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Omoto MK, Torii H, Hayashi K, Ayaki M, Tsubota K, Negishi K. Corrigendum to Ratio of Axial Length to Corneal Radius in Japanese Patients and Accuracy of Intraocular Lens Power Calculation Based on Biometric Data. Am J Ophthalmol 2020;218:320-329. Am J Ophthalmol 2021; 231:210. [PMID: 34470709 DOI: 10.1016/j.ajo.2021.03.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
| | - H Torii
- Department of Ophthalmoloy Keio University School of Medicine, Tokyo, Japan
| | - K Hayashi
- Department of Ophthalmoloy Keio University School of Medicine, Tokyo, Japan; Hayashi Eye Hospital, Fukuoka, Japan
| | - M Ayaki
- Otake Clinic Moon View Eye Center, Kanagawa, Japan
| | - K Tsubota
- Department of Ophthalmoloy Keio University School of Medicine, Tokyo, Japan
| | - K Negishi
- Department of Ophthalmoloy Keio University School of Medicine, Tokyo, Japan.
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Ouchi H, Takamizawa T, Tsubota K, Tsujimoto A, Imai A, Barkmeier WW, Latta MA, Miyazaki M. The Effects of Aluminablasting on Bond Durability Between Universal Adhesives and Tooth Substrate. Oper Dent 2019; 45:196-208. [PMID: 31738692 DOI: 10.2341/18-170-l] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The aim of this study was to determine the effect of aluminablasting on the bond durability of universal adhesives and adherent surface characteristics. Adhese Universal (Ivoclar Vivadent), All-Bond Universal (Bisco), Bondmer Lightless (Tokuyama Dental), G-Premio Bond (GC), and Scotchbond Universal (3M ESPE) were used in self-etch mode. The prepared bovine enamel and dentin specimens were divided into two groups based on whether they received an aluminablasting prior to application of the universal adhesives. The resin composite bonded specimens were stored in distilled water at 37°C for 24 hours, following which the shear bond strength (SBS) of half of the specimens was measured (24-hour group). The other half was subjected to 30,000 thermal cycles between 5 and 55°C before SBS measurement (TC group). Surface roughness (Ra) and surface free energy (SFE) of the adherent surfaces were also measured, and scanning electron microscopy observation and scanning electron microscopy/energy-dispersive X-ray analysis were carried out. Most of the adhesives did not show any significant differences in enamel SBS values between the two pretreatment groups, regardless of the storage condition. However, the dentin SBS values were significantly lower in specimens that underwent aluminablasting compared with those that did not, irrespective of their storage conditions. Significantly higher Ra and SFE values were observed in the enamel and dentin of specimens that underwent aluminablasting. Although aluminablasting increased the Ra and SFE values of enamel and dentin, its effect on the SBS value was dependent on the tooth substrate. In addition to C, O, Na, Mg, P, and Ca, the element Al was detected in the enamel and dentin of samples that had undergone aluminablasting. These results suggest that although aluminablasting of the tooth surface is thought to be effective for modification of the adherent surface, it may not enhance enamel bond performance and may also adversely affect the dentin bond effectiveness of the universal adhesives.
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Kodama Y, Aoki H, Yamagata Y, Tsubota K. In vitro analysis of blood flow in a microvascular network with realistic geometry. J Biomech 2019; 88:88-94. [PMID: 30975487 DOI: 10.1016/j.jbiomech.2019.03.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 02/18/2019] [Accepted: 03/14/2019] [Indexed: 11/29/2022]
Abstract
In vitro blood flow was measured in a polydimethysiloxane micro channel to reflect the complex geometry of a microvascular network. Flow rates were determined from the velocities of tracer particles moving along the center line of the flow channel, and the flow rates of two working fluids were then compared: water and blood. In some bifurcating channels, the measured flow rate showed that the effects of bifurcation in the apparent viscosity depend on the hematocrit, such that the flow rate in the daughter channel with the higher (lower) flow rate was lower (higher) for blood than for water. The measured flow rates in other bifurcating channels reflected effects from the surrounding flow channels acting as bypasses, which tended to balance out the effects of bifurcation.
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Affiliation(s)
- Yuya Kodama
- Graduate School of Engineering, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, Japan; RIKEN Center for Advanced Photonics, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Hiroyoshi Aoki
- RIKEN Center for Advanced Photonics, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yutaka Yamagata
- RIKEN Center for Advanced Photonics, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - K Tsubota
- Graduate School of Engineering, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, Japan; RIKEN Center for Advanced Photonics, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
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Torii H, Negishi K, Tsubota K. Optical reduction of peripheral hyperopic defocus. Acta Ophthalmol 2015. [DOI: 10.1111/j.1755-3768.2015.0121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- H. Torii
- Ophthalmology; Keio University School of Medicine; Tokyo Japan
| | - K. Negishi
- Ophthalmology; Keio University School of Medicine; Tokyo Japan
| | - K. Tsubota
- Ophthalmology; Keio University School of Medicine; Tokyo Japan
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Ozawa Y, Kawashima M, Inoue S, Inagaki E, Suzuki A, Ooe E, Kobayashi S, Tsubota K. Bilberry extract supplementation for preventing eye fatigue in video display terminal workers. J Nutr Health Aging 2015; 19:548-54. [PMID: 25923485 DOI: 10.1007/s12603-014-0573-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
OBJECTIVES To examine the effect of a dietary supplement containing bilberry extract (BE) on eye fatigue induced by acute video display terminal (VDT) loads. DESIGN AND SETTING A prospective, randomized, double-blind, placebo-controlled study was performed from August 2012 to February 2013 in the Medical Corporation Jico-kai Yagi Hospital, and the Shinyokohama Shinoharaguchi Orthopedic Surgery and Dermatology Clinic, in Japan. PARTICIPANTS Two hundred eighty-one office workers aged 20-40 years that used VDTs were screened by critical flicker fusion (CFF) and near point accommodation (NPA). INTERVENTION The participants were randomized to either a BE (480 mg/day) or placebo (vehicle) group, and took allocated capsule, daily, for 8 weeks. MEASUREMENTS The CFF, NPA, contrast visual acuity, functional visual acuity, keratoconjunctival epithelial damage, and fluorescein tear film break-up time were examined, and 18 subjective symptoms of eye fatigue were evaluated by questionnaire. Adverse events were reported via medical interviews. Data were collected both before and after VDT load at baseline, and 4, and 8 weeks after daily supplementation with either BE or placebo. RESULTS Of 281 participants screened, 88 having relatively lower levels of CFF and NPA were enrolled in the study. Of these, 37 control and 43 BE group subjects completed the study. The VDT load-induced reduction in CFF was alleviated after 8 weeks of BE supplementation (95% confidence interval, 0.10-1.60; p=0.023), in contrast to placebo supplementation, while NPA variation was not. Of the subjective symptoms of eye fatigue, VDT load-induced ocular fatigue sensation, ocular pain, eye heaviness, uncomfortable sensation, and foreign body sensation were mitigated more in the BE group than in the control group, at week 8 (p<0.05). There were no severe adverse events in either group. CONCLUSIONS BE supplementation improved some of the objective and subjective parameters of eye fatigue induced by VDT loads.
