Navigation Links
Mitochondria play role in pathogenesis of AD and estrogen-induced neuroprotection
Date:4/5/2008

As the major source of free radicals in cells, mitochondria contribute to the high levels of oxidative stress believed to play a role in the pathogenesis of Alzheimers disease. Now, a new study from the laboratory of Dr. Roberta Brinton, University of Southern California, demonstrates that estrogen reduces this oxidative stress caused by the mitochondria while increasing the ability of the mitochondria to generate energy important since there is usually an energy deficit in the Alzheimer brain.

The study was presented April 5 at Experimental Biology 2008 in San Diego by Jia Yao, a graduate student in Dr. Brintons laboratory. The presentation is part of the scientific program of the American Association of Anatomists (AAA), and Mr. Yaos presentation is a finalist for the AAA Langman Graduate Studet Platform Presentation Award. He also received an AAA travel award.

Mitochondria, small organelles within the cells, use a process called Oxidative Phosphorylation to generate the vast majority of the adenosine triposphate (ATP) molecules that cells utilize to function properly. If the mitochondria become less efficient with age or disease, they use less up oxygen during this process. This inefficiency produces a double hit against the brain: fewer energy molecules being produced and more free radicals being released, leading to damaging oxidative stress.

Using a combination of biochemical and proteomic (protein) approaches, Dr. Brintons research team demonstrated how estrogen acts to regulate mitochondrial function in ways pivotal for protection against Alzheimers disease. These include:

  • an increase of mitochondrial efficiency, enhancing the organelles ability to generate energy-laden ATP molecules needed by the brain;

  • increased expression of key proteins required for ATP generation;

  • reduction of oxidative stress, protecting neurons from oxidative damage;

  • prevention of excess apoptosis, or programmed cell death, of neurons of the brain;

  • and protection of neurons from mitochondrial toxins, which can induce further mitochondrial dysfunction and cell death.

Dr. Brinton and her research team currently are validating the energy-production levels of mitochondria as a biomarker that could detect the presence of Alzheimers in the earliest stages, when the neurodegenerative process might be stopped or slowed or therapeutics be more effective. They believe this new information on how estrogen regulates mitochondrial function also sheds light on how to develop a new generation of effective Alzheimer therapeutics. Dr. Brinton currently is developing new, brain specific molecules that promote neurological defense against Alzheimers, using similar mechanisms as estrogen, but without estrogens negative side effects.


'/>"/>

Contact: Sylvia Wrobel
ebpress@gmail.com
770-722-1055
Federation of American Societies for Experimental Biology
Source:Eurekalert

Related medicine news :

1. Study looks at mitochondrial variation in sperm traits and sperm competitive ability
2. 454 Sequencing(TM): Science Paper Describes a Novel, Highly Efficient Method of Sequencing Ancient DNA; Sequences the Mitochondria of 10 Individual Mammoths to Prove It
3. Mitochondria send death signal to cardiac cells, study shows
4. Agent orange chemical, dioxin, attacks the mitochondria to cause cancer, says Penn research team
5. Mitochondrial bottleneck cracked
6. In silico modeling helps predict severity of mitochondrial disease
7. Single Mutation in Mitochondrial DNA Weakens Heart, Muscles
8. United Mitochondrial Disease Foundation Statement on Vaccines, Autism and Mitochondrial Disease
9. MITOCHONDRIAL DYSFUNCTION, VACCINES AND AUTISM: 1 in 50 Children Could Be at Risk
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/27/2017)... ... 2017 , ... The Incentive Research Foundation is pleased to ... a groundbreaking analysis of how behavioral economics can be applied to the incentive, ... programs, the report highlights proven behavioral economics approaches and the powerful role emotions ...
(Date:4/27/2017)... ... April 27, 2017 , ... Last night, ... CAREGiverSM of the Year for her extraordinary compassion and lifelong dedication to serve ... American professional caregivers for the prestigious award each year – identifying a CAREGiver ...
(Date:4/27/2017)... Atlanta, GA (PRWEB) , ... April 27, 2017 , ... ... is a tragic spike in water-related accidents and drownings during the summer. While most ... reality is that these situations occur every day. Very few people are taking the ...
(Date:4/26/2017)... ... April 26, 2017 , ... Journal of Oral Implantology ... severe consequences to overall dental health, including complications with speech, eating, and overcompensation of ... implants to replace lost teeth. As the number of tooth replacements increase, it is ...
(Date:4/26/2017)... ... April 26, 2017 , ... Elisabete Miranda, president and ... by Enterprising Women magazine as one of its 2017 Enterprising Women of the ... Winners have demonstrated that they have fast-growth businesses, mentor or actively support other ...
Breaking Medicine News(10 mins):
(Date:4/20/2017)... MINNEAPOLIS , April 20, 2017  Cogentix ... company focused on providing the Urology, Uro/Gyn and ... reported that Ash Keswani has joined the Company ... In this newly created position, Mr. Keswani will ... and CEO. "Our organization is delighted ...
(Date:4/20/2017)... 2017 Research and Markets has ... and Market Prospects: Addressing Production Complexities Through Risk Management ... ... Biosimilar Pipeline and Market Prospects: Overcoming Production Complexities Through ... assessment of the current trends in the global biosimilars ...
(Date:4/20/2017)... 2017  CVS Pharmacy, the retail division of ... store design to enhance the retail customer experience ... products and expanded beauty selections paired with informational ... new offerings. Together with its innovative digital programs, ... customer experience at CVS Pharmacy.  ...
Breaking Medicine Technology: