Now showing items 1-20 of 27

    • Activation of Chymotrypsin-Like Activity of the Proteasome during Ischemia Induces Myocardial Dysfunction and Death 

      Sánchez Vergara, Gina; Berrios, Daniela; Olmedo, Ivonne; Pezoa, Javier; Riquelme, Jaime A.; Montecinos, Luis; Pedrozo Cibils, Zully; Donoso Laurent, Paulina (Public Library Science, 2016)
      Inhibitors of the ubiquitin-proteasome system improve hemodynamic parameters and decrease the infarct size after ischemia reperfusion. The molecular basis of this protection is not fully understood since most available ...
    • Calpains and proteasomes mediate degradation of ryanodine receptors in a model of cardiac ischemic reperfusion 

      Pedrozo Cibils, Zully; Sánchez, G.; Torrealba, N.; Valenzuela, Rodrigo; Fernández, Carolina; Hidalgo Tapia, María Cecilia; Lavandero González, Sergio; Donoso Laurent, Paulina (ELSEVIER SCIENCE BV, 2010-03)
      Type-2 ryanodine receptors (RyR2) - the calcium release channels of cardiac sarcoplasmic reticulum - have a central role in cardiac excitation-contraction coupling. In the heart, ischemia/reperfusion causes a rapid and ...
    • Cardiomyocyte death: Mechanisms and translational implications 

      Chiong Lay, Mario; Wang, Z. V.; Pedrozo Cibils, Zully; Cao, D. J.; Troncoso, R.; Ibacache, M.; Criollo, A.; Nemchenko, A.; Hill, J. A.; Lavandero González, Sergio (2011)
      Cardiovascular disease (CVD) is the leading cause of morbidity and mortality worldwide. Although treatments have improved, development of novel therapies for patients with CVD remains a major research goal. Apoptosis, ...
    • Cardiomyocyte ryanodine receptor degradation by chaperone-mediated autophagy 

      Pedrozo Cibils, Zully; Torrealba, Natalia; Fernández, Carolina; Gatica, Damián; Toro, Barbra; Quiroga, Clara; Rodríguez, Andrea E.; Sánchez, Gina; Gillette, Thomas G.; Hill, Joseph A.; Donoso Laurent, Paulina; Lavandero González, Sergio (the European Society of Cardiology, 2013)
      Aims Chaperone-mediated autophagy (CMA) is a selective mechanism for the degradation of soluble cytosolic proteins bearing the sequence KFERQ. These proteins are targeted by chaperones and delivered to lysosomes where ...
    • Dexmedetomidine preconditioning activates pro-survival kinases and attenuates regional ischemia/reperfusion injury in rat heart 

      Ibacache Figueroa, Mauricio; Sánchez, Gina; Gálvez, Felipe; Pedrozo Cibils, Zully; Humeres Martínez, Claudio; Echevarría, Ghislaine; Duaso, Juan; Hassi, Mario; García Nannig, Lorena; Díaz Araya, Guillermo; Lavandero González, Sergio (ELSEVIER, 2012-04)
      Pharmacological preconditioning limits myocardial infarct size after ischemia/reperfusion. Dexmedetomidine is an alpha(2)-adrenergic receptor agonist used in anesthesia that may have cardioprotective properties against ...
    • Dexmedetomidine protects the heart against ischemia-reperfusion injury by an endothelial eNOS/NO dependent mechanism 

      Riquelme, Jaime; Westermeier, Francisco; Hall, Andrew R.; Vicencio, Jose; Pedrozo Cibils, Zully; Ibacache, Mauricio; Fuenzalida, Barbara; Sobrevia, Luis; Davidson, Sean M.; Yellon, Derek M.; Sanchez, Gina; Lavandero González, Sergio (Elsevier, 2016)
      The alpha2-adrenergic receptor agonist Dexmedetomidine (Dex) is a sedative medication used by anesthesiologists. Dex protects the heart against ischemia-reperfusion (IR) and can also act as a preconditioning mimetic. The ...
    • Down syndrome critical region 1 gene, Rcan1, helps maintain a more fused Mitochondrial Network 

      Parra Ortíz, María Valentina; Altamirano, Francisco; Hernández Fuentes, Carolina; Tong, Dan; Kyrychenko, Victoriia; Rotter, David; Pedrozo Cibils, Zully; Hill, Joseph A.; Eisner, Verónica; Lavandero González, Sergio; Schneider, Jay W.; Rothermel, Beverly A. (Lippincott Williams & Wilkins, 2018)
      Rationale: The regulator of calcineurin 1 (RCAN1) inhibits CN (calcineurin), a Ca2+-activated protein phosphatase important in cardiac remodeling. In humans, RCAN1 is located on chromosome 21 in proximity to the Down ...
    • Drp1 loss-of-function reduces cardiomyocyte oxygen dependence protecting the heart from ischemia-reperfusion injury 

