Evidence map›Paper›PMID 21389100›Full record

ArticleClinical cancer research : an official journal of the American Association for Cancer Research2011

MK-1775, a potent Wee1 inhibitor, synergizes with gemcitabine to achieve tumor regressions, selectively in p53-deficient pancreatic cancer xenografts.

N V Rajeshkumar, Elizabeth De Oliveira, Niki Ottenhof, James Watters, David Brooks, Tim Demuth, Stuart D Shumway, Shinji Mizuarai, Hiroshi Hirai, Anirban Maitra and 1 more

Abstract read
In one paragraph

Article in Clinical cancer research : an official journal of the American Association for Cancer Research, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 171 papers.

0numbers the graph read from it
0cells of the map it votes in
171citing papers in PubMed
–field-weighted citation impact
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

171 citing papers in PubMed.

  1. Trial
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  3. Inhibition of WEE1 Is Effective inJournal of clinical oncology : official journal of the American Society of Clinical Oncology · 2021
    Trial
  4. Trial
  5. Trial
  6. Article
  7. Article
  8. Article
  9. Article
  10. Review
  11. Article
  12. Review
  13. Targeting WEE1 Kinase for Breast Cancer Therapeutics: An Update.International journal of molecular sciences · 2025
    Review
  14. Article
  15. Article
  16. Review
  17. Article
  18. Review
  19. Review
  20. Article

111 more citing papers are in PubMed but not listed here.

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

11 authors.

N V RajeshkumarDepartment of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA. rnv1@jhmi.edu
Elizabeth De Oliveira
Niki Ottenhof
James Watters
David Brooks
Tim Demuth
Stuart D Shumway
Shinji Mizuarai
Hiroshi Hirai
Anirban Maitra
Manuel Hidalgo

Funding

Hedgehog Inhibitors in Pancreas CancerR01CA113669 · NCI · UNIVERSITY OF TX MD ANDERSON CAN CTR · PI MAITRA, ANIRBAN · 2005 to 2014
$3.1M
Individualized Treatment of Pancreatic CancerR01CA116554 · NCI · SPANISH NATIONAL CANCER CENTER · PI HIDALGO, MANUEL · 2006 to 2010
$1.3M
Tailoring New Drugs in Pancreatic CancerR01CA129963 · NCI · SPANISH NATIONAL CANCER CENTER · PI HIDALGO, MANUEL · 2007 to 2011
$1.2M
NCI NIH HHS CA116554NCI NIH HHS CA129963NCI NIH HHS R01 CA113669NCI NIH HHS R01 CA116554NCI NIH HHS R01 CA129963
6 · The paper itself

Abstract

purposeInvestigate the efficacy and pharmacodynamic effects of MK-1775, a potent Wee1 inhibitor, in both monotherapy and in combination with gemcitabine (GEM) using a panel of p53-deficient and p53 wild-type human pancreatic cancer xenografts. EXPERIMENTAL

designNine individual patient-derived pancreatic cancer xenografts (6 with p53-deficient and 3 with p53 wild-type status) from the PancXenoBank collection at Johns Hopkins were treated with MK-1775, GEM, or GEM followed 24 hour later by MK-1775, for 4 weeks. Tumor growth rate/regressions were calculated on day 28. Target modulation was assessed by Western blotting and immunohistochemistry.

resultsMK-1775 treatment led to the inhibition of Wee1 kinase and reduced inhibitory phosphorylation of its substrate Cdc2. MK-1775, when dosed with GEM, abrogated the checkpoint arrest to promote mitotic entry and facilitated tumor cell death as compared to control and GEM-treated tumors. MK-1775 monotherapy did not induce tumor regressions. However, the combination of GEM with MK-1775 produced robust antitumor activity and remarkably enhanced tumor regression response (4.01-fold) compared to GEM treatment in p53-deficient tumors. Tumor regrowth curves plotted after the drug treatment period suggest that the effect of the combination therapy is longer-lasting than that of GEM. None of the agents produced tumor regressions in p53 wild-type xenografts.

conclusionsThese results indicate that MK-1775 selectively synergizes with GEM to achieve tumor regressions, selectively in p53-deficient pancreatic cancer xenografts.

Indexed as

AnimalsAntineoplastic Combined Chemotherapy ProtocolsCarcinoma, Pancreatic DuctalCell Cycle ProteinsCell Line, TumorDeoxycytidineDisease ProgressionDrug SynergismFemaleGemcitabineGenes, p53HumansMiceMice, NudeMutationNeoplasmsadavosertibCell Cycle ProteinsDeoxycytidineGemcitabineNuclear ProteinsProtein Kinase InhibitorsProtein-Tyrosine KinasesPyrazolesPyrimidinesPyrimidinonesWEE1 protein, human

Identifiers

PMID21389100
PMCPMC3307341

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Registered trials

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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.