Diagnostic Techniques and Procedures ; standards ; Fatigue Syndrome, Chronic ; diagnosis ; Humans ; Reference Standards

The purpose of this study was to investigate the molecular mechanisms whereby hydrogen sulfide (H2S) exerts the promoting effect on vascular endothelial cells migration. We used wound healing assay to study the effect of NaHS (H2S donor) on the migration ability of rhesus retinal pigment epithelial cell line, RF/6A cells, under normoxic conditions. Real-time PCR was used to measure hypoxia-inducible factor 1α (HIF-1α) mRNA level. Western blot was used to measure the expression of HIF-1α protein. The probe 2',7'-dichlorofluorescein diacetate (DCFH-DA) was used to measure intracellular reactive oxygen species (ROS) level. The results showed that NaHS (10-100 μmol/L) could significantly promote RF/6A cells migration under normoxic conditions, and this effect could be inhibited by 50 µmol/L HIF-1 inhibitor, CdCl2. NaHS increased the protein level of HIF-1α in a dose- and time-dependent manner, and up-regulated the mRNA level of HIF-1α quickly and continuously. Moreover, NaHS could significantly decrease ROS levels in RF/6A cells under normoxic conditions. These results suggest HIF-1 may mediate the promoting effect of H2S on vascular endothelial cells migration under normoxic conditions. ROS, as an upstream regulator of HIF-1α, may be involved in the migration-promoting effect of H2S.
Animals ; Cell Line ; Cell Movement ; physiology ; Endothelial Cells ; cytology ; Hydrogen Sulfide ; metabolism ; Hypoxia-Inducible Factor 1, alpha Subunit ; genetics ; metabolism ; Macaca mulatta ; RNA, Messenger ; genetics ; metabolism ; Reactive Oxygen Species ; metabolism ; Retinal Pigment Epithelium ; cytology ; Sulfides ; pharmacology

Objective To evaluate the clinical significance of bone scintigraphy in the preoperative diagnosis of sacral tumor. Methods Preoperative 99Tcm-methylene diphosphonate (MDP) whole body bone scintigraphy was performed in total of 103 patients with sacral tumor for whole body survey and radionuclide uptake in the sacral tumor. Of these 103 patients,39 had SPECT. According to the osteoblastic reaction in bone SPECT studies,patterns of tumor with a "hot" lesion was defined as type Ⅰ,a "cold" lesion accompanied with partial uptake was defined as type Ⅱ,a purely "cold" lesion was defined as type Ⅲ,and a "cold" lesion with marginal uptake which produced "doughnut sign" was defined as type Ⅳ. Imaging interpretation was correlated with the final pathologic diagnosis. Results Of the 103 patients,18 ( 17.5% ) had polyostotic involvement. About 46.6% (48/103 ) in planar and 84.6% ( 33/39 ) in SPECT showed decreased uptake at sacrum. Of the bone metastatic patients (n =21 ) ,12 (51.7%) had sole metastasis to sacrum. Tumor with type Ⅰ (6/6) or type Ⅱ (16/19) uptake was likely to be a malignancy,whereas type Ⅲ uptake tended to occur in the benign disease in those patients without polyostotic involvement( 5/7 ),and type Ⅳ was all appeared in giant cell tumors( n = 5 ). Conclusions Preoperative bone scintigraphy is useful in examination of polyostotic involvement for the patients with sacral tumor,but it is limited for diagnosing isolated sacral metastatic disease. Tumor uptake on bone scintigraphy can be helpful in differential diagnosis of sacral tumor.

OBJECTIVETo assess the predictive value of hemoglobin (HGB) levels for non-alcoholic fatty liver disease (NAFLD) by performing a prospective cohort study of NAFLD incidence in a healthy population.

METHODSA total of 2840 individuals in the Xinjiang province were enrolled in the study from 2008 to 2011, based on liver ultrasound showing no evidence of fatty liver disease and the discovery of no major risk factors upon interview. All participants completed an epidemiological questionnaire survey, a physical examination, an abdominal ultrasonography, and gave blood for biochemistry testing. The hazard ratios of NAFLD were compared when the participants were grouped according to HGB level (g/L in quintiles): Q1, less than or equal to 145 for males and less than or equal to 123 for females; Q2, > 145 to less than or equal to 151 for males and > 123 to less than or equal to 129 for females; Q3, > 151 to less than or equal to 155 for males and >129 to less than or equal to 134 for females; Q4, > 155 to less than or equal to 161 for males and > 134 to less than or equal to 139 for females; Q5, > 161 for males and > 139 for females. Between-group comparison of measurement data was carried out by t-test and of percentage or count data by chi-square test. Between group comparison of the HGB level was carried out by one-way ANOVA. The prospective association between HGB levels and NAFLD was assessed by conditioned logistic regression analysis.

