PMID- 32516406 OWN - NLM STAT- MEDLINE DCOM- 20210101 LR - 20211231 IS - 1552-5783 (Electronic) IS - 0146-0404 (Print) IS - 0146-0404 (Linking) VI - 61 IP - 6 DP - 2020 Jun 3 TI - Role of TH17 Responses in Increasing Herpetic Keratitis in the Eyes of Mice Infected with HSV-1. PG - 20 LID - 10.1167/iovs.61.6.20 [doi] LID - 20 AB - PURPOSE: TH17 cells play an important role in host defense and autoimmunity yet very little is known about the role of IL17 in herpes simplex virus (HSV)-1 infectivity. To better understand the relationship between IL17 and HSV-1 infection, we assessed the relative impact of IL17A-deficiency and deficiency of its receptors on HSV-1 responses in vivo. METHODS: We generated IL17RA-/- and IL17RA-/-RC-/- mice in-house and infected them along with IL17A-/- and IL17RC-/- mice in the eyes with 2 x 105 PFU/eye of wild type (WT) HSV-1 strain McKrae. WT C57BL/6 mice were used as control. Virus replication in the eye, survival, corneal scarring (CS), angiogenesis, levels of latency-reactivation, and levels of CD8 and exhaustion markers (PD1, TIM3, LAG3, CTLA4, CD244, and CD39) in the trigeminal ganglia (TG) of infected mice were determined on day 28 postinfection. RESULTS: No significant differences in virus replication in the eye, survival, latency, reactivation, and exhaustion markers were detected among IL17A-/-, IL17RA-/-, IL17RC-/-, IL17RA-/-RC-/-, and WT mice. However, mice lacking IL17 had significantly less CS and angiogenesis than WT mice. In addition, angiogenesis levels in the absence of IL17RC and irrespective of the absence of IL17RA were significantly less than in IL17A- or IL17RA-deficient mice. CONCLUSIONS: Our results suggest that the absence of IL17 protects against HSV-1-induced eye disease, but has no role in protecting against virus replication, latency, or reactivation. In addition, our data provide rationale for blocking IL17RC function rather than IL17A or IL17RA function as a key driver of HSV-1-induced eye disease. FAU - Hirose, Satoshi AU - Hirose S AD - ,. FAU - Jaggi, Ujjaldeep AU - Jaggi U AD - ,. FAU - Wang, Shaohui AU - Wang S AD - ,. FAU - Tormanen, Kati AU - Tormanen K AD - ,. FAU - Nagaoka, Yoshiko AU - Nagaoka Y AD - ,. FAU - Katsumata, Makoto AU - Katsumata M AD - ,. FAU - Ghiasi, Homayon AU - Ghiasi H AD - ,. LA - eng GR - R01 EY015557/EY/NEI NIH HHS/United States GR - R01 EY029677/EY/NEI NIH HHS/United States GR - R01 EY024649/EY/NEI NIH HHS/United States GR - R01 EY014966/EY/NEI NIH HHS/United States GR - R01 EY026944/EY/NEI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PL - United States TA - Invest Ophthalmol Vis Sci JT - Investigative ophthalmology & visual science JID - 7703701 RN - 0 (Biomarkers) RN - 0 (Il17a protein, mouse) RN - 0 (Interleukin-17) SB - IM MH - Animals MH - Biomarkers/metabolism MH - Corneal Neovascularization/metabolism/physiopathology/virology MH - Disease Models, Animal MH - Herpesvirus 1, Human/*physiology MH - Interleukin-17/metabolism MH - Keratitis, Herpetic/metabolism/*physiopathology/virology MH - Latent Infection MH - Mice MH - Mice, Inbred C57BL MH - Polymerase Chain Reaction MH - Th17 Cells/*physiology MH - Virulence MH - Virus Latency/physiology MH - Virus Replication/physiology PMC - PMC7415293 COIS- Disclosure: S. Hirose, None; U. Jaggi, None; S. Wang, None; K. Tormanen, None; Y. Nagaoka, None; M. Katsumata, None; H. Ghiasi, None EDAT- 2020/06/10 06:00 MHDA- 2021/01/02 06:00 PMCR- 2020/06/09 CRDT- 2020/06/10 06:00 PHST- 2020/06/10 06:00 [entrez] PHST- 2020/06/10 06:00 [pubmed] PHST- 2021/01/02 06:00 [medline] PHST- 2020/06/09 00:00 [pmc-release] AID - 2766326 [pii] AID - IOVS-20-30081 [pii] AID - 10.1167/iovs.61.6.20 [doi] PST - ppublish SO - Invest Ophthalmol Vis Sci. 2020 Jun 3;61(6):20. doi: 10.1167/iovs.61.6.20.