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Oshiyama NF, Pereira AHM, Cardoso AC, Franchini KG, Bassani JWM, Bassani RA. Developmental differences in myocardial transmembrane Na + transport: Implications for excitability and Na + handling. J Physiol 2022; 600:2651-2667. [PMID: 35489088 DOI: 10.1113/jp282661] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 04/20/2022] [Indexed: 11/08/2022] Open
Abstract
KEY POINTS Previous studies showed that myocardial preparations from immature rats are less sensitive to electrical field stimulation than adult preparations. Freshly-isolated ventricular myocytes from neonatal rats showed lower excitability than adult cells, e.g., less negative threshold membrane potential and greater membrane depolarization required for action potential triggering. In addition to differences in mRNA levels for Na+ channels isoforms and greater Na+ current (INa ) density, Na+ channel voltage-dependence was shifted to the right in immature myocytes, which seems to be sufficient to decrease excitability, according to computer simulations. Only in neonatal myocytes did cyclic activity promote marked cytosolic Na+ accumulation, which was prevented by abolition of systolic Ca2+ transients by blockade of Ca2+ currents. Developmental changes in INa may account for the difference in action potential initiation parameters, but not for cytosolic Na+ accumulation, which seems to be due mainly to Na+ /Ca2+ exchanger-mediated Na+ influx. ABSTRACT Little is currently known about possible developmental changes in myocardial Na+ handling, which may have impact on cell excitability and Ca2+ content. Resting intracellular Na+ concentration ([Na+ ]i ), measured in freshly-isolated rat ventricular myocytes with CoroNa-green, was not significantly different in neonates (3-5 days old) and adults, but electrical stimulation caused marked [Na+ ]i rise only in neonates. Inhibition of L-type Ca2+ current by CdCl2 abolished not only systolic Ca2+ transients, but also activity-dependent intracellular Na+ accumulation in immature cells. This indicates that the main Na+ influx pathway during activity is the Na+ /Ca2+ exchanger, rather than voltage-dependent Na+ current (INa ), which was not affected by CdCl2 . In immature myocytes, INa density was 2-fold greater, inactivation was faster, and the current peak occurred at less negative transmembrane potential (Em ) than in adults. Na+ channel steady-state activation and inactivation curves in neonates showed a rightward shift, which should increase channel availability at diastolic Em , but also require greater depolarization for excitation, which was observed experimentally and reproduced in computer simulations. Ventricular mRNA levels of Nav 1.1, Nav 1.4 and Nav 1.5 pore-forming isoforms were greater in neonate ventricles, while decrease was seen for the β1 subunit. Both molecular and biophysical changes in the channel profile may contribute to the differences in INa density and voltage-dependence, and also to the less negative threshold Em in neonates, compared to adults. The apparently lower excitability in immature ventricle may confer protection against the development of spontaneous activity in this tissue. Abstract figure legend Little is currently known about possible developmental changes in myocardial Na+ transport, which may have impact on cell excitability and other physiological aspects. At the mRNA level, neonatal rat ventricle expresses a greater variety of Na+ channel isoforms than in adults. In immature ventricular cardiomyocytes, Na+ current (INa ) density was greater, but voltage-dependence is shifted to less negative potentials than in adults. This should increase channel availability at diastolic membrane potential, but also require greater depolarization for excitation, which was observed experimentally and reproduced in computer simulation. We also observed that electrical stimulation caused marked intracellular Na+ accumulation only in neonates, which was abolished when Ca2+ transients and the Na+ /Ca2+ exchanger (NCX) were inhibited by Cd2+ + Ni2+ . Thus, it seems that the main Na+ influx pathway during activity in neonates is the NCX, rather than voltage-dependent INa , which was not affected by these blockers. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Natália F Oshiyama
- Department of Biomedical Engineering, School of Electrical and Computer Engineering, University of Campinas, Campinas, SP, Brazil.,National Laboratory for Cell Calcium Study, (LabNECC), Center for Biomedical Engineering, University of Campinas, Campinas, SP, Brazil
| | - Ana H M Pereira
- Brazilian Biosciences National Laboratory, Brazilian Center for Research in Energy and Materials (LNBio/CNPEM), Campinas, SP, Brazil
| | - Alisson C Cardoso
- Brazilian Biosciences National Laboratory, Brazilian Center for Research in Energy and Materials (LNBio/CNPEM), Campinas, SP, Brazil
| | - Kleber G Franchini
- Brazilian Biosciences National Laboratory, Brazilian Center for Research in Energy and Materials (LNBio/CNPEM), Campinas, SP, Brazil.,Department of Internal Medicine, School of Medicine, University of Campinas, Campinas, SP, Brazil
| | - José W M Bassani
- Department of Biomedical Engineering, School of Electrical and Computer Engineering, University of Campinas, Campinas, SP, Brazil.,National Laboratory for Cell Calcium Study, (LabNECC), Center for Biomedical Engineering, University of Campinas, Campinas, SP, Brazil
| | - Rosana A Bassani
- Department of Biomedical Engineering, School of Electrical and Computer Engineering, University of Campinas, Campinas, SP, Brazil.,National Laboratory for Cell Calcium Study, (LabNECC), Center for Biomedical Engineering, University of Campinas, Campinas, SP, Brazil
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Cardoso AC, Lam NT, Savla JJ, Nakada Y, Pereira AHM, Elnwasany A, Menendez-Montes I, Ensley EL, Petric UB, Sharma G, Sherry AD, Malloy CR, Khemtong C, Kinter MT, Tan WLW, Anene-Nzelu CG, Foo RSY, Nguyen NUN, Li S, Ahmed MS, Elhelaly WM, Abdisalaam S, Asaithamby A, Xing C, Kanchwala M, Vale G, Eckert KM, Mitsche MA, McDonald JG, Hill JA, Huang L, Shaul PW, Szweda LI, Sadek HA. Mitochondrial Substrate Utilization Regulates Cardiomyocyte Cell Cycle Progression. Nat Metab 2020; 2:167-178. [PMID: 32617517 PMCID: PMC7331943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The neonatal mammalian heart is capable of regeneration for a brief window of time after birth. However, this regenerative capacity is lost within the first week of life, which coincides with a postnatal shift from anaerobic glycolysis to mitochondrial oxidative phosphorylation, particularly towards fatty-acid utilization. Despite the energy advantage of fatty-acid beta-oxidation, cardiac mitochondria produce elevated rates of reactive oxygen species when utilizing fatty acids, which is thought to play a role in cardiomyocyte cell-cycle arrest through induction of DNA damage and activation of DNA-damage response (DDR) pathway. Here we show that inhibiting fatty-acid utilization promotes cardiomyocyte proliferation in the postnatatal heart. First, neonatal mice fed fatty-acid deficient milk showed prolongation of the postnatal cardiomyocyte proliferative window, however cell cycle arrest eventually ensued. Next, we generated a tamoxifen-inducible cardiomyocyte-specific, pyruvate dehydrogenase kinase 4 (PDK4) knockout mouse model to selectively enhance oxidation of glycolytically derived pyruvate in cardiomyocytes. Conditional PDK4 deletion resulted in an increase in pyruvate dehydrogenase activity and consequently an increase in glucose relative to fatty-acid oxidation. Loss of PDK4 also resulted in decreased cardiomyocyte size, decreased DNA damage and expression of DDR markers and an increase in cardiomyocyte proliferation. Following myocardial infarction, inducible deletion of PDK4 improved left ventricular function and decreased remodelling. Collectively, inhibition of fatty-acid utilization in cardiomyocytes promotes proliferation, and may be a viable target for cardiac regenerative therapies.
