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Perea J, Gómez E, Escrivá C, Pellicer A, Rodriguez PL, Iranzo J, Vidal OJ, Sanchez JG, Montagud GS, Míco AF, Diaz IL, Sepúlveda NG, Hernández ES, Gallego JE, Carrasco C, Gaudens PC. 53P Real-world outcomes of first-line pembrolizumab (Pem) for metastatic non-small cell lung cancer (mNSCLC) with ≥50% expression of programmed cell death-ligand 1 (PD-L1): A multicentre retrospective study. J Thorac Oncol 2023. [DOI: 10.1016/s1556-0864(23)00307-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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Luna D, Carrasco C, Álvarez D, González C, Egaña JI, Figueroa J. Exploring Anhedonia in Kennelled Dogs: Could Coping Styles Affect Hedonic Preferences for Sweet and Umami Flavours? Animals (Basel) 2020; 10:ani10112087. [PMID: 33187104 PMCID: PMC7696099 DOI: 10.3390/ani10112087] [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: 09/30/2020] [Revised: 10/25/2020] [Accepted: 11/09/2020] [Indexed: 11/24/2022] Open
Abstract
Simple Summary Kennelled dogs are susceptible to suffer chronic stress when social interactions with conspecifics and spatial needs are long-term restricted. Chronic stress may affect pleasure perception of food and solutions in dogs as observed in several animals, a phenomenon known as anhedonia. However, little information exists on how different coping styles could prevent the onset of anhedonia. Fourteen kennelled Beagle dogs were used to study the acceptability and preference for different dilute palatable sucrose and monosodium glutamate (MSG) solutions. Coping style of animals was previously evaluated through a modified human-approach test. This test consisted in assessing whether or not dogs approached an unfamiliar human when a feeding opportunity was presented, classifying them as close dogs (CD; proactive) or distant dogs (DD; reactive) respectively. It was observed that DD presented a lower intake of both sucrose and MSG dilute solutions compared with CD. Moreover, DD exhibited a higher consumption of MSG than CD at the highest concentrations, supporting that their intake depends on solution palatability. Finally, DD did not prefer sucrose or MSG solutions over water at any dilute solution offered. Together, these results suggest that dogs that are categorized as reactive animals could diminish their ability to perceive dilute palatable solutions reflecting depressive-like behaviours such as anhedonia. Abstract Kennelled dogs are at risk of suffering chronic stress due to long-term spatial, social and feeding restrictions. Chronic stress may decrease the dogs’ capacity to feel pleasure when facing hedonic experiences, modifying their perception for palatable ingredients. However, different abilities to cope with environmental stressors could prevent the onset of anhedonia. Fourteen kennelled Beagle dogs were used to study the acceptability and preference for different dilute sucrose and monosodium glutamate (MSG) solutions. Coping style of animals was previously evaluated through a human approach test (HAT) and classified as close dogs (CD; proactive) or distant dogs (DD; reactive) according to whether or not they approached an unfamiliar human when a feeding opportunity was presented. Consumption results were analysed taking into account the sucrose/MSG concentrations, HAT (CD or DD), age, and weight of the animals. DD presented a lower intake of sucrose (p = 0.041) and MSG (p = 0.069) solutions compared with CD. However, DD exhibited a higher consumption of MSG than CD at its highest concentrations, supporting that their intake depends on solution palatability. Finally, DD did not prefer sucrose or MSG solutions over water at any dilute solution offered. Together, these results suggest that dogs that are categorized as reactive animals could diminish their ability to perceive dilute palatable solutions, reflecting depressive-like behaviours as anhedonia.
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Affiliation(s)
- Daniela Luna
- Departamento de Ciencias Animales, Facultad de Agronomía e Ingeniería Forestal, Pontificia Universidad Católica de Chile, Macul, Santiago 7820436, Chile;
| | - Carolina Carrasco
- Departamento de Fomento de la Producción Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santa Rosa 11735, La Pintana, Santiago 8820000, Chile; (C.C.); (D.Á.); (C.G.); (J.I.E.)
| | - Daniela Álvarez
- Departamento de Fomento de la Producción Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santa Rosa 11735, La Pintana, Santiago 8820000, Chile; (C.C.); (D.Á.); (C.G.); (J.I.E.)
| | - Catalina González
- Departamento de Fomento de la Producción Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santa Rosa 11735, La Pintana, Santiago 8820000, Chile; (C.C.); (D.Á.); (C.G.); (J.I.E.)
| | - Juan Ignacio Egaña
- Departamento de Fomento de la Producción Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santa Rosa 11735, La Pintana, Santiago 8820000, Chile; (C.C.); (D.Á.); (C.G.); (J.I.E.)
| | - Jaime Figueroa
- Departamento de Ciencias Animales, Facultad de Agronomía e Ingeniería Forestal, Pontificia Universidad Católica de Chile, Macul, Santiago 7820436, Chile;
- Correspondence: ; Tel.: +56-223-544-092
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Arellano J, Carrasco C, García C. [A report of successful management with simvastatin plus ezetimibe in alopecia areata]. Medwave 2020; 20:e8053. [PMID: 33231574 DOI: 10.5867/medwave.2020.10.8053] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Accepted: 10/13/2020] [Indexed: 11/27/2022] Open
Abstract
Alopecia areata is a common type of non-scarring alo¬pecia. Although the exact pathogenesis remains elusive, alopecia areata is thought to have a multifactorial etiology described as an interplay of genetic predisposition and environmental exposures. In patients with genetic susceptibility, stress, infection, and microtrauma have been documented to decrease immunosuppressive cytokines that generally maintain the hair follicle's immune privilege. There is currently no curative therapy for alopecia areata, although some treatments can induce hair growth in a percentage of patients. It has been postulated that simvastatin reestablishes the immune privilege, and ezetimibe would provide an immunomodulatory and anti-inflammatory effect. We report a case of a 23 years-old woman with alopecia areata successfully treated with simvastatin/ezetimibe.
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Affiliation(s)
- Javier Arellano
- Servicio de Dermatología Hospital Clínico San Borja Arriarán. Santiago, Chile; Departamento de Dermatología, Facultad de Medicina, Universidad de Chile, Santiago, Chile. ORCID: 0000-0002-3718-120X
| | - Carolina Carrasco
- Departamento de Dermatología, Facultad de Medicina, Universidad de Chile, Santiago, Chile. Dirección: Santos Dumont 999, Independencia, Santiago, Chile. . ORCID: 0000-0003-1227-8811
| | - Carolina García
- Departamento de Dermatología, Facultad de Medicina, Universidad de Chile, Santiago, Chile. ORCID: 0000-0002-1536-1162
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Wilkinson OJ, Carrasco C, Aicart-Ramos C, Moreno-Herrero F, Dillingham MS. Bulk and single-molecule analysis of a bacterial DNA2-like helicase-nuclease reveals a single-stranded DNA looping motor. Nucleic Acids Res 2020; 48:7991-8005. [PMID: 32621607 PMCID: PMC7430649 DOI: 10.1093/nar/gkaa562] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 06/12/2020] [Accepted: 06/19/2020] [Indexed: 11/14/2022] Open
Abstract
DNA2 is an essential enzyme involved in DNA replication and repair in eukaryotes. In a search for homologues of this protein, we identified and characterised Geobacillus stearothermophilus Bad, a bacterial DNA helicase-nuclease with similarity to human DNA2. We show that Bad contains an Fe-S cluster and identify four cysteine residues that are likely to co-ordinate the cluster by analogy to DNA2. The purified enzyme specifically recognises ss-dsDNA junctions and possesses ssDNA-dependent ATPase, ssDNA binding, ssDNA endonuclease, 5' to 3' ssDNA translocase and 5' to 3' helicase activity. Single molecule analysis reveals that Bad is a processive DNA motor capable of moving along DNA for distances of >4 kb at a rate of ∼200 bp per second at room temperature. Interestingly, as reported for the homologous human and yeast DNA2 proteins, the DNA unwinding activity of Bad is cryptic and can be unmasked by inactivating the intrinsic nuclease activity. Strikingly, our experiments show that the enzyme loops DNA while translocating, which is an emerging feature of processive DNA unwinding enzymes. The bacterial Bad enzymes will provide an excellent model system for understanding the biochemical properties of DNA2-like helicase-nucleases and DNA looping motor proteins in general.
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Affiliation(s)
- Oliver J Wilkinson
- School of Biochemistry, Biomedical Sciences Building, University of Bristol, University Walk, Bristol BS8 1TD, UK
| | - Carolina Carrasco
- Department of Macromolecular Structures, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas, 28049 Cantoblanco, Madrid, Spain
| | - Clara Aicart-Ramos
- Department of Macromolecular Structures, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas, 28049 Cantoblanco, Madrid, Spain
| | - Fernando Moreno-Herrero
- Department of Macromolecular Structures, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas, 28049 Cantoblanco, Madrid, Spain
| | - Mark S Dillingham
- School of Biochemistry, Biomedical Sciences Building, University of Bristol, University Walk, Bristol BS8 1TD, UK
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Mena L, Carrasco C, Folch H, de la Parra R, Carreño L. Primary cutaneous nodular amyloidosis associated with the injection of autologous fat. Clin Exp Dermatol 2020; 46:552-554. [PMID: 32844397 DOI: 10.1111/ced.14429] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/25/2020] [Indexed: 11/29/2022]
Affiliation(s)
- L Mena
- Dermatology Department, Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - C Carrasco
- Dermatology Department, Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - H Folch
- Dermatology Department, Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - R de la Parra
- Dermatology Department, Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - L Carreño
- Dermatopathology Section, Pathology Service, Hospital Clínico Universidad de Chile, Santiago, Chile
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Mias C, Maret A, Gontier E, Carrasco C, Satge C, Bessou-Touya S, Coubetergues H, Bennett-Kennett R, Dauskardt RH, Duplan H. Protective properties of Avène Thermal Spring Water on biomechanical, ultrastructural and clinical parameters of human skin. J Eur Acad Dermatol Venereol 2020; 34 Suppl 5:15-20. [PMID: 32870553 DOI: 10.1111/jdv.16450] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 03/27/2020] [Accepted: 03/31/2020] [Indexed: 11/27/2022]
Abstract
BACKGROUND Thermal Spring Water (TSW) has been recognized to have beneficial effects on skin; however, the mechanisms underlying these are not completely elucidated. AIMS We compared the effects of Avène TSW with mineral-rich (MR) TSW on the biomechanical properties of the skin using mechanistic ex vivo assays and clinical studies. METHODS Ex vivo studies included the effect of both TSWs on the structure of the surface of human skin explants using scanning electron microscopy (SEM); mineral elemental content on the skin surface using SEM coupled to energy dispersing X-ray spectroscopy; and the stress properties of the stratum corneum (SC) when exposed to dehydration. Human clinical studies were conducted to compare the soothing effect of TSWs after a dermatological chemical peeling of face skin and to evaluate the overall sensitive scale of consumers using Avène TSW for 7 days. RESULTS Both TSWs preserved surface skin ultrastructure; however, crystals formed from MR-TSW were needle-like and formed small grains, present in clusters heterogeneously spread over the surface. Needle crystals were mainly composed of calcium, while small clusters were mainly composed of sulphur. By contrast, Avène TSW-formed crystals composed of sodium and chlorine only were regular in shape and homogeneously distributed across the skin surface. Peak stress of SC layers was increased by MR-TSW, whereas Avène TSW showed a comparatively reduced effect on dehydration and stress. The difference in the two TSW types was reflected in clinical findings comparing postpeeling redness after TSW application. Avène TSW significantly decreased postpeeling redness, while MR-TSW increased it. The overall sensitive scale of consumers was decreased by 47% using Avène TSW for 7 days. CONCLUSIONS Avène TSW decreases postpeeling redness and soothes sensitive skin in human volunteers. Mechanistic studies suggested that differences in biomechanical effects could be linked to differences in calcium content of the TSW.
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Affiliation(s)
- C Mias
- Pierre Fabre Dermo-Cosmétique, Toulouse, France
| | - A Maret
- Pierre Fabre Dermo-Cosmétique, Toulouse, France
| | - E Gontier
- Bordeaux Imaging Center-UMS 3420 CNRS/Université de Bordeaux-US4 INSERM, Bordeaux, France
| | - C Carrasco
- Pierre Fabre Dermo-Cosmétique, Toulouse, France
| | - C Satge
- Pierre Fabre Dermo-Cosmétique, Toulouse, France
| | | | | | - R Bennett-Kennett
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA
| | - R H Dauskardt
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA
| | - H Duplan
- Pierre Fabre Dermo-Cosmétique, Toulouse, France
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Mias C, Maret A, Gontier E, Carrasco C, Satge C, Bessou-Touya S, Coubetergues H, Dauskardt R, Duplan H. 244 Protective properties of Avène thermal spring water on biomechanical, ultrastructural and clinical parameters of the human skin. J Invest Dermatol 2020. [DOI: 10.1016/j.jid.2020.03.249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Carrasco C, Pastrana CL, Aicart-Ramos C, Leuba SH, Khan S, Moreno-Herrero F. Dynamics of DNA nicking and unwinding by the RepC-PcrA complex. Nucleic Acids Res 2020; 48:2013-2025. [PMID: 31930301 PMCID: PMC7038956 DOI: 10.1093/nar/gkz1200] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 12/10/2019] [Accepted: 12/18/2019] [Indexed: 01/22/2023] Open
Abstract
The rolling-circle replication is the most common mechanism for the replication of small plasmids carrying antibiotic resistance genes in Gram-positive bacteria. It is initiated by the binding and nicking of double-stranded origin of replication by a replication initiator protein (Rep). Duplex unwinding is then performed by the PcrA helicase, whose processivity is critically promoted by its interaction with Rep. How Rep and PcrA proteins interact to nick and unwind the duplex is not fully understood. Here, we have used magnetic tweezers to monitor PcrA helicase unwinding and its relationship with the nicking activity of Staphylococcus aureus plasmid pT181 initiator RepC. Our results indicate that PcrA is a highly processive helicase prone to stochastic pausing, resulting in average translocation rates of 30 bp s-1, while a typical velocity of 50 bp s-1 is found in the absence of pausing. Single-strand DNA binding protein did not affect PcrA translocation velocity but slightly increased its processivity. Analysis of the degree of DNA supercoiling required for RepC nicking, and the time between RepC nicking and DNA unwinding, suggests that RepC and PcrA form a protein complex on the DNA binding site before nicking. A comprehensive model that rationalizes these findings is presented.
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Affiliation(s)
- Carolina Carrasco
- Department of Macromolecular Structures, Centro Nacional de Biotecnología, CSIC, Darwin 3, 28049 Cantoblanco, Madrid, Spain
| | - Cesar L Pastrana
- Department of Macromolecular Structures, Centro Nacional de Biotecnología, CSIC, Darwin 3, 28049 Cantoblanco, Madrid, Spain
| | - Clara Aicart-Ramos
- Department of Macromolecular Structures, Centro Nacional de Biotecnología, CSIC, Darwin 3, 28049 Cantoblanco, Madrid, Spain
| | - Sanford H Leuba
- Departments of Cell Biology and Bioengineering, UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, 5117 Centre Avenue, Pittsburgh, PA 15213, USA
| | - Saleem A Khan
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, 450 Technology Drive, Pittsburgh, PA 15219, USA
| | - Fernando Moreno-Herrero
- Department of Macromolecular Structures, Centro Nacional de Biotecnología, CSIC, Darwin 3, 28049 Cantoblanco, Madrid, Spain
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Peralta OA, Carrasco C, Vieytes C, Tamayo MJ, Muñoz I, Sepulveda S, Tadich T, Duchens M, Melendez P, Mella A, Torres CG. Safety and efficacy of a mesenchymal stem cell intramammary therapy in dairy cows with experimentally induced Staphylococcus aureus clinical mastitis. Sci Rep 2020; 10:2843. [PMID: 32071371 PMCID: PMC7028716 DOI: 10.1038/s41598-020-59724-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [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: 10/28/2019] [Accepted: 01/21/2020] [Indexed: 12/14/2022] Open
Abstract
Although, antibiotics are effective in the treatment of bovine mastitis, they do not address the regeneration of mammary glandular tissue and have been associated to the increment in antimicrobial resistance worldwide. Considering the necessity of alternative therapies for this disease of high economic impact and the reported regenerative and antibacterial effects of mesenchymal stem cell (MSCs), we evaluated the safety and efficacy of an allogenic MSC-based intramammary therapy in dairy cows with experimentally induced Staphylococcus aureus clinical mastitis. In a safety trial, heifers were inoculated intramammarily with a 2.5 × 107-suspension of bovine fetal AT-MSCs on experimental days 1 and 10. Animals were evaluated clinically on a daily basis during a 20-day experimental period and blood samples were collected for hemogram determination and peripheral blood leukocytes (PBLs) isolation. In an efficacy trial, Holstein Friesian cows were inoculated with S. aureus and treated intramammarily with vehicle (NEG; days 4 and 10), antibiotics (ATB; days 4 and 5) or a suspension of 2.5 × 107 AT-MSCs (MSC; days 4 and 5). Cows were clinically evaluated daily and milk samples were collected for somatic cell count (SCC) and colony forming units (CFU). Blood samples were collected for serum haptoglobin and amyloid A determination. Intramammary administration of two doses of bovine fetal AT-MSCs in healthy cows did not induce changes in clinical or hematological variables, and gene expression profiles in PBLs associated to activation (CD4, CD8, CD25, CD62L and CD69) and proinflammatory cytokines (CCL2, CCL5, IL2, CXCL3, IFNγ, and TNFα). Quarters of MSC group of cows had similar SCC log/mL in milk compared to infected quarters of ATB or NEG cows. However, quarters of MSC cows had lower CFU log/mL in milk compared to quarters of NEG cows. Intramammarily inoculation of repeated doses of 2.5 × 107 allogenic AT-MSCs did not induce clinical or immunological response in healthy cows. Moreover, MSC-intramammary treatment reduced bacterial count in milk of cows with S. aureus clinical mastitis compared to untreated cows. This work provides initial evidence for the safety and efficacy of an allogenic MSC-based intramammary therapy for the treatment of bovine mastitis.
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Affiliation(s)
- O A Peralta
- Department of Animal Production Science, Faculty of Animal and Veterinary Sciences, University of Chile, Santiago, 8820808, Chile. .,Department of Biomedical Sciences and Pathobiology, Virginia-Maryland Regional College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, 24060, USA.
| | - C Carrasco
- Department of Animal Production Science, Faculty of Animal and Veterinary Sciences, University of Chile, Santiago, 8820808, Chile
| | - C Vieytes
- Department of Animal Production Science, Faculty of Animal and Veterinary Sciences, University of Chile, Santiago, 8820808, Chile
| | - M J Tamayo
- Department of Animal Production Science, Faculty of Animal and Veterinary Sciences, University of Chile, Santiago, 8820808, Chile
| | - I Muñoz
- Department of Animal Production Science, Faculty of Animal and Veterinary Sciences, University of Chile, Santiago, 8820808, Chile
| | - S Sepulveda
- Department of Animal Production Science, Faculty of Animal and Veterinary Sciences, University of Chile, Santiago, 8820808, Chile
| | - T Tadich
- Department of Animal Production Science, Faculty of Animal and Veterinary Sciences, University of Chile, Santiago, 8820808, Chile
| | - M Duchens
- Department of Animal Production Science, Faculty of Animal and Veterinary Sciences, University of Chile, Santiago, 8820808, Chile
| | - P Melendez
- Food Animal Health & Management Program, College of Veterinary Medicine, University of Georgia, Athens, GA, 30602, USA
| | - A Mella
- Mastitis Laboratory, Department of Biochemistry and Microbiology, Faculty of Sciences, Austral University of Chile, Valdivia, 5110566, Chile
| | - C G Torres
- Department of Clinical Sciences, Faculty of Animal and Veterinary Sciences, University of Chile, Santiago, 8820808, Chile
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Avnery O, Martin M, Bura-Riviere A, Barillari G, Mazzolai L, Mahé I, Marchena PJ, Verhamme P, Monreal M, Ellis MH, Aibar MA, Aibar J, Amado C, Arcelus JI, Ballaz A, Barba R, Barrón M, Barrón‐Andrés B, Bascuñana J, ina A, Camon AM, Cañas I, Carrasco C, Castro J, Ancos C, Toro J, Demelo P, Díaz‐Peromingo JA, Falgá C, Farfán AI, Fernández‐Capitán C, Fernández‐Criado MC, Fernández‐Núñez S, Fidalgo MA, Font C, Font L, Freire M, Gallego M, García MA, García‐Bragado F, García‐Morillo M, García‐Raso A, Gavín O, Gayol MC, Gil‐Díaz A, Gómez V, Gómez‐Cuervo C, González‐Martínez J, Grau E, Gutiérrez J, Hernández‐Blasco LM, Iglesias M, Jara‐Palomares L, Jaras MJ, Jiménez R, Jiménez‐Castro D, Jiménez‐López J, Joya MD, Lima J, Llamas P, Lobo JL, López‐Jiménez L, López‐Miguel P, López‐Núñez JJ, López‐Reyes R, López‐Sáez JB, Lorente MA, Lorenzo A, Loring M, Madridano O, Maestre A, Martín del Pozo M, Martín‐Guerra JM, Martín‐Romero M, Mellado M, Morales MV, Muñoz N, Nieto‐Cabrera MA, Nieto‐Rodríguez JA, Núñez‐Ares A, Núñez MJ, Olivares MC, Otalora S, Otero R, Pedrajas JM, Pellejero G, Pérez‐Rus G, Peris ML, Porras JA, Rivas A, Rodríguez‐Dávila MA, Rodríguez‐Hernández A, Rubio CM, Ruiz‐Artacho P, Ruiz‐Ruiz J, Ruiz‐Torregrosa P, Ruiz‐Sada P, Sahuquillo JC, Salazar V, Sampériz A, Sánchez‐Muñoz‐Torrero JF, Sancho T, Soler S, Sopeña B, Suriñach JM, Tolosa C, Torres MI, Trujillo‐Santos J, Uresandi F, Valle R, Vidal G, Villares P, Gutiérrez P, Vázquez FJ, Vilaseca A, Vanassche T, Vandenbriele C, Hirmerova J, Malý R, Salgado E, Benzidia I, Bertoletti L, Debourdeau P, Farge‐Bancel D, Hij A, Moustafa F, Schellong S, Braester A, Brenner B, Tzoran I, Sharif‐Kashani B, Bilora F, Bortoluzzi C, Bucherini E, Ciammaichella M, Dentali F, Di Micco P, Di Pangrazio M, Maida R, Mastroiacovo D, Pace F, Pallotti G, Parisi R, Pesavento R, Prandoni P, Quintavalla R, Rocci A, Siniscalchi C, Tufano A, Visonà A, Vo Hong N, Gibietis V, Skride A, Strautmane S, Bosevski M, Zdraveska M, Bounameaux H, Fresa M, Ney B, Caprini J, Bui HM, Pham KQ. D-dimer levels and risk of recurrence following provoked venous thromboembolism: findings from the RIETE registry. J Intern Med 2020; 287:32-41. [PMID: 31394000 DOI: 10.1111/joim.12969] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Patients with venous thromboembolism (VTE) secondary to transient risk factors may develop VTE recurrences after discontinuing anticoagulation. Identifying at-risk patients could help to guide the duration of therapy. METHODS We used the RIETE database to assess the prognostic value of d-dimer testing after discontinuing anticoagulation to identify patients at increased risk for recurrences. Transient risk factors were classified as major (postoperative) or minor (pregnancy, oestrogen use, immobilization or recent travel). RESULTS In December 2018, 1655 VTE patients with transient risk factors (major 460, minor 1195) underwent d-dimer measurements after discontinuing anticoagulation. Amongst patients with major risk factors, the recurrence rate was 5.74 (95% CI: 3.19-9.57) events per 100 patient-years in those with raised d-dimer levels and 2.68 (95% CI: 1.45-4.56) in those with normal levels. Amongst patients with minor risk factors, the rates were 7.79 (95% CI: 5.71-10.4) and 3.34 (95% CI: 2.39-4.53), respectively. Patients with major risk factors and raised d-dimer levels (n = 171) had a nonsignificantly higher rate of recurrences (hazard ratio [HR]: 2.14; 95% CI: 0.96-4.79) than those with normal levels. Patients with minor risk factors and raised d-dimer levels (n = 382) had a higher rate of recurrences (HR: 2.34; 95% CI: 1.51-3.63) than those with normal levels. On multivariate analysis, raised d-dimers (HR: 1.74; 95% CI: 1.09-2.77) were associated with an increased risk for recurrences in patients with minor risk factors, not in those with major risk factors. CONCLUSIONS Patients with raised d-dimer levels after discontinuing anticoagulant therapy for VTE provoked by a minor transient risk factor were at an increased risk for recurrences.
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Affiliation(s)
- O Avnery
- Meir Medical Center, Hematology Institute and Blood Bank, Kfar Saba, Israel.,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - M Martin
- Hospital Infanta Sofia San Sebastian de los Reyes and Universidad Europea de Madrid, Madrid, Spain
| | - A Bura-Riviere
- Department of Vascular Medicine, Hôpital de Rangueil, Toulouse, France
| | - G Barillari
- Department of Internal Medicine, Ospedale S. Maria della Misericordia, Udine, Italy
| | - L Mazzolai
- Department of Angiology, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland
| | - I Mahé
- Department of Internal Medicine, Hôpital Louis Mourier, Colombes (APHP), University Paris 7, Colombes, France
| | - P J Marchena
- Department of Internal Medicine and Emergency, Parc Sanitari Sant Joan de Deu-Hospital General, Barcelona, Spain
| | - P Verhamme
- Vascular Medicine and Haemostasis, University of Leuven, Leuven, Belgium
| | - M Monreal
- Hospital Universitari Germans Trias i Pujol, Badalona, Barcelona, Spain
| | - M H Ellis
- Meir Medical Center, Hematology Institute and Blood Bank, Kfar Saba, Israel.,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
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Andrade-Mayorga O, Lavados-Romo P, Valdebenito C, Herrera CL, Carrasco C, Salazar LA. Polimorfismo Genético ACTN3 R577X en Deportistas Universitarios Chilenos. INT J MORPHOL 2019. [DOI: 10.4067/s0717-95022019000401493] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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12
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Núñez J, Yeber M, Cisternas N, Thibaut R, Medina P, Carrasco C. Application of electrocoagulation for the efficient pollutants removal to reuse the treated wastewater in the dyeing process of the textile industry. J Hazard Mater 2019; 371:705-711. [PMID: 30897490 DOI: 10.1016/j.jhazmat.2019.03.030] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 03/05/2019] [Accepted: 03/06/2019] [Indexed: 06/09/2023]
Abstract
The possibility of using electrocoagulation for efficient removal of pollutants in the industrial liquid waste of a textile industry was studied. The performance of the process was evaluated through the analysis of color, turbidity, and chemical oxygen demand (COD). The analysis was first done with the wastewater coming from the process of dyeing linen, which is the most polluting of all effluents that reach the residual effluent pool (REP). For the analysis, the MODDE 7.0 software was used to construct a statistical model. With the results obtained from this model and the experimental measurements, response surfaces were obtained. These response surfaces predicted the behavior of electrocoagulation for different values of the studied variables (pH, current density, and treatment time). Based on the obtained results, the wastewater coming from the REP was treated using the optimum values for the operational variables. After the treatment it was possible to remove 86% color, 82% turbidity, and 59% COD. It was demonstrated that reusing the treated water in the process of wool dyeing does not have a negative effect on the quality of the dyed fabric. Thus, it is possible to implement the process in the textile industry to reduce the consumption of water.
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Affiliation(s)
- J Núñez
- Department of Materials Engineering, University of Concepción, Edmundo Larenas 270, Concepción, Chile
| | - M Yeber
- Departament of Environmental Chemistry, Faculty of Sciences, Catholic University of the Santísima Concepción, Alonso de Ribera 2850, casilla 297, Concepción, Chile
| | - N Cisternas
- Solar Energy Research Center, SERC, Av. Tupper 2007, Santiago, Chile
| | - R Thibaut
- Crossville Fabric, Mariano Egaña 820, Tomé, Chile
| | - P Medina
- Departament of Environmental Chemistry, Faculty of Sciences, Catholic University of the Santísima Concepción, Alonso de Ribera 2850, casilla 297, Concepción, Chile
| | - C Carrasco
- Department of Materials Engineering, University of Concepción, Edmundo Larenas 270, Concepción, Chile; Solar Energy Research Center, SERC, Av. Tupper 2007, Santiago, Chile.
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13
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Leal MS, Briones X, Villalobos V, Queneau Y, Leiva A, Ríos HE, Pavez J, Silva CP, Carrasco C, Neira-Carrillo A, Roth AD, Tamayo L, Urzúa MD. Amino Acid-Functionalized Polyelectrolyte Films as Bioactive Surfaces for Cell Adhesion. ACS Appl Mater Interfaces 2019; 11:19751-19762. [PMID: 31074956 DOI: 10.1021/acsami.9b02503] [Citation(s) in RCA: 3] [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] [Indexed: 06/09/2023]
Abstract
Surfaces were prepared with polyelectrolyte derivatives of poly(styrene- alt-maleic anhydride) (PSMA) functionalized with amino acids of different hydropathy indices, with the aim of evaluating the effect of the chemical functionality of polyelectrolytes on SH-SY5Y neuroblastoma cell adhesion. Functionalizing PSMA derivatives with l-glutamine, l-methionine, and l-tyrosine yielded PSMA-Gln, PSMA-Met, and PSMA-Tyr polyelectrolytes, respectively. We first studied the adsorption behavior of PSMA functionalized with amino acids on silicon wafer surfaces modified with 3-aminopropyltriethoxysilane at pH 4.0 and 7.0 and at low and high ionic strengths. The highest rate of polyelectrolyte adsorption was at pH 4.0 and high ionic strength and was higher with the glutamine and tyrosine films. The advance contact angles (θA) of the polyelectrolyte surfaces showed a moderate effect of ionic strength and pH on polyelectrolyte film wettability, with PSMA-Tyr being slightly more hydrophobic. Atomic force microscopy images of the polyelectrolyte surfaces showed two types of morphology: the well-defined globular nanostructure of PSMA-Met and PSMA-Tyr and densely packed nanofibrous-like structure of PSMA-Gln. The highest level of ionic strength caused a slight decrease in the size of the nanostructure that formed the surface domains, which was reflected in the degree of surface roughness. Cell adhesion assays with the polyelectrolyte film showed that SH-SY5Y neuroblastoma cells cultured on PSMA-Met present a well-extended morphology characterized by a stellate shape, with five or more actin-rich thin processes, whereas SH-SY5Y cells that were seeded on PSMA-Gln and PSMA-Tyr have a round morphology, with fewer and shorter processes. These results indicate that it is possible to modulate the surface characteristics of polyelectrolyte films based on their chemical functionality and environmental parameters such as pH and ionic strength in order to evaluate their effect on cell adhesion. Thus, surfaces prepared from polyelectrolytes functionalized with amino acids are an attractive and simple platform for cell adhesion, which can be used in developing biomaterials with modulated surface properties.
