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Pedraz-Valdunciel C, Filipska M, Giannoukakos S, Potie N, Fernandez-Hilario A, Hackenberg M, Aguilar-Hernández A, Valarezo J, Huang C, Capitán AG, Esteban CA, Warren S, Molina-Vila M, Rosell R. P23.02 Digital Multiplexed circRNA Analysis From Plasma-Derived Extracellular Vesicles of Lung Cancer Patients. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.362] [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: 11/30/2022]
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2
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Gómez-Martín C, Aparicio-Puerta E, Medina JM, Barturen G, Oliver JL, Hackenberg M. geno 5mC: A Database to Explore the Association between Genetic Variation (SNPs) and CpG Methylation in the Human Genome. J Mol Biol 2020; 433:166709. [PMID: 33188782 DOI: 10.1016/j.jmb.2020.11.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 10/15/2020] [Accepted: 11/06/2020] [Indexed: 01/23/2023]
Abstract
Genetic variation, gene expression and DNA methylation influence each other in a complex way. To study the impact of sequence variation and DNA methylation on gene expression, we generated geno5mC, a database that contains statistically significant SNP-CpG associations that are biologically classified either through co-localization with known regulatory regions (promoters and enhancers), or through known correlations with the expression levels of nearby genes. The SNP rs727563 can be used to illustrate the usefulness of this approach. This SNP has been associated with inflammatory bowel disease through GWAS, but it is not located near any gene related to this phenotype. However, geno5mC reveals that rs727563 is associated with the methylation state of several CpGs located in promoter regions of genes reported to be involved in inflammatory processes. This case exemplifies how geno5mC can be used to infer relevant and previously unknown interactions between described disease-associated SNPs and their functional targets.
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Affiliation(s)
- C Gómez-Martín
- Dpto. de Genética, Facultad de Ciencias, Universidad de Granada, Campus de Fuentenueva s/n, 18071 Granada, Spain; Lab. de Bioinformática, Instituto de Biotecnología, Centro de Investigación Biomédica, PTS, Avda. del Conocimiento s/n, 18100 Granada, Spain
| | - E Aparicio-Puerta
- Dpto. de Genética, Facultad de Ciencias, Universidad de Granada, Campus de Fuentenueva s/n, 18071 Granada, Spain; Lab. de Bioinformática, Instituto de Biotecnología, Centro de Investigación Biomédica, PTS, Avda. del Conocimiento s/n, 18100 Granada, Spain; Instituto de Investigación Biosanitaria (IBS) Granada, University Hospitals of Granada-University, Granada, Spain, Conocimiento s/n, 18100 Granada, Spain; Excellence Research Unit "Modeling Nature" (MNat), University of Granada, 18071 Granada, Spain
| | - J M Medina
- Dpto. de Genética, Facultad de Ciencias, Universidad de Granada, Campus de Fuentenueva s/n, 18071 Granada, Spain; Lab. de Bioinformática, Instituto de Biotecnología, Centro de Investigación Biomédica, PTS, Avda. del Conocimiento s/n, 18100 Granada, Spain
| | - Guillermo Barturen
- Centro Pfizer-Universidad de Granada-Junta de Andalucía de Genómica e Investigación Oncológica, Genetics of Complex Diseases, 18016 Granada, Spain
| | - J L Oliver
- Dpto. de Genética, Facultad de Ciencias, Universidad de Granada, Campus de Fuentenueva s/n, 18071 Granada, Spain; Lab. de Bioinformática, Instituto de Biotecnología, Centro de Investigación Biomédica, PTS, Avda. del Conocimiento s/n, 18100 Granada, Spain
| | - M Hackenberg
- Dpto. de Genética, Facultad de Ciencias, Universidad de Granada, Campus de Fuentenueva s/n, 18071 Granada, Spain; Lab. de Bioinformática, Instituto de Biotecnología, Centro de Investigación Biomédica, PTS, Avda. del Conocimiento s/n, 18100 Granada, Spain; Instituto de Investigación Biosanitaria (IBS) Granada, University Hospitals of Granada-University, Granada, Spain, Conocimiento s/n, 18100 Granada, Spain; Excellence Research Unit "Modeling Nature" (MNat), University of Granada, 18071 Granada, Spain.
