Navigation Links
Powerful class of antioxidants may be potent Parkinson's treatment

AUGUSTA, Ga. A new and powerful class of antioxidants could one day be a potent treatment for Parkinson's disease, researchers report.

A class of antioxidants called synthetic triterpenoids blocked development of Parkinson's in an animal model that develops the disease in a handful of days, said Dr. Bobby Thomas, neuroscientist at the Medical College of Georgia at Georgia Health Sciences University and corresponding author of the study in the journal Antioxidants & Redox Signaling.

Thomas and his colleagues were able to block the death of dopamine-producing brain cells that occurs in Parkinson's by using the drugs to bolster Nrf2, a natural antioxidant and inflammation fighter.

Stressors from head trauma to insecticide exposure to simple aging increase oxidative stress and the body responds with inflammation, part of its natural repair process. "This creates an environment in your brain that is not conducive for normal function," Thomas said. "You can see the signs of oxidative damage in the brain long before the neurons actually degenerate in Parkinson's."

Nrf2, the master regulator of oxidative stress and inflammation, is inexplicably significantly decreased early in Parkinson's. In fact, Nrf2 activity declines normally with age.

"In Parkinson's patients you can clearly see a significant overload of oxidative stress, which is why we chose this target," Thomas said. "We used drugs to selectively activate Nrf2."

They parsed a number of antioxidants already under study for a wide range of diseases from kidney failure to heart disease and diabetes, and found triterpenoids the most effective on Nrf2. Co-author Dr. Michael Sporn, Professor of Pharmacology, Toxicology and Medicine at Dartmouth Medical School, chemically modified the agents so they could permeate the protective blood-brain barrier.

Both in human neuroblastoma and mouse brain cells they were able to document an increase in Nrf2 in response to the synthetic triterpenoids. Human dopaminergic cells are not available for research so the scientists used the human neuroblastoma cells, which are actually cancer cells that have some properties similar to neurons.

Their preliminary evidence indicates the synthetic triterpenoids also increase Nrf2 activity in astrocytes, a brain cell type which nourishes neurons and hauls off some of their garbage. The drugs didn't protect brain cells in an animal where the Nrf2 gene was deleted, more proof that that Nrf2 is the drugs' target.

The researchers used the powerful neurotoxin MPTP to mimic Parkinson's-like brain cell damage in a matter of days. They are now looking at the impact of synthetic triterpenoids in an animal model genetically programmed to acquire the disease more slowly, as humans do. Collaborators at Johns Hopkins School of Medicine also will be providing induced pluripotent stem cells, adult stem cells that can be coaxed into forming dopaminergic neurons, for additional drug testing.

Contact: Toni Baker
Georgia Health Sciences University

Related biology news :

1. Powerful sequencing technology decodes DNA folding pattern
2. New study discovers powerful function of single protein that controls neurotransmission
3. Powerful new approach to attack flu virus
4. UTMB researchers create powerful new method to analyze genetic data
5. American College of Rheumatology releases first classification criteria for polymyalagia rheumatica
6. Desert to Rainforest global classroom links future teachers, classrooms in Phoenix and Panama
7. Weeding out invasive species with classical biological control
8. KIT researchers succeed in realizing a new material class
9. Large, medically important class of proteins starts to yield its secrets
10. Epigenetic signatures direct the repair potential of reprogrammed cells
11. New insight into mechanisms behind autoimmune diseases suggests a potential therapy
Post Your Comments:
Related Image:
Powerful class of antioxidants may be potent Parkinson's treatment
(Date:10/29/2015)... October 29, 2015 NXTD ... company focused on the growing mobile commerce market ... that StackCommerce, a leading marketplace to discover and ... Wocket® smart wallet on StackSocial for this holiday ... or the "Company"), a biometric authentication company focused ...
(Date:10/27/2015)... -- In the present market scenario, security is one ... verticals such as banking, healthcare, defense, electronic gadgets, and ... secure & simplified access control and growing rate of ... bank accounts, misuse of users, , and so on. ... and smartphones are expected to provide potential opportunities for ...
(Date:10/27/2015)... Synaptics Inc. (NASDAQ: SYNA ), the leader ... adopted the Synaptics ® ClearPad ® Series ... newest flagship smartphones, the Nexus 5X by LG and ... --> --> Synaptics works closely with ... in the joint development of next generation technologies. Together, ...
Breaking Biology News(10 mins):
(Date:11/24/2015)... Cepheid (NASDAQ: CPHD ) today announced ... conference, and invited investors to participate via webcast. ... December 1, 2015 at 11.00 a.m. Eastern Time ... December 1, 2015 at 11.00 a.m. Eastern Time ... York, NY      Tuesday, December 1, 2015 at ...
(Date:11/24/2015)... ... November 24, 2015 , ... International ... and one of the premier annual events for pharmaceutical manufacturing: 2015 Annual Meeting. ... 2015, where ISPE hosted the largest number of attendees in more than a ...
(Date:11/24/2015)... ... November 24, 2015 , ... This fall, global software solutions leader ... five states to develop and pitch their BIG ideas to improve health and wellness ... competing for votes to win the title of SAP's Teen Innovator, an all-expenses paid ...
(Date:11/24/2015)... Technologies Ltd. (OTCQB: TIKRF) today announced that its Annual General Meeting of ... Israel time, at the law offices of Goldfarb ... Floor, Tel Aviv, Israel . ... Tamir to the Board of Directors; , election of ... of an amendment to certain terms of options granted to our Chief ...
Breaking Biology Technology: