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Bromodomain-containing protein 2 (O27.1.1) (Really interesting new gene 3 protein) [KIAA9001] [RING3]


Brd2 haploinsufficiency extends lifespan and healthspan in C57B6/J mice.

Aging in mammals is the gradual decline of an organism's physical, mental, and physiological capacity. Aging leads to increased risk for disease and eventually to death. Here, we show that Brd2 haploinsufficiency (Brd2 /-) extends lifespan and increases healthspan in C57B6/J mice. In Brd2 /- mice, longevity is increased by 23% (p<0.0001), and, relative to wildtype animals (Brd2 / ), cancer incidence is reduced by 43% (p<0.001). In addition, relative to age-matched wildtype mice, Brd2 heterozygotes show healthier aging including: improved grooming, extended period of fertility, and lack of age-related decline in kidney function and morphology. Our data support a role for haploinsufficiency of Brd2 in promoting healthy aging. We hypothesize that Brd2 affects aging by protecting against the accumulation of molecular and cellular damage. Given the recent advances in the development of BET inhibitors, our research provides impetus to test drugs that target BRD2 as a way to understand and treat/prevent age-related diseases.

MeSH Terms

  • Animals
  • Female
  • Fertility
  • Grooming
  • Haploinsufficiency
  • Kidney
  • Longevity
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Transcription Factors

Genetic architecture differences between pediatric and adult-onset inflammatory bowel diseases in the Polish population.

Most inflammatory bowel diseases (IBDs) are classic complex disorders represented by common alleles. Here we aimed to define the genetic architecture of pediatric and adult-onset IBDs for the Polish population. A total of 1495 patients were recruited, including 761 patients with Crohn's disease (CD; 424 pediatric), 734 patients with ulcerative colitis (UC; 390 pediatric), and 934 healthy controls. Allelotyping employed a pooled-DNA genome-wide association study (GWAS) and was validated by individual genotyping. Whole exome sequencing (WES) was performed on 44 IBD patients diagnosed before 6 years of age, 45 patients diagnosed after 40 years of age, and 18 healthy controls. Altogether, out of 88 selected SNPs, 31 SNPs were replicated for association with IBD. A novel BRD2 (rs1049526) association reached significance of P = 5.2 × 10 and odds ratio (OR) = 2.43. Twenty SNPs were shared between pediatric and adult patients; 1 and 7 were unique to adult-onset and pediatric-onset IBD, respectively. WES identified numerous rare and potentially deleterious variants in IBD-associated or innate immunity-associated genes. Deleterious alleles in both groups were over-represented among rare variants in affected children. Our GWAS revealed differences in the polygenic architecture of pediatric- and adult-onset IBD. A significant accumulation of rare and deleterious variants in affected children suggests a contribution by yet unexplained genetic components.

MeSH Terms

  • Adolescent
  • Adult
  • Aging
  • Child
  • Child, Preschool
  • Female
  • Genome-Wide Association Study
  • Genotype
  • Humans
  • Inflammatory Bowel Diseases
  • Male
  • Poland
  • Polymorphism, Single Nucleotide