Objective To explore the effect of low frequency vibration (LFV) on osteogenesis of bone marrow stromal cells (BMSCs) and OPG mRNA,RANKL mRNA expression.MethodsBMSCs from 10-week-old female SD rats were cultured and randomly divided into 2 groups:control group and vibration group.The BMSCs of vibration group was given LVF with 20 Hz,0.25 g,2 times/d,10 min/time for 7 days.The LFV was given from the eleventh day after BMSCs cultured.The osteogenesis and OPG mRNA,RANKL mRNA of all BMSCs in two group were tested at the end of LFV.ResultsCompared to the control groups,the BMSCs growth and proliferation improved in vibration group,but the alkaline phosphatase (ALP)activity and the number of mineral nodule did not changed significantly.The OPG mRNA elevated in vibration group,while the RANKL mRNA showed no change.ConclusionThe LFV may increase the growth and proliferation of BMSCs,which is attributed to the elevated OPG gene expression.The osteogenesis improved no significance,which may be associated with the too short vibration time.

This study is to explore the amelioration of piperine on chronic acute combining stress rat with depression-like behavior, visceral sensitivity, and its effect on the expression of serotonin (5-HT) and synaptophysin. Forty two SD rats were divided into seven groups: blank group, model group, piperine (12.5, 25, 50 and 100 mgkg-1, ig) and imipramine (10 mgkg-1, ip) groups. The rat model of irritable bowel syndrome was established by chronic acute combining stress, and then to evaluate depression-like behavior and visceral sensitivity. The expressions of 5-HT and synaptophysin in the hippocampus and colon were determined by high performance liquid chromatography (HPLC) and Western blotting, respectively. The duration of immobility of IBS rat in the forced swimming test had been significantly increased, the sucrose consumption of IBS rat had been reduced and visceral sensitivity was obviously elevated in the IBS model group as compared with those in the normal control group (P<0.05, P<0.01). As compared with those in the normal control group, the expression of 5-HT significantly decreased, 5-HIAA/5-HT ratio significantly increased in the hippocampus of IBS model group (P<0.05), but opposite presentations were noted in the colon (P<0.05). As compared with that in the normal control group, the synaptophysin expression in the hippocampus decreased significantly but obviously increased in the colon (P<0.05). Piperine improved the behavior of IBS rats, and reversed the levels of 5-HT and 5-HIAA, and 5-HIAA/5-HT proportion in the hippocampus and colon (P<0.05); besides, they significantly reverse the synaptophysin level in the hippocampus and colon (P<0.05). The presence of depression and visceral sensitivity had been changed in IBS rats, with abnormal expression of 5-HT and synaptophysin in the brain-gut system. Piperine can ameliorate the changes of the behavior and regulation of serotonin and synaptophysin expression in IBS rat model.
Alkaloids ; isolation & purification ; pharmacology ; Animals ; Benzodioxoles ; isolation & purification ; pharmacology ; Colon ; metabolism ; Hippocampus ; metabolism ; Hydroxyindoleacetic Acid ; metabolism ; Irritable Bowel Syndrome ; metabolism ; physiopathology ; Male ; Motor Activity ; drug effects ; Piper nigrum ; chemistry ; Piperidines ; isolation & purification ; pharmacology ; Plants, Medicinal ; chemistry ; Polyunsaturated Alkamides ; isolation & purification ; pharmacology ; Random Allocation ; Rats ; Rats, Sprague-Dawley ; Serotonin ; metabolism ; Synaptophysin ; metabolism

Objective To evaluate the clinical significance of the diameter of the esophageal hiatus on multislice spiral CT(MSCT)and to present the MSCT manifestations of esophageal hiatus hernia (EHH).Methods(1)The distance between diaphragmatic crura(DDC),which indicated the diameter of esophageal hiatus,was measured in 140 normal adult patients on their thoracic and/or abdomenal CT images.(2)The DDC of 56 patients with EHH diagnosed by barium examination was measured on MSCT, and the MSCT findings were analyzed retrospectively.Results(1)The DDC of 140 normal adult cases were(13.44?4.41)mm on average and increased with age.The mean DDCs of patients under the age of 59 year-old(80 cases)and over 60-year-old(60 cases)were 11.03?2.10 mm and 16.67?4.64 mm respective]y,there was a significant difference(t=8.762,P

Objective： The current study was designed to evaluate the treatment results of nasopharyngeal carcinoma by conformal radiotherapy. Methods： From September 1997 to February 2000, a total of 41 cases of recurrent nasopharyngeal carcinoma were treated by conformal radiotherapy. Among them, 27 cases were treated by late-course hypofraction conformal radiotherapy with the dose of 20- 24 Gy at 80％ isodose, 4- 7 Gy per time, following routine radiotherapy of 39 Gy/30f/3weeks. Fourteen cases received total-course conformal radiotherapy with the dose of 59.8 Gy/46f/4.6weeks at 90％ isodose. Results： The reference isodose curves conform to the target in three dimensions in conformal radiotherapy. The acute radiation mucositis, cranial nerve paralysis and trismus incidence were similar in two groups, however, in the hypofractionation group 22％ developed necrosis of nasopharyngeal mucosa, 3.7％ developed reduced optic nerve lesion, whereas none of the hyperfractionation group had these complications. The tumor response rate were both 93％ for two groups. Conclusion： Hyperfraction conformal radiotherapy is effective in the treatment of recurrent nasopharyngeal carcinoma and has relatively lower incidence of radiation complication.

Objective Clinical significance of using ELISA to determine ?-amyloid(A?)_(1-42) antibody levels in the sera of patients with Alzheimer's disease(AD).Methods 96 wells PVC plate was coated with A?_(1-42)peptide.Serum of AD patient was competing with mouse A?_(1-42)monoclonal antibody in this assay.The second antibody was horseradish peroxidase(HRP)conjugated goat anti-mouse IgG.Serum A?_(1-42)antibody levels were determined by ELISA.Results The sensitivity of this assay was about 1 ng/ml.The recovery rate of this test was between 96.5% and 104.7%.The residual A?_(1-42)antibody levels in human serum or horse serum after A?_(1-42)antibody was removed by absorption were less than 1 ng/ml. Serum A?_(1-42)antibody levels in 37 AD patients[(5.1?1.9)ng/ml]were remarkably lower than those in normal people[(12.6?3.3)ng/ml,P

Animals ; Animals, Newborn ; Female ; Hippocampus ; physiopathology ; Hypoxia-Ischemia, Brain ; physiopathology ; Long-Term Potentiation ; Male ; Maze Learning ; Memory ; Rats ; Rats, Wistar

OBJECTIVETo analyze the CT image features of pneumonic-type lung cancer and to reduce misdiagnosis.

METHODSThe CT findings of 46 patients with pneumonic-type lung cancer were retrospectively reviewed, and CT image in the differential diagnosis of this special kind of disease was evaluated.

RESULTSAccording to the extent of lesion, these cases were divided into two groups: multi-lobe consolidation group and single lobe consolidation group. The lesions in the latter group located in the upper, middle or lower lobe, respectively. Twenty-nine cases had homogeneous consolidation lesion, 14 cases showed single or multiple cysts and cavities in the lesions, 3 cases exhibited localized low density in the lesion. Forty-one cases shown the sign of air bronchogram with presentation of narrow air bronchogram in 25 of those. Forty cases showed well or ill defined ground-glass opacitiy surrounding the consolidation lesion. Fifteen cases had multi-nodules or opacities distributed in centrilobular or centric bronchiolar location. Of the 30 patients who received contrast medium, 23 showed distinct enhancement, and 7 showed indistinct enhancement with a positive CT angiogram.

CONCLUSIONCT findings including lower lobe distribution, homogeneous consolidation, narrow air bronchogram, well defined ground-glass and CT angiogram are helpful in differentiating pneumonic-type lung cancer from various kinds of infection. However, most of CT manifestations of pneumonic-type lung cancer are not specific. Therefore, it's necessary to combine CT findings with other clinical data when making diagnosis.

Adenocarcinoma ; diagnostic imaging ; Adenocarcinoma, Bronchiolo-Alveolar ; diagnostic imaging ; Adenocarcinoma, Mucinous ; diagnostic imaging ; Adenocarcinoma, Papillary ; diagnostic imaging ; Adult ; Aged ; Diagnosis, Differential ; Diagnostic Errors ; Female ; Follow-Up Studies ; Humans ; Lung ; diagnostic imaging ; Lung Neoplasms ; diagnostic imaging ; Male ; Middle Aged ; Pneumonia, Bacterial ; diagnostic imaging ; Radiographic Image Enhancement ; Tomography, X-Ray Computed ; methods ; Tuberculosis, Pulmonary ; diagnostic imaging

BACKGROUNDBrain-derived neurotrophic factor (BDNF) is a stress-responsive intercellular messenger modifying hypothalamic-pituitary-adrenal (HPA) axis activity. The interaction between stress and age in BDNF expression is currently not fully understood. This study was conducted to observe unpredictable stress effect on behavior and BDNF expression in CA3 subfield (CA3) and dentate gyrus of hippocampus in different aged rats.

