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Gao P, Lei T, Jia L, Song Y, Xing Y, Zhang Z, Yu D, Feng Y, Xing B. Exposure assessment of PM 2.5 during winter in outdoor and indoor environments of research center: spatial-temporal distribution, carbonaceous compositions and contributions of infiltration. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 573:854-861. [PMID: 27599049 DOI: 10.1016/j.scitotenv.2016.08.138] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 08/03/2016] [Accepted: 08/19/2016] [Indexed: 06/06/2023]
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Xing Y, Quan C, Tay CJ. Multi-subzone algorithm for absolute phase retrieval in digital fringe projection profilometry. APPLIED OPTICS 2016; 55:9774-9781. [PMID: 27958470 DOI: 10.1364/ao.55.009774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Codewords are important in encoded absolute phase retrieval techniques such as two-frequency, gray-code, and phase-coding. Each sinusoidal fringe is marked by a unique codeword so that an absolute fringe order can be determined by decoding the codeword. However, due to the limited number of unique codewords, sinusoidal fringe patterns do not contain high-frequency fringes without the use of additional patterns. A multi-subzone coding and decoding algorithm is thus proposed to overcome this limitation. Three multi-subzone coding methods based on two-frequency, gray-code, and phase-coding techniques are presented. The coding creates multiple subzones of unique codewords and the decoding enables it to use non-unique codewords to identify absolute fringe order. Specifically, the range of fringe order is estimated by the use of a wrapped phase map and the absolute fringe order is identified by a codeword. Experimental studies demonstrate the advantages of the proposed algorithm over existing coding methods. The proposed algorithm is suitable to measure objects with large step-height surface discontinuities.
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Li Y, Zhang L, Wang X, Chen M, Liu Y, Xing Y, Wang X, Gao S, Zhu D. Elk-1-mediated 15-lipoxygenase expression is required for hypoxia-induced pulmonary vascular adventitial fibroblast dynamics. Acta Physiol (Oxf) 2016; 218:276-289. [PMID: 27174674 DOI: 10.1111/apha.12711] [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: 11/01/2015] [Revised: 04/26/2016] [Accepted: 05/09/2016] [Indexed: 12/20/2022]
Abstract
AIM 15-Lipoxygenase (15-LO) is an important factor in the pathogenesis of pulmonary artery hypertension (PAH). However, the role of 15-LO in the adventitia of the pulmonary arterial wall is unclear. The aim of this study was to explore the role of 15-LO in the modulation of pulmonary adventitial fibroblast (PAF) dynamics. METHODS Rats were exposed to normoxic or hypoxic (fraction of inspired O2 = 0.12) treatments for 7 days. PAF proliferation and cell cycle alterations were measured by MTT assay, cell immunofluorescence, flow cytometry and Western blot analysis. The 15-LO promoter was analysed by luciferase reporter and ChIP assays. RESULTS Our results showed that hypoxia induced 15-LO expression in PAFs both in vivo and in vitro. In addition, hypoxia stimulated JNK phosphorylation in PAFs. Blocking 15-LO or JNK suppressed 15-LO-induced PAF proliferation and cell cycle alterations. The inhibition of p27kipl by gene silencing attenuated 15-LO-induced PAF proliferation and cell cycle alterations. Furthermore, JNK inhibition or Elk-1 knockdown suppressed hypoxia-induced 15-LO expression in PAFs. Luciferase reporter and ChIP assays revealed that the 15-LO promoter contains Elk-1-binding sites and also that Elk-1 increased the hypoxia-induced activity of the 15-LO promoter. CONCLUSION These results suggest that hypoxia promotes changes in the cellular dynamics of PAFs by inducing 15-LO expression, which leads to vascular adventitial remodelling. The modulation of p27kipl expression by 15-LO enhances PAF proliferation and cell cycle alterations. Furthermore, the JNK-dependent increase in Elk-1 signalling is required for hypoxia-induced 15-LO expression in PAFs.
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Zhu J, Xing Y. [Effect of intrauterine growth retardation on the structure and function of the kidney]. ZHONGHUA ER KE ZA ZHI = CHINESE JOURNAL OF PEDIATRICS 2016; 54:872-874. [PMID: 27806803 DOI: 10.3760/cma.j.issn.0578-1310.2016.11.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
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80
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Wang C, Cao J, Xing Y, Pu D, Liu J, Wu J. TBP2 gene may not be associated with primary ovarian insufficiency. Climacteric 2016; 19:565-567. [PMID: 27642674 DOI: 10.1080/13697137.2016.1231175] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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81
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Ma L, Hu X, Li N, Xing Y. P7004 Screen of transgenic integration sites and construction of site-specific transgenic pig by CRISPR-Cas9. J Anim Sci 2016. [DOI: 10.2527/jas2016.94supplement4177a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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82
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Tan T, Xing Y, Hu X, Li N. P7006 Generation of a porcine model of obesity and complications by leptin knockout. J Anim Sci 2016. [DOI: 10.2527/jas2016.94supplement4178a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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83
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Hu Y, Xing Y, Hu X, Li N. P6020 Deficiency of Trim63 leads to hypertrophic cardiomyopathy in pig. J Anim Sci 2016. [DOI: 10.2527/jas2016.94supplement4158x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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84
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Chen J, Li N, Zhao Y, Hu X, Xing Y. P7008 Characterization of CD163 modification pig for PRRSV resistance. J Anim Sci 2016. [DOI: 10.2527/jas2016.94supplement4179a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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85
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Xing Y, Gill CA. P4048 Comparison of three methods to discover copy number variants in Nellore and Angus cattle. J Anim Sci 2016. [DOI: 10.2527/jas2016.94supplement4102x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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86
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Fu L, Matsuyama I, Chiba T, Xing Y, Korenaga T, Guo Z, Fu X, Nakayama J, Mori M, Higuchi K. Extrahepatic Expression of Apolipoprotein A-II in Mouse Tissues: Possible Contribution to Mouse Senile Amyloidosis. J Histochem Cytochem 2016; 49:739-48. [PMID: 11373320 DOI: 10.1177/002215540104900607] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Apolipoprotein A-II (apoA-II), an apolipoprotein in serum high-density lipoprotein, is a precursor of mouse senile amyloid fibrils. The liver has been considered to be the primary site of synthesis. However, we performed nonradioactive in situ hybridization analysis in tissue sections from young and old amyloidogenic (R1.P1- Apoa2 c ) and amyloid-resistant (SAMR1) mice and revealed that other tissues in addition to the liver synthesize apoA-II. We found a strong hybridization signal in the basal cells of the squamous epithelium and the chief cells of the fundic gland in the stomach, the crypt cells and a small portion of the absorptive epithelial cells in the small intestine, the basal cells of the tongue mucosa, and the basal cells of the epidermis and hair follicles in the skin in both mouse strains. Expression of apoA-II mRNA in those tissues was also examined by RT-PCR analysis. Immunolocalization of apoA-II protein also indicated the cellular localization of apoA-II. ApoA-II transcription was not observed in the heart. Amyloid deposition was observed around the cells expressing apoA-II mRNA in the old R1.P1- Apoa2 c mice. These results demonstrate that the apoA-II mRNA is transcribed and translated in various extrahepatic tissues and suggest a possible contribution of apoA-II synthesized in these tissues to amyloid deposition.
