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Yuan C, Li J, Ding Y, He Q, Yan H, Lu J, Zou X. Estimation of L-arginine requirement for Xinyang Black laying hens from 33 to 45 weeks of age. J APPL POULTRY RES 2015. [DOI: 10.3382/japr/pfv049] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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Arrossi AV, Merzianu M, Farver C, Yuan C, Wang SH, Nakashima MO, Cotta CV. Nodular pulmonary light chain deposition disease: an entity associated with Sjögren syndrome or marginal zone lymphoma. J Clin Pathol 2015; 69:490-6. [DOI: 10.1136/jclinpath-2015-203342] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 10/03/2015] [Indexed: 11/04/2022]
Abstract
BackgroundLight chain deposition disease (LCDD) is usually a systemic disorder characterised by non-amyloid monoclonal immunoglobulin light chain deposition in tissues. Localised nodular pulmonary (NP) LCDD is a rare and poorly characterised entity and, owing to the difficulties in diagnosis, limited data are available.MethodsWe investigated the clinical, radiological and pathological characteristics of a series of six confidently diagnosed cases of NPLCDD.ResultsThere were three men and three women with ages ranging from 33 to 74 years. In all cases there were single or multiple pulmonary nodules, in one case associated with cysts. Two patients had no previous history of a lymphoproliferative or autoimmune disorder, two had Sjögren syndrome (SS) and two had extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue (MALT lymphoma). Lung biopsies led to diagnoses of MALT lymphoma in four patients, including both of those with a previous history of lymphoma and one with SS. In five cases the diagnosis was confirmed by liquid chromatography–tandem mass spectrometry (LC–MS/MS) and in one by electron microscopy. There was no evidence of systemic LCDD in any of the cases. Five patients had an indolent course in spite of limited therapeutic intervention while, in the patient who died, the cause of death was related to the spread of the lymphoma and was not due to the pulmonary lesions.ConclusionsNPLCDD is an indolent disease, in most cases associated with MALT lymphoma or autoimmune disease.
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Liu JB, Zeng YF, Yuan C, Yue YJ, Ding XZ, Guo TT, Han JL, Feng RL, Sun XP, Niu CE, Yang BH, Guo J. The complete mitochondrial genome sequence of the dwarf blue sheep, Pseudois schaeferi haltenorth in China. Mitochondrial DNA A DNA Mapp Seq Anal 2015; 27:4411-4413. [PMID: 26488305 DOI: 10.3109/19401736.2015.1089548] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The dwarf blue sheep (Pseudois schaeferi haltenorth) belongs the subfamily Caprinae, which is distributed in Sichuan, Tibet, Yunnan, and Qinghai in China. In this study, the complete mitochondrial genome of Pseudois schaeferi haltenorth was sequenced. The mitogenome was 16 741 bp in length, consisting of 13 protein-coding genes, 22 transfer RNA (tRNA) genes, 2 ribosomal RNA (rRNA) genes, and a non-coding control region (D-loop region). As in other mammals, most mitochondrial genes are encoded on the heavy strand, except for ND6 and eight tRNA genes which are encoded on the light strand. The overall base composition of the Pseudois schaeferi haltenorth is 33.54% A, 26.37% T, 26.91% C, and 13.18% G, A + T (59.91%) was higher than G + C (40.09%). The phylogenetic relationships was analyzed using the complete mitogenome sequence, results show that P. schaeferi haltenorth should be a different species differ from the Genus pseudois hodgson. These information provide useful data for further study on the protection of genetic resources and the taxonomy of Caprinae.
