Objective To investigate the effect of Hyaluronic acid(HA) on the expression of matrix metalloproteinases(MMPs)-3,9,13 and tissue inhibitor of MMPs(TIMP)-1 mRNA stimulated by interleukin (IL)-1β in chondrocytes from arthritis model in vitro.Methods Different levels of Sodium Hyaluronate(10,20,40μg/ml)were added to culture medium of rat chondrocytes.The ehondrocytes were isolated from rat osteoarthritis model.One hour later,10 ng/ml IL-1β were added to each sample and co-cultured for 24 hours.The expressions of MMP-3,9,13 and TIMP-1 mRNA were detected bv RT-PCR.The concentration of nitric oxide (NO) in the supernatants were measured by Griess reaction.Results HA could down-regulate MMP-3,9,13 mRNA expression but had no effect on TIMP-1 mRNA expression.Moreover,it also had a dose-dependent down regulate effect on nitric oxide synthesis.Conclusion This study demonstrates that HA can down-regulate the TIMP-1/MMPs expression by inhibiting NO production.

Objective To investigate the effect of hyperbaric oxygen (HBO) on expression of GAP 43 in the rats spinal cord following spinal cord injury (SCI). Methods Fifty five Wistar rats were randomly divided into three groups: a normal group, a control group and a HBO treatment group. The rats in the control and HBO treatment group underwent SCI by 10g?5cm impact at the T10 level. The rats in the HBO treatment group were treated by HBO. Western blot was used to observe the change of expression of GAP 43. Results There was weak expression of GAP 43 in the normal spinal cord. The GAP 43 expression increased significantly following SCI. The level of GAP 43 expression in the HBO treatment group was significantly high than that in the control group. Conclusion HBO can increase the level of GAP 43 expression.

BACKGROUND:Curcumin is proved to possess anti-inflammatory, antioxidant and anti-apoptotic roles. OBJECTIVE: To summarize and discuss the mechanisms and effects of curcumin used for the treatment of osteoarthritis METHODS: PubMed, Embase, Elseveir databases were retrieved for relevant articles published from 1973 to 2014, with the key words of “osteoarthritis, curcumin, chondrocyte, articular cartilage” in English. After the quality of the included studies was evaluated, valid data were extracted and analyzed. RESULTS AND CONCLUSION:Curcumin prevents the occurrence and development osteoarthritis by inhibiting oxidative enzyme and scavenging free radicals. Curcumin increases production of colagen type 2 through suppressing the reduction of cartilage matrix by matrix metaloproteinases. Anti-inflammatory reaction of curcumin can be achieved by inhibiting cytosolic phospholipase A2, cyclooxygenase-2, and 5-lipoxygenase. Curcumin inhibits interleukin-1β-induced apoptosis of chondrocytes and mitochondrial sweling. Results from clinical trials suggest that curcumin or its derivatives can reduce joint pain and improve the function of knee joints in patients with osteoarthritis. High-concentration curcuminin vitro have been demonstrated toxic effects.

Ovarian pregnancy is a rare ectopic pregnancy.In recent years,the development and popularization of assisted reproductive technology increase the incidence of ovarian pregnancy.This article focused on the ultrasound features of ovarian pregnancy following in vitro fertilization and embryo transfer (IVF-ET) by comparing those of pregnant corpus luteum and tubal pregnancy,and analyzed the advantages of transabdominal ultrasonography (TAS) and transvaginal ultrasonography (TVS) in the diagnosis.

Objective:To measure the expression of the MCP-1(Monocyte Chemoattractant Protein-1) in the serum of patients with acute spinal cord injury and explore the possible mechanism of secondary spinal cord injury.Methods:MCP-1 in the serum of patients with acute spinal cord injury,single spine compression and healthy subjects were detected by ELISA irrespectively.The MRI data of these patients were studied at the same time on a blind base.Results:MCP-1 in the serum of patients with acute spinal cord injury was correlated positively with the degree of spinal cord compression,which was elevated markedly(P

ObjectiveTo investigate the effects of carboxymethyl-chitosan(CMCS) on chondrocyte apoptosis induced by sodium nitroprusside (SNP),and the effects of CD44 in the process.MethodsA small interference RNA (siRNA) targeting to CD44 mRNA (siRNA-1,siRNA-2,siRNA-3) was constructed.The siRNA was transfected into chondrocytes in vitro with LipofectamineTM 2000.The efficacy of transfection was detected by transfecting fluorescence siRNA into cells.The mRNA expression of CD44 in vitro was detected by RT-PCR.The protein level of CD44 was detected by Western blotting.The apoptosis rate of the transfected and non-transfected cells induced by SNP was detected by flow cytometry.Statistical analysis was conducted with one-way ANOVA and SNK-q test.ResultsThe efficacy of transfection was about 60％.As compared with the control group,the mRNA expression was specifically inhibited after transfecting CD44 siRNA-1 for 24,48 and 72 h(0.198±0.007 vs 0.429±0.053 at 24 h,0.211±0.016 vs 0.501±0.037 at 48 h,0.153±0.005 vs 0.341±0.009 at 72h,q=5.93,7.01,11.23,P＜0.01 ),and the protein level of cells was inhibited after transfecting CD44 siRNA-1 for 24 h compared with the control group (0.231±0.064 vs 0.675±0.113,q=13.09,P＜0.01 ).The FCM results showed that 3 mmol/L SNP could induce chondrocytes apoptosis(70±6)％,and 50,100,200 μg/ml C MCS could affect the inhibitory effect of SNP-induced apoptosis of chondrocyte [ (51 ±7)％,(30±4)％,(15±4)％,q=5.08,6.97,9.73,P＜0.01 ],but it had milder inhibitory effect on CD44-siRNA-1 transfected chondrocytes when compared with those of the non-transfected chondrocytes [ (34±6)％ vs(15±4)％,q=6.95,P＜0.01 ].ConclusionThe data of this study has suggest that siRNA-1 against CD44 gene can significantly inhibit the expression of CD44 in chondrocyte of rats in vitro after transfection.The CD44 may play an important role in chondrocyte apoptosis induced by SNP and protected by CMCS.

