Telocytes in neuromuscular tissues: Integrating morphological and immunohistochemical evidence

Telocytes are specialized stromal cells with roles in tissue organization, development, and regeneration. Their unique morphology (long telopodes expressing CD34/PDGFR-α) and 3D networking capabilities position them as potential key players in neuromuscular function and repair, though their mechanistic contributions remain underexplored.

This study investigates the structural and functional relationships between TCs and neuromuscular structures to evaluate their therapeutic potential for nerve injuries and degenerative disorders.

Histochemical analysis was performed using hematoxylin & eosin (H&E), silver impregnation, Mallory trichrome, and Weigert-Van Gieson stains. Transmission electron microscopy (TEM) was employed for ultrastructural evaluation. Immunohistochemical characterization included CD34, CD21, CD68, and VEGF markers to identify telocyte distribution and their interactions with neuromuscular structures.

TCs formed intricate networks enveloping neuromuscular junctions and secreted signaling vesicles to modulate extracellular matrix dynamics. Their anatomical positioning and secretory activity suggest regulatory roles in proprioception, motor control, and sensory function. Clinically, Telocytes networks demonstrated scaffold-like properties conducive to nerve regeneration. Immunohistochemical analysis revealed CD34⁺/VEGF⁺ telocytes (TCs) forming extensive networks encircling neuromuscular junctions, while CD21⁺ and CD68⁺ cells showed distinct spatial distributions.

Telocytes serve dual architectural and signaling functions in neuromuscular systems, offering promising therapeutic targets for peripheral neuropathies, muscle atrophy, and regenerative strategies. Their signatures may also serve as diagnostic biomarkers. This work establishes a foundation for future TC-based therapies to address nerve injuries and degenerative diseases, bridging critical gaps in neuromuscular biology.