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Ho WY, Chak LL, Hor JH, Liu F, Diaz-Garcia S, Chang JC, Sanford E, Rodriguez MJ, Alagappan D, Lim SM, Cho YL, Shimizu Y, Sun AX, Tyan SH, Koo E, Kim SH, Ravits J, Ng SY, Okamura K, Ling SC. FUS-dependent microRNA deregulations identify TRIB2 as a druggable target for ALS motor neurons. iScience 2023; 26:108152. [PMID: 37920668 PMCID: PMC10618709 DOI: 10.1016/j.isci.2023.108152] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 09/21/2023] [Accepted: 10/03/2023] [Indexed: 11/04/2023] Open
Abstract
MicroRNAs (miRNAs) modulate mRNA expression, and their deregulation contributes to various diseases including amyotrophic lateral sclerosis (ALS). As fused in sarcoma (FUS) is a causal gene for ALS and regulates biogenesis of miRNAs, we systematically analyzed the miRNA repertoires in spinal cords and hippocampi from ALS-FUS mice to understand how FUS-dependent miRNA deregulation contributes to ALS. miRNA profiling identified differentially expressed miRNAs between different central nervous system (CNS) regions as well as disease states. Among the up-regulated miRNAs, miR-1197 targets the pro-survival pseudokinase Trib2. A reduced TRIB2 expression was observed in iPSC-derived motor neurons from ALS patients. Pharmacological stabilization of TRIB2 protein with a clinically approved cancer drug rescues the survival of iPSC-derived human motor neurons, including those from a sporadic ALS patient. Collectively, our data indicate that miRNA profiling can be used to probe the molecular mechanisms underlying selective vulnerability, and TRIB2 is a potential therapeutic target for ALS.
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Affiliation(s)
- Wan Yun Ho
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117549, Singapore
- Programs in Neuroscience and Behavioral Disorders, Duke-NUS Medical School, Singapore 169857, Singapore
| | - Li-Ling Chak
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117549, Singapore
- Temasek Lifesciences Laboratory, Singapore 117604, Singapore
| | - Jin-Hui Hor
- Institute of Molecular and Cellular Biology, A∗STAR Research Entities, 61 Biopolis Drive, Singapore 138673, Singapore
| | - Fujia Liu
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117549, Singapore
| | - Sandra Diaz-Garcia
- Department of Neurosciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - Jer-Cherng Chang
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117549, Singapore
| | - Emma Sanford
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117549, Singapore
| | - Maria J. Rodriguez
- Department of Neurosciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - Durgadevi Alagappan
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117549, Singapore
| | - Su Min Lim
- Department of Neurology, Biomedical Research Institute, Hanyang University College of Medicine, Seoul 04763, Republic of Korea
| | - Yik-Lam Cho
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117549, Singapore
| | - Yuji Shimizu
- Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
| | - Alfred Xuyang Sun
- Programs in Neuroscience and Behavioral Disorders, Duke-NUS Medical School, Singapore 169857, Singapore
| | - Sheue-Houy Tyan
- Department of Neurosciences, University of California, San Diego, La Jolla, CA 92093, USA
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117549, Singapore
| | - Edward Koo
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117549, Singapore
- Department of Neurosciences, University of California, San Diego, La Jolla, CA 92093, USA
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117549, Singapore
| | - Seung Hyun Kim
- Department of Neurology, Biomedical Research Institute, Hanyang University College of Medicine, Seoul 04763, Republic of Korea
| | - John Ravits
- Department of Neurosciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - Shi-Yan Ng
- Institute of Molecular and Cellular Biology, A∗STAR Research Entities, 61 Biopolis Drive, Singapore 138673, Singapore
| | - Katsutomo Okamura
- Temasek Lifesciences Laboratory, Singapore 117604, Singapore
- Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
- School of Biological Sciences, Nanyang Technological University, Singapore 639798, Singapore
| | - Shuo-Chien Ling
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117549, Singapore
- Programs in Neuroscience and Behavioral Disorders, Duke-NUS Medical School, Singapore 169857, Singapore
- Healthy Longevity Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117549, Singapore
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Valderrama Achury MD, Higuera SA, Forero JF, Jaimes CP, Guerrero-Chalela CE, Rodriguez MJ, Manrique FT, Barragan A, Zuluaga JD, Pino-Marin A, Medina HM. Mortality patterns among patients with restrictive cardiomyopathy referred for CMR in a tertiary care center in Latin-America. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.840] [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: 11/14/2022] Open
Abstract
Abstract
Background
Restrictive Cardiomyopathies (R-CMP) represent a wide array of conditions characterized by diastolic heart failure with important impairment in left ventricle filling pressures. These entities require different treatments, rendering etiological diagnosis a key component during the evaluation of these patients.
Purpose
Report the mortality of a select group of patients with R-CMP referred to CMR in a tertiary care center in Latin-America.
Methods
We analyzed all patients with CMR performed in our institution, including hospitalized and ambulatory patients, between 2016 and 2021. We extracted data of patients diagnosed by CMR with amyloidosis, hypertrophic cardiomyopathy (HCM), and endomyocardial fibrosis (EMF). All-cause mortality was extracted from national census data and analyzed using Kaplan-Meier survival estimates and log-rank test.
Results
Between June 1st, 2016, and December 31st, 2021, 5000 CMRs were performed at our institution. Among these, 317 (6.3%) patients were diagnosed with R-CMP by CMR as follows: 52 patients (16.4%) had amyloidosis, 250 patients had HCM (78.9%) and 15 patients (4.7%) had EMF. Of these, 40.7% were female (n=129), the median age was 63 yar-old (IQR 51–71) and 64.7% (n=205) were out-patients. At a mean follow-up of 33.3 months, there was a statistically significant difference in mortality between patients with amyloidosis (49,0%) and those with HCM and EMF (7,1% and 13,3%, respectively; P<0.001), as described in Figure 1.
Conclusions
R-CMP represent a meaningful percentage of patients referred for CMR in our institution with different survival rates. Amyloidosis patients had a significantly higher mortality rate compared to HCM and EMF, at a relatively short follow-up. Increased access to CMR in our region for optimal diagnosis and early treatment may optimize prognosis in these types of patients.
Funding Acknowledgement
Type of funding sources: Foundation. Main funding source(s): Self funding
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Affiliation(s)
| | - S A Higuera
- Instituto del Corazόn de Bucaramanga , Bucaramanga , Colombia
| | - J F Forero
- Foundation Cardioinfantil , Bogota , Colombia
| | - C P Jaimes
- Foundation Cardioinfantil , Bogota , Colombia
| | | | | | | | - A Barragan
- Foundation Cardioinfantil , Bogota , Colombia
| | - J D Zuluaga
- Foundation Cardioinfantil , Bogota , Colombia
| | - A Pino-Marin
- School of Medicine and Health Sciences. Universidad del Rosario , Bogotá , Colombia
| | - H M Medina
- Foundation Cardioinfantil , Bogota , Colombia
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Perez Akly MS, Vazquez C, Besada CH, Rodriguez MJ, Conde MF, Cajal AR, Peuchot VA, Dardik D, Baccanelli MM, Serra MM. Prevalence of Intracranial Aneurysms in Hereditary Hemorrhagic Telangiectasia: Report from a Single Reference Center. AJNR Am J Neuroradiol 2022; 43:844-849. [PMID: 35589139 DOI: 10.3174/ajnr.a7505] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 01/30/2022] [Accepted: 03/17/2022] [Indexed: 12/16/2022]
Abstract
BACKGROUND AND PURPOSE Neurologic manifestations in hereditary hemorrhagic telangiectasia include an increased incidence of brain abscesses and ischemic strokes due to paradoxic embolization in addition to a wide spectrum of symptoms and complications due to typical brain vascular malformations. Intracranial aneurysms are not part of this brain vascular malformation spectrum. The aim of this study was to determine their prevalence in patients with hereditary hemorrhagic telangiectasia. MATERIALS AND METHODS This was a single-center, retrospective study. Adult patients from the institutional Hereditary Hemorrhagic Telangiectasia registry with a definitive diagnosis of hereditary hemorrhagic telangiectasia and an available report or angiographic imaging study were included and reviewed to determine the intracranial aneurysm prevalence. In addition, the morphologic characteristics of intracranial aneurysms and possible associated risk factors were collected. RESULTS Two hundred twenty-eight patients were analyzed. Thirty-seven aneurysms in 33 patients (14.5%; 95% CI, 9.9%-19%) were found. The median diameter of intracranial aneurysms was 3.2 mm (interquartile range, 2.6-4.4 mm). No association between intracranial aneurysm and sex, age, or genetic background was noted. There were no subarachnoid hemorrhagic events due to intracranial aneurysm rupture. CONCLUSIONS Due to the high prevalence of intracranial aneurysms in adult patients with hereditary hemorrhagic telangiectasia, further studies regarding bleeding risks and monitoring should be addressed.
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Affiliation(s)
- M S Perez Akly
- From the Department of Radiology (M.S.P.A., C.H.B., M.J.R., C.M.F.), Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
- A.R.G. Argentine Rendu Study Group (M.S.P.A., C.V., C.H.B., A.R.C., VA.P., D.D., M.M.B., M.M.S.), Buenos Aires, Argentina
- Hereditary Hemorrhagic Telangiectasia Unit (M.S.P.A., C.H.B., A.R.C., M.M.B., M.M.S.) Hospital Italiano, Buenos Aires, Argentina
| | - C Vazquez
- A.R.G. Argentine Rendu Study Group (M.S.P.A., C.V., C.H.B., A.R.C., VA.P., D.D., M.M.B., M.M.S.), Buenos Aires, Argentina
- Department of Internal Medicine (C.V., M.M.S.), Hospital Italiano, Buenos Aires, Argentina
| | - C H Besada
- From the Department of Radiology (M.S.P.A., C.H.B., M.J.R., C.M.F.), Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
- A.R.G. Argentine Rendu Study Group (M.S.P.A., C.V., C.H.B., A.R.C., VA.P., D.D., M.M.B., M.M.S.), Buenos Aires, Argentina
- Hereditary Hemorrhagic Telangiectasia Unit (M.S.P.A., C.H.B., A.R.C., M.M.B., M.M.S.) Hospital Italiano, Buenos Aires, Argentina
| | - M J Rodriguez
- From the Department of Radiology (M.S.P.A., C.H.B., M.J.R., C.M.F.), Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - M F Conde
- From the Department of Radiology (M.S.P.A., C.H.B., M.J.R., C.M.F.), Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - A R Cajal
- A.R.G. Argentine Rendu Study Group (M.S.P.A., C.V., C.H.B., A.R.C., VA.P., D.D., M.M.B., M.M.S.), Buenos Aires, Argentina
- Hereditary Hemorrhagic Telangiectasia Unit (M.S.P.A., C.H.B., A.R.C., M.M.B., M.M.S.) Hospital Italiano, Buenos Aires, Argentina
- Translational Medicine and Biomedical Engineering Institute (A.R.C.), Buenos Aires, Argentina
- University Institute (A.R.C., M.M.B., M.M.S.), Hospital Italiano, Buenos Aires, Argentina
| | - V A Peuchot
- A.R.G. Argentine Rendu Study Group (M.S.P.A., C.V., C.H.B., A.R.C., VA.P., D.D., M.M.B., M.M.S.), Buenos Aires, Argentina
- Internal Medicine Research Area (V.A.P.), Hospital Italiano, Buenos Aires, Argentina
| | - D Dardik
- A.R.G. Argentine Rendu Study Group (M.S.P.A., C.V., C.H.B., A.R.C., VA.P., D.D., M.M.B., M.M.S.), Buenos Aires, Argentina
- From the Department of Radiology (D.D.), Clínica Instituto de Diagnóstico Sociedad Anónima (INDISA), Santiago, Chile
| | - M M Baccanelli
- A.R.G. Argentine Rendu Study Group (M.S.P.A., C.V., C.H.B., A.R.C., VA.P., D.D., M.M.B., M.M.S.), Buenos Aires, Argentina
- Department of Neurosurgery (M.M.B.), Hospital Italiano, Buenos Aires, Argentina
- Hereditary Hemorrhagic Telangiectasia Unit (M.S.P.A., C.H.B., A.R.C., M.M.B., M.M.S.) Hospital Italiano, Buenos Aires, Argentina
- University Institute (A.R.C., M.M.B., M.M.S.), Hospital Italiano, Buenos Aires, Argentina
| | - M M Serra
- A.R.G. Argentine Rendu Study Group (M.S.P.A., C.V., C.H.B., A.R.C., VA.P., D.D., M.M.B., M.M.S.), Buenos Aires, Argentina
- Department of Internal Medicine (C.V., M.M.S.), Hospital Italiano, Buenos Aires, Argentina
- Hereditary Hemorrhagic Telangiectasia Unit (M.S.P.A., C.H.B., A.R.C., M.M.B., M.M.S.) Hospital Italiano, Buenos Aires, Argentina
- University Institute (A.R.C., M.M.B., M.M.S.), Hospital Italiano, Buenos Aires, Argentina
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Diaz-Garcia S, Ko VI, Vazquez-Sanchez S, Chia R, Arogundade OA, Rodriguez MJ, Traynor BJ, Cleveland D, Ravits J. Nuclear depletion of RNA-binding protein ELAVL3 (HuC) in sporadic and familial amyotrophic lateral sclerosis. Acta Neuropathol 2021; 142:985-1001. [PMID: 34618203 PMCID: PMC8568872 DOI: 10.1007/s00401-021-02374-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 09/20/2021] [Accepted: 09/21/2021] [Indexed: 11/07/2022]
Abstract
Amyotrophic lateral sclerosis is a progressive fatal neurodegenerative disease caused by loss of motor neurons and characterized neuropathologically in almost all cases by nuclear depletion and cytoplasmic aggregation of TDP-43, a nuclear RNA-binding protein (RBP). We identified ELAVL3 as one of the most downregulated genes in our transcriptome profiles of laser captured microdissection of motor neurons from sporadic ALS nervous systems and the most dysregulated of all RBPs. Neuropathological characterizations showed ELAVL3 nuclear depletion in a great percentage of remnant motor neurons, sometimes accompanied by cytoplasmic accumulations. These abnormalities were common in sporadic cases with and without intermediate expansions in ATXN2 and familial cases carrying mutations in C9orf72 and SOD1. Depletion of ELAVL3 occurred at both the RNA and protein levels and a short protein isoform was identified, but it is not related to a TDP-43-dependent cryptic exon in intron 3. Strikingly, ELAVL3 abnormalities were more frequent than TDP-43 abnormalities and occurred in motor neurons still with normal nuclear TDP-43 present, but all neurons with abnormal TDP-43 also had abnormal ELAVL3. In a neuron-like cell culture model using SH-SY5Y cells, ELAVL3 mislocalization occurred weeks before TDP-43 abnormalities were seen. We interrogated genetic databases, but did not identify association of ELAVL3 genetic structure with ALS. Taken together, these findings suggest that ELAVL3 is an important RBP in ALS pathogenesis acquired early and the neuropathological data suggest that it is involved by loss of function rather than cytoplasmic toxicity.
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Affiliation(s)
- Sandra Diaz-Garcia
- Department of Neurosciences, University of California, San Diego, La Jolla, CA 92093-0670 USA
| | - Vivian I. Ko
- Department of Neurosciences, University of California, San Diego, La Jolla, CA 92093-0670 USA
| | - Sonia Vazquez-Sanchez
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA 92093-0670 USA
- Ludwig Institute for Cancer Research, University of California at San Diego, La Jolla, CA USA
| | - Ruth Chia
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD 20892-3707 USA
| | | | - Maria J. Rodriguez
- Department of Neurosciences, University of California, San Diego, La Jolla, CA 92093-0670 USA
| | - Bryan J. Traynor
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD 20892-3707 USA
| | - Don Cleveland
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA 92093-0670 USA
- Ludwig Institute for Cancer Research, University of California at San Diego, La Jolla, CA USA
| | - John Ravits
- Department of Neurosciences, University of California, San Diego, La Jolla, CA 92093-0670 USA
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Tesfaye A, Rodríguez‐Nogales A, Benedé S, Fernández TD, Paris JL, Rodriguez MJ, Jiménez‐Sánchez IM, Bogas G, Mayorga C, Torres MJ, Montañez MI. Nanoarchitectures for efficient IgE cross-linking on effector cells to study amoxicillin allergy. Allergy 2021; 76:3183-3193. [PMID: 33784407 PMCID: PMC8518075 DOI: 10.1111/all.14834] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 02/28/2021] [Accepted: 03/14/2021] [Indexed: 12/19/2022]
Abstract
BACKGROUND Amoxicillin (AX) is nowadays the β-lactam that more frequently induces immediate allergic reactions. Nevertheless, diagnosis of AX allergy is occasionally challenging due to risky in vivo tests and non-optimal sensitivity of in vitro tests. AX requires protein haptenation to form multivalent conjugates with increased size to be immunogenic. Knowing adduct structural features for promoting effector cell activation would help to improve in vitro tests. We aimed to identify the optimal structural requirement in specific cellular degranulation to AX using well-precised nanoarchitectures of different lengths. METHOD We constructed eight Bidendron Antigens (BiAns) based on polyethylene glycol (PEG) linkers of different lengths (600-12,000 Da), end-coupled with polyamidoamine dendrons that were terminally multi-functionalized with amoxicilloyl (AXO). In vitro IgE recognition was studied by competitive radioallergosorbent test (RAST) and antibody-nanoarchitecture complexes by transmission electron microscopy (TEM). Their allergenic activity was evaluated using bone marrow-derived mast cells (MCs) passively sensitized with mouse monoclonal IgE against AX and humanized RBL-2H3 cells sensitized with polyclonal antibodies from sera of AX-allergic patients. RESULTS All BiAns were recognized by AX-sIgE. Dose-dependent activation responses were observed in both cellular assays, only with longer structures, containing spacers in the range of PEG 6000-12,000 Da. Consistently, greater proportion of immunocomplexes and number of antibodies per complex for longer BiAns were visualized by TEM. CONCLUSIONS BiAns are valuable platforms to study the mechanism of effector cell activation. These nanomolecular tools have demonstrated the importance of the adduct size to promote effector cell activation in AX allergy, which will impact for improving in vitro diagnostics.
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Affiliation(s)
- Amene Tesfaye
- Andalusian Centre for Nanomedicine and Biotechnology‐BIONANDMálagaSpain
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMAMálagaSpain
| | - Alba Rodríguez‐Nogales
- Andalusian Centre for Nanomedicine and Biotechnology‐BIONANDMálagaSpain
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMAMálagaSpain
| | - Sara Benedé
- Instituto de Investigación en Ciencias de la Alimentación (CIALCSIC‐UAM)MadridSpain
| | - Tahía D. Fernández
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMAMálagaSpain
- Departamento de Biología Celular Genética y FisiologíaFacultad de CienciasUniversidad de MálagaMálagaSpain
| | - Juan L. Paris
- Andalusian Centre for Nanomedicine and Biotechnology‐BIONANDMálagaSpain
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMAMálagaSpain
| | - Maria J. Rodriguez
- Andalusian Centre for Nanomedicine and Biotechnology‐BIONANDMálagaSpain
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMAMálagaSpain
| | - Isabel M. Jiménez‐Sánchez
- Andalusian Centre for Nanomedicine and Biotechnology‐BIONANDMálagaSpain
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMAMálagaSpain
| | - Gador Bogas
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMAMálagaSpain
- Allergy UnitHospital Regional Universitario de MálagaMálagaSpain
| | - Cristobalina Mayorga
- Andalusian Centre for Nanomedicine and Biotechnology‐BIONANDMálagaSpain
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMAMálagaSpain
- Allergy UnitHospital Regional Universitario de MálagaMálagaSpain
| | - María J. Torres
- Andalusian Centre for Nanomedicine and Biotechnology‐BIONANDMálagaSpain
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMAMálagaSpain
- Allergy UnitHospital Regional Universitario de MálagaMálagaSpain
- Departamento de MedicinaFacultad de MedicinaUniversidad de MálagaMálagaSpain
| | - María I. Montañez
- Andalusian Centre for Nanomedicine and Biotechnology‐BIONANDMálagaSpain
- Allergy Research GroupInstituto de Investigación Biomédica de Málaga‐IBIMAMálagaSpain
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Ho WY, Chang JC, Lim K, Cazenave-Gassiot A, Nguyen AT, Foo JC, Muralidharan S, Viera-Ortiz A, Ong SJM, Hor JH, Agrawal I, Hoon S, Arogundade OA, Rodriguez MJ, Lim SM, Kim SH, Ravits J, Ng SY, Wenk MR, Lee EB, Tucker-Kellogg G, Ling SC. TDP-43 mediates SREBF2-regulated gene expression required for oligodendrocyte myelination. J Cell Biol 2021; 220:212536. [PMID: 34347016 PMCID: PMC8348376 DOI: 10.1083/jcb.201910213] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 12/16/2020] [Accepted: 05/28/2021] [Indexed: 12/12/2022] Open
Abstract
Cholesterol metabolism operates autonomously within the central nervous system (CNS), where the majority of cholesterol resides in myelin. We demonstrate that TDP-43, the pathological signature protein for amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD), influences cholesterol metabolism in oligodendrocytes. TDP-43 binds directly to mRNA of SREBF2, the master transcription regulator for cholesterol metabolism, and multiple mRNAs encoding proteins responsible for cholesterol biosynthesis and uptake, including HMGCR, HMGCS1, and LDLR. TDP-43 depletion leads to reduced SREBF2 and LDLR expression, and cholesterol levels in vitro and in vivo. TDP-43-mediated changes in cholesterol levels can be restored by reintroducing SREBF2 or LDLR. Additionally, cholesterol supplementation rescues demyelination caused by TDP-43 deletion. Furthermore, oligodendrocytes harboring TDP-43 pathology from FTD patients show reduced HMGCR and HMGCS1, and coaggregation of LDLR and TDP-43. Collectively, our results indicate that TDP-43 plays a role in cholesterol homeostasis in oligodendrocytes, and cholesterol dysmetabolism may be implicated in TDP-43 proteinopathies-related diseases.
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Affiliation(s)
- Wan Yun Ho
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Jer-Cherng Chang
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Kenneth Lim
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Computational Biology Programme, Faculty of Science, National University of Singapore, Singapore
| | - Amaury Cazenave-Gassiot
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Singapore Lipidomics Incubator, Life Sciences Institute, National University of Singapore, Singapore
| | - Aivi T Nguyen
- Translational Neuropathology Research Laboratory, Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA
| | - Juat Chin Foo
- Singapore Lipidomics Incubator, Life Sciences Institute, National University of Singapore, Singapore
| | - Sneha Muralidharan
- Singapore Lipidomics Incubator, Life Sciences Institute, National University of Singapore, Singapore
| | - Ashley Viera-Ortiz
- Translational Neuropathology Research Laboratory, Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA
| | - Sarah J M Ong
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Jin Hui Hor
- Institute of Molecular and Cell Biology, A*STAR Research Entities, Singapore
| | - Ira Agrawal
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Shawn Hoon
- Molecular Engineering Laboratory, A*STAR Research Entities, Singapore
| | | | - Maria J Rodriguez
- Department of Neurosciences, University of California, San Diego, La Jolla, CA
| | - Su Min Lim
- Department of Neurology, and Biomedical Research Institute, Hanyang University College of Medicine, Seoul, South Korea.,Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - Seung Hyun Kim
- Department of Neurology, and Biomedical Research Institute, Hanyang University College of Medicine, Seoul, South Korea
| | - John Ravits
- Department of Neurosciences, University of California, San Diego, La Jolla, CA
| | - Shi-Yan Ng
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Institute of Molecular and Cell Biology, A*STAR Research Entities, Singapore
| | - Markus R Wenk
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Singapore Lipidomics Incubator, Life Sciences Institute, National University of Singapore, Singapore
| | - Edward B Lee
- Translational Neuropathology Research Laboratory, Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA
| | - Greg Tucker-Kellogg
- Computational Biology Programme, Faculty of Science, National University of Singapore, Singapore.,Department of Biological Sciences, National University of Singapore, Singapore
| | - Shuo-Chien Ling
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Healthy Longevity Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Program in Neuroscience and Behavior Disorders, Duke-National University of Singapore Medical School, Singapore
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7
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Rodriguez MJ, Gallo-Bernal S, Calixto CA, Medina L, Pardo EJ, Ocampo González M. Multiple Coronary Fistulas After Several Penetrating Chest Wounds: A Rare Case of Refractory Heart Failure. JACC Case Rep 2021; 3:34-38. [PMID: 34317464 PMCID: PMC8305110 DOI: 10.1016/j.jaccas.2020.08.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 08/18/2020] [Accepted: 08/21/2020] [Indexed: 11/29/2022]
Abstract
Coronary artery fistulas are rare coronary abnormalities. Most of these fistulas have a congenital origin, and only a few are acquired. We report the case of a patient with late-acquired multiple coronary fistulas secondary to a stab wound, diagnosed in the setting of ischemic heart failure secondary to coronary steal syndrome. (Level of Difficulty: Intermediate.)
