Human blood circulatory system is a very complex organism and it requires to solve many problems. The cardiovascular circulatory system could be better understood by using modern technology. Cardiovascular circulatory system is the key part of human physiological system, establishing mathematical models of cardiovascular circulatory system and stimulating blood circulation will provide assistant tool for the design of medial equipment in treatment of heart disease, also plays an instructive role on determining the causes and therapy of heart diseases. This paper describes the history, categories and methods of cardiovascular circulatory system modeling. The research cardiovascular simulator model, designed by Harvard-MIT,was used as an example of how to establish a cardiovascular circulatory model.

Objective To detect the reactive samples of enzyme-linked immunosorbent assay (ELISA1) by chemiluminescence microparticle immunoassay (CMIA),and to analyze the application value of CMIA in HCV infection validation of blood donors.Methods Nucleic acid 3-item combined testing (NAT),another ELISA2,HCV antibody supplementary test(Western Blot test,WB) and CMIA test supplemented in blood samples of 102 ELISA1 anti-HCV reactive blood donors were retrospectively analysed.Results Among 102 blood donors of anti-HCV positive,32 cases (31.37%,32/102) were HCV RNA reactive samples,50 cases (49.02%,50/102) were ELISA2/WB reactive simultaneously.With CMIA NAT results as the reference standard,CMIA was poorly correlated with HCV RNA (Spearman correlation coefficient rs=0.395,P<0.01),and the consistency between them was weak by Kappa test (Kappa=0.270,P<0.01).With ELISA2/WB detection results as the reference standard,CMIA was highly correlated with the results(Spearman correlation coefficient rs=0.713,P<0.01),and which showed high consistency by Kappa test (Kappa=0.674,P<0.01).Conclusion CMIA as a detection method of protein label after HCV infection has great value in the HCV infection confirmation in low-risk population.

AIM: To investigate the changes of G?q/11 and phospholipase C(PLC) of the aorta and to evaluate the role of signal transduction pathway mediated by G?q/11 in the pathogenesis of spontaneous hypertension. METHODS: Blood pressure was measured by intubation of carotid, and the level of plasma angiotension Ⅱ was measured by radioimmunoassay. In addition, G?q/11 and PLC contents in aorta were determined by Western blot analysis. RESULTS: Arterial blood pressure was not changed in 4-week-old spontaneously hypertensive rats(SHR), but it was increased markedly in 12-week-old SHR. The G?q/11 expression of aorta in 4-week-old SHR was increased by 69 2%( P

AIM: To investigate the effect of heme oxygenase on vascular remodeling in renal hypertension. METHODS: Male Wistar rats were randomly divided into sham-operated, 2K1C (two-kidney one-clip) and hemin-induced groups. Four weeks after the treatments, the thickness of aortic media and HO enzymatic activity of the aorta were determined. Immunohistochemical staining was carried out to detect protein of HO-1 in the aorta. RESULTS: The blood pressure in 2K1C renal hypertension rats started to increase two weeks after the surgery and stabled at a high level at the 4th week. Hemin, an inducer of HO-1, markedly inhibited the increase in blood pressure. Aortic medium thickness of the 2K1C rats at 4th week was 27 5% thicker than that in the sham-operated rats. The thickness of aortic medium of the hemin-induced rats was 16 1% less than that in 2K1C group. At the 4th week after operation, protein level and enzymatic activity of HO-1 in aorta were higher than that in 2K1C group compared to those in the sham-operated group. CONCLUSION: Renal hypertension caused vascular remodeling and the activation of HO-1. HO-1 induction decreased the blood pressure of renal hypertension and reduced vascular remodeling.

AIM: To investigate the crosstalk between angiotensin Ⅱ (AngⅡ)-mediated and platelet-derived growth factor (PDGF)-mediated signal transduction in vascular smooth muscle proliferation.METHODS: A model of renal hypertension was made by two kidney/one-clip operation. Level of PDGF receptor ? subunit of aorta was measured by Western Blot analysis. The effect of Ang Ⅱ on PDGF receptor ? subunit expression was investigated in culture rat aortic vascular smooth muscle cells (VSMC).RESULTS: Systolic blood pressure obviously increased at 8th week after operation, whereas the level of PDGF receptor ? subunit of aorta significantly increased by 126.6% ( P

AIM: To investigate the role of G?q/11-mediated signal transduction pathway in cardiac hypertrophy induced by angiotensin II (AngII). METHODS: Renal hypertension was performed by placing a sliver clip around the left renal artery(2K1C). Hemodynamic parameters, the ratio of left ventricular weight to body weight, the AngII contents and the activities of phospholipase C (PLC) in myocardium were measured at 1st, 2nd, 4th and 8th week after operation, respectively. The levels of G?q/11 were assayed by Western blot analysis. -leucine incorporation and levels of G?q/11 were measured in cultured neonatal rats ventricular myocyte after AngII stimulation. RESULTS: In 2K1C group, blood pressure and the ratio of left ventricle of heart to body weight were significantly increased compared with sham group between 2nd to 8th week. AngII content increased from 1st to 8th week after operation. Compared with the sham group, levels of G?q/11 in 2K1C group increased by 25.0% and 35.8% at 4th and 8th week( P

