The basic pain threshold and pain tolerance were measured by use of radiant heat stimulation in healthy volunteers, which were close to normal distribution. The stability was obtained by repeated determination for same individuals in different time. With this method, a clinical assessment of analgesic drugs was carried out among healthy volunteers. Acetaminophen-Codeine tablet ( 2 tablets ) was able to depress pain response by increasing pain threshold and tolerance of 23% and 12% ( P

Buprenorphine, a synthetic derivative of Thebaine, is a strong new analgesic agent. It was compared with pethidine in doudle-blind trial of 86 burn and plastic patients with severe or moderate pain. The result showed that the analgesic effect of Buprenorphine 0.3 mg I. M. appeared superior to Pethidine 50mg ( P

Animals ; Apoptosis ; drug effects ; Aurovertins ; toxicity ; Cells, Cultured ; DNA Damage ; drug effects ; Female ; Male ; Myocytes, Cardiac ; drug effects ; Rats ; Rats, Wistar

BACKGROUND: Researches are recently focus on topography and image dissection of nasolacrimal duct, but it is lack of systemically contrast researches between sectional anatomy and image anatomy on bone nasolacrimal duct by using dry cranium samples.OBJ ECTIVE: To investigate the characteristics of sectional anatomy and image anatomy on bone nasolacrimal duct and provide evidences for related operations of nasolacrimal duct.DESrGN: Self controlled study.SETTING: Office of Teaching Supplies, Chengdu Medical College.MATERIALS: The experiment was carried out in the Topography Laboratory, Department of Human Anatomy, Chengdu Medical College from September 2005 to September 2006. Non-injured dry cranium was randomly selected from 34 adults (68 sides), including 34 sides on males and 34 sides on females.METHODS: ① Based on OM line, a routine scanning base line, which was regarded as the axial scanning baseline,samples were scanned at flat level with SHIMADZU CT device. Bone nasolacrimal duct was factitiously divided into three parts, including 1/3 superior segment, 1/3 middle segment and 1/3 inferior segment. The means at each related layer were determined as the final results. ② Cranium samples were signed based on image scanning baseline, and then they were cut into sections at cross section fault along scanning baseline at flat level with section razor. In addition, related indexes of bone nasolacrimal duct were measured and compared with image results.MAIN OUTCOME MEASURES: ① Anterior, posterior, left and right diameters of superior aperture, 1/3 superior segment,1/3 middle segment, 1/3 inferior segment and inferior aperture of bone nasolacrimal duct; ② depth of internal bone wall and posterior bone wall in superior aperture, 1/3 superior segment, 1/3 middle segment, 1/3 inferior segment and inferior aperture if bone nasolacrimal duct; ③ position and form of inferior aperture of bone nasolacrimal duct; ④ comparisons of bone nasolacrimal duct between image anatomy and sectional anatomy.RESULTS: ① Anterior, posterior, left and right diameters of cross section of bone nasolacrimal duct: Superior aperture of bone nasolacrimal duct was narrow, but inferior aperture was changed obviously. Diameter was increased from top to bottom. In addition, anterior and posterior diameters were more than left and right ones. There was significant difference in internal diameter of superior aperture and 1/3 inferior segment of bone nasolacrimal duct between male and females (t =2.458, 2.227, P ＜ 0.05). However, there was no significant difference in internal diameter of 1/3 superior segment, 1/3 middle segment and inferior aperture of bone nasolacrimal duct between male and female (P ＞ 0.05). ② Depth of internal bone wall and posterior bone wall of bone nasolacrimal duct at cross section: Depths of internal bone wall and posterior bone wall of bone nasolacrimal duct were (0.87±0.23) mm and (0.21±0.19) mm, respectively. In addition, there was significant difference between them (t =2.547, P ＜ 0.05). However, there was no significant difference in depth of internal bone wall and related posterior bone wall of superior aperture, 1/3 superior segment, 1/3 middle segment, 1/3 inferior segment and inferior aperture of bone nasolacrimal duct between male and female (P ＞ 0.05). ③ Position and form of inferior aperture of bone nasolacrimal duct changed remarkably. Results of image anatomy of bone nasolacrimal duct were as the same as those of sectional anatomy.CONCLUSION: Perfection of normal sectional anatomy and image anatomy of bone nasolacrimal duct is beneficial for successfully performing related operations of nasolacrimal duct and reducing complications.

Objective To explore the apoptosis effect of docetaxel combined gamma knife on hepatoma cell SMMC-7721 subcutaneous xenograft in nude mice.Methods Subcutaneous xenogyaft models were constructed and were divided into two groups:control group and experimental group.The experimental group was treated with docetaxel 60ug/0.3ml once every 3 days for 6 times and gamma irradiation once every other day for 6 times (with indoor temperature of 137Cs radiation source irradiating the tumor and of fractionated schedule 5Gy with the total dose of 10Gy every time).The control group was treated with physiological saline with the same dose of 60 ug/0.3 mL.Tumor growth was observed.Tumor samples were cut 30 days after the treatment and TUNEL was used to detect the apoptosis of tumor cells.Results Tumor growth rate in experimental group significantly slowed down.Apoptotic index in experimental groups was significantly higher than that in control group (P ＜ 0.05) Cornclusion Docetaxel combined gamma knife can inhibit the growth of hepatocellular carcinoma in nude mice.

