OBJECTIVETo study the efficiency of decreasing instability of large femoral head components in revision total hip arthroplasty (THA).

METHODSFrom August 2005 to December 2010, 107 patients (112 hips) with 28 mm femoral head components (28 mm group) and 46 patients (46 hips) with 36 mm femoral head components (36 mm group) in revision THA were analyzed retrospectively in order to find if the dislocation rate and Harris hip score were different between the two groups at the time of last follow-up. All the operations were performed by the first author. There were 81 male patients (85 hips) and 26 female patients (27 hips) in 28 mm group with mean age of (62±17) years (26-79 years) and 33 male patients (33 hips) and 13 female patients (13 hips) in 36 mm group with mean age of (60±16) years (31-77 years).

RESULTSThe mean follow-up period was 43.3 months (33-71 months) for 28 mm group and 26.7 months (12-37 months) for 36 mm group. There were 7 patients dislocated after revision in 28 mm group, including 2 revised with reinforcement rings (with dislocation rate 9.5%), 3 revised with impaction bone grafting technique (with dislocation rate 8.3%) and 2 revised with cementless cups (with a dislocation rate 3.6%). The dislocation rate of this group was 6.2%. While the dislocation rate of 36 mm group was 2.2%, the only dislocated patient was because of loss of gluteus medius muscle function in the index operation. If this case was excluded, the dislocation rate of 36 mm group would be 0. There was significant difference between the two groups (χ2=103.0095, P<0.01). The Harris hip score was 88±11 for 28 mm group and 89±9 for 36 mm group, there was no significant difference between the two groups (P>0.05).

CONCLUSIONThe large femoral head components can significantly decrease the instability after revision THA, which should be used in revision THA.

Adult ; Aged ; Arthroplasty, Replacement, Hip ; instrumentation ; Female ; Follow-Up Studies ; Hip Prosthesis ; Humans ; Male ; Middle Aged ; Prosthesis Failure ; Retrospective Studies

This paper presents a remote controlled multimode micro-stimulator based on the chip nRF24E1, which consists mainly of a micro-control unit (MCU) and a radio frequency (RF) transceiver. This micro-stimulator is very compact (18 mmx28 mm two layer printed circuit board) and light (5 g without battery), and can be carried on the back of a small animal to generate electrical stimuli according to the commands sent from a PC 10 meters away. The performance and effectiveness of the micro-stimulator were validated by in vitro experiments on the sciatic nerve (SN) of the frog, where action potentials (APs) as well as artifacts were observed when the SN was stimulated by the micro-stimulator. It was also shown by in vivo behavioral experiments on operant conditioned reflexes in rats which can be trained to obey auditory instruction cues by turning right or left to receive electrical stimulation ('virtual' reward) of the medial forebrain bundle (MFB) in a maze. The correct response for the rats to obey the instructions increased by three times and reached 93.5% in an average of 5 d. This micro-stimulator can not only be used for training small animals to become an 'animal robot', but also provide a new platform for behavioral and neurophysiological experiments.
Acoustic Stimulation ; Animals ; Behavior Control ; methods ; Conditioning, Operant ; physiology ; Electric Stimulation ; instrumentation ; Equipment Design ; Male ; Medial Forebrain Bundle ; physiology ; Movement ; Rats ; Rats, Sprague-Dawley ; Remote Sensing Technology ; Robotics

OBJECTIVETo compare the difference of anterior knee pain after total knee arthroplasty (TKA) between the ways using periosteal dissector and electric scalpel to release medial collateral ligament and pes anserinus.

METHODSFrom September 2009 to September 2012, 220 patients with unilateral osteoarthritis were treated with primary TKA in hospital 301. All the patients were randomly divided into periosteal dissector group (110 cases) or electric scalpel group (110 cases). In the periosteal dissector group, there were 47 males and 63 females,with an average age of (58.8 +/- 17.2) years old; the degree of genuavarus was (14.0 +/- 3.5) degrees; the weight was (65.6 +/- 12.8) kg; the body mass index (BMI) was (26.6 +/- 3.6) kg/m2. In the electric scalpel group,there were 49 males and 61 females,with an average age of (59.6 +/- 16.7) years old;the degree of genuavarus was (15.0 +/- 4.7) degrees; the weight was (66.4 +/- 13.4) kg; the BMI was (27.4 +/- 4.1) kg/m2. The mean follow-up period was 24.6 months. The AKS, VAS and HSS were used to evaluate clinical results.

