Authors: la Colla, Anabela Belén; Pronsato, Lucía; Ronda, Ana Carolina; Milanesi, Lorena Magdalena; Vasconsuelo, Andrea Anahi; Boland, Ricardo Leopoldo
Publication Date: 2014.
Language: English.
Abstract:
En trabajos previos demostramos que la testosterona (T) y el 17β-estradiol (E2) protegen a las células musculares C2C12 de la apoptosis inducida por peróxido de hidrógeno (H2O2). Conjuntamente evidenciamos la existencia de receptores de estrógenos y andrógenos en las mitocondrias. El presente trabajo se ha centrado en caracterizar los efectos de ambos esteroides en esta organela, que conducen a la supervivencia celular. Específicamente, se evaluaron las acciones de T y E2 sobre el potencial de membrana mitocondrial con el colorante JC-1 y sobre el poro de permeabilidad transitoria mitocondrial (MPTP) mediante el método de calcein-acetoxymethylester/cobalt, utilizando microscopía de fluorescencia y citometría de flujo. Demostramos que T y E2 previenen la apertura del MPTP y la pérdida de potencial de membrana mitocondrial inducidas por H2O2. Además, observamos que el H2O2 aumenta los niveles de expresión proteica del canal aniónico dependiente de voltaje (VDAC) e induce la translocación de Bax a mitocondria. Sin embargo, en presencia de las hormonas la translocación de Bax fue inhibida lo cual sugiere que los miembros de la familia Bcl -2 pueden ser regulados por E2 y T. Los eventos moleculares desencadenados por E2 y T a nivel mitocondrial se reflejaron en la morfología de las organelas. El análisis microscópico de las células C2C12 y cultivos primarios de músculo esquelético de ratón, mediante tinciones con verde de Jano y Mitotracker reveló un efecto protector de los esteroides contra el daño por estrés oxidativo inhibiendo la redistribución y picnosis mitocondrial.
We have previously shown that testosterone (T) and 17β-estradiol (E2) protect C2C12 muscle cells against apoptosis induced by hydrogen peroxide (H2O2). Since we also showed the presence of estrogen and androgen Receptors in mitochondria, this work was focused on the effects of both steroids on this organelle, which result in cellular survival. Specifically, we evaluated the actions of T and E2 on the mitochondrial membrane potential with JC-1 dye and on the mitochondrial permeability transition pore (MPTP) by the calceinacetoxymethylester (AM)/cobalt method, using fluorescence microscopy and flow cytometry. We demonstrated that T and E2 prevent MPTP opening and the loss of mitochondrial membrane potential induced by H2O2. In addition, it was observed that H2O2 increase voltage-dependent anion channel (VDAC) protein expression levels and induce translocation of Bax to mitochondria. However, in the presence of the steroids Bax translocation was abrogated suggesting that members of the Bcl-2 family may be regulated by E2 and T. The observed effects triggered by E2 and T were reflected on mitochondrial morphology. Microscopic analysis of C2C12 cells and primary cultures of mouse skeletal muscle, with Janus Green and Mitotracker staining revealed a protective effect of the steroids against oxidative stress damage which included mitochondrial redistribution and pyknosis of the organelle.
Author affiliation: la Colla, Anabela Belén. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
Author affiliation: Pronsato, Lucía. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnológico Bahia Blanca. Instituto de Ciencias Biologicas y Biomedicas del Sur; Argentina
Author affiliation: Ronda, Ana Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Instituto Argentino de Oceanografía (i); Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
Author affiliation: Milanesi, Lorena Magdalena. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnológico Bahia Blanca. Instituto de Ciencias Biologicas y Biomedicas del Sur; Argentina
Author affiliation: Vasconsuelo, Andrea Anahi. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnológico Bahia Blanca. Instituto de Ciencias Biologicas y Biomedicas del Sur; Argentina
Author affiliation: Boland, Ricardo Leopoldo. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnológico Bahia Blanca. Instituto de Ciencias Biologicas y Biomedicas del Sur; Argentina
Repository: CONICET Digital (CONICET). Consejo Nacional de Investigaciones Científicas y Técnicas
Authors: Boland, Ricardo Leopoldo; Vasconsuelo, Andrea Anahi; Milanesi, Lorena Magdalena; Ronda, Ana Carolina; Russo, Ana Josefa
Publication Date: 2008.
Language: English.
