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Article ; Online: Has isolated check VEP finally come out of its infancy?

Tzekov, Radouil / Odom, J Vernon

Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie

2023 Volume 261, Issue 7, Page(s) 1809–1810

MeSH term(s)	Humans ; Evoked Potentials, Visual
Language	English
Publishing date	2023-03-01
Publishing country	Germany
Document type	Editorial
ZDB-ID	8435-9
ISSN	1435-702X ; 0721-832X
ISSN (online)	1435-702X
ISSN	0721-832X
DOI	10.1007/s00417-023-05978-6
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Article ; Online: Internal limiting membrane peeling in rhegmatogenous retinal detachment: A meta-analysis.

Chen, Guohai / Tzekov, Radouil / Fang, Yan / Tong, Yuhua / Li, Wensheng

PloS one

2024 Volume 19, Issue 3, Page(s) e0297230

Abstract: Purpose: To determine whether pars plana vitrectomy (PPV) with internal limiting membrane (ILM) peeling for rhegmatogenous retinal detachment (RRD) could get better functional and anatomical outcomes.: Methods: A comprehensive literature search was ... ...

Abstract	Purpose: To determine whether pars plana vitrectomy (PPV) with internal limiting membrane (ILM) peeling for rhegmatogenous retinal detachment (RRD) could get better functional and anatomical outcomes. Methods: A comprehensive literature search was performed to find relevant studies. A meta-analysis was conducted by comparing the weighted mean differences (WMD) in the mean change of best corrected visual acuity (BCVA) from baseline and calculating the odd ratios (OR) for rates of epiretinal membrane (ERM) formation and recurrence of retinal detachment (RD). Results: Fourteen studies were selected, including 2259 eyes (825 eyes in the ILM peeling group and 1434 eyes in the non-ILM peeling group). There was no significant difference in terms of mean change in BCVA from baseline and the rate of RD recurrence (WMD = 0.02, 95% CI, -0.20 to 0.24, P = 0.86, and OR = 0.55, 95% CI, 0.24 to 1.26, P = 0.16), but ILM peeling was associated with a significantly lower frequency of postoperative ERM formation (OR = 0.13, 95% CI, 0.06 to 0.26, P<0.00001). Similar results were obtained in a sub-analysis based on macula-off RRD. Conclusion: ILM peeling results in similar BCVA, with same rate of RD recurrence, but lower rate of postoperative ERM development. ILM peeling could be considered in selected cases with risk factors that are likely to develop an ERM.
MeSH term(s)	Humans ; Retinal Detachment/etiology ; Retina ; Epiretinal Membrane/etiology ; Macula Lutea ; Basement Membrane/surgery ; Vitrectomy/methods ; Skin Abnormalities ; Retrospective Studies ; Tomography, Optical Coherence
Language	English
Publishing date	2024-03-15
Publishing country	United States
Document type	Meta-Analysis ; Journal Article
ZDB-ID	2267670-3
ISSN	1932-6203 ; 1932-6203
ISSN (online)	1932-6203
ISSN	1932-6203
DOI	10.1371/journal.pone.0297230
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Article ; Online: Pre-stimulus bioelectrical activity in lightadapted ERG under blue versus white background - CORRIGENDUM.

Tsay, Katherine / Safari, Sara / Abou-Samra, Abdullah / Kremers, Jan / Tzekov, Radouil

Visual neuroscience

2024 Volume 41, Page(s) E001

Language	English
Publishing date	2024-01-05
Publishing country	England
Document type	Journal Article
ZDB-ID	639436-x
ISSN	1469-8714 ; 0952-5238
ISSN (online)	1469-8714
ISSN	0952-5238
DOI	10.1017/S0952523823000044
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Article ; Online: Full-field ERG in diabetic retinopathy: a screening tool?

