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Moreno-Manuel A, Macias A, Cruz FM, Gutierrez L, Martinez Carrascoso I, Bermudez-Jimenez FJ, Vera-Pedrosa ML, Sanchez-Perez P, Bernal J, Jalife J. Atrial-specific reduction of Kir2.1 channel pore diameter in addition to loss of inward-going rectification underlies inducible atrial fibrillation in a mouse model of short QT syndrome type 3. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.2970] [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: 11/13/2022] Open
Abstract
Abstract
Introduction
Short QT Syndrome Type 3 (SQTS3) is an extremely rare arrhythmogenic disease caused by gain-of-function mutations in the KCNJ2 gene coding the inward rectifier potassium channel Kir2.1. We investigated arrhythmogenic mechanisms associated with a de-novo mutation (E299V) in Kir2.1 in an 11-year-old boy presenting an extremely abbreviated QT interval, paroxysmal atrial fibrillation, and mild left ventricular dysfunction. Amino acid E299 in the Kir2.1 sequence is necessary for polyamine binding induced inward rectification.
Purpose
Test the hypothesis that Kir2.1E299V induces reduced conductance and lack of rectification that causes electrical defects in atrial cardiomyocytes, predisposing patients to atrial arrhythmias.
Methods
We used intravenous adeno-associated virus-mediated gene transfer to generate mice expressing wild-type (WT) and the E299V mutant protein. We used ECG, intracardiac stimulation, patch-clamp, molecular biology and computational modelling to characterize the models and study arrhythmia mechanisms in the atria and ventricles.
Results
We confirmed WT or mutant Kir2.1 gene expression specifically in the mouse heart. On ECG, the corrected QT (QTc) interval of Kir2.1E299V mice was significantly shorter than Kir2.1WT mice (p<0.0001). The PR interval in Kir2.1E299V was also significantly shorter than WT mice (p<0.0001). On intracardiac stimulation, the largest proportion of arrhythmic events occurred in the atria, as 7 out of 9 Kir2.1E299V mice presented >1 second atrial flutter/fibrillation, while only 2 out of 10 Kir2.1WT mice showed this type of arrhythmia (p=0.023). On patch clamping, both atrial and ventricular cardiomyocytes expressing Kir2.1E299V had extremely abbreviated action potential durations (APD90) at all frequencies studied (p<0.0001). The current/voltage relation of ventricular Kir2.1E299V cardiomyocytes revealed an absence of inward-going rectification and increased IK1 at voltages positive to −80 mV compared to Kir2.1WT cardiomyocytes (p<0.0001). In contrast, while in the atrial Kir2.1E299V cardiomyocytes the outward IK1 was increased at voltages positive to −80 mV with loss of rectification, IK1 was significantly reduced at voltages negative to −80 mV (p<0.0001), suggesting a loss of function leading to atrial arrhythmia inducibility. A higher proportion of Kir2.2 at atrial level and atomic in-silico 3D simulations suggested that the mutation impaired polyamine block of the Kir2.1E299V-Kir2.2 channel while reducing the pore diameter.
Conclusions
This first in-vivo mouse model of cardiac-specific SQTS3 recapitulates the electrophysiological phenotype of a patient with the Kir2.1E299V mutation. The mutation results in a Kir2.1 gain-of-function mediated by and absence of rectification. The predominant arrhythmias induced in these SQTS3 mice were supraventricular likely due to the combined lack of inward rectification and atrial-specific reduced pore diameter of the Kir2.1E299V-Kir2.2 channel.
Funding Acknowledgement
Type of funding sources: Private company. Main funding source(s): La Caixa FoundationLa Maratό TV3 Foundation
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Affiliation(s)
- A Moreno-Manuel
- Spanish National Centre for Cardiovascular Research , Madrid , Spain
| | - A Macias
- Spanish National Centre for Cardiovascular Research , Madrid , Spain
| | - F M Cruz
- Spanish National Centre for Cardiovascular Research , Madrid , Spain
| | - L Gutierrez
- Spanish National Centre for Cardiovascular Research , Madrid , Spain
| | | | - F J Bermudez-Jimenez
- University Hospital Virgen de las Nieves, Family Heart Disease and Cardiovascular Genetics , Granada , Spain
| | - M L Vera-Pedrosa
- Spanish National Centre for Cardiovascular Research , Madrid , Spain
| | - P Sanchez-Perez
- Spanish National Centre for Cardiovascular Research , Madrid , Spain
| | - J Bernal
- Spanish National Centre for Cardiovascular Research , Madrid , Spain
| | - J Jalife
- Spanish National Centre for Cardiovascular Research , Madrid , Spain
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Gutierrez-Espinosa De Los Monteros L, Martinez F, Cruz FM, Moreno-Manuel AI, Sanchez P, Vera-Pedrosa ML, Martinez-Carrascoso I, Bermudez-Jimenez F, Macias A, Jalife J. Three dimensional modelling of mutant Kir2.1 channel PIP2 interactions help stratify arrhythmia severity in Andersen Tawil syndrome type 1. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.365] [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: 11/13/2022] Open
Abstract
Abstract
Background
Andersen-Tawil type 1 (ATS1) is associated with loss-of-function mutations in the inward rectifier potassium channel Kir2.1, which controls cardiac excitability and impulse conduction. Phosphatidylinositol-4,5-bisphosphate (PIP2) acts as an essential cofactor regulating the opening of Kir2.1 channels. Fifty percent of reported ATS1 mutations affect Kir2.1-PIP2 interactions, leading to ECG defects, ventricular arrhythmias and sudden cardiac death (SCD) by mechanisms that are poorly understood.
Purpose
To test the hypothesis that the degree of arrhythmogenic severity of ATS1 mutations disrupting PIP2-Kir2.1 binding may be predicted by the level of polarization of the mutant Kir2.1 channel pore.
Methods
We first used a statistical mean value approach to classify the 40 known arrhythmogenic ATS1 mutations impacting Kir2.1-PIP2 interaction (N=260 individuals) according to arrhythmogenic severity, ranging from SCD through ventricular bigeminy and QT prolongation. We then generated 3D in-silico atomic models of the wildtype channel and the 10 mutant channels with the most severe arrhythmic phenotype to assess the mechanism of the structural defects associated with Kir2.1-PIP2 disruption.
Results
Our cardiac lethality scoring stratifying Kir2.1 mutations according to arrhythmogenic severity was validated by three additional biostatical quantitative measures. On in-silico modelling, wildtype Kir2.1 channels without PIP2 binding had transmembrane and cytoplasmic pore radius of 1.5 and 3 Å, respectively. Kir2.1-PIP2 interactions increased transmembrane and cytoplasmic pore radius to 3 and 6 Å, respectively. All 10 Kir2.1 mutations had similar transmembrane and cytoplasmic pore radius of ∼1.0 and ∼3.0 Å, respectively. The most severe mutations yielded pore channels with highly polarized electrostatic forces. Remarkably, simulations showed a descending electrostatic pattern at the transmembrane region of PIP2 binding, where the more severe the mutation, the more positive that region was. Structural changes produced by mutations correlated with cardiac severity (R2=0.51; p<0.005) in that the most drastically altered protein structure correlated with the most severe arrhythmic phenotype.
Conclusions
Computer simulations of mutant Kir2.1 channel structure from the most arrhythmogenic to the least arrhythmogenic predict a gradual decrease in polarization of electrostatic forces along the Kir2.1 channel pore. The results reveal a novel mechanistic stratification of arrhythmogenic severity of ATS1 mutant Kir2.1 channel-PIP2 interactions and open new pathways for developing more personalized ATS1 patient therapies.
