Pharmacologically Targeting the WNT/β-Catenin Signaling Cascade: Avoiding the Sword of Damocles

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Pharmacology of the WNT Signaling System

Part of the book series: Handbook of Experimental Pharmacology ((HEP,volume 269))

Abstract

WNT/β-catenin signaling plays fundamental roles in numerous developmental processes and in adult tissue homeostasis and repair after injury, by controlling cellular self-renewal, activation, division, differentiation, movement, genetic stability, and apoptosis. As such, it comes as no surprise that dysregulation of WNT/β-catenin signaling is associated with various diseases, including cancer, fibrosis, neurodegeneration, etc. Although multiple agents that specifically target the WNT/β-catenin signaling pathway have been studied preclinically and a number have entered clinical trials, none has been approved by the FDA to date. In this chapter, we provide our insights as to the reason(s) it has been so difficult to safely pharmacologically target the WNT/β-catenin signaling pathway and discuss the significant efforts undertaken towards this goal.

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Abbreviations

17-AAG:

17-Allylamino-geldanamycin

ALDH1:

Aldehyde dehydrogenase 1 family member A1

AML:

Acute myeloid leukemia

APC:

Adenomatous polyposis coli

ApcMin:

Mutant allele Min (multiple intestinal neoplasia) of the murine Apc locus which predisposes to intestinal adenoma formation

Arg1:

Arginase 1

Arg2:

Arginase 2

ASCO:

American Society of Clinical Oncology

BCL-2:

BCL2 apoptosis regulator

BCR–ABL:

Mutation that is formed by the combination of two genes, known as BCR (BCR activator of RhoGEF and GTPase) and ABL (ABL proto-oncogene 1, non-receptor tyrosine kinase)

BIRC5:

Baculoviral IAP repeat containing 5 (also known as survivin)

BMP:

Bone morphogenetic protein

BRAF:

B-Raf proto-oncogene, serine/threonine kinase

CAR-T:

Chimeric antigen receptor (CAR) T cells

CBP:

CREB-binding protein

Ccnd1:

Cyclin D1

Ccnd3:

Cyclin D3

CD133:

Prominin 1

CD27:

CD27 molecule

CD40:

CD40 molecule

CD44:

CD44 molecule (Indian blood group)

CD8A:

CD8a molecule

CDK1:

Cyclin dependent kinase 1

CDK2:

Cyclin dependent kinase 2

CDK4:

Cyclin dependent kinase 4

CDK6:

Cyclin dependent kinase 6

CK1α:

Casein kinase 1 alpha

CK20:

Keratin 20

CKO:

Conditional knockout

CLK:

CDC-like kinase

CLK2:

CDC like kinase 2

CLK3:

CDC like kinase 3

c-Myc:

MYC proto-oncogene, bHLH transcription factor

COMP:

Cartilage oligomeric matrix protein

COX:

Cyclooxygenase

CRC:

Colorectal cancer

Cre:

Cre recombinase

CreERT2:

Cre recombinase (Cre) fused to a mutant estrogen ligand-binding domain (ERT2) that requires the presence of tamoxifen for activity

CSC:

Cancer stem cells

CTLA4:

Cytotoxic T-lymphocyte associated protein 4

Cxcl1:

C-X-C motif chemokine ligand 1

Cxcl2:

C-X-C motif chemokine ligand 2

CYCA2:

Cyclin A2

DAB2:

Disabled homolog 2

DKK1:

Dickkopf WNT signaling pathway inhibitor 1

DVL:

Dishevelled segment polarity protein

DYRK1A:

Dual specificity tyrosine phosphorylation-regulated kinase 1A

EC50:

Concentration of a drug that gives half-maximal response

EGCG:

Epigallocatechin 3 gallate

ELISA:

Enzyme-linked immunosorbent assay

EMT:

Epithelial-mesenchymal transition

ETS:

Erythroblast transformation-specific

FDA:

US Food and Drug Administration

FGF:

Fibroblast growth factor

fl/fl:

Homozygous for allele floxed (flanked by loxP sites)

FLT3:

Fms related receptor tyrosine kinase 3

Foxp3:

Forkhead box P3

FZD:

Frizzled class receptor

FZD1:

Frizzled class receptor 1

FZD2:

Frizzled class receptor 2

FZD5:

Frizzled class receptor 5

FZD7:

Frizzled class receptor 7

FZD8:

Frizzled class receptor 8

GSK3:

Glycogen synthase kinase 3

GSK3β:

Glycogen synthase kinase 3 beta

hDVL1:

