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Internal limiting membrane

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https://www.readbyqxmd.com/read/28098729/vitrectomy-for-persistent-macular-holes-following-ocriplasmin-injection-a-comparative-multicenter-study
#1
Ricarda G Schumann, Armin Wolf, Hans Hoerauf, Albrecht Lommatzsch, Mathias Maier, Joachim Wachtlin, Michael J Koss, Thomas Kreutzer, Thomas Bertelmann, Sara Kazerounian, Stefan Mennel, Siegfried G Priglinger
PURPOSE: To determine functional and anatomical outcomes of pars plana vitrectomy for persistent full-thickness macular hole (MH) after intravitreal injection of ocriplasmin. METHODS: This is a multicenter retrospective interventional study of 37 eyes of 37 patients who underwent pars plana vitrectomy with internal limiting membrane peeling for persistent MH after ocriplasmin treatment between December 2013 and December 2015 and comparison with 35 eyes of 35 patients who were offered ocriplasmin injection but underwent pars plana vitrectomy alone without pharmacologic vitreolysis before surgery...
January 16, 2017: Retina
https://www.readbyqxmd.com/read/28098723/assessment-of-the-internal-limiting-membrane-status-when-a-macular-epiretinal-membrane-is-removed-in-a-prospective-study
#2
Daniel Vila Solà, Cristofer Nienow, Ignasi Jürgens
PURPOSE: To describe the presence and integrity of the internal limiting membrane (ILM) after removal of the macular epiretinal membrane (ERM) and to investigate the accuracy of tissue identification using surgical dyes when compared to histopathology results. METHODS: Patients with idiopathic ERM were enrolled in a prospective study and randomized to one of two surgical techniques. In one (Group M), only the ERM was deliberately removed and in the other (Group L) the ILM was also removed...
January 16, 2017: Retina
https://www.readbyqxmd.com/read/28093123/synthesis-of-stable-isotopically-labeled-peptides-with-filter-assisted-enzymatic-labeling-for-the-diagnosis-of-hepatitis-b-virus-infection-utilizing-mass-spectrometry-based-proteomics-strategy
#3
Hsing-Fen Tsai, He-Hsuan Hsiao
A facile method for the preparation of stable isotopically labeled peptides was developed by means of filter-assisted tryptic (16)O/(18)O water labeling, which could be directly applied to the determination of hepatitis B virus infection from human serum with tandem mass spectrometry. Tryptic peptides of hepatitis B surface antigen or hepatitis B e antigen from different subtypes of hepatitis B virus were synthesized with traditional solid-phase peptide synthesis as potential biomarkers. Trypsin catalyzed oxygen-18 exchange at their amidated c-terminus of arginine or lysine residue...
March 1, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28087485/stepwise-targeted-drug-delivery-to-liver-cancer-cells-for-enhanced-therapeutic-efficacy-by-galactose-grafted-ultra-ph-sensitive-micelles
#4
Guoqing Yan, Jun Wang, Liefeng Hu, Xin Wang, Guanqing Yang, Shengxiang Fu, Xu Cheng, Panpan Zhang, Rupei Tang
: To promote drug accumulation and cell-killing ability at tumor tissue, we have prepared a stepwise targeted drug delivery system that can remain stealthy and long-circulating in the blood vessels, improve drug retention at extracellular stimuli, enhance cellular uptake through special targeting ligands, and then achieve rapid drug release to improve toxicity to tumor cells at intracellular stimuli. Herein, galactose-grafted, ultra-pH-sensitive drug carriers (POEAd-g-LA-DOX micelles), which could respond to both extracellular and intracellular pH, and combine with galactose-receptors in cell membrane, were constructed by a facile method, therefore achieving: (i) remaining stable at pH 7...
January 10, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28079613/centripetal-movement-of-the-capillaries-in-the-central-macular-region-after-internal-limiting-membrane-peeling
#5
Kazuyuki Kumagai, Masanori Hangai, Mariko Furukawa, Tetsuyuki Suetsugu, Nobuchika Ogino
PURPOSE: To report a case that showed centripetal movements of the capillaries in the central macular region after vitrectomy with internal limiting membrane peeling. METHODS: A 57-year-old pseudophakic woman underwent successful vitrectomy with internal limiting membrane peeling and air tamponade for a vitreomacular traction. Optical coherence tomography angiographic images of the 3 mm × 3 mm inner retinal vascular plexus were examined preoperatively and at 3 months postoperatively...
January 11, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28074773/low-dose-dialysis-combined-with-low-protein-intake-can-maintain-nitrogen-balance-in-peritoneal-dialysis-patients-in-poor-economies%C3%A2
#6
Chun-Yan Su, Tao Wang, Xin-Hong Lu, Sha Ma, Wen Tang, Pei-Yu Wang
OBJECTIVE: Due to limited economic conditions, we tried to provide "fitted" dialysis doses instead of the doses recommended by the international guidelines to the individual patients. In the present cross-sectional study, we studied the dialysis adequacy and nutritional status of 5 peritoneal dialysis patients who had a low dialysis dose (2 bags, 4,000 mL/day). METHODS: The 3-day dietary records were reviewed to calculate patients' energy, protein, and nitrogen intake (NI)...
February 2017: Clinical Nephrology
https://www.readbyqxmd.com/read/28069661/bimodal-dynamics-of-granular-organelles-in-primary-renin-expressing-cells-revealed-using-tirf-microscopy
#7
Charlotte Buckley, Alison R Dun, Audrey Peter, Christopher Bellamy, Kenneth W Gross, Rory R Duncan, John J Mullins
Renin is the initiator and rate-limiting factor in the renin-angiotensin blood pressure regulation system. Although renin is not exclusively produced in the kidney, in nonmurine species the synthesis and secretion of the active circulatory enzyme is confined almost exclusively to the dense core granules of juxtaglomerular (JG) cells, where prorenin is processed and stored for release via a regulated pathway. Despite its importance, the structural organization and regulation of granules within these cells is not well understood, in part due to the difficulty in culturing primary JG cells in vitro and the lack of appropriate cell lines...
January 1, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28067723/inverted-internal-limiting-membrane-flap-technique-versus-complete-internal-limiting-membrane-removal-in-myopic-macular-hole-surgery-a-comparative-study
#8
Maurizio Mete, Alessandro Alfano, Massimo Guerriero, Guido Prigione, Mauro Sartore, Antonio Polito, Grazia Pertile
PURPOSE: To compare the results of vitrectomy with complete internal limiting membrane (ILM) removal and inverted ILM flap in the treatment of myopic macular hole (MMH). METHODS: Seventy eyes of 68 patients with MMH undergone pars-plana vitrectomy (PPV) with either complete ILM removal (n = 36, Group 1) or inverted ILM flap technique (n = 34, Group 2) were included in the study. Outcomes measured were the rate of MMH closure assessed by optical coherence tomography (OCT) and visual acuity (BCVA) at six months...
January 6, 2017: Retina
https://www.readbyqxmd.com/read/28065935/two-birds-one-stone-dual-targeting-of-the-cancer-cell-surface-and-subcellular-mitochondria-by-the-galectin-3-binding-peptide-g3-c12
#9
Wei Sun, Lian Li, Qing-Qing Yang, Zhi-Rong Zhang, Yuan Huang
Active tumor-targeting approaches using specific ligands have drawn considerable attention over the years. However, a single ligand often fails to simultaneously target the cancer cell surface and subcellular organelles, which limits the maximum therapeutic efficacy of delivered drugs. We describe a polymeric delivery system modified with the G3-C12 peptide for sequential dual targeting. In this study, galectin-3-targeted G3-C12 peptide was conjugated onto the N-(2-hydroxypropyl) methacrylamide (HPMA) copolymer for the delivery of D(KLAKLAK)2 (KLA) peptide...
January 9, 2017: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/28056183/cell-seeded-autologous-chondrocyte-implantation
#10
Andreas H Gomoll, Amy Phan, Marissa Mastrocola, Luiz Felipe Ambra, Nehal Shah
BACKGROUND: The use of autologous chondrocyte implantation (ACI) remains limited, even though multiple studies have demonstrated success rates exceeding 75%. The procedure is perceived as invasive and technically challenging, presenting barriers to more widespread adoption. Purpose/Hypothesis: The objective of this study was to investigate whether outcomes and the failure rate of a simplified ACI technique (cs-ACI) were comparable with those of the more complicated traditional technique of a chondrocyte suspension injected under a collagen membrane (cACI)...
December 1, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28045374/the-role-of-internal-limiting-membrane-peeling-in-epiretinal-membrane-surgery-a-randomised-controlled-trial
#11
Paris Tranos, Stavrenia Koukoula, Davic G Charteris, Georgia Perganda, Athanasios Vakalis, Solon Asteriadis, Ilias Georgalas, Petros Petrou
PURPOSE: To compare the anatomical and functional outcomes after primary idiopathic epiretinal membrane (ERM) peeling with or without internal limiting membrane (ILM) peeling. DESIGN: A two-centre randomised, controlled clinical trial with 12 months of follow-up. METHODS: One hundred and two eyes of 102 patients were included in the analysis and were randomised into two groups (ILM peeling (P) and non-ILM peeling (NP) group). Inclusion criteria were: Idiopathic ERM confirmed on optical coherence tomography, age ≥18 years, binocular distortion, best-corrected visual acuity (BCVA) ≤90 ETDRS letters, intraocular pressure ≤23 mm Hg and informed consent...
October 7, 2016: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28043309/visual-and-anatomical-outcomes-following-idiopathic-macular-epiretinal-membrane-surgery
#12
Bashiran Shahzadi, Syed Fawad Rizvi, Kanwal Latif, Faisal Murtaza, Saliha Naz
OBJECTIVE: To assess the visual and anatomical outcomes following idiopathic macular epiretinal membrane (IERM) surgery. STUDY DESIGN: Case series. PLACE AND DURATION OF STUDY: Layton Rehmatulla Benevolent Trust (L.R.B.T), Free Base Eye Hospital, Karachi, from January 2015 to June 2016. METHODOLOGY: Thirty eyes of thirty patients affected with idiopathic macular epiretinal membrane stage 2 were enrolled in this study...
December 2016: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28040090/masquelet-technique-myth-or-reality-a-systematic-review-and-meta-analysis
#13
Ilaria Morelli, Lorenzo Drago, David A George, Enrico Gallazzi, Sara Scarponi, Carlo L Romanò
INTRODUCTION: The induced membrane technique (IMT) or Masquelet technique, is a two-step surgical procedure used to treat pseudoarthroses and bony defects. Many authors have introduced variants to the technique. This study aims to compare the surgical variants of IMT and to evaluate its efficacy in achieving infection eradication and bone union. METHODS: A systematic review was carried out following the PRISMA guidelines. PubMed and other medical databases were explored using keywords "Masquelet technique" and "induced membrane technique"...
December 2016: Injury
https://www.readbyqxmd.com/read/28031697/clinical-and-histological-evaluation-of-large-macular-hole-surgery-using-the-inverted-internal-limiting-membrane-flap-technique
#14
Satoru Kase, Wataru Saito, Shohei Mori, Michiyuki Saito, Ryo Ando, Zhenyu Dong, Tomohiro Suzuki, Kousuke Noda, Susumu Ishida
PURPOSE: The aims of this study were to analyze optical coherence tomography (OCT) imaging of large macular holes (MHs) treated with inverted internal limiting membrane (ILM) flap technique and to perform a histological examination of an ILM-like membrane tissue obtained during vitrectomy. PATIENTS AND METHODS: This is a retrospective observational case study. Nine patients, comprising of five males and four females, showing large and myopic MHs, underwent pars plana vitrectomy (PPV) with inverted ILM flap technique assisted by brilliant blue G (BBG) staining...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28029463/-tocolysis-for-preterm-labor-without-premature-preterm-rupture-of-membranes
#15
M Doret, G Kayem
OBJECTIVES: To propose guidelines for clinical practice for tocolysis in preterm labor without premature preterm rupture of the membranes (PPROM). MATERIALS AND METHODS: Bibliographic searches were performed in the Medline and Cochrane databases and gynecologist and obstetricians' international society guidelines. It is important to note that most studies included women in preterm labour with and without PPROM. RESULTS: Compared with placebo, tocolytics are not associated with a reduction in neonatal mortality or morbidity (LE2)...
