Clinical Study to Evaluate the Efficacy of Febuxostat in the Treatment of Conservatively Managed Intracranial Hemorrhage Patients

Intracranial hemorrhage (ICH) is a severe neurological condition characterized by bleeding within the intracranial vault, including the brain parenchyma and surrounding meningeal spaces .

It is associated with high mortality and significant morbidity, often leading to severe neurological dysfunctions . ICH can be classified into various subtypes based on the anatomical location of bleeding, including intraparenchymal hemorrhage (IPH), subarachnoid hemorrhage (SAH), subdural hematoma (SDH), epidural hematoma (EDH), and intraventricular hemorrhage (IVH) .

The pathophysiology of ICH involves both primary and secondary brain injuries. Primary brain injury results from direct mechanical damage caused by the hematoma, while secondary brain injury (SBI) is driven by oxidative stress, neuroinflammation, and disruption of the blood-brain barrier (BBB). Oxidative stress, in particular, plays a significant role in ICH progression, as the overproduction of reactive oxygen species (ROS) leads to cellular apoptosis, lipid peroxidation, and neuronal damage. Inflammatory responses further exacerbate brain injury, contributing to cognitive dysfunction and neurodegeneration .

Uric acid (UA), the end product of purine metabolism, is catalyzed by xanthine oxidase (XO) and has been implicated in cerebrovascular diseases due to its pro-oxidant properties. Hyperuricemia is associated with an increased risk of coronary heart disease, ischemic stroke, diabetes, hypertension, chronic kidney disease, and gout. Moreover, elevated UA levels may worsen ICH prognosis, leading to higher mortality and more severe symptoms.

Xanthine oxidase plays a crucial role in ROS production during the conversion of hypoxanthine to xanthine and UA, generating hydrogen peroxide (H₂O₂) and superoxide anion (O₂-), both of which contribute to oxidative stress and vascular damage. These oxidative molecules increase microvascular permeability and can further propagate secondary brain injury in ICH .

A powerful non-purine selective xanthine oxidase inhibitor (XOI), Febuxostat was approved by the FDA in 2009 for the treatment hyperuricemia in gout patients. According to recent research, Feb has neuroprotective effects on cerebral ischemia-reperfusion in rats and is beneficial against cardiac ischemia-reperfusion injury. In animal studies, Feb helped neurocognitive performance in mice following a brain hemorrhage. Feb was more likely to be involved in neuroprotection following cerebral hemorrhage by influencing inflammation-related pathways, based on analysis of genes after hemorrhage. Feb could attenuate the activation of the NLRP3 inflammasome, a crucial inflammatory molecule in neuroinflammation, and lower the level of inflammatory factors following cerebral hemorrhage. Feb also lowered neuronal degeneration and neuronal death in brain tissues. The protective benefits of Feb were discovered following secondary injury in cerebral hemorrhage using bioinformatics and pharmacological approaches.

While preclinical research in animal models is promising, transferring these findings into clinical applications is essential to assess the neuroprotective effect of Feb in patients with intracranial hemorrhage, human model.