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1.
Int J Mol Med ; 48(3)2021 09.
Artigo em Inglês | MEDLINE | ID: mdl-34278450

RESUMO

Endometrial cancer (EC) is widely known as an aggressive malignancy. Due to the limited therapeutic options and poor prognosis of patients with advanced­stage EC, there is a need to identify effective alternative treatments. Chrysin is a naturally active flavonoid (5,7­dihydroxyflavone), which has been demonstrated to exert anticancer effects and may present a novel strategy for EC treatment. However, the role of chrysin in EC remains largely unclear. The aim of the present study was to examine the anticancer effects of chrysin on EC. The results revealed that, in addition to apoptosis, chrysin increased the LC3II expression levels and markedly accelerated the autophagic flux, suggesting that chrysin induced both the autophagy and apoptosis of EC cells. Furthermore, the inhibition of autophagy by chloroquine enhanced the inhibitory effect on cell proliferation and the promotion of the chrysin­induced apoptosis of EC cells, indicating that chrysin­induced autophagy was a cytoprotective mechanism. Additionally, chrysin led to the production of intracellular reactive oxygen species (ROS). N­acetylcysteine (NAC) pretreatment significantly inhibited chrysin­induced autophagy, suggesting that ROS activated autophagy induced by chrysin in EC cells. Furthermore, the phosphorylated (p­)Akt and p­mTOR levels were significantly decreased in a concentration­dependent manner following treatment with chrysin, while NAC blocked these effects. Taken together, these findings demonstrated that chrysin­induced autophagy via the inactivation of the ROS­mediated Akt/mTOR signaling pathway in EC cells.

2.
Oncol Rep ; 44(5): 1787-1798, 2020 11.
Artigo em Inglês | MEDLINE | ID: mdl-33000238

RESUMO

Cervical, ovarian and endometrial cancer are the three most common types of malignant tumor and the leading causes of cancer­associated death in women. Tumor debulking surgery followed by platinum and paclitaxel chemotherapy is the current treatment regime of choice. However, as a result of late diagnosis and chemoresistance, the survival rates of patients with advanced gynecological cancers remains unsatisfactory. Circular RNAs (circRNAs) are stable noncoding RNAs that are present in a wide variety of tissue and cell types. With the enhancement of RNA sequencing methods, increasing numbers of circRNAs have been identified, and their functions are gradually being revealed. In recent years, circRNAs have received increasing attention for their regulatory roles in cervical, ovarian and endometrial cancer. The aim of the present review was to summarize the possible mechanisms of recently identified circRNAs; we hypothesize that a novel diagnostic and therapeutic biomarker may be identified to prolong the survival time of patients with gynecological malignancies.


Assuntos
Biomarcadores Tumorais/análise , Neoplasias do Endométrio/diagnóstico , Neoplasias Ovarianas/diagnóstico , RNA Circular/análise , Neoplasias do Colo do Útero/diagnóstico , Protocolos de Quimioterapia Combinada Antineoplásica/farmacologia , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Biomarcadores Tumorais/metabolismo , Quimioterapia Adjuvante/métodos , Procedimentos Cirúrgicos de Citorredução , Resistencia a Medicamentos Antineoplásicos/genética , Detecção Precoce de Câncer/métodos , Neoplasias do Endométrio/genética , Neoplasias do Endométrio/mortalidade , Neoplasias do Endométrio/terapia , Feminino , Regulação Neoplásica da Expressão Gênica , Humanos , Estadiamento de Neoplasias , Neoplasias Ovarianas/genética , Neoplasias Ovarianas/mortalidade , Neoplasias Ovarianas/terapia , Paclitaxel , Intervalo Livre de Progressão , RNA Circular/metabolismo , Taxa de Sobrevida , Neoplasias do Colo do Útero/genética , Neoplasias do Colo do Útero/mortalidade , Neoplasias do Colo do Útero/terapia
3.
Oncol Lett ; 20(5): 162, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-32934730

