Effects of hemolysis and storage condition on neuron-specific enolase (NSE) in cerebrospinal fluid and serum: implications in clinical practice
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Laurent Ramont
, Henri Thoannes , Ariel Volondat , François Chastang , Marie-Christine Millet and François-Xavier Maquart
Abstract
The concentration of neuron-specific enolase (NSE) in serum and cerebrospinal fluid (CSF) has been used as a biomarker in some cancers and, more recently, in neurodegenerative diseases. Pre-analytical conditions are very important for the quality of returned results. In this study, we evaluated the effects of storage conditions (temperature and duration of storage) and hemolysis on the concentration of NSE in serum and CSF. Our results demonstrate that samples for NSE measurement may be stored at −80°C for no more than 6 months in the case of CSF and 9months in the case of serum samples. Even invisible hemolysis may increase NSE levels in samples. Consequently, an index of hemolysis should be determined before deciding whether or not to perform NSE measurement.
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©2005 by Walter de Gruyter Berlin New York
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Articles in the same Issue
- Cervical human papillomavirus screening by PCR: advantages of targeting the E6/E7 region
- Isotretinoin therapy induces DNA oxidative damage
- Structural evaluation of plasma α2-macroglobulin in acute pancreatitis
- Failure of the PAXgene™ Blood RNA System to maintain mRNA stability in whole blood
- Reticulocyte hemoglobin measurement – comparison of two methods in the diagnosis of iron-restricted erythropoiesis
- Physical analysis of ejaculate to evaluate the secretory activity of the seminal vesicles and prostate
- Specificity of the 3H-triolein assay for pancreatic lipase in blood plasma
- Effects of hemolysis and storage condition on neuron-specific enolase (NSE) in cerebrospinal fluid and serum: implications in clinical practice
- Plasma levels of 7-hydroxymetabolites of dehydroepiandrosterone in healthy Central European aging men
- Prevalence of abnormal thyroid stimulating hormone and thyroid peroxidase antibody-positive results in a population of pregnant women in the Samara region of the Russian Federation
- Impact of standardized calibration on the inter-assay variation of 14 automated assays for the measurement of creatinine in human serum
- Efficacy of three ELISA measurements of anti-cyclic citrullinated peptide antibodies in the early diagnosis of rheumatoid arthritis
- Mean and variance quality control for multiple correlated levels of replicated control samples
- Clinical evaluation of serodiagnosis of active tuberculosis by multiple-antigen ELISA using lipids from Mycobacterium bovis BCG Tokyo 172
- Analytical evaluation of the Dade Behring Dimension RxL automated N-Terminal proBNP (NT-proBNP) method and comparison with the Roche Elecsys 2010
- Unusually high alkaline phosphatase due to intestinal isoenzyme in a healthy adult
- Deficient α-galactosidase A activity in plasma but no Fabry disease – a pitfall in diagnosis
- Reportable interval of patient examination results and ISO 15189