OBJECTIVETo evaluate the clinical effects of iliolumbar fixation for the sacrum fractures of Denis type II.

METHODSThe clinical data of 86 patients with sacrum fracture of Denis type II treated by iliolumbar fixation from January 2008 to January 2012 were retrospectively analyzed. There were 55 males and 31 females, aged from 17 to 55 years old with an average of 39.1 years. Among them, 73 cases complicated with pelvis fracture and 13 cases with acetabular fracture; 37 cases with sacral neurological symptoms and 49 cases without sacral neurological symptoms. Fracture healing time, nerve function, clinical function and complications were observed in the patients.

RESULTSIn 86 cases, 6 cases were out of followed-up and 80 cases were followed up from 24 to 71 months with an average of 36 months. The mean fracture healing time was 13 weeks (ranged, 10 to 38 weeks). According to Gibbons scoring to evaluate the neurological function, preoperative nerve rehabilitation, lower limbs feeling, lower limbs activity,bladder and rectum function,total score respectively were 0.62 +/- 0.04, 1.54 +/- 0.35, 1.12 +/- 0.18, 0.23 +/- 0.01, 3.46 +/- 0.47 and postoperative respectively were 0.82 +/- 0.12, 0.36 +/- 0.04, 0.05 +/- 0.01, 0.03 +/- 0.01, 1.25 +/- 0.22, there were statistically significant differences between preoperative and postoperative (P < 0.05). According to Majeed scoring to evaluate the clinical function, postoperative pain, standing, sitting, sexual life, work ability, total score respectively were 22.54 +/- 4.02, 27.93 +/- 5.46, 8.47 +/- 3.61, 2.54 +/- 1.33, 16.46 +/- 4.34, 81.32 +/- 8.73, 60 cases got excellent results, 17 good, 3 fair. The main complications including fracture nonunion of 5 cases,deep incision infection of 1 case, and screw prominence resulting uncomfortable of 8 cases.

CONCLUSIONIliolumbar fixation has the advantages of stable fixation, satisfactory functional rehabilitation, less complications, and is a good method in treating sacrum fracture of Denis type II.

Adolescent ; Adult ; Bone Screws ; Female ; Fracture Fixation, Internal ; Humans ; Male ; Middle Aged ; Retrospective Studies ; Sacrum ; injuries ; surgery ; Spinal Fractures ; surgery ; Treatment Outcome ; Young Adult

Objective To compare the clinical effects on Gartland type Ⅲ fractures in children by open reduction and external fixation with two parallel Kirschner wires and closed reduction.Methods From February 2013 to October 2016,84 children with Gartland type Ⅲ supracondylar fracture of humerus were selected and randomly divided into a control group and an observation group,each with a total of 42 cases.The control group received closed reduction treatment,and the observation group received open and external fixation with two parallel Kirschner wires.The two groups were compared on intraoperative blood loss,incision length,operating time,decreased degrees of carrying angle,reduced flexion-extension at the fractured side and the rates for good and excellent clinical effects.Results The observation group behaved significantly better than the control group in intraoperative blood loss,incision length and operating time (P＜0.05).The rates for good and excellent effects was 90.47％ in the observation group and 73.81％ in the control group,and there was obvious difference between the values in the two groups (P＜0.05).The observation group had the decreased degree of carrying angle statistically lower than that in the control group (P＜0.05),while the reduced flexion-extension at the fractured side was not significantly different from that in the control group (P＞0.05).Conclusion Open reduction and external fixation with two parallel Kirschner wires and closed reduction both gain their advantages when used to treat Gartland type llⅢ fractures in children,the former has high clinical effect,significantly recovered elbow joint function and low incidence rate for cubitus varus,and the latter has slight invasion,small incision while relatively low clinical effect and high incidence rate for cubitus varus.

OBJECTIVEIntravenous administration of basic fibroblast growth factor (bFGF) is effective to reduce the volume of cerebral infract due to ischemia. This study was designed to investigate the molecular mechanism, especially the signal transduction pathways, involved in this protective role of bFGF.

