Oral Cancer News – Page 258 – The Oral Cancer Foundation News Archive

F.D.A. to increase medical radiation oversight

Source: nytimes.com Authors: Walt Bogdanich & Rebecca R. Ruiz The federal Food and Drug Administration said Tuesday that it would take steps to more stringently regulate three of the most potent forms of medical radiation, including increasingly popular CT scans, some of which deliver the radiation equivalent of 400 chest X-rays. With the announcement, the F.D.A. puts its regulatory muscle behind a growing movement to make life-saving medical radiation — both diagnostic and therapeutic — safer. Last week, the leading radiation oncology association called for enhanced safety measures. And a Congressional committee was set to hear testimony Wednesday on the weak oversight of medical radiation, but the hearing was canceled because of bad weather. The F.D.A. has for weeks been investigating why more than 300 patients in four hospitals were overradiated by powerful CT scans used to detect strokes. The overdoses were first discovered last year at Cedars-Sinai Medical Center in Los Angeles, where patients received up to eight times as much radiation as intended. The errors occurred over 18 months and were detected only after patients lost their hair. In making the announcement, the F.D.A. said it hoped to reduce unnecessary radiation exposure from three medical imaging procedures: CT scans, which provide three-dimensional images; nuclear medicine studies, in which patients are given a radioactive substance and doctors watch it move through the body; and fluoroscopies, in which a radiation-emitting device provides a continuous internal image on a monitor. “These types of imaging exams expose patients to ionizing radiation, a [...]

Oral Cancer Foundation News Team - A2010-02-09T21:34:45-07:00February, 2010|Oral Cancer News|

New DNA therapy for advanced mouth cancer

Source: www.dentistry.co.uk Author: staff A research team has been awarded a patent after developing a new DNA therapy for head and neck cancer sufferers. Researchers from the University of Pittsburgh School of Medicine in the US, aims to develop a safe and effective alternative to standard chemotherapy treatments which cause debilitating side-effects. Based on a form of genetic therapy called ‘antisense', the new DNA therapy injections target the epidermal growth factor receptor (EGFR), blocking the growth of a protein which is found on the surface of many types of cancer cells. During the initial Cancer Institute study, led by Dr Jennifer Grandis, the injections were well-tolerated, and the tumours which were being targeted by the treatment disappeared or shrank considerably in more than a quarter of the patients. The British Dental Health Foundation has welcomed the latest development in treating this deadly disease. Chief executive Dr Nigel Carter said: 'These new findings show that this new DNA therapy can have the potential as both a safe and effective advanced cancer treatment. One of the major problems with mouth cancer is that it often presents in late stages, significantly reducing survival – so a late stage treatment is particularly welcome. 'Head and neck cancers have a strong association with environmental and lifestyle risk factors including smoking tobacco, alcohol consumption and the sexually transmitted human papilloma virus (HPV). 'Research has recently suggested that the HPV virus, transmitted via oral sex, could soon become the most common cause of mouth cancer.' Cancers caused [...]

Oral Cancer Foundation News Team - A2010-02-07T09:42:31-07:00February, 2010|Oral Cancer News|

Laser and nanoparticles blow up cancer cells

Source: news.softpedia.com/ Author: Tudor Vieru In a new approach to fighting cancer cells, or cells ridden by several other types of diseases as well, researchers managed to combine the powers of lasers and nanoparticles most efficiently. The method relies on using short bursts of laser light to produce small explosions from gold particles that have been placed inside the targeted cells beforehand. The blasts, which cause no ill-effects to surrounding cells, are highly capable of dismembering the cancerous ones, acting like a “jackhammer” on their targets, and pounding relentlessly, LiveScience reports. Basically, the active elements in this therapy are nanobubbles, which form as the gold particles are subjected to intense, but short, laser pulses. The science group, which is based at the Rice University, was able to determine that the intensity of the lasers could be tuned in two ways, resulting in two different results. The end result could be either clear, bright and small bubbles, that were harmless, or larger explosions that took place inside the cell, which dismembered it. “Single-cell targeting is one of the most touted advantages of nanomedicine, and our approach delivers on that promise with a localized effect inside an individual cell. The idea is to spot and treat unhealthy cells early, before a disease progresses to the point of making people extremely ill,” says RU physicist Dmitri Lapotko. He was also the author of a new study detailing the method, which appears online, in the January 25 issue of the respected scientific journal Nanotechnology. [...]

