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. 1987 Oct;31(10):1524–1528. doi: 10.1128/aac.31.10.1524

Purification and characterization of an avian myeloblastosis and human immunodeficiency virus reverse transcriptase inhibitor, sulfated polysaccharides extracted from sea algae.

H Nakashima 1, Y Kido 1, N Kobayashi 1, Y Motoki 1, M Neushul 1, N Yamamoto 1
PMCID: PMC174983  PMID: 2449120

Abstract

A new reverse transcriptase (RT) inhibitor was extracted and purified from the red alga Schizymenia pacifica. The chromatographic behavior and chemical properties of this sea algal extract (SAE) suggest that it is a sulfated polysaccharide having a molecular weight of approximately 2,000,000. SAE is composed of galactose (73%), sulfonate (20%), and 3,6-anhydrogalactose (0.65%). SAE is a member of the lambda-carrageenan family, based on its infrared spectrum and products of hydrolysis. SAE selectively inhibited human immunodeficiency virus (HIV) RT and replication in vitro. When MT-4 cells were treated with more than 10(4) inhibitory units (IU) of SAE per ml after HIV infection, significant inhibition of viral antigen synthesis was observed. Furthermore, more than 90% of cells were viable in the cultures exposed to 4 X 10(4) to 8 X 10(4) IU of SAE per ml, while almost all the MT-4 cells in the control culture had died by 10 days after HIV infection. The inhibitory effect of SAE on HIV replication was confirmed by plaque reduction assays. The 50% inhibitory dose of SAE was 9.5 x 10(3) IU/ml. Chondroitin sulfate A, dermatan sulfate, heparan sulfate, keratan polysulfate, and heparin also inhibited the RT of avian myeloblastosis virus. SAE immediately inhibited RT activity when added to an assay mixture after the start of the reaction.

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Selected References

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