RESULTSAll incisions healed at the first stage;no deep vein thrombosis of lower limbs or pulmonary embolism occurred. Knee infection occurred in 3 cases (1 in the periosteal dissector group and 2 in the electric scalpel group), and the 3 patients received stage 2 total knee revision using antibiotic bone cement and TC3 prosthesis. No recurrence of infection occurred during follow-up. Among the 20 patients who had anterior knee pain, 16 patients were in the periosteal dissector group and 4 patients were in the electric scalpel group. The occurrence rate of anterior knee pain in the electric scalpel group was lower than that in the periosteal dissector group. The AKS knee score and HSS score after total knee arthroplasty in the electric scalpel group were all higher than those in the periosteal dissector group, and the VAS in electric scalpel group was lower than that of periosteal dossector group.

CONCLUSIONCompared with using electric scalpel,using periosteal dissector used to release medial collateral ligament and pes anserinus may cause more anterior knee pain after total knee arthroplasty.

Adult ; Aged ; Arthroplasty, Replacement, Knee ; adverse effects ; Case-Control Studies ; Female ; Humans ; Knee Joint ; surgery ; Male ; Middle Aged ; Pain, Postoperative ; etiology ; Tibia ; pathology ; Treatment Outcome ; Young Adult

BACKGROUNDHistone deacetylase (HDAC) inhibitors are a group of small chemical molecules that inhibit histone deacetylase. At cell level, HDAC inhibitors have multiple biological effects such as cell cycle arrest, apoptosis, cell differentiation and auotophagy. At molecular level, HDAC inhibitors cause histone and nonhistone acetylation and induce gene expression. HDAC inhibitors are widely used in cancer therapy because of its function of inducing apoptosis. However, the mechanisms of apoptosis effect are not fully understood. TSA is a classical HDAC inhibitor and widely used in epigenetic and anti-cancer research. In this study, we selected Trichostatin A (TSA) to investigate the mechanisms of HDAC inhibitors apoptotic effect on cancer cells.

METHODSCervical cancer cell lines such as Hela, Caski and normal human keratinocyte line HaCaT were treated with various concentrations of TSA. Crystal violent assay and 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay were performed to determine cell number. PARP cleavage and FITC-AnexinV were performed to determine apoptosis. DNA-methyltransferase (DNMT)1, DNMT3A and DNMT3B were determined by regular PCR, qPCR and Western Blotting. Small interfering RNA (SiRNAi) was used to knock down DNMT3B.

RESULTSHDAC inhibitors only induce cervical cancer cell apoptosis. At 1 µmol/L of TSA, 86% of Hela cell and 76% of Caski went apoptosis. For normal cells, HDAC inhibitors have no cytotoxic effect at therapeutic dosage, (90.0 ± 8.4)% of normal cell survive after treated with 1 µmol/L of TSA. We compared 1 µmol/L group with untreated control with t-test. There was no significance between 1 µmol/L group and untreated control for normal cell (P > 0.05). HDAC inhibitors decreased DNMT3B in cancer cell but not in normal cell. Manually knock-down of DNMT3B induced Hela and Caski cell apoptosis. More than 99% of Hela and Caski cell went apoptosis after deprived of DNMT3B.

CONCLUSIONSDNMT3B was essential to cervical cancer cell survival. Down-regulated DNMT3B by HDAC inhibitors may play an important role in the toxicity of HDAC inhibitors on cervical cancer cells.

Apoptosis ; drug effects ; genetics ; Cell Line ; Cell Line, Tumor ; DNA (Cytosine-5-)-Methyltransferases ; genetics ; metabolism ; Female ; HeLa Cells ; Histone Deacetylase Inhibitors ; pharmacology ; Humans ; Hydroxamic Acids ; pharmacology ; Uterine Cervical Neoplasms ; enzymology ; genetics

