Generation and characteristics of hollow structured optical fields based on multiple off-axis vortices.

In this paper, various hollow structured optical fields are generated by skillfully adjusting the number and positions of multiple off-axis vortices loaded in a Gaussian beam. The focal-field characteristics of the generated hollow structured optical fields after passing through an ordinary lens are studied based on the scalar diffraction theory. Firstly, a variety of hollow structured optical fields are theoretically simulated by adjusting the number and positions of multiple off-axis vortices loaded in the Gaussian beam.

[Identification of metastasis-associated proteins of ovarian cancer by proteomics].

Objective: To investigate the differenal protein expression profiles of ovarian tumor cell lines with distinct metastatic abilities.

Methods: The ovarian cancer cell line HO8910 and HO8910pm, derived from same parental cells but exhibited different metastatic ability, were investigated by two-dimensional gel electrophoresis (2-DE)-MALDI-TOF-MS proteomic approach.

Results: Thirty-nine proteins were detected by 2-DE to have expression disparity levels over 2 folds between two cell lines.

Proteomics-based analysis of a pair of glioma cell lines with different tumor forming characteristics.

Glioma is the most common malignant disease in the brain, and recurrence is the main cause of death from this disease. Tumor recurrence involves multiple steps, and requires the accumulation of the altered expression of many different proteins. Identification of the recurrence associated protein profile in glioma cell lines will be helpful in clarifying the molecular mechanisms underlying glioma recurrence.

[Poorly-immunogenic tumor is capable of inducing proliferation of CD4 (+) CD25 (+) regulatory T-lymphocytes in vitro].

Objective: To investigate the distribution of regulatory T-lymphocytes in the splenocytes cocultured with syngeneic low-immunogenic tumor cells, as compared with that of highly-immunogenic tumor cells, to investigate the mechanism underlining tumor evasion.

Methods: Three different immunogenic tumor cells were cocultured with syngeneic splenocytes individually to mimic cancer immunity in vitro. The proliferation response of splenocytes was measured by thymidine incorporation.

[Expression of IgVH and B7-1 in proteome of the human colorectal carcinoma cell lines].

Objective: To conduct a proteomic analysis of human colorectal carcinoma cell lines LS174T and SW480 by two-dimensional electrophoresis (2-DE) and matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF-MS).

Methods: The total proteins of human colorectal carcinoma cell lines LS174T and SW480 were separated with 2-DE using immobilized pH gradient strips and analyzed by MALDI-TOF-MS to obtain peptide mass fingerprints (PMFs). Proteins were identified by using Mascot software to search protein databases.

Identification of proteins of human colorectal carcinoma cell line SW480 by two-dimensional electrophoresis and MALDI-TOF mass spectrometry.

Aim: To conduct the proteomic analysis of human colorectal carcinoma cell line, SW480 by using two-dimensional electrophoresis (2-DE) and matrix-assisted laser desorption /ionization-time of flight mass spectrometry (MALDI-TOFMS).

Methods: The total proteins of human colorectal carcinoma cell line, SW480 were separated with 2-DE by using immobilized pH gradient strips and visualized by staining with silver nitrate. The gel images were acquired by scanner and 2-DE analysis software, Image Master 2D Elite.

Proteomic analysis of differentially expressed proteins between metastatic and non-metastatic human colorectal carcinoma cell lines.

Objectives: To explore the expressions of metastasis-related proteins between metastatic LS174T and non-metastatic SW480 human colorectal carcinoma cell lines.

Methods: Two-dimensional gel electrophoresis (2-DE) was applied to separate the total proteins of cells. The silver-stained gels were analysed by 2-DE software Image Master 2D Elite.

[Study of immune responses induced by human papillomavirus type 18 L1-E6 and L1-E7 chimeric gene DNA vaccines in mice].

Aim: To examine the humoral and cellular immunoresponses induced by HPV18 L1-E6 and L1-E7 chimeric gene DNA vaccines in mice.

Methods: 54 BALB/c mice were divided into 9 groups randomly, and then vaccinated with various recombinant plasmids(pVAX1-L1-E6M3 or pVAX1-L1-E7M3) and immune adjuvants (pLXHDmB7-2 or LTB) through different administration routes (intramuscular or intranasal). After the third inoculation, blood samples were taken to measure specific antibody, and footpad swelling test was used to detect delayed-type hypersensitivity(DTH).

[Study on the preliminary purification and bioactivity of recombinant human TNF-alpha mutein 471].

Aim: To purify preliminary recombinant human TNF-alpha mutein 471 and detect its bioactivity on the basis of the TNF-alpha mutein 471 expressed in prokaryotic express system.

Methods: The expression of recombinant human TNF-alpha mutein 471 in engineering bacteria strains E.coil was induced under the condition of optimal fermentation and expression.

[Construction and expression of eukaryotic expression plasmid pcDNA3.1/hIL-18].

Aim: To construct an eukaryotic expression plasmid pcDNA3.1/hIL-18 and express it in mammalian cells.

Methods: cDNA encoding mature hIL-18 was cleavaged by enzyme digestion from mesomeric clone vector pGEM-T/hIL-18 and inserted into an eukaryotic expression plasmid pcDNA3.

Highly efficient expression, purification of recombinant LTB protein and its activity against mucosal immunoadjuvant by nasal immunization.

Objective: To develop an efficient expression, purification system of recombinant Escherichia coli heat-labile enterotoxin B subunit (rLTB) and study its activity against mucosal immunoadjuvant by nasal immunization.

Methods: A recombinant, pMMB68-LTB was generated by cloning the LTB cDNA fragment into an expression vector (pMMB68) and transformed it into the host strain marine vibrio VSP60. The relevant target protein was identified using SDS-polyacrylamide gel electrophoresis (SDS-PAGE) and Western blot.

Recombinant human B7.2 IgV-like domain expressed in bacteria maintains its co-stimulatory activity in vitro.

Objective: To investigate which of the two immunoglobulin (Ig)-like domains, the immunoglobulin variable region homologous domain IgV (hB7.2 IgV) and the immunoglobulin constant region homologous domain IgC (hB7.2 IgC) on the human B7.