Circulating Exosomes As Potential Prognostic And Predictive Biomarkers In Advanced Gastric Cancer Patients (EXO-PPP Study)

Study Overview
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Brief Summary
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Exosomes are formed by inward budding of late endosomes, producing multivesicular bodies (MVBs), and are released into the environment by fusion of the MVBs with the plasma membrane. It has been demonstrated that the content and function of exosomes depends on the originating cell and the conditions under which they are produced. Tumor exosome production, transfer and education of bone marrow cells supports tumor growth and metastasis. In this prospective translational study, preclinical and clinical phases have been designed. On the first step, the main goal is to characterize the molecular profile of gastric cancer derived exosomes. This exosome biosignature may provide a useful diagnostic tool. As a second step, the study will evaluate the prognostic and predictive value of gastric cancer exosomes levels in plasma and kinetics in a prospectively recruited cohort of advanced gastric cancer patients during first-line chemotherapy.

Official Title
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Circulating Exosomes As Potential Prognostic And Predictive Biomarkers In Advanced Gastric Cancer Patients: A Prospective Observational Study (EXO-PPP Study)

Conditions
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Gastric Cancer

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Subjects eligible for enrollment must meet all of the following criteria: Provide signed informed consent. The subject is capable of understanding and complying with parameters as outlined in the protocol and able to sign informed consent, approved by the Independent Ethic Committee (IEC)/Institutional Review Board (IRB) prior to the initiation of any study-specific procedures Men or women aged >= 18 years. Eastern Cooperative Oncology Group Performance Status (ECOG) <= 2. Histologically confirmed adenocarcinoma of the stomach, gastroesophageal junction or esophagus. Metastatic disease or locally advanced disease not amenable to curative surgery. Radiographically assessable, non-measurable disease or measurable disease as per RECIST criteria. Life expectancy of at least 12 weeks from the time of enrollment. No other malignancy within the past 5 years except adequately treated basal cell or squamous cell skin cancer or carcinoma in situ of the cervix. No prior chemotherapy for advanced disease. Exclusion Criteria: Subjects meeting any of the following criteria must not be enrolled in the study: Gastric carcinoid, sarcomas, or squamous cell cancer. Pregnant or lactating females. Significant neurological or psychiatric disorders (psychotic disorders, dementia or seizures) that would prohibit the understanding and giving of informed consent. Active Hepatitis B or C or history of an HIV infection. Active uncontrolled infection.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Advanced gastric cancer patients<br>Treatment näive advanced gastric cancer patients candidates to first-line chemotherapy | |
| Control group<br>Healthy adult volunteers without a cancer diagnosis | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| • Characterization of the molecular profile in tumor derived exosomes from advanced gastric cancer patients undergoing first-line chemotherapy |  | Up to 2 years from start of study | 
| • Correlation of plasma level and kinetics of gastric cancer derived exosomes (at baseline and monthly during therapy until tumor progression or death) and time-to-event end-points: Overall survival, Progression-free survival and Overall response rate. |  | Up to 3 years from start of the study | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Advanced gastric cancer