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Nagaoka T, Yokota H, Watanabe M, Aso H, Takase K, Hanaguri J, Ohno A, Kushiyama A, Harino S, Yamagami S. Impairment of flicker-induced increase in retinal blood flow in diabetic pigs. Jpn J Ophthalmol 2024:10.1007/s10384-024-01073-3. [PMID: 38874665 DOI: 10.1007/s10384-024-01073-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 04/01/2024] [Indexed: 06/15/2024]
Abstract
PURPOSE To evaluate retinal blood flow (RBF) regulation in response to RBF stress in maturity-onset diabetes of the young type 3 (MODY3) pigs. STUDY DESIGN Case-control study. METHODS MODY3 pigs (diabetes mellitus [DM] group, n = 8) transfected with the human mutant hepatocyte nuclear factor-1⍺ and normal pigs of the same age (normal group, n = 8) were used as subjects. After confirming DM onset, the experiment was performed under inhalation anesthesia with isoflurane at 2 months of age before the cataract progressed. Ocular blood flow was assessed by calculating the optic papillary mean blur rate using laser speckle flowgraphy, modified for pig eye measurements. After baseline ocular blood flow measurements, flicker stimulation (12 Hz, 3 min) was applied, and ocular blood flow was measured over time. RESULTS Blood glucose was 81.8 ± 5.1 mg/dL in the normal group and 311.4 ± 23.1 mg/dL in the DM group (mean ± standard error). The percent change in ocular blood flow at 3 min after flicker stimulation was +31.0 ± 10.9% in the normal group and -6.6 ± 6.5% in the DM group compared to the preload value, and the difference was statistically significant (Mann-Whitney test, P = 0.015). CONCLUSION RBF response to flicker stimulation is reduced at 2 months of age in MODY3 pigs, suggesting that retinal neurovascular coupling is impaired from the early onset of DM.
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Affiliation(s)
- Taiji Nagaoka
- Division of Ophthalmology, Department of Visual Sciences, Nihon University School of Medicine, 30-1 Oyaguchi-Kamicho, Itabashi-ku, Tokyo, 173-8610, Japan.
- Department of Ophthalmology, Asahikawa Medical University, Asahikawa, Japan.
| | - Harumasa Yokota
- Division of Ophthalmology, Department of Visual Sciences, Nihon University School of Medicine, 30-1 Oyaguchi-Kamicho, Itabashi-ku, Tokyo, 173-8610, Japan
| | - Masahisa Watanabe
- Division of Ophthalmology, Department of Visual Sciences, Nihon University School of Medicine, 30-1 Oyaguchi-Kamicho, Itabashi-ku, Tokyo, 173-8610, Japan
| | - Hiroshi Aso
- Division of Ophthalmology, Department of Visual Sciences, Nihon University School of Medicine, 30-1 Oyaguchi-Kamicho, Itabashi-ku, Tokyo, 173-8610, Japan
| | - Koyo Takase
- Division of Ophthalmology, Department of Visual Sciences, Nihon University School of Medicine, 30-1 Oyaguchi-Kamicho, Itabashi-ku, Tokyo, 173-8610, Japan
| | - Junya Hanaguri
- Division of Ophthalmology, Department of Visual Sciences, Nihon University School of Medicine, 30-1 Oyaguchi-Kamicho, Itabashi-ku, Tokyo, 173-8610, Japan
| | - Akira Ohno
- Division of Ophthalmology, Department of Visual Sciences, Nihon University School of Medicine, 30-1 Oyaguchi-Kamicho, Itabashi-ku, Tokyo, 173-8610, Japan
| | - Akifumi Kushiyama
- Department of Pharmacotherapy, Meiji Pharmaceutical University, Tokyo, Japan
| | | | - Satoru Yamagami
- Division of Ophthalmology, Department of Visual Sciences, Nihon University School of Medicine, 30-1 Oyaguchi-Kamicho, Itabashi-ku, Tokyo, 173-8610, Japan
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Kiyota N, Shiga Y, Ninomiya T, Tsuda S, Omodaka K, Himori N, Yokoyama Y, Pak K, Nakazawa T. The Effect of β-Blocker Eye Drops on Pulse Rate, Ocular Blood Flow, and Glaucoma Progression: A Retrospective Longitudinal Study. Adv Ther 2024; 41:730-743. [PMID: 38169060 PMCID: PMC10838819 DOI: 10.1007/s12325-023-02762-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Accepted: 12/05/2023] [Indexed: 01/05/2024]
Abstract
