Objective To discuss the relationship between carotid atherosclerosis and the ischemic cerebrovascular disease(ICVD).Methods 1583 subjects with acute ICVD enrolled from June 2001 to December 2004 underwent carotid artery duplex ultrasonography.Logistic regression was performed to analyze the relationship between carotid atherosclerosis and ICVD.Results 86.5%(1369/1583)of all the patients had a varying degree of carotid atherosclerosis,in which the occurrence of the atherosclerotic plaques(1286/1583,81.2%)higher than that of stenosis of the extracranial carotid(214/1583,13.5%).There was a significant difference in the incidence of carotid atherosclerosis between patients from the TIA group(198/317,62.5%)and from the cerebral infarction group(1087/1266,85.9%).Carotid atherosclerotic plaques were most commonly seen in the bifurcations of the common carotid artery(665/1286,51.7%).The severity of stenosis of the extracranial carotid and the formation of the atherosclerotic plaques were significantly correlated to the risk factors of cerebrovascular disease.Conclusions Atherosclerotic plaques are dominant characteristics of carotid atherosclerosis in the patients with ICVD in Foshan.There is a positive correlation between carotid atherosclerosis and ICVD.

Objective To study blood lipids levels of patients with ischemic cerebral vascular disease (ICVD).Methods The blood lipids levels were measured in 2886 subjects with ICVD enrolled from 1991 to 2004,in which 1430 subjects from 2000 to 2004 were classified into a sub-group;400 healthy persons receiving physical examination were enrolled as controls.Results The blood TC,TG and LDL-C levels were significantly higher in the sub-group than those in the control group.Both in males and females, the morbidity of abnormal blood lipid metabolism and blood lipids level gradually increased with the age and the lapse of decades.Total cholesterol level of male younger than fifty,averaging (4.43?0.51) mmol/L, increased to (4.96?0.85) mmol/L after fifty years old.The same thing happened to females,from (4.30?0.49) mmol/L to (5.01?0.90) mmol/L.TG and LDL-C increased in patients older than fifty compared with those younger than fifty.In the groups above 50 years old,the blood lipids levels of females were significantly higher than those of males.The morbidity of abnormal blood lipid metabolism of male increased from 24.5% in (1991 to 1994) to 38.1% (2001 to 2004) and of female from 22.3% (1991 to 1994) to 38.5% (2001 to 2004).Conclusions Abnormal blood lipid in Foshan is one of the most important reasons to ICVD.

Objective To investigate and analyze the iodine nutritional status of school-age children six months after implementation of a new standard of iodized salts in northern area of Jiangsu Province,and to provide a basis for control of iodine deficiency disorders.Methods According to the water iodine content,northern area of Jiangsu Province was divided into low,moderate and high iodine areas (the water iodine contents were ＜ 10,l0-150 and ＞ 150 μg/L,respectively).Two towns were selected in each area; one elementary school was selected in each town; and 120 children aged 8-10 were selected in each school.The samples of urine,household salt,and water in each town were collected.Urinary iodine content was tested by arsenic cerium catalytic spectrophotometry;iodine content of household salt sample was determined by direct titration; iodine content of water sample was tested by cerium sulfate catalytic spectrophotometry.Results In low,moderate and high water iodine areas,240,242 and 242 urine samples of 8-10 years old children were tested; urinary iodine median was 135.49,183.62 and 448.99 μg/L,respectively,and the difference between groups was statistically significant (x2 =165.56,P ＜ 0.05).In low,moderate and high water iodine areas,100,131 and 117 household salt samples were tested,and the median of salt iodine was 21.88,22.01 and ＜ 5 mg/kg,respectively.Water samples collected in low,moderate and high iodine areas were 12,14 and 10 copies,respectively,and the median of water iodine was 8.89,38.52 and 189.25 μg/L,respectively,and the difference between groups was statistically significant (x2 =22.27,P ＜ 0.05).Conclusions The iodine nutritional condition of 8-10 years old children in low,moderate water iodine areas in northern area of Jiangsu Province is appropriate.The new standard is suitable for iodine nutritional needs in the area.The iodine nutritional condition in high water iodine area is excess,iodine intake should be reduced.

Objective:To validate an enzyme linked immunosorbent assay (ELISA) method for the quantification of rhCNB in long-tailed macaque sera.Methods: The linear,sensitivity,accuracy,precision and recovery were determined using ELISA.Results:The present ELISA method had high linearity within 0.195 ng/ml-12.5 ng/ml,the working curve of rhCNB was Y=15.1X-0.26, R2=0.996 8 , the method showed good sensitivity of 0.195 ng/ml, the accuracy were in the range of 91.9%-108.8%, and the Coefficient of variation ( CV) for inter-assay were 3.55%,1.39%and 4.71%,the intra-assay were 1.59%,3.2%and 3.8%,all less than 10%, the recoveries were in the range of 88.5% -108.3%, <110% .Thus the method was coincidence with requirement.Conclusion:Double antibody sandwich ELISA assay of rhCNB in long-tailed macaque sera has good sensitivity ,accuracy, precision and recovery and it can be used to measure rhCNB concentration in biological samples .

