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Clinical Trial Summary

Hepatocellular carcinoma (HCC) is the third leading cause of cancer death worldwide. Treatment options for advanced HCC remain very limited. Until recently, multikinase inhibitor were the gold standard for advanced hepatocellular carcinoma but associated with poor outcome and important side effects. Recently, the positive results of the Imbrave 150 study (a randomized study comparing Atezolizumab + Bevacizumab versus Sorafenib) prompted us to redefine our management strategy for advanced hepatocellular carcinoma by proposing the combination of Atezolizumab/Bevacizumab as treatment first-line in patients with advanced hepatocellular carcinoma. However, only 1/3 of the patients will respond to the combination of treatment and identifying predictive factors of response and new immune checkpoint inhibitors in order to target more tumors appear as a major issue. In this context, recent work has underlined the importance of the activating CD226/DNAM-1 receptor as an original immunotherapeutic target in various cancers (solid and hematopoietic tumors). CD226 is a transmembrane receptor that is part of the immunoglobulin superfamily. It is expressed by most T lymphocytes (CD8+, CD4+), by Natural Killer (NK) cells, by promoting their cytotoxicity. The investigators propose to prospectively analyze the frequency and phenotype (expression of CD226) of circulating immune cells before the initiation of treatment with Atezolizumab/Bevacizumab, 3 weeks after the first injection and its variation to determine whether this biomarker could predict the response to the treatment.


Clinical Trial Description

It is now widely accepted that inflammation is an essential element in tumor development. Liver tissue is very sensitive to inflammation and harbors immune system effectors capable of preventing the onset of a chronic inflammatory response. However, in case of chronic liver diseases, chronic inflammation will favor fibrosis progression and tumor development. Hepatocellular carcinoma (HCC) is the third leading cause of cancer death worldwide. Treatment options for advanced HCC remain very limited. Until recently, multikinase inhibitor were the gold standard for advanced hepatocellular carcinoma but associated with poor outcome and important side effects. Recently, immune checkpoint inhibitors, have emerged as an innovative anti-tumor strategy to restore an anti-tumor immune response, as illustrated by recent positive results of immunotherapy in oncology with prolonged responses in some patients. The initial results of immunotherapy in advanced hepatocellular carcinoma as monotherapy have been disappointing. However, combinations of immunotherapy and anti-VEGF antibodies or between immunotherapy and tyrosine kinase inhibitors are currently being tested in order to potentiate the effect of immunotherapy and to obtain higher rates of anti-tumor response. Recently, the positive results of the Imbrave 150 study (a randomized study comparing Atezolizumab + Bevacizumab versus Sorafenib) prompted us to redefine our management strategy for advanced hepatocellular carcinoma by proposing the combination of Atezolizumab/Bevacizumab as treatment first-line in patients with advanced hepatocellular carcinoma. However, only 1/3 of the patients will respond to the combination of treatment and identifying predictive factors of response and new immune checkpoint inhibitors in order to target more tumors appear as a major issue. In this context, recent work has underlined the importance of the activating CD226/DNAM-1 receptor as an original immunotherapeutic target in various cancers (solid and hematopoietic tumors). CD226 is a transmembrane receptor that is part of the immunoglobulin superfamily. It is expressed by most T lymphocytes (CD8+, CD4+), by Natural Killer (NK) cells, by promoting their cytotoxicity. The ligands for CD226 are the molecules CD112 and CD155, which are overexpressed in many tumors and are associated with a poor prognosis for patients. Recent data show that the decrease in CD226 expression on the surface of anti-tumor-containing immune effectors may be associated with resistance to anti-PD1/PDL1 immunotherapies. To date, the involvement of CD226 and its ligands in liver tumorigenesis is completely unknown. The use of Atezolizumab/Bevacizumab in France is a unique opportunity to conduct a pilot study on clinical, biological, histological, molecular and immune prognostic and predictive factors in patients treated with the Atezolizumab/Bevacizumab combination. The investigators hypothese that a decrease in CD226 expression on the surface of CD8+ T lymphocytes (CTLs) and NK cells before the initiation of treatment with Atezolizumab/Bevacizumab could be associated with decrease response to the treatment and therefore associated with poor outcome of the patient. The investigators propose to prospectively analyze the frequency and phenotype (expression of CD226) of circulating immune cells before the initiation of treatment with Atezolizumab/ Bevacizumab, 3 weeks after the first injection (day of the second infusion) and its variation to determine whether this biomarker could predict the response to the treatment. The investigators will also perform an analysis of the histological and pathology characteristics of the tumor and non-tumor liver of the same patient before the initiation of treatment with Atezolizumab/ Bevacizumab with the ultimate objective of developing a predictive prognostic score for treatment response. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT05044676
Study type Observational
Source Assistance Publique - Hôpitaux de Paris
Contact Manon ALLAIRE, MD
Phone 01 42 16 10 34
Email manon.allaire@aphp.fr
Status Recruiting
Phase
Start date September 8, 2023
Completion date September 8, 2027

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