Storage conditions：Short-term storage at 2~8℃, long-term storage at -20 ~ -80℃
Harmaline (CAS number: 304-21-2) is a naturally occurring alkaloid with significant biological activity and is an important member of the β - alkaloid family. Its structural feature is that the Harman skeleton is replaced by methoxy at the C-7 position and reduced at the 3,4 bond, forming a unique molecular configuration. Cameline is mainly found in various plants, especially in the Peganum genus, and is one of the important components in traditional medicine. In recent years, with the rapid development of natural product pharmacology and molecular targeted therapy, camel thorn alkaloid has become one of the hotspots in the research and development of anti-tumor drugs due to its multi-target regulatory ability and good drug properties.
Gastric cancer, as a malignant tumor with high incidence rate and mortality in the world, its treatment still faces great challenges. The multi-target regulatory effect of berberine in gastric cancer cells, especially on key molecules such as BCL2, STAT3, NFE2L2, TOP1, MAPK1, PIK3CA, BCL2L1, MMP9, and EGFR, provides a theoretical basis for its anti gastric cancer potential. This article aims to systematically review the chemical structure, sources, pharmacological activities, and mechanisms of action of camel thorn alkaloids, and explore their clinical application prospects in diseases such as gastric cancer through drug evaluation.
The molecular formula of camel thorn alkaloid is C13H14N2O, with a molecular weight of 214.2680, belonging to the β - base alkaloid class. Its structure is based on the Harman skeleton, where the 3,4 bonds are reduced and the C-7 methoxy group is substituted to form a unique substitution pattern. This structure endows camelbine with good lipid solubility (LogP=2.6638), making it easy to penetrate cell membranes and the blood-brain barrier (BBB penetration is high), which is beneficial for the pharmacological effects of the central nervous system.
In terms of physical and chemical properties, the polar surface area (TPSA) of camelbine is 37.38 Å ², indicating that its molecular polarity is moderate and conducive to the permeation of biofilms. The low water solubility (0.0340 mg/mL) suggests that it may require appropriate drug delivery carriers or formulation strategies in vivo to improve bioavailability. The negative result of hERG channel inhibition experiment indicates a low risk of cardiac toxicity. The Ames mutagenicity test result is 0.3, indicating a low risk of genotoxicity and a good safety basis.
Camelthorn alkaloids are mainly found in plants of the Camelthorn genus, especially Peganum harmala (commonly known as Hamann grass or Camelthorn). This plant is widely distributed in Central Asia, North Africa, and the Middle East, traditionally used for antibacterial, anti-inflammatory, and treatment of neurological diseases. Cameline, as one of its main active ingredients, has multiple pharmacological functions.
The extraction method usually uses organic solvent extraction combined with acid-base extraction technology. The specific steps include: crushing the dried plant seeds or whole grass, refluxing extraction with ethanol or methanol, concentrating the filtrate, treating it with dilute acid to dissolve the alkaloids in salt state, and then adjusting the pH to separate them in free state. Further purification using liquid-liquid extraction, column chromatography, or high-performance liquid chromatography (HPLC) to obtain high-purity camel seed alkaloid. In recent years, the application of ultrasound assisted extraction and supercritical fluid extraction technology has improved extraction efficiency and purity, reduced solvent usage, and is in line with the concept of green chemistry.
Camelthorn alkaloids exhibit various biological activities, including anti-tumor, neuroprotective, antibacterial, and anti-inflammatory fields. Its anti-tumor activity is particularly outstanding, especially in gastric cancer cell lines, showing significant inhibition of cell proliferation and induction of apoptosis.
Numerous in vitro studies have shown that berberine can effectively inhibit the proliferation of gastric cancer cells, induce cell cycle arrest and apoptosis. Its function is closely related to regulating multiple signaling pathways, including inhibiting the STAT3 and MAPK signaling pathways, reducing the expression of anti apoptotic proteins BCL2 and BCL2L1, and promoting the activation of apoptosis related proteins. In addition, camelbine enhances cellular antioxidant capacity and reduces oxidative damage in the tumor microenvironment by regulating NFE2L2 mediated oxidative stress response.
Animal model studies further confirmed the anti-tumor effect of camel antler alkaloids. Oral or injectable administration of camel seed alkaloid can significantly inhibit the growth of gastric cancer xenografts, reduce tumor volume and weight, and improve the pathological morphology of tumor tissue. Its anti-tumor mechanism involves inhibiting the invasion and metastasis ability of tumor cells, partially by downregulating MMP9 expression, blocking extracellular matrix degradation, and inhibiting tumor cell migration.
In addition to anti-tumor effects, camel venom alkaloids have also shown potential in neurological diseases. Its high blood-brain barrier penetration makes it a candidate drug for studying antidepressant, anti Parkinson's disease, and cognitive dysfunction. Cameline exerts neuroprotective effects by regulating neurotransmitter metabolism and neuroprotective signaling pathways.
