0.05).Conclusion The isotonic contrast medium has litter effect on the renal function of the patients with high risk factors.

Chemotherapy is one of the primary treatment for malignant tumors.Platinum drugs as the most commonly used cycle non-specific clinical antitumor drugs show good curative effect in the clinical treatment of solid tumors,however,resistance or cross-resistance of theplatinum analogous has become one of the main obstacles for platinum and its analogous,which limits their clinical applications.miRNAs play an important role in biology,including cell proliferation,differentiation,apoptosis,stress tolerance,and physiological metabolism.There is a close relationship between miRNAs target gene regulation and tumor drug-resistance.This article is mainly about the role of miRNAs in tumor of platinum resistance.

BACKGROUND: The angiotensin-converting enzyme (ACE) is the important component of the renin-angiotensin-aldosterone system (RAS). The ACE gene has, in fact,insertion/deletion polymorphism in intron 16, consisting of a 287-base pair Alu repeat sequence. ACE gene heterozygotes insertion/deletion (I/D) polymorphism is correlated with cardiovascular disease and IgA nephropathy and other diseases. OBJECTIVE: To investigate the distribution of ACE gene I/D polymor-phism in Chinese Han population in comparison with other known ethnic populations. DESIGN: Observation study on healthy individuals of Han nationality. SETTING: Key Laboratory of Clinical Immunology of Jiangsu Province; Department of Laboratory Medicine, First Hospital Affiliated to Soochow University; Department of aboratory Medicine, College of Medical Technology of Jiangsu University PARTICIPANTS: Totally 241 healthy individuals who received the healthy examination in the First Hospital of Soochow University between December 2005 and January 2006 were recruited in the experiment. They were 152 male and 89 female , with mean age of (27±8)years. All the participants without blood relationship were Han nationality from Suzhou region in China, free from disorder of hepatic, renal, endocrine and cardio- cerebrovascular diseases which were confirmed by clinical and experimen- tal examination. METHODS: Genotype of ACE gene I/D polymorphism allele of 241 healthy individuals of Han nationality was detected with polymerase chain reaction (PCR). PCR purified products with genotype of deletion/deletion (DD) and insertion/insertion (Ⅱ) polymorphism were performed DNA sequencing with fluorescence-labeled end termination method. MAIN OUTCOME MEASURES: Genotype and allele frequency of ACE gene I/D, as well as the comparison between them and those of other ethnic population. RESULTS: All the 241 subjects participated in final result analysis. ① The genotypes of ACE were DD, Ⅱ and ID. Compared with allele Ⅰ, allele D lost 287-base pair Alu repeat sequence. ②The frequencies of genotype Ⅱ, ID and DD were 46.1％, 41.5％ and 12.4％ respectively, with an allelic frequency of 66.8％ for allele Ⅰ and 33.2％ for allele D. ③The distribution of ACE genotype was similar between Japanese and Han nationality crowd, both presenting that type Ⅱ was commonly seen and type DD was the least; ID was mostly found in European and American crowd, but Ⅱ was little found. There was racial diversify of frequency of the distribution of ACE genotype among individuals of Han nationality and Japanese as well as Europeans and Americans. Compared with other nationalities, allele Ⅰ of individuals of Han nationality was significantly higher than that of above nationalities (χ2=105.55,P ＜ 0.01), but allele D was obviously lower (χ2=87.54,P ＜ 0.01). CONCLUSION: ACE gene polymorphism has racial diversify. To know genetic features of ACE gene polymorphism of individuals of different na tionalities is the basis and prerequisite to study the correlation of ACE gene I/D polymorphism with diseases.

Adult stem cells have great differentiation plasticity as embryonic stem cells,can differentiate into other cells or tissues,and have been a hot research spot.This article mainly analyzed the occurrence of tumor stem cells,believed that tumor stem cells are the root of tumor growth,invasion,migration and relapsing,discussed stomach stem cells,tried to search the correlation of carcinoma and stomach stem cells,and analyzed that carcinoma may be a kind of stem cell disease.

Objective:To assess the effects of dental treatment under general anesthesia on the life quality of children and their families.Methods:59 children aged 3 to 6-year-old were included.Parents were required to complete the early childhood oral health impact scales(ECOHIS) before and 1 month after dental treatment under general anesthesia.The questionnaire includes child impact section(CIS) and family impact section(FIS).Data were analyzed using SPSS version 19.0.Results:55 out of the 59 parents completed the qustionnaire.After treatment the total ECOHIS scores decreased by 51％ (P ＜ 0.001),overall child impact section scores decreased by 50％ (P ＜0.001),and family impact section scores decreased by 53％ (P ＜0.001),revealing a large effect size(ES) for the child(1.4) and family (4.0) sections of the ECOHIS.Conclusion:Dental treatment under general anesthesia for uncooperative young children with extensive dental problems can improve the quality of life of both children and their families.

