Cited by 108Plant biochemistry and biosynthesisPlant tissue culture and regenerationTransgenic Plants and Applications

Over-expression of HMG-CoA reductase and amorpha-4,11-diene synthase genes in Artemisia annua L. and its influence on artemisinin content

Alam, Pravej, Abdin, M. Z.·2011·Plant Cell Reports

Abstract

Artemisinin, an endoperoxide sesquiterpene lactone, is a novel antimalarial natural product isolated from Artemisia annua L. plants. The low concentrations (0.01-1.1%) of this compound in A. annua L. plants is, however, a major constraint for commercialization of artemisinin-based combination therapies (ACTs) recommended by WHO for treating malaria caused by multidrug-resistant P. falciparum sp. In this context, in vivo yield improvement programs were undertaken by us. In the present study, HMG-Co A reductase gene (hmgr) from Catharanthus roseus (L) G. Don and amorpha-4,11-diene synthase (ads) gene from A. annua L. were over-expressed in A. annua L. plants to study their effects on artemisinin yields. The transgenic lines developed from putative transgenic regenerants were evaluated for integration and copy number of the transgenes using hptII gene probe, as it was a part of the expression cassette. The transgenic lines showed positive bands of hptII gene on Southern blots confirming the integration of transgenes. Some of the transgenic lines had single copy of the transgenes, while others had multiple copies. The expressions of hmgr and ads at the transcriptional level were also confirmed in each transgenic line employing RT-PCR assays. The HPLC analyses showed that the artemisinin contents were significantly increased in these transgenics. One of the transgenic lines, TR4, was found to contain 7.65-fold higher (1.73 mg/gDW) artemisinin than the non-transgenic plant (W). The increased artemisinin levels were found to be correlated with HMG-Co A reductase and amorpha-4,11-diene synthase enzymatic activities in the biochemical analyses.

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Crossref · 10.1007/s00299-011-1099-6

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Authors
Alam, P., & Abdin, M. Z.
Affiliations
Jamia Hamdard (IN)
Corresponding author
Abdin, M. Z.
Venue
Plant Cell Reports
Published
2011-06-08
Volume
30
Issue
10
Pages
1919-1928
ISSN
  • 0721-7714 (ISSN-L)
  • 1432-203X
OpenAlex
W2152038789
Cited by
108
References
51
Citations by year
2026: 3 · 2025: 8 · 2024: 7 · 2023: 5 · 2022: 8 · 2021: 4 · 2020: 6 · 2019: 5 · 2018: 7 · 2017: 11 · 2016: 10 · 2015: 11 · 2014: 8 · 2013: 7 · 2012: 6
FWCI
2.99
Type
journal article
Language
en
Open access
closed
Locations
  • Plant Cell Reports (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Department of Science and Technology, Ministry of Science and Technology, India
  • Institute of Psychology, Chinese Academy of Sciences
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Plant biochemistry and biosynthesis
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Plant tissue culture and regeneration
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biotechnology › Transgenic Plants and Applications
Keywords
artemisinin, Artemisia annua, HMG-CoA reductase, amorpha-4,11-diene synthase, transgenic plants, gene overexpression, sesquiterpene lactone biosynthesis, transgene integration, transgene copy number, Catharanthus roseus
MeSH terms
Genetic Engineering, Hydroxymethylglutaryl CoA Reductases, Plant Proteins, Transformation, Genetic, Gene Expression Regulation, Plant, Gene Dosage, Transgenes, Alkyl and Aryl Transferases, Plants, Genetically Modified, Artemisia annua, Artemisinins

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