Polymer-based drug delivery systems for anticancer drugs: A systematic review.

Recent advances in nanotechnology sciences lead to the development of new treatment approaches for various diseases such as cancer. Nanotechnology advances can potentially minimize the side effects of drugs through the employment of effective and controlled drug delivery systems (DDSs). Polymers are optimal tools providing drug delivery mechanisms through the unique features of pharmacokinetics, circulation time, biocompatibility, and biodegradability. This systematic review aimed to evaluate polymer-based DDSs for anticancer drugs and their various therapeutic applications in cancer treatment. This study was conducted with no time limitation by November 2021. Related articles were collected through a deep search in English and Persian databases of SID, MagIran, Scopus, Web Of Science (WoS), PubMed, Science Direct, and Google Scholar. Keywords included drug delivery system, anticancer agent, polymeric nanostructure-based drug delivery, polymer-based drug delivery, and polymeric system. As the results showed, polymeric nanoparticles (PNPs) have influential roles in cancer treatment than conventional chemotherapy procedures. PNPs can reduce cytotoxicity following chemotherapy drug administration, improve the solubility characteristics of these therapeutic agents and inhibit the rate of tumor growth.

Liposomes, new carriers for delivery of genes and anticancer drugs: a systematic review.

Today, nanoscience has grown and developed in various fields of medicine and treatment, including cancer treatment. Currently, the existing treatments, including chemotherapy and radiotherapy, cause side effects that are unpleasant to the patient. Due to the fact that anticancer drugs cause severe and widespread side effects, liposomes are considered as new drug carriers to minimize the untimely destruction of the drug when it is delivered to the target tissue and to prevent the side effects of toxic drugs. This systematic review study examined the importance of using liposomes as new drug carriers for the delivery of genes and anticancer drugs. The articles published in English in the databases of Google scholar, WoS, PubMed, Embase, Scopus and science direct were reviewed. According to the results of this study, a new targeted nanosystem has been used for loading and delivering anticancer drugs, genes and controlled drug release which has a significant therapeutic effect compared to the same amount of free drug. In general, liposomal systems have been considered because of their capability in preserving the effect of the drug along with reducing the side effects and toxicity of the drug, especially in the case of anticancer drugs. Accumulation of the drug in a target tissue which results in a reduction of the drug entry into other tissues is the main reason for reducing the side effects of these drugs.

Hyaluronic acid-based drug nanocarriers as a novel drug delivery system for cancer chemotherapy: A systematic review.

Chemotherapy is the most common treatment strategy for cancer patients. Nevertheless, limited drug delivery to cancer cells, intolerable toxicity, and multiple drug resistance are constant challenges of chemotherapy. Novel targeted drug delivery strategies by using nanoparticles have attracted much attention due to reducing side effects and increasing drug efficacy. Therefore, the most important outcome of this study is to answer the question of whether active targeted HA-based drug nanocarriers have a significant effect on improving drug delivery to cancer cells.This study aimed to systematically review studies on the use of hyaluronic acid (HA)-based nanocarriers for chemotherapy drugs. The two databases MagIran and SID from Persian databases as well as international databases PubMed, WoS, Scopus, Science Direct, Embase, as well as Google Scholar were searched for human studies and cell lines and/or xenograft mice published without time limit until 2020. Keywords used to search included Nanoparticle, chemotherapy, HA, Hyaluronic acid, traditional medicine, natural medicine, chemotherapeutic drugs, natural compound, cancer treatment, and cancer. The quality of the studies was assessed by the STROBE checklist. Finally, studies consistent with inclusion criteria and with medium- to high-quality were included in the systematic review.According to the findings of studies, active targeted HA-based drug nanocarriers showed a significant effect on improving drug delivery to cancer cells. Also, the use of lipid nanoparticles with a suitable coating of HA have been introduced as biocompatible drug carriers with high potential for targeted drug delivery to the target tissue without affecting other tissues and reducing side effects. Enhanced drug delivery, increased therapeutic efficacy, increased cytotoxicity and significant inhibition of tumor growth, as well as high potential for targeted chemotherapy are also reported to be benefits of using HA-based nanocarriers for tumors with increased expression of CD44 receptor.