Navigation Links
Screen finds an antidepressant and other drugs
Date:9/14/2011

NEW YORK, September 14, 2011In a new study NYU School of Medicine researchers report that they have found several chemical compounds, including an antidepressant, that have powerful effects against brain-destroying prion infections in mice, opening the door to potential treatments for human prion diseases.

The researchers, led by Thomas Wisniewski, MD, professor of neurology, pathology and psychiatry, report their findings in today's online edition of PLoS One. Prion diseases are a family of rare progressive neurodegenerative disorders that affect both humans and animals. An unusual infectious agent, a priona misshapen version of a normal cellular proteincauses the fatal disorders. There are no treatments.

The researchers found that trimipramine, an antidepressant, and fluphenazine, an antipsychotic, have activity against prions. Since the drugs are already in clinical use, Dr. Wisniewski believes that doctors can test them in human patients with Creutzfeldt-Jakob disease, the most common human prion disease.

Dr. Wisniewski and his colleagues previously found 68 chemical compounds, known as styryl-based compounds, bound tightly to amyloid-beta protein deposits in the brains of people who died of Alzheimer's disease. Since the disease-causing aggregates of amyloid-beta and prion proteins are widely believed to have similar structures, his team screened these 68 styryl-based compounds for their ability to inhibit prion infection in a standard cell culture. They found two that seemed both effective and non-toxic, and confirmed their effectiveness by showing that on average they markedly delayed the onset of symptoms in prion-injected lab mice. The styryl-based compounds also reduced the signs of disease in the mouse brains.

Dr. Wisniewski's team found similar results the antidepressant trimipramine and the anti-schizophrenia drug fluphenazine. Both are chemically related to the anti-protozoal drug quinacrine, which is known to slow prion infection in cell cultures, although it fails to protect prion-infected mice or humans. Their chemical differences from quinacrine apparently enable the two drugs to bind more tightly to toxic prion aggregates, andlike the styryl-based compoundsprevent these aggregates from assembling new copies of themselves.

"One of the trimipramine-treated mice stayed healthy throughout the 400-day study," Dr. Wisniewski says.

The National Institutes of Health funds Dr. Wisniewski's laboratory's work to develop potential prion-disease vaccines. Prion diseases in animals have been known to jump to the human population. A prion disease known as bovine spongiform encephalopathy (BSE, also known as "mad cow disease") swept through cattle in Britain in the 1980s, infected humans via beef products, and killed more than 200 people worldwide.

Currently a prion disease known as chronic wasting disease (CWD) is spreading through the deer and elk population of North America. Humans are increasingly exposed to CWD, for example by eating venison, and although CWD so far doesn't seem transmissible to humans, it has been shown to infect other primates. Dr. Wisniewski and colleagues are testing an oral vaccine for CWD in deer and elk in Colorado.


'/>"/>

Contact: Christopher Rucas
Christopher.Rucas@nyumc.org
212-404-3525
NYU Langone Medical Center / New York University School of Medicine
Source:Eurekalert

Related medicine news :

1. Screening Lots of Lymph Nodes Little Help for Colon Cancer Patients
2. Screening for HPV persistence and cervical cancer risk
3. Troubled Teens Spotted in Routine School Screenings: Study
4. Steps Outlined to Screen All Newborns for Heart Defects
5. Newest screen for newborns will indicate heart problems
6. Single flexible sigmoidoscopy screening associated with reduced colorectal cancer
7. Annual cervical cancer screening persists, despite recommended guidelines
8. New prostate cancer screening test shows promise for diagnosis
9. Noninvasive fecal occult blood test effective screen for lower GI tract lesions
10. New high-speed 3-D imaging system holds potential for improved cancer screening
11. Drop in Breast Cancer Death Rates May Not Be Linked to Screening Rates
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/6/2016)... ... , ... Shark Finds and Kevin Harrington, along with the Product ... with Belly Bands. , Having a dog is great—except when it wets every couch, ... nothing works, get Belly Bands, the easiest way to stop dogs from wetting ...
(Date:2/5/2016)... ... February 05, 2016 , ... VeloReality ... lighter, sleeker next generation LYNX VR Indoor Trainer with multi-rider capability to an ... and manufacturing not only reduce the weight of the unit, they also enhance ...
(Date:2/5/2016)... ... 2016 , ... The Muscular Dystrophy Association and Sailormen Inc., ... 14th annual “Appetite for a Cure” campaign on Feb. 1 to raise critical ... diseases that severely limit strength and mobility. , Now through March 20, ...
(Date:2/5/2016)... ... February 05, 2016 , ... After years as an ... Burn Unit, plastic and cosmetic surgeon Dr. Wayne Carman transitioned to chief of the ... successfully completed his first three-year term as chief and began a second three-year term ...
(Date:2/5/2016)... ... February 05, 2016 , ... The American public tends ... water may be safer than regular municipal or well water. The recent experience with ... Sharon Kleyne, could go a long way toward increasing public acceptance of recycled waste ...
Breaking Medicine News(10 mins):
(Date:2/4/2016)... Wegener Polyangiitis - Pipeline Review, H2 ... Polyangiitis - Pipeline Review, H2 2015, provides an ... This report provides comprehensive information on the therapeutic ... at various stages, therapeutics assessment by drug target, ... and molecule type, along with latest updates, and ...
(Date:2/4/2016)... -- Summary Breast cancer, a malignant neoplasm, is ... cancer in women worldwide, accounting for 16% of all ... of women diagnosed with breast cancer has increased over ... has declined due to earlier diagnosis and better treatment ... the past four decades, especially with increasing usage of ...
(Date:2/4/2016)... Feb. 4, 2016 Frontier Pharma: Chronic ... First-in-Class Innovation Chronic Obstructive Pulmonary ... chronic inflammation of the airways and lungs. Persistent ... make the disease one of the leading causes ... in the world. COPD is linked to cumulative ...
Breaking Medicine Technology: