RESUMO
The uncontrolled growth and spread of cancerous cells beyond their usual boundaries into surrounding tissues characterizes cancer. In developed countries, cancer is the leading cause of death, while in underdeveloped nations, it ranks second. Using existing cancer diagnostic tools has increased early detection rates, which is crucial for effective cancer treatment. In recent decades, there has been significant progress in cancer-specific survival rates owing to advances in cancer detection and treatment. The ability to accurately identify precursor lesions is a crucial aspect of effective cancer screening programs, as it enables early treatment initiation, leading to lower long-term incidence of invasive cancer and improved overall prognosis. However, these diagnostic methods have limitations, such as high costs and technical challenges, which can make accurate diagnosis of certain deep-seated tumors difficult. To achieve accurate cancer diagnosis and prognosis, it is essential to continue developing cutting-edge technologies in molecular biology and cancer imaging.
Assuntos
Detecção Precoce de Câncer , Neoplasias , Humanos , Detecção Precoce de Câncer/métodos , Neoplasias/diagnóstico , Neoplasias/terapia , Neoplasias/genética , Prognóstico , Biomarcadores Tumorais/genética , Resultado do TratamentoRESUMO
Nuclear paraspeckle assembly transcript 1 (NEAT1) is a long noncoding RNA (lncRNA) that is widely expressed in a variety of mammalian cell types. Altered expression levels of the lncRNA NEAT1 have been reported in liver-related disorders including cancer, fatty liver disease, liver fibrosis, viral hepatitis, and hepatic ischemia. lncRNA NEAT1 mostly acts as a competing endogenous RNA (ceRNA) to sponge various miRNAs (miRs) to regulate different functions. In regard to hepatic cancers, the elevated expression of NEAT1 has been reported to have a relation with the proliferation, migration, angiogenesis, apoptosis, as well as epithelial-mesenchymal transition (EMT) of cancer cells. Furthermore, NEAT1 upregulation has contributed to the pathogenesis of other liver diseases such as fibrosis. In this review, we summarize and discuss the molecular mechanisms by which NEAT1 contributes to liver-related disorders including acute liver failure, nonalcoholic fatty liver disease (NAFLD), liver fibrosis, and liver carcinoma, providing novel insights and introducing NEAT1 as a potential therapeutic target in these diseases.
Assuntos
MicroRNAs , Hepatopatia Gordurosa não Alcoólica , RNA Longo não Codificante , Animais , Humanos , Proliferação de Células/genética , Fibrose , Cirrose Hepática/genética , Mamíferos/genética , Mamíferos/metabolismo , MicroRNAs/genética , MicroRNAs/metabolismo , Hepatopatia Gordurosa não Alcoólica/genética , RNA Longo não Codificante/genética , RNA Longo não Codificante/metabolismoRESUMO
BACKGROUND: Delivery systems with low immunogenicity and toxicity are believed to enhance the efficacy of specific targeted drug delivery to cancer cells. Exosomes are potential natural nanosystems that can enhance the delivery of therapeutic agents for targeted cancer therapy. OBJECTIVE: This study provides a precise effect size of exosomes as nanovesicles for in vitro delivery of anticancer agents. METHODS: In this systematic review and meta-analysis, the efficacy of exosomes as nanocarriers for the delivery of therapeutic molecules was investigated using the random-effects model. We did comprehensive literature searches through CINAHL, Cochrane, PubMed, Scopus, and Science Direct of in vitro studies that reported exosomes as delivery systems for cancer therapy. RESULTS: After the screening of eligible articles, a total of 50 studies were enrolled for the metaanalysis. The results showed that cancer cells treated with exosome-loaded anticancer agents for at least 6 h significantly decreased cell viability and increased cytotoxicity with the standardized mean difference (SMD) of -1.47 (-2.18, -0.76; (p<0.0001) and -1.66 (-2.71, -0.61; p<0.002). Exosomes effectively delivered drugs and exogenous miRNAs, siRNAs, viruses, and enzymes to cancer cells in vitro. CONCLUSION: This meta-analysis provides evidence of exosomes as efficient nanocarriers for the delivery of anticancer drugs.