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Role of intracellular signaling pathways and their inhibitors in the treatment of inflammation

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Abstract

Inflammation is not only a defense mechanism of the innate immune system against invaders, but it is also involved in the pathogenesis of many diseases such as atherosclerosis, thrombosis, diabetes, epilepsy, and many neurodegenerative disorders. The World Health Organization (WHO) reports worldwide estimates of people (9.6% in males and 18.0% in females) aged over 60 years, suffering from symptomatic osteoarthritis, and around 339 million suffering from asthma. Other chronic inflammatory diseases, such as ulcerative colitis and Crohn’s disease are also highly prevalent. The existing anti-inflammatory agents, both non-steroidal and steroidal, are highly effective; however, their prolonged use is marred by the severity of associated side effects. A holistic approach to ensure patient compliance requires understanding the pathophysiology of inflammation and exploring new targets for drug development. In this regard, various intracellular cell signaling pathways and their signaling molecules have been identified to be associated with inflammation. Therefore, chemical inhibitors of these pathways may be potential candidates for novel anti-inflammatory drug approaches. This review focuses on the anti-inflammatory effect of these inhibitors (for JAK/STAT, MAPK, and mTOR pathways) describing their mechanism of action through literature search, current patents, and molecules under clinical trials.

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Abbreviations

PG:

Prostaglandin

T-cells:

Thymus cells

B-cells:

Bone marrow cells

WBCs:

White blood cells

WHO:

World health organization

NSAIDs:

Non-steroidal anti-inflammatory drugs

COX:

Cyclooxygenase

JAK/STAT:

Janus kinases and signal transducer and activator of transcription proteins

MAPK:

Mitogen-activated protein kinase

mTOR:

Mammalian target of rapamycin

JAK:

Janus kinases

MEK:

Serine/tyrosine/threonine kinase

mTOR:

Mammalian target of rapamycin

ER-positive breast cancer:

Estrogen receptor-positive breast cancer

RA:

Rheumatoid arthritis

cAMP:

Cyclic adenosine monophosphate

cGMP:

Cyclic guanosine monophosphate

Ca2+ :

Calcium

NF-κB:

Nuclear factor kappa light chain enhancer of activated B cells

DNA:

Deoxyribonucleic acid

SH2:

Src homology 2

EGF:

Epidermal growth factor

IL:

Interleukin

IFN:

Interferon

LIF:

Leukemia inhibitory factor

CNTF:

Ciliary neurotrophic factor

OM:

Oncostatin M

CT-1:

Cardiotrophin-1

G-CSF:

Granulocyte colony-stimulating factor

GM-CSF:

Granulocyte–macrophage colony stimulating factor

GH:

Growth factor

Epo:

Erythropoietin

Th2:

Thymus helper-2

IBD:

Inflammatory bowel disease

JNK:

C-Jun N-terminal kinase

ERK:

Xtracellular-signal-regulated kinase

MAPKKK:

Mitogen-activated protein kinase kinase kinase

MAPKK:

Mitogen-activated protein kinase kinase

MAPK:

Mitogen-activated protein kinase

RTK:

Receptor tyrosine kinases

GPCR:

G-protein-coupled receptors

TYK-2:

Non-receptor tyrosine-protein kinase

Sap-1a:

Serum response factor accessory protein-1

GADD153:

Growth arrest- and DNA damage-inducible gene 153

MNK1:

MAPK interacting protein kinase 1

ASK:

Apoptosis signal-regulating kinase

VEGF:

Vascular endothelial growth factor

BMK1:

Big mitogen-activated protein kinase

Atf-2:

Activating transcription factor 2

PEG-2:

Prostaglandin E2

TPA:

Tissue plasminogen activator

LPS:

Lipopolysaccharide

PPR:

Pattern recognition receptor

CSBP:

Cytokine-specific binding protein

Cd42:

Glycoprotein Ib

TSC:

Tissue sclerosis complex

OA:

Osteoarthritis

mRNA:

Messenger ribonucleic acid

COPD:

Chronic obstructive pulmonary disorder

PI3K:

Phosphoinositide 3-kinase

TNF:

Tumor necrosis factor

NA:

Not available

CD:

Crohn’s disease

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Authors

Contributions

GD and NN conceptualized the idea, following which NN reviewed the literature review and prepared the manuscript. GD supervised the writing process for the review article and both authors finalized the manuscript.

Corresponding author

Correspondence to Gaurav M. Doshi.

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The authors have no competing interests to declare.

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Not applicable since it is a review article.

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Nailwal, N.P., Doshi, G.M. Role of intracellular signaling pathways and their inhibitors in the treatment of inflammation. Inflammopharmacol 29, 617–640 (2021). https://doi.org/10.1007/s10787-021-00813-y

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