Evidence map›Paper›PMID 25505856›Full record

ArticleClinical proteomics2014

Absolute quantification of endogenous angiotensin II levels in human plasma using ESI-LC-MS/MS.

Anna Schulz, Joachim Jankowski, Walter Zidek, Vera Jankowski

Open access · goldAbstract read
In one paragraph

Article in Clinical proteomics, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 1 pooled it
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

19 citing papers in PubMed, 1 synthesis or guideline pooled it, 52 citations in OpenAlex.

  1. Direct Vascular Effects of Angiotensin II (A Systematic Short Review).International journal of molecular sciences · 2024
    Pooled it
  2. Article
  3. Article
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  5. The renin angiotensin aldosterone system.Pflugers Archiv : European journal of physiology · 2024
    Review
  6. Article
  7. Article
  8. Orthogonal Peptide-Templated Labeling Elucidates Lateral ETChembiochem : a European journal of chemical biology · 2022
    Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. A pressor dose of angiotensin II has no influence on the angiotensin-converting enzyme 2 and other molecules associated with SARS-CoV-2 infection in mice.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2021
    Article
  14. Article
  15. Endoplasmic Reticulum (ER) Stress in Part Mediates Effects of Angiotensin II in Pancreatic Beta Cells.Diabetes, metabolic syndrome and obesity : targets and therapy · 2020
    Article
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  19. Biochemical evaluation of the renin-angiotensin system: the good, bad, and absolute?American journal of physiology. Heart and circulatory physiology · 2016
    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 3 institutions in 1 country.

Anna SchulzInstitute for Molecular Cardiovascular Research (IMCAR), RWTH Aachen University, University Hospital, Pauwelsstrasse 30, D-52074 Aachen, Germany.
Joachim JankowskiInstitute for Molecular Cardiovascular Research (IMCAR), RWTH Aachen University, University Hospital, Pauwelsstrasse 30, D-52074 Aachen, Germany.
Walter ZidekCharité-Universitätsmedizin Berlin (CBF), Medizinische Klinik IV, Berlin, Germany.
Vera JankowskiInstitute for Molecular Cardiovascular Research (IMCAR), RWTH Aachen University, University Hospital, Pauwelsstrasse 30, D-52074 Aachen, Germany.
Universitätsklinikum Aachen · DECharité - Universitätsmedizin Berlin · DERWTH Aachen University · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAngiotensin II acts as a peptide hormone and component of renin-angiotensin- system (RAS) regulating the blood pressure, and seems to be involved in renal and vascular disorders. There is no reliable quantification method for angiotensin II available until now and the angiotensin II plasma levels described in the literature are correspondingly strongly divergent. Therefore, we developed and validated a sensitive, selective and reliable LC-ESI-MS/MS method for absolute quantification of angiotensin II concentration in human plasma based on the AQUA strategy.

methodsPlasma samples were extracted using MAX Oasis cartridges and were subjected to a further immunoaffinity-purification using immobilized anti-angiotensin II antibodies in order to isolate endogenous angiotensin II. Stable isotope ((13)C- and (15) N-) labeled angiotensin II was used as an internal standard. The fractionated samples were analysed using LC-ESI-MS/MS.

resultsThe calibration curve was established in plasma in the concentration range 6-240 pM (r(2) > 0.999). The developed and validated method was successfully applied for quantification of endogenous angiotensin II in human plasma of healthy volunteers and chronic kidney disease (CKD-5D) patients. The mean plasma angiotensin II levels were found to be 18.4 ± 3.3 pM in healthy subjects and 64.5 ± 32.4 pM in CKD-5D patients (each n =9).

conclusionThe LC-ESI-MS/MS-based method for quantification of angiotensin II levels in human plasma was successfully evaluated within the study. This method is applicable for clinical applications aiming at the validation of the impact of highly physiologically and pathophysiologically active angiotensin II.

Identifiers

PMID25505856
PMCPMC4223748
OpenAlexW2121606467

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LicenceCC BY
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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.