Corynebacterium glutamicum SA001 is a mutant with lactate dehydrogenase (ldhA) deletion. In order to increase metabolic flux from isocitrate to succinate, and to improve the production of succinate under anaerobic conditions,we transducted the gene aceA coding isocitrate lyase (ICL) from Escherichia coli K12 into Corynebacterium glutamicum SA001 (SA001/pXMJ19-aceA). After 12 h aerobic induction by adding 0.8 mmol/L of IPTG, the recombinant strain was transferred to anaerobic fermentation for 16 h. Succinate reached 14.84 g/L, with a productivity of 0.83 g/(L x h). Compared to C. glutamicum SA001, the activity of ICL of the recombinant strain was increased 5.8-fold, and the succinate productivity was increased 48%. Overexpression of isocitrate lyase will increase the metabolic flux of glyoxylate bypass flowing to succinate.
Corynebacterium glutamicum ; genetics ; metabolism ; Escherichia coli ; enzymology ; genetics ; Gene Deletion ; Industrial Microbiology ; Isocitrate Lyase ; biosynthesis ; genetics ; L-Lactate Dehydrogenase ; genetics ; Succinic Acid ; metabolism ; Transduction, Genetic

Humans ; Occupational Exposure ; Risk Assessment ; Workplace

Adult ; Ergonomics ; Female ; Humans ; Male ; Middle Aged ; Multivariate Analysis ; Musculoskeletal Physiological Phenomena ; Regression Analysis ; Workplace

Objective To evaluate the causes,prevention and treatment ot laparoscopic comphca- tions in urologic surgery.Methods From May 2000 to May 2004,135 urologic laparoscopies were per- formed,including 17 transperitoneal laparoscopies and 118 retroperitoneal laparoscopies.Of the135 cases,26 had adrenal adenoma extirpation;31 had roof-removal and decompression of renal cyst;25 had radical ne- phrectomy;6 had pyeloplasty;2 had partial resection of renal capsula and encapsulation of the great omen- tum;2 had partial nephrectomy;4 had pelviureteral resection;13 had ligation of renal pedicle lymphatic ves- sel;2 had ureterolysis;7 had ureterolithotomy;12 had ligation of spermophlebectasis;5 had exploration,re- duction and fixation of undescended testis.The intra-and post-operative complications were retrospectively reviewed and clinically analyzed.Results Overall,14 cases(10.4%)had complications.Intraoperative complications occurred in 10 cases,including 6 cases of peritoneal injuries,which were clamped during oper- ation;4 of vascular injuries,which resulted in conversion to open surgery.Postoperative complications oc- curred in 4 cases,including 2 of subcutaneous emphysema,which was spontaneously absorbed at 5 and 7 d after operation;1 of incision seepage,which was drained for 40 d and then disappeared;and 1 of urine reten- tion,for which urethral catheterization was kept for 3 d and then the patient had voluntary voiding.No death occurred in this series.Conclusions Understanding the characteristics of laparoscopic complications in u- rologic surgery and systematic training of the surgeons can reduce the occurrence of complications.

To assess whether the Shuxuening injection influences liver function, this paper analyzes the hospital information system (HIS) data from 20 national hospitals. The patients were divided two groups: patients (5 353 cases) using Shuxuening injection acted as the exposed group, then the patients (4 863 cases) not using Shuxuening injection acted as the unexposed group. Take the abnormal changes of alanine aminotransferase and aspartate aminotransferase indexes as the result. Control confounding factors by stratification analysis, classic logistic regression analysis, before logistic regression based on propensity score weighting method and logistic regression based on generalized boosted models (GBM) of propensity score weighted combination of covariate adjustment. Then, the study analyzes the effects of Shuxuening injection on liver function by observing the changes of the indexes. Analysis of the impact of parenterally administered Shuxuening on ALT shows that, before logistic regression based on propensity score, then the regression is -0.232 (P value is 0.017). However, after logistic regression based on propensity score method the regression became -0.150 (P value is 0.370). Whereas, analysis of the impact of parenterally administered Shuxuening on AST shows that, before logistic regression based on propensity score, then the regression is -0.034 (P value is 0.767). However, after logistic regression based on propensity score method the regression became -0.091(P value is 0.538). Thus, propensity score method can control a large number of confounding factors, making the results more close to the clinic. Hence, based on existing electronic medical data, this study didn't find that parenterally administered Shuexuening influences ALT and AST.
Adolescent ; Adult ; Aged ; Aged, 80 and over ; Drugs, Chinese Herbal ; administration & dosage ; adverse effects ; Electronic Health Records ; Female ; Humans ; Injections ; Liver ; drug effects ; metabolism ; Logistic Models ; Male ; Middle Aged ; Young Adult

Health Personnel ; psychology ; Humans ; Logistic Models ; Multivariate Analysis ; Professional Competence ; statistics & numerical data ; Stress, Psychological ; epidemiology

