China ; epidemiology ; Humans ; Rickettsia Infections ; epidemiology ; Seroepidemiologic Studies

It is now well established that inflammation plays an important role in the development of numerous chronic metabolic diseases including insulin resistance (IR) and type 2 diabetes (T2DM). Skeletal muscle is responsible for 75% of total insulin-dependent glucose uptake; consequently, skeletal muscle IR is considered to be the primary defect of systemic IR development. Our pre- vious study has shown that rutaecarpine (Rut) can benefit blood lipid profile, mitigate inflammation, and improve kidney, liver, pan- creas pathology status of T2DM rats. However, the effects of Rut on inflammatory cytokines in the development of IR-skeletal muscle cells have not been studied. Thus, our objective was to investigate effects of Rut on inflammatory cytokines interleukiri (IL)-1, IL-6 and tumor necrosis factor (TNF)-α in insulin resistant primary skeletal muscle cells (IR-PSMC). Primary cultures of skeletal muscle cells were prepared from 5 neonate SD rats, and the primary rat skeletal muscle cells were identified by cell morphology, effect of ru- taecarpine on cell proliferation by MTT assay. IR-PSMC cells were induced by palmitic acid (PA), the glucose concentration was measured by glucose oxidase and peroxidase (GOD-POD) method. The effects of Rut on inflammatory cytokines IL-1, IL-6 and TNF-α in IR-PSMC cells were tested by enzyme-linked immunosorbent assay (ELISA) kit. The results show that the primary skeletal muscle cells from neonatal rat cultured for 2-4 days, parallel alignment regularly, and cultured for 7 days, cells fused and myotube formed. It was shown that Rut in concentration 0-180. 0 μmol x L(-1) possessed no cytotoxic effect towards cultured primary skeletal muscle cells. However, after 24 h exposure to 0.6 mmol x L(-1) PA, primary skeletal muscle cells were able to induce a state of insulin resistance. The results obtained indicated significant decrease (P < 0.05 to P < 0.001) IL-1, IL-6 and TNF-α production by cultured IR-PSMC cells when incubating 24 hours with Rut, beginning from 20 to 180.0 μmol x L(-1). IL-1, IL-6 and TNF-α in the Rut treated groups were dose-dependently decreased compared with that in the IR-PSMC control group. Our results demonstrated that the Rut promoted glucose consumption and improved insulin resistance possibly through suppression of inflammatory cytokines in the IR-PSMC cells.
Animals ; Cell Proliferation ; drug effects ; Cytokines ; metabolism ; Female ; Glucose ; metabolism ; Indole Alkaloids ; pharmacology ; Inflammation ; metabolism ; Insulin Resistance ; Male ; Muscle, Skeletal ; cytology ; drug effects ; metabolism ; Quinazolines ; pharmacology ; Rats

AIM: To study the chemical constituents of Siegesbeckia pubescens. METHODS: The chemical constituents were isolated by extraction, crystallization and various chromatographic methods, and the chemical structures were elucidated on the basis of spectral analysis. In addition, the cytotoxic activity of compound 1 was evaluated using human lung cancer cell A 549. RESULTS: Four compounds were obtained, and their structures were identified as (E)-3-(3-oxobut-1-enyl)phenyl dimethylcarbamate (1), ent-2-oxo-15, 16, 19-trihydroxypimar-8(14)-ene (2), 16-acetylkirenol (3), 3, 7-dimethylquercetin (4). CONCLUSION Compound 1 is a new carbamate, and the IC(50) in MTT method of compound 1 was 58 μg·mL(-1).
Antineoplastic Agents, Phytogenic ; isolation & purification ; pharmacology ; therapeutic use ; Asteraceae ; chemistry ; Carbamates ; isolation & purification ; pharmacology ; therapeutic use ; Cell Line, Tumor ; Humans ; Inhibitory Concentration 50 ; Lung Neoplasms ; drug therapy ; Molecular Structure ; Phytotherapy ; Plant Components, Aerial ; chemistry ; Plant Extracts ; chemistry ; pharmacology ; therapeutic use ; Quercetin ; analogs & derivatives ; isolation & purification

Adolescent ; Altitude ; Brain ; drug effects ; Codonopsis ; chemistry ; Drugs, Chinese Herbal ; pharmacology ; Humans ; Tablets

Objective To investigate the in vivo gene expression of adenovirus-mediated human tissue factor pathway inhibitor (hTFPI) and its inhibition effects on intimal proliferation in rabbit carotid arteries after ballon injury. Methods Rabbits underwent carotid artery balloon injuries were treated with Ad-TFPI (n=25), Ad-LacZ (n=25) or PBS (n=10), respectively. Sham operated rabbits (n=10) serve as normal controls. The expressions of human TFPI at mRNA and protein levels were detected by RT-PCR and ELISA respectively on the 3rd, 7th, 10th, 14th, 28th day after operation. Intimal proliferation was detected by angiograms and morphometric analysis. Results TFPI mRNA and protein expressions were detected at 3 days and peaked at the 10th and 14th day after TFPI gene transfer. The expressions were still detectable on the 28th day. There was no TFPI expression in Ad-LacZ group. The carotid angiogram results indicated that the minimal lumen diameter in TFPI group was significantly larger and the lumina stenosis percentage was significantly lower in TFPI group compared those in Ad-LacZ and PBS groups (all P < 0.05). The morphometric analysis showed that the intimal area, the ratio of the intimal/media area, the lumina stenosis percentage in TFPI group were all significantly reduced compared with those in Ad-LacZ and PBS groups (all P<0.01).Conclusions The TFPI gene could be effectively transferred by adenovirus vector to injured carotid arteries in rabbits.

OBJECTIVETo explore the effect of titanium dioxide (TiO₂) nanoparticles on hemogram in rats with gastric ulcer.

METHODSPhysicochemical properties of TiO₂ nanoparticles were characterized. Twenty-four clear class SD male rats, aging 8 week-old, were randomly divided into 4 groups, 6 rats for each group. 20% acetic acid were injected into the rats' stomach on the border of gastric body and pyloric antrum, and hereby established the gastric ulcer model. The rats in 4 groups were exposed to TiO₂ nanoparticles through intragastric administration at 0, 10, 50 and 200 mg/kg body weight respectively for 30 days. Afterwards, the rats were conducted blood routine test and blood coagulation test for analysis.

RESULTSTiO₂ nanoparticles were anatase crystals, closely spherical shape, whose average grain diameter was (75 ± 15) nm. The levels of white blood cell (WBC) count ((8.48 ± 3.28)×10⁹/L), lymphocyte (LYM) ((6.85 ± 2.53)×10⁹/L), monocyte (MOD) ((0.27 ± 0.12)×10⁹/L), granulocyte (GRN) ((1.37 ± 0.86)×10⁹/L), red blood cell (RBC) ((8.20 ± 0.49)×10⁹/L) and hematocrit (HCT) ((45.3 ± 1.4)%) in the 200 mg/kg dose group were significantly higher than those in the control group ((2.63 ± 0.34)×10⁹/L, (2.25 ± 0.26)×10⁹/L, (0.05 ± 0.06)×10⁹/L, (0.33 ± 0.26)× 10⁹/L, (4.87 ± 2.37)×10⁹/L and (27.2 ± 13.3)%, respectively; t values were -3.449, -3.825, -3.554, -3.097, -2.972 and -2.936 respectively, P values all < 0.05). The levels of WBC ((6.88 ± 3.06)×10⁹/L), MOD ((0.20 ± 0.07)×10⁹/L), RBC ((7.79 ± 0.48)×10⁹/L) and HCT ((42.7 ± 2.8)%) in 50 mg/kg dose group were also statistically higher than those in the control group (t values were -2.507, -2.367, -2.605 and -2.511 respectively, all P values < 0.05). There was no statistically difference found in other blood routine index and coagulation index between the three experimental groups and control group.

