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Intestinal dysbiosis mediates experimental autoimmune pancreatitis via activation of plasmacytoid dendritic cells.
International Immunology ( IF 4.4 ) Pub Date : 2019-11-08 , DOI: 10.1093/intimm/dxz050
Ken Kamata 1 , Tomohiro Watanabe 1 , Kosuke Minaga 1 , Akane Hara 1 , Tomoe Yoshikawa 1 , Ayana Okamoto 1 , Kentaro Yamao 1 , Mamoru Takenaka 1 , Ah-Mee Park 2 , Masatoshi Kudo 1
Affiliation  

Autoimmune pancreatitis (AIP) is a pancreatic manifestation of a newly proposed disease entity, IgG4-related disease (IgG4-RD), characterized by enhanced IgG4 antibody responses and involvement of multiple organs. We have previously reported that innate immune activation contributes to the development of AIP and IgG4-RD, as these diseases are characterized by the production of IFN-α and IL-33 by plasmacytoid dendritic cells (pDCs) that mediate chronic fibroinflammatory responses. In this study, we investigated the roles played by innate immunity against intestinal microflora in experimental AIP induced in MRL/MpJ mice by repeated administrations of 100 µg of polyinosinic-polycytidylic acid [poly (I:C)]. Bowel sterilization with a broad spectrum of antibiotics inhibited pancreatic accumulation of pDCs producing IFN-α and IL-33, and thereby suppressed the development of AIP. Mice treated with 10 µg of poly (I:C) developed severe AIP equivalent to that induced by 100 µg of poly (I:C) upon co-housing with mice treated with 100 µg of poly (I:C). Fecal microbiota transplantation (FMT) from donor mice treated with 100 µg of poly (I:C) led to the development of severe AIP in the recipient mice upon injection with 10 µg of poly (I:C). Induction of severe AIP in mice with 10 µg of poly (I:C) was associated with pancreatic accumulation of pDCs producing IFN-α and IL-33 in the co-housing and FMT experiments. These data collectively suggest that innate immune responses against intestinal microflora are involved in the development of experimental AIP, and that intestinal dysbiosis increases sensitivity to experimental AIP via activation of pDCs.

中文翻译:

