OBJECTIVE:To optimize ultrasonic extraction technology for polysaccharide from Aconiti lateralis radix praepara-ta(ALRP). METHODS:Uniform design method was applied to investigate the effects of liquid material ratio,ultrasonic time and ultrasonic temperature on extraction rate of polysaccharide from ALRP. Verification test was conducted and compared with the re-sults of conventional decoction and boiling method. RESULTS:Optimized ultrasonic extraction technology was as follow as liquid material ratio of 10 mL/g,ultrasonic time of 34 min and ultrasonic temperature of 73 ℃. The polysaccharide extraction rate in veri-fication test was 19.05%(RSD=0.60%,n=3),relative error of the predicted value (19.44%) was 2.0%,while the extraction rate was higher than decoction and boiling method(16.42%). CONCLUSIONS:Optimized ultrasonic extraction technology is sim-ple,rapid and stable with high extraction rate,which is suitable for extracting polysaccharide from ALRP.

Automatic Data Processing ; Humans ; Medicine, Chinese Traditional ; Pulse

Objective:To investigate the distribution of abnormal eating behaviors among middle school girls in Beijing and the psychological factors having influence on these behaviors Methods: HDI and ESC-21 were used to investigate 636 female middle school students in Beijing Results: (1) According to the BMI of the subjects, 80 3% of the subjects answered that they had paid attention to their weight and stature (2) The mean BMI of the subjects were 19 38, which is in the normal range, but their ideal body mass index(IBMI)was lower than the normal standard (IBIM

Apoptosis ; Breast Neoplasms ; metabolism ; pathology ; Female ; Humans ; MicroRNAs ; metabolism ; physiology ; Receptor, ErbB-2 ; metabolism ; Receptors, Androgen ; metabolism ; Receptors, Estrogen ; metabolism ; Receptors, Progesterone ; metabolism ; Signal Transduction

Objective To evaluate the utility of carbapenem inactivation method (CIM) in detecting carbapenemase-producing Acinetobacter baumannii.Methods A total of 121 strains of A. baumannii were identified and subjected to antimicrobial susceptibility testing by VITEK compact. Carbapenem inactivation method (CIM) was applied to detect the carbapenemase in the A. baumannii strains. The OXA-23 type carbapenemase-encoding genes were analyzed by common PCR method.Results Six-eight of the 121 strains showed resistance to imipenem and meropenem. PCR showed that 65 of the 68 strains carried OXA-23 gene. CIM was positive in 66 of the 68 strains. And 52 of the 121A. baumannii strains were susceptible to imipenem and meropenem. PCR showed that OXA-23 gene was negative in 49 of the 52 strains. CIM was negative in the 52 strains of non-carbapenemase-producing A. baumannii. Only one strain was resistant to imipenem but susceptible to meropenem. CIM was negative but QXA-23 was positive for this strain. The sensitivity and the specificity of CIM was 94.2% and 98.1% respectively in detecting carbapenemase-producing A. baumannii.Conclusions The results of CIM were consistent with the results obtained by PCR to detect the encoding gene of OXA-23. CIM is inexpensive, easier to operate and interpret than PCR method. CIM is applicable to detect OXA-23 type carbapenemase rapidly inA. baumannii.

We have carried out experiment design and comment,and students write the reports of experiment design in patho- physilolgy teaching from the aspects of basic process of experiment research and basic factors,principle and meaning of experi- ment design.By way of the teaching reform,the major position of students in studying is established,students' ability to study in- dependently and acquire knowledge actively are well cultivated,their comprehensive quality are enhanced and the teachers con- struction is also promoted.

Objective To study the offactory function test in Parkinson' s disease(PD), in order to promote the diagnosis of the PD. Methods Subjects included 95 middle-aged volunteers and 37 Pdpatients. A subjective olfactometry with T&T olfactometer was performed in all volunteers and patients.Olfactory event related potentials with isoamyl acetate were obtained in all volunteers and patients. Results The T&T olfactometer Results for the 2 sides were 4.6±1.1,4.4±1.2 in PD patients older than 70 years old and 3.9±1.7, 4.0±1.7 in those, respectively; while the data were 0.4±0.9,0.4±0.9 in volunteers older than 70 years, were 0.5±0.8,0.5±0.8 younger than 70 years old. There was a significant differencein T&T olfactometer Results between PD and volunteers (t=15.246,15.378,8.664,8.776, P<0.01). TheP2 latencies were respectively (734.9±143.2), (696.1±165.9) ms for the 2 sides in PD older than 70years, and (730.5±159.4), (719.5±159.2) ms in PD younger than 70 years;while they were (547.9±65.0), (558.5±56.3) ms, and (523.3±61.9), (526.8±62.0) ms in volunteers younger than 70 years.There was a significant difference in P2 latency between PD and volunteers (t = -3.940, -3.750,- 7. 514, - 8.205,P<0.01). Conclusions Olfactory dysfunction is an important index in PD. Olfactory function test is an useful method in the diagnosis of PD.