Funding Acknowledgement
Type of funding sources: Private grant(s) and/or Sponsorship. Main funding source(s): La Caixa Banking Foundation under the project code HR18-00304Fundaciόn La Marato TV3: Ayudas a la investigaciόn en enfermedades raras 2020
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Affiliation(s)
| | - F Martinez
- Spanish National Centre for Cardiovascular Research , Madrid , Spain
| | - F M Cruz
- Spanish National Centre for Cardiovascular Research , Madrid , Spain
| | - A I Moreno-Manuel
- Spanish National Centre for Cardiovascular Research , Madrid , Spain
| | - P Sanchez
- Spanish National Centre for Cardiovascular Research , Madrid , Spain
| | - M L Vera-Pedrosa
- Spanish National Centre for Cardiovascular Research , Madrid , Spain
| | | | | | - A Macias
- Spanish National Centre for Cardiovascular Research , Madrid , Spain
| | - J Jalife
- University of Michigan , Ann Arbor , United States of America
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Ching KH, Berg K, Reynolds K, Pedersen D, Macias A, Abdiche YN, Harriman WD, Leighton PA. Common light chain chickens produce human antibodies of high affinity and broad epitope coverage for the engineering of bispecifics. MAbs 2021; 13:1862451. [PMID: 33491549 PMCID: PMC7849766 DOI: 10.1080/19420862.2020.1862451] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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] [Indexed: 01/07/2023] Open
Abstract
Bispecific antibodies are an important and growing segment in antibody therapeutics, particularly in the immuno-oncology space. Manufacturing of a bispecific antibody with two different heavy chains is greatly simplified if the light chains can be the same for both arms of the antibody. Here, we introduce a strain of common light chain chickens, called OmniClic®, that produces antibody repertoires largely devoid of light chain diversity. The antibody repertoire in these chickens is composed of diverse human heavy chain variable regions capable of high-affinity antigen-specific binding and broad epitope diversity when paired with the germline human kappa light chain. OmniClic birds can be used in immunization campaigns for discovery of human heavy chains to different targets. Subsequent pairing of the heavy chain with a germline human kappa light chain serves to facilitate bispecific antibody production by increasing the efficiency of correct pairing. Abbreviations: AID: activation-induced cytidine deaminase; bsAb: bispecific antibody; CDR: complementarity-determining region; CL: light chain constant region; CmLC: common light chain; D: diversity region; ELISA: enzyme-linked immunosorbent assay; FACS: fluorescence-activated cell sorting; Fc: fragment crystallizable; FcRn: neonatal Fc receptor; FR: framework region; GEM: gel-encapsulated microenvironment; Ig: immunoglobulin; IMGT: the international ImMunoGeneTics information system®; J: joining region; KO: knockout; mAb: monoclonal antibody; NGS: next-generation sequencing; PBS: phosphate-buffered saline; PCR: polymerase chain reaction; PGC: primordial germ cell; PGRN: progranulin; TCR: T cell receptor; V: variable region; VK: kappa light chain variable region; VL: light chain variable region; VH: heavy chain variable region
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Affiliation(s)
- Kathryn H Ching
- Department of Research and Development, Ligand Pharmaceuticals, Inc ., Emeryville, CA, USA
| | - Kimberley Berg
- Department of Research and Development, Ligand Pharmaceuticals, Inc ., Emeryville, CA, USA.,Department of Molecular and Cellular Biology, Harvard University , Cambridge, MA, USA
| | - Kevin Reynolds
- Department of Research and Development, Ligand Pharmaceuticals, Inc ., Emeryville, CA, USA
| | - Darlene Pedersen
- Department of Research and Development, Ligand Pharmaceuticals, Inc ., Emeryville, CA, USA
| | - Alba Macias
- Department of Structural Biology, Vernalis , Cambridge, UK
| | - Yasmina N Abdiche
- Department of Research and Development, Carterra, Inc. Salt LakeCity, USA(Currently at ImmunoPrecise Antibodies , Fargo, UT, USA
| | - William D Harriman
- Department of Research and Development, Ligand Pharmaceuticals, Inc ., Emeryville, CA, USA
| | - Philip A Leighton
- Department of Research and Development, Ligand Pharmaceuticals, Inc ., Emeryville, CA, USA
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Yamada Y, Takashima H, Walmsley DL, Ushiyama F, Matsuda Y, Kanazawa H, Yamaguchi-Sasaki T, Tanaka-Yamamoto N, Yamagishi J, Kurimoto-Tsuruta R, Ogata Y, Ohtake N, Angove H, Baker L, Harris R, Macias A, Robertson A, Surgenor A, Watanabe H, Nakano K, Mima M, Iwamoto K, Okada A, Takata I, Hitaka K, Tanaka A, Fujita K, Sugiyama H, Hubbard RE. Fragment-Based Discovery of Novel Non-Hydroxamate LpxC Inhibitors with Antibacterial Activity. J Med Chem 2020; 63:14805-14820. [DOI: 10.1021/acs.jmedchem.0c01215] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Yousuke Yamada
- Taisho Pharmaceutical Co., Ltd., Saitama 331-9530, Japan
| | | | | | | | - Yohei Matsuda
- Taisho Pharmaceutical Co., Ltd., Saitama 331-9530, Japan
| | | | | | | | | | | | - Yuya Ogata
- Taisho Pharmaceutical Co., Ltd., Saitama 331-9530, Japan
| | | | - Hayley Angove
- Vernalis (R&D) Ltd., Granta Park, Cambridge CB21 6GB, U.K
| | - Lisa Baker
- Vernalis (R&D) Ltd., Granta Park, Cambridge CB21 6GB, U.K
| | - Richard Harris
- Vernalis (R&D) Ltd., Granta Park, Cambridge CB21 6GB, U.K
| | - Alba Macias
- Vernalis (R&D) Ltd., Granta Park, Cambridge CB21 6GB, U.K
| | - Alan Robertson
- Vernalis (R&D) Ltd., Granta Park, Cambridge CB21 6GB, U.K
| | - Allan Surgenor
- Vernalis (R&D) Ltd., Granta Park, Cambridge CB21 6GB, U.K
| | | | | | - Masashi Mima
- Taisho Pharmaceutical Co., Ltd., Saitama 331-9530, Japan
| | | | - Atsushi Okada
- Taisho Pharmaceutical Co., Ltd., Saitama 331-9530, Japan
| | - Iichiro Takata
- Taisho Pharmaceutical Co., Ltd., Saitama 331-9530, Japan
| | - Kosuke Hitaka
- Taisho Pharmaceutical Co., Ltd., Saitama 331-9530, Japan
| | - Akihiro Tanaka
- Taisho Pharmaceutical Co., Ltd., Saitama 331-9530, Japan
| | - Kiyoko Fujita
- Taisho Pharmaceutical Co., Ltd., Saitama 331-9530, Japan
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Wayne J, Stokes S, Foloppe N, Browne H, Brooks T, Benwell K, Baker L, Daniels Z, Fiumana A, Graham C, Macias A, Maddox D, McKenna S, Northfield C, Ray S, Simmonite H, Stefaniak E, Webb P, Wood M, Massey A. Abstract B163: Identification and preclinical characterisation of VER-250840, a potent, selective Chk1 inhibitor with in vivo oral single-agent antitumor activity. Mol Cancer Ther 2018. [DOI: 10.1158/1535-7163.targ-17-b163] [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] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
On sustaining damage to their DNA, cells employ a sophisticated mechanism of detection and repair, termed the DNA damage response (DDR). As a critical component of the DDR and G2/M checkpoint, Chk1 kinase represents an attractive target for cancer therapy. We have utilized a structure-based drug design approach to identify and develop VER-250840, a novel, orally active inhibitor of the checkpoint kinase, Chk1. VER-250840 exhibited sub-nM potency against Chk1 kinase with exquisite selectivity over an extensive and diverse panel of kinases. In vitro, VER-250840 inhibited Chk1 autophosphorylation with an IC50 of 1.0 nM and increased the number of S-phase tumor cells staining positive for pan-nuclear γH2AX with an EC50 of 7 - 27 nM. Accumulated genomic DNA damage by Chk1 inhibition led to irreversible cell cycle arrest, inhibition of tumor cell proliferation, increased replication stress, and cell death in both 2D culture and multicellular tumor spheroids. In an in vivo A2058 tumor xenograft PD study, VER-250840 demonstrated rapid and sustained inhibition of Chk1 auto-phosphorylation within 30 minutes of oral administration. Doses of 10 mg/kg and higher PO resulted in greater than 90% inhibition of tumor pChk1 (S296) over 24 hours. In SKOV3 in vivo models, VER-250840 inhibited Chk1 auto-phosphorylation, modulated other biomarkers of replication stress and DNA damage, and exhibited moderate antitumor activity with minimal toxicity when administered orally on a 21-day once-daily schedule. Work is ongoing to further optimize in vivo efficacy. In conclusion, VER-250840 demonstrates potent and selective activity as a monotherapy both in vitro and in vivo. From these findings, further evaluation and optimization of this novel kinase inhibitor is justly merited.
Citation Format: Joanne Wayne, Stephen Stokes, Nicolas Foloppe, Helen Browne, Teresa Brooks, Karen Benwell, Lisa Baker, Zoe Daniels, Andrea Fiumana, Christopher Graham, Alba Macias, Daniel Maddox, Sean McKenna, Christopher Northfield, Stuart Ray, Heather Simmonite, Emma Stefaniak, Paul Webb, Mike Wood, Andrew Massey. Identification and preclinical characterisation of VER-250840, a potent, selective Chk1 inhibitor with in vivo oral single-agent antitumor activity [abstract]. In: Proceedings of the AACR-NCI-EORTC International Conference: Molecular Targets and Cancer Therapeutics; 2017 Oct 26-30; Philadelphia, PA. Philadelphia (PA): AACR; Mol Cancer Ther 2018;17(1 Suppl):Abstract nr B163.
