alexa High serum lactate dehydrogenase level as a marker for drug resistance and short survival in multiple myeloma.
Haematology

Haematology

Journal of Hematology & Thromboembolic Diseases

Author(s): Dimopoulos MA, Barlogie B, Smith TL, Alexanian R

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Abstract OBJECTIVE: To evaluate serum lactate dehydrogenase (LDH) as a prognostic factor in previously untreated patients with multiple myeloma. DESIGN: Study of 391 consecutive patients with uniformly treated multiple myeloma, followed until death in 63\% of patients. SETTING: Tertiary, referral cancer center. PATIENTS: A total of 391 consecutive, previously untreated, symptomatic patients with various stages of multiple myeloma. INTERVENTION: Various chemotherapy regimens that included doxorubicin or glucocorticoids, or both, with a consistent response rate (53\%). MEASUREMENTS: Outcomes included clinical response based on a 75\% reduction of calculated tumor load and survival time from treatment. Univariate and multivariate analyses were used. MAIN RESULTS: Eleven percent of patients showed a high serum LDH level of more than 5.0 mukat/L (300 U/L). An elevated LDH level was seen more frequently with a rise in the tumor load; an increased level was present in 26\% of patients with high tumor mass. A high LDH level was associated with plasma cell leukemia or lymphoma-like clinical features (43\%) and with plasma cell hypodiploidy (17\%). Only 20\% of patients with elevated LDH levels responded to chemotherapy compared with a response rate of 57\% for patients with low levels of LDH. Using multivariate analysis, LDH was a significant independent predictor of response (P = 0.001), with an odds ratio of 0.25 (95\% Cl, 0.11 to 0.57). A high LDH level was associated with a short median survival (9 months) and showed the highest relative risk (2.63; Cl, 1.75 to 3.95; P = 0.001). CONCLUSIONS: Elevation of the LDH level suggests the presence of occult extraosseous disease and high tumor mass. The LDH level is a predictor of a poor prognosis in selected patients who should be considered for early intensive treatment.
This article was published in Ann Intern Med and referenced in Journal of Hematology & Thromboembolic Diseases

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