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Title: Differential cellular zinc levels in metastatic and primary nasopharyngeal carcinoma
Authors: Bay, B.-H. 
Chan, Y.-G.
Fong, C.-M.
Leong, H.-K.
Keywords: Cellular zinc content
Metastatic NPC
Primary NPC
X-ray microanalysis
Issue Date: 1997
Citation: Bay, B.-H.,Chan, Y.-G.,Fong, C.-M.,Leong, H.-K. (1997). Differential cellular zinc levels in metastatic and primary nasopharyngeal carcinoma. International Journal of Oncology 11 (4) : 745-748. ScholarBank@NUS Repository.
Abstract: Zinc levels are known to be elevated in certain cancer tissues. In this study, zinc content in metastatic and primary nasopharyngeal carcinoma (NPC) cells were quantitated by X-ray microanalysis at the ultrastructural level. Zinc levels of cancer cells derived from the cervical lymph node of a patient with metastatic carcinoma and that from the nasopharynx biopsy of another NPC patient with no clinical evidence of secondary spread, were analyzed. X-ray micro-analysis revealed significantly higher cellular zinc levels in metastatic NPC cells. Zinc is a known anti-apoptotic agent and tumor response to radiotherapy is linked with apoptosis or programmed cell death. Raised zinc levels observed here could provide the biological basis for the observation of a higher percentage of distant metastasis in cervical node positive NPC patients treated by radiotherapy (the mainstay of treatment for NPC) as compared to those without regional nodal disease.
Source Title: International Journal of Oncology
ISSN: 10196439
Appears in Collections:Staff Publications

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