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Updated: Aug 5, 2026

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Assessing Cellular Target Engagement by SHP2 (PTPN11) Phosphatase Inhibitors

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The dual specificity phosphatase 2 act as distal regulatory node in T cell signaling

Henrike Bruckmueller1,2, Anangi Balasiddaiah2, Sofia Malek1

  • 1Institute of Experimental and Clinical Pharmacology, University Hospital Schleswig-Holstein, 24105 Kiel, Germany.

Iscience
|July 28, 2026
PubMed

Insights

Dual-specificity phosphatase 2 (DUSP2) is a key regulator of mitogen-activated protein kinase (MAPK) signaling in human T cells. The ERK1/2-EGR1-DUSP2 pathway fine-tunes T cell activation and IL-2 production.

Area of Science:

  • Immunology
  • Molecular Biology
  • Cell Signaling

Background:

  • Mitogen-activated protein kinases (MAPKs) are crucial for T cell functions.
  • The negative regulatory roles of phosphatases in MAPK signaling are not fully understood.

Purpose of the Study:

  • To comprehensively investigate phosphatases regulating MAPK pathway activity in human T cells.
  • To elucidate the role of DUSP2 in T cell signaling.

Main Methods:

  • Investigated MAPK pathway regulation in human T cells.
  • Assessed the role of DUSP2 and DUSP5 phosphatases.
  • Analyzed the ERK1/2-EGR1-DUSP axis and IL-2 production.

Main Results:

  • DUSP2 identified as a key negative regulator of ERK1/2, p38, and JNK1/2 in human T cells.
  • DUSP5 expression, induced by EGR1, compensates for DUSP2 loss, creating a negative feedback loop.
  • The ERK1/2-EGR1-DUSP axis modulates T cell IL-2 production.

Conclusions:

  • DUSP2 is a critical negative regulator of MAPK signaling in human T cells.
  • A negative feedback loop involving ERK1/2, EGR1, and DUSP5 fine-tunes MAPK activity.
  • The ERK1/2-EGR1-DUSP2 axis plays a vital role in regulating T cell activation and cytokine production.
Keywords:
DUSP2DUSP5IL2 productionMAPKT cellsdual specificity phosphatasesmitogen-activated protein kinases

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