101
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Samgina TY, Vasileva ID, Kovalev SV, Trebse P, Torkar G, Surin AK, Zubarev RA, Lebedev AT. Differentiation of Central Slovenian and Moscow populations of Rana temporaria frogs using peptide biomarkers of temporins family. Anal Bioanal Chem 2021; 413:5333-5347. [PMID: 34235566 DOI: 10.1007/s00216-021-03506-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Revised: 06/22/2021] [Accepted: 06/25/2021] [Indexed: 12/18/2022]
Abstract
Skin secretion represents the only means of defense for the majority of frog species. That phenomenon is based on the fact that the main components of the secretion are peptides demonstrating greatly varying types of bioactivity. They fulfill regulatory functions, fight microorganisms and may be even helpful against predators. These peptides are considered to be rather promising pharmaceuticals of future generation as according to the present knowledge microorganisms are unlikely to develop resistance to them. Mass spectrometry sequencing of these peptides is the most efficient first step of their study providing reliably their primary structures, i.e., amino acids sequence and S-S bond motif. Besides discovering new bioactive peptides, mass spectrometry appears to be an efficient tool of taxonomy studies, allowing for distinguishing not only between closely related species, but also between populations of the same species. Application of several tandem mass spectrometry tools (CID, HCD, ETD, EThcD) available with Orbitrap mass analyzer allowed us to obtain full sequence of about 60 peptides in the secretion of Slovenian population of brown ranid frog Rana temporaria. The problem of sequence inside C-terminal cycle formed by two Cys and differentiation of isomeric Leu and Ile residues was done in top-down mode without any derivatization steps. Besides general biomarkers of Rana temporaria species, Central Slovenian population of Rana temporaria demonstrates six novel temporins and one brevinin 1, which may be treated as biomarkers of that population.
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Affiliation(s)
- T Yu Samgina
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia.
| | - I D Vasileva
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - S V Kovalev
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - P Trebse
- University of Ljubljana Faculty of Health Sciences, Zdravstvena pot 5, 1000, Ljubljana, Slovenia
| | - G Torkar
- Department for Biology, Chemistry and Home Economics, University of Ljubljana Faculty of Education, Kardeljeva ploščad 16, 1000, Ljubljana, Slovenia
| | - A K Surin
- Pushchino Branch, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Prospekt Nauki 6, Pushchino, Moscow, 142290, Russia
| | - R A Zubarev
- Department of Medicinal Biochemistry and Biophysics, Division of Molecular Biometry, Karolinska Institutet, 17177, Stockholm, Sweden.,Department of Pharmacological & Technological Chemistry, I.M. Sechenov First Moscow State Medical University, Moscow, 119146, Russia
| | - A T Lebedev
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia.
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102
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Cuesta SA, Reinoso C, Morales F, Pilaquinga F, Morán-Marcillo G, Proaño-Bolaños C, Blasco-Zúñiga A, Rivera M, Meneses L. Novel antimicrobial cruzioseptin peptides extracted from the splendid leaf frog, Cruziohyla calcarifer. Amino Acids 2021; 53:853-868. [PMID: 33942149 DOI: 10.1007/s00726-021-02986-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 04/21/2021] [Indexed: 11/25/2022]
Abstract
Antimicrobial peptides (AMPs) constitute part of a broad range of bioactive compounds present on diverse organisms, including frogs. Peptides, produced in the granular glands of amphibian skin, constitute a component of their innate immune response, providing protection against pathogenic microorganisms. In this work, two novel cruzioseptins peptides, cruzioseptin-16 and -17, extracted from the splendid leaf frog Cruziohyla calcarifer are presented. These peptides were identified using molecular cloning and tandem mass spectrometry. Later, peptides were synthetized using solid-phase peptide synthesis, and their minimal inhibitory concentration and haemolytic activity were tested. Furthermore, these two cruzioseptins plus three previously reported (CZS-1, CZS-2, CZS-3) were computationally characterized. Results show that cruzioseptins are 21-23 residues long alpha helical cationic peptides, with antimicrobial activity against E. coli, S. aureus, and C. albicans and low haemolytic effect. Docking results agree with the principal action mechanism of cationic AMPs that goes through cell membrane disruption due to electrostatic interactions between cationic residues in the cruzioseptins and negative phosphate groups in the pathogen cell membrane. An action mechanism through enzymes inhibition was also tried, but no conclusive results about this mechanism were obtained.
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Affiliation(s)
- Sebastian A Cuesta
- Laboratorio de Química Computacional, Escuela de Ciencias Químicas, Facultad de Ciencias Exactas y Naturales, Pontificia Universidad Católica del Ecuador, Av. 12 de octubre 1076 Apartado: 17-01-2184, Quito, Ecuador
| | - Camila Reinoso
- Laboratorio de Química Computacional, Escuela de Ciencias Químicas, Facultad de Ciencias Exactas y Naturales, Pontificia Universidad Católica del Ecuador, Av. 12 de octubre 1076 Apartado: 17-01-2184, Quito, Ecuador
| | - Felipe Morales
- Laboratorio de Química Computacional, Escuela de Ciencias Químicas, Facultad de Ciencias Exactas y Naturales, Pontificia Universidad Católica del Ecuador, Av. 12 de octubre 1076 Apartado: 17-01-2184, Quito, Ecuador
| | - Fernanda Pilaquinga
- Laboratorio de Química Computacional, Escuela de Ciencias Químicas, Facultad de Ciencias Exactas y Naturales, Pontificia Universidad Católica del Ecuador, Av. 12 de octubre 1076 Apartado: 17-01-2184, Quito, Ecuador
| | - Giovanna Morán-Marcillo
- Laboratory of Molecular Biology and Biochemistry, Biomolecules Discovery Group, Universidad Regional Amazónica Ikiam, Km 7 ½ vía Muyuna, 150150, Tena, Ecuador
| | - Carolina Proaño-Bolaños
- Laboratory of Molecular Biology and Biochemistry, Biomolecules Discovery Group, Universidad Regional Amazónica Ikiam, Km 7 ½ vía Muyuna, 150150, Tena, Ecuador
- Natural Drug Discovery Group, School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, BT9 7BL, Belfast, Northern Ireland, UK
| | - Ailín Blasco-Zúñiga
- Laboratorio de Investigación en Citogenética y Biomoléculas de Anfibios (LICBA), Facultad de Ciencias Exactas y Naturales, Centro de Investigación para la Salud en América Latina-CISeAL, Pontificia Universidad Católica del Ecuador, Av. 12 de octubre 1076 Apartado: 17-01-2184, Quito, Ecuador
- Dirección Nacional de Biodiversidad, Ministerio del Ambiente del Ecuador, Madrid 1159 y Andalucía, Quito, Ecuador
| | - Miryan Rivera
- Laboratorio de Investigación en Citogenética y Biomoléculas de Anfibios (LICBA), Facultad de Ciencias Exactas y Naturales, Centro de Investigación para la Salud en América Latina-CISeAL, Pontificia Universidad Católica del Ecuador, Av. 12 de octubre 1076 Apartado: 17-01-2184, Quito, Ecuador
| | - Lorena Meneses
- Laboratorio de Química Computacional, Escuela de Ciencias Químicas, Facultad de Ciencias Exactas y Naturales, Pontificia Universidad Católica del Ecuador, Av. 12 de octubre 1076 Apartado: 17-01-2184, Quito, Ecuador.
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103
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Antimicrobial, anti-biofilm properties of three naturally occurring antimicrobial peptides against spoilage bacteria, and their synergistic effect with chemical preservatives in food storage. Food Control 2021. [DOI: 10.1016/j.foodcont.2020.107729] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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104
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Liscano Y, Medina L, Oñate-Garzón J, Gúzman F, Pickholz M, Delgado JP. In Silico Selection and Evaluation of Pugnins with Antibacterial and Anticancer Activity Using Skin Transcriptome of Treefrog ( Boana pugnax). Pharmaceutics 2021; 13:578. [PMID: 33919639 PMCID: PMC8074116 DOI: 10.3390/pharmaceutics13040578] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 04/10/2021] [Accepted: 04/10/2021] [Indexed: 12/14/2022] Open
Abstract
In order to combat bacterial and cancer resistance, we identified peptides (pugnins) with dual antibacterial l-anticancer activity from the Boana pugnax (B. pugnax) skin transcriptome through in silico analysis. Pugnins A and B were selected owing to their high similarity to the DS4.3 peptide, which served as a template for their alignment to the B. pugnax transcriptome, as well as their function as part of a voltage-dependent potassium channel protein. The secondary peptide structure stability in aqueous medium was evaluated as well, and after interaction with the Escherichia coli (E. coli) membrane model using molecular dynamics. These pugnins were synthesized via solid-phase synthesis strategy and verified by Reverse phase high-performance liquid chromatography (RP-HPLC) and mass spectrometry. Subsequently, their alpha-helix structure was determined by circular dichroism, after which antibacterial tests were then performed to evaluate their antimicrobial activity. Cytotoxicity tests against cancer cells also showed selectivity of pugnin A toward breast cancer (MFC7) cells, and pugnin B toward prostate cancer (PC3) cells. Alternatively, flow cytometry revealed necrotic cell damage with a major cytotoxic effect on human keratinocytes (HaCaT) control cells. Therefore, the pugnins found in the transcriptome of B. pugnax present dual antibacterial-anticancer activity with reduced selectivity to normal eukaryotic cells.
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Affiliation(s)
- Yamil Liscano
- Grupo de Investigación en Química y Biotecnología (QUIBIO), Facultad de Ciencias Básicas, Universidad Santiago de Cali, Calle 5 N° 62-00, Cali 760035, Colombia;
- Grupo Genética, Regeneración y Cáncer, Facultad de Ciencias Exactas y Naturales, Instituto de Biología, Universidad de Antioquia, Medellín 050010, Colombia;
| | - Laura Medina
- Grupo Genética, Regeneración y Cáncer, Facultad de Ciencias Exactas y Naturales, Instituto de Biología, Universidad de Antioquia, Medellín 050010, Colombia;
| | - Jose Oñate-Garzón
- Grupo de Investigación en Química y Biotecnología (QUIBIO), Facultad de Ciencias Básicas, Universidad Santiago de Cali, Calle 5 N° 62-00, Cali 760035, Colombia;
| | - Fanny Gúzman
- Núcleo de Biotecnología Curauma, Pontificia Universidad Católica de Valparaíso, 2374631 Av. Universidad, Curauma 330, Chile;
| | - Monica Pickholz
- Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires and IFIBA, CONICET-UBA, Ciudad Universitaria, Pabellón 1, Buenos Aires 1428, Argentina;
| | - Jean Paul Delgado
- Grupo Genética, Regeneración y Cáncer, Facultad de Ciencias Exactas y Naturales, Instituto de Biología, Universidad de Antioquia, Medellín 050010, Colombia;
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105
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Samgina TY, Tolpina MD, Surin AK, Kovalev SV, Bosch RA, Alonso IP, Garcia FA, Gonzalez Lopez LJ, Lebedev AT. Manual mass spectrometry de novo sequencing of the anionic host defense peptides of the Cuban Treefrog Osteopilus septentrionalis. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2021; 35:e9061. [PMID: 33527491 DOI: 10.1002/rcm.9061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 01/29/2021] [Accepted: 01/30/2021] [Indexed: 06/12/2023]
Abstract
RATIONALE Host defense peptides accumulated in the skin glands of the animals constitute the basis of the adaptive and immune system of amphibians. The peptidome of the Cuban frog Osteopilus septentrionalis was established using tandem mass spectrometry as the best analytical tool to elucidate the sequence of these peptides. METHODS Manual interpretation of complementary collision-induced dissociation (CID), higher energy collision-induced dissociation (HCD), and electron transfer dissociation (ETD) tandem mass spectra recorded with an Orbitrap Elite mass spectrometer in liquid chromatography/mass spectrometry (LC/MS) mode was used to sequence the peptide components of the frog skin secretion, obtained by mild electrostimulation. RESULTS Although the vast majority of amphibian peptides discovered so far are cationic, surprisingly only anionic peptides were identified in the skin secretion of the Cuban frog Osteopilus septentrionalis. Mass spectrometry allowed the sequences to be established of 16 representatives of new peptide families: septenins 1 and septenins 2. The highest sequence coverage when dealing with these anionic peptides was obtained with CID normalized collision energy 35 and HCD normalized collision energy 28. CONCLUSIONS Mirror-symmetrical peptides are sequenced using N-terminal acetylation. Acetylated Ser is reliably distinguished from isomeric Glu by the loss of ketene from b-ions containing the corresponding residue. Calculations of the physicochemical and structural properties of the discovered anionic septenins 1 and 2 allowed the mechanism of their interaction with microbe cells to be postulated.
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Affiliation(s)
- Tatiana Y Samgina
- Chemistry Department, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow, 119991, Russia
| | - Maria D Tolpina
- Chemistry Department, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow, 119991, Russia
| | - Alexey K Surin
- Pushchino Branch, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Prospekt Nauki 6, Pushchino, Moscow, 142290, Russia
| | - Sergey V Kovalev
- Chemistry Department, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow, 119991, Russia
| | - Roberto Alonso Bosch
- Museum of Natural History "Felipe Poey", Faculty of Biology, University of Havana, Havana, Cuba
| | - Isel Pascual Alonso
- Center for Protein Studies, Faculty of Biology, University of Havana, Havana, Cuba
| | | | - Luis Javier Gonzalez Lopez
- Mass Spectrometry Laboratory, Department of Proteomics, Center for Genetic Engineering and Biotechnology, PO Box 6162, Havana, Cuba
| | - Albert T Lebedev
- Chemistry Department, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow, 119991, Russia
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106
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Annaval T, Ramos-Martín F, Herrera-León C, Adélaïde M, Antonietti V, Buchoux S, Sonnet P, Sarazin C, D'Amelio N. Antimicrobial Bombinin-like Peptide 3 Selectively Recognizes and Inserts into Bacterial Biomimetic Bilayers in Multiple Steps. J Med Chem 2021; 64:5185-5197. [PMID: 33851832 DOI: 10.1021/acs.jmedchem.1c00310] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Bombinins are a wide family of antimicrobial peptides from Xenopus skin. By sequence clustering, we highlighted at least three families named A, B, and H, which might exert antibacterial activity by different modes of action. In this work, we study bombinin-like peptide 3 (BLP-3) as a nonhemolytic representative of the quite unexplored class A due to its appealing activity toward WHO-priority-list bacteria such as Neisseria, Pseudomonas aeruginosa, and Staphylococcus aureus. A marked preference for cardiolipin and phosphatidylglycerol head groups, typically found in bacteria, is proven with biomimetic membranes studied by liquid and solid NMR and MD simulations. BLP-3 gets structured upon interaction and penetrates deeply into the bilayer in two steps involving a superficial insertion of key side chains and subsequent internalization. All along the pathway, a fundamental role is played by lysine residues in the conserved region 11-19, which act in synergy with other key residues.
