One of the clinical feature of cystic fibrosis (CF) is a deep inflammatory process, which is characterized by production and release of cytokines and chemokines, among which interleukin 8 (IL-8) represents one of the most important. Accordingly, there is a growing interest in developing therapies against CF to reduce the excessive inflammatory response in the airways of CF patients. Since transcription factor NFkappaB plays a critical role in IL-8 expression, the transcription factor decoy (TFD) strategy might be of interest. In order to demonstrate that TFD against NFkappaB interferes with the NFkappaB pathway we proved, by chromatin immunoprecipitation (ChIP) that treatment with TFD oligodeoxyribonucleotides of cystic fibrosis IB3-1 cells infected with Pseudomonas aeruginosa leads to a decrease occupancy of the Il-8 gene promoter by NFkappaB factors. In order to develop more stable therapeutic molecules, peptide nucleic acids (PNAs) based agents were considered. In this respect PNA-DNA-PNA (PDP) chimeras are molecules of great interest from several points of view: (1) they can be complexed with liposomes and microspheres; (2) they are resistant to DNases, serum and cytoplasmic extracts; (3) they are potent decoy molecules. By using electrophoretic mobility shift assay and RT-PCR analysis we have demonstrated that (1) the effects of PDP/PDP NFkappaB decoy chimera on accumulation of pro-inflammatory mRNAs in P. aeruginosa infected IB3-1 cells reproduce that of decoy oligonucleotides; in particular (2) the PDP/PDP chimera is a strong inhibitor of IL-8 gene expression; (3) the effect of PDP/PDP chimeras, unlike those of ODN-based decoys, are observed even in the absence of protection with lipofectamine. These informations are of great impact, in our opinion, for the development of stable molecules to be used in non-viral gene therapy of cystic fibrosis.

Effects of decoy molecules targeting NFkappaBtranscription factors in cystic fibrosis IB3-1 cellsRecruitment of NFkappaB to the IL-8 gene promoterand transcription of the IL-8 gene / A., Finotti; M., Borgatti; V., Bezzerri; E., Nicolis; I., Lampronti; M. C., Dechecchi; I., Mancini; G., Cabrini; M., Saviano; Avitabile, Concetta; Romanelli, Alessandra; R., Gambari. - In: ARTIFICIAL DNA, PNA & XNA. - ISSN 1949-095X. - 3:2(2012), pp. 97-104. [10.4161/adna.21061]

Effects of decoy molecules targeting NFkappaBtranscription factors in cystic fibrosis IB3-1 cellsRecruitment of NFkappaB to the IL-8 gene promoterand transcription of the IL-8 gene

AVITABILE, CONCETTA;ROMANELLI, ALESSANDRA;
2012

Abstract

One of the clinical feature of cystic fibrosis (CF) is a deep inflammatory process, which is characterized by production and release of cytokines and chemokines, among which interleukin 8 (IL-8) represents one of the most important. Accordingly, there is a growing interest in developing therapies against CF to reduce the excessive inflammatory response in the airways of CF patients. Since transcription factor NFkappaB plays a critical role in IL-8 expression, the transcription factor decoy (TFD) strategy might be of interest. In order to demonstrate that TFD against NFkappaB interferes with the NFkappaB pathway we proved, by chromatin immunoprecipitation (ChIP) that treatment with TFD oligodeoxyribonucleotides of cystic fibrosis IB3-1 cells infected with Pseudomonas aeruginosa leads to a decrease occupancy of the Il-8 gene promoter by NFkappaB factors. In order to develop more stable therapeutic molecules, peptide nucleic acids (PNAs) based agents were considered. In this respect PNA-DNA-PNA (PDP) chimeras are molecules of great interest from several points of view: (1) they can be complexed with liposomes and microspheres; (2) they are resistant to DNases, serum and cytoplasmic extracts; (3) they are potent decoy molecules. By using electrophoretic mobility shift assay and RT-PCR analysis we have demonstrated that (1) the effects of PDP/PDP NFkappaB decoy chimera on accumulation of pro-inflammatory mRNAs in P. aeruginosa infected IB3-1 cells reproduce that of decoy oligonucleotides; in particular (2) the PDP/PDP chimera is a strong inhibitor of IL-8 gene expression; (3) the effect of PDP/PDP chimeras, unlike those of ODN-based decoys, are observed even in the absence of protection with lipofectamine. These informations are of great impact, in our opinion, for the development of stable molecules to be used in non-viral gene therapy of cystic fibrosis.
2012
Effects of decoy molecules targeting NFkappaBtranscription factors in cystic fibrosis IB3-1 cellsRecruitment of NFkappaB to the IL-8 gene promoterand transcription of the IL-8 gene / A., Finotti; M., Borgatti; V., Bezzerri; E., Nicolis; I., Lampronti; M. C., Dechecchi; I., Mancini; G., Cabrini; M., Saviano; Avitabile, Concetta; Romanelli, Alessandra; R., Gambari. - In: ARTIFICIAL DNA, PNA & XNA. - ISSN 1949-095X. - 3:2(2012), pp. 97-104. [10.4161/adna.21061]
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/491412
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 22
  • ???jsp.display-item.citation.isi??? ND
social impact