Objective To investigate the infection prevention effect of prophylactic use of antibiotics for cancer inpatients with leukocyte count ≤ 1 × 109/L.Then to provide the basis for rational use of antibiotics.Methods It was retrospectively surveyed that the infection situation and prophylactic usage of antibiotics in the 426 cancer inpatients with leukocyte count ≤ 1 × 109/L caused by radiotherapy and chemotherapy.Results In the 426 inpatients,the infection rates of patients with and without prophylactic use of antibiotics were 11.0％ and 20.9％ respectively.The difference was statistically significant (x2 =6.815,P =0.009).The leukocyte count median values of patients with and without infection were 0.73 × 109/L and 0.77 × 109/L respectively.The difference had no statistical significance(Z =-1.257,P =0.209).The main infection sites were lower respiratory tract,upper respiratory tract and gastrointestinal tract with infection rates of 48％,12％ and 11％,respectively.The top five pathogens were Klebsiella pneumonia,Enterobacter cloacae,Escherichia coli,Enterobacter aerogenes and Staphylococcus aureus.The most use of antibiotics were cephalosporin.Conclusion When the leukocyte counts of cancer inpatients are less than or equal to 1 × 109/L induced by chemotherapy and radiotherapy,reasonable prophylactic use of antibiotics can reduce hospital infection rates.

The objective of this work was to investigate the effect of six individual strains of fungi on the reduction of gossypol levels and nutritional value during solid substrate fermentation of cottonseed meal (CSM). Six groups of disinfected CSM substrate were incubated for 48 h after inoculation with either of the fungi C. capsuligena ZD-1, C. tropicalis ZD-3, S. cerevisae ZD-5, A. terricola ZD-6, A. oryzae ZD-7, or A. niger ZD-8. One not inoculated group (substrate) was used as a control. Levels of initial and final free gossypol (FG), crude protein (CP), amino acids (AA) and in vitro digestibility were assayed. The experiment was done in triplicate. The experimental results indicated that microbial fermentation could greatly decrease (P<0.05) FG levels in CSM. The detoxification efficiency differed between the species of microorganisms applied. From the perspective of reducing CSM potential toxicity, C. tropicalis ZD-3 was most successful followed by S. cerevisae ZD-5 and A. niger ZD8. They could reduce FG levels of CSM to 29.8, 63.07 and 81.50 mg/kg based on DM (dry matter), respectively, and their detoxification rate were 94.57%, 88.51% and 85.16%, respectively. If crude protein, amino acids content and their in vitro digestibility were also taken into account, A. niger ZD-8 may be the best choice. The CP content of CSM substrate fermented by C. tropicalis ZD-3 and A. niger ZD-8 were improved by 10.76% and 22.24%; the TAA (total amino acids) contents were increased by 7.06% and 11.46%, and the EAA (essential amino acids) were raised by 7.77% and 12.64%, respectively. Especially, the levels of methionine, lysine and threonine were improved greatly (P<0.05). The in vitro CP digestibility of CSM fermented by C. tropicalis ZD-3 and A. niger ZD-8 was improved by 13.42% and 18.22%, the TAA were increased by 17.75% and 22.88%, and the EAA by 16.61% and 21.01%, respectively. In addition, the in vitro digestibility of methionine, lysine and threonine was also improved greatly (P<0.05).
Amino Acids ; analysis ; Cottonseed Oil ; chemistry ; metabolism ; Digestion ; Fermentation ; Fungi ; metabolism ; Gossypol ; analysis ; Nutritive Value ; Plant Proteins ; analysis

Child, Preschool ; Female ; Humans ; Sarcoma ; diagnosis ; surgery ; Stomach Neoplasms ; diagnosis ; surgery ; Stromal Cells ; pathology

This study aimed to explore the impact of depression caused by chronic unpredictable mild stress (CUMS) on in vivo activity of six kinds of CYP450 isoforms in rats. According to 'Katz' method, the model of CUMS was established. Tolbutamide, chlorzoxazone, theophylline, midazolam, omeprazole and dextromethorphan were chosen as probe substrates of CYP2C6, CYP2E1, CYP1A2, CYP3A2, CYP2D1 and CYP2D2 of rats. Plasma concentration of six kinds of CYP450 in control group and model group were determined by LC-MS/MS and computed pharmacokinetic parameters. Consequently, metabolism of theophylline and chlorzoxazone accelerated significantly (P < 0.01), but tolbutamide, dextromethorphan, omeprazole and midazolam had no significant difference. The present study proved that depression caused by CUMS had strong induction to CYP1A2 and medium induction to CYP2E1.

