OBJECTIVE: To select the optimum extracting procedure for Kangdu Mixture by the application of L9 (34). METHODS: Orthogonal design was used to observe and study the effects of the factors of water volume, extracting times and extracting time on kangdu Mixture, the chlorogenic Acid and yield of dry extract was determined by high performance liquid chromatography, the synthetic weighted mark method was used to evaluate the extraction process. RESULTS: The optimum water extraction is as follows; 10 times of water, extracting twice by relux, 2 hours for each time. CONCLUSION: The process choosed in this experiment is practicable and can be applied for preparation of Kangdu Mixture, the optimal process is simple and high precision.

Chromatography, Gas ; methods ; Chromatography, High Pressure Liquid ; methods ; Humans ; Hypnotics and Sedatives ; blood ; Pentobarbital ; blood ; Pharmaceutical Preparations ; blood ; Sensitivity and Specificity

Objective: To study the main pharmacodynamics of Zengguang Tablets. Methods: Mice were given Zengguang Tablets orally in dosages of 0.75g/kg and 1.50 g/kg. The celiac macrophage phagocytic function and antibody formation of serum hemolysin (IgM) of mice were determined. The mouse blood vacuity model was established by injecting cyclophosphamide intraperitoneally in the dosage of 80mg/kg. Results: Zengguang Tablets could raise the celiac macrophage phagocytic function of mice and promote the antibody formation of serum hemolysin. Conclusion: Zengguang Tablets has the enhancement on organism immune function.

OBJECTIVETo investigate the effect of compound Coptidis Rhizoma capsule (CCRC) on unbalanced expression of renal tissue TGF-β1/BMP-7 and Smad signaling pathway in rats with early diabetic nephropathy (DN), and discuss CCRC's effect on DN rats with early diabetic nephropathy and its possible mechanism.

METHODDN model rats were established by injecting streptozotocin (STZ). The rats were randomly divided into seven groups: the normal group, the model group, the enalapril treatment group, the xiaoke pill treatment group and three CRCC treatment groups. They were orally administered once a day for five weeks. The fasting blood glucose (FBG), blood urea nitrogen (BUN), serum creatinine (Scr), insulin (Ins), 24 h urinary protein (24 h Upro) and 24 h urinary microalbumin (24 h UmAlb) were tested. The pathological changes in renal tissues were examined by optical microscopy. Immuno- histochemical measures were used to detect the expressions of TGF-β1, BMP-7, Smad2/3, Smad1/5, and Smad7 protein, and RT-PCR was used to detect TGF-β1 mRNA and BMP-7 mRNA in renal tissues.

RESULTCompared with model group, BUN, Scr, Ins, 24 h Upro and 24 h UmAlb levels decreased at different degrees in CCRC treatment groups; the abnormal pathomorphology in renal tissue was improved; immunohistochemistry results showed that the expression of TGF-β1 and Smad2/3 were reduced, while the expression of BMP-7, Smad1/5 and Smad7 increased in CRCC treatment groups; the expression of TGF-β1 mRNA were reduced, but the expression of BMP-7 mRNA had no obvious change in CRCC treatment groups.

CONCLUSIONCRCC can improve the early renal function, delay the progression of chronic renal pathology and maintain the dynamic balance of TGF-β1/BMP-7 expression in renal tissues of DN rats. The mechanism may be related to down-regulation of renal TGF-β1 and up-regulation of BMP-7 through Smad signaling pathway.

Animals ; Bone Morphogenetic Protein 7 ; genetics ; metabolism ; Coptis ; chemistry ; Diabetic Nephropathies ; drug therapy ; genetics ; metabolism ; Gene Expression Regulation ; drug effects ; Humans ; Kidney ; drug effects ; metabolism ; Male ; Rats ; Rats, Sprague-Dawley ; Rhizome ; chemistry ; Signal Transduction ; drug effects ; Smad Proteins ; genetics ; metabolism ; Transforming Growth Factor beta1 ; metabolism

To obtain a number of extracellular penicillinase,the gene(penp)encoding penicillinse of Bacillus cereus ATCC10987 was cloned into expression vector in Bacillus subtilis,transformed into Bacillus subtilis DB104 deficient in two proteases.When recombinant bacteria was cultured in LB medium for 24 hours,the result of SDS-PAGE showed that the molecular weight of the protein was 28kDa and the penicillinase activity reached 339U/ml.By screening seven different fermentation media,the result showed that 4# medium is favorable to producing penicillinase by the recombinant cells than the others,with the yield of the enzyme being 1580U/ml.When the recombinant cells was cultured in 7 liter fermentor for 24h,the penicillinase activity reached 1255.8U/ml.

To obtain a number of penicillinases and degrade penicillin in milk by using the penicillinases,the gene encoding penicillinase was amplified by PCR from Bacillus cereus ATCC10987,cloned into pET28a(+) ,transformed into E. coli BL21;analysis of SDS-PAGE and penicillinase activity of the recombinant protein were done under induction of IPTG and the result showed that the maximum penicillinase activity reached 480 U/mL;the purity of penicillinase purified by Ni2+ Purification System was more than 90%;the immobilized penicillinases were obtained by sodium periodate method and the residual quantity of penicillin in milk(containing 0.5 U penicillin G/mL) was less than 4 ppb after degraded by the immobilized penicillinase.

