Ocular immunology and inflammation · 2020
Mycobacterium Tuberculosis Modulates Fibroblast Growth Factor and Vascular Endothelial Growth Factor in Ocular Tuberculosis.
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Singh Nirbhai, Singh Ravinder, Sharma Ravi Kumar, Kumar Aman, Sharma Surya Prakash, Agarwal Aniruddha, Gupta Vishali, Singh Ramandeep, Katoch Deeksha
Аннотация
Purpose: To evaluate the role of angiogenic growth factors in the pathogenesis of intraocular tuberculosis.Methods: Retinal Pigment Epithelium (RPE) cells were infected with varying dilution of Mycobacterium tuberculosis (MTB), ranging from several thousand to a few MTB bacilli to replicate paucibacillary conditions. Angiogenesis growth factors were evaluated using multiplex fluorescent bead based flow cytometry in the culture supernatant of RPE cells infected with MTB, vitreous fluids and tear samples of uveitis patients visiting retina clinic.Results: Vascular endothelial growth factor (VEGF) levels were elevated and fibroblast growth factors (FGFs) were down regulated in RPE-infected MTB cells. Similar pattern of VEGF and FGF was observed in the vitreous of IOTB patients. However, no changes were observed in tear samples.Conclusions: MTB exploits the angiogenesis growth factors for pathogenesis by decreasing FGF with concomitant surge of VEGF in MTB infected RPE as well in the vitreous of IOTB patients.