Introduction: Che day (Ampelopsis Cantoniensis Planch) is a medicinal herb that has been used for a long time in Vietnamese Traditional Medicine for treating gastroduodenal ulcer. Scientific studies found that Che day has some chemical components such as flavonoids, tannins and uronic compounds that can neutralize the gastric acidity. Objectives: This study was conducted with the aim of evaluating the H pylori eradication ability and the anti-inflammation properties of Che day for duodenal ulcer, using histopathological measures. Subjects and method: 43 patients with endoscopy-confirmed diagnosis of duodenal ulcer were involved in the opening clinical trial. Ages of patients were ranged from 18 to 65 years old. The patients were treated for 6 weeks by dried extracts of Che day (four 5gr-sachets divided into 4 times a day) and underwent endoscopic biopsy before and post-treatment. Results: Che day had the HP eradication effect in 17/43 patients (42.5%), as seen in histophathological examinations. This results were significant with p <0.001. The rate of recovering patients reached up to 23.26% (10/43 patients) and the rate of severe cases reduced dramatically (18/20 patients). The comparison before and after 6 weeks of treatment showed the prevention effect of Che day from gastritis with statistic significance (p<0.001). Conclusion: Che day has the HP eradication ability with the rate reaching up to 42.5%. This herb reduced the gastritis in histopathological studies. 23.26% of patients recovered from duodenal ulcer after treatment and the severe cases were dramatically reduced.
Ampelopsis Cantoniensis Planch ; Duodenal ulcer ; Gastritis ; Helicobacter pylori

OBJECTIVETo observe the effect of serum containing Tengcha total flavonoid and dihydromyricetin on proliferation and apoptosis of HepG2 cells.

METHODSerum containing respectively Tengcha total flavonid, dihydromyricetins and CTX and control serum were prepared by serological pharmacology method. MTT assay was used to observe the proliferation inhibition rate of HepG2 cells after incubated with different kinds of serum. Inverted microscope was utilized to observe the morphological changes after HepG2 cells were treated with different serum. AnnexinV/7AAD double label method was used to detect earlier period apoptosis cells.

RESULTBoth serum containing 20% Tengcha total flavonid and serum containing 20% dihydromyricetin could restrain the HepG2 cells proliferation at different levels and the morpholological changes of apoptosis were observed. AnnexinV/7AAD double label method showed that the earlier period apoptosis cells rates were increased by serum containing 20% Tengcha total flavonoid, but serum containing 20% dihydromyricetin did not show influence on the earlier period apoptosis cells.

CONCLUSIONTengcha total flavonoid can restrain the HepG2 cells proliferation and induce earlier period apoptosis cells.

Ampelopsis ; chemistry ; Animals ; Apoptosis ; drug effects ; Cell Proliferation ; drug effects ; Flavonoids ; blood ; pharmacology ; Flavonols ; blood ; pharmacology ; Hep G2 Cells ; drug effects ; Humans ; Male ; Rats ; Rats, Wistar

BACKGROUND: Keratinocytes are the major cells in epidermis, providing barrier components such as cornified cells through the sophisticated differentiation process. In addition, keratinocytes exerts their role as the defense cells via activation of innate immunity. It has been known that pathogen-associated molecular patterns (PAMPs) including double-strand RNA and nucleotides can provoke inflammatory reaction in keratinocytes. OBJECTIVE: The aim of this study is to evaluate the effect of Ampelopsis japonica Makino extract (AE) on PAMPs-induced inflammatory reaction of keratinocytes. METHODS: The effects of AE were determined using poly (I:C)-induced inflammation and imiquimod-induced psoriasiform dermatitis models. RESULTS: In cultured keratinocytes, AE significantly inhibited poly(I:C)-induced expression of inflammatory cytokines, such as interleukin (IL)-1β, IL-6, IL-8 and tumor necrosis factor-α. AE significantly inhibited poly(I:C)-induced release of caspase-1 active form (p20), and down-regulated nuclear factor-κB signaling pathway. In imiquimod-induced psoriasiform dermatitis model, topical application of AE resulted in significant reduction of epidermal hyperplasia. CONCLUSION: These results suggest that AE may be a potential candidate for the treatment of skin inflammation.
Ampelopsis* ; Cytokines ; Dermatitis ; Epidermis ; Hyperplasia ; Immunity, Innate ; Inflammation ; Interleukin-6 ; Interleukin-8 ; Interleukins ; Keratinocytes* ; Necrosis ; Nucleotides ; Pathogen-Associated Molecular Pattern Molecules* ; RNA ; Skin

OBJECTIVEWe have evaluated the direct effect of ampelopsis (APS) on duck hepatitis B virus (DHBV) replication in ducklings in vivo.