RESUMO

Sirtuin 3 (Sirt3) is an important member of the sirtuin protein family. It is a deacetylase that was previously reported to modulate the level of reactive oxygen species (ROS) production and limit the extent of oxidative damage in cellular components. As an important member of the class III type of histone deacetylases, Sirt3 has also been documented to mediate nuclear gene expression, metabolic control, neuroprotection, cell cycle and proliferation. In ovarian cancer (OC), Sirt3 has been reported to regulate cellular metabolism, apoptosis and autophagy. Sirt3 can regulate autophagy through a variety of different molecular signaling pathways, including the p62, 5'AMP-activated protein kinase and mitochondrial ROS-superoxide dismutase pathways. However, autophagy downstream of Sirt3 and its association with OC remains poorly understood. In the present review, the known characteristics of Sirt3 and autophagy were outlined, and their potential functional roles were discussed. Following a comprehensive analysis of the current literature, Sirt3 and autophagy may either serve positive or negative roles in the regulation of OC. Therefore, it is important to identify the appropriate expression level of Sirt3 to control the activation of autophagy in OC cells. This strategy may prove to be a novel therapeutic method to reduce the mortality of patients with OC. Finally, potential research directions into the association between Sirt3 and other signaling pathways were provided.

4.
J Int Med Res ; 48(5): 300060520925352, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-32431202

RESUMO

OBJECTIVE: NOD-like receptor family caspase recruitment domain family domain-containing 5 (NLRC5) is involved in the development of cancer. Our objective was to explore the role of NLRC5 in the progression of endometrial cancer (EC). METHODS: The roles of NLRC5 in migration and invasion of AN3CA EC cells were examined by cell wound-healing assay, Transwell migration, and invasion analysis. Overexpression of NLRC5 was achieved with NLRC5 plasmid, and knockdown of NLRC5 was achieved using small interfering (si)RNA-NLRC5 in AN3CA cells. The expression of NLRC5 was detected by immunohistochemical, western blot, and quantitative real-time PCR. LY294002 was used to inhibit the phosphatidylinositol 3-kinase (PI3K)/AKT signaling pathway. RESULTS: NLRC5 was downregulated in EC tissue compared with normal endometrium. Overexpression of NLRC5 led to upregulation of cell migration and invasion in AN3CA cells and expression of matrix metallopeptidase (MMP)-9. Inhibition of NLRC5 restricted migration and invasion of AN3CA cells and expression of MMP9. Overexpression of NLRC5 promoted the activation of PI3K/AKT signaling pathway. Inhibiting PI3K/AKT signaling pathway by using LY294002 blocked the positive role of NLRC5 in migration and invasion of AN3CA cells and expression of MMP9. CONCLUSIONS: These results demonstrate that NLRC5 promotes EC progression by activating the PI3K/AKT signaling pathway.


Assuntos
Neoplasias do Endométrio/patologia , Peptídeos e Proteínas de Sinalização Intracelular/metabolismo , Linhagem Celular Tumoral , Movimento Celular/efeitos dos fármacos , Proliferação de Células/efeitos dos fármacos , Cromonas/farmacologia , Progressão da Doença , Neoplasias do Endométrio/cirurgia , Endométrio/patologia , Endométrio/cirurgia , Feminino , Humanos , Histerectomia , Metaloproteinase 9 da Matriz/metabolismo , Pessoa de Meia-Idade , Morfolinas/farmacologia , Invasividade Neoplásica/patologia , Fosfatidilinositol 3-Quinases/metabolismo , Inibidores de Fosfoinositídeo-3 Quinase/farmacologia , Proteínas Proto-Oncogênicas c-akt/metabolismo , Transdução de Sinais/efeitos dos fármacos
5.
Small ; 16(23): e2000730, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32406195

RESUMO

Aqueous rechargeable zinc-based batteries have sparked a lot of enthusiasm in the energy storage field recently due to their inherent safety, low cost, and environmental friendliness. Although remarkable progress has been made in the exploration of performance so far, there are still many challenges such as low working voltage and dissolution of electrode materials at the material and system level. Herein, the central tenet is to establish a systematic summary for the construction and mechanism of different aqueous zinc-based batteries. Details for three major zinc-based battery systems, including alkaline rechargeable Zn-based batteries (ARZBs), aqueous Zn ion batteries (AZIBs), and dual-ion hybrid Zn batteries (DHZBs) are given. First, the electrode materials and energy storage mechanism of the three types of zinc-based batteries are discussed to provide universal guidance for these batteries. Then, the electrode behavior of zinc anodes and strategies to deal with problems such as dendrite and passivation are recommended. Finally, some challenge-oriented solutions are provided to facilitate the next development of zinc-based batteries. Combining the characteristics of zinc-based batteries with good use of concepts and ideas from other disciplines will surely pave the way for its commercialization.

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