General Information:

Id: 4,118
Diseases: Multiple sclerosis - [OMIM]
Mammalia
review
Reference: Arnason BG et al.(2013) Mechanisms of action of adrenocorticotropic hormone and other melanocortins relevant to the clinical management of patients with multiple sclerosis Mult. Scler. 19: 130-136 [PMID: 23034287]

Interaction Information:

Comment ACTH binds to all five melanocortin receptors (MCRs). MC1R is expressed in skin, in melanocytes and monocytes, in neutrophils and lymphocytes, central nervous system (CNS), and in microglia and astrocytes.
Formal Description
Interaction-ID: 42428

gene/protein

ACTH

interacts (colocalizes) with

gene/protein

MC1R

Comment ACTH binds to all five melanocortin receptors (MCRs). MC2R, the adrenal receptor underlying the steroidogenic actions of ACTH, is also found in osteoblasts and skin.
Formal Description
Interaction-ID: 42492

gene/protein

ACTH

interacts (colocalizes) with

gene/protein

MC2R

MC2R is implicated in adrenal steroidogenesis.
Drugbank entries Show/Hide entries for MC2R
Comment ACTH binds to all five melanocortin receptors (MCRs). MC3R is found in the hypothalamus and limbic system.
Formal Description
Interaction-ID: 42493

gene/protein

ACTH

interacts (colocalizes) with

gene/protein

MC3R

Comment ACTH binds to all five melanocortin receptors (MCRs). MC4R, the dominant CNS receptor, is expressed in the cortex, thalamus, hypothalamus, brain stem and spinal cord.
Formal Description
Interaction-ID: 42494

gene/protein

ACTH

interacts (colocalizes) with

gene/protein

MC4R

Comment ACTH binds to all five melanocortin receptors (MCRs). MC5R, widely distributed in exocrine glands, is also found in lymphocytes.
Formal Description
Interaction-ID: 42495

gene/protein

ACTH

interacts (colocalizes) with

gene/protein

MC5R

Comment ACTH gel (H.P. Acthar Gel), a slow-release formulation of full-sequence ACTH (1-39), contains additional biologically active POMC peptides and has been used for decades to treat multiple sclerosis (MS) exacerbations.
Formal Description
Interaction-ID: 42496

drug/chemical compound

Corticotropin

decreases_activity of

Drugbank entries Show/Hide entries for Corticotropin
Comment ACTH can be cleaved to form alpha-MSH.
Formal Description
Interaction-ID: 42497

gene/protein

ACTH

affects_quantity of

gene/protein

Alpha-MSH

Comment ACTH and alpha-, beta- and gamma-MSH comprise the melanocortins.
Formal Description
Interaction-ID: 42498

gene/protein

ACTH

affects_activity of

gene/protein

Melanocortin

Comment ACTH and alpha-, beta- and gamma-MSH comprise the melanocortins.
Formal Description
Interaction-ID: 42499

gene/protein

Alpha-MSH

affects_activity of

gene/protein

Melanocortin

Comment Melanocortins are anti-inflammatory at cellular (i.e. directly suppressing immunocytes) and system levels (i.e. nervous system and glucocorticoid-mediated immune-system downregulation).
Formal Description
Interaction-ID: 42500

gene/protein

Melanocortin

increases_activity of

at cellular and system levels
Comment Melanocortins inhibit innate immune system cells widely, including macrophages peripherally and microglia in the CNS.
Formal Description
Interaction-ID: 42501

gene/protein

Melanocortin

decreases_activity of

of e.g. macrophages peripherally and microglia in the CNS
Comment Melanocortins inhibit innate immune system cells widely, including macrophages peripherally and microglia in the CNS.
Formal Description
Interaction-ID: 42502

gene/protein

Melanocortin

decreases_activity of

tissue/cell line

macrophage

(macrophages peripherally)
Comment Melanocortins inhibit innate immune system cells widely, including macrophages peripherally and microglia in the CNS.
Formal Description
Interaction-ID: 42503

