Costa B, Li Calzi M, Castellano M, Blanco V, Cuevasanta E, Litvan I, Ivanov P, Witwer K, Cayota A, Tosar J.P.* (2023). Nicked tRNAs are stable reservoirs of tRNA halves in cells and biofluids. P.N.A.S., 120(4) e2216330120 DOI. PubMed
Comentado en: Staying together after the breakup: tRNA halves in extracellular fluids
Tosar JP*, Cayota A, Witwer K (2022). Exomeres and Supermeres: monolithic or diverse? Journal of Extracellular Biology. DOI. PubMed
Mateescu B, Jones J, Alexander R, et al. (2022). Phase 2 of extracellular RNA communication consortium charts next-generation approaches for extracellular RNA research. iScience. DOI. PubMed
Marquez ME, Sernbo S, Payque E, Uria R, Tosar JP, Querol J, Berca C, Uriepero A, Prieto D, Álvarez D, Oliver C, Irigoin V, Dos Santos G, Guillermo C, Landoni AI, Navarrete M, Palacios F, Oppezzo P (2022). TGF-β/SMAD Pathway Is Modulated by miR-26b-5p: Another Piece in the Puzzle of Chronic Lymphocytic Leukemia Progression. Cancers 14 (7), 1676. DOI.
Tosar JP* (2022). Costo de los cargos por procesamiento de artículo (APC) para Uruguay: el precio desmedido del acceso abierto. Informatio 27 (1), 221-252. Scielo.org.
Alexander RP, Kitchen RR, Tosar JP, Roth M, Mestdagh P, Max KEA, Rozowsky J, Kaczor-Urbanowicz KE, Chang J, Balaj L, Losic B, Van Nostrand EL, LaPlante E, Mateescu B, White BS, Yu R, Milosavljevic A, Stolovitzky G, Spengler RM. (2022) Open Problems in Extracellular RNA Data Analysis: Insights From an ERCC Online Workshop. Frontiers in Genetics 12:778416. DOI. PubMed.
Fagúndez P, Botasini S, Tosar JP, Méndez E (2021) Systematic process evaluation of the conjugation of proteins to gold nanoparticles. Heliyon 7 (6): e07392. DOI. PubMed.
Tosar JP, Ivanov P, Ribas de Pouplana L, Torres AG (2021) Editorial: Understanding the Importance of Non-Canonical tRNA Function. Frontiers in Molecular Biosciences 8: 769784. DOI. PubMed.
Tosar JP* (2021) Die hard: resilient RNAs in the blood. Nature Reviews Molecular Cell Biology. DOI. PubMed
Tosar JP*, Gámbaro F, Castellano M, Cayota A (2021) RI-SEC-seq: Comprehensive Profiling of Nonvesicular Extracellular RNAs with Different Stabilities. Bio-protocol. DOI. PubMed
Arab T, Mallick E, Huang Y, Dong L, Liao Z, Zhao Z, Gololobova O, Smith B, Haughey N, Pienta K, Slusher B, Tarwater P, Tosar JP, Zivkovic A, Vreeland W, Paulaitis M, Witwer KW (2021) Characterization of extracellular vesicles and synthetic nanoparticles with four orthogonal single-particle analysis platforms. Journal of Extracellular Vesicles 10(6): e12079. DOI. PubMed
Tosar JP*, Witwer KW, Cayota A (2021) Revisiting Extracellular RNA Release, Processing, and Function. Trends in Biochemical Sciences. DOI. PubMed
Tosar JP*, García-Silva MR, Cayota A (2021) Circulating SNORD57 rather than piR-54265 is a promising biomarker for colorectal cancer: common pitfalls in the study of somatic piRNAs in cancer. RNA 27(4): 403-410. DOI. PubMed
Tosar JP*, Segovia M, Castellano M, Gámbaro F, Akiyama Y, Fagúndez P, Olivera A, Costa B, Possi T, Hill M, Ivanov P, Cayota A* (2020) Fragmentation of extracellular ribosomes and tRNAs shapes the extracellular RNAome. Nucleic Acids Research 48(22): 12874-12888, DOI. PubMed
Tosar JP*, Cayota A* (2020) Extracellular tRNAs and tRNA-derived fragments. RNA Biology 17(8): 1149 - 1167. DOI. PubMed
Fagúndez P, Brañas G, Laíz J, Tosar JP.* (2020) Electrochemical Detection of dsDNA-Specific Antibodies. Methods in Molecular Biology 2063: 73-83, DOI. PubMed
Gámbaro F, Li Calzi M, Fagúndez P, Costa B, Greif G, Mallick E, Lyons S, Ivanov P, Witwer K, Cayota A*, Tosar JP.* (2020) Stable tRNA halves can be sorted into extracellular vesicles and delivered to recipient cells in a concentration-dependent manner. RNA Biology 17(8): 1168 - 1182. DOI. PubMed
Fernández-Calero T, Davyt M, Perelmuter K, Chalar C, Bampi G, Persson H, Tosar JP, Hafstao V, Naya H, Rovira C, Bollati-Fogolin M, Ehrlich R, Flouriot G, Ignatova Z, Marín M (2020) Fine-tuning the metabolic rewiring and adaptation of translational machinery during an epithelial-mesenchymal transition in breast cancer cells. Cancer & Metabolism 8, 8. DOI. PubMed.
