Details of the Drug Combination

General Information of Drug Combination (ID: DCAIMGY)

• Drug Combination Name: Tamoxifen + Anastrozole
• Indication: Bone Density; Status: Phase 1 [1]
• Component Drugs:
  Tamoxifen (DMLB0EZ): Small molecular drug
  Anastrozole (DMNP60F): Small molecular drug

Molecular Interaction Atlas of This Drug Combination

Indication(s) of Tamoxifen

Disease Entry	ICD 11	Status	REF
Breast cancer	2C60-2C65	Approved	[2]
Inflammatory breast cancer	2C62	Approved	[3]
Invasive ductal breast carcinoma	N.A.	Approved	[3]

Tamoxifen Interacts with 1 DTT Molecule(s)

DTT Name	DTT ID	UniProt ID	Mode of Action	REF
Estrogen receptor (ESR)	TTZAYWL	ESR1_HUMAN	Antagonist	[6]

Tamoxifen Interacts with 3 DTP Molecule(s)

DTP Name	DTP ID	UniProt ID	Mode of Action	REF
P-glycoprotein 1 (ABCB1)	DTUGYRD	MDR1_HUMAN	Substrate	[7]
Breast cancer resistance protein (ABCG2)	DTI7UX6	ABCG2_HUMAN	Substrate	[8]
Multidrug resistance-associated protein 7 (ABCC10)	DTPS120	MRP7_HUMAN	Substrate	[9]

Tamoxifen Interacts with 16 DME Molecule(s)

DME Name	DME ID	UniProt ID	Mode of Action	REF
Cytochrome P450 3A4 (CYP3A4)	DE4LYSA	CP3A4_HUMAN	Metabolism	[10]
Cytochrome P450 1A2 (CYP1A2)	DEJGDUW	CP1A2_HUMAN	Metabolism	[11]
UDP-glucuronosyltransferase 1A1 (UGT1A1)	DEYGVN4	UD11_HUMAN	Metabolism	[12]
Cytochrome P450 2A6 (CYP2A6)	DEJVYAZ	CP2A6_HUMAN	Metabolism	[13]
Cytochrome P450 1A1 (CYP1A1)	DE6OQ3W	CP1A1_HUMAN	Metabolism	[14]
Sulfotransferase 1A1 (SULT1A1)	DEYWLRK	ST1A1_HUMAN	Metabolism	[15]
Cytochrome P450 2D6 (CYP2D6)	DECB0K3	CP2D6_HUMAN	Metabolism	[16]
Cytochrome P450 3A5 (CYP3A5)	DEIBDNY	CP3A5_HUMAN	Metabolism	[17]
Cytochrome P450 2E1 (CYP2E1)	DEVDYN7	CP2E1_HUMAN	Metabolism	[13]
Thiopurine methyltransferase (TPMT)	DEFQ8VO	TPMT_HUMAN	Metabolism	[18]
Cytochrome P450 3A7 (CYP3A7)	DERD86B	CP3A7_HUMAN	Metabolism	[19]
Cytochrome P450 2C9 (CYP2C9)	DE5IED8	CP2C9_HUMAN	Metabolism	[20]
Cytochrome P450 2B6 (CYP2B6)	DEPKLMQ	CP2B6_HUMAN	Metabolism	[21]
Mephenytoin 4-hydroxylase (CYP2C19)	DEGTFWK	CP2CJ_HUMAN	Metabolism	[22]
UDP-glucuronosyltransferase 2B7 (UGT2B7)	DEB3CV1	UD2B7_HUMAN	Metabolism	[23]
UDP-glucuronosyltransferase 1A10 (UGT1A10)	DEL5N6Y	UD110_HUMAN	Metabolism	[24]

Tamoxifen Interacts with 1 DOT Molecule(s)

DOT Name	DOT ID	UniProt ID	Mode of Action	REF
Coagulation factor V (F5)	OTDMZ3LT	FA5_HUMAN	Increases ADR	[25]

Indication(s) of Anastrozole

Disease Entry	ICD 11	Status	REF
Breast cancer	2C60-2C65	Approved	[4]
Estrogen-receptor positive breast cancer	N.A.	Approved	[5]
Obesity	5B81	Approved	[5]

Anastrozole Interacts with 1 DTT Molecule(s)

DTT Name	DTT ID	UniProt ID	Mode of Action	REF
Aromatase (CYP19A1)	TTSZLWK	CP19A_HUMAN	Inhibitor	[26]

Anastrozole Interacts with 1 DTP Molecule(s)

DTP Name	DTP ID	UniProt ID	Mode of Action	REF
Putative sodium-coupled neutral amino acid transporter 7 (SLC38A7)	DT2EGUN	S38A7_HUMAN	Substrate	[27]

Anastrozole Interacts with 6 DME Molecule(s)

DME Name	DME ID	UniProt ID	Mode of Action	REF
Cytochrome P450 3A4 (CYP3A4)	DE4LYSA	CP3A4_HUMAN	Metabolism	[28]
UDP-glucuronosyltransferase 1A1 (UGT1A1)	DEYGVN4	UD11_HUMAN	Metabolism	[28]
Cytochrome P450 3A5 (CYP3A5)	DEIBDNY	CP3A5_HUMAN	Metabolism	[28]
Cytochrome P450 2C8 (CYP2C8)	DES5XRU	CP2C8_HUMAN	Metabolism	[28]
UDP-glucuronosyltransferase 2B7 (UGT2B7)	DEB3CV1	UD2B7_HUMAN	Metabolism	[28]
UDP-glucuronosyltransferase 1A3 (UGT1A3)	DEF2WXN	UD13_HUMAN	Metabolism	[28]

Anastrozole Interacts with 6 DOT Molecule(s)

DOT Name	DOT ID	UniProt ID	Mode of Action	REF
Adenylate kinase isoenzyme 1 (AK1)	OT614AR3	KAD1_HUMAN	Increases ADR	[29]
Progesterone receptor (PGR)	OT0FZ3QE	PRGR_HUMAN	Decreases Expression	[30]
Aromatase (CYP19A1)	OTZ6XF74	CP19A_HUMAN	Decreases Activity	[31]
NADPH--cytochrome P450 reductase (POR)	OTVIDOCH	NCPR_HUMAN	Decreases Activity	[32]
Gap junction alpha-1 protein (GJA1)	OTT94MKL	CXA1_HUMAN	Decreases Expression	[33]
Proliferation marker protein Ki-67 (MKI67)	OTA8N1QI	KI67_HUMAN	Decreases Expression	[34]

Test Results of This Drug Combination in Other Disease Systems

Indication	DrugCom ID	Cell Line	Status	REF
Quality of Life	DCUKPRA	N. A.	Phase 1	[35]

