Related Experiment Video
Updated: May 10, 2026
Gene-environment Interaction Models to Unmask Susceptibility Mechanisms in Parkinson's Disease
Published on: January 7, 2014
Neuroprotective effects of α-ketoglutarate and ethyl pyruvate against motor dysfunction and oxidative changes caused
R Satpute1, V Lomash, M Kaushal
1Toxicology Laboratory, Defence Research and Development Establishment, Nagpur, India. ravi4res@gmail.com
Abstract:
1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) is a neurotoxin associated with drug abuse and causes permanent symptoms of Parkinson's disease (PD) by destroying dopaminergic neurons in the substantia nigra of the brain. In the present study, the neuroprotective effects of two carboxylic acid compounds, viz. alpha-ketoglutarate (A-KG), a Kreb's cycle intermediate and ethyl pyruvate (EP), a lipid-soluble analogue of pyruvate, were evaluated against MPTP intoxication in mice and compared with madopar (MD; combination of levodopa plus benserazide), a standard drug. Animals received oral treatment of A-KG (500 mg/kg), EP (100 mg/kg) or MD (5 mg/kg) daily for 5 days followed by intraperitoneal administration of MPTP (20 mg/kg) and posttreatment (+10 min) of A-KG, EP or MD daily for the remaining 5 days. MPTP caused the inhibition of complex I of electron transport chain accompanied by oxidative stress in the brain. It also caused cytotoxicity in the midbrain region as characterized by histology and immunohistochemistry. Treatments of A-KG and EP were found to resolve the loss of motor coordination, oxidative stress, diminished complex I activity and tyrosine hydroxylase-positive neurons in midbrain. A-KG and EP also regressed the histological damage in the brain and minimized the accumulation of alpha-synuclein in the midbrain region. The data suggest that A-KG and EP which are nontoxic carboxylic acid compounds could be of potential therapeutic value in the treatment of PD.
Insights
Alpha-ketoglutarate (A-KG) and ethyl pyruvate (EP) show neuroprotective effects against Parkinson's disease (PD) symptoms in mice. These compounds may offer therapeutic potential for PD treatment.
Area of Science:
- Neuroscience
- Biochemistry
- Pharmacology
Background:
- 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) is a neurotoxin that induces Parkinson's disease (PD) symptoms by damaging dopaminergic neurons.
- MPTP intoxication leads to complex I inhibition, oxidative stress, and cytotoxicity in the midbrain.
Purpose of the Study:
- To evaluate the neuroprotective effects of alpha-ketoglutarate (A-KG) and ethyl pyruvate (EP) against MPTP-induced neurotoxicity in a mouse model.
- To compare the efficacy of A-KG and EP with madopar (MD), a standard PD treatment.
Main Methods:
- Mice were treated with A-KG, EP, or MD daily for 5 days, followed by MPTP administration and continued posttreatment with A-KG, EP, or MD for another 5 days.
- Neuroprotection was assessed by evaluating motor coordination, oxidative stress markers, complex I activity, tyrosine hydroxylase-positive neurons, histological damage, and alpha-synuclein accumulation in the midbrain.
Main Results:
- MPTP intoxication caused motor coordination deficits, oxidative stress, reduced complex I activity, and neuronal damage in the midbrain.
- A-KG and EP treatments significantly improved motor coordination, reduced oxidative stress, restored complex I activity, and protected tyrosine hydroxylase-positive neurons.
- Both A-KG and EP treatments attenuated histological damage and minimized alpha-synuclein accumulation in the midbrain.
Conclusions:
- A-KG and EP demonstrate significant neuroprotective effects against MPTP-induced Parkinsonism in mice.
- These non-toxic carboxylic acid compounds show potential as therapeutic agents for Parkinson's disease treatment.
Related Concept Videos
01:29Hepatic Encephalopathy
01:26Anticholinesterase Agents: Poisoning and Treatment
Irreversible agents form a strong bond with the cholinesterase enzyme, making it inactive. The breakdown of the phosphorylated enzyme is slower than the...