Navigation Links
Major advance in understanding risky but effective multiple sclerosis treatment
Date:3/26/2013

A new study by Multiple Sclerosis researchers at three leading Canadian centres addresses why bone marrow transplantation (BMT) has positive results in patients with particularly aggressive forms of MS. The transplantation treatment, which is performed as part of a clinical trial and carries potentially serious risks, virtually stops all new relapsing activity as observed upon clinical examination and brain MRI scans. The study reveals how the immune system changes as a result of the transplantation. Specifically, a sub-set of T cells in the immune system known as Th17 cells, have a substantially diminished function following the treatment. The finding to be published in the upcoming issue of Annals of Neurology and currently in the early online version, provides important insight into how and why BMT treatment works as well as how relapses may develop in MS.

"Our study examined why patients essentially stop having relapses and new brain lesions after the bone marrow transplant treatment, which involves ablative chemotherapy followed by stem cell transplantation using the patient's own cells," said Prof. Amit Bar-Or, the principle investigator of the study, who is a neurologist and MS researcher at The Montreal Neurological Institute and Hospital -The Neuro, McGill University, and Director of The Neuro's Experimental Therapeutics Program. "We discovered differences between the immune responses of these patients before and after treatment, which point to a particular type of immune response as the potential perpetrator of relapses in MS."

"Although the immune system that re-emerges in these patients from their stem cells is generally intact, we identified a selectively diminished capacity of their Th17 immune responses following therapy - which could explain the lack of new MS disease activity. In untreated patients, these Th17 cells may be particularly important in breaching the blood-brain-barrier, which normally protects the central nervous system. This interaction of Th17 cells with the blood-brain barrier can facilitate subsequent invasion of other immune cells such as Th1 cells, which are thought to also contribute to brain cell injury.

Twenty-four patients participated in the overall clinical trial as part of the 'Canadian MS BMT' clinical trial, coordinated by Drs. Mark Freedman and Harry Atkins at the Ottawa General Hospital. The new discovery, made in a subset of patients participating in the clinical trial, was based on immunological studies carried out jointly in laboratories at The Neuro and the Universit de Montral. Results of this study not only show the clinical benefits of BMT treatment, but also open a unique window into the immunological mechanisms underlying relapses in MS. Th17 cells could be the immune cells associated with the initiation of new relapsing disease activity in this group of patients with aggressive MS. This finding deepens our understanding of MS and could guide the development of personalized medicine with a more favourable risk/benefit profile.

Among the patients treated in the Canadian MS BMT clinical trial, was Dr. Alexander Normandin, a family doctor, who was a third- year McGill medical student getting ready for his surgery exams when he first learned he had MS, "I was so engrossed in my studies that I didn't pay attention to the first sign but within a few days of waking up with a numb temple, my face felt frozen. I learned that I had a very aggressive form of MS and would probably be in a wheelchair within a year. It was a brutal blow. I became patient #19 of only 24 for this experimental treatment. My immune system was knocked out and then rebooted with my stem cells. Today, my MS has stabilized. I now have this disease under control and I take it one day at a time."


'/>"/>
Contact: Anita Kar
anita.kar@mcgill.ca
514-398-3376
McGill University
Source:Eurekalert

Related medicine news :

1. Scientists identify major source of cells defense against oxidative stress
2. Majority of Californias Medi-Cal caregivers live in or near poverty
3. Study reveals major funding shortfall and high death rates for emergency laparotomy
4. Groundbreaking Nigeria summit results in major commitment to reduce child deaths
5. Majority of states fail to address youth exposure to alcohol marketing
6. Researchers determine vitamin D blood level for reducing major medical risks in older adults
7. Dengue Fever a Major Cost Burden in Puerto Rico
8. Living Near Major Roads May Shorten Heart Attack Survival
9. Bias found in mental health drug research presented at major psychiatric meeting
10. The Tennessee Car Accident Lawyers at Michael D. Ponce & Associates Alert Public of CDC Survey Revealing Majority of High School Seniors Admitting to Texting Behind Wheel
11. Infant Formula Can Be a Major Source of BPA: Experts
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/10/2016)... PLAINSBORO, N.J. (PRWEB) , ... ... ... J. Hennessy Associates, Inc. , a full-service health care communications company offering ... integrated digital news resource for practitioners and specialists working in infectious diseases. ...
(Date:2/10/2016)... ... February 10, 2016 , ... As part of its ongoing ... February 2016. Each webinar features a dynamic expert and thoughtful presentation to give ... patients and facilities. Both events are free to attend, but registration is ...
(Date:2/10/2016)... , ... February 10, 2016 , ... ... solution, The Guard, to associations of medical professionals throughout the country. The Guard ... security risk assessments, policies and procedures, employee training, regulatory updates, and compliance coaching. ...
(Date:2/10/2016)... ... February 10, 2016 , ... 10 Best Water is excited ... bottled water brand owners that topped the list as a result of their commitment ... The premier brand was Tibet 5100, a top notch water company that specializes in ...
(Date:2/10/2016)... ... ... Ongoing news of the ravages of traumatic brain injury (TBI) among former NFL ... a closer look at cases of TBI being managed by their members. The survey ... aging population, and identifies the challenges associated with their care. , During the week ...
Breaking Medicine News(10 mins):
(Date:2/10/2016)... Feb. 10, 2016 CSI Specialty Group (CSI) ... launch of the Specialty Pharmacy Podcast. A free, weekly ... at providing real-world education, discussion and context amongst specialty ... --> The Specialty Pharmacy Podcast, ... CSI Specialty Group Suzette DiMascio, CHE, CMCE, CPC, is ...
(Date:2/10/2016)... WOONSOCKET, R.I. , Feb. 10, 2016  CVS ... vaccines to people living in Santa Clara ... of Meningitis B on the Santa Clara University campus. ... vaccines available to protect patients against the disease. Students ... are encouraged to get vaccinated. In addition, anyone who ...
(Date:2/10/2016)... Feb. 10, 2016  Rich Pharmaceuticals, Inc. (OTC Markets: ... 1-for-100 reverse split of its issued and outstanding shares ... on Thursday, February 11, 2016. The Company,s common stock ... number 76303T308 and temporary ticker symbol "RCHAD". After 20 ... the ticker symbol (RCHA).  --> ...
Breaking Medicine Technology: