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1.
J Cancer Res Ther ; 18(2): 488-495, 2022 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-35645119

RESUMO

Background: Golgi phosphoprotein-3 (GOLPH 3) is involved in the development of several human cancers. However, the clinical significance and biological role of GOLPH 3 in ovarian cancer (OC) remains unknown. Methods: The expression of GOLPH 3 in OC cell lines was quantified using real-time quantitative polymerase chain reaction (RT-qPCR) and western blot assays. The role of GOLPH 3 in tumorigenicity, migration, and invasion of OC cell lines by small interference RNA, scratch wound-healing assays, and transwell assays was detected. In addition, western blotting was used to determine whether GOLPH 3 is associated with the PI3K/AKT/mTOR signaling pathway. Furthermore, RT-qPCR verified whether GOLPH 3 is associated with drug resistance. Results: GOLPH 3-positive expression rate was higher in OC. Downregulation of GOLPH 3 markedly inhibited the migration and invasion and may be related to the PI3K/AKT/mTOR signal pathway. Moreover, the result of the experiment proved that GOLPH 3 enhances the sensitivity of OC to cisplatin by regulating ATP7A/B. GOLPH 3 promoted the invasion and migration of OC, and the mechanism may be related to the PI3K/Akt/mTOR pathway. In addition, inhibition of GOLPH 3 increased the sensitivity of OC cells to cisplatin, which may be associated with ATP7A/B. Conclusion: This study found that GOLPH3 may promote the migration and invasion of OC cells through PI3K/Akt/mTOR pathway. At the same time, low expression of GOLPH3 increased the sensitivity of OC cells to cisplatin.


Assuntos
Cisplatino , Proteínas de Membrana , Neoplasias Ovarianas , Carcinoma Epitelial do Ovário , Movimento Celular/genética , Proliferação de Células , Cisplatino/farmacologia , Resistencia a Medicamentos Antineoplásicos , Feminino , Humanos , Proteínas de Membrana/genética , Neoplasias Ovarianas/tratamento farmacológico , Neoplasias Ovarianas/genética , Neoplasias Ovarianas/metabolismo , Fosfatidilinositol 3-Quinases/genética , Fosfatidilinositol 3-Quinases/metabolismo , Fosfoproteínas , Proteínas Proto-Oncogênicas c-akt/metabolismo , Serina-Treonina Quinases TOR/genética
2.
J Environ Sci (China) ; 117: 141-150, 2022 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-35725066

RESUMO

UV/peroxymonosulfate (UV/PMS) advanced oxidation process has attracted significant attention for removal of micropollutants in water. However, during practical water treatment applications, the PMS treatment must be performed before the UV treatment to achieve full contact. In this study, sulfamethoxazole (SMX) was selected as the target micropollutant. Four different operational approaches, including UV alone, PMS alone, simultaneous UV/PMS and sequential PMS-UV, were compared for their differences in SMX removal and disinfection by-product (DBP) formation potentials during chlorine-driven disinfection. Among the four approaches, UV/PMS and PMS-UV achieved over 90% removal efficiencies for SMX without substantial differences. For raw water, the trichloronitromethane (TCNM) formation potential after treatment with PMS-UV was lower than that after UV/PMS treatment. The time interval over which the PMS-UV process was conducted had little effect on the final removal efficiency for SMX. However, a brief (5 min) pre-PMS treatment significantly reduced the TCNM formation potential and the genotoxicity from DBPs. The formation risk for TCNM during chlorination increased markedly with increasing PMS dosages, and the appropriate dosage under these experimental conditions was suggested to be 0.5-1.0 mmol/L. Under alkaline conditions, PMS-UV treatment can enhance SMX degradation as well as dramatically reduced the formation potentials for haloketones, haloacetonitriles and halonitromethanes. This study suggests that proper optimization of UV/PMS processes can remove SMX and reduce its DBP formation.


Assuntos
Poluentes Químicos da Água , Purificação da Água , Cloro , Desinfecção , Halogenação , Peróxidos , Sulfametoxazol , Poluentes Químicos da Água/análise
3.
Artigo em Inglês | MEDLINE | ID: mdl-35729353

RESUMO

PURPOSE: Controversy exists with regard to the T category of non-small cell lung cancer (NSCLC) with adjacent lobe invasion (ALI), and dispute arises on assigning this subset into T2 or T3 category. We evaluated the effect of ALI on the survival of resected NSCLC ≤ 5 cm, with purpose of determining the most appropriate T category for this population. METHODS: The entire cohort was divided into three subgroups (ALI group, T2 group and T3 group). Kaplan-Meier with log-rank method was carried out to compare overall survival (OS) differences. Propensity score matching (PSM) was performed to minimize bias. RESULTS: A total of 12,564 eligible NSCLC cases (ALI group: 114 cases; T2 group: 10,046 cases; T3 group: 2404 cases) were included in this study. The incidence of ALI was about 0.9%. Before PSM, survival analyses demonstrated that no significant OS differences were observed between ALI group and T2 group, and between ALI group and T3 group, neither in the entire cohort analysis nor in the subgroup analysis. After PSM, there were 102 pairs and 98 pairs in the ALI and T2 matching group and ALI and T3 matching group, respectively. In the matched cohorts, survival curves showed that the OS of ALI group was comparable to that of T2 group (P = 0.950), but superior to that of T3 group (P = 0.012). CONCLUSIONS: The current study proposed that NSCLC with ALI ≤ 5 cm should be still categorized as T2 category, which could improve staging accuracy.

5.
Chem Biodivers ; 2022 Jun 11.
Artigo em Inglês | MEDLINE | ID: mdl-35689671

RESUMO

[ABSTRACT] Three new alkamides, achilleamide B-D (1-3) along with five known alkamides (4-8) were isolated from the aerial parts of Achillea alpina L. Structures were elucidated by spectroscopic analysis. Modified Mosher's method and electronic circular dichroism (ECD) calculations were introduced for the absolute configuration of 3. Neuroprotective effects of all the compounds were evaluated by 6-hydroxydopamine (6-OHDA)-induced cell death in human neuroblastoma SH-SY5Y cells, with concentration for 50% of maximal effect (EC50) values of 3.16-24.75 µM and the structure activity relationship was conducted.

6.
Neoplasma ; 2022 Jun 20.
Artigo em Inglês | MEDLINE | ID: mdl-35723196

RESUMO

NPM1 plays an important role in the occurrence and development of leukemia and various solid tumors. This study aimed to investigate the expression of NPM1 in gastric cancer (GC) and adjacent normal tissues, study the relationship between NPM1 expression and clinicopathological characteristics in GC patients, and explore the impact of NPM1 expression on the diagnosis and prognosis of GC. We used tissue microarray immunohistochemical analysis to examine the expression level of NPM1 in GC and adjacent tissues and analyzed the relationship between NPM1 expression, clinicopathological factors, and GC prognosis. Prognostic values of NPM1 mRNA were also investigated using an online database. qRT-PCR was used to detect the expression of NPM1 mRNA in cancer and adjacent tissues. According to microarray immunohistochemical analysis and qRT-PCR results, NPM1 had a high expression in all adjacent normal tissues. Microarray immunohistochemical analyses demonstrated that the NPM1 was lowly expressed in 75.5% of GC tissues but highly expressed in 24.5% of GC tissues. qRT-PCR results showed NPM1 mRNA low expression in most GC tissues. NPM1 high expression group was associated with a better overall survival rate and disease-free survival rate than the NPM1 low expression group (p < 0.01). This result is consistent with that of the online database. The receiver operating characteristics curve showed that NPM1 was valuable in the diagnosis of GC. The assessment of NPM1 expression in GC samples may represent a useful tool for GC diagnosis and prognosis assessment.

7.
J Exp Bot ; 2022 Jun 05.
Artigo em Inglês | MEDLINE | ID: mdl-35661206

RESUMO

Somatic embryogenesis (SE) is a major regeneration approach for in vitro cultured tissues of plants, including citrus. However, SE capability is difficult to maintain, and recalcitrance to SE has become a major obstacle to plant biotechnology. We previously reported that miR156-SPL modules regulate SE in citrus callus. However, the downstream regulatory pathway of the miR156-SPL module in SE remains unclear. In this study, we found that the transcription factors (TFs) CsAGL15 and CsFUS3 bind to the CsMIR156A promoter and activate its expression. Suppression of csi-miR156a function leads to up-regulation of four target genes CsSPLs and reduction of SE efficiency. In the STTM-miR156a overexpressed callus (MIM156), the number of amyloplasts and starch content were significantly reduced, and genes involved in starch synthesis and transport were down-regulated; csi-miR172d was down-regulated, whereas the target genes CsTOE1.1 and CsTOE1.2, which inhibit the expression of starch biosynthesis genes, were up-regulated. In our working model, CsAGL15 and CsFUS3 activate csi-miR156a, which represses CsSPLs and further regulates csi-miR172d and CsTOEs, thus to alter starch accumulation level in callus cells and regulate SE in citrus. This study elucidates the pathway of miR156-SPLs and miR172-TOEs mediated regulation of SE, and provides clues to enhancing SE capability in citrus.

