The Role of Tenascin-C in Neuroinflammation and Neuroplasticity.

Tenascin-C (TNC) is a complex extracellular matrix (ECM) protein that plays a critical role in regulating cellular adhesion, motility, proliferation, and inflammation through its interaction with Toll-like receptor 4 (TLR4) and other receptors. The upregulation of TNC is associated with inflammatory responses, autoimmune disorders, and neoplastic conditions during both physiological and pathological tissue remodeling. In the central nervous system (CNS), TNC contributes to neuroinflammatory processes by modulating the function of immune cells and the secretion of pro-inflammatory mediators, thereby playing a pivotal role in the initiation and progression of neuroinflammatory diseases. TNC is expressed in astrocytes, neural progenitor cells, and various neuronal populations within both developing and mature CNS regions. It regulates neuronal migration and axonal guidance during neurogenesis, facilitating synaptic plasticity and CNS regeneration. Furthermore, TNC enhances neuroplasticity through interactions with receptor families, such as integrins, to establish the molecular connections necessary for cell communication and signal transduction. This review investigates the mechanistic properties of TNC, focusing on its spatiotemporal expression, molecular interactions with receptors, and its role in neurological disorders, in addition to its modulatory capacity in neuroplastic processes. Additionally, this review delves into recent research advancements with respect to neuroinflammation involving TNC, along with therapeutic strategies targeting TNC.