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3
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Green JA, Ephraim PL, Hill-Briggs FF, Browne T, Strigo TS, Hauer CL, Stametz RA, Darer JD, Patel UD, Lang-Lindsey K, Bankes BL, Bolden SA, Danielson P, Ruff S, Schmidt L, Swoboda A, Woods P, Vinson B, Littlewood D, Jackson G, Pendergast JF, St Clair Russell J, Collins K, Norfolk E, Bucaloiu ID, Kethireddy S, Collins C, Davis D, dePrisco J, Malloy D, Diamantidis CJ, Fulmer S, Martin J, Schatell D, Tangri N, Sees A, Siegrist C, Breed J, Medley A, Graboski E, Billet J, Hackenberg M, Singer D, Stewart S, Alkon A, Bhavsar NA, Lewis-Boyer L, Martz C, Yule C, Greer RC, Saunders M, Cameron B, Boulware LE. Putting patients at the center of kidney care transitions: PREPARE NOW, a cluster randomized controlled trial. Contemp Clin Trials 2018; 73:98-110. [PMID: 30218818 PMCID: PMC6679594 DOI: 10.1016/j.cct.2018.09.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [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: 05/15/2018] [Revised: 08/28/2018] [Accepted: 09/07/2018] [Indexed: 12/21/2022]
Abstract
Care for patients transitioning from chronic kidney disease to kidney failure often falls short of meeting patients' needs. The PREPARE NOW study is a cluster randomized controlled trial studying the effectiveness of a pragmatic health system intervention, 'Patient Centered Kidney Transition Care,' a multi-component health system intervention designed to improve patients' preparation for kidney failure treatment. Patient-Centered Kidney Transition Care provides a suite of new electronic health information tools (including a disease registry and risk prediction tools) to help providers recognize patients in need of Kidney Transitions Care and focus their attention on patients' values and treatment preferences. Patient-Centered Kidney Transition Care also adds a 'Kidney Transitions Specialist' to the nephrology health care team to facilitate patients' self-management empowerment, shared-decision making, psychosocial support, care navigation, and health care team communication. The PREPARE NOW study is conducted among eight [8] outpatient nephrology clinics at Geisinger, a large integrated health system in rural Pennsylvania. Four randomly selected nephrology clinics employ the Patient Centered Kidney Transitions Care intervention while four clinics employ usual nephrology care. To assess intervention effectiveness, patient reported, biomedical, and health system outcomes are collected annually over a period of 36 months via telephone questionnaires and electronic health records. The PREPARE NOW Study may provide needed evidence on the effectiveness of patient-centered health system interventions to improve nephrology patients' experiences, capabilities, and clinical outcomes, and it will guide the implementation of similar interventions elsewhere. TRIAL REGISTRATION NCT02722382.
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Affiliation(s)
- J A Green
- Department of Nephrology, Geisinger Commonwealth School of Medicine, Danville, PA, USA; Kidney Health Research Institute, Geisinger, Danville, PA, USA.
| | - P L Ephraim
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA; Welch Center for Prevention, Epidemiology and Clinical Research, Baltimore, MD, USA.
| | - F F Hill-Briggs
- Division of General Internal Medicine, Johns Hopkins University, Baltimore, MD, USA.
| | - T Browne
- College of Social Work, University of South Carolina, Columbia, SC, USA.
| | - T S Strigo
- Division of General Internal Medicine, Duke University School of Medicine, Durham, NC, USA.
| | - C L Hauer
- Center for Clinical Innovation, Institute for Advanced Application, Geisinger, Danville, PA, USA.
