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Abdelfattah AS, Ahuja S, Akkin T, Allu SR, Brake J, Boas DA, Buckley EM, Campbell RE, Chen AI, Cheng X, Čižmár T, Costantini I, De Vittorio M, Devor A, Doran PR, El Khatib M, Emiliani V, Fomin-Thunemann N, Fainman Y, Fernandez-Alfonso T, Ferri CGL, Gilad A, Han X, Harris A, Hillman EMC, Hochgeschwender U, Holt MG, Ji N, Kılıç K, Lake EMR, Li L, Li T, Mächler P, Miller EW, Mesquita RC, Nadella KMNS, Nägerl UV, Nasu Y, Nimmerjahn A, Ondráčková P, Pavone FS, Perez Campos C, Peterka DS, Pisano F, Pisanello F, Puppo F, Sabatini BL, Sadegh S, Sakadzic S, Shoham S, Shroff SN, Silver RA, Sims RR, Smith SL, Srinivasan VJ, Thunemann M, Tian L, Tian L, Troxler T, Valera A, Vaziri A, Vinogradov SA, Vitale F, Wang LV, Uhlířová H, Xu C, Yang C, Yang MH, Yellen G, Yizhar O, Zhao Y. Neurophotonic tools for microscopic measurements and manipulation: status report. Neurophotonics 2022; 9:013001. [PMID: 35493335 PMCID: PMC9047450 DOI: 10.1117/1.nph.9.s1.013001] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Neurophotonics was launched in 2014 coinciding with the launch of the BRAIN Initiative focused on development of technologies for advancement of neuroscience. For the last seven years, Neurophotonics' agenda has been well aligned with this focus on neurotechnologies featuring new optical methods and tools applicable to brain studies. While the BRAIN Initiative 2.0 is pivoting towards applications of these novel tools in the quest to understand the brain, this status report reviews an extensive and diverse toolkit of novel methods to explore brain function that have emerged from the BRAIN Initiative and related large-scale efforts for measurement and manipulation of brain structure and function. Here, we focus on neurophotonic tools mostly applicable to animal studies. A companion report, scheduled to appear later this year, will cover diffuse optical imaging methods applicable to noninvasive human studies. For each domain, we outline the current state-of-the-art of the respective technologies, identify the areas where innovation is needed, and provide an outlook for the future directions.
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Affiliation(s)
- Ahmed S. Abdelfattah
- Brown University, Department of Neuroscience, Providence, Rhode Island, United States
| | - Sapna Ahuja
- University of Pennsylvania, Perelman School of Medicine, Department of Biochemistry and Biophysics, Philadelphia, Pennsylvania, United States
- University of Pennsylvania, School of Arts and Sciences, Department of Chemistry, Philadelphia, Pennsylvania, United States
| | - Taner Akkin
- University of Minnesota, Department of Biomedical Engineering, Minneapolis, Minnesota, United States
| | - Srinivasa Rao Allu
- University of Pennsylvania, Perelman School of Medicine, Department of Biochemistry and Biophysics, Philadelphia, Pennsylvania, United States
- University of Pennsylvania, School of Arts and Sciences, Department of Chemistry, Philadelphia, Pennsylvania, United States
| | - Joshua Brake
- Harvey Mudd College, Department of Engineering, Claremont, California, United States
| | - David A. Boas
- Boston University, Department of Biomedical Engineering, Boston, Massachusetts, United States
| | - Erin M. Buckley
- Georgia Institute of Technology and Emory University, Wallace H. Coulter Department of Biomedical Engineering, Atlanta, Georgia, United States
- Emory University, Department of Pediatrics, Atlanta, Georgia, United States
| | - Robert E. Campbell
- University of Tokyo, Department of Chemistry, Tokyo, Japan
- University of Alberta, Department of Chemistry, Edmonton, Alberta, Canada
| | - Anderson I. Chen
- Boston University, Department of Biomedical Engineering, Boston, Massachusetts, United States
| | - Xiaojun Cheng
- Boston University, Department of Biomedical Engineering, Boston, Massachusetts, United States
| | - Tomáš Čižmár
- Institute of Scientific Instruments of the Czech Academy of Sciences, Brno, Czech Republic
| | - Irene Costantini
- University of Florence, European Laboratory for Non-Linear Spectroscopy, Department of Biology, Florence, Italy
- National Institute of Optics, National Research Council, Rome, Italy
| | - Massimo De Vittorio
- Istituto Italiano di Tecnologia, Center for Biomolecular Nanotechnologies, Arnesano, Italy
| | - Anna Devor
- Boston University, Department of Biomedical Engineering, Boston, Massachusetts, United States
- Massachusetts General Hospital, Harvard Medical School, Athinoula A. Martinos Center for Biomedical Imaging, Charlestown, Massachusetts, United States
| | - Patrick R. Doran
- Boston University, Department of Biomedical Engineering, Boston, Massachusetts, United States
| | - Mirna El Khatib
- University of Pennsylvania, Perelman School of Medicine, Department of Biochemistry and Biophysics, Philadelphia, Pennsylvania, United States
- University of Pennsylvania, School of Arts and Sciences, Department of Chemistry, Philadelphia, Pennsylvania, United States
| | | | - Natalie Fomin-Thunemann
- Boston University, Department of Biomedical Engineering, Boston, Massachusetts, United States
| | - Yeshaiahu Fainman
- University of California San Diego, Department of Electrical and Computer Engineering, La Jolla, California, United States
| | - Tomas Fernandez-Alfonso
- University College London, Department of Neuroscience, Physiology and Pharmacology, London, United Kingdom
| | - Christopher G. L. Ferri
- University of California San Diego, Departments of Neurosciences, La Jolla, California, United States
| | - Ariel Gilad
- The Hebrew University of Jerusalem, Institute for Medical Research Israel–Canada, Department of Medical Neurobiology, Faculty of Medicine, Jerusalem, Israel
| | - Xue Han
- Boston University, Department of Biomedical Engineering, Boston, Massachusetts, United States
| | - Andrew Harris
- Weizmann Institute of Science, Department of Brain Sciences, Rehovot, Israel
| | | | - Ute Hochgeschwender
- Central Michigan University, Department of Neuroscience, Mount Pleasant, Michigan, United States
| | - Matthew G. Holt
- University of Porto, Instituto de Investigação e Inovação em Saúde (i3S), Porto, Portugal
| | - Na Ji
- University of California Berkeley, Department of Physics, Berkeley, California, United States
| | - Kıvılcım Kılıç
- Boston University, Department of Biomedical Engineering, Boston, Massachusetts, United States
| | - Evelyn M. R. Lake
- Yale School of Medicine, Department of Radiology and Biomedical Imaging, New Haven, Connecticut, United States
| | - Lei Li
- California Institute of Technology, Andrew and Peggy Cherng Department of Medical Engineering, Department of Electrical Engineering, Pasadena, California, United States
| | - Tianqi Li
- University of Minnesota, Department of Biomedical Engineering, Minneapolis, Minnesota, United States
| | - Philipp Mächler
- Boston University, Department of Biomedical Engineering, Boston, Massachusetts, United States
| | - Evan W. Miller
- University of California Berkeley, Departments of Chemistry and Molecular & Cell Biology and Helen Wills Neuroscience Institute, Berkeley, California, United States
| | | | | | - U. Valentin Nägerl
- Interdisciplinary Institute for Neuroscience University of Bordeaux & CNRS, Bordeaux, France
| | - Yusuke Nasu
- University of Tokyo, Department of Chemistry, Tokyo, Japan
| | - Axel Nimmerjahn
- Salk Institute for Biological Studies, Waitt Advanced Biophotonics Center, La Jolla, California, United States
| | - Petra Ondráčková
- Institute of Scientific Instruments of the Czech Academy of Sciences, Brno, Czech Republic
| | - Francesco S. Pavone
- National Institute of Optics, National Research Council, Rome, Italy
- University of Florence, European Laboratory for Non-Linear Spectroscopy, Department of Physics, Florence, Italy
| | - Citlali Perez Campos
- Columbia University, Zuckerman Mind Brain Behavior Institute, New York, United States
| | - Darcy S. Peterka
- Columbia University, Zuckerman Mind Brain Behavior Institute, New York, United States
| | - Filippo Pisano
- Istituto Italiano di Tecnologia, Center for Biomolecular Nanotechnologies, Arnesano, Italy
| | - Ferruccio Pisanello
- Istituto Italiano di Tecnologia, Center for Biomolecular Nanotechnologies, Arnesano, Italy
| | - Francesca Puppo
- University of California San Diego, Departments of Neurosciences, La Jolla, California, United States
| | - Bernardo L. Sabatini
- Harvard Medical School, Howard Hughes Medical Institute, Department of Neurobiology, Boston, Massachusetts, United States
| | - Sanaz Sadegh
- University of California San Diego, Departments of Neurosciences, La Jolla, California, United States
| | - Sava Sakadzic
- Massachusetts General Hospital, Harvard Medical School, Athinoula A. Martinos Center for Biomedical Imaging, Charlestown, Massachusetts, United States
| | - Shy Shoham
- New York University Grossman School of Medicine, Tech4Health and Neuroscience Institutes, New York, New York, United States
| | - Sanaya N. Shroff
- Boston University, Department of Biomedical Engineering, Boston, Massachusetts, United States
| | - R. Angus Silver
- University College London, Department of Neuroscience, Physiology and Pharmacology, London, United Kingdom
| | - Ruth R. Sims
- Sorbonne University, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Spencer L. Smith
- University of California Santa Barbara, Department of Electrical and Computer Engineering, Santa Barbara, California, United States
| | - Vivek J. Srinivasan
- New York University Langone Health, Departments of Ophthalmology and Radiology, New York, New York, United States
| | - Martin Thunemann
- Boston University, Department of Biomedical Engineering, Boston, Massachusetts, United States
| | - Lei Tian
- Boston University, Departments of Electrical Engineering and Biomedical Engineering, Boston, Massachusetts, United States
| | - Lin Tian
- University of California Davis, Department of Biochemistry and Molecular Medicine, Davis, California, United States
| | - Thomas Troxler
- University of Pennsylvania, Perelman School of Medicine, Department of Biochemistry and Biophysics, Philadelphia, Pennsylvania, United States
- University of Pennsylvania, School of Arts and Sciences, Department of Chemistry, Philadelphia, Pennsylvania, United States
| | - Antoine Valera
- University College London, Department of Neuroscience, Physiology and Pharmacology, London, United Kingdom
| | - Alipasha Vaziri
- Rockefeller University, Laboratory of Neurotechnology and Biophysics, New York, New York, United States
- The Rockefeller University, The Kavli Neural Systems Institute, New York, New York, United States
| | - Sergei A. Vinogradov
- University of Pennsylvania, Perelman School of Medicine, Department of Biochemistry and Biophysics, Philadelphia, Pennsylvania, United States
- University of Pennsylvania, School of Arts and Sciences, Department of Chemistry, Philadelphia, Pennsylvania, United States
| | - Flavia Vitale
- Center for Neuroengineering and Therapeutics, Departments of Neurology, Bioengineering, Physical Medicine and Rehabilitation, Philadelphia, Pennsylvania, United States
| | - Lihong V. Wang
- California Institute of Technology, Andrew and Peggy Cherng Department of Medical Engineering, Department of Electrical Engineering, Pasadena, California, United States
| | - Hana Uhlířová
- Institute of Scientific Instruments of the Czech Academy of Sciences, Brno, Czech Republic
| | - Chris Xu
- Cornell University, School of Applied and Engineering Physics, Ithaca, New York, United States
| | - Changhuei Yang
- California Institute of Technology, Departments of Electrical Engineering, Bioengineering and Medical Engineering, Pasadena, California, United States
| | - Mu-Han Yang
- University of California San Diego, Department of Electrical and Computer Engineering, La Jolla, California, United States
| | - Gary Yellen
- Harvard Medical School, Department of Neurobiology, Boston, Massachusetts, United States
| | - Ofer Yizhar
- Weizmann Institute of Science, Department of Brain Sciences, Rehovot, Israel
| | - Yongxin Zhao
- Carnegie Mellon University, Department of Biological Sciences, Pittsburgh, Pennsylvania, United States
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Li XM, Li YY, Zhao CF, Liu LN, He QY, Jiang JQ, Chen Y, Yang MH, Tang YX, Li YX, Jin F. [The expression of clock gene CLOCK and its clinical significance in nasopharyngeal carcinoma]. Zhonghua Zhong Liu Za Zhi 2021; 43:1255-1263. [PMID: 34915633 DOI: 10.3760/cma.j.cn112152-20210729-00558] [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 explore the relationship between expression levels of CLOCK mRNA and protein and the clinical characteristics of patients with nasopharyngeal carcinoma. Methods: The frozen tissue specimens from 33 patients with nasopharyngeal carcinoma in the Affiliated Tumor Hospital of Guizhou Medical University from 2018 to 2019 were collected. Seventeen cases of tissue specimens from patients with nasopharyngeal chronic inflammation in the Affiliated Hospital of Guizhou Medical University in 2019 were collected. From 2008 to 2014, 68 cases of formalin-fixed paraffin-embedding (FFPE) nasopharyngeal carcinoma tissue and 37 cases of FFPE nasopharyngeal chronic inflammation tissue were collected from the Affiliated Tumor Hospital of Guizhou Medical University. Real-time quantitative reverse transcription polymerase chain reaction (qRT-PCR) and western blot (WB) were used to detect the mRNA and protein expression levels of CLOCK. The nasopharyngeal carcinoma cells including CNE1, CNE2, 5-8F and the normal nasopharyngeal epithelial cell NP69 were cultured. qRT-PCR was used to detect the expression level of CLOCK mRNA in each cell line at the time points of ZT2, ZT6, ZT10, ZT14, ZT18 and ZT22. The cosine method was used to fit the rhythm of CLOCK gene in nasopharyngeal carcinoma. The protein expression of CLOCK protein was detected by using immunohistochemical method in 68 cases of nasopharyngeal carcinoma and 37 cases of nasopharyngeal chronic inflammation tissue. Survival was analyzed by Kaplan-Meier method and Log rank test, and the influencing factors was analyzed by Cox regression model. Results: The expression levels of CLOCK mRNA in CNE1, CNE2 and 5-8F cells (0.63±0.07, 0.91±0.02 and 0.33±0.04, respectively) were lower than that in NP69 cell (1.00±0.00, P<0.05). The expression levels of CLOCK protein in CNE1, CNE2 and 5-8F cells (0.79±0.06, 0.57±0.05 and 0.74±0.10, respectively) were lower than that of NP69 cells (1.00±0.00, P<0.05). The expressions of CLOCK mRNA in nasopharyngeal carcinoma cells including CEN1, CNE2, 5-8F and normal nasopharyngeal epithelial cell NP69 were different at different time points, with temporal fluctuations. The fluctuation periods of CLOCK mRNA in CNE1, CNE2, 5-8F, and NP69 cells were 16, 14, 22 and 24 hours, respectively. The peak and trough times were ZT10: 40 and ZT18: 40, ZT10 and ZT3, ZT14: 30 and ZT3: 30, ZT12: 39 and ZT0: 39, respectively. CLOCK mRNA and protein expression levels in nasopharyngeal carcinoma tissues (0.37±0.20 and 0.20±0.26, respectively) were lower than those in nasopharyngeal chronic inflammation tissues (1.00±0.00 and 0.51±0.41, respectively, P<0.05). The 1, 3, and 5-year survival rates of patients in the CLOCK protein high expression group (CLOCK protein expression level ≥ 0.178) were 96.2%, 92.1%, and 80.1%, respectively, which were higher than those in the low expression group (CLOCK protein expression level <0.178, 92.9% , 78.6% and 57.1%, respectively, P=0.009). The 1, 3, and 5-year progression-free survival (PFS) rates of patients in the CLOCK protein high expression group were 96.2%, 87.8%, and 87.7%, respectively, which were higher than those in the low expression group (92.7%, 82.2%, and 70.8%, respectively, P=0.105). Compared with the low-expression group (100.0%, 96.9%, and 90.0%, respectively), the 1, 3, and 5-year recurrence-free survival rates of patients in the CLOCK protein high expression group (100.0%, 95.7%, and 95.7%, respectively) were not statistically significant (P=0.514). Compared with the low-expression group (92.7%, 82.2%, and 79.3%), the 1, 3, and 5-year survival rates without metastasis in the CLOCK protein high expression group (96.2%, 92.0%, and 92.0%, respectively) were not statistically significant (P=0.136). CLOCK protein expression and T stage were independent prognostic factors of overall survival (P<0.05). Conclusions: The expression of CLCOK is downregulated in the nasopharyngeal carcinoma cell and nasopharyngeal carcinoma tissues. Clock gene CLOCK is rhythmically expressed in the nasopharyngeal carcinoma cells and normal nasopharyngeal epithelial cells. Compared with normal nasopharyngeal epithelial cells, the fluctuation period of CLOCK in nasopharyngeal carcinoma cells is shortened. The overall survival of patients in the CLOCK protein high expression group is better than that of low expression group. The expression of CLOCK protein is an independent influencing factor for overall survival. CLOCK gene may be a potential tumor suppressor gene in the nasopharyngeal carcinoma.
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Affiliation(s)
- X M Li
- Department of Oncology, Affiliated Tumor Hospital of Guizhou Medical University, Guiyang 550004, China
| | - Y Y Li
- Department of Oncology, Affiliated Hospital of Guizhou Medical University, Guiyang 550004, China
| | - C F Zhao
- Department of Oncology, Affiliated Hospital of Guizhou Medical University, Guiyang 550004, China
| | - L N Liu
- Department of Oncology, Affiliated Hospital of Guizhou Medical University, Guiyang 550004, China
| | - Q Y He
- Department of Oncology, Affiliated Hospital of Guizhou Medical University, Guiyang 550004, China
| | - J Q Jiang
- Department of Oncology, Affiliated Tumor Hospital of Guizhou Medical University, Guiyang 550004, China
| | - Y Chen
- Department of Oncology, Affiliated Tumor Hospital of Guizhou Medical University, Guiyang 550004, China
| | - M H Yang
- Guizhou Medical University School of Clinical Medicine, Guiyang 550004, China
| | - Y X Tang
- Guizhou Medical University School of Clinical Medicine, Guiyang 550004, China
| | - Y X Li
- Guizhou Medical University School of Clinical Medicine, Guiyang 550004, China
| | - F Jin
- Department of Oncology, Affiliated Hospital of Guizhou Medical University, Guiyang 550004, China
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Yan L, Zheng MC, Ju XL, Hu SY, Jin RM, Guo BY, Yang MH. [Clinical analysis of 14 cases with childhood acute lymphoblastic leukemia complicated with tropical candidemia]. Zhonghua Er Ke Za Zhi 2020; 58:813-817. [PMID: 32987460 DOI: 10.3760/cma.j.cn112140-20200323-00298] [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 investigate the clinical feature, diagnosis, treatment and prognosis of childhood acute lymphoblastic leukemia (ALL) complicated with candida tropicalis bloodstream infection (CTBI), so as to improve the understanding of this disease. Methods: The general information, clinical manifestation, auxiliary examination, treatment and outcome of 14 childhood ALL who were diagnosed with tropical candidemia between January 2015 and December 2018 in 6 hospitals were analyzed retrospectively. Clinical data of non invasive fungal disease (IFD) ALL (28 cases) and other IFD children (9 cases) admitted in the same period were collected as control group. Logistic regression model was used to analyze the risk factor of CTBI. Results: Among 14 cases, there were 7 males and 7 females, with the age ranged from 17 months to 13 years. All the cases had fever, 9 cases had digestive system symptoms and stool fungal culture were positive in 3 of them; 7 cases had respiratory system symptoms and sputum fungal culture was positive in 1 of them; 2 cases had central nervous system symptoms and 10 cases progressed into septic shock. All 14 cases had neutropenia and the neutropenia duration was 1 to 53 days. Among 14 cases, the C-reactive protein was>50 mg/L in 8 cases, in which the proportion was significantly higher than that in other invasive fungal disease(IFD) (8/14 vs. 1/9, P<0.05), meanwhile the 1, 3-β-D-glucan detection, galactomannan detection and pulmonary imaging were not remarkable in all 14 cases. The blood culture results of 14 cases were all candida tropicalis, among which 13 cases finished drug susceptibility tests, the isolates of all cases were sensitive to flucytosine and amphotericin B, and the isolates of 4 cases were sensitive to fluconazole, voriconazole and itraconazole. Among 14 cases, 1 case lost to follow-up after giving up treatment, 1 case died before antifungal therapy and the remaining 12 cases received antifungal therapy; 7 of the 14 cases died. Univariate analysis showed that between ALL with CTBI group (14 cases) and ALL without invasive fungal disease (IFD) group (28 cases), the differences in variables such as ALL not in remission (χ²=37.847, P<0.01), length of hospital stay>15 days (χ2=8.351, P=0.004), neutropenia (χ²=14.280, P<0.01), neutropenia duration>10 days (χ²=10.254, P=0.001), use of broad-spectrum antibiotics (χ²=13.888, P<0.01), skin and mucous membrane damage (χ²= 5.923, P=0.015) were statistically significant. Conclusions: In childhood ALL complicated with tropical candidemia, the drug resistance rate and mortality rate were high. For azole-resistant tropical candida, amphotericin B liposome or echinocandins(caspofungin) -fluorocytosine combined therapy was recommended to reduce treatment-related deaths.
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Affiliation(s)
- L Yan
- Department of Pediatrics, Xiangya Hospital, Central South University, Changsha 410008, China
| | - M C Zheng
- Department of Hematology, Hunan Provincial Children's Hospital, Changsha 410007, China
| | - X L Ju
- Department of Pediatrics, Qilu Hospital of Shandong University, Jinan 250012, China
| | - S Y Hu
- Department of Hematology, Children's Hospital Affiliated to Soochow University, Suzhou 215000, China
| | - R M Jin
- Department of Pediatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - B Y Guo
- Department of Pediatrics, the First Affiliated Hospital of Xiamen University, Xiamen 361000, China
| | - M H Yang
- Department of Pediatrics, the Third Xiangya Hospital of Central South University, Changsha 410013, China
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Sadegh S, Yang MH, Ferri C, Thunemann M, Devor A, Fainman Y. Advantages of Non-degenerate Two-photon Microscopy for Deep Tissue Imaging. Biophys J 2020. [DOI: 10.1016/j.bpj.2019.11.1752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Sadegh S, Yang MH, Ferri CGL, Thunemann M, Saisan PA, Wei Z, Rodriguez EA, Adams SR, Kiliç K, Boas DA, Sakadžić S, Devor A, Fainman Y. Efficient non-degenerate two-photon excitation for fluorescence microscopy. Opt Express 2019; 27:28022-28035. [PMID: 31684560 PMCID: PMC6825618 DOI: 10.1364/oe.27.028022] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Non-degenerate two-photon excitation (ND-TPE) has been explored in two-photon excitation microscopy. However, a systematic study of the efficiency of ND-TPE to guide the selection of fluorophore excitation wavelengths is missing. We measured the relative non-degenerate two-photon absorption cross-section (ND-TPACS) of several commonly used fluorophores (two fluorescent proteins and three small-molecule dyes) and generated 2-dimensional ND-TPACS spectra. We observed that the shape of a ND-TPACS spectrum follows that of the corresponding degenerate two-photon absorption cross-section (D-TPACS) spectrum, but is higher in magnitude. We found that the observed enhancements are higher than theoretical predictions.
