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touchPANEL DISCUSSION
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New and emerging agents in HER2-negative metastatic breast cancer: Implications for current and future practice

  • Downloads including slides are available for this activity in the Toolkit
Learning Objectives

After watching this activity, participants should be better able to:

  • Discuss how novel treatments may be integrated into clinical practice for HER2-negative mBC, including optimal patient identification and treatment sequencing
  • Identify considerations surrounding the use of ADCs and evaluate how safety management may support adherence in patients with HER2-negative mBC
  • Evaluate the latest data for novel and emerging ADCs in managing HER2-negative mBC
Overview

In this activity, three oncology experts discuss the expanding targeted treatment options for human epidermal growth factor receptor 2 (HER2)-negative metastatic breast cancer (mBC), including optimal patient identification and treatment sequencing, before focusing on approved and emerging antibody–drug conjugates (ADCs) for HER2-negative mBC, including the latest efficacy and safety data and considerations for use in clinical practice. The discussion is guided by pre-canvassed questions provided by healthcare professionals involved in the management of patients with HER2-negative mBC.

This activity is jointly provided by USF Health and touchIME. read more

Target Audience

Oncologists, including breast cancer specialists involved in the management of HER2-negative mBC.

Disclosures

USF Health adheres to the Standards for Integrity and Independence in Accredited Continuing Education. All individuals in a position to influence content have disclosed to USF Health any financial relationship with an ineligible organization. USF Health has reviewed and mitigated all relevant financial relationships related to the content of the activity. The relevant relationships are listed below. All individuals not listed have no relevant financial relationships.

Faculty

Prof. Giuseppe Curigliano discloses: Advisory board or panel fees from AstraZeneca, Bristol Myers Squibb, Daiichi Sankyo, Eli Lilly, Gilead Sciences, Inc., Menarini, Merck & Co., Novartis, Pfizer, Roche, Seagen (all relationships terminated). Consultancy fees from AstraZeneca, Bristol Myers Squibb, Daiichi Sankyo, Eli Lilly, Gilead Sciences, Inc., Menarini, Merck & Co., Novartis, Pfizer, Roche, Seagen (all relationships terminated). Grants/research support from Merck & Co. Speakers bureau fees from Eli Lilly, Gilead Sciences, Inc. and Pfizer (all relationships terminated).

Prof. Hope Rugo discloses: Consultancy and advisory board fees from Daiichi Sankyo, Eisai, Mylan, Napo Pharmaceuticals and Puma Biotechnology. Grants/research support from Astellas Pharma, AstraZeneca, Daiichi Sankyo, Eli Lilly, Genentech, Gilead Sciences, Inc., GSK, Merck & Co., Novartis, OBI Pharma, Inc., Pfizer, Pionyr Immunotherapeutics, Roche, Sermonix Pharmaceuticals, Taiho Oncology, Inc. and Veru. Other financial or material support (royalties, patent, etc.) from AstraZeneca, Gilead Sciences, Inc. and Merck & Co.

Prof. Peter Schmid discloses: Advisory board or panel fees from AstraZeneca, Bayer, Boehringer Ingelheim, Celgene, Eisai, Merck & Co., Novartis, Pfizer, Puma Biotechnology and Roche. Consultancy fees from AstraZeneca, Bayer, Boehringer Ingelheim, Celgene, Eisai, Merck & Co., Novartis, Pfizer, Puma Biotechnology and Roche. Grants/research support from Astellas Pharma, AstraZeneca, Genentech, Medivation, Novartis, OncoGenex Pharmaceuticals and Roche.

Content reviewer

Danielle Walker, DNP, APRN, AGNP-C has no relevant financial relationships to disclose.

Touch Medical Contributors

Aniket Parikh and Katrina Lester have no financial interests/relationships or affiliations in relation to this activity.

USF Health Office of Continuing Professional Development and touchIME staff have no financial interests/relationships or affiliations in relation to this activity.

Requirements for Successful Completion

In order to receive credit for this activity, participants must review the content and complete the post-test and evaluation form. Statements of credit are awarded upon successful completion of the post-test and evaluation form.

If you have questions regarding credit please contact cpdsupport@usf.edu.

Accreditations

Physicians

This activity has been planned and implemented in accordance with the accreditation requirements and policies of the Accreditation Council for Continuing Medical Education (ACCME) through a joint providership of USF Health and touchIME. USF Health is accredited by the ACCME to provide continuing medical education for physicians.

USF Health designates this enduring material for a maximum of 0.75 AMA PRA Category 1 CreditTM.  Physicians should claim only the credit commensurate with the extent of their participation in the activity.

The European Union of Medical Specialists (UEMS) – European Accreditation Council for Continuing Medical Education (EACCME) has an agreement of mutual recognition of continuing medical education (CME) credit with the American Medical Association (AMA). European physicians interested in converting AMA PRA Category 1 CreditTM into European CME credit (ECMEC) should contact the UEMS (www.uems.eu).

Advanced Practice Providers

Physician Assistants may claim a maximum of 0.75 Category 1 credits for completing this activity. NCCPA accepts AMA PRA Category 1 CreditTM from organizations accredited by ACCME or a recognized state medical society.

The AANPCP accepts certificates of participation for educational activities approved for AMA PRA Category 1 CreditTM by ACCME-accredited providers. APRNs who participate will receive a certificate of completion commensurate with the extent of their participation.

Date of original release: 14 August 2023. Date credits expire: 14 August 2024.

If you have any questions regarding credit please contact cpdsupport@usf.edu.

This activity is CE/CME accredited

To obtain the CE/CME credit(s) from this activity, please complete this post-activity test.

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Topics covered in this activity

Breast Cancer
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touchPANEL DISCUSSION
New and emerging agents in HER2-negative metastatic breast cancer: Implications for current and future practice
0.75 CE/CME credit

Question 1/5
Which of the following criteria support the use of first-line CDK4/6 inhibitors in patients with mBC?

CDK4/6, cyclin dependent kinase 4/6; HER2, human epidermal growth factor receptor 2; HR, hormone receptor; mBC, metastatic breast cancer; PD-L1, programmed death-ligand 1; TNBC, triple-negative breast cancer.

The standard of care for HR+/HER2-negative mBC is the combination of a CDK4/6 inhibitor (palbociclib, ribociclib or abemaciclib) plus an endocrine agent in the first-line setting.1,2 All three CDK4/6 inhibitors have demonstrated significant improvements in PFS in first- or second-line treatment of patients with HR+/HER2-negative mBC.2

Abbreviations

CDK4/6, cyclin dependent kinase 4/6; HER2, human epidermal growth factor receptor 2; HR, hormone receptor; mBC, metastatic breast cancer; PFS, progression-free survival.

References

  1. Grinshpun, A. NPJ Breast Cancer. 2023;9:15.
  2. Scirocchi F, et al. EBioMedicine. 2022;79:104010.
Question 2/5
Your 57-year-old female patient has HR+ mBC and a HER2 status of 0 according to IHC. She was previously treated with first-line fulvestrant plus ribociclib and experienced disease control for >18 months. She was subsequently treated with everolimus plus exemestane in the second line, and elacestrant in the third line. Following bone metastases, she received capecitabine but experienced liver metastases after 6 months of treatment. Which of the following treatments would you consider next, assuming all options are approved and available?

HER2, human epidermal growth factor receptor 2; HR, hormone receptor; IHC, immunohistochemistry; mBC, metastatic breast cancer.

