Objectives To investigate the expression features and roles of the costimulatory molecules and T lymphocyte subsets from patients with chronic nephritis.Methods The expression of the costimulatory molecules CD 28 and CD 137 on PBMC (peripheral blood mononuclear cells) and T lymphocyte subsets from 52 patients with chronic nephritis were studied by immunophenotyping and flow cytometry analysis.Results The T lymphocyte subsets from patients with chronic nephritis showed an obvious imbalance with reversing CD 4/CD 8 ratio,decreasing CD + 4T cells and increasing CD + 8T cells.The expression of the costimulatory molecule CD 28 on T cells was significantly lower compared with normal controls (P

Objective To review the results of limb lengthening over an intramedullary nail in management of femoral defect and length discrepancy.Methods Femoral lengthening over an antegrade intramedullary nail was applied to treat length discrepancy of 4 to 7 cm for three cases,and femoral defects of 8 and 11 cm respectively for two cases from January 2001 to December 2003.The nail and an external fixator(Ilizarov external fixator for bone defect and Orthofix limb-reconstruction system for discrepancy)were applied concomitantly at the time of femoral osteotomy.After a mean fixation time of 16.2 days(13 to 24 days),gradual distraction began at a rate of 0.25 millimeter four times a day.When the managed femur reached the expected length,the nail was locked and the fixator was removed in patients with length discrepancy.The procedure was not finished in patients with bone defects until bony consolidation was partially seen.Results All the patients were followed up for a mean time of 36.4 months(range,22 to 47 months).The mean gain in length was 7.2 cm(range,4 to 10 cm)with good consoli- dation,the mean duration of external fixation was 5 months(range,3 to 8 months),and the mean external fixation index was 0.75 month per centimeter(range,0.57 to 1.00 month per centimeter).Neither axial deviation nor re-fracture occurred.At the last follow-up,the mean range of movement of knee was 107?(80?to 135?).Con- clusions In management of defect and length discrepancy of limbs,lengthening over an intramedullary nail has the advantages of short duration of external fixation,good protection against refracture,and earlier rehabilitation of knee joint,as well as disadvantages of long operation time,massive intraoperative bleeding,high cost and much post- operative scarring.

Objective:To investigate the role of Smad7 in the Hepatocellular carcinoma (HCC) migration and proliferation and its clinical significance.Methods:Through transfecting pcDNA3.1 (+)-Smad7 or siRNA Smad7 to overexpress or knockdown the Smad7 expression in HCC cell lines HepG2 and Huh7.The MTT assays were used to test the role of Smad7 in proliferation of HCC cells.Transwell and wound-healing assays were used to detect the effect of Smad7 on migratory ability in both tow cell lines.RT-PCR was used to test the Smad7 expression in 9 clinical HCC patients' specimens.Results:As the results,overexpression of Smad7 significantly inhibited the proliferation of cells compared with the control group,while knockdown Smad7 promoted the proliferation.At the same time,overexpression of Smad7 could inhibit the migratory ability of HCC cells compared with the control group,while knockdown smad7 could accelerate this ability.The expression of Smad7 in cancer tissue was significantly lower compared with normal mucosa tissue adjacent to cancer.Conclusions:Smad7 is a kind of anti-progressive molecule in HCC.

