Objective To detect the change of cerebral perfusion in pediatric patients with Leigh's syndrome (LS)by using MR perfusion technique.Methods Twelve patients with Leigh's syndrome and thirteen normal children were scanned with the sequence of flow-sensitive alternating inversion recovery exempting separate T_1 measurement (FAIREST).Their relative cerebral blood flow(rCBF)values were obtained in regions of bilateral basilar nuclei and bilateral thalami.Student t-test was used to compare them between the two groups and receiver operating characteristic(ROC)curve analysis was carried out.Results Statistical analysis revealed significant difference between two groups in the regions of bilateral basilar nuclei and right thalamus(t =3.26,P =0.002;t =2.25 ,P =0.018 ;t =2.88 ,P =0.004,respectively).The rCBF values for LS group and control group were 0.432?0.158 and 0.619?0.125 for right basilar nuclear, 0.478?0.186 and 0.621?0.123 for left basilar nuclear,0.630?0.189 and 0.833?0.160 for right thalamus,respectively.The areas under the ROC curves were 0.833 and 0.756 for the rCBF of right and left basilar nuclear,respectively.Conclusion Relative CBF maps may reveal changes of cerebral blood flow in some specific brain regions in patients with Leigh's syndrome.It can provide additional information to the clinicians in the evaluation of the disease.

ObjectiveTo explore the relationship between the negative co-inhibitor programmed death-1 ( PD-1 ) and the pathogenesis of myasthenia gravis ( MG), by detecting the expression of PD-1 and programmed death ligand-1 ( PD-L1 ) on peripheral blood mononuclear cells (PBMCs) and soluble PD-1 (sPD-1) in plasma from myasthenia gravis patients. MethodsPeripheral blood samples were collected from 45 MG patients and 33 healthy persons without prednisone or other immunodepressant treatment during the half year ahead of withdrawal.The expression of PD-1 and PD-L1 on PBMCs were detected using immuno-fluorescence labeling and flow cytometry, and the concentrations of sPD-1 in plasma were measured using an ELISA kit. Results(1) The proportion of CD4+ PD-1 + T cells, as well as CD14+ PD-L1 +monocytes of the MG group was higher than that of the control group. There were no significant differences in the proportion of CD4+ PD-1 + T cells or CD14+ PD-L1 + monocytes in the MG sub-groups between different genders or MG types. While the proportion of CD4+ PD-1 + T cells of the late-onset MG (age ≥40) group was higher than that of the early-onset MG group (age ＜40). And it was higher in the MG patients with thymoma or thymus hyperplasia than that from the MG patients with normal thymus. The proportion of CD14+ PD-L1 +monocytes from the MG patients with thymoma or thymus hyperplasia group decreased obviously compared with that of the patients with normal thymus group; but no difference could be found between the late-onset group and early-onset group. (2)The concentration of sPD-1 in the plasma from the group of MG patients was(6. 92 ±0. 72) ng/ml,which was higher than that of the healthy control group ( (3.28 ±0. 42) ng/ml),even more, it was significantly higher in the early-onset MG group than that of the late-onset MG group,there was a negative correlation( r =-0. 526, P =0. 000) between the age of onset and the concentration of sPD-1. ConclusionsThe increased expressions of PD-1 on CD4+ T cells and PD-L1 on CD14+ monocytes in MG patients suggested the involvement of the couple of molecules in the pathogenesis of MG.Higher concentration of soluble PD-1 in the plasma of patients with MG suggested that it might disturb the ligation of PD-1 and PD-L1 on T cells and antigen presenting cells, which might result in the abnormal transportation of the negative modulating signal, and accelerate the pathological progress of MG.

To investigate the influence of the difference enhancers on the transport mechanism of chlorogenic acid (CGA) across Caco-2 cells model, a RP-HPLC method was adopted to detect the concentrations of CGA. At the concentrations of 20 to 80 microg x mL(-1), the difference of absorption rate constants (K(a)) was not statistically significant. At the concentrations of 40 and 20 microg x mL(-1), the ratios of apparent permeability coefficients (P(app)) of the apical to basolateral and the basolateral to apical were 1.14 and 1.18, respectively. With the effect of enhancers K(a) and P(app) increased, the absorption half-life (T1/2) decreased. CGA passed through the Caco-2 cell membrane mainly by passive transport. It showed that monocarboxylic acid transporter (MCT) could be involved in the across membrane transport process of CGA. Borneol had no effect on the cell membrane transport processes. The order of increasing absorption of CGA caused by the enhancers was sodium lauryl sulphate > sodium taurocholate > carbomer.
Absorption ; Acrylic Resins ; pharmacology ; Caco-2 Cells ; Cell Membrane Permeability ; drug effects ; Chlorogenic Acid ; pharmacokinetics ; Humans ; Sodium Dodecyl Sulfate ; pharmacology ; Taurocholic Acid ; pharmacology

