Atherosclerosis ; metabolism ; Cyclooxygenase 2 ; metabolism ; Humans

Child ; Child, Preschool ; Female ; Humans ; Infant ; Infant, Newborn ; Male ; Prognosis ; Staphylococcal Scalded Skin Syndrome ; diagnosis ; drug therapy

The paper described efforts made by Guangdong province to achieve a goal of the healthcare reform Serious diseases can be treated within the county.In this reform,the province attempts such operation mechanisms as autonomous type,guided type and trusted type for the purpose of elevating the service capabilities of county-level public hospitals.To this end,four independent operation mechanisms have also been built for talent development,remuneration incentive,specialty development,and cost control.All these efforts aim at encouraging the hospitals to improve service capability and quality.

ObjectiveTo evaluate the feasibility of detecting the mutations of KRAS,EGFR in nonsmall-cell lung cancer and colorectal cancer patients with high resolution melting curve analysis. MethodsAt first,the mutations in KRAS exon 2 and EGFR exons 18 to 21 of 5 patients with non-small cell lung cancer and 5 patients with colorectal cancer were detected by high resolution melting curve analysis.Then the results were confirmed with direct sequencing. ResultsBy high resolution melting curve analysis,1 of 10 patients was found to carry EGFR 19 mutation who was harboring 2236-2250del mutation.By direct sequencing,consistent results of the patients with mutations orwithout mutations were got. Conclusion s The new high resolution melting curve analysis was more efficient,more convenient than direct sequencing.Moreover,it was a low-cost test,which was suitable for clinic test.

Liver ferritin of Sphyrna zygaena(SZLF) with purity of mass spectrum was prepared in batch. Under) the condition of acidifying medium at pH 1.0, PAGE showed that SZLF subunits treated for 20 min began) to dissociate. A whole process of subunit dissociation and recombination was monitored by transmission electron microscopy(TEM). In addition, the changes of size of both protein shell and iron core were also determined) by TEM directly. It was found that in the acid dissociation process of SZLF subunits, the size of iron) core and protein shell showed the same trend of change, which might be related to not only the iron release) of inner iron core but the dissociation and unfolding of the protein shell. The passway of SZLF recombination is a fast step, which is a conversion process from incompact moltenglobule to compact ferritin. Under the assistant of matrix acidity pH 3.0 and laser, SZLF mixed with horse spleen ferritin(HSF) still has capacity to release) its subunits to form subunit ions for mass analysis by a MALDI-TOF mass spectrometer, which indicates that the interaction intensity between the subunits was weaken but they were not unfolded under this pH condition. TEM technology can be applied in studying both dissociation and recombination in ferritin subunits.

Objective To evaluate the effect of isoflurane preconditioning on cell apoptosis during renal ischemia-reperfusion (I/R) in rats.Methods Thirty male Sprague-Dawley rats, aged 12-14 weeks, weighing 300-320 g, were randomly divided into 3 groups (n =10 each) using a random number table: sham operation group (group S);I/R group;isoflurane preconditioning plus I/R group (group Iso+I/R).The rats were anesthetized with intraperitoneal pentobarbital sodium 30 mg/kg.To establish the model of renal I/R injury, the right kidney was removed, and the left renal pedicle was occluded for 30 min with atraumatic mini-clamp for 30 min, followed by 2 h reperfusion.In Iso+I/R group, 1.5％ isoflurane was inhaled for 1 h, followed by 30 min of washout before I/R.In S and I/R groups only oxygen 2 L/min was inhaled for 1 h.Arterial blood samples were taken at 2 h of reperfusion to determine the concentrations of serum creatinine (Cr), blood urea nitrogen (BUN) and cystatin C (CysC).The animals were then sacrificed, and left kidneys were sampled for determination of the cell apoptosis (by TUNEL), expression of p53, Bax and Bcl-2 mRNA (using real-time fluorescent quantitative PCR), and expression of Bax, Bcl-2, and caspase-3 (by Western blot analysis).The Bcl-2/Bax ratio was calculated.Results Compared with group S, the serum Cr, BUN, and CysC concentrations were significantly increased, the Bcl-2/Bax ratio was decreased, Bcl-2 mRNA, Bax mRNA, Bcl-2, Bax and caspase-3 expression was up-regulated, and AI was increased in group I/R.Compared with group I/R, the serum Cr, BUN, and CysC concentrations were significantly decreased, the Bcl-2/Bax ratio was increased, Bcl-2 mRNA, Bax mRNA, Bax and caspase-3 expression was down-regulated, and AI was decreased in group Iso+I/R.There was no significant difference in p53 mRNA expression among the three groups.Conclusion Regulating the balance between Bcl-2 and Bax and inhibiting apoptosis in kidney cells are involved in the mechanism by which isoflurane preconditioning reduces renal I/R injury in rats.

