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Proliferative vitreoretinopathy

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https://www.readbyqxmd.com/read/29146307/long-term-visual-outcomes-and-safety-profile-of-27-gauge-pars-plana-vitrectomy-for-posterior-segment-disease
#1
M Ali Khan, Alexander Kuley, Christopher D Riemann, Maria H Berrocal, Rohit R Lakhanpal, Jason Hsu, Arunan Sivalingam, Allen C Ho, Carl D Regillo
PURPOSE: To report longer-term outcomes of 27-gauge pars plana vitrectomy (PPV) in eyes with posterior segment disease. DESIGN: Multicenter, retrospective, interventional case series. PARTICIPANTS: A total of 390 eyes of 360 patients undergoing 27-gauge PPV for a vitreoretinal surgery indication. INTERVENTION: Three-port, transconjunctival, 27-gauge PPV. MAIN OUTCOME MEASURES: Change in visual acuity (VA) and occurrence of intraoperative and postoperative complications with a minimum follow-up of 365 days...
November 13, 2017: Ophthalmology
https://www.readbyqxmd.com/read/29133645/retinal-shortening-ultrasonic-evaluation-of-proliferative-vitreoretinopathy
#2
Brijesh Takkar, Shreyas Temkar, Nripen Gaur, Pradeep Venkatesh, Rohan Chawla, Atul Kumar
PURPOSE: To evaluate the effect of extraretinal proliferative vitreoretinopathy (PVR) on retinal shortening in eyes with rhegmatogenous retinal detachment (RD) using ultrasound (USG) and objectively prove the presence of intraretinal PVR (iPVR). METHODS: This is a double-masked pilot prospective controlled case series. Patients with total RD planned for vitreoretinal surgery were included in the study. USG was used to determine retinal-to-choroidal length ratios (RCRs) in all the quadrants...
November 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29125779/outcomes-of-recurrent-retinal-detachment-surgery-following-pars-plana-vitrectomy-for-rhegmatogenous-retinal-detachment
#3
Vikas Ambiya, Padmaja Kumari Rani, Raja Narayanan, Divya Balakrishnan, Jay Chhablani, Subhadra Jalali, Mudit Tyagi, Rajeev Reddy Pappuru
AIM: To study the anatomical and functional outcomes of recurrent retinal detachment (RD) surgery following pars plana vitrectomy (PPV) for rhegmatogenous retinal detachment. METHODS: Retrospective analysis of 133 consecutive cases of recurrent RD. INCLUSION CRITERIA: age ≥18 years, recurrent RD following PPV ± encircling band for rhegmatogenous RD. EXCLUSION CRITERIA: age <18 years, post-endophthalmitis/tractional/exudative/combined RD, post-scleral buckle, primary surgery done at another institute...
November 10, 2017: Seminars in Ophthalmology
https://www.readbyqxmd.com/read/29115885/a-novel-lipid-prodrug-strategy-for-sustained-delivery-of-hexadecyloxypropyl-9-2-phosphonomethoxy-ethyl-guanine-hdp-pmeg-on-unwanted-ocular-proliferation
#4
Mei Chen, Jiangping Hou, Guilin Tan, Peng Xie, William R Freeman, James R Beadle, Karl Y Hostetler, Lingyun Cheng
Proliferative vitreoretinopathy (PVR) is a blinding eye disease and there is no effective pharmacological measure to prevent PVR development. The difficulty comes from lack of potent antiproliferative agent and lack of sustained delivery to cover high-risk time window for PVR to develop. Lipid prodrug of PMEG, hexadecyloxypropyl 9-[(2-phosphonomethoxy)ethyl]guanine (HDP-PMEG), was prepared and was evaluated as a pharmacological adjuvant to surgical management of PVR. A dose-escalation study determined that the highest nontoxic dose for intravitreal use in pigmented rabbits was 3 µg per eye...
