Tag Archives: neurodegenerative disorders

New Theory About the Cause of Alzheimer’s Disease – a Prenatal Link?

22 Feb

pj-ao487_resear_g_20090218123227New research at Genentech provides a provocative theory about the cause of Alzheimer’s disease and   suggests potential new targets for therapies to treat it, reports Ron Winslow in the February 19 issue of the Wall Street Journal.

The prevailing view about what causes Alzheimer’s disease is that  deposits called beta amyloid accumulate in the brain, destroying nerve cells and ultimately, the patient’s memory.  Now, new research shows there’s a very different way of looking at the disease.

The Genentech/Salk Institute team of researchers propose that a normal process in which excess nerve cells and nerve fibers are pruned from the brain during prenatal development is somehow reactivated in the adult brain and “hijacked” to cause the death of such cells in Alzheimer’s patients, writes Winslow.

According to Marc Tessier-Lavigne, executive vice president, research drug discovery at Genentech, the new findings offer evidence that “Alzheimer’s is not just bad luck, but rather it is the activation of a pathway that is there for development purposes.”

Genentech has identified potential drug candidates based on the findings and says that it may take many years for any potential treatment to be developed.

The research was published Thursday in the journal Nature.

NOTE: The photos of normal and dead nerve fibers above are from Dr. Tessier-Lavigne.

New Gene Therapy Targets Alzheimer’s

15 Feb

bankiewiczA new approach to delivering gene therapy to the brain to treat neurodegenerative diseases such as Alzheimer’s, was revealed in research findings published in the February 4 online edition of the Proceedings of the National Academy of Sciences.

UCSF neuroscientist Dr. Krystof Bankiewicz has developed a promising way to get nerve cells to help disperse gene therapy to targeted brain cells. He uses a technique called convection-enhanced delivery. The fluid containing the gene therapy is injected under pressure, delivered in pulses. Says Bankiewicz:

For the first time, specific regions of the cortex can be supplied with therapeutic agents by targeting defined regions of the thalamus…Translational experiments now are in progress to evaluate the potential of this unique gene delivery technology for the treatment of cortical dementias such as Alzheimer’s disease…

Bankiewicz’s research at UCSF has a strong focus on the development of practical approaches to gene and cell replacement therapies; he synthesizes several individual technologies into powerful new approaches to the treatment of such serious disease as brain cancer and neurodegenerative disorders, including Parkinson’s disease.

Source: Science Cafe