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1.
J Am Chem Soc ; 146(11): 7274-7287, 2024 Mar 20.
Artigo em Inglês | MEDLINE | ID: mdl-38377953

RESUMO

The utilization of anionic redox chemistry provides an opportunity to further improve the energy density of Li-ion batteries, particularly for Li-rich layered oxides. However, oxygen-based hosts still suffer from unfavorable structural rearrangement, including the oxygen release and transition metal (TM)-ion migration, in association with the tenuous framework rooted in the ionicity of the TM-O bonding. An intrinsic solution, by using a sulfur-based host with strong TM-S covalency, is proposed here to buffer the lattice distortion upon the highly activating sulfur redox process, and it achieves howling success in stabilizing the host frameworks. Experimental results demonstrate the prolonged preservation of the layered sulfur lattice, especially the honeycomb superlattice, during the Li+ extraction/insertion process in contrast to the large structural degeneration in Li-rich oxides. Moreover, the Li-rich sulfide cathodes exhibited a negligible overpotential of 0.08 V and a voltage drop of 0.13 mV/cycle, while maintaining a substantial reversible capacity upon cycling. These superior electrochemical performances can be unambiguously ascribed to the much shorter trajectories of sulfur in comparison to those of oxygen revealed by molecular dynamics simulations at a large scale (∼30 nm) and a long time scale (∼300 ps) via high-dimensional neural network potentials during the delithiation process. Our findings highlight the importance of stabilizing host frameworks and establish general guidance for designing Li-rich cathodes with durable anionic redox chemistry.

2.
Pestic Biochem Physiol ; 200: 105835, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38582597

RESUMO

Octanal was found to be able to reduce green mold incidence in citrus fruit by a defense response mechanism. However, the underlying mechanism remains largely unclear. Herein, the metabolomics, RNA-seq and biochemical analyses were integrated to explore the effect of octanal on disease resistance in harvested citrus fruit. Results showed that octanal fumigation at 40 µL L-1 was effective in controlling citrus green mold. Metabolomics analysis showed that octanal mainly led to the accumulation of some plant hormones including methyl jasmonate, abscisic acid, indole-3-butyric acid, indoleacetic acid (IAA), salicylic acid, and gibberellic acid and many phenylpropanoid metabolites including cinnamyl alcohol, hesperidin, dihydrokaempferol, vanillin, quercetin-3-O-malonylglucoside, curcumin, naringin, chrysin, coniferin, calycosin-7-O-ß-D-glucoside, trans-cinnamaldehyde, and 4',5,7-trihydroxy-3,6-dimethoxyflavone. Particularly, IAA and hesperidin were dramatically accumulated in the peel, which might be the contributors to the resistance response. Additionally, transcriptome analysis showed that octanal greatly activated the biosynthesis and metabolism of aromatic amino acids. This was further verified by the accumulation of some metabolites (shikimic acid, tryptophan, tyrosine, phenylalanine, IAA, total phenolics, flavonoids and lignin), increase in some enzyme activities (phenylalanine ammonia-lyase, tyrosine ammonia-lyase, 4-coumarate CoA ligase, cinnamic acid 4-hydroxylase, polyphenol oxidase, and peroxidase), up-regulation of some genes (tryptophan pyruvate aminotransferase, aldehyde dehydrogenase, shikimate kinase and shikimate dehydrogenase) expressions and molecular docking results. Thus, these results indicate that octanal is an efficient strategy for the control of postharvest green mold by triggering the defense response in citrus fruit.


Assuntos
Aldeídos , Citrus , Hesperidina , Citrus/química , Citrus/genética , Citrus/metabolismo , Aminoácidos Aromáticos/metabolismo , Resistência à Doença , Hesperidina/análise , Hesperidina/metabolismo , Hesperidina/farmacologia , Triptofano/metabolismo , Simulação de Acoplamento Molecular , Frutas
3.
Angew Chem Int Ed Engl ; 63(29): e202405620, 2024 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-38709194

RESUMO

Manganese-based layered oxides are currently of significant interest as cathode materials for sodium-ion batteries due to their low toxicity and high specific capacity. However, the practical applications are impeded by sluggish intrinsic Na+ migration and poor structure stability as a result of Jahn-Teller distortion and complicated phase transition. In this study, a high-entropy strategy is proposed to enhance the high-voltage capacity and cycling stability. The designed P2-Na0.67Mn0.6Cu0.08Ni0.09Fe0.18Ti0.05O2 achieves a deeply desodiation and delivers charging capacity of 158.1 mAh g-1 corresponding to 0.61 Na with a high initial Coulombic efficiency of 98.2 %. The charge compensation is attributed to the cationic and anionic redox reactions conjunctively. Moreover, the crystal structure is effectively stabilized, leading to a slight variation of lattice parameters. This research carries implications for the expedited development of low-cost, high-energy-density cathode materials for sodium-ion batteries.

