BACKGROUND: Greatly importance has been attached to ceramic-on-ceramic bearing surface due to its excel ent wear resistance. But the risks of squeaking and ceramic fracture also go with it. Up til now, the choice between ceramic-on-ceramic and ceramic-on-polyethylene bearing surfaces in primary total hip arthroplasty remains controversial. OBJECTIVE: To compare the clinical outcomes and safety between ceramic-on-ceramic versus ceramic-on-polyethylene bearing surfaces in total hip arthroplasty based on meta analysis. METHODS: We electronical y searched databases including PubMed/Medline, Embase, Web of Science, Cochrane Col aboration database, Chinese Biomedical Literature Database (CBMdisc) and China National Knowledge Internet for randomized control ed trials on the comparison between ceramic-on-ceramic versus ceramic-on-polyethylene bearing surfaces in total hip arthroplasty from inception to January 2015. References of the included studies were also retrieved. Investigators severely selected the studies, extracted data and assessed the quality according to the inclusion and exclusion criteria. Then, meta-analysis was performed using RevMan 5.2 software. RESULTS AND CONCLUSION: Nine randomized control ed trials were included, involving 1 231 hips with ceramic-on-ceramic prosthesis and 932 hips with ceramic-on-polyethylene prosthesis. Meta analysis showed that both bearing surfaces achieved satisfied function recovery. But ceramic-on-ceramic had significantly increased risks of squeaking and ceramic fracture, meanwhile ceramic-on-polyethylene showed significantly higher wear rate. There were no significant differences in intra- or post-operative dislocation, osteolysis and other complications and prosthesis failure with any reason between two bearing surfaces. These results suggest that during the short- to mid-term fol ow-up period, no sufficient evidence can tel that ceramic-on-ceramic was obviously super than ceramic-on-polyethylene. Long-term fol ow-up is required for further evaluation.

OBJECTIVETo study the changes in serum cortisol levels in adolescents with type 1 diabetes (T1DM) and elevated depressive symptoms.

METHODSTwenty-eight adolescents with T1DM and 31 healthy peers were assessed for depressive symptoms using a depression self-rating scale developed by the Epidemiological Survey Center. Selected subjects were classified into four groups: T1DM with elevated depressive symptoms group (n=15), T1DM without elevated depressive symptoms group (n=13), elevated depressive symptoms without T1DM group (n=15), and normal control group (n=16). Fasting blood samples were collected in the morning, and the levels of serum cortisol were compared among the four groups. The correlations of serum levels of cortisol and glycosylated hemoglobin A1c (HbA1c) with the score of depression self-rating scale were evaluated by Pearson correlation analysis.

RESULTSThe fasting serum cortisol levels in the 28 T1DM patients were significantly higher than in the 31 healthy peers (P<0.01). The fasting cortisol levels in the T1DM with elevated depressive symptoms group were significantly higher compared with those in the elevated depressive symptoms without T1DM group and normal control group (P<0.01). In adolescents with T1DM, serum HbA1c level was positively correlated with the score of depression self-rating scale (r=0.481, P=0.010).

CONCLUSIONSThe fasting serum cortisol levels in adolescents with T1DM and elevated depressive symptoms are significantly increased, suggesting that the patients with comorbidity of T1DM and depression develop dysfunction of the corticotropin-releasing hormone-adrenocorticotropic hormone-cortisol axis. The elevated depressive symptoms may be associated with a poor control of glucose metabolism.

Adolescent ; Adrenocorticotropic Hormone ; physiology ; Child ; Corticotropin-Releasing Hormone ; physiology ; Depression ; blood ; etiology ; Diabetes Mellitus, Type 1 ; blood ; Female ; Glucose ; metabolism ; Glycated Hemoglobin A ; analysis ; Humans ; Hydrocortisone ; blood ; Male

OBJECTIVESTo investigate if there is altered microRNAs (miRNAs) expression in aortic dissection (Debakey Type A) and normal aorta tissue.

METHODSTotal RNA was exacted from aorta of 5 patients with aortic dissection (AD) and four patients without aortic diseases (NA). miRNAs of the aortic tissues were analyzed by miRNA microarray. Reverse transcription polymerase chain reaction (RT-PCR) was performed to verify the expression of miRNAs in larger sample size (AD = 11 and NA = 9).

RESULTShsa-miR-146b-5p_st, hsa-miR-19a_st and hsa-miR-505_st were significantly upregulated while hsa-miR-1268_st and hsa-miR-939_st were significantly downregulated [fold change > 2, q-value (%) ≤ 5] in AD group compared with NA group. RT-PCR verified hsa-miR-146b-5p_st miRNAs change in AD group.

CONCLUSIONSAltered miRNAs expression might play an essential role in the pathogenesis of aortic dissection formation and hsa-miR-146b-5p_st might serve as a new diagnosis biomarker of aortic dissection.

