76
|
Möncke D, Kamitsos EI, Palles D, Limbach R, Winterstein-Beckmann A, Honma T, Yao Z, Rouxel T, Wondraczek L. Transition and post-transition metal ions in borate glasses: Borate ligand speciation, cluster formation, and their effect on glass transition and mechanical properties. J Chem Phys 2017; 145:124501. [PMID: 27782649 DOI: 10.1063/1.4962323] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A series of transition and post-transition metal ion (Mn, Cu, Zn, Pb, Bi) binary borate glasses was studied with special consideration of the cations impact on the borate structure, the cations cross-linking capacity, and more generally, structure-property correlations. Infrared (IR) and Raman spectroscopies were used for the structural characterization. These complementary techniques are sensitive to the short-range order as in the differentiation of tetrahedral and trigonal borate units or regarding the number of non-bridging oxygen ions per unit. Moreover, vibrational spectroscopy is also sensitive to the intermediate-range order and to the presence of superstructural units, such as rings and chains, or the combination of rings. In order to clarify band assignments for the various borate entities, examples are given from pure vitreous B2O3 to meta-, pyro-, ortho-, and even overmodified borate glass compositions. For binary metaborate glasses, the impact of the modifier cation on the borate speciation is shown. High field strength cations such as Zn2+ enhance the disproportionation of metaborate to polyborate and pyroborate units. Pb2+ and Bi3+ induce cluster formation, resulting in PbOn- and BiOn-pseudophases. Both lead and bismuth borate glasses show also a tendency to stabilize very large superstructural units in the form of diborate polyanions. Far-IR spectra reflect on the bonding states of modifier cations in glasses. The frequency of the measured cation-site vibration band was used to obtain the average force constant for the metal-oxygen bonding, FM-O. A linear correlation between glass transition temperature (Tg) and FM-O was shown for the metaborate glass series. The mechanical properties of the glasses also correlate with the force constant FM-O, though for cations of similar force constant the fraction of tetrahedral borate units (N4) strongly affects the thermal and mechanical properties. For paramagnetic Cu- and Mn-borate glasses, N4 was determined from the IR spectra after deducing the relative absorption coefficient of boron tetrahedral versus boron trigonal units, α = α4/α3, using NMR literature data of the diamagnetic glasses.
Collapse
|
77
|
Yao Z, Liu C, Jung P. Diffusion and Permeation of Deuterium in EUROFER97: Effect of Irradiation and of Implanted Helium. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst05-a1077] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
78
|
Yu L, Di Y, Xin L, Ren Y, Liu X, Sun X, Zhang W, Yao Z, Yang J. SND1 acts as a novel gene transcription activator recognizing the conserved Motif domains of Smad promoters, inducing TGFβ1 response and breast cancer metastasis. Oncogene 2017; 36:3903-3914. [DOI: 10.1038/onc.2017.30] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 12/29/2016] [Accepted: 12/30/2016] [Indexed: 02/06/2023]
|
79
|
Wang B, Yan L, Yao Z, Roskos LK. Population Pharmacokinetics and Pharmacodynamics of Benralizumab in Healthy Volunteers and Patients With Asthma. CPT-PHARMACOMETRICS & SYSTEMS PHARMACOLOGY 2017; 6:249-257. [PMID: 28109128 PMCID: PMC5397562 DOI: 10.1002/psp4.12160] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 11/10/2016] [Accepted: 11/13/2016] [Indexed: 01/22/2023]
Abstract
Benralizumab is a humanized, afucosylated, anti‐interleukin‐5 receptor α, immunoglobulin G (IgG) 1 κ monoclonal antibody. We developed a population pharmacokinetic (PK)/pharmacodynamic (PD) model for benralizumab by analyzing PK and blood eosinophil count data from two healthy volunteer studies (N = 48) and four studies in patients with asthma (N = 152). Benralizumab PK was dose‐proportional and adequately described by a two‐compartment model with first‐order elimination from the central compartment and first‐order absorption from the subcutaneous dosing site. The estimated systemic clearance and volume of distribution were typical for human IgG. Body weight and high‐titer antidrug antibodies were identified as relevant covariates influencing the PK of benralizumab. Depletion of blood eosinophil counts was depicted by a modified transit model in which benralizumab induced depletion of eosinophils in each age compartment. Stochastic simulations supported an every‐8‐week dosing schedule of benralizumab for a phase IIb study in patients with uncontrolled asthma.
Collapse
|
80
|
Dong H, Ma L, Gan J, Lin W, Chen C, Yao Z, Du L, Zheng L, Ke C, Huang X, Song H, Kumar R, Yeung SC, Zhang H. PTPRO represses ERBB2-driven breast oncogenesis by dephosphorylation and endosomal internalization of ERBB2. Oncogene 2017; 36:410-422. [PMID: 27345410 PMCID: PMC5269534 DOI: 10.1038/onc.2016.213] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Revised: 05/05/2016] [Accepted: 05/08/2016] [Indexed: 02/05/2023]
Abstract
The plasma membrane-associated tyrosine phosphatase PTPRO is frequently transcriptionally repressed in cancers and signifies poor prognosis of breast cancer patients. In this study, deletion of Ptpro in MMTV-Erbb2 transgenic mice dramatically shortened the mammary tumor latency and accelerated tumor growth due to loss of Ptpro within the breast cancer cells but not in surrounding tissue as confirmed by hetero-transplantation studies. Both in vitro and in vivo data demonstrated that the phosphatase activity was required for the inactivation of ERBB2 and its downstream signaling. PTPRO regulated the phosphorylation status of ERBB2 at Y1248. Co-immunoprecipitation and proximity ligation assay (Duolink) indicated that PTPRO directly physically interacted with ERBB2. Moreover, PTPRO phosphatase activity shortened the half-life of ERBB2 by increasing endocytotic degradation. PTPRO reexpression by demethylation treatment using 5-azacytidine reduced the proliferation and colony formation potential in ERBB2-positive breast cancer cells. Taken together, PTPRO inhibited ERBB2-driven breast cancer through dephosphorylation leading to dual effects of ERBB2 signaling suppression and endosomal internalization of ERBB2, Therefore, reexpression of PTPRO may be a potential therapy for ERBB2-overexpressing breast cancer.
Collapse
|
81
|
Lin TH, Pajarinen J, Lu L, Nabeshima A, Cordova LA, Yao Z, Goodman SB. NF-κB as a Therapeutic Target in Inflammatory-Associated Bone Diseases. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2016; 107:117-154. [PMID: 28215222 DOI: 10.1016/bs.apcsb.2016.11.002] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Inflammation is a defensive mechanism for pathogen clearance and maintaining tissue homeostasis. In the skeletal system, inflammation is closely associated with many bone disorders including fractures, nonunions, periprosthetic osteolysis (bone loss around orthopedic implants), and osteoporosis. Acute inflammation is a critical step for proper bone-healing and bone-remodeling processes. On the other hand, chronic inflammation with excessive proinflammatory cytokines disrupts the balance of skeletal homeostasis involving osteoblastic (bone formation) and osteoclastic (bone resorption) activities. NF-κB is a transcriptional factor that regulates the inflammatory response and bone-remodeling processes in both bone-forming and bone-resorption cells. In vitro and in vivo evidences suggest that NF-κB is an important potential therapeutic target for inflammation-associated bone disorders by modulating inflammation and bone-remodeling process simultaneously. The challenges of NF-κB-targeting therapy in bone disorders include: (1) the complexity of canonical and noncanonical NF-κB pathways; (2) the fundamental roles of NF-κB-mediated signaling for bone regeneration at earlier phases of tissue damage and acute inflammation; and (3) the potential toxic effects on nontargeted cells such as lymphocytes. Recent developments of novel inhibitors with differential approaches to modulate NF-κB activity, and the controlled release (local) or bone-targeting drug delivery (systemic) strategies, have largely increased the translational application of NF-κB therapy in bone disorders. Taken together, temporal modulation of NF-κB pathways with the combination of recent advanced bone-targeting drug delivery techniques is a highly translational strategy to reestablish homeostasis in the skeletal system.