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Affiliation(s)
- Thibault Annaval
- Unité de Génie Enzymatique et Cellulaire UMR 7025 CNRS, Université de Picardie Jules Verne, Amiens 80039, France.,Institut de Biologie Structurale, UMR 5075, Université Grenoble Alpes, CNRS, CEA, Grenoble 38000, France
| | - Francisco Ramos-Martín
- Unité de Génie Enzymatique et Cellulaire UMR 7025 CNRS, Université de Picardie Jules Verne, Amiens 80039, France
| | - Claudia Herrera-León
- Unité de Génie Enzymatique et Cellulaire UMR 7025 CNRS, Université de Picardie Jules Verne, Amiens 80039, France
| | - Morgane Adélaïde
- Unité de Génie Enzymatique et Cellulaire UMR 7025 CNRS, Université de Picardie Jules Verne, Amiens 80039, France
| | - Viviane Antonietti
- Agents Infectieux, Résistance et Chimiothérapie, AGIR UR 4294, Université de Picardie Jules Verne, UFR de Pharmacie, Amiens 80037, France
| | - Sébastien Buchoux
- Unité de Génie Enzymatique et Cellulaire UMR 7025 CNRS, Université de Picardie Jules Verne, Amiens 80039, France
| | - Pascal Sonnet
- Agents Infectieux, Résistance et Chimiothérapie, AGIR UR 4294, Université de Picardie Jules Verne, UFR de Pharmacie, Amiens 80037, France
| | - Catherine Sarazin
- Unité de Génie Enzymatique et Cellulaire UMR 7025 CNRS, Université de Picardie Jules Verne, Amiens 80039, France
| | - Nicola D'Amelio
- Unité de Génie Enzymatique et Cellulaire UMR 7025 CNRS, Université de Picardie Jules Verne, Amiens 80039, France
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107
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Wu Y, Lu D, Jiang Y, Jin J, Liu S, Chen L, Zhang H, Zhou Y, Chen H, Nagle DG, Luan X, Zhang W. Stapled Wasp Venom-Derived Oncolytic Peptides with Side Chains Induce Rapid Membrane Lysis and Prolonged Immune Responses in Melanoma. J Med Chem 2021; 64:5802-5815. [PMID: 33844923 DOI: 10.1021/acs.jmedchem.0c02237] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Peptide stapling chemistry represents an attractive strategy to promote the clinical translation of protein epitope mimetics, but its use has not been applied to natural cytotoxic peptides (NCPs) to produce new oncolytic peptides. Based on a wasp venom peptide, a series of stapled anoplin peptides (StAnos) were prepared. The optimized stapled Ano-3/3s were shown to be protease-resistant and exerted superior tumor cell-selective cytotoxicity by rapid membrane disruption. In addition, Ano-3/3s induced tumor ablation in mice through the direct oncolytic effect and subsequent stimulation of immunogenic cell death. This synergistic oncolytic-immunotherapy effect is more remarkable on melanoma than on triple-negative breast cancer in vivo. The efficacies exerted by Ano-3/3s on melanoma were further characterized by CD8+ T cell infiltration, and the addition of anti-CD8 antibodies diminished the long-term antitumor effects. In summary, these results support stapled peptide chemistry as an advantageous method to enhance the NCP potency for oncolytic therapy.
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Affiliation(s)
- Ye Wu
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Dong Lu
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Yixin Jiang
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Jinmei Jin
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Sanhong Liu
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Lili Chen
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Hong Zhang
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Yudong Zhou
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.,Department of Chemistry and Biochemistry, College of Liberal Arts, University of Mississippi, University, Mississippi 38677-1848, United States
| | - Hongzhuan Chen
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Dale G Nagle
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.,Department of Biomolecular Sciences and Research of Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, Mississippi 38677-1848, United States
| | - Xin Luan
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Weidong Zhang
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.,School of Pharmacy, Second Military Medical University, Shanghai 201203, China
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108
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Animal Venoms-Curse or Cure? Biomedicines 2021; 9:biomedicines9040413. [PMID: 33921205 PMCID: PMC8068803 DOI: 10.3390/biomedicines9040413] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 04/09/2021] [Accepted: 04/09/2021] [Indexed: 12/16/2022] Open
Abstract
An estimated 15% of animals are venomous, with representatives spread across the majority of animal lineages. Animals use venoms for various purposes, such as prey capture and predator deterrence. Humans have always been fascinated by venomous animals in a Janus-faced way. On the one hand, humans have a deeply rooted fear of venomous animals. This is boosted by their largely negative image in public media and the fact that snakes alone cause an annual global death toll in the hundreds of thousands, with even more people being left disabled or disfigured. Consequently, snake envenomation has recently been reclassified by the World Health Organization as a neglected tropical disease. On the other hand, there has been a growth in recent decades in the global scene of enthusiasts keeping venomous snakes, spiders, scorpions, and centipedes in captivity as pets. Recent scientific research has focussed on utilising animal venoms and toxins for the benefit of humanity in the form of molecular research tools, novel diagnostics and therapeutics, biopesticides, or anti-parasitic treatments. Continued research into developing efficient and safe antivenoms and promising discoveries of beneficial effects of animal toxins is further tipping the scales in favour of the “cure” rather than the “curse” prospect of venoms.
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109
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Portillo‐Estrada M, Van Moorleghem C, Janssenswillen S, Cooper RJ, Birkemeyer C, Roelants K, Van Damme R. Proton‐transfer‐reaction time‐of‐flight mass spectrometry (PTR‐TOF‐MS) as a tool for studying animal volatile organic compound (VOC) emissions. Methods Ecol Evol 2021. [DOI: 10.1111/2041-210x.13554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Miguel Portillo‐Estrada
- Research Group Pleco (Plants and Ecosystems) Department of Biology University of Antwerp Wilrijk Belgium
| | - Charlotte Van Moorleghem
- Laboratory for Functional Morphology Department of Biology University of Antwerp Wilrijk Belgium
| | - Sunita Janssenswillen
- Amphibian Evolution Lab Biology Department Vrije Universiteit Brussel Brussels Belgium
| | - Richard Joseph Cooper
- Amphibian Evolution Lab Biology Department Vrije Universiteit Brussel Brussels Belgium
| | | | - Kim Roelants
- Amphibian Evolution Lab Biology Department Vrije Universiteit Brussel Brussels Belgium
| | - Raoul Van Damme
- Laboratory for Functional Morphology Department of Biology University of Antwerp Wilrijk Belgium
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110
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Xiong W, Zhou C, Yin S, Chai J, Zeng B, Wu J, Li Y, Li L, Xu X. Fejerlectin, a Lectin-like Peptide from the Skin of Fejervarya limnocharis, Inhibits HIV-1 Entry by Targeting Gp41. ACS OMEGA 2021; 6:6414-6423. [PMID: 33718732 PMCID: PMC7948434 DOI: 10.1021/acsomega.1c00033] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 02/09/2021] [Indexed: 06/12/2023]
Abstract
Human immunodeficiency virus type 1 (HIV-1) is mainly transmitted by sexual intercourse, and effective microbicides preventing HIV-1 transmission are still required. Amphibian skin is a rich source of defense peptides with antiviral activity. Here, we characterized a lectin-like peptide, fejerlectin (RLCYMVLPCP), isolated from the skin of the frog Fejervarya limnocharis. Fejerlectin showed significant hemagglutination and d-(+)-galacturonic acid-binding activities. Furthermore, fejerlectin suppressed the early entry of HIV-1 into target cells by binding to the N-terminal heptad repeat of HIV-1 gp41 and preventing 6-HB formation and Env-mediated membrane fusion. Fejerlectin is the smallest lectin-like peptide identified to date and represents a new and promising platform for anti-HIV-1 drug development.
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Affiliation(s)
- Weichen Xiong
- Guangdong
Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical
Sciences, Southern Medical University, Shatai Nan Road, No. 1023-1063, Guangzhou 510515, China
| | - Chenliang Zhou
- Guangdong
Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical
Sciences, Southern Medical University, Shatai Nan Road, No. 1023-1063, Guangzhou 510515, China
| | - Shuwen Yin
- Guangdong
Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical
Sciences, Southern Medical University, Shatai Nan Road, No. 1023-1063, Guangzhou 510515, China
- Department
of Pharmacy, Sun Yat-sen University Cancer
Center, State Key Laboratory of Oncology in South China, Collaborative
Innovation Center for Cancer Medicine, Guangzhou 510060, China
| | - Jinwei Chai
- Guangdong
Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical
Sciences, Southern Medical University, Shatai Nan Road, No. 1023-1063, Guangzhou 510515, China
| | - Baishuang Zeng
- Guangdong
Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical
Sciences, Southern Medical University, Shatai Nan Road, No. 1023-1063, Guangzhou 510515, China
| | - Jiena Wu
- Guangdong
Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical
Sciences, Southern Medical University, Shatai Nan Road, No. 1023-1063, Guangzhou 510515, China
| | - Yibin Li
- Guangdong
Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical
Sciences, Southern Medical University, Shatai Nan Road, No. 1023-1063, Guangzhou 510515, China
| | - Lin Li
- Guangdong
Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical
Sciences, Southern Medical University, Shatai Nan Road, No. 1023-1063, Guangzhou 510515, China
| | - Xueqing Xu
- Guangdong
Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical
Sciences, Southern Medical University, Shatai Nan Road, No. 1023-1063, Guangzhou 510515, China
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111
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Wang Y, Ouyang J, Luo X, Zhang M, Jiang Y, Zhang F, Zhou J, Wang Y. Identification and characterization of novel bi-functional cathelicidins from the black-spotted frog (Pelophylax nigromaculata) with both anti-infective and antioxidant activities. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2021; 116:103928. [PMID: 33242568 DOI: 10.1016/j.dci.2020.103928] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 11/12/2020] [Accepted: 11/13/2020] [Indexed: 06/11/2023]
Abstract
Cathelicidins are an important family of antimicrobial peptides (AMPs), which play pivotal roles in vertebrate immune responses against microbial infections. They are regarded as potential drug leads for the development of novel antimicrobial agents and three related drugs have been developed into clinical trials. Thus, it is meaningful to identify more cathelicidins from vertebrate species. Cathelicidins from ranid frogs possess special structural characteristics and activities, but to date only 12 ranid frog cathelicidins have been identified. In the present study, two novel cathelicidins (PN-CATH1 and 2) were identified from the black-spotted frog, Pelophylax nigromaculata. PN-CATHs possess low sequence similarity with the known cathelicidins. They exhibited moderate, but broad-spectrum and rapid antimicrobial activities against the tested bacteria. They kill bacteria by mainly inducing bacterial membrane disruption and possibly generating intracellular ROS formation. They also possess potent anti-biofilm and persister cell killing activity, indicating their potential in combating infections induced by biofilms-forming bacteria. Besides direct antimicrobial activity, they exhibited potent anti-inflammatory activity by effectively inhibiting the LPS-induced production of pro-inflammatory cytokines in mouse macrophages, which could be partly ascribed to their direct LPS-neutralizing ability. Furthermore, PN-CATHs demonstrated powerful in vitro free radical scavenging activities. Ultraviolet radiation significantly increased their in vivo gene expression in frog skin. Meanwhile, they possess weak cytotoxic activity and extremely low hemolytic activity. PN-CATHs represent the first discovery of cathelicidins family AMPs with both potent anti-infective and antioxidant activities. The discovery of PN-CATHs provides potential peptide leads for the development of novel anti-infective and antioxidant drugs.
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Affiliation(s)
- Yan Wang
- Biology Department, Guizhou Normal University, Guiyang, Guizhou, 550000, China
| | - Jianhong Ouyang
- Department of Pharmaceutical Sciences, College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Xuanjin Luo
- Biology Department, Guizhou Normal University, Guiyang, Guizhou, 550000, China
| | - Minghui Zhang
- Department of Pharmaceutical Sciences, College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Yu Jiang
- Biology Department, Guizhou Normal University, Guiyang, Guizhou, 550000, China
| | - Fen Zhang
- Department of Pharmaceutical Sciences, College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Jiang Zhou
- Biology Department, Guizhou Normal University, Guiyang, Guizhou, 550000, China.
| | - Yipeng Wang
- Department of Pharmaceutical Sciences, College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu, 215123, China.
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112
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Yang J, Zhang B, Huang Y, Liu T, Zeng B, Chai J, Wu J, Xu X. Antiviral activity and mechanism of ESC-1GN from skin secretion of hylarana guentheri against influenza a virus. J Biochem 2021; 169:757-765. [PMID: 33624755 DOI: 10.1093/jb/mvab019] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 02/13/2021] [Indexed: 11/13/2022] Open
Abstract
Development of new and effective anti-influenza drugs is critical for prophylaxis and treatment of influenza A virus infection. A wide range of amphibian skin secretions have been identified to show antiviral activity. Our previously reported ESC-1GN, a peptide from the skin secretion of Hylarana guentheri, displayed good antimicrobial and anti-inflammatory effects. Here, we found that ESC-1GN possessed significant antiviral effects against influenza A viruses. Moreover, ESC-1GN could inhibit the entry of divergent H5N1 and H1N1 virus strains with the IC50 values from 1.29 to 4.59 μM. Mechanism studies demonstrated that ESC-1GN disrupted membrane fusion activity of influenza A viruses by interaction with HA2 subunit. The results of site-directed mutant assay and molecular docking revealed that E105, N50 and the residues around them on HA2 subunit could form hydrogen bonds with amino acid on ESC-1GN, which were critical for ESC-1GN binding to HA2 and inhibiting the entry of influenza A viruses. Altogether, these not only suggest that ESC-1GN maybe represent a new type of excellent template designing drugs against influenza A viruses, but also it may shed light on the immune mechanism and survival strategy of H. guentheri against viral pathogens.
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Affiliation(s)
- Jie Yang
- Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Bei Zhang
- Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Yingna Huang
- Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Teng Liu
- Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Baishuang Zeng
- Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Jingwei Chai
- Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Jiena Wu
- Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Xueqing Xu
- Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, China
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113
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Musale V, Moffett RC, Conlon JM, Flatt PR, Abdel-Wahab YH. Beneficial actions of the [A14K] analog of the frog skin peptide PGLa-AM1 in mice with obesity and degenerative diabetes: A mechanistic study. Peptides 2021; 136:170472. [PMID: 33338546 DOI: 10.1016/j.peptides.2020.170472] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 12/01/2020] [Accepted: 12/02/2020] [Indexed: 12/15/2022]
Abstract
The antidiabetic actions of [A14K]PGLa-AM1, an analog of peptide glycine-leucine-amide-AM1 isolated from skin secretions of the octoploid frog Xenopus amieti, were investigated in genetically diabetic-obese db/db mice. Twice daily administration of [A14K]PGLa-AM1 (75 nmol/kg body weight) for 28 days significantly (P < 0.05) decreased circulating blood glucose and HbA1c and increased plasma insulin concentrations leading to improvements in glucose tolerance. The elevated levels of triglycerides, LDL and cholesterol associated with the db/db phenotype were significantly reduced by peptide administration. Elevated plasma alanine transaminase, aspartic acid transaminase, and alkaline phosphatase activities and creatinine concentrations were also significantly decreased. Peptide treatment increased pancreatic insulin content and improved the responses of isolated islets to established insulin secretagogues. No significant changes in islet β-cell and α-cell areas were observed in [A14K]PGLa-AM1 treated mice but the loss of large and medium-size islets was prevented. Peptide administration resulted in a significant (P < 0.01) increase in islet expression of the gene encoding Pdx-1, a major transcription factor in islet cells determining β-cell survival and function, resulting in increased expression of genes involved with insulin secretion (Abcc8, Kcnj11, Slc2a2, Cacn1c) together with the genes encoding the incretin receptors Glp1r and Gipr. In addition, the elevated expression of insulin signalling genes (Slc2a4, Insr, Irs1, Akt1, Pik3ca, Ppm1b) in skeletal muscle associated with the db/db phenotype was downregulated by peptide treatment These data suggest that the anti-diabetic properties of [A14K]PGLa-AM1 are mediated by molecular changes that enhance both the secretion and action of insulin.