Aneurysm, Dissecting ; genetics ; Gene Expression Profiling ; Humans ; MicroRNAs ; genetics ; metabolism ; Oligonucleotide Array Sequence Analysis ; Reverse Transcriptase Polymerase Chain Reaction

Gene Expression ; Graft Occlusion, Vascular ; prevention & control ; Humans ; Liver ; blood supply ; Stents ; Vascular Endothelial Growth Factor A ; genetics ; metabolism

OBJECTIVETo discuss whether fibroblast-like cells can transform into osteoblasts under specific condition during distraction osteogenesis.

METHODSFibroblast-like cells were cultured in vitro. BMP-2, TGF-beta(1), BMP-2 and TGF-beta(1) were added into the medium, and the cellular change were observed by histochemistry and immunohistochemistry methods. The distraction was given on the membrane of fibroblast-like cells, and the cellular change were observed under the distraction.

RESULTSfibroblast-like cells from the joint could transform into osteoblasts under the effect of BMP-2 or BMP-2 with TGF-beta(1). Fibroblast-like cells from other regions could not transform into osteoblasts.

CONCLUSIONThe osteoblasts during distraction osteogenesis are multi-origin.

Animals ; Bone Morphogenetic Protein 2 ; pharmacology ; Cells, Cultured ; Fibroblasts ; cytology ; drug effects ; Osteoblasts ; cytology ; drug effects ; Osteogenesis, Distraction ; Rabbits ; Transforming Growth Factor beta1 ; pharmacology

The aim of the research is to investigate the genetic characteristics of Legionella pneumophila serogroup1 (LP1)in Sichuan Province.The sequence-based typing (SBT) and multiple-locus VNTR analysis (MLVA) were used to describe the genetic polymorphism of 42 strains which were isolated from 1989-2016 in Sichuan Province,China.According to the reference,PCR was used to detect the 8-VNTR loci and 7 housekeeping genes respectively.The VNTR results were determined by using capillary electrophoresis,and the SBT results were sequenced and compared with the database of EWGLI.Results showed that totally 42 stains were divided into 8 MLVA types with the advantage types were M08 (47.6 ％) and M07 (23.8 ％).Twelve ST types were obtained with 3 main clonal complex and 2 singleton,including 2 novel ST types,among those,ST1 was the predominant type,accounting for 52.3 ％,following by ST630 (14.2 ％).In conclusion,our results demonstrated MLVA and SBT were both applied to the research for molecular epidemiological investigation of LP1 and showed the high genetic polymorphism and the regional specificity.The results also suggest that the isolates are a potential threat to the public,effective control and prevention strategies are urgently needed.

OBJECTIVE: To study the morphological changes of the rat claw inner skeletal muscle after ulnar nerve injury at different sections and different recovery times. METHODS: Forty-two adult male Sprague-Dawley rats were selected and placed randomly in seven groups. After establishing model of injury and repair of claw inner skeletal muscle by cutting off the ulnar nerve, the muscle wet weight, cross section area of myocytes, and collagen fibers were measured. RESULTS: Claw inner skeletal muscle atrophy was significantly less in experiment groups compared with the control groups after ulnar nerve injuries. The functional recovery was better in the early repair groups than the late repair group. Collagen fibers increased slowly in earlier stage, but more significantly in late stage. The muscle atrophy was similar in wrist and elbow after ulnar nerve injury during the same recovery period. CONCLUSION The function can recover completely or partly in early repair groups, but not quite effective in late stage. The increase of collagen fiber is one of the reasons to undermine the recovery effect of damaged ulnar nerve. There is no obvious difference of effect on the morphological changes of the rat claw inner skeletal muscle no matter the ulnar nerve is injured at wrist or elbow.
Animals ; Male ; Muscle, Skeletal/pathology* ; Muscular Atrophy/prevention & control* ; Nerve Regeneration/physiology* ; Random Allocation ; Rats ; Rats, Sprague-Dawley ; Plastic Surgery Procedures ; Ulnar Nerve/surgery*

OBJECTIVETo study the therapeutic effect of bleomycin-A5 injection under eletrolaryngoscope for treatment of large laryngopharyngeal and laryngeal hemangioma.

METHODSIntratumor bleomycin-A5 injection under eletrolaryngoscope was performed in 18 cases of large laryngopharyngeal and laryngeal hemangioma with surface anaesthesia, for totally 7 to 14 (mean 10.2) injections in each case.

RESULTSTwelve patients were cured and 6 showed obvious improvement. Follow-up of the patients for over one year found no recurrence of the hemangioma.

CONCLUSIONBleomycin-A5 injection is a minimal invasive procedure for treatment of large laryngopharyngeal and laryngeal hemangioma, causing less pain and better preserving the laryngeal function without the necessity of tracheotomy.