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Affiliation(s)
- Maria J Rodriguez
- Division of Heart Failure, Fundación Cardioinfantil, Institute of Cardiology, Bogota, Colombia
| | - Sebastian Gallo-Bernal
- Division of Heart Failure, Fundación Cardioinfantil, Institute of Cardiology, Bogota, Colombia
| | - Camilo A Calixto
- Division of Heart Failure, Fundación Cardioinfantil, Institute of Cardiology, Bogota, Colombia
| | - Libardo Medina
- Universidad de Santander, Bucaramanga, Colombia.,Fundación Cardiovascular de Colombia, Bucaramanga, Colombia
| | | | - Mónica Ocampo González
- Universidad de Santander, Bucaramanga, Colombia.,Fundación Cardiovascular de Colombia, Bucaramanga, Colombia
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8
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Yang W, Sung K, Xu W, Rodriguez MJ, Wu AC, Santos SA, Fang S, Uber RK, Dong SX, Guillory BC, Orain X, Raus J, Jolivalt C, Calcutt N, Rissman RA, Ding J, Wu C. A missense point mutation in nerve growth factor (NGF R100W) results in selective peripheral sensory neuropathy. Prog Neurobiol 2020; 194:101886. [PMID: 32693191 DOI: 10.1016/j.pneurobio.2020.101886] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 09/26/2019] [Revised: 06/09/2020] [Accepted: 07/11/2020] [Indexed: 01/15/2023]
Abstract
The R100W mutation in nerve growth factor is associated with hereditary sensory autonomic neuropathy V in a Swedish family. These patients develop severe loss of perception to deep pain but with apparently normal cognitive functions. To better understand the disease mechanism, we examined a knockin mouse model of HSAN V. The homozygous mice showed significant structural deficits in intra-epidermal nerve fibers (IENFs) at birth. These mice had a total loss of pain perception at ∼2 months of age and often failed to survive to adulthood. Heterozygous mutant mice developed a progressive degeneration of small sensory fibers both behaviorally and functionally: they showed a progressive loss of IENFs starting at the age of 9 months accompanied with progressive loss of perception to painful stimuli such as noxious temperature. Quantitative analysis of lumbar 4/5 dorsal root ganglia revealed a significant reduction in small size neurons, while analysis of sciatic nerve fibers revealed the heterozygous mutant mice had no reduction in myelinated nerve fibers. Significantly, the amount of NGF secreted from mouse embryonic fibroblasts were reduced from both heterozygous and homozygous mice compared to their wild-type littermates. Interestingly, the heterozygous mice showed no apparent structural alteration in the brain: neither the anterior cingulate cortex nor the medial septum including NGF-dependent basal forebrain cholinergic neurons. Accordingly, these animals did not develop appreciable deficits in tests for brain function. Our study has thus demonstrated that the NGFR100W mutation likely affects the structure and function of peripheral sensory neurons.
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Affiliation(s)
- Wanlin Yang
- Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Department of Neurosciences, University of California San Diego, La Jolla, CA, USA; Department of Neurology, Zhuijiang Hospital, Southern Medical University, Guangzhou, China
| | - Kijung Sung
- Department of Neurosciences, University of California San Diego, La Jolla, CA, USA
| | - Wei Xu
- Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Maria J Rodriguez
- Department of Neurosciences, University of California San Diego, La Jolla, CA, USA; Department of Pathology, University of California San Diego, La Jolla, CA, USA
| | - Andrew C Wu
- Department of Neurosciences, University of California San Diego, La Jolla, CA, USA
| | - Sarai A Santos
- Department of Neurosciences, University of California San Diego, La Jolla, CA, USA
| | - Savannah Fang
- Department of Neurosciences, University of California San Diego, La Jolla, CA, USA
| | - Rebecca K Uber
- Department of Neurosciences, University of California San Diego, La Jolla, CA, USA
| | - Stephanie X Dong
- Department of Neurosciences, University of California San Diego, La Jolla, CA, USA
| | - Brandon C Guillory
- Department of Neurosciences, University of California San Diego, La Jolla, CA, USA
| | - Xavier Orain
- Department of Neurosciences, University of California San Diego, La Jolla, CA, USA
| | - Jordan Raus
- Department of Neurosciences, University of California San Diego, La Jolla, CA, USA
| | - Corrine Jolivalt
- Department of Pathology, University of California San Diego, La Jolla, CA, USA
| | - Nigel Calcutt
- Department of Pathology, University of California San Diego, La Jolla, CA, USA
| | - Robert A Rissman
- Department of Neurosciences, University of California San Diego, La Jolla, CA, USA; Veterans Affairs San Diego Healthcare System, San Diego, CA, USA
| | - Jianqing Ding
- Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chengbiao Wu
- Department of Neurosciences, University of California San Diego, La Jolla, CA, USA.
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9
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Zhu Q, Jiang J, Gendron TF, McAlonis-Downes M, Jiang L, Taylor A, Diaz Garcia S, Ghosh Dastidar S, Rodriguez MJ, King P, Zhang Y, La Spada AR, Xu H, Petrucelli L, Ravits J, Da Cruz S, Lagier-Tourenne C, Cleveland DW. Reduced C9ORF72 function exacerbates gain of toxicity from ALS/FTD-causing repeat expansion in C9orf72. Nat Neurosci 2020; 23:615-624. [PMID: 32284607 PMCID: PMC7384305 DOI: 10.1038/s41593-020-0619-5] [Citation(s) in RCA: 129] [Impact Index Per Article: 32.3] [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: 10/14/2019] [Accepted: 02/28/2020] [Indexed: 02/08/2023]
Abstract
Hexanucleotide expansions in C9orf72, which encodes a predicted guanine exchange factor, are the most frequent genetic cause of amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). Although repeat expansion has been established to generate toxic products, mRNAs encoding the C9ORF72 protein are also reduced in affected individuals. In this study, we tested how C9ORF72 protein levels affected repeat-mediated toxicity. In somatic transgenic mice expressing 66 GGGGCC repeats, inactivation of one or both endogenous C9orf72 alleles provoked or accelerated, respectively, early death. In mice expressing a C9orf72 transgene with 450 repeats that did not encode the C9ORF72 protein, inactivation of one or both endogenous C9orf72 alleles exacerbated cognitive deficits, hippocampal neuron loss, glial activation and accumulation of dipeptide-repeat proteins from translation of repeat-containing RNAs. Reduced C9ORF72 was shown to suppress repeat-mediated elevation in autophagy. These efforts support a disease mechanism in ALS/FTD resulting from reduced C9ORF72, which can lead to autophagy deficits, synergizing with repeat-dependent gain of toxicity.
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Affiliation(s)
- Qiang Zhu
- Ludwig Institute for Cancer Research, University of California at San Diego, La Jolla, CA, USA
| | - Jie Jiang
- Ludwig Institute for Cancer Research, University of California at San Diego, La Jolla, CA, USA
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA, USA
| | - Tania F Gendron
- Department of Neuroscience, Mayo Clinic, Jacksonville, FL, USA
| | - Melissa McAlonis-Downes
- Ludwig Institute for Cancer Research, University of California at San Diego, La Jolla, CA, USA
| | - Lulin Jiang
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA
| | - Amy Taylor
- Department of Neurosciences, University of California at San Diego, La Jolla, CA, USA
| | - Sandra Diaz Garcia
- Department of Neurosciences, University of California at San Diego, La Jolla, CA, USA
| | - Somasish Ghosh Dastidar
- Department of Pediatrics, University of California at San Diego, La Jolla, CA, USA
- Molecular Neuroscience; Kasturba Medical College, Manipal Academy of Higher Education, Manipal, India
| | - Maria J Rodriguez
- Department of Neurosciences, University of California at San Diego, La Jolla, CA, USA
| | - Patrick King
- Ludwig Institute for Cancer Research, University of California at San Diego, La Jolla, CA, USA
| | - Yongjie Zhang
- Department of Neuroscience, Mayo Clinic, Jacksonville, FL, USA
| | - Albert R La Spada
- Department of Pediatrics, University of California at San Diego, La Jolla, CA, USA
- Departments of Neurology, Neurobiology, and Cell Biology, Duke Center for Neurodegeneration and Neurotherapeutics, Duke University School of Medicine, Durham, NC, USA
| | - Huaxi Xu
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA
| | | | - John Ravits
- Department of Neurosciences, University of California at San Diego, La Jolla, CA, USA
| | - Sandrine Da Cruz
- Ludwig Institute for Cancer Research, University of California at San Diego, La Jolla, CA, USA
- VIB Center for Brain and Disease Research, Leuven, Belgium
- Department of Neurosciences, KU Leuven, Leuven, Belgium
| | - Clotilde Lagier-Tourenne
- Department of Neurology, The Sean M. Healey and AMG Center for ALS at Mass General, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
- Broad Institute of Harvard University and MIT, Cambridge, MA, USA.
| | - Don W Cleveland
- Ludwig Institute for Cancer Research, University of California at San Diego, La Jolla, CA, USA.
- Department of Neurosciences, University of California at San Diego, La Jolla, CA, USA.
- Department of Cellular and Molecular Medicine, University of California at San Diego, La Jolla, CA, USA.
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10
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Rodriguez MJ, Ramos-Soriano J, Perkins JR, Mascaraque A, Torres MJ, Gomez F, Diaz-Perales A, Rojo J, Mayorga C. Author Correction: Glycosylated nanostructures in sublingual immunotherapy induce long-lasting tolerance in LTP allergy mouse model. Sci Rep 2020; 10:6858. [PMID: 32300211 PMCID: PMC7162968 DOI: 10.1038/s41598-020-63855-2] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Maria J Rodriguez
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga-IBIMA, Málaga, Spain.,Medicine Department, Universidad de Málaga-UMA, Málaga, Spain
| | - Javier Ramos-Soriano
- Glycosystems Laboratory, Instituto de Investigaciones Químicas (IIQ), CSIC - Universidad de Sevilla, Sevilla, Spain
| | - James R Perkins
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga-IBIMA, Málaga, Spain
| | - Ainhoa Mascaraque
- Glycosystems Laboratory, Instituto de Investigaciones Químicas (IIQ), CSIC - Universidad de Sevilla, Sevilla, Spain
| | - Maria J Torres
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga-IBIMA, Málaga, Spain.,Medicine Department, Universidad de Málaga-UMA, Málaga, Spain.,Allergy Clinical Unit, Hospital Regional Universitario de Málaga, Málaga, Spain.,Nanostructures for Diagnosing and Treatment of Allergic Diseases Laboratory, Centro Andaluz de Nanomedicina y Biotecnología-BIONAND, Málaga, Spain
| | - Francisca Gomez
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga-IBIMA, Málaga, Spain.,Allergy Clinical Unit, Hospital Regional Universitario de Málaga, Málaga, Spain
| | | | - Javier Rojo
- Glycosystems Laboratory, Instituto de Investigaciones Químicas (IIQ), CSIC - Universidad de Sevilla, Sevilla, Spain
| | - Cristobalina Mayorga
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga-IBIMA, Málaga, Spain. .,Allergy Clinical Unit, Hospital Regional Universitario de Málaga, Málaga, Spain. .,Nanostructures for Diagnosing and Treatment of Allergic Diseases Laboratory, Centro Andaluz de Nanomedicina y Biotecnología-BIONAND, Málaga, Spain.
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11
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Jiang LL, Zhu B, Zhao Y, Li X, Liu T, Pina-Crespo J, Zhou L, Xu W, Rodriguez MJ, Yu H, Cleveland DW, Ravits J, Da Cruz S, Long T, Zhang D, Huang TY, Xu H. Membralin deficiency dysregulates astrocytic glutamate homeostasis leading to ALS-like impairment. J Clin Invest 2019; 129:3103-3120. [PMID: 31112137 DOI: 10.1172/jci127695] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Mechanisms underlying motor neuron degeneration in amyotrophic lateral sclerosis (ALS) are yet unclear. Specific deletion of the ER-component membralin in astrocytes manifested postnatal motor defects and lethality in mice, causing the accumulation of extracellular glutamate through reducing the glutamate transporter EAAT2. Restoring EAAT2 levels in membralin KO astrocytes limited astrocyte-dependent excitotoxicity in motor neurons. Transcriptomic profiles from mouse astrocytic membralin KO motor cortex indicated significant perturbation in KEGG pathway components related to ALS, including downregulation of Eaat2 and upregulation of Tnfrsf1a. Changes in gene expression with membralin deletion also overlapped with mouse ALS models and reactive astrocytes. Our results shown that activation of TNF receptor (TNFR1)-NFκB pathway known to suppress Eaat2 transcription was upregulated with membralin deletion. Further, reduced membralin and EAAT2 levels correlated with disease progression in spinal cord from SOD1-mutant mouse models, and reductions in membralin/EAAT2 were observed in human ALS spinal cord. Importantly, overexpression of membralin in SOD1G93A astrocytes decreased TNFR1 levels and increased EAAT2 expression, and improved motor neuron survival. Importantly, upregulation of membralin in SOD1G93A mice significantly prolonged mouse survival. Together, our study provided a mechanism for ALS pathogenesis where membralin limited glutamatergic neurotoxicity, suggesting that modulating membralin had potentials in ALS therapy.
