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Spinelli R, Rietmann Á, Sanchis I, Goicoechea H, Siano Á. Toxicity Evaluation of Anti-cholinesterasic Amphibian Extracts by MTT and an Optimized Artemia salina Test. Chem Biodivers 2024; 21:e202301367. [PMID: 38151826 DOI: 10.1002/cbdv.202301367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 12/19/2023] [Accepted: 12/21/2023] [Indexed: 12/29/2023]
Abstract
The amphibian skin is an important source of bioactive compounds. Recently, our workgroup reported the bioactivity of new extracts from the Hylidae, Microhylidae and Leptodactylidae families against several pathways involved in Alzheimer's disease. However, since cytotoxicity can be a limiting factor for their applicability, we evaluated the toxicity of nine amphibian skin extracts with reported anticholinesterase activity, using the traditional MTT assay and an optimized Artemia salina test. The proposed improvement, guided by experimental design, aims to reduce the amount of biological sample needed. Overall, we proved that the active extracts were non-toxic at effective concentration against cholinesterases (AChE/BChE), positioning the amphibian skin as a promising and preliminary safe source of bioactive compounds in the anti-Alzheimer's treatment. Interestingly, we demonstrated that both toxicity assays can discriminate between toxic and non-toxic samples. We propose the A. salina bioassay as a reliable and cost-effective alternative for early toxicity screening.
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Affiliation(s)
- Roque Spinelli
- Laboratorio de Péptidos Bioactivos (LPB), Departamento de Química Orgánica, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral (UNL), Santa Fe
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Álvaro Rietmann
- Laboratorio de Péptidos Bioactivos (LPB), Departamento de Química Orgánica, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral (UNL), Santa Fe
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Iván Sanchis
- Laboratorio de Péptidos Bioactivos (LPB), Departamento de Química Orgánica, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral (UNL), Santa Fe
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Héctor Goicoechea
- Laboratorio de Desarrollo Analítico y Quimiometría (LADAQ), Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral (UNL), Santa Fe, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Álvaro Siano
- Laboratorio de Péptidos Bioactivos (LPB), Departamento de Química Orgánica, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral (UNL), Santa Fe
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
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2
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Aguilar S, Brunetti AE, Garay AV, Santos LC, Perez LO, Moreira D, Cancelarich NL, Barbosa EA, Basso NG, de Freitas SM, Faivovich J, Brand G, Cabrera GM, Leite JRSA, Marani MM. Structure and function of cationic hylin bioactive peptides from the tree frog Boana pulchella in interaction with lipid membranes. Peptides 2023; 159:170900. [PMID: 36336169 DOI: 10.1016/j.peptides.2022.170900] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 10/27/2022] [Accepted: 10/28/2022] [Indexed: 11/05/2022]
Abstract
Amphibians have a great diversity of bioactive peptides in their skin. The cDNA prepro-peptide sequencing allowed the identification of five novel mature peptides expressed in the skin of Boana pulchella, four with similar sequences to hylin peptides having a cationic amphipathic-helical structure. Whole mature peptides and some of their fragments were chemically-synthesized and tested against Gram-positive and Gram-negative bacterial strains. The mature peptide hylin-Pul3 was the most active, with a MIC= 14 µM against Staphylococcus aureus. Circular dichroism assays indicated that peptides are mostly unstructured in buffer solutions. Still, adding large unilamellar vesicles composed of dimyristoyl phosphatidylcholine and dimyristoylphosphatidylglycerol increased the α-helix content of novel hylins. These results demonstrate the strong influence of the environment on peptide conformation and highlight its significance while addressing the pharmacology of peptides and their biological function in frogs.
