Activation-induced cytidine deaminase (AID) involved in the regulation of B cell immune senescence / 细胞与分子免疫学杂志

The humoral immune response of B cells is the key to the protection of specific immunity, and immune aging reshapes its production and function. The decreased B cell immune function is an indicator of immune senescence. The impaired humoral immune function mediated by antibody secreted by B cells leads to a decline in the response of elderly individuals to the vaccine. These people are therefore more susceptible to infection and deterioration, and have a higher incidence of tumors and metabolic diseases. Activation-induced cytidine deaminase (AID) is an enzyme that triggers immunoglobulin class conversion recombination (CSR) and somatic high frequency mutation (SHM). It decreases during immune senescence and is considered to be a biomarker of decreased B cell function in aging mice and humans. Understanding the inherent defects of B-cell immune senescence and the regulation mechanism of AID in the aging process can provide new research ideas for the susceptibility, prevention and treatment of diseases in the elderly.

The study of diffusion tensor imaging and serum α-synuclein onin evaluating the Parkinson’s disease patients with cognitive impairment / 中风与神经疾病杂志

@#Objective　To investigate the changes of serum α-synuclein and white matter structure in Parkinson’s disease patients with different status of cognitive impairment,and to explore the relationship between α-synuclein,changes of white matter structure and cognitive impairment in Parkinson’s disease.Methods 　Sixty patients with Parkinson’s disease were selected and divided into 3 groups according to their cognitive function:the normal cognitive group (PD-N),mild cognitive impairment group (PD-MCI) and dementia group (PDD).Patients with cognitive impairment were assessed with the MMSE and the MoCA.All cases were scanned with routine MRI sequence and diffusion tensor imaging (DTI) sequence.Fractional anisotropy (FA) were measured.The serum levels of α-synuclein were measured by ELISA.Results　The FA values of right temporal lobe,right cingulate posterior bundle,the genu of corpus callosum in PD-M CI group were lower than that in PD-N group (all P<0.05),the same findings were found regarding the FA values of left occipital lobe,left cingulate anterior bundle and the splenium of corpus callosum in the PDD group (all P<0.05).Analysis of logistic regression equation revealed that the genu of corpus callosum might be specific for the brain white matter;and so did left cingulate anterior bundle.The Spearman correlation analysis showed that there was a negative correlation between FA values of left frontal lobe and MoCA total score in PD patients,as well as right temporal lobe,left occipital lobe,left cingulate anterior bundle,right cingulate anterior bundle and the splenium of corpus callosum (all P<0.05),positively correlated between serum α-synuclein concentration and MoCA total score in PD patients (P<0.05).Conclusion　Diffusion tensor imaging might be valuable for the diagnosis of cognitive dysfunction in PD;and there might be a certain relationship between serum α-synuclein and cognitive impairment in Parkinson’s disease.

Effect of Dl-3-n-Butylphthalide Sequential Therapy on Acute Cerebral Infarction: A Report of 50 Cases / 医药导报

Objective To investigate the effect of Dl-3-n-butylphthalide on acute cerebral infarction.Methods In Department of Neurology in the Fifth Hospital of Wuhan from March 2013 to June 2014,100 cases of patients with first onset of acute cerebral infarction were recruited.The participants were divided into 2 groups (control group and treatment group) randomly,with 50 participants in each group.Besides general treatment,the patients of treatment group received intravenous injection of Dl-3-n-butylphthalide in acute phase and orally took soft capsule of Dl-3-n-butylphthalide in recovery phase.All the patients were followed up for 24 weeks.Neurological function and general cognition were assessed separately by national institute of health stroke scale (NIHSS),and mini mental state examination (MMSE) was applied to assess overall cognitive function.Results NHISS score was gradually decreased and MMSE score was increased in both groups.As compared with the control group,NIHSS score and MMSE score were changed significantly in the treatment group.From first onset to 24 weeks after treatment,NHISS score was decreased by 30％ in the control group and 44％ in the treatment group;MMSE score was increased by 17％ in the control group and 32％ in the treatment group.Conclusion Sequential therapy with Dl-3-n-butylphthalide improves neurological function and general cognition faster and more significant for patients with acute cerebral infarction.