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Yuan C, Li Z, Cheng J. Overexpression of metabolic markers PKM2 and LDH5 correlates with aggressive clinicopathological features and adverse patients’ prognosis in tongue cancer. Int J Oral Maxillofac Surg 2015. [DOI: 10.1016/j.ijom.2015.08.499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Huang Q, Lai W, Yuan C, Shen S, Cui D, Zhao J, Lin J, Ren H, Yang M. Predictors of intestinal pseudo-obstruction in systemic lupus erythematosus complicated by digestive manifestations: data from a Southern China lupus cohort. Lupus 2015; 25:248-54. [PMID: 26405024 DOI: 10.1177/0961203315605366] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Accepted: 08/12/2015] [Indexed: 01/07/2023]
Abstract
Objective To determine factors that may predict intestinal pseudo-obstruction (IpsO) in systemic lupus erythematosus (SLE) patients complicated by digestive manifestations. Methods SLE patients with digestive manifestations ( n = 135) were followed at Southern Medical University affiliated Nanfang Hospital from 2000 until 2013. Demographic variables, clinical features, and laboratory data were compared between the two groups. Univariate and multivariate logistic regression models were used to establish factors that predispose to IpsO in these patients. Results At the end of the study period, 32 (23.7%) patients had developed IpsO. Mortality (9 patients) was infrequent and the cause of death was unrelated to IpsO. Independent predictors of IpsO in SLE were ureterectasia, anti-U1 RNP+, peritonitis, and low C3 levels. Conclusions Regular abdominal X-ray examinations are recommended in SLE patients with ureterectasia, anti-U1 RNP+, peritonitis, or low C3 levels, as early diagnosis and therapy may prevent unnecessary surgical intervention and improve the disease course.
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Li Q, Wang J, Chen H, Gong X, Ma N, Gao K, He L, Guan M, Chen Z, Li R, Mi D, Yuan C, Zhao X, Zhao XH. Characterization of Craniocervical Artery Dissection by Simultaneous MR Noncontrast Angiography and Intraplaque Hemorrhage Imaging at 3T. AJNR Am J Neuroradiol 2015; 36:1769-75. [PMID: 26045573 DOI: 10.3174/ajnr.a4348] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 02/13/2015] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Craniocervical artery dissection is the most common cause of ischemic stroke identified in young adults. For the diagnosis of craniocervical artery dissection, multisequence MR imaging is recommended but is time-consuming. Recently, investigators proposed a simultaneous noncontrast angiography and intraplaque hemorrhage imaging technique allowing simultaneous noncontrast MRA and vessel wall imaging in a single scan. This study sought to investigate the feasibility of 3D simultaneous noncontrast angiography and intraplaque hemorrhage MR imaging in the characterization of craniocervical artery dissection. MATERIALS AND METHODS Twenty-four symptomatic patients (mean age, 45.0 ± 16.1 years; 21 men) with suspected craniocervical artery dissection were recruited. The 3D simultaneous noncontrast angiography and intraplaque hemorrhage 3D TOF MRA and black-blood imaging sequences were performed on a 3T MR imaging scanner. The agreement between simultaneous noncontrast angiography and intraplaque hemorrhage imaging and multisequence MR imaging in evaluating arterial dissection was determined. RESULTS Dissection was found to involve 1 artery in 22 patients and 2 arteries in 2 patients. The intramural hematoma and luminal occlusion were detected in 19 (79.2%) and 11 (45.8%) patients, respectively. In measuring stenosis, the Cohen κ value between 3D TOF MRA and simultaneous noncontrast angiography and intraplaque hemorrhage imaging was 0.82 (P < .001). All intramural hematomas on multisequence imaging were successfully identified by simultaneous noncontrast angiography and intraplaque hemorrhage imaging. CONCLUSIONS 3D simultaneous noncontrast angiography and intraplaque hemorrhage imaging showed excellent agreement with multisequence MR imaging in evaluating luminal stenosis and intramural hematoma in patients with craniocervical artery dissection. The simultaneous noncontrast angiography and intraplaque hemorrhage imaging saved nearly 50% of scanning time compared with multisequence MR imaging. Our findings suggest that 3D simultaneous noncontrast angiography and intraplaque hemorrhage imaging might be an alternative, time-efficient diagnostic tool for craniocervical artery dissection.
