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2004 MAR 31 - (NewsRx.com & NewsRx.net) -- Altering the cellular localization of expressed protein and the immunization route in DNA immunization allows manipulation of the immune response.
According to published research from the United States, "DNA immunization by intramuscular (IM) injection induces Th1 responses, whereas gene gun (GG) immunization into the skin stimulates Th2 responses. Three ovalbumin (OVA) cDNA constructs, in which OVA is cytoplasmic (CYT), secreted (SECR), or transmembrane (TM), were compared in immunization studies using intramuscular injection or biolistic bombardment of the skin."
"Gene gun immunization with OVA-CYT or OVA-TM led to strong OVA-specific CTL responses, but not following OVA-SECR immunization," reported Penelope A. Morel and colleagues at the University of Pittsburgh. "In contrast, intramuscular immunization with OVA-SECR or OVA-TM led to potent CTL while immunization with OVA-CYT was ineffective. OVA-specific antibodies were detected following GG immunization with all three constructs, whereas only the OVA-SECR construct induced antibody production following intramuscular immunization. ...
Source: HighBeam Research, Altering conditions of DNA immunization allows control of immune...