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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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You are being redirected to the scientific presentations section. The information provided here relate to investigational assets. The safety and efficacy of the unapproved assets has not been proven. 

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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

Vepdegestrant, a PROteolysis TArgeting Chimera (PROTAC) estrogen receptor (ER) degrader, plus atirmociclib (ATI) in ER+/HER2− advanced or metastatic breast cancer (ABC): TACTIVE-K phase 1b/2 results

Telli ML, Ruiz-Borrego M, Yonemori K, Zhao Y, Jhaveri KL, Wang S, Patnaik A, Frenel JS, Xu P, Tran L, Lonning S, Berkowitz N, Zhang Y, Mazzoletti M, Fittipaldo A, Mukohara T

Vepdegestrant (ARV-471)* + Atirmociclib (PF-07220060) | May 30, 2026 | ASCO 2026

C4891026 | NCT06206837

Poster

Neoadjuvant atirmociclib plus letrozole versus letrozole alone in HR+/HER2− breast cancer: Results from FourLight-2, a randomized phase 2 window of opportunity study

Goel S, Blancas López-Barajas MI, Allegrini G, Alonso Romero JL, Rodriguez-Lescure A, Lopez Tarruella S, Grela-Wojewoda A, Grinda T, Villanueva C, Sarti S, Kurzeder C, Cikman I, Beeram M, Lee KT, Basu C, Kim S, Liu F, Yao J, Ignatiadis M

Atirmociclib (PF-07220060) | May 30, 2026 | ASCO 2026

C4391025 | NCT06465368

Poster

Pharmacodynamic effects of the first-in-class CDK4‑selective inhibitor atirmociclib (PF‑07220060) in combination with endocrine therapy in tumors of patients with HR+/HER2− metastatic breast cancer

Giordano A, Liu F, Roh W, Zhang H, Flores Diaz DF, Hernandez CA, Wu X, Sanchez MC, Park J, Delioukina M, Moss RA, Yap TA

Atirmociclib (PF-07220060) | December 9, 2025 | SABCS 2025

C4391001 | NCT04557449

Poster

Randomized phase 3 clinical trial evaluating atirmociclib plus letrozole versus a CDK4/6 inhibitor plus letrozole as first-line treatment for patients with HR+/HER2− advanced/metastatic breast cancer

Bidard FC, Ignatiadis M, Curigliano G, Xu B, Link T, Naito Y, Li H, Iwase M, Taylor MA, Barrios CH, Osako T, Kalinsky K, Giordano A, Goel S, Santarpia L, Gong J, Fernandez KC, Zhang Z, Rugo HS

Atirmociclib (PF-07220060) | October 19, 2025 | ESMO 2025

C4391025 | NCT06465368

Poster

Long -term safety and efficacy of first-line next generation CDK4-selective inhibitor atirmociclib + letrozole for the treatment of patients with HR+/HER2− metastatic breast cancer

Yap T, Magallanes M, Xu B, Kaen DL, Korbenfeld EP, Yan M, Zayas-Villanueva OA, Hernández CA, Schmid P, Mego M, Bella SR, Wu X, Siddiqui M, Basu C, Park J, Gong J, Giordano A

Atirmociclib (PF-07220060) | October 17, 2025 | ESMO AI 2025

C4391001 | NCT04557449

Poster

Effect of atirmociclib plus endocrine therapy (ET) on serum thymidine kinase activity (TKa) in a phase 1 study of patients with HR+/HER2−metastatic breast cancer (mBC)

Schmid P, Sharma MR, Giordano A, Howell SJ, Magallanes M, Kaen DL, Liu F, Zhang H, Chang YW, Park J, Holynskyj A, Yap TA

Atirmociclib (PF-07220060) | May 14, 2025 | ESMO BC 2025

C4391001 | NCT04557449

Poster

The next-generation CDK4-selective inhibitor atirmociclib (PF-07220060) in combination with letrozole as first-line treatment in patients with HR+/HER2+ metastatic breast cancer

Giordano A, Magallanes M, Xu B, Kaen D, Korbenfeld E, Yan M, Villanueva OZ, Hernandez CA, Schmid P, Mego M, Bella S, Wu X, Liu F, Basu C, Park J, Neumann H, Delioukina M, Yap TA

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

C4391001 | NCT04557449

Poster

Randomized phase 2 window of opportunity trial comparing the effect of preoperative atirmociclib (PF-07220060) plus letrozole versus letrozole alone on Ki-67 tumor expression in postmenopausal women with HR+/HER2– breast cancer

Goel S, Zaman K, Im SA, Elkhanany A, Huang CS, Villanueva C, Tarruella SL, Chung CH, Alcasid A, Liu Y, Basu C, Ignatiadis M

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

C4391025 | NCT06465368

Poster

Concentration-QTc analysis of PF-07220060 in patients with advanced solid tumors

Gao X, Ousey J, Delioukina M, Zhou L, Williams JH, Hoffman JT, Yang J

Atirmociclib (PF-07220060) | November 10, 2024 | ACoP 2024

C4391001 | NCT04557449

Poster

Longitudinal circulating tumor DNA (ctDNA) dynamics in phase 1/2a study of the first-in-class CDK4-selective inhibitor, atirmociclib (PF-07220060), in combination with endocrine therapy in patients with HR+/HER2– metastatic breast cancer (mBC) who progre

Yap TA, Liu F, Zhang H, Roh W, Giordano A, Hamilton EP, Delioukina M, Lira M, Park J, Basu C, Sharma MR

Atirmociclib (PF-07220060) | September 16, 2024 | ESMO 2024

C4391001 | NCT04557449

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