BACKGROUND: Recent research has shown that Gastrodia elata Bl (GEB) has a cardiovascular protective effect and relaxes blood vessels with important therapeutic implication to treat coronary heart disease and hypertension. However, the mechanism is still unclear.OBJESTIVE: To study the effect of the water decoction of GEB on noradrenaline (NA) or KC1 precontracted aortic rings and the possible mechanisms.DESIGN: A grouping observational experiment of animal tissue in vitro.SETTING: Department of Physiology, North Sichuan Medical College.MATERIALS: Twelve health New Zealand、White rabbits (2.5-3.0 kg, 7-8 months, SPF, either gender) were provided by the Experimental Animal Center, North Sichuan Medical College. The water decoction of GEB was prepared by Huirentang Drugstore and diluted into 10%, 20%, 40%and 80% solution. The following drugs were used: Nω-nitro-L-arginine (L-NNA, Sigma, USA); Methylene blue (MB, Merck, Germany); Acetylcholine (ACh) and Propranolol (Prop) (The Second Beijing Pharmaceutical Company, China); Indomethacin (Indo, Jingsu Taicang Pharmaceutical Company, China).METHODS: The experiment was performed in the Institute of Materia Medica, North Sichuan Medical College between January 2006 and January 2007. Rabbit smooth muscles of aortic rings were isolated and precontracted with NA. The thoracic aortic rings were treated with GEB with cumulative concentrations of 1.0,2.0,4.0,8.0 and 16g/L respectively. The aortic tings were treated with one of the following signaling inhibitors for 15 minutes, including 1×104mol/L L-NNA, 1×10-5mol/L MB, 1×10-5mol/L Indo and 1×10-5mol/L Prop. The changes of tension in aortic rings were recorded using a force transducer and processed by BL-410 Experimental System of Biological Function. The aortic rings were incubated with 8g/L GEB followed by the NA and KCl dose response experiments.MAIN OUTCOME MEASURES: Blood vessel tension ex vivo.RESULTS: GEB did not change the resting tension of rabbit aortic rings, but GEB treatment resulted in an obvious relaxation in NA-precontracted aortic rings (r=0.85, t=18.45, P＜0.01) and the relaxant effect was dose-dependent. The relaxant effect of GEB was significantly reduced by removal of endothelium and by treatment with 1×10-4mol/L nitric oxide synthase inhibitor L-NNA (1×10-4mol/L), or 1×10-5mol/L guanylyl cyclase inhibitor methylene blue (1×10-5mol/L MB), but not by treatment with prostaglandin synthase inhibitor of blockage of the adrenergic β-receptor (1×10-5mol/L Prop). In addition, GEB (8g/L) decreased the dose response curves of aortic rings to NA or KCl in the absence of endothelial cells, and changed the PD2 values for NA from (6.90±0.93)mol/L in control group to[(5.61±0.70)mol/L, t=2.41, P＜0.05] and for KCl from (1.53±0.55) mmol/L in control group to (1.10±0.25)mmol/L, t=3.82, P＜0.05] respectively.CONCLUSION: GEB can relax isolated rabbit aorta not only in an endothelium-dependent, nitric oxide involved manner, but also is related to blockage of receptor-operated and potential-dependent calcium channels.

BACKGROUND:Bone marrow mesenchymal stem cells(MSCs)are a kind of adult stem cells with multi-potential differentiation property.At present,it has served as cell carrier for the treatment of Parkinson's disease.OBJECTIVE:To construct pDsRed-C1-CDNF eukaryotic expression vector and induce its expression in rat MSCs.METHODS:CDNF gene was amplified from mouse tissues using RT-PCR,and sequence with Xho I,BamHI restriction enzyme cutting site.The CDNF gene was inserted into the eukaryotic expression vector pDsRed-C1 encoding red fluorescent protein gene.The plasmid pDsRed-C1-CDNF was constructed and transfected into rat bone marrow MSCs.RESULES AND CONCLUSION:The pDsRed-C1-CDNF recombinant plasmid was confirmed by double digestion of Xho I and BamHI restriction enzyme or single digestion of BamHI,and PCR sequence.Results show that the recombinant pDsRed-C1-CDNF eukaryotic expression vector was successfully constructed.

Objective To evaluate the significance of homocysteine(HCY)and color Doppler flow imaging(CDFI)in the diagnosis and treatment of the renal damage in hypertension.Methods Seventy-two patients were divided into 3 groups according to the indicators of renal damage of hypertension.HCY in blood and the parameters of three grades renal artery with CDFI were measured and compared with 20 controls.Besides these，the relationship between HCY and resistant index(RI)of interlobar renal artery (IRA)was also analysed.Results①The level of HCY in hypertension was much more higher than the level in controls.HCY increased with the damage of renal function，and there were significant differences between different groups(P＜0.05).②The Vmax and Vmin were slower gradually，but PI and RI were higher with the severity of the renal damage(P＜0.01).③HCY were positive correlation with IRNs RI(r=0，35，P＜0.0 1).Conclusions The changes of CDFI can reflect the conditions of renal blood flow，it is possible to know renal blood flow by measuring RI of IRA.The level of HCY will increase gradually with the degression of renal function，it iS useful to evaluate the renal damage.The measurement of CDFI for hypertensive patients is valuable not only for the evaluations of their renal function but also for the severity of hyperhomocysteinemal and their therapy condition.