[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fxLN3MUwXCdr5RPjwZYIDpOj8CHyjOmngWTgoKXPtZbg":3,"$fgwJSV0Sx2PrU40gIzxVsgrQ72A6p7reFF9wSOlM_l_A":32,"$f3Ft0rKFJHppdzE-vuveecxx1BUcg9iOlMLtyzf_MJDg":47},[4,8,12,16,20,24,28],{"title":5,"slug":6,"path":7},"About Microbeonline.com","about-microbeonline-com","\u002Fabout-microbeonline-com\u002F",{"title":9,"slug":10,"path":11},"About Me","about-me","\u002Fabout-microbeonline-com\u002Fabout-me\u002F",{"title":13,"slug":14,"path":15},"Advertise with Us","advertise-us","\u002Fadvertise-us\u002F",{"title":17,"slug":18,"path":19},"Privacy Policy","privacy-policy","\u002Fprivacy-policy\u002F",{"title":21,"slug":22,"path":23},"Abbreviations","abbreviations","\u002Fabbreviations\u002F",{"title":25,"slug":26,"path":27},"Microbes","microbes","\u002Fmicrobes\u002F",{"title":29,"slug":30,"path":31},"Books","recommended-books","\u002Frecommended-books\u002F",{"type":33,"data":34},"blog",{"slug":35,"title":36,"description":36,"seoTitle":37,"seoDescription":37,"author":38,"createdDate":39,"lastUpdatedDate":40,"draft":41,"category":42,"image":37,"body":43,"faq":44,"tags":45,"related":46},"short-note-cytokines","Cytokines: Types and Functions",null,"Acharya Tankeshwar","2010-04-20","2025-12-29",false,"immunology","Cytokines are bioactive hormones, normally glycoproteins, which exercise a wide variety of biological effects on those cells which express the appropriate receptors. Cytokines are designated by their cellular origin such that\n\n- **Monokines** include those interleukins produced by macrophages\u002F monocytes,\n- **Lymphokines** include those interleukins produced by lymphocytes.\n- **Interleukins** is used for cytokines which mostly influence cellular interactions.\n\nAll cytokines are cyto-regulatory proteins with molecular weights under 60 kDa (in most cases under 25 kDa). They are produced locally, have very short half-lives (a matter of seconds to minutes), and are effective at picomolar concentrations. The effects of cytokines may be:\n\n- paracrine (acting on cells near the production locus), or\n- autocrine (the same cell both produces, and reacts to, the cytokine).\n\nBy way of interaction with highly specific cell surface receptors, cytokines can induce cell-specific or more general effects (including mediator release, expression of differentiation molecules and regulation of cell surface molecule expression). The functions of cytokines are usually pleiotropic, in that they display a number of effects of the same, or of a different, nature on one or more cell types.\n\n![Release of cytokines - Cytokine Release](https:\u002F\u002Fassets.microbeonline.com\u002Fblogs\u002FCytokine-release.jpg)\n\u003Cfigcaption>Figure: Cytokine Release\u003C\u002Ffigcaption>\n\n## Types of Cytokines\n\nCytokines coordinate and regulate various physiological responses, including inflammation, immune responses, and hematopoiesis (the formation of blood cells). Here are some common types of cytokines:\n\n### Interleukins (IL)\n\nInterleukins are a large group of cytokines that act as signaling molecules between leukocytes (white blood cells). They play critical roles in regulating immune responses, inflammation, and communication between different immune cells. Examples include IL-1, IL-2, IL-6, and IL-12.\n\n### Tumor Necrosis Factors (TNF)\n\nTumor Necrosis Factors are cytokines that aids in regulating immune cells and inflammation. TNF-alpha and TNF-beta are examples of cytokines within this family. TNF-alpha, in particular, plays a central role in the inflammatory response.\n\n### Interferons (IFN)\n\nInterferons are useful in antiviral defense and modulating immune responses. They can be further categorized into Type I (IFN-alpha and IFN-beta) and Type II (IFN-gamma). The production of Type I interferons is a response to viral infections, while IFN-gamma production involves in immune regulation.\n\n### Chemokines\n\nChemokines are cytokines that attract immune cells to specific sites in the body. They have a crucial role in cell migration and positioning during immune responses. Examples include CCL (C-C motif ligand) and CXCL (C-X-C motif ligand) chemokines.\n\n### Transforming Growth Factors (TGF)\n\nTransforming Growth Factors involve various cellular processes, including cell growth, differentiation, and immune regulation. TGF-beta is a well-known cytokine in this family with immunosuppressive properties.\n\n### Colony-stimulating factors (CSF)\n\nColony-stimulating factors (CSFs) regulate the production and differentiation of white blood cells (WBCs) in the bone marrow and have a crucial role in hematopoiesis. Examples include granulocyte-colony stimulating factor (G-CSF) and macrophage-colony stimulating factor (M-CSF).\n\n### Interleukin-1 Family\n\nIL-1 family cytokines include IL-1 alpha, IL-1 beta, and IL-18. They are involved in inflammatory responses and immune regulation. IL-1, in particular, plays a central role in initiating inflammation.\n\n### Interleukin-17 Family\n\nIL-17 family cytokines, including IL-17A and IL-17F, are associated with inflammatory and autoimmune responses. They help recruit immune cells and induce pro-inflammatory mediators.\n\n### Interleukin-10 (IL-10)\n\nIL-10 is an anti-inflammatory cytokine that suppresses immune responses. It aids in regulating the balance between pro-inflammatory and anti-inflammatory signals.