Promising combo slows advanced breast cancer in major trial
NCT ID NCT02107703
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This phase 3 study tested whether adding the drug abemaciclib to standard hormone therapy (fulvestrant) helps women with a common type of advanced breast cancer (HR+, HER2-) live longer without their cancer growing. About 669 women took part, receiving either the combination or fulvestrant alone. The goal was to see if the combination delays disease progression.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 3
Large-scale testing in a bigger group. Usually the last step before a treatment can be approved.
- Participants
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669 people
The number who actually took part.
- Started
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Jul 2014
- Expected to finish
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Dec 2027
An estimate. End dates often move.
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Female participants only
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria * Have a diagnosis of HR+, HER2- breast cancer * Have locally advanced disease not amenable to curative treatment by surgery or metastatic disease. In addition, participants must fulfill 1 of the following criteria: * relapsed with radiologic evidence of progression while receiving neoadjuvant or adjuvant endocrine therapy, with no subsequent endocrine therapy received following progression * relapsed with radiologic evidence of progression within 1 year from completion of adjuvant endocrine therapy, with no subsequent endocrine therapy received following progression * relapsed with radiologic evidence of progression more than 1 year from completion of adjuvant endocrine therapy and then subsequently relapsed with radiologic evidence of progression after receiving treatment with either an antiestrogen or an aromatase inhibitor as first-line endocrine therapy for metastatic disease. Participants may not have received more than 1 line of endocrine therapy or any prior chemotherapy for metastatic disease * presented de novo with metastatic disease and then relapsed with radiologic evidence of progression after receiving treatment with either an antiestrogen or an aromatase inhibitor as first line endocrine therapy for metastatic disease. Participants may not have received more than 1 line of endocrine therapy or any prior chemotherapy for metastatic disease * for the endocrine naïve cohort: Must not have received prior endocrine therapy in current or prior disease setting * Have postmenopausal status due to either surgical/natural menopause or ovarian suppression (initiated at least 28 days prior to Day 1 of Cycle 1) with a gonadotropin-releasing hormone (GnRH) agonist such as goserelin * Have a negative serum pregnancy test at baseline (within 14 days prior to randomization) and agree to use medically approved precautions to prevent pregnancy during the study and for 12 weeks following the last dose of abemaciclib if postmenopausal status is due to ovarian suppression with a GnRH agonist * Have either measurable disease or nonmeasurable bone only disease * Have a performance status ≤1 on the Eastern Cooperative Oncology Group (ECOG) scale * Have discontinued previous therapies for cancer (including specifically, aromatase inhibitors, anti-estrogens, chemotherapy, radiotherapy, and immunotherapy) for at least 21 days for myelosuppressive agents or 14 days for nonmyelosuppressive agents prior to receiving study drug, and recovered from the acute effects of therapy (until the toxicity resolves to either baseline or at least Grade 1) except for residual alopecia or peripheral neuropathy Exclusion Criteria * Are currently receiving an investigational drug in a clinical trial or participating in any other type of medical research judged not to be scientifically or medically compatible with this study * Have visceral crisis, lymphangitic spread, or leptomeningeal carcinomatosis visceral crisis is not the mere presence of visceral metastases but implies severe organ dysfunction as assessed by symptoms and signs, laboratory studies, and rapid progression of the disease * Have clinical evidence or history of central nervous system metastasis * Have received prior treatment with chemotherapy (except for neoadjuvant/ adjuvant chemotherapy), fulvestrant, everolimus, or any CDK4/6 inhibitor. For the endocrine naïve cohort: In addition, have received treatment with any prior endocrine therapy * Have received treatment with a drug that has not received regulatory approval for any indication within 14 or 21 days prior to randomization of study drug for a nonmyelosuppressive or myelosuppressive agent, respectively * Have received recent (within 28 days prior to randomization) yellow fever vaccination * Have had major surgery within 14 days prior to randomization of study drug to allow for post-operative healing of the surgical wound and site(s) * Have a personal history within the last 12 months of any of the following conditions: syncope of cardiovascular etiology, ventricular tachycardia, ventricular fibrillation, or sudden cardiac arrest * Have inflammatory breast cancer or a history of any other cancer (except nonmelanoma skin cancer or carcinoma in-situ of the cervix), unless in complete remission with no therapy for a minimum of 3 years * Have received an autologous or allogeneic stem-cell transplant * Have active bacterial or fungal infection, or detectable viral infection * Have initiated bisphosphonates or approved Receptor activator of nuclear factor kappa-B (RANK) ligand targeted agents \<7 days prior to randomization
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Aalborg Universitets hospital
Aalborg, 9000, Denmark
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Agios Savvas Regional Cancer Hospital
Athens, Attikí, 11522, Greece
