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U29. Oligonucleotide Synthesis Platform (OSP)

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U29. Oligonucleotide Synthesis Platform (OSP)

  • Scientific Director: Prof. Ramon Eritja: recgma@cid.csic.es
  • Scientific Coordinator: Dr. Anna Aviñó: aaagma@cid.csic.es
  • Entities: Institute of Avanced Chemistry of Catalonia (IQAC), Spanish National Research Council (CSIC)
  • Address: Jordi Girona, 18-26, 088034, Barcelona, Spain
  • Phone: +34 934 006 145
  • Web: IQAC- CSIC
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This unit is coordinated by the Nucleic Acids Chemistry Group at the Institute for Advanced Chemistry of Catalonia (IQAC), Spanish National Research Council (CSIC) and has the equipment needed for the production of oligonucleotides at low scale (mg to mg), purification, characterization and post-synthesis modification. The service counts with laboratories for synthesis and modification of oligonucleotides including DNA/RNA synthesizer, analytical and semi-preparative HPLC equipment for the purification and characterization of oligonucleotides. The service will focus in providing expert opinion to researchers as well as the production of tailored oligonucleotides. Routine synthesis of oligonucleotides used as primers will not be produced as there is a large number of commercial sources that provide a quick and low price service. The oligonucleotide synthesis platform will focus in providing modified oligonucleotides (ONs) that are difficult to obtain from commercial sources. These include microgram to milligram amounts of DNA and RNA derivatives carrying several modifications as well as oligonucleotide conjugates carrying lipids, membrane-receptors ligands, carbohydrates and peptides designed for therapeutic or diagnostic purposes. The facility benefits from the wide experience of Prof. Ramon Eritja that has more than 30 years expertise in the development of modified oligonucleotides.

Active projects

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Other projects

RefTitleFundin OrganismRole
SBPLY/17/180501/000376Development and validation of new intelligent administration systems of RNAs in the injured spinal cord: application in a neuroprotective therapy based on miR-138Junta de Castilla-La Mancha Participant
BIO2017-92113-EXP New tailored microRNA-based antifungal agents for crop protectionMINECO - Explora-Participant
CA17103CA17103 Delivery of antisense RNA therapeutics (DARTER) C.C.E.E. COST Action Participant
AC18/00046Monitoring of Acquired Brain Injury and recovery of biomarkers by the combined label-free NanoSensing of multiple circulating molecules (ABISens).Euronanomed-III (ERA-Net cofund action on Nanomedicine)Participant
CSIC-COV19-041Point-of-care tests for the rapid detection of SARS-CoV-2 (POC4CoV) Consejo Superior de Investigaciones Científicas (CSIC)Participant
Prometeo/2020/081Use of microRNA modulators as experimental therapies in type 1 myotonic dystrophy Generalitat Valenciana Participant



“Synthesis of oligonucleotides carrying nucleic acid derivatives of biomedical and structural interest” Eritja, R., Aviñó, A., Fàbrega, C., Alagia, A., Jorge, A.F., Grijalvo, S. In “Enzymatic and chemical synthesis of nucleic acid derivatives” (Fernández Lucas and Camarasa Eds) Willey-VCH Verlag, Weinheim (Germany), pp 237-258, (2019).

Cationic niosomes as non-viral vehicles for nucleic acids. Challenges and opportunities in gene delivery. Grijalvo, S., Puras, G., Zárate, J., Sainz-Ramos, M., AL Qtaish, N., López, T., Mashal, M., Attia, N., Díaz Díaz, D., Pons, R., Fernández, E., Pedraz, J.L., Eritja, R.  Pharmaceutics, 11(2), 50 (2019).

“Parallel clamps and polypurine hairpins (PPRH) for gene silencing and triplex-affinity capture: design, synthesis and use” Aviñó, A., Eritja, R., Cuidad, C., Noe, V. Current Protocols on Nucleic Acid Chemistry, e78 (2019).

“Efficient bioactive oligonucleotide-protein conjugation for cell-targeted cancer therapy” Aviñó, A., Unzueta, U., Cespedes, M.V., Casanova, I., Vázquez, E., Villaverde, A., Mangues, R., Eritja, R. ChemistryOpen, 8, 382-387 (2019).

“The small interfering RNAs (siRNAs) in cancer therapy: nano-based approach” Mahmoodi Chalbatani, G., Dana, H., Gharagouzloo, E., Grijalvo, S., Eritja, R., Logsdon, C.D., Memari, F., Miri, S.R., Rad, M.R., Marmari, V. Int. J. Nanomedicine, 14, 3111-3128 (2019).

“The origins and the biological consequences of the Pur/Pyr DNA•RNA asymmetry” Terrazas, M., Genna, V., Portella, G., Villegas, N., Sánchez, D., Arnan, C., Pulido-Quetglas, C., Johnson, E., Guigó, R., Brun-Heath, I., Aviñó, A., Eritja, R., Orozco, M. Chem., 5, 1619-1631 (2019).

“On the race for more stretchable and tough hydrogels” Grijalvo, S., Eritja, R., Díaz Díaz, D. Gels, 5, 24 (2019).

