AK112 Combined With GAP Conversion Therapy for Locally Advanced Gallbladder Cancer

NCT07767994 | Not Yet Recruiting Phase 2

• 1 other identifier: IIT-20260310
• Study Type: interventional
• Target: 22
• Locations: 0 countries
• Sites: N/A

Brief Summary

The goal of this clinical trial is to evaluate the efficacy and safety of AK112 combined with the GAP regimen as conversion therapy for patients with locally advanced gallbladder cancer who are initially considered unsuitable for curative surgery. The main questions this study aims to answer are:

1. 1.Whether AK112 combined with the GAP regimen can increase the rate of successful R0 radical resection after conversion therapy.
2. 2.Whether this treatment approach can achieve tumor response and disease control with acceptable safety in patients with locally advanced gallbladder cancer.

Conditions

Gallbladder Cancer

Keywords

Locally advanced gallbladder cancer; Conversion therapy; AK112

Outcome Measures

Primary Outcomes (1)

• R0 Resection Rate

  Approximately 6 months after treatment initiation

Secondary Outcomes (5)

• Objective Response Rate (ORR)

  From the first dose of study treatment until documented disease progression, unacceptable toxicity, or radical surgery, whichever occurs first, assessed up to 24 months.

• Disease Control Rate (DCR)

  From the first dose of study treatment until documented disease progression, unacceptable toxicity, or radical surgery, whichever occurs first, assessed up to 24 months.

• Major Pathological Response Rate

  At the time of radical surgery

• Progression-Free Survival (PFS)

  Up to 3 years after treatment initiation

• Overall Survival (OS)

  Up to 3 years after treatment initiation

Study Arms (1)

AK112 Combined with GAP Regimen

EXPERIMENTAL

Drug: AK112; Drug: Gemcitabine; Drug: Cisplatin; Drug: Albumin-Bound Paclitaxel /nab-Paclitaxel

Interventions

AK112 DRUG

AK112 will be administered intravenously at a dose of 20 mg/kg every 3 weeks in combination with gemcitabine, cisplatin, and albumin-bound paclitaxel as conversion therapy for locally advanced gallbladder cancer.

AK112 Combined with GAP Regimen

Gemcitabine DRUG

Gemcitabine is a nucleoside analog chemotherapy agent administered intravenously as part of the GAP regimen. Gemcitabine is administered at the specified dose on days 1 and 8 of each 21-day cycle (Q3W) in combination with AK112, cisplatin, and albumin-bound paclitaxel.

AK112 Combined with GAP Regimen

Cisplatin DRUG

Cisplatin is a platinum-based chemotherapy agent administered intravenously as part of the GAP regimen. Cisplatin is administered at the specified dose on days 1 and 8 of each 21-day cycle (Q3W) in combination with AK112, gemcitabine, and albumin-bound paclitaxel.

AK112 Combined with GAP Regimen

Albumin-Bound Paclitaxel /nab-Paclitaxel DRUG

Albumin-bound paclitaxel is a taxane-based chemotherapy agent administered intravenously as part of the GAP regimen. Albumin-bound paclitaxel is administered at the specified dose on days 1 and 8 of each 21-day cycle (Q3W) in combination with AK112, gemcitabine, and cisplatin.

AK112 Combined with GAP Regimen

Eligibility Criteria

• Age: 18 Years - 75 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Voluntarily provide written informed consent;
• Age ≥18 years and ≤75 years at enrollment;
• Histologically or cytologically confirmed gallbladder adenocarcinoma;
• Radiological assessment meeting any of the following criteria: a. Hepatic invasion requiring extensive hepatectomy that the patient cannot tolerate; b. Biliary tract invasion extending beyond the bifurcation threshold requiring extensive hepatectomy that the patient cannot tolerate; c. Regional lymph node metastasis with fused bulky lymph nodes (maximum short-axis diameter \>2 cm) compressing or invading critical blood vessels/biliary tracts, precluding radical lymphadenectomy; d. Primary tumor vascular invasion: main portal vein or left portal branch invasion without feasible vascular reconstruction; proper hepatic artery/common hepatic artery invasion \>180°, or invasion \<180% combined with mandatory portal vein reconstruction; right portal vein/right hepatic artery invasion with intolerance to extensive hepatectomy;e. Direct invasion of adjacent organs (pancreas, stomach, duodenum, colon);
• MDT consensus confirming initial non-resectability, with anticipated feasibility of radical resection after conversion therapy;
• Eastern Cooperative Oncology Group (ECOG) performance status score of 0 or 1;
• No prior systemic anti-tumor therapy for locally advanced gallbladder cancer;
• At least one measurable target lesion per RECIST v1.1 suitable for repeated accurate quantitative measurement;
• Adequate organ function to tolerate the conversion regimen;
• Estimated survival ≥3 months;
• Willing and able to comply with scheduled visits, treatment regimens, laboratory testing, and all other study requirements;
• Adequate hematologic, renal, hepatic, coagulation, and cardiac function confirmed by screening laboratory tests (no blood product/growth factor support within 7 days prior to screening lab draws):
• a. Hematology: i. Absolute Neutrophil Count (ANC) ≥1.5 × 10⁹/L (1,500/mm³) ii. Platelet count ≥100 × 10⁹/L (100,000/mm³) iii. Hemoglobin ≥90 g/L; b. Renal function: i. Calculated Creatinine Clearance (CrCl) ≥50 mL/min via the Cockcroft-Gault formula: CrCl (mL/min) = \[(140 - Age) × Weight (kg) × F\] / \[Serum Creatinine (mg/dL) × 72\] F = 1 for males, F = 0.85 for females; SCr = serum creatinine. ii. Urine protein ≤1+ or 24-hour urine protein quantification \<1.0 g; c. Hepatic function: i. Total bilirubin (TBil) ≤ 2 × the upper limit of normal (ULN); ii. AST and ALT ≤2.5 × ULN; iii. Serum Albumin (ALB) ≥28 g/L; d. Coagulation function: International Normalized Ratio (INR) and Activated Partial Thromboplastin Time (APTT) ≤1.5 × ULN; e. Cardiac function: Left Ventricular Ejection Fraction (LVEF) ≥50% on echocardiogram.

