Objective To explore the feasibility of labeling in vitro rabbit osteoblasts with Qtracker and the features of Qtracker-labeled rabbit osteoblasts. Methods A healthy male rabbit, 3 months old, weighing 2 kg, was used in this study. After bone marrow was aspirated, bone marrow stromal cells (BMSCs) were isolated and cultured using the adherence method in vitro. The third passage of BMSCs was induced into osteablasts before incubation with Qtracker at concentrations of 1, 2, 4, 8, 16, 32 nmol/10~6 cells (Groups A, B, C, D, E, F respectively). Cells not labeled by Qtracker served as negative control (Group G). The following parameters were measured: induction, differentiation and determination of rabbit osteoblasts; the optimal mass concentration of Qtracker labeling by fluorescence microscopy and flow cytometry; the cell sur-vival rates at various concentrations of Qtraeker labeling by trypan-blue exclusion; Qtracker-labeled cell pro-liferation by MTr. Results The primary and the passage rabbit BMSCs were chiefly of fusiform shape. Rabbit BMSCs differentiated into osteoblasts following induction. The osteoblasts cytoplasm showed green fluorescence under fluorescence microscopy after being labeled by Qtracker. The mean labeling rate increased with the increased concentration of Qtracker, reaching up to (93.58±2.08) % after incubation at 8 nmol/ 10~6 cells by fluorescence microscopy, and (95.24±1.31) % by flow cytometry. There were no significant differences between Groups D, E, F(P>0.05), but significant differences were found between Groups A, B, C and Groups D, E, F (P<0.05). The labeling rate for Group G was 0. The cell survival rates were all above 96% (P>0.05) . No significant differences were found in the cell proliferation among various con-centrations (P>0.05). Conclusions Qtraeker can be used as a labeling marker for rabbit osteoblasts. When the concentration is at 8 nmol/10~6 cells, optimal labeling effect can be achieved. Rabbit osteoblasts labeled with Qtracker are of high efficiency and safety.

Objective To evaluate the relationship between stenosis of intra- or extra-cranial cerebral large artery and capsular warning syndrome(CWS). Methods Eleven consecutive CWS patients hospitalized during period of time from November 2008 to December 2009 were retrospectively analyzed.Result In these 11 patients with CWS, 5 patients had motor symptoms only, 4 patients had pure sensory symptoms, and 2 patients had sensorimotor symptoms. Ten patients underwent cervical contrast-enhanced MRA and intracranial MRA examination. The results showed no sign of arterial stenosis. Seven CWS patients eventually had strokes, 1 progressed to stroke despite receiving the therapy of antiplatelet and anticoagulation. All stroke lesions were located in the capsula interna. All the CWS patients had vascular risks: 7 were smoker, 8 had hypertension, 1 had diabetes mellitus, and 5 had hyperlipidemia. One patient had a history of previous stroke; no patient had a history of ischemic heart disease or atrial fibrillation. At follow-up(10. 2 ±3.4)mouths, the average modified Rankin scale score for all patients was 0. 73 ± 1.20.Conclusion CWS was not associated with stenosis of the intra and extra-cranial large cerebral arteries.CWS may be associated with small-vessel single-penetrator disease.

Objective: To establish a method for determing the trichloroethylene(TCE)and trichloroethanol(TCOH)in blood samples by liquid-liquid extraction-gas chromatography with electron capture detector. Methods: With this method,ether was used as extraction solvent and trichloromethane was used as an internal standard. The whole blood sample was extracted with ether, and dehydrated by anhydrous sodium sulfate. Then the analytes were separated on HP-5 capillary column(30m×0.32mm×0.15μm)and detected byECD.The retention time was for qualitative analysis and the internal standard was for quantitation. Results: The standard curves of TCE and TCOH showed significant linearity between 95.5μg/L-7640.0μg/L(r=0.9997)and 19.0μg/L-1520.0μg/L(r=0.9992). The average recovery was 95.5%-103.6%.The intra-day and inter-day precisions(RSD)were 2.5%-6.8%(n=6)and 1.6%-4.3%(n=6) respectively. The detect limit of TCE and TCOH were 2.10 μg/L and 0.56μg/L(S/N=3)respectively.The blood can be kept 7 days at-20℃ refrigerator without significantly loss. Conclusion This method is proved to be simple,practical and highly sensitive. It can satisfy the request for the determination of blood samples of humans exposed to TCE.

