Some people are more predisposed to suffer Parkinson’s disease than others, a fraction of those due to mutations in genes involved in mitochondrial quality control. The state of mitochondrial function shows up as an important component of many different conditions and indeed in aging itself. In Parkinson’s disease it is thought that mitochondrial dysfunction contributes to the conditions in which the population of dopamine-producing neurons in the brain die off, producing the characteristic symptoms of the disease.
It may be that more of Parkinson’s disease is genetic than was previously thought, and the odds of that being the case increase as the chain of molecular machinery involved in mitochondrial quality control is followed and new components identified. This sort of work also helps clarify the mechanisms associated with mitochondrial dysfunction in aging:
Mitofusin 2 (Mfn2) is known for its role in fusing mitochondria together, so they might exchange mitochondrial DNA in a primitive form of sexual reproduction. “Mitofusins look like little Velcro loops. They help fuse together the outer membranes of mitochondria. Mitofusins 1 and 2 do pretty much the same thing in terms of mitochondrial fusion. What we have done is describe an entirely new function for Mfn2.”
Mitochondria work to import a molecule called PINK. Then they work to destroy it. When mitochondria get sick, they can’t destroy PINK and its levels begin to rise. Once PINK levels get high enough, they make a chemical change to Mfn2, which sits on the surface of mitochondria. This chemical change is called phosphorylation. Phosphorylated Mfn2 on the surface of the mitochondria can then bind with a molecule called Parkin that floats around in the surrounding cell.
Once Parkin binds to Mfn2 on sick mitochondria, Parkin labels the mitochondria for destruction. The labels then attract special compartments in the cell that “eat” and destroy the sick mitochondria. As long as all links in the quality-control system work properly, the cells’ damaged power plants are removed, clearing the way for healthy ones. “But if you have a mutation in PINK, you get Parkinson’s disease. And if you have a mutation in Parkin, you get Parkinson’s disease. About 10 percent of Parkinson’s disease is attributed to these or other mutations that have been identified.” The discovery of Mfn2′s relationship to PINK and Parkin opens the doors to a new genetic form of Parkinson’s disease.
Link: http://www.sciencedaily.com/releases/2013/04/130425142357.htm
Source:
http://www.fightaging.org/archives/2013/04/joining-the-dots-in-genetic-parkinsons-disease.php
Source:
http://www.longevitymedicine.tv/joining-the-dots-in-genetic-parkinsons-disease/
- Vitamin K Delivers Kick to Cancer Risk [Last Updated On: August 17th, 2024] [Originally Added On: April 7th, 2010]
- Magnesium for Memory [Last Updated On: August 17th, 2024] [Originally Added On: April 7th, 2010]
- The Long Road Towards Prosthetic Nerves [Last Updated On: August 17th, 2024] [Originally Added On: April 9th, 2010]
- More on DAF-16 and Longevity in Nematodes [Last Updated On: August 17th, 2024] [Originally Added On: April 9th, 2010]
- Rapamycin and Alzheimer's Disease [Last Updated On: August 17th, 2024] [Originally Added On: April 9th, 2010]
- Rapamycin and Alzheimer's Disease [Last Updated On: August 17th, 2024] [Originally Added On: April 9th, 2010]
- Better Understanding Cytomegalovirus [Last Updated On: August 17th, 2024] [Originally Added On: April 9th, 2010]
- On Mitophagy and Aging [Last Updated On: August 17th, 2024] [Originally Added On: April 9th, 2010]
- A Trial of Giving Stem Cells Orders [Last Updated On: August 17th, 2024] [Originally Added On: April 9th, 2010]
- Methuselah Foundation Launches NewOrgan Prize [Last Updated On: August 17th, 2024] [Originally Added On: April 9th, 2010]
- The Contributions of Mitochondria to Longevity [Last Updated On: August 17th, 2024] [Originally Added On: April 9th, 2010]
- Dual Action Antibodies Versus Cancer [Last Updated On: August 17th, 2024] [Originally Added On: April 9th, 2010]
