TABLE 2

Inhibitors of the Wnt signaling and their effects in cancer

Targets and FunctionsAgent NameFunctional Effects in CancerDevelopment StageReference
Small molecule tankyrase (TNKS1/2) inhibitors, stabilizing AXIN1/2IWRsDiscoveryChen et al., 2009
XAV939Inhibited colony formation of colorectal cancer cell line DLD-1.Huang et al., 2009
WIKI4James et al., 2012
NVP-TNKS656Shultz et al., 2013
JW67, JW74Both compounds suppressed in vitro proliferation of colorectal cancer cell line SW480; JW74 reduced SW480 in vivo tumor growth and adenoma formation in ApcMin mice.PreclinicalWaaler et al., 2011
JW55Suppressed in vitro proliferation of SW480; decreased adenoma formation in conditional Apc knockout mice.Waaler et al., 2012
G007-LKSuppressed in vitro colony formation and in vivo tumor growth of colorectal cancer cell lines COLO-320DM and SW403 and spheroid formation of ApcMin mouse intestinal adenoma.Lau et al., 2013
K-756Suppressed in vitro proliferation of COLO-320DM and SW403; showed dose-dependent inhibition of Wnt signaling in DLD-1 xenografts.Okada-Iwasaki et al., 2016
Small molecule CK1α activators, promoting β-catenin degradationPyrviniumSuppressed in vitro proliferation of colorectal cancer cell lines SW480, DLD-1, SW620, HCT116, and HT29; reduced adenoma formation in ApcMin mice.PreclinicalThorne et al., 2010; Li et al., 2014;
SSTC3Suppressed intestinal organoid formation from ApcMin mice and Apc knockout mice; reduced adenoma formation in ApcMin mice; suppressed in vitro colony formation of HT29, SW403, and HCT116 and in vivo tumor growth of HCT116; suppressed tumor organoid formation from three patient colorectal tumors and in vivo growth of xenografts.Li et al., 2017
Small molecule inhibitors blocking β-catenin/TCF interactioniCRT3, iCRT5, and iCRT14iCRTs led to cell cycle arrest in HCT116 and HT29; iCRT3 suppressed in vitro growth of primary human colon cancer specimens; iCRT14 reduced HCT116 and HT29 xenograft growth.PreclinicalGonsalves et al., 2011
Small molecule inhibitors blocking β-catenin/CBP interactionICG-001Suppressed in vitro growth and led to apoptosis in SW480 and HCT116; suppressed in vivo growth of SW620 xenografts; reduced adenoma formation in ApcMin mice; suppressed in vitro growth of pancreatic cancer cell lines AsPC-1, L3.6pl, MIA PaCa-2, and PANC-1; improved survival of AsPC-1 orthotopic xenograft-bearing mice.PreclinicalEmami et al., 2004; Arensman et al., 2014
PRI-724The active enantiomer of ICG-001; entered Phase 1 and 2 clinical trials for treating advanced cancers.Phase 1 and 2 clinical trialsClinicalTrials.gov NCT01764477, NCT01302405, NCT01606579, NCT02413853
Small molecule inhibitor blocking β-catenin/p300 interactionWindorphenSuppressed in vitro proliferation of colorectal cancer cell lines SW480 and RKO and prostate cancer cell lines DU145 and PC3.DiscoveryHao et al., 2013
Small molecule PORCN inhibitors, blocking Wnt secretionIWPsDiscoveryChen et al., 2009
C59Inhibited MMTV-Wnt1 tumor growth in vivo.PreclinicalProffitt et al., 2013
LGK974Induced regression of MMTV-WNT1 tumors; inhibited in vitro colony formation of head and neck cancer cell line HN30 and RNF43-mutant pancreatic cancer cell lines Patu8988S and HPAF-II; inhibited in vivo tumor growth in xenografts of HN30 and RNF43-mutant pancreatic cancer cell lines Capan2 and HPAF-II; entered Phase 1 and 2 clinical trials for treating cancers.Phase 1 and 2 clinical trialsJiang et al., 2013; Liu et al., 2013; ClinicalTrials.gov NCT01351103, NCT02278133, NCT02649530
ETC-159Inhibited in vitro colony formation of teratocarcinoma cell lines PA-1 and RNF43-mutant pancreatic and ovarian cancer cell lines HPAF-II, AsPC-1, and MCAS; suppressed in vivo tumor growth in xenografts of HPAF-II, AsPC-1, teratocarcinoma cell lines PA-1 and NCCIT, and patient-derived colorectal tumor xenografts with RSPO3 fusions; entered Phase 1 clinical trial for treating advanced cancers.Phase 1 clinical trialMadan et al., 2016a; ClinicalTrials.gov NCT02521844
RXC004Suppressed in vivo tumor growth of Capan2 xenografts; entered Phase 1 clinical trial for treating advanced cancers.Phase 1 clinical trialBhamra et al., 2017; ClinicalTrials.gov NCT03447470
CGX1321Suppressed in vivo tumor growth of patient-derived gastric and colorectal tumor xenografts with RSPO2 fusions; entered Phase 1 clinical trial for treating advanced cancers.Phase 1 clinical trialLi et al., 2018; ClinicalTrials.gov NCT03507998, NCT02675946
Decoy Wnt receptorIpafricept (OMP-54F28)Suppressed in vivo tumor growth of patient-derived hepatocellular carcinoma, pancreatic and ovarian cancer xenografts, and decreased the cancer stem cell frequency; entered Phase 1 clinical trials for treating advanced cancers; in a Phase 1 clinical trial, two desmoid tumor, and a patient with germ cell cancer treated with Ipafricept experienced stable disease for >6 mo.Phase 1 clinical trialsJimeno et al., 2017; ClinicalTrials.gov NCT02069145, NCT02092363, NCT02050178, NCT01608867
Anti-Frizzled1,2,5,7,8 antibodyVantictumab (OMP-18R5)Suppressed in vivo tumor growth of patient-derived colorectal, breast, lung, and pancreatic tumor xenografts and PA-1 xenografts; decreased the cancer stem cell frequency; entered Phase 1 clinical trials for treating cancers.Phase 1 clinical trialsGurney et al., 2012; ClinicalTrials.gov NCT01345201, NCT02005315, NCT01957007, NCT01973309
Anti-Frizzled5,8 antibodiesIgG-2919, IgG-2921Both antibodies suppressed in vitro proliferation of RNF43-mutant pancreatic cancer cell lines HPAF-II, Patu8988S, and AsPC-1, and led to cell cycle arrest; IgG-2912 suppressed in vivo tumor growth of HPAF-II and AsPC-1 xenografts and organoid formation of RNF43-mutant colorectal cancers.PreclinicalSteinhart et al., 2017
Anti-LRP6 antibodiesA7-IgG, B2-IgGA7-IgG specifically inhibited tumor growth of MMTV-Wnt1 xenografts; B2-IgG specifically inhibited tumor growth of MMTV-Wnt3 xenografts.PreclinicalEttenberg et al., 2010
Anti-RSPO antibodiesAnti-RSPO1 antibody, anti-RSPO2 antibody, anti-RSPO3 antibodiesSuppressed in vivo tumor growth of patient-derived colorectal, lung, and ovarian tumor xenografts with corresponding RSPO overexpression; Anti-RSPO3 antibody (OMP-131R10) has entered Phase 1 clinical trial for treating advanced solid tumors and metastatic colorectal cancers.Preclinical, phase 1 clinical trial (OMP-131R10)Chartier et al., 2016; Storm et al., 2016; ClinicalTrials.gov NCT02482441