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Nestadt G, Wang Y, Grados MA, Riddle MA, Greenberg BD, Knowles JA, Fyer AJ, McCracken JT, Rauch SL, Murphy DL, Rasmussen SA, Cullen B, Piacentini J, Geller D, Pauls D, Bienvenu OJ, Chen Y, Liang KY, Goes FS, Maher B, Pulver AE, Shugart YY, Valle D, Samuels JF, Chang YC. Homeobox genes in obsessive-compulsive disorder. Am J Med Genet B Neuropsychiatr Genet 2012; 159B:53-60. [PMID: 22095678 PMCID: PMC3250212 DOI: 10.1002/ajmg.b.32001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2011] [Accepted: 10/20/2011] [Indexed: 11/07/2022]
Abstract
BACKGROUND Despite evidence that obsessive-compulsive disorder (OCD) is a familial neuropsychiatric condition, progress aimed at identifying genetic determinants of the disorder has been slow. The OCD Collaborative Genetics Study (OCGS) has identified several OCD susceptibility loci through linkage analysis. METHODS In this study we investigate two regions on chromosomes 15q and 1q by first refining the linkage region using additional short tandem repeat polymorphic (STRP) markers. We then performed association analysis on single nucleotide polymorphisms (SNP) genotyped (markers placed every 2-4 kb) in the linkage regions in the OCGS sample of 376 rigorously phenotyped affected families. RESULTS Three SNPs are most strongly associated with OCD: rs11854486 (P = 0.00005 [0.046 after adjustment for multiple tests]; genetic relative risk (GRR) = 11.1 homozygous and 1.6 heterozygous) and rs4625687 [P = 0.00007 (after adjustment = 0.06); GRR = 2.4] on 15q; and rs4387163 (P = 0.0002 (after adjustment = 0.08); GRR = 1.97) on 1q. The first SNP is adjacent to NANOGP8, the second SNP is in MEIS2, and the third is 150 kb between PBX1 and LMX1A. CONCLUSIONS All the genes implicated by association signals are homeobox genes and are intimately involved in neurodevelopment. PBX1 and MEIS2 exert their effects by the formation of a heterodimeric complex, which is involved in development of the striatum, a brain region involved in the pathophysiology of OCD. NANOGP8 is a retrogene of NANOG, a homeobox transcription factor known to be involved in regulation of neuronal development. These findings need replication; but support the hypothesis that genes involved in striatal development are implicated in the pathogenesis of OCD.
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Wu KH, Chang YC, Zheng MZ, Yang CC, Lin WP. Preparation and characterization of Ag-deposited aminosilane-modified silicate by chemical reduction method. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/polb.22205] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Lee CH, Chuang HY, Hong CH, Huang SK, Chang YC, Ko YC, Yu HS. Lifetime exposure to cigarette smoking and the development of adult-onset atopic dermatitis. Br J Dermatol 2011; 164:483-9. [PMID: 21054333 DOI: 10.1111/j.1365-2133.2010.10116.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
BACKGROUND Adult-onset atopic dermatitis (AD) has recently been recognized as a distinct disease entity, but its risk factors have not yet been clearly defined. Although gestational and perinatal exposure to tobacco smoking may be associated with the development of classic AD, the association between active/passive smoking and adult-onset AD remains controversial. OBJECTIVES To determine if exposure to smoking, including environmental tobacco smoke (ETS), is associated with the risk of adult-onset AD. METHODS Tobacco smoking and exposure to ETS were measured in a case-control association analysis in 83 patients with physician-diagnosed adult-onset AD and 142 age- and sex-matched controls. RESULTS Multiple logistic regression analyses showed that, among the potential environmental risk factors, both current and ever smoking were significant risk factors for adult-onset AD [odds ratio (OR) 4·994 and 3·619, respectively], compared with never smoking. Also, packs per year was significantly associated with adult-onset AD (OR 1·058, 95% confidence interval 1·028-1·089), suggesting a lifelong cumulative risk in current smokers. Moreover, nonsmokers with adult-onset AD reported significantly more exposure to ETS. CONCLUSIONS Early and/or current exposure to cigarette smoking may contribute cumulatively to the development of adult-onset AD. Exposure to ETS in childhood is associated with the development of adult-onset AD. Adults should be discouraged from smoking to prevent adult-onset AD in themselves and their family members.
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Wei J, Yang HS, Tsai SK, Hsiung MC, Chang CY, Ou CH, Chang YC, Lee KC, Sue SH, Chou YP. Emergent bedside real-time three-dimensional transesophageal echocardiography in a patient with cardiac arrest following a caesarean section. EUROPEAN JOURNAL OF ECHOCARDIOGRAPHY 2010; 12:E16. [DOI: 10.1093/ejechocard/jeq161] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Wang CM, Way TD, Chang YC, Yen NT, Hu CL, Nien PC, Jea YS, Chen LR, Kao JY. The origin of the white Roman goose. Biochem Genet 2010; 48:938-43. [PMID: 20820906 DOI: 10.1007/s10528-010-9374-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2009] [Accepted: 05/14/2010] [Indexed: 11/28/2022]
Abstract
In order to avoid interference from nuclear copies of mitochondrial DNA (numts), mtDNA of the white Roman goose (domestic goose) was extracted from liver mitochondria. The mtDNA control region was amplified using a long PCR strategy and then sequenced. Neighbor-joining, maximum parsimony, and maximum-likelihood approaches were implemented using the 1,177 bp mtDNA control region sequences to compute the phylogenetic relationships of the domestic goose with other geese. The resulting identity values for the white Roman geese were 99.1% (1,166/1,177) with western graylag geese and 98.8% (1,163/1,177) with eastern graylag geese. In molecular phylogenetic trees, the white Roman goose was grouped in the graylag lineage, indicating that the white Roman goose came from the graylag goose (Anser anser). Thus, the scientific name of the white Roman goose should be Anser anser 'White Roman.'
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Wei J, Hsiung MC, Tsai SK, Ou CH, Chang CY, Chang YC, Lee KC, Sue SH, Chou YP. The routine use of live three-dimensional transesophageal echocardiography in mitral valve surgery: clinical experience. EUROPEAN JOURNAL OF ECHOCARDIOGRAPHY 2009; 11:14-8. [DOI: 10.1093/ejechocard/jep173] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Liu YC, Huang CL, Wu PL, Chang YC, Huang CH, Lane HY. Lack of association between AKT1 variances versus clinical manifestations and social function in patients with schizophrenia. J Psychopharmacol 2009; 23:937-43. [PMID: 18635704 DOI: 10.1177/0269881108093840] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The elucidation of genotype-phenotype relationships in psychiatric research is at an early stage. V-akt murine thymoma viral oncogene homolog 1 (AKT1) is a serine/threonine kinase known as protein kinase B. Emerging studies have implicated the role of AKT1 in pathogenesis of schizophrenia; however, the findings have not been consistent. This study aims to examine the association of AKT1 polymorphisms with drug-free and post-treatment symptomatology and social function in patients with schizophrenia. One hundred and twenty newly hospitalised patients with acutely exacerbated schizophrenia who had never been treated by atypical antipsychotics were recruited. They received optimal treatment of risperidone for up to 42 days in the inpatient research unit. Clinical manifestations were monitored by Positive and Negative Syndrome Scale (PANSS) and social function by Nurses' Observation Scale for Inpatients Evaluation (NOSIE). Patients were genotyped for eight AKT1 Single Nucleotide Polymorphism (SNPs), which have been previously investigated for association with schizophrenia. At drug-free status and after best possible treatment of risperidone, genotypes of each SNP did not influence performances in NOSIE, PANSS-total, -positive, -negative and -general psychopathology profiles. These results suggest that AKT1 does not play a significant role in clinical and functional manifestations in patients with schizophrenia who receive risperidone treatment. Future research should also focus on the relationships between genotypes of other susceptibility genes and phenotypes or functional outcomes of schizophrenia.