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Affiliation(s)
- M S Leal
- Departamento de Química, Facultad de Ciencias , Universidad de Chile , Las Palmeras , 3425 Santiago , Chile
| | - X Briones
- Departamento de Química, Facultad de Ciencias , Universidad de Chile , Las Palmeras , 3425 Santiago , Chile
| | - V Villalobos
- Instituto de Ciencias Químicas Aplicadas, Facultad de Ingeniería , Universidad Autónoma de Chile , El Llano Subercaseaux , 2801 San Miguel , Chile
| | - Y Queneau
- Université de Lyon, ICBMS, UMR 5246, CNRS, UCBL, INSA Lyon, CPE Lyon, Bât. Lederer , 1 Rue Victor Grignard , 69622 Villeurbanne Cedex , France
| | - A Leiva
- Departamento Química Física, Facultad de Química , Pontificia Universidad Católica de Chile , Macul , 7820436 Santiago , Chile
| | - H E Ríos
- Departamento de Química, Facultad de Ciencias , Universidad de Chile , Las Palmeras , 3425 Santiago , Chile
| | - J Pavez
- Departamento de Química de los Materiales, Fac. de Química-Biología , Universidad de Santiago de Chile , Av. B. O'Higgins , 3363 Santiago , Chile
| | - C P Silva
- Departamento de Química de los Materiales, Fac. de Química-Biología , Universidad de Santiago de Chile , Av. B. O'Higgins , 3363 Santiago , Chile
| | - C Carrasco
- Departamento de Biología, Facultad de Ciencias , Universidad de Chile , P. C. 780-0023 Santiago , Chile
| | - Andrónico Neira-Carrillo
- Faculty de Ciencias Veterinarias y Pecuarias , Universidad de Chile , Av. Sta. Rosa , 11735 Santiago , Chile
| | - A D Roth
- Departamento de Biología, Facultad de Ciencias , Universidad de Chile , P. C. 780-0023 Santiago , Chile
| | - L Tamayo
- Departamento de Química, Facultad de Ciencias , Universidad de Chile , Las Palmeras , 3425 Santiago , Chile
| | - M D Urzúa
- Departamento de Química, Facultad de Ciencias , Universidad de Chile , Las Palmeras , 3425 Santiago , Chile
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14
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Alaejos AR, Esteban GP, Saiz A, Carrasco C, Delgado J, Bauça J, Bauzá JR. Evaluation of a rapid assay as a “second tier-like test” for measuring TSH in newborns. Clin Chim Acta 2019. [DOI: 10.1016/j.cca.2019.03.1239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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15
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Nasi M, Germain F, Valencia E, Carrasco C, Vega S, Gonzalez W, Carrasco C. Correlation between blood loss and hematologic values variation in orthognathic surgery under hipotensive antesthesia. Int J Oral Maxillofac Surg 2019. [DOI: 10.1016/j.ijom.2019.03.367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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16
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Hidalgo A, Melo A, Romero F, Villanueva J, Carrasco C, Jara P, Venegas J, Fonseca-Salamanca F. A PCR-RFLP assay for discrimination of Echinococcus granulosus sensu stricto and Taenia spp. in dogs stool. Exp Parasitol 2019; 200:42-47. [PMID: 30922888 DOI: 10.1016/j.exppara.2019.03.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 02/28/2019] [Accepted: 03/21/2019] [Indexed: 12/26/2022]
Abstract
In order to develop a method of identification and discrimination of Echinococcus granulosus sensu stricto from faecal samples of dogs infected with taeniid eggs (Echinococcus spp., Taenia spp.), a combined strategy of Polymerase Chain Reaction (PCR) and Restriction Fragments of Lenght Polymorphisms (RFLP) was proposed. Initially, a pair of primers was designed to amplify a fragment of the 12 Subunit of ribosomal RNA gene (12SrRNA) from mitochondrial DNA. The amplified product was digested by SspI restriction enzyme, which in E. granulosus kept the intact fragment of 160 basis pairs (bp), while in Taenia spp. produced two fragments (62 bp and another of 98 bp). The method was tested using positive controls of DNA, in faecal samples experimentally contaminated with eggs of E. granulosus and Taenia spp. and in dogs naturally infected. In all of them, reproducible results were obtained and the primers were specific to amplify only Taeniidae DNA. The sensitivity of the technique was tested, achieving amplification of DNA extractions with a single egg. In conclusion, the technique developed was optimal and easy to identify patent infections by E. granulosus s.s., constituting a possible alternative for epidemiological studies in dogs, especially in endemic areas where this infection occurs.
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Affiliation(s)
- Alejandro Hidalgo
- Department of Preclinical Sciences, Medicine Faculty, Laboratory of Molecular Immunoparasitology, Center of Translational Medicine Scientific and Technological Nucleus (CEMT-BIOREN), Universidad de La Frontera, Temuco, Chile; Doctoral Program of Sciences in Applied Cellular and Molecular Biology, Universidad de La Frontera, Temuco, Chile; School of Veterinary Medicine, Faculty of Natural Resources and Veterinary Medicine, Universidad Santo Tomás, Temuco, Chile
| | - Angélica Melo
- Department of Preclinical Sciences, Medicine Faculty, Laboratory of Molecular Immunoparasitology, Center of Translational Medicine Scientific and Technological Nucleus (CEMT-BIOREN), Universidad de La Frontera, Temuco, Chile
| | - Fernando Romero
- Department of Preclinical Sciences, Medicine Faculty, Laboratory of Molecular Immunoparasitology, Center of Translational Medicine Scientific and Technological Nucleus (CEMT-BIOREN), Universidad de La Frontera, Temuco, Chile; Doctoral Program of Sciences in Applied Cellular and Molecular Biology, Universidad de La Frontera, Temuco, Chile
| | - José Villanueva
- Department of Preclinical Sciences, Medicine Faculty, Laboratory of Molecular Immunoparasitology, Center of Translational Medicine Scientific and Technological Nucleus (CEMT-BIOREN), Universidad de La Frontera, Temuco, Chile; School of Veterinary Medicine, Faculty of Natural Resources and Veterinary Medicine, Universidad Santo Tomás, Temuco, Chile
| | - Carolina Carrasco
- Department of Preclinical Sciences, Medicine Faculty, Laboratory of Molecular Immunoparasitology, Center of Translational Medicine Scientific and Technological Nucleus (CEMT-BIOREN), Universidad de La Frontera, Temuco, Chile
| | - Paulina Jara
- Department of Preclinical Sciences, Medicine Faculty, Laboratory of Molecular Immunoparasitology, Center of Translational Medicine Scientific and Technological Nucleus (CEMT-BIOREN), Universidad de La Frontera, Temuco, Chile
| | - Juan Venegas
- Cellular and Molecular Biology Program, Biomedical Sciences Institute (ICBM), Medicine Faculty, Universidad de Chile, Santiago, Chile
| | - Flery Fonseca-Salamanca
- Department of Preclinical Sciences, Medicine Faculty, Laboratory of Molecular Immunoparasitology, Center of Translational Medicine Scientific and Technological Nucleus (CEMT-BIOREN), Universidad de La Frontera, Temuco, Chile; Doctoral Program of Sciences in Applied Cellular and Molecular Biology, Universidad de La Frontera, Temuco, Chile.
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17
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Martín-García B, Martín-González A, Carrasco C, Hernández-Arriaga AM, Ruíz-Quero R, Díaz-Orejas R, Aicart-Ramos C, Moreno-Herrero F, Oliva MA. The TubR-centromere complex adopts a double-ring segrosome structure in Type III partition systems. Nucleic Acids Res 2018; 46:5704-5716. [PMID: 29762781 PMCID: PMC6009700 DOI: 10.1093/nar/gky370] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 04/27/2018] [Indexed: 11/26/2022] Open
Abstract
In prokaryotes, the centromere is a specialized segment of DNA that promotes the assembly of the segrosome upon binding of the Centromere Binding Protein (CBP). The segrosome structure exposes a specific surface for the interaction of the CBP with the motor protein that mediates DNA movement during cell division. Additionally, the CBP usually controls the transcriptional regulation of the segregation system as a cell cycle checkpoint. Correct segrosome functioning is therefore indispensable for accurate DNA segregation. Here, we combine biochemical reconstruction and structural and biophysical analysis to bring light to the architecture of the segrosome complex in Type III partition systems. We present the particular features of the centromere site, tubC, of the model system encoded in Clostridium botulinum prophage c-st. We find that the split centromere site contains two different iterons involved in the binding and spreading of the CBP, TubR. The resulting nucleoprotein complex consists of a novel double-ring structure that covers part of the predicted promoter. Single molecule data provides a mechanism for the formation of the segrosome structure based on DNA bending and unwinding upon TubR binding.
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Affiliation(s)
- Bárbara Martín-García
- Department of Structural and Chemical Biology, CSIC-Centro de Investigaciones Biológicas, Madrid 28040, Spain
| | | | - Carolina Carrasco
- Department of Macromolecular Structures, CSIC-Centro Nacional de Biotecnología, Madrid 28049, Spain
| | - Ana M Hernández-Arriaga
- Department of Structural and Chemical Biology, CSIC-Centro de Investigaciones Biológicas, Madrid 28040, Spain
| | - Rubén Ruíz-Quero
- Department of Structural and Chemical Biology, CSIC-Centro de Investigaciones Biológicas, Madrid 28040, Spain
| | - Ramón Díaz-Orejas
- Department of Structural and Chemical Biology, CSIC-Centro de Investigaciones Biológicas, Madrid 28040, Spain
| | - Clara Aicart-Ramos
- Department of Macromolecular Structures, CSIC-Centro Nacional de Biotecnología, Madrid 28049, Spain
| | - Fernando Moreno-Herrero
- Department of Macromolecular Structures, CSIC-Centro Nacional de Biotecnología, Madrid 28049, Spain
| | - María A Oliva
- Department of Structural and Chemical Biology, CSIC-Centro de Investigaciones Biológicas, Madrid 28040, Spain
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18
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Galliano M, Carrasco C, Coubetergues H, Sandrine B, Hélène D. 712 Assessing skin barrier and stratum corneum surface integrity after application of skin cleansers on human skin by ex-vivo confocal laser scanning microscopy. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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19
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Galliano M, Carrasco C, Mengeaud V, Sandrine B, Hélène D. 709 Effect of acefylline on filaggrin expression and catabolism in a model of reconstructed human epidermis exposed to dryness. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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20
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Galliano M, Carrasco C, Mengeaud V, Bessou-Touya S, Duplan H. 161 Interest of 10-Hydroxy-2-decenoic acid and acefylline-containing-creams for hydration and nutrition of dry skin. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.07.471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Palme M, Inostroza L, Villacreses G, Lobato A, Carrasco C. Urban weather data and building models for the inclusion of the urban heat island effect in building performance simulation. Data Brief 2017; 14:671-675. [PMID: 28932771 PMCID: PMC5596256 DOI: 10.1016/j.dib.2017.08.035] [Citation(s) in RCA: 9] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2017] [Revised: 08/14/2017] [Accepted: 08/25/2017] [Indexed: 11/27/2022] Open
Abstract
This data article presents files supporting calculation for urban heat island (UHI) inclusion in building performance simulation (BPS). Methodology is used in the research article “From urban climate to energy consumption. Enhancing building performance simulation by including the urban heat island effect” (Palme et al., 2017) [1]. In this research, a Geographical Information System (GIS) study is done in order to statistically represent the most important urban scenarios of four South-American cities (Guayaquil, Lima, Antofagasta and Valparaíso). Then, a Principal Component Analysis (PCA) is done to obtain reference Urban Tissues Categories (UTC) to be used in urban weather simulation. The urban weather files are generated by using the Urban Weather Generator (UWG) software (version 4.1 beta). Finally, BPS is run out with the Transient System Simulation (TRNSYS) software (version 17). In this data paper, four sets of data are presented: 1) PCA data (excel) to explain how to group different urban samples in representative UTC; 2) UWG data (text) to reproduce the Urban Weather Generation for the UTC used in the four cities (4 UTC in Lima, Guayaquil, Antofagasta and 5 UTC in Valparaíso); 3) weather data (text) with the resulting rural and urban weather; 4) BPS models (text) data containing the TRNSYS models (four building models).
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Affiliation(s)
- M Palme
- Universidad Católica del Norte, Antofagasta, Chile.,Instituto Nacional de Eficiencia Energética y Energías Renovables, Quito, Ecuador
| | - L Inostroza
- Institute of Geography, Ruhr Universität Bochum, Germany.,Universidad Autónoma de Chile, Temuco, Chile
| | - G Villacreses
- Instituto Nacional de Eficiencia Energética y Energías Renovables, Quito, Ecuador
| | - A Lobato
- Instituto Nacional de Eficiencia Energética y Energías Renovables, Quito, Ecuador
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22
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Pastrana CL, Carrasco C, Akthar P, Leuba SH, Khan SA, Moreno-Herrero F. Towards Rolling-Circle Replication at the Single-Molecule Level. Biophys J 2017. [DOI: 10.1016/j.bpj.2016.11.2019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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23
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Blume-Peytavi U, Tan J, Tennstedt D, Boralevi F, Fabbrocini G, Torrelo A, Soares-Oliveira R, Haftek M, Rossi AB, Thouvenin MD, Mangold J, Galliano MF, Hernandez-Pigeon H, Aries MF, Rouvrais C, Bessou-Touya S, Duplan H, Castex-Rizzi N, Mengeaud V, Ferret PJ, Clouet E, Saint Aroman M, Carrasco C, Coutanceau C, Guiraud B, Boyal S, Herman A, Delga H, Biniek K, Dauskardt R. Fragility of epidermis in newborns, children and adolescents. J Eur Acad Dermatol Venereol 2016; 30 Suppl 4:3-56. [PMID: 27062556 DOI: 10.1111/jdv.13636] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 02/10/2016] [Accepted: 02/17/2016] [Indexed: 12/18/2022]
Abstract
Within their first days of life, newborns' skin undergoes various adaptation processes needed to accommodate the transition from the wet uterine environment to the dry atmosphere. The skin of newborns and infants is considered as a physiological fragile skin, a skin with lower resistance to aggressions. Fragile skin is divided into four categories up to its origin: physiological fragile skin (age, location), pathological fragile skin (acute and chronic), circumstantial fragile skin (due to environmental extrinsic factors or intrinsic factors such as stress) and iatrogenic fragile skin. Extensive research of the past 10 years have proven evidence that at birth albeit showing a nearly perfect appearance, newborn skin is structurally and functionally immature compared to adult skin undergoing a physiological maturation process after birth at least throughout the first year of life. This article is an overview of all known data about fragility of epidermis in 'fragile populations': newborns, children and adolescents. It includes the recent pathological, pathophysiological and clinical data about fragility of epidermis in various dermatological diseases, such as atopic dermatitis, acne, rosacea, contact dermatitis, irritative dermatitis and focus on UV protection.
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Affiliation(s)
- U Blume-Peytavi
- Department of Dermatology and Allergy, Clinical Research Center for Hair and Skin Science, Charité-Universitätsmedizin, Berlin, Germany
| | - J Tan
- Department of Medicine, Faculty of Medicine, Schulich School of Medicine and Dentistry, Western University, Windsor campus, Windsor, ON, Canada.,Windsor Clinical Research Inc., Windsor campus, Windsor, ON, Canada
| | - D Tennstedt
- Department of Dermatology, Saint-Luc University Clinics, Brussels, Belgium
| | - F Boralevi
- Pediatric Dermatology, Pellegrin Hospital, Bordeaux, France
| | - G Fabbrocini
- Department of Dermatology, University Hospital of Naples, Naples, Italy
| | - A Torrelo
- Pediatric Dermatology, Hospital del Niño Jesús, Madrid, Spain
| | | | - M Haftek
- University Lyon 1, Lyon, France.,University Lyon 1, EA4169, "Fundamental, clinical and therapeutic aspects of the skin barrier function", Lyon, France
| | - A B Rossi
- Pierre Fabre Dermo-Cosmétique Research & Development, Clinical Division, Toulouse, France.,Department of Dermatology, Toulouse University hospital, France
| | - M D Thouvenin
- Pierre Fabre Dermo-Cosmétique Research & Development, Clinical Division, Toulouse, France
| | - J Mangold
- Pierre Fabre Dermo-Cosmétique Research & Development, Clinical Division, Toulouse, France
| | - M F Galliano
- Pierre Fabre Dermo-Cosmétique Research & Development, Clinical Division, Toulouse, France.,Pierre Fabre Dermo-Cosmétique Research and Development Center, Pharmacology Division, Toulouse, France.,Pierre Fabre Dermo-Cosmétique, Pierre Fabre Research and Development Center, Pharmacology Division, Toulouse, France
| | - H Hernandez-Pigeon
- Pierre Fabre Dermo-Cosmétique Research & Development, Clinical Division, Toulouse, France.,Pierre Fabre Dermo-Cosmétique, Pierre Fabre Research and Development Center, Pharmacology Division, Toulouse, France
| | - M F Aries
- Pierre Fabre Dermo-Cosmétique Research and Development Center, Pharmacology Division, Toulouse, France.,Pierre Fabre Dermo-Cosmétique, Pierre Fabre Research and Development Center, Pharmacology Division, Toulouse, France
| | - C Rouvrais
- Pierre Fabre Dermo-Cosmétique Research & Development, Clinical Division, Toulouse, France
| | - S Bessou-Touya
- Pierre Fabre Dermo-Cosmétique Research & Development, Clinical Division, Toulouse, France.,Pierre Fabre Dermo-Cosmétique Research and Development Center, Pharmacology Division, Toulouse, France.,Medical Department, Pierre Fabre Research and Laboratoires Dermatologiques A-Derma, Lavaur, France.,Pierre Fabre Dermo-Cosmétique, Pierre Fabre Research and Development Center, Pharmacology Division, Toulouse, France
| | - H Duplan
- Pierre Fabre Dermo-Cosmétique Research & Development, Clinical Division, Toulouse, France.,Pierre Fabre Dermo-Cosmétique Research and Development Center, Pharmacology Division, Toulouse, France.,Pierre Fabre Dermo-Cosmétique, Pierre Fabre Research and Development Center, Pharmacology Division, Toulouse, France
| | - N Castex-Rizzi
- Pierre Fabre Dermo-Cosmétique Research & Development, Clinical Division, Toulouse, France.,Pierre Fabre Dermo-Cosmétique Research and Development Center, Pharmacology Division, Toulouse, France.,Pierre Fabre Dermo-Cosmétique, Pierre Fabre Research and Development Center, Pharmacology Division, Toulouse, France
| | - V Mengeaud
- Pierre Fabre Dermo-Cosmétique Research & Development, Clinical Division, Toulouse, France.,Pierre Fabre Dermo-Cosmétique Research and Development Center, Pharmacology Division, Toulouse, France
| | - P J Ferret
- Pierre Fabre Dermo-Cosmétique Research & Development, Toxicology Division, Vigoulet-Auzil, France.,Pierre Fabre Dermo-Cosmétique Research & Developement Center, Toxicology division, Vigoulet, France
| | - E Clouet
- Pierre Fabre Dermo-Cosmétique Research & Development, Toxicology Division, Vigoulet-Auzil, France.,Pierre Fabre Dermo-Cosmétique Research & Developement Center, Toxicology division, Vigoulet, France
| | | | - C Carrasco
- Pierre Fabre Dermo-Cosmétique Research & Development, Clinical Division, Toulouse, France.,Pierre Fabre Dermo-Cosmétique Research and Development Center, Pharmacology Division, Toulouse, France.,Pierre Fabre Dermo-Cosmétique, Pierre Fabre Research and Development Center, Pharmacology Division, Toulouse, France
| | - C Coutanceau
- Medical Department, Pierre Fabre Research and Laboratoires Dermatologiques A-Derma, Lavaur, France
| | - B Guiraud
- Pierre Fabre Dermo-Cosmétique Research & Development, Clinical Division, Toulouse, France
| | - S Boyal
- Windsor Clinical Research Inc., Windsor campus, Windsor, ON, Canada
| | - A Herman
- Department of Dermatology, Saint-Luc University Clinics, Brussels, Belgium
| | - H Delga
- Pierre Fabre Dermo-Cosmétique, Pierre Fabre Research and Development Center, Pharmacology Division, Toulouse, France
| | - K Biniek
- Department of Materials Science and Engineering, Stanford University hospital, Stanford, CA, USA
| | - R Dauskardt
- Department of Materials Science and Engineering, Stanford University hospital, Stanford, CA, USA
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Carrasco C, Medel P, Fuentetaja A, Ranilla MJ, Carro MD. Effect of disodium/calcium malate or supplementation on growth performance, carcass quality, ruminal fermentation products, and blood metabolites of heifers. J Anim Sci 2016; 94:4315-4325. [PMID: 27898871 DOI: 10.2527/jas.2016-0616] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The aim of this study was to assess the effects of malate salts and culture on growth performance, carcass quality, ruminal fermentation products, and blood metabolites in heifers raised under southern Europe practical farm conditions. A total of 108 Charolaise cross heifers (214 ± 27.3 kg BW and 6.4 ± 1.1 mo of age) were housed in 18 pens of 6 animals each and used in a 114-d feedlot study. There was a totally randomized experimental design, and 6 pens were assigned to each of the following experimental diets: a control (no supplementation), the control plus 4 g of disodium/calcium malate mixture per kilogram of concentrate (2.12 g malate/kg), and the control plus 0.15 g of CBS 493.94 per kilogram of concentrate (1.5 × 10 cfu/kg). The control diet consisted of wheat-barley-based pelleted concentrate (32% starch, DM basis) and full-length barley straw. Concentrate and straw were fed separately ad libitum (5% orts) in an 88:12 ratio. On Days 0, 56, and 114, ruminal fluid and blood samples were obtained from each heifer between 2 and 2.5 h after the morning feeding by ruminocentesis and tail venipuncture, respectively. Body weight, concentrate ADFI, and G:F were recorded at 28, 56, 84, and 114 d. At slaughter, hot carcass weight and yield and carcass classification were determined in 2 representative heifers per pen (12 animals per dietary treatment). Supplementation with malate salts or did not affect concentrate ADFI ( = 0.98), ADG ( = 0.74), or G:F ( = 0.50) at any time during the experiment. At slaughter, there were no differences in carcass weight ( = 0.86), classification ( = 0.18), or carcass yield ( = 0.84) among experimental groups. Also, there were no differences treatments on ruminal pH ( = 0.24), ruminal fermentation products ( = 0.69, = 0.88, and = 0.93 for total VFA, NH-N, and lactate, respectively), and blood metabolites ( = 0.96, = 0.82, and = 0.15 for glucose, urea N, and lactate, respectively). In conclusion, under the feeding and management conditions of this study, diet supplementation with malate salts or did not have any significant effects on growth performance, carcass quality, ruminal fermentation products, and blood metabolites.