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Affiliation(s)
- Vishal Musale
- Diabetes Research Group, School of Biomedical Sciences, Ulster University, Cromore Road, Coleraine, Northern Ireland, BT52 1SA, UK
| | - R Charlotte Moffett
- Diabetes Research Group, School of Biomedical Sciences, Ulster University, Cromore Road, Coleraine, Northern Ireland, BT52 1SA, UK
| | - J Michael Conlon
- Diabetes Research Group, School of Biomedical Sciences, Ulster University, Cromore Road, Coleraine, Northern Ireland, BT52 1SA, UK.
| | - Peter R Flatt
- Diabetes Research Group, School of Biomedical Sciences, Ulster University, Cromore Road, Coleraine, Northern Ireland, BT52 1SA, UK
| | - Yasser H Abdel-Wahab
- Diabetes Research Group, School of Biomedical Sciences, Ulster University, Cromore Road, Coleraine, Northern Ireland, BT52 1SA, UK
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Portelinha J, Duay SS, Yu SI, Heilemann K, Libardo MDJ, Juliano SA, Klassen JL, Angeles-Boza AM. Antimicrobial Peptides and Copper(II) Ions: Novel Therapeutic Opportunities. Chem Rev 2021; 121:2648-2712. [PMID: 33524257 DOI: 10.1021/acs.chemrev.0c00921] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The emergence of new pathogens and multidrug resistant bacteria is an important public health issue that requires the development of novel classes of antibiotics. Antimicrobial peptides (AMPs) are a promising platform with great potential for the identification of new lead compounds that can combat the aforementioned pathogens due to their broad-spectrum antimicrobial activity and relatively low rate of resistance emergence. AMPs of multicellular organisms made their debut four decades ago thanks to ingenious researchers who asked simple questions about the resistance to bacterial infections of insects. Questions such as "Do fruit flies ever get sick?", combined with pioneering studies, have led to an understanding of AMPs as universal weapons of the immune system. This review focuses on a subclass of AMPs that feature a metal binding motif known as the amino terminal copper and nickel (ATCUN) motif. One of the metal-based strategies of hosts facing a pathogen, it includes wielding the inherent toxicity of copper and deliberately trafficking this metal ion into sites of infection. The sudden increase in the concentration of copper ions in the presence of ATCUN-containing AMPs (ATCUN-AMPs) likely results in a synergistic interaction. Herein, we examine common structural features in ATCUN-AMPs that exist across species, and we highlight unique features that deserve additional attention. We also present the current state of knowledge about the molecular mechanisms behind their antimicrobial activity and the methods available to study this promising class of AMPs.
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Affiliation(s)
- Jasmin Portelinha
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Searle S Duay
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States.,Chemistry Department, Adamson University, 900 San Marcelino Street, Ermita, Manila 1000, Philippines
| | - Seung I Yu
- Department of Molecular and Cell Biology, University of Connecticut, 91 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Kara Heilemann
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - M Daben J Libardo
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Samuel A Juliano
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Jonathan L Klassen
- Department of Molecular and Cell Biology, University of Connecticut, 91 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Alfredo M Angeles-Boza
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States.,Institute of Material Science, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
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115
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Zvejniece L, Dambrova M, Smits G. Total synthesis and in vivo evaluation of 8-deoxypumiliotoxin 193H. Nat Prod Res 2021; 35:440-446. [PMID: 31264906 DOI: 10.1080/14786419.2019.1636244] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 06/18/2019] [Accepted: 06/22/2019] [Indexed: 12/12/2022]
Abstract
The total synthesis of both the double bond isomers of indolizine alkaloid 8-deoxypumiliotoxin 193H has been accomplished. Both the double bond isomers Z-4 and E-4 induced convulsions and inhibited neuro-muscular activity at a dose of 25 mg/kg after intraperitoneal injection in mice. The lethal dose of Z-4 and E-4 was 100 mg/kg, indicating that 8-deoxypumiliotoxin 193H is 10-times less toxic than the known pumiliotoxin (+)-251 D.
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Affiliation(s)
| | | | - Gints Smits
- Latvian Institute of Organic Synthesis, Riga, Latvia
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116
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Alexandre LS, Braga FMS, de Oliveira PK, Coelho TLS, Fonseca MG, de Sousa RWR, Dittz D, de Castro E Sousa JM, Ferreira PMP, Dantas C, Barbosa HDS, Chaves MH, Lopes Júnior CA, Vieira Júnior GM. Proteins from Rhinella jimi parotoid gland secretion: A comprehensive analytical approach. Toxicon 2021; 192:32-39. [PMID: 33465357 DOI: 10.1016/j.toxicon.2021.01.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 12/28/2020] [Accepted: 01/10/2021] [Indexed: 10/22/2022]
Abstract
Toad skin secretions are sources of complex mixtures of bioactive compounds, such as proteins and peptides. Rhinella jimi species is a common toad in the Brazilian northeast, considered by only a few known studies. The experimental design was applied to optimize the protein extraction method from R. jimi parotoid gland secretions. The optimum condition was using 100 mmol L-1 Tris-HCl buffer pH 7.2 under vortexing for 5 min. The FTIR analysis combined with PCA revealed high-protein purity of the extracts, confirming the success of the proposed extraction method. The total protein concentration by the Bradford method was 102.4 and 66.5 mg g-1 on toad poisons from Teresina and Picos, respectively. The comparative proteomic analysis using HPLC-SEC-DAD and 1D SDS-PAGE revealed significant differences in protein abundance. HMW biomolecules showed greater abundance in toads from Teresina, while LMW protein species were more abundant in toads from Picos. The significant difference in amphibian proteome can be attributed to the edaphoclimatic conditions of their habitat. The cytotoxicity of the protein extract from Teresina was higher on the tumor cell lines 4T1 and CT26.WT. These new findings are fundamental for future studies the on identity and biological activity of biomolecules from this noble sample.
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Affiliation(s)
- Leonardo Santos Alexandre
- Laboratório de Produtos Naturais - LPN, Department of Chemistry, Federal University of Piauí, 64049-550, Teresina, Piauí, Brazil
| | - Francislene Machado Silva Braga
- Grupo de Estudos em Bioanalítica - GEBIO, Department of Chemistry, Federal University of Piauí, 64049-550, Teresina, Piauí, Brazil
| | - Patrícia Kelly de Oliveira
- Grupo de Estudos em Bioanalítica - GEBIO, Department of Chemistry, Federal University of Piauí, 64049-550, Teresina, Piauí, Brazil
| | - Tiago Linus Silva Coelho
- Grupo de Estudos em Bioanalítica - GEBIO, Department of Chemistry, Federal University of Piauí, 64049-550, Teresina, Piauí, Brazil
| | - Mariluce Gonçalves Fonseca
- Federal University of Piauí, Department of Biology, Campus Senador Helvídio Nunes de Barros, Picos, Piauí, Brazil
| | - Rayran Walter Ramos de Sousa
- Laboratory of Experimental Cancerology, Department of Biophysics and Physiology, Federal University of Piauí, 64049-550, Teresina, Piauí, Brazil
| | - Dalton Dittz
- Federal University of Piauí, Department of Biochemistry and Pharmacology, Teresina, Piauí, Brazil
| | - João Marcelo de Castro E Sousa
- Laboratory of Experimental Cancerology, Department of Biophysics and Physiology, Federal University of Piauí, 64049-550, Teresina, Piauí, Brazil
| | - Paulo Michel Pinheiro Ferreira
- Laboratory of Experimental Cancerology, Department of Biophysics and Physiology, Federal University of Piauí, 64049-550, Teresina, Piauí, Brazil
| | - Clecio Dantas
- Laboratório de Química Computacional Inorgânica e Quimiometria - LQCINMETRIA, State University of Maranhão - UEMA, Campus Caxias, 65604-380, Caxias, MA, Brazil
| | - Herbert de Sousa Barbosa
- Grupo de Estudos em Bioanalítica - GEBIO, Department of Chemistry, Federal University of Piauí, 64049-550, Teresina, Piauí, Brazil
| | - Mariana Helena Chaves
- Laboratório de Produtos Naturais - LPN, Department of Chemistry, Federal University of Piauí, 64049-550, Teresina, Piauí, Brazil
| | - Cícero Alves Lopes Júnior
- Grupo de Estudos em Bioanalítica - GEBIO, Department of Chemistry, Federal University of Piauí, 64049-550, Teresina, Piauí, Brazil.
| | - Gerardo Magela Vieira Júnior
- Laboratório de Produtos Naturais - LPN, Department of Chemistry, Federal University of Piauí, 64049-550, Teresina, Piauí, Brazil.
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117
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Sekar PC, Paul DM, Srinivasan E, Rajasekaran R. Unravelling the molecular effect of ocellatin-1, F1, K1 and S1, the frog-skin antimicrobial peptides to enhance its therapeutics-quantum and molecular mechanical approaches. J Mol Model 2021; 27:10. [PMID: 33392722 DOI: 10.1007/s00894-020-04652-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 12/16/2020] [Indexed: 01/09/2023]
Abstract
Ocellatin AMPs (antimicrobial peptides) are considered to be promising alternative therapeutics to conventional antibiotics. Three-dimensional (3D) structures of ocellatin-F1 with 25 residues have been reported to be potent in terms of bacterial membrane permeability. To investigate the influence of similar ocellatin peptides with 25 residues pertaining to antimicrobial effect, ocellatin-1, K1 and S1 peptides were modelled with ocellatin-F1 as template. Comparative analyses between these peptides were carried out, using computational approaches. From the results of in silico toxicity profile, all peptides were found to be non-toxic with no haemolytic activity. Further sequence analysis, net charge, hydrophobicity and hydrophobic moment revealed the membrane permeable efficacy of ocellatin-1 peptide. Besides, the investigation of peptide electronic structures through density functional theory and quantum chemical (HOMO and LUMO) calculations predicted ocellatin-1 to be a suitable peptide, which can be used as a scaffold for therapeutics. Furthermore, the determination of structural contours such as RMSD, RMSF and Rg through trajectory analysis revealed that ocellatin-1 exhibited strong structural stability. In addition, the trajectory analysis of elements of secondary structure illustrated the alpha helical conformations to be retained in all peptides, except ocellatin-1. On the aforementioned grounds, ocellatin-1 was found to possess the important role of peptide penetration of the bacterial membrane. This study becomes significant, since it is the first time where the structural importance of ocellatin peptides were explored in detail and the therapeutic potential of ocellatin-1 as a peptide-based antimicrobial drug have been theoretically revealed.
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Affiliation(s)
- P Chandra Sekar
- Bioinformatics Lab, Department of Biotechnology, School of BioSciences and Technology, Vellore Institute of Technology (Deemed to be University), Vellore, Tamil Nadu, India
| | - D Meshach Paul
- Bioinformatics Lab, Department of Biotechnology, School of BioSciences and Technology, Vellore Institute of Technology (Deemed to be University), Vellore, Tamil Nadu, India
| | - E Srinivasan
- Bioinformatics Lab, Department of Biotechnology, School of BioSciences and Technology, Vellore Institute of Technology (Deemed to be University), Vellore, Tamil Nadu, India
| | - R Rajasekaran
- Bioinformatics Lab, Department of Biotechnology, School of BioSciences and Technology, Vellore Institute of Technology (Deemed to be University), Vellore, Tamil Nadu, India.
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118
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Ong D, Ismail MN, Shahrudin S. Protein Composition and Biomedical Potential of the Skin Secretion of Hylarana erythraea (Schlegel, 1837) (Anura: Ranidae) from Langkawi Archipelago, Kedah, Peninsular Malaysia. Int J Pept Res Ther 2021; 27:2125-2133. [PMID: 34177403 PMCID: PMC8215483 DOI: 10.1007/s10989-021-10240-w] [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: 03/31/2021] [Accepted: 06/13/2021] [Indexed: 02/06/2023]
Abstract
The skin secretion of amphibians is known for its high content of bioactive compounds. These bioactive compounds are essential for the advancement of biomedical industries. Four wild green paddy frogs, Hylarana erythraea, were collected from various habitat types within the Langkawi Archipelago. These frogs' skin secretions were collected, extracted, and analysed for their protein compounds together with biomedical potentials using liquid chromatography-mass spectrometry (LC-MS). The total protein concentration of H. erythraea skin secretions was determined as 0.269 mg/mL. Based on the UniProt (Anura) database, we identified 29 proteins. These proteins were categorised as antimicrobial (AMP) (38%), followed by hormone (17%), enzyme (17%), unreviewed proteins (17%), structural proteins (7%), and regulatory proteins (4%). The AMPs identified were from the family of esculentin-1, esculentin-2, brevinin-1, and frenatin-4, while the hormones belonged to the cholecystokinin group. The enzymes detected were adenylate cyclase 9, the suppressor of tumorigenicity 14 protein homolog, and the HGF activator. The structural proteins belonged to toe pad keratin 2 and Krt5.7 proteins, while the single regulatory protein is CCR4-NOT transcription complex subunit 6-like. These proteins have a wide range of biomedical importance, such as wound healings, facilitate digestions, anti-tumours, and anti-cancer effect.
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Affiliation(s)
- Dasi Ong
- School of Pharmaceutical Sciences, Universiti Sains Malaysia (USM), 11800 Gelugor, Penang Malaysia ,Analytical Biochemistry Research Centre, Universiti Sains Malaysia (USM), 11800 Gelugor, Penang Malaysia
| | - Mohd Nazri Ismail
- Analytical Biochemistry Research Centre, Universiti Sains Malaysia (USM), 11800 Gelugor, Penang Malaysia
| | - Shahriza Shahrudin
- School of Pharmaceutical Sciences, Universiti Sains Malaysia (USM), 11800 Gelugor, Penang Malaysia
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119
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Carta P, Conlon JM, Scorciapino MA. Conformational change following conversion of inactive rhinophrynin-33 to bioactive rhinophrynin-27 in the skin of the frog Rhinophrynus dorsalis. Biochimie 2020; 181:162-168. [PMID: 33359559 DOI: 10.1016/j.biochi.2020.12.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 11/17/2020] [Accepted: 12/15/2020] [Indexed: 10/22/2022]
Abstract
Skin secretions of the Mexican burrowing toad Rhinophrynus dorsalis (Rhinophrynidae) contain the proline-arginine-rich peptide, rhinophrynin-27 (RP-27; ELRLPEIARPVPEVLPARLPLPALPRN) with insulinotropic and immunomodulatory properties, together with a higher concentration of the biologically inactive form, rhinophrynin-33 (RP-33) that constitutes RP-27 extended from its C-terminus by the hexapeptide KMAKNQ. Determination of the conformation of RP-33 by NMR demonstrates that in both water and in a solvent that promotes protein folding (50% trifluoroethanol-water), the majority of the proline residues are found in a polyproline type II helical region. The peptide adopts a horseshoe (U-shaped) conformation with pronounced bends in the molecule of around 100°-120° at Glu13 and Arg18. The hexapeptide extension adopts a α-helical conformation. When the hexapeptide is excised to generate RP-27, the molecule adopts an L-shaped conformation with a single bend at Glu13. A search of protein sequence databases indicated the P-X-P-XXX-P-XXX-P-X-P motif found in RP-27 and RP-33 occurs in a number of proteins although its functional implications are unclear. The data suggest that RP-33 represents a biosynthetic precursor of RP-27 that is activated by a protease cleaving at a single lysine residue of the type previously identified in Xenopus laevis skin secretions.
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Affiliation(s)
- Paola Carta
- Department of Chemical and Geological Sciences, University of Cagliari, Cagliari, Italy
| | - J Michael Conlon
- Diabetes Research Group, School of Biomedical Sciences, Ulster University, Coleraine, N. Ireland, UK
| | - M Andrea Scorciapino
- Department of Chemical and Geological Sciences, University of Cagliari, Cagliari, Italy.
