Epidermal growth factor receptor inhibition by erlotinib prevents vascular smooth muscle cell and monocyte-macrophage function in vitro

Transplant Immunology
Johanna SavikkoP Koskinen

Abstract

Vascular smooth muscle cells (VSMCs) and monocyte-macrophages play a central role during the development of chronic allograft injury, which still remains an important challenge in organ transplantation. Inflammation, fibrosis and accelerated arteriosclerosis are typical features for chronic allograft injury. Growth factors participate in cell proliferation, differentiation and migration in this pathological process. Here we studied the role of epidermal growth factor receptor (EGFR) in VSMC and monocyte-macrophage function in vitro. EGFR inhibition by erlotinib, a selective EGF tyrosine kinase inhibitor, was studied in VSMC proliferation and migration as well as monocyte-macrophage proliferation and differentiation. Rat coronary artery SMCs were used for VSMC studies. As a model for monocyte-macrophage proliferation and differentiation human monocytic cell line U937 was used. Phorbol ester TPA was used to induce these cells to differentiate into macrophages. Platelet-derived growth factor (PDGF)-B, a known VSMC inducer, caused 2.1-fold stimulation in VSMC proliferation compared to non-stimulated VSMC. Erlotinib prevented this VSMC proliferation in a dose-dependent manner, p < 0.001 in all groups compared to controls. PDGF-B sti...Continue Reading

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Dec 19, 2015·Cancer Cell·Lorenzo GalluzziGuido Kroemer
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Apr 30, 2021·Journal of Thoracic Oncology : Official Publication of the International Association for the Study of Lung Cancer·Meng QiaoCaicun Zhou

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