OBJECTIVEIn this study, five heavy metals contamination of soil and different parts of Panax notoginseng in the plantation area was investigated. Analysis of heavy metals correlation between the planting soil and P. notoginseng; and the absorption and accumulation characteristics and translocation of soil heavy metals by P. notoginseng plants was revealed.

METHODThrough field investigation and laboratory analytical methods, analysis of China's 30 different soil P. notoginseng origin and content of heavy metals in five different parts of the P. notoginseng plant content of heavy metals.

RESULTThe results revealed that the soil heavy metals should not be neglected in the plantation area Referring to the national soil quality standards (GB15608-1995), the excessive degree of soil heavy metals pollution showed Hg > As > Cd > Cr in the plantation area, and Pb content of soil was in the scope of the standard. Refer to 'Green Industry Standards for Import and Export of Medical Plants and Preparations', the excessive degree of heavy metals content of P. notoginseng plants showed As > Pb > Cr > Cd, and Hg content of plants was in the scope of the standard. Concentrations of five heavy metals of underground parts of P. notoginseng plants are higher than aboveground, and heavy metals elements are more concentrated in the root, followed by the rhizome of P. notoginseng plants. Heavy metal accumulation characteristics of the different parts of the P. notoginseng of the overall performance is the root > the rhizome > the root tuber > leaves > stems. From the point of view BCF value analysis of various parts of the P. notoginseng plants to absorb heavy metals in soil, BCF values of all samples were less than 1, description P. notoginseng not belong Hyperaccumulator. From the view of transportation and related analysis of the soil-P. notoginseng systems, the rhizome of P. notoginseng and the content of As and Cr in soil was significantly correlated, the root of P. notoginseng and the content of Cd in soil was significantly correlated, and no significant correlation between the other indicators. Through the analysis of transportation transfer coefficient showed: Pb, As and Cr are not easy to transport aboveground part from the underground, but Cd and Hg are relatively easy to transport stems from rhizome, the migration of five heavy metals in the aerial part is relatively strong, and heavy metal of stems is easily transported to the leaves.

CONCLUSIONP. notoginseng does not belong to the enrichment of heavy metals in crops, especially for Hg in soil with strong patience. In survey area, the content of heavy metals of P. notoginseng's planting soil is relatively high, and the heavy metals As, Pb, Cr, Cd of P. notoginseng also exist heavy metals exceeded problems. Due to the presence of heavy metals in crops internal absorption and translocation of special laws, accumulation of heavy metals varied significantly in different parts of P. notoginseng. The overall, the performance for the heavy metal content of the underground parts is more than aboveground, it explain heavy metals of P. notoginseng plants is still the main source of the soiL Therefore, the key to control of planting area soil environmental quality and reduce exogenous harmful substances secondary pollution of soil in the cultivation process are to study and solve the heavy metals pollution problem of P. notoginseng.

Adsorption ; China ; Laboratories ; Metals, Heavy ; analysis ; Panax notoginseng ; chemistry ; Soil ; chemistry ; Soil Pollutants ; analysis

OBJECTIVETo study whether total saponins of Panax notoginseng (PNS) can prevent renal interstitial fibrosis occurrence through blocking the IL-1alpha induced tubular epithelial cell and decrease the secretion of extracellular matrix (ECM).

METHODSNormal rats' tubular epithelial cells NRK52E were cultured in vitro, their morphological changes were observed by inverted phase contrast microscope and scanning electron microscope. Flow cytometry technique and immuno-histochemical method was used to detect the expression of alpha-smooth muscle actin (alpha-SMA), and ELISA was used to quantitatively detect the fibronectin (FN) in the supernatant

RESULTSIL-1alpha could induce the transdifferentiation of tubular epithelial myofibroblast, showing hypertrophy of cells elongated and fusiform-shaped, with significantly enhanced expression of alpha-SMA and increased secretion of FN (P<0.05). After adding PNS of different concentrations, the morphology of cells restored close to normal tubular epithelial cells, with the increase of alpha-SMA expression and FN secretion significantly inhibited (P<0.05) in dose-dependent manner (P<0.05). But addition of different dosages of PNS alone showed no effect on tubular cells.

CONCLUSIONIL-1alpha could induce the transdifferentiation of tubular epithelial myofibroblast, promote the deposition of ECM component FN. PNS could inhibit IL-1alpha induced the transdifferentiation of NRK52E and secretion of ECM, therefore, PNS could be taken as a new drug for prevention and treatment of renal interstitial fibrosis and terminal stage of renal diseases.