Oral Cancer Foundation News Team - A2010-02-07T09:35:35-07:00February, 2010|Oral Cancer News|

Harmless virus could be an answer to cancer

Source: www.dailyfinance.com Author: Melly Alazraki You'd think that infecting a cancer patient with a virus would be the last thing a doctor would want to do. But what if it was a virus that attacks and kills cancer cells? That's exactly the premise that led to the founding of Oncolytics Biotech, a Calgary-based biotechnology company. It's about to begin Phase 3 trials that could pave the way for a marketable cancer treatment based on this technology in two years, says CEO Dr. Brad Thompson (pictured) in an interview with DailyFinance. "We're working on a product that is widely applicable to quite a few indications of cancer and is based on a naturally occurring virus that's commonly found in the environment and that happens to have a preference of growing in cancer cells as opposed to growing in normal tissue." It's called a reovirus (short for Respiratory Enteric Orphan virus), and it's a type which most people pick up by age 12 through inhalation or contact that causes few or no health problems. But when the virus enters cancer cells, it kills them. On-Off Switch Viruses, naturally, prefer cells that can't fight them off. And these cancer cells all have a common characteristic: They have a certain growth pathway, called the Ras pathway, turned on. "If a cell doesn't have that pathway turned on, nothing happens, so it's like an on-off switch for the virus's growth," Thompson explained. In the human body, very few normal cells have that Ras pathway turned [...]

Oral Cancer Foundation News Team - A2010-02-06T12:11:49-07:00February, 2010|Oral Cancer News|

Survey: use of internet to find health information increases

Source: www.medscape.com Author: staff More than half of Americans looked up health information on the Internet last year, U.S. government researchers reported on Tuesday. But only 5% used email to communicate with their doctors, the survey by the National Center for Health Statistics found. The survey included 7,192 adults aged 18 to 64 questioned between January and June 2009. During that period, 51% "had used the Internet to look up health information during the past 12 months," the center, part of the U.S. Centers for Disease Control and Prevention, said in a statement. "Among adults aged 18-64, women were more likely than men to look up health information on the Internet (58% versus 43%) and were also more likely to use online chat groups to learn about health topics (4% versus 2.5%)." The survey found 6% of adults requested a refill of a prescription on the Internet, and almost 3% had made an appointment with a healthcare provider in the previous 12 months using the Internet. Other researchers have found doctors are reluctant to use the Internet or email to communicate with patients because of concerns about privacy as well as confusion about how to charge for their time.

Oral Cancer Foundation News Team - A2010-02-06T08:54:51-07:00February, 2010|Oral Cancer News|

Medical group urges new rules on radiation

Source: nytimes.com Author: Walt Bogdanich The leading professional organization dedicated to radiation oncology has called for enhanced safety measures in administering medical radiation, including the establishment of the nation’s first central database for the reporting of errors involving linear accelerators — machines that generate radiation — and CT scanners. The group, the American Society for Radiation Oncology, or Astro, issued a six-point plan on Wednesday that it said would improve safety and quality and reduce the chances of medical errors. Even though the group says serious radiation accidents are rare, it says it will work toward a stronger accreditation program, expanded training, and an enhanced program to ensure that medical technologies from different manufacturers can safely transfer information. Astro will also press for federal legislation to require national standards for radiation therapy treatment teams, along with additional resources for the Radiological Physics Center, a federally financed group that evaluates the safety of treatments. Dr. Anthony L. Zietman, professor of radiation oncology at Harvard Medical School and Astro’s president, said the goal was to “take measures that are currently in existence, recognize them and then work to strengthen them and above all work to reassure patients.” The group said it began a comprehensive review of existing policies last week after two articles in The New York Times reported on the harm that can result when powerful and technologically complex machines go awry and when basic safety procedures are not followed. The articles reported that medical personnel who work with the new [...]

Oral Cancer Foundation News Team - A2010-02-05T22:29:56-07:00February, 2010|Oral Cancer News|

HPV-associated base of tongue squamous cell carcinoma incidence increasing in Sweden

Source: www.hemonctoday.com Author: staff The incidence for base of tongue squamous cell carcinoma increased significantly in Sweden between 1998 and 2007, and by 2007, more than 80% of these cases were HPV-positive. Various studies during the past 20 years have indicated that HPV is a risk factor for oropharyngeal cancer. However, few studies have assessed the specific sub-sites of the oropharynx. In this study, researchers assessed the increased incidence of base of tongue cancer and the association of HPV in 109 patients diagnosed with base of tongue cancer between 1998 and 2007 in Stockholm, Sweden. The researchers obtained diagnostic pretreatment paraffin-embedded tumor biopsies from 95 patients. DNA samples were obtained from 30-mcm paraffin-embedded base of tongue biopsy slices. Age at diagnosis ranged from 41 to 85 years. From 1970 to 2007, the age-standardized incidence of base of tongue squamous cell carcinoma increased from 0.15 per 100,000 person-years between 1970 and 1974 to 0.47 per 100,000 person-years between 2005 and 2007. HPV DNA was found in 75% of base of tongue cancer cases during this time. Of the HPV-positive tumors, 86% were HPV-16–positive and seven were HPV-33–positive. During the study period, the incidence of HPV-positive base of tongue cancers persistently increased (see chart). A significant increase was found in the proportion of HPV-positive cancer between 1998 and 2001 compared with 2004 and 2007 (58% vs. 84%; P<.05). When compared with patients with HPV-negative tumors, patients with HPV-positive tumors were likely to be stage IV (P<.02) and had less advanced T-stage (P<.05 [...]

