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Chen JS, Wang ST, Mei Q, Sun T, Hu JT, Xiao GS, Chen H, Xuan YH. The role of CBL-CIPK signaling in plant responses to biotic and abiotic stresses. Plant Mol Biol 2024; 114:53. [PMID: 38714550 DOI: 10.1007/s11103-024-01417-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 01/06/2024] [Indexed: 05/10/2024]
Abstract
Plants have a variety of regulatory mechanisms to perceive, transduce, and respond to biotic and abiotic stress. One such mechanism is the calcium-sensing CBL-CIPK system responsible for the sensing of specific stressors, such as drought or pathogens. CBLs perceive and bind Calcium (Ca2+) in response to stress and then interact with CIPKs to form an activated complex. This leads to the phosphorylation of downstream targets, including transporters and ion channels, and modulates transcription factor levels and the consequent levels of stress-associated genes. This review describes the mechanisms underlying the response of the CBL-CIPK pathway to biotic and abiotic stresses, including regulating ion transport channels, coordinating plant hormone signal transduction, and pathways related to ROS signaling. Investigation of the function of the CBL-CIPK pathway is important for understanding plant stress tolerance and provides a promising avenue for molecular breeding.
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Affiliation(s)
- J S Chen
- College of Biology and Food Engineering, Chongqing Three Gorges University, Wanzhou, 404100, China
| | - S T Wang
- College of Plant Protection, Shenyang Agricultural University, Shenyang, 110866, China
| | - Q Mei
- College of Plant Protection, Shenyang Agricultural University, Shenyang, 110866, China
| | - T Sun
- Chongqing Customs Technology Center, Chongqing, 400020, China
| | - J T Hu
- College of Biology and Food Engineering, Chongqing Three Gorges University, Wanzhou, 404100, China
| | - G S Xiao
- College of Biology and Food Engineering, Chongqing Three Gorges University, Wanzhou, 404100, China.
| | - H Chen
- College of Life Science, Northeast Forestry University, Harbin, 150040, China.
| | - Y H Xuan
- State Key Laboratory of Elemento-Organic Chemistry and Department of Plant Protection, National Pesticide Engineering Research Center (Tianjin), Nankai University, Tianjin, 300071, China.
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Chen M, Xu MY, Liu Y, Lin XJ, Xu JK, Wang ST, Xu AQ, Tao ZX. [Analysis of the complete genome characterization of 11 human astrovirus strains in Shandong Province]. Zhonghua Yu Fang Yi Xue Za Zhi 2024; 58:40-47. [PMID: 38228548 DOI: 10.3760/cma.j.cn112150-20230509-00357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
Objective: To study the complete genome characterization of Human Astrovirus (HAstV) in Shandong Province. Methods: Stool samples from acute flaccid paralysis (AFP) surveillance in Shandong Province from 2020 to 2022 were collected, and HAstV nucleic acid was examined by real-time quantitative PCR (qPCR). Next-generation sequencing (NGS) was conducted for the positive samples to obtain complete genome sequences and identify the genotype. Homology comparison and phylogenetic analysis were performed by using BioEdit and Mega software. Results: A total of 667 samples were examined by qPCR, of which 14 were HAstV-positive (2.1%), including HAstV-1 (n=6), MLB1 (n=6), MLB2 (n=1), and VA2 (n=1). The complete genome sequences were obtained from 11 samples. The six HAstV-1 sequences of this study had 98.2% to 99.9% nt similarities with each other and 87.6% to 98.6% with those from other regions. The four MLB1 sequences of this study had 99.1% to 99.9% nt similarities with each other and 92.2% to 99.4% with those from other regions. The VA2 sequence of this study had 96.0% to 96.3% nt similarities with those from other regions. Phylogenetic analysis based on ORF2 region showed that the local HAstV-1 sequences were most closely related to Japanese strains, and had distinct topology with phylogenies based on ORF1a and ORF1b regions. Conclusion: The complete genome sequences of 11 HAstV strains are obtained, and the VA2 complete genome is found.
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Affiliation(s)
- M Chen
- Division of EPI, Shandong Center for Disease Control and Prevention, Jinan 250014, China
| | - M Y Xu
- Clinical Laboratory, Shandong Academy of Occupational Health and Occupational Medicine, Jinan 250062, China
| | - Y Liu
- Division of EPI, Shandong Center for Disease Control and Prevention, Jinan 250014, China
| | - X J Lin
- Division of EPI, Shandong Center for Disease Control and Prevention, Jinan 250014, China
| | - J K Xu
- Division of EPI, Shandong Center for Disease Control and Prevention, Jinan 250014, China
| | - S T Wang
- Division of EPI, Shandong Center for Disease Control and Prevention, Jinan 250014, China
| | - A Q Xu
- Division of EPI, Shandong Center for Disease Control and Prevention, Jinan 250014, China
| | - Z X Tao
- Division of EPI, Shandong Center for Disease Control and Prevention, Jinan 250014, China
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3
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Zhang HQ, Wang ST, Sun Z, Lin GL, Wu B, Niu BZ, Lu JY, Xu L, Xiao Y. [Analysis of influencing factors and clinical value of anterior peritoneal reflection for patients with rectal cancer]. Zhonghua Wai Ke Za Zhi 2023; 61:788-794. [PMID: 37491172 DOI: 10.3760/cma.j.cn112139-20230408-00149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 07/27/2023]
Abstract
Objectives: To investigate the factors influencing the height of anterior peritoneal reflection (APR) for patients with rectal cancer, and to analyze the relationship between the APR and the lateral lymph node metastasis. Methods: Clinical data of 432 patients with tumor located within and below APR were retrospectively collected from the rectal cancer database at the Department of General Surgery, Peking Union Medical College Hospital from August 2020 to September 2022. Ninty-eight non-rectal cancer patients were also enrolled as a control group. There were 308 males and 124 females in the tumor group, aged (M(IQR)) 62 (16) years (range: 24 to 85 years) and 53 males and 45 females in the control group, aged 60 (22) years (range: 27 to 87 years). The APR height, pelvis, and tumor-related parameters were measured by MRI. A multifactor linear regression model was established to analyze the dependent correlation factors of APR height. These factors of the two groups were matched by propensity score matching and their APR heights were compared after matching. An ordinal Logistic regression model was established to explore the relationship between APR-related parameters and radiographic lateral lymph node metastasis. Results: The APR height of the tumor group was (98.7±14.4) mm (range: 43.3 to 154.0 mm) and the control group was (95.1±12.7) mm (range: 68.0 to 137.9 mm). Multivariable linear regression revealed that the greater the weight (B=0.519, 95%CI: 0.399 to 0.640, P<0.01), the anterior pelvic depth (B=0.109, 95%CI: 0.005 to 0.213, P=0.039) and the smaller the bi-ischial diameter (B=-0.172, 95%CI:-0.294 to -0.049, P=0.006), the higher the APR height. The tumor group had a higher APR height than the control group after propensity score matching ((98.3±14.2) mm vs. (95.1±12.7) mm, t=-1.992, P=0.047). Ordinal Logistic regression indicated that the longer segment of the tumor invade the nonperitoneal rectum was an independent influencing factor of radiographic lateral lymph node metastasis (OR=1.016, 95%CI: 1.002 to 1.030, P=0.021), while the distance between the anal verge and the tumor was not (OR=0.986, 95%CI: 0.972 to 1.000, P=0.058). Conclusions: The higher the weight, the deeper and narrower the pelvis, the higher the APR height. There is a certain relationship between APR and lateral lymph node metastasis on imaging.
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Affiliation(s)
- H Q Zhang
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - S T Wang
- Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Z Sun
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - G L Lin
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - B Wu
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - B Z Niu
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - J Y Lu
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - L Xu
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Y Xiao
- Department of General Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
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Xia BL, Wang ST, Yin JJ, Zhang WY, Yang N, Liu Q, Wu HJ. [Simultaneous determination of 43 antibacterials from nine categories in water using automatic sample loading-solid phase extraction-ultra performance liquid chromatography-tandem mass spectrometry]. Se Pu 2023; 41:591-601. [PMID: 37387280 DOI: 10.3724/sp.j.1123.2022.09008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/01/2023] Open
Abstract
Antibacterials represent a pharmaceutical class that is extensively used and consumed worldwide. The presence of a large number of antibacterial agents in water could result in antibiotic resistance. Thus, the development of a fast, accurate, and high-throughput method to analyze these emerging contaminants in water is necessary. Herein, a method was developed to achieve the simultaneous determination of 43 antibacterials from nine pharmaceutical categories (i.e., sulfonamides, quinolones, fluoroquinolones, tetracyclines, lincosamides, macrolides, nitroimidazoles, diterpenes, and dihydrofolate reductase inhibitors) in water using automatic sample loading-solid phase extraction (SPE)-ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). Because the properties of these 43 antibacterials are quite different, the main objective of this work is to develop an extraction procedure that would enable the simultaneous analysis of a wide range of multiclass antibacterials. Given this context, the work presented in this paper optimized the SPE cartridge type, pH, and sample loading amount. Multiresidue extraction was performed as follows. The water samples were filtered through 0.45 μm filter membranes, added with Na2EDTA and NaH2PO4, and pH-adjusted to 2.34 using H3PO4. The solutions were then mixed with the internal standards. An automatic sample loading device fabricated by the authors was used for sample loading, and Oasis HLB cartridges were used for enrichment and purification. The optimized UPLC conditions were as follows: chromatographic column, Waters Acquity UPLC BEH C18 column (50 mm×2.1 mm, 1.7 μm); mobile phases, methanol-acetonitrile (2∶8, v/v) solution containing 0.1% formic acid and 0.1% formic acid aqueous solution; flow rate, 0.3 mL/min; injection volume, 10 μL. The compounds were step scanned using an electrospray ionization source in the positive and multiple-reaction monitoring (MRM) modes, and analyzed by internal and external standard methods. The results showed that the 43 compounds achieved high linearity in their respective linear ranges, with correlation coefficients (r2) greater than 0.996. The limits of detection (LODs) of the 43 antibacterial agents ranged from 0.004 ng/L to 1.000 ng/L, and their limits of quantification (LOQs) ranged from 0.012 ng/L to 3.000 ng/L. The average recoveries ranged from 53.7% to 130.4%, and the relative standard deviations (RSDs) were between 0.9% and 13.2%. The method was successfully applied to the determination of six tap water samples from different districts and six water samples obtained from the Jiangyin section of the Yangtze River and Xicheng Canal. No antibacterial compound was detected in any of the tap water samples, but a total of 20 antibacterial compounds were detected in the river and canal water samples. Among these compounds, sulfamethoxazole showed the highest mass concentrations, ranging from 8.92 to 11.03 ng/L. The types and contents of antibacterials detected in the Xicheng Canal were greater than those found in the Yangtze River, and two kinds of diterpenes, namely tiamulin and valnemulin, were found easily and commonly in water sample. The findings indicate that antibacterial agents are widespread in environmental waters. The developed method is accurate, sensitive, rapid, and suitable for the detection of the 43 antibacterial compounds in water samples.
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Affiliation(s)
- Bao-Lin Xia
- Testing Center of Jiangyin Food Safety, Jiangyin 214400, China
| | - Shi-Tao Wang
- Testing Center of Jiangyin Food Safety, Jiangyin 214400, China
| | - Jing-Jing Yin
- Testing Center of Jiangyin Food Safety, Jiangyin 214400, China
| | - Wei-Yi Zhang
- Testing Center of Jiangyin Food Safety, Jiangyin 214400, China
| | - Na Yang
- Testing Center of Jiangyin Food Safety, Jiangyin 214400, China
| | - Qiang Liu
- College of Food Science and Engineering, Nanjing University of Finance and Economics, Nanjing 210023, China
| | - Hai-Jing Wu
- Nanjing Institute for Food and Drug Control, Nanjing 211198, China
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Wang ST, Bao TRG, Qi PK, Liu T. Three new lanostane-type triterpenes from the epidermis of Wolfiporia cocos. Nat Prod Res 2023:1-7. [PMID: 37165599 DOI: 10.1080/14786419.2023.2210737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Wolfiporia cocos is commonly used as a traditional Chinese medicine for its diuretic, tonifying, and invigorating effects on the spleen. However, the epidermis of W. cocos is discarded as scrap during harvesting because of its low price, resulting in a great waste of resources and environmental pollution. In this work, the epidermis of W. cocos was studied and three new lanostane triterpenoids were isolated. The structures were determined using NMR and HRESIMS, with absolute configurations established by comparison of the calculated and experimental ECD spectra. The three new compounds were evaluated for their antimicrobial activities in vitro against Staphylococcus aureus, Escherichia coli, and Saccharomyces cerevisiae. None of the tested compounds showed inhibition against these three strains of indicator microbes at a concentration of 128 μg/ml. This study provides a reference for further medicinal development and the utilization of the epidermis of W. cocos.
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Affiliation(s)
- Shi-Tao Wang
- Department of Natural Products Chemistry, School of Pharmacy, China Medical University, Shenyang, People's Republic of China
| | - Te-Ri-Gen Bao
- Teaching and Research Department of Chinese Materia Medica Resources, College of Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, People's Republic of China
| | - Peng-Kun Qi
- Department of Orthopaedics, Affiliated Hospital of Liaoning University of Traditional Chinese Medicine, Shenyang, People's Republic of China
| | - Tao Liu
- Department of Natural Products Chemistry, School of Pharmacy, China Medical University, Shenyang, People's Republic of China
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Zhang JQ, Li YY, Zhang XY, Tian ZH, Liu C, Wang ST, Zhang FR. Cellular senescence of renal tubular epithelial cells in renal fibrosis. Front Endocrinol (Lausanne) 2023; 14:1085605. [PMID: 36926022 PMCID: PMC10011622 DOI: 10.3389/fendo.2023.1085605] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 02/14/2023] [Indexed: 03/08/2023] Open
Abstract
Renal fibrosis (RF) is the common pathological manifestation of virtually all chronic kidney diseases (CKD) and one of the major causes of end-stage renal disease (ESRD), but the pathogenesis of which is still unclear. Renal tubulointerstitial lesions have been identified as a key pathological hallmark of RF pathology. Renal tubular epithelial cells are the resident cells of the tubulointerstitium and play an important role in kidney recovery versus renal fibrosis following injury. Studies in recent years have shown that senescence of renal tubular epithelial cells can accelerate the progression of renal fibrosis. Oxidative stress(OS), telomere attrition and DNA damage are the major causes of renal tubular epithelial cell senescence. Current interventions and therapeutic strategies for cellular senescence include calorie restriction and routine exercise, Klotho, senolytics, senostatics, and other related drugs. This paper provides an overview of the mechanisms and the key signaling pathways including Wnt/β-catenin/RAS, Nrf2/ARE and STAT-3/NF-κB pathway involved in renal tubular epithelial cell senescence in RF and therapies targeting renal tubular epithelial cell senescence future therapeutic potential for RF patients. These findings may offer promise for the further treatment of RF and CKD.
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Affiliation(s)
- Jun-Qing Zhang
- College of Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Ying-Ying Li
- College of First Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Xue-Yan Zhang
- College of First Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Zeng-Hui Tian
- College of First Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Cheng Liu
- College of First Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Shi-Tao Wang
- College of First Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Fa-Rong Zhang
- Department of Nephrology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
- *Correspondence: Fa-Rong Zhang,
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7
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Chen M, Wang ST, Liu Y, Xiong P, Tao ZX, Zhang L, Jia JL, Wang CY, Xu S. [Genetic characteristics of varicella zoster virus in Shandong province from 2020 to 2021]. Zhonghua Yu Fang Yi Xue Za Zhi 2022; 56:1080-1086. [PMID: 35922235 DOI: 10.3760/cma.j.cn112150-20220105-00017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To investigate the genetic characteristics of varicella zoster virus (VZV) in Shandong province from 2020 to 2021. Methods: From April 2020 to December 2021, 85 herpes fluid samples from suspected varicella patients in Shandong province were collected. The qPCR was used to detect viral DNA and screen suspected samples. Six single nucleotide polymorphisms (SNPs) of ORF22 fragment and ORF38 fragment in positive samples were examined via PCR and Sanger sequencing to identify the viral genotypes. Four SNPs of ORF38 and ORF62 were examined to identify the vaccine and wild-type strains. The sequences were analyzed with Sequencher and MEGA7 software, using the VZV reference strain sequences from GenBank. Results: In the 85 samples suspected of varicella, 80 were VZV positive and wild-type strains belonging to Clade 2. Compared with clade 2 representative strains, the nucleotide and amino acid similarities of ORF22 fragment were 99.5%-100% and 98.5%-100%, respectively. SD20-1, SD20-5, SD20-6, SD20-8, SD20-9, SD20-10, SD20-11, SD20-12, SD20-13, SD20-30 and SD20-31 had a A➝G nucleotide mutation at 37990, causing amino acid change from glutamine to arginine. SD21-1 had a C➝A nucleotide mutation at 38059, causing threonine to asparagine during coding. Conclusions: From 2020 to 2021, all VZV strains in Shandong province are the wild-type strains belonging to Clade 2.
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Affiliation(s)
- M Chen
- Division of EPI, Shandong Center for Disease Control and Prevention, Jinan 250014, China Shandong Qidu Pharmaceutical Co. Ltd./Shandong Provincial Key Laboratory of Neuroprotective Drugs, Zibo 255400, China
| | - S T Wang
- Division of EPI, Shandong Center for Disease Control and Prevention, Jinan 250014, China
| | - Y Liu
- Division of EPI, Shandong Center for Disease Control and Prevention, Jinan 250014, China
| | - P Xiong
- Division of EPI, Shandong Center for Disease Control and Prevention, Jinan 250014, China
| | - Z X Tao
- Division of EPI, Shandong Center for Disease Control and Prevention, Jinan 250014, China
| | - L Zhang
- Division of EPI, Shandong Center for Disease Control and Prevention, Jinan 250014, China
| | - J L Jia
- Liaocheng Center for Disease Control and Prevention, Liaocheng 252000, China
| | - C Y Wang
- Division of EPI, Shandong Center for Disease Control and Prevention, Jinan 250014, China
| | - Songtao Xu
- National Institute for Viral Disease Control and Prevention, China Center for Disease Control and Prevention, Beijing 102206, China
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Wu HR, Li L, Ma YN, Liu CL, Pei P, Zheng XF, Wang ST, Xiao Y, Bu DF, Xu YF, Pan H, Qi Y. [The diagnostic value of chromosome microarray analysis technique in the genetic causes of children with intellectual disability or global developmental delay]. Zhonghua Yi Xue Za Zhi 2021; 101:224-228. [PMID: 33455150 DOI: 10.3760/cma.j.cn112137-20200422-01275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To study the value of chromosome microarray analysis (CMA) application in children with developmental delay (DD), intellectual disability (ID), autistic spectrum disorder (ASD) and multiple congenital anomalies (MCA). Methods: Genomic DNA was extracted from peripheral blood samples. Array-based comparative genomic hybridization (array-CGH) analysis and single nucleotide polymorphism array (SNP-array) were performed in 1 320 children with DD/ID, ASD, with or without epilepsy and MCA who were admitted to Peking University First Hospital from 2014 to 2019. The results of genetic etiology test of CMA in children with mental retardation or global DD was summarized. Results: Of 1 320 samples, there were 10 cases of aneuploid abnormality, 6 cases of uniparental disomy and one case of mosaicism, respectively. Pathogenic copy number variations (CNVs) were found in 320 cases and pathogenic CNVs were detected in 23 cases, with a combined detection rate of 26% (343/1 320). CNVs of uncertain clinical significance occurred in 107 cases, accounting for 8.1% (107/1 320). There were 25 cases of possible benign CNVs, accounting for 2% (25/1 320), while benign CNVs were reported in 20 cases, accounting for 1.5% (20/1 320). The detection rate of MCA with DD/ID was 39.8% (130/327). Conclusions: CMA has the advantages of high resolution and covering the whole genome. It can detect the chromosomal abnormalities, microdeletions and duplications seen under the microscope, thus the genetic etiology of children with mental retardation or global DD can be diagnosed.
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Affiliation(s)
- H R Wu
- Department of Central Laboratory, Peking University First Hospital, Beijing 100034, China
| | - L Li
- Department of Central Laboratory, Peking University First Hospital, Beijing 100034, China
| | - Y N Ma
- Department of Central Laboratory, Peking University First Hospital, Beijing 100034, China
| | - C L Liu
- Department of Central Laboratory, Peking University First Hospital, Beijing 100034, China
| | - P Pei
- Department of Central Laboratory, Peking University First Hospital, Beijing 100034, China
| | - X F Zheng
- Department of Central Laboratory, Peking University First Hospital, Beijing 100034, China
| | - S T Wang
- Department of Central Laboratory, Peking University First Hospital, Beijing 100034, China
| | - Y Xiao
- Department of Central Laboratory, Peking University First Hospital, Beijing 100034, China
| | - D F Bu
- Department of Central Laboratory, Peking University First Hospital, Beijing 100034, China
| | - Y F Xu
- Department of Central Laboratory, Peking University First Hospital, Beijing 100034, China
| | - H Pan
- Department of Central Laboratory, Peking University First Hospital, Beijing 100034, China
| | - Y Qi
- Department of Central Laboratory, Peking University First Hospital, Beijing 100034, China
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Wang ST, Xu KF. [Advance in diagnosis and treatment of pulmonary embolism during pregnancy]. Zhonghua Jie He He Hu Xi Za Zhi 2021; 44:49-53. [PMID: 33412624 DOI: 10.3760/cma.j.cn112147-20200303-00231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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10
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Xu J, Cheng YJ, Wang ST, Wang X, Jin ZY, Qian TY, Zhu JX, Nickel MD, Xue HD. Simultaneous multi-slice accelerated diffusion-weighted imaging with higher spatial resolution for patients with liver metastases from neuroendocrine tumours. Clin Radiol 2020; 76:81.e11-81.e19. [PMID: 32962807 DOI: 10.1016/j.crad.2020.08.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 08/20/2020] [Indexed: 12/19/2022]
Abstract
AIM To evaluate the imaging characteristics of simultaneous multi-slice (SMS) accelerated diffusion-weighted imaging (DWI) with decreased section thickness, with and without motion correction, in comparison to conventional DWI (cDWI) for the detection of lesions in patients with neuroendocrine tumour (NET) liver metastases. MATERIALS AND METHODS Fifteen patients with NET liver metastases underwent cDWI (section thickness [SL]=4 mm) and SMS-DWI (SL=2 mm). Non-linear motion-corrected (Moco)-SMS-DWI was generated in addition to the original series. Qualitative imaging characteristics (five-point Likert scale), the number of high signal lesions, and the detectability and delineation of lesions were evaluated and compared using the Friedman and the Dunn-Bonferroni tests. The test-retest variability (TRV) of the cDWI and SMS-DWI techniques was investigated among 11 healthy volunteers who underwent cDWI (SL=4 mm) and SMS-DWI (SL=4 mm) twice. The Friedman and the Dunn-Bonferroni post-hoc tests were used to compare the mean apparent diffusion coefficient (ADC) and the TRV in different liver regions between the three series. RESULTS Moco-SMS-DWI demonstrated significantly superior overall image quality (p<0.001) with significantly fewer artefacts (p=0.003) than cDWI. The number of lesions detected by cDWI, SMS-DWI, and Moco-SMS-DWI were 348, 504, and 523, respectively. The detectability and delineation of the lesions and the ADC values were significantly higher on the SMS-DWI and Moco-SMS-DWI images than on the cDWI images (all p<0.001). Moco-SMS-DWI showed significantly higher TRV than cDWI in regions near the liver edge (p=0.018). CONCLUSIONS SMS-DWI achieves higher spatial resolution than cDWI within the same acquisition time, detects more lesions, and provides better lesion delineation. By applying motion correction, the TRV of DWI could be enhanced in regions near the liver edge.
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Affiliation(s)
- J Xu
- Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Y J Cheng
- Department of Oncology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - S T Wang
- Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - X Wang
- Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
| | - Z Y Jin
- Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
| | - T Y Qian
- MR Collaboration, Siemens Healthcare Ltd, Beijing, China
| | - J X Zhu
- MR Collaboration, Siemens Healthcare Ltd, Beijing, China
| | - M D Nickel
- Siemens Healthcare GmbH, Erlangen, Germany
| | - H D Xue
- Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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Abstract
Abstract
In this simple, quick procedure for determining copper in human serum and urine, the serum and urine specimens were analyzed directly after dilution with a solution of HNO3 and Triton X-100, 1 mL/L each. We calibrated with aqueous standards for quantitation in Zeeman background atomic absorption spectrometry. By modifying the drying and pyrolysis stages of the graphite furnace atomic absorption spectrometer, we reduced the analytical time to 30 s per determination. The within-run imprecision (CV) is 2.6% and 3.4% and the between-run imprecision is 0.9% and 2.5% for serum and urine copper at concentrations of 30.4 and 2.70 mumol/L, respectively. The accuracy of this fast method was verified by analyzing the National Institute of Standards and Technology Standard Reference Materials SRM 1598 bovine serum and SRM 2670 urine (agreement with certified values within 0.1 mumol/L for serum and within 0.02 mumol/L for urine), by analytical recovery studies (98% recovered in serum, 100% recovered in urine), and by comparison with our normal routine method. We also used the Quebec Interlaboratory Comparison Program to validate the analytical performance. From the precision and accuracy studies, we conclude that this fast-furnace program is a rapid, simple, and reliable method for determining copper in serum and urine.
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Affiliation(s)
- S T Wang
- Chemistry Section, Ontario Ministry of Health, Etobicoke, Canada
| | - H P Demshar
- Chemistry Section, Ontario Ministry of Health, Etobicoke, Canada
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Lin XJ, Liu GF, Wang M, Tao ZX, Wang ST, Song LZ, Zhang L, Xu AQ. [Etiologic surveillance and analysis of acute meningitis and encephalitis syndrome in Jinan city in 2013-2016]. Zhonghua Yu Fang Yi Xue Za Zhi 2019; 53:174-178. [PMID: 30744292 DOI: 10.3760/cma.j.issn.0253-9624.2019.02.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To characterize the etiology and epidemiological characteristics of the acute meningitis and encephalitis syndrome (AMES) in Jinan city in 2013-2016. Methods: The epidemiological data, clinical diagnosis, serum and cerebrospinal fluid (CSF) specimens were collected from 3 577 AMES cases in 6 sentinel hospitals in Jinan city in 2013-2016. Samples of all cases were made sero-diagnosis for Immunoglobulin (Ig) M antibody to Japanese encephalitis virus (JEV) and negative cases of JEV for enterovirus (EV), mumps virus (MuV) and herpes simplex virus (HSV) by enzyme-linked immunosorbent assay (ELISA). Virus isolation and molecular identification were performed. Positive rates were analyzed by Chi-square test. Results: In 2013-2016, the positive rates of JEV, EV, MuV and HSV were 9.0% (322/3 577 cases), 22.1% (643/2 916 cases), 9.9% (289/2 916 cases), 26.9% (783/2 916), respectively. Of these, the positive rates of JEV were 32.9% (261/794), 1.2% (14/1 175), 1.0% (8/807) and 4.9% (39/801 cases); EV: 19.5% (91/466), 35.1% (342/974 cases), 15.5% (115/743) and 13.0% (95/733); MuV: 9.2% (43/466), 14.4% (140/974), 9.0% (67/743) and 5.3% (39/733). HSV: 35.4% (165/466), 38.5% (375/974), 25.7% (191/743) and 7.1% (52/733). There were significant differences in positive rates of 4 kinds of viruses in 2013-2016 (P<0.001). A total of 81 EV strains belonging to 8 serotypes were isolated from 1 020 CSF specimens. The positive rates were 4.8% (6 cases), 13.1% (55 cases), 4.1% (7 cases) and 4.2% (13 cases) from 2013 to 2016. Coxsackievirus (CV) B5, echovirus (E) 6 and E30 accounted for 46% (37 isolates), 22% (18 isolates) and 21% (17 isolates) of all strains. Conclusion: The AMES cases in Jinan city in 2013-2016 were mainly caused by HSV, EV, MuV, JEV. CVB5, E6 and E30 were the dominant serotypes of EV associated with AMES cases in Jinan city.
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Affiliation(s)
- X J Lin
- Division of Expanded Immunization Program, Shandong Center for Disease Control and Prevention; Academy of Preventive Medicine, Shandong University; Shandong Provincial Key Laboratory of Infectious Disease Control and Prevention, Jinan 250014, China
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13
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Wang ST, Liu LB, Li XM, Wang YF, Xie PJ, Li Q, Wang R, Wei Q, Kang YH, Meng R, Feng XH. Circ-ITCH regulates triple-negative breast cancer progression through the Wnt/β-catenin pathway. Neoplasma 2018; 66:232-239. [PMID: 30509108 DOI: 10.4149/neo_2018_180710n460] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Accepted: 09/12/2018] [Indexed: 11/08/2022]
Abstract
Recent studies indicate that circular RNA (circRNA) is involved in tumorigenesis, but its role in triple-negative breast cancer (TNBC) remains largely unknown. In this study, we characterized the role of circ-ITCH in TNBC and found that circ-ITCH was significantly down-regulated in TNBC tissues and cell lines and closely associated with poor prognosis. We therefore constructed the MDA-MB-231 and BT-549 TNBC cell lines stably expressing circ-ITCH by lentiviral vectors to determine its underlying mechanisms in TNBC progression. Most importantly, over-expression of circ-ITCH remarkably inhibited TNBC proliferation, invasion and metastasis both in vitro and in vivo. Mechanistically, we found that circ-ITCH acts as a sponge for miR-214 and miR-17 to increase expression of its ITCH linear isoform, thereby inactivating Wnt/β-catenin signaling. Our combined results show for the first time that circ-ITCH is a tumor suppressor, a promising prognostic biomarker in TNBC and that its restoration could well be a successful strategy in TNBC.
