Rett SyndromeNCT02705677
Biobanking of Rett Syndrome and Related Disorders
An observational study of Rett Syndrome and MECP2 Duplication, run by University of Alabama at Birmingham at 12 sites in United States.
Trial summary
The overarching purpose of this study is to advance understanding of the natural history of Rett syndrome (RTT), MECP2-duplication disorder (MECP2 Dup), RTT-related disorders including CDKL5, FOXG1, and individuals with MECP2 mutations who do not have RTT. Read more about this study
- Who is it for?
- Any age
- Conditions the study is for
- Rett Syndrome, MECP2 Duplication, CDKL5
- How many people
- 752 participants
- Where
- 12 sitesUnited States
- Study dates
- 1 Sep 2017to 31 Jul 2021
- 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 Any age
- All sexes
- No healthy volunteers
- Child, Adult, Older adult
Study population: Females and males of all ages must have complete testing for MECP2, FOXG1, and CDKL5 genes mutations AND must meet these requirements: Gene positive for a sequence mutation, duplication or deletion in one of these 3 genes. OR Meet consensus criteria for Rett syndrome (typical or atypical)
Who may be able to join
- Individuals of both genders and of all ages, with RTT, MECP2 Dup, and, RTT-related disorders including those with mutations or deletions in CDKL5 and FOXG1 genes, or those with RTT (atypical or typical) who are mutation negative. Additionally, unaffected family members of those people who meet the disease specific criteria stated will eligible.
Who cannot join
- Individuals who do not meet the above criteria will be excluded.
Trial locations and contacts
12 sites in 1 country.
12 sites in 1 country
United States12 sites
University of Alabama at Birmingham
Birmingham, Alabama, 35294
Children's Hospital Boston
Boston, Massachusetts, 02115
Rush University Medical Center
Chicago, Illinois, 60612
University of Colorado Denver
Denver, Colorado, 80045-2571
Greenwood Genetic Center
Greenwood, South Carolina, 29646
Baylor College of Medicine
Houston, Texas, 77030
Gillette Children's Specialty Healthcare
Minneapolis, Minnesota, 55101
Vanderbilt University
Nashville, Tennessee, 37212
UCSF Benioff Children's Hospital Oakland
Oakland, California, 94709
Children's Hospital of Philadelphia
Philadelphia, Pennsylvania, 19104-4318
University of California San Diego
San Diego, California, 92123
Washington University School of Medicine and St. Louis Children's Hospital
St Louis, Missouri, 63110-1093
About this study
Official title: Biobanking of Rett Syndrome and Related Disorders Protocol
The overarching purpose of this study is to advance understanding of the natural history of Rett syndrome (RTT), MECP2-duplication disorder (MECP2 Dup), RTT-related disorders including CDKL5, FOXG1, and individuals with MECP2 mutations who do not have RTT. Although all these disorders are the result of specific genetic changes, there remains broad clinical variation that is not entirely accounted for by known biological factors. Additionally, clinical investigators currently do not have any biomarkers of disease status, clinical severity, or responsiveness to therapeutic intervention. To address these issues, biological materials (DNA, RNA, plasma, cell lines) will be collected from affected individuals and in some cases from unaffected family members, initial evaluation performed to identify additional biological factors contributing to disease severity, and these materials will be stored for future characterization.
