RT Journal Article SR Electronic T1 RNA Methylation—A Possible Genetic Marker in Cystic Fibrosis JF Pediatrics JO Pediatrics FD American Academy of Pediatrics SP 485 OP 487 VO 50 IS 3 A1 Rennert, Owen M. A1 Julius, Richard L. A1 LaPointe, David YR 1972 UL http://pediatrics.aappublications.org/content/50/3/485.abstract AB Cystic fibrosis (CF) of the pancreas was initially thought to be an inborn error of metabolism affecting only exocrine tissue. In 1969, the demonstration by Danes and Bearn1 of metachromasia in cultivated fibroblasts obtained from patients with CF gave experimental support to the hypothesis that all CF cells reflect the basic biochemical defect. After this initial report several investigators observed that tissue cultured cells from some patients with CF and heterozygotes accumulated increased quantities of acid mucopolysaccharides and glycogen. No basic defect in these cell culture systems has been identified. No definitive test for the detection of the heterozygote state is available. See table in the PDF file