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Affiliation(s)
- Sanaz Sadegh
- Department of Neurosciences, University of California, San Diego, CA 92093, USA
- These authors contributed equally to this study
| | - Mu-Han Yang
- Electrical and Computer Engineering Graduate Program, UCSD, La Jolla, CA 92093, USA
- These authors contributed equally to this study
| | - Christopher G. L. Ferri
- Department of Neurosciences, University of California, San Diego, CA 92093, USA
- These authors contributed equally to this study
| | - Martin Thunemann
- Department of Neurosciences, University of California, San Diego, CA 92093, USA
| | - Payam A. Saisan
- Department of Neurosciences, University of California, San Diego, CA 92093, USA
| | - Zhe Wei
- Bioengineering Undergraduate Program, UCSD, La Jolla, CA 92093, USA
| | - Erik A. Rodriguez
- Department of Chemistry, The George Washington University, Washington, DC 20052, USA
| | - Stephen R. Adams
- Department of Pharmacology, University of California, San Diego, CA 92093, USA
| | - Kivilcim Kiliç
- Department of Neurosciences, University of California, San Diego, CA 92093, USA
| | - David A. Boas
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA
| | - Sava Sakadžić
- Martinos Center for Biomedical Imaging, MGH, Harvard Medical School, Charlestown, MA 02129, USA
| | - Anna Devor
- Department of Neurosciences, University of California, San Diego, CA 92093, USA
- Martinos Center for Biomedical Imaging, MGH, Harvard Medical School, Charlestown, MA 02129, USA
- Department of Radiology, University of California, San Diego, CA 92093, USA
- These senior authors equally contributed to this study
| | - Yeshaiahu Fainman
- Electrical and Computer Engineering Graduate Program, UCSD, La Jolla, CA 92093, USA
- These senior authors equally contributed to this study
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Li WJ, Li T, Sun X, Sun ZJ, Yang MH, Wu XB. [Postoperative distal tibiofibular synostosis: radiographic characteristics and the influence on ankle mobility]. Zhonghua Yi Xue Za Zhi 2019; 99:1621-1625. [PMID: 31189259 DOI: 10.3760/cma.j.issn.0376-2491.2019.21.006] [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 investigate the clinical and imaging characteristics of distal tibiofibular synostosis in postoperative ankle fractures and its effects on the ankle mobility. Methods: The clinical and imaging data of 47 patients with distal tibiofibular synostosis treated surgically from October 1991 to June 2013 were analyzed retrospectively. There were 30 males and 17 females, aged from 15 to 68 years with a mean age of (39±13) years. The original fracture types, internal fixation profiles, imaging features of distal tibiofibular synostosis were recorded. Ankle range of motion (ROM) and complications at the last follow-up were also evaluated.The ROMs of healthy and fractured sides were compared with paired sample rank test. Results: The patients were followed up for 3 to 204 months (mean 25.4 months). Of the patients, 34(72.4%) were ankle fractures, 7(14.9%) were distal tibiofibular fractures, 1(2.1%) was tibiofibular shaft fracture, 2(4.3%) were tibial shaft fractures associated with lateral malleolus fracture and the resting 3(6.4%) were Pilon fractures. In patients with ankle fractures, 76.5%(26/34) of the synostosis occurred at the distal tibiofibular syndesmosis, while 23.5%(8/34) at the proximal of the tibiofibular sydesmosis; in patients with distal tibiofibular fracture, 85.7%(6/7) of the tibiofibular synostoses occurred at the fracture sites. The synostosis occurred at the level of syndesmotic screws in 8 patients (88.9%, 8/9) fixed with distal tibiofibular syndesmotic screws. And synostosis occurred at the sites of the distal locking screws in all (3/3) of the patients fixed with intramedullary nails. At the last follow-up, the active plantarflexion, active dorsiflexion and passive dorsiflexion in the affected side was 0°(0°, 5°), 2°(0°, 5°), 5°(0°, 10°) less than those in the healthy side, respectively (Z=-3.493, -4.491, -5.130, all P<0.05).During the follow-up, 4 patients complained of lateral ankle discomfort with no impact on daily life. Conclusions: Post-operative distal tibiofibular synostosis mainly occurs at the sites of fractures, distal tibiofibular syndesmotic screw sites and the sites of the distal locking screws of tibial intramedullary nails. ROM of the injured ankle decreases in comparison with that at the contralateral side, although no obvious symptoms are observed and no intervention needed.
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Affiliation(s)
- W J Li
- Department of Orthopaedic Trauma, Beijing Jishuitan Hospital (the 4th Medical College, Peking University), Beijing 100035, China
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Sadegh S, Yang MH, Ferri CGL, Thunemann M, Saisan PA, Devor A, Fainman Y. Measurement of the relative non-degenerate two-photon absorption cross-section for fluorescence microscopy. Opt Express 2019; 27:8335-8347. [PMID: 31052653 PMCID: PMC6825612 DOI: 10.1364/oe.27.008335] [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] [Indexed: 05/05/2023]
Abstract
In non-degenerate two-photon microscopy (ND-TPM), the required energy for fluorescence excitation occurs via absorption of two photons of different energies derived from two synchronized pulsed laser beams. ND-TPM is a promising imaging technology offering flexibility in the choice of the photon energy for each beam. However, a formalism to quantify the efficiency of two-photon absorption (TPA) under non-degenerate excitation, relative to the resonant degenerate excitation, is missing. Here, we derive this formalism and experimentally validate our prediction for a common fluorophore, fluorescein. An accurate quantification of non-degenerate TPA is important to optimize the choice of photon energies for each fluorophore.
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Affiliation(s)
- Sanaz Sadegh
- Department of Neurosciences, University of California, San Diego, CA 92093,
USA
| | - Mu-Han Yang
- Electrical and Computer Engineering Graduate Program, UCSD, La Jolla, CA 92093,
USA
| | | | - Martin Thunemann
- Department of Neurosciences, University of California, San Diego, CA 92093,
USA
| | - Payam A. Saisan
- Department of Neurosciences, University of California, San Diego, CA 92093,
USA
| | - Anna Devor
- Department of Neurosciences, University of California, San Diego, CA 92093,
USA
- Department of Radiology, UCSD, La Jolla, CA 92093,
USA
- Martinos Center for Biomedical Imaging, MGH, Harvard Medical School, Charlestown, MA 02129,
USA
| | - Yeshaiahu Fainman
- Department of Electrical and Computer Engineering, UCSD, La Jolla, CA 92093,
USA
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8
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Qu ZQ, Yang MH, Du MY, Ma C, Tao YP, Chen Z, Liang K, Ma RM. [Outcome of vaginal birth after cesarean section in women with advanced maternal age]. Zhonghua Fu Chan Ke Za Zhi 2018; 52:521-525. [PMID: 28851168 DOI: 10.3760/cma.j.issn.0529-567x.2017.08.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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 explore the perinatal outcome of vaginal birth after cesarean (VBAC) in women with advanced age. Methods: Totally 2 587 women delivered after one or two prior cesarean sections (gestational age≥28 weeks) in the First Affiliated Hospital of Kunming Medical University from July 2013 to February 2017. 909 trial of labor after cesarean(TOLAC) cases of singleton pregnancy with one prior cesarean section were studied retrospectively. According to the age, of the 909 TOLAC cases, 237 were the advanced age group, and 672 cases were the low age group. The maternal and neonatal outcomes between the two groups were compared. Results: The percentage of TOLAC in women with advanced age was 32.4% (237/731), and VBAC rate was 88.2% (209/237). The percentage of TOLAC in younger women was 36.2% (672/1 856), and VBAC rate was 82.4% (554/672). The difference of the TOLAC rate between the two groups was not significant (P>0.05), and the VBAC rate of the advanced age group was higher than the low age group (P<0.05). In the comparison of the two groups, the proportion of bachelor degree or above(55.7%,132/237), the prepregnancy BMI (22.4±3.0) kg/m(2), pregnant interval time (68.5±38.3) months, the proportion of gestational hypertension (8.4%,20/237), the proportion of gestational diabetes(34.6%,82/237) and the rate of the neonatal ICU admission (18.1%,43/237) in the advanced age group were higher than those of the low age group (P<0.05), respectively. And there were no significant differences in the rate of postpartum hemorrhage, the rate of postpartum hemorrhage≥1 500 ml, the rate of postpartum transfusion, puerperal morbidity, neonatal birth weight, neonatal 5 min Apgar score<7 score, umbilical artery blood pH<7.0, neonatal tracheal intubation and respiratory distress syndrome (all P>0.05). In all TOLAC cases, the rate of uterine rupture was 0.11%(1/909) and there was no maternal and neonatal death. Conclusion: VBAC is a safe and feasible way of delivery for singleton pregnancy after one prior cesarean section in women with advanced age.
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Affiliation(s)
- Z Q Qu
- Department of Obstetrics and Gynecology, the First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
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9
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Sun X, Li T, Sun ZJ, Li SL, Sun N, Cao QY, Li N, Yang MH, Zhu SW, Wu Y, Wu XB. [Deltoid ligament augmentation and repairing in ankle fracture associated with deltoid ligament injury and syndesmosis diastasis]. Zhonghua Yi Xue Za Zhi 2018; 98:3192-3196. [PMID: 30392281 DOI: 10.3760/cma.j.issn.0376-2491.2018.39.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To evaluate the outcome of the deep component augmentation and superficial component repairing and syndesmosis screw fixation in treating ankle fracture associated with deltoid ligament injury and syndesmosis diastasis. Methods: From January 2014 to December 2017, 16 patients with ankle fracture combined with deltoid ligament injury and syndesmosis diastasis were treated with the deep component augmentation and superficial component repairing in Beijing Jishuitan Hospital.Of the patients, 13 were males and 3 were females, with an average age of (38±10) years (21-57 years). Nine cases were athletic injuries, 4 cases were daily-life injuries and 3 cases were traffic injuries.According to the Weber classification, 6 cases were type B, 10 cases were type C. According to the Lauge-Hansen classification, 6 cases were supination external rotation Ⅳ injury, 9 cases were pronation external rotation Ⅳ injury, 1 case was pronation abduction Ⅲ injury.The surgical treatment method was rigid fixation of the lateral malleolus and deep deltoid ligament augamentation instead of syndesmosis screw fixation.The effect of the surgical method was observed. Results: The average follow up was (24±12) months (6-40 months). The mean degree of dorsiflexion was 17.8°±6.8° (5°-30°), with 3.8°±6.0° (0°-15°) less than that in normal side, the mean degree of plantar flexion was 46.9°±7.9°, with 1.9°±3.9° (0°-10°) less than that in normal side.The mean Philips and Schwartz score was 96.8±5.1 (82-100), the American Orthopaedic Foot and Ankle Society (AOFAS) Score was 97.4±4.6 (84-100). Conclusion: In the treatment of ankle fracture associated with deltoid ligament injury and syndesmosis diastasis, the deep component augmentation and superficial component repairing and proper rehabilitation can benefit the functional recovery.
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10
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Lin HH, Vallini F, Yang MH, Sharma R, Puckett MW, Montoya S, Wurm CD, Fullerton EE, Fainman Y. Electronic Metamaterials with Tunable Second-order Optical Nonlinearities. Sci Rep 2017; 7:9983. [PMID: 28855738 PMCID: PMC5577114 DOI: 10.1038/s41598-017-10304-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 08/07/2017] [Indexed: 12/03/2022] Open
Abstract
The ability to engineer metamaterials with tunable nonlinear optical properties is crucial for nonlinear optics. Traditionally, metals have been employed to enhance nonlinear optical interactions through field localization. Here, inspired by the electronic properties of materials, we introduce and demonstrate experimentally an asymmetric metal-semiconductor-metal (MSM) metamaterial that exhibits a large and electronically tunable effective second-order optical susceptibility (χ(2)). The induced χ(2) originates from the interaction between the third-order optical susceptibility of the semiconductor (χ(3)) with the engineered internal electric field resulting from the two metals possessing dissimilar work function at its interfaces. We demonstrate a five times larger second-harmonic intensity from the MSM metamaterial, compared to contributions from its constituents with electrically tunable nonlinear coefficient ranging from 2.8 to 15.6 pm/V. Spatial patterning of one of the metals on the semiconductor demonstrates tunable nonlinear diffraction, paving the way for all-optical spatial signal processing with space-invariant and -variant nonlinear impulse response.
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Affiliation(s)
- Hung-Hsi Lin
- Materials Science and Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California, 92093, USA
| | - Felipe Vallini
- Department of Electrical & Computer Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA
| | - Mu-Han Yang
- Department of Electrical & Computer Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA
| | - Rajat Sharma
- Department of Electrical & Computer Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA
| | - Matthew W Puckett
- Department of Electrical & Computer Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA
| | - Sergio Montoya
- Department of Electrical & Computer Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA.,Center for Memory and Recording Research, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0401, USA
| | - Christian D Wurm
- Department of Electrical & Computer Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA
| | - Eric E Fullerton
- Department of Electrical & Computer Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA.,Center for Memory and Recording Research, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0401, USA
| | - Yeshaiahu Fainman
- Department of Electrical & Computer Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA.
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11
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Fan JX, Li N, Gong XF, Yang MH, Zhu SW, Wu XB, He L. [Evaluation of the proximal femur geometry in patients with elderly osteoporotic hip fractures]. Zhonghua Yi Xue Za Zhi 2017; 97:2443-2446. [PMID: 28835046 DOI: 10.3760/cma.j.issn.0376-2491.2017.31.012] [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] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Objective: To investigate the relationship between the proximal femur geometry and elderly osteoporotic hip fractures. Methods: From May 2015 to December 2015, 137 patients with elderly osteoporotic hip fractures were involved.69 cases were in the fracture group and 68 cases were in the control group.CT scan were performed on all patients and the proximal femur geometry parameters were measured, including the neck width (NW), neck length (NL), neck shaft angle (NSA), femur head diameter (FHD), head height (HH) and Offset.Statistical analysis was performed between two groups. Results: The results of single factor analysis showed that age, sex, NL, FHD, NSA and Offset had significantly differences between two groups (P<0.05). The multiple Logistic regression analysis showed that age, sex, NL and NSA were independent risk factor for the hip fractures.The ROC curve analysis showed that area under curve (AUC) were 0.818, 0.818 and 0.725, respectively. Conclusions: The patients with older age, longer NL and larger NSA might be prone to hip fracture and it was an effective and feasible method to reconstruct and measure the CT data of the proximal femur with Mimics software.
