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Wang Y, Shi D, Zou W, Jiang Y, Wang T, Chen X, Ma C, Li W, Chen T, Burrows JF, Wang L, Zhou M. An Effective Modification Strategy to Build Multifunctional Peptides Based on a Trypsin Inhibitory Peptide of the Kunitz Family. Pharmaceutics 2024; 16:597. [PMID: 38794259 PMCID: PMC11125039 DOI: 10.3390/pharmaceutics16050597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 04/18/2024] [Accepted: 04/25/2024] [Indexed: 05/26/2024] Open
Abstract
Peptides with antimicrobial activity or protease inhibitory activity are potential candidates to supplement traditional antibiotics or cancer chemotherapies. However, the potential of many peptides are limited by drawbacks such as cytotoxicity or susceptibility to hydrolysis. Therefore, strategies to modify the structure of promising peptides may represent an effective approach for developing more promising clinical candidates. In this study, the mature peptide OSTI-1949, a Kunitz-type inhibitor from Odorrana schmackeri, and four designed analogues were successfully synthesised. In contrast to the parent peptide, the analogues showed impressive multi-functionality including antimicrobial, anticancer, and trypsin inhibitory activities. In terms of safety, there were no obvious changes observed in the haemolytic activity at the highest tested concentration, and the analogue OSTI-2461 showed an increase in activity against cancer cell lines without cytotoxicity to normal cells (HaCaT). In summary, through structural modification of a natural Kunitz-type peptide, the biological activity of analogues was improved whilst retaining low cytotoxicity. The strategy of helicity enhancement by forming an artificial α-helix and ß-sheet structure provides a promising way to develop original bioactive peptides for clinical therapeutics.
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Affiliation(s)
- Ying Wang
- Natural Drug Discovery Group, School of Pharmacy, Queen’s University Belfast, Belfast BT9 7BL, Northern Ireland, UK; (Y.W.); (W.Z.); (Y.J.); (T.W.); (C.M.); (T.C.); (J.F.B.); (L.W.); (M.Z.)
| | - Daning Shi
- Chinese Academy of Agricultural Sciences, No.12 Zhongguancun South Street, Haidian District, Beijing 100081, China;
| | - Wanchen Zou
- Natural Drug Discovery Group, School of Pharmacy, Queen’s University Belfast, Belfast BT9 7BL, Northern Ireland, UK; (Y.W.); (W.Z.); (Y.J.); (T.W.); (C.M.); (T.C.); (J.F.B.); (L.W.); (M.Z.)
- College of Chinese Medicinal Materials, Jilin Provincial International Joint Research Center for the Development and Utilization of Authentic Medicinal Materials, Jilin Agricultural University, Changchun 130118, China
| | - Yangyang Jiang
- Natural Drug Discovery Group, School of Pharmacy, Queen’s University Belfast, Belfast BT9 7BL, Northern Ireland, UK; (Y.W.); (W.Z.); (Y.J.); (T.W.); (C.M.); (T.C.); (J.F.B.); (L.W.); (M.Z.)
| | - Tao Wang
- Natural Drug Discovery Group, School of Pharmacy, Queen’s University Belfast, Belfast BT9 7BL, Northern Ireland, UK; (Y.W.); (W.Z.); (Y.J.); (T.W.); (C.M.); (T.C.); (J.F.B.); (L.W.); (M.Z.)
| | - Xiaoling Chen
- Natural Drug Discovery Group, School of Pharmacy, Queen’s University Belfast, Belfast BT9 7BL, Northern Ireland, UK; (Y.W.); (W.Z.); (Y.J.); (T.W.); (C.M.); (T.C.); (J.F.B.); (L.W.); (M.Z.)
| | - Chengbang Ma
- Natural Drug Discovery Group, School of Pharmacy, Queen’s University Belfast, Belfast BT9 7BL, Northern Ireland, UK; (Y.W.); (W.Z.); (Y.J.); (T.W.); (C.M.); (T.C.); (J.F.B.); (L.W.); (M.Z.)
| | - Wei Li
- College of Chinese Medicinal Materials, Jilin Provincial International Joint Research Center for the Development and Utilization of Authentic Medicinal Materials, Jilin Agricultural University, Changchun 130118, China
| | - Tianbao Chen
- Natural Drug Discovery Group, School of Pharmacy, Queen’s University Belfast, Belfast BT9 7BL, Northern Ireland, UK; (Y.W.); (W.Z.); (Y.J.); (T.W.); (C.M.); (T.C.); (J.F.B.); (L.W.); (M.Z.)
