PMID- 32846967 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20231104 IS - 2072-6694 (Print) IS - 2072-6694 (Electronic) IS - 2072-6694 (Linking) VI - 12 IP - 9 DP - 2020 Aug 24 TI - Perspectives on Triple-Negative Breast Cancer: Current Treatment Strategies, Unmet Needs, and Potential Targets for Future Therapies. LID - 10.3390/cancers12092392 [doi] LID - 2392 AB - Triple-negative breast cancer (TNBC), characterized by the absence or low expression of estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth factor receptor (HER2), is the most aggressive subtype of breast cancer. TNBC accounts for about 15% of breast cancer cases in the U.S., and is known for high relapse rates and poor overall survival (OS). Chemo-resistant TNBC is a genetically diverse, highly heterogeneous, and rapidly evolving disease that challenges our ability to individualize treatment for incomplete responders and relapsed patients. Currently, the frontline standard chemotherapy, composed of anthracyclines, alkylating agents, and taxanes, is commonly used to treat high-risk and locally advanced TNBC. Several FDA-approved drugs that target programmed cell death protein-1 (Keytruda) and programmed death ligand-1 (Tecentriq), poly ADP-ribose polymerase (PARP), and/or antibody drug conjugates (Trodelvy) have shown promise in improving clinical outcomes for a subset of TNBC. These inhibitors that target key genetic mutations and specific molecular signaling pathways that drive malignant tumor growth have been used as single agents and/or in combination with standard chemotherapy regimens. Here, we review the current TNBC treatment options, unmet clinical needs, and actionable drug targets, including epidermal growth factor (EGFR), vascular endothelial growth factor (VEGF), androgen receptor (AR), estrogen receptor beta (ERbeta), phosphoinositide-3 kinase (PI3K), mammalian target of rapamycin (mTOR), and protein kinase B (PKB or AKT) activation in TNBC. Supported by strong evidence in developmental, evolutionary, and cancer biology, we propose that the K-RAS/SIAH pathway activation is a major tumor driver, and SIAH is a new drug target, a therapy-responsive prognostic biomarker, and a major tumor vulnerability in TNBC. Since persistent K-RAS/SIAH/EGFR pathway activation endows TNBC tumor cells with chemo-resistance, aggressive dissemination, and early relapse, we hope to design an anti-SIAH-centered anti-K-RAS/EGFR targeted therapy as a novel therapeutic strategy to control and eradicate incurable TNBC in the future. FAU - Gupta, Gagan K AU - Gupta GK AD - Leroy T. Canoles Jr. Cancer Research Center, Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, Norfolk, VA 23501, USA. FAU - Collier, Amber L AU - Collier AL AUID- ORCID: 0000-0002-5238-227X AD - DeWitt Daughtry Family Department of Surgery, Surgical Oncology, University of Miami/Jackson Memorial Hospital, University of Miami Miller School of Medicine, Miami, FL 33131, USA. FAU - Lee, Dasom AU - Lee D AD - Department of Medicine, Internal Medicine, H. Lee Moffitt Cancer Center and Research Institute, University of South Florida, Tampa, FL 33620, USA. FAU - Hoefer, Richard A AU - Hoefer RA AD - Dorothy G. Hoefer Foundation, Sentara CarePlex Hospital, Newport News, VA 23666, USA. AD - Sentara Cancer Network, Sentara Healthcare, Norfolk, VA 23507, USA. FAU - Zheleva, Vasilena AU - Zheleva V AD - Surgical Oncology, Cancer Treatment Centers of America-Comprehensive Care and