METHODSAnoxia-reoxygenation treated astrocytes were used to study the role of mitogen-activated protein kinase/extracellular signal-regulated kinase kinase (MAPK/ERK kinase, MEK)-ERK signaling pathway after exogenous bFGF administration by Western blot. Electrophoretic mobile shift assay was used to detect the binding activity of early growth response factor-1 (Egr-1), an important transcription factor for endogenous bFGF.

RESULTSbFGF could protect some signal transduction proteins from the oxygen-derived free radicals induced degradation. ERK1/2 was activated and involved in Egr-1 binding activity enhancement induced by exogenous bFGF.

CONCLUSIONMEK-ERK MAPK cascade may be an important signal transduction pathway contributed to bFGF induced enhancement of Egr-1 binding activity in anoxia-reoxygenation injured astrocytes.

Animals ; Animals, Newborn ; Astrocytes ; drug effects ; metabolism ; Cells, Cultured ; Early Growth Response Protein 1 ; metabolism ; Electrophoretic Mobility Shift Assay ; methods ; Fibroblast Growth Factors ; pharmacology ; Mitogen-Activated Protein Kinase Kinases ; metabolism ; Oxygen ; metabolism ; Protein Binding ; drug effects ; Rats ; Signal Transduction ; physiology ; Time Factors

Coronary Artery Disease ; physiopathology ; Fistula ; physiopathology ; Heart Ventricles ; Humans ; Iatrogenic Disease ; Male ; Middle Aged ; Percutaneous Coronary Intervention ; adverse effects

OBJECTIVETo evaluate the application of multi-detector row CT (MDCT) and CT angiography (CTA) for detecting early signs of acute bowel ischemia (ABI) in experimental porcine models.

METHODSTwelve pigs were assigned to four groups with 3 in each group. The digital subtraction angiography of superior mesenteric artery (SMA) and the embolization of branches of SMA with gelatin sponge and blood clot were performed by percutaneous transfemoral artery puncture and catheterization. MDCT pre- and post-contrast scanning in the arterial, venous and delay phase and CTA with three-dimensional reconstruction were carried out at pre-operation, 3 h, 6 h, 9 h, and 12 h after occlusion. The normal mesenteric vascular anatomy, arterial occlusion, mesentery and bowel changes, and dynamic change were evaluated.

RESULTSABI changes were identified pathologically in all the 12 experimental pigs, and the severity of ischemia increased over time after embolization. CTA showed all 57 embolized branches of SMA and 29 of 34 unoccluded arterial branches with 5 false-positive vessel occlusions. The sensitivity and specificity of CTA were 100% and 85.3%, respectively. Thin-slab maximum intensity projection (TSMIP) revealed the disappearance of distal comb-like vessel branches and brush-like vasa recta, which were clearly delineated in the normal bowel segments. Using this criterion, TSMIP correctly defined 23 of 24 ischemic bowel segments and all the 12 normal bowel segments with a sensitivity of 95.8% and a specificity of 100%.

CONCLUSIONSMDCT and CTA reliably define normal and occluded mesenteric vessels in the pig. It can easily detect ischemic bowel segment by identified early changes of ischemia. The early direct ischemic signs are occluded vessels, the disappearance of distal comb-like branches or brush-like vasa recta, and poor bowel enhancement. The early indirect sign is bowel dilatation with fluid collection.

Angiography ; methods ; Animals ; Female ; Intestinal Diseases ; diagnostic imaging ; etiology ; Ischemia ; diagnostic imaging ; etiology ; Mesenteric Arteries ; diagnostic imaging ; Mesenteric Vascular Occlusion ; complications ; diagnostic imaging ; Mesentery ; blood supply ; Swine ; Tomography, X-Ray Computed ; methods

OBJECTIVETo compare and analyze the accuracy of two diagnostic criteria of drug-induced liver injuries.