Objective To explore the clinical value and typing characteristic of prenatal ultrasonography for fetal cystic adenomatoid malformation of the lung(CAML).Methods Ultrasonographic features and typing of fetal CAML in 41 cases detected by prenatal ultrasonography were analyzed retrospectively.All cases were followed up until to the induction of labor or birth.Results (1)Site of tumor: in the 41 cases,there were 22 cases on the left side,15 on the right side and 4 on bilateral.(2)Typing diagnosis of prenatal ultrasonography: three cases were CAML type Ⅰ,14 were type Ⅱ,and 24 cases were type Ⅲ.(3)Pathology diagnosis: thirty two cases were induced abortion.CAML was confirmed in 29 cases by autopsy and the classifications were consistent with the prenatal diagnosis of ultrasonography.Three pulmonary sequestration cases were prenatally misdiagnosed as CAML type Ⅲ by ultrasonography.(4)The other nine cases were followed up to birth.Three masses decreased gradually and then disappeared.Six newborns were confirmed as CAML by CT.Their typings were consistent with the postnatal diagnosis.(5)The diagnostic accuracy rate of prenatal ultrasonography for CAML was 92.7%(38/41).Its misdiagnostic rate was 7.3%(3/41).Conclusions Prenatal ultrasonography has a high accuracy rate for the diagnosis and classification of CAML and is the first choice to detect CAML early in pregnancy.It has an important clinical value.Pulmonary sequestration should be distinguished from CAML type Ⅲ because they tend to be confused.

Objective:To analyze the status of ethical management of biobanks in Shanghai public hospitals. Methods :A questionnaire survey on ethical management of biobanks was conducted in 9 representative ethics com-mittees, which were established in public hospitals with biobanks in Shanghai. Results: The ethics committees in Shanghai public hospitals had paid relatively high attention to ethical review of protocols were related to biobanks. Nonetheless, the ethical supervision and training on biobanks in Shanghai public hospitals should be enhanced. Con-clusion:The unified ethical guideline on biobanks should be developed in Shanghai for strengthening the standard-ized ethical management and ethics training to promote the development and use of biological samples library re-sources.

In traditional clinical application, Coptidis Rhizome and Evodiae Fructus have been combined to treat various stomach heat and cold syndromes, gastritis, gastric ulcer and the like. With the application of modem instruments and the development of molecular pharmacologic theory, their chemical constituents and pharmacological effects have been sufficiently studied. In this paper, literatures from Pubmed were adopted, with particular emphasis on findings of international counterparts and studies on compatibility of main chemical components in Coptidis Rhizoma and Evodiae Fructus, in order to elaborate on the scientific comparability of Coptidis Rhizoma and Evodiae Fructus through chemical analysis, and pharmacological and biopharmaceutics studies and introduce the future development trend of the studies.
Animals ; Drug Interactions ; Drugs, Chinese Herbal ; analysis ; pharmacology ; Evodia ; chemistry ; Fruit ; chemistry ; Humans ; Ranunculaceae ; chemistry ; Rhizome ; chemistry

OBJECTIVETo follow up the cohort of a certain factory and analyze the death cause of the employees.

METHODSA dynamic cohort was adopted and the study population consisted of all workers stayed at the factory for more than 1 year. The cohort data was mainly from the personnel ministry in the factory,the death data provided by the personnel ministry,the labour union and the hospital. All cause of death of the all employee and the death condition of radiation group and no-radiation group were analyzed and compared.

RESULTSThe mortality of the workers in the factory was significantly lower than national population, the SMR of all cause of death in all employee, radiation group and no-radiation group were 0.41 (95% CI: 0.37-0.45), 0.24, 0.75 respectively; all cancer death in the three group was 0.59, 0.40 and 0.92. But the death order was different in radiation group and no-radiation group,the order of liver cancer was list first in radiation group, which was unlike that of the nation order and the no-radiation order.

CONCLUSIONThere have no excess death in the factory, but the order of liver cancer is precedence.

