MIRAGE sd Flashcards

1
Q

Signification de l’acronyme SAMD9

A

Sterile Alpha Motif Domain containing protein 9

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2
Q

rôle de SAMD9?

A

contrôle de la prolifération cellulaire (suppreseur)
Inflammation, réponses antivirale

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3
Q

C’est quoi SMAD9L

A

un gène proche de SAMD9 sur le ch 7 qui a des fonctions proches

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4
Q

Cause du Sd MIRAGE

A

mutation SAMD9

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5
Q

Signification de l’acronyme MIRAGE

A

Myélodysplasie (thrombopénie et anémie)
Infections
Retard de croissance
Insuffance surrnéalienne (Adrenal)
malformation génitales
Entéropathies (diarrhées)

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6
Q

MDS de l’enfant: fréquence

A

1-2 cas/millions d’enfant

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7
Q

Causes de SMD de l’enfant

A
  1. dérivent d’insuffisance médullaire
  2. prédisposition génétique
  3. secondaire chimio/irradiation
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8
Q

Anomalies génétiques germinales responsables de SMD de l’enfant?

A

Mutation RUNX1, ETV6, GATA2, SAMD9, SAMD9L

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9
Q

Type de mutation de SMD9

A

gain de fonction ==> suppression de la prolifération

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10
Q

Mode de réversion des mutations SAMD9?

A

maladaptation: perte chromosme 7
bonne adaptation: Mutation SAD9/SAMD9L additionnelle (LoF) ou duplication du chromosome parentale sain (UPD7q)

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11
Q

Traitement SAMD9

A

Allogreffe
guérison spontanée

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