MPN Word of the Month:
Cytokines
Recently, I heard someone describe cytokines as ingredients that make up a recipe. The recipe is a response to a specific event. Like, when we make chicken soup when someone we love has a cold. Each person with an MPN has their own special ingredients that come together in response to different events that happen inside and outside of the body.
So what are cytokines, really? Cytokines are tiny proteins secreted by cells to communicate with one another. What do they say? Basically, they say to activate (go from doing nothing to doing something), proliferate (make more cells), or differentiate (become more specialized, like becoming an eye cell or a liver cell).
Cytokines can send messages to increase inflammation (pro-inflammatory), or stop inflammation (anti-inflammatory). Inflammatory cytokines play a role in the development and progression of myeloproliferative neoplasms.
Some research suggests that there are certain cytokines commonly associated with MPNs. For example, IL-1β (Interleukin-1beta), TNF-α (Tumor Necrosis Factor-alpha) , IL-6 (Interleukin-6), IL-8 (Interleukin-8), VEGF (Vascular Endothelial Growth Factor), PDGF (Platelet Derived Growth Factor), TGF-β (Transforming Growth Factor-beta), and IFNs (Interferons). These cytokines are expressed in different ways that may contribute to the various MPN subtypes.
For example, a recipe may call for tomatoes, but there are different kinds of tomatoes based on their individual genetic makeup…Roma tomatoes, San Marzano tomatoes, Cherry tomatoes. This recipe (cytokine expression) can be seen in different subtypes. For example, people with polycythemia vera (PV) have been known to have elevated levels of IL-12, IL-4 and GM-CSF when compared to people with essential thrombocythemia (ET). Some cytokines, such as BLC, Eotaxin-2, M-CSF, and TIMP-1, may one day help diagnose and predict the progression of fibrosis in MPN subtypes.
While it is not completely clear how your cytokine “recipe” can be affected by lifestyle, conventional wisdom tells us that healthy lifestyle changes can’t hurt. Reducing additional inflammation that may occur through lifestyle choices could help to support your body in ways that impact your experience of your symptoms at the least. A healthy diet, exercise, and stress reduction have all been associated with lowering inflammation in the body.