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Current Bioactive Compounds

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ISSN (Print): 1573-4072
ISSN (Online): 1875-6646

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Research Article

In vitro Anti-HIV and Antimicrobial Activities of a Halogenated Monoterpene from a Namibian Plocamium Species of Marine Algae

Author(s): Aina N. Shiyanga, Michael Knott and Petrina Kapewangolo*

Volume 16, Issue 3, 2020

Page: [363 - 367] Pages: 5

DOI: 10.2174/1573407215666190111153845

Price: $65

Abstract

Background: The marine red alga Plocamium naturally produces halogenated monoterpenes with varied biological activities. In our continuing efforts to discover new lead compounds for the treatment of HIV/AIDS as well as novel antibacterial compounds, various Namibian Plocamium species have been investigated.

Methods: A rare but known compound namely 1E,3R,4S,5E,7Z-1-bromo-3,4,8-trichloro-7- (dichloromethyl)-3-methylocta-1,5,7-triene (1) was isolated from a Namibian Plocamium red alga. The anti-HIV activity of compound 1 was investigated against three HIV enzymes namely, HIV protease, reverse transcriptase and integrase. In addition, compound 1 was also screened for antibacterial activity against selected microbes using the disc diffusion method.

Results: Compound 1 demonstrated selective in vitro inhibition against HIV-1 integrase with a 50% inhibition concentration of <0.06 mM. Weak inhibitory activity was observed against HIV-1 reverse transcriptase and protease. Compound 1 also showed antibacterial activity against Staphylococcus aureus (ATCC 25923), Alcaligenes faecalis (ATCC 8750) and Serratia marcescens (ATCC 8100) with MIC values of 0.65 mM, and 1.29 mM for Klebsiella pneumonia (ATCC 13883).

Conclusion: The results of this study highlight the potential of halogenated monoterpenes from red seaweed as possible leads in the development of new anti-HIV and antimicrobial pharmaceuticals.

Keywords: Plocamium, anti-HIV, antimicrobial, HIV enzymes, monoterpenes, hexane.

Graphical Abstract

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