Myasthenia gravis(MG)is an acquired autoimmune disease,which is mediated by nicotinic acetylcholine receptor(AChR)antibody,depends on cellular immunity and involves some complements.It mainly affects AChR on the postsynaptic membrane at the neuromuscular junction(NMJ).Various therapeutic methods have been used in the treatment of MG,but current therapeutic methods can not do well when used alone,and most current drugs have major side effects due to immunosuppression,We expect that novel therapies be discovered.

Objective To investigate the effects of preeclampsia serum on activity and invasive ability of cultured cytotrophoblasts of first trimester of pregnancy. Methods Cytotrophoblasts of normal 6 to 8-week pregnancy were cultured by tissue explants adherent method,and were incubated with serum of women with normal pregnancy(normal group)and preeclampsia(preeclampsia group),respectively for 24 h.The activity of cytotrophoblasts was examined by CCK-8,invasive ability was determined by Transwell invasion assay,and expression of MMP-2,MMP-9 and PAI-1 mRNA was detected by reverse transcription-polymerase chain reaction(RT-PCR). Results The activity and invasive ability of cytotrophoblasts in preeclampsia group were lower than those in normal group(P<0.05,P<0.01).Compared with normal group,the expression of MMP-2 and MMP-9 mRNA of cytotrophoblasts was significantly lower(P<0.01),and the expression of PAI-1 mRNA was significantly higher(P<0.01).In both groups,the expression of MMP-2 mRNA was negatively related to that of PAI-1 mRNA(r=-0.985,P<0.01;r=-0.933,P<0.05),while there was no correlationship between the expression of MMP-9 mRNA and that of PAI-1 mRNA. Conclusion The preeclampsia serum may affect the invasive ability of cytotrophoblasts by regulating the expression of MMP-2,MMP-9 and PAI-1.

Objective To explore the change of the red blood cell(RBC) immunoadhensive function in children with asthma and the effect of glucocorticoid on RBC immunoadhensive function.Methods The rosette rate of RBC-C3b receptor(RBC-C3bRR) and rosette rate of RBC-Immunocomplex(RBC-ICR) were measured by using yeast rosette method in 42 children with asthma,20 healthy children(control group),and 28 asthmatic children in remission period were measured also by the same methods after one month and six months of glucocorticoid inhalation therapy.Results The levels of RBC-C3bRR were lower in asthma group than that in remission group and control group(P0 05).Conclusions RBC immunoadhensive function has shown significant decrease in asthmatic children;and it may be improved by using glucocorticoid inhalation therapy in asthmatic children at remission period.

p53 gene is a 16-20 kb of cellular DNA located on the short arm of human chromosome 17 at position 17pl3.1. This gene encodes a 393-amino acid nuclear phosphoprotein which involves in the regulation of cell proliferation. Loss of normal p53 function is associated with the cell transformation in vitro and the development of neoplasms in vivo. More than one-half of human malignancies were shown to contain an altered p53 gene. Most p53 gene alterations are the missense mutations, giving rise to an altered protein. The inactivation of wild-type p53 is currently regarded as an important genetic pathway for haman carcinogenesis generated by endogenous factors and exogenous carcinogens, as well as several tumor viruses. To gain more insight into the functional role of wild-type p53 in human colo-rectal carcinoma, a 2. 1 kilobase human wild-type p53 cDNA with 5' and 3' untranslated sequences was cloned into the BamHI site of pREP9 (episomal mammalian expression vector) in sense orientation. We performed experiments to transfer wild-type p53 into human colon adenocarcinoma cell line (SW1116) harboring mutant p53 genes with electroporation method. We assessed G4I8-resistant clonal growth, cell growth properties and cell cycle pattern by flow cytometry. The results demonstrated that human wild type p53 gene can suppress the phenotype of SW1116 cell line. So gene therapy based on restoration of the defective or mutant p53 function plays an important role in colo-rectal cancer treatment.

Objective To study the dynamic changes and clinical significance of D-D, t-PA and PAI in patients with acute renal failure during the process of different methods of blood purification. Methods Thirty-seven ARF patients were divided into three groups: HD group, HDF group and HF group. Plasma D-D level, t-PA and PAI activity were determined 1 hour, 4 hours before and after treatment. Normal control group consisted of fourteen healthy people. Results ① Plasma D-D level and PAI activity in ARF patients were obviously higher than those in control group, while t-PA activity was lower(P0.05). ③ After 4 hours of the treatment, compared with HD group, HDF and HF groups had significant difference in plasma D-D level, t-PA and PAI activity(P

Objective To evaluate the efficacy and security of one-stop hybrid cardiac surgery for the treatment of elderly patients with complex heart disease.Methods From November 2013 to March 2014,a total of 5 patients[4 male,age:71-78years] underwent one-stop hybrid approach in the hybrid operating room with chronic obstructive pulmonary disease (COPD) in 3 cases,2 cases of diabetes,3 cases of hypertension,valvular heart disease in 3 cases,PDA in 1 case,4 patients with multivessel coronary disease.Right minimally invasive cardiac surgery(coronary artery bypass grafting or valvular surgery) and percutaneous intervention were performed in an enhanced operative unit.The efficacy and security of one-stop hybrid cardiac surgery were evaluated after the procedure.Results The one-stop hybrid procedure was successful in all patients.Operation time was (125 ± 28) minutes,CPI time was (65 ± 33) minutes,CPB time was (60 ± 23) minutes,Aortic cross clamping time was (42 ± 18) minutes,postoperative mechanical ventilation time was (20.5 ±6.5)hours and ICU monitoring time was (68.9 ± 16.6)hours.Hospitalization time was (9.8 ± 3.7) days.Patients remained free from angina,prosthetic valve dysfunction and patent ductus arteriosus recanalisation(rang 1 to 5 months) follow-up period.Conclusion One-stop hybrid cardiac surgery provides a reasonable,feasible and safe alternative for treating elderly patients with complex heart disease.