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Macias A, Castaño S, Madrazo I, Rodriguez P, Colchero T, Gómez-Sánchez M. 073_16753-K3 Super-Response to Cardiac Resynchronization Therapy in Patients With Dyssynchrony Cardiomyopathy. JACC Clin Electrophysiol 2017. [DOI: 10.1016/j.jacep.2017.09.163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Hernandez M, Neninger E, Ortiz R, Camacho K, Amador R, Bello L, Flores Y, Acosta S, Pichs G, Cala M, Corella M, Jimenez Y, Diaz Y, Viada C, Robina M, Valdes A, Mendoza I, Guerra P, Macias A, Crombet T. Switch maintenance therapy with racotumomab or nimotuzumab vs docetaxel for NSCLC patients. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw378.47] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Moore JD, Staniszewska A, Shaw T, D'Alessandro J, Davis B, Surgenor A, Baker L, Matassova N, Murray J, Macias A, Brough P, Wood M, Mahon PC. VER-246608, a novel pan-isoform ATP competitive inhibitor of pyruvate dehydrogenase kinase, disrupts Warburg metabolism and induces context-dependent cytostasis in cancer cells. Oncotarget 2015; 5:12862-76. [PMID: 25404640 PMCID: PMC4350332 DOI: 10.18632/oncotarget.2656] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Accepted: 11/02/2014] [Indexed: 11/25/2022] Open
Abstract
Pyruvate dehydrogenase kinase (PDK) is a pivotal enzyme in cellular energy metabolism that has previously been implicated in cancer through both RNAi based studies and clinical correlations with poor prognosis in several cancer types. Here, we report the discovery of a novel and selective ATP competitive pan-isoform inhibitor of PDK, VER-246608. Consistent with a PDK mediated MOA, VER-246608 increased pyruvate dehydrogenase complex (PDC) activity, oxygen consumption and attenuated glycolytic activity. However, these effects were only observed under D-glucose-depleted conditions and required almost complete ablation of PDC E1α subunit phosphorylation. VER-246608 was weakly anti-proliferative to cancer cells in standard culture media; however, depletion of either serum or combined D-glucose/L-glutamine resulted in enhanced cellular potency. Furthermore, this condition-selective cytostatic effect correlated with reduced intracellular pyruvate levels and an attenuated compensatory response involving deamination of L-alanine. In addition, VER-246608 was found to potentiate the activity of doxorubicin. In contrast, the lipoamide site inhibitor, Nov3r, demonstrated sub-maximal inhibition of PDK activity and no evidence of cellular activity. These studies suggest that PDK inhibition may be effective under the nutrient-depleted conditions found in the tumour microenvironment and that combination treatments should be explored to reveal the full potential of this therapeutic strategy.
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Affiliation(s)
- Jonathan D Moore
- Vernalis (R&D) Ltd, Granta Park, Cambridge, UK. Current address: Horizon discovery, Cambridge Research Park, Waterbeach, Cambridge, UK
| | | | | | | | - Ben Davis
- Vernalis (R&D) Ltd, Granta Park, Cambridge, UK
| | | | - Lisa Baker
- Vernalis (R&D) Ltd, Granta Park, Cambridge, UK
| | | | | | - Alba Macias
- Vernalis (R&D) Ltd, Granta Park, Cambridge, UK
| | - Paul Brough
- Vernalis (R&D) Ltd, Granta Park, Cambridge, UK
| | - Mike Wood
- Vernalis (R&D) Ltd, Granta Park, Cambridge, UK
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Blanco MT, Andrade C, Macias A. SEM Study of the Corrosion Products of Galvanized Reinforcements Immersed in Solutions in the pH Range 12·6 to 13·6. ACTA ACUST UNITED AC 2013. [DOI: 10.1179/000705984798273524] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Macias A, Andrade C. Corrosion of galvanized steel reinforcements in alkaline solutions: Part 2: SEM study and identification of corrosion products. ACTA ACUST UNITED AC 2013. [DOI: 10.1179/000705987798271749] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Moore J, Staniszewska A, Shaw T, D'Alessandro J, Davis B, Surgenor A, Baker L, Massanova N, Murray J, Macias A, Brough P, Wood M, Mahon PC. Abstract B155: VER-246608, a novel pan-isoform ATP competitive inhibitor of pyruvate dehydrogenase kinase, disrupts Warburg metabolism and demonstrates context-dependent cytotoxicity to cancer cells. Mol Cancer Ther 2013. [DOI: 10.1158/1535-7163.targ-13-b155] [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] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Pyruvate dehydrogenase kinase (PDK) regulates the activity of the pyruvate dehydrogenase complex (PDC) through phosphorylation of three serine residues on the E1α subunit, resulting in decreased activity. The expression of all four mammalian isoforms of PDK have been shown to be up-regulated either under tumour relevant conditions (PDK-1 & PDK-3 by hypoxia) or by the loss of function of common tumour suppressor genes (PDK-2 by p53; PDK-4 by pRB). Furthermore, PDK-1 expression has been clinically correlated with poor prognosis in Gastric, HNSCC and Colon cancer. Previous studies employing RNAi have provided evidence for a survival role for PDK-1 as well as its importance in maintaining the glycolytic phenotype of cancer cells. DCA, a weak inhibitor of PDK, has also been used to study the role of PDK in cancer; however, interpretation of these studies has been complicated by conflicting data and the lack of specificity of this agent for PDK. Here we report the discovery of a novel, potent and selective pan-isoform inhibitor of PDK, VER-246608. Consistent with a PDK mediated MOA, treatment of PC-3 cells with VER-246608 resulted in increased PDC activity and oxygen consumption as well as reduced lactate production and glucose consumption. Interestingly, modulation of glycolytic activity required compound concentrations which achieved > 90 % reduction in E1α phosphorylation and this was only observed under glucose depleted conditions. Under normal culture conditions, VER-246608 showed little cytotoxicity to cancer cells. We hypothesised that the supraphysiological glucose concentrations present in cell culture media may limit the effect of PDK inhibition due to elevated intracellular pyruvate levels. We therefore performed cytotoxicity studies under conditions of limited nutrient availability. We found that combined depletion of glucose and glutamine or serum alone resulted in enhanced cytotoxicity vs normal media; however, hypoxic conditions had no effect. Furthermore, this differential cytotoxicity correlated with reduced pyruvate levels in the compound treated cells cultured in the above ‘austere’ conditions. VER-246608 also inhibited the growth of tumour spheroids with a potency that was comparable to cells grown in 2D culture. In addition, combination treatment studies revealed that VER-246608 potentiated anti-cancer agents which are known to influence mitochondrial function. In contrast, the lipoamide binding site inhibitor, Nov3r, showed no evidence of cytotoxicity under any of the above conditions and was ineffective in altering glycolytic activity. These studies suggest that PDK inhibition may be effective under the nutrient depleted conditions found in the tumour microenvironment and that combination treatments should be explored to reveal the full potential of this therapeutic strategy.
Citation Information: Mol Cancer Ther 2013;12(11 Suppl):B155.
Citation Format: Jonathan Moore, Anna Staniszewska, Terence Shaw, Jalanie D'Alessandro, Ben Davis, Alan Surgenor, Lisa Baker, Natalia Massanova, James Murray, Alba Macias, Paul Brough, Mike Wood, Patrick C. Mahon. VER-246608, a novel pan-isoform ATP competitive inhibitor of pyruvate dehydrogenase kinase, disrupts Warburg metabolism and demonstrates context-dependent cytotoxicity to cancer cells. [abstract]. In: Proceedings of the AACR-NCI-EORTC International Conference: Molecular Targets and Cancer Therapeutics; 2013 Oct 19-23; Boston, MA. Philadelphia (PA): AACR; Mol Cancer Ther 2013;12(11 Suppl):Abstract nr B155.
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Affiliation(s)
| | | | | | | | - Ben Davis
- 2Vernalis (R&D) Ltd., Cambridge, United Kingdom
| | | | - Lisa Baker
- 2Vernalis (R&D) Ltd., Cambridge, United Kingdom
| | | | | | - Alba Macias
- 2Vernalis (R&D) Ltd., Cambridge, United Kingdom
| | - Paul Brough
- 2Vernalis (R&D) Ltd., Cambridge, United Kingdom
| | - Mike Wood
- 2Vernalis (R&D) Ltd., Cambridge, United Kingdom
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Deshmukh A, Sharma SS, Gobal FG, Singla SS, Hebbar PH, Paydak HP, Igarashi M, Tada H, Sekiguchi Y, Yamasaki H, Kuroki K, Machino T, Yoshida K, Aonuma K, Shavadia J, Otieno H, Yonga G, Jinah A, Qvist JF, Soerensen PH, Dixen U, Ramirez-Marrero MA, Perez-Villardon B, Gaitan-Roman D, Jimenez-Navarro M, Delgado-Prieto JL, De Teresa-Galvan E, De Mora-Martin M, Deshmukh A, Hebbar PB, Wei WX, Gobal FG, Singla SS, Sharma SS, Paydak HP, Bardari S, Zecchin M, Salame' R, Vitali Serdoz L, Di Lenarda A, Guerrini N, Barbati G, Sinagra G, Hanazawa K, Kaitani K, Nakagawa Y, Lenaerts I, Driesen R, Hermida N, Heidbuchel H, Janssens S, Balligand JL, Sipido KR, Willems R, Sehra R, Krummen D, Briggs C, Narayan S, Tanaka Y, Hirao K, Nakamura T, Inaba O, Yagishita A, Higuchi K, Hachiya H, Isobe M, Kallergis E, Kanoupakis EM, Mavrakis HE, Goudis CA, Maliaraki NE, Vardas PE, Sehra R, Krummen D, Briggs C, Narayan S, Kiuchi K, Piorkowski C, Kircher S, Gaspar T, Watanabe N, Bollmann A, Hindricks G, Wauters K, Grosse A, Raffa S, Brunelli M, Geller JC, Maggioni AP, Gonzini L, Gussoni G, Vescovo G, Gulizia M, Pirelli S, Mathieu G, Di Pasquale G, Zecchin M, Bardari S, Vitali Serdoz L, Salame R, Buja G, Rovai N, Gargaro A, Sperzel J, Knops RE, Meine M, Speca G, Santini L, Haarbo J, Dubin K, Di Lenarda A, Carlson M, Garcia Quintana A, Mendoza-Lemes H, Garcia Perez L, Led Ramos S, Caballero Dorta E, Matinez De Espronceda M, Piro Mastracchio V, Serrano Arriezu L, Sciarra L, Barbati G, Marziali M, Marras E, Rebecchi M, Allocca G, Lioy E, Delise P, Calo' L, Santobuono VE, Iacoviello M, Nacci F, Magnani S, Luzzi G, Puzzovivo A, Memeo M, Quadrini F, Favale S, Trucco ME, Arce M, Palazzolo J, Uribe W, Baranchuk A, Sinagra G, Femenia F, Maggi R, Furukawa T, Croci F, Solano A, Brignole M, Lebreiro A, Sousa A, Correia AS, Lourenco P, Sakamoto T, Oliveira S, Paiva M, Freitas J, Maciel MJ, Linker N, Rieger G, Garutti C, Edvardsson N, Salguero Bodes R, De Riva Silva M, Kumagai K, Fontenla Cerezuela A, Lopez 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Sachar J, Gang E, Estrada A, Doiny D, De Miguel E, Merino JL, Vergara P, Trevisi N, Ricco A, Petracca F, Baratto F, Bisceglie A, Maccabelli G, Della Bella P, El-Damaty A, Sapp J, Warren J, Macinnis P, Horacek M, Dinov B, Schoenbauer R, Piorkowski C, Bollmann A, Sommer P, Braunschweig F, Hindricks G, Arya A, Andreu D, Berruezo A, Ortiz JT, Silva E, Mont L, De Caralt TM, Fernandez-Armenta J, Brugada J, Castrejon Castrejon S, Estrada A, Doiny D, Perez-Silva A, Ortega M, Lopez-Sendon JL, Merino JL, Regoli F, Faletra F, Nucifora G, Pasotti E, Moccetti T, Klersy C, Auricchio A, Casella M, Dello Russo A, Moltrasio M, Zucchetti M, Fassini G, Di Biase L, Natale A, Tondo C, Sakamoto T, Kumagai K, Matsuhashi N, Nishiuchi S, Fuke E, Hayashi T, Naito S, Oshima S, Weig HJ, Kerst G, Weretk S, Seizer P, Gawaz MP, Schreieck J, Sarquella-Brugada G, Prada F, Brugada J, Reents T, Ammar S, Fichtner S, Salling CM, Jilek C, Kolb C, Hessling G, Deisenhofer I, Pytkowski M, Maciag A, Farkowski M, Jankowska A, 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M, Steffel J, Jetzer S, Bayrak F, Chierchia GB, Jenni R, Duru F, Brugada P, Bakos Z, Medvedev M MM, Jonas Carlsson JC, Fredrik Holmqvist FH, Pyotr Platonov PP, Nurbaev T, Pirnazarov M, Nikishin A, Aagaard P, Sahlen A, Bergfeldt L, Braunschweig F, Simeonidou E, Kastellanos S, Varounis C, Michalakeas C, Koniari C, Nikolopoulou A, Anastasiou-Nana M, Furukawa Y, Yamada T, Morita T, Tanaka K, Iwasaki Y, Kawasaki M, Kuramoto Y, Fukunami M, Blanche C, Tran N, Rigamonti F, Zimmermann M, Okisheva E, Tsaregorodtsev D, Sulimov V, Novikova D, Popkova T, Udachkina E, Korsakova Y, Volkov A, Novikov A, Alexandrova E, Nasonov E, Arsenos P, Gatzoulis K, Manis G, Dilaveris P, Gialernios T, Kartsagoulis E, Asimakopoulos S, Stefanadis C, Marocolo M, Barbosa Neto O, Carvalho AC, Marques Neto SR, Mota GR, Barbosa PRB, Fernandez-Fernandez A, Manzano Fernandez S, Pastor-Perez FJ, Barquero-Perez O, Goya-Esteban R, Salar M, Rojo-Alvarez JL, Garcia-Alberola A, Takigawa M, Kawamura M, Aiba T, Kamakura S, Sakaguchi T, Itoh H, Horie M, Shimizu W, Miyazaki A, Sakaguchi H, Yamamoto T, Igarashi T, Negishi J, Toyota N, Ohuchi H, Yamada O, Arsenos P, Gatzoulis K, Manis G, Dilaveris P, Gialernios T, Papavasileiou M, Asimakopoulos S, Stefanadis C, Cabrera Bueno F, Molina Mora MJ, Alzueta Rodriguez J, Barrera Cordero A, De Teresa Galvan E, Revishvili AS, Dzhordzhikiya T, Sopov O, Simonyan G, Lyadzhina O, Fetisova E, Kalinin V, Balt JC, Steggerda RC, Boersma LVA, Wijffels MCEF, Wever EFD, Ten Berg JM, Ricci RP, Morichelli L, D'onofrio A, Zanotto G, Vaccari D, Calo' L. Poster Session 1. Europace 2011. [DOI: 10.1093/europace/eur220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Tada H, Yamasaki H, Sekiguchi Y, Igarashi M, Kuroki K, Machino T, Yoshida K, Aonuma K, Heinzel FR, Forstner H, Lercher P, Bisping E, Rotman B, Fruhwald FM, Pieske BM, Dabrowski R, Kowalik I, Borowiec A, Smolis-Bak E, Trybuch A, Sosnowski C, Szwed H, Baturova MA, Lindgren A, Shubik YV, Olsson B, Platonov PG, Van Den Broek KC, Denollet J, Widdershoven J, Kupper N, Allam R, Allam RAGAB, Galal WAGDY, El-Damnhoury HAYAM, Mortada AYMAN, Jimenez-Candil J, Martin A, Hernandez J, Martin F, Gallego M, Martin-Luengo C, Quintanilla JG, Moreno Planas J, Molina-Morua R, Archondo T, Garcia-Torrent MJ, Perez-Castellano N, Macaya C, Perez-Villacastin J, Saiz J, Tobon C, Rodriguez JF, Hornero F, Ferrero JM, Ito K, Date T, Kawai M, Hioki M, Narui R, Matsuo S, Yoshimura M, Yamane T, Tabatabaei N, Lin G, Powell BD, Smairat R, Glockner JF, Brady PA, Fichtner S, Czudnochowsky U, Estner H, Reents T, Jilek C, Ammar S, Hessling G, Deisenhofer I, Shah DC, Kautzner J, Saoudi N, Herrera C, Jais P, Hindricks G, 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Sasaki T, Mizuno K, Miyake F, Adragao PP, Cavaco D, Miranda R, Santos M, Morgado F, Reis Santos K, Candeias R, Marcelino S, Zoppo F, Grandolino G, Zerbo F, Bertaglia E, Schlueter SM, Grebe O, Vester EG, Miracle Blanco AL, Arenal Maiz A, Atienza Fernandez F, Datino Romaniega T, Gonzalez Torrecilla E, Eidelman G, Hernandez Hernandez J, Fernandez Aviles F, Fukumoto K, Takatsuki S, Kimura T, Nishiyama N, Aizawa Y, Sato T, Miyoshi S, Fukuda K, Richter B, Gwechenberger M, Socas A, Zorn G, Albinni S, Marx M, Wojta J, Goessinger H, Deneke T, Balta O, Paesler M, Buenz K, Anders H, Horlitz M, Muegge A, Shin DI, Natsuyama K, Yamaguchi KM, Nishida YN, De Bortoli A, Ohm OJ, Hoff PI, Solheim E, Schuster P, Sun LZ, Chen J, Kosiuk J, Bode K, Arya A, Piorkowski C, Gaspar T, Sommer P, Hindricks G, Bollmann A, Wichterle D, Peichl P, Simek J, Havranek S, Bulkova V, Cihak R, Kautzner J, Jurado Roman A, Salguero Bodes R, Lopez Gil M, Fontenla Cerezuela A, De Riva Silva M, Arribas Ynsaurriaga F, Fernandez 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Doevendans PA, Meine M, Thibault B, Dubuc M, Karst E, Ryu K, Paiement P, Farazi T, Puetz V, Berndt C, Buchholz J, Dorszewski A, Mornos C, Cozma D, Ionac A, Petrescu L, Mornos A, Pescariu S, Puetz V, Berndt C, Buchholz J, Dorszewski A, Benser M, Roscoe G, De Jong S, Roberts G, Boileau P, Rec A, Ryu K, Folman C, Morttada A, Abd El Kader M, Samir R, Roushdy R, Khaled S, Abo El Maaty M, Van Gelder B, Houthuizen P, Bracke FA, Osca Asensi J, Tejada D, Sanchez JM, Munoz B, Cano O, Rodriguez M, Sancho-Tello MJ, Olague J, Hou W, Rosenberg S, Koh S, Poore J, Snell J, Yang M, Nirav D, Bornzin G, Deering T, Dan D, Wickliffe AC, Cazeau S, Karimzadeh K, Mukerji S, Loghin C, Kantharia B, Bogaard MD, Leenders GE, Maskara B, Tuinenburg AE, Loh