Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 56
Filtrar
1.
Ocul Immunol Inflamm ; : 1-6, 2024 Apr 15.
Artigo em Inglês | MEDLINE | ID: mdl-38621024

RESUMO

PURPOSE: To describe the spectrum of clinical features of cytomegalovirus-related anterior uveitis (CMV-AU) along with potential comorbidities, to calculate complication rates, and to determine risk factors and biomarkers affecting prognosis in a cohort of a Southern European Mediterranean population. MATERIALS AND METHODS: It is a retrospective, multicenter case series of consecutive patients with persisting hypertensive AU, unresponsive to topical steroids therapy, and CMV-positive essays from two uveitis referral centers were collected and analyzed. RESULTS: Fifty-seven eyes of 53 patients with polymerase chain reaction-verified CMV-AU over a period of 8 years were included with a mean age of 48 ± 18. Four presentation patterns were identified: 26.3% as Posner-Schlossman-like, 31.6% as chronic AU, 19.3% as presumed herpetic uveitis, 12.3% as Fuchs uveitis syndrome-like, and 10.5% without specific initial classification. About 15.8% received oral valganciclovir, 22.8% received topical valganciclovir, and 61.4% received both, for a mean duration of treatment of 44 months. AU recurrences were observed in 23 eyes with a mean of 1.5 (±1.5) recurrences per year. The only finding significantly associated with recurrence was the presence of posterior synechiae (PS) (p = 0.034). Fewer keratic precipitates (KPs) were indicative for the need of longer treatment, and endotheliitis was strongly associated with the need for filtration surgery. CONCLUSION: In this immunocompetent southern European population, four distinct clinical presentation patterns were further confirmed, and possible biomarkers such as PS, KPs, and endotheliitis were newly reported to influence treatment outcomes. Large-scale studies could provide a more effective customized treatment protocol.

2.
Ophthalmol Ther ; 12(6): 3013-3023, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-37656400

RESUMO

INTRODUCTION: To evaluate the impacts of phacoemulsification preoperative and intraoperative factors on postoperative subfoveal choroidal thickness (SFCT). METHODS: This prospective interventional study was conducted on patients undergoing uneventful phacoemulsification with posterior chamber intraocular lens (IOL) implantation at the private clinic Ophthalmica Eye Institute, in Thessaloniki, Greece. Forty-six eyes of 46 patients were included in the study. Operative time (OT), phacoemulsification time (PT), effective phacoemulsification time (EPT) and phacoemulsification power (PP) were recorded for each patient. All patients received dexamethasone and nepafenac drops for 4 weeks postoperatively. Choroidal thickness (CT) at five anatomical locations was measured preoperatively and at 1 week, 1 month and 3 months postoperatively. RESULTS: Subfoveal choroidal thickness significantly increased over baseline thickness at 1 week postoperatively, returned to preoperative levels at 1 month and increased again at 3 months. Changes at 1 week and 3 months postoperatively correlated to baseline choroidal thickness (p = 0.023 and p = 0.011, respectively). Spherical equivalent (SE) inversely correlated to SFCT throughout the entire follow-up period (baseline p = 0.044, 1-week p = 0.011, 1-month p = 0.013, 3-month p = 0.018). EPT was the most significant determinant of increased SFCT at all time points (1-week p = 0.011, 1-month p = 0.01, 3-month p = 0.015). PT and PP significantly correlated to the SFCT increase at 3 months postoperatively (p = 0.033 and p = 0.043, respectively). OT was not associated with a change in SFCT at any time point (p > 0.05). CONCLUSION: Phacoemulsification can alter choroidal thickness until at least 3 months after surgery. Preoperative and intraoperative factors, notably SE, baseline SFCT, PT, PP and especially EPT, can influence postoperative CT increase.

4.
Drug Des Devel Ther ; 16: 2659-2680, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35971530

RESUMO

Age-related macular degeneration (AMD), diabetic retinopathy and retinal vein occlusion represent some of the commonest degenerative conditions that lead to severe vision impairment in the developed countries. The gold standard treatment of complications associated with these conditions is the intravitreal administration of anti-vascular endothelial growth factor (VEGF) agents. Brolucizumab is a newly developed, humanised, single-chain fragment of a monoclonal antibody binding all VEGF-A isoforms, which was recently approved for the treatment of neovascular AMD. Intravitreal brolucizumab promises to reduce treatment burden for nAMD patients by achieving comparable therapeutic outcomes with fewer clinic visits. Promising also appears its use for the treatment of more challenging maculopathies like diabetic macular oedema (DMO). The aim of this review is to describe the special pharmacological properties of brolucizumab and display the outcomes of the most important clinical trials and real-world studies regarding its efficacy and safety for the management of degenerative macular disorders.


Assuntos
Anticorpos Monoclonais Humanizados , Retinopatia Diabética , Degeneração Macular Exsudativa , Inibidores da Angiogênese/uso terapêutico , Anticorpos Monoclonais Humanizados/uso terapêutico , Retinopatia Diabética/tratamento farmacológico , Humanos , Injeções Intravítreas , Proteínas Recombinantes de Fusão/uso terapêutico , Fator A de Crescimento do Endotélio Vascular , Acuidade Visual , Degeneração Macular Exsudativa/tratamento farmacológico
5.
J Ophthalmol ; 2022: 9841758, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35388354
6.
J Ophthalmol ; 2022: 2161003, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35127155

RESUMO

PURPOSE: To evaluate the clinical outcome and safety profile of a new sutureless scleral fixation (SSF) technique using a single-piece foldable acrylic Carlevale intraocular lens. METHODS: In this case study, 27 eyes of 27 patients were implanted with an SSF single-piece IOL because of inadequate or absent capsular support. The hand-shake technique used during surgery was combined with the creation of scleral pockets in order to secure the IOL haptics. The BCVA was evaluated in the 1st and 6th month in every patient and in the 12th and 24th months, when possible. Also, we evaluated the improvement achieved in spherical equivalent values from baseline to the 6th month after the procedure. Intraoperative and postoperative complications were assessed. RESULTS: The mean age was 69.1 ± 14.9 years, and the mean follow-up was 13.6 ± 4.8 months. Indications of scleral-fixated IOL included dislocated posterior chamber IOL (40.7%), dislocated anterior chamber IOL (11.1%), subluxated traumatic cataract (18.5%), subluxated nontraumatic cataract (18.5%), and aphakia (11.1%). Concurrent PPV was performed on eight of the eyes (32%). The mean preoperative logMAR BCVA increased from 0.85 ± 0.59 baseline to 0.44 ± 0.30 one month after surgery (p < 0.01) and 0.36 ± 0.34 (p < 0.003) six months after surgery. The baseline refractive status expressed in SE was 4.3 ± 6.4 D, and the postoperative status was -0.5 ± 0.99 D. Postoperative complications included vitreous hemorrhage (7.4%), hypotony (7.4%), transient IOP elevation (3.7%), and postoperative cystoid macular oedema (3.7%). The IOL was very well centered and stable in every case during the follow-up period. CONCLUSION: The use of the SSF technique with implantation of a single-piece foldable acrylic Carlevale IOL seems to be a safe and effective alternative method that provides good preliminary results in cases where capsular support is inadequate or absent. Long-term stability results would be required to evaluate the benefit of this novel surgical approach in order to compare it with other existing methods.

7.
Ther Adv Ophthalmol ; 13: 25158414211059256, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34901749

RESUMO

BACKGROUND: Diabetic retinopathy is a leading cause of visual loss in the working population. Pars plana vitrectomy has become the mainstream treatment option for severe proliferative diabetic retinopathy (PDR) associated with significant vitreous haemorrhage and/or tractional retinal detachment. Despite the advances in surgical equipment, diabetic vitrectomy remains a challenging operation, requiring advanced microsurgical skills, especially in the presence of tractional retinal detachment. Preoperative intravitreal bevacizumab has been widely employed as an adjuvant to ease surgical difficulty and improve postoperative prognosis.Aims: This study aims to assess the effectiveness of preoperative intravitreal bevacizumab in reducing intraoperative complications and improving postoperative outcomes in patients undergoing vitrectomy for the complications of PDR. METHODS: A literature search was conducted using the PubMed, Cochrane, and ClinicalTrials.gov databases to identify all related studies published before 31/10/2020. Prespecified outcome measures were operation time, intraoperative iatrogenic retinal breaks, best-corrected visual acuity in the last follow-up visit, the presence of any postoperative vitreous haemorrhage and the need to re-operate. Evidence synthesis was performed using Fixed or Random Effects models, depending on the heterogeneity of the included studies. Heterogeneity was assessed using Q-statistic and I2. Additional meta-regression models, subgroup analyses and sensitivity analyses were performed as appropriate. RESULTS: Thirteen randomized control trials, with a total of 688 eyes were included in this review. Comparison of the intraoperative data showed that bevacizumab reduced operation time (p < 0.001), minimized iatrogenic retinal breaks (p < 0.001), provided better long-term visual acuity outcomes (p = 0.005), and prevented vitreous haemorrhage (p < 0.001) and the need for reoperation (p = 0.001 < 0.05). Findings were strongly corroborated by additional sensitivity and subgroup analyses. CONCLUSION: Preoperative administration of bevacizumab is effective in reducing intraoperative complications and improving the postoperative prognosis of diabetic vitrectomy.PROSPERO registration number: CRD42021219280.

