Prospectively Defining Metastatic Pancreatic Ductal Adenocarcinoma Subtypes by Comprehensive Genomic Analysis

Titre officiel

Prospectively Defining Metastatic Pancreatic Ductal Adenocarcinoma Subtypes by Comprehensive Genomic Analysis

Sommaire:

Les chercheurs souhaitent mieux comprendre le cancer du pancréas et trouver de meilleures façons de le traiter. Le but de cette étude est de déterminer dans quelle mesure il est utile de rechercher les modifications et les caractéristiques dans vos gènes (molécules contenant des instructions qui déterminent le développement et le fonctionnement des cellules) et les gènes à l’intérieur de la tumeur. Ces caractéristiques pourraient être utiles dans le choix des traitements des patients à l’avenir. Il a été démontré que les changements (mutations) dans les gènes sont une caractéristique importante dans les cancers. L’étude des différences dans les gènes chez les patients atteints d’adénocarcinomes canalaires pancréatiques avancés et la comparaison de ces informations avec la réponse des patients à leur traitement initial par chimiothérapie pourrait aider à déterminer quels traitements sont supérieurs pour certains patients après le traitement initial.

Description de l'essai

Primary Outcome:

  • Number of days between biopsy and return of comprehensive genomic results.
Secondary Outcome:
  • Response Rate
  • Disease Control Rate
  • Duration of Response
  • Progression-Free Survival
  • Overall Survival
This is a prospective non-randomized study of patients with metastatic pancreatic ductal adenocarcinoma (PDAC) undergoing first-line systemic chemotherapy with either FOLFIRINOX or GP-based regimens, where tumour samples, baseline and serial blood and urine samples and standardized clinical and radiological assessments will be obtained. Patients planned for treatment with an investigational agent(s) within a clinical trial using either FOLFIRINOX or GP as the chemotherapy backbone will also be eligible, as long other eligibility criteria for the study are met.

A total of 190 patients will be recruited over the study period. Patients will undergo fresh tumour biopsy at study enrollment for comprehensive molecular characterization (biopsy cohort). Patients who are unable to undergo biopsy but fulfill all other eligibility criteria will comprise the archival cohort, where limited genomic analyses will be performed on archival tumour samples. Patients with a radiological diagnosis of metastatic PDAC without a confirmatory histological diagnosis may be eligible; in these cases, tumour biopsy for establishing a pathological diagnosis will be given first priority. Remaining tumour samples will be used for research purposes only after the diagnosis of PDAC has been established. In the rare event (<5%) where the histological diagnosis is other than PDAC, patients will be censored from the study and all tumour materials stored for future clinical use outside of this study.

All patients will undergo serial collection of plasma, serum and urine samples at baseline and every 4 weeks until radiological disease progression is confirmed using RECIST 1.1. These will be used for exploratory biomarker analyses. Serum CA19-9 will also be measured at baseline and every 4 weeks thereafter as part of routine standard of care until disease progression is confirmed. In addition, a whole blood sample will be collected at baseline to study germline DNA variants. CT chest, abdomen and pelvis will be performed at baseline and every 8 weeks, with radiological response to therapy assessed using RECIST 1.1.

Patients in the biopsy cohort must have at least one tumour lesion amenable to biopsy from which a minimum of 3 tumour cores can be safely obtainable under CT or ultrasound guidance, as assessed by a staff interventional radiologist. A maximum of 5 tumour cores will be taken from each patient at baseline prior to treatment with FOLFIRINOX or GP. At the time of radiological disease progression, an optional second tumour biopsy will be collected to study changes in the molecular characteristics of tumours under the selection pressure of first-line systemic therapy. This tumour biopsy will be performed using exactly the same procedures described for the baseline biopsy. Tumour biopsies and molecular analyses will be performed through the Personalized Oncogenomics (POG) program of BC (British Columbia) pipeline. Depending on the amount of tumour material obtained from each patient, molecular analyses will be prioritized as described below.

The primary endpoint of PanGen is the generation of molecular and phenotypic signatures of individual tumours in a clinically relevant timeframe. The signature data will be correlated with clinical outcome. One of the key strengths of this cohort approach will be the rigorous annotation of PDAC patients' clinical features and outcomes to all treatments (first-line and other) linked to the molecular profile. The investigators have the potential to be nimble as more data is generated, more hypotheses can be explored and others fine-tuned or eliminated.

Voir cet essai sur ClinicalTrials.gov

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