Collapse
|
82
|
Zhang J, Cheng R, Liang J, Ni C, Li M, Yao Z. Report of a child with sporadic familial progressive hyper- and hypopigmentation caused by a novel KITLG mutation. Br J Dermatol 2016; 175:1369-1371. [PMID: 27106731 DOI: 10.1111/bjd.14694] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
83
|
Xiao H, Yao Z, Peng Q, Ni F, Sun Y, Zhang C, Zhong Z. Extraction of squalene from camellia oil by silver ion complexation. Sep Purif Technol 2016. [DOI: 10.1016/j.seppur.2016.05.041] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
84
|
Li M, Li Z, Wang J, Ni C, Sun Z, Wilson NJ, Zhang J, Chen F, Li X, Du X, Yu H, Zhang L, Smith FJD, Zhang G, Yao Z. Mutations in the mevalonate pathway genes in Chinese patients with porokeratosis. J Eur Acad Dermatol Venereol 2016; 30:1512-7. [PMID: 27422687 DOI: 10.1111/jdv.13653] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Accepted: 02/11/2016] [Indexed: 12/26/2022]
Abstract
BACKGROUND Porokeratosis (PK, MIM 175800) is a chronic autosomal dominant cutaneous keratinization disorder, which has a wide variety of clinical manifestations. OBJECTIVES We analysed the molecular basis of 10 families and 12 sporadic cases with different subtypes of porokeratosis in the Chinese population. METHODS Genomic DNA was extracted from peripheral blood samples. Mutation screening was performed by direct sequencing of exons and flanking intron-exon boundaries for the entire coding region of four mevalonate pathway genes and SLC17A9 gene. RESULTS We detected three novel mutations and seven previously described mutations by direct sequence analysis of the PCR products. Mutations p.Phe249Ser and p.Asn292Ser in mevalonate decarboxylase (MVD) were the most common mutations in this PK cohort; their presence was 27.3% and 13.6% respectively. CONCLUSIONS This study extended the mutation spectrum of PK in the Chinese Han population and provided further evidence for the genetic basis of PK. We first identified MVD simultaneously responsible for porokeratosis palmaris et plantaris disseminate development and confirmed the genotype-phenotype correlations.
Collapse
|
85
|
Ma R, Li T, Cao M, Si Y, Wu X, Zhao L, Yao Z, Zhang Y, Fang S, Deng R, Novakovic VA, Bi Y, Kou J, Yu B, Yang S, Wang J, Zhou J, Shi J. Extracellular DNA traps released by acute promyelocytic leukemia cells through autophagy. Cell Death Dis 2016; 7:e2283. [PMID: 27362801 PMCID: PMC5108337 DOI: 10.1038/cddis.2016.186] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Revised: 05/27/2016] [Accepted: 05/31/2016] [Indexed: 12/30/2022]
Abstract
Acute promyelocytic leukemia (APL) cells exhibit disrupted regulation of cell death and differentiation, and therefore the fate of these leukemic cells is unclear. Here, we provide the first evidence that a small percentage of APL cells undergo a novel cell death pathway by releasing extracellular DNA traps (ETs) in untreated patients. Both APL and NB4 cells stimulated with APL serum had nuclear budding of vesicles filled with chromatin that leaked to the extracellular space when nuclear and cell membranes ruptured. Using immunofluorescence, we found that NB4 cells undergoing ETosis extruded lattice-like structures with a DNA-histone backbone. During all-trans retinoic acid (ATRA)-induced cell differentiation, a subset of NB4 cells underwent ETosis at days 1 and 3 of treatment. The levels of tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) were significantly elevated at 3 days, and combined treatment with TNF-α and IL-6 stimulated NB4 cells to release ETs. Furthermore, inhibition of autophagy by pharmacological inhibitors or by small interfering RNA against Atg7 attenuated LC3 autophagy formation and significantly decreased ET generation. Our results identify a previously unrecognized mechanism for death in promyelocytes and suggest that ATRA may accelerate ET release through increased cytokines and autophagosome formation. Targeting this cellular death pathway in addition to conventional chemotherapy may provide new therapeutic modalities for APL.
