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Ossowski MS, Gallardo JP, Niborski LL, Rodríguez-Durán J, Lapadula WJ, Juri Ayub M, Chadi R, Hernandez Y, Fernandez ML, Potenza M, Gómez KA. Characterization of Novel Trypanosoma cruzi-Specific Antigen with Potential Use in the Diagnosis of Chagas Disease. Int J Mol Sci 2024; 25:1202. [PMID: 38256275 PMCID: PMC10816184 DOI: 10.3390/ijms25021202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 11/30/2023] [Accepted: 12/05/2023] [Indexed: 01/24/2024] Open
Abstract
Chagas disease is caused by the parasite Trypanosoma cruzi. In humans, it evolves into a chronic disease, eventually resulting in cardiac, digestive, and/or neurological disorders. In the present study, we characterized a novel T. cruzi antigen named Tc323 (TcCLB.504087.20), recognized by a single-chain monoclonal antibody (scFv 6B6) isolated from the B cells of patients with cardiomyopathy related to chronic Chagas disease. Tc323, a ~323 kDa protein, is an uncharacterized protein showing putative quinoprotein alcohol dehydrogenase-like domains. A computational molecular docking study revealed that the scFv 6B6 binds to an internal domain of Tc323. Immunofluorescence microscopy and Western Blot showed that Tc323 is expressed in the main developmental forms of T. cruzi, localized intracellularly and exhibiting a membrane-associated pattern. According to phylogenetic analysis, Tc323 is highly conserved throughout evolution in all the lineages of T. cruzi so far identified, but it is absent in Leishmania spp. and Trypanosoma brucei. Most interestingly, only plasma samples from patients infected with T. cruzi and those with mixed infection with Leishmania spp. reacted against Tc323. Collectively, our findings demonstrate that Tc323 is a promising candidate for the differential serodiagnosis of chronic Chagas disease in areas where T. cruzi and Leishmania spp. infections coexist.
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Affiliation(s)
- Micaela S. Ossowski
- Instituto de Investigaciones en Ingeniería Genética y Biología Molecular “Dr. Héctor N. Torres” (INGEBI-CONICET), Buenos Aires 1428, Argentina; (M.S.O.); (J.P.G.); (L.L.N.); (J.R.-D.)
| | - Juan Pablo Gallardo
- Instituto de Investigaciones en Ingeniería Genética y Biología Molecular “Dr. Héctor N. Torres” (INGEBI-CONICET), Buenos Aires 1428, Argentina; (M.S.O.); (J.P.G.); (L.L.N.); (J.R.-D.)
| | - Leticia L. Niborski
- Instituto de Investigaciones en Ingeniería Genética y Biología Molecular “Dr. Héctor N. Torres” (INGEBI-CONICET), Buenos Aires 1428, Argentina; (M.S.O.); (J.P.G.); (L.L.N.); (J.R.-D.)
| | - Jessica Rodríguez-Durán
- Instituto de Investigaciones en Ingeniería Genética y Biología Molecular “Dr. Héctor N. Torres” (INGEBI-CONICET), Buenos Aires 1428, Argentina; (M.S.O.); (J.P.G.); (L.L.N.); (J.R.-D.)
| | - Walter J. Lapadula
- Instituto Multidisciplinario de Investigaciones Biológicas de San Luis (IMIBIO-SL-CONICET), Facultad de Química Bioquímica y Farmacia, Universidad Nacional de San Luis, San Luis 5700, Argentina; (W.J.L.); (M.J.A.)
| | - Maximiliano Juri Ayub
- Instituto Multidisciplinario de Investigaciones Biológicas de San Luis (IMIBIO-SL-CONICET), Facultad de Química Bioquímica y Farmacia, Universidad Nacional de San Luis, San Luis 5700, Argentina; (W.J.L.); (M.J.A.)
| | - Raúl Chadi
- Hospital General de Agudos “Dr. Ignacio Pirovano”, Buenos Aires 1430, Argentina;
| | - Yolanda Hernandez
- Instituto Nacional de Parasitología “Dr. Mario Fatala Chaben”, Buenos Aires 1063, Argentina; (Y.H.); (M.L.F.)
| | - Marisa L. Fernandez
- Instituto Nacional de Parasitología “Dr. Mario Fatala Chaben”, Buenos Aires 1063, Argentina; (Y.H.); (M.L.F.)
| | - Mariana Potenza
- Instituto de Investigaciones en Ingeniería Genética y Biología Molecular “Dr. Héctor N. Torres” (INGEBI-CONICET), Buenos Aires 1428, Argentina; (M.S.O.); (J.P.G.); (L.L.N.); (J.R.-D.)
| | - Karina A. Gómez
- Instituto de Investigaciones en Ingeniería Genética y Biología Molecular “Dr. Héctor N. Torres” (INGEBI-CONICET), Buenos Aires 1428, Argentina; (M.S.O.); (J.P.G.); (L.L.N.); (J.R.-D.)