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Affiliation(s)
- Alisson C. Cardoso
- Department of Internal Medicine, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
- Brazilian Biosciences National Laboratory, Brazilian Center
for Research in Energy and Materials (CNPEM), Campinas, Sao Paulo, Brazil
| | - Nicholas T. Lam
- Department of Internal Medicine, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
| | - Jainy J. Savla
- Department of Internal Medicine, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
| | - Yuji Nakada
- Department of Internal Medicine, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
| | - Ana Helena M. Pereira
- Department of Internal Medicine, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
- Brazilian Biosciences National Laboratory, Brazilian Center
for Research in Energy and Materials (CNPEM), Campinas, Sao Paulo, Brazil
| | - Abdallah Elnwasany
- Department of Internal Medicine, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
| | - Ivan Menendez-Montes
- Department of Internal Medicine, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
| | - Emily L. Ensley
- Department of Internal Medicine, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
| | - Ursa Bezan Petric
- Department of Internal Medicine, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
| | - Gaurav Sharma
- Advanced Imaging Research Center, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
| | - A. Dean Sherry
- Advanced Imaging Research Center, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
- Department of Radiology, University of Texas Southwestern
Medical Center, Dallas, Texas, USA
- Department of Chemistry, University of Texas in Dallas,
Dallas, Texas, USA
| | - Craig R. Malloy
- Department of Internal Medicine, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
- Advanced Imaging Research Center, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
- Department of Radiology, University of Texas Southwestern
Medical Center, Dallas, Texas, USA
| | - Chalermchai Khemtong
- Advanced Imaging Research Center, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
- Department of Radiology, University of Texas Southwestern
Medical Center, Dallas, Texas, USA
| | - Michael T. Kinter
- Aging and Metabolism Research Program, Oklahoma Medical
Research Foundation, Oklahoma City, Oklahoma, USA
| | - Wilson Lek Wen Tan
- Cardiovascular Research Institute, National University
Health Systems, Singapore, Genome Institute of Singapore, Singapore
| | - Chukwuemeka George Anene-Nzelu
- Cardiovascular Research Institute, National University
Health Systems, Singapore, Genome Institute of Singapore, Singapore
| | - Roger Sik-Yin Foo
- Cardiovascular Research Institute, National University
Health Systems, Singapore, Genome Institute of Singapore, Singapore
| | - Ngoc Uyen Nhi Nguyen
- Department of Internal Medicine, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
| | - Shujuan Li
- Department of Internal Medicine, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
- Department of Pediatric Cardiology, the First Affiliated
Hospital of Sun Yat-sen University, Guangzhou, China
- NHC Key Laboratory of Assisted Circulation (Sun Yat-sen
University), Guangzhou, China
| | - Mahmoud Salama Ahmed
- Department of Internal Medicine, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
| | - Waleed M. Elhelaly
- Department of Internal Medicine, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
| | - Salim Abdisalaam
- Department of Radiation Oncology, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
| | - Aroumougame Asaithamby
- Department of Radiation Oncology, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
| | - Chao Xing
- McDermontt Center for Human Growth and Development,
University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Mohammed Kanchwala
- McDermontt Center for Human Growth and Development,
University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Goncalo Vale
- Center for Human Nutrition, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
| | - Kaitlyn M. Eckert
- Center for Human Nutrition, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
| | - Matthew A Mitsche
- Center for Human Nutrition, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
| | - Jeffrey G. McDonald
- Center for Human Nutrition, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
- Department of Molecular Genetics, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
| | - Joseph A. Hill
- Department of Internal Medicine, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
| | - Linzhang Huang
- Center for Pulmonary and Vascular Biology, Department of
Pediatrics, University of Texas Southwestern Medical Center, Dallas, Texas,
USA
| | - Philip W. Shaul
- Center for Pulmonary and Vascular Biology, Department of
Pediatrics, University of Texas Southwestern Medical Center, Dallas, Texas,
USA
| | - Luke I. Szweda
- Department of Internal Medicine, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
| | - Hesham A. Sadek
- Department of Internal Medicine, University of Texas
Southwestern Medical Center, Dallas, Texas, USA
- Center for Regenerative Science and Medicine, University
of Texas Southwestern Medical Center, Dallas, Texas, USA
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Pereira AHM, Cardoso AC, Consonni SR, Oliveira RR, Saito A, Vaggione MLB, Matos-Souza JR, Carazzolle MF, Gonçalves A, Fernandes JL, Ribeiro GCA, Lopes MM, Molkentin JD, Franchini KG. MEF2C repressor variant deregulation leads to cell cycle re-entry and development of heart failure. EBioMedicine 2020; 51:102571. [PMID: 31911274 PMCID: PMC6948164 DOI: 10.1016/j.ebiom.2019.11.032] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 11/07/2019] [Accepted: 11/20/2019] [Indexed: 12/11/2022] Open
Abstract
Background A pathophysiological link exists between dysregulation of MEF2C transcription factors and heart failure (HF), but the underlying mechanisms remain elusive. Alternative splicing of MEF2C exons α, β and γ provides transcript diversity with gene activation or repression functionalities. Methods Neonatal and adult rat ventricular myocytes were used to overexpress MEF2C splicing variants γ+ (repressor) or γ-, or the inactive MEF2Cγ+23/24 (K23T/R24L). Phenotypic alterations in cardiomyocytes were determined by confocal and electron microscopy, flow cytometry and DNA microarray. We used transgenic mice with cardiac-specific overexpression of MEF2Cγ+ or MEF2Cγ− to explore the impact of MEF2C variants in cardiac phenotype. Samples of non-infarcted areas of the left ventricle from patients and mouse model of myocardial infarction were used to detect the expression of MEF2Cγ+ in failing hearts. Findings We demonstrate a previously unrealized upregulation of the transrepressor MEF2Cγ+ isoform in human and mouse failing hearts. We show that adenovirus-mediated overexpression of MEF2Cγ+ downregulates multiple MEF2-target genes, and drives incomplete cell-cycle reentry, partial dedifferentiation and apoptosis in the neonatal and adult rat. None of these changes was observed in cardiomyocytes overexpressing MEF2Cγ-. Transgenic mice overexpressing MEF2Cγ+, but not the MEF2Cγ-, developed dilated cardiomyopathy, correlated to cell-cycle reentry and apoptosis of cardiomyocytes. Interpretation Our results provide a mechanistic link between MEF2Cγ+ and deleterious abnormalities in cardiomyocytes, supporting the notion that splicing dysregulation in MEF2C towards the selection of the MEF2Cγ+ variant contributes to the pathogenesis of HF by promoting cardiomyocyte dropout. Funding São Paulo Research Foundation (FAPESP); Brazilian National Research Council (CNPq).
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Affiliation(s)
- Ana Helena M Pereira
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 13083-970 Campinas, Sao Paulo, Brazil
| | - Alisson C Cardoso
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 13083-970 Campinas, Sao Paulo, Brazil
| | - Silvio R Consonni
- Department of Biochemistry and Tissue Biology, University of Campinas, Campinas, Brazil
| | - Renata R Oliveira
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 13083-970 Campinas, Sao Paulo, Brazil
| | - Angela Saito
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 13083-970 Campinas, Sao Paulo, Brazil
| | - Maria Luisa B Vaggione
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 13083-970 Campinas, Sao Paulo, Brazil
| | - Jose R Matos-Souza
- Department of Internal Medicine, University of Campinas, Campinas, Brazil
| | | | - Anderson Gonçalves
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 13083-970 Campinas, Sao Paulo, Brazil
| | | | | | | | - Jeffery D Molkentin
- Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, USA
| | - Kleber G Franchini
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 13083-970 Campinas, Sao Paulo, Brazil; Department of Internal Medicine, University of Campinas, Campinas, Brazil.
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Elhelaly WM, Cardoso AC, Pereira AHM, Elnawasany A, Ebrahimi S, Nakada Y, Sadek HA. C-Kit Cells Do Not Significantly Contribute to Cardiomyogenesis During Neonatal Heart Regeneration. Circulation 2019; 139:559-561. [PMID: 30664377 DOI: 10.1161/circulationaha.117.033150] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Waleed M Elhelaly
- Department of Internal Medicine and Center for Regenerative Science and Medicine, The University of Texas Southwestern Medical Center, Dallas (W.M.E., A.C.C., A.H.M.P., A.E., S.E., Y.N., H.A.S.)
| | - Alisson C Cardoso
- Department of Internal Medicine and Center for Regenerative Science and Medicine, The University of Texas Southwestern Medical Center, Dallas (W.M.E., A.C.C., A.H.M.P., A.E., S.E., Y.N., H.A.S.).,Brazilian National Laboratory for Biosciences, Center for Research in Energy and Materials, Campinas (A.C.C., A.H.M.P.)
| | - Ana Helena M Pereira
- Department of Internal Medicine and Center for Regenerative Science and Medicine, The University of Texas Southwestern Medical Center, Dallas (W.M.E., A.C.C., A.H.M.P., A.E., S.E., Y.N., H.A.S.).,Brazilian National Laboratory for Biosciences, Center for Research in Energy and Materials, Campinas (A.C.C., A.H.M.P.)
| | - Abdallah Elnawasany
- Department of Internal Medicine and Center for Regenerative Science and Medicine, The University of Texas Southwestern Medical Center, Dallas (W.M.E., A.C.C., A.H.M.P., A.E., S.E., Y.N., H.A.S.)
| | - Shayda Ebrahimi
- Department of Internal Medicine and Center for Regenerative Science and Medicine, The University of Texas Southwestern Medical Center, Dallas (W.M.E., A.C.C., A.H.M.P., A.E., S.E., Y.N., H.A.S.)
| | - Yuji Nakada
- Department of Internal Medicine and Center for Regenerative Science and Medicine, The University of Texas Southwestern Medical Center, Dallas (W.M.E., A.C.C., A.H.M.P., A.E., S.E., Y.N., H.A.S.)
| | - Hesham A Sadek
- Department of Internal Medicine and Center for Regenerative Science and Medicine, The University of Texas Southwestern Medical Center, Dallas (W.M.E., A.C.C., A.H.M.P., A.E., S.E., Y.N., H.A.S.)
