Clinical Report: Impairment of the Glymphatic System in Acute Ischemic Stroke
Overview
This study investigates the glymphatic system's impairment in acute ischemic stroke (AIS) using diffusion tensor imaging analysis along the perivascular space (DTI-ALPS). Findings indicate significant reductions in glymphatic function correlated with upper limb motor deficits, suggesting a potential biomarker for assessing motor function in AIS patients.
Background
The glymphatic system is crucial for cerebral waste clearance and maintaining brain homeostasis. Impairments in this system can exacerbate neurological deficits following acute ischemic stroke. Understanding the relationship between glymphatic function and clinical outcomes may enhance therapeutic strategies and patient management in stroke care.
Data Highlights
Group
Left Hemisphere DTI-ALPS Index
Right Hemisphere DTI-ALPS Index
Healthy Controls
Higher
Lower
Left Infarction
Reduced
No Significant Difference
Right Infarction
Reduced
No Significant Difference
Key Findings
The left hemisphere DTI-ALPS index was significantly higher in healthy controls compared to the right hemisphere (P < 0.0001).
Both left- and right-sided infarction groups showed significantly reduced left hemisphere DTI-ALPS indices compared to healthy controls (P < 0.05).
In the left infarction group, the left hemisphere DTI-ALPS index negatively correlated with NIHSS scores (r = −0.418, P = 0.017).
In the right infarction group, the left hemisphere DTI-ALPS index positively correlated with FMA-UE scores (r = 0.513, P = 0.003).
These findings suggest a left-dominant pattern of glymphatic impairment in acute ischemic stroke.
Clinical Implications
The left hemisphere DTI-ALPS index may serve as a valuable, lateralization-independent biomarker for assessing upper limb motor function in acute ischemic stroke patients. Clinicians should consider incorporating DTI-ALPS evaluations in routine assessments to better understand glymphatic function and its impact on recovery.
Conclusion
This study highlights the significant impairment of the glymphatic system in acute ischemic stroke, particularly in the left hemisphere, and its correlation with motor function. Further research may solidify the role of DTI-ALPS as a clinical tool in stroke management.