4.
Int J Mol Sci ; 24(4)2023 Feb 09.
Artigo em Inglês | MEDLINE | ID: mdl-36834940

RESUMO

Although ribosomal RNA processing 15 Homolog (RRP15) has been implicated in the occurrence of various cancers and is considered a potential target for cancer treatment, its significance in colon cancer (CC) is unclear. Thus, this present study aims to determine RRP15 expression and biological function in CC. The results demonstrated a strong expression of RRP15 in CC compared to normal colon specimens, which was correlated with poorer overall survival (OS) and disease-free survival (DFS) of the patients. Among the nine investigated CC cell lines, RRP15 demonstrated the highest and lowest expression in HCT15 and HCT116 cells, respectively. In vitro assays demonstrated that the knockdown of RRP15 inhibited the growth, colony-forming ability and invasive ability of the CC cells whereas its overexpression enhanced the above oncogenic function. Moreover, subcutaneous tumors in nude mice showed that RRP15 knockdown inhibited the CC growth while its overexpression enhanced their growth. Additionally, the knockdown of RRP15 inhibited the epithelial-mesenchymal transition (EMT), whereas overexpression of RRP15 promoted the EMT process in CC. Collectively, inhibition of RRP15 suppressed tumor growth, invasion and EMT of CC, and might be considered a promising therapeutic target for treating CC.


Assuntos
Neoplasias do Colo , Transição Epitelial-Mesenquimal , Proteínas Ribossômicas , Animais , Humanos , Camundongos , Linhagem Celular Tumoral , Movimento Celular/genética , Proliferação de Células/genética , Neoplasias do Colo/genética , Neoplasias do Colo/metabolismo , Neoplasias do Colo/patologia , Transição Epitelial-Mesenquimal/genética , Regulação Neoplásica da Expressão Gênica , Camundongos Nus , Proteínas Ribossômicas/metabolismo , Processamento Pós-Transcricional do RNA , RNA Ribossômico
5.
J Cell Mol Med ; 24(1): 941-953, 2020 01.
Artigo em Inglês | MEDLINE | ID: mdl-31742890

RESUMO

Celastrol, a pentacyclic tritepene extracted from Tripterygium Wilfordi plant, showing potent liver protection effects on several liver-related diseases. However, the anti-inflammatory potential of celastrol in liver fibrosis and the detailed mechanisms remain uncovered. This study was to investigate the anti-inflammatory effect of celastrol in liver fibrosis and to further reveal mechanisms of celastrol-induced anti-inflammatory effects with a focus on AMPK-SIRT3 signalling. Celastrol showed potent ameliorative effects on liver fibrosis both in activated hepatic stellate cells (HSCs) and in fibrotic liver. Celastrol remarkably suppressed inflammation in vivo and inhibited the secretion of inflammatory factors in vitro. Interestingly, celastrol increased SIRT3 promoter activity and SIRT3 expression both in fibrotic liver and in activated HSCs. Furthermore, SIRT3 silencing evidently ameliorated the anti-inflammatory potential of celastrol. Besides, we found that celastrol could increase the AMPK phosphorylation. Further investigation showed that SIRT3 siRNA decreased SIRT3 expression but had no obvious effect on phosphorylation of AMPK. In addition, inhibition of AMPK by employing compound C (an AMPK inhibitor) or AMPK1α siRNA significantly suppressed SIRT3 expression, suggesting that AMPK was an up-stream protein of SIRT3 in liver fibrosis. We further found that depletion of AMPK significantly attenuated the inhibitory effect of celastrol on inflammation. Collectively, celastrol attenuated liver fibrosis mainly through inhibition of inflammation by activating AMPK-SIRT3 signalling, which makes celastrol be a potential candidate compound in treating or protecting against liver fibrosis.


Assuntos
Proteínas Quinases Ativadas por AMP/metabolismo , Anti-Inflamatórios/farmacologia , Regulação da Expressão Gênica/efeitos dos fármacos , Inflamação/tratamento farmacológico , Cirrose Hepática/tratamento farmacológico , Triterpenos Pentacíclicos/farmacologia , Sirtuínas/metabolismo , Proteínas Quinases Ativadas por AMP/genética , Animais , Células Estreladas do Fígado/efeitos dos fármacos , Células Estreladas do Fígado/imunologia , Células Estreladas do Fígado/metabolismo , Inflamação/imunologia , Inflamação/metabolismo , Inflamação/patologia , Cirrose Hepática/imunologia , Cirrose Hepática/metabolismo , Cirrose Hepática/patologia , Masculino , Ratos , Ratos Sprague-Dawley , Sirtuínas/genética
6.
Gen Physiol Biophys ; 38(4): 271-280, 2019 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-31219429

RESUMO

The aim of this study was to investigate the effects of the Rho GDP dissociation inhibitor (RhoGDI) on TGFß1-mediated vascular adventitia myofibroblast transdifferentiation and on the inhibition of ROCK inhibitors. Myofibroblast transdifferentiation and vascular remodeling model were induced by TGFß1 in vitro and by balloon injury in vivo. H&E (Hematoxylin & Eosin) and PSR (Picrosirius Red) staining were used to observe vascular morphology while immunofluorescence, immunohistochemistry, and Western blotting were used to measure protein expression. Fasudil treatment reduced the expression of TGFß1, RhoGDI1, and RhoGDI2 in addition to vascular remodeling in the rat balloon injury model. TGFß1 induced the expression of α-SMA, TGFßRI, phospho-TGFßRI, RhoGDI1, RhoGDI2, and collagen secretion in human aortic adventitial fibroblasts (HAAFs). These effects were diminished after treatment with Y27632. Suppressing both RhoGDI1 and RhoGDI2 expression also blocked TGFß1-induced α-SMA expression and collagen secretion in HAAFs. Moreover, TGFßR inhibition blocked TGFß1-mediated collagen secretion and the expression of α-SMA, RhoGDI1, and RhoGDI2. These data suggested that ROCK inhibitors alleviate myofibroblast transdifferentiation and vascular remodeling by decreasing TGFß1-mediated expression of RhoGDI.


Assuntos
Transdiferenciação Celular/efeitos dos fármacos , Miofibroblastos/citologia , Miofibroblastos/efeitos dos fármacos , Inibidores de Proteínas Quinases/farmacologia , Fator de Crescimento Transformador beta1/metabolismo , Remodelação Vascular/efeitos dos fármacos , Quinases Associadas a rho/antagonistas & inibidores , Inibidores da Dissociação do Nucleotídeo Guanina rho-Específico/biossíntese , Animais , Humanos , Ratos
7.
Cell Physiol Biochem ; 49(2): 565-577, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30165352

RESUMO

BACKGROUND/AIMS: This study used Rho-associated protein kinase (ROCK) isoform-selective suppression or a ROCK inhibitor to analyze the roles of ROCK1 and ROCK2 in regulating endothelial dysfunction triggered by oxidized low-density lipoprotein (oxLDL). METHODS: ROCK1 or ROCK2 expression in human umbilical vein endothelial cells (HUVECs) was suppressed by small interfering RNA (siRNA). HUVECs were pretreated with 30 µM Y27632 (pan ROCK inhibitor) for 30 min before exposure to 200 µg/mL oxLDL for an additional 24 h. Cell viability was determined by the MTT assay, and cell apoptosis was evaluated by the TUNEL assay. Protein expression and phosphorylation were assessed by Western blot analysis. The morphology of total and phosphorylated vimentin (p-vimentin) and the co-localization of vimentin with vascular cell adhesion molecule 1 (VCAM-1) and intercellular adhesion molecule 1 (ICAM-1) were detected by the immunofluorescence assay. The adhesion of promonocytic U937 cells to HUVECs was observed by light microscopy. RESULTS: ROCK2 suppression or Y27632 treatment, rather than ROCK1 deletion, effectively reduced endothelial cell apoptosis and preserved cell survival. ROCK2 suppression exhibited improved vimentin and p-vimentin cytoskeleton stability and decreased vimentin cleavage by attenuating caspase-3 activity. In addition, increased p-vimentin expression induced by oxLDL was significantly inhibited by ROCK2 deletion or Y27632 treatment. In contrast, ROCK1 suppression showed no obvious effects on the vimentin cytoskeleton, but significantly regulated the expression of adhesion molecules. Endothelial ICAM-1 or VCAM-1 expression induced by oxLDL was obviously inhibited by ROCK1 suppression or Y27632 treatment. Moreover, the expression of ICAM-1 induced by oxLDL could also be reduced by ROCK2 suppression. Furthermore, ROCK2 deficiency or Y27632 treatment inhibited the redistribution of adhesion molecules and their co-localization with vimentin caused by oxLDL. These effects resulted in the significant inhibition of monocyte-endothelial adhesion induced by oxLDL. CONCLUSION: The results of this study support the novel concept that ROCK1 is involved in oxLDL-induced cell adhesion by regulating adhesion molecule expression, whereas ROCK2 is required for both endothelial apoptosis and adhesion by regulating both the vimentin cytoskeleton and adhesion molecules. Consequently, ROCK1 and ROCK2 have distinct roles in the regulation of oxLDL-mediated endothelial dysfunction.


Assuntos
Apoptose/efeitos dos fármacos , Lipoproteínas LDL/farmacologia , Quinases Associadas a rho/metabolismo , Amidas/farmacologia , Caspase 3/metabolismo , Adesão Celular/efeitos dos fármacos , Citoesqueleto/metabolismo , Células Endoteliais da Veia Umbilical Humana , Humanos , Molécula 1 de Adesão Intercelular/metabolismo , Monócitos/citologia , Monócitos/metabolismo , Fosforilação/efeitos dos fármacos , Piridinas/farmacologia , Interferência de RNA , RNA Interferente Pequeno/metabolismo , Molécula 1 de Adesão de Célula Vascular/metabolismo , Vimentina/metabolismo , Quinases Associadas a rho/antagonistas & inibidores , Quinases Associadas a rho/genética
8.
Cell Physiol Biochem ; 50(5): 1945-1963, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30396169

RESUMO

BACKGROUND/AIMS: Metastasis is the leading cause resulting in high mortality in triple negative breast cancer (TNBC) patients. Cancer cells are skilled at utilizing thioredoxin (Trx) system as an efficient antioxidant system to counteract oxidative damage, facilitating the occurrence of metastasis. Here, we identified an organosulfur compound named DATS isolated from garlic, that inhibits the expression of Trx-1 and the enzyme activity of Trx reductase in breast cancer cells. METHODS: Tissue microarray of breast cancer patients and immunohistochemical method were used to analyze the role of Trx-1 in breast cancer metastasis. Spotaneous metastasis model and experimental metastasis model combined with HE staining, immunohistochemistry were used to verify in vivo anti-metastatic effect of DATS as well as its regulation on thioredoxin. Western blot, immunofluorescence, redox state assessment and detection of enzyme activity were employed to determine the effect of DATS on thioredoxin system. Trx-1 siRNA interference was used to investigate the conclusive evidence that Trx-1 was the target of DATS. RESULTS: In agreement with reduced Trx-1 nuclear translocation from cytoplasm by DATS, the production of reduced form of Trx-1 was dramatically decreased. Furthermore, in vivo, DATS administration was observed to significantly suppress spontaneous and experimental metastasis in nude mice. Delivery of DATS also resulted in decreased expression of Trx-1 as the direct target, as well as expression of NF-κB and MMP2/9 in primary tumor and lung tissue. Notably, the effects of DATS on the expression of downstream metastasis-associated genes were mediated by Trx-1, as demonstrated by the combination use of DATS and Trx-1 siRNA. CONCLUSION: Collectively, this present study indicates that targeting Trx system with DATS may provide a promising strategy for treating metastasis of TNBC.


Assuntos
Compostos Alílicos/farmacologia , Apoptose/efeitos dos fármacos , Sulfetos/farmacologia , Tiorredoxinas/metabolismo , Neoplasias de Mama Triplo Negativas/patologia , Compostos Alílicos/metabolismo , Compostos Alílicos/uso terapêutico , Animais , Linhagem Celular Tumoral , Movimento Celular/efeitos dos fármacos , Dissulfetos/farmacologia , Feminino , Humanos , Imidazóis/farmacologia , Metástase Linfática , Metaloproteinase 2 da Matriz/metabolismo , Camundongos , Camundongos Endogâmicos BALB C , Camundongos Nus , NF-kappa B/metabolismo , Ligação Proteica , Interferência de RNA , RNA Interferente Pequeno/metabolismo , Sulfetos/metabolismo , Sulfetos/uso terapêutico , Tiorredoxinas/antagonistas & inibidores , Tiorredoxinas/genética , Neoplasias de Mama Triplo Negativas/tratamento farmacológico , Neoplasias de Mama Triplo Negativas/metabolismo , Ensaios Antitumorais Modelo de Xenoenxerto
9.
Org Biomol Chem ; 16(31): 5707-5711, 2018 08 08.
Artigo em Inglês | MEDLINE | ID: mdl-30047973

RESUMO

A new protocol for the direct synthesis of quinolines from enones and 2-aminobenzyl alcohols via iridium-catalyzed transfer hydrogenative reactions has been demonstrated. This method employs easily available [IrCp*Cl2]2/t-BuOK as the efficient catalyst system, proceeding with the merits of high step- and atom efficiency, mild reaction conditions and operational simplicity. The experimental studies suggest that the reactions start with transfer hydrogenation, followed by the Friedländer reaction to give the final products.

10.
J Biochem Mol Toxicol ; 32(11): e22211, 2018 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-30102002

RESUMO

Dexmedetomidine (Dex) is an agonist of α2-adrenergic receptors, and it is used as an anxiety reducing, sedative, and pain medication in clinical. Studies have shown that dexmedetomidine protects against lipopolysaccharide (LPS)-induced acute lung injury; however, the underlying mechanism is still unclear. To investigate, an acute lung injury mouse model was induced by intraperitoneal injection of LPS. Histopathological changes were determined by hematoxylin and eosin staining. Enzyme-linked immunosorbent assay was used to detect cytokines in serum. microRNA expression levels were detected by quantitative reverse transcription polymerase chain reaction. Protein levels were detected by western blot. Dex treatment significantly attenuated lung injury and inhibited the expression levels of the inflammation factors via reducing the level of NACHT, LRR, and PYD domains-containing protein 3 (NLRP3) and autocleavage of caspase-1. Moreover, mmu-miR-381, which targets the mRNA of NLRP3, was upregulated after Dex treatment. Dex attenuates LPS-induced acute lung injury via miR-381-targeted NLRP3.


Assuntos
Lesão Pulmonar Aguda/prevenção & controle , Agonistas de Receptores Adrenérgicos alfa 2/uso terapêutico , Dexmedetomidina/uso terapêutico , Pulmão/efeitos dos fármacos , MicroRNAs/agonistas , Proteína 3 que Contém Domínio de Pirina da Família NLR/antagonistas & inibidores , Interferência de RNA/efeitos dos fármacos , Lesão Pulmonar Aguda/induzido quimicamente , Lesão Pulmonar Aguda/metabolismo , Lesão Pulmonar Aguda/patologia , Animais , Anti-Inflamatórios não Esteroides/uso terapêutico , Caspase 1/metabolismo , Citocinas/sangue , Dexametasona/uso terapêutico , Regulação da Expressão Gênica/efeitos dos fármacos , Lipopolissacarídeos/toxicidade , Pulmão/imunologia , Pulmão/metabolismo , Pulmão/patologia , Masculino , Camundongos Endogâmicos C57BL , MicroRNAs/metabolismo , Proteína 3 que Contém Domínio de Pirina da Família NLR/genética , Proteína 3 que Contém Domínio de Pirina da Família NLR/metabolismo , Substâncias Protetoras/uso terapêutico , Proteólise/efeitos dos fármacos , Edema Pulmonar/prevenção & controle , Distribuição Aleatória
11.
Mol Carcinog ; 56(10): 2317-2331, 2017 10.
Artigo em Inglês | MEDLINE | ID: mdl-28574600

RESUMO

Intratumoral hypoxia promotes the distant metastasis of cancer subclones. The clinical expression level of hypoxia-inducible factor-1α (HIF-1α) reflects the prognosis of a variety of cancers, especially breast cancer. Histone deacetylase (HDAC) inhibitors can target HIF-1α protein due to von Hippel-Lindau (VHL) protein-dependent degradation. Dietary organosulfur compounds, such as those in garlic, have been reported as HDAC inhibitors. The effects of diallyl sulfide (DAS), diallyl disulfide (DADS), and diallyl trisulfide (DATS) on the ratio of firefly/Renilla luciferase activity in hypoxic MDA-MB-231 cells were determined. The mRNA expressions of HIF-1α target genes ANGPTL4, LOXL4, and LOX in hypoxic MDA-MB-231 cells were significantly down-regulated by DATS. DATS attenuated the metastatic potential of MDA-MB-231 cells in hypoxia-induced embryonic zebrafish, xenograft, and orthotopic tumors. Endothelial cell-cancer cell adhesion, wound healing, transwell, and tube formation assays showed that DATS dose-dependently inhibited the migration and angiogenesis of MDA-MB-231 cells in vitro. The expressions of L1CAM, VEGF-A, and EMT-related proteins (Slug, Snail, MMP-2) were inhibited by DATS. DATS dose-dependently inhibited HIF-1α transcriptional activity and hypoxia-induced hematogenous metastasis of MDA-MB-231 cells. It reduced the protein expression of HIF-1α, which did not involve inhibition of HIF-1α mRNA expression or ubiquitin proteasome degradation. Efficient inhibition of HIF-1α expression was required for DATS to resist breast cancer.


Assuntos
Compostos Alílicos/administração & dosagem , Neoplasias da Mama/tratamento farmacológico , Dissulfetos/administração & dosagem , Inibidores de Histona Desacetilases/administração & dosagem , Subunidade alfa do Fator 1 Induzível por Hipóxia/metabolismo , Sulfetos/administração & dosagem , Compostos Alílicos/farmacologia , Animais , Neoplasias da Mama/genética , Neoplasias da Mama/metabolismo , Adesão Celular/efeitos dos fármacos , Linhagem Celular Tumoral , Dissulfetos/farmacologia , Feminino , Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos , Redes Reguladoras de Genes/efeitos dos fármacos , Inibidores de Histona Desacetilases/farmacologia , Humanos , Camundongos , Metástase Neoplásica , Sulfetos/farmacologia , Ensaios Antitumorais Modelo de Xenoenxerto
12.
Mol Carcinog ; 55(10): 1399-410, 2016 10.
Artigo em Inglês | MEDLINE | ID: mdl-26310813

RESUMO

Cryptotanshinone (CT), one major lipophilic component isolated from Salvia miltiorrhiza Bunge, has shown to possess chemopreventive properties against various types of cancer cells. In this study, CT was shown to be a potent anti-angiogenic agent in zebrafish, and mouse models and could limit tumor growth by inhibiting tumor angiogenesis. We further found that CT could inhibit the proliferation, migration, angiogenic sprouting, and tube formation of HUVECs. In addition, we demonstrated that CT could lower the level of TNF-α due to the destabilization of TNF-α mRNA, which associated with regulating 3'-untranslated region (3'-UTR) of TNF-α and preventing the translocation of RNA binding protein, HuR, from the nucleus to the cytoplasm. Moreover, the underlying mechanism responsible for the regulation in angiogenesis by CT was partially related to the suppression of NF-κB, and STAT3 activity. Based on the abilities of CT in targeting tumor cells, inhibiting angiogenesis, and destroying tumor vasculature, CT is worthy of further investigation for preventive, and therapeutic purposes in cancer. © 2015 Wiley Periodicals, Inc.