METHODOne-day-old ducklings were infected with DHBV. After infection for 7 days, the animals were treated with APS at dosages of 70, 150, 300 mg x kg(-1) of body weight via the oral route. The drug was given twice per day for 10 days continuously, and normal saline was used as control. The blood was drawn from the posterior tibial vein of all ducks before treatment (T0), after the medication for 5 (T5), 10 (T10) days and withdrawal of the drug for 3 days (P3). DHBV DNA in duck serum was detected by dot blot.

RESULTThe duck serum DHBV-DNA levels were reduced in the group of APS (150, 300 mg x kg(-1)) after treated for 5 and 10 days and the levels of DHBV-DNA did not markedly relapse in both groups of APS after withdrawal of the drug for 3 days. We provide the first evidence that APS can efficiently inhibits DHBV replication in ducks in vivo.

CONCLUSIONAPS therefore warrants further investigation as a potential therapeutic agent for HBV infections.

Ampelopsis ; chemistry ; Animals ; Antiviral Agents ; pharmacology ; DNA, Viral ; metabolism ; Drugs, Chinese Herbal ; pharmacology ; Ducks ; blood ; virology ; Hepatitis B Virus, Duck ; drug effects ; metabolism ; physiology ; Virus Replication ; drug effects

AIMTo assess the antioxidative properties and the mechanism of action of dihydromyricetin (DMY) from Ampelopsis grossedentata.

METHODSThe antioxidative properties of DMY were measured by scavenging 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) and inhibiting lipid peroxidation induced by FeSO4-edetic acid in linoleic acid. The mechanism of antioxidative properties of DMY was tested by measuring the chelating activities of DMY for Fe2+ with ultraviolet spectrum (UV) method.

RESULTSThe specific absorption of DPPH radical solution at 517 nm was reduced 73.3%-91.5% when DMY was added into the reaction solution in the concentration range from 0.01% to 0.04%. DMY was shown to greatly inhibit the increase of lipid peroxidation (LPO) values in linolei acid system catalyzed by FeSO4-edetic acid. The reaction rates (A532.min-1) of lipid peroxidation were 0.0021-0.0004 in the concentration range from 0.01% to 0.04% and the inhibition activities of DMY was found to be in a concentration-dependent manner. The mechanism of antioxidative properties of DMY was chelating Fe2+ in the Fe(2+)-dependent lipid peroxidation system.

CONCLUSIONDMY showed great antioxidative effect and would be a good natural antioxidant.

Ampelopsis ; chemistry ; Antioxidants ; isolation & purification ; pharmacology ; Chelating Agents ; pharmacology ; Flavonols ; chemistry ; isolation & purification ; pharmacology ; Free Radical Scavengers ; isolation & purification ; pharmacology ; Lipid Peroxidation ; drug effects ; Molecular Structure ; Plants, Medicinal ; chemistry

OBJECTIVETo study the effects of Dihydromyricetin (DMY) on antilipid-peroxidation.

METHODThe antilipid-peroxidation of DMY on heart, liver, brain tissue homogenate and mitochondria was measured by the determination of malondiadehyde (MDA) induced by Fe2+ -Vit C, Fe2+ -H2O2, Fe-Cys with TBA spectrometric method.

RESULTDMY could inhibit the lipid peroxidation of homogenate and mitochondria. The inhibition exhibited concentration-dependent manner.

CONCLUSIONDMY has good antilipid-peroxidation effect, which is worth studing further.