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Affiliation(s)
- Y Ozawa
- Kazuo Tsubota M.D., Ph.D. Professor and Chairman, Department of Ophthalmology, Keio University School of Medicine; 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan. Phone: +81-3-3353-1211, Fax: +81-3-3359-8302,E-mail:
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Shimizu Y, Tsujimoto A, Furuichi T, Suzuki T, Tsubota K, Miyazaki M, Platt JA. Influence of Light Intensity on Surface Free Energy and Dentin Bond Strength of Core Build-up Resins. Oper Dent 2015; 40:87-95. [DOI: 10.2341/13-283-l] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SUMMARY
Objective
We examined the influence of light intensity on surface free energy characteristics and dentin bond strength of dual-cure direct core build-up resin systems.
Methods
Two commercially available dual-cure direct core build-up resin systems, Clearfil DC Core Automix with Clearfil Bond SE One and UniFil Core EM with Self-Etching Bond, were studied. Bovine mandibular incisors were mounted in acrylic resin and the facial dentin surfaces were wet ground on 600-grit silicon carbide paper. Adhesives were applied to dentin surfaces and cured with light intensities of 0 (no irradiation), 200, 400, and 600 mW/cm2. The surface free energy of the adhesives (five samples per group) was determined by measuring the contact angles of three test liquids placed on the cured adhesives. To determine the strength of the dentin bond, the core build-up resin pastes were condensed into the mold on the adhesive-treated dentin surfaces according to the methods described for the surface free energy measurement. The resin pastes were cured with the same light intensities as those used for the adhesives. Ten specimens per group were stored in water maintained at 37°C for 24 hours, after which they were shear tested at a crosshead speed of 1.0 mm/minute in a universal testing machine. Two-way analysis of variance (ANOVA) and a Tukey-Kramer test were performed, with the significance level set at 0.05.
Results
The surface free energies of the adhesive-treated dentin surfaces decreased with an increase in the light intensity of the curing unit. Two-way ANOVA revealed that the type of core build-up system and the light intensity significantly influence the bond strength, although there was no significant interaction between the two factors. The highest bond strengths were achieved when the resin pastes were cured with the strongest light intensity for all the core build-up systems. When polymerized with a light intensity of 200 mW/cm2 or less, significantly lower bond strengths were observed.
Conclusions
The data suggest that the dentin bond strength of core build-up systems are still affected by the light intensity of the curing unit, which is based on the surface free energy of the adhesives. On the basis of the results and limitations of the test conditions used in this study, it appears that a light intensity of >400 mW/cm2 may be required for achieving the optimal dentin bond strength.
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Affiliation(s)
- Y Shimizu
- Yuske Shimizu, DDS, graduate student, Chiyoda-Ku, Japan
| | - A Tsujimoto
- Akimasa Tsujimoto, DDS, PhD, assistant professor, Operative Dentistry, Nihon University School of Dentistry, Tokyo, Japan
| | - T Furuichi
- Tetsuya Furuichi, DDS, graduate student, Chiyoda-Ku, Japan
| | - T Suzuki
- Takayuki Suzuki, DDS, graduate student, Chiyoda-Ku, Japan
| | - K Tsubota
- Keishi Tsubota, DDS, PhD, assistant professor, Chiyoda-Ku, Japan
| | - M Miyazaki
- Masashi Miyazaki DDS, PhD, professor, Operative Dentistry, Nihon University School of Dentistry, Tokyo, Japan
| | - JA Platt
- Jeffrey A Platt, DDS, MS, associate professor, Restorative Dentistry, Indiana University, Indianapolis, IN, USA
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Abstract
Recent reports have shown that dry eye in Sjögren's syndrome (SS) is associated with reactivation of Epstein-Barr virus (EBV) in lacrimal glands. However, the number of patients examined were few and it has not been determined whether dry eye in the absence of SS is also related to EBV reactivation. The authors examined the serum antibody titers to EBV in three groups of patients: (1) simple dry eye (SDE)-dry eye with no circulating autoantibodies (n = 157), (2) autoimmune positive dry eye (ADE)-dry eye with circulating autoantibodies (n = 68), and (3) Sjögren's syndrome (SS)-dry eye associated with Sjögren's syndrome (n = 62). Healthy volunteers were recruited as controls (n = 47). In SS, the mean antibody titers to EBV nuclear antigen (anti-EBNA), early antigen (anti-EA-IgG), and virus capsid antigen (anti-VCA-IgG) were significantly elevated compared to those of controls. No significant differences in antibody titers were found among ADE, SDE, and the controls. The EBV reactivated pattern was found in 17.7% of SS, which was significantly higher than the 4.4% in ADE, 1.9% in SDE, 0% in controls. These findings suggest an association of EBV with SS, but not ADE or SDE.
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Affiliation(s)
- I Toda
- Department of Ophthalmology, Tokyo Dental College, Chiba, Japan
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Uchino Y, Uchino M, Dogru M, Fukagawa K, Tsubota K. Improvement of accommodation with anti-oxidant supplementation in visual display terminal users. J Nutr Health Aging 2012; 16:478-81. [PMID: 22555795 DOI: 10.1007/s12603-012-0059-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To determine the antioxidant supplementation effect on accommodation among VDT users. DESIGN A double blind randomized placebo controlled study. Registered under ClinicalTrials.gov Identifier No. NCT00877201. PARTICIPANTS AND CONTROLS Fourty right eyes of 40 healthy VDT users (30 females, 10 males, mean age: 43.8±2.8 years, range: 40-49 years). 20 subjects (15 females, 5 males; mean age: 44.0±2.7 years, range: 40-49 years). METHODS Subjects were required to take an antioxidant supplement, 20 age and sex matched subjects (15 females, 5 males; mean age: 43.6±3.1 years, range: 40-49 years) were required to take placebo medication for 4 weeks. RESULTS The mean of the change in accommodation power was significantly higher in the group receiving antioxidant supplements (0.20±0.50 Diopter(D)) compared to the placebo group (-0.12±0.48(D)) (p<0.05). CONCLUSIONS Antioxidant supplementation was observed to improve accommodation in Japanese Visual Display Terminal (VDT) Users.
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Affiliation(s)
- Y Uchino
- Department of Ophthalmology, Keio University school of Medicine, Tokyo, Japan.
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Tatematsu Y, Ogawa Y, Shimmura S, Dogru M, Yaguchi S, Nagai T, Yamazaki K, Kameyama K, Okamoto S, Kawakami Y, Tsubota K. Mucosal microvilli in dry eye patients with chronic GVHD. Bone Marrow Transplant 2011; 47:416-25. [PMID: 21572465 DOI: 10.1038/bmt.2011.89] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The ocular surface is a frequent target tissue of mucosal chronic GVHD (cGVHD). We investigated the histopathological features of the conjunctival microvilli in patients with cGVHD. Conjunctival tissue specimens from patients with cGVHD or Sjögren's syndrome (SS) or from healthy individuals were examined by light microscopy and EM, impression cytology, and immunohistochemistry. The cGVHD conjunctivae showed significantly more metaplasia and fewer goblet cells than the SS and normal conjunctivae. Abundant CD8(+) T cells infiltrated the basal epithelia in the cGVHD conjunctiva. The microvilli per standard epithelial unit and the secretory vesicles were counted by analyzing electron micrographs. The mean number of mucosal microvilli was significantly lower in the cGVHD than that in the SS or normal specimens, and the microvilli were significantly shorter, with a smaller height-width ratio. The mean number of secretory vesicles was also significantly lower, and the membrane-spanning mucin thinner, in the cGVHD compared with the SS and normal specimens. Thus, the conjunctival mucosal microvilli of cGVHD patients were significantly different in number and morphology from those of SS and normal subjects. These may be important factors affecting the stability of the tear-film layer and its contribution to cGVHD-related dry eye.