8.
Front Public Health ; 10: 910872, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35692330

RESUMO

Introduction: The Qinghai-Tibet Plateau is considered the most plague-heavy region in China, and skinning and eating marmots (Marmota himalayana) are understood to be the main exposure factors to plague. Yersinia pestis is relatively inactive during marmots' hibernation period. However, this case report shows plague infection risk is not reduced but rather increased during the marmot hibernation period if plague exposure is not brought under control. Case Presentation: The patient was a 45-year-old man who presented with high fever, swelling of axillary lymph nodes, and existing hand wounds on his right side. Y. pestis was isolated from his blood and lymphatic fluid. Hence, the patient was diagnosed with a confirmed case of bubonic plague. Later, his condition progressed to septicemic plague. Plague exposure through wounds and delays in appropriate treatment might have contributed to plague progression. Conclusion: This case report reveals that excavating a hibernating marmot is a significant transmission route of plague. Plague prevention and control measures are priority needs during the marmot hibernation period.


Assuntos
Marmota , Yersinia pestis , Animais , China , Humanos , Masculino , Pessoa de Meia-Idade
9.
Med Mycol ; 2022 May 31.
Artigo em Inglês | MEDLINE | ID: mdl-35641230

RESUMO

Azoles were used as the primary antifungal agents to treat the Cryptococcus gattii (C. gattii) infection. Evidence showed that subtypes of C. gattii respond differently to azoles, but the mechanism is largely elusive. In this study, we aimed to find the mechanisms of differences in azole drug susceptibility in different subtypes of C.gattii. Eight clinical strains of C. gattii were collected for molecular typing, multilocus sequence typing (MLST) analysis, and antifungal susceptibility testing. Based on drug susceptibility differences, the RNA sequencing data were analyzed to find candidate azole drug susceptibility genes, and qPCR validation was performed. Five VGI subtypes and three VGII subtypes were identified among the eight strains of C.gattii. The clinical isolates showed high genetic diversity, and seven sequence types (STs) were identified. The geometric mean (GM) of minimum inhibitory concentration (MIC) for fluconazole, voriconazole, and itraconazole of VGI subtype was significantly lower than that of VGII subtype, and genes related to transporter activities were differentially expressed between VGI and VGII strains. The results of the Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis showed that the DEGs (differential expressed genes) were found to be enriched in multiple ABC transporters. We further performed qPCR to quantify the expression level of seven ABC transporters. We found that ABC transporters ATM1, MDR1, PDR5, PDR5-3, and PXA2 were expressed significantly higher in VGII strains than in VGI strains. Our work revealed four novel ABC transporters, ATM1, PDR5, PDR5-3, and PXA2, promising candidate targets regulating azole susceptibility in C. gattii strains.


Azoles were used as the primary antifungal agents for treating C.gattii infection. Since subtypes of C. gattii respond differently to azoles. We analyzed mRNA expression profiles of different subtypes and identified four ABC transporters that could be potential genes regulating azole sensitivity.

10.
Spectrochim Acta A Mol Biomol Spectrosc ; 279: 121397, 2022 May 16.
Artigo em Inglês | MEDLINE | ID: mdl-35598576

RESUMO

Thiophenol (PhSH) is widely used in industry, however, it is extremely harmful to the environment and human health due to its high toxicity. In this work, we developed a new FRET-ICT-based ratiometric fluorescent and colorimetric probe (DMNP) for detecting PhSH. DMNP had an ultrahigh energy transfer efficiency (99.7%) and clear spacing of two emission peaks (133 nm). DMNP achieved a fast response to PhSH and exhibited drastic enhancement (over 2100 folds) of the fluorescence intensity ratio upon addition of PhSH. DMNP showed good linear response in the PhSH concentration ranges of 0.5-13 µM and 17.0-22.0 µM. Meanwhile, DMNP could also be applied to monitor PhSH in a variety of real water samples.