Collapse
|
86
|
Al-Dhohorah T, Mashrah M, Yao Z, Huang J. Aberrant DKK3 expression in the oral leukoplakia and oral submucous fibrosis: a comparative immunohistochemical study. Eur J Histochem 2016; 60:2629. [PMID: 27349317 PMCID: PMC4933828 DOI: 10.4081/ejh.2016.2629] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 05/09/2016] [Accepted: 06/01/2016] [Indexed: 11/23/2022] Open
Abstract
We aimed to assess and compare the expression of Dickkopf homolog 3 (DKK3), a possible tumor suppressor gene (TSG), in oral leukoplakia (OLK) and oral submucous fibrosis (OSF) using immunohistochemistry. Seventy-five cases of normal oral mucosa (NOM), OLK, OSF, and squamous cell carcinoma (OSCC) were studied. DKK3 was expressed in all cases of NOM, OLK and OSCC. There was steady increases in the percentage of the positive cells progressing toward OSCC. The expression was localized in the cytoplasm and cell membrane of cell affected by OLK with mild dysplasia and OLK with severe dysplasia. No significant association was observed between DKK3 expression and dysplastic status of OLK. Loss of DKK3 expression was observed in 15 of 30 cases in the OSF group, which was significantly associated with histological grade of OSF (P<0.0001). The percentage of positive cells gradually declined with the increasing severity of epithelial atrophy. A significant difference (P<0.01) was observed when comparing DKK3 expression among different groups of OLK and OSF cases. DKK3 may have diverse expressions in oral premalignant lesions. Loss of DKK3 expression in dysplastic/advanced stage of OSF may imply a high risk of progression to oral cancer.
Collapse
|
87
|
Gibon E, Loi F, Córdova LA, Pajarinen J, Lin T, Lu L, Nabeshima A, Yao Z, Goodman SB. Aging Affects Bone Marrow Macrophage Polarization: Relevance to Bone Healing. REGENERATIVE ENGINEERING AND TRANSLATIONAL MEDICINE 2016; 2:98-104. [PMID: 28138512 PMCID: PMC5270653 DOI: 10.1007/s40883-016-0016-5] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Accepted: 06/06/2016] [Indexed: 12/23/2022]
Abstract
Macrophages are an important component of the inflammatory cascade by initiating and modulating the processes leading to tissue regeneration and bone healing. Depending on the local environment, macrophages can be polarized into M1 (pro-inflammatory) or M2 (anti-inflammatory) phenotypes. In order to assess the effects of aging on macrophage function, bone marrow macrophage polarization using primary bone marrow macrophages (BMMs) from young (8 weeks old) and aged (72 weeks old) wild-type male C57BL/6J mice was analyzed. Fluorescence-activated cell sorting (FACS) analysis (CD11b, iNOS, CD206), qRT-PCR (iNOS, TNF-α, CD206, Arginase 1), and ELISA (TNF-α, IL-1ra) were performed to compare the M1 and M2 phenotypic markers in young and aged mouse macrophages. Once M1 and M2 macrophage phenotypes were confirmed, the results showed that TNF-α mRNA was significantly upregulated in aged M1s after interferon gamma (INF-γ) exposure. Arginase 1 and CD206 mRNA expression were still upregulated with IL4 stimulation in aged macrophages, but to a lesser extend than those from younger animals. TNF-α secretion was also significantly increased in aged M1s compared to young M1s, following lipopolysaccharide (LPS) exposure. However, the IL-1ra secretion did not increase accordingly in aged mice. The results demonstrate that, compared to younger animals, aging of bone marrow derived macrophages increases the resting levels of oxidative stress, and the ratios of pro- to anti-inflammatory markers. These age-related changes in macrophage polarization may explain in part the attenuated response to adverse stimuli and delay in processes such as fracture healing seen in the elderly. LAY SUMMARY Bone healing is a complex process that involves both biological and mechanical factors. Macrophages are key cells that regulate the events involved in bone healing, especially the initial inflammatory phase. In this biological cascade of events, macrophages present as different functional phenotypes including uncommitted (M0), pro-inflammatory (M1), and anti-inflammatory (M2), a process called macrophage polarization. A clear understanding of the effects of aging on macrophage polarization is critical to modulating adverse events such as fractures, atraumatic bone loss, and tissue regeneration in an aging population.
