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Parekh M, Ruzza A, Rovati M, Tzamalis A, Romano D, Gupta N, Vaddavalli P, Bhogal M, Jhanji V, Sawant O, Semeraro F, Ponzin D, Jacob S, Dragnea DC, Rodriguez-Calvo-de-Mora M, Dhubhghaill SN, Fogla R, Sharma N, Jurkunas UV, Ferrari S, Romano V. DMEK surgical training: An instructional guide on various wet-lab methods. Surv Ophthalmol 2023; 68:1129-1152. [PMID: 37392969 DOI: 10.1016/j.survophthal.2023.06.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 06/21/2023] [Accepted: 06/26/2023] [Indexed: 07/03/2023]
Abstract
Descemet membrane endothelial keratoplasty (DMEK) is a partial-thickness corneal transplantation procedure that involves selective transplantation of the Descemet membrane and endothelium. DMEK offers significant advantages over other keratoplasty techniques, such as faster visual rehabilitation, better final visual acuity due to minimal optical interface effects, lower risk of allograft rejection, and less long-term dependence on topical steroids. Despite all its advantages, DMEK has been found to be more challenging than other corneal transplantation techniques, and its steep learning curve appears to be an obstacle to its widespread use and adoption by corneal surgeons worldwide. DMEK surgical training laboratories (wet labs) provide a window of opportunity for surgeons to learn, prepare, manipulate, and deliver these grafts in a risk-free environment. Wet labs are a significant learning tool, especially for those institutions that have limited tissue availability in their local centers. We provide a step-by-step guide for preparing DMEK grafts using different techniques on human and nonhuman models with instructional videos. This article should eventually help the trainees and the educators understand the requirements for performing DMEK and conducting a DMEK wet lab and develop their skills and interests from a wide variety of available techniques.
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Affiliation(s)
- Mohit Parekh
- Schepens Eye Research Institute of Mass Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA, USA.
| | - Alessandro Ruzza
- International Center for Ocular Physiopathology, Fondazione Banca degli Occhi del Veneto Onlus, Venice, Italy
| | - Marco Rovati
- Eye Unit, Department of Medical and Surgical Specialties, Radiological Sciences, and Public Health, University of Brescia, Brescia, Italy
| | - Argyrios Tzamalis
- 2nd Department of Ophthalmology, Aristotle University of Thessaloniki, Papageorgiou General Hospital, Thessaloniki, Greece
| | - Davide Romano
- Eye Unit, Department of Medical and Surgical Specialties, Radiological Sciences, and Public Health, University of Brescia, Brescia, Italy
| | - Nidhi Gupta
- Department of Cornea, Refractive Surgery and Ocular Surface Disorders, Dr. Shroff's Charity Eye Hospital, New Delhi, India
| | - Pravin Vaddavalli
- Cornea Institute, LV Prasad Eye Institute, Hyderabad, Telangana, India
| | | | - Vishal Jhanji
- Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Onkar Sawant
- Department of Research and Development, Center for Vision and Eye Banking Research, Eversight, Cleveland, OH, USA
| | - Francesco Semeraro
- Eye Unit, Department of Medical and Surgical Specialties, Radiological Sciences, and Public Health, University of Brescia, Brescia, Italy
| | - Diego Ponzin
- International Center for Ocular Physiopathology, Fondazione Banca degli Occhi del Veneto Onlus, Venice, Italy
| | - Soosan Jacob
- Department of Cataract and Glaucoma Services, Dr. Agarwal's Refractive and Cornea Foundation, Chennai, India
| | | | | | | | - Rajesh Fogla
- Department of Ophthalmology, Apollo Hospitals, Hyderabad, Telangana, India
| | - Namrata Sharma
- Department of Ophthalmology, All India Institute of Medical Sciences, New Delhi, India
| | - Ula V Jurkunas
- Schepens Eye Research Institute of Mass Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA, USA
| | - Stefano Ferrari
- International Center for Ocular Physiopathology, Fondazione Banca degli Occhi del Veneto Onlus, Venice, Italy
| | - Vito Romano
- Eye Unit, Department of Medical and Surgical Specialties, Radiological Sciences, and Public Health, University of Brescia, Brescia, Italy; Eye Unit, ASST Spedali Civili di Brescia, Brescia, Italy.
