Evidence map›Paper›PMID 22340302›Full record

ArticleBMC research notes2012

Evaluation of suitable reference genes for gene expression studies in porcine alveolar macrophages in response to LPS and LTA.

Mehmet Ulas Cinar, Mohammad Ariful Islam, Muhammad Jasim Uddin, Ernst Tholen, Dawit Tesfaye, Christian Looft, Karl Schellander

Open access · goldAbstract read
In one paragraph

Article in BMC research notes, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
2.3field-weighted citation impact, top 11% 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

23 citing papers in PubMed, 55 citations in OpenAlex.

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  8. Canadian journal of veterinary research = Revue canadienne de recherche veterinaire · 2022
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  12. Dietary arachidonate in milk replacer triggers dual benefits of PGEJournal of animal science and biotechnology · 2019
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  15. Article
  16. Article
  17. Article
  18. Current transcriptomics in pig immunity research.Mammalian genome : official journal of the International Mammalian Genome Society · 2015
    Review
  19. Article
  20. 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

7 authors at 2 institutions in 2 countries.

Mehmet Ulas CinarInstitute of Animal Sciences, Unit of Animal Breeding and Husbandry, University of Bonn, Endenicher Allee 15, 53115 Bonn, Germany.
Mohammad Ariful Islam
Muhammad Jasim Uddin
Ernst Tholen
Dawit Tesfaye
Christian Looft
Karl Schellander
University of Bonn · DEBangladesh Agricultural University · BD

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundTo obtain reliable quantitative real-time PCR data, normalization relative to stable housekeeping genes (HKGs) is required. However, in practice, expression levels of 'typical' housekeeping genes have been found to vary between tissues and under different experimental conditions. To date, validation studies of reference genes in pigs are relatively rare and have never been performed in porcine alveolar macrophages (AMs). In this study, expression stability of putative housekeeping genes were identified in the porcine AMs in response to the stimulation with two pathogen-associated molecular patterns (PAMPs) lipopolysaccharide (LPS) and lipoteichoic acid (LTA). Three different algorithms (geNorm, Normfinder and BestKeeper) were applied to assess the stability of HKGs.

resultsThe mRNA expression stability of nine commonly used reference genes (B2M, BLM, GAPDH, HPRT1, PPIA, RPL4, SDHA, TBP and YWHAZ) was determined by qRT-PCR in AMs that were stimulated by LPS and LTA in vitro. mRNA expression levels of all genes were found to be affected by the type of stimulation and duration of the stimulation (P < 0.0001). geNorm software revealed that SDHA, B2M and RPL4 showed a high expression stability in the irrespective to the stimulation group, while SDHA, YWHAZ and RPL4 showed high stability in non-stimulated control group. In all cases, GAPDH showed the least stability in geNorm. NormFinder revealed that SDHA was the most stable gene in all the groups. Moreover, geNorm software suggested that the geometric mean of the three most stable genes would be the suitable combination for accurate normalization of gene expression study.

conclusionsThere was discrepancy in the ranking order of reference genes obtained by different analysing algorithms. In conclusion, the geometric mean of the SDHA, YWHAZ and RPL4 seemed to be the most appropriate combination of HKGs for accurate normalization of gene expression data in porcine AMs without knowing the type of bacterial pathogenic status of the animals.

Indexed as

Genes, Essential14-3-3 ProteinsAlgorithmsAnimalsGene ExpressionGene Expression ProfilingLipopolysaccharidesMacrophage ActivationMacrophages, AlveolarReal-Time Polymerase Chain ReactionReference StandardsRibosomal ProteinsRNA, MessengerRNA StabilitySuccinate DehydrogenaseSwine14-3-3 ProteinsLipopolysaccharideslipoteichoic acidribosomal protein L4Ribosomal ProteinsRNA, MessengerSuccinate DehydrogenaseTeichoic Acids

Identifiers

PMID22340302
PMCPMC3306271
OpenAlexW2134651944

What OpenQuestion holds

Textmetadata
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 OpenQuestion graph.