Abstract:
17β-Estradiol exerts an antiapoptotic action in skeletal muscle cells through extranuclear ERα and β. This protective action, mainly involves a non-genomic mechanism of ERK1/2 and PI3K/Akt activation and BAD phosphorylation. ERβ plays a major role in the inhibition of apoptosis by 17β-estradiol at the level of mitochondria, whereas ERα and ERβ mediate the activation of Akt to the same extent, suggesting differential involvement of ER isoforms depending on the step of the apoptotic/survival pathway involved. The myopathies associated to estrogen deficit states may be related to the mechanisms by which estrogen regulates apoptosis.
Author affiliation: Boland, Ricardo Leopoldo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
Author affiliation: Vasconsuelo, Andrea Anahi. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
Author affiliation: Milanesi, Lorena Magdalena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
Author affiliation: Ronda, Ana Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
Author affiliation: Russo, Ana Josefa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
Repository: CONICET Digital (CONICET). Consejo Nacional de Investigaciones Científicas y Técnicas
Publication Date: 2015.
Language: English.
Abstract:
We recently reported that the vitamin D receptor (VDR) and p38 MAPK participate in pro-differentiation events triggered by 1α,25(OH)2-vitamin D3 [1,25D] in skeletal muscle cells. Specifically, our studies demonstrated that 1,25D promotes G0/G1 arrest of cells inducing cyclin D3 and cyclin dependent kinases inhibitors (CKIs) p21Waf1/Cip1 and p27Kip1 expression in a VDR and p38 MAPK dependent manner. In this work we present data indicating that cyclin-dependent kinases (CDKs) 4 and 6 also play a role in the mechanism by which 1,25D stimulates myogenesis. To investigate VDR involvement in hormone regulation of CDKs 4 and 6, we significantly reduced its expression by the use of a shRNA against mouse VDR, generating the skeletal muscle cell line C2C12-VDR. Investigation of changes in cellular cycle regulating proteins by immunoblotting showed that the VDR is involved in the 1,25D -induced CDKs 4 and 6 protein levels at 6 h of hormone treatment. CDK4 levels remains high during S phase peak and G0/G1 arrest while CDK6 expression decreases at 12 h and increases again al 24 h. The up-regulation of CDKs 4 and 6 by 1,25D (6 h) was abolished in C2C12 cells pre-treated with the ERK1/2 inhibitor, UO126. Moreover, CDKs 4 and 6 expression induced by the hormone nor was detected when α and β isoforms of p38 MAPK were inhibited by compound SB203580. Confocal images show that there is not co-localization between VDR and CDKs at 6 h of hormone treatment, however CDK4 and VDR co-localizates in nucleus after 12 h of 1,25D exposure. Of relevance, at this time 1,25D promotes CDK6 localization in a peri-nuclear ring. Our data demonstrate that the VDR, ERK1/2 and p38 MAPK are involved in the control of CDKs 4 and 6 by 1,25D in skeletal muscle cells sustaining the operation of a VDR and MAPKs -dependent mechanism in hormone modulation of myogenesis.
Author affiliation: Irazoqui, Ana Paula. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnológico Bahia Blanca. Instituto de Ciencias Biologicas y Biomedicas del Sur; Argentina
Author affiliation: Heim, Nadia B.. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnológico Bahia Blanca. Instituto de Ciencias Biologicas y Biomedicas del Sur; Argentina
Author affiliation: Boland, Ricardo Leopoldo. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnológico Bahia Blanca. Instituto de Ciencias Biologicas y Biomedicas del Sur; Argentina
Author affiliation: Buitrago, Claudia Graciela. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnológico Bahia Blanca. Instituto de Ciencias Biologicas y Biomedicas del Sur; Argentina
Repository: CONICET Digital (CONICET). Consejo Nacional de Investigaciones Científicas y Técnicas
Authors: Buitrago, Claudia Graciela; Milanesi, Lorena Magdalena; Ronda, Ana Carolina; Vasconsuelo, Andrea Anahi; Boland, Ricardo Leopoldo
Publication Date: 2009.
Language: English.
Abstract:
1α,25(OH)2-vitamin D3 and 17β-estradiol regulate skeletal muscle cell proliferation, differentiation, apoptosis and contractility through receptor-mediated transcriptional and non-genomic mechanisms. This review focuses on recent advances on signal transduction pathways activated by both steroid hormones. Data are given on the participation of the VDR and ERs (α and β) in activation of MAPKs in muscle cells. Likewise, we describe novel evidence supporting non-classical localizations of the VDR in the plasma membrane and ER β in mitochondria. 1α,25(OH)2D3 promotes DNA synthesis in skeletal muscle cells implicating c-Src/ERK1/2, whereas 17β-estradiol inhibits apoptosis through ERK2 and p38 MAPKs. This study provides basis for the understanding of vitamin D- and estrogen-dependent myopathies.
Author affiliation: Buitrago, Claudia Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Ciencias Biológicas y Biomédicas del Sur. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia. Instituto de Ciencias Biológicas y Biomédicas del Sur; Argentina
Author affiliation: Milanesi, Lorena Magdalena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Ciencias Biológicas y Biomédicas del Sur. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia. Instituto de Ciencias Biológicas y Biomédicas del Sur; Argentina
Author affiliation: Ronda, Ana Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina
Author affiliation: Vasconsuelo, Andrea Anahi. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Ciencias Biológicas y Biomédicas del Sur. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia. Instituto de Ciencias Biológicas y Biomédicas del Sur; Argentina
Author affiliation: Boland, Ricardo Leopoldo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Ciencias Biológicas y Biomédicas del Sur. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia. Instituto de Ciencias Biológicas y Biomédicas del Sur; Argentina
Repository: CONICET Digital (CONICET). Consejo Nacional de Investigaciones Científicas y Técnicas
Publication Date: 2017.
Language: English.
Abstract:
The reliability of reverse transcription-quantitative PCR (RT-qPCR) results in gene expression studies depends on the approaches used to account for non-biological variations. In order to find a proper normalization strategy for the study of genes related to growth hormone signaling in skeletal muscle of growing mice, nine unrelated genes were evaluated as internal controls. According to the most used algorithms–geNorm, the Comparative ΔCq method, NormFinder and BestKeeper–GSK3B, YWHAZ, RPL13A and RN18S were found as the most stable. However, the relative expression levels of eight of the potential reference genes assessed decreased with age in cDNA samples obtained from the same amount of total RNA. In a different approach to analyze this apparent discrepancy, experiments were performed with cDNA obtained from equal amounts of purified mRNA. Since the decline was still observed, the hypothesis of an age-related change in mRNA to total RNA ratio that could account for the systematic decrease was rejected. Differences among experimental groups could be due to a substantial increase with age in highly expressed mRNAs, which would bias the quantitation of the remaining genes. Consequently, those reference genes reflecting this dilution effect, which would have been discarded considering their variable relative expression levels, arose as suitable internal controls.
Author affiliation: Piazza, Verónica Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Química y Físico-Química Biológicas "Prof. Alejandro C. Paladini". Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Química y Físico-Química Biológicas; Argentina
Author affiliation: Bartke, Andrzej. Southern Illinois University; Estados Unidos
Author affiliation: Miquet, Johanna Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Química y Físico-Química Biológicas "Prof. Alejandro C. Paladini". Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Química y Físico-Química Biológicas; Argentina
Author affiliation: Sotelo, Ana Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Química y Físico-Química Biológicas "Prof. Alejandro C. Paladini". Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Química y Físico-Química Biológicas; Argentina
Repository: CONICET Digital (CONICET). Consejo Nacional de Investigaciones Científicas y Técnicas
Authors: Pereyra, Andrea Soledad; Wang, Zhong-Min; Messi, Maria Laura; Zhang, Tan; Wu, Hanzhi; Register, Thomas C.; Forbes, Elizabeth; Devarie Baez, Nelmi O.; Files, Daniel Clark; Abba, Martín Carlos; Furdui, Cristina; Delbono, Osvaldo
Publication Date: 2017.
Language: English.
Abstract:
Loss of muscle mass and force with age leads to fall risk, mobility impairment, and reduced quality of life. This article shows that BDA-410, a calpain inhibitor, induced loss of body weight and fat but not lean mass or skeletal muscle proteins in a cohort of sedentary 23-month-old mice. Food and water intake and locomotor activity were not modified, whereas BDA-410 treatment decreased intramyocellular lipid and perigonadal fat, increased serum nonesterified fatty acids, and upregulated the genes mediating lipolysis and oxidation, lean phenotype, muscle contraction, muscle transcription regulation, and oxidative stress response. This finding is consistent with our recent report that lipid accumulation in skeletal myofibers is significantly correlated with slower fiber-contraction kinetics and diminished power in obese older adult mice. A proteomic analysis and immunoblot showed downregulation of the phosphatase PPP1R12B, which increases phosphorylated myosin half-life and modulates the calcium sensitivity of the contractile apparatus. This study demonstrates that BDA-410 exerts a beneficial effect on skeletal muscle contractility through new, alternative mechanisms, including enhanced lipolysis, upregulation of "lean phenotype-related genes," downregulation of the PP1R12B phosphatase, and enhanced excitation- contraction coupling. This single compound holds promise for treating age-dependent decline in muscle composition and strength.
Author affiliation: Pereyra, Andrea Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Bioquímicas de La Plata "Prof. Dr. Rodolfo R. Brenner". Universidad Nacional de la Plata. Facultad de Ciencias Médicas. Instituto de Investigaciones Bioquímicas de La Plata ; Argentina. Wake Forest School of Medicine; Estados Unidos
Author affiliation: Wang, Zhong-Min. Wake Forest School of Medicine; Estados Unidos
Author affiliation: Messi, Maria Laura. Wake Forest School of Medicine; Estados Unidos
Author affiliation: Zhang, Tan. Wake Forest School of Medicine; Estados Unidos
Author affiliation: Wu, Hanzhi. Wake Forest School of Medicine; Estados Unidos
Author affiliation: Register, Thomas C.. Wake Forest School of Medicine; Estados Unidos
Author affiliation: Forbes, Elizabeth. Wake Forest School of Medicine; Estados Unidos
Author affiliation: Devarie Baez, Nelmi O.. Wake Forest School of Medicine; Estados Unidos
Author affiliation: Files, Daniel Clark. Wake Forest School of Medicine; Estados Unidos
Author affiliation: Abba, Martín Carlos. Universidad Nacional de la Plata. Facultad de Ciencias Médicas; Argentina
Author affiliation: Furdui, Cristina. Wake Forest School of Medicine; Estados Unidos
Author affiliation: Delbono, Osvaldo. Wake Forest School of Medicine; Estados Unidos
Repository: CONICET Digital (CONICET). Consejo Nacional de Investigaciones Científicas y Técnicas
Authors: Zhang, Tan; Pereyra, Andrea Soledad; Wang, Zhong Min; Birbrair, Alexander; Reisz, Julie A.; Files, Daniel Clark; Purcell, Lina; Feng, Xin; Messi, Maria L.; Feng, Hanzhong; Chalovich, Joseph; Jin, Jian Ping; Furdui, Cristina; Delbono, Osvaldo
Publication Date: 2016.
Language: English.
Abstract:
Loss of strength in human and animal models of aging can be partially attributed to a well-recognized decrease in muscle mass; however, starting at middle-age, the normalized force (force/muscle cross-sectional area) in the knee extensors and single muscle fibers declines in a curvilinear manner. Strength is lost faster than muscle mass and is a more consistent risk factor for disability and death. Reduced expression of the voltage sensor Ca2+ channel α1 subunit (Cav1.1) with aging leads to excitation-contraction uncoupling, which accounts for a significant fraction of the decrease in skeletal muscle function. We recently reported that in addition to its classical cytoplasmic location, fast skeletal muscle troponin T3 (TnT3) is fragmented in aging mice, and both full-length TnT3 (FL-TnT3) and its carboxyl-terminal (CT-TnT3) fragment shuttle to the nucleus. Here, we demonstrate that it regulates transcription of Cacna1s, the gene encoding Cav1.1. Knocking down TnT3 in vivo downregulated Cav1.1. TnT3 downregulation or overexpression decreased or increased, respectively, Cacna1s promoter activity, and the effect was ablated by truncating the TnT3 nuclear localization sequence. Further, we mapped the Cacna1s promoter region and established the consensus sequence for TnT3 binding to Cacna1s promoter. Systemic administration of BDA-410, a specific calpain inhibitor, prevented TnT3 fragmentation, and Cacna1s and Cav1.1 downregulation and improved muscle force generation in sedentary old mice.
Author affiliation: Zhang, Tan. Wake Forest School of Medicine; Estados Unidos
Author affiliation: Pereyra, Andrea Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Bioquímicas de La Plata "Prof. Dr. Rodolfo R. Brenner". Universidad Nacional de la Plata. Facultad de Ciencias Médicas. Instituto de Investigaciones Bioquímicas de La Plata ; Argentina
Author affiliation: Wang, Zhong Min. Wake Forest School of Medicine; Estados Unidos
Author affiliation: Birbrair, Alexander. Wake Forest School of Medicine; Estados Unidos
Author affiliation: Reisz, Julie A.. Wake Forest School of Medicine; Estados Unidos
Author affiliation: Files, Daniel Clark. Wake Forest School of Medicine; Estados Unidos
Author affiliation: Purcell, Lina. Wake Forest School of Medicine; Estados Unidos
Author affiliation: Feng, Xin. Wake Forest School of Medicine; Estados Unidos
Author affiliation: Messi, Maria L.. Wake Forest School of Medicine; Estados Unidos
Author affiliation: Feng, Hanzhong. Wayne State University School of Medicine; Estados Unidos
Author affiliation: Chalovich, Joseph. East Carolina University; Estados Unidos
Author affiliation: Jin, Jian Ping. Wayne State University School of Medicine; Estados Unidos
Author affiliation: Furdui, Cristina. Wake Forest School of Medicine; Estados Unidos
Author affiliation: Delbono, Osvaldo. Wake Forest School of Medicine; Estados Unidos
Repository: CONICET Digital (CONICET). Consejo Nacional de Investigaciones Científicas y Técnicas
Authors: Palstra, Arjan P.; Beltran, Sergi; Burgerhout, Erik; Brittijn, Sebastiaan A.; Magnoni, Leonardo Julián; Henkel, Christiaan V.; Jansen, Hans J.; Van Den Thillart, Guido E. E. J. M.; Spaink, Herman P.; Planas, Josep V.
Publication Date: 2013.
Language: English.
Abstract:
Deep RNA sequencing (RNA-seq) was performed to provide an in-depth view of the transcriptome of red and white skeletal muscle of exercised and non-exercised rainbow trout (Oncorhynchus mykiss) with the specific objective to identify expressed genes and quantify the transcriptomic effects of swimming-induced exercise. Pubertal autumn-spawning seawater-raised female rainbow trout were rested (n = 10) or swum (n = 10) for 1176 km at 0.75 body-lengths per second in a 6,000-L swimflume under reproductive conditions for 40 days. Red and white muscle RNA of exercised and non-exercised fish (4 lanes) was sequenced and resulted in 15–17 million reads per lane that, after de novo assembly, yielded 149,159 red and 118,572 white muscle contigs. Most contigs were annotated using an iterative homology search strategy against salmonid ESTs, the zebrafish Danio rerio genome and general Metazoan genes. When selecting for large contigs (.500 nucleotides), a number of novel rainbow trout gene sequences were identified in this study: 1,085 and 1,228 novel gene sequences for red and white muscle, respectively, which included a number of important molecules for skeletal muscle function. Transcriptomic analysis revealed that sustained swimming increased transcriptional activity in skeletal muscle and specifically an upregulation of genes involved in muscle growth and developmental processes in white muscle. The unique collection of transcripts will contribute to our understanding of red and white muscle physiology, specifically during the long-term reproductive migration of salmonids.
Author affiliation: Palstra, Arjan P.. Universidad de Barcelona. Facultad de Biología; España;
Author affiliation: Beltran, Sergi. Universitat de Barcelona. Centres Cientifics i Tecnològics. Unitat de Bioinformàtica; España;
Author affiliation: Burgerhout, Erik. Leiden University. Institute of Biology. Molecular Cell Biology; Países Bajos; ZF-screens; Países Bajos;
Author affiliation: Brittijn, Sebastiaan A.. Leiden University. Institute of Biology. Molecular Cell Biology; Países Bajos; ZF-screens; Países Bajos;
Author affiliation: Magnoni, Leonardo Julián. Universidad de Barcelona. Facultad de Biología; España; Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Investigaciones Biotecnológicas - Instituto Tecnológico Chascomús. Instituto de Investigaciones Biotecnológicas (sede Chascomús); Argentina;
Author affiliation: Henkel, Christiaan V.. ZF-screens; Países Bajos;
Author affiliation: Jansen, Hans J.. ZF-screens; Países Bajos;
Author affiliation: Van Den Thillart, Guido E. E. J. M.. Leiden University. Institute of Biology. Molecular Cell Biology; Países Bajos; ZF-screens; Países Bajos;
Author affiliation: Spaink, Herman P.. Leiden University. Institute of Biology. Molecular Cell Biology; Países Bajos; ZF-screens; Países Bajos;
Author affiliation: Planas, Josep V.. Universidad de Barcelona. Facultad de Biologia; España;
Repository: CONICET Digital (CONICET). Consejo Nacional de Investigaciones Científicas y Técnicas
Publication Date: 2013.
