Objective To make an attempt at some conditions on extracting heavy metals in chry-soidine by supercritical CO_2 extration.Methods Taking sodium diethyldithiocarbamate trihydrate(NaDDC?3H_2O) as chelating agent and ethanol as entrainer,the orthogonal test was designed and ICP-MS used to mensurate the contents of Cu,As,and Pb in chrysoidine under different conditions.According to the results,the factors including extracting pressure,temperature,chelating agent dosage,and time were studied.Results When the test sample was 10 g,the optimum condition was that extracting pressure: 25 MPa,the temperature : 60 ℃,chelating agent dosage: 2 g,extracting time: 3 h,and the ethanol dosage: 10 mL.After extracting reaction,the contents of heavy metal in chrysoidine reached United States FDA standard.Conclusion The contents of heavy metal in Chinese herb medicine are notably decreased,and this way provides a new thought and research technique to decrease the contents of heavy metal.

Purpose To investigate clinicopathological features, diagnosis and differential diagnosis of non-sebaceous lymphadenoma of the parotid gland. Methods The histopathological morphology, immunohistochemical profiles and clinicopathological features were an-alyzed in two cases of NSL, along with review the related literatures. Results Two patients were female adults. Microscopically, The tumor was a well-circumscribed mass surrounded by a fibrous capsule of variable thickness and comprised a mixture of proliferating epi-thelium accompanied by a prominent lymphoid component, reactive lymphoid follicles were found in lymphoid stroma. The epithelial component took the form of anastomosing trabeculae, glands, solid basaloid islands or cyst formation. The cysts and glands were lined with luminal cells and abluminal cells, filled with eosinophilic secretions with occasional histiocytes. The epithelial cell was no seba-ceous differentiation, significant cytological atypia and mitotic activity. A fibrous capsule with subcapsular sinus was seen around the mass in one case. Immunohistochemically, the abluminal cells were positive for p63, CK34βE12 and CK5/6, while the epithelial cells were positive for CK(AE1/AE3) and CK7. Conclusion NSL is a very rare benign of salivary gland, which occuring in the lymph node lesions are less reported, knowledge of the wide histological spectrum of this rare tumor is important in order to avoid misdiagno-sis, particularly as malignant tumor.

Objective To explore the expression of cyclooxygenase-1 (COX-1) in cervical carcinoma and its significance. Methods The pathological specimens were collected from 62 female patients, who were admitted to 307 Hospital of PLA from Jan. 1999 to Mar. 2005, including 31 cases of cervical carcinomas, 15 cases of cervical intraepithelial neoplasia and 16 cases of normal cervix. Surgery or biopsy was performed. Expression of COX-1 was detected by immunohistochemistry, and the relationship between COX-1 and clinicopathological feature was analyzed. Results The major sites of COX-1 expression were localized in cytoplasm, and next in cell membrane. Strongly positive expression of COX-1 was observed in cervical carcinomas, and weakly positive expression of COX-1 in cervical intra-epithelial neoplasia, with positive rates of 81% and 13%, respectively. There was no COX-1 expression in normal cervix. A significant difference was observed among these specimens. No obvious correlation was found between COX-1 expression and patient's age, tumor differentiation degree snd clinical stages. Conclusion Expression of COX-1 may serve as an auxiliary parameter for diagnosis, therapeutic scheme option, and prognosis of patients with cervical carcinoma.

Animals ; Female ; Injections, Intraventricular ; Male ; Maze Learning ; drug effects ; Memory ; drug effects ; Mice ; Mice, Inbred Strains ; Toluene ; administration & dosage ; toxicity

Objective To investigate the effect of valsartan,an angiotensinⅡtype 1 receptor (AT1 R)blocker,on radiosensitivity,invasive potential and proliferation activity of nasopharyngeal carcinoma cells(CNE-2)in vitro. Methods Radiosensitization of valsartan on CNE-2 cells in vitro was investigated by colony forming assay.Effect of ATl R blocker combined with radiation on invasive potential of CNE-2 cells was evaluated using 24-well Matrigel invasion chambers(Transwell).Apoptosis-inducing effect of valsartan combined with radiation on apoptosis of CNE-2 was identified by flowcytometry(FCM). Resuits When valsartan was given at 10-9.10-8 and 10-7 mol/L combined with radiation,sensitivity enhancement ratios (SER)were 1.10,1.20 and 1.36.and the invasive inhibition rates were 8.11%,16.49%and 16.77%,respectively.The SER of valsartan on CNE-2 distinctly increased when the exposure time was increased.After 24 h exposure to 10-8 mol/L valsartan combined witIl radiation.the apoptosis rate was 1.89%±0.09%,which was higher than 1.62%±0.06%in radiation alone group(t=4.79.P＜0.05). Conclusions AT1 R blocker valsartan combined with radiation can significantly inhibit the proliferation activity of nasophar,cngeal carcinoma cells in vitro in a dose- and time-dependent manner.Valsartan combined with radiation can potently inhibit the invasive potential of CNE-2.which may be involved in the mechanism of valsartan treatment in vivo.

