Re-differentiation of Radioiodine-Refractory BRAF V600E-mutant Papillary Thyroid Carcinoma With GSK2118436

January 24, 2017 updated by: Lori J. Wirth, MD, Massachusetts General Hospital

Radioactive iodine therapy is often part of the standard treatment for Papillary Thyroid Carcinoma (PTC) patients. However, in many patients, tumors develop a resistance or no longer respond to radioactive iodine therapy (iodine-refractory). Several lines of evidence suggest that blocking the BRAF gene may help to re-sensitize the tumors to radioactive iodine. BRAF is a protein that plays a central role in the growth and survival of cancer cells in some types of PTC. The investigational drug GSK2118436 may work by blocking the BRAF protein in cancer cells lines and tumors that have a mutated BRAF gene.

In this research study, the investigators are looking to see if GSK2118436 can re-sensitize iodine-refractory PTC to radioactive iodine therapy. The investigators are also looking at the safety of adding GSK2118436 to radioactive iodine therapy.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

You will take GSK2118436 capsules by mouth for 28 straight days. If your Day 28 whole body radioactive iodine scan demonstrates significant uptake of iodine, you will take GSK2118436 for an additional 14 days (Days 29-42). You will be given a drug diary to record when you take GSK2118436. This diary will also contain instructions on how to take GSK2118436.

Prior to Day 1

  • Optional fine needle aspirate (pre-treatment) Day 1
  • Vital signs
  • Routine blood tests (2 tablespoons)
  • Research blood sample for Circulating Tumor Cells (CTCs). (4 teaspoons of blood)
  • Optional research blood sample for CTCs 4-6 hours after the first dose of GSK2118436

Day 2:

  • Optional research blood sample for CTCs 4-6 hours after the first dose of GSK2118436 Day 3-5: Research blood sample for CTCs Days 8 and 15
  • Vital signs
  • Routine blood tests (2 tablespoons)
  • Research blood sample for CTCs. (4 teaspoons of blood)
  • Optional fine needle aspirate (Day 15 only) Low Iodine Diet: You will begin a low iodine diet on Day 15, in preparation for Day 23 when you will receive radioactive iodine (131I). The study team will provide you with instructions on this diet. The low iodine diet will be continued until the whole body scan is complete. For those participants who will receive a therapeutic dose of radioactive iodine on Day 37, the low iodine diet will be continued until the Day 42 whole body scan is complete.

Days 21 and 22: The drug thyrogen will be administered as in injection into your buttocks on Days 21 and 22 in preparation for your whole body radioactive iodine scan on Day 28. Thyrogen is used as a diagnostic tool to help determine the status of your cancer and is approved for use in thyroid cancer patients.

Day 23: To prepare for the whole body radioactive iodine scan, you will be asked to swallow a capsule of radioactive iodine which will be absorbed by any remaining thyroid cells in your body. Radioactive iodine is approved for use in thyroid cancer patients. You will then be asked to return for the scan on Day 28.You will be asked to sign a separate consent for the radioactive iodine.

Days 1-28:

  • Optional repeat fine needle aspirate Day 28
  • Whole body radioactive iodine scan to assess your thyroid cancer

If your Day 28 whole body radioactive iodine scan demonstrates significant uptake of iodine, you will have the following tests done within 24 hours:

  • Vital signs
  • Routine blood tests (2 tablespoons)
  • Research blood sample for CTCs. (4 teaspoons of blood)
  • An injection of a therapeutic dose of radioactive iodine will be administered. If your Day 28 whole body radioactive iodine scan does not demonstrate significant uptake of iodine, you will be removed from the research study. You will have a 3 month follow up appointment as outlined below.

If your Day 28 whole body radioactive iodine scan demonstrates significant uptake of iodine, you will continue treatment with GSK2118436 and have the following study visits:

Days 35 and 36: The drug thyrogen will be administered as in injection into your buttocks on Days 35 and 36 in preparation for your whole body radioactive iodine scan on Day 42.

Day 37: You will be given a therapeutic dose of radioactive iodine. You will be given a separate consent form to sign for your radioactive iodine treatment. You will then be asked to return for the whole body radioactive iodine scan on Day 42.

Day 39:

  • Vital signs
  • Routine blood tests (1 tablespoon)

Day 42:

  • Whole body radioactive iodine scan
  • Research blood sample for CTCs. (4 teaspoons of blood)

After the final dose of the study drug: All participants will have a follow up visit 3 months after you stop the study drug. You will have the following tests at this visit:

  • Routine blood tests (2 tablespoons)
  • Research blood sample for CTCs. (4 teaspoons of blood)
  • An assessment of your tumor by CT scan or PET/CT scan of your neck, chest, abdomen and pelvis.
  • Those participants who had a therapeutic dose of radioactive iodine on Day 37 will have a whole body radioactive iodine scan.
  • Optional fine needle aspirate

Study Type

Interventional

Enrollment (Actual)

10

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Massachusetts
      • Boston, Massachusetts, United States, 02215
        • Massachusetts General Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Histologically confirmed papillary thyroid carcinoma, including its variants, such as tall cell PTC or poorly differentiated thyroid carcinoma, that is metastatic or unresectable AND harbors a BRAF V600E mutation
  • Evaluable disease, as defined by at least one lesion that can be accurately measured in at least one dimension on CT scan or ultrasound, if present in the neck
  • Radioiodine-refractory disease
  • Life expectancy > 6 months
  • Able to swallow and retain oral medication
  • Normal organ and marrow function

Exclusion Criteria:

  • Pregnant or breastfeeding
  • Previous treatment with a specific BRAF or MEK inhibitor
  • Receiving any other study agents
  • Known brain metastases
  • History of allergic reactions attributed to compounds of similar chemical or biologic composition to GSK2118436, bovine TSH, mannitol or iodine
  • Active gastrointestinal disease or other condition that will interfere significantly with the absorption of drugs
  • History of known glucose-6-phosphate dehyrogenase (G6PD) deficiency
  • Corrected QT interval >/= 480 msecs; history of acute coronary syndromes (including unstable angina), coronary angioplasty, or stenting within the past 24 weeks; Class II, III, or IV heart failure, abnormal cardiac valve morphology; or history of known cardiac arrhythmias
  • Taking herbal remedies
  • Subjects with significant symptoms from their thyroid cancer, or have a large burden of rapidly progressive iodine-refractory PTC who are in need of other systemic therapy, as judged by their treating physician
  • Uncontrolled current illness including, but not limited to: ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, uncontrolled hypertension or psychiatric illness/social situations that would limit compliance with study requirements
  • History of a different malignancy unless disease-free for at least 5 years and deemed to be at low risk for recurrence
  • HIV-positive on combination antiretroviral therapy

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: GSK2118436
Intervention: GSK2118436 (dabrafenib) 150mg by mouth twice per day for 28 days, continued to day 42 if the Day 25 Iodine-131 scan shows new uptake. Patients with new Iodine-131 uptake on Day 25 who continue dabrafenib to day 42 receive a treatment dose (150 mCi) of Iodine-131 on Day 37.
Drug: GSK2118436
150mg twice per day orally for 28 days (42 days if Iodine-131 scan on Day 25 shows new uptake)
Other Names:
  • Dabrafenib

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Increased Radioiodine Uptake
Time Frame: 25 days after start of Dabrafenib (GSK2118436)
Number of patients with radioiodine-refractory metastatic BRAF V600E-mutant PTC who have increased radioiodine uptake in their disease sites while on dabrafenib. Radioiodine uptake is assessed by whole body scan and areas of interest are identified by nuclear medicine physicians.
25 days after start of Dabrafenib (GSK2118436)

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Safety Analysis as Number of Participants With Adverse Events
Time Frame: 2 years
To evaluate the safety and tolerability, as determined by adverse event and serious adverse event reporting, of GSK2118436 in combination with whole body iodine scans (all patients) and treatment doses of radioactive iodine (patients whose tumors demonstrate significant iodine uptake).
2 years
Clinical Benefit as Measured by Change in Tumor Size
Time Frame: 2 years
To evaluate clinical benefit as measured by objective response rate per modified RECIST 1.1, which assesses changes in size of measurable tumors. (per RECIST, a partial response (PR) = at least 30% decrease in size of tumor; progressive disease (PD) = at least 20% increase in size of tumor; stable disease (SD) = neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for PD).
2 years
Number of Participants Who Complete the Study With Minimal Delays and no Dose Reductions
Time Frame: 2 years
To determine the feasibility of: (a) administering GSK2118436 for 28 days in patients with BRAF V600E-mutant PTC, prior to whole body iodine scanning (all patients); and (b) administering GSK2118436 for an additional 14 days, prior to administering treatment doses of radioactive iodine (patients whose tumors demonstrate significant iodine uptake after 28 days of treatment).
2 years
Clinical Benefit as Measured by Change in Thyroglobulin Level
Time Frame: 3 months after radioiodine therapy
To evaluate clinical benefit as measured by change in serum tumor marker, thyroglobulin. Rising thyroglobulin is generally indicative of tumor growth.
3 months after radioiodine therapy

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Massachusetts General Hospital

Collaborators

GlaxoSmithKline

Investigators

  • Principal Investigator: Stephen M Rothenberg, MD, PhD, Massachusetts General Hospital

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

July 1, 2012

Primary Completion (Actual)

March 1, 2014

Study Completion (Actual)

March 1, 2014

Study Registration Dates

First Submitted

February 10, 2012

First Submitted That Met QC Criteria

February 14, 2012

First Posted (Estimate)

February 17, 2012

Study Record Updates

Last Update Posted (Actual)

March 15, 2017

Last Update Submitted That Met QC Criteria

January 24, 2017

Last Verified

January 1, 2017

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 11-337

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Clinical Trials on Papillary Thyroid Carcinoma

Clinical Trials on GSK2118436

Search Similar Trials

Sponsors and Collaborators

Medical Conditions

Drug Interventions

CROs by country

CROs in India

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

Locations

Subscribe