Clinical trial NCT06819566: Prophylactic Endoscopic Variceal Ligation in Patients With High-risk Esophageal Varices Receiving Atezo/Bev for HCC
Official title: Prophylactic Endoscopic Variceal Ligation in Patients With High-risk Esophageal Varices Receiving Atezolizumab Plus Bevacizumab for Hepatocellular Carcinoma : A Phase II, Multicenter, Single-arm Trial (ESCOAT Trial)
Study type: INTERVENTIONAL
Overall status: NOT_YET_RECRUITING
Phase: PHASE2
Conditions: Hepatocellular Carcinoma
Esophageal Varix
Bleeding Esophageal Varices
Keywords: Hepatocellular carcinoma
Esophageal varix
Bleeding esophageal varices
Endoscopic variceal ligation
Lead sponsor: Asan Medical Center
Sponsor class: OTHER
Collaborators: name: Seoul National University Hospital
name: Hanyang University
name: Samsung Medical Center
name: National Cancer Center, Korea
name: Seoul National University Bundang Hospital
First posted: 2025-02-11
Enrollment: 44
Sex: ALL
Minimum age (years): 19
Maximum age (years): 80
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Intervention model description: prophylactic EVL for high-risk esophageal varices
Primary purpose: TREATMENT

Brief summary: The goal of this study is to evaluate whether prophylactic endoscopic variceal ligation (EVL) can prevent esophageal variceal bleeding in patients with hepatocellular carcinoma (HCC) receiving atezolizumab and bevacizumab (Atezo/Bev) therapy. The study will also assess the safety of prophylactic EVL in this population.

The main question it aims to answer is:

Does prophylactic EVL in high-risk varices reduce the incidence of variceal bleeding to a level similar to that of low-risk varices in HCC patients receiving Atezo/Bev?

Participants will:

1. Undergo prophylactic EVL before starting Atezo/Bev therapy (within 2 weeks ± 1 week before the first dose).
2. Start Atezo/Bev therapy 2 weeks (± 1 week) after EVL.
3. Have follow-up endoscopies (EGD) one week after the 3rd, 5th, and 7th doses of Atezo/Bev.

If varices improve, no additional intervention is needed. If varices persist or worsen, on-demand EVL will be performed, and Atezo/Bev will continue.

This study will help determine if prophylactic EVL should be a standard strategy for managing high-risk varices in HCC patients undergoing Atezo/Bev therapy.

Detailed description: 1. Backgrounds Patients with hepatocellular carcinoma (HCC) undergoing treatment with atezolizumab plus bevacizumab (Atezo/Bev) are at a high risk of variceal bleeding. When bleeding occurs, it may necessitate treatment delays or permanent discontinuation of Atezo/Bev, potentially requiring a switch to alternative anticancer therapies that may be less effective. Additionally, variceal bleeding can result in hepatic decompensation, deteriorated liver function, and reduced quality of life.

   Prophylactic endoscopic variceal ligation (EVL) has been proposed as an approach to minimize the risk of variceal hemorrhage in patients with high-risk esophageal varices, as identified on screening endoscopy. By proactively treating high-risk varices before initiating Atezo/Bev, prophylactic EVL may optimize oncologic treatment continuity and overall patient outcomes.
2. Study aim

This Phase 2 study is designed to evaluate the efficacy and safety of prophylactic EVL in reducing variceal bleeding among HCC patients with high-risk esophageal varices undergoing Atezo/Bev therapy. In addition, this study aims to:

- Assess the impact of prophylactic EVL on patient survival and quality of life.

- Identify biomarkers associated with variceal bleeding risk and therapeutic response.

3. Study Design

1. Prophylactic EVL Procedure Prophylactic EVL will be performed within two weeks (± 1 week) before the initiation of Atezo/Bev therapy. The procedure will be conducted by board-certified gastroenterological endoscopists with expertise in therapeutic endoscopy.

   - EVL technique: Suctioning of esophageal varices until the red-out phenomenon occurs. Placement of a rubber band at the variceal base to induce thrombus formation, leading to subsequent necrosis and sloughing. The procedure begins at the distal esophageal varices and progresses spirally upward. Priority treatment will be given to varices with active bleeding or endoscopic signs of recent hemorrhage.
2. Follow-Up Endoscopy and Additional EVL Criteria Follow-up esophagogastroduodenoscopy (EGD) will be conducted one week after the 3rd dose of Atezo/Bev to assess variceal status.

   If any of the following criteria are met, additional EVL will not be performed, and Atezo/Bev therapy will continue two weeks later:
   * Varices have regressed to F1 or less
   * Red color signs have disappeared If these criteria are not met, an on-demand EVL session will be performed.
3. Further On-Demand EVL Strategy Additional on-demand EVL sessions will be considered after the 5th and 7th doses of Atezo/Bev, with EGD follow-up before each session.