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Affiliation(s)
- S T Wang
- Department of Clinical Medicine, School of Medicine, Peihua University, Xi'an, China
| | - L B Liu
- Department of Clinical Medicine, School of Medicine, Peihua University, Xi'an, China
| | - X M Li
- Department of Clinical Medicine, School of Medicine, Peihua University, Xi'an, China
| | - Y F Wang
- Department of Clinical Medicine, School of Medicine, Peihua University, Xi'an, China
| | - P J Xie
- Department of Internal Medicine, The First Affiliated Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Q Li
- Department of Clinical Medicine, School of Medicine, Peihua University, Xi'an, China
| | - R Wang
- Department of Clinical Medicine, School of Medicine, Peihua University, Xi'an, China
| | - Q Wei
- Department of Clinical Medicine, School of Medicine, Peihua University, Xi'an, China
| | - Y H Kang
- Department of Clinical Medicine, School of Medicine, Peihua University, Xi'an, China
| | - R Meng
- Department of Clinical Medicine, School of Medicine, Peihua University, Xi'an, China
| | - X H Feng
- Department of Clinical Medicine, School of Medicine, Peihua University, Xi'an, China
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Wu YP, Chen SH, Wang ST, Li XD, Cai H, Lin YZ, Xue XY, Wei Y, Zheng QS, Xu N. Prognostic values of clinicopathological characteristics and survival outcomes in prostate infiltrating ductal carcinoma: a population-based study. Oncotarget 2018; 8:29048-29055. [PMID: 28423709 PMCID: PMC5438711 DOI: 10.18632/oncotarget.16070] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 02/20/2017] [Indexed: 11/25/2022] Open
Abstract
Infiltrating ductal carcinoma (IDC) is a rare histologic subtype of prostate cancer. We investigated the clinicopathological features and prognosis of IDC compared with acinar cell carcinoma (ACC). We identified 3814 men diagnosed with prostate cancer between 2004 to and 2013 in the Surveillance, Epidemiology, and End Results database, including 511 IDC and 3303 ACC cases. Prostate cancer-specific survival (PCSS) was compared using univariate and multivariate Cox proportional hazards models. Generally, IDC occurred in older men (≥ 65 years old) and presented with larger sizes, and higher grades, American Joint Committee on Cancer (AJCC) stages, AJCC T stages, lymph node positive rates and metastasis rates. Men with IDC were less likely to undergo radical prostatectomy, but more likely to be treated with adjuvant radiation than men with ACC. Five-year PCSS rates were significantly worse in IDC. In the multivariate analysis, patients with ACC had a better PCSS than patients with IDC. In conclusion, IDC has unique clinicopathological characteristics and has worse prognosis than ACC. Multivariable Cox regression analysis showed that age over 85 years, higher grade and T stage, and metastasis at diagnosis were independent prognostic factors of worse survival outcomes, whereas radical prostatectomy was an independent prognostic factor of better survival outcomes.
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Affiliation(s)
- Yu-Peng Wu
- Department of Urology, First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China
| | - Shao-Hao Chen
- Department of Urology, First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China
| | - Shi-Tao Wang
- Department of Urology, First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China
| | - Xiao-Dong Li
- Department of Urology, First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China
| | - Hai Cai
- Department of Urology, First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China
| | - Yun-Zhi Lin
- Department of Urology, First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China
| | - Xue-Yi Xue
- Department of Urology, First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China
| | - Yong Wei
- Department of Urology, First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China
| | - Qing-Shui Zheng
- Department of Urology, First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China
| | - Ning Xu
- Department of Urology, First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China
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15
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Sun BH, Zhao JW, Zhang XH, Sheng LN, Sun ZY, Tanihata I, Terashima S, Zheng Y, Zhu LH, Duan LM, He LC, Hu RJ, Li GS, Lin WJ, Lin WP, Liu CY, Liu Z, Lu CG, Ma XW, Mao LJ, Tian Y, Wang F, Wang M, Wang ST, Xia JW, Xu XD, Xu HS, Xu ZG, Yang JC, Yin DY, Yuan YJ, Zhan WL, Zhang YH, Zhou XH. Towards the full realization of the RIBLL2 beam line at the HIRFL-CSR complex. Sci Bull (Beijing) 2018; 63:78-80. [PMID: 36658927 DOI: 10.1016/j.scib.2017.12.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 12/04/2017] [Accepted: 12/05/2017] [Indexed: 01/21/2023]
Affiliation(s)
- Bao-Hua Sun
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China; International Research Center for Nuclei and Particles in the Cosmos, Beijing 100191, China.
| | - Jian-Wei Zhao
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
| | - Xue-Heng Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Li-Na Sheng
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Zhi-Yu Sun
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Isao Tanihata
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China; International Research Center for Nuclei and Particles in the Cosmos, Beijing 100191, China
| | - Satoru Terashima
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China; International Research Center for Nuclei and Particles in the Cosmos, Beijing 100191, China
| | - Yong Zheng
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Li-Hua Zhu
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
| | - Li-Min Duan
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
| | - Liu-Chun He
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
| | - Rong-Jiang Hu
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
| | - Guang-Shuai Li
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
| | - Wen-Jian Lin
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
| | - Wei-Ping Lin
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Chuan-Ye Liu
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
| | - Zhong Liu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Chen-Gui Lu
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
| | - Xin-Wen Ma
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
| | - Li-Jun Mao
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
| | - Yi Tian
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
| | - Feng Wang
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
| | - Meng Wang
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
| | - Shi-Tao Wang
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
| | - Jia-Wen Xia
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Xiao-Dong Xu
- School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
| | - Hu-Shan Xu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Zhi-Guo Xu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Jian-Cheng Yang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Da-Yu Yin
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - You-Jin Yuan
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Wen-Long Zhan
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Yu-Hu Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Xiao-Hong Zhou
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
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16
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Wu YP, Xu N, Wang ST, Chen SH, Lin YZ, Li XD, Zheng QS, Wei Y, Xue XY. The efficacy and feasibility of total reconstruction versus nontotal reconstruction of the pelvic floor on short-term and long-term urinary continence rates after radical prostatectomy: a meta-analysis. World J Surg Oncol 2017; 15:228. [PMID: 29262863 PMCID: PMC5738806 DOI: 10.1186/s12957-017-1296-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2017] [Accepted: 12/08/2017] [Indexed: 11/30/2022] Open
Abstract
Background Recently, total pelvic floor reconstruction (TR) has been the treatment of choice for improving urinary incontinence (UI) after radical prostatectomy (RP). However, the superiority of TR with respect to urinary continence recovery following RP remains controversial. This study identified the effect of TR versus nonTR of the pelvic floor on short-term and long-term continence rates after RP. Methods A literature search was performed in November 2017 using the PubMed, Embase, and Web of Science databases. Only comparative research or clinical studies reporting urinary continence outcomes was included in the meta-analysis, and the quality of evidence was evaluated using the 2011 Level of Evidence for therapy research. Results We analyzed ten studies reporting urinary continence rates after RP at one or more postoperative time points (1, 2, 4, 12, 24, and 52 weeks). TR was associated with significantly better urinary continence outcomes at 1 week (OR 2.76, 95% CI 1.58–4.84, P < 0.001), 2 weeks (OR 2.57, 95% CI 1.74–3.80, P < 0.001), 4 weeks (OR 2.61, 95% CI 1.56–4.38, P < 0.001), 12 weeks (OR 4.33, 95% CI 2.01–9.33, P < 0.001), 24 weeks (OR 3.83, 95% CI 1.54–9.55, P = 0.004), 52 weeks (OR 4.10, 95% CI 1.80–9.38, P < 0.001) after RP. There was no difference in the rate of complications between the two arms (OR 0.54, 95% CI 0.19–1.54, P = 0.25). Conclusions Compared with nonTR, TR is significantly and positively associated with a return to continence but not with complication rate in men following RP, suggesting that TR may be useful for decreasing the urinary incontinence rate after surgery.
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Affiliation(s)
- Yu-Peng Wu
- Department of Urology, The First Affiliated Hospital of Fujian Medical University, 20 Chazhong Road, Fuzhou, 350005, China
| | - Ning Xu
- Department of Urology, The First Affiliated Hospital of Fujian Medical University, 20 Chazhong Road, Fuzhou, 350005, China
| | - Shi-Tao Wang
- Department of Urology, The First Affiliated Hospital of Fujian Medical University, 20 Chazhong Road, Fuzhou, 350005, China
| | - Shao-Hao Chen
- Department of Urology, The First Affiliated Hospital of Fujian Medical University, 20 Chazhong Road, Fuzhou, 350005, China
| | - Yun-Zhi Lin
- Department of Urology, The First Affiliated Hospital of Fujian Medical University, 20 Chazhong Road, Fuzhou, 350005, China
| | - Xiao-Dong Li
- Department of Urology, The First Affiliated Hospital of Fujian Medical University, 20 Chazhong Road, Fuzhou, 350005, China
| | - Qing-Shui Zheng
- Department of Urology, The First Affiliated Hospital of Fujian Medical University, 20 Chazhong Road, Fuzhou, 350005, China
| | - Yong Wei
- Department of Urology, The First Affiliated Hospital of Fujian Medical University, 20 Chazhong Road, Fuzhou, 350005, China
| | - Xue-Yi Xue
- Department of Urology, The First Affiliated Hospital of Fujian Medical University, 20 Chazhong Road, Fuzhou, 350005, China.
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Wang ST, Zhong DR, Sun XH. [The 453rd case: diarrhea, weight loss and diabetes mellitus]. Zhonghua Nei Ke Za Zhi 2016; 55:979-982. [PMID: 27916060 DOI: 10.3760/cma.j.issn.0578-1426.2016.12.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Chronic diarrhea is a common complaint in gastroentology department, which is classified into a variety of types. While as eosinophilic gastroenteritis is a rare cause. A 50-year-old male patient was admitted with a 2-year history of diarrhea worsened for 10 months. Fasting could alleviate the diarrhea. Laboratory findings demonstrated anemia, low vitamins and minerals, fat malabsorption and abnormal D-xylose absorption test, delayed gastric emptying. According to the endoscopic biopsy of gastrointestinal mucosa, the diagnosis of eosinophilic gastroenteritis was made. Diabetic neuropathy may aggravate the symptom. The diarrhea resolved after the administration of steroids.
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Affiliation(s)
| | | | - X H Sun
- Department of Gastroenterology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
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Zhu GH, Wang ST, Yao MZ, Cai JH, Chen CY, Yang ZX, Hong L, Yang SY. Screening of the residual normal ovarian tissue adjacent to orthotopic epithelial ovarian carcinomas in nude mice. Genet Mol Res 2014; 13:2978-86. [PMID: 24782132 DOI: 10.4238/2014.april.16.6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The objective of this study was to explore the feasibility and methods of screening the residual normal ovarian tissue adjacent to orthotopic ovarian carcinomas in nude mice. Human epithelial ovarian cancer cells (OVCAR3) were subcutaneously implanted for a tumor source and ovarian orthotopic transplantation. The cancer tissue, proximal paraneoplastic tissue, middle paraneoplastic tissue, remote paraneoplastic tissue, and normal ovarian tissue were removed. CK-7, CA125, p53, survivin, MMP-2, and TIMP-2 expression was detected by reverse transcription polymerase chain reaction. We obtained 35 paraneoplastic residual ovarian tissues with normal biopsies from 40 cases of an orthotopic epithelial ovarian carcinoma model (87.5%). CK-7, CA125, p53, survivin, MMP-2, and TIMP-2 expression was lower in proximal paraneoplastic tissue than in cancer tissue (P < 0.05) and higher than in middle and remote paraneoplastic tissue (P < 0.01). There was no statistically significant difference between the expression of these genes in middle and proximal paraneoplastic tissue as well as among residual normal ovarian tissues with different severity (P > 0.05). In ovarian tissues of 20 normal nude mice, the expression of CK- 7, CA125, p53, survivin, MMP-2, and TIMP-2 was negative. Overall, the expression levels of CK-7, CA125, p53, survivin, MMP-2, TIMP-2, and other molecular markers showed a decreasing trend in the non-cancer tissue direction. The expression levels can be used as standards to screen residual normal ovarian tissue. We can obtain relatively safe normal ovarian tissues adjacent to epithelial ovarian cancer.
