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Effects of Vitamin D Replacement in Patients With Primary Hyperparathyroidism (PHPT)

Primary Purpose

Hyperparathyroidism

Status
Completed
Phase
Phase 1
Locations
United States
Study Type
Interventional
Intervention
Vitamin D
Four-dimensional computed tomography (4DCT)
Sponsored by
M.D. Anderson Cancer Center
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional diagnostic trial for Hyperparathyroidism focused on measuring Primary Hyperparathyroidism, PHPT, Parathyroid glands, Vitamin D deficiency, Vitamin D, Ergocalciferol

Eligibility Criteria

21 Years - undefined (Adult, Older Adult)All SexesDoes not accept healthy volunteers

Inclusion Criteria:

  1. Be diagnosed with PHPT (inappropriate PTH level in the setting of a high or high-normal corrected serum calcium level equal to or greater than 10.0 mg/dL)
  2. Be considered an appropriate surgical candidate
  3. Be older than 21 years of age
  4. Have a vitamin D (25-OHD) level less than or equal to 20ng/ml
  5. Female participants of childbearing potential must have a negative pregnancy test (urinary or serum beta-HCG) within two weeks before signing consent

Exclusion Criteria:

  1. Have any other functional tumors if they have familial multiple endocrine neoplasia syndrome 1 or 2 (MEN 1 or MEN 2)
  2. Have a corrected calcium level greater than 13mg/dL
  3. Have a recent history of kidney stones
  4. Have a recent history of pancreatitis
  5. Have a recent history of cardiac arrhythmia (eg atrial fibrillation)
  6. Unable to keep still for 2 minutes without coughing
  7. Having a body habitus that prevents adequate images to be obtained through the region of the parathyroids (ie typically weighing in excess of 250Lbs)
  8. Have a serum creatinine greater than 2.0 mg/dl
  9. Have hypersensitivity to ergocalciferol or any component of the formulation

Sites / Locations

  • University of Texas MD Anderson Cancer Center

Arms of the Study

Arm 1

Arm Type

Experimental

Arm Label

Vitamin D

Arm Description

Vitamin D starting dose 50,000 IU by mouth 3 times weekly for three weeks (+/- one week), then 50,000 IU twice weekly for 6 weeks (+/- one week).

Outcomes

Primary Outcome Measures

Size of parathyroid glands
Size of individual gland recorded while only the gland with maximum size at baseline included for analysis of primary endpoint. With sample size of 22, a two-sided 95% confidence interval for mean changes in size of parathyroid glands will extend 2.09 from observed mean, assuming that standard deviation is known to be 5 and confidence interval is based on the z statistic. Parameters for parathyroid glands compared pre- and post-replacement on an individual, gland-by-gland basis.

Secondary Outcome Measures

Full Information

First Posted
October 2, 2007
Last Updated
March 21, 2019
Sponsor
M.D. Anderson Cancer Center
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1. Study Identification

Unique Protocol Identification Number
NCT00538720
Brief Title
Effects of Vitamin D Replacement in Patients With Primary Hyperparathyroidism (PHPT)
Official Title
Pilot Study to Detect and Assess the Effect of Vitamin D Replacement on Gland Size by 4DCT in Patients With Primary Hyperparathyroidism (PHPT)
Study Type
Interventional

2. Study Status

Record Verification Date
March 2019
Overall Recruitment Status
Completed
Study Start Date
October 2007 (Actual)
Primary Completion Date
May 30, 2018 (Actual)
Study Completion Date
May 30, 2018 (Actual)

3. Sponsor/Collaborators

Responsible Party, by Official Title
Sponsor
Name of the Sponsor
M.D. Anderson Cancer Center

4. Oversight

Studies a U.S. FDA-regulated Drug Product
Yes
Studies a U.S. FDA-regulated Device Product
No
Data Monitoring Committee
No

