Ectopic LT alpha beta directs lymphoid organ neogenesis with concomitant expression of peripheral node addressin and a HEV-restricted sulfotransferase.

Ectopic LT alpha beta directs lymphoid organ neogenesis with concomitant expression of peripheral node addressin and a HEV-restricted sulfotransferase.
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异位LT Alphaββ指导淋巴器官新生成,并具有外周节点地址和HEV限制的磺胺转移酶的表达。

DOI:
10.1084/jem.20021761
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发表时间:
2003-05-05
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Ruddle NH
Ruddle NH
中科院分区:
其他
文献类型:
--
作者:
Drayton DL;Ying X;Lee J;Lesslauer W;Ruddle NH

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淋巴结(LN)功能依赖于T和B细胞区室化、抗原呈递细胞和高内皮微静脉(HEV),其表达粘膜地址素细胞粘附分子(MAdCAM-1)和外周淋巴结地址素(PNAd),幼稚细胞进入LN的配体。管腔PNAd表达需要HEV限制性磺基转移酶(HEC-6ST)。为了研究LTαβ在淋巴器官发生中的活性,将在大鼠胰岛素启动子II(RIP)控制下同时表达LTα和LTβ的小鼠与淋巴新生模型中的RIPLTα小鼠和LTβ−/−小鼠进行了比较。RIPLTαβ胰腺表现出大量胰岛内单核细胞浸润,与RIPLTα胰腺中更稀疏的胰岛周围细胞积聚不同:分离成T和B细胞区域更明显,具有突出的FDC网络,淋巴趋化因子(CCL 21、CCL 19和CXCL 13)的表达更强烈,L-选择素+细胞更频繁。与LTβ−/− MLN和RIPLTα胰腺浸润中HEV的主要近腔PNAd模式相反,PNAd在野生型LN和RIPLTαβ胰腺中表达于HEV的腔和近腔方面,与HEC-6ST一致。这些数据强调了LTα和LTαβ在淋巴器官发生中的不同作用,支持HEC-6ST依赖性管腔PNAd受LTαβ调节的观点。
Lymph node (LN) function depends on T and B cell compartmentalization, antigen presenting cells, and high endothelial venules (HEVs) expressing mucosal addressin cell adhesion molecule (MAdCAM-1) and peripheral node addressin (PNAd), ligands for naive cell entrance into LNs. Luminal PNAd expression requires a HEV-restricted sulfotransferase (HEC-6ST). To investigate LTαβ's activities in lymphoid organogenesis, mice simultaneously expressing LTα and LTβ under rat insulin promoter II (RIP) control were compared with RIPLTα mice in a model of lymphoid neogenesis and with LTβ−/− mice. RIPLTαβ pancreata exhibited massive intra-islet mononuclear infiltrates that differed from the more sparse peri-islet cell accumulations in RIPLTα pancreata: separation into T and B cell areas was more distinct with prominent FDC networks, expression of lymphoid chemokines (CCL21, CCL19, and CXCL13) was more intense, and L-selectin+ cells were more frequent. In contrast to the predominant abluminal PNAd pattern of HEV in LTβ−/− MLN and RIPLTα pancreatic infiltrates, PNAd was expressed at the luminal and abluminal aspects of HEV in wild-type LN and in RIPLTαβ pancreata, coincident with HEC-6ST. These data highlight distinct roles of LTα and LTαβ in lymphoid organogenesis supporting the notion that HEC-6ST–dependent luminal PNAd is under regulation by LTαβ.
DOI: 10.1016/s1074-7613(02)00423-5
发表时间: 2002-10-01
期刊: IMMUNITY
影响因子: 32.4
作者:
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