Storage conditions：Short-term storage at 2~8℃, long-term storage at -20 ~ -80℃
Myritic acid (CAS number: 544-63-8) is a saturated fourteen carbon fatty acid widely present in various animal and plant fats, especially abundant in milk fat, coconut oil, palm oil, and nutmeg oil. As a natural fatty acid, myristic acid is not only an important component of cell membrane lipids, but also widely studied in pharmacology and natural product research due to its unique biological activity. In recent years, with the in-depth study of the biological functions of fatty acids, myristic acid has gradually become a potential therapeutic molecule due to its significant antibacterial, anti-inflammatory, and analgesic effects. This article will systematically review the chemical structure and physicochemical properties, sources and extraction, pharmacological activity and mechanism of action, pharmacological evaluation, and clinical application prospects of myristic acid, in order to provide theoretical basis and research direction for the pharmacological research and clinical development of this natural product.
The chemical name of myristic acid is Tetradecanoic acid, with a molecular formula of C14H28O2 and a molecular weight of 228.3760. Its structure is a saturated fatty acid chain consisting of 14 carbon atoms, with a carboxyl group (- COOH) at the end. The structural characteristics of myristic acid make it highly hydrophobic and exhibit high lipid solubility.
In terms of physical and chemical properties, the LogP value of myristic acid is 6.3923, indicating its high lipophilicity. It is difficult to dissolve in water (with a water solubility of about 0.0116 mg/mL), but easily soluble in organic solvents such as ethanol, ether, and chloroform. Its topological polar surface area (TPSA) is 37.3 Å ², indicating low polarity. Myric acid has good blood-brain barrier penetration ability, which provides the possibility for its potential application in central nervous system related diseases. The hERG channel inhibition test result was negative, indicating a low risk of cardiac toxicity. The Ames test result was 0.0, indicating no significant mutagenicity.
Myristic acid is widely present in various plant oils and fats, especially in nutmeg oil, coconut oil, palm oil, and milk fat where the content is relatively high. The content of myristic acid in nutmeg oil can reach about 16-21%, in coconut oil it is about 16%, and in palm oil it is slightly lower. Due to its widespread distribution, the extraction of myristic acid is relatively convenient.
The traditional extraction method mainly relies on the saponification and esterification of fatty acids, followed by solvent extraction and distillation separation and purification. Modern extraction techniques include supercritical fluid extraction (SFE), microwave-assisted extraction (MAE), and enzymatic hydrolysis, which can improve extraction efficiency, reduce the use of organic solvents, and are more environmentally friendly. During the extraction process, plant oils are usually saponified to produce fatty acid sodium salts, which are then acidified to release free fatty acids. Subsequently, purification is carried out using column chromatography or high-performance liquid chromatography (HPLC) to obtain high-purity myristic acid.
Myric acid exhibits broad-spectrum antibacterial activity and can inhibit the growth of various Gram positive and Gram negative bacteria. Research has shown that myristic acid has significant inhibitory effects on Staphylococcus aureus, Streptococcus pneumoniae, Escherichia coli, and Pseudomonas aeruginosa. Its antibacterial mechanism mainly involves disrupting the integrity of bacterial cell membranes, interfering with membrane protein function, leading to leakage of cell contents and bacterial death. In addition, myristic acid also exhibits certain inhibitory effects on fungi such as Candida albicans.
Myric acid exerts anti-inflammatory effects by regulating the NF - κ B signaling pathway. NF - κ B is a key transcription factor regulating inflammatory response, and myristic acid can inhibit the activation of NF - κ B, reduce the expression of pro-inflammatory factors such as TNF - α, IL-1 β, and IL-6, thereby alleviating inflammatory response. Both in vitro and in vivo experiments have confirmed that myristic acid significantly reduces inflammatory markers in inflammatory models, suggesting its potential therapeutic value in inflammatory diseases.
Myric acid also exhibits certain analgesic effects, which may be related to its anti-inflammatory effects. By inhibiting the release of inflammatory mediators, myristic acid can alleviate the pain caused by inflammation. In addition, studies have shown that it may participate in the analgesic process by regulating neurotransmitter release and ion channel activity, but the specific mechanism still needs further clarification.
The pharmacological effects of myristic acid involve multiple molecular targets and signaling pathways, particularly in antibacterial and anti-inflammatory aspects.
Myric acid acts on multiple microbial targets, including:
Myric acid inhibits the NF - κ B signaling pathway, blocks the transcriptional expression of inflammatory mediators, and reduces the infiltration and activation of inflammatory cells. In addition, myristic acid may regulate the MAPK pathway and inhibit oxidative stress response, further reducing inflammatory damage.
The analgesic effect may involve the inhibition of inflammatory mediators in peripheral nerve endings and the regulation of pain transmission pathways in the central nervous system. The high blood-brain barrier penetration of myristic acid supports its potential in central analgesia.
The pharmacological evaluation of myristic acid shows that it has certain potential for development. A high LogP value (6.3923) suggests that it has strong lipid solubility and is easy to penetrate cell membranes and the blood-brain barrier, but it may also affect its water solubility and bioavailability. Low water solubility (0.0116 mg/mL) is a major challenge in the development of its formulation, which needs to be improved through drug carrier systems or structural modifications.
The high penetration of the blood-brain barrier provides advantages for its application in the treatment of neurological diseases. The negative hERG channel inhibition test indicates a low risk of cardiac toxicity, and the Ames test has no mutagenicity and good safety.
In terms of pharmacokinetics, myristic acid is mainly absorbed through the intestine after oral administration, and its metabolic pathways are mainly β - oxidation and esterification, ultimately excreted through urine and bile. Its half-life and bioavailability are greatly affected by lipid solubility and metabolic enzyme activity, and further systematic research is needed.
Myric acid has broad clinical application prospects due to its multiple biological activities. Its antibacterial activity provides a natural molecular basis for the development of new anti infective drugs, especially with potential advantages in combating drug-resistant strains. The anti-inflammatory and analgesic effects make it a candidate drug for treating chronic inflammatory diseases, arthritis, and neuropathic pain.
Future research should focus on:
In addition, as a member of the fatty acid family, the synergistic effect and metabolic regulation mechanism of myristic acid with other fatty acids also deserve further exploration.
As a natural saturated fatty acid, myristic acid has become a hot topic in natural product pharmacology research due to its significant antibacterial, anti-inflammatory, and analgesic activities. It exhibits excellent potential as a drug by exerting biological effects through multiple targets and pathways. Despite poor water solubility and limited bioavailability, with the advancement of formulation technology and pharmacological mechanism research, myristic acid is expected to become an important candidate molecule for the new generation of natural product drugs. Future systematic research and clinical validation will lay a solid foundation for its clinical application, promoting its widespread use in the fields of anti infection, anti-inflammatory, and pain management.
