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Clinical Trial Summary

Liver is the most common site of metastases from colorectal cancer. Neoadjuvant chemotherapy with targeted agents is usually recommended for borderline-resectable liver metastases that are technically difficult to resect for conversion to resectable disease and control of metastatic spread. However, the prognosis of these patients are still poor, and long term disease-free survival over 3 years is rare and <20%. More effective measures to prevent recurrence are needed before or after resection of colorectal liver metastases.


Clinical Trial Description

- Atezolizumab is a humanized immunoglobulin G1 monoclonal antibody that targets Programmed Death-Ligand 1(PD-L1) and inhibits the interaction between PD-L1 and its receptors, Programmed cell Death protein 1(PD-1) and B7.1. Therapeutic blockade of PD-L1 binding by atezolizumab has been shown to enhance the magnitude and quality of tumor specific T cell responses, resulting in improved anti tumor activity. - Bevacizumab is a recombinant, humanized therapeutic antibody directed against vascular endothelial growth factor(VEGF). In addition to its well-characterized role in angiogenesis, VEGF is also believed to be involved in cancer immune evasion via the induction of myeloid- derived suppressor cells(MDSCs). These VEGF-induced MDSCs can suppress both T-cell and dendritic-cell function. Bevacizumab can restore and/or maintain the antigen presentation capacity of dendritic cells, leading to enhanced T-cell infiltration in tumors. When used in combination, VEGF targeting agents such as bevacizumab promote the normalization of tumor vasculature and may thereby increase access of therapeutic agents. - Atezolizumab with bevacizumab, levoleucovorin, oxaliplatin, and 5-fluorouracil(FOLFOX). A translational study for renal cell carcinoma showed bevacizumab resulted in modulation of tumor immune microenvironment with Th1-related signatures, which was more potentiated by subsequent treatment with atezolizumab. This suggests potentiation of anti-tumor immunity with the combination of bevacizumab and atezolizumab. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT03698461
Study type Interventional
Source Asan Medical Center
Contact
Status Completed
Phase Phase 2
Start date May 15, 2019
Completion date October 24, 2023

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