Assuntos
Inibidores da Angiogênese/administração & dosagem , Proteína Semelhante a ELAV 1/metabolismo , Neoplasias/tratamento farmacológico , Fenantrenos/administração & dosagem , Fator de Necrose Tumoral alfa/genética , Inibidores da Angiogênese/farmacologia , Animais , Linhagem Celular Tumoral , Movimento Celular , Núcleo Celular/efeitos dos fármacos , Núcleo Celular/metabolismo , Proliferação de Células/efeitos dos fármacos , Citoplasma/efeitos dos fármacos , Citoplasma/metabolismo , Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos , Células Endoteliais da Veia Umbilical Humana , Humanos , Camundongos , Fenantrenos/farmacologia , Estabilidade de RNA/efeitos dos fármacos , RNA Mensageiro/efeitos dos fármacos , RNA Mensageiro/metabolismo , Transdução de Sinais/efeitos dos fármacos , Ensaios Antitumorais Modelo de Xenoenxerto , Peixe-Zebra
13.
Med Sci Monit ; 22: 92-8, 2016 Jan 09.
Artigo em Inglês | MEDLINE | ID: mdl-26747243

RESUMO

BACKGROUND: We aimed to evaluate the clinical value of serum albumin levels for the evaluation and prognosis of late preterm infants with infections. MATERIAL/METHODS: This was a retrospective study performed in late preterm infants admitted at the neonatal intensive care unit (NICU) of the Liaocheng People's Hospital between July 2012 and March 2013. Data, including laboratory test results, neonatal critical illness score (NCIS), perinatal complications and prognosis, were analyzed. The newborn infants were divided into 3 groups according to their serum albumin levels, (≥30 g/L, 25-30 g/L and ≤25 g/L for high, moderate, and low, respectively). RESULTS: Among 257 patients, birth weight was 2003±348 g, gestational age was 35.7±2.3 weeks, and 59.1% were male. In addition, 127 (49.4%) were in the low albumin group. There were 32 patients with sepsis, 190 with infections, and 35 without infection, and their rates of hypoalbuminemia were 86.0%, 50.5%, and 30.7%, respectively (P<0.05). Albumin levels of the patients who survived were higher than those of the patients who died. In the low albumin group, the number of individual-event-critical NCIS cases and the frequency of multiple organs injuries were 63.8% and 28.3%, respectively, and were higher than in the 2 other groups. Mortality was higher in patients with sepsis. Hypoalbuminemia was associated with severe adverse outcomes (odds ratio=6.3, 95% confidence interval: 3.7-10.9, P<0.001). CONCLUSIONS: Hypoalbuminemia was frequent among neonates with sepsis. Lower albumin levels might be associated with a poorer prognosis. Albumin levels could be appropriate for the diagnosis and prognosis of late preterm neonates with infections.


Assuntos
Hipoalbuminemia/sangue , Sepse/sangue , Albumina Sérica/química , Peso ao Nascer , Estado Terminal , Feminino , Idade Gestacional , Humanos , Hipoalbuminemia/complicações , Recém-Nascido , Recém-Nascido Prematuro , Unidades de Terapia Intensiva Neonatal , Terapia Intensiva Neonatal , Radioisótopos do Iodo/química , Masculino , Análise Multivariada , Razão de Chances , Pré-Eclâmpsia/sangue , Gravidez , Prognóstico , Estudos Retrospectivos , Sepse/complicações
14.
IUBMB Life ; 67(8): 626-33, 2015 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-26283102

RESUMO

There is mounting evidence that tumor angiogenesis can be regulated by platelets (Plts), which serve as major sources and delivery vehicles of many proangiogenic cytokines including transforming growth factor-ß and vascular endothelial growth factor. Although considerable progress has been made in understanding the role for Plt secretion in tumor angiogenesis, very little is known about the precise mechanisms underlying cancer cell induction of Plt granule release. Here, we demonstrated that nonsmall cell lung cancer (NSCLC) cells directly induced Plt secretion of several angiogenic regulatory cytokines that promoted angiogenesis in concert. Moreover, we discovered that these Plt-derived angiogenesis modulators were regulated by different molecular pathways and could be largely inhibited by combination of multiple signaling inhibitors. Our present studies indicated that manipulation of Plt secretion of angiogenic cytokines without compromising hemostatic functions could provide a novel option for management of tumor angiogenesis and metastasis in NSCLC patients with thrombocytosis.


Assuntos
Plaquetas/metabolismo , Carcinoma Pulmonar de Células não Pequenas/genética , Neovascularização Patológica , Trombocitose/genética , Coagulação Sanguínea/genética , Carcinoma Pulmonar de Células não Pequenas/metabolismo , Carcinoma Pulmonar de Células não Pequenas/patologia , Linhagem Celular Tumoral , Movimento Celular , Citocinas/metabolismo , Células Endoteliais da Veia Umbilical Humana , Humanos , Ativação Plaquetária/genética , Transdução de Sinais/genética , Trombocitose/metabolismo , Trombocitose/patologia , Fator A de Crescimento do Endotélio Vascular/genética , Fator A de Crescimento do Endotélio Vascular/metabolismo
15.
Int Immunopharmacol ; 138: 112580, 2024 Jun 28.
Artigo em Inglês | MEDLINE | ID: mdl-38943970

