title: Differences in expression of toll-like receptors and their reactivities in dendritic cells in BALB/c and C57BL/6 mice.
abstract: We have previously reported that differences in early production of interleukin 12 (IL-12) by dendritic cells (DC) underlies the difference between the susceptibilities to Listeria monocytogenes of C57BL/6 and BALB/c mice. To elucidate mechanisms for the different abilities of DC to produce cytokine in C57BL/6 and BALB/c mice, we examined Toll-like receptor (TLR) expression by DC and their responses in vitro to known microbial ligands for TLRs. We found that DC isolated from the spleens of naive C57BL/6 mice preferentially expressed TLR9 mRNA, whereas DC from naive BALB/c mice strongly expressed TLR2, -4, -5, and -6 mRNAs. C57BL/6 DC produced a higher level of IL-12p40 in response to the ligands for TLR4 (lipopolysaccharide), TLR2 (lipoprotein), and TLR9 (CpG), whereas BALB/c DC responded to these ligands by producing a larger amount of monocyte chemoattractant protein 1. C57BL/6 DC expressed higher levels of CD40 and Stat4 than BALB/c DC did, suggesting that naive C57BL/6 mice contained more-mature subsets of DC than naive BALB/c mice. Differences in reactivities of DC to microbial molecules through TLRs may be associated with susceptibility and resistance to Listeria infection in BALB/c and C57BL/6 mice.
authors.affiliation: Laboratory of Host Defense, Research Institute for Disease Mechanism and Control, Nagoya University Graduate School of Medicine, Japan.
authors.forename: Tie
authors.initials: T
authors.lastname: Liu
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Matsuguchi
authors.forename: Naotake
authors.initials: N
authors.lastname: Tsuboi
authors.forename: Toshiki
authors.initials: T
authors.lastname: Yajima
authors.forename: Yasunobu
authors.initials: Y
authors.lastname: Yoshikai
mesh_terms: D000818:Animals; D003713:Dendritic Cells / Q000276:immunology* / Q000378:metabolism; D004198:Disease Susceptibility; D029721:Drosophila Proteins; D008089:Listeria monocytogenes / Q000378:metabolism / Q000472:pathogenicity*; D008088:Listeriosis / Q000276:immunology* / Q000382:microbiology; D008297:Male; D008562:Membrane Glycoproteins / Q000235:genetics / Q000378:metabolism*; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D011956:Receptors, Cell Surface / Q000235:genetics / Q000378:metabolism*; D013045:Species Specificity; D013154:Spleen / Q000166:cytology / Q000276:immunology; D051195:Toll-Like Receptor 2; D051197:Toll-Like Receptor 4; D051193:Toll-Like Receptors
chemical_list: D029721:Drosophila Proteins; D008562:Membrane Glycoproteins; D011956:Receptors, Cell Surface; D051195:Toll-Like Receptor 2; D051197:Toll-Like Receptor 4; D051193:Toll-Like Receptors