Asarone

Asarone is a naturally occurring organic compound that belongs to the class of phenylpropanoids. It is found in various plants, including Acorus calamus, also known as sweet flag or calamus. Asarone exists in two isomeric forms: alpha-asarone and beta-asarone. These isomers have slightly different chemical structures, leading to variations in their properties and potential effects.

Historical Significance

The use of plants containing asarone dates back centuries, with historical records indicating its presence in traditional medicine and cultural practices. In Ayurvedic medicine, Acorus calamus has been utilized for its purported medicinal properties, including its role in promoting cognitive function and overall well-being. The compound has also been used in traditional Chinese medicine for its potential benefits.

Chemical Properties

Alpha-asarone and beta-asarone are both classified as phenylpropanoids, which are organic compounds commonly found in plants. These isomers have similar chemical structures, with the main difference being the position of a double bond in the molecule. This structural variation can influence the compound's interactions with biological systems and its overall effects.

Pharmacological Effects

Research on asarone and its isomers has revealed a range of potential pharmacological effects. Studies have suggested that asarone may possess antioxidant properties, which could help protect cells from oxidative stress and damage. Additionally, the compound has been investigated for its potential neuroprotective effects, with some studies indicating a possible role in supporting cognitive function and brain health.

Safety and Regulatory Considerations

Despite its potential benefits, the safety of asarone has been a topic of concern. Beta-asarone, in particular, has been associated with potential toxic effects, leading to regulatory restrictions on its use in certain regions. Due to these safety concerns, the compound's presence in food and herbal products is regulated in some countries to minimize potential risks to consumers.

Research and Future Directions

Ongoing research continues to explore the pharmacological properties and potential applications of asarone and its isomers. Scientists are investigating the compound's mechanisms of action, safety profile, and therapeutic potential in various health conditions. Future studies may shed more light on the benefits and risks associated with asarone, providing valuable insights for its use in medicine and other applications.

.

Articles/Studies

Comparative study of the cytotoxicity and genotoxicity of alpha- and Beta-asarone.

Large quantities of beta-asarone, purified from Calamus and injected into animals was shown to be carcinogenic. The very small quantities one ingests from using the entire rhizome do not contain enough to be a risk factor for cancer. Some psychonauts are able to extract it from the essential oil for a starting material for a hallucinogenic extract called TMA2. Entheology

Alzheimer's

• beta-Asarone Inhibits Amyloid-beta by Promoting Autophagy in a Cell Model of Alzheimer's Disease.
• Effect of beta-asarone in normal and beta-amyloid-induced Alzheimeric rats.
• beta-asarone modulates Beclin-1, LC3 and p62 expression to attenuate Abeta40 and Abeta42 levels in APP/PS1 transgenic mice with Alzheimer's disease.
• Anti-Amyloidogenic Effects of Asarone Derivatives From Perilla frutescens Leaves against Beta-Amyloid Aggregation and Nitric Oxide Production.
• Neuroprotective effect of beta-asarone against Alzheimer's disease: regulation of synaptic plasticity by increased expression of SYP and GluR1.
• Beta-asarone attenuates neuronal apoptosis induced by Beta amyloid in rat hippocampus.
• Combined application of tenuigenin and beta-asarone improved the efficacy of memantine in treating moderate-to-severe Alzheimer's disease.

Cancer

• Nitro Derivatives of Naturally Occurring beta -Asarone and Their Anticancer Activity.
• beta-Asarone Increases Chemosensitivity by Inhibiting Tumor Glycolysis in **Gastric Cancer**
• beta-Asarone **increases doxorubicin sensitivity** by suppressing NF-kappaB signaling and abolishes doxorubicin-induced enrichment of stem-like population by destabilizing Bmi1.
• Experimental evidence for use of Acorus calamus (asarone) for cancer chemoprevention.
• beta-Asarone Inhibits Invasion and EMT in Human **Glioma** U251 Cells by Suppressing Splicing Factor HnRNP A2/B1.
• Beta-asarone induces LoVo colon cancer cell apoptosis by up-regulation of caspases through a mitochondrial pathway in vitro and in vivo.

Cardiovascular

Beta-Asarone Alleviates Myocardial Ischemia-Reperfusion Injury by Inhibiting Inflammatory Response and NLRP3 Inflammasome Mediated Pyroptosis.

