scholarly journals Characterization of a possible uptake mechanism of selective antibacterial peptides.

1970 ◽  
Vol 60 (4) ◽  
Author(s):  
Carlos Polanco ◽  
José Lino Samaniego ◽  
Jorge Alberto Castañón-González ◽  
Thomas Buhse ◽  
Marili Leopold Sordo
Keyword(s):  
Cell Penetrating Peptides ◽  
Antibacterial Peptides ◽  
Amino Acid Residues ◽  
Uptake Mechanism ◽  
Beneficial Effects ◽  
Polarity Index ◽  
Cell Penetrating ◽  
The Subject ◽  
Living Organisms

Selective antibacterial peptides containing less than 30 amino acid residues, cationic, with amphipathic properties, have been the subject of several studies due to their active participation and beneficial effects in strengthening the immune system of all living organisms. This manuscript reports the results of a comparison between the group of selective antibacterial peptides and another group called "cell penetrating peptides". An important number of the selective antibacterial peptides are cell penetrating peptides, suggesting that their toxicity is related to their uptake mechanism. The verification of this observation also includes the adaptation of a method previously published, called Polarity index, which reproduces and confirms the action of this new set of peptides. The efficiency of this method was verified based on four different databases, yielding a high score. The verification was based exclusively on the peptides already reported in the databases which have been experimentally verified.

scholarly journals β-Lactamase Tools for Establishing Cell Internalization and Cytosolic Delivery of Cell Penetrating Peptides

Biomolecules ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. 51 ◽  
Author(s):  
Shane Stone ◽  
Tatjana Heinrich ◽  
Suzy Juraja ◽  
Jiulia Satiaputra ◽  
Clinton Hall ◽  
...  
Keyword(s):  
Functional Characterization ◽  
Cell Penetrating Peptides ◽  
Stable Cell Line ◽  
Intracellular Space ◽  
Biologically Relevant ◽  
Cell Internalization ◽  
Cytosolic Delivery ◽  
Cell Penetrating ◽  
Split Protein

The ability of cell penetrating peptides (CPPs) to deliver biologically relevant cargos into cells is becoming more important as targets in the intracellular space continue to be explored. We have developed two assays based on CPP-dependent, intracellular delivery of TEM-1 β-lactamase enzyme, a functional biological molecule comparable in size to many protein therapeutics. The first assay focuses on the delivery of full-length β-lactamase to evaluate the internalization potential of a CPP sequence. The second assay uses a split-protein system where one component of β-lactamase is constitutively expressed in the cytoplasm of a stable cell line and the other component is delivered by a CPP. The delivery of a split β-lactamase component evaluates the cytosolic delivery capacity of a CPP. We demonstrate that these assays are rapid, flexible and have potential for use with any cell type and CPP sequence. Both assays are validated using canonical and novel CPPs, with limits of detection from <500 nM to 1 µM. Together, the β-lactamase assays provide compatible tools for functional characterization of CPP activity and the delivery of biological cargos into cells.

scholarly journals Internalization mechanisms of cell-penetrating peptides

2020 ◽  
Vol 11 ◽  
pp. 101-123 ◽  
Author(s):  
Ivana Ruseska ◽  
Andreas Zimmer
Keyword(s):  
Cellular Uptake ◽  
Cell Types ◽  
Cell Penetrating Peptides ◽  
Uptake Mechanism ◽  
Black And White ◽  
Cell Penetrating ◽  
Basic Peptides ◽  
Different Cell Types ◽  
Immense Potential

In today’s modern era of medicine, macromolecular compounds such as proteins, peptides and nucleic acids are dethroning small molecules as leading therapeutics. Given their immense potential, they are highly sought after. However, their application is limited mostly due to their poor in vivo stability, limited cellular uptake and insufficient target specificity. Cell-penetrating peptides (CPPs) represent a major breakthrough for the transport of macromolecules. They have been shown to successfully deliver proteins, peptides, siRNAs and pDNA in different cell types. In general, CPPs are basic peptides with a positive charge at physiological pH. They are able to translocate membranes and gain entry to the cell interior. Nevertheless, the mechanism they use to enter cells still remains an unsolved piece of the puzzle. Endocytosis and direct penetration have been suggested as the two major mechanisms used for internalization, however, it is not all black and white in the nanoworld. Studies have shown that several CPPs are able to induce and shift between different uptake mechanisms depending on their concentration, cargo or the cell line used. This review will focus on the major internalization pathways CPPs exploit, their characteristics and regulation, as well as some of the factors that influence the cellular uptake mechanism.

scholarly journals Cell penetrating peptides can exert biological activity: a review

2010 ◽  
Vol 1 (2) ◽  
pp. 109-116 ◽  
Author(s):  
Jamie Brugnano ◽  
Brian C. Ward ◽  
Alyssa Panitch
Keyword(s):  
Gene Expression ◽  
Biological Activity ◽  
Cell Membrane ◽  
Recent Literature ◽  
Cell Types ◽  
Cell Penetrating Peptides ◽  
Cell Penetrating ◽  
Different Cell Types ◽  
Traditional Understanding

AbstractCell penetrating peptides (CPPs) have been successful in delivering cargo into many different cell types and are an important alternative to other methods of permeation that might damage the integrity of the cell membrane. The traditional view of CPPs is that they are inert molecules that can be successfully used to deliver many cargos intracellularly. The goal of this review is to challenge this traditional understanding of CPPs. Recent literature has demonstrated that CPPs themselves can convey biological activity, including the alteration of gene expression and inhibition of protein kinases and proteolytic activity. Further characterization of CPPs is required to determine the extent of this activity. Research into the use of CPPs for intracellular delivery should continue with investigators being aware of these recent results.

scholarly journals Identification and characterization of novel enhanced cell penetrating peptides for anti-cancer cargo delivery

Oncotarget ◽  
2017 ◽  
Vol 9 (5) ◽  
pp. 5944-5957 ◽  
Author(s):  
Xiguang Zhang ◽  
Jean Yves Brossas ◽  
Christophe Parizot ◽  
Jean Marc Zini ◽  
Angelita Rebollo
Keyword(s):  
Cell Penetrating Peptides ◽  
Cargo Delivery ◽  
Anti Cancer ◽  
Cell Penetrating ◽  
Identification And Characterization

scholarly journals Improving Membrane Activity and Cargo Delivery Efficacy of a Cell-Penetrating Peptide by Loading with Carboranes

Pharmaceutics ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 2075
Author(s):  
Tamara Lützenburg ◽  
Nele Burdina ◽  
Matthias S. Scholz ◽  
Ines Neundorf
Keyword(s):  
Secondary Structure ◽  
Cell Penetrating Peptides ◽  
Nucleic Acid Delivery ◽  
Stable Secondary Structure ◽  
Membrane Activity ◽  
Cargo Delivery ◽  
Peptide Interactions ◽  
Cell Penetrating ◽  
A Cell

Cell-penetrating peptides (CPPs) have emerged as versatile tools to increase the intracellular accumulation of different kinds of cargoes. For an efficient cellular uptake and drug delivery, their organization into a distinct and stable secondary structure at the outer surface of the plasma membrane is a hallmark and supports optimal lipid–peptide interactions. Incorporation of hydrophobic moieties, such as carboranes (CBs), has the potential to increase the lipophilicity of peptides, and thus, to facilitate the formation of secondary structures. Herein, we present synthesis and biophysical as well as biological characterization of carborane-CPP conjugates having incorporated one or more CB clusters. Our results highlight the possibility to modulate the secondary structure of CPPs by the addition of CB’s leading to constructs with altered membrane activity and promising use in terms of nucleic acid delivery.

Identification of Uptake Mechanism of Cell-Penetrating Peptides by their Polar Profile

2015 ◽  
Vol 10 (5) ◽  
pp. 586-598 ◽  
Author(s):  
Carlos Polanco ◽  
José Samaniego Mendoza ◽  
Thomas Buhse ◽  
Jorge Alberto Castañón González ◽  
Arturo Gimbel ◽  
...  
Keyword(s):  
Cell Penetrating Peptides ◽  
Uptake Mechanism ◽  
Cell Penetrating

scholarly journals Erratum to “Characterization of Selective Antibacterial Peptides by Polarity Index”

2012 ◽  
Vol 2012 ◽  
pp. 1-2
Author(s):  
C. Polanco ◽  
J. L. Samaniego ◽  
T. Buhse ◽  
F. G. Mosqueira ◽  
A. Negron-Mendoza ◽  
...  
Keyword(s):  
Antibacterial Peptides ◽  
Polarity Index

The world of cell penetrating: the future of medical applications

2020 ◽  
Vol 12 (15) ◽  
pp. 1431-1446 ◽  
Author(s):  
Annarita Falanga ◽  
Lucia Lombardi ◽  
Emilia Galdiero ◽  
Valentina Del Genio ◽  
Stefania Galdiero
Keyword(s):  
Biomedical Applications ◽  
Cell Penetrating Peptides ◽  
Medical Applications ◽  
Critical Factors ◽  
Uptake Mechanism ◽  
Cell Penetrating ◽  
Effective Delivery ◽  
A Cell

Cell-penetrating peptides present huge biomedical applications in a variety of pathologies, thanks to their ability to penetrate membranes and carry a variety of cargoes inside cells. Progress in peptide synthesis has produced a greater availability of virtually any synthetic peptide, increasing their attractiveness. Most molecules when associated to a cell-penetrating peptides can be delivered into a cell, however, understanding of the critical factors influencing the uptake mechanism is of paramount importance to construct nanoplatforms for effective delivery in vitro and in vivo in medical applications. Focus is now on the state-of-art of the mechanisms enabling therapeutics/diagnostics to reach the site target of their activities, and in support of scientists developing platforms for drug delivery and personalized therapies.

scholarly journals Combination of Cell-Penetrating Peptides with Nanoparticles for Therapeutic Application: A Review

Biomolecules ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 22 ◽  
Author(s):  
Sara Silva ◽  
António Almeida ◽  
Nuno Vale
Keyword(s):  
Small Molecules ◽  
Protein Translocation ◽  
Cell Penetrating Peptides ◽  
Amino Acid Residues ◽  
Therapeutic Application ◽  
New Class ◽  
Wide Range ◽  
Cell Penetrating ◽  
Therapeutic Molecules ◽  
Resistant Strains

Cell-penetrating peptides (CPPs), also known as protein translocation domains, membrane translocating sequences or Trojan peptides, are small molecules of 6 to 30 amino acid residues capable of penetrating biological barriers and cellular membranes. Furthermore, CPP have become an alternative strategy to overcome some of the current drug limitations and combat resistant strains since CPPs are capable of delivering different therapeutic molecules against a wide range of diseases. In this review, we address the recent conjugation of CPPs with nanoparticles, which constitutes a new class of delivery vectors with high pharmaceutical potential in a variety of diseases.

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