8.
J Patient Exp ; 8: 23743735211065264, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34926802

RESUMO

One of the restrictive measures of COVID-19 (coronavirus disease 2019) pandemic control is the prohibition of accompanied clinic visits. The specific features of ophthalmological patients imply different degrees of dependency that directly affect their response to such measures. This study aims to assess the effects of unaccompanied medical appointments on outpatients' stress levels and their retention of medical advice. A questionnaire-based survey was conducted at a large ophthalmic clinic in northern Greece during September 2020. Suitable subjects were asked to self-administer a 7-item questionnaire addressing their subjective perception of stress and their ability to fully understand and remember their doctor's instructions, given the fact that they would be alone during the consultation. The analysis was based on 200 patients who completed the survey. Sixty-three patients (31.5%) reported that unaccompanied clinic visits increased their stress, with a median value of 7.5 (mean 6.77 ± .2.7) on a scale from 1 to 10. A large number of the patients (30%) claimed it was difficult to remember the doctor's comments or instructions, and 24.6% indicated that they would not fully understand them if they were to attend the clinic unaccompanied. A marked impact on women and on the elderly (up to threefold) over 70 years of age was identified. This is the first study specifically addressing practical repercussions of unaccompanied clinic visits during the COVID-19 pandemic. A negative effect on patients' emotional status and on counseling effectiveness was demonstrated. Female gender and advanced age were found to be determinants of the highest vulnerability.

9.
Int Ophthalmol ; 41(12): 4037-4046, 2021 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-34331185

RESUMO

PURPOSE: Contradictory evidence exists over the best approach for the management of submacular hemorrhage (SMH). In this study, we compared the outcomes of subretinal versus intravitreal injection of recombinant tissue plasminogen activator (r-tPA) and gas in cases of SMH secondary to age-related macular degeneration (AMD). METHODS: Twenty five eyes with SMH were retrospectively divided in 2 groups. Group A underwent vitrectomy, subretinal r-tPA and gas (Vitrectomy group, n = 14), and group B received intravitreal r-tPA and gas (Pneumatic group, n = 11). SMH displacement and change in subfoveal hemorrhage thickness (SFHT) at 1 month post-op were assessed. Additionally, best corrected visual acuity (BCVA) and central retinal thickness (CRT) at the end of the 12 month follow-up (FU) were analyzed. Clinical and epidemiological prognostic factors were tested. RESULTS: Mean duration of SMH prior intervention was 8.2(± 7.3) days. Baseline BCVA was 1.53 ± 0.73 LogMAR, mean extension of SMH was 4.604 ± 2079 µm and mean CRT pre-treatment was 795 ± 365 µm. SMH displacement at 1 month post-treatment was total in 9/14 versus 6/11 and partial in 4/14 versus 2/11 in Group A and Group B, respectively (Fisher's exact test p = 0.38). SFHT reduced by 404 ± 312 µm in Group A versus 376 ± 405 µm in group B (p = 0.86). BCVA improvement and reduction of CRT were highly significant at the end of FU (p = 0.002 and p < 0.001 respectively) but did not differ between the 2 groups. Only baseline BCVA and preoperative CRT proved to be significant prognostic factors for the final functional outcome (p = 0.013 and p = 0.047 respectively). CONCLUSION: Both treatment options proved equal efficacy in displacing SMH in AMD. A multicenter trial may delineate a desirable algorithm of treatment.


