Atelocollagen-mediated in vivo siRNA transfection in ovarian carcinoma is influenced by tumor site, siRNA target and administration route

Abstract : Ovarian cancer is the leading cause of death from gynecological malignancies worldwide, and innate or acquired chemoresistance of ovarian cancer cells is the major cause of therapeutic failure. It has been demonstrated that the concomitant inhibition of Bcl-x L and Mcl-1 anti-apoptotic activities is able to trigger apoptosis in chemoresistant ovarian cancer cells. In this context, siRNA-mediated Bcl-x L and Mcl-1 inhibition constitutes an appealing strategy by which to eliminate chemoresistant cancer cells. However, the safest and most efficient way to vectorize siRNAs in vivo is still under debate. In the present study, using in vivo bioluminescence imaging, we evaluated the interest of atelocollagen to vectorize siRNAs by intraperitoneal (i.p.) or intravenous (i.v.) administration in 2 xenografted ovarian cancer models (peritoneal carcinomatosis and subcutaneous tumors in nude mice). Whereas i.p. administration of atelocollagen-vectorized siRNA in the peritoneal carcinomatosis model did not induce any gene downregulation, a 70% transient downregulation of luciferase expression was achieved after i.v. injection of atelocollagen-vectorized siRNA in the subcutaneous (s.c.) model. However, the use of siRNA targeting Bcl-x L or Mcl-1 did not induce target-specific downregulation in vivo in nude mice. Our results therefore show that atelocollagen complex formulation, the administration route, tumor site and the identity of the siRNA target influence the efficiency of atelocollagen-mediated siRNA delivery.
Document type :
Journal articles
Complete list of metadatas

Cited literature [52 references]  Display  Hide  Download

https://www.hal.inserm.fr/inserm-01856064
Contributor : Nathalie Duchange <>
Submitted on : Thursday, August 9, 2018 - 3:04:14 PM
Last modification on : Thursday, July 25, 2019 - 2:24:04 PM
Long-term archiving on : Saturday, November 10, 2018 - 1:25:04 PM

File

or_38_4_1949_PDF.pdf
Publication funded by an institution

Identifiers

Collections

Citation

Matthieu Meryet-Figuière, Charlotte Lecerf, Emilie Varin, Jean-Luc Coll, Marie-Hélène Louis, et al.. Atelocollagen-mediated in vivo siRNA transfection in ovarian carcinoma is influenced by tumor site, siRNA target and administration route. Oncology Reports, Spandidos Publications, 2017, 38 (4), pp.1949 - 1958. ⟨10.3892/or.2017.5882⟩. ⟨inserm-01856064⟩

Share

Metrics

Record views

540

Files downloads

135