Evidence map›Paper›PMID 33774023›Full record

ArticleLife sciences2021

Dipeptidylpeptidase-4 levels and DPP4 gene polymorphisms in patients with COVID-19. Association with disease and with severity.

Rosalinda Posadas-Sánchez, Fausto Sánchez-Muñoz, Carlos Alfonso Guzmán-Martín, Adrian Hernández-Díaz Couder, Gustavo Rojas-Velasco, José Manuel Fragoso, Gilberto Vargas-Alarcón

Open access · greenAbstract read
In one paragraph

Article in Life sciences, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed, 4 pooled it
3.0field-weighted citation impact, top 6% 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

25 citing papers in PubMed, 4 syntheses or guidelines pooled it, 36 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Pooled it
  5. Article
  6. Article
  7. Association ofInternational journal of molecular sciences · 2025
    Article
  8. Review
  9. Article
  10. Review
  11. Article
  12. Article
  13. Article
  14. Review
  15. Genetic variation inJournal of diabetes and metabolic disorders · 2022
    Article
  16. Review
  17. Review
  18. Association of the rs17574Diagnostics (Basel, Switzerland) · 2022
    Article
  19. Observational
  20. The rs8176740Biomolecules · 2022
    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 1 institution in 1 country.

Rosalinda Posadas-SánchezDepartment of Endocrinology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico.
Fausto Sánchez-MuñozDepartament of Immunology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico.
Carlos Alfonso Guzmán-MartínDepartament of Immunology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico.
Adrian Hernández-Díaz CouderDepartament of Immunology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico.
Gustavo Rojas-VelascoIntensive Care Unit, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico.
José Manuel FragosoDepartment of Molecular Biology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico.
Gilberto Vargas-AlarcónDepartment of Molecular Biology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico. Electronic address: gvargas63@yahoo.com.
Instituto Nacional de Cardiología · MX

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the virus that causes de COVID-19 disease use as a principal receptor the angiotensin-converting enzyme-2 (ACE2). It has been suggested that dipeptidyl peptidase-4 (DPP4) can be another possible receptor for this virus. The present study aimed to establish if the DPP4 levels and DPP4 polymorphisms are associated with COVID-19 disease and its severity.

methodsThe study included 107 COVID-19 patients and 263 matched-healthy controls. Fifty patients required invasive mechanical ventilation. The DPP4 was quantified in serum using the Bioplex system. Based on the previous results and the functional prediction analysis, we select for the study 5 DPP4 polymorphisms (rs12617336, rs12617656, rs1558957, rs3788979, and rs17574) and these were determined using the 5´exonuclease TaqMan assays.

resultsLow levels of DPP4 were observed in COVID-19 patients (46.5 [33.1-57.7] ng/mL) when compared to healthy controls (125.3 [100.3-157.3] ng/mL) (P < 0.0001). Also, patients that required mechanical ventilation showed lower DPP4 levels (42.8 [29.8-56.9] ng/mL) than those that did not need this procedure (49.2 [39.9-65.6] ng/mL) (P = 0.012). DPP4 levels correlated negatively with age, fibrinogen, and platelet levels, and positively with albumin, alanine aminotransferase, and percentage of neutrophils. The DPP4 rs3788979 polymorphism was associated with a high risk of COVID-19 disease and, the TT genotype carriers had the lowest DPP4 levels.

conclusionsIn summary, in the present study, an association of low levels of DPP4 with COVID-19 disease and severity was found. The association of the DPP4 rs3788979 polymorphism with COVID-19 is also reported.

Indexed as

AdultAgedAngiotensin-Converting Enzyme 2COVID-19Dipeptidyl Peptidase 4FemaleGene FrequencyHumansMaleMexicoMiddle AgedPolymorphism, Single NucleotideSARS-CoV-2Severity of Illness IndexACE2 protein, humanAngiotensin-Converting Enzyme 2Dipeptidyl Peptidase 4DPP4 protein, humanAngiotensin converting enzyme-2COVID-19 diseaseDipeptidylpeptidase-4PolymorphismsSevere acute respiratory syndrome coronavirus 2

Identifiers

PMID33774023
PMCPMC7989663
OpenAlexW3138200263

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.