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Articles by Vinit B. Mahajan in JoVE

 JoVE Clinical and Translational Medicine

Препарирование прав Стекловидное Элементы орган для анализа протеомных


JoVE 2455 1/23/2011

Department of Ophthalmology and Visual Sciences, Omics Laboratory, University of Iowa

Это видео показывает эффективную технику для дифференциации и рассекает различные полупрозрачные структуры стекловидного тела человека после смерти в глаза.

 JoVE General

Evisceration стекловидного тела и сетчатки мышь для протеомных Анализы


JoVE 2795 4/03/2011

1Omics Laboratory, University of Iowa, 2Ophthalmology and Visual Sciences, University of Iowa, 3Harkness Eye Institute, Columbia University College of Physicians and Surgeons

Рассечение техника иллюстрирует потрошения стекловидного тела, сетчатки и объектив от мыши глаз, разделение центрифугированием, и характеристика с белком анализов.

 JoVE Clinical and Translational Medicine

Мышь глаз Энуклеация для удаленного высокой пропускной Фенотипирование


JoVE 3184 11/19/2011

1Department of Ophthalmology and Visual Sciences, University of Iowa, 2Omics Laboratory, University of Iowa, 3School of Dentistry, UCLA, 4Bernard and Shirlee Brown Glaucoma Laboratory, Department of Ophthalmology, College of Physicians and Surgeons, Columbia University

Техника рассечения иллюстрирует энуклеации глаза мыши для фиксации тканей для выполнения фенотипирование в высокой пропускной способности экранов.

 JoVE Clinical and Translational Medicine

Субретинальной инъекция генной терапии векторы и стволовых клеток в мышь глаз


JoVE 4286 11/25/2012

1Bernard and Shirlee Brown Glaucoma Laboratory, Department of Ophthalmology, Columbia University, 2Institute of Human Nutrition, College of Physicians & Surgeons, Columbia University, 3Omics Laboratory, University of Iowa, 4Department of Ophthalmology and Visual Sciences, University of Iowa

Этот хирургический метод иллюстрирует введение генной терапии векторы и стволовых клеток в субретинальной пространство мыши глаз.

Other articles by Vinit B. Mahajan on PubMed

Microarray Analysis of Corneal Fibroblast Gene Expression After Interleukin-1 Treatment

To identify changes in gene expression in human corneal fibroblasts after exposure to interleukin-1alpha.

Tissue-specific Gene Expression of Head and Neck Squamous Cell Carcinoma in Vivo by Complementary DNA Microarray Analysis

To identify distinct gene expression profiles of human head and neck squamous cell carcinomas (HNSCCAs) using complementary DNA (cDNA) microarray analysis and to create a preliminary, comprehensive database of HNSCCA gene expression.

Estrogen Receptor Alpha and Matrix Metalloproteinase 2 Polymorphisms and Age-related Maculopathy in Older Women

In this study, the authors sought to determine whether single nucleotide polymorphisms in the estrogen receptor alpha (ESR1) and matrix metalloproteinase 2 (MMP2) genes are associated with age-related maculopathy (ARM) in older women. Subjects comprised a random sample of Caucasian women aged > or =74 years participating in the Study of Osteoporotic Fractures year 10 follow-up (n = 906) in 1997-1998. Fundus photographs were graded for ARM using a modification of the Wisconsin Age-Related Maculopathy Grading System. The prevalences of early ARM and late ARM were 46% and 4%, respectively. The MMP2 rs2287074 single nucleotide polymorphism (G-->A) was associated with ARM. The A allele was present in 47%, 43%, and 30% of subjects with no, early, and late ARM, respectively (p = 0.01), and was associated with lower odds of any ARM (for AG vs. GG, odds ratio = 0.80, 95% confidence interval: 0.65, 0.99; for AA vs. GG, odds ratio = 0.64, 95% confidence interval: 0.42, 0.98). An interaction with use of postmenopausal hormone therapy was significant (p = 0.02). The MMP2 rs2287074 A allele may be associated with a lower likelihood of ARM in older Caucasian women, particularly those who have never used hormone therapy. The role of MMP2 rs2287074 in ARM should be further elucidated.

A Head-tilt Test for Hypopyon After Intravitreal Triamcinolone

Management of Sympathetic Ophthalmia with the Fluocinolone Acetonide Implant

We examined whether implantation of the fluocinolone acetonide (Retisert) implant achieved control of inflammation and a reduced need for oral corticosteroids or immunosuppressives in patients with sympathetic ophthalmia (SO).

A New Macular Dystrophy with Anomalous Vascular Development, Pigment Spots, Cystic Spaces, and Neovascularization

To clinically phenotype an inherited macular dystrophy with peculiar intraretinal pigment spots, cysts, and hemorrhage in a 24-year-old female proband and her family.

Erythropoetin Receptor Expression in the Human Diabetic Retina

Recent evidence suggests erythropoietin (EPO) and the erythropoietin receptor (EPOR) may play a direct role in the pathogenesis of diabetic retinopathy. Better characterization of the EPO-EPOR signaling system in the ischemic retina may offer a new therapeutic modality for ischemic ophthalmic diseases. This study was performed to identify EPOR mRNA expression in the human diabetic eye.

Effects of Vitrectomy on Age-related Macular Degeneration

To determine whether vitrectomy alters the long-term progression of age-related macular degeneration (AMD).

Automated Early Detection of Diabetic Retinopathy

To compare the performance of automated diabetic retinopathy (DR) detection, using the algorithm that won the 2009 Retinopathy Online Challenge Competition in 2009, the Challenge2009, against that of the one currently used in EyeCheck, a large computer-aided early DR detection project.

