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2017 ; 5
(6
): 720-729
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Mutations in fetal genes involved in innate immunity and host defense against
microbes increase risk of preterm premature rupture of membranes (PPROM)
#MMPMID29178652
Modi BP
; Teves ME
; Pearson LN
; Parikh HI
; Haymond-Thornburg H
; Tucker JL
; Chaemsaithong P
; Gomez-Lopez N
; York TP
; Romero R
; Strauss JF 3rd
Mol Genet Genomic Med
2017[Nov]; 5
(6
): 720-729
PMID29178652
show ga
BACKGROUND: Twin studies have revealed a significant contribution of the fetal
genome to risk of preterm birth. Preterm premature rupture of membranes (PPROM)
is the leading identifiable cause of preterm delivery. Infection and inflammation
of the fetal membranes is commonly found associated with PPROM. METHODS: We
carried out whole exome sequencing (WES) of genomic DNA from neonates born of
African-American mothers whose pregnancies were complicated by PPROM (76) or were
normal term pregnancies (N = 43) to identify mutations in 35 candidate genes
involved in innate immunity and host defenses against microbes. Targeted
genotyping of mutations in the candidates discovered by WES was conducted on an
additional 188 PPROM cases and 175 controls. RESULTS: We identified rare
heterozygous nonsense and frameshift mutations in several of the candidate genes,
including CARD6, CARD8, DEFB1, FUT2, MBL2, NLP10, NLRP12, and NOD2. We discovered
that some mutations (CARD6, DEFB1, FUT2, MBL2, NLRP10, NOD2) were present only in
PPROM cases. CONCLUSIONS: We conclude that rare damaging mutations in innate
immunity and host defense genes, the majority being heterozygous, are more
frequent in neonates born of pregnancies complicated by PPROM. These findings
suggest that the risk of preterm birth in African-Americans may be conferred by
mutations in multiple genes encoding proteins involved in dampening the innate
immune response or protecting the host against microbial infection and microbial
products.