Assuntos
Hemorragia Retiniana , Ativador de Plasminogênio Tecidual , Degeneração Macular Exsudativa , Tamponamento Interno , Fibrinolíticos/uso terapêutico , Angiofluoresceinografia , Humanos , Injeções Intravítreas , Retina , Hemorragia Retiniana/diagnóstico , Hemorragia Retiniana/tratamento farmacológico , Hemorragia Retiniana/etiologia , Estudos Retrospectivos , Ativador de Plasminogênio Tecidual/administração & dosagem , Ativador de Plasminogênio Tecidual/uso terapêutico , Resultado do Tratamento , Acuidade Visual , Degeneração Macular Exsudativa/complicações , Degeneração Macular Exsudativa/diagnóstico , Degeneração Macular Exsudativa/tratamento farmacológico
10.
Eur J Ophthalmol ; : 11206721211020644, 2021 May 31.
Artigo em Inglês | MEDLINE | ID: mdl-34058907

RESUMO

PURPOSE: To evaluate the sensitivity of Spectral Domain Optical Coherence Tomography (SD-OCT) regarding the diagnosis of posterior vitreous detachment (PVD) in vitreomacular interface disorders (VID). METHODS: A total of 48 eyes of 48 patients were included in this prospective cohort study. PVD in eyes with VID was investigated. We determined the status of posterior vitreous cortex using slit lamp (SL) biomicroscopy and SD-OCT preoperatively, during vitrectomy and on the intraoperative video recording. Sensitivity and specificity of the examining methods were analysed. Four masked independent examiners participated in this study. RESULTS: PVD was diagnosed in 16 eyes (33.3%) on SD-OCT, 20 eyes (41.7%) on SL examination and 28 eyes (58.3%) during vitrectomy. Sensitivity and specificity for diagnosis of PVD was 37.5% and 31.3% using SD-OCT, 90% and 64.3% on the SL examination, 92.9% and 90% on the video recording respectively, compared to the intraoperative PVD diagnosis. CONCLUSION: SD-OCT shows a relatively low detection sensitivity of PVD in VID. Thorough OCT investigation is necessary to establish an appropriate diagnosis of PVD and treatment in VID.

11.
Case Rep Ophthalmol ; 12(1): 25-31, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33613247

RESUMO

Paracentral acute middle maculopathy (PAMM) is a spectral-domain OCT finding of a thickened hyperreflective band at the level of the intermediate layers of the inner retina, attributed to the acute phase of intermediate capillary ischemia. The purpose of this paper is to report a case of PAMM deriving from a surgically induced branch retinal artery occlusion (BRAO) during vitrectomy for vitreous hemorrhage. A 70-year-old female referred to the posterior segment office with a 1-month history of visual loss in her right eye. Best-corrected visual acuity (BCVA) was "counting-fingers" (CF) due to a dense vitreous hemorrhage. She underwent a standard 23-gauge vitrectomy with a relatively close to the optic disc endodiathermy application to an avulsed vessel. Follow-up examination revealed a well-demarcated retinal whitening involving the inferior macula. SD OCT showed a surgically induced branch retinal artery occlusion exhibiting both a cotton wool spot and a PAMM lesion. Our case affords an insight into those pathological processes involved with PAMM, providing angiographic evidence of the retinal ischemic changes responsible for its development, by angiographically proving that branch retinal artery occlusion leads to a prompt formation of both a cotton wool spot and a PAMM lesion. Our aim is to raise awareness of this potential complication of vitrectomy surgery, especially when involving multiple traumatic manipulations onto the retinal surface.

12.
Eur J Ophthalmol ; 31(6): 3203-3213, 2021 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-33307784

RESUMO

PURPOSE: To investigate the correlation between outer and inner retina optical coherence tomography (OCT) biomarkers and visual acuity in patients with idiopathic epiretinal membrane (iERM) and identify which of them may be predictive of visual function. METHODS: A retrospective cross-sectional single-center study was conducted that included patients diagnosed with iERM. Spectral domain OCT images were obtained and assessed qualitatively and quantitatively. The association of OCT parameters with best corrected visual acuity was analyzed. RESULTS: Charts of 97 eyes of 97 patients were reviewed. Central foveal thickness, maximal retinal thickness (MRT), photoreceptor outer segment length, outer foveal thickness, ganglion cell-inner plexiform layer complex thickening, inner retinal thickness and inner retinal layer irregularity index were among the major outcome measures. OCT scans were also assessed for the presence of cotton ball sign, ellipsoid zone disruption, ectopic inner foveal layer, disorganization of retinal inner layers (DRIL), intraretinal fluid, subretinal fluid (SRF) and epimacular membrane rip. Univariate analysis showed statistically significant association between all the aforementioned parameters with worse vision, except for cotton ball sign and SRF. Multivariate analysis found that MRT and severe DRIL were strongly correlated with worse vision (p < 0.001). CONCLUSION: MRT and severe DRIL should be considered as negative prognostic factors for visual acuity.


