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1.
Phys Chem Chem Phys ; 26(3): 2529-2538, 2024 Jan 17.
Artigo em Inglês | MEDLINE | ID: mdl-38170813

RESUMO

Stable organic π-conjugated diradcialoids with tunable diradical characters can profoundly affect emerging technology. Over the past years, great efforts have been devoted to studying the structure-diradical character relationship in diradicaloids. Herein, a series of quinoidal isoindigo (IID) compounds with different attached terminal end groups were designed. Detailed analysis focuses on elucidating the driving force for evoking and enhancing the diradical character in the quinoidal IID systems. The arylene units of the IID core and the bridged aromatic units determine the contribution of the open-shell diradical form in the ground state. Diradical character y0 correlates well with bond length alternation (BLA), the total HOMA, and the total NICS(1)zz, and it is tuned by bridged aromatic units and terminal end groups in symmetric systems. The zwitterionic character weakens the diradical character in asymmetric systems to different extents. This work contributes to the deep understanding of evoking and enhancing the diradical character in quinoidal IID-based diradcialoids, providing useful guidelines to produce new molecules with desirable properties.

2.
Molecules ; 29(9)2024 Apr 23.
Artigo em Inglês | MEDLINE | ID: mdl-38731417

RESUMO

In recent years, renewable and sustainable triboelectric nanogenerators have attracted attention due to their high energy conversion rate, and enhancing their functionality further contributes to their applicability across various fields. A pH-sensitive triboelectric nanogenerator (pH-TENG) has been prepared by electrostatic spinning technology, with anthocyanin as the pH indicator and environmentally friendly polyvinyl alcohol (PVA) as the substrate. Among many friction-negative materials, the pH-TENG exhibits the best combination with fluorinated ethylene propylene (FEP) and yields an open-circuit voltage of 62 V, a short-circuit current of 370 nA, and a transferred charge of 21.8 nC. At a frequency of 3 Hz, it can charge a 4.7 µF capacitor to 2 V within 45 s, effectively powering a thermometer. Furthermore, the presence of anthocyanin does not affect the pH-TENG's power generation performance and enables the monitoring of a wide range of environmental pH changes, with an ΔE change of 28.8 ± 7.6. Therefore, pH-TENG prepared with environmentally friendly materials can bring new available materials to the biological and medical fields.

3.
Exp Cell Res ; 386(2): 111741, 2020 01 15.
Artigo em Inglês | MEDLINE | ID: mdl-31759968

RESUMO

Survivin is a newly identified tumour-associated antigen and has been demonstrated to be an excellent target for immunotherapy in several cancers, but its role in hepatocellular carcinoma treatment is still unknown. In this study, survivin-derived peptide-specific cytotoxic T lymphocytes (CTLs) from peripheral blood mononuclear cells of healthy donors were induced by multiple stimulations with HLA-A2- restricted survivin peptide-pulsed T2 cells. The induced CTLs exhibited specific lysis of T2 cells pulsed with the peptide and HLA-A2+ hepatocellular carcinoma cells expressing survivin, while HLA-A2+ hepatocellular carcinoma cell lines that did not express survivin were not recognized by the CTLs. These results suggest that the survivin peptide epitope could be a potential target of specific immunotherapy for HLA-A2+ patients with hepatocellular carcinoma.


Assuntos
Citotoxicidade Imunológica/efeitos dos fármacos , Antígeno HLA-A2/imunologia , Peptídeos/farmacologia , Survivina/imunologia , Linfócitos T Citotóxicos/efeitos dos fármacos , Células Th2/efeitos dos fármacos , Carcinoma Hepatocelular/genética , Carcinoma Hepatocelular/imunologia , Carcinoma Hepatocelular/patologia , Células Cultivadas , ELISPOT , Epitopos/química , Epitopos/imunologia , Expressão Gênica , Antígeno HLA-A2/genética , Voluntários Saudáveis , Células Hep G2 , Humanos , Células K562 , Neoplasias Hepáticas/genética , Neoplasias Hepáticas/imunologia , Neoplasias Hepáticas/patologia , Ativação Linfocitária/efeitos dos fármacos , Peptídeos/química , Peptídeos/imunologia , Survivina/química , Survivina/genética , Linfócitos T Citotóxicos/citologia , Linfócitos T Citotóxicos/imunologia , Células Th2/citologia , Células Th2/imunologia
4.
Biol Reprod ; 102(2): 511-520, 2020 02 14.
Artigo em Inglês | MEDLINE | ID: mdl-31616914