Collapse
|
88
|
Peng H, He Y, Zheng G, Zhang W, Yao Z, Xie W. Meta-analysis of traditional herbal medicine in the treatment of nonalcoholic fatty liver disease. Cell Mol Biol (Noisy-le-grand) 2016; 62:88-95. [PMID: 27188741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 04/19/2016] [Indexed: 06/05/2023]
Abstract
Traditional Chinese herbal medicine (TCM) has been found effective for nonalcoholic fatty liver disease (NAFLD) based on its unique theory system and substantial herb remedies. The aim of this meta-analysis was to evaluate the efficiency and safety of one of the TCM, Danshen in the treatment of NAFLD. Seven English and Chinese databases were searched from inceptions to December 2015. RCTs which compared Danshen with placebo in adult patients with NAFLD were included. Totally, 8 RCTs with a total of 800 patients were identified. The results showed that compared with placebo, Danshen had increased total effectiveness rate, lower level of ALT, AST, TC and TG, LDL and higher level of liver/spleen computed tomography ratio. The present meta-analysis suggests that Danshen may have positive effects on nonalcoholic fatty liver disease. Future multicenter large-sample randomized clinical trials are still needed to confirm the efficacy and safety of our study.
Collapse
|
89
|
Zhang J, Cheng R, Liang J, Ni C, Li M, Yao Z. Lentiginous phenotypes caused by diverse pathogenic genes (SASH1 and PTPN11): clinical and molecular discrimination. Clin Genet 2016; 90:372-7. [PMID: 27659786 DOI: 10.1111/cge.12728] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Revised: 01/05/2016] [Accepted: 01/06/2016] [Indexed: 02/03/2023]
Abstract
Pathogenic mutations in genes (SASH1 and PTPN11) can cause a rare genetic disorder associated with pigmentation defects and the well-known LEOPARD syndrome, respectively. Both conditions presented with lentiginous phenotypes. The aim of this study was to arrive at definite diagnoses of three Chinese boys with clinically suspected lentigines-related syndromes. ADAR1, ABCB6, SASH1 and PTPN11 were candidate genes for mutational screening. Sanger sequencing was performed to identify the mutations, whereas bioinformatic analysis was used to predict the pathogenicity of novel missense mutations. Two novel mutations c.1537A>C (p.Ser513Arg) and 1527_1530dupAAGT (p.Leu511Lysfs*21) in SASH1 and a common p.Thr468Met mutation in PTPN11 were detected in three pediatric patients with lentiginous phenotypes, respectively. Comparisons between clinical presentations showed that SASH1-related phenotypes can exhibit hyper- and hypopigmentation on the trunk and extremities, similar to dyschromatosis, while scattered café au-lait spots usually appeared in PTPN11-related LEOPARD syndrome. Furthermore, the similarity in the clinical presentations of Peutz-Jeghers syndrome, Laugier-Hunziker syndrome, xeroderma pigmentosum, neurofibromatosis type I, suggesting that these conditions should be added into the differential diagnoses of lentiginous phenotypes.
