Regulation of Neurotransmitter Levels (Dopamine) Flashcards Preview

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Flashcards in Regulation of Neurotransmitter Levels (Dopamine) Deck (11)
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1
Q

What is the pathogenesis of Parkinson’s Disease?

A

loss of dopaminergic neurons int he substantia nigra tot he corpus striatum

2
Q

What is the first symptom of Parkinson’s Disease?

A

loss of olfaction

3
Q

in Parkinson’s Disease what can be found post-mortem?

A

Lewy bodies

4
Q

What are Lewy Bodies?

A

abnormal aggregates of protein (alpha synuclein) [eosinophilic]

5
Q

in % how many dopaminergic neurons must be lost before the development of symptoms?

A

80%

6
Q

What is Levodopa? what is its 1/2 life?

A

amino acid isomer that can be taken into the BBB and used for the synthesis of dopamine
Short 1/2 life

7
Q

administration of levodopa must be accompanied by what? why?

A

dopa decarboxylase inhibitor because 90% of it its metabolised in the perophery

8
Q

What is the problem with administering levodopa too early in the disease?

A

can cause further loss of dopaminergic cells due to the ROS forming ability of dopamine [dopamine formation requires Fe]

9
Q

What are MAO B inhibitors used for?

A

to decrease the breakdown of dopamine

they may decrease disease progression

10
Q

Why are cholinergic antagonists given with L-dopa?

A

NOT given together

11
Q

Parkinson’s Disease risk factor

A

Age