| | - R A Stametz
- Center for Clinical Innovation, Institute for Advanced Application, Geisinger, Danville, PA, USA.
| | - J D Darer
- Decision Support Siemens Healthineers Malvern, PA, USA.
| | - U D Patel
- Division of Nephrology, Duke University School of Medicine, Durham, NC, USA; Gilead Sciences, Inc., Foster City, CA, USA.
| | - K Lang-Lindsey
- Department of Social Work, Alabama State University, Montgomery, AL, USA.
| | - B L Bankes
- Patient stakeholder co-author, Bloomsburg, PA, USA
| | - S A Bolden
- Patient stakeholder co-author, Jacksonville, FL, USA
| | - P Danielson
- Patient stakeholder co-author, Portland, OR, USA
| | - S Ruff
- Patient stakeholder co-author, Mooresville, NC, USA
| | - L Schmidt
- Patient stakeholder co-author, Liberty, Illinois, USA
| | - A Swoboda
- Patient stakeholder co-author, Edgewater, MD, USA
| | - P Woods
- Patient stakeholder co-author, Hartsdale, New York, NY, USA
| | - B Vinson
- Quality Insights Renal Network 5, Richmond, VA, USA.
| | - D Littlewood
- The Care Centered Collaborative, Pennsylvania Medical Society, Harrisburg, PA, USA.
| | - G Jackson
- Division of General Internal Medicine, Duke University School of Medicine, Durham, NC, USA.
| | - J F Pendergast
- Department of Biostatistics & Bioinformatics, Duke University School of Medicine, Durham, NC, USA.
| | - J St Clair Russell
- Division of General Internal Medicine, Duke University School of Medicine, Durham, NC, USA.
| | - K Collins
- Patient Services, National Kidney Foundation, New York, NY, USA.
| | - E Norfolk
- Department of Nephrology, Geisinger Commonwealth School of Medicine, Danville, PA, USA.
| | - I D Bucaloiu
- Department of Nephrology, Geisinger Medical Center, Danville, PA, USA.
| | - S Kethireddy
- Critical Care Medicine, Northeast Georgia Health System, Gainesville, GA, USA
| | - C Collins
- Adult Psychology and Behavioral Medicine, Department of Psychiatry, Geisinger, Danville, PA, USA.
| | - D Davis
- Center for Translational Bioethics and Health Care Policy, Geisinger, Danville, PA, USA.
| | - J dePrisco
- Center for Clinical Innovation, Institute for Advanced Application, Geisinger, Danville, PA, USA.
| | - D Malloy
- Center for Clinical Innovation, Institute for Advanced Application, Geisinger, Danville, PA, USA.
| | - C J Diamantidis
- Division of General Internal Medicine, Duke University School of Medicine, Durham, NC, USA; Division of Nephrology, Duke University School of Medicine, Durham, NC, USA.
| | - S Fulmer
- Geisinger Health Plan, Danville, PA, USA.
| | - J Martin
- Program Development, National Kidney Foundation, New York, NY, USA.
| | - D Schatell
- Medical Education Institute, Madison, WI, USA.
| | - N Tangri
- Department of Medicine, Section of Nephrology, University of Manitoba, 66 Chancellors Cir, Winnipeg, MB R3T 2N2, Canada; Chronic Disease Innovation Center, Seven Oaks General Hospital, 2300 Mcphillips St, Winnipeg, MB R2V 3M3, Canada.
| | - A Sees
- Anthem, Inc., Indianapolis, IN, USA
| | - C Siegrist
- Center for Clinical Innovation, Institute for Advanced Application, Geisinger, Danville, PA, USA.
| | - J Breed
- Center for Clinical Innovation, Institute for Advanced Application, Geisinger, Danville, PA, USA.
| | - A Medley
- Geisinger Health Plan, Danville, PA, USA.