Objective To explore the effect of high-fat diet on IRS-1 and IRS-2 expressions of fatty liver in rat. Methods After the rats were fed a high-fat diet (n=7) and a standard chow(n=7) for 8 weeks, insulin sensitivity,lipid metabolism, TNF-α and hepatic mRNA and protein expressions of IRS-1 and IRS-2 were measured. Results Compared with the normal control, the high-fat diet group displayed the elevated levels of insulin resistance,FFA and TNF-α.Hepatic IRS-1 mRNA expression and IRS-1 protein content were reduced by 28% and 32%(P<0.01),respectively. Similarly, hepatic IRS-2 mRNA and IRS-2 protein content were also reduced by 30% and 27% (P<0.01), respectively. Conclusions High-fat diet results in a significant decrease in expressions of mRNA and protein of hepatic IRS-1 and IRS-2 in rats, which might be one of the molecular mechanisms of insulin resistance in liver steatosis induced by high-fat diet

Objective To investigate the way of resection of high-sacrum tumors and the reconstruction way of the sacrum. Methods From October 2001 to October 2005,7 patients with high-sacrum tumors were enrolled. After resection, the pelviclring were recormtmcted with Chinese Great Wall pedicle screw system and fibulae graft,corresponding chemotherapy and radiotherapy were given after operation. Results The short-term results were satisfactory with the lumbosacral pain reduced and the neurological function improved in different degrees, however dysuria occurred in 1 ease and 1 case cerebrospinal fluid leakageand 1 case postoperative infection and delayedunion among the 7 eases in this group. In the follow-up period of 6 months to 3 years,4 eases died for tumor recurred or metastasis. Conclusions Surgical procedure,reconstruction of the sacrum and postoperative comprehensive treatment have important effects on the prognosis. Meanwhile,it is operative key to lessen operative hemorrhage,reserve the function of caudal equine and rebuild weight high post function of the pelvis after superior sacrum tumor is removed.

BACKGROUND:Pathogenesis of osteoarthritis is poorly understood,however,studies have demonstrated that vascular endothelial growth factor(VEGF)Is involved in the progression of osteoarthritis.OBJECTIVE:To detect the changes of VEGF mRNA expression of synovium in rabbit osteoarthritis and to evaluate the effect of sodium hyaluronate on its expression.METHODS:Twenty four white rabbits were divided into the normal control,physiologic saline,and sodium hyaluronate groups.The unilateral anterior cruciate ligament transection(ACLT)was performed in the physiologic saline and sodium hyaluronate groups.At weeks 4 after operation,rabbits in the physiologic saline group were injected 0.3 mL physiologic saline and in the sodium hyaluronate group received 10 g/L sodium hyaluronate injection,once per week for 5 successive weeks.All the animals were sacrificed at week 10 after operation.The cartilage changes on the medial femoral condyles were graded separately VEGF express Jon of synovium was detected by using teal time polymerase chain reaction(RT-PCR).RESULTS AND CONCLUSION:The macroscopic score showed that the cartilage degeneration in the physiologic sailne group was significantly more severe than that of the normal control and sodium hyaluronate groups(P＜0 05)The expression of VEGF mRNA was obviously decreased in the physiologic saline group than that of the normal control group(P＜0 05).of which was increased in thesodium hyaluronate group,but still smaller than the normal control group(P＜0 05).The results demonstrated that the decreased VEGF expression in synovium may involved in the progression of osteoarthritis,and sodium hyaluronate has protective effect on articular cartilage by up-regulating the VEGF expression.

[Objective] To investigate the effects of pyrroloquinoline quinine (PQQ) on proliferation and expression of NF - kB of Schwann cells. [Methods] Schwann cells were cultured from sciatic nerves of SD rats in vitro. The Schwann cells were identified and purified by immunofluorescence of S-100 and Ara-C. Experimental group with was 100 nmol/L of PQQ and control group were set up. The expression of NF-kB in Schwann cells was determined by RT-PCR and Western blotting. [ Results] The expression of NF - kB were up - ragulated by PQQ in cultured Schwann cells (P<0.05).[Conclusion ] PQQ could promote the proliferation of Schwann cells and up-regulation of NF-rd3 play an important role in this process.