| | - James F. Burrows
- Natural Drug Discovery Group, School of Pharmacy, Queen’s University Belfast, Belfast BT9 7BL, Northern Ireland, UK; (Y.W.); (W.Z.); (Y.J.); (T.W.); (C.M.); (T.C.); (J.F.B.); (L.W.); (M.Z.)
| | - Lei Wang
- Natural Drug Discovery Group, School of Pharmacy, Queen’s University Belfast, Belfast BT9 7BL, Northern Ireland, UK; (Y.W.); (W.Z.); (Y.J.); (T.W.); (C.M.); (T.C.); (J.F.B.); (L.W.); (M.Z.)
| | - Mei Zhou
- Natural Drug Discovery Group, School of Pharmacy, Queen’s University Belfast, Belfast BT9 7BL, Northern Ireland, UK; (Y.W.); (W.Z.); (Y.J.); (T.W.); (C.M.); (T.C.); (J.F.B.); (L.W.); (M.Z.)
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Samgina TY, Vasileva ID, Trebše P, Torkar G, Surin AK, Meng Z, Zubarev RA, Lebedev AT. Tandem Mass Spectrometry de novo Sequencing of the Skin Defense Peptides of the Central Slovenian Agile Frog Rana dalmatina. Molecules 2023; 28:7118. [PMID: 37894596 PMCID: PMC10608968 DOI: 10.3390/molecules28207118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 10/11/2023] [Accepted: 10/13/2023] [Indexed: 10/29/2023] Open
Abstract
Peptides released on frogs' skin in a stress situation represent their only weapon against micro-organisms and predators. Every species and even population of frog possesses its own peptidome being appropriate for their habitat. Skin peptides are considered potential pharmaceuticals, while the whole peptidome may be treated as a taxonomic characteristic of each particular population. Continuing the studies on frog peptides, here we report the peptidome composition of the Central Slovenian agile frog Rana dalmatina population. The detection and top-down de novo sequencing of the corresponding peptides was conducted exclusively by tandem mass spectrometry without using any chemical derivatization procedures. Collision-induced dissociation (CID), higher energy collision-induced dissociation (HCD), electron transfer dissociation (ETD) and combined MS3 method EThcD with stepwise increase of HCD energy were used for that purpose. MS/MS revealed the whole sequence of the detected peptides including differentiation between isomeric Leu/Ile, and the sequence portion hidden in the disulfide cycle. The array of the discovered peptide families (brevinins 1 and 2, melittin-related peptides (MRPs), temporins and bradykinin-related peptides (BRPs)) is quite similar to that of R. temporaria. Since the genome of this frog remains unknown, the obtained results were compared with the recently published transcriptome of R. dalmatina.
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Affiliation(s)
- Tatiana Yu. Samgina
- Department of Materials Science, MSU-BIT University, Shenzhen 517182, China
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia;
| | - Irina D. Vasileva
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia;
| | - Polonca Trebše
- Faculty of Health Sciences, University of Ljubljana Zdravstvena Pot 5, 1000 Ljubljana, Slovenia;
| | - Gregor Torkar
- Department for Biology, Chemistry and Home Economics, University of Ljubljana Faculty of Education, Kardeljeva Ploščad 16, 1000 Ljubljana, Slovenia;
| | - Alexey K. Surin
- Pushchino Branch, Shemyakin–Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Prospekt Nauki 6, Pushchino, 142290 Moscow, Russia;
| | - Zhaowei Meng
- Department of Medicinal Biochemistry and Biophysics, Division of Molecular Biometry, Karolinska Institutet, SE-171 77 Stockholm, Sweden; (Z.M.); (R.A.Z.)
| | - Roman A. Zubarev
- Department of Medicinal Biochemistry and Biophysics, Division of Molecular Biometry, Karolinska Institutet, SE-171 77 Stockholm, Sweden; (Z.M.); (R.A.Z.)
- The National Medical Research Center for Endocrinology, 115478 Moscow, Russia
- Department of Pharmacological & Technological Chemistry, I.M. Sechenov First Moscow State Medical University, 119146 Moscow, Russia
| | - Albert T. Lebedev
- Department of Materials Science, MSU-BIT University, Shenzhen 517182, China
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia;
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Chen C, Fan X, Hu Y, Zhou C, Sun Y, Du L, Pan D. Effect of different salt substitutions on the decomposition of lipids and volatile flavor compounds in restructured duck ham. Lebensm Wiss Technol 2023. [DOI: 10.1016/j.lwt.2023.114541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Yao J, Yin W, Chen Y, Chen X, Jiang Y, Wang T, Ma C, Zhou M, Chen T, Shaw C, Wang L. Conjugation of a Cationic Cell-Penetrating Peptide with a Novel Kunitzin-like Trypsin Inhibitor: New Insights for Enhancement of Peptide Bioactivities. Pharmaceutics 2022; 14:pharmaceutics14091805. [PMID: 36145553 PMCID: PMC9501525 DOI: 10.3390/pharmaceutics14091805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 08/21/2022] [Accepted: 08/23/2022] [Indexed: 11/16/2022] Open
Abstract
Cationic cell-penetrating peptides (CPPs), such as transactivator of transcription (TAT) peptide, have been proposed as effective drug carriers to improve intracellular delivery of biological macromolecules. Amphibian skin-derived Kunitz-type trypsin inhibitors (KTIs), short counterparts of KTIs from plant sources, were found to possess potent serine protease inhibitory activity. However, poor transmembrane permeability of these molecules has largely hindered the study of the full spectrum of their biological actions. As a result, this study aimed to extend the biological activities of amphibian KTIs by their conjugation to cationic CPPs. Herein, a novel peptide (kunitzin-OV2) and its phenylalanine-substituted analogue F9-kunitzin-OV2 (F9-KOV2) were evaluated for inhibition of trypsin/chymotrypsin and showed weak antibacterial activity against Escherichia coli (E. coli). As expected, the conjugation to TAT peptide did not increase membrane lysis compared with the original kunitzin-OV2, but effectively assisted this complex to enter cells. TAT-kunitzin-OV2 (TAT-KOV2) exhibited a 32-fold increase in antibacterial activity and an enhanced bactericidal rate against E. coli. In addition, the conjugation enabled the parent peptides to exhibit antiproliferative activity against cancer cells. Interestingly, TAT-F9-kunitzin-OV2 (TAT-F9-KOV2) showed stronger antiproliferative activity against human breast cancer (MCF-7) and human glioblastoma (U251MG) cell lines, which TAT-KOV2 did not possess. Moreover, TAT-F9-KOV2 showed a 20–25-fold increase in antiproliferative capacity against human lung cancer (H157, H460) cell lines compared with TAT-KOV2. Therefore, the conjugation of CPPs effectively solves the problem of cell penetration that short KTIs lack and provides evidence for new potential applications for their subsequent development as new antibacterial and anticancer agents.
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Affiliation(s)
- Junting Yao
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Weining Yin
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Yuqing Chen
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK
- Department of Pharmacy, Affiliated Hospital of Nantong University, Nantong 226001, China
| | - Xiaoling Chen
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK
- Correspondence: (X.C.); (L.W.)
| | - Yangyang Jiang
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Tao Wang
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Chengbang Ma
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Mei Zhou
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Tianbao Chen
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Chris Shaw
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK
| | - Lei Wang
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK
- Correspondence: (X.C.); (L.W.)
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Chen Y, Xi X, Ma C, Zhou M, Chen X, Ye Z, Ge L, Wu Q, Chen T, Wang L, Kwok HF. Structure-Activity Relationship and Molecular Docking of a Kunitz-Like Trypsin Inhibitor, Kunitzin-AH, from the Skin Secretion of Amolops hainanensis. Pharmaceutics 2021; 13:pharmaceutics13070966. [PMID: 34206897 PMCID: PMC8309051 DOI: 10.3390/pharmaceutics13070966] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 06/16/2021] [Accepted: 06/21/2021] [Indexed: 01/10/2023] Open
Abstract
Kunitz-like trypsin inhibitors are one of the most noteworthy research objects owing to their significance in pharmacological studies, including anticarcinogenic activity, obesity regulation and anticoagulation. In the current study, a novel Kunitz-like trypsin inhibitor, Kunitzin-AH, was isolated from the skin secretion of Amolops hainanensis. The novel peptide displayed a modest trypsin inhibitory activity with the inhibitor constant (Ki) value of 1.18 ± 0.08 µM without inducing damage to healthy horse erythrocytes. Then, a series of shortened variants of Kunitzin-AH were designed by truncating a peptide loop and site mutation inside the loop to illustrate the structure–activity relationship of the trypsin inhibition function. Among the variants, a significant decrease was observed for the Cys-Cys loop domain, while the extension of an Arg at N-terminus (RCKAAFC) retained the inhibitory activity, indicating that the -RCK-motif is essential in forming the reactive domain for exerting the inhibitory activity. Furthermore, substitutions of Ala by hydrophobic or hydrophilic residues decreased the activity, indicating suitable steric hindrance provides convenience for the combination of trypsin. Additionally, the conformational simulation of the analogues processed with Chimera and Gromacs and further combination simulations between the peptides and trypsin conducted with HDOCK offered a potential opportunity for the natural trypsin inhibitory drug design. The truncated sequence, AH-798, may be a good replacement for the full-length peptide, and can be optimized via cyclization for further study.
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Affiliation(s)
- Yuqing Chen
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK; (Y.C.); (C.M.); (M.Z.); (X.C.); (Z.Y.); (T.C.); (L.W.)
| | - Xinping Xi
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK; (Y.C.); (C.M.); (M.Z.); (X.C.); (Z.Y.); (T.C.); (L.W.)
- Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Avenida da Universidade, Taipa, Macau, China
- Correspondence: (X.X.); (H.F.K.)
| | - Chengbang Ma
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK; (Y.C.); (C.M.); (M.Z.); (X.C.); (Z.Y.); (T.C.); (L.W.)
| | - Mei Zhou
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK; (Y.C.); (C.M.); (M.Z.); (X.C.); (Z.Y.); (T.C.); (L.W.)
| | - Xiaoling Chen
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK; (Y.C.); (C.M.); (M.Z.); (X.C.); (Z.Y.); (T.C.); (L.W.)
| | - Zhuming Ye
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK; (Y.C.); (C.M.); (M.Z.); (X.C.); (Z.Y.); (T.C.); (L.W.)
| | - Lilin Ge
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China; (L.G.); (Q.W.)
| | - Qinan Wu
- College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China; (L.G.); (Q.W.)
| | - Tianbao Chen
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK; (Y.C.); (C.M.); (M.Z.); (X.C.); (Z.Y.); (T.C.); (L.W.)
| | - Lei Wang
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK; (Y.C.); (C.M.); (M.Z.); (X.C.); (Z.Y.); (T.C.); (L.W.)
| | - Hang Fai Kwok
- Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Avenida da Universidade, Taipa, Macau, China
- Correspondence: (X.X.); (H.F.K.)
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A Novel Kunitzin-Like Trypsin Inhibitor Isolated from Defensive Skin Secretion of Odorrana versabilis. Biomolecules 2019; 9:biom9070254. [PMID: 31261722 PMCID: PMC6681348 DOI: 10.3390/biom9070254] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 06/21/2019] [Accepted: 06/27/2019] [Indexed: 01/10/2023] Open
Abstract
Protease inhibitors that were identified from amphibian skin secretions with low molecular weights and potent inhibitory activity were thought to be potential candidates for novel peptide drugs. Here, a novel peptide with trypsin inhibitory activity was found in the skin secretion of the Chinese bamboo leaf odorous frog, Odorrana versabilis. Based on the sequence alignments of sequencing results, the novel peptide (ALKYPFRCKAAFC) was named as Kunitzin-OV. The synthetic replicate of Kunitzin-OV was subjected to a series of functional assays, and it exhibited a trypsin inhibitory activity with a Ki value of 3.042 µM, whereas, when Lys-9 at P1 position was substituted by Phe, trypsin inhibitory activity was undetected and the chymotrypsin inhibitory activity was optimized with a Ki value of 2.874 µM. However, its protease-binding loop was catabolized by trypsin during the trypsin cleavage test. In conclusion, Kunizin-OV is a novel peptide with trypsin inhibitory activity as a member of kunitzins, which is a non-typical Kunitz-like trypsin inhibitor with a highly conserved reactive site (K-A) and quite a short sequence.
