Pompe DiseaseIPANEMANCT02838368
Investigating Pompe Prevalence in Neuromuscular Medicine Academic Practices
An observational study of Pompe Disease, run by University of California, Irvine at 1 site in United States.
Trial summary
The incidence of type II glycogen-storage disease (Pompe disease) varies depending on ethnicity and geographic region. As of 2010, nine studies have been published documenting the incidence of Pompe disease. It is most common within the African American population, with an incidence of 1 in 14,000. In the U.S. Read more about this study
- Who is it for?
- Ages 8 years and older
- Conditions the study is for
- Pompe Disease
- How many people
- 921 participants
- Where
- 1 siteUnited States
- Study dates
- Jul 2015to 1 Dec 2018
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 8 years and older
- All sexes
- No healthy volunteers
- Child, Adult, Older adult
Study population: Patients age of 8 years and older suspected of late-onset Pompe disease.
Who may be able to join
- Age 8 years or older.
- Geographically accessible to one of the sites.
- One of these following three clinical situations: Complaint of proximal muscle weakness with or without elevation in creatinine kinase (CK); neck muscle weakness (either flexor or extensor) with or without elevation in CK; or elevation of CK in isolation.
- Capable and willing to provide informed consent or assent and follow study procedures.
Who cannot join
- Less than 8 years of age.
- Subjects with an alternative neuromuscular diagnosis that is responsible for subject's symptoms
- Incapable or unwilling to provide informed consent and to follow research procedures.
Trial locations and contacts
1 site in 1 country.
United States1 site
University of California, Irvine
Irvine, California, 92868
About this study
The incidence of type II glycogen-storage disease (Pompe disease) varies depending on ethnicity and geographic region. As of 2010, nine studies have been published documenting the incidence of Pompe disease. It is most common within the African American population, with an incidence of 1 in 14,000. In the U.S. more broadly speaking, the combined incidence of all three variants of the disease is 1 in 40,000. These estimates relied on the frequencies of three mutations in the gene acid alpha-glucosidase (GAA), leading to variants of the disease. Criteria for inclusion in the studies were often non-selective; in many cases, molecular genetic screening was done at birth. With such a high prevalence of Pompe disease reported, it is expected that large university medical centers specializing in neuromuscular diseases would see a higher incidence of Pompe disease among their patients. From a comparable Italian multicenter study, it appears that Pompe disease accounts for 3% of all patients presenting with proximal weakness with or without CK elevation.
This study will measure the incidence of Pompe disease based on manifest laboratory abnormality, namely low GAA enzyme activity. Analysis of GAA enzyme activity will be determined through a blood sample of 4 mL. The study seeks to measure the epidemiology of Pompe disease by symptomatically screening all patients who present with symptoms of hitherto undiagnosed proximal weakness with or without elevation of the muscle enzyme, creatinine kinase (CK), or elevation of CK alone, at thirteen academic tertiary neuromuscular practices throughout the United States and Canada. Total recruitment is expected to be ~1,500 participants. It is anticipated that the number of incident Pompe cases in this cohort would be between 3-5%, i.e. 45-75 newly diagnosed cases of Pompe disease.
- Conditions
- Pompe Disease
- Medical subject headings
- Glycogen Storage Disease Type II
What is being measured
The primary outcome is the main question the study is designed to answer.
The true incidence of Pompe disease among patients seen at neuromuscular clinics.
Measured: Two years
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted20 Jul 2016 (estimated)
- Study startJul 2015
- Primary completionJul 2018
- Study completion1 Dec 2018
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (6)Papers the sponsor has linked to this study.
- Other trials for Pompe DiseaseStudies of the same condition, open and under way.
- More trials run by University of California, IrvineThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Case only
- Time perspective
- Prospective
- Enrolment
- 921 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of California, Irvine
- Sponsor type
- University, hospital or other
- Collaborators
- Genzyme, a Sanofi Company
- Responsible party
- Principal investigator, Tahseen Mozaffar, University of California, Irvine
- Investigators
- Tahseen Mozaffar, MD, Principal investigator, University of California, Irvine
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02838368
- Sponsor's protocol ID
- UCI-Ipanema
- Acronym
- IPANEMA
- Status last verified
- Aug 2018
- First submitted
- 12 May 2016
- Last updated
- 25 Feb 2019
- Results posted
- No
- Data monitoring committee
- No
Publications
Cupler EJ, Berger KI, Leshner RT, Wolfe GI, Han JJ, Barohn RJ, Kissel JT; AANEM Consensus Committee on Late-onset Pompe Disease. Consensus treatment recommendations for late-onset Pompe disease. Muscle Nerve. 2012 Mar;45(3):319-33. doi: 10.1002/mus.22329. Epub 2011 Dec 15.
