Evidence map›Paper›PMID 21458422›Full record

ArticleBiochemical pharmacology2011

The synthetic bryostatin analog Merle 23 dissects distinct mechanisms of bryostatin activity in the LNCaP human prostate cancer cell line.

Noemi Kedei, Andrea Telek, Alexandra Czap, Emanuel S Lubart, Gabriella Czifra, Dazhi Yang, Jinqiu Chen, Tyler Morrison, Paul K Goldsmith, Langston Lim and 6 more

Abstract read
In one paragraph

Article in Biochemical pharmacology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing 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

23 citing papers in PubMed.

  1. A Phase II Trial of AZD6244 (Selumetinib, ARRY-142886), an Oral MEK1/2 Inhibitor, in Relapsed/Refractory Multiple Myeloma.Clinical cancer research : an official journal of the American Association for Cancer Research · 2016
    Trial
  2. Article
  3. Article
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  5. Article
  6. Synthesis and Biological Evaluation of Fluorescent Bryostatin Analogues.Chembiochem : a European journal of chemical biology · 2018
    Article
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  12. Article
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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

16 authors.

Noemi KedeiLaboratory of Cancer Biology and Genetics, Center for Cancer Research, National Cancer Institute, Bethesda, MD 20892, USA.
Andrea Telek
Alexandra Czap
Emanuel S Lubart
Gabriella Czifra
Dazhi Yang
Jinqiu Chen
Tyler Morrison
Paul K Goldsmith
Langston Lim
Poonam Mannan
Susan H Garfield
Matthew B Kraft
Wei Li
Gary E Keck
Peter M Blumberg

Funding

Molecular Mechanism of Action of Phorbol EsterZIABC005270 · NCI · DIVISION OF BASIC SCIENCES - NCI · PI BLUMBERG, PETER · 2009 to 2018
$18.4M
CCR Microscopy CoreZICBC010858 · NCI · DIVISION OF BASIC SCIENCES - NCI · PI KRUHLAK, MICHAEL · 2009 to 2025
$14.8M
CHIRAL APPROACHES TO NATURAL PRODUCT SYNTHESISR01GM028961 · NIGMS · UNIVERSITY OF UTAH · PI KECK, GARY E · 1985 to 2014
$5.5M
MOLECULAR MECHANISM OF ACTION OF PHORBOL ESTER TUMOR PROMOTERSZ01BC005270 · NCI · DIVISION OF BASIC SCIENCES - NCI · PI BLUMBERG, PETER · 1996 to 2008
$4.3M
Intramural NIH HHS Z01 BC005270Intramural NIH HHS ZIA BC005270NIGMS NIH HHS GM28961NIGMS NIH HHS R01 GM028961
6 · The paper itself

Abstract

Bryostatin 1 has attracted considerable attention both as a cancer chemotherapeutic agent and for its unique activity. Although it functions, like phorbol esters, as a potent protein kinase C (PKC) activator, it paradoxically antagonizes many phorbol ester responses in cells. Because of its complex structure, little is known of its structure-function relations. Merle 23 is a synthetic derivative, differing from bryostatin 1 at only four positions. However, in U-937 human leukemia cells, Merle 23 behaves like a phorbol ester and not like bryostatin 1. Here, we characterize the behavior of Merle 23 in the human prostate cancer cell line LNCaP. In this system, bryostatin 1 and phorbol ester have contrasting activities, with the phorbol ester but not bryostatin 1 blocking cell proliferation or tumor necrosis factor alpha secretion, among other responses. We show that Merle 23 displays a highly complex pattern of activity in this system. Depending on the specific biological response or mechanistic change, it was bryostatin-like, phorbol ester-like, intermediate in its behavior, or more effective than either. The pattern of response, moreover, varied depending on the conditions. We conclude that the newly emerging bryostatin derivatives such as Merle 23 provide powerful tools to dissect subsets of bryostatin mechanism and response.

Indexed as

ApoptosisBryostatinsCell DivisionCell Line, TumorDown-RegulationHumansMalePhosphorylationProstatic NeoplasmsProtein Kinase CSubcellular FractionsTetradecanoylphorbol AcetateTumor Necrosis Factor-alphaU937 Cellsbryostatin 1BryostatinsMerle 23Protein Kinase CTetradecanoylphorbol AcetateTumor Necrosis Factor-alpha

Identifiers

PMID21458422
PMCPMC3089703

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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.