Oral Cancer Foundation News Team - A2010-02-05T22:20:41-07:00February, 2010|Oral Cancer News|

Pitt researchers receive patent for new head and neck cancer treatment

Source: www.healthcanal.com Author: staff Researchers from the University of Pittsburgh School of Medicine have been awarded a patent from the U.S. Patent and Trademark Office for the development of a new DNA therapy for head and neck cancers. The therapy targets the epidermal growth factor receptor (EGFR), a protein found on the surface of many types of cancer cells that causes them to multiply. Standard treatments for head and neck cancers often are ineffective and tend to have debilitating side effects, explained Jennifer R. Grandis, M.D., professor of otolaryngology and pharmacology at Pitt and director of the Head and Neck Program at the University of Pittsburgh Cancer Institute (UPCI). “We set out to develop an alternative approach that is safe and effective for these cancers,” she said. The new treatment is based on a form of genetic therapy called “antisense,” or AS, in which a synthesized strand of DNA or RNA targets the EGFR genes within a head and neck tumor. The therapy blocks the production of a protein produced by the gene. According to Dr. Grandis, expectations were exceeded in a phase I study of the therapy that was designed primarily to determine the safety and potential toxicity of EGFR AS injections in patients with advanced head and neck cancers. “Not only were the AS injections well-tolerated, but tumors disappeared or shrank considerably in 29 percent of the patients,” said Dr. Grandis. “These results show that EGFR AS therapy has great potential as a safe, effective treatment.” A phase [...]

Oral Cancer Foundation News Team - A2010-01-31T06:34:56-07:00January, 2010|Oral Cancer News|

Photodynamic therapy linked to oral cancer benefit

Source: www.modernmedicine.com Author: staff Photodynamic therapy (PDT) appears useful in treating early-stage cancer of the mouth or oropharynx, either as a primary treatment or as an addition to unsuccessful surgery or radiation, according to research published in the January issue of Lasers in Surgery and Medicine. Vanessa Gayl Schweitzer, M.D., and Melissa L. Somers, M.D., of the Henry Ford Health System in Detroit, discuss the outcomes of 30 patients with squamous cell carcinoma, stage Tis-T2N0M0, in the mouth or oropharynx. Most had undergone prior surgery or radiation, in combination or alone. All received intravenous porfimer sodium followed by photoactivation. Over an average follow-up of two years, the researchers found that 80 percent had complete remission. Twenty percent of patients were partial responders and had recurrences at points ranging from three to 26 months. Five patients -- four of whom were among the complete responders -- developed new primary head and neck tumors. "PDT is a promising additional local surgical oncologic modality for primary treatment of selective superficial carcinomas of the oral cavity and oropharynx with low risk for nodal metastases," the authors conclude. "The development of new and more tumor-specific photosensitizing agents with longer wave-length activation and deeper tissue penetration with shorter skin photosensitivity post-drug administration will expand the application of PDT for the treatment of superficial head and neck cancers."

Oral Cancer Foundation News Team - A2010-01-29T19:54:30-07:00January, 2010|Oral Cancer News|

Drinkers underestimate harm from alcohol

Source: www.onmedica.com Author: OnMedica staff More than half (55%) of people in England who drink alcohol wrongly believe that alcohol only damages your health if you regularly get drunk or binge drink, a poll by YouGov has shown. YouGov questioned more than 2,000 adults and found that 83% of those who regularly drink more than the NHS recommended limits – 2-3 units a day for women and 3-4 units a day for men – don’t realise that their drinking is risking their long-term health. An estimated 10 million adults in England are drinking above the recommended limits, so about 8.3 million people are potentially unaware of the damage their drinking could be causing. Although 86% of drinkers surveyed said they knew that drinking alcohol is related to liver disease, far fewer realised it is also linked with breast cancer (7%), throat cancer (25%), mouth cancer (28%), stroke (37%) and heart disease (56%), along with other serious conditions. The government has funded a £6 million campaign, backed by charities Cancer Research UK, the British Heart Foundation and the Stroke Association, to warn drinkers of the unseen health damage caused by regularly drinking more than the NHS advises. Billboard, press and TV adverts will show drinkers the damage that is being done to their organs while they are drinking, whether in a pub or at home. More than 9,000 people in the UK die from alcohol-related causes each year. The World Health Organisation estimates that 20% of alcohol-related deaths are from cancer, [...]

Oral Cancer Foundation News Team - A2010-01-29T19:50:49-07:00January, 2010|Oral Cancer News|