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385 active trials for Melanoma

High Dose-Rate Brachytherapy for the Treatment of Both Primary and Secondary Unresectable Liver Malignancies

Over the past three decades, the treatment of both primary and secondary liver malignancies has been improved by the development and optimization of multiple minimally invasive thermal ablative therapies. These advances have resulted in a myriad of benefits for patients including decreased morbidity, mortality, as well as increased longevity and quality of life. However, these therapies can only be performed within certain parameters. Thermal ablative techniques such as radiofrequency ablation (RFA) and microwave ablation (MVA) are recommended for small lesions under 3 cm due to decreased efficacy when attempting to treat larger lesions. Additionally, large vessels in close proximity to a target lesion may result in heat dissipation, termed the "heat sink" effect, and result in incomplete ablation of the lesion. Furthermore, thermal ablative techniques cause off-target damage when utilized near sensitive structures such as the diaphragm, stomach, or bowel, and if performed near thermosensitive bile ducts, can result in cholestasis . Noting these limitations, percutaneous high-dose-rate brachytherapy was brought into clinical practice by Ricke et al. in Europe in 2002 . This therapy utilizes an iridium-192 (192Ir) isotope to administer a cytotoxic dose of radiation to a target lesion. It is not susceptible to heat sink effects and can also deliver radiation with the precision necessary to cause tumor death without destroying the integrity of neighboring structures. Additionally, it can be used to treat larger tumors (>3cm) as it is not associated the same size limitations as ablative techniques and can also be utilized to treat lesions that are not amenable to intra-arterial therapies (such as trans-arterial chemoembolization and yttrium-90 radioembolization). Since its inception, HDRBT has been evaluated through multiple studies investigating its use to treat lesions throughout the body including both primary and secondary liver malignancies such as hepatocellular carcinoma (HCC), cholangiocarcinoma, metastasis to the liver from colorectal cancer, pancreatic cancer , melanoma , and breast cancer . Its use in treating lymph node metastases has also been investigated . These studies have demonstrated the feasibility, safety, and clinical effectiveness of this method, establishing it as a therapeutic option when use of thermal ablation therapies is restricted. Most studies however, have been retrospective and have been performed outside the United States. Studying this therapy will add a crucial treatment option to our current armamentarium, filling a gap in currently available therapies and additionally allowing for further investigation of the use of HDRBT in a larger and more diverse population.

Start: September 2021
The Effect of Diet and Exercise on ImmuNotherapy and the Microbiome (EDEN)

Background: The human gut microbiome is a topic of growing research interest because it modulates many systems, including immune function; and, alterations of the microbiome have been associated with the development of many diseases, including cancer. Optimization of the gut microbiome can increase the probability of responding to immune checkpoint inhibitor therapy with responders exhibiting a higher level of gut microbial diversity than non-responders. Therefore, efforts are underway to investigate the effects of modulating the microbiome on response to immune checkpoint inhibitor therapy. Diet is a major modulator of the gut microbiome. In particular, a high-fiber, plant-based diet promotes greater gut microbial diversity while diets high in animal fats and protein are associated with lower gut microbial diversity. Exercise has been shown to increase gut microbial diversity independent of diet in both mice and humans. In addition, exercise has long been known to lower cancer risk and improve outcomes in cancer patients, possibly through its ability to enhance immune function. Although diet and exercise prescriptions are cost-effective and implementable on a large scale, poor compliance is a major issue. Acceptance and Commitment Training (ACT) can help improve participant engagement and compliance with lifestyle change recommendations. In previously untreated, unresectable melanoma participants, we hypothesize that the combination of a high-fiber, plant-based diet and exercise will increase gut microbial diversity and potentially increase the probability of responding to immune checkpoint inhibitor therapy. Objectives: To determine the feasibility of conducting a decentralized clinical trial involving diet and exercise prescriptions with stool sample collections in previously untreated, unresectable melanoma participants who will be undergoing anti-PD1/PDL1 monotherapy Eligibility: Adults with previously untreated and unresectable melanoma who will be undergoing anti-PD1/PDL1 monotherapy. Adequate organ function as defined by the liver, kidney, and hematologic laboratory testing. Participants who have recently used antibiotics, probiotics, fiber supplements, or any other products/medications that can significantly alter the gut microbiome will be excluded. Design: Feasibility trial wherein participants will be randomized in a 1-to-1 fashion to the following arms: Intervention Arm: 30 participants will be instructed to adopt a high-fiber, plant-based diet and to engage in at least 150 minutes of moderate or 75 minutes of vigorous intensity exercise per week. Control Arm: 30 participants will be educated on general healthy eating and exercise guidelines, but they will not be instructed to change their behavior. All participants will be asked to periodically record dietary intake (in the MyFitnessPal app or other logs, if needed), to wear a Garmin (trademark) physical activity tracker, and to collect stool samples periodically. Feasibility will be determined by assessing whether >= 60% of participants in each arm adhere to their respective protocols....

Bethesda, MarylandStart: September 2021