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Xiao F, Savla J, Cardoso AC, Periera AM, Muralidhar S, Canseco D, Sadek HA. Abstract 425: Role of MLF1 in Cardiomyocyte Cell Cycle Regulation. Circ Res 2019. [DOI: 10.1161/res.125.suppl_1.425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The neonatal mammalian heart is capable of significant regeneration after cardiac injury. However, that ability is lost in the early postnatal period, coinciding with the development of cardiomyocyte cell cycle arrest. Myeloid leukemia factor 1 (MLF1) is a protein expressed in hematopoietic cells, skeletal muscle and cardiac muscle. In hematopoietic cells, MLF1 is thought to be a negative cell cycle regulator, possibly acting through a p53-dependent mechanism. However, the role of MLF1 in the cardiovascular system is not well understood. Here, we describe MLF1 as a regulator of cardiomyocyte cell cycle progression. We first examined the expression pattern of MLF1 in neonatal mouse heart. MLF1 protein specifically expresses in the nucleus, and the expression level increases from P1 to P7 as revealed by quantitative PCR and Western Blot. To elucidate a potential role of Mlf1 in cardiomyocyte proliferation, we silenced Mlf1 in neonatal rat ventricle myocytes (NRVMs) which showed increased cardiomyocyte proliferation by staining with a mitosis marker phospho-Histone 3 (pH3). Then we generated an inducible cardiac-specific Mlf1 knockout mouse model and assessed for the prolongation of the proliferative window by echocardiography, cell size analysis, and immunostaining for cell cycle markers. Staining the Mlf1 KO hearts with proliferation markers, pH3 to determine mitosis and Aurora B kinase to determine cytokinesis, indicated that deletion of Mlf1 resulted in increased cardiomyocyte proliferation. It also showed improvement in left ventricular systolic function following myocardial infarction by echocardiography. In contrast, overexpression of MLF1 in heart showed decreased cardiac function as quantified by ejection fraction. These results identify MLF1 as a negative cell cycle regulator of cardiomyocyte proliferation.
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Affiliation(s)
- Feng Xiao
- UT Southwestern Med Cntr, Dallas, TX
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Grizzetti B, Liquete C, Pistocchi A, Vigiak O, Zulian G, Bouraoui F, De Roo A, Cardoso AC. Relationship between ecological condition and ecosystem services in European rivers, lakes and coastal waters. Sci Total Environ 2019; 671:452-465. [PMID: 30933801 PMCID: PMC6509285 DOI: 10.1016/j.scitotenv.2019.03.155] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 03/08/2019] [Accepted: 03/10/2019] [Indexed: 05/05/2023]
Abstract
We quantify main ecosystem services (i.e. the contribution of ecosystems to human well-being) provided by rivers, lakes, coastal waters and connected ecosystems (riparian areas and floodplains) in Europe, including water provisioning, water purification, erosion prevention, flood protection, coastal protection, and recreation. We show European maps of ecosystem service capacity, flow (actual use), sustainability and efficiency. Then we explore the relationship between the services and the ecosystem condition at the European scale, considering the ecological status of aquatic ecosystems, reported under the EU Water Framework Directive, as a measure of the ecosystem integrity and biodiversity. Our results indicate that a higher delivery of the regulating and cultural ecosystem services analysed is mostly correlated with better conditions of aquatic ecosystems. Conversely, the use of provisioning services can result in pressures on the ecosystem. This suggests the importance of maintaining good ecological condition of aquatic ecosystems to ensure the delivery of ecosystem services in the future. These results at the continental scale, although limited to the ecosystem services under analysis, might be relevant to consider when investing in the protection and restoration of aquatic ecosystems called for by the current EU water policy and Biodiversity Strategy and by the United Nations Sustainable Development Goals.
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Affiliation(s)
- B Grizzetti
- European Commission Joint Research Centre (JRC), Italy.
| | - C Liquete
- European Commission Joint Research Centre (JRC), Italy; European Commission DG Environment, Brussels, Belgium
| | - A Pistocchi
- European Commission Joint Research Centre (JRC), Italy
| | - O Vigiak
- European Commission Joint Research Centre (JRC), Italy; Ludwig-Maximilians-Universitaet Muenchen, Department of Geography, Munich, Germany
| | - G Zulian
- European Commission Joint Research Centre (JRC), Italy
| | - F Bouraoui
- European Commission Joint Research Centre (JRC), Italy
| | - A De Roo
- European Commission Joint Research Centre (JRC), Italy
| | - A C Cardoso
- European Commission Joint Research Centre (JRC), Italy
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Cardoso AC, Perez RM, de Figueiredo-Mendes C, Carvalho Leite N, Moraes-Coelho HS, Villela-Nogueira CA. Prevalence and predictive factors of moderate/severe liver steatosis in chronic hepatitis C (CHC) infected patients evaluated with controlled attenuation parameter (CAP). J Viral Hepat 2018; 25:1244-1250. [PMID: 29768686 DOI: 10.1111/jvh.12930] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Accepted: 04/16/2018] [Indexed: 12/15/2022]
Abstract
A novel controlled attenuation parameter (CAP) using FibroScan® has been developed for assessment of liver steatosis. The aim was to evaluate the frequency and associated factors for moderate/severe steatosis evaluated by CAP in CHC patients submitted to transient elastography (TE) by FibroScan® . CHC patients underwent TE with CAP evaluation. The classification of steatosis was defined as: CAP < 222 dB/m = S0; CAP ≥ 222 dB/m and <233dB/m = S1; ≥233 dB/m < 290dB/m = S2 and >= 290 dB/m = S3. The prevalence of moderate/severe steatosis (CAP ≥ S2) and the related independent factors were identified by a logistic regression analysis. A significance level of 5% was adopted. 1104 CHC patients, 85% genotype-1 were included (mean age 55 ± 11 years; 46% male, mean BMI 25 ± 4 Kg/m2 ). Systemic arterial hypertension and type 2 diabetes mellitus prevalences were 39% and 17%, respectively. Liver stiffness measurement ≥ 9.5 kPa was observed in 39% of patients and steatosis was identified in 50% (S1 = 7%, S2 = 28% and S3 = 15%). The variables independently associated with moderate/severe steatosis were: male gender (OR=1.35; P = .037; 95% CI:1.01-1.81); systemic arterial hypertension (OR=1.57; P = .002; 95% CI:1.17-2.10) and BMI (OR=1.17; P < .01;95% CI:1.12-1.22). In conclusion, when CAP was adopted as a tool to detect steatosis, genotype 1 CHC patients presented a high prevalence of moderate/advanced steatosis. In these patients, liver steatosis was associated mostly to metabolic factors (arterial hypertension and high BMI).
