Clinical and Basic Investigations into Phosphomannomutase deficiency (PMM2-CDG) This is a natural history (observational) protocol designed to collect clinical and biological information in patients with PMM2-CDG (CDG-Ia). Data from this natural history study will be used to determine a set of clinical and biological parameters that will be used for primary and secondary endpoints in a later clinical trial with a new chemical entity, GLM101.



Eligible Ages
All ages
Eligible Genders
Accepts Healthy Volunteers

Inclusion Criteria

  • Informed consent/assent by the patient and/or their legally authorized representative
  • Confirmed diagnosis of PMM2-CDG, based on enzymatic or molecular tests
  • Willing and able to adhere to study requirements described in the protocol and consent/assent documents

Exclusion Criteria

  • Known or suspected differential diagnosis of any other known CDG (not PMM2-CDG)
  • Plan to use investigational drug during study participation
  • Blood loss of >250 mL or donated blood within 56 days, or donated plasma within 7 days, of study screening

Study Design

Study Type
Observational Model
Time Perspective

Recruiting Locations

More Details

Glycomine, Inc.

Study Contact

Horacio Plotkin, MD / Chief Medical Officer
+1 (781) 290-3722

Detailed Description

Subjects enrolled in this natural history study will be thoroughly examined for signs and symptoms of PMM2-CDG. Medical history, physical examination, laboratory testing and imaging studies will be performed during a single consultation. Follow-up will occur every 6 months at a minimum, depending on the standard of care at the investigator's institution as well as the clinical status of the individual patient. All medical procedures are routine. No new therapy is offered as part of this study, and no change in the patients' routine therapy is dictated by this protocol. No randomization will be performed.

Since no new therapy is offered as part of this study and no change in the patients' routine therapy is dictated by this protocol, only Serious Adverse Events potentially related to a procedure specifically requested (if any) by this natural history study will need to be reported to the Sponsor. However, all non-serious adverse events will be recorded in the natural history (observational) study CRF database, in order to be considered as a reference for the planned clinical trial to occur later on under a separate protocol.


Study information shown on this site is derived from ClinicalTrials.gov (a public registry operated by the National Institutes of Health). The listing of studies provided is not certain to be all studies for which you might be eligible. Furthermore, study eligibility requirements can be difficult to understand and may change over time, so it is wise to speak with your medical care provider and individual research study teams when making decisions related to participation.