Objective To investigate the effects of different doses rosuvastatin on carotid vulnerable plaques and cerebral ischemic events in patients with transient ischemic attack (TIA).Methods The TIA patients with carotid vulnerable plaques were enrolled retrospectively.They were randomly divided into either a rosuvastatin conventional dose group or a high-dose group.On the basis of conventional treatment,the former was also given rosuvastatin 10 mg/d,and on the basis of conventional treatment,the latter also took rosuvastatin 20 mg/d.The patients were followed up for 6 months.Blood lipid was detected before and after treatment.The carotid intima-media thickness (IMT),atherosclerotic plaque area,and Crouse plaque score were detected with cervical vascular ultrasound.The incidences of cerebral ischemic events were compared within six months after treatment.Results A total of 71 patients were enrolled.There were 35 patients in the conventional-dose group and 36 patients in the high-dose group.Two and one patients were lost to follow up respectively in both the conventional-dose group and the high-dose group.There were no significant differences in baseline total cholesterol (TC) (5.65 ± 1.05 mmol/L vs.5.46 ±0.87 mmol/L;t =0.812,P =0.419),triacylglycerol (TG) (2.85 ± 0.74 mmol/L vs.2.95 ± 0.86 mmol/L;t =0.513,P =0.609),low-density lipoprotein cholesterol (LDL-C) (4.11 ± 0.47 mmol/L vs.4.08 ± 0.33 mmol/L;t =0.304,P =0.761),and high-density lipoprotein cholesterol (HDL-C) (1.27 ± 0.22 mmol/Lvs.1.23 ± 0.20 mmol/L;t =1.339,P =0.185) between the high-dose group and the conventional dose group.After treatment,TC (3.06±0.77 mmol/L vs.4.98 ±0.78 mmol/L;t=10.214,P＜0.001),TG (2.15±0.56 mmol/L vs.2.52 ± 0.68 mmol/L;t =2.492,P =0.015),and LDL-C (2.18 ± 0.59 mmol/L vs.3.86 ± 0.42 mmol/L;t =13.526,P＜0.001) in the high-dose group were significantly lower than those in the latter,while HDL-C (1.43 ±0.20 mmol/L vs.1.33 ± 0.21 mmol/L;t =2.010,P =0.048) was significantly higher than the conventional dose group.There were no significant differences in baseline IMT (1.59 ± 0.26 mm vs.1.58 ± 0.28 mm;t =0.152,P =0.879),plaque area (0.87 ± 0.29 mm2 vs.0.85 ± 0.34 mm2;t =0.261,P =0.749),and Crouse score (4.26 ± 0.31 mm vs.4.18 ± 0.25 mm;t =1.171,P =0.245) between the high-dose group and the conventional dose group;after treatment,IMT (1.26 ± 0.25 mm vs.1.44 ±0.27 mm;t =2.852,P=0.005),plaque area (0.50±0.25 mm2 vs.0.70±0.25 mm2;t=3.298,P=0.001),and Crouse score (2.30 ±0.26 mm vs.4.03 ±0.24 mm;t =28.509,P ＜0.001) in the high-dose group were significantly decreased compared with the conventional dose group.The incidence of cerebral ischemic events in the high-dose group was significantly lower than that in the conventional dose group (11.76％ vs.29.41％;x2 =3.202,P =0.001).Conclusions Rosuvastatin has significant lipid-lowering effect.It can eliminate or stabilize carotid vulnerable plaque and reduce ischemic stroke events.The effect of rosuvastatin 20 mg/d is superior to that of rosuvastatin 10 mg/d.

Female ; Fibrosarcoma ; diagnosis ; pathology ; Humans ; Magnetic Resonance Imaging ; Middle Aged ; Neoplasm Metastasis

BACKGROUND:Someone regards that treatments such as root canal therapy and post-core restoration can increase the fracture probability of teeth. Can fiber reinforced composite post enhance the fracture resistance of the severe wedge-shaped defected premolar? Three-dimensional finite element can simplify complex dental systems into a model analyzed by computer, and conduct biomechanical research through the model analysis. OBJECTIVE:To analyze the stress distribution of sever wedge-shaped defected first premolar which restored by fiber reinforced composite post and composite resin. METHODS:We established the three-dimensional finite element models of severe wedge-shaped defected maxil ary first premolar before and after restoration with fiber reinforced composite post and composite resin. The maximum bite force was designed to 267 N that was applied at 45° angle. Then, we analyzed the distribution of maximum principal stress in finite element models. RESULTS AND CONCLUSION:The maximum principal stress was concentrated in the tip of defected region. After restoration, the distribution of maximum principal stress was similar to that of the normal premolar, and the tensile stress was distributed uniformly in the upper-central part of buccal root. It may be beneficial for improving fracture resistance ability of severe wedge-shaped-defect premolar by restoration with fiber reinforced composite post and composite resin.

