Document Detail

IDS iSYS automated intact procollagen-1-N-terminus pro-peptide assay: method evaluation and reference intervals in adults and children.
MedLine Citation:
PMID:  24072575     Owner:  NLM     Status:  In-Data-Review    
Abstract Background: We carried out a technical evaluation of the Immunodiagnostic Systems (IDS) automated intact procollagen-I N-terminus propeptide (PINP) assay on the iSYS platform, and established reference intervals for PINP in both adults and children. Methods: Assay imprecision, recovery and interference were studied. Serum and plasma values were compared, and PINP stability was assessed. Using 828 specimens, IDS iSYS intact PINP and Roche E170 total PINP values were compared. Specimens from 597 adults and 485 children and adolescents were used to establish reference intervals for intact PINP. Results: The method demonstrated good recovery and acceptable imprecision. The assay was unaffected by icterus and lipaemia, but haemolysis decreased measured PINP. Serum and plasma values were comparable. There was a non-linear relation between IDS intact and Roche total PINP values. Pre- and post-menopausal women had comparable PINP values, but there was a difference between women of different age groups. Serum PINP in men showed a decline in young age up to 45 years, but remained steady thereafter. Separate reference intervals were established for four age groups in women and for two age groups in men. Data for children were partitioned into four-year age groups, and these showed PINP to be high with no major gender differences until 12 years of age. Thereafter, values in females decreased in 13-16 years age groups and further in 17-20 years age groups, whereas PINP increased in boys of 13-16 years of age with a subsequent decline at 17-20 years. Conclusions: The IDS iSYS PINP intact assay appears to be reliable. We have established gender- and age-related reference intervals for children and adults based on a relatively large healthy North European population.
Alireza Morovat; Anthony Catchpole; Angélique Meurisse; Agnès Carlisi; Anne-Catherine Bekaert; Olivier Rousselle; Maria Paddon; Timothy James; Etienne Cavalier
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Clinical chemistry and laboratory medicine : CCLM / FESCC     Volume:  51     ISSN:  1434-6621     ISO Abbreviation:  Clin. Chem. Lab. Med.     Publication Date:  2013 Oct 
Date Detail:
Created Date:  2013-09-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9806306     Medline TA:  Clin Chem Lab Med     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  2009-18     Citation Subset:  IM    
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