Chronic pain alters microvascular architectural organization of somatosensory cortex
Zippo, A. G.; Del Grosso, V.; Patera, A.; Riccardi, M. P.; Tredici, I. G.; Bertoli, G. R.; Mittone, A.; Valente, M.; Stampanoni, M.; Coan, P.; Bravin, A.; Biella, G. M. E.
Show abstract
Chronic pain (CP) represents a complex pathology profoundly involving both neural and glial compartments of the central nervous system. While most CP studies have also investigated the macroscopic brain vascular system, its microstructural architecture still remains largely unexplored. Further, the adaptive modifications of the vascular microstructure as consequence of diseases or pathological insults, did not receive adequate attention. Here we show microtomographic signs of diffuse and conspicuous microvascular neogenesis in somatosensory cortex of CP animal models already peaking at 15 days from the model instantiation. Progressive fading of this microvessel neogenesis then ensued in the next six months yet maintaining higher vascular density with a preserved small fraction of them. Due to the important consequences on the neuron-glial-vessel arrangements and on the resulting metabolic and functional disorders of the local networks, novel additional scenarios of CP are thus conceivable with profound consequences of potential future CP diagnostic and therapeutic appraisals.
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