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Affiliation(s)
- J X Fan
- Department of Orthopedic Trauma, Beijing Jishuitan Hospital, Beijing 100035, China
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12
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Qu ZQ, Ma RM, Xiao H, Tian YQ, Li BL, Liang K, Du MY, Chen Z, Geng L, Yang MH, Tao YP, Zhu B. [The outcome of trial of labor after cesarean section]. Zhonghua Fu Chan Ke Za Zhi 2017; 51:748-753. [PMID: 27788742 DOI: 10.3760/cma.j.issn.0529-567x.2016.10.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Objective: To explore the outcome of trial of labor after cesarean section(TOLAC). Methods: Totally 614 TOLAC were conducted in the First Affiliated Hospital of Kunming Medical University from July 2013 to June 2016. Among them, 586 cases of singleton pregnancy with one prior cesarean section(gestational age≥28 weeks)were studied retrospectively. The maternal and neonatal outcomes among the vaginal birth after cesarean(VBAC)group(481 cases), failed TOLAC group(105 cases)and the elective repeat cesarean section(ERCS)group(1 145 cases)were compared. Multiple logistic regression was used to determine the risk factors of admission to neonatal intensive care unit(NICU). Results: (1)The TOLAC rate was 29.62%(614/2 073)from July 2013 to June 2016, and the VBAC rate was 82.6%(507/614). The cesarean section rate was reduced by VBAC by 3.147%(507/16 112).(2)The comparison of adverse maternal outcomes: in the VBAC group, the postpartum hemorrhage volume was(431±299)ml, the rate of postpartum fever was 6.4%(31/481), the birth weight of the neonates was(3 085± 561)g, and the rate of large for gestational age was 2.9%(14/481). All were significantly lower than those in the failed TOLAC group and the ERCS group(P<0.05). There was no significant difference in other adverse maternal outcomes[the uterine rupture rate(0.2% ,1/481), the bladder injury rate(0), the proportion of postpartum hemorrhage volume≥1 500 ml(1.0%, 5/481), the blood transfusion rate(3.7%, 18/481)]and adverse perinatal outcomes[the rate of neonatal 5-minute Apgar score<7(0.4%, 21/481), the rate of umbilical arterial pH<7.0(0.6% , 3/481), the rate of the NICU admission and the perinatal mortality rate(12.3%, 59/481)]among the 3 groups(P>0.05). Multiple logistic regression showed no association between VBAC and admission to the NICU(OR=0.84, 95%CI: 0.58-1.21). The isolated risk factors for admission to the NICU were preterm birth(OR=16.71, 95% CI: 11.44-24.40), hypertensive disorder complicating pregnamcy(OR=3.89, 95% CI: 2.39-6.35), meconium stained amniotic fluid(OR=2.48, 95% CI: 1.62-3.80), small for gestational age(OR=2.00, 95% CI: 1.19-3.36)and diabetes mellitus(OR=1.69, 95% CI: 1.14-2.50). Conclusions: VBAC reduces cesarean section rate, with good outcomes in both mother and neonate. It is a safe and feasible way of labor in women with only one cesarean section history.
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Affiliation(s)
- Z Q Qu
- Department of Obstetrics and Gynecology, the First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
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13
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Yang MH, Abashin M, Saisan PA, Tian P, Ferri CGL, Devor A, Fainman Y. Non-degenerate 2-photon excitation in scattering medium for fluorescence microscopy. Opt Express 2016; 24:30173-30187. [PMID: 28059294 PMCID: PMC5234507 DOI: 10.1364/oe.24.030173] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 12/01/2016] [Accepted: 12/03/2016] [Indexed: 05/22/2023]
Abstract
Non-degenerate 2-photon excitation (ND-2PE) of a fluorophore with two laser beams of different photon energies offers an independent degree of freedom in tuning of the photon flux for each beam. This feature takes advantage of the infrared wavelengths used in degenerate 3-photon excitation (D-3PE) microscopy to achieve increased penetration depths, while preserving a relatively high 2-photon excitation cross section in comparison to that of D-3PE. Here, using spatially and temporally aligned Ti:Sapphire laser and optical parametric oscillator beams operating at near infrared (NIR) and short-wavelength infrared (SWIR) optical frequencies, we employ ND-2PE and provide a practical demonstration that a constant fluorophore emission intensity is achievable deeper into a scattering medium using ND-2PE as compared to the commonly used degenerate 2-photon excitation (D-2PE).
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Affiliation(s)
- Mu-Han Yang
- Department of Electrical and Computer Engineering, University of California, San Diego, CA 92093, USA
| | - Maxim Abashin
- Department of Electrical and Computer Engineering, University of California, San Diego, CA 92093, USA
| | - Payam A. Saisan
- Department of Neurosciences, University of California, San Diego, CA 92093, USA
| | - Peifang Tian
- Department of Neurosciences, University of California, San Diego, CA 92093, USA
- Department of Physics, John Carroll University, University Heights, OH 44118, USA
| | | | - Anna Devor
- Department of Neurosciences, University of California, San Diego, CA 92093, USA
- Department of Radiology, University of California, San Diego, CA 92093, USA
- Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, MA 02129, USA
| | - Yeshaiahu Fainman
- Department of Electrical and Computer Engineering, University of California, San Diego, CA 92093, USA
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14
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Smolyaninov A, Yang MH, Pang L, Fainman Y. Plasmonic enhanced two-photon absorption in silicon photodetectors for optical correlators in the near-infrared. Opt Lett 2016; 41:4445-4448. [PMID: 27749851 DOI: 10.1364/ol.41.004445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A high-density array of plasmonic coaxial nanoantennas is used to enhance the two-photon absorption (TPA) process in a conventional silicon photodetector from a mode-locked 76 MHz Ti:sapphire laser over a spectral range from 1340 to 1550 nm. This enhanced TPA was used to generate an interferometric autocorrelation trace of a 150 fs laser pulse. Unlike second-harmonic generation, this technique does not require phase matching or a bulky crystal and can be used on a low-cost integrated silicon platform over a wide range of near-IR wavelengths compatible with modern commercial tunable femtosecond sources.
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15
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Shen WH, Li ZH, Peng YH, Yang MH, Tan ZQ, Zheng W. Development and characterization of microsatellite loci in Excentrodendron hsienmu (Chun & How) H.T. Chang& R.H. Miau. Genet Mol Res 2016; 15:gmr8060. [PMID: 27706569 DOI: 10.4238/gmr.15038060] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Microsatellite markers were isolated using dual-suppression-PCR for the endangered species Excentrodendron hsienmu (Tiliaceae) to evaluate the genetic diversity and population structure of this species. A total of 11 polymorphic microsatellite loci were characterized in E. hsienmu. The number of alleles per locus ranged from 2 to 9, with an average of 5.27. The expected heterozygosity value ranged from 0.053 to 0.780, with an average of 0.568 and the observed heterozygosity value ranged from 0 to 0.595, with an average of 0.268. The polymorphic information content value ranged from 0.051 to 0.740, with an average of 0.521. These newly designed markers will be of great potential significance and profound influence in future research related to the genetic diversity, population structure, and patterns of gene flow of this species, which will contribute to the implementation of conservation and management strategies for this species.
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Affiliation(s)
- W H Shen
- Central South University of Forestry and Technology, Changsha, Hunan, China.,Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation, Guangxi Forestry Research Institute, anning, Guangxi, China.,Guangxi Forestry Research Institute, Nanning, Guangxi, China
| | - Z H Li
- Central South University of Forestry and Technology, Changsha, Hunan, China
| | - Y H Peng
- Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation, Guangxi Forestry Research Institute, anning, Guangxi, China.,Guangxi Forestry Research Institute, Nanning, Guangxi, China
| | - M H Yang
- Central South University of Forestry and Technology, Changsha, Hunan, China
| | - Z Q Tan
- Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation, Guangxi Forestry Research Institute, anning, Guangxi, China.,Guangxi Forestry Research Institute, Nanning, Guangxi, China
| | - W Zheng
- Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation, Guangxi Forestry Research Institute, anning, Guangxi, China.,Guangxi Forestry Research Institute, Nanning, Guangxi, China
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16
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Puckett MW, Sharma R, Lin HH, Yang MH, Vallini F, Fainman Y. Observation of second-harmonic generation in silicon nitride waveguides through bulk nonlinearities. Opt Express 2016; 24:16923-16933. [PMID: 27464144 DOI: 10.1364/oe.24.016923] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We present experimental results on the observation of a bulk second-order nonlinear susceptibility, derived from both free-space and integrated measurements, in silicon nitride. Phase-matching is achieved through dispersion engineering of the waveguide cross-section, independently revealing multiple components of the nonlinear susceptibility, namely χ(2) yyy = 0.14 ± 0.08 pm/V and χ(2) xxy = 0.30 ± 0.18 pm/V. Additionally, we show how the second-harmonic signal may be tuned through the application of bias voltages across silicon nitride. The material properties measured here are anticipated to allow for the realization of new nanophotonic devices in CMOS-compatible silicon nitride waveguides, adding to their viability for telecommunication, data communication, and optical signal processing applications.
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17
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Yang MH, Li JH, Liu BX. Proposed correlation of structure network inherited from producing techniques and deformation behavior for Ni-Ti-Mo metallic glasses via atomistic simulations. Sci Rep 2016; 6:29722. [PMID: 27418115 PMCID: PMC4945915 DOI: 10.1038/srep29722] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 06/22/2016] [Indexed: 02/04/2023] Open
Abstract
Based on the newly constructed n-body potential of Ni-Ti-Mo system, Molecular Dynamics and Monte Carlo simulations predict an energetically favored glass formation region and an optimal composition sub-region with the highest glass-forming ability. In order to compare the producing techniques between liquid melt quenching (LMQ) and solid-state amorphization (SSA), inherent hierarchical structure and its effect on mechanical property were clarified via atomistic simulations. It is revealed that both producing techniques exhibit no pronounced differences in the local atomic structure and mechanical behavior, while the LMQ method makes a relatively more ordered structure and a higher intrinsic strength. Meanwhile, it is found that the dominant short-order clusters of Ni-Ti-Mo metallic glasses obtained by LMQ and SSA are similar. By analyzing the structural evolution upon uniaxial tensile deformation, it is concluded that the gradual collapse of the spatial structure network is intimately correlated to the mechanical response of metallic glasses and acts as a structural signature of the initiation and propagation of shear bands.
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Affiliation(s)
- M H Yang
- Key Laboratory of Advanced Materials (MOE), School of Materials science and Engineering, Tsinghua University, Beijing 100084, China
| | - J H Li
- Key Laboratory of Advanced Materials (MOE), School of Materials science and Engineering, Tsinghua University, Beijing 100084, China
| | - B X Liu
- Key Laboratory of Advanced Materials (MOE), School of Materials science and Engineering, Tsinghua University, Beijing 100084, China
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18
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Wu HH, Wu XB, Li YN, Yang MH, Wang MY. [Management of pelvic injury associated with complete anterior sacroiliac joint dislocation]. Beijing Da Xue Xue Bao Yi Xue Ban 2015; 47:276-280. [PMID: 25882944] [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: 06/04/2023]
Abstract
OBJECTIVE To investigate the management of pelvic injury associated with complete anterior sacroiliac joint dislocation. METHODS In the study, 6 cases of pelvic injury associated with complete anterior sacroiliac joint dislocation treated in Beijing Jishuitan Hospital from February 2008 to June 2014 were analyzed. We described the history and severity of injury, emergency treatment, and fracture radiology. In all the cases, the surgical treatment and postoperative functional exercise were performed. We followed up all the cases on an average of 1.6 years, assessed the postoperative recovery and summed up the treatment experience. RESULTS All the 6 patients with fractures recovered without infection and nerve symptoms after surgery. Their X-rays showed good reduction of sacroiliac joints. All the cases were followed up on an average of 1.6 years. Six months after surgery, the Majeed scores were perfect in 2 cases, good in 2, fair in 1, and poor in 1. The patients with poor scores suffered persistent pain, and decreased physical activity, and when walking long distances, they needed a walking stick. The 2 patients with low scores could not resume the original work. CONCLUSION Pelvic injury associated with complete anterior sacroiliac joint dislocation is a special type of the pelvic injury since the managements during the emergency phase are difficult.The surgery should be done as early as possible, and the anterior approach is available for the reduction and fixation.