Tzekov, Radouil

Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie

2015 Volume 253, Issue 7, Page(s) 987–988

MeSH term(s)	Diabetes Mellitus, Type 1/complications ; Diabetic Retinopathy/classification ; Diabetic Retinopathy/diagnosis ; Electroretinography ; Female ; Humans ; Male ; Retina/pathology ; Tomography, Optical Coherence
Language	English
Publishing date	2015-07
Publishing country	Germany
Document type	Comment ; Editorial
ZDB-ID	8435-9
ISSN	1435-702X ; 0721-832X
ISSN (online)	1435-702X
ISSN	0721-832X
DOI	10.1007/s00417-015-3037-8
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Article: Hydrogen peroxide-induced oxidative damage and protective role of peroxiredoxin 6 protein via EGFR/ERK signaling pathway in RPE cells.

Chen, Xiaodong / Tzekov, Radouil / Su, Mingyang / Zhu, Yusheng / Han, Aidong / Li, Wensheng

Frontiers in aging neuroscience

2023 Volume 15, Page(s) 1169211

Abstract: Introduction: Damage to retinal pigment epithelium (RPE) cells caused by oxidative stress is closely related to the pathogenesis of several blinding retinal diseases, such as age-related macular degeneration (AMD), retinitis pigmentosa, and other ... ...

Abstract	Introduction: Damage to retinal pigment epithelium (RPE) cells caused by oxidative stress is closely related to the pathogenesis of several blinding retinal diseases, such as age-related macular degeneration (AMD), retinitis pigmentosa, and other inherited retinal degenerative conditions. However, the mechanisms of this process are poorly understood. Hence, the goal of this study was to investigate hydrogen peroxide (H Methods: Cells from a human RPE cell line (ARPE-19 cells) were treated with H Results: Our results show that H Discussion: Our findings indicate that PRDX6 overexpression protects RPE cells from oxidative stress damage caused by decreasing ROS production and partially blocking the inhibition of the EGFR/ERK signaling pathway induced by oxidative stress. Therefore, PRDX6 shows promise as a therapeutic target for the prevention of RPE cell damage caused by oxidative stress associated with retinal diseases.
Language	English
Publishing date	2023-07-17
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2558898-9
ISSN	1663-4365
ISSN	1663-4365
DOI	10.3389/fnagi.2023.1169211
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Article ; Online: Pre-stimulus bioelectrical activity in light-adapted ERG under blue versus white background.

Tsay, Katherine / Safari, Sara / Abu-Samra, Abdullah / Kremers, Jan / Tzekov, Radouil

Visual neuroscience

2023 Volume 40, Page(s) E004

Abstract: To compare the baseline signal between two conditions used to generate the photopic negative response (PhNR) of the full-field electroretinogram (ERG): red flash on a blue background (RoB) and white flash on a white background (LA3). The secondary ... ...

Abstract	To compare the baseline signal between two conditions used to generate the photopic negative response (PhNR) of the full-field electroretinogram (ERG): red flash on a blue background (RoB) and white flash on a white background (LA3). The secondary purpose is to identify how the level of pre-stimulus signal affects obtaining an unambiguous PhNR component. A retrospective chart review was conducted on four cohorts of patients undergoing routine ERG testing. In each group, LA3 was recorded the same way while RoB was generated differently using various luminances of red and blue light. The background bioelectrical activity 30 ms before the flash was extracted, and the root mean square (RMS) of the signal was calculated and compared between RoB and LA3 using Wilcoxon test. Pre-stimulus noise was significantly higher under RoB stimulation versus LA3 in all four conditions for both right and left eyes (ratio RoB/LA3 RMS 1.70 and 1.57 respectively,
MeSH term(s)	Humans ; Retina/physiology ; Retrospective Studies ; Photic Stimulation/methods ; Electroretinography ; Color Vision
Language	English
Publishing date	2023-12-13
Publishing country	England
Document type	Journal Article
ZDB-ID	639436-x
ISSN	1469-8714 ; 0952-5238
ISSN (online)	1469-8714
ISSN	0952-5238
DOI	10.1017/S0952523823000032
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Article ; Online: Natural protection of ocular surface from viral infections - A hypothesis.