METHODS230 cases of drug-induced liver injury diagnosed clinically in the 302 hospital of PLA were retrospectively studied. The drugs which induced liver injuries were summarized and analyzed. Danan's international consensus criteria and Maria's diagnostic scale were applied to diagnose these 230 cases again and then the differences of diagnostic results were analyzed and compared.

RESULTSThe drugs which induced liver injuries in the 230 patients were arranged in order of their usage frequencies: traditional Chinese herbs and the like, antibiotics, antipyretic analgesics, antituberculosis medicines, cardiovascular drugs, over-the-counter health stuff, psychopharmaceuticals, dermatological agents, drug for diabetes, tapazol, and others. Based on the 230 adult inpatients with drug-induced liver injury, according to Danan's international consensus criteria, 149 cases (64.8%), 71 (30.9%) and 10 (4.3%) were classified as drug-related, indeterminate and drug-unrelated respectively; according to Maria's diagnostic scale, not one was a definite drug-induced liver injury, 55 cases (23.9%) were probable, while 126 (54.8%), 33 (14.3%) and 16 (7.0%) were possible, unlikely and excluded respectively.

CONCLUSIONThe accordance rate of Danan's international consensus criteria and clinical diagnosis was higher than that of Maria's diagnostic scale. Neverthelessìthe current diagnostic methods for drug-induced liver injury need to be revised for clinical practice.

Adolescent ; Adult ; Aged ; Chemical and Drug Induced Liver Injury ; classification ; diagnosis ; Female ; Humans ; Liver Diseases ; diagnosis ; Male ; Middle Aged ; Reference Standards ; Retrospective Studies ; Young Adult

OBJECTIVETo investigate the expressions of Oct4 and CD133 and their correlation in colonic cancer.

METHODSThe expression of Oct4 and CD133 were detected by immunohistochemistry in 30 colon cancer specimens and the paired adjacent tissues.

RESULTSThe positivity rates of Oct4 and CD133 expression were 83.3% (25/30) and 73.3% (22/30) in colonic cancer tissue, respectively, and their expressions were positively correlated (r=0.586, P<0.05). The matched adjacent tissues showed significantly lower levels of Oct4 and CD133 expressions (P<0.01).

CONCLUSIONThe expressions of Oct4 and CD133 are upregulated in colonic cancer compared with those in the adjacent tissues and show a positive correlation. Oct4 and CD133 may play an important role in the development of colon cancer.

AC133 Antigen ; Adenocarcinoma ; metabolism ; surgery ; Adult ; Aged ; Antigens, CD ; metabolism ; Colonic Neoplasms ; metabolism ; surgery ; Female ; Glycoproteins ; metabolism ; Humans ; Immunochemistry ; Male ; Middle Aged ; Octamer Transcription Factor-3 ; metabolism ; Peptides ; metabolism ; Up-Regulation ; Young Adult

Osteosarcoma is the most common primary malignant bone cancer in children and adolescents. Emerging evidence has suggested that the capability of a tumor to grow is driven by a small subset of cells within a tumor, termed cancer stem cells (CSCs). Although several methods have been explored to identify or enrich CSCs in osteosarcoma, these methods sometimes seem impractical, and chemotherapy enrichment for CSCs in osteosarcoma is rarely investigated. In the present study, we found that short exposure to chemotherapy could change the morphology of osteosarcoma cells and increase sarcosphere formation in vitro, as well as increase tumor formation in vivo. Furthermore, methotrexate (MTX)-resistant U2OS/MTX300 osteosarcoma cells were larger in size and grew much more tightly than parental U2OS cells. More importantly, U2OS/MTX300 cells possessed a higher potential to generate sarcospheres in serum-free conditions compared to parental U2OS cells. Also, U2OS/MTX300 cells exhibited the side population (SP) phenotype and expressed CSC surface markers CD117 and Stro-1. Notably, U2OS/MTX300 cells showed a substantially higher tumorigenicity in nude mice relative to U2OS cells. Therefore, we conclude that chemotherapy enrichment is a feasible and practical way to enrich osteosarcoma stem cells.
Animals ; Antigens, Surface ; metabolism ; Antimetabolites, Antineoplastic ; pharmacology ; Bone Neoplasms ; metabolism ; pathology ; Cell Line, Tumor ; Cell Proliferation ; Drug Resistance, Neoplasm ; Humans ; Methotrexate ; pharmacology ; Mice ; Mice, Nude ; Neoplasm Transplantation ; Neoplastic Stem Cells ; drug effects ; pathology ; Osteosarcoma ; metabolism ; pathology ; Phenotype ; Proto-Oncogene Proteins c-kit ; metabolism

