Clinical Trial Finder

Inclusion Criteria:

1. Be willing and able to provide written informed consent for the trial. 2. Be ≥ 18 years of age on day of signing informed consent. 3. A histological diagnosis of melanoma and at least two in-transit lesions at distinct distances from the primary site. Patients may be enrolled on the basis of a diagnosis of in-transit disease by a treating melanoma oncologist. 4. Cutaneous, mucosal or uveal melanoma are permitted. 5. Patients may be on treatment or treatment naïve. 6. Female patients of childbearing potential must have a negative urine or serum pregnancy test within 7 days from the time of pimonidazole administration.

Exclusion Criteria:

1. Subjects with in-transit disease that is not amenable to biopsy per the treating physician are excluded. 2. Subjects with known chronic immunosuppression (such as biologic agents like remicade, mycophenolate, methotrexate, prednisone >20 mg daily). 3. Subjects who are known to be HIV+, Hep B or Hep C positive.

This study will use a novel platform to profile patient biopsies, including microscopic analysis, flow cytometry for phenotyping, metabolic, and functional analyses, and metabolic profiling by Seahorse analysis to understand the unique etiology of ITMs to understand how individual melanoma lesions metabolically and immunologically evolve as they move away from the primary tumor site. A large amount of translational data is able to be derived from from an individual tissue biopsies. This study will utilize this platform to extensively evaluate 2-5 (melanoma) in-transit metastases (ITMs) per patient. It is hypothesized that as ITMs move away from the primary melanoma site each will harbor progressively hypermetabolic tumor cells and a harsher microenvironment. Each ITM station will be deeply profiled using metabolic assays, flow cytometry, and highly multiplexed immunofluorescent microscopy including, to interrogate the metabolic profiles of tumor and immune system in individual melanoma ITMs, and, to Determine tumor:immune interaction in the context of hypoxia using high-dimensional imaging. Using high throughput sequencing technologies, it will determined how tumor and immune cells interact and evolve during the course of transit in ITMs (as these cells become more metabolically and immunologically suppressive as they migrate further from the primary site). The clonal evolution analysis of tumor cells through and pimonidazole-enabled single cell RNA-sequencing will be used to identify transcriptomic changes in tumor, immune, and stromal cells correlated with hypoxia exposure.

Arms

: Pimonidazole

Single dose of 0.5 gm/m^2 of pimonidazole (approximately 13 mg/kg)

Interventions

Drug: - Pimonidazole

Pimonidazole is not used with therapeutic intent, and has a non-hazardous designation. It has been widely used for in-vivo evaluation of intratumor hypoxia, and patients will take PO pimonidazole before the scheduled biopsy. Patients receive an oral dose of pimonidazole, a safe chemical tracer up to 24 hours prior to biopsy. Pimonidazole allows for true hypoxia staining; pimonidazole binds hypoxic proteins covalently, creating an antigen that facilitates the imaging, flow cytometry, and scRNA-seq experiments proposed. Pimonidazole has been previously used in patients and is safe and well tolerated, without anticipated adverse events.