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Li G, Wang X, Wang X, Guan Z, Guo J, Wang F, Zhang J, Niu B, Zhang T, Wang J, Yang J. Polymorphism rs1052536 in Base Excision Repair Gene Is a Risk Factor in a High-Risk Area of Neural Tube Defects in China. Med Sci Monit 2018; 24:5015-5026. [PMID: 30022792 PMCID: PMC6067017 DOI: 10.12659/msm.907492] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Background DNA Base Excision Repair Gene-DNA LigaseIII (LIG3) is an important repair gene in the repair pathway and plays an important role in maintaining the integrity of mitochondria. Rs1052536 and rs3135967 polymorphisms of the gene are associated with lung cancer, keratoconus, and Fuchs endothelial corneal dystrophy. There is no previously published report on the relationship between the polymorphisms and neural tube defects (NTDs). Material/Methods Mass ARRAY iPLEX was used to determine the distribution of the polymorphisms in the case group of 108 NTD pregnant women and a control group of 233 normal healthy pregnant women to examine the relevance of their polymorphisms and NTD occurrence. Results The homozygotes of rs1052536 TT were associated with an increased risk for NTDs than CC (P=0.014, OR=2.31, 95%CI [1.17–4.54]), and variants of rs1052536 T were associated with an increased risk of NTDs (P=0.024, OR=1.50, 95%CI [1.06–2.13]). The stratified analysis showed that TT genotype of rs1052536 increased the risk of anencephaly (P=0.016, OR=2.69, 95%CI [1.18–6.10]) and the T allele significantly increased the risk of cranial NTDs (P=0.033, OR=1.56, 95%CI [1.04–2.35]). Conclusions Rs1052536 in LIG3 gene might be a potential genetic risk factor in a high-risk area of NTDs in China.
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Niu B, Xiao K, Huang X, Zhang Z, Kong XY, Wang Z, Wen L, Jiang L. High-Sensitivity Detection of Iron(III) by Dopamine-Modified Funnel-Shaped Nanochannels. ACS APPLIED MATERIALS & INTERFACES 2018; 10:22632-22639. [PMID: 29888900 DOI: 10.1021/acsami.8b05686] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Iron as an essential trace element in the human body participates in various biological processes. The demand for efficient and sensitive detection of FeIII has drawn wide attentions. Inspired by biological nanochannels, a high-sensitivity, economic, and recyclable FeIII detection method is proposed by using dopamine (DOPA)-modified funnel-shaped nanochannels. Along with the FeIII concentration changing, different FeIII-DOPA chelates are generated in the channel, which affect the wettability and charge distribution of the pore surface, resulting in a change of ionic current through the nanochannels. Meanwhile, the funnel-shaped nanochannel applied in this work with a narrow cylindrical segment (a diameter close to 10 nm) as the critical section can enhance the sensing ability to the ultra-trace level (down to 10-12 M). We expound the mechanism and feasibility of this method and anticipate that the system can be a good example to design highly sensitive and stable ion detection devices.
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Yue H, Zhu X, Li S, Wang F, Wang X, Guan Z, Zhu Z, Niu B, Zhang T, Guo J, Wang J. Relationship Between INPP5E Gene Expression and Embryonic Neural Development in a Mouse Model of Neural Tube Defect. Med Sci Monit 2018; 24:2053-2059. [PMID: 29626185 PMCID: PMC5903545 DOI: 10.12659/msm.906095] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Background The INPP5E gene encodes for the inositol polyphosphate-5-phosphatase (INPP5E) 72 kDa protein that regulates the phosphoinositide signaling pathway and other cellular activities, but the functional role of this gene in embryonic neurodevelopment and neural tube defect (NTD) remains unclear. The aim of this study was to use a mouse model of NTD to investigate the expression levels of the INPP5E gene during neural development and the occurrence of NTD. Material/Methods In an established NTD mouse model, stereoscopy was used to look for morphological defects. Transcription and expression levels of the INPP5E gene in neural tissues were detected using real-time fluorescence quantitative polymerase chain reaction (PCR) and Western blotting in the NTD mouse embryos and compared with control mouse embryos. Results The expression levels of the INPP5E gene decreased as embryonic development progressed in the neural tissue of control mice embryos, but showed no obvious trend in the neural tissues of the NTD mouse embryos. The expression levels of the INPP5E gene in NTD mouse embryos were significantly lower compared with control embryos, at the time of neural tube closure (gestational day 11.5). Conclusions The INPP5E gene regulates the process of embryonic neural development. Abnormal levels of expression of the INPP5E gene may contribute to NTDs. Increased knowledge of the expression pattern of the INPP5E gene may lead to an advanced understanding of the molecular mechanism of embryonic neurodevelopment and identify more specific directions to explore potential treatments for NTDs associated with abnormalities in INPP5E gene expression levels.
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Cao LJ, Liu JH, Shuai JF, Niu B, Lu SK, Huang KL. [Efficacy of early treatment via fiber bronchoscope in children with Mycoplasma pneumoniae pneumonia complicated by airway mucus obstruction]. ZHONGGUO DANG DAI ER KE ZA ZHI = CHINESE JOURNAL OF CONTEMPORARY PEDIATRICS 2018; 20:298-302. [PMID: 29658455 PMCID: PMC7390028 DOI: 10.7499/j.issn.1008-8830.2018.04.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 12/31/2017] [Accepted: 02/08/2018] [Indexed: 06/08/2023]
Abstract
OBJECTIVE To study the efficacy of early treatment via fiber bronchoscope in children with Mycoplasma pneumoniae pneumonia (MPP) complicated by airway mucus obstruction. METHODS According to the time from admission to the treatment via fiber bronchoscope, the children with MPP who were found to have airway mucus obstruction under a fiber bronchoscope were randomly divided into early intervention group (≤3 days; n=40) and late intervention group (>3 days; n=56). The two groups were compared in terms of clinical data and imaging recovery.The children were followed for 1-3 months. RESULTS Of the 96 children, 38 were found to have the formation of plastic bronchial tree, among whom 10 were in the early intervention group and 28 were in the late intervention group (P=0.01). Compared with the late intervention group, the early intervention group had a shorter duration of fever, length of hospital stay, and time to the recovery of white blood cell count and C-reactive protein (P<0.05), as well as a higher atelectasis resolution rate (P<0.05). Compared with the late intervention group, the early intervention group had a higher percentage of children with a ≥ 60% absorbed area of pulmonary consolidation at discharge. After 3 months of follow-up, the early intervention group had a higher percentage of children with a ≥ 90% absorbed area of pulmonary consolidation than the late intervention group (80% vs 55%; P=0.01), and the early intervention group had a lower incidence rate of atelectasis than the late intervention group (P<0.05). CONCLUSIONS Early treatment via fiber bronchoscope can shorten the course of the disease and reduce complications and sequelae in MPP children with airway mucus obstruction.
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Lin W, Yi J, Zhang Y, Deng Z, Chen Q, Niu B. Effects of glutaraldehyde–didecyldimethylammonium bromide combined disinfectant on the cell surface of
Staphylococcus aureus. J Appl Microbiol 2018; 124:1060-1070. [DOI: 10.1111/jam.13702] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 12/27/2017] [Accepted: 01/04/2018] [Indexed: 01/23/2023]
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Chen Z, Niu B, Zhang L, Xu Z. Vacuum pyrolysis characteristics and parameter optimization of recycling organic materials from waste tantalum capacitors. JOURNAL OF HAZARDOUS MATERIALS 2018; 342:192-200. [PMID: 28829984 DOI: 10.1016/j.jhazmat.2017.08.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Revised: 07/25/2017] [Accepted: 08/09/2017] [Indexed: 06/07/2023]
Abstract
Recycling rare metal tantalum from waste tantalum capacitors (WTCs) is significant to alleviate the shortage of tantalum resource. However, environmental problems will be caused if the organic materials from WTCs are improperly disposed. This study presented a promising vacuum pyrolysis technology to recycle the organic materials from WTCs. The organics removal rate could reach 94.32wt% according to TG results. The optimal parameters were determined as 425°C, 50Pa and 30min on the basis of response surface methodology (RSM). The oil yield and residual rate was 18.09wt% and 74.94wt%, respectively. All pyrolysis products can be recycled through a reasonable route. Besides, to deeply understand the pyrolysis process, the pyrolysis mechanism was also proposed based on the product and free radical theory. This paper provides an efficient process for recycling the organic material from WTCs, which can facilitate the following tantalum recovery.
