Researchers of the Cellular and Molecular Neurobiology (CMN) Research Group at the Germans Trias i Pujol Institute (IGTP) have developed and established a novel, reproducible and minimally invasive stroke model in the pig through an endovascular approach. The work has been conducted at the Centre for Comparative Medicine and Bioimage (CMCiB), a centre devoted to translational medicine at the very core of the Can Ruti Campus in Badalona together with the IGTP and the Germans Trias i Pujol University Hospital.

“Being able to reproduce the damage in specific brain areas in the model in Specipig’s pig breed and conventional pigs is important to any study that aims to determine the true neuroprotective effect of new molecules to be tested in brains similar to those of humans.”

Teresa Gasull, Senior Research Investigator & Team leader of the CMN group

Abstract of the publication:

The need for advances in the management/treatment options for ischemic stroke patients requires that upcoming preclinical research uses animals with more human-like brain characteristics. The porcine brain is considered appropriate, although the presence of the rete mirabile (RM) prevents direct catheterization of the intracranial arteries to produce focal cerebral ischemia. To develop a reproducible minimally invasive porcine stroke model, a guide catheter and guide wire were introduced through the femoral artery until reaching the left RM. Using the pressure cooker technique, Squid-12 embolization material was deposited to fill, overflow, and occlude the left RM, the left internal carotid artery, and left circle of Willis wing up to the origins of the middle cerebral arteries (MCAs), mimicking the occlusion produced in the filament model in rodents. Longitudinal multimodal cerebral MRI was conducted to assess the brain damage and cerebral blood supply. The technique we describe here occluded up to the origins of the MCAs in 7 of 8 swine, inducing early damage 90 minutes after occlusion that later evolved to a large cerebral infarction and producing no mortality during the intervention. This minimally invasive ischemic stroke model in swine produced reproducible infarcts and shows translational features common to human stroke.

Keywords:

Neuroscience; Stroke.