gene/protein

Melanocortin

decreases_activity of

tissue/cell line

microglia

in CNS
Comment Stimulation of brain-expressed MC4Rs increases central release of neurotransmitters (e.g. noradrenalin (NA), acetylcholine (ACh), dopamine (DA)) that can quell microglia and, via descending neural pathways, triggers release in the periphery of anti-inflammatory NA and ACh from sympathetic and parasympathetic nerve endings.
Formal Description
Interaction-ID: 42504

gene/protein

MC4R

increases_activity of

Comment Stimulation of brain-expressed MC4Rs increases central release of neurotransmitters (e.g. noradrenalin (NA), acetylcholine (ACh), dopamine (DA)) that can quell microglia and, via descending neural pathways, triggers release in the periphery of anti-inflammatory NA and ACh from sympathetic and parasympathetic nerve endings.
Formal Description
Interaction-ID: 42505

gene/protein

MC4R

increases_quantity of

drug/chemical compound

Noradrenaline

Comment Stimulation of brain-expressed MC4Rs increases central release of neurotransmitters (e.g. noradrenalin (NA), acetylcholine (ACh), dopamine (DA)) that can quell microglia and, via descending neural pathways, triggers release in the periphery of anti-inflammatory NA and ACh from sympathetic and parasympathetic nerve endings.
Formal Description
Interaction-ID: 42506

gene/protein

MC4R

increases_quantity of

drug/chemical compound

Acetylcholine

Drugbank entries Show/Hide entries for
Comment Stimulation of brain-expressed MC4Rs increases central release of neurotransmitters (e.g. noradrenalin (NA), acetylcholine (ACh), dopamine (DA)) that can quell microglia and, via descending neural pathways, triggers release in the periphery of anti-inflammatory NA and ACh from sympathetic and parasympathetic nerve endings.
Formal Description
Interaction-ID: 42507

gene/protein

MC4R

increases_quantity of

drug/chemical compound

Dopamine

Drugbank entries Show/Hide entries for
Comment Stimulation of brain-expressed MC4Rs increases central release of neurotransmitters (e.g. noradrenalin (NA), acetylcholine (ACh), dopamine (DA)) that can quell microglia and, via descending neural pathways, triggers release in the periphery of anti-inflammatory NA and ACh from sympathetic and parasympathetic nerve endings.
Formal Description
Interaction-ID: 42508

drug/chemical compound

Noradrenaline

affects_activity of

tissue/cell line

microglia

Comment Stimulation of brain-expressed MC4Rs increases central release of neurotransmitters (e.g. noradrenalin (NA), acetylcholine (ACh), dopamine (DA)) that can quell microglia and, via descending neural pathways, triggers release in the periphery of anti-inflammatory NA and ACh from sympathetic and parasympathetic nerve endings.
Formal Description
Interaction-ID: 42509

drug/chemical compound

Acetylcholine

affects_activity of

tissue/cell line

microglia

Drugbank entries Show/Hide entries for Acetylcholine
Comment Stimulation of brain-expressed MC4Rs increases central release of neurotransmitters (e.g. noradrenalin (NA), acetylcholine (ACh), dopamine (DA)) that can quell microglia and, via descending neural pathways, triggers release in the periphery of anti-inflammatory NA and ACh from sympathetic and parasympathetic nerve endings.
Formal Description
Interaction-ID: 42510

drug/chemical compound

Dopamine

affects_activity of

tissue/cell line

microglia

Drugbank entries Show/Hide entries for Dopamine
Comment Alpha-MSH restrains the nuclear factor-kappaB (NF-kappaB) transcription factor.
Formal Description
Interaction-ID: 42511

gene/protein

Alpha-MSH

decreases_activity of

complex/PPI

NF-kappaB complex

Comment Phosphorylation of IkappaB by cytokines, bacterial products, or viruses causes IkappaB degradation.
Formal Description
Interaction-ID: 42514

gene/protein

Cytokine

increases_phosphorylation of

gene/protein

NFKBI

and causes IkappaB degradation
Comment Phosphorylation of IkappaB by cytokines, bacterial products, or viruses causes IkappaB degradation.
Formal Description
Interaction-ID: 42515

gene/protein

Cytokine

decreases_quantity of

gene/protein

NFKBI

by degradation
Comment Phosphorylation of IkappaB by cytokines, bacterial products, or viruses causes IkappaB degradation.
Formal Description
Interaction-ID: 42516