CONCLUSIONThe long term intake of TiO₂ nanoparticles caused a statistically increase in the amount of WBC and RBC in rats with gastric ulcer; however, there was no obvious changes found in blood platelet and coagulation index.

Animals ; Hematologic Tests ; Male ; Metal Nanoparticles ; adverse effects ; Rats ; Rats, Sprague-Dawley ; Stomach Ulcer ; blood ; Titanium ; adverse effects

Adult ; Aged ; Carcinoma, Hepatocellular ; genetics ; pathology ; Female ; Gene Expression ; Humans ; Intercellular Signaling Peptides and Proteins ; genetics ; Liver Neoplasms ; genetics ; pathology ; Male ; Middle Aged ; Neoplasm Metastasis ; RNA, Messenger ; genetics ; Young Adult

Objective To introduce the double scanning for producing computer aided design and computer aided manufacture (CAD-CAM) zirconia crowns,and to compare Procera with Everest CAD-CAM system by observing clinical effects of the crowns.Methods Forty CAD-CAM zirconia crowns (10 crowns by Procera,and 30 crowns by Everest) were evaluated,and the examination criteria included:marginal fit,aesthetics,gingival health,retention,and fracture.All of the zirconia copings were produced using double scanning.Procera system and Everest system use contact scanner and optical scanner respectively. Results The observation time for the crowns ranged from 6 to 24 months.The resulm of clinic evaluation were acceptable in all restorations.Conclusions Double scanning could be used to produce complicated zirconia copings by CAD-CAM in order to get proper symmetrical porcelain length.It Wag easier to make complicated coping with contact scanuer than with optical scanner.

Neurological impairment in the form of stroke,cognitive dysfunction and delirium is a common complication after cardiac surgery and a major cause of postoperative death and long-term disability in patients undergoing cardiac surgery.There have been many studies attempting to identify intervention and treatment strategies,but no standardized protocols for neurological protection have been developed.The purpose of this article is to discuss the risk factors,mechanisms and neuroprotective measures to improve patient prognosis of neurological injury after cardiac surgery,and to review the recent research progress from three aspects:preoperative assessment and intervention,intraoperative management and monitoring,and postoperative diagnosis and treatment,emphasizing that the focus of perioperative prevention and treatment should be on the prevention of ischemic-hypoxic injury.Future research directions should focus on translational research of preclinical experiments and the development of novel imaging techniques to reduce the incidence of neurological complications and improve clinical outcome.

In order to study the proliferation inhibition effect of H5N1 subtype avian influenza virus (AIV) with small interfere RNA (siRNA), a total of 4 siRNAs were designed in accordance with the NP and PA genes of H5N1 subtype AIV, the siRNAs were then transfected to chicken embryo fibroblast(CEF), CEF was infected with H5N1 subtype AIV after 6 hrs. Virus titer of cell supernatant was tested at 16-56hrs post infection, and pathological changes of the cells was observed; mRNA levels of NP, PA, HA and p13-actin gene were tested at 36hrs post infection. The results showed that these 4 siRNAs could inhibit the prolif-eration of H5N1 subtype AIV in CEF in varying degrees, and one siRNA targeting PA was best per-formed. The experimental results also showed that the inhibition effect was decreased with the time prolonged. This research provides a basis for further studying RNAi on AIV prevention and control.
Actins ; genetics ; Animals ; Chick Embryo ; DNA Primers ; genetics ; Fibroblasts ; virology ; Hemagglutination ; Hemagglutinin Glycoproteins, Influenza Virus ; genetics ; Hemagglutinins ; genetics ; Humans ; Influenza A Virus, H5N1 Subtype ; genetics ; growth & development ; physiology ; RNA Interference ; RNA Replicase ; genetics ; RNA, Small Interfering ; chemical synthesis ; genetics ; RNA-Binding Proteins ; genetics ; Real-Time Polymerase Chain Reaction ; Specific Pathogen-Free Organisms ; Transfection ; Viral Core Proteins ; genetics ; Viral Proteins ; genetics ; Virus Replication