BACKGROUND:It is difficult to make an exact conclusion about the correlation between atherosclerosis and hemodynamic wal shear stress because of the complexity of the hemodynamic environment in the field of atherosclerosis research.
OBJECTIVE:To analyze the relationship between characteristics of mural coronary artery hemodynamics parameters and atherosclerosis through myocardial bridge-coronary artery analog device.
METHODS:Myocardial bridge-coronary artery analog device was used to simulate experiments in vitro. In the condition of keeping any related parameters unchanged, such as system temperature, the average flow rate and heart rate, we observed and recorded the changes of proximal and distal mean value and oscil atory value of shear stress of mural coronary artery by regulating the oppression level of myocardial bridge to mural coronary artery.
RESULTS AND CONCLUSION:Under 0%oppression, there was no significant difference in distal and proximal mean value and oscil atory value of shear stress of mural coronary artery. Under 50%oppression, the proximal oscil atory value of shear stress was significantly larger than that in the distal end. Under 80%oppression, mean shear stress in the distal end was larger than that in the proximal end. Oscil atory value of shear stress in the proximal end was larger than that in the distal end. With increased oppression, the mean shear stress in the distal end was higher than that in the proximal end, but oscil atory value in the proximal end was higher than that in the distal end. These results indicated that the increase of the oscil atory value of the proximal shear stress of mural coronary artery is an important factor for the occurrence of atherosclerosis.

Objective: To investigate the direct protective effect of SiniTang (SNT) on cultured myocardial cells of neonatal rats injuried by hypoxia and reoxygenation. Methods: The contracting frequency and content of primary-cultured myocardial cells sampled from different groups (control, oxygen and glucose deprivation model, and theated groups with 8. 0, 17. 9, 40, 89. 4, 200?g/mL SNT) were determined by TV recording system and computer image analysis system at different time (hypoxia for 30min, 60min, 90min, 120min, 150min, 180min and reoxygenation for 30min, 60min). The LDH activity in culture media was measured colorimetrically. The quantity of surviving myocardial cells was measured with MTT reduction method. Results: The contraction frequency and range of cultured myocardial cells decreased during hypoxia, the myocardial cells'pulsation of the groups treated with SNT was kept longer than the oxygen and glucose deprivation model, and the myocardial cells treated with SNT of 200?g/mL pulsed again after reoxygenation. After hypoxia for 3 hours, the LDH release of oxygen and glucose deprivation model was significant higher than that of the control ( P

Objective To investigate the effectiveness and safety of dexmedetomidine combining with sufentanyl in controlling PCIA after laryngeal carcinoma surgery. Methods One hundred laryngeal carcinoma patients (ASAⅠorⅡ) were randomly assigned into 2 groups (n = 50, in each group). Group SF: sufentanil 0.04 mg/(kg·h)+dolasetron 12.5 mg; Group DE: dexmedetomidine 0.1 mg/(kg·h) +sufentani 0.02 mg/(kg· h) +dolasetron 12.5 mg, in which all drugs were dissolved in 100 mL 0.9% normal saline. Parameters: Infusion speed 2 mL/h; PCIA dosage 0.5 mL each time; monitor time: 15 min. PCIA were administrated after anesthesia recovery; BP, HR, SpO2, RR, RPP, pain and sedation score, side effect formation rate at 4、12、24、48 h after surgery were also recorded. Results MAP, RPP and HR in group DE were significant decreased compared with group SF at each time point,(P < 0.05); VAS scores had no significant difference between the two groups(P >0.05); Ramsay calm scores in group DE were significant better than that in group SF at each time point after surgery (P < 0.05); Frequency of nausea,vomiting and chills in group DE were significant lower than those in group SF (P < 0.05). Conclusion Small dose dexmedetomidine combination with sufentanil administration in PCIA after laryngeal carcinoma surgery could acquire satisfied analgesic effect , also could eliminate the patient anxious mood , enhance the security in the perioperative period and improve the patients' satisfaction degree , whichis very suitable for multi mode analgesia acquirement.

Objective To explore the value of intravenous low dose furosemide on visualization of upper urinary tract during CTU. Methods 39 cases of normal upper urinary samples were examined by CTU with 5 minutes delayed,19 cases underwent intravenous injection of furosemide.The upper urinary tract was divided into 5 parts for scoring of images on a 5 score scales for opacification,the average value of ureter short axis of distention,and CT value by contrast material were measured.Results were analyzed by t test using SPSS.Results (1)30/38 segments of upper urinary tract were all or almost all opacification in furosemide group,the scores of upper urinary tract were higher than that of the control group,which had significant difference except the pelvis and left proximal ureter segments. (2)The disention of the ureter was significantly higher for all segments in furosemide group.(3)CT values in furosemide group decreased significantly for all upper urinary tract.Conclusion CTU excretory phase image acquisition with intravenous low dose furosemide is helpful on visualization of upper urinary tract.