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Biggs M, Ehrenreich K, Morris N, Blanchard K, Bustamante C, Choimorrow S, Hauser D, Hernandez Y, Kapp N, Kromenaker T, Moayedi G, Perritt J, Ralph L, Raymond E, Valladares E, White K, Grossman D. Comprehension of an Over-the-counter Drug Facts Label Prototype for a Mifepristone and Misoprostol Medication Abortion Product. Contraception 2022. [DOI: 10.1016/j.contraception.2022.03.010] [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: 11/29/2022]
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Rico J, Castaño-Soto M, Lopez-Arango N, Hernandez Y. Influence of C=O groups on the optical extinction coefficient of graphene exfoliated in liquid phase. J Phys Condens Matter 2021; 34:105701. [PMID: 34874310 DOI: 10.1088/1361-648x/ac3fd6] [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] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 12/03/2021] [Indexed: 06/13/2023]
Abstract
Liquid phase exfoliation of graphite is currently one of the most promising graphene production methods at large scale. For this reason, an accurate calculation of the concentration in graphene dispersions is important for standardization and commercialization. Here, graphene dispersions, at high concentrations, were produced by electrochemical exfoliation. Furthermore, a cleaner methodology to obtain graphene oxide by electrochemical exfoliation at high acid concentrations was implemented. The absorption coefficient for graphene and graphene oxide was determined in the optical range (α660 nm= 1414 (±3%) ml mg-1 m-1andα660 nm= 648 (±7%) ml mg-1 m-1, respectively) with an exponential dependence with the wavelength. The difference inαfor both materials is attributed to an increased presence of C=O groups as evidenced by Fourier transform infrared spectroscopy (FTIR), UV-vis and Raman spectroscopy, as well as, in the calculation of the optical extinction coefficient and optical band-gap via Tauc-plots.
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Affiliation(s)
- J Rico
- Nanomaterials Laboratory, Physics Department, Universidad de Los Andes, Bogotá 111711, Colombia
| | - M Castaño-Soto
- Nanomaterials Laboratory, Physics Department, Universidad de Los Andes, Bogotá 111711, Colombia
| | - N Lopez-Arango
- Nanomaterials Laboratory, Physics Department, Universidad de Los Andes, Bogotá 111711, Colombia
| | - Y Hernandez
- Nanomaterials Laboratory, Physics Department, Universidad de Los Andes, Bogotá 111711, Colombia
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López L, Chiribao ML, Girard MC, Gómez KA, Carasi P, Fernandez M, Hernandez Y, Robello C, Freire T, Piñeyro MD. The cytosolic tryparedoxin peroxidase from Trypanosoma cruzi induces a pro-inflammatory Th1 immune response in a peroxidatic cysteine-dependent manner. Immunology 2021; 163:46-59. [PMID: 33410127 PMCID: PMC8044337 DOI: 10.1111/imm.13302] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 11/25/2020] [Accepted: 12/19/2020] [Indexed: 12/25/2022] Open
Abstract
Trypanosoma cruzi cytosolic tryparedoxin peroxidase (c-TXNPx) is a 2-Cys peroxiredoxin (Prx) with an important role in detoxifying host cell oxidative molecules during parasite infection. c-TXNPx is a virulence factor, as its overexpression enhances parasite infectivity and resistance to exogenous oxidation. As Prxs from other organisms possess immunomodulatory properties, we studied the effects of c-TXNPx in the immune response and analysed whether the presence of the peroxidatic cysteine is necessary to mediate these properties. To this end, we used a recombinant c-TXNPx and a mutant version (c-TXNPxC52S) lacking the peroxidatic cysteine. We first analysed the oligomerization profile, oxidation state and peroxidase activity of both proteins by gel filtration, Western blot and enzymatic assay, respectively. To investigate their immunological properties, we analysed the phenotype and functional activity of macrophage and dendritic cells and the T-cell response by flow cytometry after injection into mice. Our results show that c-TXNPx, but not c-TXNPxC52S, induces the recruitment of IL-12/23p40-producing innate antigen-presenting cells and promotes a strong specific Th1 immune response. Finally, we studied the cellular and humoral immune response developed in the context of parasite natural infection and found that only wild-type c-TXNPx induces proliferation and high levels of IFN-γ secretion in PBMC from chronic patients without demonstrable cardiac manifestations. In conclusion, we demonstrate that c-TXNPx possesses pro-inflammatory properties that depend on the presence of peroxidatic cysteine that is essential for peroxidase activity and quaternary structure of the protein and could contribute to rational design of immune-based strategies against Chagas disease.
