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U-M scientists observe deadly dance between nerves and cancer cells

Source: ns.umich.edu Author: Laura Bailey In certain types of cancer, nerves and cancer cells enter an often lethal and intricate waltz where cancer cells and nerves move toward one another and eventually engage in such a way that the cancer cells enter the nerves. The fluorescence image shows the interaction between the nerve (red) and cancer (green). Image credit: Nisha D’Silva The findings, appearing in Nature Communications, challenge conventional wisdom about perineural invasion, which holds that cancer cells are marauders that invade nerves through the path of least resistance, said Nisha D'Silva, principal investigator and professor at the University of Michigan School of Dentistry. D'Silva's lab discovered that perineural invasion is actually a much more intricately choreographed biochemical give-and-take between the nerves and the cancer cells. "Once head and neck cancer invades the nerves, it is one of the worst things that can happen," said D'Silva, who also has a joint appointment at the U-M Medical School Department of Pathology and is a member of the U-M Cancer Center's Head and Neck Oncology program. "It is highly correlated with poor patient survival, and there is no targeted treatment for it because it is not known why some tumors do this and some don't." Perineural invasion is seen most in head and neck, pancreatic, stomach and colon cancers, and causes severe pain or numbness, tumor spread and recurrence, and loss of function, among other complications. D'Silva's lab found that perineural invasion begins when the nerve releases a stimulus that triggers a [...]

LED Dental Joins With the Oral Cancer Foundation to promote oral cancer early detection initiative

Source: www.marketwatch.com Author: press release LED Dental Inc. has announced that the company will be serving as a strategic partner in the Oral Cancer Foundation's "Be Part of the Change"(TM) program, seeking to promote the importance of routine comprehensive oral screenings and early detection in the fight against oral cancer. The Oral Cancer Foundation initiated the "Be Part of the Change"(TM) campaign to help promote a shift in paradigm with regard to the screening for oral cancer, creating a movement toward earlier detection of oral disease. While regular oral screenings are a key tool in the early detection of oral cancer and pre-cancerous lesions, many patients are not receiving routine oral examinations that could potentially locate a serious oral health concern. The Oral Cancer Foundation is working to change the mindset of the oral healthcare industry, making improved oral screening protocols a priority in every dental practice. "The best defense any patient has against oral disease and oral cancer is early detection, which is where dental practitioners can effect change," said Brian Hill, founder and executive director of the Oral Cancer Foundation. "When oral cancer is located in earlier stages, there is higher probability for reduced treatment related morbidity and improved patient outcomes. Our goal is to get healthcare professionals to commit to performing routine comprehensive oral examinations on every patient, especially during hygiene visits and recall appointments." As the manufacturer of the market-leading VELscope® Vx Enhanced Oral Assessment, LED Dental has joined the Oral Cancer Foundation's cause, providing a free [...]

Broccoli may prevent oral cancer as clinical tests set to start on humans

Source: www.mirror.co.uk Author: staff The much-maligned green vegetable deserves more respect as lab tests show extracts of sulforaphane reduced tumours in mice. Broccoli could soon protect people from cancer of the mouth, throat, neck and head in a new treatment known as “green chemoprevention.” Cruciferous vegetables such as broccoli, cabbage and garden cress have a high concentration of sulforaphane. Previous studies, including large-scale trials in China, have shown sulforaphane helps mitigate the effects of environmental carcinogens. Now lab tests have shown extracts made from broccoli sprout protected mice against oral cancer. American scientists now plan to carry out clinical trial on patients at high risk of a recurrence of head and neck cancer. They will be given capsules containing broccoli seed powder to determine if they can tolerate the regimen and whether it has enough of an impact on their oral lining to prevent cancer. Associate professor Dr Julie Bauman of the University of Pittsburgh said: “People who are cured of head and neck cancer are still at very high risk for a second cancer in their mouth or throat, and, unfortunately, these second cancers are commonly fatal. “So we’re developing a safe, natural molecule found in cruciferous vegetables to protect the oral lining where these cancers form.” The study involved testing sulforaphane in the laboratory when over several months mice predisposed to oral cancer were given the extract and found that it significantly reduced the incidence and number of tumours. Professor of medicine Dr Daniel Johnson at Pitt’s School [...]

