Background/aim: Serum γ-glutamyltransferase (GGT) is reportedly associated with survival and therapeutic response in various malignancies; however, as far as we are aware its impact on metastatic castration-resistant prostate cancer (mCRPC) has never been assessed.
Patients and methods: Fifty consecutive men with mCRPC receiving enzalutamide at a single cancer center were retrospectively evaluated. The primary endpoint was overall survival (OS) and the secondary endpoints were prostate-specific antigen (PSA) response, maximal PSA change, and PSA progression-free survival (PSA-PFS).
Results: Multivariable analysis demonstrated that elevation of GGT (≥40 U/l) was significantly and independently associated with shorter OS (hazard ratio(HR)=3.61; p=0.004), as were lower hemoglobin (HR=6.04; p<0.001) and higher PSA (HR=4.38; p=0.009). Elevated GGT was also associated with poorer PSA response, maximal PSA change, and shorter PSA-PFS.
Conclusion: Elevated GGT was an adverse prognostic indicator in men with mCRPC receiving enzalutamide. External validations would improve the generality of our findings.
Keywords: prognosis; prostatic neoplasms; serologic tests; γ-Glutamyltransferase.
Copyright© 2019, International Institute of Anticancer Research (Dr. George J. Delinasios), All rights reserved.