Therapeutic Potential of Lumbrokinase in Acute Ischemic Stroke: A Meta-Analysis of Efficacy and Safety.

Background: Acute ischemic stroke (AIS) requires rapid treatment. Although alteplase is a standard thrombolytic therapy, its limited availability in low-resource settings presents a challenge. Lumbrokinase, a fibrinolytic enzyme isolated from earthworms, has been proposed as an adjunct treatment option. This meta-analysis evaluated efficacy and safety in addition to supportive care.

Methods: A systematic review of randomized controlled trials (RCTs) was conducted using multiple databases through July 2024 following PRISMA guidelines. The risk of bias was assessed using RoB 2.0, and evidence quality was graded using GRADE. Publication bias was evaluated using funnel plots. Meta-analyses employed a random-effects model and reported odds ratios (ORs) and mean differences (MDs) with 95% confidence intervals. Primary outcomes included the Barthel Index and NIHSS scores, and secondary outcomes included adverse events and laboratory results.

Results: A total of 35 RCTs published between 2010 and 2024 were included. Compared with supportive care alone, lumbrokinase adjunct therapy significantly improved Barthel Index scores (MD = 15.17; 95% CI: 14.60 to 15.74) and reduced NIHSS scores (MD = -2.01; 95% CI: -2.06 to -1.97). Safety analyses revealed no significant increase in adverse events including gastrointestinal discomfort (OR = 1.00; 95% CI: 0.32 to 3.16) and GI bleeding (OR = 1.42; 95% CI: 0.55 to 3.67). Laboratory assessments indicated improvements in aPTT (MD = 1.93; 95% CI: 1.58 to 2.28), platelet aggregation rate (MD = -205.86; 95% CI, -206.77 to -204.96), and D-dimer levels (MD = -0.04; 95% CI: -0.05 to -0.03).

Conclusion: Lumbrokinase may safely improve stroke outcomes; however, limited evidence warrants cautious use and further high-quality trials.