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2018 ; 3
(8
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Whole-exome sequencing uncovers oxidoreductases DHTKD1 and OGDHL as linkers
between mitochondrial dysfunction and eosinophilic esophagitis
#MMPMID29669943
Sherrill JD
; Kc K
; Wang X
; Wen T
; Chamberlin A
; Stucke EM
; Collins MH
; Abonia JP
; Peng Y
; Wu Q
; Putnam PE
; Dexheimer PJ
; Aronow BJ
; Kottyan LC
; Kaufman KM
; Harley JB
; Huang T
; Rothenberg ME
JCI Insight
2018[Apr]; 3
(8
): ä PMID29669943
show ga
Eosinophilic esophagitis (EoE) is an allergic inflammatory esophageal disorder
with a complex underlying genetic etiology often associated with other
comorbidities. Using whole-exome sequencing (WES) of 63 patients with EoE and 60
unaffected family members and family-based trio analysis, we sought to uncover
rare coding variants. WES analysis identified 5 rare, damaging variants in
dehydrogenase E1 and transketolase domain-containing 1 (DHTKD1). Rare variant
burden analysis revealed an overabundance of putative, potentially damaging
DHTKD1 mutations in EoE (P = 0.01). Interestingly, we also identified 7 variants
in the DHTKD1 homolog oxoglutarate dehydrogenase-like (OGDHL). Using
shRNA-transduced esophageal epithelial cells and/or patient fibroblasts, we
further showed that disruption of normal DHTKD1 or OGDHL expression blunts
mitochondrial function. Finally, we demonstrated that the loss of DHTKD1
expression increased ROS production and induced the expression of viperin, a gene
previously shown to be involved in production of Th2 cytokines in T cells.
Viperin had increased expression in esophageal biopsies of EoE patients compared
with control individuals and was upregulated by IL-13 in esophageal epithelial
cells. These data identify a series of rare genetic variants implicating DHTKD1
and OGDHL in the genetic etiology of EoE and underscore a potential pathogenic
role for mitochondrial dysfunction in EoE.