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Zhang R, Sun X, Niu B. The importance of pegaptanib sodium treatment for patients with vascular active vitreoretinopathy. Exp Ther Med 2017; 14:6002-6006. [PMID: 29285149 PMCID: PMC5740564 DOI: 10.3892/etm.2017.5307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 09/18/2017] [Indexed: 11/05/2022] Open
Abstract
The aim of the present study was to report the importance of pegaptanib sodium (PGSD) injection treatment for vascular active vitreoretinopathy (VAVR). A total of 82 patients with VAVR diagnosed by increasing subretinal exudation were enrolled and received a single intravitreal injection of PGSD. The efficacies of PGSD for patients with VAVR were analyzed using photography, fluorescein angiography and optical coherence tomography. The pathological changes in vascular activity, amount of exudation and visual acuity between the PGSD, and placebo group were also compared. The results demonstrated that the PGSD injection significantly decreased subretinal exudation and leakage compared with the placebo when assessed using fluorescein angiography in a 12-month follow-up. It was observed that the PGSD injection inhibited inflammatory cytokines interleukin-1β and tumor necrosis factor α for patients with VAVR compared with the placebo. Furthermore, results demonstrated that the average inflammation score and intraocular pressure was significantly decreased compared with the placebo. Visual acuity was improved from 1.3 to 0.7 in the majority of patients in the PGSD group. In conclusion, the outcomes of the present study indicate that the PGSD intravitreal injection is an efficient treatment option for patients with VAVR.
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Wang X, Guan Z, Dong Y, Zhu Z, Wang J, Niu B. Inhibition of thymidylate synthase affects neural tube development in mice. Reprod Toxicol 2017; 76:17-25. [PMID: 29258758 DOI: 10.1016/j.reprotox.2017.12.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 06/26/2017] [Accepted: 12/14/2017] [Indexed: 11/28/2022]
Abstract
Thymidylate synthase (TYMS) is a key enzyme in the de novo synthesis of 2'-deoxythymidine-5'-monophosphate (dTMP) from 2'-deoxyuridine-5'-monophosphate (dUMP). Our aim was to investigate the role of dTMP dysmetabolism via inhibition of TYMS by an inhibitor, 5-fluorouracil (5-FU) in the occurrence of neural tube defects (NTDs). We found that a high incidence of NTDs occurred after treatment with 5-FU at 12.5 mg/kg body weight. TYMS activity was significantly inhibited with decreased dTMP and accumulation of dUMP after 5-FU injection. The proliferation of neuroepithelial cells were markedly inhibited in NTDs compared with control. Expressions of proliferating cell nuclear antigen and phosphohistone H3 were significantly decreased in NTDs, while phosphorylated replication protein A2, P53 and Caspase3 were significantly increased in NTDs compared with control. These results indicated that inhibition of TYMS affected the balance between proliferation and apoptosis in neuroepithelial cells, which might shed some lights on the mechanisms involved in NTDs.
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Wang L, Lu S, Feng Z, Li L, Niu B, Shuai J, Cao L, Li G, Liu J. The early examination of combined serum and imaging data under flexible fiberoptic bronchoscopy as a novel predictor for refractory Mycoplasma pneumoniae pneumonia diagnosis. Medicine (Baltimore) 2017; 96:e9364. [PMID: 29390413 PMCID: PMC5815825 DOI: 10.1097/md.0000000000009364] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
The treatment role of flexible bronchoscopy (FOB) for pediatric refractory Mycoplasma pneumoniae pneumonia (RMPP) has been well documented. Besides, the application indication of FOB is also studied in patients with general MPP (GMPP), especially in those with large pulmonary lesions. This study was designed to examine the diagnostic value of bronchoscopic features for RMPP.The FOB and bronchoalveolar lavage (BAL) were adopted for pediatric patients who showed clinical and radiograph indications. On the basis of the final diagnosis on discharge, patients were divided into general and refractory MPP groups. The clinical, laboratory, and bronchoscopic imaging features were retrospectively investigated between these 2 groups.From June 2012 to May 2014, a total of 62 RMPP and 101 GMPP patients were treated with therapeutic bronchoscopy. The comparison analysis showed that the CRP, HBDH, LDH were significantly different between RMPP and GMPP groups (all P < .001). In the bronchoscopic imaging, the mucus plug was significantly more commonly seen in the RMPP group (P < .001). Receiver operating characteristic (ROC) analysis revealed that the combined serum, clinical, and FOB imaging data possessed greater specificity and sensitivity than serum and clinical data alone.Our data suggest that the combined serum, clinical, and bronchoscopic imaging data might serve as a promising predictor for early RMPP diagnosis for pediatric patients with large pulmonary lesions.