OBJECTIVETo compare the diagnostic value between digital photography (DR) and multi-slice spiral CT (MSCT) in fracture and dislocation of foot and ankle.

METHODSFrom August 2010 to August 2012, the DR and MSCT data of 52 patients with fracture and dislocation of foot and ankle were compared according to results of surgery or discharge diagnosis. There were 37 males and 15 females, aged from 15 to 49 years old. Wilcoxon signed rank test was used for statistical analysis.

RESULTSThe results of 52 cases of MSCT were matched with the postoperative or discharge diagnosis. A total of 172 fractures were found on MSCT and 98 fractures were found on DR, the results had significant difference in detecting fracture (V=1 081, P<0.05); A total of 24 dislocations were found on MSCT and 16 dislocations were found on DR,the results also had significant difference in detecting dislocation (V=21, P<0.05). Fractures of 6 cases with DR diagnosis were corrected and located by MSCT.

CONCLUSIONMSCT is significantly better than DR in diagnosis of fracture and dislocation of foot and ankle. The examination of two parts should be performed in DR. MSCT and multi-planar reconstruction (MPR) examination should be further performed if DR results are unclear or do not match with clinical symptoms, missed diagnosis and misdiagnosis can be avoided.

Adolescent ; Adult ; Ankle Injuries ; diagnostic imaging ; Female ; Foot Injuries ; diagnostic imaging ; Fractures, Bone ; diagnostic imaging ; Humans ; Image Processing, Computer-Assisted ; methods ; Joint Dislocations ; diagnostic imaging ; Male ; Middle Aged ; Multidetector Computed Tomography ; methods ; Photography

OBJECTIVETo study the growth inhibition and apoptosis induction effects of bufalin on human osteosarcoma cell lines in vitro.

METHODSU-2OS and U-2OS/methotrexate (MTX) 300-resistant cell lines were treated with bufalin. Cell viability was assessed by MTT assay. Cell-cycle status, apoptosis-inducing effects, and the expression of apoptosis-related proteins were evaluated by flow cytometry, fluorescent staining, DNA fragmentation assay, and Western blotting.

RESULTSBufalin inhibited cell growth in both U-2OS and U-2OS/MTX300 cells. The IC(50) values of bufalin for U-2OS and U-2OS/MTX300 cells were (8.49 ± 2.1) ng/ml and (10.19 ± 1.7) ng/ml, respectively. The induction of G(2)/M cell-cycle arrest was also seen in the bufalin-treated cells. The bufalin-induced apoptosis was confirmed by increased expression of tumor suppressor protein p53, bax and decreased expression of bcl-2.

CONCLUSIONBufalin inhibits the growth of and induces apoptosis in both MTX-sensitive and MTX-resistant human osteosarcoma U-2OS cell lines. The apoptosis-inducing effect of bufalin is not influenced by the presence of high levels of DHFR.

Antineoplastic Agents ; pharmacology ; Apoptosis ; drug effects ; Bone Neoplasms ; metabolism ; pathology ; Bufanolides ; pharmacology ; Cell Cycle ; drug effects ; Cell Line, Tumor ; Cell Proliferation ; drug effects ; Drug Resistance, Neoplasm ; Humans ; Methotrexate ; pharmacology ; Osteosarcoma ; metabolism ; pathology ; Proto-Oncogene Proteins c-bcl-2 ; metabolism ; Tetrahydrofolate Dehydrogenase ; metabolism ; Tumor Suppressor Protein p53 ; metabolism ; bcl-2-Associated X Protein ; metabolism