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[Expression of microtubule associated protein-2 mRNA after cerebral contusion]
Xin-hua Liang1, Jie Fu, Jun-hong Sun
1Department of Forensic Pathology, School of Forensic Medicine, Shanxi Medical University, Taiyuan 030001, China. liangxhlemon@163.com
Objective:
To explore the mRNA expression of microtubule associated protein-2 (MAP-2) after cerebral contusion, and to investigate its relationship with post-injury interval in a rat model of cerebral contusion.
Methods:
Based on Feeney's model of cerebral contusion, the time-dependent changes of MAP-2 mRNA were detected by real-time PCR method in different groups.
Results:
MAP-2 mRNA showed a lower expression in the brain of the control group. The expression of MAP-2 mRNA decreased 1 h post-injury, and reached the lowest level at 6 h, and the expression of MAP-2 mRNA gradually increased in the focus of the cerebral contusion from 12h to 14d after contusion, which kept a high level up to 14 d post-injury.
Conclusion:
The time-dependent changes of MAP-2 mRNA expression may be a new method for estimating the wound age of cerebral contusion in forensic practice.
Insights
Microtubule associated protein-2 (MAP-2) mRNA expression changes over time after brain injury. These dynamic changes in MAP-2 mRNA levels may help estimate the age of cerebral contusions in forensic investigations.
Area of Science:
- Neuroscience
- Molecular Biology
- Forensic Science
Background:
- Cerebral contusion, a type of traumatic brain injury, presents challenges in determining the post-injury interval.
- Microtubule associated protein-2 (MAP-2) is a crucial neuronal protein involved in microtubule stability.
Purpose of the Study:
- To investigate the temporal expression patterns of MAP-2 mRNA following experimental cerebral contusion in a rat model.
- To assess the correlation between MAP-2 mRNA levels and the post-injury time frame.
Main Methods:
- Utilized Feeney's model to induce cerebral contusion in rats.
- Employed real-time polymerase chain reaction (PCR) to quantify MAP-2 mRNA expression at various time points post-injury.
Main Results:
- MAP-2 mRNA expression was lower in control brains compared to injured ones.
- Expression decreased significantly within 1 hour, reaching a nadir at 6 hours post-contusion.
- MAP-2 mRNA levels gradually increased from 12 hours to 14 days, maintaining elevated levels up to 14 days post-injury.
Conclusions:
- The dynamic changes in MAP-2 mRNA expression following cerebral contusion exhibit a time-dependent profile.
- These findings suggest that MAP-2 mRNA expression patterns could serve as a novel biomarker for estimating the age of cerebral contusions in forensic contexts.
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