11 September 2018 : Laboratory Research
The Expression of Actin-Related Protein 2/3 Complex Subunit 5 (ARPC5) Expression in Multiple Myeloma and its Prognostic SignificanceTao Xiong1ACEF, Zeyu Luo2ABCDE*
Med Sci Monit 2018; 24: LBR6340-6348
BACKGROUND: The aim of this study was to analyze the prognostic value of ARPC5 in patients with multiple myeloma (MM).
MATERIAL AND METHODS: MM gene expression studies GSE6477, GSE31162, GSE24080, and GSE19784 were obtained and analyzed. The expression of ARPC5 was assessed in normal plasma cells, baseline MM cells, and relapsed MM cells. Univariate and multivariable analyses were used to determine the relationship between ARPC5 expression and clinical characteristics and survivals of MM patients. Quantitative PCR was used to detect the expression ARPC5 in bone marrow mononuclear cells of MM patients and normal controls. GSEA was conducted to identify associated mechanisms.
RESULTS: ARPC5 expression was significantly increased in baseline MM cells compared to normal plasma cells (P=0.0414). Meanwhile, ARPC5 was significantly increased in relapsed MM cells compared to baseline MM cells (P<0.0001). ARPC5 expression was significantly associated with β2-microglobin (P=0.047), serum lactate dehydrogenase (P=0.007), and rates of aspirate plasma cells (P=0.007). Meanwhile, patients in the ARPC5 high expression group were associated with poor overall survival (P=0.0027) and event-free survival (P=0.0102) compared to those in the ARPC5 low expression group. Multivariable analysis indicated that ARPC5 was an independent prognostic factor for MM patients. Quantitative PCR demonstrated that ARPC5 was significantly increased in MM patients. GSEA results indicated that ARPC5 might affect cellular growth of myeloma cells through mammalian target of rapamycin (mTOR)C1 signaling pathway.
CONCLUSIONS: ARPC5 could be treated as an independent biomarker for patients with MM.
Keywords: Actin-Related Protein 2-3 Complex, Multiple Myeloma, Prognosis
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