Analogue pyrophosphate Flashcards

1
Q

MA

A

Analogue inorganique du pyrophosphate.

Pas de métabolisme intracellulaire.

Inhibition directe non-compétitive de la polymérase virale.

Empêche le clivage du pyrophosphate du désoxyribonucléoside triphosphate.

Bloque l’élongation de la chaîne ADN naissante.

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2
Q

Foscavir

Spectre

A

VHS, VZV, EBV, HHV-8, CMV.

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3
Q

Foscavir

Forme

A

IV.

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4
Q

Foscavir

Efficace en cas de

A

Échec au Tx sec à mutation dans le gène de la TK virale ou équivalent UL97.

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5
Q

Foscavir

Haute dose supra-thérapeutique fait quoi

A

Inhibe la synthèse de l’ADN cellulaire.

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6
Q

Foscavir

Distribution

A

Os et LCR.

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7
Q

Foscavir

Métabolisme

A

Aucun.

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8
Q

Foscavir

Élimination

A

Rénale 80% inchangée.

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9
Q

Foscavir

G/A

A

NON.

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10
Q

Foscavir

EI

A
Néphrotoxicité par protéinurie et nécrose tubulaire aiguë. Réversible en 4 semaines.
Chélation d’ions divalents.
Hypo-Ca, Hypo-Mg, Hypo-K, Hypo-P.
Anémie chez VIH
Leucopénie rare
Céphalées, convulsions, neuropathie, paresthésie, tremblement, hallucination.
Ulcération génitale douloureuse
Diarrhée
Bloc cardiaque et changement ECG
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11
Q

Foscavir

Interactions

A

Agents qui allongent le QT, cipro, zalcitabine, cyclosporine, ampho-B, aminoside, pentamidine, tacrolimus.

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