November 2017: Drug Delivery
https://www.readbyqxmd.com/read/29110611/curcumin-inhibits-proliferation-and-epithelial-mesenchymal-transition-of-retinal-pigment-epithelial-cells-via-multiple-pathways
#5
X Zhou, X Kuang, C Long, W Liu, Y Tang, L Liu, H Liu, J He, Z Huang, Y Fan, Q Zhang, H Shen
Proliferative vitreoretinopathy (PVR) is a disease caused by de-differentiation, translocation and proliferation of several types of local cells. These cells form fibrocellular membranes resulting in detachment of retinal and vision loss. PVR occurs in 8%-10% of patients undergoing primary retinal detachment (RD) surgery and becomes a major obstacle for successful RD repair. Retinal pigment epithelial (RPE) cells are among the major cells which consist of fibrocellular membranes. Re-proliferation and Epithelial-mesenchymal transition (EMT) are the primary pathological alteration of RPE cells in PVR...
November 5, 2017: Current Molecular Medicine
https://www.readbyqxmd.com/read/29109865/om-101-decreases-the-fibrotic-response-associated-with-proliferative-vitreoretinopathy
#6
Zeev Dvashi, Keren Ben-Yaakov, Tamir Weinberg, Yoel Greenwald, Ayala Pollack
Purpose: This study aimed to investigate the effect of OM-101 on the fibrotic response occurring in proliferative vitreoretinopathy (PVR) in an animal model. Methods: Antifibrotic effect of OM-101 was investigated in vivo. As control, eight weeks old c57black mice underwent intravitreal injection with Hepes (group A) or dispase (0.3 units), to induce retinal detachment (RD) and PVR. The dispase-injected mice were randomly divided into two groups B and C (N = 25 mice); in group C, the eyes were treated with intravitreal injection of OM-101 (3 μl), and group B with PBS, as a control...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/29102915/retinoic-acid-loaded-alginate-microspheres-as-a-slow-release-drug-delivery-carrier-for-intravitreal-treatment
#7
Fengxiang Wang, Shouzhi He, Bin Chen
Pharmacotherapy were the mainstream methods for the treatment of proliferative vitreoretinopathy (PVR), one of the leading causes of blindness. Due to the negligible side-effects, retinoic acid (RA) was considered to be a promising candidate drug. However, it was still a challenge to deliver drugs into vitreous with both long-term efficiency and biosafety. Sodium alginate was considered to be an excellent drug carrier owing to its controlled size, good biocompatibility and degradability. Based on a one-time synthetic strategy of preparing RA-sodium alginate microspheres, the study was aimed to establish a non-toxic and effective RA slow release platform...
November 2, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29095360/scleral-buckling-for-primary-rhegmatogenous-retinal-detachment-using-a-noncontact-wide-angle-viewing-system-with-a-cannula-based-27-g-chandelier-endoilluminator
#8
Tomaso Caporossi, Lucia Finocchio, Francesco Barca, Fabrizio Franco, Ruggero Tartaro, Stanislao Rizzo
PURPOSE: To assess the outcome of scleral buckling surgery using a noncontact wide-angle viewing system for fundus visualization in patients with rhegmatogenous retinal detachment. METHODS: Twenty-eight eyes of 28 patients underwent a modified scleral buckling surgery using a noncontact wide-angle viewing system combined with a 27-gauge optic fiber inserted into the sclera at the pars plana through a valved 27-gauge trocar. RESULTS: The mean age of the patients was 61...
October 30, 2017: Retina
https://www.readbyqxmd.com/read/29079201/pdgf-c-and-pdgf-d-in-ocular-diseases
#9
REVIEW
Anil Kumar, Xuri Li
PDGFs and their receptors are critical regulators of numerous tissues and organs, including the eye. Extensive studies have shown that PDGFs and their receptors play critical roles in many ocular neovascular diseases, such as neovascular age-related macular degeneration, retinopathy of prematurity, and proliferative vitreoretinopathy. In addition, PDGFs and PDGFRs are also important players in ocular diseases involving the degeneration of retinal neuronal and vascular cells, such as glaucoma and retinitis pigmentosa...
October 24, 2017: Molecular Aspects of Medicine
https://www.readbyqxmd.com/read/29068530/postoperative-aqueous-humour-flare-as-a-surrogate-marker-for-proliferative-vitreoretinopathy-development
#10
Verena C Mulder, Elon H C van Dijk, Ida A van Meurs, Ellen C La Heij, Jan C van Meurs
PURPOSE: As some surgical procedures have been shown to increase postoperative flare values and thus contribute to blood-ocular barrier breakdown, retinal reattachment surgery might influence the risk of developing proliferative vitreoretinopathy (PVR). Therefore, we investigated whether postoperative aqueous flare values are a surrogate marker for the development of postoperative PVR. METHODS: We prospectively included 195 patients with primary rhegmatogenous retinal detachment (RRD) and measured aqueous laser flare preoperatively, and at 2 and 6 weeks postoperatively...
October 25, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/29066859/epiretinal-membrane-and-cystoid-macular-edema-as-predictive-factors-of-recurrent-proliferative-vitreoretinopathy
#11
Kunyong Xu, Eric K Chin, D Wilkin Parke, David Rp Almeida
PURPOSE: Proliferative vitreoretinopathy (PVR) is the most common cause of recurrent retinal detachment (RD). We sought to determine the predictive factors of recurrent PVR formation and the need for additional vitreoretinal surgical intervention after uncomplicated primary RD repair. METHODS: This is a retrospective single-center case-control study of consecutive patients with PVR formation after uncomplicated RD repair. Logistic regression was used to assess factors associated with recurrent PVR formation...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/29049737/introduction-of-the-mdm2-t309g-mutation-in-primary-human-retinal-epithelial-cells-enhances-experimental-proliferative-vitreoretinopathy
#12
Guohong Zhou, Yajiang Duan, Gaoen Ma, Wenyi Wu, Zhengping Hu, Na Chen, Yewlin Chee, Jing Cui, Arif Samad, Joanne A Matsubara, Shizuo Mukai, Patricia A D'Amore, Hetian Lei
Purpose: The murine double minute (MDM)2 is a critical negative regulator of the p53 tumor suppressor, and MDM2 SNP309G is associated with a higher risk of proliferative vitreoretinopathy (PVR); in addition, the MDM2 T309G created using clustered regularly interspaced short palindromic repeats (CRISPR)/associated endonuclease (Cas)9 enhances normal rabbit vitreous-induced expression of MDM2 and survival of primary human retinal pigment epithelial (hRPE) cells in vitro. The goal of this study was to determine whether this MDM2 T309G contributes to the development of experimental PVR...
October 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29034157/endoscope-assisted-vitrectomy-in-the-management-of-retinal-detachment-with-corneal-opacity
#13
Yu-Fang Huang, Chia-Jen Chang
A 51-year-old male who had suffered from right eye rhegmatogenous retinal detachment with proliferative vitreoretinopathy received surgical treatments which included the following procedures: lens extraction, scleral buckle, vitrectomy, membrane peeling, photocoagulation, and silicone oil injection. The presenting visual acuity of the right eye was light perception. Slit-lamp examination revealed corneal opacity without a visible fundus. B-scan ultrasonography revealed retinal detachment. Endoscope-assisted vitrectomy was then performed in December 2014...
July 2017: Taiwan Journal of Ophthalmology
https://www.readbyqxmd.com/read/29033535/differential-association-of-elevated-inflammatory-cytokines-with-postoperative-fibrous-proliferation-and-neovascularization-after-unsuccessful-vitrectomy-in-eyes-with-proliferative-diabetic-retinopathy
#14
Shigeo Yoshida, Yoshiyuki Kobayashi, Shintaro Nakao, Yukio Sassa, Toshio Hisatomi, Yasuhiro Ikeda, Yuji Oshima, Toshihiro Kono, Tatsuro Ishibashi, Koh-Hei Sonoda
BACKGROUND: Pars plana vitrectomy is the only treatment for advanced proliferative diabetic retinopathy (PDR). However, vitrectomy is not always successful despite current progress in vitreoretinal surgical techniques. The aim of our study was to investigate whether the vitreal concentrations of MCP-1, IL-6, IL-8, and VEGF are elevated after unsuccessful vitrectomy in patients with PDR and to investigate whether the altered levels of these cytokines are associated with the cause for the reoperation...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28970011/crocetin-inhibits-the-proliferation-migration-and-tgf-%C3%AE-2-induced-epithelial-mesenchymal-transition-of-retinal-pigment-epithelial-cells
#15
Hui-Fang Wang, Jing-Xue Ma, Qing-Li Shang, Jian-Bin An, Hai-Ting Chen
Retinal pigment epithelial (RPE) cells, the major cell type in the fibrotic membrane of proliferative vitreoretinopathy, display enhanced proliferative and migratory capacities and epithelial-mesenchymal transition (EMT). In this study, we investigated the potential impact of crocetin on the proliferation, migration and EMT of cultured ARPE-19 cells. The cells were treated with crocetin alone or in combination with transforming growth factor-β2 (TGF-β2). Cell proliferation was examined using the CCK-8 assay...
