Anonaine

Anonaine is a bioactive benzylisoquinoline alkaloid, present in members of the plant families Magnoliaceae and Annonaceae[1] It is named after the plant it was first extracted from, Annona reticulata, which is commonly known as Anona.[2]

Anonaine
Names
Systematic IUPAC name
(7aR)-6,7,7a,8-Tetrahydro-5H-[1,3]benzodioxolo[6,5,4-de]benzo[g]quinoline
Identifiers
3D model (JSmol)
ChemSpider
Properties
C17H15NO2
Molar mass 265.312 g·mol−1
Melting point 122–123 °C (252–253 °F; 395–396 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Extraction from Annonaceae

The alkaloid was first isolated from the bark of the Annona reticulata. It has since been found in Annona squamosa, the leaves of Michelia × alba, Fissistigma latifolium and Goniothalamus australis, among many others.[1] The compound may be obtained by dry roasting the bark of Annona reticulata and extracting with methanol. The methanol is removed and the resulting syrup is then treated with hydrochloric acid and the insoluble salts filtered off. The filtrate can then made basic with NH4OH and extracted with diethyl ether. Shaking the extract with 5% sodium hydroxide and retaining the organic layer removes the phenolic content of the extract. The hydrogen chloride salt is then obtained by mixing with hydrochloric acid and recrystallized from diethyl ether. The free base can then be obtained.[2] The anonaine content of Annona reticulata is approximately 0.12%, based on the weight of the starting dried bark.[3]

Research

Traditional medicines

Anonaine is found in many species of Annonacae, which have been used as traditional medicines for many years. For example, extracts of Annona squamosa have been used as treatments for epilepsy, dysentery, cardiac problems, worm infection, constipation, bacterial infection, fever and ulcers. It appears, however, that anonaine is not active in the treatment of many of these ailments.[4] Studies into the bioactivity of anonaine have revealed various interesting pharmacological activities including antitumour, vasorelaxation, antioxidative, antiparasitic and antimicrobial effects, as well as having an effect on the central nervous system.[1]

Anti-tumour properties

Anonaine is known to inhibit growth in human cervical cancer[5] and human lung carcinoma H1299 cells in vitro.[6] The mechanism by which anonaine induces apoptosis in these cells is believed to occur by several mechanisms: generation of nitric oxide and reactive oxygen species, reduction in intracellular glutathione concentration, activation of caspases and apoptosis-related proteins, and damage to DNA.

See also

References
  1. Li, HT; Wu, HM; Chen, HL; Liu, CM; Chen, CY (2013). "The pharmacological activities of (−)-anonaine". Molecules (Basel, Switzerland). 18 (7): 8257–63. doi:10.3390/molecules18078257. PMC 6270643. PMID 23857128.
  2. Santos, A. C. (1930). "Alkaloid from Anona reticulata L.". Philippine Journal of Science. 43 (4): 561–564.
  3. Barger, G.; Weitnauer, G. (1939). "Konstitution und Synthese des Alkaloids Anonain". Helvetica Chimica Acta (in German). 22 (1): 1036–1047. doi:10.1002/hlca.193902201131.
  4. Srivastava, S.; Lal, V. K.; Pant, K. K. (2011). "Medicinal potential of Annona squamosa: At a glance". Journal of Pharmacy Research. 4 (12): 4596–4598.
  5. Chen, Chung-Yi; Liu, Tsan-Zon; Tseng, Wei-Chang; Lu, Fung-Jou; Hung, Ray-Ping; Chen, Chi-Hung; Chen, Ching-Hsein (August 2008). "(−)-Anonaine induces apoptosis through Bax- and caspase-dependent pathways in human cervical cancer (HeLa) cells". Food and Chemical Toxicology. 46 (8): 2694–2702. doi:10.1016/j.fct.2008.04.024. PMID 18524447.
  6. Chen, Bing-Hung; Chang, Hsueh-Wei; Huang, Hsuan-Min; Chong, Inn-Wen; Chen, Jia-Shing; Chen, Chung-Yi; Wang, Hui-Min (23 March 2011). "(−)-Anonaine Induces DNA Damage and Inhibits Growth and Migration of Human Lung Carcinoma H1299 Cells". Journal of Agricultural and Food Chemistry. 59 (6): 2284–2290. doi:10.1021/jf103488j. PMID 21361287.
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