[IL-6, p53 and proto-oncogene c-myc play different roles as biological markers of plasma cell dyscrasias].

PURPOSE

To determine the role of serum levels of IL-6 and p53 mutant protein as well as of c-myc proto-oncogene alterations: a) in discriminating between benign (MGUS) and malignant Plasma cell dyscrasias (Multiple and Microsecreting Myeloma, Plasmocytoma); b) in monitoring the clinical course of malignant forms of this disease.

PATIENTS AND METHODS

Eighty-eight patients affected by Plasma cell dyscrasias (58 MGUS, 24 MM and 6 PLC) entered this study. Using commercially available ELISA kits, serum levels of IL-6 and p53 have been determined in all the patients. In addition, a selected group of patients (n = 30) was also analyzed for structural c-myc gene alterations by Southern blot technique.

RESULTS

The results show that, conversely from p53 protein, IL-6 and c-myc gene may represent useful diagnostic markers for discriminating benign from malignant forms of Plasma cell dyscrasia. On the contrary, preliminary findings of the same work indicate a potential role for the mutant p53 protein in monitoring the response to chemotherapy of patients affected by MM or PLM.

CONCLUSIONS

Overall, these data suggest that the combined use of IL-6, p53 and c-myc may provide a new approach for a more rational management of Plasma cell dyscrasia patients.