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Aichi Cancer Center Hospital
Nagoya, Aichi-ken, 464-8681, Japan
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Antwerp University Hospital
Edegem, Antwerpen, 2650, Belgium
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Arkhangelsk Clinical Oncological Dispensary
Arkhangelsk, Arkhangelskaya oblast, 163045, Russia
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Asan Medical Center
Seoul, Seoul-teukbyeolsi [Seoul], 5505, South Korea
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Ashford Cancer Centre Research
Kurralta Park, South Australia, 5037, Australia
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Azienda Ospedaliero Universitaria S.Anna
Cona, Emilia-Romagna, 44124, Italy
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Baylor College of Medicine
Houston, Texas, 77030, United States
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Bialostockie Centrum Onkologii, Oddzial Onkologii Klinicznej
Bialystok, 15-027, Poland
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Billings Clinic
Billings, Montana, 59101, United States
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Breslin Cancer Center
Lansing, Michigan, 48910, United States
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CHU Besançon
Besançon, Doubs, 25000, France
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Centre Hospitalier Universitaire de Liège - Domaine Universitaire du Sart Tilman
Liège, 4000, Belgium
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Centre Jean Perrin - Centre Régional de Lutte contre le Cancer d'Auvergne
Clermont-Ferrand, Puy-de-Dôme, 63011, France
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Centro Oncológico Internacional (COI)
Guadalajara, Jalisco, 45647, Mexico
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Centrul de Oncologie "Sfântul Nectarie"
Craiova, Dolj, 200347, Romania
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Centrum Terapii Wspolczesnej J. M. Jasnorzewska Spolka Komandytowo-Akcyjna
Lodz, Łódź Voivodeship, Poland
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Chang Gung Medical Foundation-Linkou Branch
Taoyuan, 333, Taiwan
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Chang Gung Memorial Hospital at Kaohsiung
Kaohsiung Niao Sung Dist, Kaohsiung, 83301, Taiwan
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Chania General Hospital 'Agios Georgios'
Chania, 73300, Greece
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Chiba cancer center
Chiba, Chiba, 260-8717, Japan
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China Medical University Hospital
Taichung, 40447, Taiwan
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Chungbuk National University Hospital
Cheongju-si, Chungcheongbuk-do [Chungbuk], 28644, South Korea
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Clinique Victor Hugo - Centre Jean Bernard
Le Mans, 72000, France
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Columbia University Medical Center
New York, New York, 10032, United States
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Dana Farber Cancer Institute
Boston, Massachusetts, 02215, United States
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Dartmouth-Hitchcock Medical Center
Lebanon, New Hampshire, 03756-0001, United States
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Facharztzentrum Eppendorf
Hamburg, 20249, Germany
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Fed State Budgetary Inst "N.N. Blokhin Med Center of Oncology" MHRF
Moscow, Moscow, 115478, Russia
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Florida Cancer Specialists - North
St. Petersburg, Florida, 33705, United States
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Florida Cancer Specialists - South
Fort Myers, Florida, 33901, United States
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Freeman Cancer Institute
Joplin, Missouri, 64804, United States
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Gachon University Gil Medical Center
Namdong-gu, Incheon-gwangyeoksi [Incheon], 21565, South Korea
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Gemeinschaftspraxis hop-augsburg
Augsburg, Bavaria, 86150, Germany
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Gold Coast University Hospital
Southport, Queensland, 4215, Australia
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Grupo Medico Camino Sc
Mexico City, Mexico City, 03310, Mexico
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HUG-Hôpitaux Universitaires de Genève
Geneva, 1211, Switzerland
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Harbin Clinic
Rome, Georgia, 30165, United States
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Helsinki University Hospital - Comprehensive Cancer Center (HYKS - Syöpäkeskus)
Helsinki, Uusimaa, 00029, Finland
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Herlev and Gentofte Hospital
Copenhagen, Capital Region, 2730, Denmark
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Highlands Oncology Group
Springdale, Arkansas, 72762, United States
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Holy Cross Hospital
Fort Lauderdale, Florida, 33308, United States
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Hospital Angeles
Tijuana, Estado de Baja California, 22010, Mexico
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Hospital Clinico San Carlos
Madrid, 28040, Spain
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Hospital General Universitario Morales Meseguer
Murcia, Murcia, Región de, 30008, Spain
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Hospital General Universitario de Elche
Elche, Alicante, 03202, Spain
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Hospital Quirónsalud Valencia
Valencia, València, 46010, Spain
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Hospital Universitari Vall d'Hebron
Barcelona, Barcelona [Barcelona], 08035, Spain
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Hospital Universitario 12 de Octubre
Madrid, Madrid, Comunidad de, 28041, Spain
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Hospital Universitario Arnau de Vilanova de Lleida
Lleida, Lleida [Lérida], 25198, Spain
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Humber River Hospital
Toronto, Ontario, M3M 0B2, Canada
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Hyogo College of Medicine
Nishinomiya, Hyōgo, 663-8501, Japan
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Ianuli Med Consult SRL
Bucharest, 010976, Romania
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Icahn School of Medicine at Mount Sinai
New York, New York, 10029, United States
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Icon Cancer Centre South Brisbane
South Brisbane, Queensland, 4101, Australia
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Inha University Hospital
Incheon, Incheon-gwangyeoksi [Incheon], 22332, South Korea
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Instituto Nacional de Cancerologia
Mexico City, Mexico City, 14070, Mexico
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Istituto Nazionale Tumori Regina Elena
Rome, Roma, 00144, Italy
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Istituto Oncologico Veneto IRCCS
Padova, 35128, Italy
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Japanese Foundation for Cancer Research
Koto, Tokyo, 135-8550, Japan
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Jichi Medical University Hospital
Shimotsuke, Tochigi, 329- 0498, Japan
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Kadlec Clinic Hematology and Oncology
Kennewick, Washington, 99336, United States
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Kaiser Permanente
Riverside, California, 92505, United States
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Kaohsiung Medical University Hospital
Kaohsiung City, 80756, Taiwan
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Kaohsiung Veterans General Hospital
Kaohsiung City, 81362, Taiwan
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Klinikum Ludwigsburg
Ludwigsburg, Baden-Wurttemberg, 71640, Germany
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Klinikum der Ludwig-Maximilians-Universitaet Muenchen
München, Bavaria, 80336, Germany
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Kursk Regional Oncology Dispensary
Kursk, Russian Federation, 305035, Russia
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Kurume General Hospital
Kurume, Fukuoka, 830-0013, Japan
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Kyoto University Hospital
Kyoto, 606-8507, Japan
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London Regional Cancer Program
London, Ontario, N6A 5W9, Canada
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Minnesota Oncology/Hematology PA
Minneapolis, Minnesota, 55404, United States
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Moffitt Cancer Center, Richard M. Shulze Family Foundation Outpatient Center
Tampa, Florida, 33612, United States
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Monash Cancer Centre
East Bentleigh, Victoria, 3165, Australia
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N.N.Petrov Research Institute of Oncology
Saint Petersburg, Sankt-Peterburg, 197758, Russia
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National Cancer Center Hospital
Chuo-ku, Tokyo, 104-0045, Japan
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National Cancer Center Hospital East
Kashiwa, Chiba, 277-8577, Japan
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National Hospital Organization Hokkaido Cancer Center
Sapporo, Hokkaido, 003-0804, Japan
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National Hospital Organization Kyushu Cancer Center
Fukuoka, 811-1395, Japan
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National Hospital Organization Osaka Medical Center
Osaka, 540-0006, Japan
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National Hospital Organization Shikoku Cancer Center
Matsuyama, Ehime, 791-0280, Japan
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National Taiwan University Hospital
Taipei, 10002, Taiwan
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Niigata Cancer Center Hospital
Niigata, Niigata, 951-8566, Japan
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Novant Health, Oncology Research Institute
Winston-Salem, North Carolina, 27103, United States
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OCA Hospital
Monterrey, Nuevo León, 64000, Mexico
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Oklahoma Cancer Specialists & Research Institute, LLC
Tulsa, Oklahoma, 74146, United States
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Oncology Consultants P.A.
Houston, Texas, 77030, United States
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Osaka International Cancer Institute
Osaka, 541-8567, Japan
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Ospedale Bellaria - Azienda USL di Bologna
Bologna, 40139, Italy
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Palm Beach Cancer Institue
Atlantis, Florida, 33462, United States
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Palm Beach Cancer Institue
Palm Beach Gardens, Florida, 33410, United States
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Palm Beach Cancer Institue
Wellington, Florida, 33414, United States
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Palm Beach Cancer Institue
West Palm Beach, Florida, 33401, United States
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Pharmasite Research, Inc.
Baltimore, Maryland, 21208, United States
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Polyclinique De Blois
La Chaussée-Saint-Victor, 41260, France
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Preparaciones Oncológicas S.C.
