Extension Study to Evaluate the Long-Term Safety and Tolerability of MBX 2109 in Patients With Hypoparathyroidism

NCT ID: NCT06531941

Last Updated: 2025-10-28

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

ACTIVE_NOT_RECRUITING

Clinical Phase

PHASE2

Total Enrollment

60 participants

Study Classification

INTERVENTIONAL

Study Start Date

2024-10-31

Study Completion Date

2027-05-27

Brief Summary

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The purpose of this study is to evaluate the long-term safety and tolerability of MBX 2109 in patients with hypoparathyroidism who completed the 12-week treatment period in the Phase 2 study, MBX-2H1002.

Detailed Description

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This study is to investigate the long-term safety and tolerability of MBX 2109 administered once weekly to patients with hypoparathyroidism. Additionally, the ability of MBX 2109 to maintain serum calcium levels within the normal range without the need for active vitamin D and to reduce elemental calcium supplements to ≤600 mg/day.

Conditions

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Hypoparathyroidism

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

CROSSOVER

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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400 µg once-weekly by subcutaneous injection

Group Type EXPERIMENTAL

400 µg of MBX 2109 once-weekly by subcutaneous injection

Intervention Type DRUG

Supplied as 1.5 mg per vial, to be reconstituted in 1.4 mL water for injection (diluent) to a concentration of 1.0 mg/mL.

Patients who received Placebo in the Phase 2 MBX-2H1002 study, will initiate treatment with 400 µg subcutaneous MBX 2109 once-weekly

200-1600 µg once-weekly by subcutaneous injection

Group Type EXPERIMENTAL

200-1600 µg of MBX 2109 once-weekly by subcutaneous injection

Intervention Type DRUG

Supplied as 1.5 mg per vial, to be reconstituted in 1.4 mL water for injection (diluent) to a concentration of 1.0 mg/mL.

Patients treated with MBX 2109 in the Phase 2 MBX-2H1002 study will continue at the screening visit in the extension study on the same dose they were receiving at the Week 11 Visit in Study MBX-2H1002.

The maximum allowed dose is 1600 μg weekly administered subcutaneously in the abdomen, rotating injection sites. Doses of MBX 2109 study drug greater than 1000 μg will be administered subcutaneously in two separate, equal injections.

Interventions

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400 µg of MBX 2109 once-weekly by subcutaneous injection

Supplied as 1.5 mg per vial, to be reconstituted in 1.4 mL water for injection (diluent) to a concentration of 1.0 mg/mL.

Patients who received Placebo in the Phase 2 MBX-2H1002 study, will initiate treatment with 400 µg subcutaneous MBX 2109 once-weekly

Intervention Type DRUG

200-1600 µg of MBX 2109 once-weekly by subcutaneous injection

Supplied as 1.5 mg per vial, to be reconstituted in 1.4 mL water for injection (diluent) to a concentration of 1.0 mg/mL.

Patients treated with MBX 2109 in the Phase 2 MBX-2H1002 study will continue at the screening visit in the extension study on the same dose they were receiving at the Week 11 Visit in Study MBX-2H1002.

The maximum allowed dose is 1600 μg weekly administered subcutaneously in the abdomen, rotating injection sites. Doses of MBX 2109 study drug greater than 1000 μg will be administered subcutaneously in two separate, equal injections.

Intervention Type DRUG

Eligibility Criteria

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Inclusion Criteria

1. Must have completed the Week 12 Visit in MBX-2H1002 Study.
2. Is an adult ≥18 years of age at the time of the Screening visit of this extension study.
3. Has a diagnosis of one of the following types of hypoparathyroidism for at least 26 weeks prior to the

Screening visit:
1. Postsurgical chronic hypoparathyroidism
2. Idiopathic hypoparathyroidism
3. Autoimmune hypoparathyroidism
4. Can comprehend and is willing to sign an informed consent form (ICF), and abide by the study restrictions, study visits, and procedures.
5. In the opinion of the investigator, must be able to successfully demonstrate reconstitution and self-administration of study drug.
Minimum Eligible Age

18 Years

Maximum Eligible Age

100 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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MBX Biosciences

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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MBX Biosciences Investigational Site

Miami, Florida, United States

Site Status

MBX Biosciences Investigational Site

Macon, Georgia, United States

Site Status

MBX Biosciences Investigational Site

Jackson, Mississippi, United States

Site Status

MBX Biosciences Investigational Site

St Louis, Missouri, United States

Site Status

MBX Biosciences Investigational Site

Las Vegas, Nevada, United States

Site Status

MBX Biosciences Investigational Site

Reno, Nevada, United States

Site Status

MBX Biosciences Investigational Site

Albany, New York, United States

Site Status

MBX Biosciences Investigational Site

New York, New York, United States

Site Status

MBX Biosciences Investigational Site

The Bronx, New York, United States

Site Status

MBX Biosciences Investigational Site

Columbus, Ohio, United States

Site Status

MBX Biosciences Investigational Site

Dallas, Texas, United States

Site Status

MBX Biosciences Investigational Site

El Paso, Texas, United States

Site Status

MBX Biosciences Investigational Site

Fort Worth, Texas, United States

Site Status

MBX Biosciences Investigational Site

Round Rock, Texas, United States

Site Status

MBX Biosciences Investigational Site

San Antonio, Texas, United States

Site Status

MBX Biosciences Investigational Site

Weslaco, Texas, United States

Site Status

MBX Biosciences Investigational Site

Madison, Wisconsin, United States

Site Status

MBX Biosciences Investigational Site

Ciudad Autonoma de Buenos Aires, Buenos Aires, Argentina

Site Status

MBX Biosciences Investigational Site

Ciudad Autonoma de Buenos Aires, Buenos Aires, Argentina

Site Status

MBX Biosciences Investigational Site

Córdoba, Río Cuarto, Argentina

Site Status

MBX Biosciences Investigational Site

Córdoba, , Argentina

Site Status

MBX Biosciences Investigational Site

San Miguel de Tucumán, , Argentina

Site Status

MBX Biosciences Investigational Site

Samsun, , Turkey (Türkiye)

Site Status

Countries

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United States Argentina Turkey (Türkiye)

Other Identifiers

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MBX-2H1004

Identifier Type: -

Identifier Source: org_study_id

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