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Affiliation(s)
- Lu-Lin Jiang
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Bing Zhu
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Yingjun Zhao
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Xiaoguang Li
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Tongfei Liu
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Juan Pina-Crespo
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Lisa Zhou
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Wenxi Xu
- Bioinformatics and Structural Biology Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Maria J Rodriguez
- Department of Neurosciences, UCSD, La Jolla, California, USA.,ALS Translational Research Program, Department of Neurosciences, UCSD, La Jolla, California, USA
| | - Haiyang Yu
- Ludwig Institute for Cancer Research, UCSD, La Jolla, California, USA
| | - Don W Cleveland
- Department of Neurosciences, UCSD, La Jolla, California, USA.,Ludwig Institute for Cancer Research, UCSD, La Jolla, California, USA.,Department of Cellular and Molecular Medicine, UCSD, La Jolla, California, USA
| | - John Ravits
- Department of Neurosciences, UCSD, La Jolla, California, USA.,ALS Translational Research Program, Department of Neurosciences, UCSD, La Jolla, California, USA
| | - Sandrine Da Cruz
- Ludwig Institute for Cancer Research, UCSD, La Jolla, California, USA
| | - Tao Long
- Bioinformatics and Structural Biology Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Dongxian Zhang
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Timothy Y Huang
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Huaxi Xu
- Neuroscience Initiative, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
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12
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Aladesuyi Arogundade O, Stauffer JE, Saberi S, Diaz-Garcia S, Malik S, Basilim H, Rodriguez MJ, Ohkubo T, Ravits J. Antisense RNA foci are associated with nucleoli and TDP-43 mislocalization in C9orf72-ALS/FTD: a quantitative study. Acta Neuropathol 2019; 137:527-530. [PMID: 30666413 PMCID: PMC6397670 DOI: 10.1007/s00401-018-01955-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2018] [Revised: 12/20/2018] [Accepted: 12/20/2018] [Indexed: 12/14/2022]
Affiliation(s)
| | - Jennifer E Stauffer
- Department of Neuroscience, University of California, San Diego, 9500 Gilman Drive, MS-0624, La Jolla, CA, 92093, USA
- The Jackson Laboratory, 600 Main St, Bar Harbor, ME, 04609, USA
| | - Shahram Saberi
- Department of Neuroscience, University of California, San Diego, 9500 Gilman Drive, MS-0624, La Jolla, CA, 92093, USA
- Department of Pathology, Icahn School of Medicine at Mount Sinai, 1 Gustave L. Levy Place, Box 1194, New York, NY, 10029, USA
| | - Sandra Diaz-Garcia
- Department of Neuroscience, University of California, San Diego, 9500 Gilman Drive, MS-0624, La Jolla, CA, 92093, USA
| | - Sahana Malik
- Department of Neuroscience, University of California, San Diego, 9500 Gilman Drive, MS-0624, La Jolla, CA, 92093, USA
- Cooper Medical School of Rowan University, 401 South Broadway, Camden, NJ, 08103, USA
| | - Hani Basilim
- Department of Neuroscience, University of California, San Diego, 9500 Gilman Drive, MS-0624, La Jolla, CA, 92093, USA
- King Abdullah Medical Complex Jeddah (KAMCJ), Ameer Naif Road, Al-Shera'a, Jidda, 23816, Saudi Arabia
| | - Maria J Rodriguez
- Department of Neuroscience, University of California, San Diego, 9500 Gilman Drive, MS-0624, La Jolla, CA, 92093, USA
| | - Takuya Ohkubo
- Department of Neuroscience, University of California, San Diego, 9500 Gilman Drive, MS-0624, La Jolla, CA, 92093, USA
| | - John Ravits
- Department of Neuroscience, University of California, San Diego, 9500 Gilman Drive, MS-0624, La Jolla, CA, 92093, USA.
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13
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Hernandez L, Merino B, Fico G, Alonso M, Rodriguez MJ, Ortuo-Soriano I, Fernandez-Del-Palacio E, Umpierrez MFC, Seara G, Arredondo MT. Definition and representation of a process to engineer a multi-user information management application for continuity of care. Annu Int Conf IEEE Eng Med Biol Soc 2018; 2018:4069-4072. [PMID: 30441250 DOI: 10.1109/embc.2018.8513368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
This article describes the procedure of definition and design of a process for the continuity care unit to improve the attention to the patient and his/her ecosystem providing a novel alternative to the conventional methods. This work was done under the framework of the MiniQ project, funded by EIT Health to improve the management of poly-medicated patients.
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14
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Behmel S, Damour M, Ludwig R, Rodriguez MJ. Participative approach to elicit water quality monitoring needs from stakeholder groups - An application of integrated watershed management. J Environ Manage 2018; 218:540-554. [PMID: 29709822 DOI: 10.1016/j.jenvman.2018.04.076] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 03/26/2018] [Accepted: 04/16/2018] [Indexed: 06/08/2023]
Abstract
Water quality monitoring programs (WQMPs) must be based on monitoring objectives originating from the real knowledge needs of all stakeholders in a watershed and users of the resource. This paper proposes a participative approach to elicit knowledge needs and preferred modes of communication from citizens and representatives of organized stakeholders (ROS) on water quality and quantity issues. The participative approach includes six steps and is adaptable and transferable to different types of watersheds. These steps are: (1) perform a stakeholder analysis; (2) conduct an adaptable survey accompanied by a user-friendly public participation geographical information system (PPGIS); (3) hold workshops to meet with ROS to inform them of the results of the survey and PPGIS; discuss attainment of past monitoring objectives; exchange views on new knowledge needs and concerns on water quality and quantity; (4) meet with citizens to obtain the same type of input (as from ROS); (5) analyze the data and information collected to identify new knowledge needs and modes of communication and (6) identify, in collaboration with the individuals in charge of the WQMPs, the short-, medium- and long-term monitoring objectives and communication strategies to be pursued. The participative approach was tested on two distinct watersheds in the province of Quebec, Canada. It resulted in a series of optimization objectives of the existing WQMPs, new monitoring objectives and recommendations regarding communication strategies of the WQMPs' results. The results of this study show that the proposed methodology is appreciated by all parties and that the outcomes and monitoring objectives are acceptable. We also conclude that successful integrated watershed management is a question of scale, and that every aspect of integrated watershed management needs to be adapted to the surface watershed, the groundwater watershed (aquifers) and the human catchment area.
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Affiliation(s)
- S Behmel
- École supérieure d'aménagement du territoire et de développement régional, Pavillon Félix-Antoine-Savard, bureau 1628; 2325, rue des Bibliothèques, Université Laval - Québec Québec G1V 0A6 Canada.
| | - M Damour
- École supérieure d'aménagement du territoire et de développement régional, Pavillon Félix-Antoine-Savard, bureau 1628; 2325, rue des Bibliothèques, Université Laval - Québec Québec G1V 0A6 Canada
| | - R Ludwig
- École supérieure d'aménagement du territoire et de développement régional, Pavillon Félix-Antoine-Savard, bureau 1628; 2325, rue des Bibliothèques, Université Laval - Québec Québec G1V 0A6 Canada
| | - M J Rodriguez
- École supérieure d'aménagement du territoire et de développement régional, Pavillon Félix-Antoine-Savard, bureau 1628; 2325, rue des Bibliothèques, Université Laval - Québec Québec G1V 0A6 Canada
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15
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Brown JE, Tozzi L, Schilling B, Kelmendi-Doko A, Truong AB, Rodriguez MJ, Gil ES, Sucsy R, Valentin JE, Philips BJ, Marra KG, Rubin JP, Kaplan DL. Biodegradable silk catheters for the delivery of therapeutics across anatomical repair sites. J Biomed Mater Res B Appl Biomater 2018; 107:501-510. [PMID: 29697188 DOI: 10.1002/jbm.b.34140] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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: 01/02/2018] [Revised: 02/28/2018] [Accepted: 03/14/2018] [Indexed: 12/20/2022]
Abstract
Biodegradable silk catheters for the delivery of therapeutics are designed with a focus on creating porous gradients that can direct the release of molecules away from the implantation site. Though suitable for a range of applications, these catheters are designed for drug delivery to transplanted adipose tissue in patients having undergone a fat grafting procedure. A common complication for fat grafts is the rapid reabsorption of large volume adipose transplants. In order to prolong volume retention, biodegradable catheters can be embedded into transplanted tissue to deliver nutrients, growth factors or therapeutics to improve adipocyte viability, proliferation, and ultimately extend volume retention. Two fabrication methods are developed: a silk gel-spinning technique, which uses a novel flash-freezing step to induce high porosity throughout the bulk of the tube, and a dip-coating process using silk protein solutions doped with a water soluble porogen. Increased porosity aids in the diffusion of drug through the silk tube in a controllable way. Additionally, we interface the porous tubes with ALZET osmotic pumps for implantation into a subcutaneous nude mouse model. The work described herein will discuss the processing parameters as well as the interfacing between pump and cargo therapeutic and the resulting release profiles. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2018. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 107B: 501-510, 2019.
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Affiliation(s)
- Joseph E Brown
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, 02155
| | - Lorenzo Tozzi
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, 02155
| | - Benjamin Schilling
- Department of Plastic Surgery, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, 15213
| | - Arta Kelmendi-Doko
- Department of Plastic Surgery, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, 15213
| | - April B Truong
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, 02155
| | - Maria J Rodriguez
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, 02155
| | - Eun Seok Gil
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, 02155
| | - Robert Sucsy
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, 02155
| | - Jolene E Valentin
- Department of Plastic Surgery, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, 15213
| | - Brian J Philips
- Department of Plastic Surgery, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, 15213
| | - Kacey G Marra
- Department of Plastic Surgery, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, 15213
| | - J Peter Rubin
- Department of Plastic Surgery, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, 15213
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, 02155
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16
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Rodriguez MJ, Dixon TA, Cohen E, Huang W, Omenetto FG, Kaplan DL. 3D freeform printing of silk fibroin. Acta Biomater 2018; 71:379-387. [PMID: 29550442 DOI: 10.1016/j.actbio.2018.02.035] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [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: 11/23/2017] [Revised: 02/13/2018] [Accepted: 02/28/2018] [Indexed: 12/17/2022]
Abstract
Freeform fabrication has emerged as a key direction in printing biologically-relevant materials and structures. With this emerging technology, complex structures with microscale resolution can be created in arbitrary geometries and without the limitations found in traditional bottom-up or top-down additive manufacturing methods. Recent advances in freeform printing have used the physical properties of microparticle-based granular gels as a medium for the submerged extrusion of bioinks. However, most of these techniques require post-processing or crosslinking for the removal of the printed structures (Miller et al., 2015; Jin et al., 2016) [1,2]. In this communication, we introduce a novel method for the one-step gelation of silk fibroin within a suspension of synthetic nanoclay (Laponite) and polyethylene glycol (PEG). Silk fibroin has been used as a biopolymer for bioprinting in several contexts, but chemical or enzymatic additives or bulking agents are needed to stabilize 3D structures. Our method requires no post-processing of printed structures and allows for in situ physical crosslinking of pure aqueous silk fibroin into arbitrary geometries produced through freeform 3D printing. STATEMENT OF SIGNIFICANCE 3D bioprinting has emerged as a technology that can produce biologically relevant structures in defined geometries with microscale resolution. Techniques for fabrication of free-standing structures by printing into granular gel media has been demonstrated previously, however, these methods require crosslinking agents and post-processing steps on printed structures. Our method utilizes one-step gelation of silk fibroin within a suspension of synthetic nanoclay (Laponite), with no need for additional crosslinking compounds or post processing of the material. This new method allows for in situ physical crosslinking of pure aqueous silk fibroin into defined geometries produced through freeform 3D printing.
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Affiliation(s)
- Maria J Rodriguez
- Department of Biomedical Engineering, Tufts University, Medford, MA, USA
| | - Thomas A Dixon
- Department of Biomedical Engineering, Tufts University, Medford, MA, USA
| | - Eliad Cohen
- Biomedical Engineering Program, University of Massachusetts, Lowell, Lowell, MA, USA
| | - Wenwen Huang
- Department of Biomedical Engineering, Tufts University, Medford, MA, USA
| | | | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, MA, USA.
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17
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Saberi S, Stauffer JE, Jiang J, Garcia SD, Taylor AE, Schulte D, Ohkubo T, Schloffman CL, Maldonado M, Baughn M, Rodriguez MJ, Pizzo D, Cleveland D, Ravits J. Sense-encoded poly-GR dipeptide repeat proteins correlate to neurodegeneration and uniquely co-localize with TDP-43 in dendrites of repeat-expanded C9orf72 amyotrophic lateral sclerosis. Acta Neuropathol 2018; 135:459-474. [PMID: 29196813 PMCID: PMC5935138 DOI: 10.1007/s00401-017-1793-8] [Citation(s) in RCA: 129] [Impact Index Per Article: 21.5] [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: 08/15/2017] [Revised: 11/25/2017] [Accepted: 11/26/2017] [Indexed: 12/12/2022]
Abstract
Hexanucleotide repeat expansions in C9orf72 are the most common genetic cause of amyotrophic lateral sclerosis (C9 ALS). The main hypothesized pathogenic mechanisms are C9orf72 haploinsufficiency and/or toxicity from one or more of bi-directionally transcribed repeat RNAs and their dipeptide repeat proteins (DPRs) poly-GP, poly-GA, poly-GR, poly-PR and poly-PA. Recently, nuclear import and/or export defects especially caused by arginine-containing poly-GR or poly-PR have been proposed as significant contributors to pathogenesis based on disease models. We quantitatively studied and compared DPRs, nuclear pore proteins and C9orf72 protein in clinically related and clinically unrelated regions of the central nervous system, and compared them to phosphorylated TDP-43 (pTDP-43), the hallmark protein of ALS. Of the five DPRs, only poly-GR was significantly abundant in clinically related areas compared to unrelated areas (p < 0.001), and formed dendritic-like aggregates in the motor cortex that co-localized with pTDP-43 (p < 0.0001). While most poly-GR dendritic inclusions were pTDP-43 positive, only 4% of pTDP-43 dendritic inclusions were poly-GR positive. Staining for arginine-containing poly-GR and poly-PR in nuclei of neurons produced signals that were not specific to C9 ALS. We could not detect significant differences of nuclear markers RanGap, Lamin B1, and Importin β1 in C9 ALS, although we observed subtle nuclear changes in ALS, both C9 and non-C9, compared to control. The C9orf72 protein itself was diffusely expressed in cytoplasm of large neurons and glia, and nearly 50% reduced, in both clinically related frontal cortex and unrelated occipital cortex, but not in cerebellum. In summary, sense-encoded poly-GR DPR was unique, and localized to dendrites and pTDP43 in motor regions of C9 ALS CNS. This is consistent with new emerging ideas about TDP-43 functions in dendrites.
