Phage display is a technology which can display the foreign peptides or proteins on the surface of the phages to interact with exterior molecules/materials. Using this technology, we have constructed the antibody and peptide libraries to select the specific ligands binding to the target molecules. We presented here two types of the studies, one is the isolation of human antibody fragments specific to tumor cells from human single chain Fv (scFv) antibody fragment phage library and the other is the design of peptide ligands specific to human IgG using a random peptide phage library. ATL (adult T cell leukemia) is a disease caused by the infection of a retrovirus HTLV-1 to CD4 T cells. Its carrier is estimated to be 10–20 million people worldwide and especially in Japan the carrier is distributed in south area of Kyushu Island. To find a new tumor marker for ATL and a candidate of antibody therapeutics of ATL, we tried to isolate specific antibody toward the S1T cells (ATL patient-derived cell line) from our scFv library using biopanning on a flow cytometer. The successfully isolated clone maintained the binding specificities to S1T cells and indicated the strong cell death-inducing activity, suggesting this small fragment can be a candidate of antibody therapeutics for ATL. On the other hand, we also isolated the specific peptides toward human immunoglobulin G (IgG) from the random peptide library constructed on T7 phage display system. The isolated IgG-specific peptides were classified to two types of the peptides, Type I and II. Type I peptides recognized the normal conformation of IgG and was applied for the purification of IgG from human serum using the peptide-conjugated column. Type II peptide did not bind to the normal conformation of IgG but specifically recognized the alternative conformation of IgG induced by acidic condition. We would like to discuss about the potentials in the applications of these ligand molecules for the clinical and industrial uses.
저자
Yuji ITO [ Department of Chemistry and Bioscience, Graduate School of Science and Engineering, Kagoshima University, JAPAN. ]
한국생물공학회 [The Korean Society for Biotechnology and Bioengineering]
설립연도
1984
분야
공학>생물공학
소개
이 법인은 생물 공학의 발전과 보급에 이바지하고, 회원 상호 간의 연구 협력과 친목을 도모함을 목적으로 한다
1. 생물공학 분야의 발전을 위한 연구 협력
2. 생물공학의 실용화를 촉진시키기 위한 산학 협동
3. 학술연구 발표회, 강연회, 연수회 등 학술활동의 개최
4. 국,영문 학술지,소식지,학술회의 Proceedings 및 학술도서의 발간
5. 생물공학 발전을 위한 정책 건의
6. 기타 국제 교류 등 본 학회의 목적 달성을 위한 제반 활동