References

• [1] ClinicalTrials.gov (NCT00784940) ATAC - Bone Density Sub-Protocol
• [2] 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: 1016).
• [3] Tamoxifen FDA Label
• [4] 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: 5137).
• [5] Anastrozole FDA Label
• [6] Modulators of vascular sex hormone receptors and their effects in estrogen-deficiency states associated with menopause. Recent Pat Cardiovasc Drug Discov. 2008 Nov;3(3):165-86.
• [7] Mammalian drug efflux transporters of the ATP binding cassette (ABC) family in multidrug resistance: A review of the past decade. Cancer Lett. 2016 Jan 1;370(1):153-64.
• [8] The phytoestrogen genistein enhances multidrug resistance in breast cancer cell lines by translational regulation of ABC transporters. Cancer Lett. 2016 Jun 28;376(1):165-72.
• [9] Modulation of the ATPase and transport activities of broad-acting multidrug resistance factor ABCC10 (MRP7). Cancer Res. 2012 Dec 15;72(24):6457-67.
• [10] Comprehensive evaluation of tamoxifen sequential biotransformation by the human cytochrome P450 system in vitro: prominent roles for CYP3A and CYP2D6. J Pharmacol Exp Ther. 2004 Sep;310(3):1062-75.
• [11] Endoxifen and other metabolites of tamoxifen inhibit human hydroxysteroid sulfotransferase 2A1 (hSULT2A1). Drug Metab Dispos. 2014 Nov;42(11):1843-50.
• [12] Functional significance of UDP-glucuronosyltransferase variants in the metabolism of active tamoxifen metabolites. Cancer Res. 2009 Mar 1;69(5):1892-900.
• [13] Genotoxicity of tamoxifen, tamoxifen epoxide and toremifene in human lymphoblastoid cells containing human cytochrome P450s. Carcinogenesis. 1994 Jan;15(1):5-9.
• [14] Metabolism of tamoxifen by recombinant human cytochrome P450 enzymes: formation of the 4-hydroxy, 4'-hydroxy and N-desmethyl metabolites and isomerization of trans-4-hydroxytamoxifen. Drug Metab Dispos. 2002 Aug;30(8):869-74.
• [15] Tamoxifen-induced adduct formation and cell stress in human endometrial glands. Drug Metab Dispos. 2010 Jan;38(1):200-7.
• [16] CYP2D6 polymorphisms and tamoxifen metabolism: clinical relevance. Curr Oncol Rep. 2010 Jan;12(1):7-15.
• [17] Polymorphisms in cytochrome P4503A5 (CYP3A5) may be associated with race and tumor characteristics, but not metabolism and side effects of tamoxifen in breast cancer patients. Cancer Lett. 2005 Jan 10;217(1):61-72.
• [18] Polymorphism of estrogen metabolism genes and cataract. Med Hypotheses. 2004;63(3):494-7.
• [19] Drug Interactions Flockhart Table
• [20] Tamoxifen inhibits cytochrome P450 2C9 activity in breast cancer patients. J Chemother. 2006 Aug;18(4):421-4.
• [21] Effect of tamoxifen on the enzymatic activity of human cytochrome CYP2B6. J Pharmacol Exp Ther. 2002 Jun;301(3):945-52.
• [22] Cytochrome P450 pharmacogenetics and cancer. Oncogene. 2006 Mar 13;25(11):1679-91.
• [23] Metabolism and transport of tamoxifen in relation to its effectiveness: new perspectives on an ongoing controversy. Future Oncol. 2014 Jan;10(1):107-22.
• [24] Glucuronidation of active tamoxifen metabolites by the human UDP glucuronosyltransferases. Drug Metab Dispos. 2007 Nov;35(11):2006-14.
• [25] Factor V Leiden mutation and thromboembolism risk in women receiving adjuvant tamoxifen for breast cancer. J Natl Cancer Inst. 2010 Jul 7;102(13):942-9. doi: 10.1093/jnci/djq211. Epub 2010 Jun 16.
• [26] Effective aromatase inhibition by anastrozole in a patient with gonadotropin-independent precocious puberty in McCune-Albright syndrome. J Pediatr Endocrinol Metab. 2002;15 Suppl 3:945-8.
• [27] Anastrozole Aromatase Inhibitor Plasma Drug Concentration Genome-Wide Association Study: Functional Epistatic Interaction Between SLC38A7 and ALPPL2. Clin Pharmacol Ther. 2019 Jan 16.
• [28] In vitro and in vivo oxidative metabolism and glucuronidation of anastrozole. Br J Clin Pharmacol. 2010 Dec;70(6):854-69.
• [29] 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.
• [30] Aromatase inhibitors: cellular and molecular effects. J Steroid Biochem Mol Biol. 2005 May;95(1-5):83-9. doi: 10.1016/j.jsbmb.2005.04.010.
• [31] 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.
• [32] Assessment of Five Pesticides as Endocrine-Disrupting Chemicals: Effects on Estrogen Receptors and Aromatase. Int J Environ Res Public Health. 2022 Feb 10;19(4):1959. doi: 10.3390/ijerph19041959.
• [33] Inhibition of estrogen receptor reduces connexin 43 expression in breast cancers. Toxicol Appl Pharmacol. 2018 Jan 1;338:182-190. doi: 10.1016/j.taap.2017.11.020. Epub 2017 Nov 24.
• [34] Biomarker changes during neoadjuvant anastrozole, tamoxifen, or the combination: influence of hormonal status and HER-2 in breast cancer--a study from the IMPACT trialists. J Clin Oncol. 2005 Apr 10;23(11):2477-92. doi: 10.1200/JCO.2005.07.559. Epub 2005 Mar 14.
• [35] ClinicalTrials.gov (NCT00784680) ATAC - Quality of Life Sub-Protocol