Artemisia annua
What's the taxonomical classification of Artemisia annua?
Artemisia annua belongs to the kingdom Plantae and is classified within the phylum Streptophyta. Moving through its hierarchical lineage, the plant is situated in the class Equisetopsida and the subclass Magnoliidae. It further belongs to the order Asterales and is a member of the family Asteraceae. Finally, its specific taxonomic placement is defined by the genus Artemisia and the species annua.
| Taxonomic Rank | Classification |
|---|---|
| Kingdom | Plantae |
| Phylum | Streptophyta |
| Class | Equisetopsida |
| Subclass | Magnoliidae |
| Order | Asterales |
| Family | Asteraceae |
| Genus | Artemisia |
| Species | annua |
What are the morphological characteristics of this plant?
Artemisia annua has an erect, annual herbaceous structure characterized by slender, branching stems that typically reach heights of 30 to 100 centimeters. The leaves are highly dissected and pinnately divided into narrow, linear segments, often appearing feathery or lace-like in texture. These leaves are arranged alternately along the stem and possess a distinctively aromatic quality due to essential oil glands. Small, inconspicuous flowers are produced in many-flowered, terminal panicles that lack petals and appear yellowish or greenish. The overall plant morphology presents a delicate, bushy appearance with a light green coloration.
What is the geographical distribution of this plant?
This plant is native to temperate regions of Europe, Asia, and North Africa but has become widely naturalized across much of the globe including North America and parts of South America. It thrives in various climates ranging from subtropical to temperate zones where soil moisture is sufficient. Because it is highly adaptable, it frequently colonizes disturbed areas such as roadsides, fields, and waste grounds. Its ability to spread rapidly allows it to establish presence in diverse ecosystems across both hemispheres. This widespread distribution is a primary reason for its global availability for medicinal and agricultural use.
How is this plant cultivated?
This plant is cultivated by sowing seeds in well-drained, fertile soil in temperate or subtropical climates where it requires full sunlight and consistent moisture.
Farmers typically plant the seeds in early spring to ensure a long growing season before the first frost. Because the plant is an annual, it must be replanted every year to maintain a continuous harvest of its leaves. Regular irrigation and controlled nitrogen levels are essential to maximize the yield of artemisinin, the medicinal compound found within the foliage.
Once the plants reach maturity, they are harvested and dried carefully to preserve their chemical potency.
What parts of this plant are used medicinally?
This plant is primarily utilized for its medicinal properties through its aerial parts, specifically the leaves and flowers. The leaves contain the highest concentration of artemisinin, which is the essential compound used to treat malaria. While the flowers are often included in herbal preparations, they are less potent than the foliage. The seeds and roots are generally not used for therapeutic purposes in standard medicinal applications. Consequently, most pharmaceutical extractions focus on the biomass found above the ground.
According to a study published by "Natural product research", the aerial part of Artemisia annua was used to isolate the new sesquiterpenoid derivative Artemiannua A (1) and the new natural compound artemiannua B (2). Along with these two new compounds, six known compounds (3-8) were also isolated from the plant. The anti-inflammatory activities of compounds 1-8 were evaluated using the Griess assay in LPS-induced RAW264.7 macrophages. Within this evaluation, compounds 1, 2, 5, and 6 markedly reduced NO generation. Additionally, the MTT technique was employed to evaluate the hepatoprotective properties of compounds 1-8 against liver damage caused by acetaminophen.
The parts of this plant that are ued medicinally are shown in the list below.
- aerial part
- leaves
- flowers
- seeds
- roots
What traditional systems uses this plant?
This plant, known as sweet wormwood, has been a cornerstone of traditional Chinese medicine for over two thousand years to treat various ailments. Ancient practitioners primarily utilized the dried leaves of the plant to manage symptoms of malaria, fevers, and digestive issues. Historical texts such as the Zhouhou Beiji Fang describe specific methods for preparing the herb to ensure its efficacy. Beyond its role in treating malaria, it was often incorporated into topical applications and herbal infusions for its cooling properties. These long-standing traditional practices eventually provided the foundational knowledge necessary for the modern scientific isolation of artemisinin.