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Galliano M, Carrasco C, Biniek K, Dauskardt R, Bessou-Touya S, Duplan H. 525 Effect of solar products containing the malted oat rhealba ® oil on skin barrier: Interest for fragile skin exposed to solar UV. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.06.548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Pastrana CL, Carrasco C, Akhtar P, Leuba SH, Khan SA, Moreno-Herrero F. Force and twist dependence of RepC nicking activity on torsionally-constrained DNA molecules. Nucleic Acids Res 2016; 44:8885-8896. [PMID: 27488190 PMCID: PMC5062986 DOI: 10.1093/nar/gkw689] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [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: 05/18/2016] [Accepted: 07/22/2016] [Indexed: 11/14/2022] Open
Abstract
Many bacterial plasmids replicate by an asymmetric rolling-circle mechanism that requires sequence-specific recognition for initiation, nicking of one of the template DNA strands and unwinding of the duplex prior to subsequent leading strand DNA synthesis. Nicking is performed by a replication-initiation protein (Rep) that directly binds to the plasmid double-stranded origin and remains covalently bound to its substrate 5′-end via a phosphotyrosine linkage. It has been proposed that the inverted DNA sequences at the nick site form a cruciform structure that facilitates DNA cleavage. However, the role of Rep proteins in the formation of this cruciform and the implication for its nicking and religation functions is unclear. Here, we have used magnetic tweezers to directly measure the DNA nicking and religation activities of RepC, the replication initiator protein of plasmid pT181, in plasmid sized and torsionally-constrained linear DNA molecules. Nicking by RepC occurred only in negatively supercoiled DNA and was force- and twist-dependent. Comparison with a type IB topoisomerase in similar experiments highlighted a relatively inefficient religation activity of RepC. Based on the structural modeling of RepC and on our experimental evidence, we propose a model where RepC nicking activity is passive and dependent upon the supercoiling degree of the DNA substrate.
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Affiliation(s)
- Cesar L Pastrana
- Department of Macromolecular Structures, Centro Nacional de Biotecnología, CSIC, Darwin 3, 28049 Cantoblanco, Madrid, Spain
| | - Carolina Carrasco
- Department of Macromolecular Structures, Centro Nacional de Biotecnología, CSIC, Darwin 3, 28049 Cantoblanco, Madrid, Spain
| | - Parvez Akhtar
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, 450 Technology Drive, Pittsburgh, PA 15219, USA
| | - Sanford H Leuba
- Department of Cell Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
| | - Saleem A Khan
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, 450 Technology Drive, Pittsburgh, PA 15219, USA
| | - Fernando Moreno-Herrero
- Department of Macromolecular Structures, Centro Nacional de Biotecnología, CSIC, Darwin 3, 28049 Cantoblanco, Madrid, Spain
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Galliano F, Carrasco C, Biniek K, Dauskardt R, Bessou-Touya S, Duplan H. 563 Assessment of solar products containing the malted oat rhealba ® oil on skin barrier: Interest for fragile skin under solar uv exposure. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.02.602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Gilhooly NS, Carrasco C, Gollnick B, Wilkinson M, Wigley DB, Moreno-Herrero F, Dillingham MS. Chi hotspots trigger a conformational change in the helicase-like domain of AddAB to activate homologous recombination. Nucleic Acids Res 2016; 44:2727-41. [PMID: 26762979 PMCID: PMC4824097 DOI: 10.1093/nar/gkv1543] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [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: 10/12/2015] [Accepted: 12/27/2015] [Indexed: 11/29/2022] Open
Abstract
In bacteria, the repair of double-stranded DNA breaks is modulated by Chi sequences. These are recognised by helicase-nuclease complexes that process DNA ends for homologous recombination. Chi activates recombination by changing the biochemical properties of the helicase-nuclease, transforming it from a destructive exonuclease into a recombination-promoting repair enzyme. This transition is thought to be controlled by the Chi-dependent opening of a molecular latch, which enables part of the DNA substrate to evade degradation beyond Chi. Here, we show that disruption of the latch improves Chi recognition efficiency and stabilizes the interaction of AddAB with Chi, even in mutants that are impaired for Chi binding. Chi recognition elicits a structural change in AddAB that maps to a region of AddB which resembles a helicase domain, and which harbours both the Chi recognition locus and the latch. Mutation of the latch potentiates the change and moderately reduces the duration of a translocation pause at Chi. However, this mutant displays properties of Chi-modified AddAB even in the complete absence of bona fide hotspot sequences. The results are used to develop a model for AddAB regulation in which allosteric communication between Chi binding and latch opening ensures quality control during recombination hotspot recognition.
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Affiliation(s)
| | - Carolina Carrasco
- Department of Macromolecular Structures, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Cientificas, 28049 Cantoblanco, Madrid, Spain
| | - Benjamin Gollnick
- Department of Macromolecular Structures, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Cientificas, 28049 Cantoblanco, Madrid, Spain
| | - Martin Wilkinson
- Institute of Cancer Research, Chester Beatty Laboratories, 237 Fulham Road, London SW3 6JB, UK Section of Structural Biology, Department of Medicine, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
| | - Dale B Wigley
- Institute of Cancer Research, Chester Beatty Laboratories, 237 Fulham Road, London SW3 6JB, UK Section of Structural Biology, Department of Medicine, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
| | - Fernando Moreno-Herrero
- Department of Macromolecular Structures, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Cientificas, 28049 Cantoblanco, Madrid, Spain
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Carrasco C. Valoración citológica vaginal en perras bajo cuatro métodos de tinción y su implicancia en el diagnóstico de neoplasias. SPERMOVA 2015. [DOI: 10.18548/aspe/0002.14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Carrasco C, Άlvarez J, Salazar J. AB0244 Correlation Between Serological and Clinical Markers in Rheumatoid Arthritis. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.6354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Gollnick B, Carrasco C, Zuttion F, Gilhooly NS, Dillingham MS, Moreno-Herrero F. Probing DNA helicase kinetics with temperature-controlled magnetic tweezers. Small 2015; 11:1273-84. [PMID: 25400244 PMCID: PMC4473356 DOI: 10.1002/smll.201402686] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Indexed: 05/04/2023]
Abstract
Motor protein functions like adenosine triphosphate (ATP) hydrolysis or translocation along molecular substrates take place at nanometric scales and consequently depend on the amount of available thermal energy. The associated rates can hence be investigated by actively varying the temperature conditions. In this article, a thermally controlled magnetic tweezers (MT) system for single-molecule experiments at up to 40 °C is presented. Its compact thermostat module yields a precision of 0.1 °C and can in principle be tailored to any other surface-coupled microscopy technique, such as tethered particle motion (TPM), nanopore-based sensing of biomolecules, or super-resolution fluorescence imaging. The instrument is used to examine the temperature dependence of translocation along double-stranded (ds)DNA by individual copies of the protein complex AddAB, a helicase-nuclease motor involved in dsDNA break repair. Despite moderately lower mean velocities measured at sub-saturating ATP concentrations, almost identical estimates of the enzymatic reaction barrier (around 21-24 k(B)T) are obtained by comparing results from MT and stopped-flow bulk assays. Single-molecule rates approach ensemble values at optimized chemical energy conditions near the motor, which can withstand opposing loads of up to 14 piconewtons (pN). Having proven its reliability, the temperature-controlled MT described herein will eventually represent a routinely applied method within the toolbox for nano-biotechnology.
