Studies on peptides. CLXVII. Solid-phase syntheses and immunological properties of fragment peptides related to human malaria circumsporozoite protein.
A glycine-linked tetramer of Asn-Ala-Asn-Pro, a tandem repeated sequence of malaria circumsporozoite (CS) protein, was synthesized by the Boc-based solid phase method, followed by deprotection with 1 M trimethylsilyl trifluoromethanesulfonate-thioanisole in trifluoroacetic acid. In addition, three tetramer-related peptides were similarly synthesized, i.e., a 34-residue peptide [linked with TH, a proposed T-cell epitope of CS, at the C-terminus of the tetramer], a 46-residue peptide and a 59-residue peptide [linked with HA or HA', two proposed T-cell epitopes of influenza hemagglutinin protein, at the N-terminus of the above 34-residue peptide]. Their immunological properties were examined by enzyme-linked immunosorbent assay, for which three different congenic strains of mouse were used to raise the specific antibodies. Despite conjugation of T-cell epitopes to the tetramer, the mice of low-responder strains to the tetramer failed to produce any antibody specific to the tetramer. However, with the aid of recombinant interleukin 2 as an adjuvant, the low-responder mice produced antibody with relatively high titers.
Akaji
K
K
Hayashi
Y
Y
Fujii
N
N
Liu
T Y
TY
Berkower
I
I
Yajima
H
H
D000954:Antigens, Surface / Q000138:chemical synthesis* / Q000276:immunology; D006801:Humans; D010446:Peptide Fragments / Q000138:chemical synthesis* / Q000276:immunology; D015800:Protozoan Proteins
D000954:Antigens, Surface; D010446:Peptide Fragments; D015800:Protozoan Proteins; C041595:circumsporozoite protein, Protozoan