Structure-Based Dissection of the Active Site Chemistry of Leukotriene A4 Hydrolase: Implications for M1 Aminopeptidases and Inhibitor Design

M1 aminopeptidases comprise a large family of biologically important zinc enzymes. We show that peptide turnover by the M1 prototype, leukotriene A4 hydrolase/ aminopeptidase, involves a shift in substrate position associated with exchange of zinc coordinating groups,while maintaining the overall coordination geometry. The transition state is stabilized by residues conserved among M1 members and in […] Read full post »

Antinociceptive and anti-allodynic effects of oral PL37, a complete inhibitor of enkephalin-catabolizing enzymes, in a rat model of peripheral neuropathic pain induced by vincristine

Vincristine is a common anti-cancer therapy administered for the treatment of many types of tumors. Its dose-limiting side effect is the production of peripheral neuropathy, resulting in chronic neuropathic pain in many patients. An animal model of vincristine-induced sensory neuropathy was developed after repeated intraperitoneal injection in male rats and used in the present work […] Read full post »

Inhibition of osteosarcoma-induced thermal hyperalgesia in mice by the orally active dual enkephalinase inhibitor PL37. Potentiation by gabapentin

We have previously shown that stimulation of peripheral opioid receptors by exogenous opiates counteracts the thermal hyperalgesia elicited by a tibial osteosarcoma due to intraosteal inoculation of NCTC 2472 cells to mice. Aiming to study whether pheripheral endogenous enkephalins could also counteract this painful symptom, we assayed in this model the effects of PL37, an […] Read full post »

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