Breath test for detecting head and neck cancer

Source: http://medicalxpress.com/ Author: provided by Ecole Polytechnique Federale de Lausanne A portable device can detect the presence of certain types of cancer in people's breath. Tested on patients, the new device was developed in part by EPFL researchers as part of an international collaboration. Inhale, then exhale. This simple act could now save lives. A technology developed in part at EPFL can quickly identify the presence of a head and neck cancer, such as of the throat or mouth by analysing people's breath. The new device, equipped with extremely sensitive sensors, has been tested on patients and operates with a computer or even a mobile phone. It's an innovative tool for the early diagnosis of tumours. Very few routine exams exist to detect cancer. Yet this disease is the third leading cause of death worldwide. Most tumours are found relatively late, which makes recovery less likely. Cancer "signals" its presence in human breath At SAMLAB in Neuchâtel, under the direction of Nico de Rooij, a team of researchers including Frédéric Loizeau, a doctoral student at the time, developed very precise micro-sensors able to distinguish the breath of a healthy patient from that of a sick one. The scientists' starting point was the observation that human breath contains not only air, but also hundreds of volatile organic compounds (VOCs) whose presence and concentration vary depending on the patients' state of health. The metabolism of cancerous cells is different from that of healthy cells, and the two types of cells produce different [...]

Nova Scotia to include boys in HPV vaccination schedule

Source: www.theglobeandmail.com Author: Kelly Grant, Health Reporter Boys in Nova Scotia will begin receiving free vaccinations against the human papillomavirus next fall, a move that makes the Maritime province only the third in Canada to extend public funding of the cancer-thwarting shot to all children, regardless of gender. In the budget unveiled on Thursday, Nova Scotia’s Liberal government announced it would make the HPV vaccine available to Grade 7 boys as part of the regular school-based immunization program. The expansion is expected to cost $492,000 a year. Every province in Canada already covers the HPV vaccine for girls in an effort to prevent genital warts and cervical cancer, both of which can be caused by some strains of the virus, which is transmitted through sex and skin-to-skin contact. But in recent years, oncologists and major health organizations – including the Canadian Cancer Society and the National Advisory Committee on Immunization – have begun calling for HPV vaccinations for boys, too. Until this week, only Prince Edward Island and Alberta had heeded that call with a publicly funded program. HPV can lead to cancers of the penis, anus, oral cavity and throat in men, as well as genital and anal warts. “We have a vaccine. It can prevent cancers in men and women, so we want Canadians to be vaccinated against it, because we can actually prevent cancers from starting in the first place,” said Robert Nuttall, the assistant director of cancer control policy at the Canadian Cancer Society. Nova Scotia’s [...]

FDA Advisory Committee hesitates to endorse message of safe smokeless tobacco

Source: www.medpagetoday.com Author: Shannon Firth An FDA advisory panel were reluctant to recommend a gentler warning label for one brand of smokeless tobacco products at a committee hearing on Friday. Swedish Match North America (SMNA), the first company to be considered for a modified risk tobacco designation by the FDA, is asking to replace a current label warning, "This product is not a safe alternative to cigarettes," with this: "Warning: No tobacco product is safe, but this product presents substantially lower risks to health than cigarettes." It also wants to drop warnings required for other smokeless tobacco products about oral cancers, tooth loss, and gum disease. In a key vote, the eight-member FDA's Tobacco Products Scientific Advisory Committee split 4-4 on whether the claim that snus offer a "substantially lower risk" claim relative to cigarettes is justified. Many members said the health risks were lower for certain tobacco-related illnesses, but not for all health concerns. Those who disputed the claim argued that it could not be taken as a "global statement" -- as there are known risks to pregnant women and uncertain risks for adolescents. As for the proposed label change, the whole committee agreed that the sponsor's statements would not suffice. Gary Giovino, PhD, chair of the department of Community Health and Health Behavior at the State University of New York at Buffalo, felt the statement was "dismissive of the health risks." The word "but" in any sentence seems to negate the first half, he said. Snus is a [...]

Curt Schilling: Letter to my younger self

Source: www.theplayerstribune.com Author: Curt Schilling Dear 16-year-old Curt, Tomorrow at lunch, a kid is going to dare you to take a dip of Copenhagen. If you say yes, like I did, you’ll be addicted for the rest of your life. Well, the rest of your life up to the point when you are diagnosed with cancer. I get what you’re thinking. You’re 16 — you’re invincible, just like all your buddies. If you were to jump ahead 33 years, you couldn’t write a better dream than the one your life is going to be. With one exception. If you say yes tomorrow, you will become addicted to chewing tobacco and you will get mouth cancer. I’m going to tell you a little story that I think may help guide you. (I saw this on a TV series called The West Wing — great show, you’re going to love it one day — and it very much rings true). There was a man — we’ll call him Joe. Joe lived in the same house his entire life. One day, a huge storm came. He turned on the radio: Prepare for torrential rains and deadly flash flooding. Everyone should evacuate to safety immediately. See, Joe was a devout Christian. He had the Lord in his life for as long as he could remember. Church every Sunday, prayed twice a day. “My faith in God is resolute. He will save me,” Joe thought. The rain kept coming down. About two hours later, water [...]