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Affiliation(s)
- H H Wu
- Department of Orthopaedic Trauma, Beijing Jishuitan Hospital, Beijing 100035, China
| | - X B Wu
- Department of Orthopaedic Trauma, Beijing Jishuitan Hospital, Beijing 100035, China
| | - Y N Li
- Department of Orthopaedic Trauma, Beijing Jishuitan Hospital, Beijing 100035, China
| | - M H Yang
- Department of Orthopaedic Trauma, Beijing Jishuitan Hospital, Beijing 100035, China
| | - M Y Wang
- Department of Orthopaedic Trauma, Beijing Jishuitan Hospital, Beijing 100035, China
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19
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Wang Y, Wu XB, Yang MH, Jiang Y, Zhao G, Zhang ZA. [Pregnancy-related pelvic ring disease and its treatment]. Beijing Da Xue Xue Bao Yi Xue Ban 2015; 47:368-372. [PMID: 25882961] [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: 06/04/2023]
Abstract
Pregnancy-related pelvic ring disease brings great suffering to pregnant women, including the separation of the pubic symphysis and sacroiliac joint pain. Hormonal changes leading to ligamentous laxity is the main reason for Pregnancy-related pelvic ring disease. In normal pregnant cases, and the physiologic widening at the symphysis is about 3-7 mm. When the widening of the symphysis is more than 10 mm, it may lead to symptoms and need active treatment. Currently the diagnosis of the pubic symphysis separation is based on the clinical symptoms and signs. The treatment of acute pubic symphysis separation bases on conservative therapy, includes bed rest and physical therapy. But when the widening of the symphysis is more than 4 cm, the surgery intervention may be a good treatment. If the conservative treatment is not obviously effective, the surgery consists of plate fixation in the pubic symphysis and sacroiliac screw fixation. Other indications for the surgical intervention include inadequate reduction, recurrent diastasis, intractable symptoms, and open rupture.
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Affiliation(s)
- Y Wang
- Department of Orthopedics, Beijing Huairou District Chinese Medicine Hospital, Beijing 101400, China
| | - X B Wu
- Department of Trauma and Orthopedics, Beijing Jishuitan Hospital, Beijing 100035, China
| | - M H Yang
- Department of Trauma and Orthopedics, Beijing Jishuitan Hospital, Beijing 100035, China
| | - Y Jiang
- Department of Trauma and Orthopedics, Beijing Jishuitan Hospital, Beijing 100035, China
| | - G Zhao
- Department of Trauma and Orthopedics, Beijing Jishuitan Hospital, Beijing 100035, China
| | - Z A Zhang
- Department of Trauma and Orthopedics, Beijing Jishuitan Hospital, Beijing 100035, China
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Du MY, Ma RM, Lao TTH, Chen Z, Xiao H, Tian YQ, Li BL, Liang K, Zhang L, Yang MH, Li J, Li H, Yan R, Geng L, Qi WJ, Li HY, Xu J, Hu SQ, Liang GH, Yu JH. Early third trimester maternal response to glucose challenge and pregnancy outcome in Chinese women-relationship between upper distribution level and recommended diagnostic criteria. Eur J Clin Nutr 2015; 69:1133-9. [PMID: 25626407 DOI: 10.1038/ejcn.2014.293] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 12/02/2014] [Accepted: 12/19/2014] [Indexed: 11/09/2022]
Abstract
BACKGROUND/OBJECTIVES The objective of this study was to examine the relationship between upper distribution levels of glucose values in the 75-g oral glucose tolerance test (OGTT) and recommended diagnostic criteria for gestational diabetes mellitus (GDM) and adverse pregnancy outcomes. SUBJECTS/METHODS The distribution of the OGTT 2-h values of 13,501 pregnant women, which were below the World Health Organization (WHO) threshold for overt diabetes mellitus (DM), and managed in one teaching hospital in China, was reviewed and related to maternal characteristics and pregnancy outcomes. RESULTS For the entire group, the 90th and 95th percentile values of the OGTT 2-h glucose level, respectively, were close to the diagnostic cutoff values of the WHO and International Association of Diabetes and Pregnancy Study Groups (IADPSG) criteria. For adverse maternal outcomes, glucose level above the 90th percentile value was associated with increased hypertensive disorders, whereas no difference was seen with cutoff using the 95th percentile value. For perinatal outcomes, the 90th percentile was associated with increased neonatal intensive care unit admission and hypoglycemia, whereas the 95th percentile showed in addition association with phototherapy for jaundice and 5th-minute Apgar score <7. Although no differences in the incidence of adverse pregnancy outcomes were found using the different cutoffs, the >95th percentile cutoff value would have missed out 33.3-56.7% of the cases of adverse outcomes that would otherwise have been attributed to GDM. CONCLUSIONS Further studies are warranted to clarify which diagnostic criterion is most appropriate universally to identify adverse pregnancy outcomes attributed to GDM, and which could be mitigated with treatment specific for GDM.
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Affiliation(s)
- M Y Du
- Department of Obstetrics and Gynecology, Kunming City, P.R. China
| | - R M Ma
- Department of Obstetrics and Gynecology, Kunming City, P.R. China
| | - T T-H Lao
- Department of Obstetrics and Gynecology, Prince of Wales Hospital, Chinese University of Hong Kong, Hong Kong Special Administrative Region
| | - Z Chen
- Department of Obstetrics and Gynecology, Kunming City, P.R. China
| | - H Xiao
- Department of Obstetrics and Gynecology, Kunming City, P.R. China
| | - Y Q Tian
- Department of Obstetrics and Gynecology, Kunming City, P.R. China
| | - B L Li
- Department of Obstetrics and Gynecology, Kunming City, P.R. China
| | - K Liang
- From the Department of Pediatrics, First Affiliated Hospital of Kunming Medical University, P.R. China
| | - L Zhang
- Department of Obstetrics and Gynecology, Kunming City, P.R. China
| | - M H Yang
- Department of Obstetrics and Gynecology, Kunming City, P.R. China
| | - J Li
- Department of Obstetrics and Gynecology, Kunming City, P.R. China
| | - H Li
- Department of Obstetrics and Gynecology, Kunming City, P.R. China
| | - R Yan
- Department of Obstetrics and Gynecology, Kunming City, P.R. China
| | - L Geng
- Department of Obstetrics and Gynecology, Kunming City, P.R. China
| | - W J Qi
- Department of Obstetrics and Gynecology, Kunming City, P.R. China
| | - H Y Li
- Department of Obstetrics and Gynecology, Kunming City, P.R. China
| | - J Xu
- Department of Obstetrics and Gynecology, Kunming City, P.R. China
| | - S Q Hu
- Department of Obstetrics and Gynecology, Kunming City, P.R. China
| | - G H Liang
- Department of Obstetrics and Gynecology, Kunming City, P.R. China
| | - J H Yu
- Department of Obstetrics and Gynecology, Kunming City, P.R. China
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Yang MH, Cho J, Choi YH, Son HJ, Rhee JC, Sung J. The association between coronary artery calcification and colorectal adenoma. Hepatogastroenterology 2013; 60:538-42. [PMID: 23108081 DOI: 10.5754/hge12709] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND/AIMS Both colorectal neoplasm and coronary artery disease are prevalent diseases worldwide and share several risk factors. The aim of this study was to investigate the association between coronary artery calcification and prevalence of colorectal adenoma. METHODOLOGY We retrospectively evaluated 3,092 subjects who underwent colonoscopy and coronary artery calcium computed tomography (CT) on the same day or within a 3-month interval, during routine check-ups between January 2006 and June 2009 at the Center for Health Promotion of the Samsung Medical Center. Multivariate logistic regression analysis was used to calculate adjusted odds ratios (ORs). RESULTS Colorectal adenomas were detected in 1,067 (34.5%) of the 3,092 subjects, including 536 (41.0%) individuals with and 531 (29.7%) without coronary calcification (p<0.001). Multiple logistic regression analysis showed that the presence of coronary artery calcification (OR=1.346; 95% confidence interval [CI]=1.122-1.614), age ≥50 years (OR=1.516; 95% CI=1.256-1.829), waist circumference of 90-99cm (OR=1.364; 95% CI=1.008-1.844) and current smoker (OR=1.266; 95% CI=1.045-1.534) were associated with the prevalence of colorectal adenoma. CONCLUSIONS The prevalence of colorectal adenoma is significantly higher in patients with coronary artery calcification. Our results support positive relationship between coronary artery disease and colorectal adenoma.
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Affiliation(s)
- M H Yang
- Center for Health Promotion, John Hopkins University, Bloomberg School of Piblic Helath Baltimore, Maryland, USA
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Abstract
Hereditary palmoplantar keratodermas (PPK) comprise a clinically and genetically heterogeneous group of genodermatoses, which share the characteristic of impaired epidermal differentiation, resulting in prominent palmoplantar hyperkeratosis. Molecular genetic analyses have helped characterize the underlying genetic defects in an increasing number of hereditary PPKs over the past two decades, and thus a pathophysiological classificaiton seems more reasonable. Today PPK can be classified based on defects in keratins, loricrin, desmosomes, connexins and cathepsins. In this report, we describe a 22-year-old man who had been born a collodion baby, and later developed diffuse PPK with pseudoainhum and generalized ichthyosis. His mother and grandmother had similar characteristics. Direct sequencing of genomic DNA identified a frameshift insertion mutation (730insG) in the loricrin gene. This family had the typical presentation of loricrin keratoderma. It also indicates that collodion baby may be the first presentation in patients with loricrin keratoderma.
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Affiliation(s)
- J M Yeh
- Department of Dermatology, National Cheng Kung University Medical College and Hospital, Tainan, Taiwan, China
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Li WZ, Zhao SM, Huang Y, Yang MH, Pan HB, Zhang X, Ge CR, Gao SZ. Expression of lipogenic genes during porcine intramuscular preadipocyte differentiation. Res Vet Sci 2012; 93:1190-4. [PMID: 22795880 DOI: 10.1016/j.rvsc.2012.06.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2011] [Revised: 06/11/2012] [Accepted: 06/17/2012] [Indexed: 11/30/2022]
Abstract
Intramuscular fat (IMF) content plays an important role in meat quality. Triglyceride (TG) metabolism in intramuscular adipocytes is strongly associated with the intramuscular fat deposition. To better understand the mechanisms leading to IMF deposition we compared the expression levels of genes related to preadipocyte differentiation and lipogenesis in the intramuscular preadipocytes isolated from the longissimus muscle of Wujin and Landrace pigs. The results showed that the intramuscular preadipocytes could differentiate into mature adipocytes in vitro. Triglyceride content in adipocytes isolated from Wujin pigs was higher than Landrace pigs during the middle and later phases of preadipocyte differentiation. The expression levels of genes related to preadipocyte differentiation such as PPARG and CEBPA showed differential expression between Wujin and Landrace porcine adipocytes during the early stage of differentiation. The expression levels of lipogenic genes such as FASN and SREBF1 were significantly higher in Wujin porcine intramuscular preadipocytes than in Landrace intramuscular preadipocytes at the middle and the later stages of differentiation. This suggests that preadipocyte differentiation and lipogenesis exhibited breed-related scheduling.
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Affiliation(s)
- W Z Li
- College of Animal Science and Technology, Yunnan Agricultural University, Kunming 650201, China
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Park JH, Ko Y, Kim WJ, Jang MS, Yang MH, Han MK, Oh CW, Park SH, Lee J, Lee J, Bae HJ, Gorelick PB. Is asymptomatic hemorrhagic transformation really innocuous? Neurology 2012; 78:421-6. [PMID: 22282643 DOI: 10.1212/wnl.0b013e318245d22c] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVES Asymptomatic hemorrhagic transformation (HT) is not associated with immediate deterioration of patients with acute ischemic stroke. However, it is unclear whether it is clinically innocuous with respect to long-term outcome. The aim of this study was to determine the impact of asymptomatic HT on 3-month outcome. METHODS A consecutive series of 1,618 patients, hospitalized between January 2004 and August 2007 for ischemic stroke within 7 days from symptom onset were identified in a prospective stroke registry database. Those who had no evidence of acute cerebral ischemia on diffusion-weighted MRI, who did not undergo T2-weighted gradient echo MRI, whose modified Rankin Scale (mRS) score at 3 months after stroke onset was not available, or who had symptomatic HT were excluded. The odds ratio (OR) of asymptomatic HT was calculated for the full distribution of mRS score and adjusted for variables with p < 0.25 with respect to their associations with asymptomatic HT or functional outcome. RESULTS Of 1,412 patients eligible for the study, 100 (7.1%) had asymptomatic HT. Patients who experienced asymptomatic HT were more likely to have cardioembolic stroke, to receive thrombolytic therapy, to receive anticoagulation with heparin, and to have a higher initial NIH Stroke Scale score. The crude and adjusted ORs of asymptomatic HT for an increment of mRS score at 3 months were 2.94 (95% confidence interval 2.05-4.24) and 1.90 (1.27-2.82), respectively. CONCLUSIONS Our study shows that the odds of a worse outcome are increased by a factor of 2 in patients with asymptomatic HT compared with those without HT after acute ischemic stroke.