RNA has received more attention in the field of forensic medicine and the development of the new biological markers based on RNA shows great significance in the analysis of complex cases. circular RNA (circRNA) is a kind of non-coding RNA which is widely reported recently. Although the regulatory mechanisms of generation and expression are not fully clear, the existing research indicates that circRNA has important biological functions. CircRNA has a cell-type-specific expression with great stability and a high expression level, which makes it meaningful in forensic applications potentially. In this paper, the research progress, the generation and regulation of circRNA as well as its biological characteristics and functions are summarized, which will provide references for related studies and forensic applications.
Forensic Sciences ; Humans ; RNA ; RNA, Circular

To silence the expression of K-RASAsn12 in human pancreatic cancer cell line by vector-based RNAi(RNA interference) technique,two single-strand DNA sequences encoding mutant-specific shRNA (short haipin RNA) for K-RASAsn12 were synthesized and then inserted into pSilenCircle. The recombinant plasmid was called pSC-K-RASAsn12. According to the same method, pSC-GFP encoding shRNA for GFP was gained. Both recombinant plasmids were transfected into human pacreatic cancer cell line AsPC-1 and BxPC-3. The expression level of K-RASAsn12 was detected by semi-quantitative RT-PCR and Western blot. The result indicated that the recombinant plasmid edcoding mutant-specific shRNA for K-RASAsn12 can inhibit significantly the expression of K-RASAsn12 without affection of wild-type K-RAS(K-RASWT)in Human Pancreatic Cancer Cell Line.

Adult ; Air Pollutants ; adverse effects ; Humans ; Male ; Military Medicine ; Monitoring, Physiologic ; Noise, Occupational ; adverse effects

BACKGROUNDPhacoemulsification yields successful outcomes in eyes with standard cataract. Though techniques have been improved, it is still challenging to perform phacoemulsification in cases of hard cataracts for difficulty in nuclear management and much more complications. This study aimed at describing and evaluating the efficacy and safety of a peripheral radial chop technique to remove hard cataracts.

METHODSIn this prospective study conducted between January 2003 and January 2004, 107 consecutive eyes with hard cataract underwent modified phacoemulsification surgery with peripheral radial chop technique by the Bausch & Lomb Millennium phacoemulsifier with preset parameters of power less than 30%; vaccum, 150 mmHg; and bottle height, 85 cm when a DP8145 phaco tip was used, and vaccum, 380 mmHg; bottle height, 95 cm when a DP8245 phaco tip was used.

RESULTSThe mean ultrasonic power was 14.7% (range 9% to 19%), ultrasonic time was 1.98 minutes (range 1.55 to 3.18 minutes). At 1, 7 and 30 days postoperatively, the eyes with uncorrected visual acuity 0.5 or better accounted for 76.42%, 87.16% and 90.67% respectively. At 1 month, the endothelial cell loss rate was 9.74% (range 8% to 17%). There were 6 cases of posterior capsule rupture in an early period of study. No serious intraoperative or postoperative complications were noted.

CONCLUSIONSThe peripheral radial chop technique was effective without serious complications in hands of an experienced surgeon.

Objective To study the effects of vascular endothelial growth factor(VEGF)on production of pulmonary surfactants.Method Fetal rat lungs were obtained at 19-day gestation.Primary culture of typeⅡalveolar epithelial cells(AECⅡ)was performed using IgG panning technique.The rats was divided into groups: VEGF,Dexamethasone,VEGF plus Dexamethasone and a control.Total phospholipids,phosphatidylcholine (PC),phosphatidyl glycerol(PG)and sphingornyelin(SM)were determined.Results expressed as mean?SEM. Comparison between groups were made with LSD-t test and one -way ANOVA.Result VEGF,Dexamethasone and VEGF plus Dexamethasone groups showed increased amount of total phospholipids and its compositions on the first day of culture.Conclusions VEGF-165 promotes the production and secretion of pulmonary surfactant. VEGF and Dexamethason may go through different mechanism for enhancement of synthesis of pulmonary surfactant,thereby improve biological function of AECⅡ.

Objective To study the influence of vascular endothelial growth factor(VEGF) on development of alveolar epithelial cell Ⅱ (AECⅡ) and expression of pulmonary surfactant protein B(SP-B) in premature rats.Methods Wistar rats at 19 days gestation were paunched to get embryo and primary AECⅡculture.The rats were divided into 4 groups ,VEGF-165 group,Dexamethasone group,VEGF and Dexamethason group,control group. AECⅡ and SP-B expression were measured by immunology histochemistry.Results SP-B had positive expression in VEGF group, Dexamethason group, VEGF and Dexamethason group. SP-B had negative expression in control group.Conclusion VEGF-165 can increase SP-B positive expression and secret of AECⅡ.VEGF promotes lung maturity.