Ankle Injuries ; diagnosis ; surgery ; therapy ; Ankle Joint ; surgery ; Humans ; Joint Instability ; diagnosis ; surgery ; therapy

Accessory navicular source flatfoot is one of the foot deformity of clinical common disease,its treatment method is more controversial, differences in clinical efficacy of different surgical methods, according to accessory navicular source flatfoot symptoms of surgical treatment,there is no uniform standard, around a pair of accessory navicular excision how to reconstruct the arch produced a series of operation methods, the clinical curative effect of different operative methods produce also different, how to develop the operation strategy, choose operation method, and after acessory navicular excision whether to rebuild posterior tibial tendon, how to rebuild, the problems such as how to rebuild is the research hotspot and difficulty, looking forward to further research.
Flatfoot ; diagnosis ; surgery ; Foot Diseases ; surgery ; Humans ; Reconstructive Surgical Procedures ; methods ; Tarsal Bones ; abnormalities ; surgery

OBJECTIVETo investigate the influence of fluorescent protein expression on the proliferation of murine NIH3T3 cells, so as to provide a theoretical basis for cell tracing technology.

METHODSNIH3T3 cells were cultured in vitro, and were randomly divided into control, pLEGFP-N1 (with transfection of pLEGFP-N1 retroviral vector), pEGFP-N1 (with transfection of pEGFP-N1 vector) and pDsRed2-C1 (with transfection of pDsRed2-C1 vector) groups. Then the cells were screened by G418 for 3 weeks. The changes in cell adhesive rate were observed and the population doubling times was determined by growth curve.

RESULTSThere was obvious fluorescent protein expression in the transfected NIH3T3 cells after G418 selection, and the highest percentage of labeled NIH3T3 cells was found in pLEGFP-N1 group. The population doubling time in pDsRed2-C1 (40.3+/-0.7 h) , PEGFP-N1 (39.6 +/- 0.6 h) and pLEGFP-N1 (36.5 +/- 0.7 h) groups was evidently longer than that in control (27.9 +/- 0.6 h, P < 0.01), with high adhesive rate in each group.

CONCLUSIONThe expression of fluorescent protein exhibited some inhibitory effect on the proliferation of NIH3T3 cells in vitro. Since the inhibitory effect by retroviral vector was weaker compared with eukaryotic vector, it should be the first choice for fluorescent protein labeling during cell transplantation.

Animals ; Cell Culture Techniques ; Cell Proliferation ; Green Fluorescent Proteins ; biosynthesis ; Mice ; NIH 3T3 Cells ; Transfection

Adult ; Arthroscopes ; Bone Cysts ; surgery ; Bone Neoplasms ; surgery ; Female ; Humans ; Talus ; surgery

OBJECTIVETo prepare and observe the physicochemical properties of scaffold materials of heterogeneous deproteinized tissue-engineered bone.

METHODSDeproteinized bone was made through a series of physicochemical treatments in pig ribs and analyzed with histological observation, scanning electron microscopy, infrared spectrum, X-ray diffraction and energy dispersive analysis, Kjeldahl determination and mechanics analysis.

RESULTSInterstitial collagen fiber was positive and mucin was negative in deproteinized bone, but, both were positive in fresh bone. Deproteinized bone maintained natural pore network. Its pore size was 472.51 micromolar+/-7.02 micromolar and the porosity was 78.15%+/-6.45%. The results of infrared spectrum showed that collagen was present in deproteinized bone. Both fresh and deproteinized bone had curve of hydroxyapatite. The Ca/P ratios were 1.71+/-0.95 and 1.68+/-0.76 (P larger than 0.05), and the protein contents were 26.6%+/-2.23% and 19.1%+/-2.14% (P less than 0.05) in fresh and deproteinized bone, respectively. There was no significant difference of destruction load under compression and maximal destruction load between fresh and deproteinized bone (P larger than 0.05). The elastic modulus was higher in deproteinized bone than that in fresh bone (P less than 0.05).

CONCLUSIONSPhysicochemical properties and mechanic strength of deproteinized tissue-engineered bone meet the demands of ideal scaffold materials. But, its immunogenicity should be observed through further experiments for its clinical applications.

Animals ; Biomechanical Phenomena ; Bone and Bones ; chemistry ; physiology ; Hydroxyapatites ; Materials Testing ; Swine ; Tissue Engineering

OBJECTIVETo evaluate the biological safety of manufactured heterologous deproteinized bone and to provide an experimental basis for clinical applications.

METHODSDeproteinized bone (10 mm) and leaching liquor were made from pig ribs with a series of physical and chemical methods, then were evaluated through acute and subacute toxicity test, hemolysis test, pyrogen test, intracutaneous test, intramuscular implantation test and cytotoxity test.

RESULTSNo obvious toxicity, hemolysis, pyrogenic characteristics, skin irritation, inflammatory reaction after intramuscular implantation and cytotoxity were observed.

CONCLUSIONSThe heterologous deproteinized bone has good biological safety and meets all the demands of scaffold material for tissue engineering.

Animals ; Bone Transplantation ; Cytotoxicity Tests, Immunologic ; Hemolysis ; Mice ; Rabbits ; Tissue Engineering ; Transplantation, Heterologous

OBJECTIVETo investigate Caspase-3 expression and its role in neuronal apoptosis.