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Affiliation(s)
- Benjamin Gollnick
- Centro Nacional de Biotecnología, CSIC, Darwin 3, Campus de Cantoblanco, 28049, Madrid, Spain
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Castex-Rizzi N, Galliano MF, Aries MF, Hernandez-Pigeon H, Vaissiere C, Delga H, Caruana A, Carrasco C, Lévêque M, Duplan H, Bessou-Touya S. In vitro approaches to pharmacological screening in the field of atopic dermatitis. Br J Dermatol 2015; 170 Suppl 1:12-8. [PMID: 24930566 DOI: 10.1111/bjd.13106] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/25/2014] [Indexed: 12/11/2022]
Abstract
In vitro models are valuable for evaluating potential active ingredients and other molecules used in medications for atopic dermatitis (AD). However, finding appropriate in vitro models can be problematic. Our strategy was to set up different in vitro models that would mimic the pathomechanisms of AD. We describe five such models - the AD keratinocyte model, the AD reconstructed human epidermis model, the adaptive immunity model, the innate immunity model and the pruritus model - which we have used to evaluate a new ingredient for emollients derived from a biological extract. The models chosen provide useful data for the pharmacological characterization of active ingredients in adjunctive treatments for AD.
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Affiliation(s)
- N Castex-Rizzi
- Pierre Fabre Dermo-Cosmétique, Pierre Fabre Research and Development Centre, 3 Avenue Hubert Curien BP13562, Toulouse CEDEX, 31035, France
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Carrasco C, Dillingham MS, Moreno-Herrero F. Single molecule approaches to monitor the recognition and resection of double-stranded DNA breaks during homologous recombination. DNA Repair (Amst) 2014; 20:119-129. [PMID: 24569169 DOI: 10.1016/j.dnarep.2014.02.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Revised: 01/31/2014] [Accepted: 02/01/2014] [Indexed: 11/30/2022]
Abstract
The fate of a cell depends on its ability to repair the many double-stranded DNA breaks (DSBs) that occur during normal metabolism. Improper DSB repair may result in genomic instability, cancer, or other genetic diseases. The repair of a DSB can be initiated by the recognition and resection of a duplex DNA end to form a 3'-terminated single-stranded DNA overhang. This task is carried out by different single-strand exonucleases, endonucleases, and helicases that work in a coordinated manner. This manuscript reviews the different single-molecule approaches that have been employed to characterize the structural features of these molecular machines, as well as the intermediates and products formed during the process of DSB repair. Imaging techniques have unveiled the structural organization of complexes involved in the tethering and recognition of DSBs. In addition to that static picture, single molecule studies on the dynamics of helicase-nuclease complexes responsible for the processive resection of DSBs have provided detailed mechanistic insights into their function.
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Affiliation(s)
- Carolina Carrasco
- Centro Nacional de Biotecnología, CSIC, Campus UAM, Darwin 3, Cantoblanco, 28049 Madrid, Spain
| | - Mark S Dillingham
- School of Biochemistry, Medical Sciences Building, University of Bristol, University Walk, Bristol BS8 1TD, UK
| | - Fernando Moreno-Herrero
- Centro Nacional de Biotecnología, CSIC, Campus UAM, Darwin 3, Cantoblanco, 28049 Madrid, Spain.
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Perez-Tejeda P, Jimenez-Ruiz A, Grueso EM, Prado-Gotor R, Carrasco C, Pastor A, Alvarez N, Garcia-Lora M, Garcia-Pageo M. Binding Study of the [Ru(NH3)5pz]2+Complex to Bile Anion Aggregates through Kinetic Measurements. INT J CHEM KINET 2013. [DOI: 10.1002/kin.20813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- P. Perez-Tejeda
- Department of Physical Chemistry, Faculty of Chemistry; Sevilla University; 41012 Sevilla Spain
| | - A. Jimenez-Ruiz
- Department of Physical Chemistry, Faculty of Chemistry; Sevilla University; 41012 Sevilla Spain
| | - E. M. Grueso
- Department of Physical Chemistry, Faculty of Chemistry; Sevilla University; 41012 Sevilla Spain
| | - R. Prado-Gotor
- Department of Physical Chemistry, Faculty of Chemistry; Sevilla University; 41012 Sevilla Spain
| | - C. Carrasco
- Department of Physical Chemistry, Faculty of Chemistry; Sevilla University; 41012 Sevilla Spain
| | - A. Pastor
- Department of Physical Chemistry, Faculty of Chemistry; Sevilla University; 41012 Sevilla Spain
| | - N. Alvarez
- Department of Physical Chemistry, Faculty of Chemistry; Sevilla University; 41012 Sevilla Spain
| | - M. Garcia-Lora
- Department of Physical Chemistry, Faculty of Chemistry; Sevilla University; 41012 Sevilla Spain
| | - M. Garcia-Pageo
- Department of Physical Chemistry, Faculty of Chemistry; Sevilla University; 41012 Sevilla Spain
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Herrero-Galán E, Fuentes-Perez ME, Carrasco C, Valpuesta JM, Carrascosa JL, Moreno-Herrero F, Arias-Gonzalez JR. Mechanical identities of RNA and DNA double helices unveiled at the single-molecule level. J Am Chem Soc 2012; 135:122-31. [PMID: 23214411 DOI: 10.1021/ja3054755] [Citation(s) in RCA: 103] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Double-stranded (ds) RNA is the genetic material of a variety of viruses and has been recently recognized as a relevant molecule in cells for its regulatory role. Despite that the elastic response of dsDNA has been thoroughly characterized in recent years in single-molecule stretching experiments, an equivalent study with dsRNA is still lacking. Here, we have engineered long dsRNA molecules for their individual characterization contrasting information with dsDNA molecules of the same sequence. It is known that dsRNA is an A-form molecule unlike dsDNA, which exhibits B-form in physiological conditions. These structural types are distinguished at the single-molecule level with atomic force microscopy (AFM) and are the basis to understand their different elastic response. Force-extension curves of dsRNA with optical and magnetic tweezers manifest two main regimes of elasticity, an entropic regime whose end is marked by the A-form contour-length and an intrinsic regime that ends in a low-cooperative overstretching transition in which the molecule extends to 1.7 times its A-form contour-length. DsRNA does not switch between the A and B conformations in the presence of force. Finally, dsRNA presents both a lower stretch modulus and overstretching transition force than dsDNA, whereas the electrostatic and intrinsic contributions to the persistence length are larger.
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Affiliation(s)
- Elías Herrero-Galán
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanociencia), Cantoblanco, 28049 Madrid, Spain
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Castaño J, Bouza R, Rodríguez-Llamazares S, Carrasco C, Vinicius R. Processing and characterization of starch-based materials from pehuen seeds (Araucaria araucana (Mol) K. Koch). Carbohydr Polym 2012. [DOI: 10.1016/j.carbpol.2011.12.008] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Gomes Rodrigues T, Higueras Suñe C, López Ojeda A, Viñals Viñals J, Serra Payró J, Palacín Porte J, Narváez García J, Carrasco C, Bermejo J. Versatilidad del colgajo de perforantes de la arteria sural y planificación quirúrgica mediante angioscanner. Cir plást iberolatinoam 2012. [DOI: 10.4321/s0376-78922012000100009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Martinez-Martin D, Carrasco C, Hernando-Perez M, de Pablo PJ, Gomez-Herrero J, Perez R, Mateu MG, Carrascosa JL, Kiracofe D, Melcher J, Raman A. Resolving structure and mechanical properties at the nanoscale of viruses with frequency modulation atomic force microscopy. PLoS One 2012; 7:e30204. [PMID: 22295076 PMCID: PMC3266245 DOI: 10.1371/journal.pone.0030204] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [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: 01/18/2011] [Accepted: 12/12/2011] [Indexed: 11/19/2022] Open
Abstract
Structural Biology (SB) techniques are particularly successful in solving virus structures. Taking advantage of the symmetries, a heavy averaging on the data of a large number of specimens, results in an accurate determination of the structure of the sample. However, these techniques do not provide true single molecule information of viruses in physiological conditions. To answer many fundamental questions about the quickly expanding physical virology it is important to develop techniques with the capability to reach nanometer scale resolution on both structure and physical properties of individual molecules in physiological conditions. Atomic force microscopy (AFM) fulfills these requirements providing images of individual virus particles under physiological conditions, along with the characterization of a variety of properties including local adhesion and elasticity. Using conventional AFM modes is easy to obtain molecular resolved images on flat samples, such as the purple membrane, or large viruses as the Giant Mimivirus. On the contrary, small virus particles (25-50 nm) cannot be easily imaged. In this work we present Frequency Modulation atomic force microscopy (FM-AFM) working in physiological conditions as an accurate and powerful technique to study virus particles. Our interpretation of the so called "dissipation channel" in terms of mechanical properties allows us to provide maps where the local stiffness of the virus particles are resolved with nanometer resolution. FM-AFM can be considered as a non invasive technique since, as we demonstrate in our experiments, we are able to sense forces down to 20 pN. The methodology reported here is of general interest since it can be applied to a large number of biological samples. In particular, the importance of mechanical interactions is a hot topic in different aspects of biotechnology ranging from protein folding to stem cells differentiation where conventional AFM modes are already being used.
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Affiliation(s)
- David Martinez-Martin
- Departamento Física de la Materia Condensada, Universidad Autónoma de Madrid, Madrid, Spain
| | - Carolina Carrasco
- Departamento Física de la Materia Condensada, Universidad Autónoma de Madrid, Madrid, Spain
- Centro Nacional de Biotecnología, CSIC, Madrid, Spain
| | | | - Pedro J. de Pablo
- Departamento Física de la Materia Condensada, Universidad Autónoma de Madrid, Madrid, Spain
| | - Julio Gomez-Herrero
- Departamento Física de la Materia Condensada, Universidad Autónoma de Madrid, Madrid, Spain
| | - Rebeca Perez
- Centro de Biología Molecular “Severo Ochoa” (CSIC), Madrid, Spain
| | | | | | - Daniel Kiracofe
- School of Mechanical Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana, United States of America
| | - John Melcher
- School of Mechanical Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana, United States of America
| | - Arvind Raman
- School of Mechanical Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana, United States of America
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Carrasco C, Yeeles JT, Dillingham MS, Moreno-Herrero F. Modulation of the Translocation Properties of a Model Helicase by DNA Damage and Sequence Content within the Track. Biophys J 2012. [DOI: 10.1016/j.bpj.2011.11.3331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
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Ganga MA, Salinas F, Ravanal C, García V, Carrasco C, Martínez C, Saavedra J. Cinnamic acid, ethanol and temperature interaction on coumarate decarboxylase activity and the relative expression of the putative cd gene in D. bruxellensis. ELECTRON J BIOTECHN 2011. [DOI: 10.2225/vol14-issue5-fulltext-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
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Schaap IAT, Carrasco C, de Pablo PJ, Schmidt CF. Kinesin walks the line: single motors observed by atomic force microscopy. Biophys J 2011; 100:2450-6. [PMID: 21575579 DOI: 10.1016/j.bpj.2011.04.015] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2010] [Revised: 04/04/2011] [Accepted: 04/05/2011] [Indexed: 12/14/2022] Open
Abstract
Motor proteins of the kinesin family move actively along microtubules to transport cargo within cells. How exactly a single motor proceeds on the 13 narrow lanes or protofilaments of a microtubule has not been visualized directly, and there persists controversy on the relative position of the two kinesin heads in different nucleotide states. We have succeeded in imaging Kinesin-1 dimers immobilized on microtubules with single-head resolution by atomic force microscopy. Moreover, we could catch glimpses of single Kinesin-1 dimers in their motion along microtubules with nanometer resolution. We find in our experiments that frequently both heads of one dimer are microtubule-bound at submicromolar ATP concentrations. Furthermore, we could unambiguously resolve that both heads bind to the same protofilament, instead of straddling two, and remain on this track during processive movement.