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Affiliation(s)
- G H Zhu
- Department of Gynecology, Hainan Provincial People's Hospital, Haikou, Hainan, China
| | - S T Wang
- Department of Gynecology, Hainan Provincial People's Hospital, Haikou, Hainan, China
| | - M Z Yao
- Department of Gynecology, Hainan Provincial People's Hospital, Haikou, Hainan, China
| | - J H Cai
- Research Center, Hainan Provincial People's Hospital, Haikou, Hainan, China
| | - C Y Chen
- Department of Gynecology, Hainan Provincial People's Hospital, Haikou, Hainan, China
| | - Z X Yang
- Hainan Medical College, Drug Safety Evaluation Center, Haikou, Hainan, China
| | - L Hong
- Department of Gynecology, Hainan Provincial People's Hospital, Haikou, Hainan, China
| | - S Y Yang
- Department of Gynecology, Hainan Provincial People's Hospital, Haikou, Hainan, China
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Zhang YH, Xu HS, Litvinov YA, Tu XL, Yan XL, Typel S, Blaum K, Wang M, Zhou XH, Sun Y, Brown BA, Yuan YJ, Xia JW, Yang JC, Audi G, Chen XC, Jia GB, Hu ZG, Ma XW, Mao RS, Mei B, Shuai P, Sun ZY, Wang ST, Xiao GQ, Xu X, Yamaguchi T, Yamaguchi Y, Zang YD, Zhao HW, Zhao TC, Zhang W, Zhan WL. Mass measurements of the neutron-deficient 41Ti, 45Cr, 49Fe, and 53Ni nuclides: first test of the isobaric multiplet mass equation in f p-shell nuclei. Phys Rev Lett 2012; 109:102501. [PMID: 23005283 DOI: 10.1103/physrevlett.109.102501] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2012] [Indexed: 06/01/2023]
Abstract
Isochronous mass spectrometry has been applied to neutron-deficient 58Ni projectile fragments at the HIRFL-CSR facility in Lanzhou, China. Masses of a series of short-lived T(z)=-3/2 nuclides including 41Ti, 45Cr, 49Fe, and 53Ni have been measured with a precision of 20-40 keV. The new data enable us to test for the first time the isobaric multiplet mass equation (IMME) in fp-shell nuclei. We observe that the IMME is inconsistent with the generally accepted quadratic form for the A=53, T=3/2 quartet. We perform full space shell model calculations and compare them with the new experimental results.
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Affiliation(s)
- Y H Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
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Ponsinet V, Barois P, Pan L, Wang S, Huang CC, Wang ST, Pindak R, Baumeister U, Weissflog W. Characterization of a chiral phase in an achiral bent-core liquid crystal by polarization studies of resonant x-ray forbidden reflections. Phys Rev E Stat Nonlin Soft Matter Phys 2011; 84:011706. [PMID: 21867195 DOI: 10.1103/physreve.84.011706] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2011] [Indexed: 05/31/2023]
Abstract
The chiral antiferroelectric structure of an achiral bent-core liquid crystal is characterized by resonant x-ray scattering at chlorine K edge. The "forbidden" reflections resulting from the glide or screw symmetry elements are restored by the anisotropy of the tensor structure factor, which we calculate for two possible structural models. A careful analysis of the polarization states of the restored "forbidden" reflections enables an unambiguous identification of a chiral structure (i.e., the so-called anticlinic, antiferroelectric smectic-C or Sm-C(A)P(A)) coexisting with the achiral synclinic antiferroelectric smectic-C or Sm-C(S)P(A). The method proves to be quite powerful as it identifies the chiral structure within coexisting phases despite an imperfect orientation of the sample. The volume fraction of the chiral phase and the distribution of alignment are extracted from the data.
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Affiliation(s)
- V Ponsinet
- Centre de Recherche Paul Pascal, Université Bordeaux 1, CNRS, Av A Schweitzer, FR-33600 Pessac, France
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Pan L, McCoy BK, Wang S, Liu ZQ, Wang ST, Pindak R, Huang CC. Effect of enantiomeric excess on the phase behavior of antiferroelectric liquid crystals. Phys Rev E Stat Nonlin Soft Matter Phys 2011; 83:060701. [PMID: 21797292 DOI: 10.1103/physreve.83.060701] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2011] [Indexed: 05/31/2023]
Abstract
Null transmission ellipsometry and resonant x-ray diffraction are employed to study the effect of enantiomeric excess (EE) on the phase behavior of antiferroelectric liquid crystal 10OTBBB1M7. Phase sequence, layer spacing, and pitch of the helical structures of the smectic-C(α)* and smectic-C* phases are studied as a function of temperature and EE. Upon reducing EE, a liquid-gas-type critical point of the smectic-C(α)* to smectic-C* transition is observed, as well as the disappearance of the smectic-C(d4)* and the smectic-C(d3)* phases. Results are analyzed in a mean-field model.
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Affiliation(s)
- LiDong Pan
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
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22
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Wang ST, Lu HZ, Ma N, Bao Y, Wang HY, Liu ZG, Yao WR. [DFT and surface-enhanced Raman scattering studies of BPA]. Guang Pu Xue Yu Guang Pu Fen Xi 2011; 31:1006-1009. [PMID: 21714248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
On the base of the vibration theory, the spectrum of bisphenol A(BPA) molecule was calculated by the density functional theory(DFT) using B3LYP/6-311G(d), and the normal Raman spectrum (NRS) of BPA was assigned in detail. The surface enhanced Raman scattering (SERS) of the BPA molecule was obtained by gold sol enhancement. The adsorption of BPA to gold surface was analyzed: in acidic pH, the molecule was adsorbed on the gold surface by =CO-, the vibration of the band O-H disappeared, and the benzene ring was perpendicular on the surface of gold sol.
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Affiliation(s)
- Shi-Tao Wang
- School of Food Science & Technology, Jiangnan University, Wuxi 214122, China.
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23
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Tu XL, Xu HS, Wang M, Zhang YH, Litvinov YA, Sun Y, Schatz H, Zhou XH, Yuan YJ, Xia JW, Audi G, Blaum K, Du CM, Geng P, Hu ZG, Huang WX, Jin SL, Liu LX, Liu Y, Ma X, Mao RS, Mei B, Shuai P, Sun ZY, Suzuki H, Tang SW, Wang JS, Wang ST, Xiao GQ, Xu X, Yamaguchi T, Yamaguchi Y, Yan XL, Yang JC, Ye RP, Zang YD, Zhao HW, Zhao TC, Zhang XY, Zhan WL. Direct mass measurements of short-lived A=2Z-1 nuclides (63)Ge, (65)As, (67)Se, and (71)Kr and their impact on nucleosynthesis in the rp process. Phys Rev Lett 2011; 106:112501. [PMID: 21469858 DOI: 10.1103/physrevlett.106.112501] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2011] [Indexed: 05/30/2023]
Abstract
Mass excesses of short-lived A=2Z-1 nuclei (63)Ge, (65)As, (67)Se, and (71)Kr have been directly measured to be -46,921(37), -46,937(85), -46,580(67), and -46,320(141) keV, respectively. The deduced proton separation energy of -90(85) keV for (65)As shows that this nucleus is only slightly proton unbound. X-ray burst model calculations with the new mass excess of (65)As suggest that the majority of the reaction flow passes through (64)Ge via proton capture, indicating that (64)Ge is not a significant rp-process waiting point.
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Affiliation(s)
- X L Tu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
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24
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McCoy BK, Pan L, Liu ZQ, Wang ST, Wang S, Goodby JW, Huang CC. Evolution of a rare sequence of surface transitions with temperature and film thickness. Phys Rev E Stat Nonlin Soft Matter Phys 2010; 81:031712. [PMID: 20365756 DOI: 10.1103/physreve.81.031712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2010] [Indexed: 05/29/2023]
Abstract
In free-standing smectic films, layers near the surfaces of the film often contain molecules tilted away from the layer normal, while in the bulk of the film the magnitude of the tilt decays exponentially with distance from the surface. We have identified the detailed molecular tilt orientations in the surface layers of films for one antiferroelectric liquid crystal compound. A series of five surface structures exists with different nonplanar tilt arrangements for each structure. The molecular orientations in the surface layers evolve with temperature. The polarization of the film also evolves with temperature, corresponding to the tilt arrangements. Using ellipsometric data, we reconstruct the changes in the magnitude and azimuthal direction of the tilt as functions of temperature. We have also studied films of several different thicknesses. We present a phase diagram for the five surface structures showing the dependence on temperature and film thickness.
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Affiliation(s)
- B K McCoy
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
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McCoy BK, Liu ZQ, Wang ST, Pan L, Wang S, Goodby JW, Huang CC. Nonplanar tilts in very thin smectic films of one liquid-crystal compound. Phys Rev E Stat Nonlin Soft Matter Phys 2009; 79:061702. [PMID: 19658511 DOI: 10.1103/physreve.79.061702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2009] [Indexed: 05/28/2023]
Abstract
Surface effects cause tilted molecular arrangements in smectic layers near the surface of a free-standing liquid-crystal film in which the bulk of the film is in the smectic- A phase. One recent work has shown that the tilt directions in adjacent surface layers may be nonplanar. In this paper we study films with thicknesses of two to six smectic layers. Surface effects dominate in these very thin films. We show that the molecular tilts are nonplanar even in these very thin films.