The pharmacological effects of camel thorn alkaloid are based on its multi-target regulatory ability, especially in the molecular mechanism research of gastric cancer treatment, which has made significant progress. The main targets and mechanisms of action include:
BCL2 and BCL2L1
Cameline downregulates the expression of anti apoptotic proteins BCL2 and BCL2L1, disrupts the survival signal of tumor cells, and promotes mitochondrial mediated apoptosis. This mechanism is the core link in inducing apoptosis of gastric cancer cells.
STAT3 signaling pathway
STAT3, as an important regulatory factor for tumor cell proliferation and immune escape, is inhibited by camel antler alkaloids by inhibiting its phosphorylation activation, blocking the expression of downstream tumor promoting genes, and inhibiting tumor growth and metastasis.
NFE2L2 (NRF2) regulation
Cameline activates the NFE2L2 signaling pathway, enhances cellular antioxidant defense, reduces oxidative stress damage, protects normal cells from free radical damage, and regulates the tumor microenvironment.
TOP1 (Topoisomerase I)
As a DNA topoisomerase, TOP1 plays a crucial role in DNA replication and transcription. The regulation of TOP1 activity by camelbine may affect the DNA repair and proliferation ability of tumor cells.
MAPK1 (ERK2) and PIK3CA (PI3K) signaling pathways
Cameline regulates the MAPK and PI3K/AKT signaling pathways, inhibits tumor cell proliferation, promotes apoptosis, and affects cell cycle regulation.
MMP9 and EGFR
Cameline inhibits the expression of matrix metalloproteinase MMP9, reduces cellular matrix degradation, and suppresses tumor cell invasion and metastasis. At the same time, regulating the EGFR signaling pathway and blocking the growth signaling of tumor cells.
In summary, camel antler alkaloids exert their pharmacological effects against gastric cancer and other diseases through multi-target and multi pathway synergistic effects, demonstrating good potential for targeted therapy.
The pharmacological parameters of camel thorn alkaloid show that it has good potential for drug development. The molecular weight of 214.2680 conforms to Lipinski's rule, and the LogP value of 2.6638 indicates moderate lipid solubility, which is beneficial for cell membrane permeation and oral absorption. The TPSA value of 37.38 Å ² is relatively low, which helps to penetrate biological membranes and the blood-brain barrier, supporting its pharmacological activity in the nervous system.
Low water solubility (0.0340 mg/mL) may limit its oral bioavailability, and drug formulation techniques such as nanocarriers and solid dispersions are needed to improve solubility. The high permeability of the blood-brain barrier suggests its suitability for treating central nervous system diseases, but potential central nervous system side effects also need to be considered.
The hERG channel inhibition experiment was negative, reducing the risk of cardiac toxicity and demonstrating good safety. The Ames test result is 0.3, indicating a low risk of genotoxicity and meeting preclinical safety requirements.
Pharmacokinetic studies have shown that berberine is rapidly absorbed orally, has a moderate plasma half-life, and is widely distributed in the body, especially at high concentrations in brain tissue. Its metabolism is mainly through the liver enzyme system, and the safety of its metabolites needs further evaluation. The excretion pathway is mainly through the kidneys, indicating that renal function has a significant impact on drug clearance.
Camelthorn alkaloid, as a multi-target natural alkaloid, exhibits a wide range of pharmacological activities and good drug properties, especially in the field of gastric cancer treatment, with significant potential. It provides a new approach for targeted therapy of gastric cancer by regulating multiple signaling pathways, inhibiting tumor cell proliferation, inducing apoptosis, and blocking invasion and metastasis.
The key to future clinical applications lies in improving its bioavailability and targeting, and reducing potential toxic side effects. Nano drug carriers, sustained-release formulations, and combination therapy strategies are effective ways to enhance the clinical efficacy of camel alkaloids. In addition, in-depth study of its pharmacokinetic characteristics and metabolic mechanisms can help optimize the dosing regimen and dosage design.
In addition to gastric cancer, the application prospect of harmine in nervous system diseases, inflammation and infectious diseases also deserves attention. Its high blood-brain barrier penetration and multi-target regulatory ability provide potential new drug candidates for the treatment of neurodegenerative diseases and mental disorders.
Overall, as a model for the development of natural product drugs, camel thorn alkaloids are expected to become effective therapeutic drugs for various diseases through structural modification and drug design in the future. Strengthening its preclinical safety evaluation and mechanism research will lay a solid foundation for its clinical translation.
Cameline, as a natural alkaloid with unique structure and diverse activities, has become a hot topic in the research of anti gastric cancer and neurological diseases due to its multi-target regulation ability and good drug properties. It exerts anti-tumor, antioxidant, and neuroprotective effects by regulating key molecules such as BCL2, STAT3, NFE2L2, MAPK1, and PIK3CA, demonstrating broad clinical application prospects.
Future research should focus on improving its pharmacokinetic performance, optimizing drug delivery strategies, delving into the mechanism of action and safety evaluation, and promoting the clinical application of berberine. As an important representative of natural product pharmacology, the development and application of camel thorn alkaloid not only enriches natural drug resources, but also provides new drug candidates and treatment ideas for modern precision medicine.
