Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 107, Issue 43, Pages 18575-18580Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1000400107
Keywords
protein transduction domain; immunotherapy; autoimmunity; allergy
Categories
Funding
- National Institutes of Health [AI036529, RO1-HL084225]
- National Research Foundation of Korea [NRF-2010-0000733, NRF-R11-2007-040-02004-0, 2010-0025389]
- Seoul Development Institute [11112]
- Korea Research Foundation [KRF-2006-E00010]
- Hanyang University [HY-2010-00000000219]
- Czech Ministry of Education [00211620812]
- National Research Foundation of Korea [R11-2007-040-02004-0, 2010-0025389] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Foxp3 is a key transcription factor for differentiation and function of regulatory T (Treg) cells that is critical for maintaining immunological self-tolerance. Therefore, increasing Treg function by Foxp3 transduction to regulate an inflammatory immune response is an important goal for the treatment of autoimmune and allergic diseases. Here we have generated a cell-permeable Foxp3 protein by fusion with the unique human HHph-1-PTD (protein transduction domain), examined its regulatory function in T cells, and characterized its therapeutic effect in autoimmune and allergic disease models. HHph-1-Foxp3 was rapidly and effectively transduced into cells within 30 min and conferred suppressor function to CD4(+)CD25(-)T cells as well as directly inhibiting T-cell activation and proliferation. Systemic delivery of HHph-1 Foxp3 remarkably inhibited the autoimmune symptoms of scurfy mice and the development of colitis induced by scurfy or wild-type CD4 T cells. Moreover, intranasal delivery of HHph-1-Foxp3 strongly suppressed ovalbumin-induced allergic airway inflammation. These results demonstrate the clinical potential of the cell-permeable recombinant HHph-1-Foxp3 protein in autoimmune and hypersensitive allergic diseases.
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