Pituitary adenoma is a serious disease that affects human health through interfering hypothalamus-pituitary-target organ axis systems.Proteomics is an effective approach to elucidate molecular mechanisms of a pituitary adenoma and discover effective biomarkers for a pituitary adenoma.A great progress has been made in the field of pituitary adenoma proteomics in the past ten years:(1) the use of laser capture microdissection,(2) functional pituitary adenoma proteomics (such as prolactinoma),(3) proteomics analysis of invasive characteristics of nonfunctional pituitary adenoma,(4) protein post-translational modifications including phosphorylation and tyrosine nitration,(5) the use of protein antibody array,(6) proteomics analysis of hormone isoforms,(7) serum proteomics and peptidomics,(8) integration of proteomics and other omics data,and (9) proposal of multi-parameter systematic strategy for a pituitary adenoma.

Differential proteome profiles of human lung squamous carcinoma tissue compared to paired tumor-adjacent normal bronchial epithelial tissue were established and analyzed by means of immobilized pH gradient-based two-dimensional polyacrylamide gel electrophoresis (2-D PAGE) and matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF-MS). The results showed that well-resolved, reproducible 2-DE patterns of human lung squamous carcinoma and adjacent normal bronchial epithelial tissues were obtained under the condition of 0.75-mg protein-load. The average deviation of spot position was 0.733+/-0.101 mm in IEF direction, and 0.925+/-0.207 mm in SDS-PAGE direction. For tumor tissue, a total of 1241+/-88 spots were detected, 987+/-65 spots were matched with an average matching rate of 79.5%. For control, a total of 1190+/-72 spots were detected, and 875+/-48 spots were matched with an average matching rate of 73.5%. A total of 864+/-34 spots were matched between tumors and controls. Forty-three differential proteins were characterized: some proteins were related to oncogenes, and others involved in the regulation of cell cycle and signal transduction. It is suggested that the differential proteomic approach is valuable for mass identification of differentially expressed proteins involved in lung carcinogenesis. These data will be used to establish human lung cancer proteome database to further study human lung squamous carcinoma.
Amino Acid Sequence ; Bronchi ; pathology ; Carcinoma, Squamous Cell ; genetics ; pathology ; Databases as Topic ; Electrophoresis, Gel, Two-Dimensional ; methods ; Electrophoresis, Polyacrylamide Gel ; Epithelial Cells ; pathology ; Gene Expression Regulation, Neoplastic ; Humans ; Image Processing, Computer-Assisted ; Isoelectric Focusing ; Lung Neoplasms ; genetics ; pathology ; Molecular Sequence Data ; Proteomics ; methods ; Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization

OBJECTIVE: RNA interference technology (siRNA) was used to inhibit the expression of DJ-1 gene in lung squamous cell carcinoma SK-MES-1 cells, and the cell biological behaviors were investigated to explore the function of DJ-1 gene. METHODS: A targeted DJ-1 siRNA lentiviral vector with a green fluorescent protein (GFP) as a reporter was constructed. The constructed DJ-1 siRNA and control-siRNA vectors were infected into SK-MES-1 cells as experimental (DJ-1 siRNA) and control (Control siRNA) groups, respectively. The DJ-1 protein expression was determined by Western blot. The cell proliferation capability was measured with methyl thiazolyl tetrazolium (MTT). The cell cycle was analyzed by flow cytometry. The capability of cell migration was determined by Transwell method. RESULTS: Compared with control-siRNA and blank-control groups, the protein expression of DJ-1 gene was down-regulated, the capability of cell proliferation was obviously inhibited (P<0.01), the cell cycle was arrested with increased number of G1- and G2-phase cells and reduced number of S-phase cells, and the capability of cell migration was significantly decreased (P<0.01) in the DJ-1 siRNA-infected cells. CONCLUSION DJ-1 gene might play a role in promoting cell proliferation and cell migration capability in vitro in lung cancer SK-MES-1 cells.
Base Sequence ; Carcinoma, Squamous Cell ; genetics ; pathology ; Cell Line, Tumor ; Cell Movement ; genetics ; Cell Proliferation ; Genetic Vectors ; genetics ; Humans ; Intracellular Signaling Peptides and Proteins ; genetics ; metabolism ; Lentivirus ; genetics ; metabolism ; Lung Neoplasms ; genetics ; pathology ; Molecular Sequence Data ; Oncogene Proteins ; genetics ; metabolism ; Protein Deglycase DJ-1 ; RNA Interference ; RNA, Small Interfering ; genetics

Tumor angiogenesis is the important pathophysiological characteristics of human glioma.The treatment of tumor angiogenesis is currently a hot research topic.This article reviewed the domestic and international research on angiogenesis of glioma,included animal models,cellular mechanisms,regulatory factors,signaling pathways,antiangiogenic drugs,and proteomics regarding glioma angiogenesis to clarify the current status of research and clinical treatment,providing reference for further study on angiogenesis of glioma,and discovery of novel biomarkers of tumor angiogenesis and therapeutic targets.