Assuntos
Membrana Epirretiniana , Tomografia de Coerência Óptica , Biomarcadores , Estudos Transversais , Membrana Epirretiniana/diagnóstico por imagem , Humanos , Retina , Estudos Retrospectivos , Acuidade Visual
13.
Artigo em Inglês | MEDLINE | ID: mdl-32490016

RESUMO

Epiretinal membrane (ERM) is a pathologic tissue that develops at the vitreoretinal interface. ERM is responsible for pathological changes of vision with varying degrees of clinical significance. It is either idiopathic or secondary to a wide variety of diseases such as proliferative diabetic retinopathy (PDR) and proliferative vitreoretinopathy (PVR). A great variation in the prevalence of idiopathic ERM among different ethnic groups proposed that genetic and lifestyle factors may play a role in ERM occurrence. Histopathological studies demonstrate that various cell types including retinal pigment epithelium (RPE) cells, fibrocytes, fibrous astrocytes, myofibroblast-like cells, glial cells, endothelial cells (ECs) and macrophages, as well as trophic and transcription factors, including transforming growth factor (TGF), vascular endothelial growth factor (VEGF), platelet-derived growth factor (PDGF) etc., are directly or indirectly involved in the pathogenesis of idiopathic or secondary ERMs. These processes are driven (on the last count) by more than 50 genes, such as Tumor Necrosis Factor (TNF), CCL2 (chemokine (C-C motif) ligand )), Metastasis Associated Lung Adenocarcinoma Transcript 1 )MALAT1(, transforming growth factor (TGF)-ß1, TGF-ß2, Interleukin-6 (IL-6), IL-10, VEGF and glial fibrillary acidic protein (GFAP), some of which have been studied more intensely than others. The present paper tried to summarize, highlight and cross-correlate the major findings made in the last decade on the function of these genes and their association with different types of cells, genes and gene expression products in the ERM formation.

14.
Graefes Arch Clin Exp Ophthalmol ; 258(5): 987-993, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-31925516

RESUMO

BACKGROUND: To investigate the accuracy of preoperative biometry in eyes undergoing combined phacovitrectomy and to compare it with eyes having cataract surgery at a later point in time following vitrectomy. METHODS: Patients with epiretinal membrane or macular hole who underwent combined phacovitrectomy (group 1) or phacoemulsification following pars plana vitrectomy (PPV) (group 2) were included in this retrospective, comparative, interventional case series. The primary outcome measures were the intraocular lens power prediction error (PE) and the percentage of eyes with PE > ± 0.5D in the two groups. Secondary outcome measures included the correlation between epidemiological, clinical, or surgical factors and dioptric shift. In addition, the influence of optical coherence tomography characteristics to the PE was investigated. RESULTS: Group 1 and 2 consisted of 55 and 54 eyes, respectively, for a total of 109 eyes included in the study. The mean absolute PE was 0.59 D (range + 1.4 to - 2.5D) in group 1 and 0.35 (range + 1.0 to - 1.45D) in group 2 (p = 0.01). PE greater than 0.5D was observed in 47% of eyes in group 1 as opposed to 16.6% of eyes in group 2 (p = 0.027). The PE was associated with shallower anterior chamber depth (ACD), increased central macular thickness (> 300 µ), and worse baseline best-corrected visual acuity. Photoreceptor ellipsoid zone or external limiting membrane disruption was not associated with significantly greater postoperative refractive deviations. CONCLUSION: Combined phacovitrectomy may result in greater postoperative refractive prediction error compared to phacoemulsification alone following vitrectomy. Patients with worse vision, greater central macular thickness, and shallow anterior chambers require more caution since they are prone to inaccurate preoperative biometry.


