[Effects of total C-21 steroidal glucosides from Cynanchum auriculatum on oxidative stress pathway in mice with liver injury].

The study aimed to investigate the mechanism of hepatoprotective effect of C-21 steroidal glucosides from Cynanchum auriculatum( Baishouwu) on oxidative stress in mice with liver injury. Mice were randomly divided into normal group,model group,positive control group,Baishouwu high group and Baishouwu low group. The liver injury model was induced by intraperitoneal injection of CCl4 peanut oil solution. All mice were sacrificed to collect blood and liver specimens. The activities of serum levels of ALT and AST were detected. The content of MDA and the activity of SOD in liver homogenate were examined by colorimetry method. Tissues were stained with hematoxylin-eosin for histological examination. The hepatic protein expressions of NF-κB p65,p-IκBα,i NOS and COX-2 were detected by Western blot. The mRNA expressions of TNF-α and IL-6 were determined by RT-PCR. It was found that treatment with C-21 steroidal glucosides from Baishouwu successfully attenuated liver injury induced by CCl4,as shown by decreased levels of serum biochemical indicators( AST,ALT)( P<0. 01). Administration of total C-21 steroidal glucosides enhanced the activity of SOD( P<0. 01) and decreased the content of MDA( P<0. 01) in liver homogenate. Microscopic features suggested that treatment with C-21 steroidal glucosides from Baishouwu was effective in inhibiting CCl4-induced hepatocyte edema and degeneration. Further studies showed that NF-κB p65 overexpression induced by CCl4 was decreased by C-21 steroidal glucosides,leading to the markedly down-regulated protein expression levels of p-IκBα,i NOS and COX-2,as well as the depression of TNF-α and IL-6 mRNA expressions. In conclusion,total C-21 steroidal glucosides from Baishouwu exhibited potent effect on oxidative stress pathway in mice with liver injury induced by CCl4,with enhanced activity of SOD,decreased content of MDA,and down-regulated levels of NF-κB p65,p-IκBα,i NOS and COX-2.

[Effects of total C-21 steroidal glycosides from Baishouwu on proliferation invasion and apoptosis of human hepatic cancer HepG2 cells].

This study aimed to investigate the inhibitory effect of total C-21 steroidal glycoside (TCSG) from Baishouwu on the proliferation, invasion and apoptosis of human hepatoma HepG2 cells in vitro and the relevant molecular mechanism. The experiment was divded into control group, TCSG groups (25, 60, 150 mg·L⁻¹) and positive control cisplatin group (1.33 mg·L⁻¹). Human hepatocyte L-02 cells and hepatoma HepG2 cells were treated with different concentrations of TCSG. Then, the inhibitory effect of TCSG on the proliferation of HepG2 cells was detected by CCK-8 method. Cell cycle, cell apoptosis and mitochondrial membrane potential were detected by flow cytometry. The apoptotic morphology was observed by Hoechst 33258 staining. Cell migration and invasion abilities were analyzed by Transwell chamber model. The protein expressions of Bcl-2, Bax, caspase 3, cleaved caspase 3 and Cyt C (cytosolchondrial) were detected by Western blot. Compared with the control group, the proliferation of HepG2 cells was significantly inhibited after treatment with different concentrations of TCSG for 48 h in a dose-dependent manner(P<0.01), but no obvious effect was observed on the proliferation of L-02 cells. After treatment with TCSG for 48 h, apoptotic morphology such as nuclear shrinkage, fragmentation and semilunar or circular was observed; migration and invasion abilities of cells were significantly decreased, cell cycle was blocked in the G0/G1 phase(P<0.01), mitochondrial membrane potential was remarkably decreased(P<0.01), and so did the ratio of apoptosis(P<0.01).Western blot results showed that the protein expressions of Bax, caspase 3, cleaved caspase 3, and Cyt C were significantly up-regulated(P<0.05, P<0.01), while the Bcl-2 protein was significantly down-regulated(P<0.05, P<0.01). Furthermore, the ratio of Bax/Bcl-2 was increased (P<0.01). The results suggested that TCSG could inhibit the proliferation and invasion of HepG2 cells, and induce the apoptosis of HepG2 cells. The potential mechanism may be related to the blocking of cell cycle and the regulation of the expressions of apoptosis-related proteins by activating mitochondrial pathway.

