Lymphangiogenesis occurs during renal fibrosis in patients with chronic kidney diseases and vascular endothelial growth factor (VEGF)-C is required for the formation of Lymphatic vessels; however, the underlying mechanisms remain unclear. We demonstrate that macrophages can regulate unilateral ureteral obstruction (UUO)-induced renal lymphangiogenesis by expressing high levels of VEGF-C by C-C motif chemokine receptor 2 (CCR2)-mediated signaling. Mice deficient in Ccr2 manifested repressed lymphangiogenesis along with attenuated renal injury and fibrosis after UUO induction. The infiltrated macrophages after UUO induction generated a microenvironment in favor of lymphangiogenesis, which likely depended on Ccr2 expression. Mechanistic studies revealed that CCR2 is required for macrophages to activate phosphatidylinositol 3-kinase (PI3K)-AKT-mechanistic target of rapamycin (mTOR) signaling in response to its ligand monocyte chemoattractant protein 1 stimulation, whereas hypoxia-inducible factor (HIF)-1 alpha is downstream of PI3K-AKT-mTOR signaling. HIF-1 alpha directly bound to the VEGF-C promoter to drive its expression to enhance lymphangiogenesis. Collectively, we characterized a novel regulatory network in macrophages, in which CCR2 activates PI3K-AKT-mTOR signaling to mediate HIF-1 alpha expression, which then drives VEGF-C expression to promote lymphangiogenesis.
基金:
National Natural Science Foundation of China [81530024, 81471046, 81500637, 81470988]; Program Project for Type 1 Diabetes from the Chinese Ministry of Science Technology [2016YFC1305002]; Graduate School of Huazhong University of Science and Technology innovative research grant [0118650021]; Integrated Innovative Team for Major Human Disease Programs of Tongji Medical College, Huazhong University of Science Technology; Innovative Funding for Translational Research from Tongji Hospital
第一作者单位:[1]Minist Educ, Key Lab Organ Transplantat, Ctr Biomed Res, Wuhan, Peoples R China[2]Minist Hlth, Wuhan, Peoples R China[3]Tongji Hosp,Dept Neurol,Wuhan,Peoples R China
通讯作者:
通讯机构:[1]Minist Educ, Key Lab Organ Transplantat, Ctr Biomed Res, Wuhan, Peoples R China[2]Minist Hlth, Wuhan, Peoples R China[3]Tongji Hosp,Dept Neurol,Wuhan,Peoples R China[*1]Huazhong Univ Sci & Technol,Tongji Med Coll,Tongji Hosp,Ctr Biomed Res,1095 Jiefang Ave,Wuhan 430030,Peoples R China[*2]Huazhong Univ Sci & Technol,Tongji Med Coll,Tongji Hosp,Dept Nephrol,1095 Jiefang Ave,Wuhan 430030,Peoples R China
推荐引用方式(GB/T 7714):
Guo Yan-Chao,Zhang Meng,Wang Fa-Xi,et al.Macrophages Regulate Unilateral Ureteral obstruction-Induced Renal Lymphangiogenesis through C-C Motif Chemokine Receptor 2-Dependent Phosphatidylinositol 3-Kinase-AKT-Mechanistic Target of Rapamycin Signaling and Hypoxia-Inducible Factor-1α/Vascular Endothelial Growth Factor-C Expression[J].AMERICAN JOURNAL OF PATHOLOGY.2017,187(8):1736-1749.doi:10.1016/j.ajpath.2017.04.007.
APA:
Guo, Yan-Chao,Zhang, Meng,Wang, Fa-Xi,Pei, Guang-Chang,Sun, Fei...&Wang, Cong-Yi.(2017).Macrophages Regulate Unilateral Ureteral obstruction-Induced Renal Lymphangiogenesis through C-C Motif Chemokine Receptor 2-Dependent Phosphatidylinositol 3-Kinase-AKT-Mechanistic Target of Rapamycin Signaling and Hypoxia-Inducible Factor-1α/Vascular Endothelial Growth Factor-C Expression.AMERICAN JOURNAL OF PATHOLOGY,187,(8)
MLA:
Guo, Yan-Chao,et al."Macrophages Regulate Unilateral Ureteral obstruction-Induced Renal Lymphangiogenesis through C-C Motif Chemokine Receptor 2-Dependent Phosphatidylinositol 3-Kinase-AKT-Mechanistic Target of Rapamycin Signaling and Hypoxia-Inducible Factor-1α/Vascular Endothelial Growth Factor-C Expression".AMERICAN JOURNAL OF PATHOLOGY 187..8(2017):1736-1749