Cerebrovascular

• Positive effects of α-asarone on transplanted neural progenitor cells in a murine model of ischemic stroke
• Beta-asarone, a major component of Acorus tatarinowii Schott, attenuates focal cerebral ischemia induced by middle cerebral artery occlusion in rats.
• Effect of alpha-asarone on the Function and Expression of P-glycoprotein in Rat Brain Microvascular Endothelial Cells

Depression

• beta-asarone relieves chronic unpredictable mild stress induced depression by regulating the extracellular signal-regulated kinase signaling pathway.
• beta-asarone reverses chronic unpredictable mild stress-induced depression-like behavior and promotes hippocampal neurogenesis in rats.
• Biphasic Effects of alpha-Asarone on Immobility in the Tail Suspension Test: Evidence for the Involvement of the Noradrenergic and Serotonergic Systems in Its Antidepressant-Like Activity.
• beta-asarone from Acorus gramineus alleviates depression by modulating MKP-1.

Neuroprotective

• alpha-Asarone Attenuates Cognitive Deficit in a Pilocarpine-Induced Status Epilepticus Rat Model via a Decrease in the Nuclear Factor-kappaB Activation and Reduction in Microglia Neuroinflammation.
• Oral Administration of alpha-Asarone Promotes Functional Recovery in Rats With Spinal Cord Injury.
• Neuroprotective Effects and Mechanism of beta-Asarone against Abeta1-42-Induced Injury in Astrocytes.
• Asarone from Acori Tatarinowii Rhizoma Potentiates the Nerve Growth Factor-Induced Neuronal Differentiation in Cultured PC12 Cells: A Signaling Mediated by Protein Kinase A.
• alpha-Asarone Ameliorates Memory Deficit in Lipopolysaccharide-Treated Mice via Suppression of Pro-Inflammatory Cytokines and Microglial Activation.
• beta-Asarone Rescues Pb-Induced Impairments of Spatial Memory and Synaptogenesis in Rats.
• Asarone from Acori Tatarinowii Rhizome prevents oxidative stress-induced cell injury in cultured astrocytes: A signaling triggered by Akt activation.
• β-asarone prevents Aβ25-35-induced inflammatory responses and autophagy in SH-SY5Y cells: down expression Beclin-1, LC3B and up expression Bcl-2
• Identification of both GABAA receptors and voltage-activated Na(+) channels as molecular targets of anticonvulsant alpha-asarone.
• Neurogenesis-Promoting Natural Product alpha-Asarone Modulates Morphological Dynamics of Activated Microglia.
• Anticonvulsant activity of acute and chronic treatment with a-asarone from Acorus gramineus in seizure models.
• Beta-asarone improves cognitive function by suppressing neuronal apoptosis in the beta-amyloid hippocampus injection rats.
• Effects of asarone and beta-asarone on conditioned responses, fighting behaviour and convulsions.
• Cognitive enhancing effects of alpha asarone in amnesic mice by influencing cholinergic and antioxidant defense mechanisms.
• Effect of Beta-Asarone on Impairment of Spatial Working Memory and Apoptosis in the Hippocampus of Rats Exposed to Chronic Corticosterone Administration.
• Dynamic changes of five neurotransmitters and their related enzymes in various rat tissues following beta-asarone and levodopa co-administration.

Nicotine

Protective effect of alpha-asarone against nicotine-induced seizures in mice, but not by its interaction with nicotinic acetylcholine receptors.

Other Effects

• Alpha-Asarone Protects Endothelial Cells from Injury by Angiotensin II.
• alpha-Asarone blocks 7beta-hydroxycholesterol-exposed macrophage injury through blocking elF2alpha phosphorylation and prompting beclin-1-dependent autophagy.
• Borneol and alpha-asarone as adjuvant agents for improving blood-brain barrier permeability of puerarin and tetramethylpyrazine by activating adenosine receptors.
• Alpha-Asarone, a Major Component of Acorus gramineus, Attenuates Corticosterone-Induced Anxiety-Like Behaviours via Modulating TrkB Signaling Process.
• Fate of beta-asarone in Ayurvedic Sodhana process of Vacha.
• Purple perilla extracts with alpha-asarone enhance cholesterol efflux from oxidized LDL-exposed macrophages.