Boosting Vincristine Levels in Lab-Grown Madagascar Periwinkle Cultures

Jim Crocker
23rd July, 2024

Boosting Vincristine Levels in Lab-Grown Madagascar Periwinkle Cultures

Callus (d, e) and subsequent cell suspension cultures (f) of Madagascar Periwinkle (Catharanthus roseus) were successfully established from excised endosperm and embryo tissues (a–c), providing the foundational mixoploid and diploid in vitro systems used to enhance vincristine production.

Image adapted from: Patil et al. / CC BY (Source)

Key Findings

  • The study by MGSM'S Dadasaheb Dr. Suresh G. Patil College explored using triploid endosperm tissue from Catharanthus roseus to enhance vincristine production
  • Endosperm-derived callus, which is mixoploid, showed higher vincristine accumulation compared to diploid embryo-derived callus
  • A biotic elicitor from Aspergillus niger significantly boosted vincristine levels in endosperm-derived cell cultures
Catharanthus roseus (L.) G. Don, commonly known as the Madagascar periwinkle, is a well-known medicinal plant, particularly valued for its production of the anti-cancer alkaloid, vincristine. Despite its therapeutic potential, the cultivation and extraction of vincristine have faced challenges, including the reliance on diploid cells, which may not be the most efficient producers. A recent study conducted by MGSM'S Dadasaheb Dr. Suresh G. Patil College aims to address this issue by exploring the use of triploid endosperm tissue in in vitro cultures to enhance vincristine production[1]. The study focused on initiating in vitro cultures from both zygotic embryos and endosperm tissues of Catharanthus roseus. The researchers used Murashige and Skoog (MS) medium, a widely recognized plant tissue culture medium, supplemented with different combinations of auxins and cytokinins. They found that the medium containing 2.50 µM 6-Benzyladenine (BA) and 1.25 µM 2,4-Dichlorophenoxyacetic acid (2,4-D) was the most effective for forming callus and cell cultures. Ploidy analysis revealed that the endosperm-derived callus exhibited a mixoploid nature, while the embryo-derived callus remained diploid. This finding is significant because triploid cells, which have three sets of chromosomes, are often more productive than diploid cells, which have two sets. This increased productivity is crucial for the sustainable production of medicinal compounds like vincristine. The study's use of endosperm tissue, which naturally tends to be triploid, opens new avenues for optimizing the yield of this valuable alkaloid. The researchers further analyzed the callus and cell cultures using Liquid Chromatography Mass Spectrometry (LC–MS) to quantify vincristine accumulation. They experimented with various combinations of auxins, cytokinins, elicitors, and precursors, both biotic and abiotic. Notably, a biotic elicitor derived from the fungus Aspergillus niger at a concentration of 300 mg/l was found to be particularly effective in promoting the maximum accumulation of vincristine in endosperm-derived callus and cell biomass. This study builds on previous research that highlights the importance of plant tissue culture as a reliable method for producing bioactive compounds, including secondary metabolites like vincristine[2]. By using in vitro cultures, researchers can bypass the limitations posed by geographical and environmental conditions, ensuring a consistent and uniform supply of medicinal compounds[3]. Moreover, the ability to manipulate and control the pathways that produce these compounds makes in vitro cultures a valuable tool for enhancing the yield and potency of medicinal plants[3][4]. The use of biotic elicitors, such as the one derived from Aspergillus niger, is a novel approach that aligns with previous findings on the use of elicitation to enhance the production of secondary metabolites in plant cultures[3]. Elicitors are substances that stimulate the production of secondary metabolites, which are compounds that plants produce in response to stress or other stimuli. By optimizing the conditions under which these metabolites are produced, researchers can significantly increase their yield. In conclusion, the study conducted by MGSM'S Dadasaheb Dr. Suresh G. Patil College offers a promising solution for the sustainable production of vincristine from Catharanthus roseus. By utilizing triploid endosperm tissue and optimizing culture conditions with effective elicitors, the researchers have demonstrated a viable method for enhancing the yield of this important anti-cancer compound. This approach not only addresses the challenges of traditional cultivation methods but also paves the way for more efficient and sustainable production of medicinal plants and their valuable compounds.

MedicineBiochemPlant Science

References

Main Study

1) Effect of abiotic and biotic elicitors on vincristine accumulation in endosperm derived in vitro cultures in Catharanthus roseous (L.) G. Don

Published 22nd July, 2024

https://doi.org/10.1007/s44372-024-00009-y

Related Studies

2) In vitro plant tissue culture: means for production of biological active compounds.

https://doi.org/10.1007/s00425-018-2910-1

3) In vitro strategies for the enhancement of secondary metabolite production in plants: a review.

https://doi.org/10.1186/s42269-022-00717-z

4) Conservation and sustainable use of medicinal plants: problems, progress, and prospects.

https://doi.org/10.1186/s13020-016-0108-7


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