RESUMO

Pentachloronitrobenzene (PCNB) is an organochlorine fungicide widely used for crop production and has become an environmental concern. Little is known about the effect of PCNB on ovarian steroidogenesis and follicular development. We found that PCNB stimulated Star expression and progesterone production in cultured rat granulosa cells in a dose-dependent manner. PCNB activated mitogen-activated protein kinase (MAPK3/1) extracellulat regulated kinase (ERK1/2), thus inhibition of either protein kinase A (PKA) or MAPK3/1 signaling pathway significantly attenuated progesterone biosynthesis caused by PCNB, suggesting that PCNB induced progesterone production by activating the cyclic adenosine monophosphate (cAMP/PKA) and MAPK3/1 signaling pathways. Further investigation demonstrated that PCNB induced Star expression and altered MAPK3/1 signaling in ovary tissues of immature SD rats treated with PCNB at the dose of 100, 200, or 300 mg/kg by daily gavage for 7 days, while serum progesterone level was dose-dependently decreased. We demonstrated that PCNB exposure accelerated the recruitment of primordial follicles into the growing follicle pool in ovary tissues, accompanied by increased levels of anti-Mullerian hormone (AMH) in both ovary tissues and serum. Taken together, our data demonstrate for the first time that PCNB stimulated Star expression, altered MAPK3/1 signaling and progesterone production in vivo and in vitro, and accelerated follicular development with a concomitant increase in AMH in ovary tissues and serum. Our findings provide novel insight into the toxicity of PCNB to animal ovary function.


Assuntos
Células da Granulosa/efeitos dos fármacos , Nitrobenzenos/farmacologia , Folículo Ovariano/efeitos dos fármacos , Ovário/efeitos dos fármacos , Progesterona/biossíntese , Animais , Células Cultivadas , Relação Dose-Resposta a Droga , Feminino , Células da Granulosa/metabolismo , Folículo Ovariano/metabolismo , Ovário/metabolismo , Fosfoproteínas/metabolismo , Ratos , Ratos Sprague-Dawley , Transdução de Sinais/efeitos dos fármacos
5.
J Oral Maxillofac Surg ; 78(6): 986-995, 2020 06.
Artigo em Inglês | MEDLINE | ID: mdl-32006489

RESUMO

PURPOSE: The application of bio-resorbable plates in craniomaxillofacial surgery is increasing because of the advantage of avoiding secondary surgery. This study aimed to evaluate the effects of osteosynthesis with prebent bio-resorbable plates for treating zygomaticomaxillary complex (ZMC) fractures. MATERIALS AND METHODS: We implemented a prospective case series composed of patients with ZMC fractures who underwent treatment at the School of Stomatology at China Medical University. Bio-resorbable plates were used for fracture fixation. The fractures were stabilized with bio-resorbable plates prebent on a 3-dimensionally printed skull model with the fractures reduced using virtual simulation. The primary outcome variable was the stability rate of reduced bone segments. Other study variables were mouth opening, occlusion, paresthesia or anesthesia in the infraorbital nerve region (PAIN), and diplopia. Outcome variables were determined by calculating stability rates of reduced bone segments, resolution rates of postoperative restricted mouth opening, malocclusion, PAIN, and diplopia. RESULTS: The sample was composed of 11 patients recruited between November 2016 and September 2018. All surgical procedures were successful, with no severe complications. The stability rate of reduced bone segments from different mechanical buttress regions was 100%. Satisfactory postoperative stability of bio-resorbable plates was obtained in all cases. The resolution rates of postoperative restricted mouth opening and malocclusion were 75 and 100%, respectively. PAIN and diplopia symptoms resolved in 50 and 100% of cases, respectively. CONCLUSIONS: The results suggest that osteosynthesis with bio-resorbable plates prebent on a 3-dimensionally printed skull model, designed by virtual simulation, works well for patients with ZMC fractures. Future studies should focus on the broader applications of these findings in the practice of oral and maxillofacial surgery.


Assuntos
Fraturas Zigomáticas , Implantes Absorvíveis , Placas Ósseas , China , Fixação Interna de Fraturas , Humanos , Estudos Prospectivos
6.
J Sci Food Agric ; 100(1): 325-334, 2020 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-31584699

RESUMO

BACKGROUND: Meat fraud and adulteration incidents occur frequently in almost all regions of the globe, especially with the increase in the world's population. To ensure the authenticity of meat products, we developed a 10-plex xMAP assay to simultaneously detect ten animal materials: bovine, caprine, poultry, swine, donkey, deer, horse, dog, fox and mink. RESULTS: This method was investigated by analyzing DNA extracts from raw muscle, muscle mixtures, meat products and animal feeds. Our results indicated that the species of interest can be identified, differentiated and detected down to 1 g kg-1 in binary mixtures or 0.01-0.001 ng of genomic DNA from specific species. Testing of 125 commercial samples showed a 97.4% coincidence rate with the method used in routine testing in our lab. CONCLUSION: These results indicated that the method established in this study could detect ten animal materials simultaneously within 3 h, which provides a new, useful tool for animal ingredient analysis in meat products and animal feeds. © 2019 Society of Chemical Industry.


Assuntos
DNA Mitocondrial/genética , Contaminação de Alimentos/análise , Produtos da Carne/análise , Técnicas de Amplificação de Ácido Nucleico/métodos , Análise de Sequência com Séries de Oligonucleotídeos/métodos , Ração Animal/análise , Animais , Bovinos , Cervos , Cães , Raposas , Cabras , Cavalos , Vison , Técnicas de Amplificação de Ácido Nucleico/instrumentação , Aves Domésticas , Suínos
7.
J Cell Mol Med ; 23(4): 2731-2743, 2019 04.
Artigo em Inglês | MEDLINE | ID: mdl-30770623

RESUMO

Lipid metabolism disorders lead to vascular endothelial injury. Matrine is an alkaloid that has been used to improve obesity and diabetes and for the treatment of hepatitis B. However, its effect on lipid metabolism disorders and vascular injury is unclear. Here, we investigated the effect of matrine on high-fat diet fed mice and oxidized low-density lipoprotein (ox-LDL)-induced human umbilical vein endothelial cells (HUVECs). Computational virtual docking analyses, phosphoinositide 3-kinase (PI3K) and protein kinase C-α (PKCα) inhibitors were used to localize matrine in vascular injuries. The results showed that matrine-treated mice were more resistant to abnormal lipid metabolism and inflammation than vehicle-treated mice and exhibited significantly alleviated ox-LDL-stimulated dysfunction of HUVECs, restored diminished nitric oxide release, decreased reactive oxygen species generation and increased expression phosphorylation of AKT-Ser473 and endothelial nitric oxide synthase (eNOS)-Ser1177. Matrine not only up-regulates eNOS-Ser1177 but also down-regulates eNOS-Thr495, a PKCα-controlled negative regulator of eNOS. Using computational virtual docking analyses and biochemical assays, matrine was also shown to influence eNOS/NO via PKCα inhibition. Moreover, the protective effects of matrine were significantly abolished by the simultaneous application of PKCα and the PI3K inhibitor. Matrine may thus be potentially employed as a novel therapeutic strategy against high-fat diet-induced vascular injury.


Assuntos
Alcaloides/farmacologia , Dieta Hiperlipídica/efeitos adversos , Endotélio Vascular/efeitos dos fármacos , Regulação da Expressão Gênica/efeitos dos fármacos , Lipoproteínas LDL/toxicidade , Quinolizinas/farmacologia , Lesões do Sistema Vascular/prevenção & controle , Animais , Endotélio Vascular/metabolismo , Endotélio Vascular/patologia , Células Endoteliais da Veia Umbilical Humana , Humanos , Técnicas In Vitro , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Óxido Nítrico/metabolismo , Óxido Nítrico Sintase Tipo III/genética , Óxido Nítrico Sintase Tipo III/metabolismo , Fosfatidilinositol 3-Quinases/genética , Fosfatidilinositol 3-Quinases/metabolismo , Proteína Quinase C-alfa/genética , Proteína Quinase C-alfa/metabolismo , Proteínas Proto-Oncogênicas c-akt/genética , Proteínas Proto-Oncogênicas c-akt/metabolismo , Transdução de Sinais , Lesões do Sistema Vascular/etiologia , Lesões do Sistema Vascular/metabolismo , Lesões do Sistema Vascular/patologia , Matrinas
8.
J Transl Med ; 17(1): 277, 2019 Aug 21.
Artigo em Inglês | MEDLINE | ID: mdl-31434567

RESUMO

Following publication of the original article [1], the authors reported errors in Fig. 5. The ROS picture of low dose Marine intervention group in Fig. 5d was used incorrectly, which was caused by the error of the storage path of the picture in the experiment. It was not discovered in time due to the approximation of the two graphs. In addition, the label of middle dose Marine intervention group in Fig. 5a was omitted.

