5,584 Works

Numerical simulation of ball bearing flow field using the moving particle semi-implicit method

Wei Wu, Chunhui Wei & Shihua Yuan
The distribution of lubricating oil in the bearing cavity is of great significance to bearing lubrication and cooling. A new idea is provided to further study the ball bearings lubrication, to achieve effective lubrication of bearings. The flow field of oil injection lubrication ball bearings is studied by the moving particle semi-implicit (MPS) method. The accuracy of the numerical calculation method is verified by experiments. The oil distribution of the bearing lubrication flow field and...

Network pharmacology and in vitro experimental verification to explore the mechanism of Sanhua decoction in the treatment of ischaemic stroke

Wei Zhang, Li Zhang, Wen jun Wang, Shanbo Ma, Mingming Wang, Minna Yao, Ruili Li, Wei wei Li, Xian Zhao, Dongmei Hu, Yi Ding & Jingwen Wang
Stroke is an illness with high morbidity, disability and mortality that presents a major clinical challenge. Sanhua decoction (SHD) has been widely used to treat ischaemic stroke in the clinic. However, the potential mechanism of SHD remains unknown. To elucidate the multitarget mechanism of SHD in ischaemic stroke through network pharmacology and bioinformatics analyses. Network pharmacology and experimental validation approach was used to investigate the bioactive ingredients, critical targets and potential mechanisms of SHD against...

Kavalactones isolated from Alpinia zerumbet (Pers.) Burtt. et Smith with protective effects against human umbilical vein endothelial cell damage induced by high glucose

Hualin You, Min He, Di Pan, Guanqin Fang, Yan Chen, Xu Zhang, Xiangchun Shen & Nenling Zhang
A new kavalactone, 4'-hydroxyl dihydro-5, 6-dehydrokavain (1) was isolated from the petroleum ether partition of leaves of Alpinia zerumbet (Pers.) Burtt. et Smith, together with four known kavalactone dimers, rel-1,trans-3-bis-(4-methoxy-2-oxopyran-6-yl)-cis-2,trans-4-diphenyl cyclobutene (2), aniba dimer A (3), aniba dimer C (4), 6,6'-(3,4-diphenylcyclobutane-1,2-diyl)bis(4-methoxy-2H-pyran-2-one (5). The structure of compound 1 was characterized by its MS, 1D-NMR, and 2D-NMR data, and the structures of the known compounds were determined by comparison of their spectroscopic data with those reported by...

Mafic-ultramafic rocks in the Buqingshan Complex of the East Kunlun Orogen, northern Tibetan Plateau: remnants of the Paleo-Tethys Ocean

Yuangang Yue, Yunpeng Dong, Shengsi Sun, Dengfeng He, Bo Hui, Xiang Ren, Bin Zhang & Weidong He
The Buqingshan Complex, the eastern part of the Muztagh–Buqingshan–Anemaqen ophiolitic mélange zone (MBAM), contains a series of oceanic rocks that represent the remnants of the Paleo-Tethys Ocean. Field investigations reveal that the mafic-ultramafic rocks consist mainly of serpentinite, diabase, massive basalt, and pillow basalt. The serpentinites show similar geochemical characteristics to abyssal peridotites, which is probably the residual part of the depleted upper mantle after 17–20% melt extraction. The mafic rocks have geochemical affinities similar...

Mafic-ultramafic rocks in the Buqingshan Complex of the East Kunlun Orogen, northern Tibetan Plateau: remnants of the Paleo-Tethys Ocean

Yuangang Yue, Yunpeng Dong, Shengsi Sun, Dengfeng He, Bo Hui, Xiang Ren, Bin Zhang & Weidong He
The Buqingshan Complex, the eastern part of the Muztagh–Buqingshan–Anemaqen ophiolitic mélange zone (MBAM), contains a series of oceanic rocks that represent the remnants of the Paleo-Tethys Ocean. Field investigations reveal that the mafic-ultramafic rocks consist mainly of serpentinite, diabase, massive basalt, and pillow basalt. The serpentinites show similar geochemical characteristics to abyssal peridotites, which is probably the residual part of the depleted upper mantle after 17–20% melt extraction. The mafic rocks have geochemical affinities similar...

