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Diatom-Based Nanomedicine for Colorectal Cancer Treatment: New Approaches for Old Challenges

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MARINE DRUGS
卷 21, 期 5, 页码 -

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MDPI
DOI: 10.3390/md21050266

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chemotherapy; colorectal cancer (CRC); neoplasm metastasis; biosilica; diatoms; nanotechnology; nanomedicine

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Colorectal cancer is a common and deadly cancer worldwide. While screening programs and surgical techniques have reduced mortality in non-metastatic patients, survival rates for metastatic CRC remain low. Conventional chemotherapies cause harmful side effects, but nanomedicine, specifically diatomite nanoparticles, offer a potential solution. These nanoparticles can deliver chemotherapeutic agents to specific targets, reducing off-target effects. This review explores the use of diatomite-based drug delivery systems for the treatment of colorectal cancer, focusing on anti-angiogenetic drugs, antimetastatic drugs, and immune checkpoint inhibitors.
Colorectal cancer is among the most prevalent and lethal cancers globally. To address this emergency, countries have developed diffuse screening programs and innovative surgical techniques with a consequent decrease in mortality rates in non-metastatic patients. However, five years after diagnosis, metastatic CRC is still characterized by less than 20% survival. Most patients with metastatic CRC cannot be surgically treated. For them, the only option is treatment with conventional chemotherapies, which cause harmful side effects in normal tissues. In this context, nanomedicine can help traditional medicine overcome its limits. Diatomite nanoparticles (DNPs) are innovative nano-based drug delivery systems derived from the powder of diatom shells. Diatomite is a porous biosilica largely found in many areas of the world and approved by the Food and Drug Administration (FDA) for pharmaceutical and animal feed formulations. Diatomite nanoparticles with a size between 300 and 400 nm were shown to be biocompatible nanocarriers capable of delivering chemotherapeutic agents against specific targets while reducing off-target effects. This review discusses the treatment of colorectal cancer with conventional methods, highlighting the drawbacks of standard medicine and exploring innovative options based on the use of diatomite-based drug delivery systems. Three targeted treatments are considered: anti-angiogenetic drugs, antimetastatic drugs, and immune checkpoint inhibitors.

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