Ampelopsis ; chemistry ; Animals ; Antioxidants ; isolation & purification ; pharmacology ; Brain ; metabolism ; Dose-Response Relationship, Drug ; Flavonols ; isolation & purification ; pharmacology ; Lipid Peroxidation ; drug effects ; Liver ; metabolism ; Male ; Malondialdehyde ; metabolism ; Mitochondria ; metabolism ; Mitochondrial Swelling ; drug effects ; Myocardium ; metabolism ; Plants, Medicinal ; chemistry ; Rats

OBJECTIVE: To investigate the anti-inflammatory potential of Ampelopsis japonica on contact dermatitis (CD). METHODS: A total of 38 Balb/c mice were divided into 5 groups by using a random number table: normal mice (n=6), CD model mice (n=8), CD mice treated with 3 or 30 mg/kg of the ethanol extract of A. japonica (EEAJ, n=8) and 7.5 mg/kg dexamethasone treated CD mice (DEX, n=8). CD was induced using topical application of 1-fluoro-2,4-dinitrofluorobenzene in mice. EEAJ and DEX were topically applied to the shaved skin of each mouse for 6 days, and the effects of EEAJ and DEX on skin lesions and color, histopathological abnormalities such as epidermal hyperplasia and immune cell infiltration, and tumor necrosis factor (TNF)-α, interleukin-6 (IL-6), and monocyte chemoattractant protein-1 (MCP-1) production were investigated. The effects on changes in body weights and spleen/body weight ratio were also investigated. RESULTS: EEAJ at 30 mg/kg significantly prevented scaling, erythema and enlargement of skin weight compared to using carbon dioxide. EEAJ also prevented epithelial hyperplasia and immune cell infiltrations induced by repeated application of DNFB (P<0.01). In addition, EEAJ significantly lowered levels of TNF-α, IL-6 and MCP-1 (P<0.05 or P<0.01). The anti-inflammatory effects of EEAJ were similar to those of DEX. CONCLUSION A. japonica may be a new therapeutic agent with the potential to reduce or replace corticosteroids and its mechanisms are closely related to regulation of TNF-α production.
Ampelopsis ; Animals ; Anti-Inflammatory Agents/therapeutic use* ; Cytokines ; Dermatitis, Contact/pathology* ; Dinitrofluorobenzene/therapeutic use* ; Hyperplasia/drug therapy* ; Interleukin-6 ; Mice ; Mice, Inbred BALB C ; Plant Extracts/therapeutic use* ; Tumor Necrosis Factor-alpha

OBJECTIVETo study hypoglycemic action of total flavone (GXTF) of Ampelopsis grossedentata from Guangxi by observing the effects of GXTF on blood glucose levels in many strain animal models.

METHODThe blood glucose levels in many strain animal models were determined after oral administration, with the models of diabetes induced by alloxan, of hyperglycemic mice induced by epinephrine and glucose, and normal mice.

RESULTGXTF had better therapeutical action on diabetes mice induced by alloxan, and could significantly lowered the blood glucose levels of hyperglycemic mice induced by epinephrine and glucose, but had no significant effects on blood glucose levels of normal mice. Acute toxicity test showed that the maximum oral dosage is 26.0 g.kg-1.

CONCLUSIONGXTF has better hypoglycemic effect on many strain animal models and toxicity is vary small.

Ampelopsis ; chemistry ; Animals ; Blood Glucose ; metabolism ; China ; Diabetes Mellitus, Experimental ; blood ; Drugs, Chinese Herbal ; isolation & purification ; pharmacology ; Epinephrine ; antagonists & inhibitors ; Female ; Flavonoids ; isolation & purification ; pharmacology ; Glucose ; antagonists & inhibitors ; Hypoglycemic Agents ; isolation & purification ; pharmacology ; Mice ; Plant Leaves ; chemistry ; Plant Stems ; chemistry ; Plants, Medicinal ; chemistry

