Soluble mesothelin-related peptides (SMRP) - high stability of a potential tumor marker for mesothelioma.
SMRP (soluble mesothelin-related peptides) is a promising marker for detection of malignant mesotheliomas (MM) in serum that has not yet been validated in appropriate epidemiological studies. Field studies might not always provide optimal conditions for storage and transport of samples, and follow-up studies have to rely on sample integrity. Proper validation of the marker would require sufficient stability of the antigen and robustness of the assay. SMRP concentrations were evaluated in serum samples of 98 healthy donors, using the MESOMARK ELISA kit. The SMRP distribution in the healthy study population was determined and biological and pre-analytical variations were examined regarding their influence on SMRP concentrations. For diagnostic decisions a best statistical and unbiased cut-off between 1.5 and 1.6 nmol/L was determined (95th percentile). No age- or gender-specific differences could be observed. SMRP exhibits excellent stability regarding short-term storage, long-term storage, and repeated freeze/thaw cycles. Scientific studies as well as real life applications that employ SMRP would not be limited by sample stability issues.
BG Institute for Occupational Medicine (BGFA), Ruhr University of Bochum, Bochum, Germany.
Daniel G
DG
Weber
Dirk
D
Taeger
Beate
B
Pesch
Thomas
T
Kraus
Thomas
T
Brüning
Georg
G
Johnen
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000097:blood*; D004797:Enzyme-Linked Immunosorbent Assay / Q000379:methods; D005260:Female; D058851:GPI-Linked Proteins; D006801:Humans; D008175:Lung Neoplasms / Q000097:blood / Q000175:diagnosis; D008297:Male; D008562:Membrane Glycoproteins / Q000097:blood*; D000090204:Mesothelin; D008654:Mesothelioma / Q000097:blood* / Q000175:diagnosis; D008875:Middle Aged; D010446:Peptide Fragments / Q000097:blood
D014408:Biomarkers, Tumor; D058851:GPI-Linked Proteins; D008562:Membrane Glycoproteins; D010446:Peptide Fragments; D000090204:Mesothelin