Read the detailed description
At the present time, effective treatments for RTT, MECP2 Dup, or Rett-related disorders are lacking. Investigators have made substantial progress in RTT over the past eleven years such that this study represents a narrowing of focus to mutations or duplications of the MECP2 gene and related disorders, including those with phenotypic overlap. Understanding of RTT has advanced remarkably well through the Rett Syndrome Natural History Clinical Protocol (NHS) and correspondingly advancement in the basic science realm has moved forward with equivalent success. Thus, progress in clinical and basic science has led to the establishment of clinical trials and other translational studies that hold promise for additional clinical trials in future. In the process, however, investigators became aware of additional MECP2- and RTT-related disorders that were unknown at the time the original proposal was conceived and further were impressed by the substantial clinical variability in individuals with RTT that cannot be explained by differences in mutations alone. In fact, variability among individuals with identical mutations has led investigators to search for additional explanations. At the time of the initial application (2002), just three years after the identification of the gene, MECP2, as the molecular link to RTT, investigators were not aware of the variation in clinical disorders related to MECP2 mutations or to the related but quite different MECP2 Dup. Each disorder is characterized by significant neurodevelopmental features related either to alterations in the MECP2 gene or related to phenotypes closely resembling those seen in individuals with RTT. Further, the phenotypic overlap with RTT due to mutations in CDKL5 and FOXG1 was also unexplored. The investigators propose in this new study to build on the substantial progress made in understanding both classic and variant RTT and to add these related disorders, MECP2 Dup and the Rett-related disorders including CDKL5, FOXG1, and individuals with MECP2 mutations who do not have RTT. In conjunction with the longitudinal clinical assessment performed via the natural history component, investigators will systematically collect from all willing participant's blood and isolate plasma, DNA, and RNA. All participants in the Natural History Study will be asked to contribute samples at the initial visit, whereas samples will be collected repeatedly on a subset of participants in order to look for changes over time. In order to identify factors that distinguish between affected and unaffected individuals, as well as to have the potential to characterize the heritability and potential consequences of genetic changes in families, samples will be collected from unaffected family members. Additionally, on a subset of individuals chosen because of unique clinical features skin biopsies and/or hair follicles will be collected to establish cell lines. Investigators will ask all individuals providing samples to agree to potential future whole-genome sequencing in order to be able to potentially evaluate for genetic modifiers of these diseases.
These materials will be stored at a central repository (Greenwood Genetics Laboratory). The main purpose of these samples is to serve as durable materials for future analyses, however, a set of defined analyses will be performed on all samples. For the samples collected in the Rett syndrome cohort, investigators will perform X-chromosome inactivation studies and evaluate common polymorphisms in Brain derived neurotrophic factor (BDNF) and determine the contribution of these known factors to disease severity. For MECP2 Dup cohort investigators will characterize inflammatory markers in the plasma and correlate these with clinical features. Also for MECP2 Dup cohort investigators will perform detailed genomic breakpoint and gene content analysis and correlate this with disease severity. Similar analysis of genomic breakpoints and gene content will be performed on people with FOXG1 Duplications. Finally, in a pilot study, investigators will perform metabolic profiling on people from all disorders and evaluate for metabolic features correlated with disease severity, and metabolic features common or unique between these disorders. This work will provide a durable resource for future analysis, extend understanding of genotype/phenotype correlations, identify other biological factors contributing to disease severity, as well as provide the framework for the development of biomarkers of disease state and severity.
- Conditions
- Rett Syndrome, MECP2 Duplication, CDKL5, FOXG1 Disorders
- Medical subject headings
- Rett Syndrome
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
| Study group | Role | What they receive |
|---|---|---|
| Rett syndrome | This is a biobanking project for individuals with mutations in MECP2 or meeting diagnostic criteria for classic (typical) or variant (atypical) Rett syndrome in order to identify other genetic factors such as X-chromosome inactivation or genetic background that may explain the variations noted in these individuals, including those with the same MECP2 mutation. No interventions are anticipated. | |
| MECP2 Duplication disorder | This is a biobanking project for individuals with MECP2 duplications to understand the difference in the size of the duplication and the potential impact of other genes in the duplicated segment. No interventions are anticipated. | |
| Rett-related disorders: CDKL5, FOXG1 | This is a biobanking project for individuals with mutations in MECP2, CDKL5, and FOXG1 to understand the interplay of mutations in these individuals and the resultant phenotypic expression; for example, individuals with mutations in MECP2 but not meeting diagnostic criteria for Rett syndrome or individuals with mutations in CDKL5 or FOXG1 who may or may not meet diagnostic criteria for atypical Rett syndrome. No interventions are anticipated. |
What is being measured
The primary outcome is the main question the study is designed to answer.
X-chromosome inactivation in Rett syndrome (RTT)
Characterize X-chromosome inactivation in RTT and correlate with clinical severity.
Measured: 5 years
Bdnf polymorphisms in RTT
Characterize Bdnf polymorphisms in RTT and correlate with clinical severity.
Measured: 5 years
Inflammation markers in MECP2 duplication syndrome
Evaluate inflammation markers in MECP2 duplication syndrome and correlate with disease severity.
