Abstract：
:Toll-like receptor 7 (TLR7) senses microbial-derived RNA but can also potentially respond to self-derived RNA. To prevent autoimmune responses, TLR7 is thought to localize in endolysosomes. Contrary to this view, we show here that TLR7 is present on the cell surface of immune cells and that TLR7 responses can be inhibited by an anti-TLR7 antibody. The anti-TLR7 antibody is internalized with TLR7 and accumulates in endolysosomes as an immune complex. TLR7 responses in dendritic cells, macrophages and B cells are all inhibited by the anti-TLR7 antibody. Furthermore, the anti-TLR7 antibody inhibits in vivo cytokine production induced by a TLR7 ligand. Spontaneous TLR7 activation in Unc93b1(D34A/D34A) mice causes lethal inflammation. Progressive inflammation such as splenomegaly, thrombocytopenia and chronic active hepatitis are ameliorated by anti-TLR7 antibody treatment. These results demonstrate that cell surface TLR7 is a promising target for therapeutic intervention in autoimmune diseases.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Kanno A,Tanimura N,Ishizaki M,Ohko K,Motoi Y,Onji M,Fukui R,Shimozato T,Yamamoto K,Shibata T,Sano S,Sugahara-Tobinai A,Takai T,Ohto U,Shimizu T,Saitoh S,Miyake Kdoi
10.1038/ncomms7119subject
Has Abstractpub_date
2015-02-04 00:00:00pages
6119issn
2041-1723pii
ncomms7119journal_volume
6pub_type
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