Objective To identify whether the helper T lymphocyte 1 (Th1)/helper T lymphocyte 2 (Th2) of patients' serum and bronchoalveolar lavage fluid (BALF) at admission could represent the severity of idiopathic pulmonary fibrosis (IPF) and whether its change at six months could predict the progression of the disease.Methods Eighty-three patients with IPF were subjected to pulmonary function tests (PFFs),dyspnea scores,arterial blood gas analysis,six-minute walk test (6MWT) and high-resolution computed tomography (HRCT).The serum and BALF specimen of these patients were obtained as well as 20 control serum and 10 control BALF specimen.A total of 55 patients were followed up,and their BALF and serum levels of interferon γ (IFNγ) and IL-4 were detected by enzyme-linked immunoadsorbent assay (ELISA).The correlation between the IFNγ/IL-4 levels (at admission and the change of that at six months follow-up) and the clinical,physiological and image features in the IPF patients were analyzed.Results The baseline serum and BALF level of IFNγ/IL-4 (0.8 ± 0.3) in the IPF patients was lower than that in the control group (1.4 ± 0.2),which showed significant correlation with the course of disease,dyspnea scores,FEV1 ％,FVC％,TLC％,maximum desaturation,6MWD and CT-fib (all P values ＜ 0.05).The serum level of IFNγ/IL-4 showed positive correlation with CT-alv (r =0.340,P ＜ 0.01).During follow-up,no statistic difference was found in the serum levels of IFNγ,IL-4 and IFNγ/IL-4 between the IPF patients with or without glucocorticoids treatment.There were significant aggravation in the dyspnea scores,FEV1％,FVC％,CT-alv,CT-fib,IFNγ and IL-4 at six months follow-up.Significant correlation had been showed between the change of the serum IFNγ/IL-4 level with the changes of the dyspnea scores,FVC％,TLC％,DLCO％,6MWD and CT-fib in the IPF patients (P ＜0.05).Conclusions There are disequilibrium of the Th1/Th2 in the serum and the BALF of the IPF patients.The Th1/Th2 level could represent severity of the disease,and the serum level change of Th1/Th2 in the follow-up could predict the progression of the diseases in the IPF patients.

OBJECTIVE To discuss the role of head hygiene for nosocomial infection control in operating room.METHODS The head band was weared to improve head hygiene,and enhance the consciousness in control nosocomial infection.RESULTS From Mar 2004 to Mar 2006 there were 2534 cases operated and 23 cases suffered incision infection(0.91%) when surgeon was without use of head band;but from Mar 2004 to Mar 2006 there were 3014 cases operated and the incision infection rate was 0.40%(12 cases) when surgeon was with use of head band.It was an effective method for reducing sweat-inducing contamination by wearing head band to control nosocomial infection in operating room.CONCLUSIONS To improve the head hygiene by wearing head band is arelatively simple practice,it can control nosocomial infection in operating room.

Objective To study the effect of diet containing different proportions of porphyra powder on relieving constipation, volatile organic compounds and inhibiting intestinal E. coli. Method Mice were divided into 3 groups: blank group, 2 test groups. After the mice were allotted for different concentrations of porphyra powder diet for 30 d, the body weight of mice, water-holding capacity, the number and weight of feces within 24 h, the feces pH, E. coli counts and the first black defecating time were detected. The odorous compounds in feces were also measured by headspace solid phase microextraction coupled with GC-MS. Results Compared with the blank group, the water absorbed and number and weight of feces were significantly increased(P

Objective To investigate the effect of YTH domain family protein 2(YTHDF2)on an-giotensin Ⅱ(Ang Ⅱ)-induced hypertrophy and apoptosis of primary neonatal rat cardiomyocytes.Methods The expression level of YTHDF2 was detected in the primary neonatal rat cardiomyo-cytes with or without Ang Ⅱ stimulation(AngⅡ group and normal group).The cells were divid-ed into blank group(transfected with siRNA+PBS),siYTHDF2 group(transfected with siYTHDF2+PBS),model group(siRNA+Ang Ⅱ)and experimental group(siYTHDF2+Ang Ⅱ)to investi-gate the effects of silencing YTHDF2 on the hypertrophy and apoptosis of cardiomyocytes.West-ern blotting and RT-qPCR were used to detect the expression of YTHDF2 at protein and mRNA levels,and RT-qPCR was employed to measure the mRNA levels of myocardial hypertrophic related genes atrial natriuretic peptide(ANP),brain natriuretic peptide(BNP)and beta-myosin heavy chain(β-MHC),and cardiomyocyte apoptosis related genes Bax and B lymphocytoma 2 gene(Bcl-2).The surface area of cardiomyocytes was observed by α-actin immunofluorescence staining.Cardiomyocyte apoptosis was observed by TUNEL staining,and the binding relationship between YTHDF2 and Bcl-2 was verified by immunoprecipitation.Results The expression of YTHDF2 at protein and mRNA levels were significantly higher in the AngⅡ group than the nor-mal group(1.49±0.03 vs 0.97±0.09,1.50±0.08 vs 1.00±0.07,P＜0.05).Compared with the blank group,the surface area of cardiomyocytes was notably enlarged,apoptotic rate was obvi-ously increased,the mRNA levels of ANP,BNP,β-MHC and Bax were significantly increased,and that of Bcl-2 was remarkably decreased in the model group(P＜0.05).The experimental group obtained decreased surface area and apoptotic rate of cardiomyocytes,lower mRNA levels of ANP,BNP,β-MHC and Bax,and increased mRNA expression of Bcl-2(P＜0.05).Conclusion Silencing YTHDF2 can alleviate Ang Ⅱ-induced hypertrophy and apoptosis in primary neonatal rat cardiomyocyte,and YTHDF2 inhibits the expression of Bcl-2 by binding to it.