Abstract
Arthritic pathologies are a major cause of morbidity within the western world, with rheumatoid arthritis affecting approximately 1% of adults. This review highlights the therapeutic potential of naturally occurring hormones and their peptides, in both arthritic models of disease and patients. The arthritides represent a group of closely related pathologies in which cytokines, joint destruction, and leukocytes play a causal role. Here we discuss the role of naturally occurring pro-opiomelanocortin (POMC)-derived melanocortin peptides (e.g., alpha melanocyte stimulating hormone [alpha-MSH]) and synthetic derivatives in these diseases. Melanocortins exhibit their biological efficacy by modulating proinflammatory cytokines and subsequent leukocyte extravasation. Their biological effects are mediated via seven transmembrane G-protein-coupled receptors, of which five have been cloned, identified, and termed MC1 to MC5. Adrenocorticotrophic hormone represents the parent molecule of the melanocortins; the first 13 amino acids of which (termed alpha-MSH) have been shown to be the most pharmacologically active region of the parent hormone. The melanocortin peptides have been shown to display potent anti-inflammatory effects in both animal models of disease and patients. The potential anti-inflammatory role for endogenous peptides in arthritic pathologies is in its infancy. The ability to inhibit leukocyte migration, release of cytokines, and induction of anti-inflammatory proteins appears to play an important role in affording protection in arthritic injury, and thus may lead to potential therapeutic targets.
| Original language | English |
|---|---|
| Pages (from-to) | 1394-414 |
| Number of pages | 21 |
| Journal | TheScientificWorldJournal |
| Volume | 9 |
| DOIs | |
| Publication status | Published - 16 Dec 2009 |
Keywords
- Animals
- Arthritis/drug therapy
- Arthritis, Gouty/drug therapy
- Arthritis, Rheumatoid/drug therapy
- Humans
- Inflammation/drug therapy
- Melanocortins/therapeutic use
- Osteoarthritis/drug therapy
- Receptors, Melanocortin/drug effects
- Signal Transduction/drug effects
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