BACKGROUND: Traditionally, tendon was repaired by autoallergic tendon transplantation and transfusion; however, both methods were limited by supply region and additional trauma, and the development was slowed down.OBJECTIVE: To summarize biomechanical characteristics of seed cells, stent, and bioreactor during repairing tendon tissue defect, and provide prevention and cure of tendon injury induced by training and competition.METHODS: A computer-based online search was conducted in VIP database with the keywords of "movement training, tendon tissue, repair" from January 2004 to October 2009.Articles which were related to tendon tissue injury induced by movement training were included, but articles related to duplicated research or Meta analysis were excluded.RESULTS AND CONCLUSION: Tissue-engineered tendon has achieved therapeutic effects to a certain degree; however, it is still not used for clinical application.Source of seed cells was restrict to autoallergic tendon cells; on the other hand, comparison between fibroblast and tendon cells, gene chip was used to modify gene in order to solve source of seed cells of tissue-engineered tendon.During regeneration of tendon, normal mechanical stimulation played an important role in moulding of newborn tendon.Because the stimulation might induce orientation arrangement of newborn collagen fiber, enhance mechanical strength of newborn tendon, make sure the functional training as eady as possibly, effectively reduce tendon adhesion, and provide an ideal stent for great circulation of tendon repairing.Scientific training is necessary for coaches and athletes to avoid from tendon tissue injury during movement training and competition.Although tendon tissue engineering has developed well, it still brings adverse effect on body and mind.

To establish and manage of multicentral collection bio-sample banks of malignant tumors from digestive system, the paper designed a multicentral management system, established the standard operation procedures (SOPs) and leaded ten hospitals nationwide to collect tumor samples. The biobank has been established for half a year, and has collected 695 samples from patients with digestive system malignant tumor. The clinical data is full and complete, labeled in a unified way and classified to be managed. The clinical and molecular biology researches were based on the biobank, and obtained achievements. The biobank provides a research platform for malignant tumor of digestive system from different regions and of different types.
Biological Specimen Banks ; organization & administration ; Digestive System ; pathology ; Humans ; Neoplasms ; Specimen Handling

Objective To investigate the change of connexin (Cx) in mesenteric artery (MA) and aorta of spontaneously hyper‐tensive rats (SHR) and normotensive rats .Methods Quantitative RT‐PCR and Werstern blot technique were used to compare the difference in the expression of Cx37 and Cx40 mRNA and protein in MA and aorta of SHR and normotensive rats .Results The level of Cx37 mRNA expression in MA from SHR was decreased compared with that of the normotensive rats (P<0 .05) ,and more significantly in aorta (P<0 .01) .Cx40 mRNA expression in MA from SHR was significantly decreased compared with that of the normotensive rats (P<0 .01) ,but no change in aorta (P>0 .05) .The expression of Cx37 protein in MA from SHR was decreased compared with that of the normotensive rats (P<0 .05) ,and more significantly in aorta (P<0 .01) .Cx40 protein expression in MA from SHR was significantly decreased compared with that of the normotensive rats (P<0 .05) ,but no change in aorta (P>0 .05) . Conclusion Hypertension may could decrease gap junctional communication in cells of MA and aorta from SHR by the downregu‐lation of the expression of Cx37 and/or Cx40 .

Objective To investigate the effect of Iodine 125 seeds short time low dose rate irradiation on perineural invasion (PNI) in pancreatic cancer Capan-2 cells,and explore its molecular mechanism.Methods The co-culture model was established by co-culturing the dorsal root ganglion (DRG) of SD rat and Capzn-2 cells line,while Capan-2 culture model and DRG culture model was also established.Iodine 125 seeds short time low dose rate irradiation tablet was used for the 3 models,and the model without irradiation was used as control.Cancer cell and DRG growth was observed under inverted microscopy,surface of neurite and cell colony growth was determined by image analysis software.The concentration of nerve growth factor (NGF),transforming growth factor-α (TGF-α) in cell culture supernatant and matrigel solution was tested by ELISA,and the expression of neurotrophin-3 (NT-3) mRNA was detected by semi-quantitative reverse transcriptase polymerase chain reaction (RT-PCR).Results In the co-culture model,neurite of DRG showed a direction to cancer cells and had a concentrated growth towards cancer cells.And Capan-2 cells formed more colonies towards neurite.However,in irradiation groups,the symbiotic phenomenon was inhibited to some degree.Increased surface of neurite in co-culture model at 5th day was 290.15 ± 12.08,which was significantly higher than that in DRG group (124.83 ± 6.96,P ＜ 0.01),but the surface of neurite was decreased to 201.53 ± 12.20 after irradiation (P ＜0.01).Increased surface of Capan-2 cell was 300.47 ± 12.99,which was significantly higher than that in Capan-2 group (199.30 ± 8.60,P ＜ 0.01),but the surface of Capan-2 was decreased to 202.35 ± 7.97 after irradiation (P ＜ 0.01).NT-3 mRNA was seldom or not expressed in supernatant of co-culture model,but it was strongly expressed (0.68 ± 0.04) after irradiation (P ＜ 0.05).The concentration of NGF and TGF-α in supernatant of co-culture model were (27.56 ± 13.73),(40.86 ± 20.73) ng/ml,after irradiation they were increased to (94.98 ± 33.80),(157.54 ± 83.76) ng,/ml,and the difference between the two groups was statistically significant (P＜0.05 or ＜0.01).The concentration of NGF and TGF-α in matrigel lysate of co-culture model were (60.42 ± 33.03),(64.39 ± 21.52)ng/ml,after irradiation they were increased to (132.52 ±53.01),(138.38 ±83.58)ng/ml,and the difference of NGF concentration between the two groups was statistically significant (P ＜ 0.05).Conclusions Iodine-125 seeds short-time low-dose rate irradiation could inhibit interactions between nerve and Capan-2 cells,and the mechanism may be related to up-regulation of cancer cells perineural invasion promoter NGF,TGF-α and NT-3.

