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Clinical Trial Summary

There have been lack of clinical studies on the role of drug treatment in patients who develop progressive disease with immune checkpoint inhibitors. Amongst HCC patients who become intolerant or refractory to sorafenib, cabozantinib has been shown by phase III clinical trial (CELESTIAL) to prolong the overall survival of patients, as compared to placebo. It is expected more patients will be treated with immune checkpoint inhibitors in future, hence it is clinically important to study the efficacy and toxicity of cabozantinib after treatment with immune checkpoint inhibitors. Further, both MET activation and upregulation of regulatory T cells are implicated in resistance mechanism to immune checkpoint inhibitors. Immuno-modulatory effects of cabozantinib have been described in vitro and in murine models for several cancers. Moreover, cabozantinib appears to exert its effect on regulatory T cells (Tregs) via the HGF/c-Met pathway, where this receptor signaling cascade mediates multiple immune cell functions. HGF was shown to suppress DC function and in turn induce Tregs (CD4+ CD25+ FoxP3) in a murine central nervous system (CNS) autoimmunity model. HGF cultured monocytes differentiate into monocytic cells that produce soluble factors that favor immune suppressive conditions ideal for tumor progression. Above immunomodulatory effects could enable cabozantinib to reverse the immunosuppressive phenotype in patients after failure with immune checkpoint inhibitors. The starting dose of cabozantinib of 60mg once daily in the current study is chosen in accordance with approved dose by FDA for treatment of advanced HCC


Clinical Trial Description

n/a


Study Design


Related Conditions & MeSH terms


NCT number NCT04588051
Study type Interventional
Source Chinese University of Hong Kong
Contact
Status Active, not recruiting
Phase Phase 2
Start date November 1, 2020
Completion date December 31, 2027

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