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Yuan C, Cao Y, Chavarro J, Lindstrom S, Qiu W, Willett W, Hsing A, Kibel A, Rosner B, Stampfer M, Kra P, Ma J. Prediagnostic Body-mass Index, Smoking and Prostate Cancer Survival: A Cohort Consortium Study of Over 10,000 White Men with Prostate Cancer. Cancer Epidemiol Biomarkers Prev 2015. [DOI: 10.1158/1055-9965.epi-15-0102] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Abstract
Few prospective studies have investigated the relationship between pre-diagnostic obesity, smoking and prostate cancer (PCa) survival by timing of measurement, by age at diagnosis, and evaluated the interaction between obesity and smoking. METHODS: We conducted a multinational survival analysis among 10,106 PCa cases (1,007 PCa deaths and 2,893 total deaths) from eight cohorts with an average of 8.2 years of follow up. Hazard ratio (HR) of PCa death was estimated using Cox proportional hazard model, adjusting for age, alcohol intake, diabetes status, cohort and duration between baseline and diagnosis and subsequently adjusted for tumor stage and grade. RESULTS: Higher prediagnostic BMI was related to higher risk of PCa death. With each 5 kg/m2 increase in BMI, the multivariate HR for PCa death was 1.08 (95% CI, 1.02–1.14) among overall participants (p-trend = 0.01) and 1.33 (95% CI, 1.18–1.51) among never or former smokers (p-trend < 0.001). This positive trend for PCa mortality was mainly observed among men with BMI measured more than 5 years before diagnosis, and among those age >65 years old at diagnosis. Compared with never smokers, current smokers had significantly elevated risk of PCa death, with a HR of 1.92 (95% CI, 1.52–2.43) regardless of the time of measurement, age at diagnosis and BMI. After further adjusting for tumor stage and grade, the association between BMI, smoking and PCa death was attenuated but remained statistical significant. CONCLUSIONS: In this consortium study of eight large cohorts, smoking and overweight/obesity before diagnosis were significant predictors for subsequent PCa-specific mortality. Smoking significantly modifies the association of BMI and PCa-specific mortality.
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Yuan C, Chen J, Yu S, Chang Y, Mao J, Xu Y, Luo W, Zeng B, Dai L. Protein-responsive assemblies from catechol-metal ion supramolecular coordination. SOFT MATTER 2015; 11:2243-2250. [PMID: 25648855 DOI: 10.1039/c4sm02528h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Supramolecular self-assembly driven by catechol-metal ion coordination has gained great success in the fabrication of functional materials including adhesives, capsules, coatings and hydrogels. However, this route has encountered a great challenge in the construction of nanoarchitectures in the absence of removable templates, because of the uncontrollable crosslinking of catechol-metal ion coordination. Herein, we show that a supramolecular approach, combining both catechol-metal ion coordination and polymer self-assembly together, can organize polymers into hybrid nanoassemblies ranging from solid particles, homogeneous vesicles to Janus vesicles. Without the introduction of a specific binding ligand or complicated molecular design, these assemblies can totally disassemble in response to proteins. UV/vis absorption, fluorescence quenching and recovery investigations have confirmed that proteins can seize metal ions from the hybrid nanoassemblies, thus causing the degradation of catechol-metal ion coordination networks.
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Yuan C, Ding Y, He Q, Azzam MMM, Lu JJ, Zou XT. L-arginine upregulates the gene expression of target of rapamycin signaling pathway and stimulates protein synthesis in chicken intestinal epithelial cells. Poult Sci 2015; 94:1043-51. [PMID: 25771531 DOI: 10.3382/ps/pev051] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/22/2014] [Indexed: 12/21/2022] Open
Abstract
L-arginine (Arg) is an indispensable amino acid in avians and is required for growth. The aim of this study was to investigate the effects of L-Arg on protein synthesis and genes expression involved in target of rapamycin (TOR) signaling pathway in chicken enterocytes. Cells were cultured for 4 days in L-Arg-free Dulbecco's modified Eagle's medium containing 10, 100, 200, 400, or 600 μM L-Arg. Cell growth, cell cycle, protein synthesis, and protein degradation as well as mRNA expression levels of TOR, ribosomal protein S6 kinase 1 (S6K1), and eukaryotic initiation factor 4E-binding protein 1 (4E-BP1) were determined. The results showed that cell viability was enhanced by L-Arg with a maximal response at 10 to 400 μM. Increasing extracellular concentrations of L-Arg from 10 to 400 μM increased the cells in S and G2/M phase to a significant extent and decreased cell numbers in G0/G1 phase. Further more, addition of 100, 200, or 400 μM L-Arg to culture medium increased protein synthesis and reduced protein degradation in chicken intestinal epithelial cells. Consistent with the data on cell growth and protein turnover, supplementation of 100, 200, or 400 μM L-Arg increased the mRNA abundances of TOR, 4E-BP1, and S6K1. It was concluded the action of L-Arg involves in upregulating the genes expression of TOR cell signaling pathway which increases protein synthesis and reduces protein degradation.
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Qian CY, Yuan C, Tan YM, Liu XP, Dong YQ, Yang LJ, Wu PL, Wang XM. Comparing performance of Chromameter®, Mexameter®and full-field laser perfusion imaging for measurement of ultraviolet B light-induced erythema. Clin Exp Dermatol 2015; 40:438-40. [PMID: 25683325 DOI: 10.1111/ced.12589] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/25/2014] [Indexed: 11/25/2022]
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Azzam M, Yuan C, Liu G, Zou X. Effect of excess dietary threonine on laying performance, egg quality, serum free amino acids, and digestive enzymes activities of laying hens during the postpeak period. J APPL POULTRY RES 2014. [DOI: 10.3382/japr.2013-00913] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Humbert P, Yuan C, Wang X, Guichard A, Lihoreau T, Lafforgue C. Demodex folliculorum dans la rosacée papulo-pustuleuse : comparaison de deux méthodes de caractérisation. Ann Dermatol Venereol 2014. [DOI: 10.1016/j.annder.2014.09.518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Yuan C, Wang XM, Guichard A, Lihoreau T, Mac-Mary S, Khyat L, Ardigò M, Humbert P. Comparison of reflectance confocal microscopy and standardized skin surface biopsy for three different lesions in a pityriasis folliculorum patient. Br J Dermatol 2014; 172:1440-2. [PMID: 25363861 DOI: 10.1111/bjd.13506] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Cheng X, Yuan C, Blackburn S, Withey P. The study of the influence of binder systems in an Y2O3–ZrO2 facecoat material on the investment casting slurries and shells properties. Ann Ital Chir 2014. [DOI: 10.1016/j.jeurceramsoc.2014.03.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Yan X, Yuan C, Zhao N, Cui Y, Liu J. Prenatal androgen excess enhances stimulation of the GnRH pulse by neurokinin b and kisspeptin in pubertal female rats. Fertil Steril 2014. [DOI: 10.1016/j.fertnstert.2014.07.906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Deng J, She RF, Huang WL, Yuan C, Mo G. Fibroin protein/chitosan scaffolds and bone marrow mesenchymal stem cells culture in vitro. GENETICS AND MOLECULAR RESEARCH 2014; 13:5745-53. [PMID: 25117332 DOI: 10.4238/2014.july.29.1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
A previous experiment demonstrated that fibroin protein and chitosan mixed in proper proportion presented good physical and chemical properties and biological characteristics, which can make up for their respective disadvantages. To observe the growth of bone marrow mesenchymal stem cells (BMSCs) on these fibroin protein/chitosan 3D scaffolds, induced rabbit BMSCs were seeded on fibroin protein/chitosan scaffolds. The cell adhesion rate was measured, and cell growth was observed under an inverted microscope and a scanning electron microscope. The cell adhesion rate increased with time. The inverted microscope observations showed that the cells on fibroin protein/chitosan scaffolds could not be seen clearly. As time passed, the number of cells around the stent increased and some cells stretched inside the scaffolds. Electron microscopy showed active cell growth and normal proliferation, and the granular and filamentous matrix substances could be seen around cells. The microfilaments of cell and scaffold materials were tightly connected. The cells not only grew on the surface of the adherent material, but also stretched inside of the materials. These results indicated that the fibroin protein/ chitosan mixed scaffolds have good biocompatibility.
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Xie P, Yuan C, Wang C, Zou XT, Po Z, Tong HB, Zou JM. Molecular cloning and tissue distribution of peroxisome proliferator-activated receptor-alpha (PPARα) and gamma (PPARγ) in the pigeon (Columba livia domestica). Br Poult Sci 2014; 55:136-42. [DOI: 10.1080/00071668.2014.889281] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Yu J, Zhao C, Chong F, Cao Y, Subhan F, Cui B, Tang S, Yuan C, Zeng J, Yan Z. A Simple, Rapid and Eco-Friendly Approach for the Analysis of Aromatic Amines in Environmental Water Using Single-Drop Microextraction-Gas Chromatography. J Chromatogr Sci 2014; 53:360-5. [DOI: 10.1093/chromsci/bmu036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Helck A, Bianda N, Ganton G, Yuan C, Reiser M, Gallino A, Wyttenbach R, Saam T. Intra-individueller Vergleich der Plaquemorphologie in den Karotiden und Femoralarterien mithilfe der nicht-invasiven MRT-Plaquebildgebung. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1372903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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He X, Yuan C, Chen Y. Isolation, characterization, and expression analysis of FGF5 isoforms in cashmere goat. Small Rumin Res 2014. [DOI: 10.1016/j.smallrumres.2013.10.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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He X, Arslan AD, Ho TT, Yuan C, Stampfer MR, Beck WT. Involvement of polypyrimidine tract-binding protein (PTBP1) in maintaining breast cancer cell growth and malignant properties. Oncogenesis 2014; 3:e84. [PMID: 24418892 PMCID: PMC3940912 DOI: 10.1038/oncsis.2013.47] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Revised: 11/13/2013] [Accepted: 11/14/2013] [Indexed: 12/12/2022] Open
Abstract
We have investigated some roles of splicing factor polypyrimidine tract-binding protein (PTBP1) in human breast cancer. We found that PTBP1 was upregulated in progressively transformed human mammary epithelial cells (HMECs), as well as in breast tumor cell lines compared with HMECs with finite growth potential and found that the level of PTBP1 correlated with the transformation state of HMECs. Knockdown of PTBP1 expression substantially inhibited tumor cell growth, colony formation in soft agar and in vitro invasiveness of breast cancer cell lines, a result similar to what we have reported in ovarian cancer. However, ectopic expression of PTBP1 (as a PTBP1-EGFP fusion protein) did not enhance the proliferation of immortalized HMEC. Rather, PTBP1 expression promoted anchorage-independent growth of an immortalized HMEC as assessed by increased colony formation in soft agar. In addition, we found that knockdown of PTBP1 expression led to upregulation of the expression of the M1 isoform of pyruvate kinase (PKM1) and increase of the ratio of PKM1 vs PKM2. PKM1 has been reported to promote oxidative phosphorylation and reduce tumorigenesis. Correspondingly, we observed increased oxygen consumption in PTBP1-knockdown breast cancer cells. Together, these results suggest that PTBP1 is associated with breast tumorigenesis and appears to be required for tumor cell growth and maintenance of transformed properties. PTBP1 exerts these effects, in part, by regulating the splicing of pyruvate kinase, and consequently alters glucose metabolism and contributes to the Warburg effect.