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Affiliation(s)
- Lucía López
- Laboratorio de Inmunomodulación y Desarrollo de VacunasDepartamento de InmunobiologíaFacultad de MedicinaUniversidad de La RepúblicaMontevideoUruguay
- Unidad de Biología MolecularInstitut Pasteur MontevideoMontevideoUruguay
| | - María Laura Chiribao
- Unidad de Biología MolecularInstitut Pasteur MontevideoMontevideoUruguay
- Departamento de BioquímicaFacultad de MedicinaUniversidad de La RepúblicaMontevideoUruguay
| | - Magalí C. Girard
- Laboratorio de Inmunología de las Infecciones por TripanosomátidosInstituto de Investigaciones en Ingeniería Genética y Biología Molecular (INGEBI‐CONICET)Buenos AiresArgentina
| | - Karina A. Gómez
- Laboratorio de Inmunología de las Infecciones por TripanosomátidosInstituto de Investigaciones en Ingeniería Genética y Biología Molecular (INGEBI‐CONICET)Buenos AiresArgentina
| | - Paula Carasi
- Laboratorio de Inmunomodulación y Desarrollo de VacunasDepartamento de InmunobiologíaFacultad de MedicinaUniversidad de La RepúblicaMontevideoUruguay
| | - Marisa Fernandez
- Instituto Nacional de Parasitología ‘Doctor Mario Fatala Chabén’Buenos AiresArgentina
| | - Yolanda Hernandez
- Instituto Nacional de Parasitología ‘Doctor Mario Fatala Chabén’Buenos AiresArgentina
| | - Carlos Robello
- Unidad de Biología MolecularInstitut Pasteur MontevideoMontevideoUruguay
- Departamento de BioquímicaFacultad de MedicinaUniversidad de La RepúblicaMontevideoUruguay
| | - Teresa Freire
- Laboratorio de Inmunomodulación y Desarrollo de VacunasDepartamento de InmunobiologíaFacultad de MedicinaUniversidad de La RepúblicaMontevideoUruguay
| | - María Dolores Piñeyro
- Unidad de Biología MolecularInstitut Pasteur MontevideoMontevideoUruguay
- Departamento de BioquímicaFacultad de MedicinaUniversidad de La RepúblicaMontevideoUruguay
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Patterson F, Brewer B, Hernandez Y, Mayberry S, Satti A, Zantah M, Gangemi A, Grandner M. DUAL SMOKING AND VAPING ASSOCIATED WITH GREATER SLEEP DISTURBANCES. Chest 2020. [DOI: 10.1016/j.chest.2020.05.487] [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] Open
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Nunez Rodriguez A, Hernandez Y, Guzmán G, Jiménez Martinez M, Jimenez M, Guzman G, Hernandez Y, Nunez A. Analysis of Applied Behavior Treatment for Children with Autism Spectrum Disorder. Eur Psychiatry 2017. [DOI: 10.1016/j.eurpsy.2017.01.2202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
According to Boesch et al., people with autism spectrum disorder (ASD) are at a greater risk of developing harmful behaviors, such as self-aggression and other challenging behaviors than individuals with normal development do not exhibit. The method of approach that is supported by scientific evidence for interventional procedures is applied behavior analysis, reported by Carr et al. [1].AimIn order to provide evidence-based intervention for autism from this approach in practice.MethodIn reference to a longitudinal approach, an intervention program was designed and implemented to serve 40 children with ASD, who were treated for one (1) year at the Victory BRT Institute in Florida, US. The behaviors targeted for reduction (excess behavioral), are the following: physical aggression, self-aggression and non-compliance. The program began with a baseline (12 consecutive days) with observations at home and others different natural contexts. The last three (3) months of the year consisted of monthly follow-up sessions to monitor the treatment implemented. The results were analyzed by repeated measures, ANOVA Sig (P = 0.003) (F = 8). Analyses show that the critical level associated with the effect of time-content interaction is strong, so the treatment generated a positive effect by reducing the behaviors targeted in time.ConclusionsThese results provide evidence that interventions from applied behavior analysis are effective.Disclosure of interestThe authors have not supplied their declaration of competing interest.