León, Guanajuato, 37178, Mexico
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Puerto Rico Hematology/Oncology Group
Bayamón, PR, 00959, Puerto Rico
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Quincy Medical Group
Quincy, Illinois, 62301, United States
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Regional Budgetary Healthcare Institution 'Ivanovo Regional Oncology Dispensary'
Ivanovo, Ivanovo Oblast, 153040, Russia
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Rochester General Hospital
Rochester, New York, 14621, United States
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Rochester General Hospital
Rochester, New York, 14625, United States
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Roskilde Sygehus
Roskilde, 4000, Denmark
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S.C. MedisProf SRL
Cluj-Napoca, Cluj, 400058, Romania
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SMO Sarah Cannon Research Inst.
Nashville, Tennessee, 37203, United States
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Sagara Hospital
Kagoshima, 892-0833, Japan
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Saint-Petersburg City Clinical Oncology Dispensary
Saint Petersburg, Sankt-Peterburg, 198255, Russia
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Saitama Prefectural Cancer Center
Ina-machi, Saitama, 362-0806, Japan
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Samsung Medical Center
Seoul, Seoul-teukbyeolsi [Seoul], 6351, South Korea
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Sanford Research/USD
Sioux Falls, South Dakota, 57104, United States
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Seoul National University Bundang Hospital
Seongnam, Kyǒnggi-do, 13620, South Korea
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Seoul National University Hospital
Seoul, Seoul-teukbyeolsi [Seoul], 3080, South Korea
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Severance Hospital, Yonsei University Health System
Seoul, Seoul-teukbyeolsi [Seoul], 3722, South Korea
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Spital Thun
Thun, Canton of Bern, 3600, Switzerland
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St Lukes Hospital
Kansas City, Missouri, 64111, United States
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St Mary Regional Cancer Center
Walla Walla, Washington, 99362, United States
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St. Bernards Medical Center
Jonesboro, Arkansas, 72401, United States
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St. John of God Subiaco Hospital
Subiaco, Western Australia, 6008, Australia
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St. Marianna University School of Medicine Hospital
Kawasaki, Kanagawa, 216-8511, Japan
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Stanford University Clinic
Stanford, California, 94305, United States
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Taichung Veterans General Hospital
Taichung, 407, Taiwan
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Taipei Veterans General Hospital
Taipei, 11217, Taiwan
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Tampereen yliopistollinen sairaala
Tampere, Pirkanmaa, 33520, Finland
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Tecnologico de Monterrey
Monterrey, Nuevo León, 64710, Mexico
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The Boston Baskin Cancer Group
Memphis, Tennessee, 38120, United States
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The Catholic Univ. of Korea Seoul St. Mary's Hospital
Seoul, Seoul-teukbyeolsi [Seoul], 6591, South Korea
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Tokyo Met Cancer & Infectious Diseases Center Komagome Hp
Bunkyo-ku, Tokyo, 113-8677, Japan
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Tom Baker Cancer Center
Calgary, Alberta, T2N 4N2, Canada
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Turun Yliopistollinen Keskussairaala
Turku, 20520, Finland
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UZ Brussel
Brussels, Bruxelles-Capitale, Région de, 1090, Belgium
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UZ Leuven
Leuven, Vlaams-Brabant, 3000, Belgium
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Ulsan University Hospital
Ulsan, Ulsan-Kwangyǒkshi, 44033, South Korea
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Unity Health Toronto, St. Michael's Hospital
Toronto, Ontario, M5B 1W8, Canada
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Univ of California San Francisco
San Francisco, California, 94115, United States
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Universitaetsklinikum Tuebingen
Tübingen, Baden-Wurttemberg, 72076, Germany
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University Cancer & Blood Center, LLC
Athens, Georgia, 30607, United States
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University General Hospital of Heraklion
Heraklion, Krítí, 71110, Greece
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University Hospital of Patras
Pátrai, Achaḯa, 26504, Greece
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University of California - San Diego
La Jolla, California, 92037-0845, United States
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Universitätsspital Basel
Basel, Canton of Basel-City, 4031, Switzerland
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Uniwersyteckie Centrum Kliniczne
Gdansk, Pomeranian Voivodeship, 80-214, Poland
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Utah Cancer Specialists
Salt Lake City, Utah, 84106, United States
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Washington University Medical School
City of Saint Peters, Missouri, 63376, United States
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Washington University Medical School
Creve Coeur, Missouri, 63141, United States
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Washington University Medical School
St Louis, Missouri, 63110, United States
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Washington University Medical School
St Louis, Missouri, 63129, United States
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