Mitochondropathies Flashcards

1
Q

V/F il y a des mitochondries dans les GR ?

A

FAUX

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Où se trouve la matrice mitochondriale ?

A

Dans mb interne (où se trouve la chaine respi)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

taille génome mitochondrial

A

16000 Pb

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

forme génome mitochondrial ?

A

anneau
2 brins (H et L)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Combien de gènes ADN mit ?

A

37 : dont
- 13 protéines pour CRM
- 22 ARN t (transfert)
- 2 ARNr (ribosomaux)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Introns dans ARNmit ?

A

non !

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Combien de molécules d’ADN mit par cellules ?

A

entre 100 et 1000

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Prévalence maladies mitochondriales ?

A

1/5000 !!

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

présentation clinique maladie mitochondriale ?

A

VARIABLE +++
Combinaison inexpliquées, symptômes neuromusculaires ou non
évolution généralement progressive
apparition à tout âge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Investigation métabolique ?

A

biochimie simple : augmentation des lactates

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

investigation enzymologique ?

A

déficit CRM

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

investigation histologique ?

A

fibres rouges déchiquetées

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

définition hétéroplasmie ?

A

coexistence molécules ADN mutées/ ADN non mutées dans même cellule

How well did you know this?
1
Not at all
2
3
4
5
Perfectly