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Affiliation(s)
- Silvana Aguilar
- IPEEC-CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas, U9120ACD Puerto Madryn, Argentina
| | - Andrés E Brunetti
- Laboratorio de Genética Evolutiva, Instituto de Biología Subtropical (CONICET-UNaM), Facultad de Ciencias Exactas Químicas y Naturales, Universidad Nacional de Misiones, N3300LQH Posadas, Argentina; Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Departamento de Ciências Biomoleculares, Universidade de São Paulo, 14040-903 Ribeirão Preto, Brazil
| | - Aisel Valle Garay
- Instituto de Ciências Biológicas, Departamento de Biologia Celular, Laboratório de Biofísica Molecular, Universidade de Brasília (UnB), Brasília, DF 70910-900, Brazil
| | - Liem Canet Santos
- Instituto de Ciências Biológicas, Departamento de Biologia Celular, Laboratório de Biofísica Molecular, Universidade de Brasília (UnB), Brasília, DF 70910-900, Brazil
| | - Luis O Perez
- IPCSH-CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas, Puerto Madryn, Argentina
| | - Daniel Moreira
- Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, NuPMIA, Faculdade de Medicina, Universidade de Brasília, UnB, Brasília, 70910-900, Brazil
| | - Natalia L Cancelarich
- IPEEC-CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas, U9120ACD Puerto Madryn, Argentina
| | - Eder Alves Barbosa
- Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, NuPMIA, Faculdade de Medicina, Universidade de Brasília, UnB, Brasília, 70910-900, Brazil
| | - Néstor G Basso
- IDEAus-CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas, U9120ACD Puerto Madryn, Argentina
| | - Sonia Maria de Freitas
- Instituto de Ciências Biológicas, Departamento de Biologia Celular, Laboratório de Biofísica Molecular, Universidade de Brasília (UnB), Brasília, DF 70910-900, Brazil
| | - Julián Faivovich
- División Herpetología, Museo Argentino de Ciencias Naturales 'Bernardino Rivadavia' (CONICET), Buenos Aires, Argentina
| | - Guilherme Brand
- Laboratório de Síntese e Análise de Biomoléculas, LSAB, Instituto de Química, Universidade de Brasília (UnB), Brasília, DF 70910-900, Brazil
| | - Gabriela M Cabrera
- Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Universidad de Buenos Aires, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
| | - José R S A Leite
- Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, NuPMIA, Faculdade de Medicina, Universidade de Brasília, UnB, Brasília, 70910-900, Brazil; Laboratorio de Síntese e Análise de Biomolećulas, Instituto de Química, Universidade de Brasília, Brazil; Laboratorio de Espectrometria de Massa, EMBRAPA Recursos Genéticos e Biotecnología, Brasil, Instituto de Química, Universidade de Brasília, Brazil
| | - Mariela M Marani
- IPEEC-CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas, U9120ACD Puerto Madryn, Argentina.
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3
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Biological Characterization of Natural Peptide BcI-1003 from Boana cordobae (anura): Role in Alzheimer’s Disease and Microbial Infections. Int J Pept Res Ther 2022. [DOI: 10.1007/s10989-022-10472-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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4
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Karlina W, Tjong DH, Roesma DI, Alamsjah F, Fadil MS. Antimicrobial Activity of Fejervarya Skin Secretions (Anura: Dicroglossidae) in West Sumatra, Indonesia. Open Access Maced J Med Sci 2022. [DOI: 10.3889/oamjms.2022.9889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Research on the antimicrobial test of Fejervarya frog skin secretions (Anura: Dicroglossidae) in West Sumatra. This study aimed to analyze the ability of compounds secreted from the skin of F. cancrivora and F. limnocharis in West Sumatra to inhibit the growth of Gram Negative bacteria, Gram Positive bacteria, antibiotics-resistant bacteria and fungi. This study used the diffusion method with paper discs for antimicrobial test of frog skin secretions. Result from this study showed that the skin secretions of F. cancrivora and F. limnocharis in West Sumatra, Indonesia did not show any antimicrobial properties.
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Picturins and Pictuseptins, two novel antimicrobial peptide families from the skin secretions of the Chachi treefrog, Boana picturata. J Proteomics 2022; 264:104633. [DOI: 10.1016/j.jprot.2022.104633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 04/24/2022] [Accepted: 05/16/2022] [Indexed: 11/21/2022]
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6
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Lebedev AT, Vasileva ID, Samgina TY. FT-MS in the de novo top-down sequencing of natural nontryptic peptides. MASS SPECTROMETRY REVIEWS 2022; 41:284-313. [PMID: 33347655 DOI: 10.1002/mas.21678] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 11/25/2020] [Accepted: 11/25/2020] [Indexed: 06/12/2023]
Abstract
The present review covers available results on the application of FT-MS for the de novo sequencing of natural peptides of various animals: cones, bees, snakes, amphibians, scorpions, and so forth. As these peptides are usually bioactive, the animals efficiently use them as a weapon against microorganisms or higher animals including predators. These peptides represent definite interest as drugs of future generations since the mechanism of their activity is completely different in comparison with that of the modern antibiotics. Utilization of those peptides as antibiotics can eliminate the problem of the bacterial resistance development. Sequence elucidation of these bioactive peptides becomes even more challenging when the species genome is not available and little is known about the protein origin and other properties of those peptides in the study. De novo sequencing may be the only option to obtain sequence information. The benefits of FT-MS for the top-down peptide sequencing, the general approaches of the de novxxo sequencing, the difficult cases involving sequence coverage, isobaric and isomeric amino acids, cyclization of short peptides, the presence of posttranslational modifications will be discussed in the review.
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Affiliation(s)
- Albert T Lebedev
- Organic Chemistry Department, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Irina D Vasileva
- Organic Chemistry Department, M.V. Lomonosov Moscow State University, Moscow, Russia
| | - Tatiana Y Samgina
- Organic Chemistry Department, M.V. Lomonosov Moscow State University, Moscow, Russia
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7
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Luong HX, Ngan HD, Thi Phuong HB, Quoc TN, Tung TT. Multiple roles of ribosomal antimicrobial peptides in tackling global antimicrobial resistance. ROYAL SOCIETY OPEN SCIENCE 2022; 9:211583. [PMID: 35116161 PMCID: PMC8790363 DOI: 10.1098/rsos.211583] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 12/20/2021] [Indexed: 05/03/2023]
Abstract
In the last century, conventional antibiotics have played a significant role in global healthcare. Antibiotics support the body in controlling bacterial infection and simultaneously increase the tendency of drug resistance. Consequently, there is a severe concern regarding the regression of the antibiotic era. Despite the use of antibiotics, host defence systems are vital in fighting infectious diseases. In fact, the expression of ribosomal antimicrobial peptides (AMPs) has been crucial in the evolution of innate host defences and has been irreplaceable to date. Therefore, this valuable source is considered to have great potential in tackling the antimicrobial resistance (AMR) crisis. Furthermore, the possibility of bacterial resistance to AMPs has been intensively investigated. Here, we summarize all aspects related to the multiple applications of ribosomal AMPs and their derivatives in combating AMR.
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Affiliation(s)
- Huy Xuan Luong
- Faculty of Pharmacy, PHENIKAA University, Hanoi 12116, Vietnam
- PHENIKAA Institute for Advanced Study (PIAS), PHENIKAA University, Hanoi 12116, Vietnam
| | | | | | - Thang Nguyen Quoc
- Nuclear Medicine Unit, Vinmec Healthcare System, Hanoi 10000, Vietnam
| | - Truong Thanh Tung
- Faculty of Pharmacy, PHENIKAA University, Hanoi 12116, Vietnam
- PHENIKAA Institute for Advanced Study (PIAS), PHENIKAA University, Hanoi 12116, Vietnam
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8
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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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9
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Acetylcholinesterase inhibitory activity of a naturally occurring peptide isolated from Boana pulchella (Anura: Hylidae) and its analogs. Amino Acids 2020; 52:387-396. [DOI: 10.1007/s00726-019-02815-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 12/22/2019] [Indexed: 02/07/2023]
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10
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Húmpola MV, Rey MC, Spontón PG, Simonetta AC, Tonarelli GG. A Comparative Study of the Antimicrobial and Structural Properties of Short Peptides and Lipopeptides Containing a Repetitive Motif KLFK. Protein Pept Lett 2019; 26:192-203. [PMID: 30526450 DOI: 10.2174/0929866526666181208144629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 11/16/2018] [Accepted: 12/04/2018] [Indexed: 11/22/2022]
Abstract
BACKGROUND In the last years, Antimicrobial Peptides (AMPs) and lipopeptides have received attention as promising candidates to treat infections caused by resistant microorganisms. OBJECTIVE The main objective of this study was to investigate the effect of repetitive KLFK motifs and the attachment of aliphatic acids to the N-terminus of (KLFK)n peptides on therapeutic properties. METHODS Minimal inhibitory concentration against Gram (+) and (-) bacteria and yeast of synthetic compounds were determined by broth microtiter dilution method, and the toxicity was evaluated by hemolysis assay. Membrane-peptide interaction studies were performed with model phospholipid membranes mimicking those of bacterial and mammalian cells by Fluorescence Spectroscopy. The secondary structure in solution and membranes was determined by Circular Dichroism. RESULTS Our results showed that the resulting compounds have inhibitory activity against bacteria and fungi. The (KLFK)3 peptide showed the highest therapeutic index against bacterial and yeast strains, and the (KLFK)2 peptide conjugated with octanoic acid was the most active against yeasts. All the lipopeptides containing long-chain fatty acids (C14 or longer) were highly hemolytic at low concentrations. The antimicrobial activity of (KLFK)2 and (KLFK)3 lipopeptides was mainly associated with improved stability of the amphipathic secondary structure, which showed high contributions of α-helix in dipalmitoylphosphatidylglycerol (DPPG) vesicles. CONCLUSION The repetition of the KLFK sequence and the conjugation with lipid tails allowed obtained compounds with high antimicrobial activity and low toxicity, becoming good candidates for treating infectious diseases.
