Related Experiment Video
Updated: Jul 10, 2026
10:00
High-throughput Quantitative Real-time RT-PCR Assay for Determining Expression Profiles of Types I and III Interferon Subtypes
Published on: March 24, 2015
Cell type-specific signaling in response to interferon-gamma
A H H van Boxel-Dezaire1, G R Stark
1Department of Molecular Genetics, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, OH 44195, USA.
Current Topics in Microbiology and Immunology
|November 1, 2007
Summary
Type II interferon-gamma (IFN-gamma) signaling is complex, involving more than just JAKs and STATs. This complexity allows for diverse, cell-specific biological functions through varied signaling pathways.
Area of Science:
- Immunology
- Cellular Biology
- Molecular Signaling
Background:
- Type II interferon-gamma (IFN-gamma) is a key cytokine regulating cellular functions.
- IFN-gamma primarily signals through Janus kinase (JAK) and signal transducer and activator of transcription (STAT) pathways.
- Gene expression is induced via sequential phosphorylation of JAK and STAT proteins.
Purpose of the Study:
- To explore the complexity of IFN-gamma signaling beyond the canonical JAK-STAT pathway.
- To understand how diverse cellular responses are mediated by IFN-gamma.
- To investigate cell type-specific regulation of biological functions by IFN-gamma.
Main Methods:
- Analysis of kinase activation beyond JAKs.
- Examination of differential STAT1, STAT3, and STAT5 activation patterns.
- Identification of non-STAT transcription factors involved in IFN-gamma response.
Main Results:
- IFN-gamma signaling involves kinases other than JAKs.
- Distinct STAT activation profiles (STAT1, STAT3, STAT5) observed across different cell types.
- Activation of transcription factors beyond the STAT family contributes to IFN-gamma responses.
Conclusions:
- IFN-gamma signaling is more complex than previously understood.
- Cell-specific signaling pathways and transcription factor activation dictate diverse biological outcomes.
- This complexity enables fine-tuned regulation of cellular functions by IFN-gamma.
Related Concept Videos
01:16TGF - β Signaling Pathway
The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors are of three kinds RI, RII, and RIII. The RI...
01:20The JAK-STAT Signaling Pathway
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...
01:22Diversity in Cell Signaling Responses
The physiological function of a cell and cellular communication are outcomes of a range of extrinsic signals, intracellular signaling pathways, and cellular responses. No two cell types express the same repertoire of signaling components. Receptors are highly selective for their cognate ligands, but once activated, they can alter multiple cellular processes such as DNA transcription, protein synthesis, and metabolic activity.
Graded and Abrupt Responses
Some signaling systems generate...
Graded and Abrupt Responses
Some signaling systems generate...
02:26NF-κB-dependent Signaling Pathway
The transcription factor NF-κB was discovered in 1986 in the lab of Nobel laureate Professor David Baltimore, for its interaction with the immunoglobulin light chain enhancer in B-cells. After more than three decades of study, it is now evident that NF-κB regulates the expression of over 100 genes. Most of these genes play an essential role in the innate and adaptive immune responses as well as the inflammatory responses of animals.
NF-κB-dependent Signaling Mechanism
The heterodimer of NF-κB...
NF-κB-dependent Signaling Mechanism
The heterodimer of NF-κB...
01:30Inhibitors of Viral Protein Synthesis
Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...
01:29Immune Response Against Viral Pathogens
The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...