Subcortical ischemic vascular disease (SIVD) is considered to be the most important and common cause of vascular cognitive impairment (VCI). If patients with subcortical ischemic vascular cognitive impairment (SIVCI) and subcortical vascular cognitive impairment (sVCI) can be found early, it is possible that vascular dementia (VaD) can be identified before occurrence and even reverse the process. Recent studies have shown that resting-state functional magnetic resonance imaging (rsfMRI) may provide the objective basis for the diagnosis of SIVCI. This article reviews the application of rsfMRI in the diagnosis of SIVCI.

Objective To understand the trend and epidemiologic characteristics of malaria prevalence so as to provide the evidence for further control of the disease in Liaoning Province. Methods The data of registered cases of malaria in Liaoning Province from 2008 to 2013 were collected and analyzed with the descriptive epidemiological methods. Results A total of 202 ma-laria cases were reported from 2008 to 2013. There was no epidemic outbreak ,and the average annual incidence was 0.08/100 000. Totally 17 P. v. cases of local infection were reported,and 185 imported malaria cases were reported(P.v. 33 cases,P.f. 113 cases,P.v.&P.f. 13 cases,P.o. 3 cases,and unspecified 23 cases). The ratio of male to female was 5.91:1,the populations aged 31-45 years were the most(47.52%),and the main occupation was exported labors(46.04%). The 179 imported cases were infected in Africa and Southeast Asia,6 imported cases were infected in Anhui Province,Yunnan Province and Hongkong,and 16 local cases were infected in the border area of Dandong City. Conclusions Although the annual incidence of malaria in Liaon-ing Province is lower than 1/10 000,the incidence shows an increasing trend because the exported labors are increased. There-fore,the epidemic monitoring and health education should be strengthened,especially for the exported labors who have returned.

Objective To investigate the trends in and characteristics of syphilis epidemiology in China,and to provide a scientific basis for the development of control strategies.Methods An epidemiological study was performed on syphilis cases reported from 31 provinces,autonomous regions and municipalities between 2000 and 2013.Results The reported syphilis incidence increased yearly from 6.43 per 100 000 person-years in 2000 to 32.86 per 100 000 person-years in 2013,with an average annual growth rate of 13.37％.Syphilis was reported in most (99％) counties/districts in China mainland except for a few remote mountain areas,with a significant difference in the incidence of syphilis between different regions.The regions with a high incidence of syphilis included minority areas in Northwest China (Xinjiang,Qinghai and Ningxia),Minjiang River area,Yangtze River Delta (Zhejiang,Shanghai),Zhujiang River Delta (Guangxi,Guangdong),etc.There had been a rapid increase in the incidence of syphilis in some regions previously reported to have a low incidence (such as Guizhou,Shaanxi,Henan,etc).Among the reported cases,female patients predominated with an average male/female ratio of 0.92 ∶ 1.The incidence of syphilis was highest in the age group of 20-39 years,but increased yearly by more than 30％ in the population aged ＞ 60 years.Of 20 occupations,peasant workers accounted for the highest proportion (31.56％) of syphilis cases,and retired population showed the most rapid increase by about 27.35％ per year.The constituent ratio of primary and secondary syphilis in all the syphilis cases had declined yearly,while that of latent syphilis increased by more than 50％ after 2010.Conclusions Syphilis remains a major public health issue in China,and measures based on the epidemiological features are urgently needed to effectively control epidemic syphilis.

Objective To investigate the effects of preoperative parecoxib on the levels of inter-leukin 6 (IL-6)and postoperative analgesia for breast surgery.Methods Sixty breast cancer patients undergoing mastectomy were randomly divided into two groups:parecoxib group (group P)and con-trol group (group C),n=30 in each group.All patients received sevoflurane and fentanyl anesthesia. Group P was injected parecoxib 40 mg at 10 minutes before induction of anesthesia,meanwhile group C was injected saline 5 ml.All patients received postoperative patient-controlled intravenous analgesia (PCIA)with fentanyl.VAS scores for pain were assessed at postoperative 2,4,8,12,24 hours. The serum levels of IL-6 were measured by ELISA at 10 minutes before induction,4 h,8 h,and 24 h after surgery.Results Group P had lower VAS scores than group C at 2-12 h after surgery (P <0.05).Compared with 10 minutes before induction,the levels of IL-6 increased significantly at post-operative 4,8,24 h in two groups (P<0.01),while group P had lower levels of IL-6 than group C (P <0.01).Conclusion Preoperative administration of parecoxib has a stronger analgesic effect in breast cancer patients after mastectomy,and decreases the levels of IL-6.