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11 Results Found

  • Article
  • Open Access
10 Citations
6,258 Views
20 Pages

Detection of SARS-CoV-2 Virus by Triplex Enhanced Nucleic Acid Detection Assay (TENADA)

  • Anna Aviñó,
  • Carlos Cuestas-Ayllón,
  • Manuel Gutiérrez-Capitán,
  • Lluisa Vilaplana,
  • Valeria Grazu,
  • Véronique Noé,
  • Eva Balada,
  • Antonio Baldi,
  • Alex J. Félix and
  • Carlos J. Ciudad
  • + 8 authors

3 December 2022

SARS-CoV-2, a positive-strand RNA virus has caused devastating effects. The standard method for COVID diagnosis is based on polymerase chain reaction (PCR). The method needs expensive reagents and equipment and well-trained personnel and takes a few...

  • Article
  • Open Access
5 Citations
2,843 Views
13 Pages

Therapeutic strategies for rare diseases based on exon skipping are aimed at mediating the elimination of mutated exons and restoring the reading frame of the affected protein. We explored the capability of polypurine reverse-Hoogsteen hairpins (PPRH...

  • Article
  • Open Access
5 Citations
3,406 Views
17 Pages

PolyPurine Reverse Hoogsteen Hairpins Work as RNA Species for Gene Silencing

  • Eva Aubets,
  • Miguel Chillon,
  • Carlos J. Ciudad and
  • Véronique Noé

16 September 2021

PolyPurine Reverse Hoogsteen Hairpins (PPRHs) are gene-silencing DNA-oligonucleotides developed in our laboratory that are formed by two antiparallel polypurine mirror repeat domains bound intramolecularly by Hoogsteen bonds. The aim of this work was...

  • Article
  • Open Access
5 Citations
3,019 Views
17 Pages

In Vitro and In Vivo Effects of the Combination of Polypurine Reverse Hoogsteen Hairpins against HER-2 and Trastuzumab in Breast Cancer Cells

  • Ester López-Aguilar,
  • Patricia Fernández-Nogueira,
  • Gemma Fuster,
  • Neus Carbó,
  • Carlos J. Ciudad and
  • Véronique Noé

Therapeutic oligonucleotides are powerful tools for the inhibition of potential targets involved in cancer. We describe the effect of two Polypurine Reverse Hoogsteen (PPRH) hairpins directed against the ERBB2 gene, which is overexpressed in positive...

  • Article
  • Open Access
9 Citations
4,275 Views
22 Pages

Detection of a G-Quadruplex as a Regulatory Element in Thymidylate synthase for Gene Silencing Using Polypurine Reverse Hoogsteen Hairpins

  • Eva Aubets,
  • Alex J. Félix,
  • Miguel Garavís,
  • Laura Reyes,
  • Anna Aviñó,
  • Ramón Eritja,
  • Carlos J. Ciudad and
  • Véronique Noé

Thymidylate synthase (TYMS) enzyme is an anti-cancer target given its role in DNA biosynthesis. TYMS inhibitors (e.g., 5-Fluorouracil) can lead to drug resistance through an autoregulatory mechanism of TYMS that causes its overexpression. Since G-qua...

  • Article
  • Open Access
2 Citations
1,879 Views
17 Pages

Combinatorial Anti-Cancer Effect of Polypurine Reverse Hoogsteen Hairpins against KRAS and MYC Targeting in Prostate and Pancreatic Cancer Cell Lines

  • Simonas Valiuska,
  • Kayla K. Elder,
  • Steven J. McKay,
  • Carlos J. Ciudad,
  • Véronique Noé and
  • Tracy A. Brooks

16 October 2024

Introduction: KRAS and MYC are proto-oncogenes that are strictly regulated in healthy cells that have key roles in several processes such as cell growth, proliferation, differentiation, or apoptosis. These genes are tightly interconnected, and their...

  • Feature Paper
  • Article
  • Open Access
17 Citations
5,327 Views
17 Pages

Fast and Accurate Pneumocystis Pneumonia Diagnosis in Human Samples Using a Label-Free Plasmonic Biosensor

  • Olalla Calvo-Lozano,
  • Anna Aviñó,
  • Vicente Friaza,
  • Alfonso Medina-Escuela,
  • César S. Huertas,
  • Enrique J. Calderón,
  • Ramón Eritja and
  • Laura M. Lechuga

26 June 2020

Pneumocystis jirovecii is a fungus responsible for human Pneumocystis pneumonia, one of the most severe infections encountered in immunodepressed individuals. The diagnosis of Pneumocystis pneumonia continues to be challenging due to the absence of s...

  • Article
  • Open Access

Ovarian Cancer Susceptibility and Chemosensitivity to KRAS Modulation

  • Alexandra Maria Psaras,
  • Steven J. McKay,
  • Janelle Vasquez Vilela,
  • Eddison Ospina Sanchez,
  • Marina G. Cintrón,
  • Kayla K. Elder and
  • Tracy A. Brooks

5 February 2026

KRAS is frequently amplified or overexpressed in ovarian cancer and represents a potential therapeutic target for overcoming chemoresistance. We employed complementary approaches—CRISPR/Cas9 gene editing, Tet-ON inducible knockdown, polypurine...

  • Article
  • Open Access
9 Citations
3,209 Views
18 Pages

Targeting MYC Regulation with Polypurine Reverse Hoogsteen Oligonucleotides

  • Simonas Valiuska,
  • Alexandra Maria Psaras,
  • Véronique Noé,
  • Tracy A. Brooks and
  • Carlos J. Ciudad

26 December 2022

The oncogene MYC has key roles in transcription, proliferation, deregulating cellular energetics, and more. Modulating the expression or function of the MYC protein is a viable therapeutic goal in an array of cancer types, and potential inhibitors of...

  • Article
  • Open Access
2,706 Views
21 Pages

Synthesis and Validation of TRIFAPYs as a Family of Transfection Agents for Therapeutic Oligonucleotides

  • Berta Isanta,
  • Ana Delgado,
  • Carlos J. Ciudad,
  • Mª Antònia Busquets,
  • Rosa Griera,
  • Núria Llor and
  • Véronique Noé

25 March 2024

Transfection agents play a crucial role in facilitating the uptake of nucleic acids into eukaryotic cells offering potential therapeutic solutions for genetic disorders. However, progress in this field needs the development of improved systems that g...

  • Article
  • Open Access
8 Citations
5,081 Views
18 Pages

Targeting KRAS Regulation with PolyPurine Reverse Hoogsteen Oligonucleotides

  • Alexandra Maria Psaras,
  • Simonas Valiuska,
  • Véronique Noé,
  • Carlos J. Ciudad and
  • Tracy A. Brooks

14 February 2022

KRAS is a GTPase involved in the proliferation signaling of several growth factors. The KRAS gene is GC-rich, containing regions with known and putative G-quadruplex (G4) forming regions. Within the middle of the G-rich proximal promoter, stabilizati...