According to a study published by "Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica", the concept of geo-herbals has been formed by the history of Chinese civilization for thousands of years. Within this historical context, Artemisia annua is subject to differences in quality and efficacy across different regions. The spatial distribution of artemisinic acid content in Artemisia annua is influenced by environmental factors in a specific order: soil type (0.233), radiation (0.208), vegetation type (0.192), elevation (0.171), sunshine (0.170), annual mean temperature (0.153), annual precipitation (0.111), slope (0.110), and relative humidity. The main influencing area involves soil type and an average annual radiation of 1 200-1 400 kWh•m⁻². These factors provide a theoretical basis for the cultivation of Artemisia annua.
The hystorical systems that uses this plant are shown in the list below.
- Chinese medicine
What are the pharmacological activities of Artemisia annua?
This plant has significant pharmacological activities including potent anti-malarial, anti-parasitic, antiprotozoal, antiviral, and anti-inflammatory properties. The most well-known attribute is its ability to combat malaria through the production of artemisinin, which effectively targets Plasmodium falciparum. Beyond its impact on malaria, the plant exhibits broad antiprotozoal and anti-parasitic effects that can disrupt various single-celled organisms. Research also indicates that its chemical constituents possess antiviral capabilities that may help inhibit certain viral replications. Furthermore, the plant demonstrates anti-inflammatory actions by modulating immune responses and reducing swelling in biological systems.
According to a study published by "Frontiers in plant science", Artemisia annua produces artemisinin, which is a sesquiterpene lactone widely used in anti-malaria treatment. The artemisinin content in Artemisia annua is low and difficult to meet market demands. The biosynthesis of artemisinin in Artemisia annua has complex temporal and spatial specificity and is under tightly transcriptional regulation. Two MYC-type bHLH transcription factors, identified as AabHLH2 and AabHLH3, act as transcription repressors to negatively regulate artemisinin biosynthesis. These two proteins function redundantly to regulate the production of this metabolite in the plant.
The primary pharmacological activities of this plant are shown in the list below.
- anti-malarial
- anti-parasitic
- anti-plasmodial
- antiviral
- anti-inflammatory
What medicinal compounds this plant contains?
This plant contains several medicinal compounds, most notably the potent antimalarial agent artemisinin, along with artemisinic acid, dihydroartemisinin, arteannuic acid, and arteannuin B. Artemisinin serves as the primary active ingredient used in global efforts to combat malaria infections. Dihydroartemisinin is a significant derivative that often exhibits even higher potency in clinical applications. The plant also produces artemisinic acid and arteannuic acid, which contribute to its complex chemical profile. Additionally, the presence of arteannuin B adds to the diverse range of secondary metabolites found within its leaves.
According to a study published by "Molecules (Basel, Switzerland)", the plant Artemisia annua L. contains the sesquiterpene lactone known as artemisinin. This compound is renowned for its antimalarial activity and has been used to obtain various derivatives and analogues. In experimental evaluations, artemisinin exhibited a stimulating effect on SH-SY5Y and HEK-293 cells. It specifically enhanced the survival of primary neurons when applied at low concentrations of 1 µM. Furthermore, artemisinin demonstrated a protective effect against endoplasmic reticulum stress induced by the proteasome inhibitor MG132 in SH-SY5Y cells.
The primary medicinal compounds of this plant are shown in the list below.
- Artemisinin
- Dihydroartemisinin
- Artemisinic acid
- Arteannuin B
- Artemisinic aldehyde
What health conditions is this plant used for?
This plant is used for treating malaria caused by the Plasmodium falciparum parasite, including cases of severe malaria and cerebral malaria. The artemisinin extracted from its leaves serves as the foundation for modern life-saving antimalarial therapies. It is particularly vital in combating multi-drug resistant malaria where other traditional medicines have failed. Doctors rely on these derivatives to reduce parasite density rapidly in the bloodstream. This botanical source remains a critical component in managing the most life-threatening complications of the disease.