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Lee CH, Wen ZH, Chang YC, Huang SY, Tang CC, Chen WF, Hsieh SP, Hsieh CS, Jean YH. Intra-articular magnesium sulfate (MgSO4) reduces experimental osteoarthritis and nociception: association with attenuation of N-methyl-D-aspartate (NMDA) receptor subunit 1 phosphorylation and apoptosis in rat chondrocytes. Osteoarthritis Cartilage 2009; 17:1485-93. [PMID: 19490963 DOI: 10.1016/j.joca.2009.05.006] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2009] [Revised: 04/03/2009] [Accepted: 05/04/2009] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To study the effects of intra-articular injection of magnesium sulfate (MgSO(4)) on the development of osteoarthritis (OA) and to examine concomitant changes in the nociceptive behavior of rats. METHODS OA was induced in Wistar rats with intra-articular injection of collagenase (500 U) in the right knee; the left knee was left untreated. In the OA+MgSO(4) group (n=7), the treated knee was injected with 500-microg (0.1-ml) MgSO(4) twice a week for 5 consecutive weeks starting at 1 week after collagenase injection; in the OA group (n=7), the same knee was injected with the same amount of physiological normal saline. In the MgSO(4) group (n=6), naïve rats received only MgSO(4) injections; in the control group (n=6), naïve rats received only physiological normal saline injections. Nociceptive behavior (mechanical allodynia and thermal hyperalgesia) on OA development was measured before and at 1, 2, 4, 6, and 8 weeks after collagenase injection, following which the animals were sacrificed. Gross morphology and histopathology were examined in the femoral condyles, tibial plateau, and synovia. Immunohistochemical analysis was performed to examine the effect of MgSO(4) on N-methyl-D-aspartate (NMDA) receptor subunit 1 phosphorylation (p-NR1) and apoptosis in the articular cartilage chondrocytes. RESULTS OA rats receiving intra-articular MgSO(4) injections showed a significantly lower degree of cartilage degeneration than the rats receiving saline injections. MgSO(4) treatment also suppressed synovitis. Mechanical allodynia and thermal hyperalgesia showed significant improvement in the OA+MgSO(4) group as compared to the OA group. Moreover, MgSO(4) attenuated p-NR1 and chondrocyte apoptosis in OA-affected cartilage. CONCLUSIONS Our results indicate that local intra-articular administration of MgSO(4) following collagenase injection in an experimental rat OA model (1) modulates chondrocyte metabolism through inhibition of cell NMDA receptor phosphorylation and apoptosis, (2) attenuates the development of OA, and (3) concomitantly reduces nociception.
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Chang YC, Lin JW, Wang LC, Chen HM, Hwang JJ, Chuang LM. Association of intraocular pressure with the metabolic syndrome and novel cardiometabolic risk factors. Eye (Lond) 2009; 24:1037-43. [PMID: 19816514 DOI: 10.1038/eye.2009.247] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Wang Y, Samuels JF, Chang YC, Grados MA, Greenberg BD, Knowles JA, McCracken JT, Rauch SL, Murphy DL, Rasmussen SA, Cullen B, Hoehn-Saric R, Pinto A, Fyer AJ, Piacentini J, Pauls DL, Bienvenu OJ, Riddle M, Shugart YY, Liang KY, Nestadt G. Gender differences in genetic linkage and association on 11p15 in obsessive-compulsive disorder families. Am J Med Genet B Neuropsychiatr Genet 2009; 150B:33-40. [PMID: 18425788 DOI: 10.1002/ajmg.b.30760] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Several clinical and genetic studies have reported gender differences in obsessive-compulsive disorder (OCD). Previously, we conducted a linkage genome scan using multipoint allele-sharing methods to test for linkage in 219 families participating in the OCD Collaborative Genetics Study. When these families were stratified by proband's gender, suggestive linkage to chromosome 11p15 at marker D11S2362 (KAC(all) = 2.92, P = 0.00012) was detected in families with male probands, but not in the ones with female probands. We have since conducted fine mapping with a denser microsatellite marker panel in the region of 11p15, and detected a significant linkage signal at D11S4146 (KAC(all) = 5.08, P < 0.00001) in the families of male probands. Subsequently, 632 SNPs were genotyped spanning a 4.0 Mb region of the 1 LOD unit interval surrounding the linkage peak in the original families and an additional 165 families. Six SNPs were associated with OCD (P < 0.001): two SNPs were identified when all the families were included, and four SNPs only in male proband families. No SNP showed significant association with the OCD phenotype only in the families with a female proband. The results suggest a possible gender effect in the etiology of OCD.