This study aimed to identify the differentially expressed genes after silencing of β-catenin in multiple myeloma transduced with β-catenin shRNA. The DNA microarray dataset GSE17385 was downloaded from Gene Expression Omnibus, including 3 samples of MM1.S (human multiple myeloma cell lines) cells transduced with control shRNA and 3 samples of MM1.S cells transduced with β-catenin shRNA. Then the differentially expressed genes (DEGs) were screened by using Limma. Their underlying functions were analyzed by employing Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathway enrichment analyses. Moreover, DEGs annotation was conducted based on the databases of tumor associated genes, tumor suppressed genes and the transcriptional regulation from patterns to profiles. Furthermore, the protein-protein interaction (PPI) relationship was obtained from STRING and the protein-protein interaction network and the functional modules were visualized by Cytoscape. Then, the pathway enrichment for the DEGs in the functional module was performed. A total of 301 DEGs, including 124 up-regulated and 117 down-regulated DEGs, were screened. Functional enrichment showed that CCNB1 and CDK1 were significantly related to the function of cell proliferation. FOS and JUN were related to innate immune response-activating signal transduction. Pathway enrichment analysis indicated that CCNB1 and CDK1 were most significantly enriched in the pathway of cell cycle. Besides, FOS and JUN were significantly enriched in the Toll-like receptor signaling pathway. FOXM1 was identified as a transcription factor. Moreover, there existed interactions among CCNB1, FOXM1 and CDK1 in PPI network. The expression of FOS, JUN, CCNB1, FOXM1 and CDK1 may be affected by β-catenin in multiple myeloma.
CDC2 Protein Kinase ; Cyclin B1 ; genetics ; Cyclin-Dependent Kinases ; genetics ; Forkhead Box Protein M1 ; Forkhead Transcription Factors ; genetics ; Gene Expression Profiling ; methods ; Gene Expression Regulation, Neoplastic ; Gene Regulatory Networks ; Gene Silencing ; Humans ; Multiple Myeloma ; genetics ; Oncogene Proteins v-fos ; genetics ; Protein Interaction Maps ; Proto-Oncogene Proteins c-jun ; genetics ; beta Catenin ; genetics

OBJECTIVETo compare the clinical outcomes of single level Bryan cervical disc replacement with traditional anterior cervical discectomy and fusion (ACDF).

METHODSFrom Dec 2003 to May 2005, 59 patients with primary, single-level cervical radiculopathy and/or myelopathy were prospectively randomized into 2 groups: Bryan group with artificial disc replacement and ACDF group with traditional anterior cervical discectomy and fusion. Operation time, blood loss and hospitalization duration were compared between the 2 groups. Follow-up was taken at six weeks, 3, 6, 12 and 24 months after operation, and each case in both groups was evaluated with serial radiographic studies, neck disability indices (NDI), visual analog scale scores (VAS) for arm and neck pain.

RESULTSNo difference was found in the operation time, intraoperative blood loss and hospital stay between the 2 groups. But at the follow-up of 6 weeks and 3 months after operation, significant difference in NDI and VAS of neck pain existed. All replaced segments remained normal range of motion in sagittal rotation, while no motion occurred in any of the fusion segments. In ACDF group movement of the whole cervical spine decreased but gradually recovered to preoperative level in 6 months after operation. In Bryan group, pre- and postoperative motion of the whole cervical spine remained unchanged at any of the follow-up time.

CONCLUSIONSBryan disc replacement can achieve similar clinical improvement compared with traditional ACDF. Arthroplasty has the advantages of motion maintenance for the cervical spine and short recovery time after operation.

Adult ; Arthroplasty, Replacement ; Cervical Vertebrae ; surgery ; Female ; Follow-Up Studies ; Humans ; Intervertebral Disc ; surgery ; Joint Prosthesis ; Male ; Middle Aged ; Prospective Studies ; Spinal Osteophytosis ; surgery ; Treatment Outcome

This study evaluated the clinical effect of impaction bone graft and distal press-fit fixation for the reconstruction of severe femoral bone defect in revision total hip arthroplasty. A total of 234 patients (involving 236 hips) with Paprosky III and IV femoral bone defects were treated with the revision total hip arthroplasty from June 1998 to Aug. 2006. Impaction bone graft technique was used for 112 hips, with allogeneic freeze-dried bone as bone graft and SPII as prosthesis. With 124 hips, modular distal press-fit fixation and tapered femoral stem (MP stem) were employed. After the operation, the subjects were followed up on regular basis and results were assessed by using the Harris Hip Score (HHS) and 12-item Short Form Health Survey (SF-12). Radiolucence, subsidence and loosening were observed and complications, including infection, fracture, dislocation etc. were recorded. A 6-14-year follow-up showed that prostheses failed, due to infection, in 4 patients of impaction bone graft group and that 6 patients in the press-fit fixation group experienced prosthesis failure, with the survival rates for the two techniques being 96.43% and 95.16%, respectively. One-way ANOVA showed that prosthesis survival was significantly associated with surgery-related complications (P<0.05) and was not related to the type of the bone defects (P>0.05). The rate of complications bore significant association with the type of bone defects in the two groups (P<0.05). Our study showed that the two revision methods could achieve satisfactory mid-term and long-term results for the reconstruction of severe bone defects. It is of great significance for attaining high prosthesis survival rate to select suitable operation on the basis of the type of bone defect. Careful operative manipulation and post-operative rehabilitation aimed at reducing complications are also important.
Arthroplasty, Replacement, Hip ; methods ; Bone Transplantation ; methods ; Female ; Femur ; surgery ; Follow-Up Studies ; Hip ; surgery ; Humans ; Male ; Middle Aged

OBJECTIVETo study apoptosis and gene FasL expression induced by carbon disulfide in sertoli cells of male rats.

