Multiple Sclerosis Breakthrough with Nanoparticle
Posted by on November 30, 2012 - 4:22pm

In a breakthrough for nanotechnology and multiple sclerosis, a biodegradable nanoparticle turns out to be the perfect vehicle to stealthily deliver an antigen that tricks the immune system into stopping its attack on myelin and halt a model of relapsing remitting multiple sclerosis (MS) in mice, according to new Northwestern Medicine research.

The new nanotechnology also can be applied to a variety of immune-mediated diseases including, Type 1 diabetes, food allergies, and airway allergies such as asthma.

In MS, the immune system attacks the myelin membrane that insulates nerves cells in the brain, spinal cord, and optic nerve. When the insulation is destroyed, electrical signals can’t be effectively conducted, resulting in symptoms that range from mild limb numbness to paralysis or blindness. About 80 percent of MS patients are diagnosed with the relapsing remitting form of the disease.

The Northwestern nanotechnology does not suppress the entire immune system as do current therapies for MS, which make patients more susceptible to everyday infections and higher rates of cancer. Rather, when the nanoparticles are attached to myelin antigens and injected into the mice, the immune system is reset to normal. The immune system stops recognizing myelin as an alien invader and halts its attack on it.

“This is a highly significant breakthrough in translational immunotherapy,” said Stephen Miller, PhD, a corresponding author of the study at Northwestern University Feinberg School of Medicine. “The beauty of this new technology is it can be used in many immune-related diseases. We simply change the antigen that’s delivered.”

“The holy grail is to develop a therapy that is specific to the pathological immune response, in this case the body attacking myelin,” Miller added. “Our approach resets the immune system so it no longer attacks myelin but leaves the function of the normal immune system intact.“

The nanoparticle, made from an easily produced and already FDA-approved substance, was developed by Lonnie Shea, professor of chemical and biological engineering at Northwestern’s McCormick School of Engineering and Applied Science.

“This is a major breakthrough in nanotechnology, showing you can use it to regulate the immune system,” said Shea, also a corresponding author. The paper will be published Nov. 18 in the journal Nature Biotechnology.

Source:   NewsCenter Northwestern U.

 

Women with neurologic issues need specialized care
Posted by on October 27, 2012 - 7:49am

Conditions that affect the brain can be more complicated in women compared to men, partly because of hormones and reproductive issues.   Did you know:

  • Twenty percent of women have migraines
  • Primary care doctors often ignore sleep disorders in women
  • Epilepsy and its treatment can be impacted by hormonal cyclic changes
  • Neurologic treatments interfere with contraceptive effectiveness and fertility
  • Stroke mortality is higher in women than men but 30% of women are unaware of this fact.

To address these concerns at NorthwesternMedicine, a group of neurology specialists who have a strong interest in women's health and sex-specific care have opened the Women's Neurology Clinic at Northwestern.  The center plans to incorporate integrated medicine approaches and  not rely solely on pharmacologic interventions.    To learn more about this clinic, visit their website.