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Tébar D, Carrillo X, García Del Blanco B, Gómez-Hospital JA, Nombela L, Molina E, Galeote G, Vilalta V, Serra-García V, Carol GM, Jiménez-Valero S, Fernandez-Nofrerias E, Calabuig-Goena Á, Jurado-Román A, Sánchez-Recalde Á, Velasco MF, Bosca L, Moreno R. Experience with the ACURATE neo and neo2 transcatheter aortic valves in Spain. The PRECISA (PRospective Evaluation Complementing Investigation with ACURATE devices) registry. Catheter Cardiovasc Interv 2024; 103:1015-1022. [PMID: 38577931 DOI: 10.1002/ccd.31032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 02/29/2024] [Accepted: 03/24/2024] [Indexed: 04/06/2024]
Abstract
BACKGROUND Previous studies have documented a high rate of implantation success with the ACURATE neo2 valve, as well as a reduction in paravalvular leak (PVL) compared to its predecessor, the ACURATE neo. However, there are no studies that have reviewed and compared the long-term clinical and hemodynamic outcomes of these patients. AIMS This study aimed to evaluate the results of the ACURATE neo transcatheter aortic valve in a real-world context, and to compare the results of the outcomes of both generations of this device (ACURATE neo and ACURATE neo2), with a specific focus on procedural success, safety, and long-term effectiveness. METHODS A prospective study including all consecutive patients treated with the ACURATE neo device in seven hospitals was conducted (Clinical Trials Identification Number: NCT03846557). The primary endpoint consisted of a composite of adverse events, including mortality, aortic insufficiency, and other procedural complications. As the second-generation device (ACURATE neo2) replaced the ACURATE neo during the study period, hemodynamic and clinical results before admission, at 30 days, and at 1 year of follow-up were compared between the two generations. RESULTS A total of 296 patients underwent transcatheter aortic valve implantation with the ACURATE device, with 178 patients receiving the ACURATE neo and 118 patients receiving the ACURATE neo2. In the overall population, the absence of device success occurred in 14.5%. The primary reason for the absence of device success was the presence of para-valvular regurgitation ≥ 2. There were no instances of coronary occlusions, valve embolization, annulus rupture, or procedural deaths. ACURATE neo2 was associated with a significantly higher device success rate (91.7% vs. 82%, p = 0.04), primarily due to a significantly lower rate of para-valvular regurgitation, which remained significant at 1 year. CONCLUSION The use of ACURATE neo and neo2 transcatheter aortic valves is associated with satisfactory clinical results and an extremely low rate of complications. The ACURATE neo2 enables a significantly higher device success rate, primarily attributed to a significant reduction in the rate of PVL.
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Affiliation(s)
- Daniel Tébar
- Servicio de Cardiología, Hospital Universitario La Paz, IdiPAZ, Spain
| | | | | | | | | | | | - Guillermo Galeote
- Servicio de Cardiología, Hospital Universitario La Paz, IdiPAZ, Spain
| | | | | | | | | | | | | | | | | | | | - Lisardo Bosca
- CIBERCV, Madrid, Spain
- Instituto de Investigaciones Biomédicas Sols-Morreale (CSIC-UAM)
| | - Raúl Moreno
- Servicio de Cardiología, Hospital Universitario La Paz, IdiPAZ, Spain
- Universidad Autónoma de Madrid, Madrid, Spain
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2
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Chakraborty A, Miller W, Huai W, Biswas T, Mohan Mandal S, Bosca L, Ghosh G, Hazra T. A glycolytic metabolite restores DNA repair activity of polynucleotide kinase 3'-phosphatase in polyglutamine (PolyQ) diseases. bioRxiv 2023:2023.10.26.564220. [PMID: 37961108 PMCID: PMC10634858 DOI: 10.1101/2023.10.26.564220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
We previously reported that the loss of activity of an essential DNA repair enzyme, polynucleotide kinase 3'-phosphatase (PNKP), resulted in accumulation of double strand breaks (DSB) in patient's brain genome in Huntington's disease (HD) and Spinocerebellar ataxia type 3 (SCA3). Here we document that PNKP interacts with the nuclear isoform of phosphofructokinase fructose-2,6-bisphosphatase 3 (PFKFB3), which converts fructose-6-phosphate (F6P) into fructose-2,6-bisphosphate (F2,6BP), a potent allosteric modulator of glycolysis. Depletion of PFKFB3 markedly abrogates PNKP activity, thereby affecting PNKP mediated transcription-coupled non-homologous end joining (TC-NHEJ). Both PFKFB3 and F2,6BP levels are significantly lower in the nuclear extracts of HD and SCA3 patients' brains. Exogenous F2,6BP restored PNKP activity in the brain nuclear extracts of those samples. Moreover, delivery of F2,6BP into HD mouse striata-derived neuronal cells restored PNKP activity, transcribed genome integrity and cellular viability. We thus postulate that F2,6BP serves in vivo as a cofactor for proper functionality of PNKP and thereby of brain health. Our results thus provide a compelling rationale for exploring therapeutic use of F2,6BP and related compounds for treating polyQ diseases.
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Affiliation(s)
- Anirban Chakraborty
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, 77555, USA
| | - Wyatt Miller
- Department of Chemistry and Biochemistry, University of California San Diego, LA Jolla, California 92093, USA
| | - Weihan Huai
- Department of Chemistry and Biochemistry, University of California San Diego, LA Jolla, California 92093, USA
| | - Tapan Biswas
- Department of Chemistry and Biochemistry, University of California San Diego, LA Jolla, California 92093, USA
| | - Santi Mohan Mandal
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, 77555, USA
- $ Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Lisardo Bosca
- Instituto de Investigaciones Biomédicas Alberto Sols (CSIC-UAM) Arturo Duperier 4 28029 Madrid
| | - Gourisankar Ghosh
- Department of Chemistry and Biochemistry, University of California San Diego, LA Jolla, California 92093, USA
| | - Tapas Hazra
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, 77555, USA
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3
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Hamdy NM, Bosca L, Singh SM, Reddy Bonam S, Kiss I, Kumar DP, Banerjee A. Editorial: Women in gastrointestinal cancers, volume II: 2022. Front Oncol 2023; 13:1192814. [PMID: 37265801 PMCID: PMC10231325 DOI: 10.3389/fonc.2023.1192814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 03/29/2023] [Indexed: 06/03/2023] Open
Affiliation(s)
- Nadia M. Hamdy
- Department of Biochemistry, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt
| | - Lisardo Bosca
- Alberto Sols Biomedical Research Institute, Faculty of Medicine, Autonomous University of Madrid, Madrid, Spain
| | | | - Srinivasa Reddy Bonam
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, United States
| | - Igor Kiss
- Department of Comprehensive Cancer Care, Masaryk Memorial Cancer Institute and Faculty of Medicine, Masaryk University, Brno, Czechia
| | - Divya P. Kumar
- Department of Biochemistry, JSS Medical College, JSS Academy of Higher Education and Research, Mysore, India
| | - Aditi Banerjee
- Department of Pediatrics, University of Maryland, School of Medicine, Baltimore, MD, United States
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4
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Tamayo M, Martín-Nunes L, Piedras MJ, Martin-Calvo M, Martí-Morente D, Gil-Fernández M, Gómez-Hurtado N, Moro MÁ, Bosca L, Fernández-Velasco M, Delgado C. The Aryl Hydrocarbon Receptor Ligand FICZ Improves Left Ventricular Remodeling and Cardiac Function at the Onset of Pressure Overload-Induced Heart Failure in Mice. Int J Mol Sci 2022; 23:ijms23105403. [PMID: 35628213 PMCID: PMC9141655 DOI: 10.3390/ijms23105403] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 05/06/2022] [Accepted: 05/10/2022] [Indexed: 02/07/2023] Open
Abstract
Adverse ventricular remodeling is the heart's response to damaging stimuli and is linked to heart failure and poor prognosis. Formyl-indolo [3,2-b] carbazole (FICZ) is an endogenous ligand for the aryl hydrocarbon receptor (AhR), through which it exerts pleiotropic effects including protection against inflammation, fibrosis, and oxidative stress. We evaluated the effect of AhR activation by FICZ on the adverse ventricular remodeling that occurs in the early phase of pressure overload in the murine heart induced by transverse aortic constriction (TAC). Cardiac structure and function were evaluated by cardiac magnetic resonance imaging (CMRI) before and 3 days after Sham or TAC surgery in mice treated with FICZ or with vehicle, and cardiac tissue was used for biochemical studies. CMRI analysis revealed that FICZ improved cardiac function and attenuated cardiac hypertrophy. These beneficial effects involved the inhibition of the hypertrophic calcineurin/NFAT pathway, transcriptional reduction in pro-fibrotic genes, and antioxidant effects mediated by the NRF2/NQO1 pathway. Overall, our findings provide new insight into the role of cardiac AhR signaling in the injured heart.
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Affiliation(s)
- María Tamayo
- Instituto de Investigaciones Biomédicas “Alberto Sols” (CSIC-UAM), CIBER de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain; (M.T.); (L.M.-N.); (M.J.P.); (M.M.-C.); (D.M.-M.); (M.G.-F.); (N.G.-H.); (L.B.); (M.F.-V.)
| | - Laura Martín-Nunes
- Instituto de Investigaciones Biomédicas “Alberto Sols” (CSIC-UAM), CIBER de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain; (M.T.); (L.M.-N.); (M.J.P.); (M.M.-C.); (D.M.-M.); (M.G.-F.); (N.G.-H.); (L.B.); (M.F.-V.)
| | - María José Piedras
- Instituto de Investigaciones Biomédicas “Alberto Sols” (CSIC-UAM), CIBER de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain; (M.T.); (L.M.-N.); (M.J.P.); (M.M.-C.); (D.M.-M.); (M.G.-F.); (N.G.-H.); (L.B.); (M.F.-V.)
- Facultad de Medicina, Universidad Francisco de Vitoria (UFV), 28223 Madrid, Spain
| | - María Martin-Calvo
- Instituto de Investigaciones Biomédicas “Alberto Sols” (CSIC-UAM), CIBER de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain; (M.T.); (L.M.-N.); (M.J.P.); (M.M.-C.); (D.M.-M.); (M.G.-F.); (N.G.-H.); (L.B.); (M.F.-V.)
| | - Daniel Martí-Morente
- Instituto de Investigaciones Biomédicas “Alberto Sols” (CSIC-UAM), CIBER de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain; (M.T.); (L.M.-N.); (M.J.P.); (M.M.-C.); (D.M.-M.); (M.G.-F.); (N.G.-H.); (L.B.); (M.F.-V.)
| | - Marta Gil-Fernández
- Instituto de Investigaciones Biomédicas “Alberto Sols” (CSIC-UAM), CIBER de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain; (M.T.); (L.M.-N.); (M.J.P.); (M.M.-C.); (D.M.-M.); (M.G.-F.); (N.G.-H.); (L.B.); (M.F.-V.)
- Innate Immune Response Group, IdiPAZ, La Paz University Hospital, 28046 Madrid, Spain
| | - Nieves Gómez-Hurtado
- Instituto de Investigaciones Biomédicas “Alberto Sols” (CSIC-UAM), CIBER de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain; (M.T.); (L.M.-N.); (M.J.P.); (M.M.-C.); (D.M.-M.); (M.G.-F.); (N.G.-H.); (L.B.); (M.F.-V.)
| | - María Ángeles Moro
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Melchor Fernández Almagro 3, 28029 Madrid, Spain;
| | - Lisardo Bosca
- Instituto de Investigaciones Biomédicas “Alberto Sols” (CSIC-UAM), CIBER de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain; (M.T.); (L.M.-N.); (M.J.P.); (M.M.-C.); (D.M.-M.); (M.G.-F.); (N.G.-H.); (L.B.); (M.F.-V.)
| | - María Fernández-Velasco
- Instituto de Investigaciones Biomédicas “Alberto Sols” (CSIC-UAM), CIBER de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain; (M.T.); (L.M.-N.); (M.J.P.); (M.M.-C.); (D.M.-M.); (M.G.-F.); (N.G.-H.); (L.B.); (M.F.-V.)
- Innate Immune Response Group, IdiPAZ, La Paz University Hospital, 28046 Madrid, Spain
| | - Carmen Delgado
- Instituto de Investigaciones Biomédicas “Alberto Sols” (CSIC-UAM), CIBER de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain; (M.T.); (L.M.-N.); (M.J.P.); (M.M.-C.); (D.M.-M.); (M.G.-F.); (N.G.-H.); (L.B.); (M.F.-V.)
- Correspondence:
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5
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Val-Blasco A, Prieto P, Jaen RI, Gil-Fernandez M, Pajares M, Domenech N, Jorge I, Vazquez J, Bueno-Sen A, Ruiz-Hurtado G, Crespo-Leiro MG, Cuadrado A, Delgado C, Bosca L, Fernandez-Velasco M. Specialized pro-resolving mediators prevents cardiac dysfunction by modulating Ca2+ handling and NRF2 axis. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.3207] [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: 11/12/2022] Open
Abstract
Abstract
Background and purpose
Myocarditis is a severe inflammatory heart disease and a leading cause of sudden death in young adults; but currently no specific treatment is available. Lipoxins and their derivatives promote the resolution of inflammation contributing to recover tissue homeostasis; but their role in cardiac inflammation is poorly understood.
Methods and results
BML-111, a stable lipoxin A4 receptor agonist, protects against cardiac dysfunction in a murine model of experimental autoimmune myocarditis (EAM) by preventing Ca2+ mishandling. Cardiac proteomic analysis revealed an enhanced cardiac oxidative profile in EAM-induced mice with reduced activation of NRF2, a master antioxidant transcription factor. In vitro analysis showed that 15-epi-lipoxin A4 increased systolic Ca2+ release and sarcoplasmic reticulum (SR)-Ca2+ load in cardiomyocytes isolated from wild-type mice and augmented the rate of SR-Ca2+ uptake by SERCA2a, but failed to induce any functional change in cells from Nrf2−/− mice. BML-111 increased SERCA2a cardiac expression in wild-type mice, and the transcriptional activity of Nrf2 determined SERCA2a expression in human ventricular cells. Human myocarditis-positive myocardium showed a reduced expression of both ATP2A2 (SERCA2a) and NF2L2 (NRF2).
Conclusions
Our results demonstrated new cardioprotective mechanisms of pro-resolving lipid mediators that may emerge as innovative treatments for myocarditis.
Funding Acknowledgement
Type of funding sources: Public grant(s) – National budget only. Main funding source(s): ISCIII [PI17/01344]), Sociedad Española de Cardiología: Proyecto Traslacional 2019Fondo Europeo de Desarrollo Regional (FEDER), FSE, and CIBER-CV, a network funded by ISCIII
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Affiliation(s)
- A Val-Blasco
- Instituto de Investigacion Hospital Universitario La PAZ, IdiPAZ, Madrid, Spain
| | - P Prieto
- Complutense University of Madrid, Pharmacology, Pharmacy Faculty, Madrid, Spain
| | - R I Jaen
- Instituto de Investigaciones Biomedicas Alberto Sols, Madrid, Spain
| | - M Gil-Fernandez
- Instituto de Investigacion Hospital Universitario La PAZ, IdiPAZ, Madrid, Spain
| | - M Pajares
- Instituto de Investigaciones Biomedicas Alberto Sols, Madrid, Spain
| | - N Domenech
- Cardiology Practice, Instituto de Investigaciόn Biomédica de A Coruña (INIBIC), Complexo Hospitalario Universitario de A, Coruña, A, Spain
| | - I Jorge
- National Centre for Cardiovascular Research (CNIC), Madrid, Spain
| | - J Vazquez
- National Centre for Cardiovascular Research (CNIC), Madrid, Spain
| | - A Bueno-Sen
- Instituto de Investigacion Hospital Universitario La PAZ, IdiPAZ, Madrid, Spain
| | - G Ruiz-Hurtado
- University Hospital 12 de Octubre, Instituto de Investigaciόn i+12 Hospital Universitario 12 de Octubre, Madrid, Spain
| | - M G Crespo-Leiro
- Cardiology Practice, Instituto de Investigaciόn Biomédica de A Coruña (INIBIC), Complexo Hospitalario Universitario de A, Coruña, A, Spain
| | - A Cuadrado
- Instituto de Investigaciones Biomedicas Alberto Sols, Madrid, Spain
| | - C Delgado
- Instituto de Investigaciones Biomedicas Alberto Sols, Madrid, Spain
| | - L Bosca
- Instituto de Investigaciones Biomedicas Alberto Sols, Madrid, Spain
| | - M Fernandez-Velasco
- Instituto de Investigacion Hospital Universitario La PAZ, IdiPAZ, Madrid, Spain
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6
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Jimenez PL, Tabraue C, Mirecki M, De La Rosa J, López-Blanco F, Bosca L, Fernandez L, Castrillo A. OC-0155 Lxr Signaling Regulates Macrophage Survival and Phenotype Polarization Response To Ionizing Radiation. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)30575-4] [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: 10/26/2022]
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7
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Ramón-Vázquez A, de la Rosa JV, Tabraue C, Lopez F, Díaz-Chico BN, Bosca L, Tontonoz P, Alemany S, Castrillo A. Common and Differential Transcriptional Actions of Nuclear Receptors Liver X Receptors α and β in Macrophages. Mol Cell Biol 2019; 39:e00376-18. [PMID: 30602495 PMCID: PMC6379585 DOI: 10.1128/mcb.00376-18] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 08/29/2018] [Accepted: 12/07/2018] [Indexed: 02/07/2023] Open
Abstract
The liver X receptors α and β (LXRα and LXRβ) are oxysterol-activated transcription factors that coordinately regulate gene expression that is important for cholesterol and fatty acid metabolism. In addition to their roles in lipid metabolism, LXRs participate in the transcriptional regulation of macrophage activation and are considered potent regulators of inflammation. LXRs are highly similar, and despite notable exceptions, most of their reported functions are substantially overlapping. However, their individual genomic distribution and transcriptional capacities have not been characterized. Here, we report a macrophage cellular model expressing equivalent levels of tagged LXRs. Analysis of data from chromatin immunoprecipitation coupled with deep sequencing revealed that LXRα and LXRβ occupy both overlapping and exclusive genomic regulatory sites of target genes and also control the transcription of a receptor-exclusive set of genes. Analysis of genomic H3K27 acetylation and mRNA transcriptional changes in response to synthetic agonist or antagonist treatments revealed a putative mode of pharmacologically independent regulation of transcription. Integration of microarray and sequencing data enabled the description of three possible mechanisms of LXR transcriptional activation. Together, these results contribute to our understanding of the common and differential genomic actions of LXRs and their impact on biological processes in macrophages.
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Affiliation(s)
- Ana Ramón-Vázquez
- Instituto de Investigaciones Biomédicas Alberto Sols, Consejo Superior de Investigaciones Científicas (CSIC)-Universidad Autónoma de Madrid, Madrid, Spain
- Unidad de Biomedicina (Unidad Asociada al CSIC), Instituto Universitario de Investigaciones Biomédicas y Sanitarias, Grupo de Investigación Medio Ambiente y Salud, Universidad de Las Palmas de Gran Canaria, Las Palmas, Spain
| | - Juan Vladimir de la Rosa
- Instituto de Investigaciones Biomédicas Alberto Sols, Consejo Superior de Investigaciones Científicas (CSIC)-Universidad Autónoma de Madrid, Madrid, Spain
- Unidad de Biomedicina (Unidad Asociada al CSIC), Instituto Universitario de Investigaciones Biomédicas y Sanitarias, Grupo de Investigación Medio Ambiente y Salud, Universidad de Las Palmas de Gran Canaria, Las Palmas, Spain
| | - Carlos Tabraue
- Unidad de Biomedicina (Unidad Asociada al CSIC), Instituto Universitario de Investigaciones Biomédicas y Sanitarias, Grupo de Investigación Medio Ambiente y Salud, Universidad de Las Palmas de Gran Canaria, Las Palmas, Spain
| | - Felix Lopez
- Unidad de Biomedicina (Unidad Asociada al CSIC), Instituto Universitario de Investigaciones Biomédicas y Sanitarias, Grupo de Investigación Medio Ambiente y Salud, Universidad de Las Palmas de Gran Canaria, Las Palmas, Spain
| | - Bonifacio Nicolas Díaz-Chico
- Unidad de Biomedicina (Unidad Asociada al CSIC), Instituto Universitario de Investigaciones Biomédicas y Sanitarias, Grupo de Investigación Medio Ambiente y Salud, Universidad de Las Palmas de Gran Canaria, Las Palmas, Spain
| | - Lisardo Bosca
- Instituto de Investigaciones Biomédicas Alberto Sols, Consejo Superior de Investigaciones Científicas (CSIC)-Universidad Autónoma de Madrid, Madrid, Spain
- Unidad de Biomedicina (Unidad Asociada al CSIC), Instituto Universitario de Investigaciones Biomédicas y Sanitarias, Grupo de Investigación Medio Ambiente y Salud, Universidad de Las Palmas de Gran Canaria, Las Palmas, Spain
| | - Peter Tontonoz
- Department of Pathology and Laboratory Medicine, University of California, Los Angeles, Los Angeles, California, USA
| | - Susana Alemany
- Instituto de Investigaciones Biomédicas Alberto Sols, Consejo Superior de Investigaciones Científicas (CSIC)-Universidad Autónoma de Madrid, Madrid, Spain
- Unidad de Biomedicina (Unidad Asociada al CSIC), Instituto Universitario de Investigaciones Biomédicas y Sanitarias, Grupo de Investigación Medio Ambiente y Salud, Universidad de Las Palmas de Gran Canaria, Las Palmas, Spain
| | - Antonio Castrillo
- Instituto de Investigaciones Biomédicas Alberto Sols, Consejo Superior de Investigaciones Científicas (CSIC)-Universidad Autónoma de Madrid, Madrid, Spain
- Unidad de Biomedicina (Unidad Asociada al CSIC), Instituto Universitario de Investigaciones Biomédicas y Sanitarias, Grupo de Investigación Medio Ambiente y Salud, Universidad de Las Palmas de Gran Canaria, Las Palmas, Spain
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Fernandez-Velasco M, Val-Blasco A, Delgado C, Ruiz-Hurtado G, Tamayo M, Navarro-Garcia JA, Terron V, Zaragoza C, Gil-Fernandez M, Bosca L, Prieto P. P5700Pro-resolving mediators prevent myocarditis-induced calcium mishandling and cardiac dysfunction: involvement of nrf2. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p5700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
| | - A Val-Blasco
- Instituto de Investigacion Hospital La Paz, IDIPAZ, Madrid, Spain
| | - C Delgado
- Instituto de Investigaciones Biomedicas Alberto Sols, Madrid, Spain
| | - G Ruiz-Hurtado
- University Hospital 12 de Octubre, Instituto de Investigaciόn i+12 Hospital Universitario 12 de Octubre, Madrid, Spain
| | - M Tamayo
- Instituto de Investigaciones Biomedicas Alberto Sols, Madrid, Spain
| | - J A Navarro-Garcia
- University Hospital 12 de Octubre, Instituto de Investigaciόn i+12 Hospital Universitario 12 de Octubre, Madrid, Spain
| | - V Terron
- Instituto de Investigaciones Biomedicas Alberto Sols, Madrid, Spain
| | - C Zaragoza
- University Francisco de Vitoria, Madrid, Spain
| | - M Gil-Fernandez
- Instituto de Investigacion Hospital La Paz, IDIPAZ, Madrid, Spain
| | - L Bosca
- Instituto de Investigaciones Biomedicas Alberto Sols, Madrid, Spain
| | - P Prieto
- Instituto de Investigaciones Biomedicas Alberto Sols, Madrid, Spain
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Gonzalez-Nicolas M, Humanes B, Camaño S, Garcia-Piqueras P, Cova M, Martin-Lozoya J, Del Baño L, Lara JM, Bosca L, Tejedor A, Lazaro A. FP229EPITHELIAL-MESENCHYMAL TRANSITION MAY BE BLOCKED BEFORE ACUTE KIDNEY INJURY EXPANSION. Nephrol Dial Transplant 2018. [DOI: 10.1093/ndt/gfy104.fp229] [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: 11/12/2022] Open
Affiliation(s)
- Mariangeles Gonzalez-Nicolas
- Laboratory of Renal Physiopathology, Department of Nephrology, Instituto de Investigacion Sanitaria Gregorio Marañon, Madrid, Spain
| | - Blanca Humanes
- Laboratory of Renal Physiopathology, Department of Nephrology, Instituto de Investigacion Sanitaria Gregorio Marañon, Madrid, Spain
| | - Sonia Camaño
- Laboratory of Renal Physiopathology, Department of Nephrology, Instituto de Investigacion Sanitaria Gregorio Marañon, Madrid, Spain
| | | | - Miguel Cova
- School of Medicine, Universidad Complutense Madrid, Madrid, Spain
| | | | - Laura Del Baño
- School of Medicine, Universidad Complutense Madrid, Madrid, Spain
| | - Jose Manuel Lara
- Department of Pathology, Hospital General Universitario Gregorio Marañon, Madrid, Spain
| | - Lisardo Bosca
- Instituto de Investigaciones Biomedicas "Alberto Sols", CSIC-UAM, Madrid, Spain
| | - Alberto Tejedor
- Department of Medicine, School of Medicine, Universidad Complutense Madrid, Madrid, Spain
- Laboratory of Renal Physiopathology, Department of Nephrology, Instituto de Investigacion Sanitaria Gregorio Marañon, Madrid, Spain
| | - Alberto Lazaro
- Department of Physiology, School of Medicine, Universidad Complutense Madrid, Madrid, Spain
- Laboratory of Renal Physiopathology, Department of Nephrology, Instituto de Investigacion Sanitaria Gregorio Marañon, Madrid, Spain
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Val-Blasco A, Navarro-Garcia A, Tamayo M, Piedras M, Prieto P, Delgado C, Ruiz-Hurtado G, Terron V, Mesa J, Blazquez J, Bosca L, Fernandez-Velasco M. P3492The deficiency of NOD1 improves beta-adrenergic regulation of Ca2+ handling in experimental heart failure. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p3492] [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: 11/14/2022] Open
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11
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Peraza DA, Mojena M, de la Cruz A, Gonzalez T, Bosca L, Galmarini CM, Valenzuela C. Trabectedin Re-Educates Resting Peritoneal Macrophages into M1 Subtype. Biophys J 2017. [DOI: 10.1016/j.bpj.2016.11.2191] [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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12
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Gonzalez-Ramos S, Prieto P, Benito G, Terron V, Bosca L, Fernandez-Velasco M. P727Nucleotide-binding oligomerization domain-containing protein 1-signaling is upregulated in hearts from type 2 diabetic mice. Cardiovasc Res 2014. [DOI: 10.1093/cvr/cvu098.148] [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: 11/14/2022] Open
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13
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Tahara N, Mukherjee J, de Haas HJ, Petrov AD, Tawakol A, Haider N, Tahara A, Constantinescu CC, Zhou J, Boersma HH, Imaizumi T, Nakano M, Finn A, Fayad Z, Virmani R, Fuster V, Bosca L, Narula J. 2-deoxy-2-[18F]fluoro-D-mannose positron emission tomography imaging in atherosclerosis. Nat Med 2014; 20:215-9. [PMID: 24412923 DOI: 10.1038/nm.3437] [Citation(s) in RCA: 117] [Impact Index Per Article: 11.7] [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] [Received: 01/08/2013] [Accepted: 04/17/2013] [Indexed: 02/07/2023]
Abstract
Progressive inflammation in atherosclerotic plaques is associated with increasing risk of plaque rupture. Molecular imaging of activated macrophages with 2-deoxy-2-[(18)F]fluoro-D-glucose ([(18)F]FDG) has been proposed for identification of patients at higher risk for acute vascular events. Because mannose is an isomer of glucose that is taken up by macrophages through glucose transporters and because mannose receptors are expressed on a subset of the macrophage population in high-risk plaques, we applied (18)F-labeled mannose (2-deoxy-2-[(18)F]fluoro-D-mannose, [(18)F]FDM) for targeting of plaque inflammation. Here, we describe comparable uptake of [(18)F]FDM and [(18)F]FDG in atherosclerotic lesions in a rabbit model; [(18)F]FDM uptake was proportional to the plaque macrophage population. Our FDM competition studies in cultured cells with 2-deoxy-2-[(14)C]carbon-D-glucose ([(14)C]2DG) support at least 35% higher [(18)F]FDM uptake by macrophages in cell experiments. We also demonstrate that FDM restricts binding of anti-mannose receptor antibody to macrophages by approximately 35% and that mannose receptor targeting may provide an additional avenue for imaging of plaque inflammation.
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Affiliation(s)
| | | | - Hans J de Haas
- 1] Icahn School of Medicine at Mount Sinai, New York, New York, USA. [2] University Medical Center Groningen, University of Groningen, Groningen, The Netherlands. [3]
| | - Artiom D Petrov
- Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Ahmed Tawakol
- Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Nezam Haider
- Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | | | | | | | - Hendrikus H Boersma
- University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | | | | | - Aloke Finn
- Emory University School of Medicine, Atlanta, Georgia, USA
| | - Zahi Fayad
- Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | | | - Valentin Fuster
- 1] Icahn School of Medicine at Mount Sinai, New York, New York, USA. [2] Centro Nacional de Investigaciones Cardiovasculares Carlos III, Madrid, Spain
| | - Lisardo Bosca
- Instituto de Investigaciones Biomédicas Alberto Sols (Centro Mixto Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid), Madrid, Spain
| | - Jagat Narula
- Icahn School of Medicine at Mount Sinai, New York, New York, USA
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Ledo F, Artaiz I, Zazpe A, Terron V, Bosca L, Lucero M. 870 F10503LO1, a Potential New Treatment for Melanoma – Preclinical Efficacy. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)71503-4] [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: 10/28/2022]
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15
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Bosca L, Través P, Pimentel-Santillana M, de Atauri P, Marin S, Cascante M. Metabolomic analysis of macrophage activation and relevance of the cross-talk between energetic metabolism and polarized gene expression (172.12). The Journal of Immunology 2012. [DOI: 10.4049/jimmunol.188.supp.172.12] [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] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Abstract
Immune activation rapidly and substantially enhances metabolic outputs. Macrophage activation is followed by rapid changes in nutrient flux, which also seems to be necessary for immune activation, indicating that signals produced by immune cells might directly regulate their metabolism. Macrophages respond to a variety of extracellular stimuli developing patterns of gene expression that also encompass metabolic changes linked to the activation programs and that are not fully understood. Macrophages can be activated to two opposite end-points: M1-polarization accomplished by pro-inflammatory stimuli, and M2-polarization. The study of how energetic and redox metabolism of macrophages varies in accordance with recruitment and activation (M1, M2 or mixed combinations) and how these conditions are required for the specific functions of the macrophage (oxidative burst, phagocytosis, migration and infiltration, etc) are relevant to protect organ activity and to restrict the involvement of macrophages in chronic inflammation. We have studied the metabolic profile associated with relevant activation pathways using a [1,2-<13>C]glucose tracer-based metabolomic approach and bioinformatic tools to analyze changes in isotopomer distribution and changes in main energetic metabolites under M1/M2 conditions. Our data show the existence of specific metabolic signatures depending on the activation pattern elicited by the macrophages.
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Affiliation(s)
- Lisardo Bosca
- 1Insituto de Investigaciones Biomédicas (CSIC-UAM), Consejo Superior de Investigaciones Científicas (CSIC-UAM), Madrid, Spain
| | - Paqui Través
- 1Insituto de Investigaciones Biomédicas (CSIC-UAM), Consejo Superior de Investigaciones Científicas (CSIC-UAM), Madrid, Spain
| | - María Pimentel-Santillana
- 1Insituto de Investigaciones Biomédicas (CSIC-UAM), Consejo Superior de Investigaciones Científicas (CSIC-UAM), Madrid, Spain
| | - Pedro de Atauri
- 2Department of Biochemistry and Molecular Biology, Faculty of Biology, Universitat de Barcelona, Barcelona, Spain
| | - Silvia Marin
- 2Department of Biochemistry and Molecular Biology, Faculty of Biology, Universitat de Barcelona, Barcelona, Spain
| | - Marta Cascante
- 2Department of Biochemistry and Molecular Biology, Faculty of Biology, Universitat de Barcelona, Barcelona, Spain
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16
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Camano S, Lazaro A, Moreno-Gordaliza E, Torres AM, de Lucas C, Humanes B, Lazaro JA, Milagros Gomez-Gomez M, Bosca L, Tejedor A. Cilastatin attenuates cisplatin-induced proximal tubular cell damage. J Pharmacol Exp Ther 2010; 334:419-29. [PMID: 20435919 DOI: 10.1124/jpet.110.165779] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
A major area in cancer therapy is the search for protective strategies against cisplatin-induced nephrotoxicity. We investigated the protective effect of cilastatin on cisplatin-induced injury to renal proximal tubular cells. Cilastatin is a specific inhibitor of renal dehydrodipeptidase I (DHP-I), which prevents hydrolysis of imipenem and its accumulation in the proximal tubule. Primary cultures of proximal cells were treated with cisplatin (1-30 microM) in the presence or absence of cilastatin (200 microg/ml). Apoptosis and mitochondrial injury were assessed by different techniques. Cisplatin uptake and DNA binding were measured by inductively coupled plasma spectrometry. HeLa cells were used to control the effect of cilastatin on the tumoricidal activity of cisplatin. Cisplatin increased cell death, apoptotic-like morphology, caspase activation, and mitochondrial injury in proximal tubular cells in a dose- and time-dependent way. Concomitant treatment with cilastatin reduced cisplatin-induced changes. Cilastatin also reduced the DNA-bound platinum but did not modify cisplatin-dependent up-regulation of death receptors (Fas) or ligands (tumor necrosis factor alpha, Fas ligand). In contrast, cilastatin did not show any effects on cisplatin-treated HeLa cells. Renal DHP-I was virtually absent in HeLa cells. Cilastatin attenuates cisplatin-induced cell death in proximal tubular cells without reducing the cytotoxic activity of cisplatin in tumor cells. Our findings suggest that the affinity of cilastatin for renal dipeptidase makes this effect specific for proximal tubular cells and may be related to a reduction in intracellular drug accumulation. Therefore, cilastatin administration might represent a novel strategy in the prevention of cisplatin-induced acute renal injury.
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Affiliation(s)
- Sonia Camano
- Renal Physiopathology Laboratory, Department of Nephrology, Hospital General Universitario Gregorio Maranon, 28007 Madrid, Spain
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17
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Amrani S, Harnafi H, Gadi D, Mekhfi H, Legssyer A, Aziz M, Martin-Nizard F, Bosca L. Vasorelaxant and anti-platelet aggregation effects of aqueous Ocimum basilicum extract. J Ethnopharmacol 2009; 125:157-62. [PMID: 19505553 DOI: 10.1016/j.jep.2009.05.043] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2008] [Revised: 05/11/2009] [Accepted: 05/29/2009] [Indexed: 02/07/2023]
Abstract
AIM OF THE STUDY In this work the endothelium-dependant vasorelaxant and anti-platelet aggregation activities of an aqueous extract from Ocimum basilicum were studied. MATERIALS AND METHODS The vasorelaxant effect was undertaken in thoracic aorta from three experimental groups of rats: one of them (NCG) fed with standard diet, the second (HCG) with hypercholesterolemic diet (HCD) and the third (BTG) with hypercholesterolemic diet together with an intragastric administration of Ocimum basilicum extract at a dose of 0.5 g/kg body weight for a period of 10 weeks. The in vitro anti-platelet aggregation of Ocimum basilicum extract was studied using thrombin (0.5 U/ml) and ADP (5 microM) as agonists. RESULTS The results show that the HCD statistically decreases vascular relaxation in HCG compared to NCG (p<0.001) and increases the vascular responses to phenylephrine (p<0.02). Ocimum basilicum extract exerts a significant vasorelaxant effect at 10(-5) M (p<0.01) and 10(-4) M carbachol (p=0.001). The plant extract also tends to suppress the elevated contractions induced by HCD (p=0.05). The extract inhibits ADP-induced platelet aggregation by 13%, 28.2%, 30.5%, 44.7% and 53% at a dose of 1, 2, 3, 4 and 5 g/l, respectively. Thrombin-induced platelet activation was also reduced by 15%, 23%, 40%, 38.4%, and 42% at the same doses of extract described above. CONCLUSION The use of Ocimum basilicum as medicinal plant could be beneficial for cardiovascular system.
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Affiliation(s)
- Souliman Amrani
- Laboratory of Biochemistry, Faculty of Sciences, University Mohammed I, 60000 Oujda, Morocco.
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18
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Ferderbar S, Faine L, Rudnicki M, Heras B, Bosca L, Abdalla D. Abstract: P707 PPAR ACTIVATION BY NITROLINOLEATE IS MEDIATED BY MAPK. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)70875-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] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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Traves PG, Hortelano S, Zeini M, Chao TH, Lam T, Neuteboom ST, Theodorakis EA, Palladino MA, Castrillo A, Bosca L. Selective activation of liver X receptors by acanthoic acid-related diterpenes. Mol Pharmacol 2007; 71:1545-53. [PMID: 17329499 DOI: 10.1124/mol.106.031906] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Terpenoids constitute a large family of natural steroids that are widely distributed in plants and insects. We investigated the effects of a series of diterpenes structurally related to acanthoic acid in macrophage functions. We found that diterpenes with different substitutions at the C4 position in ring A are potent activators of liver X receptors (LXRalpha and LXRbeta) in both macrophage cell lines from human and mouse origin and primary murine macrophages. Activation of LXR by these diterpenes was evaluated in transient transfection assays and gene expression analysis of known LXR-target genes, including the cholesterol transporters ABCA1 and ABCG1, the sterol regulatory element-binding protein 1c, and the apoptosis inhibitor of macrophages (Spalpha). Moreover, active diterpenes greatly stimulated cholesterol efflux from macrophages. It is interesting that these diterpenes antagonize inflammatory gene expression mainly through LXR-dependent mechanisms, indicating that these compounds can activate both LXR activation and repression functions. Stimulation of macrophages with acanthoic acid diterpenes induced LXR-target gene expression and cholesterol efflux to similar levels observed with synthetic agonists 3-[3-[N-(2-chloro-3-trifluoromethylbenzyl)-(2,2-diphenylethyl)-amino]propyloxy]phenylacetic acid hydrochloride (GW3965) and N-(2,2,2-trifluoroethyl)-N-[4-[2,2,2-trifluoro-1-hydroxy-1-(trifluoromethyl)-ethyl]phenyl]-benzenesulfonamide [T1317 (T0901317)]. These effects observed in gene expression were deficient in macrophages lacking both LXR isoforms (LXRalpha,beta(-/-)). These results show the ability of certain acanthoic acid diterpenes to activate efficiently both LXRs and suggest that these compounds can exert beneficial effects from a cardiovascular standpoint through LXR-dependent mechanisms.
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Affiliation(s)
- Paqui G Traves
- Centro Nacional de Investigaciones Cardiovasculares and Instituto de Investigaciones Biomédicas Alberto Sols, Madrid, Spain
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20
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Abstract
Adequate (wide or marginal and uncontaminated) margins and reconstruction are difficult to achieve when performing an internal hemipelvectomy for bone sarcomas involving the sacroiliac joint. We evaluated whether adequate surgical margins could be achieved and if functional outcomes could be predicted based on the type of resection and reconstruction. Forty patients had resections of the sacroiliac joint. Vertical sacral osteotomies were through the sacral wing (n = 2), ipsilateral sacral foramina (n = 27), sacral midline (n = 9), or contralateral foramina (n = 2). Iliac resections were Type I, Type I-II with partial or total acetabular re-section, or Type I-II-III. Surgical margins were adequate in 28 of 38 patients (74%), two (7%) of whom experienced local recurrence, compared with seven of 10 (70%) patients with inadequate margins. Reconstruction consisted of restoring continuity between the spine and pelvis. Resection of the entire acetabulum and removal of the lumbosacral trunk were the two main determinants of function, as assessed using the Musculoskeletal Tumor Society score. There were no life-threatening or function-threatening complications. Internal hemipelvectomy with a limb salvage procedure can be achieved with adequate surgical margins in selected patients. Functional outcomes can be predicted based on the type of resection and reconstruction, which helps the surgeon plan the procedure and inform the patient.