Actins ; analysis ; Animals ; Cell Differentiation ; drug effects ; Cell Line ; Epithelial Cells ; cytology ; Fibronectins ; analysis ; Fibrosis ; prevention & control ; Interleukin-1 ; pharmacology ; Kidney ; pathology ; Kidney Tubules ; cytology ; Panax ; chemistry ; Rats ; Saponins ; isolation & purification ; pharmacology

Objective To investigate status of macrolide resistance and determine molecular mechanisms in Mycoplasma pneumoniae.Nethods All of 370 throat swab specimens were cultured to isolate Mycoplasma pneumoniae.Mycoplasma pneumoniae isolates were identified by nested PCR for specific 16SrRNA gene.Antibiotic susceptibility test was done to identify acrolide resistant strains.23SrRNA gene wag amplified by nested PCR followed by direct automatic sequencing method.The DNA sequences were compared to the sequence of Mycoplasma pneumoniae M129(accession no.X68422)to find molecular mechanisms of drug resistance.Results Fifty clinical strains were isolated from 370 specimens.Of 50 strains.4 strains were susceptible to macrulide,46 strains were macrolide resistant with the percentage of 92%.MICs of resistant strains to erythromycin.Azithromycin and josamycin were elevated.The sequence of 23SrRNA gene in 4 Susceptible strains and the reference strain FH was identical to Mycoplagma pneumoniae gene in GenBank.46 resistant strains arbored a point mutation respectively,among them,40 strains had all A to G transition at position 2063.1 strain had an A to C transition at position 2063,the other five strains showed an A to G transition at position 2064.Conclusions Macrolide resistance in Mycoplasma pneumoniae iS very serious health conceru.The point mutation in 23SrRNA.Xpecailly predominant position 2063 mutation contributed to the macrolide resistance in Mycoplagma pneumoniae.The MICs of resistant strains to erythromycin,azithromycin and iosamycin are much higher than Mycoplasma pneumoniae reference strain FH.

To synthesize aristolochic acid (AA)-2'-deoxyguanosine 5'-monophosphate (dGp) adducts in vitro and develop a novel method for the characterization of the adducts using multiple mass spectrometric techniques. AA was incubated with dGp in vitro using either enzymatic activation (by xanthine oxidase) or chemical activation (by zinc) to synthesize AA-dGp adducts, and the reaction conditions were optimized. Crude extracts were analyzed by techniques of liquid chromatography-electrospray ionization/tandem mass spectrometry (LC-MS/MS) and high accuracy mass data and isotope pattern of super high resolution Fourier transform-ion cyclotron resonance mass spectrometry (FT-ICRMS). The quasi-molecular ion peaks of the AA-dGp adducts were obtained in the negative ion mode. Analysis by electrospray ionization/tandem mass spectrometry (ESI-MS/MS) provided useful structural information about AA-dGp adducts. AA can bind covalently to the exocyclic amino group of deoxyguanosine to form AA-dGp adducts. MS analysis is a powerful tool to detect and identify AA-dGp adducts simply, rapidly and accurately.
Aristolochic Acids ; chemical synthesis ; chemistry ; Chromatography, High Pressure Liquid ; methods ; DNA ; chemistry ; metabolism ; DNA Adducts ; chemical synthesis ; Deoxyguanosine ; chemistry ; Tandem Mass Spectrometry ; methods

To establish a MacELISA method for the detection of IgM antibodies against Chikungunya virus (CHIKV), we prepared virus like particle (VLP) antigens of CHIKV using the whole structural protein C-E3-E2-6K-E1 encoding gene with a baculovirus expression system in Sf9 insect cells. The VLPs were purified and used to immunize Kunming mice. Then, polyclonal antibodies were purified from the samples of ascites with a protein G HiTrap SP column and labeled with horseradish peroxidase. A MacELISA method for the detection of IgM antibodies against CHIKV was assembled with goat anti-human IgM antibody, VLP antigens and an enzyme-labeled polyclonal antibody. The results were evaluated with a serum panel containing serum samples from laboratory-confirmed CHIK, HFRS patients, healthy donors, and commercially available CHIKV IgM as a quality control. It was shown that the MacELISA had a specificity of 99% (99/100), the coefficients of variation (CoV) within a plate were <10%, and the CoV of different ELISA plates in terms of the plate variation coefficient was <15%. A comparative analysis was performed to compare the current method against a commercial CHIKV IgM antibody detection kit for IIFA-IgM. The detection limit of MacELISA was significantly lower than that of the IIFA-IgM commercial kit (P< 0.0001). Here, we demonstrate that the VLP-based MacELISA is a promising tool for the early diagnosis and epidemiological investigation of CHIKV infection, with a high level of sensitivity and specificity for the detection of IgM antibodies against CHIKV.
Animals ; Antibodies, Viral ; blood ; Chikungunya Fever ; blood ; diagnosis ; virology ; Chikungunya virus ; immunology ; isolation & purification ; Enzyme-Linked Immunosorbent Assay ; methods ; Humans ; Immunoglobulin M ; blood ; Mice