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Affiliation(s)
- Y Tatematsu
- Department of Ophthalmology, The Keio University School of Medicine, 35 Shinanomachi Shinjuku-ku, Tokyo, Japan
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Yoshida S, Yasuda M, Miyashita M, Tetsu Y, Tsubota K, Okano H, Shimmura S. P82. Differentiation of induced pluripotent stem cells into corneal epithelial cells. Differentiation 2010. [DOI: 10.1016/j.diff.2010.09.088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Yoshida T, Koizumi H, Yuki K, Kubota S, Hirabayashi Y, Suzuki K, Mitani K, Kobayashi T, Ohyama M, Amagai M, Okada Y, Akamatsu W, Tsubota K, Shimmura S, Ozawa Y, Okano H. P75. A gene therapy for a gene mutation in human iPS cell using helper-dependent adenoviral vector. Differentiation 2010. [DOI: 10.1016/j.diff.2010.09.081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Sasaki M, Ozawa Y, Kurihara T, Kubota S, Yuki K, Noda K, Kobayashi S, Ishida S, Tsubota K. Neurodegenerative influence of oxidative stress in the retina of a murine model of diabetes. Diabetologia 2010; 53:971-9. [PMID: 20162412 PMCID: PMC2850533 DOI: 10.1007/s00125-009-1655-6] [Citation(s) in RCA: 203] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2009] [Accepted: 12/14/2009] [Indexed: 12/19/2022]
Abstract
AIMS/HYPOTHESIS Diabetic retinopathy is a progressive neurodegenerative disease, but the underlying mechanism is still obscure. Here, we focused on oxidative stress in the retina, and analysed its influence on retinal neurodegeneration, using an antioxidant, lutein. METHODS C57BL/6 mice with streptozotocin-induced diabetes were constantly fed either a lutein-supplemented diet or a control diet from the onset of diabetes, and their metabolic data were recorded. In 1-month-diabetic mice, reactive oxygen species (ROS) in the retina were measured using dihydroethidium and visual function was evaluated by electroretinograms. Levels of activated extracellular signal-regulated kinase (ERK), synaptophysin and brain-derived neurotrophic factor (BDNF) were also measured by immunoblotting in the retina of 1-month-diabetic mice. In the retinal sections of 4-month-diabetic mice, histological changes, cleaved caspase-3 and TUNEL staining were analysed. RESULTS Lutein did not affect the metabolic status of the diabetic mice, but it prevented ROS generation in the retina and the visual impairment induced by diabetes. ERK activation, the subsequent synaptophysin reduction, and the BDNF depletion in the diabetic retina were all prevented by lutein. Later, in 4-month-diabetic mice, a decrease in the thickness of the inner plexiform and nuclear layers, and ganglion cell number, together with increase in cleaved caspase-3- and TUNEL-positive cells, were avoided in the retina of lutein-fed mice. CONCLUSIONS/INTERPRETATION The results indicated that local oxidative stress that has a neurodegenerative influence in the diabetic retina is prevented by constant intake of a lutein-supplemented diet. The antioxidant, lutein may be a potential therapeutic approach to protect visual function in diabetes.
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Affiliation(s)
- M. Sasaki
- Laboratory of Retinal Cell Biology, Keio University School of Medicine, Tokyo, Japan
- Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582 Japan
| | - Y. Ozawa
- Laboratory of Retinal Cell Biology, Keio University School of Medicine, Tokyo, Japan
- Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582 Japan
| | - T. Kurihara
- Laboratory of Retinal Cell Biology, Keio University School of Medicine, Tokyo, Japan
- Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582 Japan
| | - S. Kubota
- Laboratory of Retinal Cell Biology, Keio University School of Medicine, Tokyo, Japan
- Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582 Japan
| | - K. Yuki
- Laboratory of Retinal Cell Biology, Keio University School of Medicine, Tokyo, Japan
- Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582 Japan
| | - K. Noda
- Laboratory of Retinal Cell Biology, Keio University School of Medicine, Tokyo, Japan
- Department of Ophthalmology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | | | - S. Ishida
- Laboratory of Retinal Cell Biology, Keio University School of Medicine, Tokyo, Japan
- Department of Ophthalmology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - K. Tsubota
- Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582 Japan
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Ibrahim OMA, Takefumi Y, Dogru M, Negishi K, Kosaki K, Tsubota K. Ocular complications in Mulvihill-Smith syndrome. Eye (Lond) 2009; 24:1123-4. [PMID: 19942935 DOI: 10.1038/eye.2009.280] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Abstract
Aim: This study was performed to independently assess the turnover rates of aqueous and lipid layers of the tear film. Methods: Two fluorescent dyes, fluorescein sodium and 5-dodecanoylaminofluorescein (DAF), which is a free-fatty-acid conjugate of fluorescein, were applied to the right eye of 12 healthy volunteers. Fluorescent intensity of the precorneal tear film was measured at the central cornea every minute for 10 min for fluorescein sodium, and every 5 min for 50 min for DAF. The turnover rate was calculated by plotting fluorescent intensity against time in a semilog plot and expressed as %/min. Results: Turnover rates of fluorescein sodium and DAF were 10.3 (SD 3.7)%/min and 0.93 (0.36)%/min, respectively. The turnover rate of DAF was significantly lower than that of fluorescein sodium (p<0.05, Mann–Whitney test). The turnover rate of DAF positively correlated with that of fluorescein sodium (r = 0.93, p<0.05). Conclusion: Our results indicate that the turnover of lipids in tears is much slower than the aqueous flow of tears, and that this lipid turnover is associated with the aqueous flow of tears in healthy adults.
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Affiliation(s)
- H Mochizuki
- Division for Vision Research, National Institute of Sensory Organs, National Tokyo Medical Center, 2-5-1 Higashigaoka, Meguro-ku, Tokyo 152-8902, Japan
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Oto T, Yasuda G, Tsubota K, Kurokawa H, Miyazaki M, Platt JA. Influence of Power Density on Polymerization Behavior and Bond Strengths of Dual-cured Resin Direct Core Foundation Systems. Oper Dent 2009; 34:192-9. [DOI: 10.2341/08-65] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Clinical Relevance
The dentin bond strength and polymerization behavior of the dual-cured core foundation resins tested in this study were affected by the power densities of the curing unit. When using dual-cured core foundation systems, practitioners should consider power densities for getting optimal bond strength.
