CD47 is a pluripotent molecule which plays a key role in the process of tumor immune escape.Blocking CD47 signal pathway can activate the macrophages to phagocytose tumor cells,which becomes a promising way for tumor immunotherapy.Monoclonal antibodies targeting CD47 have been the new focus during recent years.Present researches are carried out successfully,however it still needs more work before the clinical application of monoclonal antibodies targeting CD47.

Objective To study the effect of paeonol (PAE) and PNS on the expression of transforming growth factor (TGF)- beta 1/ Smad2/3 pathway in rats with acute myocardial infarction (AMI), and the possible molecular mechanism thereof. Methods Model of AMI was made using left anterior descending coronary branch ligation. According to the inter?vention methods rats were divided into model group, PAE group (8 mg·kg-1), PNS group (40 mg·kg-1), PAE (4 mg·kg-1)+PNS (20 mg·kg-1) low dose group, PAE (8 mg·kg-1)+PNS (40 mg·kg-1) high dose group and captopril positive control group (10 mg · kg-1). Rats without ligation were used as Sham operation group. Left ventricular systolic blood pressure (LVSP), left ventricular diastolic pressure (LVEDP) and the maximum rise and fall rate (/dtmax DP) were detected after 28-day treat?ment. HE staining was used to observe changes of myocardial tissue. The protein expression levels of TGF-β1 and Smad2/3 were detected by Western blot assay. Results There were significant differences in parameters used for detecting treatment group and model group, formula group and single drug group, formula high dose group and formula low dose group (P <0.01). The model group showed pathological changes. All treatment groups showed different degrees of pathological improve?ment. There was the most significant improvement in formulae group and captopril group. Compared with the model group, TGF-β1 and Smad2/3 protein expressions were decreased in treatment group. The expression levels of TGF-β1 and Smad2/3 were significantly decreased in formula group than those of PAE group and PNS group, and lower levels in formula high dose group than those of formula low dose group (P<0.05). Conclusion Paeonol and PNS can inhibit the expressions of TGF-β/Smad 2/3 protein in rats with AMI, by blocking TGF-β/Smad pathway.

Objective: To investigate constitutional and phys ical stamina status in soldiers with different adaption periods in Tibetan areas . Methods: Two hundred and eithty-two male soldiers from a barr acks at an elevation of 3 600 m were divided into 2 groups: the veteran group ( n=143) in Tibet for 1.45±0.22 year, and the recruit group (n=139) in Ti bet for 0.33±0.00 years. The test items included body weight, cirumference, st a nding long jump, chin-up, 100 m dash and 3 000 m jogging, all were evaluated ac cording to the national military standard, which were Comprehensive Evaluation o f Health in Troops, and Examination and Evaluation of the Physical Stamina of So ldiers. Results: The physical stamina indexes of both the vetera ns and the recruits were up to the national military norm on the whole, ranking as moderate. The veteran group showed no significant difference in standing long jump and 100 m dash,（P<0.05), but obvious lower level in chin-up and 3 00 0 m jogging（P<0.01）, compared with the national military norm. The recr ui t group showed significant lower level in chin-up, 100 m dash, 3 000 m jogging as compared with the national military norm（P<0.01）, and also significant lower level in chin-up and 3 000 m jogging （P<0.05 or P<0.01) as compa red with the veteran group. Conclusion: The physical stamina of both the veterans and the recruits meet the basic national military requirements , ranking as moderate. The soldiers who have been in service for over 1 year hav e better explosive force, but they need more tolerance and aerobic exercises. Th e newly recruited need more exercise to raise tolerance to the hypoxic environme nt in plateau areas so as to shorten the adaption time to high altitude.

Objective To study the effect of paeonol (PAE) and panax notoginseny saponins (PNS) on the expressions of collagenⅠandⅢprotein and mRNA in rats with acute myocardial infarction (AMI), and to explore the molecular mecha?nism of improving myocardial fibrosis. Methods The rat model of AMI was made using the left anterior descending coro?nary branch ligation.According to the intervention rats were divided into model group, PAE (8 mg/kg) group, PNS (40 mg/kg) group, PAE (4 mg/kg)+PNS (20 mg/kg) group, PAE (8 mg/kg)+PNS (40 mg/kg) group and captopril positive control group (10 mg/kg). Sham operation group, only wear line without ligation. The left ventricular mass index (LVMI) was detected after treatment for 28 d. Masson staining was used to observe changes of myocardial fibrosis. Western blot assay and RT-PCR technique were used to detect protein and mRNA expression levels of collagenⅠandⅢ. Results The values of LVMI were increased in model group compared with those of sham operation group and treatment groups. Compared with PAE group and PNS group, values of LVMI were significantly decreased in PAE (4 mg/kg)+PNS (20 mg/kg) group and PAE (8 mg/kg)+PNS (40 mg/kg) group. There was a more significant decrease in formula high dose group (P < 0.01). The model group showed pathological change. There were different degrees of improvement in pathological structure in all treatment groups, more sig?nificant improvement was found in formula low dose group, formula high dose group and captopril positive control group. There were different degrees of increase in expressions of collagenⅠandⅢprotein and mRNA in model group compared with those of sham operation group and treatment groups. Compared with PAE group and PNS group, the protein and mRNA expression levels of collagenⅠandⅢwere significantly decreased in formula low dose group and formula high dose group,more significant decreased was found in formula high dose group (P<0.05). Conclusion Compound of paeonol and PNS can improve myocardial fibrosis in myocardial infarction rats, which may be related with reduced expressions of collagenⅠandⅢprotein and mRNA.