Objective: To establish a method for determination the S-phenylmercapturic acid in urine by dispersive solid-phase extraction using Humic Acid/Fe₃O₄ magnetic nanocomposite as adsorbent. Methods: The 5 ml of urine samples were adjusted to pH 1.0 and extracted by Fe3O4@HA. Then the analytes were separated on EC-C₁₈ capillary column and detected by HPLC-VWD. The S-phenylmercapturic acid was characterized by the retention time and quantified by peak area and external standard method. Results: The standard curves of SPMA showed significant linearity between 0.04~1.00 mg/L (r=0.999 7) . The average recovery was 94.2%~102.4%. The intra-day and inter-day precisions (RSD) were 2.9~6.7% (n=6) and 3.1~7.5% (n=6) respectively. The detect limit of SPMA was 0.012 g/L (S/N=3) . Conclusion This method is simple, rapid, sensitive and accurate. It is applicable for determination of SPMA in the urine of works who were exposed to benzene.

Objective:To establish a method for determination of the butanone in urine by gas chromatography (GC) with pre-column derivation.Methods:For detecting of butanone in urine, potassium iodide and potassium dichromate were added into urine under acidic condition, sample derivatization was undertaken in 50 ℃ water bath for 60 min and the iodine butanone was extracted with n-hexane. After the sodium thiosulfate solution was used to remove excess iodine, urine samples were centrifuged at 10000 r/min for 5 min, then the supernatant was analyzed using temperature rising programming with the Agilent Hp-5 column (30 m×0.32 mm, 0.25 μm) and electron capture detector (ECD) as the detector. The detector temperature was 300 ℃, the inlet temperature was 200 ℃, and the carrier gas was nitrogen.Results:For detecting of butanone in urine, potassium iodide and potassium dichromate were added for derivatization under the acidic condition. After extraction and centrifugation, the supernatant directly put through column and detected by ECD. In present study, the sample pretreatment condition was optimized, the relative standard deviations of intra-day and inner-day, the spiked samples and its recovery were evaluated for analyzing the accuracy of the proposed method.Conclusion:This method has proved to be simple, efficient and highly sensitivity, it can be utilized for butanone detection in occupational population.

Objective:To establish a method for determination of the butanone in urine by gas chromatography (GC) with pre-column derivation.Methods:For detecting of butanone in urine, potassium iodide and potassium dichromate were added into urine under acidic condition, sample derivatization was undertaken in 50 ℃ water bath for 60 min and the iodine butanone was extracted with n-hexane. After the sodium thiosulfate solution was used to remove excess iodine, urine samples were centrifuged at 10000 r/min for 5 min, then the supernatant was analyzed using temperature rising programming with the Agilent Hp-5 column (30 m×0.32 mm, 0.25 μm) and electron capture detector (ECD) as the detector. The detector temperature was 300 ℃, the inlet temperature was 200 ℃, and the carrier gas was nitrogen.Results:For detecting of butanone in urine, potassium iodide and potassium dichromate were added for derivatization under the acidic condition. After extraction and centrifugation, the supernatant directly put through column and detected by ECD. In present study, the sample pretreatment condition was optimized, the relative standard deviations of intra-day and inner-day, the spiked samples and its recovery were evaluated for analyzing the accuracy of the proposed method.Conclusion:This method has proved to be simple, efficient and highly sensitivity, it can be utilized for butanone detection in occupational population.

Objective:The pregnancy outcome,related influencing factors and genetic results of pregnant women with intracranial cysts were comparatively analyzed to provide evidence for prenatal consultation and clini-cal treatment of the fetus with intracranial cyst.Methods:A total of 92 pregnant women with fetal intracranial cysts were selected.The data of pregnancy and delivery were collected by electronic medical record system.The prog-nosis of newborn was recorded by telephone follow-up.According to the pregnancy outcome,they were divided into continued pregnancy group(80/92,87%)and induced labor group(12/92,13%).Analyze the factors that might influence the pregnancy outcome of intracranial cysts,as well as genetic outcomes.Results:Compared with the continued pregnancy group and the induced labor group,there were statistical differences between the gesta-tion age at diagnosis≤28 weeks and the presence of other abnormalities(P＜0.05),but there were no statistical differences in the age of pregnant women and the number of intracranial cysts(P＞0.05).The results of genetic examination were compared between normal and abnormal groups of 25 cases,and there were no statistical differences in the age of pregnant women,the gestation age at diagnosis,whether there was adverse pregnancy history,whether there was single cyst,and the presence of other abnormalities(P＞0.05).Conclusions:Diagno-sis of fetal intracranial cyst at≤28 weeks gestation and other systemic abnormalities are risk factors affecting pregnancy outcome.