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Dogru M, Matsumoto Y, Okada N, Igarashi A, Fukagawa K, Shimazaki J, Tsubota K, Fujishima H. Alterations of the ocular surface epithelial MUC16 and goblet cell MUC5AC in patients with atopic keratoconjunctivitis. Allergy 2008; 63:1324-34. [PMID: 18782111 DOI: 10.1111/j.1398-9995.2008.01781.x] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
BACKGROUND An increased understanding of the ocular surface at cellular level in the conjunctiva and the cornea may help explain the pathogenesis and the subsequent clinical appearance of atopic ocular allergies, which may be potentially blinding. PURPOSE To investigate the MUC16 and MUC5AC alterations, tear function and the ocular surface disorder in patients with atopic keratoconjunctivitis (AKC). METHODS Thirty-six eyes of 18 AKC patients as well as 28 eyes of 14 age- and sex-matched normal subjects were studied. The subjects underwent corneal sensitivity measurements, Schirmer test, tear film break-up time (BUT), fluorescein and Rose-Bengal staining of the ocular surface, conjunctival impression cytology and brush cytology. Impression cytology samples underwent periodic acid schiff and immunohistochemical staining with MUC16 and MUC5AC antibodies. Brush cytology specimens underwent evaluation for inflammatory cell numbers and quantitative real-time polymerase chain reaction (PCR) for MUC16 and MUC5AC mRNA expression. RESULTS The mean corneal sensitivity and BUT values were significantly lower in patients with AKC, compared with controls (P < 0.001). Brush cytology specimens from AKC patients revealed significantly higher numbers of inflammatory cells (P < 0.001). Specimens from patient eyes showed positive staining for MUC5AC and MUC16. MUC16 mRNA expression was significantly upregulated with significant downregulation of MUC5AC mRNA expression in eyes with AKC compared with the eyes of control subjects. CONCLUSION Ocular surface inflammation, decline in corneal sensitivity, tear film instability, changes in conjunctival epithelial MUC5AC and MUC16 mRNA expressions were thought to be important in the pathogenesis of atopic ocular surface disease.
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Affiliation(s)
- M Dogru
- Department of Ophthalmology, Tokyo Dental College Ichikawa General Hospital, Ichikawa, Japan
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Yuki K, Shimmura S, Shiba D, Tsubota K. Trabeculotomy for the treatment of glaucoma after Descemet stripping endothelial keratoplasty. Br J Ophthalmol 2008; 92:1299-300. [DOI: 10.1136/bjo.2008.144766] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Masaki Y, Dong L, Kurose N, Kitagawa K, Morikawa Y, Yamamoto M, Takahashi H, Shinomura Y, Imai K, Saeki T, Azumi A, Nakada S, Sugiyama E, Matsui S, Origuchi T, Nishiyama S, Nishimori I, Nojima T, Yamada K, Kawano M, Zen Y, Kaneko M, Miyazaki K, Tsubota K, Eguchi K, Tomoda K, Sawaki T, Kawanami T, Tanaka M, Fukushima T, Sugai S, Umehara H. Proposal for a new clinical entity, IgG4-positive multiorgan lymphoproliferative syndrome: analysis of 64 cases of IgG4-related disorders. Ann Rheum Dis 2008; 68:1310-5. [PMID: 18701557 DOI: 10.1136/ard.2008.089169] [Citation(s) in RCA: 397] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
BACKGROUND Mikulicz's disease (MD) has been considered as one manifestation of Sjögren's syndrome (SS). Recently, it has also been considered as an IgG(4)-related disorder. OBJECTIVE To determine the differences between IgG(4)-related disorders including MD and SS. METHODS A study was undertaken to investigate patients with MD and IgG(4)-related disorders registered in Japan and to set up provisional criteria for the new clinical entity IgG(4)-positive multiorgan lymphoproliferative syndrome (IgG(4)+MOLPS). The preliminary diagnostic criteria include raised serum levels of IgG(4) (>135 mg/dl) and infiltration of IgG(4)(+) plasma cells in the tissue (IgG(4)+/IgG+ plasma cells >50%) with fibrosis or sclerosis. The clinical features, laboratory data and pathologies of 64 patients with IgG(4)+MOLPS and 31 patients with typical SS were compared. RESULTS The incidence of xerostomia, xerophthalmia and arthralgia, rheumatoid factor and antinuclear, antiSS-A/Ro and antiSS-B/La antibodies was significantly lower in patients with IgG(4)+MOLPS than in those with typical SS. Allergic rhinitis and autoimmune pancreatitis were significantly more frequent and total IgG, IgG(2), IgG(4) and IgE levels were significantly increased in IgG(4)+MOLPS. Histological specimens from patients with IgG(4)+MOLPS revealed marked IgG(4)+ plasma cell infiltration. Many patients with IgG(4)+MOLPS had lymphocytic follicle formation, but lymphoepithelial lesions were rare. Few IgG(4)+ cells were seen in the tissue of patients with typical SS. Thirty-eight patients with IgG(4)+MOLPS treated with glucocorticoids showed marked clinical improvement. CONCLUSION Despite similarities in the involved organs, there are considerable clinical and pathological differences between IgG(4)+MOLPS and SS. Based on the clinical features and good response to glucocorticoids, we propose a new clinical entity: IgG(4)+MOLPS.
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Affiliation(s)
- Y Masaki
- Department of Hematology and Immunology, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Kahoku-gun, Ishikawa, 920-0293, Japan.
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Maeda T, Yamaguchi K, Takamizawa T, Rikuta A, Tsubota K, Ando S, Miyazaki M. pH changes of self-etching primers mixed with powdered dentine. J Dent 2008; 36:606-10. [DOI: 10.1016/j.jdent.2008.04.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2008] [Revised: 04/10/2008] [Accepted: 04/14/2008] [Indexed: 11/27/2022] Open
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Matsumoto Y, Dogru M, Goto E, Sasaki Y, Inoue H, Saito I, Shimazaki J, Tsubota K. Erratum: Alterations of the tear film and ocular surface health in chronic smokers. Eye (Lond) 2008. [DOI: 10.1038/eye.2008.153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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22
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Dogru M, Kaido M, Matsumoto Y, Tsubota K. Dry eye disease and its implications on visual function. Arch Soc Esp Oftalmol 2008; 83:3-6. [PMID: 18188787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
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23
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Ikeda M, Tsubota K, Takamizawa T, Yoshida T, Miyazaki M, Platt JA. Bonding Durability of Single-Step Adhesives to Previously Acid-Etched Dentin. Oper Dent 2008; 33:702-9. [DOI: 10.2341/08-26] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Clinical Relevance
To achieve optimum bond strengths, acid etching of dentin prior to the application of single-step self-etch adhesive systems should be avoided.
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Watanabe T, Tsubota K, Takamizawa T, Kurokawa H, Rikuta A, Ando S, Miyazaki M. Effect of Prior Acid Etching on Bonding Durability of Single-Step Adhesives. Oper Dent 2008; 33:426-33. [DOI: 10.2341/07-110] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Clinical Relevance
The ability of acid etching to increase enamel bond strengths varies among single-step self-etch adhesive systems.
