PR: Exploring the full spectrum of macrophage activation

10 important questions on PR: Exploring the full spectrum of macrophage activation

What is the Extracellular matrix?

Extracellular matrix, Secreted products of many cell types that form an organized scaffold for

cell support.

What is a Classically activated macrophage?

Classically activated macrophage, A macrophage that is activated through Toll-like receptors

and interferon-γ. These cells exhibit enhanced killing of intracellular microorganisms,

increased secretion of cytokines and mediators, and higher expression of co-stimulatory

molecules.

What is a Alternatively activated macrophage?

Alternatively activated macrophage, A macrophage that is activated by interleukin-4 (IL-4) or

IL-13 and expresses arginase-1, mannose receptor (CD206) and IL-4 receptor-α. Pathogenassociated

molecular patterns that are expressed by helminths may also drive the alternative

activation of macrophages.

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What are Superoxide anions?

 

Superoxide anions, Anions that are produced by NADPH oxidase in phagocytes and can

dismutate to hydrogen peroxide, which can be converted into ferryl or hydroxyl radicals by

the fenton reaction.

What re immune complexes?

Immune complexes, Antigen–antibody complexes that bind to and crosslink Fcγ receptors.

What is the G-protein-coupled receptor?

G-protein-coupled receptor, A receptor that is composed of seven membrane-spanning helical

segments, which are connected by extracellular and intracellular loops. These receptors

associate with G proteins, which are a family of trimeric intracellular-signalling proteins that

have specific β-and γ-chains, and one of several α-chains.

What is a Tumour-associated macrophage?

Tumour-associated macrophage, A cell that differentiates from circulating blood monocytes

that have infiltrated tumours. Tumour-associated macrophages constitute an important

component of the tumour microenvironment and can have positive or negative effects on

tumorigenesis (that is, tumour promotion or immunosurveillance, respectively).

What is Antibody-dependent enhancement?

Antibody-dependent enhancement, A phenomenon that was originally described in Dengue

virus infection in which the presence of antibody enhances viral infection and increases disease

severity.

What is insulin resistance?

Insulin resistance, Failure of cells to appropriately respond to insulin-mediated induction of

glucose uptake, resulting in increased blood sugar levels and possibly type 2 diabetes.

What is Metabolic syndrome?

Metabolic syndrome, A combination of disorders, including hypertension, obesity, high blood

glucose levels and dyslipidaemia, that can result in cardiovascular disease.

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