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Wang H, Piao Z, Ma H, Cao L, Liu J, Wu J. [Short-term exposure to gossypol causes reversible reproductive toxicity and nephrotoxicity in mice]. Nan Fang Yi Ke Da Xue Xue Bao 2023; 43:251-256. [PMID: 36946045 PMCID: PMC10034549 DOI: 10.12122/j.issn.1673-4254.2023.02.13] [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: 03/23/2023]
Abstract
OBJECTIVE To study the toxic effects of short-term exposure to gossypol on the testis and kidney in mice and whether these effects are reversible. METHODS Twenty 7 to 8-week-old male mice were randomized into blank control group, solvent control group, gossypol treatment group and drug withdrawal group. In the former 3 groups, the mice were subjected to daily intragastric administration of 0.3 mL of purified water, 1% sodium carboxymethylcellulose solution, and 30 mg/mL gossypol solution for 14 days, respectively; In the drug withdrawal group, the mice were treated with gossypol solution in the same manner for 14 days followed by treatment with purified water for another 14 days. After the last administration, the mice were euthanized and tissue samples were collected. The testicular tissue was weighed and observed microscopically with HE and PAS staining; the kidney tissue was stained with HE and examined for mitochondrial ATPase activity. RESULTS Compared with those in the control group, the mice with gossypol exposure showed reduced testicular seminiferous epithelial cells with rounded seminiferous tubules, enlarged space between the seminiferous tubules, interstitium atrophy of the testis, and incomplete differentiation of the spermatogonia. The gossypol-treated mice also presented with complete, non-elongated spermatids, a large number of cells in the state of round spermatids, and negativity for acrosome PAS reaction; diffuse renal mesangial cell hyperplasia, increased mesangial matrix, and adhesion of the mesangium to the wall of the renal capsule were observed, with significantly shrinkage or even absence of the lumens of the renal capsules and reduced kidney mitochondrial ATPase activity. Compared with the gossypol-treated mice, the mice in the drug withdrawal group showed obvious recovery of morphologies of the testis and the kidney, acrosome PAS reaction and mitochondrial ATPase activity. CONCLUSIONS Shortterm treatment with gossypol can cause reproductive toxicity and nephrotoxicity in mice, but these toxic effects can be reversed after drug withdrawal.
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Affiliation(s)
- H Wang
- Demonstration Center for Experimental Basic Medicine Education, Wuhan University, Wuhan 430071, China
| | - Z Piao
- School of Stomatology, Wuhan University, Wuhan 430071, China
| | - H Ma
- School of Stomatology, Wuhan University, Wuhan 430071, China
| | - L Cao
- School of Stomatology, Wuhan University, Wuhan 430071, China
| | - J Liu
- Demonstration Center for Experimental Basic Medicine Education, Wuhan University, Wuhan 430071, China
| | - J Wu
- Demonstration Center for Experimental Basic Medicine Education, Wuhan University, Wuhan 430071, China
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2
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Chowdhury MM, Piao Z, Albaghdadi MS, Coughlin PA, Rudd JHF, Tearney GJ, Jaffer FA. Intravascular Fluorescence Molecular Imaging of Atherosclerosis. Methods Mol Biol 2022; 2419:853-872. [PMID: 35238006 PMCID: PMC9052094 DOI: 10.1007/978-1-0716-1924-7_52] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Optical molecular imaging using near-infrared fluorescence (NIRF) light is an emerging high-resolution imaging approach to image a wide range of molecular and cellular species in vivo. Imaging using NIR wavelengths (650-900 nm) enables deeper photon penetration into tissue and reduced tissue autofluorescence, resulting in higher sensitivity to detect exogenously administered NIR fluorophores (injectable molecular imaging agents). Greater imaging depth of several centimeters is further achievable in the NIR window as blood absorption is as an order of magnitude lower than in the visible range. Furthermore, as optical imaging is routinely performed in the cardiac catheterization laboratory (e.g., optical coherence tomography), intravascular NIRF offers a promising translational approach for clinical coronary and peripheral arterial imaging. To this point, the first human intravascular NIRF imaging study recently demonstrated the ability to detect NIR autofluorescence in patients with coronary atherosclerosis. This study provides a foundation for targeted intravascular NIRF molecular imaging studies in coronary patients. In this chapter, we detail system engineering, imaging agents and translational applications of intravascular NIRF molecular imaging.
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Affiliation(s)
- Mohammed M Chowdhury
- Cardiovascular Research Center, Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
- Division of Vascular Surgery, Department of Surgery, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
| | - Zhonglie Piao
- Wellman Center for Photomedicine, Harvard Medical School and Massachusetts General Hospital, Boston, MA, USA
| | - Mazen S Albaghdadi
- Cardiovascular Research Center, Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Patrick A Coughlin
- Division of Vascular Surgery, Department of Surgery, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
| | - James H F Rudd
- Division of Cardiovascular Medicine, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
| | - Guillermo J Tearney
- Wellman Center for Photomedicine, Harvard Medical School and Massachusetts General Hospital, Boston, MA, USA
- Department of Pathology, Harvard Medical School and Massachusetts General Hospital, Boston, MA, USA
| | - Farouc A Jaffer
- Cardiovascular Research Center, Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
- Wellman Center for Photomedicine, Harvard Medical School and Massachusetts General Hospital, Boston, MA, USA.
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3
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Kellnberger S, Wissmeyer G, Albaghdadi M, Piao Z, Li W, Mauskapf A, Rauschendorfer P, Tearney GJ, Ntziachristos V, Jaffer FA. Intravascular molecular-structural imaging with a miniaturized integrated near-infrared fluorescence and ultrasound catheter. J Biophotonics 2021; 14:e202100048. [PMID: 34164943 PMCID: PMC8492488 DOI: 10.1002/jbio.202100048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 05/11/2021] [Accepted: 06/10/2021] [Indexed: 05/29/2023]
Abstract
Coronary artery disease (CAD) remains a leading cause of mortality and warrants new imaging approaches to better guide clinical care. We report on a miniaturized, hybrid intravascular catheter and imaging system for comprehensive coronary artery imaging in vivo. Our catheter exhibits a total diameter of 1.0 mm (3.0 French), equivalent to standalone clinical intravascular ultrasound (IVUS) catheters but enables simultaneous near-infrared fluorescence (NIRF) and IVUS molecular-structural imaging. We demonstrate NIRF-IVUS imaging in vitro in coronary stents using NIR fluorophores, and compare NIRF signal strengths for prism and ball lens sensor designs in both low and high scattering media. Next, in vivo intravascular imaging in pig coronary arteries demonstrates simultaneous, co-registered molecular-structural imaging of experimental CAD inflammation on IVUS and distance-corrected NIRF images. The obtained results suggest substantial potential for the NIRF-IVUS catheter to advance standalone IVUS, and enable comprehensive phenotyping of vascular disease to better assess and treat patients with CAD.
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Affiliation(s)
- Stephan Kellnberger
- Cardiovascular Research Center, Cardiology Division, Massachusetts General Hospital, Boston, MA 02114
| | - Georg Wissmeyer
- Cardiovascular Research Center, Cardiology Division, Massachusetts General Hospital, Boston, MA 02114
| | - Mazen Albaghdadi
- Cardiovascular Research Center, Cardiology Division, Massachusetts General Hospital, Boston, MA 02114
| | - Zhonglie Piao
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA 02114
| | - Wenzhu Li
- Cardiovascular Research Center, Cardiology Division, Massachusetts General Hospital, Boston, MA 02114
| | - Adam Mauskapf
- Cardiovascular Research Center, Cardiology Division, Massachusetts General Hospital, Boston, MA 02114
| | - Philipp Rauschendorfer
- Institute of Biological and Medical Imaging, Helmholtz Zentrum München, Neuherberg, Germany
- Chair of Biological Imaging, Central Institute for Translational Cancer Research (TranslaTUM), Technical University of Munich, Germany
| | - Guillermo J. Tearney
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA 02114
| | - Vasilis Ntziachristos
- Institute of Biological and Medical Imaging, Helmholtz Zentrum München, Neuherberg, Germany
- Chair of Biological Imaging, Central Institute for Translational Cancer Research (TranslaTUM), Technical University of Munich, Germany
| | - Farouc A. Jaffer
- Cardiovascular Research Center, Cardiology Division, Massachusetts General Hospital, Boston, MA 02114
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA 02114
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4
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Osborn EA, Ughi GJ, Verjans JW, Piao Z, Gerbaud E, Albaghdadi M, Khraishah H, Kassab MB, Takx RAP, Cui J, Mauskapf A, Shen C, Yeh RW, Klimas MT, Tawakol A, Tearney GJ, Jaffer FA. Intravascular Molecular-Structural Assessment of Arterial Inflammation in Preclinical Atherosclerosis Progression. JACC Cardiovasc Imaging 2021; 14:2265-2267. [PMID: 34419392 DOI: 10.1016/j.jcmg.2021.06.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 06/11/2021] [Accepted: 06/17/2021] [Indexed: 10/20/2022]
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Huang L, Tang S, Zou R, Ouyang KX, Piao Z. The three-dimensional evaluation of positional change in mandibular condyle after intraoral vertical ramus osteotomy. J Stomatol Oral Maxillofac Surg 2020; 122:477-481. [PMID: 32977041 DOI: 10.1016/j.jormas.2020.09.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 09/07/2020] [Accepted: 09/10/2020] [Indexed: 10/23/2022]
Abstract
OBJECTIVES The purpose of this study was to compare the changes of the condylar axis, the anteroposterior condylar position relative to the glenoid fossa, after intraoral vertical ramus osteotomy (IVRO). STUDY DESIGN 21 patients diagnosed as skeletal class III malocclusion underwent IVRO and were followed according to the authors' postoperative management regimen. The three-dimensional positions of the condyles were evaluated by cone-beam computerized tomography (CBCT) at pre-op, post-op, and at follow-up. CBCT images were referenced to assess the condylar axis change and the anteroposterior condylar position in the glenoid fossa. A repeated-measures analysis of variance (P<0.05) also was performed. RESULTS After surgery, both the axial condylar angles and the anteroposterior condylar position were significantly different (P<0.05). The coronal condylar axis rotated outwardly. The anteroposterior condylar position in the glenoid fossa had moved from the concentric to the anterior position. But the condyle changes between post-op and follow-up (P>0.05) were insignificant. CONCLUSIONS With postoperative intermaxillary elastic traction, the condyles changed their positions physiologically for newly established jaw movement after IVRO.
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Affiliation(s)
- L Huang
- Department of Oral and Maxillofacial Surgery, Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Stomatology Hospital of Guangzhou Medical University, Guangzhou 510140, China
| | - S Tang
- Department of Oral and Maxillofacial Surgery, Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Stomatology Hospital of Guangzhou Medical University, Guangzhou 510140, China
| | - R Zou
- Department of Oral and Maxillofacial Surgery, Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Stomatology Hospital of Guangzhou Medical University, Guangzhou 510140, China
| | - K X Ouyang
- Department of Oral and Maxillofacial Surgery, Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Stomatology Hospital of Guangzhou Medical University, Guangzhou 510140, China
| | - Z Piao
- Department of Oral and Maxillofacial Surgery, Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Stomatology Hospital of Guangzhou Medical University, Guangzhou 510140, China.
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Chowdhury MM, Singh K, Albaghdadi MS, Khraishah H, Mauskapf A, Kessinger CW, Osborn EA, Kellnberger S, Piao Z, Lino Cardenas CL, Grau MS, Jaff MR, Rosenfield K, Libby P, Edelman ER, Lindsay ME, Tearney GJ, Jaffer FA. Paclitaxel Drug-Coated Balloon Angioplasty Suppresses Progression and Inflammation of Experimental Atherosclerosis in Rabbits. JACC Basic Transl Sci 2020; 5:685-695. [PMID: 32760856 PMCID: PMC7393431 DOI: 10.1016/j.jacbts.2020.04.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 04/13/2020] [Accepted: 04/13/2020] [Indexed: 12/31/2022]
Abstract
Paclitaxel drug-coated balloons (DCBs) reduce restenosis, but their overall safety has recently raised concerns. This study hypothesized that DCBs could lessen inflammation and reduce plaque progression. Using 25 rabbits with cholesterol feeding- and balloon injury-induced lesions, DCB-percutaneous transluminal angioplasty (PTA), plain PTA, or sham-PTA (balloon insertion without inflation) was investigated using serial intravascular near-infrared fluorescence-optical coherence tomography and serial intravascular ultrasound. In these experiments, DCB-PTA reduced inflammation and plaque burden in nonobstructive lesions compared with PTA or sham-PTA. These findings indicated the potential for DCBs to serve safely as regional anti-atherosclerosis therapy.
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Key Words
- 2D, 2-dimensional
- CSA, cross-sectional area
- DCB, drug-coated balloon
- EEM, external elastic membrane
- IVUS, intravascular ultrasound
- NIRF, near-infrared fluorescence
- OCT, optical coherence tomography
- PAD, peripheral arterial disease
- PAV, percent atheroma volume
- PB, plaque burden
- PTA, percutaneous transluminal angioplasty
- PTX, paclitaxel
- TAV, total atheroma volume
- atherosclerosis
- drug-coated balloon
- imaging
- inflammation
- peripheral arterial disease
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Affiliation(s)
- Mohammed M. Chowdhury
- Cardiovascular Research Center, Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
- Department of Vascular and Endovascular Surgery, Department of Surgery, Addenbrooke’s Hospital, University of Cambridge, Cambridge, United Kingdom
| | - Kanwarpal Singh
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Mazen S. Albaghdadi
- Cardiovascular Research Center, Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Haitham Khraishah
- Cardiovascular Research Center, Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
- Cardiovascular Division, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Adam Mauskapf
- Cardiovascular Research Center, Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Chase W. Kessinger
- Cardiovascular Research Center, Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Eric A. Osborn
- Cardiovascular Research Center, Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
- Cardiovascular Division, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Stephan Kellnberger
- Cardiovascular Research Center, Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Zhonglie Piao
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Christian L. Lino Cardenas
- Cardiovascular Research Center, Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Madeleine S. Grau
- Cardiovascular Research Center, Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Michael R. Jaff
- Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Kenneth Rosenfield
- Cardiovascular Research Center, Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Peter Libby
- Cardiovascular Division, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
| | - Elazer R. Edelman
- Cardiovascular Division, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, Massachusetts
| | - Mark E. Lindsay
- Cardiovascular Research Center, Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Guillermo J. Tearney
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
- Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Farouc A. Jaffer
- Cardiovascular Research Center, Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
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7
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Ma B, He L, Xia Y, Chi L, Piao Z, Sun X, Dai J, Yang C, Shen F. The Value of Serum Amyloid A on Early Diagnosing and Prognosis for Perioperative Patients with Extracorporeal Circulation. Indian J Pharm Sci 2020. [DOI: 10.36468/pharmaceutical-sciences.spl.29] [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: 11/22/2022] Open
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8
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Yin B, Piao Z, Nishimiya K, Hyun C, Gardecki JA, Mauskapf A, Jaffer FA, Tearney GJ. 3D cellular-resolution imaging in arteries using few-mode interferometry. Light Sci Appl 2019; 8:104. [PMID: 31798843 PMCID: PMC6872567 DOI: 10.1038/s41377-019-0211-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 10/15/2019] [Accepted: 10/29/2019] [Indexed: 06/08/2023]
Abstract
Cross-sectional visualisation of the cellular and subcellular structures of human atherosclerosis in vivo is significant, as this disease is fundamentally caused by abnormal processes that occur at this scale in a depth-dependent manner. However, due to the inherent resolution-depth of focus tradeoff of conventional focusing optics, today's highest-resolution intravascular imaging technique, namely, optical coherence tomography (OCT), is unable to provide cross-sectional images at this resolution through a coronary catheter. Here, we introduce an intravascular imaging system and catheter based on few-mode interferometry, which overcomes the depth of focus limitation of conventional high-numerical-aperture objectives and enables three-dimensional cellular-resolution intravascular imaging in vivo by a submillimetre diameter, flexible catheter. Images of diseased cadaver human coronary arteries and living rabbit arteries were acquired with this device, showing clearly resolved cellular and subcellular structures within the artery wall, such as individual crystals, smooth muscle cells, and inflammatory cells. The capability of this technology to enable cellular-resolution, cross-sectional intravascular imaging will make it possible to study and diagnose human coronary disease with much greater precision in the future.
