Air Pollutants ; analysis ; Humans ; Industry ; Lead ; analysis ; chemistry ; Spectrometry, Fluorescence ; methods ; Spectrophotometry, Atomic ; methods ; Workplace

Objective To examine the expression of lipoxygenases (LOXs)on human pancreatic carcinoma and their effects on proliferation and apoptosis of human pancreatic carcinoma in vitro.Methods Expression of 5- LOX and 12-LOX in the tissue of human pancreatic carcinoma and pancreatic cancer cell line (SW1990) was detected by immunohistochemical staining and RT-PCR.To examine the effects of polyunsaturated fatty acids on pancreatic cancer cell line,the proliferation rate of SW1990 cells treated with arachidouic acid (AA),docosahexaenoic acid (DHA) and eicosapentenoic acid (EPA) was analyzed by MTT and the incorporation of bromodeoxyuridine (BrdU) methods.An annexinV/propidium iodide (PI) assay with flow cytometry and in situ terminal deoxynucleotidyl transferase-mediated dUTP-digoxigenin end labeling (TUNEL) assay were used to identify potential induction of apoptosis by the unsaturated fatty acids.The effects of 5-LOX inhibitor (MK-886) and 12-LOX inhibitor (baicalein) on the proliferation of SW1990 cells were determined by above methods.Results Both 5-LOX and 12-LOX were over expressed in the tissue of human pancreatic carcinoma and the pancreatic cancer cell line.AA had a stimulatory effect on the growth of SW1990 cells while EPA and DHA had an inhibitory effect in a dose-dependent manner.The apeptosis of SW1990 cells co-cultured with DHA or EPA lasting for 24 hours was increased markedly.Furthermore, both MK-886 and baicalein in a dose-dependent-manner inhibited the growth of SW1990 cells ard induced a significant increase of apoptotic cells rate.Conclusions Expression of lipoxygenase is up-regulated in human pancreatic cancer. Polyunsaturated fatty acids have regulatory effects on the growth of pancreatic carcinoma in vitro.AA stimulates proliferation of pancreatic cancer cell line,while DHA and EPA suppress proliferation,simultaneously inducing apoptosis of pancreatic cancer cell line.Blocking the functions of lipoxygenase with its inhibitor exerts a negative regulatory effect on the growth of pancreatic carcinoma in vitro.Lipoxygenase might be a novel therapeutic target for the pancreatic cancer.

Objective To study the feasibility of noninvasive detection of unstable plaques with ~(18)F-Fluorodeoxyglu-cose (~(18)F-FDG) PET/CT imaging. Methods Atherosclerotic plaques were induced in male New Zealand white rabbits. Animals were injected with FDG labeled with ~(18)F, then examined with PET/CT. Aorta was explanted for photography with digital camera, and ~(18)F-FDG uptake analysis. Thirty unstable plaques and 30 stable plaques were choosed so as to compare the quantitativly ~(18)F-FDG uptake. The number of macrophages and smooth muscle cells was detected by immunohistochemical technique. Results Experimental group showed inconsistent uptake of ~(18)F-FDG in the abdominal aorta. The results were confirmed in the ex vivo digital photo of the explanted aorta. The target to non target ratio (T/NT) and macrophages of unstable plaques were higher than stable plaques (P<0.01) , but smooth muscle cells obviously reduced (P <0. 01). Correlation analysis showed that there was a positive correlation between T/NT and macrophage content (r=0. 815,P<0. 01), and a negative correlation between T/NT and SMC content(r=-0. 684,P <0. 01). Conclusion ~(18)F-FDG PET/CT can constitute an attractive imaging method for the noninvasive detection of experimental unstable plaques.

Objective To investigate the surgical approach for adult patients with presacral cystic teratoma.Methods In this study,16 female patients,aged at 26-45 years,with presacral cystic teratoma underwent surgical resection between March 2007 and August 2012.Tumor was primary in 9 cases and recurrent in 7 cases,Rectal examination revealed retrorectal tough semi-circular poorly movable massess with intact rectal mucosa.MR examination showed cystic or solid mass in the anterior sacral,clear boundary,rectum and or vagina compressed.Tumors were completely removed in all cases.Results All patients were cured by surgery,13 cases were cured by one stage resection and 1 was cured by two stage resection.Two cases suffered from recurrence and was cured by reoperation.There were no injury to rectum,anal sphincter,cauda equina,presacral vein.Pathological diagnosis was cystic teratoma.Conclusions By sacrococcygeal surgical resection of presacral cystic teratoma was safe and effective ; complete resection of the tumor capsule is the key to successful operation.