Sacituzumab govitecan is FDA- and EMA-approved for the treatment of patients with unresectable locally advanced or HR+/HER2-negative mBC (IHC 0, IHC 1+ or IHC 2+/ISH–) who have received endocrine-based therapy and at least two additional systemic therapies in the metastatic setting.1–3

Abbreviations

EMA, European Medicines Agency; FDA, US Food and Drug Administration; HER2, human epidermal growth factor receptor 2; HR, hormone receptor; IHC, immunohistochemistry; ISH, in situ hybridization; mBC, metastatic breast cancer.

References

  1. FDA. Sacituzumab govitecan PI. Available at:
     https://bit.ly/45JgvH0 (accessed 12 July 2023).
  2. EMA. 2023. Available at: https://bit.ly/3QhVWvT (accessed 02 August 2023).
  3. Pharmaceutical technology. Available at: https://bit.ly/3YhfZMI (accessed 31 July 2023).
Question 3/5
Your 62-year-old female patient with HR+/HER2-negative mBC is about to initiate treatment with sacituzumab govitecan. Considering nausea and vomiting are common treatment-emergent side effects, what would you do next to best manage this patient?

HER2, human epidermal growth factor receptor 2; HR, hormone receptor; mBC, metastatic breast cancer.

The FDA prescribing information and EMA summary of product characteristics for sacituzumab govitecan recommend premedication with a two- or three-drug combination regimen prior to each dose of sacituzumab govitecan for prevention of chemotherapy-induced nausea and vomiting.1,2

Abbreviations

EMA, European Medicines Agency; FDA, US Food and Drug Administration.

References

  1. FDA. Sacituzumab govitecan PI. Available at: https://bit.ly/45JgvH0 (accessed 12 July 2023).
  2. EMA. Sacituzumab govitecan SmPC. Available at: https://bit.ly/3DseodE (accessed 12 July 2023).
Question 4/5
The TROPION-PanTumor01 trial is investigating the efficacy and safety of datopotamab deruxtecan in patients with HR+/HER2-negative mBC and mTNBC. Based on interim results, what was the ORR observed in these patients?

HER2, human epidermal growth factor 2; HR, hormone receptor; mBC, metastatic breast cancer; mTNBC, metastatic triple-negative breast cancer; ORR, objective response rate.

In the phase I TROPION-PanTumor01 trial (NCT03401385) investigating datopotamab deruxtecan in patients with HR+/HER2-negative unresectable or mBC,1 and patients with relapsed/refractory unresectable advanced or mTNBC, with 1–3 prior lines of chemotherapy,1 the ORR was 27% in patients with HR+/HER2–negative mBC,2 and 32% in patients with advanced or mTNBC.3

Abbreviations

HER2, human epidermal growth factor receptor 2; HR, hormone receptor; mBC, metastatic breast cancer; mTNBC, metastatic triple negative breast cancer; ORR, objective response rate.

References

  1. ClinicalTrials.gov. NCT03401385. Available at: bit.ly/3rNAO6B (accessed 27 July 2023).
  2. Bardia A, et al. Presented at: 40th Annual Miami Breast Cancer Conference, Miami, FL, USA. 2–5 March 2023;37:14–15.
  3. Bardia A, et al. Presented at: 40th Annual Miami Breast Cancer Conference, Miami, FL, USA. 2–5 March 2023;37:13–14.
Question 5/5
Based on data available from the DESTINY-Breast04 trial, how would you counsel your patients on the most common side effect they may experience with trastuzumab deruxtecan?

TEAE, treatment-emergent adverse event.

In the phase III DESTINY-Breast04 trial (NCT03734029), nausea was reported as the most common all-grade TEAE in patients with HR+/HER2-low mBC treated with trastuzumab deruxtecan, occurring in 73% of patients. By comparison, nausea was reported in 24% of patients treated with TPC.

Abbreviations

HER2, human epidermal growth factor receptor 2; HR, hormone receptor; mBC, metastatic breast cancer; TEAE, treatment-emergent adverse event; TPC, treatment of physician’s choice.

Reference

Modi S, et al. N Engl J Med. 2022;387:9–20.

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