In order to raise international comprehensive medical talents to have strong competition capability,the bilingual teaching is on the rise in the domain of medical education. Questionnaire-based survey among the 5-year-proguam medicinal undergraduate students was conducted to investigate the students'learning condition,acquaintanceship and requirements on the bilingual teaching so as to further reform and explore ways to improve the quality of bilingual teaching

Objective To explore the clinical efficacy and safety of panaxadiol saponins for the treatment of non-small cell lung cancer(NSCLC) with chemotherapy-induced leukopenia.Methods 92 NSCLC patients with leukopenia after chemotherapy were selected and divided into the observation group (46 cases) and the control group (46 cases) by random number table method.On the second day after the chemotherapy,the observation group was given panaxadiol saponins capsules,3 tablets/time,2 times/day.The control group was orally given placebo or reserpine,4 weeks for one course of treatment,the two groups were continuously treated for two courses.The clinical efficacy,number of leukocytes,improvement of TCM symptoms and adverse reactions were evaluated.Results After treatment for 4 weeks and 8 weeks,the WBC counts of the observation group were (4.48 ±0.77) × 109/L and (4.92 ± 0.89) × 109/L,respectively,which were significantly higher than those of the control group[(4.02 ± O.93) × 109/L and (4.57 ± 0.86) × 109/L],the differences were statistically significant(t =8.24,8.41,all P ＜ 0.05).After treatment for 4 weeks and 8 weeks,the TCM syndrome scores of the observation group were (24.02 ± 5.91)points and (21.73 ± 4.14) points,respectively,which were lower than those of the control group [(26.33 ± 5.08) points and (23.14 ± 3.90) points],the differences were statistically significant (t =9.68,9.63,all P ＜ 0.05).After treatment for 4 weeks and 8 weeks,the total effective rates of TCM were 76.09％ (35/46) and 82.61％ (38/46),respectively,which were significantly higher than those of the control group [63.04％ (29/46) and 63.04％ (29/46)],the differences were statistically significant(x2 =10.32,8.61,all P ＜ 0.05).The effective rates of leukopenia improvement of the observation group after treatment for 4 weeks and 8 weeks were 69.57％ (32/46) and 78.26％ (36/46),respectively,which were higher than those of the control group [56.52％ (26/46) and 65.22％ (30/46)],the differences were statistically significant(t =9.38,9.51,all P ＜ 0.05).There were no significant differences in adverse reactions between the two groups (P ＞ 0.05).Conclusion Panaxadiol saponins in the treatment of NSCLC chemotherapy-induced leukopenia can significantly improve the number of white blood cells,improve the clinical symptoms,and it has good safety.

BACKGROUND:It is a key to choose an appropriate method to trans-differentiated bone marrow mesenchymal stem cells (BMSCs)into neuron-like cells for clinical therapy of neural system injury.OBJECTIVE:To observe the feasibility of the differentiation of rat BMSCs supplemented with rat dentate gyrus extract(DGE)into neuron-like cells.METHODS:DGE was applied to induce rat BMSC trans-differentiation,using 20,40,60,80 mg/L protein concentration.Neuron differentiation was measured using Western blot to screen an optimal dosage.After trans-differentiation,different concentration treated cells were collected.Morphology change was observed following differentiation under an inverted microscope.Neuron specific enolase(NSE)and NeuN expression was determined using Western blot.NeuN expression in cells was detected using immunofluorescence technique.RESULTS AND CONCLUSION:After 7 days,60 mg/L DGE was the optimal induction dose detected by Western blot.With increased concentration,NSE and NeuN expression was increased.At 80 mg/L mass concentration,NSE and NeuN expression was reduced.At 60 mg/L DGE,BMSCs following induction became long,with synapses,Immunofluorescence NeuN staining found that neuron-like cells were positive for NeuN following induction.Results indicated that DGE is an effective biological inductor that can induce BMSC differentiation.

