|
1
|
Wang Z, Ran L, Chen C, Shi R, Dong Y, Li Y, Zhou X, Qi Y, Zhu P, Gao Y, Wu Y. Identification of HLA-A2-Restricted Mutant Epitopes from Neoantigens of Esophageal Squamous Cell Carcinoma. Vaccines (Basel) 2021; 9:vaccines9101118. [PMID: 34696226 PMCID: PMC8541546 DOI: 10.3390/vaccines9101118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Revised: 09/27/2021] [Accepted: 09/28/2021] [Indexed: 12/24/2022] Open
Abstract
Esophageal squamous cell carcinoma (ESCC), one of the deadliest gastrointestinal cancers, has had limited effective therapeutic strategies up to now. Accumulating evidence suggests that effective immunotherapy in cancer patients has been associated with T cells responsive to mutant peptides derived from neoantigens. Here, we selected 35 human leukocyte antigen-A2 (HLA-A2)-restricted mutant (MUT) peptides stemmed from neoantigens of ESCC. Among them, seven mutant peptides had potent binding affinity to HLA-A*0201 molecules and could form a stable peptide/HLA-A*0201 complex. Three mutant peptides (TP53-R267P, NFE2L2-D13N, and PCLO-E4090Q) of those were immunogenic and could induce the cytotoxic T lymphocytes (CTLs) recognizing mutant peptides presented on transfected cells in an HLA-A2-restricted and MUT peptide-specific manner. In addition, the CTL response in immunized HLA-A2.1/Kb transgenic (Tg) mice was enhanced by coupling MUT peptides to peptide WH, a peptide delivery carrier targeting Clec9a+ DCs. Then, the possible binding model conversions between the WT and MUT candidate peptides were analyzed by docking with the pockets of HLA-A*0201 molecule. We therefore propose a novel strategy and epitopes for immunotherapy of ESCC based on neoantigens.
Collapse
Affiliation(s)
- Zhiwei Wang
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China; (Z.W.); (L.R.); (C.C.); (R.S.); (Y.D.); (Y.L.); (X.Z.); (Y.Q.); (P.Z.)
| | - Ling Ran
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China; (Z.W.); (L.R.); (C.C.); (R.S.); (Y.D.); (Y.L.); (X.Z.); (Y.Q.); (P.Z.)
| | - Chunxia Chen
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China; (Z.W.); (L.R.); (C.C.); (R.S.); (Y.D.); (Y.L.); (X.Z.); (Y.Q.); (P.Z.)
| | - Ranran Shi
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China; (Z.W.); (L.R.); (C.C.); (R.S.); (Y.D.); (Y.L.); (X.Z.); (Y.Q.); (P.Z.)
| | - Yu Dong
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China; (Z.W.); (L.R.); (C.C.); (R.S.); (Y.D.); (Y.L.); (X.Z.); (Y.Q.); (P.Z.)
| | - Yubing Li
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China; (Z.W.); (L.R.); (C.C.); (R.S.); (Y.D.); (Y.L.); (X.Z.); (Y.Q.); (P.Z.)
| | - Xiuman Zhou
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China; (Z.W.); (L.R.); (C.C.); (R.S.); (Y.D.); (Y.L.); (X.Z.); (Y.Q.); (P.Z.)
| | - Yuanming Qi
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China; (Z.W.); (L.R.); (C.C.); (R.S.); (Y.D.); (Y.L.); (X.Z.); (Y.Q.); (P.Z.)
- International Joint Laboratory for Protein and Peptide Drugs of Henan Province, Zhengzhou University, Zhengzhou 450001, China
| | - Pingping Zhu
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China; (Z.W.); (L.R.); (C.C.); (R.S.); (Y.D.); (Y.L.); (X.Z.); (Y.Q.); (P.Z.)
- State Key Laboratory of Esophageal Cancer Prevention & Treatment, Zhengzhou University, Zhengzhou 450052, China
| | - Yanfeng Gao
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen 510080, China
- Correspondence: (Y.G.); (Y.W.); Tel./Fax: +86-371-6778-3235 (Y.W.)
| | - Yahong Wu
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China; (Z.W.); (L.R.); (C.C.); (R.S.); (Y.D.); (Y.L.); (X.Z.); (Y.Q.); (P.Z.)
- International Joint Laboratory for Protein and Peptide Drugs of Henan Province, Zhengzhou University, Zhengzhou 450001, China
- Correspondence: (Y.G.); (Y.W.); Tel./Fax: +86-371-6778-3235 (Y.W.)
| |
Collapse
|
|
2
|
Mori T, Yoshida M, Hazekawa M, Ishibashi D, Hatanaka Y, Nagao T, Kakehashi R, Kojima H, Uno R, Ozeki M, Kawasaki I, Yamashita T, Nishikawa J, Uchida T. Antimicrobial Activities of LL-37 Fragment Mutant-Poly (Lactic-Co-Glycolic) Acid Conjugate against Staphylococcus aureus, Escherichia coli, and Candida albicans. Int J Mol Sci 2021; 22:5097. [PMID: 34065861 DOI: 10.3390/ijms22105097] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 05/04/2021] [Accepted: 05/09/2021] [Indexed: 12/16/2022] Open
Abstract
Various peptides and their derivatives have been reported to exhibit antimicrobial activities. Although these activities have been examined against microorganisms, novel methods have recently emerged for conjugation of the biomaterials to improve their activities. Here, we prepared CKR12-PLGA, in which CKR12 (a mutated fragment of human cathelicidin peptide, LL-37) was conjugated with poly (lactic-co-glycolic) acid (PLGA), and compared the antimicrobial and antifungal activities of the conjugated peptide with those of FK13 (a small fragment of LL-37) and CKR12 alone. The prepared CKR12-PLGA was characterized by dynamic light scattering and measurement of the zeta potential, critical micellar concentration, and antimicrobial activities of the fragments and conjugate. Although CKR12 showed higher antibacterial activities than FK13 against Staphylococcus aureus and Escherichia coli, the antifungal activity of CKR12 was lower than that of FK13. CKR12-PLGA showed higher antibacterial activities against S. aureus and E. coli and higher antifungal activity against Candida albicans compared to those of FK13. Additionally, CKR12-PLGA showed no hemolytic activity in erythrocytes, and scanning and transmission electron microscopy suggested that CKR12-PLGA killed and disrupted the surface structure of microbial cells. Conjugation of antimicrobial peptide fragment analogues was a successful approach for obtaining increased microbial activity with minimized cytotoxicity.
Collapse
|