Evidence map›Paper›PMID 25957795›Full record

ArticleReproductive biology and endocrinology : RB&E2015

The periovulatory endocrine milieu affects the uterine redox environment in beef cows.

Roney S Ramos, Milena L Oliveira, Aryele P Izaguirry, Laura M Vargas, Melina B Soares, Fernando S Mesquita, Francielli W Santos, Mario Binelli

Open access · goldAbstract read
In one paragraph

Article in Reproductive biology and endocrinology : RB&E, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
13.3field-weighted citation impact, top 1% 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

14 citing papers in PubMed, 45 citations in OpenAlex.

  1. Melatonin Enhances Embryo Quality in Japanese Black Cows During the Hot Season.Reproduction in domestic animals = Zuchthygiene · 2026
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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

8 authors at 2 institutions in 1 country.

Roney S RamosDepartment of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, SP, 13635-900, Brazil. roney.ramos@yahoo.com.br.
Milena L OliveiraDepartment of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, SP, 13635-900, Brazil. mileoliveira@usp.br.
Aryele P IzaguirryLaboratory of Reproductive Biotechnology (Biotech), Federal University of Pampa, Uruguaiana, Brazil. aryeleizaguirry777@gmail.com.
Laura M VargasLaboratory of Reproductive Biotechnology (Biotech), Federal University of Pampa, Uruguaiana, Brazil. laumusacchio@gmail.com.
Melina B SoaresLaboratory of Reproductive Biotechnology (Biotech), Federal University of Pampa, Uruguaiana, Brazil. melina_bucco@hotmail.com.
Fernando S MesquitaSchool of Veterinary Medicine, Federal University of Pampa, Uruguaiana, Brazil. fernando.mesquita@unipampa.edu.br.
Francielli W SantosLaboratory of Reproductive Biotechnology (Biotech), Federal University of Pampa, Uruguaiana, Brazil. francielliweber@yahoo.com.br.
Mario BinelliDepartment of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, SP, 13635-900, Brazil. binelli@usp.br.
Biotech (Brazil) · BRUniversidade Federal do Pampa · BR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundIn cattle, recent studies have shown positive associations between pre-ovulatory concentrations of estradiol (E2), progesterone (P4) at early diestrus and fertility. However, information on cellular and molecular mechanisms through which sex steroids regulate uterine function to support early pregnancy is lacking. Based on endometrial transcriptome data, objective was to compare function of the redox system in the bovine uterus in response to different periovulatory endocrine milieus.

methodsWe employed an animal model to control growth of the pre-ovulatory follicle and subsequent corpus luteum (CL). The large follicle-large CL group (LF-LCL, N=42) presented greater levels of E2 on the day of GnRH treatment (D0; 2.94 vs. 1.27 pg/mL; P=0.0007) and P4 at slaughter on D7 (3.71 vs. 2.62 ng/mL, P=0.01), compared with the small follicle-small CL group (SF-SCL, N=41). Endometrium and uterine washings (N=9, per group) were collected for analyses of variables associated with the uterine redox system.

resultsThe SF-SCL group had lower endometrial catalase (0.5 vs. 0.79 U/mg protein, P<0.001) and glutathione peroxidase (GPx; 2.0 vs. 2.43 nmol β-nicotinamide adenine dinucleotide phosphate reduced/min/mg protein, P=0.04) activity, as well as higher lipid peroxidation (28.5 vs. 17.43 nmol malondialdehyde/mg of protein, P<0.001) and superoxide dismutase (SOD) activity (44.77 vs. 37.76 U; P=0.04). There were no differences in the endometrial reactive species (RS) or glutathione (GSH) concentrations between the groups. The uterine washing samples showed no differences in the concentrations of RS or GSH or in total SOD activity (P>0.1). Additionally, catalase, GPx4, SOD1 and SOD2 gene expression was lower in the SF-SCL group than in the LF-LCL group.

conclusionsWe concluded that the intrauterine environment of cows from the LF-LCL group exhibited higher antioxidant activity than that of the cows from the SF-SCL group. We speculate that uterine receptivity and fertility are associated with an optimal redox environment, such as that present in the animals in the LF-LCL group.

Indexed as

FertilityOxidation-ReductionAnimalsAntioxidantsCattleDiestrusEstradiolEstrous CycleFemaleLipid PeroxidationOxidative StressProgesteroneAntioxidantsEstradiolProgesterone

Identifiers

PMID25957795
PMCPMC4436708
OpenAlexW1603647134

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.