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Improvement effects of tanshinone on the impaired cognition and motor function in MCAO mice with ischemic penumbra
1Neurosurgery Department, Affiliated Hospital of Inner Mongolia University for the Nationalities, Tongliao, China.
Abstract:
This study aims to investigate the effects of tanshinone on improving the impaired cognition and motor function in MCAO model mice with ischemic penumbra. MWM test was carried out to evaluate the spatial learning and memory performance and the cognitive function of mice. The area of cerebral infarction was analyzed by immunohistochemistry. The TUNEL apoptosis detection kit was used to detect neuronal apoptosis. On the 25th day, the induction model group had lower body weight than the control group and the tanshinone treatment group; the induction model group had decreased walking deficiency and correct area escape times than the other two groups; while, tanshinone treatment group had higher movement distance, movement speed, periphery entry frequency, grooming rate, decreased center entry frequency, infarction area, apoptotic neuron number, latent escape time than induction model group; additionally, the control group had increased periphery and corner entry frequency, but decreased center entry frequency and latent escape time than the other two groups. Tanshinone can reduce neuronal damage in the ischemic penumbra after stroke, improve the integrity of white and gray matter, and restore connectivity in motor and cognitive functions, thereby supporting recovery from ischemic stroke.
Insights
Tanshinone improves cognitive and motor functions in stroke model mice by reducing neuronal damage and enhancing brain connectivity. This natural compound supports recovery after ischemic stroke.
Area of Science:
- Neuroscience
- Pharmacology
- Stroke Research
Background:
- Ischemic stroke, often caused by middle cerebral artery occlusion (MCAO), leads to significant cognitive and motor deficits.
- The ischemic penumbra, a region surrounding the infarct core, is a critical target for therapeutic intervention to mitigate damage and promote recovery.
Purpose of the Study:
- To investigate the therapeutic potential of tanshinone in improving cognitive and motor impairments in a mouse model of ischemic stroke.
- To evaluate the neuroprotective effects of tanshinone on neuronal damage and apoptosis in the ischemic penumbra.
Main Methods:
- Middle cerebral artery occlusion (MCAO) model in mice to induce ischemic stroke.
- Morris Water Maze (MWM) test to assess spatial learning and memory.
- Immunohistochemistry to quantify cerebral infarction area.
- TUNEL assay to detect and quantify neuronal apoptosis.
Main Results:
- Tanshinone treatment significantly improved spatial learning and memory, as evidenced by increased correct area escape times and reduced latent escape time compared to the MCAO model group.
- Tanshinone administration reduced the cerebral infarction area and the number of apoptotic neurons in the ischemic penumbra.
- Mice treated with tanshinone exhibited enhanced motor function, indicated by increased movement distance, speed, and grooming rate, along with decreased center entry frequency.
Conclusions:
- Tanshinone demonstrates significant neuroprotective effects, reducing neuronal damage and apoptosis in the ischemic penumbra following stroke.
- Tanshinone treatment improves both cognitive and motor functions, likely by enhancing white and gray matter integrity and restoring neural connectivity.
- These findings suggest that tanshinone holds promise as a therapeutic agent for supporting recovery from ischemic stroke.
