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  • Title: CpG DNA is an effective oral adjuvant to protein antigens in mice.
    Author: McCluskie MJ, Weeratna RD, Krieg AM, Davis HL.
    Journal: Vaccine; 2000 Nov 22; 19(7-8):950-7. PubMed ID: 11115721.
    Abstract:
    We have previously reported that synthetic oligodeoxynucleotides containing immunostimulatory CpG motifs (CpG ODN) are potent adjuvants to protein administered by intramuscular (IM) injection or intranasal (IN) inhalation to BALB/c mice. Herein, we have evaluated oral delivery of CpG ODN with purified hepatitis B surface antigen (HBsAg) or tetanus toxoid (TT) to determine its potential as an adjuvant to oral vaccines. CpG ODN augmented systemic (IgG in plasma, CTL, T-cell proliferation) and mucosal (IgA in lung, vaginal or gut washes, feces and saliva) immune responses against both antigens. CpG stimulated both T-helper type 1 (Th1) (CTL, IgG2a) and Th2 (IgG1, IgA) responses when delivered orally. Results from this study indicate that stimulatory CpG ODN may be effective as an adjuvant with oral vaccines.
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