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120
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Gao Y, Li R, Yang W, Zhou M, Wang L, Ma C, Xi X, Chen T, Shaw C, Wu D. Identification of a new myotropic decapeptide from the skin secretion of the red-eyed leaf frog, Agalychnis callidryas. PLoS One 2020; 15:e0243326. [PMID: 33270804 PMCID: PMC7714090 DOI: 10.1371/journal.pone.0243326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 11/18/2020] [Indexed: 12/03/2022] Open
Abstract
Bradykinin-related peptides (BRPs) family is one of the most significant myotropic peptide families derived from frog skin secretions. Here, a novel BRP callitide was isolated and identified from the red-eyed leaf frog, Agalychnis callidryas, with atypical primary structure FRPAILVRPK-NH2. The mature peptide was cleaved N-terminally at a classic propeptide convertase cleavage site (-KR-) and at the C-terminus an unusual -GKGKGK sequence was removed using the first G residue as an amide donor for the C-terminally-located K residue. Thereafter, the synthetic replicates of callitide were assessed the myotropic activity and showed a significant contraction of balder, with the 0.63 nM EC50 value, more potent than most discovered myotropic peptides. The binding mode was further speculated by molecular docking and stimulation. The result indicated that the C-terminal of callitide might selectively bind to bradykinin receptor B2 (BKRB2). Further investigation of the callitide needs to be done in the future to be exploited as potential future drug leads.
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Affiliation(s)
- Yitian Gao
- College of Life and Environmental Science, Wenzhou University, Wenzhou, Zhejiang, China
- Natural Drug Discovery Group, School of Pharmacy, Queen's University Belfast, Belfast, Northern Ireland, United Kingdom
| | - Renjie Li
- Natural Drug Discovery Group, School of Pharmacy, Queen's University Belfast, Belfast, Northern Ireland, United Kingdom
| | - Wenqing Yang
- College of Life and Environmental Science, Wenzhou University, Wenzhou, Zhejiang, China
| | - Mei Zhou
- Natural Drug Discovery Group, School of Pharmacy, Queen's University Belfast, Belfast, Northern Ireland, United Kingdom
| | - Lei Wang
- Natural Drug Discovery Group, School of Pharmacy, Queen's University Belfast, Belfast, Northern Ireland, United Kingdom
| | - Chengbang Ma
- Natural Drug Discovery Group, School of Pharmacy, Queen's University Belfast, Belfast, Northern Ireland, United Kingdom
| | - Xinping Xi
- Natural Drug Discovery Group, School of Pharmacy, Queen's University Belfast, Belfast, Northern Ireland, United Kingdom
| | - Tianbao Chen
- Natural Drug Discovery Group, School of Pharmacy, Queen's University Belfast, Belfast, Northern Ireland, United Kingdom
| | - Chris Shaw
- Natural Drug Discovery Group, School of Pharmacy, Queen's University Belfast, Belfast, Northern Ireland, United Kingdom
| | - Di Wu
- Chemical Biology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
- * E-mail:
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Rodriguez C, Ibáñez R, Rollins-Smith LA, Gutiérrez M, Durant-Archibold AA. Antimicrobial Secretions of Toads (Anura, Bufonidae): Bioactive Extracts and Isolated Compounds against Human Pathogens. Antibiotics (Basel) 2020; 9:antibiotics9120843. [PMID: 33255881 PMCID: PMC7761505 DOI: 10.3390/antibiotics9120843] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 11/20/2020] [Accepted: 11/23/2020] [Indexed: 11/20/2022] Open
Abstract
Species of the family Bufonidae, better known as true toads, are widespread and produce bioactive substances in the secretions obtained from specialized skin macroglands. Some true toads have been employed as a folk remedy to treat infectious diseases caused by microbial pathogens. Recent publications based on in silico analysis highlighted the Bufonidae as promising sources of antimicrobial peptides. A review of the literature reveals that Bufonidae skin secretion extracts show inhibitory activity in vitro against clinical isolates of bacteria, resistant and standard strains of bacterial, and fungal and parasitic human pathogens. Secondary metabolites belonging to the classes of alkaloids, bufadienolides, and peptides with antimicrobial activity have been isolated from species of the genera Bufo, Bufotes, Duttaphrynus, and Rhinella. Additionally, some antimicrobial extracts and purified compounds display low cytotoxicity against mammal cells.
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Affiliation(s)
- Candelario Rodriguez
- Centro de Biodiversidad y Descubrimiento de Drogas, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología (INDICASAT AIP), Clayton, Panama City 0843-01103, Panama;
- Departamento de Bioquímica, Facultad de Ciencias Naturales, Exactas y Tecnología, Universidad de Panamá, Apartado 0824-03366, Panama
- Department of Biotechnology, Acharya Nagarjuna University, Nagarjuna Nagar, Guntur 522510, India
- Scientific Station COIBA, (COIBA AIP), Ciudad del Saber, Apartado 0816-02852, Panama
| | - Roberto Ibáñez
- Smithsonian Tropical Research Institute (STRI), Balboa 0843-03092, Panama;
- Departamento de Zoología, Facultad de Ciencias Naturales, Exactas y Tecnología, Universidad de Panamá, Apartado 0824-03366, Panama
| | - Louise A. Rollins-Smith
- Department of Pathology, Microbiology, and Immunology, and Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, TN 37232, USA;
| | - Marcelino Gutiérrez
- Centro de Biodiversidad y Descubrimiento de Drogas, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología (INDICASAT AIP), Clayton, Panama City 0843-01103, Panama;
- Correspondence: (M.G.); (A.A.D.-A.)
| | - Armando A. Durant-Archibold
- Centro de Biodiversidad y Descubrimiento de Drogas, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología (INDICASAT AIP), Clayton, Panama City 0843-01103, Panama;
- Departamento de Bioquímica, Facultad de Ciencias Naturales, Exactas y Tecnología, Universidad de Panamá, Apartado 0824-03366, Panama
- Correspondence: (M.G.); (A.A.D.-A.)
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Liscano Y, Oñate-Garzón J, Ocampo-Ibáñez ID. In Silico Discovery of Antimicrobial Peptides as an Alternative to Control SARS-CoV-2. Molecules 2020; 25:E5535. [PMID: 33255849 PMCID: PMC7728342 DOI: 10.3390/molecules25235535] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 11/10/2020] [Accepted: 11/20/2020] [Indexed: 12/16/2022] Open
Abstract
A serious pandemic has been caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The interaction between spike surface viral protein (Sgp) and the angiotensin-converting enzyme 2 (ACE2) cellular receptor is essential to understand the SARS-CoV-2 infectivity and pathogenicity. Currently, no drugs are available to treat the infection caused by this coronavirus and the use of antimicrobial peptides (AMPs) may be a promising alternative therapeutic strategy to control SARS-CoV-2. In this study, we investigated the in silico interaction of AMPs with viral structural proteins and host cell receptors. We screened the antimicrobial peptide database (APD3) and selected 15 peptides based on their physicochemical and antiviral properties. The interactions of AMPs with Sgp and ACE2 were performed by docking analysis. The results revealed that two amphibian AMPs, caerin 1.6 and caerin 1.10, had the highest affinity for Sgp proteins while interaction with the ACE2 receptor was reduced. The effective AMPs interacted particularly with Arg995 located in the S2 subunits of Sgp, which is key subunit that plays an essential role in viral fusion and entry into the host cell through ACE2. Given these computational findings, new potentially effective AMPs with antiviral properties for SARS-CoV-2 were identified, but they need experimental validation for their therapeutic effectiveness.
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Affiliation(s)
- Yamil Liscano
- Research Group of Chemical and Biotechnology, Faculty of Basic Sciences, Universidad Santiago de Cali, Cali 760035, Colombia;
| | - Jose Oñate-Garzón
- Research Group of Chemical and Biotechnology, Faculty of Basic Sciences, Universidad Santiago de Cali, Cali 760035, Colombia;
| | - Iván Darío Ocampo-Ibáñez
- Research Group of Microbiology, Industry and Environment, Faculty of Basic Sciences, Universidad Santiago de Cali, Cali 760035, Colombia
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Han Z, Lian C, Ma Y, Zhang C, Liu Z, Tu Y, Ma Y, Gu Y. A frog-derived bionic peptide with discriminative inhibition of tumors based on integrin αvβ3 identification. Biomater Sci 2020; 8:5920-5930. [PMID: 32959810 DOI: 10.1039/d0bm01187h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aureins, natural active peptides extracted from skin secretions of Australian bell frogs, have become a research focus due to the antitumor effects caused by lysing cell membranes. However, clinical translation of Aureins is still limited by non-selective toxicity between normal and cancer cells. Herein, by structure-activity relationship analysis and rational linker design, a dual-function fusion peptide RA3 is designed by tactically fusing Aurein peptide A1 with strong anticancer activity, with a tri-peptide with integrin αvβ3-binding ability which was screened in our previous work. Rational design and selection of fusion linkers ensures α-helical conformation and active functions of this novel fusion peptide, inducing effective membrane rupture and selective apoptosis of cancer cells. The integrin binding and tumor recognition ability of the fusion peptide is further validated by fluorescence imaging in cell and mouse models, in comparison with the non-selective A1 peptide. Meanwhile, increased stability and superior therapeutic efficacy are achieved in vivo for the RA3 fusion peptide. Our study highlights that aided by computational simulation technologies, the biomimetic fusion RA3 peptide has been successfully designed, surmounting the poor tumor-selectivity of the natural defensive peptide, serving as a promising therapeutic agent for cancer treatment.
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Affiliation(s)
- Zhihao Han
- State Key Laboratory of Natural Medicines, Department of Biomedicine Engineering, School of Engineering, China Pharmaceutical University, Nanjing, No. 24 Tongjia Lane, 210009, China.
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Aguilera-Mendoza L, Marrero-Ponce Y, García-Jacas CR, Chavez E, Beltran JA, Guillen-Ramirez HA, Brizuela CA. Automatic construction of molecular similarity networks for visual graph mining in chemical space of bioactive peptides: an unsupervised learning approach. Sci Rep 2020; 10:18074. [PMID: 33093586 PMCID: PMC7583304 DOI: 10.1038/s41598-020-75029-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Accepted: 09/23/2020] [Indexed: 12/15/2022] Open
Abstract
The increasing interest in bioactive peptides with therapeutic potentials has been reflected in a large variety of biological databases published over the last years. However, the knowledge discovery process from these heterogeneous data sources is a nontrivial task, becoming the essence of our research endeavor. Therefore, we devise a unified data model based on molecular similarity networks for representing a chemical reference space of bioactive peptides, having an implicit knowledge that is currently not explicitly accessed in existing biological databases. Indeed, our main contribution is a novel workflow for the automatic construction of such similarity networks, enabling visual graph mining techniques to uncover new insights from the "ocean" of known bioactive peptides. The workflow presented here relies on the following sequential steps: (i) calculation of molecular descriptors by applying statistical and aggregation operators on amino acid property vectors; (ii) a two-stage unsupervised feature selection method to identify an optimized subset of descriptors using the concepts of entropy and mutual information; (iii) generation of sparse networks where nodes represent bioactive peptides, and edges between two nodes denote their pairwise similarity/distance relationships in the defined descriptor space; and (iv) exploratory analysis using visual inspection in combination with clustering and network science techniques. For practical purposes, the proposed workflow has been implemented in our visual analytics software tool ( http://mobiosd-hub.com/starpep/ ), to assist researchers in extracting useful information from an integrated collection of 45120 bioactive peptides, which is one of the largest and most diverse data in its field. Finally, we illustrate the applicability of the proposed workflow for discovering central nodes in molecular similarity networks that may represent a biologically relevant chemical space known to date.
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Affiliation(s)
- Longendri Aguilera-Mendoza
- Departamento de Ciencias de la Computación, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Baja California, 22860, Mexico
| | - Yovani Marrero-Ponce
- Universidad San Francisco de Quito, Grupo de Medicina Molecular y Traslacional (MeM&T), Escuela de Medicina, Colegio de Ciencias de la Salud (COCSA), Av. Interoceánica Km 12 1/2 y Av. Florencia, 17-1200-841, Quito, Ecuador.
- Grupo GINUMED, Corporacion Universitaria Rafael Nuñez. Facultad de Salud, Programa de Medicina, Cartagena, Colombia.
- Unidad de Investigación de Diseño de Fármacos y Conectividad Molecular, Departamento de Química Física, Facultad de Farmacia, Universitat de València, Valencia, Spain.
| | - César R García-Jacas
- Cátedras Conacyt - Departamento de Ciencias de la Computación, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Ensenada, Baja California, Mexico
| | - Edgar Chavez
- Departamento de Ciencias de la Computación, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Baja California, 22860, Mexico
| | - Jesus A Beltran
- Department of Informatics, University of California, Irvine, Irvine, CA, USA
| | - Hugo A Guillen-Ramirez
- Department of BioMedical Research (DBMR), University of Bern, Bern, 3008, Switzerland
- Department of Medical Oncology, Inselspital, University Hospital and University of Bern, 3010, Bern, Switzerland
| | - Carlos A Brizuela
- Departamento de Ciencias de la Computación, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Baja California, 22860, Mexico.
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125
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Barran G, Kolodziejek J, Coquet L, Leprince J, Jouenne T, Nowotny N, Conlon JM, Mechkarska M. Peptidomic Analysis of Skin Secretions of the Caribbean Frogs Leptodactylus insularum and Leptodactylus nesiotus (Leptodactylidae) Identifies an Ocellatin with Broad Spectrum Antimicrobial Activity. Antibiotics (Basel) 2020; 9:antibiotics9100718. [PMID: 33092132 PMCID: PMC7588904 DOI: 10.3390/antibiotics9100718] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 09/27/2020] [Accepted: 10/19/2020] [Indexed: 11/23/2022] Open
Abstract
Ocellatins are peptides produced in the skins of frogs belonging to the genus Leptodactylus that generally display weak antimicrobial activity against Gram-negative bacteria only. Peptidomic analysis of norepinephrine-stimulated skin secretions from Leptodactylus insularum Barbour 1906 and Leptodactylus nesiotus Heyer 1994, collected in the Icacos Peninsula, Trinidad, led to the purification and structural characterization of five ocellatin-related peptides from L. insularum (ocellatin-1I together with its (1–16) fragment, ocellatin-2I and its (1–16) fragment, and ocellatin-3I) and four ocellatins from L. nesiotus (ocellatin-1N, -2N, -3N, and -4N). While ocellatins-1I, -2I, and -1N showed a typically low antimicrobial potency against Gram-negative bacteria, ocellatin-3N (GIFDVLKNLAKGVITSLAS.NH2) was active against an antibiotic-resistant strain of Klebsiella pneumoniae and reference strains of Escherichia coli, K. pneumoniae, Pseudomonas aeruginosa, and Salmonella typhimurium (minimum inhibitory concentrations (MICs) in the range 31.25–62.5 μM), and was the only peptide active against Gram-positive Staphylococcus aureus (MIC = 31.25 μM) and Enterococcus faecium (MIC = 62.5 μM). The therapeutic potential of ocellatin-3N is limited by its moderate hemolytic activity (LC50 = 98 μM) against mouse erythrocytes. The peptide represents a template for the design of long-acting, non-toxic, and broad-spectrum antimicrobial agents for targeting multidrug-resistant pathogens.
