Evidence map›Paper›PMID 22836527›Full record

Trial reportJournal of bioenergetics and biomembranes2012

Metabolic control analysis of cellular respiration in situ in intraoperational samples of human breast cancer.

Tuuli Kaambre, Vladimir Chekulayev, Igor Shevchuk, Minna Karu-Varikmaa, Natalja Timohhina, Kersti Tepp, Jelena Bogovskaja, Riina Kütner, Vahur Valvere, Valdur Saks

Abstract readClinical Trial
PubMed Publisher
In one paragraph

Trial report in Journal of bioenergetics and biomembranes, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
2.0field-weighted citation impact, top 14% 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

26 citing papers in PubMed, 49 citations in OpenAlex.

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  9. Reverse Warburg Effect-Related Mitochondrial Activity andNuclear medicine and molecular imaging · 2019
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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

10 authors at 3 institutions in 2 countries.

Tuuli KaambreLaboratory of Bioenergetics, National Institute of Chemical Physics and Biophysics, Estonia. tuuli.kaambre@kbfi.ee
Vladimir Chekulayev
Igor Shevchuk
Minna Karu-Varikmaa
Natalja Timohhina
Kersti Tepp
Jelena Bogovskaja
Riina Kütner
Vahur Valvere
Valdur Saks
National Institute of Chemical Physics and Biophysics · EENorth Estonia Medical Centre · EETallinn University of Technology · EE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The aim of this study was to analyze quantitatively cellular respiration in intraoperational tissue samples taken from human breast cancer (BC) patients. We used oxygraphy and the permeabilized cell techniques in combination with Metabolic Control Analysis (MCA) to measure a corresponding flux control coefficient (FCC). The activity of all components of ATP synthasome, and respiratory chain complexes was found to be significantly increased in human BC cells in situ as compared to the adjacent control tissue. FCC(s) were determined upon direct activation of respiration with exogenously-added ADP and by titrating the complexes with their specific inhibitors to stepwise decrease their activity. MCA showed very high sensitivity of all complexes and carriers studied in human BC cells to inhibition as compared to mitochondria in normal oxidative tissues. The sum of FCC(s) for all ATP synthasome and respiratory chain components was found to be around 4, and the value exceeded significantly that for normal tissue (close to 1). In BC cells, the key sites of the regulation of respiration are Complex IV (FCC = 0.74), ATP synthase (FCC = 0.61), and phosphate carrier (FCC = 0.60); these FCC(s) exceed considerably (~10-fold) those for normal oxidative tissues. In human BC cells, the outer mitochondrial membrane is characterized by an increased permeability towards adenine nucleotides, the mean value of the apparent K(m) for ADP being equal to 114.8 ± 13.6 μM. Our data support the two-compartment hypothesis of tumor metabolism, the high sum of FCC(s) showing structural and functional organization of mitochondrial respiratory chain and ATP synthasome as supercomplexes in human BC.

Indexed as

Oxygen ConsumptionAdenosine TriphosphateAgedBreast NeoplasmsElectron TransportElectron Transport Chain Complex ProteinsFemaleHumansMaleMiddle AgedMitochondriaNeoplasm ProteinsAdenosine TriphosphateElectron Transport Chain Complex ProteinsNeoplasm Proteins

Identifiers

PMID22836527
OpenAlexW1979119227

What OpenQuestion holds

Textmetadata
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.