Magnesium oxide nanoparticles (MgO NPs) have emerged as potential materials for various biomedical applications due to their unique physicochemical properties, including biodegradability, biocompatibility, cationic capacity, high stability and redox properties. MgO NPs have become an attractive platform to combat microbes and may be a promising alternative to overcome challenges associated with eliminating microbial biofilms and antibiotic resistance. Hence, due to the increasing use of MgO NPs in biomedicine, new synthetic strategies for MgO NPs are necessary. MgO NPs synthesised using green methods are non-toxic, eco-friendly and have high stability for a wide range of biological, medical and catalytic applications. This review presents the recent advances in biosynthesis strategies of MgO NPs by diverse bio-templates, such as plant, bacterial, fungal and algal extracts. Its photocatalytic properties show a suitable inhibitory function against pathogenic agents, such as microbial proliferation, biofilm formation and fungal growth. Furthermore, MgO NPs and relevant nanocomposites are comprehensively discussed regarding the mechanisms of their effect on microbes, biofilms and fungal strains, as well as challenges and future perspectives.

Cancer is a deadly disease that has long plagued humans and has become more prevalent in recent years. The common treatment modalities for this disease have always faced many problems and complications, and this has led to the discovery of strategies for cancer diagnosis and treatment. The use of magnetic nanoparticles in the past two decades has had a significant impact on this. One of the objectives of the present study is to introduce the special properties of these nanoparticles and how they are structured to load and transport drugs to tumors. In this study, iron oxide (Fe₃O₄) nanoparticles with 6 nm sizes were coated with hyperbranched polyglycerol (HPG) and folic acid (FA). The functionalized nanoparticles (10–20 nm) were less likely to aggregate compared to non-functionalized nanoparticles. [email protected]₃O₄ and [email protected]@Fe₃O₄ nanoparticles were compared in drug loading procedures with curcumin. [email protected]₃O₄ and [email protected]@Fe₃O₄ nanoparticles’ maximal drug-loading capacities were determined to be 82 and 88%, respectively. HeLa cells and mouse L929 fibroblasts treated with nanoparticles took up more [email protected]@Fe₃O₄ nanoparticles than [email protected]₃O₄ nanoparticles. The [email protected]@Fe₃O₄ nanoparticles produced in the current investigation have potential as anticancer drug delivery systems. For the purpose of diagnosis, incubation of HeLa cells with nanoparticles decreased MRI signal enhancement’s percentage and the largest alteration was observed after incubation with [email protected]@Fe₃O₄ nanoparticles.

Hydrogel encapsulation is a promising carrier for cell and drug delivery due to its ability to protect the encapsulated entities from harsh physiological conditions and enhance their therapeutic efficacy and bioavailability. However, there is not yet consensus on the optimal hydrogel type, encapsulation method, and clinical application. Therefore, a systematic review of hydrogel encapsulation techniques and their potential for clinical application is needed to provide a comprehensive and up-to-date overview. In this systematic review, we searched electronic databases for articles published between 2008 and 2023 that described the encapsulation of cells or drug molecules within hydrogels. Herein, we identified 9 relevant studies that met the inclusion and exclusion criteria of our study. Our analysis revealed that the physicochemical properties of the hydrogel, such as its porosity, swelling behavior, and degradation rate, play a critical role in the encapsulation of cells or drug molecules. Furthermore, the encapsulation method, including physical, chemical, or biological methods, can affect the encapsulated entities' stability, bioavailability, and therapeutic efficacy. Challenges of hydrogel encapsulation include poor control over the release of encapsulated entities, limited shelf life, and potential immune responses. Future directions of hydrogel encapsulation include the development of novel hydrogel and encapsulation methods and the integration of hydrogel encapsulation with other technologies, such as 3D printing and gene editing. In conclusion, this review is useful for researchers, clinicians, and policymakers who are interested in this field of drug delivery and regenerative medicine that can serve as a guide for the future development of novel technologies that can be applied into clinical practice.

Considering the remarkable characteristics of nanomaterials, previous research studies investigated the effects of incorporating different types of these materials on improving the concrete properties. However, further studies are required to evaluate the complementary hybridization and synergistic influence of nanomaterials. In this research, the combined effect of adding nano silica particles (NS) and multi-walled carbon nanotubes (MWCNT) on enhancing both the compressive and flexural strengths of the cement paste was investigated. Moreover, the morphology of the interface between cement paste and aggregates was studied by scanning electron microscopy (SEM). The mixtures were prepared using three different portions of MWCNT and NS. Electron microscopy images indicated a uniform distribution of nanoparticles in the cement matrix, enhanced hydration reactions, and increased density. Based on the experiments’ outcomes, the combined utilization of silica and carbon nanomaterials in the cement paste did not necessarily result in the maximum compressive and flexural strengths. Furthermore, it was observed that the use of higher percentages of pristine NS in the absence of MWCNT can lead to further enhancement of strength properties of the cement paste.

MXenes, a burgeoning class of two-dimensional transition metal carbides and nitrides, have emerged as promising candidates for biomedical applications owing to their exceptional physicochemical properties and versatile surface chemistry. This review comprehensively examines the biocompatibility and immunomodulatory behavior of MXenes, with a particular emphasis on their potential in drug delivery systems. We elucidate the critical aspects of MXene–protein interactions, including protein corona formation, cellular uptake pathways, and the influence of surface functionalization on biological interfaces. Special attention is given to the immunological profile of MXenes, exploring their immunogenic potential and immunomodulatory capabilities within therapeutic contexts. Furthermore, we assess the viability of MXenes as nanocarriers for drugs and bioactive compounds, analyzing a wide array of functionalization strategies and stimuli-responsive release mechanisms aimed at enhancing therapeutic efficacy. Despite their immense potential, challenges such as long-term stability, cytotoxicity, and clinical translatability persist. We conclude by outlining these limitations and proposing strategic avenues for future research. This review serves as a vital resource for researchers at the intersection of materials science and biomedicine, particularly those advancing next-generation, two-dimensional nanomaterial-based drug delivery platforms.

Scientists have recommended to investigate graphene and graphene base compounds for their potential uses in a variety of fields, such as biomedicine and drug release. A PEGylated and functionalized magnetic graphene oxide (MG–NH₂–PEG) complex was used herein as a nanocarrier of Doxorubicin, a cancer chemotherapy drug. First, graphene oxide was synthesized by modified Hummer’s method and then functionalized with amine groups (G–NH₂). Afterwards, solvothermal of Fe₃O₄ magnetic nanoparticles on G–NH₂ to prepare magnetic graphene oxide (MGO) modified by MG–NH₂ via covalent bindings for the synthesis of MG–NH₂–PEG. Doxorubicin (DOX) was loaded onto MG–NH₂–PEG at pH 7 by the use of π–π interactions, yielding a highly significant value of DOX's loading efficiency along with its loading content. In vitro cytotoxicity tests on MCF-7 cells line were carried out for MG–NH₂–PEG: DOX according to the drug loading and release characteristics. The results of standard MTT assay for the toxicity determination of both synthetic nanocomposites and the drug revealed over 85% of surviving cells after 48 h, with a cellular uptake of > 80%, suggesting a satisfactory outcome on the non-toxicity of the nanocomposite. It can, therefore, be concluded that MG–NH₂–PEG showed to be an effective drug carrier in cancer chemotherapy drug delivery through loading the above drugs of low medicinal properties with individual dependency on pH levels. Furthermore, MG–NH₂–PEG represent strong optical absorbance from the visible to the near-infrared (NIR) region, and can be utilized for localized photothermal ablation of cancer cells guided by the magnetic field.