The maximum number of EVL sessions will be limited to three during the study period.

Eligibility criteria: Inclusion Criteria:

* Patients aged 19 years or older and under 80 years.
* Patients with liver function are classified as Child-Pugh Class A.
* Barcelona Clinic Liver Cancer stage C patients with no prior systemic anticancer therapy for hepatocellular carcinoma.
* Patients with an Eastern Cooperative Oncology Group performance score of 0-1.
* Adequate Hematologic and Liver Function:

A. Hemoglobin: ≥ 9.0 g/dL B. Absolute Neutrophil Count : ≥ 1,000/mm³ C. Platelet Count: ≥ 70,000/μL D. Prothrombin Time: ≥ 70% (or Prothrombin Time INR ≤ 1.2)

* Patients with upper gastrointestinal endoscopy performed within six months prior to the start of anticancer treatment.
* No plans for breastfeeding, and if of childbearing potential, using contraception or no plans for spouse's pregnancy or practicing contraception.
* Patients who have received an explanation of the treatment purpose and methods and have provided informed consent for the treatment.

Exclusion Criteria:

* Participants who have previously received systemic anticancer therapy for advanced hepatocellular carcinoma.
* Patients with intrahepatic tumor involvement of 50% or more.
* Patients with tumor thrombus in the main portal vein or both first-order branches (Vp4).
* Patients with a prior history of liver transplantation.
* with uncontrolled malignant tumors other than HCC at the time of enrollment (participation is allowed if disease-free survival exceeds two years).
* Patients with uncontrolled or serious underlying diseases requiring treatment.
* Patients with a history of esophageal or gastric variceal bleeding.
* Previous Variceal Treatments: Patients who have undergone any of the following treatments for variceal bleeding:

A. Endoscopic Variceal Obliteration (EVO) B. EVL C. Transjugular Intrahepatic Portosystemic Shunt (TIPS) D. Percutaneous Approach for Retrograde Transvenous Obliteration (PARTO) E. Surgical procedures

* Patients who have used anticoagulants or antiplatelet agents within one week prior to the study.
* Presence of grade 2 or higher isolated gastric varices or Red Color Signs confirmed by baseline endoscopy (EGD).
* Patients who are pregnant.
* Patients who are unable to understand or provide written informed consent.
* Patients deemed unsuitable for clinical study participation based on the investigator's judgment.

Primary outcomes:
measure: The incidence of esophageal variceal bleeding at 6 months
timeFrame: From the first Atezo/Bev treatment date until the date of first esophageal varix bleeding, Atezo/Bev treatment discontinuation, or last follow-up, whichever came first, assessed up to 6 months
Secondary outcomes:
measure: Cumulative incidence of acute esophageal varix bleeding
timeFrame: from the date of the first Atezo/Bev treatment date until the date of first esophageal varix bleeding, the discontinuation of Atezo/Bev treatment or last follow-up, whichever came first, assessed up to 12 months
measure: Cumulative incidence of non-variceal GI bleeding
timeFrame: from the date of the first Atezo/Bev treatment date until the date of first non-variceal GI bleeding, the discontinuation of Atezo/Bev treatment or last follow-up, whichever came first, assessed up to 12 months
measure: Overall survival
timeFrame: from the date of the first Atezo/Bev treatment date until the date of death, the discontinuation of Atezo/Bev treatment or last follow-up, whichever came first, assessed up to 12 months
measure: Cumulative incidence of liver-related complications (except for esophageal varix bleeding)
timeFrame: from the date of the first Atezo/Bev treatment date until the date of first liver-related complications (except for esophageal varix bleeding), the discontinuation of Atezo/Bev treatment or last follow-up, whichever came first, assessed up to 12 months
measure: Incidence of EVL-related complications
timeFrame: from the date of the first Atezo/Bev treatment date until the date of first EVL-related complications, the discontinuation of Atezo/Bev treatment or last follow-up, whichever came first, assessed up to 12 months
measure: Quality of Life Assessment Related to Treatment
timeFrame: Before the date of first EVL, first Atezo/Bev treatment date, and first/third EGD surveillance after first EVL
measure: Development of biomarker predicting occurrence of variceal bleeding and clinical outcome
timeFrame: through 24 weeks
Other outcomes:
Locations:
city: Seoul
country: Korea, Republic of
facility: Liver cancer center, Asan Medical Center
state: Song-pa
Study officials:
affiliation: Gastroenterology and Hepatology, Hanyang University College of Medicine, Guri, Republic of Korea
name: Jihyun An, MD, PhD
role: STUDY_DIRECTOR
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