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Affiliation(s)
- Gervonne Barran
- Department of Life Sciences, Faculty of Science and Technology, The University of The West Indies, St. Augustine Campus, Trinidad and Tobago;
| | - Jolanta Kolodziejek
- Viral Zoonoses, Emerging and Vector-Borne Infections Group, Department of Pathobiology, Institute of Virology, University of Veterinary Medicine, Veterinärplatz 1, A-1210 Vienna, Austria; (J.K.); (N.N.)
| | - Laurent Coquet
- CNRS UMR 6270, PISSARO, Institute for Research and Innovation in Biomedicine (IRIB), Normandy University, 76000 Rouen, France; (L.C.); (T.J.)
| | - Jérôme Leprince
- Inserm U1239, PRIMACEN, Institute for Research and Innovation in Biomedicine (IRIB), Normandy University, 76000 Rouen, France;
| | - Thierry Jouenne
- CNRS UMR 6270, PISSARO, Institute for Research and Innovation in Biomedicine (IRIB), Normandy University, 76000 Rouen, France; (L.C.); (T.J.)
| | - Norbert Nowotny
- Viral Zoonoses, Emerging and Vector-Borne Infections Group, Department of Pathobiology, Institute of Virology, University of Veterinary Medicine, Veterinärplatz 1, A-1210 Vienna, Austria; (J.K.); (N.N.)
- Department of Basic Medical Sciences, College of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai Helathcare City, P.O. Box 505055, Dubai, UAE
| | - J. Michael Conlon
- Diabetes Research Group, School of Biomedical Sciences, University of Ulster, Coleraine BT52 1SA, Northern Ireland, UK
- Correspondence: (J.M.C.); (M.M.)
| | - Milena Mechkarska
- Department of Life Sciences, Faculty of Science and Technology, The University of The West Indies, St. Augustine Campus, Trinidad and Tobago;
- Correspondence: (J.M.C.); (M.M.)
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126
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Figainin 1, a Novel Amphibian Skin Peptide with Antimicrobial and Antiproliferative Properties. Antibiotics (Basel) 2020; 9:antibiotics9090625. [PMID: 32967114 PMCID: PMC7559428 DOI: 10.3390/antibiotics9090625] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 08/17/2020] [Accepted: 08/19/2020] [Indexed: 01/10/2023] Open
Abstract
Amphibian skin secretions are abundant in bioactive compounds, especially antimicrobial peptides. These molecules are generally cationic and rich in hydrophobic amino acids, have an amphipathic structure and adopt an α-helical conformation when in contact with microorganisms membranes. In this work, we purified and characterized Figainin 1, a novel antimicrobial and antiproliferative peptide from the cutaneous secretion of the frog Boana raniceps. Figainin 1 is a cationic peptide with eighteen amino acid residues—rich in leucine and isoleucine, with an amidated C-terminus—and adopts an α-helical conformation in the presence of trifluoroethanol (TFE). It displayed activity against Gram-negative and especially Gram-positive bacteria, with MIC values ranging from 2 to 16 µM, and showed an IC50 value of 15.9 µM against epimastigote forms of T. cruzi; however, Figanin 1 did not show activity against Candida species. This peptide also showed cytolytic effects against human erythrocytes with an HC50 of 10 µM, in addition to antiproliferative activity against cancer cells and murine fibroblasts, with IC50 values ranging from 10.5 to 13.7 µM. Despite its adverse effects on noncancerous cells, Figainin 1 exhibits interesting properties for the development of new anticancer agents and anti-infective drugs against pathogenic microorganisms.
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128
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Alford MA, Baquir B, Santana FL, Haney EF, Hancock REW. Cathelicidin Host Defense Peptides and Inflammatory Signaling: Striking a Balance. Front Microbiol 2020; 11:1902. [PMID: 32982998 PMCID: PMC7481365 DOI: 10.3389/fmicb.2020.01902] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 07/20/2020] [Indexed: 12/28/2022] Open
Abstract
Host-defense peptides (HDPs) are vital components of innate immunity in all vertebrates. While their antibacterial activity toward bacterial cells was the original focus for research, their ability to modulate immune and inflammatory processes has emerged as one of their major functions in the host and as a promising approach from which to develop novel therapeutics targeting inflammation and innate immunity. In this review, with particular emphasis on the cathelicidin family of peptides, the roles of natural HDPs are examined in managing immune activation, cellular recruitment, cytokine responses, and inflammation in response to infection, as well as their contribution(s) to various inflammatory disorders and autoimmune diseases. Furthermore, we discuss current efforts to develop synthetic HDPs as therapeutics aimed at restoring balance to immune responses that are dysregulated and contribute to disease pathologies.
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Affiliation(s)
- Morgan A. Alford
- Centre for Microbial Diseases and Immunity Research, University of British Columbia, Vancouver, BC, Canada
| | - Beverlie Baquir
- Centre for Microbial Diseases and Immunity Research, University of British Columbia, Vancouver, BC, Canada
| | - Felix L. Santana
- Centre for Microbial Diseases and Immunity Research, University of British Columbia, Vancouver, BC, Canada
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| | - Evan F. Haney
- Centre for Microbial Diseases and Immunity Research, University of British Columbia, Vancouver, BC, Canada
| | - Robert E. W. Hancock
- Centre for Microbial Diseases and Immunity Research, University of British Columbia, Vancouver, BC, Canada
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129
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Bhattacharjya S, Straus SK. Design, Engineering and Discovery of Novel α-Helical and β-Boomerang Antimicrobial Peptides against Drug Resistant Bacteria. Int J Mol Sci 2020; 21:ijms21165773. [PMID: 32796755 PMCID: PMC7460851 DOI: 10.3390/ijms21165773] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 08/06/2020] [Accepted: 08/07/2020] [Indexed: 12/18/2022] Open
Abstract
In an era where the pipeline of new antibiotic development is drying up, the continuous rise of multi-drug resistant (MDR) and extensively drug resistant (XDR) bacteria are genuine threats to human health. Although antimicrobial peptides (AMPs) may serve as promising leads against drug resistant bacteria, only a few AMPs are in advanced clinical trials. The limitations of AMPs, namely their low in vivo activity, toxicity, and poor bioavailability, need to be addressed. Here, we review engineering of frog derived short α-helical AMPs (aurein, temporins) and lipopolysaccharide (LPS) binding designed β-boomerang AMPs for further development. The discovery of novel cell selective AMPs from the human proprotein convertase furin is also discussed.
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Affiliation(s)
- Surajit Bhattacharjya
- School of Biological Sciences, 60 Nanyang Drive, Nanyang Technological University, Singapore 637551, Singapore
- Correspondence: (S.B.); (S.K.S.)
| | - Suzana K. Straus
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
- Correspondence: (S.B.); (S.K.S.)
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130
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Luan X, Wu Y, Shen YW, Zhang H, Zhou YD, Chen HZ, Nagle DG, Zhang WD. Cytotoxic and antitumor peptides as novel chemotherapeutics. Nat Prod Rep 2020; 38:7-17. [PMID: 32776055 DOI: 10.1039/d0np00019a] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Covering: up to 2020Treatment resistance and drug-induced refractory malignancies pose significant challenges for current chemotherapy drugs. There have been increasing research efforts aimed at developing novel chemotherapeutics, especially from natural products and related derivatives. Natural cytotoxic peptides, an emerging source of chemotherapeutics, have exhibited the advantage of overcoming drug resistance and displayed broad-spectrum antitumor activities in the clinic. This highlight examines the increasingly popular cytotoxic peptides from isolated natural products. In-depth review of several peptides provides examples for how this novel strategy can lead to the improved anti-tumor effects. The mechanisms and current application of representative natural cytotoxic peptides (NCPs) have also been discussed, with a particular focus on future directions for interdisciplinary research.
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Affiliation(s)
- Xin Luan
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
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131
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Bioinformatic Analysis of 1000 Amphibian Antimicrobial Peptides Uncovers Multiple Length-Dependent Correlations for Peptide Design and Prediction. Antibiotics (Basel) 2020; 9:antibiotics9080491. [PMID: 32784626 PMCID: PMC7459754 DOI: 10.3390/antibiotics9080491] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 07/29/2020] [Accepted: 08/03/2020] [Indexed: 12/18/2022] Open
Abstract
Amphibians are widely distributed on different continents, except for the polar regions. They are important sources for the isolation, purification and characterization of natural compounds, including peptides with various functions. Innate immune antimicrobial peptides (AMPs) play a critical role in warding off invading pathogens, such as bacteria, fungi, parasites, and viruses. They may also have other biological functions such as endotoxin neutralization, chemotaxis, anti-inflammation, and wound healing. This article documents a bioinformatic analysis of over 1000 amphibian antimicrobial peptides registered in the Antimicrobial Peptide Database (APD) in the past 18 years. These anuran peptides were discovered in Africa, Asia, Australia, Europe, and America from 1985 to 2019. Genomic and peptidomic studies accelerated the discovery pace and underscored the necessity in establishing criteria for peptide entry into the APD. A total of 99.9% of the anuran antimicrobial peptides are less than 50 amino acids with an average length of 24 and a net charge of +2.5. Interestingly, the various amphibian peptide families (e.g., temporins, brevinins, esculentins) can be connected through multiple length-dependent relationships. With an increase in length, peptide net charge increases, while the hydrophobic content decreases. In addition, glycine, leucine, lysine, and proline all show linear correlations with peptide length. These correlations improve our understanding of amphibian peptides and may be useful for prediction and design of new linear peptides with potential applications in treating infectious diseases, cancer and diabetes.
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Zeng Q, Zeng B, Chai J, Wu J, Guo R, Gao Y, Han X, Yang J, Kotsyfakis M, Xu X. Antioxidant properties and neuroprotective effects of Esc-1GN through the regulation of MAPK and AKT signaling. Life Sci 2020; 254:117753. [DOI: 10.1016/j.lfs.2020.117753] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 04/29/2020] [Accepted: 05/04/2020] [Indexed: 02/06/2023]
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133
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Shen C, Liu M, Tian H, Li J, Xu R, Mwangi J, Lu Q, Hao X, Lai R. Conformation-Specific Blockade of αIIbβ3 by a Non-RGD Peptide to Inhibit Platelet Activation without Causing Significant Bleeding and Thrombocytopenia. Thromb Haemost 2020; 120:1432-1441. [PMID: 32717755 DOI: 10.1055/s-0040-1714215] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Bleeding and thrombocytopenia to readministration are the most serious side effects of clinical integrin αIIbβ3 antagonists such as RGD-containing peptides. Here we show that a non-RGD peptide ZDPI, identified from skin secretions of Amolops loloensis, inhibited platelet aggregation induced by agonists, such as adenosine diphosphate, collagen, arachidonic acid, PAR1AP, and integrin αIIbβ3 allosteric activator, and reduces soluble fibrinogen binding to activated platelets without perturbing adhesion numbers on immobilized fibrinogen. Further study showed that ZDPI preferred to bind to the active conformation of integrin αIIbβ3, and thus inhibited c-Src-mediated integrin signaling transduction. In contrast to currently used clinical blockers of integrin αIIbβ3, which are all conformation-unspecific blockers, ZDPI conformation specifically binds to activated integrin αIIbβ3, subsequently suppressing platelet spreading. In vivo study revealed that ZDPI inhibited carotid arterial thrombosis with limited bleeding and thrombocytopenia. A non-RGD peptide which targets the active conformation of integrin αIIbβ3, such as ZDPI, might be an excellent candidate or template to develop antithrombotics without significant bleeding and thrombocytopenia side effects.
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Affiliation(s)
- Chuanbin Shen
- Key Laboratory of Bioactive Peptides of Yunnan Province/Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences, Kunming Institute of Zoology, Kunming, Yunnan, China.,KIZ/CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Ming Liu
- Department of Molecular and Cell Biology, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, China
| | - Huiwen Tian
- Department of Zoology, Life Sciences College of Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Jiameng Li
- Department of Zoology, Life Sciences College of Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Runjia Xu
- Key Laboratory of Bioactive Peptides of Yunnan Province/Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences, Kunming Institute of Zoology, Kunming, Yunnan, China.,KIZ/CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
| | - James Mwangi
- Key Laboratory of Bioactive Peptides of Yunnan Province/Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences, Kunming Institute of Zoology, Kunming, Yunnan, China.,KIZ/CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China.,Kunming College of Life Science, University of Chinese Academy of Sciences, Beijing, China
| | - Qiumin Lu
- Key Laboratory of Bioactive Peptides of Yunnan Province/Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences, Kunming Institute of Zoology, Kunming, Yunnan, China.,KIZ/CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Xue Hao
- Key Laboratory of Bioactive Peptides of Yunnan Province/Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences, Kunming Institute of Zoology, Kunming, Yunnan, China.,KIZ/CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Ren Lai
- Key Laboratory of Bioactive Peptides of Yunnan Province/Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences, Kunming Institute of Zoology, Kunming, Yunnan, China.,KIZ/CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China.,Department of Zoology, Life Sciences College of Nanjing Agricultural University, Nanjing, Jiangsu, China.,Sino-African Joint Research Center, CAS, Kunming Institute of Zoology, Kunming, Yunnan, China
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Pharmacological Effects of a Novel Bradykinin-Related Peptide (RR-18) from the Skin Secretion of the Hejiang Frog ( Ordorrana hejiangensis) on Smooth Muscle. Biomedicines 2020; 8:biomedicines8070225. [PMID: 32709165 PMCID: PMC7400415 DOI: 10.3390/biomedicines8070225] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 07/13/2020] [Accepted: 07/14/2020] [Indexed: 01/10/2023] Open
Abstract
Bradykinin (BK) and bradykinin-related peptides (BRPs), which were identified from a diversity of amphibian skin secretions, exerted contractile and relaxing effects on non-vascular and vascular smooth muscle, respectively. Here, we report a novel bradykinin-related peptide with a molecular mass of 1890.2 Da, RVAGPDKPARISGLSPLR, which was isolated and identified from Ordorrana hejiangensis skin secretions, followed by a C-terminal extension sequence VAPQIV. The biosynthetic precursor-encoding cDNA was cloned by the “shotgun” cloning method, and the novel RR-18 was identified and structurally confirmed by high-performance liquid chromatography (HPLC) and tandem mass spectrometry (MS/MS). Subsequently, the myotropic activity of the synthetic replicate of RR-18 was investigated on the rat bladder, uterus, tail artery and ileum smooth muscle. The peptide was named RR-18 in accordance (R = N-terminal arginine, R = C-terminal arginine, 18 = number of residues). In this study, the synthetic replicates of RR-18 showed no agonist/antagonism of BK-induced rat bladder and uterus smooth muscle contraction. However, it displayed an antagonism of bradykinin-induced rat ileum contraction and arterial smooth muscle relaxation. The EC50 values of BK for ileum and artery, were 214.7 nM and 18.3 nM, respectively. When the tissue was pretreated with the novel peptide, RR-18, at the maximally effective concentration of bradykinin (1 × 10−6 M), bradykinin-induced contraction of the ileum and relaxation of the arterial smooth muscle was reduced by 50–60% and 30–40%, respectively. In conclusion, RR-18 represents novel bradykinin antagonising peptide from amphibian skin secretions. It may provide new insight into possible treatment options for chronic pain and chronic inflammation.
