Aberrant Expression of Extracellular Signal-Regulated Kinase and 15-Hydroxyprostaglandin Dehydrogenase Indicates Radiation Resistance and Poor Prognosis for Patients with Clival Chordomas
第一作者:Zhai Yixuan, Yixuan
通讯作者:Zhang Yazhuo, Yazhuo
2018-08-01
Retrospective review was performed of 35 patients. Mean follow-up interval was 66.37 months (range, 29-106 months). Kaplan-Meier method was used for survival analysis. Immunohistochemical staining was used to detect expression levels of extracellular signal-regulated kinase (ERK) and 15-hydroxyprostaglandin dehydrogenase (HPGD).
Radical resection with protection of important structures is the most effective treatment of clival chordomas. High HPGD expression and low ERK expression were associated with radiation sensitivity and better prognosis. HPGD and ERK can be used as biomarkers to predict prognosis and guide treatment.
Total resection was achieved in 12 cases, subtotal resection was achieved in 12 cases, and partial resection was achieved in 11 cases. Radiation-sensitive group comprised 17 cases, and radiation-resistant (RR) group comprised 18 cases. Five-year progression-free survival (PFS) rates in total resection and nontotal resection groups were 46.3% and 10.1%, respectively (P = 0.005). Mean H-scores of ERK in radiation-resistant and radiation-sensitive groups were 110.38 and 82.98, respectively (P = 0.043). Mean H-scores of HPGD in radiation-resistant and radiation-sensitive groups were 178.62 and 203.47, respectively (P = 0.031). Mean PFS in low ERK expression group (58.61 months) was significantly longer than mean PFS in high ERK expression group (24.94 months) (P = 0.022). Mean PFS in high HPGD expression group (39.54 months) was significantly longer than mean PFS in low HPGD expression group (9.5 months) (P = 0.013).