Cytokines may be peptides or glycoproteins involved in cell signalling secreted by specific immune cells. Cytokines regulate inflammation, trauma, sepsis and infections. Cytokines play a major role in immune response.Cytokines are small proteins that are important for cell signaling. They affect the activity of other cells. They also help in autocrine signaling. Cytokines are produced from immune cells like macrophages, B-lymphocytes, T lymphocytes and mast cells.Cytokines are small secreted proteins released by cells have a specific effect on the interactions and communications between cells. Cytokine is a general name; other names include lymphokine, monokine, chemokine and interleukin.