Details of the Drug Combination

General Information of Drug Combination (ID: DC4RTES)

• Drug Combination Name: Letrozole + Pomalidomide
• Indication: Invasive ductal carcinoma; Status: Investigative [1]
• Component Drugs:
  Letrozole (DMH07Y3): Small molecular drug
  Pomalidomide (DMTGBAX): Small molecular drug
• High-throughput Screening Result:
  Testing Cell Line: T-47D
  Zero Interaction Potency (ZIP) Score: 1.74
  Bliss Independence Score: 2.83
  Loewe Additivity Score: 1.05
  LHighest Single Agent (HSA) Score: 0.33

Molecular Interaction Atlas of This Drug Combination

Indication(s) of Letrozole

Disease Entry	ICD 11	Status	REF
Estrogen-receptor positive breast cancer	N.A.	Approved	[2]
Hormonally-responsive breast cancer	2C60-2C65	Approved	[3]

Letrozole Interacts with 1 DTT Molecule(s)

DTT Name	DTT ID	UniProt ID	Mode of Action	REF
Aromatase (CYP19A1)	TTSZLWK	CP19A_HUMAN	Inhibitor	[6]

Letrozole Interacts with 3 DME Molecule(s)

DME Name	DME ID	UniProt ID	Mode of Action	REF
Cytochrome P450 3A4 (CYP3A4)	DE4LYSA	CP3A4_HUMAN	Metabolism	[7]
Aromatase (CYP19A1)	DEQX145	CP19A_HUMAN	Metabolism	[8]
Cytochrome P450 2A6 (CYP2A6)	DEJVYAZ	CP2A6_HUMAN	Metabolism	[9]

Letrozole Interacts with 18 DOT Molecule(s)

DOT Name	DOT ID	UniProt ID	Mode of Action	REF
Aromatase (CYP19A1)	OTZ6XF74	CP19A_HUMAN	Decreases Activity	[10]
Cytochrome P450 3A4 (CYP3A4)	OTQGYY83	CP3A4_HUMAN	Increases Oxidation	[11]
Cytochrome P450 2A6 (CYP2A6)	OT52TWG3	CP2A6_HUMAN	Increases Oxidation	[11]
Adenylate kinase isoenzyme 1 (AK1)	OT614AR3	KAD1_HUMAN	Increases ADR	[12]
Dickkopf-related protein 1 (DKK1)	OTRDLUSP	DKK1_HUMAN	Increases Expression	[13]
Follitropin subunit beta (FSHB)	OTGLS283	FSHB_HUMAN	Increases Expression	[14]
Lutropin subunit beta (LHB)	OT5GBOVJ	LSHB_HUMAN	Increases Expression	[14]
Progesterone receptor (PGR)	OT0FZ3QE	PRGR_HUMAN	Decreases Expression	[15]
Leukemia inhibitory factor (LIF)	OTO46S5S	LIF_HUMAN	Increases Expression	[13]
Gap junction alpha-1 protein (GJA1)	OTT94MKL	CXA1_HUMAN	Decreases Expression	[16]
G1/S-specific cyclin-D1 (CCND1)	OT8HPTKJ	CCND1_HUMAN	Decreases Expression	[17]
G1/S-specific cyclin-D2 (CCND2)	OTDULQF9	CCND2_HUMAN	Decreases Expression	[17]
Cyclin-dependent kinase inhibitor 1 (CDKN1A)	OTQWHCZE	CDN1A_HUMAN	Increases Expression	[18]
Leukemia inhibitory factor receptor (LIFR)	OT36W9O5	LIFR_HUMAN	Increases Expression	[13]
Proliferation marker protein Ki-67 (MKI67)	OTA8N1QI	KI67_HUMAN	Decreases Expression	[15]
Small ribosomal subunit protein eS6 (RPS6)	OTT4D1LN	RS6_HUMAN	Decreases Phosphorylation	[17]
Lanosterol 14-alpha demethylase (CYP51A1)	OTAYHG9C	CP51A_HUMAN	Decreases Activity	[19]
Fibroblast growth factor 22 (FGF22)	OTVIX6J0	FGF22_HUMAN	Increases Expression	[13]

Indication(s) of Pomalidomide

Disease Entry	ICD 11	Status	REF
Plasma cell myeloma	2A83.1	Approved	[4]
Systemic sclerosis	4A42	Approved	[5]

Pomalidomide Interacts with 1 DTT Molecule(s)

DTT Name	DTT ID	UniProt ID	Mode of Action	REF
Angiogenesis/myeloma cell growth (AMCG)	TTDIBYJ	NOUNIPROTAC	Modulator	[20]

Pomalidomide Interacts with 1 DTP Molecule(s)

DTP Name	DTP ID	UniProt ID	Mode of Action	REF
P-glycoprotein 1 (ABCB1)	DTUGYRD	MDR1_HUMAN	Substrate	[21]

Pomalidomide Interacts with 2 DME Molecule(s)