9.
Clin Sci (Lond) ; 133(12): 1281-1295, 2019 06 28.
Artigo em Inglês | MEDLINE | ID: mdl-31171573

RESUMO

GDF1 plays an important role in left-right patterning and genetic mutations in the coding region of GDF1 are associated with congenital heart disease (CHD). However, the genetic variation in the promoter of GDF1 with sporadic CHD and its expression regulation is little known. The association of the genetic variation in GDF1 promoter with CHD was examined in two case-control studies, including 1084 cases and 1198 controls in the first study and 582 cases and 615 controls in the second study. We identified one single nucleotide polymorphism (SNP) rs181317402 and two novel genetic mutations located in the promoter region of GDF1. Analysis of combined samples revealed a significant association in genotype and allele frequencies of rs181317402 T/G polymorphism between CHD cases in overall or ventricular septal defects or Tetralogy of Fallot and the control group. rs181317402 allele G polymorphism was significantly associated with a decreased risk of CHD. Furthermore, luciferase assay, chromatin immunoprecipitation and DNA pulldown assay indicated that Nkx2.5 transactivated the expression of GDF1 by binding to the promoter of GDF1. Luciferase activity assay showed that rs181317402 allele G significantly increased the basal and Nkx2.5-mediated activity of GDF1 promoter, while the two genetic mutations had the opposite effect. rs181317402 TG genotype was associated with significantly increased mRNA level of GDF1 compared with TT genotype in 18 CHD individuals. Our results demonstrate for the first time that Nkx2.5 acts upstream of GDF1 and the genetic variants in GDF1 promoter may confer genetic susceptibility to sporadic CHD potentially by altering its expression.


Assuntos
Fator 1 de Diferenciação de Crescimento/genética , Cardiopatias Congênitas/genética , Proteína Homeobox Nkx-2.5/genética , Mutação , Polimorfismo de Nucleotídeo Único , Regiões Promotoras Genéticas , Transcrição Gênica , Ativação Transcricional , Animais , Estudos de Casos e Controles , Criança , Pré-Escolar , China , Feminino , Estudos de Associação Genética , Predisposição Genética para Doença , Fator 1 de Diferenciação de Crescimento/metabolismo , Células HEK293 , Cardiopatias Congênitas/diagnóstico , Cardiopatias Congênitas/metabolismo , Proteína Homeobox Nkx-2.5/metabolismo , Humanos , Lactente , Recém-Nascido , Masculino , Miócitos Cardíacos/metabolismo , Fenótipo , Ratos , Fatores de Risco , Peixe-Zebra/embriologia
10.
Appl Microbiol Biotechnol ; 103(11): 4575-4584, 2019 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-31001745

RESUMO

The identification of animal species in feed and feedstuffs is important for detecting contamination and fraudulent replacement of animal components that might cause health and economic problems. A novel multiplex assay, based on xMAP technology and the generic detection of closely related species, was developed for the simultaneous differential detection of avian, fish, and ruminant DNA in products. Universal primers and probes specific to avian, fish, or ruminant species were designed to target a conserved mitochondrial DNA sequence in the 12S ribosomal RNA gene (rRNA). The assay specificity was validated using samples of 27 target and 10 nontarget animal species. The limits of detection of the purified DNA were determined to be 0.2 pg/µL-0.1 ng/µL by testing the meat samples of six species and four feedstuffs. The detection sensitivity of the experimental mixtures was demonstrated to be 0.01% (weight percentage). The assay's suitability for practical application was evaluated by testing feed samples; unlabeled animal ingredients were detected in 32% of the 56 samples. The assay differentially detected the three targeted categories of animal species in less than 2 h, reflecting improvements in speed and efficiency. Based on these results, this novel multiplex xMAP assay provides a reliable and highly efficient technology for the routine detection of animal species in feed and other products for which this information is needed.


Assuntos
Ração Animal/análise , DNA/isolamento & purificação , Contaminação de Alimentos , Hibridização de Ácido Nucleico/métodos , Reação em Cadeia da Polimerase/métodos , Animais , Aves , DNA/genética , Primers do DNA/genética , Peixes , Sondas de Oligonucleotídeos/genética , RNA Ribossômico/genética , Ruminantes , Sensibilidade e Especificidade
11.
J Transl Med ; 16(1): 319, 2018 11 20.
Artigo em Inglês | MEDLINE | ID: mdl-30458883

RESUMO

BACKGROUND: Endoplasmic reticulum (ER) stress, which can promote lipid metabolism disorders and steatohepatitis, contributes significantly to the pathogenesis of nonalcoholic fatty liver disease (NAFLD). Calcium (Ca2+) homeostasis is considered to play a key role in ER stress. Matrine (Mat) has been applied for the treatment of hepatitis B, but its effect on NAFLD is still unknown, and there is no unified view of Mat on the regulation of ER stress in the previous literature. METHODS: The pharmacological effects were studied in high-fat-diet or methionine-choline-deficient diet induced C57BL/6J mice models and in palmitic acid (PA) induced L02 human liver cell model. Calcium fluorescence experiments, computational virtual docking analysis and biochemical assays were used in identifying the locus of Mat. RESULTS: The results showed that Mat-treated mice were more resistant to steatosis in the liver than vehicle-treated mice and that Mat significantly reduced hepatic inflammation, lipid peroxides. The beneficial effect of Mat was associated with suppressing ER stress and restoring mitochondrial dysfunction. Additionally, Mat decreased the PA-induced lipid accumulation, ER stress and cytosolic calcium level ([Ca2+]c) in hepatocyte cell lines in low and middle dose. However, the high dose Mat did not show satisfactory results in cell model. Calcium fluorescence experiments showed that Mat was able to regulate [Ca2+]c. By computational virtual docking analysis and biochemical assays, Mat was shown to influence [Ca2+]c via direct inhibition of SERCA. CONCLUSIONS: The results showed that the bi-directional regulation of Mat to endoplasmic reticulum at different doses was based on the inhibition of SERCA. In addition, the results also provide a theoretical basis for Mat as a potential therapeutic strategy in NAFLD/NASH.


Assuntos
Alcaloides/farmacologia , Estresse do Retículo Endoplasmático/efeitos dos fármacos , Mitocôndrias/patologia , Hepatopatia Gordurosa não Alcoólica/enzimologia , Hepatopatia Gordurosa não Alcoólica/patologia , Quinolizinas/farmacologia , ATPases Transportadoras de Cálcio do Retículo Sarcoplasmático/metabolismo , Animais , Apoptose/efeitos dos fármacos , Peso Corporal/efeitos dos fármacos , Cálcio/metabolismo , Citosol/metabolismo , Dieta Hiperlipídica , Homeostase/efeitos dos fármacos , Humanos , Inflamação/patologia , Metabolismo dos Lipídeos/efeitos dos fármacos , Masculino , Camundongos Endogâmicos C57BL , Mitocôndrias/efeitos dos fármacos , Ácido Palmítico , Espécies Reativas de Oxigênio/metabolismo , Matrinas
12.
Electrophoresis ; 39(24): 3156-3170, 2018 12.
Artigo em Inglês | MEDLINE | ID: mdl-30194859

RESUMO

In this paper, we numerically investigated a multifunctional AC electrothermal (ACET) micropump embedded with an asymmetric spiral microelectrode pair in a cylindrical microchannel for simultaneous pumping and mixing in high-conductivity fluids, which makes the pump useful for biofluid applications. When an AC signal was applied to the asymmetric spiral electrode pair, the vortices induced on the electrode surfaces with centerlines along the corresponding spiral electrode length exhibit a spiral distribution, and the net flow in the cylindrical microchannel is generated by the ACET effect. The vorticity field distribution can explain the mechanism of simultaneous pumping and mixing. Because the vorticity field is inclined against the microchannel direction, vortices on top of the spiral electrodes can affect the ACET flow in the following two aspects at the same time: one is pumping the flow in the microchannel direction, and the other is mixing the samples by stirring the flow. We also determined that the geometric ratios of the electrode width to the gap or slant angle of the spiral electrodes can feasibly be used to control the relative strength of the pumping and mixing capabilities, and we achieved an optimal design that gives both desirable pumping and mixing efficiencies. This study shows that the spiral ACET micropump design can rapidly drive the high-conductivity fluids and efficiently mix samples simultaneously. The numerical simulation of the spiral ACET micropump is of significant importance for practical, chemical and biological applications, and feasible fabrication techiniques should be experimentally investigated in future studies.


Assuntos
Biotecnologia/instrumentação , Microeletrodos , Técnicas Analíticas Microfluídicas/instrumentação , Simulação por Computador , Desenho de Equipamento , Temperatura
13.
J Am Soc Nephrol ; 28(6): 1729-1740, 2017 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-28028135