P, Hauer RN, Doevendans PA, Meine M, Betts TR, Jones MA, Wong KCK, Qureshi N, Rajappan K, Bashir Y, Lamba J, Simpson CS, Redfearn DP, Michael KA, Fitzpatrick M, Baranchuk A, Heinke M, Ismer B, Kuehnert H, Surber R, Haltenberger AM, Prochnau D, Figulla HR, 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M, Goya M, Hiroshima K, Ohe M, Hayashi K, Iwabuchi M, Nosaka H, Nobuyoshi M, Doiny D, Perez-Silva A, Castrejon Castrejon S, Estrada A, Ortega M, Lopez-Sendon JL, Merino JL, Garcia Fernandez FJ, Gallardo R, Pachon M, Almendral J, Gonzalez Torrecilla E, Martin J, Yahya D, Al-Mogheer B, Gouda S, Eweis E, El Ramly M, Abdelwahab A, Kassenberg W, Wittkampf FHM, Hof IE, Heijden JH, Neven KGEJ, Meine M, Hauer RNW, Loh P, Baratto F, Bignami E, Pappalardo F, Maccabelli G, Nicolotti D, Zangrillo A, Della Bella P, Hayashi K, Goya M, Hiroshima K, Nagashima M, An Y, Fukunaga M, Okreglicki A, Russouw C, Tilz R, Yoshiga Y, Mathew S, Fuernkranz A, Rillig A, Wissner E, Kuck KH, Ouyang F, De Sisti A, Tonet J, Gueffaf F, Amara W, Touil F, Aouate P, Hidden-Lucet F, Doiny D, Castrejon Castrejon S, Estrada A, Ortega M, Perez-Silva A, Lopez-Sendon JL, Merino JL, Makimoto H, Satomi K, Yamada Y, Okamura H, Noda T, Shimizu W, Aihara N, Kamakura S, Estrada A, Perez Silva A, Doiny D, Castrejon S, Gonzalez Vasserot M, Merino JL, Tilz R, Senges J, Brachmann J, Andresen D, Hoffmann E, Schumacher B, Willems S, Kuck KH, Reents T, Deisenhofer I, Ammar S, Springer B, Fichtner S, Jilek C, Kolb C, Hessling G, Akca F, Bauernfeind T, De Groot NMS, Schwagten B, Witsenburg M, Jordaens L, Szili-Torok T, Hata Y, Nakagami R, Watanabe T, Sato A, Watanabe H, Kabutoya T, Mituhashi T, Theuns DAMJ, Smith T, Pedersen SS, Dabiri-Abkenari L, Jordaens L, Prull MW, Unverricht S, Bittlinsky A, Wirdemann H, Sasko B, Wirdeier S, Trappe HJ, Zorio Grima E, Rueda J, Medina P, Jaijo T, Sevilla T, Osca J, Arnau MA, Salvador A, Starrenburg AH, Kraaier K, Pedersen SS, Scholten MF, Van Der Palen J, De Haan S, Commandeur J, De Boer K, Beek AM, Van Rossum AC, Allaart CP, Berne P, Porres JM, Fernandez-Lozano I, Arnaiz JA, Mont L, Berruezo A, Brugada R, Brugada J, Man S, Maan AC, Thijssen J, Van Der Wall EE, Schalij MJ, Burattini L, Burattini R, Swenne CA, Bonny A, Hidden-Lucet F, Ditah I, Larrazet F, Frank R, Fontaine G, Van Den Broek KC, Pedersen SS, Theuns DAMJ, Jordaens L, Van Der Voort PH, Alings M, Denollet J, Shimane A, Okajima K, Kanda G, Yokoi K, Yamada S, Taniguchi Y, Hayashi T, Kajiya T, Santos MC, Wright J, Betts J, Denman R, Dominguez-Perez L, Arias Palomares MA, Toquero J, Jimenez-Candil J, Olague J, Diaz-Infante E, Tercedor L, Valverde I, Miracle Blanco AL, Datino Romaniega T, Arenal Maiz A, Atienza Fernandez F, Gonzalez Torrecilla E, Eidelman G, Hernandez Hernandez J, Fernandez Aviles F, Napp A, Joosten S, Stunder D, Zink M, Marx N, Schauerte P, Silny J, Trucco ME, Arce M, Palazzolo J, Femenia F, Glad JM, Szymkiewicz SJ, Glad JM, Szymkiewicz SJ, Fernandez-Armenta J, Camara O, Mont LL, Andreu D, Diaz E, Silva E, Frangi A, Berruezo A, Brembilla-Perrot B, Laporte F, Jimenez-Candil J, Martin A, Gallego M, Morinigo J, Ledesma C, Martin-Luengo C, Hadid C, Almendral J, Ortiz M, Quesada A, Wolpert C, Cobo E, Navarro X, Arribas F, Miki Y, Naitoh S, Kumagai K, Goto K, Kaseno K, Oshima S, Taniguchi K, Rivera S, Scazzuso F, Albina G, Klein A, Laino R, Sammartino V, Giniger A, Fukumoto K, Takatsuki S, Kimura T, Nishiyama N, Aizawa Y, Sato T, Miyoshi S, Fukuda K, Muggenthaler M, Raju H, Papadakis M, Chandra N, Bastiaenen R, Behr ER, Sharma S, Samniah N, Radezishvsky Y, Omari H, Rosenschein U, Perez Riera AR, Ferreira M, Hopman WM, Mcintyre WF, Baranchuk AR, Wongcharoen W, Keanprasit K, Phrommintikul A, Chaiwarith R, Yagishita A, Hachiya H, Nakamura T, Tanaka Y, Higuchi K, Kawabata M, Hirao K, Isobe M, Havranek S, Simek J, Wichterle D, Stoickov V, Ilic S, Deljanin Ilic M, Aagaard P, Sahlen A, Bergfeldt L, Braunschweig F, Sousa A, Lebreiro A, Sousa C, Oliveira S, Correia AS, Rangel I, Freitas J, Maciel MJ, Asensio Lafuente E, Aguilera AAC, Corral MACC, Mendoza KLMC, Nava PEND, Rendon ALRC, Villegas LVC, Castillo LCM, Schaerf R, Develle R, Brembilla-Perrot B, Oliver C, Zinzius PY, Providencia RA, Botelho A, Trigo J, Nascimento J, Quintal N, Mota P, Leitao-Marques AM, Borbola J, Abraham P, Foldesi CS, Kardos A, Miranda R, Almeida S, Santos MB, Cavaco D, Quaresma R, Morgado FB, Adragao P, Fatemi M, Didier R, Le Gal G, Etienne Y, Jobic Y, Gilard M, Boschat J, Mansourati J, Zubaid M, Rashed W, Alsheikh-Ali A, Almahmeed W, Shehab A, Sulaiman K, Asaad N, Amin H, Boersma LVA, Swaans M, Post M, Rensing B, Jarverud K, Broome M, Noren K, Svensson T, Hjelm S, Hollmark M, Bjorling A, Providencia RA, Botelho A, Trigo J, Nascimento J, Quintal N, Mota P, Leitao-Marques AM, Maeda K, Takagi M, Suzuki K, Tatsumi H, Yoshiyama M, Simeonidou E, Michalakeas C, Kastellanos S, Varounis C, Nikolopoulou A, Koniari C, Anastasiou-Nana M, Furukawa T, Maggi R, Bertolone C, Fontana D, Brignole M, Pietrucha AZ, Wnuk M, Bzukala I, Mroczek-Czernecka D, Konduracka E, Kruszelnicka O. Poster Session 4. Europace 2011. [DOI: 10.1093/europace/eur231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Pytkowski M, Firek B, Jankowska A, Szwed H, Nakajima I, Noda T, Okamura H, Satomi K, Aiba T, Shimizu W, Aihara N, Kamakura S, Brzozowski W, Tomaszewski A, Kutarski A, Wysokinski A, Bertoldi EG, Rohde LE, Zimerman LI, Pimentel M, Polanczyk CA, Boriani G, Lunati M, Gasparini M, Landolina M, Lonardi G, Pecora D, Santini M, Valsecchi S, Rubinstein BJ, Wang DY, Cabreriza SE, Richmond ME, Rusanov A, Quinn TA, Cheng B, Spotnitz HM, Kristiansen HM, Vollan G, Hovstad T, Keilegavlen H, Faerestrand S, Kawata H, Phan H, Anand K, Feld G, Brigesdotter-Green U, Nawar AMR, Ragab DALIA, Eluhsseiny RANIA, Abdelaziz AHMED, Nof E, Abu Shama R, Buber J, Kuperstein R, Feinberg MS, Barlev D, Eldar M, Glikson M, Badran H, Samir R, Tawfik M, Amin M, Eldamnhoury H, Khaled S, Tolosana JM, Martin AM, Hernandez-Madrid A, Macias A, Fernandez-Lozano I, Osca J, Quesada A, Mont L, Boriani G, Gasparini M, Landolina M, Lunati M, Santini M, Padeletti L, Botto GL, De Santo T, Lunati M, Szwed A, Martinez JG, Degand B, Villani GQ, Leclercq C, Rousseauplasse A, Ritter P, Estrada A, Doiny D, Castrejon Castrejon S, Perez-Silva A, Ortega M, Lopez-Sendon JL, Merino JL, Watanabe I, Nagashima K, Okumura Y, Kofune M, Ohkubo K, Nakai T, Hirayama A, Mikhaylov E, Vander M, Lebedev D, Zarse M, Suleimann H, Bogossian H, Stegelmeyer J, Ninios I, Karosienne Z, Kloppe A, Lemke B, John S, Gaspar T, Rolf S, Sommer P, Hindricks G, Piorkowski C, Berruezo A, Fernandez-Armenta J, Mont LL, Zeljko H, Andreu D, Herzcku C, Boussy T, Brugada J, Yamauchi Y, Okada H, Maeda S, Tao S, Obayahi T, Aonuma K, Hegrenes J, Lim E, Mediratta V, Bautista R, Teplitsky L, Van Huls Van Taxis CFB, Wijnmaalen AP, Gawrysiak M, Schuijf JD, Bax JJ, Schalij MJ, Zeppenfeld K, Huo Y, Richter S, Hindricks G, Arya A, Gaspar T, Bollmann A, Akca F, Bauernfeind T, Schwagten B, De Groot NMS, Jordaens L, Szili-Torok T, Hegrenes J, Miller S, Kastner G, Teplitsky L, Maury P, Della Bella P, Delacretaz E, Sacher F, Maccabelli G, Brenner R, Rollin A, Jais P, Vergara P, Trevisi N, Ricco A, Petracca F, Bisceglia C, Baratto F, Maccabelli G, Della Bella P, Salguero Bodes R, Fontenla Cerezuela A, De Riva Silva M, Lopez Gil M, Mejia Martinez E, Jurado Roman A, Montero Alvarez M, Arribas Ynsaurriaga F, Baszko A, Krzyzanowski K, Bobkowski W, Surmacz R, Zinka E, Siwinska A, Szyszka A, Perez Silva A, Doiny D, Castrejon Castrejon S, Estrada Mucci A, Ortega Molina M, Lopez Sendon JL, Merino Llorens JL, Kaitani K, Hanazawa K, Izumi C, Nakagawa Y, Yamanaka I, Hirahara T, Sugawara Y, Suga C, Ako J, Momomura S, Galizio N, Gonzalez J, Robles F, Palazzo A, Favaloro L, Diez M, Guevara E, Fernandez A, Greenberg S, Epstein A, Deering T, Goldman DS, Sangli C, Keeney JA, Lee K, Piers SRD, Van Rees JB, Thijssen J, Borleffs CJW, Van Der Velde ET, Van Erven L, Schalij MJ, Leclercq CH, Hero M, Mizobuchi M, Enjoji Y, Yazaki Y, Shibata K, Funatsu A, Kobayashi T, Nakamura S, Amit