Collapse
|
90
|
Yao Z. Catalytic Activities of Transition Metal Phosphides for NO Dissociation and Reduction With CO. CHEM BIOCHEM ENG Q 2016. [DOI: 10.15255/cabeq.2014.2133] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
91
|
Li M, Wang J, Zhang J, Ni C, Li X, Liang J, Cheng R, Li Z, Yao Z. Genome-wide linkage and exome sequencing analyses identify an initiation codon mutation ofKRT5in a unique Chinese family with generalized Dowling-Degos disease. Br J Dermatol 2015; 174:663-6. [PMID: 26440693 DOI: 10.1111/bjd.14178] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
92
|
Sun Z, Guo Y, Li M, Yao Z. Genotype analysis of varicella-zoster virus isolates from suburban Shanghai Municipal Province, China. J Med Microbiol 2015; 65:123-128. [PMID: 26654224 DOI: 10.1099/jmm.0.000208] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
To determine the predominant genotype of the varicella-zoster virus (VZV) in suburban Shanghai Municipal Province, specimens were collected from the lesions of 95 outpatients clinically diagnosed with varicella or herpes zoster. Of these, 69 patients (72.6%) were positive for VZV DNA. The 69 isolates were all genotyped as the genotype J1/clade 2. Based on sequencing of the 447 bp sequence in ORF22, 66 isolates were identified as genotype J/clade 2 strains and three were identified as type M2/clade 4 strains. To confirm the classification of these three strains, we determined the presence of 27 single-nucleotide polymorphisms (SNPs) and found that isolates 1270/1450 shared seven SNPs that differed from those of clade 2, in which three SNPs were unique to clade 3 and another three were unique to clade 4. Isolate 1456 had two markers of clade 4 that differed from clade 2. The phylogenetic tree showed that our isolates clustered primarily with clade 2 and that the three M2/J1 strains clustered between clades 2 and 4. It is likely that isolates 1270/1450/1446 may represent a new subclade of either clade 2 or 4, or some recombinant events. In addition, our isolates were WT strains. We also observed significant inter-strain variations.
Collapse
|
93
|
Zhang J, Yan M, Cheng R, Ni C, Liang J, Li M, Yao Z. A rare RECQL4 indel mutation in a Chinese patient with Rothmund-Thomson syndrome. J Eur Acad Dermatol Venereol 2015; 30:e159-e161. [PMID: 26515231 DOI: 10.1111/jdv.13466] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
94
|
Wilson D, Hyde E, Wilson D, Claridge S, Leong K, Salciccioli J, Conroy R, Ganesha Babu G, Scott P, Manupati S, Lazdam M, Leventogiannis G, Barr C, Morgan J, Plank G, Rinaldi C, Niederer S, Zeljko H, Leventopoulos G, Ahmed N, Thomas G, Duncan E, Rodderick P, Morgan J, Chen Z, Jackson T, Behar J, Ali M, Bostock J, Lumley M, Williams R, Assress K, De Silva K, Gill J, Perera D, Rinaldi C, Ng F, Kanapeckaite L, Hu M, Roney C, Lim P, Harding S, Peters N, Varnava A, Kanagaratnam P, Marshall D, Sykes M, Lim P, Lee S, Rotheram N, Macedo A, Cobb V, Providencia R, Srinivasan N, Ahsan S, Chow A, Murgatroyd F, Silberbauer J, Hooper J, Zaman M, Yao Z, Zaidi A, Ahmed F, Virdee M, Heck P, Agarwal S, Lee J, Grace A, Begley D, Fynn S. Posters 2. Europace 2015; 17:v22-v25. [PMCID: PMC4892099 DOI: 10.1093/europace/euv330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2023] Open
|
95
|
Gudino N, Sonmez M, Yao Z, Baig T, Nielles-Vallespin S, Faranesh AZ, Lederman RJ, Martens M, Balaban RS, Hansen MS, Griswold MA. Parallel transmit excitation at 1.5 T based on the minimization of a driving function for device heating. Med Phys 2015; 42:359-71. [PMID: 25563276 DOI: 10.1118/1.4903894] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
PURPOSE To provide a rapid method to reduce the radiofrequency (RF) E-field coupling and consequent heating in long conductors in an interventional MRI (iMRI) setup. METHODS A driving function for device heating (W) was defined as the integration of the E-field along the direction of the wire and calculated through a quasistatic approximation. Based on this function, the phases of four independently controlled transmit channels were dynamically changed in a 1.5 T MRI scanner. During the different excitation configurations, the RF induced heating in a nitinol wire immersed in a saline phantom was measured by fiber-optic temperature sensing. Additionally, a