Pain & Inflammation

Nociception (pain perception) and inflammation are two responses of an organisms defence system towards external noxious stimuli. Although different in nature, pain and inflammation are strongly associated with each other. An important sign of inflammation - besides local redness, swelling, heat, and loss of function -  is in fact pain. The events of inflammation that underlie these symptoms are induced and regulated by a large number of chemical mediators that are also found to mediate the mechanisms of pain perception. These mediators include eicosanoids, kinins, complement proteins, neurotransmitters (e.g. histamine), protons, NO, prostaglandins, leukotrienes, neurotrophins, and monokines[1].
Inflammation is a major protective response of the immune system to tissue damage and infection, and ranges from the acute inflammation associated with infection of the skin, through to chronic inflammatory processes in atherosclerosis, asthma and chronic bronchitis, and rheumatoid arthritis, among many others. Acute inflammation is knows for its rapid onset and short duration. It is mediated by tissue-resident macrophages and mast cells, and characterized by the exudation of fluids and plasma proteins, and the migration of leukocytes (mainly neutrophils) into the injured area. In contrast, chronic inflammation is of a more prolonged duration and manifests histologically by the presence of lymphocytes and macrophages, resulting in fibrosis and tissue necrosis[2].
Similar to Inflammation, pain may also be divided into two main categories: acute and chronic pain. Acute or nociceptive pain is part of a rapid warning relay instructing the motor neurons of the central nervous system to minimize detected physical harm. It is mediated by nocicepters: free nerve endings that terminate just below the skin, in tendons, joints, and in body organs.  Nociceptors are extremely heterogeneous, differing in the neurotransmitters they contain, the receptors and ion channels they express, their speed of conduction, their response properties to noxious stimuli, and their capacity to be sensitized during inflammation, injury, and disease. Nociception can be associated with nerve damage caused by trauma, diseases such as diabetes, shingles, irritable bowel syndrome, late-stage cancer or the toxic effects of chemotherapy. It typically responds well to treatment with opioids and NSAIDs. Chronic pain, however, serves no biologic function as it is not a symptom of a disease process but is a disease process itself[3],[4].


[1] R. Medzhitov. Origin and physiological roles of inflammation. Nature 2008, 454, 428-435.
[2] E.O. Iwalewa et al. Inflammation: the foundation of diseases and disorders. A review of phytomedicines of South African origin used to treat pain and inflammatory conditions. Afr. J. Biotech. 2007, 6, 2868-2885.
[3] M. Percival. Understanding The Natural Management of Pain and Inflammation. Clin. Nutr. Insights 1999, 4, 1-5.
[4] C.L. Stucky et al. Mechanisms of pain. PNAS October 9, 2001, 98, 11845-11846.

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Axon ID Name Description From price
5053 Axon Ligands™ Stem cell compound library Axon Ligands™ Stem cell compound library Inquire
1747 AZ 12216052 Positive allosteric modulator (PAM) of mGluR8 €105.00
2669 AZ13705339 Potent and selective PAK1 inhibitor €125.00
2171 AZD 1080 Selective inhibitor of GSK-3α and GSK-3β €110.00
2145 AZD 1981 Selective CRTH2 (aka DP2) antagonist €105.00
2842 AZD 2098 Potent, selective and bioavailable CCR4 receptor antagonist €125.00
2194 AZD 2858 hydrochloride Potent and highly selective Glycogen Synthase Kinase-3β inhibitor €95.00
2255 AZD 8797 Potent and selective antagonist of the Fractalkine receptor (FKN or CX3CR1) €120.00
2661 AZD2716 Potent secreted phospholipase A2 (sPLA2) inhibitor €145.00
1154 B-HT 933 dihydrochloride α2 adrenoceptor agonist €115.00
1784 BAN ORL 24 dihydrochloride NOP receptor antagonist €99.00
1955 Baricitinib Inhibitor of JAK1 and JAK2 €90.00
2132 BAY 11-7082 IKK inhibitor and anti-inflammatory €85.00
1178 BAY 19-8004 PDE4 inhibitor €135.00
1697 BAY K 8644 Calcium (Ca2+) channel activator (L-type voltage-gated) €95.00

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