Peganum harmala
What's the taxonomical classification of Peganum harmala?
Peganum harmala belongs to the kingdom Plantae and is classified within the phylum Streptophyta. Its taxonomic hierarchy continues through the class Equisetopsida and the subclass Magnoliidae, placing it under the order Sapindales. Within this order, it is a member of the family Nitrariaceae. Finally, its specific classification is defined by the genus Peganum and the species harmala.
| Taxonomic Rank | Classification |
|---|---|
| Kingdom | Plantae |
| Phylum | Streptophyta |
| Class | Equisetopsida |
| Subclass | Magnoliidae |
| Order | Sapindales |
| Family | Nitrariaceae |
| Genus | Peganum |
| Species | harmala |
What are the morphological characteristics of this plant?
Peganum harmala has an herbaceous, perennial structure characterized by erect, branched stems that typically reach heights of 30 to 50 centimeters. The leaves are arranged in an alternate pattern along the stem and are divided into narrow, linear segments. Small, white, five-petaled flowers emerge from the leaf axils during the blooming season. The plant produces distinctive capsule-shaped fruits that contain numerous small, dark seeds. Its root system is robust and serves as a primary storage organ for the plant.
What is the geographical distribution of this plant?
This plant is native to a broad region spanning the Mediterranean Basin, North Africa, the Middle East, and parts of Central Asia. It thrives in arid and semi-arid climates where it is frequently found in dry, stony soils or disturbed areas. Its range extends from the Iberian Peninsula in the west through Turkey and Iran toward the borders of India and China in the east. Many populations have also been introduced to other warm, dry regions around the world through human cultivation and accidental dispersal. The species demonstrates a high level of adaptability to various desert-like environments across these diverse territories.
What parts of this plant are used medicinally?
Peganum harmala contains medicinal alkaloids primarily located within its dried seeds, though the aerial parts such as leaves and stems are also utilized. The seeds are the most potent component, serving as the primary source of harmala alkaloids used for their psychoactive and antioxidant properties. These alkaloids are frequently extracted to create traditional remedies for various ailments including digestive issues and respiratory conditions. Additionally, the leaves can be processed into decoctions or infusions for topical or internal applications in folk medicine. Researchers continue to study these specific plant parts to understand their potential roles in treating neurological and inflammatory disorders.
What are the pharmacological activities of Peganum harmala?
This plant has potent pharmacological activities including monoamine oxidase A (MAO-A) inhibition, anti-inflammatory, antioxidant, neuroprotective, and antimicrobial properties. Its primary alkaloids act as reversible inhibitors of the MAO-A enzyme, which significantly affects neurotransmitter levels in the brain. The presence of various bioactive compounds allows the plant to combat oxidative stress and reduce systemic inflammation. These combined effects contribute to its ability to provide neuroprotection against various neurodegenerative processes. Additionally, the plant exhibits significant antimicrobial capabilities against a wide range of pathogenic microorganisms.
According to a study published by "Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association", Peganum harmala L. contains main beta-carboline alkaloids including harmaline, harmine, harmalol, harmol and tetrahydroharmine. Dry seeds contain 4.3% (w/w) harmine, 5.6% (w/w) harmaline, 0.6% harmalol, and 0.1% (w/w) tetrahydroharmine, while roots contain 2.0% (w/w) harmine and 1.4% (w/w) harmol. Seed extracts act as potent reversible and competitive inhibitors of human monoamine oxidase (MAO-A) with an IC(50) of 27 microg/l. Root extracts also strongly inhibit MAO-A with an IC(50) of 159 microg/l, though both seed and root extracts are poor inhibitors of MAO-B. This potent inhibition of MAO-A by the plant's beta-carbolines could serve as the basis for its purported antidepressant actions.
The primary pharmacological activities of this plant are shown in the list below.
- 1. monoamine oxidase (MAO-A) inhibition
- 2. anti-inflammatory
- 3. antioxidant
- 4. neuroprotective
- 5. antimicrobial
What medicinal compounds this plant contains?
This plant contains the beta-carboline alkaloids harmine, harmaline, tetrahydroharmine, and harmol, as well as the alkaloid vasicine. Harmine and harmaline are well-known for their potent reversible inhibition of monoamine oxidase enzymes. Tetrahydroharmine acts as a significant component that contributes to the plant's complex pharmacological profile. The presence of vasicine provides additional medicinal interest due to its potential biological activities. Together, these diverse compounds define the unique therapeutic potential of Peganum harmala.