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Affiliation(s)
- María Verónica Húmpola
- Departamento de Quimica Organica, Facultad de Bioquimica y Cs. Biologicas, Universidad Nacional del Litoral (U.N.L), Santa Fe, Argentina
| | - María Carolina Rey
- Departamento de Quimica Organica, Facultad de Bioquimica y Cs. Biologicas, Universidad Nacional del Litoral (U.N.L), Santa Fe, Argentina
| | - Pablo Gabriel Spontón
- Departamento de Quimica Organica, Facultad de Bioquimica y Cs. Biologicas, Universidad Nacional del Litoral (U.N.L), Santa Fe, Argentina.,Catedras de Microbiologia y Biotecnologia, Departamento de Ingenieria en Alimentos, Facultad de Ingenieria Quimica, Universidad Nacional del Litoral, Santa Fe, Argentina
| | - Arturo Carlos Simonetta
- Catedras de Microbiologia y Biotecnologia, Departamento de Ingenieria en Alimentos, Facultad de Ingenieria Quimica, Universidad Nacional del Litoral, Santa Fe, Argentina
| | - Georgina Guadalupe Tonarelli
- Departamento de Quimica Organica, Facultad de Bioquimica y Cs. Biologicas, Universidad Nacional del Litoral (U.N.L), Santa Fe, Argentina
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11
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Siano A, Humpola MV, de Oliveira E, Albericio F, Simonetta AC, Lajmanovich R, Tonarelli GG. Leptodactylus latrans Amphibian Skin Secretions as a Novel Source for the Isolation of Antibacterial Peptides. Molecules 2018; 23:molecules23112943. [PMID: 30423858 PMCID: PMC6278411 DOI: 10.3390/molecules23112943] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Revised: 11/06/2018] [Accepted: 11/09/2018] [Indexed: 12/19/2022] Open
Abstract
Amphibians´ skin produces a diverse array of antimicrobial peptides that play a crucial role as the first line of defense against microbial invasion. Despite the immense richness of wild amphibians in Argentina, current knowledge about the presence of peptides with antimicrobial properties is limited to a only few species. Here we used LC-MS-MS to identify antimicrobial peptides with masses ranging from 1000 to 4000 Da from samples of skin secretions of Leptodactylus latrans (Anura: Leptodactylidae). Three novel amino acid sequences were selected for chemical synthesis and further studies. The three synthetic peptides, named P1-Ll-1577, P2-Ll-1298, and P3-Ll-2085, inhibited the growth of two ATCC strains, namely Escherichia coli and Staphylococcus aureus. P3-Ll-2085 was the most active peptide. In the presence of trifluoroethanol (TFE) and anionic liposomes, it adopted an amphipathic α-helical structure. P2-Ll-1298 showed slightly lower activity than P3-Ll-2085. Comparison of the MIC values of these two peptides revealed that the addition of seven amino acid residues (GLLDFLK) on the N-terminal of P2-Ll-1298 significantly improved activity against both strains. P1-Ll-1577, which remarkably is an anionic peptide, showed interesting antimicrobial activity against E. coli and S. aureus strain, showing marked membrane selectivity and non-hemolysis. Due to this, P1-L1-1577 emerges as a potential candidate for the development of new antibacterial drugs.
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Affiliation(s)
- Alvaro Siano
- Departamento de Química Orgánica, Facultad de Bioquímica y Cs. Biológicas (FBCB), Universidad Nacional del Litoral (UNL), Ciudad Universitaria, 3000 Santa Fe, Argentina.
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 1825 Buenos Aires, Argentina.
| | - Maria Veronica Humpola
- Departamento de Química Orgánica, Facultad de Bioquímica y Cs. Biológicas (FBCB), Universidad Nacional del Litoral (UNL), Ciudad Universitaria, 3000 Santa Fe, Argentina.
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 1825 Buenos Aires, Argentina.
| | - Eliandre de Oliveira
- Proteomics Platform, Barcelona Science Park, Baldiri Reixac 10, 08028 Barcelona, Spain.
| | - Fernando Albericio
- CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine, Barcelona Science Park, Baldiri Reixac 10, 08028 Barcelona, Spain;.
- Department of Organic Chemistry, University of Barcelona, 08028 Barcelona, Spain.
- School of Chemistry and Physics, University of KwaZulu-Natal, 4000 Durban, South Africa.
| | - Arturo C Simonetta
- Cátedras de Microbiología y Biotecnología, Departamento de Ingeniería en Alimentos, Facultad de Ingeniería Química, U.N.L. Santiago del Estero 2829, 3000 Santa Fe, Argentina.
| | - Rafael Lajmanovich
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 1825 Buenos Aires, Argentina.
- Cátedra de Ecotoxicología, Escuela Superior de Sanidad. FBCB, U.N.L. Ciudad Universitaria, 3000 Santa Fe, Argentina.
| | - Georgina G Tonarelli
- Departamento de Química Orgánica, Facultad de Bioquímica y Cs. Biológicas (FBCB), Universidad Nacional del Litoral (UNL), Ciudad Universitaria, 3000 Santa Fe, Argentina.
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12
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Brunetti AE, Marani MM, Soldi RA, Mendonça JN, Faivovich J, Cabrera GM, Lopes NP. Cleavage of Peptides from Amphibian Skin Revealed by Combining Analysis of Gland Secretion and in Situ MALDI Imaging Mass Spectrometry. ACS OMEGA 2018; 3:5426-5434. [PMID: 30023919 PMCID: PMC6044630 DOI: 10.1021/acsomega.7b02029] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 05/03/2018] [Indexed: 06/08/2023]
Abstract
Peptides from skin secretions of amphibians are considered important components of their immune system and also play a relevant role in their defense mechanism against predators. Herein, by using mass spectrometry (MS), we characterize the sequence of 13 peptides from the gland secretion of the hylid tree frog, Boana punctata. Using in situ matrix-assisted laser desorption ionization imaging MS of a transverse section of the skin tissue, we show that some peptides are stored as longer molecules that are cleaved after being secreted, whereas others do not undergo any modification. Sequence comparison with peptides from other Boana species and analysis of the three-dimensional theoretical structure indicate that this cleavage depends on both the presence of a specific sequence motif and the secondary structure. The fact that peptides undergo a rapid cleavage upon secretion suggests that stored and secreted peptides may have distinct roles for anuran survival, including defense against pathogens and predators.
