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  • Frontiers Media SA  (53)
  • Zhou, Jun  (53)
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  • Frontiers Media SA  (53)
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  • 1
    Online-Ressource
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    Model tests of the raw-water pipeline under the excessive stacking load
    Frontiers Media SA ; 2023
    In:  Frontiers in Earth Science Vol. 10 ( 2023-1-6)
    Details
    In: Frontiers in Earth Science, Frontiers Media SA, Vol. 10 ( 2023-1-6)
    Kurzfassung: To investigate the effect of excessive stacking loadings on the deformation of raw-water pipelines, a model test was designed based on the analogous theory in this paper. The design of the model box, selection of pipeline material, and preparation of remolded soil were conducted, respectively. A theoretical formula was derived to convert the results of the model test into actual ones. Then, the field test data and three-dimensional numerical values were employed to verify the correctness of the model test results. Finally, the stresses of pipelines were discussed under different loading conditions, pipe diameters, buried depths, and compactness of underlying soils, and the guidelines for pipeline protection were proposed based on the results of the model tests. It can lay a solid theoretical and practical foundation for the protection of buried pipelines.
    Materialart: Online-Ressource
    ISSN: 2296-6463
    URL: Article
    DOI: 10.3389/feart.2022.994862
    Sprache: Unbekannt
    Verlag: Frontiers Media SA
    Publikationsdatum: 2023
    ZDB Id: 2741235-0
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  • 2
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    Effects of Litsea cubeba essential oil on growth performance, blood antioxidation, immune function, apparent digestibility of nutrients, and fecal microflora of pigs
    Frontiers Media SA ; 2023
    In:  Frontiers in Pharmacology Vol. 14 ( 2023-7-3)
    Details
    In: Frontiers in Pharmacology, Frontiers Media SA, Vol. 14 ( 2023-7-3)
    Kurzfassung: The purpose of this experiment was to investigate the effects of Litsea cubeba essential oil (LCO) on the growth performance, blood antioxidation, immune function, apparent digestibility of nutrients, and fecal microflora in fattening pigs. A total of 120 pigs were randomly assigned to five groups, with six replicate pens per treatment and four pigs per pen, and they were fed basal diet, chlortetracycline (CTC), and low-, medium-, and high-concentration LCO. The results of the study showed that compared with the control treatment and CTC addition treatment of the basic diet, the catalase level in the serum of the pigs treated with 500 mg/kg LCO in the diet of finishing pigs was significantly increased ( p & lt; 0.05). The apparent digestibility of crude protein, crude ash, and calcium in pigs with different levels of LCO was significantly increased compared with the control treatments fed the basal diet ( p & lt; 0.05). In addition, compared with the control treatment fed the basal diet and the treatment with CTC , the apparent digestibility of ether extract in pigs treated with medium-dose LCO was significantly increased ( p & lt; 0.05), and the apparent digestibility of pigs was significantly increased after the addition of low-dose LCO ( p & lt; 0.05). Among the genera, the percentage abundance of SMB53 ( p & lt; 0.05) was decreased in the feces of the CTC group when compared to that in the medium-LCO group. At the same time, the relative abundance of L7A_E11 was markedly decreased in the feces of the control and medium- and high-concentration LCO group than that in the CTC group ( p & lt; 0.05). In conclusion, adding the level of 250 mg/kg LCO in the diet of pig could improve the growth performance and blood physiological and biochemical indicators of pigs, improve the antioxidant level of body and the efficiency of digestion and absorption of nutrients, and show the potential to replace CTC .