environment

bacterial product

increases_phosphorylation of

gene/protein

NFKBI

and causes IkappaB degradation
Comment Phosphorylation of IkappaB by cytokines, bacterial products, or viruses causes IkappaB degradation.
Formal Description
Interaction-ID: 42517

process

viral process

decreases_quantity of

gene/protein

NFKBI

by degradation
Comment Phosphorylation of IkappaB by cytokines, bacterial products, or viruses causes IkappaB degradation.
Formal Description
Interaction-ID: 42518

process

viral process

increases_phosphorylation of

gene/protein

NFKBI

and causes IkappaB degradation
Comment Newly freed NF-kappaB translocates to the nucleus and binds to DNA sequences encoding NF-kappaB-responsive elements that then trigger transcription of target genes.
Formal Description
Interaction-ID: 42519

complex/PPI

NF-kappaB complex

is localized in

cellular component

nucleus

after translocation
Comment Newly freed NF-kappaB translocates to the nucleus and binds to DNA sequences encoding NF-kappaB-responsive elements that then trigger transcription of target genes.
Formal Description
Interaction-ID: 42520

complex/PPI

NF-kappaB complex

interacts (colocalizes) with

cellular component

DNA

after translocation NF-kappaB binds to DNA sequences encoding NF-kappaB-responsive elements
Comment Newly freed NF-kappaB translocates to the nucleus and binds to DNA sequences encoding NF-kappaB-responsive elements that then trigger transcription of target genes.
Formal Description
Interaction-ID: 42521

complex/PPI

NF-kappaB complex

increases_activity of

of target genes
Comment Tissue-destructive nitric oxide and neopterin release from macrophages (which rises during MS flares) is also reduced by melanocortins.
Formal Description
Interaction-ID: 42522

gene/protein

Melanocortin

decreases_quantity of

drug/chemical compound

NO

from macrophages
Comment alpha-MSH increases production of anti-inflammatory IL-10. This reinforces the immunosuppressive capacity of alpha-MSH.
Formal Description
Interaction-ID: 42523

gene/protein

Alpha-MSH

increases_quantity of

gene/protein

IL10

Comment IL-10 levels are subnormal in progressive MS.
Formal Description
Interaction-ID: 42524

decreases_quantity of

gene/protein

IL10

Comment alpha-MSH and ACTH induce regulatory T cells (Tregs) that suppress disease in the experimental autoimmune encephalomyelitis (EAE) model of MS.
Formal Description
Interaction-ID: 42525

gene/protein

Alpha-MSH

increases_activity of

Comment Tissue-destructive nitric oxide and neopterin release from macrophages (which rises during MS flares) is also reduced by melanocortins.
Formal Description
Interaction-ID: 42536

gene/protein

Melanocortin

decreases_quantity of

drug/chemical compound

Neopterin

from macrophages
Comment alpha-MSH and ACTH induce regulatory T cells (Tregs) that suppress disease in the experimental autoimmune encephalomyelitis (EAE) model of MS.
Formal Description
Interaction-ID: 42537

gene/protein

ACTH

increases_activity of

Comment alpha-MSH and ACTH induce regulatory T cells (Tregs) that suppress disease in the experimental autoimmune encephalomyelitis (EAE) model of MS.
Formal Description
Interaction-ID: 42538

tissue/cell line

regulatory T-lymphocyte

decreases_activity of

phenotype

experimental autoimmune encephalomyelitis

Comment ACTH increases tyrosine hydroxylase mRNA, and hence NA synthesis, in SNS ganglion neurons.
Formal Description
Interaction-ID: 42539

gene/protein

ACTH

increases_expression of

gene/protein

TH

ACTH increases tyrosine hydroxylase mRNA.
Drugbank entries Show/Hide entries for TH
Comment ACTH increases tyrosine hydroxylase mRNA, and hence NA synthesis, in SNS ganglion neurons.
Formal Description
Interaction-ID: 42540

gene/protein

ACTH

increases_quantity of

drug/chemical compound

Noradrenaline

in SNS ganglion neurons
Comment NA modulates inflammation and protects against EAE, suggesting that melanocortin-induced NA release may be relevant in MS, a notion reinforced by findings with the beta2-adrenergic agonist albuterol which, as an add-on to glatiramer acetate, strikingly reduces MS relapses.
Formal Description
Interaction-ID: 42566