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Wang Y, Ogawa Y, Dogru M, Kawai M, Tatematsu Y, Uchino M, Okada N, Igarashi A, Kujira A, Fujishima H, Okamoto S, Shimazaki J, Tsubota K. Ocular surface and tear functions after topical cyclosporine treatment in dry eye patients with chronic graft-versus-host disease. Bone Marrow Transplant 2007; 41:293-302. [DOI: 10.1038/sj.bmt.1705900] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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26
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Hu Y, Matsumoto Y, Dogru M, Okada N, Igarashi A, Fukagawa K, Tsubota K, Fujishima H. The differences of tear function and ocular surface findings in patients with atopic keratoconjunctivitis and vernal keratoconjunctivitis. Allergy 2007; 62:917-25. [PMID: 17620070 DOI: 10.1111/j.1398-9995.2007.01414.x] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND The pathogenesis of the ocular surface disease in atopic keratoconjunctivitis (AKC) and vernal keratoconjunctivitis (VKC) has not been fully understood. We tried to clarify the differences in the ocular surface status in patients with AKC, VKC, and healthy control subjects. METHODS Twenty-four eyes of 12 AKC patients, 12 eyes of six VKC patients, and 20 eyes of 10 normal control subjects were studied. The subjects underwent corneal sensitivity measurements, Schirmer test, tear film break-up time (BUT), vital staining of the ocular surface, conjunctival impression and brush cytology. Impression cytology samples underwent periodic acid Schiff staining for goblet cell density, squamous metaplasia grading, and immunohistochemical staining for MUC1, 2, 4, and 5AC. Brush cytology specimens underwent staining for inflammatory cell counting and Real Time PCR for MUC1, 2, 4, and 5AC mRNA expression. RESULTS The mean BUT, corneal sensitivity, and conjunctival goblet cell density values in AKC patients were significantly lower compared with VKC patients and control subjects. The squamous metaplasia grades in eyes with AKC were significantly higher compared to eyes with VKC and controls. The inflammatory cell response in brush cytology specimens was different between patients with AKC and VKC. Eyes with AKC showed significantly higher MUC1, 2 and 4 and lower MUC5AC mRNA expression compared to eyes with VKC. CONCLUSIONS Differences of the infiltrates, higher level of tear instability, lower corneal sensitivity, up-regulation of MUC1, 2, and 4, and down regulation of MUC5AC were important differential features of the ocular surface disease in AKC compared with VKC.
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Affiliation(s)
- Y Hu
- Department of Ophthalmology, Keio University School of Medicine, Shinanomachi, Tokyo, Japan
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27
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Nishiyama T, Mishima K, Obara K, Inoue H, Doi T, Kondo S, Saka M, Tabunoki Y, Hattori Y, Kodama T, Tsubota K, Saito I. Amelioration of lacrimal gland inflammation by oral administration of K-13182 in Sjögren's syndrome model mice. Clin Exp Immunol 2007; 149:586-95. [PMID: 17614971 PMCID: PMC2219315 DOI: 10.1111/j.1365-2249.2007.03448.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Regulation of the adhesion of mononuclear cells to endothelial cells is considered to be a critical step for the treatment of inflammatory diseases, including autoimmune diseases. K-13182 was identified as a novel inhibitor for these adhesions. K-13182 inhibited the expression of vascular cell adhesion molecule-1 (VCAM-1, CD106) on human umbilical vein endothelial cells (HUVECs) and on mouse vascular endothelial cell line (MAECs) induced by tumour necrosis factor (TNF)-alpha. K-13182 also inhibited the adhesion of mononuclear cells to these HUVECs and MAECs, indicating that K-13182 suppressed these adhesions mediated by cellular adhesion molecules including VCAM-1. To evaluate the therapeutic effect in autoimmune disease model mice, K-13182 was orally administered to non-obese diabetic (NOD) mice as Sjögren's syndrome (SS) model mice. Severe destructive inflammatory lesions were observed in the lacrimal glands of vehicle-treated control mice; however, 8-week administration of K-13182 inhibited the mononuclear cell infiltration into the inflammatory lesions of the lacrimal glands. In K-13182-treated mice, the decrease in tear secretion was also prevented compared to the control mice. In addition, the apoptosis and the expression of FasL (CD178), perforin, and granzyme A was suppressed in the lacrimal glands of K-13182-treated mice. Therefore, K-13182 demonstrated the possibility of therapeutic efficacy for the inflammatory region of autoimmune disease model mice. These data reveal that VCAM-1 is a promising target molecule for the treatment of autoimmune diseases as a therapeutic strategy and that K-13182 has the potential as a new anti-inflammatory drug for SS.
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Affiliation(s)
- T Nishiyama
- Department of Pathology, Tsurumi University School of Dental Medicine, Yokohama, Japan; Sjögren's Syndrome Project, Shinanomachi Research Park, Keio University, Tokyo, Japan
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Dogru M, Okada N, Asano-Kato N, Igarashi A, Fukagawa K, Shimazaki J, Tsubota K, Fujishima H. Alterations of the ocular surface epithelial mucins 1, 2, 4 and the tear functions in patients with atopic keratoconjunctivitis. Clin Exp Allergy 2006; 36:1556-65. [PMID: 17177679 DOI: 10.1111/j.1365-2222.2006.02581.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND An increased understanding of the ocular surface alterations at the cellular level in the conjunctiva and the cornea, may help explain the pathogenesis and the subsequent clinical appearance of atopic ocular allergies, which may be potentially blinding. PURPOSE To investigate MUC 1, 2 and 4 alterations, tear function and the ocular surface disorder in patients with atopic keratoconjunctivitis. METHODS Twenty-eight eyes of 14 atopic keratoconjunctivitis patients as well as 22 eyes of 11 age-and sex-matched normal subjects were studied. The subjects underwent corneal sensitivity measurements, Schirmer's test, tear film break-up time (BUT), fluorescein and Rose Bengal staining of the ocular surface, conjunctival impression cytology and brush cytology. Impression cytology samples underwent periodic acid-Schiff and immunohistochemical staining with MUC 1, 2 and 4 antibodies. Brush cytology specimens underwent evaluation for inflammatory cell numbers and quantitative real-time-PCR for MUC 1, 2 and 4 mRNA expression. Patient eyes with fluorescein and Rose Bengal scores greater than four points were regarded to have significant epithelial disease in this study. RESULTS The mean corneal sensitivity and BUT values were significantly lower in atopic patients with significant epithelial disease, compared with patients with insignificant epithelial disease and controls (P < 0.01). Brush cytology specimens from patients with significant epithelial disease revealed significantly higher numbers of inflammatory cells (P < 0.01). Specimens from patient eyes showed positive staining for MUC 1, 2 and 4. MUC 1, 2 and 4 mRNA expressions were significantly higher in eyes with significant epithelial disease compared with eyes with insignificant epithelial disease and eyes of control subjects. CONCLUSION Ocular surface inflammation, decline in corneal sensitivity, tear film instability, changes in conjunctival epithelial MUC 1, 2 and 4 mRNA expressions were thought to be important in the pathogenesis of atopic ocular surface disease.
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Affiliation(s)
- M Dogru
- Department of Ophthalmology, Tokyo Dental College Ichikawa General Hospital, Ichikawa, Japan.
