ABCC7 p.Ala309Asp
[switch to full view]Comments [show]
None has been submitted yet.
PMID: 12014388
[PubMed]
Padoan R et al: "Negative sweat test in hypertrypsinaemic infants with cystic fibrosis carrying rare CFTR mutations."
No.
Sentence
Comment
8
Molecular analysis identified the following genotypes: F508del/A309D, F508del/3849+ 10kbCfiT, F508del/R117H (in two patients), R117H/ L997F, and F508del/R117L.
X
ABCC7 p.Ala309Asp 12014388:8:63
status: NEW35 A subsequent expanded analysis of the CFTR gene, by means of DGGE analysis and sequencing, was performed on the remaining three chromosomes and identified the following CFTR alterations: R117L, L997F, and A309D.
X
ABCC7 p.Ala309Asp 12014388:35:205
status: NEW42 Table 1 Diagnostic features of patients Patient number Sex First IRT (ng/ml) (cut-off) Second IRT (ng/ml) (cut-off) Sweat test chloride (mmol/l) Age at sweat test Age at re-evaluation Symptoms Repeat sweat test chloride (mmol/l) Genotype 1 M 47 (40) 39 (30) 43 4 months 3 years and 3 months Chronic respiratory 64 DF508/A309D 2 M 174 (55) 112 (40) <60 4 months 6 years and 6 months Severe nasal polyposis 68 DF508/3849+ 10kbCfiT 3 F 56 (55) 64 (40) 34 4 months 5 years and 4 months Recurrent upper airways infections 55 DF508/R117H-7T 4 F 84 (80) 102 (40) 55 4 months 4 years No symptoms Not determined R117H-5T/L997F 5 F 142 (80) 81 (40) 37 3 months 20 months Recurrent upper airways infections 47 DF508/R117H-7T 6 F 90 (80) 55 (40) 36 2 months 18 months No symptoms 49 DF508/R117L Discussion Our retrospective evaluation of patients diagnosed beyond 1 year of age at our centre over a ca. 6-year period shows that hypertrypsinaemic newborns carrying at least one ''mild`` CFTR mutation may have a chloride sweat test below 60 mmol/l and a delayed CF diagnosis.
X
ABCC7 p.Ala309Asp 12014388:42:320
status: NEW43 Rare mutations in the CFTR gene were identified in six patients showing increased b-IRT on newborn screening and a normal sweat test: R117H (three cases), R117L, A309D, L997F and the intronic alteration 3849+10kbCfiT.
X
ABCC7 p.Ala309Asp 12014388:43:162
status: NEW44 In the whole CF population followed at the Milan CF Centre (580 patients), R117L, A309D and L997F have never been identified before, whereas R117H and 3849+10kbCfiT account for only 0.51% and 0.68% of alleles, respectively.
X
ABCC7 p.Ala309Asp 12014388:44:82
status: NEW