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Andreana M, Labruyère A, Tonello A, Wabnitz S, Leproux P, Couderc V, Duterte C, Cserteg A, Bertrand A, Hernandez Y, Giannone D, Hilaire S, Huss G. Control of near-infrared supercontinuum bandwidth by adjusting pump pulse duration. Opt Express 2012; 20:10750-10760. [PMID: 22565699 DOI: 10.1364/oe.20.010750] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We experimentally and numerically investigated the impact of input pump pulse duration on the near-infrared bandwidth of supercontinuum generation in a photonic crystal fiber. We continuously stretched the temporal duration of the input pump laser (centered at 1030 nm) pulses from 500 fs up to 10 ps, while keeping fixed the pump peak power. We observed that the long-wavelength edge of the supercontinuum spectrum is increased by 200 nm as the pump pulse duration grows from 500 fs to 10 ps. We provide a quantitative fit of the experimental results by means of numerical simulations. Moreover, we have explained the observed spectral broadening enhancement induced by pump pulse energy by developing an approximate yet fully analytical model for soliton energy exchange through a series of collisions in the presence of stimulated Raman scattering.
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Affiliation(s)
- M Andreana
- Université de Limoges, XLIM, UMR CNRS 7252, Limoges, France
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VELAZQUEZ V, DiGiorgi B, Hernandez Y. Misconceptions About Shellfish Allergies And Iodine Radicontrast Media Administration. J Allergy Clin Immunol 2011. [DOI: 10.1016/j.jaci.2010.12.774] [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: 10/18/2022]
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Olvera RL, Pliszka SR, Konyecsni WM, Hernandez Y, Farnum S, Tripp RF. Validation of the Interview Module for Intermittent Explosive Disorder (M-IED) in children and adolescents: a pilot study. Psychiatry Res 2001; 101:259-67. [PMID: 11311929 DOI: 10.1016/s0165-1781(01)00224-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We identified a subset of impulsive, aggressive children as having symptoms that met criteria for Intermittent Explosive Disorder (IED) using the Interview Module for Intermittent Explosive Disorder (M-IED). The M-IED was administered to 34 children and adolescents between the ages of 10 and 17. These data provide initial evidence for the M-IED as a useful instrument in the diagnosis of IED in adolescents. The M-IED displayed a high level of inter-rater reliability and adequate test-retest reliability. Construct validity was supported by the fact that the subjects with IED symptomatology had significantly more lifetime aggression, oppositionality, inattention and hyperactivity/impulsivity compared to community controls. In addition, the subjects with IED symptomatology had a significantly greater number of episodes of lifetime physical aggression and documented episodes of aggression while in residential treatment compared to psychiatric controls. The subjects with IED symptomatology had a greater number of positive screening questions for DSM-IV diagnoses using the Swanson, Nolan and Pelham questionnaire (SNAP-IV), particularly those related to IED and posttraumatic stress disorder than psychiatric controls.
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Affiliation(s)
- R L Olvera
- Division of Child and Adolescent Psychiatry, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, TX San Antonio 78284-7792, USA.
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Subramanian VA, Hernandez Y, Tack-Goldman K, Grabowski EF, Weksler BB. Prostacyclin production by internal mammary artery as a factor in coronary artery bypass grafts. Surgery 1986; 100:376-83. [PMID: 3488598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Long-term patency of coronary artery bypass grafts (CABG) with internal mammary artery (IMA) is better than with saphenous vein (SV) grafts. To determine if vascular prostacyclin (PGI2) produced by IMA might contribute to the improved outcome, we compared PGI2 generated by IMA and SV fragments from 26 patients undergoing CABG and tested the effect of preoperative, long-term ingestion of of aspirin. Fresh tissues were incubated in buffer +/- 25 mumol/L of sodium arachidonate at 37 degrees C for 5 minutes to stimulate PGI2 production, measured by radioimmunoassay of its major hydrolytic product, 6-keto-PGF1 alpha. Results were expressed in picograms of 6-keto-PGF1 alpha per milligram tissue wet weight for total PGI2 production by vascular segments and picograms per cm2 surface area for endothelial PGI2 production. Endothelial PGI2 production was compared for IMA and SV in template-stirring chambers that exposed only the luminal surface of the vessel, excluding underlying smooth muscle. Endothelial PGI2 production by IMA was significantly higher than production by SV under both basal (mechanical stimulation only 1436 +/- 224 versus 842 +/- 227 pg/cm2, mean +/- SEM, p greater than 0.05) and stimulated (25 mumol/L sodium arachidonate: 3343 +/- 347 versus 2032 +/- 465 pg/cm2, p less than 0.025) conditions in patients not receiving aspirin. For patients receiving aspirin, endothelial PGI2 production by IMA was significantly higher than production by SV in stimulated conditions (1382 +/- 526 versus 683 +/- 124 pg/cm2, p less than 0.05). Histologic examination of the tissue segments revealed intact endothelium after incubation in both IMA and SV. Thus a high capacity for PGI2 synthesis and diminished inhibition of PGI2 after aspirin were demonstrated for IMA compared with SV tissue and may be a factor in the improved patency of IMA grafts.
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