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Okazaki Y, Matsumoto M, Tsubota K, Nakatsuji S, Fujihira S, Oishi Y. Foregut cyst of the oesophageal wall in a cynomolgus monkey (Macaca fascicularis). J Comp Pathol 2006; 135:259-62. [PMID: 17067619 DOI: 10.1016/j.jcpa.2006.08.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2006] [Accepted: 08/01/2006] [Indexed: 11/17/2022]
Abstract
Congenital oesophageal cysts of foregut origin are rare in animals and human beings. This report describes a case in a 4-year-old cynomolgus monkey with no clinical symptoms. The cyst, which was located within the oesophageal submucosal tissue near the mid-point of the oesophagus, was lined with pseudostratified ciliated epithelium and had a thin layer of submucosal tissue. The cyst was surrounded by a smooth muscle layer which was partly intermingled with the circular muscle layer of the oesophagus. The muscularis mucosae of the oesophagus was not shared with the cyst wall. Simple tubular glands were present, opening into the cyst lumen. No communication between the cyst lumen and the oesophagus was observed. Cartilaginous tissue, which is a diagnostic feature of bronchogenic cysts, was not identified in the cyst wall. On the basis of the histopathological features, a foregut cyst of the oesophagus was diagnosed.
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Affiliation(s)
- Y Okazaki
- Department of Toxicologic Pathology, Drug Safety Research Laboratories, Astellas Pharma Inc., Kashima 2-1-6, Yodogawa, Osaka 532-8514, Japan.
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Tanaka M, Dogru M, Takano Y, Miyake-Kashima M, Asano-Kato N, Fukagawa K, Tsubota K, Fujishima H. Quantitative evaluation of the early changes in ocular surface inflammation following MMC-aided papillary resection in severe allergic patients with corneal complications. Am J Ophthalmol 2006. [DOI: 10.1016/j.ajo.2006.06.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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31
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Toda I, Kato-Asano N, Hori-Komai Y, Tsubota K. Dry eye after LASIK enhancement by flap lifting. Am J Ophthalmol 2006. [DOI: 10.1016/j.ajo.2006.06.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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32
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Shimmura S, Miyashita H, Uchino Y, Taguchi T, Kobayashi H, Shimazaki J, Tanaka J, Tsubota K. Microkeratome assisted deep lamellar keratoprosthesis. Br J Ophthalmol 2006; 90:826-9. [PMID: 16597665 PMCID: PMC1857140 DOI: 10.1136/bjo.2006.090324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
AIMS To establish a keratoprosthesis (Kpro) surgical technique that maintains an intact superficial corneal layer. METHODS A manual microkeratome (Moria LSK-1) was used to create a 130 mum flap of approximately 10 mm diameter in the right eye of Japanese white rabbits. The stoma beneath the flap area was dissected before the removal of a 5.0 mm stromal disc. A 5.0 mm collagen I immobilised poly(vinyl alcohol) (COL-PVA) disc was placed on the exposed posterior stroma close to Descemet's membrane. The flap was repositioned and fixed using 10-0 nylon sutures, which were removed 2 days following surgery. The corneas were followed clinically by slit lamp microscopy and photographs. Rabbits were sacrificed after 6 months, and the transplanted corneas were examined histologically by haematoxylin and eosin staining and immunohistochemistry against vimentin and alpha-smooth muscle actin (alpha-SMA). RESULTS The transplanted COL-PVA discs remained transparent throughout the study, with no complications related to the flap or overlying epithelium. The interface between COL-PVA and Descemet's membrane remained clear without signs of opacification caused by scarring or cellular deposition. Pathology revealed the intact COL-PVA polymer in the posterior stroma, with minimal cellular infiltration along the anterior and posterior interfaces. Immunohistology shows vimentin and alpha-SMA staining at levels comparable to lamellar keratoplasty control. CONCLUSIONS Microkeratome assisted deep lamellar keratoprosthesis may be a safe technique for the transplantation of artificial hydrogels for therapeutic purposes.
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Affiliation(s)
- S Shimmura
- Department of Ophthalmology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan.
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Higuchi A, Shimmura S, Takeuchi T, Suematsu M, Tsubota K. Elucidation of apoptosis induced by serum deprivation in cultured conjunctival epithelial cells. Br J Ophthalmol 2006; 90:760-4. [PMID: 16531423 PMCID: PMC1860219 DOI: 10.1136/bjo.2005.088203] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND/AIMS The conjunctival epithelial cell line, CCL20.2 (CCL), requires the presence of 10% fetal calf serum (FCS) in the medium to survive. To elucidate the molecular mechanism underlying such cell death, including the death signal for these cells, the activities of several caspases in the CCL were measured, and the effects of caspase inhibitors and serum components on cell death were examined. METHODS CCL was grown in Medium 199 containing 10% FCS, and the medium was changed to Medium 199 with or without 10% FCS, or medium without 10% FCS but containing caspase inhibitors or serum components. After 24 hours' incubation, the enzyme activities of caspases 1, 3, 8, and 9 in the culture supernatants were measured, and the effects of caspase inhibitors and serum components-for example, growth factors, lactoferrin, retinoic acid, were investigated. RESULTS DNA fragmentation was induced by serum deprivation, confirming that serum deprivation induces apoptosis in CCL. While the activities of caspases 3 and 8 were found to be increased, those of caspases 1 and 9 were not detected in the apoptotic cells. Z-VAD completely suppressed the caspase 3 activation, and specific inhibitors of caspases 1, 8, and 9 partially suppressed the activation. Serum deprivation induced a decrease in the cellular viability, which, however, partially recovered in the presence of caspase inhibitors, epidermal growth factor and retinoic acid. CONCLUSION These results suggest that the apoptosis induced by serum deprivation involves caspases 1, 3, 8, and 9, and is suppressed by caspase inhibitors. EGF and retinoic acid have a key role in the maintenance of the ocular surface.
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Affiliation(s)
- A Higuchi
- PhD, 6N9 Research Park, Keio University, School of Medicine, 35 Shinano-Machi, Shinjyuku-Ku, Tokyo, 160-8582 Japan.
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Fukui T, Parker K, Tsubota K, Wada S, Yamaguchi T. The effect of wall motion on arterial wall shear stress. J Biomech 2006. [DOI: 10.1016/s0021-9290(06)84819-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Nagasao T, Nakajima T, Shimazaki J, Akabane N, Tsubota K. Preliminary repair of eyelids for the treatment of opaque corneas caused by burns. ACTA ACUST UNITED AC 2005; 39:227-33. [PMID: 16208786 DOI: 10.1080/02844310510006321] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The treatment of opaque cornea as a result of a burn is challenging, because the cornea often re-opacifies even after transplantation. One of the main risk factors is the deformity of the eyelids, and we have developed a new treatment for this. Preliminary repair of the lower eyelid is done by an auricular composite graft before transplantation, so that the grafted materials can be safely protected by the eyelids. The results of treatment since have greatly improved. Preliminary repair of the eyelid is an effective way to secure successful transplantation.
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Affiliation(s)
- T Nagasao
- Department of Plastic and Reconstructive Surgery, School of Medicine, Keio University, Tokyo, Japan.
