Intracellular signaling pathways modulated by phenolic compounds: application for new anti-inflammatory drugs
G Costa1, V Francisco, M C Lopes
1Faculdade de Farmácia, Universidade de Coimbra, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal.
Abstract:
Extensive research within the last two decades revealed that most chronic illnesses, including cancer, neurological, autoimmune and cardiovascular diseases are mediated through chronic inflammation. Thus, suppressing chronic inflammation has the potential to delay, prevent, and treat those diseases. However, side effects and high costs of current anti-inflammatory drugs force the development of new drugs. Natural products represent an important source of new bioactive compounds. Among them, phenolic compounds, which are widely distributed in plants, have been described as having many therapeutic effects. Several reviews have addressed the anti-inflammatory activity of phenols, attributing their properties not only to the antioxidant capacity, but also to inflammatory mediators' modulation, namely cytokines and pro-inflammatory proteins, such as inducible nitric oxide synthase and cyclooxygenase-2. Signal transduction pathways precede changes in inflammatory mediators' expression. However, only a restricted number of studies have addressed the effect of phenols on a specific signal transduction pathway. The present review attempts to summarize and highlight a broad range of inflammation-associated signaling pathways modulated by phenols namely: nuclear factor (NF)-κB, activator protein (AP)-1, peroxisome proliferator-activated receptor (PPAR) and nuclear factor erythroid 2-related factor 2 (Nrf2) transcription factors; mitogen-activated protein kinases (MAPKs); protein tyrosine kinases (PTKs); tyrosine phosphatidylinositol 3-kinase (PI3K)/Akt and ubiquitin-proteasome system. As a consequence of phenols effect on signaling pathways, described above, their action on inflammatory mediators' production is mentioned. Finally, it is established that the structure-activity relationships of phenolic compounds are a valuable information source on the development of new anti-inflammatory drugs from natural products.
Insights
Phenolic compounds from natural products show potential as anti-inflammatory agents by modulating key signaling pathways. Their structure-activity relationships offer a promising avenue for developing new, safer anti-inflammatory drugs.
Area of Science:
- Biochemistry
- Pharmacology
- Natural Products Chemistry
Background:
- Chronic inflammation underlies many diseases, including cancer and cardiovascular conditions.
- Current anti-inflammatory drugs have limitations, necessitating novel therapeutic approaches.
- Natural products, particularly phenolic compounds, offer a rich source of anti-inflammatory agents.
Purpose of the Study:
- To review the anti-inflammatory effects of phenolic compounds.
- To summarize the impact of phenols on various inflammation-associated signaling pathways.
- To highlight the role of structure-activity relationships in developing new anti-inflammatory drugs.
Main Methods:
- Literature review focusing on phenolic compounds and inflammation.
- Analysis of studies investigating signaling pathways modulated by phenols.
- Examination of the link between phenolic structure and anti-inflammatory activity.
Main Results:
- Phenols modulate critical signaling pathways like NF-κB, AP-1, PPAR, Nrf2, MAPKs, PTKs, PI3K/Akt, and the ubiquitin-proteasome system.
- These modulations lead to reduced production of inflammatory mediators (cytokines, iNOS, COX-2).
- Structure-activity relationship studies provide insights into designing effective phenolic-based anti-inflammatory drugs.
Conclusions:
- Phenolic compounds are potent modulators of inflammatory signaling pathways.
- Their diverse mechanisms offer a basis for developing novel anti-inflammatory therapeutics.
- Understanding structure-activity relationships is key for optimizing natural product-derived anti-inflammatory drug discovery.
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