11.
J Ethnopharmacol ; 294: 115333, 2022 Aug 10.
Artigo em Inglês | MEDLINE | ID: mdl-35500802

RESUMO

ETHNOPHARMACOLOGICAL RELEVANCE: Penthorum chinense Pursh. (PCP) is commonly used as a Miao ethnomedicine and health food for liver protection in China. Gansukeli (WS3-B-2526-97) is made from the extract of PCP (PCPE) for the treatment of viral hepatitis. In recent years, PCPE has been reported in the treatment of non-alcoholic fatty liver disease (NAFLD), however its potential mechanism is not fully elucidated. AIM OF THE STUDY: To investigate the ameliorating effect of PCPE on high-fat diet (HFD)-induced NAFLD mice and demonstrate whether its protective effect is gut microbiota dependent and associated with bile acid (BA) metabolism. MATERIALS AND METHODS: The alleviating effect of PCPE on NAFLD was conducted on male C57BL/6J mice fed an HFD for 16 weeks, and this effect associated with gut microbiota dependent was demonstrated by pseudo-germfree mice treated with antibiotics and fecal microbiota transplantation (FMT). The composition of the gut microbiota in the cecum contents was analyzed by 16S rRNA sequencing, and the levels of BAs in liver and fecal samples were determined by UPLC/MS-MS. RESULTS: The results showed that administration of PCPE for 8 weeks could potently ameliorate HFD-induced NAFLD and alleviate dyslipidemia and insulin resistance. Moreover, PCPE treatment alleviated gut dysbiosis, especially reducing the relative abundance of bile salt hydrolase (BSH)-producing bacteria. Furthermore, PCPE significantly increased the levels of taurine-conjugated BAs in feces, such as tauro-ß-muricholic acid (T-ßMCA), tauroursodesoxycholic acid (TUDCA), and taurochenodeoxycholic acid (TCDCA), and increased hepatic chenodeoxycholic acid (CDCA). The protein and mRNA expression of farnesoid X receptor (FXR) and fibroblast growth factor 15 (FGF15) were decreased in intestine, increased taurine-conjugated BAs inhibited the intestinal signaling pathway, which was associated with increased genes expression of enzymes in the alternative BA synthesis pathway that reduced the levels of cholesterol. The increased CDCA produced via the alternative BA synthesis pathway promoted hepatic FXR activation and BA excretion. CONCLUSION: Our study is the first time to demonstrate that PCPE could ameliorate NAFLD in HFD-induced mice by regulating the gut microbiota and BA metabolism, and from a novel perspective, to clarify the mechanism of PCPE in NAFLD.


Assuntos
Microbioma Gastrointestinal , Hepatopatia Gordurosa não Alcoólica , Animais , Ácidos e Sais Biliares/metabolismo , Fígado/metabolismo , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Hepatopatia Gordurosa não Alcoólica/tratamento farmacológico , Hepatopatia Gordurosa não Alcoólica/metabolismo , Extratos Vegetais/uso terapêutico , RNA Ribossômico 16S/genética , Taurina/metabolismo
12.
Poult Sci ; 101(6): 101913, 2022 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-35525153

RESUMO

The objective of this study was to assess the effects of dietary supplementation of keratinase on the production of broilers fed a diet containing feather meal. A total of 162 1-d-old Cobb 500 male broiler (n = 9 cages/diet with 6 chicks/cage) were randomly allocated to 3 dietary treatments. The broilers were fed a corn-soybean-feather meal based diet (BD), or BD supplemented with keratinase at 100,000 or 200,000 U/kg for 6 weeks. Compared to the control, dietary supplementation with 200,000 U/kg keratinase increased (P < 0.05) body weight gain (3.6-4.3%) and reduced feed conversion ratio (2.4-5.6%) during the various experimental periods, and also improved (P < 0.05) apparent total tract digestibility of ash and calcium by 45.0% and 8.8%, respectively. Meanwhile, dietary supplementation of keratinase at 100,000 U/kg reduced (P < 0.05) the drip loss (29.2%), while 200,000 U/kg keratinase supplementation increased (P < 0.05) the pH value (1.6%) at 45 min and decreased (P < 0.05) the lightness (L* value; 13.6%) and drip loss (22.1%) of pectoral muscle. Moreover, dietary supplementation of keratinase at both levels of 100,000 and 200,000 U/kg increased (P < 0.05) Glutathione peroxidase activity (82.5-87.5%) and decreased the Malondialdehyde concentration (14.5-18.3%) in the pectoral muscle. In conclusion, dietary supplementation of keratinase at 200,000 U/kg can improve the performance, meat quality, apparent total tract digestibility of nutrients, and redox status of broiler chickens fed a diet containing feather meal.