Objective To study the effect of assistive functional rehabilitation exercise on cardiac functioning of patients with chronic heart failure (CHF). Methods Sixty CHF patients were divided randomly into a treatment group (the rehabilitation group) and a control group, with 30 in each group. All the patients were administered routine therapy. In the treatment group, the patients were administered rehabilitation exercises with the assistance of a electric equipment made by the authors, daily for 5 days a week for a total of 3 months. The New York Heart Association (NYHA) cardiac function grading, the left ventricular ejection fraction(LVEF), the left ventricular end diastolic diameter (LVEDD) and the brain natriuretic peptide (BNP) level in plasma as well as the 6 min walking range were observed in both groups before and after treatment. Results After 3-months of treatment, the NYHA grading, LVEF, LVEDD, BNP level in plasma and 6 min walking range were all significantly improved in both groups when compared with those before the treatment, with the treatment group improved to a significantly larger extent than the control group ( p<0.05 ). Conclusion Assistive rehabilitation exercise in addition to the routine therapy can significantly help improve the cardiac function in CHF patients.

Objective To establish the orthotopic human pancreatic cancer model in mice and study the method to detect the tumor growth. Methods Human pancreatic cancer cell lines SW1990 in logarithmic phase was made into cell suspension and in situ injected into the envelope of pancreatic tail of BALB/c nude mice. High-frequency endoscopy ultrasound was used to observe the growth of tumor mass and its imaging characteristics were studied. Results 20 nude mice were successfully implanted, and 1 died 25 h after implantation. 14 days after implantation, the tumor of pancreatic cancer on EUS was (8.09 ± 2.61) mm3, the tumor appeared as homogeneous hypoechoic mass with clear boundary, and envelope as well as sound halo was present, and the shape was regular; there was low speed circular vasculature signal in around 30% of tumor.The tumor size increased to (12.40 ± 3.51)mm3, and the shape of 70% tumor was irregular, and some appeared as lobulated, and the tumor appeared as heterogeneous hypoechoic mass, no necrosis or liquefaction was found 28 days after implantation. There was low speed circular vasculature signal in around 70% tumors.Conclusions The orthotopic pancreatic cancer model in nude mouse can be established by in situ injection and this method is relatively ideal because it is simple and effective. The high frequency probe of endoscopic ultrasonograph is a reliable method for monitoring implanted pancreatic cancer.

BACKGROUND:Recent studies have found that bone marrow mesenchymal stem cels that culturedin vitro for a long time can naturaly differentiate into neural stem cels, which then differentiate into neurons and glial cels, thereby providing a new therapeutic thinking for Parkinson’s disease, sequela of cerebral infarction, cerebelar atrophy and brain dysplasia.
OBJECTIVE:To discuss the influence of neural stem cel transplantation on neurologic function of rats with cerebral hemorrhage at recovery stage and the relevant mechanism of action.
METHODS: Sixty male Sprague-Dawley rats were randomly divided into normal group (n=18), cerebral hemorrhage group (n=21) and transplantation group (n=21). Cerebral hemorrhage models were established in the latter two groups using VII type colagen enzyme induction method. At 21 days of modeling, rats in the transplantation group were injected neural stem cels via the tail vein, and those in the other two groups received the same volume of normal saline. At 7, 14, 21 days after cel transplantation, modified adhesive removal test (MST) was employed to evaluate the neurologic function of rats, and then the rats were kiled. RT-PCR was used to detect angiopoietin-1 mRNA expression in the bleeding tissues, and western blot assay was employed to measure tyrosine kinase receptor-2 protein expression.
RESULTS AND CONCLUSION:Compared with the normal group, the MST scores in the cerebral hemorrhage group and transplantation group were significantly decreased (P< 0.05). From the 7th day after transplantation, MST scores in the transplantation group were significantly higher than those in the cerebral hemorrhage group (P < 0.05). At 7, 14, 21 days after transplantation, expressions of angiopoietin-1 mRNA and tyrosine kinase receptor-2 protein were ranked as folows: transplantation group > cerebral hemorrhage group > normal group, and there was a significant difference among the three groups (P< 0.05). These findings indicate that neural stem cel transplantation can effectively promote the neurologic recovery of rats with cerebral hemorrhage at recovery stage, and the concrete mechanism may be related to the increase of angiopoietin-1 mRNA and tyrosine kinase receptor-2 protein in the bleeding tissues.

