» Articles » PMID: 34641567

Semisynthetic Derivatives of Selected Amaryllidaceae Alkaloids As a New Class of Antimycobacterial Agents

Abstract

The search for novel antimycobacterial drugs is a matter of urgency, since tuberculosis is still one of the top ten causes of death from a single infectious agent, killing more than 1.4 million people worldwide each year. Nine Amaryllidaceae alkaloids (AAs) of various structural types have been screened for their antimycobacterial activity. Unfortunately, all were considered inactive, and thus a pilot series of aromatic esters of galanthamine, 3--methylpancracine, vittatine and maritidine were synthesized to increase biological activity. The semisynthetic derivatives of AAs were screened for their in vitro antimycobacterial activity against H37Ra and two other mycobacterial strains (, ) using a modified Microplate Alamar Blue Assay. The most active compounds were also studied for their in vitro hepatotoxicity on the hepatocellular carcinoma cell line HepG2. In general, the derivatization of the original AAs was associated with a significant increase in antimycobacterial activity. Several pilot derivatives were identified as compounds with micromolar MICs against H37Ra. Two derivatives of galanthamine, and , were selected for further structure optimalization to increase the selectivity index.

Citing Articles

Investigation of the antimycobacterial activity of African medicinal plants combined with chemometric analysis to identify potential leads.

Moyo P, Ofori M, Bodede O, Wooding M, Khorommbi N, McGaw L Sci Rep. 2024; 14(1):14660.

PMID: 38918410 PMC: 11199645. DOI: 10.1038/s41598-024-65369-7.


Alkaloids of (Papaveraceae) and Berberine Derivatives as a New Class of Antimycobacterial Agents.

Wijaya V, Jandourek O, Kroustkova J, Hradiska-Breiterova K, Korabecny J, Sobolova K Biomolecules. 2022; 12(6).

PMID: 35740968 PMC: 9221290. DOI: 10.3390/biom12060844.

References
1.
Newman D, Cragg G . Natural Products as Sources of New Drugs from 1981 to 2014. J Nat Prod. 2016; 79(3):629-61. DOI: 10.1021/acs.jnatprod.5b01055. View

2.
Piccaro G, Poce G, Biava M, Giannoni F, Fattorini L . Activity of lipophilic and hydrophilic drugs against dormant and replicating Mycobacterium tuberculosis. J Antibiot (Tokyo). 2015; 68(11):711-4. DOI: 10.1038/ja.2015.52. View

3.
Heinrich M, Lee Teoh H . Galanthamine from snowdrop--the development of a modern drug against Alzheimer's disease from local Caucasian knowledge. J Ethnopharmacol. 2004; 92(2-3):147-62. DOI: 10.1016/j.jep.2004.02.012. View

4.
Okunade A, Elvin-Lewis M, Lewis W . Natural antimycobacterial metabolites: current status. Phytochemistry. 2004; 65(8):1017-32. DOI: 10.1016/j.phytochem.2004.02.013. View

5.
Marikova J, Ritomska A, Korabecny J, Perinova R, Al Mamun A, Kucera T . Aromatic Esters of the Crinane Amaryllidaceae Alkaloid Ambelline as Selective Inhibitors of Butyrylcholinesterase. J Nat Prod. 2020; 83(5):1359-1367. DOI: 10.1021/acs.jnatprod.9b00561. View