      Zepeda Iriarte, Ramiro; Kuzmicic, Jovan; Parra Ortiz, Valentina; Troncoso Cotal, Rodrigo; Pennanen, Christian; Riquelme, Jaime A.; Pedrozo Cibils, Zully; Chiong Lay, Mario; Sánchez Vergara, Gina; Lavandero González, Sergio (Lippincott Williams and Wilkins, 2014)
      Mitochondria are key organelles for ATP production in cardiomyocytes, which is regulated by processes of fission and fusion. We hypothesized that the mitochondria fusion protein dynamin-related protein 1 (Drp1) inhibition, ...
    • Endoplasmic reticulum: ER stress regulates mitochondrial bioenergetics 

      Bravo Sagua, Roberto; Gutiérrez, Tomás; Paredes, Felipe; Gatica, Damián; Rodríguez, Andrea E.; Pedrozo Cibils, Zully; Chiong Lay, Mario; Parra, Valentina; Quest, Andrew F. G.; Rothermel, Beverly A.; Lavandero González, Sergio (Elsevier, 2012)
      Endoplasmic reticulum (ER) stress activates an adaptive unfolded protein response (UPR) that facilitates cellular repair, however, under prolonged ER stress, the UPR can ultimately trigger apoptosis thereby terminating damaged ...
    • Exercise and tachycardia increase NADPH oxidase and ryanodine receptor-2 activity: Possible role in cardioprotection 

      Sánchez, Gina; Escobar, Matías; Pedrozo Cibils, Zully; Macho Fisher, Pilar; Domenech Lira, Raúl; Härtel, Steffen; Hidalgo Tapia, María Cecilia; Donoso, Paulina (2008)
      Aim: Our objective was to investigate in cardiac muscle the contribution of NADPH oxidase to (a) ryanodine receptor-2 (RyR2) S-glutathionylation and (b) the preconditioning effects of exercise and tachycardia on infarct ...
    • FK866 compromises mitochondrial metabolism and adaptive stress responses in cultured cardiomyocytes 

      Oyarzún, Alejandra P.; Westermeier, Francisco; Pennanen, Christian; López Crisosto, Camila; Parra, Valentina; Sotomayor Flores, Cristian; Sánchez Vergara, Gina; Pedrozo Cibils, Zully; Troncoso Cotal, Rodrigo; Lavandero González, Sergio (Elsevier, 2015)
      Aim: FK866 is an inhibitor of the NAD(+) synthesis rate-limiting enzyme nicotinamide phosphoribosyltransferase (NAMPT). Using FK866 to target NAD(+) synthesis has been proposed as a treatment for inflammatory diseases and ...
    • Glucose deprivation causes oxidative stress and stimulates aggresome formation and autophagy in cultured cardiac myocytes 

      Marambio, Paola; Toro, Barbra; Sanhueza, Carlos; Troncoso, Rodrigo; Parra, Valentina; Verdejo, Hugo; García Nannig, Lorena; Quiroga, Clara; Munafo, Daniela; Díaz Elizondo, Jessica; Bravo Sagua, Roberto; González Burgos, María Julieta; Díaz Araya, Guillermo; Pedrozo Cibils, Zully; Chiong Lay, Mario; Co (2010)
      Aggresomes are dynamic structures formed when the ubiquitin-proteasome system is overwhelmed with aggregation-prone proteins. In this process, small protein aggregates are actively transported towards the microtubule-organizing ...
    • Herp depletion protects from protein aggregation by up-regulating autophagy 

      Quiroga, Clara; Gatica, Damián; Paredes, Felipe; Bravo, Roberto; Troncoso, Rodrigo; Pedrozo Cibils, Zully; Rodríguez, Andrea E.; Toro, Barbra; Chiong Lay, Mario; Vicencio Bustamante, José Manuel; Hetz Flores, Claudio; Lavandero González, Sergio (Elsevier, 2013)
      Herp is an endoplasmic reticulum (ER) stress inducible protein that participates in the ER-associated protein degradation (ERAD) pathway. However, the contribution of Herp to other protein degradation pathways like autophagy ...
    • Herpud1 negatively regulates pathological cardiac hypertrophy by inducing IP3 receptor degradation 

      Torrealba, Natalia; Navarro Márquez, Mario F.; Vega Garrido, Valeria; Pedrozo Cibils, Zully; Romero, Diego; Eura, Yuka; Villalobos, Elisa; Carlos Roa, Juan; Chiong Lay, Mario; Kokame, Koichi; Lavandero González, Sergio (Nature Publishing Group, 2017)
      Cardiac hypertrophy is an adaptive response triggered by pathological stimuli. Regulation of the synthesis and the degradation of the Ca2+ channel inositol 1,4,5-trisphosphate receptor (IP3R) affects progression to cardiac ...
    • High fat diet induced obesity produces spontaneous ventricular arrhythmias and increases the activity of ryanodine receptors in mice 