BACKGROUND: Heme oxygenase-1 (HO-1) promotor region has a pair of dinucleotide(guanosine thymidine, GT) repeats with a lengthy polymorphism, also named microsatellite polymorphism. Experiments in vitro have shown that we can indirectly learn about the level of gene transcription by measuring the number of GT repeats.OBJECTIVE: To investigate if an association exists between restenosis after percutaneous coronary intervention(PCI) and microsatellite polymorphism in HO-1 gene promoter.DESIGN: A case-control study based on the observation of the patients with coronary heart disease after undergoing coronary stenting.SETTING: Wards of the department of cardiology of a university hospital.PARTICIPANTS: A total of 118 patients were admitted from April 1996 to May 2002 at the Department of Cardiology of the First Hospital of Peking University who underwent successful coronary stenting. Inclusion criteria: The patients with coronary heart disease who underwent coronary stent implantation for more than 3 months now came to perform coronary angiography in follow-up. Exclusion criteria: Angiography showed that the stenosis of lumen in diameter in the patients with coronary heart disease was less than 50%and the follow-up in angiography was less than three months. There were 92males and 26 females aged(62±10) years old and the informed consents were obtained. The patients were divided into two groups according to the criteria stipulated by American Heart,Lung and Blood Association: in-stent restenosis(68 cases) and non-restenosis (50 cases).METHODS: DNA of the peripheral blood was isolated from the whole blood. The length of GT repeat was confirmed by PCR amplification and Spreadex Gel electrophoresis. Selected samples were sequenced with Sanger's method.MAIN OUTCOME MEASURES: Microsatellite gene frequency of HO-1promoter and its relationship with restenosis RESULTS: Patients with GT repeats <25 GT in the HO-1 gene promoter on either allele had significantly less often restenosis than patients without (47.5% vs. 68.4% ,P<0.05). After controlling some possible confound ing factorsfor coronary heart diseases, multivariate analysis indicated that still there was a significant difference between the two groups in restenosis rate(odd ratio 0. 418,95% CI: 0. 197 to 0. 887,P<0.05).CONCLUSION: The present study indicated that short(GT) n repeats of HO-1 gene promoter is associated with reduced post-PCI restenosis, which suggests the genetic contribution to in-stent restenosis after stent implantation. It may have important meanings to prevent the occurrence of restenosis.

Objective To investigate the diagnostic value of serum Cystatin C and 24 h urine microalbumin quantitative exami-nation in the early gestational diabetes kidney.Methods Chose 110 cases of patients from 37 to 40 weeks during pregnancy with gestational diabetes.According to the GFR,patients were divided into GFR moderate decline group A (30 ml/min/1.73m2 ≤GFR<60ml/min/1.73m2 ,n=30),GFR mild decline group B (60 ml/min/1.73m2 ≤GFR<89 ml/min/1.73m2 ,n=42)and GFR normal group C (GFR≥90 ml/min/1.73 m2 ,n=38).Choose the same gestational weeks 40 healthy preg-nants cases as control group D.Statistics of four groups of serum Cys C,24 h urine microalbumin quantitative,serum urea and creatinine,then analize.Results The levels of serum cystatin C and urine microalbumin compared between each group respectively,the differences were statistically significant (F=31.209,34.698,P <0.01,respectively).The levels of blood u-rea and creatinine in group A when compared with the other groups,found that the difference was statistically significant (F=5.845,4.575,P <0.01,respectively).When comparing the levels of blood urea and creatinine among the groups B,C and D,there was no statistical difference of significance (P >0.05).There was positive correlation between levels serum Cys C and urine microalbumin in group A and B (r=0.756,0.725,t=5.209,4.835,P <0.01,respectively).The sensitivity of Cys C and urine microalbumin were 95.2% and 90.5%,sensitivity of the combination of Cys C and urine microalbumin was 100% (χ2 =8.24,7.08,P <0.05,respectively).Conclusion As sensitive indicators of gestational diabetes in the early renal damage stage,joint detection of Cys C and urine microalbumin is of great significance for diagnosis and monitoring of diabe-tes in the early renal damage stage.

