View clinical trials related to Neovascularization, Pathologic.
Filter by:The cross-sectional observational clinical study related to rare eye diseases is a multi-center study in which the hypothesis is that neurokinin 1 receptor and/or substance P expression is increased in REDs associated with inflammation/pain. Moreover, the following alternative targets are: VEGF, PAX6 and pro-inflammatory cytokine. The following procedures are performed specifically for the study: samples of blood, tear fluid and impression cytology. Precisely during the ophthalmological exam performed according to normal clinical practice (uncorrected visual acuity, best spectacle corrected visual acuity, corneal topography, corneal pachymetry and the slit lamp pictures) investigator's team collect the samples of blood, tear fluid and impression cytology to evaluate the goal of the study.
To Analyze the Ability of Optical Coherence Tomography Angiography ( OCT-A ) to detect the presence of myopic Choroidal Neovascularization and to describe the structural features of Myopic CNV..
Choroidal neovascularization (CNV), also known as subretinal neovascularization, is a proliferative change from choroidal capillaries that has become one of the most important causes of blindness worldwide. CNV can occur in a variety of fundus diseases, including pathologic myopia, polypoidal choroidal vasculopathy. At present, intravitreal injection of anti-vascular endothelial growth factor (VEGF) drugs is the first-line effective treatment for CNV. Although a number of clinical studies have shown that the treatment of CNV with anti-VEGF drugs has achieved good visual and anatomical effects, there are still some patients whose CNV has not decreased significantly or even progressed continuously after treatment. Rapid advances in imaging technology have made it possible to explore the quantitative and qualitative characteristics of choroid and CNV, especially swept source optical coherence tomography angiography (SS-OCTA). The objectives are to improve the OCTA typing of CNV and analyze the vascular morphological characteristics of each type; to identify the changes in vascular characteristics of CNV after anti-VEGF treatment in vitreous cavity; and to elucidate the predictive effects of neovascularization and choroidal vascular characteristics on visual acuity and anatomic effects of vitreous anti-VEGF drug treatment for CNV.
To evaluate the image quality and ability to depict in vivo bone vascularization with an ultra-high-resolution computed tomography (UHR-CT) scanner using a deep learning reconstruction (DLR) and hybrid iterative reconstruction (HIR) algorithms, compared to simulated conventional CT, using osteoid osteoma (OO) as a model.
To suggest a novel classification of choroidal neovascular membrane based on optical coherence tomography angiography and to correlate morphological characteristics based on optical coherence tomography with clinical criteria of disease activity.
Almost 85% of new therapeutic molecules are abandoned before the clinical trial stage. Most of these failures currently concern cancer therapies. In order to optimize the development of these molecules and allow the development of precision medicine, an innovative screening device that is as close as possible to in vivo is necessary. For this reason, the platform the investigators are setting up takes into account tumor vascularization as well as the 3D microenvironment. The platform the investigators intend to set up is based on 4 cornerstones: - the formation of patient-derived organoids seems to be the best option to take into account the microenvironment and cellular interactions. - the vascular network: the formation of a peri-tumoral vascular network, either by using HUVECS cells or by using endothelial cells from the patient. - the extracellular matrix, and the set of proteins it contains, is a major element of in vivo interaction. Moreover, the presence of a matrix is a key element for the development of vascularization in vitro. - Functional tumor microenvironment: peri-tumor vascularization is necessary but not sufficient to claim to recreate a tumor microenvironment. It must be functionalized, and this implies the use of a microfluidic system. This ready-to-use platform will be used on tumor biopsies of the patient, to constitute a tool for personalized medicine. This could even be a future component of decision at multidisciplinary board meetings. The main objective of our research is the constitution of organoids derived from the patient in order to select, via a screening device, the best anti-tumor therapy to administer to the patient. A secondary objective is to collect lymphocytes from the patient's blood in order to test the effectiveness of therapies mediated by the immune system (immunotherapy).
Retinal imaging is a corner stone in diagnosis of most retinal disorders. Standard imaging techniques e.g. fluorescein angiography and color fundus photography have a lot of limitations including limited resolution, invasive nature in cases of fluorescein angiography, and inability to segment the retina, accordingly, and only 2D image is provided. Optical coherence tomography angiography (OCTA) is a recent noninvasive imaging technique that allows for volumetric visualization of eye vasculature. OCTA has shown promise in better elucidating the pathophysiology of several retinal vascular diseases. Swept-source OCTA uses long wavelength ̰ 1,050nm, which can penetrate through deeper layers of the eye and can traverse opacities of media such as cataracts, hemorrhages and vitreous opacities. Optical coherence tomographic angiograms can further be manually or automatically segmented with preprogrammed software to highlight individual layers of the retina, optic nerve head choriocapillaris, and choroid. The user can either analyze en face images extending from the inner limiting membrane to choroid or use automated views to locate a vascular or structural lesion within the retina. Different quantitative metrics has been extracted from enface OCTA images including vessel density, FAZ area, choriocapillaries flow deficit, intercapillary area and fractal dimension. These metrics are helpful in evaluation the retinal perfusion and used by physicians to assess various retinal vascular disorders. Although some previous literatures had discussed the repeatability of OCTA metrics, however, comprehensive evaluation of widely used metrics in various retinal condition has not be done. Additionally, recent data suggest that various methods of calculation of these metrics my yield final different results of the same metric.
The aim of the study is to find biomarkers in the blood and aqueous humor of patients with type 1 choroidal neovascularization and correlate them with the response to anti-VEGF treatment.
All participants will underwent imaging using the OCTA system (Zeiss) with the anterior segment optical adaptor lens. The main outcomes are iris blood flow density and vascular density.
The primary objective of this trial is to investigate whether intramuscular administration of allogeneic mesenchymal stromal cells (MSC) is safe and potentially effective, assessed as a composite outcome of mortality, limb status, clinical status (Rutherford classification) and pain score (visual analogue scale), in patients with no-option severe limb ischemia (SLI). The investigators will conduct a double-blind, placebo-controlled randomized clinical trial to investigate the effect of allogeneic bone marrow(BM)-derived MSC in patients with SLI, who are not eligible for conventional surgical or endovascular therapies. The investigators intend to include 60 patients, who will be randomized to undergo 30 intramuscular injections with either BM-MSC (30 injection sites with 5*10^6 MSCs each) or placebo in the lower leg of the ischemic extremity. Primary outcome i.e. therapy success, a composite outcome considering mortality, limb status, clinical status (Rutherford classification) and changes in pain score, will be assessed at six months.