Evidence map›Paper›PMID 29075332›Full record

ArticleDiabetology & metabolic syndrome2017

Hypermethylation in the promoter of the

Mayara Karla Dos Santos Nunes, Alexandre Sérgio Silva, Isabella Wanderley de Queiroga Evangelista, João Modesto Filho, Cecília Neta Alves Pegado Gomes, Rayner Anderson Ferreira do Nascimento, Rafaella Cristhine Pordeus Luna, Maria José de Carvalho Costa, Naila Francis Paulo de Oliveira, Darlene Camati Persuhn

Open access · goldAbstract read
In one paragraph

Article in Diabetology & metabolic syndrome, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 1 pooled it
5.7field-weighted citation impact, top 3% 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

22 citing papers in PubMed, 1 synthesis or guideline pooled it, 53 citations in OpenAlex.

  1. Epigenetic Mechanisms in Type 2 Diabetes Retinopathy: A Systematic Review.International journal of molecular sciences · 2021
    Pooled it
  2. Review
  3. The Study ofInternational journal of fertility & sterility · 2025
    Article
  4. Review
  5. Association Between DNA Methylation ofJournal of diabetes research · 2025
    Article
  6. Review
  7. Article
  8. Susceptibility to hypertension based onFrontiers in cardiovascular medicine · 2023
    Article
  9. Review
  10. Article
  11. Review
  12. Review
  13. Article
  14. Article
  15. Review
  16. Article
  17. Physical Activity Level InfluencesFrontiers in physiology · 2020
    Article
  18. Association of Polymorphisms in Genes Involved in One-Carbon Metabolism withInternational journal of molecular sciences · 2019
    Article
  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

10 authors at 3 institutions in 1 country.

Mayara Karla Dos Santos NunesPost-Graduation Program in Cellular and Molecular Biology, Federal University of Paraiba, Joao Pessoa, Brazil.
Alexandre Sérgio SilvaPhysical Education Department, Federal University of Paraiba, Joao Pessoa, Brazil.
Isabella Wanderley de Queiroga EvangelistaOphthalmology Reference Center, Lauro Wanderley University Hospital, Federal University of Paraiba, Joao Pessoa, Brazil.
João Modesto FilhoDepartment of Internal Medicine, Federal University of Paraiba, Joao Pessoa, Brazil.
Cecília Neta Alves Pegado GomesNephrology Clinic, Lauro Wanderley University Hospital, Federal University of Paraiba, Joao Pessoa, Brazil.
Rayner Anderson Ferreira do NascimentoFaculty Mauricio of Nassau, Joao Pessoa, Brazil.
Rafaella Cristhine Pordeus LunaPost-Graduate Program in Nutrition Science, Federal University of Paraiba, Joao Pessoa, Brazil.
Maria José de Carvalho CostaNutrition Science Department and Post-Graduate Program in Nutrition Science, Federal University of Paraiba, Joao Pessoa, Brazil.
Naila Francis Paulo de OliveiraDepartment of Molecular Biology, Federal University of Paraiba, Joao Pessoa, Brazil.
Darlene Camati PersuhnDepartment of Molecular Biology and Post-Graduation Program in Nutrition Science, Federal University of Paraiba, CEP 58051-900 Joao Pessoa, Brazil.
Universidade Federal da Paraíba · BRCentro Universitário Maurício de Nassau · BRHospital Universitário Lauro Wanderley · BR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundDNA methylation is an epigenetic mechanism for regulating the transcription of many genes and has been linked to the development of various diseases. A promising gene to investigate is methylenetetrahydrofolate reductase (MTHFR), since the enzyme methylenetetrahydrofolate reductase (MTHFR) promotes methyl radical synthesis in the homocysteine cycle and can provide methyl groups for DNA methylation. In addition, several studies have correlated gene polymorphisms of this enzyme with a greater risk of diabetes, but little is known regarding the relationship between epigenetic changes in this gene and diabetes and its complications. The aim of this study was to investigate the relationship between methylation profile in the MTHFR gene promoter and biochemical, inflammatory and oxidative stress markers in individuals with type 2 diabetes (T2DM) who have been diagnosed for 5-10 years with or without diabetic retinopathy (DR) and nephropathy (DN).

methodsSpecific PCR for methylation (MSP) was used to analyze MTHFR methylation profile in leucocytes DNA. Biochemical markers (glycemia, glycated hemoglobin, total cholesterol, LDL, HDL, triglycerides, serum creatinine), inflammatory markers (C-reactive protein and alpha-1 acid glycoprotein) and oxidative stress (total antioxidant and malonaldehyde) were determined in peripheric blood samples and microalbuminuria in 24 h urine samples. The X

resultsThe hypermethylated profile was most frequently observed in individuals with retinopathy (p < 0.01) and was associated with higher total cholesterol and LDL levels (p = 0.0046, 0.0267, respectively). Individuals with DN and hypermethylated profiles had higher levels of alpha-1 acid glycoprotein (p = 0.0080) and total antioxidant capacity (p = 0.0169) compared to subjects without complications.

conclusionsHypermethylation in the promoter of the MTHFR gene is associated with the occurrence of DR and with biochemical, inflammatory and oxidative stress parameters in the context of chronic complications.

Identifiers

PMID29075332
PMCPMC5648437
OpenAlexW2766049664

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.