Child ; Endocarditis, Bacterial ; Female ; Follow-Up Studies ; Heart Neoplasms ; microbiology ; pathology ; surgery ; Humans ; Mitral Valve ; Myxoma ; microbiology ; pathology ; surgery ; Neisseria lactamica ; Neisseriaceae Infections

Objective To stratify the risks of patients with acute pulmonary embolism (APE) and pulmonary hypertension (PH) by dynamic pulmonary perfusion imaging (DPPI) and pulmonary perfusion imaging (PPI). Methods From October 2007 to February 2009, 20 healthy volunteers ( 12 males, 8 females; mean age =48.47 ±13.47 years) and 31 APE patients (21 males, 10 females; mean age =47.68 ±18.06 years; from October 2007 to July 2009) were included in the study. DPPI and PPI were performed in all subjects. Percentage of perfusion defect scores ( PPDs% ) were calculated by semi-quantitative analysis of PPI. Risk levels were defined according to PPDs% calculated from PPI: normal (PPDs% =0); very low risk (0 ＜ PPDs% ≤10% ); low risk (10% ＜ PPDs% ≤20% ); moderate risk (20% ＜ PPDs% ≤40% );high risk (40% ＜ PPDs% ≤60% ) and very high risk ( PPDs% ＞ 60% ). Lung equilibrium time (LET)was calculated on region of interest (ROI) drawn over DPPI. Clinical risk was scored by Aujesky method.The t-test, ANOVA and correlation analysis were used with SPSS 13.0 software. Results ( 1 ) LET in healthy volunteers and APE patients was ( 12.18 ± 3.28) and (32.90 ± 14.29) s respectively (t = 6. 81,P ＜ 0. 01 ). (2) The correlation coefficient, coefficient of determination between LET and PPDs% in APE patients were 0.93 and 0. 87, respectively. The correlation coefficient between LET and clinical risk score was 0.86. (3)The mean LET of APE patients in very low risk (n =5), low risk (n = 12), moderate risk (n=9), high risk (n=4) and very high risk groups (n=1) were (19.59 ±0.04), (25.03 ±0.08),(36.07 ±0. 10), (57.15 ±0.06) and (70 ±0.00) s, respectively. There was significant difference among APE patients with different risk levels (F =16. 78, P ＜0.01). Conclusions ( 1 ) DPPI was a reliable, convenient and non-invasive method for the evaluation of PH in APE. (2) Combined LET of DPPI and PPDs% of PPI was valuable for risk stratification and prognosis estimation in APE patients.

[Objective]To study the relationship between bridging septa thickening in the perinephric space and split renal function in acute unilateral upper urinary tract obstruction.[Methods]50 patients with acute unilateral upper urinary tract obstruction by calculus were analyzed retrospectively. According to the images of multi-slice spiral CT (MSCT)scanning,all cases were divided into thickened bridging septa group(n=25)and normal bridging septa group (n=25),The CT values of renal cortical in the plain(CTp)and renal cortical enhancing(CTe)phase were measured, the difference of increasement value(CTe-CTp)and the CT value ratio of the ipsilateral and opposite in renal cortical phase was analyzed by independent sample T test.[Results]The CT increasement value of bridging septa thickening and normal group were(103±30)HU and(128±24)HU respectively,the difference between the two groups was statistically significant(P<0.01);and CTac/CTuc were 0.81±0.13 and 0.96±0.06 respectively(P<0.01).[Conclusion]Thickening of bridging septa in the perinephric space with acute unilateral upper urinary tract obstruction will weaken the enhancement of renal cortical,and increased the likelihood of split renal function impairing.

OBJECTIVETo evaluate effects of incorporating tetrapod-like zinc oxide whisker (T-ZnOw) antibacterial agent on the antibacterial activity of composite resin, compared with that of the silver-based inorganic antibacterial agent.

METHODSThe minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC) of the two different antibacterial agents against Streptococcus mutans were investigated using the broth dilution test. Then the antibacterial activities of the self-cured composite resin specimens with different incorporating concentrations of the two antibacterial agents were evaluated using direct contact test. And the antibacterial activities of the resin specimens were examined again after 3 months of accelerating aging.

RESULTSThe MIC (MBC) of the T-ZnOw antibacterial agent and silver-based inorganic antibacterial agent were 0.15625 (0.3125) g/L and 0.15625 (0.15625) g/L. When the concentrations of T-ZnOw added to composite resin were 3%, 5%, and 10% (w/w), the antibacterial ratios of the resin specimens were (84.85+/-5.16)%, (94.22+/-3.73)%, and (99.43+/-0.48)% respectively. When the concentrations of the silver-based antibacterial agent added to composite resin were 1%, 3%, and 5%, the antibacterial ratios were (71.01+/-7.67)%, (90.76+/-5.91)%, and (97.19+/-4.10)% respectively. The antibacterial ratios of the resin specimens containing 5% of both antibacterial agents were (89.89+/-5.55)% and (78.79+/-7.81)% respectively after 3 months of accelerating aging.

CONCLUSIONSIncorporation of the T-ZnOw antibacterial agent in composite resin can improve the antibacterial performance of the resin, and the resin exhibits better antibacterial performance than that incorporating silver-based inorganic antibacterial agent after 3 months of aging.

Anti-Bacterial Agents ; pharmacology ; Composite Resins ; pharmacology ; Materials Testing ; Microbial Sensitivity Tests ; Streptococcus mutans ; drug effects ; Zinc Oxide ; pharmacology

This study was purposed to investigate the role of monocrotaline-inducing mouse liver sinusoid endothelial cell (SEC) injury in hepatic veno-occlusive disease. BALB/c mice were randomly divided into 2 groups: control group and monocrotaline group, mice were orally administrated with normal saline or monocrotaline with concentration of 200 mg/kg at days 0, 1, 2, respectively. At days 3, 4, 6, 8 and 10 after oral administration with normal saline or monocrotaline, the liver function (ALT, TBIL, AKP) and liver index were examined, and the percentage of activated platelets were detected by flow cytometry. The SEC, vascular endothelial cells and hepatic fibrosis were observed by staining with hematoxylin-eosin and Masson. Transmission electron microscopy was used to observe sinusoidal endothelial cell damage and platelet adhesion. The results showed that compared with control group, mice in monocrotaline group were characterized by severe damage of SEC, numbers of platelet aggregation and adhesion, central number and sinusoidal fibrosis. The percentage of activated platelets and liver index increased (P < 0.05). The characterization of portal hypertension was presented later, such as dysfunction of liver and ascites. It is concluded that SEC injury induced by monocrotaline may be the first step of hepatic veno-occlusive disease, and this kind of SEC injury is self-limiting, but fibrosis is always observed.
Animals ; Endothelial Cells ; pathology ; Endothelium ; cytology ; Hepatic Veins ; cytology ; pathology ; Hepatic Veno-Occlusive Disease ; chemically induced ; pathology ; Liver Cirrhosis ; chemically induced ; pathology ; Male ; Mice ; Mice, Inbred BALB C ; Monocrotaline ; adverse effects ; Platelet Adhesiveness

BACKGROUNDDilation resistance to stenting in non-calcified coronary plaques was compared in patients with percutaneous coronary intervention (PCI) in order to confirm the clinical usefulness of multislice computed tomography in examining coronary plaque type and to provide information pertaining to the effects of plaque type on dilatation resistance.

METHODSA retrospective analysis of 64-slice computed tomography coronary imaging data collected in the month prior to coronary stenting in 93 patients (65 male and 28 female, mean age of (57.22±7.22) years) was conducted. Non-calcified coronary plaques were divided into lipid-rich (lipid content >25% of plaque volume) and fibrous plaques according to the Hammer-Hansen S method: where lipids, fiber, and intraluminal components were indicated by contrast using Hu values of -100-49, 50-129, and >130, respectively. Clinical features, pre-dilatation balloon specifications and filling pressure, and stent size and release pressure were compared.