Humans ; Interferons ; administration & dosage ; therapeutic use ; Lymphoma, Mantle-Cell ; drug therapy ; Male ; Middle Aged ; Thalidomide ; administration & dosage ; therapeutic use

Objective To discuss adhesion blocking experiment of vascular endotelial cells with platelets.Methods The expression,regulation and adhesion of CD226 on vascular endothelial cells incubated by sera from 10 PIH patients and 10 normal pregnant women repectively was detected by flow cytometry,then incubated with interacted platelets by PTA1/Ig protein.Results The positive rate of CD226 in PIH group was significantly higher than that in normal pregnant woman group(P

Objective To establish the acute hind limb ischemia on Wistar rat with diabetes mellitus.MethodsThirty diabetes rats were induced by intraperitoneal STZ (50 mg/kg) injection, as well as the blood glucose level tested over 16.8 mmol/L. The rats were ligated on the left femoral artery, then the blood perfusion on the hind limbs ischemia was measured by LDPI after the operation. Results The fasting plasma glucose level on 22 Wistar rats(81.5%) was kept above 16.8 mmol/L, and the hind limb blood perfusion would recover slowly to the level of the right side from 1 to 14 day (P

Objective To observe the effect of fluvastatin(Flu) on differentiation and induction of human promyelocytic leukemia HL-60 cells and provide the theoretical foundation for treatment of human promyelocytic leukemia.Methods The cultured HL-60 cells were treated with 20 ?mol?L-1 Flu,the morphological changes of the cell differentiation were examined.The NBT reduction capability was detected in HL-60 cells treated with Flu for 72 h.After HL-60 cells were treated with 20 ?mol?L-1 Flu for 5 d,they were stained with non-specific esterase and the percentage of differentiation cells was analyzed.Results The HL-60 cells treated with Flu showed smaller cell body,reducing proportion of nucleus to cytoplasm,the nucleus tortuosity,fold or sublobe.There were specific granules and vacuoles in cytoplasm,displaying that some cells had differentiated to relative mature cells.As compared with control group,the NBT reduction capability in HL-60 cells treated with Flu for 72 h was significantly higher than that in control cells(P

Objective To study the feasibility of noninvasive detection of unstable plaques with 18F-Fluorodeoxyglucose (18F-FDG) PET/CT imaging. Methods Atherosclerotic plaques were induced in male New Zealand white rabbits. Animals were injected with FDG labeled with 18F,then examined with PET/CT. Aorta was explanted for photography with digital camera,and 18F-FDG uptake analysis. Thirty unstable plaques and 30 stable plaques were choosed so as to compare the quantitativly 18F-FDG uptake.The number of macrophages and smooth muscle cells was detected by immunohistochemical technique. Results Experimental group showed inconsistent uptake of 18F-FDG in the abdominal aorta. The results were confirmed in the ex vivo digital photo of the explanted aorta. The target to non target ratio(T/NT) and macrophages of unstable plaques were higher than stable plaques(P

Objective To evaluate the effects of tempol administered via different routes on neuropathic pain (NP) in rats.Methods Thirty-two male Sprague-Dawley rats,weighing 250-280 g,aged 8-10 weeks,were randomly divided into 4 groups (n=8 each) using a random number table:sham operation group (group S),group NP,intrathecal tempol group (group T1),and intraperitoneal tempol group (group T2).Neuropathic pain was induced by chronic constriction injury in chloral hydrate-anesthetized rats.The sciatic nerve was exposed and 4 loose ligatures were placed on the sciatic nerve at 1 mm intervals with 4-0 silk thread.The sciatic nerve was only exposed but not ligated in group S.After successful establishment of the model,a catheter was inserted at L4.5 interspace into the epidural space.In S and NP groups,0.9％ normal saline 20 μl was injected intrathecally,and 0.9％ normal saline 200 μl was injected intraperitoneally once a day for 7 consecutive days.In group T1,tempol 30 μg (in 20 μl of normal saline) was injected intrathecally,and 0.9％ normal saline 200 μl was injected intraperitoneally once a day for 7 consecutive days.In group T2,tempol 30 μg (in 200 μl of normal saline) was injected intraperitoneally,and 0.9％ normal saline 20 μl was injected intrathecally once a day for 7 consecutive days.The mechanical paw withdrawal threshold (MWT) and thermal paw withdrawal latency (TWL) were measured at 3 days before operation,and at 1,3,5,7,10 and 14 days after operation.The animals were sacrificed after measurement of pain threshold at day 14 after operation.The lumbar segment of the spinal cord was removed to detect malondialdehyde (MDA) content and superoxide dismutase (SOD) activity by enzyme-linked immunosorbent assay.Results Compared with group S,the MWT was significantly decreased,and the TWL was shortened at each time point after operation,the content of MDA in the spinal cord was increased (P＜0.05),and no significant difference was detected in SOD activity in group NP (P＞0.05).Compared with group NP,the MWT was significantly increased at 5,7,10 and 14 days after operation,the TWL was prolonged at 1,3,5,7,10 and 14 days after operation,the content of MDA in the spinal cord was decreased,and the SOD activity was increased in group T1 (P＜0.05),and no significant change was found in the indexes mentioned above in group T2 (P＞0.05).Conclusion Intrathecal tempol can reduce NP in rats,and the mechanism is related to inhibition of lipid peroxidation in the spinal cord.