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Affiliation(s)
- Biwei Yin
- Wellman Center for Photomedicine, Harvard Medical School and Massachusetts General Hospital, Boston, MA 02114 USA
| | - Zhonglie Piao
- Wellman Center for Photomedicine, Harvard Medical School and Massachusetts General Hospital, Boston, MA 02114 USA
| | - Kensuke Nishimiya
- Wellman Center for Photomedicine, Harvard Medical School and Massachusetts General Hospital, Boston, MA 02114 USA
| | - Chulho Hyun
- Wellman Center for Photomedicine, Harvard Medical School and Massachusetts General Hospital, Boston, MA 02114 USA
| | - Joseph A. Gardecki
- Wellman Center for Photomedicine, Harvard Medical School and Massachusetts General Hospital, Boston, MA 02114 USA
| | - Adam Mauskapf
- Cardiovascular Research Center and Cardiology Division, Harvard Medical School and Massachusetts General Hospital, Boston, MA 02114 USA
| | - Farouc A. Jaffer
- Wellman Center for Photomedicine, Harvard Medical School and Massachusetts General Hospital, Boston, MA 02114 USA
- Cardiovascular Research Center and Cardiology Division, Harvard Medical School and Massachusetts General Hospital, Boston, MA 02114 USA
| | - Guillermo J. Tearney
- Wellman Center for Photomedicine, Harvard Medical School and Massachusetts General Hospital, Boston, MA 02114 USA
- Department of Pathology, Harvard Medical School and Massachusetts General Hospital, Boston, MA 02114 USA
- Harvard-MIT Division of Health Sciences and Technology, Cambridge, MA 02139 USA
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Yang Z, Liang Q, Ouyang K, Piao Z. Amniotic band syndrome with Tessier number 4 and 7 clefts: a case report. Br J Oral Maxillofac Surg 2019; 57:816-817. [DOI: 10.1016/j.bjoms.2019.07.003] [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] [Received: 04/15/2019] [Accepted: 07/03/2019] [Indexed: 10/26/2022]
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10
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Lin D, Zhang L, Mei J, Chen J, Piao Z, Lee G, Dong Y. Mutation of the rice TCM12 gene encoding 2,3-bisphosphoglycerate-independent phosphoglycerate mutase affects chlorophyll synthesis, photosynthesis and chloroplast development at seedling stage at low temperatures. Plant Biol (Stuttg) 2019; 21:585-594. [PMID: 30803106 DOI: 10.1111/plb.12978] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 02/19/2019] [Indexed: 06/09/2023]
Abstract
Glycolysis is a central metabolic pathway that provides energy and products of primary metabolites. 2,3-Biphosphoglycerate-independent phosphoglycerate mutase (iPGAM) is a key enzyme that catalyses the reversible interconversion of 3-phosphoglycerate (3-PGA) to 2-phosphoglycerate (2-PGA) in glycolysis. Low temperature is a common abiotic stress in rice production. However, the mechanism for rice iPGAM genes is not fully understood at low temperature. In this study, the rice mutant tcm12, with chlorosis, malformed chloroplasts and impaired photosynthesis, was grown at a low temperature (<20 °C) to the three-leaf stage, while the normal phenotype at 32 °C was used. Chlorophyll fluorescence analysis and transmission electron microscopy were used to examine features of the tcm12 mutant. The inheritance behaviour and function of TCM12 were then analysed thorough map-based cloning, transgenic complementation and subcellular localisation. The thermo-sensitive chlorosis phenotype was caused by a single nucleotide mutation (T→C) on the fifth exon of TCM12 (LOC_Os12g35040) encoding iPGAM, localised to both nucleus and membranes. In addition, TCM12 was constitutively expressed, and its disruption resulted in down-regulation of some genes associated with chlorophyll biosynthesis and photosynthesis at low temperatures (20 °C). This is the first report of the involvement of rice iPGAM gene in chlorophyll synthesis, photosynthesis and chloroplast development, providing new insights into the mechanisms underlying early growth of rice at low temperatures.
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Affiliation(s)
- D Lin
- College of Life Sciences, Shanghai Normal University, Shanghai, China
| | - L Zhang
- College of Life Sciences, Shanghai Normal University, Shanghai, China
| | - J Mei
- College of Life Sciences, Shanghai Normal University, Shanghai, China
| | - J Chen
- College of Life Sciences, Shanghai Normal University, Shanghai, China
- Shanghai Institute for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Z Piao
- Crop Breeding and Cultivation Research Institute, Shanghai Academy of Agricultural Sciences, Fengxian District, Shanghai 3, China
| | - G Lee
- National Institute of Agricultural Science, Jeon Ju, Korea
| | - Y Dong
- College of Life Sciences, Shanghai Normal University, Shanghai, China
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11
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Nishimiya K, Yin B, Piao Z, Ryu J, Osman H, Leung HM, Sharma G, Liang CP, Gardecki JA, Zheng H, Shimokawa H, Tearney GJ. Micro-Optical Coherence Tomography for Endothelial Cell Visualization in the Coronary Arteries. JACC Cardiovasc Imaging 2019; 12:1878-1880. [PMID: 30878431 DOI: 10.1016/j.jcmg.2019.01.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 01/11/2019] [Accepted: 01/27/2019] [Indexed: 10/27/2022]
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12
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Piao Z, Singh K, Chowdhury M, Gardecki J, Nishimiya K, Yin B, Beatty M, Bablouzian A, Giddings S, Mauskapf A, Jaffer FA, Tearney G. TCT-56 High-resolution Intravascular OCT-NIRF Molecular Imaging for In Vivo Assessment of Inflammation in Atherosclerosis and Vascular Injury. J Am Coll Cardiol 2018. [DOI: 10.1016/j.jacc.2018.08.1143] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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13
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Nishimiya K, Yin B, Piao Z, Osman H, Ryu J, Leung HM, Sharma G, Gardecki JA, Tearney GJ. P2271Super high-resolution OCT for endothelial cell visualization in the coronary arteries. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p2271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- K Nishimiya
- Massachusetts General Hospital, Wellman Center for Photomedicine, Boston, United States of America
| | - B Yin
- Massachusetts General Hospital, Wellman Center for Photomedicine, Boston, United States of America
| | - Z Piao
- Massachusetts General Hospital, Wellman Center for Photomedicine, Boston, United States of America
| | - H Osman
- Massachusetts General Hospital, Wellman Center for Photomedicine, Boston, United States of America
| | - J Ryu
- Massachusetts General Hospital, Wellman Center for Photomedicine, Boston, United States of America
| | - H M Leung
- Massachusetts General Hospital, Wellman Center for Photomedicine, Boston, United States of America
| | - G Sharma
- Massachusetts General Hospital, Wellman Center for Photomedicine, Boston, United States of America
| | - J A Gardecki
- Massachusetts General Hospital, Wellman Center for Photomedicine, Boston, United States of America
| | - G J Tearney
- Massachusetts General Hospital, Wellman Center for Photomedicine, Department of Pathology, Boston, United States of America
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14
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Atabaev TS, Piao Z, Molkenova A. Carbon Dots Doped with Dysprosium: A Bimodal Nanoprobe for MRI and Fluorescence Imaging. J Funct Biomater 2018; 9:jfb9020035. [PMID: 29783645 PMCID: PMC6023474 DOI: 10.3390/jfb9020035] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 05/07/2018] [Accepted: 05/14/2018] [Indexed: 11/26/2022] Open
Abstract
In recent years, functional nanoprobes with multiple imaging modalities have become an emerging field of biomedical research. In this preliminary study, we utilized a facile hydrothermal method for the preparation of magneto-fluorescent bimodal carbon dots doped with dysprosium (Dy-CDs). The prepared Dy-CDs have shown a good colloidal stability in a water solution and strong blue–green fluorescence, with a maximum at 452 nm. In addition, the excellent transverse relaxivity of the prepared Dy-CDs (r2 = 7.42 ± 0.07 mM−1s−1) makes them also suitable for T2-weighted magnetic resonance imaging (MRI). Thus, synthesized Dy-CDs could be potentially utilized for both MRI and fluorescence imaging of living cells.
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Affiliation(s)
- Timur Sh Atabaev
- Department of Chemistry, School of Science and Technology, Nazarbayev University, Astana 010000, Kazakhstan.
| | - Zhonglie Piao
- Wellman Center for Photomedicine, Harvard Medical School and Massachusetts General Hospital, Boston, MA 02114, USA.
| | - Anara Molkenova
- Department of Chemistry, School of Science and Technology, Nazarbayev University, Astana 010000, Kazakhstan.
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15
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Nishimiya K, Yin B, Piao Z, Sharma G, Osman H, Gardecki JA, Tearney GJ. SUPER HIGH RESOLUTION µOCT FOR ENDOTHELIAL CELL VISUALIZATION IN THE CORONARY ARTERIES EX VIVO. J Am Coll Cardiol 2018. [DOI: 10.1016/s0735-1097(18)31891-6] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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16
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Bui NQ, Cho SW, Moorthy MS, Park SM, Piao Z, Nam SY, Kang HW, Kim CS, Oh J. In vivo photoacoustic monitoring using 700-nm region Raman source for targeting Prussian blue nanoparticles in mouse tumor model. Sci Rep 2018; 8:2000. [PMID: 29386518 PMCID: PMC5792574 DOI: 10.1038/s41598-018-20139-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [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: 10/02/2017] [Accepted: 01/08/2018] [Indexed: 11/26/2022] Open
Abstract
Photoacoustic imaging (PAI) is a noninvasive imaging tool to visualize optical absorbing contrast agents. Due to high ultrasonic resolution and superior optical sensitivity, PAI can be used to monitor nanoparticle-mediated cancer therapy. The current study synthesized Food and Drug Administration-approved Prussian blue (PB) in the form of nanoparticles (NPs) with the peak absorption at 712 nm for photoacoustically imaging tumor-bearing mouse models. To monitor PB NPs from the background tissue in vivo, we also developed a new 700-nm-region stimulated Raman scattering (SRS) source (pulse energy up to 200 nJ and repetition rate up to 50 kHz) and implemented optical-resolution photoacoustic microscopy (OR-PAM). The SRS-assisted OR-PAM system was able to monitor PB NPs in the tumor model with micrometer resolution. Due to strong light absorption at 712 nm, the developed SRS light yielded a two-fold higher contrast from PB NPs, in comparison with a 532-nm pumping source. The proposed laser source involved cost-effective and simple system implementation along with high compatibility with the fiber-based OR-PAM system. The study highlights the OR-PAM system in conjunction with the tunable-color SRS light source as a feasible tool to assist NP-mediated cancer therapy.