Antitumor evaluation and multiple analysis on different extracted fractions of the root of Cynanchum auriculatum Royle ex Wight.

The root of Cynanchum auriculatum (C. auriculatum) Royle ex Wight has been shown to possess various pharmacological effects and has recently attracted much attention with respect to its potential role in antitumor activity. The C-21 steroidal glycosides are commonly accepted as the major active ingredients of C. auriculatum. In this study, the antitumor abilities of different extracted fractions of the root bark and the root tuber of C. auriculatum were investigated by using a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay in human cancer cell lines HepG2 and SMMC-7721. The results showed that the chloroform and ethyl acetate fractions of the root tuber suppressed tumor cell growth strongly. To identify and characterize the chemical constituents of different active fractions, an ultra high performance liquid chromatography with triple-quadrupole tandem mass spectrometry method was developed for the simultaneous quantitation of eight C-21 steroidal glycosides. The analysis revealed that the C-21 steroidal glycosides were concentrated in the chloroform and ethyl acetate fractions, and the total contents of different fractions in the root tuber were significantly higher than those of corresponding ones in the root bark. Furthermore, the C-21 steroidal glycosides based on different types of aglucones were prone in different medicinal parts of C. auriculatum.

Gualou Xiebai decoction inhibits cardiac dysfunction and inflammation in cardiac fibrosis rats.

BACKGROUND: Gualou Xiebai Decoction (GXD) is a well-known traditional Chinese recipe. It has been used to treat cardiovascular disorders for nearly two thousand years. But there is a lack of reports on cardiac fibrosis and underlying mechanism. METHODS: Myocardial infarction was performed by ligation of left anterior descending coronary artery (LAD) in male Wistar rats. Rats with myocardial infarction were treated with GXD (1.14 g/kg, 4.53 g/kg) daily for 4 weeks. Cardiac function was evaluated by echocardiography. Hemodynamic parameters and infarct size were measured in each group. Myocardial enzymes were examined by biochemical tests. Inflammatory cytokines were assessed by ELISA, and interrelated proteins were detected by western blot. RESULTS: Cardiac function was significantly improved in GXD-treatment rats after myocardial infarction (MI), which was accompanied with decreased infarct size. Administration of GXD to myocardial fibrosis rats significantly ameliorated the activities of AST, LDH and CK-MB in serum. The increase in inflammatory factors (TNF-α, IL-1ß) were markedly reduced upon GXD treatment. Furthermore, the inflammatory mediators (NF-κB p65, TNF-α, MCP-1) were down-regulated by GXD in the myocardial fibrosis rats. CONCLUSIONS: Treatment with GXD improved cardiac function induced by myocardial fibrosis by inhibiting expression of inflammatory mediators associated with NF-κB.

Biotransformation and metabolic profile of caudatin-2,6-dideoxy-3-O-methy-ß-d-cymaropyranoside with human intestinal microflora by liquid chromatography quadrupole time-of-flight mass spectrometry.

In our previous studies, caudatin-2,6-dideoxy-3-O-methy-ß-d- cymaropyranoside (CDMC) was for the first time isolated from Cynanchum auriculatum Royle ex Wightand and was reported to possess a wide range of biological activities. However, the routes and metabolites of CDMC produced by intestinal bacteria are not well understood. In this study, ultra-performance liquid chromatography/quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF-MS) technique combined with Metabolynx(TM) software was applied to analyze metabolites of CDMC by human intestinal bacteria. The incubated samples collected for 48 h in an anaerobic incubator and extracted with ethyl acetate were analyzed by UPLC-Q-TOF-MS within 12 min. Eight metabolites were identified based on MS and MS/MS data. The results indicated that hydrolysis, hydrogenation, demethylation and hydroxylation were the major metabolic pathways of CDMC in vitro. Seven strains of bacteria including Bacillus sp. 46, Enterococcus sp. 30 and sp. 45, Escherichia sp. 49A, sp. 64, sp. 68 and sp. 75 were further identified using 16S rRNA gene sequencing owing to their relatively strong metabolic capacity toward CDMC. The present study provides important information about metabolic routes of CDMC and the roles of different intestinal bacteria in the metabolism of CDMC. Moreover, those metabolites might influence the biological effect of CDMC in vivo, which affects the clinical effects of this medicinal plant.