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Affiliation(s)
- Shahram Saberi
- Department of Neurosciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0624, USA
- Department of Pathology, Icahn School of Medicine at Mount Sinai, 1 Gustave L. Levy, Place Box 1194, New York, NY, 10029, USA
| | - Jennifer E Stauffer
- Department of Neurosciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0624, USA
- Jackson Laboratory, 600 Main St, Bar Harbor, ME, 04609, USA
| | - Jie Jiang
- Department of Neurosciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0624, USA
- Laboratory for Cell Biology, Ludwig Institute for Cancer Research, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0670, USA
| | - Sandra Diaz Garcia
- Department of Neurosciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0624, USA
| | - Amy E Taylor
- Department of Neurosciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0624, USA
| | - Derek Schulte
- Department of Neurosciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0624, USA
- NeuroPace, Inc, 455 N. Bernardo Ave, Mountain View, CA, 94043, USA
| | - Takuya Ohkubo
- Department of Neurosciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0624, USA
| | - Cheyenne L Schloffman
- Laboratory for Cell Biology, Ludwig Institute for Cancer Research, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0670, USA
| | - Marcus Maldonado
- Laboratory for Cell Biology, Ludwig Institute for Cancer Research, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0670, USA
| | - Michael Baughn
- Department of Cellular and Molecular Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA
| | - Maria J Rodriguez
- Department of Neurosciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0624, USA
| | - Don Pizzo
- Department of Pathology, University of California at San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA
| | - Don Cleveland
- Department of Cellular and Molecular Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA
- Laboratory for Cell Biology, Ludwig Institute for Cancer Research, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0670, USA
| | - John Ravits
- Department of Neurosciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0624, USA.
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Palomares F, Gomez F, Bogas G, Campo P, Perkins JR, Diaz-Perales A, Rodriguez MJ, Prieto A, Barber D, Torres MJ, Mayorga C. Immunological Changes Induced in Peach Allergy Patients with Systemic Reactions by Pru p 3 Sublingual Immunotherapy. Mol Nutr Food Res 2018; 62. [PMID: 29105313 DOI: 10.1002/mnfr.201700669] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 10/17/2017] [Indexed: 12/17/2022]
Abstract
SCOPE Sublingual immunotherapy using peach extract enriched in Pru p 3 (Pru p 3-enriched-SLIT) brings a new perspective to treating patients with allergy to lipid transfer proteins. We evaluate the immunological changes induced by Pru p 3-enriched-SLIT during one year. METHODS AND RESULTS Three groups are included: peach allergic patients who receive Pru p 3-enriched-SLIT, peach allergic untreated patients, and controls. Peripheral blood mononuclear cells are obtained before treatment and at different time-points. Monocyte-derived dendritic cells (moDCs) maturation and lymphocyte proliferation are assessed by flow cytometry. Data showed a significant reduction of moDCs maturation status during one year of treatment and an increase in PD-L1. Moreover, we observed a significant decrease of the Pru p 3-specific proliferation of effector cells and an increase in regulatory T (Treg) cells with higher PD-L1 expression and IL-10 production. These are observed in patients treated only. CONCLUSION Successful Pru p 3-enriched-SLIT is linked to an important immunosuppression of allergen-specific effector T cells, potentially due to an increase of allergen-specific Treg cells. These cellular changes are orchestrated by the activity of moDCs promoting the expression of PD-L1 that will participate in the regulatory response. These changes may serve as biomarkers during SLIT alongside other features such as IgE/IgG4 ratio.
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Affiliation(s)
- Francisca Palomares
- Research Laboratory, IBIMA-Regional University Hospital of Malaga-UMA, Malaga, Spain
| | - Francisca Gomez
- Allergy Unit, IBIMA-Regional University Hospital of Malaga-UMA, Malaga, Spain
| | - Gador Bogas
- Allergy Unit, IBIMA-Regional University Hospital of Malaga-UMA, Malaga, Spain
| | - Paloma Campo
- Allergy Unit, IBIMA-Regional University Hospital of Malaga-UMA, Malaga, Spain
| | - James Richard Perkins
- Research Laboratory, IBIMA-Regional University Hospital of Malaga-UMA, Malaga, Spain
| | - Araceli Diaz-Perales
- Centre for Plant Biotechnology and Genomics (UPM-INIA), Campus de Montegancedo, Pozuelo de Alarcón, Madrid, Spain
| | - Maria J Rodriguez
- Research Laboratory, IBIMA-Regional University Hospital of Malaga-UMA, Malaga, Spain
| | - Ana Prieto
- Pediatric Unit, Regional University Hospital of Malaga, Malaga, Spain
| | - Domingo Barber
- Institute for Applied Molecular Medicine (IMMA), School of Medicine, Universidad CEU San Pablo, Madrid, Spain
| | - María J Torres
- Allergy Unit, IBIMA-Regional University Hospital of Malaga-UMA, Malaga, Spain
| | - Cristobalina Mayorga
- Research Laboratory, IBIMA-Regional University Hospital of Malaga-UMA, Malaga, Spain.,Allergy Unit, IBIMA-Regional University Hospital of Malaga-UMA, Malaga, Spain
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19
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Gomez F, Bogas G, Gonzalez M, Campo P, Salas M, Diaz-Perales A, Rodriguez MJ, Prieto A, Barber D, Blanca M, Torres MJ, Mayorga C. The clinical and immunological effects of Pru p 3 sublingual immunotherapy on peach and peanut allergy in patients with systemic reactions. Clin Exp Allergy 2017; 47:339-350. [PMID: 28160513 DOI: 10.1111/cea.12901] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Revised: 12/30/2016] [Accepted: 01/03/2017] [Indexed: 01/07/2023]
Abstract
BACKGROUND The peach non-specific lipid transfer protein, Pru p 3, is the primary sensitizer in fruits and responsible for severe reactions in the Mediterranean area. Peach allergy is frequently associated with other allergies such as peanut. Therefore, it is important to assess how specific immunotherapy to Pru p 3 could affect both peach and peanut tolerance. OBJECTIVES To evaluate peach and peanut desensitization and immunological changes after 1 year of Pru p 3 sublingual immunotherapy (SLIT) in patients with systemic allergic reactions to peach and/or peanut. METHODS Forty-eight peach allergic patients, 36 treated with SLIT and 12 non-treated, were monitored for 12 months. Treated patients were subclassified as peanut allergic (Group A), sensitized (Group B) or tolerant (Group C). SLIT effect was evaluated by skin prick test (SPT) reactivity and food challenge. Immunological changes were evaluated by monitoring sIgE and sIgG4 levels and basophil reactivity. RESULTS After 1 year of SLIT, the weal area in SPT significantly decreased and a significant increase in peach threshold in treated patients was observed (P < 0.001). Patients in Group A showed a significant decrease in peanut SPT weal area and an increase in peanut threshold (P < 0.001). Immunological changes were observed in treated patients only, with a significant decrease in sIgE and a parallel increase in sIgG4, sIgG4/sIgE and basophil reactivity for both Pru p 3 and Ara h 9. CONCLUSIONS AND CLINICAL RELEVANCE After 1 year, Pru p 3 SLIT induces both desensitization and immunological changes not only for peach but also for other food allergens relevant in the induction of severe reactions such as peanut.
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Affiliation(s)
- F Gomez
- Allergy Unit, IBIMA-Regional University Hospital of Malaga, UMA, Spain
| | - G Bogas
- Allergy Unit, IBIMA-Regional University Hospital of Malaga, UMA, Spain
| | - M Gonzalez
- Research Laboratory, IBIMA-Regional University Hospital of Malaga, UMA, Malaga, Spain
| | - P Campo
- Allergy Unit, IBIMA-Regional University Hospital of Malaga, UMA, Spain
| | - M Salas
- Allergy Unit, IBIMA-Regional University Hospital of Malaga, UMA, Spain
| | - A Diaz-Perales
- Centre for Plant Biotechnology and Genomics (UPM-INIA), Pozuelo de Alarcón, Madrid, Spain
| | - M J Rodriguez
- Research Laboratory, IBIMA-Regional University Hospital of Malaga, UMA, Malaga, Spain
| | - A Prieto
- Pediatric Unit,-Regional University Hospital of Malaga, UMA, Malaga, Spain
| | - D Barber
- Institute for Applied Molecular Medicine (IMMA), School of Medicine, Universidad CEU San Pablo, Madrid, Spain
| | - M Blanca
- Allergy Unit, IBIMA-Regional University Hospital of Malaga, UMA, Spain
| | - M J Torres
- Allergy Unit, IBIMA-Regional University Hospital of Malaga, UMA, Spain
| | - C Mayorga
- Allergy Unit, IBIMA-Regional University Hospital of Malaga, UMA, Spain.,Research Laboratory, IBIMA-Regional University Hospital of Malaga, UMA, Malaga, Spain
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20
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Gonzalez M, Doña I, Palomares F, Campo P, Rodriguez MJ, Rondon C, Gomez F, Fernandez TD, Perkins JR, Escribese MM, Torres MJ, Mayorga C. Dermatophagoides pteronyssinus immunotherapy changes the T-regulatory cell activity. Sci Rep 2017; 7:11949. [PMID: 28931869 PMCID: PMC5607227 DOI: 10.1038/s41598-017-12261-2] [Citation(s) in RCA: 8] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 09/05/2017] [Indexed: 01/12/2023] Open
Abstract
Subcutaneous specific immunotherapy (SCIT) has been shown to modify the Dermatophagoides pteronissinus (DP) allergic response, characterized by generation of Treg cells. However, studies have reported no changes in the proportion of Treg cells after immunotherapy, indicating that the effects may be due to modifications in their regulatory activities. We aimed to determine whether Tregs generated by DP-SCIT can switch the allergic response to tolerant and study the involvement of suppressive cytokines on it. Twenty-four DP-allergic rhinitis patients were recruited, 16 treated with DP-SCIT and 8 untreated. Treg and T effector cells were isolated before and after DP-SCIT, and cocultured in different combinations with α-IL-10, α-TGF-β blocking antibodies and nDer p 1. Treg cells after DP-SCIT increased Th1 and decreased Th2 and Th9 proliferation. Similarly, they increased IL-10 and decreased IL-4 and IL-9-producing cells. α-IL-10 affected the activity of Treg cells obtained after DP-SCIT only. Finally, DP-specific IgG4 levels, Treg percentage and IL-10 production were correlated after DP-SCIT. These results demonstrate that DP-SCIT induces Treg cells with different suppressive activities. These changes could be mediated by IL-10 production and appear to play an important role in the induction of the tolerance response leading to a clinical improvement of symptoms.
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Affiliation(s)
- M Gonzalez
- Research Laboratory-Allergy Unit, IBIMA-Regional University Hospital of Malaga, UMA, Malaga, Spain
| | - I Doña
- Allergy Service, IBIMA-Regional University Hospital of Malaga, UMA, Malaga, Spain
| | - F Palomares
- Research Laboratory-Allergy Unit, IBIMA-Regional University Hospital of Malaga, UMA, Malaga, Spain
| | - P Campo
- Allergy Service, IBIMA-Regional University Hospital of Malaga, UMA, Malaga, Spain
| | - M J Rodriguez
- Research Laboratory-Allergy Unit, IBIMA-Regional University Hospital of Malaga, UMA, Malaga, Spain
| | - C Rondon
- Allergy Service, IBIMA-Regional University Hospital of Malaga, UMA, Malaga, Spain
| | - F Gomez
- Allergy Service, IBIMA-Regional University Hospital of Malaga, UMA, Malaga, Spain
| | - T D Fernandez
- Research Laboratory-Allergy Unit, IBIMA-Regional University Hospital of Malaga, UMA, Malaga, Spain
| | - J R Perkins
- Research Laboratory-Allergy Unit, IBIMA-Regional University Hospital of Malaga, UMA, Malaga, Spain
| | - M M Escribese
- Institute for Applied Molecular Medicine (IMMA), School of Medicine, Universidad CEU San Pablo, Madrid, Spain
- Basical Medical Sciences Department, Faculty of Medicine, CEU San Pablo University, Madrid, Spain
| | - M J Torres
- Allergy Service, IBIMA-Regional University Hospital of Malaga, UMA, Malaga, Spain
| | - C Mayorga
- Research Laboratory-Allergy Unit, IBIMA-Regional University Hospital of Malaga, UMA, Malaga, Spain.
- Allergy Service, IBIMA-Regional University Hospital of Malaga, UMA, Malaga, Spain.
