Resectable Pancreatic Adenocarcinoma

This phase II trial investigates how well the addition of olaparib following completion of surgery and chemotherapy works in treating patients with pancreatic cancer that has been surgically removed (resected) and has a pathogenic mutation in BRCA1, BRCA2, or PALB2. Olaparib is an inhibitor of PARP, an enzyme that helps repair deoxyribonucleic acid (DNA) when it becomes damaged. Blocking PARP may help keep tumor cells from repairing their damaged DNA, causing them to die. PARP inhibitors are a type of targeted therapy.

This phase II trial tests how well gemcitabine, cisplatin and nab-paclitaxel given before surgery (neoadjuvant) works in treating patients with pancreatic cancer that can be removed by surgery (resectable) or that is borderline resectable. The standard treatment for resectable and borderline resectable pancreatic cancer is a combination of surgery and chemotherapy. Neoadjuvant therapy is more feasible and could improve outcomes compared to patients receiving surgery first. Gemcitabine is a chemotherapy drug that blocks the cells from making DNA and may kill tumor cells. Cisplatin is in a class of medications known as platinum-containing compounds. It works by killing, stopping or slowing the growth of tumor cells. Nab-paclitaxel is an albumin-stabilized nanoparticle formulation of paclitaxel, an antimicrotubule agent that stops tumor cells from growing and dividing and may kill them. Nab-paclitaxel may have fewer side effects and work better than other forms of paclitaxel. Gemcitabine, cisplatin and nab-paclitaxel may be an effective neoadjuvant treatment option for patients with resectable or borderline resectable pancreatic cancer.

Since patients with (borderline) resectable pancreatic cancer have a limited life expectancy, it is important to improve treatment strategies. Therefore, the objective of this study is to investigate whether neoadjuvant triple treatment with chemotherapy (mFOLFIRINOX), immunotherapy (pembrolizumab and stereotactic radiotherapy, followed by adjuvant surgery and chemotherapy and immunotherapy, improves survival in patients with (borderline) resectabel pancreatic cancer.

The goal of this prospective observational study is to learn about the clinical utility of dynamic ctDNA-based Minimal Residual Disease (MRD) monitoring in patients with borderline resectable pancreatic cancer undergoing neoadjuvant therapy. The main questions it aims to answer are: 1. Does MRD negativity correlate with improved surgical outcomes (R0 resection rates) and long-term survival (Disease-Free Survival \[DFS\] / Overall Survival \[OS\])? 2. Can serial MRD status assessments guide optimal neoadjuvant therapy duration? Participants (n=119) will be adults aged 18-75 years with histologically confirmed pancreatic cancer meeting NCCN criteria for borderline resectable/high-risk resectable/locally advanced disease, deemed eligible for neoadjuvant therapy by a multidisciplinary team (MDT) and with ECOG performance status ≤1. Patients with distant metastasis, prior anticancer therapy, or concurrent malignancies are excluded. During 24-month study period (12-month recruitment + 12-month follow-up), enrolled subjects will: 1. Receive standard-of-care neoadjuvant therapy/surgery per physician's decision. 2. Undo serial blood draws for ctDNA-MRD testing at predefined timepoints. 2\. Be followed for DFS/OS outcomes for 18 months. This non-interventional study is conducted at Ruijin Hospital Pancreatic Surgery Department.

To explore the safety and activity of NALIRIFOX (liposomal irinotecan in combination with fluorouracil, leucovorin, and oxaliplatin) in the perioperative and adjuvant treatment in resectable pancreatic adeneocarcinoma.

Oesogastric and pancreatic adenocarcinomas are poor-prognosis cancers. Incidence of pancreatic cancer drastically increases to such an extent that it will become the second cause of cancer's mortality by 2030. A major challenge is to optimize the therapies for localized setting, when oxaliplatin-based chemotherapy is the standard, before and after surgical excision. Because in 50% of cases oxaliplatin triggers a grade 2-3 sinusoidal obstruction syndrome (SOS) which increases post-operative morbidity, decreases histological response to chemotherapy, increases tumor recurrence, and aggravates the risk of chemotherapy-induced peripheral neuropathy (CIPN). There is an urgent need to better understand the biological processes involved in SOS, in order to prevent and treat it without stopping or reducing oxaliplatin administration. The biological link between oxaliplatin and SOS has not been described, but recent murine experiments argue for HMGB1 to be the mediator released after exposure to oxaliplatin and inducing SOS, and thereafter CIPN. To date, no biomarker is established between murine and patient analyses, and the release of HMGB1 after oxaliplatin treatment and its effect on hepatic parenchyma is not described in patients. Investigators hypothesized is that HMGB1 would also been increased in patients after oxaliplatin treatment, and correlated to the development of SOS and CIPN. If confirmed, personalized treatment will be possible to target this pathway. Therefore, investigators propose to dynamically explore this hypothesis in localized oesogastric and pancreatic cancer patients who will be routinely managed by an initial laparoscopy and post-oxaliplatin surgical excision.