INTRODUCTION: Multiple myeloma (MM) is still incurable due to resistance against various therapies. Thus, the identification of biomarkers predicting progression is urgently needed. Here, we evaluated four biomarkers in bone marrow and peripheral blood of MM patients for their prognostic significance. MATERIALS & METHODS: Bone marrow- and peripheral blood plasma levels of FLT3-L, soluble TIE2, endostatin, and osteoactivin were determined in patients with monoclonal gammopathy of undetermined significance (MGUS, n = 14/n = 4), patients with newly diagnosed MM (NDMM, n = 42/n = 31) and patients with relapsed/refractory MM (RRMM, n = 27/n = 16) by sandwich ELISA. RESULTS: Median FLT3-L expression increased from MGUS (58.77 pg/ml in bone marrow; 80.40 pg/ml in peripheral blood) to NDMM (63.15 pg/ml in bone marrow; 85.05 pg/ml in peripheral blood) and was maximal in RRMM (122 pg/ml in bone marrow; 160.47 pg/ml in peripheral blood; NDMM vs. RRMM p<0.001). A cut-off value of FLT3-L >92 pg/ml in bone marrow and >121 pg/ml in peripheral blood was associated with relapse or refractoriness in MM patients. FLT3-L was found to be a high predictive marker for discrimination between NDMM and RRMM as well in bone marrow as in peripheral blood (AUC 0.75 in bone marrow; vs 0.84 in peripheral blood). CONCLUSION: High levels of FLT3-L in bone marrow and peripheral blood of MM patients identify patients with progressive disease and are associated with relapse or refractoriness in MM patients. FLT3-L could be useful as a marker to identify RRMM patients and should be evaluated as target for future therapies.

• MeSH
• diferenciální diagnóza MeSH
• dospělí MeSH
• ELISA MeSH
• endostatiny metabolismus   MeSH
• kostní dřeň metabolismus   MeSH
• lidé středního věku MeSH
• lidé MeSH
• membránové glykoproteiny metabolismus   MeSH
• membránové proteiny metabolismus   MeSH
• mnohočetný myelom metabolismus   MeSH
• nádorové biomarkery metabolismus   MeSH
• prognóza MeSH
• receptor TIE-2 metabolismus   MeSH
• recidiva MeSH
• ROC křivka MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• Názvy látek
• endostatiny MeSH
• flt3 ligand protein MeSH Prohlížeč
• GPNMB protein, human MeSH Prohlížeč
• membránové glykoproteiny MeSH
• membránové proteiny MeSH
• nádorové biomarkery MeSH
• receptor TIE-2 MeSH