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Deleterious and Oncogenic Mutations in the IL7RA.


ABSTRACT: Interleukin 7 (IL-7) is a critical cytokine that plays a fundamental role in B- and T-cell development and in acute lymphoblastic leukemia (ALL). Its receptor (IL7R) is a transmembrane heterodimer formed by the IL7R? and the IL2R? chain (?c). The IL7R signals through the JAK/STAT pathway. Loss-of-function mutations and some polymorphisms of the IL7R? were associated to immunodeficiency and inflammatory diseases, respectively. Gain-of-function mutations were described in T-cell ALL and in high risk precursor B-cell ALL. Most confirmed loss-of-function mutations occur in the extracellular part of the IL7R? while oncogenic mutations are exclusively found in the extracellular juxtamembrane (EJM) or transmembrane regions. Oncogenic mutations promote either IL7R?/IL7R? homodimerization and constitutive signaling, or increased affinity to ?c or IL-7. This work presents a review on IL7R? polymorphisms/mutations and attempts to present a classification based on their structural consequences and resulting biological activity.

SUBMITTER: Campos LW 

PROVIDER: S-EPMC6966522 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature

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Deleterious and Oncogenic Mutations in the <i>IL7RA</i>.

Campos Lívia Weijenborg LW   Pissinato Leonardo Granato LG   Yunes José Andrés JA  

Cancers 20191205 12


Interleukin 7 (IL-7) is a critical cytokine that plays a fundamental role in B- and T-cell development and in acute lymphoblastic leukemia (ALL). Its receptor (IL7R) is a transmembrane heterodimer formed by the IL7Rα and the IL2Rγ chain (γc). The IL7R signals through the JAK/STAT pathway. Loss-of-function mutations and some polymorphisms of the IL7Rα were associated to immunodeficiency and inflammatory diseases, respectively. Gain-of-function mutations were described in T-cell ALL and in high ri  ...[more]

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