Leukemia Inhibitory Factor Decreases Neurogenesis and Angiogenesis in a Rat Model of Intracerebral Hemorrhage

Abstract

Neurogenesis and angiogenesis can improve the neurologic function after intracerebral hemorrhage (ICH). Leukemia inhibitory factor (LIF) plays an important role in neurogenesis and angiogenesis. In this study, a rat model of autologous blood-induced ICH was used to evaluate the effect of LIF on the neurogenesis and angiogenesis following ICH. After ICH, LIF-positive neurons and dilated vessels were detected in the peri-hematomal region. It was found that LIF levels increased significantly and peaked 14 days after ICH induction. Double immunofluorescence confirmed that LIF was expressed in neurons and endothelial cells. ICH also led to increases of doublecortin (DCX)- and von Willebrand factor (vWF)-positive cells as well as proliferation of cell nuclear antigen (PCNA)+/DCX+ and PCNA+/vWF+ nuclei. All these ICH-induced increases were significantly attenuated by exogenous LIF infusion. These data suggested that LIF was a negative regulator of neurogenesis and angiogenesis after ICH.

Keywords

intracerebral hemorrhage / neurogenesis / angiogenesis / leukemia inhibitory factor

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