RESUMO

Two metrics, a rise in serum creatinine concentration and a decrease in urine output, are considered tantamount to the injury of the kidney tubule and the epithelial cells thereof (AKI). Yet neither criterion emphasizes the etiology or the pathogenetic heterogeneity of acute decreases in kidney excretory function. In fact, whether decreased excretory function due to contraction of the extracellular fluid volume (vAKI) or due to intrinsic kidney injury (iAKI) actually share pathogenesis and should be aggregated in the same diagnostic group remains an open question. To examine this possibility, we created mouse models of iAKI and vAKI that induced a similar increase in serum creatinine concentration. Using laser microdissection to isolate specific domains of the kidney, followed by RNA sequencing, we found that thousands of genes responded specifically to iAKI or to vAKI, but very few responded to both stimuli. In fact, the activated gene sets comprised different, functionally unrelated signal transduction pathways and were expressed in different regions of the kidney. Moreover, we identified distinctive gene expression patterns in human urine as potential biomarkers of either iAKI or vAKI, but not both. Hence, iAKI and vAKI are biologically unrelated, suggesting that molecular analysis should clarify our current definitions of acute changes in kidney excretory function.


Assuntos
Injúria Renal Aguda/classificação , Injúria Renal Aguda/genética , Transcriptoma , Animais , Feminino , Expressão Gênica , Humanos , Camundongos , Camundongos Endogâmicos C57BL
14.
Appl Microbiol Biotechnol ; 99(2): 919-28, 2015 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-25557628

RESUMO

A novel multiplex detection array based on Luminex xMAP technology was developed and validated for simultaneous detection of five major viruses causing swine reproductive diseases. By combining one-step asymmetric multiplex reverse transcription polymerase chain reaction (RT-PCR) with xMAP bead-based hybridization and flow cytometry analysis, the resulting multiplex assay was capable of detecting single and mixed infections of PRRSV, PCV-2, PRV, CSFV, and PPV in a single reaction. The assay accurately detected and differentiated 23 viral strains used in this study. The low detection limit was determined as 2.2-22 copies/µL (corresponding to 0.5-6.8 fg/µL DNA template) on plasmid constructs containing viral fragments. The intra-assay and inter-assay variances (CV%) were low that ranged from 2.5 to 5.4 % and 4.1 to 7.6 %, respectively. The assay was applied to test field samples and detected single and mixed viral infections. The detection rate was higher than that of uniplex conventional PCR and RT-PCR methods. The detection of PRRSV by the bead-based multiplex assay was comparable with a commercially available real time RT-PCR kit. The test procedure on purified DNA or RNA samples could be completed within 2 h. In conclusion, the bead-based suspension array presented here proved to be a high-throughput practical tool that provided highly specific and sensitive identification of single and multiple infections of five major viruses in pigs and boar semen.


Assuntos
Circovirus/isolamento & purificação , Vírus da Febre Suína Clássica/isolamento & purificação , DNA Viral/isolamento & purificação , Parvovirus Suíno/isolamento & purificação , Vírus da Síndrome Respiratória e Reprodutiva Suína/isolamento & purificação , RNA Viral/isolamento & purificação , Animais , Circovirus/classificação , Peste Suína Clássica/diagnóstico , Peste Suína Clássica/virologia , Primers do DNA , DNA Viral/genética , Reação em Cadeia da Polimerase Multiplex , RNA Viral/genética , Reação em Cadeia da Polimerase em Tempo Real , Reprodutibilidade dos Testes , Sensibilidade e Especificidade , Manejo de Espécimes , Suínos/virologia , Doenças dos Suínos/diagnóstico , Doenças dos Suínos/virologia
15.
Biochim Biophys Acta ; 1832(12): 2145-52, 2013 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-23899608

RESUMO

As a NODAL pathway inhibitor, EBAF plays a critical role during mammalian cardiac development. As recent tests that have been conducted on gene-targeted mice indicate, its expression is frequently altered where cardiac defects are present. We aimed to explore the EBAF expression pattern and molecular mechanism of EBAF gene for VSD genesis. In this report, we show that the average expression of EBAF in the disease tissues of VSD patients was lower than the expression in normal fetuses without VSD. Further study showed that the expression pattern of EBAF was potentially involved in cardiomyocyte apoptosis by Annexin-V and RT-PCR assays. We also found that abnormal activation of NODAL-PITX2C pathway was associated with down-regulation of EBAF. By luciferase reporter assays, we find that EBAF expression is mediated by transcriptional factors smad2 and cited2. In addition, ChIP assays showed that histone acetyltransferase p300 is involved in the activation of EBAF through inducing hyperacetylation of histone H4 at the EBAF promoter. Co-immunoprecipitation also indicates that the expression of EBAF is regulated by a transcriptional complex including p300, smad2, and cited2. This study revealed a novel regulator mechanism of EBAF, which may be a potential molecular target for halting the onset of VSDs. They also indicate that smad2, cited2, and p300 may play important roles in modulating the confirmation of ventricular septal defects.