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Affiliation(s)
- Andrés E. Brunetti
- Faculty
of Pharmaceutical Sciences of Ribeirão Preto, Department of
Physics and Chemistry, University of São
Paulo, Avenida do Café,
s/no, 14040-903 Ribeirão Preto, Brazil
- Facultad
de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II, 3° piso, C1428EHA Buenos Aires, Argentina
- División
Herpetología, Museo Argentino de Ciencias Naturales “Bernardino
Rivadavia”, Consejo Nacional de Investigaciones
Científicas y Técnicas (CONICET), Avenue Angel Gallardo 490, C1405DJR Ciudad de Buenos Aires, Argentina
| | - Mariela M. Marani
- IPEEC—CONICET,
Consejo Nacional de Investigaciones Científicas y Técnicas, Bvd. Brown 2915, U9120ACD Puerto Madryn, Argentina
| | - Rafael A. Soldi
- Faculty
of Pharmaceutical Sciences of Ribeirão Preto, Department of
Physics and Chemistry, University of São
Paulo, Avenida do Café,
s/no, 14040-903 Ribeirão Preto, Brazil
| | - Jacqueline Nakau Mendonça
- Faculty
of Pharmaceutical Sciences of Ribeirão Preto, Department of
Physics and Chemistry, University of São
Paulo, Avenida do Café,
s/no, 14040-903 Ribeirão Preto, Brazil
| | - Julián Faivovich
- División
Herpetología, Museo Argentino de Ciencias Naturales “Bernardino
Rivadavia”, Consejo Nacional de Investigaciones
Científicas y Técnicas (CONICET), Avenue Angel Gallardo 490, C1405DJR Ciudad de Buenos Aires, Argentina
- Facultad
de Ciencias Exactas y Naturales, Departamento de Biodiversidad y Biología
Experimental, Universidad de Buenos Aires,
Ciudad Universitaria, Pabellón II, 4° piso, C1428EHA Ciudad de Buenos Aires, Argentina
| | - Gabriela M. Cabrera
- Facultad
de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II, 3° piso, C1428EHA Buenos Aires, Argentina
- Facultad
de Ciencias Exactas y Naturales, Unidad de Microanálisis y
Métodos Físicos aplicados a la Química Orgánica
(UMYMFOR), CONICET—Universidad de
Buenos Aires, Ciudad Universitaria, Pabellón II, 3° piso, C1428EHA Buenos Aires, Argentina
| | - Norberto P. Lopes
- Faculty
of Pharmaceutical Sciences of Ribeirão Preto, Department of
Physics and Chemistry, University of São
Paulo, Avenida do Café,
s/no, 14040-903 Ribeirão Preto, Brazil
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13
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Thakuria D, Shahi N, Singh AK, Khangembam VC, Singh AK, Kumar S. Conformational analysis of a synthetic fish kisspeptin 1 peptide in membrane mimicking environments. PLoS One 2017; 12:e0185892. [PMID: 28977030 PMCID: PMC5627949 DOI: 10.1371/journal.pone.0185892] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 09/21/2017] [Indexed: 11/18/2022] Open
Abstract
Kisspeptin 1 is a neuropeptide hormone of the RFamide family, which act as an upstream regulator of brain-pituitary-gonad (BPG) axis in most vertebrates including teleosts. In the present study, a 16 amino acid long putative mature bioactive peptide (kiss 1) from preprokisspeptin 1 of golden mahseer, Tor putitora (Hamilton, 1822), was synthesized and characterized using an integrated (experimental and in silico) approach. The far-UV circular dichroism (CD) spectrum of this peptide was evaluated both in aqueous and membrane mimicking solvents (TFE, HFIP and Dioxane). The results indicate that kiss 1 peptide adopted helical, turn and β conformations in membrane like environments. The near-UV CD spectroscopy was also carried out to examine the tertiary packing around aromatic residues of kiss 1 peptide and the peptide-membrane complex. The kiss 1 peptide exhibited little signal in water, but a prominent negative band was observed at around 275 nm when membrane mimetic solution was added. The observed ordered conformations of kiss 1 peptide in the different solvents indicated its potential biological activity which could enhance the secretion of gonadotropin-releasing hormone (GnRH) at BPG axis. The conformational information generated from the present study reinforces the application prospects of bioactive synthetic peptide analogs of kisspeptin 1 in improving the reproductive performances of important cultivable fish species.
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Affiliation(s)
- Dimpal Thakuria
- ICAR-Directorate of Coldwater Fisheries Research, Bhimtal, Nainital, Uttarakhand, India
- * E-mail:
| | - Neetu Shahi
- ICAR-Directorate of Coldwater Fisheries Research, Bhimtal, Nainital, Uttarakhand, India
| | - Atul Kumar Singh
- ICAR-Directorate of Coldwater Fisheries Research, Bhimtal, Nainital, Uttarakhand, India
| | | | - Arvind Kumar Singh
- ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttarpradesh, India
| | - Satish Kumar
- ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttarpradesh, India
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14
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Mailho-Fontana PL, Antoniazzi MM, Rodrigues I, Sciani JM, Pimenta DC, Brodie ED, Rodrigues MT, Jared C. Parotoid, radial, and tibial macroglands of the frog Odontophrynus cultripes: Differences and similarities with toads. Toxicon 2017; 129:123-133. [PMID: 28235580 DOI: 10.1016/j.toxicon.2017.02.022] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 02/16/2017] [Accepted: 02/20/2017] [Indexed: 10/20/2022]
Abstract
Anuran integument is characterized by the presence of glands, some of which are responsible for toxin production. In some species these glands accumulate in parts of the body strategically located against predators, forming structures known as macroglands. This is the case for parotoid macroglands, on the dorsum of the head, tibial macroglands, on the rear limbs, and radial macroglands, on the forelimbs of toads and some other anurans. The toad Rhinella jimi, for example, simultaneously displays all three types of macroglands, which is unusual even among bufonids. Interestingly, considering the phylogenetic distance, the frog Odontophrynus cultripes (Odontophrynidae) also presents these three macroglandular types. In this study we analyze the morphology of O. cultripes macroglands and the chemical composition of their poison using an interdisciplinary approach. In this species, the parotoid, tibial, and radial macroglands consist of aggregates of elongated and juxtaposed poison glands, arranged in a honeycomb style, very similar to that of toads. Comparative analysis of these three macrogland types shows significant differences in both the morphology of secretory granules and biochemical composition. The present work on O. cultripes contributes to the evidence that amphibians, or at least anurans, share a basic design for all cutaneous glandular accumulations. The determinant factor for macroglandular formation may be the selective pressure for defense against predators.
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Affiliation(s)
| | | | | | - Juliana M Sciani
- Laboratory of Biochemistry and Biophysics, Instituto Butantan, São Paulo, Brazil
| | | | - Edmund D Brodie
- Department of Biology, Utah State University, Logan, UT, USA.
| | | | - Carlos Jared
- Laboratory of Cell Biology, Instituto Butantan, São Paulo, Brazil
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15
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Siano A, Garibotto FF, Andujar SA, Baldoni HA, Tonarelli GG, Enriz RD. Molecular design and synthesis of novel peptides from amphibians skin acting as inhibitors of cholinesterase enzymes. J Pept Sci 2017; 23:236-244. [DOI: 10.1002/psc.2974] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Revised: 01/05/2017] [Accepted: 01/10/2017] [Indexed: 01/06/2023]
Affiliation(s)
- Alvaro Siano
- Departamento de Química Orgánica, Facultad de Bioquímica y Cs. Biológicas (FBCB); Universidad Nacional del Litoral (UNL), Ciudad Universitaria; 3000 Santa Fe Argentina
| | - Francisco F. Garibotto
- Facultad de Química, Bioquímica y Farmacia; Instituto Multidisciplinario de Investigaciones Biológicas (IMIBIO-SL. CONICET), Universidad Nacional de San Luis; Chacabuco 915 5700 San Luis Argentina
| | - Sebastian A. Andujar
- Facultad de Química, Bioquímica y Farmacia; Instituto Multidisciplinario de Investigaciones Biológicas (IMIBIO-SL. CONICET), Universidad Nacional de San Luis; Chacabuco 915 5700 San Luis Argentina
| | - Hector A. Baldoni
- Facultad de Química, Bioquímica y Farmacia; Instituto de Matemática Aplicada San Luis, Universidad Nacional de San Luis (UNSL, CONICET); Ejército de Los Andes 950 5700 San Luis Argentina
| | - Georgina G. Tonarelli
- Departamento de Química Orgánica, Facultad de Bioquímica y Cs. Biológicas (FBCB); Universidad Nacional del Litoral (UNL), Ciudad Universitaria; 3000 Santa Fe Argentina
| | - Ricardo D. Enriz
- Facultad de Química, Bioquímica y Farmacia; Instituto Multidisciplinario de Investigaciones Biológicas (IMIBIO-SL. CONICET), Universidad Nacional de San Luis; Chacabuco 915 5700 San Luis Argentina
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16
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Húmpola MV, Rey MC, Carballeira NM, Simonetta AC, Tonarelli GG. Biological and structural effects of the conjugation of an antimicrobial decapeptide with saturated, unsaturated, methoxylated and branched fatty acids. J Pept Sci 2016; 23:45-55. [PMID: 28025839 DOI: 10.1002/psc.2958] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 11/18/2016] [Accepted: 11/21/2016] [Indexed: 11/09/2022]
Abstract
The increasing bacterial resistance against conventional antibiotics has led to the search for new antimicrobial drugs with different modes of action. Cationic antimicrobial peptides (AMPs) and lipopeptides are promising candidates to treat infections because they act on bacterial membranes causing rapid destruction of sensitive bacteria. In this study, a decapeptide named A2 (IKQVKKLFKK) was conjugated at the N-terminus with saturated, unsaturated, methoxylated and methyl -branched fatty acids of different chain lengths (C8 - C20), the antimicrobial and structural properties of the lipopeptides being then investigated. The attachment of the fatty acid chain significantly improved the antimicrobial activity of A2 against bacteria, and so, endowed it with moderated antifungal activity against yeast strains belonging to genus Candida. Lipopeptides containing hydrocarbon chain lengths between C8 and C14 were the best antibacterial compounds (MIC = 0.7 to 5.8 μM), while the most active compounds against yeast were A2 conjugated with methoxylated and enoic fatty acids (11.1 to 83.3 μM). The improvement in antimicrobial activity was mainly related to the amphipathic secondary structure adopted by A2 lipopeptides in the presence of vesicles that mimic bacterial membranes. Peptide conjugation with long hydrocarbon chains (C12 or more), regardless of their structure, significantly increased toxicity towards eukaryotic cells, resulting in a loss of selectivity. These findings suggest that A2-derived lipopeptides are potential good candidates for the treatment of infectious diseases caused by bacteria and opportunistic pathogenic yeast belonging to genus Candida. Copyright © 2016 European Peptide Society and John Wiley & Sons, Ltd.
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Affiliation(s)
- María Verónica Húmpola
- Departamento de Química Orgánica, Facultad de Bioquímica y Cs. Biológicas, Universidad Nacional del Litoral, UNL. Ciudad Universitaria, Santa Fe, Argentina
| | - María Carolina Rey
- Departamento de Química Orgánica, Facultad de Bioquímica y Cs. Biológicas, Universidad Nacional del Litoral, UNL. Ciudad Universitaria, Santa Fe, Argentina
| | - Nestor M Carballeira
- Department of Chemistry, University of Puerto Rico, PO Box 23346, San Juan, 00931-3346, Puerto Rico
| | - Arturo Carlos Simonetta
- Cátedras de Microbiología y Biotecnología, Departamento de Ingeniería en Alimentos, Facultad de Ingeniería Química, UNL. Santiago del Estero, 2829, Santa Fe, Argentina
| | - Georgina Guadalupe Tonarelli
- Departamento de Química Orgánica, Facultad de Bioquímica y Cs. Biológicas, Universidad Nacional del Litoral, UNL. Ciudad Universitaria, Santa Fe, Argentina
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17
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Brunetti AE, Hermida GN, Iurman MG, Faivovich J. Odorous secretions in anurans: morphological and functional assessment of serous glands as a source of volatile compounds in the skin of the treefrog Hypsiboas pulchellus (Amphibia: Anura: Hylidae). J Anat 2016; 228:430-42. [PMID: 26555696 PMCID: PMC5341550 DOI: 10.1111/joa.12413] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/09/2015] [Indexed: 11/28/2022] Open
Abstract
Serous (granular or venom) glands occur in the skin of almost all species of adult amphibians, and are thought to be the source of a great diversity of chemical compounds. Despite recent advances in their chemistry, odorous volatile substances are compounds that have received less attention, and until now no study has attempted to associate histological data with the presence of these molecules in amphibians, or in any other vertebrate. Given the recent identification of 40 different volatile compounds from the skin secretions of H. pulchellus (a treefrog species that releases a strong odour when handled), we examined the structure, ultrastructure, histochemistry, and distribution of skin glands of this species. Histological analysis from six body regions reveals the presence of two types of glands that differ in their distribution. Mucous glands are homogeneously distributed, whereas serous glands are more numerous in the scapular region. Ultrastructural results indicate that electron-translucent vesicles observed within granules of serous glands are similar to those found in volatile-producing glands from insects and also with lipid vesicles from different organisms. Association among lipids and volatiles is also evidenced from chemical results, which indicate that at least some of the volatile components in H. pulchellus probably originate within the metabolism of fatty acids or the mevalonate pathway. As odorous secretions are often considered to be secreted under stress situations, the release of glandular content was assessed after pharmacological treatments, epinephrine administrated in vivo and on skin explants, and through surface electrical stimulation. Serous glands responded to all treatments, generally through an obvious contraction of myoepithelial cells that surround their secretory portion. No response was observed in mucous glands. Considering these morpho-functional results, along with previous identification of volatiles from H. pulchellus and H. riojanus after electrical stimulation, we suggest that the electron-translucent inclusions found within the granules of serous glands likely are the store sites of volatile compounds and/or their precursors. Histochemical and glandular distribution analyses in five other species of frogs of the hylid tribe Cophomantini, revealed a high lipid content in all the species, whereas a heterogeneous distribution of serous glands is only observed in species of the H. pulchellus group. The distribution pattern of serous glands in members of this species group, and the odorous volatile secretions are probably related to defensive functions.
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Affiliation(s)
- Andrés E. Brunetti
- División HerpetologíaMuseo Argentino de Ciencias Naturales ‘Bernardino Rivadavia’ – CONICETBuenos AiresArgentina
- Núcleo de Pesquisa em Produtos Naturais e Sintéticos (NPPNS)Departamento de Física e QuímicaFaculdade de Ciências Farmacêuticas de Ribeirão PretoUniversidade de São PauloRibeirão PretoSPBrazil
| | - Gladys N. Hermida
- Laboratorio Biología de Anfibios – Histología AnimalDepartamento de Biodiversidad y Biología ExperimentalFacultad de Ciencias Exactas y NaturalesUniversidad de Buenos Aires, Ciudad UniversitariaBuenos AiresArgentina
| | - Mariana G. Iurman
- Laboratorio Biología de Anfibios – Histología AnimalDepartamento de Biodiversidad y Biología ExperimentalFacultad de Ciencias Exactas y NaturalesUniversidad de Buenos Aires, Ciudad UniversitariaBuenos AiresArgentina
| | - Julián Faivovich
- División HerpetologíaMuseo Argentino de Ciencias Naturales ‘Bernardino Rivadavia’ – CONICETBuenos AiresArgentina
- Departamento de Biodiversidad y Biología ExperimentalFacultad de Ciencias Exactas y NaturalesUniversidad de Buenos Aires, Ciudad UniversitariaBuenos AiresArgentina
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18
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Zats GM, Kovaliov M, Albeck A, Shatzmiller S. Antimicrobial benzodiazepine-based short cationic peptidomimetics. J Pept Sci 2015; 21:512-9. [PMID: 25807936 DOI: 10.1002/psc.2771] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2014] [Revised: 02/11/2015] [Accepted: 02/18/2015] [Indexed: 11/11/2022]
Abstract
Antimicrobial peptides (AMPs) appear to be good candidates for the development of new antibiotic drugs. We describe here the synthesis of peptidomimetic compounds that are based on a benzodiazepine scaffold flanked with positively charged and hydrophobic amino acids. These compounds mimic the essential properties of cationic AMPs. The new design possesses the benzodiazepine scaffold that is comprised of two glycine amino acids and which confers flexibility and aromatic hydrophobic 'back', and two arms used for further synthesis on solid phase for incorporation of charged and hydrophobic amino acids. This approach allowed us a better understanding of the influence of these features on the antimicrobial activity and selectivity. A novel compound was discovered which has MICs of 12.5 µg/ml against Staphylococcus aureus and 25 µg/ml against Escherichia coli, similar to the well-known antimicrobial peptide MSI-78. In contrast to MSI-78, the above mentioned compound has lower lytic effect against mammalian red blood cells. These peptidomimetic compounds will pave the way for future design of potent synthetic mimics of AMPs for therapeutic and biomedical applications.
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Affiliation(s)
- Galina M Zats
- Department of Chemistry, Bar-Ilan University, Ramat Gan, 52900, Israel.,Department of Biological Chemistry, Ariel University, Ariel, 40700, Israel
| | - Marina Kovaliov
- Department of Chemistry, Bar-Ilan University, Ramat Gan, 52900, Israel.,Department of Biological Chemistry, Ariel University, Ariel, 40700, Israel
| | - Amnon Albeck
- Department of Chemistry, Bar-Ilan University, Ramat Gan, 52900, Israel
| | - Shimon Shatzmiller
- Department of Biological Chemistry, Ariel University, Ariel, 40700, Israel
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19
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Identification and characterization of an antimicrobial peptide of Hypsiboas semilineatus (Spix, 1824) (Amphibia, Hylidae). Toxicon 2015; 99:16-22. [PMID: 25772860 DOI: 10.1016/j.toxicon.2015.03.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Revised: 02/28/2015] [Accepted: 03/11/2015] [Indexed: 11/23/2022]
Abstract
The multidrug-resistant bacteria have become a serious problem to public health. In this scenery the antimicrobial peptides (AMPs) derived from animals and plants emerge as a novel therapeutic modality, substituting or in addition to the conventional antimicrobial. The anurans are one of the richest natural sources of AMPs. In this work several cycles of cDNA cloning of the skin of the Brazilian treefrog Hypsiboas semilineatus led to isolation of a precursor sequence that encodes a new AMP. The sequence comprises a 27 residue signal peptide, followed by an acidic intervening sequence that ends in the mature peptide at the carboxy terminal. The AMP, named Hs-1, has 20 amino acids residues, mostly arranged in an alpha helix and with a molecular weight of 2144.6 Da. The chemically synthesized Hs-1 showed an antimicrobial activity against all Gram-positive bacteria tested, with a range of 11-46 μM, but it did not show any effect against Gram-negative bacteria, which suggest that Hs-1 may have a selective action for Gram-positive bacteria. The effects of Hs-1 on bacterial cells were also demonstrated by transmission electron microscopy. Hs-1 is the first AMP to be described from H. semilineatus.
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