“Gene delivery to the rat retina by non-viral vectors based on chloroquine-containing cationic niosomes” Mashal, M., Attia, N., Martínez-Navarrete, G., Soto-Sánchez, C., Fernández, E., Grijalvo, S., Eritja, R., Puras, G., Pedraz, J.L. J. Control. Rel., 304, 181-190 (2019).

“Study of conformational transitions of i-motif DNA using time-resolved fluorescence and multivariate analysis methods” Benabou, S., Ruckebusch, C., Sliwa, M., Aviñó, A., Eritja, R., Gargallo, R., de Juan, A.  Nucleic Acids Res., 47, 6590-6605 (2019).

“Expanding the limits of amide-triazole isosteric substitution in bisamide-based physical gels” Tautz, M., Torras, J., Grijalvo, S., Eritja, R., Saldías, C., Alemán, C., Díaz Díaz D. RSC Adv., 9, 20841-20851 (2019).

“Aptamer-peptide conjugates as a new strategy to modulate human α-thrombin binding affinity” Aviñó, A., Jorge, A.F., Huertas, C.S., Cova, T.F.G.G., Pais, A., Lechuga, L.M., Eritja, R., Fàbrega, C. Biochim. Biophys. Acta (General subjects), 1863, 1610-1630 (2019).

“Cationic niosome-based hBMP7 gene transfection of neuronal precursor NT2 cells to reduce the migration of glioma cells in vitro” Attia, N., Mashal, M., Grijalvo, S., Eritja, R., Puras, G., Pedraz, J.L. J. Drug Delivery Science Technol., 53, 101219 (2019).

“Stabilization of c-KIT G-quadruplex DNA structures by the RNA polymerase I inhibitors BMH-21 and BA-41” Mazzini, S., Gargallo, R., Musso, L., De Santis, F., Aviñó, A., Scaglioni, L., Eritja, R., Di Nicola, M., Zunino, F., Amatulli, A., Dallavalle, S. Int. J. Mol. Sci., 20, 4927 (2019).

“Alginate hydrogels as scaffolds and delivery systems to repair the damaged spinal cord” Grijalvo, S., Nieto-Díaz, M., Maza, R.M., Eritja, R., Díaz Díaz, D. Biotech J., 14, e1900275 (2019).

“A pH-dependent bolt involving cytosine bases located in the lateral loops of antiparallel G-quadruplex structures within the SMARCA4 gene promotor” Benabou S., Mazzini, S., Aviñó, A., Eritja, R. Gargallo, R. Sci. Rep., 9, 15807 (2019).


Selective depletion of metastatic stem cells as therapy for human colorectal cancer. Céspedes, M.V., Unzueta, U., Aviñó, A., Gallardo, A., Álamo, P., Sala, R., Sánchez-Sardi, A., Casanova, I., Mangues, M.A., Lopez-Pousa, A., Eritja, R., Villaverde, A., Vázquez, E., Mangues, R. EMBO Mol. Med., 10, e8772 (2018).

DNA-based nanoscaffolds as vehicles for 5-fluoro-2’-deoxyuridine oligomers in colorectal cancer therapy. Jorge, A.F., Aviñó, A., Pais, A.A.C.C., Eritja, R., Fàbrega, C. Nanoscale, 10, 7238-7249 (2018).

Exploring PAZ/3’-overhang interaction to improve siRNA specificity. A combined experimental and modeling study. Alagia, A., Jorge, A.F., Aviño, A., Cova, T.F.G.G., Crehuet, R., Grijalvo, S., Alberto Pais, A.A.C.C., Eritja, R. Chem. Sci., 9, 2074-2086 (2018).

DNA origami-driven lithography for patterning on gold surfaces with sub-10 nanometer resolution. Gállego, I., Manning, B., Prades, J.D., Mir, M., Samitier, J., Eritja, R. Adv. Mat., 29, 1603233 (2017).

Glucose-nucleobase pseudo base pairs as a new biomolecular interaction in a DNA context. Vengut-Climent, E., Gómez-Pinto, I., Lucas, R., Peñalver, P., Aviñó, A., Fonseca-Guerra, C, Bickelhaupt, F.M.., Eritja, R., González, C., Morales, J.C. Angew. Chem. Int. Ed. Engl., 55, 8643-8647 (2016).

News U29

27 Jul

1st Nanomedicine Forum of CIBER-BBN/NANBIOSIS and CSIC Nanomed Conection

During the days 30 of June and 1st of July took place in Barcelona, in the auditorium of the Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), the 1st Forum on Nanomedicine gathering scientists from the CSIC net Nanomed Conection and from the CIBER-BBN and its ICTS NANBIOSIS. This forum brought toguether researchers from the most eminent national research centers in nanomedicine, that during the two days meeting presented their works and findings and discussed the impact of nanomedicine in the fields of drug delivery, diagnosis and therapy. The workshop was open by the Director of IQAC-CSIC,  Jesús Joglar, the  Scientific Coordinator[...]

03 May


Dr. Ramon Eritja, Scientific Director of NANBIOSIS unit 29 of Oligonucleotide Synthesis Platform (OSP) and Dr. Santiago Grijalvo researcher at NANBIOSIS unit 12 of Nanostructured liquid characterization, from CIBER-BBN and IQAC-CSIC, together with Dr. Andreia F. Jorge, from Coimbra Chemistry Centre (CQC), acting as guest editors of journal Pharmaceutics, of MDPI Publisher, welcome authors to submit their articles on special issues on Recent Trends in Oligonucleotide Based Therapies. In the past few decades, significant efforts have been made towards the clinical application of oligonucleotides. However, the potential of the therapeutic applications of RNA-based strategies have recently been spotlighted after the first approval of mRNA vaccines in response to COVID-19[...]

02 May

Wide representation of NANBIOSIS research in NALS 2022 and best Oral Presentation to Eloi Parladé

During the last 27-29 April, the 3rd International Conference on Nanomaterials Applied to Life Sciences 2022 (NALS 2022) has taken place in the Excellence Campus of Universidad de Cantabria in Santander (Spain), organized by the University of Cantabria and Institute Valdecilla-IDIVAL. NALS 2022 has been a multidisciplinary conference series sharing new results and ideas in the fields of biosensors, lab on a chip, drug delivery nanopharmacy. nanobiotechnology, intelligent nanomaterials, magnetic materials, nanotoxicity, antimicrobials, novel applications of 3d bioprinting and nanoimaging. NANBIOSIS has been represented at this edition by members of several of its units, among them we must highlight the set of four ora[...]

27 Apr


Dr. Anna Aviñó, Scientific Coordianator of NANBIOSIS unit 29 of Oligonucleotide Synthesis Platform (OSP) and Dr. Carme Fàbrega from the Nucleic Acid Chemistry group from CIBER-BBN and IQAC_CSIC, together with Dr. Claudia Riccardi from the University of Naples Federico II, Dr. Stefania Mazzini from University of Milan, and Dr. Raimundo Gargallo from the University of Barcelona, acting as guest editors of the journal Frontiers in Chemistry, welcome authors to submit their articles on special issues on Nucleic Acid-Based Aptamers in Therapeutics and Diagnostics. Nucleic acid‐based aptamers are short DNA or RNA sequences able to adopt specific three‐dimensional architectures. The high affinity and selectivity shown for a selected target, as well as t[...]

21 Apr

The coming revolution: synthetic DNA and RNA for therapeutic and diagnostic applications

The discovery of the mRNA vaccines for the treatment of coronavirus, as well as new medicines for the treatment of genetic diseases, has been important in the quest of solutions for undrugable diseases in an unexpected short-time. Thus, the chemical modifications of nucleic acids with diagnostic and therapeutic purposes is now a reality, a revolution that promises to give hopes on unsolved medical problems or optimize previous approaches, largely due to the research push for the development of mRNA vaccines against SARS-CoV-2 infection. Now, the prestigious “The Chemical Record” journal has invited the Nucleic Acids Chemistry group, of IQAC-CSIC and[...]

10 Jan

DNA nanotechnologists are in mourning

At the end of the XXth century Nanotechnology appeared as one of the more powerful technologies for the future. At that time material sciences were able to produce nanomaterials with exquisite size control and atomic force, microscopy was able to visualize objects in the nanoscale and photolithography arrived to their physical limits in the preparation of computer chips threatening Moore’s law. This empirical law saying that as transistor components shrank, the number per chip doubled about every 18 months, was acting from 1971  (Intel’s first chip) to billions in the present times.  At these times, one crucial development was t[...]

24 Dec

Two great scientists and excellent people pioneers on Nucleic Acids Chemistry

Nucleic Acid Chemistry is an interdisciplinary discipline that combines organic chemistry, biochemistry, pharmacology, materials chemistry and biophysics. It started soon after the Watson–Crick model of DNA with the synthesis of the first dinucleotide, published in 1955. However, in the last decade, this field has blossomed, with the demonstration that Nucleic Acid Chemistry can provide innovative solutions to health problems such as vaccination, pathogen detection, and the treatment of metabolic or genetic diseases as well as providing important tools for the interrogation of cellular mechanisms. Profesor Ramon Eritja, Scientific director of the Oligonucleotides Synthesis Platform U29 from ICTS NANBIOSIS will chair[...]

21 Jun

A project by NANBIOSIS researchers, focused on COVID-19 detection and therapy, selected in ‘La Marató’ research program

The Scientific Commission of ‘La Marató TV3’ has seleced the project entitled “Diagnosis and treatment of Sars-Cov-2 by triplex formation”, led by Ramon Eritja, Scientific Director of NANBIOSIS Unit 29 Oligonucleotide Synthesis Platform (OSP) from CIBER-BBN and IQAC_CSIC to be financed with € 398,750.00. Verónica Noé from the Fundació Bosch i Gimpera Universitat de Barcelona, ​​the CIBERESP researcher Enrique Calderón Sandubete, from the Virgen del Rocío University Hospital and María Valeria Grazú Bonavía, from the Institute of Nanoscience and Materials of Aragón, INMA (CSIC- UNIZE) also participate in this project. The edition of this solidarity initiative promoted by the Corporació[...]