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Affiliation(s)
- B K McCoy
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
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26
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Wang S, Pan L, McCoy BK, Wang ST, Pindak R, Nguyen HT, Huang CC. Recovery of a reversed phase sequence in one ternary liquid-crystal-mixture system. Phys Rev E Stat Nonlin Soft Matter Phys 2009; 79:021706. [PMID: 19391764 DOI: 10.1103/physreve.79.021706] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2008] [Revised: 11/17/2008] [Indexed: 05/27/2023]
Abstract
The nOHFBBB1M7 (n=10) compound, 10OHF, shows a reversed SmC{FI2}-SmC phase sequence, unique among all known antiferroelectric liquid crystals. This reversed phase sequence is stabilized when 10OHF is doped with 9OTBBB1M7(C9) or 11OTBBB1M7(C11). In contrast, doping of the homologous members ( n=9 , 11, or 12) eliminates the SmC{FI2} phase. One 10OHF/11OHF mixture without the SmC{FI2} phase was selected for further studies. By adding C9 into this particular mixture, the reversed phase sequence is revived. To our surprise, even though 11OHF destabilizes the SmC_{FI2} phase in binary mixtures with 10OHF, it significantly increases the SmC_{FI2} temperature range in the 10OHF/11OHF/C9 ternary mixtures.
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Affiliation(s)
- Shun Wang
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
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27
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McCoy BK, Liu ZQ, Wang ST, Pan L, Wang S, Nguyen HT, Pindak R, Huang CC. Effects of doping on an unusual smectic- C*alpha-smectic-C*FI2-smectic-C* phase sequence. Phys Rev E Stat Nonlin Soft Matter Phys 2008; 77:061704. [PMID: 18643284 DOI: 10.1103/physreve.77.061704] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2008] [Indexed: 05/26/2023]
Abstract
The compound 10OHF has a partially inverted phase sequence, unique among the series of nOHF homologous compounds and all other known liquid crystals, with the smectic-C*FI2 (SmC*FI2) phase occurring at higher temperature than the smectic-C* (SmC*) phase. We present ellipsometric data to identify the phase sequences of 9OHF, 10OHF, 11OHF, and 12OHF. Binary mixtures of 10OHF with C11, a compound with the typical phase sequence among the smectic phases, show that the unusual phase sequence of 10OHF stabilizes upon mixing and that SmC*FI2 predominates over SmC* throughout the entire mixing phase diagram. In thin films of some mixtures, surface interactions induce a reentrant SmC*FI2-SmC*-SmC*FI2 transition in the rest of the film.
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Affiliation(s)
- B K McCoy
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA and Department of Mathematics and Physics, Azusa Pacific University, Azusa, California 91702, USA
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Wang ST, Fukuto M, Yang L. In situ x-ray reflectivity studies on the formation of substrate-supported phospholipid bilayers and monolayers. Phys Rev E Stat Nonlin Soft Matter Phys 2008; 77:031909. [PMID: 18517424 DOI: 10.1103/physreve.77.031909] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2007] [Indexed: 05/26/2023]
Abstract
We conducted time-dependent, in situ x-ray reflectivity measurements on the formation of substrate-supported lipid monolayers and bilayers at solid-liquid interfaces, buried under an aqueous buffer with various concentrations (5, 10, 20, 40, and 50 microg/ml ) of lipid 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC). The DOPC bilayer is formed on the hydrophilic surface of a bare Si substrate, while the DOPC monolayer is formed on a hydrophobic octadecylthricholorsilane (OTS) monolayer-coated Si substrate. The evolution of the reflectivity curves from the lipid bilayers is well described by lateral growth of bilayer islands, consistent with the rupture and fusion model for the adsorption of lipid vesicles to solid-liquid interfaces. By contrast, the formation of the lipid monolayer on OTS-coated Si occurs through a relatively fast coverage of the entire interfacial area, followed by an increase in the monolayer thickness. For both monolayers and bilayers, the rate of lipid layer growth increases with increasing lipid concentration in the buffer solution.
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Affiliation(s)
- S T Wang
- National Synchrotron Light Source, Brookhaven National Laboratory, Upton, New York 11973, USA
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29
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Fernandes P, Barois P, Wang ST, Liu ZQ, McCoy BK, Huang CC, Pindak R, Caliebe W, Nguyen HT. Polarization studies of resonant forbidden reflections in liquid crystals. Phys Rev Lett 2007; 99:227801. [PMID: 18233329 DOI: 10.1103/physrevlett.99.227801] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2007] [Indexed: 05/25/2023]
Abstract
We report the results of resonant x-ray diffraction experiments performed on thick films of a biaxial liquid crystal made of achiral bent-core molecules. Polarization properties of forbidden reflections are observed as a function of the sample rotation angle phi about the scattering vector Q for the first time on a fluid material. The experimental data are successfully analyzed within a tensor structure factor model by taking the nonperfect alignment of the liquid crystal into account. The local structure of the B2 mesophase is hence determined to be SmC_{S}P_{A}.
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Affiliation(s)
- P Fernandes
- Université Bordeaux 1, CNRS, Centre de Recherche Paul Pascal, Avenue A. Schweitzer, 33600 Pessac, France
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30
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Liu ZQ, McCoy BK, Wang ST, Pindak R, Caliebe W, Barois P, Fernandes P, Nguyen HT, Hsu CS, Wang S, Huang CC. Unique pitch evolution in the smectic-C+alpha phase. Phys Rev Lett 2007; 99:077802. [PMID: 17930926 DOI: 10.1103/physrevlett.99.077802] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2007] [Indexed: 05/25/2023]
Abstract
Employing resonant x-ray diffraction, we observed unique pitch evolutions in the smectic-C*(alpha) phase in mixtures of two antiferroelectric liquid crystals. Our results show that the pitch in this phase continuously evolves across 4 layers, contradicting a theoretical model that predicts that the smectic-C*(FI2) phase intervenes in the smectic-C*(alpha) phase. The phase sequences we found can be explained by another model that includes one type of long-range interaction among smectic layers.
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Affiliation(s)
- Z Q Liu
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
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31
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McCoy BK, Liu ZQ, Wang ST, Pindak R, Takekoshi K, Ema K, Seed A, Huang CC. Smectic-C*alpha phase with two coexistent helical pitch values and a first-order smectic-C*alpha to smectic-C* transition. Phys Rev E Stat Nonlin Soft Matter Phys 2007; 75:051706. [PMID: 17677083 DOI: 10.1103/physreve.75.051706] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2007] [Indexed: 05/16/2023]
Abstract
Previous results from Kundu using dielectric relaxation have suggested a reentrant antiferroelectric-ferroelectric-antiferroelectric transition in the compound LN36. Our comprehensive studies of this compound using differential optical reflectivity, nonadiabatic scanning calorimetry, null transmission ellipsometry, and resonant x-ray diffraction show that in fact LN36 exhibits the usual phase sequence for chiral smectic liquid crystals: SmA*-SmC*alpha-SmC*-SmC*FI1-SmC*A . Moreover, the SmC*alpha-SmC* transition is a first-order transition, characterized by a discontinuous change in the helical pitch. At temperatures just above the SmC*alpha-SmC* transition, two different values for the helical pitch are simultaneously observed for the first time.
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Affiliation(s)
- B K McCoy
- School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USA
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32
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Wang ST, Han XF, Liu ZQ, McCoy BK, Huang CC. Optical studies on the surface-induced tilted layers in freestanding films of two no-layer-shrinkage liquid crystal compounds. Phys Rev E Stat Nonlin Soft Matter Phys 2006; 74:031707. [PMID: 17025654 DOI: 10.1103/physreve.74.031707] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2006] [Indexed: 05/12/2023]
Abstract
Null transmission ellipsometry has been employed to study the molecular arrangements in freestanding films of two no-layer-shrinkage liquid crystal homologous compounds above the bulk smectic A-smectic C* (Sm C*) transition temperature. An unusual nonplanar-parallel or nonplanar-antiparallel-parallel transition has been observed in both compounds under a proper electric field. With the addition of one CH2 group, while the SmC* phase is more stable thermally, the magnitude of the critical field needed to induce a parallel-antiparallel transition decreases dramatically.
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Affiliation(s)
- S T Wang
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
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33
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Liu ZQ, Wang ST, McCoy BK, Cady A, Pindak R, Caliebe W, Takekoshi K, Ema K, Nguyen HT, Huang CC. Smectic-Calpha*-smectic-C* phase transition and critical point in binary mixtures. Phys Rev E Stat Nonlin Soft Matter Phys 2006; 74:030702. [PMID: 17025581 DOI: 10.1103/physreve.74.030702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2006] [Indexed: 05/12/2023]
Abstract
We have investigated the smectic-Calpha*-smectic-C* (SmCalpha*-SmC*) transition in a series of binary mixtures with resonant x-ray diffraction, differential optical reflectivity, and heat capacity measurements. Results show that the phases are separated by a first-order transition that ends at a critical point. We report the observation of such a critical point. We have proposed the appropriate order parameter and obtained values of two critical exponents associated with this transition. The values of the critical exponents suggest that long-range interactions are present in the SmCalpha*-SmC* critical region.
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Affiliation(s)
- Z Q Liu
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
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34
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McCoy BK, Liu ZQ, Wang ST, Panov VP, Vij JK, Goodby JW, Huang CC. Surface-induced multiple reentrant transitions. Phys Rev E Stat Nonlin Soft Matter Phys 2006; 73:041704. [PMID: 16711824 DOI: 10.1103/physreve.73.041704] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2005] [Indexed: 05/09/2023]
Abstract
We have studied tilted surface layers in the bulk SmA temperature window of one liquid crystal using null transmission ellipsometry. Five distinct nonplanar surface structures were observed. We present analyses of the tilt and azimuthal profiles of the structures and examine the transitions between the structures. The transitions are identified as a double reentrant synclinic-anticlinic-synclinic-anticlinic transition. Meanwhile, the transitions also display reentrant ferroelectric-antiferroelectric-ferroelectric behavior.
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Affiliation(s)
- B K McCoy
- School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USA
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35
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Wang ST, Liu ZQ, McCoy BK, Pindak R, Caliebe W, Nguyen HT, Huang CC. Optical and resonant X-ray diffraction studies confirm a SmC*FI2-SmC* liquid crystal phase sequence reversal. Phys Rev Lett 2006; 96:097801. [PMID: 16606316 DOI: 10.1103/physrevlett.96.097801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2005] [Indexed: 05/08/2023]
Abstract
Employing both null transmission ellipsometry and resonant x-ray diffraction, we confirmed the SmC*FI2-SmC* phase sequence reversal in one liquid crystal compound and specially prepared binary mixtures. This phase sequence reversal was predicted by two recent theoretical advances. Moreover, the temperature range for the SmC*FI2 phase increases significantly in the mixture suggesting that such a phase sequence may exist in other compounds.