RESULTSThe values of body mass index, blood pressure, and triglyceride level were significantly higher in the participants with elevated serum uric acid quartiles. Within the 3-year study period, NAFLD was newly diagnosed in 19.6% of the male participants and 10.1% of the female participants; the difference between males and females reached the threshold of statistical significance (X2 = 51.043, P less than 0.01). The incidence of NAFLD in the quintile groups was 6.10% in Q1, 10.50% in Q2, 13.13% in Q3, 16.95% in Q4, and 22.03% in Q5 (X2 = 70.495, P less than 0.01), and the increasing trend with elevated HGB quartiles was significant (P less than 0.01). In multivariate logistic regression analysis, with adjustment for sex, age, race, metabolic syndrome and its components, the hazard ratios for incidence of fatty liver comparing Q2 to Q5 of HGB concentration to Q1 were 1.125, 1.325, 1.516 and 1.982.

CONCLUSIONElevated HGB concentration is predictive of NAFLD in otherwise healthy subjects and may be used for screening during a routine health check-up.

Adult ; Early Diagnosis ; Female ; Hemoglobins ; analysis ; Humans ; Logistic Models ; Male ; Middle Aged ; Non-alcoholic Fatty Liver Disease ; blood ; diagnosis ; Predictive Value of Tests ; Prospective Studies ; Surveys and Questionnaires

Ibuprofen/ethyl-cellulose (EC)-polyvinylpyrrolidone (PVP) sustained-release composite particles were prepared by using supercritical CO2 anti-solvent technology. With drug loading as the main evaluation index, orthogonal experimental design was used to optimize the preparation process of EC-PVP/ibuprofen composite particles. The experiments such as encapsulation efficiency, particle size distribution, electron microscope analysis, infrared spectrum (IR), differential scanning calorimetry (DSC) and in vitro dissolution were used to analyze the optimal process combination. The orthogonal experimental optimization process conditions were set as follows: crystallization temperature 40 degrees C, crystallization pressure 12 MPa, PVP concentration 4 mgmL(-1), and CO2 velocity 3.5 Lmin(-1). Under the optimal conditions, the drug loading and encapsulation efficiency of ibuprofen/EC-PVP composite particles were 12.14% and 52.21%, and the average particle size of the particles was 27.621 microm. IR and DSC analysis showed that PVP might complex with EC. The experiments of in vitro dissolution showed that ibuprofen/EC-PVP composite particles had good sustained-release effect. Experiment results showed that, ibuprofen/EC-PVP sustained-release composite particles can be prepared by supercritical CO2 anti-solvent technology.
Calorimetry, Differential Scanning ; Carbon Dioxide ; chemistry ; Cellulose ; administration & dosage ; analogs & derivatives ; chemistry ; Crystallization ; Delayed-Action Preparations ; Drug Carriers ; Drug Compounding ; Ibuprofen ; administration & dosage ; chemistry ; Microscopy, Confocal ; Particle Size ; Povidone ; administration & dosage ; chemistry ; Solubility ; Spectrophotometry, Infrared ; Technology, Pharmaceutical ; methods

OBJECTIVETo explore the relationship between gamma-synuclein gene expression and CpG island demethylation in colorectal cancer(CRC), and the relationship between the demethylation and clinicopathological factors of CRC.

METHODSThe expression of gamma-synuclein mRNA was examined in 30 pairs of tumor tissues and tumor-matched non-neoplastic adjacent tissues(NNAT) by RT-PCR. CRC cell lines including COLO205, LoVo, and SW480 were used and treated with a demethylating agent, 5-aza-2'-deoxycytidine(5-aza-C). Before and after the treatment, the expression of gamma-synuclein mRNA in the cells was determined by RT-PCR, and bisulfite sequencing PCR was also used to analyze methylation status of CpG island. The methylation status of gamma-synuclein was then examined in 67 CRC samples and 30 NNAT samples by nested methylation-specific PCR (NMSP) and real time methylation-specific PCR(real-time MSP). The relationship between the demethylation of gamma-synuclein in CRC and clinicopathological factors was analyzed.

