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Novel Bioinorganic Materials
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Novel Bioinorganic Materials

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

Deadline for manuscript submissions: closed (31 May 2023) | Viewed by 4039

Special Issue Editors

Dr. Lorenzo Lisuzzo

E-Mail Website
Guest Editor
Department of Physics and Chemistry, University of Palermo, Viale delle Scienze, Palermo, Italy
Interests: biohybrids; nanoclays; halloysite nanotubes; bioinorganic materials; catalysis; biomass conversion
Prof. Dr. Stefana Milioto

E-Mail Website
Guest Editor
Dipartimento di Fisica e Chimica, Universita degli Studi di Palermo, Palermo, Italy
Interests: nanocomposites; nanoclay; cultural heritage; drug delivery; halloysite nanotubes; supramolecular chemistry; calorimetry; thermal analysis

Special Issue Information

Dear Colleagues,

Naturally occurring inorganic materials possess many interesting properties, and they are now considered nanomaterials with sustainable features. They offer a wide range of different morphologies at micro- and nano-scale but also a very diverse chemical nature: metal oxides, silica derivatives, aluminum or magnesium silicates, carbonates, noble metal nanoparticles (Pt, Au, Ni, Pd, etc.) or even unprecious metal nanoparticles (Cu, Zn, Fe, V, etc.) are just a few examples. These properties, together with their high availability or ease of preparation, make them suitable for many potential uses. The combination of these materials with some organic counterparts (e.g., polymers, biopolymers, surfactants, biomacromolecules) has been extensively explored to develop biohybrid systems with tunable features and specific functionalities. Recent findings evidenced that novel bioinorganic materials can be employed in anticorrosive and antimicrobial coatings, smart food packaging, drug delivery systems, tissue engineering, reinforced bioplastics, flame retardants and catalysts. Still, fundamental research is needed to clarify structure–property correlations. Synthetic strategies should go in the direction of green chemistry and simple procedures in order to be truly promising in future industrial upscaling.

This Special Issue gathers contributions that represent a step forward in recent studies and pave the way to the use of bioinorganic materials for technological applications.

Dr. Lorenzo Lisuzzo
Prof. Dr. Stefana Milioto
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.

Keywords

  • bioinorganic
  • materials
  • inorganic
  • metals nanoparticles
  • biopolymers
  • clays
  • catalysis
  • bioplastics

Published Papers (3 papers)

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Research

10 pages, 817 KiB  
Article
Evaluation of Solutions Containing Fluoride, Sodium Trimetaphosphate, Xylitol, and Erythritol, Alone or in Different Associations, on Dual-Species Biofilms
by Igor Zen, Alberto Carlos Botazzo Delbem, Tamires Passadori Martins, Leonardo Antônio de Morais, Caio Sampaio, Thayse Yumi Hosida, Douglas Roberto Monteiro and Juliano Pelim Pessan
Int. J. Mol. Sci. 2023, 24(16), 12910; https://doi.org/10.3390/ijms241612910 - 18 Aug 2023
Viewed by 809
Abstract
Although the association of polyols/polyphosphates/fluoride has been demonstrated to promote remarkable effects on dental enamel, little is known on their combined effects on biofilms. This study assessed the effects of solutions containing fluoride/sodium trimetaphosphate (TMP)/xylitol/erythritol on dual-species biofilms of Streptococcus mutans and Candida [...] Read more.
Although the association of polyols/polyphosphates/fluoride has been demonstrated to promote remarkable effects on dental enamel, little is known on their combined effects on biofilms. This study assessed the effects of solutions containing fluoride/sodium trimetaphosphate (TMP)/xylitol/erythritol on dual-species biofilms of Streptococcus mutans and Candida albicans. Biofilms were grown in the continuous presence of these actives alone or in different associations. Quantification of viable plate counts, metabolic activity, biofilm biomass, and extracellular matrix components were evaluated. Overall, fluoride and TMP were the main actives that significantly influenced most of the variables analyzed, with a synergistic effect between them for S. mutans CFUs, biofilm biomass, and protein content of the extracellular matrix (p < 0.05). A similar trend was observed for biofilm metabolic activity and carbohydrate concentrations of the extracellular matrix, although without statistical significance. Regarding the polyols, despite their modest effects on most of the parameters analyzed when administered alone, their co-administration with fluoride and TMP led to a greater reduction in S. mutans CFUs and biofilm biomass compared with fluoride alone at the same concentration. It can be concluded that fluoride and TMP act synergistically on important biofilm parameters, and their co-administration with xylitol/erythritol significantly impacts S. mutans CFUs and biomass reduction. Full article
(This article belongs to the Special Issue Novel Bioinorganic Materials)
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14 pages, 5752 KiB  
Article
Clay Nanotubes Loaded with Diazepam or Xylazine Permeate the Brain through Intranasal Administration in Mice
by Yaswanthi Yanamadala, Mahdi Y. Saleh, Afrika A. Williams, Yuri Lvov and Teresa A. Murray
Int. J. Mol. Sci. 2023, 24(11), 9648; https://doi.org/10.3390/ijms24119648 - 02 Jun 2023
Cited by 1 | Viewed by 1188
Abstract
The blood–brain barrier (BBB) is an obstacle to the permeation of most therapeutic drugs into the brain, limiting treatments for neurological disorders. Drugs loaded within nanocarriers that pass through the BBB can overcome this limitation. Halloysite consists of naturally occurring biocompatible clay nanotubes [...] Read more.
The blood–brain barrier (BBB) is an obstacle to the permeation of most therapeutic drugs into the brain, limiting treatments for neurological disorders. Drugs loaded within nanocarriers that pass through the BBB can overcome this limitation. Halloysite consists of naturally occurring biocompatible clay nanotubes of 50 nm diameter and 15 nm lumen, allowing the loading and sustained release of loaded drugs. These have demonstrated the ability to transport loaded molecules into cells and organs. We propose to use halloysite nanotubes as a “nano-torpedo” for drug delivery through the BBB due to their needle-like shape. To determine if they can cross the BBB using a non-invasive, clinically translatable route of administration, we loaded halloysite with either diazepam or xylazine and delivered these intranasally to mice daily over six days. The sedative effects of these drugs were observed in vestibulomotor tests conducted at two, five, and seven days after the initial administration. Behavioral tests were conducted 3.5 h after administration to show that the effects were from halloysite/delivered drugs and not from the drug alone. As expected, the treated mice performed more poorly than the sham, drug alone, and halloysite-vehicle-treated mice. These results confirm that halloysite permeates the BBB to deliver drugs when administered intranasally. Full article
(This article belongs to the Special Issue Novel Bioinorganic Materials)
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13 pages, 3937 KiB  
Article
Organic–Inorganic Hybrid Pigments Based on Bentonite: Strategies to Stabilize the Quinoidal Base Form of Anthocyanin
by Robson V. Cunha, Alan I. S. Morais, Pollyana Trigueiro, João Sammy N. de Souza, Dihêgo H. L. Damacena, Luciano C. Brandão-Lima, Roosevelt D. S. Bezerra, Maria Gardennia Fonseca, Edson C. Silva-Filho and Josy A. Osajima
Int. J. Mol. Sci. 2023, 24(3), 2417; https://doi.org/10.3390/ijms24032417 - 26 Jan 2023
Cited by 4 | Viewed by 1654
Abstract
Anthocyanins are one of the natural pigments that humanity has employed the most and can substitute synthetic food dyes, which are considered toxic. They are responsible for most purple, blue, and red pigment nuances in tubers, fruits, and flowers. However, they have some [...] Read more.
Anthocyanins are one of the natural pigments that humanity has employed the most and can substitute synthetic food dyes, which are considered toxic. They are responsible for most purple, blue, and red pigment nuances in tubers, fruits, and flowers. However, they have some limitations in light, pH, oxygen, and temperature conditions. Combining biomolecules and inorganic materials such as clay minerals can help to reverse these limitations. The present work aims to produce materials obtained using cetyltrimethylammonium bromide in bentonite clay for incorporation and photostabilization of anthocyanin dye. Characterizations showed that the organic molecules were intercalated between the clay mineral layers, and the dye was successfully incorporated at a different pH. Visible light-driven photostability tests were performed with 200 h of irradiation, confirming that the organic–inorganic matrices were efficient enough to stabilize the quinoidal base form of anthocyanin. The pigment prepared at pH 10 was three-fold more stable than pH 4, showing that the increase in the synthesis pH promotes more stable colors, probably due to the stronger intermolecular interaction obtained under these conditions. Therefore, organobentonite hybrids allow to stabilize the fragile color coming from the quinoidal base form of anthocyanin dyes. Full article
(This article belongs to the Special Issue Novel Bioinorganic Materials)
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