The hypothesis of stress induced disturbances of the sensitivity of the muscle spindle via sympathetic regulation originates from animal studies [ 18, 19, 32, 33] demonstrating sympathetic fibres penetrating into the muscle spindle capsule [ 16] and the presence of adrenergic receptors inside the muscle spindle [ 17].
Animal studies have shown the presence of sympathetic fibres [ 16] and adrenergic receptors inside the muscle spindle [ 17], and demonstrated how sympathetic stimulation during a muscle stretch reduced the muscle spindle sensitivity in rabbit jaw muscles [ 18, 19].
He also demonstrated a sympathetic interest in popular modern writers such as John le Carré and JRR Tolkien and edited a set of classic 19th-century detective stories for Atlantic Books.
Our previous studies demonstrated that sympathetic denervation could promote MSC mobilization, thereby enhancing bone formation in distraction osteogenesis (DO), a self-tissue engineering for craniofacial and orthopeadic surgeries.
These authors also demonstrated central sympathetic nervous system hyperactivity, reduced baroreflex sensitivity and vagal hypotonia in rats treated chronically with lead.
Previously, it had been demonstrated that sympathetic denervation of WAT triggers an increase in fat cell number, which might be due to preadipocyte proliferation or maturation of existing preadipocytes [17].
Similarly, HRV findings in a study of 239 hemodialysis patients demonstrated drastic sympathetic over-activity and vagal withdrawal [ 15].
In conclusion, our work has demonstrated that sympathetic innervation could be effectively induced into engrafted engineered cardiomyocyte sheets by GDNF.
In addition, Shinder et al demonstrated that sympathetic basket-skeins were observed in the DRGs excised from human neuropathic pain patients.
In this regard, one previous study demonstrated that sympathetic activation may negatively influence arterial stiffness in human, independent of BP [ 33].
Such JNK-independent activation of c-Jun has also been demonstrated in sympathetic neurons [ 25], supporting our observations in SCs in the sciatic nerve.