METHODSForty-eight Wistar rats of two different ages (2 months and 15 months) were randomly assigned to six groups: two control groups and four stress groups. The rats in the stress group received three weeks of unpredictable mild stress. The depression state and the stress level of the animals were determined by sucrose preference test and observation of exploratory behavior in an open field (OF) test. The expressions of BDNF in CA3 and dentate gyrus of the hippocampus were measured using immunohistochemistry.

RESULTSAge and stress had different effects on the behavior of different aged animals (age: F = 6.173, P < 0.05, stress: F = 6.056, P < 0.05). Stress was the main factor affecting sucrose preference (F = 123.608, P < 0.05). Decreased sucrose preference and suppressed behavior emerged directly following stress, lasting to at least the eighth day after stress in young animals (P < 0.05). The older stress rats showed a lower sucrose preference than young stress rats (P < 0.05). Older control rats behaved differently from the younger control animals in the OF test, spending more time in the central square (P < 0.05), exhibiting fewer vertical movements (P < 0.05) and less grooming (P < 0.05). Following exposure to stress, older-aged rats showed no obvious changes in vertical movement and grooming. This indicates that aged rats were in an unexcited state before the stress period, and responded less to stressful stimuli than younger rats. There was significantly lower BDNF expression in the CA3 and dentate gyrus regions of the hippocampus following stress in both age groups (P < 0.05), a reduction that was still present at the eighth day after stress (P < 0.05). Stress and age were the main factors affecting the expression of BDNF (F = 9.408, P < 0.05; F = 106.303, P < 0.05). The aged stress group showed lower BDNF expression compared to the young stressed group at every testing time point.

CONCLUSIONStress has age-dependent effects on behavioral responses and hippocampal BDNF expression in rats.

Age Factors ; Animals ; Behavior, Animal ; Brain-Derived Neurotrophic Factor ; analysis ; genetics ; Chronic Disease ; Dentate Gyrus ; chemistry ; Exploratory Behavior ; Hippocampus ; chemistry ; Immunohistochemistry ; Rats ; Rats, Wistar ; Stress, Psychological ; metabolism ; psychology ; Sucrose ; administration & dosage

OBJECTIVESTo investigate prognostic effect of postoperative resection-margin status for intraoperatively positive resection margin in advanced gastric cancer and discuss the treatment choice for intraoperatively positive resection margins.

METHODSA retrospective study was investigated in 64 advanced gastric cancer patients with positive resection margin after potentially curative resection. The survival between 50 patients who was re-excised to a negative resection margin (NR group) and 14 patients who were left with positive resection margin (PR group) was compared. Prognostic factors were analyzed using univariate and multivariate Cox regression model analysis.

RESULTSThe median survival in the PR group was 17.0 months (95%CI: 11.6 - 22.4) as compared with 23.0 months (95%CI: 20.5 - 25.5) in the NR group (P = 0.045). However, resection-margin status lost significance on multivariate analysis. In the subgroup of D2 lymphadenectomy, the median survival in the PR group and NR group were 17.0 months (95%CI: 12.0 - 22.0) and 24.0 months (95%CI: 19.8 - 28.1) respectively; multivariate analysis further identified resection margin status as an independent prognostic factor.

CONCLUSIONSRe-excision for intraoperatively positive margin to negative margin improves the prognosis of the patients with advanced gastric cancer, and re-excision is the first choice when intraoperative frozen section detects a positive margin. Routine frozen section of resection margin should be mandatory in all advanced gastric cancer undergoing potentially curative surgery.

Female ; Follow-Up Studies ; Frozen Sections ; Gastrectomy ; methods ; Humans ; Male ; Middle Aged ; Multivariate Analysis ; Prognosis ; Proportional Hazards Models ; Retrospective Studies ; Stomach Neoplasms ; surgery

Two hundreds postmenopausal women with osteopenia, aged 45-80, were randomly divided into 4 groups, and received different drug interventions. After treatment for 12 months, the lumbar spine bone mineral density(BMD)and total hip BMD in alendronate group increased significantly(3.5% and 2.6%, both P＜0.05), the lumbar spine BMD raised 2.0% in selective estrogen receptor regulator group(P＜0.05). Bone turnover indices improved in both groups(all P＜0.05). No change in BMD or bone turnover indices was found in patients treated with active vitamin D3and calcium.