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A Phase II Trial of the DNA Methyl Transferase Inhibitor, Guadecitabine (SGI-110), in Children and Adults With Wild Type GIST,Pheochromocytoma and Paraganglioma Associated With Succinate Dehydrogenase Deficiency and HLRCC-associated Kidney Cancer

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT03165721
Recruitment Status : Recruiting
First Posted : May 24, 2017
Last Update Posted : March 6, 2019
Information provided by (Responsible Party):
National Institutes of Health Clinical Center (CC) ( National Cancer Institute (NCI) )

Brief Summary:


Wild-type gastrointestinal stromal tumor (GIST) is a cancer in the esophagus, stomach, or intestines. It does not respond well to standard chemotherapy or radiation therapy. Most people with GIST are treated with imatinib. But it may not work in many children with GIST. Researchers think the drug SGI-110 may help treat people with GIST, pheochromocytoma and paraganglioma (PHEO/PGL), or kidney cancer related to hereditary leiomyomatosis and renal cell carcinoma (HLRCC).


To learn if SGI-110 causes GIST tumors to shrink or slows their growth. Also to test how it acts in the body.


People ages 12 and older who have GIST, PHEO/PGL, or HLRCC that has not responded to other treatments


Participants will be screened with:

  • Physical exam
  • Urine tests
  • CT or MRI, or FDG-PET scan: A machine takes pictures of the body.
  • Blood tests

Participants will be injected with SGI-110 under the skin each day for 5 days. This cycle will repeat every 28 days. The cycles repeat until their side effects get too bad or their cancer gets worse.

Participants will have tests throughout study:

  • Physical exam and blood and urine tests before each cycle
  • Blood tests on days 1, 7, 14, and 28 of the first cycle.
  • Scans before cycle 1 and then every other cycle.
  • Questionnaires about their pain and quality of life
  • Tumor biopsy for those 18 and older: A needle removes a small piece of tumor.

After they stop treatment, participants will have a final visit. This includes an evaluation of their health, pain, and quality of life.


Condition or disease Intervention/treatment Phase
Paraganglioma Gastrointestinal Stromal Tumors Carcinoma, Renal Cell Renal Neoplasms Pheochromocytoma Drug: SGI-110 (guadecitabine) Phase 2

  Show Detailed Description

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 70 participants
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: A Phase II Trial of the DNA Methyl Transferase Inhibitor, SGI-110 (Guadecitabine), In Children And Adults With Wild Type GIST, Pheochromocytoma And Paraganglioma Associated With Succinate Dehydrogenase Deficiency And HLRCC-Associated Kidney Cancer
Actual Study Start Date : August 16, 2017
Estimated Primary Completion Date : December 1, 2020
Estimated Study Completion Date : December 1, 2021

Arm Intervention/treatment
Experimental: Arm 1
SGI-110 administered subcutaneously at 45mg/m2/day x 5 days on a 28-day cycle
Drug: SGI-110 (guadecitabine)
SGI-110 will be administered subcutaneously at 45mg/m2/day x 5 days on a 28-day cycle. Cycles may be repeated until there is evidence of tumor progression clinically or by RECIST v1.1 or there is intolerable toxicity that is not alleviated by dose reduction.

Primary Outcome Measures :
  1. Assess clinical activity of SGI-11 using RECIST [ Time Frame: After the first 4 weeks, then every 8 weeks ]

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   12 Years to 99 Years   (Child, Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Patients must:

  • Have recurrent or refractory/unresectable disease for which there is no known curative therapy.

    ---Wild type-GIST: Patients with recurrent or progressive disease will be eligible. Newly diagnosed patients with resectable localized disease will not be eligible. Newly diagnosed patients with metastatic disease and newly diagnosed patients with residual tumor following surgical debulking will be eligible.

    • PHEO/PGL: Patients with recurrent or progressive disease will be eligible. Newly diagnosed patients with PHEO/PGL that is metastatic at diagnosis and/or unresectable will be eligible Patients with PHEO/PGL with localized (non-metastatic), resectable disease will not be eligible.
    • Renal cell cancer associated with HLRCC: Patients with localized, resectable HLRCC-associated renal cell cancer will not be eligible. Patients with metastatic and/or unresectable HLRCC-associated renal cell cancer will be eligible.
  • Have one of the following confirmed histologically, cytologically, or through biochemical testing:

    • wild-type GIST (GIST without KIT or PDGFRA mutation);
    • PHEO/PGL with a germline mutation in SDHA, SDHB, SDHC, or SDHD;

      --renal cell cancer associated with HLRCC.

  • Testing will be performed in CLIA certified labs using genetic tests for KIT/PDGFRA and testing panels developed for patients with PHEO/PGL. Results from outside labs will be accepted. Pathologic diagnosis will be reviewed and verified at the Clinical Center.
  • Age: be greater than or equal to 12 years of age

Because there is no dosing or adverse event data currently available on the use of SGI-110 in children < 18 year of age, children < 12 years of age will be excluded from this study, but may be eligible for future pediatric trials should the results of the study be positive.

- Measurable disease:

Have measurable disease, defined as at least one lesion that can be accurately measured in at least one dimension (longest diameter to be recorded for non-nodal lesions and short axis for nodal lesions) as greater than or equal to 20 mm with conventional techniques or as greater than 10 mm with spiral CT scan.

  • Prior Therapy
  • Prior therapy requirements:

    ---Wt-GIST: Because there are no standard chemotherapy regimens known to be effective for wt-GIST, previously untreated participants are eligible.

    --PHEO/PGL with germline SDH subunit mutation: 131I-MIBG in patients with MIBG avid tumors or cytotoxic chemotherapy (CVD or temozolomide) is required prior to enrollment on this trial. However, patients who have refused cytotoxic chemotherapy or for whom treatment on this protocol prior to receiving cytotoxic chemotherapy is felt to be in the best interest for the patient by the local investigator will also be eligible.

    ---HLRCC-associated renal cell cancer: Because there are no standard chemotherapy regimens known to be effective for HLRCC-associated renal cell cancer, previously untreated participants are eligible.

  • Prior therapy wash-out period requirements

    --Participants must be at least 4 weeks from prior surgical procedures and surgical incisions must be healed.

    ---Participants must have had their last fraction of external beam radiation therapy at least 4 weeks prior to enrollment. Participants with prior radiation therapy must be at least 4 weeks post therapy and have had progression of disease outside the radiation port.

    • Participants must have had their last dose of cytotoxic chemotherapy at least 28 days prior to enrollment, their last dose of biological therapy, such as biological response modifiers (e.g., cytokines), immunomodulatory agents, vaccines, differentiating agents, used to treat their cancer at least 28 days prior to enrollment, their last dose of a monoclonal antibody at least 28 days prior to enrollment, and their last dose of any investigational agent at least 28 days prior to enrollment.
    • Participants must have recovered from the acute toxic effects of prior therapy to a grade 1 level prior to enrollment (does not apply to alopecia).
  • Performance Level: ECOG performance status less than or equal 2 or Karnofsky greater than or equal to 60% in patients greater than 16 years of age, Lansky greater than or equal to 60 for patients less than or equal to 16 years of age.
  • Have normal organ and marrow function as defined below:

    • absolute neutrophil count greater than or equal to 1,500/mcL
    • platelets greater than or equal to 100,000/mcL
    • total bilirubin within normal institutional limits
    • AST(SGOT)/ALT(SGPT) less than or equal to 2.5 x institutional upper limit of normal
    • creatinine within normal institutional limits


----creatinine clearance greater than or equal to 60 mL/min/1.73 m^2 for patients with creatinine levels above institutional normal.

-Birth Control:

The effects of SGI-110 on the developing human fetus are unknown. For this reason and because decitabine is known to be teratogenic, women of child-bearing potential and men must agree to use adequate contraception (hormonal or barrier method of birth control; abstinence) prior to study entry and for the duration of study participation, and for 6 months following participation. 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.

-Ability of subject or legal guardians (if the patient is <18 years old) to understand and the willingness to sign a written informed consent document.


Patients with any one the following will be excluded:

  • Ongoing radiation therapy, chemotherapy, hormonal therapy directed at the tumor, immunotherapy, or biologic therapy, including investigational agents for their disease.
  • History of allergic reactions to SGI-110 or decitabine.
  • Uncontrolled intercurrent illness including, but not limited to, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, symptomatic pulmonary disease or psychiatric illness/social situations that would limit compliance with study requirements.
  • Pregnant or breastfeeding

Pregnant women are excluded from this study because SGI-110 is a derivative of decitabine which has the potential for teratogenic or abortifacient effects. Because there is an unknown but potential risk for adverse events in nursing infants secondary to treatment of the mother with SGI-110, breastfeeding should be discontinued if the mother is treated with SGI-110.

These potential risks may also apply to other agents used in this study.

  • Any evidence of severe or uncontrolled systemic disease, active infection, active bleeding diatheses, or renal transplant, including any patient known to have hepatitis B, hepatitis C, or human immunodeficiency virus (HIV) will be excluded. Patients with HIV who have adequate CD4 count, not requiring antiretroviral medication, may be enrolled.
  • Patients who, in the opinion of the investigator, may not be able to comply with the safety monitoring requirements of the study.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT03165721

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Contact: Melissa M Spencer (Amaya), R.N. (240) 760-6101

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United States, Maryland
National Institutes of Health Clinical Center Recruiting
Bethesda, Maryland, United States, 20892
Contact: For more information at the NIH Clinical Center contact National Cancer Institute Referral Office    888-624-1937      
Sponsors and Collaborators
National Cancer Institute (NCI)
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Principal Investigator: John W Glod, M.D. National Cancer Institute (NCI)

Additional Information:
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Responsible Party: National Cancer Institute (NCI) Identifier: NCT03165721     History of Changes
Other Study ID Numbers: 170088
First Posted: May 24, 2017    Key Record Dates
Last Update Posted: March 6, 2019
Last Verified: February 21, 2019

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Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by National Institutes of Health Clinical Center (CC) ( National Cancer Institute (NCI) ):
Renal Cancer
DNA Hypermethylation
Gastrointestinal Stromal Tumors
DNA Methyltransferase (DNMT) Inhibitor
Succinate Dehydrogenase (SDH) Deficiency
Additional relevant MeSH terms:
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Kidney Neoplasms
Carcinoma, Renal Cell
Gastrointestinal Stromal Tumors
Carotid Body Tumor
Urologic Neoplasms
Urogenital Neoplasms
Neoplasms by Site
Kidney Diseases
Urologic Diseases
Neoplasms, Glandular and Epithelial
Neoplasms by Histologic Type
Neoplasms, Connective Tissue
Neoplasms, Connective and Soft Tissue
Gastrointestinal Neoplasms
Digestive System Neoplasms
Digestive System Diseases
Gastrointestinal Diseases
Neuroendocrine Tumors
Neuroectodermal Tumors
Neoplasms, Germ Cell and Embryonal
Neoplasms, Nerve Tissue
Paraganglioma, Extra-Adrenal
Antineoplastic Agents