Pancreatic Cancer Clinical Trial
Official title:
A SU2C Catalyst ® Randomized Phase II Trial of the PD1 Inhibitor Pembrolizumab With or Without a Vitamin D Receptor Agonist Paricalcitol in Patients With Stage IV Pancreatic Cancer Who Have Been Placed in Best Possible Response
Chemotherapy regimens for pancreatic cancer can now stabilize a patient's cancer and/or place some patients in remission or partial remission. The challenge now is to find options for maintenance therapies that will improve survival and allow continued benefits with minimal toxicities and inconvenience to the patients. This study will determine the effects of one possible maintenance regimen. The study is being conducted to determine the effects that pembrolizumab with or without the addition of paricalcitol may have on pancreatic cancer. Half of the patients will be randomized to receive pembrolizumab + paricalcitol and half to receive pembrolizumab + placebo.
Pembrolizumab (also known as Keytruda®), which is approved in the USA and some other countries, is available by prescription to treat several different cancers, but has not been approved to treat pancreatic cancer. Pembrolizumab helps the body detect and fight cancer by making cancer cells more vulnerable to attack by the body's immune system. This medication binds to and lessens the action of specific parts of cells in the body's immune system, which act to modulate or balance the immune response. By decreasing this modulation of the immune response, the body's own system may be better able to fight the cancer. Pembrolizumab is known as an immune checkpoint inhibitor. It is thought that the effect of pembrolizumab could possibly be strengthened by the addition of paricalcitol, which is a form of vitamin D. Paricalcitol may make the cells in the immune system more sensitive to the activity of pembrolizumab and could make the local environment hostile to the cancer cells. Both activities could be effective against cancer growth. Paricalcitol (also known as Zemplar®) is used to treat high levels of parathyroid hormone and prevent bone loss in patients with advanced kidney disease. Paricalcitol is not approved by the FDA for the treatment of advanced pancreatic cancer. The effects of the study drugs will be assessed by repeated radiological imaging (CT scans), incidence of adverse reactions, and survival rates. Participants will also be asked to provide biological specimens for the study team to measure cellular changes. This will include fecal matter (stool), blood, and tumor tissue. The Food and Drug Administration (FDA) has determined that this study meets the requirements for Investigational New Drug (IND) Exemption. ;
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