Parkinson's Flashcards
Parkinson’s
- Parkinson’s disease (PD): The second most common neurogenerative disorder after Alzheimer’s disease.
- In the disease there is a gradual loss of dopamine producing neurons in the substantia nigra.
- Neurons of the substantia nigra normally supply or enervate a part of the brain called the striatum.
- Loss of dopamine supply to the striatum leads to the characteristic tremor and movement disorders seen in the disease.
Parkinson’s: Sign and symptoms
SSSSS
Shake, shuffle, stiff, slow, speech
- Characteristic tremor often called ‘pill rolling’ which looks as if a patient is rolling a pill between their index finger and thumb.
- Muscle rigidity or dystonia stiff or weak muscles and difficulty maintaining posture.
- Shuffling gait (dragging feet)
- Constipation and loss of sense of smell may occur many years before Parkinson’s disease diagnosis.
- Bradykinesia or slowness of movement. Affects handwriting ( micrographia ), facial expression and speech.
Parkinson’s: Causes and risk factors
- Age, hereditary, sex.
- Mitochondrial dysfunction, inflammation and oxidative stress.
- Traumatic brain injury.
- Pesticides and herbicides.
- Manganese, iron, mercury, lead and aluminium toxicity.
- Poor calcium metabolism.
- Stress and depression.
- Recreational drugs, especially amphetamines.
PD: Alpha synuclein
- Similar to Alzheimer’s disease, Parkinson’s disease has a misfolded protein associated with its pathology.
- Misfolded alpha synuclein is thought to become misfolded due to excess oxidative stress.
- Once misfolded, alpha synuclein can form protein aggregates called Lewy bodies.
- Lewy body accumulates in and around dopamine neurons leading to further oxidative stress, mitochondrial dysfunction and finally dopamine neuron loss.
Parkinson’s: Metals
Manganese
Iron
Mercury
Parkinson’s: L-dopa
- Dopamine cannot cross the blood brain barrier (BBB). L-dopa can cross into the CNS where it converts into dopamine.
- Serotonin producing neurons also convert L-dopa to dopamine by using amino acid decarboxylase the same enzyme is used to make both dopamine and serotonin.
- Serotonin neurons can be damaged by L-dopa, resulting in some negative psychological effects.
- L-dopa drugs also include another drug called a decarboxylase inhibitor this drug inhibits L dopa
dopamine conversion outside the brain, resulting in a higher level of dopamine reaching the brain. - Vitamin B6 should be taken away from L-dopa medication as it may interfere with decarboxylase inhibitors.
Parkinson’s: Catecholaldehyde
Theory
Dopamine is metabolised by MAO-B leading to DOPAL.
Slowing down MAO B and speeding up DOPAL detoxification is considered to be a protective strategy for dopaminergic neurons.
Parkinson’s: Early warning signs
- Loss of sense of smell
- Constipation
Parkinson’s Diet
Permutter
MEND 1 and 2
Parkinson’s: Other considerations
- Hyperbaric oxygen (breathing pure oxygen in a pressurised room) can lessen psychiatric symptoms associated with PD.
- Avoid EMFs from mobile phones and microwaves. EMFs have been found to disrupt cell membrane calcium channels leading to oxidative / nitrosative stress in the CNS.
- Chelation of aluminium with Volvic , Fiji water and other chelators such as chlorella and coriander. Aluminium has been shown to displace iron from its stores leading to increased oxidative stress and protein misfolding.
- Alpha lipoic acid can chelate damaging iron deposits from ageing brains.
Herbs for brain health
BBB
* Gotu kola: neuroprotective (reversing neuronal
damage)
* Gingko biloba: circulatory stimulant, tissue perfusion enhancing.
* Ashwagandha
Parkinson’s disease:
* Mucuna pruriens : Contains L-dopa