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Affiliation(s)
- J H Park
- Department of Neurology, Dongguk University Gyeongju Hospital, Gyeongju, Korea
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Son HJ, Song SY, Lee WY, Yang SS, Park SH, Yang MH, Yoon SH, Chun HK. Characteristics of early colorectal carcinoma with lymph node metastatic disease. Hepatogastroenterology 2008; 55:1293-1297. [PMID: 18795675] [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: 05/26/2023]
Abstract
BACKGROUND/AIMS Endoscopic resection may safely and effectively remove early colorectal cancers. However, additional surgical treatment is needed in cases with metastatic lymph nodes for curative treatment. The purpose of this study was to investigate the correlation between lymph node metastasis and various pathological parameters in early colorectal cancers. METHODOLOGY The clinicopathological records of 3,557 colorectal adenocarcinoma patients who underwent surgical resection at the Samsung Medical Center from August 1995 to June 2005 were reviewed. One hundred forty seven tissue samples with early colorectal cancer were used in this study. Various parameters were studied including gender, location, macroscopic appearance, differentiation, lymphatic tumor emboli, and the depth of tumor invasion. RESULTS Twenty five patients (17.0%) had lymph node metastasis. Male gender, left colon, macroscopically depressed lesions, moderately or poorly differentiated carcinoma, depth of tumor invasion (Sm2 or Sm3), and presence of lymphatic tumor emboli were the risk factors for lymph node metastasis. CONCLUSIONS Early colorectal cancers with male gender, location in the left colon, macroscopically depressed lesion, moderate or poor differentiation, depth in Sm2 or Sm3, and the presence of lymphatic tumor emboli have higher risk of lymph node metastasis than those without. The early colorectal cancers with these risk factors should have surgical resection.
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Affiliation(s)
- H J Son
- Department of Medicine, Samsung Medical Center, 50 Irwon-dong, Gangnam-gu, Seoul 135-710, Korea
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Al Akhrass S, Reiter G, Hou SY, Yang MH, Chang YL, Chang FC, Wang CF, Yang ACM. Viscoelastic thin polymer films under transient residual stresses: two-stage dewetting on soft substrates. Phys Rev Lett 2008; 100:178301. [PMID: 18518343 DOI: 10.1103/physrevlett.100.178301] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2007] [Indexed: 05/26/2023]
Abstract
A nonmonotonic, two-stage dewetting behavior was observed for spin coated thin viscoelastic polymer films on soft elastic substrates. At times shorter than the relaxation time of the polymer (t<tau_{rep}), dewetting generated deep trenches in the soft rubbery substrate which, in turn, almost stopped dewetting. At later stages (t>>tau_{rep}), dewetting accelerated, accompanied by an unstable rim. However, holes nucleated at t<tau_{rep} showed only this second-stage behavior. Our observations are attributed to large elastic deformations in the substrate caused by transient residual stresses within the film.
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Affiliation(s)
- S Al Akhrass
- Institute de Chimie des Surfaces et Interfaces, UHA-CNRS, 15, rue J. Starcky, 68057 Mulhouse Cedex, France
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Li S, Yang MH, Zeng CA, Wu WL, Huang XF, Ji Y, Zeng JQ. Association of vitamin D receptor gene polymorphisms in Chinese patients with generalized aggressive periodontitis. J Periodontal Res 2008; 43:360-3. [PMID: 18205735 DOI: 10.1111/j.1600-0765.2007.01044.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND AND OBJECTIVE The clinical features suggest that genetic factors may have a strong influence on susceptibility to aggressive periodontitis. The aim of this study was to investigate the association of vitamin D receptor gene polymorphisms with generalized aggressive periodontitis in Chinese patients. MATERIAL AND METHODS A restriction fragment length polymorphism (RFLP) for 10,438,141 C to T (rs1544410, BsmI), 10,382,063 A to G (rs731236, TaqI), 10,382,143 C to A (rs7975232, ApaI) and 10,416,201 A to G (rs2228570, FokI) of vitamin D receptor gene was analysed by polymerase chain reaction, followed by digestion with restriction enzymes and gel electrophoresis. The genotypes of 51 generalized aggressive periodontitis patients and 53 periodontally healthy control subjects were analysed. The genotypic and allelic frequencies of each polymorphism site for the patients and control subjects were compared. RESULTS The distribution of vitamin D receptor FokI genotypes and alleles between the two groups was significantly different (p = 0.043 and p = 0.012, respectively). The F allele seemed to increase the susceptibility of aggressive periodontitis (odds ratio = 2.02, 95% confidence interval = 1.16-3.50) in Chinese patients. There was no significant difference in the genotype distribution or the allele frequencies of vitamin D receptor BsmI, ApaI and TaqI between two groups. CONCLUSION The study indicates that FokI polymorphism of vitamin D receptor gene might be associated with generalized aggressive periodontitis in Chinese patients. In addition, the carriage of F allele increases the risk of developing generalized aggressive periodontitis.
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Affiliation(s)
- S Li
- Department of Stomatology, Medical School, Jinggangshan University, Ji'an, Jiangxi, China
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Yang MH, Huang LY, Suo J, Sung FC. Effectiveness of Tuberculosis Treatment and Risk of Drug-Induced Hepatotoxicity in a Population Cohort in Taiwan. Am J Epidemiol 2006. [DOI: 10.1093/aje/163.suppl_11.s251-d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Abstract
The molecular recoiling force stemming from nonequilibrium chain conformation was found to play a very important role in the dewetting stability of polymer thin films. Correct measurements and inclusion of this molecular force into thermodynamic consideration are crucial for analyzing dewetting phenomena and nanoscale polymer chain physics. This force was measured using a simple method based on contour relaxation at the incipient dewetting holes. The recoiling stress was found to increase dramatically with molecular weight and decreasing film thickness. The corresponding forces were calculated to be in the range from 9.0 to 28.2 mN/m, too large to be neglected when compared to the dispersive forces (approximately 10 mN/m) commonly operative in thin polymer films.
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Affiliation(s)
- M H Yang
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, Taiwan
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Ogdie MN, Bakker SC, Fisher SE, Francks C, Yang MH, Cantor RM, Loo SK, van der Meulen E, Pearson P, Buitelaar J, Monaco A, Nelson SF, Sinke RJ, Smalley SL. Pooled genome-wide linkage data on 424 ADHD ASPs suggests genetic heterogeneity and a common risk locus at 5p13. Mol Psychiatry 2006; 11:5-8. [PMID: 16205734 DOI: 10.1038/sj.mp.4001760] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Chao JH, Sun YC, Chen CJ, Tseng CL, Yang MH. Determination of trace Al in silicon carbide by epithermal neutron activation. Appl Radiat Isot 2005; 62:561-7. [PMID: 15701410 DOI: 10.1016/j.apradiso.2004.09.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2004] [Revised: 08/24/2004] [Accepted: 09/24/2004] [Indexed: 11/28/2022]
Abstract
An approach based on utilization of epithermal neutron activation analysis (ENAA) is proposed for determination of trace Al in silicon carbide (SiC) materials. The feasibility and restrictions of the ENAA were evaluated in terms of the associated uncertainties that resulted from counting and from propagation in calculations. Experimental measurements were carried out under the specified irradiation and measurement conditions, where the results of a set of SiC standards for accuracy testing were compared with the calculated uncertainties. It is shown that the epithermal neutron activation is a simple and reliable method practically useful for analysis of SiC containing Al in concentrations (f(Al)) higher than 10(-3) weight fraction by the use of a typical nuclear reactor; the associated uncertainties can be suppressed to less than 12%. The influences of neutron quality or the cadmium ratio in 27Al(n,gamma)28Al reaction on the applicable concentrations of Al in SiC are also predicted and discussed.
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Affiliation(s)
- J H Chao
- Nuclear Science and Technology Development Center, National Tsing Hua University, Hsinchu 300, Taiwan, ROC.
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Lee MY, Chiou TJ, Yang MH, Bai LY, Hsiao LT, Chao TC, Tung SL, Wang WS, Yen CC, Liu JH, Chen PM. Relatively favorable outcomes of post-transplant pulmonary function in patients with chronic myeloid leukemia receiving non-myeloablative allogeneic hematopoietic stem cell transplantation. Eur J Haematol 2005; 74:152-7. [PMID: 15654907 DOI: 10.1111/j.1600-0609.2004.00366.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [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: 11/30/2022]
Abstract
Pulmonary function tests were performed in 20 patients with chronic myeloid leukemia before and after human leukocyte antigen-matched allogeneic sibling hematopoietic stem cell transplantation (HSCT) to identify any conditioning treatment effects on post-transplant function from January 1995 to December 2002. Of 20 patients, eight received non-myeloablative conditioning treatment and 12 received conventional myeloablative conditioning treatment. Pulmonary function tests including forced vital capacity (FVC), forced expiratory volume in the first second (FEV1), and diffusion capacity for carbon monoxide (DLCO) were performed pretransplant, 6 and 12 months post-transplant. Possible pre-HSCT and post-HSCT risk factors were evaluated for association with pulmonary function. The results showed that myeloablative conditioning treatment had greater negative impact on FEV1, FVC, and DLCO than non-myeloablative conditioning therapy. We conclude that non-myeloablative allogeneic HSCT may apply a better transplant choice in patients who need special concern with post-transplant pulmonary function changes.
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Affiliation(s)
- M Y Lee
- Division of Medical Oncology, Department of Medicine, Taipei Veterans General Hospital and National Yang-Ming University School of Medicine, Taipei, Taiwan
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Chen CY, Chen LC, Yeh KW, Ou LS, Yang MH, Huang JL. Sequential changes to clinical parameters and adhesion molecules following intravenous pulse cyclophosphamide and methylprednisolone treatment of refractory juvenile idiopathic arthritis. Clin Exp Rheumatol 2004; 22:259-64. [PMID: 15083898] [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: 04/29/2023]
Abstract
It is believed that the systemic subtype and the positive rheumatoid factor, polyarticular subtype of juvenile idiopathic arthritis (JIA) show the least favorable outcomes for therapy; patients with systemic JIA are often resistant to recommended therapeutic modalities. We report the sequential changes to clinical and laboratory findings from pulse therapy with monthly intravenous cyclophosphamide (0.5 g/m2 body surface area) administration combined with methylprednisolone (30 mg/kg; 1 gm maximum) for 6 months, following which the medication interval was elongated to 3 months for a total of from 7 to 12 courses. Among 4 children suffering from refractory systemic JIA, 3 demonstrated clinical improvement, 2 of whom achieved clinical remission. Furthermore, we also adminstered this therapy to a girl suffering from refractory polyarticular JIA, following which she revealed clinical remission subsequent to 9 courses of such therapy. From our experience, we suggest that patients afflicted with JIA that is unresponsive to traditional medication may experience benefit from this type of pulse therapy.
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Affiliation(s)
- C Y Chen
- Division of Allergy, Asthma, and Rheumatology, Department of Pediatrics, Chang Gung Children's Hospital, Chang Gung University, Kweishan, Taoyuan, Taiwan
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Sun YC, Lee YS, Shiah TL, Lee PL, Tseng WC, Yang MH. Comparative study on conventional and low-flow nebulizers for arsenic speciation by means of microbore liquid chromatography with inductively coupled plasma mass spectrometry. J Chromatogr A 2003; 1005:207-13. [PMID: 12924795 DOI: 10.1016/s0021-9673(03)00843-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [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: 11/19/2022]
Abstract
The performance of conventional and low-flow nebulizer systems with liquid chromatography in differentiating four arsenic species in urine was evaluated. Two low-flow (DIN and MCN) chamber assemblies and a conventional (CFN) nebulizer-spray chamber assembly were compared in the hyphenation of anion-exchange microbore liquid chromatography with inductively coupled plasma mass spectrometry. Under optimal analytical conditions, the detection limits of the four arsenic species were 0.2-0.6 ng ml(-1) for all the nebulizer systems tested. The chromatographic resolution was best in the case of DIN due to its minimal off-column dead volume and superior transport efficiency. Four arsenic species were determined in the certified reference materials NIST SRM 2670E and 2670N.
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Affiliation(s)
- Y C Sun
- Nuclear Science and Technology Department Center, National Tsing-Hua University, 30043 Hsinchu, Taiwan.