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Affiliation(s)
- C Court
- Department of Orthopaedic Surgery, Bicêtre Hospital, Paris XI University, Kremlin-Bicêtre, France.
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21
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Martín Sanz P, Hortelano S, Bosca L, Casado M. Cyclooxygenase 2: understanding the pathophysiological role through genetically altered mouse models. Front Biosci 2006; 11:2876-88. [PMID: 16720359 DOI: 10.2741/2016] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Cyclooxygenase (COX) -1 and -2 catalyze the first step in the biosynthesis of prostanoids. COX-1 is constitutively expressed in many tissues and seems to be involved in the housekeeping function of prostanoids. COX-2, the inducible isoform, accounts for the elevated production of prostaglandins in response to various inflammatory stimuli, hormones and growth factors. COX-2 expression has been also associated with cell growth regulation, tissue remodelling and carcinogenesis. More of these characteristics have been elucidate through using COX selective inhibitors. Recent advances in transgenic and gene-targeting approaches allow a sophisticated manipulation of the mouse genome by gene addition, gene deletion or gene modifications. The development of COX-2 genetically altered mice has provided models to elucidate the physiological and pathophysiological roles of this enzyme.
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Affiliation(s)
- Paloma Martín Sanz
- Centro de Investigaciones Biologicas CIB (CSIC), Centro Nacional de Investigaciones Cardiovasculares, Melchor Fernandez Almagro 3, 28029 Madrid, Spain
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Perez-Vizcaino F, Bishop-Bailley D, Lodi F, Duarte J, Cogolludo A, Moreno L, Bosca L, Mitchell JA, Warner TD. The flavonoid quercetin induces apoptosis and inhibits JNK activation in intimal vascular smooth muscle cells. Biochem Biophys Res Commun 2006; 346:919-25. [PMID: 16777073 DOI: 10.1016/j.bbrc.2006.05.198] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.2] [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: 05/28/2006] [Accepted: 05/31/2006] [Indexed: 02/07/2023]
Abstract
Quercetin, the most abundant dietary flavonol, exerts vasodilator, anti-hypertensive, and anti-atherogenic effects and reduces the vascular remodelling associated with elevated blood pressure. Here, we have compared the effects of quercetin in intimal- and medial-type rat vascular smooth muscle cells (VSMC) in culture. After 48 h, quercetin reduced the viability of a polyclonal intimal-type cell line derived from neonatal aorta but not of a medial-type cell line derived from adult aorta. These differential effects were similar in both proliferating and quiescent VSMC. Quercetin also preferentially reduced the viability of intimal-type over medial-type VSMC in primary cultures derived from balloon-injured carotid arteries. The effects of quercetin on cell viability were mainly dependent upon induction of apoptosis, as demonstrated by nuclear condensation and fragmentation, and were unrelated to PPARgamma, pro-oxidant effects or nitric oxide. The expression of MAPKs (ERK, p38, and JNK) and ERK phosphorylation were not different between intimal- and medial-type VSMC. p38 phosphorylation was negligible in both cell types. Medial-type showed a weak JNK phosphorylation while this was markedly increased in intimal-type cells. Quercetin reduced JNK phosphorylation but had no consistent effect on ERK phosphorylation. In conclusion, quercetin preferentially produced apoptosis in intimal-type compared to medial-type VSMC. This might play a role in the anti-atherogenic and anti-hypertensive effects of quercetin.
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Affiliation(s)
- Francisco Perez-Vizcaino
- Cardiac, Vascular and Inflammation Research, William Harvey Research Institute, Queen Mary University of London, UK.
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23
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Cogolludo A, Moreno L, Bosca L, Tamargo J, Perez-Vizcaino F. Thromboxane A2-induced inhibition of voltage-gated K+ channels and pulmonary vasoconstriction: role of protein kinase Czeta. Circ Res 2003; 93:656-63. [PMID: 12970114 DOI: 10.1161/01.res.0000095245.97945.fe] [Citation(s) in RCA: 114] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Voltage-gated K+ channels (KV) and thromboxane A2 (TXA2) play critical roles in controlling pulmonary arterial tone under physiological and pathological conditions. We hypothesized that TXA2 might inhibit KV channels, thereby establishing a link between these two major pathogenic pathways in pulmonary hypertension. The TXA2 analogue U46619 inhibited IK(V) (Emax=56.1+/-3.9%, EC50=0.054+/-0.019 micromol/L) and depolarized pulmonary artery smooth muscle cells via activation of TP receptors. In isolated pulmonary arteries, U46619 simultaneously increased intracellular Ca2+ concentration and contractile force, and these effects were inhibited by nifedipine or KCl (60 mmol/L). U46619-induced contractions were not altered by the inhibitors of tyrosine kinase genistein or Rho kinase Y-27632 but were prevented by the nonselective protein kinase C (PKC) inhibitors staurosporine and calphostin C. Furthermore, these responses were sensitive to Gö-6983 but insensitive to bisindolylmaleimide I and Gö-6976. Based on the specificity of these drugs, we suggested a role for an atypical PKC in U46619-induced effects. Thus, treatment with a PKCzeta pseudosubstrate inhibitor markedly prevented the vasoconstriction, the inhibition of IK(V), and the depolarization induced by U46619. Western blots showed a transient translocation of PKCzeta from the cytosolic to the particulate fraction on stimulation with U46619. These results indicate that TXA2 inhibits IK(V), leading to depolarization, activation of L-type Ca2+ channels, and vasoconstriction of rat pulmonary arteries. We propose PKCzeta as a link between TP receptor activation and KV channel inhibition.
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MESH Headings
- 15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic Acid/pharmacology
- Animals
- Bridged Bicyclo Compounds, Heterocyclic
- Calcium/metabolism
- Calcium Channels, L-Type/physiology
- Dose-Response Relationship, Drug
- Fatty Acids, Unsaturated
- Hydrazines/pharmacology
- In Vitro Techniques
- Male
- Membrane Potentials/drug effects
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/physiology
- Potassium Channels, Voltage-Gated/antagonists & inhibitors
- Potassium Channels, Voltage-Gated/physiology
- Protein Kinase C/antagonists & inhibitors
- Protein Kinase C/metabolism
- Protein Kinase C/physiology
- Pulmonary Artery/cytology
- Pulmonary Artery/drug effects
- Pulmonary Artery/physiology
- Rats
- Rats, Wistar
- Receptors, Thromboxane/antagonists & inhibitors
- Thromboxane A2/pharmacology
- Vasoconstriction/drug effects
- Vasoconstrictor Agents/pharmacology
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Affiliation(s)
- Angel Cogolludo
- Department of Pharmacology, School of Medicine, Universidad Complutense, 28040 Madrid, Spain.
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Sanchez V, Zeini M, Camarero J, O'Shea E, Bosca L, Green AR, Colado MI. The nNOS inhibitor, AR-R17477AR, prevents the loss of NF68 immunoreactivity induced by methamphetamine in the mouse striatum. J Neurochem 2003; 85:515-24. [PMID: 12675928 DOI: 10.1046/j.1471-4159.2003.01714.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The present study examined the time-course and regionally-selective changes in the levels of the neurofilament protein NF68 in the mouse brain induced by methamphetamine (METH). The ability of low ambient temperature, or of the specific neuronal nitric oxide synthase (nNOS) inhibitor AR-R17477AR, to protect against both long-term striatal NF68 and dopamine loss induced by METH (3 mg/kg, i.p.) was also studied. Seven days after METH administration (3, 6 and 9 mg/kg, i.p., three times at 3 h intervals), mice showed a reduction of about 40% in immunoreactivity for NF68 in the striatum. This effect was not produced in cortex after METH administration at the dose of 3 mg/kg. No difference from controls was observed when measurements were carried out 1 h and 24 h after the last METH injection at the dose of 3 mg/kg. The loss of NF68 immunoreactivity seems to be associated with the long-term dopamine depletion induced by METH, since no change in serotonin concentration is observed in either the striatum or cortex 7 days after dosing. Animals kept at a room temperature of 4 degrees C showed a loss of NF68 similar to those treated at 22 degrees C but an attenuation of dopamine depletion in the striatum. Pre-treatment with AR-R17477AR (5 mg/kg, s.c.) 30 min before each of the three METH (3 mg/kg, i.p.) injections provided complete protection against METH-induced loss of NF68 immunoreactivity and attenuated the decrease in striatal dopamine and HVA concentrations by about 50%. These data indicate that both the reduction of NF68 immunoreactivity and the loss of dopamine concentration are due to an oxidative stress process mediated by reactive nitrogen species, and are not due to changes in body temperature.
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Affiliation(s)
- Veronica Sanchez
- Departamento de Farmacologia and Facultad de Medicina Instituto de Bioquimica CSIC-UCM, Facultad de Farmacia, Universidad Complutense, Madrid, Spain.
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Ivaska J, Bosca L, Parker PJ. PKCepsilon is a permissive link in integrin-dependent IFN-gamma signalling that facilitates JAK phosphorylation of STAT1. Nat Cell Biol 2003; 5:363-9. [PMID: 12640464 DOI: 10.1038/ncb957] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.6] [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: 07/11/2002] [Revised: 12/22/2002] [Accepted: 01/31/2003] [Indexed: 02/07/2023]
Abstract
The critical dependence of receptor-triggered signals on integrin-mediated cell-substrate interactions represents a fundamental biological paradigm in health and disease. However, the molecular connections of these permissive inputs, which operate through integrin-matrix interactions, has remained largely obscure. Here we show that the serine-threonine kinase protein kinase C epsilon (PKCepsilon) functions as a signal integrator between cytokine and integrin signalling pathways. Integrins are shown to control PKCepsilon phosphorylation acutely by determining complex formation with protein phosphatase 2A (PP2A) and the upstream kinase PDK1 (phosphoinositide-dependent kinase 1). The PP2A-induced loss of PKCepsilon function results in attenuated interferon gamma (INF-gamma)-induced phosphorylation of STAT1 (signal transducer and activator of transcription 1) downstream of Janus kinase 1/2 (JAK1/2). PKCepsilon function and the IFN-gamma response can be recovered by inhibition of PP2A if PDK1 is associated with PKCepsilon in this complex. More directly, a PP2A-resistant mutant of PKCepsilon is sufficient for restoration of the IFN-gamma response in suspension culture. Thus, PKCepsilon functions as a central point of integration through which integrin engagement exerts a permissive input on IFN-gamma signalling.