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Chang YC, Nagasue N. Blocking intrahepatic inflow and backflow using Chang's needle during hepatic resection: Chang's maneuver. HPB (Oxford) 2008; 10:244-8. [PMID: 18773099 PMCID: PMC2518295 DOI: 10.1080/13651820802166971] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2008] [Indexed: 12/12/2022]
Abstract
BACKGROUND Chang's needle is a straight, 18-gauge stainless steel needle with a hook near its top to catch the thread and can be used for various hepatic resections. Since its introduction in 1996, accumulated experience has shown that using Chang's needle is simple and safe. We recently explored a new application for the needle with an intrahepatic vascular block during hepatic resections. METHODS Using Chang's needle makes whole-thickness interlocking sutures of the liver possible. One or two rows of multiple sutures secure the inflow and backflow while allowing a hepatic parenchymal division with less blood loss. Under ultrasound guidance, single temporary sutures can be made in the respective branches of the Glisson sheath to block inflow, and, on the right or left hepatic vein, to block backflow as well. RESULTS We did 89 hepatic resections without specifically aimed inflow or backflow blocks, including 12 right lobectomies, three trisegmentectomies, 21 bisegmentectomies, and 15 segmentectomies. Twenty-seven patients had mild to severe liver cirrhosis. Specifically aimed inflow blocks for partial hepatic resections were done on the Glisson sheath (G) of segment 8 (two patients), segment 6 (one patient), and segment 3 (one patient). One patient with a G8 block had a concomitant backflow block of the right hepatic vein. Overall, there was no procedure-related mortality or hepatic failure. Ischemia and reperfusion induced liver function deterioration was minimal in the group with this kind of temporary vascular blocks. CONCLUSION In addition to hepatic resections, Chang's maneuver can be used for intrahepatic individual inflow or backflow blocks, or both, to minimize ischemic and reperfusion injuries.
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Yang WC, Wang CW, Wang JC, Chang YC, Hsu HC, Nee TE, Chen LJ, He JH. Aligned Er-doped ZnO nanorod arrays with enhanced 1.54 microm infrared emission. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 2008; 8:3363-3368. [PMID: 19051881 DOI: 10.1166/jnn.2008.164] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Vertically aligned Er-doped ZnO nanorod arrays with sharp and intense 1.54 microm infrared emission have been fabricated on Si substrates through a well controlled spin-coating and annealing process. The synthesis method is advantageous for synthesizing ZnO nanostructures free from structural defects, capability for large-scale production, minimum equipment requirement and product homogeneity. Er atoms were found to incorporate into ZnO lattice from XRD, ESCA, TEM, STEM/EDS and PL measurements. The single-crystal Er-doped nanorods maintained their high microstructural quality after annealing for 4 hr at 800 degreesC. The intensity of 1.54 microm infrared emission was found to be correlated with the deep level green emission. The enhanced luminescence intensity and best ever narrow wavelength distribution of Er-doped ZnO nanorod arrays at 1.54 microm emission will be conductive to applications in optoelectronic devices and optical communications.
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Chiu CH, Yu P, Kuo HC, Chen CC, Lu TC, Wang SC, Hsu SH, Cheng YJ, Chang YC. Broadband and omnidirectional antireflection employing disordered GaN nanopillars. OPTICS EXPRESS 2008; 16:8748-8754. [PMID: 18545588 DOI: 10.1364/oe.16.008748] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Disordered GaN nanopillars of three different heights: 300, 550, and 720 nm are fabricated, and demonstrate broad angular and spectral antireflective characteristics, up to an incident angle of 60? and for the wavelength range of lambda=300-1800 nm. An algorithm based on a rigorous coupled-wave analysis (RCWA) method is developed to investigate the correlations between the reflective characteristics and the structural properties of the nanopillars. The broadband and omnidirectional antireflection arises mainly from the refractive-index gradient provided by nanopillars. Calculations show excellent agreement with the measured reflectivities for both s- and p- polarizations.