According to a study published by "Mini reviews in medicinal chemistry", Artemisia annua provides the plant-derived medicine known as artemisinin. This medicine is used as part of antimalarial pharmacotherapy to treat malaria, a tropical disease that puts more than 40% of the world population at risk. Malaria is endemic to more than 100 nations and is a leading cause of death in children less than five years of age. The review highlights studies on terpenes and their semi synthetic derivatives reported in the literature during eleven years from 2002 to 2013. A total of 114 compounds are found among these terpenes and their derivatives.
The main health conditions this plant is used for are shown in the list below.
- Malaria
- Plasmodium falciparum
- Severe malaria
- Multi-drug resistant malaria
- Chloroquine-resistant malaria
What are the herbal preparations of this plant?
This plant is used to create various medicinal herbal preparations including a 70% ethanol extract, Toujie Quwen Granules, compressed leaf tablets, yinhuang langxiao granule, and herbal tea. The 70% ethanol extract is frequently utilized in laboratory settings to isolate artemisinin for pharmaceutical research. Traditional Chinese medicine practitioners often prescribe Toujie Quwen Granules and yinhuang langxiao granule to address specific febrile illnesses and inflammatory conditions. For more accessible administration, compressed leaf tablets provide a standardized dose of the plant's active constituents. Patients may also consume the plant as a simple herbal tea to utilize its natural properties in a mild form.
According to a study published by "Phytomedicine : international journal of phytotherapy and phytopharmacology", Artemisia Annua L is one of the 16 medicinal materials included in the Toujie Quwen Granules. The Chinese medicine-compound-target network analyzed for these granules contains 111 compounds and 298 targets. Within this network, the top 34 compounds were docked with the SARS-CoV-2 3CL enzyme and the SARS-CoV-2 RNA-dependent RNA polymerase (RdRp). Furthermore, 13 compounds with the lowest affinity score were docked with ACE2, the SARS-CoV-2 Spike protein, and interleukin 6. These studies aim to reveal how the components in the granules may provide therapeutic effects for COVID-19.
The main herbal preparations of this plant are shown in the list below.
- 70% ethanol extract
- Toujie Quwen Granules
- compressed leaf tablets
- yinhuang langxiao granule
- herbal tea
What side effects this plant can have?
This plant can cause significant health complications including cytotoxicity, allergic symptoms, hepatotoxicity, neurotoxicity, and proteotoxic stress. Exposure to its chemical constituents may lead to cellular damage through mechanisms of cytotoxicity that disrupt normal biological functions. Some individuals may experience various allergic symptoms such as skin rashes or respiratory irritation upon contact or ingestion. High doses or prolonged use are linked to hepatotoxicity, which indicates potential liver injury, and neurotoxicity affecting the nervous system. Furthermore, the plant can induce proteotoxic stress by causing the accumulation of misfolded proteins within cells.
According to a study published by "Metabolism open", the flavonoid extracted from Artemisia annua (FAA) displayed remarkable antioxidant activities with low IC50/EC50 values ranging from 3.85 to 19.32 μg/mL. When tested at 10 μg/mL, FAA significantly (p<0.05) preserved cell viability and inhibited damage induced by APAP (11 mM) or CCl4 (4 mM). Unlike the semi-synthesized molecule ART, FAA effectively protects liver cells without any cytotoxicity effect even at 100 μg/mL. While ART provides relative protection at low concentrations, it showed a significant (p<0.05) cytotoxic effect on hepatocytes at concentrations of 100 and 1000 μg/mL. Consequently, the data suggests that ART harms mice hepatocytes at high concentrations.
The main side effects this plant can have are shown in the list below.
- cytotoxicity
- allergic symptoms
- hepatotoxicity
- neurotoxicity
- proteotoxic stress
What herbs are paired with Artemisia annua?
This plant, commonly known as sweet wormwood, is frequently paired with ginger, peppermint, or lemon balm to balance its intense bitterness and enhance its therapeutic properties.
Adding ginger can provide a warming effect that complements the plant's cooling nature, while peppermint offers a refreshing scent that masks the pungent aroma. Lemon balm is often included in herbal blends to provide a gentle sedative quality that works alongside the plant's potent alkaloids. These combinations are often formulated in teas or tinctures to improve the overall palatability of the bitter extracts.
Such pairings allow herbalists to tailor the functional benefits of the blend to specific wellness needs.