Measured: 5 years
Biobanking of blood for Rett syndrome (RTT), MECP2 duplication syndrome, FOXG1, CDKL5, and MECP2 mutations not producing RTT
Blood will be collected and stored from participants with RTT, MECP2 duplication, FOXG1, CDKL5, and MECP2 mutations without RTT to analyze factors noted in Outcomes 1-3 and in secondary outcome 5 to correlate with disease severity.
Measured: 5 years
Secondary outcomes (1)
Breakpoints and gene content of MECP2 and FOXG1 duplications
Characterize breakpoints and gene content of MECP2 and FOXG1 duplications and correlate with disease severity
Measured: 5 years
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted10 Mar 2016 (estimated)
- Study start1 Sep 2017
- Primary completion31 Jul 2021
- Study completion31 Jul 2021
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (62)Papers the sponsor has linked to this study.
- Other trials for Rett SyndromeStudies of the same condition, open and under way.
- More trials run by University of Alabama at BirminghamThe 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
- Cohort
- Time perspective
- Prospective
- Enrolment
- 752 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Alabama at Birmingham
- Sponsor type
- University, hospital or other
- Collaborators
- National Institutes of Health (NIH), National Center for Advancing Translational Sciences (NCATS), Office of Rare Diseases (ORD), Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), National Institute of Neurological Disorders and Stroke (NINDS)
- Responsible party
- Principal investigator, Alan Percy, University of Alabama at Birmingham
- Investigators
- Jeffrey L Neul, MD, PhD, Study chair, UCSD
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02705677
- Sponsor's protocol ID
- RDCRN # 5213
- Other IDs
- U54HD061222
- Status last verified
- Aug 2021
- First submitted
- 22 Nov 2015
- Last updated
- 5 Aug 2021
- Results posted
- No
- Data monitoring committee
- Yes
- Individual data sharing
- Yes: The data sharing agreement approved by the Rare Disease Clinical Research Network will be employed.
Publications
Hagberg B, Aicardi J, Dias K, Ramos O. A progressive syndrome of autism, dementia, ataxia, and loss of purposeful hand use in girls: Rett's syndrome: report of 35 cases. Ann Neurol. 1983 Oct;14(4):471-9. doi: 10.1002/ana.410140412.
PubMed 6638958Neul JL, Kaufmann WE, Glaze DG, Christodoulou J, Clarke AJ, Bahi-Buisson N, Leonard H, Bailey ME, Schanen NC, Zappella M, Renieri A, Huppke P, Percy AK; RettSearch Consortium. Rett syndrome: revised diagnostic criteria and nomenclature. Ann Neurol. 2010 Dec;68(6):944-50. doi: 10.1002/ana.22124.
PubMed 21154482Neul JL, Fang P, Barrish J, Lane J, Caeg EB, Smith EO, Zoghbi H, Percy A, Glaze DG. Specific mutations in methyl-CpG-binding protein 2 confer different severity in Rett syndrome. Neurology. 2008 Apr 15;70(16):1313-21. doi: 10.1212/01.wnl.0000291011.54508.aa. Epub 2008 Mar 12.
PubMed 18337588Nan X, Bird A. The biological functions of the methyl-CpG-binding protein MeCP2 and its implication in Rett syndrome. Brain Dev. 2001 Dec;23 Suppl 1:S32-7. doi: 10.1016/s0387-7604(01)00333-3.
PubMed 11738839Amir RE, Van den Veyver IB, Wan M, Tran CQ, Francke U, Zoghbi HY. Rett syndrome is caused by mutations in X-linked MECP2, encoding methyl-CpG-binding protein 2. Nat Genet. 1999 Oct;23(2):185-8. doi: 10.1038/13810.
PubMed 10508514Wan M, Lee SS, Zhang X, Houwink-Manville I, Song HR, Amir RE, Budden S, Naidu S, Pereira JL, Lo IF, Zoghbi HY, Schanen NC, Francke U. Rett syndrome and beyond: recurrent spontaneous and familial MECP2 mutations at CpG hotspots. Am J Hum Genet. 1999 Dec;65(6):1520-9. doi: 10.1086/302690.