Green tea polyphenol helps kill oral cancer cells by destroying mitochondria

Source: www.medicaldaily.com Author: Chris Weller First it targeted pancreatic cancer. Now it’s moved onto oral cancer. A new study from Penn State University shows the main antioxidant in green tea, epigallocatechin-3-gallate (EGCG), helps kill cancer cells through the destruction of the cells’ mitochondria.   While highly effective at eradicating cancer cells, chemotherapy is quickly falling out of practice with doctors who seek targeted treatments. Instead of getting rid of just the harmful cells, chemo attacks healthy cells, which are often found in the hair and the intestines, resulting in the characteristic hair loss and frequent immune system-related illness. “You don’t see these sorts of side effects with green tea consumption,” said Joshua Lambert, associate professor of food science at Penn State, in a press release. Lambert and his colleagues carried out their study by looking at cell cultures, which they injected with the same amount of EGCG a person would normally have in her saliva after chewing green tea-flavored gum. They saw a number of promising reactions. “It looks like EGCG causes the formation of reactive oxygen species in cancer cells, which damages the mitochondria, and the mitochondria responds by making more reactive oxygen species,” Lambert explained. Over time, the mitochondria lose even more of its defenses with a breakdown in the expression of antioxidant genes. In their weakened state the cancer cells eventually succumb to EGCG in full, and they die. This isn’t the first time EGCG revealed its cancer-killing power. In May of last year, scientists from the [...]

Researchers ID potential prognostic marker for recurrence of head and neck squamous cell carcinoma

Source: medicalxpress.com Author: press release A new study provides the first evidence that the mediator complex subunit 15 (MED15) may play a crucial role in the pathophysiology of head and neck squamous cell carcinoma (HNSCC). MED15 overexpression was found to be associated with higher mortality rates in HNSCC patients with cancer recurrence, particularly in oral cavity/oropharyngeal tumors, according to the study published in The American Journal of Pathology. MED15 overexpression was also associated with heavy alcohol consumption, which is an HNSCC risk factor. HNSCC is the sixth most common cancer worldwide and has a high rate of recurrence and early metastatic disease, resulting in approximately 350,000 deaths each year. "Our findings suggest that MED15 may serve as a prognostic marker for HNSCC recurrence and as a therapeutic target in HNSCC patients suffering from recurrences," said lead investigator Sven Perner, MD, PhD, of the Department of Prostate Cancer Research, Institute of Pathology, and the Department of Otorhinolaryngology at the University Hospital of Bonn (Germany). Mediator is a multiprotein complex that regulates many signaling pathways. In humans, it consists of 30 subunits including MED15, which has been implicated in breast and prostate cancer, with particular attention being given to its link to transforming growth factor-β (TGF-β) signaling. "The evidence that multiple aberrant pathways account for the progression of HNSCC calls for a much deeper understanding of the effect of molecules involved in these signaling pathways upon HNSCC progression," noted Dr. Perner. To investigate the role of MED15 in HNSCC, the researchers analyzed tissues from 113 patients [...]

Head and neck cancer on rise in young men

Source: www.healthcanal.com Author: staff “The head and neck cancers we have found in younger men with no known risk factors such as smoking are very frequently associated with the same HPV virus that causes cervical cancer in women." said Kerstin Stenson, MD, a head and neck cancer surgeon at Rush and a professor of otolaryngology at Rush University. The cancer develops from an HPV infection, likely acquired several years earlier from oral sex. "Men are more susceptible to these cancers because they don’t seem to have the same immune response as women and do not shed the virus like women do,” Stenson said. 'Epidemic proportions' According to the Centers for Disease Control and Prevention, cancers of the oropharynx (back of the throat, including the base of the tongue and tonsils) are usually caused by tobacco and alcohol, but recent studies show that about 72 percent of oropharyngeal cancers are caused by HPV. “There has been significant change in the last decade. Overall, head and neck cancers account for approximately 3 to 5 percent of all cancers, but what’s changed in the past decade is the HPV-associated oropharyngeal cancer. It has reached epidemic proportions,” said Stenson. The American Cancer Society estimates that 45,780 Americans will be diagnosed with cancer of the oral cavity and oropharynx in 2015. If this trend continues, the number of cases of HPV-positive oropharyngeal cancer will surpass the number of cervical cancer cases. Early detection is key The current vaccine has been shown to decrease the incidence [...]

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