Delayed intervention in experimental stroke with TRC051384--a small molecule HSP70 inducer

Area of Science:

• Neuroscience
• Pharmacology
• Biochemistry

Background:

• Heat shock proteins (HSPs) protect cells from various stresses, including ischemia.
• TRC051384 is a novel compound that potently induces heat shock protein 70 (HSP70).

Purpose of the Study:

• To evaluate the neuroprotective effects of TRC051384 in a rat model of transient cerebral ischemia.
• To determine the efficacy of delayed TRC051384 treatment (4 and 8 hours post-ischemia) on neuronal injury, brain edema, and neurological deficits.

Main Methods:

• Focal cerebral ischemia was induced in rats by middle cerebral artery (MCA) occlusion.
• Rats received intraperitoneal injections of TRC051384 or vehicle every 2 hours for 48 hours, starting 4 or 8 hours after ischemia onset.
• Infarct progression, brain edema, neurological disability, and survival were assessed using magnetic resonance imaging and behavioral tests up to 7 days.

Main Results:

• TRC051384 treatment significantly reduced neuronal injury by 87% and brain edema by 25%, even when initiated 8 hours post-ischemia.
• Delayed treatment with TRC051384 led to significant improvements in survival rates (50% by day 2, 67.3% by day 7) when initiated 4 hours post-ischemia.
• TRC051384 induced HSP70 via HSF1 activation, enhancing chaperone and anti-inflammatory activities.

Conclusions:

• TRC051384 demonstrates significant neuroprotective effects in a rat model of ischemic stroke, even with delayed administration.
• The compound effectively reduces infarct size, brain edema, and neurological deficits, improving survival rates.
• TRC051384 holds potential as a novel therapeutic agent for treating ischemic stroke.