\n\n### IL-12 Family\n\nIL-12 and IL-23 are members of the IL-12 family and play essential roles in immune responses. They differentiate [T cells](\u002Factivation-of-t-lymphocytes\u002F) and activate natural killer (NK) cells.\n\nThese are just a few examples of the diverse range of cytokines, and many more have been identified, each with specific functions in regulating immune responses and maintaining homeostasis in the body. The balance and coordination of cytokine signaling are critical for a properly functioning immune system. Dysregulation of cytokine production and signaling can contribute to various diseases, including autoimmune disorders and chronic inflammatory conditions.\n\n## Function of Cytokines\n\nBelow is a summary of cytokine functions:\n\n- Promotion of inflammation: IL-1, IL-6, TNFα, chemokines (e.g., IL-8).\n- Inhibition of inflammation: IL-10, TGFß.\n- Promotion of hematopoiesis: GM-CSF, IL-3, G-CSF, M-CSF, IL-5, IL-7.\n- Activating B cells: CD40L, IL-6, IL-3, IL-4.\n- Activating T cells: IL-2, IL-4, IL-10, IL-13, IL-15.\n- Anti-infectious: IFNα, IFNß, IFNγ, TNFα.\n- Anti-proliferative: IFNα, IFNß, TNFα, TGFß.\n\n**References**\n\n1. Levinson. (2010). [Review of Medical Microbiology and Immunology](https:\u002F\u002Fwww.amazon.com\u002FReview-Medical-Microbiology-Immunology-Lange\u002Fdp\u002F0071818111). McGraw-Hill.\n2. Zhang, J. M., & An, J. (2007). Cytokines, inflammation, and pain. *International anesthesiology clinics*, *45*(2), 27–37. [https:\u002F\u002Fdoi.org\u002F10.1097\u002FAIA.0b013e318034194e](https:\u002F\u002Fdoi.org\u002F10.1097\u002FAIA.0b013e318034194e)",[],[],[],[48,54,61,66,70,74,79,84,88,92],{"slug":49,"name":38,"description":50,"image":51,"body":52,"postCount":53},"acharya-tankeshwar","Editor-in-chief","https:\u002F\u002Fassets.microbeonline.com\u002Fauthors\u002Ftankeshwar-acharya-author-microbeonline.jpg","***Tankeshwar Acharya, MSc (Medical Microbiology)***\n\n*Tankeshwar Acharya is an Assistant Professor in the Department of Microbiology at Patan Academy of Health Sciences (PAHS), Nepal, where he has been teaching and practicing clinical microbiology for over 14 years. He is the founder of Microbe Online, one of the leading free microbiology education resources on the web, covering bacteriology, mycology, parasitology, immunology, and clinical laboratory diagnostics written from direct experience in both the classroom and the diagnostic laboratory.*",432,{"slug":55,"name":56,"description":57,"image":58,"body":59,"postCount":60},"ashma-shrestha","Ashma Shrestha","SEO Copywriter and Science Communicator\nKathmandu, Nepal","https:\u002F\u002Fassets.microbeonline.com\u002Fauthors\u002Fashma-shrestha.png","Ashma Shrestha holds a Master of Science in Medical Microbiology from the Institute of Science and Technology (IOST), Tribhuvan University, Nepal, where she developed a strong foundation in virology, molecular biology, and diagnostic microbiology.\n\nShe now works as an SEO Copywriter at Resolution Digital, where she combines her scientific training with research-driven content strategy. She is certified in Google Analytics and Google Business Profile (GBP), and brings a data-informed approach to science communication writing content that is not only accurate but structured to reach and serve the students who need it most.\n\nAt microbeonline, Ashma contributes articles primarily in virology and molecular biology, areas she finds most compelling for their mechanistic depth and their growing clinical relevance. Her writing reflects the same standard the site is built on: factual rigor, clear explanation of the *why* behind microbiology concepts, and content that helps students move from memorization to genuine understanding.\n\nShe is passionate about making complex microbiological concepts accessible without sacrificing accuracy; a skill that sits at the intersection of her scientific training and her professional work in content and SEO.",81,{"slug":62,"name":63,"description":64,"image":37,"body":37,"postCount":65},"sushmita-baniya","Sushmita Baniya","Author \u002F Contributor",32,{"slug":67,"name":68,"description":64,"image":37,"body":37,"postCount":69},"samikshya-acharya","Samikshya Acharya",20,{"slug":71,"name":72,"description":64,"image":37,"body":37,"postCount":73},"alisha-tripathi","Alisha Tripathi",6,{"slug":75,"name":76,"description":77,"image":37,"body":37,"postCount":78},"aastha-shrestha","Aastha Shrestha"," Author \u002F Contributor",10,{"slug":80,"name":81,"description":82,"image":37,"body":37,"postCount":83},"guest-author","Guest Author","Guest Author \u002F Contributor",2,{"slug":85,"name":86,"description":64,"image":37,"body":37,"postCount":87},"srijana-khanal","Srijana Khanal",18,{"slug":89,"name":90,"description":82,"image":37,"body":37,"postCount":91},"dr-poonam-acharya","Dr. Poonam Acharya",1,{"slug":93,"name":94,"description":64,"image":37,"body":95,"postCount":96},"nisha-rijal","Nisha Rijal","**Nisha Rijal** is a microbiologist and quality assurance specialist. She served for nearly 12 years as a microbiologist at the National Public Health Laboratory (NPHL), Nepal's national reference laboratory, and continues to work as a consultant microbiologist in international public health organization. ",51]