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Ranacyclin-NF, a Novel Bowman-Birk Type Protease Inhibitor from the Skin Secretion of the East Asian Frog, Pelophylax nigromaculatus. BIOLOGY 2020; 9:biology9070149. [PMID: 32630758 PMCID: PMC7407945 DOI: 10.3390/biology9070149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 06/19/2020] [Accepted: 06/29/2020] [Indexed: 01/10/2023]
Abstract
Serine protease inhibitors are found in plants, animals and microorganisms, where they play important roles in many physiological and pathological processes. Inhibitor scaffolds based on natural proteins and peptides have gradually become the focus of current research as they tend to bind to their targets with greater specificity than small molecules. In this report, a novel Bowman–Birk type inhibitor, named ranacyclin-NF (RNF), is described and was identified in the skin secretion of the East Asian frog, Pelophylax nigromaculatus. A synthetic replicate of the peptide was subjected to a series of functional assays. It displayed trypsin inhibitory activity with an inhibitory constant, Ki, of 447 nM and had negligible direct cytotoxicity. No observable direct antimicrobial activity was found but RNF improved the therapeutic potency of Gentamicin against Methicillin-resistant Staphylococcus aureus (MRSA). RNF shared significant sequence similarity to previously reported and related inhibitors from Odorrana grahami (ORB) and Rana esculenta (ranacyclin-T), both of which were found to be multi-functional. Two analogues of RNF, named ranacyclin-NF1 (RNF1) and ranacyclin-NF3L (RNF3L), were designed based on some features of ORB and ranacyclin-T to study structure–activity relationships. Structure–activity studies demonstrated that residues outside of the trypsin inhibitory loop (TIL) may be related to the efficacy of trypsin inhibitory activity.
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136
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Guo X, Li B, Liang S, Lai R, Liu H. A novel Kunitz-type neurotoxin peptide identified from skin secretions of the frog Amolops loloensis. Biochem Biophys Res Commun 2020; 528:99-104. [DOI: 10.1016/j.bbrc.2020.05.051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Accepted: 05/09/2020] [Indexed: 01/11/2023]
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Oliveira RS, Borges BT, Leal AP, Lailowski MM, Bordon KDCF, de Souza VQ, Vinadé L, dos Santos TG, Hyslop S, Moura S, Arantes EC, Corrado AP, Dal Belo CA. Chemical and Pharmacological Screening of Rhinella icterica (Spix 1824) Toad Parotoid Secretion in Avian Preparations. Toxins (Basel) 2020; 12:E396. [PMID: 32549266 PMCID: PMC7354542 DOI: 10.3390/toxins12060396] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 05/12/2020] [Accepted: 05/22/2020] [Indexed: 12/15/2022] Open
Abstract
The biological activity of Rhinella icterica parotoid secretion (RIPS) and some of its chromatographic fractions (RI18, RI19, RI23, and RI24) was evaluated in the current study. Mass spectrometry of these fractions indicated the presence of sarmentogenin, argentinogenin, (5β,12β)-12,14-dihydroxy-11-oxobufa-3,20,22-trienolide, marinobufagin, bufogenin B, 11α,19-dihydroxy-telocinobufagin, bufotalin, monohydroxylbufotalin, 19-oxo-cinobufagin, 3α,12β,25,26-tetrahydroxy-7-oxo-5β-cholestane-26-O-sulfate, and cinobufagin-3-hemisuberate that were identified as alkaloid and steroid compounds, in addition to marinoic acid and N-methyl-5-hydroxy-tryptamine. In chick brain slices, all fractions caused a slight decrease in cell viability, as also seen with the highest concentration of RIPS tested. In chick biventer cervicis neuromuscular preparations, RIPS and all four fractions significantly inhibited junctional acetylcholinesterase (AChE) activity. In this preparation, only fraction RI23 completely mimicked the pharmacological profile of RIPS, which included a transient facilitation in the amplitude of muscle twitches followed by progressive and complete neuromuscular blockade. Mass spectrometric analysis showed that RI23 consisted predominantly of bufogenins, a class of steroidal compounds known for their cardiotonic activity mediated by a digoxin- or ouabain-like action and the blockade of voltage-dependent L-type calcium channels. These findings indicate that the pharmacological activities of RI23 (and RIPS) are probably mediated by: (1) inhibition of AChE activity that increases the junctional content of Ach; (2) inhibition of neuronal Na+/K+-ATPase, leading to facilitation followed by neuromuscular blockade; and (3) blockade of voltage-dependent Ca2+ channels, leading to stabilization of the motor endplate membrane.
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Affiliation(s)
- Raquel Soares Oliveira
- Laboratório de Neurobiologia e Toxinologia, Programa de Pós-Graduação em Ciências Biológicas (PPGCB), Universidade Federal do Pampa (UNIPAMPA), Avenida Antônio Trilha 1847, São Gabriel RS 97300-000, Brazil; (R.S.O.); (B.T.B.); (A.P.L.); (V.Q.d.S.)
| | - Bruna Trindade Borges
- Laboratório de Neurobiologia e Toxinologia, Programa de Pós-Graduação em Ciências Biológicas (PPGCB), Universidade Federal do Pampa (UNIPAMPA), Avenida Antônio Trilha 1847, São Gabriel RS 97300-000, Brazil; (R.S.O.); (B.T.B.); (A.P.L.); (V.Q.d.S.)
| | - Allan Pinto Leal
- Laboratório de Neurobiologia e Toxinologia, Programa de Pós-Graduação em Ciências Biológicas (PPGCB), Universidade Federal do Pampa (UNIPAMPA), Avenida Antônio Trilha 1847, São Gabriel RS 97300-000, Brazil; (R.S.O.); (B.T.B.); (A.P.L.); (V.Q.d.S.)
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica (PPGBTox), Universidade Federal de Santa Maria (UFSM), Avenida Roraima 1000, Santa Maria RS 97105-900, Brazil
| | - Manuela Merlin Lailowski
- Laboratório de Biotecnologia de Produtos Naturais e Sintéticos, Instituto de Biotecnologia, Universidade de Caxias do Sul (UCS), Rua Francisco Getúlio Vargas 1130, Caxias do Sul RS 95070-560, Brazil; (M.M.L.); (S.M.)
| | - Karla de Castro Figueiredo Bordon
- Departamento de Ciências BioMoleculares, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo (USP), Avenida do Café, s/n, Ribeirão Preto SP 14.040-903, Brazil; (K.d.C.F.B.); (E.C.A.)
| | - Velci Queiróz de Souza
- Laboratório de Neurobiologia e Toxinologia, Programa de Pós-Graduação em Ciências Biológicas (PPGCB), Universidade Federal do Pampa (UNIPAMPA), Avenida Antônio Trilha 1847, São Gabriel RS 97300-000, Brazil; (R.S.O.); (B.T.B.); (A.P.L.); (V.Q.d.S.)
| | - Lúcia Vinadé
- Laboratório de Neurobiologia e Toxinologia, Programa de Pós-Graduação em Ciências Biológicas (PPGCB), Universidade Federal do Pampa (UNIPAMPA), Avenida Antônio Trilha 1847, São Gabriel RS 97300-000, Brazil; (R.S.O.); (B.T.B.); (A.P.L.); (V.Q.d.S.)
| | - Tiago Gomes dos Santos
- Laboratório de Estudos em Biodiversidade Pampiana, Universidade Federal do Pampa (UNIPAMPA), Avenida Antônio Trilha 1847, São Gabriel RS 97300-000, Brazil;
| | - Stephen Hyslop
- Departamento de Farmacologia, Faculdade de Ciências Médicas, Universidade Estadual de Campinas (UNICAMP), Rua Tessália Vieira de Camargo, 126, Cidade Universitária Zeferino Vaz, Campinas SP 13083-887, Brazil;
| | - Sidnei Moura
- Laboratório de Biotecnologia de Produtos Naturais e Sintéticos, Instituto de Biotecnologia, Universidade de Caxias do Sul (UCS), Rua Francisco Getúlio Vargas 1130, Caxias do Sul RS 95070-560, Brazil; (M.M.L.); (S.M.)
| | - Eliane Candiani Arantes
- Departamento de Ciências BioMoleculares, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo (USP), Avenida do Café, s/n, Ribeirão Preto SP 14.040-903, Brazil; (K.d.C.F.B.); (E.C.A.)
| | - Alexandre Pinto Corrado
- Departamento de Farmacologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo (USP), Avenida Bandeirantes 3900, Ribeirão Preto SP 14040-030, Brazil;
| | - Cháriston A. Dal Belo
- Laboratório de Neurobiologia e Toxinologia, Programa de Pós-Graduação em Ciências Biológicas (PPGCB), Universidade Federal do Pampa (UNIPAMPA), Avenida Antônio Trilha 1847, São Gabriel RS 97300-000, Brazil; (R.S.O.); (B.T.B.); (A.P.L.); (V.Q.d.S.)
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica (PPGBTox), Universidade Federal de Santa Maria (UFSM), Avenida Roraima 1000, Santa Maria RS 97105-900, Brazil
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Wang Q, Bian X, Zeng L, Pan F, Liu L, Liang J, Wang L, Zhou K, Lee W, Xiang Y, Li S, Teng M, Li X, Guo X, Zhang Y. A cellular endolysosome-modulating pore-forming protein from a toad is negatively regulated by its paralog under oxidizing conditions. J Biol Chem 2020; 295:10293-10306. [PMID: 32499370 DOI: 10.1074/jbc.ra120.013556] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Revised: 05/22/2020] [Indexed: 01/05/2023] Open
Abstract
Endolysosomes are key players in cell physiology, including molecular exchange, immunity, and environmental adaptation. They are the molecular targets of some pore-forming aerolysin-like proteins (ALPs) that are widely distributed in animals and plants and are functionally related to bacterial toxin aerolysins. βγ-CAT is a complex of an ALP (BmALP1) and a trefoil factor (BmTFF3) in the firebelly toad (Bombina maxima). It is the first example of a secreted endogenous pore-forming protein that modulates the biochemical properties of endolysosomes by inducing pore formation in these intracellular vesicles. Here, using a large array of biochemical and cell biology methods, we report the identification of BmALP3, a paralog of BmALP1 that lacks membrane pore-forming capacity. We noted that both BmALP3 and BmALP1 contain a conserved cysteine in their C-terminal regions. BmALP3 was readily oxidized to a disulfide bond-linked homodimer, and this homodimer then oxidized BmALP1 via disulfide bond exchange, resulting in the dissociation of βγ-CAT subunits and the elimination of biological activity. Consistent with its behavior in vitro, BmALP3 sensed environmental oxygen tension in vivo, leading to modulation of βγ-CAT activity. Interestingly, we found that this C-terminal cysteine site is well conserved in numerous vertebrate ALPs. These findings uncover the existence of a regulatory ALP (BmALP3) that modulates the activity of an active ALP (BmALP1) in a redox-dependent manner, a property that differs from those of bacterial toxin aerolysins.
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Affiliation(s)
- Qiquan Wang
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences/Key Laboratory of Bioactive Peptides of Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China.,Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Xianling Bian
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences/Key Laboratory of Bioactive Peptides of Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China.,Hefei National Laboratory for Physical Sciences at Microscale, Innovation Center for Cell Signaling Network, School of Life Science, University of Science and Technology of China, Hefei, Anhui, China
| | - Lin Zeng
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences/Key Laboratory of Bioactive Peptides of Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Fei Pan
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences/Key Laboratory of Bioactive Peptides of Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China.,Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Lingzhen Liu
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences/Key Laboratory of Bioactive Peptides of Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China.,Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Jinyang Liang
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences/Key Laboratory of Bioactive Peptides of Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China.,Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Lingyan Wang
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences/Key Laboratory of Bioactive Peptides of Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Kaifeng Zhou
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences/Key Laboratory of Bioactive Peptides of Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Wenhui Lee
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences/Key Laboratory of Bioactive Peptides of Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Yang Xiang
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences/Key Laboratory of Bioactive Peptides of Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Sheng'an Li
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences/Key Laboratory of Bioactive Peptides of Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Maikun Teng
- Hefei National Laboratory for Physical Sciences at Microscale, Innovation Center for Cell Signaling Network, School of Life Science, University of Science and Technology of China, Hefei, Anhui, China
| | - Xu Li
- Hefei National Laboratory for Physical Sciences at Microscale, Innovation Center for Cell Signaling Network, School of Life Science, University of Science and Technology of China, Hefei, Anhui, China
| | - Xiaolong Guo
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences/Key Laboratory of Bioactive Peptides of Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Yun Zhang
- Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences/Key Laboratory of Bioactive Peptides of Yunnan Province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China .,Center for Excellence in Animal Evolution and Genetics, Chinese Academy of Sciences, Kunming, Yunnan, China
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139
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Santana CJC, Magalhães ACM, Prías-Márquez CA, Falico DA, dos Santos Júnior ACM, Lima BD, Ricart CAO, de Pilger DRB, Bonotto RM, Moraes CB, Freitas-Júnior LH, Álvares ADCM, Freitas SM, Luz IS, Pires Jr. OR, Fontes W, Castro MS. Biological Properties of a Novel Multifunctional Host Defense Peptide from the Skin Secretion of the Chaco Tree Frog, Boana raniceps. Biomolecules 2020; 10:E790. [PMID: 32443921 PMCID: PMC7277517 DOI: 10.3390/biom10050790] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 03/17/2020] [Accepted: 03/18/2020] [Indexed: 01/10/2023] Open
Abstract
In recent years, the number of new antimicrobial drugs launched on the market has decreased considerably even though there has been an increase in the number of resistant microbial strains. Thus, antimicrobial resistance has become a serious public health problem. Amphibian skin secretions are a rich source of host defense peptides, which generally are cationic and hydrophobic molecules, with a broad-spectrum of activity. In this study, one novel multifunctional defense peptide was isolated from the skin secretion of the Chaco tree frog, Boana raniceps. Figainin 2 (1FLGAILKIGHALAKTVLPMVTNAFKPKQ28) is cationic and hydrophobic, adopts an α-helical structure in 50% (v/v) trifluoroethanol (TFE), and is thermally stable. This peptide exhibited activity against Gram-negative and Gram-positive pathogenic bacteria arboviruses, T. cruzi epimastigotes; however, it did not show activity against yeasts. Figainin 2 also showed antiproliferative activity on cancer cells, is moderately active on human erythrocytes, and activates the oxidative burst in human neutrophils.
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Affiliation(s)
- Carlos José Correia Santana
- Laboratory of Toxinology, Department of Physiological Sciences, Institute of Biology, University of Brasília, Brasília 70.910-900, Brazil; (C.J.C.S.); (A.C.M.M.); (C.A.P.-M.); (D.A.F.); (O.R.P.J.)
- Laboratory of Protein Chemistry and Biochemistry, Department of Cell Biology, Institute of Biology, University of Brasília, Brasília 70.910-900, Brazil; (A.C.M.d.S.J.); (C.A.O.R.); (I.S.L.); (W.F.)
| | - Ana Carolina Martins Magalhães
- Laboratory of Toxinology, Department of Physiological Sciences, Institute of Biology, University of Brasília, Brasília 70.910-900, Brazil; (C.J.C.S.); (A.C.M.M.); (C.A.P.-M.); (D.A.F.); (O.R.P.J.)
| | - César Augusto Prías-Márquez
- Laboratory of Toxinology, Department of Physiological Sciences, Institute of Biology, University of Brasília, Brasília 70.910-900, Brazil; (C.J.C.S.); (A.C.M.M.); (C.A.P.-M.); (D.A.F.); (O.R.P.J.)
- Laboratory of Protein Chemistry and Biochemistry, Department of Cell Biology, Institute of Biology, University of Brasília, Brasília 70.910-900, Brazil; (A.C.M.d.S.J.); (C.A.O.R.); (I.S.L.); (W.F.)
| | - Diego A. Falico
- Laboratory of Toxinology, Department of Physiological Sciences, Institute of Biology, University of Brasília, Brasília 70.910-900, Brazil; (C.J.C.S.); (A.C.M.M.); (C.A.P.-M.); (D.A.F.); (O.R.P.J.)
