研究目的
Assessing if perturbation of chemokine signaling and mononuclear cell recruitment may serve as novel complementary therapeutic targets for neovascular age-related macular degeneration (nvAMD).
研究成果
Intravitreal delivery of BKT130 inhibited monocyte recruitment, reduced CNV area, and decreased expression of proangiogenic and proinflammatory cytokines in the LI-CNV model. The study suggests that targeting monocyte recruitment via perturbation of chemokine signaling could complement anti-VEGF therapy in nvAMD.
研究不足
The LI-CNV model in rats is a wound-healing reaction that does not fully mimic the complexity of human nvAMD. The absence of a defined macula in rodents limits the model's relevance to human pathology. Additionally, the study did not demonstrate a functional effect of combined BKT130 and aflibercept therapy due to the ceiling effect of aflibercept monotherapy in the LI-CNV model.
1:Experimental Design and Method Selection:
The study utilized a laser-induced model of choroidal neovascularization (LI-CNV) in rats and an ex vivo choroidal sprouting assay (CSA) to evaluate the effects of BKT130, aflibercept, and their combination on CNV growth and monocyte recruitment.
2:Sample Selection and Data Sources:
Adult Long-Evans rats (8-12 weeks old) were used for the LI-CNV model, and blood samples were collected from nvAMD patients for the CSA.
3:List of Experimental Equipment and Materials:
Equipment included a PLI-100 Pico-Injector for intravitreal injections, a fluorescent microscope (Olympus BX41) for imaging, and a Zeiss LSM 710 confocal laser scanning system for immunofluorescence analysis. Materials included BKT130, aflibercept, and various antibodies for immunohistochemistry.
4:Experimental Procedures and Operational Workflow:
Intravitreal injections were performed at the time of laser burn injury and 5 days later. RPE-choroid flat mounts were dissected and processed for isolectin staining 10 days following the laser injury. Immunohistochemistry and QPCR were performed to assess mononuclear phagocyte recruitment and gene expression levels.
5:Data Analysis Methods:
ImageJ software was used for CNV area quantification and CD11b+ cell counting. QPCR data were analyzed using the 2(-ΔΔCT) method.
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