Objective To analyze the cause of lower limbs swelling after knee arthroscopy operation, and compare the effect of gravity and pump irrigation system on lower limbs swelling after operation. Methods 60 patients after knee arthroscopic surgery were divided into the pump irrigation group and the gravity group with 30 patients in each group. We measured the perimeter of the lower limb pre and post operation and compared the operation time of each group. Results There were no significant differences in the perimeter of the lower limb and operation time between the gravity group and the pump irrigation group. Conclusions During knee arthroscopic surgery which cost less than 1 hour, there was no inlluence on lower limbs swelling whether using gravity or pump irrigation system.

Hypertension is a global problem,affecting both developed and developing nations. The mor-bidity of hypertension in children and adolescents has increased year by year in recent years. Hypertension in children can cause target organ damages(mainly renal,cardiovascular,central neurological,or optic fundal). In clinical practice,we need to find simple and easy methods for early recognition of target organ damages,thus se-rious consequences in adult hypertension may be prevented.

BACKGROUND: Mesenchymal stem cells (MSCs) from adult bone marrow can alter alloimmune response in vitro and vivo. Their potentiality is great in solid organ transplantation.OBJECTIVE: To develop MSC antirejection therapy and identify behind mechanishm of MSCs immunomodulation ability. METHODS: We searched Pubmed (1994-Mar.2009) with the key words of "mesenchymal stem cells, solid organ transplantation, tolerance, immunosuppression, animal model". RESULTS AND CONCLUSION: Totally 262 English articles about influence and mechanism of action of adult bone marrow mesenchymal stem cells on solid organ transplantation were collected. The 49 suitable articles were included without earlier publication time, repeated and analogous study. Human mesenchymal stem cells did not express MHC2 Ⅱ antigen and T cell costimulatory molecules B7. Coculture with allogenic T lymphocytes could not induce T cell proliferation, but inhibited mixed lymphocyte reaction and mitogenstimulated T cell proliferation. Inhibitory effects of mesenchymal stem cells on T cell proliferation were not limited by major histocompatibility complex. Mesenchymal stem cells no matter from donors or recipients had similar immunoloregulation effects. Allogene mesenchymal stem cells could cause immunereaction in vivo, no complete immune privilege. The in vivo effects of mesenchymal stem cells will strongly depend on their localization and migration pattern after injection. Therefore, MSCs are interesting candidate cells for tolerance induction in clinical organ transplantation.

Objective To observe the bleeding risk of short-term intensive statin therapy after coronary artery bypass grafting. Methods A total of 240 patients treated with coronary artery bypass grafting were randomly divided into group A(experimental group)and group B(control group). All pa-tients were normalized to conventional treatment and they were given low molecular weight heparin for an-ticoagulant therapy during the perioperative period. Patients in group A were given 40 mg of atorvastatin before surgery,and 40 mg of atorvastatin every night for one month after the surgery. Patients in group B were given 10 mg of atorvastatin every night during the treatment. One month after the operation,platelet aggregation rate and bleeding events of patients were compared. Results There were significant differ-ences in maximum platelet aggregation rate[(14. 5 ± 3. 7)% vs(38. 1 ± 7. 4)% ,P < 0. 05],inhibition rate of platelet aggregation[(79. 5 ± 4. 3)% vs(50. 8 ± 10. 2)% ,P < 0. 05],and incidence of postopera-tive bleeding[27. 5% vs 12. 5% ,P < 0. 05]between group A and B,respectively. Conclusion Short-term intensive statin therapy can increase the bleeding risk after coronary artery bypass grafting.

Objective To investigate the dissolution rates of glibenclamide and metformin in compound metformin hydrochloride. Methods The concentrations of the glibenclamide and metformin were determined by HPLC method. The rotating basket method was used to measure and compare the dissolution rates of glibenclamide and metformin between the compound metformin hydrochloride and conventional tablets. Results The dissolution rates of glibenclamide and metformin with different preparation came up to the standard of CHP (2005), but the dissolution parameters were different. Conclusion The dissolution rate of glibenclamide indicated significant difference between the compound metformin hydrochloride and the conventional tablets, and no significant difference for metformin.

