Evidence map›Paper›PMID 23537953›Full record

ArticleCirculation. Cardiovascular imaging2013

Fluorescence tomography of rapamycin-induced autophagy and cardioprotection in vivo.

Howard H Chen, Choukri Mekkaoui, Hoonsung Cho, Soeun Ngoy, Brett Marinelli, Peter Waterman, Matthias Nahrendorf, Ronglih Liao, Lee Josephson, David E Sosnovik

Open access · greenAbstract read
In one paragraph

Article in Circulation. Cardiovascular imaging, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
2.6field-weighted citation impact, top 10% 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

21 citing papers in PubMed, 37 citations in OpenAlex.

  1. Article
  2. Review
  3. Autophagy genes in biology and disease.Nature reviews. Genetics · 2023
    Review
  4. Regulation of autophagy of the heart in ischemia and reperfusion.Apoptosis : an international journal on programmed cell death · 2023
    Review
  5. Article
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  19. Review
  20. Autophagy in cardiovascular biology.The Journal of clinical investigation · 2015
    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

10 authors at 1 institution in 2 countries.

Howard H ChenMartinos Center for Biomedical Imaging, Center for Molecular Imaging Research, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
Choukri Mekkaoui
Hoonsung Cho
Soeun Ngoy
Brett Marinelli
Peter Waterman
Matthias Nahrendorf
Ronglih Liao
Lee Josephson
David E Sosnovik
Brigham and Women's Hospital · US

Funding

ULTRAHIGH FIELD TECHNOLOGY FOR FUNCTIONAL IMAGINGP41RR014075 · NCRR · MASSACHUSETTS GENERAL HOSPITAL · PI ROSEN, BRUCE R · 1999 to 2011
$16.4M
Molecular and Microstructural Imaging of Cardiomyocyte Apoptosis and AutophagyR01HL093038 · NHLBI · MASSACHUSETTS GENERAL HOSPITAL · PI SOSNOVIK, DAVID E · 2008 to 2012
$2.2M
Multimodal Vital Fluorochromes for ImagingR01EB011996 · NIBIB · MASSACHUSETTS GENERAL HOSPITAL · PI JOSEPHSON, LEE · 2010 to 2013
$1.4M
NCRR NIH HHS P41 RR014075NCRR NIH HHS P41RR14075NHLBI NIH HHS R01 HL093038NIBIB NIH HHS R01 EB011996
6 · The paper itself

Abstract

backgroundAutophagy is a biological process during which cells digest organelles in their cytoplasm and recycle the constituents. The impact of autophagy in the heart, however, remains unclear in part because of the inability to noninvasively image this process in living animals. METHODS AND

resultsHere, we report the use of fluorescence molecular tomography and a cathepsin-activatable fluorochrome to image autophagy in the heart in vivo after ischemia/reperfusion and rapamycin (RAP) therapy. We show that cathepsin-B activity in the lysosome is upregulated by RAP and that this allows the expanded lysosomal compartment in autophagy to be imaged in vivo with fluorescence molecular tomography. We further demonstrate that the delivery of diagnostic nanoparticles to the lysosome by endocytosis is enhanced during autophagy. The upregulation of autophagy by RAP was associated with a 23% reduction (P<0.05) of apoptosis in the area at risk and a 45% reduction in final infarct size (19.6±5.6% of area at risk with RAP versus 35.9±9.1% of area at risk without RAP; P<0.05).

conclusionsThe ability to perform noninvasive tomographic imaging of autophagy in the heart has the potential to provide valuable insights into the pathophysiology of autophagy, particularly its role in cardiomyocyte salvage. Although additional data are needed, our study supports the investigation of RAP therapy in patients with acute coronary syndromes.

Indexed as

AnimalsApoptosisAutophagyCardiovascular AgentsCathepsin BDisease Models, AnimalEnzyme ActivationFemaleFluorescent DyesIschemic PostconditioningLysosomesMiceMice, Inbred C57BLMicroscopy, ConfocalMicrospheresMyocardial InfarctionCardiovascular AgentsCathepsin BCtsb protein, mouseFluorescent DyesSirolimusapoptosisautophagymolecular imagingmyocardiumrapamycin

Identifiers

PMID23537953
PMCPMC3805276
OpenAlexW2107013703

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.