transporteurs ioniques Flashcards

1
Q

transporteurs et co-transporteurs

A

NCX : Na/Ca
NHE :Na/H
NKCC : Na/K/Cl
KCC : K/Cl
NCC : Na/Cl

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2
Q

NCX : Na/Ca structure

A

1SU avec + de 10 segments transmbr
transport électrogène
3 isoformes :
NCX1 :ubiquitaire
NCX 2 et 3 : c excitable

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3
Q

fonction NCX : Na/Ca

A

regulation concentration intrac Ca qui doit être bas au repos
agit en synergie avec ATPase calcique et Na/K/ATPase

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4
Q

pharmaco NCX : Na/Ca

A

régulation en fonction taux de Ca et réaction phosphorylation

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5
Q

structure NHE

A

1SU avec + de 10 domaines transmbr
N-term court et C-term long intrac
transporteur électroneutre
6 isoformes :
5 membranaires
1 mitochondrie

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6
Q

localisation NHE

A

NHE1 : ubiquitaire
NHE2 à 5 : rein et intestin
NHE6 : mitochondrie

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7
Q

pharmaco NHE

A

inhibition NHE1 et 2 -> amiodarone

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8
Q

structure NKCC

A

1SU + 10 segments transmbr
N et C-term intrac
site glycosylation extrac
transport electroneutre
2 isoformes :
NKCC1 : ubiquitaire
NKCC2 : BAAH

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9
Q

fonction NKCC

A

NKCC2 : réabsorption eau et Na

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10
Q

pharmaco NKCC

A

diurétique anse :
furosemide
bumétanide
pirétanide

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11
Q

structure NCC et KCC

A

1grosse SU + 10 domaines transmbr
N et C-term intrac
transporteur électroneutre
KCC 4 isoformes

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12
Q

localisation KCC

A

KCC : TCD du rein
KCC2 : neurones

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13
Q

fonction NCC et KCC

A

NCC : réabsorption Na et Ca
KCC : volume c

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14
Q

pharmaco NCC et KCC

A

NCC : diurétiques thiazidiques -> bendrofluméthiazide

KCC : diurétiques de l’anse -> furosémide»bumétanide

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