| | - E Graboski
- Kidney Health Research Institute, Geisinger, Danville, PA, USA.
| | - J Billet
- Center for Clinical Innovation, Institute for Advanced Application, Geisinger, Danville, PA, USA.
| | - M Hackenberg
- Center for Clinical Innovation, Institute for Advanced Application, Geisinger, Danville, PA, USA.
| | - D Singer
- Renal Physicians Association, Rockville, MD, USA.
| | - S Stewart
- Council of Nephrology Social Workers, National Kidney Foundation, New York, NY, USA.
| | - A Alkon
- Division of General Internal Medicine, Duke University School of Medicine, Durham, NC, USA.
| | - N A Bhavsar
- Division of General Internal Medicine, Duke University School of Medicine, Durham, NC, USA.
| | - L Lewis-Boyer
- Welch Center for Prevention, Epidemiology and Clinical Research, Baltimore, MD, USA; Division of General Internal Medicine, Johns Hopkins University, Baltimore, MD, USA.
| | - C Martz
- Geisinger Health Plan, Danville, PA, USA.
| | - C Yule
- Kidney Health Research Institute, Geisinger, Danville, PA, USA.
| | - R C Greer
- Welch Center for Prevention, Epidemiology and Clinical Research, Baltimore, MD, USA; Division of General Internal Medicine, Johns Hopkins University, Baltimore, MD, USA.
| | - M Saunders
- Section of General Internal Medicine, Department of Medicine, University of Chicago Medical Center, Chicago, IL, USA.
| | - B Cameron
- Division of Nephrology, Department of Medicine, Duke University School of Medicine, Durham, NC, USA.
| | - L E Boulware
- Division of General Internal Medicine, Duke University School of Medicine, Durham, NC, USA.
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Fromm B, Ovchinnikov V, Høye E, Bernal D, Hackenberg M, Marcilla A. On the presence and immunoregulatory functions of extracellular microRNAs in the trematode Fasciola hepatica. Parasite Immunol 2017; 39. [PMID: 27809346 DOI: 10.1111/pim.12399] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Accepted: 10/28/2016] [Indexed: 12/16/2022]
Abstract
Liver flukes represent a paraphyletic group of endoparasitic flatworms that significantly affect man either indirectly due to economic damage on livestock or directly as pathogens. A range of studies have focussed on how these macroscopic organisms can evade the immune system and live inside a hostile environment such as the mammalian liver and bile ducts. Recently, microRNAs, a class of short noncoding gene regulators, have been proposed as likely candidates to play roles in this scenario. MicroRNAs (miRNAs) are key players in development and pathogenicity and are highly conserved between metazoans: identical miRNAs can be found in flatworms and mammalians. Interestingly, miRNAs are enriched in extracellular vesicles (EVs) which are secreted by most cells. EVs constitute an important mode of parasite/host interaction, and recent data illustrate that miRNAs play a vital part. We have demonstrated the presence of miRNAs in the EVs of the trematode species Dicrocoelium dendriticum and Fasciola hepatica (Fhe) and identified potential immune-regulatory miRNAs with targets in the host. After our initial identification of miRNAs expressed by F. hepatica, an assembled genome and additional miRNA data became available. This has enabled us to update the known complement of miRNAs in EVs and speculate on potential immune-regulatory functions that we review here.