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Abstract
BACKGROUND/AIM Recent studies have demonstrated that tear lipocalin (TL) and phospholipids have a crucial role in maintaining tear film stability. The level of TL in patients with meibomian gland dysfunction (MGD) was examined and these data were correlated with the severity of their clinical disorder. METHODS 12 patients with obstructive MGD, 12 patients with seborrhoeic MGD, and 12 age matched normal control subjects participated in this study. 3 mul of unstimulated tears were collected with a micropipette from the inferior tear meniscus in the right eye of all subjects. Tear samples were fractionated by high performance liquid chromatography, and TL concentrations were assayed with a bicinchoninic acid technique. RESULTS The mean concentration of TL in patients with obstructive and seborrhoeic MGD was significantly lower than in normal controls. TL concentration correlated positively with tear film break up time and negatively with fluorescein staining scores. CONCLUSION These results suggest that TL deficiency may be a predisposing factor for the manifestation of symptoms in MGD.
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Affiliation(s)
- M Yamada
- Department of Ophthalmology, Keigo University School of Medicine, Tokyo, Japan.
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Mizuno F, Hayasaka T, Tsubota K, Wada S, Yamaguchi T. Development of a wearable computer system with a hands-free operation interface for the use of home health caregiver. Technol Health Care 2005. [DOI: 10.3233/thc-2005-13408] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- F. Mizuno
- Department of Bioengineering and Robotics, Graduate School of Engineering, Tohoku University, Sendai, Japan
| | | | - K. Tsubota
- Department of Bioengineering and Robotics, Graduate School of Engineering, Tohoku University, Sendai, Japan
| | - S. Wada
- Department of Bioengineering and Robotics, Graduate School of Engineering, Tohoku University, Sendai, Japan
| | - T. Yamaguchi
- Department of Bioengineering and Robotics, Graduate School of Engineering, Tohoku University, Sendai, Japan
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Shimmura S, Miyashita H, Konomi K, Shinozaki N, Taguchi T, Kobayashi H, Shimazaki J, Tanaka J, Tsubota K. Transplantation of corneal endothelium with Descemet's membrane using a hyroxyethyl methacrylate polymer as a carrier. Br J Ophthalmol 2005; 89:134-7. [PMID: 15665339 PMCID: PMC1772492 DOI: 10.1136/bjo.2004.050591] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
AIMS To evaluate the histology and function of Descemet's membrane transplanted with intact endothelium. METHODS Japanese white rabbits and human eyebank eyes were used as donors and recipients of Descemet's membrane transplantation. Donor endothelium was hydrodissected by injecting indocyanine green from a limbal incision, and then processed as a corneal scleral button. A 6 mm diameter donor sheet was trephined, and folded in half using a 6 mm diameter polymer as a carrier. Recipient endothelium was also hydrodissected from the limbus using trypan blue to stain the Descemet's membrane. Continuous curvilinear descemetorhexis (CCD) was performed to remove a circular section of the Descemet's membrane using a 27 gauge cystotome. Donor tissue was inserted into the anterior chamber through a 5 mm limbal incision and apposed to the host stroma. Polymers were removed following transplantation. Similar surgical procedures were performed in both rabbits and eyebank eyes. Haematoxylin eosin stains were performed after 28 days in rabbits, and eyebank eyes were fixed immediately following surgery for endothelial cell counts. RESULTS Rabbit control eyes demonstrated stromal oedema caused by loss of Descemet's membrane, whereas transplanted eyes had clear corneas. The mean (standard deviation) pachymetry of operated eyes was 376.6 (SD 32.5) mum compared with 389.6 (SD 25.1) mum in the unoperated eye. Mean endothelial density immediately following surgery in eyebank eyes was 2749 (SD 288) cells/mm(2). CONCLUSIONS Transplantation of Descemet's membrane by CCD produces a functional graft with an optically clear interface similar to control cornea.
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Affiliation(s)
- S Shimmura
- Department of Opthalmology, Toyko Dental College, 5-11-13 Sugano, Ichikiawa, Chiba 272-8513, Japan.
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Mizuno F, Hayasaka T, Tsubota K, Wada S, Yamaguchi T. Development of a wearable computer system with a hands-free operation interface for the use of home health caregiver. Technol Health Care 2005; 13:293-300. [PMID: 16055977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
We previously developed a network-based medical care support system called the Hyper Hospital, a computer network with an interface that is dedicated to patient care. In this study, we developed a wearable information system that is designed so that a caregiver can obtain information and control various support devices within the home-care environment. In our system, the wearable computer itself consists of a computer network built into a jacket. Each required function is implemented by a dedicated small computer connected to the in-jacket network. A new function may easily be added to the system by connecting additional computers. A network comprising such a set of single-function computers becomes a highly efficient information system when applied to health care support.
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Affiliation(s)
- F Mizuno
- Department of Bioengineering and Robotics, Graduate School of Engineering, Tohoku University, Sendai, Japan
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Sasaki Y, Ohashi Y, Ishida N, Takeuchi T, Tsusaka K, Yasui M, Tsubota K. Prolactin-Induced Protein Regulates the Trafficking of Aquaporin 5 into Apical Membrane of Mouse Lacrimal Gland. Ocul Surf 2005. [DOI: 10.1016/s1542-0124(12)70547-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Takano Y, Fukagawa K, Dogru M, Asano-Kato N, Tsubota K, Fujishima H. Inflammatory cells in brush cytology samples correlate with the severity of corneal lesions in atopic keratoconjunctivitis. Br J Ophthalmol 2004; 88:1504-5. [PMID: 15548799 PMCID: PMC1772414 DOI: 10.1136/bjo.2004.047167] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND Inflammatory cells infiltrating to the tarsal conjunctiva are thought to be involved in the pathogenesis of corneal lesions in severe allergic conjunctival diseases. The relation between such cells and the severity of corneal lesions was studied. METHODS Six patients with atopic keratoconjunctivitis (AKC) were enrolled in this study. Tarsal brush cytology findings and the severity of corneal damage at that point were recorded and analysed for correlation. RESULTS Four out of six patients exhibited correlation between eosinophils and corneal damage. Three out of six patients exhibited correlation between neutrophils and corneal damage. Two out of six patients exhibited correlation between both eosinophils and neutrophils and corneal damage. Analysis of all data from all patients taken together revealed that both eosinophils and neutrophils in brush cytology samples significantly correlated with corneal damage. CONCLUSIONS Inflammatory cells in brush cytology samples correlated with corneal damage. Evaluation of the relative percentages of inflammatory cells in brush cytology samples is a useful method of assessing disease activity in allergic conjunctival disease.
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Affiliation(s)
- Y Takano
- Department of Ophthalmology, Kawasaki Municipal Hospital, 12-1 Shinkawa-dori, Kawasaki-ku, Kawasaki-shi, Kanagawa, Japan 210-0013.
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Abstract
AIMS To evaluate the effectiveness of core vitrectomy preceding triple corneal procedure (penetrating keratoplasty, extracapsular cataract extraction, and intraocular lens (IOL) implantation). METHODS Thirty one consecutive eyes of 31 patients with indication for triple corneal procedure were randomly assigned to either triple procedure with core vitrectomy (vitrectomy group) or without vitrectomy (control group). The success rate of IOL implantation, IOL positioning, intraoperative and postoperative complications, endothelial cell loss, and best corrected visual acuity (BCVA) were compared. Follow up period was six months. Factors that may contribute to vitreous pressure elevation were also investigated in each case. RESULTS There was no statistically significant difference in each clinical parameter examined except a tendency of facilitating IOL implantation (p = 0.11). There were two cases of vitreous loss in the control group. Retinal detachment was not seen in any of the cases. The body mass index and age were related to higher vitreous pressure (p<0.05). CONCLUSION Core vitrectomy preceding triple corneal procedure is not necessary for all cases.
