Related Experiment Video

Updated: Jul 11, 2026

Initial Evaluation of Antibody-conjugates Modified with Viral-derived Peptides for Increasing Cellular Accumulation and Improving Tumor Targeting
11:58

Initial Evaluation of Antibody-conjugates Modified with Viral-derived Peptides for Increasing Cellular Accumulation and Improving Tumor Targeting

Published on: March 8, 2018

STAT nuclear translocation: potential for pharmacological intervention

Thomas Meyer1, Uwe Vinkemeier

  • 1Philipps-Universität Marburg, Klinik für Kardiologie und Klinik für Psychosomatische Medizin und Psychotherapie, Baldingerstrasse 1, 35033 Marburg, Germany. meyert@med.uni-marburg.de

Expert Opinion on Therapeutic Targets
|October 3, 2007
PubMed

Insights

Signal transducer and activator of transcription (STAT) proteins regulate gene expression. Modulating STAT protein transport between the nucleus and cytoplasm offers a therapeutic strategy for diseases linked to aberrant STAT signaling.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biochemistry

Background:

  • Signal transducer and activator of transcription (STAT) proteins are crucial transcription factors mediating diverse biological processes.
  • STAT protein activation involves tyrosine phosphorylation upon stimulation by cytokines or growth factors, leading to gene regulation.
  • Aberrant STAT signaling is implicated in various diseases, including cancer, immune disorders, and inflammatory conditions.

Purpose of the Study:

  • To review the role of STAT protein nucleocytoplasmic translocation in cellular signaling.
  • To explore the potential of targeting STAT shuttling as a therapeutic strategy for STAT-dysregulated diseases.
  • To discuss the implications of modulating STAT activation and transcriptional activity.

Main Methods:

  • Review of existing literature on STAT protein function, signaling pathways, and intracellular trafficking.
  • Analysis of karyopherin-dependent and -independent translocation mechanisms.
  • Discussion of pharmacological approaches to modulate STAT nucleocytoplasmic transport.

Main Results:

  • STAT proteins shuttle continuously between the nucleus and cytoplasm, a process essential for cytokine-regulated gene activation.
  • STAT proteins possess cytokine-independent gene regulatory functions dependent on their nucleocytoplasmic transfer.
  • Targeting STAT nucleocytoplasmic translocation presents a promising strategy to interfere with dysregulated cytokine signaling.

Conclusions:

  • Modulators of STAT shuttling could offer novel therapeutic interventions for diseases driven by aberrant STAT signaling.
  • Pharmacological targeting of STAT translocation may lead to increased or decreased STAT activation, offering versatile therapeutic potential.
  • Understanding STAT intracellular trafficking is key to developing effective treatments for a range of human diseases.

More Related Videos

Merging Absolute and Relative Quantitative PCR Data to Quantify STAT3 Splice Variant Transcripts11:19

Merging Absolute and Relative Quantitative PCR Data to Quantify STAT3 Splice Variant Transcripts

Published on: October 9, 2016

Related Concept Videos

Regulation of Nuclear Protein Sorting01:45

Regulation of Nuclear Protein Sorting

Nuclear protein sorting regulates nucleus composition and gene expression, crucial for determining the fate of a eukaryotic cell. Hence, the entry and exit of molecules across the nuclear envelope is a tightly controlled process. Nuclear protein sorting can be inhibited by one of the following ways: 1) masking cargo signal sequences, 2) modifying the nuclear receptor's affinity for cargo, 3) controlling the nuclear pore size, 4) retaining the cargo during its transit to the cytosol or the...
Transducer Mechanism: Nuclear Receptors01:31

Transducer Mechanism: Nuclear Receptors

Nuclear receptors, or NRs, are unique transcription factors that regulate gene transcription and affect the cellular pathways involved in reproduction, development, or metabolism. Their ability to be stimulated by small lipophilic ligands and control vital cellular processes makes them ideal drug targets. Nearly 10-15% of currently prescribed drugs target these receptors.
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
Nuclear Localization Signals and Import01:46

Nuclear Localization Signals and Import

Proteins targeted to the nucleus carry short stretches of amino acid sequences called the nuclear localization signal or NLS. Classical nuclear localization signals are of two types: monopartite and bipartite NLS. Monopartite classical NLS (cNLS) consists of a single cluster of 4-8 amino acids. Bipartite cNLS consists of two clusters of  2-3 amino acids and a 9-12 residue long proline-rich linker bridging the two clusters. Signal clusters are rich in positively charged amino acids such as...
Nuclear Protein Sorting01:34

Nuclear Protein Sorting

Nuclear protein sorting is the selective trafficking of histones, polymerases, gene regulatory proteins into the nucleus and exporting RNAs and ribosomes to the cytosol. It is a tightly controlled process that regulates gene expression within a cell.
Proteins targeted to the nucleus carry nuclear localization signals or NLS recognized by import receptors in the cytosol. Similarly, proteins with nuclear export signals are recognized by export receptors. Import and export receptors are...
Signal Transduction: Overview01:26

Signal Transduction: Overview

Cells respond to many types of information, often through receptor proteins positioned on the membrane. They respond to chemical signals, such as hormones, neurotransmitters, and other signaling molecules, initiating a series of molecular reactions to produce an appropriate response. This is called signal transduction. Cells also coordinate different responses elicited by the same signaling molecule via mediators, allowing molecular cross-talk.
Typically, signal transduction involves three...