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Affiliation(s)
- S T Wang
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
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36
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Ema K, Takekoshi K, Yao H, Wang ST, Huang CC. Calorimetric investigations of liquid-crystal compounds exhibiting almost no layer-shrinkage behavior through the smectic-A-smectic- C* transition. Phys Rev E Stat Nonlin Soft Matter Phys 2005; 71:031706. [PMID: 15903446 DOI: 10.1103/physreve.71.031706] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2004] [Indexed: 05/02/2023]
Abstract
Heat-capacity measurements have been made on liquid-crystal compounds exhibiting almost no layer-shrinkage (NLS) behavior through the Sm-A-Sm- C(*) phase transition. The transition was found to be second order for two of the substances studied. It was found that the heat-capacity anomaly accompanying a second-order Sm-A-Sm- C(*) transition with NLS behavior is quite similar to that observed for typical antiferroelectric liquid crystals of the 4-(1-methylheptyloxycarbonyl)phenyl 4'-octyloxybiphenyl-4-carboxylate (MHPOBC) group, showing three-dimensional (3D) XY behavior in the vicinity of the transition. On the other hand, for one compound which shows a weakly first-order transition, the anomaly is almost symmetric above and below T(c) , with a significant fluctuation effect in the Sm-A phase. For this compound, the critical behavior of the heat-capacity anomaly is almost tricritical in the immediate vicinity of T(c) , while away from T(c) the behavior can be explained with the 3D XY model. This suggests that the underlying transition with the 3D XY critical behavior is driven to almost being tricritical but remaining weakly first order. No indication of low-dimensional character in the critical behavior was found in both cases.
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Affiliation(s)
- K Ema
- Department of Physics, Graduate School of Science and Engineering, Tokyo Institute of Technology, Meguro, Japan.
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Veum M, Kutschera E, Voshell N, Wang ST, Wang SL, Nguyen HT, Huang CC. Temperature variation of film tension above the bulk smectic-A-isotropic transition in freestanding liquid-crystal films. Phys Rev E Stat Nonlin Soft Matter Phys 2005; 71:020701. [PMID: 15783308 DOI: 10.1103/physreve.71.020701] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2004] [Indexed: 05/24/2023]
Abstract
We have measured the temperature variation of film tension above the bulk smectic-A-isotropic transition in freestanding films of two liquid-crystal compounds. Above the transition, the tension increases sharply with temperature, and the slope is proportional to the film's thickness regardless of whether or not the compound exhibits regular layer-by-layer thinning. The data can be interpreted in the context of theoretical models for layer thinning.
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Affiliation(s)
- M Veum
- Department of Physics and Astronomy, University of Wisconsin-Stevens Point, Stevens Point, Wisconsin 55481, USA.
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Chien WY, Yang KD, Eng HL, Hu YH, Lee PY, Wang ST, Wang PW. Increased plasma concentration of nitric oxide in type 2 diabetes but not in nondiabetic individuals with insulin resistance. Diabetes & Metabolism 2005; 31:63-8. [PMID: 15803115 DOI: 10.1016/s1262-3636(07)70168-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVE Insulin resistance (IR) is a key element in the pathogenesis of type 2 diabetes. The results of recent experiments on insulin-mediated vasodilatation have suggested that vascular insensitivity is a component of IR. However, it is still controversial that patients with type 2 diabetes have a decreased ability of insulin to increase endothelial nitric oxide (NO) release. METHOD Plasma concentration of NO was examined in 26 patients with type 2 diabetes and 78 nondiabetic volunteers during an insulin suppression test. The test measured the efficacy of insulin in promoting disposal of the infused glucose load, in which the steady state plasma glucose (SSPG) during the 150-180 min of the test was used as an index of IR. Plasma NO levels were assayed by measurement of the stable end products of their metabolism. Comparison of plasma NO levels between groups were performed by Mann-Whitney test and relationships between SSPG and different variables were analyzed by partial correlations. RESULTS Our results showed that the plasma NO levels were significantly higher in the diabetic group. When the nondiabetic subjects were analyzed according to their SSPG levels, there was no difference of plasma NO levels between those with SSPG>160 mg/dl and those with SSPG<160 mg/dl. There were also no difference of NO levels between those with a family history of type 2 diabetes and those without. In the nondiabetic group, SSPG correlated with BMI, fasting insulin, triglyceride and HDL-cholesterol, but neither with plasma NO levels nor fasting plasma glucose. CONCLUSION Our data suggests that the impairment of NO activity in patients with type 2 diabetes is due to an impaired effect rather than its production. This altered NO signaling pathway is not an early event in insulin resistant individuals. Any such changes will not be apparent until type 2 diabetes with overt hyperglycemia develops.
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Affiliation(s)
- W Y Chien
- Department of Internal Medicine, Chang Gung Memorial Hospital, Kaohsiung, Taiwan
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Wang ST, Han XF, Cady A, Liu ZQ, Kamenev A, Glazman L, Sadashiva BK, Reddy RA, Huang CC. Optical investigations on the biaxial smectic- A phase of a bent-core compound. Phys Rev E Stat Nonlin Soft Matter Phys 2004; 70:061705. [PMID: 15697388 DOI: 10.1103/physreve.70.061705] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2003] [Indexed: 05/24/2023]
Abstract
Several unique optical properties have been obtained from freestanding films of a bent-core compound. Our experimental results indicate the existence of the antiferroelectric biaxial smectic-A (Sm A) phase. The critical exponent associated with the biaxiality through the uniaxial-antiferroelectric biaxial Sm A transition has been measured to be 0.82+/-0.04 , which is in good agreement with our theoretical calculation. Our theoretical advances further demonstrate that the critical behavior of the optical biaxiality with the order parameter being a vector is described by the secondary-order parameter of the three-dimensional XY model. We also observe a remarkable even-odd layering effect exhibited by the surface layers of freestanding films under an applied electric field (approximately 20 V/cm) in the film plane.
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Affiliation(s)
- S T Wang
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
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40
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Huang CC, Wang ST, Han XF, Cady A, Pindak R, Caliebe W, Ema K, Takekoshi K, Yao H. Experimental investigations of one liquid-crystal compound exhibiting the no-layer-shrinkage effect near the Sm-A-Sm- C(*) transition. Phys Rev E Stat Nonlin Soft Matter Phys 2004; 69:041702. [PMID: 15169028 DOI: 10.1103/physreve.69.041702] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2003] [Indexed: 05/24/2023]
Abstract
Three experimental probes have been employed to investigate the nature of the smectic- A -smectic- C ( Sm-A-Sm- C(*) ) phase transition of one liquid-crystal compound showing almost no layer-shrinkage effect through the transition. Results from both x-ray diffraction and optical studies indicate that the compound exhibits a crossover behavior of different molecular packing arrangements within the bulk Sm-A phase window. The calorimetry results show a significant critical anomaly near the Sm-A-Sm- C(*) transition, although it was found to be weakly first order.
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Affiliation(s)
- C C Huang
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
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41
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Wang ST, Han XF, Liu ZQ, Cady A, Radcliffe MD, Huang CC. Unusual behavior of the surface-induced tilted layers in free-standing films of a non-layer-shrinkage liquid crystal compound. Phys Rev E Stat Nonlin Soft Matter Phys 2003; 68:060702. [PMID: 14754172 DOI: 10.1103/physreve.68.060702] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2003] [Indexed: 05/24/2023]
Abstract
Null-transmission ellipsometry has been conducted to study the molecular arrangements in free-standing films of one chiral compound above the bulk smectic-A-smectic-C* transition temperature. Upon cooling under a proper electric field, a nonplanar-anticlinic-synclinic or a nonplanar-synclinic transition has been observed. The nonplanar structure continuously evolves into the anticlinic or synclinic structures. Increasing electric field can induce a rare transition from a synclinic to an anticlinic structure.
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Affiliation(s)
- S T Wang
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
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Han XF, Wang ST, Cady A, Liu ZQ, Findeisen S, Weissflog W, Huang CC. Optical studies on free-standing films of an achiral smectic liquid crystal. Phys Rev E Stat Nonlin Soft Matter Phys 2003; 68:060701. [PMID: 14754171 DOI: 10.1103/physreve.68.060701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2003] [Revised: 09/10/2003] [Indexed: 05/24/2023]
Abstract
Employing null transmission ellipsometry and depolarized reflected light microscopy, we have studied two smectic phases, Sm-C1 and Sm-C2, of one achiral mesogen. Our results show that Sm-C1 and Sm-C2 are the synclinic Sm-C and anticlinic Sm-C(A) phases, respectively. We find no evidence to support recent claims that the Sm-C1 is chiral and ferroelectric [R. Stannarius et al., Phys. Rev. Lett. 90, 025502 (2003)].
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Affiliation(s)
- X F Han
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
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43
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Lin C, Wang ST, Wu CW, Chuo LJ, Kuo YM. The association of a cystatin C gene polymorphism with late-onset Alzheimer's disease and vascular dementia. CHINESE J PHYSIOL 2003; 46:111-5. [PMID: 14672279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023] Open
Abstract
A polymorphism in the cystatin C (CST3) gene was suggested to associate with Alzheimer's disease (AD). In the present study we attempted to determine the association between CST3 polymorphism and AD or vascular dementia (VD), and whether such effects are dependent of the APOE4 allele. The polymorphisms of CST3 genotype were determined using polymerase chain reactions (PCR) followed by gel electrophoresis in 124 AD, 70 VD, and 115 control individuals. No statistical difference in CST3B allele frequencies was observed among all three groups. Associations between CST3B/B genotype and AD patients older than 75-year-old, or VD patients younger than 75-year-old were evident. The APOE4 allele alone significantly increased the odds for the developing AD, but not VD. A logistic regression analysis revealed that either CST3 or its interaction with APOE4 were not significant predictors of AD. However, a synergistic association of CST3 and APOE4 alleles was observed in predicting VD patients. These results suggest that CST3 might interact with APOE4 on conferring vascular pathologies.
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Affiliation(s)
- C Lin
- Department of Physiology, China Medical College, Taichung, Taiwan
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Han XF, Wang ST, Cady A, Radcliffe MD, Huang CC. Double reentrance of surface arrangements in freestanding liquid crystal films. Phys Rev Lett 2003; 91:045501. [PMID: 12906671 DOI: 10.1103/physrevlett.91.045501] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2003] [Indexed: 05/24/2023]
Abstract
The molecular arrangement of tilted surface layers on freestanding films above the bulk smectic-A-smectic-C(*) transition has been studied by null transmission ellipsometry. In the presence of an applied in-plane electric field, a synclinic-anticlinic-synclinic-anticlinic double reentrance has been observed. Furthermore, we have characterized a novel transition from the synclinic arrangement to a structure in which the interior layers tilt in the same orientation and the outermost surface layers tilt oppositely with the interior layers.