METHODSSertoli cells were exposed to different concentrations of CS(2) (0, 0.36, 0.72, 1.44 micromol/ml) for 24 hours. Survival rate, apoptosis rate, expression level of gene FasL were measured using MTT, FCM, and RT-PCR methods respectively.

RESULTSSertoli cell survival rate decreased as the concentration of CS(2) increased. The survival rate (73.34% +/- 1.39%) was significantly lower than the control group (99.98% +/- 5.48%) when the concentration of CS(2) > or = 1.44 micromol/ml (P < 0.05). Apoptosis rate increased as the CS(2) concentration increased. Apoptosis rate (7.93% +/- 0.43%) was significantly higher when the concentration of CS(2) > or = 1.44 micromol/ml (P < 0.05). Expression level of the FasL significantly increased as the concentrations of CS(2) (P < 0.05).

CONCLUSIONCS(2) is cytotoxic to sertoli cells. It could cause apoptosis of sertoli cells.

Animals ; Apoptosis ; drug effects ; Carbon Disulfide ; toxicity ; Cell Line ; Cell Survival ; Fas Ligand Protein ; metabolism ; Male ; Rats ; Sertoli Cells ; drug effects ; metabolism ; Testis ; cytology

OBJECTIVESTo compare the sensitivity of mammogram and breast dedicated MRI in detecting ductal carcinoma in situ with microinvaion (DCIS-MI) and ductal carcinoma in situ (DCIS) lesions, and to further investigate the independent predictive factors of mammogram and MRI sensitivity.

METHODSFrom August 2009 to November 2011, 122 consecutive confirmed breast cancer patients who had received operations were recruited for this clinical research. These patients were divided into two groups including DCIS (72 cases) and DCIS-MI (50 cases) based on pathologic reports. All the patients were female, with mean ages of 52.6 years and 54.4 years. Preoperative bilateral breast mammogram, breast dedicated MRI depictions and reports as well as histopathological reports were collected.

RESULTSSensitivity of MRI outstood mammogram in each subgroups: 84.7% vs. 42.4% in DCIS (χ(2) = 27.028, P = 0.000), 94.0% vs. 80.0% in DCIS-MI group (χ(2) = 4.540, P = 0.040). And further analysis showed that MRI was more sensitive to high nuclear grade DCIS and DCIS-MI lesions than low nuclear grade ones (OR = 3.471, P = 0.031).

RESULTSof logistic regression analysis proved microcalcification was an independent predictive factor of mammogram sensitivity (OR = 11.287, P = 0.001).

CONCLUSIONSSensitivity of breast dedicated MRI is superior to mammogram in detecting DCIS and DCIS-MI groups. Lesions with microcalcifiation is an independent predictive marker which meant that mammogram would achieve high detection rate in cancers presented calcification on mammogram image when compared with non-calcification. Diagnostic performance of breast MRI is less affected by clinical and pathological characteristics of the early stage breast cancer patients but further increased detection rate is observed in DCIS and DCIS-MI with high nuclear grade lesions which indicated that MRI could detect more early stage cancers with relative more aggression biological behaviour and provide these patients with early surgical interventions before possible progression to invasive breast cancers.

Breast Neoplasms ; diagnosis ; Calcinosis ; diagnosis ; Carcinoma, Ductal, Breast ; diagnosis ; Carcinoma, Intraductal, Noninfiltrating ; diagnosis ; Female ; Humans ; Magnetic Resonance Imaging ; Mammography ; Middle Aged ; Sensitivity and Specificity

OBJECTIVETo observe the effects of carbon fiber dressing on burn wounds.

METHODSTwo hundreds and seventy seven burn patients were randomly divided into treatment group (group T) and control group (group C). The burn wounds were covered with carbon fiber dressing in T group, and with povidone iodine gauze in C group, respectively. The absorption capability of the dressing, inflammatory reaction and bacteria quantitation of wound tissues and wound healing time were observed, and biopsy of wounds were performed.

RESULTSThe absorption capability of the dressing was higher, the wound inflammatory reaction was milder, and bacteria quantitation of wound tissues was lower in the group T than that in group C. The wound healing time in the group T was shorter than that in group C.

CONCLUSIONSCarbon fiber dressing is a new model dressing, it can absorb wound exudation, lessen inflammatory reaction and improve wound healing.

Adolescent ; Adult ; Aged ; Anti-Inflammatory Agents, Non-Steroidal ; therapeutic use ; Bandages ; Burns ; therapy ; Carbon ; therapeutic use ; Child ; Child, Preschool ; Female ; Humans ; Male ; Middle Aged ; Treatment Outcome