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21
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Rodriguez MJ, Mascaraque A, Ramos-Soriano J, Torres MJ, Perkins JR, Gomez F, Garrido-Arandia M, Cubells-Baeza N, Andreu D, Diaz-Perales A, Rojo J, Mayorga C. Pru p 3-Epitope-based sublingual immunotherapy in a murine model for the treatment of peach allergy. Mol Nutr Food Res 2017; 61. [DOI: 10.1002/mnfr.201700110] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 05/11/2017] [Accepted: 05/17/2017] [Indexed: 12/31/2022]
Affiliation(s)
- Maria J. Rodriguez
- Research Laboratory; IBIMA; Regional University Hospital of Malaga; UMA; Malaga Spain
| | - Ainhoa Mascaraque
- Glycosystems Laboratory; Instituto de Investigaciones Químicas (IIQ); CSIC-Universidad de Sevilla; Sevilla Spain
| | - Javier Ramos-Soriano
- Glycosystems Laboratory; Instituto de Investigaciones Químicas (IIQ); CSIC-Universidad de Sevilla; Sevilla Spain
| | - Maria J. Torres
- Allergy Unit; IBIMA; Regional University Hospital of Malaga; UMA; Malaga Spain
| | - James R. Perkins
- Research Laboratory; IBIMA; Regional University Hospital of Malaga; UMA; Malaga Spain
| | - Francisca Gomez
- Allergy Unit; IBIMA; Regional University Hospital of Malaga; UMA; Malaga Spain
| | | | | | - David Andreu
- Department of Experimental and Health Sciences; Universitat Pompeu Fabra; Barcelona Spain
| | | | - Javier Rojo
- Glycosystems Laboratory; Instituto de Investigaciones Químicas (IIQ); CSIC-Universidad de Sevilla; Sevilla Spain
| | - Cristobalina Mayorga
- Research Laboratory; IBIMA; Regional University Hospital of Malaga; UMA; Malaga Spain
- Allergy Unit; IBIMA; Regional University Hospital of Malaga; UMA; Malaga Spain
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22
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Abstract
Cardiovascular diseases are the leading cause of mortality around the globe, and microvasculature replacements to help stem these diseases are not available. Additionally, some vascular surgeries needing small diameter vascular grafts present different performance requirements. In this work silk fibroin scaffolds based on silk/polyethylene oxide blends were developed as microtubes for vasculature needs and for different tissue regeneration times, mechanical properties and structural designs. Systems with 13, 14 and 15% silk alone or blended with 1 or 2% of polyethylene oxide (PEO) were used to generate porous microtubes using gel-spinning. Microtubes with inner diameters (ID) of 150-300 μm and 100 μm wall thickness were fabricated. The systems were assessed for porosity, mechanical properties, enzymatic degradability, and in vitro vascular endothelial cell attachment and metabolic activity. After 14 days all tubes supported the proliferation of cells and cell attachment increased with porosity. The silk tubes with PEO had similar crystallinity but higher elastic modulus compared with the systems without PEO. The silk (13%)/PEO (1%) system showed the highest porosity (20 μm pore diameters on average), highest cell attachment and fastest degradation profile. There was a good correlation between these parameters with silk concentration and the presence of PEO. The results demonstrate the ability to generate versatile and tunable tubular biomaterials based on silk-PEO-blends with potential for microvascular grafts.
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Affiliation(s)
- V E Bosio
- Institute of Applied Biotechnology CINDEFI (CCT La Plata-CONICET, U.N.L.P.), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Calle 47 y 115, 1900 La Plata, Argentina.,Department of Biomedical Engineering, Tufts University, Medford, MA02155, USA
| | - J Brown
- Department of Biomedical Engineering, Tufts University, Medford, MA02155, USA
| | - M J Rodriguez
- Department of Biomedical Engineering, Tufts University, Medford, MA02155, USA
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, MA02155, USA
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23
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Behmel S, Damour M, Ludwig R, Rodriguez MJ. Water quality monitoring strategies - A review and future perspectives. Sci Total Environ 2016; 571:1312-29. [PMID: 27396312 DOI: 10.1016/j.scitotenv.2016.06.235] [Citation(s) in RCA: 98] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 06/28/2016] [Accepted: 06/29/2016] [Indexed: 05/12/2023]
Abstract
The reliable assessment of water quality through water quality monitoring programs (WQMPs) is crucial in order for decision-makers to understand, interpret and use this information in support of their management activities aiming at protecting the resource. The challenge of water quality monitoring has been widely addressed in the literature since the 1940s. However, there is still no generally accepted, holistic and practical strategy to support all phases of WQMPs. The purpose of this paper is to report on the use cases a watershed manager has to address to plan or optimize a WQMP from the challenge of identifying monitoring objectives; selecting sampling sites and water quality parameters; identifying sampling frequencies; considering logistics and resources to the implementation of actions based on information acquired through the WQMP. An inventory and critique of the information, approaches and tools placed at the disposal of watershed managers was proposed to evaluate how the existing information could be integrated in a holistic, user-friendly and evolvable solution. Given the differences in regulatory requirements, water quality standards, geographical and geological differences, land-use variations, and other site specificities, a one-in-all solution is not possible. However, we advance that an intelligent decision support system (IDSS) based on expert knowledge that integrates existing approaches and past research can guide a watershed manager through the process according to his/her site-specific requirements. It is also necessary to tap into local knowledge and to identify the knowledge needs of all the stakeholders through participative approaches based on geographical information systems and adaptive survey-based questionnaires. We believe that future research should focus on developing such participative approaches and further investigate the benefits of IDSS's that can be updated quickly and make it possible for a watershed manager to obtain a timely, holistic view and support for every aspect of planning and optimizing a WQMP.
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Affiliation(s)
- S Behmel
- École supérieure d'aménagement du territoire et de développement régional, Pavillon Félix-Antoine-Savard, bureau 1628, 2325, rue des Bibliothèques, Université Laval, Québec, Québec G1V 0A6, Canada.
| | - M Damour
- DATALEA, 74 Avenue de Tivoli - Batiment C - 33110 Le Bouscat, France
| | - R Ludwig
- Ludwig Maximilians Universität, Lehrstuhl für Geographie und geographische Fernerkundung, Luisenstraße 37, 80333 München
| | - M J Rodriguez
- École supérieure d'aménagement du territoire et de développement régional, Pavillon Félix-Antoine-Savard, bureau 1628, 2325, rue des Bibliothèques, Université Laval, Québec, Québec G1V 0A6, Canada
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24
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Jose RR, Rodriguez MJ, Dixon TA, Omenetto F, Kaplan DL. Evolution of Bioinks and Additive Manufacturing Technologies for 3D Bioprinting. ACS Biomater Sci Eng 2016; 2:1662-1678. [DOI: 10.1021/acsbiomaterials.6b00088] [Citation(s) in RCA: 196] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Rod R. Jose
- Department of Biomedical
Engineering, 4 Colby Street, Tufts University, Medford, Massachusetts 02155, United States
| | - Maria J. Rodriguez
- Department of Biomedical
Engineering, 4 Colby Street, Tufts University, Medford, Massachusetts 02155, United States
| | - Thomas A. Dixon
- Department of Biomedical
Engineering, 4 Colby Street, Tufts University, Medford, Massachusetts 02155, United States
| | - Fiorenzo Omenetto
- Department of Biomedical
Engineering, 4 Colby Street, Tufts University, Medford, Massachusetts 02155, United States
| | - David L. Kaplan
- Department of Biomedical
Engineering, 4 Colby Street, Tufts University, Medford, Massachusetts 02155, United States
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25
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26
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Scheili A, Rodriguez MJ, Sadiq R. Seasonal and spatial variations of source and drinking water quality in small municipal systems of two Canadian regions. Sci Total Environ 2015; 508:514-524. [PMID: 25481717 DOI: 10.1016/j.scitotenv.2014.11.069] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Revised: 11/21/2014] [Accepted: 11/21/2014] [Indexed: 06/04/2023]
Abstract
A one-year sampling program covering twenty-five small municipal systems was carried out in two Canadian regions to improve our understanding of the variability of water quality in small systems from water source to the end of the distribution system (DS). The database obtained was used to develop a global portrait of physical, chemical and microbiological water quality parameters. More precisely, the temporal and the spatial variability of these parameters were investigated. We observed that the levels of natural organic matter (NOM) were variable during different seasons, with maxima in the fall for both provinces. In the regions under study, the highest trihalomethane (THM) and haloacetic acid (HAA) levels were achieved in warmer seasons (summer, fall), as observed in previous studies involving large systems. Observed THM and HAA levels were three times higher in systems in the province of Newfoundland & Labrador than in the province of Quebec. Taste and odor indicators were detected during the summer and fall, and higher heterotrophic plate count (HPC) levels were associated with lower free chlorine levels. To determine spatial variations, stepwise statistical analysis was used to identify parameters and locations in the DS that act as indicators of drinking water quality. As observed for medium and large systems, free chlorine consumption, THM and HAA levels were dependent on their location in the DS. We also observed that the degradation of HAAs is more important in small systems than in medium or large DS reported in the literature, and this degradation can occur from the beginning of the DS. The results of this research may contribute to providing precious information on drinking water quality to small system operators and pave the way for several opportunities to improve water quality management.
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Affiliation(s)
- A Scheili
- ESAD, Laval University, Quebec City, QC G1V 0A6, Canada
| | - M J Rodriguez
- ESAD, Laval University, Quebec City, QC G1V 0A6, Canada.
| | - R Sadiq
- School of Engineering, University of British Columbia, Kelowna, BC V1V 1V7, Canada
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Hollis ER, Ishiko N, Tolentino K, Doherty E, Rodriguez MJ, Calcutt NA, Zou Y. A novel and robust conditioning lesion induced by ethidium bromide. Exp Neurol 2014; 265:30-9. [PMID: 25541322 DOI: 10.1016/j.expneurol.2014.12.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [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: 07/16/2014] [Revised: 10/17/2014] [Accepted: 12/03/2014] [Indexed: 10/24/2022]
Abstract
Molecular and cellular mechanisms underlying the peripheral conditioning lesion remain unsolved. We show here that injection of a chemical demyelinating agent, ethidium bromide, into the sciatic nerve induces a similar set of regeneration-associated genes and promotes a 2.7-fold greater extent of sensory axon regeneration in the spinal cord than sciatic nerve crush. We found that more severe peripheral demyelination correlates with more severe functional and electrophysiological deficits, but more robust central regeneration. Ethidium bromide injection does not activate macrophages at the demyelinated sciatic nerve site, as observed after nerve crush, but briefly activates macrophages in the dorsal root ganglion. This study provides a new method for investigating the underlying mechanisms of the conditioning response and suggests that loss of the peripheral myelin may be a major signal to change the intrinsic growth state of adult sensory neurons and promote regeneration.
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Affiliation(s)
- Edmund R Hollis
- Neurobiology Section, Biological Sciences Division, University of California, San Diego, La Jolla, CA 92093, USA
| | - Nao Ishiko
- Neurobiology Section, Biological Sciences Division, University of California, San Diego, La Jolla, CA 92093, USA
| | - Kristine Tolentino
- Neurobiology Section, Biological Sciences Division, University of California, San Diego, La Jolla, CA 92093, USA
| | | | - Maria J Rodriguez
- Department of Pathology, University of California, San Diego, La Jolla, CA 92093, USA
| | - Nigel A Calcutt
- Department of Pathology, University of California, San Diego, La Jolla, CA 92093, USA
| | - Yimin Zou
- Neurobiology Section, Biological Sciences Division, University of California, San Diego, La Jolla, CA 92093, USA.
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Maheux AF, Boudreau DK, Bergeron MG, Rodriguez MJ. Characterization of Escherichia fergusonii and Escherichia albertii isolated from water. J Appl Microbiol 2014; 117:597-609. [PMID: 24849008 DOI: 10.1111/jam.12551] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [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: 02/14/2014] [Revised: 05/16/2014] [Accepted: 05/17/2014] [Indexed: 11/28/2022]
Abstract
AIMS The aim of this study was to characterize Escherichia fergusonii and Escherichia albertii isolated from water. METHODS AND RESULTS The characterization of E. fergusonii and E. albertii isolated from water was determined using an Escherichia coli-specific uidA PCR, a tuf PCR, and with phylogenetic analysis using three housekeeping genes (adk, gyrB, and recA) from the E. coli MLST scheme, selected for their ability to discriminate among all Escherichia species. Among the 527 isolates tested, 25 (4·7%) were uidA PCR negative and tuf PCR positive. Phylogenetic analysis using adk, gyrB and recA genes showed that 6, 18 and 1 of these 25 non-E. coli Escherichia spp. isolates grouped with reference strains of E. fergusonii, E. albertii, and E. coli, respectively. Finally, the 25 non-E. coli Escherichia spp. strains isolated were investigated for the presence of pathogenic factors, comprising intimin (eae gene), cytolethal distending toxin (cdtB gene) and shiga toxin (stx gene). With the PCR primers used, the presence of eae and stx genes was not detected. However, cdtB genes types I/IV were detected for 3 (16·7%) E. albertii strains, whereas 15 of 18 (83·3%) possessed the cdtB gene types II/III/V. CONCLUSIONS These results showed that MLST scheme allows a more accurate identification of non-E. coli species than phenotypic tests. We also showed that E. fergusonii and E. albertii represent, respectively, 0·8 and 2·5% of all Escherichia species isolated and the pathogenic cdtB genes were present in 83·3% of these strains. SIGNIFICANCE AND IMPACT OF THE STUDY The data presented in this study provided an efficient way to correctly identify non-E. coli species contributing to our understanding of the risks associated with Escherichia species in water consumed by humans and animals. Furthermore, the results give an insight about the natural habitats of these species.
