Immunohistochemical staining of CHI3L1 protein in the lung of inflammation-induced tumor mice.

A) Immunohistochemical staining in the lungs of doxycycline-treated or untreated CCSP-rtTA/(TetO)7-CMV-Stat3C mice; B) Immunohistochemical staining of tumor regions in the lungs of doxycycline-treated CCSP-rtTA/(TetO)7-CMV-MMP12 mice, c-fms-rtTA/(TetO)7-CMV-MMP12 mice, and c-fms-rtTA/(TetO)7-CMV-Api6 mice. -Dox: doxycycline-untreated mice; +Dox: doxycycline-treated mice.