Objective To evaluate the therapeutic efficacy of hook plate and fascia lata graft in management of chronic acromioclavicular joint dislocation.Methods From May 2012 to March 2014,a total of 16 cases of chronic acromioclavicular joint dislocation (Rockwood type Ⅲ) were treated with hook plate and fascia lata graft.They were 10 men and 6 women,from 19 to 57 years of age (mean,34.7 years).Seven cases were at the left side and 9 at the right side.All injuries resulted from direct violence.The time from injury to surgery ranged from 8 to 54 weeks (mean,12.4 weeks).At the final follow-ups,the shoulder function was assessed using the Quick Version of the Disabilities of the Arm,Shoulder and Hand Score (DASH) and visual analogue scale (VAS),and the efficacy using Karlsson's evaluation system.Results All surgical wounds primarily healed.The dislocation of acromioclavicular joint was corrected,without any vascular or neural damage.The patients were followed up for an average of 12 months (from 6 to 18 months).No plate breakage,screw loosening or redislocation was observed.The DASH and VAS scores of the shoulder at the final follow-ups (25.42 ± 8.34 and 2.22 ± 1.70,respectively) were significantly improved,compared with the preoperative ones (43.72 ± 12.35 and 6.33 ± 1.37,respectively) (P ＜ 0.05).According to the Karlsson's criteria,10 cases were excellent,4 good and 2 moderate.Conclusion In management of Rockwood type Ⅲ chronic acromioclavicular joint dislocation,hook plate and fascia lata graft can restore dynamic balance and stability of the acromioclavicular joint,resulting in solid fixation,early joint motion and limited complications.

Objective To investigate the clinical efficacy of our self-designed adjustable weight-bearing brace for AO type B tibial shaft fractures managed by interlocking intramedullary nail.Methods A total of 68 consecutive patients with AO type 42-B tibial shaft fracture who had been managed from April 2013 to March 2015 hy interlocking intramedul]ary nail were recruited into our study.They were randomized into 2 equal groups (n =34).Group A received conventional therapy after operation while group B received auxiliary mauagement with our self-designed adjustable weight-bearing brace after conventional postoperative therapy for one week.The 2 groups were compared at postoperative 1,3 and 6 months and at the final follow-up in terms of visual analogue scale (VAS),weight-bearing status of the affected limb,time for fracture union,Radiographic Union Score for Tibial Fractures (RUST) and Johner-Wruhs scale.Results Of this series,62 cases were followed up for 12 to 18 months (average,14.7 months),5 ones were lost to the follow-up and one withdrew.The mean VAS scores at 3-month and 6-month follow-ups for group B were 2.5 ± 0.8 and 0.9 ± 0.6 respectively,significantly lower than those for group A (3.0 ± 0.9 and 1.4 ± 0.8 respectively) (P ＜ 0.05).In group A at 1-month,3-month and 6-month follow-ups,the weight-bearing status was 44.1％ ± 17.5％,72.0％ ±17.4％ and 86.4％ ±12.5％ while the mean RUST scores were 5.4±1.4,8.7±1.1 and 10.3 ± 1.1,respectively.In group B at 1-month,3-month and 6-month follow-ups,the weight-bearing status was 53.8％ ± 11.0％,84.1％ ± 12.2％ and 94.4％ ± 10.6％ while the mean RUST scores were 6.5 ± 0.8,9.9 ± 0.9 and 11.3 ± 0.8,respectively.There were significant differences between the 2 groups in the above indexes (all P ＜ 0.05).Group B achieved clinical fracture union after an average of 3.3 ±0.7 months,significantly faster than group A (3.9 ± 1.0 months) (P ＜ 0.05).According to the Johner-Wruhs scoring,group A had 19 excellent cases and 12 good ones while group B had 27 excellent ones and 4 good ones,showing a significant difference between the 2 groups (P ＜ 0.05).Conclusions Early application of our self-designed adjustable weight-bearing brace for patients with AO type B tibial shaft fracture managed by interlocking intramedullary nail can reduce postoperative pain,accelerate callus growth,shorten bony healing time and achieve satisfactory functional recovery.

Ethylene regulates sex expression in cucumber plants (Cucumis sativus L.). ACC synthase is a key factor during the ethylene biosynthesis. Pairs of PCR primers were synthesized corresponding to the conserved sequences of ACC synthase gene family. The 1 188 bp DNA fragment of ACC synthase gene (CS-ACS2) was amplified from genomic DNA of 8 different sexual phenotypes of cucumber respectively (GenBank accession number is DQ115884～DQ115886 and DQ115875～DQ115879). 8 SNPs have been identified by sequences analysis between 3 monoecious lines and 5 subgynoecious lines and gynoecious lines, which including 4 A←→G and 4 T←→C transition. Of these 8 SNPs, one locus is in intron and 7 loci in exons. Of the 7 SNPs located in exons, 3 SNPs are non-coding SNPs and 4 SNPs are coding SNPs (cSNPs) of which 3 induced changes of encoding amino acid of ACC synthase. The results of SNPs from subgynoecious lines and gynoecious lines suggest that single nucleotide mutation events of CS-ACS2 might be correlated with the development of subgynoecious lines and gynoecious lines in cucumber. Furthermore, CAPS marker C-MT705 was developed for identifying elite subgynoecious cultivar MT-705, which could be valuable in cucumber breeding. Besides, the SNPs and CAPS markers obtained in the study enriched molecular markers of cucumber.

ObjectiveTo identify the finding of functional MRI(fMRI) during active and passive fingers moving in hemipegic patients after stroke.Methods23 stroke patients with hemipegia were asked to actively moving their fingers and then passively moving with others' help.MSEPI technique was performed with planar parallel AC-PC.During each scan series,they were asked to perform repetitive finger-thumb opposition movement in the same period of active and rest.All the scanning data was transferred to a workstation and dealt with statistical method.Some patients examined fMRI again after rehabilitation.ResultsfMRI showed normal in the healthy side,with the decrease or displacement in the affected side of motor cortex area.Motor cortex area in the affected side would be recovered after rehabilitation.ConclusionfMRI can be used to evaluate the difference between active and passive moving motor cortex,and help to judge the prognosis of the patients with motor functional disorder.