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Cores J, Hensley MT, Kinlaw K, Rikard SM, Dinh P, Paudel D, Tang J, Vandergriff AC, Allen TA, Li Y, Liu J, Niu B, Chi Y, Caranasos T, Lobo LJ, Cheng K. Safety and Efficacy of Allogeneic Lung Spheroid Cells in a Mismatched Rat Model of Pulmonary Fibrosis. Stem Cells Transl Med 2017; 6:1905-1916. [PMID: 28783251 PMCID: PMC6430052 DOI: 10.1002/sctm.16-0374] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 06/01/2017] [Indexed: 12/22/2022] Open
Abstract
Idiopathic pulmonary fibrosis is a devastating interstitial lung disease characterized by the relentless deposition of extracellular matrix causing lung distortions and dysfunctions. The prognosis after detection is merely 3-5 years and the only two Food and Drug Administration-approved drugs treat the symptoms, not the disease, and have numerous side effects. Stem cell therapy is a promising treatment strategy for pulmonary fibrosis. Current animal and clinical studies focus on the use of adipose or bone marrow-derived mesenchymal stem cells. We, instead, have established adult lung spheroid cells (LSCs) as an intrinsic source of therapeutic lung stem cells. In the present study, we compared the efficacy and safety of syngeneic and allogeneic LSCs in immuno-competent rats with bleomycin-induced pulmonary inflammation in an effort to mitigate fibrosis development. We found that infusion of allogeneic LSCs reduces the progression of inflammation and fibrotic manifestation and preserves epithelial and endothelial health without eliciting significant immune rejection. Our study sheds light on potential future developments of LSCs as an allogeneic cell therapy for humans with pulmonary fibrosis. Stem Cells Translational Medicine 2017;9:1905-1916.
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Wu K, Xiao K, Chen L, Zhou R, Niu B, Zhang Y, Wen L. Biomimetic Voltage-Gated Ultrasensitive Potassium-Activated Nanofluidic Based on a Solid-State Nanochannel. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:8463-8467. [PMID: 28786687 DOI: 10.1021/acs.langmuir.7b01705] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In living organism, voltage-gated potassium channels play a crucial role and are largely responsible for various vital movements. For life science, it is significant and challenging to imitate and control the potassium ion transportation with a convenient artificial system. Here, we reported a voltage-gated ultrasensitive potassium-activated nanofluidic system using a 4'-aminobenzo-18-crown-6 molecule-functionalized funnel-shaped solid-state nanochannel. The switchlike property between open and closed states can be tuned freely by reversible immobilization and the release of potassium ions. By virtue of good reversibility and excellent stability, this system can potentially be applied in controlled drug release and biosensors.
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Xie Q, Li C, Song X, Wu L, Jiang Q, Qiu Z, Cao H, Yu K, Wan C, Li J, Yang F, Huang Z, Niu B, Jiang Z, Zhang T. Folate deficiency facilitates recruitment of upstream binding factor to hot spots of DNA double-strand breaks of rRNA genes and promotes its transcription. Nucleic Acids Res 2017; 45:2472-2489. [PMID: 27924000 PMCID: PMC5389733 DOI: 10.1093/nar/gkw1208] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Accepted: 11/22/2016] [Indexed: 12/24/2022] Open
Abstract
The biogenesis of ribosomes in vivo is an essential process for cellular functions. Transcription of ribosomal RNA (rRNA) genes is the rate-limiting step in ribosome biogenesis controlled by environmental conditions. Here, we investigated the role of folate antagonist on changes of DNA double-strand breaks (DSBs) landscape in mouse embryonic stem cells. A significant DSB enhancement was detected in the genome of these cells and a large majority of these DSBs were found in rRNA genes. Furthermore, spontaneous DSBs in cells under folate deficiency conditions were located exclusively within the rRNA gene units, representing a H3K4me1 hallmark. Enrichment H3K4me1 at the hot spots of DSB regions enhanced the recruitment of upstream binding factor (UBF) to rRNA genes, resulting in the increment of rRNA genes transcription. Supplement of folate resulted in a restored UBF binding across DNA breakage sites of rRNA genes, and normal rRNA gene transcription. In samples from neural tube defects (NTDs) with low folate level, up-regulation of rRNA gene transcription was observed, along with aberrant UBF level. Our results present a new view by which alterations in folate levels affects DNA breakage through epigenetic control leading to the regulation of rRNA gene transcription during the early stage of development.
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Niu B, Chen Z, Xu Z. Application of pyrolysis to recycling organics from waste tantalum capacitors. JOURNAL OF HAZARDOUS MATERIALS 2017; 335:39-46. [PMID: 28414947 DOI: 10.1016/j.jhazmat.2017.04.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 03/09/2017] [Accepted: 04/07/2017] [Indexed: 06/07/2023]
Abstract
Tantalum capacitors (TCs) are widely used in electronic appliances. The rapid replacement of electronic products results in generating large amounts of waste TCs (WTCs). WTCs, rich in valuable tantalum, are considered as high quality tantalum resources for recycling. However, environmental pollution will be caused if the organics of WTCs were not properly disposed. Therefore, effectively recycling the organics of WTCs is significant for recovering the valuable parts. This study proposed an argon (Ar) pyrolysis process to recycle the organics from WTCs. The organic decomposition kinetic was first analyzed by thermogravimetry. The results showed that the organics were decomposed in two major steps and the average activation energy was calculated to 234kJ/mol. Then, the suitable pyrolysis parameters were determined as 550°C, 30min and 100ml/min. The organics were effectively decomposed and converted to oils (mainly contained phenol homologs and benzene homologs) and gases (some hydrocarbon). These pyrolysis products could be reutilized as energy sources. Moreover, based on the products and bond energy theory, the pyrolysis mechanisms of the organics were also discussed. Finally, a reasonable technological process for products utilization was presented. This study contributes to the efficient recycling the organics before valuable material recovery from WTCs.
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Wang L, Shangguan S, Xin Y, Chang S, Wang Z, Lu X, Wu L, Niu B, Zhang T. Folate deficiency disturbs hsa-let-7 g level through methylation regulation in neural tube defects. J Cell Mol Med 2017. [PMID: 28631291 PMCID: PMC5706510 DOI: 10.1111/jcmm.13228] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Folic acid deficiency during pregnancy is believed to be a high‐risk factor for neural tube defects (NTDs). Disturbed epigenetic modifications, including miRNA regulation, have been linked to the pathogenesis of NTDs in those with folate deficiency. However, the mechanism by which folic acid‐regulated miRNA influences this pathogenesis remains unclear. It is believed that DNA methylation is associated with dysregulated miRNA expression. To clarify this issue, here we measured the methylation changes of 22 miRNAs in 57 human NTD cases to explore whether such changes are involved in miRNA regulation in NTD cases through folate metabolism. In total, eight of the 22 miRNAs tested reduced their methylation modifications in NTD cases, which provide direct evidence of the roles of interactions between DNA methylation and miRNA level in these defects. Among the findings, there was a significant association between folic acid concentration and hsa‐let‐7 g methylation level in NTD cases. Hypomethylation of hsa‐let‐7 g increased its own expression level in both NTD cases and cell models, which indicated that hsa‐let‐7 g methylation directly regulates its own expression. Overexpression of hsa‐let‐7 g, along with its target genes, disturbed the migration and proliferation of SK‐N‐SH cells, implying that hsa‐let‐7 g plays important roles in the prevention of NTDs by folic acid. In summary, our data suggest a relationship between aberrant methylation of hsa‐let‐7 g and disturbed folate metabolism in NTDs, implying that improvements in nutrition during early pregnancy may prevent such defects, possibly via the donation of methyl groups for miRNAs.
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90
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Niu B, Zhang F, Ping H, Li N, Zhou J, Lei L, Xie J, Zhang J, Wang W, Fu Z. Sol-gel Autocombustion Synthesis of Nanocrystalline High-entropy Alloys. Sci Rep 2017; 7:3421. [PMID: 28611380 PMCID: PMC5469749 DOI: 10.1038/s41598-017-03644-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Accepted: 05/02/2017] [Indexed: 11/24/2022] Open
Abstract
A reduction in the particle size is expected to improve the properties and increase the application potential of high-entropy alloys. Therefore, in this study, a novel sol–gel autocombustion technique was first used to synthesize high-entropy alloys. The average grain size of the prepared nanocrystalline CoCrCuNiAl high-entropy alloys showed was 14 nm with an excellent and uniform dispersion, exhibiting a distinct magnetic behavior similar to the superparamagnetic behavior. We show that the metal nitrates first form (Co,Cu,Mg,Ni,Zn)O high-entropy oxides, and then in situ reduce to CoCrCuNiAl high-entropy alloys by the reducing gases, and the chelation between citric acid and the metal ions and the in situ chemical reactions are the dominant reaction mechanisms. We demonstrate that the sol–gel autocombustion process is an efficient way to synthesize solid solution alloys eluding the restriction of a high mixing entropy.
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Tian X, Tian X, Huo R, Chang Q, Zheng G, Du Y, Chen Y, Niu B. Bacillus Calmette-Guerin alleviates airway inflammation and remodeling by preventing TGF-β 1 induced epithelial-mesenchymal transition. Hum Vaccin Immunother 2017; 13:1758-1764. [PMID: 28441064 DOI: 10.1080/21645515.2017.1313366] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
Bacillus Calmette-Guerin (BCG) is a potent agent for the prevention of tuberculosis. Current studies have regarded BCG as an immunomodulator. However, there is little information on whether it can be used to inhibit airway inflammation and airway remodeling caused by asthma. Therefore, in this study, we investigate the role of epithelial-mesenchymal transition (EMT) in airway inflammation and airway remodeling as well as the possible therapeutic mechanism of BCG for the treatment of asthma. Wistar rats were sensitized and challenged by ovalbumin for 2 weeks or 8 weeks. BCG was subcutaneously administered daily before every ovalbumin challenge to determine its therapeutic effects. The 2 weeks model group showed extensive eosinophilia, chronic inflammatory responses, bronchial wall thickening, airway epithelium damage, increased levels of transforming growth factor β 1 (TGF-β1) in both bronchoalveolar lavage fluid and sera, decreased expression of epithelial marker E-cadherin, and increased expressions of mesenchymal markers α-smooth muscle actin (α-SMA) and Fibronectin (Fn). Except for inflammatory responses, all responses were more significant in the 8 weeks model group which displayed characteristics of airway remodeling including subepithelial fibrosis, smooth muscle hypertrophy, and goblet cell hyperplasia. When compared with the model groups, BCG administration inhibited airway inflammation and airway remodeling, decreased TGF-β1 levels, upregulated expression of E-cadherin, and downregulated expression of α-SMA and Fn. The present study suggests for the first time that increased secretion of TGF- β1 induced by asthmatic chronic inflammation may result in EMT, which is one of the most important mechanisms of airway inflammation and airway remodeling seen with asthma. BCG alleviates airway inflammation and airway remodeling by preventing TGF-β1 induced EMT, therefore BCG may be a new therapy for treating asthma.
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Niu B, Xiao JY, Fang Y, Zhou BY, Li J, Cao F, Tian YK, Mei W. Sevoflurane-induced isoelectric EEG and burst suppression: differential and antagonistic effect of added nitrous oxide. Anaesthesia 2017; 72:570-579. [PMID: 28272748 PMCID: PMC5413860 DOI: 10.1111/anae.13843] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/26/2017] [Indexed: 01/04/2023]
Abstract
The objective of this study was to investigate whether nitrous oxide influenced the ED50 of sevoflurane for induction of isoelectric electroencephalogram (ED50isoelectric ) differently from its influence on the ED50 of sevoflurane for electroencephalogram burst suppression (ED50burst ). In a prospective, randomised, double-blind, parallel group, up-down sequential allocation study, 77 ASA physical status 1 and 2 patients received sevoflurane induction and, after tracheal intubation, were randomly allocated to receive sevoflurane with either 40% oxygen in air (control group) or 60% nitrous oxide in oxygen mixture (nitrous group). The ED50isoelectric in the two groups was determined using Dixon's up and down method, starting at 2.5% with 0.2% step size of end-tidal sevoflurane. The electroencephalogram was considered as isoelectric when a burst suppression ratio of 100% lasted > 1 min. The subsequent concentrations of sevoflurane administered were determined by the presence or absence of isoelectric electroencephalogram in the previous patient in the same group. The ED50isoelectric in the nitrous group 4.08 (95%CI, 3.95-4.38)% was significantly higher than that in the control group 3.68 (95%CI, 3.50-3.78)% (p < 0.0001). The values for ED50burst were 3.05 (95%CI, 2.66-3.90)% and 3.02 (95%CI, 3.00-3.05)% in nitrous group and control group, respectively (p = 0.52). The addition of 60% nitrous oxide increases ED50isoelectric , but not the ED50burst of sevoflurane. Neither result indicates an additive effect of anaesthetic agents, as might be expected, and possible reasons for this are discussed.
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Chen X, An Y, Gao Y, Guo L, Rui L, Xie H, Sun M, Lam Hung S, Sheng X, Zou J, Bao Y, Guan H, Niu B, Li Z, Finnell RH, Gusella JF, Wu BL, Zhang T. Rare Deleterious PARD3 Variants in the aPKC-Binding Region are Implicated in the Pathogenesis of Human Cranial Neural Tube Defects Via Disrupting Apical Tight Junction Formation. Hum Mutat 2017; 38:378-389. [PMID: 27925688 DOI: 10.1002/humu.23153] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 11/28/2016] [Indexed: 12/25/2022]
Abstract
Increasing evidence that mutation of planar cell polarity (PCP) genes contributes to human cranial neural tube defect (NTD) susceptibility prompted us to hypothesize that rare variants of genes in the core apical-basal polarity (ABP) pathway are risk factors for cranial NTDs. In this study, we screened for rare genomic variation of PARD3 in 138 cranial NTD cases and 274 controls. Overall, the rare deleterious variants of PARD3 were significantly associated with increased risk for cranial NTDs (11/138 vs.7/274, P < 0.05, OR = 3.3). These NTD-specific variants were significantly enriched in the aPKC-binding region (6/138 vs. 0/274, P < 0.01). The East Asian cohort in the ExAC database and another Chinese normal cohort further supported this association. Over-expression analysis in HEK293T and MDCK cells confirmed abnormal aPKC binding or interaction for two PARD3 variants (p.P913Q and p.D783G), resulting in defective tight junction formation via disrupted aPKC binding. Functional analysis in human neural progenitor cells and chick embryos revealed that PARD3 knockdown gave rise to abnormal cell polarity and compromised the polarization process of neuroepithelial tissue. Our studies suggest that rare deleterious variants of PARD3 in the aPKC-binding region contribute to human cranial NTDs, possibly by disrupting apical tight junction formation and subsequent polarization process of the neuroepithelium.
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Lin W, Guan X, Cao J, Niu B, Chen Q. Bactericidal mechanism of glutaraldehyde-didecyldimethylammonium bromide as a disinfectant againstEscherichia coli. J Appl Microbiol 2017; 122:676-685. [DOI: 10.1111/jam.13384] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 12/05/2016] [Accepted: 12/09/2016] [Indexed: 11/29/2022]
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95
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Guo H, Cheng Y, Wang C, Wu J, Zou Z, Niu B, Yu H, Wang H, Xu J. FFPM, a PDE4 inhibitor, reverses learning and memory deficits in APP/PS1 transgenic mice via cAMP/PKA/CREB signaling and anti-inflammatory effects. Neuropharmacology 2017; 116:260-269. [PMID: 28065587 DOI: 10.1016/j.neuropharm.2017.01.004] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 12/25/2016] [Accepted: 01/05/2017] [Indexed: 12/25/2022]
Abstract
Thus far, phosphodiesterase-4 (PDE4) inhibitors have not been approved for application in Alzheimer's disease (AD) in a clinical setting due to severe side effects, such as nausea and vomiting. In this study, we investigated the effect of FFPM, a novel PDE4 inhibitor, on learning and memory abilities, as well as the underlying mechanism in the APP/PS1 mouse model of AD. Pharmacokinetic studies have revealed that FFPM efficiently permeates into the brain, and reached peak values in plasma 2 h after orally dosing. A 3-week treatment with FFPM, at doses of 0.25 mg/kg and 0.5 mg/kg, significantly improved the learning and memory abilities of APP/PS1 transgenic mice in the Morris water maze and the Step-down passive avoidance task. Interestingly, we found that while rolipram (0.5 mg/kg) reduced the duration of the α2 adrenergic receptor-mediated anesthesia induced by xylazine/ketamine, FFPM (0.5 mg/kg) or the vehicle did not have an evident effect. FFPM increased the cAMP, PKA and CREB phosphorylation and BDNF levels, and reduced the NF-κB p65, iNOS, TNF-α and IL-1β levels in the hippocampi of APP/PS1 trangenic mice, as observed by ELISA and Western blot analysis. Taken together, our data demonstrated that the reversal effect of FFPM on cognitive deficits in APP/PS1 transgenic mice might be related to stimulation of the cAMP/PKA/CREB/BDNF pathway and anti-inflammatory effects. Moreover, FFPM appears to have potential as an effective PDE4 inhibitor in AD treatment with little emetic potential.
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96
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Xu L, Wang L, Wang J, Zhu Z, Chang G, Guo Y, Tian X, Niu B. The effect of inhibiting glycinamide ribonucleotide formyl transferase on the development of neural tube in mice. Nutr Metab (Lond) 2016; 13:56. [PMID: 27555878 PMCID: PMC4994272 DOI: 10.1186/s12986-016-0114-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Accepted: 08/09/2016] [Indexed: 11/10/2022] Open
Abstract
Background Folate deficiency is closely related to the development of neural tube defects (NTDs). However, the exact mechanism is not completely understood. This study aims to induce murine NTDs by inhibiting one of the folate metabolic pathways, de novo purine synthesis and preliminarily investigate the potential mechanisms. The key enzyme, glycinamide ribonucleotide formyl transferase (GARFT) was inhibited by a specific inhibitor, lometrexol (DDATHF) in the pregnant mice. Methods Pregnant mice were intraperitoneally injected with various doses of DDATHF on gestational day 7.5 and embryos were examined for the presence of NTDs on gestational day 11.5. GARFT activity and levels of ATP, GTP, dATP and dGTP were detected in embryonic brain tissue. Proliferation and apoptosis was analyzed by real-time quantitative polymerase chain reaction (RT-qPCR), immunohistochemical assay and western blotting. Results 40 mg kg−1 body weight (b/w) of DDATHF caused the highest incidence of NTDs (30.8 %) and therefore was selected as the optimal dose to establish murine NTDs. The GARFT activity and levels of ATP, GTP, dATP and dGTP in embryonic brain tissue were significantly decreased after DDATHF treatment. Furthermore, Levels of proliferation-related genes (Pcna, Foxg1 and Ptch1) were downregulated and apoptosis-related genes (Bax, Casp8 and Casp9) were upregulated. Expression of phosphohistone H3 was significantly decreased while expression of cleaved caspase-3 was greatly increased. Conclusions Results indicate that DDATHF induced murine NTDs by disturbing purine metabolism and further led to abnormal proliferation and apoptosis. Electronic supplementary material The online version of this article (doi:10.1186/s12986-016-0114-x) contains supplementary material, which is available to authorized users.
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Guo J, Shi Y, Xu C, Zhong R, Zhang F, Niu B, Wang J, Zhang T. Data on the optimization of a GC-MS procedure for the determination of total plasma myo-inositol. Data Brief 2016; 8:1040-3. [PMID: 27508261 PMCID: PMC4969248 DOI: 10.1016/j.dib.2016.07.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 07/07/2016] [Accepted: 07/13/2016] [Indexed: 11/18/2022] Open
Abstract
Myo-inositol (MI) is one of the stereoisomers of hexahydroxycyclohexane, which plays an important role in intracellular signal pathway. Derivatization is an indispensable step in both external and internal standard method during the chromatography-mass spectrometer (GC-MS) detection, as MI can't be ionized directly. It is valuable to optimize the derivative process and the detection volume for clinical detection. This article contains optimization data related to research publication "Quantification of plasma myo-inositol using gas chromatography-mass spectrometry" [1]. Here we introduce the data on the optimized derivatization volume, temperature, duration and the detection volume.
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98
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Guo J, Shi Y, Xu C, Zhong R, Zhang F, Zhang T, Niu B, Wang J. Quantification of plasma myo-inositol using gas chromatography-mass spectrometry. Clin Chim Acta 2016; 460:88-92. [PMID: 27342997 DOI: 10.1016/j.cca.2016.06.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Revised: 06/17/2016] [Accepted: 06/20/2016] [Indexed: 10/21/2022]
Abstract
BACKGROUND Myo-inositol (MI) deficiency is associated with an increased risk for neural tube defects (NTDs), mental disorders and metabolic diseases. We developed a gas chromatography-mass spectrometry (GC-MS) method to detect MI in human plasma, which was accurate, relatively efficient and convenient for clinical application. METHODS An external standard method was used for determination of plasma MI. Samples were analyzed by GC-MS after derivatization. The stable-isotope labeled internal standard approach was used to validate the method's accuracy. Alpha fetal protein (AFP) was detected by chemiluminescence immunoassay. RESULTS The method was validated by determining the linearity, sensitivity and recovery rate. There was a good agreement between the internal standard approach and the present method. The NTD-affected pregnancies showed lower plasma MI (P=0.024) and higher AFP levels (P=0.001) than control. Maternal MI level showed a better discrimination in spina bifida subgroup, while AFP level showed a better discrimination in anencephaly subgroup after stratification analysis. CONCLUSIONS We developed a sensitive and reliable method for the detection of clinical plasma MI, which might be a marker for NTDs screening, and established fundamental knowledge for clinical diagnosis and prevention for the diseases related to disturbed MI metabolism.
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Yang H, Xiao L, Wang J, Meng J, Lv M, Liao D, Song J, Gao L, Xiong H, He Y, Niu B, Chuang X, Li H. Phylogenetic Characterization Genome Segment 2 of Bluetongue Virus
Strains Belonging to Serotypes 5, 7 and 24 Isolated for the First Time in China During 2012 to 2014. Transbound Emerg Dis 2016; 64:1317-1321. [DOI: 10.1111/tbed.12479] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2015] [Indexed: 11/29/2022]
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Li Y, Cheng Y, Zeng B, Niu B, Guo H, Li G, Feng H, Xu J, Yang X. Determination of a novel phosphodiesterase-4 inhibitor chlorbipram in mouse plasma and brain by UFLC–MS/MS: Application in pharmacokinetic studies after intravenous administration. J Chromatogr B Analyt Technol Biomed Life Sci 2015; 1007:49-53. [DOI: 10.1016/j.jchromb.2015.10.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Revised: 10/13/2015] [Accepted: 10/15/2015] [Indexed: 10/22/2022]
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