The hsa_circRNA_102049 mediates the sorafenib sensitivity of hepatocellular carcinoma cells by regulating Reelin gene expression

Shaolei Wang, Dehua Liu, Hong Wei, Yang Hua, Guodong Shi & Jinhan Qiao
A growing body of research has illuminated that non-coding RNAs (ncRNAs) plays an important role in the development of drug resistance in hepatocellular carcinoma (HCC) cells. The expression profiles of differential expressed genes (DEGs) and ncRNAs related to the sorafenib resistance in HCC cells were analyzed according to the Gene Expression Omnibus (GEO) dataSets and The Cancer Genome Atlas (TCGA) datasets. Bioinformatics technology was used to construct the interaction network of DEGs and ncRNAs. Cell...

Gravity induces asymmetric Ca2+ spikes in the root cap in the early stage of gravitropism

Ruoxin Zhao, Zonghao Liu, Ziwei Li, Shi Xu & Xianyong Sheng
Gravitropism is an important strategy for the adaptation of plants to the changing environment. Previous reports indicated that Ca2+ participated in plant gravity response. However, present information on the functions of Ca2+ in plant gravitropism was obtained mainly on coleoptiles, hypocotyls, and petioles, little is known about the dynamic changes of Ca2+ during root gravitropism. In the present study, the transgenic Arabidopsis thaliana R-GECO1 was placed horizontally and subsequently vertically on a refitted Leica SP8...

A Gypsy element contributes to the nuclear retention and transcriptional regulation of the resident lncRNA in locusts

Xia Zhang, Ya′Nan Zhu, Bing Chen & Le Kang
The majority of long noncoding RNAs (lncRNAs) contain transposable elements (TEs). PAHAL, a nuclear-retained lncRNA that is inserted by a Gypsy retrotransposon, has been shown to be a vital regulator of phenylalanine hydroxylase (PAH) gene expression that controls dopamine biosynthesis and behavioural aggregation in the migratory locust. However, the role of the Gypsy retrotransposon in the transcriptional regulation of PAHAL remains unknown. Here, we identified a Gypsy retrotransposon (named Gypsy element) as an inverted long...

Network pharmacology and in vitro experimental verification to explore the mechanism of Sanhua decoction in the treatment of ischaemic stroke

Wei Zhang, Li Zhang, Wen jun Wang, Shanbo Ma, Mingming Wang, Minna Yao, Ruili Li, Wei wei Li, Xian Zhao, Dongmei Hu, Yi Ding & Jingwen Wang
Stroke is an illness with high morbidity, disability and mortality that presents a major clinical challenge. Sanhua decoction (SHD) has been widely used to treat ischaemic stroke in the clinic. However, the potential mechanism of SHD remains unknown. To elucidate the multitarget mechanism of SHD in ischaemic stroke through network pharmacology and bioinformatics analyses. Network pharmacology and experimental validation approach was used to investigate the bioactive ingredients, critical targets and potential mechanisms of SHD against...

Prostate-specific membrane antigen modulates the progression of prostate cancer by regulating the synthesis of arginine and proline and the expression of androgen receptors and Fos proto-oncogenes

Xi Hong, Liang Mao, Luwei Xu, Qiang Hu & Ruipeng Jia
The expression of prostate-specific membrane antigen (PSMA) is strikingly upregulated during oncogenesis and prostate cancer (PCa) progression, but the functions of this antigen in PCa remain unclear. Here, we constructed PSMA-knockdown LNCaP and 22rv1 cell lines and performed metabonomic and transcriptomic analyses to determine the effects of PSMA on PCa metabolism and transcription. The metabolism of arginine and proline was detected using specific kits. The mRNA and protein expression levels of the identified differentially expressed...

