Abstract:
:In the absence of suitable rodent animal models for Plasmodium falciparum malaria, the efficacy testing of asexual blood-stage vaccine candidates in Aotus nancymaae represents a tool to select between different formulations before conducting expensive human clinical trials. CpG oligonucleotides (ODN) specifically promote the production of pro-inflammatory and Th1-type cytokines and they enhance the immunogenicity of co-administered antigens. Toll like receptor 9 (TLR-9) binds directly and sequence-specifically to single-stranded un-methylated CpG-DNA mediating the biological effects of CpG ODN. We cloned and functionally characterised the TLR-9 cDNA of A. nancymaae. The cDNA encompassed 3,099 bp predicted to code for 1,032 amino acid residues. Results of homology searches to human TLR-9 suggested that the receptor is 93 and 94% identical at the nucleotide and amino acid sequence levels, respectively. Stimulation of splenocytes of A. nancymaae with CpG ODN resulted in proliferative responses in all animals analysed. FACS analysis of cultures incubated with CpG ODN 2006 indicated that the B cell marker CD20 was up-regulated consistent with B cell activation. The high level of sequence conservation of Aona-TLR-9 reinforces the suitability of A. nancymaae as animal model for malaria subunit vaccine development.
journal_name
Immunogeneticsjournal_title
Immunogeneticsauthors
Spirig R,Peduzzi E,Patarroyo ME,Pluschke G,Daubenberger CAdoi
10.1007/s00251-005-0789-zsubject
Has Abstractpub_date
2005-05-01 00:00:00pages
283-8issue
3-4eissn
0093-7711issn
1432-1211journal_volume
57pub_type
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