RESUMO

Acute liver failure is mainly caused by the overdose of acetaminophen (APAP) globally. The traditional Chinese medicinal (TCM) herb, Taraxacum, contains Taraxasterol (TAX) as one of the active components. It is a pentacyclic-triterpene compound isolated from this herb. Present work aimed to investigate the in vitro and in vivo protection effect of TAX in APAP-induced acute liver injury, and determine the potential regulatory mechamisms. The liver injury caused by APAP is attenuated by TAX, as shown by the alleviated pathological changes of mice liver and the reduced serological indexes. TAX evidently controlled the oxidative stress and liver inflammation in mice liver. In vitro studies found that TAX reversed the decrease in LO2 cell viability induced by APAP, and protected LO2 cells from APAP-induced injury. In addition, TAX reduced the secretion of inflammatory factors in RAW264.7 macrophages as induced via APAP. Besides, TAX inhibited oxidative stress in LO2 cells induced by APAP in vitro. Noteworthy, TAX enhanced protein and mRNA expressions of Nrf2 in vivo, and knockdown of Nrf2 by using adeno-associated virus (AAV)-Nrf2-KO attenuated inhibitory impact of TAX in acute liver injury induced by APAP. Also, AAV-NRF2-KO weakened the inhibitory impact of TAX against APAP-triggered liver inflammation and oxidative stress of mice liver. Moreover, TAX activated the Nrf2 signaling in APAP-induced LO2 cells, as shown by the increased nuclear Nrf2 expression together with downstream HO-1 expression in vitro. Inhibition of Nrf2 by using ML-385, anNrf2inhibitor, weakened the inhibitory effect of TAX against APAP-induced oxidative stress and cell injury in LO2 cells. Moreover, inhibition of Nrf2 attenuated anti-inflammatory effect of TAX for APAP-induced RAW264.7 cells. Collectively, TAX could protect against APAP-triggered hepatotoxicitythrough suppression of liver oxidative stress and inflammatory response in mice.

16.
Int J Cancer ; 133(10): 2473-82, 2013 Nov 15.
Artigo em Inglês | MEDLINE | ID: mdl-23649836

RESUMO

Estrogen receptor (ER) and insulin-like growth factor-1 receptor (IGF-1R) signaling are implicated in lung cancer progression. Based on their previous findings, the authors sought to investigate whether estrogen and IGF-1 act synergistically to promote lung adenocarcinoma (LADE) development in mice. LADE was induced with urethane in ovariectomized Kunming mice. Tumor-bearing mice were divided into seven groups: 17ß-estradiol (E2), E2+fulvestrant (Ful; estrogen inhibitor), IGF-1, IGF-1+AG1024 (IGF-1 inhibitor), E2+IGF-1, E2+IGF-1+Ful+AG1024 and control groups. After 14 weeks, the mice were sacrificed, and then the tumor growth was determined. The expression of ERα/ERß, IGF-1, IGF-1R and Ki67 was examined using tissue-microarray-immunohistochemistry, and IGF-1, p-ERß, p-IGF-1R, p-MAPK and p-AKT levels were determined based on Western blot analysis. Fluorescence-quantitative polymerase chain reaction was used to detect the mRNA expression of ERß, ERß2 and IGF-1R. Tumors were found in 93.88% (46/49) of urethane-treated mice, and pathologically proven LADE was noted in 75.51% (37/49). In the E2+IGF-1 group, tumor growth was significantly higher than in the E2 group (p < 0.05), the IGF-1 group (p < 0.05) and control group (p < 0.05). Similarly, the expression of ERß, p-ERß, ERß2, IGF-1, IGF-1R, p-IGF-1R, p-MAPK, p-AKT and Ki67 at the protein and/or mRNA levels was markedly higher in the ligand group than in the ligand + inhibitor groups (all p < 0.05). This study demonstrated for the first time that estrogen and IGF-1 act to synergistically promote the development of LADE in mice, and this may be related to the activation of the MAPK and AKT signaling pathways in which ERß1, ERß2 and IGF-1R play important roles.


Assuntos
Adenocarcinoma/metabolismo , Adenocarcinoma/patologia , Estrogênios/metabolismo , Fator de Crescimento Insulin-Like I/metabolismo , Neoplasias Pulmonares/metabolismo , Neoplasias Pulmonares/patologia , Adenocarcinoma/genética , Adenocarcinoma de Pulmão , Animais , Estrogênios/genética , Feminino , Fator de Crescimento Insulin-Like I/genética , Antígeno Ki-67/genética , Antígeno Ki-67/metabolismo , Neoplasias Pulmonares/genética , Camundongos , Proteínas Quinases Ativadas por Mitógeno/genética , Proteínas Quinases Ativadas por Mitógeno/metabolismo , Proteínas Proto-Oncogênicas c-akt/genética , Proteínas Proto-Oncogênicas c-akt/metabolismo , Receptores de Estrogênio/genética , Receptores de Estrogênio/metabolismo , Transdução de Sinais
17.
Front Nutr ; 10: 1287405, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37899831

RESUMO

With the continuous technological innovation in the high-value utilization of rice bran byproducts, rice bran oil retains a higher concentration of beneficial components such as a well-balanced composition of fatty acids and abundant phytosterols. This makes it a highly nutritious and healthy vegetable oil. This review provides an overview of the advancements made in separating, purifying, and processing phytosterols in rice bran oil. The review also introduces techniques for assessing the stability of rice bran oil. Moreover, the review emphasizes the nutritional value of phytosterols found in rice bran oil, highlighting their various health benefits, including their anticancer, anti-inflammatory, anti-allergic, antibacterial, cholesterol-lowering, skin-protective, anti-obesity, anti-diabetic, neuroprotective, gastroprotective, and immune-enhancing effects. Attaining a comprehensive understanding of the research progress made in phytosterols derived from rice bran oil can offer valuable guidance for the efficient utilization of rice bran.