Objective To investigate the effects of hypothermia combined with sevoflurane on myocardial monophasic action potential (MAP) and transmural dispersion of repolarization (TDR) of the left ventricle in rabbits in vitro. Methods Adult rabbits weighing 1.5-2.0 kg were sacrificed after heparinized and anesthetized.The hearts were immediately removed and perfused with K-H soluation saturated with 95%O2-5%CO2 at 37℃ in a Langendorff apparatus. Forty-eight isolated hearts were randomly divided into 6 groups ( n = 8 each): Ⅰ control group (group C), Ⅱ low concentration sevoflurane group ( group S1 ), Ⅲ high concentration sevoflurane group (group S2 ), Ⅳ hypothermia group (group H), Ⅴ hypothermia + low concentration sevoflurane (group HS1 ) and Ⅵ hypothermia + high concentraion sevoflurane (group HS2 ).Group C received continous perfusion. Group S1and S2 received perfusion with K-H solution saturated with 2.4% and 4.8% sevoflurane at 37 ℃ for 30 min respectively. Group H received perfusion with K-H solution at 30℃ for 30 min. Group HS1 and HS2 received perfusion with K-H solution saturated with 2.4% and 4.8% sevoflurane at 30℃ respectively.MAPs of epicardium, mid-myocardium and endocardium of the left ventricle were recorded. MAP duration at 90%repolarization(MAPD90)and TDR were calculated. Early after-depolarization,delayed after-depolarization and arrhythmia were also recorded. Results Compared with group C, MAPD90 of the 3 layers of ventricle was significandy prolonged, the incidence of arrhythmia increased in group H (P＜0.05). There was no significant difference in TDR among all groups ( P＞0.05). There was no interaction between sevoflurane and hypothermia (P＞0.05), and it only showed that MAPD90 was prolonged by hypothermia (P ＜0.05 ). Conclusion Hypothermia combined with sevoflurane exerts no significant effects on myocardial MAP and TDR of ventricles in rabbits, and sevoflurane decreases the incidence of hypothermia-induced arrhythmia through inhibiting the prolongation of MAPD90.

Objective To investigate the best models of esophageal cancer surgical approaches,lymphadenectomy ranges and postoperative comprehensive treatment.Methods From January 1998 to December 2007 in 10 years,1 162 cases of different parts with esophageal cancer were analysized which were treated with surgically adopting sequential abdomen,chest,neck three-incision approaches.Taking three-step screening way of preoperative imaging,preoperative ultrasound localigation fineneedle aspiration biopsy cytology and intraoperative rapid fieezing pathological examination were applied to make the selectivity of the first-times cervico-thoraco-abdominal three-field lymph node dissection (3FLND),first-times standard thoracoabdominal two-field lymph node dissection (2FLND) and second-times third-field cervical lymphadenectomy.Meanwhile,we implemented actively postoperative comprehensive treatment and observed the overall clinical efficacy and long-term survival.Results In the group of 1 162 cases with esophageal cancer surgery.The operating resection rate was 100 ％,Radical resection of 97.6 ％ (1 134/1 162).Perioperative overall complication rate was 16.4 ％ (191/1 162).Anastigmatic fistula was 0.6 ％ (7/1 162).Five cases dead in 30 days after surgery.The whole group of lymph node metastasis rate was 52.6 ％ (611/1 162),lymph node metastasis degree in 12.1％ (3 092/25 564).Full group of the first-times 3FLND was 348 cases.The positive rate was 94.8 ％ (330/348),Implementing the first-times 2FLND was in 814 cases and the second-times thirdfield cervical lymph node dissection was performed in 89 cases.The postoperative complications of the 3FLND was significantly higher than that of 2FLND (23.6 ％ vs 13.4 ％).The difference was statistically significant (x2 =18.37,P ＜ 0.001).However,The difference was not statistically significant between 3FLND and 2FLND (P ＞ 0.05).There is no significant difference between the first-times 3FLND with the second-times 3FLND accumulating survival (P ＞ 0.05).But different degree of lymph node metastasis determined prognosis.The difference was significant (x2 =35.57,P ＜ 0.001).In our group the postoperative comprehensive treatment application rate was 87.2 ％.Surgery combined with comprehensive treatment overall 1,3,5 years survival rates were 92.1％,69.2 ％,49.6 ％ respectively.Conclusions The sequential three-incision approaches and selectivity of lymph node dissection have the radical nature thoroughly,fewer complications,high quality of life and the long-term survival advantages.It should be a widely used method in the clinical surgery of the esophageal cancer.Implementing the three-step screening way to selecting the first-times 3FLND,the firsttimes 2FLND and the second-times third-field cervical lymphadenectomy that have targeted strongly and high accuracy,a definite object in view and avoiding patient excessive trauma.Applying the comprehensive treatment after surgery and the re-treated of patients with recurrence that can further more improve the longterm survival of patients.The comprehensive treatment should be the target direction of the future development of esophageal cancer.