Objective: To analyze liquid milk exposure of thiocyanate among Chinese population and preliminarily assess its health risk. Methods: A total of 2 059 raw milk samples were collected during 2013 and 2014 from 12 Chinese provinces, New Zealand and Netherlands. Farms were chosed according to the main sources of dairy companies, the distribution of farms and the yield of milk. Content of thiocyanate were detected by ion chromatography. Liquid milk consumption data were taken from Chinese beverage and alcoholic beverage consumption survey in 18 cities or counties in 9 provinces, including 16 775 subjects older than 3. A simple distribution model was used to estimate the exposure of thiocyanate from liquid milk. The tolerable daily intake (TDI) of thiocyanate was made 0.08 mg·kg^-1·d^-1. Then the exposures of different age groups were compared with TDI. Results: Finally, 1 331 samples out of 2 059 were detected to contain thiocyanate. The detection rate was 65%. The average concentration of thiocyanate was 2.11 mg/kg, with a range of 0.10-16.20 mg/kg. The general population's consumption of thiocyanate by drinking liquid milk was 0.001 mg · kg^-1 · d^-1, which was lower than TDI. The P₉₅ of general population and consumers were 0.009 mg · kg^-1 · d^-1 and 0.020 mg·kg ^-1·d^-1 respectively, which were also lower than TDI. Mean exposures of population aged 3-6, 7-12, 13-17, 18-59 as well as elderly aged 60 and above were 0.007, 0.003, 0.002, 0.001 and 0.001 mg · kg^-1·d^-1 respectively, which were all lower than TDI. Conclusion The results suggested that the health risk of thiocyanate exposure by drinking liquid milk among Chinese population was at a low level. However, milk products for children deserve more concern.

Objective:To clarify the role of Heat shock proteins (HSPs) on the cardiac function during acute myocardial infarction (AMI) after bone marrow cell implantation (BMT), we examined the expression of HSP32 and HSP70 in a rat model of myocardial infarction. Methods: Myocardial infarction model was induced in the inbred Lewis rats by left anterior descending artery ligation,and 5?10 6 of bone marrow mononuclear cells (BM MNCs) were injected into an ischemic zone. On days 1, 3, 7 and 14 post infarct, the differentiations of transplanted cells and the expressions of HSP32 and HSP70 were determined by immunofluorescence or RT-PCR. The cardiac function was evaluated by echocardiography. Results: Immunofluorescence microscopy of hearts from BMT group revealed that expressions of HSP32 and HSP70 were promoted within cardiomyocytes in the infarction zone and the peri infarct zone,and expressed within some transplanted bone marrow cells as well. RT-PCR also showed the mRNA expression levels of HSP32 and HSP70 in BMT group were significantly higher than those of the control group, peaked on day 3 post infarct (5.0 fold and 2.9 fold, respectively, P

Objective To observe the value of prenatal ultrasound measuring fetal cauda equina nerve parameters for diagnosing tethered cord syndrome(TCS).Methods Forty six fetuses with TCS(TCS group)and 591 healthy fetuses(control group)were retrospectively enrolled.The length,area and angle of cauda equina nerve were measured with prenatal ultrasound and compared between groups,and the value for diagnosing TCS was analyzed.Results Significant differences of the length,area and angle of fetal cauda equina nerve were found between groups(all P＜0.05),with the area under the curve for diagnosing TCS of 0.924,0.809 and 0.972,respectively.Conclusion Prenatal ultrasound measuring fetal cauda equina nerve parameters had high value for diagnosing TCS.

Objective Human milk of mothers with positive hepatitis B surface antigen (HBsAg) contains hepatitis B virus (HBV). However, breastfeeding does not increase the risk of mother-to-infant transmission of HBV. Previous investigations demonstrated that breast milk has a property of binding with HBsAg. This study aimed to identify the component in human milk that can bind to HBsAg. Methods This study was performed in Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School, from June 2015 to February 2017. Human milk samples from two postpartum women with negative HBV markers and two control samples of cow milk and goat milk were analyzed by Far-Western blot, in which highly purified recombinant yeast HBsAg was used to bind with whey proteins. Based on the results of mass-spectrum analysis, competition inhibition test was used to confirm the functioning component. Results Far-Western blot showed remarkable protein bands at the relative molecular weight of about 80 000 in both lanes of human milk, but none in the lane of cow or goat milk. Mass-spectrum analysis of the protein band indicated there were proteins sharing 28.4%-93.4% homology in amino acid sequences with five proteins with the highest homology to lactoferrin (93.4%). Further Far-Western blot with purified recombinant lactoferrin showed that lactoferrin could bind to the recombinant HBsAg. Competition inhibition test suggested that the purified recombinant lactoferrin inhibited the binding of HBsAg to its antibody in a dose-dependent manner. Conclusions This study confirms the capability of lactoferrin in human milk to combine with HBsAg, suggesting that lactoferrin can bind to HBV. Further study on whether lactoferrin can inhibit the infectivity of HBV would be valuable to clarify the reason for not increasing the risk of mother-to-infant transmission of HBV by breastfeeding.