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Chen J, Zhao MF, Cao XL, Meng JX, Xing Y, He XY, Jin X, Xu P, Jiang YY. [Effects of iron overload on the peripheral blood T cells in mice]. ZHONGHUA XUE YE XUE ZA ZHI = ZHONGHUA XUEYEXUE ZAZHI 2016; 37:535-7. [PMID: 27431085 PMCID: PMC7348332 DOI: 10.3760/cma.j.issn.0253-2727.2016.06.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/24/2016] [Indexed: 11/05/2022]
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88
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Xing Y, Macq B, Janssens G, Bondar L. SU-F-J-208: Prompt Gamma Imaging-Based Prediction of Bragg Peak Position for Realistic Treatment Error Scenarios. Med Phys 2016. [DOI: 10.1118/1.4956116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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89
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Zhao J, Hu W, Xing Y, Wu X, Li Y. SU-D-BRC-03: Development and Validation of an Online 2D Dose Verification System for Daily Patient Plan Delivery Accuracy Check. Med Phys 2016. [DOI: 10.1118/1.4955622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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90
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Zhao J, Hu W, Xing Y, Wu X, Li Y. SU-F-T-190: Homogeneity Study of Proton and Heavy Ion Scanning Beams Based On Different Compositions of Spot Sizes (FWHM) and Grid Sizes. Med Phys 2016. [DOI: 10.1118/1.4956327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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91
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Cao XL, Zhao MF, Li DG, Xing Y, Zhang YC, Chen J, He XY, Cui R, Meng JX, Xiao X, Mu J, Jiang YY, Wu RM. [Establishment of macrophage model of iron overload in vitro and the injury induced by oxidative stress on macrophage with iron overload]. ZHONGHUA YI XUE ZA ZHI 2016; 96:129-33. [PMID: 26792697 DOI: 10.3760/cma.j.issn.0376-2491.2016.02.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To establish macrophage iron overload model in vitro by co-culture macrophages with iron, and to explore the effect of iron overload on cell reactive oxygen species (ROS) and the impact of ROS on macrophages. METHOD Iron overload group were treated with different concentrations (0, 5, 10, 20, 40, 80 μmol/L respectively) of ferric ammonium citrate (FAC). The control group was the group of macrophages without FAC treatment. We detected the number and state of cells, metabolic activity, the change of phagocytosis, the levels of ROS and reactive nitrogen, and changes of related oxidative stress signaling pathways in different groups. Changes in the above indexes were detected after application of deferasirox (DFX) to remove iron and the antioxidant N -acetylcysteine (NAC) to clear excess oxidative stress. RESULTS (1)The levels of labile iron pool (LIP) in macrophages co-cultivated with iron was increased with the increase of iron concentration in a dose-dependent manner. The LIP levels was the highest in the macrophages treated with 80 μmol/L. (2)The increase of FAC concentration, the metabolic activity of macrophages in the 5 FAC-treated groups decreased to 51.58%, 40.98%, 16.23%, 3.46%, and 0.05% of the activity level of the control group (all P< 0.05). The group with the metabolic activity decreased to 16.23% (20 μmol/L) was selected as the iron overload group for the following experiments. (3)Compared with the control group, the number of macrophages in the iron overload group reduced to 32.80% (P<0.05), and the state of cells changed from adherence to partial suspension. The phagocytosis of macrophages in the iron overload group reduced to 20.40% of the control group (P<0.05). (4)Our further experiment showed that the levels of ROS and the activity nitrogen in the iron overload group increased by 7.71-and 1.45-fold compared with the control group (both P<0.05). The RT-PCR showed up-regulated mRNA expression of genes related with ROS production, i. e. nicotinamide adenine dinucleotide phosphate oxidase 4 (NOX 4) gene related with ROS production and inducible nitric oxide synthase (iNOS) gene related with reactive nitrogen production, down-regulated mRNA expression of glutathione peroxidase 1 (GPX1) gene which participated in ROS clearance. Moreover, mRNA expression of phosphatidylinositol-3-kinase (PI3K) gene involved in oxidative stress signaling pathway in the iron overload group was up-regulated, while fork head protein O3 (FOXO3) which regulated oxidative stress through negative feedback showed a down-regulation level of mRNA expression compared with the control group. (5)After iron chelation and antioxidant treatment, the above-mentioned damage in the iron overload group were partially reversed. CONCLUSIONS The damages of iron overload on macrophages may be mediated by inducing oxidative stress and activating oxidative stress signaling pathways. Our established model provides a method to explore the mechanism of iron overload on macrophage, and may shed some new light on possible therapeutic target in treating iron overload patients.
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Pu D, Xing Y, Gao Y, Gu L, Wu J. Erratum to “Gene variation and premature ovarian failure: a meta-analysis” [Eur. J. Obstet. Gynecol. Reprod. Biol. 182 (2014) 226–237]. Eur J Obstet Gynecol Reprod Biol 2016; 198:179. [DOI: 10.1016/j.ejogrb.2015.11.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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93
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Xing Y, Zhang HM, Fu HL, Liu H, Sun Y, Peng JP, Wang F, Lin X, Ma XC, Xue QK, Wang J, Xie XC. Quantum Griffiths singularity of superconductor-metal transition in Ga thin films. Science 2015; 350:542-5. [DOI: 10.1126/science.aaa7154] [Citation(s) in RCA: 119] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2015] [Accepted: 09/21/2015] [Indexed: 11/02/2022]
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94
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Wang XL, Li CJ, Xing Y, Yang YH, Jia JP. Hypervalinemia and hyperleucine-isoleucinemia caused by mutations in the branched-chain-amino-acid aminotransferase gene. J Inherit Metab Dis 2015; 38:855-61. [PMID: 25653144 DOI: 10.1007/s10545-015-9814-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Revised: 01/09/2015] [Accepted: 01/12/2015] [Indexed: 10/24/2022]
Abstract
Valine, leucine, and isoleucine are essential branched chain amino acids (BCAAs). When BCAA metabolism is genetically impaired in human, serum levels of BCAA and/or their metabolites rise considerably, causing severe neurological dysfunction. The first step in BCAA catabolism is catalyzed by branched chain aminotransferase (BCAT). Hypervalinemia and hyperleucine-isoleucinemia caused by BCAT gene mutation in human have not been reported previously. A 25-year-old man presented with headache complaints and mild memory impairment for about six years. Brain MRI showed symmetric white matter abnormal signals. Metabolic studies revealed remarkably elevated plasma valine and leucine concentrations. Maple syrup urine disease (MSUD) diagnosis was not supported since all genes for the branched-chain α-keto acid dehydrogenase complex (BCKD) gene were normal. Interestingly, two heterogeneous BCAT2 gene mutations were found in the patient, including c.509G > A (p.Arg170Gln) and c.790G > A (p.Glu264Lys). In addition, c.509G > A (p.Arg170Gln) and c.790G > A (p.Glu264Lys) were found in his father and mother, respectively, suggesting an autosomal recessive disorder. BCAT2 functional studies demonstrated that the two BCAT2 gene mutations resulted in decreased BCAT2 enzyme activity. After treatment with vitamin B6, the levels of BCAA, especially valine were remarkably decreased and brain MRI lesions were improved. These findings suggest a new type of branched chain amino acid metabolism disorder. This rare case provides great insight into the further understanding of BCAA metabolism and its defect in human. BCAT2 gene mutations can cause hypervalinemia and hyperleucine-isoleucinemia, which are associated with brain white matter lesions.
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Xing Y, Wang S, Fan J, Oso AO, Kim SW, Xiao D, Yang T, Liu G, Jiang G, Li Z, Li L, Zhang B. Effects of dietary supplementation with lysine-yielding Bacillus subtilis on gut morphology, cecal microflora, and intestinal immune response of Linwu ducks1. J Anim Sci 2015; 93:3449-57. [DOI: 10.2527/jas.2014-8090] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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96
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Zheng ZF, Shi HL, Xing Y, Li D, Jia JY, Lin S. Thoracic cord compression due to ligamentum flavum gouty tophus: a case report and literature review. Spinal Cord 2015; 53:881-6. [PMID: 26078231 PMCID: PMC5399141 DOI: 10.1038/sc.2015.93] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Accepted: 04/07/2015] [Indexed: 12/13/2022]
Abstract
Study design: Here we describe a patient who developed myelopathy due to gouty tophi of the ligamentum flavum in the thoracic spine. We also review similar cases previously reported in the literature. Objective: Our aim was to present a case of myelopathy due to thoracic spinal gouty tophus. Methods: We report the case of a 56-year-old male with history of peripheral gout and renal insufficiency. The patient complained of back pain and paraparesis of the left lower limb. Multiple tophi were noted over several interphalangeal and metatarsophalangeal joints. Neurological examination showed decreased left lower limb strength and a positive Babinski sign. Magnetic resonance imaging of the thoracic spine revealed hypertrophy of the ligamentum flavum at the level of T3/T4, T5/T6, T9/T10, T10/T11 and T11/T12. Results: A thoracic laminectomy at T1-T5 was performed. Chalky white granular material was found in the ligamentum flavum during surgery. Histological analysis of the specimen demonstrated a gouty tophus. The patient's back pain and paraparesis of the lower left limb improved. Conclusion: The clinician should include spinal gout in the differential diagnosis when dealing with patients with gout and axial pain with or without neurologic deficits. If this diagnosis is seriously entertained, then a CT scan or magnetic resonance imaging as well as tissue biopsy may be needed to establish the diagnosis.
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Xing Y, Li N, Zhou W, Huang X, Jiang ZH, Liu L, Bao HL. [Analysis of the control level and the affecting factors in 4-11 years old children with asthma]. BEIJING DA XUE XUE BAO. YI XUE BAN = JOURNAL OF PEKING UNIVERSITY. HEALTH SCIENCES 2014; 46:936-940. [PMID: 25512287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE To assess the control level of 4-11 years old children with asthma and to explore the correlative factors affecting the control level of asthma. METHODS One cross-sectional study was conducted of the 4-11 years old children with asthma from Pediatrics Outpatient Department of Peking University Third Hospital from October 2013 to February 2014. According to asthma control test (ACT), the control levels of asthma children could be divided into three levels: fully controlled, partly controlled and non-controlled. The partly controlled group and the non-controlled group were merged into the non-full controlled group. Life quality was compared between the full controlled group and the non-full controlled group. The correlative factors affecting the controlled level of asthma were analyzed by Logistic regression. The correlative case information was collected and the data were entered with EpiData software and analyzed with SPSS 17.0 software. RESULTS Ninety asthma children were enrolled.The children from the full controlled group and the non-full controlled group accounted for 61.1% (55/90) and 38.9% (35/90), respectively. Life quality of the full controlled group was higher than that of the non-fully controlled group. There was no significant difference between the two groups on body mass index (BMI), education level of parents, parents or relative smoking, times of respiratory tract infection within 3 months, using asthma control drugs within 4 weeks before seeing a doctor and regularly taking medicine according to the doctor's advice (P>0.05). The binary Logistic regression analysis obtained three correlative factors affecting the control level of asthma: non-regular follow-up (OR=8.364, 95%CI: 1.816-38.532, P<0.05), being diagnosed with or suffering from allergic rhinitis (OR=6.728, 95% CI: 1.699-26.644, P<0.05) and accompanying with other allergic diseases (OR=3.926, 95%CI: 1.210-12.744, P<0.05). CONCLUSION The results from the single center have shown that the asthma full-controlled rate of 4-11 years old children with asthma is not high. The higher control level, the better the life quality. Non-regular follow-up and being diagnosed with or suffering from allergic rhinitis are the correlative factors affecting the control level of 4-11 years old children with asthma. Meanwhile, accompanying with other allergic diseases, such as atopic dermatitis and food allergy is the protective factor for asthma control. The data from the multi-center and further study will be needed to demonstrate the results of this study.
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Li Y, Feng ST, Yao Y, Yang L, Xing Y, Wang Y, You JH. Correlation between IRGM genetic polymorphisms and Crohn's disease risk: a meta-analysis of case-control studies. GENETICS AND MOLECULAR RESEARCH 2014; 13:10741-53. [PMID: 25526194 DOI: 10.4238/2014.december.18.15] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
This meta-analysis was performed to evaluate the relationships between single-nucleotide polymorphisms (SNPs) in the immunity-related GTPase M (IRGM) gene and the risk of Crohn's disease (CD). Eleven case-control studies were included, for a total of 5183 CD patients and 5571 healthy controls. Three common SNPs (rs13361189 C>T, rs10065172 C>T, and rs4958847 A>G) in the IRGM gene were assessed. We found that the IRGM rs13361189 polymorphism was significantly associated with an increased risk of CD [C allele vs T allele: odds ratio (OR) = 1.30, 95% confidence interval (CI) = 1.05-1.61, P = 0.017; CC + CT vs TT: OR = 1.32, 95%CI = 1.06-1.64, P = 0.013]. However, we observed no correlation between the rs10065172 and rs4958847 polymorphisms in the IRGM gene with susceptibility to CD (all P > 0.05). Subgroup analysis by ethnicity revealed significant associations between IRGM genetic polymorphisms and an increased risk of CD among Caucasian populations (C allele vs T allele: OR = 1.22, 95%CI = 1.07-1.40, P = 0.004; CC + CT vs TT: OR = 1.22, 95%CI = 1.05-1.41, P = 0.009), but not among Asian populations (all P > 0.05). Meta-regression analysis also confirmed that ethnic differences may be an important source of heterogeneity (P = 0.003). Our meta-analysis results indicate that the IRGM rs13361189 polymorphism contributes to the susceptibility to CD. Thus, the IRGM rs13361189 polymorphism is promising as a biomarker for early diagnosis of CD. However, the IRGM rs10065172 and rs4958847 polymorphisms may not be the major determinants of CD risk.
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Pu D, Xing Y, Gao Y, Gu L, Wu J. Gene variation and premature ovarian failure: a meta-analysis. Eur J Obstet Gynecol Reprod Biol 2014; 182:226-37. [DOI: 10.1016/j.ejogrb.2014.09.036] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Revised: 07/12/2014] [Accepted: 09/23/2014] [Indexed: 12/16/2022]
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Xu P, Xu H, Tang X, Xu L, Wang Y, Guo L, Yang Z, Xing Y, Wu Y, Warner M, Gustafsson JA, Fan X. Liver X receptor β is essential for the differentiation of radial glial cells to oligodendrocytes in the dorsal cortex. Mol Psychiatry 2014; 19:947-57. [PMID: 24934178 DOI: 10.1038/mp.2014.60] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Revised: 04/23/2014] [Accepted: 04/24/2014] [Indexed: 01/22/2023]
Abstract
Several psychiatric disorders are associated with aberrant white matter development, suggesting oligodendrocyte and myelin dysfunction in these diseases. There are indications that radial glial cells (RGCs) are involved in initiating myelination, and may contribute to the production of oligodendrocyte progenitor cells (OPCs) in the dorsal cortex. Liver X receptors (LXRs) are involved in maintaining normal myelin in the central nervous system (CNS), however, their function in oligodendrogenesis and myelination is not well understood. Here, we demonstrate that loss of LXRβ function leads to abnormality in locomotor activity and exploratory behavior, signs of anxiety and hypomyelination in the corpus callosum and optic nerve, providing in vivo evidence that LXRβ deletion delays both oligodendrocyte differentiation and maturation. Remarkably, along the germinal ventricular zone-subventricular zone and corpus callosum there is reduced OPC production from RGCs in LXRβ(-/-) mice. Conversely, in cultured RGC an LXR agonist led to increased differentiation into OPCs. Collectively, these results suggest that LXRβ, by driving RGCs to become OPCs in the dorsal cortex, is critical for white matter development and CNS myelination, and point to the involvement of LXRβ in psychiatric disorders.
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