A group of proteins, the histone deacetylases (HDACs), have been on the watch list of scientists worldwide for more than two decades. This attention is owed to their important function in epigenetics: histone deacetylases coordinate the transcription of genetic information and play an important role in the development of diseases such as cancer and neurodegenerative disorders. …
The researchers investigated cancer stem cell numbers in oral cancers associated with human papillomavirus (HPV) and in oral cancers not associated with the virus. Typically, patients with HPV-positive oral cancer respond better to therapy and have a more promising prognosis than patients with HPV-negative tumors. The latter are usually associated with tobacco and alcohol use…
The landscape of genetic testing has broadened to include a range of diseases, and demand for testing and counseling has greatly increased because of direct-to-consumer marketing, says the study’s lead investigator, Marc Schwartz, PhD, co-leader of Georgetown Lombardi’s Cancer Prevention and Control Program. "It’s important that all people interested in testing have access to thorough information so they can consider the implications of test results and interpret them in the context of family history," says Schwartz, who is also co-leader of the Fisher Center for Familial Cancer Research at Georgetown. "Counseling on the phone reduces costs and expands genetic counseling and testing access to rural areas, where counseling isn’t always available." While this study was conducted with women considering testing for mutations in the breast or ovarian cancer genes BRCA1 and/or BRCA2, the findings "may extend to genetic counseling for other hereditary cancers and complex conditions in adults such as heart disease," says co-author Beth N. …
As with breast cancer, HER2 amplification in MPUC results in a faster growing form of cancer that spreads quickly and has a higher chance of recurrence. The hope is that combating this amplification with trastuzumab, a drug that is effective in HER2 positive breast cancers, will result in effective therapy against bladder cancer. "These findings show it is critical for pathologists to recognize this type of bladder cancer and that providers should be aware of and order the appropriate tests," says John Cheville, M.D., a Mayo Clinic pathologist and lead author of the study. …
The incidence figures for secondary breast cancer are based on long-term observation of 590 female patients in the German-Austrian pediatric treatment trials dating back to the years 1978 to 1995. The authors estimate that 19% of the girls treated with radiotherapy for Hodgkin’s disease develop secondary breast cancer within 30 years as a result of that therapy. …
Unless it can enter a blood or lymphatic vessel, a cancer cell is imprisoned in the tissue where it arises. The growth factor VEGF is the tumor cell’s master key…
"A dramatic increase in sugar uptake could be a cause of oncogenesis," Bissell says. "Furthermore, through a series of painstaking analysis, we have discovered two new pathways through which increased uptake of glucose could itself activate other oncogenic pathways. This discovery provides possible new targets for diagnosis and therapeutics." Working with Bissell, Yasuhito Onodera, a Japanese postdoctoral fellow in her research group who is now an assistant professor in Japan, examined the expression of glucose transporter proteins in human breast cells. The focus was on the glucose transporter known as GLUT3, the concentrations of which Onodera and Bissell showed are 400 times greater in malignant than in non-malignant breast cells…
Angiogenesis creates new blood vessels in a process that can lead to the onset and progression of several diseases such as cancer and age-related macular degeneration. Vascular endothelial growth factor (VEGF) is a signaling protein produced by damaged cells, which binds to one of its receptors VEGFR-2, located on the surface of blood vessel cells. …
The researchers compared genetic data from fossils of Neanderthals and another group of ancient human ancestors called Denisovans to data from modern-day cancer patients. They found evidence of Neanderthal and Denisovan viruses in the modern human DNA, suggesting that the viruses originated in our common ancestors more than half a million years ago. This latest finding, reported in Current Biology, will enable scientists to further investigate possible links between ancient viruses and modern diseases including HIV and cancer, and was supported by the Wellcome Trust and Medical Research Council (MRC). Around 8% of human DNA is made up of ‘endogenous retroviruses’ (ERVs), DNA sequences from viruses which pass from generation to generation…
"Just like their matriarch, the Lacks family continues to have a significant impact on medical progress by providing access to an important scientific tool that researchers will use to study the cause and effect of many diseases with the goal of developing treatments," said NIH Director Francis S. Collins, M.D., Ph.D. In the Nature Comment, Dr. …