STAT6

Table of Contents

Overview

The STAT6 gene, which encodes a transcription factor involved in the JAK-STAT signaling pathway, plays a significant role in the pathogenesis of various lymphomas, including diffuse large B-cell lymphoma (DLBCL). Below is a summary of the common mutations in the STAT6 gene identified in DLBCL. Mutations in the DNA binding domain of STAT6 are common in PMBCL and more rare in DLBCL.

Relevance tier by entity

Entity	Tier	Description
	1	high-confidence MZL gene
	1	high-confidence PMBL/cHL/GZL gene¹
	1	high-confidence DLBCL gene²
	1	high-confidence FL gene²

Mutation incidence in large patient cohorts (GAMBL reanalysis)

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Mutation pattern and selective pressure estimates

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STAT6 Hotspots

Recurrent mutations at the D419 amino acid residue are a common feature in DLBCL, specifically affecting the germinal center B (GCB) cell subtype. These mutations lead to the activation of the JAK/STAT signaling pathway, contributing to lymphomagenesis³.

Chromosome	Coordinate (hg19)	ref>alt	HGVSp
chr12	57496671	C>G	G416R
chr12	57496666	G>T	N417K
chr12	57496662	C>T	D419N
chr12	57496662	C>G	D419H
chr12	57496662	C>A	D419Y
chr12	57496661	T>G	D419A
chr12	57496661	T>C	D419G
chr12	57496661	T>A	D419V
chr12	57496658	T>G	N420T
chr12	57496658	T>C	N420S
chr12	57496656	T>C	N421D
chr12	57496654	A>C	N421K

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Expression

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References

Ritz O, Guiter C, Castellano F, Dorsch K, Melzner J, Jais JP, Dubois G, Gaulard P, Möller P, Leroy K. Recurrent mutations of the STAT6 DNA binding domain in primary mediastinal B-cell lymphoma. Blood. 2009 Aug 6;114(6):1236–1242. PMCID: PMC2824656

Yildiz M, Li H, Bernard D, Amin NA, Ouillette P, Jones S, Saiya-Cork K, Parkin B, Jacobi K, Shedden K, Wang S, Chang AE, Kaminski MS, Malek SN. Activating STAT6 mutations in follicular lymphoma. Blood. 2015 Jan 22;125(4):668–679. PMCID: PMC4729538

Morin RD, Assouline S, Alcaide M, Mohajeri A, Johnston RL, Chong L, Grewal J, Yu S, Fornika D, Bushell K, Nielsen TH, Petrogiannis-Haliotis T, Crump M, Tosikyan A, Grande BM, MacDonald D, Rousseau C, Bayat M, Sesques P, Froment R, Albuquerque M, Monczak Y, Oros KK, Greenwood C, Riazalhosseini Y, Arseneault M, Camlioglu E, Constantin A, Pan-Hammarstrom Q, Peng R, Mann KK, Johnson NA. Genetic Landscapes of Relapsed and Refractory Diffuse Large B-Cell Lymphomas. Clin Cancer Res. 2016 May 1;22(9):2290–2300.