Fromm B, Tosar JP, Aguilera F, Friedländer MR, Bachmann L, Hejnol A (2019) Evolutionary Implications of the microRNA- and piRNA Complement of Lepidodermella squamata (Gastrotricha). Non-Coding RNA 5, e19. DOI. PubMed
Fromm B, Kang W, Rovira C, Cayota A, Witwer KW*, Friedländer M*, Tosar JP* (2019) Plant microRNAs in human sera are likely contaminants. Journal of Nutritional Biochemistry 65: 139-140. DOI. PubMed
Théry C, Witwer K, et al. (2018) Minimal information for studies of extracellular vesicles 2018 (MISEV2018): a position statement of the International Society for Extracellular Vesicles and update of the MISEV2014 guidelines. Journal of Extracellular Vesicles 7 (1), e1535750. DOI. PubMed
Tosar JP,*; Gámbaro F, Darré L, Pantano S, Westhof E, Cayota A* (2018) Dimerization confers increased stability to nucleases in extracellular 5’ halves from glycine and glutamic acid tRNAs. Nucleic Acids Research 46 (17), 9081-9093. DOI. PubMed
Fromm B, Tosar JP, Yu L, Halushka M, Witwer K (2018). Human and Cow Have Identical miR-21-5p and miR-30a-5p Sequences, Which Are Likely Unsuited to Study Dietary Uptake from Cow Milk. Journal of Nutrition, 148 (9), 1506-1507. DOI. PubMed
Tosar JP, Cayota A (2018) Detection and analysis of non-vesicular extracellular RNA. Methods in Molecular Biology 1740: 125-137. DOI. PubMed
Fagúndez P, Brañas G, Cairoli E, Laíz J, Tosar JP* (2018). An electrochemical biosensor for rapid detection of anti-dsDNA antibodies in absolute scale. Analyst 143:3874-3882. DOI. PubMed
Tosar JP*, Rovira C, Cayota A (2018) Non-coding RNA fragments account for the majority of annotated piRNAs expressed in somatic non-gonadal tissues. Communications Biology 1, e2. DOI. PubMed
Tosar JP, Cayota A, Eitan E, Halushka MK, Witwer KW (2017) Ribonucleic artefacts: are some extracellular RNA discoveries driven by cell culture medium components? Journal of Extracellular Vesicles 6 (1), e1272832. DOI. PubMed
Mateescu B, Kowal EJK, van Balkom BWM, et al. (2017) Obstacles and opportunities in the functional analysis of extracellular vesicle RNA–an ISEV position paper. Journal of Extracellular Vesicles 6 (1), e1286095. DOI. PubMed
Doldán X, Fagúndez P, Cayota A, Laíz J, Tosar JP* (2016) Electrochemical sandwich immunosensor for determination of exosomes based on surface marker-mediated signal amplification. Analytical Chemistry 88 (21): 10466-10473. DOI. PubMed
Tosar JP, Gámbaro F, Sanguinetti J, Bonilla B, Witwer KW, Cayota A (2015) Assessment of small RNA sorting into different extracellular fractions revealed by high-throughput sequencing of breast cell lines. Nucleic Acids Research 43 (11): 5601-5616. DOI. PubMed
Tosar, J.P.; Rovira, C.; Naya, H.; Cayota, A. (2014) Mining of public sequencing datasets supports a non-dietary origin for putative foreign miRNAs: underestimated effects of contamination in NGS. RNA 20 (6): 754-757. DOI. PubMed
Tosar JP, Holmes J, Collyer S, Davis F, Laíz J,* Higson H (2013) Template and catalytic effects of DNA in the construction of polypyrrole/DNA composite macro and microelectrodes. Biosensors & Bioelectronics, 41: 294-301. DOI. PubMed
Tosar JP, Brañas G, Laíz J* (2010). Electrochemical DNA hybridization sensors applied to real and complex biological samples. Biosensors & Bioelectronics 26 (4): 1205-1217. DOI. PubMed
García-Silva M.R.1; Tosar, J.P1.; Frugier, M.; Pantano, S.; Bonilla, B.; Esteban, L.; Serra, E.; Rovira, C.; Robello, C.; Cayota, A. (2010) Cloning, characterization and subcellular localization of a trypanosoma cruzi argonaute protein defining a new subfamily distinctive of trypanosomatids . Gene 466: 26 - 35. DOI. PubMed
García-Silva M.R.; Frugier, M.; Tosar, J.P.; Correa Dominguez, A.; Ronalte Alvez, L.; Parodi-Talice, A.; Rovira, C.; Robello, C.; Goldenberg, S.; Cayota, A (2010) A population of tRNA-derived small RNAs is actively produced in Trypanosoma cruzi and recruited to cytoplasmic granules. Molecular and Biochemical Parasitology 171 (2): 64 – 73. DOI. PubMed
Keel K, Tosar J.P, Laíz J* (2010) Desarrollo de superficies modificadas oro – anticuerpo anti-PSPB para su uso como biosensor en la detección de preñez bovina. INNOTEC 5: 29-33. ISSN 1688-6593.
Tosar JP, Keel K, Laíz J* (2009) Two independent label-free detection methods in one electrochemical DNA sensor. Biosensors & Bioelectronics 24 (10): 3036 – 3042. DOI. PubMed
2023 - 2027: Aplicaciones diagnósticas y terapéuticas del ARN extracelular. Responsable: Juan Pablo Tosar. Co-responsable: Alfonso Cayota. Proyecto CSIC - Grupos. CSIC, Universidad de la República.
2022 - 2024: Decodificación del ARN extracelular por sensores de la inmunidad innata. Responsable: Juan Pablo Tosar. Proyecto Fondo Clemente Estable, Modalidad I , ANII
2022: Método para aislar, reparar, amplificar y/o secuenciar ARNs extracelulares no vesiculares estables presentes en fluídos biológicos humanos. Responsable: Juan Pablo Tosar. Programa de Apoyo al Patentamiento, ANII
2021: Caracterización de nanopartículas con alta resolución: sensor de pulsos resistivos (MRPS) para potenciar la investigación básica y clínica en biofármacos, nanotecnología, virología, biología molecular y bioquímica analítica. Responsable: Juan Pablo Tosar. Programa de Fortalecimiento del Equipamiento de Investigación de Servicios de la UdelaR. CSIC, Universidad de la República.
2021-2023: Biogénesis de ARNs extracelulares y su rol en la comunicación intercelular. PI: Juan Pablo Tosar. CSIC, Universidad de la República, Uruguay.
2019-2021: Secreción de ARNs constitutivos de la maquinaria traduccional como mecanismo de respuesta al estrés celular. Responsable: Juan Pablo Tosar. Proyecto Fondo Clemente Estable (mod. II), ANII.
2019 - 2021: Separation methods for exRNA carriers: extracellular vesicles, lipoprotein particles, and protein aggregates. Responsable: Kenneth Witwer. Rol: Key Personnel / Co-PI. NIH Extracellular RNA Communication Consortium. National Institutes of Health, EEUU.
2017-2019: Biosensores para la detección descentralizada de exosomas y virus del Dengue. Responsable: Juan Pablo Tosar. Proyectos CSIC I+D, Universidad de la República.
2013 - 2015: ARNs extracelulares y cáncer: caracterización e implicancias en la modulación recíproca entre células malignas y no malignas. Responsable: Juan Pablo Tosar. Proyecto Fondo Clemente Estable (mod. III), ANII.
2011 - 2013: Desarrollo de un genosensor basado en un nuevo método de detección directa sobre la base de la interacción guanina/polipirrol e implementación en muestras biológicas complejas. Responsable: Justo Laíz. Proyectos CSIC I+D, Universidad de la República
Presentaciones en eventos científicos internacionales. Por una lista completa, ver CvUy
Tosar, J.P: Extracellular stable nonvesicular RNAs. In: 1st Annual Meeting of the exRNA-PATH Consortium (Turin, Italy). June, 2022 Invited oral presentation
Tosar, J.P: Metabolism of extracellular ribosomes and tRNAs & identification of stable extracellular fragments. In: Seminars of the Department of Biochemistry and Molecular Biology of the University of Hamburg. June, 2022. Virtual seminar, invited oral presentation.
Tosar, J.P: Processing and signaling potential of exRNAs transported inside and outside extracellular vesicles. In: Seminars of the Max Planck Institute for Infection Biology. Berlin (Germany). June, 2022. Invited oral presentation.