AIM: To determine the association between subfoveal choroidal thickness before therapy and therapeutic activity in diabetic macular edema.
METHODS: The current study was a retrospective study, which included 32 patients ( 32 eyes ) diagnosed with diabetic retinopathy and macular edema. All the patients were firstly treated with intravitreal injections of ranibizumab. Main outcome measures were included the subfoveal choroidal thickness, central macular thickness and best-corrected visual acuity ( BCVA) at preoperation and postoperative visit at 3mo.
RESULTS: After 3 monthly intravitreal injections of ranibizumab, the BCVA was significantly higher than that before therapy and accompanied with significantly reduced thickness of subfoveal choroid and central fovea of macula. Spearman analysis was revealed that a greater baseline subfoveal choroidal thickness was associated with a better BCVA (rs=0. 544, P=0. 036).
CONCLUSION:In the therapy of intravitreal injections of ranibizumab on diabetic macular edema, there seems to be a better BCVA in the patients with a greater baseline subfoveal choroidal thickness. Therefore, baseline subfoveal choroidal thickness may be a useful predictor for the therapy of diabetic macular edema.

In this study, a rapid and sensitive analytical method was developed for the determination of 10 major compounds (procyanidin B1, catechin, procyanidin B2, rutin, isoquercitrin, kaempferol-3-O-rutinoside, astragalin, quercitrin, quercetin, and kaempferol) in Tetrastigma hemsleyanum by using ultra-performance liquid chromatography coupled with triple-quadrupole tandem mass spectrometry (UPLC-MS/MS) in multiple-reaction monitoring (MRM) mode. UPLC-MS/MS assay with negative ion mode was performed on a Waters CORTECS C18 (2.1 mm x 100 mm, 1.6 μm) with the mobile phase consisting of acetonitrile (A) and 0.1% aqueous formic acid (B) in gradient elution at a flow rate of 0.25 mL · min(-1) and the column temperature was set at 45 °C. Under the optimized chromatographic conditions, good separation for 10 target compounds were obtained including chiral isomer procyanidins B1 and B2 were completely separated within 8.5 min. Satisfactory linearity was achieved with wide linear range and fine determination coefficient (r > 0.996 6), the overall recoveries were ranged from 95.44%-110.40% with the RSD ranging from 2.37%-8.69%. It is the first report about simultaneous analysis of 10 major flavonoids components in Tetrastigma hemsleyanum by using UPLC-MS/MS method, which affords highly sensitive, specific, speedy and efficient method for quality control of Tetrastigma hemsleyanum
Acetonitriles ; Chromatography, High Pressure Liquid ; Flavonoids ; chemistry ; Kaempferols ; Quercetin ; analogs & derivatives ; Rutin ; Tandem Mass Spectrometry ; Vitaceae ; chemistry

Acute Disease ; Bacteria ; isolation & purification ; Child, Preschool ; Haemophilus influenzae ; isolation & purification ; Humans ; Infant ; Infant, Newborn ; Nasopharynx ; microbiology ; Respiratory Tract Infections ; diagnosis ; microbiology ; Streptococcus pneumoniae ; isolation & purification ; Trachea ; microbiology

The Qinbai Qingfei concentrated pellets by traditional Chinese medicine theoryand party and group, the rats were given the drugs group, comparison of pharmacokinetics parameters changes of baicalin , discusses the rationality of Qinbai prescription. The rats were gavaged monarch drug group (Huang Qincu extract, mainly forbaicalin), and official medicine group, adjuvant group, medicine group and Qinbai group (Quan Fangzu) the content of baicalin equal as the monarch drug group, in the 28 h collection in rat plasma at different time point, application of HPLC determination of baicalin glycosides in rat plasmaconcentration time curve, with 3P97 practical pharmacokinetics program to process the data Based on the data analysis, baicalin in rat plasma of Qinbai group Cmax is 4 times as big as monarch druggroup, AUC is 6 times as big as monarch drug group; the content of baicalin in plasma of rats the highest is Qinbai group, the minister drug group, adjuvant group, medicine group of baicalin in rat plasma content of less than the Qinbai group, but was significantly higher than that of monarch drug group; the medicine group is slightly higher than that adjuvant the content of baicalin in plasma of rats. The pharmacokinetic results show that the measured plasma concentration in rats that Qinbai can significantly increase Cmax and AUC of baicalin, other components of qinbai can promoted the baicalin absorption in vivo. It showed that the reasonable of Qinbai compound compatibility. The minister drug can promote the absorption of baicalin in vivo.
Animals ; Area Under Curve ; Drugs, Chinese Herbal ; analysis ; pharmacokinetics ; Flavonoids ; blood ; pharmacokinetics ; Intestinal Absorption ; Male ; Rats ; Rats, Wistar