Evidence map›Paper›PMID 25638774›Full record

ArticleRedox biology2015

Induction of heme oxygenase-1 contributes to survival of Mycobacterium abscessus in human macrophages-like THP-1 cells.

Maher Y Abdalla, Iman M Ahmad, Barbara Switzer, Bradley E Britigan

Open access · goldAbstract read
In one paragraph

Article in Redox biology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 39 papers.

0numbers the graph read from it
0cells of the map it votes in
39citing papers in PubMed
2.9field-weighted citation impact, top 9% 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

39 citing papers in PubMed, 58 citations in OpenAlex.

  1. Article
  2. Ouabain alleviatesFrontiers in immunology · 2025
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  5. Isoegomaketone exhibits potential as a newFrontiers in microbiology · 2024
    Article
  6. Molecular Identification of Strains within thePolish journal of microbiology · 2023
    Article
  7. Article
  8. Article
  9. Review
  10. Heme Oxygenase/Carbon Monoxide Participates in the Regulation ofInternational journal of molecular sciences · 2022
    Article
  11. Review
  12. Article
  13. Pathomechanisms of Immunological Disturbances in β-Thalassemia.International journal of molecular sciences · 2021
    Review
  14. Nrf2 Activation Attenuates Acrylamide-Induced Neuropathy in Mice.International journal of molecular sciences · 2021
    Article
  15. Article
  16. Article
  17. Review
  18. Review
  19. Review
  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

4 authors at 2 institutions in 1 country.

Maher Y AbdallaResearch Service, VA Medical Center-Omaha Nebraska Western Iowa, Omaha, NE 68105, USA; Department of Pathology and Microbiology, University of Nebraska Medical Center College of Medicine, Omaha, NE 68198, USA; Department of Internal Medicine, University of Nebraska Medical Center College of Medicine, Omaha, NE 68198, USA. Electronic address: maher.abdalla@unmc.edu.
Iman M AhmadSchool of Allied Health Professions, University of Nebraska Medical Center College of Medicine, Omaha, NE 68198, USA.
Barbara SwitzerResearch Service, VA Medical Center-Omaha Nebraska Western Iowa, Omaha, NE 68105, USA; Department of Internal Medicine, University of Nebraska Medical Center College of Medicine, Omaha, NE 68198, USA.
Bradley E BritiganResearch Service, VA Medical Center-Omaha Nebraska Western Iowa, Omaha, NE 68105, USA; Department of Pathology and Microbiology, University of Nebraska Medical Center College of Medicine, Omaha, NE 68198, USA; Department of Internal Medicine, University of Nebraska Medical Center College of Medicine, Omaha, NE 68198, USA.
Omaha VA Medical Center · USUniversity of Nebraska Medical Center · US

Funding

Redox Biology CenterP30GM103335 · NIGMS · UNIVERSITY OF NEBRASKA LINCOLN · PI BECKER, DONALD F · 2012 to 2016
$4.3M
Development of Gallium-Based Therapies for Pulmonary Mycobacterial InfectionsI01BX002504 · VA · OMAHA VA MEDICAL CENTER · PI BRITIGAN, BRADLEY E · 2015 to 2018
–
BLRD VA I01 BX002504NIGMS NIH HHS P30 GM103335NIGMS NIH HHS P30GM103335
6 · The paper itself

Abstract

Mycobacterium abscessus (M.abs) is a rapidly growing mycobacterial species that infects macrophages, and is an important pathogen in patients with cystic fibrosis. We studied the early stages of M.abs infection of macrophages, with emphasis on the role of heme-oxygenase-1 (HO-1) in this infection. THP-1 cells were activated using TPA into macrophage-like cells and infected with M.abs for different time points. M.abs infection robustly induced HO-1 expression in the THP-1 cells. Production of HO-1 was p38 MAPK-dependent, as p38 inhibitors suppressed HO-1 induction. Pretreatment with HO-1 inhibitors tin-protoporphyrin (SnPP) significantly inhibited M.abs growth inside macrophages. Furthermore, inhibiting HO-1 using HO-1 siRNA or the HO-1 upstream signaling molecule; Nrf2 using Nrf2 siRNA resulted in similar inhibition of M.abs. In contrast, inducing HO-1 did not increase M.abs intracellular growth above control. Products of HO-1 metabolism of heme are bilirubin, biliverdin, carbon monoxide (CO) and iron. The addition of either bilirubin or biliverdin, but not CO, completely restored the SnPP inhibitory effect and partially that with HO-1 siRNA. To understand the mechanisms, we used Syto-62 labeled M.abs to infect macrophages. Interestingly, HO-1 inhibition promoted M.abs-containing phagosome fusion with lysosomes, which should enhance M.abs killing. M.abs infection enhanced THP-1 ROS production as demonstrated by increased DHE, DCF fluorescence, and EPR signal. HO-1 inhibition further increased ROS production in infected macrophages. Our results indicate that HO-1 induction is important for M.abs growth during the early stages of infection, and that the HO-1 products bilirubin and biliverdin, perhaps through modulation of intracellular ROS levels, may be involved.

Indexed as

Host-Pathogen InteractionsBilirubinBiliverdineCell Line, TumorEnzyme ActivationGene Expression RegulationHeme Oxygenase-1HumansLysosomesMacrophage ActivationMacrophagesMembrane FusionMetalloporphyrinsMicrobial ViabilityMycobacteriumNF-E2-Related Factor 2BilirubinBiliverdineHeme Oxygenase-1MetalloporphyrinsNFE2L2 protein, humanNF-E2-Related Factor 2p38 Mitogen-Activated Protein KinasesProtein Kinase InhibitorsProtoporphyrinsReactive Oxygen SpeciesRNA, Small InterferingTetradecanoylphorbol Acetatetin protoporphyrin IXHO-1Mycobacterium abscessusOxidative stressTHP-1 cells

Identifiers

PMID25638774
PMCPMC4326180
OpenAlexW2001198308

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.