PubMed 22173792Sperry E, Leslie N, Berry L, Pena L. Pompe Disease. 2007 Aug 31 [updated 2025 Aug 21]. In: Adam MP, Bick S, Mirzaa GM, Wallace SE, Amemiya A, editors. GeneReviews(R) [Internet]. Seattle (WA): University of Washington, Seattle; 1993-2026. Available from http://www.ncbi.nlm.nih.gov/books/NBK1261/
PubMed 20301438Hirschhorn R, Reuser AJ. Glycogen storage disease type II: acid alpha-glucosidase (acid maltase) deficiency. In: Scriver CR, Beaudet A, Sly WS, Valle D, eds. The Metabolic and Molecular Bases of Inherited Disease. New York, NY: McGraw-Hill; 2001:3389-420.
Martiniuk F, Chen A, Mack A, Arvanitopoulos E, Chen Y, Rom WN, Codd WJ, Hanna B, Alcabes P, Raben N, Plotz P. Carrier frequency for glycogen storage disease type II in New York and estimates of affected individuals born with the disease. Am J Med Genet. 1998 Aug 27;79(1):69-72. doi: 10.1002/(sici)1096-8628(19980827)79:13.0.co;2-k. No abstract available.
PubMed 9738873Musumeci O, la Marca G, Spada M, Mondello S, Danesino C, Comi GP, Pegoraro E, Antonini G, Marrosu G, Liguori R, Morandi L, Moggio M, Massa R, Ravaglia S, Di Muzio A, Filosto M, Tonin P, Di Iorio G, Servidei S, Siciliano G, Angelini C, Mongini T, Toscano A; Italian GSD II group. LOPED study: looking for an early diagnosis in a late-onset Pompe disease high-risk population. J Neurol Neurosurg Psychiatry. 2016 Jan;87(1):5-11. doi: 10.1136/jnnp-2014-310164. Epub 2015 Mar 17.
PubMed 25783438Wencel M, Shaibani A, Goyal NA, Dimachkie MM, Trivedi J, Johnson NE, Gutmann L, Wicklund MP, Bandyopadhay S, Genge AL, Freimer ML, Goyal N, Pestronk A, Florence J, Karam C, Ralph JW, Rasheed Z, Hays M, Hopkins S, Mozaffar T. Investigating Late-Onset Pompe Prevalence in Neuromuscular Medicine Academic Practices: The IPaNeMA Study. Neurol Genet. 2021 Oct 18;7(6):e623. doi: 10.1212/NXG.0000000000000623. eCollection 2021 Dec.
PubMed 36299500
Study at a glance
From the registry record, last updated by the sponsor on 25 Feb 2019. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Investigating Pompe Prevalence in Neuromuscular Medicine Academic Practices
- ClinicalTrials.gov ID
- NCT02838368
- Acronym / sponsor ID
- IPANEMA / UCI-Ipanema
- Conditions
- Pompe Disease
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 921 participants (actual)
- Lead sponsor
- University of California, IrvineUniversity, hospital or other
- Collaborators
- Genzyme, a Sanofi Company
- Study start
- Jul 2015 (actual)
- Primary completion
- Jul 2018 (actual)
- Study completion
- 1 Dec 2018 (actual)
- First posted
- 20 Jul 2016 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The incidence of type II glycogen-storage disease (Pompe disease) varies depending on ethnicity and geographic region. As of 2010, nine studies have been published documenting the incidence of Pompe disease. It is most common within the African American population, with an incidence of 1 in 14,000. In the U.S. more broadly speaking, the combined incidence of all three variants of the disease is 1 in 40,000. These estimates relied on the frequencies of three mutations in the gene acid alpha-glucosidase (GAA), leading to variants of the disease. Criteria for inclusion in the studies were often non-selective; in many cases, molecular genetic screening was done at birth. With such a high prevalence of Pompe disease reported, it is expected that large university medical centers specializing in neuromuscular diseases would see a higher incidence of Pompe disease among their patients. From a comparable Italian multicenter study, it appears that Pompe disease accounts for 3% of all patients presenting with proximal weakness with or without CK elevation.
This study will measure the incidence of Pompe disease based on manifest laboratory abnormality, namely low GAA enzyme activity. Analysis of GAA enzyme activity will be determined through a blood sample of 4 mL. The study seeks to measure the epidemiology of Pompe disease by symptomatically screening all patients who present with symptoms of hitherto undiagnosed proximal weakness with or without elevation of the muscle enzyme, creatinine kinase (CK), or elevation of CK alone, at thirteen academic tertiary neuromuscular practices throughout the United States and Canada. Total recruitment is expected to be ~1,500 participants. It is anticipated that the number of incident Pompe cases in this cohort would be between 3-5%, i.e. 45-75 newly diagnosed cases of Pompe disease.
