Evidence map›Paper›PMID 41596540›Full record

ArticleInternational journal of molecular sciences2026

Simultaneous ManNAc and Neu5Ac Quantification in Human Sera by LC-MS/MS.

Gerardo N Guerrero-Flores, Fabio J Pacheco, Veronica L Martinez Marignac, Christopher C Perry, Guangyu Zhang, Martin L Mayta, Josef Voglmeir, Li Liu, Gary E Fraser, Fayth M Butler and 1 more

Abstract read
In one paragraph

Article in International journal of molecular sciences, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing 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

2 citing papers in PubMed.

  1. Article
  2. Article
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

11 authors.

Gerardo N Guerrero-FloresCentro Interdisciplinario de Investigaciones en Ciencias de la Salud y del Comportamiento (CIICSAC), Facultad de Ciencias de la Salud, Universidad Adventista del Plata, 25 de Mayo 99, Libertador San Martín 3103, Argentina.ORCID 0009-0003-8351-0144
Fabio J PachecoCentro Interdisciplinario de Investigaciones en Ciencias de la Salud y del Comportamiento (CIICSAC), Facultad de Ciencias de la Salud, Universidad Adventista del Plata, 25 de Mayo 99, Libertador San Martín 3103, Argentina.
Veronica L Martinez MarignacCentro de Investigación Científica y de Transferencia Tecnológica a la Producción (CICYTTP-CONICET), Diamante 3105, Argentina.ORCID 0000-0002-0486-7280
Christopher C PerryDivision of Biochemistry, Department of Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, CA 92350, USA.ORCID 0000-0002-4010-9815
Guangyu ZhangDivision of Biochemistry, Department of Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, CA 92350, USA.ORCID 0000-0003-1057-7746
Martin L MaytaCentro Interdisciplinario de Investigaciones en Ciencias de la Salud y del Comportamiento (CIICSAC), Facultad de Ciencias de la Salud, Universidad Adventista del Plata, 25 de Mayo 99, Libertador San Martín 3103, Argentina.ORCID 0000-0002-7986-4551
Josef VoglmeirGlycomics and Glycan Bioengineering Research Center (GGBRC), College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China.ORCID 0000-0002-4096-4926
Li LiuGlycomics and Glycan Bioengineering Research Center (GGBRC), College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China.
Gary E FraserCenter for Nutrition, Healthy Lifestyles and Disease Prevention, School of Public Health, Loma Linda University, Loma Linda, CA 92350, USA.
Fayth M ButlerCenter for Nutrition, Healthy Lifestyles and Disease Prevention, School of Public Health, Loma Linda University, Loma Linda, CA 92350, USA.
Danilo S BoskovicDivision of Biochemistry, Department of Basic Sciences, School of Medicine, Loma Linda University, Loma Linda, CA 92350, USA.ORCID 0000-0001-6919-3726

Funding

Loma Linda University GRASP #2170258Ministry of Science and Technology of Argentina RESOL-2018-2704-APN-DIR#CONICETUniversidad Adventista del Plata Research grant
6 · The paper itself

Abstract

N-Acetyl-D-mannosamine (ManNAc) and N-acetylneuraminic acid (Neu5Ac) are important components of glycosylation, affecting numerous physiologic processes. The effects of age, body mass index (BMI), race, or sex on serum levels of ManNAc and Neu5Ac are poorly understood. However, these associations are of substantial interest. Simultaneous quantification of ManNAc and Neu5Ac, using liquid chromatography tandem mass spectrometry (LC-MS/MS), was developed and validated for human serum samples. This method has high sensitivity, specificity, and reproducibility, with limits of detection as low as 1.02 ng/mL for ManNAc or 1.14 ng/mL for Neu5Ac. A set of 155 serum samples from the Adventist Health Study 2 (AHS-2) cohort was analyzed. Concentrations of conjugated Neu5Ac were 35.1 ± 9.4 µg/mL and 33.0 ± 9.5 µg/mL in black and white participants, respectively. Conjugated and total Neu5Ac levels were significantly higher in women, with

Indexed as

HexosaminesLiquid Chromatography-Mass SpectrometryN-Acetylneuraminic AcidTandem Mass SpectrometryAdultAgedChromatography, LiquidFemaleHumansMaleMiddle AgedReproducibility of ResultsHexosaminesN-acetylmannosamineN-Acetylneuraminic AcidageBMIdietethnicityLC-MS/MSManNAcNeu5Acsex

Identifiers

PMID41596540
PMCPMC12841319

What OpenQuestion holds

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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.