INTRODUCTION Our study was conducted to determine factors associated with the effectiveness of a β-blocker eye drop add-on in altering pulse rate (PR) in glaucoma patients. METHODS This retrospective study examined 236 eyes of 138 patients who received a β-blocker eye drop add-on during follow-up. Patients were included if at least one PR measurement was available both before and after the add-on was started. We collected data on ophthalmic parameters: longitudinal PR; longitudinal choroidal blood flow, represented by laser speckle flowgraphy-measured mean blur rate (MBR); and diacron-reactive oxygen metabolites (d-ROMs). We used a multivariable linear mixed-effects model to investigate the effectiveness of the β-blocker eye drop add-on in altering PR and examined factors contributing to a larger PR alteration after the add-on was started by analyzing the effect on PR of the interaction term between the add-on and clinical factors. We used the k-means method to classify the patients. RESULTS The β-blocker eye drop add-on reduced PR (- 7.61 bpm, P < 0.001). Female gender, higher PR when the add-on was started, lower central corneal thickness, and a higher d-ROM level were associated with greater reduction in PR (P < 0.05). In a cluster of patients with these clinical features, choroidal MBR increased by + 3.42% when we adjusted for change over time; MD slope, which represents the speed of glaucoma progression, improved by + 0.64 dB/year (P < 0.05). CONCLUSIONS We identified a glaucoma subgroup in which PR decreased, choroidal blood flow increased, and glaucoma progression slowed after a β-blocker eye drop add-on was started.
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Affiliation(s)
- Naoki Kiyota
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan
| | - Yukihiro Shiga
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan
| | - Takahiro Ninomiya
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan
| | - Satoru Tsuda
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan
| | - Kazuko Omodaka
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan
| | - Noriko Himori
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan
- Department of Aging Vision Healthcare, Tohoku University Graduate School of Biomedical Engineering, Sendai, Japan
| | - Yu Yokoyama
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan
| | - Kyongsun Pak
- Division of Biostatistics, Department of Data Management, Center for Clinical Research, National Center for Child Health and Development, Tokyo, Japan
| | - Toru Nakazawa
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan.
- Department of Ophthalmic Imaging and Information Analytics, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan.
- Department of Retinal Disease Control, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan.
- Department of Advanced Ophthalmic Medicine, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan.
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Yamada Y, Kiyota N, Yoshida M, Omodaka K, Nakazawa T. The Relationship Between Kiritsu-Meijin-Derived Autonomic Function Parameters and Visual-Field Defects in Eyes with Open-Angle Glaucoma. Curr Eye Res 2023; 48:1006-1013. [PMID: 37405397 DOI: 10.1080/02713683.2023.2234105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 07/04/2023] [Indexed: 07/06/2023]
Abstract
PURPOSE This retrospective cross-sectional study aimed to investigate the association between autonomic parameters measured using the Kiritsu-Meijin device and visual-field defects in patients with open-angle glaucoma. METHODS A total of 79 eyes of 42 patients with open-angle glaucoma were enrolled in this study. Kiritsu-Meijin testing comprised three phases: sitting, standing, and sitting again (2 min, 2 min, and 1 min, respectively). Continuous electrocardiograms were recorded for five minutes. Autonomic parameters were extracted from the resulting data and analyzed, including activity, balance, reaction, switchover, and recovery; these are five representative parameters derived from Kiritsu-Meijin testing. Correlations between these parameters and mean deviation from Humphrey visual field testing were determined. Additionally, we used a linear mixed-effects model to observe sectoral differences in the relationship between total deviation and the Kiritsu-Meijin parameters. In this study, we focused on superior, central, and inferior total deviations. RESULTS Significant positive correlations were observed between activity, balance, and recovery and mean deviation values (β = 0.29-0.38, p < .05). The β value between activity and inferior total deviation was higher than that between activity and superior total deviation (β = 0.22, p < .05). Balance did not show any sectoral differences (p > .05). Recovery was more strongly associated with central to inferior total deviation than superior total deviation (β = 0.17-0.25, p < .05). CONCLUSION Our findings suggest that in patients with open-angle glaucoma, lower activity and recovery are associated with more severe central and/or inferior visual field defects in the superior quadrant. These results imply that measurements of autonomic function made with the Kiritsu-Meijin device may have clinical utility in the management of glaucoma.