- Longevity and the End of Empire [Last Updated On: August 17th, 2024] [Originally Added On: April 9th, 2010]
- The Long Road Towards Prosthetic Nerves [Last Updated On: August 17th, 2024] [Originally Added On: April 10th, 2010]
- More on DAF-16 and Longevity in Nematodes [Last Updated On: August 17th, 2024] [Originally Added On: April 10th, 2010]
- Rapamycin and Alzheimer’s Disease [Last Updated On: August 17th, 2024] [Originally Added On: April 10th, 2010]
- Better Understanding Cytomegalovirus [Last Updated On: August 17th, 2024] [Originally Added On: April 10th, 2010]
- On Mitophagy and Aging [Last Updated On: August 17th, 2024] [Originally Added On: April 10th, 2010]
- A Trial of Giving Stem Cells Orders [Last Updated On: August 17th, 2024] [Originally Added On: April 10th, 2010]
- Methuselah Foundation Launches NewOrgan Prize [Last Updated On: August 17th, 2024] [Originally Added On: April 10th, 2010]
- The Contributions of Mitochondria to Longevity [Last Updated On: August 17th, 2024] [Originally Added On: April 10th, 2010]
- Dual Action Antibodies Versus Cancer [Last Updated On: August 17th, 2024] [Originally Added On: April 10th, 2010]
- Longevity and the End of Empire [Last Updated On: August 17th, 2024] [Originally Added On: April 10th, 2010]
- Longevity Meme Newsletter, April 12 2010 [Last Updated On: August 17th, 2024] [Originally Added On: April 12th, 2010]
- Printing New Tissue Directly Onto the Body [Last Updated On: August 17th, 2024] [Originally Added On: April 12th, 2010]
- Reprogramming Autoimmune Disease [Last Updated On: August 17th, 2024] [Originally Added On: April 12th, 2010]
- Diet and Exercise Can Override the Genetic Disposition towards Obesity [Last Updated On: August 17th, 2024] [Originally Added On: April 12th, 2010]
- Your Heart Truly Loves Chocolate! [Last Updated On: August 17th, 2024] [Originally Added On: April 12th, 2010]
- CSC news roundup 2010-04-11 [Last Updated On: August 17th, 2024] [Originally Added On: April 13th, 2010]
- Longevity Meme Newsletter, April 12 2010 [Last Updated On: August 17th, 2024] [Originally Added On: April 13th, 2010]
- Printing New Tissue Directly Onto the Body [Last Updated On: August 17th, 2024] [Originally Added On: April 13th, 2010]
- Reprogramming Autoimmune Disease [Last Updated On: August 17th, 2024] [Originally Added On: April 13th, 2010]
- Diet and Exercise Can Override the Genetic Disposition towards Obesity [Last Updated On: August 17th, 2024] [Originally Added On: April 13th, 2010]
- Your Heart Truly Loves Chocolate! [Last Updated On: August 17th, 2024] [Originally Added On: April 13th, 2010]
- Trialing Stem Cells to Heal Heart Damage [Last Updated On: August 17th, 2024] [Originally Added On: April 13th, 2010]
- Selection Effects and Longevity Genes [Last Updated On: August 17th, 2024] [Originally Added On: April 13th, 2010]
- How Exercise Can Awaken Your Creative Genius Within [Last Updated On: August 17th, 2024] [Originally Added On: April 13th, 2010]
- Trialing Stem Cells to Heal Heart Damage [Last Updated On: August 17th, 2024] [Originally Added On: April 14th, 2010]
- Selection Effects and Longevity Genes [Last Updated On: August 17th, 2024] [Originally Added On: April 14th, 2010]
- How Exercise Can Awaken Your Creative Genius Within [Last Updated On: August 17th, 2024] [Originally Added On: April 14th, 2010]
- WILT, ALT, and Zscan4 [Last Updated On: August 17th, 2024] [Originally Added On: April 14th, 2010]
- Damage in Early Life Shortens Life Expectancy [Last Updated On: August 17th, 2024] [Originally Added On: April 14th, 2010]
- WILT, ALT, and Zscan4 [Last Updated On: August 17th, 2024] [Originally Added On: April 15th, 2010]
- Damage in Early Life Shortens Life Expectancy [Last Updated On: August 17th, 2024] [Originally Added On: April 15th, 2010]
- Synthetic Biology and the Extracellular Matrix [Last Updated On: August 17th, 2024] [Originally Added On: April 15th, 2010]
- The Tithonus Error as Prospection Error [Last Updated On: August 17th, 2024] [Originally Added On: April 15th, 2010]
