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International Congress on Neuroimmunology and Therapeutics

San Francisco, USA

Hua Su

Hua Su

University of California, USA

Title: Impact of Bone Fracture on Stroke Recovery

Biography

Biography: Hua Su

Abstract

Stroke is the leading cause of disability in adults and an important risk factor for bone fracture. Alternatively, stroke is one of the most devastating complications of bone fracture. In the United States, approximately 70,000 stroke victims suffer from bone fracture within the first year after their stroke. Reported date showed that about 0.2% to 4.1% patients suffer from stroke after hip surgery. However, the impact of bone fracture on stroke recovery has not been fully studies. We have studied the influence of bone fracture shortly before or after ischemic stroke on stroke recovery in a mouse model. We found that bone fracture increases alarmins and pro-inflammatory cytokines in the blood and increase stroke related injury as well as functional deficits through augmenting the neuroinflammatory response. Mice with stroke and bone fracture have more severe functional deficits, larger infarct sizes, and more CD68+ macrophages in the peri-infarct region than mice that have stroke only. Bone fracture also increases oxidative stress in the injury and promotes pro-inflammatory polarization (M1) of macrophage. Anti-inflammatory therapies reduce the negative impact of bone fracture on stroke recovery. In a clinical study, we found hip fracture patients with advance age are prone to have ischemic stroke and higher CHADS2 score and neutrophil counts are risk factors for post-fracture ischemic stroke. Prior bone fracture history is an independent risk factor for ischemic stroke. These findings could help doctors identifying fracture patients that at risk of post-fracture stroke and providing preventive therapies to these patients before surgical fixation.

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