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Infraspecific Variation of Huperzine A and B in Icelandic Huperzia selago Complex

Infraspecific Variation of Huperzine A and B in Icelandic Huperzia selago Complex

Title: Infraspecific Variation of Huperzine A and B in Icelandic Huperzia selago Complex
Author: Xu, Maonian   orcid.org/0000-0002-4346-8020
Heiðmarsson, Starri   orcid.org/0000-0003-0329-6882
Thorsteinsdóttir, Margrét   orcid.org/0000-0002-0649-8503
Wasowicz, Pawel   orcid.org/0000-0002-6864-6786
Sun, Hang
Deng, Tao
Omarsdottir, Sesselja   orcid.org/0000-0003-1824-5148
Olafsdottir, Elin Soffia   orcid.org/0000-0001-7305-7129
Date: 2018-10-05
Language: English
Scope: 160-168
University/Institute: Háskóli Íslands
University of Iceland
School: Heilbrigðisvísindasvið (HÍ)
School of Health Sciences (UI)
Department: Lyfjafræðideild (HÍ)
Faculty of Pharmaceutical Sciences (UI)
Series: Planta Medica;85(02)
ISSN: 0032-0943
1439-0221 (eISSN)
DOI: 10.1055/a-0752-0295
Subject: Lycopodiaceae; Huperzia; Huperzine A; Huperzine B; Phylogeny; Lyfjafræði; Lyfjaefnafræði; Lyfjagerð; Alzheimer sjúkdómur
URI: https://hdl.handle.net/20.500.11815/1022

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Xu, M., Heidmarsson, S., Thorsteinsdottir, M., Wasowicz, P., Sun, H., Deng, T., . . . Olafsdottir, E. S. (2019). Infraspecific Variation of Huperzine A and B in Icelandic Huperzia selago Complex. Planta Med, 85(02), 160-168. doi:10.1055/a-0752-0295


The alkaloids huperzine A and huperzine B were originally isolated from the Chinese club moss Huperzia serrata. They are known inhibitors of acetylcholinesterase, and especially huperzine A shows pharmaceutical potential for the treatment of Alzheimerʼs disease. Its supply heavily relies on natural plant sources belonging to the genus Huperzia, which shows considerable interspecific huperzine A variations. Furthermore, taxonomic controversy remains in this genus, particularly in the Huperzia selago group. With focus on Icelandic H. selago taxa, we aimed to explore the relatedness of Huperzia species using multi-locus phylogenetic analysis, and to investigate correlations between huperzine A contents, morphotypes, and genotypes. Phylogenetic analysis was performed with five chloroplastic loci (the intergenic spacer between the photosystem II protein D1 gene and the tRNA-His gene, maturase K, ribulose-1,5-bisphosphate carboxylase/oxygenase large subunit, tRNA-Leu, and the intergenic spacer region between tRNA-Leu and tRNA-Phe). Huperzine A and huperzine B contents were determined using an HPLC-UV method. The phylogenetic analysis suggests that previously proposed Huperzia appressa and Huperzia arctica should not be considered species, but rather subspecies of H. selago. Three genotypes of Icelandic H. selago were identified and presented in a haplotype networking diagram. A significantly (p < 0.05) higher amount of huperzine A was found in H. selago genotype 3 (264 – 679 µg/g) than genotype 1 (20 – 180 µg/g), where the former shows a typical green and reflexed “selago” morphotype. The huperzine A content in genotype 3 is comparable to Chinese H. serrata and a good alternative huperzine A source. Genotype 2 contains multiple morphotypes with a broad huperzine A content (113 – 599 µg/g). The content of huperzine B in Icelandic taxa (6 – 13 µg/g) is much lower than that in Chinese H. serrata (79 – 207 µg/g).


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