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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

21 Jan

Nucleic Acids Chemistry, new book release by Ramon Eritja

Ramón Eritja, Scientific Director of NANBIOSIS Unit 29 Oligonucleotide Synthesis Platform (OSP) has just published a new book “Nucleic Acids Chemistry, modifications and conjugates for Biomedicine and Nanotechnology“, Anna Avinó, Scientific Coordinator of NANBIOSIS Unit 29 is also a writer of the book. The book “Nucleic Acids Chemistry” takes the most important aspects of the methodology of oligonucleotides synthesis, that is currently expanding by the endorsement of a dozen of new medicines, such as the first medicine based on interfering RNA for the control of LDL and cholesterol in blood that will facilitate the decrease of cardiovascular illnesses. The writing[...]

28 Dec

Non-viral mediated gene therapy in human cystic fibrosis airway epithelial cells recovers chloride channel functionality

Researchers of CIBER-BBN Units of NANBIOSIS: U29 Oligonucleotide Synthesis Platform (OSP) at IQAC_CSIC, led by Prof. Ramón Eritja and U10 Drug Formulation, at UPV-EHU, led by Prof José Luis Pedraz, are coauthors of an article published by International Journal of Pharmaceutics. Gene therapy strategies based on non-viral vectors are currently considered as a promising therapeutic option for the treatment of cystic fibrosis (CF), being liposomes the most commonly used gene carriers. Niosomes offer a powerful alternative to liposomes due to their higher stability and lower cytotoxicity, provided by their non-ionic surfactant and helper components. In this work, a three-formulation screening is[...]

16 Dec

Three Nanbiosis units work in the development of new sensors for the better detection of the fungus P. jirovecii, responsible for Pneumocystis pneumonia

Researchers from the CIBER-BBN have succeeded in developing detection systems for Pneumocystis jirovecii, an atypical fungus responsible for very serious pneumonia in immunosuppressed patients. These results, published in the journal Nanomaterials, are the result of collaboration between the CIBER-BBN groups led by Laura Lechuga, Ramon Eritja and Ramón Martínez Máñez, and the CIBERESP group led by Enrique J. Calderón. The researchers acknowledge the paricipation of three NANBIOSIS units of CIBER-BBN: Nanbiosis U29 Oligonucleotide Synthesis Platform (OSP), led by Ramon Eritja and Anna Avinó at IQAC-CSIC and Nanbiosis U4 Biodeposition and Biodetection Unit , led by Laura Lechuga at ICN2-CSIC, andNanbiosis[...]

22 Nov

Closer to understand the regulation of SMARCA4 expression

Researchers of NANBIOSIS U29 Oligonucleotide Synthesis Platform (OSP) from CIBERBBN at @IQAC_CSIC, led by Prof. Ramón Eritja, are the authors of an article published by Int J Biol Macromol. 2020, entitled “Influence of pH and a porphyrin ligand on the stability of a G-quadruplex structure within a duplex segment near the promoter region of theSMARCA4 gene”. Prof Eritja hightlighs the contribution to this work by Dr. Raimundo Gargallo from the University of Barcelona. The manuscript described the structural analysis of the promoter region of the SMARCA4 gene involved in ovarian cancer. This promoter region has an exceptionally long G-rich sequence.[...]

05 Nov

How to take advantage of the body’s natural processes to create innovative therapies?

During the month of October took place the Spanish Society of atherosclerosis (SEA 2020) Virtual meetings, promoted by Novartis. Prof. Ramon Eritja, Scientific Director of NANBIOSIS U29 Oligonucleotide Synthesis Platform (OSP) (from CIBERBBN at IQAC_CSIC), was the guess speaker in the session “Innovation and future therapeutic strategies in dyslipidemia” giving the conference entitled “How to take advantage of the body’s natural processes to create innovative therapies“, in the telematic congress of the Spanish society of atherosclerosis (SEA 2020) in the session “Innovation and future therapeutic strategies in dyslipidemia”.Dr. Ramon Eritja, explained the mechanism of action of some new drugs based[...]

08 Jun

NANBIOSIS researchers featured in the 15th Edition of Spanish Researchers Ranking

The 15th edition of the Webometrics Ranking of World Universities has been published, ranking researchers in Spain as well as Spaniards doing research abroad. A total of 11 Directors of NANBIOSIS units appear on the most recent list, featured on the top 2000. The list is ordered by the h-index, a metric that calculates research impact based on a correlation of papers published and number of citations, and then by number of citations. The result is a list of whose’s publications have had more impact online. NANBIOSIS researchers featured are Fernando Albericio (#207), scientific director of U3 Synthesis of Peptides[...]

09 Apr

NANBIOSIS U2, U3 & U29 participate in the POC4CoV project to develop diagnostic technologies for SARS-COV-2

The Spanish Higher Council for Scientific Research (CSIC) will finance the project Point-of-care tests for the rapid detection of SARS-CoV-2 (POC4CoV), whose objective is to have effective diagnostic technologies for Covid-19. The Institute of Microelectronics of Barcelona (IMB-CNM-CSIC), the Institute of Advanced Chemistry of Catalonia (IQAC-CSIC) and the Institute of Materials Science of Aragon (ICMA) participate in it. The POC4CoV project aims to develop Point-of-Care (POC) devices for the in vitro diagnosis of SARS-COV-2 infection quickly and reliably, thanks to the use of multiplexed systems and the use of particular biomolecular probes. To do this, POC technological platforms will b[...]

07 Feb

Ethylcellulose nanoparticles as new “in vitro” tool for cell transfection

Researchers of NANBIOSIS U12 Nanostructured liquid characterization unit and U29 Oligonucleotide Synthesis Platform (OSP) of CIBER-BBN at IQAC-CSIC have obtained successfully ethylcellulose nanoparticles with positive zeta potential formed from nano-emulsion complexation with an antisense oligonucleotide which result very promising complexes for “in vitro” cell transfection. A new non-viral gene delivery vector has been developed, based on ethylcellulose, an easily available and low cost carbohydrate polymer, “generally recognized as safe” by the FDA. Although ethylcellulose is nonionic, positively charged nanoparticle dispersions have been obtained using nano-emulsion templates in cationic:non-ionic surfactant-based systems. The nanoparticles have been successfully complexed with negatively charged phosphorothioate antisens[...]