Aim To investigate the influence of sarpog-relate hydrochloride (SH)on the pharmacokinetic pro-file of dextromethorphan (DM),the typical substrate of CYP2D1 /2,in rats when they were administered co-instantaneously.Methods A total of 1 2 SD rats were randomly divided into two groups:the control group (DM,1 0 mg·kg-1 )and the sarpogrelate group (SH, 1 0 mg·kg-1 ;DM,1 0 mg·kg-1 ),which received in-tragastric administration.Plasma samples were collected immediately before and at different time points after drug administration.A LC-MS /MS method was used to determine the concentrations of DM in rat plasma. Pharmacokinetic parameters were analyzed using Drug and Statistics (DAS 2.0).Results There were signif-icant differences in the pharmacokinetic parameters of DM,including T1 2 (2.49 h ±0.93 h vs 1 .47 h ±0.20 h,P <0.05 ),Cmax (325.7 μg·L -1 ±1 33.2 μg· L -1 vs 1 04.5μg·L -1 ±52.4 μg·L -1 ,P <0.05), AUC0 -t(785.5 μg·L -1 ·h ±451 .9 μg·L -1 ·h vs 244.8 μg·L -1 ·h ±1 68.3μg·L -1 ·h,P <0.05) and AUC0 -∞(804.7 μg·L -1 ·h ±445.6 μg·L -1 ·h vs 251 .4 μg·L -1 ·h ±1 73.4 μg·L -1 ·h,P<0.05 )between the two groups.Conclusion SH could significantly inhibit the elimination of DM,the substrate of CYP2D1 /2 in rats.

Aim To establish a LC-MS/MS method for determination of 5-HT, NE, DA and observe the con-centration of 5-HT, NE, DA in rat plasma of CUMS. Methods Twenty-two male SD rats were divided into control group and model group. Model group was given 9 kinds chronic unpredictable mild stimulating factors every day. 21 days later, behavior and orbital blood were measured before and after modeling. Using benzo-yl chloride as a pre-column derivatization reagent, three analytes and IS were derivatized before LC-MS/MS detection. Change in three kinds of neurotransmit-ter concentration was measured in rat plasma before and after modeling. Results After modeling, com-pared with control group, the weight of rats in model group was declined significantly ( P<0. 05 ) . Horizon-tal scores, vertical scores and sugar consumption were declined significantly ( P <0. 01 ) . Calibration curves of 5-HT, NE, DA were linear between 1. 47 ~752, 1. 75 ~898 , 2. 05 ~1 053 μg · L-1 and LOQ were 1. 47, 1. 75, 2. 046μg·L-1 ,respectively. The recov-ery of 5-HT, NE, DA from plasma was over than 70%, and RSD of inter-day and intra-day assay was limited in 15%. Compared with control group, the con-centration of 5-HT, NE, DA in rat plasma of model group was declined to ( 3. 99 ± 1. 21 ) , ( 6. 24 ± 1. 94), (6. 07 ± 1. 98) μg·L-1(P <0. 01). Con-clusion After making CUMS model of depression, three kinds of neurotransmitters in rat plasma are de-creased.

This study aimed to explore the impact of depression caused by chronic unpredictable mild stress (CUMS) on in vivo activity of six kinds of CYP450 isoforms in rats. According to 'Katz' method, the model of CUMS was established. Tolbutamide, chlorzoxazone, theophylline, midazolam, omeprazole and dextromethorphan were chosen as probe substrates of CYP2C6, CYP2E1, CYP1A2, CYP3A2, CYP2D1 and CYP2D2 of rats. Plasma concentration of six kinds of CYP450 in control group and model group were determined by LC-MS/MS and computed pharmacokinetic parameters. Consequently, metabolism of theophylline and chlorzoxazone accelerated significantly (P < 0.01), but tolbutamide, dextromethorphan, omeprazole and midazolam had no significant difference. The present study proved that depression caused by CUMS had strong induction to CYP1A2 and medium induction to CYP2E1.
Animals ; Chlorzoxazone ; metabolism ; Chromatography, Liquid ; Cytochrome P-450 Enzyme System ; metabolism ; Depression ; Dextromethorphan ; metabolism ; Liver ; enzymology ; Midazolam ; metabolism ; Omeprazole ; metabolism ; Rats ; Stress, Physiological ; Tandem Mass Spectrometry ; Theophylline ; metabolism ; Tolbutamide ; metabolism

OBJECTIVETo prepare monoclonal antibodies (mAbs) against enoyl-CoA hydratase 1 (ECH1).

METHODSNormal human liver tissues were homogenized, and the mitochondria were isolated by differential centrifugation. The total mitochondrial proteins were used to immunize BALB/c mice to prepare mAbs by routine hybridoma technique. The mAbs were characterized by ELISA, Western blotting and immunohistochemistry. The specificity of the antibody was identified by mass spectrometry (MS) following immunoprecipitation (IP) and confirmed by Uni-ZAP expression library screening.

