Reference intervals for growth arrest-specific 6 protein in adults.
The objective of this study was to establish reference intervals for growth arrest-specific 6 (GAS6), a vitamin K-dependent protein, in human adult plasma according to the Guideline of Clinical and Laboratory Standards Institute (CLSI) C28-A3. Blood samples were collected from 308 healthy volunteers aged 18-72 (157 female, 151 male). A non-parametric approach was used to calculate the reference interval. The plasma GAS6 reference interval was determined, with 90% confidence interval: the lower limit (2.5 percentile) was 2.5 (1.9-3.1) μg/L and the upper limit (97.5 percentile) = 18.8 (18.0-22.3) μg/L. Harris-Boyd's test did not suggest partitioning by age or gender: medians for males [7.8 (5.8-10.7) μg/L] and females [9.9 (7.1-13.5) μg/L]. Three age-subgroups were tested: 18-29 years (n = 168); 30-44 years (n = 73); 45-72 years (n = 67). The intra- and inter-assay variations were 12.6% (mean, 5.2 ± 0.7 μg/L) and 14.0% (mean, 9.2 ± 1.3 μg/L), respectively. The mean recovery was 104%. This study reports plasma GAS6 reference intervals established first according to the guideline of CLSI C28-A3.
a Marmara University School of Pharmacy , Department of Biochemistry , Istanbul , Turkey.
Zeynep
Z
Cagman
a Marmara University School of Pharmacy , Department of Biochemistry , Istanbul , Turkey.
Ozlem
O
Bingol Ozakpinar
b Department of Biochemistry , Bakirkoy Dr. Sadi Konuk Training and Research Hospital , Istanbul , Turkey.
Zeynep
Z
Cirakli
b Department of Biochemistry , Bakirkoy Dr. Sadi Konuk Training and Research Hospital , Istanbul , Turkey.
Asuman
A
Gedikbasi
c Marmara University School of Medicine, Department of Public Health , Istanbul , Turkey.
Pinar
P
Ay
d Clinical Biochemistry, Department of Paediatric Laboratory Medicine , The Hospital for Sick Children, University of Toronto , Toronto , ON , Canada.
David
D
Colantonio
e Department of Biochemistry , Haydarpasa Numune Training and Research Hospital , Istanbul , Turkey.
Ahmet Riza
AR
Uras
d Clinical Biochemistry, Department of Paediatric Laboratory Medicine , The Hospital for Sick Children, University of Toronto , Toronto , ON , Canada.
Khosrow
K
Adeli
a Marmara University School of Pharmacy , Department of Biochemistry , Istanbul , Turkey.
Fikriye
F
Uras
D000293:Adolescent; D000328:Adult; D000368:Aged; D000704:Analysis of Variance; D005260:Female; D064368:Healthy Volunteers; D006801:Humans; D036341:Intercellular Signaling Peptides and Proteins / Q000097:blood*; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D017410:Practice Guidelines as Topic; D012016:Reference Values; D015203:Reproducibility of Results; D000099255:Growth Arrest-Specific Protein 6
D036341:Intercellular Signaling Peptides and Proteins; D000099255:Growth Arrest-Specific Protein 6
Biochemical marker; GAS6; Vitamin K; clinical and laboratory standards ınstitute; enzyme-linked ımmunosorbent assay; international federation of clinical chemistry; reference ranges