Introduction/Overview
Natural products, as important resources for drug development, have long demonstrated unique advantages in the fields of anti infection, anti-tumor, and anti parasitic effects. Sesquiterpenes have become one of the hotspots in pharmacological research due to their structural diversity and wide range of biological activities. Carabrone (CAS number: 1748-81-8) is a natural sesquiterpene isolated from the fruit of the Asteraceae plant Carpesium abrotanoides. In recent years, Tianming Jing lactone has attracted widespread attention due to its significant antibacterial, antifungal, and anti-tumor activities, especially in the fields of plant pathogen control and anti malaria research, demonstrating potential application value. This article provides a systematic review of the chemical structure, physicochemical properties, extraction methods, pharmacological activity, and mechanism of action of Tianming Jing lactone ketone. Combined with drug evaluation, it explores its clinical application prospects and development directions, providing theoretical support and reference for related research.
Chemical structure and physicochemical properties
Tianming Jing lactone is a sesquiterpene compound with a molecular formula of C15H20O3 and a molecular weight of 248.32. Its structural features include a sesquiterpene skeleton containing a lactone ring, possessing typical terpenoid lactone structural units. According to existing literature reports, the LogP value of Tianming Jinglactone is 2.16, indicating its moderate lipid solubility, which is beneficial for cell membrane permeation and in vivo distribution. Its topological polar surface area (TPSA) is 43.37 Å ², and the number of hydrogen bond acceptors is 3, indicating that its molecule has certain polar groups that facilitate hydrogen bond interactions with biological targets. The overall physicochemical properties show that Tianming Jing lactone has both lipid solubility and polarity, which is conducive to its multi-target biological activity in vitro and in vivo.
The detailed analysis of the chemical structure shows that Tianming Jing lactone contains alpha, beta unsaturated lactone rings, which are considered as key functional groups for its biological activity in various natural products. They can form covalent bonds with thiol or amino residues in proteins through Michael addition reactions, thereby regulating the function of target proteins. In addition, the rigid structure of sesquiterpene skeleton provides a spatial conformational basis for the specific binding of molecules to targets.
Plant sources and extraction methods
Tianming Jing lactone mainly comes from the fruit of the Asteraceae plant Carpesium abrotanoides. Carpesium abrotanoides, distributed in China and East Asia, is traditionally used as folk herbal medicine to treat inflammation and infectious diseases. This plant contains abundant sesquiterpenes, among which tianmingjing lactone is one of the active ingredients.
The extraction process usually combines organic solvent extraction with separation and purification. The specific steps include:
- Raw material processing Collect mature fruits, dry and crush them for later use.
- Crude extraction Use ethanol or methanol for reflux extraction, and optimize the extraction time and temperature according to experimental conditions.
- Liquid liquid distribution The extraction solution is divided into water and organic solvents (such as ethyl acetate) to remove polar impurities.
- chromatographic separation Further separation and purification of Tianmingjing lactone were achieved through techniques such as silica gel column chromatography and reverse phase high performance liquid chromatography (RP-HPLC).
- Structural Identification Confirm the structure of the compound using methods such as nuclear magnetic resonance (NMR), mass spectrometry (MS), and infrared spectroscopy (IR).
In recent years, ultrasound assisted extraction and microwave-assisted extraction techniques have been introduced to improve extraction efficiency and purity, reduce solvent usage and extraction time, and promote the large-scale preparation of Tianming Jing lactone ketone.
Pharmacological activity research
Antibacterial and antifungal activity
Tianming Jing lactone exhibits significant antibacterial and antifungal activity, particularly against plant pathogenic fungi. In vitro experiments have shown that it has strong inhibitory effects on Botrytis cinerea, Colletotrichum lagenarium, and Erysiphe graminis. These fungi are common pathogens in agricultural production, leading to a significant decrease in crop yield and quality. Tianming Jing lactone exerts antifungal effects by disrupting fungal cell membrane structure, inhibiting cell wall synthesis, and interfering with fungal metabolic pathways.
In addition, Tianming Jinglactone showed certain antibacterial activity against various Gram positive and Gram negative bacteria in vitro, indicating its broad-spectrum antibacterial potential. Related studies have shown that tianmingjing lactone can inhibit bacterial biofilm formation, reduce bacterial resistance, and enhance anti infective efficacy.
Antitumor activity
Tianming Jing lactone exhibits inhibitory activity on proliferation and induces apoptosis in various tumor cell lines. The cell experiment results showed that the compound can activate the intracellular apoptotic signaling pathway, regulate the expression of Bcl-2 family proteins, promote mitochondrial membrane potential loss, and induce programmed cell death. In addition, Tianming Jing lactone can also inhibit the progression of tumor cell cycle, block the transition from G0/G1 phase to S phase, and limit cell proliferation.
Its anti-tumor mechanism may involve regulation of oxidative stress, inhibition of inflammatory factors, and interference with signal transduction pathways, and specific targets are still under further investigation. Animal model experiments have also preliminarily verified its anti-tumor activity in vivo, laying the foundation for subsequent preclinical studies.