DNA topoisomerase II alpha promotes the metastatic characteristics of glioma cells by transcriptionally activating β-catenin

Yi Liu, Jun Ma, Jiu-Shan Song, Hai-Ying Zhou, Jing-Hui Li, Cheng Luo, Xin Geng & He-Xiang Zhao
DNA topoisomerase II alpha (TOP2A) reportedly plays a crucial role in several cancers, however, the precise regulatory role of TOP2A in metastatic characteristics of glioma is still poorly understood. Herein, we sought to elucidate the mechanisms by which TOP2A affects the metastatic phenotypes of glioma. We observed that a high level of TOP2A expression was dramatically linked with inferior survival in glioma patients while silencing of TOP2A impaired glioma cell proliferation and aggressiveness. TOP2A was...

DNA topoisomerase II alpha promotes the metastatic characteristics of glioma cells by transcriptionally activating β-catenin

Yi Liu, Jun Ma, Jiu-Shan Song, Hai-Ying Zhou, Jing-Hui Li, Cheng Luo, Xin Geng & He-Xiang Zhao
DNA topoisomerase II alpha (TOP2A) reportedly plays a crucial role in several cancers, however, the precise regulatory role of TOP2A in metastatic characteristics of glioma is still poorly understood. Herein, we sought to elucidate the mechanisms by which TOP2A affects the metastatic phenotypes of glioma. We observed that a high level of TOP2A expression was dramatically linked with inferior survival in glioma patients while silencing of TOP2A impaired glioma cell proliferation and aggressiveness. TOP2A was...

Pyroptosis regulators exert crucial functions in prognosis, progression and immune microenvironment of pancreatic adenocarcinoma: a bioinformatic and in vitro research

Zhenghai Bai, Fangshi Xu, Xiaodan Feng, Yuan Wu, Junhua Lv, Yu Shi & Honghong Pei
Pyroptosis is an inflammatory programmed cell death, showing potentials to be a novel anti-cancer approach. However, the roles of pyroptosis-related (PR) genes (PRGs) in pancreatic adenocarcinoma (PAAD) remain elusive. In the present study, we constructed a novel PR risk signature through the lasso regression analysis. The risk signature was greatly conducive to PAAD prognostic assessment. PR risk score was identified as an independent prognostic factor and could distinguish the prognostic differences of most clinical subgroups....

The role of Populus MYB94 transcription factor in seed germination requires the expression of ABA-responsive genes

Haiyang Wang, Hui Huang & Qing Fang
Plant seed germination is easily influenced by endogenous gene expression, hormones and environmental conditions. Here, we investigated a Populus R2R3-MYB transcription factor (referred to as MYB94) that plays a role in seed germination in close relation to the hormone abscisic acid (ABA). Two independent Arabidopsis transgenic lines overexpressing MYB94 (Oe-lines) and wild-type (Wt) were no clear differences in the seed germination rates under normal conditions, but the germination rates of the two Oe-lines were both...

The Effect of the Acidic Gas Pollutant on Wool Keratin Fiber Structure

Zhe Jiang, Rubing Bai, Jinfang Zhang, Ende Li, Yifan Cui, Ning Zhang, Nan Zhang & Qiang Wang
Increase in air pollution caused by acidic gases, such as nitrogen dioxide, call for the need to study potential effects on the structure of textile materials. Wool is a natural protein fiber which is easily damaged due to rich reaction positions and cross-linked bonds in the fiber. This study reports, for the first time, effect of nitrogen dioxide, as a model acid gas pollutant, on the structure of wool. On the macro level, wool fabric...