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Affiliation(s)
- Johanna Ivaska
- Protein Phosphorylation Laboratory, Cancer Research UK London Research Institute, Lincoln's Inn Fields Laboratories, 44 Lincoln's Inn Fields, London WC2A 3PX, UK
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Castrillo A, de Las Heras B, Hortelano S, Rodriguez B, Villar A, Bosca L. Inhibition of the nuclear factor kappa B (NF-kappa B) pathway by tetracyclic kaurene diterpenes in macrophages. Specific effects on NF-kappa B-inducing kinase activity and on the coordinate activation of ERK and p38 MAPK. J Biol Chem 2001; 276:15854-60. [PMID: 11278990 DOI: 10.1074/jbc.m100010200] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The anti-inflammatory action of most terpenes has been explained in terms of the inhibition of nuclear factor kappaB (NF-kappaB) activity. Ent-kaurene diterpenes are intermediates of the synthesis of gibberellins and inhibit the expression of NO synthase-2 and the release of tumor necrosis factor-alpha in J774 macrophages challenged with lipopolysaccharide. These diterpenes inhibit NF-kappaB and IkappaB kinase (IKK) activation in vivo but failed to affect in vitro the function of NF-kappaB, the phosphorylation and targeting of IkappaBalpha, and the activity of IKK-2. Transient expression of NF-kappaB-inducing kinase (NIK) activated the IKK complex and NF-kappaB, a process that was inhibited by kaurenes, indicating that the inhibition of NIK was one of the targets of these diterpenes. These results show that kaurenes impair the inflammatory signaling by inhibiting NIK, a member of the MAPK kinase superfamily that interacts with tumor necrosis factor receptor-associated factors, and mediate the activation of NF-kappaB by these receptors. Moreover, kaurenes delayed the phosphorylation of p38, ERK1, and ERK2 MAPKs, but not that of JNK, in response to lipopolysaccharide treatment of J774 cells. The absence of a coordinate activation of MAPK and IKK might contribute to a deficient activation of NF-kappaB that is involved in the anti-inflammatory activity of these molecules.
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Affiliation(s)
- A Castrillo
- Instituto de Bioquimica, Centro Mixto Consejo Superior de Investigaciones Cientificas-Universidad Complutense de Madrid, Spain
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27
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Mojena M, Hortelano S, Castrillo A, Diaz-Guerra MJ, Garcia-Barchino MJ, Saez GT, Bosca L. Protection by nitric oxide against liver inflammatory injury in animals carrying a nitric oxide synthase-2 transgene. FASEB J 2001; 15:583-5. [PMID: 11259374 DOI: 10.1096/fj.00-0509fje] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The effect of pre-existent hepatic NO synthesis on liver injury induced by lipopolysaccharide was studied in animals carrying a nitric oxide synthase-2 (NOS-2) transgene under the control of the phosphoenolpyruvate carboxykinase (PEPCK) promoter. These animals expressed NOS-2 in liver cells under fasting conditions. Lipopolysaccharide-induced liver injury in D-galactosamine-conditioned mice, which enhanced notably the effect of the endotoxin on the liver, was impaired in animals expressing NOS-2. This protection against inflammatory liver damage was dependent on NO synthesis and was caused by an inhibition of nuclear factor kB (NF-kB) activity and an impairment of the synthesis of the proinflammatory cytokines tumor necrosis factor a and interleukin 1b. These data indicate that intrahepatic synthesis of NO protects liver by inhibiting the release of cascades of proinflammatory mediators and suggest a beneficial role for local delivery of NO in the control of liver injury.
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Affiliation(s)
- M Mojena
- Centro de Investigación Básica de España (CIBE), Merck Sharp & Dohme, Madrid, Spain
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28
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Abstract
We report the case of a 48-year-old woman operated on for rectal carcinoma and subsequently for metastasis located in three unusual sites (i.e., laryngeal, muscular and cutaneous). Three months after the last surgery, the patient was still alive, without any detectable metastasis.
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Affiliation(s)
- L Bosca
- Service de chirurgie générale et digestive, hôpital Rothschild, Paris, France
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29
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Parker PJ, Bosca L, Dekker L, Goode NT, Hajibagheri N, Hansra G. Protein kinase C (PKC)-induced PKC degradation: a model for down-regulation. Biochem Soc Trans 1995; 23:153-5. [PMID: 7758717 DOI: 10.1042/bst0230153] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- P J Parker
- Protein Phosphorylation Laboratory, Imperial Cancer Research Fund, London, U.K
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30
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Steil AA, Garcia Rodriguez MC, Alonso A, Crespo MS, Bosca L. Platelet-activating factor: the effector of protein-rich plasma extravasation and nitric oxide synthase induction in rat immune complex peritonitis. Br J Pharmacol 1995; 114:895-901. [PMID: 7539698 PMCID: PMC1510210 DOI: 10.1111/j.1476-5381.1995.tb13288.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
1. The involvement of platelet-activating factor (PAF) in immune complex-induced/polymorphonuclear-mediated tissue injury was studied by use of a reverse passive Arthus (RPA) model in the peritoneal cavity of rats. 2. Extravasation of protein-rich plasma, accumulation of polymorphonuclear leukocytes (PMN), and the production of nitric oxide (NO) by resident peritoneal mononuclear phagocytes were assayed. 3. Treatment of rats with either UR-12460 or BB-823, two compounds which possess different chemical structures, but elicit the same antagonistic effect on the PAF receptor, abrogated protein-rich plasma extravasation. In contrast, they did not show any effect on the accumulation of PMN. 4. Inhibition of NO production with both NG-mono methyl-L-arginine and NG-nitro-L-arginine failed to prevent protein-rich plasma extravasation. 5. The production of NO by peritoneal adherent cells following RPA was measured in cells maintained for 2 to 28 h in culture, and it was significantly increased in cells removed as early as 15 min after RPA induction, as compared to controls. 6. Addition of 10 nM PAF to the culture medium reduced the generation of NO by peritoneal cells from RPA rats, whereas this mediator enhanced NO production in cells from naive control animals. 7. Treatment with either UR-12460 or BB-823 prior to the induction of RPA produced an almost complete inhibition of NO production. 8. Assay of nitric oxide synthase activity in cell homogenates from peritoneal cells showed that the activity was due to the inducible form of the enzyme. 9. Study by Northen blotting of mRNA coding for the inducible NO synthase (iNOS) showed transcription at 6 and 18 h after the induction of RPA, which was inhibited in UR-12460-treated rats.10. These data indicate that PAF is the main mediator of the early plasma leakage observed in RPA,and also that PAF is implicated in the triggering of long-term changes via induction of specific genes, as judged from its ability to promote the expression of iNOS.
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Affiliation(s)
- A A Steil
- Departamento de Bioquimica y Fisiologia-CSIC, Facultad de Medicina, Valladolid, Spain
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31
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Bosca L, Stauber C, Hortelano S, Baixeras E, Martinez C. Characterization of signals leading to clonal expansion or to cell death during lymphocyte B cell activation. Curr Top Microbiol Immunol 1995; 200:39-50. [PMID: 7634836 DOI: 10.1007/978-3-642-79437-7_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- L Bosca
- Instituto de Bioquimica, CSIC, Universidad Complutense, Madrid, Spain
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32
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Baixeras E, Bosca L, Stauber C, Gonzalez A, Carrera AC, Gonzalo JA, Martinez C. From apoptosis to autoimmunity: insights from the signaling pathways leading to proliferation or to programmed cell death. Immunol Rev 1994; 142:53-91. [PMID: 7535291 DOI: 10.1111/j.1600-065x.1994.tb00883.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- E Baixeras
- Centro Nacional de Biotecnologia CSIC, Universidad Autonoma, Madrid, Spain
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33
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Abstract
Antigen receptor engagement initiates clonal expansion and antibody secretion in B lymphocytes in response to foreign antigens. However, binding of self antigen to antigen receptors targets self-reactive B cell clones for elimination or inactivation. The antigen-triggered biochemical events and the eventual response of the cells are dependent on the simultaneous occupancy of co-stimulatory receptors. CD2 is an intercellular adhesion molecule implicated in cell activation and expressed in human T and natural killer cells as well as in mouse B lymphocytes. Mouse B cells specific for allogeneic major histocompatibility complex (MHC) class I initiate a suicide program that leads to DNA fragmentation and cell death when confronted with soluble MHC class I while undergoing clonal expansion when the antigen is present on mitomycin C-treated cells. Here we show that occupancy of CD2 in mouse B cells by the presence of either monoclonal antibody (mAb) specific for CD2, or soluble recombinant mouse CD48, its natural ligand in mouse, prevents the induction of apoptosis. Furthermore, the in vitro activation by mitomycin C-treated allogeneic cells, is abrogated in the presence of anti-CD48 mAb (OX78). These results indicate that a CD2-CD48 interaction is involved in the control of B cell activation.
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Affiliation(s)
- A M Genaro
- Instituto de Bioquimica Facultad de Farmacia, CSIC, Universidad Complutense, Madrid, Spain
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34
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Junco M, Webster C, Crawford C, Bosca L, Parker PJ. Protein kinase C V3 domain mutants with differential sensitivities to m-calpain are not resistant to phorbol-ester-induced down-regulation. Eur J Biochem 1994; 223:259-63. [PMID: 8033900 DOI: 10.1111/j.1432-1033.1994.tb18990.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Distinct linker sequences were introduced into the protease-sensitive V3 domain of protein kinase C-alpha and the mutant proteins were expressed in COS-1 cells. Partially purified preparations of these mutants were functionally similar to wild-type protein kinase C-alpha, however their susceptibility to m-calpain was quite distinct, with one mutant being insensitive to cleavage. The three mutants, after expression in COS-1 cells, were found to behave in a manner indistinguishable from wild-type protein kinase C-alpha with respect to subcellular distribution, acute responses to 12-O-tetradecanoyl-phorbol 13-acetate and 12-O-tetradecanoyl-phorbol-13-acetate-induced down-regulation. The data imply that down-regulation of protein kinase C-alpha is likely to involve a general degradative process rather than cleavage by a site-specific protease.