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Affiliation(s)
- B Fromm
- Department of Tumor Biology, Institute for Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, Nydalen, Oslo, Norway
| | - V Ovchinnikov
- Department of Human and Animal Genetics, The Federal Research Center, Institute of Cytology and Genetics, The Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russian Federation
| | - E Høye
- Department of Tumor Biology, Institute for Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, Nydalen, Oslo, Norway
| | - D Bernal
- Departamento de Bioquímica y Biología Molecular, Universitat de València, Burjassot, Valencia, Spain
| | - M Hackenberg
- Facultad de Ciencias, Departamento de Genética, Universidad de Granada, Granada, Spain.,Laboratorio de Bioinformática, Instituto de Biotecnología, Centro de Investigación Biomédica, Granada, Spain
| | - A Marcilla
- Área de Parasitología, Departamento de Farmacia y Tecnologia Farmacéutica y Parasitología, Universitat de València, Burjassot, Valencia, Spain.,Joint Research Unit on Endocrinology, Nutrition and Clinical Dietetics, Health Research Institute-La Fe, Universitat de Valencia, Valencia, Spain
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5
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Fisicaro G, Huet K, Negru R, Hackenberg M, Pichler P, Taleb N, La Magna A. Anomalous impurity segregation and local bonding fluctuation in l-Si. Phys Rev Lett 2013; 110:117801. [PMID: 25166579 DOI: 10.1103/physrevlett.110.117801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2012] [Indexed: 06/03/2023]
Abstract
Anomalous impurity redistribution after a laser irradiation process in group-IV elements has been reported in numerous papers. In this Letter, we correlate this still unexplained behavior with the peculiar bonding character of the liquid state of group-IV semiconductors. Analyzing the B-Si system in a wide range of experimental conditions we demonstrate that this phenomenon derives from the non-Fickian diffusion transport of B in l-Si. The proposed diffusion model relies on the balance between two impurity states in different bonding configurations: one migrating at higher diffusivity than the other. This microscopic mechanism explains the anomalous B segregation, whereas accurate comparisons between experimental chemical profiles and simulation results validate the model.
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Affiliation(s)
- G Fisicaro
- CNR IMM, Z.I. VIII Strada 5, I -95121 Catania, Italy
| | - K Huet
- Excico 13-21 Quai des Gresillons, 92230 Gennevilliers, France
| | - R Negru
- Excico 13-21 Quai des Gresillons, 92230 Gennevilliers, France
| | - M Hackenberg
- Fraunhofer Institute for Integrated Systems and Device Technology, Schottkystrasse 10, 91058 Erlangen, Germany
| | - P Pichler
- Fraunhofer Institute for Integrated Systems and Device Technology, Schottkystrasse 10, 91058 Erlangen, Germany and Chair of Electron Devices, University of Erlangen-Nuremberg, Cauerstrasse 6, 91058 Erlangen, Germany
| | - N Taleb
- Probion, 37 Rue de Fontenay, 92220 Bagneux, France
| | - A La Magna
- CNR IMM, Z.I. VIII Strada 5, I -95121 Catania, Italy
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6
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Bernaola-Galván P, Oliver J, Hackenberg M, Coronado A, Ivanov P, Carpena P. Segmentation of time series with long-range fractal correlations. Eur Phys J B 2012; 85:211. [PMID: 23645997 PMCID: PMC3643524 DOI: 10.1140/epjb/e2012-20969-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Segmentation is a standard method of data analysis to identify change-points dividing a nonstationary time series into homogeneous segments. However, for long-range fractal correlated series, most of the segmentation techniques detect spurious change-points which are simply due to the heterogeneities induced by the correlations and not to real nonstationarities. To avoid this oversegmentation, we present a segmentation algorithm which takes as a reference for homogeneity, instead of a random i.i.d. series, a correlated series modeled by a fractional noise with the same degree of correlations as the series to be segmented. We apply our algorithm to artificial series with long-range correlations and show that it systematically detects only the change-points produced by real nonstationarities and not those created by the correlations of the signal. Further, we apply the method to the sequence of the long arm of human chromosome 21, which is known to have long-range fractal correlations. We obtain only three segments that clearly correspond to the three regions of different G + C composition revealed by means of a multi-scale wavelet plot. Similar results have been obtained when segmenting all human chromosome sequences, showing the existence of previously unknown huge compositional superstructures in the human genome.
