PMID- 28099196 OWN - NLM STAT- MEDLINE DCOM- 20180104 LR - 20231213 IS - 1537-4513 (Electronic) IS - 1524-9557 (Linking) VI - 40 IP - 3 DP - 2017 Apr TI - Use of Engineered Exosomes Expressing HLA and Costimulatory Molecules to Generate Antigen-specific CD8+ T Cells for Adoptive Cell Therapy. PG - 83-93 LID - 10.1097/CJI.0000000000000151 [doi] AB - Dendritic cell-derived exosomes (DEX) comprise an efficient stimulator of T cells. However, the production of sufficient DEX remains a barrier to their broad applicability in immunotherapeutic approaches. In previous studies, genetically engineered K562 have been used to generate artificial antigen presenting cells (AAPC). Here, we isolated exosomes from K562 cells (referred to as CoEX-A2s) engineered to express human leukocyte antigen (HLA)-A2 and costimulatory molecules such as CD80, CD83, and 41BBL. CoEX-A2s were capable of stimulating antigen-specific CD8 T cells both directly and indirectly via CoEX-A2 cross-dressed cells. Notably, CoEX-A2s also generated similar levels of HCMV pp65-specific and MART1-specific CD8 T cells as DEX in vitro. The results suggest that these novel exosomes may provide a crucial reagent for generating antigen-specific CD8 T cells for adoptive cell therapies against viral infection and tumors. FAU - Kim, Sueon AU - Kim S AD - *Catholic Hematopoietic Stem Cell Bank double daggerCancer Research Institute daggerDepartments of Microbiology, College of Medicine, The Catholic University of Korea, Seoul, Korea. FAU - Sohn, Hyun-Jung AU - Sohn HJ FAU - Lee, Hyun-Joo AU - Lee HJ FAU - Sohn, Dae-Hee AU - Sohn DH FAU - Hyun, Seung-Joo AU - Hyun SJ FAU - Cho, Hyun-Il AU - Cho HI FAU - Kim, Tai-Gyu AU - Kim TG LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Immunother JT - Journal of immunotherapy (Hagerstown, Md. : 1997) JID - 9706083 RN - 0 (4-1BB Ligand) RN - 0 (Antigens, CD) RN - 0 (B7-1 Antigen) RN - 0 (HLA-A2 Antigen) RN - 0 (Immunoglobulins) RN - 0 (MART-1 Antigen) RN - 0 (Membrane Glycoproteins) RN - 0 (Phosphoproteins) RN - 0 (Viral Matrix Proteins) RN - 0 (cytomegalovirus matrix protein 65kDa) SB - IM MH - 4-1BB Ligand/genetics/metabolism MH - Antigens, CD/genetics/metabolism MH - B7-1 Antigen/genetics/metabolism MH - CD8-Positive T-Lymphocytes/*immunology/transplantation MH - Cross-Priming MH - Dendritic Cells/pathology MH - Exosomes/genetics/*metabolism/pathology MH - Genetic Engineering MH - HLA-A2 Antigen/genetics/metabolism MH - Humans MH - Immunoglobulins/genetics/metabolism MH - Immunotherapy, Adoptive/*methods MH - K562 Cells MH - Lymphocyte Activation MH - MART-1 Antigen/immunology MH - Membrane Glycoproteins/genetics/metabolism MH - Neoplasms/immunology/*therapy MH - Phosphoproteins/immunology MH - Viral Matrix Proteins/immunology MH - Virus Diseases/immunology/*therapy MH - CD83 Antigen EDAT- 2017/01/19 06:00 MHDA- 2018/01/05 06:00 CRDT- 2017/01/19 06:00 PHST- 2017/01/19 06:00 [pubmed] PHST- 2018/01/05 06:00 [medline] PHST- 2017/01/19 06:00 [entrez] AID - 10.1097/CJI.0000000000000151 [doi] PST - ppublish SO - J Immunother. 2017 Apr;40(3):83-93. doi: 10.1097/CJI.0000000000000151.