Related Experiment Video
Updated: Jul 20, 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
Complex modulation of cell type-specific signaling in response to type I interferons
Anette H H van Boxel-Dezaire1, M R Sandhya Rani, George R Stark
1Department of Molecular Genetics, Lerner Research Institute, The Cleveland Clinic Foundation, Cleveland, Ohio 44195, USA.
Immunity
|September 19, 2006
Summary
Type I interferons (IFNs) are crucial cytokines regulating cellular functions. Their complex signaling pathways, involving Janus kinases (JAKs) and signal transducers and activators of transcription (STATs), allow diverse biological responses in different cells.
Area of Science:
- Immunology
- Cellular Biology
- Molecular Biology
Background:
- Type I interferons (IFNs) are key cytokines with diverse cellular functions.
- Their primary signaling involves the Janus kinase (JAK)-signal transducer and activator of transcription (STAT) pathway.
- This pathway is essential for inducing gene expression.
Purpose of the Study:
- To explore the complexity of type I IFN signaling.
- To understand how different subtypes of type I IFNs elicit varied responses.
- To investigate the activation patterns of STATs and other transcription factors.
Main Methods:
- Analysis of type I IFN subtypes.
- Kinase activity assays.
- Examination of STAT protein phosphorylation.
- Identification of transcription factor activation.
Main Results:
- Type I IFN responses are highly complex and context-dependent.
- Specific IFN subtypes trigger distinct signaling cascades.
- Multiple kinases beyond JAKs are involved in IFN signaling.
- All seven STAT proteins exhibit varied activation patterns across different cell types.
- Transcription factors other than STATs are also activated by type I IFNs.
Conclusions:
- Type I IFNs utilize complex signaling networks to regulate diverse biological functions.
- Cell-specific signaling and gene expression patterns are mediated by intricate IFN pathways.
- Understanding this complexity is crucial for deciphering immune responses and cellular regulation.
Related Concept Videos
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...
01:24T Cell Types and Functions
When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
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...
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...
01:19Interactions Between Signaling Pathways
Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
01:23Overview of Cell Signaling
Despite the protective membrane that separates a cell from the environment, cells need the ability to detect and respond to environmental changes. Additionally, cells often need to communicate with one another. Unicellular and multicellular organisms use a variety of cell signaling mechanisms to communicate with the environment.
Cells respond to many types of information, often through receptor proteins positioned on the membrane. For example, skin cells respond to and transmit touch...
Cells respond to many types of information, often through receptor proteins positioned on the membrane. For example, skin cells respond to and transmit touch...