Assuntos
Membrana Epirretiniana/cirurgia , Facoemulsificação , Refração Ocular/fisiologia , Perfurações Retinianas/cirurgia , Acuidade Visual/fisiologia , Vitrectomia , Idoso , Biometria , Catarata/patologia , Membrana Epirretiniana/fisiopatologia , Feminino , Humanos , Pressão Intraocular , Implante de Lente Intraocular , Masculino , Pessoa de Meia-Idade , Período Pós-Operatório , Pseudofacia/fisiopatologia , Reprodutibilidade dos Testes , Perfurações Retinianas/fisiopatologia , Estudos Retrospectivos , Microscopia com Lâmpada de Fenda , Tomografia de Coerência Óptica
15.
Retina ; 40(8): 1549-1557, 2020 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-31584557

RESUMO

PURPOSE: To evaluate Pegasus optical coherence tomography (OCT), a clinical decision support software for the identification of features of retinal disease from macula OCT scans, across heterogenous populations involving varying patient demographics, device manufacturers, acquisition sites, and operators. METHODS: Five thousand five hundred and eighty-eight normal and anomalous macular OCT volumes (162,721 B-scans), acquired at independent centers in five countries, were processed using the software. Results were evaluated against ground truth provided by the data set owners. RESULTS: Pegasus-OCT performed with areas under the curve of the receiver operating characteristic of at least 98% for all data sets in the detection of general macular anomalies. For scans of sufficient quality, the areas under the curve of the receiver operating characteristic for general age-related macular degeneration and diabetic macular edema detection were found to be at least 99% and 98%, respectively. CONCLUSION: The ability of a clinical decision support system to cater for different populations is key to its adoption. Pegasus-OCT was shown to be able to detect age-related macular degeneration, diabetic macular edema, and general anomalies in OCT volumes acquired across multiple independent sites with high performance. Its use thus offers substantial promise, with the potential to alleviate the burden of growing demand in eye care services caused by retinal disease.


Assuntos
Retinopatia Diabética/classificação , Diagnóstico por Computador/classificação , Degeneração Macular/classificação , Edema Macular/classificação , Tomografia de Coerência Óptica/classificação , Área Sob a Curva , Tomada de Decisão Clínica , Aprendizado Profundo , Retinopatia Diabética/diagnóstico por imagem , Humanos , Degeneração Macular/diagnóstico por imagem , Edema Macular/diagnóstico por imagem , Curva ROC , Software
16.
J Ophthalmic Inflamm Infect ; 9(1): 21, 2019 Dec 23.
Artigo em Inglês | MEDLINE | ID: mdl-31873858

RESUMO

Before the introduction of optical coherence tomography angiography (OCTA) in the early 2000s, dye-based angiography was considered the "gold standard" for the diagnosis and monitoring of ocular inflammation. OCTA is a novel technique, which demonstrates capillary networks based on the amount of light returned from moving blood cells, providing further information on pathophysiological changes in uveitis.The aim of this review is to describe the basic principles of OCTA and its application to ocular inflammatory disorders. It particularly emphasizes on its contribution not only in the diagnosis and management of the disease but also in the identification of possible complications, comparing it with fundus fluorescein angiography (FFA) and indocyanine green angiography (ICGA). Although the advent of OCTA has remarkably enhanced the assessment of uveitic entities, we highlight the need for further investigation in order to better understand its application to these conditions.

17.
Adv Ther ; 36(9): 2205-2222, 2019 09.
Artigo em Inglês | MEDLINE | ID: mdl-31363996

RESUMO

INTRODUCTION: Keratoconus (KC) is a complex, genetically heterogeneous multifactorial degenerative disorder characterized by corneal ectasia and thinning. Its incidence is approximately 1/2000-1/50,000 in the general population. KC is associated with moderate to high myopia and irregular astigmatism, resulting in severe visual impairment. KC structural abnormalities primarily relate to the weakening of the corneal collagen. Their understanding is crucial and could contribute to effective management of the disease, such as with the aid of corneal cross-linking (CXL). The present article critically reviews the proteins involved in the pathophysiology of KC, with particular emphasis on the characteristics of collagen that pertain to CXL. METHODS: PubMed, MEDLINE, Google Scholar and GeneCards databases were screened for relevant articles published in English between January 2006 and June 2018. Keyword combinations of the words "keratoconus," "risk factor(s)," "genetics," "genes," "genetic association(s)," "proteins", "collagen" and "cornea'' were used. In total, 272 articles were retrieved, reviewed and selected, with greater weight placed on more recently published evidence. Based on the reviewed literature, an attempt was made to tabulate the up- and down-regulation of genes involved in KC and their protein products and to delineate the mechanisms involved in CXL. RESULTS: A total of 117 proteins and protein classes have been implicated in the pathogenesis and pathophysiology of KC. These have been tabulated in seven distinct tables according to their gene coding, their biochemistry and their metabolic control. CONCLUSION: The pathogenesis and pathophysiology of KC remain enigmatic. Emerging evidence has improved our understanding of the molecular characteristics of KC and could further improve the success rate of CXL therapies.