Assuntos
Proteína p300 Associada a E1A/metabolismo , Comunicação Interventricular/patologia , Coração/fisiopatologia , Fatores de Determinação Direita-Esquerda/genética , Proteínas Repressoras/metabolismo , Proteína Smad2/metabolismo , Transativadores/metabolismo , Acetilação , Apoptose , Sequência de Bases , Western Blotting , Proliferação de Células , Células Cultivadas , Imunoprecipitação da Cromatina , Proteína p300 Associada a E1A/genética , Comunicação Interventricular/genética , Comunicação Interventricular/metabolismo , Histonas/genética , Histonas/metabolismo , Proteínas de Homeodomínio/genética , Proteínas de Homeodomínio/metabolismo , Humanos , Imunoprecipitação , Fatores de Determinação Direita-Esquerda/antagonistas & inibidores , Fatores de Determinação Direita-Esquerda/metabolismo , Dados de Sequência Molecular , Miócitos Cardíacos/citologia , Miócitos Cardíacos/metabolismo , Proteína Nodal/genética , Proteína Nodal/metabolismo , Regiões Promotoras Genéticas/genética , RNA Mensageiro/genética , Reação em Cadeia da Polimerase em Tempo Real , Proteínas Repressoras/genética , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Proteína Smad2/genética , Transativadores/genética , Fatores de Transcrição/genética , Fatores de Transcrição/metabolismo , Proteína Homeobox PITX2
16.
Biochem Cell Biol ; 92(3): 183-90, 2014 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-24773581

RESUMO

Pathological cardiac hypertrophy is a major cause of morbidity and mortality in cardiovascular disease. Recent studies have shown that cardiomyocytes, in response to high glucose (HG) stimuli, undergo hypertrophic growth. While much work still needs to be done to elucidate this important mechanism of hypertrophy, previous works have showed that some pathways or genes play important roles in hypertrophy. In this study, we showed that sublethal concentrations of glucose (25 mmol/L) could induce cardiomyocyte hypertrophy with an increase in the cellular surface area and the upregulation of the atrial natriuretic peptide (ANP) gene, a hypertrophic marker. High glucose (HG) treatments resulted in the upregulation of the Nodal gene, which is under-expressed in cardiomyocytes. We also determined that the knockdown of the Nodal gene resisted HG-induced cardiomyocyte hypertrophy. The overexpression of Nodal was able to induce hypertrophy in cardiomyocytes, which was associated with the upregulation of the PITX2C gene. We also showed that increases in the PITX2C expression, in response to Nodal, were mediated by the Smad4 signaling pathway. This study is highly relevant to the understanding of the effects of the Nodal-PITX2C pathway on HG-induced cardiomyocyte hypertrophy, as well as the related molecular mechanisms.


Assuntos
Glucose/farmacologia , Proteínas de Homeodomínio/metabolismo , Hipertrofia/induzido quimicamente , Miócitos Cardíacos/efeitos dos fármacos , Miócitos Cardíacos/patologia , Proteína Nodal/metabolismo , Transdução de Sinais , Fatores de Transcrição/metabolismo , Células Cultivadas , Proteínas de Homeodomínio/genética , Humanos , Miócitos Cardíacos/metabolismo , Proteína Nodal/genética , Transdução de Sinais/efeitos dos fármacos , Fatores de Transcrição/genética , Regulação para Cima , Proteína Homeobox PITX2
17.
Pediatr Cardiol ; 35(6): 1057-61, 2014 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-24752771

RESUMO

MiR-143 plays an important role in the heart development of zebra fish. The rs41291957 variant located in the pri-miR-143 sequence is associated with colorectal carcinogenesis. Therefore, the authors hypothesized that rs41291957 in pri-miR-143 might be involved in the risk of sporadic congenital heart disease (CHD). The authors conducted a case-control study of CHD in a Chinese population to test their hypothesis by genotyping pri-miR-143 rs41291957 in 1,109 CHD cases and 915 non-CHD control subjects. Logistic regression analyses showed no significant association of genotype or allele frequencies of pri-miR-143 rs41291957 A/G polymorphism with the CHD cases in overall or various subtypes compared with the control group. To the authors' knowledge, this is the first study to investigate the relationship between miR-143 and CHD cases. The results demonstrated that rs41291957 in pri-miR-143 has no major role in genetic susceptibility to sporadic CHD, at least in the current study population.