PubMed 10577905Suter B, Treadwell-Deering D, Zoghbi HY, Glaze DG, Neul JL. Brief report: MECP2 mutations in people without Rett syndrome. J Autism Dev Disord. 2014 Mar;44(3):703-11. doi: 10.1007/s10803-013-1902-z.
PubMed 23921973Laurvick CL, de Klerk N, Bower C, Christodoulou J, Ravine D, Ellaway C, Williamson S, Leonard H. Rett syndrome in Australia: a review of the epidemiology. J Pediatr. 2006 Mar;148(3):347-52. doi: 10.1016/j.jpeds.2005.10.037.
PubMed 16615965Kerr AM, Armstrong DD, Prescott RJ, Doyle D, Kearney DL. Rett syndrome: analysis of deaths in the British survey. Eur Child Adolesc Psychiatry. 1997;6 Suppl 1:71-4.
PubMed 9452925Kirby RS, Lane JB, Childers J, Skinner SA, Annese F, Barrish JO, Glaze DG, Macleod P, Percy AK. Longevity in Rett syndrome: analysis of the North American Database. J Pediatr. 2010 Jan;156(1):135-138.e1. doi: 10.1016/j.jpeds.2009.07.015.
PubMed 19772971Guy J, Gan J, Selfridge J, Cobb S, Bird A. Reversal of neurological defects in a mouse model of Rett syndrome. Science. 2007 Feb 23;315(5815):1143-7. doi: 10.1126/science.1138389. Epub 2007 Feb 8.
PubMed 17289941Garg SK, Lioy DT, Cheval H, McGann JC, Bissonnette JM, Murtha MJ, Foust KD, Kaspar BK, Bird A, Mandel G. Systemic delivery of MeCP2 rescues behavioral and cellular deficits in female mouse models of Rett syndrome. J Neurosci. 2013 Aug 21;33(34):13612-20. doi: 10.1523/JNEUROSCI.1854-13.2013.
PubMed 23966684Chang Q, Khare G, Dani V, Nelson S, Jaenisch R. The disease progression of Mecp2 mutant mice is affected by the level of BDNF expression. Neuron. 2006 Feb 2;49(3):341-8. doi: 10.1016/j.neuron.2005.12.027.
PubMed 16446138Tropea D, Giacometti E, Wilson NR, Beard C, McCurry C, Fu DD, Flannery R, Jaenisch R, Sur M. Partial reversal of Rett Syndrome-like symptoms in MeCP2 mutant mice. Proc Natl Acad Sci U S A. 2009 Feb 10;106(6):2029-34. doi: 10.1073/pnas.0812394106.
PubMed 19208815Archer H, Evans J, Leonard H, Colvin L, Ravine D, Christodoulou J, Williamson S, Charman T, Bailey ME, Sampson J, de Klerk N, Clarke A. Correlation between clinical severity in patients with Rett syndrome with a p.R168X or p.T158M MECP2 mutation, and the direction and degree of skewing of X-chromosome inactivation. J Med Genet. 2007 Feb;44(2):148-52. doi: 10.1136/jmg.2006.045260. Epub 2006 Aug 11.
PubMed 16905679
Study at a glance
From the registry record, last updated by the sponsor on 5 Aug 2021. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Biobanking of Rett Syndrome and Related Disorders Protocol
- ClinicalTrials.gov ID
- NCT02705677
- Acronym / sponsor ID
- RDCRN # 5213
- Conditions
- Rett Syndrome, MECP2 Duplication, CDKL5, FOXG1 Disorders
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 752 participants (actual)
- Lead sponsor
- University of Alabama at BirminghamUniversity, hospital or other
- Collaborators
- National Institutes of Health (NIH), National Center for Advancing Translational Sciences (NCATS), Office of Rare Diseases (ORD), Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), National Institute of Neurological Disorders and Stroke (NINDS)
- Study start
- 1 Sep 2017 (actual)
- Primary completion
- 31 Jul 2021 (actual)
- Study completion
- 31 Jul 2021 (actual)
- First posted
- 10 Mar 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 overarching purpose of this study is to advance understanding of the natural history of Rett syndrome (RTT), MECP2-duplication disorder (MECP2 Dup), RTT-related disorders including CDKL5, FOXG1, and individuals with MECP2 mutations who do not have RTT. Although all these disorders are the result of specific genetic changes, there remains broad clinical variation that is not entirely accounted for by known biological factors. Additionally, clinical investigators currently do not have any biomarkers of disease status, clinical severity, or responsiveness to therapeutic intervention. To address these issues, biological materials (DNA, RNA, plasma, cell lines) will be collected from affected individuals and in some cases from unaffected family members, initial evaluation performed to identify additional biological factors contributing to disease severity, and these materials will be stored for future characterization.