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Affiliation(s)
- M Junco
- Protein Phosphorylation Laboratory, Imperial Cancer Research Fund, London, England
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35
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Marquez C, Martinez C, Kroemer G, Bosca L. Protein kinase C isoenzymes display differential affinity for phorbol esters. Analysis of phorbol ester receptors in B cell differentiation. The Journal of Immunology 1992. [DOI: 10.4049/jimmunol.149.8.2560] [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] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Abstract
Protein kinase C (PKC) comprises a family of distinct isoenzymes that are involved in signal transduction pathways linking the cell to triggers perceived via membrane receptors. These isoenzymes differ in their tissue distribution, activation requirements, and substrate specificity. One common denominator among different PKC subspecies is their activation by phorbol esters. We have developed a sensitive method permitting the measurement of phorbol ester binding sites, their quantitation, as well as their dissociation kinetics, by performing cytofluorometric analyses on intact cells or on isolated PKC associated to phosphatidylserine vesicles incubated in the presence of fluorochrome-labeled phorbol ester. Both PKC isozymes beta I/beta II and alpha from brain and spleen after incorporation into phosphatidylserine vesicles, display affinities with apparent Kd of 120 and 50 nM, respectively; although PKC gamma from brain exhibits a Kd of 210 nM. In addition to these receptors, on PKC isozymes from spleen, an intermediate affinity phorbol ester receptor (Kd of 3 nM) and an additional high affinity phorbol ester binding site with a Kd of 0.1 to 0.5 nM were also detected. This latter receptor comigrates with high m.w. PKC isoforms. In different cell lines, the phorbol ester binding patterns, as well as the expression of individual PKC isoenzymes, could be positively correlated.
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Affiliation(s)
- C Marquez
- Centro de Biología Molecular, CSIC, Madrid, Spain
| | - C Martinez
- Centro de Biología Molecular, CSIC, Madrid, Spain
| | - G Kroemer
- Centro de Biología Molecular, CSIC, Madrid, Spain
| | - L Bosca
- Centro de Biología Molecular, CSIC, Madrid, Spain
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36
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Marquez C, Martinez C, Kroemer G, Bosca L. Protein kinase C isoenzymes display differential affinity for phorbol esters. Analysis of phorbol ester receptors in B cell differentiation. J Immunol 1992; 149:2560-8. [PMID: 1401894 DOI: pmid/1401894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Protein kinase C (PKC) comprises a family of distinct isoenzymes that are involved in signal transduction pathways linking the cell to triggers perceived via membrane receptors. These isoenzymes differ in their tissue distribution, activation requirements, and substrate specificity. One common denominator among different PKC subspecies is their activation by phorbol esters. We have developed a sensitive method permitting the measurement of phorbol ester binding sites, their quantitation, as well as their dissociation kinetics, by performing cytofluorometric analyses on intact cells or on isolated PKC associated to phosphatidylserine vesicles incubated in the presence of fluorochrome-labeled phorbol ester. Both PKC isozymes beta I/beta II and alpha from brain and spleen after incorporation into phosphatidylserine vesicles, display affinities with apparent Kd of 120 and 50 nM, respectively; although PKC gamma from brain exhibits a Kd of 210 nM. In addition to these receptors, on PKC isozymes from spleen, an intermediate affinity phorbol ester receptor (Kd of 3 nM) and an additional high affinity phorbol ester binding site with a Kd of 0.1 to 0.5 nM were also detected. This latter receptor comigrates with high m.w. PKC isoforms. In different cell lines, the phorbol ester binding patterns, as well as the expression of individual PKC isoenzymes, could be positively correlated.
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Affiliation(s)
- C Marquez
- Centro de Biología Molecular, CSIC, Madrid, Spain
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37
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Cascales M, Martin-Sanz P, Bosca L. Phorbol esters, bombesin and insulin elicit differential responses on the 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase system in primary cultures of foetal and adult rat hepatocytes. Eur J Biochem 1992; 207:391-7. [PMID: 1321047 DOI: 10.1111/j.1432-1033.1992.tb17062.x] [Citation(s) in RCA: 12] [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] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The effects of 4 beta-phorbol 12-myristate 13-acetate (PMA), bombesin and insulin on 6-phosphofructo-2-kinase (PFK-2) activity, on fructose 2,6-bisphosphate concentration and on the phosphorylation state of PFK-2 were investigated in primary cultures of hepatocytes from foetal and adult rats. Bombesin stimulated PFK-2 activity and increased hexose phosphate (glucose 6-phosphate and fructose 6-phosphate) and fructose 2,6-bisphosphate content in hepatocytes both in the foetal and adult state. However, PMA-treated foetal cells exhibited a marked stimulation in fructose 2,6-bisphosphate concentration and in PFK-2 activity as well as in the content of hexose phosphates, while no response was found in the case of adult hepatocytes. Moreover, the effect of PMA on foetal hepatocytes was suppressed when cells were incubated with cycloheximide, but not when this effect was elicited by bombesin or insulin. These results, and those obtained on the phosphorylation state of PFK-2, suggest that there are different pathways that modulate fructose 2,6-bisphosphate content and, therefore, the control mechanisms of glycolysis and gluconeogenesis at this regulatory step, both in adult and foetal rat liver.
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Affiliation(s)
- M Cascales
- Instituto de Bioquimica, Facultad de Farmacia, Ciudad Universitaria, Madrid, Spain
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38
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Abstract
The activity of 6-phosphofructo-2-kinase (PFK-2), the enzyme that catalyses the synthesis of fructose 2,6-bisphosphate (Fru-2,6-P2), was inhibited by mercaptopurines in vitro. Inhibition was observed with the purified enzyme from rat liver and bovine heart, and in extracts from rat lymphocytes and hepatoma cells, chick embryo fibroblasts, and human HeLa and lymphoblastoid cells. Half-maximal effect was obtained with 0.1-0.2 mM mercaptopurine and maximal inhibition ranged between 50 and 90% depending on the enzyme preparation. The inhibition resulted from a decrease in Vmax with no change in Km for ATP. The inhibition was relieved by treatment of the enzyme with thiol reducing agents, suggesting that it involves the formation of a mixed disulfide between mercaptopurine and thiol group(s) essential for enzyme activity. Incubation of intact lymphocytes or lymphoblastoid cells with 2- or 6-mercaptopurine resulted in a decrease in Fru-2,6-P2 content and lactate release. A decrease in Fru-2,6-P2 content but no change in lactate release was observed in HeLa cells and fibroblasts treated with 6-mercaptopurine but not with 2-mercaptopurine. Treatment of HeLa cells with 6-mercaptopurine resulted in a decreased PFK-2 activity which could be restored by treatment of the cell extract with dithiothreitol. In isolated rat hepatocytes and perfused rat hearts mercaptopurines had little or no effect on the Fru-2,6-P2 content and lactate release. These results suggest that the effect of 6-mercaptopurine of arresting growth in lymphoid cells might involve the inhibition of glycolysis in addition to the known inhibition of de novo purine nucleotide synthesis.
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Affiliation(s)
- M Mojena
- Hormone and Metabolic Research Unit, Louvain University Medical School, Brussels, Belgium
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39
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Abstract
6-Phosphofructo-2-kinase (PFK-2) was analyzed in four organs of the anoxia-tolerant marine gastropod mollusk Busycon canaliculatum. Whelk PFK-2 resembled the nonhepatic enzyme from mammals with highest activity occurring in gill (22 pmol.min-1.g-1). Hepatopancreas PFK-2 was purified over 8,000-fold to a final specific activity of 11 mU/mg protein (at 20 degrees C) and gave a single band on sodium dodecyl sulfate-polyacrylamide gel electrophoresis. The enzyme was a dimer with a native molecular mass of 142 kDa and a subunit molecular mass of 67 kDa. The purified enzyme showed negligible fructose-2,6-bisphosphatase (FBPase-2) activity, although the activity ratio of PFK-2 to FBPase-2 was 0.625 in crude extracts. In response to environmental anoxia, the activity of PFK-2 dropped in all organs to 34-56% of the corresponding aerobic value (half-time was 2 h in gill), and the Michaelis constant for fructose 6-phosphate increased by 50% (to 92 microM in gill). These changes paralleled decreases in organ fructose 2,6-bisphosphate concentration and pyruvate kinase activity and contribute to the overall glycolytic rate depression induced by anoxia in this facultative anaerobe. In vitro treatment of the anoxic form of hepatopancreas PFK-2 with alkaline phosphatase increased enzyme activity, suggesting that the aerobic and anoxic enzyme forms are interconverted by reversible protein phosphorylation. However, the protein kinase involved in this process is not yet known; incubation of aerobic PFK-2 with Mg-ATP plus adenosine 3',5'-cyclic monophosphate-dependent protein kinase or protein kinase C did not alter enzyme activity.
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Affiliation(s)
- L Bosca
- Instituto de Bioquímica, Facultad de Farmacia, Ciudad Universitaria, Madrid, Spain
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40
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Bosca L, Mojena M, Diaz-Guerra JM, Marquez C. Phorbol 12,13-dibutyrate and mitogens increase fructose 2,6-bisphosphate in lymphocytes. Comparison of lymphocyte and rat-liver 6-phosphofructo-2-kinase. Eur J Biochem 1988; 175:317-23. [PMID: 2969804 DOI: 10.1111/j.1432-1033.1988.tb14199.x] [Citation(s) in RCA: 21] [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] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The influence of tumour promoters and growth factors on glycolysis and on fructose-2,6-bisphosphate concentration was studied in isolated mouse spleen lymphocytes and in purified B-cells. The intracellular concentration of fructose 2,6-bisphosphate and the rate of lactate release were increased 2-3-fold in spleen lymphocytes exposed to active phorbol esters, mitogenic lectins, interleukin 4 or lipopolysaccharide. The maximal effect was observed after 1 h of exposure. In these cells hexose 6-phosphates increased 2-fold and 6-phosphofructo-2-kinase activity remained unchanged after treatment with phorbol 12,13-dibutyrate or with lectins. Exposure of B-cells to phorbol 12,13-dibutyrate, interleukin 4 or lipopolysaccharide increased the glycolytic flux and the concentration of fructose 2,6-bisphosphate without relation to their mitogenic activity. Lymphocytes and rat liver 6-phosphofructo-2-kinase were partially purified using the same procedure. The lymphocyte enzyme was not inhibited by sn-glycerol 3-phosphate in contrast to the potent inhibition observed in liver. Treatment of both enzymes with the catalytic subunit of the cyclic-AMP-dependent protein kinase failed to inactivate 6-phosphofructo-2-kinase from lymphocytes. These differences suggest that lymphocytes and liver contain different forms of this enzyme.