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Tsai HY, Chang YC, Tyan YS. SU-GG-I-44: Real-Time Dose Measurements of Automatic Tube Current Modulation in Multislice CT. Med Phys 2008. [DOI: 10.1118/1.2961442] [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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Lin CC, Tsai YL, Li UM, Chang YC, Lin CP, Jeng JH. Horizontal/oblique root fractures in the palatal root of maxillary molars with associated periodontal destruction: case reports. Int Endod J 2008; 41:442-7. [DOI: 10.1111/j.1365-2591.2007.01360.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Wu CW, Chang YC. A Hypothesis Testing Procedure on Assessing Process Performance for Asymmetric Tolerances. COMMUN STAT-THEOR M 2008. [DOI: 10.1080/03610920701813268] [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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Chang YC, Kikuchi S, Kawauchi N, Sato T, Takamizawa K. Complete dechlorination of tetrachloroethylene by use of an anaerobic Clostridium bifermentans DPH-1 and zero-valent iron. ENVIRONMENTAL TECHNOLOGY 2008; 29:381-391. [PMID: 18619143 DOI: 10.1080/09593330801984050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A laboratory test was conducted to examine the combined effect of an anaerobic Clostridium bifermentans DPH-1 and addition of zero-valent iron (Fe0) on the reductive dechlorination of tetrachloroethylene (PCE). In addition, the dechlorination of cis-1,2-dichloroethylene (cDCE) produced from PCE was examined using Fe0. The cDCE produced was completely dechlorinated to non-toxic end products, mostly, ethylene by a subsequent chemical reductive process. Production of ethylene was dramatically increased with increase of initial cDCE concentration in the range of 10.3 microM to 928 microM (1.0-90 mg l(-1)) and the velocity constant was calculated to be 0.38 day(-1). On the other hand, the combined use of strain DPH-1 and Fe0 showed the most significant effect on the initial PCE dechlorination, but cohesion of Fe0 was found to inhibit the dechlorination rate of PCE. It is thought that phosphoric acid iron contained in a medium forms film on the surface of iron particle, so oxidation of iron is inhibited.
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Chao AS, Chao A, Wang TH, Chang YC, Chang YL, Hsieh CC, Lien R, Su WJ. Outcome of antenatally diagnosed cardiac rhabdomyoma: case series and a meta-analysis. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2008; 31:289-295. [PMID: 18307215 DOI: 10.1002/uog.5264] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
OBJECTIVES Rhabdomyoma, the most common primary fetal cardiac tumor, is often associated with tuberous sclerosis (TS). We aimed to evaluate outcome in cases diagnosed with fetal cardiac rhabdomyoma. METHODS This study presents 11 cases with fetal cardiac rhabdomyoma. In addition, all relevant published cases of antenatally diagnosed cardiac rhabdomyoma since 1982 were identified from MEDLINE. We evaluated the following risk factors associated with clinical impact and perinatal outcome: family history of TS, gestational age at diagnosis, tumor size, site and number of tumors, tumor progression, and associated intracardiac and extracardiac anomalies. RESULTS In this meta-analysis, 138 cases, including nine newly added by us, were categorized into Group A (107 live babies) and Group B (16 neonatal deaths and 15 intrauterine fetal deaths). Univariate analysis showed that large cardiac tumors (P < 0.0001), fetal dysrhythmia (P < 0.0001) and hydrops (P < 0.0001) were strong predictors of neonatal outcome. Tumor size >or= 20 mm (relative risk (RR), 20.6; 95% CI, 2.2-195.9; P = 0.009) and fetal dysrhythmia (RR, 13.6; 95% CI, 2.9-62.3; P = 0.001) were significantly associated with neonatal morbidity. TS, present in 85/133 (63.9%) cases, was significantly associated with multiple cardiac tumors (P < 0.0001) and family history of TS (P = 0.02). CONCLUSIONS Large tumor size and hydrops are significantly associated with poor neonatal outcome, whereas family history of TS and multiple fetal cardiac tumors are associated with TS. Any sonographic detection of a fetal cardiac tumor should warrant further investigation for the possible presence of associated disorders.
