Animals ; Chick Embryo ; physiology ; Electrocardiography ; methods ; Heart ; embryology ; physiology ; Heart Rate ; physiology

Objective To study the DNA damage of bone marrow cells of mice after exposure to Radon.Methods Twenty-four mice were randomly divided into four groups, one control group and three experimental groups with the cumulative doses of radon at 27 WLM (low dose group), 52 WLM (middle dose group) and 105 WLM ( high dose group). DNA damage induced by radon in bone marrow of mice was detected by methods of single cell gel electrophoresis (SCGE), micronucleus(MN) and laser scanning confocal microscope (LSCM) observation. Results The DNA strand breakage, rate of MN and apoptosis increased significantly in the high dose group, but not in the middle and low dose groups. Conclusions Exposure to radon could induce DNA damage in bone marrow cells of mice at high levels.

Objective To detect the changes in protein profile of rats'lung inhaled radon using two- dimensional electrophoresis(2-DE)and MS.Methods Male Wistar rats were exposed to radon with the cumulative dose up to 100,200 and 400 working level months(WLM).The total proteins of rats'lung were extracted and isolated by 2-DE.The different protein expressions were analyzed with ImageMaster 2D Platinum software and obviously altered proteins were digested by trypsin and identified by MALDI-TOF-MS.Resuits Comparison of the 2-DE images between the control and radon-exposed groups indicated 14 up-regulated and 9 down-regulated protein spots,15 of which were identified by MALDI-TOF or MALDI-TOF/TOF MS.Conclusions The 2-DE image of radon groups'lung has changed,and the lung damage effect of radon is related to some proteins.

Objective To study the significance of S100A12 in patients with acute pancreatitis (AP).Methods 139 patients with AP were divided into the severe acute pancreatitis (SAP) and moderate acute pancreatitis (MAP) groups.61 patients in the SAP group were further subdivided into the infection group (n =32) and the non-infection group (n =29) based on the presence/absence of secondary infection.Serum samples of these patients were collected on the 3rd,7th and 14th day after treatment.ELISA was used to determinate the S100A12,IL-1 β and IL-6 levels in serum.The area under ROC was used to evaluate the predictive role of S100A12,IL-1β,IL-6 and CRP for infection in patients with SAP.Results The S100A12,IL-1β and IL-6 levels in SAP patients were markedly higher than those in MAP patients and normal controls on the 3rd,7th and 14th day after treatment.These levels decreased toward normal range in MAP patients.They were persistently high in SAP patients after treatment for 7 days,but decreased significantly after 14 days.The serum levels of S100A12,IL-1β,IL-6 and CRP were significantly higher in the infection subgroup(647.5 ± 300.1,155.9 ±48.5,95.7 ±25.5,166.8 ±53.0) than the non-infection subgroup(249.0 ± 176.3,108.0 ± 46.1,64.0 ±38.5,117.9 ±34.9) (P ＜0.05).The sensitivity and specificity of serum S100A12 in diagnosing secondary infection in SAP were 96.8％ and 83.3％,which were higher than those of serum IL-1β,IL-6 or CRP.Conclusion The level of S100A12 was associated with systemic inflammatory response syndrome (SIRS) in AP,and it may serve as a new marker in early diagnosis of SAP and in secondary infection in SAP.

Objective To explore the diagnostic value of 64 layers spiral CT for gastric carcinoma .Methods The 87 patients (primarily diagnosed gastric carcinoma )were studied and scanned under 64 layers spiral CT including plain scans and enhanced scans respectively .The source images were reconstructed using the technique of multilane volume reconstruction (MPVR) and CT virtual endoscopy (CTVE) and conducting TNM stage ,then compared to histopathology results after surgery .Results 85 out of 87 patients with gastric carcinoma were diagnosed by CT .Detection rate of multi-detector CT(MDCT) for gastric cancer was 97 .7% , while the early stage and advanced stage gastric carcinoma were 66 .7% and 100% respectively .The accuracies of 64 layers spiral CT for the T stage ,the N stage and the M stage of the gastric carcinoma were 83 .9% ,72 .4% and 92 .0% respectively .Conclusion 64 layers spiral CT could be helpful for the diagnosis of gastric carcinoma and TNM stage .It might play great roles for the diag-nosis and treatment of gastric carcinoma .

Objective To explore the relationship between the levels of plasma coagulation factors (F) and acute myocardial infarction (AMI) in low age period (<60 years old) and their diagnostic value in diagnosing AMI in low age period.Methods One hundred and sixty inpatients with low age AMI in the cardiology department of the Heze Municipal Hospital were selected as the case group,and contemporaneous 160 cases of low age non-AMI served as the control group.F Ⅱ,FⅦ,FⅧ,fibrinogen (Fg) and von willebrand (vWF) were measured with enzyme-linked immunoabsorbent anti-sandwich assay.The relationship between coagulation factors and low age AMI was analyzed with univariate and multivariate analysis,and their value for diagnosing low age AMI was evaluated with diagnostic test and receiver operating characteristics (ROC) curve.Results The univariate analysis showed that FⅡ,FⅦ,FⅧ and Fg levels had significantly statistical difference between the case group and control group(P<0.05),and the vWF level had no statistically difference(P>0.05).The multivariate analysis indicated that the FⅡ level≥ 14.27 μg/L and FⅦ level ≥22.99 μg/L were the independent risk factors for low age AMI.The value of FⅡ for diagnosing low age AMI was lower,and the optimal cut off value of Fg for diagnosing low age AMI was 22.99 μg/L,its area under ROC curve was 0.709 with a moderate diagnostic value,and the sensitivity (91.88%) and negative predictive value (86.02%) were higher,the false negative rate (13.98%) was lower,and the accuracy (70.94%) was moderate.Conclusion The FⅡ level ≥14.27 μg/L and Fg level ≥22.99 μg/L are the independent risk factors for low age AMI,and detecting the Fg level could have hint significance in diagnosing low age AMI.

Objective To explore the effect of SFI in radiation-induced mice brain injury after 20 Gy cranial radiation.Methods The mice were divided into three groups:(1) control group,(2) RT-only group:the whole brain was irradiated with a dose of 20 Gy,(3) RT and SFI group:SFI at 20 ml/kg/d from 4 weeks after 20 Gy cranial radiation theraty(CRT).Results Morris water maze test showed that the latency of the irradiated group was longer than control group and SFI improved the cognitive function of mice (t =6.34,6.70,P ＜0.05).The expression of TNF-α reached to the highest level at 3 h after irradiation,and then it decreased but got the second higher level again at 4 weeks after irradiation.The expression of IL-1 β reached to the highest level at 72 h after irradiation and decreased until 4 weeks after irradiation.SFI decreased both expressions of TNF-α (t =11.34,9.70,6.07,P ＜ 0.05) and IL-1 β (t =12.27,5.70,7.52,P ＜ 0.05).Immune florescence staining showed that SFI reduced the number of activated microglia (t =12.35,8.64,7.82,P ＜ 0.05)and inhibited the translocation of p65 of microglia after irradiation.Conclusions Findings suggest that SFI may decrease microglial activation and suppress the expression of TNF-α and IL-1β by inhibiting the translocation of NF-κB p65 and then attenuate irradiation-induced brain injury.

Objective To establish a model of malignant transformation of human cells in vitro to study the lung cancer induced by radon and cigarette smoke. Methods The immortalized human bronchial epithelial cells BEAS-2B were divided into control group( C ), radon group ( Rn), cigarette smoke group (Sm) and combined group (Rn-Sm). Cells were planted onto transwell membrane one day before exposure and were directly exposed to radon and cigarette smoke pumped in a gas inhalation box. After the exposure cells were trypsinized into dishes for further growth and malignancy transformation phenotype was detected in order to compare the effects due to radon and cigarette smoke exposure. Results BEAS-2B cells showed malignantly transformed phenotype by exposure to radon and cigarette smoke. A series of sequential steps emerged among transformed cells, including altered growth kinetics, resistance to serum has changed from 0. 31 ± 0. 18 to 1.92 ± 0. 27,2. 03 ± 0. 14,2.95 ± 0. 60, and anchorage-independence growth increased from (0.01 ±0.02)% to (4.89 ±0.30)%,(8.36 ±0.50)%,(11.74 ±0.69)%.After being subculture for 20 generations, cell apoptosis of the fifth generation cells exposed to radon,cigarette smoke and both was significant decreased from ( 11.76 ± 0. 17 ) % to (4. 62 ± 0. 42 ) %、 ( 8.63 ±0. 15 )%、 (3.68 ± 0. 33 )%. Conclusions BEAS-2B cells could be malignancy transformed by radon and cigarette smokein vitro, which could be used as a cell model in lung bronchial carcinogenesis.

Objective To screen and identify the differential expression genes on peripheral blood cells of mice based on the experimental animal model of radon exposure. Methods BALB/c mice were exposed in a type HD-3 multifunctional radon-room, with the accumulative doses of radon-exposure group at 105 WLM and control group at 1 WLM. Total RNA was extracted from peripheral blood cells and the methods of SMART for dscDNA synthesis and SSH for gene screening was applied. With the construction of the cDNA library enriched with differentially expressed genes, the pMD 18-T plasmid containing LacZ operator at the multiple cloning site was used to allow a blue-white screening. The TA clones were amplified by nested PCR and the reverse Northern blot was used to identify up and down regulation of the clones. The differently expressed cDNA was then sequenced and analyzed. Results The subtracted cDNA libraries were successfully constructed. A total of 390 recombinant white colonies were randomly selected. Among the 312 cDNA monoelones selected from bath forward- and reverse-subtracted libraries,41 clones were chosen to sequence for their differential expressions based on reverse Northern blot. Among the 41 sequenced clones, 10 clones with known function/annotation and 3 new ESTs with the GenBank accession numbers were obtained. Most of the known function/annotation genes were revealed to be related with cell proliferation, metabolism, cellular apoptosis and carcinogenesis. Conclusions The animal model of radon exposure was established and the cDNA library of peripheral blood cells was suceessfully constructed. Radon exposure could up- and down-regulate a series of genes. Differentially expressed genes could be identified by using SSH technique and the results may help exploring mechanisms of random exposure.

PurposeTo evaluate multislice spiral CT (MSCT) in diagnosing abdominal anaphylactoid purpura (AAP), and to explore its role in treatment follow-up.Materials and Methods Clinical and MSCT data of 13 patients with confirmed AAP were retrospectively analyzed. All patients underwent abdominal CT scan and thin layer reconstruction. Upper endoscopy was performed in 8 patients prior to treatment. MSCT was performed in 10 patients and endoscopy in 4 patients posttreatment, then clinical and CT features were compared to pretreatment findings.Results In pretreatment CT scan, single segment bowel involvement was found in 2 cases, multisegmental bowel involvement in 10 cases, and no positive finding in 1 patient. The duodenum and jejunum were involved in 8 patients and stomach in 5 patients. The diseased bowel wall showed swelling and thickening with decreased attenuation and homogeneous luminal narrowing with equivocal lining and double loop sign. Infiltration was found in 10 patients, small ascites in 3 patients. Patients were misdiagnosed as acute pancreatitis in 2 cases, acute cholecystitis, small bowel obstruction and peritonitis in 1 case respectively. Of 13 patients, five patients were cured, and the other 8 patients were improved. The clinical symptoms including rash, abdominal pain, occult blood, leukocytosis, vomiting, melena, urine occult blood were improved (χ2=5.59-18.33,P<0.05 orP<0.01). Post treatment CT showed significant improvement of bowel edema and infiltration (P<0.01). There was no statistically significant difference in change of ascites (P>0.05).Conclusion MSCT findings of AAP are nonspecific. CT diagnosis is difficult before skin rash. Combining CT characteristics of multisegmental bowel edema and clinical manifestations is helpful. CT examination can effectively follow up treatment response.