Immunoreactive trypsinogen levels in newborn screened infants with an inconclusive diagnosis of cystic fibrosis

Autor: Chee Y. Ooi, Rosie Sutherland, Carlo Castellani, Katherine Keenan, Margaret Boland, Joe Reisman, Candice Bjornson, Mark A. Chilvers, Richard van Wylick, Steven Kent, April Price, Dimas Mateos-Corral, Daniel Hughes, Melinda Solomon, Peter Zuberbuhler, Janna Brusky, Peter R. Durie, Felix Ratjen, Tanja Gonska
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: BMC Pediatrics, Vol 19, Iss 1, Pp 1-7 (2019)
Druh dokumentu: article
ISSN: 1471-2431
DOI: 10.1186/s12887-019-1756-4
Popis: Abstract Background Newborn screening (NBS) for cystic fibrosis (CF) not only identifies infants with a diagnosis of CF, but also those with an uncertain diagnosis of cystic fibrosis (CF), i.e. CF transmembrane conductance regulator (CFTR)-related metabolic syndrome (CRMS) or CF screen positive inconclusive diagnosis (CFSPID). These infants have an uncertain long-term outcome and it is currently unclear around time of diagnosis, which infants are at higher risk of later fulfilling a CF diagnosis. In this study, we hypothesised that immunoreactive trypsinogen (IRT) levels, used in NBS as a marker of pancreatic disease and function, may reflect the degree of CFTR dysfunction in each individual and therefore would help to identify those with CRMS/CSPID who are later at risk for meeting the criteria of CF. Methods In this longitudinal, prospective study, infants with CRMS/CFSPID and CF were recruited and followed in 9 CF clinics (Canada and Italy). We compared NBS IRT levels between CF and CRMS/CFSPID, and between children with CRMS/CFSPID→CF and CRMS/CFSPID→CRMS/CFSPID during the period of June 2007 to April 2016. Results Ninety eight CRMS/CFSPID and 120 CF subjects were enrolled. During the study period, 14 (14.3%) CRMS/CFSPID subjects fulfilled the diagnostic criteria for CF (CRMS/CFSPID→CF), while the diagnosis remained uncertain (CRMS/CFSPID→ CRMS/CFSPID) in 84 (85.7%) subjects. Significantly higher NBS IRT concentrations (ng/ml) were present in CF than CRMS/CFPSID (median (interquartile range): 143.8 (99.8–206.2) vs. 75.0 (61.0–105.9); P
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