Evidence map›Paper›PMID 35650291›Full record

ArticleScientific reports2022

A method for lipoprotein (a) Isolation from a small volume of plasma with applications for clinical research.

Paul A Mueller, Elisabeth Yerkes, Paige Bergstrom, Sara Rosario, Joshua Hay, Nathalie Pamir

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
2.2field-weighted citation impact, top 13% 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

6 citing papers in PubMed, 11 citations in OpenAlex.

  1. Article
  2. Article
  3. Deciphering Acute Coronary Syndromes Pathobiology Through Proteomics.Journal of cardiovascular development and disease · 2025
    Review
  4. Article
  5. Review
  6. 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

6 authors at 1 institution in 1 country.

Paul A MuellerCenter for Preventive Cardiology, Knight Cardiovascular Institute, Oregon Health & Science University, 3161 SW Pavilion Loop, Mail Code UHN62, Portland, OR, 97239, USA.
Elisabeth YerkesCenter for Preventive Cardiology, Knight Cardiovascular Institute, Oregon Health & Science University, 3161 SW Pavilion Loop, Mail Code UHN62, Portland, OR, 97239, USA.
Paige BergstromCenter for Preventive Cardiology, Knight Cardiovascular Institute, Oregon Health & Science University, 3161 SW Pavilion Loop, Mail Code UHN62, Portland, OR, 97239, USA.
Sara RosarioCenter for Preventive Cardiology, Knight Cardiovascular Institute, Oregon Health & Science University, 3161 SW Pavilion Loop, Mail Code UHN62, Portland, OR, 97239, USA.
Joshua HayCenter for Preventive Cardiology, Knight Cardiovascular Institute, Oregon Health & Science University, 3161 SW Pavilion Loop, Mail Code UHN62, Portland, OR, 97239, USA.
Nathalie PamirCenter for Preventive Cardiology, Knight Cardiovascular Institute, Oregon Health & Science University, 3161 SW Pavilion Loop, Mail Code UHN62, Portland, OR, 97239, USA. pamir@ohsu.edu.
Oregon Health & Science University · US

Funding

Functional and structural correlates of PCSK9 association with lipoproteinsR01HL132985 · NHLBI · OREGON HEALTH & SCIENCE UNIVERSITY · PI PAMIR, NATHALIE · 2016 to 2024
$4.2M
Identification of the role of HDL function in human cardiovascular disease through proteomics and geneticsR01HL136373 · NHLBI · OREGON HEALTH & SCIENCE UNIVERSITY · PI PAMIR, NATHALIE · 2018 to 2022
$2.4M
NHLBI NIH HHS R01 HL132985NHLBI NIH HHS R01 HL136373NIH HHS 5R01HL132985NIH HHS 5R01HL136373
6 · The paper itself

Abstract

High levels of circulating Lipoprotein (a) [Lp(a)] are an independent risk factor for CVD. One of the major limitations to investigating Lp(a) biology is the need for large volumes of plasma (4-10 mL) for its isolation. We developed an isolation technique requiring only 0.4 mL of plasma yielding an enriched Lp(a) fraction suitable for compositional and functional studies. We collected plasma from patients (n = 9) in EDTA presenting to our Center for Preventive Cardiology for CVD risk management and with circulating Lp(a) > 66 mg/dL. 0.4 mL of plasma was added to 90 µL of potassium bromide (1.33 g/mL) and subjected to our two-step density-gradient ultracentrifugation method. The first step separates VLDL and LDL from the Lp(a) and HDL fractions and the second step further separates VLDL from LDL and Lp(a) from HDL. Lp(a) is then dialyzed for up to 24 h in potassium phosphate buffer. We performed cholesterol gel electrophoresis, immunoblotting and LC-MS/MS proteomics on isolated lipoprotein fractions to confirm fraction enrichment. Functional studies including Lp(a)-dependent induction of macrophage gene expression and cholesterol efflux inhibition were performed on isolated Lp(a) to confirm its preserved bioactivity. Lp(a) yields (264 ± 82.3 µg/mL on average) correlated with Lp(a) plasma concentrations (r

Indexed as

Cardiovascular DiseasesLipoprotein(a)CholesterolChromatography, LiquidHEK293 CellsHumansProteomicsTandem Mass SpectrometryCholesterolLipoprotein(a)

Identifiers

PMID35650291
PMCPMC9160242
OpenAlexW4281663248

What Socratic holds

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LicenceCC BY
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 Socratic graph.