Selective serotonin reuptake inhibitors (SSRIs),a new generation of anti-depressant agent,are mainly used to treat emotional disorders in clinical practice now.Recent studies have found that SSRIs can increase neurogenesis after cerebral ischemia,promote neurovascular reconstruction,and are conducive to the recovery of neurological function.Furthermore,SSRIs can improve the tolerance of ischemic tissue,exert anti-inflammation and anti-oxidation properties,reduce the blood-brain-barrier injury,and inhibit excitatory amino acid toxicity in order to exert neuroprotective effect.This article reviews the related research progress in SSRIs and ischemic stroke.

In the past, the ways to amblyopia neural mechanism research are given priority to visual electrophysiology and so on, which express the result use two -dimensional form, these ways mainly research the functions of the state before the lateral geniculate body. For the study of optic center, animal models are used to research it. But these kinds of methods are unable to accurately detect amblyopia neural mechanisms of human beings. Vulnerable to a variety of factors, it is difficult to finish the amblyopia treatment effect evaluation. Functional magnetic resonance imaging ( fMRI ) can reflect the three-dimensional visual cortex neuron activity noninvasively and accurately, and give rise to amblyopia neural mechanism and therapeutic effect evaluation. Therefore, in this paper, the amblyopia neural mechanisms and visual center after treatment effect evaluation of fMRI research progress are summarized.

Pituitary stalk interruption syndrome(PSIS) is a rare disease characterized by different degrees of anterior pituitary hormone deficiency.The typical imaging finding is a thin or absent pituitary stalk,often associated with an ectopic posterior pituitary and a hypoplastic anterior pituitary.The cause is still unkown.Dynamic contrastenhanced MRI helps to confirm the diagnosis.Replacement of multiple anterior pituitary hormones is the key of the treatment.Doctors should have a thorough understanding of the disease and give patients efficacious treatment and a better prognosis would be obtained.

Objective To investigate the possibility of commitment differentiation of embryonic stem cells induced by the medium of cultured retinal neurons of SD rats. Methods The medium from cultured retinal neurons of SD rats were collected, sterilized and mixed with DMEM medium according to 2∶3 proportion, ES cells were cultured with these mixed medium and were observed under the phase contrast microscope daily, the induced cells were identified by NF immunohistochemistry methods. Results The ES cells cultured with these mixed medium can differentiate into neuron like structure, and the induced cells were positive in NF immunofluorescence staining. Conclusion The medium from cultured retinal neurons of SD rats can induce ES cells commitment differentiation into neuron like structure.

Objective To study the effects of costimulatory blockade with anti-inducible costim- ulator antibody(ICOS mAb)in combination with CTLA4Ig on prevention of islet allograft rejection. Methods Experimental animals were randomly divided into 4 groups(10 rats in each group).CT- LA4Ig + ICOS mAb group(group A):intraperitoneal injection of CTLA4Ig on day 0,2,4 and ICOS mAb on day 1,3,5 after islet transplantation;ICOSmAb group(group B):intraperitoneal injection of ICOS mAb on day 1,3,5 after islet transplantation;CTLA4Ig group(group C):intraperitoneal injection of CTLA4Ig on day 0,2,4 after islet transplantation;control group(group D):simple islet transplantation.The islet allograft survival and pathological changes in the transplanted islets after transplantation were observed.By using RT-PCR,the expression of IL-2 and IL-10 mRNA in the transplanted islets was detected.The expression of CD4~+ and CD8~+ T cell was detected by flow cy- tometry.Results In group A,the survival time was obviously prolonged as compared with other three groups and the transplanted islets were near normal under a light microscope.As compared with other three groups,the expression of IL-2 mRNA was significantly decreased in group A(P0.05).The expression of CD4~+ and CD8~+ T cell was not obviously up-regulated on the day 21 after transplantation.Conclusion The blockade of costimulatory signals with ICOS mAb in combination with CTLA4Ig has a favorable effects to restrain the rejection of islet transplantation.