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Yu YH, Hsu WH, Hsu NY, Chang YC, Tsai PP, Tseng GC, Sun SS, Chiui YF. Comparison of two-phase (201)Tl SPECT with chest CT to differentiate thoracic malignancies from benign lesions. THE QUARTERLY JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING : OFFICIAL PUBLICATION OF THE ITALIAN ASSOCIATION OF NUCLEAR MEDICINE (AIMN) [AND] THE INTERNATIONAL ASSOCIATION OF RADIOPHARMACOLOGY (IAR), [AND] SECTION OF THE SOCIETY OF... 2008; 52:66-73. [PMID: 18235422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
AIM This study was conducted to compare the performance of (201)Tl single photon emission computed tomography ((201)Tl SPECT) with chest computed tomography (CT) in differentiating thoracic malignancies from benign lesions. METHODS One hundred and seventy patients with confirmed diagnostic thoracic lesions found in chest radiographs were prospectively examined by (201)Tl SPECT. The performance of (201)Tl SPECT in differentiating thoracic malignancies from benign lesions was evaluated in 161 patients with a measurable retention index (RI), using the region-of-interest method. Chest CT scans were retrospectively collected from 165 patients and were interpreted by two independent observers. RESULTS The areas under the receiver operating characteristics curves were 0.85 using the RI value to differentiate thoracic malignancies from benign lesions. The sensitivity, specificity, and accuracy were 71.9%, 83.1%, and 76.4%, respectively, with a cutoff level for the RI set at 20%. Similarly, the sensitivity, specificity and accuracy of chest CT scans to differentiate malignancies from benign lesions were 78.2%, 69.7% and 74.9%, respectively. Focusing on patients with concordant results in both (201)Tl SPECT and chest CT scans, we can differentiate thoracic malignancies from benign lesions with a sensitivity of 89.1%, a specificity of 90%, and an accuracy of 89.4%. CONCLUSION Both (201)Tl SPECT and chest CT scans are useful imaging tools in differentiating thoracic malignancies from benign lesions, with an accuracy of around 75%. By combining these two image modalities, the accuracy improves to 89.4%, which may circumvent the need for invasive procedures for certain equivocal cases, using either single image alone.
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Chen YH, Chang YC, Lin CH, Chung TY. Diode-pumped, actively internal-Q-switched Nd:MgO:PPLN laser. OPTICS EXPRESS 2008; 16:2048-2055. [PMID: 18542284 DOI: 10.1364/oe.16.002048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We demonstrated a laser-diode-pumped, electro-optically internal-Q-switched laser system radiating at 1.085 mum fabricated using a periodically poled Nd:MgO:LiNbO3 (Nd:MgO:PPLN) crystal. The Nd:MgO:PPLN is 17-mm long and has a 12-mm long, 13.6-mum period polarization-mode quasi-phase-matching (PM QPM) grating section functioning as the Q-switch of the laser system. When the Nd:MgO:PPLN Q-switch was driven by a 260-V voltage pulse train at 5 kHz, we obtained laser pulses of pulse energy >2.45 muJ and a pulse width of ~28 ns, corresponding to a laser peak power of ~88 W, from this internal-Q-switched laser system with 2% output coupling at an absorbed diode pump power of 0.61 W.
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Chang YC, Chu JY, Wang TJ, Lin MW, Yeh JT, Wang JK. Fourier analysis of surface plasmon waves launched from single nanohole and nanohole arrays: unraveling tip-induced effects. OPTICS EXPRESS 2008; 16:740-747. [PMID: 18542150 DOI: 10.1364/oe.16.000740] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The authors report the investigation of surface plasmon waves (SPW) generated by single nanohole and nanohole arrays. Scattering-type scanning near-field microscopy is used to directly observe near-field distribution. The images after Fourier transformation display characteristic patterns that match with the derived analytic formula. The correspondence helps to identify the role of the scanning tip in generating SPW, making possible of the removal of this tip-induced effect. This study provides a means to perform in-depth investigation on surface plasmon polaritons.