October 28, 2016: Journal de Gynécologie, Obstétrique et Biologie de la Reproduction
https://www.readbyqxmd.com/read/28012608/internal-limiting-membrane-the-innermost-retinal-barrier
#16
Rohan Chawla, Koushik Tripathy, Shreyas Temkar, Vinod Kumar
Recently, peeling of internal limiting membrane (ILM) has become one of the most common and effective surgical procedures for macular disorders. The authors discuss the adverse effects of such procedures and explore the possible functions of the membrane. We also suggest a barrier function of this membrane in addition to its possible other physiological roles. Thus, apart from the well-known inner and outer retinal barriers, ILM might be the third and innermost retinal barrier. The possible evidences supporting this hypothesis are presented...
January 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28009775/chemotherapeutic-nadir-associated-retinopathy
#17
David Rivera-De La Parra, Enrique O Graue-Hernandez
PURPOSE: To describe subinternal limiting membrane hemorrhage as a retinal complication of chemotherapy nadir in a patient with leukemia. METHODS: Case report. RESULTS: A 23-year-old man presented with bilateral subinternal limiting membrane hemorrhages in both eyes as a manifestation of thrombocytopenia secondary to chemotherapy treatment for acute myeloid leukemia. CONCLUSION: Chemotherapeutic nadir-associated retinopathy may present with sub-internal limiting membrane hemorrhages most probably secondary to thrombocytopenia...
January 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28009345/the-role-of-membrane-inner-retina-adherence-in-predicting-simultaneous-internal-limiting-membrane-peeling-during-idiopathic-epiretinal-membrane-surgery
#18
P Tranos, L Wickham, N Dervenis, A Vakalis, S Asteriades, P Stavrakas
PurposeTo correlate the frequency and extent of simultaneous inadvertent internal limiting membrane (ILM) peeling during idiopathic epiretinal membrane (ERM) removal with characteristics of ERM adherence demonstrated on pre-operative spectral domain optical coherence tomography (SD-OCT).Patients and methodsThis is a prospective, observational, case series of patients undergoing pars plana vitrectomy for idiopathic ERM. Inner retina-ERM adhesion was categorized as focal, broad or complete in five anatomic locations at macular area based on preoperative SD-OCT findings...
December 23, 2016: Eye
https://www.readbyqxmd.com/read/27990359/effect-of-endothelial-progenitor-cells-derived-from-human-umbilical-cord-blood-on-oxygen-induced-retinopathy-in-mice-by-intravitreal-transplantation
#19
Dan Wang, Bo Zhang, Hui Shi, Wei Yang, Ming-Chao Bi, Xiang-Fu Song, Chen Zhang, Jian-Hui Cheng, Ji-Long Hao, E Song
AIM: To investigate the effect of endothelial progenitor cells (EPCs) labeled by carboxy fluorescein diacetate succinimidyl ester (CFSE) on murine oxygen-induced retinopathy (OIR) by intravitreal transplantation. METHODS: After isolated from human umbilical cord blood mononuclear cells, EPCs were cultivated and then labeled with CFSE in vitro. C57BL/6J mice were placed to 75% hyperoxia chamber from P7 to P12 to establish OIR model. At P12, OIR mice were intravitreally injected with 1 µL suspension contained 2×10(5) EPCs (EPCs group) or isometric phosphate buffered saline (PBS group)...
2016: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/27977840/bilateral-prefoveal-sub-internal-limiting-membrane-hemorrhage-in-autoimmune-hemolytic-anemia
#20
Akshay S Thomas, Scott D Walter, Sharon Fekrat
Severe anemia can cause multilayered retinal hemorrhages. A 65-year-old woman noted "red spheres" in the central vision of both eyes during a hospital admission for autoimmune hemolytic anemia. Examination revealed extensive multilayered retinal hemorrhages, including bilateral foveal preretinal hemorrhage. Spectral-domain optical coherence tomography localized the preretinal blood to the sub-internal limiting membrane (ILM) space. Various options are available for management of such hemorrhage, including observation for spontaneous resolution, YAG laser membranotomy, or pars plana vitrectomy with ILM peeling...
December 1, 2016: Ophthalmic Surgery, Lasers & Imaging Retina
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