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Although various chemically synthesized materials are essential in medicine, food, and agriculture, they can exert unexpected side effects on the environment and human health by releasing certain toxic chemicals. Therefore, eco-friendly and biocompatible biomaterials based on natural resources are being actively explored. Recently, biosilica derived from diatoms has attracted attention in various biomedical fields, including drug delivery systems (DDS), due to its uniform porous nano-pattern, hierarchical structure, and abundant silanol functional groups. Importantly, the structural characteristics of diatom biosilica improve the solubility of poorly soluble substances and enable sustained release of loaded drugs. Additionally, diatom biosilica predominantly comprises SiO, has high biocompatibility, and can easily hybridize with other DDS platforms, including hydrogels and cationic DDS, owing to its strong negative charge and abundant silanol groups. This review explores the potential applications of various diatom biosilica-based DDS in various biomedical fields, with a particular focus on hybrid DDS utilizing them.
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http://dx.doi.org/10.3390/pharmaceutics16091171 | DOI Listing |
ACS Nano
July 2025
College of Marine Life Science, Sanya Oceanographic Institute, Ocean University of China, Qingdao, Sanya 266000, China.
Diatom biosilica (DB), derived from the shells of diatoms, is a natural micronano inorganic porous material with excellent properties for protein adsorption that show strong, powerful procoagulant activity. However, the precise mechanism by which DB affects physiological processes in blood has not been elucidated. Herein, we explore DB-initiated blood coagulation at the molecular level, revealing that the selective absorption and protease inhibition behavior induced by the size sieving effect of DB can drive the blood system into a hypercoagulable state.
View Article and Find Full Text PDFMath Biosci
September 2025
Department of Mathematics, University College London, Gower Street, London, WC1E 6BT, UK. Electronic address:
The rapid and complex patterning of biosilica in diatom frustules is of great interest in nanotechnology, although it remains incompletely understood. Specific organic molecules, including long-chain polyamines, silaffins and silacidins, are essential in this process. The molecular structure of synthesized polyamines significantly affects the quantity, size and shape of silica precipitates.
View Article and Find Full Text PDFNanomaterials (Basel)
June 2025
Department of Chemical Engineering, Kwangwoon University, 20 Kwangwoon-ro, Nowon-gu, Seoul 01897, Republic of Korea.
This study investigates the potential use of the freshwater centric diatom as a sustainable source of high-purity biosilica. We analyzed its morphology, microstructure, and optimal culture conditions, and developed a pretreatment method to recover intact biosilica frustules. The isolated diatoms exhibited small and uniform cell sizes (8-10 μm) with distinctive features such as regularly arranged spines, striae, and fultoportulae.
View Article and Find Full Text PDFEnviron Monit Assess
June 2025
Department of Biology, Faculty of Sciences, University of Amar Telidji (UATL), Laghouat, Algeria.
Diatoms, unicellular microalgae with complex siliceous shells, have gained attention due to their many potential uses. They have emerged as a key focus in metabolic engineering, thanks to their distinct silica-based cell walls, which provide advantages over synthetic nanomaterials. Their naturally generated nanoscale architectures combine sustainability, biocompatibility, and intricate porosity, making them ideal for a wide range of applications, such as environmental monitoring, biosensing, and targeted drug administration.
View Article and Find Full Text PDFLangmuir
June 2025
Fujian Provincial Key Laboratory of Innovative Drug Target Research, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, China.
Upon blood contact, biomaterials rapidly adsorb plasma proteins, forming a protein corona that dictates their biological identities and interactions. While diatom biosilica presents a naturally derived, nanostructured platform for biomaterial applications, its interaction with human plasma at the biomolecular level remains unknown. Here, we investigate the formation dynamics and proteomic composition of the protein corona on diatom biosilica.
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