Assuntos
Córnea/patologia , Ceratocone/fisiopatologia , Adulto , Feminino , Humanos , Ceratocone/genética , Masculino , Fatores de Risco , Acuidade Visual
18.
Adv Ther ; 36(7): 1532-1548, 2019 07.
Artigo em Inglês | MEDLINE | ID: mdl-31102206

RESUMO

Emerging anti-vascular endothelial growth factor (anti-VEGF) therapies for neovascular age-related macular degeneration (nAMD) have revolutionised medical retina practice and the management and eventual outcome of nAMD. Recent research has focused on evaluating and comparing the efficacy of the two most widely employed anti-VEGF agents, bevacizumab and ranibizumab; however, a subgroup of patients with nAMD demonstrates a suboptimal response to standard therapy. We have therefore conducted a review of pertinent studies published until August 2018 which have documented the clinical efficacy when switching to a different anti-VEGF. Evidence on baseline disease characteristics, injection frequency and disease outcome has been obtained for patients treated with ranibizumab 0.5 mg and/or bevacizumab 1.25 mg and were switched to aflibercept 2 mg. Our review identified 45 studies investigating switching to aflibercept. Our review showed a clear anatomical benefit after the switch in terms of central retinal thickness and pigment epithelium detachment characteristics, whereas the functional outcomes were variable. Remarkable heterogeneity was documented among the relevant studies with regard to several factors including the baseline characteristics of the cohorts, the non-response definition and previous treatment protocols. Larger prospective trials with appropriate control arms are therefore required to elucidate the potential benefit when switching between anti-VEGF agents in refractory nAMD.


Assuntos
Bevacizumab/farmacologia , Substituição de Medicamentos , Degeneração Macular/tratamento farmacológico , Ranibizumab/farmacologia , Proteínas Recombinantes de Fusão/farmacologia , Idoso , Inibidores da Angiogênese/farmacologia , Substituição de Medicamentos/efeitos adversos , Substituição de Medicamentos/métodos , Humanos , Receptores de Fatores de Crescimento do Endotélio Vascular , Resultado do Tratamento
19.
Drug Des Devel Ther ; 13: 667-680, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30858697

RESUMO

Macular edema (ME) represents the most common cause for visual loss among uveitis patients. The management of uveitic macular edema (UME) may be challenging, due to its often recalcitrant nature. Corticosteroids remain the mainstay of treatment, through their capability of effectively controlling inflammation and the associated ME. Topical steroids may be effective in milder cases of UME, particularly in edema associated with anterior uveitis. Posterior sub-Tenon and orbital floor steroids, as well as intravitreal steroids often induce rapid regression of UME, although this may be followed by recurrence of the pathology. Intra-vitreal corticosteroid implants provide sustained release of steroids facilitating regression of ME with less frequent injections. Topical nonsteroidal anti-inflammatory drugs may provide a safe alternative or adjuvant therapy to topical steroids in mild UME, predominantly in cases with underlying anterior uveitis. Immunomodulators including methotrexate, mycophenolate mofetil, tacrolimus, azathioprine, and cyclosporine, as well as biologic agents, notably the anti-tumor necrosis factor-α monoclonal antibodies adalimumab and infliximab, may accomplish the control of inflammation and associated ME in refractory cases, or enable the tapering of steroids. Newer biotherapies have demonstrated promising outcomes and may be considered in persisting cases of UME.


Assuntos
Corticosteroides/uso terapêutico , Imunossupressores/uso terapêutico , Edema Macular/tratamento farmacológico , Uveíte/tratamento farmacológico , Humanos , Inflamação/tratamento farmacológico
20.
Ophthalmol Ther ; 8(1): 143-148, 2019 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-30701475

RESUMO

We report a case of severe Phoma sp. corneal infection in a middle-aged, otherwise healthy, female patient who was using a soft contact lens. This is the first time that such an infection has been reported in Greece. Our case demonstrates the clinical difficulties and management challenges presented by these recalcitrant corneal infections. Management steps included corneal grafting, vitrectomy, and intravitreal antibiotics.

SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...