Assuntos
Fenômenos Fisiológicos da Nutrição Animal , Galinhas , Ração Animal/análise , Animais , Galinhas/fisiologia , Dieta/veterinária , Suplementos Nutricionais , Plumas , Masculino , Carne/análise , Oxirredução , Peptídeo Hidrolases
13.
Int J Mol Sci ; 23(9)2022 Apr 19.
Artigo em Inglês | MEDLINE | ID: mdl-35562889

RESUMO

Ethylene is an essential platform chemical with a conjugated double bond, which can produce many secondary chemical products through copolymerisation. At present, ethylene production is mainly from petroleum fractionation and cracking, which are unsustainable in the long term, and harmful to our environment. Therefore, a hot research field is seeking a cleaner method for ethylene production. Based on the model ethylene-forming enzyme (Efe) AAD16440.1 (6vp4.1.A) from Pseudomonas syringae pv. phaseolicol, we evaluated five putative Efe protein sequences using the data derived from phylogenetic analyses and the conservation of their catalytic structures. Then, pBAD expression frameworks were constructed, and relevant enzymes were expressed in E. coli BL21. Finally, enzymatic activity in vitro and in vivo was detected to demonstrate their catalytic activity. Our results show that the activity in vitro measured by the conversion of α-ketoglutarate was from 0.21-0.72 µmol ethylene/mg/min, which varied across the temperatures. In cells, the activity of the new Efes was 12.28-147.43 µmol/gDCW/h (DCW, dry cellular weight). Both results prove that all the five putative Efes could produce ethylene.


Assuntos
Escherichia coli , Liases , Escherichia coli/genética , Escherichia coli/metabolismo , Etilenos/metabolismo , Liases/genética , Liases/metabolismo , Filogenia
14.
Artigo em Inglês | MEDLINE | ID: mdl-35550846

RESUMO

We aimed to evaluate the prognostic value of visceral pleural invasion on the survival of node-negative non-small cell lung cancer ≤3 cm using a large cohort. The Kaplan-Meier method was used to compare overall survival (OS); competing risk analysis with Fine-Gray's test was used to compare cancer- specific survival between groups. The least absolute shrinkage and selection operator penalized Cox regression model was used to identify prognostic factors. In total, 9725 eligible cases were included in this study, and they were separated into 3 groups: tumor invasion beneath the elastic layer (PL0), 8837 cases; tumor invasion surpassing the elastic layer (PL1), 505 cases; and tumor invasion to the visceral pleural surface (PL2), 383 cases. Visceral pleural invasion was more likely to occur in poorly differentiated and larger-sized tumors. Survival curves displayed that PL0 conferred better survival rates than PL1 and PL2, and PL1 achieved outcomes equivalent to those of PL2. Tumor size and histology subset analyses further corroborated this conclusion. Least absolute shrinkage and selection operator -penalized Cox regression analysis confirmed that PL status was an independent prognostic factor for both OS and cancer- specific survival. This study supported the notion that in node-negative non-small cell lung cancer ≤3 cm, PL1 patients should remain classified as pT2a, which could improve staging accuracy.

15.
Nat Commun ; 13(1): 2586, 2022 May 11.
Artigo em Inglês | MEDLINE | ID: mdl-35545637

RESUMO

The era of Big Data requires nanophotonic chips to have large information processing capacity. Multiple frequency on-chip nanophotonic devices are highly desirable for density integration, but such devices are more susceptible to structural imperfection because of their nano-scale. Topological photonics provides a robust platform for next-generation nanophotonic chips. Here we give an experimental report of an on-chip nanophotonic topological rainbow realized by employing a translational deformation freedom as a synthetic dimension. The topological rainbow can separate, slow, and trap topological photonic states of different frequencies into different positions. A homemade scattering scanning near-field optical microscope with high resolution is introduced to directly measure the topological rainbow effect of the silicon-based photonic chip. The topological rainbow based on synthetic dimension have no restrictions for optical lattice types, symmetries, materials, wavelength band, and is easy for on-chip integration. This work builds a bridge between silicon chip technologies and topological photonics.

