Computer-based online research was performed in Pubmed Database from January 1995 to January 2008, China National Knowledge Infrastructure (CNKI) and Vip Database from January 2001 to January 2008. Forty-four publications referred to the seeding cell sources of tissue engineering heart valve demonstrated some disadvantages of clinically used mechanical prosthetic valve and biological valve. Tissue-engineered heart valve had advantages, such as no anticoagulant therapy, infection resistance, cellular viability and the potential to grow and to repair. Seeding cells have different sources, such as blood vessels, bone marrow, blood, umbilical cord, chorionic vesicle and embryonic stem cells, with particular regard to cell phenotypes and their suitability for extracellular matrix production for tissue engineering purposes. Despite an exciting potential for tissue-engineered heart valves, significant technical barriers and clinical problems must be solved and overcome. Further studies should be conducted before widespread clinical application can be envisioned, such as biodegradable polymers, stem cell differentiation, understanding how to harvest the potential of endogenous recruitment of cells and techniques to non-invasively assess the speed and quality of tissue healing and remodeling. This needs to engender a host of novel testing strategies and methods, which will include in vivo safety studies and preclinical studies.

The investigations on the interactive relationships of DNA replication, damage repair and recombination have been locating in the frontline and becoming one of the hotspots in today's life science research. More and more studies show that the processes of DNA replication, damage repair and recombination are both independent and interdependent in the molecular level. These pathways coordinate and conform each other through interactions of many critical proteins in the pathways, by which DNA molecules, known as genetical materials, can be well maintained in cell and faithfully transferred through cellular generations. By using E. coli as a model system, the recent progresses and the possible rules underlying E. coli DNA replication, repair and recombination have been analyzed. As it is believed that the researches on E. coli DNA replication, repair and recombination may be capable of providing clues to the eukaryotic research based on the universal conservations of the critical proteins in the pathways.

Objective To investigate C‐reactive protein in patients with acute brain injury (CRP) ,platelet (PLT) dynamic chan‐ges and clinical significance .Methods A hospital in 2014-2015 120 cases of acute brain injury ,depending on whether surgery di‐vided into :64 cases of surgical group ,56 cases of non‐surgical group .According to Glasgow Outcome Scale (Glasgow Outcome Score ,GOS) divided into 61 cases of poor prognosis group (GOS 1 -3 scores) ,59 patients with good prognosis (GOS 4 -5 scores) .Another choice the same period 50 cases of healthy control group .After the patients were injured 1 d ,3 d ,7 d dynamic tes‐ting CRP ,PLT levels .Results The surgical group and the non‐surgical group patients after injury 1 d serum CRP levels were sig‐nificantly increased ,decreased gradually after all ,the two groups showed a downward trend ,but the surgery group were decreased slowly ,always maintain a high level ,still significantly at 14 d the control group (P<0 .05) .Patients with non‐surgical group de‐creased significantly ,significantly higher than the decline in the extent of the surgery group (P<0 .05) .Surgical and non‐surgical group patients after injury when PLT 1 d showed no increased after 3d began to rise ,increased significantly when 7 d ,PLT levels were elevated degree of surgical group was significantly higher than the non‐surgical group (P<0 .05) .Good prognosis group and a poor prognosis group ,serum CRP on admission were increased ,and reached a peak after 1 d ,after declining in both groups ,with good prognosis group decreased significantly ,while the poor prognosis group ,no significant decline in CRP levels ,continued high levels of state for a long time When postoperative 7d still significantly higher than the normal level (P<0 .05) .At each time point the poor prognosis group ,serum CRP levels were significantly higher than the good prognosis group (P< 0 .05) .When the good prognosis group and a poor prognosis group was mean change 1d PLT little water ,began to increase after the 3 d were poor progno‐sis group of patients was significantly higher than 7 d PLT good prognosis group (P<0 .05) .Conclusion Patients with acute brain injury CRP ,PLT dynamic changes are certain rules ,is to determine the acute phase of the disease of brain injury and prognosis of change .

BACKGROUND: Previous studies demonstrated that smooth muscle injury or ischemia/reperfusion injury result in tissue factor (TF) increasing. However, few reports concern the expression and mechanism of TF in venous bypass grafting.OBJECTIVE: To examine changes in TF protein expression in response to venous bypass grafting.DESIGN, TIME AND SETTING: The animal observation experiment was performed at the Department of Cardiovascular Surgery, Affiliated Union Hospital of Tongji Medical College, Huazhong University of Science and Technology from May 2006 to May 2008.MATERIALS: A total of 30 Sprague-Dawley (SD) rats.METHODS: Rats were underwent interposition bypass grafting of the common carotid artery via the ipsilateral external jugular vein. Namely, the proximal end of external jugular vein was ligated at the joints of external jugular vein and internal jugular vein, and the distal end of external jugular vein was ligated before branches. The proximal and distal ends of common carotid artery were occluded by artery clamp, and a 5 mm artery was removed. The proximal end of artery was anastomosed with distal end of artery, and the frontal wall was sutured with posterior wall. After that, the proximal end of external jugular vein was cut down and coincided with the distal end of common carotid artery.MAIN OUTCOME MEASURES: The expression of TF and proliferating cell nuclear antigen (PCNA) was detected by immunohistochemistry. Meantime, TF activity in vessel protein extracts was determined with TF activity assay kit, and the thickness of intima, media were calculated by computer imaging analysis system. The contralateral external jugular veins were served as the control.RESULTS: The adventitia of all vessels showed abundant TF staining. In early vein grafts, TF staining was markedly increased in the intima and media. However, intimal and media TF staining was absent in the contralateral control jugular veins and late vein grafts. The number of PCNA positive cells was increased in the vein grafts at day 3 after grafting, obvious increased at day 7, and reached the peak at day 14. TF activity in whole-vessel protein extracts was similar in control veins and early and late vein grafts. The thickness of neointima of the vein graft increased significantly at days 7, 14, and 28, and the thickness of media increased significantly at days 14 and 28.CONCLUSION: The changes of TF expression at various time points may relate to hyperplasia of neointima.

