Cytokine
Cytokine — A broad category of small signaling proteins secreted by cells that modulate immune responses, inflammation, and cell communication.
What Is a Cytokine?
Cytokines are small signaling peptides and proteins (5-20 kDa) secreted by immune cells to regulate inflammation, immune cell activation, proliferation, and differentiation. They are the downstream effectors measured in peptide immunomodulation studies, including work with Thymosin Alpha-1, LL-37, and KPV.
Key Cytokine Categories
- Pro-inflammatory: TNF-alpha, IL-1beta, IL-6, IFN-gamma. Elevated in inflammation; targets of anti-inflammatory peptide research
- Anti-inflammatory: IL-10, TGF-beta, IL-4. Upregulated by immunomodulatory peptides
- Chemokines: IL-8, MCP-1, RANTES. Direct immune cell migration. Some are peptide-sized (8-12 kDa)
Measurement
Cytokines measured by ELISA, multiplex bead arrays (Luminex), or intracellular cytokine staining with flow cytometry. Changes in cytokine profiles are the primary readout for peptide immunomodulation in vitro studies.
Frequently Asked Questions
What is Cytokine?
A broad category of small signaling proteins secreted by cells that modulate immune responses, inflammation, and cell communication.
Why is Cytokine important in peptide research?
Cytokine is a fundamental concept in biology as it relates to peptide science. It directly influences experimental design, compound characterization, and the reliability of research outcomes across biochemistry and molecular biology disciplines.