1. Peña de Ortiz, S. and Jamieson Jr., G.A. HZF-3, an immediate-early orphan receptor homologous to NURR1/NOT: Induction upon membrane depolarization and seizures. Mol. Brain. Res. 1996, 38:1-13.
2. Peña de Ortiz S., Maldonado-Vlaar, CS., Carrasquillo Y. Hippocampal Expression of the Orphan Nuclear Receptor Gene hzf-3/nurr1 During Spatial Discrimination Learning. Neurobiology of Learning and Memory, 2000, 74:161-171. Cover Picture
3. Peña de Ortiz, S and Arshavsky YI. DNA Recombination is a Possible Mechanism for Declarative Memory. Journal of Neuroscience Research, (2001) 63:72-81 .
4. Ren K and Peña de Ortiz S. Non-homologous DNA end joining in the mature rat brain. Journal of Neurochemistry, 2002, 80: 949-959
5. Kida S, Josselyn SA, Peña de Ortiz S., Kogan JH, Chévere I., Masushige S, and Silva AJ. CREB required for the stability of new and reactivated fear memories. Nature Neuroscience, 2002; 5(4):348-55
6. Robles Y, Pablo E. Vivas, Ortiz-Zuazaga HG, Yahaira Felix, Peña de Ortiz, S. Hippocampal gene expression profiling in spatial learning. Neurobiology of Learning & Memory, 2003, 80:80-95.
7. Peña de Ortiz S, Colón M, Carrasquillo Y, Padilla B, and Arshavski YI. Experience-dependent expression of the gene encoding terminal deoxynucleotidyl transferase in the mouse brain. Neuroreport, 2003, 14(8):1141-4.
8. Ge H, Chiesa R, Peña de Ortiz, S. HZF-3 Expression in the Amygdala after Establishment of Conditioned Taste Aversion. Neuroscience, 2003, 120:1-4.
9. Wang J., Ren K., Pérez J, Silva AJ, Peña de Ortiz, S. DNA ligase inhibitors interfere with memory consolidation in conditioned taste aversion. Learning & Memory, 2003; 10: 503-509
10. Santini E, Ge H, Ren K, Peña de Ortiz S, Quirk GJ. Consolidation of fear extinction involves protein synthesis and c-Fos in medial prefrontal cortex. Journal of Neuroscience, 2004, 24:5704-10.
11. Al Banchaabouchi M, Peña de Ortiz S, Menéndez R, Ren K, Maldonado-Vlaar CS. Chronic lithium Decreases Basal HZF-3 Expression in the Rat Brain and Impairs the Initial Acquisition of Spatial Discrimination. Physiology, Biochemistry & Behavior, 2004, 79:607-621.
12. Colón-Cesario WI, Martínez-Montemayor MM, Morales S, Félix J, Cruz J, Adorno M, Pereira L, Colón N, Maldonado-Vlaar CS, and Peña de Ortiz S. (2006) Knockdown of Nurr1 in the Rat Hippocampus: Implications to Spatial Discrimination Learning and Memory. Learning & Memory, 13:734-744.
13. Colón-Cesario M, Wang J, Ramos-Sepúlveda X, García HG, Dávila JJ, Laguna J, Rosado C, and Peña de Ortiz S. (2006) An Inhibitor of DNA Recombination Blocks Memory Consolidation, but not Reconsolidation, in Context Fear Conditioning. Journal of Neuroscience, 26:5524-5533.
14. Saavedra-Rodríguez L., Vázquez A., Ortiz-Zuazaga HG, Chorna NE, González FA, Andrés L., Rodríguez K, Ramírez F, Rodríguez A., and Peña de Ortiz S. (2009) Identification of flap-structure specific endonuclease 1 as a factor involved in long-term memory formation of aversive learning. Journal of Neuroscience, 29:5726-37
15. Huguet G., Aldavert-Vera L., Elisabeth E., Peña de Ortiz S., Morgado-Bernal I., Segura-Torres P. (2009) Intracranial self-stimulation to the lateral hypothalamus, a memory improving treatment, results in hippocampal changes in gene expression. Neuroscience, 162:359-74.