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The plant-derived polyphenol curcumin has been used in promoting health and combating disease for thousands of years. Its therapeutic effects have been successfully utilized in Ayurvedic and Traditional Chinese Medicine in order to treat inflammatory diseases. Current results from modern biomolecular research reveal the modulatory effects of curcumin on a variety of signal transduction pathways associated with inflammation and cancer. In this context, curcumin’s antioxidant, anti-inflammatory, anti-tumorigenic, and even anti-metastatic activities are discussed. On the cellular level, the reduced activity of several transcription factors (such as NFkB or AP-1) and the suppression of inflammatory cytokines, matrix degrading enzymes, metastasis related genes and even microRNAs are reported. On functional levels, these molecular effects translate into reduced proliferative, invasive, and metastatic capacity, as well as induced tumor cell apoptosis. All these effects have been observed not only in vitro but also in animal models. In combination with anti-neoplastic drugs like Taxol, kinase inhibitors, and radiation therapy, curcumin potentiates the drugs’ therapeutic power and can protect against undesired side effects. Natural plant-derived compounds like curcumin have one significant advantage: They do not usually cause side effects. This feature qualifies curcumin for primary prevention in healthy persons with a predisposition to cancer, arteriosclerosis, or chronic inflammatory diseases. Nonetheless, curcumin is considered safe, although potential toxic effects stemming from high dosages, long-term intake, and pharmacological interactions with other compounds have yet to be assessed. This Special Issue examines in detail and updates current research on the molecular targets, protective effects, and modes of action of natural plant-derived compounds and their roles in the prevention and treatment of human diseases.

minerals --- cancer treatment --- chitosan --- n/a --- neurodegeneration --- antioxidant activity --- senescence --- tumor proliferation --- nanoparticles --- antimicrobial agents --- oxidative metabolites --- drug discovery --- Akt/mTOR signaling --- micronutrients --- ulcerative colitis --- transmission electron microscopy --- metabolic reprogramming --- curcumin --- death receptor --- chaperone-mediated autophagy --- wound healing --- brain ischemia --- autophagy --- Alzheimer’s disease --- genes --- transthyretin --- inflammatory bowel disease --- cellular pathway --- centrifugal partition chromatography --- nutrition --- amyloid --- Curcuma longa --- protein aggregation --- supportive care --- IL-17 --- senolytics --- complementary medicine --- macronutrients --- structure activity relationship --- gastroprotection --- Zingiberaceae --- anti-inflamation --- TLC bioautography --- microbiota --- glioblastoma multiforme --- amyloidosis --- SHMT2 --- antioxidants --- silica --- apoptosis --- reflux esophagitis --- gastric ulcer --- TLC-MS --- anti-cancer --- anticancer --- ImageJ --- anti-tumor --- delivery system --- wound --- Helicobacter pylori --- direct protein binding --- protein misfolding --- tumor growth --- diet --- Crohn’s disease --- hydrostatic counter-current chromatography --- ageing --- renal cell cancer --- gastric cancer --- amino-acids --- STAT3 --- mechanism of action --- inflamm-aging --- mitophagy --- necrotizing enterocolitis --- cell cycling --- vitamins --- turmeric tuber --- cancer --- tau protein --- Alzheimer's disease --- Crohn's disease