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Affiliation(s)
- A C Cardoso
- Hepatology Unit, Hospital Universitário Clementino Fraga Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - R M Perez
- Hepatology Unit, Hospital Universitário Clementino Fraga Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.,Gastroenterology Department, University of the State of Rio de Janeiro, Rio de Janeiro, Brazil.,D'Or Institute for Research and Education (IDOR), Rio de Janeiro, Brazil
| | | | - N Carvalho Leite
- Hepatology Unit, Hospital Universitário Clementino Fraga Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - H S Moraes-Coelho
- Hepatology Unit, Hospital Universitário Clementino Fraga Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - C A Villela-Nogueira
- Hepatology Unit, Hospital Universitário Clementino Fraga Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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Karlas T, Petroff D, Sasso M, Fan JG, Mi YQ, de Lédinghen V, Kumar M, Lupsor-Platon M, Han KH, Cardoso AC, Ferraioli G, Chan WK, Wong VWS, Myers RP, Chayama K, Friedrich-Rust M, Beaugrand M, Shen F, Hiriart JB, Sarin SK, Badea R, Lee HW, Marcellin P, Filice C, Mahadeva S, Wong GLH, Crotty P, Masaki K, Bojunga J, Bedossa P, Keim V, Wiegand J. Impact of controlled attenuation parameter on detecting fibrosis using liver stiffness measurement. Aliment Pharmacol Ther 2018; 47:989-1000. [PMID: 29446106 DOI: 10.1111/apt.14529] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 11/19/2017] [Accepted: 01/01/2018] [Indexed: 12/11/2022]
Abstract
BACKGROUND Liver fibrosis is often accompanied by steatosis, particularly in patients with non-alcoholic fatty liver disease (NAFLD), and its non-invasive characterisation is of utmost importance. Vibration-controlled transient elastography is the non-invasive method of choice; however, recent research suggests that steatosis may influence its diagnostic performance. Controlled Attenuation Parameter (CAP) added to transient elastography enables simultaneous assessment of steatosis and fibrosis. AIM To determine how to use CAP in interpreting liver stiffness measurements. METHODS This is a secondary analysis of data from an individual patient data meta-analysis on CAP. The main exclusion criteria for the current analysis were unknown aetiology, unreliable elastography measurement and data already used for the same research question. Aetiology-specific liver stiffness measurement cut-offs were determined and used to estimate positive and negative predictive values (PPV/NPV) with logistic regression as functions of CAP. RESULTS Two thousand and fifty eight patients fulfilled the inclusion criteria (37% women, 18% NAFLD/NASH, 42% HBV, 40% HCV, 51% significant fibrosis ≥ F2). Youden optimised cut-offs were only sufficient for ruling out cirrhosis (NPV of 98%). With sensitivity and specificity-optimised cut-offs, NPV for ruling out significant fibrosis was moderate (70%) and could be improved slightly through consideration of CAP. PPV for significant fibrosis and cirrhosis were 68% and 55% respectively, despite specificity-optimised cut-offs for cirrhosis. CONCLUSIONS Liver stiffness measurement values below aetiology-specific cut-offs are very useful for ruling out cirrhosis, and to a lesser extent for ruling out significant fibrosis. In the case of the latter, Controlled Attenuation Parameter can improve interpretation slightly. Even if cut-offs are very high, liver stiffness measurements are not very reliable for ruling in fibrosis or cirrhosis.
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Oliveira ES, Pereira AH, Cardoso AC, Franchini KG, Bassani JW, Bassani RA. Atrial chronotropic reactivity to catecholamines in neonatal rats: Contribution of β-adrenoceptor subtypes. Eur J Pharmacol 2015; 764:385-394. [DOI: 10.1016/j.ejphar.2015.07.031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Revised: 06/19/2015] [Accepted: 07/13/2015] [Indexed: 10/23/2022]
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Pereira MBM, Santos AM, Gonçalves DC, Cardoso AC, Consonni SR, Gozzo FC, Oliveira PS, Pereira AHM, Figueiredo AR, Tiroli-Cepeda AO, Ramos CHI, de Thomaz AA, Cesar CL, Franchini KG. αB-crystallin interacts with and prevents stress-activated proteolysis of focal adhesion kinase by calpain in cardiomyocytes. Nat Commun 2014; 5:5159. [PMID: 25319025 DOI: 10.1038/ncomms6159] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Accepted: 09/05/2014] [Indexed: 12/14/2022] Open
Abstract
Focal adhesion kinase (FAK) contributes to cellular homeostasis under stress conditions. Here we show that αB-crystallin interacts with and confers protection to FAK against calpain-mediated proteolysis in cardiomyocytes. A hydrophobic patch mapped between helices 1 and 4 of the FAK FAT domain was found to bind to the β4-β8 groove of αB-crystallin. Such an interaction requires FAK tyrosine 925 and is enhanced following its phosphorylation by Src, which occurs upon FAK stimulation. αB-crystallin silencing results in calpain-dependent FAK depletion and in the increased apoptosis of cardiomyocytes in response to mechanical stress. FAK overexpression protects cardiomyocytes depleted of αB-crystallin against the stretch-induced apoptosis. Consistently, load-induced apoptosis is blunted in the hearts from cardiac-specific FAK transgenic mice transiently depleted of αB-crystallin by RNA interference. These studies define a role for αB-crystallin in controlling FAK function and cardiomyocyte survival through the prevention of calpain-mediated degradation of FAK.
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Affiliation(s)
- Michelle B M Pereira
- Brazilian National Laboratory for Biosciences, Center for Research in Energy and Materials, Campinas, São Paulo 13084-971, Brazil
| | - Aline M Santos
- Brazilian National Laboratory for Biosciences, Center for Research in Energy and Materials, Campinas, São Paulo 13084-971, Brazil
| | - Danieli C Gonçalves
- Brazilian National Laboratory for Biosciences, Center for Research in Energy and Materials, Campinas, São Paulo 13084-971, Brazil
| | - Alisson C Cardoso
- Brazilian National Laboratory for Biosciences, Center for Research in Energy and Materials, Campinas, São Paulo 13084-971, Brazil
| | - Sílvio R Consonni
- Brazilian National Laboratory for Biosciences, Center for Research in Energy and Materials, Campinas, São Paulo 13084-971, Brazil
| | - Fabio C Gozzo
- Chemistry Institute, University of Campinas, Campinas, São Paulo 13083-970, Brazil
| | - Paulo S Oliveira
- Brazilian National Laboratory for Biosciences, Center for Research in Energy and Materials, Campinas, São Paulo 13084-971, Brazil
| | - Ana Helena M Pereira
- Brazilian National Laboratory for Biosciences, Center for Research in Energy and Materials, Campinas, São Paulo 13084-971, Brazil
| | - Alana R Figueiredo
- Chemistry Institute, University of Campinas, Campinas, São Paulo 13083-970, Brazil
| | - Ana O Tiroli-Cepeda
- Chemistry Institute, University of Campinas, Campinas, São Paulo 13083-970, Brazil
| | - Carlos H I Ramos
- Chemistry Institute, University of Campinas, Campinas, São Paulo 13083-970, Brazil
| | - André A de Thomaz
- Gleb Wataghin Physics Institute, University of Campinas, Campinas, São Paulo 13083-859, Brazil
| | - Carlos L Cesar
- Gleb Wataghin Physics Institute, University of Campinas, Campinas, São Paulo 13083-859, Brazil
| | - Kleber G Franchini
- 1] Brazilian National Laboratory for Biosciences, Center for Research in Energy and Materials, Campinas, São Paulo 13084-971, Brazil [2] Department of Internal Medicine, School of Medicine, University of Campinas, Campinas, São Paulo 13081-970, Brazil
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dos Santos AM, Pereira MB, Gonçalves DC, Cardoso AC, Consonni SR, Gozzo FC, Oliveira PS, Figueiredo AR, de Thomaz AA, Cesar CL, Ramos CH, Franchini KG. Abstract 187: αB-crystallin Interacts And Prevents Stress-activated Proteolysis Of Focal Adhesion Kinase In Cardiomyocytes. Circ Res 2014. [DOI: 10.1161/res.115.suppl_1.187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Focal adhesion kinase (FAK) contributes to cellular homeostasis under stress conditions. Here, we show that αB-crystallin confers protection to FAK against calpain-mediated proteolysis under mechanical stress in cardiomyocytes. Biochemical assays, chemical cross-linking coupled to mass spectrometry experiments, mutational analyses and Förster resonance energy transfer (FRET) were combined to investigate the basis of FAK and αB-crystallin interaction. A hydrophobic patch mapped between helices 1 and 4 of the FAK FAT domain was found to bind to the β4-β8 groove of αB-crystallin. Such an interaction requires FAK tyrosine 925 and is enhanced following its phosphorylation by Src, which occurs upon FAK stimulation by mechanical stress. αB-crystallin silencing results in calpain-dependent FAK depletion and in increased apoptosis of cardiomyocytes. The overexpression of a myc-FAK construct or treatment with a calpain inhibitor (E64) restored the survival of cardiomyocytes depleted of αB-crystallin. The association between FAK and αB-crystallin was also demonstrated to occur in response to pressure overload in rat left ventricle. The myocardial depletion of αB-crystallin by siRNA results in enhanced apoptosis of cardiomyocytes and myocardial fibrosis in overloaded hearts. These alterations were markedly attenuated in the overloaded left ventricles of transgenic mice with cardiac specific FAK expression. These findings define a novel mechanism by which αB-crystallin controls FAK function, with impact on cardiomyocyte survival and cardiac remodelling in response to stress.
