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Carvalho-Filho MA, Ropelle ER, Pauli RJ, Cintra DE, Tsukumo DML, Silveira LR, Curi R, Carvalheira JBC, Velloso LA, Saad MJA. Expression of Concern: Aspirin attenuates insulin resistance in muscle of diet-induced obese rats by inhibiting inducible nitric oxide synthase production and S-nitrosylation of IRβ/IRS-1 and Akt. Diabetologia 2017:10.1007/s00125-017-4292-5. [PMID: 28516213 DOI: 10.1007/s00125-017-4292-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M A Carvalho-Filho
- FCM-UNICAMP, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil
| | - E R Ropelle
- FCM-UNICAMP, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil
| | - R J Pauli
- FCM-UNICAMP, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil
| | - D E Cintra
- FCM-UNICAMP, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil
| | - D M L Tsukumo
- FCM-UNICAMP, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil
| | - L R Silveira
- FCM-UNICAMP, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil
| | - R Curi
- FCM-UNICAMP, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil
| | - J B C Carvalheira
- FCM-UNICAMP, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil
| | - L A Velloso
- FCM-UNICAMP, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil
| | - M J A Saad
- FCM-UNICAMP, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil.
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Carvalho BM, Guadagnini D, Tsukumo DML, Schenka AA, Latuf-Filho P, Vassallo J, Dias JC, Kubota LT, Carvalheira JBC, Saad MJA. Expression of Concern: Modulation of gut microbiota by antibiotics improves insulin signalling in high-fat fed mice. Diabetologia 2017:10.1007/s00125-017-4293-4. [PMID: 28508093 DOI: 10.1007/s00125-017-4293-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- B M Carvalho
- Internal Medicine Department-Faculty of Medical Sciences, State University of Campinas, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil
| | - D Guadagnini
- Internal Medicine Department-Faculty of Medical Sciences, State University of Campinas, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil
| | - D M L Tsukumo
- Internal Medicine Department-Faculty of Medical Sciences, State University of Campinas, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil
| | - A A Schenka
- Internal Medicine Department-Faculty of Medical Sciences, State University of Campinas, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil
| | - P Latuf-Filho
- Internal Medicine Department-Faculty of Medical Sciences, State University of Campinas, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil
| | - J Vassallo
- Internal Medicine Department-Faculty of Medical Sciences, State University of Campinas, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil
| | - J C Dias
- Chemistry Institute, State University of Campinas, Campinas, São Paulo, Brazil
| | - L T Kubota
- Chemistry Institute, State University of Campinas, Campinas, São Paulo, Brazil
| | - J B C Carvalheira
- Internal Medicine Department-Faculty of Medical Sciences, State University of Campinas, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil
| | - M J A Saad
- Internal Medicine Department-Faculty of Medical Sciences, State University of Campinas, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil.
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Carvalho BM, Guadagnini D, Tsukumo DML, Schenka AA, Latuf-Filho P, Vassallo J, Dias JC, Kubota LT, Carvalheira JBC, Saad MJA. Modulation of gut microbiota by antibiotics improves insulin signalling in high-fat fed mice. Diabetologia 2012; 55:2823-2834. [PMID: 22828956 DOI: 10.1007/s00125-012-2648-4] [Citation(s) in RCA: 206] [Impact Index Per Article: 17.2] [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] [Received: 02/23/2012] [Accepted: 06/18/2012] [Indexed: 02/07/2023]
Abstract
AIMS/HYPOTHESIS A high-fat dietary intake induces obesity and subclinical inflammation, which play important roles in insulin resistance. Recent studies have suggested that increased concentrations of circulating lipopolysaccharide (LPS), promoted by changes in intestinal permeability, may have a pivotal role in insulin resistance. Thus, we investigated the effect of gut microbiota modulation on insulin resistance and macrophage infiltration. METHODS Swiss mice were submitted to a high-fat diet with antibiotics or pair-feeding for 8 weeks. Metagenome analyses were performed on DNA samples from mouse faeces. Blood was collected to determine levels of glucose, insulin, LPS, cytokines and acetate. Liver, muscle and adipose tissue proteins were analysed by western blotting. In addition, liver and adipose tissue were analysed, blinded, using histology and immunohistochemistry. RESULTS Antibiotic treatment greatly modified the gut microbiota, reducing levels of Bacteroidetes and Firmicutes, overall bacterial count and circulating LPS levels. This modulation reduced levels of fasting glucose, insulin, TNF-α and IL-6; reduced activation of toll-like receptor 4 (TLR4), c-Jun N-terminal kinase (JNK), inhibitor of κ light polypeptide gene enhancer in B cells, kinase β (IKKβ) and phosphorylated IRS-1 Ser307; and consequently improved glucose tolerance and insulin tolerance and action in metabolically active tissues. In addition, there was an increase in portal levels of circulating acetate, which probably contributed to an increase in 5'-AMP-activated protein kinase (AMPK) phosphorylation in mice. We observed a striking reduction in crown-like structures (CLS) and F4/80(+) macrophage cells in the adipose tissue of antibiotic-treated mice. CONCLUSIONS/INTERPRETATION These results suggest that modulation of gut microbiota in obesity can improve insulin signalling and glucose tolerance by reducing circulating LPS levels and inflammatory signalling. Modulation also appears to increase levels of circulating acetate, which activates AMPK and finally leads to reduced macrophage infiltration.