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Affiliation(s)
- K Konomi
- Department of Ophthalmology, Tokyo Dental College, Ichikawa General Hospital, Sugano 5-11-13, Ichikawa City, Chiba 272-8513, Japan.
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Noda-Tsuruya T, Toda I, Asano-Kato N, Hori-Komai Y, Fukumoto T, Tsubota K. Risk factors for development of diffuse lamellar keratitis after laser in situ keratomileusis. Am J Ophthalmol 2004. [DOI: 10.1016/j.ajo.2004.05.049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Abstract
OBJECTIVES The aim of this study was to investigate oral symptoms and clinical parameters in dry eye patients. Subjective reports of the sensation of a dry mouth, salivary flow rates, and clinical parameters of oral disease related to three different types of dry eye patients were examined. SUBJECTS AND METHODS There were 224 individuals, including dry eye patients and control subjects. The dry eye patients were classified into three types: patients with Sjögren's syndrome (SS-DE), patients without SS-DE (non-SS-DE), and patients with Stevens-Johnson syndrome (SJS-DE). Salivary flow rates were measured using two kinds of sialometry. Subjective and objective oral symptoms and signs were also examined. RESULTS AND CONCLUSION Over half of the dry eye patients complained of a dry mouth. The flow rates of their stimulated whole saliva and parotid saliva were significantly lower than those of the control groups (P < 0.05, P < 0.01). The sensation of a dry mouth and changes in oral soft tissues, dental caries, and oral Candida frequently occurred in dry eye patients.
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Affiliation(s)
- M Koseki
- Department of Epidemiology and Public Health, Tokyo Dental College, Chiba, Japan.
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Abstract
AIM To determine the efficacy of using albumin tear supplements in the treatment of ocular surface disorders as a substitute for serum eye drops. METHODS The effects of albumin on the viability of serum deprived conjunctival cell were observed in vitro. The ability for albumin to compensate for serum was demonstrated by measuring the activity of the apoptosis related enzyme, caspase-3. In an animal study, corneal erosions were inflicted in 40 Japanese white rabbits. Rabbits were treated with 5% or 10% solutions of human albumin, and the decrease in epithelial defect size was compared with saline control and 0.3% sodium hyaluronate. A clinical case series trial of 5% albumin drops was conducted in nine patients with Sjögren's syndrome with severe dry eye. RESULTS The addition of albumin to serum deprived conjunctival cells inhibited caspase activity and increased cell viability, showing that albumin can compensate for some of the physiological properties of serum. Corneal erosions in rabbits healed significantly faster (p<0.05) in eyes treated with 10% albumin compared with control and sodium hyaluronate. Patients with Sjögren's syndrome used albumin drops showed statistically significant improvement in fluorescein and rose bengal scores, but not in tear break up time and subjective symptoms. No adverse effects of albumin were observed during the study. CONCLUSIONS The use of albumin as a protein supplement in artificial tear solutions is a viable approach in the treatment of ocular surface disorders associated with tear deficiency.
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Affiliation(s)
- S Shimmura
- Department of Ophthalmology, Tokyo Dental College, 5-11-13 Sugano, Ichikawa, Chiba 272-0824, Japan.
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Ogawa Y, Kuwana M, Yamazaki K, Mashima Y, Okamoto S, Tsubota K, Oguchi Y, Kawakami Y. Dry eye associated with chronic graft-versus-host disease. Adv Exp Med Biol 2003; 506:1041-5. [PMID: 12614029 DOI: 10.1007/978-1-4615-0717-8_147] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Affiliation(s)
- Y Ogawa
- Department of Ophthalmology, Institute for Advanced Medical Research, Keio University School of Medicine, Tokyo, Japan
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Nepp J, Tsubota K, Goto E, Schauersberger J, Schild G, Jandrasits K, Abela C, Wedrich A. The effect of acupuncture on the temperature of the ocular surface in conjunctivitis sicca measured by non-contact thermography: preliminary results. Adv Exp Med Biol 2003; 506:723-6. [PMID: 12613984 DOI: 10.1007/978-1-4615-0717-8_102] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Johannes Nepp
- Department of Ophthalmology, University of Vienna Medical School, Vienna, Austria
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Ogawa Y, Okamoto S, Mori T, Yamada M, Mashima Y, Watanabe R, Kuwana M, Tsubota K, Ikeda Y, Oguchi Y. Autologous serum eye drops for the treatment of severe dry eye in patients with chronic graft-versus-host disease. Bone Marrow Transplant 2003; 31:579-83. [PMID: 12692625 DOI: 10.1038/sj.bmt.1703862] [Citation(s) in RCA: 191] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
We investigated the efficacy and safety of autologous serum eye drops for the treatment of severe dry eye after allogeneic haematopoietic stem cell transplantation (SCT). A total of 14 patients (four males and 10 females; median age, 31.0 years) with severe dry eye associated with chronic graft-versus-host disease (cGVHD) were enrolled in this study. All patients were refractory to treatment with conventional artificial tears. Autologous serum eye drops, a solution made of 20% autologous serum in sterile saline, were applied 10 times per eye per day. The patients were evaluated every 4 weeks according to visual acuity, corneal sensitivity, vital staining of the ocular surface, tear dynamics, and subjective assessments of symptoms (complaints scores). The median follow-up period was 19.4 months (range: 4-41 months). After 4 weeks of treatment, significant improvement was observed in both complaint scores (from 33.7+/-12.3 to 23.6+/-10.6 points; P<0.01) and fluorescein scores (from 5.8+/-2.0 to 2.4+/-0.9 points; P<0.005). Significant improvements were observed also in rose-bengal staining and tear break-up time. In seven of the 14 patients, the responses were maintained for 6-41 months (median:19.4+/-8.3 months), while six of the other seven patients required treatment with punctal plugs in addition to autologous serum eye drops. One of these other seven patients developed eczema around the eyelids, after which the treatment was discontinued. No serious adverse events were observed. We conclude that autologous serum eye drops are safe and effective for treating severe dry eye associated with cGVHD and that more efficient control of dry eye may be achieved by the combined use of autologous serum eye drops with punctal plugs.
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Affiliation(s)
- Y Ogawa
- Department of Ophthalmology, School of Medicine, Keio University, Tokyo, Japan
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Asano-Kato N, Fukagawa K, Takano Y, Kawakita T, Tsubota K, Fujishima H, Takahashi S. Treatment of atopic blepharitis by controlling eyelid skin water retention ability with ceramide gel application. Br J Ophthalmol 2003; 87:362-3. [PMID: 12598457 PMCID: PMC1771555 DOI: 10.1136/bjo.87.3.362] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Mori D, Tsubota K, Wada S, Yamaguchi T. 3P-0666 Three dimensional configuration of the aorta determines its susceptibility to aneurysm through concentrated wall shear distribution pattern. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)90886-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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