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Affiliation(s)
- Yurina Yamada
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Naoki Kiyota
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Mitsuhide Yoshida
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kazuko Omodaka
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Toru Nakazawa
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, Sendai, Japan
- Department of Ophthalmic Imaging and Information Analytics, Tohoku University Graduate School of Medicine, Sendai, Japan
- Department of Retinal Disease Control, Tohoku University Graduate School of Medicine, Sendai, Japan
- Department of Advanced Ophthalmic Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
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Dorofeev DA, Vitkov AA, Gorobets AV, Eskova MV, Efimova KA, Kanafin EV, Kirilik EV, Lukyanova KO. [Effectiveness and safety of a hypotensive preservative-free drug in long-term therapy of glaucoma]. Vestn Oftalmol 2022; 138:66-72. [PMID: 36288419 DOI: 10.17116/oftalma202213805166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
PURPOSE To investigate the condition of the ocular surface and the effectiveness of Taflotan for long-term therapy in patients with newly diagnosed primary open-angle glaucoma in real clinical practice. MATERIAL AND METHODS This publication presents data form a retrospective observational study that analyzed newly diagnosed glaucoma patients that have been using 1 drop/day of Taflotan in the evening for 12 months. All patients were examined at baseline, and after 1 month and 12 months of treatment, recording intraocular pressure (IOP), retinal photosensitivity indicators (MD, PSD), thickness of the retinal nerve fiber layer (RNFL), and assessing the condition of the ocular surface by Schirmer test, tear breakup time (TBUT), ocular surface disease index (OSDI) questionnaire, as well as measurement of the lacrimal meniscus height and corneal staining with lissamine green. RESULTS IOP effectively decreased in all patients using Taflotan, reaching the target pressure by 1 month after therapy initiation. IOP decreased from 25±4 mm Hg at baseline to 17±3mm Hg after 1 month with further decrease down to 16±3 mm Hg after 12 months of therapy. Retinal photosensitivity (MD and PSD) and RNFL thickness did not differ from baseline, and correlated to glaucoma stage. The indicators of the condition of the ocular surface had no significant differences between the baseline, 1-month and 12-month time points. CONCLUSION Taflotan effectively decreases IOP in newly diagnosed glaucoma patients, maintains stable automated perimetry indices and RNFL thickness, and does not affect the ocular surface throughout 12 months of therapy.
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Affiliation(s)
- D A Dorofeev
- Municipal Clinical Hospital No. 2, Outpatient Department No. 1, Chelyabinsk, Russia
| | - A A Vitkov
- Research Institute of Eye Diseases, Moscow, Russia
| | - A V Gorobets
- Center of Additional Education, Kasli, Russia
- South Ural State University (SRU) - Institute of Natural and Precise Sciences, Chelyabinsk, Russia
| | - M V Eskova
- Municipal Clinical Hospital No. 2, Outpatient Department No. 1, Chelyabinsk, Russia
| | - K A Efimova
- Municipal Clinical Hospital No. 2, Outpatient Department No. 1, Chelyabinsk, Russia
| | - E V Kanafin
- South Ural State University (SRU) - Institute of Natural and Precise Sciences, Chelyabinsk, Russia
| | - E V Kirilik
- Municipal Clinical Hospital No. 2, Outpatient Department No. 1, Chelyabinsk, Russia
| | - K O Lukyanova
- Municipal Clinical Hospital No. 2, Outpatient Department No. 1, Chelyabinsk, Russia
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