Cause of Death ; Cohort Studies ; Female ; Humans ; Male ; Middle Aged ; Neoplasms, Radiation-Induced ; mortality ; Nuclear Reactors ; Occupational Exposure ; Power Plants ; Prospective Studies ; Workplace

OBJECTIVETo investigate the effects and mechanism of cytokine-induced killer (CIK) cells in reversing multidrug resistance (MDR) and increasing intracellular concentration of adriamycin (ADR) in the K562/ADR cells.

METHODSPeripheral mononuclear cells (MNCs) were isolated from healthy donors and cultured with combined cytokines to generate CIK. The changes of cell phenotype and cytokines secretion of CIK were determined. K562/ADR cells were divided into three groups: ADR in combination CIK (group I), CIK alone (group II) and ADR alone (group III). The viability and proliferation of K562/ADR cells were assayed by MTT assay, the intracellular concentration of ADR and the expression of P-glycoproteins (P-gp) in K562/ADR cells by FCM.

RESULTSThe cytotoxicity of ADR in group I was higher than that in group II (P < 0.05). The cytotoxicity was increased with the E/T ratio increasing (P < 0.05) but had no relation with the concentration of ADR in group I (P > 0.05). The expression of P-gp was declined in group I and group II (P > 0.05). The intracellular concentration of ADR in group I was higher than that in group II (P < 0.05), and had no relation with the ADR concentration (P > 0.05).

CONCLUSIONPre-treatment with CIK can increase the cytotoxicity and the intracellular concentration of ADR and decrease the expression of P-gp in K562/ADR cells in the ADR and CIK combination group. Acute leukemia patients would be most likely to benefit from the combination of chemotherapy and CIK therapy.

Antineoplastic Agents ; pharmacology ; Cytokine-Induced Killer Cells ; immunology ; Drug Resistance, Multiple ; immunology ; Drug Resistance, Neoplasm ; immunology ; Humans ; K562 Cells

0.05).Compared with other immunopathologic types,IgA plus IgG plus IgM deposition type had higher proportion of histological grade Ⅲb-Ⅵ(P

OBJECTIVETo explore the short-term impact of ambient PM(10) on daily non-accidental death, cardiovascular and respiratory death of residents in Beijing.

METHODSMortality data of residents in Beijing during 2006 to 2009 were obtained from public health surveillance and information service center of Chinese Center for Disease Control and Prevention, contemporaneous data of average daily air concentration of PM(10), SO(2), NO(2) were obtained from Beijing Environment Protection Bureau (year 2005 - 2006) and public website of Beijing environmental protection (year 2007 - 2009), respectively, contemporaneous meteorological data were obtained from china meteorological data sharing service system. Generalized addictive model (GAM) of time serial analysis was applied. In additional to the control of confounding factors such as long-term trend, day of the week effect, meteorological factors, lag effect and the effects of other atmospheric pollutants were also analyzed.

RESULTSDuring year 2006 to 2009, the number of average daily non-accidental death, respiratory disease caused death, cardiovascular and cerebrovascular diseases caused death among Beijing residents were 140.1, 15.0, 65.8, respectively;contemporaneous medians of average daily air concentration of PM(10), SO(2), NO(2) were 123.0, 26.0, 58.0 µg/m(3), respectively;contemporaneous average atmosphere pressure, temperature and relative humidity were 10.1 kPa, 13.5°C and 51.9%, respectively. An exposure-response relationship between exposure to ambient PM(10) and increased daily death number was found as every 10 µg/m(3) increase in daily average concentration of PM(10), there was a 0.1267% (95%CI: 0.0824% - 0.1710%) increase in daily non-accidental death of residents, 0.1365% (95%CI: 0.0010% - 0.2720%) increase in respiratory death and 0.1239% (95%CI: 0.0589% - 0.1889%) increase in cardiovascular death. Ambient PM(10) had greatest influence on daily non-accidental and cardiovascular death of the same day, while its greatest influence on respiratory death occurred 5 days later.

CONCLUSIONThe ambient PM(10) pollution increased daily non-accidental, respiratory disease caused, cardiovascular and cerebrovascular diseases caused deaths among residents in Beijing, and lag effect existed as for the effect of ambient PM(10) pollution on respiratory disease caused death.

Air Pollutants ; analysis ; Air Pollution ; analysis ; Cardiovascular Diseases ; mortality ; China ; epidemiology ; Environmental Exposure ; analysis ; Humans ; Mortality ; Particle Size ; Particulate Matter ; analysis ; Respiratory Tract Diseases ; mortality ; Time Factors