Granulocyte macrophage colony-stimulating factor (GM-CSF) is a key cytokine for the generation and stimulation of dendritic cells (DCs), and it may also play a pivotal role in promoting the survival of DCs. In this study, the feasibility of creating a cancer vaccine using DCs adenovirally transduced with the carcinoembryonic antigen (CEA) gene and the GM-CSF gene was examined. In addition, the effect of the co-transduction of GM-CSF gene on the lifespan of these genetically modified DCs was determined.
Tumour Biology: The Journal of the International Society for Oncodevelopmental Biology and Medicine
Carcinoembryonic antigen (CEA) was purified from GW-39 human tumor xenografts in hamsters by immunoaffinity chromatography. Binding of the antigen to immobilized monoclonal antibody provided a high degree of purification of CEA in a single step. A recovery of 79% and a 750-fold purification were obtained. The purified CEA has a molecular size of 180 kilodaltons, an isoelectric point of 4.4, and a specific activity of 0.94. About 73% of the radiolabeled GW-39 CEA reacted with goat anti-CEA serum.
Murine IgG subclasses show different affinities when they react with protein A. The temperature of application of the sample to protein A-Sepharose markedly influences the interaction of certain antibodies with this specific adsorbent. Elution of weakly bound mouse IgG could be carried out by mild temperature changes instead of lowering the pH, and this should be advantageous with certain immunoglobulins that are labile under acidic conditions.
Proceedings of the National Academy of Sciences of the United States of America
How cancer cells bind to vascular surfaces and extravasate into target organs is an underappreciated, yet essential step in metastasis. We postulate that the metastatic process involves discrete adhesive interactions between circulating cancer cells and microvascular endothelial cells. Sialyl Lewis X (sLe(X)) on prostate cancer (PCa) cells is thought to promote metastasis by mediating PCa cell binding to microvascular endothelial (E)-selectin. Yet, regulation of sLe(X) and related E-selectin ligand expression in PCa cells is a poorly understood factor in PCa metastasis.
Carcinoembryonic antigen (CEA) titre elevation is sometimes found in benign diseases, such as gastro-intestinal tract inflammatory disease and chronic obstructive pulmonary disease; however, very high CEA titre is rarely encountered in benign pulmonary disease. A 36-yr-old female, who had suffered from body weight loss, was found to have high serum CEA titre (60.8 ng.mL(-1)). Image studies revealed one pulmonary tumour at the left lower lobe, satellite nodules and mediastinal lymphadenopathy. Left lower lobectomy and lymph node dissection were performed for suspicious pulmonary malignancy.
Zhong Xi Yi Jie He Xue Bao = Journal of Chinese Integrative Medicine
BACKGROUND: Tumor markers are widely used in clinical practice and have become important indicators in assessing cancer progress. There is increasing concern that chemotherapy combined with traditional Chinese medicine has effects in decreasing the level of tumor markers.