Objective To evaluate the effects of adiponectin on the mitochondrial damage in septic rats with lung injury .Methods Sixty male Wistar rats ,aged 7-8 weeks ,weighing 180-220 g ,were randomly divided into 3 groups (n=20 each) using a random number table :sham operation group (S group) ,sepsis group (SEP group) and adiponectin group (APN group) .The animals were anesthetized with intraperitoneal 2% pentobarbital sodium 50 mg/kg .Sepsis was produced by cecum ligation and puncture (CLP) .In APN groups ,gene recombinant adiponectin 6 mg/kg was injected intraperitoneally at 12 h after CLP .At 24 h after the operation ,10 rats from each group were chosen and sacrificed ,and lungs were removed for detection of interleukin-6 (IL-6 ) and high-mobility group box-1 (HMGB1 ) contents . The mitochondria of lung samples were isolated for measurement of the malondialdehyde (MDA ) content and degree of mitochondrial swelling and mitochondrial activity . The survival rates within 7 days after operation were recorded in the left 10 rats in each group .Results Compared with S group , IL-6 and HMGB1 contents in lung tissues and MDA content in the mitochondria were significantly increased ,the degree of mitochondrial swelling was increased , and the mitochondrial activity and survival rates within 7 days after operation were decreased in SEP group ( P<0.05 ) . Compared with SEP group , IL-6 and HMGB1 contents in lung tissues and MDA content in the mitochondria were significantly decreased ,the degree of mitochondrial swelling was reduced ,and the mitochondrial activity and survival rates within 7 days after operation were increased in APN groups ( P< 0.05 ) .Conclusion Adiponectin can attenuate lung injury and raise the survival rates in septic rats ,and reduction of mitochondrial damage in lung tissues is involved in the mechanism .

Objective:To analyze the trends of coronary heart disease mortality in Tengzhou city of Shandong province from 2013 to 2021.Methods:The data of coronary heart disease (ICD-10: I20-I25) from January 2013 to December 2021 were obtained from the Chronic Disease Surveillance Information System-Coronary Heart Disease Management Module of Shandong province; the population data were provided by Tengzhou Public Security Bureau. The 95% confidence interval ( CI) of the rate was calculated using the binomial exact method. The age-standardized mortality rate (ASMR) was calculated based on 2020 National Population Census. The trends of mortality rate were analyzed using the Cochran-Armitage trend test. Results:During 2013 to 2021, there were 20 667 coronary heart disease deaths in Tengzhou city, with an average of 2 296 cases per year. The male-to-female ratio was 1.09∶1, and 80.98% (16 736/20 667) of the death cases were aged 65 years or older. The crude mortality rate and ASMR of coronary heart disease were 131.84/10 5 and 168.22/10 5 in 2013, respectively. The crude mortality rate increased by 13.67% from 2013 to 2021 ( P<0.001) with an average annual increase of 1.59%; while the ASMR decreased by 18.65% from 2013 to 2021 ( P<0.05) with an average annual decease of 2.34%. The crude mortality rate of coronary heart disease in men and women showed an upward trend, with the difference in the increase for women being statistically significant ( P<0.01); while the ASMR both in men and women showed a downward trend ( P<0.001). The crude death rates from 2013 to 2021 in age groups of 65 or older for men and women decreased by 22.40% and 19.73%, respectively (both P<0.001); while the crude death rate for age groups of 44 or younger in men showed an upward trend ( P<0.05). The crude death rate among urban residents decreased by 5.22% from 2013 to 2021 with an annual decrease of 0.67% ( P>0.05); while the crude death rate among rural residents increased by 19.29% with an annual increase of 2.18% ( P<0.001). The overall crude death rate among urban residents was higher than that among rural residents (all P<0.05). Conclusions:From 2013 to 2021, the crude mortality rate of coronary heart disease in Tengzhou city of Shandong province shows an increasing trend while the age-standardized mortality rate shows a decreasing trend. The crude mortality rate of coronary heart disease in people aged 65 and above shows a decreasing trend. In addition, the change trends are different between women and men, and between urban and rural areas.

Objective To explore the prevalence of mild cognitive impairment (MCI) among elderly veterans. Methods 2 674 veterans ( aged 60 years and over) from 26 military sanatorium in Shijiazhuang city were studied. The Mini-Mental State Examination, Global Deterioration Scale, Activity of Daily Living, Hachinski Ischemic Scale and Hamilton Depression Scale were served as screening tools. Results The prevalence of total MCI was 8 08% in elderly people. The standardized prevalence of MCI was 6 87% in male and 10 38% in female (P