Necrotizing enterocolitis in two siblings and an unrelated infant with overlapping chromosome 6q25 deletions

Hannah C.D. Esdal, Muhammad B. Ghbeis, Daniel A. Saltzman, Donavon Hess, Janet R. Hume, Robyn C. Reed, Susan A. Berry, Eric Hoggard, Betsy Hirsch, Linda B. Baughn, Lisa A. Schimmenti

Research output: Contribution to journalArticle

Abstract

The pathogenesis of necrotizing enterocolitis (NEC) remains poorly understood but is thought to be multifactorial. There are no specific recurring chromosomal abnormalities previously associated with NEC. We report 3 cases of intestinal necrosis associated with large chromosome 6 deletions. The first patient was found to have a 7.9-Mb deletion of chromosome 6 encompassing over 40 genes, arr[GRCh37] 6q25.3q26(155699183-163554531)×1. The second patient had a 19.5-Mb deletion of chromosome 6 generated by an unbalanced translocation with chromosome 18, 46,XY,der(6)t (6;18)(q25.1;p11.23), arr[GRCh37] 6q25.1q27(151639526-171115067)×1, 18p11.32p11.23(131700-7694199)×3, which included the whole 7.9-Mb region deleted in the first patient. The third patient was the younger sibling of the second patient with an identical derivative chromosome 6. The shared abnormal chromosome 6 region includes multiple genes of interest, particularly EZR. Mouse models have demonstrated that Ezr is expressed in microvillar epithelium and helps regulate cell-cell adhesion in the gut. We hypothesize that deletion of this shared region of 6q leads to gastrointestinal vulnerability which may predispose patients to intestinal necrosis.

Original languageEnglish (US)
Pages (from-to)141-148
Number of pages8
JournalMolecular Syndromology
Volume9
Issue number3
DOIs
StatePublished - May 1 2018

Keywords

  • Chromosome 6q deletion
  • EZR
  • Necrotizing enterocolitis

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

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    Esdal, H. C. D., Ghbeis, M. B., Saltzman, D. A., Hess, D., Hume, J. R., Reed, R. C., Berry, S. A., Hoggard, E., Hirsch, B., Baughn, L. B., & Schimmenti, L. A. (2018). Necrotizing enterocolitis in two siblings and an unrelated infant with overlapping chromosome 6q25 deletions. Molecular Syndromology, 9(3), 141-148. https://doi.org/10.1159/000488817