The present study investigated the mechanism of total flavonoids from Ampelopsis grossedentata(AGTF) against gouty arthritis(GA) by network pharmacology and experimental validation. The main active ingredients and targets of AGTF, as well as disease targets, were screened out using relevant databases and literature data. The "protein-protein interaction"(PPI) network and "drug-ingredient-target-pathway" network were constructed, and the potential targets and mechanism of AGTF against GA were predicted. The hyperuricemia(HUA) combined with GA model was induced in rats. The gait behaviors of rats were scored, and ankle swelling degree was observed. The uric acid(UA) level and xanthine oxidase(XOD) activity in the rat serum were detected, and the levels of interleukin-1β(IL-1β), interleukin-6(IL-6), and tumor necrosis factor-α(TNF-α) were measured. The protein expression of toll-like receptor 4(TLR4), myeloid differentiation factor 88(MyD88), and nuclear factor-kappa B(NF-κB) in the synovial tissues of the rat ankle joint was determined by immunohistochemistry. Ten active ingredients of AGTF and 73 candidate targets of AGTF against GA were screened out by network pharmacology. Eighty-six signaling pathways were enriched, including TNF signaling pathway, NF-κB signaling pathway, TLR signaling pathway, Nod-like receptor signaling pathway, and purine metabolism signaling pathway, which were closely related to AGTF against GA. Animal experimental results showed that AGTF could effectively improve the abnormal gait behaviors of GA rats, relieve ankle inflammation, and reduce ankle joint swelling. In addition, AGTF could significantly reduce UA level, inhibit XOD activity, decrease TNF-α, IL-6, and IL-1β content, and down-regulate the expression of TLR4, MyD88, and NF-κB in ankle synovial tissues(P<0.05, P<0.01). The results of network pharmacology and experimental validation are consistent, indicating that AGTF exerts its therapeutic effect on GA by regulating UA metabolism, improving abnormal UA level, reducing the release of inflammatory factors, and regulating immunity and the TLR4/MyD88/NF-κB inflammatory pathway.
Ampelopsis/chemistry* ; Animals ; Arthritis, Gouty/drug therapy* ; Flavonoids/therapeutic use* ; Interleukin-1beta/metabolism* ; Interleukin-6/metabolism* ; Myeloid Differentiation Factor 88/metabolism* ; NF-kappa B/metabolism* ; NLR Proteins/metabolism* ; Rats ; Toll-Like Receptor 4/metabolism* ; Tumor Necrosis Factor-alpha/metabolism* ; Uric Acid ; Xanthine Oxidase

OBJECTIVETo investigate the anti-HIV effects of ampelopsin and its interaction with HIV-1 coreceptor CXCR4.

METHODSThrough anti-virus experiments in vitro, the inhibitory effect of ampelopsin on HIV-1 infection was verified. Chemotaxis assay was performed to show the ability to induce PBMCs migration by ampelopsin, RANTES and SDF-1alpha. Fluorescence labelling monoclonal antibody was utilized to observe the interaction of ampelopsin and CXCR4. Mice immunosuppressant model was also established to detail the role ampelopsin played in regulating cellular immunological functions.

RESULTSAmpelopsin could protect sensitive cells against HIV-1 infection and dramatically reduce HIV-1 antigen P24 expression. HIV-1SF33 attaching to MT-4 cells was interfered by ampelopsin, and the EC50 was 0.175 mg/mL for cellular protection and 0.024 mg/mL for P24 inhibition. At co-cultivating phase, EC50 was 0.229 mg/mL and 0.197 mg/mL respectively. Furthermore, the EC50 was 0.179 mg/mL and 0.348 mg/mL in acute infection. Human PBMCs migration was induced after being challenged with ampelopsin or chemokines, and synergistic action was observed during co-treatment. Ampelopsin alone resulted in maximal chemotaxis at 1 mg/mL. HIV-1 co-receptor CXCR4 on the surface of PBMCs was decreased by internalization, which indicated the effect of ampelopsin on CXCR4. About 70% CXCR4 was reduced by ampelopsin at 1 mg/mL. Ampelopsin also augmented cellular immunological functions in immunosuppressive mice.

CONCLUSIONAmpelopsin displays a strong inhibitive role during HIV-1 absorption, incubation and acute infection. These results are coincident with its immune enhancement.

Ampelopsis ; chemistry ; Animals ; Anti-HIV Agents ; pharmacology ; Cell Line ; Chemokine CCL5 ; pharmacology ; Chemokine CXCL12 ; Chemokines, CXC ; pharmacology ; Chemotaxis, Leukocyte ; Down-Regulation ; Drugs, Chinese Herbal ; Flavonoids ; economics ; isolation & purification ; pharmacology ; HIV Infections ; virology ; HIV-1 ; drug effects ; metabolism ; pathogenicity ; Humans ; Interleukin-2 ; biosynthesis ; Leukocytes, Mononuclear ; drug effects ; Mice ; Mice, Inbred BALB C ; Models, Animal ; Plant Roots ; chemistry ; Receptors, CXCR4 ; antagonists & inhibitors ; drug effects ; Spleen ; immunology ; T-Lymphocytes ; immunology