Detailed description
At the present time, effective treatments for RTT, MECP2 Dup, or Rett-related disorders are lacking. Investigators have made substantial progress in RTT over the past eleven years such that this study represents a narrowing of focus to mutations or duplications of the MECP2 gene and related disorders, including those with phenotypic overlap. Understanding of RTT has advanced remarkably well through the Rett Syndrome Natural History Clinical Protocol (NHS) and correspondingly advancement in the basic science realm has moved forward with equivalent success. Thus, progress in clinical and basic science has led to the establishment of clinical trials and other translational studies that hold promise for additional clinical trials in future. In the process, however, investigators became aware of additional MECP2- and RTT-related disorders that were unknown at the time the original proposal was conceived and further were impressed by the substantial clinical variability in individuals with RTT that cannot be explained by differences in mutations alone. In fact, variability among individuals with identical mutations has led investigators to search for additional explanations. At the time of the initial application (2002), just three years after the identification of the gene, MECP2, as the molecular link to RTT, investigators were not aware of the variation in clinical disorders related to MECP2 mutations or to the related but quite different MECP2 Dup. Each disorder is characterized by significant neurodevelopmental features related either to alterations in the MECP2 gene or related to phenotypes closely resembling those seen in individuals with RTT. Further, the phenotypic overlap with RTT due to mutations in CDKL5 and FOXG1 was also unexplored. The investigators propose in this new study to build on the substantial progress made in understanding both classic and variant RTT and to add these related disorders, MECP2 Dup and the Rett-related disorders including CDKL5, FOXG1, and individuals with MECP2 mutations who do not have RTT. In conjunction with the longitudinal clinical assessment performed via the natural history component, investigators will systematically collect from all willing participant's blood and isolate plasma, DNA, and RNA. All participants in the Natural History Study will be asked to contribute samples at the initial visit, whereas samples will be collected repeatedly on a subset of participants in order to look for changes over time. In order to identify factors that distinguish between affected and unaffected individuals, as well as to have the potential to characterize the heritability and potential consequences of genetic changes in families, samples will be collected from unaffected family members. Additionally, on a subset of individuals chosen because of unique clinical features skin biopsies and/or hair follicles will be collected to establish cell lines. Investigators will ask all individuals providing samples to agree to potential future whole-genome sequencing in order to be able to potentially evaluate for genetic modifiers of these diseases.
These materials will be stored at a central repository (Greenwood Genetics Laboratory). The main purpose of these samples is to serve as durable materials for future analyses, however, a set of defined analyses will be performed on all samples. For the samples collected in the Rett syndrome cohort, investigators will perform X-chromosome inactivation studies and evaluate common polymorphisms in Brain derived neurotrophic factor (BDNF) and determine the contribution of these known factors to disease severity. For MECP2 Dup cohort investigators will characterize inflammatory markers in the plasma and correlate these with clinical features. Also for MECP2 Dup cohort investigators will perform detailed genomic breakpoint and gene content analysis and correlate this with disease severity. Similar analysis of genomic breakpoints and gene content will be performed on people with FOXG1 Duplications. Finally, in a pilot study, investigators will perform metabolic profiling on people from all disorders and evaluate for metabolic features correlated with disease severity, and metabolic features common or unique between these disorders. This work will provide a durable resource for future analysis, extend understanding of genotype/phenotype correlations, identify other biological factors contributing to disease severity, as well as provide the framework for the development of biomarkers of disease state and severity.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
