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Synthetic Peptides and Peptidomimetics: From Basic Science to Biomedical Applications—3rd Edition

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Biochemistry".

Deadline for manuscript submissions: 30 August 2024 | Viewed by 973

Special Issue Editors

Special Issue Information

Dear Colleagues,

Synthetic peptides are gaining increasing interest as both research tools in basic and applied science and as therapeutic and diagnostic agents in clinical settings. Their use as inhibitors of protein–protein interactions is becoming a common practice toward elucidating the binding mode of proteins, advancing our understanding of signaling cascades, and offering a viable contribution to the design and development of new drugs. Synthetic peptides are also ideal ligands for extracellular receptors, acting as potent activators of several cellular pathways such as those of the immune response. To date, about 60 peptides have been approved for human use worldwide, many of which are derived from natural molecules, and hundreds more are progressing through the different stages of clinical trials. However, the poor membrane permeability, short plasma half-life, and scarce oral bioavailability strongly limit their druggability and negatively impact on clinical aspects. In this scenario, novel structural modifications are continuously sought for improving pharmacokinetic properties. Among others, amino acid or backbone modifications and the introduction of non-natural amino acids and conjugation of chemical moieties that extend the half-life, improve cellular uptake, stabilize active conformations, and modulate solubility are constantly proposed. Given the high biocompatibility, generally low toxicity, and functionalization potential, peptides and peptidomimetics are also being increasingly employed to develop new functional biomaterials which are excellent cell culture substrates for medicinal applications or that may act as biorecognition elements for the detection of analytes such as proteins, nucleic acids, and pathogens. In this instance, peptides are also being used as recognition units for chip-based biosensors for clinical diagnosis.

We therefore invite academic and industrial investigators working in all these fields to submit original research articles or reviews describing and discussing the most recent advancements and developments in basic science and biomedical applications.

Potential topics include, but are not limited to:

  • Synthetic peptides and peptidomimetics as protein–protein inhibitors
  • Synthetic procedures for preparing peptides and peptidomimetics
  • Biochemical and biophysical characterization of peptides and peptidomimetics
  • Peptide-based bioconjugation
  • Nanoparticle-conjugated peptides
  • Peptide-based bioreceptors
  • Peptide-based biomaterials

Dr. Nunzianna Doti
Dr. Menotti Ruvo
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. International Journal of Molecular Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. There is an Article Processing Charge (APC) for publication in this open access journal. For details about the APC please see here. Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Published Papers (1 paper)

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Research

10 pages, 1794 KiB  
Article
The Peptide AWRK6 Alleviates Lipid Accumulation in Hepatocytes by Inhibiting miR-5100 Targeting G6PC
by Jiaxin Liu, Ying Liu, Qiuyu Wang, Lili Jin and Dianbao Zhang
Int. J. Mol. Sci. 2023, 24(22), 16141; https://doi.org/10.3390/ijms242216141 - 09 Nov 2023
Viewed by 760
Abstract
Non-alcoholic fatty liver disease (NAFLD) is the leading chronic liver disease, with a worldwide prevalence of more than 25%, and there is no approved drug for NAFLD specifically. In our previous study, the synthetic peptide AWRK6 was found to ameliorate NAFLD in mice. [...] Read more.
Non-alcoholic fatty liver disease (NAFLD) is the leading chronic liver disease, with a worldwide prevalence of more than 25%, and there is no approved drug for NAFLD specifically. In our previous study, the synthetic peptide AWRK6 was found to ameliorate NAFLD in mice. However, the mechanisms involved are still largely unknown. Here, AWRK6 treatment presented an alleviative effect on lipid accumulation induced by oleic acid in hepatocytes. Meanwhile, miR-5100 and miR-505 were found to be elevated by oleic acid induction and reversed by AWRK6 incubation. Further, the miR-5100 inhibitor inhibited oleic acid-induced lipid accumulation, and the alleviation effect of AWRK6 was partially counteracted by miR-5100 mimics. The screening of potential target genes revealed that a catalytic subunit of G6Pase G6PC was significantly inhibited by miR-5100 mimics transfection in both mRNA and protein levels. The direct targeting of miR-5100 on G6PC was verified by a Dual-Luciferase Reporter Assay. Moreover, the mRNA and protein levels of G6PC were found to be significantly increased by AWRK6 treatment. These results suggested that the peptide AWRK6 could alleviate lipid accumulation in hepatocytes, partly through reducing miR-5100 to restore one of its targets: G6PC. Thus, AWRK6 has the potential to treat NAFLD. Additionally, miR-5100 is a mediator of lipid accumulation in hepatocytes, which could be targeted by AWRK6. Full article
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