Granulocyte Apoptosis and Macrophage Clearance of Apoptotic Cells as Targets for Pharmacological Intervention in Inflammatory Diseases

ISSN: 1875-614X (Online)
ISSN: 1871-5230 (Print)

Volume 16, 3 Issues, 2017

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Anti-Inflammatory & Anti-Allergy Agents in Medicinal Chemistry

Formerly: Current Medicinal Chemistry - Anti-Inflammatory and Anti-Allergy Agents

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Claudiu T. Supuran
Neurofarba Department
University of Florence

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Granulocyte Apoptosis and Macrophage Clearance of Apoptotic Cells as Targets for Pharmacological Intervention in Inflammatory Diseases

Anti-Inflammatory & Anti-Allergy Agents in Medicinal Chemistry, 5(1): 3-12.

Author(s): Nicola A. Riley, Carol Ward, Deborah A. Sawatzky, Tara A. Sheldrake, Ian Dransfield, Christopher Haslett and Adriano G Rossi.

Affiliation: MRC Centre for InflammationResearch, The Queen's Medical Research Institute, University of Edinburgh,47 Little France Crescent, Edinburgh, EH16 4TJ, UK.


A subset of leukocytes, known as the granulocytes, are the bodys first line of innate immune defense. The granulocytes are comprised of neutrophils, eosinophils and basophils of which the former two will be the focus of this review. Neutrophils defend the body against bacterial and fungal infection whilst eosinophils are thought to defend against parasitic invasions. Granulocytes are recruited to the site of infection or tissue damage where their relatively short half-life can be extended by regulatory external factors including hypoxic environments or agents that activate signaling pathways, such as NF-kB which is implicated in the up-regulation of anti-apoptotic genes. Granulocytes release various proteins, proteolytic enzymes and toxic oxygen products into the phagolysosome or surrounding environment destroying the invading organism. However, in order for inflammation to be resolved it is essential that granulocytes die by apoptosis and are phagocytosed by macrophages in a non-inflammatory fashion. This prevents the release of the cells histotoxic contents into the extracellular milieu thereby reducing the potential for tissue damage. In instances when granulocytes fail to appropriately enter apoptosis or a defect in phagocytic clearance occurs the inflammatory response can be perpetuated, potentially resulting in the development and promotion of inflammatory disorders such as asthma or rheumatoid arthritis. Thus, selective enhancement of apoptosis and augmentation of macrophage clearance could allow targeting of inflammatory resolution to provide potential novel therapeutic agents for the treatment of inflammatory disorders.


TNF receptor, apoptosome, anti-apoptotic genes, Bcl-2 family, caspase, PI3K signaling.

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Article Details

Volume: 5
Issue Number: 1
First Page: 3
Last Page: 12
Page Count: 10
DOI: 10.2174/187152306775537319

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