Abstract
The goal of this study was to examine NOX2 and NOX4 expression in clinical samples of patients with traumatic brain injury (TBI), and to explore the correlation of NOX2 and NOX4 expression with the severity of injury, duration of injury, and prognosis. Brain samples of 20 TBI patients within 1 cm of the contusion site were collected and grouped based on duration of injury, Glasgow Coma Scale (GCS) and Glasgow Outcome Scale (GOS), and immunofluorescence staining were performed to examine the expression levels of NOX2 and NOX4 in the neurons and astrocytes. We found that the expression level of NOX2 in neurons and positive rate of NOX2 expression in astrocytes peaked at 12–24 and 6–12 h after injury, respectively. The expression level of NOX4 in neurons peaked at 24–48 h, and the positive rate of NOX4 expression gradually increased with prolonged injury. We also found that the higher the GCS score, the lower the expression levels of NOX2 and NOX4 in neurons was, while higher the GCS score, the lower the positive rate of NOX4 expression in astrocytes was and the higher the GOS grade, the lower the positive rate of expression in astrocytes was. In conclusion, NOX2 and NOX4 expressions significantly increase at an early stage after TBI, and abnormal expressions of NOX2 and NOX4 are correlated to patient prognosis to certain extent.
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Abbreviations
- TBI:
-
Traumatic brain injury
- NADPH:
-
Nicotinamide adenine dinucleotide phosphate
- NOX:
-
Non-phagocytic cell oxidase
- ROS:
-
Reactive oxygen species
- OS:
-
Oxidative stress
- NOX1:
-
Non-phagocytic cell oxidase1
- NOX2:
-
Non-phagocytic cell oxidase2
- NOX3:
-
Non-phagocytic cell oxidase3
- NOX4:
-
Non-phagocytic cell oxidase4
- NOX5:
-
Non-phagocytic cell oxidase5
- DUOX1:
-
Dual-function oxidase1
- DUOX2:
-
Dual-function oxidase2
- GCS:
-
Glasgow coma scale
- GOS:
-
Glasgow outcome scale
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Acknowledgments
This work was supported by grants from the National Natural Science Foundation of China (No. 81171105, 81271300, and 81371279), Jiangsu Province’s Outstanding Medical Academic Leader program (No. LJ201139), the National Key Technology R&D program for the 12th Five-year plan of the People’s Republic of China (2011BAI08B05, 2011BAI08B06, and 2014BAZ04810), and grants from Scientific Department of Jiangsu Province (No. BL2014045) and Suzhou Government (No. LCZX201301, SZS201413 and SYS201332).
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Z. Li, F. Tian and Z. Shao equally contributed to this work.
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Li, Z., Tian, F., Shao, Z. et al. Expression and clinical significance of non-phagocytic cell oxidase 2 and 4 after human traumatic brain injury. Neurol Sci 36, 61–71 (2015). https://doi.org/10.1007/s10072-014-1909-z
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DOI: https://doi.org/10.1007/s10072-014-1909-z