HOME >> BIOLOGY >> NEWS
Amphetamine-related drugs ameliorate symptoms of Parkinson's

The debilitating effects of Parkinson's disease are well known: muscle rigidity, impaired movement, and the uncontrollable shaking that makes even the most mundane activity a challenge. The symptoms result from a progressive deterioration of neurons, found in the midbrain, that produce dopamine. With no cure on the horizon, the most common treatment involves administration of the dopamine precursor, L-DOPA, usually in pill form. Though symptoms subside at first, this treatment is rendered ineffective over time.

In a new study reported in the open-access journal PLoS Biology, Tatyana Sotnikova and colleagues from Duke University create a mouse model that recapitulates many of the symptoms of Parkinson's disease and use it to screen potential therapeutic drugs. By eliminating the dopamine transporter - the protein responsible for recycling the chemical into neurons - in mice, the authors reduced dopamine levels in the midbrain by 20-fold. In addition, chemically inhibiting dopamine production in these mice resulted in essentially unmeasurable levels of the neurotransmitter, since it could now neither be produced at normal levels nor be recycled.

The authors tested a number of drugs at various doses and found that in addition to L-DOPA-related treatments, drugs related to amphetamine were effective in ameliorating muscle rigidity, tremor, and impaired movement in these mice. Most effective was methylenedioxymethamphetamine HCl (MDMA), commonly known as ecstasy. It has been shown that amphetamines can trigger release of neurotransmitters such as dopamine, serotonin, and norepinephrine and cause sudden bursts in neurotransmission, leading to a feeling of alertness, increased muscular activity, and reduced fatigue. This study, however, shows that treating mice with MDMA does not increase dopamine levels; furthermore, treating the mice with drugs related to serotonin or norepinephrine did not ameliorate the disease's sympto
'"/>

Contact: Paul Ocampo
press@plos.org
415-624-1224
Public Library of Science
1-Aug-2005


Page: 1 2

Related biology news :

1. MIT model could predict cells response to drugs
2. New target for HIV/AIDS drugs and vaccine discovered
3. Modified mushrooms may yield human drugs
4. UGR researchers design an alternative to blood test to detect drugs in the body
5. Could fungal collection hold the key to new life-saving drugs?
6. Sensitivity to diverse range of chemotherapeutic drugs linked to common pathway
7. Scientists develop new drugs to fight colon and breast cancer more effectively
8. Anti-inflammatory drugs interact with HRT, and more
9. Generic biologic drugs unlikely to offer significant savings
10. Stem cells provide new tool for studying disease and identifying ALS drugs
11. Enhancing chemotherapys efficacy: New agent has synergistic effect with standard drugs

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:2/28/2017)... , Feb. 28, 2017   Acuant , a ... globally, announces significant enhancements to new and core technologies ... New products include mobile and desktop Acuant FRM TM ... - a real time manual review of identity ... technology provides the fastest and most accurate capture software ...
(Date:2/24/2017)... -- EyeLock LLC, a leader of iris-based identity authentication ... solution on the latest Qualcomm® Snapdragon™ 835 mobile ... Congress 2017 (February 27 – March 2, ... Stand 3E10. The Snapdragon 835 ... combination of hardware, software and biometrics technologies ...
(Date:2/14/2017)... , Feb. 14, 2017  Wake Forest Baptist ... as its new chief executive officer (CEO). Freischlag joins ... John D. McConnell , M.D., who last year ... at the Medical Center, after leading it since 2008. ... full scope of Wake Forest Baptist,s academic health system, ...
Breaking Biology News(10 mins):
(Date:3/28/2017)... ... March 28, 2017 , ... Executive search firm, Slone Partners, ... Services. Harvill is a distinguished life sciences expert with a proven track record ... in a wide range of services related to laboratory testing and analysis for ...
(Date:3/27/2017)... Cousins Properties (NYSE: CUZ ) announced today that ... a 10-year, approximately 125,000 square-foot lease at Corporate Center, a ... Westshore submarket of Tampa, FL. ... Center for their new location in Tampa ... officer of Cousins Properties. "Amgen is a cutting-edge global company ...
(Date:3/27/2017)... , March 27, 2017  The global market ... 2016, according to a new report from Kalorama ... testing is performed to evaluate disease progression, monitor ... among other reasons.  The healthcare market research firm,s ... , provides an overview of the medical laboratory ...
(Date:3/27/2017)... (PRWEB) , ... March 27, 2017 , ... PMG ... Trial Collaborations (CTC) conference presented by The Conference Forum in Boston on April ... they collaborate to drive improved clinical trial outcomes and bring them closer to the ...
Breaking Biology Technology:
Cached News: