Animals ; Herpesviridae ; genetics ; metabolism ; Humans ; Viral Proteins ; chemistry ; genetics ; metabolism

Objective To investigate the impact of hypoxia on the expression of early growth response-1 (Egr-1) and monocyte chemoattractant protein-1 (MCP-1) in mouse aorta,and to probe the underlying mechanism involving receptor for advanced glycation end-products (RAGE).Methods 3-month-old C57BL/6 mice were subjected to hypoxia [(6.0±0.5) ％ oxygen] to establish the global hypoxia model(n=6 rats for each).Aortas were dissected,Egr-1 mRNA and MCP-1 mRNA were detected by real time RT-PCR,Egr-1 and RAGE proteins were tested by Western blot,and Egr-1 DNA binding activity was assayed by electrophoretic mobility shift assay (EMSA).For blockade of RAGE,mice were pretreated with soluble RAGE (sRAGE) for 1 h by intra-peritoneal injection before they were exposed to hypoxia.Mice with normoxia were used as controls.Results After 30 minutes of hypoxic exposure,Egr-1 mRNA in aorta was increased to (28.3±0.9)folds compared with normoxic controls (F=617.17,P＜0.01),and the induction persisted for at least 3 hours.After 45 minutes of hypoxic exposure,Egr-1 proteins in aorta was increased to (5.7 ± 0.3) folds compared with normoxic controls (F =57.18,P＜ 0.01); the enhanced DNA binding activity of Egr-1 by hypoxia was attenuated by pretreatment with anti-Egr-1 lgG.After 4 hours of hypoxic exposure,MCP-1 mRNA expression in aorta was increased to(4.0±0.3)folds compared with normoxic controls (F=30.68,P＜0.01).RAGE antigen was increased significantly within 30 minutes of hypoxic exposure,with the peak at 15 minutes; hypoxia-induced Egr-1 mRNA expression was significantly attenuated by pretreatment with sRAGE (3.3 ± 0.2) folds compared with normoxic controls (F =30.20,P＜0.01).Conclusions Hypoxia significantly induces Egr-1 and MCP-1 upregulation expressions in mouse aorta,and blockade of RAGE significantly attenuates hypoxia-induced Egr-1 expression.Thcsc findings suggest RAGE signaling is involved in hypoxia-induced vascular inflammatory stress,and highlight this receptor as a potential therapeutic target to protect tissues injured by hypoxia.

Objective To discuss causes and corresponding prevention for groin pain occurred early after total hip arthroplasty(THA).Methods A retrospective study was done on 189 cases(193 hips)treated with THA including unilateral procedures in 185 hips and bilateral procedures in eight hips to analyze common causes for early groin pain.Results Groin pain was found in 9.3% hips(18/ 193)during hospital stay,including 1.6%(3 cases)with deep infection,1.6%(3 cases)with incision infection,1%(2 cases)with posterior dislocation,4.1%(8 cases)with leg lengthening and 1%(2 cases)with hematoma.Conclusions Despite of the numerous diagnostic alternatives available to the orthopedic surgeon,detailed history,careful physical examination,necessary laboratory and imaging stud- ies can contribute to a correct determination of causes for groin pain.Meanwhile,appropriate indication, accurate preoperative radiographic measurement,intraoperative standardized surgical procedures and per- fect rehabilitation are necessary to avoid complications.

Objective To study the antitumor effect of toremifene on MCF7 cell lines,and investigate the role of mitogen-activated protein kinase pathway. Methods Inhibitory effect of toremifene alone or combined with MEK inhibitor PD98059 on MCF7 cells was measured by SRB test,and that on phosphorylated ERK was detected by Western blotting.Results Toremifene exhibited a concentration-dependent inhibitory effect on the activity of MCF7 cells.Phosphorylated ERK was significantly inhibited by 5,10 and 20 mmol/L toremifene.Combined with PD98059,toremifene had a significantly enhanced cytotoxity effect,which exceeded that of application alone. Conclusion Mitogen-activated protein kinase pathway may play an important role in the antitumor effect of toremifene which is independent of estrogens.Combined with PD98059,the antitumor effect of toremifene can be reinforced,indicating a synergistic effect of these two drugs.

Objective To investigate the effects of early rehabilitative training program on patients with acute myocardial infarction(AMI).Methods One hundred and twenty-two patients with AMI were randomly divided into early rehabilitation group(n=62)and control group(n=60).In addition to routine treatment,patients in rehabilitation group received early rehabilitative training mainly by walking exercise for two weeks.Results There were no significant differences in ventricular arrhythmia(Lown≥Ⅲ), extension of infarction and heart rate variability(HRV)between the two groups(P＞0.05).Forty of 62 patients(64.5%)in rehabilitation group had their left ventricular ejection fraction(LVEF)more than or equal to 50% in the 3~(rd)～4~(th)week after admission,significantly higher than that in control group(45.0%, 27/60 ;P＜0.01 ).By the end of the 4~(th)week after admission,25.8% of the patients in rehabilitation group showed positive in treadmill test,significantly lower than that in control group(38.3%,P＜0.01). Occurrence of angina pectoris and reinfarction and fatality in rehabilitation group were significantly lower than those in control group(P＜0.05)during their hospitalization and follow-up period.Patients in rehabilitation group stayed at hospital for(16?3)days in average,significantly less than that in control group[(27?4) days],with statistically significant difference(P＜0.05).Conclusion Early rehabilitative training for patients with uncomplicated AMI is not only safe and feasible,but also useful in improvement for their prognosis and quality of life.

Objective To summarize the management of scrotal gangrene.Methods Totally,14 male patients (mean age,48 years;age range,27-74 years) with scrotal gangrene were treated from August 2003 to June 2005.Among these patients,scrotal gangrene was complicated by perianal and penile gangrene in 2 cases;by perianal,penile and inguinal gangrene in 10 cases;by perianal,penile,inguinal gangrene and abdominal subcutaneous gangrene in 2 cases.Three cases had concomitantly necrosis of the penis;and 5 ca- ses,orchitis.Bacterial cultures were performed in all 14 cases with the positive results.All patients underwent surgical treatment,including PhaseⅠincisions,aggressive debridement,drainage,irrigation,and scrotoplas- ty.After operation they received antibiotic therapy and supporting treatment.Three cases of penile necrosis underwent complete penis amputation and transplanting the urethra before the anus.Five cases of orchitis un- derwent unilateral orchiectomy.Two cases of abdominal gangrene underwent surgical subcutaneous treatment, including incision,aggressive debridement,drainage,and irrigation.Results Twelve cases undergoing scrotoplasty achieved PhaseⅠhealing.Two cases undergoing urethral fistulation recovered well.Ten cases of penile skin gangrene received penile dermatoplasty 1 month later,and then recovered.Two cases who had al- ready had AIDS died 2 or 3 d after operation.Conclusions The management of scrotal gangrene primarily consists of early and aggressive debridement,antibiotic therapy and supporting treatment.The PhaseⅠde- bridement and scrotoplasty as well as drainage are effective for the treatment of scrotal gangrene.

Objective To explore the changes of contents of glutamate (Glu) and aspartate (Asp) in hippocampus formation and cerebrospinal fluid (CSF) in kainite acid(KA) induced epilepsy rats.Methods SD rats(n=40) were divided into 2 groups randomly:the KA group [intracerebroventricular injection(icv) of KA, 2 ?g/kg] and control group(icv of NS). KA group were divided into 4 groups at 6 h,1,3 and 7 d,each group 8 rats.High pressure liquid chromatgraphy(HPLC) was used to assess the concentrations of Glu and Asp in hippocampus formation and CSF.Results In the hippocampus, the contents of Glu and Asp increased continuously 1 d after seizure , but not different from those of control group.Three days later, only Glu became significantly different from control group. However, the contents of Glu and Asp in the CSF were significantly different from the control 6 h after seizure.Conclusion The contents of excite amino acid (especially Glu)in CSF increase immediately after KA injection, which are earlier than those in hippocampus formation.

Objective To evaluate the conventional ultrasound (US) and contrast-enhanced ultrasound (CEUS) in diagnosis of splenic trauma including its grading diagnosis. Methods US and CEUS in 42 patients with splenic trauma confirmed by CT and/or operation were performed during 9.2004-10.2007. All the data were compared and analyzed retrospectively. Results Of 42 patients with splenic trauma, 28 cases were detected and 14 cases were missed on US examination, whereas, 40 cases were detected and only 2 mild cases were missed on CEUS examination. The detection rate of lesions with CEUS was significantly higher than that of US (P<0.001) . Ten cases in grading the injury were underestimated by US, however, none of them were underestimated by CEUS. CEUS had good concordance with CT and/or operation in grading diagnosis of 42 cases except two mild cases. Conclusions CEUS has very good concordance with CT and/or operation in detecting injury and grading the splenic trauma compared with conventional US. CEUS as a new imaging technology has made great advance of ultrasoongraphy in evaluation of splenic trauma including injury grading,and it is very useful in clinical application.

Objective:To know the effect of counseling on personality feature and self-conscious symptom of college students with internet addiction disorder (IAD).Methods:Before and after counseling,38 students with IAD in Guangdong Medical College (GDMC)were measured by Sixteen Personality Factor Questionnaire (16PF)and Symptom Check List 90 (SCL-90).Results:After counseling,these students with IAD had higher scores of 4 factors in 16PF(sociability,intelligence,perseverance,autonomy),had lowerer scores of 5 factors in 16PF (daring,suspicion,illusion,anxiety,tensity),and had lower scores of 6 factors in SCL-90 (force,interpersonal sensitivity,depression,anxiety,hostility,terror)(P＜0.05 or P＜0.01).Conclusion:To college students with IAD, counseling could enhance their positive personality features,weaken their negative personality feature and mitigate their self- conscious symptom.