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Yang Z, He S, Wang J, Yang Y, Zhang L, Li Y, Shan A. Rational Design of Short Peptide Variants by Using Kunitzin-RE, an Amphibian-Derived Bioactivity Peptide, for Acquired Potent Broad-Spectrum Antimicrobial and Improved Therapeutic Potential of Commensalism Coinfection of Pathogens. J Med Chem 2019; 62:4586-4605. [PMID: 30958004 DOI: 10.1021/acs.jmedchem.9b00149] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Commensalism coinfection of pathogens has seriously jeopardized human health. Currently, Kunitzin-RE, as an amphibian-derived bioactivity peptide, is regarded as a potential antimicrobial candidate. However, its antimicrobial properties were unsatisfactory. In this study, a set of shortened variants of Kunitzin-RE was developed by the interception of a peptide fragment and single-site mutation to investigate the effect of chain length, positive charge, hydrophobicity, amphipathicity, and secondary structure on antimicrobial properties. Among them, W8 (AARIILRWRFR) significantly broadened the antimicrobial spectrum and showed the highest antimicrobial activity (GMall = 2.48 μM) against all the fungi and bacteria tested. Additionally, W8 showed high cell selectivity and salt tolerance in vitro, whereas it showed high effectiveness against mice keratitis cause by infection by C. albicans 2.2086. Additionally, it also had obviously lipopolysaccharide-binding ability and a potent membrane-disruptive mechanism. Overall, these findings contributed to the design of short antimicrobial peptides and to combat the serious threat of commensalism coinfection of pathogens.
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Affiliation(s)
- Zhanyi Yang
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Shiqi He
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Jiajun Wang
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Yi Yang
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Licong Zhang
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Yanbing Li
- College of Animal Science and Veterinary Medicine , Bayi Agricultural University , Daqing 163000 , P. R. China
| | - Anshan Shan
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
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Identification of Arenin, a Novel Kunitz-Like Polypeptide from the Skin Secretions of Dryophytes arenicolor. Int J Mol Sci 2018; 19:ijms19113644. [PMID: 30463246 PMCID: PMC6274936 DOI: 10.3390/ijms19113644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Revised: 11/16/2018] [Accepted: 11/17/2018] [Indexed: 11/17/2022] Open
Abstract
Amphibian skin secretions are enriched with complex cocktails of bioactive molecules such as proteins, peptides, biogenic amines, alkaloids guanidine derivatives, steroids and other minor components spanning a wide spectrum of pharmacological actions exploited for centuries in folk medicine. This study presents evidence on the protein profile of the skin secretions of the canyon tree frog, Dryophytes arenicolor. At the same time, it presents the reverse-phase liquid chromatography isolation, mass spectrometry characterization and identification at mRNA level of a novel 58 amino acids Kunitz-like polypeptide from the skin secretions of Dryophytes arenicolor, arenin. Cell viability assays performed on HDFa, CaCo2 and MCF7 cells cultured with different concentrations of arenin showed a discrete effect at low concentrations (2, 4, 8 and 16 µg/mL) suggesting a multi-target interaction in a hormetic-like dose-response. Further work is required to investigate the mechanisms underlying the variable effect on cell viability produced by different concentrations of arenin.
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Sang M, Wu Q, Xi X, Ma C, Wang L, Zhou M, Burrows JF, Chen T. Identification and target-modifications of temporin-PE: A novel antimicrobial peptide in the defensive skin secretions of the edible frog, Pelophylax kl. esculentus. Biochem Biophys Res Commun 2017; 495:2539-2546. [PMID: 29191658 DOI: 10.1016/j.bbrc.2017.11.173] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 11/27/2017] [Indexed: 12/13/2022]
Abstract
A potent natural antimicrobial peptide named temporin-PE was identified and encoded from the skin secretions of Pelophylax kl. esculentus via "shotgun" cloning and LC-MS/MS fragmentation analysis. Target-modifications were carried out to further enhance the antimicrobial and anti-proliferative bioactivities, whilst decreasing the hemolytic effect. A range of bioassays demonstrated that replacing a proline with a tyrosine residue resulted in a loss of the bioactivity against Gram-negative bacteria, but dramatically improved the hemolytic and anti-proliferative activity, indicating the FLP- motif influences the hemolytic activity of temporins. Moreover, the coupling of TAT to the peptide dramatically improved its antimicrobial activity, indicating coupling TAT to these peptides could be considered as a potential tool to improve their antimicrobial activity. Overall, we have shown that targeted modifications of this natural antimicrobial peptide can adjust its bioactivities to help its development as an antibiotic or anti-proliferative agent.