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Affiliation(s)
- X F Han
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
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45
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Andreyev HJN, Benamouzig R, Beranek M, Clarke P, Cunningham D, Norman AR, Giaretti W, de Goeij AFPM, Iacopetta BJ, Jullian E, Krtolica K, Lee JQ, Wang ST, Lees N, Al-Mulla F, Muller O, Pauly M, Pricolo V, Russo A, Troungos C, Urosevic N, Ward R. Mutant K-ras2 in serum. Gut 2003; 52:915-6. [PMID: 12740358 PMCID: PMC1773684 DOI: 10.1136/gut.52.6.915-a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/08/2022]
Affiliation(s)
| | | | - M Beranek
- Charles University Hospital, Hradec Kralove, Czech Republic
| | - P Clarke
- Institute of Cancer Research, Sutton, UK
| | | | | | - W Giaretti
- Istituto Nazionale per la Ricerca sul Cancro, Genova, Italy
| | | | - B J Iacopetta
- University of Western Australia, Nedlands, Australia
| | - E Jullian
- Groupe Hospitalier Cochin-Saint Vincent de Paul, Paris, France
| | - K Krtolica
- Institute of Nuclear Sciences “Vinca” Belgrade, Yugoslavia
| | - J Q Lee
- National Cheng Kung University, Taiwan
| | - S T Wang
- National Cheng Kung University, Taiwan
| | - N Lees
- Wythenshawe Hospital, Manchester, UK
| | | | - O Muller
- Max-Planck-Institut fur Molekulare Physiologie, Dortmund, Germany
| | - M Pauly
- Centre Universitaire de Luxembourg, Luxembourg
| | - V Pricolo
- Rhode Island Hospital, Brown University, USA
| | - A Russo
- University of Palermo, Italy
| | | | - N Urosevic
- Military Medical Academy, Belgrade, and University of Western Australia, Nedlands, Australia
| | - R Ward
- St Vincent’s Hospital, Darlinghurst, Australia
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Cady A, Liu ZQ, Han XF, Wang ST, Veum M, Janarthanan N, Hsu CS, Olson DA, Huang CC. Effect of enantiomeric excess on surface structures and phase sequences in free-standing liquid-crystal films. Phys Rev E Stat Nonlin Soft Matter Phys 2002; 66:061704. [PMID: 12513302 DOI: 10.1103/physreve.66.061704] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2002] [Indexed: 05/24/2023]
Abstract
We present differential optical reflectivity and null transmission ellipsometry data from several mixtures of MHPBC enantiomers. From this data, we have determined the chiral smectic phase sequence as a function of enantiomeric excess. The data suggest a change in the structure of the smectic-C(*)(alpha) phase and the surface tilt state as the enantiomeric excess is reduced. The results also show that the intermediate phases, smectic C(*)(FI2), smectic C(*)(FI1), and smectic C(*)(alpha), disappear sequentially on reducing the net chirality.
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Affiliation(s)
- A Cady
- School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USA
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47
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Wu MH, Pan HA, Wang ST, Hsu CC, Chang FM, Huang KE. Quality of life and sexuality changes in postmenopausal women receiving tibolone therapy. Climacteric 2001; 4:314-9. [PMID: 11770188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE The goal of this study was to investigate the effects of hormone replacement therapy (HRT) and tibolone on the sexuality and quality of life of Taiwanese postmenopausal women. METHODS Forty-eight postmenopausal women were enrolled and prospectively randomized to receive either HRT or tibolone for 3 months. At the end of the 3-month period, quality of life measures were assessed using the Greene Climacteric Scale and attitudes of sexuality were evaluated using the McCoy Sex Scale. RESULTS Based on subjective qualitative scores, tibolone treatment was at least as effective as continuous combined HRT in improving quality of life. It also effectively prevented withdrawal bleeding, which may occur during HRT use. Compared with continuous combined HRT, tibolone treatment was also associated with perceived improvement of sexual performance, including general sexual satisfaction, sexual interest, sexual fantasies, sexual arousal and orgasm, with decreased frequencies of vaginal dryness and painful intercourse. CONCLUSIONS The findings of this study indicate that both tibolone and continuous combined HRT have positive effects on the quality of life of Taiwanese postmenopausal women. Sexuality is affected more by tibolone than by HRT.
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Affiliation(s)
- M H Wu
- Departments of Obstetrics and Gynecology, College of Medicine, National Cheng-Kung University, Tainan, Taiwan
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Chiou YY, Wang ST, Tang MJ, Lee BF, Chiu NT. Renal fibrosis: prediction from acute pyelonephritis focus volume measured at 99mTc dimercaptosuccinic acid SPECT. Radiology 2001; 221:366-70. [PMID: 11687677 DOI: 10.1148/radiol.2212010146] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
PURPOSE To evaluate whether acute pyelonephritis lesion volume derived from acute technetium 99m ((99m)Tc) dimercaptosuccinic acid (DMSA) renal single photon emission computed tomographic (SPECT) images is predictive of the development of subsequent renal fibrosis. MATERIALS AND METHODS Children with acute pyelonephritis underwent (99m)Tc DMSA renal SPECT during acute infection and 6-10 months later. At quantitative analysis, the volume of photopenic lesions and the ratio of radioactivity in the photopenic lesion to that in normal renal tissue were calculated. Sensitivity, specificity, and positive and negative predictive values were determined. RESULTS Sixty-nine acute pyelonephritis foci in 44 children were analyzed. Thirty-seven (54%) of these lesions were normal on follow-up renal scans, while 32 (46%) developed scars. Significant differences in the photopenic lesion volume were found between the two groups (P < .001). When photopenic lesion volume indicated a positive diagnosis (>or=4.6-cm(3) lesion volume), sensitivity, specificity, positive predictive, and negative predictive values were 96.7%, 92.3%, 90.6%, and 97.3%, respectively. CONCLUSION Quantitative analysis of acute DMSA renal SPECT findings is valuable in predicting renal fibrosis. The volume of an acute pyelonephritis lesion is useful in predicting the development of fibrosis.
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Affiliation(s)
- Y Y Chiou
- Department of Pediatrics and Institute of Clinical Medical Sciences, National Cheng Kung University Medical Center and College of Medicine, 138 Sheng-Li Rd, Tainan, Taiwan 704, Republic of China
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Yang YL, Deng YH, Wang ST, Zong RF. [Synthesis, characterization and fluorescence property of europium ternary complex p-nitrophenylacetic acid and 1, 10-phenanthroline]. Guang Pu Xue Yu Guang Pu Fen Xi 2001; 21:680-681. [PMID: 12945330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The europium ternary solid complex containing p-nitrophenylacetic acid and 1, 10-phenanthroline was synthesized in this work, and the chemical formula of this compound was determined to be EuL3 phen by elemental analysis. The complex has been characterized by analysis of molar conductivity, TG-DTA, IR and UV. The fluorescence spectra of this Eu3+ complex has been investigated also in this paper.
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Affiliation(s)
- Y L Yang
- Department of Chemistry, Capital Normal University, Beijing 100037, China
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50
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Andreyev HJ, Norman AR, Cunningham D, Oates J, Dix BR, Iacopetta BJ, Young J, Walsh T, Ward R, Hawkins N, Beranek M, Jandik P, Benamouzig R, Jullian E, Laurent-Puig P, Olschwang S, Muller O, Hoffmann I, Rabes HM, Zietz C, Troungos C, Valavanis C, Yuen ST, Ho JW, Croke CT, O'Donoghue DP, Giaretti W, Rapallo A, Russo A, Bazan V, Tanaka M, Omura K, Azuma T, Ohkusa T, Fujimori T, Ono Y, Pauly M, Faber C, Glaesener R, de Goeij AF, Arends JW, Andersen SN, Lövig T, Breivik J, Gaudernack G, Clausen OP, De Angelis PD, Meling GI, Rognum TO, Smith R, Goh HS, Font A, Rosell R, Sun XF, Zhang H, Benhattar J, Losi L, Lee JQ, Wang ST, Clarke PA, Bell S, Quirke P, Bubb VJ, Piris J, Cruickshank NR, Morton D, Fox JC, Al-Mulla F, Lees N, Hall CN, Snary D, Wilkinson K, Dillon D, Costa J, Pricolo VE, Finkelstein SD, Thebo JS, Senagore AJ, Halter SA, Wadler S, Malik S, Krtolica K, Urosevic N. Kirsten ras mutations in patients with colorectal cancer: the 'RASCAL II' study. Br J Cancer 2001; 85:692-6. [PMID: 11531254 PMCID: PMC2364126 DOI: 10.1054/bjoc.2001.1964] [Citation(s) in RCA: 650] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Researchers worldwide with information about the Kirsten ras (Ki-ras) tumour genotype and outcome of patients with colorectal cancer were invited to provide that data in a schematized format for inclusion in a collaborative database called RASCAL (The Kirsten ras in-colorectal-cancer collaborative group). Our results from 2721 such patients have been presented previously and for the first time in any common cancer, showed conclusively that different gene mutations have different impacts on outcome, even when the mutations occur at the same site on the genome. To explore the effect of Ki-ras mutations at different stages of colorectal cancer, more patients were recruited to the database, which was reanalysed when information on 4268 patients from 42 centres in 21 countries had been entered. After predetermined exclusion criteria were applied, data on 3439 patients were entered into a multivariate analysis. This found that of the 12 possible mutations on codons 12 and 13 of Kirsten ras, only one mutation on codon 12, glycine to valine, found in 8.6% of all patients, had a statistically significant impact on failure-free survival (P = 0.004, HR 1.3) and overall survival (P = 0.008, HR 1.29). This mutation appeared to have a greater impact on outcome in Dukes' C cancers (failure-free survival, P = 0.008, HR 1.5; overall survival P = 0.02, HR 1.45) than in Dukes' B tumours (failure-free survival, P = 0.46, HR 1.12; overall survival P = 0.36, HR 1.15). Ki-ras mutations may occur early in the development of pre-cancerous adenomas in the colon and rectum. However, this collaborative study suggests that not only is the presence of a codon 12 glycine to valine mutation important for cancer progression but also that it may predispose to more aggressive biological behaviour in patients with advanced colorectal cancer.
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Affiliation(s)
- H J Andreyev
- Department of Medicine & Therapeutics, Imperial College School of Medicine, Chelsea & Westminster Hospital, 369 Fulham Road, London, SW10 9NH, UK
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