November 15, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28942445/effect-of-biodegradable-scleral-plugs-containing-curcumin-on-proliferative-vitreoretinopathy
#16
Jun Zhang, Nalei Zhou, Bin Zhang, Jingxue Ma
BACKGROUND: This study aimed to explore the inhibitory effect of biodegradable scleral plugs containing curcumin on rabbits with proliferative vitreoretinopathy (PVR). MATERIALS AND METHODS: The biodegradable scleral plugs containing curcumin were prepared by dissolving PLGA [poly(lactide-co-glycolide)] and curcumin. In total, 30 rabbits were divided into 2 groups: the model group received a vitreous injection of self-blood, and the treatment group received a vitreous injection of self-blood plus biodegradable scleral implants containing 1...
September 23, 2017: Ophthalmic Research
https://www.readbyqxmd.com/read/28913545/periostin-in-vitreoretinal-diseases
#17
REVIEW
Shigeo Yoshida, Takahito Nakama, Keijiro Ishikawa, Shintaro Nakao, Koh-Hei Sonoda, Tatsuro Ishibashi
Proliferative vitreoretinal diseases such as diabetic retinopathy, proliferative vitreoretinopathy (PVR), and age-related macular degeneration are a leading cause of decreased vision and blindness in developed countries. In these diseases, retinal fibro(vascular) membrane (FVM) formation above and beneath the retina plays an important role. Gene expression profiling of human FVMs revealed significant upregulation of periostin. Subsequent analyses demonstrated increased periostin expression in the vitreous of patients with both proliferative diabetic retinopathy and PVR...
December 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28906008/role-of-macrophage-migration-inhibitory-factor-mif-in-the-effects-of-oxidative-stress-on-human-retinal-pigment-epithelial-cells
#18
Ji-Ae Ko, Yasuyuki Sotani, Diah Gemala Ibrahim, Yoshiaki Kiuchi
Proliferative vitreoretinopathy (PVR) is the major cause of treatment failure in individuals who undergo surgery for retinal detachment. The epithelial-mesenchymal transition (EMT) in retinal pigment epithelium (RPE) cells contributes to the pathogenesis of PVR. Oxidative stress is thought to play a role in the progression of retinal diseases including PVR. We have now examined the effects of oxidative stress on the EMT and related processes in the human RPE cell line. We found that H2 O2 induced the contraction of RPE cells in a three-dimensional collagen gel...
September 14, 2017: Cell Biochemistry and Function
https://www.readbyqxmd.com/read/28895627/-vitreous-substitute-in-retinal-detachment-surgery-why-we-need-a-new-tamponade-strategy
#19
Peter Szurman
Pars plana vitrectomy combined with an endotamponade is the most important concept in retinal detachment surgery. Numerous advances in techniques and tamponade materials have been made, but the general problems of retinal detachment surgery are still unsolved: The primary success rate is not adequate, and there is no adequate strategy to address proliferative vitreoretinopathy, multiple retinal breaks or persistent hypotony. The story of tamponades is full of myths and misunderstandings. A critical review shows that tamponades have only a minor role in the history of retinal detachment surgery...
September 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28877445/anti-fibrosis-effect-of-nanoparticle-mediated-delivery-of-plasminogen-kringle-5
#20
Yi Lu, Weizhong Gu, Yanhong Ren, Jia Feng, Lili Yang, Ji Jin
Retinal fibrosis, including epiretinal membrane (ERM) and proliferative vitreoretinopathy (PVR), is an ocular disease that can lead to blindness. An efficacious therapy remains an unmet medical challenge. In this study, we intended to explore the inhibitory effects of the nanoparticle-mediated delivery of plasminogen kringle 5 (K5-NPs) on laser-induced ERM and to identify the potential anti-fibrosis targets of K5-NPs. A rat model of laser-induced ERM was used. Control-NPs or K5-NPs were intravitreally injected...
June 2017: Discovery Medicine
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