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The JAK-STAT Signaling Pathway

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Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as SH2...

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Describing a Transcription Factor Dependent Regulation of the MicroRNA Transcriptome

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STAT transcript levels in childhood acute lymphoblastic leukemia: STAT1 and STAT3 transcript correlations.

Maria Adamaki¹, Maria Tsotra¹, Spiros Vlahopoulos¹

¹Pediatric Hematology/Oncology Unit, First Department of Pediatrics, University of Athens Medical School, "Aghia Sofia" Children's Hospital, 11527 Athens, Greece.

Leukemia Research

|September 20, 2015

Summary

Childhood acute lymphoblastic leukemia (ALL) patients show decreased STAT gene expression. Lower STAT1 and STAT3 transcript levels correlate with better survival outcomes in ALL, offering insights for targeted therapies.

Keywords:

Precursor cell lymphoblastic leukemia–lymphoma STAT1 transcription factor STAT3 transcription factor STAT5 transcription factor

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Area of Science:

Molecular Biology
Oncology
Genetics

Background:

Childhood acute lymphoblastic leukemia (ALL) is a significant health concern.
Signal transducer and activator of transcription (STAT) genes play crucial roles in cellular processes.
Aberrant STAT gene expression is implicated in various cancers.

Purpose of the Study:

To investigate STAT1, STAT3, STAT5A, and STAT5B transcript levels in childhood ALL.
To compare STAT gene expression between ALL patients and healthy controls.
To explore the correlation between STAT gene expression and patient survival.

Main Methods:

Transcript level analysis of STAT1, STAT3, STAT5A, and STAT5B.
Comparison of gene expression in diagnostic samples from childhood ALL patients and healthy controls.
Statistical analysis to determine correlations and significance.

Main Results:

ALL patients exhibited significantly decreased transcript levels for all four STAT genes compared to controls.
STAT1 and STAT3 transcript levels were significantly correlated in ALL patients.
Lower transcript levels of STAT1 and STAT3 were associated with improved survival outcomes, irrespective of minimal residual disease or relapse.

Conclusions:

Aberrant STAT gene expression is a characteristic of childhood ALL.
STAT gene dysregulation may contribute to ALL development.
STAT gene expression profiles can inform patient-tailored therapeutic strategies for resistant ALL cases.