METHODSThe T13-L2 spinal cord of rats was injured by traction after the amplitude of P1-N1 wave, monitored by a cortical somatosensory evoked potential (CSEP) monitor, decreased to seventy percent of that before operation. Then rats were killed in 6 h, 1 d, 4 d, 7 d, 14 d and 21 d respectively after operation. Flow cytometer terminal deoxynucleotldyl transferease-mediated biotinylated deoxynuridine triphosphate nick end labeling (TUNEL), Caspase-3 activity assay and immunohistochemical method were applied to investigate Caspase-3 expression in the spinal cord tissue and to study neuronal apoptosis in rats.

RESULTSAfter spinal cord injury, apoptotic cells detected by flow cytometry and TUNEL-positive cells were significantly more, and positive immunohistochemical staining of Caspase-3 and Caspase-3 activity were significantly higher in Group injury than in Groups control and laminectomy, respectively (P > 0.05, P > 0.01). Similar trend of changes was noticed in apoptotic cells, TUNEL-positive cells and positive immunohistochemical staining of Caspase-3, all of which reached their respective peak 7 days after operation. Caspase-3 activity reached its peak, however, 4 days postoperatively.

CONCLUSIONSIncreased expression and activity of Caspase-3 protein in neurons after tractive spinal cord injury is the biochemical signal of early spinal cell apoptosis. It is of great significance for understanding the mechanism of spinal cord injury.

Animals ; Apoptosis ; Caspase 3 ; Caspases ; analysis ; physiology ; Flow Cytometry ; Immunohistochemistry ; In Situ Nick-End Labeling ; Rats ; Rats, Sprague-Dawley ; Spinal Cord Injuries ; enzymology ; pathology

Since partial-thickness tears of the rotator cuff were described well by Codman in 1934, they have been extensively discussed in all kinds of literatures. Partial-thickness tears of the rotator cuff are now considered to play a more significant role than previously in inducing patients' disability. Partial-thickness cuff tears deserve more clinical attention. Both accurate diagnosis and proper surgical repair are very essential. The cognition of partial-thickness tears has been deepened in the last decades. In this paper we will review the etiology, classification and clinical evaluation of partial-thickness tears of the rotator cuff.
Diagnosis, Differential ; Diagnostic Imaging ; Humans ; Rotator Cuff Injuries ; Wounds and Injuries ; classification ; diagnosis ; etiology

Objective To explore the clinical effect of the semi-shoulder arthroplasty in the treatment of humeral head necrosis.Methods Twenty patients with head necrosis of the humerus in first hospital affiliated to army medical university from February 2008 to January2018 were collected, including 8 cases of males, 12 cases of females, 7 cases of left shoulder and 13 cases of right shoulder.The patients were aged from 45 to 83 years old, mean (67.40±5.06) years old.All patients were followed up for at least 6 months, the anterior flexion angle, abduction angle, external rotation angle and internal rotation angle of shoulder joint were measured, the function of shoulder joint was evaluated by ASES, UCLA, SST, and VAS, and the imaging examination was conducted.Results All patients were followed up for 6 to 37 months after surgery, with average (18.50±5.31) months, 2 patients presented mild pain during shoulder joint activity, 1 patient presented brachial plexus nerve damage, but returned to normal 3 months after surgery.No complication happened.X-ray reexamination showed good position and angle of the prosthesis during the follow-up period.The preoperative anteflexion angle, angle of outreach, swing angle and swing angle of the shoulder joint were respectively (55.24±8.21) °, (42.58±6.21) °, (12.95±2.74) °, (17.79±3.65) °, the last follow-up were respectively (120.76±13.15) °, (103.08±10.54) °, (33.51±3.14) °, (50.10±7.25) °, the differences were significant (P＜0.01);The preoperative ASES score, UCLA score, SST score, VAS score of the shoulder joint were respectively (38.24±5.21), (12.58±3.93), (3.25±1.42), (6.79±1.65), the last follow-up were respectively (75.74±9.69), (33.08±4.5), (9.11±1.85), (1.45±0.24), the differences were significant (P＜0.01).Conclusion Artificial semi-shoulder replacement for the treatment of humeral head necrosis can significantly improve the range of limb function, relieve the pain symptoms of patients and improve patients'quality of life, which has excellent and good shoulder function rate and fewer complications.

A recently identified protein, FAN1 (FANCD2-associated nuclease 1, previously known as KIAA1018), is a novel nuclease associated with monoubiquitinated FANCD2 that is required for cellular resistance against DNA interstrand crosslinking (ICL) agents. The mechanisms of FAN1 regulation have not yet been explored. Here, we provide evidence that FAN1 is degraded during mitotic exit, suggesting that FAN1 may be a mitotic substrate of the anaphase-promoting cyclosome complex (APC/C). Indeed, Cdh1, but not Cdc20, was capable of regulating the protein level of FAN1 through the KEN box and the D-box. Moreover, the up- and down-regulation of FAN1 affected the progression to mitotic exit. Collectively, these data suggest that FAN1 may be a new mitotic substrate of APC/CCdh1 that plays a key role during mitotic exit.
Anaphase-Promoting Complex-Cyclosome ; Bone Neoplasms ; metabolism ; pathology ; Cadherins ; genetics ; metabolism ; Cdc20 Proteins ; Cell Cycle Proteins ; genetics ; metabolism ; Cell Line, Tumor ; Exodeoxyribonucleases ; genetics ; metabolism ; HEK293 Cells ; Humans ; Mitosis ; Osteosarcoma ; metabolism ; pathology ; Ubiquitin-Protein Ligase Complexes ; genetics ; metabolism