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Arya SS, Sawant O, Sonawane SK, Show PL, Waghamare A, Hilares R, Santos JCD. Novel, Nonthermal, Energy Efficient, Industrially Scalable Hydrodynamic Cavitation – Applications in Food Processing. Food Reviews International 2019. [DOI: 10.1080/87559129.2019.1669163] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- S. S. Arya
- Food Engineering and Technology Department, Institute of Chemical Technology, Mumbai, India
- Department of Biotechnology, Engineering School of Lorena, University of São Paulo, São Paulo, Brazil
| | - O. Sawant
- Food Engineering and Technology Department, Institute of Chemical Technology, Mumbai, India
| | - Sachin K. Sonawane
- Food Science and Technology, School of Biotechnology and Bioinformatics, D. Y. Patil University, Navi Mumbai, India
| | - P. L Show
- Department of Chemical and Environmental Engineering, The University of Nottingham Malaysia Campus, Semenyih, Malaysia
| | - A. Waghamare
- Food Engineering and Technology Department, Institute of Chemical Technology, Mumbai, India
| | - Ruly Hilares
- Department of Biotechnology, Engineering School of Lorena, University of São Paulo, São Paulo, Brazil
| | - Júlio César Dos Santos
- Department of Biotechnology, Engineering School of Lorena, University of São Paulo, São Paulo, Brazil
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Sawant O, Horton AM, Shukla M, Rayborn ME, Peachey NS, Hollyfield JG, Rao S. Light-Regulated Thyroid Hormone Signaling Is Required for Rod Photoreceptor Development in the Mouse Retina. Invest Ophthalmol Vis Sci 2016; 56:8248-57. [PMID: 26720479 DOI: 10.1167/iovs.15-17743] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
PURPOSE Ambient light is both a stimulus for visual function and a regulator of photoreceptor physiology. However, it is not known if light can regulate any aspect of photoreceptor development. The purpose of this study was to investigate whether ambient light is required for the development of mouse rod photoreceptors. METHODS Newborn mouse pups (C57BL/6) were reared in either cyclic light (LD) or constant dark (DD). Pups were collected at postnatal day (P)5, P10, P17, or P24. We performed retinal morphometric and cell death analysis at P5, P10, and P17. Rhodopsin expression was assessed using immunofluorescence, Western blot, and quantitative RT-PCR analysis. Electroretinograms were performed at P17 and P24. Radioimmunoassay and ELISA were used to follow changes in thyroid hormone levels in the serum and vitreous. RESULTS In the DD pups, the outer nuclear layer was significantly thinner at P10 and there were higher numbers of apoptotic cells at P5 compared to the LD pups. Rhodopsin expression was lower at P10 and P17 in DD pups. Electroretinogram a-waves were reduced in amplitude at P17 in the DD pups. The DD animals had lower levels of circulating thyroid hormones at P10. Light-mediated changes in thyroid hormones occur as early as P5, as we detected lower levels of total triiodothyronine in the vitreous from the DD animals. Drug-induced developmental hypothyroidism resulted in lower rhodopsin expression at P10. CONCLUSIONS Our data demonstrate that light exposure during postnatal development is required for rod photoreceptor development and that this effect could be mediated by thyroid hormone signaling.
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Affiliation(s)
- Onkar Sawant
- Department of Ophthalmic Research, Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio, United States
| | - Amanda M Horton
- Department of Ophthalmic Research, Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio, United States
| | - Meenal Shukla
- Department of Ophthalmic Research, Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio, United States
| | - Mary E Rayborn
- Department of Ophthalmic Research, Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio, United States
| | - Neal S Peachey
- Department of Ophthalmic Research, Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio, United States 2Department of Ophthalmology, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio, United States 3Louis Sto
| | - Joe G Hollyfield
- Department of Ophthalmic Research, Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio, United States 2Department of Ophthalmology, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio, United States
| | - Sujata Rao
- Department of Ophthalmic Research, Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio, United States 2Department of Ophthalmology, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio, United States
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Balaraman S, Lunde ER, Sawant O, Cudd TA, Washburn SE, Miranda RC. Maternal and neonatal plasma microRNA biomarkers for fetal alcohol exposure in an ovine model. Alcohol Clin Exp Res 2014; 38:1390-400. [PMID: 24588274 DOI: 10.1111/acer.12378] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [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: 07/02/2013] [Accepted: 01/09/2014] [Indexed: 12/12/2022]
Abstract
BACKGROUND Plasma or circulating miRNAs (cir miRNAs) have potential diagnostic value as biomarkers for a range of diseases. Based on observations that ethanol (EtOH) altered intracellular miRNAs during development, we tested the hypothesis that plasma miRNAs were biomarkers for maternal alcohol exposure, and for past in utero exposure, in the neonate. METHODS Pregnant sheep were exposed to a binge model of EtOH consumption resulting in an average peak blood alcohol content of 243 mg/dl, for a third-trimester-equivalent period from gestational day 4 (GD4) to GD132. MiRNA profiles were assessed by quantitative PCR analysis in plasma, erythrocyte, and leukocytes obtained from nonpregnant ewes, and plasma from pregnant ewes 24 hours following the last binge EtOH episode, and from newborn lambs, at birth on ~GD147. RESULTS Pregnant ewe and newborn lamb cir miRNA profiles were similar to each other and different from nonpregnant female plasma, erythrocyte, or leukocyte miRNAs. Significant changes in cir miRNA profiles were observed in the EtOH-exposed ewe and, at birth, in the in utero, EtOH-exposed lamb. Cir miRNAs including miR-9, -15b, -19b, and -20a were sensitive and specific measures of EtOH exposure in both pregnant ewe and newborn lamb. Additionally, EtOH exposure altered guide-to-passenger strand cir miRNA ratios in the pregnant ewe, but not in the lamb. CONCLUSIONS Shared profiles between pregnant dam and neonate suggest possible maternal-fetal miRNA transfer. Cir miRNAs are biomarkers for alcohol exposure during pregnancy, in both mother and neonate, and may constitute an important shared endocrine biomarker that is vulnerable to the maternal environment.
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Affiliation(s)
- Sridevi Balaraman
- Department of Neuroscience and Experimental Therapeutics, and Women's Health in Neuroscience Program, Texas A&M Health Science Center, College of Medicine, Bryan, Texas
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