首页> 外文期刊>Autoimmunity >Presence of B7-2+ dendritic cells and expression of Th1 cytokines in the early development of sialodacryoadenitis in the IqI/Jic mouse model of primary Sjorgren's syndrome.
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Presence of B7-2+ dendritic cells and expression of Th1 cytokines in the early development of sialodacryoadenitis in the IqI/Jic mouse model of primary Sjorgren's syndrome.

机译:在Sjorgren's综合征的IqI / Jic小鼠模型中,唾液泪腺炎的早期发展过程中B7-2 +树突状细胞的存在和Th1细胞因子的表达。

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摘要

Subpopulations of infiltrating lymphocytes, professional antigen-presenting cells (APCs), and Th1/Th2 cytokines that could initiate an autoimmune sialodacryoadenitis were studied in the IQI/Jic mouse model of primary Sjogren's syndrome. Although lymphocytic infiltrations were first seen in submandibular glands (SMGs) of females and in lacrimal glands (LGs) of males at 8 weeks of age, clusters of MHC class II+, CD11c+, B7-2+ dendritic cells (DCs) were already localized in these tissues at 4 weeks. At 8 weeks, the infiltrating lymphocytes consisted of almost equal numbers of B cells and CD4+ T cells. In the inflammatory foci, MHC class II+, CD11c+, B7-2+ DCs formed network-like structures. Duct cells in the lesions showed immunoreactivities for MHC class II and ALCAM (a costimulatory adhesion molecule). IL-12 and IFN-gamma transcripts were detected by RT-PCR in SMGs of females and in LGs of males at 8-12 weeks. These results suggest that the clustered DCs might play an important role in the initiation ofthe adenitis, and further suggest that the DCs and epithelial cells may participate in the activation of CD4+ T cells. It is also likely that Th1 cytokines mediate the functional interactions between the APCs and CD4+ T cells in the early lesions.
机译:在原发性干燥综合征的IQI / Jic小鼠模型中,研究了可引发自身免疫性唾液泪腺腺炎的浸润淋巴细胞,专业抗原呈递细胞(APC)和Th1 / Th2细胞因子亚群。尽管在8周龄时首次在女性的下颌下腺(SMG)和男性的泪腺(LG)中发现淋巴细胞浸润,但MHC II +,CD11c +,B7-2 +树突状细胞(DC)的簇已经定位于这些组织在第4周。在第8周时,浸润的淋巴细胞由几乎相等数量的B细胞和CD4 + T细胞组成。在炎性灶中,II类MHC,CD11c +,B7-2 + DC形成网络状结构。病变中的导管细胞对II类MHC和ALCAM(一种共刺激粘附分子)具有免疫反应性。通过RT-PCR在8-12周时在女性的SMG和男性的LG中检测到IL-12和IFN-γ转录物。这些结果表明聚集的DC可能在腺炎的发生中起重要作用,并且进一步表明DC和上皮细胞可能参与CD4 + T细胞的活化。 Th1细胞因子也可能介导早期病变中APC和CD4 + T细胞之间的功能相互作用。

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