Angiogenesis of liver metastases: role of sinusoidal endothelial cells.
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| Title: | Angiogenesis of liver metastases: role of sinusoidal endothelial cells. |
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| Authors: | Gervaz, P., Scholl, B., Mainguene, C., Poitry, S., Gillet, M., Wexner, S. |
| Publication Year: | 2025 |
| Collection: | Université de Lausanne (UNIL): Serval - Serveur académique lausannois |
| Subject Terms: | Animals, Colorectal Neoplasms/pathology, Endothelium, Vascular/pathology, Vascular/physiopathology, Immunohistochemistry, Liver Neoplasms/blood supply, Liver Neoplasms/pathology, Male, Microscopy, Fluorescence, Neovascularization, Pathologic, Rats, Inbred Strains, Tumor Cells, Cultured |
| Description: | PURPOSE: Tumor-induced angiogenesis requires migration and remodeling of endothelial cells derived from pre-existing blood vessels. Vascular endothelial growth factor is the growth factor most closely implicated in the development of neovessels in colon cancer. However, vascular endothelial growth factor-specific receptors flt-1 and KDR mRNA expression are absent in normal sinusoid vessels surrounding vascular endothelial growth factor-producing secondary hepatic tumors. Thus, the potential role of sinusoidal endothelial cells in the mechanism of neovessel formation within liver metastatic carcinomas remains unclear. The purpose of this study was to determine whether sinusoidal endothelial cells are involved in tumor angiogenesis in a syngeneic model of liver metastases from colorectal cancer. METHODS: Sinusoidal endothelial cells were identified by fluorescence microscopy after uptake of acetylated low density lipoprotein labeled with a fluorescent probe (dioctadecylindocarbocyanine). One hundred microliters of dioctadecylindocarbocyanine acetylated low density lipoprotein were injected intraportally at the start of experiment in BD IX rats. Two days later, intraportal injection of 10(7) DHD K12, a chemically induced colon carcinoma cell line, was performed in syngeneic BD IX rats. Animals were killed one week later and the livers were processed for routine histologic examination and immunohistochemistry using the rat endothelial cell antigen-1 monoclonal antibody. RESULTS: In normal parenchyma fluorescence was associated with sinusoidal cells but not with endothelium of large blood vessels. Thus, specific acetylated low density lipoprotein uptake allowed histological differentiation of sinusoidal endothelial cells from other large-vessel endothelial cells present in the hepatic parenchyma. In tumor-bearing liver a spatial gradient of fluorescence was generated. Labeled cells accumulated at the periphery of the metastases. When tumors grow beyond 200 microm, neovessel formation was observed; there was an ... |
| Document Type: | article in journal/newspaper |
| Language: | English |
| ISSN: | 0012-3706 10910247 |
| Relation: | Diseases of the Colon & Rectum; https://iris.unil.ch/handle/iris/43990; serval:BIB_16133; 000088173900022 |
| Availability: | https://iris.unil.ch/handle/iris/43990 |
| Accession Number: | edsbas.9B288CCC |
| Database: | BASE |
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