Corneal nerves are necessary for adrenergic reactivation of ocular herpes.

Abstract:

:Herpes simplex virus type 1 (HSV-1) can infect the cornea and achieve ganglionic latency. HSV-1 can later be activated by a variety of effectors although the exact mechanism of reactivation is unknown. Rabbits harboring latent HSV-1 strain McKrae can be induced to shed virus by ocular iontophoresis of epinephrine to the cornea. No studies have been done to investigate if corneal nerves are necessary for epinephrine induction of HSV-1 ocular shedding. We did penetrating keratoplasty (PKP) in one eye each of 23 rabbits; the other eye served as an unoperated control. The surgery effectively denervates the area of the transplant for up to 90 days. Eighteen rabbits carrying latent HSV-1 strain McKrae received corneas from uninfected rabbits. Five uninfected rabbits with no latent virus received corneas from rabbits harboring latent HSV-1. On days 10-14 after penetrating keratoplasty, 24 eyes in the HSV-1 latent group and all ten uninfected eyes received iontophoresis of 0.01% epinephrine (0.8 mAmps for 8 min or 0.6 mAmps for 6 min) once daily for 3 days by means of an eye cup whose diameter was less than the diameter of the transplant. Six rabbits in the HSV-1 latent group received intravenous injections of cyclophosphamide (75 mg/kg) and dexamethasone (4 mg/kg). Following iontophoretic or immunosuppressive induction, the eyes were swabbed daily for 9 days. Of the 12 rabbits with latent virus which were treated by iontophoresis, one of the transplanted eyes and eight of the nontransplanted eyes were induced to shed virus. The mean duration of shedding in the nontransplanted eyes was 3.25 days.(ABSTRACT TRUNCATED AT 250 WORDS)

authors

Rootman DS,Haruta Y,Hill JM,Kaufman HE

subject

Has Abstract

pub_date

1988-03-01 00:00:00

pages

351-6

issue

3

eissn

0146-0404

issn

1552-5783

journal_volume

29

pub_type

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