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Plasma selenium levels in patients with advanced upper gastrointestinal cancer
Author(s) -
Pothier Lillian,
Lane Warren W.,
Bhargava Arvind,
Michielson Conrad,
Douglass Harold O.
Publication year - 1987
Publication title -
cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.052
H-Index - 304
eISSN - 1097-0142
pISSN - 0008-543X
DOI - 10.1002/1097-0142(19871101)60:9<2251::aid-cncr2820600925>3.0.co;2-t
Subject(s) - medicine , selenium , gastrointestinal cancer , sepsis , gastroenterology , cancer , selenium deficiency , confounding , enteral administration , parenteral nutrition , surgery , oxidative stress , colorectal cancer , materials science , catalase , glutathione peroxidase , metallurgy
Plasma selenium levels were determined at various intervals during hospitalization of 71 patients with upper gastrointestinal and other malignancies. These patients often require frequent nutritional as well as surgical or medical intervention. Attempts were made to identify, evaluate, and compensate for numerous confounding variables at each of the 374 plasma selenium determinations. Selenium levels in stable patients who were neither receiving aggressive antineoplastic therapy, nor septic, nor taking corticosteroids and who had no clinically significant metabolic imbalance were then separately analyzed. In 55 stable patients selenium levels were 28% lower than those found in 20 normal controls (mean 61.8 μg/L, P < 0.0005). An analysis of all the readings showed that selenium levels were substantially decreased by recent radiotherapy or sepsis, by regional tumor spread and increased tumor burden, and by intravenous and/or enteral hyperalimentation and intravenous lipids. In contrast to these findings, levels were relatively higher in patients with an adequate oral diet or with a lesser tumor burden. The comparison between selenium levels in stable and in aggressively treated or septic patients supports the importance of the relationship of nutrition to selenium levels in cancer patients.