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Affiliation(s)
- A F Maheux
- Chaire de recherche en eau potable de l'Université Laval, Québec City, QC, Canada; École supérieure d'aménagement du territoire et de développement régional, Université Laval, Québec City, QC, Canada
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Orriach Guerrero JL, Ramirez Fernandez A, Iglesias P, Galan M, Melero JM, Florez A, Escalona JJ, Rodriguez MJ, Ramirez M, Rubio M, Cruz J. Preoperative levosimendan. A new way for organoprotection. Curr Pharm Des 2014; 20:5476-83. [PMID: 24669969 DOI: 10.2174/1381612820666140325121452] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Accepted: 03/24/2014] [Indexed: 11/22/2022]
Abstract
Preoperative use of levosimendan in cardiac surgery patients is one of the most attractive therapeutic alternatives in subjects with left or right ventricular dysfunction. Our review explores the pharmacological bases and clinical evidence for the use of levosimendan, with the intention of making a series of recommendations regarding its use in preoperative optimization prior to cardiac surgery. We carried out a survey of 102 Spanish anesthesiologists in order to shed light on the grey areas regarding the use of this drug prior to surgery. Our findings suggest that levosimendan is recommended for patients with severe left or right ventricular dysfunction, moderate left ventricular dysfunction in which Intra-aortic Balloon Counterpulsation (IABC) is necessary and severe pulmonary hypertension. Administration of levosimendan prior to surgical cardiac intervention without an initial bolus reduces the likelihood of complications.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - J Cruz
- Department of anaesthesia. Hospital Virgen de la Victoria. Málaga. Spain.
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Larzabal L, de Aberasturi AL, Redrado M, Rueda P, Rodriguez MJ, Bodegas ME, Montuenga LM, Calvo A. TMPRSS4 regulates levels of integrin α5 in NSCLC through miR-205 activity to promote metastasis. Br J Cancer 2014; 110:764-74. [PMID: 24434435 PMCID: PMC3915125 DOI: 10.1038/bjc.2013.761] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 10/16/2013] [Accepted: 11/12/2013] [Indexed: 01/14/2023] Open
Abstract
Background: TMPRSS4 is a membrane-anchored protease involved in cell migration and invasion in different cancer types including lung cancer. TMPRSS4 expression is increased in NSCLC and its inhibition through shRNA reduces lung metastasis. However, molecular mechanisms leading to the protumorigenic regulation of TMPRSS4 in lung cancer are unknown. Methods: miR-205 was identified as an overexpressed gene upon TMPRSS4 downregulation through microarray analysis. Cell migration and invasion assays and in vivo lung primary tumour and metastasis models were used for functional analysis of miR-205 overexpression in H2170 and H441 cell lines. Luciferase assays were used to identify a new miR-205 direct target in NSCLC. Results: miR-205 overexpression promoted an epithelial phenotype with increased E-cadherin and reduced fibronectin. Furthermore, miR-205 expression caused a G0/G1 cell cycle arrest and inhibition of cell growth, migration, attachment to fibronectin, primary tumour growth and metastasis formation in vivo. Integrin α5 (a proinvasive protein) was identified as a new miR-205 direct target in NSCLC. Integrin α5 downregulation in lung cancer cells resulted in complete abrogation of cell migration, a decreased capacity to adhere to fibronectin and reduced in vivo tumour growth, compared with control cells. TMPRSS4 silencing resulted in a concomitant reduction of integrin α5 levels. Conclusion: We have demonstrated for the first time a new molecular pathway that connects TMPRSS4 and integrin α5 through miR-205 to regulate cancer cell invasion and metastasis. Our results will help designing new therapeutic strategies to inhibit this novel pathway in NSCLC.
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Affiliation(s)
- L Larzabal
- Division of Oncology, Center for Applied Medical Research, University of Navarra, Pamplona, Spain
| | - A L de Aberasturi
- 1] Division of Oncology, Center for Applied Medical Research, University of Navarra, Pamplona, Spain [2] Department of Histology and Pathology, University of Navarra, Pamplona, Spain
| | - M Redrado
- Division of Oncology, Center for Applied Medical Research, University of Navarra, Pamplona, Spain
| | | | | | - M E Bodegas
- Department of Histology and Pathology, University of Navarra, Pamplona, Spain
| | - L M Montuenga
- 1] Division of Oncology, Center for Applied Medical Research, University of Navarra, Pamplona, Spain [2] Department of Histology and Pathology, University of Navarra, Pamplona, Spain
| | - A Calvo
- 1] Division of Oncology, Center for Applied Medical Research, University of Navarra, Pamplona, Spain [2] Department of Histology and Pathology, University of Navarra, Pamplona, Spain
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Larzabal L, Redrado M, Lopez de Aberasturi A, Rueda P, Rodriguez MJ, Lopez L, Montuenga L, Calvo A. Abstract 2696: TMPRSS4 regulates levels of integrin alpha-5 in NSCLC through miR-205 activity. Cancer Res 2013. [DOI: 10.1158/1538-7445.am2013-2696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
TMPRSS4 is a membrane-anchored protease involved in cell migration and invasion in different cancer types including lung cancer. We have previously shown that TMPRSS4 expression is increased in NSCLC and that its inhibition through shRNA reduces lung metastasis. The goal of the present study was to elucidate molecular mechanisms involved in the protumorigenic role of TMPRSS4 in NSCLC. A knock down strategy and microarray analyses were established to identify genes regulated by TMPRSS4. Among other genes, miR-205 was identified as an overexpressed gene upon TMPRSS4 downregulation. Levels of miR-205 were found to be reduced in NSCLC cells compared to non-malignant cells. miR-205 overexpression promoted the acquisition of an epithelial phenotype with increased E-cadherin and reduced fibronectin expression, probably through the regulation of transcription factors ZEB1 and ZEB2. Furthermore, miR-205 inhibited very significantly (p<0.01) tumor cell migration, invasion and metastasis formation in vivo. A further transcriptional and luciferase assays in miR-205-overexpressing cells identified integrin alpha-5 (a proinvasive protein overexpressed in tumors) as a new miR-205 target in NSCLC. We have therefore demonstrated for the first time a new molecular connection between TMPRSS4 and integrin alpha-5 through miR-205.
Citation Format: Leyre Larzabal, Miriam Redrado, Arrate Lopez de Aberasturi, Paloma Rueda, Maria J. Rodriguez, Lissette Lopez, Luis Montuenga, Alfonso Calvo. TMPRSS4 regulates levels of integrin alpha-5 in NSCLC through miR-205 activity. [abstract]. In: Proceedings of the 104th Annual Meeting of the American Association for Cancer Research; 2013 Apr 6-10; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2013;73(8 Suppl):Abstract nr 2696. doi:10.1158/1538-7445.AM2013-2696
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Affiliation(s)
- Leyre Larzabal
- 1Foundation for Applied Medical Research, Pamplona, Spain
| | - Miriam Redrado
- 1Foundation for Applied Medical Research, Pamplona, Spain
| | | | | | | | | | - Luis Montuenga
- 1Foundation for Applied Medical Research, Pamplona, Spain
| | - Alfonso Calvo
- 1Foundation for Applied Medical Research, Pamplona, Spain
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Rodriguez MJ, Rodriguez A, Maranon R. Gram stain as a predictor of urinary infections in children under 2 years. Indian Pediatr 2011; 48:816-817. [PMID: 22080690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
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Mouly D, Joulin E, Rosin C, Beaudeau P, Zeghnoun A, Olszewski-Ortar A, Munoz JF, Welté B, Joyeux M, Seux R, Montiel A, Rodriguez MJ. Variations in trihalomethane levels in three French water distribution systems and the development of a predictive model. Water Res 2010; 44:5168-5179. [PMID: 20663536 DOI: 10.1016/j.watres.2010.06.028] [Citation(s) in RCA: 16] [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] [Received: 12/18/2009] [Revised: 06/09/2010] [Accepted: 06/11/2010] [Indexed: 05/29/2023]
Abstract
Epidemiological studies have demonstrated that chlorination by-products in drinking water may cause some types of cancer in humans. However, due to differences in methodology between the various studies, it is not possible to establish a dose-response relationship. This shortcoming is due primarily to uncertainties about how exposure is measured-made difficult by the great number of compounds present-the exposure routes involved and the variation in concentrations in water distribution systems. This is especially true for trihalomethanes for which concentrations can double between the water treatment plant and the consumer tap. The aim of this study is to describe the behaviour of trihalomethanes in three French water distribution systems and develop a mathematical model to predict concentrations in the water distribution system using data collected from treated water at the plant (i.e. the entrance of the distribution system). In 2006 and 2007, samples were taken successively from treated water at the plant and at several points in the water distribution system in three French cities. In addition to the concentrations of the four trihalomethanes (chloroform, dichlorobromomethane, chlorodibromomethane, bromoform), many other parameters involved in their formation that affect their concentration were also measured. The average trihalomethane concentration in the three water distribution systems ranged from 21.6 μg/L to 59.9 μg/L. The increase in trihalomethanes between the treated water at the plant and a given point in the water distribution system varied by a factor of 1.1-5.7 over all of the samples. A log-log linear regression model was constructed to predict THM concentrations in the water distribution system. The five variables used were trihalomethane concentration and free residual chlorine for treated water at the plant, two variables that characterize the reactivity of organic matter (specific UV absorbance (SUVA), an indicator developed for the free chlorine consumption in the treatment plant before distribution δ) and water residence time in the distribution system. French regulations impose a minimum trihalomethane level for drinking water and most tests are performed on treated water at the plant. Applied in this context, the model developed here helps better to understand trihalomethane exposure in the French population, particularly useful for epidemiological studies.
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Affiliation(s)
- Damien Mouly
- French Institute for Public Health Surveillance (InVS), 14 rue de Val d'Osne, 94415 Saint-Maurice cedex, France.
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Proulx F, Rodriguez MJ, Sérodes J, Bouchard C. A methodology for identifying vulnerable locations to taste and odour problems in a drinking water system. Water Sci Technol 2007; 55:177-83. [PMID: 17489408 DOI: 10.2166/wst.2007.177] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
In this research, methodology was developed to identify locations vulnerable to taste and odour problems in a distribution system. The methodology was based on a multicriteria procedure combining spatial information on consumer complaints and popular perception of tap water. The first step in the described methodology consisted of mapping complaints regarding tap water made by the population between 2002 and 2004 using a geographical information system (GIS). The second step consisted of analysing results of a questionnaire-based mail survey, also through GIS. The information generated using the above steps was integrated using a multicriteria and spatial approach allowing segregation of the distribution system into delineated zones, according to their vulnerability to occurrences of taste and odour problems. The identification of vulnerable sectors in a distribution system will help water managers to implement a better-targeted water quality monitoring programme--one that considers odours and tastes of drinking water--within the management process.
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Affiliation(s)
- F Proulx
- Division des laboratoires du Service de l'environnement de la Ville de Quebec, 210, St-Sacrement, Québec, G1N 3X6, Canada.
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Rodriguez MJ, Huard M, Sérodes JB. Experimental study of the formation of chlorination by-products in potable water of Quebec City, Canada. Bull Environ Contam Toxicol 2004; 72:211-218. [PMID: 15058675 DOI: 10.1007/s00128-003-0261-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Affiliation(s)
- M J Rodriguez
- Département d'Aménagement, Université Laval, Quebec, Canada
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Sivasubramaniam SD, Finch CC, Rodriguez MJ, Mahy N, Billett EE. A comparative study of the expression of monoamine oxidase-A and -B mRNA and protein in non-CNS human tissues. Cell Tissue Res 2003; 313:291-300. [PMID: 12898212 DOI: 10.1007/s00441-003-0765-6] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2003] [Accepted: 06/16/2003] [Indexed: 11/27/2022]
Abstract
The distributions of monoamine oxidase (MAO)-A and -B proteins and mRNAs in human heart, lung, liver, duodenum, kidney and vasculature were compared using immunohistochemistry and cRNA in situ hybridisation. MAO-A and -B mRNA were detected in all tissues, to differing extents, but particularly in glomeruli, hepatocytes, and the crypts, muscularis mucosa and muscularis externa of duodenum. Renal proximal and distal tubules and loops of Henle had more intense labelling for mRNA of MAO-B than MAO-A; this was reflected in MAO protein expression. Little immunoreactivity was detected in glomeruli. Hepatocytes expressed MAO-A moderately, but MAO-B strongly. In lungs, similar moderately intense labelling for both MAO mRNAs and immunoreactivities was evident in pneumocytes, and epithelial and smooth muscle cells. Cardiomyocytes contained both MAO isoforms, but with more, albeit moderate, labelling for MAO-A. Both isoforms were expressed equally in duodenal villi, crypts, muscularis externa and mucosa; lower level expression occurred in mucosal and submucosal cells. MAO-A and -B mRNA were detected in endothelia, adventitia and media of a renal interlobular artery, but protein immunoreactivities were chiefly in the adventitia. The data reveal widespread tissue distribution of MAO mRNAs and proteins, but indicate that presence of MAO mRNAs does not invariably reflect quantitatively its protein expression.