Nucleosides and amino acids, isolated from Cordyceps sinensis, protected against cyclophosphamide-induced myelosuppression in mice

Yu Zhang, Jie Liu, Yan Wang, Chengpeng Sun, Wenjia Li, Jianjian Qiu, Yanling Qiao, Fan Wu, Xiaokui Huo, Yue An, Baojing Zhang, Shuangcheng Ma, Jian Zheng & Xiaochi Ma
The material basis of Cordyceps sinensis (Berk.) Sacc has not yet been well understood and natural C. sinensis resources are very rare. The present study aimed to clarify the substance basis and compare the protective effect of natural and artificially-cultivated C. sinensis against cyclophosphamide (CTX)-induced myelosuppression. Both natural and artificially-cultivated C. sinensis effectively improved CTX-induced decrease of peripheral blood counts and hemopoietic growth factors, pathological changes, and apoptosis of bone marrow. Importantly, artificially-cultivated C. sinensis...

Combined radiofrequency ablation or microwave ablation with transarterial chemoembolization can increase efficiency in intermediate-stage hepatocellular carcinoma without more complication: a systematic review and meta-analysis

Yao Yang, Hongli Yu, Lingyu Qi, Chenxi Liu, Yuemin Feng, Jianni Qi, Jie Li & Qiang Zhu
Radiofrequency ablation (RFA) and microwave ablation (MWA) are widely used in combination with transarterial chemoembolization (TACE) for intermediate-stage hepatocellular carcinoma (HCC) in clinical practice. We aim to compare the efficacy and safety of TACE combined with RFA or MWA versus TACE monotherapy for intermediate-stage HCC. We searched PubMed, Embase, Web of Science, and the Cochrane Library for relevant studies. The outcomes included overall survival (OS), progression-free survival (PFS), local tumor control (LTC) rate, and major...

A defective lysophosphatidic acid-autophagy axis increases miscarriage risk by restricting decidual macrophage residence

Hui-Li Yang, Zhen-Zhen Lai, Jia-Wei Shi, Wen-Jie Zhou, Jie Mei, Jiang-Feng Ye, Tao Zhang, Jian Wang, Jian-Yuan Zhao, Da-Jin Li & Ming-Qing Li
Massive infiltrated and enriched decidual macrophages (dMφ) have been widely regarded as important regulators of maternal-fetal immune tolerance and trophoblast invasion, contributing to normal pregnancy. However, the characteristics of metabolic profile and the underlying mechanism of dMφ residence remain largely unknown. Here, we observe that dMφ display an active glycerophospholipid metabolism. The activation of ENPP2-lysophosphatidic acid (LPA) facilitates the adhesion and retention, and M2 differentiation of dMφ during normal pregnancy. Mechanistically, this process is mediated...

A defective lysophosphatidic acid-autophagy axis increases miscarriage risk by restricting decidual macrophage residence

Hui-Li Yang, Zhen-Zhen Lai, Jia-Wei Shi, Wen-Jie Zhou, Jie Mei, Jiang-Feng Ye, Tao Zhang, Jian Wang, Jian-Yuan Zhao, Da-Jin Li & Ming-Qing Li
Massive infiltrated and enriched decidual macrophages (dMφ) have been widely regarded as important regulators of maternal-fetal immune tolerance and trophoblast invasion, contributing to normal pregnancy. However, the characteristics of metabolic profile and the underlying mechanism of dMφ residence remain largely unknown. Here, we observe that dMφ display an active glycerophospholipid metabolism. The activation of ENPP2-lysophosphatidic acid (LPA) facilitates the adhesion and retention, and M2 differentiation of dMφ during normal pregnancy. Mechanistically, this process is mediated...

Role of lncRNA FAM83H antisense RNA1 (FAM83H-AS1) in the progression of non-small cell lung cancer by regulating the miR-545-3p/heparan sulfate 6-O-sulfotransferase (HS6ST2) axis

Yue Zhang, Yue Yu, Xuchen Cao & Peng Chen
Long non-coding RNAs (lncRNAs) are crucial regulators of cancer pathogenesis and are potentially useful diagnostic and prognostic biomarker tools. FAM83H antisense RNA1 (FAM83H-AS1) has been reported to be a vital regulator of different cancers; however, little attention has been paid to its significance in lung cancer. Non-tumorigenic lung cell line BEAS-2B and adenocarcinoma lung cancer cell lines NCI-H1299 and HCC827 were used in the present study. In addition, RNA immunoprecipitation, Western blotting, quantitative reverse transcription-PCR...