DME Name	DME ID	UniProt ID	Mode of Action	REF
Cytochrome P450 3A4 (CYP3A4)	DE4LYSA	CP3A4_HUMAN	Metabolism	[22]
Cytochrome P450 1A2 (CYP1A2)	DEJGDUW	CP1A2_HUMAN	Metabolism	[23]

Pomalidomide Interacts with 27 DOT Molecule(s)

DOT Name	DOT ID	UniProt ID	Mode of Action	REF
Cytochrome P450 3A4 (CYP3A4)	OTQGYY83	CP3A4_HUMAN	Increases Oxidation	[24]
Granulocyte-macrophage colony-stimulating factor (CSF2)	OT1M7D28	CSF2_HUMAN	Decreases Secretion	[25]
Interleukin-5 (IL5)	OTAFPSCO	IL5_HUMAN	Decreases Secretion	[25]
Granulocyte colony-stimulating factor (CSF3)	OT9GC6TP	CSF3_HUMAN	Increases Secretion	[25]
Fibroblast growth factor receptor 1 (FGFR1)	OT4GLCXW	FGFR1_HUMAN	Decreases Expression	[26]
C-C motif chemokine 2 (CCL2)	OTAD2HEL	CCL2_HUMAN	Increases Secretion	[25]
Erythroid transcription factor (GATA1)	OTX1R7O1	GATA1_HUMAN	Decreases Expression	[25]
Transcription factor JunD (JUND)	OTNKACJD	JUND_HUMAN	Decreases Expression	[25]
Transcription factor PU.1 (SPI1)	OTVCA1D0	SPI1_HUMAN	Increases Expression	[25]
Interleukin-10 (IL10)	OTIRFRXC	IL10_HUMAN	Increases Secretion	[25]
Fibroblast growth factor receptor 3 (FGFR3)	OTSAXDIL	FGFR3_HUMAN	Affects Expression	[26]
Endothelial transcription factor GATA-2 (GATA2)	OTBP2QQ2	GATA2_HUMAN	Decreases Expression	[25]
Rhombotin-2 (LMO2)	OTCC370G	RBTN2_HUMAN	Decreases Expression	[25]
Interleukin-13 (IL13)	OTI4YS3Y	IL13_HUMAN	Decreases Secretion	[25]
DNA-binding protein inhibitor ID-1 (ID1)	OTKGNZN5	ID1_HUMAN	Increases Expression	[25]
CCAAT/enhancer-binding protein alpha (CEBPA)	OTOM9OE4	CEBPA_HUMAN	Increases Expression	[25]
CCAAT/enhancer-binding protein delta (CEBPD)	OTNBIPMY	CEBPD_HUMAN	Increases Expression	[25]
DNA-binding protein inhibitor ID-2 (ID2)	OT0U1D53	ID2_HUMAN	Increases Expression	[25]
Krueppel-like factor 1 (KLF1)	OT1FK08U	KLF1_HUMAN	Decreases Expression	[25]
CCAAT/enhancer-binding protein epsilon (CEBPE)	OTKZA25M	CEBPE_HUMAN	Increases Expression	[25]
Transcription factor NF-E2 45 kDa subunit (NFE2)	OTLM94BI	NFE2_HUMAN	Decreases Expression	[25]
Zinc finger protein Gfi-1b (GFI1B)	OTRDW8YO	GFI1B_HUMAN	Decreases Expression	[25]
Zinc finger protein Gfi-1 (GFI1)	OT9HB9H8	GFI1_HUMAN	Increases Expression	[25]
Sal-like protein 4 (SALL4)	OTC08PR5	SALL4_HUMAN	Affects Binding	[27]
Cytochrome P450 2C19 (CYP2C19)	OTFMJYYE	CP2CJ_HUMAN	Increases Oxidation	[24]
Cytochrome P450 2J2 (CYP2J2)	OTJBTEH8	CP2J2_HUMAN	Increases Oxidation	[24]
Protein cereblon (CRBN)	OTXH9MDC	CRBN_HUMAN	Increases Response To Substance	[28]

Test Results of This Drug Combination in Other Disease Systems

Indication	DrugCom ID	Cell Line	Status	REF
Astrocytoma	DCUG40I	U251	Investigative	[29]
Childhood T acute lymphoblastic leukemia	DC5IY5U	CCRF-CEM	Investigative	[29]
Chronic myelogenous leukemia	DC677ZX	K-562	Investigative	[29]
High grade ovarian serous adenocarcinoma	DC410IM	NCI\\/ADR-RES	Investigative	[29]
Lung adenocarcinoma	DCVHIP6	HOP-62	Investigative	[29]
Non-small cell lung carcinoma	DC0L05U	HOP-92	Investigative	[29]
Carcinoma	DCR7SQD	RXF 393	Investigative	[1]

