Gene Therapy

Gabriela Silva

Gabriela Silva

Principal Investigator



Campus Sant'Ana
Pólo de Investigação, NMS, UNL
Rua Câmara Pestana, nº 6
1150-082 Lisboa, Portugal

Phone: (+351) 218 803 127
E-mail: gabriela.silva(at)

Main interests

Our main research interest is focused on the development of non-viral vectors for ocular gene therapy, in particular for retinopathies (diabetic, prematurity, Lebers’ Congenital Amaurosis and Retinitis Pigmentosa and other pathologies in which neovascularization is involved).

For this purpose, our approach is three-fold:

1) Develop non-viral vectors based on natural and synthetic polymers such as chitosan, hyaluronic acid, and PDMAEMA.

2) Optimize of the delivery and expression of genes of interest, using more efficient plasmid-based expression systems and linkage of nuclear localization signals.

3) Contribute to the definition of the etiology and identification of new therapeutic approaches for treating retinal diseases, with emphasis on RAS (Renin Angiotensin-System), PEDF and anti-angiogenic VEGF isoforms.

Research Areas


- PTDC/SAU-BEB/098475/2008 - "Development of non-viral vectors for ocular gene therapy". Principal Investigador. 150 000 Euro. Fundação para a Ciência e Tecnologia (FCT), Portugal.

- PTDC/SAU-FCF/100291/2008 - "EncapsDevice: Development of polymeric nanostructures for nasal and pulmonary delivery of peptides and proteins". Team member. 200 000 Euro. Fundação para a Ciência e Tecnologia (FCT), Portugal.

- PIRG05-GA-2009-249314 - Marie Curie Reintegration Grant. "EyeSee - Development of new gene therapy approaches for the treatment of ocular neovascularization", Principal Investigador. 100 000 Euro. EU, FP7.

- EXPL/BIM-MEC/1433/2013 - “Targeting the renin-angiotensin system for the treatment of retinal diseases“. Principal Investigador. 38 880 Euro. Fundação para a Ciência e Tecnologia (FCT), Portugal.

  • A.V. Oliveira, A. Marcelo, A.M. Rosa da Costa, G.A. Silva. “Modification and characterization of hyaluronic acid: a new polymer for retinal gene delivery”. Material Science and Engineering C. 2016.
  • A.V. Oliveira, G.A. Silva. Chitosan-based vectors mediate long-term gene expression in the retina. Journal of Bionanoscience 9(5). pp. 373-382(10). 2015. DOI: 10.1166/jbns.2015.1314
  • A. V. Oliveira, G. A. Silva*, D. C. Chung. “Prolonged, large gene expression with phiC31-integrase-chitosan mediated gene delivery”. Acta Biomaterialia. 2015. *Corresponding Author. DOI:10.1016/j.actbio.2015.01.013
  • A. V. Oliveira, G. A. Silva. “Hyaluronic acid increases transfection efficiency of chitosan gene delivery”. Journal of Nanomaterials. 2014. DOI:10.1155/2014/246347
  • S. Machado, S.M. Calado, D. M. Bitoque, A. V. Oliveira, C. L. Øpstad, M. Zeeshan, H.-R. Sliwka, V. Partali, M. D. Pungente, G.A. Silva. Cationic polyene phospholipids as DNA carriers for ocular gene therapy. BioMed Research International. 2014. Volume 2014 (2014), Article ID 703253.
  • S. M. Calado, A. V. Oliveira, S. Machado, A. P. Silva, R. Haase, G. A. Silva, Sustained gene expression in the retina by improved episomal vectors, Tissue Engineering: Part A. 2014. DOI:10.1089/ten.TEA.2013.0672
  • D. M. Bitoque, S. Simao, A. V. Oliveira, S. Machado, E. Lopes, M. R. Duran, A. M. R. Costa, G. A. Silva. Efficiency of RAFT-synthesized PDMAEMA in gene transfer to the retina. Journal of Tissue Engineering and Regenerative Medicine. 2014. DOI:10.1002/term.1909.
  • A. V. Oliveira#, A. P. Silva#, D. B. Bitoque, G. A. Silva*, A. M. R Costa, “Transfection efficiency of chitosan and thiolated chitosan in retinal pigment epithelium cells: a comparison”. Journal of Pharmacy and Bioallied Sciences 5:111-8. 2013 [# equally contributing authors.] *Corresponding Author.
  • G. A. Silva, N. F. Silva, T. M. Fortunato. Stem cell and tissue engineering therapies for ocular regeneration. Current Stem Cell Research Therapy. 2011 Sep 1;6(3):255-72.



Daniel Chung, University of Pennsylvania, Philadelphia, USA.

Ana Costa, Departamento de Química, Universidade do Algarve, Faro, Portugal.

Leonor Cancela, Departamento Ciências Biomédicas e Medicina, Universidade do Algarve, Faro, Portugal.

Michael Pungente, Weill Cornell Medical College, Doha, Qatar.

Francisco Corrales & Shomi Batthacharya, CABIMER, Seville, Spain.

Team photos