saliva test – Oral Cancer News

Developing a non-invasive test, OrisDX aims to offer a ‘game changer’ for detecting oral cancer

Author: Melissa Fassbender Source: www.news.uchicago.edu OrisDX has developed a novel saliva-based molecular test to detect and diagnose oral cancer earlier—improving patient outcomes and saving lives. The Chicago-based startup was formed based on a decade of research in the field of liquid biopsy and cancer genomics at the University of Chicago and Johns Hopkins University by top physicians and scientists, including co-founders Nishant Agrawal, Chetan Bettegowda, Rifat Hasina and Evgeny Izumchenko. Currently, no oral cancer salivary diagnostics are endorsed by the American Dental Association. The standard for detecting head and neck cancer is a biopsy, which often occurs at late stages, and is associated with poorer patient outcomes. Using biomarker-based molecular genomic techniques to diagnose oral cavity cancers earlier, OrisDX’s technology is based on the latest science and has been proven in clinical studies. “This is going to be a game changer in the field for oral cancer,” said Agrawal, OrisDX CEO and section chief for otolaryngology and head and neck surgery at UChicago Medicine. As a surgeon and as a clinician, Agrawal treats patients with oral cancer every day and sees advanced-stage oral cavity cancer all too often, with most of his patients presenting with Stage 3 or 4 cancers. “It didn’t make sense why most of our patients presented to us with these advanced stages,” said Agrawal. His professional network includes other surgeons and head and neck oncologists who have helped confirm the team’s belief that its test will be valuable to providers and patients alike. Improving outcomes OrisDX’s [...]

OCF News Team - B2022-08-04T14:54:34-07:00August, 2022|Oral Cancer News|

DNA shed from head and neck tumors detected in blood and saliva

Source: www.medicalexpress.comAuthor: Wang et al., Science Translational Medicine (2015) Schematic showing the shedding of tumor DNA from head and neck cancers into the saliva or plasma. Tumors from various anatomic locations shed DNA fragments containing tumor-specific mutations and human papillomavirus DNA into the saliva or the circulation. The detectability of tumor DNA in the saliva varied with anatomic location of the tumor, with the highest sensitivity for oral cavity cancers. The detectability in plasma varied much less in regard to the tumor’s anatomic location. Credit: Wang et al., Science Translational Medicine (2015) On the hunt for better cancer screening tests, Johns Hopkins scientists led a proof of principle study that successfully identified tumor DNA shed into the blood and saliva of 93 patients with head and neck cancer. A report on the findings is published in the June 24 issue of Science Translational Medicine. "We have shown that tumor DNA in the blood or saliva can successfully be measured for these cancers," says Nishant Agrawal, M.D., associate professor of otolaryngology—head and neck surgery—and of oncology at the Johns Hopkins University School of Medicine. "In our study, testing saliva seemed to be the best way to detect cancers in the oral cavity, and blood tests appeared to find more cancers in the larynx, hypopharynx and oropharynx. However, combining blood and saliva tests may offer the best chance of finding cancer in any of those regions." Agrawal explains that inborn genetic predispositions for most head and neck cancers are rare, but [...]

Oral Cancer Foundation News Team - A2015-06-25T16:43:35-07:00June, 2015|Oral Cancer News|

Oral cancer sneaks up

Source: well.blogs.nytimes.com Author: Donald G. McNeail Jr. and Anahad O'Connor The actor Michael Douglas has done for throat cancer what Rock Hudson did for AIDS and Angelina Jolie did for prophylactic mastectomy. By asserting last week that his cancer was caused by a virus transmitted during oral sex, Mr. Douglas pushed the disease onto the front pages and made millions of Americans worry about it for the first time. In this case, it was a subset of Americans who normally worry more about being killed by cholesterol than by an S.T.D. The typical victim is a middle-aged, middle-class, married heterosexual white man who has had about six oral sex partners in his lifetime. The virus, human papillomavirus Type 16, also causes cervical cancer. So is there any early oral screening that a man can have — an equivalent to the Pap smear, which has nearly eliminated cervical cancer as a death threat in this country? The answer, according to cancer experts and a recent opinion from the United States Preventive Services Task Force, is no. And for surprising reasons. The Pap test — invented in 1928 by Dr. George N. Papanicolaou — involves scraping a few cells from the cervix and checking them under a microscope for precancerous changes. Precancerous cells have a “halo” around the nucleus, while cancerous ones have larger, more colorful nuclei, said Dr. Paul D. Blumenthal, a professor of gynecology at Stanford University Medical School. In theory, it should be similarly easy to scrape and examine [...]

Oral Cancer Foundation News Team - A2013-06-12T07:35:44-07:00June, 2013|Oral Cancer News|

A step toward a saliva test for cancer

Source: www.sciencedaily.com Author: staff A new saliva test can measure the amount of potential carcinogens stuck to a person's DNA -- interfering with the action of genes involved in health and disease -- and could lead to a commercial test to help determine risks for cancer and other diseases, scientists reported in Denver during the 242nd National Meeting & Exposition of the American Chemical Society (ACS). "The test measures the amount of damaged DNA in a person's body," said Professor Hauh-Jyun Candy Chen, Ph.D., who led the research team. "This is very important because such damaged DNA -- we call this 'DNA adducts' -- is a biomarker that may help doctors diagnose diseases, monitor how effective a treatment is and also recommend things high-risk patients can do to reduce the chances of actually getting a disease," said Chen. The research team is at National Chung Cheng University (NCCU) in Taiwan. "We tried urine and blood and found these adducts. Then we turned our attention to saliva. It's much more convenient to collect a sample of saliva." A DNA adduct forms when a potentially cancer-causing substance is chemically attached to a strand of DNA, which makes up genes. People come into contact with such substances in the environment, certain workplaces and through everyday activities. Cigarette smoke, for instance, contains at least 20 known cancer-causing substances. When such a substance binds to DNA, it changes the DNA so that genes may not work normally. Our body has a built-in repair system that [...]

Oral Cancer Foundation News Team - A2011-09-02T19:27:30-07:00September, 2011|Oral Cancer News|