ABSTRACT
OBJECTIVE@#To study the association of CT perfusion imaging parameters with plasma level of transforming growth factor-β1 (TGF-β1) and vascular endothelial growth (VEGF) in patients with non small cell lung cancer (NSCLC).@*METHODS@#A total of 67 patients with NSCLC (NSCLC group) and 64 patients with benign lesion (control group) were given with CT perfusion imaging to obtain blood flow, blood volume, mean transit time, time to peal and permeability surface through CT perfusion software. The plasma levels of TGF-β1 and VEGF were tested by ELISA. The relationship between plasma levels of TGF-β1, VEGF and CT perfusion imaging parameters were analyzed.@*RESULTS@#CT perfusion imaging parameters and the plasma levels of TGF-β1 and VEGF of NSCLC group were significantly higher than the control group (P < 0.05), while CT perfusion parameters and the levels of TGF-β1 and VEGF in NSCLC group showed significant difference in different tumor node metastasis stages (P < 0.05). Correlation analysis showed that the level of plasma TGF-β1 and VEGF were positively correlated with blood flow, blood volume, and mean transit time (P < 0.05), and negatively correlated with time to peal (P < 0.05). There was no significant correlation between TGF-β1 and VEGF with the permeability surface.@*CONCLUSIONS@#CT perfusion imaging parameters in patients with NSCLC is closely associated with plasma TGF-β1, VEGF and its biological characteristics. CT perfusion imaging is a convenient method to detect tumor blood perfusion.
ABSTRACT
Objective: To study the association of CT perfusion imaging parameters with plasma level of transforming growth factor-β1 (TGF-β1) and vascular endothelial growth (VEGF) in patients with non small cell lung cancer (NSCLC). Methods: A total of 67 patients with NSCLC (NSCLC group) and 64 patients with benign lesion (control group) were given with CT perfusion imaging to obtain blood flow, blood volume, mean transit time, time to peal and permeability surface through CT perfusion software. The plasma levels of TGF-β1 and VEGF were tested by ELISA. The relationship between plasma levels of TGF-β1, VEGF and CT perfusion imaging parameters were analyzed. Results: CT perfusion imaging parameters and the plasma levels of TGF-β1 and VEGF of NSCLC group were significantly higher than the control group (P < 0.05), while CT perfusion parameters and the levels of TGF-β1 and VEGF in NSCLC group showed significant difference in different tumor node metastasis stages (P < 0.05). Correlation analysis showed that the level of plasma TGF-β1 and VEGF were positively correlated with blood flow, blood volume, and mean transit time (P < 0.05), and negatively correlated with time to peal (P < 0.05). There was no significant correlation between TGF-β1 and VEGF with the permeability surface. Conclusions: CT perfusion imaging parameters in patients with NSCLC is closely associated with plasma TGF-β1, VEGF and its biological characteristics. CT perfusion imaging is a convenient method to detect tumor blood perfusion.
ABSTRACT
<p><b>OBJECTIVES</b>To screen proteins in hepatocytes interacting with hepatitis B virus surface antigen middle protein (MHBs) with yeast-two hybrid technique for studying the biological functions of MHBs.</p><p><b>METHODS</b>Polymerase chain reaction (PCR) was used to amplify the gene of MHBs from the plasmid A7 containing the whole fragment of adr subtype of HBV and the PCR product was cloned into pGEM-T vector and then evaluated by sequencing. The gene of MHBs was cut by EcoRI and BamH I from pGEM-T vector and then cloned into the yeast expression plasmid pGBKT7. MHBs bait plasmid was constructed by ligating MHBs gene with yeast expression vector pGBKT7 with yeast-two hybrid system 3 and then was transformed into yeast AH109 (a type). The transformed yeast cells were mated with yeast Y187 (alpha type) containing liver cDNA library plasmid in 2 x YPDA medium. Diploid yeast cells were plated on synthetic dropout nutrient medium (SD/-Trp-Leu-His-Ade) and synthetic dropout nutrient medium (SD/-Trp-Leu-His-Ade) containing X- alpha -gal for selecting and screening. After extracting and sequencing the plasmid from true positive blue colonies, the results were analyzed by bioinformatics.</p><p><b>RESULTS</b>A pGBKT7- MHBs yeast expressed vector was successfully constructed. Two colonies were sequenced. One colony was Homo sapiens aldolase B fructose-bisphosphate, the other was a new gene with unknown function, which was named MHBs-binding protein 1.</p><p><b>CONCLUSION</b>MHBs gene was successfully cloned. Two genes of MHBs interacting proteins in hepatocytes were obtained by yeast-two hybrid system 3. Our results brought some new clues for studying the biological functions of MHBs and the mechanisms of HBV carcinogenesis.</p>