Malaria resistance potential
In recent years, the demand for drug development for malaria has been increasing. Tianming Jing lactone has shown potential activity in anti malaria research, with related targets involving multiple key proteins of Plasmodium falciparum, including:
- PFCRT (Plasmodium chloroquine resistant transporter protein)
- PFMDR1 (multidrug resistance protein)
- PFDHFR (Folate Reductase)
- PFK13 (serine/threonine protein kinase)
- PFATP6 (Calcium Pump)
- PFCYTBC (Cytochrome BC1 Complex)
- PFPK (phosphokinase)
- PFCYT (Cytochrome)
- PFCYTb (cytochrome b)
- PfATG8 (autophagy related protein)
Tianming Jing lactone may exert antiparasitic effects by binding to the aforementioned targets, interfering with the metabolism and survival mechanisms of malaria parasites. Although the relevant mechanisms have not been fully elucidated at present, their molecular structure and physicochemical properties provide a good foundation for further optimization of drug efficacy.
Mechanism of action and molecular targets
The biological activity of Tianming Jing lactone mainly depends on the α, β - unsaturated ketone groups in its sesquiterpene lactone structure, which can form covalent or non covalent bonds with the active sites of target proteins, regulate protein function, and thus affect cell signaling and metabolic processes.
In terms of antibacterial and antifungal effects, tianmingjing lactone may exert its effects through the following mechanisms:
- Cell membrane disruption Binding with membrane lipids increases membrane permeability, leading to ion imbalance and cell death.
- Inhibition of cell wall synthase Interference with fungal cell wall synthesis and prevention of cell wall formation.
- Inducing oxidative stress Promote the generation of reactive oxygen species (ROS) and damage important biomolecules within cells.
The anti-tumor mechanism involves the regulation of multiple signaling pathways:
- Mitochondrial pathway induces apoptosis Regulating the Bcl-2/Bax ratio, releasing cytochrome c, and activating the caspase cascade reaction.
- cell cycle arrest Inhibit the expression of Cyclin D1 and CDK4, and block cell cycle progression.
- Anti inflammatory and antioxidant effects Inhibit NF - κ B and MAPK signaling, alleviate tumor microenvironment inflammation.
The anti malaria effect may be achieved through the following targets:
- PFCRT and PFMDR1 Regulating drug transport and affecting malaria parasite resistance.
- PFDHFR Inhibit folate metabolism and block DNA synthesis.
- PFATP6 Disrupting calcium ion homeostasis and affecting the physiological function of malaria parasites.
- PFCYTBC and PFCYTb Inhibit mitochondrial electron transport chain and reduce energy supply.
- PfATG8 Regulating autophagy process and affecting the survival of malaria parasites.
The multi-target characteristics of these mechanisms of action endow Tianming Jing lactone with broad biological activity and low risk of drug resistance, making it potential for development as a multifunctional drug.
Evaluation of drug properties and pharmacokinetics
The pharmacological parameters of Tianming Jing lactone ketone show that it has good potential for drug development. The molecular weight of 248.32 conforms to the ideal range of Lipinski's rule, with a LogP of 2.16, indicating moderate lipid solubility and favorable oral absorption and cell membrane penetration. The TPSA value of 43.37 Å ² and the number of hydrogen bond acceptors of 3 indicate that the molecular polarity is moderate, which is conducive to binding to the target and has good bioavailability.
At present, there is limited research on the pharmacokinetics of tianmingjing lactone. Preliminary in vivo experiments have shown that the compound has good oral absorption, moderate plasma half-life, and can reach effective concentrations in the body. Its metabolic pathway may mainly involve oxidation and hydroxylation modification by the liver cytochrome P450 enzyme system, generating water-soluble metabolites for easy excretion.
Toxicological evaluation shows that Tianming Jing lactone has no significant acute toxicity or subchronic toxicity within the commonly used dosage range, and has high safety. However, further research is needed on long-term toxicity and mutagenicity to ensure the safety of clinical applications.
Clinical application prospects and prospects
Tianming Jing lactone has demonstrated clinical application potential in multiple fields due to its broad-spectrum antibacterial, antifungal, anti-tumor, and antimalarial activities. The specific prospects include:
- Agricultural disease prevention and control Regarding fungal diseases such as gray mold, anthracnose, and powdery mildew, Tianming Jing lactone can be used as a natural pesticide ingredient to replace traditional chemical pesticides, reducing environmental pollution and pesticide residues.
- Development of anti infective drugs Its broad-spectrum antibacterial properties provide new ideas for antibiotic alternatives, especially in the context of an increase in drug-resistant strains, which is of great significance.
- Candidate anti-tumor drugs By optimizing its structure and dosage form, Tianming Jinglactone is expected to be developed as an adjuvant therapy for tumors, improving patient prognosis.
- Research on antimalarial drugs Combining multi-target mechanisms, Tianming Jing lactone can serve as a lead compound for new anti malaria drugs, promoting innovation in malaria treatment strategies.
Future research should focus on pharmacokinetic optimization, structural modification to enhance activity and selectivity, in-depth mechanism analysis, and preclinical safety evaluation of tianmingjing lactone. At the same time, combining modern drug delivery systems such as nanocarriers and targeted agents can enhance their bioavailability and therapeutic efficacy.
Conclusion
Tianming Jing lactone ketone, as a natural sesquiterpene with multiple biological activities, has become a hot topic in natural product pharmacology research due to its unique chemical structure and extensive pharmacological effects. It has shown significant potential in the fields of antibacterial, antifungal, anti-tumor, and anti malaria, and has good drug properties and safety. In the future, through in-depth mechanism research and drug optimization, it is expected to promote the clinical application of Tianming Jing lactone ketone, enrich the natural product drug library, and provide new treatment methods for human health.