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Freeman LEB, Blair A, Ahonen EQ, Porthe V, Benavides FG, Benach J, Hazarika R, Baldi I, Lebailly P, Barrau M, Bouchart V, Lecluse Y, Garrigou A, Chang YC, Lu JL, Schmeisser N, Mester B, Ahrens W, Lebailly P, Niez E, Baldi I, Leveque N, Meyer C, Commitee A. Agriculture 2. Occup Environ Med 2007. [DOI: 10.1136/oem.64.12.e43] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Chang CK, Lin DZ, Chang YC, Lin MW, Yeh JT, Liu JM, Yeh CS, Lee CK. Enhancing intensity of emitted light from a ring by incorporating a circular groove. OPTICS EXPRESS 2007; 15:15029-15034. [PMID: 19550784 DOI: 10.1364/oe.15.015029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We fabricated a ring containing a single circular groove (RCG) on silver film and which was supported on a glass substrate. We found that by changing the mean radius of the circular groove, the light intensity emitted from the RCG can be modulated by using the scattering light from the circular groove. In addition, we also fabricated circular grooves with the same depth but of different widths so that we could examine the scattering light behavior of the grooves. Herein, we propose a theoretical model which takes into account the amplitude modulation of the cylindrical waves. Our results showed that our proposed model agreed well with the experimental results.
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Chang YC, Pearn WL, Wu CW. On the Sampling Distributions of the Estimated Process Loss Indices with Asymmetric Tolerances. COMMUN STAT-SIMUL C 2007. [DOI: 10.1080/03610910701569168] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Hsieh CH, Leu YS, Chang YF, Tai HC, Huang MZ, Hsiao HT, Chang YC, Chen YJ. The role of intensity modulated radiation therapy for locally advanced hypopharyngeal cancer after resection and ileocolic free flap reconstruction. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.16521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
16521 Background: To estimate the toxicity/efficacy of concurrent chemoradiation therapy (CCRT) and with different modalities for locally advanced hypopharyngeal carcinoma post ileocolic free flap reconstruction (ICFR). Methods: Between April 2003 and December 2006, 15 patients had enrolled and a total of 13 patients were treated for locally advanced hypopharyeal cancer after resection and ICFR. The majority in group was stage IVa and all were squamous cell histology. Five were treated with intensity modulated radiation therapy (IMRT)/chemotherapy (CT) and 8 were treated with the conventional radiotherapy (CRT)/CT, both to a median dose of 64.8 Gy. Two to three cycles of CT given concurrent with RT every 3 or 4 weeks of cisplatin, 15 mg/m2 i.v., D1–5, plus 5-FU, 750 mg/m2 continue infusion, D1–5. Two same regiment of CT had applied monthly after CCRT one month latter for all. Results: The mean survival was 33 months (range, 6–42 months). Two-year actuarial overall survival (OS), disease-free (DFS), locoregional progression-free (LRPF) and distant- metastases-free (DMF) rates of all were 74%, 67%, 83%, 83%, respectively. Comparing the IMRT and CRT group, two-year OS, DFS, LRP and DM rates were 67% vs. 62%, 75% vs. 63%, 75% vs. 87%, 100% vs. 75%, respectively. Except OS rate (p = 0.04), others were not statistically significant. In IMRT group, one left side lower neck failure was noted. In CRT group, one over flap and the other over level III of neck recurrent was noted. Speech ability above 70% in IMRT vs. CRT group were 4/5 (80%) vs. 4/8 (50%). Swallowing with solid diet in IMRT vs. CRT group were 3/5 (60%) vs.3/8 (37.5%). Grade III of dermatitis and mucositis for IMRT vs. CRT group were 40% vs. 100% and 20% vs. 87.5%. The median duration of post surgery to start CCRT and of CCRT were 33 days and 54 days. The interval from post-operation to start CCRT and of CCRT longer than median time would influence LRPF rate (p = 0.05). Conclusions: For locally advanced hypopharyngeal carcinoma post ICFR, IMRT results in lower toxicity, better speech, swallowing ability and superior treatment outcomes when compared with the CRT group. Prolong starting CCRT and extend CCRT time influence LRPF rate. No significant financial relationships to disclose.
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