- Number of arms
- 3
| Arm | Type | Receives |
|---|---|---|
| Rett syndrome | – | –This is a biobanking project for individuals with mutations in MECP2 or meeting diagnostic criteria for classic (typical) or variant (atypical) Rett syndrome in order to identify other genetic factors such as X-chromosome inactivation or genetic background that may explain the variations noted in these individuals, including those with the same MECP2 mutation. No interventions are anticipated. |
| MECP2 Duplication disorder | – | –This is a biobanking project for individuals with MECP2 duplications to understand the difference in the size of the duplication and the potential impact of other genes in the duplicated segment. No interventions are anticipated. |
| Rett-related disorders: CDKL5, FOXG1 | – | –This is a biobanking project for individuals with mutations in MECP2, CDKL5, and FOXG1 to understand the interplay of mutations in these individuals and the resultant phenotypic expression; for example, individuals with mutations in MECP2 but not meeting diagnostic criteria for Rett syndrome or individuals with mutations in CDKL5 or FOXG1 who may or may not meet diagnostic criteria for atypical Rett syndrome. No interventions are anticipated. |
Who may qualify
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child, Adult, Older adult
- Study population
- Females and males of all ages must have complete testing for MECP2, FOXG1, and CDKL5 genes mutations AND must meet these requirements: Gene positive for a sequence mutation, duplication or deletion in one of these 3 genes. OR Meet consensus criteria for Rett syndrome (typical or atypical)
Key inclusion criteria (1 listed)
- Individuals of both genders and of all ages, with RTT, MECP2 Dup, and, RTT-related disorders including those with mutations or deletions in CDKL5 and FOXG1 genes, or those with RTT (atypical or typical) who are mutation negative. Additionally, unaffected family members of those people who meet the disease specific criteria stated will eligible.
Key exclusion criteria (1 listed)
- Individuals who do not meet the above criteria will be excluded.
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
X-chromosome inactivation in Rett syndrome (RTT)
Time frame: 5 years
Characterize X-chromosome inactivation in RTT and correlate with clinical severity.
Bdnf polymorphisms in RTT
Time frame: 5 years
Characterize Bdnf polymorphisms in RTT and correlate with clinical severity.
Inflammation markers in MECP2 duplication syndrome
Time frame: 5 years
Evaluate inflammation markers in MECP2 duplication syndrome and correlate with disease severity.
Biobanking of blood for Rett syndrome (RTT), MECP2 duplication syndrome, FOXG1, CDKL5, and MECP2 mutations not producing RTT
Time frame: 5 years
Blood will be collected and stored from participants with RTT, MECP2 duplication, FOXG1, CDKL5, and MECP2 mutations without RTT to analyze factors noted in Outcomes 1-3 and in secondary outcome 5 to correlate with disease severity.
1 secondary outcome
Breakpoints and gene content of MECP2 and FOXG1 duplications
Time frame: 5 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 5 Aug 2021.
- Background: PubMed 6638958Hagberg B, Aicardi J, Dias K, Ramos O. A progressive syndrome of autism, dementia, ataxia, and loss of purposeful hand use in girls: Rett's syndrome: report of 35 cases. Ann Neurol. 1983 Oct;14(4):471-9. doi: 10.1002/ana.410140412.
- Background: PubMed 21154482Neul JL, Kaufmann WE, Glaze DG, Christodoulou J, Clarke AJ, Bahi-Buisson N, Leonard H, Bailey ME, Schanen NC, Zappella M, Renieri A, Huppke P, Percy AK; RettSearch Consortium. Rett syndrome: revised diagnostic criteria and nomenclature. Ann Neurol. 2010 Dec;68(6):944-50. doi: 10.1002/ana.22124.
- Background: PubMed 18337588Neul JL, Fang P, Barrish J, Lane J, Caeg EB, Smith EO, Zoghbi H, Percy A, Glaze DG. Specific mutations in methyl-CpG-binding protein 2 confer different severity in Rett syndrome. Neurology. 2008 Apr 15;70(16):1313-21. doi: 10.1212/01.wnl.0000291011.54508.aa. Epub 2008 Mar 12.
- Background: PubMed 11738839Nan X, Bird A. The biological functions of the methyl-CpG-binding protein MeCP2 and its implication in Rett syndrome. Brain Dev. 2001 Dec;23 Suppl 1:S32-7. doi: 10.1016/s0387-7604(01)00333-3.