RESULTSHigh-sensitivity C-reactive protein levels were higher in the lipid-rich plaque group. In patients with typical symptoms, unstable angina was more commonly observed in the lipid-rich plaque group. No significant differences in low density lipoprotein, pre-dilatation balloon specifications, pre-dilatation pressure, or stent specifications were observed. Stent release pressure in the lipid-rich plaque group ((1130.16±202.04) kPa), was significantly lower than that observed in the fibrous plaque group ((1240.61±193.29) kPa, P = 0.009).

CONCLUSIONSofter, lipid-rich plaques exhibit lower dilation resistance during stenting in PCI patients.

C-Reactive Protein ; metabolism ; Coronary Angiography ; Coronary Artery Disease ; pathology ; surgery ; Female ; Humans ; Lipids ; physiology ; Male ; Middle Aged ; Multidetector Computed Tomography ; Percutaneous Coronary Intervention ; Plaque, Atherosclerotic ; pathology ; surgery ; Retrospective Studies

Objective To investigate the effect of allogeneic adipose derived mesenchymal stem cells (hADSCs) on regulatory T cells (Tregs) in peripheral blood of patients with premature ovarian failure (POF).Methods hADSCs were isolated from adipose tissue using 0.1％ type Ⅰ collagenase digestion.Adipogenic,osteogenic differentiation and surface molecular characterization were also performed.Peripheral blood mononuclear cells (PBMCs) of POF patients were isolated by density gradient centrifugation.PBMCs were co-cultured with 1 × 104,2 × 104 and 1 × 105 hADSCs for 72 hours under the stimulation of phytohemagglutinin (PHA).The proliferation rate of lymphocytes was measured by CCK-8 method,the proportion of CD4+ CD25+ Foxp3+ Treg cells was measured by flow cytometry.Real-time fluorescent quantitative PCR was used to detect the mRNA level of Foxp3+.Results hADSCs were positive for CD90,CD105 and negative for CD34,CD45,and has adipogenic and osteogenic differentiation ability.The results of CCK-8 showed that hADSCs could significantly inhibit the proliferation of lymphocytes compared with that in control group (P＜0.001).Flow cytometry showed that hADSCs could promote the proliferation of CD4+ CD25+ Foxp3+ Treg cells (P＜0.05).The results of qPCR showed that Foxp3+ mRNA expression was obviously up-regulated in all experimental groups compared with that in control group (P＜0.001).Conclusion hADSCs can play an immune regulatory role and promote the proliferation of Tregs in peripheral blood of patients with premature ovarian failure.

OBJECTIVETo investigate the clinical effect of surgery following systemic targeted therapy of tyrosine kinase inhibitors (TKIs) in patients with metastatic gastrointestinal stromal tumors (GIST).

METHODSFrom June 2007 to December 2009, data of 15 consecutive patients with metastatic GIST treated with imatinib/sunitinib followed by surgery were retrospectively analyzed.

RESULTSDisease responses to TKI treatment was categorized into controlled disease (including partial response and stable disease) (6, 40.0%), limited progression (4, 26.7%), and generalized progression (5, 33.3%), respectively. Surgeries were performed after mean 12 months following TKI therapies. Gross complete resection or optimal debulking with minimal residual disease were managed to performed in 8/10 patients with disease controlled and limited progression, while optimal debulking only achieved in 2/5 patients with generalized progression. Surgical morbidity was 20.0% (3/15). After operation, patients with disease controlled and limited progression had a median progression-free survival of 25.0 months and 2-year overall survival rate of 100%. In contrast, for patients with generalized progression, the median progression- free survival was 3 months (P<0.01), and median overall survival 10.5 months.

