Abstract
Cytokines play an important role in the immune system. Any disorder in the regulation of cytokines can lead to the development of inflammatory diseases. Tumor necrosis factor-α (TNF-α) is one of the most important inflammatory cytokines that controls different types of cell functions. The overproduction of TNF-α is linked with the development of various diseases such as asthma, rheumatoid arthritis, psoriatic arthritis, inflammatory bowel disease, septic shock, diabetes and atherosclerosis. Plants are considered as excellent sources of pharmacologically active compounds. Currently, scientists are searching for natural products with anti-TNF-α properties for the treatment of various inflammatory disorders. At present, protein-based drugs are available for the inhibition of TNF-α, however these have some limitations. Plant might provide an alternative and cost-effective source of drugs that can regulate TNF-α levels. This review briefly highlights the physiological and pathological roles of TNF-α along with a description of plant-derived compounds capable of interfering with TNF-α activity and production.
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Abbreviations
- AKT:
-
A serine/threonine kinase
- AP-1:
-
Activator protein-1
- COX-2:
-
Cycloxygenase 2
- DD:
-
Death domain
- EGB-761:
-
Extract of Ginkgo biloba
- ERK:
-
Extracellular signal-regulated kinases
- ICAM-1:
-
Intercellular adhesion molecule-1
- IGF:
-
Insuline-like growth factor
- IκB:
-
Inhibitor of nuclear factor-kappa B
- INOS:
-
Inducible nitric oxide
- IRA:
-
Insulin receptor activation
- LOX-2:
-
Lipoxygenase-2
- LPS:
-
Lipopolysaccharides
- MAPK:
-
Mitogen activated protein kinase
- MCP-1:
-
Monocyte chemoattractant protein 1
- MEKK1:
-
Mitogen-activated protein kinase kinase 1
- NF-κB:
-
Nuclear factor kappa B
- NIK:
-
Nuclear factor-kB-inducing kinase
- NO:
-
Nitric oxide
- PDE4:
-
Phosphodiesterase 4
- PGE2:
-
Prostaglandin E2
- PK:
-
Protein kinase
- RAW-264.7:
-
Rat leukemia monocyte macrophage cell line
- RBL-2H3:
-
Rat basophilic leukemia mast cell line
- RIP:
-
Receptor activating protein
- TACE:
-
TNF-α converting enzyme
- TNF-α:
-
Tumor necrosis factor alpha
- VCAM-1:
-
Vascular cell adhesion molecule-1
- VEGF:
-
Vascular endothelial growth factor
- ZZ-CWE:
-
Crude water extract of Zingiber zerumbet
- NF-κB:
-
A protein complex which is found in all animal cells and is actively involved in regulating immune response to infection
- T cells:
-
They belong to a group of white blood cells known as lymphocytes, and play a central role in cell mediated immunity
- NK cells:
-
(Natural killer cells), these are lymphocytes and they are considered as a major component of the immune system
- B cells:
-
These are lymphocytes that play a large role in the humoral immune response
- IL-1α and β:
-
These are pro-inflammatory cytokines involved in immune defense against infection
- IC50:
-
Half maximal inhibitory concentration: is a measure of effectiveness of a compound in inhibiting a biological function
- IFN-γ:
-
Interferon-gamma; a soluble cytokine that is important for innate and adaptive immunity against viral and intracellular bacterial infections
- TNF-α:
-
(Tumor necrosis factor alpha) is a pro inflammatory cytokine involved in the process of inflammation. It is produced by several types of cells but especially macrophages
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The authors gratefully acknowledge the Higher Education Commission (HEC) of Pakistan & Smart Mix Programme of the Netherlands Ministry of Economic Affairs and the Netherlands Ministry of Education, Culture and Science for the support of Muzamal Iqbal.
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Iqbal, M., Verpoorte, R., Korthout, H.A.A.J. et al. Phytochemicals as a potential source for TNF-α inhibitors. Phytochem Rev 12, 65–93 (2013). https://doi.org/10.1007/s11101-012-9251-7
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DOI: https://doi.org/10.1007/s11101-012-9251-7