Objective To investigate the activation mechanism of matrix metalloproteinase-13 zymogen (pro-MMP-13) induced by nitric oxide (NO). Methods Human chondrosarcoma cells (SW1353) were grouped and treated with the NO donor S-nitroso-N-acetyl-penicillamine (SNAP), SNAP + NO scavenger oxyhemoglobin (OxyHb), and SNAP + tissue inhibitor of metalloproteinase material -2 (TIMP-2) respectively. After stimulation, matrix metalloproteinase -13 ( a-MMP-13 ) expression level was detected. Besides, the expression levels of MT1- MMP were detected after SW1353 cells stimulated with SNAP and SNAP + OxyHb, respectively. At last, the activities of the recombinant MMP-13 (r-MMP-13) were detected after r-MMP-13 stimulated with SNAP, recombinant MT1-MMP (r-MT1-MMP) and r-MT1-MMP + TIMP-2,respectively. Results SNAP increased human chondrocytes a-MMP-13 expression, OxyHb and TIMP-2 inhibited a- MMP- 13 expression. SNAP also increased the expression of MT1- MMP levels, OxyHb inhibited the expression of MT1-MMP. r-MT1-MMP activated the r-MMP-13, but SNAP did not, TIMP-2 inhibited the activity of r-MMP-13 induced by r-MT1-MMP. Conclusions NO can not directly activate pro-MMP13 by the role of S-nitroso-(S nitrosylation). MT1-MMP mediates the activiation of pro-MMP-13 induced by NO.

AlM: To compare the clinical efficacy of treatment on recurrent pterygium using different concentration mitomycin C ( MMC) in the pterygium excision operation combined with the corneal limbal stem cell autografting ( CLSCA) .METHODS: Sixty patients ( 65 eyes ) with recurrent pterygium were randomly divided into three groups. All cases were accepted CLSCA, 21 patients (22 eyes) were given 0. 15g/L MMC during operation, 20 patients ( 22 eyes) were given 0. 25g/L MMC during operation, 19 patients ( 21 eyes ) were given 0. 4g/L MMC during operation. The patients were followed up for 6mo to 2a.RESULTS:The recurrent rates of the three groups were 9%, 5%, 5% respectively. There was no statistically significant differences (P>0. 05). The complication rates of the three groups were 5%, 36%, 33% respectively. There were statistically significant differences (P<0. 05). CONCLUSlON: The treatment to the recurrent pterygium using low concentration MMC has the similar recurrence rates, but the complication rate was lower, it is an ideal operation method, and it is worth popularization and application.

In this paper the last study of the role of nitric oxide(NO) in the development of osteoarthritis is reported. The study of dependability of the content of NO in the inflamed tissue and development of osteoarthritis showed that NO had an important role in the damage of cartilage,and that the inhibition of excess release of NO could improve the repair of cartilage,and that the effective inhibitor of nitric oxide synthase might cure osteoarthritis.

Viral encephalitis is infectious diseases caused by many kinds virus which infects the brain and produces a series of clinical manifestations,it is an common disease in children.Rhabdomyolysis is a sort of syndrome characterized by striated muscle necrosis and the release of intracellular muscle constituents into the circulation,most notably high level of creatine phosphokinase and myoglobin,and myoglobi-nuria,which is often complicated with acute renal failure.It was reported that rhabdomyolysis could be associated with many viral encephalidities,the clinician should pay attention to this condition because it was not rare especially,when hematuria appearred in the course of viral encephalidities,serum creatine phosphate kinase,serum and urine myohemoglobin should be detected to identify whether rhabdomyolysis was existed.Once the diagnosis was confirmed,it should be treated with fluid administration and basification in order to avoid acute renal failure,and to improve prognosis on these patients.This study reviewed the literature on viral encephalidities and rhabdomyolysis.