Zimmerman, Keith / Kearns, Fiona / Tzekov, Radouil

Medical hypotheses

2020 Volume 143, Page(s) 110082

Abstract: A pandemic outbreak of a viral respiratory infection (COVID-19) caused by a coronavirus (SARS-CoV-2) prompted a multitude of research focused on various aspects of this disease. One of the interesting aspects of the clinical manifestation of the ... ...

Abstract	A pandemic outbreak of a viral respiratory infection (COVID-19) caused by a coronavirus (SARS-CoV-2) prompted a multitude of research focused on various aspects of this disease. One of the interesting aspects of the clinical manifestation of the infection is an accompanying ocular surface viral infection, viral conjunctivitis. Although occasional reports of viral conjunctivitis caused by this and the related SARS-CoV virus (causing the SARS outbreak in the early 2000s) are available, the prevalence of this complication among infected people appears low (~1%). This is surprising, considering the recent discovery of the presence of viral receptors (ACE2 and TMPRSS2) in ocular surface tissue. The discrepancy between the theoretically expected high rate of concurrence of viral ocular surface inflammation and the observed relatively low occurrence can be explained by several factors. In this work, we discuss the significance of natural protective factors related to anatomical and physiological properties of the eyes and preventing the deposition of large number of virus-loaded particles on the ocular surface. Specifically, we advance the hypothesis that the standing potential of the eye plays an important role in repelling aerosol particles (microdroplets) from the surface of the eye and discuss factors associated with this hypothesis, possible ways to test it and its implications in terms of prevention of ocular infections.
MeSH term(s)	Aerosols ; Air Microbiology ; Betacoronavirus/pathogenicity ; COVID-19 ; Conjunctivitis, Viral/prevention & control ; Conjunctivitis, Viral/virology ; Coronavirus Infections/prevention & control ; Coronavirus Infections/transmission ; Coronavirus Infections/virology ; Eye/virology ; Humans ; Membrane Potentials ; Models, Biological ; Ocular Physiological Phenomena ; Pandemics/prevention & control ; Particle Size ; Pneumonia, Viral/prevention & control ; Pneumonia, Viral/transmission ; Pneumonia, Viral/virology ; SARS-CoV-2 ; Static Electricity
Chemical Substances	Aerosols
Keywords	covid19
Language	English
Publishing date	2020-07-09
Publishing country	United States
Document type	Journal Article
ZDB-ID	193145-3
ISSN	1532-2777 ; 0306-9877
ISSN (online)	1532-2777
ISSN	0306-9877
DOI	10.1016/j.mehy.2020.110082
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Zs.A 1132: Show issues

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Article ; Online: Volumetric histological characterization of optic nerve degeneration using tissue clearing: literature review and practical study.

Myers, April / Ford, Jonathan / Decker, Summer / Crawford, Fiona / Tzekov, Radouil

Journal of histotechnology

2021 Volume 44, Issue 4, Page(s) 206–216

Abstract: Tissue clearing technologies can greatly improve the depth and accuracy with which the three-dimensional structure of tissues, especially those of th*-e nervous system, can be visualized. A review of the present literature suggests that the growing ... ...

Abstract	Tissue clearing technologies can greatly improve the depth and accuracy with which the three-dimensional structure of tissues, especially those of th*-e nervous system, can be visualized. A review of the present literature suggests that the growing diversity and sophistication of various approaches have contributed to the expansion of this method to a greater variety of tissue types, experimental conditions, and imaging modalities. In the proof-of-concept study presented in this paper, a simplified and modified version of the tissue clearing method CUBIC (clear, unobstructed brain imaging cocktails and computational analysis) was used in conjunction with fluorescent staining and immunohistochemistry to illustrate the three-dimensional structure and molecular characteristics of inflammatory and degenerative activity in the mouse optic nerve. Based on the studies summarized in this mini-review, and our impression from using the mCUBIC method, it appears that tissue clearing could be a viable approach revealing three-dimensional histological features of myelin-rich tissues under normal conditions and after injury.
MeSH term(s)	Animals ; Brain ; Imaging, Three-Dimensional/methods ; Immunohistochemistry ; Mice ; Nerve Degeneration ; Staining and Labeling
Language	English
Publishing date	2021-06-16
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S. ; Review
ZDB-ID	604634-4
ISSN	2046-0236 ; 0147-8885
ISSN (online)	2046-0236
ISSN	0147-8885
DOI	10.1080/01478885.2021.1938808
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Article ; Online: Electroretinographic Findings in Melanoma-Associated Retinopathy Treated by Intravitreal Dexamethasone Implant.