Language: English.
Abstract:
This work reports the effect of dietary Salba (chia) seed rich in n-3 -linolenic acid on the morphological and metabolic aspects involved in adipose tissue dysfunction and the mechanism/s underlying the impaired glucose and lipid metabolism in the skeletal muscle of rats fed a sucrose-rich diet (SRD). Rats were fed a SRD for 3 months. Thereafter, half the rats continued with SRD while in the other half, corn oil (CO) was replaced by chia seed for 3 months (SRD+chia). In control group, corn starch replaced sucrose. The replacement of CO by chia seed in the SRD reduced adipocyte hypertrophy, cell volume and size distribution, improved lipogenic enzyme activities, lipolysis and the antilipolytic action of insulin. In the skeletal muscle lipid storage, glucose phosphorylation and oxidation were normalized. Chia seed reversed the impaired insulin stimulated glycogen synthase activity, glycogen, glucose-6-phosphate and GLUT-4 protein levels as well as insulin resistance and dyslipidemia.
Author affiliation: Oliva, Maria Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Universidad Nacional de San Luis. Facultad de Quimica, Bioquimica y Farmacia. Departamento de Bioquímica y Ciencias Biológicas; Argentina
Author affiliation: Ferreira, M. R.. Universidad Nacional de San Luis. Facultad de Quimica, Bioquimica y Farmacia. Departamento de Bioquímica y Ciencias Biológicas; Argentina
Author affiliation: Chicco, Adriana Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Universidad Nacional de San Luis. Facultad de Quimica, Bioquimica y Farmacia. Departamento de Bioquímica y Ciencias Biológicas; Argentina
Author affiliation: Lombardo, Y. B.. Universidad Nacional de San Luis. Facultad de Quimica, Bioquimica y Farmacia. Departamento de Bioquímica y Ciencias Biológicas; Argentina
Repository: CONICET Digital (CONICET). Consejo Nacional de Investigaciones Científicas y Técnicas
Authors: Magnoni, Leonardo Julián; Crespo, Diego; Ibarz, Antoni; Blasco, Josefina; Fernández Borrás, Jaume; Planas, Josep V.
Publication Date: 2013.
Language: English.
Abstract:
Training at sustainable swimming speeds can produce changes in fish skeletal muscle that are important for aquaculture due to their growth-potentiating effects. Such changes may be even more relevant when fish are fed diets containing an increasing proportion of carbohydrates as an energy source. We evaluated the effects of moderate-intensity sustained swimming on the transcriptomic response of red and white muscle in rainbow trout fed a carbohydrate-rich diet using microarray and qPCR. Analysis of the red and white muscle transcriptome in resting or swimming (1.3 body lengths/s) for 30 days revealed significant changes in the expression of a large number of genes (395 and 597, respectively), with a total of 218 differentially expressed genes (DEGs) common for both muscles. A large number of the genes involved in glucose use and energy generation, contraction, development, synthesis and catabolism of proteins were up-regulated in red and white muscle. Additionally, DEGs in both muscles were involved in processes of defense response and apoptosis. Skeletal muscle contraction activates a transcriptional program required for the successful adaptation of both muscles to the changing demands imposed by swimming conditions. Future studies should further clarify the mechanisms involved in the adaptation of both tissues to exercise and assess possible benefits of such conditions for cultured fish.
Author affiliation: Magnoni, Leonardo Julián. Universidad de Barcelona. Facultad de Biología; España. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Author affiliation: Crespo, Diego. Universidad de Barcelona. Facultad de Biología; España
Author affiliation: Ibarz, Antoni. Universidad de Barcelona. Facultad de Biología; España
Author affiliation: Blasco, Josefina. Universidad de Barcelona. Facultad de Biología; España
Author affiliation: Fernández Borrás, Jaume. Universidad de Barcelona. Facultad de Biología; España
Author affiliation: Planas, Josep V.. Universidad de Barcelona. Facultad de Biología; España
Repository: CONICET Digital (CONICET). Consejo Nacional de Investigaciones Científicas y Técnicas