Objective To study the association of ubiquitin carboxyl-terminal hydrolase L1 (UCHL1) promoter region methylation with human esophageal cancer. Methods Promoter region methylation of UCHL1 was dctcctcd by rnethylation specific PCR (MSP) in esophageal cancer cell lines and tissue samples.The expression of UCHL1 was detected by semi-quantitative RT-PCR and Western blot in esophagcal cancer cell lines.5-Aza-2'-deoxycytidine (5-Aza) was applied to reactivate methylated cell lines.ResultsComplete methylation of UCHL1 promoter region was detected in 8 cell lincs (KYSE30,KYSE150,KYSE140,KYSE450,KYSE510,TE3,TE7,TE10).Loss of UCHL1 expression was found in7 cell lines ( KYSE30,KYSE150,KYSE140,KYSE450,KYSE510,TE3,TE7).Reduced expression was found in TE10 cell line. Promoter region hypermethylation was correlated with UCHL1 expression in esophageal cancer cell lines.Re-expression of UCHL1 was induced by 5-Aza treatment in KYSE150 and TE3 cell lines.UCHL1 was frequently methylated in human primary esophageal cancer (74.51％,38/51 ),while no methylation was detected in normal esophageal mucosa (0/10). No association was found between promoter region methylation and age,gender,tumor location,tumor stage or lymph node metastasis.Conclusions UCHL1is silenced by promoter region hypermethylation in human esophageal cancer.Methylation of UCHL1 is frequently happened to primary esophageal cancer and may play an important role in the tumorigenesis.

Autophagy is induced by a variety of signals during ischemia and reperfusion.Autophagy has been shown to protect cardiac cells and to reduce the cell loss,but it also has been shown that enhanced autophagy contributes to cell death during I/R.

Objective To describe the disease's spectrum of fever patients,especially to analyze the epidemic characterization of infectious diseases,to offer the proof for fever department in screening of infectious diseases.Methods A total of 15081 patients were analyed for patients presenting to the Infectious Diseases Department,People's Hospital,Peking University,between June 2005 to May 2006.A retrospective study was used to analyze the disease's spectrum and epidemic characterization.Results Among the disease's spectrum of fever patients,the first leading cause was respiratory diseases(78.22%),followed by infection with the special patients(10.50%)、acute gastroenteritis(3.57%)、the infection at other site with etiological factor determined(2.82%)、infectious diseases(2.30%)、urinary system infection(2.06%) and fever of unknown origin(0.53%),respectively;Among the spectrum of infectious diseases,the first leading cause was infectious diarrheal disease(29.97%),followed by measles(24.78%)、lung tuberculosis(11.24%).Conclusion The spectrum of fever is complex.To obtain the epidemic characterization of infectious diseases,it's helpful to the fever department to screen and prevent the infectious diseases.

0.05).Conclusion The application of clinical pathway on patients with ischemic stroke can improve the quality of medical care with reasonable cost,and it deserves to be used more widely.

Objective The relationship between XbaI polymorphism of ApoB gene and cerebral infarction(CI)among Chinese population was assessed by Meta-analysis.Methods All related case-control studies were collected from all publications,the relevant studies were identified after eliminating those poor-qualified studies.Meta-analysis was conducted for investigating heterogeneity among individual studies,and summarizing the effects across studies.Results The combined data statistics revealed the frequencies of the X-X+/X+X+ genotypes showed no statistically difference(Z=1.72,P=0.08).Through the subgroup analysis,it was obviously increase the risk of CI in Chinese northern population(OR=2.66,95%CI:1.67~4.24),but no statistically difference in Chinese southern population(OR=1.26,95%CI:0.90~1.77).Conclusions ApoB gene XbaI polymorphism may be significantly associated with susceptibility of CI in Chinese northern population,but not a definite risk for Chinese southern population.