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Affiliation(s)
- S D Sivasubramaniam
- Department of Life Sciences, The Nottingham Trent University, Clifton Lane, Nottingham, NG11 8NS, UK
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Gonzalez-Moles MA, Gutierrez J, Rodriguez MJ, Ruiz-Avila I, Rodriguez-Archilla A. Epstein-Barr virus latent membrane protein-1 (LMP-1) expression in oral squamous cell carcinoma. Laryngoscope 2002; 112:482-7. [PMID: 12148858 DOI: 10.1097/00005537-200203000-00014] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVES Epstein-Barr virus (EBV) is frequently associated with malignant cell transformation through the action of the oncoprotein latent membrane protein-1 (LMP-1). The present study aimed to determine the presence of EBV in oral squamous cell carcinomas (OSCCs) and the expression of LMP-1 in neoplastic cells of EBV-positive OSCCs. STUDY DESIGN/METHODS In a retrospective study of 78 OSCCs, we investigated the presence of the DNA of EBV by polymerase chain reaction, the expression of the oncoprotein LMP-1 by immunohistochemistry, and the presence of EBV-encoded RNA (EBER) by in situ hybridization. RESULTS EBV DNA was detected in 19.2% of the cases. Expression of LMP-1 in neoplastic cells was found in 85.7% of the EBV-positive OSCCs. EBV presence was significantly more frequent (P <.05) in OSCCs localized on the lateral tongue. EBV-positive OSCCs more frequently presented (P <.05) greater nuclear atypia. CONCLUSION EBV can appear in latent form in OSCC and express its main oncoprotein, LMP-1.
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Affiliation(s)
- M A Gonzalez-Moles
- Department of Oral Medicine, School of Dentistry, University of Granada, Spain.
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Kett DH, Acosta RC, Campos MA, Rodriguez MJ, Quartin AA, Schein RM. Recurrent portopulmonary hypertension after liver transplantation: management with epoprostenol and resolution after retransplantation. Liver Transpl 2001; 7:645-8. [PMID: 11460234 DOI: 10.1053/jlts.2001.25358] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [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
We report a case of portopulmonary hypertension in which the pulmonary hypertension resolved after initial orthotopic liver transplantation. Portopulmonary hypertension recurred when the transplanted liver failed and again resolved after a second liver transplantation. Intravenous epoprostenol was administered perioperatively to control the pulmonary hypertension in both instances.
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Affiliation(s)
- D H Kett
- Divisions of Pulmonary and Critical Care Medicine, Department of Medicine, University of Miami School of Medicine, Miami, FL, USA.
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Abstract
Spatial and seasonal changes in trihalomethane (THM) concentrations were investigated in three distribution systems of Quebec (Canada) which are supplied by different surface waters and which use a variety of physicochemical treatment strategies. The investigation was based on an intensive 25-week sampling programme, undertaken at a time of year when the temperature of southern Quebec surface waters exceeds 4 degrees C (April-November). THMs and other water quality and operational parameters were monitored at points along the distribution system--between the treatment plant and the system extremities--which represented variable residence times of water. Results showed that THM concentrations vary significantly (from 1.5 to 2 times, depending on the utility) between finished waters as they leave the plant and water at the system extremities. When water temperature exceeds 15 degrees C, spatial THM variations are particularly high (from 2 to 4 times, depending on the utility). The development of multivariate regression models showed that water temperature was a better predictor of THM seasonal variability than chlorine dose, surrogates of natural organic matter and pH. Also, initial THM formation (in finished waters leaving the plant) was a good predictor of THM levels at distribution system extremities.
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Affiliation(s)
- M J Rodriguez
- Département d'Aménagement, Université Laval, Pavillon Savard, Que., Canada G1K 7P4.
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Abstract
The factors which control the sequential separation of the various chromosomes in a genome at the meta-anaphase junction are not well understood. In genomes in which separation is correlated with the quantity of pericentric heterochromatin one factor appears to be the epigenetic nature, namely condensation, of pericentric heterochromatin. When we induced decondensation of pericentric heterochromatin in mouse cells with 10(-6), 4x 10(-6) and 6x10(-6) M 5-azacytidine (5-AC) for 8 h, it resulted in alteration of the sequence of centromere separation. The centromeres which lacked pericentric heterochromatin appeared not to have been affected because there could not be an epigenetic alteration induced by 5-AC. The major effect was on chromosomes with the largest quantity of pericentric heterochromatin. These chromosomes separated at significantly higher frequency than in the untreated population. We also treated human cells, in which separation does not depend upon the quantity of heterochromatin, with 2x10(-5) and 6x10(-6) M 5-AC for 5 and 8 h. Compared with the control, 5-AC treatment resulted in an increased frequency of separated centromeres of acrocentric chromosomes in relation to those of non-acrocentric chromosomes. In the control the acrocentric chromosomes are the last to separate; in the treated population there was almost random separation of the two types of chromosomes. This epigenetic alteration might be another factor which results in genesis of aneuploidy.
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Affiliation(s)
- M J Rodriguez
- Departamento Biologia Animal y Genetica, Facultad de Medicina, Universidad del Pais Vasco/Euskal Herriko Unibertsitatea, Lejona Vizcaya, Spain 48940
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Rodriguez MJ, Belvo M, Morris R, Zeckner DJ, Current WL, Sachs RK, Zweifel MJ. The synthesis of pseudomycin C' via a novel acid promoted side-chain deacylation of pseudomycin A. Bioorg Med Chem Lett 2001; 11:161-4. [PMID: 11206449 DOI: 10.1016/s0960-894x(00)00613-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [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: 11/25/2022]
Abstract
The gamma hydroxyl present in the aliphatic side chain of the natural products pseudomycin A and C' provided a unique handle for the pH dependent side-chain deacylation. Low pH reaction conditions were used to cleave the side chain with minimal degradation of the peptide core. The pseudomycin nucleus intermediate obtained from the deacylation of pseudomycin A was pivotal in the synthesis of novel side-chain analogues. A practical synthesis of a minor fermentation factor pseudomycin C' and related analogues is reported.
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Affiliation(s)
- M J Rodriguez
- Lilly Research Laboratories, A Division of Eli Lilly & Company, Lilly Corporate Center, Indianapolis, IN 46285, USA.
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Kato T, O'Brien CB, Nishida S, Hoppe H, Gasser M, Berho M, Rodriguez MJ, Ruiz P, Tzakis AG. The first case report of the use of a zoom videoendoscope for the evaluation of small bowel graft mucosa in a human after intestinal transplantation. Gastrointest Endosc 1999; 50:257-61. [PMID: 10425423 DOI: 10.1016/s0016-5107(99)70235-x] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.6] [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: 02/08/2023]
Abstract
BACKGROUND Control of allograft rejection remains the most difficult dilemma in intestinal transplantation. Standard endoscopic surveillance to date has not been always accurate in the diagnosis of rejection. We describe the first application of a zoom video endoscope in monitoring graft mucosa in humans after intestinal transplantation. METHOD A zoom video endoscope, which can magnify the image up to 100-fold, was used in this study. The patient was a 31-year-old man who received an isolated intestinal transplant. Surveillance endoscopy with the zoom video endoscope was performed through the ileostomy. Endoscopic biopsies were done at the same time. RESULTS The zoom video endoscope showed the microscopic architecture of the graft mucosa such as villi and crypts with outstanding quality. We found that an enlargement of the crypt areas appeared to correlate with morphologic changes of early rejection. This finding was reversed with the treatment of rejection. CONCLUSIONS The zoom video endoscope successfully showed the detailed information of intestinal mucosa. The ability to visualize a more representative view of the graft mucosa could lead to better detection of early rejection. A greater experience with this unique method will provide more accurate assessment of the intestinal allograft.
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Affiliation(s)
- T Kato
- Division of Transplantation, University of Miami School of Medicine, Florida, USA
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Abstract
A facile synthesis of phosphonate and phosphate ester prodrugs on the phenolic hydroxy of two echinocandin semisynthetic derivatives is reported. The water solubility and stability profiles of the ECB compounds varied with the choice of alkyl group used. In some cases, the ester prodrugs with small aliphatic side chains retained antifungal activity while enhancing water solubility.
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Affiliation(s)
- M J Rodriguez
- Eli Lilly and Company, Lilly Research Laboratories, Indianapolis, IN 46285, USA
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Casal JI, Rodriguez MJ, Sarraseca J, Garcia J, Plana-Duran J, Sanz A. Identification of a common antigenic site in the nucleocapsid protein of European and North American isolates of porcine reproductive and respiratory syndrome virus. Adv Exp Med Biol 1998; 440:469-77. [PMID: 9782317 DOI: 10.1007/978-1-4615-5331-1_60] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) nucleocapsid (N) protein has been identified as the most immunodominant viral protein. The N protein genes from two PRRSV isolates Olot/91 (European) and Quebec 807/94 (North American) were cloned and expressed in Escherichia coli using the pET3x system. The antigenic structure of the PRRSV N protein was dissected using seven monoclonal antibodies (MAbs) and overlapping fragments of the protein expressed in E.coli. Three antigenic sites were found. Four MAbs recognized two discontinuous epitopes that were present in the partially folded protein or at least a large fragment comprising the first 78 residues, respectively. The other three MAbs revealed the presence of a common antigenic site localized in the central region of the protein (amino acids 50 to 66). This hydrophillic region is well conserved among different isolates of European and North American origin. However, since this epitope is not recognized by many pig sera, it is not adequate for diagnostic purposes. Moreover, none of the N protein fragments were able to mimic the antigenicity of the entire N protein.
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Rodriguez MJ, Snyder NJ, Zweifel MJ, Wilkie SC, Stack DR, Cooper RD, Nicas TI, Mullen DL, Butler TF, Thompson RC. Novel glycopeptide antibiotics: N-alkylated derivatives active against vancomycin-resistant enterococci. J Antibiot (Tokyo) 1998; 51:560-9. [PMID: 9711219 DOI: 10.7164/antibiotics.51.560] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
LY264826 (A82846B) is a naturally-occurring glycopeptide antibiotic, differing from vancomycin in the stereochemistry of the amino-sugar of the disaccharide function, and the presence of a third sugar attached at the benzylic position of amino acid residue 6. Despite these seemingly subtle differences, LY264826 is approximately 10 times more active than vancomycin against the enterococci. In the pursuit of new antibiotics active against multiresistant Gram-positive organisms, an extensive side chain SAR was developed focusing on the reductive alkylation of LY264826 at the amino function of the disaccharide moiety. A new series of derivatives having varying degrees of structural diversity in the side chain (e.g. varying lengths and degrees of rigidity) was found to have potent activity against vancomycin-resistant enterococci (MIC's < 1.0 microgram/ml) as well as activity against staphylococci and streptococci as good or better than vancomycin.
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Affiliation(s)
- M J Rodriguez
- Infectious Diseases Research, Lilly Research Laboratories, Eli Lilly & Co., Indianapolis, IN 46285, USA
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Jamison JA, LaGrandeur LM, Rodriguez MJ, Turner WW, Zeckner DJ. The synthesis and antifungal activity of nitrogen containing hemiaminal ethers of LY303366. J Antibiot (Tokyo) 1998; 51:239-42. [PMID: 9544949 DOI: 10.7164/antibiotics.51.239] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- J A Jamison
- Infectious Diseases Research, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, Indiana 46285, USA
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Rodriguez MJ, Sarraseca J, Garcia J, Sanz A, Plana-Durán J, Ignacio Casal J. Epitope mapping of the nucleocapsid protein of European and North American isolates of porcine reproductive and respiratory syndrome virus. J Gen Virol 1997; 78 ( Pt 9):2269-78. [PMID: 9292014 DOI: 10.1099/0022-1317-78-9-2269] [Citation(s) in RCA: 41] [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] Open
Abstract
Two major genotypes of porcine reproductive and respiratory syndrome virus (PRRSV) have been described, which correspond to the European and North American isolates. PRRSV nucleocapsid (N) protein has been identified as the most immunodominant viral protein. The N genes from two PRRSV isolates, Olot/91 (European) and Québec 807/94 (North American), were cloned and expressed in: (i) baculovirus under the control of the polyhedrin promoter and (ii) Escherichia coli using the pET3x system. The N protein from both isolates was expressed much more efficiently in E. coli as a fusion protein than in baculovirus. The antigenicity of the protein was similar in both systems and it was recognized by a collection of 48 PRRSV-positive pig sera. The antigenic structure of the PRRSV N protein was investigated using seven monoclonal antibodies (MAbs) and overlapping fragments of the protein expressed in E. coli. Four MAbs recognized two discontinuous epitopes that were present in the partially folded protein, or at least a large fragment comprising the first 78 residues. The other three MAbs revealed the presence of a common antigenic site localized in the central region of the protein (amino acids 50-66). This region is well conserved among different isolates of European and North American origin and is the most hydrophilic region of the protein. However, this epitope, although recognized by the MAbs and many pig sera, is not useful for diagnostic purposes. Moreover, none of the N protein fragments were able to mimic the antigenicity of the entire protein.
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Abstract
The synthesis and biological activity of a series of N-alkylated derivatives of echinocandin B are described and compared with the N-acylated analogs. The linear, rigid geometry of the side chain that was essential to improve the antifungal potency of the N-acylated series gave similar in vitro results with the N-alkylated derivatives. However the slight structural variation forfeited all in vivo activity.
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Affiliation(s)
- J A Jamison
- Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, Indiana 46285, USA
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