Unravelling Spinal Circuits of Pain and Mechanical Allodynia
نویسندگان
چکیده
How do spinal circuits mediating tactile sensation and pain get entangled to evoke allodynia, i.e., pain sensation, in response to a normally innocuous stimulus? Recent breakthroughs are now closing this long-standing, critical gap. VGLUT3-expressing neurons and their polysynaptic connectivity to calretinin-expressing neurons are now identified as key determinants of the spinal circuitry underlying mechanical allodynia.
منابع مشابه
Interaction of NMDA and opioid receptors on thermal hyperalgesia and mechanical allodynia in two models of neuropathic pain
The use of multiple loose ligations of the rat sciatic nerve has been proposed as a model for the study of allodynia and hyperalgesia. This pain hypersensitivity results from both an increase in the peripheral and central sensitization. The evidence indicating that the development of neuropathic thermal hyperalgesia and mechanical allodynia requires activation of spinal cord NMDA receptors. NMD...
متن کاملTRPV1 in GABAergic Interneurons Mediates Neuropathic Mechanical Allodynia and Disinhibition of the Nociceptive Circuitry in the Spinal Cord
Neuropathic pain and allodynia may arise from sensitization of central circuits. We report a mechanism of disinhibition-based central sensitization resulting from long-term depression (LTD) of GABAergic interneurons as a consequence of TRPV1 activation in the spinal cord. Intrathecal administration of TRPV1 agonists led to mechanical allodynia that was not dependent on peripheral TRPV1 neurons....
متن کاملCentral Neuropathic Pain After Graft of Bone Marrow Stromal Cells in the Spinal Cord Contusion of Rat
Purpose: The purpose of this study was the investigation of thermal and mechanical Allodynia after BMSCs grafting in the Spinal Cord Contusion of rat Materials and Methods: In this study used 40 female Sprague- Dawley 6-8 week old that 33 rats received vertebral laminectomy to expose spinal cord (L1 vertebral level). The cord was then contused with the weight drop device. Experimental groups c...
متن کاملParoxetine Attenuates the Development and Existing Pain in a Rat Model of Neurophatic Pain
Background: P2X4 receptor (P2X4R), a purinoceptor expressed in activated spinal microglia, plays a key role in the pathogenesis of neuropathic pain. Spinal nerve injury induces up-regulation of P2X4R on activated microglia in the spinal cord, and blockade of this receptor can reduce neuropathic pain. The present study was undertaken to determine whether paroxetine, an inhibitor of P2X4R, could ...
متن کاملA feed-forward spinal cord glycinergic neural circuit gates mechanical allodynia.
Neuropathic pain is characterized by mechanical allodynia induced by low-threshold myelinated Aβ-fiber activation. The original gate theory of pain proposes that inhibitory interneurons in the lamina II of the spinal dorsal horn (DH) act as "gate control" units for preventing the interaction between innocuous and nociceptive signals. However, our understanding of the neuronal circuits underlyin...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Neuron
دوره 87 شماره
صفحات -
تاریخ انتشار 2015