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Analysis of soluble angiogenic factors in Crohn's disease: a preliminary study
Inés Dueñas Pousa1, José Maté Jiménez, Xamila Salcedo Mora
1Department of Gastroenterology and Hepatology, Hospital of La Princesa, Autonomous University of Madrid, Spain.
Insights
Crohns disease (CD) patients exhibit an activated pro-angiogenic profile with altered serum levels of vascular endothelial growth factor (VEGF) and other angiogenic factors compared to healthy individuals.
Area of Science:
- Gastroenterology and Immunology
- Molecular Biology
- Biochemistry
Background:
- Inflammation and angiogenesis are implicated in the pathogenesis of Crohns disease (CD).
- Soluble angiogenic factors may be dysregulated in CD patients.
- Understanding these factors is crucial for disease management.
Purpose of the Study:
- To investigate serum levels of key angiogenic factors and their receptors in CD patients.
- To compare these levels between CD patients and healthy controls.
- To explore potential correlations between angiogenic profiles and CD phenotypes.
Main Methods:
- Serum samples were collected from 30 CD patients and 30 healthy controls.
- Enzyme-linked immunosorbent assay (ELISA) was used to quantify serum levels of vascular endothelial growth factor (VEGF), placental growth factor (PlGF), angiopoietins (Ang1, Ang2), and their receptors (VEGFR1, VEGFR2, Tie2).
- CD patients were subgrouped by phenotype: inflammatory, fibrostenotic, and fistulizing.
Main Results:
- CD patients showed significantly higher serum levels of VEGF, PlGF, VEGFR1, Ang2, and Tie2 compared to controls.
- CD patients had significantly lower serum levels of Ang1 than controls.
- VEGFR2 levels did not differ between groups. Fibrostenotic CD was associated with elevated VEGF and Ang2, while inflammatory CD showed elevated Tie2 and PlGF.
Conclusions:
- CD patients present an activated pro-angiogenic profile characterized by altered serum levels of soluble angiogenesis markers.
- Specific angiogenic factor profiles correlate with distinct CD phenotypic behaviors.
- These findings highlight the role of angiogenesis in CD pathogenesis and suggest potential biomarkers for disease stratification.
Aims:
Soluble angiogenic factors could be altered in patients with Crohns disease (CD), since inflammation and angiogenesis may play a critical pathogenic role.
Methods:
Serum samples were collected from 30 patients with CD (50% female; median age 44 +/- 14 yrs) grouped according to their phenotypic behavior into equal subgroups: inflammatory, fibrostenotic and fistulizing; and 30 healthy controls (50% female; median age 43 +/- 14 yrs). Vascular endothelial growth factor (VEGF), placental growth factor (PlGF), angiopoietins (Ang) and receptors (VEGFR1, VEGFR2 and Tie2) in sera were assayed by ELISA.
Results:
Serum levels of VEGF (494 +/- 247 pg/ml), PlGF (36 +/- 11 pg/ml), VEGFR1 (1.9 +/- 0.3 ng/ml), Ang2 (6.0 +/- 2.3 ng/ml) and Tie2 (36 +/- 5 ng/ml) in CD patients were significantly higher than those found in healthy controls (335 +/- 118 pg/ml; 23 +/- 9 pg/ml; 1.0 +/- 0.3 ng/ml; 3.9 +/- 2.0 ng/ml; 22 +/- 7 ng/ml, respectively). Conversely, CD patients showed significantly lower serum levels of Ang1 than healthy controls (46 +/- 11 versus 67 +/- 23 pg/ml). In the case of VEGFR2 serum levels, no differences between groups were found. Finally, patients with fibrostenotic CD were characterized by elevated VEGF and Ang2 levels, while patients with an inflammatory phenotype by elevated Tie2 and PlGF levels.
Conclusions:
An activated "pro-angiogenic" profile of angiogenesis soluble markers was observed in CD patients, in comparison with healthy controls. According to the phenotypic behavior, these patients showed differences in serum levels of angiogenic factors.
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