Abstract

Fragile X syndrome (FXS) is the most common known inherited cause of mental retardation, but it can also manifest as a broad spectrum of behavior and learning problems in individuals with an IQ in the normal range. This genotype-phenotype study assesses in detail neurocognitive abilities, emotional status, and physical features in individuals with the premutation and in individuals with the full mutation. This information is correlated with molecular measures, including the overall CGG repeat number of the FMR1 gene, the degree of methylation, the messenger RNA levels, and the FMR1 protein (FMRP) levels. In addition, in females the activation ratio (AR) which measures the percentage of cells that have the normal FMR1 gene on the active X chromosome is also assessed. This study is carried out at two centers: Denver, Colorado and Melbourne, Australia. In Australia, the expertise of Drs. Danuta Loesch and Richard Huggins include a quantitative pedigree assessment that will give us insight to how background genetic effects modify the fragile X phenotype. We are particularly interested in whether clinical involvement truly exists in individuals with the premutation.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
General Clinical Research Centers Program (M01)
Project #
5M01RR000069-38
Application #
6305032
Study Section
Project Start
1999-12-01
Project End
2001-02-28
Budget Start
1998-10-01
Budget End
1999-09-30
Support Year
38
Fiscal Year
2000
Total Cost
$19,860
Indirect Cost

  Institution

Name
University of Colorado Denver
Department
Type
DUNS #
065391526
City
Aurora
State
CO
Country
United States
Zip Code
80045

  Publications

Young, Kendra A; Maturu, Amita; Lorenzo, Carlos et al. (2018) The triglyceride to high-density lipoprotein cholesterol (TG/HDL-C) ratio as a predictor of insulin resistance, ?-cell function, and diabetes in Hispanics and African Americans. J Diabetes Complications :
Kelsey, Megan M; Braffett, Barbara H; Geffner, Mitchell E et al. (2018) Menstrual Dysfunction in Girls From the Treatment Options for Type 2 Diabetes in Adolescents and Youth (TODAY) Study. J Clin Endocrinol Metab 103:2309-2318
Kleinberger, Jeffrey W; Copeland, Kenneth C; Gandica, Rachelle G et al. (2018) Monogenic diabetes in overweight and obese youth diagnosed with type 2 diabetes: the TODAY clinical trial. Genet Med 20:583-590
Berkowitz, Robert I; Marcus, Marsha D; Anderson, Barbara J et al. (2018) Adherence to a lifestyle program for youth with type 2 diabetes and its association with treatment outcome in the TODAY clinical trial. Pediatr Diabetes 19:191-198
Arslanian, Silva; El Ghormli, Laure; Kim, Joon Young et al. (2018) The Shape of the Glucose Response Curve During an Oral Glucose Tolerance Test: Forerunner of Heightened Glycemic Failure Rates and Accelerated Decline in ?-Cell Function in TODAY. Diabetes Care :
Kriska, Andrea; El Ghormli, Laure; Copeland, Kenneth C et al. (2018) Impact of lifestyle behavior change on glycemic control in youth with type 2 diabetes. Pediatr Diabetes 19:36-44
Venditti, E M; Tan, K; Chang, N et al. (2018) Barriers and strategies for oral medication adherence among children and adolescents with Type 2 diabetes. Diabetes Res Clin Pract 139:24-31
Gidding, Samuel S; Bacha, Fida; Bjornstad, Petter et al. (2018) Cardiac Biomarkers in Youth with Type 2 Diabetes Mellitus: Results from the TODAY Study. J Pediatr 192:86-92.e5
Jacobson, Denise L; Lindsey, Jane C; Coull, Brent A et al. (2018) The Association of Fat and Lean Tissue With Whole Body and Spine Bone Mineral Density Is Modified by HIV Status and Sex in Children and Youth. Pediatr Infect Dis J 37:71-77
Levenson, Amy E; Wadwa, R Paul; Shah, Amy S et al. (2017) PCSK9 Is Increased in Youth With Type 1 Diabetes. Diabetes Care 40:e85-e87

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