BACKGROUND:With the development of tissue engineering technology and the deep research of tendon regeneration, many problems caused by traditional tendon transplantation wil be solved. OBJECTIVE:To evaluate and prospect the effects of corresponding mechanical systems on seeding cel s based on the characters of tendon, stem cel s as wel as mechanical systems. METHODS:CBM, CNKI, CqVip and PubMed databases were retrieved for reviews and articles related to tissue-engineered tendon published from January in 2005 to December in 2015. The keywords were“tissue engineering, tendon, tendon stem cel , mechanical stimulation and seeding cel s”in Chinese and English, respectively. Final y a total of 63 articles were selected for overview. RESULTS AND CONCLUSION:As al kinds of stem cel s and the corresponding mechanical systems exhibit advantages and disadvantages when applied for tissue engineering, it is advisable to make appropriate choices according to the research needs. Tendon stem cel s show a broad application prospect in tendon regeneration, which wil grow into required tendon tissues through appropriate, accurate and gentle mechanical stimulations, thereby providing another alternative to improve the tendon healing.

Objective To detect the effect of the antiphospholipid antibodies on the Schwann cells in vitro and to find if the Extract of Ginkgo biloba 761(EGb761)has any protective effects.Methods The immunoglobulins(Ig)were extracted from the serum of the patient with autoimmune polyneuropathies and those with controls.Ig only or Ig plus calf serum(served as complement)were added into the culture solutions of the Schwann cells.The density of the cell in one high power field,the cell perimeter and area were detected and compared to those blank and those controls.Results The shape of the Schwann cells in both the Ig and Ig plus calf serum solution were greatly changed.The densities of the cells in them were both lower than the blank ones,with more severe in the cells with calf serum.There was no significant different between the solutions with or without EGb761.Conclusion Ig from the patients with autoimmune polyneuropathies could attack the Schwann cells in vitro,with the existence of complements,the destruction was even more severe.No protection of EGb761 could be found in these situations.

Objective To assess the value and safety of SonoVue in ultrasonic diagnosis of abdominal diseases. Methods A total of 204 patients (149 male, 55 female) with abdominal examination of contrast-enhanced ultrasonography (CEUS) with SonoVue from August 2007 to February 2009 were reviewed. Results Definitive diagnosis were obtained 215 times in 204 patients (233 times) with abdominal CEUS. The diagnostic accuracy of CEUS was 92.27%, significant higher than that of conventional ultrasonography (62.23%). Anaphylactic shock happened 1 time (0.43%) in 1 patient. Conclusion CEUS with SonoVue can provide a high diagnostic accuracy with relatively safety of the possibility of serious adverse event.

Objective To evaluate the diagnostic advantages of contrast-enhanced ultrasonography in experimental abdominal blunt trauma in comparison of routine ultrasonogrphy. Methods Liver, spleen and kidney blunt trauma models were established in 10 canines and 12 rabbits. Both routine ultrasonography and contrast-enhanced ultrasonography were performed to identify the possible injury. Accuracy of the two ultrasonic technologies was compared in diagnosing each kind of organ and various injury degrees. Results Fifty-six trauma models including 22 livers, 14 spleens and 20 kidneys were established. There was significant difference between two ultrasonic methods in diagnosing liver, spleen and kidney injury (P<0.01);and contrast-enhanced ultrasonogarphy had particular advantage in detecting minor injuries of Ⅰ-Ⅱ scale (P<0.01). Conclusion Contrast-enhanced ultrasonography greatly enhances diagnostic accuracy of blunt abdominal solid organ trauma, especially in minor injuries.

Objective To investigate the expression and significance of interleukin-1β and C-reactive pro-tein(CRP)in atrial fibrillation(AF).Methods Sixteen mongrel dogs were randomly divided into two groups:pa-cing group(n=8)and control group(n=8).High frequency pacing was performed in the pacing group with perma-nent pacernaker but not in the control group.After pacing for 24 weeks,tissue samples were obtained from the left and right atria.The levels of IL-1βand CRP in atria were detected by immunohistochemistry.Results Compared to the control group,the expression level of IL-1β and CRP were significantly enhanced(P<0.05)in atrial tissues during AF.Conclusion IL-1β and CRP may participate in atrial fibrillation formation and play a role in generation and maintaining the artrial fibrillation.

Objective To generalize a valuable classification of mandibular condyle fractures and explore proper measures for such kind of fractures so as to provide reference for clinical treatment. Methods The data of 304 cases with 358 mandibular condyle fractures were analyzed retrospectively. After one year of the initial treatment, X-ray inspection was employed to get the information including mouth opening, pattern of mouth opening, occlusion, facial symmetry and healing condition of mandibular condyles. Results According to classification of position,displacement and age (PDA), 180 mandibular condyle fractures belonged to type Ⅰ, 96 to type Ⅱ and 82 to type Ⅲ, which coincided with the different fractures treated surgically or nonsurgically. All surgical and nonsurgical treatments got satisfactory outcome. Conclusion The classification of PDA is effective in guiding the treatment choice for mandibular condyle fractures. Both surgical and nonsurgical treatment can obtain effective results for corresponding case.