- Laboratory of Protein Chemistry and Biochemistry, Department of Cell Biology, Institute of Biology, University of Brasília, Brasília 70.910-900, Brazil; (A.C.M.d.S.J.); (C.A.O.R.); (I.S.L.); (W.F.)
| | - Agenor C. M. dos Santos Júnior
- Laboratory of Protein Chemistry and Biochemistry, Department of Cell Biology, Institute of Biology, University of Brasília, Brasília 70.910-900, Brazil; (A.C.M.d.S.J.); (C.A.O.R.); (I.S.L.); (W.F.)
- Laboratory of Gene Biology, Department of Cell Biology, University of Brasília, Brasília 70.910-900, Brazil;
| | - Beatriz D. Lima
- Laboratory of Gene Biology, Department of Cell Biology, University of Brasília, Brasília 70.910-900, Brazil;
| | - Carlos André Ornelas Ricart
- Laboratory of Protein Chemistry and Biochemistry, Department of Cell Biology, Institute of Biology, University of Brasília, Brasília 70.910-900, Brazil; (A.C.M.d.S.J.); (C.A.O.R.); (I.S.L.); (W.F.)
| | - Denise Regina Bairros de Pilger
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo 05.508-900, Brazil; (D.R.B.d.P.); (R.M.B.); (C.B.M.); (L.H.F.-J.)
| | - Rafaela Milan Bonotto
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo 05.508-900, Brazil; (D.R.B.d.P.); (R.M.B.); (C.B.M.); (L.H.F.-J.)
| | - Carolina Borsoi Moraes
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo 05.508-900, Brazil; (D.R.B.d.P.); (R.M.B.); (C.B.M.); (L.H.F.-J.)
| | - Lúcio H. Freitas-Júnior
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo 05.508-900, Brazil; (D.R.B.d.P.); (R.M.B.); (C.B.M.); (L.H.F.-J.)
| | - Alice da Cunha Morales Álvares
- Laboratory of Biophysics, Department of Cell Biology, Institute of Biology, University of Brasília, Brasília 70.910-900, Brazil; (A.d.C.M.Á.); (S.M.F.)
| | - Sonia Maria Freitas
- Laboratory of Biophysics, Department of Cell Biology, Institute of Biology, University of Brasília, Brasília 70.910-900, Brazil; (A.d.C.M.Á.); (S.M.F.)
| | - Isabelle S. Luz
- Laboratory of Protein Chemistry and Biochemistry, Department of Cell Biology, Institute of Biology, University of Brasília, Brasília 70.910-900, Brazil; (A.C.M.d.S.J.); (C.A.O.R.); (I.S.L.); (W.F.)
| | - Osmindo Rodrigues Pires Jr.
- Laboratory of Toxinology, Department of Physiological Sciences, Institute of Biology, University of Brasília, Brasília 70.910-900, Brazil; (C.J.C.S.); (A.C.M.M.); (C.A.P.-M.); (D.A.F.); (O.R.P.J.)
| | - Wagner Fontes
- Laboratory of Protein Chemistry and Biochemistry, Department of Cell Biology, Institute of Biology, University of Brasília, Brasília 70.910-900, Brazil; (A.C.M.d.S.J.); (C.A.O.R.); (I.S.L.); (W.F.)
| | - Mariana S. Castro
- Laboratory of Toxinology, Department of Physiological Sciences, Institute of Biology, University of Brasília, Brasília 70.910-900, Brazil; (C.J.C.S.); (A.C.M.M.); (C.A.P.-M.); (D.A.F.); (O.R.P.J.)
- Laboratory of Protein Chemistry and Biochemistry, Department of Cell Biology, Institute of Biology, University of Brasília, Brasília 70.910-900, Brazil; (A.C.M.d.S.J.); (C.A.O.R.); (I.S.L.); (W.F.)
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Freitas e Silva KS, C. Silva L, Gonçales RA, Neves BJ, Soares CM, Pereira M. Setting New Routes for Antifungal Drug Discovery Against Pathogenic Fungi. Curr Pharm Des 2020; 26:1509-1520. [DOI: 10.2174/1381612826666200317125956] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Accepted: 02/11/2020] [Indexed: 01/08/2023]
Abstract
:Fungal diseases are life-threatening to human health and responsible for millions of deaths around the world. Fungal pathogens lead to a high number of morbidity and mortality. Current antifungal treatment comprises drugs, such as azoles, echinocandins, and polyenes and the cure is not guaranteed. In addition, such drugs are related to severe side effects and the treatment lasts for an extended period. Thus, setting new routes for the discovery of effective and safe antifungal drugs should be a priority within the health care system. The discovery of alternative and efficient antifungal drugs showing fewer side effects is time-consuming and remains a challenge. Natural products can be a source of antifungals and used in combinatorial therapy. The most important natural products are antifungal peptides, antifungal lectins, antifungal plants, and fungi secondary metabolites. Several proteins, enzymes, and metabolic pathways could be targets for the discovery of efficient inhibitor compounds and recently, heat shock proteins, calcineurin, salinomycin, the trehalose biosynthetic pathway, and the glyoxylate cycle have been investigated in several fungal species. HSP protein inhibitors and echinocandins have been shown to have a fungicidal effect against azole-resistant fungi strains. Transcriptomic and proteomic approaches have advanced antifungal drug discovery and pointed to new important specific-pathogen targets. Certain enzymes, such as those from the glyoxylate cycle, have been a target of antifungal compounds in several fungi species. Natural and synthetic compounds inhibited the activity of such enzymes and reduced the ability of fungal cells to transit from mycelium to yeast, proving to be promisor antifungal agents. Finally, computational biology has developed effective approaches, setting new routes for early antifungal drug discovery since normal approaches take several years from discovery to clinical use. Thus, the development of new antifungal strategies might reduce the therapeutic time and increase the quality of life of patients.
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Affiliation(s)
- Kleber S. Freitas e Silva
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | - Lívia C. Silva
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | - Relber A. Gonçales
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | - Bruno J. Neves
- LabMol - Laboratory for Molecular Modeling and Drug Design, Faculdade de Farmácia, Universidade Federal de Goiás, Goiânia, GO, 74605-510, Brazil
| | - Célia M.A. Soares
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | - Maristela Pereira
- Laboratório de Biologia Molecular, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
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Casciaro B, Cappiello F, Loffredo MR, Ghirga F, Mangoni ML. The Potential of Frog Skin Peptides for Anti-Infective Therapies: The Case of Esculentin-1a(1-21)NH2. Curr Med Chem 2020; 27:1405-1419. [PMID: 31333082 DOI: 10.2174/0929867326666190722095408] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 06/25/2019] [Accepted: 07/16/2019] [Indexed: 12/26/2022]
Abstract
Antimicrobial Peptides (AMPs) are the key effectors of the innate immunity and represent promising molecules for the development of new antibacterial drugs. However, to achieve this goal, some problems need to be overcome: (i) the cytotoxic effects at high concentrations; (ii) the poor biostability and (iii) the difficulty in reaching the target site. Frog skin is one of the richest natural storehouses of AMPs, and over the years, many peptides have been isolated from it, characterized and classified into several families encompassing temporins, brevinins, nigrocins and esculentins. In this review, we summarized how the isolation/characterization of peptides belonging to the esculentin-1 family drove us to the design of an analogue, i.e. esculentin-1a(1-21)NH2, with a powerful antimicrobial action and immunomodulatory properties. The peptide had a wide spectrum of activity, especially against the opportunistic Gram-negative bacterium Pseudomonas aeruginosa. We described the structural features and the in vitro/in vivo biological characterization of this peptide as well as the strategies used to improve its biological properties. Among them: (i) the design of a diastereomer carrying Damino acids in order to reduce the peptide's cytotoxicity and improve its half-life; (ii) the covalent conjugation of the peptide to gold nanoparticles or its encapsulation into poly(lactide- co-glycolide) nanoparticles; and (iii) the peptide immobilization to biomedical devices (such as silicon hydrogel contact lenses) to obtain an antibacterial surface able to reduce microbial growth and attachment. Summing up the best results obtained so far, this review traces all the steps that led these frog-skin AMPs to the direction of peptide-based drugs for clinical use.
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Affiliation(s)
- Bruno Casciaro
- Laboratory affiliated to Pasteur Italia-Fondazione Cenci Bolognetti, Department of Biochemical Sciences, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy.,Center for Life Nano Science@ Sapienza, Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00161 Rome, Italy
| | - Floriana Cappiello
- Laboratory affiliated to Pasteur Italia-Fondazione Cenci Bolognetti, Department of Biochemical Sciences, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Maria Rosa Loffredo
- Laboratory affiliated to Pasteur Italia-Fondazione Cenci Bolognetti, Department of Biochemical Sciences, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Francesca Ghirga
- Center for Life Nano Science@ Sapienza, Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00161 Rome, Italy
| | - Maria Luisa Mangoni
- Laboratory affiliated to Pasteur Italia-Fondazione Cenci Bolognetti, Department of Biochemical Sciences, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
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142
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Fusco LS, Cajade R, Piñeiro JM, Torres AM, da Silva IRF, Hyslop S, Leiva LC, Pimenta DC, Bustillo S. Biochemical characterization and cytotoxic effect of the skin secretion from the red-spotted Argentina frog Argenteohyla siemersi (Anura: Hylidae). J Venom Anim Toxins Incl Trop Dis 2020; 26:e20190078. [PMID: 32280338 PMCID: PMC7112748 DOI: 10.1590/1678-9199-jvatitd-2019-0078] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Background: Argenteohyla siemersi (red-spotted Argentina frog) is a
casque-headed tree frog species belonging to the Hylidae family. This
species has a complex combination of anti-predator defense mechanisms that
include a highly lethal skin secretion. However, biochemical composition and
biological effects of this secretion have not yet been studied. Methods: The A. siemersi skin secretion samples were analyzed by mass
spectrometry and chromatographic analysis (MALDI-TOF/MS, RP-HPLC and GC-MS).
Proteins were also studied by SDS-PAGE. Among the biological activities
evaluated, several enzymatic activities (hemolytic, phospholipase
A2, clotting, proteolytic and amidolytic) were assessed.
Furthermore, the cytotoxic activity (cytolysis and fluorescence staining)
was evaluated on myoblasts of the C2C12 cell line. Results: The MALDI-TOF/MS analysis identified polypeptides and proteins in the aqueous
solution of A. siemersi skin secretion. SDS-PAGE revealed
the presence of proteins with molecular masses from 15 to 55 kDa. Steroids,
but no alkaloids or peptides (less than 5 KDa), were detected using mass
spectrometry. Skin secretion revealed the presence of lipids in methanolic
extract, as analyzed by CG-MS. This secretion showed hemolytic and
phospholipase A2 activities, but was devoid of amidolytic,
proteolytic or clotting activities. Moreover, dose-dependent cytotoxicity in
cultured C2C12 myoblasts of the skin secretion was demonstrated.
Morphological analysis, quantification of lactate dehydrogenase release and
fluorescence staining indicated that the cell death triggered by this
secretion involved necrosis. Conclusions: Results presented herein evidence the biochemical composition and biological
effects of A. siemersi skin secretion and contribute to the
knowledge on the defense mechanisms of casque-headed frogs.
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Affiliation(s)
- Luciano S Fusco
- Protein Research Laboratory (LabInPro), IQUIBA-NEA CONICET, National University of the Northeast, Corrientes, Argentina
| | - Rodrigo Cajade
- Herpetology Laboratory, National University of the Northeast, Corrientes, Argentina
| | - Jose M Piñeiro
- Herpetology Laboratory, National University of the Northeast, Corrientes, Argentina
| | - Ana M Torres
- Natural Products Laboratory, National University of the Northeast, Corrientes, Argentina
| | - Igor R F da Silva
- Department of Pharmacology, School of Medical Sciences, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Stephen Hyslop
- Department of Pharmacology, School of Medical Sciences, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Laura C Leiva
- Protein Research Laboratory (LabInPro), IQUIBA-NEA CONICET, National University of the Northeast, Corrientes, Argentina
| | - Daniel C Pimenta
- Laboratory of Biochemistry and Biophysics, Butantan Institute, São Paulo, SP, Brazil
| | - Soledad Bustillo
- Protein Research Laboratory (LabInPro), IQUIBA-NEA CONICET, National University of the Northeast, Corrientes, Argentina
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143
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The Antioxidant Peptide Salamandrin-I: First Bioactive Peptide Identified from Skin Secretion of Salamandra Genus (Salamandra salamandra). Biomolecules 2020; 10:biom10040512. [PMID: 32230960 PMCID: PMC7226163 DOI: 10.3390/biom10040512] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 03/23/2020] [Accepted: 03/24/2020] [Indexed: 12/25/2022] Open
Abstract
Amphibian skin is a multifunctional organ that plays key roles in defense, breathing, and water balance. In this study, skin secretion samples of the fire salamander (Salamandra salamandra) were separated using RP-HPLC and de novo sequenced using MALDI-TOF MS/MS. Next, we used an in silico platform to screen antioxidant molecules in the framework of density functional theory. One of the identified peptides, salamandrin-I, [M + H]+ = 1406.6 Da, was selected for solid-phase synthesis; it showed free radical scavenging activity against DPPH and ABTS radicals. Salamandrin-I did not show antimicrobial activity against Gram-positive and -negative bacteria. In vitro assays using human microglia and red blood cells showed that salamandrin-I has no cytotoxicity up to the concentration of 100 µM. In addition, in vivo toxicity tests on Galleria mellonella larvae resulted in no mortality at 20 and 40 mg/kg. Antioxidant peptides derived from natural sources are increasingly attracting interest. Among several applications, these peptides, such as salamandrin-I, can be used as templates in the design of novel antioxidant molecules that may contribute to devising strategies for more effective control of neurological disease.
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144
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Cayuela H, Valenzuela-Sánchez A, Teulier L, Martínez-Solano Í, Léna JP, Merilä J, Muths E, Shine R, Quay L, Denoël M, Clobert J, Schmidt BR. Determinants and Consequences of Dispersal in Vertebrates with Complex Life Cycles: A Review of Pond-Breeding Amphibians. QUARTERLY REVIEW OF BIOLOGY 2020. [DOI: 10.1086/707862] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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145
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Raaymakers C, Stijlemans B, Martin C, Zaman S, Ballet S, Martel A, Pasmans F, Roelants K. A New Family of Diverse Skin Peptides from the Microhylid Frog Genus Phrynomantis. Molecules 2020; 25:E912. [PMID: 32085597 PMCID: PMC7070584 DOI: 10.3390/molecules25040912] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 02/12/2020] [Accepted: 02/18/2020] [Indexed: 01/10/2023] Open
Abstract
A wide range of frogs produce skin poisons composed of bioactive peptides for defence against pathogens, parasites and predators. While several frog families have been thoroughly screened for skin-secreted peptides, others, like the Microhylidae, have remained mostly unexplored. Previous studies of microhylids found no evidence of peptide secretion, suggesting that this defence adaptation was evolutionarily lost. We conducted transcriptome analyses of the skins of Phrynomantis bifasciatus and Phrynomantis microps, two African microhylid species long suspected to be poisonous. Our analyses reveal 17 evolutionary related transcripts that diversified from to those of cytolytic peptides found in other frog families. The 19 peptides predicted to be processed from these transcripts, named phrynomantins, show a striking structural diversity that is distinct from any previously identified frog skin peptide. Functional analyses of five phrynomantins confirm the loss of a cytolytic function and the absence of insecticidal or proinflammatory activity, suggesting that they represent an evolutionary transition to a new, yet unknown function. Our study shows that peptides have been retained in the defence poison of at least one microhylid lineage and encourages research on similarly understudied taxa to further elucidate the diversity and evolution of skin defence molecules.