Renal transplant (RT) recipients have a high risk of developing cardiovascular diseases.However,the effects of renal transplantation on the development of arteriosclerosis have been controversial.The carotid intima-media thickness (CIMT) and diameter (CD) are important indicators of vascular remodeling and arteriosclerosis.In this study,31 patients with hemodialysis (HD),31 RT recipients and 84 age-and gender-matched control subjects were enrolled.Their CIMT and CD were measured by ultrasonic radiofrequency tracking,and the linear regression models and Z test were used to identify the progression of arteriosclerosis and the risk factors.Compared with HD group,RT group had significantly lower CIMT and CD.CIMT was found to be associated with age,body weight,resistance index and diastolic velocity,while CD was associated significantly with age,body weight,pulsatility index,end diastolic velocity and diastolic blood pressure (DBP),respectively.The correlation curves between CIMT and age showed the slopes of curves were decreased successively in control,RT and HD groups,and the curves between CD and age showed the slopes were decreased in order of RT ＞ control ＞ HD groups.It was concluded that CIMT and CD were significantly correlated with age in RT and moderately with age in HD patients.RT could reduce the progress of arteriosclerosis in patients with end-stage renal disease.

OBJECTIVE: To observe the effects of intermedin preconditioning on hypoxic injury in rat's cardiac myocytes and to provide the hypothetical mechanism of sudden cardiac death in the field of forensic pathology. METHODS: The H9c2 cultured rat cardiac myocytes were randomly divided into control group, hypoxia group and IMD group. The myocardial cell viability, cellular ultrastructure, intracellular calcium concentration and apoptosis rate were determined by MTT assay, transmission electron microscopy, laser scanning confocal microscope and flow cytometry, respectively. RESULTS: Compared with the control group, cell viability obviously decreased with inner ultrastructure injury in the hypoxia group (P<0.05), while cell viability significantly increased in the IMD group by reducing the hypoxia injury of cardiac myocytes (P<0.05). Compared with the control group, [Ca2+]i (fluorescence intensity) and apoptosis rate significantly increased in the hypoxia group, but decreased in the IMD group (P<0.05). CONCLUSION IMD increases the cell survival rate and decreases the cell apoptosis inhibited by intracellular calcium overload from hypoxia. This finding may reveal the mechanism of protective effects of myocardial hypoxia, and provide a scientific basis for the identification sudden cardiac death.
Animals ; Apoptosis ; Calcium ; Cell Hypoxia ; Cell Survival ; Hypoxia ; Myocardial Ischemia ; Myocardium/cytology* ; Myocytes, Cardiac/physiology* ; Rats ; Rats, Sprague-Dawley

OBJECTIVE: To investigate the relation between injury time and the expression of cytochrome c oxidase subunit VIc (COX6C) mRNA in skeletal muscle of rat after contusion. METHODS: A total of fifty-four SD rats were divided into the control group and the contusion groups (0.5, 1, 6, 12, 18, 24, 30, and 36 h after contusion), randomly. The contusion model was established by free fall drop of gravity hammer. At corresponding time point after contusion, the regular histology was examined and expression level of COX6C mRNA was tested by real-time PCR after extraction of total RNA from the tissues. RESULTS: The main pathological features of 6 h after injury included edema and hemorrhage in myocytes with no inflammatory cells found. After 6 hours, the findings included myocyte degeneration and necrosis, inflammatory cells infiltration, and fibrous connective tissue proliferation in the contused zone. The expression level of COX6C mRNA was higher than that of the control group within 6 h after contusion. The expression level was lower than that of the control group from 6-36 h after contusion. CONCLUSION The level of COX6C mRNA expresses in a regular way after contusion. It may be useful for estimating wound age in combination with the results of pathological features.
Animals ; Contusions/metabolism* ; Electron Transport Complex IV/metabolism* ; Muscle, Skeletal/metabolism* ; RNA ; RNA, Messenger ; Rats ; Rats, Sprague-Dawley ; Real-Time Polymerase Chain Reaction ; Time Factors

Objective To evaluate the risk of plague occurrence via surveying and analyzing indoor rat density and flea index in natural villages having previous plague experience. Methods During August to September 2007, 30 natural villages experiencing previous plague were selected based on the surveillance data, and then all households were coded with numbers and 20 households in each village were randomly selected via computer. Cages and sticky papers were set in 600 selected households to capture rats and fleas. Rat density, flea prevalence, flea index and median were estimated. Results One hundred thirty-three Rattus flavipectus and 33 Suncus murinus were caught and averaged rat density was 2.8 rats per one hundred cage. nights (166/6000), the median was 5 rats each village. One hundred and one mice infected fleas, flea prevalence on rats was 60.8% (101/166), 296 Xenopsylla cheopis and 48 Leptopsylla segnis were collected. Rat flea index was 2.1 fleas per rat (344/166). A total of 315 dissociated flea was caught, average dissociated flea index was 0.026 fleas per sticky paper (315/11888). The median was 5.5 dissociated fleas per village. Of dissociated fleas, Ctenocephalides felis felis (205) and Xenopsylla cheopis (103) accounted for 97.8% (308/315). The proportion for species of the rat flea and the dissociated flea was different(Fisher test: P < 0.01). The rat flea was significantly associated with the rat density(r = 0.68, P < 0.01), but the dissociated flea was significantly associated with neither the rat density(r = -yield than fried wheat batter(χ2 = 5.59, P < 0.05). Conclusions In these villages having previous plague experience of Lianghe County, Rattusflavipectus was dominant species of indoor rats, Xenopsylla cheopis and Ctenocephalides felis felis were dominant species of rat flea and dissociated flea, respectively. Mengsong, Bangdu, and Tangjiatun village had potential risk of plague emergence.