Application of SELDI-TOF-Ms technology in research of molecular markers of lung cancer / 上海交通大学学报（医学版）

Objective To explore the changes of proteomic spectra from plasma of patients with lung cancer or benign lung diseases and health controls in order to establish a primary diagnosis model of lung cancer. Methods The proteomic spectra from plasma of 108 patients with lung cancer, 40 patients with benign lung diseases and 22 healthy individuals were analysed by surface-enhanced laser desorption/ionization time of flight mass spectrometry ( SELDI-TOF-MS). The best decision tree model was established by cluster analysis and principal component analysis. Then the model was blindly validated by the protein of 21 patients with lung benign diseases and 47 patients with stage I lung cancer. Results Twenty-three significantly differentially expressed protein peaks were successfully detected (P <0.001). Blinded validation suggested that the accuracy for diagnosing lung cancer was 72. 06%, the sensitivity and specificity were 72. 34% and 71.43%, respectively, and the positive predictive value and negative predictive value were 85. 0% and 78. 95%, respectively. Conclusion SELDI-TOF-MS protein chip technology provides a new tool for the early diagnosis of lung cancer.

Study of the Effect and Functional Mechanism of Pine Pollen on Reducing the Blood-fat Level of the Experimental Mice / 医学研究杂志

Objective To study the effect of lecithin pollen on hyperlipidemia model experimental animals.Methods Mice were feed with high-fat feeds in order to establish the hyperlipidemia models.The contents of TC,TG and HDL-C in the serum of the mice were tested before the experiment and the mice were divided into 5 groups according to their TC level,induding the control group,the model group and 1.25,2.50and 3.75g/kg lecithin pollen groups.Lecithin pollen was given preventively for 30 days,and then the TC,TG and HDL-C level of the mice were retested.Results Compared with the model group, the TC level of the middle and high dose group decreased. The TG level of the high dose group also decreased and the HDL-C level of the high dose group increased. The difference was significant. Conclusion The lecithin pollen is effective in preventing the formation of hyperlipidemia in the experimental mice.

The Assay of Total Flavonoids Lecithin Pollen Pellet / 医学研究杂志

Objective To establish the method of assaying total flavonoids in Lecithin Pollen Pellet.Methods Suo-shi pheresis was wsed to detect wave length of 500nm with Eldrin being as control article and sodium nitrite-aluminum nitrate-sodium hydroxide as developer.Results There was good linear correlation between Absorbability A and Eldrin mass concentration C rangmg from 0 to 48?g/ml;Average recovery rate of spotting was 98.7%(RSD=1.41%).Conclusion With the character of handling simply,accurate result and good reproduction quality,the method was a scientific method for quality control of assaying effective composition Lecithin Pollen Pellet.

Vascular endothelial growth factor promotes hematogenous metastasis of cancer cells in patients with non-small cell lung cancer / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To evaluate the effect of vascular endothelia1 growth factor (VEGF) on the hematogenous metastasis of non-small cell lung cancer (NSCLC).</p><p><b>METHODS</b>The identification of lung cancer cells in the peripheral blood were carried out by cytological, immunohistocytologica1 and immunofluorecent stains respectively, following isolation of cytokeratin-expressing cells with magnetic activated cell sorting. The quantification of cancer cells in the blood was performed according to the established flow cytometric assay. The plasma VEGF was measured by commercially available ELISA kit.</p><p><b>RESULTS</b>The lung cancer cells in the blood, showing a remarkable nuclear polymorphism, expressed the epithelial marker cytokeratin and telomerase reverse transcriptase (hTERT). These cells were stained positive by an NSCLC-specific monoclonal antibody S5Al0-2, but negative by antibodies against CD34 and CD45 antigens. Using the flow cytometric assay, 44 cases (28.6%) of l54 NSCLC patients were found to have cancer cells in their blood, with the incidence of positive cases correlated with the stage of disease. The plasma VEGF level was significantly increased in NSCLC patients in comparison with healthy individuals and patients with benign pulmonary diseases. This level was correlated with the stages of disease in patients with adenocarcinoma. In patiens with cancer cells in their blood, a higher level of plasma VEGF was related with an increased number of cancer cells.</p><p><b>CONCLUSION</b>The plasma VEGF level is increased in NSCLC patients with approximate1y one fourth to have cancer cells in the peripheral blood. In these patients, increased VEGF level promotes hematogenous tumor metastasis, as indicated by a much higher number of cancer cells in the blood.</p>

Decline of dendritic cells in the peripheral blood of patients with non-small cell lung cancer and its relation to vascular endothelial growth factor / 中国肺癌杂志

<p><b>BACKGROUND</b>To detect dendritic cells (DC)in the peripheral blood and plasma concentration of vascular endothelial growth factor (VEGF) of patients with non-small cell lung cancer (NSCLC) and to evaluate their relationship.</p><p><b>METHODS</b>The quantitation of DC in the blood was performed in 55 patients with NSCLC, 13 patients with pulmonary benign diseases, and 12 healthy volunteers by a novel flow cytometric assay. The concentration of VEGF in the plasma was measured by ELISA kit.</p><p><b>RESULTS</b>No significant difference was found in the levels of DC and VEGF between the patients with pulmonary benign diseases and healthy volunteers (P>0.05). In comparison with subjects of healthy volunteers and pulmonary benign diseases, the level of DC was significantly decreased, while that of VEGF was significantly increased in the patients with NSCLC(P < 0.05 to 0.01). The levels of DC and VEGF in the peripheral blood of NSCLC were closely associated with TNM stages and lymph node metastasis. However, no correlation was found among the levels of DC and VEGF and age, gender, cell differentiation and histologic classification. There was a negative correlation between the VEGF concentration and the DC counts.</p><p><b>CONCLUSIONS</b>The decline of DC count in peripheral blood and the enhancement of plasma VEGF are remarkably related to the malignancy of NSCLC. And VEGF overexpression may be one of mechanisms of DC maturation and differentiation inhibition in patients with NSCLC.</p>