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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