Adolescent ; Adult ; Aged ; Antibiotics, Antineoplastic ; administration & dosage ; Bleomycin ; administration & dosage ; analogs & derivatives ; Female ; Follow-Up Studies ; Hemangioma ; drug therapy ; Humans ; Injections, Intralesional ; methods ; Laryngeal Neoplasms ; drug therapy ; Laryngoscopes ; Male ; Middle Aged ; Pharyngeal Neoplasms ; drug therapy

OBJECTIVETo evaluate postoperative glottic area and vocal quality of three various surgical techniques for treating bilateral vocal cord paralysis, including laser arytenoidectomy (Group A, 24 cases), reinnervation of the posterior cricoarytenoid muscle by phrenic nerve (Group B, 9 cases) and arytenoidectomy accompanying lateral cordopexy by extralaryngeal approach (Woodman's procedure, Group C, 13 cases).

METHODS46 cases suffered from bilateral recurrent laryngeal nerve injury were included in our study. The pre-postoperative glottic measurement and vocal acoustic parameters were analyzed.

RESULTSThe decannulated cases in group A and group B and group C were 22, 8, 13 respectively. The post-operative mean maximal glottic area was (47.2 +/- 7.4) mm2, (78.3 +/- 16.0) mm2, (48.1 +/- 6.5) mm2 respectively. Group B cases glottic area was larger than that of group A and group C (t value were 4.46 and 3.85, P value were 0.000 and 0.001). No significant difference was found between group A and group C (t = 1.68, P = 0.101). After surgery, in group A, 17 cases voice quality was the same compared with that of before surgery, and 7 cases voice quality had become worse; In group B, the voice quality had become better in 5 cases, completely recovered in 1 case, and had not change in 3 cases; In group C, the voice quality had become deteriorated in 10 cases and no change in 3 cases. And in group B, ipsilateral diaphragm paralysis in 9 cases after surgery, whose vital capacity and forced vital capacity had decreased to 72%-84%, 76%-84% of that before the surgery respectively; and the diaphragm mobility had recovered by 35%-76% respectively, while vital capacity and forced vital capacity had become 93%-97%, 91%-98% of that before the surgery. In Group B, all cases' pulmonary function was normal half a year postoperatively.

CONCLUSIONSReinnervation of the posterior cricoarytenoid muscle by phrenic nerve seems to be best procedure with better post-operative voice and larger glottic area. Although the sufficient airway for decannulation can be acquired in Group A and Group C, but most of patients in Group A had pre-operative vocal level and badly abnormal in Group C.

Adult ; Aged ; Arytenoid Cartilage ; surgery ; Female ; Glottis ; physiopathology ; Humans ; Laser Therapy ; Male ; Middle Aged ; Phrenic Nerve ; surgery ; Treatment Outcome ; Vocal Cord Paralysis ; physiopathology ; surgery ; Voice Quality ; Young Adult

OBJECTIVETo study angiogenesis and regulatory factors in the proliferated prostatic tissues of Sprague Dawley (SD) rats with BPH induced by testosterone.

METHODSSixteen castrated SD rats, aged 8 weeks and weighing 200 approximately 250 g, were equally randomized into a model group and a control group, and the BPH model was established by subcutaneous injection of testosterone. Immunohistochemistry and MIAS (micro-image analysis system) were used to test the manifestations of MVD (microvessel density), VEGF (vascular endothelium growth factor), flk-1, endostatin, MMP-2 (matrix metalloproteinase-2) and TIMP-2 (tissue inhibitor of metalloproteinase-2) in the prostatic tissues of both the model and the control groups. Multiple linear regression with the stepwise method was adopted to analyze the data.

RESULTSThe manifestations of MVD, VEGF, flk-1, MMP-2, MMP-2/TIMP-2 and VEGF/endostatin in the model group were higher, while that of endostatin was lower than in the control group (P < 0.01), and the manifestation of TIMP-2 showed no statistical difference between the two groups. The regression analysis indicated that MVD was positively correlated to VEGF, VEGF/endostatin and MMP-2/TIMP-2 (r = 0.974, 0.986, 0.982, P < 0.05) and negatively correlated to endostatin (r = - 0.975, P < 0.05) .

CONCLUSIONTestosterone could induce BPH in SD rats by increasing MVD and promoting the multiplication of vascular endothelial cells after regradation of basement membrane.

Animals ; Disease Models, Animal ; Endostatins ; biosynthesis ; Male ; Matrix Metalloproteinase 2 ; biosynthesis ; Neovascularization, Pathologic ; chemically induced ; metabolism ; Prostate ; blood supply ; metabolism ; Prostatic Hyperplasia ; chemically induced ; metabolism ; Random Allocation ; Rats ; Rats, Sprague-Dawley ; Testosterone ; Tissue Inhibitor of Metalloproteinase-2 ; biosynthesis ; Vascular Endothelial Growth Factor A ; biosynthesis ; Vascular Endothelial Growth Factor Receptor-2 ; biosynthesis