    Materialart: Online-Ressource
    ISSN: 1663-9812
    URL: Article
    DOI: 10.3389/fphar.2023.1166022
    Sprache: Unbekannt
    Verlag: Frontiers Media SA
    Publikationsdatum: 2023
    ZDB Id: 2587355-6
    SSG: 15,3
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  • 3
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    Screening of osteoporosis and sarcopenia in individuals aged 50 years and older at different altitudes in Yunnan province: Protocol of a longitudinal cohort study
    Frontiers Media SA ; 2022
    In:  Frontiers in Endocrinology Vol. 13 ( 2022-11-14)
    Details
    In: Frontiers in Endocrinology, Frontiers Media SA, Vol. 13 ( 2022-11-14)
    Kurzfassung: Musculoskeletal system gradually degenerates with aging, and a hypoxia environment at a high altitude may accelerate this process. However, the comprehensive effects of high-altitude environments on bones and muscles remain unclear. This study aims to compare the differences in bones and muscles at different altitudes, and to explore the mechanism and influencing factors of the high-altitude environment on the skeletal muscle system. Methods This is a prospective, multicenter, cohort study, which will recruit a total of 4000 participants over 50 years from 12 research centers with different altitudes (50m~3500m). The study will consist of a baseline assessment and a 5-year follow-up. Participants will undergo assessments of demographic information, anthropomorphic measures, self-reported questionnaires, handgrip muscle strength assessment (HGS), short physical performance battery (SPPB), blood sample analysis, and imaging assessments (QCT and/or DXA, US) within a time frame of 3 days after inclusion. A 5-year follow-up will be conducted to evaluate the changes in muscle size, density, and fat infiltration in different muscles; the muscle function impairment; the decrease in BMD; and the osteoporotic fracture incidence. Statistical analyses will be used to compare the research results between different altitudes. Multiple linear, logistic regression and classification tree analyses will be conducted to calculate the effects of various factors (e.g., altitude, age, and physical activity) on the skeletal muscle system in a high-altitude environment. Finally, a provisional cut-off point for the diagnosis of sarcopenia in adults at different altitudes will be calculated. Ethics and dissemination The study has been approved by the institutional research ethics committee of each study center (main center number: KHLL2021-KY056). Results will be disseminated through scientific conferences and peer-reviewed publications, as well as meetings with stakeholders. Clinical Trial registration number http://www.chictr.org.cn/index.aspx , identifier ChiCTR2100052153.
    Materialart: Online-Ressource
    ISSN: 1664-2392
    URL: Article
    DOI: 10.3389/fendo.2022.1010102
    Sprache: Unbekannt
    Verlag: Frontiers Media SA
    Publikationsdatum: 2022
    ZDB Id: 2592084-4
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  • 4
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    Table_8.xlsx
    Frontiers Media SA ; 2021
    In:  Frontiers in Immunology Vol. 12 ( 2021-4-14)
    Details
    In: Frontiers in Immunology, Frontiers Media SA, Vol. 12 ( 2021-4-14)
    Kurzfassung: Primary Sjogren’s syndrome (pSS) is a chronic progressive autoimmune disease with clinical phenotypic “Sicca symptoms”. In some cases, the diagnosis of pSS is delayed by 6–7 years due to the inefficient differential diagnosis of pSS and non-SS “Sicca”. This study aimed to investigate the difference between these two diseases, and in particular, their immunopathogenesis. Based on their gene expression profiles, we systematically defined for the first time the predicted disease-specific immune infiltration pattern of patients with pSS differentiated from normal donors and patients with non-SS “Sicca”. We found that it was characterized by the aberrant abundance and interaction of tissue-infiltrated immune cells, such as a notable shift in the subpopulation of six immune cells and the perturbed abundance of nine subpopulations, such as CD4+ memory, CD8+ T-cells and gamma delta T-cells. In addition, we identified essential genes, particularly long non-coding RNAs (lncRNAs), as the potential mechanisms linked to this predicted pattern reprogramming. Fourteen lncRNAs were identified as the potential regulators associated with the pSS-specific immune infiltration pattern in a synergistic manner, among which the CTA-250D10.23 lncRNA was highly relevant to chemokine signaling pathways. In conclusion, aberrant predicted disease-specific immune infiltration patterns and relevant genes revealed the immunopathogenesis of pSS and provided some clues for the immunotherapy by targeting specific immune cells and genes.