drug/chemical compound

Noradrenaline

affects_activity of

Comment NA modulates inflammation and protects against EAE, suggesting that melanocortin-induced NA release may be relevant in MS, a notion reinforced by findings with the beta2-adrenergic agonist albuterol which, as an add-on to glatiramer acetate, strikingly reduces MS relapses.
Formal Description
Interaction-ID: 42567

drug/chemical compound

Noradrenaline

decreases_activity of

phenotype

experimental autoimmune encephalomyelitis

Comment Melanocortins increase immunosuppressive NA outflow via four reinforcing mechanisms.
Formal Description
Interaction-ID: 42568

gene/protein

Melanocortin

increases_quantity of

drug/chemical compound

Noradrenaline

Comment Peripheral cholinergic pathways downregulate inflammatory responses via macrophage-expressed alpha7-nicotinic ACh receptors (AChRs).
Formal Description
Interaction-ID: 42570

process

cholinergic pathway (peripheral)

decreases_activity of

via macrophage-expressed alpha7-nicotinic ACh receptors (AChRs)
Comment DMVN neuron activation by central alpha-MSH/ACTH triggers ACh release from their efferent endings.
Formal Description
Interaction-ID: 42571

gene/protein

Alpha-MSH

increases_activity of

tissue/cell line

DMVN neuron

and triggers ACh release from their efferent endings
Comment Released ACh engages monocyte/macrophage alpha7-nicotinic AChRs.
Formal Description
Interaction-ID: 42572

drug/chemical compound

Acetylcholine

increases_activity of

gene/protein

CHRNA7

Drugbank entries Show/Hide entries for Acetylcholine or CHRNA7
Comment DMVN neuron activation by central alpha-MSH/ACTH triggers ACh release from their efferent endings.
Formal Description
Interaction-ID: 42573

gene/protein

ACTH

increases_activity of

tissue/cell line

DMVN neuron

and triggers ACh release from their efferent endings
Comment Systemic ACTH or alpha-MSH given peripherally, heighten CNS-restricted actions like motivation, attention, arousal, learning and memory.
Formal Description
Interaction-ID: 42574

gene/protein

ACTH

increases_activity of

process

motivation

Comment Systemic ACTH or alpha-MSH given peripherally, heighten CNS-restricted actions like motivation, attention, arousal, learning and memory.
Formal Description
Interaction-ID: 42575

gene/protein

ACTH

increases_activity of

process

attention

Comment Systemic ACTH or alpha-MSH given peripherally, heighten CNS-restricted actions like motivation, attention, arousal, learning and memory.
Formal Description
Interaction-ID: 42576

gene/protein

ACTH

increases_activity of

process

arousal

Comment Systemic ACTH or alpha-MSH given peripherally, heighten CNS-restricted actions like motivation, attention, arousal, learning and memory.
Formal Description
Interaction-ID: 42577

gene/protein

ACTH

increases_activity of

Comment LC (locus ceruleus) ablation causes NA depletion throughout the cortex and frees microglia to make proinflammatory cytokines. Thus, decreased LC metabolism in MS links to cognitive impairment.
Formal Description
Interaction-ID: 42578

phenotype

decreased locus ceruleus metabolism level

cooccurs with

phenotype

cognitive impairment

Comment Released NA, bound to beta2-adrenegic receptors on microglia, promotes microglial quiescence.
Formal Description
Interaction-ID: 42580

drug/chemical compound

Noradrenaline

decreases_activity of

tissue/cell line

microglia

if bound to beta2-adrenegic receptors on microglia
Comment LC (locus ceruleus) ablation causes NA depletion throughout the cortex and frees microglia to make proinflammatory cytokines. Thus, decreased LC metabolism in MS links to cognitive impairment.
Formal Description
Interaction-ID: 42581

tissue/cell line

locus ceruleus

affects_quantity of

drug/chemical compound

Noradrenaline

in the cortex
Comment LC (locus ceruleus) ablation causes NA depletion throughout the cortex and frees microglia to make proinflammatory cytokines. Thus, decreased LC metabolism in MS links to cognitive impairment.
Formal Description
Interaction-ID: 42582