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Affiliation(s)
| | - J.L. Oliver
- Dpto. de Genética, Inst. de Biotecnología, Universidad de Granada, 18071 Granada, Spain
| | - M. Hackenberg
- Dpto. de Genética, Inst. de Biotecnología, Universidad de Granada, 18071 Granada, Spain
| | - A.V. Coronado
- Dpto. de Física Aplicada II, Universidad de Málaga, 29071 Málaga, Spain
| | - P.Ch. Ivanov
- Harvard Medical School, Division of Sleep Medicine, Brigham & Women’s Hospital, 02115 Boston, MA, USA
- Department of Physics and Center for Polymer Studies, Boston University, 2215 Boston, MA, USA
- Institute of Solid State Physics, Bulgarian Academy of Sciences, 1784 Sofia, Bulgaria
| | - P. Carpena
- Dpto. de Física Aplicada II, Universidad de Málaga, 29071 Málaga, Spain
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7
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Carpena P, Oliver JL, Hackenberg M, Coronado AV, Barturen G, Bernaola-Galván P. High-level organization of isochores into gigantic superstructures in the human genome. Phys Rev E Stat Nonlin Soft Matter Phys 2011; 83:031908. [PMID: 21517526 DOI: 10.1103/physreve.83.031908] [Citation(s) in RCA: 11] [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] [Received: 05/28/2010] [Revised: 01/10/2011] [Indexed: 05/30/2023]
Abstract
Human DNA shows a complex structure with compositional features at many scales; the isochores--long DNA segments (~10⁵ bp) of relatively homogeneous guanine-cytosine (G + C) content--are the largest well-documented and well-analyzed compositional structures. However, we report here on the existence of a high-level compositional organization of isochores in the human genome. By using a segmentation algorithm incorporating the long-range correlations existing in human DNA, we find that every chromosome is composed of a few huge segments (~ 10⁷ bp) of relatively homogeneous G + C content, which become the largest compositional organization of the genome. Finally, we show evidence of the biological relevance of these superstructures, pointing to a large-scale functional organization of the human genome.
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Affiliation(s)
- P Carpena
- Departamento de Física Aplicada II, Universidad de Málaga, ES-29071, Málaga, Spain.
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8
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Carpena P, Bernaola-Galván P, Hackenberg M, Coronado AV, Oliver JL. Level statistics of words: finding keywords in literary texts and symbolic sequences. Phys Rev E Stat Nonlin Soft Matter Phys 2009; 79:035102. [PMID: 19392005 DOI: 10.1103/physreve.79.035102] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2008] [Indexed: 05/27/2023]
Abstract
Using a generalization of the level statistics analysis of quantum disordered systems, we present an approach able to extract automatically keywords in literary texts. Our approach takes into account not only the frequencies of the words present in the text but also their spatial distribution along the text, and is based on the fact that relevant words are significantly clustered (i.e., they self-attract each other), while irrelevant words are distributed randomly in the text. Since a reference corpus is not needed, our approach is especially suitable for single documents for which no a priori information is available. In addition, we show that our method works also in generic symbolic sequences (continuous texts without spaces), thus suggesting its general applicability.
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Affiliation(s)
- P Carpena
- Departamento de Física Aplicada II, Universidad de Málaga, 29071 Málaga, Spain
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9
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Carpena P, Bernaola-Galván P, Coronado AV, Hackenberg M, Oliver JL. Identifying characteristic scales in the human genome. Phys Rev E Stat Nonlin Soft Matter Phys 2007; 75:032903. [PMID: 17500745 DOI: 10.1103/physreve.75.032903] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2006] [Indexed: 05/15/2023]
Abstract
The scale-free, long-range correlations detected in DNA sequences contrast with characteristic lengths of genomic elements, being particularly incompatible with the isochores (long, homogeneous DNA segments). By computing the local behavior of the scaling exponent alpha of detrended fluctuation analysis (DFA), we discriminate between sequences with and without true scaling, and we find that no single scaling exists in the human genome. Instead, human chromosomes show a common compositional structure with two characteristic scales, the large one corresponding to the isochores and the other to small and medium scale genomic elements.