RESULTSOne clone of the hybridoma BGB095 secreting specific mAb against ECH1 was obtained. The mAb was identified to belong to Ig subclass IgG1 and could be used in ELISA, Western blotting, immunohistochemistry, and immunoprecipitation.

CONCLUSIONA hybridoma cell line stably secreting specific mAb against ECH1 has been established. The specific mAb against ECH1 can be of great value for functional and distribution studies of ECH1.

Animals ; Antibodies, Monoclonal ; analysis ; immunology ; Antibody Specificity ; Blotting, Western ; Cell Line ; Enoyl-CoA Hydratase ; immunology ; Enzyme-Linked Immunosorbent Assay ; Humans ; Immunohistochemistry ; Liver ; cytology ; metabolism ; Mice ; Mice, Inbred BALB C ; Mitochondria ; metabolism

OBJECTIVETo study the effects of lead acetate on the expression of brain-derived neurotropic factor (BDNF) and its receptor P75NTR in rat brain.

METHODSLead acetate was given to SD rats by intraperitoneal injection (ip) for 5 days at the dosage of 25, 50 and 100mg/kg body weight respectively. The contents of lead in serum, cerebral cortex and hippocampus were measured by atomic absorption spectrophotochemistry. The levels of BDNF mRNA and protein expression in cerebral cortex and hippocampus were observed by RT-PCR and immunohistochemistry, respectively. The levels of P75NTR protein expression in rat brain were measured by immunohistochemistry.

RESULTSCompared with the control, the contents of lead were significantly increased in serum, cerebral cortex and hippocampus in the treatment groups respectively (P < 0.01, P < 0.05). The BDNF mRNA expression in the cerebral cortex (0.52 +/- 0.05, 0.33 +/- 0.03) and hippocampus (0.77 +/- 0.10, 0.92 +/- 0.08) of 50, 100 mg/kg treated groups was significantly higher than that of the control group (0.52 +/- 0.05, 0.33 +/- 0.03), respectively (P < 0.05). The results of immunohistochemistry showed that the area density of BDNF protein in cerebral cortex of every treatment group (0.040 +/- 0.027, 0.048 +/- 0.027, 0.086 +/- 0.040) was significantly increased whereas the average gray value (187.11 +/- 11.15, 180.53 +/- 5.82, 180.15 +/- 8.01) was significantly lower than that of the control (0.026 +/- 0.005, 204.98 +/- 3.45) (P < 0.05, P < 0.01). The area density of BDNF protein in hippocampus of every treatment group was 0.040 +/- 0.027, 0.048 +/- 0.027, 0.086 +/- 0.040, respectively, which was significantly increased compared with the control (0.045 +/- 0.019, P < 0.05). The average gray value of BDNF protein in hippocampus (181.03 +/- 5.16, 171.25 +/- 12.65) of 50, 100 mg/kg were significantly lower than that of the control (198.98 +/- 6.40, P < 0.01). There was no positive expression of P75NTR protein in the control and 25 mg/kg body weight groups. The positive expression of P75NTR protein was detected in 50 and 100 mg/kg body weight groups.

CONCLUSIONLead can increase the BDNF and P75NTR expression in rat brain which might play an important role in the neural damage and repair.

Animals ; Brain ; drug effects ; metabolism ; Brain-Derived Neurotrophic Factor ; biosynthesis ; Dose-Response Relationship, Drug ; Female ; Immunohistochemistry ; Male ; Organometallic Compounds ; toxicity ; Random Allocation ; Rats ; Rats, Sprague-Dawley ; Receptor, Nerve Growth Factor ; biosynthesis ; Reverse Transcriptase Polymerase Chain Reaction

OBJECTIVETo investigate the expression and the role of secreted frizzled-related protein 2 (SFRP2) in the earlobe keloid and find a valid way to treat the keloid with gene therapy.

METHODSThe expression of SFRP2 mRNA and protein was tested with in situ hybridization and Western Blot Analysis method in the different period of earlobe keloid.

RESULTSThe SFRP2 mRNA and protein expression at the keloid edge was significantly high in 12 month group than in 3 or 6 month groups (P < 0.01), but not than in 24 month group. The SFRP2 expression started to decrease in the keloid center 12 month later (P < 0.01). The SFRP2 expression was always higher in edge than in center during all the period (P < 0.05, P < 0.01).

CONCLUSIONSThe results suggest that SFRP2 may play an important role in the development of keloid, especially at the keloid edge. The high SFRP2 expression in endothelial cells and surrounding tissue is also important. It may be a new way for gene therapy of keloid by decreasing the SFRP2 expression.

Adolescent ; Adult ; Ear ; Female ; Humans ; Keloid ; metabolism ; Male ; Membrane Proteins ; metabolism ; Middle Aged ; Young Adult