A Study of mRNA-3745 in Adult and Pediatric Participants With Glycogen Storage Disease Type 1a (GSD1a)

NCT ID: NCT05095727

Last Updated: 2025-12-15

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

PHASE1/PHASE2

Total Enrollment

15 participants

Study Classification

INTERVENTIONAL

Study Start Date

2022-06-01

Study Completion Date

2026-11-30

Brief Summary

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The main goal of this trial is to evaluate the safety and tolerability of mRNA-3745 via intravenous (IV) administration in adult and pediatric participants with GSD1a.

Detailed Description

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The study includes a single ascending dose (SAD) stage and a multiple ascending dose (MAD) stage. Participants enrolled in the MAD stage have the option to continue treatment in an open-label extension (OLE) period that will assess long-term safety and clinical activity of mRNA-3745.

Conditions

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Glycogen Storage Disease

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

SEQUENTIAL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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SAD: mRNA-3745

Participants will receive a single intravenous (IV) dose of mRNA-3745 on Day 1 in an inpatient setting. Participants that are/have been enrolled in the study and receive an administration of mRNA-3745 may also enroll in one of the MAD cohorts. The first MAD dose must occur at least 21 days after the SAD dose.

Group Type EXPERIMENTAL

mRNA-3745

Intervention Type DRUG

Sterile frozen liquid dispersion for injection

MAD: mRNA-3745

Participants will receive multiple IV doses of mRNA-3745 in an inpatient setting. Participants will have the option to continue treatment in the OLE.

Group Type EXPERIMENTAL

mRNA-3745

Intervention Type DRUG

Sterile frozen liquid dispersion for injection

Interventions

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mRNA-3745

Sterile frozen liquid dispersion for injection

Intervention Type DRUG

Eligibility Criteria

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Inclusion Criteria

* Documented GSD1a with confirmation of biallelic gene encoding glucose-6-phosphatase-α (G6PC) mutations by genetic testing.
* Absence of hospitalization for hypoglycemia in the 4 weeks prior to Screening

Exclusion Criteria

* Solid organ transplant
* Received gene therapy for GSD1a
* Presence of liver adenoma \>5 centimeters (cm) in size
* Diagnosis of type 1 or type 2 diabetes mellitus
* Presence of liver adenoma with growth of \>2 cm or \>5 newly diagnosed liver adenomas, in the previous 2 years
Minimum Eligible Age

6 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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ModernaTX, Inc.

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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University of Connecticut Health Center

Farmington, Connecticut, United States

Site Status

Boston Children's Hospital

Boston, Massachusetts, United States

Site Status

Duke University Medical Center

Durham, North Carolina, United States

Site Status

Cincinnati Children's Hospital Medical Center

Cincinnati, Ohio, United States

Site Status

Children's Hospital of Philadelphia

Philadelphia, Pennsylvania, United States

Site Status

The University of Texas Health Science Center at Houston

Houston, Texas, United States

Site Status

Baylor College of Medicine

Houston, Texas, United States

Site Status

University of Utah

Salt Lake City, Utah, United States

Site Status

Stollery Children's Hospital University of Alberta

Edmonton, Alberta, Canada

Site Status

The Hospital for Sick Children

Toronto, Ontario, Canada

Site Status

AP-HP - Hôpital Antoine Béclère

Clamart, , France

Site Status

CHRU Tours - Hopital Clocheville

Tours, , France

Site Status

Universitair Medisch Centrum Groningen

Groningen, , Netherlands

Site Status

Instytut Pomnik Centrum Zdrowia Dziecka

Warsaw, , Poland

Site Status

Hospital Universitario 12 de Octubre

Madrid, , Spain

Site Status

Hospital Regional Universitario de Malaga

Málaga, , Spain

Site Status

Countries

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United States Canada France Netherlands Poland Spain

References

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Cao J, Choi M, Guadagnin E, Soty M, Silva M, Verzieux V, Weisser E, Markel A, Zhuo J, Liang S, Yin L, Frassetto A, Graham AR, Burke K, Ketova T, Mihai C, Zalinger Z, Levy B, Besin G, Wolfrom M, Tran B, Tunkey C, Owen E, Sarkis J, Dousis A, Presnyak V, Pepin C, Zheng W, Ci L, Hard M, Miracco E, Rice L, Nguyen V, Zimmer M, Rajarajacholan U, Finn PF, Mithieux G, Rajas F, Martini PGV, Giangrande PH. mRNA therapy restores euglycemia and prevents liver tumors in murine model of glycogen storage disease. Nat Commun. 2021 May 25;12(1):3090. doi: 10.1038/s41467-021-23318-2.

Reference Type BACKGROUND
PMID: 34035281 (View on PubMed)

Other Identifiers

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2022-502963-39-00

Identifier Type: REGISTRY

Identifier Source: secondary_id

mRNA-3745-P102

Identifier Type: -

Identifier Source: org_study_id

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