Role of lncRNA FAM83H antisense RNA1 (FAM83H-AS1) in the progression of non-small cell lung cancer by regulating the miR-545-3p/heparan sulfate 6-O-sulfotransferase (HS6ST2) axis

Yue Zhang, Yue Yu, Xuchen Cao & Peng Chen
Long non-coding RNAs (lncRNAs) are crucial regulators of cancer pathogenesis and are potentially useful diagnostic and prognostic biomarker tools. FAM83H antisense RNA1 (FAM83H-AS1) has been reported to be a vital regulator of different cancers; however, little attention has been paid to its significance in lung cancer. Non-tumorigenic lung cell line BEAS-2B and adenocarcinoma lung cancer cell lines NCI-H1299 and HCC827 were used in the present study. In addition, RNA immunoprecipitation, Western blotting, quantitative reverse transcription-PCR...

Difficulties translating antisense-mediated activation of Frataxin expression from cell culture to mice

Audrius Kilikevicius, Jun Wang, Xiulong Shen, Frank Rigo, Thahza P. Prakash, Marek Napierala & David R. Corey
Friedreich’s ataxia (FA) is an inherited neurodegenerative disorder caused by decreased expression of frataxin (FXN) protein. Previous studies have shown that antisense oligonucleotides (ASOs) and single-stranded silencing RNAs can be used to increase expression of frataxin in cultured patient-derived cells. In this study, we investigate the potential for oligonucleotides to increase frataxin expression in a mouse model for FA. After confirming successful in vivo delivery of oligonucleotides using a benchmark gapmer targeting the nuclear noncoding...

A novel big data mining framework for reconstructing large-scale daily MAIAC AOD data across China from 2000 to 2020

Binjie Chen, Yang Ye, Cheng Tong, Jinsong Deng, Ke Wang & Yang Hong
Satellite-based aerosol optical depth (AOD) retrieval products are essential in air pollution and climate change research. Unfortunately, cloud contaminations and unfavorable surface conditions result in a considerable proportion of missing AOD data. Numerous studies have been conducted to reconstruct large-scale AOD data gaps by utilizing adjacent spatiotemporal information or modeling AOD data via various external geographical data. However, the erratic variation of AOD and the inconvenience of external data weaken the accuracy and efficiency of...

Integrative analyses of hub genes and their association with immune infiltration in adipose tissue, liver tissue and skeletal muscle of obese patients after bariatric surgery

Kemin Yan, Pengyuan Zhang, Jiewen Jin, Xin Chen, Hongyu Guan, Yanbing Li & Hai Li
Bariatric surgery (BS) is an effective treatment for obesity. Adipose tissue, liver tissue and skeletal muscle are important metabolic tissues. This study investigated hub genes and their association with immune infiltration in these metabolic tissues of obese patients after BS by bioinformatic analysis with Gene Expression Omnibus datasets. Differentially expressed genes (DEGs) were identified, and a protein–protein interaction network was constructed to identify hub genes. As a result, 121 common DEGs were identified and mainly...

Alleviative effects of foraging exercise on depressive-like behaviors in chronic mild stress-induced ischemic rat model

Xi Tao, Siyuan Wu, Wenjing Tang, Lu Li, Lijun Huang, Danheng Mo, Chujuan Liu, Tao Song, Shuling Wang, Jia Wang & Juan He
Poststroke depression (PSD) is a common complication that seriously affects the functional recovery and prognosis of an individual. As some patients with PSD fail to respond to drug therapy, it is urgent to find a viable alternative treatment. An active exercise program known as foraging exercise (FE), using food as bait, was designed. First, focal ischemia and chronic unpredictable mild stress (CUMS) were used to establish a PSD model in rats. FE was then performed...

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