References

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• [2] Letrozole FDA Label
• [3] URL: http://www.guidetopharmacology.org Nucleic Acids Res. 2015 Oct 12. pii: gkv1037. The IUPHAR/BPS Guide to PHARMACOLOGY in 2016: towards curated quantitative interactions between 1300 protein targets and 6000 ligands. (Ligand id: 5209).
• [4] Pomalidomide FDA Label
• [5] URL: http://www.guidetopharmacology.org Nucleic Acids Res. 2015 Oct 12. pii: gkv1037. The IUPHAR/BPS Guide to PHARMACOLOGY in 2016: towards curated quantitative interactions between 1300 protein targets and 6000 ligands. (Ligand id: 7348).
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• [7] Inhibition of drug metabolizing cytochrome P450s by the aromatase inhibitor drug letrozole and its major oxidative metabolite 4,4'-methanol-bisbenzonitrile in vitro. Cancer Chemother Pharmacol. 2009 Oct;64(5):867-75.
• [8] Double-blind, randomised, multicentre endocrine trial comparing two letrozole doses, in postmenopausal breast cancer patients. Eur J Cancer. 1999 Feb;35(2):208-13.
• [9] Letrozole concentration is associated with CYP2A6 variation but not with arthralgia in patients with breast cancer. Breast Cancer Res Treat. 2018 Nov;172(2):371-379.
• [10] Aromatase inhibition: translation into a successful therapeutic approach. Clin Cancer Res. 2005 Apr 15;11(8):2809-21. doi: 10.1158/1078-0432.CCR-04-2187.
• [11] Deactivation of anti-cancer drug letrozole to a carbinol metabolite by polymorphic cytochrome P450 2A6 in human liver microsomes. Xenobiotica. 2009 Nov;39(11):795-802. doi: 10.3109/00498250903171395.
• [12] ADReCS-Target: target profiles for aiding drug safety research and application. Nucleic Acids Res. 2018 Jan 4;46(D1):D911-D917. doi: 10.1093/nar/gkx899.
• [13] Clomiphene citrate versus letrozole: molecular analysis of the endometrium in women with polycystic ovary syndrome. Fertil Steril. 2011 Oct;96(4):1051-6. doi: 10.1016/j.fertnstert.2011.07.1092.
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• [18] Synergistic activity of letrozole and sorafenib on breast cancer cells. Breast Cancer Res Treat. 2010 Nov;124(1):79-88. doi: 10.1007/s10549-009-0714-5. Epub 2010 Jan 7.
• [19] Comparison of lanosterol-14 alpha-demethylase (CYP51) of human and Candida albicans for inhibition by different antifungal azoles. Toxicology. 2006 Nov 10;228(1):24-32. doi: 10.1016/j.tox.2006.08.007. Epub 2006 Aug 12.
• [20] Radium 223 dichloride for prostate cancer treatment. Drug Des Devel Ther. 2017 Sep 6;11:2643-2651.
• [21] DrugBank 5.0: a major update to the DrugBank database for 2018. Nucleic Acids Res. 2018 Jan 4;46(D1):D1074-D1082. (ID: DB08910)
• [22] Pomalidomide: evaluation of cytochrome P450 and transporter-mediated drug-drug interaction potential in vitro and in healthy subjects. J Clin Pharmacol. 2015 Feb;55(2):168-78.
• [23] Population pharmacokinetics of pomalidomide. J Clin Pharmacol. 2015 May;55(5):563-72.
• [24] Human cytochrome P450 oxidation of 5-hydroxythalidomide and pomalidomide, an amino analogue of thalidomide. Chem Res Toxicol. 2014 Jan 21;27(1):147-56. doi: 10.1021/tx4004215. Epub 2013 Dec 24.
• [25] Immunomodulatory derivative of thalidomide (IMiD CC-4047) induces a shift in lineage commitment by suppressing erythropoiesis and promoting myelopoiesis. Blood. 2005 May 15;105(10):3833-40. doi: 10.1182/blood-2004-03-0828. Epub 2004 Aug 3.
• [26] Thalidomide and Its Analogs Differentially Target Fibroblast Growth Factor Receptors: Thalidomide Suppresses FGFR Gene Expression while Pomalidomide Dampens FGFR2 Activity. Chem Res Toxicol. 2019 Apr 15;32(4):589-602. doi: 10.1021/acs.chemrestox.8b00286. Epub 2019 Mar 15.
• [27] Thalidomide promotes degradation of SALL4, a transcription factor implicated in Duane Radial Ray syndrome. Elife. 2018 Aug 1;7:e38430. doi: 10.7554/eLife.38430.
• [28] A Dual Color Immunohistochemistry Assay for Measurement of Cereblon in Multiple Myeloma Patient Samples. Appl Immunohistochem Mol Morphol. 2016 Nov/Dec;24(10):695-702. doi: 10.1097/PAI.0000000000000246.
• [29] Recurrent recessive mutation in deoxyguanosine kinase causes idiopathic noncirrhotic portal hypertension.Hepatology. 2016 Jun;63(6):1977-86. doi: 10.1002/hep.28499. Epub 2016 Mar 31.