Pharmacological potential of sulfated polygalactopyranosyl-fucopyranan from the brown seaweed Sargassum wightii

Pharmacological potential of sulfated polygalactopyranosyl-fucopyranan from the brown seaweed... A sulfated polygalactopyranosyl-fucopyranan characterized as ∙∙∙∙ → 1)-α-Fucp-(2SO3 −)-(3 → 1)-α-Fucp-(2SO3 −)-(4 → 1)-β-Galp-(4 → 1)-β-Galp-(4 → ∙∙∙∙ was isolated from the brown seaweed Sargassum wightii and evaluated for pharmacological properties with reference to antioxidant, anti-inflammatory, antidiabetic, and antihypertensive activities using different in vitro models. The sulfated polygalactopyranosyl-fucopyranan displayed potential di(phenyl)-(2,4,6-trinitrophenyl) iminoazanium (DPPH), 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS+) radical scavenging, and Fe2+ ion chelating activities (IC90 ~ 1 mg mL−1). The studied polysaccharide displayed higher anti-inflammatory selectivity towards inducive pro-inflammatory enzyme cyclooxygenase-2 (COX-2, IC90 1.13 mg mL−1) than constitutive cyclooxygenase-1 (COX-1, IC90 > 1.20 mg mL−1) resulting in greater selectivity index (IC90 COX-2/COX-1, 0.93) than synthetic non-steroidal anti-inflammatory drug aspirin (0.88) and also showed potent lipoxygenase-5 inhibition (LOX-5, IC90 1.02 mg mL−1). The studied polysaccharide displayed significantly higher (P < 0.05) antidiabetic properties compared to the antidiabetic agents acarbose and diprotein-A in terms of α-amylase (IC90 0.93 mg mL−1), α-glucosidase (IC90 1.48 mg mL−1), and dipeptidyl peptidase-4 (IC90 0.11 mg mL−1) enzyme inhibition potentials. The sulfated polygalactopyranosyl-fucopyranan also displayed potential antihypertensive activity with reference to angiotensin-converting enzyme-I inhibitory activity (IC90 0.2 mg mL−1). Extensive spectroscopic experiments in conjugation with monosaccharide compositional analysis attributed (1 → 3)-linked α-fucopyranose units in the polygalactofucan chain with C-2 sulfation and C-4 substituents as O-acetyl/O-methyl/(1 → 4)-linked β-galactopyranose. The previously undescribed sulfated polygalactopyranosyl-fucopyranan could function as a potential pharmacophore lead against inflammation, type 2 diabetics, hypertension and utilization as natural antioxidant. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Applied Phycology Springer Journals

Pharmacological potential of sulfated polygalactopyranosyl-fucopyranan from the brown seaweed Sargassum wightii

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Publisher
Springer Netherlands
Copyright
Copyright © 2018 by Springer Science+Business Media B.V., part of Springer Nature
Subject
Life Sciences; Plant Sciences; Freshwater & Marine Ecology; Plant Physiology; Ecology
ISSN
0921-8971
eISSN
1573-5176
D.O.I.
10.1007/s10811-017-1385-y
Publisher site
See Article on Publisher Site

Abstract

A sulfated polygalactopyranosyl-fucopyranan characterized as ∙∙∙∙ → 1)-α-Fucp-(2SO3 −)-(3 → 1)-α-Fucp-(2SO3 −)-(4 → 1)-β-Galp-(4 → 1)-β-Galp-(4 → ∙∙∙∙ was isolated from the brown seaweed Sargassum wightii and evaluated for pharmacological properties with reference to antioxidant, anti-inflammatory, antidiabetic, and antihypertensive activities using different in vitro models. The sulfated polygalactopyranosyl-fucopyranan displayed potential di(phenyl)-(2,4,6-trinitrophenyl) iminoazanium (DPPH), 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS+) radical scavenging, and Fe2+ ion chelating activities (IC90 ~ 1 mg mL−1). The studied polysaccharide displayed higher anti-inflammatory selectivity towards inducive pro-inflammatory enzyme cyclooxygenase-2 (COX-2, IC90 1.13 mg mL−1) than constitutive cyclooxygenase-1 (COX-1, IC90 > 1.20 mg mL−1) resulting in greater selectivity index (IC90 COX-2/COX-1, 0.93) than synthetic non-steroidal anti-inflammatory drug aspirin (0.88) and also showed potent lipoxygenase-5 inhibition (LOX-5, IC90 1.02 mg mL−1). The studied polysaccharide displayed significantly higher (P < 0.05) antidiabetic properties compared to the antidiabetic agents acarbose and diprotein-A in terms of α-amylase (IC90 0.93 mg mL−1), α-glucosidase (IC90 1.48 mg mL−1), and dipeptidyl peptidase-4 (IC90 0.11 mg mL−1) enzyme inhibition potentials. The sulfated polygalactopyranosyl-fucopyranan also displayed potential antihypertensive activity with reference to angiotensin-converting enzyme-I inhibitory activity (IC90 0.2 mg mL−1). Extensive spectroscopic experiments in conjugation with monosaccharide compositional analysis attributed (1 → 3)-linked α-fucopyranose units in the polygalactofucan chain with C-2 sulfation and C-4 substituents as O-acetyl/O-methyl/(1 → 4)-linked β-galactopyranose. The previously undescribed sulfated polygalactopyranosyl-fucopyranan could function as a potential pharmacophore lead against inflammation, type 2 diabetics, hypertension and utilization as natural antioxidant.

Journal

Journal of Applied PhycologySpringer Journals

Published: Jan 26, 2018

References

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