Objective To observe the effect and the mechanisms of ferulic acid on radiationinduced damage of mice peripheral blood and bone marrow hematopoietic function.Methods Ninety-six mice were randomly divided into sham irradiation group,irradiation group,positive drug group and 10,30,90 mg·kg-1 ·d-1 ferulic acid group,16 mice per group.Mice were exposed to 3.5 Gy γ-rays 24 h after first drug taken.Then,mice were given drugs for 7 d after irradiation.White blood cells in peripheral blood of 10 mice per group were counted 2 d before irradiation and 3,7,10,15 and 22 days after irradiation.The bone narrow of the other six mice was taken to detect the micronuclei frequency of polychromatic erythrocyte,the hematopoietic progenitor cell colony formation capacity,Thbd and HMGB1 protein expressions in mice bone marrow on the seventh day after irradiation.Results Compared with the irradiation alone group,the treatment of mice with ferulic acid 90 mg· kg-1 · d-1 increased the number of white blood cells in peripheral blood at 3,10,15 and 22 d after irradiation (t =2.267,2.399,1.945,2.828,P ＜ 0.05).Treatment with mice with ferulic acid 90 mg· kg-1 · d 1 decreased the micronuclei rate of erythrocytes in irradiated bone marrow (t =4.013,P ＜ 0.05),increased the clone numbers of CFU-E,BFU-E and CFU-GM of hematopoietic progenitor cells (t =2.366,2.953,3.115,P ＜0.05),improved the relative expression of the Thbd protein in bone marrow and the HMGB1 protein in nuclear (t =17.75,23.39,P ＜ 0.01).Conclusions Ferulilc acid could protect the bone marrow hematopoietic of mice exposed to irradiation by regulating the expressions of Thbd and HMGB1 protein,and then accelerate the peripheral cells recovery.

Objective To observe the time dependent changes of pancreas and lung injury in mice acute pancrea-titis induced by caerulein,and compare the effects of mice acute pancreatitis model induced by different injection protocols of caerulein and lipopolysaccharides. Methods Acute pancreatitis were induced by different injection frequency of caerulein or caerulein combined with lipopolysaccharides, and plasma amylase activity was detected by starch-iodine colorimetry,and pancreas and lung injury severity was observed on paraffin section after HE stai-ning. Results The injury of pancreas and lung in mice acute pancreatitis induced by caerulein was most severe at 4 h, which began to repair at 24 h, and basically returned to normal at 5 d. 4 h after last injection, the amylase activity in CAE7 group and CAE9 group was higher than that in the control group(6 461±1 078 U/dl vs 3 093± 331 U/dl;6 821 ± 495 U/dl vs 3 093 ± 331 U/dl, all P<0.001), and CAE7+LPS group was higher than in CAE9 group[(8 912±465)U/dl vs (6 821±495)U/dl,P<0.001],the histological score in CAE7 group and CAE9 group was higher than that in the control group(4.750 ± 0.524 vs 0 ± 0; 4.917 ± 0.664 vs 0 ± 0, all P<0.001), and that in CAE7+LPS group was higher than in CAE9 group(7.167 ± 0.258 vs 4.917 ± 0.664, P<0.001). Conclusions Mice acute pancreatitis can be successfully induced by 7 i.p. injections of caerulein (50 μg/kg body weight) at 1-hour intervals,caerulein combined with lipopolysaccharides.

Objective To observe the time dependent changes of pancreas and lung injury in mice acute pancrea-titis induced by caerulein,and compare the effects of mice acute pancreatitis model induced by different injection protocols of caerulein and lipopolysaccharides. Methods Acute pancreatitis were induced by different injection frequency of caerulein or caerulein combined with lipopolysaccharides, and plasma amylase activity was detected by starch-iodine colorimetry,and pancreas and lung injury severity was observed on paraffin section after HE stai-ning. Results The injury of pancreas and lung in mice acute pancreatitis induced by caerulein was most severe at 4 h, which began to repair at 24 h, and basically returned to normal at 5 d. 4 h after last injection, the amylase activity in CAE7 group and CAE9 group was higher than that in the control group(6 461±1 078 U/dl vs 3 093± 331 U/dl;6 821 ± 495 U/dl vs 3 093 ± 331 U/dl, all P<0.001), and CAE7+LPS group was higher than in CAE9 group[(8 912±465)U/dl vs (6 821±495)U/dl,P<0.001],the histological score in CAE7 group and CAE9 group was higher than that in the control group(4.750 ± 0.524 vs 0 ± 0; 4.917 ± 0.664 vs 0 ± 0, all P<0.001), and that in CAE7+LPS group was higher than in CAE9 group(7.167 ± 0.258 vs 4.917 ± 0.664, P<0.001). Conclusions Mice acute pancreatitis can be successfully induced by 7 i.p. injections of caerulein (50 μg/kg body weight) at 1-hour intervals,caerulein combined with lipopolysaccharides.

