Huperzine alkaloids from Australasian and southeast Asian Huperzia
Lim, Wei-Han, Goodger, Jason Q.D., Field, Ashley R., Holtum, Joseph A.M., and Woodrow, Ian E. (2010) Huperzine alkaloids from Australasian and southeast Asian Huperzia. Pharmaceutical Biology, 48 (9). pp. 1073-1078.
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Context: The pharmaceutical alkaloid huperzine A (HupA), currently used in herbal supplements and medicines worldwide, is predominantly sourced from the Chinese lycopod Huperzia serrata (Thunb. ex Murray) Trev. (Lycopodiaceae), which on average contains only 0.08mg HupA g−1 dry weight, and is experiencing a rapid decline in China due to over-harvesting.
Objective: To find a high-yielding, natural source of HupA and/or the related huperzine B (HupB) that could potentially be used as the starting material in a commercial propagation program.
Materials and methods: We surveyed 17 Huperzia species (15 indigenous to Australia and southeast Asia) for their foliar HupA and HupB concentrations. We also studied intra-specific variation for the huperzines in four species that were available in sufficient numbers, and determined tissue-specific accumulation in larger specimens.
Results: HupA was detected in 11 Australasian and southeast Asian species, with eight also containing HupB, albeit at much lower concentrations. A H. elmeri (Herter) Holub plant from the Philippines had one of the highest HupA concentrations recorded (1.01mg g−1 dry wt) and it also had the highest HupB content of all plants surveyed (0.34mg g−1 dry wt). Intra-specific HupA and HupB concentrations were extremely variable, and at the intra-plant level, reproductive strobili were found to accumulate the highest HupA concentrations.
Discussion and conclusion: Select Huperzia species from Australia and southeast Asia have potential as the starting material for establishing commercial HupA plantations, but the high intra-specific variability observed suggests that detailed screening is needed to isolate high huperzine-yielding individuals.
|Item Type:||Article (Refereed Research - C1)|
|Keywords:||acetylcholine esterase, Alzheimer’s disease, huperzine A, huperzine B, lycopod|
|FoR Codes:||06 BIOLOGICAL SCIENCES > 0607 Plant Biology > 060702 Plant Cell and Molecular Biology @ 35%|
06 BIOLOGICAL SCIENCES > 0607 Plant Biology > 060705 Plant Physiology @ 30%
03 CHEMICAL SCIENCES > 0304 Medicinal and Biomolecular Chemistry > 030401 Biologically Active Molecules @ 35%
|SEO Codes:||97 EXPANDING KNOWLEDGE > 970106 Expanding Knowledge in the Biological Sciences @ 100%|
|Deposited On:||11 Jan 2011 13:10|
|Last Modified:||18 Oct 2013 01:10|
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