      Sánchez Vergara, Gina; Araneda, Felipe; Peña, Juan Pedro; Finkelstein, José Pablo; Riquelme, Jaime A.; Montecinos, Luis; Barrientos Briones, Genaro; Llanos Vidal, Paola; Pedrozo Cibils, Zully; Said, Matilde; Bull Simpfendorfer, Ricardo; Donoso Laurent, Paulina (MDPI, 2018)
      Ventricular arrhythmias are a common cause of sudden cardiac death, and their occurrence is higher in obese subjects. Abnormal gating of ryanodine receptors (RyR2), the calcium release channels of the sarcoplasmic reticulum, ...
    • High-fat-diet-induced obesity produces spontaneous ventricular arrhythmias and increases the activity of ryanodine receptors in mice 

      Sánchez, Gina; Loyola Araneda, Felipe; Peña, Juan Pedro; Finkelstein Muñoz, José Pablo; Riquelme, Jaime A.; Montecinos, Luis; Barrientos, Genaro; Llanos Vidal, Paola; Pedrozo Cibils, Zully; Said, Matilde; Bull, Ricardo; Donoso, Paulina (MDPI AG, 2018)
      © 2018 by the authors. Licensee MDPI, Basel, Switzerland. Ventricular arrhythmias are a common cause of sudden cardiac death, and their occurrence is higher in obese subjects. Abnormal gating of ryanodine receptors (RyR2), ...
    • Histone deacetylase inhibition blunts ischemia/reperfusion Injury by inducing cardiomyocyte autophagy 

      Xie, Min; Kong, Yongli; Tan, Wei; May, Herman; Battiprolu, Pavan K.; Pedrozo Cibils, Zully; Wang, Zhao V.; Morales, Cyndi; Luo, Xiang; Cho, Geoffrey; Jiang, Nan; Jessen, Michael E.; Warner, John J.; Lavandero González, Sergio; Gillette, Thomas G.; Turer, Aslan T.; Hill, Joseph A. (American Hearth Association, 2014)
      Background—Reperfusion accounts for a substantial fraction of the myocardial injury occurring with ischemic heart disease. Yet, no standard therapies are available targeting reperfusion injury. Here, we tested the hypothesis ...
    • Inhibition of class I histone deacetylases blunts cardiac hypertrophy through TSC2-dependent mTOR repression 

      Morales, Cyndi R.; Li, Dan L.; Pedrozo Cibils, Zully; May, Herman I.; Jiang, Nan; Kyrychenko, Viktoriia; Cho, Geoffrey; Kim, Soo Young; Wang, Zhao V.; Rotter, David; Rothermel, Beverly A.; Schneider, Jay W.; Lavandero González, Sergio; Gillette, Thomas G.; Hill, Joseph A. (Amer Assoc Advancement Science, 2016)
      Altering chromatin structure through histone posttranslational modifications has emerged as a key driver of transcriptional responses in cells. Modulation of these transcriptional responses by pharmacological inhibition ...
    • Iron induces protection and necrosis in cultured cardiomyocytes: Role of reactive oxygen species and nitric oxide 

      Muñoz, Juan Pablo; Chiong Lay, Mario; García Nannig, Lorena; Troncoso Cotal, Rodrigo Andrés; Toro, Barbra; Pedrozo Cibils, Zully; Díaz Elizondo, Jessica; Salas, Daniela; Parra Ortíz, María Valentina; Núñez González, Marco; Hidalgo Tapia, María Cecilia; Lavandero González, Sergio (ELSEVIER SCIENCE INC, 2010-02-15)
      We investigate here the role of reactive oxygen species and nitric oxide in iron-induced cardiomyocyte hypertrophy or cell death Cultured rat cardiomyocytes incubated with 20 mu M iron (added as FeCl3-Na nitrilotriacetate, ...
    • Mechanical stretch increases L-type calcium channel stability in cardiomyocytes through a polycystin-1/AKT-dependent mechanism 

      Córdova, Andrés; Olmedo, Ivonne; Riquelme, J.; Barrientos, G.; Sánchez, G.; Gillette, Thomas G.; Lavandero González, Sergio; Chiong Lay, Mario; Donoso, P.; Pedrozo Cibils, Zully (Elsevier Science BV, 2018)
      The L-type calcium channel (LTCC) is an important determinant of cardiac contractility. Therefore, changes in LTCC activity or protein levels could be expected to affect cardiac function. Several studies describing LTCC ...