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Cellular senescence a double-edged sword

A new study reveals that cellular senescence, a natural process for fighting cancer in younger persons, can actually promote cancer in older individuals by triggering the secretion of proteins that cause inflammation. This process is linked to almost every major disease associated with aging, including many cancers.

SourceDOE/Lawrence Berkeley National Laboratory·JournalPublication Library and Information Science·DateDec 3, 2008

Lactic acid found to fuel tumors

Researchers found lactic acid is an important energy source for tumor cells and discovered a way to destroy hard-to-kill cells by preventing lactate delivery. Blocking lactate transport kills oxygenated cells that starve hypoxic cells, offering a novel approach to treating tumors.

SourceDuke University Medical Center·JournalJournal of Clinical Investigation·DateNov 20, 2008

JCI table of contents: Nov. 20, 2008

Researchers identified a potential new target for anticancer therapeutics by showing that well-oxygenated tumor cells use lactate as a fuel source, which is released by hypoxic tumor cells. Inhibiting this protein MCT1 disrupts the symbiotic relationship between tumor cell types and leads to decreased tumor growth in mice models.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateNov 20, 2008

Preventing tumor cells from refueling: A new anti-cancer approach?

Researchers have identified a potential new target for anticancer therapeutics by showing that well-oxygenated tumor cells use lactate as a fuel, while hypoxic cells use glucose. Inhibiting this protein MCT1 disrupts the symbiotic relationship between the two cell types, leading to decreased tumor growth in mouse models.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateNov 20, 2008

Also in the Nov. 11 JNCI

A recent study discovered that the Overexpressed in Lung Cancer 1 (OLC1) gene is consistently expressed at high levels in most lung cancers, particularly in smokers. OLC1 overexpression was also shown to induce tumor formation in tissue culture cells and mouse models of lung cancer.

SourceJournal of the National Cancer Institute·JournalJNCI Journal of the National Cancer Institute·DateNov 11, 2008

Substance tackles skin cancer from 2 sides

Researchers develop a novel designer molecule that targets malignant melanoma cells using two different routes: triggering the immune system to attack and switching off a specific gene, driving cancer cells to suicide. Initial experiments in mouse models show significant inhibition of metastasis growth and tumor shrinkage.

SourceUniversity of Bonn·JournalNature Medicine·DateNov 2, 2008

JCI table of contents: Oct. 23, 2008

Researchers identified a molecular reason why MEK inhibitors are limited in their ability to kill B-RAF mutant tumor cells, suggesting a new antitumor approach. MicroRNA15a modulates the expression of Cdc25A and affects hepatic cystogenesis in a rat model of polycystic kidney disease.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateOct 23, 2008

How eating fruit and vegetables can improve cancer patients' response to chemotherapy

A new study published in the Proceedings of the National Academy of Sciences found that apigenin, a naturally occurring compound in fruits and vegetables, improves cancer cells' response to chemotherapy. By localizing tumor suppressor p53 in the cell nucleus, apigenin facilitates cell death and stops tumor growth.

SourceUniversity of California - Riverside·JournalProceedings of the National Academy of Sciences·DateOct 22, 2008

Pitt research indicates new virus is culprit, not bystander, in deadly skin cancer

Researchers at the University of Pittsburgh have found that a virus, Merkel cell polyomavirus (MCV), is the cause of Merkel cell carcinoma, an aggressive form of skin cancer. The virus infects normal cells before they turn into cancer cells, and its replication can lead to the death of cancer cells.

SourceUniversity of Pittsburgh Schools of the Health Sciences·JournalProceedings of the National Academy of Sciences·DateSep 22, 2008

JCI online early table of contents: Aug. 14, 2008

Researchers at Ecole Polytechnique Fédérale de Lausanne and University of Pennsylvania School of Medicine have identified a protein called Hsp104 that dramatically reduces alpha-synuclein aggregation and dopaminergic degeneration in a rat model of Parkinson's disease. The study suggests that Hsp104 could be considered as a potential st...

SourceJCI Journals·JournalJournal of Clinical Investigation·DateAug 14, 2008

Nanoparticles + light = dead tumor cells

Researchers have developed a novel method to kill tumor cells using nanoparticles and light. The technique employs quantum dots that emit light when exposed to megavoltage x-rays, which triggers the cancer-killing activity of Photofrin. This approach could be more effective in treating deeply seated tumors than current methods.

Brown chemists create cancer-detecting nanoparticles

Researchers have created the smallest magnetic nanoparticles to date that can be used to locate cancer cells during MRI scans. The particles are about 8.4 nanometers in size and emit a stronger signal for detection, making them ideal for detecting tumors without surgery.

SourceBrown University·JournalJournal of the American Chemical Society·DateMay 27, 2008