293XL/hTLR7-HA Unit size Cat. code Docs Qty Price
293XL cell line expressing the HA-tagged human TLR7 gene
3-7 x 10e6 cells

293XL/hTLR7-HA cells were obtained by stable transfection of HEK293XL cells with the pUNO-hTLR7-HA plasmid which expresses the human TLR7 gene fused at the 3'end to the influenza hemaglutinine (HA).

The control cell line for 293XL/hTLR7-HA cells is 293XL/null cells.

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Antibiotic resistance: blasticidin

Growth medium: DMEM, 4.5 g/l glucose, 2-4 mM L-glutamine, 10% (v/v) fetal bovine serum, 50 U/ml penicillin, 50 μg/ml streptomycin, 100 μg/ml Normocin™

Guaranteed mycoplasma-free

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Shipped on dry ice

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TLR7, which is abundantly expressed in lung, placenta, spleen and PBL, is phylogenetically close to TLR8 and TLR9 [1]. TLR7 recognizes small synthetic molecules such as loxoribine and R848, an imidazoquinoline compound [2]. TLR7 signaling involves the MyD88-dependent signaling cascade and induces the production of IFN-α, TNF-α and IL-12. Recently, single-stranded RNA (ssRNA) was identified as the natural ligand of TLR7 [3, 4]. ssRNA derived from HIV-1 or the influenza virus were shown to induce the production of proinflammatory cytokines in PDC. TLR7 signaling is abrogated by chloroquine indicating that it is dependent on endosomal acidification.


1. Chuang TH. and RJ. Ulevitch, 2000. Cloning and characterization of a sub-family of human toll-like receptors: hTLR7, hTLR8 and hTLR9. Eur Cytokine Netw, 11(3):372-8
2. Hemmi H. et al., 2002. Small anti-viral compounds activate immune cells via the TLR7 MyD88-dependent signaling pathway. Nat Immunol, 3(2):196-200
3. Heil F. et al., 2004. Species-specific recognition of single-stranded RNA via toll-like receptor 7 and 8. Science. 303(5663):1526-9.
4. Diebold SS. et al., 2004. Innate antiviral responses by means of TLR7-mediated recognition of single-stranded RNA. Science. 303(5663):1529-31.

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