Tasco®: a Product of Ascophyllum Nodosum Enhances Immune Response of Caenorhabditis Elegans Against Pseudomonas Aeruginosa Infection

Overview

Journal Mar Drugs

Publisher MDPI

Specialties Biology
Pharmacology

Date 2012 Feb 25

PMID 22363222

Citations 13

Authors

Saveetha Kandasamy

Wajahatullah Khan

Franklin Evans

Alan T Critchley

Balakrishnan Prithiviraj

Affiliations

Soon will be listed here.

Abstract

The effects of Tasco®, a product made from the brown seaweed (Ascophyllum nodosum) were tested for the ability to protect Caenorhabditis elegans against Pseudomonas aeruginosa infection. A water extract of Tasco® (TWE) reduced P. aeruginosa inflicted mortality in the nematode. The TWE, at a concentration of 300 µg/mL, offered the maximum protection and induced the expression of innate immune response genes viz.; zk6.7 (Lypases), lys-1 (Lysozyme), spp-1 (Saponin like protein), f28d1.3 (Thaumatin like protein), t20g5.7 (Matridin SK domain protein), abf-1 (Antibacterial protein) and f38a1.5 (Lectin family protein). Further, TWE treatment also affected a number of virulence components of the P. aeuroginosa and reduced its secreted virulence factors such as lipase, proteases and toxic metabolites; hydrogen cyanide and pyocyanin. Decreased virulence factors were associated with a significant reduction in expression of regulatory genes involved in quorum sensing, lasI, lasR, rhlI and rhlR. In conclusion, the TWE-treatment protected the C. elegans against P. aeruginosa infection by a combination of effects on the innate immunity of the worms and direct effects on the bacterial quorum sensing and virulence factors.

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