Laucysteinamide A Explained

Laucysteinamide A (LcA) is a marine natural product isolated from a cyanobacterium, Caldora penicillata.[1]

It is structurally related to other marine cyanobacterial metabolites such as somocystinamide A[2] and curacin A, which have inspired extensive investigations into their use as a lead for anticancer therapies.[3] [4] [5] [6] Its biological activity profile has not been fully evaluated due to decomposition of the natural sample. However, it has shown moderate cytotoxicity against H460 human lung cancer cells.

In order to examine the possibility that LcA's true bioactivity was diminished by solubility issues, Taylor et al. chemically synthesized LcA.[7] This synthetic sample was incorporated into an emulsifier PEG400 and tested for its cytotoxicity against H460 cells. This sample did not show any more activity than the natural sample, implying that LcA only has moderate cytotoxicity. In addition, simple enamide analogs showed no activity. This work implies that the exceptional antiproliferative activity of somocystinamide A arises from the dimeric nature of its structure and not from the enamide moiety.

See also

Notes and References

  1. Zhang. Chen. Naman. C. Benjamin. Engene. Niclas. Gerwick. William H.. April 2017. Laucysteinamide A, a Hybrid PKS/NRPS Metabolite from a Saipan Cyanobacterium, cf. Caldora penicillata. Marine Drugs. en. 15. 4. 121. 10.3390/md15040121. 28420100. 5408267. free.
  2. Nogle. Lisa M.. Gerwick. William H.. 2002-04-01. Somocystinamide A, a Novel Cytotoxic Disulfide Dimer from a Fijian Marine Cyanobacterial Mixed Assemblage. Organic Letters. 4. 7. 1095–1098. 10.1021/ol017275j. 11922791. 1523-7060.
  3. Wrasidlo. Wolf. Mielgo. Ainhoa. Torres. Vicente A.. Barbero. Simone. Stoletov. Konstantin. Suyama. Takashi L.. Klemke. Richard L.. Gerwick. William H.. Carson. Dennis A.. Stupack. Dwayne G.. 2008-02-19. The marine lipopeptide somocystinamide A triggers apoptosis via caspase 8. Proceedings of the National Academy of Sciences. en. 105. 7. 2313–2318. 10.1073/pnas.0712198105. 0027-8424. 18268346. 2268133. 2008PNAS..105.2313W. free.
  4. Suyama. Takashi L.. Gerwick. William H.. 2008-10-16. Stereospecific Total Synthesis of Somocystinamide A. Organic Letters. 10. 20. 4449–4452. 10.1021/ol8016947. 1523-7060. 3227555. 18788741.
  5. Verdier-Pinard. P.. Lai. J. Y.. Yoo. H. D.. Yu. J.. Marquez. B.. Nagle. D. G.. Nambu. M.. White. J. D.. John R. Falck. Falck. J. R.. Gerwick. W. H.. Day. B. W.. January 1998. Structure-activity analysis of the interaction of curacin A, the potent colchicine site antimitotic agent, with tubulin and effects of analogs on the growth of MCF-7 breast cancer cells. Molecular Pharmacology. 53. 1. 62–76. 10.1124/mol.53.1.62. 0026-895X. 9443933.
  6. Wipf. Peter. Reeves. Jonathan T.. Day. Billy W.. 2004. Chemistry and biology of curacin A. Current Pharmaceutical Design. 10. 12. 1417–1437. 10.2174/1381612043384853. 1381-6128. 15134491.
  7. Taylor. Kimberly S.. Zhang. Chen. Glukhov. Evgenia. Gerwick. William H.. Suyama. Takashi L.. 2021-02-26. Total Synthesis of Laucysteinamide A, a Monomeric Congener of Somocystinamide A. Journal of Natural Products. 84. 3. en. 865–870. 10.1021/acs.jnatprod.0c01317. 33635664. 232065030 . 0163-3864.

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