Effects of a Cognitive Behavioral Therapy Intervention Trial to Improve Disease Outcomes in Children with Inflammatory Bowel Disease

BACKGROUND: Studies testing the efficacy of behavioral interventions to modify psychosocial sequelae of IBD in children are limited. This report presents outcomes through a six month follow up from a large RCT testing the efficacy of a cognitive-behavioral intervention for children with IBD and their parents. METHODS: 185 children age 8-17 years with a diagnosis of Crohn's (CD) or Ulcerative Colitis (UC) and their parents were randomized to one of two 3-session conditions: 1.) a social learning and cognitive-behavioral therapy condition (SLCBT) or 2.) an education support condition designed to control for time and attention. RESULTS: There was a significant overall treatment effect for school absences due to CD or UC (p<.05) at 6 months post-treatment. There was also a significant overall effect post-treatment for child-reported quality of life (p<.05), parent- reported increases in adaptive child coping (p<.001) and reductions in parents’ maladaptive responses to children's symptoms (p<.05). Finally, exploratory analyses indicated that for children with a higher level of flares (2 or more) pre-baseline, those in SLCBT experienced a greater reduction in flares post-treatment. CONCLUSIONS: This trial suggests that a brief cognitive-behavioral intervention for children with IBD and their parents can result in improved child functioning and quality of life, and for some children may decrease disease activity

\u3ci\u3eDrosophila\u3c/i\u3e Muller F Elements Maintain a Distinct Set of Genomic Properties Over 40 Million Years of Evolution

The Muller F element (4.2 Mb, ~80 protein-coding genes) is an unusual autosome of Drosophila melanogaster; it is mostly heterochromatic with a low recombination rate. To investigate how these properties impact the evolution of repeats and genes, we manually improved the sequence and annotated the genes on the D. erecta, D. mojavensis, and D. grimshawi F elements and euchromatic domains from the Muller D element. We find that F elements have greater transposon density (25–50%) than euchromatic reference regions (3–11%). Among the F elements, D. grimshawi has the lowest transposon density (particularly DINE-1: 2% vs. 11–27%). F element genes have larger coding spans, more coding exons, larger introns, and lower codon bias. Comparison of the Effective Number of Codons with the Codon Adaptation Index shows that, in contrast to the other species, codon bias in D. grimshawi F element genes can be attributed primarily to selection instead of mutational biases, suggesting that density and types of transposons affect the degree of local heterochromatin formation. F element genes have lower estimated DNA melting temperatures than D element genes, potentially facilitating transcription through heterochromatin. Most F element genes (~90%) have remained on that element, but the F element has smaller syntenic blocks than genome averages (3.4–3.6 vs. 8.4–8.8 genes per block), indicating greater rates of inversion despite lower rates of recombination. Overall, the F element has maintained characteristics that are distinct from other autosomes in the Drosophila lineage, illuminating the constraints imposed by a heterochromatic milieu