BACKGROUND: Benzo[a]pyrene injures central and peripheral nerves at a certain degree. The study is at an initial phase concerning to the neurotoxicity of benzo[a]pyrene allied with other toxic objects.OBJECTIVE: Molecular biological technique integrated with neuron culture were applied in the study of benzo[a]pyrene and lead applied separately or in combination on neurotoxicity and nuclear DNA damage in vitro.DESIGN: Repeated measure.SETTING: Teaching-Research Room of Labor and Hygiene of Chongqing Medical University and Laboratory of Thermobiology and Molecular Toxicology of Occupation Medical Institute of Tongji Medical College of Huazhong University of Science and Technology.MATERIALS: The experiment was performed in Laboratory of Thermobiology and Molecular Toxicology of Occupation Medical Institute of Tongji Medical College ofHuazhong University of Science and Technology from June to September 2003. Ten SD rats of 8-day old were employed and their brain tissues were prepared as primary cell culture object, which were divided into 10 culture groups, 5 culture dishes in each group. The managements were as follows in each group: [1] blank control; [2] solvent control[parallel management with equivalent dimethyl sulfoxide (DMSO) +liver microsome enzyme]; [3] lead group of low concentration (acetic lead 5 μmol/L) (No. 1 group); [4] lead group of high concentration (acetic lead 50 μmol/L) (No. 2 group); [5] benzo[a]pyrene group of low concentration (benzo[a]pyrene 5 μmol/L + liver microsome enzym) (No. 3 group); [6]benzo[a]pyrene group of high concentration (benzo[a]pyrene 50 μmol/L +liver microsome enzym) (No. 4 group); [7] lead of low concentration +benzo[a]pyrene of low concentration group (No. 5 group); [8] lead of low concentration + benzo[a]pyrene of high concentration group (No. 6 group);[9] lead of high concentration + benzo[a]pyrene of low concentration group (No.7 group); [10] lead of high concentration + benzo[a]pyrene of high concentration group (No. 8 group).METHODS: After stained poisoning for 90 minutes, trypsin digestion method was used for sample collection and trypan blue staining method was applied to assay cell survival rate in each group. Single-cell gel electrophoresis (SCGE) was used to determine the damage of nuclear DNA in each group.MAIN OUTCOME MEASURES: Neuronal survival rate and damage rate of nuclear DNA in poisoning with benzo[a]pyrene and lead either in separation or in combination.RESULTS: [1] Cell survival rates in various groups poisoned with benzo [a]pyrene and lead of two concentrations either in separation or combination were lower than the controls [poisoning group (44.14±4.80)% to(82.40±2.70)%, the controls (88.44±2.53)% to ( 90.12±2.23)%, P ＜ 0.05to 0.01]. [2] Degrees of nuclear DNA damage in single poisoning group with benzo[a]pyrene of high concentration, lead of low concentration + benzo[a]pyrene of high concentration, lead of high concentration + benzo[a]-pyrene of low concentration and lead of high concentration + benzo[a]pyrene of high concentration were higher than the controls [63% (19/30), 87%(26/30), 80% (24/30), 97% (29/30), 13% (4/30), 20% (6/30), P ＜ 0.01].CONCLUSION: Both benzo[a]pyrene and lead present neurotoxicity in vitro and coordinate with each other. The damage of benzo[a]pyrene is worse than lead in neuronal nuclear DNA cultured in vitro.

Objective To establish the method for content determination of total flavonoids and polysaccharides in Radix Codonopsis Lanceolatae from Mount Taishan.MethodsThe content of the total flavonoids was determined by UV spectrophotometry and the polysaccharide content was measured with the phenol-sulphuric acid method.ResultsThe optimal detective wavelength was 510nm for the total flavonoids.Satisfactroy linear relationship with the Absorbability was achieved when the mass concentration of rutin was within a range of 8～48?g/ml(r=0.9986).The average recovery rate was 99.31%(RSD=1.82%,n=5).The optimal detective wavelength was 490nm for the polysaccharides.There was good linear relationship between the Absorbability and the content of glucose in a range of 5～50?g/ml(r=0.9964) with an average recovery of 99.12%(RSD=1.49,n=4).ConclusionThis method is sensitive,simple and accurate,and it can be used for the quality control of Radix Codonopsis Lanceolatae from Mount Taishan.

Objective To research the value of CT perfusion imaging in diagnosing breast tumor .Methods 21 focuses in 17 cases withbreast tumorlike pathological changes diagnosed by molybdenum target examination were scanned by CT perfusion imaging . Cine model,0.5 s/circle ,5 mm in thickness?4,120 kV,60 mA,delayed time 10 s,scan time in all 50 s ,GE 4.2 workstation and perfusion 3 software were used ,the data of creating dynamic picture and the relative informations that image intention changes with time change were analyzed and every parameters related with perfusion were studied and analyzed statistically .Results Blood flow(BF),blood volume(BV),mean transit time(MTT) and permeability surface(PS) were (36.46?17.62)ml?min-1?100 g-1,( 13.76?8.59) ml/100 g,( 28.23?15.75) s and (16.45?12.36) ml?min-1?100 g-1.In cancer group,( 17.35?10.67)ml?min-1?100 g-1,( 4.63?3.47) ml/100 g,( 25.52?12.91) s and ( 3.57?3.36) ml?min-1?100 g-1 in benign lesion group,respectively,there was significant difference between two groups in BF,BV and PS(P

