Oral Decitabine/Cedazuridine (DEC-C) in Combination With Nivolumab for Patients With Mucosal Melanoma

  • End date
    Jul 16, 2026
  • participants needed
  • sponsor
    University of Colorado, Denver
Updated on 16 June 2022
measurable disease
gilbert's syndrome
brain metastases
immunologic adjuvant
mucosal melanoma


Activation of the RIG-I innate immune pathway and increased expression of tumor antigens and pro-immune genes by DEC-C during Nivolumab treatment may enhance the frequency and activity of anti-tumor immune cells (CD4+ and CD8+ T-cells, NK cells) and reduce the frequency and activity of immunosuppressive cells. This may increase the overall effectiveness and success of Nivolumab treatment. This pilot clinical trial will demonstrate whether combinatorial immunotherapeutic approaches that target epigenetic immune repression and RIG-I activity can favorably alter the tumor immune cell microenvironment and benefit patients with mucosal melanoma.


This is a Phase Ib/II investigator-initiated open label trial of the combination of DEC-C and Nivolumab treatment.

This is a single-center study to be conducted at the University of Colorado Cancer Center (UCHealth central campus). A complete and current listing of investigators, research personnel, and research facilities participating in this study will be maintained throughout the duration of this study on applicable study required forms such as an FDA Form 1572, the COMIRB Research Personnel Form, and/or a UCCC Protocol Contact List, incorporated herein by reference.

Phase Ib: Bayesian optimal interval (BOIN) design will be used to assess the RP2D during phase 1b. The BOIN design is a model assistant approach used in phase I clinical trial for finding the maximum tolerated dose (MTD). The investigators anticipate 7-12 patients treated at the RP2D in Phase 1b dose de-escalation and the investigators consider that as the first stage. If there is at least one response among the 7-12 patients, the trial will move on to the second stage and enroll additional patients to reach a minimum of 16 patients.

Phase II: The objective of Phase II is to preliminarily evaluate the efficacy and further evaluate safety of the combination at the RP2D. The phase II cohort will enroll patients using the established RP2D of DEC-C from the phase Ib portion in combination with standard doses of Nivolumab. Patients treated at the RP2D in Phase 1b will be included in analysis for the Phase II component of this study. All patients enrolled at the RP2D level and receiving at least 2 treatment cycles will be included in the efficacy and safety/tolerability endpoint analysis. Our results indicate that the objective response rate (ORR) to anti-PD1 in mucosal melanoma patients at our institution is 8%. The investigator hypothesize ORR for the combination will be 33%, a 25% absolute improvement over the anti-PD1 treatment. Simon's 2-stage design will be used to evaluate the ORRs (28). The null hypothesis that the ORR is 8% will be rejected if there are 4 or more responses among the 16 patients. The design yields a type I error rate of 0.032 and power of 80% when the true response rate is 33%. The total sample size required for the Phase II will depend on the number of patients treated at the RP2D during Phase 1b, and it is estimated the total sample size will be in the range of 16-21 subjects.

Condition Malignant Melanoma
Treatment Oral Decitabine/Cedazuridine (DEC-C) in Combination with Nivolumab
Clinical Study IdentifierNCT05089370
SponsorUniversity of Colorado, Denver
Last Modified on16 June 2022


