@misc{furlani_hmgb1_induces_2012, author={Furlani, D.,Donndorf, P.,Westien, I.,Ugurlucan, M.,Pittermann, E.,Wang, W.,Li, W.,Vollmar, B.,Steinhoff, G.,Kaminski, A.,Ma, N.}, title={HMGB-1 induces c-kit plus cell microvascular rolling and adhesion via both toll-like receptor-2 and toll-like receptor-4 of endothelial cells}, year={2012}, howpublished = {journal article}, doi = {https://doi.org/10.1111/j.1582-4934.2011.01381.x}, abstract = {High-mobility group box 1 (HMGB-1) is a strong chemo-attractive signal for both inflammatory and stem cells. The aim of this study is to evaluate the mechanisms regulating HMGB-1–mediated adhesion and rolling of c-kit+ cells and assess whether toll-like receptor-2 (TLR-2) and toll-like receptor-4 (TLR-4) of endothelial cells or c-kit+ cells are implicated in the activation of downstream migration signals to peripheral c-kit+ cells. Effects of HMGB-1 on the c-kit+ cells/endothelial interaction were evaluated by a cremaster muscle model in wild-type (WT), TLR-2 (−/−) and Tlr4 (LPS-del) mice. The mRNA and protein expression levels of endothelial nitric oxide synthase were determined by quantitative real-time PCR and immunofluorescence staining. Induction of crucial adhesion molecules for rolling and adhesion of stem cells and leukocytes were monitored in vivo and in vitro. Following local HMGB-1 administration, a significant increase in cell rolling was detected (32.4 ± 7.1% in ‘WT’ versus 9.9 ± 3.2% in ‘control’, P < 0.05). The number of firmly adherent c-kit+ cells was more than 13-fold higher than that of the control group (14.6 ± 5.1 cells/mm2 in ‘WT’ versus 1.1 ± 1.0 cells/mm2 in ‘control’, P < 0.05). In knockout animals, the fraction of rolling cells did not differ significantly from control levels. Firm endothelial adhesion was significantly reduced in TLR-2 (−/−) and Tlr4 (LPS-del) mice compared to WT mice (1.5 ± 1.4 cells/mm2 in ‘TLR-2 (−/−)’ and 2.4 ± 1.4 cells/mm2 in ‘Tlr4 (LPS-del)’ versus 14.6 ± 5.1 cells/mm2 in ‘WT’, P < 0.05). TLR-2 (−/−) and Tlr4 (LPS-del) stem cells in WT mice did not show significant reduction in rolling and adhesion compared to WT cells. HMGB-1 mediates c-kit+ cell recruitment via endothelial TLR-2 and TLR-4.}, note = {Online available at: \url{https://doi.org/10.1111/j.1582-4934.2011.01381.x} (DOI). Furlani, D.; Donndorf, P.; Westien, I.; Ugurlucan, M.; Pittermann, E.; Wang, W.; Li, W.; Vollmar, B.; Steinhoff, G.; Kaminski, A.; Ma, N.: HMGB-1 induces c-kit plus cell microvascular rolling and adhesion via both toll-like receptor-2 and toll-like receptor-4 of endothelial cells. Journal of Cellular and Molecular Medicine. 2012. vol. 16, no. 5, 1094-1105. DOI: 10.1111/j.1582-4934.2011.01381.x}}