Gualou xiebai decoction ameliorates cardiorenal syndrome type II by regulation of PI3K/AKT/NF-κB signalling pathway.

BACKGROUND: Cardiorenal syndromes type II (CRS2) is a multi-organ ailment that manifests as a combination of cardiac and renal dysfunction, resulting in chronic kidney disease due to chronic cardiac insufficiency. It affects at least 26 million people worldwide, and its prevalence is increasing. Gualou Xiebai Decoction (GXD), a traditional Chinese medicine (TCM) with a rich history of application in the management of coronary artery disease, has been explored for its potential therapeutic benefits in CRS2. Nevertheless, the mechanism by which GXD alleviates CRS2 remains obscure, necessitating further investigation. PURPOSE: The aim of this study was to assess the effects of the ethanolic extract of GXD on CRS2 and to elucidate the underlying mechanism in a rat model of myocardial infarction, offering a potential target for clinical treatment for CRS2. STUDY DESIGN AND METHODS: A rat model of CRS2 was induced by surgical myocardial infarction and treated with GXD for 10 weeks. Cardiac function was assessed using echocardiography, while serum and urine biochemistry were analyzed to evaluate potential cardiac and renal damage. Furthermore, tissue samples were obtained for histological, protein, and genetic investigations. In addition, network pharmacology analysis and molecular docking were utilized to predict the primary active compounds, potential therapeutic targets, and interventional pathways through which GXD could potentially exert its effects on CRS2. Subsequently, these predictions were confirmed in vivo and vitro through various analyses. RESULTS: The current investigation employed echocardiography to exhibit the apparent cardiac remodeling following the induction of myocardial infarction. Damage to the heart and kidneys of CRS2 rats was effectively ameliorated by administration of GXD. The outcomes derived from the analyses of HE and Masson staining indicated that the pathological damage to the heart and kidney tissues of rats in the GXD groups was considerably alleviated. Using network pharmacology analysis, AKT1, IL-6, and TNF-α were identified as plausible therapeutic targets for the treatment of CRS with GXD. Subsequent functional and pathway enrichment analysis of the underlying targets disclosed that the PI3K/AKT/NF-κB signaling pathway may be involved in the mechanism of GXD in the treatment of CRS2. Immunohistochemical, western blot, RT-PCR and immunofluorescence staining were employed to demonstrate that GXD can regulate the PI3K/AKT/NF-κB signaling pathway in the CRS2 rat model. Ultimately, administration of the PI3K/AKT agonist 740Y-P counteracted the effect of diosmetin, which was one of the potential active components of GXD analysed by compound-target-disease network, on p-PI3K and p-AKT in vitro. CONCLUSIONS: The findings of this study suggest that GXD improves cardiac and renal function in CRS2 rats and that the underlying mechanism involves inhibition of the PI3K/AKT/NF-κB pathway.

Caudatin-2,6-dideoxy-3-O-methy-ß-D-cymaropyranoside 1 induced apoptosis through caspase 3-dependent pathway in human hepatoma cell line SMMC7721.

Caudatin-2,6-dideoxy-3-O-methy-ß-D-cymaropyranoside (CDMC), the C-21 steroidal glycoside recently extracted from the traditional Chinese medicinal plant, the root of Cynanchum auriculatum Royle ex Wight (Asclepiadaceae), has been shown to possess potent antitumor properties. However, the bioactivities of CDMC are still largely unknown, especially the antitumor effect and its mechanism. This study investigated the CDMC antitumor effects on human hepatoma cell line SMMC7721 cells by analysis of cell viability, cell cycle phases and apoptosis. The results showed that CDMC inhibited the growth of SMMC7721 cells in a time- and dose-dependent manner and resulted in cell cycle arrest in G(0)/G(1) phase. Furthermore, CDMC induced SMMC7721 cell apoptosis rather than necrosis through caspase 3 activation, and a caspase 3 inhibitor, Ac-DEVD-CHO, could attenuate the apoptosis induced by CDMC. The results suggested that the anticancer activity of CDMC could be attributed partially to its inhibition of cell proliferation and induction of apoptosis associated with caspase 3 activation.

