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Published in: Graefe's Archive for Clinical and Experimental Ophthalmology 12/2022

13-09-2022 | Anticoagulant | Basic Science

New anti-angiogenic compound based on chemically modified heparin

Authors: Vinicius Kniggendorf, Maria Eduarda Perrud Souza, Thatiane Russo, Marcelo Andrade de Lima, Alex Treiger Grupenmacher, Caio V. Regatieri, Juliana L. Dreyfuss

Published in: Graefe's Archive for Clinical and Experimental Ophthalmology | Issue 12/2022

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Abstract

Purpose

The purpose of this study was to measure the anti-angiogenic effect of N-desulfated Re–N-acetylated, a chemically modified heparin (mHep).

Methods

In vitro assays (cell tube formation, viability, proliferation, and migration) with endothelial cells were performed after 24 h of treatment with mHep at 10, 100, and 1000 ng/mL or saline. In vivo tests were performed after laser-induced choroidal neovascularization (CNV) in rats, followed by an intravitreal injection (5 µL) of mHep (10, 100, 1000 ng/mL) or balanced salt solution. Immunofluorescence analysis of the CNV was performed after 14 days.

Results

mHep produced a statistically significant reduction in cell proliferation, tube formation, and migration, without cell viability changes when compared to saline. Mean measures of CNV area were 54.84 × 106 pixels/mm (± 12.41 × 106), 58.77 × 106 pixels/mm (± 17.52 × 106), and 59.42 × 106 pixels/mm (± 17.33 × 106) in groups 100, 1000, and 10,000 ng/mL, respectively, while in the control group, mean area was 72.23 × 106 (± 16.51 × 106). The P value was 0.0065. Perimeter analysis also demonstrated statistical significance (P = 0.0235) with the mean measure of 93.55 × 104, 94.23 × 104, and 102 × 104 in the 100 ng/mL, 1000 ng/mL, and control groups, respectively.

Conclusions

These results suggest that mHep N-DRN is a potent anti‐angiogenic, anti‐proliferative, and anti-migratory compound with negligible anticoagulant or hemorrhagic action and no cytotoxicity for retina cells. This compound may serve as a candidate for treating choroidal neovascularization.
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Metadata
Title
New anti-angiogenic compound based on chemically modified heparin
Authors
Vinicius Kniggendorf
Maria Eduarda Perrud Souza
Thatiane Russo
Marcelo Andrade de Lima
Alex Treiger Grupenmacher
Caio V. Regatieri
Juliana L. Dreyfuss
Publication date
13-09-2022
Publisher
Springer Berlin Heidelberg
Published in
Graefe's Archive for Clinical and Experimental Ophthalmology / Issue 12/2022
Print ISSN: 0721-832X
Electronic ISSN: 1435-702X
DOI
https://doi.org/10.1007/s00417-022-05828-x

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