18.
ACS Cent Sci ; 9(6): 1076-1087, 2023 Jun 28.
Artigo em Inglês | MEDLINE | ID: mdl-37396865

RESUMO

Sodium-ion batteries (SIBs) have been deemed to be a promising energy storage technology in terms of cost-effectiveness and sustainability. However, the electrodes often operate at potentials beyond their thermodynamic equilibrium, thus requiring the formation of interphases for kinetic stabilization. The interfaces of the anode such as typical hard carbons and sodium metals are particularly unstable because of its much lower chemical potential than the electrolyte. This creates more severe challenges for both anode and cathode interfaces when building anode-free cells to achieve higher energy densities. Manipulating the desolvation process through the nanoconfining strategy has been emphasized as an effective strategy to stabilize the interface and has attracted widespread attention. This Outlook provides a comprehensive understanding about the nanopore-based solvation structure regulation strategy and its role in building practical SIBs and anode-free batteries. Finally, guidelines for the design of better electrolytes and suggestions for constructing stable interphases are proposed from the perspective of desolvation or predesolvation.

19.
Int Immunopharmacol ; 123: 110768, 2023 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-37573684

RESUMO

Previous studies have shown that Alisol B 23-acetate (23ABA) had potent liver-protection effects, however, its roles and potential mechanisms in carbon tetrachloride (CCl4)-induced liver fibrosis remain to be determined. The present study aimed to investigate the effects of 23ABA on CCl4-induced liver fibrosis and tried to elucidate the underlying mechanisms by focusing on regulating of farnesoid X receptor (FXR). In vivo study found that 23ABA alleviated the CCl4-induced liver injury, and showed no obvious systemic toxicity on mice. 23ABA inhibited the collagen production, decreased sera levels of hyaluronic acid (HA) and procollagen type III (PC-III), lowered mRNA expression of α-smooth muscle actin (α-SMA), fibronectin, collagen I and collagen III in livers of mice. 23ABA inhibited the mRNA expressions and the sera levels of interleukin-6 (IL-6), IL-1ß, and tumor necrosis factor-α (TNF-α), as well as decreased the expression of cyclooxygenase 2 (COX-2) in fibrotic livers of mice. Besides, 23ABA decreased levels of reactive oxygen species (ROS) and malondialdehyde (MDA), increased glutathione (GSH) level, enhanced activities of superoxide dismutase (SOD) and glutathione reductase (GR) as well as increased mRNA expression of nuclear factor-E2-related factor 2 (Nrf2), glutamate-cysteine ligase, catalytic subunit (GCLC) and glutamate-cysteine ligase, modifier subunit (GCLM). Further study showed that the anti-liver injury and anti-fibrotic effects of 23ABA were abrogated by FXR antagonist guggulsterone (GS) in vivo. In addition, the inhibition effects of 23ABA on liver inflammation and oxidative stress were also weakened by treatment with GS in CCl4-induced fibrotic mice livers. In conclusion, the protective effects of 23ABA against CCl4-induced liver injury and fibrosis, due to FXR-mediated regulation of liver inflammation and oxidative stress.


Assuntos
Tetracloreto de Carbono , Glutamato-Cisteína Ligase , Animais , Camundongos , Anti-Inflamatórios/farmacologia , Tetracloreto de Carbono/efeitos adversos , Fibrose , Glutamato-Cisteína Ligase/metabolismo , Glutationa/metabolismo , Inflamação , Cirrose Hepática/induzido quimicamente , Cirrose Hepática/tratamento farmacológico , Cirrose Hepática/metabolismo , Estresse Oxidativo , RNA Mensageiro/metabolismo
20.
Sci Adv ; 9(44): eadj8171, 2023 Nov 03.
Artigo em Inglês | MEDLINE | ID: mdl-37922354

RESUMO

All-solid-state batteries (ASSBs) represent a promising battery strategy to achieve high energy density with great safety. However, inadequate kinetic property and poor interfacial compatibility remain great challenges, which impede their practical application. A prototype of dual-ion conductor of Li+ synchronized with Cu+ unlocks a four-electron redox reaction with high reversibility and fast kinetics. As a result, the constructed ASSB exhibited a high reversible capacity of 603.0 mA·hour g-1 and an excellent cycling retention of 93.2% over 1500 cycles. Moreover, because of the ion highway connecting active materials and catholytes constructed by dual-ion conductor, remarkable temperature tolerance (-60°C) and excellent rate performance (231.6 mA·hour g-1 at 20 mA cm-2) were achieved. The superior electrochemical performance can be ascribed to the migration pathway with small energy barrier and low tortuosity once the Cu+ introduced into Li6PS5Cl. This work creates a unique perspective of ASSBs with dual-ion conducting strategy, thus inspiring a potential developing strategy of state-of-the-art ASSBs.

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