肠营养不良通过浆细胞样树突状细胞的活化介导实验性自身免疫性胰腺炎。

自身免疫性胰腺炎(AIP)是新近提出的疾病实体IgG4相关疾病(IgG4-RD)的胰腺表现,其特征是IgG4抗体应答增强和多个器官受累。我们以前曾报道过,先天性免疫激活有助于AIP和IgG4-RD的发展,因为这些疾病的特征是通过介导慢性纤维炎性反应的浆细胞样树突状细胞(pDC)产生IFN-α和IL-33。在这项研究中,我们研究了通过反复施用100 µg聚肌苷酸-聚胞苷酸[poly(I:C)]对MRL / MpJ小鼠诱导的实验性AIP中针对肠道菌群的先天免疫所起的作用。用多种抗生素进行肠道消毒可抑制胰腺中产生IFN-α和IL-33的pDC积累,从而抑制了AIP的发展。用10 µg聚(I:C)处理的小鼠与用100 µg聚(I:C)处理的小鼠共存时,其严重AIP相当于由100 µg聚(I:C)诱导的小鼠。用100 µg聚(I:C)处理的供体小鼠的粪便菌群移植(FMT)导致,在注射10 µg聚(I:C)的小鼠体内产生严重的AIP。在共同居住和FMT实验中,用10 µg聚(I:C)诱导的小鼠严重AIP与产生IFN-α和IL-33的pDC的胰腺蓄积有关。这些数据共同表明,针对肠道菌群的先天免疫应答参与了实验性AIP的发展,肠道营养不良通过激活pDCs增加了对实验性AIP的敏感性。用10 µg聚(I:C)处理的小鼠与用100 µg聚(I:C)处理的小鼠共存时,其严重AIP相当于由100 µg聚(I:C)诱导的小鼠。用100 µg聚(I:C)处理的供体小鼠的粪便菌群移植(FMT)导致,在注射10 µg聚(I:C)的小鼠体内产生严重的AIP。在共同居住和FMT实验中,用10 µg聚(I:C)诱导的小鼠严重AIP与产生IFN-α和IL-33的pDC的胰腺蓄积有关。这些数据共同表明,针对肠道菌群的先天免疫应答参与了实验性AIP的发展,肠道营养不良通过激活pDCs增加了对实验性AIP的敏感性。用10 µg聚(I:C)处理的小鼠与用100 µg聚(I:C)处理的小鼠共存时,其严重AIP相当于由100 µg聚(I:C)诱导的小鼠。用100 µg聚(I:C)处理的供体小鼠的粪便菌群移植(FMT)导致,在注射10 µg聚(I:C)的小鼠体内产生严重的AIP。在共同居住和FMT实验中,用10 µg聚(I:C)诱导的小鼠严重AIP与产生IFN-α和IL-33的pDC的胰腺蓄积有关。这些数据共同表明,针对肠道菌群的先天免疫应答参与了实验性AIP的发展,肠道营养不良通过激活pDCs增加了对实验性AIP的敏感性。C)与用100 µg聚(I:C)处理的小鼠共栖时,共产生了与100 µg聚(I:C)诱导的重度AIP。用100 µg聚(I:C)处理的供体小鼠的粪便菌群移植(FMT)导致,在注射10 µg聚(I:C)的小鼠体内产生严重的AIP。在共同居住和FMT实验中,用10 µg聚(I:C)诱导的小鼠严重AIP与产生IFN-α和IL-33的pDC的胰腺蓄积有关。这些数据共同表明,针对肠道菌群的先天免疫应答参与了实验性AIP的发展,肠道营养不良通过激活pDCs增加了对实验性AIP的敏感性。C)与用100 µg聚(I:C)处理的小鼠共栖时,共产生了与100 µg聚(I:C)诱导的重度AIP。用100 µg聚(I:C)处理的供体小鼠的粪便菌群移植(FMT)导致,在注射10 µg聚(I:C)的小鼠体内产生严重的AIP。在共同居住和FMT实验中,用10 µg聚(I:C)诱导的小鼠严重AIP与产生IFN-α和IL-33的pDC的胰腺蓄积有关。这些数据共同表明,针对肠道菌群的先天免疫应答参与了实验性AIP的发展,肠道营养不良通过激活pDCs增加了对实验性AIP的敏感性。用100 µg聚(I:C)处理的供体小鼠的粪便菌群移植(FMT)导致,在注射10 µg聚(I:C)的小鼠体内产生严重的AIP。在共同居住和FMT实验中,用10 µg聚(I:C)诱导的小鼠严重AIP与产生IFN-α和IL-33的pDC的胰腺蓄积有关。这些数据共同表明,针对肠道菌群的先天免疫应答参与了实验性AIP的发展,肠道营养不良通过激活pDCs增加了对实验性AIP的敏感性。用100 µg聚(I:C)处理的供体小鼠的粪便菌群移植(FMT)导致,在注射10 µg聚(I:C)的小鼠体内产生严重的AIP。在共同居住和FMT实验中,用10 µg聚(I:C)诱导的小鼠严重AIP与产生IFN-α和IL-33的pDC的胰腺蓄积有关。这些数据共同表明,针对肠道菌群的先天免疫应答参与了实验性AIP的发展,肠道营养不良通过激活pDCs增加了对实验性AIP的敏感性。C)与共同居住和FMT实验中产生IFN-α和IL-33的pDC的胰腺蓄积有关。这些数据共同表明,针对肠道菌群的先天免疫应答参与了实验性AIP的发展,肠道营养不良通过激活pDCs增加了对实验性AIP的敏感性。C)与共同居住和FMT实验中产生IFN-α和IL-33的pDC的胰腺蓄积有关。这些数据共同表明,针对肠道菌群的先天免疫应答参与了实验性AIP的发展,肠道营养不良通过激活pDCs增加了对实验性AIP的敏感性。
更新日期:2019-11-01
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