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Yuan C, Song H, Jiang Y, Azzam M, Zhu S, Zou X. Effects of lead contamination in feed on laying performance, lead retention of organs and eggs, protein metabolism, and hormone levels of laying hens. J APPL POULTRY RES 2013. [DOI: 10.3382/japr.2013-00801] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Zhang G, Li Y, Sun Y, Yuan C, Xu Z. The effect of tetraploid Robinia pseudoacacia leaf meal on performance, egg quality, and nutrient digestibility in laying hens. JOURNAL OF ANIMAL AND FEED SCIENCES 2013. [DOI: 10.22358/jafs/65925/2013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Yuan C, Malone B. Learning Optimal Bayesian Networks: A Shortest Path Perspective. J ARTIF INTELL RES 2013. [DOI: 10.1613/jair.4039] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
In this paper, learning a Bayesian network structure that optimizes a scoring function for a given dataset is viewed as a shortest path problem in an implicit state-space search graph. This perspective highlights the importance of two research issues: the development of search strategies for solving the shortest path problem, and the design of heuristic functions for guiding the search. This paper introduces several techniques for addressing the issues. One is an A* search algorithm that learns an optimal Bayesian network structure by only searching the most promising part of the solution space. The others are mainly two heuristic functions. The first heuristic function represents a simple relaxation of the acyclicity constraint of a Bayesian network. Although admissible and consistent, the heuristic may introduce too much relaxation and result in a loose bound. The second heuristic function reduces the amount of relaxation by avoiding directed cycles within some groups of variables. Empirical results show that these methods constitute a promising approach to learning optimal Bayesian network structures.
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Yang Q, Liu H, Qu L, Fu X, Yu Y, Yu G, Tian H, Yu Y, Sun D, Peng J, Bao F, Yuan C, Lu N, Li J, Zhang Y, Zhang F. Investigation of 20 non-HLA (human leucocyte antigen) psoriasis susceptibility loci in Chinese patients with psoriatic arthritis and psoriasis vulgaris. Br J Dermatol 2013; 168:1060-5. [PMID: 23252691 DOI: 10.1111/bjd.12142] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Recently, a number of non-HLA (human leucocyte antigen) psoriasis genetic susceptibility loci have been identified through genome-wide association studies, but data on their association with psoriatic arthritis (PsA) are lacking. OBJECTIVES To investigate recently identified psoriasis susceptibility loci in a cohort of Chinese patients with PsA, psoriasis vulgaris (PsV) and healthy controls. METHODS Twenty single-nucleotide polymorphisms (SNPs) from 20 loci were selected for genotyping in 379 patients with PsA, 595 patients with PsV and 1181 healthy controls using the MassARRAY platform (Sequenom, San Diego, CA, U.S.A.). Data handling, quality control and association were performed using PLINK software, v. 1.07. The Cochran-Armitage trend test was used to test the genotype-phenotype association. RESULTS PsA showed a significant association with markers at TNIP1 (rs17728338, P = 2.20 × 10(-8)), IL28RA (rs4649203, P = 5.04 × 10(-6)), IL12B (rs2082412, P = 3.82 × 10(-5)), ERAP1 (rs27524, P = 1.25 × 10(-3)), PTTG1 (rs2431697, P = 1.22 × 10(-3)) and GJB2 (rs3751385, P = 1.48 × 10(-3)) when compared with the control group. In PsV a significant association was found for IL28RA (rs4649203, P = 9.53 × 10(-7)), TNIP1 (rs17728338, P = 1.21 × 10(-4)) and ERAP1 (rs27524, P = 1.17 × 10(-3)). The allele frequencies were not statistically different between PsA and PsV except for SNPs at IL12B and ZNF816A with a nominal P-value of 0.04 and 0·01, respectively. CONCLUSIONS This study provides evidence for the involvement of ERAP1, IL28RA, GJB2 and PTTG1 loci in PsA susceptibility and confirmed the previously reported association with PsA and PsV. These results support the hypothesis that genetic aetiology of psoriasis is the same in both PsA and PsV and also support the higher genetic component of PsA than PsV.
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