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Affiliation(s)
- B M Carvalho
- Internal Medicine Department-Faculty of Medical Sciences, State University of Campinas, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil
| | - D Guadagnini
- Internal Medicine Department-Faculty of Medical Sciences, State University of Campinas, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil
| | - D M L Tsukumo
- Internal Medicine Department-Faculty of Medical Sciences, State University of Campinas, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil
| | - A A Schenka
- Internal Medicine Department-Faculty of Medical Sciences, State University of Campinas, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil
| | - P Latuf-Filho
- Internal Medicine Department-Faculty of Medical Sciences, State University of Campinas, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil
| | - J Vassallo
- Internal Medicine Department-Faculty of Medical Sciences, State University of Campinas, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil
| | - J C Dias
- Chemistry Institute, State University of Campinas, Campinas, São Paulo, Brazil
| | - L T Kubota
- Chemistry Institute, State University of Campinas, Campinas, São Paulo, Brazil
| | - J B C Carvalheira
- Internal Medicine Department-Faculty of Medical Sciences, State University of Campinas, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil
| | - M J A Saad
- Internal Medicine Department-Faculty of Medical Sciences, State University of Campinas, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo, 13083-887, Brazil.
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Carvalho-Filho MA, Ropelle ER, Pauli RJ, Cintra DE, Tsukumo DML, Silveira LR, Curi R, Carvalheira JBC, Velloso LA, Saad MJA. Aspirin attenuates insulin resistance in muscle of diet-induced obese rats by inhibiting inducible nitric oxide synthase production and S-nitrosylation of IRbeta/IRS-1 and Akt. Diabetologia 2009; 52:2425-34. [PMID: 19730809 DOI: 10.1007/s00125-009-1498-1] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [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] [Received: 04/01/2009] [Accepted: 07/15/2009] [Indexed: 02/06/2023]
Abstract
AIM/HYPOTHESIS High-dose aspirin treatment improves fasting and postprandial hyperglycaemia in patients with type 2 diabetes, as well as in animal models of insulin resistance associated with obesity and sepsis. In this study, we investigated the effects of aspirin treatment on inducible nitric oxide synthase (iNOS)-mediated insulin resistance and on S-nitrosylation of insulin receptor (IR)-beta, IRS-1 and protein kinase B (Akt) in the muscle of diet-induced obese rats and also in iNos (also known as Nos2)-/- mice on high fat diet. METHODS Aspirin (120 mg kg-1 day-1 for 2 days) or iNOS inhibitor (L-NIL; 80 mg/kg body weight) were administered to diet-induced obese rats or mice and iNOS production and insulin signalling were investigated. S-nitrosylation of IRbeta/IRS-1 and Akt was investigated using the biotin switch method. RESULTS iNOS protein levels increased in the muscle of diet-induced obese rats, associated with an increase in S-nitrosylation of IRbeta, IRS-1 and Akt. These alterations were reversed by aspirin treatment, in parallel with an improvement in insulin signalling and sensitivity, as measured by insulin tolerance test and glucose clamp. Conversely, while aspirin reversed the increased phosphorylation of IkappaB kinase beta and c-Jun amino-terminal kinase, as well as IRS-1 serine phosphorylation in diet-induced obese rats and iNos -/- mice on high-fat diet, these alterations were not associated with the improvement of insulin action induced by this drug. CONCLUSIONS/INTERPRETATION Our data demonstrate that aspirin treatment not only reduces iNOS protein levels, but also S-nitrosylation of IRbeta, IRS-1 and Akt. These changes are associated with improved insulin resistance and signalling, suggesting a novel mechanism of insulin sensitisation evoked by aspirin treatment.
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Affiliation(s)
- M A Carvalho-Filho
- FCM-UNICAMP, Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas, São Paulo 13083-887, Brazil
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