Frédéric Duflo

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UNLABELLED We evaluated the circulating and lung oxidative status during general anesthesia established with propofol, sevoflurane, or desflurane in mechanically ventilated swine. Blood samples and bronchoalveolar lavage fluid (BAL) specimens were respectively performed via an internal jugular vein catheter and a nonbronchoscopic BAL for baseline oxidative(More)
BACKGROUND Previous pharmacologic and molecular studies suggest that the alpha(2)-adrenoceptor subtype A is the target for spinally administered alpha(2)-adrenergic agonists, i.e., clonidine, for pain relief. However, intrathecally administered alpha(2) C antisense oligodeoxynucleotide was recently reported to decrease antinociception induced by clonidine(More)
Nerve injury resulting in chronic pain is associated with novel excitatory effects of norepinephrine on injured peripheral nerve terminals and their cell bodies, due to actions on alpha2-adrenoceptors. Paradoxically, alpha2-adrenoceptor agonists administered near peripheral terminals or their cell bodies results in analgesia, not pain. This study tested,(More)
Intrathecal and epidural administration of the alpha2-adrenergic receptor agonist clonidine in humans results in analgesia to both acute nociceptive and chronic neuropathic pain. The potency of clonidine increases with hypersensitivity to mechanical stimuli after nerve injury, although the reasons for this change are unknown. In the present study, we tested(More)
BACKGROUND A recent model of acute incisional pain has been characterized that strongly parallels the postoperative period in patients experiencing evoked pain. In that setting, abundant literature has revealed antihypersensitive effects produced by intrathecally administered alpha2-adrenergic receptor agonists, such as clonidine, in both animals and(More)
BACKGROUND Alpha 2 adrenoceptor agonists produce antinociception in normal animals and alleviate mechanical allodynia in animals with nerve injury, although their mechanism of action may differ in these situations. The purpose of this study was to examine the location and number of cells in the spinal cord activated by intrathecal clonidine in these two(More)
BACKGROUND Previous studies suggest that the alpha adrenoceptor subtype is the target for spinally administered alpha -adrenergic agonists, clonidine, for pain relief. However, ST 91, a preferential alpha adrenoceptor subtype agonist, induces antinociception, and intrathecally administered alpha antisense oligodeoxynucleotide decreases antinociception(More)
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