Effect of sulfur-fumigation process on ginseng: Metabolism and absorption evidences.

ETHNOPHARMACOLOGICAL RELEVANCE: Sulfur-fumigation has been developed to prevent insects and molds during post-harvest handling of Panax ginseng C.A. Mey (ginseng) in the near decades. Our previous study indicated sulfur-fumigation could transform ginsenosides, the active components of ginseng, into sulfur-containing derivatives (SFCDs), the artifacts with unknown toxicity. However, whether the biotransformation could be occurred and absorption characteristics between ginsenosides and SFCDs are still needed to further investigate. AIM OF THE STUDY: To evaluate the effect of sulfur-fumigation process on ginseng through comparing the metabolic profile and absorption characteristics between ginsenoside Rg1, Re and their SFCDs. MATERIALS AND METHODS: Intestinal microflora and liver S9 fraction were utilized to compare the metabolic profile, and single-pass intestinal perfusion and Caco-2 cell models were applied to compare the absorption characteristics, between Rg1, Re and their SFCDs. RESULTS: Rg1 and Re were metabolized to 7 none sulfur-containing metabolites, while their SFCDs were metabolized to 18 sulfur-containing metabolites. The intestinal absorption and transport of Rg1 and Re were much greater than their SFCDs. Besides, the uptakes of Rg1 and Re were transport-dependent, but their SFCDs were non-transport-dependent. CONCLUSION: Ginsenosides and their SFCDs could not be bio-transformed with each other and their absorption characteristics were quite different, which suggested that sulfur-fumigation is not a feasible post-harvest process of ginseng.

Baishouwu Extract Suppresses the Development of Hepatocellular Carcinoma via TLR4/MyD88/NF-κB Pathway.

Purpose: The root of Cynanchum auriculatum Royle ex Wight, known as Baishouwu, has been widely used for a tonic supplement since ancient times. The current study was performed to explore the effect of Baishouwu extract on the development of experimental hepatocellular carcinoma (HCC) and the potential mechanism involved. Methods: Rats were injected diethylnitrosamine (DEN) to initiate the multistep hepatocarcinogenesis. Animals were treated concurrently with Baishouwu extract given daily by oral gavage for 20 weeks to evaluate its protective effects. Time series sera and organ samples from each group were collected to evaluate the effect of Baishouwu extract on hepatic carcinogenesis. Results: It was found that Baishouwu extract pretreatment successfully attenuated liver injury induced by DEN, as shown by decreased levels of serum biochemical indicators (AST, ALT, ALP, TP, and T-BIL). Administration of Baishouwu extract inhibited the fibrosis-related index in serum and live tissue, respectively from inflammation stage to HCC stage after DEN treatment. It significantly reduced the incidence and multiplicity of DEN-induced HCC development in a dose-dependent manner. Macroscopic and microscopic features suggested that pretreatment with Baishouwu extract for 20 weeks was effective in inhibiting DEN-induced inflammation, liver fibrosis, and HCC. Furthermore, TLR4 overexpression induced by DEN was decreased by Baishouwu extract, leading to the markedly down-regulated levels of MyD88, TRAF6, NF-κB p65, TGF-ß1 and α-SMA in hepatitis, cirrhosis, and hepatocarcinoma. Conclusion: In conclusion, Baishouwu extract exhibited potent effect on the development of HCC by altering TLR4/MyD88/ NF-κB signaling pathway in the sequence of hepatic inflammation-fibrosis-cancer, which provided novel insights into the mechanism of Baishouwu extract as a candidate for the pretreatment of HCC in the future.

[Study on Cornu Bos grunniens from Tibet substituting Cornu Rhinoceri].