Objective To analyze the clinical characteristics of suspected acute aortic dissection with ST-segment elevation detected by inferior leads in order to avoid the misdiagnosis of acute aortic dissection facilitating an appropriate treatment strategy carried out in time.Methods A total of 14 patients with suspected acute aortic dissection with ST-segment elevation detected by inferior leads were enrolled.Their clinical presentation,ECG features,imaging findings,laboratory testing,coronary angiography results, treatment and outcome were retrospectively analyzed.Results Clinical characteristics of suspected acute aortic dissection with ST-segment elevation detected by inferior leads suggested that hypertension as a single risk factor accounted for 79%.The patients with normal blood pressure or high blood pressure in emergency visits accounted for 86%.The amplitude of ST elevation in lead Ⅲ was greater than that in lead Ⅱ,and lead Ⅲ accompanied with ST elevation in lead V1 or V4R accounted for 86%.Significantly elevated D-dimer >2 000 ng/mL was found in those patients.Coronary angiography showed that the opening of coronary artery not seen,normal coronary arteries or a simple right coronary artery proximal lesion.Transesophageal echocardiography and computed tomography angiography were used to identify the diagnosis with 100%accuracy.The mortality rate of this group was 50%.Conclusions Patients with acute aortic dissection evidenced by ST-segment elevation detected by inferior leads are in critical setting of high mortality. Emergency surgical treatment can significantly improve the survival rate of patients.

Objective To establish an anti-hepatitis E virus (HEV) enzyme-linked immunosorbent assay (ELISA) one-step assay based on seven glutathione S-transferase (GST)-fusion recombinant proteins derived from different HEV genotypes and subtypes. Methods Concentration of the coating antigen was optimized by block titration. The cut-off values were determined for anti-HEV IgG and IgM, respectively. Assay sensitivity, specificity and reproducibility were investigated using samples with confirmed anti-HEV positive. Results An optimal concentration of mixture of recombinant proteins (Mix166) was 1.5 mg/L for antigen coating. Coefficient of variations (CV) of anti-HEV within-run and between-run were 8.67% and 10.85%, respectively. CV of anti-HEV IgM within-run and between-run were 4.56% and 5.99%, respectively. Positive rates of anti-HEV IgG and IgM were both 94% for 50 HEV-polymerase chain reaction (PCR) positive sera tested with the one step assay. Using one-step assay to detect 674 serum samples from healthy people, 52 samples were found anti-HEV IgG positive and 3 samples were anti-HEV lgM positive. A series of serum specimens collected at different time points until 76 weeks from a chimpanzee challenged with HEV Mexican strain were anti-HEV IgM positive during week 1--6 and anti-HEV IgG positive during week 2--76 determined by the one step ELISA. However, import ELISA kits were lack of both the IgM and lgG reactivity to all of the serial chimpanzee sera. Conclusions The sensitivity and specificity of anti-HEV ELISA one-step assay based on the Mix166 antigen are high and could be used for the diagnosis of HEV infection.

OBJECTIVE: To explore the mechanisms of the beneficial effects of Dahuang Zhechong Pill (DHZCP), a Chinese patent herbal medicine, in treatment of chronic renal disease, and to investigate the effects of DHZCP on the expressions of renal tissue inhibitor of metalloproteinase-1 (TIMP-1) and plasminogen activator inhibitor-1 (PAI-1) mRNAs in rats with adriamycin-induced glomerulosclerosis. METHODS: Focal segmental glomerulosclerosis and diffuse mesangial proliferation were induced in rats by combined procedures, including unilateral nephrectomy, intravenous injection of adriamycin and giving high-fat foods. The rats were randomly divided into untreated group, benazepril-treated group and DHZCP-treated group. Another 6 rats were sham-operated as control group. After 12-week treatment, rats were sacrificed, reverse transcription polymerase chain reaction (RT-PCR) method and computerized image analytical technique were used to determine the expressions of TIMP-1 and PAI-1 mRNAs. RESULTS: Compared with the untreated group, the ratios of TIMP-1/beta-actin and PAI-1/beta-actin of the DHZCP-treated group were decreased, suggesting that DHZCP could down-regulate the expressions of TIMP-1 and PAI-1 mRNAs (P<0.05). Benazepril could significantly inhibit the expression of TIMP-1 mRNA compared with that of the untreated group (P<0.05) CONCLUSION: DHZCP can down-regulate the expressions of TIMP-1 and PAI-1 mRNAs in renal tissues of rats with focal segmental glomerulosclerosis and diffuse mesangial proliferation, which may be its action mechanism in treating chronic renal disease.

OBJECTIVE: To observe the effects of Jianpi Yishen Recipe (JPYSR), a compound Chinese herbal medicine, on recurrence, metastasis and life span of mice transplanted with proventriculus squamous carcinoma cells after tumorectomy. METHODS: JPYSR was orally administered to 615 mice transplanted with proventriculus squamous carcinoma cells in the palma of left hind limb after tumorectomy. The local tumor recurrence, lung metastasis and life span of the mice were evaluated and compared with those of the 5-FU-treated mice and untreated mice. RESULTS: The pulmonary metastasis rate was 94.4% and the recurrence rate was 94.44% in untreated group. The pulmonary metastasis rate was 68.4%, the inhibition rate of pulmonary metastasis was 27.5%, the recurrence rate was 78.95%, and the inhibition rate of tumor recurrence was 65.35% in JPYSR-treated group. The average and median life spans were obviously prolonged in JPYSR-treated group, as compared with those in untreated group. The life-prolonging rate was 100%. CONCLUSION: JPYSR can effectively inhibit the local recurrence and pulmonary metastasis of the transplanted proventriculus squamous carcinoma in mice after tumorectomy, and prolong the life span.