Evidence map›Paper›PMID 33308936›Full record

ArticleMedical hypotheses2021

Alveolar epithelial cell type II as main target of SARS-CoV-2 virus and COVID-19 development via NF-Kb pathway deregulation: A physio-pathological theory.

Maurizio Carcaterra, Cristina Caruso

Open access · greenAbstract read
In one paragraph

Article in Medical hypotheses, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 79 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
79citing papers in PubMed, 2 pooled it
2.1field-weighted citation impact, top 7% 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

79 citing papers in PubMed, 2 syntheses or guidelines pooled it, 122 citations in OpenAlex.

  1. Pooled it
  2. Mucosal immune response in biology, disease prevention and treatment.Signal transduction and targeted therapy · 2025
    Pooled it
  3. Review
  4. Article
  5. Review
  6. Single-Cell Insights Into Macrophage Subtypes in Pulmonary Infections.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026
    Review
  7. Review
  8. Review
  9. SARS-CoV-2 nsp15 enhances viral virulence by subverting host antiviral defenses.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  10. Article
  11. Flow mechanisms of the air-blood barrier.PLoS computational biology · 2025
    Article
  12. Article
  13. Review
  14. Article
  15. Review
  16. Article
  17. Review
  18. Article
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  20. Review

19 more citing papers are in PubMed but not listed here.

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

2 authors at 2 institutions in 1 country.

Maurizio CarcaterraRadiation Oncology, Belcolle Hospital, Viterbo, Italy. Electronic address: maurizio.carcaterra@asl.vt.it.
Cristina CarusoRadiation Oncology, San Giovanni Addolorata Hospital, Rome, Italy.
Azienda Ospedaliera San Giovanni Addolorata · ITOspedale di Belcolle · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The Corona Virus Disease (COVID-19) pandemic caused by Severe Acute Respiratory Syndrome Corona Virus 2 (SARS-CoV-2) requires a rapid solution and global collaborative efforts in order to define preventive and treatment strategies. One of the major challenges of this disease is the high number of patients needing advanced respiratory support due to the Acute Respiratory Distress Syndrome (ARDS) as the lung is the major - although not exclusive - target of the virus. The molecular mechanisms, pathogenic drivers and the target cell type(s) in SARS-CoV-2 infection are still poorly understood, but the development of a "hyperactive" immune response is proposed to play a role in the evolution of the disease and it is envisioned as a major cause of morbidity and mortality. Here we propose a theory by which the main targets for SARS-CoV-2 are the Type II Alveolar Epithelial Cells and the clinical manifestations of the syndrome are a direct consequence of their involvement. We propose the existence of a vicious cycle by which once alveolar damage starts in AEC II cells, the inflammatory state is supported by macrophage pro-inflammatory polarization (M1), cytokines release and by the activation of the NF-κB pathway. If this theory is confirmed, future therapeutic efforts can be directed to target Type 2 alveolar cells and the molecular pathogenic drivers associated with their dysfunction with currently available therapeutic strategies.

Indexed as

Models, BiologicalSARS-CoV-2Alveolar Epithelial CellsAngiotensin-Converting Enzyme 2COVID-19Endothelium, VascularHeparin, Low-Molecular-WeightHumansInflammationLiquid VentilationMacrophagesNeutrophilsNF-kappa BPandemicsPulmonary SurfactantsRespiratory Distress SyndromeACE2 protein, humanAngiotensin-Converting Enzyme 2Heparin, Low-Molecular-WeightNF-kappa BPulmonary SurfactantsAEC-IIAlveolar epithelial cell type 2ARDSCOVID-19COVID-19 pathogenesisNF-kB pathway activationSARS-CoV-2

Identifiers

PMID33308936
PMCPMC7681037
OpenAlexW3110131359

What OpenQuestion holds

Textmetadata
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.