Costa, B., Castellano, M., Blanco, V., Li Calzi, M., Cuevasanta, E., Ivanov, P., Witwer, K., Cayota, A., Tosar, J.P.: identification of stable naked RNAs in biofluids. In: RNA 2022, 27th Annual Meeting of the RNA Society. Boulder (USA). June, 2022. Poster presentation.
Tosar, J.P.: Extracellular vesicles and extracellular RNA: from intercellular communication to biomarker discovery. In: Congress of the Argentinian Society for Nanomedicine (NANOMED-AR). Keynote, invited (virtual).
Tosar, J.P, et. al.: Fragmentation of extracellular ribosomes and tRNAs shapes the extracellular RNAome. In: ISEV 2020 Annual Meeting (abstract selected for oral presentation).
Tosar, J.P: Fragmentation of extracellular ribosomes and tRNAs shapes the extracellular RNAome. In: LV annual meeting of the Sociedad Argentina de Investigación en Bioquímica (SAIB), joint PABMB meeting. Salta (Argentina), November, 2020. Invited oral presentation.
Tosar, J.P: Glycine tRNA Halves Are Intrinsically Stable Entities Which Can Be Secreted Non-Selectively in EVs and Incorporated in Recipient Cells in a Homotypic Human Cell Model. In: Gordon Research Conference in Extracellular Vesicles. Newry, Maine (USA). August, 2018. Oral presentation, selected.
Tosar, J.P.: Estabilidad, liberación y reconocimiento de RNAs extracelulares no asociados a vesículas. In: Workshop Biología Celular y Molecular del ARN. Instituto Leloir. Buenos Aires (Argentina). April, 2018. Invited oral presentation.
Tosar, J.P, Gámbaro, F.; Segovia, M.; Hill, M.; Westhof, E.; Cayota, A.: Extracellular-enriched tRNA halves assemble into nuclease-resistant dimers and high molecular weight aggregates with potent immunostimulatory activity. In: Gordon Research Conference in Nucleic Acids. Maine (USA). June, 2017. Oral presentation in the associated Gordon Research Seminar (GRS). Poster presentation in the GRC.
Tosar, J.P, Gámbaro, F.; Segovia, M.; Hill, M.; Westhof, E.; Cayota, A.: Extracellular-enriched tRNA halves assemble into nuclease-resistant dimers and high molecular weight aggregates with potent immunostimulatory activity. In: 22nd Annual Meeting of the RNA Society. Prague (Czech Republic) May, 2017. Poster presentation.
Tosar, J.P, Cayota, A.: Comparing intra- and extracellular small RNA profiles to estímate secretion mechanisms (selective vs. non-selective) of different small RNA families into extracellular vesicles. In: EV-associated RNA, what is the purpose? Workshop of the International Society for Extracellular Vesicles. Utrecht (The Netherlands). September, 2015. Oral presentation.
Tosar, J.P.; Sanguinetti, J.; Gambaro, F.; Bonilla, B.; Cayota, A. The small RNA content secreted by benign (MCF-10A) and malignant (MCF-7) mammary epithelial cell lines in different extracellular fractions. In: RNA 2014. 19th annual meeting of the RNA Society. Québec (Canada). June, 2014. Poster presentation.
Tosar, J.P.; Holmes, J.; Collyer, S.; Davis, F.; Laíz, J.; Higson, H. Template and catalytic effects of DNA in the construction of polypyrrole/DNA composite macro and microelectrodes. In: Biosensors 2012. 22th Anniversary World Congress on Biosensors, 2012 Cancún (México). May, 2012. Poster presentation.
Tosar, J.P.; García-Silva M.R.; Serra, E.; Pantano, S.; Bonilla, B.; Robello, C.; Cayota, A. TcPIWI-tryp: a PAZ/PIWI domain-containing protein (Argonaute) from the RNAi negative parasitic protozoan Trypanosoma cruzi. In: 3rd Latin American Protein Society Meeting. Salta (Argentina). October, 2010. Poster presentation.
Tosar, J.P.; García-Silva, M.R.; Serra, E.; Pantano, S.; Bonilla B.; Robello, C.; Cayota, A.; New insights into Argonaute evolution: a different evolutionary origin for trypanosomatid Argonautes? 150 years of Darwin’s evolutionary theory: a South American celebration. Punta del Este (Uruguay) September, 2009. Poster presentation.
Lic. Pablo Fagúndez (PEDECIBA - Química). Orientador: Dr. Eduardo Méndez. Co-orientador: Dr. Juan Pablo Tosar. Defensa intermedia: 2019.
Mag. Mauricio Castellano (PEDECIBA - Biología). Orientador: Dr. Juan Pablo Tosar. Co-orientadora: Dra. Mercedes Segovia. Inicio: 2020.
Mag. Marco Li Calzi (PEDECIBA - Biología). Orientador: Dr. Juan PAblo Tosar. Co-orientador: Dr. Alfonso Cayota. Inicio: 2021.
Lic Valentina Blanco: en preparación (comienzo en marzo de 2023)
Mag. Natalia Rego (PEDECIBA - Biología). Orientador: Dr. Carlos Robello. Co-orientador: Dr. Juan Pablo Tosar (desde 2022). Inicio: 2019.
Lic. Bruno Costa (PEDECIBA-Biología). Orientador: Dr. Juan Pablo Tosar. Co-orientador: Dr: Alfonso Cayota.
Mag. Marco Li Calzi, (PEDECIBA - Biología). Orientador: Dr. Juan Pablo Tosar. Co-orientador: Dr: Alfonso Cayota.
Mag. Fabiana Gámbaro, Orientador: Dr. Alfonso Cayota. Co-orientador: Dr. Juan Pablo Tosar.
Bruno Costa (Lic. en Cs. Biológicas), 2020.
Fabiana Gámbaro (Lic. en Bioquímica), 2017.
Ximena Doldán (Lic. en Bioquímica), 2016.
Abril - Julio, 2019:
Dr. Pavel Ivanov's, Brigham and Women’s Hospital. Harvard University School of Medicine, USA.
Mayo, 2017:
Dr. Eric Westhof. University of Strasbourg, France.
Junio, 2014:
Dr. Kenneth Witwer. The Johns Hopkins University School of Medicine. Baltimore, USA.
Octubre, 2012:
Dr. Rodolfo Rasia. IBR, Rosario, Argentina
Junio, 2011:
Dr. Frank Davis. Cranfield University, UK.
RNA Society: socio. Responsable de RNA Salon financiados: 2018/2019, 2019/2020, 2020-2021.
International Society for Extracellular Vesicles (ISEV): socio.
Club del ARN del Uruguay (CAU): socio fundador. Integrante de comisión organizadora.
Sociedad Uruguaya de Bioquímica y Biología Molecular (SBBM): socio.
Sociedad Uruguaya de Biociencias (SUB): socio.
He revisado artículos para las siguientes revistas:
Journal of Extracellular Vesicles, Biochemical Journal, Carcinogenesis, Cancer Medicine, J. Molecular Medicine, Theranostics, Biochemical Genetics, ACS Biomaterials Science & Engineer, Nucleic Acids Research, RNA, Gene Therapy, Experimental Gene Therapy, Analytical Chemistry, Analytical Biochemistry, Scientific Reports, Communications Biology, ACS Applied Materials & Interfaces, Current Analytical Chemistry, Peer J, Current Microbiology, Plos Neglected Tropical Diseases, RNA Biology, Frontiers in Molecular Biosciences, F1000 Research, Biosensors and Bioelectronics, J. Experimental Botany, Pharmaceuticals. VER TODOS
He evaluado proyectos de investigación, proyectos de reinserción y propuestas de cursos internacionales para: Welcome Trust India Alliance (India), Foncyt (Argentina), UN-Biolac (United Nations University). ANII (Uruguay), CSIC (Uruguay) y MEC (Uruguay),
Docente y responsable del curso de Química Analítica (grado, Facultad de Ciencias)
Docente y co-responsable del curso de Biofármacos (grado y posgrado, Facultad de Ciencias)
Docente del curso de Seguridad y Prevención de Riesgo (grado, Facultad de Ciencias)
Co-organizador y docente del curso: Deciphering regulatory RNA functions by high-throughout sequencing. 4-8 de diciembre, 2017 (posgrado, Institut Pasteur de Montevideo)
Dictado de clases teóricas sobre "ARNs pequeños" en ediciones anteriores del curso "Estructura y Evolución del Genoma" (grado y posgrado, Facultad de Ciencias).
Actividades de divulgación científicas varias: ver sección "notas de prensa". Organizador de actividad de divulgación con liceales por el 1er Día Internacional del ARN. Propulsor de dicha fecha. Participación en actividades de divulgación en Facultad de Ciencias e IPMon.
Miembro de la Subcomisión de Ingreso y Seguimiento (SIS) del PEDECIBA - Biología, desde 2019.
Miembro de la Comisión Directiva del Centro de Investigaciones Nucleareas de la Facultad de Ciencias desde 2014.