Effect of heparanase on the adhesion and invasion ability of hepa-toma carcinoma cells / 中国肿瘤临床

Objective:To explore the effect of heparanase (HPSE) on the cell adhesion and invasion ability of hepatoma carcino-ma (HC) cell. Methods:HPSE expressions in human HC cell lines (BEL-7402, HepG2, and HCCLM3) were measured by real-time re-verse transcriptase-polymerase chain reaction (RT-PCR) and Western blot analysis. Four recombinant miRNA vectors, pcD-NATM6.2-GW/EmGFP-miR-HPSE (pcDNA-miR-HPSE), were constructed and transfected into HCCLM3 cells. Full-length cDNA of HPSE gene was cloned into pIRES2-EGFP vector and transfected into HepG2 cells. Transfection efficiency was observed with fluores-cence microscope. HPSE expressions in transfected cells were measured by real-time RT-PCR and Western blot analysis. Adher-ence ability was determined with microplate reader, and invasion and migration abilities were detected with Transwell chambers. Re-sults:Both HPSE mRNA and protein relative expression levels were higher in the three types of HC cells than those in normal hepato-cyte (P<0.05). HPSE had the highest expression level in HCCLM3 cells and the lowest expression level in HepG2 cells (P<0.05). All five recombinant vectors met the experimental requirements. The transfection efficiencies were 75%-85%. The four miRNA vectors, pcDNA-miR-HPSE, significantly decreased HPSE expression in transfected HCCLM3 cells (P<0.05), and pcDNA-miR-HPSE-1 showed the best interference effect (P<0.05). Plasmid pIRES2-EGFP-HPSE increased HPSE expression in transfected HepG2 cells (P<0.05). After pcDNA-miR-HPSE-1 was transfected, the HCCLM3 cell adherence rate and the cell invasion and migration numbers dropped by almost 50%(P<0.01). After transfection of pIRES2-EGFP-HPSE, the HepG2 cell adherence rate and the cell invasion and migration numbers increased by nearly 40%(P<0.05). Conclusion:Different HPSE vectors could regulate bi-directionally the adher-ence, invasion, and migration abilities of transfected HC cells. HPSE may be related with adherence aside from invasion of HC cell.

Percutaneous microballoon compression for trigeminal neuralgia using Dyna-CT.

Percutaneous microballoon compression (PMC) is a well-established technique for treatment of trigeminal neuralgia (TN). However, direct puncture of the foramen ovale (FO) is sometimes difficult and there have been well-reported complications from cannulating the FO. We describe our experiences in using Dyna-CT for cannulating the FO and determining balloon position and volume. Dyna-CT was used to perform image reconstruction in 21 cases. The optimal working projection was generated and further fluoroscopic data were used to determine the needle's relationship to the foramen during puncture. Furthermore, the balloon position and three-dimensional shape were verified by Dyna-CT during balloon compression. The balloon volume and puncture angle were further calculated. Patients' prognosis was further discussed. Dyna-CT allowed quick, safe, and easy cannulation of the FO. It provided three-dimensional images which were more elaborate than the classic 'pear-shaped' images for determining correct positioning in 21 cases. The volume of the flattened balloon ranged from 568.2 mm(3) to 891.4 mm(3) with an average of 775.9 mm(3). The angle of introducing the cannula ranged from 15.17°-35.48° rotation to the midline with an average of 26.24° and 38.47°-51.89° angulation to the Reid line with an average of 46.09°. All the patients were pain free after PMC. Four patients had resolvable masseter weakness and fine touch loss. There was no recurrence of TN during follow-up. Dyna-CT demonstrated three advantages in assisting PMC. Firstly, the FO can be better visualized irrespective of the patient's position. Secondly, needle correction or insertion can be performed much more easily because of the direct fluoroscopic control. Thirdly, the needle position, balloon position, balloon configuration and the volume of the inflated balloon are more reliably determined. The use of dyna-CT provided an assisted method to PMC with a low incidence of complications and good prognosis.

Endovascular treatment of unruptured A1 segment aneurysms.

Aneurysms of the A1 segment of the anterior cerebral artery (A1A) are rare and challenging to treat. Less information is available regarding their management by endovascular approach. We evaluated our experience of endovascular treatment in 15 patients with unruptured A1As. We retrospectively reviewed unruptured A1As treated by embolization at our hospital. The clinical data and angiographic results were reviewed. A special technique involving shaping microcatheter tips was used for catheterization. From September 2009 to December 2012, 15 patients presenting with unruptured A1As were identified. All the patients were treated by selective embolization including five patients with balloon-assisted coiling (BAC) or stent-assisted coiling (SAC). These adjunctive techniques were used to catheterize the sac safely or to protect a branch at the neck. According to the location and direction of the aneurysm, "Z-shaped", "S-Shaped" or "U-Shaped" microcatheter tip shaping was used for microcatheter positioning and stabilization. All patients showed an excellent clinical outcome. A complete aneurysm occlusion was obtained in all the patients. Endovascular treatment of A1As is feasible and associated with good results. Because of their location and close relationship with perforators, endovascular treatment of A1As sometimes requires the use of BAC or SAC. The microcatheter tip shaping technique is very important for coiling. Our results suggest that endovascular treatment is a suitable therapeutic option for unruptured A1As when the aneurysm size is optimal for embolization.

Cytotoxicity of GS and IL-2 Activated PBMC to Malignant Glioma Cells / 中国肿瘤生物治疗杂志

Objective: To investigate a new method for improving the therapeutic effect on malignant glioma. Methods: A new type of killer cells, named GS-LAK, was induced by means of costimulating the peripheral ginsenoside(GS) and interleukin-2 (IL-2). Comparing with control group-LAK cells, cytotoxicity of GS-LAK cells against malignant glioma cells(BT325) was examined with MTI method. Results: It showed that GS-LAK cells exhibited some advantages over LAKcells in proliferation, cytotoxicity, as well as the utilizing of IL-2. Conclusion: The application of GS-LAK cells mightopen a new prospect to clinical therapeutic approach to malignant glioma.