Revised prognostic staging system for light chain amyloidosis incorporating cardiac biomarkers and serum free light chain measurements
| Autor: | Morie A. Gertz, Nelson Leung, Steve R. Zeldenrust, S. Vincent Rajkumar, Shaji Kumar, Philip R. Greipp, Colin L. Colby, David Dingli, Martha Q. Lacy, Stephen J. Russell, Suzanne R. Hayman, Kristina Laumann, Angela Dispenzieri, Robert A. Kyle, Francis K. Buadi, John A. Lust |
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| Rok vydání: | 2012 |
| Předmět: |
Adult
Male Cancer Research medicine.medical_specialty Pathology medicine.drug_class Plasma cell Gastroenterology Immunoglobulin Light-chain Amyloidosis Troponin T Internal medicine Natriuretic Peptide Brain Original Reports medicine AL amyloidosis Natriuretic peptide Humans Survival rate Aged Aged 80 and over business.industry Beta-2 microglobulin Amyloidosis Middle Aged medicine.disease Prognosis Peptide Fragments Transplantation Survival Rate medicine.anatomical_structure Oncology Female Immunoglobulin Light Chains business Biomarkers |
| Zdroj: | Journal of clinical oncology : official journal of the American Society of Clinical Oncology. 30(9) |
| ISSN: | 1527-7755 |
| Popis: | Purpose Cardiac involvement predicts poor prognosis in light chain (AL) amyloidosis, and the current prognostic classification is based on cardiac biomarkers troponin-T (cTnT) and N-terminal pro–B-type natriuretic peptide (NT-ProBNP). However, long-term outcome is dependent on the underlying plasma cell clone, and incorporation of clonal characteristics may allow for better risk stratification. Patients and Methods We developed a prognostic model based on 810 patients with newly diagnosed AL amyloidosis, which was further examined in two other datasets: 303 patients undergoing stem-cell transplantation, and 103 patients enrolled onto different clinical trials. Results We examined the prognostic value of plasma cell–related characteristics (ie, difference between involved and uninvolved light chain [FLC-diff], marrow plasma cell percentage, circulating plasma cells, plasma cell labeling index, and β2 microglobulin). In a multivariate model that included these characteristics as well as cTnT and NT-ProBNP, only FLC-diff, cTnT, and NT-ProBNP were independently prognostic for overall survival (OS). Patients were assigned a score of 1 for each of FLC-diff ≥ 18 mg/dL, cTnT ≥ 0.025 ng/mL, and NT-ProBNP ≥ 1,800 pg/mL, creating stages I to IV with scores of 0 to 3 points, respectively. The proportions of patients with stages I, II, III and IV disease were 189 (25%), 206 (27%), 186 (25%) and 177 (23%), and their median OS from diagnosis was 94.1, 40.3, 14, and 5.8 months, respectively (P < .001). This classification system was validated in the other datasets. Conclusion Incorporation of serum FLC-diff into the current staging system improves risk stratification for patients with AL amyloidosis and will help develop risk-adapted therapies for AL amyloidosis. |
| Databáze: | OpenAIRE |
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