T-cell Infiltration in Autosomal Dominant Neovascular Inflammatory Vitreoretinopathy

Autosomal dominant neovascular inflammatory vitreoretinopathy (ADNIV) is a familial blinding disease of unknown pathophysiology. The eyes and sera from patients with ADNIV were studied to understand the immune response in this condition.

Patients with an Acute Zonal Occult Outer Retinopathy-like Illness Rapidly Improve with Valacyclovir Treatment

To describe 3 cases of an acute zonal occult outer retinopathy-like illness responsive to valacyclovir hydrochloride.

Collagen XVIII Mutation in Knobloch Syndrome with Acute Lymphoblastic Leukemia

Knobloch syndrome (KNO) is caused by mutations in the collagen XVIII gene (COL18A1) and patients develop encephalocele and vitreoretinal degeneration. Here, we report an El Salvadorian family where two sisters showed features of KNO. One of the siblings also developed acute lymphoblastic leukemia. DNA sequencing of COL18A1 revealed a homozygous, 2-bp deletion (c3514-3515delCT) in exon 41, which leads to abnormal collagen XVIII and deficiency of its proteolytic cleavage product endostatin. KNO patients with mutations in COL18A1 may be at risk for endostatin-related conditions including malignancy.

Intravitreal Bevacizumab During Pregnancy

To report the clinical course of four women treated with intravitreal bevacizumab during pregnancy.

Bilateral Intravitreal Injection of Antivascular Endothelial Growth Factor Therapy

The purpose of this study was to review adverse events and patient preference after bilateral intravitreal injection of antibodies to vascular endothelial growth factor.

Intraoperative Choroidal Detachment During 23-gauge Vitrectomy

To review intraoperative choroidal detachments during 23-gauge vitrectomy and examine possible mechanism(s) involved.

Mutations in Prickle Orthologs Cause Seizures in Flies, Mice, and Humans

Epilepsy is heritable, yet few causative gene mutations have been identified, and thus far no human epilepsy gene mutations have been found to produce seizures in invertebrates. Here we show that mutations in prickle genes are associated with seizures in humans, mice, and flies. We identified human epilepsy patients with heterozygous mutations in either PRICKLE1 or PRICKLE2. In overexpression assays in zebrafish, prickle mutations resulted in aberrant prickle function. A seizure phenotype was present in the Prickle1-null mutant mouse, two Prickle1 point mutant (missense and nonsense) mice, and a Prickle2-null mutant mouse. Drosophila with prickle mutations displayed seizures that were responsive to anti-epileptic medication, and homozygous mutant embryos showed neuronal defects. These results suggest that prickle mutations have caused seizures throughout evolution.

Seroreactivity Against Aqueous-soluble and Detergent-soluble Retinal Proteins in Posterior Uveitis

To characterize the seroreactivity against retinal proteins in patients with posterior uveitis, retinal disease of noninflammatory origin, and healthy controls.

Sutureless Triplanar Sclerotomy for 23-gauge Vitrectomy

To describe and test the intraoperative integrity of triplanar sclerotomies.

Intravitreal Bevacizumab for Treatment of Proliferative and Nonproliferative Type 2 Idiopathic Macular Telangiectasia

To determine the effect of treatment with intravitreal bevacizumab on retinal thickness and visual acuity in the nonproliferative and proliferative forms of Type 2 idiopathic macular telangiectasia.

Uveitis Following Intravitreal Bevacizumab: a Non-infectious Cluster

In this retrospective case series, the authors report seven cases of bevacizumab-related uveitis that occurred within a 4-month period.

Automated Discovery and Quantification of Image-based Complex Phenotypes: a Twin Study of Drusen Phenotypes in Age-related Macular Degeneration

Determining the relationships between phenotype and genotype of many disorders can improve clinical diagnoses, identify disease mechanisms, and enhance therapy. Most genetic disorders result from interaction of many genes that obscure the discovery of such relationships. The hypothesis for this study was that image analysis has the potential to enable formalized discovery of new visible phenotypes. It was tested in twins affected with age-related macular degeneration (AMD).

Correspondence

Infrared Imaging and Optical Coherence Tomography Reveal Early-Stage Astrocytic Hamartomas Not Detectable by Fundoscopy

PURPOSE: To describe and correlate the features of astrocytic hamartomas using multimodal imaging. DESIGN: Prospective, noncomparative, observational case series. METHODS: This was a single-center study of 4 patients (8 eyes) with tuberous sclerosis complex. A complete ophthalmologic examination, fundus photography, fundus autofluorescence (FAF), infrared imaging, and spectral-domain optical coherence tomography (SD-OCT) were performed for each patient. Images from each modality were analyzed and compared. RESULTS: In 2 patients, infrared imaging and SD-OCT detected occult retinal astrocytic hamartomas that were not observed on clinical examination or color fundus photography. FAF demonstrated the greatest contrast between lesions and surrounding retina but failed to identify 1 occult lesion that was detected with infrared imaging and SD-OCT. SD-OCT revealed lesions arising from the retinal nerve fiber layer with overlying vitreous adhesions, hyperreflective dots, and optically empty spaces at all depths of the tumor. Hamartomas were hyporeflective on infrared imaging and hypoautofluorescent on FAF. FAF of some lesions demonstrated hyperautofluorescent spots. CONCLUSIONS: Infrared imaging and SD-OCT aid in the detection of astrocytic hamartomas that are not visible on clinical examination or color fundus photography. SD-OCT enhances visualization of structural details. FAF is a useful adjunctive test to obtain greater contrast between lesions and surrounding retina. The ability to monitor structural changes over time in astrocytic hamartomas using SD-OCT may be beneficial for monitoring the success of systemic chemotherapy in the treatment of various tuberous sclerosis tumors.

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