Assuntos
Cardiopatias Congênitas/genética , MicroRNAs/genética , Adolescente , Estudos de Casos e Controles , Criança , Pré-Escolar , China/epidemiologia , Feminino , Predisposição Genética para Doença , Cardiopatias Congênitas/epidemiologia , Humanos , Masculino , Polimorfismo de Nucleotídeo Único , Medição de Risco/métodos , Adulto Jovem
18.
Sci Total Environ ; 912: 168917, 2024 Feb 20.
Artigo em Inglês | MEDLINE | ID: mdl-38030013

RESUMO

Exposure to the organochlorine fungicide pentachloronitrobenzene (PCNB) causes developmental abnormalities, including cardiac malformation. However, the molecular mechanism of PCNB cardiotoxicity remains elusive. We found that oral administration of PCNB to pregnant mice induced a hypoplastic wall with significant thinning of the compact myocardium in the developing hearts. PCNB significantly downregulates the expression of Hec1, a member of the NDC80 kinetochore complex, resulting in aberrant spindles, chromosome missegregation and an arrest in cardiomyocyte proliferation. Cardiac-specific ablation of Hec1 sharply inhibits cardiomyocyte proliferation, leading to thinning of the compact myocardium and embryonic lethality. Mechanistically, we found that activating transcription factor 3 (ATF3) transactivates Hec1 expression. Either HEC1 or ATF3 overexpression significantly rescues mitotic defects and restore the decreased proliferative ability of cardiomyocytes caused by PCNB exposure. Our findings highlight that maternal PCNB exposure disrupts embryonic cardiac function by inhibiting cardiomyocyte proliferation and interfering with ventricular wall development, partially attributed to the downregulation of the Atf3-Hec1 axis.


Assuntos
Miócitos Cardíacos , Nitrobenzenos , Proteínas Nucleares , Animais , Camundongos , Regulação para Baixo , Proteínas Nucleares/genética , Proteínas Nucleares/metabolismo , Proliferação de Células
19.
Adv Sci (Weinh) ; 11(21): e2401076, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38489669

RESUMO

Developing ultrahigh-strength fabric-based triboelectric nanogenerators for harvesting high-impact energy and sensing biomechanical signals is still a great challenge. Here, the constraints are addressed by design of a multistrand twisted triboelectric Kevlar (MTTK) yarn using conductive and non-conductive Kevlar fibers. Manufactured using a multistrand twisting process, the MTTK yarn offers superior tensile strength (372 MPa), compared to current triboelectric yarns. In addition, a self-powered impact sensing fabric patch (SP-ISFP) comprising signal acquisition, processing, communication circuit, and MTTK yarns is integrated. The SP-ISFP features withstanding impact (4 GPa) and a sensitivity and response time under the high impact condition (59.68 V GPa-1; 0.4 s). Furthermore, a multi-channel smart bulletproof vest is developed by the array of 36 SP-ISFPs, enabling the reconstruction of impact mapping and assessment of body injury location and levels by real-time data acquisition. Their potential to reduce body injuries, professional security, and construct a multi-point personal vital signs dynamic monitoring platform holds great promise.


Assuntos
Têxteis , Humanos , Desenho de Equipamento/métodos , Resistência à Tração , Dispositivos Eletrônicos Vestíveis , Fontes de Energia Elétrica
20.
Adv Mater ; : e2312596, 2024 Mar 15.
Artigo em Inglês | MEDLINE | ID: mdl-38490737

RESUMO

Soft electronics are garnering significant attention due to their wide-ranging applications in artificial skin, health monitoring, human-machine interaction, artificial intelligence, and the Internet of Things. Various soft physical sensors such as mechanical sensors, temperature sensors, and humidity sensors are the fundamental building blocks for soft electronics. While the fast growth and widespread utilization of electronic devices have elevated life quality, the consequential electromagnetic interference (EMI) and radiation pose potential threats to device precision and human health. Another substantial concern pertains to overheating issues that occur during prolonged operation. Therefore, the design of multifunctional soft electronics exhibiting excellent capabilities in sensing, EMI shielding, and thermal management is of paramount importance. Because of the prominent advantages in chemical stability, electrical and thermal conductivity, and easy functionalization, new carbon materials including carbon nanotubes, graphene and its derivatives, graphdiyne, and sustainable natural-biomass-derived carbon are particularly promising candidates for multifunctional soft electronics. This review summarizes the latest advancements in multifunctional soft electronics based on new carbon materials across a range of performance aspects, mainly focusing on the structure or composite design, and fabrication method on the physical signals monitoring, EMI shielding, and thermal management. Furthermore, the device integration strategies and corresponding intriguing applications are highlighted. Finally, this review presents prospects aimed at overcoming current barriers and advancing the development of state-of-the-art multifunctional soft electronics.

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