Abstract
Purpose
Lung metastasis is the main cause of death in patients with colorectal carcinoma (CRC). Angiotensin II has been confirmed to facilitate cancer cell progression and metastasis. In this study, the possible anti-metastatic effects of an angiotensin II receptor type 1 (AT1R) antagonist, valsartan, have been investigated in an experimental CRC lung metastasis model.
Methods
An animal CRC lung metastasis model was used, involving intravenous injection of CRC cells. The experimental groups included (1) control group; (2) 5-FU (5-fluorouracil) group (5 mg/kg/every other day; ip); (3) valsartan group (40 mg/kg/day; po); and (4) valsartan + 5-FU group (combination group; valsartan 40 mg/kg/day, oral gavage, and 5-FU 5 mg/kg/every other day; ip). After 11 days, macroscopic and histological evaluations of lung tissues have been done for evaluation of lung metastatic nodules. In addition, inflammatory and angiogenic markers and oxidative stress index were measured in lung tissue.
Results
Our results showed that administration of valsartan especially in combination with 5-FU significantly reduced lung metastatic nodule and metastatic area (p < 0.05) in macroscopic and histological evaluations stained by hematoxylin–eosin. Measurement of inflammatory, angiogenic, and oxidative/antioxidative markers in lung tissue indicated that the level of IL-6, angiogenic markers (VEGF and VEGFR-1), and antioxidative markers significantly reduced in combination group (p < 0.05) while the MDA as a marker of oxidative stress increased (p < 0.05).
Conclusion
These results suggest that valsartan in combination with standard chemotherapeutic agents can have a synergistic effect in treatment of lung metastasis of CRC.
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Data Availability
The datasets during and/or analyzed during the current study are available from the corresponding author on reasonable request.
Code Availability
Not applicable.
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This study was supported by grants awarded by the Mashhad University of Medical Sciences.
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All of the experiments were conducted in accordance with Mashhad University of Medical Science guidelines for animal experiments, and the Local Committee for Experiments with Laboratory Animals in Mashhad, Iran, gave their approval.
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Fereshteh Asgharzadeh and Niloufar Naghibzadeh equally contributed as first author to this study.
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Asgharzadeh, F., Naghibzadeh, N., Hashemzehi, M. et al. Angiotensin II Receptor Antagonist, Valsartan, Has Beneficial Effect in Lung Metastasis of Colorectal Cancer Treated with Fluorouracil. J Gastrointest Canc 54, 126–134 (2023). https://doi.org/10.1007/s12029-021-00717-8
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DOI: https://doi.org/10.1007/s12029-021-00717-8