Serum Levels of Interleukin-8 and Soluble Interleukin-6 Receptor in Patients with Stage-I Multiple Myeloma: A Case-Control Study
2020
OBJECTIVE: Multiple myeloma (MM) remains an incurable disease that needs better recognition and further research. Previous studies elucidated the interaction between myeloma cells and showed the necessity of bone marrow stromal cells for the initiation and progression of MM. Many chemokines and their receptors including interleukin-8 (IL-8) and soluble interleukin-6 receptor (sIL-6R) play important roles in this interaction. The main purpose of this study is evaluating the serum level of IL-8 and sIL-6R on stage-I of MM patients and healthy controls. METHODS: Serum samples from 30 stage-I MM patients (13 males and 17 females) and 30 healthy subjects as controls (13 males and 17 females) were examined in this study. The protein concentrations of serum IL-8 and sIL-6R were assessed by enzyme-linked immunosorbent assay (ELISA). RESULTS: The mean level of IL-8 and sIL-6R were significantly elevated in stage-I MM. The mean levels of IL-8 were 1246.57+/-279.22 ng/ml in stage-I MM and 902.53+/- 294.61 ng/ml in controls (P<0.001). The mean levels of sIL-6R were 5.39+/-1.38 ng/ml and 4.1+/-1.14 ng/ml in stage-I MM and controls, respectively (P<0.001). The mean levels of IL-8 were 1342.18+/-193.4 ng/ml in patient females and 859+/- 278.2ng/ml in control females (P <0.001). The mean levels of sIL-6R were 5.21+/-1.55 ng/ml and 3.91+/-1.22 ng/ml in patient females and control females, respectively (P=0.01). The mean level of sIL-6R in patient males and control males were 5.63+/-1.43 ng/ml and 4.34+/-1.04 ng/ml, respectively (P=0.01). A significant correlation (Pearson's correlation = 0.45, P=0.008) was observed in the population of females (patients and controls). CONCLUSION: The results of study suggest the possible involvement of IL-8 and the sIL-6R at stage-I MM and can better characterize the role of chemokines and their receptors in the disease process, especially in the early stages.
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