cell became available as a laboratory tool. Mast cells are known to play a pivotal role in initiating allergic inflammation by releasing various mediators and cytokines. According to the recent microarray-based studies, mast cells have been found to be much more versatile functional molecules than we ever thought. Also, genes that are exclusively expressed in mast cells have been identified in comparison with other cell types. In this article, the outcome of microarray-based analyses on the role of mast cells in allergic inflammation will be reviewed by focusing on the mast cell–specific genes as drug targets.
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Journal of Pharmacological Sciences |
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