Objective To investigate the effect of aquaporin 5(AQP5)gene to the differentiation and development of bone marrow-deriued dendritic cells(BMDC).Methotis The DCs obtained from the bone marrow of the AQP5-/- and the wild type(WT)mice were cultured and induced to maturation by LPS.The phenotype of the two types DCs were assayed by FACS,and the phagocytosis ability Was assayed by co-incubating with FITC-conjucted ovalbumin.Results Contrast to the DCs from the WT mice,the DCs from the A9P5-/-mice showed reducing positive rate of expression of the co-stimulating molecular such as CD40,CD80.CD86.And the phagoeytosis ability of DCs from the AOP5-/-mice was lower than that of the WT mice.The relationship of the phagncytosis rate to the time from the AOP5-/- mice was different from that of the WT mice.The stimulating ability of the AOP5-/-DCs was lower than that of the WT mice.Conclusion Water transmembrane moving mediated by AQP5 iS very important to the normal function of DCs.The certain mechanism of the signal moleeular is to be determined. Aquaporin 5;Dendritic cell;Gene knockout;Co-stimulating molecular

Objective To investigate the value of contrast-enhanced ultrasound (CEUS) in differential diagnosis of pancreatic pseudocysts,cystadenomas and cystadenocarcinomas,so as to improve diagnostic accuracy of the condition.Methods The results of CEUS and conventional ultrasound for 71 patients with pancreatic cystic lesions were analyzed retrospectively,and compared with the finally obtained surgical-pathological examination to assess the ability of qualitative diagnosis between two methods.Results In 71 pancreatic cystic lesions,there were 32 pancreatic pseudocysts,24 cystadenomas and 15 cystadenocarcinomas.The sensitivity and accuracy of CEUS for pancreatic pseudocysts and cystadenocarcinomas were 84.4％,93.0％ and 86.7％,88.7％,which were higher than those of conventional ultrasound 56.3 ％,80.3 ％ and 53.3 ％,74.6％ (x2 =6.06,4.92,3.97,4.71,all P ＜ 0.05).Conclusion There are some similarities in terms of imaging manifestations among pancreatic pseudocysts,cystadenomas and cystadenocarcinomas.Combining conventional ultrasound with CEUS can help the differential diagnosis of pancreatic cystic lesions.

OBJECTIVE:To evaluate the efficacy of Probiotics in the treatment of ulcerative colitis(UC).METHODS:The recent pertinent literature about the use of Probiotics in the treatment of UC was retrieved from PubMed and Medline and the methodology and literature quality were evaluated in accordance with the evaluation criteria for the quality of literature of evidence-based medicine.RESULTS & CONCLUSION:The majority of the studies showed that Probiotics are of positive value for the remission of the US at acute stage and maintaining of remission induction of drugs in the treatment of UC.Strictly designed and randomized controlled trials(RCTs)remain to be done to tackle the problems encountered by the micro-ecological preparations as a new therapy in the treatment of UC.

Objective To evaluate the diagnostic value of MRI for meniscal bucket-hanle tears. Methods 21patients with bucket-handle tears and 11 patients without bucket-handle tears were put under MRI examinations with the dedicated MRI system(Artoscan 0.2T ESAOTE) and confirmed by arthroscopy.Each was accessed for the presence of (1) the double-anterior sign,(2)the double posterior cruciate ligament sign,(3)the fragment within the intercondylar notch sign and (4)the absent bow tie sign.Results Of 33 cases, the double-anterior sign were seen in 10 cases, the double posterior cruciate ligament sign were seen in 5 cases,the fragment within the intercondylar notch sign were seen in 20 cases and the absent bow tie sign were seen in 25 cases. Conclusion MRI plays an important role in the diagnosis of meniscal bucket-handle tears.The sensitivity and specificity of medial meniscal bucket-handle tears are higher than that of lateral meniscus. The fragment within the intercondylar notch sign is the most valuable sign in diagnosing meniscal bucket-handle tears.