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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Hum+Mol+Genet
2017 ; 26
(4
): 829-842
Nephropedia Template TP
gab.com Text
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Imputation of orofacial clefting data identifies novel risk loci and sheds light
on the genetic background of cleft lip ± cleft palate and cleft palate only
#MMPMID28087736
Ludwig KU
; Böhmer AC
; Bowes J
; Nikolic M
; Ishorst N
; Wyatt N
; Hammond NL
; Gölz L
; Thieme F
; Barth S
; Schuenke H
; Klamt J
; Spielmann M
; Aldhorae K
; Rojas-Martinez A
; Nöthen MM
; Rada-Iglesias A
; Dixon MJ
; Knapp M
; Mangold E
Hum Mol Genet
2017[Feb]; 26
(4
): 829-842
PMID28087736
show ga
Nonsyndromic cleft lip with or without cleft palate (nsCL/P) is among the most
common human birth defects with multifactorial etiology. Here, we present results
from a genome-wide imputation study of nsCL/P in which, after adding replication
cohort data, four novel risk loci for nsCL/P are identified (at chromosomal
regions 2p21, 14q22, 15q24 and 19p13). On a systematic level, we show that the
association signals within this high-density dataset are enriched in
functionally-relevant genomic regions that are active in both human neural crest
cells (hNCC) and mouse embryonic craniofacial tissue. This enrichment is also
detectable in hNCC regions primed for later activity. Using GCTA analyses, we
suggest that 30% of the estimated variance in risk for nsCL/P in the European
population can be attributed to common variants, with 25.5% contributed to by the
24 risk loci known to date. For each of these, we identify credible SNPs using a
Bayesian refinement approach, with two loci harbouring only one probable causal
variant. Finally, we demonstrate that there is no polygenic component of nsCL/P
detectable that is shared with nonsyndromic cleft palate only (nsCPO). Our data
suggest that, while common variants are strongly contributing to risk for nsCL/P,
they do not seem to be involved in nsCPO which might be more often caused by rare
deleterious variants. Our study generates novel insights into both nsCL/P and
nsCPO etiology and provides a systematic framework for research into craniofacial
development and malformation.