PMID- 21429183 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20110714 LR - 20220318 IS - 2042-4280 (Electronic) IS - 2042-4280 (Linking) VI - 2 IP - 1 DP - 2011 Mar 15 TI - Circulating herpes simplex type 1 (HSV-1)-specific CD8+ T cells do not access HSV-1 latently infected trigeminal ganglia. PG - 5 LID - 10.1186/2042-4280-2-5 [doi] AB - BACKGROUND: Therapeutic vaccines can be designed to enhance existing T cell memory populations for increased protection against re-infection. In the case of herpes simplex virus type 1, recurrent disease results from reactivation of latent virus in sensory ganglia, which is controlled in part by a ganglia-resident HSV-specific memory CD8+ T cell population. Thus, an important goal of a therapeutic HSV-1 vaccine would be to enhance this population. METHODS: HSV-1-infected mice were treated with TAK-779 to block CCR5- and CXCR3-mediated CD8+ T cell migration during both acute and latent infections. Additionally, HSV-1-specific CD8+ T cells were transferred into HSV-1 latently infected mice to mimic the effect of a therapeutic vaccine, and their migration into trigeminal ganglia (TG) was traced during steady-state latency, or during recovery of the TG-resident memory CD8+ T cell population following stress-, and corticosterone-induced depletion and HSV-1 reactivation from latency. Bromodeoxy uridine (BrdU) incorporation measured cell proliferation in vivo. RESULTS: TAK-779 treatment during acute HSV-1 infection reduced the number of infiltrating CD8+ T cells but did not alter the number of viral genome copies. TAK-779 treatment during HSV latency did not affect the size of the TG-resident memory CD8+ T cell population. Transferred HSV-specific CD8+ T cells failed to access latently infected TG during steady-state latency, or during recovery of the TG resident HSV-specific CD8+ T cell population following exposure of latently infected mice to stress and corticosterone. Recovery of the HSV-specific CD8+ T cell population after stress and corticosterone treatment occurred with homeostatic levels of cell division and did not require CD4+ T cell help. CONCLUSIONS: Our findings are consistent with the notion that the CD8+ T cells in latently infected TG are a tissue-resident memory (Trm) population that is maintained without replenishment from the periphery, and that when this population is disrupted, it recovers without proliferation or detectable recruitment of HSV-specific CD8+ T cells from the blood. The compartmentalization of the HSV-specific CD8+ memory T cell population in latently infected TG will complicate the design of therapeutic vaccines. FAU - Himmelein, Susanne AU - Himmelein S AD - Department of Neurology, Klinikum Grosshadern, Ludwig-Maximilians University, Munich, Germany. FAU - St Leger, Anthony J AU - St Leger AJ AD - Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213 USA. AD - Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213 USA. FAU - Knickelbein, Jared E AU - Knickelbein JE AD - Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213 USA. FAU - Rowe, Alexander AU - Rowe A AD - Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213 USA. FAU - Freeman, Michael L AU - Freeman ML AD - Trudeau Institute, Saranac Lake, NY 12983 USA. FAU - Hendricks, Robert L AU - Hendricks RL AD - Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213 USA. AD - Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213 USA. AD - Department of Molecular Genetics & Biochemistry, University of Pittsburgh, Pittsburgh, PA 15213 USA. LA - eng PT - Journal Article DEP - 20110315 PL - England TA - Herpesviridae JT - Herpesviridae JID - 101551529 PMC - PMC3070622 EDAT- 2011/03/25 06:00 MHDA- 2011/03/25 06:01 PMCR- 2011/03/15 CRDT- 2011/03/25 06:00 PHST- 2010/11/23 00:00 [received] PHST- 2011/03/15 00:00 [accepted] PHST- 2011/03/25 06:00 [entrez] PHST- 2011/03/25 06:00 [pubmed] PHST- 2011/03/25 06:01 [medline] PHST- 2011/03/15 00:00 [pmc-release] AID - 2042-4280-2-5 [pii] AID - 10.1186/2042-4280-2-5 [doi] PST - epublish SO - Herpesviridae. 2011 Mar 15;2(1):5. doi: 10.1186/2042-4280-2-5.