Avelumab With Chemoradiation for Stage II/III Resectable Esophageal and Gastroesophageal Cancer

GastroEsophageal Cancer Clinical Trial

Official title: Phase I/II Trial of Avelumab in Combination With Chemoradiation in the Treatment of Stage II/III Resectable Esophageal and Gastroesophageal Cancer

Status Active, not recruiting

Clinical Trial Summary

This is a 2 part Phase I/II clinical trial evaluating the safety, tolerability and efficacy of avelumab in combination with chemoradiation in patients with resectable esophageal and gastroesophageal cancer.

Part 1: This is the run-in phase of the trial. This portion will determine the safety and tolerability of avelumab in combination with chemoradiotherapy in 6 patients. The proposed combination will be considered as safe if dose limiting toxicities are observed in at most 1 patient.

Part 2: This is a Phase 2 portion of the trial, which will evaluate the efficacy of the proposed treatment regimen in patients with stage II/III resectable esophageal and gastroesophageal cancer

Clinical Trial Description

Background:

Neoadjuvant chemoradiation is part of the standard of care for patients with stage II and III resectable esophageal and gastroesophageal cancer. This approach is based on the results of a large randomized clinical trial (CROSS) that demonstrated superior survival in patients receiving neoadjuvant chemoradiotherapy followed by surgical resection compared to patients treated with surgery alone. Pathological complete response at the time of resection is strongly linked to better survival. However, with current strategies pathological complete response is achieved only in a minority (29%) of patients. Remaining patients, especially those with positive lymph nodes at the time of the resection, are at significant risk for recurrences. Five-year survival rate for these patients is only 37%, and overall survival is as low as 9 months for those with persistent lymph node disease. Among patients who develop recurrent disease, most present with distant metastases outside of the radiation field. This is not surprising since the accepted treatment paradigm for this disease does not target possible disseminated microscopic systemic disease. Hence, novel strategies are needed to improve outcomes of these patients. We propose conducting a phase I/II clinical trial evaluating a role of immune checkpoint inhibitor in combination with chemoradiotherapy and post-operatively in the management of resectable esophageal cancer.

Study Rationale:

1. A number of preclinical and clinical studies demonstrated synergism between radiation and immunotherapy, suggesting that combining these approaches can enhance anti-tumor activity and increase treatment efficacy.

2. Immune checkpoint inhibitors have demonstrated promising activity in a subset of patients with metastatic esophageal and gastric cancers. Moving these agents into neoadjuvant setting may increase the cure rate of this disease compared to the standard approach.

3. Current neoadjuvant therapy does not target any potential microscopic disease outside of the radiation field since chemotherapy serves primarily as a radiation sensitizer. Immunotherapy treatment will target both local and systemic disease.

Hypothesis:

We hypothesize that co-administration of avelumab with chemoradiation will be well tolerated and will increase pathological complete response rate in resected tumor specimens. We hypothesize that avelumab treatment will also decrease the rates of disease recurrence.

Study Design:

This is a 2 part Phase I/II clinical trial evaluating the safety, tolerability and efficacy of avelumab in combination with chemoradiation in patients with resectable esophageal and gastroesophageal cancer.

Part 1: This is the run-in phase of the trial. This portion will determine the safety and tolerability of avelumab in combination with chemoradiotherapy in 6 patients. The proposed combination will be considered as safe if dose limiting toxicities are observed in at most 1 patient.

Part 2: This is a Phase 2 portion of the trial, which will evaluate the efficacy of the proposed treatment regimen in patients with stage II/III resectable esophageal and gastroesophageal cancer.

Objectives:

Primary: Evaluate the safety of avelumab in combination with chemoradiation in patients with resectable esophageal cancer and gastroesophageal receiving perioperative therapy.

Secondary: Obtain efficacy data and further safety data of the proposed drug combination in this patient population.

Exploratory objectives: The translational focus of the study will evaluate changes in tumor microenvironment that occur in response to radiation and immunotherapy.

Endpoints:

Part 1 - Primary endpoint: Establish safety and tolerability of the proposed treatment.

Part 2 - Primary Endpoint: Pathological complete response rate.

Part 2 - Secondary Endpoints:

1. Safety and tolerability.

2. Disease free survival.

3. Incidence of surgical complications.

4. Rate of R0 resection.

Number of centers & patients: One center.

Part 1: total of 6 eligible patients will be accrued to evaluate the safety and tolerability of the proposed combination.

Part 2: 18 patients will be enrolled in the phase 2 portion of the trial.

Population:

Patients with histologically confirmed, potentially curable squamous-cell carcinoma, adenocarcinoma, or large-cell undifferentiated carcinoma of the esophagus and gastroesophagus who are candidates for neoadjuvant therapy and surgical resection.

Investigational drugs:

Avelumab (Provided by EMD Serono). IND information to be added as needed. ;

Related Conditions & MeSH terms

• GastroEsophageal Cancer
• Resectable Esophageal Cancer

• NCT number: NCT03490292
• Study type: Interventional
• Source: University of Wisconsin, Madison
• Status: Active, not recruiting
• Phase: Phase 1/Phase 2
• Start date: May 29, 2018
• Completion date: March 2023