16.
BMC Pulm Med ; 22(1): 176, 2022 May 04.
Artigo em Inglês | MEDLINE | ID: mdl-35509094

RESUMO

BACKGROUND: Altered metabolic pathways have recently been considered as potential drivers of idiopathic pulmonary fibrosis (IPF) for the study of drug therapeutic targets. However, our understanding of the metabolite profile during IPF formation is lacking. METHODS: To comprehensively characterize the metabolic disorders of IPF, a mouse IPF model was constructed by intratracheal injection of bleomycin into C57BL/6J male mice, and lung tissues from IPF mice at 7 days, 14 days, and controls were analyzed by pathology, immunohistochemistry, and Western Blots. Meanwhile, serum metabolite detections were conducted in IPF mice using LC-ESI-MS/MS, KEGG metabolic pathway analysis was applied to the differential metabolites, and biomarkers were screened using machine learning algorithms. RESULTS: We analyzed the levels of 1465 metabolites and found that more than one-third of the metabolites were altered during IPF formation. There were 504 and 565 metabolites that differed between M7 and M14 and controls, respectively, while 201 differential metabolites were found between M7 and M14. In IPF mouse sera, about 80% of differential metabolite expression was downregulated. Lipids accounted for more than 80% of the differential metabolite species with down-regulated expression. The KEGG pathway enrichment analysis of differential metabolites was mainly enriched to pathways such as the metabolism of glycerolipids and glycerophospholipids. Eight metabolites were screened by a machine learning random forest model, and receiver operating characteristic curves (ROC) assessed them as ideal diagnostic tools. CONCLUSIONS: In conclusion, we have identified disturbances in serum lipid metabolism associated with the formation of pulmonary fibrosis, contributing to the understanding of the pathogenesis of pulmonary fibrosis.


Assuntos
Bleomicina , Fibrose Pulmonar Idiopática , Animais , Biomarcadores , Bleomicina/toxicidade , Modelos Animais de Doenças , Glicerofosfolipídeos , Humanos , Fibrose Pulmonar Idiopática/metabolismo , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Espectrometria de Massas em Tandem
17.
ACS Appl Mater Interfaces ; 14(19): 22206-22215, 2022 May 18.
Artigo em Inglês | MEDLINE | ID: mdl-35522970

RESUMO

The photothermal Marangoni effect enables direct light-to-work conversion, which is significant for realizing the self-propulsion of objects in a noncontact, controllable, and continuous manner. Many promising applications have been demonstrated in micro- and nanomachines, light-driven actuators, cargo transport, and gear transmission. Currently, the related studies about photothermal Marangoni effect-induced self-propulsion, especially rotational motions, remain focused on developing the novel photothermal materials, the structural designs, and the controllable self-propulsion modes. However, extending the related research from the laboratory practice to practical application remains a challenge. Herein, we combined the photothermal Marangoni effect-induced self-propulsion with the triboelectric nanogenerator technology for sunlight intensity determination. Photothermal black silicon, superhydrophobic copper foam with drag-reducing property, and triboelectric polytetrafluoroethylene film were integrated to fabricate a triboelectric nanogenerator. The photothermal-Marangoni-driven triboelectric nanogenerator (PMD-TENG) utilizes the photothermal Marangoni effect-induced self-propulsion to realize the relative motion between the triboelectric layer and the electrode, converting light into electrical signals, with a peak value of 2.35 V. The period of the output electrical signal has an excellent linear relationship with the light intensity. The accessible electrical signal generation strategy proposed here provides a new application for the photothermal Marangoni effect, which could further inspire the practical applications of the self-powered system based on the photothermal Marangoni effect, such as intelligent farming.

