"The MaP Study": Mapping the Patient Journey in MMA and PA
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The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. |
ClinicalTrials.gov Identifier: NCT03484767 |
Recruitment Status :
Completed
First Posted : April 2, 2018
Last Update Posted : August 2, 2021
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Condition or disease |
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Methylmalonic Acidemia Propionic Acidemia |
Study Type : | Observational |
Actual Enrollment : | 97 participants |
Observational Model: | Cohort |
Time Perspective: | Prospective |
Official Title: | A Longitudinal, Exploratory, Natural History Study to Further Characterize and Describe the Signs and Symptoms of Patients With Organic Acidemias |
Actual Study Start Date : | March 20, 2018 |
Actual Primary Completion Date : | May 29, 2021 |
Actual Study Completion Date : | May 29, 2021 |

Group/Cohort |
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Methylmalonic Acidemia Participants
Individuals with isolated MMA (mut0 and mut-)
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Propionic Acidemia Participants
Individuals with isolated PA
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- Change in plasma methylmalonic acid levels (MMA only) [ Time Frame: Baseline through 12 months ]
- Frequency of disease related clinical events in enrolled participants (mut0 and mut- MMA patients) [ Time Frame: Baseline through 12 months ]
- Changes in plasma 2-MC levels (PA only) [ Time Frame: Baseline through 12 months ]
- Changes in plasma 3-HP levels (PA only) [ Time Frame: Baseline through 12 months ]
- Frequency of disease related clinical events in enrolled participants (PA patients) [ Time Frame: Baseline through 12 months ]

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Ages Eligible for Study: | Child, Adult, Older Adult |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Sampling Method: | Non-Probability Sample |
Inclusion Criteria:
MMA Only • Patient has a confirmed diagnosis of isolated MMA due to MUT deficiency (mut0 or mut-) based on the following criteria:
- Elevated plasma/serum/DBS or urine methylmalonic acid levels
- Presence of normal serum/plasma vitamin B12 and plasma homocysteine levels
- Confirmed by molecular genetic testing. Genetic testing can be performed after the administration of informed consent if not available, however, molecular genetic results must be confirmed before the second study visit
PA Only
• Patient has a confirmed diagnosis of isolated PA based on the following criteria:
- Elevated plasma/DBS/urine 2-MC and/or 3-HP
- Elevated plasma/serum/DBS propionylcarnitine (C3)
- Confirmed by genetic testing for mutations of the PCCA or PCCB genes. Genetic testing can be performed after the administration of informed consent if not available, however, molecular genetic results must be confirmed before the second study visit
Both MMA and PA
- Patient (and/or legally authorized representative as applicable to local regulations) is willing and able to comply with study-related assessments and activities
- Patient or legally authorized representative is willing and able to provide informed consent and/or assent as mandated by local regulation
Exclusion Criteria:
- Estimated GFR <30 mL/min/1.73m2 based on age appropriate equations or patients who undergo chronic dialysis
- The patient is pregnant or lactating at the time of screening. (Note: Patients who become pregnant during the study may remain in the study) MMA Only
- Patients diagnosed with isolated MMA cblA, cblB, or cblD enzymatic subtypes or methylmalonyl-CoA epimerase deficiency or combined MMA with homocystinuria PA Only
- Patient has a confirmed diagnosis of multiple carboxylase deficiency

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03484767

Responsible Party: | ModernaTX, Inc. |
ClinicalTrials.gov Identifier: | NCT03484767 |
Other Study ID Numbers: |
mRNA-3704-P001 |
First Posted: | April 2, 2018 Key Record Dates |
Last Update Posted: | August 2, 2021 |
Last Verified: | July 2021 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Studies a U.S. FDA-regulated Drug Product: | No |
Studies a U.S. FDA-regulated Device Product: | No |
methylmalonic acidemia MMA organic acidemia mut deficiency inborn errors of metabolism mut0 |
mut- PA PCCA PCCB propionic acidemia |
Propionic Acidemia Acidosis Acid-Base Imbalance Metabolic Diseases |
Amino Acid Metabolism, Inborn Errors Metabolism, Inborn Errors Genetic Diseases, Inborn |