Developmental profiles of infants with an FMR1 premutation

Details

• Alternative Title:
  J Neurodev Disord
• Personal Author:
  Wheeler, Anne C. ; Sideris, John ; Hagerman, Randi ; Berry-Kravis, Elizabeth ; Tassone, Flora ; Bailey, Donald B.
• Description:
  Background
  
  Emerging evidence suggests that a subset of FMR1 premutation carriers is at an increased risk for cognitive, emotional, and medical conditions. However, because the premutation is rarely diagnosed at birth, the early developmental trajectories of children with a premutation are not known.
  
  Methods
  
  This exploratory study examined the cognitive, communication, and social-behavioral profiles of 26 infants with a premutation who were identified through participation in a newborn screening for fragile X syndrome pilot study. In this study, families whose newborn screened positive for an FMR1 premutation were invited to participate in a longitudinal study of early development. Twenty-six infants with the premutation and 21 matched, screen-negative comparison babies were assessed using validated standardized measures at 6-month intervals starting as young as 3 months of age. The babies were assessed up to seven times over a 4-year period.
  
  Results
  
  The premutation group was not statistically different from the comparison group on measures of cognitive development, adaptive behavior, temperament, or overall communication. However, the babies with the premutation had a significantly different developmental trajectory on measures of nonverbal communication and hyperresponsivity to sensory experiences. They also were significantly more hyporesponsive at all ages than the comparison group. Cytosine-guanine-guanine repeat length was linearly associated with overall cognitive development.
  
  Conclusions
  
  These results suggest that infants with a premutation may present with subtle developmental differences as young as 12 months of age that may be early markers of later anxiety, social deficits, or other challenges thought to be experienced by a subset of carriers.
  
  
• Subjects:
  Early Development FMR1 Premutation Newborn Screening Research
• Source:
  J Neurodev Disord. 8.
• Pubmed ID:
  27822316
• Pubmed Central ID:
  PMC5095966
• Document Type:
  Journal Article
• Funding:
  P30 HD002274/HD/NICHD NIH HHS/United States ; R01 HD036071/HD/NICHD NIH HHS/United States ; U50 DD000596/DD/NCBDD CDC HHS/United States
• Volume:
  8
• Collection(s):
  CDC Public Access
• Main Document Checksum:
  urn:sha256:366b61e7c3fb683009f0366fa3a181f4e5589bc951c62ef25a583b7ff218be65
• Download URL:
  https://stacks.cdc.gov/view/cdc/43063/cdc_43063_DS1.pdf
• File Type:
  [PDF - 486.60 KB ]