G, Pertzov B, Katz A, Zahger D, Robles F, Galizio N, Gonzalez J, Medesani L, Rana R, Palazzo A, Albano F, Fraguas H, Pedersen SS, Hoogwegt MT, Jordaens L, Theuns DAMJ, Van Den Broek KC, Tekle FB, Habibovic M, Alings M, Van Der Voort P, Denollet J, Vrazic H, Jilek C, Badran H, Lesevic H, Tzeis S, Semmler V, Deisenhofer I, Kolb C, Theuns DAMJ, Gold MR, Burke MC, Bardy GH, Varma N, Pavri B, Stambler B, Michalski J, Investigators TRUST, Safak E, Schmitz D, Konorza T, Wende C, Schirdewan A, Neuzner J, Simmers T, Erglis A, Gradaus R, Alings M, Goetzke J, Coutrot L, Goehl K, Bazan Gelizo V, Grau N, Valles E, Felez M, Sanjuas C, Bruguera J, Marti-Almor J, Chu SY, Li PW, Ding WH, Schukro C, Leitner L, Siebermair J, Stix G, Pezawas T, Kastner J, Wolzt M, Schmidinger H, Behar NATHALIE, Kervio G, Petit B, Maison-Balnche P, Bodi S, Mabo P, Foley PWX, Mutch E, Brashaw-Smith J, Ball L, Leyva F, Kim DH, Lee MJ, Lee WS, Park SD, Shin SH, Woo SI, Kwan J, Park KS, Munetsugu Y, Tanno K, Kikuchi M, Ito H, Miyoshi F, Kawamura M, Kobayashi Y, Man S, Algra AM, Schreurs CA, Van Erven L, Van Der Wall EE, Cannegieter SC, Schalij MJ, Swenne CA, Adachi M, Yano A, Miake J, Ogura K, Kato M, Iitsuka K, Kondo T, Zarse M, Goebbert K, Bogossian H, Karossiene Z, Stegelmeyer J, Ninios I, Kloppe A, Lemke B, Goldman D, Kallen B, Kerpi E, Sardo J, Arsenos P, Gatzoulis K, Manis G, Dilaveris P, Tsiachris D, Mytas D, Asimakopoulos S, Stefanadis C, Arsenos P, Gatzoulis K, Manis G, Dilaveris P, Sideris S, Kartsagoulis E, Mytas D, Stefanadis C, Barbosa O, Marocolo Junior M, Silva Cortes R, Moraes Brandolis RA, Oliveira LF, Pertili Rodrigues De Resende LA, Vieira Da Silva MA, Dias Da Silva VJ, Hegazy RA, Sharaf IA, Fadel F, Bazaraa H, Esam R, Deshko MS, Snezhitsky VA, Stempen TP, Kuroki K, Tada H, Igawa M, Yoshida K, Igarashi M, Sekiguchi Y, Kuga K, Aonuma K, Ferreira Santos L, Dionisio T, Nunes L, Machado J, Castedo S, Henriques C, Matos A, Oliveira Santos J, Kraaier K. Poster Session 3. Europace 2011. [DOI: 10.1093/europace/eur229] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Macias A, Toledo D, Santiesteban E, Aguirre F, Popa X, Vazquez A, Mazorra Z, Crombet T, Perez R. 1249 Combination of platinum standard first front line chemotherapy and anti-idiotype 1E10/aluminum vaccine in patients with advanced non- small- cell lung cancer (NSCLC). EJC Suppl 2009. [DOI: 10.1016/s1359-6349(09)70461-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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York MK, Dulay M, Macias A, Levin HS, Grossman R, Simpson R, Jankovic J. Cognitive declines following bilateral subthalamic nucleus deep brain stimulation for the treatment of Parkinson's disease. J Neurol Neurosurg Psychiatry 2008; 79:789-95. [PMID: 17965146 DOI: 10.1136/jnnp.2007.118786] [Citation(s) in RCA: 114] [Impact Index Per Article: 7.1] [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: 11/04/2022]
Abstract
BACKGROUND We investigated the cognitive and psychiatric outcome 6 months after bilateral subthalamic nucleus deep brain stimulation (DBS) for the treatment of Parkinson's disease (PD) using a disease control group. METHODS 23 patients who underwent DBS were compared with 28 medically treated patients with PD at baseline and at 6 months for neuropsychological measures. In addition to the group outcomes, we report reliable change indices (RCI) and a dementia caseness analysis. RESULTS Patients who underwent DBS demonstrated a significant decline in verbal memory compared with the control group (p<0.003), and trends for decline on oral information processing, including verbal fluency, timed transcription and word naming. Patients who underwent DBS demonstrated declines in attention, set shifting and semantic fluency but these changes were similar to the rate of decline in the PD group. RCI indicated that patients who underwent DBS demonstrated clinically significant declines in verbal fluency (p<0.01) and inhibition of a dominant response (p<0.003), with trends for declines in set shifting (p<0.02) and verbal long term recall (p<0.08), indicative of frontostriatal dysfunction. Patients who underwent DBS did not demonstrate significant changes in depression, anxiety or psychological distress scores. The caseness analysis revealed that one of the patients who underwent DBS (4%) converted to dementia over 6 months compared with none of the PD controls. CONCLUSIONS Our findings demonstrated that patients who underwent DBS experienced declines in verbal recall and trends for declines in oral information processing 6 months following surgery, even when good motor outcome was achieved. Potential candidates should be counselled about the risk of mild frontostriatal cognitive declines following DBS to weigh the risks and benefits of surgery.
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Affiliation(s)
- M K York
- Baylor College of Medicine, Department of Neurology, 6501 Fannin, NB302, Houston, Texas 77030, USA.
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Garcia-Bolao I, Macias A, Moreno J, Martin A. Fatal left internal mammary artery graft to subclavian vein fistula complicating dual-chamber pacemaker implantation. Europace 2008; 10:890-1. [DOI: 10.1093/europace/eun057] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Garcia-Bolao I, Lopez B, Macias A, Gavira JJ, Azcarate P, Diez J. Impact of collagen type I turnover on the long-term response to cardiac resynchronization therapy. Eur Heart J 2008; 29:898-906. [DOI: 10.1093/eurheartj/ehn098] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Macias A, Torres A, Montenegro A, Marinello P, Rodriguez R, Mulens V, Carr A, Mazorra Z, Perez R, Fernandez L. 2110 POSTER Active specific immunotherapy with NGcGM3/ VSSP/ Montanide ISA-51 (CIMAVaxG) vaccine in the treatment of patients with metastatic breast cancer: Results of a randomized phase II clinical trial. EJC Suppl 2007. [DOI: 10.1016/s1359-6349(07)70872-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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York MK, Lai EC, Jankovic J, Macias A, Atassi F, Levin HS, Grossman RG. Short and long-term motor and cognitive outcome of staged bilateral pallidotomy: a retrospective analysis. Acta Neurochir (Wien) 2007; 149:857-66; discussion 866. [PMID: 17624489 DOI: 10.1007/s00701-007-1242-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2006] [Accepted: 06/11/2007] [Indexed: 10/23/2022]
Abstract
BACKGROUND We investigated retrospectively the short and long-term motor and cognitive functioning of staged bilateral pallidotomy using motor testing and a comprehensive neuropsychological battery before and after each procedure. METHODS Fifteen patients with idiopathic Parkinson's disease were assessed at baseline and at least 3 months after each of their two staged surgeries. Motor and neuropsychological results were compared to 15 non-surgical Parkinson's disease patients matched for disease stage and mental status. In addition, nine bilateral pallidotomy patients were evaluated for long-term cognitive changes (>2 years). FINDINGS Bilateral pallidotomy patients demonstrated significant improvements in motor functioning in the "on" and "off" states and with dyskinesias after the first surgery, with an additional improvement reported for dyskinesias after the second procedure. On long-term follow-up, dyskinesia improvements were maintained. Bilateral pallidotomy patients did not show significant cognitive declines following both procedures on the short-term follow-up and when compared to the Parkinson's disease group. However, significant cognitive declines were found on the long-term follow-up evaluation. CONCLUSIONS Parkinson's disease patients received significant short- and long-term motor benefits, particularly reduced dyskinesias, following staged bilateral pallidotomy without significant short-term cognitive consequences. Two years following the second procedure, bilateral pallidotomy patients tended to show an increase in both motor and non-motor symptoms of Parkinson's disease, particularly cognitive decline.
