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Akintayo DC, Manne SR, de la Torre BG, Li Y, Albericio F. A Practical Peptide Synthesis Workflow Using Amino-Li-Resin. Methods Protoc 2022; 5:mps5050072. [PMID: 36287044 PMCID: PMC9610658 DOI: 10.3390/mps5050072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Revised: 09/14/2022] [Accepted: 09/15/2022] [Indexed: 11/27/2022] Open
Abstract
Herein we report a practical approach for peptide synthesis using second-generation fibrous polyacrylamide resin (Li-resin, “Li” is coming from the name of its inventor, Yongfu Li). This resin with the corresponding handle was used for solid phase peptide synthesis (SPPS) using a fluorenylmethoxycarbonyl (Fmoc) approach. We reveal that the most appropriate mixing and filtration strategy when using amino-Li-resin in SPPS is via shaking and gravity filtration, instead of mechanical stirring and suction filtration used with other resins. The strategy was demonstrated with the SPPS of H-Tyr-Ile-Ile-Phe-Leu-NH2, which contains the difficult sequence Ile-Ile. The peptide was obtained with excellent purity and yield. We are confident that this strategy will be rapidly implemented by other peptide laboratories.
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Affiliation(s)
- Damilola Caleb Akintayo
- Peptide Science Laboratory, School of Chemistry and Physics, University of KwaZulu-Natal, Durban 4000, South Africa
| | - Srinivasa Rao Manne
- Peptide Science Laboratory, School of Chemistry and Physics, University of KwaZulu-Natal, Durban 4000, South Africa
| | - Beatriz G. de la Torre
- KwaZulu-Natal Research Innovation and Sequencing Platform (KRISP), School of Laboratory Medicine and Medical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban 4041, South Africa
- Correspondence: (B.G.d.l.T.); (F.A.)
| | - Yongfu Li
- Biotide Core, LLC, 33815 SE Eastgate Circle, Corvallis, OR 97333, USA
| | - Fernando Albericio
- Peptide Science Laboratory, School of Chemistry and Physics, University of KwaZulu-Natal, Durban 4000, South Africa
- Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), 08034 Barcelona, Spain
- CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine, Department of Organic Chemistry, University of Barcelona, 08028 Barcelona, Spain
- Correspondence: (B.G.d.l.T.); (F.A.)
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Enterocin AS-48 as Evidence for the Use of Bacteriocins as New Leishmanicidal Agents. Antimicrob Agents Chemother 2017; 61:AAC.02288-16. [PMID: 28167557 DOI: 10.1128/aac.02288-16] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 02/02/2017] [Indexed: 11/20/2022] Open
Abstract
We report the feasibility of enterocin AS-48, a circular cationic peptide produced by Enterococcus faecalis, as a new leishmanicidal agent. AS-48 is lethal to Leishmania promastigotes as well as to axenic and intracellular amastigotes at low micromolar concentrations, with scarce cytotoxicity to macrophages. AS-48 induced a fast bioenergetic collapse of L. donovani promastigotes but only a partial permeation of their plasma membrane with limited entrance of vital dyes, even at concentrations beyond its full lethality. Fluoresceinated AS-48 was visualized inside parasites by confocal microscopy and seen to cause mitochondrial depolarization and reactive oxygen species production. Altogether, AS-48 appeared to have a mixed leishmanicidal mechanism that includes both plasma membrane permeabilization and additional intracellular targets, with mitochondrial dysfunctionality being of special relevance. This complex leishmanicidal mechanism of AS-48 persisted even for the killing of intracellular amastigotes, as evidenced by transmission electron microscopy. We demonstrated the potentiality of AS-48 as a new and safe leishmanicidal agent, expanding the growing repertoire of eukaryotic targets for bacteriocins, and our results provide a proof of mechanism for the search of new leishmanicidal bacteriocins, whose diversity constitutes an almost endless source for new structures at moderate production cost and whose safe use on food preservation is well established.
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Molina-Guijarro JM, Macías Á, García C, Muñoz E, García-Fernández LF, David M, Núñez L, Martínez-Leal JF, Moneo V, Cuevas C, Lillo MP, Villalobos Jorge C, Valenzuela C, Galmarini CM. Irvalec inserts into the plasma membrane causing rapid loss of integrity and necrotic cell death in tumor cells. PLoS One 2011; 6:e19042. [PMID: 21556352 PMCID: PMC3083409 DOI: 10.1371/journal.pone.0019042] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2011] [Accepted: 03/23/2011] [Indexed: 11/18/2022] Open
Abstract
Irvalec is a marine-derived antitumor agent currently undergoing phase II clinical trials. In vitro, Irvalec induces a rapid loss of membrane integrity in tumor cells, accompanied of a significant Ca(2+) influx, perturbations of membrane conductivity, severe swelling and the formation of giant membranous vesicles. All these effects are not observed in Irvalec-resistant cells, or are significantly delayed by pretreating the cells with Zn(2+). Using fluorescent derivatives of Irvalec it was demonstrated that the compound rapidly interacts with the plasma membrane of tumor cells promoting lipid bilayer restructuration. Also, FRET experiments demonstrated that Irvalec molecules localize in the cell membrane close enough to each other as to suggest that the compound could self-organize, forming supramolecular structures that likely trigger cell death by necrosis through the disruption of membrane integrity.
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Affiliation(s)
| | - Álvaro Macías
- Instituto de Investigaciones Biomédicas “Alberto Sols” (CSIC-UAM), Madrid, Spain
| | - Carolina García
- Departamento Biofísica, Instituto de Química-Física “Rocasolano” (CSIC), Madrid, Spain
| | - Eva Muñoz
- Instituto de Biología y Genética Molecular (CSIC-UVA), Valladolid, Spain
| | | | - Miren David
- Instituto de Investigaciones Biomédicas “Alberto Sols” (CSIC-UAM), Madrid, Spain
| | - Lucía Núñez
- Instituto de Biología y Genética Molecular (CSIC-UVA), Valladolid, Spain
| | | | - Victoria Moneo
- Departamento de Biología Celular, PharmaMar S.A., Colmenar Viejo, Madrid, Spain
| | - Carmen Cuevas
- Departamento de Biología Celular, PharmaMar S.A., Colmenar Viejo, Madrid, Spain
| | - M. Pilar Lillo
- Departamento Biofísica, Instituto de Química-Física “Rocasolano” (CSIC), Madrid, Spain
| | | | - Carmen Valenzuela
- Instituto de Investigaciones Biomédicas “Alberto Sols” (CSIC-UAM), Madrid, Spain
| | - Carlos M. Galmarini
- Departamento de Biología Celular, PharmaMar S.A., Colmenar Viejo, Madrid, Spain
- * E-mail:
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Kückelhaus SA, Leite JRS, Muniz-Junqueira MI, Sampaio RN, Bloch C, Tosta CE. Antiplasmodial and antileishmanial activities of phylloseptin-1, an antimicrobial peptide from the skin secretion of Phyllomedusa azurea (Amphibia). Exp Parasitol 2009; 123:11-6. [DOI: 10.1016/j.exppara.2009.05.002] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2009] [Revised: 05/05/2009] [Accepted: 05/06/2009] [Indexed: 01/08/2023]
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Interaction studies of diacyl glycerol arginine-based surfactants with DPPC and DMPC monolayers, relation with antimicrobial activity. Colloids Surf A Physicochem Eng Asp 2008. [DOI: 10.1016/j.colsurfa.2007.07.015] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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