BackgroundHigh myopia is one of leading causes of blindness,so far the pathogenesis remains unclear.Two single-nucleotide polymorphisms (SNPs) of rs6885224 and rs12716080 in CTNND2 gene were recently found to be associated with high myopia in Singaporean Chinese.But whether these SNPs are related with the pathogenesis of high myopia in Han Chinese is worth studying,Objective This study was to investigate the relationship between the genetic variations of the CTNND2 gene and high myopia in Han Chinese.MethodsA case-controlled association study was designed.Nine hundred and thirty-three individuals with high myopia and 1227age- and gender-matched normal subjects were included in this study.The 5 ml of periphery blood was obtained from all subjects for the extraction of genomic DNA.The target DNA was amplified using PCR and purified by the SNaPshot method.Four SNPs rs12716080,rs917012,rs6885224 and rs16901340 in the CTNND2 gene were genotyped.This study was approved by the Ethic Committee of Sichuan Provincial People Hospital.Written informed consent was obtained from each subject before his/her enrollment.Results The frequencies of the genotypes rs6885224,rs12716080,rs917012,rs16901340 SNPs were in Hardy-Weinberg equilibrium (HWE) ( P=0.181,0.085,0.732,0.313,0.264,0.663,0.084,0.196).There were no significant differences in genotypes frequency distribution ( in turn P =0.654,0.406,0.828,0.403 ) and allele frequency distribution of the CTNND2 gene ( in turn P =0.377,0.209,0.743,0.198) between the high myopia group and normal control group.The haplotypes (TA and GA)frequencies of rs12716080 and rs917012 in the high myopia group were significantly different from those of the normal control group(TA:0.784 vs.0.719;GA:0.087 vs.0.136) (x2 =6.115,P=0.013 ;x2 =6.634,P=0.010),but those of GG were similar between the high myopia group and normal control group ( 0.123 vs.0.143,x2 =0.889,P =0.346). ConclusionsThe SNPs rs12716080,rs917012,rs6885224 and rs16901340 in CTNND2 gene were not responsible for high myopia,however,the haplotypes of rs12716080 and rs917012 are susceptible for high myopia in Han Chinese.

Antigens, CD20 ; metabolism ; Female ; Follow-Up Studies ; Humans ; Interferon Regulatory Factors ; metabolism ; Leg ; pathology ; Lymphoma, Large B-Cell, Diffuse ; complications ; metabolism ; pathology ; surgery ; Middle Aged ; Proto-Oncogene Proteins c-bcl-2 ; metabolism ; Skin Neoplasms ; complications ; metabolism ; pathology ; surgery ; Thrombocytopenia ; complications

A UPLC method has been developed in the current investigation for simultaneous determination of nine chemical markers of Bletilla striata, 4-hydroxymethylphenyl beta-D-glucoside, blestroside, dactylorhin A, militarine, dihydrophenanthrene 5, gymnoside V, dihydrophenanthrene 1, benzylphenanthrene 3 and gymnosides IX. Separation was performed at 45 degrees C on an ACQUITY UPLC BEH C18 column (2.1 mm x 150 mm, 1.7 microm) with a gradient solvent system of acetonitrile-water as the mobile phase. The flow rate was 0.3 mL x min(-1), the detection wavelength was 280 nm. The results showed that the nine chemical markers could be well resolved and that in the selected linear range, all calibration curves of the nine chemical markers showed good linearity (r > or = 0.999 3). The recoveries (n = 6) were in the range of 98.15% - 102.2% and RSDs were between 2.1% - 3.6%. The data suggested that the developed UPLC-UV method had good reproducibility, robustness, and accuracy, which was suitable for the quality control of Bletilla striata. Applications of the method showed that the nine chemical markers had higher contents in the wild B. striata than in the cultivated ones.
Chromatography, High Pressure Liquid ; methods ; Drugs, Chinese Herbal ; analysis ; isolation & purification ; Magnoliopsida ; chemistry ; Rhizome ; chemistry