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Affiliation(s)
- M K York
- Department of Neurology, Baylor College of Medicine, Houston, Texas 77030, USA.
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Hancock CN, Macias A, Lee EK, Yu SY, Mackerell AD, Shapiro P. Identification of novel extracellular signal-regulated kinase docking domain inhibitors. J Med Chem 2005; 48:4586-95. [PMID: 15999996 DOI: 10.1021/jm0501174] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The extracellular signal regulated kinase (ERK1 and ERK2) signal transduction pathways play a critical role in cell proliferation. Hyperactivation of the ERK proteins either through increased expression of membrane-bound growth factor receptors or genetic mutations of upstream proteins is thought to be involved in the pathogenesis of many human cancers. Thus, targeted inhibition of ERK signaling is viewed as a potential approach to prevent cancer cell proliferation. Currently, no specific inhibitors of the ERK proteins exist. Moreover, most kinase inhibitors lack specificity because they target the ATP binding region, which is well conserved among the protein kinase families. Taking advantage of recently identified ERK docking domains, which are reported to facilitate substrate protein interactions, we have used computer-aided drug design (CADD) to identify novel small molecular weight ERK inhibitors. Following a CADD screen of over 800 000 molecules, 80 potential compounds were selected and tested for activity in biological assays. Several compounds inhibited ERK-specific phosphorylation of ribosomal S6 kinase-1 (Rsk-1) or the ternary complex factor Elk-1 (TCF/Elk-1), both of which are involved in promoting cell proliferation. Active compounds showed a dose-dependent reduction in the proliferation of several cancer cell lines as measured by colony survival assays. Direct binding between the active compounds and ERK2 was indicated by fluorescence quenching. These active compounds may serve as lead candidates for development of novel specific inhibitors of ERK-substrate interactions involved in cell proliferation.
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Affiliation(s)
- Chad N Hancock
- Department of Pharmaceutical Sciences, School of Pharmacy, and Molecular and Cell Biology Program, University of Maryland, Baltimore, 21201, USA
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Macias A, Mont L, Garcia-Bolao I, Diaz-Infante E, Chapela M, Tamborero D, Vidal B, Sitges M, Brugada J. 615 Cardiac resynchronization therapy: predictive factors of unsuccessful implant of left ventricular lead. Europace 2005. [DOI: 10.1016/eupace/7.supplement_1.139-b] [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: 11/26/2022] Open
Affiliation(s)
- A. Macias
- Clinic, Cardiologia, Barcelona, Spain
| | - L.L. Mont
- Clinic, Cardiologia, Barcelona, Spain
| | - I. Garcia-Bolao
- Clinica Universitaria de Navarra, Cardiologia, Pamplona, Spain
| | | | | | | | - B. Vidal
- Clinic, Cardiologia, Barcelona, Spain
| | - M. Sitges
- Clinic, Cardiologia, Barcelona, Spain
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Tamborero D, Mont Girbau J, Macias A, Diaz-Infante E, Chapela M, Matiello M, Verbal F, Brugada J. 641 Improvement of left ventricle pacing parameters by optimized pacing configuration in resynchronization therapy. Europace 2005. [DOI: 10.1016/eupace/7.supplement_1.147-b] [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: 11/27/2022] Open
Affiliation(s)
- D. Tamborero
- Cardiovascular Institute, Hospital Cl nic Universitari, Barcelona, Spain
| | - J.L. Mont Girbau
- IMCV Hospital Clinic, Department of Cardiology, Barcelona, Spain
| | - A. Macias
- Cardiovascular Institute, Hospital Cl nic Universitari, Barcelona, Spain
| | - E. Diaz-Infante
- Cardiovascular Institute, Hospital Cl nic Universitari, Barcelona, Spain
| | - M. Chapela
- Cardiovascular Institute, Hospital Cl nic Universitari, Barcelona, Spain
| | - M. Matiello
- Cardiovascular Institute, Hospital Cl nic Universitari, Barcelona, Spain
| | - F. Verbal
- Cardiovascular Institute, Hospital Cl nic Universitari, Barcelona, Spain
| | - J. Brugada
- Cardiovascular Institute, Hospital Cl nic Universitari, Barcelona, Spain
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Tamborero D, Mont Girbau J, Molina I, De Caralt T, Nava S, Macias A, Diaz-Infante E, Brugada J. 281 Incidence of asymptomatic pulmonary vein stenosis in atrial fibrillation ablation. Segmental ostial ablation versus pulmonary veins encircling. Europace 2005. [DOI: 10.1016/eupace/7.supplement_1.62-b] [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: 10/19/2022] Open
Affiliation(s)
- D. Tamborero
- Cardiovascular Institute, Hospital Cl nic Universitari, Barcelona, Spain
| | - J.L. Mont Girbau
- IMCV Hospital Clinic, Department of Cardiology, Barcelona, Spain
| | - I. Molina
- Cardiovascular Institute, Hospital Cl nic Universitari, Barcelona, Spain
| | - T.M. De Caralt
- Cardiovascular Institute, Hospital Cl nic Universitari, Barcelona, Spain
| | - S. Nava
- Cardiovascular Institute, Hospital Cl nic Universitari, Barcelona, Spain
| | - A. Macias
- Cardiovascular Institute, Hospital Cl nic Universitari, Barcelona, Spain
| | - E. Diaz-Infante
- Cardiovascular Institute, Hospital Cl nic Universitari, Barcelona, Spain
| | - J. Brugada
- Cardiovascular Institute, Hospital Cl nic Universitari, Barcelona, Spain
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Maceira A, Barba J, Cosin-Sales J, Macias A, Berenguel A, Herreros J, Rabago G. Preservation of left and right atrial function with the bicaval technique in heart transplantation. J Heart Lung Transplant 2002. [DOI: 10.1016/s1053-2498(01)00551-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Lopez V, Macias A, Riera A, Yanez M, Piacentini RD. Molecular treatment of elastic and double charge-exchange He2+-He collisions. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0022-3700/11/16/016] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Krizek BA, Prost V, Macias A. AINTEGUMENTA promotes petal identity and acts as a negative regulator of AGAMOUS. Plant Cell 2000; 12:1357-66. [PMID: 10948255 PMCID: PMC149108 DOI: 10.1105/tpc.12.8.1357] [Citation(s) in RCA: 68] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2000] [Accepted: 06/02/2000] [Indexed: 05/19/2023]
Abstract
The Arabidopsis AINTEGUMENTA (ANT) gene has been shown previously to be involved in ovule development and in the initiation and growth of floral organs. Here, we show that ANT acts in additional processes during flower development, including repression of AGAMOUS (AG) in second whorl cells, promotion of petal epidermal cell identity, and gynoecium development. Analyses of ap2-1 ant-6 double mutants reveal that ANT acts redundantly with AP2 to repress AG in second whorl cells. The abaxial surface of ant petals contains features such as stomata and elongated, interdigitated cells that are not present on wild-type petals. The loss of petal identity in these second whorl cells does not result from ectopic AG expression, suggesting that ANT acts in a pathway promoting petal cell identity that is independent of its role in repression of AG. These data suggest that ANT may function as a class A gene.
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Affiliation(s)
- B A Krizek
- Department of Biological Sciences, University of South Carolina, Columbia, South Carolina 29208, USA.
