NCT07699471 · MBX Biosciences
A Study to Investigate Canvuparatide Compared With Placebo in Adult Patients With Hypoparathyroidism
What this study is about
The purpose of this study is to investigate the effectiveness and safety of canvuparatide administered as a once-weekly (QW) treatment to adult study participants with hypoparathyroidism (HypoPT).
View original scientific description
The purpose of this study is to investigate the efficacy and safety of canvuparatide administered as a once-weekly (QW) treatment to adult study participants with hypoparathyroidism (HypoPT).
Interventions
DRUG
Canvuparatide
• Drug per vial: Each DDC contains 1 vial of lyophilized drug product. The reconstituted strengths are 400 μg/mL, 600 μg/mL, 800 μg/mL, 1000 μg/mL, 1200 μg/mL, 1400 μg/mL, and 1600 μg/mL.
OTHER
Placebo
• Drug per vial: Each DDC contains 1 vial of lyophilized drug product. The reconstituted strengths are 400 μg/mL, 600 μg/mL, 800 μg/mL, 1000 μg/mL, 1200 μg/mL, 1400 μg/mL, and 1600 μg/mL.
Primary outcome measures
To evaluate the effect of pooled weekly doses of canvuparatide on the proportion of responder patients at week 26.
Time frame: 26 Weeks
Responder status is defined as a study participant who meets the following composite criteria: * Independence from active vitamin D * Independence from therapeutic doses of calcium (standing elemental calcium dose of ≤ 600 mg/day) * 2 consecutive albumin-adjusted serum calcium results in the normal range (8.3-10.6 mg/dL) (2.07-2.64 mmol/L) * No increase in study drug
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Is an adult ≥18 years of age.
- Has a documented diagnosis of post-surgical, chronic HypoPT or genetic, idiopathic, or autoimmune HypoPT for at least 12 months prior to screening.
- Intact PTH level below the median value of the normal range
- Minimum requirement for a dose of calcitriol ≥0.5 μg/day, or alfacalcidol ≥1.0 μg/day and (elemental) calcium ≥1000 mg/day for at least 12 weeks prior to screening. In addition, the doses of calcitriol, or alfacalcidol, and calcium should be stable for at least 3 weeks prior to screening.
- Two (2) consecutive measurements of albumin-adjusted serum calcium at least 1 week apart within the range of 7.8 to 9.4 mg/dL (1.95 to 2.35 mmol/L). Key
Exclusion criteria
- Has a known history of pseudohypoparathyroidism
- Clinically significant abnormal hematology, clinical chemistry, or coagulation.
- Any disease that might affect calcium metabolism or calcium-phosphate homeostasis or PTH levels other than HypoPT, such as active endogenous hyperthyroidism;
- Use of therapies affecting the calcium metabolism within 4 weeks prior to randomization
- PTH or PTH-related protein drugs such as PTH(1-84) and PTH(1-34) within 5 weeks prior to screening.
Where
- Los Angeles, California
- Homestead, Florida
- Las Vegas, Nevada
- Reno, Nevada
- Greenville, North Carolina
- Dallas, Texas
- Round Rock, Texas
- Shavano Park, Texas
- Weslaco, Texas
- Spokane, Washington
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Aug 27, 2026 · Source of record for eligibility and locations