Cuantificación de eritropoyetina y somatostatina intravítrea: estudio comparativo entre pacientes con diabetes mellitus y trombosis venosa retiniana
PURPOSE: To determine the levels of somatostatin (SST) and Erythropoietin (EPO) in the vitreous fluid of patients with diabetic macular edema (DME), proliferative diabetic retinopathy (PDR), macular edema secondary to retinal vein occlusion (RVO) and controls subjects. METHODS: Vitreous, serum and plasma samples were obtained from patients with macular edema secondary to RVO, DME, PDR, idiopathic epiretinal membrane, macular hole and rhegmatogenous retinal detachment (controls). EPO and SST were measured by radioimmunoassay (RIA). RESULTS: No differences were found between the groups in serum EPO levels. (Serum concentrations: RVO: 8.9 mU/mL [7-20.8]; DME: 12.4 mU/mL[7.8-46.7]; PDR: 9,33 mU/mL [3-16]; controls: 8.6 mU/mL [4.1-19], P=ns). No differences were found in intravitreal EPO levels between patients with RVO and controls. (Intravitreal concentrations: RVO: 69 mU/mL [27-800] vs. controls: 50 mU/mL [13-107], P=0,095). No differences were found in intravitreal EPO levels between patients with RDP and DME (Intravitreal concentrations: DPR: 528,74 mU/mL [156-1859] vs. DME: 578,63 mU/mL [41-2780], P=0,833). Intravitreal EPO concentration was significantly higher in patients with DME and RDP than in patients with RVO or controls (P<0,05). No differences were found in intravitreal SST levels between patients with RVO and controls (Intravitreal concentrations: RVO: 715,8 pg/mL [49-1367] vs. controls: 735,26 pg/mL [102-2024] P=0,973). No differences were found in intravitreal SST levels between patients with PDR and DME (Intravitreal concentrations: PDR: 119,59 pg/mL [14-377] vs. EMD: 88,97 pg/mL [21-232]P=0,601).Intravitreal SST concentration was significantly higher in patients with RVO and controls than in patients with DME and PDR (p<0,05). CONCLUSIONS: Intravitreal SST levels are elevated in patients with macular edema secondary to RVO and control subjects compared to patients with DME and PDR. Intravitreal EPO levels are not elevated in patients with macular edema secondary to RVO compared to control subjects whereas patients with DME and PDR have high levels of this factor in the vitreous. These results suggest that EPO and SST could be involved in the pathogenesis of diabetic retinopathy but not in macular edema secondary to RVO.
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Advisor:García-Arumí, José; Fonollosa Calduch, Àlex
School:Universitat Autónoma de Barcelona
Source Type:Master's Thesis
Keywords:417 departament de medicina
Date of Publication:05/13/2008