Objective To analyze mRNA and protein expressions of plasminogen activator and plasminogen activator inhibitor-1 using microdissection and quantitative real-time PCR,and to analyse their associations with microvascular diseases in IgA nephropathy.Methods Twenty-four IgA nephropathy patients treated in Kidney Center and Kidney Laboratory of PLA from 2000 to 2004 were admitted into the study;20 renal glomeruli or 200 renal tubules and peritubular interstitial per patient were captured by Laser Microdissection System from IgA nephropathy renal biopsy slides(8 ?m),and mRNA was extracted.PA mRNA and PAI-1 mRNA levels in glomerulus and tubulointerstitial area were measured by Taqman quantitative real-time PCR.Capillaries densities in glomerulus and tubulointerstitial area were measured using immunohistological staining method and computer image analysis system.Results With the aggravation of lesions,the glomeruli and peritubular capillaries densities of IgA nephropathy decreased.The glomerular and peritubular capillaries densities were negatively associated with the level of serum creatinine(R2=0.6946 and R2=0.6271,P

Objective To compare the results of mitral valve reconstruction and replacement as treatments for moderate to severe ischemic mitral regurgitation(IMR), and report the mid-term outcome. Methods From June 2002 to May 2008, 83 pa-tients with moderate IMR(35 cases) and severe IMR (48 cases) underwent coronary artery bypass grafting(CABG) combined with mitral valvuloplasty (MVP) (n = 43) or mitral valve replacement (MVR) (n = 40). There were 49 males and 34 females with a mean age of (59.3±7.5) years(51 -77years). The procedures of MVP included annuloplasty with a Dacron or autologous per-icardium ring in 21cases, commissural annuloplasty in 9, quadrangular resection of the posterior leaflet in 9 and using St. Jude mitral annuloplasty ring in 4. In the cases underwent MVR, 28 patients received mechanical prostheses and 12 received biopros-theses. Results 30-day mortality rate was 2.3% for MVP and 5.0% for MVR (P >0.05). The 30-day complication rate was similar for the 2 groups but mechanical ventilation time was longer for MVR patients. Mild MR ocurred in 6 patients with MVP (P <0.05). Sevonty-six patients were followed by outpatient department visit or telephone for (20.2 ± 4.9) months (3 - 60 months). During the follow-up period, 7 patients with MVP had mild insufficiency but free off etber complications. All the valve prothesis functioned well. However, 3 cases had thromboembolic complications and 7 late deaths were recorded in MVR group. Five-year complication-free survival rate was 90% for MVP group and 61% for MVR. Conclusion MVP resulted in excellent durability and provided significant mid-term survival benefit over MVR. MVP should be the first choice for patients with chronic IMR.

AIM: To study the effect of berberine on the proliferation of human pulmonary carcinoma cells (PG cells). METHODS: The proliferation of PG cells was determined by using MTT assay. Cell cycle and apoptosis of PG cells were determined by using flow cytometry. Confocal scanning imaging system was used to assay the ROS-releasing level of PG cells. RESULTS: Berberine was shown to inhibit proliferation of PG cells directly and in a concentration-dependent manner (P

OBJECTIVE To investigate the distribution and drug resistance status to pathogens from urinary tract and offer scientific evidence for reasonable usage of antibiotics.METHODS Totally 389 isolates derived from infected urinary tract in mountain area of western Hubei Province from 2002 to 2005 were identified and antibiotic susceptibility test was performed.RESULTS Escherichia coli accounted for 66.1% ranking the first.The isolates were all susceptible to imipenem and vancomycin.The ratio of ESBLs in E.coli and Klebsiella pneumoniae was 23.7% and 25.9%,respectively.CONCLUSIONS The drug resistance rate in isolates derived from infected urinary tract of patients in mountain area was lower than in plain region of Hubei Province.

Objective Rho signaling component α-catulin,is a cytoskeletal linker protein and plays an important role in apoptotic and senescence resistance,cytoskeletal reorganization,mobility,invasion and epithelial to mesenchymal transition(EMt)of cancer cells. Methods Here,we ex-amined α-catulin expression in squamous epithelium,dysplasia and cancer of head and neck on tissue microarrays by immunostaining. Its expres-sion was compared with clinicopathological parameters and survival rate of cancers. Results It was found that α-catulin expression level was signifi-cantly higher in primary cancers than that in normal squamous epithelium and dysplasia(P < 0.05),but not significantly correlated with aggressive behaviors or adverse prognosis of HNSCC patients(P > 0.05). Cox′s proportional hazard model indicated that distant metastasis and tNM staging were independent prognostic factors for overall survival of the patients with head and neck squamous carcinoma(HNSCC,P < 0.05). Conclusion these findings suggested that up-regulated expression of α-catulin protein may play an important role in the pathogenesis of HNSCC,which might be employed as a potential marker for tumorgenesis of HNSCCs.