Comparative study of Danshen and Siwu decoction based on the molecular structures of the components and predicted targets

Biological Evaluation of Lysionotin: a Novel Inhibitor of 5-Lipoxygenase for Anti-glioma

OBJECTIVE

To explore the potential mechanism of lysionotin in treating glioma.

METHODS

First, target prediction based on Bernoulli Naïve Bayes profiling and pathway enrichment was used to predict the biological activity of lysionotin. The binding between 5-lipoxygenase (5-LO) and lysionotin was detected by surface plasmon resonance (SPR) and molecular docking, and the inhibitory effects of lysionotin on 5-LO and proliferation of glioma were determined using enzyme inhibition assay in vitro and cell viability analysis, respectively. Furthermore, the pharmaceutical effect of lysionotin was explored by cell survival rate analysis and liquid chromatography with tandem mass spectrometry (LC-MS/MS). The protein expression, intracellular calcium ion concentration and cytoskeleton detection were revealed by Western blot, flow cytometry and fluorescence labeling, respectively.

RESULTS

Target prediction and pathway enrichment revealed that lysionotin inhibited 5-LO, a key enzyme involved in the arachidonic acid metabolism pathway, to inhibit the proliferation of glioma. Molecular docking results demonstrated that 5-LO can be binding to lysionotin through hydrogen bonds, forming bonds with His600, Gln557, Asn554, and His372. SPR analysis further confirmed the interaction between 5-LO and lysionotin. Furthermore, enzyme inhibition assay in vitro and cell survival rate analysis revealed that 50% inhibition concentration of lysionotin and the median effective concentration of lysionotin were 90 and 16.58 µmol/L, respectively, and the results of LC-MS/MS showed that lysionotin inhibited the production of 5S-hydroperoxy-eicosatetraenoic acid (P<0.05), and moreover, the LC-MS/MS results indicated that lysionotin can enter glioma cells well (P<0.01) and inhibit their proliferation. Western blot analysis demonstrated that lysionotin can inhibit the expression of 5-LO (P<0.05) and downstream leukotriene B4 receptor (P<0.01). In addition, the results showed that lysionotin affected intracellular calcium ion concentration by inhibiting 5-LO to affect the cytoskeleton, as determined by flow cytometry and fluorescence labeling.

CONCLUSION

Lysionotin binds to 5-LO could suppress glioma by inhibiting arachiodonic acid metabolism pathway.

The multifaceted mechanisms of Dihydrotanshinone I in the treatment of tumors

The morbidity and mortality of malignant tumors are progressively rising on an annual basis. Traditional Chinese Medicine (TCM) holds promise as a possible therapeutic agent for the avoidance or therapy of malignant tumors. Salvia miltiorrhiza Bunge (Danshen), a traditional Asian functional food, has therapeutic characteristics in application for the treatment of malignant tumors. Dihydrotanshinone I (DHTS) is the principal lipophilic phenanthraquinone compound found in Salvia miltiorrhiza Bunge, whose anti-tumor effect has attracted widespread attention. The anti-tumor effects include inhibiting cancer cell proliferation, triggering apoptosis of tumor cells, inducing ferroptosis in tumor cells, inhibiting tumor cell invasion and metastasis, and improving drug resistance of tumor cells. In this paper, we summarized and analyzed the mechanisms and targets of anti-tumor effect of DHTS, providing new ideas and establishing a solid theoretical basis for the future advancement and clinical treatment of DHTS.

Antitumor immunostimulatory activity of the traditional Chinese medicine polysaccharide on hepatocellular carcinoma

Hepatocellular carcinoma (HCC) is a prevalent malignancy, often associated with compromised immune function in affected patients. This can be attributed to the secretion of specific factors by liver cancer cells, which hinder the immune response and lead to a state of immune suppression. Polysaccharides derived from traditional Chinese medicine (TCM) are valuable constituents known for their immunomodulatory properties. This review aims to look into the immunomodulatory effects of TCM polysaccharides on HCC. The immunomodulatory effects of TCM polysaccharides are primarily manifested through the activation of effector T lymphocytes, dendritic cells, NK cells, and macrophages against hepatocellular carcinoma (HCC) both in vivo and in vitro settings. Furthermore, TCM polysaccharides have demonstrated remarkable adjuvant antitumor immunomodulatory effects on HCC in clinical settings. Therefore, the utilization of TCM polysaccharides holds promising potential for the development of novel therapeutic agents or adjuvants with advantageous immunomodulatory properties for HCC.