- F.D.A. Says Millions Got Unapproved Drugs, Should the new bioequivalence and bioanalytical guidelines for 2010, be made more stringent [Last Updated On: August 17th, 2024] [Originally Added On: April 16th, 2010]
- Synthetic Biology and the Extracellular Matrix [Last Updated On: August 17th, 2024] [Originally Added On: April 16th, 2010]
- The Tithonus Error as Prospection Error [Last Updated On: August 17th, 2024] [Originally Added On: April 16th, 2010]
- Towards an Artificial Pancreas [Last Updated On: August 17th, 2024] [Originally Added On: April 16th, 2010]
- Immortality Isn't Unethical [Last Updated On: August 17th, 2024] [Originally Added On: April 16th, 2010]
- Immortality Isn't Unethical [Last Updated On: August 17th, 2024] [Originally Added On: April 16th, 2010]
- Alcohol in Adolescence: A Cancerous Combination? [Last Updated On: August 17th, 2024] [Originally Added On: April 16th, 2010]
- Green Tea for Weight Loss [Last Updated On: August 17th, 2024] [Originally Added On: April 16th, 2010]
- Towards an Artificial Pancreas [Last Updated On: August 17th, 2024] [Originally Added On: April 17th, 2010]
- Immortality Isn’t Unethical [Last Updated On: August 17th, 2024] [Originally Added On: April 17th, 2010]
- Alcohol in Adolescence: A Cancerous Combination? [Last Updated On: August 17th, 2024] [Originally Added On: April 17th, 2010]
- Green Tea for Weight Loss [Last Updated On: August 17th, 2024] [Originally Added On: April 17th, 2010]
- On Calorie Restriction Research [Last Updated On: August 17th, 2024] [Originally Added On: April 17th, 2010]
- AGE Precursor Methylglyoxal Also an Issue? [Last Updated On: August 17th, 2024] [Originally Added On: April 17th, 2010]
- On Calorie Restriction Research [Last Updated On: August 17th, 2024] [Originally Added On: April 18th, 2010]
- AGE Precursor Methylglyoxal Also an Issue? [Last Updated On: August 17th, 2024] [Originally Added On: April 18th, 2010]
- Longevity Meme Newsletter, April 19 2010 [Last Updated On: August 17th, 2024] [Originally Added On: April 19th, 2010]
- Let Them Eat Wheat [Last Updated On: August 17th, 2024] [Originally Added On: April 19th, 2010]
- An Appetite for Alzheimer’s Avoidance [Last Updated On: August 17th, 2024] [Originally Added On: April 19th, 2010]
- Steps Towards Controlling Regeneration [Last Updated On: August 17th, 2024] [Originally Added On: April 20th, 2010]
- Another View of What to Do About Aging [Last Updated On: August 17th, 2024] [Originally Added On: April 20th, 2010]
- Rare flowers and common herbal supplements get unmasked with plant DNA barcoding [Last Updated On: August 17th, 2024] [Originally Added On: April 21st, 2010]
- Steps Towards Controlling Regeneration [Last Updated On: August 17th, 2024] [Originally Added On: April 21st, 2010]
- Another View of What to Do About Aging [Last Updated On: August 17th, 2024] [Originally Added On: April 21st, 2010]
- Stopping Metastasis [Last Updated On: August 17th, 2024] [Originally Added On: April 21st, 2010]
- Humanity+ Summit at Harvard [Last Updated On: August 17th, 2024] [Originally Added On: April 21st, 2010]
- Stopping Metastasis [Last Updated On: August 17th, 2024] [Originally Added On: April 22nd, 2010]
- Humanity+ Summit at Harvard [Last Updated On: August 17th, 2024] [Originally Added On: April 22nd, 2010]
- An Update on Scent and Longevity [Last Updated On: August 17th, 2024] [Originally Added On: April 22nd, 2010]
- Tissue Engineered Skin Progresses [Last Updated On: August 17th, 2024] [Originally Added On: April 22nd, 2010]
- Because Someone Has to State the Obvious [Last Updated On: August 17th, 2024] [Originally Added On: April 23rd, 2010]
- Deciphering Regeneration [Last Updated On: August 17th, 2024] [Originally Added On: April 23rd, 2010]
- Politics and Historical Aspirations to Engineered Longevity [Last Updated On: August 17th, 2024] [Originally Added On: April 24th, 2010]
- Exercise and Alzheimer's Disease [Last Updated On: August 17th, 2024] [Originally Added On: April 24th, 2010]