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Affiliation(s)
- Nhat Quang Bui
- Interdisciplinary Program of Biomedical Mechanical & Electrical Engineering, Pukyong National University, Busan, 48513, Republic of Korea
| | - Soon-Woo Cho
- Department of Cogno-Mechatronics Engineering, Pusan National University, Busan, 46241, Republic of Korea
| | - Madhappan Santha Moorthy
- Center for Marine-Integrated Biomedical Technology, Pukyong National University, Busan, 48513, Republic of Korea
| | - Sang Min Park
- Department of Cogno-Mechatronics Engineering, Pusan National University, Busan, 46241, Republic of Korea
| | - Zhonglie Piao
- Department of Cogno-Mechatronics Engineering, Pusan National University, Busan, 46241, Republic of Korea.,Massachusetts General Hospital, Wellman Center for Photomedicine, Boston, 02114, USA
| | - Seung Yun Nam
- Interdisciplinary Program of Biomedical Mechanical & Electrical Engineering, Pukyong National University, Busan, 48513, Republic of Korea.,Center for Marine-Integrated Biomedical Technology, Pukyong National University, Busan, 48513, Republic of Korea.,Department of Biomedical Engineering, Pukyong National University, Busan, 48513, Republic of Korea
| | - Hyun Wook Kang
- Interdisciplinary Program of Biomedical Mechanical & Electrical Engineering, Pukyong National University, Busan, 48513, Republic of Korea.,Center for Marine-Integrated Biomedical Technology, Pukyong National University, Busan, 48513, Republic of Korea.,Department of Biomedical Engineering, Pukyong National University, Busan, 48513, Republic of Korea
| | - Chang-Seok Kim
- Department of Cogno-Mechatronics Engineering, Pusan National University, Busan, 46241, Republic of Korea.
| | - Junghwan Oh
- Interdisciplinary Program of Biomedical Mechanical & Electrical Engineering, Pukyong National University, Busan, 48513, Republic of Korea. .,Center for Marine-Integrated Biomedical Technology, Pukyong National University, Busan, 48513, Republic of Korea. .,Department of Biomedical Engineering, Pukyong National University, Busan, 48513, Republic of Korea.
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17
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Nishimiya K, Matsumoto Y, Wang H, Piao Z, Ohyama K, Uzuka H, Hao K, Tsuburaya R, Takahashi J, Ito K, Shimokawa H. Absence of adventitial vasa vasorum formation at the coronary segment with myocardial bridge - An optical coherence tomography study. Int J Cardiol 2017; 250:275-277. [PMID: 28993001 DOI: 10.1016/j.ijcard.2017.09.211] [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] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2017] [Revised: 09/25/2017] [Accepted: 09/28/2017] [Indexed: 02/08/2023]
Abstract
BACKGROUND Myocardial bridge (MB) is a myocardial bundle through which coronary segment tunnels and could compress coronary arteries causing myocardial ischemia. However, the characteristic structural findings of MB remain to be fully elucidated. Recently, we demonstrated that optical coherence tomography (OCT) enables us to visualize adventitial vasa vasorum (VV) formation in humans. In this study, we examined adventitial VV formation at the coronary segment with MB in humans using OCT. METHODS We examined 15 consecutive patients with suspected angina pectoris and MB in the left anterior descending (LAD) coronary arteries but no angiographic coronary stenosis. MB was detected on coronary angiography as a segment with milking effect. We performed intracoronary OCT imaging along the entire LAD. Morphometric analysis was performed at MB and proximal/distal segments at every 1mm. RESULTS OCT examination showed the absence of adventitial VV formation at MB in the LAD, while VV was clearly noted at both the proximal and distal reference segments. Adventitial VV area was significantly less at MB compared with the proximal or distal references. CONCLUSIONS These results with OCT imaging indicate that coronary segments with MB lack adventitial VV formation in humans, suggesting that MB could influence morphological and functional changes of the coronary artery.
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Affiliation(s)
- Kensuke Nishimiya
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan; Wellman Center for Photomedicine, Harvard Medical School and Massachusetts General Hospital, Boston, MA, USA
| | - Yasuharu Matsumoto
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Hongxin Wang
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Zhonglie Piao
- Wellman Center for Photomedicine, Harvard Medical School and Massachusetts General Hospital, Boston, MA, USA
| | - Kazuma Ohyama
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Hironori Uzuka
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Kiyotaka Hao
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Ryuji Tsuburaya
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Jun Takahashi
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Kenta Ito
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan
| | - Hiroaki Shimokawa
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan.
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18
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Piao Z, Zeng L, Chen Z, Kim CS. Q-switched Erbium-doped fiber laser at 1600 nm for photoacoustic imaging application. Appl Phys Lett 2016; 108:143701. [PMID: 27110032 PMCID: PMC4826380 DOI: 10.1063/1.4945711] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 03/18/2016] [Indexed: 05/06/2023]
Abstract
We present a nanosecond Q-switched Erbium-doped fiber (EDF) laser system operating at 1600 nm with a tunable repetition rate from 100 kHz to 1 MHz. A compact fiber coupled, acousto-optic modulator-based EDF ring cavity was used to generate a nanosecond seed laser at 1600 nm, and a double-cladding EDF based power amplifier was applied to achieve the maximum average power of 250 mW. In addition, 12 ns laser pulses with the maximum pulse energy of 2.4 μJ were obtained at 100 kHz. Furthermore, the Stokes shift by Raman scattering over a 25 km long fiber was measured, indicating that the laser can be potentially used to generate the high repetition rate pulses at the 1.7 μm region. Finally, we detected the photoacoustic signal from a human hair at 200 kHz repetition rate with a pulse energy of 1.2 μJ, which demonstrates that a Q-switched Er-doped fiber laser can be a promising light source for the high speed functional photoacoustic imaging.
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Affiliation(s)
| | - Lvming Zeng
- Beckman Laser Institute, Department of Biomedical Engineering, University of California , Irvine, California 92612, USA
| | - Zhongping Chen
- Beckman Laser Institute, Department of Biomedical Engineering, University of California , Irvine, California 92612, USA
| | - Chang-Seok Kim
- Department of Cogno-Mechatronics Engineering, Pusan National University , Busan 609-735, South Korea
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19
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Li J, Ma T, Mohar D, Steward E, Yu M, Piao Z, He Y, Shung KK, Zhou Q, Patel PM, Chen Z. Ultrafast optical-ultrasonic system and miniaturized catheter for imaging and characterizing atherosclerotic plaques in vivo. Sci Rep 2015; 5:18406. [PMID: 26678300 PMCID: PMC4683418 DOI: 10.1038/srep18406] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [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: 06/26/2015] [Accepted: 11/17/2015] [Indexed: 12/17/2022] Open
Abstract
Atherosclerotic coronary artery disease (CAD) is the number one cause of death worldwide. The majority of CAD-induced deaths are due to the rupture of vulnerable plaques. Accurate assessment of plaques is crucial to optimize treatment and prevent death in patients with CAD. Current diagnostic techniques are often limited by either spatial resolution or penetration depth. Several studies have proved that the combined use of optical and ultrasonic imaging techniques increase diagnostic accuracy of vulnerable plaques. Here, we introduce an ultrafast optical-ultrasonic dual-modality imaging system and flexible miniaturized catheter, which enables the translation of this technology into clinical practice. This system can perform simultaneous optical coherence tomography (OCT)-intravascular ultrasound (IVUS) imaging at 72 frames per second safely in vivo, i.e., visualizing a 72 mm-long artery in 4 seconds. Results obtained in atherosclerotic rabbits in vivo and human coronary artery segments show that this ultrafast technique can rapidly provide volumetric mapping of plaques and clearly identify vulnerable plaques. By providing ultrafast imaging of arteries with high resolution and deep penetration depth simultaneously, this hybrid IVUS-OCT technology opens new and safe opportunities to evaluate in real-time the risk posed by plaques, detect vulnerable plaques, and optimize treatment decisions.
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Affiliation(s)
- Jiawen Li
- Beckman Laser Institute, University of California, Irvine, 1002 Health Sciences Rd. Irvine, CA 92617, USA.,Department of Biomedical Engineering, University of California, Irvine, Irvine, CA, 92697-2700, USA
| | - Teng Ma
- NIH Ultrasonic Transducer Resource Center, University of Southern California, Los Angeles, CA 90089, USA
| | - Dilbahar Mohar
- School of Medicine, University of California, Irvine, 101 The City Drive South, Orange, CA, 92868, USA
| | - Earl Steward
- School of Medicine, University of California, Irvine, 101 The City Drive South, Orange, CA, 92868, USA
| | - Mingyue Yu
- NIH Ultrasonic Transducer Resource Center, University of Southern California, Los Angeles, CA 90089, USA
| | - Zhonglie Piao
- Beckman Laser Institute, University of California, Irvine, 1002 Health Sciences Rd. Irvine, CA 92617, USA
| | - Youmin He
- Beckman Laser Institute, University of California, Irvine, 1002 Health Sciences Rd. Irvine, CA 92617, USA
| | - K Kirk Shung
- NIH Ultrasonic Transducer Resource Center, University of Southern California, Los Angeles, CA 90089, USA
| | - Qifa Zhou
- NIH Ultrasonic Transducer Resource Center, University of Southern California, Los Angeles, CA 90089, USA
| | - Pranav M Patel
- School of Medicine, University of California, Irvine, 101 The City Drive South, Orange, CA, 92868, USA
| | - Zhongping Chen
- Beckman Laser Institute, University of California, Irvine, 1002 Health Sciences Rd. Irvine, CA 92617, USA.,Department of Biomedical Engineering, University of California, Irvine, Irvine, CA, 92697-2700, USA
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20
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Zeng L, Piao Z, Huang S, Jia W, Chen Z. Label-free optical-resolution photoacoustic microscopy of superficial microvasculature using a compact visible laser diode excitation. Opt Express 2015; 23:31026-33. [PMID: 26698732 PMCID: PMC4692256 DOI: 10.1364/oe.23.031026] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 11/12/2015] [Accepted: 11/12/2015] [Indexed: 05/20/2023]
Abstract
We have developed laser-diode-based optical-resolution photoacoustic microscopy (LD-OR-PAM) of superficial microvasculature which has the desirable properties of being compact, low-cost, and label-free. A 300-mW visible pulsed laser diode was operated at a 405 ± 5 nm wavelength with a pulse energy as low as 52 nJ. By using a 3.6 MHz ultrasound transducer, the system was tested on carbon fibers with a lateral resolution of 0.95 µm and an SNR of 38 dB. The subcutaneous microvasculature on a mouse back was imaged without an exogenous contrast agent which demonstrates the potential of the proposed prototype for skin chromophores. Our eventual goal is to offer a practical and affordable multi-wavelength functional LD-OR-PAM instrument suitable for clinical applications.
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Affiliation(s)
- Lvming Zeng
- Key Lab of Optic-Electronic and Communication, Jiangxi Sciences and Technology Normal University, Nanchang 330038, China
- Beckman Laser Institute, University of California, Irvine, Irvine, California 92612, USA
- These authors contributed equally to this work
| | - Zhonglie Piao
- Beckman Laser Institute, University of California, Irvine, Irvine, California 92612, USA
- These authors contributed equally to this work
| | - Shenghai Huang
- Beckman Laser Institute, University of California, Irvine, Irvine, California 92612, USA
| | - Wangcun Jia
- Beckman Laser Institute, University of California, Irvine, Irvine, California 92612, USA
| | - Zhongping Chen
- Beckman Laser Institute, University of California, Irvine, Irvine, California 92612, USA
- Department of Biomedical Engineering, University of California, Irvine, Irvine, California 92697, USA
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21
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Piao Z, Ma T, Li J, Wiedmann MT, Huang S, Yu M, Kirk Shung K, Zhou Q, Kim CS, Chen Z. High speed intravascular photoacoustic imaging with fast optical parametric oscillator laser at 1.7 μm. Appl Phys Lett 2015; 107:083701. [PMID: 26339072 PMCID: PMC4552696 DOI: 10.1063/1.4929584] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 08/14/2015] [Indexed: 05/19/2023]
Abstract
Intravascular photoacoustic imaging at 1.7 μm spectral band has shown promising capabilities for lipid-rich vulnerable atherosclerotic plaque detection. In this work, we report a high speed catheter-based integrated intravascular photoacoustic/intravascular ultrasound (IVPA/IVUS) imaging system with a 500 Hz optical parametric oscillator laser at 1725 nm. A lipid-mimicking phantom and atherosclerotic rabbit abdominal aorta were imaged at 1 frame per second, which is two orders of magnitude faster than previously reported in IVPA imaging with the same wavelength. Clear photoacoustic signals by the absorption of lipid rich deposition demonstrated the ability of the system for high speed vulnerable atherosclerotic plaques detection.
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Affiliation(s)
| | - Teng Ma
- Department of Biomedical Engineering, NIH Ultrasonic Transducer Resource Center, University of Southern California , Los Angeles, California 90089, USA
| | - Jiawen Li
- Beckman Laser Institute, Department of Biomedical Engineering, University of California , Irvine, Irvine, California 92612, USA
| | - Maximilian T Wiedmann
- Beckman Laser Institute, Department of Biomedical Engineering, University of California , Irvine, Irvine, California 92612, USA
| | - Shenghai Huang
- Beckman Laser Institute, Department of Biomedical Engineering, University of California , Irvine, Irvine, California 92612, USA
| | - Mingyue Yu
- Department of Biomedical Engineering, NIH Ultrasonic Transducer Resource Center, University of Southern California , Los Angeles, California 90089, USA
| | - K Kirk Shung
- Department of Biomedical Engineering, NIH Ultrasonic Transducer Resource Center, University of Southern California , Los Angeles, California 90089, USA
| | - Qifa Zhou
- Department of Biomedical Engineering, NIH Ultrasonic Transducer Resource Center, University of Southern California , Los Angeles, California 90089, USA
| | - Chang-Seok Kim
- Department of Cogno-Mechatronics Engineering, Pusan National University , Busan 609-735, South Korea
| | - Zhongping Chen
- Beckman Laser Institute, Department of Biomedical Engineering, University of California , Irvine, Irvine, California 92612, USA
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22
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Huang S, Piao Z, Zhu J, Lu F, Chen Z. In vivo microvascular network imaging of the human retina combined with an automatic three-dimensional segmentation method. J Biomed Opt 2015; 20:76003. [PMID: 26169790 PMCID: PMC4572094 DOI: 10.1117/1.jbo.20.7.076003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 06/12/2015] [Indexed: 05/21/2023]
Abstract
Microvascular network of the retina plays an important role in diagnosis and monitoring of various retinal diseases. We propose a three-dimensional (3-D) segmentation method with intensity-based Doppler variance (IBDV) based on swept-source optical coherence tomography. The automatic 3-D segmentation method is used to obtain seven surfaces of intraretinal layers. The microvascular network of the retina, which is acquired by the IBDV method, can be divided into six layers. The microvascular network of the six individual layers is visualized, and the morphology and contrast images can be improved by using the segmentation method. This method has potential for earlier diagnosis and precise monitoring in retinal vascular diseases.
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Affiliation(s)
- Shenghai Huang
- Wenzhou Medical University, School of Optometry and Ophthalmology, 270 Xueyuan Road, Wenzhou 325027, China
- University of California, Irvine, Beckman Laser Institute, 1002 Health Sciences Road East, Irvine, California 92612, United States
| | - Zhonglie Piao
- University of California, Irvine, Beckman Laser Institute, 1002 Health Sciences Road East, Irvine, California 92612, United States
| | - Jiang Zhu
- University of California, Irvine, Beckman Laser Institute, 1002 Health Sciences Road East, Irvine, California 92612, United States
| | - Fan Lu
- Wenzhou Medical University, School of Optometry and Ophthalmology, 270 Xueyuan Road, Wenzhou 325027, China
| | - Zhongping Chen
- Wenzhou Medical University, School of Optometry and Ophthalmology, 270 Xueyuan Road, Wenzhou 325027, China
- University of California, Irvine, Beckman Laser Institute, 1002 Health Sciences Road East, Irvine, California 92612, United States
- University of California, Irvine, Department of Biomedical Engineering, Irvine, California 92697, United States
- Address all correspondence to: Zhongping Chen, E-mail:
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23
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Lee SH, Kil TJ, Park KR, Kim BC, Kim JG, Piao Z, Corre P. Three-dimensional architectural and structural analysis--a transition in concept and design from Delaire's cephalometric analysis. Int J Oral Maxillofac Surg 2014; 43:1154-60. [PMID: 24794759 DOI: 10.1016/j.ijom.2014.03.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Revised: 02/10/2014] [Accepted: 03/27/2014] [Indexed: 11/19/2022]
Abstract
The aim of this study was to present a systematic sequence for three-dimensional (3D) measurement and cephalometry, provide the norm data for computed tomography-based 3D architectural and structural cephalometric analysis, and validate the 3D data through comparison with Delaire's two-dimensional (2D) lateral cephalometric data for the same Korean adults. 2D and 3D cephalometric analyses were performed for 27 healthy subjects and the measurements of both analyses were then individually and comparatively analyzed. Essential diagnostic tools for 3D cephalometry with modified definitions of the points, planes, and measurements were set up based on a review of the conceptual differences between two and three dimensions. Some 2D and 3D analysis results were similar, though significant differences were found with regard to craniofacial angle (C1-F1), incisal axis angles, cranial base length (C2), and cranial height (C3). The discrepancy in C2 and C3 appeared to be directly related to the magnification of 2D cephalometric images. Considering measurement discrepancies between 2D and 3D Delaire's analyses due to differences in concept and design, 3D architectural and structural analysis needs to be conducted based on norms and a sound 3D basis for the sake of its accurate application and widespread adoption.
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Affiliation(s)
- S-H Lee
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University, Seoul, Republic of Korea.
| | - T-J Kil
- Department of Oral and Maxillofacial Surgery, Armed Forces Capital Hospital, ROK Army, Republic of Korea
| | - K-R Park
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - B C Kim
- Department of Oral and Maxillofacial Surgery, Daejeon Dental Hospital, College of Dentistry, Wonkwang University, Daejeon, Republic of Korea
| | - J-G Kim
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - Z Piao
- Department of Oral Maxillofacial Surgery, Stomatological Hospital of Guangzhou Medical College, Guangzhou, China
| | - P Corre
- Department of Maxillofacial Surgery and Stomatology, University Hospital, Nantes, France
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24
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Abstract
We present an ultrathin fiber-optic endoscopy probe for optical coherence tomography (OCT), which is made of a series of fused optical fibers instead of the conventional scheme based on an objective lens. The large-core fiber with a core diameter of 20 μm was utilized for the probe, while a single-mode fiber of core diameter 8.2 μm mainly delivered the OCT light. Those fibers were spliced with a bridge fiber of an intermediate core size. The guided light was stepwise converted to a beam of a large mode-field diameter to be radiated with a larger depth of focus. We obtained a 125 μm thick all-fiber endoscopy probe with a side-viewing capability implemented by an angled fiber end. Successful OCT imaging was demonstrated with a swept-source OCT system and showed the practical applicability of our lens-free endoscopy probe.
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Affiliation(s)
- Sucbei Moon
- Department of Physics, Kookmin University, Seoul, South Korea.
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25
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Kang YH, Kim BC, Park KR, Yon JY, Kim HJ, Tak HJ, Piao Z, Kim MK, Lee SH. Visual pathway-related horizontal reference plane for three-dimensional craniofacial analysis. Orthod Craniofac Res 2012; 15:245-54. [PMID: 23020695 DOI: 10.1111/j.1601-6343.2012.01551.x] [Citation(s) in RCA: 5] [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] [Indexed: 11/29/2022]
Abstract
OBJECTIVES To construct three-dimensional (3D) horizontal reference planes based on visual pathway and to determine their stability and reliability by analyzing the structural patterns of normal and dysmorphology for 3D craniofacial analysis. SETTING AND SAMPLE POPULATION Thirty-six subjects with maxillofacial dysmorphology and malocclusion, and eight normal controls. MATERIALS AND METHODS POPULATION: On the 3D computed tomographic images of the subjects, the visual pathway-based planes, including the orbital axis plane (OAP), visual axis plane (VAP), and the optical axis plane (OpAP), were constructed and evaluated. RESULTS The OAP, but not the VAP and OpAP, showed the ideal relationship between the midsagittal and posterior maxillary plane, and properly described the different patterns of maxillofacial dysmorphology with craniofacial plane 1 of Delaire's analysis and the occlusal plane. CONCLUSIONS The proposed visual pathway-related horizontal reference planes, and in particular the OAP, seem to correctly express the visual axis and the position of the head in natural head position and can be used as a horizontal reference plane for the 3D analysis of craniofacial dysmorphology and anthropology.
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Affiliation(s)
- Y H Kang
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University, Seoul, Korea
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26
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Atabaev TS, Piao Z, Kim HK, Hwang YH, Kim B. Enhanced stokes and anti-stokes photoluminescence emission from LaAlO3:Nd+3 nanosized powder coated with a SiO2 shell layer. J Nanosci Nanotechnol 2011; 11:5892-5897. [PMID: 22121627 DOI: 10.1166/jnn.2011.4343] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The research on and development of materials in the field of rare-earth-ion doped nanocrystals for downconversion and up-conversion emission has been recognized to hold tremendous potential in the areas of photonic and biophotonic applications. In the present manuscript, the comprehensive results of the investigation of Stokes and anti-Stokes photoluminescence emission from the prepared LaAlO3:Nd+3 nanoparticles synthesized via the Pechini-type sol-gel method are presented and explained. The XRD diffraction peaks of the LaAlO3:Nd+3 nanoparticles can be easily assigned to the cubic-perovskite LaAlO3 structure. The FESEM image confirms the formation of approximately spherical particles within the range of 80 +/- 30 nm. The PL results showed that the LaAlO3 doped with 5% of Nd+3 ions shows the strongest emission. The core-shell structures obviously enhanced the photoluminescence intensity by suppressing the non-radiative emission and surface defects. As they yield the best PL measurement results, the LaAlO3:0.05Nd+3 nanoparticles were coated with a SiO2 shell layer, to enhance the photoluminescence emission. The mechanisms that are responsible for the photoluminescence emission process observed in the samples are discussed herein, with the help of the Nd+3 ion Dieke energy level diagram. Power dependence slope measurements were performed to identify the processes involved in the LaAlO3:Nd+3 up-conversion photoluminescence.
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Affiliation(s)
- Timur S Atabaev
- Department of Nanomaterials Engineering and BK 21 Nano Fusion Technology Division, Pusan National University, Miryang, 627-706, Republic of Korea
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Qiu J, Li X, Wu Y, He W, Park SJ, Piao Z, Kim HK, Hwang YH, Zhao J, Wang Y, Sun X. Optical and electrical properties of ultralong ZnO nanorod fabricated from preheating hydrothermal method. J Nanosci Nanotechnol 2011; 11:463-469. [PMID: 21446477 DOI: 10.1166/jnn.2011.3203] [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: 05/30/2023]
Abstract
Ultralong ZnO nanorod arrays with a length of 10 microm were synthesized using a preheated hydrothermal-solution precursor, and their optical and electrical properties were studied using photoluminescence (PL) spectra and field effect transistors (FETs). The PL spectra showed ultraviolet, orange, and red emissions and had different temperature dependences with increasing temperature. The high-resolution photoluminescence spectra showed that the ultraviolet (UV) emission had different origins within different temperature ranges. The parameters describing the temperature dependence of the peak position shift, intensity, and full width at half maximum were evaluated using different models. After the fabrication of individual nanorod FETs, the ultralong ZnO NRs showed a clear n-type gate modulation with a typical electron concentration of 10(17) cm(-3) and a typical electron mobility of 35.7 cm2/V x s.
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Affiliation(s)
- Jijun Qiu
- RCDAMP, Pusan National University, Busan 609-735, Korea
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Piao Z, Qiu J, Wu Y, Park SJ, He W, Timur A, Ryu SC, Kim HK, Hwang YH. Effects of the nano-tubular anodic TiO2 buffer layer on bioactive hydroxyapatite coating. J Nanosci Nanotechnol 2011; 11:286-290. [PMID: 21446441 DOI: 10.1166/jnn.2011.3270] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We studied the effect of nano-tubular anodic TiO2 buffer layers on hydroxyapatite (HA) coating. The pulsed laser deposition (PLD) method was used to deposit HA on a well arranged nano-tubular anodic TiO2 (NT-ATO) buffer layer prepared by an electrochemical anodization technique. The surface morphology and chemical composition of HA coatings were characterized by using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), and contact angle measurement. We found that crystalline HA coatings show well arranged porous morphologies with a favorable surface wettability. We also found that an anodic nano-tubular TiO2 buffer layer with a relatively short tube length shows a better coating morphology. The deposition process of HA on the nanotubular TiO2 buffer layer was also proposed.
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Affiliation(s)
- Zhonglie Piao
- Department of Nano Materials Engineering and BK 21 Nano Fusion Technology Division, Pusan National University, Miryang 627-706, Korea
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Kang YJ, Cheng J, Mei LJ, Hu J, Piao Z, Yin SX. Multiple copies of 16S rRNA gene affect the restriction patterns and DGGE profile revealed by analysis of genome database. Microbiology (Reading) 2010. [DOI: 10.1134/s0026261710050103] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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30
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Kang YJ, Cheng J, Mei LJ, Hu J, Piao Z, Yin SX. Multiple copies of 16s rRNA gene affect the restriction patterns and DGGE profile as revealed by analysis of genome database. Mikrobiologiia 2010; 79:664-671. [PMID: 21090508] [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: 05/30/2023]
Abstract
The use of 16S rRNA gene has been a "golden" method to determine the diversity of microbial communities in environmental samples, phylogenetic relationships of prokaryotes and taxonomic position of newly isolated organisms. However due to the presence of multiple heterogeneous 16S rRNA gene copies in many strains, the interpretation of microbial ecology via 16S rRNA sequences is complicated. Purpose of present paper is to demonstrate the extent to which the multiple heterogeneous 16S rRNA gene copies affect RFLP patterns and DGG E profiles by using the genome database. In present genome database, there are 782 bacterial strains in total whose genomes have been completely sequenced and annotated. Among the total strains, 639 strains (82%) possess multiple 16S rRNA gene copies, 415 strains (53%) whose multiple copies are heterogeneous in sequences as revealed by alignment, 236 strains (30%) whose multiple copies show different restrict patterns by CSP61 + Hinfl, MspI + Rsal or HhaI as analyzed in silico. Polymorphisms of the multiple copies in certain strains were further characterized by G + C% and phylogentic distances based on the sequences of V3 region, which are linked to DGGE patters. Polymorphisms of a few strains were shown as examples. Using artificial communities, it is demonstrated that the presence of multiple heterogeneous 16S rRNA gene copies potentially leads to over-estimation of the diversity of a community. It is suggested that care must be taken when interpreting 16S rRNA-based RFLP and DGGE data and profiling an environmental community.
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Affiliation(s)
- Y J Kang
- Agricultural College, Yangzhou University, Yangzhou, China
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31
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Mani J, Diehl B, Piao Z, Schuele SS, LaPresto E, Liu P, Nair DR, Dinner DS, Luders HO. Evidence for a basal temporal visual language center: Cortical stimulation producing pure alexia. Neurology 2008; 71:1621-7. [DOI: 10.1212/01.wnl.0000334755.32850.f0] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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32
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Piao GH, Piao WH, He Y, Zhang HH, Wang GQ, Piao Z. Hyper-methylation of RIZ1 tumor suppressor gene is involved in the early tumorigenesis of hepatocellular carcinoma. Histol Histopathol 2008; 23:1171-5. [PMID: 18712668 DOI: 10.14670/hh-23.1171] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The retinoblastoma protein-interacting zinc finger gene RIZ1 is a putative tumor suppressor gene, and the inactivation of the RIZ1 is frequently found in tumors through a loss of mRNA expression. In order to understand the role of RIZ1 inactivation in the tumorigenesis of hepatocellular carcinoma (HCC), we detected the RIZ1 promoter methylation status in 39 HCCs using a methylation specific PCR (MSP) method, and carried out LOH study with marker P704. We also assessed the associations between the methylation status and clinicopathological parameters, tumor size, tumor differentiation, and fractional allelic loss (FAL). The results showed that the RIZ1 promoter methylated both in advanced tumors (>3 cm), (18/31, 58.0%) and in early tumors (<3 cm), (4/8, 50.0%). There were 54.6% (12/22) tumors with hyper-methylation in the low FAL group and 45.5% (10/22) in the high FAL group. Moreover, the DNA methylation of the RIZ1 promoter was found not only in the poorly differentiated tumors (12/22, 54.6%), but also in the well differentiated tumors (10/22, 45.5%). Among the 22 HCCs (22/39, 56.4%) that showed hyper-methylation at the RIZ1 promoter region, 3 cases showed biallelic methylation. Interestingly, one case showed hyper-methylation on one allele and a loss of heterozygosity (LOH) on the other allele. In other words, 4 HCCs showed the biallelic inactivation of the RIZ1. These results suggest that the inactivation of the RIZ1 by DNA methylation at its promoter region is involved in the tumorigenesis of HCC, particularly in the early stage of disease.
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Affiliation(s)
- G H Piao
- Department of Clinical Pathology, Yanbian Social Mental Hospital, Yanji City, China
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33
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Piao Z, Kang S, Lee S, Kim N, Tak H, Park T, Suh K, Kim J, Kim CW, Lee SH. Role of epithelium during the fusion of facial process in avian cleft lip and palate model. Int J Oral Maxillofac Surg 2005. [DOI: 10.1016/s0901-5027(05)81263-9] [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]
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34
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Du Y, Carling T, Fang W, Piao Z, Sheu JC, Huang S. Hypermethylation in human cancers of the RIZ1 tumor suppressor gene, a member of a histone/protein methyltransferase superfamily. Cancer Res 2001; 61:8094-9. [PMID: 11719434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
The retinoblastoma protein-interacting zinc finger gene RIZ1 is a tumor suppressor gene and a member of a nuclear histone/protein methyltransferase superfamily. RIZ1 inactivation is commonly found in many types of human cancers and occurs through loss of mRNA expression, frameshift mutation, chromosomal deletion, and missense mutation. RIZ1 is also a tumor susceptibility gene in mice. We now show that loss of RIZ1 mRNA in human cancers is associated with DNA methylation of its promoter CpG island. Methylation of the RIZ1 promoter strongly correlated with lost or decreased RIZ1 mRNA expression in breast, liver, colon, and lung cancer cell lines as well as in liver cancer tissues. Treatment with the methylation inhibitor 5-aza-2'-deoxycytidine activated RIZ1 mRNA expression in cancer cells. Furthermore, methylation was found in 11 of 25 (44%) breast cancer specimens and 20 of 32 (62%) liver cancer specimens. Our results suggest that DNA methylation is a common mechanism in inactivating the RIZ1 tumor suppressor gene in human liver and breast cancers.
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Affiliation(s)
- Y Du
- The Burnham Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA
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35
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Piao Z, Ui-Tei K, Nagano M, Miyata Y. Participation of intracellular Ca(2+)/calmodulin and protein kinase(s) in the pathway of apoptosis induced by a Drosophila cell death gene, reaper. Mol Cell Biol Res Commun 2001; 4:307-12. [PMID: 11529681 DOI: 10.1006/mcbr.2001.0297] [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] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
To elucidate the apoptotic signaling pathway, we have generated a cell culture model: S2 cells stably transfected with a Drosophila cell death gene, reaper (rpr). Following rpr overexpression, caspase activation-mediated apoptotic cell death was induced in the cells. Apoptosis triggered by rpr required intracellular Ca(2+) ions and calmodulin. Furthermore, protein kinase inhibitors H-7 (a PKC, PKA, PKG, MLCK, and CKI inhibitor), calphostin C (a PKC inhibitor), or H-89 (a PKA and PKG inhibitor) completely blocked apoptosis induced by rpr, suggesting that some kind of serine/threonine protein kinase(s) act upstream of caspase in apoptotic pathway induced by rpr in S2 cells.
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Affiliation(s)
- Z Piao
- Department of Pharmacology, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, 113-8602, Japan
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36
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Abstract
The RIZ (PRDM2) locus commonly undergoes loss of heterozygosity (LOH) and maps within the minimal deleted region on 1p36 in hepatocellular carcinoma (HCC). Although peptide-altering mutations of RIZ are rare in HCC, the RIZ1 product is commonly lost in HCC and has tumour suppressive activities. Here, we analysed RIZ gene mutations and LOH in HCC, breast cancer, familial melanoma, colon cancer, and stomach cancer. We found 7 polymorphisms but no mutations. By analysing the Pro704-deletion polymorphism, we detected LOH of RIZ in 31 of 79 (39%) informative HCC cases, 11 of 47 (23%) colon cancer cases, 8 of 43 (19%) breast cancer cases, 8 of 66 (12%) stomach cancer cases. Importantly, loss of the Pro704(+)allele was found in 74% of the 31 LOH positive HCC cases (P< 0.01), indicating a preferential loss and hence a stronger tumour suppressor role for this allele compared to the P704(-)allele. In addition, the Pro704(+)allele was found to be more common in Asians (0.61) than Caucasians (0.42) (P = 0.0000), suggesting an interesting link between gene polymorphisms and potential differences in tumour incidence between racial groups.
