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  1. Article: Biomaterials Based on Organic Polymers and Layered Double Hydroxides Nanocomposites: Drug Delivery and Tissue Engineering.

    Constantino, Vera Regina Leopoldo / Figueiredo, Mariana Pires / Magri, Vagner Roberto / Eulálio, Denise / Cunha, Vanessa Roberta Rodrigues / Alcântara, Ana Clecia Santos / Perotti, Gustavo Frigi

    Pharmaceutics

    2023  Volume 15, Issue 2

    Abstract: The development of biomaterials has a substantial role in pharmaceutical and medical strategies for the enhancement of life quality. This review work focused on versatile biomaterials based on nanocomposites comprising organic polymers and a class of ... ...

    Abstract The development of biomaterials has a substantial role in pharmaceutical and medical strategies for the enhancement of life quality. This review work focused on versatile biomaterials based on nanocomposites comprising organic polymers and a class of layered inorganic nanoparticles, aiming for drug delivery (oral, transdermal, and ocular delivery) and tissue engineering (skin and bone therapies). Layered double hydroxides (LDHs) are 2D nanomaterials that can intercalate anionic bioactive species between the layers. The layers can hold metal cations that confer intrinsic biological activity to LDHs as well as biocompatibility. The intercalation of bioactive species between the layers allows the formation of drug delivery systems with elevated loading capacity and modified release profiles promoted by ion exchange and/or solubilization. The capacity of tissue integration, antigenicity, and stimulation of collagen formation, among other beneficial characteristics of LDH, have been observed by in vivo assays. The association between the properties of biocompatible polymers and LDH-drug nanohybrids produces multifunctional nanocomposites compatible with living matter. Such nanocomposites are stimuli-responsive, show appropriate mechanical properties, and can be prepared by creative methods that allow a fine-tuning of drug release. They are processed in the end form of films, beads, gels, monoliths etc., to reach orientated therapeutic applications. Several studies attest to the higher performance of polymer/LDH-drug nanocomposite compared to the LDH-drug hybrid or the free drug.
    Language English
    Publishing date 2023-01-26
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2527217-2
    ISSN 1999-4923
    ISSN 1999-4923
    DOI 10.3390/pharmaceutics15020413
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Microplastic contamination in the freshwater shrimp Macrobrachium amazonicum in Itacoatiara, Amazonas, Brazil.

    Dos Anjos Guimarães, Gabriel / de Moraes, Beatriz Rocha / Ando, Rômulo Augusto / Sant'Anna, Bruno Sampaio / Perotti, Gustavo Frigi / Hattori, Gustavo Yomar

    Environmental monitoring and assessment

    2023  Volume 195, Issue 3, Page(s) 434

    Abstract: The present study analyzed the presence of microplastics (MPs) in the shrimp Macrobrachium amazonicum, which is an economically important food that is consumed in several regions of the Brazilian Amazon. A total of 600 specimens of M. amazonicum were ... ...

    Abstract The present study analyzed the presence of microplastics (MPs) in the shrimp Macrobrachium amazonicum, which is an economically important food that is consumed in several regions of the Brazilian Amazon. A total of 600 specimens of M. amazonicum were captured at two sampling sites (urban and rural area). A total of 2597 MP particles were recorded in the shrimps, with a significant difference between the two sites. The presence of MPs in the body parts also differed significantly. No significant difference was found between MPs abundance and sex of the shrimps. The size of the MPs did not differ significantly between the collection sites and between the body parts. Dark blue fiber-type MPs were the most abundant. A positive correlation was observed between the abundance of MPs and the total weight of shrimps. Raman spectroscopy identified the dark blue fibers as polypropylene and the FTIR technique identified the light blue fragments as nylon. The results indicate that the presence of MPs in the M. amazonicum shrimp is associated with the capture sites near the urban area and is present in the diet of the Amazonian population that regularly consumes this crustacean in traditional dishes.
    MeSH term(s) Animals ; Palaemonidae ; Brazil ; Plastics ; Microplastics ; Environmental Monitoring ; Seafood ; Fresh Water
    Chemical Substances Plastics ; Microplastics
    Language English
    Publishing date 2023-03-01
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 782621-7
    ISSN 1573-2959 ; 0167-6369
    ISSN (online) 1573-2959
    ISSN 0167-6369
    DOI 10.1007/s10661-023-11019-w
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Microplastic contamination in the freshwater shrimp Macrobrachium amazonicum in Itacoatiara, Amazonas, Brazil

    dos Anjos Guimarães, Gabriel / de Moraes, Beatriz Rocha / Ando, Rômulo Augusto / Sant’Anna, Bruno Sampaio / Perotti, Gustavo Frigi / Hattori, Gustavo Yomar

    Environ Monit Assess. 2023 Mar., v. 195, no. 3 p.434-434

    2023  

    Abstract: The present study analyzed the presence of microplastics (MPs) in the shrimp Macrobrachium amazonicum, which is an economically important food that is consumed in several regions of the Brazilian Amazon. A total of 600 specimens of M. amazonicum were ... ...

    Abstract The present study analyzed the presence of microplastics (MPs) in the shrimp Macrobrachium amazonicum, which is an economically important food that is consumed in several regions of the Brazilian Amazon. A total of 600 specimens of M. amazonicum were captured at two sampling sites (urban and rural area). A total of 2597 MP particles were recorded in the shrimps, with a significant difference between the two sites. The presence of MPs in the body parts also differed significantly. No significant difference was found between MPs abundance and sex of the shrimps. The size of the MPs did not differ significantly between the collection sites and between the body parts. Dark blue fiber–type MPs were the most abundant. A positive correlation was observed between the abundance of MPs and the total weight of shrimps. Raman spectroscopy identified the dark blue fibers as polypropylene and the FTIR technique identified the light blue fragments as nylon. The results indicate that the presence of MPs in the M. amazonicum shrimp is associated with the capture sites near the urban area and is present in the diet of the Amazonian population that regularly consumes this crustacean in traditional dishes.
    Keywords Macrobrachium ; Raman spectroscopy ; diet ; microplastics ; nylon ; polypropylenes ; rural areas ; shrimp ; urban areas ; Amazonia ; Brazil
    Language English
    Dates of publication 2023-03
    Size p. 434.
    Publishing place Springer International Publishing
    Document type Article ; Online
    ZDB-ID 782621-7
    ISSN 1573-2959 ; 0167-6369
    ISSN (online) 1573-2959
    ISSN 0167-6369
    DOI 10.1007/s10661-023-11019-w
    Database NAL-Catalogue (AGRICOLA)

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