Navigation Links
DNA vaccine against multiple sclerosis appears safe, potentially beneficial
Date:8/13/2007

A newly developed DNA vaccine appears safe and may produce beneficial changes in the brains and immune systems of individuals with multiple sclerosis, according to an article posted online today that will appear in the October 2007 print issue of Archives of Neurology, one of the JAMA/Archives journals.

In patients with multiple sclerosis (MS), the immune system attacks the myelin sheaths that protect nerve cells in the brain and spinal cord, according to background information in the article. The nerve cells axon, which transmits messages to other neurons, is eventually destroyed. The cause of MS is unknown, but evidence points to the involvement of immune cells and antibodies that recognize and attack specific substances in the myelin, such as myelin basic protein. Certain cytokines, small proteins produced by cells that trigger inflammation, also may play a role.

Amit Bar-Or, M.D., of the Montreal Neurological Institute and colleagues tested a DNA vaccine, BHT-3009, that encodes a full-length human myelin basic protein. Between 2004 and 2006, the researchers administered the vaccine to 30 patients with relapsing-remitting MS [characterized by symptomatic periods and periods of remission] or secondary progressive MS [when symptoms progressively worsen, but there still may be periods of remission]. After one, three, five and nine weeks, participants received intramuscular injections of placebo or BHT-3009 (in doses of .5 milligrams, 1.5 milligrams or 3 milligrams), with or without 80-milligram pills of atorvastatin calcium, a lipid-lowering drug previously shown to be effective in autoimmune conditions. After 13 weeks, participants who initially received placebo received four injections of BHT-3009.

Magnetic resonance imaging (MRI) and other safety evaluations were performed at the beginning of the study, and again after five, nine, 13, 26, 38 and 50 weeks. BHT-3009 was safe and well tolerated, provided favorable trends on brain MRI and produced beneficial antigen-specific immune changes, the authors write. These changes included a reduction in the number of cytokine-producing CD4+ T cells (a type of white blood cell) specifically targeting myelin proteins. This reduction was found in the blood as well as in the cerebrospinal fluid of three patients who voluntarily underwent lumbar puncture after completing the course of BHT-3009. Atorvastatin did not appear to provide additional benefit.

There were no increases in clinical relapses, disability, drug-associated laboratory abnormalities, adverse events or the number and volume of contrast-enhancing [visible on MRI] lesions on brain MRI with BHT-3009 treatment compared with placebo, the authors write. In fact, there was a trend toward a decrease in the number and volume of contrast-enhancing lesions in the brain in patients treated with BHT-3009 compared with placebo.

Based on these results, a phase 2b triala randomized clinical trial in approximately 290 patientsof BHT-3009 is already under way. If successful in MS, antigen-specific DNA vaccines can be developed for prevention or treatment of related diseases, such as type 1 diabetes mellitus, systemic lupus erythematosus, rheumatoid arthritis and myasthenia gravis, the authors conclude.


'/>"/>

Contact: Susan Thomas
415-352-6262
JAMA and Archives Journals
Source:Eurekalert

Related medicine news :

1. Vaccine to quit smoking?
2. First Vaccine Designed for Africa Cleared for Testing in Humans
3. New hope for cancer victims – will vaccine cure the deadly bug
4. Vaccine for Alzheimer’s diseas
5. New vaccine helps allergy and asthma patients
6. Man against HIV – new vaccine ready for human trials
7. New vaccine helps allergy and asthma patients
8. Development of AIDS vaccine -- Chiron Corp in talks with four Indian cos
9. HIV did not arise from polio vaccine
10. Double impact vaccine
11. Health Officials Recommend Flu Vaccine
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/27/2016)... ... 27, 2016 , ... Beleza Medspa has initiated a new program ... is the first time that Coolsculpting is being used for for more than just ... ensure they meet the prescribed body-fat standard, measured by the circumference-based tape method. ...
(Date:5/26/2016)... ... May 26, 2016 , ... Despite last week’s media reports hinting at ... company to wait until March 2017 for an interest rate increase, according to Rajeev ... of Business. , “The Federal Open Market Committee (FOMC) dot charts are of interest ...
(Date:5/26/2016)... ... 2016 , ... Georgia State University College of Law is ... Answering to the increasing demand for curricular specializations, the Certificate in Intellectual Property ... land use law. ,  , “The demand for lawyers with specific knowledge in ...
(Date:5/26/2016)... ... 2016 , ... There are nearly 14.5 million people living with and beyond ... Sunday, June 5, 2016, communities around the world will gather to recognize these cancer ... Cancer Survivors Day® is an annual worldwide Celebration of Life that is held on ...
(Date:5/26/2016)... ... ... effort to provide hair restoration information to the widest possible audience, Dr. Parsa Mohebi is ... the app. Dr. Mohebi, the founder of Parsa Mohebi Hair Restoration, is making all of ... Mohebi says, “The positive response to the Snapchat videos we started last month has been ...
Breaking Medicine News(10 mins):
(Date:5/24/2016)... joined VMS BioMarketing as senior vice president of sales, announced Andrea Heslin Smiley ... lead the company,s business development and sales team, exploring new opportunities for VMS to ... http://photos.prnewswire.com/prnh/20160523/371089 ... ... ...
(Date:5/24/2016)... HONG KONG , May 24, 2016 /PRNewswire/ ... primer stent de doble terapia del mundo, introduce ... fístula arteriovenosa. OrbusNeich, una compañía global ... cambian las vidas, ha expandido su cartera incluyendo ... catéteres balón JADE™ y Scoreflex™ PTA son los ...
(Date:5/24/2016)... , May 24, 2016 ... Education in Clinical Neurophysiology  Elsevier , ... products and services, today announced the launch of ... open access journal that focuses on clinical practice issues ... case reports, clinical series, normal values and didactic reviews. ...
Breaking Medicine Technology: