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Miranda RA, Lima DGV, de Souza LL, Souza da Silva B, Bertasso IM, Meyer LG, Rossetti CL, Junior RR, Miranda-Alves L, de Moura EG, Lisboa PC. Maternal exposure to tributyltin alters the breast milk, hormonal profile, and thyroid morphology of dams and induces sex-specific changes in neonate rat offspring. Environ Pollut 2024; 349:123963. [PMID: 38621455 DOI: 10.1016/j.envpol.2024.123963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 03/22/2024] [Accepted: 04/10/2024] [Indexed: 04/17/2024]
Abstract
Tributyltin (TBT) is the chemical substance commonly used worldwide to prevent biofouling of vessels. Due to its ability to bioaccumulate and biomagnify, even after being banned, significant concentrations of TBT can be detected in sediment, affecting marine and human life. Although studies have shown that direct exposure to TBT alters physiological parameters in mammals, the relationship between exposure to TBT during pregnancy and lactation, considered critical windows for metabolic programming, has not been fully elucidated. Our hypothesis is that offspring whose mothers were exposed to TBT during critical stages of development may exhibit dysfunctions in endocrine-metabolic parameters. We used pregnant Wistar rats that were divided into groups and received the following treatments from gestational day 7 until the end of lactation by intragastric gavage: vehicle (ethanol 0.01%; Control), low TBT dose (100 ng/kg of body weight (bw)/day; TBT100ng) and high TBT dose (1000 ng/kg bw/day; TBT1000ng). Dams and offspring at birth and weaning (21 days old) were studied. Maternal exposure to TBT promoted dose-dependent changes in dams. The findings for adiposity, milk composition and lipid profile were more pronounced in TBT100 ng dam; however, thyroid morphology was altered in TBT1000 ng dam. Female offspring were differentially affected by the dose of exposure. At birth, females in the TBT100ng group had low body weight, lower naso-anal length (NAL), and higher plasma T4, and at weaning, females in the TBT100ng group had lower insulin and leptin levels. Females in the TBT1000ng group had lower NAL at birth and lower leptinemia and weight of white adipose tissue at weaning. Male offspring from TBT groups showed high T3 at birth, without biometric alterations at birth or weaning. Despite these findings, both sexes exhibited dose-dependent morphological changes in the thyroid gland. Thus, maternal exposure to TBT constitutes an important route of contamination for both dams and offspring.
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Affiliation(s)
- Rosiane Aparecida Miranda
- Laboratory of Endocrine Physiology, Institute of Biology Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro, RJ, Brazil
| | - Daniel Galinis Vieira Lima
- Laboratory of Endocrine Physiology, Institute of Biology Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro, RJ, Brazil
| | - Luana Lopes de Souza
- Laboratory of Endocrine Physiology, Institute of Biology Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro, RJ, Brazil
| | - Beatriz Souza da Silva
- Laboratory of Endocrine Physiology, Institute of Biology Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro, RJ, Brazil
| | - Iala Milene Bertasso
- Laboratory of Endocrine Physiology, Institute of Biology Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro, RJ, Brazil
| | - Lilian Guedes Meyer
- Laboratory of Endocrine Physiology, Institute of Biology Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro, RJ, Brazil
| | - Camila Lüdke Rossetti
- Laboratory of Endocrine Physiology, Institute of Biology Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro, RJ, Brazil
| | - Reinaldo Röpke Junior
- Laboratory of Experimental Endocrinology, Institute of Biomedical Sciences, Universidade Federal do Rio de Janeiro, RJ, Brazil; Post graduate Program in Endocrinology, Faculty of Medicine, Universidade Federal do Rio de Janeiro, RJ, Brazil
| | - Leandro Miranda-Alves
- Laboratory of Experimental Endocrinology, Institute of Biomedical Sciences, Universidade Federal do Rio de Janeiro, RJ, Brazil; Post graduate Program in Endocrinology, Faculty of Medicine, Universidade Federal do Rio de Janeiro, RJ, Brazil; Post graduate Program of Pharmacology and Medicinal Chemistry, Institute of Biomedical Sciences, Universidade Federal do Rio de Janeiro, RJ, Brazil; Post graduate Program of Morphological Sciences, Institute of Biomedical Sciences, Universidade Federal do Rio de Janeiro, RJ, Brazil
| | - Egberto Gaspar de Moura
- Laboratory of Endocrine Physiology, Institute of Biology Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro, RJ, Brazil
| | - Patricia Cristina Lisboa
- Laboratory of Endocrine Physiology, Institute of Biology Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro, RJ, Brazil.
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Bento-Bernardes T, Rossetti CL, Borba Vieira de Andrade C, Lopes de Souza L, Wilieman Cabral M, Silva Monteiro de Paula G, Woyames J, Jesus Oliveira K, Seixas da-Silva W, Cabanelas Pazos-Moura C. Disruption of neuromedin B receptor improves mitochondrial oxidative phosphorylation capacity in gastrocnemius muscle of female mice. Am J Physiol Endocrinol Metab 2022; 322:E250-E259. [PMID: 35068177 DOI: 10.1152/ajpendo.00073.2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Neuromedin B (NB), a bombesin-like peptide, exerts its specific actions by binding to the neuromedin B receptor (NBR), a G protein-coupled receptor. Female NBR-knockout (NBR-KO) mice exhibit resistance to diet-induced obesity, without hyperphagia, suggesting possible increase in energy expenditure. Skeletal muscle (SM) is crucial for whole body energy homeostasis, however, the presence of NB-NBR signaling and its effects in SM are unknown. Here, we show that male and female wild type express Nmbr and Nmb mRNA in SM, with higher levels in females. Female NBR-KO gastrocnemius showed increased Myh7 mRNA level, which characterizes type I fibers (oxidative profile). Their permeabilized gastrocnemius fibers, studied by high-resolution respirometry, exhibited higher consumption of O2 coupled to ATP synthesis and unaltered uncoupled respiration. NBR-KO gastrocnemius had higher protein levels of ATP-synthase and Nduf9 mRNA, corresponding to mitochondrial complex I subunit. NBR-KO gastrocnemius exhibited slight increase in mitochondria number, increased thickness of Z line at electron microscopy, and unaltered mitochondrial dynamics markers. Therefore, in the females' gastrocnemius, a predominantly glycolytic SM, the NBR absence promotes changes that favor mitochondrial oxidative phosphorylation capacity. In addition, in L6 myocytes, NB treatment (5 μg/mL/16 h) promoted lower O2 consumption coupled to ATP synthesis, suggesting direct action at SM cells. Altogether, the study reinforces the hypothesis that inhibition of NB-NBR signaling enhances the capacity for oxidative phosphorylation of white SM, encouraging future studies to elucidate their contribution on other types of SM and whole body energy expenditure, which may lead to a new target to drug development for obesity treatment.NEW & NOTEWORTHY This study describes neuromedin B (NB) and NB receptor as new regulators of skeletal muscle mitochondrial function. The white skeletal muscle mitochondrial oxidative phosphorylation capacity was increased by NB receptor genetic disruption in female mice. These findings may contribute to the resistance to diet-induced obesity, previously found in these mice, which requires future studies. Thus, investigations are necessary to clarify if blockade of NB receptor may be an approach to develop drugs to combat obesity.
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Affiliation(s)
- Thais Bento-Bernardes
- Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Camila Lüdke Rossetti
- Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Luana Lopes de Souza
- Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Marianna Wilieman Cabral
- Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Juliana Woyames
- Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Karen Jesus Oliveira
- Physiology and Pharmacology Department, Fluminense Federal University, Rio de Janeiro, Brazil
| | - Wagner Seixas da-Silva
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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de Paula GSM, Wilieman M, Silva KR, Baptista LS, Boudina S, de Souza LL, Bento-Bernardes T, Asensi KD, Goldenberg RCDS, Pazos-Moura CC. Neuromedin B receptor disruption impairs adipogenesis in mice and 3T3-L1 cells. J Mol Endocrinol 2019; 63:93-102. [PMID: 31067509 PMCID: PMC9931200 DOI: 10.1530/jme-19-0032] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 05/08/2019] [Indexed: 11/08/2022]
Abstract
Neuromedin B, a bombesin-like peptide, and its receptor, are expressed in white adipose tissue with undefined roles. Female mice with disruption of neuromedin B receptor (NB-R) exhibited partial resistance to diet-induced obesity leading to our hypothesis that NB-R is involved in adipogenesis. Here, we showed that adipose stem/stromal cells (ASC) from perigonadal fat of female NB-R-knockout mice, exposed to a differentiation protocol in vitro, accumulated less lipid (45%) than wild type, suggesting reduced capacity to differentiate under adipogenic input. To further explore mechanisms, preadipocytes 3T3-L1 cells were incubated in the presence of NB-R antagonist (PD168368) during the first 3 days in culture. Cells were analyzed in the end of the treatment (Day 3) and later when fully differentiated (Day 21). NB-R antagonist induced lower number of cells at day 3 and 21 (33-39%), reduced cell proliferation at day 3 (-53%) and reduced lipid accumulation at day 21 (-86%). The mRNA expressions of several adipocyte differentiation markers were importantly reduced at both days: Cebpb and Pparg and Fabp4, Plin-1 and Adipoq, and additionally Lep mRNA at day 21. The antagonist had no effect when incubated with mature 3T3-L1 adipocytes. Therefore, genetically disruption of NB-R in mice ASC or pharmacological antagonism of NB-R in 3T3-L1 cells impairs adipogenesis. The mechanisms suggested by results in 3T3-L1 cells involve reduction of cell proliferation and of early gene expressions, leading to decreased number of mature adipocytes. We speculate that NB-R antagonism may be useful to limit the increase in adiposity due to pre-adipocyte differentiation.
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Affiliation(s)
- Gabriela Silva Monteiro de Paula
- Molecular Endocrinology Laboratory, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Marianna Wilieman
- Molecular Endocrinology Laboratory, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Karina Ribeiro Silva
- Molecular Endocrinology Laboratory, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
- Post-Graduation Program of Biotechnology, National Institute of Metrology, Quality and Technology - INMETRO, Rio de Janeiro, Brazil
- Multidisciplinary Center for Biological Research (Numpex-Bio), Federal University of Rio de Janeiro - Campus of Duque de Caxias, Rio de Janeiro, Brazil
| | - Leandra Santos Baptista
- Post-Graduation Program of Biotechnology, National Institute of Metrology, Quality and Technology - INMETRO, Rio de Janeiro, Brazil
- Multidisciplinary Center for Biological Research (Numpex-Bio), Federal University of Rio de Janeiro - Campus of Duque de Caxias, Rio de Janeiro, Brazil
| | - Sihem Boudina
- Department of Nutrition and Integrative Physiology, University of Utah School of Medicine, Salt Lake City, Utah, USA
| | - Luana Lopes de Souza
- Molecular Endocrinology Laboratory, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Thais Bento-Bernardes
- Molecular Endocrinology Laboratory, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Karina Dutra Asensi
- Cellular and Molecular Cardiology Laboratory, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
- National Center of Structural Biology and Bioimage - CENABIO, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Regina Coeli Dos Santos Goldenberg
- Cellular and Molecular Cardiology Laboratory, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Carmen Cabanelas Pazos-Moura
- Molecular Endocrinology Laboratory, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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Cordeiro A, de Souza LL, Oliveira LS, Faustino LC, Santiago LA, Bloise FF, Ortiga-Carvalho TM, Almeida NADS, Pazos-Moura CC. Thyroid hormone regulation of Sirtuin 1 expression and implications to integrated responses in fasted mice. J Endocrinol 2013; 216:181-93. [PMID: 23151359 DOI: 10.1530/joe-12-0420] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Sirtuin 1 (SIRT1), a NAD(+)-dependent deacetylase, has been connected to beneficial effects elicited by calorie restriction. Physiological adaptation to starvation requires higher activity of SIRT1 and also the suppression of thyroid hormone (TH) action to achieve energy conservation. Here, we tested the hypothesis that those two events are correlated and that TH may be a regulator of SIRT1 expression. Forty-eight-hour fasting mice exhibited reduced serum TH and increased SIRT1 protein content in liver and brown adipose tissue (BAT), and physiological thyroxine replacement prevented or attenuated the increment of SIRT1 in liver and BAT of fasted mice. Hypothyroid mice exhibited increased liver SIRT1 protein, while hyperthyroid ones showed decreased SIRT1 in liver and BAT. In the liver, decreased protein is accompanied by reduced SIRT1 activity and no alteration in its mRNA. Hyperthyroid and hypothyroid mice exhibited increases and decreases in food intake and body weight gain respectively. Food-restricted hyperthyroid animals (pair-fed to euthyroid group) exhibited liver and BAT SIRT1 protein levels intermediary between euthyroid and hyperthyroid mice fed ad libitum. Mice with TH resistance at the liver presented increased hepatic SIRT1 protein and activity, with no alteration in Sirt1 mRNA. These results suggest that TH decreases SIRT1 protein, directly and indirectly, via food ingestion control and, in the liver, this reduction involves TRβ. The SIRT1 reduction induced by TH has important implication to integrated metabolic responses to fasting, as the increase in SIRT1 protein requires the fasting-associated suppression of TH serum levels.
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Affiliation(s)
- Aline Cordeiro
- Biophysics Institute Carlos Chagas Filho, Federal University of Rio de Janeiro, Cidade Universitária - Ilha do Fundão, Avenida Carlos Chagas Filho, 373, Centro de Ciências da Saúde, Bloco G, CEP: 21941-902, Rio de Janeiro, RJ, Brazil
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