Evidence map›Paper›PMID 33105010›Full record

ArticleEnvironmental science and pollution research international2021

Effects of lead exposure on salivary glands of rats: insights into the oxidative biochemistry and glandular morphology.

Géssica de Oliveira Lopes, Walessa Alana Bragança Aragão, Priscila Cunha Nascimento, Leonardo Oliveira Bittencourt, Ana Carolina Alves Oliveira, Luana Ketlen Reis Leão, Sergio Melo Alves-Júnior, João de Jesus Viana Pinheiro, Maria Elena Crespo-Lopez, Rafael Rodrigues Lima

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In one paragraph

Article in Environmental science and pollution research international, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed, 1 pooled it
1.0field-weighted citation impact, top 25% 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

11 citing papers in PubMed, 1 synthesis or guideline pooled it, 18 citations in OpenAlex.

  1. Pooled it
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  4. Review
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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

10 authors at 1 institution in 1 country.

Géssica de Oliveira LopesLaboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, Augusto Corrêa Street, Guamá, Belém, PA, 66075-110, Brazil.
Walessa Alana Bragança AragãoLaboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, Augusto Corrêa Street, Guamá, Belém, PA, 66075-110, Brazil.
Priscila Cunha NascimentoLaboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, Augusto Corrêa Street, Guamá, Belém, PA, 66075-110, Brazil.
Leonardo Oliveira BittencourtLaboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, Augusto Corrêa Street, Guamá, Belém, PA, 66075-110, Brazil.
Ana Carolina Alves OliveiraLaboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, Augusto Corrêa Street, Guamá, Belém, PA, 66075-110, Brazil.
Luana Ketlen Reis LeãoLaboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, Augusto Corrêa Street, Guamá, Belém, PA, 66075-110, Brazil.
Sergio Melo Alves-JúniorSchool of Dentistry, Federal University of Pará, Belém, PA, Brazil.
João de Jesus Viana PinheiroSchool of Dentistry, Federal University of Pará, Belém, PA, Brazil.
Maria Elena Crespo-LopezLaboratory of Molecular Pharmacology, Institute of Biological Sciences, Federal University of Pará, Belém, PA, Brazil.
Rafael Rodrigues LimaLaboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Pará, Augusto Corrêa Street, Guamá, Belém, PA, 66075-110, Brazil. rafalima@ufpa.br.ORCID http://orcid.org/0000-0003-1486-4013
Universidade Federal do Pará · BR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

This study aimed to investigate the effects of lead (Pb) exposure on parotid and submandibular glands through morphological aspects as well as the systemic and salivary gland redox state. Male Wistar rats were exposed to 50 mg/kg/day of Pb-acetate or distilled water by intragastric gavage for 55 days (n = 40). Blood samples were used for lipid peroxidation (LPO), glutathione (GSH), and trolox equivalent antioxidant capacity (TEAC) assays. Samples of salivary glands were analyzed by LPO, nitrites (NO), and antioxidant capacity against peroxyl radicals (ACAP) levels. Morphometric analyses (total stromal area [TSA], total parenchyma area [TPA], total ductal area [TDA], and total acinar area [TAA]) and immunohistochemistry for cytokeratin-19 (CK-19), metallothionein I/II (MT I/II), and anti-smooth muscle actin (α-SMA) were performed. The results revealed that exposure to Pb triggered systemic oxidative stress represented by lower GSH levels and increased TBARS/TEAC ratio in blood plasma. ACAP was reduced, while NO and LPO were increased in both parotid and submandibular. The morphological analyses showed increase on MT I/II expression, reduced CK-19 expression in both glands, and α-SMA reduced the immunostaining only in the parotid glands. The morphometric analyses revealed an increase in TPA in both glands, while TAA was reduced only in submandibular glands and TDA was increased only in parotid glands. Our findings are pioneer in showing that long-term exposure to Pb is able to promote blood and glandular oxidative stress associated with cellular, morphological, and biochemical damage in both parotid and submandibular glands.

Indexed as

LeadSalivary GlandsAnimalsMaleOxidation-ReductionOxidative StressRatsRats, WistarLeadCytoskeletonLeadOxidative biochemistrySalivary glands

Identifiers

PMID33105010
OpenAlexW3093776333

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.