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Updated: Aug 14, 2026

Assessment of Morphine-induced Hyperalgesia and Analgesic Tolerance in Mice Using Thermal and Mechanical Nociceptive Modalities
Published on: July 29, 2014
Acute morphine exposure potentiates the development of HSV-1-induced encephalitis
Daniel T Lioy1, Patricia A Sheridan, Sean D Hurley
1Department of Microbiology and Immunology, 575 Elmwood Ave., University of Rochester, Rochester, NY 14621, United States.
Abstract:
A devastating consequence of HSV-1 infection is development of HSV-1-induced encephalitis (HSVE). While only a minority of individuals infected with HSV-1 experiences HSVE, clearly defined variables that consistently predict development of the disease remain to be elucidated. The current study examined the effects of a single dose of morphine prior to infection with HSV-1 on the development of HSVE in BALB/cByJ mice. Acute morphine exposure was observed to potentiate the development of HSVE in HSV-1 infected mice. The present data implicate a potential role for the blood-brain barrier in the development of HSVE in morphine-treated mice.
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