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Affiliation(s)
- Aline M dos Santos
- Brazilian National Laboratory for Biosciences, Cntr for Rsch in Energy and Materials, Campinas, Brazil
| | - Michelle B Pereira
- Brazilian National Laboratory for Biosciences, Cntr for Rsch in Energy and Materials, Campinas, Brazil
| | - Danieli C Gonçalves
- Brazilian National Laboratory for Biosciences, Cntr for Rsch in Energy and Materials, Campinas, Brazil
| | - Alisson C Cardoso
- Brazilian National Laboratory for Biosciences, Cntr for Rsch in Energy and Materials, Campinas, Brazil
| | - Silvio R Consonni
- Brazilian National Laboratory for Biosciences, Cntr for Rsch in Energy and Materials, Campinas, Brazil
| | - Fabio C Gozzo
- Brazilian National Laboratory for Biosciences, Cntr for Rsch in Energy and Materials, Campinas, Brazil
| | - Paulo S Oliveira
- Brazilian National Laboratory for Biosciences, Cntr for Rsch in Energy and Materials, Campinas, Brazil
| | - Alana R Figueiredo
- Brazilian National Laboratory for Biosciences, Cntr for Rsch in Energy and Materials, Campinas, Brazil
| | - André A de Thomaz
- Gleb Wataghin Physics Institute, Univ of Campinas, Campinas, SP, 13083-859, Brazil, Campinas, Brazil
| | - Carlos L Cesar
- Gleb Wataghin Physics Institute, Univ of Campinas, Campinas, SP, 13083-859, Brazil, Campinas, Brazil
| | - Carlos H Ramos
- Chemistry Institute, Univ of Campinas, Campinas, SP, 13083-970, Brazil, Campinas, Brazil
| | - Kleber G Franchini
- Brazilian National Laboratory for Biosciences, Cntr for Rsch in Energy and Materials, Campinas, Brazil
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Koscky Paier CR, Cardoso AC, Brenneli TL, Honorato RV, Gozzo FC, Oliveira PS, Franchini KG. Abstract 307: Structural Characterization of Calcineurin A-Calsarcin 1 Assembly. Circ Res 2014. [DOI: 10.1161/res.115.suppl_1.307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Signaling by the calcium-dependent phosphatase calcineurin (Cn) plays key roles in regulating cardiac development, hypertrophy, and pathological remodeling. Cn binds to and is negatively regulated by calsarcins (CS), a family of muscle-specific proteins. However, the molecular mechanisms involved in the inhibition of Cn by CS remain unclear. Understanding the architecture and structure of Cn-CS complex is critical to unravel the regulation of Cn by CS. Here we combined biochemical assays, chemical cross-linking coupled to mass spectrometry experiments (MS/MS), mutational analysis and a modeling strategy for structural characterization of CnA-CS1 assembly. The MS/MS data obtained from the cross-linked peptides of both proteins were used to guide an in silico docking of their polypeptide models. The protein complex models with the smallest estimated binding energy were clustered according to structural similarity and submitted to molecular dynamics simulation. The interacting surface of CnA was mapped in a pocket between the 1st and 3rd α-helixes and surrounding loops, while the corresponding surface of CS1 was mapped to the carboxyterminal loops within the Leu179-Phe185, Phe195-Ser199 and Thr250-Leu264 regions. Notably, the region of CnA that interacts with CS1 was found to be located in close proximity, but not coincident, to the β-sheet 14, the main binding site for the PxIxIT sequence of NFAT. Experiments performed with several CnA (FLAG-CnA) and CS1 (myc-CS1) mutants were used to validate the structural model of the CnA-CS1 assembly. The Lys40 (CnA) and Glu254 (CS1) residues were identified as critical for the complex stability. The model that emerges from this study supports the notion that CS1 interacts with an allosteric site to inhibit the activity of CnA. Alternatively, the close proximity of the CS1 to NFAT interacting site supports an interference of CS1 on the ability of CnA to bind and activate NFAT.
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Affiliation(s)
| | | | | | | | - Fábio C Gozzo
- Chemistry Institute, Univ of Campinas, Campinas, Brazil
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Cardoso AC, Pereira AH, Ambrosio AL, Consonni SR, Dias SM, Franchini KG. Abstract 304: Crystal Structure Of Fak/mef2 Complex Reveals The Role Of Fak In The Regulation Of Mef2 Transcription Factor. Circ Res 2014. [DOI: 10.1161/res.115.suppl_1.304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Members of MEF2 (Myocyte Enhancer Factor 2) family of transcription factors are major regulators of cardiac development and homeostasis. Their functions are regulated at several levels, including the association with a variety of protein partners. We have previously shown that FAK (Focal Adhesion Kinase) regulates the stretch-induced activation of MEF2 in cardiomyocytes. But, the molecular mechanisms, involved in this process, are unclear. Here, we integrated biochemical, imaging and structural analyses to characterize a novel interaction between MEF2 and FAK. An association between MEF2 and FAK was detected by co-immunoprecipitation in the extracts of stretched cardiomyocytes (10%, 60Hz, 2 hours). MEF2 and FAK staining were co-localized in the nuclei of stretched cells. Pull down assays indicated that the Focal Adhesion Targeting (FAT) domain is sufficient to confer FAK interaction with MEF2. Gene reporter assays indicated that the interaction with FAK enhances the MEF2C transcriptional activity in cultured cardiomyocytes. Also, we present a 2.9-Å X-ray crystal structure for the FAK_FAT domain bound to MEF2C (1-95), comprised by the MADS box/MEF2 domain. The structural information, when used in combination with biochemical studies, small-angle X-ray scattering (SAXS) data and reporter gene assay, lead to a mechanistic model describing how FAK binds to MEF2C and stimulates its transcription function in cardiomyocytes. We further validated this model by showing that the binding of FAK to MEF2C is essential for the hypertrophy of cardiomyocyte in response to mechanical stress. Our results present FAK as a new positive regulator of MEF2, implicated in the fine control of the signal transduction between focal adhesions and the nucleus of cardiac myocytes during mechanical stress.