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Affiliation(s)
- Iwan A T Schaap
- Department of Physics and Astronomy, Vrije Universiteit Amsterdam, de Boelelaan, Amsterdam, The Netherlands
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Aguado-Giménez F, Piedecausa MA, Carrasco C, Gutiérrez JM, Aliaga V, García-García B. Do benthic biofilters contribute to sustainability and restoration of the benthic environment impacted by offshore cage finfish aquaculture? Mar Pollut Bull 2011; 62:1714-1724. [PMID: 21669446 DOI: 10.1016/j.marpolbul.2011.05.028] [Citation(s) in RCA: 4] [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] [Received: 03/09/2011] [Revised: 05/19/2011] [Accepted: 05/20/2011] [Indexed: 05/30/2023]
Abstract
Benthic biofilters were deployed under a cage fish farm and in two reference locations to assess the influence of the farm on the biofilters and the surroundings, as well as to verify the usefulness of this technology as a mitigation tool. The biofilters underneath the farm recruited a fouling community practically identical to that of the control biofilters, which included a variety of trophic strategies. The former showed a higher 15N enrichment, indicating that fouling beneath the farm was benefiting from the farm waste. The waste retention efficiency was low (0.02 g N m(-2) month(-1)) beneath the farm. Benthic biofilters aggregated demersal wild fish around and within them. Pelagic wild fish also frequently used the biofilters beneath the farm, forming compact shoals around them. The increased complexity of the habitat below the fish farm enhanced biodiversity, but this improvement did not lead to the recovery of the sediments around the biofilters.
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Affiliation(s)
- F Aguado-Giménez
- Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA), Estación de Acuicultura Marina, Puerto de San Pedro del Pinatar, 30740 Murcia, Spain.
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Carrasco C, Luque A, Hernando-Pérez M, Miranda R, Carrascosa JL, Serena PA, de Ridder M, Raman A, Gómez-Herrero J, Schaap IAT, Reguera D, de Pablo PJ. Built-in mechanical stress in viral shells. Biophys J 2011; 100:1100-8. [PMID: 21320456 DOI: 10.1016/j.bpj.2011.01.008] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2010] [Revised: 12/10/2010] [Accepted: 01/04/2011] [Indexed: 12/18/2022] Open
Abstract
Mechanical properties of biological molecular aggregates are essential to their function. A remarkable example are double-stranded DNA viruses such as the φ29 bacteriophage, that not only has to withstand pressures of tens of atmospheres exerted by the confined DNA, but also uses this stored elastic energy during DNA translocation into the host. Here we show that empty prolated φ29 bacteriophage proheads exhibit an intriguing anisotropic stiffness which behaves counterintuitively different from standard continuum elasticity predictions. By using atomic force microscopy, we find that the φ29 shells are approximately two-times stiffer along the short than along the long axis. This result can be attributed to the existence of a residual stress, a hypothesis that we confirm by coarse-grained simulations. This built-in stress of the virus prohead could be a strategy to provide extra mechanical strength to withstand the DNA compaction during and after packing and a variety of extracellular conditions, such as osmotic shocks or dehydration.
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Affiliation(s)
- C Carrasco
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Cientificas, Madrid, Spain
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Blázquez C, Chiarlone A, Sagredo O, Aguado T, Pazos MR, Resel E, Palazuelos J, Julien B, Salazar M, Börner C, Benito C, Carrasco C, Diez-Zaera M, Paoletti P, Díaz-Hernández M, Ruiz C, Sendtner M, Lucas JJ, de Yébenes JG, Marsicano G, Monory K, Lutz B, Romero J, Alberch J, Ginés S, Kraus J, Fernández-Ruiz J, Galve-Roperh I, Guzmán M. Loss of striatal type 1 cannabinoid receptors is a key pathogenic factor in Huntington's disease. ACTA ACUST UNITED AC 2010; 134:119-36. [PMID: 20929960 DOI: 10.1093/brain/awq278] [Citation(s) in RCA: 131] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Endocannabinoids act as neuromodulatory and neuroprotective cues by engaging type 1 cannabinoid receptors. These receptors are highly abundant in the basal ganglia and play a pivotal role in the control of motor behaviour. An early downregulation of type 1 cannabinoid receptors has been documented in the basal ganglia of patients with Huntington's disease and animal models. However, the pathophysiological impact of this loss of receptors in Huntington's disease is as yet unknown. Here, we generated a double-mutant mouse model that expresses human mutant huntingtin exon 1 in a type 1 cannabinoid receptor-null background, and found that receptor deletion aggravates the symptoms, neuropathology and molecular pathology of the disease. Moreover, pharmacological administration of the cannabinoid Δ(9)-tetrahydrocannabinol to mice expressing human mutant huntingtin exon 1 exerted a therapeutic effect and ameliorated those parameters. Experiments conducted in striatal cells show that the mutant huntingtin-dependent downregulation of the receptors involves the control of the type 1 cannabinoid receptor gene promoter by repressor element 1 silencing transcription factor and sensitizes cells to excitotoxic damage. We also provide in vitro and in vivo evidence that supports type 1 cannabinoid receptor control of striatal brain-derived neurotrophic factor expression and the decrease in brain-derived neurotrophic factor levels concomitant with type 1 cannabinoid receptor loss, which may contribute significantly to striatal damage in Huntington's disease. Altogether, these results support the notion that downregulation of type 1 cannabinoid receptors is a key pathogenic event in Huntington's disease, and suggest that activation of these receptors in patients with Huntington's disease may attenuate disease progression.
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Affiliation(s)
- Cristina Blázquez
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas, Huntington’s Disease and Ataxias Collaborative Project, 28040 Madrid, Spain
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45
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Laufer H, Borst D, Baker FC, Reuter CC, Tsai LW, Schooley DA, Carrasco C, Sinkus M. Identification of a juvenile hormone-like compound in a crustacean. Science 2010; 235:202-5. [PMID: 17778635 DOI: 10.1126/science.235.4785.202] [Citation(s) in RCA: 256] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Juvenile hormone (JH) has central roles in the regulation of insect development and reproduction but has not previously been identified in other arthropod classes. The hemolymph of a crustacean, Libinia emarginata (Leach), has now been analyzed for JH-like compounds. Samples contained 0.003 to 0.030 nanogram of JH III per milliliter and 10 to 50 nanograms of methyl farnesoate per milliliter; methyl farnesoate is a compound structurally related to JH III that has JH bioactivity. Several tissues were examined for synthesis and secretion of JH-like compounds. Of these tissues, only the mandibular organs produced and secreted JH III and methyl farnesoate. However, microchemical analysis revealed that this JH III was racemic, and thus likely an artifactual oxidation product of methyl farnesoate. Secretion of methyl farnesoate was related to reproduction in females, with the highest rates observed in Libinia near the end of the ovarian cycle when oocyte growth and vitellogenesis are greatest. These results indicate that JH-like compounds such as methyl farnesoate have regulatory roles in crustaceans.
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Carrasco C, Baudel H, Sendelius J, Modig T, Roslander C, Galbe M, Hahn-Hägerdal B, Zacchi G, Lidén G. SO2-catalyzed steam pretreatment and fermentation of enzymatically hydrolyzed sugarcane bagasse. Enzyme Microb Technol 2010. [DOI: 10.1016/j.enzmictec.2009.10.016] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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47
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Palazuelos J, Aguado T, Pazos MR, Julien B, Carrasco C, Resel E, Sagredo O, Benito C, Romero J, Azcoitia I, Fernández-Ruiz J, Guzmán M, Galve-Roperh I. Microglial CB2 cannabinoid receptors are neuroprotective in Huntington's disease excitotoxicity. Brain 2009; 132:3152-64. [DOI: 10.1093/brain/awp239] [Citation(s) in RCA: 277] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
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48
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Serena PA, Douas M, Marqués MI, Carrasco C, Pablo PJD, Miranda R, Carrascosa JL, Castellanos M, Mateu MG. MC simulations of water meniscus in nanocontainers: explaining the collapse of viral particles due to capillary forces. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/pssc.200881738] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Abstract
Eosinophilic cystitis is a low frequency disease, with less than 200 reported cases in the world. It is characterized by a bladder wall inflammation, mainly by eosinophils, with fibrosis and muscle necrosis areas. Its origin seems to be immunological, although the triggers are not well known. Several predispose factor have been described such as allergic diseases, bladder injuries, drugs, infections, etc. It affects patient of all ages, mainly adults. It presents with frecuency, haematuria and suprapubic pain. Other less frequent symptoms are disuria, urinary retention, nicturia, and enuresis. The laboratory study (urinalysis, urinalysis and haemogram) and radiology (ultrasound, intravenous pyelography, computed tomography and nuclear magnetic resonance) are non specific. The lesions observed in the cystoscopy could emulate other diseases, that why the proper diagnostic is the histological analysis. The management could be observation o antihistaminic, anti-inflammatory and corticoid treatment. In refractory cases, surgery is an alternative. In this work, two male adult cases are reported with their symptoms, studies and management.
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Affiliation(s)
- Luis F Ebel Sepulveda
- Servicio de Urología, Hospital Regional de Valdivia y Departamento de Urologia, Universidad Austral de Chile.
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Ebel Sepulveda LF, Foneron A, Troncoso L, Cañoles R, Carrasco C, Hornig A, Gil G, Corti D. Cistitis eosinofílica: revisión y reporte de dos casos. Actas Urol Esp 2009. [DOI: 10.4321/s0210-48062009000400018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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