Study the serum level of HGF, Cys C and TGF-beta1 in type 2 diabetic nephropathy (DN), the infect of Pingshen decoction on those index. Selected 69 cases of 2 type DN and randomly divided into therapy group (36 cases) and control group (33 cases). The therapy group were treated with Pingshen decoction 1 dose/d, bid po. The control group were treated with NephritisShu tablet, 6 tablet, tid po. 8 weeks was a course. Before and after treatment, we examine the serum level of HGF, Cys C and TGF-beta1 by ELISA and immunonephelometry, and compare with 30 cases of healthy control group. The study demonstrates that before treatment, the serum level of HGF in both groups were significantly lower than healthy control group (P < 0.01), but Cys C, TGF-beta1 were significantly higher (P < 0.01). After treatment, the serum level of HGF of both groups were increased. The serum level of HGF of therapy group were significantly higher than of control group (P < 0.01), but the serum level of Cys C and TGF-beta1 were significantly lower than control group (P < 0.01). The serum level of HGF was correlated negatively with Cys C,TGF-beta1. In control group, the UAER, urine beta2-MG and quantity of 24-hour urine protein were significantly decreased after treatment (P < 0.01). The index of urine of therapy group were significantly lower than control group (P < 0.01). Results indicate that test of serum level of HGF and Cys C,TGF-beta1 of diabetic nephropathy have important clinical significance. Pingshen decoction can effectively intervene in the serum level of HGF and Cys C, TGF-beta1 and index of urine.
Aged ; Aged, 80 and over ; Case-Control Studies ; Cystatin C ; blood ; Diabetic Nephropathies ; blood ; drug therapy ; Drugs, Chinese Herbal ; adverse effects ; therapeutic use ; Female ; Hepatocyte Growth Factor ; blood ; Humans ; Male ; Middle Aged ; Transforming Growth Factor beta1 ; blood

Background Primary conjunctival lymphoid hyperplasia exhibit atypical clinical symptoms and easy to cause misdiagnosis and mistreatment.Understanding the clinical characteristics of primary conjunctival lymphoid hyperplasia is of an important clinical significance.Objective This study was to analyze the clinical characteristics and therapeutic outcome of patients with primary conjunctival lymphoid hyperplasia.Methods The medical records of 20 patients with primary conjunctival lymphoid hyperplasia who was treated in Beijing Tongren Hospital from January 2012 to December 2014 were retrospectively analyed.The age,symptoms,therapy,prognosis,histopathological features and immonochemistry results were reviewed,and the treating approach targeting to different types of conjunctival lymphoid hyperplasia was evaluated.The fellow-up duration was 1-2 years.Results Age of the patients ranged from 27 to 83 years old.The lesions were classified as benign lymphocytic hyperplasia,atypical lymphoid hyperplasia and lymphoma.Majority of lesions located in fornix conjunctiva tissue (90％).Follicle-like appearance was seen in the benign lymphocytic hyperplasia,and pink elavation was exhibited at the bulbar conjunctiva in the atypical lymphoid hyperplasia.A diffuse salmon fish like appearance in conjunctiva was the primary feature of conjunctival lymphoma.Histopathological examination showed that conjunctival benign lymphocytic hyperplasia had follicle-like tissue in lesions,atypical lymphoid hyperplasia exhibited diffuse lymphocyte filtration,and conjunctival lymphoma appeared monocyte filtration.The 3 tpyes of lesions also could be differentiated by immunochemistry.The medicine was applied in the eyes with benign lymphocytic hyperplasia,and the combination of resection of lesions with conjunctival tissue or amniotic membrane transplantation was used for the atypical lymphoid hyperplasia or lymphoma eyes.No recurrence of the lesions was found during fellow-up duration.Conclusions The clinical manifestations of conjunctival lymphoid hyperplasia lesions are varied,and it is easy to be confused with chronic ocular surface diseases.Pathology and immunochemistry are helpful for the differential diagnosis.The treating regimen is dependent on the lesion type.Most patients have a favorable prognosis with treatment.

Objective To investigate the effects of saturated fatty acids and unsaturated fatty acids on proliferation and autophagy of human lung cancer cells. Methods The lung cancer cells A549 were treated with stearic acid (saturated fatty acid) and doconexent (DHA, unsaturated fatty acid), respectively, in concentrations of 0, 30, 60, 120 and 240μmol/L. MTT test and cell clone formation assay were performed to detect the proliferation of A549 cells. The morphology of A549 autophagy was observed by confocal laser scanning microscopy after A549 cells were treated with stearic acid or DHA for 24 hours. Western blotting assay was used to detect the expression of autophagy-related protein after A549 cells were treated with stearic acid or DHA for 12, 24 and 36 hours, respectively. Results 30-240μmol/L stearic acid or DHA both inhibited the proliferation of A549 cells (P<0.05). Both stearic acid and DHA induced autophagy of A549 cells, meanwhile, down-regulated Phospho-mTOR (ser2481) and up-regulated LC3Ⅱ/LC3Ⅰ of A549 cells (P<0.05). Conclusions Both saturated fatty acid and unsaturated fatty acid can inhibit the proliferation and induce autophagy of lung cancer cells. The mechanisms of autophagy may be related to Phospho-mTOR (ser2481) signaling pathway.