CONCLUSIONSPatients with metastatic GIST who have controlled disease or limited progression to TKI therapy can benefit from surgical resection. Surgery should be selective in patients with generalized progression since surgery hardly improves survival in these patients.

Adult ; Aged ; Benzamides ; Disease-Free Survival ; Female ; Gastrointestinal Stromal Tumors ; pathology ; therapy ; Humans ; Imatinib Mesylate ; Indoles ; therapeutic use ; Intraoperative Period ; Male ; Middle Aged ; Piperazines ; therapeutic use ; Protein Kinase Inhibitors ; therapeutic use ; Pyrimidines ; therapeutic use ; Pyrroles ; therapeutic use ; Retrospective Studies ; Survival Rate ; Treatment Outcome

BACKGROUNDA high mortality rate of pancreatic cancer becomes a bottleneck for further treatment with long-term efficacy. It is urgent to find a new mean to predict the early onset of pancreatic cancer accurately. The authors hypothesized that genetic variants of cationic trypsinogen (PRSS1) gene could affect trypsin expression/function and result in abnormal activation of protease activated receptor-2 (PAR-2), then lead to pancreatic cancer. The aim of this study was to elaborate some novel mutations of PRSS1 gene in the patients with pancreatic cancer.

METHODSTotally 156 patients with pancreatic cancer and 220 unrelated individuals as controls were enrolled in this study. The mutations of PRSS1 gene were analyzed by direct sequencing. K-ras Mutation Detection Kit was used to find the general k-ras gene disorder in the pancreatic cancer tissue. Then the clinical data were collected and analyzed simultaneously.

RESULTSThere were two patients who carried novel mutations which was IVS 3 + 157 G > C of PRSS1 gene in peripheral blood specimens and pancreatic cancer tissue. What's more, it was surprising to find a novel complicated mutation of exon 3 in PRSS1 gene (c.409 A > G and c.416 C > T) in another young patient. The complicated mutation made No. 135 and No. 137 amino acid transfer from Thr to Ala and Thr to Met respectively. No any mutation was found in the normal controls while no mutations of k-ras gene were detected in the three patients.

CONCLUSIONMutations of PRSS1 gene may be an important factor of pancreatic cancer.

Adult ; Asian Continental Ancestry Group ; Female ; Humans ; Male ; Mutation ; Pancreatic Neoplasms ; genetics ; Trypsin ; genetics

OBJECTIVETo investigate the clinicopathological characteristics between mucinous gastric cancer (MGC) and poorly differentiated gastric cancer(PDGC) and factors associated with prognosis.

METHODSMedical records of 1016 consecutive patients with gastric cancer were retrospectively reviewed. Sixty-eight patients with MGC and 508 with PDGC were identified. Clinicopathologic characteristics and overall survival data were analyzed.

RESULTSAs compared to PDGC patients, patients with MGC were significantly older [(59.2±11.9) years vs. (54.1±13.2) years], had significantly more distant metastasis(36.8% vs. 23.8%), more peritoneal seeding(29.4% vs. 16.9%), and less radical resection(60.3% vs. 76.6%). There were no significant differences in 5-year survival rate between MGC and PDGC patients(29.4% vs. 35.5%). However, for tumors in the middle third of the stomach, the survival rate of MGC patients was lower than that of PDGC. Using a Cox proportional hazard ratio model, lymph node involvement and radical resection were independent prognostic factors for survival of MGC patients, while tumor invasion, lymph node involvement, and radical resection were associated with survival in patients with PDGC.

CONCLUSIONAlthough MGC and PDGC differ in age, frequencies of peritoneal seeding, distant metastasis, and rate of radical resection, overall survival is comparable.

Aged ; Female ; Humans ; Male ; Middle Aged ; Prognosis ; Retrospective Studies ; Stomach Neoplasms ; classification ; pathology