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Affiliation(s)
- Alisson C Cardoso
- Brazilian National Laboratory for Biosciences, Cntr for Rsch in Energy and Materials, Campinas, Brazil
| | - Ana H Pereira
- Brazilian National Laboratory for Biosciences, Cntr for Rsch in Energy and Materials, Campinas, Brazil
| | - Andre L Ambrosio
- Brazilian National Laboratory for Biosciences, Cntr for Rsch in Energy and Materials, Campinas, Brazil
| | - Silvio R Consonni
- Brazilian National Laboratory for Biosciences, Cntr for Rsch in Energy and Materials, Campinas, Brazil
| | - Sandra M Dias
- Brazilian National Laboratory for Biosciences, Cntr for Rsch in Energy and Materials, Campinas, Brazil
| | - Kleber G Franchini
- Brazilian National Laboratory for Biosciences, Cntr for Rsch in Energy and Materials, Campinas, Brazil
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Tornatore TF, Dalla Costa AP, Clemente CFMZ, Judice C, Rocco SA, Calegari VC, Cardoso L, Cardoso AC, Gonçalves A, Franchini KG. A role for focal adhesion kinase in cardiac mitochondrial biogenesis induced by mechanical stress. Am J Physiol Heart Circ Physiol 2010; 300:H902-12. [PMID: 21148763 DOI: 10.1152/ajpheart.00319.2010] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We studied the implication of focal adhesion kinase (FAK) in cardiac mitochondrial biogenesis induced by mechanical stress. Prolonged stretching (2-12 h) of neonatal rat ventricular myocytes (NRVM) upregulated the main components of mitochondrial transcription cascade [peroxisome proliferator-activated receptor coactivator-1 (PGC-1α), nuclear respiratory factor (NRF-1), and mitochondrial transcription factor A]. Concomitantly, prolonged stretching enhanced mitochondrial biogenesis [copy number of mitochondrial DNA (mtDNA), content of the subunit IV of cytochrome oxidase, and mitochondrial staining-green fluorescence intensity of Mitotracker green] and induced the hypertrophic growth (cell size and atrial natriuretic peptide transcripts) of NRVM. Furthermore, the stretching of NRVM enhanced phosphorylation, nuclear localization, and association of FAK with PGC-1α. Recombinant FAK COOH-terminal, but not the NH(2)-terminal or kinase domain, precipitated PGC-1α from nuclear extracts of NRVM. Depletion of FAK by RNA interference suppressed the upregulation of PGC-1α and NRF-1 and markedly attenuated the enhanced mitochondrial biogenesis and hypertrophic growth of stretched NRVM. In the context of energy metabolism, FAK depletion became manifest by a reduction of ATP levels in stretched NRVM. Complementary studies in adult mice left ventricle demonstrated that pressure overload upregulated PGC-1α, NRF-1, and mtDNA. In vivo FAK silencing transiently attenuated the upregulation of PGC-1α, NRF-1, and mtDNA, as well as the left ventricular hypertrophy induced by pressure overload. In conclusion, activation of FAK signaling seems to be important for conferring enhanced mitochondrial biogenesis coupled to the hypertrophic growth of cardiomyocytes in response to mechanical stress, via control of mitochondrial transcription cascade.
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Affiliation(s)
- Thais F Tornatore
- Department of Internal Medicine, School of Medicine, State University of Campinas, Campinas, Sao Paulo, Brazil
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15
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Pereira AHM, Clemente CFMZ, Cardoso AC, Theizen TH, Rocco SA, Judice CC, Guido MC, Pascoal VDB, Lopes-Cendes I, Souza JRM, Franchini KG. MEF2C silencing attenuates load-induced left ventricular hypertrophy by modulating mTOR/S6K pathway in mice. PLoS One 2009; 4:e8472. [PMID: 20041152 PMCID: PMC2794538 DOI: 10.1371/journal.pone.0008472] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2009] [Accepted: 11/17/2009] [Indexed: 11/24/2022] Open
Abstract
Background The activation of the members of the myocyte enhancer factor-2 family (MEF2A, B, C and D) of transcription factors promotes cardiac hypertrophy and failure. However, the role of its individual components in the pathogenesis of cardiac hypertrophy remains unclear. Methodology/Principal Findings In this study, we investigated whether MEF2C plays a role in mediating the left ventricular hypertrophy by pressure overload in mice. The knockdown of myocardial MEF2C induced by specific small interfering RNA (siRNA) has been shown to attenuate hypertrophy, interstitial fibrosis and the rise of ANP levels in aortic banded mice. We detected that the depletion of MEF2C also results in lowered levels of both PGC-1α and mitochondrial DNA in the overloaded left ventricle, associated with enhanced AMP:ATP ratio. Additionally, MEF2C depletion was accompanied by defective activation of S6K in response to pressure overload. Treatment with the amino acid leucine stimulated S6K and suppressed the attenuation of left ventricular hypertrophy and fibrosis in the aforementioned aortic banded mice. Conclusion/Significance These findings represent new evidences that MEF2C depletion attenuates the hypertrophic responses to mechanical stress and highlight the potential of MEF2C to be a target for new therapies to cardiac hypertrophy and failure.
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Affiliation(s)
- Ana Helena M. Pereira
- Department of Internal Medicine, School of Medicine, State University of Campinas, Campinas, São Paulo, Brazil
| | - Carolina F. M. Z. Clemente
- Department of Internal Medicine, School of Medicine, State University of Campinas, Campinas, São Paulo, Brazil
| | - Alisson C. Cardoso
- Department of Internal Medicine, School of Medicine, State University of Campinas, Campinas, São Paulo, Brazil
| | - Thais H. Theizen
- Department of Internal Medicine, School of Medicine, State University of Campinas, Campinas, São Paulo, Brazil
| | - Silvana A. Rocco
- Department of Internal Medicine, School of Medicine, State University of Campinas, Campinas, São Paulo, Brazil
| | - Carla C. Judice
- Department of Internal Medicine, School of Medicine, State University of Campinas, Campinas, São Paulo, Brazil
| | - Maria Carolina Guido
- Department of Internal Medicine, School of Medicine, State University of Campinas, Campinas, São Paulo, Brazil
| | - Vinícius D. B. Pascoal
- Department of Medical Genetics, School of Medicine, State University of Campinas, Campinas, São Paulo, Brazil
| | - Iscia Lopes-Cendes
- Department of Medical Genetics, School of Medicine, State University of Campinas, Campinas, São Paulo, Brazil
| | - José Roberto M. Souza
- Department of Internal Medicine, School of Medicine, State University of Campinas, Campinas, São Paulo, Brazil
| | - Kleber G. Franchini
- Department of Internal Medicine, School of Medicine, State University of Campinas, Campinas, São Paulo, Brazil
- * E-mail:
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Cardoso AC, Judice CC, Deckmann AC, Clemente CF, Pereira AHM, Franchini KG. FAK Interacts With MEF2 and Drives the Stretch‐Induced Activation of an Intronic Enhancer of Phospholamban Gene in Cardiomyocytes. FASEB J 2008. [DOI: 10.1096/fasebj.22.1_supplement.826.5] [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] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Carla C Judice
- Internal MedicineState University of CampinasCampinasBrazil
| | - Ana C Deckmann
- Internal MedicineState University of CampinasCampinasBrazil
| | | | - Ana HM Pereira
- Internal MedicineState University of CampinasCampinasBrazil
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Lopes JF, Dias JM, Cardoso AC, Silva CIV. The water quality of the Ria de Aveiro lagoon, Portugal: from the observations to the implementation of a numerical model. Mar Environ Res 2005; 60:594-628. [PMID: 15996728 DOI: 10.1016/j.marenvres.2005.05.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2004] [Revised: 04/28/2005] [Accepted: 05/05/2005] [Indexed: 05/03/2023]
Abstract
Ria de Aveiro is a very important area of the Portuguese coast, which has been under an increasing anthropogenic pressure for several decades and, contributes to the degradation of the lagoon's water quality. This work presents both a characterisation of the water quality of the Ria de Aveiro lagoon, using physical, chemical and biological experimental data, and an implementation of a numerical model for the water quality of the lagoon. The ultimate goal is to obtain an accurate numerical model able to simulate major water quality features of the lagoon under the influence of different forcing conditions. Data analysis reveals good correlations between the salinity and almost all the water quality variables as well as between the different variables. The maximum biochemical oxygen demand concentration (BOD) depends on the light intensity, the temperature and the river inputs. The main vulnerable areas of the lagoon, from the water quality point of view, seem to be the far end of the main channels, where low dissolved oxygen concentration (DO) and high BOD concentrations are observed. The numerical model of the Ria de Aveiro has reproduced both winter-spring and spring-summer events related to the lagoon water quality as well as its main pattern. Both data and modelling results show that the BOD5 concentrations (where the subscript '5' means that the BOD measurements were conducted for five days, without inhibitor of nitrification) are driven by the river influence, during the winter-spring period, and by the biological activity during the spring-summer period. The DO concentrations show high values in the spring-summer period and smaller concentrations in the winter-spring period at the far end of the lagoon. The application of the model to the study of scenarios has demonstrated the role of nutrients and light in the phytoplankton growth, the relationship between DO and phytoplankton concentrations, as well as the effect of the BOD degradation in the ammonia (NH4) regeneration.
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Affiliation(s)
- J F Lopes
- CESAM, Departamento de Física, Universidade de Aveiro, 3810-193 Aveiro, Portugal.
