Clinical trial NCT04862949: Organ-specific Responses to Atezolizumab Plus Bevacizumab in Advanced HCC
Official title: Organ-specific Responses to Atezolizumab Plus Bevacizumab in Patients With Advanced Hepatocellular Carcinoma
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Advanced Hepatocellular Carcinoma
Keywords: Hepatocellular carcinoma, atezolizumab, bevacizumab
Lead sponsor: CHA University
Sponsor class: OTHER
Collaborators: name: Hoffmann-La Roche
First posted: 2021-04-28
Enrollment: 124
Sex: ALL
Minimum age (years): 19
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Observational model: COHORT
Time perspective: RETROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: Patients enrollment was performed in the CHA Bundang Medical Center, Ulsan University Hospital and Chinese University of Hong Kong

Brief summary: Hepatocellular carcinoma (HCC) is one of the most frequent causes of cancer-related deaths globally and in Korea. Many patients diagnosed at advanced stage, and systemic therapy is mainstay of treatment in patients with advanced HCC.

However, immune-checkpoint inhibitor (ICI) monotherapy did not significantly improve overall survival in phase III studies. According to previous retrospective analyses, ICI treatment in advanced HCC showed different organ-specific responses. The intrahepatic HCC was the least responsive organ to ICI treatment. The failure of phase III trials of ICI monotherapy may have been attributed to different organ-specific response pattern of ICIs.

Combination of atezolizumab plus bevacizumab is expected to overcome the immunosuppressive microenvironment of liver and may enhance intrahepatic response of ICI.

Detailed description: In a previous retrospective analysis of pembrolizumab treated patients with advanced melanoma and NSCLC, patients with liver metastases showed poorer PFS compared with those without liver metastases with reduced ORR. Similar observations have also been reported in metastatic of triple-negative breast cancer patients, there were no responses in patients with liver metastases. Taken together the results of previous studies, hepatic metastases had reduced response to ICI compared with metastases at other organs, regardless of cancer types.

In addition, ICI treatment in advanced HCC showed different organ-specific responses. The poorer response rate in liver to ICI might be affected by liver-specific immunosuppressive microenvironment (TME). To overcome the unfavorable immunosuppressive TME of the liver, combination strategies are needed to achieve enhanced anti-tumor immune responses or alleviated tumor-associated immunosuppression.

Since the cause of death in most HCC patients was hepatic failure due to intrahepatic HCC or underlying liver cirrhosis, the response rate to ICI of intrahepatic tumor lesions is a crucial factor in determining the overall prognosis of advanced HCC.

Therefore, we hypothesize that combination strategy of atezolizumab plus bevacizumab may increase organ specific response in patients with advanced HCC, and may improve survival outcomes accordingly.

Objectives We hypothesize that combination strategy of atezolizumab plus bevacizumab may increase organ specific response in patients with advanced HCC, and may improve survival outcomes accordingly.

Eligibility criteria: Inclusion Criteria:

* Confirmed HCC pathological or non-invasive assessment according to American Association for the Study of Liver Diseases (AASLD) criteria
* ECOG performance status 0 or 1
* Patients who received Atezolizumab and Bevacizumab combination therapy as first-line systemic treatment for unresectable HCC
* Barcelona Clinic Liver Cancer (BCLC) stage B or C
* Child-Pugh class A
* Measurable lesion
* Adequate hematologic and organ function

Exclusion Criteria:

* History of autoimmune disease
* Concomitant anticoagulation at therapeutic doses. Low dose aspirin for
* cardio protection is permitted.

Primary outcomes:
measure: Organ-specific response rate
timeFrame: 1 year
Secondary outcomes:
Other outcomes:
Locations:
city: Seongnam-si
country: Korea, Republic of
facility: Cha Medical Center
state: Gyeonggi-do
Study officials:
affiliation: CHA University
name: Hong Jae Chon, MD, PhD
role: PRINCIPAL_INVESTIGATOR
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