Abou-Samra, Abdullah / Tzekov, Radouil / Yannuzzi, Nicolas A / Tarabishy, Ahmad B

Ophthalmic surgery, lasers & imaging retina

2021 Volume 52, Issue 8, Page(s) 454–456

Abstract: A 63-year-old male with a history of bladder cancer in remission presented with progressive vision loss during a period of 2 years. Slit-lamp and funduscopic examination were unremarkable. Electroretinogram (ERG) revealed an unrecordable scotopic ... ...

Abstract	A 63-year-old male with a history of bladder cancer in remission presented with progressive vision loss during a period of 2 years. Slit-lamp and funduscopic examination were unremarkable. Electroretinogram (ERG) revealed an unrecordable scotopic response and a moderately decreased photopic response. Computed tomography of the chest, abdomen, and pelvis showed a new duodenal mass. Subsequent biopsy disclosed malignant melanoma, and a diagnosis of melanoma-associated retinopathy (MAR) was made. The patient was then treated with a dexamethasone intravitreal implant 0.7 mg in his left eye. Two months after the implant, the patient reported a mild symptomatic improvement in his left eye, and ERG testing performed after the implant insertion revealed partial improvement in several scotopic and photopic ERG parameters. Repeat spectral-domain optical coherence tomography disclosed an improvement in retinal thickening. To the best of the authors' knowledge, this is the first report illustrating potential subjective visual improvement, improvement in retinal thickening, and ERG changes following treatment by intravitreal dexamethasone implant for MAR.
MeSH term(s)	Dexamethasone ; Drug Implants ; Electroretinography ; Glucocorticoids ; Humans ; Intravitreal Injections ; Male ; Melanoma/complications ; Melanoma/diagnosis ; Melanoma/drug therapy ; Middle Aged ; Paraneoplastic Syndromes, Ocular ; Skin Neoplasms ; Tomography, Optical Coherence
Chemical Substances	Drug Implants ; Glucocorticoids ; Dexamethasone (7S5I7G3JQL)
Language	English
Publishing date	2021-08-01
Publishing country	United States
Document type	Case Reports ; Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2701167-7
ISSN	2325-8179 ; 2325-8160
ISSN (online)	2325-8179
ISSN	2325-8160
DOI	10.3928/23258160-20210727-09
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Article: Postoperative Outcome of Combined Phacovitrectomy in Eyes with Excessive Myopia (>-30 D).

Fan, Hua / Zhang, Mingming / Tzekov, Radouil / Qian, Zhuyun / Yang, Jiasong / Xie, XiaoLin / Li, Wensheng

Case reports in ophthalmological medicine

2023 Volume 2023, Page(s) 7367922

Abstract: Background: To report the outcomes of phacoemulsification combined with vitrectomy in eyes with extreme myopia (-30 diopters or more). : Conclusions: To the best of the authors' knowledge, these represent the first reported clinical cases of combined ...

Abstract	Background: To report the outcomes of phacoemulsification combined with vitrectomy in eyes with extreme myopia (-30 diopters or more). Conclusions: To the best of the authors' knowledge, these represent the first reported clinical cases of combined cataract extraction+vitrectomy surgery in eyes with extreme (>-30 D) myopia. Our results support the notion that phacoemulsification combined with vitrectomy may be a good therapeutic option for cataracts and vitreous floaters in cases with extreme myopia.
Language	English
Publishing date	2023-11-14
Publishing country	United States
Document type	Case Reports
ZDB-ID	2659091-8
ISSN	2090-6730 ; 2090-6722
ISSN (online)	2090-6730
ISSN	2090-6722
DOI	10.1155/2023/7367922
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