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Affiliation(s)
- P Carpena
- Departamento de Física Aplicada II, Universidad de Málaga, 29071 Málaga, Spain
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Chwalisz K, Fahrenholz F, Hackenberg M, Garfield R, Elger W. The progesterone antagonist onapristone increases the effectiveness of oxytocin to produce delivery without changing the myometrial oxytocin receptor concentrations. Am J Obstet Gynecol 1991; 165:1760-70. [PMID: 1661070 DOI: 10.1016/0002-9378(91)90030-u] [Citation(s) in RCA: 35] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The progesterone antagonist onapristone was used in guinea pigs during late pregnancy (43 +/- 2 days after coitus) and before term (day 61 after coitus) to investigate the role of progesterone on uterine reactivity to exogenous oxytocin, concentration of oxytocin receptors, and gap junctions in the myometrium. Onapristone priming increased the ability of oxytocin to induce delivery during late pregnancy and before term by factors of greater than or equal to 30 and approximately 10, respectively. The intrauterine pressure recording on day 43 after coitus revealed phasic, laborlike contractions in response to oxytocin in onapristone-treated animals, in contrast to tonic reactions in controls. The increase in the oxytocin response in onapristone-treated animals was not associated with an increase in myometrial oxytocin receptor concentrations either during late pregnancy or before term. By contrast, treatment with onapristone significantly decreased the input resistance of myometrial cells in guinea pigs in late pregnancy (43 +/- 1 day after coitus) to the level of animals at term. This was associated with a marked increase in myometrial gap junctions stained with antibodies against connexin 43. These results indicate that progesterone may control myometrial reactivity to oxytocin in pregnant guinea pigs by effects on postreceptor events mainly by suppressing the gap junctions.
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Affiliation(s)
- K Chwalisz
- Research Laboratories of Schering AG, Berlin, Germany
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Kojro E, Hackenberg M, Zsigo J, Fahrenholz F. Identification and enzymatic deglycosylation of the myometrial oxytocin receptor using a radioiodinated photoreactive antagonist. J Biol Chem 1991; 266:21416-21. [PMID: 1657965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
To identify and characterize oxytocin receptors, a 125I-labeled photoreactive oxytocin antagonist was synthesized. The specific oxytocin antagonist [1-(beta-mercapto-beta,beta- cyclopentamethylenepropionic acid), 2-O-methyltyrosine,4-threonine,8- ornithine,9-tyrosylamide]oxytocin ([Mca,Tyr(O-Me)2,Thr4,Orn8,Tyr9-NH2]oxytocin) described by Elands et al. (Elands, J., Barberis, C., Jard, S., Tribollet, E., Dreifuss, J.-J., Bankowski, K., Manning, M., and Sawyer, W. H. (1987) Eur. J. Pharmacol. 147, 192-207) bound to the guinea pig uterine oxytocin receptor with high affinity (apparent Kd = 0.74 nM). The introduction of a 4-azidophenylamidino group at Orn8 resulted in the photoreactive ligand [Mca1,Tyr(O-Me)2,Thr4,Orn(4-azidophenylamidino)8,Tyr9- NH2]oxytocin, which retained the high binding affinity (Kd = 0.69 nM) of the parent compound. The photoreactive antagonist monoiodinated at Tyr9 had approximately double (Kd = 0.39 nM) the affinity of the photoreactive antagonist and several times that of oxytocin (Kd = 2.6 nM) for the guinea pig uterine oxytocin receptor. In photo-affinity labeling experiments using myometrial membranes obtained from guinea pigs during late pregnancy, the 125I-labeled photoreactive antagonist specifically labeled a protein with an apparent molecular mass of between 68 and 80 kDa: the labeling of this protein was completely suppressed by a 100-fold molar excess of oxytocin and oxytocin receptor-specific agonists, but not by vasopressin analogues specific for V1 or V2 receptors or by other peptide hormones. The ability of oxytocin to suppress labeling was decreased in the presence of guanosine 5'-O-(thiotriphosphate) or in the absence of Mn2+. Digestion of the photolabeled oxytocin receptor with endoglycosidase F gave rise to a protein with an apparent molecular mass of 38 +/- 2 kDa. The endoglycosidase F effect and the lack of endoglycosidase H action show that the myometrial oxytocin receptor is highly glycosylated with asparagine-linked complex oligosaccharide chains. Our results suggest that the radioiodinated photoreactive oxytocin antagonist could be a helpful tool in the isolation and further characterization of the oxytocin receptor.
