Evidence map›Paper›PMID 30607633›Full record

ArticleBreast cancer research and treatment2019

Synergistic anti-cancer activity of CDK4/6 inhibitor palbociclib and dual mTOR kinase inhibitor MLN0128 in pRb-expressing ER-negative breast cancer.

Takuro Yamamoto, Noriko Kanaya, George Somlo, Shiuan Chen

Abstract read
In one paragraph

Article in Breast cancer research and treatment, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 43 papers.

0numbers the graph read from it
0cells of the map it votes in
43citing papers in PubMed
7.1field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

43 citing papers in PubMed, 60 citations in OpenAlex.

  1. Article
  2. Review
  3. Establishment of matched bladder cancer PDX and PDX-derived organoid model and evaluation of anti-tumor efficacy of abemaciclib.Clinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico · 2025
    Article
  4. Review
  5. Review
  6. Article
  7. Article
  8. Article
  9. Review
  10. Review
  11. Article
  12. Review
  13. Article
  14. Review
  15. Review
  16. Article
  17. Article
  18. Article
  19. Article
  20. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors at 2 institutions in 1 country.

Takuro YamamotoDepartment of Cancer Biology, Beckman Research Institute of City of Hope, Duarte, CA, 91010, USA.
Noriko KanayaDepartment of Cancer Biology, Beckman Research Institute of City of Hope, Duarte, CA, 91010, USA.
George SomloDepartment of Medical Oncology, City of Hope Medical Center, Duarte, CA, 91010, USA.
Shiuan ChenDepartment of Cancer Biology, Beckman Research Institute of City of Hope, Duarte, CA, 91010, USA. Schen@coh.org.ORCID http://orcid.org/0000-0002-4482-6926
City of Hope · USCity Of Hope National Medical Center · US

Funding

Transgenic Mouse FacilityP30CA033572 · NCI · CITY OF HOPE/BECKMAN RESEARCH INSTITUTE · PI STANLEY R. HAMILTON · 1985 to 2026
$86.3M
National Cancer Institute P30CA033572NCI NIH HHS P30 CA033572
6 · The paper itself

Abstract

purposePalbociclib is an approved cyclin-dependent kinase (CDK) 4/6 inhibitor for treatment of patients with ER-positive and HER2-negative breast cancers. While Retinoblastoma protein (pRb), a major substrate of CDK4/6, is a potential target in triple negative breast cancer (TNBC), the usefulness of CDK4/6 inhibitors in this cancer has not been established. This preclinical study investigated the combination effects of palbociclib and the dual mammalian target of rapamycin (mTOR) kinase inhibitor MLN0128 in estrogen receptor (ER)-negative breast cancer in vitro and in vivo.

methodsThe combined effects of two drugs on three TNBC cell lines (MB231, MB468, and CAL148) and an ER-negative and HER2-positive cell line (MB453) were investigated by MTT assay and colony formation analysis. Cell cycle measurements were examined as well as changes in expression of molecules related to G1/S transition and the mTOR pathway. Importantly, a pRb-expressing TNBC patient-derived xenograft (PDX) model was used to assess the effects of the combination in vivo.

resultsA combination of palbociclib and MLN0128 synergistically inhibited the proliferation of pRb-expressing cell lines and induced G1 cell cycle arrest. Western blot analysis revealed that CDK4/6-pRb and mTOR pathways were inhibited by these treatments. In pRb-expressing TNBC PDX, the combination treatment drastically suppressed tumor growth compared to either the control or single drug treatments. In addition, the combination treatment significantly reduced the number of Ki67-positive cells.

conclusionsWe revealed that palbociclib and MLN0128 had synergistic anti-cancer activity in both pRb + ER-negative cell lines and a TNBC PDX model. Our results indicate that such combination therapy is worthy of further investigation in a clinical setting.

Indexed as

AdenineAnimalsAntineoplastic Combined Chemotherapy ProtocolsBenzoxazolesBreast NeoplasmsCell CycleCell Line, TumorCell ProliferationCell SurvivalDrug SynergismFemaleHumansMicePiperazinesProtein Kinase InhibitorsPyridinesAdenineBenzoxazolespalbociclibPiperazinesProtein Kinase InhibitorsPyridinesPyrimidinesReceptors, EstrogenRetinoblastoma ProteinsapanisertibCDK 4/6 inhibitorMLN0128mTOR inhibitorPalbociclibRetinoblastoma protein (pRb)Triple negative breast cancer (TNBC)

Identifiers

PMID30607633
PMCPMC6452902
OpenAlexW2908069836

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.