5. Study Description

Brief Summary
The goal of this clinical research study is to learn how the standard practice of giving Vitamin D supplements to patients with a Vitamin D deficiency may affect the size of the parathyroid glands in patients with PHPT and a Vitamin D deficiency.
Detailed Description
The Study Vitamin: In patients with PHPT and a Vitamin D deficiency, Vitamin D supplements are routinely given to bring Vitamin D blood levels up to a normal level before surgery on any abnormal parathyroid glands. When patients have Vitamin D deficiency, they do not absorb calcium very well, so the parathyroid glands have to work harder. This may cause the parathyroid glands to become larger. Baseline: If you are found to be eligible to take part in this study, as part of your routine standard of care, you will have a 4-dimensional computed tomography (4DCT) scan of the neck. This 4DCT will be used to find the size and location of your parathyroid glands to help the surgeon in planning the surgery. Vitamin D Administration: You will receive Vitamin D pills to take at home, by mouth. You should take the Vitamin D at the same time each day. If it causes an upset stomach, you should take it with food. You will be given a study diary to record the days that you take the Vitamin D pills. You will return the diary at the end of each cycle. Cycle 1: During Cycle 1 (about the first 3 weeks of the study, +/- 1 week), you will take 3 Vitamin D pills per week about every other day (for example, Mondays, Wednesdays, and Fridays). At the end of Cycle 1, blood (about 1 teaspoon) will be drawn to check Vitamin D levels. If your Vitamin D level is not high enough at this first Cycle 1 study visit, you will repeat the Cycle 1 dosing schedule a second time. At the end of this second Cycle 1 dosing schedule, you will have another blood test (about 1 teaspoon) to check your Vitamin D levels. If your Vitamin D level is not high enough, you will be taken off study. If your Vitamin D level is high enough after either your first or second Cycle 1 dosing schedule, you will go to Cycle 2. Cycle 2: During Cycle 2, the dosing schedule for Vitamin D is 2 pills per week for 6 weeks (+/- 1 week). You should try to take the pill on the same day of the week. At the end of Cycle 2, blood (about 1 teaspoon) will be drawn to check Vitamin D levels. If your Vitamin D level is not high enough at this first Cycle 2 study visit, you will repeat the Cycle 2 dosing schedule a second time. At the end of this second Cycle 2 dosing schedule, you will have another blood test (about 1 teaspoon) to check your Vitamin D levels. If your Vitamin D level is not high enough, you will be taken off study. If your Vitamin D level is high enough after either your first or second Cycle 2 dosing schedule, you will go to Cycle 3. Cycle 3: During Cycle 3, the dosing schedule for Vitamin D is 2 pills per week for 6 weeks (+/- 1 week). At the end of Cycle 3, blood (about 1 teaspoon) will be drawn to check Vitamin D levels. If your Vitamin D level is high enough, you will have another 4DCT scan of your neck, for the purpose of this research study. This second scan will be used to see if your parathyroid glands have changed in size. Before this second scan, blood (about 1/2 teaspoon) will be drawn to check your kidney function. If your Vitamin D level is not high enough, you will be taken off study. Routine Surgical Treatment: Within 3 weeks after your second 4DCT scan, your routine surgery for PHPT will be performed. You will sign a separate consent form and its risks will be described in more detail at that time. Your removed parathyroid glands will examined. Length of Study: Your active participation in this study will be over after you have surgery. If the side effects of PHPT indicate that you may need to have parathyroid surgery earlier, you will be taken off study early and have the surgery as soon as possible. This is an investigational study. Vitamin D supplements are commercially available and FDA approved for use in patients with PHPT and a Vitamin D deficiency to bring the Vitamin D blood levels to normal before surgery. It is considered experimental to have a second 4DCT scan after your Vitamin D levels are high enough. Up to 22 patients will take part in this study. All will be enrolled at M. D. Anderson.

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Hyperparathyroidism
Keywords
Primary Hyperparathyroidism, PHPT, Parathyroid glands, Vitamin D deficiency, Vitamin D, Ergocalciferol

7. Study Design

Primary Purpose
Diagnostic
Study Phase
Phase 1
Interventional Study Model
Single Group Assignment
Masking
None (Open Label)
Allocation
N/A
Enrollment
22 (Anticipated)

8. Arms, Groups, and Interventions

Arm Title
Vitamin D
Arm Type
Experimental
Arm Description
Vitamin D starting dose 50,000 IU by mouth 3 times weekly for three weeks (+/- one week), then 50,000 IU twice weekly for 6 weeks (+/- one week).
Intervention Type
Drug
Intervention Name(s)
Vitamin D
Other Intervention Name(s)
Ergocalciferol
Intervention Description
Starting dose 50,000 IU by mouth 3 times weekly for three weeks (+/- one week), then 50,000 IU twice weekly for 6 weeks (+/- one week).
Intervention Type
Device
Intervention Name(s)
Four-dimensional computed tomography (4DCT)
Other Intervention Name(s)
4DCT, 4-D Computed Tomography
Intervention Description
Four-dimensional computed tomography (4DCT) scan of the neck.
Primary Outcome Measure Information:
Title
Size of parathyroid glands
Description
Size of individual gland recorded while only the gland with maximum size at baseline included for analysis of primary endpoint. With sample size of 22, a two-sided 95% confidence interval for mean changes in size of parathyroid glands will extend 2.09 from observed mean, assuming that standard deviation is known to be 5 and confidence interval is based on the z statistic. Parameters for parathyroid glands compared pre- and post-replacement on an individual, gland-by-gland basis.
Time Frame
Baseline to 3-months post treatment

10. Eligibility

Sex
All
Minimum Age & Unit of Time
21 Years
Accepts Healthy Volunteers
No
Eligibility Criteria
Inclusion Criteria: Be diagnosed with PHPT (inappropriate PTH level in the setting of a high or high-normal corrected serum calcium level equal to or greater than 10.0 mg/dL) Be considered an appropriate surgical candidate Be older than 21 years of age Have a vitamin D (25-OHD) level less than or equal to 20ng/ml Female participants of childbearing potential must have a negative pregnancy test (urinary or serum beta-HCG) within two weeks before signing consent Exclusion Criteria: Have any other functional tumors if they have familial multiple endocrine neoplasia syndrome 1 or 2 (MEN 1 or MEN 2) Have a corrected calcium level greater than 13mg/dL Have a recent history of kidney stones Have a recent history of pancreatitis Have a recent history of cardiac arrhythmia (eg atrial fibrillation) Unable to keep still for 2 minutes without coughing Having a body habitus that prevents adequate images to be obtained through the region of the parathyroids (ie typically weighing in excess of 250Lbs) Have a serum creatinine greater than 2.0 mg/dl Have hypersensitivity to ergocalciferol or any component of the formulation
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Nancy D. Perrier, MD
Organizational Affiliation
M.D. Anderson Cancer Center
Official's Role
Principal Investigator
Facility Information:
Facility Name
University of Texas MD Anderson Cancer Center
City
Houston
State/Province
Texas
ZIP/Postal Code
77030
Country
United States

12. IPD Sharing Statement

Links:
URL
http://www.mdanderson.org
Description
University of Texas MD Anderson Cancer Center Website

Learn more about this trial

Effects of Vitamin D Replacement in Patients With Primary Hyperparathyroidism (PHPT)

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