Improvement of central retinal sensitivity six months after topical isopropyl unoprostone in patients with retinitis pigmentosa
Aims: Isopropyl unoprostone (IU), a maxi-K channel activator, is used topically to treat glaucoma, and has been reported to have neuroprotective effects on retinal neurons in vitro and in vivo. The purpose of this non-comparative pilot study was to determine whether topical IU will alter the sensiti...
Main Authors: | , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Wolters Kluwer Medknow Publications
2013-01-01
|
Series: | Indian Journal of Ophthalmology |
Subjects: | |
Online Access: | http://www.ijo.in/article.asp?issn=0301-4738;year=2013;volume=61;issue=3;spage=95;epage=99;aulast=Tawada |
id |
doaj-b864e855fba3478192430fe1174e2c6b |
---|---|
record_format |
Article |
spelling |
doaj-b864e855fba3478192430fe1174e2c6b2020-11-24T20:56:20ZengWolters Kluwer Medknow PublicationsIndian Journal of Ophthalmology0301-47381998-36892013-01-01613959910.4103/0301-4738.109377Improvement of central retinal sensitivity six months after topical isopropyl unoprostone in patients with retinitis pigmentosaAyako TawadaTakeshi SugawaraKazuha OgataAkira HagiwaraShuichi YamamotoAims: Isopropyl unoprostone (IU), a maxi-K channel activator, is used topically to treat glaucoma, and has been reported to have neuroprotective effects on retinal neurons in vitro and in vivo. The purpose of this non-comparative pilot study was to determine whether topical IU will alter the sensitivity of the central retina in patients with retinitis pigmentosa (RP). Settings and Design : Non-comparative pilot study. Materials and Methods : IU was given topically twice a day for 6 months to both eyes of 30 patients with typical RP. The visual acuity was measured with a Japanese Snellen chart, and the mean retinal sensitivities were obtained by fundus-related microperimetry (MP-1). The mean deviation (MD) of the visual field was determined with a Humphrey field analyzer (HFA). All measurements were made before and 6 months after the treatment. Statistical Analysis Used : Wilcoxon and the Mann-Whitney U tests (SPSS, SPSS Inc., Chicago, IL). Results: After the treatment, the mean retinal sensitivity within the central 2° and 10° improved significantly from 12.3 ± 4.8 dB to 14.7 ± 5.5 dB (P = 0.001) and from 9.1 ± 5.4 dB to 11.0 ± 6.2 dB (P = 0.001), respectively. Conclusions: These short-term results suggest topical IU can improve the central retinal sensitivity in RP patients. It will be necessary to examine longer treatment periods in a controlled study to determine the effectiveness of topical IU in RP patients.http://www.ijo.in/article.asp?issn=0301-4738;year=2013;volume=61;issue=3;spage=95;epage=99;aulast=TawadaHumphrey field analyzerisopropyl unoprostonemicroperimetryretinitis pigmentosa |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Ayako Tawada Takeshi Sugawara Kazuha Ogata Akira Hagiwara Shuichi Yamamoto |
spellingShingle |
Ayako Tawada Takeshi Sugawara Kazuha Ogata Akira Hagiwara Shuichi Yamamoto Improvement of central retinal sensitivity six months after topical isopropyl unoprostone in patients with retinitis pigmentosa Indian Journal of Ophthalmology Humphrey field analyzer isopropyl unoprostone microperimetry retinitis pigmentosa |
author_facet |
Ayako Tawada Takeshi Sugawara Kazuha Ogata Akira Hagiwara Shuichi Yamamoto |
author_sort |
Ayako Tawada |
title |
Improvement of central retinal sensitivity six months after topical isopropyl unoprostone in patients with retinitis pigmentosa |
title_short |
Improvement of central retinal sensitivity six months after topical isopropyl unoprostone in patients with retinitis pigmentosa |
title_full |
Improvement of central retinal sensitivity six months after topical isopropyl unoprostone in patients with retinitis pigmentosa |
title_fullStr |
Improvement of central retinal sensitivity six months after topical isopropyl unoprostone in patients with retinitis pigmentosa |
title_full_unstemmed |
Improvement of central retinal sensitivity six months after topical isopropyl unoprostone in patients with retinitis pigmentosa |
title_sort |
improvement of central retinal sensitivity six months after topical isopropyl unoprostone in patients with retinitis pigmentosa |
publisher |
Wolters Kluwer Medknow Publications |
series |
Indian Journal of Ophthalmology |
issn |
0301-4738 1998-3689 |
publishDate |
2013-01-01 |
description |
Aims: Isopropyl unoprostone (IU), a maxi-K channel activator, is used topically to treat glaucoma, and has been reported to have neuroprotective effects on retinal neurons in vitro and in vivo. The purpose of this non-comparative pilot study was to determine whether topical IU will alter the sensitivity of the central retina in patients with retinitis pigmentosa (RP). Settings and Design : Non-comparative pilot study. Materials and Methods : IU was given topically twice a day for 6 months to both eyes of 30 patients with typical RP. The visual acuity was measured with a Japanese Snellen chart, and the mean retinal sensitivities were obtained by fundus-related microperimetry (MP-1). The mean deviation (MD) of the visual field was determined with a Humphrey field analyzer (HFA). All measurements were made before and 6 months after the treatment. Statistical Analysis Used : Wilcoxon and the Mann-Whitney U tests (SPSS, SPSS Inc., Chicago, IL). Results: After the treatment, the mean retinal sensitivity within the central 2° and 10° improved significantly from 12.3 ± 4.8 dB to 14.7 ± 5.5 dB (P = 0.001) and from 9.1 ± 5.4 dB to 11.0 ± 6.2 dB (P = 0.001), respectively. Conclusions: These short-term results suggest topical IU can improve the central retinal sensitivity in RP patients. It will be necessary to examine longer treatment periods in a controlled study to determine the effectiveness of topical IU in RP patients. |
topic |
Humphrey field analyzer isopropyl unoprostone microperimetry retinitis pigmentosa |
url |
http://www.ijo.in/article.asp?issn=0301-4738;year=2013;volume=61;issue=3;spage=95;epage=99;aulast=Tawada |
work_keys_str_mv |
AT ayakotawada improvementofcentralretinalsensitivitysixmonthsaftertopicalisopropylunoprostoneinpatientswithretinitispigmentosa AT takeshisugawara improvementofcentralretinalsensitivitysixmonthsaftertopicalisopropylunoprostoneinpatientswithretinitispigmentosa AT kazuhaogata improvementofcentralretinalsensitivitysixmonthsaftertopicalisopropylunoprostoneinpatientswithretinitispigmentosa AT akirahagiwara improvementofcentralretinalsensitivitysixmonthsaftertopicalisopropylunoprostoneinpatientswithretinitispigmentosa AT shuichiyamamoto improvementofcentralretinalsensitivitysixmonthsaftertopicalisopropylunoprostoneinpatientswithretinitispigmentosa |
_version_ |
1716790030785052672 |