The original articles in recent years about solitary plasmacytomas of bone(SPB) were reviewed in terms of etiopathogenisis,diagnosis,therapy plan and prognosis.SPB is a rare tumor characterized by the uncontrolled proliferation of plasmocytes.After it is diagnosed by local biopsy and further immunocytochemistry test,the wide excision or thorough curettage in corporation with radiotherapy is the choice of treatment.The primary tumor size,the content and lasting time of M proteins or local recurrence evidence after properly treated are all closely correlated with SPB prognosis.SPB is a rare tumor with a tendency to grow into multiple myeloma.The correct diagnosis and treatmert in time and long-term fellow up are vital factors for prognosis.

In the present study the effects of electroacupuncture (EA) on substance P (SP), somatostatin (SOM) and serotonin (5-HT) immunoreactivity (IR) of APUD cells and nerve fibers in the pylorus and in the skin of "Zusanli" acupo- int of rats were studied using immunohistochemical technique. Forty rats were divided into 20 pairs, one of each pair for EA (bilateral "Zusanli" acupuncture for 20 min), the other one for control. After EA the pain threshold was mark- edly increased(P

0.05) was observed. Bcl 2 expression was related with differentiation of GC(P0.05).Conclusion: p53,bcl 2,c erbB 2 may be involved in the development of GC.

G protein-coupled estrogen receptor(GPER), as a newly discovered estrogen membrane protein-coupled receptor, has attracted much attention in endocrine metabolism research in recent years.Abnormal glucose and lipid metabolism and imbalance of inflammatory response mediated by GPER is one of the pathogenesis mechanisms of various endocrine and metabolic diseases.GPER is expected to become a new drug target for the treatment of coronary atherosclerosis, obesity and diabetes.This article briefly reviews the progress of GPER-mediated estrogen signaling pathway in terms of glucose metabolism, lipid metabolism and inflammation.

Behavior guiding teaching method is a new teaching method,It requires putting the emphasis on students'action of learning and thought,which can improve the whole quality of students'.Forensic toxicological analysis'is an important course in the department of forensic,and application of behavior guiding teaching method in the "Forensic Toxicological Analysis" is of help to students'ability development and good teaching results.

Objective To investigate the psychological status and related factors in patients with mainte-nance hemodialysis in Huzhou city.Methods 376 cases of maintenance hemodialysis were selected as the research subjects in Huzhou First People's Hospital.The anxiety and depression status in maintenance hemodialysis patients were investigated by issuing questionnaires.To study the relationship between anxiety and depression,gender,age, social support,nutritional status,complications,and in maintenance hemodialysis patients.At the same time,the quality of life was evaluated by SF -36 scale.Results Issuing 376 questionnaires,a total of 373 points,the effective recovery rate was 99.20%.In 373 patients,there were 182 patients (48.79%)with no depression,mild depression in 78 cases (20.91%),moderate depression in 59 cases (15.82%),severe depression in 54 cases (14.48%). 51.21% patients had different degree of depression.Of the 373 patients,there were 123 patients (32.97%)with no anxiety,mild anxiety in 141 cases (37.80%),mild and moderate anxiety in 55 cases (14.75%),moderate anxiety in 33 cases (8.85%),severe anxiety in 21 cases (5.63%).A total of 67.03% patients had different degrees of anx-iety.Huzhou city maintenance hemodialysis,female patients had depression rate of 80.70%,anxiety rate of 65.50%, which were significantly higher than the rate of depression 55.45%,anxiety rate 39.11% in male patients,the differ-ences were statistically significant (P <0.01 -0.05).In maintenance hemodialysis patients,the anxiety and depres-sion status gradually increased with age.Severe malnutrition in maintenance hemodialysis patients,the rate of depres-sion,anxiety rates were 80.65%,90.32%,the rates of depression,anxiety were 44.49%,61.81% in normal and mild malnutrition patients,the differences were statistically significant (all P <0.01).SF -36 scale showed that most of the patients with maintenance hemodialysis patients had poor quality of life,and the function was limited. Conclusion Maintenance hemodialysis patients,the general existence of anxiety and depression in the mental state in Huzhou city.Moreover,the psychological state of the patients is influenced by sex,age,nutrition status,and other factors.In clinical,it is needed to provide effective psychological intervention for patients to improve the quality of life,according to the psychological status and related factors of maintenance hemodialysis patients.

Tachycardia-induced cardiomyopathy (TIC) is defined as a kind of cardiomyopathy with cardiac dilatation and dysfunction secondary to sustained or recurrent tachyarrhythmia.Myocardial dysfunction can wholly or partially recover after control of the responsible tachyarrhythmia.TIC,a reversible acquired cardiomyopathy with generally benign prognosis,can occur at any age;however,it often proves to be unrecognized by most of pediatricians in clinical practices.Now,the clinical criteria,pathogenesis,characteristics,therapy and prognosis of pediatric TIC were summarized,so as to provide a clinical basis for early recognition and prompt therapy.