- Background: PubMed 10508514Amir RE, Van den Veyver IB, Wan M, Tran CQ, Francke U, Zoghbi HY. Rett syndrome is caused by mutations in X-linked MECP2, encoding methyl-CpG-binding protein 2. Nat Genet. 1999 Oct;23(2):185-8. doi: 10.1038/13810.
- Background: PubMed 10577905Wan M, Lee SS, Zhang X, Houwink-Manville I, Song HR, Amir RE, Budden S, Naidu S, Pereira JL, Lo IF, Zoghbi HY, Schanen NC, Francke U. Rett syndrome and beyond: recurrent spontaneous and familial MECP2 mutations at CpG hotspots. Am J Hum Genet. 1999 Dec;65(6):1520-9. doi: 10.1086/302690.
- Background: PubMed 23921973Suter B, Treadwell-Deering D, Zoghbi HY, Glaze DG, Neul JL. Brief report: MECP2 mutations in people without Rett syndrome. J Autism Dev Disord. 2014 Mar;44(3):703-11. doi: 10.1007/s10803-013-1902-z.
- Background: PubMed 16615965Laurvick CL, de Klerk N, Bower C, Christodoulou J, Ravine D, Ellaway C, Williamson S, Leonard H. Rett syndrome in Australia: a review of the epidemiology. J Pediatr. 2006 Mar;148(3):347-52. doi: 10.1016/j.jpeds.2005.10.037.
- Background: PubMed 9452925Kerr AM, Armstrong DD, Prescott RJ, Doyle D, Kearney DL. Rett syndrome: analysis of deaths in the British survey. Eur Child Adolesc Psychiatry. 1997;6 Suppl 1:71-4.
- Background: PubMed 19772971Kirby RS, Lane JB, Childers J, Skinner SA, Annese F, Barrish JO, Glaze DG, Macleod P, Percy AK. Longevity in Rett syndrome: analysis of the North American Database. J Pediatr. 2010 Jan;156(1):135-138.e1. doi: 10.1016/j.jpeds.2009.07.015.
- Background: PubMed 17289941Guy J, Gan J, Selfridge J, Cobb S, Bird A. Reversal of neurological defects in a mouse model of Rett syndrome. Science. 2007 Feb 23;315(5815):1143-7. doi: 10.1126/science.1138389. Epub 2007 Feb 8.
- Background: PubMed 23966684Garg SK, Lioy DT, Cheval H, McGann JC, Bissonnette JM, Murtha MJ, Foust KD, Kaspar BK, Bird A, Mandel G. Systemic delivery of MeCP2 rescues behavioral and cellular deficits in female mouse models of Rett syndrome. J Neurosci. 2013 Aug 21;33(34):13612-20. doi: 10.1523/JNEUROSCI.1854-13.2013.
- International Rett Syndrome Foundation websiteLink provided by the sponsor.
- Individual participant dataSharing planned: Yes. The data sharing agreement approved by the Rare Disease Clinical Research Network will be employed.
Related trials for Rett Syndrome
RecruitingPhase 3
A Phase 3 Study of Fenfluramine Hydrochloride in Rett Syndrome
Rett Syndrome
Active, not recruiting
Measuring Impact of Computer Gaming on Arm Use in Rett Syndrome
Rett Syndrome
Active, not recruiting
Technology-supported Motor Rehabilitation for People With Rett Syndrome
Rett Syndrome
RecruitingObservational study
Neurophysiologic Biomarkers in Rett Syndrome
Rett Syndrome, RTT
RecruitingPhase 1/2
ATTUNE: A Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of Intrathecally-Administered ION440 in Participants With Methyl CpG Binding Protein 2 (MECP2) Duplication Syndrome (MDS)
Methyl CpG Binding Protein 2 (MECP2) Duplication Syndrome
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.
Jeffrey L Neul, MD, PhD study chair
UCSD
12 sites in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Rett Syndrome and MECP2 Duplication, run by University of Alabama at Birmingham at 12 sites 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 1 inclusion and 1 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 5 Aug 2021. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 12 sites 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?
X-chromosome inactivation in Rett syndrome (RTT) (time frame: 5 years). The study lists 4 primary outcomes in all. 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 NCT02705677, which also lists 62 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 5 Aug 2021.