tissue/cell line

locus ceruleus

affects_activity of

tissue/cell line

microglia

in the cortex
Comment LC (locus ceruleus) ablation causes NA depletion throughout the cortex and frees microglia to make proinflammatory cytokines. Thus, decreased LC metabolism in MS links to cognitive impairment.
Formal Description
Interaction-ID: 42583

tissue/cell line

locus ceruleus

affects_quantity of

gene/protein

Proinflammatory cytokine

in the cortex
Comment Glutamate activates microglia.
Formal Description
Interaction-ID: 42584

drug/chemical compound

Glutamate

increases_activity of

tissue/cell line

microglia

Comment In MS, CNS-restricted proinflammatory cytokines (e.g. TNF-alpha) made by microglia are upregulated, whereas anti-inflammatory cytokines (e.g. IL-10) are suppressed.
Formal Description
Interaction-ID: 42585

increases_quantity of

gene/protein

Proinflammatory cytokine

(CNS-restricted proinflammatory cytokines made by microglia)
Comment In MS, CNS-restricted proinflammatory cytokines (e.g. TNF-alpha) made by microglia are upregulated, whereas anti-inflammatory cytokines (e.g. IL-10) are suppressed.
Formal Description
Interaction-ID: 42586

increases_quantity of

gene/protein

TNF

(CNS-restricted TNF-alpha made by microglia)
Drugbank entries Show/Hide entries for TNF
Comment In MS, CNS-restricted proinflammatory cytokines (e.g. TNF-alpha) made by microglia are upregulated, whereas anti-inflammatory cytokines (e.g. IL-10) are suppressed.
Formal Description
Interaction-ID: 42587

decreases_quantity of

gene/protein

Antiinflammatory cytokine

(CNS-restricted antiinflammatory cytokines made by microglia)
Comment In MS, CNS-restricted proinflammatory cytokines (e.g. TNF-alpha) made by microglia are upregulated, whereas anti-inflammatory cytokines (e.g. IL-10) are suppressed.
Formal Description
Interaction-ID: 42588

decreases_quantity of

gene/protein

IL10

(CNS-restricted antiinflammatory cytokines made by microglia)
Comment Melanocortins bound to MC1Rs on activated microglia suppress production of the proinflammatory mediators TNF-alpha, IL-6 and nitric oxide.
Formal Description
Interaction-ID: 42589

gene/protein

Melanocortin

decreases_quantity of

gene/protein

TNF

if melanocortins are bound to MC1Rs on activated microglia
Drugbank entries Show/Hide entries for TNF
Comment Melanocortins bound to MC1Rs on activated microglia suppress production of the proinflammatory mediators TNF-alpha, IL-6 and nitric oxide (NO).
Formal Description
Interaction-ID: 42590

gene/protein

Melanocortin

decreases_quantity of

gene/protein

IL6

if melanocortins are bound to MC1Rs on activated microglia
Drugbank entries Show/Hide entries for IL6
Comment Melanocortins bound to MC1Rs on activated microglia suppress production of the proinflammatory mediators TNF-alpha, IL-6 and nitric oxide (NO).
Formal Description
Interaction-ID: 42591

gene/protein

Melanocortin

interacts (colocalizes) with

gene/protein

MC1R

on activated microglia
Comment ACTH, contrary to steroids, promotes osteoblast differentiation from an immature into a mineralizing phenotype and counteracts dexamethasone-induced osteoblast apoptosis.
Formal Description
Interaction-ID: 42592

gene/protein

ACTH

increases_activity of

Comment Alpha-MSH restrains the nuclear factor-kappaB (NF-kappaB) transcription factor.
Formal Description
Interaction-ID: 106880

gene/protein

Alpha-MSH

decreases_activity of

complex/PPI

NF-kappaB complex

via restraining the NF-kappaB transcription factor
Comment Newly freed NF-kappaB translocates to the nucleus and binds to DNA sequences encoding NF-kappaB-responsive elements that then trigger transcription of target genes.
Formal Description
Interaction-ID: 106890

complex/PPI

NF-kappaB complex

increases_activity of

complex/PPI

NF-kappaB complex