Objective To study the effect of early enteral nutrition(EN) and total parenteral nutrition(TPN) in patients with severe acute pancreatitis by a mata analysis.Methods Randomized controlled trials of TPN and early EN in patients with severe acute pancreatitis were searched in Medline,Pubmed and Embase from Jan 1970 to June 2009,and Cochrane Library(Issue 2,2009).Seven studies were enrolled into the analysis.The detail about the trial design,characters of the subjects and results of the studies were reviewed by two independent authors and analysed by using Revman 5.0.18 software.Results Compared with TPN,early EN was associated with a significantly lower incidence of pancreatic infections(OR =0.38,95% CI :0.18～0.82,P =0.01),organ failure(OR =0.43,95% CI :0.23～0.79,P =0.007),fewer surgical interventions(OR =0.34,95% CI :0.18～0.63,P =0.0006) and mortaily(OR =0.41,95% CI :0.19～0.88,P =0.02).However,there was no significant difference in total infections [ OR =0.43,95% CI(0.17,1.10),P =0.08]between patients with TPN and early EN.Conclusions Early EN could be the preferred nutrition feeding method for patients with severe acute pancreatitis.

Objective The rational medication route of puerarin was explore d by studying the concentration- time curve and by comparing the histological and organic distribution difference of puerarin administered by intravenous injecti on or gastric gavage in mice, so as to supply a referential data for its rationa l application. Methods The NIH mice were used as experimental subject. The pu erarin concentrations in the plasma, tissue and organs at different time points were determined by HPLC. The PK solutions 2.0 program, a noncompartmental model software, was applied to calculate the pharmacokinetic parameters of puerarin an d to construct its plasma concentration- time curve. Results (1)The pharmacok inetic parameters of puerarin in mice were shown that the T1/2E of puerarin susp ension (0.2 mg? g- 1) by oral administration is 38.061min, CL =991.534 mL? mi n- 1, Cmax =3.6? g? mL- 1, Tmax =30 min, and AUC(0- ∞ ) =201.7? g? min? mL- 1, the bioavailability of puerarin suspension is 3.77 % compared to i.v puerarin injection. (2) Administered by intravenous injection (i.v), the puerari n distributed in the liver, kidney, plasma, spleen, muscle, lung, uterus and tes ticle rapidly, and the concentration of puerarin was the highest in the liver an d kidney and lower in the heart and brain. Distribution of puerarin suspension b y oral administration is similar to puerarin injection by i.v. However, the conc entration of puerarin in the tissues and organs by oral administration was lower than by i.v; the liver/heart, liver/brain, kidney/heart and kidney/brain concen tration ratios of puerarin by gavage administration were lower than those by i.v . Conclusion The bioavailability of puerarin by oral administration was poor, but the histological distribution characteristics of puerarin shows that the tox ic and side effects of puerarin are lesser by oral use than by intravenous injec tion.

BACKGROUND:A variety of embryonic stem cells induction and differentiation systems have been established so far, while the research that promotes embryonic stem cells to differentiate into hematopoietic stem cells is stil at an initial stage, and the induction efficiency needs to be improved.
OBJECTIVE:To active the Wnt/β-catenin signal pathway in mouse embryonic stem cells with exogenous win3a as an inducer, and then to observe whether the activation of this pathway wil promote the directional differentiation of embryonic stem cells into hematopoietic progenitor cells.
METHODS:The ES-E14TG2a mouse stem cells were cultured with the exogenous wnt3a (100 μg/L) for 21 days, the content ofβ-catenin was tested by cellimmunofluorescence and western blot, and expression of Wnt downstream target gene was detected by quantitative reverse transcription PCR to determine the activation of Wnt/β-catenin signal pathway. Single-layer adherent culture method was used to induce the directional differentiate of above-mentioned cells into hematopoietic stem cells, and detection of hematopoietic development associated surface marker CD34+/Sca-1+was achieved by flow cytometry;meanwhile, the expression of hematopoietic associated gene was measured by quantitative reverse transcription PCR.
RESULTS AND CONCLUSION:We found thatβ-catenin accumulated in ES-E14TG2a mouse stem cells after cultured with wnt3a (100 μg/L) for 21 days;the expressions of Wnt downstream target genes such as Pitx2, Frizzled, Sox17 and Oct4 showed the different degrees in increase, meaning the activation of Wnt/β-catenin signal pathway. Furthermore, during the time that we used single-layer adherent culture method to induce hematopoietic stem cells, the CD34+/Sca-1+cells accounted for 20.2%of total cells at day 14, and control cells only accounted for 11.9%. Again, expression quantity of hematopoietic associated gene BMP4, FLK2 and CD34 increased while Smad5 was suppressed significantly. Our data suggest that sustaining action by wnt3a wil active Wnt/β-catenin signal pathway, and also promote the directional differentiation of ES-E14TG2a mouse stem cells into hematopoietic progenitor cells.

Animals ; Antibody-Producing Cells ; drug effects ; Female ; Immunity ; drug effects ; Male ; Mice ; Mice, Inbred BALB C ; Phenols ; toxicity ; T-Lymphocytes ; drug effects