Study design
- Observational model
- Case only
- Time perspective
- Prospective
Who may qualify
- Ages
- 8 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child, Adult, Older adult
- Study population
- Patients age of 8 years and older suspected of late-onset Pompe disease.
Key inclusion criteria (4 listed)
- Age 8 years or older.
- Geographically accessible to one of the sites.
- One of these following three clinical situations: Complaint of proximal muscle weakness with or without elevation in creatinine kinase (CK); neck muscle weakness (either flexor or extensor) with or without elevation in CK; or elevation of CK in isolation.
- Capable and willing to provide informed consent or assent and follow study procedures.
Key exclusion criteria (3 listed)
- Less than 8 years of age.
- Subjects with an alternative neuromuscular diagnosis that is responsible for subject's symptoms
- Incapable or unwilling to provide informed consent and to follow research procedures.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
The true incidence of Pompe disease among patients seen at neuromuscular clinics.
Time frame: Two years
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 25 Feb 2019.
- Background: PubMed 22173792Cupler EJ, Berger KI, Leshner RT, Wolfe GI, Han JJ, Barohn RJ, Kissel JT; AANEM Consensus Committee on Late-onset Pompe Disease. Consensus treatment recommendations for late-onset Pompe disease. Muscle Nerve. 2012 Mar;45(3):319-33. doi: 10.1002/mus.22329. Epub 2011 Dec 15.
- Background: PubMed 20301438Sperry E, Leslie N, Berry L, Pena L. Pompe Disease. 2007 Aug 31 [updated 2025 Aug 21]. In: Adam MP, Bick S, Mirzaa GM, Wallace SE, Amemiya A, editors. GeneReviews(R) [Internet]. Seattle (WA): University of Washington, Seattle; 1993-2026. Available from http://www.ncbi.nlm.nih.gov/books/NBK1261/
- BackgroundHirschhorn R, Reuser AJ. Glycogen storage disease type II: acid alpha-glucosidase (acid maltase) deficiency. In: Scriver CR, Beaudet A, Sly WS, Valle D, eds. The Metabolic and Molecular Bases of Inherited Disease. New York, NY: McGraw-Hill; 2001:3389-420.
- Background: PubMed 9738873Martiniuk F, Chen A, Mack A, Arvanitopoulos E, Chen Y, Rom WN, Codd WJ, Hanna B, Alcabes P, Raben N, Plotz P. Carrier frequency for glycogen storage disease type II in New York and estimates of affected individuals born with the disease. Am J Med Genet. 1998 Aug 27;79(1):69-72. doi: 10.1002/(sici)1096-8628(19980827)79:13.0.co;2-k. No abstract available.
- Background: PubMed 25783438Musumeci O, la Marca G, Spada M, Mondello S, Danesino C, Comi GP, Pegoraro E, Antonini G, Marrosu G, Liguori R, Morandi L, Moggio M, Massa R, Ravaglia S, Di Muzio A, Filosto M, Tonin P, Di Iorio G, Servidei S, Siciliano G, Angelini C, Mongini T, Toscano A; Italian GSD II group. LOPED study: looking for an early diagnosis in a late-onset Pompe disease high-risk population. J Neurol Neurosurg Psychiatry. 2016 Jan;87(1):5-11. doi: 10.1136/jnnp-2014-310164. Epub 2015 Mar 17.
- Derived from this study: PubMed 36299500Wencel M, Shaibani A, Goyal NA, Dimachkie MM, Trivedi J, Johnson NE, Gutmann L, Wicklund MP, Bandyopadhay S, Genge AL, Freimer ML, Goyal N, Pestronk A, Florence J, Karam C, Ralph JW, Rasheed Z, Hays M, Hopkins S, Mozaffar T. Investigating Late-Onset Pompe Prevalence in Neuromuscular Medicine Academic Practices: The IPaNeMA Study. Neurol Genet. 2021 Oct 18;7(6):e623. doi: 10.1212/NXG.0000000000000623. eCollection 2021 Dec.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Tahseen Mozaffar, MD principal investigator
University of California, Irvine
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Pompe Disease, run by University of California, Irvine at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 3 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 25 Feb 2019. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
The true incidence of Pompe disease among patients seen at neuromuscular clinics. (time frame: Two years). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT02838368, which also lists 6 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 25 Feb 2019; AzTrials last refreshed its copy on 7 Nov 2026.