Human dishevelled segment polarity protein 1

HGF:

Hepatocyte growth factor

HGK:

Hematopoietic progenitor kinase/germinal center kinase-like kinase (also known as MAP4K4)

hMSC:

Human mesenchymal stem cells

HSC:

Hepatic stellate cells

IC50:

Half-maximal inhibitory concentration

iCRT:

Inhibitor of catenin responsive transcription (CRT)

Ifng:

Interferon gamma

IL10:

Interleukin 10

IWP:

Inhibitor of WNT production

IWR:

Inhibitor of WNT response

JAK:

Janus kinase

JAK3:

Janus kinase 3

Kat3:

Lysine acetyltransferases type 3

KD:

Dissociation constant

Lef:

Lymphoid enhancer factor

Lgr4:

Leucine rich repeat containing G protein-coupled receptor 4

Lgr5:

Leucine rich repeat containing G protein-coupled receptor 5

Lgr6:

Leucine rich repeat containing G protein-coupled receptor 6

Lkb1:

Liver kinase B1 (also known as Stk11)

LRP5:

LDL receptor-related protein 5

LRP6:

LDL receptor-related protein 6

MAPK:

Mitogen-activated protein kinase

MET:

MET proto-oncogene, receptor tyrosine kinase

MMTV:

Mouse mammary tumor virus

NCK:

NCK adaptor protein

NF-κB:

Nuclear factor-κB

NMR:

Nuclear magnetic resonance spectroscopy

Nrp1:

Neuropilin 1

NSAIDs:

Non-steroidal anti-inflammatory drugs

p300:

E1A binding protein p300

p53:

Tumor protein p53

PARP:

Poly(ADP-ribose) polymerase

PARP 1:

Poly(ADP-ribose) polymerase 1

PARP 2:

Poly(ADP-ribose) polymerase 2

PD-1:

Programmed cell death 1 (also known as PDCD1)

PDGFRα:

Platelet derived growth factor receptor alpha

PD-L1:

Programmed cell death 1 ligand 1

PDZ:

PDZ domain

PGE2:

Prostaglandin E2

PI3K:

Phosphatidylinositol 3-kinase

Porcn:

Porcupine O-acyltransferase

PTEN:

Phosphatase and tensin homolog

RAR:

Retinoic acid receptor

Rnf43:

Ring finger protein 43

RSPO:

R-spondin

RXR:

Retinoid X receptor

SAM68:

SRC-associated in mitosis 68 kDa protein (also known as KHDRBS1)

SRSF:

Serine and arginine rich splicing factor

SSC:

Somatic stem cells

Stat:

Signal transducer and activator of transcription

Tcf:

T-cell factor

TCF1:

T-cell factor 1

TCF4:

T-cell factor 4

Tcf7:

T-cell factor 7

TGFβ:

Transforming growth factor beta

TGFβ1:

Transforming growth factor beta 1

THBS1:

Thrombospondin 1

Tmax:

The time at which the maximum blood concentration of a drug is achieved after the drug has been administered and before the administration of a second dose

TNIK:

TRAF2 and NCK-interacting kinase

TNKS1:

Tankyrase 1

TNKS2:

Tankyrase 2

TRAF2:

TNF receptor associated factor 2

Tregs:

Regulatory T cells

TRKA:

Tropomyosin receptor kinase A

US:

United States

VDR:

Vitamin D receptor

WNT1:

Wnt family member 1

WNT3A:

Wnt family member 3A

αSMA:

Actin alpha 2, smooth muscle

β-CTX:

Beta C-terminal telopeptide

References

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Acknowledgements

The authors thank David P. Lin for assistance with illustrations/graphics. Keane K.Y. Lai has been supported by US National Institutes of Health (NIH) grant K08AA025112. Michael Kahn has been supported by City of Hope Comprehensive Cancer Center Support Grant NIH P30CA033572, NIH grants R01CA166161, R21NS074392, R21AI105057, and R01HL112638, and the Rotary Coins for Alzheimer’s Research Trust (CART).

Conflicts of Interest

Michael Kahn has an equity position in 3 + 2 Pharma.

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Lai, K.K.Y., Kahn, M. (2021). Pharmacologically Targeting the WNT/β-Catenin Signaling Cascade: Avoiding the Sword of Damocles. In: Schulte, G., Kozielewicz, P. (eds) Pharmacology of the WNT Signaling System. Handbook of Experimental Pharmacology, vol 269. Springer, Cham. https://doi.org/10.1007/164_2021_523

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