    Materialart: Online-Ressource
    ISSN: 1664-3224
    URL: Article
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    DOI: 10.3389/fimmu.2021.624614
    DOI: 10.3389/fimmu.2021.624614.s001
    DOI: 10.3389/fimmu.2021.624614.s002
    DOI: 10.3389/fimmu.2021.624614.s003
    DOI: 10.3389/fimmu.2021.624614.s004
    DOI: 10.3389/fimmu.2021.624614.s005
    DOI: 10.3389/fimmu.2021.624614.s006
    DOI: 10.3389/fimmu.2021.624614.s007
    DOI: 10.3389/fimmu.2021.624614.s008
    DOI: 10.3389/fimmu.2021.624614.s009
    DOI: 10.3389/fimmu.2021.624614.s010
    DOI: 10.3389/fimmu.2021.624614.s011
    Sprache: Unbekannt
    Verlag: Frontiers Media SA
    Publikationsdatum: 2021
    ZDB Id: 2606827-8
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  • 5
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    DataSheet1.PDF
    Frontiers Media SA ; 2022
    In:  Frontiers in Cell and Developmental Biology Vol. 10 ( 2022-5-11)
    Details
    In: Frontiers in Cell and Developmental Biology, Frontiers Media SA, Vol. 10 ( 2022-5-11)
    Kurzfassung: Long noncoding RNAs (lncRNAs) have emerged as vital regulators of gene expression during embryonic stem cell (ESC) self-renewal and differentiation. Here, we systemically analyzed the differentially regulated lncRNAs during ESC-derived cardiomyocyte (CM) differentiation. We established a perspicuous profile of lncRNA expression at four critical developmental stages and found that the differentially expressed lncRNAs were grouped into six distinct clusters. The cluster with specific expression in ESC enriches the largest number of lncRNAs. Investigation of lncRNA-protein interaction network revealed that they are not only controlled by classic key transcription factors, but also modulated by epigenetic and epitranscriptomic factors including N 6 -methyladenosine (m 6 A) effector machineries. A detailed inspection revealed that 28 out of 385 lncRNAs were modified by methylation as well as directly recruited by the nuclear m 6 A reader protein Ythdc1. Unlike other 27 non-coding transcripts, the ESC-specific lncRNA Gm2379 , located in both nucleus and cytoplasm, becomes dramatically upregulated in response to the depletion of m 6 A or Ythdc1. Consistent with the role of m 6 A in cell fate regulation, depletion of Gm2379 results in dysregulated expressions of pluripotent genes and crucial genes required for the formation of three germ layers. Collectively, our study provides a foundation for understanding the dynamic regulation of lncRNA transcriptomes during ESC differentiation and identifies the interplay between epitranscriptomic modification and key lncRNAs in the regulation of cell fate decision.
    Materialart: Online-Ressource
    ISSN: 2296-634X
    URL: Article
    URL: Article
    DOI: 10.3389/fcell.2022.880674
    DOI: 10.3389/fcell.2022.880674.s001
    Sprache: Unbekannt
    Verlag: Frontiers Media SA
    Publikationsdatum: 2022
    ZDB Id: 2737824-X
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  • 6
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    Table_1.xlsx
    Frontiers Media SA ; 2023
    In:  Frontiers in Oncology Vol. 13 ( 2023-9-7)
    Details
    In: Frontiers in Oncology, Frontiers Media SA, Vol. 13 ( 2023-9-7)
    Kurzfassung: Previous genetic-epidemiological studies considered TERT (rs2736100), CCDC26 (rs4295627), CDKN2A/B (rs4977756) and RTEL1 (rs6010620) gene polymorphisms as the risk factors specific to glioma. However, the data samples of previous genetic-epidemiological studies are modest to determine whether they have definite association with glioma. Method The study paid attention to systematically searching databases of PubMed, Embase, Web of Science (WoS), Scopus, Cochrane Library and Google Scholars. Meta-analysis under 5 genetic models, namely recessive model (RM), over-dominant model (O-DM), allele model (AM), co-dominant model (C-DM) and dominant model (DM) was conducted for generating odds ratios (ORs) and 95% confidence intervals (CIs). That was accompanied by subgroup analyses according to various racial groups. The software STATA 17.0 MP was implemented in the study. Result 21 articles were collected. According to data analysis results, in four genetic models (AM, RM, DM and C-DM) TERT gene rs2736100 polymorphism, CCDC26 gene rs4295627 polymorphism, CDKN2A/B gene rs4977756 polymorphism and RTEL1 gene rs6010620 polymorphisms increased the risk of glioma in Caucasians to different degrees. In Asian populations, the CCDC26 gene rs4295627 polymorphism and CDKN2A/B gene rs4977756 polymorphism did not exhibit a relevance to the risk of glioma. It is suggested to cautiously explain these results as the sample size is small. Conclusion The current meta-analysis suggested that the SNP of TERT (rs2736100), CCDC26 (rs4295627), CDKN2A/B (rs4977756) and RTEL1 (rs6010620) genes in glioma might increase risk of glioma, but there are ethnic differences. Further studies evaluating these polymorphisms and glioma risk are warranted.
    Materialart: Online-Ressource
    ISSN: 2234-943X
    URL: Article
    URL: Article
    DOI: 10.3389/fonc.2023.1180099
    DOI: 10.3389/fonc.2023.1180099.s001
    Sprache: Unbekannt
    Verlag: Frontiers Media SA
    Publikationsdatum: 2023
    ZDB Id: 2649216-7
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  • 7
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    The Role of Vitamin D in Combination Treatment for Patients With Rheumatoid Arthritis
    Frontiers Media SA ; 2020
    In:  Frontiers in Medicine Vol. 7 ( 2020-7-15)
    Details
    In: Frontiers in Medicine, Frontiers Media SA, Vol. 7 ( 2020-7-15)
    Materialart: Online-Ressource
    ISSN: 2296-858X
    URL: Article
    DOI: 10.3389/fmed.2020.00312
    Sprache: Unbekannt
    Verlag: Frontiers Media SA
    Publikationsdatum: 2020
    ZDB Id: 2775999-4
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  • 8
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    Whole-lesion histogram analysis of multiple diffusion metrics for differentiating lung cancer from inflammatory lesions
    Frontiers Media SA ; 2023
    In:  Frontiers in Oncology Vol. 12 ( 2023-1-18)
    Details
    In: Frontiers in Oncology, Frontiers Media SA, Vol. 12 ( 2023-1-18)
    Kurzfassung: Whole-lesion histogram analysis can provide comprehensive assessment of tissues by calculating additional quantitative metrics such as skewness and kurtosis; however, few studies have evaluated its value in the differential diagnosis of lung lesions. Purpose To compare the diagnostic performance of conventional diffusion-weighted imaging (DWI), intravoxel incoherent motion (IVIM) magnetic resonance imaging (MRI) and diffusion kurtosis imaging (DKI) in differentiating lung cancer from focal inflammatory lesions, based on whole-lesion volume histogram analysis. Methods Fifty-nine patients with solitary pulmonary lesions underwent multiple b -values DWIs, which were then postprocessed using mono-exponential, bi-exponential and DKI models. Histogram parameters of the apparent diffusion coefficient (ADC), true diffusivity ( D ), pseudo-diffusion coefficient ( D* ), and perfusion fraction ( f ), apparent diffusional kurtosis (K app ) and kurtosis-corrected diffusion coefficient (D app ) were calculated and compared between the lung cancer and inflammatory lesion groups. Receiver operating characteristic (ROC) curves were constructed to evaluate the diagnostic performance. Results The ADC mean , ADC median , D mean and D median values of lung cancer were significantly lower than those of inflammatory lesions, while the ADC skewness , K app mean , K app median , K app SD , K app kurtosis and D app skewness values of lung cancer were significantly higher than those of inflammatory lesions (all p & lt; 0.05). ADC skewness ( p = 0.019) and D median ( p = 0.031) were identified as independent predictors of lung cancer. D median showed the best performance for differentiating lung cancer from inflammatory lesions, with an area under the ROC curve of 0.777. Using a D median of 1.091 × 10 -3 mm 2 /s as the optimal cut-off value, the sensitivity, specificity, positive predictive value and negative predictive value were 69.23%, 85.00%, 90.00% and 58.62%, respectively. Conclusions Whole-lesion histogram analysis of DWI, IVIM and DKI parameters is a promising approach for differentiating lung cancer from inflammatory lesions, and D median shows the best performance in the differential diagnosis of solitary pulmonary lesions.
    Materialart: Online-Ressource
    ISSN: 2234-943X
    URL: Article
    DOI: 10.3389/fonc.2022.1082454
    Sprache: Unbekannt
    Verlag: Frontiers Media SA
    Publikationsdatum: 2023
    ZDB Id: 2649216-7
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  • 9
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    Table_1.XLSX
    Frontiers Media SA ; 2022
    In:  Frontiers in Microbiology Vol. 13 ( 2022-7-26)
    Details
    In: Frontiers in Microbiology, Frontiers Media SA, Vol. 13 ( 2022-7-26)
    Kurzfassung: The giant panda has been considered to maximize nutritional intake including protein and soluble carbohydrates in bamboo, but it has spent almost entire life with the high-cellulose diet. Whether giant panda is still helpless about digesting bamboo cellulose or not is always contentious among many researchers around the world. The work has systematically clarified this issue from the perspectives of digestive enzymes, functional genes, and microbial structures in giant panda gut. The intestinal cellulase activities of panda increase with bamboo consumption, performing that the endoglucanase activity of adults reaches 10-fold that of pandas first consuming bamboo. More abundance and types of microbial endoglucanase genes occur in bamboo-diet giant panda gut, and the corresponding GH5 gene cluster is still efficiently transcribed. Gut microbes possessing cellulose-degrading genes, belong to the phylum Firmicutes and some Bacteroidetes, but their structural and functional configurations are insufficient to completely degrade cellulose. Therefore, giant panda is striving to digest cellulose in bamboo, but this adaptation is incomplete. This is probably related to the short straight carnivore-like gut structure of the giant panda, preventing the colonization of some efficient functional but anaerobic-preferred flora.
    Materialart: Online-Ressource
    ISSN: 1664-302X
    URL: Article
    URL: Article
    URL: Article
    DOI: 10.3389/fmicb.2022.926515
    DOI: 10.3389/fmicb.2022.926515.s001
    DOI: 10.3389/fmicb.2022.926515.s002
    Sprache: Unbekannt
    Verlag: Frontiers Media SA
    Publikationsdatum: 2022
    ZDB Id: 2587354-4
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  • 10
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    Table_6.docx
    Frontiers Media SA ; 2023
    In:  Frontiers in Aging Neuroscience Vol. 15 ( 2023-2-15)
    Details
    In: Frontiers in Aging Neuroscience, Frontiers Media SA, Vol. 15 ( 2023-2-15)
    Kurzfassung: Mild cognitive impairment (MCI) is a multifactorial and complex central neurodegenerative disease. Acupuncture appears to be an effective method for cognitive function improvement in MCI patients. Neural plasticity remaining in the MCI brain implies that acupuncture-associated benefits may not be limited to the cognitive function. Instead, neurological alternations in the brain play a vital role in corresponding to the cognitive improvement. However, previous studies have mainly focused on the effects of cognitive function, leaving neurological findings relatively unclear. This systematic review summarized existing studies that used various brain imaging techniques to explore the neurological effect regarding acupuncture use for MCI treatment. Potential neuroimaging trials were searched, collected, and identified independently by two researchers. Four Chinese databases, four English databases, and additional sources were searched to identify studies reporting the use of acupuncture for MCI from the inception of databases until 1 June 2022. Methodological quality was appraised using the Cochrane risk-of-bias tool. In addition, general, methodological, and brain neuroimaging information was extracted and summarized to investigate the potential neural mechanisms by which acupuncture affects patients with MCI. In total, 22 studies involving 647 participants were included. The methodological quality of the included studies was moderate to high. The methods used included functional magnetic resonance imaging, diffusion tensor imaging, functional near-infrared spectroscopy, and magnetic resonance spectroscopy. Acupuncture-induced brain alterations observed in those patients with MCI tended to be observable in the cingulate cortex, prefrontal cortex, and hippocampus. The effect of acupuncture on MCI may play a role in regulating the default mode network, central executive network, and salience network. Based on these studies, researchers could extend the recent research focus from the cognitive domain to the neurological level. Future researches should develop additional relevant, well-designed, high-quality, and multimodal neuroimaging researches to detect the effects of acupuncture on the brains of MCI patients.
    Materialart: Online-Ressource
    ISSN: 1663-4365
    URL: Article
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    DOI: 10.3389/fnagi.2023.1007436
    DOI: 10.3389/fnagi.2023.1007436.s001
    DOI: 10.3389/fnagi.2023.1007436.s002
    DOI: 10.3389/fnagi.2023.1007436.s003
    DOI: 10.3389/fnagi.2023.1007436.s004
    DOI: 10.3389/fnagi.2023.1007436.s005
    DOI: 10.3389/fnagi.2023.1007436.s006
    Sprache: Unbekannt
    Verlag: Frontiers Media SA
    Publikationsdatum: 2023
    ZDB Id: 2558898-9
    Standort Signatur Einschränkungen Verfügbarkeit
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