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Heiskanen AS, van de Bund W, Cardoso AC, Nóges P. Towards good ecological status of surface waters in Europe--interpretation and harmonisation of the concept. Water Sci Technol 2004; 49:169-177. [PMID: 15195435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The Water Framework Directive (WFD) is a new legislative framework to manage, use, protect, and restore surface water and groundwater resources and coastal waters in the European Union (EU). The aim is to ensure sustainable water management and to reach good water quality by 2015. The assessment of the ecological status and setting of the practical management goals require several steps. The process has started with the characterisation of the river basins including identification of surface water bodies and types, and identification of significant anthropogenic pressures and impacts. The water bodies will be classified in five quality classes (high, good, moderate, poor, bad) based on the Ecological Quality Ratio, which is a ratio between reference conditions and measured status of the biological quality elements. The normative criteria for high, good and moderate ecological status described in the WFD need to be made operational because those will be used to set the practical quality targets for surface water management. National ecological assessment systems and classifications will be harmonised through the WFD intercalibration exercise in order to ensure an equal level of ambition in achieving good surface waters status all over Europe.
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Affiliation(s)
- A S Heiskanen
- European Commission, Directorate General Joint Research Centre, Institute of Environment and Sustainability, Inland and Marine Waters Unit, TP 290, I-21020 Ispra, VA, Italy.
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Bonilha L, Marques EL, Carelli EF, Fernandes YB, Cardoso AC, Maldaum MV, Borges G. Risk factors and outcome in 100 patients with aneurysmal subarachnoid hemorrhage. Arq Neuropsiquiatr 2001; 59:676-80. [PMID: 11593263 DOI: 10.1590/s0004-282x2001000500004] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
OBJECTIVE Clinical and surgical outcome of patients with subarachnoid hemorrhage (SAH) due to ruptured aneurysm were assessed in comparison to pre-operative data and risk factors such as previous medical history, clinical presenting condition, CT findings and site of bleeding. METHODS We evaluated 100 consecutive patients with aneurysmal SAH. Gender, color, history of hypertension, smoking habit, site and size of aneurysm, admittance and before surgery Hunt Hess scale, need for cerebro-spinal fluid shunt, presence of complications during the surgical procedure, Glasgow Outcome Scale, presence of vasospasm and of rebleeding were assessed and these data matched to outcome. For statistical analysis, we applied the chi-squared test or Fisher's test using the pondered kappa coefficient. Kruskal-Wallis test was used for comparison of continue variables. Tendency of proportion was analyzed through Cochran-Armitage test. Significance level adopted was 5%. RESULTS Patients studied were mainly white, female, without previous history of hypertension and non-smokers. Upon hospital admittance, grade 2 of Hunt-Hess scale was most frequently observed (34%), while grade 3 of Fisher scale was the most prevalent. Single aneurysms were most frequent at anterior circulation, between 12 and 24 mm. The most frequent Glasgow Outcome Scale observed was 5 (60%). Hunt Hess upon the moment of surgery and presence of complications during surgical procedure showed positive correlation with clinical outcome (p=0.00002 and p=0.001, respectively). Other variables were not significantly correlated to prognosis. Tendency of proportion was observed between Hunt-Hess scale and Fisher scale. CONCLUSION Among variables such as epidemiological data, previous medical history and presenting conditions of patients with ruptured aneurysms, the Hunt-Hess scale upon the moment of surgery and the presence of surgical adversities are statistically related to degree of disability.
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Affiliation(s)
- L Bonilha
- Division of Neurosurgery, Department of Neurology, Faculty of Medical Sciences, State University of Campinas, Campinas, SP, Brazil
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Pepe M, Giardino C, Borsani G, Cardoso AC, Chiaudani G, Premazzi G, Rodari E, Zilioli E. Relationship between apparent optical properties and photosynthetic pigments in the sub-alpine Lake Iseo. Sci Total Environ 2001; 268:31-45. [PMID: 11315745 DOI: 10.1016/s0048-9697(00)00691-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The aim of the present study was the evaluation of methods for estimating the content of bio-physical parameters in lake water on the basis of spectral reflectance measured above water surface, in particular the estimation of chlorophyll-a (chl-a) concentrations. Data sets considered refer to some sampling point located in the sub-alpine meso-eutrophic Lake Iseo, surveyed six times over the period March-July and once in November 1998, as these months were very important for the characterization of the springtime algal bloom, which affect the lake waters yearly. At each point station, limnological observations (chlorophyll, total suspended solids, Secchi disk depth) were conducted simultaneously with optical measurements. The latter consisted of water leaving radiance measured by means of a spectroradiometer above the water surface; moreover, a standard reflector radiance was also measured to obtain the water reflectance. Reflectance spectra were transformed according to two well-documented models and correlated to water quality parameters, to investigate their performances as retrieval algorithms under different conditions and referring to different analytical methods. Results outline the sensitivity of the models to chl-a concentrations, different phytoplankton composition, and the sampling depth.
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Affiliation(s)
- M Pepe
- Remote Sensing Department, IRRS-CNR, Milan, Italy
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Cardoso AC, Canabarro S, Myers SL. Dental erosion: diagnostic-based noninvasive treatment. Pract Periodontics Aesthet Dent 2000; 12:223-8; quiz 230. [PMID: 11404963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
Lesions that result from dental erosion can be difficult to recognize--particularly when abrasion and attrition are also present. Consequently, dental erosion is often misdiagnosed and mistreated by radical restorative modalities that compromise the vitality of the pulp. This article provides clinicians with knowledge concerning the diagnosis of the complex lesions of dental wear and demonstrates the conservative treatment of this condition. Two cases that exhibit marked tooth wear in anterior teeth and their subsequent restoration utilizing occlusal principles and composite resin are presented.
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Affiliation(s)
- A C Cardoso
- University of Santa Catarina, Department of Stomatology-Division of Occlusion, Floreanôpolis, S.C. 88012-200, Brazil.
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Abstract
STUDY DESIGN Four cadavers had cervical foraminotomies performed at noncontiguous levels using either the standard open technique or the microendoscopic technique. OBJECTIVES To evaluate the feasibility of using a minimally invasive technique for posterior decompression of cervical disc disease. SUMMARY OF BACKGROUND DATA Even though the anterior approach is more commonly performed for the treatment of cervical disc disease, the posterior approach has distinct advantages in selected cases of foraminal stenosis and posterolateral disc herniation. Current technique, however, requires extensive muscle dissection, and is, therefore, subject to significant morbidity. METHODS Each of four cadavers had posterior cervical foraminotomies performed using either the MICROENDOSCOPIC (MED) technique, or the standard open technique. Three noncontiguous levels were decompressed using one technique, and the other technique was used for the adjacent contralateral decompression. Each specimen was then evaluated with postoperative myelogram/CT and open dissection. Laminotomy size, length of root decompressed, and percentage of facet removed were measured. RESULTS Average vertical diameter decompression and percentage of facet removed were significantly greater for the MED technique than for the open technique. Transverse diameter of the laminotomy area and the average length of decompressed root were not significantly different between the techniques. CONCLUSION Posterior cervical foraminotomy, using the microendoscopic technique, is technically feasible and may be applicable to the treatment of foraminal stenosis and laterally located cervical disc herniation. Studies in live animals are currently examining techniques for hemostasis.
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Affiliation(s)
- S W Roh
- Department of Neurosurgery, University of Florida, Gainesville, USA
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Wen HT, Rhoton AL, de Oliveira E, Cardoso AC, Tedeschi H, Baccanelli M, Marino R. Microsurgical anatomy of the temporal lobe: part 1: mesial temporal lobe anatomy and its vascular relationships as applied to amygdalohippocampectomy. Neurosurgery 1999; 45:549-91; discussion 591-2. [PMID: 10493377 DOI: 10.1097/00006123-199909000-00028] [Citation(s) in RCA: 126] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
OBJECTIVE We review the anatomy of the mesial temporal lobe region, establishing the relationships among the intraventricular, extraventricular, and surrounding vascular structures and their angiographic characterization. We also demonstrate the clinical application of these anatomic landmarks in an anatomic temporal lobectomy plus amygdalohippocampectomy. METHODS Fifty-two adult cadaveric hemispheres and 12 adult cadaveric heads were studied, using a magnification ranging from 3x to 40x, after perfusion of the arteries and veins with colored latex. RESULTS The intraventricular elements are the hippocampus, fimbria, amygdala, and choroidal fissure; the extraventricular elements are the uncus and parahippocampal and dentate gyri. The uncus has an anterior segment, an apex, and a posterior segment that has an inferior and a posteromedial surface; the uncus is related medially to cisternal elements and laterally to intraventricular elements. The anterior segment is related to the proximal sylvian fissure, internal carotid artery, proximal M1 segment of the middle cerebral artery, proximal cisternal anterior choroidal artery, and amygdala. The apex is related to the oculomotor nerve, uncal recess, and amygdala; the posteromedial surface is related to the P2A segment of the posterior cerebral artery inferiorly, to the distal cisternal anterior choroidal artery superiorly, and to the head of the hippocampus and amygdala intraventricularly. The choroidal fissure is located between the thalamus and fimbria; it begins at the inferior choroidal point behind the head of the hippocampus and constitutes the medial wall of the posterior two-thirds of the temporal horn. CONCLUSION Not only is the knowledge of these relations useful to angiographically characterize the mesial temporal region, but it has also proven to be of extreme value during microsurgeries involving this region.