OBJECTIVE: Comparing the pyretolysis effect of Cornu Rhinoceri Soup, an ancient prescription of Traditional Chinese Medicine, on fever model of rabbits after Cornu Bos grunniens from Tibet substituting Cornu Rhinoceri, in order to find the succedaneums of Cornu Rhinoceri, a rare animal medicine. METHODS: The fever model was made by over-due Triple-Vaccine i.v. through the vein of rabbit in edge ear. 1 hour later, the different decoctions i.g. in different groups of rabbits, then detecting the dynamic changes of body temperature in fever rabbits. RESULTS: 1 hour after the decoction i.g., there were significant pyretolysis effects in the Cornu Bos grunniens groups of rabbits with large and small dosage (P < 0.05 or 0.01). After 2h,the same effect showed in the Cornu Bubali group with large dosage (P < 0.05 or 0.01) and 3h later in small one. In the groups of Cornu Rhinoceri, large dosage i.g. 1 h later, the rising amplitude of body temperature in fever rabbits was slower comparing to the model group. 2h later, there were the same effects as other groups. CONCLUSION: The pyretolysis effect of Cornu Rhinoceri Soup on fever model rabbits is as same as it of which containing Cornu Bos grunniens instead of Cornu Rhinoceri. It means that the Cornu Bos grunniens from Tibet could be the substitution of Cornu Rhinoceri.

Hepatic inflammation-fibrosis-cancer axis in the rat hepatocellular carcinoma induced by diethylnitrosamine.

PURPOSE: Hepatocellular carcinoma (HCC) cases are closely associated with chronic inflammation and fibrosis which is known as hepatic inflammation-fibrosis-cancer (IFC) axis. The aim of this study is to elucidate the development characteristics of the rat HCC model based on IFC axis. METHODS: The diethylnitrosamine (DEN)-induced rat HCC, which presents a stepwise histopathological progression that is similar to human HCC, was used to analyze the features of the different stages (inflammation, fibrosis, cancer). Rats were injected DEN at a dose of 30 mg/kg body weight twice a week for 11 weeks and the animals were observed until week 20. Time series sera and organ samples from the DEN animal model were collected to evaluate the dynamic changes. RESULTS: It was found that serum biochemical indicators (AST, ALT, ALP, TP, T-BIL, IL-6, TNF-α) from DEN-treated group were higher than that from control group. Fibrosis-related index in serum and live tissue were increased, respectively, from week 4 after DEN treatment. The expression of TGF-ß1 and α-SMA in DEN-treated group was higher than that in control group. JAK2/STAT3 signaling was significantly up-regulated in DEN-treated group compared to that in control group. The histological examination confirmed that the hepatocarcinogenesis model was successfully established, and 100% of the animals in the DEN-exposed group developed liver tumors at 20 weeks. According to the pathological changes, the model characterized resulted in three stages: the inflammation stage (week 2-6), the fibrosis stage (week 8-12), and the HCC stage (week 14-20). CONCLUSIONS: The results suggested that the HCC development was associated with IFC axis. The serial progression of hepatocarcinogenesis was according to the sequence of hepatic inflammation, fibrosis and then hepatic tumor.

Gualou Xiebai Decoction prevents myocardial fibrosis by blocking TGF-beta/Smad signalling.

OBJECTIVES: The present study is aimed to investigate the effect of Gualou Xiebai Decoction (GXD) ethanol extract on myocardial fibrosis and clarify the possible mechanism. METHODS: Rats with ligated left anterior descending coronary artery were treated with GXD ethanol extract (1.14 g/kg, 2.27 g/kg, 4.53 g/kg) daily via gavage for 4 weeks. Histopathological changes and collagen distribution were evaluated by haematoxylin and eosin and Masson staining. The mRNA levels of Collagen I and Collagen III were detected by real-time PCR. The expressions of TGF-ß1, TGFß receptor (TGFßR)I, TGFßRII, P-Smad2/3 and Smad7 were determined by Western blot. RESULTS: GXD treatment was significantly reduced the heart weight/body weight ratio (P < 0.05) as well as the left ventricle weight/body weight ratio (P < 0.05). It also significantly alleviated the degree of inflammation, decreased myocardial collagen volume fraction (P < 0.05 ∼ 0.01), together with markedly prevented the upregulations of Collagen I and Collagen III (P < 0.05 ∼ 0.01). Moreover, GXD downregulated expressions of TGF-ß1, TGFßRI, TGFßRII, Smad2/3 whereas improved Smad7 expression in the myocardial fibrosis rats. CONCLUSIONS: GXD ameliorates myocardial fibrosis induced by cardiac infarction with ligated left anterior descending coronary artery, the mechanism maybe involve in inhibiting the TGF-ß1 signalling pathway.