18.
Artigo em Inglês | MEDLINE | ID: mdl-35613700

RESUMO

BACKGROUND: Existing studies on the association of age at menarche and age at natural menopause with diabetes are conflicting. OBJECTIVE: To explore the associations of age at menarche and age at natural menopause with diabetes, and to estimate whether body mass index, abdominal obesity, hypertension, and dyslipidemia would influence the relationships. METHODS: In this cross-sectional study, 5090 postmenopausal women were included from the China Multi-Ethnic Cohort Study (CMEC) baseline in Chongqing province. Questionnaires, physical examinations, and biological samples testing were conducted. Logistic regression was used to generate odds ratios (ORs) and 95% confidence intervals (CIs). And restricted cubic splines were performed to evaluate the pattern of association between ages at menarche and menopause with diabetes. RESULTS: The adjusted ORs for diabetes grouped by age at menarche (<12, 12-17, >17 years) were 0.76 (95%CI: 0.42-1.40), 1.00 (reference), and 0.73 (95%CI: 0.57-0.94). Similarly, the adjusted ORs for diabetes grouped by age at menopause (<44, 44-52, >52 years) were 1.38 (95%CI: 1.04-1.82), 1.00 (reference), and 1.11 (95%CI: 0.89-1.39). No significant interaction of age at menarche and menopause with body mass index, abdominal obesity, hypertension, and dyslipidemia in odds of diabetes was observed. CONCLUSION: Late menarche is associated with a lower prevalence of diabetes, while early natural menopause is associated with a higher prevalence of diabetes. No significant effect modification was observed by body mass index, abdominal obesity, hypertension, or dyslipidemia.

19.
Materials (Basel) ; 15(9)2022 Apr 23.
Artigo em Inglês | MEDLINE | ID: mdl-35591406

RESUMO

At high temperatures, the insulation performance of polypropylene (PP) decreases, making it challenging to meet the application requirements of metallized film capacitors. In this paper, the dielectric performance of PP is improved by long-chain branching modification and adding different kinds of nucleating agents. The added nucleating agents are organic phosphate nucleating agent (NA-21), sorbitol nucleating agent (DMDBS), rare earth nucleating agent (WBG-Ⅱ) and acylamino nucleating agent (TMB-5). The results show that the long-chain branches promote heterogeneous nucleation and inhibit the motion of molecular chains, thereby enhancing the dielectric properties at high temperatures. Nucleating agents modulate the crystalline morphology of long-chain branched polypropylene (LCBPP), which leads to a decrease in the mean free path of carriers and an increase in trap energy level and trap density. Therefore, the conductivity is reduced and the breakdown strength is improved. Among the added nucleating agents, NA-21 showed a significant improvement in the electrical properties of LCBPP films. At 125 °C, compared with PP, the breakdown strength of the modified film is increased by 26.3%, and the energy density is increased by 66.1%. This method provides a reference for improving the dielectric properties of PP.

20.
Cell Death Dis ; 13(5): 449, 2022 May 11.
Artigo em Inglês | MEDLINE | ID: mdl-35562171

RESUMO

Energy restriction (ER) protects against cerebral ischemic injury, but the underlying mechanism remains largely unclear. Here, rats were fed ad libitum (AL) or on an alternate-day food deprivation intermittent fasting (IF) diet for 3 months, followed by middle cerebral artery occlusion (MCAO) surgery. The body weight, infarct volume, and neurological deficit score were accessed at the designated time points. ELISA, qRT-PCR, and Western blotting were used to determine cytokine secretion and the expression of SIRT6, TXNIP, and signaling molecules, respectively. Immunofluorescence evaluated microglial activation and angiogenesis in vivo. For in vitro study, oxygen-glucose deprivation/reoxygenation (OGD/R)-treated cell model was generated. MTT and tube formation assays were employed to determine cell viability and tube formation capability. ChIP assay detected chromatin occupancy of SIRT6 and SIRT6-mediated H3 deacetylation. We found that IF or ER mimetics ameliorated cerebral ischemic brain damage and microglial activation, and potentiated angiogenesis in vivo. ER mimetics or SIRT6 overexpression alleviated cerebral ischemia and reperfusion (I/R)-induced injury in vitro. SIRT6 suppressed TXNIP via deacetylation of H3K9ac and H3K56ac in HAPI cells and BMVECs. Downregulation of SIRT6 reversed ER mimetics-mediated protection during cerebral I/R in vitro. Our study demonstrated that ER-mediated upregulation of SIRT6 inhibited microglia activation and potentiated angiogenesis in cerebral ischemia via suppressing TXNIP.


Assuntos
Isquemia Encefálica , Traumatismo por Reperfusão , Sirtuínas , Animais , Isquemia Encefálica/genética , Isquemia Encefálica/metabolismo , Proteínas de Ciclo Celular/metabolismo , Infarto da Artéria Cerebral Média/metabolismo , Microglia/metabolismo , Ratos , Traumatismo por Reperfusão/genética , Traumatismo por Reperfusão/metabolismo , Sirtuínas/genética , Sirtuínas/metabolismo
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