Clinical Chemistry and Laboratory Medicine

Effect of long-term frozen storage on stability of kappa free light chain indexMartin Schmidaueron May 28, 2025 at 10:00 am

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Clin Chem Lab Med. 2025 May 8. doi: 10.1515/cclm-2025-0125. Online ahead of print. ABSTRACT OBJECTIVES: To investigate whether frozen storage duration influences κ-FLC index. METHODS: CSF and serum samples of patients with multiple sclerosis collected for routine diagnostic purposes had been stored at -20 °C. κ-FLC and albumin concentrations were measured at two different timepoints, … Read more

An isotope dilution-liquid chromatography-tandem mass spectrometry-based candidate reference measurement procedure for the quantification of 17β-estradiol in human serum and plasmaMyriam Otton May 28, 2025 at 10:00 am

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Clin Chem Lab Med. 2025 May 26. doi: 10.1515/cclm-2024-1255. Online ahead of print. ABSTRACT OBJECTIVES: A new candidate isotope dilution-liquid chromatography-tandem mass spectrometry (ID-LC-MS/MS)-based reference measurement procedure (RMP) has been developed for the accurate and precise quantification of 17β-estradiol (E2) in human serum and plasma covering a measurement range from 0.400 to 5,000 pg/mL (1.47-18,357 … Read more

Candidate reference measurement procedure based on isotope dilution-two dimensional-liquid chromatography-tandem mass spectrometry for the quantification of androstenedione in human serum and plasmaMyriam Otton May 27, 2025 at 10:00 am

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Clin Chem Lab Med. 2025 May 23. doi: 10.1515/cclm-2024-1135. Online ahead of print. ABSTRACT OBJECTIVES: Androstenedione (ASD) is a biomarker used in the diagnosis of hyperandrogenism and adrenal hyperplasia. Therefore, accurate measurement of serum ASD is pivotal in clinical settings. We aimed to develop a novel highly selective reference measurement procedure (RMP) based on isotope … Read more

Histamine metabolite to basal serum tryptase ratios in systemic mastocytosis and hereditary alpha tryptasemia using a validated LC-MS/MS approachAbdulrazzaq Alherakyon May 27, 2025 at 10:00 am

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Clin Chem Lab Med. 2025 May 22. doi: 10.1515/cclm-2025-0189. Online ahead of print. ABSTRACT OBJECTIVES: Histamine, mainly produced in mast cells (MC), plays a key role in allergy and inflammation. Measuring its urinary metabolites, N-methylhistamine (NMH) and 1-methyl-4-imidazoleacetic acid (MIMA), is essential in assessing histamine-related pathologies. Patients with concurrent systemic mastocytosis (SM) and hereditary alpha … Read more

A cost-effective assessment for the combination of indirect immunofluorescence and solid-phase assay in ANA-screeningNicoletta Galloon May 26, 2025 at 10:00 am

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Clin Chem Lab Med. 2025 May 22. doi: 10.1515/cclm-2025-0170. Online ahead of print. ABSTRACT OBJECTIVES: Anti-nuclear antibodies (ANA) testing on indirect immunofluorescence (IIF) has been for a long time the gold standard assay in the diagnosis of rheumatic diseases; more recently different solid phase assays (SPA) have been recommended to increase specificity of positive results. … Read more

Vitamin D metabolome in preterm infants: insights into postnatal metabolismTomas Matejekon May 26, 2025 at 10:00 am

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Clin Chem Lab Med. 2025 May 22. doi: 10.1515/cclm-2025-0311. Online ahead of print. ABSTRACT OBJECTIVES: To describe the structure of vitamin D metabolome and investigate the possible cause of high serum levels of C3 epimers of 25-(OH)D in preterm infants, we compared the vitamin D metabolites in umbilical cord blood with serum samples taken at … Read more

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