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Affiliation(s)
- E Kojro
- Max-Planck-Institut für Biophysik, Frankfurt am Main, Federal Republic of Germany
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Kojro E, Hackenberg M, Zsigo J, Fahrenholz F. Identification and enzymatic deglycosylation of the myometrial oxytocin receptor using a radioiodinated photoreactive antagonist. J Biol Chem 1991. [DOI: 10.1016/s0021-9258(18)54654-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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13
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Abstract
The specific binding of [3H]oxytoxin to uterine membrane preparations derived from different species at late pregnancy was examined. The highest receptor density (bmax value) was found in membranes derived from the myometria of guinea pigs between day 60 post-conception (bmax = 3.6 +/- 0.1 pmol/mg) and day 65 (bmax = 4.4 +/- 0.1 pmol/mg). The similarity of Kd values for oxytocin binding (Kd = 2.6 +/- 0.2 nM) and for vasopressin binding (Kd = 2.1 +/- 0.4 nM) to the same membranes derived from a guinea pig myometrium indicate a homogeneous population of high-affinity binding sites which do not discriminate between these two hormones. Competitive binding experiments with specific oxytocin agonists containing either sarcosine or N-methylalanine in the place of Pro7 demonstrated that these myometrial receptors have the pharmacological properties of oxytocin receptors. The analogue of 1-deamino-[8-lysine]vasopressin containing a photoreactive azidophenylamidino group at the sidechain of Lys8 retained roughly the same receptor affinity as oxytocin. In photoaffinity labelling experiments with the tritium-labelled analogue a membrane protein from guinea pig myometrium with an apparent relative molecular mass Mr of 78,000 +/- 5000 (n = 13) was preferentially labelled. The labelling of this protein was completely suppressed by a 100-fold molar excess of either oxytocin, or [Sar7]oxytocin or [Thr4, Sar7]oxytocin, but not by other peptide hormones. These results provide evidence that the labelled 78,000-Mr protein is a myometrial oxytocin-receptor protein.
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Affiliation(s)
- F Fahrenholz
- Max-Planck-Institut für Biophysik, Frankfurt, Federal Republic of Germany
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Hackenberg M. [Jaw maldevelopment due to loss of deciduous teeth]. Zahnarztl Mitt 1982; 72:1580-4. [PMID: 6960603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Hackenberg M. [General-curriculum school format impedes youth dental services]. Zahnarztl Mitt 1981; 71:888-93. [PMID: 6946654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Hackenberg M. [Chronological relation of the second dentition to the occurrence of dental caries]. Offentl Gesundheitswes 1981; 43:237-40. [PMID: 6455619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Greinemann H, Hackenberg M. [Experience with immobilising plastic bandages, in particular with the baycast cast (author's transl)]. Unfallheilkunde 1981; 84:69-75. [PMID: 7193933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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18
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Hackenberg M. [Modern media for school dentistry]. Zahnarztl Mitt 1978; 68:771-7. [PMID: 79276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Hackenberg M. [Necessary emphasis on close dental care in the Pedodontic Service. Study on the behavior of defaulters during the time free of examination]. Offentl Gesundheitswes 1971; 33:698-706. [PMID: 4257546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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