According to a study published by "Viruses", the medicinal plant Peganum harmala contains β-carboline alkaloids known as harmine (HAR) and harmaline (HAL). These compounds possess antiviral activities against many viruses, including HSV. Specifically, HAL has been evaluated for its ability to block nearly 50% or 90% plaque formation in vitro when cells are treated with 5 µM HAL for 2 h after a one-hour infection exposure of ~1000 FPU/plate or ~500 PFU/plate. Furthermore, cells treated with 10 µM HAL for 30 min, 60 min, 2 h, and 6 h can reduce CyHV-3 replication by 60%, 65%, 85.5%, and 85%, respectively. HAL under 50 µM shows little toxicity to cells treated for 24 h. Additionally, immersion treatment with 10 µM HAL for 3-4 h daily within the first 5 days post-infection can increase fry survival by 60%.
The primary medicinal compounds of this plant are shown in the list below.
- Harmine
- Harmaline
- Tetrahydroharmine
- Vasicine
- Peganine
What health conditions is this plant used for?
This plant is used for treating Alzheimer's disease, Parkinson's disease, Leishmaniasis, cancer, and anxiety. Its bioactive alkaloids serve as neuroprotective agents that may help mitigate the progressive cognitive and motor symptoms associated with neurodegenerative disorders. Research also indicates that its chemical components possess antiparasitic properties effective against Leishmaniasis infections. Furthermore, certain extracts show potential in inhibiting the growth of various cancer cell lines through targeted mechanisms. The plant also offers sedative properties that can be utilized to manage symptoms of anxiety.
According to a study published by "Scientific reports", Peganum harmala is used in the Sinai Peninsula (Egypt) as a folk medicinal herb for central disorders. It has displayed therapeutic efficacy against Alzheimer's disease (AD) and can alleviate AlCl3-induced Alzheimer-like pathology in a rat model where AlCl3 was administered at 50 mg/kg/day for six consecutive weeks. When a methanolic standardized P. harmala seed extract of 187.5 mg/kg is given, it enhances cognition and improves histopathological structures. The extract works to combat insulin resistance and attenuate the progression of AD by enhancing GLP-1 and insulin trajectories in the hippocampus. It also curtails the hippocampal content of Aβ42, GSK-3β, and phosphorylated tau while increasing pS473-Akt and GLUT4.
The main health conditions this plant is used for are shown in the list below.
- Alzheimer's disease
- Parkinson's disease
- Leishmaniasis
- Cancer
- Anxiety
What are the herbal preparations of this plant?
This plant can be prepared as an infusion by steeping the seeds in hot water, a decoction by boiling them for extended periods, a tincture through alcohol extraction, a fine powder by grinding the dried seeds, or a concentrated extract. Herbalists often use these different methods to isolate specific alkaloids like harmine and harmaline. The powdered form is sometimes mixed into food or capsules for easier consumption. Tinctures provide a shelf-stable way to utilize the plant's potent chemical properties over time. Each preparation method alters the strength and bioavailability of the active constituents within the seeds.
The main herbal preparations of this plant are shown in the list below.
- Infusion
- Decoction
- Tincture
- Powder
- Extract
What side effects this plant can have?
This plant can cause a wide range of adverse reactions including nausea, vomiting, diarrhea, abdominal pain, dizziness, headache, hallucinations, confusion, tachycardia, hypotension, seizures, tremors, and agitation. Consumption of Peganum harmala often leads to significant gastrointestinal distress such as nausea, vomiting, diarrhea, and abdominal pain. Neurological side effects are also common and may manifest as dizziness, headache, hallucinations, or profound confusion. Severe cardiovascular and neurological complications can occur, specifically tachycardia, hypotension, seizures, tremors, and agitation. These varied symptoms highlight the potential toxicity associated with the plant's chemical compounds.
The main side effects this plant can have are shown in the list below.
- Nausea
- Vomiting
- Dizziness
- Diarrhea
- Abdominal pain
- Headache
- Hallucinations
- Confusion
- Tachycardia
- Hypotension
- Seizures
- Tremors
- Agitation