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Japanese Journal of Cancer Research : Gann logoLink to Japanese Journal of Cancer Research : Gann
. 2001 May;92(5):576–581. doi: 10.1111/j.1349-7006.2001.tb01132.x

Poor Prognosis in Nasopharyngeal Cancer Patients with Low Glucose‐6‐phosphate‐dehydrogenase Activity

Ann‐Joy Cheng 1, Daniel Tsun‐Yee Chiu 1, Lai‐Chu See 2, Chun‐Ta Liao 3, I‐How Chen 3, Joseph Tung‐Chieh Chang 4,✉
PMCID: PMC5926748  PMID: 11376568

Abstract

Nasopharyngeal carcinoma (NPC) is endemic among well‐defined ethnic groups in several world regions, such as Southeastern China and Taiwan. Glucose‐6‐phosphate‐dehydrogenase (G6PD)‐deficiency, a sex‐linked disorder, is one of the most common enzymopathies in Taiwan. The major role of G6PD is to generate NADPH to protect cells from oxidative damage, which is a major contributing factor to certain degenerative diseases, such as aging and cancer. In view of the coincidence of epidemic distribution of NPC and G6PD deficiency, as well as the house‐keeping function of G6PD in cellular oxidative defense, we investigated the correlation of G6PD activity with NPC. The stage of NPC was classified by AJCC (1997) criteria. G6PD levels were determined in 108 NPC male patients and 75 healthy male individuals. The mean G6PD level of NPC patients was 218.9 U/1012RBC or 7.53 U/g hemoglobin (Hb), being much lower than in normal individuals (260.6 U/1012erythrocytes (RBC) or 8.92 U/gHb). The level of G6PD activity had no correlation with tumor stage or lymph node or distant metastasis, but was significantly correlated with tumor recurrence (P=0.004 when using G6PD=130 U/1012 RBC as cutoff value). These results indicated that low G6PD activity in patients with NPC is associated with poor prognosis.

Keywords: Nasopharyngeal cancer, G6PD, Oxidative defense, Epstein‐Barr virus

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These two authors made equal contributions to the work.

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