Objective:The pregnancy outcome,related influencing factors and genetic results of pregnant women with intracranial cysts were comparatively analyzed to provide evidence for prenatal consultation and clini-cal treatment of the fetus with intracranial cyst.Methods:A total of 92 pregnant women with fetal intracranial cysts were selected.The data of pregnancy and delivery were collected by electronic medical record system.The prog-nosis of newborn was recorded by telephone follow-up.According to the pregnancy outcome,they were divided into continued pregnancy group(80/92,87%)and induced labor group(12/92,13%).Analyze the factors that might influence the pregnancy outcome of intracranial cysts,as well as genetic outcomes.Results:Compared with the continued pregnancy group and the induced labor group,there were statistical differences between the gesta-tion age at diagnosis≤28 weeks and the presence of other abnormalities(P＜0.05),but there were no statistical differences in the age of pregnant women and the number of intracranial cysts(P＞0.05).The results of genetic examination were compared between normal and abnormal groups of 25 cases,and there were no statistical differences in the age of pregnant women,the gestation age at diagnosis,whether there was adverse pregnancy history,whether there was single cyst,and the presence of other abnormalities(P＞0.05).Conclusions:Diagno-sis of fetal intracranial cyst at≤28 weeks gestation and other systemic abnormalities are risk factors affecting pregnancy outcome.

Objective:The pregnancy outcome,related influencing factors and genetic results of pregnant women with intracranial cysts were comparatively analyzed to provide evidence for prenatal consultation and clini-cal treatment of the fetus with intracranial cyst.Methods:A total of 92 pregnant women with fetal intracranial cysts were selected.The data of pregnancy and delivery were collected by electronic medical record system.The prog-nosis of newborn was recorded by telephone follow-up.According to the pregnancy outcome,they were divided into continued pregnancy group(80/92,87%)and induced labor group(12/92,13%).Analyze the factors that might influence the pregnancy outcome of intracranial cysts,as well as genetic outcomes.Results:Compared with the continued pregnancy group and the induced labor group,there were statistical differences between the gesta-tion age at diagnosis≤28 weeks and the presence of other abnormalities(P＜0.05),but there were no statistical differences in the age of pregnant women and the number of intracranial cysts(P＞0.05).The results of genetic examination were compared between normal and abnormal groups of 25 cases,and there were no statistical differences in the age of pregnant women,the gestation age at diagnosis,whether there was adverse pregnancy history,whether there was single cyst,and the presence of other abnormalities(P＞0.05).Conclusions:Diagno-sis of fetal intracranial cyst at≤28 weeks gestation and other systemic abnormalities are risk factors affecting pregnancy outcome.

Objective:The pregnancy outcome,related influencing factors and genetic results of pregnant women with intracranial cysts were comparatively analyzed to provide evidence for prenatal consultation and clini-cal treatment of the fetus with intracranial cyst.Methods:A total of 92 pregnant women with fetal intracranial cysts were selected.The data of pregnancy and delivery were collected by electronic medical record system.The prog-nosis of newborn was recorded by telephone follow-up.According to the pregnancy outcome,they were divided into continued pregnancy group(80/92,87%)and induced labor group(12/92,13%).Analyze the factors that might influence the pregnancy outcome of intracranial cysts,as well as genetic outcomes.Results:Compared with the continued pregnancy group and the induced labor group,there were statistical differences between the gesta-tion age at diagnosis≤28 weeks and the presence of other abnormalities(P＜0.05),but there were no statistical differences in the age of pregnant women and the number of intracranial cysts(P＞0.05).The results of genetic examination were compared between normal and abnormal groups of 25 cases,and there were no statistical differences in the age of pregnant women,the gestation age at diagnosis,whether there was adverse pregnancy history,whether there was single cyst,and the presence of other abnormalities(P＞0.05).Conclusions:Diagno-sis of fetal intracranial cyst at≤28 weeks gestation and other systemic abnormalities are risk factors affecting pregnancy outcome.