近日,,來自布里格姆婦女醫(yī)院(BWH)移植研究中心的研究者Xian Chang Li博士通過研究揭示了淋巴細(xì)胞CD4+ T細(xì)胞如何發(fā)育成為成熟T細(xì)胞輔助細(xì)胞的不同小分子亞集,。研究小組同時(shí)也揭示了細(xì)胞表面分子OX40是T細(xì)胞輔助細(xì)胞強(qiáng)有力的誘導(dǎo)劑,體外環(huán)境中,,T細(xì)胞輔助細(xì)胞可以產(chǎn)生大量的白細(xì)胞介素9(IL-9)(這種T細(xì)胞稱為TH9細(xì)胞),,在機(jī)體內(nèi),TH9細(xì)胞對(duì)發(fā)生中的炎癥可以產(chǎn)生明顯的效應(yīng),。
相關(guān)研究成果刊登在了7月29日的國際雜志Nature Immunology上,。
研究中,研究者發(fā)現(xiàn)高活性O(shè)X40的小鼠存在組織炎癥標(biāo)志,,這些組織中大量的細(xì)胞,,大約有30%的細(xì)胞都為粘蛋白生成細(xì)胞,可以產(chǎn)生膠樣的分泌物,,當(dāng)結(jié)合其它的分泌物后可以形成粘液或者唾液,。
研究結(jié)果也反襯出了以前的研究(在肺氣道高表達(dá)IL-9),研究結(jié)果證實(shí)OX40可以引發(fā)TH9和IL-9的產(chǎn)生,,從而誘導(dǎo)炎癥發(fā)生,。
這些研究發(fā)現(xiàn)對(duì)于如何治療慢性炎癥,如過敏性炎癥和慢性同種異體移植物排斥等可以提供一些新的思路和簡(jiǎn)介,。后期研究者將進(jìn)行深入研究來理解OX40在誘導(dǎo)TH9細(xì)胞中所扮演的角色以及其作用的分子機(jī)制,。
研究者最后表示,OX40可以通過TRAF6(介導(dǎo)信號(hào)轉(zhuǎn)導(dǎo)的一種蛋白質(zhì))來促進(jìn)TH9細(xì)胞的產(chǎn)生,,非經(jīng)典的NF-kB途徑將為治療TH9相關(guān)的疾病提供新的思路,。(生物谷Bioon.com)
編譯自:Cell Receptor Has Proclivity for T Helper 9 Cells, Airway Inflammation
doi:10.1038/ni.2390
PMC:
PMID:
OX40 signaling favors the induction of TH9 cells and airway inflammation
Xiang Xiao,1 Savithri Balasubramanian,2 Wentao Liu,1 Xiufeng Chu,1 Haibin Wang,3 Elizabeth J Taparowsky,4 Yang-Xin Fu,5 Yongwon Choi,6 Matthew C Walsh6 & Xian Chang Li1
The mechanisms that regulate the TH9 subset of helper T cells and diseases mediated by TH9 cells remain poorly defined. Here we found that the costimulatory receptor OX40 was a powerful inducer of TH9 cells in vitro and TH9 cell–dependent airway inflammation in vivo. In polarizing conditions based on transforming growth factor-β (TGF-β), ligation of OX40 inhibited the production of induced regulatory T cells and the TH17 subset of helper T cells and diverted CD4+Foxp3− T cells to a TH9 phenotype. Mechanistically, OX40 activated the ubiquitin ligase TRAF6, which triggered induction of the kinase NIK in CD4+ T cells and the noncanonical transcription factor NF-κB pathway; this subsequently led to the generation of TH9 cells. Thus, our study identifies a previously unknown mechanism for the induction of TH9 cells and may have important clinical implications in allergic inflammation.