ObjectiveTo measure the iodine content of normal thyroid and the sternocleidomastoid muscle with gemstone spectral imaging (GSI),in order to offer diagnostic reference for iodine excess or iodine deficiency disorders.MethodsA total of 226 cases of patients with suspected neck or cervical disease underwent GSI of the neck,the thyroid and the sternocleidomastoid muscle.One hundred and nineteen cases were male and 107 female,aged 18 to 77 years,average age(46 ± 17) years.Data were transmitted to AW 4.4 workstation and processed using GSI Viewer software to obtain the best contrast-to-noise ratio(CNR) of thyroid to sternocleidomastoid muscle and corresponding singe-energy images.Iodine content of left and right thyroid lobes and both sides of sternocleidomastoid muscle as well as iodine content ratio of thyroid to sternocleidomastoid muscle were calculated in the iodine-based images.ResultsTotal iodine content of the left and the right lobes of the thyroid was (1.5233 ±0.4318)mg/cm3,of the left lobe was (1.5230 ± 0.4271 )mg/cm3,of the right lobe was (1.5236 ± 0.4365 )mg/cm3,there was no significant difference statistically between the two(t =0.0084,P ＞ 0.05).The iodine content of the male was (1.6395 ± 0.4105)mg/cm3,and of the female was (1.4238 ± 0.3832)mg/cm3,there was statistically a significant difference between the two(t =3.4743,P ＜ 0.01 ).Iodine content ratio of thyroid to sternocleidomastoid muscle was 96.6271 ± 33.2442,the ratio in male was 94.6250 ± 37.3621 and in female was 98.0000 ± 29.0737,there was no statistical difference between the two(t =0.3817,P ＞ 0.05).The iodine content of thyroid decreased gradually with age,the difference between groups was statistically significant(F =9.66,P ＜ 0.01 ).The iodine content in ＜ 40 age group[(1.7256 ± 0.4631)mg/cm3] was higher than that in 40 - 60 age group[(1.4517 ±0.3643)mg/cm3] and ＞ 60 age group [(1.4368 ± 0.3465)mg/cm3; q =5.6195,5.4158,all P ＜ 0.01).Conclusions It is easy to calculate thyroid iodine content with gemstone spectral imaging,which can reflect the iodine level of our body,and is helpful for the diagnosis of iodine excess or iodine deficiency disorders.

Objective To study the temporal distribution regular pattern of under 5 mortality rate(U5MR)from 1 998 to 201 4 in Zhejiang Province,and to predict the under 5 mortality rate in 201 5.Methods A time series ARIMA (p,d,q) forecasting model for U5MR was conducted using IBM SPSS Statistics 20.0 statistical analysis software.Results The UMAR showed downward trend.The ARIMA(2,1 ,2)model of U5MR from 1 998 to 201 4 in Zhejiang Province is yt =-0.696 +0.636yt -1 +0.024yt -2 +0.340yt -3 +αt -0.003αt -1 +0.997αt -2 ,and the model fitting was good.Each of the actual mortality was consistent with the trend of model prediction,and was within the 95% confidence interval.The predicted value of U5MR was 4.08‰ (95% CI:1 .52‰ -6.64‰)in 201 5.Conclusion Time series analysis is an effective way to analyze the temporal distribution regular pattern of U5MR,which could be used for short -term prediction.

