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Pfizer Oncology
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The safety and efficacy of this agent(s), or use in this setting, has not been established or is subject to confirmation. For an agent(s) whose safety and efficacy has not been established or confirmed, future regulatory approval or commercial availability is not guaranteed.

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Important Notice: The information provided here relates to investigational therapies. The safety and efficacy of these investigational therapies has not been proven.

Poster

Model-Informed Recommended Phase 3 Dose for a novel KAT6 inhibitor, PF-07248144, Following Dose Optimization in 2L+ ER+/HER2- Metastatic Breast Cancer (mBC) population

Kowalski K, Liyanage M, Jermain B, Hahn E, Hee B, Pithavala Y, Li M, Masters J

KAT6 Inhibitor | September 15, 2025 | ACCP 2025

C4551002 | NCT07062965

Presentation

Dose optimization of PF-07248144, a first-in-class KAT6 inhibitor, in patients with ER+/HER2− metastatic breast cancer: results from phase 1 study to support the recommended phase 3 dose

LoRusso P, Mukohara T, Sommerhalder D, Yonemori K, Hamilton E, Layman RM, Kim SB, Im SA, Rugo HS, Yamashita T, Yan F, Hara F, Kim G, Wang S, Kent S, Liu L, Skoura A, Kowalski K, Li M, Park YH

KAT6 Inhibitor | May 30, 2025 | ASCO 2025

C4551001 | NCT04606446

Poster

International phase 2 clinical trial comparing the effect of neoadjuvant PF-07220060 plus letrozole versus letrozole alone on Ki-67 tumor expression in postmenopausal women with HR+/HER2− breast cancer

Shom Goel, Khalil Zaman, Seock-Ah Im, Ahmed Elkhanany, Chiun-Sheng Huang, Cristian Villanueva, Sara Lopez Tarruella, Chin-Hee Chung, Ann Alcasid,Yuan Liu, ,Cynthia Basu, Michail Ignatiadis

Atirmociclib (PF-07220060) | December 13, 2024 | SABCS 2024

C4391025 | NCT06465368

Presentation

PHASE 1B/2 FIRST-IN-CLASS NOVEL COMBINATION TRIAL OF NEXT GENERATION CDK4-SELECTIVE INHIBITOR PF-07220060 AND NEXT GENERATION CDK2-SELECTIVE INHIBITOR PF-07104091 IN HR+ HER2- METASTATIC BREAST CANCER AND ADVANCED SOLID TUMORS

Yap T, Yan F, Sadeghi S, Lin T, Liu F, Malky L, Golmakani M, Moreau A, Neumann H, Zhou L, Juric D, Sharma M

Tegtociclib (PF-07104091) + Atirmociclib (PF-07220060) | September 13, 2024 | ESMO 2024

C4391002 | NCT05262400

Presentation

A phase 1 dose expansion study of a first-in-class KAT6 inhibitor — PF-07248144 in patients with advanced or metastatic ER+ HER2− breast cancer

Mukohara T, Park YH, Sommerhalder D, Yonemori K, Kim SB, Kim H, Iwata H, Yamashita T, Layman RM, Kim GM, Im SA, Lindeman GJ, Rugo HS, Liyanage M, Mishra NH, Maity AK, Bogg O, Meng Li M, LoRusso PM

KAT6 Inhibitor | June 1, 2024 | ASCO 2024

C4551001 | NCT04606446