Objective To observe the central nervous system(CNS)damage in children with mycoplasma pneumoniae pneumonia(MPP)and explore its mechanism.Methods A total of 325 cases of MPP were selected to investigate the incidence of CNS damage,and the levels of IL-8,IL-18 and soluble interleukin-2 receptor(sIL-2R)in both serum and cerebrospinal fluid(CSF)were detected in those patients with CNS complications.Children with viral encephalitis at hospital during the same period were taken as control group.Use SPSS 12.0 software to analyze the data.Results There were 22 cases(6.8%)of MPP who had CNS complications,presented mainly with fever,vomiting,headache and convulsion.The levels of IL-8,IL-18 and sIL-2R were higher in MPP patients who had CNS complications than those in control group,especially the level of IL-18 and sIL-2R in CSF(Pa

Child ; Electroencephalography ; Humans ; Male ; Seizures ; diagnosis ; Status Epilepticus ; diagnosis ; Time Factors

Abdominal Muscles ; physiology ; Abdominal Pain ; diagnosis ; physiopathology ; Animals ; Animals, Newborn ; Colon ; innervation ; Electrodes ; Electromyography ; Female ; Pain Measurement ; methods ; Pain Threshold ; physiology ; Rats ; Rats, Sprague-Dawley ; Viscera ; Visceral Afferents ; physiology

Objective To investigate the feasibility,safety and clinical efficacy of transvaginal myomectomy.Methods A total of 92 patients with uterine leiomyoma were given either vaginal myomectomy(Study Group,n=46) or abdominal myomectomy(Control Group,n=46).Clinical outcomes between the two groups were compared.Results Both vaginal and abdominal myomectomy were performed successfully.The operation time between the two groups was not statistically significant(t=-0.734,P=0.465).There were significant differences between the Study Group and the Control Group in the intraoperative blood loss(60.4(?5.6 ml) vs 82.5?50.2 ml;t=-2.210,P=0.000),the time to first passing flatus(15.3?3.2 h vs 27.5?4.8 h;(t=-14.343,)P=0.030),the incidence of postoperative pain (?~2=29.447,P=0.000),the rate of postoperative pyrexia(?~2=3.903,P=0.048),and the hospital stay(3.1?0.4 d vs 5.2?1.1 d;t=-12.169,P=0.000).Conclusions Transvaginal myomectomy has advantages of little invasion,quick recovery of bowel movement,slight postoperative pain,low rate of postoperative pyrexia,and short hospital stay,being a safe and feasible minimally invasive option for uterine leiomyoma.

Objective To evaluate the application value of the blood culture combined with the detection of serum procalcitonin and C-reactive protein(CRP)in diagnosing infectious fever patients.Methods The PCT and CRP detection results on the blood sampling day in 126 cases of fever with positive blood culture and 123 cases of fever with negative blood culture in the emergency department were retrospectively analyzed,and the two sets of data were compared and statistically analyzed by the SPSS 16.0 soft-ware.Results The positive rates of CRP and PCT in 126 cases of positive blood culture were 100% and 100%,the detection values were 26.9-256.8 and 0.25-98.6,the positive rates of CRP and PCT in 123 cases of negative blood culture 95.5% and 15.4% re-spectively,the detection values were 1 .2-126.8 and 0.02-0.98.The PCT and CRP detection values in the positive blood culture group were significantly higher than those in the negative blood culture group,the difference was statistically significant(P <0.01). Conclusion PCT and CRP can be served as the monitoring indicators for blood bacterial infections,the blood culture combined with PCT and CRP detection has the guidance significance for early diagnosing bacterial infection.

Objective:To explore the cooradinative training model of postgraduate and and residency of nuclear medicine based on the ability promotion. Develop the learning of basic medical imaging knowledge, the training of clinical practice, the development of scientific research ability and the training of new technology and so on.Methods: Bibliometric analysis was used to analysis the domestic and overseas current situation and research hotspot about carrying out the training of clinical medicine and residency. Combing the existing problem and combined the characteristic of medical imaging, a training model based on ability enhancements be proposed and supporting system is constructed.Results:Search on the Wanfang Database, 170 literatures were obtained from 2007 to 2016 about training of postgraduates and residents of clinical medicine. The annual distribution was increased gradually, the articles number in 2016 was 4.3 times than in 2007. The research hotspots focus on the integration of medical postgraduate student and resident, clinical ability and cultivation of scientific research thinking ability , the penetration of new technology and the choices of research topics. Literature review shows the postgraduates of medical imaging faced the deficiency of anatomy and radiology knowledge, the capacity for scientific research, the training of new radiology technology. Proposed nuclear medicine postgraduate students and residency training cooradinative transformation of the new model and developed a corresponding training curriculum training system.Conclusion: Based on the background of capacity enhancement, the new model of postgraduate and clinicians training mechanism, the operation of collaborative transformation model, reasonable arrangements for the training and scientific research, the focused training, these methods could effectively satisfied both training needs. In order to develop the high-quality talent with both clinical experience and scientific research ability.