Multiple endogenous growth factor receptors in peripheral nerve repair context

Multiple endogenous growth factor receptors in the context of peripheral nerve repair represent a diverse class of signaling proteins that orchestrate the regenerative response following nerve injury [1, 3]. This group primarily includes receptor tyrosine kinases (RTKs) such as the Tropomyosin receptor kinases (TrkA, TrkB, TrkC), Glial cell line-derived neurotrophic factor receptors (GFRα), and receptors for Fibroblast Growth Factor (FGFR) and Insulin-like Growth Factor (IGF-1R), as well as the p75 neurotrophin receptor (p75NTR) [1, 5]. These receptors are expressed by neurons and Schwann cells, where they activate critical intracellular pathways like PI3K/Akt and MAPK/ERK to support neuronal survival, stimulate axonal outgrowth, and facilitate the dedifferentiation and proliferation of Schwann cells necessary for remyelination [2, 3]. In clinical and research settings, these receptors are targeted to overcome the limited natural regenerative capacity of the nervous system, particularly in severe peripheral nerve injuries [3]. Therapeutic strategies often involve the delivery of exogenous growth factors or the use of bioengineered scaffolds to provide sustained receptor activation at the injury site [3, 4]. While promising, targeting these receptors faces challenges such as the rapid degradation of protein ligands, the need for precise spatial and temporal control of signaling, and potential side effects including hyperalgesia and the theoretical risk of promoting tumor growth through sustained mitogenic stimulation [3, 5].

Other names

Growth factor receptors in peripheral nerve injuryNeurotrophic factor receptorsNeurotrophin receptorsNerve regeneration receptorsReceptor tyrosine kinases in nerve repair

Activation of receptor tyrosine kinase (RTK) and serine/threonine kinase signaling pathways, including PI3K/Akt and MAPK/ERK cascades, to promote neuronal survival and axonal regeneration.