RESULTSThe mean gamma-synuclein mRNA expression was 0.66+/-0.34 in CRC samples, which was much higher than 0.45+/-0.26 in NNAT samples(P=0.011). 5-aza-C could induce expression and demethylation of gamma-synuclein in COLO205, LoVo and SW480 cells. gamma-Synuclein gene was demethylated in 80.0%(24/30) of the CRC samples and 50.0%(15/30) of the NNAT samples. The demethylated status of gamma-synuclein was much higher in CRC samples than that in NNAT samples(P=0.030), and was significantly correlated with clinical stage, lymph node involvement, and distant metastasis of CRC(P<0.05).

CONCLUSIONThe upregulation of gamma-synuclein expression in CRC is primarily attributed to the demethylation of CpG island, which may be used as a marker for prognosis.

Cell Line, Tumor ; Colorectal Neoplasms ; genetics ; metabolism ; pathology ; CpG Islands ; DNA Methylation ; Gene Expression Regulation, Neoplastic ; Humans ; Prognosis ; RNA, Messenger ; genetics ; gamma-Synuclein ; genetics ; metabolism

OBJECTIVE: To analyze the clinical characteristics of bloodstream infection (BSI) in patients treated by hematopoietic stem cell transplantation (HSCT). METHODS: The clinical characteristics, distribution of pathogenic bacteria causing BSI and drug sensitivity of 910 patients treated by HSCT in our department from January 2013 to June 2020 were retrospectively analyzed. RESULTS: Among 910 HSCT patients, 111 patients were diagnosed as BSI within 100 days after transplantation, and 98 patients showed BSI during the period of agranulocytosis. Multivariate analysis showed that the usage of anti-thymocyte globulin (ATG), long duration of agranulocytosis and low infusion volume of mononuclear cell (MNC) were the independent risk factors affecting BSI after HSCT. Among 121 pathogenic bacteria isolated, 76 Gram-negative (G^-) bacteria (62.8%), 40 Gram-positive (G⁺) bacteria (33.0%), and 5 fungi (4.1%) were detected out. The top three pathogens were Escherichia coli, Staphylococcus epidermidis and Pseudomonas aeruginosa. The drug-resistance rates of Escherichia coli and Klebsiella pneumoniae to carbapenems was 14.3% and 7.7%, respectively, and Pseudomonas aeruginosa was 66.7%. The susceptibility of G⁺ bacteria to vancomycin, linezolid and teicoplanin was 97.5%, 100% and 100%, respectively. The crude mortality rate of the patients with BSI at 100 days after HSCT was significantly higher than that of patients without BSI (P<0.001). CONCLUSION The usage of ATG, long duration of agranulocytosis and low infusion volume of MNC are independent risk factors for BSI after HSCT. The pathogens after HSCT are mainly G- bacteria. Pseudomonas aeruginosa is highly resistant to carbapenems. Key words　　;
Bacteremia/epidemiology* ; Bacteria ; Hematopoietic Stem Cell Transplantation ; Humans ; Retrospective Studies ; Sepsis

Platelets are reprogrammed by cancer via a process called education, which favors cancer development. The transcriptional profile of tumor-educated platelets (TEPs) is skewed and therefore practicable for cancer detection. This intercontinental, hospital-based, diagnostic study included 761 treatment-naïve inpatients with histologically confirmed adnexal masses and 167 healthy controls from nine medical centers (China, n = 3; Netherlands, n = 5; Poland, n = 1) between September 2016 and May 2019. The main outcomes were the performance of TEPs and their combination with CA125 in two Chinese (VC1 and VC2) and the European (VC3) validation cohorts collectively and independently. Exploratory outcome was the value of TEPs in public pan-cancer platelet transcriptome datasets. The AUCs for TEPs in the combined validation cohort, VC1, VC2, and VC3 were 0.918 (95% CI 0.889-0.948), 0.923 (0.855-0.990), 0.918 (0.872-0.963), and 0.887 (0.813-0.960), respectively. Combination of TEPs and CA125 demonstrated an AUC of 0.922 (0.889-0.955) in the combined validation cohort; 0.955 (0.912-0.997) in VC1; 0.939 (0.901-0.977) in VC2; 0.917 (0.824-1.000) in VC3. For subgroup analysis, TEPs exhibited an AUC of 0.858, 0.859, and 0.920 to detect early-stage, borderline, non-epithelial diseases and 0.899 to discriminate ovarian cancer from endometriosis. TEPs had robustness, compatibility, and universality for preoperative diagnosis of ovarian cancer since it withstood validations in populations of different ethnicities, heterogeneous histological subtypes, and early-stage ovarian cancer. However, these observations warrant prospective validations in a larger population before clinical utilities.
Humans ; Female ; Blood Platelets/pathology* ; Biomarkers, Tumor/genetics* ; Ovarian Neoplasms/pathology* ; China