Assessment started with clinical testing for mechanical hyperalgesia, mechanic dynamic allodynia as well as hypoaesthesia.
This finding could well explain heterosynaptic mechanisms underlying mechanical hyperalgesia.
Corroborating the present data, quercetin also inhibited mechanical hyperalgesia, thermal hyperalgesia, and overt pain-like behavior induced by varied stimuli in other models of inflammatory and neuropathic pain [ 21, 22, 34, 35], and the dose of 100 mg/kg of quercetin was also selected [ 21, 22, 25, 36].
Due to central adaptive mechanisms tactile hypaesthesia accompanies mechanical hyperalgesia [28].
Herein, our data demonstrated that MECM significantly reduced the mechanical hyperalgesia induced by intraplantar injection of CFA.
The mechanisms for the induction of primary mechanical hyperalgesia are unclear.
The question naturally arises of whether exogenous proNGF can produce mechanical hyperalgesia and, if so, what mechanisms are involved.
The data further support that gp130 signaling contributes to inflammation-evoked mechanical hyperalgesia, corresponding to the sensitization of nociceptive sensory neurons for mechanical stimuli by IL-6 that has been previously reported for the complete Freund's adjuvant and neuropathic pain models [ 13– 15, 31].
Available clinical data also support this concept (for example, the rapid reduction of mechanical hyperalgesia by neutralization of TNF-α in animal models of arthritis and in RA patients).
Some data suggest that TRPV4 may, in fact, play a role in the transduction of mechanical stimuli and in mechanical hyperalgesia following exposure to inflammatory mediators [ 5].
