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A new approach to cancer treatment called immunotherapy could spare patients at least some of the grueling battery of chemotherapy treatments by retraining the body's own defenders--the cells of the immune system--to recognize and destroy tumors. Now researchers at Harvard University have developed a simple way to do this inside the body: a polymer implant attracts and trains immune-system cells to go after cancer. The experimental approach has shown great success in animal studies, increasing the survival rate of mice with a deadly melanoma from 0 to 90 percent. The implant could also be used to treat diseases of the immune system such as arthritis and diabetes, and, potentially, to train other kinds of cells, including stem cells used to repair damage to the body.

DCA is an organic compound, and a byproduct of TCE (trichloroethylene), a chemical that has been a concern in the development of cancer. In January 2007, researchers at the University of Alberta published a study in the journal Cancer Cell suggesting that DCA showed promise in shrinking tumors in lab rats as well as inhibiting growth of cultured human cancer cells. They hypothesized that DCA may be able to change cancer cells back to normal ones by switching them from the aberrant energy pathways they rely on to those used by normal cells.

Berberine inhibits human tongue squamous carcinoma cancer tumor growth in a murine xenograft model. Ho YT, Yang JS, Lu CC, Chiang JH, Li TC, Lin JJ, Lai KC, Liao CL, Lin JG, Chung JG. Phytomedicine. 2009 Sep;16(9):887-90. Epub 2009 Mar 20. PMID: 19303753 Our primary studies showed that berberine induced apoptosis in human tongue cancer SCC-4 cells in vitro. But there is no report to show berberine inhibited SCC-4 cancer cells in vivo on a murine xenograft animal model. SCC-4 tumor cells were implanted into mice and groups of mice were treated with vehicle, berberine (10mg/kg of body weight) and doxorubicin (4mg/kg of body weight). The tested agents were injected once per four days intraperitoneally (i.p.), with treatment starting 4 weeks prior to cells inoculation. Treatment with 4mg/kg of doxorubicin or with 10mg/kg of berberine resulted in a reduction in tumor incidence. Tumor size in xenograft mice treated with 10mg/kg berberine was significantly smaller than that in the control group. Our findings indicated that berbeirne inhibits tumor growth in a xenograft animal model. Therefore, berberine may represent a tongue cancer preventive agent and can be used in clinic.

H. Weiler A platelet cloak for tumor cells Blood, January 1, 2005; 105(1): 5 - 6. Palumbo and colleagues show that platelets and fibrinogen protect metastatic tumor cells from elimination by NK cells, confirming a striking mechanistic link between activation of the blood coagulation system and the spread of tumor metastases

It was concluded that omega-3 fatty acid could inhibit the proliferation of pancreatic cancer cell line SW1990 cells and promote their apoptosis. The down-regulation of the cyclin E expression by omega-3 fatty acid might be one of the mechanisms for its anti-tumor effect on pancreatic cancer. Modulatory effects of EPA and DHA on proliferation and apoptosis of pancreatic cancer cells. Zhang W, Long Y, Zhang J, Wang C. J Huazhong Univ Sci Technolog Med Sci. 2007 Oct;27(5):547-50. PMID: 18060632

A recently published study in Nutrition and Cancer (60(5), 643-651) by researchers at Kansai Medical University in Osaka, Japan has shown that AHCC (Active Hexose Correlated Compound) enhances immune function by increasing the number of dendritic cells (DCs). DCs are a key part of the immune system responsible for presenting foreign substances to other immune system cells. The study was conducted in a double-blind randomized fashion where twenty-one healthy subjects received a placebo or AHCC at 3.0 g/day for 4 weeks. Blood samples were obtained and measured at baseline and at 4 weeks. The number of circulating types of DCs was measured which included CD 11c+ DCs (myeloid DC population; DC1) and CD11c- DCs (lymphoid DC population; DC2). Other parameters measured included mixed-leukocyte reaction (MLR), natural killer (NK) cell activity, the proliferative response of T lymphocytes toward mitogen (phytohemagglutinin [PHA]) and cytokine production of interleukin (IL)-2, IL-4, IL-6, IL-10, interferon gamma-gamma, and (alpha)-tumor necrosis factor.

Cell line is a permanently established cell culture that can proliferate indefinitely given appropriate fresh medium and space. Cell line differs from cell strain in that they have escaped the Hayflick limit and become immortalised. Some species, rodents in particular, give rise to cell lines relatively easily, whereas other species do not.

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A signalling pathway that influences how sensitive cancer cells are to the beneficial effects of dietary restriction is described in this week's Nature. Dietary restriction - eating less calories while maintaining essential vitamins and minerals - can extend lifespan, and reduce cancer incidence and growth. But some types of cancer cell are more sensitive to the anti-growth effects of dietary restriction than others, Nada Kalaany and David Sabatini report. The effect hinges on the activity of the phosphatidylinositol-3-kinase (PI3K) pathway. If the pathway is active, dietary restriction has no effect on cancer cells. However, if the pathway is inactive, tumours are sensitive to dietary restriction.

Schroeder CP, Yang P, Newman RA, Lotan R. Eicosanoid metabolism in squamous cell carcinoma cell lines derived from primary and metastatic head and neck cancer and its modulation by celecoxib. Cancer Biol Ther. 2004 Sep;3(9):847-52. Epub 2004 Sep 18. P