A Novel Bioabsorbable Sheet That Delivers NF-κB Decoy Oligonucleotide Restrains Abdominal Aortic Aneurysm Development in Rats

  • Akimoto Shouta
    Department of Advanced Clinical Science and Therapeutics, School of Medicine, The University of Tokyo
  • Suzuki Jun-ichi
    Department of Advanced Clinical Science and Therapeutics, School of Medicine, The University of Tokyo
  • Aoyama Norio
    Department of Oral Interdisciplinary Medicine, Kanagawa Dental University
  • Ikeuchi Ryota
    AnGes, Inc.
  • Watanabe Hajime
    AnGes, Inc.
  • Tsujimoto Hiroyuki
    Hosokawa Micron Co.
  • Wakayama Kouji
    Department of Advanced Clinical Science and Therapeutics, School of Medicine, The University of Tokyo
  • Kumagai Hidetoshi
    Department of Advanced Clinical Science and Therapeutics, School of Medicine, The University of Tokyo
  • Ikeda Yuichi
    Department of Cardiovascular Medicine, School of Medicine, The University of Tokyo
  • Akazawa Hiroshi
    Department of Cardiovascular Medicine, School of Medicine, The University of Tokyo
  • Komuro Issei
    Department of Cardiovascular Medicine, School of Medicine, The University of Tokyo

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<p>For the suppression of inflammation in the aneurysm development, we focused on inhibition of an important transcription factor, nuclear factor-kappa B (NF-κB), using a decoy strategy. We newly developed a novel bioabsorbable sheet that delivers NF-κB decoy oligodeoxynucleotide (ODN).</p><p>We treated 5-week-old SD rats that were induced with abdominal aortic aneurysm (AAA) using 0.5 M CaCl2 with an NF-κB decoy sheet. Four weeks after AAA induction, aortic tissue was excised for further examinations. We showed that this bioabsorbable sheet could deliver the decoy ODN into the target tissues and dissolve within a week. Treatment with the NF-κB decoy sheet reduced the aneurysm size compared with the controls. It also suppressed inflammation due to the effect of NF-κB decoy ODN. Immunohistochemistry revealed that the expression of CD31, CD4, and CD11b in the NF-κB decoy sheet group was significantly lower than in the control sheet group. The NF-κB decoy sheet was absorbed on the target tissue.</p><p>We have revealed that the bioabsorbable sheet mediated decoy ODN is effective for transfection into target organs. We have also indicated that NF-κB decoy ODN transfection using this sheet has the potential to suppress the dilatation of aneurysm. The bioabsorbable sheet mediated transfection of the decoy ODN can be beneficial for the clinical treatment of AAA and other NF-κB-related cardiovascular diseases.</p>

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