AIM:To detect and compare the longitudinal mitral annulus diastolic velocity and time interval changes by pulsed Doppler tissue imaging(DTI)in patients with angina pectoris(AP)and myocardial infarction(MI),and to explore the value of mitral annulus diastolic velocities and time intervals for evaluation of global left ventricular diastolic dysfunction.METHODS:Fifty patients with established coronary artery disease were divided into AP group(16 cases)and MI group(34 cases).Sixteen age-matched healthy individuals served as the control group.The septum,lateral,anterior and inferior walls of the mitral annulus were displayed,and selected for DTI spectrum sampling.Peak early and late diastolic velocities and their ratio,time to the onset and peak of the early diastolic wave,and regional isovolumic relaxation time were measured,and the average values of the four mitral annular sites were calculated and presented as Em,Am,Em/Am,QEm,TEm and IVRTm,respectively.RESULTS:Compared with the control group,Em and Em/Am were significantly lower in both the AP and the MI groups(P＜0.01).Em was even lower in the MI group than that in the AP group(P＜0.01).QEm,TEm and IVRTm were significantly longer in the AP and the MI groups than those in control group(P＜0.01 or P＜0.05).IVRTm was even longer in the MI group than that in AP group(P＜0.01).IVRTm had significantly negative correlation with Em(r=-0.64,P＜0.01).CONCLUSION:Em,Em/Am,QEm,TEm and IVRTm as measured by pulsed DTI may be promising indexes for quantitative assessment of global left ventricular diastolic dysfunction in patients with coronary artery disease.Em and IVRTm may indicate the severity of ischemic myocardial damage.

BACKGROUND: Ureaplasma urealyticum may cause female genital tracts infection and lead sterility, infertility and spontaneous abortion. But it still is not clear whether Ureaplasma urealyticum is one of the factors responsible for fetal malformation.OBJECTIVE: To investigate whether Ureaplasma urealyticum is one of the key factor responsible for fetal malformation.DESIGN: Non-randomized observation of compromised children and their parents with concurrent control.SETTING: The department of immunology and microbiology of a medical college.PARTICIPANTS: Totally 16 malformed fetuses(3 female and 13 male cases) and their parents were chosen from the family seeking pregnancy care in the Department of Gynecology and Obstetrics of the First Affiliated Hospital of Luzhou Medical College and Luzhou First People's Hospital from 1995 to 1997.METHODS: Ureaplasma urealyticum detection was performed in 16 samples of the umbilic blood of the malformed fetuses, sperms of the father, and cervical mucus of the mother who conceived the malformed fetus. The 11 couples positive for Ureaplasma urealyticum were treated with macrolides and aminoglycoside antibiotics and followed up for the outcome of the following pregnancy.MAIN OUTCOME MEASURES: The relation between Ureaplasma urealyticum infection and fetal malformation was examined.RESULTS: Totally 11 of the 16 umbilical blood samples(69% ) were positive for Ureaplasma urealyticum, and serological tests of parents in the 11 positive cases detected rubella virus, cytomegalovirus or Toxoplasma gondii antibodies, nor was abnormality found in chromosomal examination. The following pregnancies and delivery were followed up in 4 women, and the babies showed no functional or organic abnormities with good development till the age of 2 years.CONCLUSION: Female genital tract Ureaplasma urealyticum infection is related to fetal malformation, which provides evidence to support interventions of the occurrence of fetal malformation.

Objective To investigate the alternation of insulin -like growth factor -Ⅱ( IGF-Ⅱ) gene promoter P4 methylation status in hepatocellular carcinoma ( HCC) and explore its relationship with expression of P4 mRNA levels.Methods Liver specimens of 43 patients with HCC and normal liver specimens of 9 control patients were collected in operation .Tissue DNA and total RNA were extracted from these specimens .IGF-Ⅱ P4 methylation status and P4 mRNA expression levels were detected .Results (1)The incidence of IGF -ⅡP4 methyl-ation in HCC group was significantly lower than that in normal liver specimens (16.28%vs 88.89%,χ2 =19.12,P<0.01).(2)The expression level of IGF -ⅡP4 mRNA in HCC group was significantly higher than that that in normal liver specimens[(0.96 ±0.74) vs (0.25 ±0.19),t=5.48,P<0.01].(3)In HCC group,the IGF-Ⅱ P4 mRNA expression level with hypomethylation gene was significantly higher than that without hypomethylation gene [(1.18 ± 0.76) vs (0.32 ±0.27),t=5.28,P<0.01].Conclusion The hypomethylation alternation of IGF -Ⅱ P4 gene promoter which is accomplished by up -regulate P4 mRNA expression has a close relationship with HCC .

The mandibular canine usually has a single-root with a single canal.A case of a Hui nationality patient who has a mandibular ca-nine with two root canals is reported in this paper.

Objective To compare the surgical outcomes between laparoscopic and open surgeries in treatment of ectopic oviduct pregnancy, and investigate the clinical value of laparoscopic surgery. Methods Two hundred and forty-six patients with ectopic oviduct pregnancy in our hospital from June 2009 to March 2013 were retrospectively analyzed. 134 cases were treated with laparoscopic operation and 112 with open surgery. Some parameters such as operative time, blood loss, usage of pain-killer, hospital stay were compared between both groups. Results All operations were successful. Laparoscopic surgery was shown to be superior to open operation in the parameters of operative time, blood loss, usage of pain-killer and hospital stay ( < 0.05) . Conclusion Compared with open operation, laparoscopic surgery has the advantages of less trauma and rapid postoperative rehabilitation. It may become the first line treatment for ectopic oviduct pregnancy.