The invention discloses a novel medicinal application of
fucoidan polysaccharide sulfate. The application refers to the application of
fucoidan polysaccharide sulfate in the preparation of the following products: 1), a product for preventing and / or treating
diabetic retinopathy, 2), a product for inhibiting
retinal new capillaries, 3), a product for inhibiting VEGF (
vascular endothelial growth factor)
protein expression of
retina tissue, and 4), a product for inhibiting HIF-1 alpha (hypoxia inducible factor-1 alpha))
protein expression of
retina tissue. Preferably, the
fucoidan polysaccharide sulfate is LMWF with the weight-average molecular weight of 3KD to 30KD. The pharmacodynamic experiment proves that the LMWF has a function in improving the
retinopathy of STZ (streptozocin) induced
diabetes mellitus mouse; under the function, the function of the
retina capillaries is improved and the
ischemia and anoxic state in retina are improved, therefore the down-regulation of expression of VEGF and HIF-1alpha are related; because the molecular weight of the LMWF is relatively small, the fucoidan polysaccharide sulfate can be adsorbed after being taken orally, the
side effect is less, and therefore, the fucoidan polysaccharide sulfate has latent application significance in preventing and treating
retinopathy.