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Wu ML, Tsai WJ, Ger J, Deng JF, Tsay SH, Yang MH. Cholestatic hepatitis caused by acute gold potassium cyanide poisoning. J Toxicol Clin Toxicol 2002; 39:739-43. [PMID: 11778673 DOI: 10.1081/clt-100108516] [Citation(s) in RCA: 15] [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] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
INTRODUCTION Poisoning after oral ingestion of gold potassium cyanide is rarely reported. A case of suicidal ingestion of gold potassium cyanide (potassium dicyanoaurate; CAS# 13967-50-5) is described. CASE REPORT A 27-year-old man attempted suicide by ingesting 5 mL gold potassium cyanide solution. He developed vomiting, hyperamylasemia, and hepatic dysfunction. Cyanide poisoning was not detected but acute gold toxicity was noted. Pathologic findings of the liver showed centrilobular cholestasis with eosinophilic degeneration. The whole blood and serum gold were 4361 and 6011 microg/L, respectively, and the 24-hour urine gold was 429 microg/d in samples obtained on day 4. CONCLUSION Gold-induced hepatotoxicity has been seen infrequently in patients receiving gold therapy. Reported agents include sodium aurothiomalate, sodium aurothiopropranol sulfonate, aurothioglucose, aurothiopolypeptide (Auro-detoxin), auric sulfide, and gold thiosulfate, our report adds gold potassium cyanide.
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Affiliation(s)
- M L Wu
- Department of Medicine, Taipei Veterans General Hospital, National Yang-Ming University, Taiwan.
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Wu CJ, Huang JL, Yang MH, Yan DC, Ou LS, Ho HH. Clinical characteristics of juvenile rheumatoid arthritis in Taiwan. J Microbiol Immunol Infect 2001; 34:211-4. [PMID: 11605814] [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: 02/21/2023]
Abstract
This study aimed to investigate the clinical features of juvenile rheumatoid arthritis among Taiwan children. The medical records of 228 children who had juvenile rheumatoid arthritis treated in the Chang Gung Medical Center in Taiwan from 1978 through 1998 were retrospectively reviewed. A total of 146 boys and 82 girls (M:F ratio, 1.8:1) were included in this study. Clinical and laboratory data of these patients were collected from medical charts. Pauciarticular onset (56%) was the most common type of juvenile rheumatoid arthritis, followed by polyarticular (36%) and systemic (8%) type. The positive rate for rheumatoid factor, human leukocyte antigen B27, and antinuclear antibody were 9.2%, 55.2%, and 16.2%, respectively. Uveitis was observed in 5.7% of patients. Compared with previous reports in other regions and populations, remarkably different features of juvenile rheumatoid arthritis were found in this study, which included a higher prevalence among boys than girls, a high positive rate of human leukocyte antigen B27, and a low rate of uveitis.
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Affiliation(s)
- C J Wu
- Department of Pediatrics, Chang Gung Children's Hospital, Taiwan, ROC
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Abstract
The experience of nurses working in end-of-life care, particularly those caring for cancer patients in the hospice setting, have been well researched. Yet despite the fact that intensive care units (ICUs) are frequently the site of patient death, studies of the nurses working in these units are uncommon. This study was designed to provide qualitative data to explore the experiences of intensive care nurses caring for patients who are dying. Semi-structured interviews were conducted with ten nurses who had experience of caring for dying patients in ICUs in two teaching hospitals in Taiwan. Data were analysed using a phenomenological descriptive approach. Participants' descriptions revealed the following core themes: considering nurses' attitudes to caring for the dying, stressors associated with this care and coping strategies that intensive care nurses adopt. The study concludes that education for ICU nurses must address these issues to facilitate better care of dying patients in the ICU.
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Affiliation(s)
- M H Yang
- Intensive Care Unit, Veteran General Hospital, Taipei, Taiwan
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Yang MH, Lu J, Xiang CZ, Yao HW. [Quality of soil environment and good agriculture practice of Chinese herbal drugs]. Zhongguo Zhong Yao Za Zhi 2001; 26:514-6. [PMID: 12820648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Affiliation(s)
- M H Yang
- Institute of Development of Pharmaceutical Plant Resources, Taiji Group, Fuling 408000, Chongqing
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Shiue MY, Sun YC, Yang MH. Determination of tellurium in indium antimonide semiconductor material by electrothermal atomic absorption spectrometry. Analyst 2001; 126:1449-52. [PMID: 11534624 DOI: 10.1039/b102219i] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A method for the determination of the dopant concentration of tellurium in dissolved indium antimonide semiconductor material by electrothermal atomic absorption spectrometry (ETAAS) was developed. Efforts were made to investigate the optimal conditions of the furnace heating program and the effect of palladium modifier on the variation of tellurium and the background absorbance. According to the results obtained, the presence of palladium chemical modifier in the analysis of indium antimonide allowed the successful retention of tellurium in the graphite tube, and the optimum mass of palladium modifier was found to be dependent on the sample matrix concentration. The absorbance profile of tellurium and the background level were significantly improved when a pyrolysis temperature of 1100 degrees C and an atomization temperature of 2200 degrees C were employed in the optimized heating program. With the use of this method, a detection limit of 0.8 microg g(-1) tellurium in indium antimonide could be achieved. The applicability of the proposed method was evaluated by comparison with two independent methods, i.e. slurry sampling-ETAAS and ICP-MS. From the good agreement between the results, it was demonstrated that the proposed method is suitable for the determination of typical dopant concentrations of tellurium in indium antimonide.
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Affiliation(s)
- M Y Shiue
- Department of Nuclear Science, National Tsing-Hua University, Hsinchu, Taiwan
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Chen PM, Chiou TJ, Yu IT, Fan FS, Chu CJ, Kao SC, Wang WS, Liu JH, Hsu WM, Yang MH, Chao TC, Tai CJ, Hsiao LT, Lin JT, Yen CC. Molecular analysis of mucosa-associated lymphoid tissue (MALT) lymphoma of ocular adnexa. Leuk Lymphoma 2001; 42:207-14. [PMID: 11699208 DOI: 10.3109/10428190109097692] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [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: 11/13/2022]
Abstract
Lymphomas of mucosa-associated lymphoid tissue (MALT) are a distinct subgroup of extranodal B-cell non-Hodgkin's lymphomas. Most studies have failed to demonstrate the clonal rearrangement of BCL-1, BCL-2 or c-MYC genes for MALT lymphomas. Further, alteration of the p53 gene is rarely demonstrated in low-grade MALT lymphomas, but can be detected in high-grade disease. Lymphomas of the ocular adnexa represent approximately eight percent of all extranodal lymphomas, most of which are MALT lymphomas, but few studies had explored the alterations of BCL-1, BCL-2, c-MYC and p53 genes specifically for ocular MALT lymphomas. We investigated the changes to BCL-1, BCL-2, c-MYC and p53 genes in these lymphomas for Taiwanese patients. Clonal rearrangement for immunoglobulin heavy-chain (IgH), BCL-1, BCL-2, c-MYC and p53 genes was examined for 16 cases of ocular MALT lymphoma. Restriction-length polymorphism and polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP) of the DNA, corresponding to exons 5 through 9, followed by DNA sequencing, were utilized to analyze the possible mutations of the p53 gene for these tumors. Thirteen of the cases revealed rearranged IgH genes using Southern blotting or PCR. No rearrangement of BCL-1, BCL-2, c-MYC or p53 genes was discovered, with point mutation of the p53 gene in one case. As for other types of MALT lymphomas, BCL-1, BCL-2 and c-MYC genes are not implicated in the pathogenesis of the ocular sub-group. Although alteration of the p53 gene is rare for low-grade ocular MALT lymphoma, its role in disease progression merits further research.
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Affiliation(s)
- P M Chen
- Division of Medical Oncology, Department of Medicine, Taipei Veterans General Hospital, National Yang-Ming University, School of Medicine, Taipei, Taiwan, R.O.C
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Hwang YC, Lee TW, Kim MJ, Yang MH, Ihm CG. Clinical course of patients with IgA nephropathy between combined treatment of immunosuppressive agents and ACE inhibitor and ACE inhibitor alone. Korean J Intern Med 2001; 16:105-9. [PMID: 11590896 PMCID: PMC4531711 DOI: 10.3904/kjim.2001.16.2.105] [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] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND It has not been clear whether immunosuppressive therapy favorably influences renal function and proteinuria in IgA nephropathy (IgAN). Angiotensin converting enzyme inhibitor (ACEi) has an anti-proteinuric effect in IgAN. A retrospective study was done to see whether the addition of immunosuppressive therapy to ACEi produces a more excellent anti-proteinuric effect and preserves better renal function than ACEi alone. METHODS A total of 49 patients with proteinuria > 1.0 g/day and serum creatinine concentrations < 1.5 mg/dL were followed-up from at least 1 year to 9 years. Among them, 25 patients were treated with the combination of cyclophosphamide, prednisolone and ACEi while the other 24 were treated with ACEi alone. RESULTS The combination therapy or ACEi alone both reduced proteinuria with significant value (the combination group: from 5.74 +/- 5.08 to 2.29 +/- 2.77 g/day, ACEi group: from 3.85 +/- 2.54 to 1.68 +/- 1.91 g/day), while no significant differences in reduction of proteinuria were noticed between the two groups. There was no significant elevation of serum creatinine in both groups during follow-up (the combination group: from 0.91 +/- 0.20 to 1.03 +/- 0.38 mg/dL, ACEi group: from 0.93 +/- 0.27 to 0.99 +/- 0.37 mg/dL). This study showed no significant differences in the change in slope of 1/serum creatinine levels during the follow-up period between the two groups. CONCLUSION We conclude that immunosuppressive therapy may not be beneficial in patients with proteinuric IgAN. ACEi may be a valuable therapeutic agent avoiding serious side effects of immunosuppressive agents.
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Affiliation(s)
- Y C Hwang
- Department of Internal Medicine, Kyung Hee University Medical Center, Hoikidong, Dongdaemunku, Seoul 130-702, Korea
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Yang MH, Hsu HC. Pure red cell aplasia after ABO-incompatible allogeneic stem cell transplantation in severe aplastic anemia with response to steroids: a case report and literature review. Ann Hematol 2001; 80:299-301. [PMID: 11446734 DOI: 10.1007/s002770000275] [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: 11/28/2022]
Abstract
Pure red cell aplasia (PRCA) is a rare complication after ABO-incompatible allogeneic stem cell transplantation, but its mechanism is still unknown. Here we report on a patient with severe aplastic anemia who developed PRCA after HLA-identical but major ABO-mismatched peripheral blood stem cell transplantation. Erythroid engraftment was successful with primary steroid treatment. We concluded that an adequate dose of steroids can be the first line of therapy for PRCA after ABO-mismatched allogeneic stem cell transplantation.
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Affiliation(s)
- M H Yang
- Department of Medicine, Taipei Veterans General Hospital, Taiwan
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Liu JH, Yang MH, Fan FS, Yen CC, Wang WS, Chang YH, Chen KK, Chen PM. Tamoxifen and colchicine-modulated vinblastine followed by 5-fluorouracil in advanced renal cell carcinoma: a phase II study. Urology 2001; 57:650-4. [PMID: 11306370 DOI: 10.1016/s0090-4295(00)01096-7] [Citation(s) in RCA: 14] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
OBJECTIVES Chemotherapy resistance of renal cell carcinoma (RCC) has been attributed in large part to multidrug resistance (MDR). Reported MDR-modulated chemotherapy for RCC, however, has resulted in only marginal response benefits. In this study, the MDR-modulated effect of paired tamoxifen and colchicine on vinblastine and the possible additive effect of 5-fluorouracil (5-FU) were investigated in the treatment of advanced RCC. METHODS Chemotherapy was administered every 4 weeks with biweekly vinblastine (4 mg/m(2)/day, intravenously on days 1 and 15) modulated by oral tamoxifen (100 mg/day) and colchicine (1 mg/day) from days -1 to 2 and from days 13 to 16. 5-FU (800 mg/m(2)/day from days 2 to 5) was administered after vinblastine administration as a continuous infusion. RESULTS Of 17 eligible patients with advanced RCC available for evaluation, 1 achieved a complete response (CR) and 3 a partial response (PR), with an overall response (CR plus PR) rate of 23.5%. The median overall survival time of all patients was 10 months (95% confidence interval [CI] 3.5 to 16.5); that of our patients with poor, intermediate, and favorable risks as stratified by Motzer's model was 6 (95% CI 1.7 to 10.3), 10 (95% CI 7.9 to 12.2), and 26 (95% CI 24.4 to 27.6) months, respectively. These results are encouraging in view of the poor efficacy of chemotherapy in RCC observed previously. Additionally, the treatment toxicity was limited: toxicity of grade 3 or greater occurred in only 1 patient with leukopenia, and no treatment-related mortality was found. CONCLUSIONS The encouraging response rates and overall survival with limited toxicity warrant further investigation of this combination therapy as an integrated part of immunochemotherapy for RCC.