Objective To evaluate the value of combined special staining technique in observing pathological changes in blood vessels. Methods Totally 999 vascular specimen were harvested from patients with complete medical records,clear diagnosis,and age≥18 years in the Pathology Department of Beijing Anzhen Hospital from January 2014 to September 2017.All specimen were stained with HE,Verhoef-Van Gieson,AB/PAS,and Masson. Then,the result of HE staining was compared with that of the combined special staining (Verhoef-Van Gieson,AB/PAS,and Masson).Results HE staining only showed a small amount of elastic fiber fracture. In contrast,the combined special staining clearly showed the pathological changes including fractures,decreased elastic fibers,and aggregation of extracellular mucous matrix. Diseases in these 999 patients included aneurysm of sinus of valsalva (SVA) (n=3),aortic root aneurysm (ARA) (n=177),thoracic aortic aneurysm (TAA) (n=78),abdominal aortic aneurysm (AAA) (n=17),total thoracoabdominal aortic aneurysm (tTAAA) (n=32),and aortic dissection (AD) (n=692). The median scores of combined special staining of SVA (Z=3.857,P=0.040),ARA (Z=14.307,P=0.000),TAA (Z=26.939,P=0.000),AAA (Z=22.412,P=0.000),tTAAA (Z=15.926,P=0.000),and AD (Z=39.213,P=0.000) were significantly higher than that of HE staining. Conclusion The combined Verhoeff-Van Gieson,AB/PAS,and Masson special staining is an effective technique for observing pathological changes of elastic fibers and mucus in blood vessels.

OBJECTIVE: To observe the in vivo metabolism and distribution characteristics of nano-cerium oxide( nanoCeO_2) in rats,and to explore the radio-protective effect of nano-CeO_2. METHODS: i) A total of 18 specific pathogen free( SPF) SD rats were randomly divided into 3 groups. Rats of experiment group and CeO_2 blood group were gavaged with1. 0 g/kg body weight( bw) nano-CeO_2 suspension. Rats of control group were gavaged with double distilled water( DDW)in equal volume. At different time-points after treatment,venous blood was collected from the rats' eye socket in CeO_2 blood group,meanwhile urine and excrement of rats of experiment group were also collected. Organ and tissue samples of experiment group and control group were collected 24. 0 hours after treatment. The concentrations of cerium in biological samples were detected by inductively coupled plasma mass spectrometry. ii) A total of 72 SPF BALB/c mice were randomly divided into 6 groups. Mice of low-,medium-and high-dose groups were gavaged with 100,300 and 900 mg/kg bw nano-CeO_2 suspension respectively. Mice of negative control group,irradiation control group and drug positive control group were gavaged with DDW in equal volume once daily. After 14 days,mice of the other 5 groups were exposed by60Coγ-rays once with 3. 5 Gy( 1 Gy/min) except the negative control group. Mice of drug positive control group were given intraperitoneal injection with 200 mg/kg bw amifostine half an hour before irradiation. After exposure,mice were treated by the above gavages once daily. After 3 and 8 days,6 mice were randomly selected to collect the peripheral blood for the count of white blood cell( WBC) and lymph cell measuring. RESULTS: i) The cerium concentration in blood reached peak value in 4. 0 hours after exposure of nano-CeO_2,and the cerium concentration of urine and excrement reached maximum in8. 0 hours after exposure. After 24. 0 hours of exposure,the cerium concentration of brain in experiment group was higher than that of control group( P < 0. 05). Among the experiment group,the cerium concentrations of sternum,duodenum and brain were higher than that of kidney and heart( P < 0. 05),meanwhile the cerium concentrations of thymus and lung were higher than that of kidney( P < 0. 05). ii) There was no statistical difference in interactive effect of WBC count and lymph cell counts between nano-CeO_2 exposure ways and time( P > 0. 05). The WBC counts of the low-and medium-dose groups were lower than those of the negative control group and the drug positive control group( P < 0. 05). The WBC count of high-dose group was lower than those of irradiation control group,drug positive control group and medium-dose group( P <0. 05). The lymph cell counts of the 3 dose groups were lower than that of drug positive control group( P < 0. 05).CONCLUSION: The nano-CeO_2 is mainly cumulated in organs such as sternum,duodenum,brain,thymus and lung. After induced by radiation,nano-CeO_2 has a certain degree of promotion role in increasing the WBC counts.