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A Guide to Preclinical Models of Zoster-Associated Pain and Postherpetic Neuralgia

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Varicella-zoster Virus

Part of the book series: Current Topics in Microbiology and Immunology ((CT MICROBIOLOGY,volume 438))

Abstract

Reactivation of latent varicella-zoster virus (VZV) causes herpes zoster (HZ), which is commonly accompanied by acute pain and pruritus over the time course of a zosteriform rash. Although the rash and associated pain are self-limiting, a considerable fraction of HZ cases will subsequently develop debilitating chronic pain states termed postherpetic neuralgia (PHN). How VZV causes acute pain and the mechanisms underlying the transition to PHN are far from clear. The human-specific nature of VZV has made in vivo modeling of pain following reactivation difficult to study because no single animal can reproduce reactivated VZV disease as observed in the clinic. Investigations of VZV pathogenesis following primary infection have benefited greatly from human tissues harbored in immune-deficient mice, but modeling of acute and chronic pain requires an intact nervous system with the capability of transmitting ascending and descending sensory signals. Several groups have found that subcutaneous VZV inoculation of the rat induces prolonged and measurable changes in nociceptive behavior, indicating sensitivity that partially mimics the development of mechanical allodynia and thermal hyperalgesia seen in HZ and PHN patients. Although it is not a model of reactivation, the rat is beginning to inform how VZV infection can evoke a pain response and induce long-lasting alterations to nociception. In this review, we will summarize the rat pain models from a practical perspective and discuss avenues that have opened for testing of novel treatments for both zoster-associated pain and chronic PHN conditions, which remain in critical need of effective therapies.

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Acknowledgements

The authors would like to acknowledge support by Public Health Service Awards from the National Institutes of Health (NIH) grants R01 NS064022, RO1 AI122640 (Kinchington), and R01 DE026749 (Kramer). BEW was supported by a T32 Award EY017272. The authors also acknowledge support by grants from Charles and Virginia Kaufmann Foundation, an NIH CORE grant P30 EY08098, and unrestricted support from the Eye and Ear Foundation of Pittsburgh and Research to Prevent Blindness Inc, New York, NY. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

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Correspondence to Paul R. Kinchington .

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© 2021 The Author(s), under exclusive license to Springer Nature Switzerland AG

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Warner, B.E., Goins, W.F., Kramer, P.R., Kinchington, P.R. (2021). A Guide to Preclinical Models of Zoster-Associated Pain and Postherpetic Neuralgia. In: Arvin, A.M., Moffat, J.F., Abendroth, A., Oliver, S.L. (eds) Varicella-zoster Virus. Current Topics in Microbiology and Immunology, vol 438. Springer, Cham. https://doi.org/10.1007/82_2021_240

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