Research Center Phoenix, 14200 W Celebrate Life Way, Goodyear, AZ 85338, USA. FAU - Siewertsz van Reesema, Lauren L AU - Siewertsz van Reesema LL AD - Department of OB/GYN, University of Kentucky College of Medicine, University of Kentucky, Lexington, KY 40536, USA. FAU - Tang-Tan, Angela M AU - Tang-Tan AM AD - Department of Molecular and Cell Biology, UC Berkeley, Berkeley, CA 94720, USA. FAU - Guye, Mary L AU - Guye ML AUID- ORCID: 0000-0003-1622-8686 AD - Sentara Cancer Network, Sentara Healthcare, Norfolk, VA 23507, USA. AD - Sentara Surgery Specialists, Sentara CarePlex Hospital, Newport News, VA 23666, USA. FAU - Chang, David Z AU - Chang DZ AD - Virginia Oncology Associates, 1051 Loftis Boulevard, Suite 100, Newport News, VA 23606, USA. FAU - Winston, Janet S AU - Winston JS AD - Breast Pathology Services, Pathology Sciences Medical Group, Department of Pathology, Sentara Norfolk General Hospital (SNGH), Norfolk, VA 23507, USA. FAU - Samli, Billur AU - Samli B AD - Breast Pathology Services, Pathology Sciences Medical Group, Department of Pathology, Sentara Norfolk General Hospital (SNGH), Norfolk, VA 23507, USA. FAU - Jansen, Rick J AU - Jansen RJ AUID- ORCID: 0000-0001-5683-2584 AD - Department of Public Health, North Dakota State University, Fargo, ND 58102, USA. FAU - Petricoin, Emanuel F AU - Petricoin EF AD - Center for Applied Proteomics and Molecular Medicine, School of Systems Biology, George Mason University, Manassas, VA 20110, USA. FAU - Goetz, Matthew P AU - Goetz MP AUID- ORCID: 0000-0002-4383-270X AD - Departments of Oncology and Pharmacology, Mayo Clinic Breast Cancer Specialized Program of Research Excellence (SPORE), Women's Cancer Program, Mayo Clinic Cancer Center, Mayo Clinic, Rochester, MN 55905, USA. FAU - Bear, Harry D AU - Bear HD AD - Departments of Surgery and Microbiology & Immunology, Division of Surgical Oncology, Massey Cancer Center, Virginia Commonwealth University, Richmond, VA 23298, USA. FAU - Tang, Amy H AU - Tang AH AUID- ORCID: 0000-0002-5772-2878 AD - Leroy T. Canoles Jr. Cancer Research Center, Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, Norfolk, VA 23501, USA. LA - eng GR - BC180907/U.S. Department of Defense/ GR - R01 CA140550/NH/NIH HHS/United States GR - MF14S-009-LS/Center for Innovative Technology/ PT - Journal Article PT - Review DEP - 20200824 PL - Switzerland TA - Cancers (Basel) JT - Cancers JID - 101526829 PMC - PMC7565566 OTO - NOTNLM OT - Cytoxan OT - EGFR/K-RAS/SIAH signaling pathway OT - and Taxotere) OT - chemo-resistance OT - clinical diagnostics OT - concurrent ACT regimen (Adriamycin OT - improved patient survival OT - neoadjuvant chemotherapy (NACT) OT - pathologic incomplete responders (pIR) OT - prognostics OT - residual cancer burden (RCB) OT - sequential ACT regimen (AC-T) OT - triple-negative breast cancer (TNBC) OT - tumor recurrence OT - tumor-driving signaling pathways in TNBC COIS- The authors describe no conflict of interests. EDAT- 2020/08/28 06:00 MHDA- 2020/08/28 06:01 PMCR- 2020/08/24 CRDT- 2020/08/28 06:00 PHST- 2020/07/10 00:00 [received] PHST- 2020/08/10 00:00 [revised] PHST- 2020/08/20 00:00 [accepted] PHST- 2020/08/28 06:00 [entrez] PHST- 2020/08/28 06:00 [pubmed] PHST- 2020/08/28 06:01 [medline] PHST- 2020/08/24 00:00 [pmc-release] AID - cancers12092392 [pii] AID - cancers-12-02392 [pii] AID - 10.3390/cancers12092392 [doi] PST - epublish SO - Cancers (Basel). 2020 Aug 24;12(9):2392. doi: 10.3390/cancers12092392.