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Affiliation(s)
- Mengru Sang
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, 210023, China; School of Pharmacy, Queen's University, Belfast BT9 7BL, Northern Ireland, UK
| | - Qinan Wu
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, 210023, China; Collaborative Innovation Centre of Chinese Medicinal Resources Industrialization, Nanjing, Jiangsu, 210023, China; National and Local Collaborative Engineering, Centre of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing, Jiangsu, 210023, China.
| | - Xinping Xi
- School of Pharmacy, Queen's University, Belfast BT9 7BL, Northern Ireland, UK.
| | - Chengbang Ma
- School of Pharmacy, Queen's University, Belfast BT9 7BL, Northern Ireland, UK
| | - Lei Wang
- School of Pharmacy, Queen's University, Belfast BT9 7BL, Northern Ireland, UK
| | - Mei Zhou
- School of Pharmacy, Queen's University, Belfast BT9 7BL, Northern Ireland, UK
| | - James F Burrows
- School of Pharmacy, Queen's University, Belfast BT9 7BL, Northern Ireland, UK
| | - Tianbao Chen
- School of Pharmacy, Queen's University, Belfast BT9 7BL, Northern Ireland, UK
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Identification, chemical synthesis and heterologous expression of an antinociceptive peptide from the veined tree frog Trachycephalus typhonius. Process Biochem 2017. [DOI: 10.1016/j.procbio.2017.07.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Chen X, Wang H, Wang L, Zhou M, Chen T, Shaw C. Identification of Miscellaneous Peptides from the Skin Secretion of the European Edible Frog, Pelophylax kl. Esculentus. Protein J 2017; 35:291-9. [PMID: 27402449 DOI: 10.1007/s10930-016-9672-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The chemical compounds synthesised and secreted from the dermal glands of amphibian have diverse bioactivities that play key roles in the hosts' innate immune system and in causing diverse pharmacological effects in predators that may ingest the defensive skin secretions. As new biotechnological methods have developed, increasing numbers of novel peptides with novel activities have been discovered from this source of natural compounds. In this study, a number of defensive skin secretion peptide sequences were obtained from the European edible frog, P. kl. esculentus, using a 'shotgun' cloning technique developed previously within our laboratory. Some of these sequences have been previously reported but had either obtained from other species or were isolated using different methods. Two new skin peptides are described here for the first time. Esculentin-2c and Brevinin-2Tbe belong to the Esculentin-2 and Brevinin-2 families, respectively, and both are very similar to their respective analogues but with a few amino acid differences. Further, [Asn-3, Lys-6, Phe-13] 3-14-bombesin isolated previously from the skin of the marsh frog, Rana ridibunda, was identified here in the skin of P. kl. esculentus. Studies such as this can provide a rapid elucidation of peptide and corresponding DNA sequences from unstudied species of frogs and can rapidly provide a basis for related scientific studies such as those involved in systematic or the evolution of a large diverse gene family and usage by biomedical researchers as a source of potential novel drug leads or pharmacological agents.
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Affiliation(s)
- Xiaole Chen
- School of Pharmacy, Fujian Medical University, Fuzhou, Fujian, China.
| | - He Wang
- School of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian, China.
| | - Lei Wang
- Medicine Natural Peptide Discovery Group, School of Pharmacy, Queen's University, Belfast, BT9 7BL, Northern Ireland, UK
| | - Mei Zhou
- Medicine Natural Peptide Discovery Group, School of Pharmacy, Queen's University, Belfast, BT9 7BL, Northern Ireland, UK
| | - Tianbao Chen
- Medicine Natural Peptide Discovery Group, School of Pharmacy, Queen's University, Belfast, BT9 7BL, Northern Ireland, UK
| | - Chris Shaw
- Medicine Natural Peptide Discovery Group, School of Pharmacy, Queen's University, Belfast, BT9 7BL, Northern Ireland, UK
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