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Affiliation(s)
- L Bosca
- Instituto de Bioquímica, Facultad de Farmacia, Madrid, Spain
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41
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Díaz-Guerra MJ, Sánchez-Prieto J, Bosca L, Pocock J, Barrie A, Nicholls D. Phorbol ester translocation of protein kinase C in guinea-pig synaptosomes and the potentiation of calcium-dependent glutamate release. Biochim Biophys Acta 1988; 970:157-65. [PMID: 2454672 DOI: 10.1016/0167-4889(88)90174-7] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The distribution of protein kinase C activity and specific phorbol ester binding sites between soluble and particulate fractions of isolated guinea-pig cerebral cortical synaptosomes is examined following preincubation with phorbol esters. Half-maximal decrease in cytosolic activity requires 10 nM 4 beta-phorbol myristoyl acetate. Specific [3H]phorbol dibutyrate binding sites are translocated from cytoplasmic to particulate fractions in parallel with protein kinase C activity. Depolarization of the plasma membrane by 30 mM KCl does not cause translocation of protein kinase C. 1 microM 4 beta-phorbol myristoyl acetate and 1 microM 4 beta-phorbol didecanoate (but not 1 microM 4 alpha-phorbol didecanoate) enhance the release of glutamate from synaptosomes partially depolarized by 10 mM KCl; however, 4 beta-phorbol myristoyl acetate is ineffective at 20 nM. 1 microM 4 beta-phorbol myristoyl acetate slightly increases the cytosolic free Ca2+ concentration of polarized synaptosomes, but not that following partial depolarization. 4 beta-Phorbol myristoyl acetate causes a concentration-dependent increase in the Ca2+-dependent glutamate release induced by sub-optimal ionomycin concentrations, but is without effect on the release induced by maximal ionomycin. It is concluded that phorbol esters stereospecifically enhance the Ca2+-sensitivity of glutamate release, but that higher concentrations may be required than for protein kinase C translocation in the same preparation. Instead the enhancement may be related to the rapid inactivation of protein kinase C which occurs with phorbol esters.
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Affiliation(s)
- M J Díaz-Guerra
- Instituto de Bioquímica, Facultad de Farmacia, Madrid, Spain
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42
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Bosca L, Mojena M, Ghysdael J, Rousseau GG, Hue L. Expression of the v-src or v-fps oncogene increases fructose 2,6-bisphosphate in chick-embryo fibroblasts. Novel mechanism for the stimulation of glycolysis by retroviruses. Biochem J 1986; 236:595-9. [PMID: 2944513 PMCID: PMC1146881 DOI: 10.1042/bj2360595] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The concentration of fructose 2,6-bisphosphate and the activity of 6-phosphofructo-2-kinase are increased after infection of chick-embryo fibroblasts with the Rous sarcoma virus, or with a temperature-sensitive mutant of this virus at the permissive, but not at the non-permissive, temperature. This is observed after transformation by retroviruses carrying either the v-src or v-fps, but not the v-mil and/or v-myc, oncogenes. Comparison of the effects of the Rous sarcoma virus with those of phorbol myristate acetate on fructose 2,6-bisphosphate suggests that both result from the stimulation of a step which is rate-limiting for 6-phosphofructo-2-kinase activation and which is also controlled by protein kinase C.
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43
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Mojena M, Bosca L, Hue L. Effect of glutamine on fructose 2,6-bisphosphate and on glucose metabolism in HeLa cells and in chick-embryo fibroblasts. Biochem J 1985; 232:521-7. [PMID: 2936331 PMCID: PMC1152911 DOI: 10.1042/bj2320521] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Glutamine caused a dose-dependent decrease in fructose 2,6-bisphosphate concentration in both HeLa cells and chick-embryo fibroblasts. The effect was complete within 15 min in HeLa cells, but required more than 9 h in the fibroblasts. Half-maximal effects were obtained with 0.1-0.3 mM-glutamine. In chick-embryo fibroblasts, but not in HeLa cells, glutamine induced a time-dependent decrease in the activity of phosphofructokinase-2, which correlated with the decrease in fructose 2,6-bisphosphate. Glutamine decreased the glycolytic flux by about 25% only in chick-embryo fibroblasts. The difference in glycolytic response between the two types of cells might correspond to a difference in the sensitivity of phosphofructokinase-1 for fructose 2,6-bisphosphate. In HeLa cells, glutamine caused a 2-3-fold stimulation of the synthesis of glycogen, a 50% decrease in the concentration of fructose 1,6-bisphosphate and a more than 80% decrease in the concentration of 5-phosphoribosyl pyrophosphate; the concentrations of hexose 6-phosphates and ATP were not affected.
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44
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Bosca L, Rousseau GG, Hue L. Phorbol 12-myristate 13-acetate and insulin increase the concentration of fructose 2,6-bisphosphate and stimulate glycolysis in chicken embryo fibroblasts. Proc Natl Acad Sci U S A 1985; 82:6440-4. [PMID: 2931720 PMCID: PMC390732 DOI: 10.1073/pnas.82.19.6440] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Incubation of chicken embryo fibroblasts with mitogenic concentrations of insulin for 24 hr or with the tumor promoter phorbol 12-myristate 13-acetate for 6 hr stimulated lactate release and 3-O-methylglucose uptake. Insulin also increased the Vmax of 6-phosphofructo-1-kinase (ATP:D-fructose-6-phosphate 1-phosphotransferase, EC 2.7.1.11). Both agents increased the concentration of fructose 2,6-bisphosphate and the activity of 6-phosphofructo-2-kinase (EC 2.7.1.-), the enzyme that catalyzes the synthesis of this stimulator of 6-phosphofructo-1-kinase. These changes provide an explanation for the stimulation of glycolysis by insulin and phorbol esters. In contrast to the situation in rat liver, fructose 2,6-bisphosphate concentration did not decrease after cyclic AMP treatment. Incubation of cells with phorbol ester analogues or with glycerol derivatives that are known to stimulate, or to bind to, protein kinase C did increase the concentration of fructose 2,6-bisphosphate, suggesting that the stimulation of 6-phosphofructo-2-kinase by phorbol 12-myristate 13-acetate is mediated by protein kinase C.
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Bosca L, Challiss RA, Newsholme EA. The effect of fructose 2,6-bisphosphate on muscle fructose-1,6-bisphosphatase activity. Biochim Biophys Acta 1985; 828:151-4. [PMID: 2983768 DOI: 10.1016/0167-4838(85)90051-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Rat and rabbit muscle fructose 1,6-bisphosphatase (D-fructose-1,6-bisphosphate 1-phosphohydrolase, EC 3.1.3.11) are inhibited by fructose 2,6-bisphosphate. In contrast with the liver isozyme, the inhibition of muscle fructose-1,6-bisphosphatase by fructose 2,6-bisphosphate is not synergistic with that of AMP. Activation of fructose-1,6-bisphosphatase by fructose 2,6-bisphosphate has been observed at high concentrations of substrate. An attempt is made to correlate changes in concentrations of hexose monophosphate, fructose 1,6-bisphosphate and fructose 2,6-bisphosphate with changes in fluxes through 6-phosphofructokinase and fructose-1,6-bisphosphatase in isolated epitrochlearis muscle challenged with insulin and adrenaline.
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Hue L, Sobrino F, Bosca L. Difference in glucose sensitivity of liver glycolysis and glycogen synthesis. Relationship between lactate production and fructose 2,6-bisphosphate concentration. Biochem J 1984; 224:779-86. [PMID: 6240979 PMCID: PMC1144513 DOI: 10.1042/bj2240779] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Incubation of isolated rat hepatocytes from fasted rats with 0-6 mM-glucose caused an increase in [fructose 2,6-bisphosphate] (0.2 to about 5 nmol/g) without net lactate production. A release of 3H2O from [3-3H]glucose was, however, detectable, indicating that phosphofructokinase was active and that cycling occurred between fructose 6-phosphate and fructose 1,6-bisphosphate. A relationship between [fructose 2,6-bisphosphate] and lactate production was observed when hepatocytes were incubated with [glucose] greater than 6 mM. Incubation with glucose caused a dose-dependent increase in [hexose 6-phosphates]. The maximal capacity of liver cytosolic proteins to bind fructose 2,6-bisphosphate was 15 nmol/g, with affinity constants of 5 X 10(6) and 0.5 X 10(6) M-1. One can calculate that, at 5 microM, more than 90% of fructose 2,6-bisphosphate is bound to cytosolic proteins. In livers of non-anaesthetized fasted mice, the activation of glycogen synthase was more sensitive to glucose injection than was the increase in [fructose 2,6-bisphosphate], whereas the opposite situation was observed in livers of fed mice. Glucose injection caused no change in the activity of liver phosphofructokinase-2 and decreased the [hexose 6-phosphates] in livers of fed mice.
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Lazo PA, Bosca L. Mitochondrial membrane-bound hexokinase of ascites tumor cells. Functional implications of lysine residues studied by modification with imidoesters. Hoppe Seylers Z Physiol Chem 1982; 363:635-41. [PMID: 6809558 DOI: 10.1515/bchm2.1982.363.1.635] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Conformational changes of hexokinase from ascites tumor cells have been studied by chemical modification of lysine residues with imidoesters with the following results: 1) The membrane-bound enzyme, in contrast to the soluble enzyme, is not inactivated by treatment with dimethyl suberimidate, which suggests (a) lysine residue(s) essential for the activity that is protected in the membrane-bound enzyme. 2) Three different conformations have been detected in the membrane-bound enzyme. Two of these are induced by glucose and glucose 6-phosphate, respectively. 3) Treatment of the membrane-bound enzyme with dimethyl suberimidate affects its sensitivity to the inhibition by glucose 6-phosphate, but not its activity or degree of maximal inhibition. This suggests that lysine(s) is related to the binding of glucose 6-phosphate to its allosteric regulatory site. 4) In intact tumor cells, most, if not all, of the hexokinase activity seems to be in a membrane-bound form.
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