Yes No Not Sure

Inclusion Criteria

Provision to sign and date the consent form
Stated willingness to comply with all study procedures and be available for the duration of the study
Be a male or female aged 18-100
Histologically confirmed diagnosis of advanced mucosal melanoma (unresectable Stage III or Stage IV Melanoma). Anatomical locations for primary site of mucosal melanoma include oral cavity (excluding lip), nasopharynx, vagina/vulva, and rectum
Prior immune checkpoint blockade therapy, including anti-PD1 and anti-CTLA4 for unresectable locally advanced or metastatic disease, is allowed. The combination of anti-PD1 and anti-CTLA4 is also allowed as a prior line of therapy. Study therapy must be initiated within 30 days of previous immune checkpoint blockade therapy (excluding adjuvant anti-PD1 and anti-CTLA4)
Patients must have systemic cross-sectional imaging (PET/CT or CT of chest, abdomen, and pelvis) with radiographically measurable, by immune-RECIST (iRECIST) criteria, or clinically measurable disease
Previously treated brain metastatic disease is allowed. Stability of brain metastases must be confirmed by MRI > 4 weeks from most recent treatment and within 4 weeks of initiating study therapy
Patients must have an ECOG performance status of 0 or 1 (Table 5)
Patients must have adequate bone marrow function as evidenced by all of the following: ANC ≥ 2,500 microliter (mcL); platelets ≥ 100,000/mcL; Hemoglobin ≥ 10 g/dL
Patients must have adequate hepatic function as evidenced by the following: total bilirubin ≤ 1.5 x institutional upper limit of normal (IULN) (except Gilbert's Syndrome, who must have a total bilirubin < 3.0 mg/dL), and SGOT (AST) and SGPT (ALT) and alkaline phosphatase ≤ 2.5 x ULN
Patients must have adequate renal function as evidenced by ONE of the following: serum creatinine ≤ 2.0 x ULN OR measured or calculated creatinine clearance ≥ 40 mL/min
Patients known to be HIV positive are eligible if they meet the following criteria within 30 days prior to registration: stable and adequate CD4 counts (≥ 350 mm3), and serum HIV viral load of < 25,000 IU/ml. Patients may be on or off anti-viral therapy so long as they meet the CD4 count criteria
Women of childbearing potential must have a negative urine or serum pregnancy test within 72 hours prior to receiving the first dose of study medication. Women/men of reproductive potential must have agreed to use an effective contraceptive method for the course of the study through 120 days after the last dose of study medication. Should a woman become pregnant or suspect she is pregnant while she or her partner is participating in this study, she should inform her treating physician immediately. A woman is considered to be of "reproductive potential" as defined in section 5.3.2
Patients must be willing to have archived tumor specimens utilized for correlative studies if available
Patients must consent to have biopsies performed prior to treatment and around cycle 2 during study. However, in the event that tumor is inaccessible, the biopsy is not in the subject's best interest, or the patient refuses biopsy during course of the study, patients will be allowed to remain on study

Exclusion Criteria

No other prior malignancy is allowed except for the following: adequately treated basal cell or squamous cell skin cancer, in situ cervical cancer, lobular carcinoma of the breast in situ, atypical melanocytic hyperplasia or melanoma in situ, adequately treated Stage I cancer (including multiple primary melanomas) from which the patient is currently in complete remission, or any other cancer from which the patient has been disease free for three years
Patients must not currently be on other drugs metabolized by CDA
Prior cytotoxic chemotherapy treatment received within 30 days of study enrollment
Patients with leptomeningeal disease
Current immunosuppressive therapy including >10mg/day of prednisone within 14 days of enrollment is not permitted. Inhaled or topical steroids, and adrenal replacement steroid doses ≤10 mg daily prednisone equivalent, are permitted in the absence of active autoimmune disease
Patients must not have known active Hepatitis B Virus (HBV) or Hepatitis C Virus (HCV) infection prior to registration
Patients must not have active autoimmune disease that has required systemic treatment in past 2 years from date of enrollment (i.e., with use of disease modifying agents, corticosteroids or immunosuppressive drugs). Replacement therapy (e.g., thyroxine, insulin, or physiologic corticosteroid replacement therapy for adrenal or pituitary insufficiency, etc.) is not considered a form of systemic treatment
Patients must not have a history of (non-infectious) pneumonitis that required steroids or current pneumonitis
Patients must not have received live vaccines within 42 days prior to enrollment. Examples of live vaccines include, but are not limited to, the following: measles, mumps, rubella, chicken pox, shingles, yellow fever, rabies, BCG, and typhoid (oral) vaccine. Seasonal influenza and COVID-19 vaccines for injection are generally killed virus vaccines and are allowed; however, intranasal influenza vaccines (e.g., Flu-Mist®) are live attenuated vaccines, and are not allowed
Patients must not have a history or current evidence of any condition, therapy or laboratory abnormality that might confound the trial results, interfere with the patient's participation for the full duration of the trial, or indicate that participation in the trial is not in the patient's best interests, in the opinion of the treating investigator
Patients must not be pregnant or lactating
Treatment with any investigational agent within 30 days of first administration of study treatment is not permitted
Clear my responses

How to participate?

Step 1 Connect with a study center
What happens next?
  • You can expect the study team to contact you via email or phone in the next few days.
  • Sign up as volunteer to help accelerate the development of new treatments and to get notified about similar trials.

You are contacting

Investigator Avatar

Primary Contact



Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

Learn more

If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

Learn more

Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

Learn more

Similar trials to consider


Browse trials for

Not finding what you're looking for?

Every year hundreds of thousands of volunteers step forward to participate in research. Sign up as a volunteer and receive email notifications when clinical trials are posted in the medical category of interest to you.

Sign up as volunteer

user name

Added by • 



Reply by • Private

Lorem ipsum dolor sit amet consectetur, adipisicing elit. Ipsa vel nobis alias. Quae eveniet velit voluptate quo doloribus maxime et dicta in sequi, corporis quod. Ea, dolor eius? Dolore, vel!

  The passcode will expire in None.

No annotations made yet

Add a private note
  • abc Select a piece of text from the left.
  • Add notes visible only to you.
  • Send it to people through a passcode protected link.
Add a private note