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Macias A, Arce S, Leon J, Mustelier G, Bombino G, Domarco A, Perez R, Lage A. Novel cross-reactive anti-idiotype antibodies with properties close to the human intravenous immunoglobulin (IVIg). Hybridoma (Larchmt) 1999; 18:263-72. [PMID: 10475241 DOI: 10.1089/027245799315925] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [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: 11/12/2022]
Abstract
The most important link between the immune network theory and clinically useful therapies so far is the use of human intravenous immunoglobulin (IVIg) in the treatment of autoimmune diseases. Although still controversial, one of the main mechanisms that has been postulated for the in vivo effects of IVIg, is the selection of immune repertoires through idiotypic interactions. We describe here anti-idiotype IgG monoclonal antibodies (MAbs), which were obtained by immunization of syngeneic mice (Balb/c) with an anti-ganglioside antibody. These anti-idiotype MAbs show multiple idiotypic connections and share some of the properties of the IVIg pool. The antiidiotype (Ab2) MAbs B7 and 34B7 showed heterogeneous binding with the idiotypes of several anti-ganglioside antibodies, MAbs obtained from splenocytes of nonimmunized newborn mice, F(ab')2 fragments of IgG human myeloma proteins, and nonimmunoglobulin antigens. The recognition pattern of the B7 MAb to the idiotypes of human immunoglobulins was also studied using a phage display library obtained from the variable region genes of an asymptomatic AIDS patient and also F(ab')2 fragments obtained from an IVIg pool of healthy human donors. We also demonstrated that these MAbs produced some of the in vitro effects reported for the human IVIg pool, such as the inhibition of cell proliferation of human B and T cell lines and of normal human lymphocytes activated with different mitogens. Another striking property of the MAb B7 was its ability to induce a dose-dependent specific antibody T-cell response in vivo in syngeneic mice. Both anti-idiotype MAbs showed anti-metastatic effect in vivo when injected intravenously to mice inoculated with MB16-F10 melanoma cells. The antimetastatic effect of the antiidiotype MAbs was not observed in athymic mice inoculated with the same tumor. This kind of antibody can become an interesting tool for further exploration of the role of idiotypic network connections in the regulation of the immune system and to study the effects of interventions on network connectivity in experimental autoimmune disease, using a reagent better chemically defined than the IVIg pool.
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MESH Headings
- Animals
- Antibodies, Anti-Idiotypic/immunology
- Antibodies, Anti-Idiotypic/therapeutic use
- Antibodies, Monoclonal/immunology
- Antibodies, Monoclonal/therapeutic use
- Autoimmune Diseases/immunology
- Autoimmune Diseases/therapy
- B-Lymphocytes/cytology
- B-Lymphocytes/immunology
- Cell Division
- Cell Line
- Cross Reactions
- G(M2) Ganglioside/immunology
- Humans
- Immunoglobulin G/immunology
- Immunoglobulin G/therapeutic use
- Immunoglobulin Idiotypes/immunology
- Immunoglobulins, Intravenous/immunology
- In Vitro Techniques
- Melanoma, Experimental/immunology
- Melanoma, Experimental/secondary
- Melanoma, Experimental/therapy
- Mice
- Mice, Inbred C57BL
- Mice, Nude
- T-Lymphocytes/cytology
- T-Lymphocytes/immunology
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Affiliation(s)
- A Macias
- Department of Antibody Engineering, Center of Molecular Immunology, Havana, Cuba
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Macias A, Riera A. Criterion of maximum stability for the calculation of resonance energies. Application to the Stark effect. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0022-3700/14/6/008] [Citation(s) in RCA: 7] [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] [Indexed: 11/11/2022]
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de Pablos P, Martinez J, Aguilar J, Rodriguez F, Macias A. 2.P.109 Lack of effect of acute and chronic normalization of plasma growth hormone concentration on lipoprotein (a) levels in patients with acromegalia. Atherosclerosis 1997. [DOI: 10.1016/s0021-9150(97)88747-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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de Pablos P, Martinez J, Aguilar J, Rodriguez F, Murado P, Macias A. 2.P.108 Effects of losartan on blood pressure, microalbuminuria, insulin sensitivity and lipid profile in hypertensive type II diabetics with microalbuminuria. Atherosclerosis 1997. [DOI: 10.1016/s0021-9150(97)88745-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Castro JA, Romero J, García-Vázquez JA, Macias A, Sousa A, Englert U. Dichloro[5,8-dimethyl-1,12-di-2-pyrrolyl-2,5,8,11-tetraaza-1,11-dodecadiene-N2,N5,N8,N11]cadmium(II). Acta Crystallogr C 1994. [DOI: 10.1107/s0108270193007577] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Zhang L, Macias A, Isnin R, Lu T, Gokel GW, Kaifer AE. The complexation of ferrocene derivatives by a water-soluble calix[6]arene. ACTA ACUST UNITED AC 1994. [DOI: 10.1007/bf00708993] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Castro J, Romero J, Garcia-Vazquez J, Macias A, Sousa A, Englert U. Electrochemical synthesis of metal(II) complexes of schiff bases: the crystal structure of acetonitrile-bis{2-[(2-pyrrole)methylimino]-4,6-dimethylphenolato}zinc(II). Polyhedron 1993. [DOI: 10.1016/s0277-5387(00)84331-4] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Labisbal E, Garcia-Vázquez J, Gómez C, Macias A, Romero J, Sousa A, Englert U, Fenton D. The synthesis of zinc(II) complexes of 2-(2-mercaptophenyl)-iminophenol by electrochemical cleavage of a disulfide bond; the crystal structure of {(2, 2′-bipyridine)[2-(2-mercaptophenyl)iminophenoxy]}zinc(II). Inorganica Chim Acta 1993. [DOI: 10.1016/s0020-1693(00)82906-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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McAuliffe CA, Pritchard RG, Bermejo MR, Garcia-Vazquez A, Macias A, Sanmartín J, Romero J, Sousa A. Carbonatobis(1,10-phenanthroline)cobalt(III) perchlorate. Acta Crystallogr C 1992. [DOI: 10.1107/s0108270192002105] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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McAuliffe CA, Pritchard RG, Bermejo MR, Garcia-Vazquez A, Macias A, Sanmartín J, Romero J, Sousa A. Bis(2,2'-bipyridine)isocyanatocopper(II) perchlorate. Acta Crystallogr C 1992. [DOI: 10.1107/s010827019101449x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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Macias A, Casanova J, Morata G. Expression and regulation of the abd-A gene of Drosophila. Development 1990. [PMID: 1983117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
We have developed a specific polyclonal antibody that recognizes the protein products of the abdominal-A (abd-A) gene, a member of the bithorax complex of Drosophila. The normal expression domain extends from parasegments 7 to 13, in good correspondence with previous genetic and molecular results. However, while the anterior border of expression is precisely demarcated by a parasegmental boundary, the posterior border does not coincide with a lineage boundary. Within the normal domain, the expression of abd-A shows intrametameric modulation; the amount of product is higher in posterior compartments and in the most anterior cells of the anterior compartments and then gradually decreases. We have examined the effect on abd-A expression of a number of mutations, some mapping within and others outside the abd-A transcription unit. Those mapping to the transcription unit eliminate or severely reduce the amount of abd-A antigen, while those mapping outside produce an abnormal distribution of abd-A protein. Finally, we show that the abd-A gene is down-regulated in part of the Abdominal-B (Abd-B) domain, precisely in those regions where the Abd-B gene is expressed at high levels.
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Affiliation(s)
- A Macias
- Centro de Biología Molecular (CSIC-UAM), Universidad Autónoma, Madrid, Spain
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Busturia A, Vernos I, Macias A, Casanova J, Morata G. Different forms of Ultrabithorax proteins generated by alternative splicing are functionally equivalent. EMBO J 1990; 9:3551-5. [DOI: 10.1002/j.1460-2075.1990.tb07565.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Busturia A, Vernos I, Macias A, Casanova J, Morata G. Different forms of Ultrabithorax proteins generated by alternative splicing are functionally equivalent. EMBO J 1990. [PMID: 1976510 PMCID: PMC552105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
The Ubx gene of Drosophila normally produces several forms of Ubx proteins through alternative splicing of two microexons. We describe here two new viable Ubx mutations that show similar and almost wild-type adult phenotypes. Molecular characterization has shown that one of them, UbxMX17, is an inversion within the Ubx transcription unit including one of the microexons involved in alternative splicing. This results in mutant flies possessing a very abnormal array of Ubx proteins, probably including spliced forms not present in wild-type flies. Yet these protein products successfully substitute for the normal ones and allow virtually normal Ubx function. We argue that the different Ubx proteins are developmentally equivalent and that the slight mutant phenotype observed in UbxMX17 flies is not due to the abnormal set of Ubx proteins but to a breakpoint in a cis-regulatory region.
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Castro J, Castineiras A, Duran ML, Garcia-Vazquez JA, Macias A, Romero J, Sousa A. Direct electrochemical synthesis and crystal structure of the Zinc(II) Carbamato Complex {[N-methyl-N?-[(2-pyrrolyl)-methylene]ethylenediamine][N-methyl-N-[2-[(2-pyrrolato)-methyleneamino]ethyl]carbamato]}zinc(II). Z Anorg Allg Chem 1990. [DOI: 10.1002/zaac.19905860126] [Citation(s) in RCA: 9] [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] [Indexed: 11/09/2022]
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Magnusson I, Rosen AV, Nilsson R, Macias A, Perez R, Skoog L. Receptors for epidermal growth factor and sex steroid hormones in human colorectal carcinomas. Anticancer Res 1989; 9:299-301. [PMID: 2751256] [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: 01/02/2023]
Abstract
Iodinated epidermal growth factor was used to identify its specific receptor in 32 human colorectal carcinomas. The receptor was found in 25% of the tumors with values between 6.9 - 104.0 fmoles/mg DNA. Receptors for estrogen and progesterone were detected in 45 and 25% of the tumors respectively. No correlation was observed between short term survival and content of receptors for sex steroid hormones. Four of the 8 patients with detectable levels of epidermal growth factor receptor had experienced relapse.
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Affiliation(s)
- I Magnusson
- Department of Surgery, Södersjukhuset, Stockholm, Sweden
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