Objective: To observe the impact of vascular calcification on kidney injury rats with the expressions of β-Klotho, fibroblast growth factor receptor 1 (FGFR1) in kidney tissue in order to find the predictor for early chronic kidney disease (CKD), to provide the prevention and investigation basis of vascular calcification and CKD. Methods: Vascular calcification model was induced by vitamin D3 and nicotine injection in experimental rats and the animals were divided into 2 groups: Normal control group and Calcification group. n=6 in each group. Serum levels of creatinine and urea nitrogen were examined by sarcosine oxidase method and UV-glutamate dehydrogenase method respectively; blood levels of calcium and phosphorus were detected by biochemistry method; kidney tissue alkaline phosphatases (ALP) activity was measured by ALP detection kit, protein expressions of β-Klotho and FGFR1 were assessed by ELISA.Results: Compared with Normal control group, Calcification group showed increased serum levels of creatinine (35.200±4.087) umol/L vs (26.000±5.0990) umol/L and urea nitrogen (6.900±0.623) mmol/L vs (5.400±0.803) mmol/L, both P<0.05; elevated kidney tissue ALP activity (60.510±31.090) U/g vs (26.590±8.664) U/g and β-Klotho protein expression (9.052±1.238) ng/mg vs (6.860±1.036) ng/mg, both P<0.05. Blood levels of calcium, phosphorus and kidney tissue FGFR1 protein content were similar between 2 groups. Conclusion: Large dose vitamin D3 and nicotine injection may induce vascular calcification and early CKD symptom in experimental rats; β-Klotho protein expression was significantly increased suggesting that β-Klotho had been involved in the early regulation of vascular calcification and it could be used for the early diagnosis of CKD at certain point.

BACKGROUND: Anterior cruciate ligament (ACL) is the kernel of articular genu, for the past few years, the incidence rate of cruciate ligament injury increased gradually.OBJECTIVE: To review on the mechanism of the injury of ACL, the method of operation, the election of transplant, the reconstruction of equilong, the reconstruction of ligament and so on, and to look forward to providing some references on treating the ACL injury.METHODS: A computer-based research was conducted in Medine database (1996-01/2009-03), with the key words of "Anterior cruciate ligament, implant, reconstruction, repair". Chongqing VIP database and Qinghua Tongfang database (1996-01/2009-03) were retrieved with the same key words.RESULTS AND CONCLUSIONS: 200 literatures on arthroscopic ACL reconstruction were collected, excluding older, repeated and similar research, and the 18 standard literatures were included. ACL is a key structure to stabilize knee joint, and exercises and various factors during daily life could induce its injury. Unsuitable treatment would severely affect movement ability or movement loss. To recover structure and function of knee joint, damaged ACL should be reconstructed. With the development of technique and innovation of surgical instrument, arthroscopic reconstruction has presently been a popular method to treat ACL. There are many methods to treat ACL injury, but none of them can duplicate ACL anatomical relationship. It is still in doubt whether the operation can reduce the secondary damage. We have much more work to research on modus operandi, implant, postoperative rehabilitation and other adjunctive therapies.

Autoimmune polyendocrinopathy syndrome type Ⅰ( APS-Ⅰ) is a rare autosomal recessive disorder caused by mutations in autoimmune regulator gene( AIRE) . A number of mutations have been described in the AIRE gene of patients with APS-Ⅰ, including nonsense mutation, missense mutation, silent mutation, splice site mutation, insertions and deletions mutation, et al. The mutation characteristics of the APS-Ⅰ pathogenic gene have been reviewed in the article.

Objective To investigate the diagnostic value of serum amyloid A(SAA)in diagnosing acute exacerbations of chronic obstructive pulmonary disease(AECOPD).Methods A total of 86 patients with AECOPD and 46 patients with stable COPD were recruited.SAA determined with ELISA was compared between AECOPD patients and stable COPD patients.The changes of SAA,WBC,the percentage of neutrophils and C-reactive protein (CRP) of AECOPD patients Was compared before and immediately after the last treatment procedure.Results The SAA levels in AECOPD patients were higher than those in stable COPD patients [(182.33±50.12)mg/L vs (6.24±3.05)mg/L,P<0.05].The change of SAA was more evident than that of serum WBC and the percentage of neutrophils before and after the treatment procedure. SAA was more sensitive than CRP in diagnosing lung function severity of AECOPD patients.Conclusion SAA has great diagnostic value in AECOPD diagnosis and evaluation of lung function severity.

Mesenchymal stem cells (MSCs) have been the hot spot of rehabilitation and tissue engineered medicine.Due to their origination from the adult tissues,the multilineage differentiation potential and immune escape characteristics,MSCs become the ideal seed cells for cell transplant treatment.This article summarizes the biological characteristics of MSCs and its application in the treatment of liver disease.