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Affiliation(s)
- J H Liu
- Division of Medical Oncology, Taipei Veterans General Hospital and National Yang-Ming University, Republic of China, Taipei, Taiwan
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Hung GY, Chiou T, Hsieh YL, Yang MH, Chen WY. Intestinal metastasis causing intussusception in a patient treated for osteosarcoma with history of multiple metastases: a case report. Jpn J Clin Oncol 2001; 31:165-7. [PMID: 11386464 DOI: 10.1093/jjco/hye031] [Citation(s) in RCA: 15] [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: 11/13/2022] Open
Abstract
Intestinal intussusception caused by metastatic tumors is a very rare condition. Preoperative diagnosis is not easy because of the condition's rarity and because of mild abdominal physical presentation. We report on a patient with osteosarcoma who suffered from abdominal pain and emesis during the period of autologous peripheral blood stem cell transplantation. He had undergone tumor excision and radiotherapy several times prior to autologous peripheral blood stem cell transplantation because of multiple metastases. Intestinal metastasis was suspected initially by computed tomographic scan and sonogram and was proved by surgical resection and pathological findings. Clinicians caring for pediatric patients with osteosarcoma with a history of multiple metastases should consider the possibility of intestinal metastases when equivocal abdominal symptoms develop after intensive chemotherapy.
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Affiliation(s)
- G Y Hung
- Department of Pediatrics, Taipei Veterans General Hospital and School of Medicine, National Yang-Ming University, Taiwan
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Abstract
This paper aims to remind paediatric clinicians to suspect and confirm 'PFAPA' syndrome (Periodic Fever, Aphthous stomatitis, Pharyngitis and cervical Adenitis syndrome). We report two cases of PFAPA syndrome: a 3-year-old healthy boy with atopic rhinitis and a boy aged 8 years 5 months who simultaneously had lymphocytic vasculitis syndrome treated with immunosuppressive drugs. Both met Marshall's criteria. The literature regarding PFAPA syndrome was complied using a Medline search for articles published between 1963 and 1998 and we then reviewed the reference lists of the articles. The Medline search revealed 28 cases with available clinical manifestations, management and prognosis. Our study describes two additional cases. We divided the cases into typical (28 cases) and atypical (two cases) PFAPA syndrome. In typical PFAPA, the age of onset was less than 5 years in most cases and the patients presented 4.9 +/- 1.4 days of fever (100%), pharyngitis (89.3%), cervical adenitis (72.1%), stomatitis (71.4%), malaise (64.3%), headache (60.7%), abdominal pain (53.6%) and nausea/vomiting (17.9%). Afebrile intervals were 3.2 +/- 2.4 months and increased with age. The time from initial onset to final episode was 3 years 7 months +/- 3 years 6 months. The total number of episodes was 8.3 +/- 2.5 (range 6-14). Effective treatment included steroids, tonsillectomy/adenoidectomy and cimetidine. The general outcome was good. In atypical PFAPF, the clinical manifestations were similar to those of typical PFAPA except that the age of onset was more than 5 years, and life-threatening intestinal perforation happened once in a patient with underlying Fanconi's anaemia. It was concluded that typical PFAPA syndrome is benign and can be diagnosed by detailed history-taking and from physical findings during repeated febrile episodes with tests to rule out other periodic fever syndromes. A review of the literatures since the first report in 1987 has shown that typical PFAPA syndrome is not associated with significant long-term sequelae and has a good response to steroids. One patient with atypical PFAPA, who received low-dose steroids for over 1 year, developed intestinal perforation after an increment of the 7-day steroid dose. If an underlying problem requires long-term immunosuppressive medication, it is wiser to choose cimetidine rather than increasing the steroid dosage to resolve atypical PFAPA.
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Affiliation(s)
- W I Lee
- Department of Pediatrics, Chang-Gung Children's Hospital and Chang Gung University, Taoyuan, Taiwan
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Abstract
Systemic lupus erythematosus(SLE) is a prototypic autoimmune disease affecting various organ systems. Hypothermia is a rare manifestation of SLE. We experienced a case of SLE combined with hypothermia. A 36-year-old woman, who had been diagnosed as SLE 3 days before admission, admitted complaining of mental confusion. After admission, her body temperature, initially 36.1 degrees C, became 32.6 degrees C. Her core body temperature was less than 35.0 degrees C. Despite of warming with heating lamp and blankets, her core temperature did not reach 35.0 degrees C during 18 hours. Ten days later, her temperature exceeded 36.0 degrees C.
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Affiliation(s)
- M H Yang
- Department of Internal Medicine, Inha University Medical School, Inchon, Korea
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Yang MH, Ho CH. 2-chlorodeoxyadenosine (cladribine) in the treatment of hairy cell leukemia. Zhonghua Yi Xue Za Zhi (Taipei) 2001; 64:54-8. [PMID: 11310372] [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: 04/16/2023]
Abstract
Hairy cell leukemia is an uncommon chronic B cell lymphoproliferative disorder in Taiwan and only sporadic cases have been noted. This disease is often found in middle-aged men with the typical manifestations of pancytopenia and splenomegaly. While tartrate-resistant acid phosphatase (TRAP) stain of the neoplastic cells in peripheral blood smear is positive in 90% cases, bone marrow examination is still necessary for diagnosis. For treatment, splenectomy and interferon have been the standard strategies. Recently, newly-developed purine analogues, 2-chlorodeoxyadenosine (cladribine) and 2'-deoxycorfomycin (pentostatin), were found to achieve long lasting complete remission. Here we reported a 48-year-old men who was found to have splenomegaly and bicytopenia incidentally at routine physical checkup. Although the TRAP staining of peripheral blood showed negative result, hairy cell leukemia was finally diagnosed by bone marrow biopsy. The following splenectomy showed a typical picture of hairy cell leukemia on pathology, but cytopenia recovered only partially after surgery. One course of chemotherapy with cladribine (0.1 mg/kg/day continuous intravenous infusion for 7 days) was given after recovery from major surgery. The white cell and platelet counts normalized after treatment and he carried a stable condition thereafter. Since the disease is rare and purine analogues are newly developed, there has been no report on using 2-clorodeoxy-adenosine against hairy cell leukemia in our country. Here we suggest that newly developed purine analogues such as cladribine are the first choice of treatment in cases of hairy cell leukemia.
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Affiliation(s)
- M H Yang
- Division of Hematology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan, R.O.C
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Yang MH, Lin SJ. Effect of two-round Ficoll-Hypaque density gradient centrifugation on lymphocyte subsets and natural killer activity of umbilical cord blood mononuclear cells. Pediatr Hematol Oncol 2001; 18:57-63. [PMID: 11205841 DOI: 10.1080/088800101750059864] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Umbilical cord blood (CB) mononuclear cells (MNCs) obtained from Ficoll-Hypaque density gradient centrifugation (FDGC) are frequently contaminated with erythrocytes and nucleated erythroid precursors. The authors investigated the effect of two-round (2-r) FDGC on lymphocyte subsets and natural killer activity of CB and adult peripheral blood (APB) MNCs, in comparison with those obtained from conventional one-round (1-r) separation. The percentage of CD45-expressing CB MNCs was greatly increased after the second density step (p < .01), indicating the efficacy in purification. The percentages of CD3/CD4, CD3/CD8, and CD16/56 double-positive staining CB MNCs were significantly increased after 2-r FDGC, as compared to those after 1-r separation. However, the percentages of CD34+ stem cells and CD19+ B cells were not affected by 2-r FDGC. MNCs obtained from 2-r FDGC had higher natural killer (NK) activity than did MNCs obtained from 1-r separation (p < .01). In contrast, 2-r FDGC did not affect lymphocyte subsets and NK activity of APB MNCs as compared to 1-r FDGC. Thus, 2-r FDGC are recommended to obtain CB MNCs for flow cytometric analysis and NK cytotoxicity assays.
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Affiliation(s)
- M H Yang
- Department of Pediatrics, Chang Gung Children's Hospital, Taoyuan, Taiwan
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Yang MH, Yen CC, Chang YH, Hsieh RK, Liu JH, Chiou TJ, Fan FS, Lin AT, Huang WJ, Wang WS, Chen KK, Chen PM. Single agent paclitaxel as a first-line therapy in advanced urothelial carcinoma: its efficacy and safety in patients even with pretreatment renal insufficiency. Jpn J Clin Oncol 2000; 30:547-52. [PMID: 11210164 DOI: 10.1093/jjco/hyd142] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [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: 11/14/2022] Open
Abstract
BACKGROUND Cisplatin-based chemotherapy is the mainstay of the treatment for advanced urothelial cancer, but patients with renal insufficiency before therapy are usually contraindicated to receiving platinum-based chemotherapy. Paclitaxel is one of the most promising agents against advanced urothelial carcinoma in recent trials and it can be easily tolerated even in patients with compromised renal function. We conducted a study in order to evaluate the efficacy and safety of paclitaxel as a first-line therapy in advanced urothelial carcinoma patients. METHODS Thirteen advanced chemo-naive urothelial carcinoma patients with a median age of 71 years were studied, seven of them demonstrating renal insufficiency (pretreatment serum creatinine > or = 1.5 mg/dl). All 13 patients received a minimum of two cycles of paclitaxel 175 mg/m2, delivered by intravenous infusion for 3 h every 3 weeks. RESULTS Four of the 13 patients responded to treatment, a response rate of 30.8%, with two of these achieving complete remission and two showing partial responses. The median overall survival period of all 13 patients was nine months (95% Cl: 6.51-11.49) and our study revealed a statistical tendency in the difference of median overall survival time between responders and non-responders (13 months versus 7.5 months, log-rank p = 0.038), although the number of cases was limited. The differences in response rate and median overall survival time, comparing patients with renal insufficiency and those with normal renal function, were not significant. Treatment-related toxicity was mild, with only two (15.4%) patients suffering from grade 3-4 leukopenia. No treatment-related mortality was noted. CONCLUSIONS Single-agent paclitaxel can be used as a first-line therapy in advanced urothelial carcinoma patients, and is especially suitable for those with pretreatment renal insufficiency, since the antitumor activity is significant while toxicity is well tolerated.
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Affiliation(s)
- M H Yang
- Division of Medical Oncology, Department of Medicine, Taipei Veterans General Hospital, Taiwan
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Yen CC, Liu JH, Wang WS, Fan FS, Chiou TJ, Tai CJ, Yang MH, Chao TC, Hsiao LT, Chen PM. Immunophenotypic and genotypic characteristics of chronic myelogenous leukemia in blast crisis. Zhonghua Yi Xue Za Zhi (Taipei) 2000; 63:785-91. [PMID: 11155753] [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: 02/18/2023]
Abstract
BACKGROUND Chronic myelogenous leukemia (CML) may transform into blast crisis (BC) if not properly treated. Among patients with transformation, 20% to 30% will develop BC with lymphoid-associated antigens (Ly-BC), and the remaining cases with myeloid-associated antigens (My-BC) or with both (Mix-BC). In this study, we investigated the lineage of blast cells in CML-BC using immunophenotypic and genetic analyses and analyzed the prognostic significance of genotypic change in CML-BC. METHODS Twenty-one patients with CML-BC diagnosed at the Taipei Veterans General Hospital from 1982 to 1992 were included. Immunophenotyping was done by using the avidin-biotin immunoperoxidase technique. Genetic analyses were carried out by using Southern Blot hybridization. The prognostic influence of genotypic change was analyzed. RESULTS Thirteen patients (61.9%) expressed myeloid-associated antigens, one patient (4.8%) expressed megakaryoblast-associated antigens, four patients (19%) expressed B lymphoid-associated antigens and three patients (14.3%) expressed both myeloid and B lymphoid antigens. Clonal rearrangement of the immunoglobulin heavy chain (IgH) gene was found in six cases. Among them, four expressed B lymphoid markers only and two expressed both myeloid and B lymphoid markers. Patients with clonal IgH gene rearrangement tended to have a better response to chemotherapy (50% vs 8.3%, p = 0.08) and significantly longer survival (median survival, 5 months vs 3 months, p < 0.05) than did those with a germline configuration. CONCLUSIONS Clonal rearrangement of the IgH gene was found mostly in cases of Ly-BC and Mix-BC. We found that CML-BC with clonal rearrangement of the IgH gene had a more favorable prognosis than in cases with a germline configuration.
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Affiliation(s)
- C C Yen
- Section of Medical Oncology, Department of Medicine, Taipei Veterans General Hospital, National Yang-Ming University School of Medicine, Taipei, Taiwan, ROC
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