minimization of W as a function of phase and amplitude values of the different channels and constrained by the homogeneity of the RF excitation field (B1) over a region of interest was proposed and its results tested on the benchtop. To analyze the validity of the proposed method, using a model of the array and phantom setup tested in the scanner, RF fields and SAR maps were calculated through finite-difference time-domain (FDTD) simulations. In addition to phantom experiments, RF induced heating of an active guidewire inserted in a swine was also evaluated. RESULTS In the phantom experiment, heating at the tip of the device was reduced by 92% when replacing the body coil by an optimized parallel transmit excitation with same nominal flip angle. In the benchtop, up to 90% heating reduction was measured when implementing the constrained minimization algorithm with the additional degree of freedom given by independent amplitude control. The computation of the optimum phase and amplitude values was executed in just 12 s using a standard CPU. The results of the FDTD simulations showed similar trend of the local SAR at the tip of the wire and measured temperature as well as to a quadratic function of W, confirming the validity of the quasistatic approach for the presented problem at 64 MHz. Imaging and heating reduction of the guidewire were successfully performed in vivo with the proposed hardware and phase control. CONCLUSIONS Phantom and in vivo data demonstrated that additional degrees of freedom in a parallel transmission system can be used to control RF induced heating in long conductors. A novel constrained optimization approach to reduce device heating was also presented that can be run in just few seconds and therefore could be added to an iMRI protocol to improve RF safety.
Collapse
|
96
|
Shen J, Zhang J, Wang Z, Ni C, Li H, Cheng R, Liang J, Li M, Yao Z. Gene diagnosis and prenatal genetic diagnosis of a case of dystrophic epidermolysis bullosa family caused by gonadosomatic mosaicism for the COL7A1 mutation p.Gly2043Arg in the pregnant mother. J Eur Acad Dermatol Venereol 2015; 30:1627-9. [PMID: 26289024 DOI: 10.1111/jdv.13229] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
97
|
Yao Z, Wang Z, Yuan N, Liang Z, Zhou Y. Delayed signal transmission in area 17, area 18 and the posteromedial lateral suprasylvian area of aged cats. Neuroscience 2015; 289:358-66. [PMID: 25595968 DOI: 10.1016/j.neuroscience.2015.01.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Revised: 12/14/2014] [Accepted: 01/06/2015] [Indexed: 11/28/2022]
Abstract
To investigate the effect of senescence on signal transmission, we have compared the visual response latency and spontaneous activity of cells in the lateral geniculate nucleus (LGN), area 17, area 18 and posteromedial lateral suprasylvian area (PMLS) of young and old cats. We found that LGN cells in old cats exhibit largely normal visual response latency. In contrast, all the other three areas exhibited significant aging-related delays in the visual response latency. On average, PMLS showed most pronounced delays among these three areas. Area 18 slowed more than area 17, but this was not significant. The degradation of signal timing in the visual cortex might provide insight into neuronal response mechanism underlying perception slowing during aging.
Collapse
|
98
|
Zhang J, Cheng R, Ni C, Liang J, Li M, Yao Z. First Mal de Meleda report in Chinese Mainland: two families with a recurrent homozygous missense mutation in SLURP-1. J Eur Acad Dermatol Venereol 2015; 30:871-3. [PMID: 25763536 DOI: 10.1111/jdv.13038] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
99
|
Sun Z, Zhang J, Guo Y, Ni C, Liang J, Cheng R, Li M, Yao Z. Genotype-phenotype correlation of xeroderma pigmentosum in a Chinese Han population. Br J Dermatol 2015; 172:1096-102. [PMID: 25256075 DOI: 10.1111/bjd.13429] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/17/2014] [Indexed: 12/14/2022]
|
100
|
Ye X, Yao Z, Xu Y, Zhou S, Gao Y, Chen S, Yang Y. Frequency-risk and duration-risk relations between second-hand smoke exposure and menopausal symptoms among middle-aged women in Guangzhou, China. Climacteric 2014; 18:323-8. [DOI: 10.3109/13697137.2014.964672] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|