Inducing stroke in aged, hypertensive, diabetic rats.

Area of Science:

• Neuroscience
• Cardiovascular Research
• Metabolic Disorders

Background:

• Current animal models for ischemic stroke often do not reflect the complex health conditions of human patients.
• Comorbidities like diabetes and hypertension are prevalent in stroke patients but underrepresented in preclinical research.
• Developing models that incorporate these common conditions is crucial for translational research.

Purpose of the Study:

• To establish a feasible method for inducing ischemic stroke in aged spontaneously hypertensive rats (SHRs) with coexisting diabetes.
• To assess the viability of using these comorbid animal models for stroke research.
• To enhance the clinical translatability of findings from laboratory-based stroke studies.

Main Methods:

• Middle cerebral artery occlusion (MCAO) using a filament for 2 hours in aged (56-week-old) spontaneously hypertensive rats (SHRs).
• Induction of both acute (2 weeks) and chronic (36 weeks) diabetes using a modified streptozotocin regimen.
• Careful adjustment of the streptozotocin dosing to ensure survival of aged SHRs post-diabetes induction.

Main Results:

• Successful induction of ischemic stroke via MCAO in aged SHRs with both acute and chronic diabetes.
• High survival rates of the comorbid rats after stroke induction, with minimal mortality.
• Demonstrated feasibility of creating a stroke model that incorporates multiple common human comorbidities.

Conclusions:

• Inducing ischemic stroke in aged rats with concurrent diabetes and hypertension is achievable.
• This comorbid animal model offers a more clinically relevant platform for studying stroke.
• Incorporating such models can bridge the gap between preclinical research and clinical application in stroke treatment.