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Affiliation(s)
- Constantijn Raaymakers
- Amphibian Evolution Lab, Biology Department, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Elsene, Belgium; (C.R.); (S.Z.)
- Wildlife Health Ghent, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium; (A.M.); (F.P.)
| | - Benoit Stijlemans
- Unit of Cellular and Molecular Immunology, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Elsene, Belgium;
- Myeloid Cell Immunology Lab, VIB Centre for Inflammation Research, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Elsene, Belgium
| | - Charlotte Martin
- Research Group of Organic Chemistry, Department of Chemistry and Department of Bio-engineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Elsene, Belgium; (C.M.); (S.B.)
| | - Shabnam Zaman
- Amphibian Evolution Lab, Biology Department, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Elsene, Belgium; (C.R.); (S.Z.)
| | - Steven Ballet
- Research Group of Organic Chemistry, Department of Chemistry and Department of Bio-engineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Elsene, Belgium; (C.M.); (S.B.)
| | - An Martel
- Wildlife Health Ghent, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium; (A.M.); (F.P.)
| | - Frank Pasmans
- Wildlife Health Ghent, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium; (A.M.); (F.P.)
| | - Kim Roelants
- Amphibian Evolution Lab, Biology Department, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Elsene, Belgium; (C.R.); (S.Z.)
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146
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Sousa NA, Oliveira GAL, de Oliveira AP, Lopes ALF, Iles B, Nogueira KM, Araújo TSL, Souza LKM, Araújo AR, Ramos-Jesus J, Plácido A, Amaral C, Campelo YDM, Barbosa EA, Portugal CC, Socodato R, Lobo A, Relvas J, Bemquerer M, Eaton P, Leite JRSA, Medeiros JVR. Novel Ocellatin Peptides Mitigate LPS-induced ROS Formation and NF-kB Activation in Microglia and Hippocampal Neurons. Sci Rep 2020; 10:2696. [PMID: 32060388 PMCID: PMC7021831 DOI: 10.1038/s41598-020-59665-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 01/31/2020] [Indexed: 12/18/2022] Open
Abstract
Cutaneous secretions of amphibians have bioactive compounds, such as peptides, with potential for biotechnological applications. Therefore, this study aimed to determine the primary structure and investigate peptides obtained from the cutaneous secretions of the amphibian, Leptodactylus vastus, as a source of bioactive molecules. The peptides obtained possessed the amino acid sequences, GVVDILKGAAKDLAGH and GVVDILKGAAKDLAGHLASKV, with monoisotopic masses of [M + H]± = 1563.8 Da and [M + H]± = 2062.4 Da, respectively. The molecules were characterized as peptides of the class of ocellatins and were named as Ocellatin-K1(1-16) and Ocellatin-K1(1-21). Functional analysis revealed that Ocellatin-K1(1-16) and Ocellatin-K1(1-21) showed weak antibacterial activity. However, treatment of mice with these ocellatins reduced the nitrite and malondialdehyde content. Moreover, superoxide dismutase enzymatic activity and glutathione concentration were increased in the hippocampus of mice. In addition, Ocellatin-K1(1-16) and Ocellatin-K1(1-21) were effective in impairing lipopolysaccharide (LPS)-induced reactive oxygen species (ROS) formation and NF-kB activation in living microglia. We incubated hippocampal neurons with microglial conditioned media treated with LPS and LPS in the presence of Ocellatin-K1(1-16) and Ocellatin-K1(1-21) and observed that both peptides reduced the oxidative stress in hippocampal neurons. Furthermore, these ocellatins demonstrated low cytotoxicity towards erythrocytes. These functional properties suggest possible to neuromodulatory therapeutic applications.
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Affiliation(s)
- Nayara A Sousa
- Laboratório de Farmacologia da Inflamação e Doenças Gastrintestinais, Universidade Federal do Delta do Parnaíba, UFDPar, Piauí, Brazil
| | - Guilherme A L Oliveira
- Laboratório de Farmacologia da Inflamação e Doenças Gastrintestinais, Universidade Federal do Delta do Parnaíba, UFDPar, Piauí, Brazil
| | - Ana Patrícia de Oliveira
- Laboratório de Farmacologia da Inflamação e Doenças Gastrintestinais, Universidade Federal do Delta do Parnaíba, UFDPar, Piauí, Brazil
| | - André Luís F Lopes
- Laboratório de Farmacologia da Inflamação e Doenças Gastrintestinais, Universidade Federal do Delta do Parnaíba, UFDPar, Piauí, Brazil
| | - Bruno Iles
- Laboratório de Farmacologia da Inflamação e Doenças Gastrintestinais, Universidade Federal do Delta do Parnaíba, UFDPar, Piauí, Brazil
| | - Kerolayne M Nogueira
- Laboratório de Farmacologia da Inflamação e Doenças Gastrintestinais, Universidade Federal do Delta do Parnaíba, UFDPar, Piauí, Brazil
| | - Thiago S L Araújo
- Laboratório de Farmacologia da Inflamação e Doenças Gastrintestinais, Universidade Federal do Delta do Parnaíba, UFDPar, Piauí, Brazil.,Instituto de Educação Superior do Vale do Parnaíba, FAHESP/IESVAP/NRE, Parnaíba, Brazil
| | - Luan K M Souza
- Laboratório de Farmacologia da Inflamação e Doenças Gastrintestinais, Universidade Federal do Delta do Parnaíba, UFDPar, Piauí, Brazil.,Instituto de Educação Superior do Vale do Parnaíba, FAHESP/IESVAP/NRE, Parnaíba, Brazil
| | - Alyne R Araújo
- Núcleo de Pesquisa em Biodiversidade e Biotecnologia, Universidade Federal do Piauí, UFPI, Piauí, Brazil
| | - Joilson Ramos-Jesus
- Núcleo de Pesquisa em Biodiversidade e Biotecnologia, Universidade Federal do Piauí, UFPI, Piauí, Brazil.,Instituto de Educação Superior do Vale do Parnaíba, FAHESP/IESVAP/NRE, Parnaíba, Brazil
| | - Alexandra Plácido
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciencias da Universidade do Porto, Porto, Portugal.,Instituto de Investigação e Inovação em Saúde and Instituto de Biologia Molecular e Celular (IBMC), Universidade do Porto, Porto, Portugal
| | - Constança Amaral
- Instituto de Medicina Molecular, IMM, Universidade de Lisboa, Lisboa, Portugal
| | - Yuri D M Campelo
- Instituto de Educação Superior do Vale do Parnaíba, FAHESP/IESVAP/NRE, Parnaíba, Brazil
| | - Eder Alves Barbosa
- Laboratório de Síntese e Análise de Biomoléculas, LSAB, Instituto de Química, UnB, Brasília, Brazil
| | - Camila C Portugal
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciencias da Universidade do Porto, Porto, Portugal
| | - Renato Socodato
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciencias da Universidade do Porto, Porto, Portugal
| | - Andrea Lobo
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciencias da Universidade do Porto, Porto, Portugal
| | - Joao Relvas
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciencias da Universidade do Porto, Porto, Portugal
| | | | - Peter Eaton
- LAQV/REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciencias da Universidade do Porto, Porto, Portugal.,Instituto de Medicina Molecular, IMM, Universidade de Lisboa, Lisboa, Portugal
| | - José Roberto S A Leite
- Núcleo de Pesquisa em Morfologia e Imunonologia Aplicada, NuPMIA, Área Morfologia, Faculdade de Medicina, UnB, Brasília, Brazil
| | - Jand Venes R Medeiros
- Laboratório de Farmacologia da Inflamação e Doenças Gastrintestinais, Universidade Federal do Delta do Parnaíba, UFDPar, Piauí, Brazil. .,Núcleo de Pesquisa em Biodiversidade e Biotecnologia, Universidade Federal do Piauí, UFPI, Piauí, Brazil.
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147
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Malik E, Phoenix DA, Badiani K, Snape TJ, Harris F, Singh J, Morton LHG, Dennison SR. Biophysical studies on the antimicrobial activity of linearized esculentin 2EM. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2020; 1862:183141. [PMID: 31790693 DOI: 10.1016/j.bbamem.2019.183141] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 10/25/2019] [Accepted: 11/27/2019] [Indexed: 02/07/2023]
Abstract
Linearized esculentin 2 EM (E2EM-lin) from the frog, Glandirana emeljanovi was highly active against Gram-positive bacteria (minimum lethal concentration ≤ 5.0 μM) and strongly α-helical in the presence of lipid mimics of their membranes (>55.0%). The N-terminal α-helical structure adopted by E2EM-lin showed the potential to form a membrane interactive, tilted peptide with an hydrophobicity gradient over residues 9 to 23. E2EM-lin inserted strongly into lipid mimics of membranes from Gram-positive bacteria (maximal surface pressure changes ≥5.5 mN m-1), inducing increased rigidity (Cs-1 ↑), thermodynamic instability (ΔGmix < 0 → ΔGmix > 0) and high levels of lysis (>50.0%). These effects appeared to be driven by the high anionic lipid content of membranes from Gram-positive bacteria; namely phosphatidylglycerol (PG) and cardiolipin (CL) species. The high levels of α-helicity (60.0%), interaction (maximal surface pressure change = 6.7 mN m-1) and lysis (66.0%) shown by E2EM-lin with PG species was a major driver in the ability of the peptide to lyse and kill Gram-positive bacteria. E2EM-lin also showed high levels of α-helicity (62.0%) with CL species but only low levels of interaction (maximal surface pressure change = 2.9 mN m-1) and lysis (21.0%) with the lipid. These combined data suggest that E2EM-lin has a specificity for killing Gram-positive bacteria that involves the formation of tilted structure and appears to be primarily driven by PG-mediated membranolysis. These structure/function relationships are used to help explain the pore forming process proposed to describe the membranolytic, antibacterial action of E2EM-lin.
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Affiliation(s)
- Erum Malik
- School of Forensic and Applied Science, University of Central Lancashire, Preston PR1 2HE, UK
| | - David A Phoenix
- Office of the Vice Chancellor, London South Bank University, 103 Borough Road, London SE1 0AA, UK
| | - Kamal Badiani
- Pepceuticals Limited, 4 Feldspar Close, Warrens Park, Enderby, Leicestershire LE19 4JS, UK
| | - Timothy J Snape
- School of Pharmacy and Biological Sciences, University of Central Lancashire, Preston PR1 2HE, UK
| | - Frederick Harris
- School of Forensic and Applied Science, University of Central Lancashire, Preston PR1 2HE, UK
| | - Jaipaul Singh
- School of Forensic and Applied Science, University of Central Lancashire, Preston PR1 2HE, UK
| | - Leslie Hugh Glyn Morton
- School of Forensic and Applied Science, University of Central Lancashire, Preston PR1 2HE, UK
| | - Sarah R Dennison
- School of Pharmacy and Biological Sciences, University of Central Lancashire, Preston PR1 2HE, UK.
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148
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Zuo C, Yan BJ, Zhu HY, Shi WW, Xi TK, Shi J, Fang GM. Robust synthesis of C-terminal cysteine-containing peptide acids through a peptide hydrazide-based strategy. Org Biomol Chem 2020; 17:5698-5702. [PMID: 31135013 DOI: 10.1039/c9ob01114e] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A new robust strategy was reported for the epimerization-free synthesis of C-terminal Cys-containing peptide acids through mercaptoethanol-mediated hydrolysis of peptide thioesters prepared in situ from peptide hydrazides. This simple-to-operate and highly efficient method avoids the use of derivatization reagents for resin modification, thus providing a practical avenue for the preparation of C-terminal Cys-containing peptide acids.
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Affiliation(s)
- Chao Zuo
- School of Life Science, Institute of Health Science and Technology, Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, PR China.
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149
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Bv8-Like Toxin from the Frog Venom of Amolops jingdongensis Promotes Wound Healing via the Interleukin-1 Signaling Pathway. Toxins (Basel) 2019; 12:toxins12010015. [PMID: 31905801 PMCID: PMC7020442 DOI: 10.3390/toxins12010015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 12/25/2019] [Accepted: 12/27/2019] [Indexed: 11/28/2022] Open
Abstract
Prokineticins are highly conserved small peptides family expressed in all vertebrates, which contain a wide spectrum of functions. In this study, a prokineticin homolog (Bv8-AJ) isolated from the venom of frog Amolops jingdongensis was fully characterized. Bv8-AJ accelerated full-thickness wounds healing of mice model by promoting the initiation and the termination of inflammatory phase. Moreover, Bv8-AJ exerted strong proliferative effect on fibroblasts and keratinocytes isolated from newborn mice by activating interleukin (IL)-1 production. Our findings indicate that Bv8 is a potent wound healing regulator and may reveal the mechanism of rapid wound-healing in amphibian skins.
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150
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Hantzschmann AM, Gollmann B, Gollmann G, Sinsch U. The fast-slow continuum of longevity among yellow-bellied toad populations ( Bombina variegata): intrinsic and extrinsic drivers of variation. PeerJ 2019; 7:e8233. [PMID: 31871841 PMCID: PMC6921980 DOI: 10.7717/peerj.8233] [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: 07/26/2019] [Accepted: 11/18/2019] [Indexed: 01/04/2023] Open
Abstract
Yellow-bellied toad populations (Bombina variegata) show a wide fast-slow continuum of the life-history trait longevity ranging from 5 to 23 years. We investigated populations in Germany (n = 8) and Austria (n = 1) to determine their position within the continuum of longevity and the potential drivers of adult survival at the local and the continental scale. Intrinsic and extrinsic factors considered were local weather, nutritional state, allocation of ingested energy to somatic growth, pathogen prevalence, and geographical clines (latitude, altitude, and longitude). Capture-mark-recapture (CMR) monitoring and direct age assessment by skeletochronology allowed for reliable estimates of longevity and adult survival. Raw and corrected recapture rates as well as a probabilistic estimate of the lifespan of the eldest 1% adults of a cohort (CMR data) were used as surrogates for adult survival and thus longevity in a population. Additionally, survival rates were calculated from static life tables based on the age structure (skeletochronological data) of eight populations. Populations in Germany were short-lived with a maximum lifespan of annual cohorts varying from 5 to 8 years, whereas the population in Austria was long-lived with a cohort longevity of 13 to 23 years. We provide evidence that annual survival rates and longevity differ among years and between short- and long-lived populations, but there was no decrease of survival in older toads (i.e. absence of senescence). Variation of weather among years accounted for 90.7% of variance in annual survival rates of short-lived populations, whereas the sources of variation in the long-lived population remained unidentified. At the continental scale, longevity variation among B. variegata populations studied so far did not correspond to geographical clines or climate variation. Therefore, we propose that a population's position within the fast-slow continuum integrates the response to local environmental stochasticity (extrinsic source of variation) and the efficiency of chemical antipredator protection determining the magnitude of longevity (intrinsic source of variation).
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Affiliation(s)
| | - Birgit Gollmann
- Department of Limnology and Bio-Oceanography, University of Vienna, Wien, Austria
| | - Günter Gollmann
- Department of Theoretical Biology, University of Vienna, Wien, Austria
| | - Ulrich Sinsch
- Department of Biology, University of Koblenz-Landau, Koblenz, Germany
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