Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: KEGG:D02003 (NBT)
 1,323 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The aim of this work is to define the relationship between heat shock protein (HSP) and reactive oxygen species (ROS) in the cells exposed to different concentrations of metal ions, and to evaluate a new method for tracing the dynamic levels of cellular reactive oxygen species using a HSE-SEAP reporter gene. The expression of heat shock protein was measured using a secreted alkaline phosphatase (SEAP) reporter gene transformed into HeLa cell strain, the levels of superoxide anion (O(2)(-)) and hydrogen peroxide (H(2)O(2)) were determined by NBT reduction assay and DCFH staining flow cytometry (FCM), respectively. The experimental results demonstrated that the expression of heat shock protein induced by metal ions was linearly related to the cellular superoxide anion level before cytotoxic effects were observed, but not related to the cellular hydrogen peroxide level. The experimental results suggested that metal ions might induce heat shock protein by elevating cellular superoxide anion level, and thus the expression of heat shock protein indicated by the HSE-SEAP reporter gene can be an effective model for monitoring the dynamic level of superoxide anion and early metal-induced oxidative stress/cytotoxicity.
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PMID:Metal ions induced heat shock protein response by elevating superoxide anion level in HeLa cells transformed by HSE-SEAP reporter gene. 1659 61

The influence of a single session of moderate exercise (45 min at 55% of VO(2 )max) performed by young sedentary men (23-25 years old) on the microbicidal capacity of neutrophils was compared by using both direct (killing of phagocytosed Candida albicans) and indirect (superoxide anion production measured by NBT reduction) techniques. In addition, the role of norepinephrine and heat shock protein (Hsp) 72 in the modulation of microbicide capacity of neutrophils was evaluated during the protocol of exercise and recovery period (24 h). No significant changes were found in the superoxide production after exercise. However, immediately after exercise there was an increase in the destruction of C. albicans, which remained higher than basal values 1 day later. This behaviour was similar to the changes found in the serum extracellular Hsp72 concentrations (an increase after exercise that remained higher than basal values 24 h later). In vitro, the raised physiological concentration of Hsp72 after exercise also increased the microbicide capacity of neutrophils with respect to controls and the values induced by the basal concentration of the protein. This indicates that Hsp72 is participating as a "stress mediator" of the stimulated microbicide activity during moderate exercise. However, norepinephrine is not mediating the increased killing of C. albicans during exercise.
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PMID:Role of Hsp72 and norepinephrine in the moderate exercise-induced stimulation of neutrophils' microbicide capacity. 1689 26