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Affiliation(s)
- H T Wen
- Institute of Neurological Sciences, São Paulo, Brazil
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Abstract
STATEMENT OF THE PROBLEM Gold screw loosening is a frequent problem that affects dental implants. PURPOSE This study determined the effect of spring washers on gold screw displacements during applied removal torque in dental implants. MATERIAL AND METHODS A 3-unit fixed partial denture was cast in semiprecious alloy and fixed to 2 dental implants with gold-retaining screws. Implants were embedded in acrylic resin and restrained from movement. A miniature load sensor was attached to a torque controller handpiece to accurately measure the time and torque needed to completely loosen the gold screws. Rotational displacements were calculated for 4 experimental setups, involving washers placed on (a) both, (b) the mesial, (c) the distal, and (d) no implants. Screw displacement data were compared between implants in all 4 combinations by means of paired t tests. RESULTS Gold screws with underlying conical spring washers underwent on average up to 35% (14.1 microm) more rotational displacement during applied removal torque than those without washers. CONCLUSION Inclusion of a conical spring washer significantly increased the amount of rotational displacement needed to completely loosen an implant gold retaining screw.
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Affiliation(s)
- T W Korioth
- Minnesota Dental Research Center for Biomaterials and Biomechanics, University of Minnesota, Minneapolis, MN 55455, USA.
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Versluis A, Korioth TW, Cardoso AC. Numerical analysis of a dental implant system preloaded with a washer. Int J Oral Maxillofac Implants 1999; 14:337-41. [PMID: 10379106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023] Open
Abstract
Gold screw loosening is a problem that frequently affects dental implants. The application of a preload has been the main means of preventing loosening. However, this measure has not been able to eliminate its occurrence. In this study the effect of a washer in a Brånemark-type implant on the loosening conditions of the retaining screw was investigated using a finite element simulation. The simulation indicated that a washer may significantly increase the tolerance of a screw against loosening. This is accomplished by increasing the tolerance of the implant against deformation. The addition of a customized washer to a dental implant system may offer a very simple and inexpensive solution for the persistent problem of screw loosening.
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Affiliation(s)
- A Versluis
- Minnesota Dental Research Center for Biomaterials and Biomechanics, Minneapolis 55455, USA.
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Cyrne L, Guerreiro P, Cardoso AC, Rodrigues-Pousada C, Soares H. The Tetrahymena chaperonin subunit CCT eta gene is coexpressed with CCT gamma gene during cilia biogenesis and cell sexual reproduction. FEBS Lett 1996; 383:277-83. [PMID: 8925913 DOI: 10.1016/0014-5793(96)00240-2] [Citation(s) in RCA: 103] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
We report here the cloning and the characterization of the T. pyriformis CCT eta gene (TpCCT eta) and also a partial sequence of the corresponding T. thermophila gene (TtCCT eta). The TpCCt eta gene encodes a protein sharing a 60.3% identity with the mouse CCT eta. We have studied the expression of these genes in Tetrahymena exponentially growing cells, cells regenerating their cilia for different periods and during different stages of the cell sexual reproduction. These genes have similar patterns of expression to those of the previously identified TpCCt gamma gene. Indeed, the Tetrahymena CCT eta and CCT gamma genes are up-regulated at 60-120 min of cilia recovery, and in conjugation when vegetative growth was resumed and cell division took place. Our results seem to indicate that both CCT subunits play an important role in the biogenesis of the newly synthesized cilia of Tetrahymena and during its cell division.
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Affiliation(s)
- L Cyrne
- Laboratório de Genética Molecular, Instituto Gulbenkian de Ciência, Portugal
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Grando LJ, Tames DR, Cardoso AC, Gabilan NH. In vitro study of enamel erosion caused by soft drinks and lemon juice in deciduous teeth analysed by stereomicroscopy and scanning electron microscopy. Caries Res 1996; 30:373-8. [PMID: 8877092 DOI: 10.1159/000262345] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
The erosion caused in vitro by cola-type and guaraná-type beverages (the latter is a soft drink sold in Brazil), and a canned lemon juice on the enamel of human deciduous teeth was analyzed. Morphological analysis of affected enamel was done using stereomicroscopy and scanning electron microscopy (SEM). The harmful effect of all test products on deciduous enamel was clearly demonstrated. Stereomicroscopy showed loss of gloss and an alteration in normal color of enamel, with irregular loss of dental tissue in variable degrees. Such a loss became more serious as the time of incubation increased. Different degrees of solubilization of enamel prisms were demonstrated by SEM, affecting initially the sheaths and the heads of prisms and later their tails. Areas of erosion increased in proportion to the time of incubation. All the products showed a great erosive potential on human deciduous dental enamel.
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Cardoso AC, Spinelli Filho P. Clinical and laboratory techniques for repair of fractured porcelain in fixed prostheses: a case report. Quintessence Int 1994; 25:835-8. [PMID: 7568692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A technique used to repair the abutment tooth of a fixed partial metal-ceramic prosthesis is described. This prosthesis extended from the maxillary central incisor to the left canine. The whole porcelain facial aspect of the central incisor had been fractured. Following a reduction of the metallic structure, a single porcelain crown was bonded to that area. The repair was quick, less expensive and less difficult than removal of the prosthesis and fabrication of a replacement, and provided excellent esthetic and functional results.
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Affiliation(s)
- A C Cardoso
- Department of Stomatology, Federal University of Santa Catarina, Brazil
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Cardoso AC, Arcari GM, Zendron MV, Magini RDS. The use of natural teeth to make removable partial prostheses and complete prostheses: case reports. Quintessence Int 1994; 25:239-43. [PMID: 8058896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Human natural teeth were used in manufacturing two complete prostheses and two partial removable dentures in three patients. All four prostheses continue to function satisfactorily. The practitioner, by utilizing the patient's natural teeth in preference to artificial teeth, achieves an excellent means of solving the patient's esthetic problems.
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Affiliation(s)
- A C Cardoso
- Federal University of Santa Catarina, Brazil
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Baratieri LN, Monteiro Júnior S, Cardoso AC, de Melo Filho JC. Coronal fracture with invasion of the biologic width: a case report. Quintessence Int 1993; 24:85-91. [PMID: 8511269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
To repair a coronal fracture with invasion of the biologic width, flap surgery with osteotomy and osteoplasty localized on the fractured tooth was performed, and the crown was reattached to the tooth remnant with a composite resin system. Results after 6 years revealed optimal periodontal health and reasonable esthetics.
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Affiliation(s)
- L N Baratieri
- Department of Operative Dentistry, Federal University of Santa Catarina, School of Dentistry, Brazil
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Cardoso AC, Asckar EM, Vieira LF, Bonachela WC, do Valle AL. [Stress transmission to supporting structures in distal extension removable partial dentures (R.P.D.)]. Rev Odontol Univ Sao Paulo 1988; 2:161-6. [PMID: 3078857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Cardoso AC. [Oral rehabilitation of perimolysis. Treatment with bonded prosthesis]. RGO 1987; 35:380-2. [PMID: 3331821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Bulbol WS, Carneiro M, Cardoso AC, Alecrim WD, de Albuquerque BC, Alecrim M das G, Dourado HV. [Acute kidney failure in Plasmodium falciparum malaria]. Rev Inst Med Trop Sao Paulo 1982; 24:58-61. [PMID: 6764291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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Gonçalves ES, Cardoso AC. [Posterior vertical lumbotomy applied to renal biopsy]. AMB Rev Assoc Med Bras 1979; 25:297-8. [PMID: 317365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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