You may not qualify if:

• Histological or cytological confirmation of gallbladder non-adenocarcinoma: squamous cell carcinoma, neuroendocrine neoplasm, lymphoma, sarcoma;
• Presence of distant metastatic disease at screening;
• Prior radiotherapy, chemotherapy, targeted therapy, or immunotherapy for gallbladder cancer;
• Concurrent other malignant tumors besides gallbladder cancer;
• Severe uncontrolled biliary tract infection or untreated obstructive jaundice;
• Major surgery or severe trauma within 30 days prior to first study drug administration:
• Definitions:
• Major surgery: All open/laparoscopic procedures requiring general endotracheal anesthesia entering thoracic, abdominal, or pelvic cavities (e.g.,, exploratory laparotomy, gastrointestinal resection, hernia repair, partial hepatectomy); Severe trauma: Deep tissue injury, visceral rupture requiring hospitalization or surgical repair (e.g., fractures, extensive soft-tissue contusion, closed abdominal trauma);
• Minimally invasive/interventional procedures permitted with mandatory washout intervals:
• Diagnostic biopsy (lymph node, liver/gallbladder fine needle, EUS biopsy): minimum 7 days between the procedure and the first drug administration, no active hemorrhage/hematoma; Biliary decompression (PTCD, ERCP stent/nasobiliary drainage): a minimum of 14 days between the procedure and the first drug administration, no active hemorrhage, peritonitis, or biliary leakage confirmed by clinical and radiological evaluation;
• Active autoimmune disease, active inflammatory bowel disease, congenital or acquired immunodeficiency, active pulmonary tuberculosis, active syphilis infection, prior solid organ or allogeneic hematopoietic stem cell transplantation, or non-infectious interstitial lung disease requiring long-term systemic corticosteroid therapy;
• Severe bleeding diathesis or coagulation disorder history:
• Screening lab abnormalities: PLT \<100 ×10⁹/L; INR \>1.5 (without anticoagulation); APTT \>1.5 × ULN; Fibrinogen \<1.5 g/L;
• CTCAE Grade ≥2 active bleeding event within 3 months before enrollment, or uncontrolled major vascular complications;
• Confirmed hypersensitivity to any excipient or active component of the study drugs;

Sponsors & Collaborators

• First Affiliated Hospital Xi'an Jiaotong University: lead

MeSH Terms

Conditions

Gallbladder Neoplasms

Interventions

Gemcitabine; Cisplatin; Albumin-Bound Paclitaxel; 130-nm albumin-bound paclitaxel

Condition Hierarchy (Ancestors)

Biliary Tract Neoplasms; Digestive System Neoplasms; Neoplasms by Site; Neoplasms; Biliary Tract Diseases; Digestive System Diseases; Gallbladder Diseases

Intervention Hierarchy (Ancestors)

Heterocyclic Compounds; Deoxycytidine; Cytidine; Pyrimidine Nucleosides; Pyrimidines; Heterocyclic Compounds, 1-Ring; Chlorine Compounds; Inorganic Chemicals; Nitrogen Compounds; Platinum Compounds; Paclitaxel; Taxoids; Cyclodecanes; Cycloparaffins; Hydrocarbons, Alicyclic; Hydrocarbons, Cyclic; Hydrocarbons; Organic Chemicals; Diterpenes; Terpenes; Albumins; Proteins; Amino Acids, Peptides, and Proteins

Central Study Contacts

Zhimin Geng

CONTACT

13772175199; gengzhimin@mail.edu.cn

Study Design

• Study Type: interventional
• Phase: phase 2
• Allocation: NA
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Chief Physician, Professor

Study Record Dates

• First Submitted: August 4, 2026
• First Posted: August 17, 2026
• Study Start: August 28, 2026
• Primary Completion (Estimated): June 30, 2028
• Study Completion (Estimated): June 30, 2028
• Last Updated: August 17, 2026

Record last verified: 2026-08

Data Sharing

• IPD Sharing: Will not share