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Affiliation(s)
- W Fang
- Program in Oncogenes and Tumor Suppressor Genes, The Burnham Institute, La Jolla, CA 92037, USA
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Piao Z, Lee KS, Kim H, Perucho M, Malkhosyan S. Identification of novel deletion regions on chromosome arms 2q and 6p in breast carcinomas by amplotype analysis. Genes Chromosomes Cancer 2001; 30:113-22. [PMID: 11135428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023] Open
Abstract
DNA fingerprinting by arbitrarily primed PCR (AP-PCR) was employed to identify molecular genetic alterations in 37 primary breast carcinomas. AP-PCR is a PCR-based technique that uses only one primer of arbitrary sequence that generates a molecular karyotype (amplotype) of tumors. The breast cancer amplotype generated with two arbitrary primers (MCG1 and Blue) showed a relatively high frequency (more than 20% of the tumors) of gains at chromosomes 1, 4, and 8, and of losses at chromosomes 2, 4, 6, 9, 10, 11, 13, and the X chromosome. We further analyzed the regions most commonly gained at chromosome 8 (47%) and lost at chromosomes 2 (38%) and 6 (49%) by determining the subchromosomal localization of the fingerprint bands from these chromosomes. The region of gain at chromosome 8 was mapped at 8q24.1, close to MYC. Band MCG1-A1 was assigned to chromosome band 2q22, and band Blue-J was assigned to 6p21. Common losses of these chromosomal regions have not been described for breast cancer. To map these deletion regions more precisely, we performed loss of heterozygosity (LOH) analysis by microallelotyping on 20 of the 37 cancers previously analyzed by AP-PCR and another additional 52 breast carcinomas. The results suggest that the regions at 2q21-24 and 6p21-23 may harbor novel tumor suppressor genes for breast cancer. LOH at 2q21-24 (D2S2304) was more frequent in high-grade tumors (59%) than in low-grade tumors (29%) (P = 0.03). This suggests that this genetic alteration may be associated with tumor progression and shows the power of the amplotype approach in detecting novel genetic alterations that are useful as clinical parameters of breast cancer.
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Affiliation(s)
- Z Piao
- The Burnham Institute, Oncogene and Tumor Suppressor Gene Program, La Jolla, California 92037, USA
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Nagano M, Ui-Tei K, Suzuki H, Piao Z, Miyata Y. CDK inhibitors suppress apoptosis induced by chemicals and by excessive expression of a cell death gene, reaper, in Drosophila cells. Apoptosis 2000; 5:543-50. [PMID: 11303913 DOI: 10.1023/a:1009641613826] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The present study was aimed to investigate whether or not cyclin-dependent kinases (CDKs) participate in different cascades leading to apoptosis. We examined the effects of two CDK inhibitors, olomoucine (OLM) and butyrolactone-I (BL-I), on apoptosis induced in two kinds of Drosophila cell lines. Increases of caspase activity induced by actinomycin D, cycloheximide, H-7 or A23187 in a Drosophila neuronal cell line, ML-DmBG2-c2, and induced by excessive expression of a Drosophila cell death gene, reaper, in Drosophila S2 cells were suppressed by 24-h pretreatment of each CDK inhibitor. Concomitant with the suppression of the caspase activity, fragmentations of cells and DNA, representatives of apoptosis, were also inhibited. These results suggest that CDK(s) participates in progression of apoptosis. However, these effects of the CDK inhibitors were also observed even at lower doses which did not affect cell proliferation. Therefore, it was shown that apoptosis is not always related to cell cycle in Drosophila cells. It was also suggested that the target(s) of the CDK inhibitors locates upstream of caspase in the cascade(s) of apoptosis.
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Affiliation(s)
- M Nagano
- Department of Pharmacology, Nippon Medical School, Tokyo, Japan
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39
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Fang W, Piao Z, Simon D, Sheu JC, Huang S. Mapping of a minimal deleted region in human hepatocellular carcinoma to 1p36.13-p36.23 and mutational analysis of the RIZ (PRDM2) gene localized to the region. Genes Chromosomes Cancer 2000. [PMID: 10862032 DOI: 10.1002/1098-2264(200007)28:3%3c269::aid-gcc4%3e3.0.co;2-k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Human chromosome band 1p36 commonly undergoes loss of heterozygosity (LOH) in hepatocellular carcinoma (HCC) but the minimal deleted region remains to be mapped. This chromosomal region contains a candidate HCC suppressor gene, RIZ (PRDM2), that is a member of the PR (PRDI-BF1-RIZ homology)-domain-containing zinc finger gene family. One characteristic of this family is the unusual yin-yang involvement in human cancers. The PR-domain-containing RIZ1 product of the RIZ locus, in contrast to the PR-domain-minus product RIZ2, is commonly lost or underexpressed in HCC. Furthermore, RIZ1 can induce cell cycle arrest, apoptosis, or both and suppress HCC tumorigenicity in nude mice. To help identify the putative HCC locus on 1p36 and to evaluate a genetic role of RIZ in HCC, we studied 97 HCC cases and mapped a minimal deleted region in HCC to 1p36.13-p36. 23 between markers D1S434 and D1S436. Notably, RIZ mapped within this region and was found to undergo LOH in 37% (25/67) of HCC cases. Single-strand conformation polymorphism (SSCP) analysis, however, did not show mutations in the PR-domain region of RIZ1 in 49 cases of HCC examined. Our data suggest that the RIZ locus is a target of frequent deletion in HCC, but that the more common way of RIZ inactivation in HCC may not involve mutations that alter peptide sequences. Genes Chromosomes Cancer 28:269-275, 2000.
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Affiliation(s)
- W Fang
- Program in Oncogenes and Tumor Suppressor Genes, The Burnham Institute, La Jolla, California
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40
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Fang W, Piao Z, Simon D, Sheu JC, Huang S. Mapping of a minimal deleted region in human hepatocellular carcinoma to 1p36.13-p36.23 and mutational analysis of the RIZ (PRDM2) gene localized to the region. Genes Chromosomes Cancer 2000. [PMID: 10862032 DOI: 10.1002/1098-2264(200007)28:3<269::aid-gcc4>3.0.co;2-k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Human chromosome band 1p36 commonly undergoes loss of heterozygosity (LOH) in hepatocellular carcinoma (HCC) but the minimal deleted region remains to be mapped. This chromosomal region contains a candidate HCC suppressor gene, RIZ (PRDM2), that is a member of the PR (PRDI-BF1-RIZ homology)-domain-containing zinc finger gene family. One characteristic of this family is the unusual yin-yang involvement in human cancers. The PR-domain-containing RIZ1 product of the RIZ locus, in contrast to the PR-domain-minus product RIZ2, is commonly lost or underexpressed in HCC. Furthermore, RIZ1 can induce cell cycle arrest, apoptosis, or both and suppress HCC tumorigenicity in nude mice. To help identify the putative HCC locus on 1p36 and to evaluate a genetic role of RIZ in HCC, we studied 97 HCC cases and mapped a minimal deleted region in HCC to 1p36.13-p36. 23 between markers D1S434 and D1S436. Notably, RIZ mapped within this region and was found to undergo LOH in 37% (25/67) of HCC cases. Single-strand conformation polymorphism (SSCP) analysis, however, did not show mutations in the PR-domain region of RIZ1 in 49 cases of HCC examined. Our data suggest that the RIZ locus is a target of frequent deletion in HCC, but that the more common way of RIZ inactivation in HCC may not involve mutations that alter peptide sequences. Genes Chromosomes Cancer 28:269-275, 2000.
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Affiliation(s)
- W Fang
- Program in Oncogenes and Tumor Suppressor Genes, The Burnham Institute, La Jolla, California
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Abstract
Microsatellite instability (MSI) phenotype, caused by a deficiency of DNA mismatch repair genes, has been detected in a subset of tumors in the gastrointestinal tract. However, it is not clear how MSI is involved in the tumorigenesis of hepatocellular carcinomas (HCC). Results with HCC are controversial, with positive results published with American and European tumors, but negative with Japanese tumors. We report the absence of MSI in 39 Korean HCCs after analysis with 6 mononucleotide- and over 150 dinucleotide-repeat markers. Only one such dinucleotide-repeat (D2S213) exhibited a reproducible shift in mobility, representing a somatic mutation present in only some of the tumor cells. This may be the result of a spontaneous error of replication due to the intrinsic mutability of these unstable sequences and without any connection to true genomic instability. In support of this interpretation, no frameshift mutations were found at the coding repeats of target genes for the microsatellite mutator phenotype including TGF-betaRII, BAX, hMSH3, and hMSH6. In contrast, we observed frequent allelic losses on chromosomes 4q, 8p, 16q, and 17p by the analysis of dinucleotide repeats (microallelotyping), reflecting a high degree of tumor chromosomal instability, which was significantly associated to the tumor differentiation (p=0.036, Fisher's exact test). These results suggest that, unlike chromosomal instability, widespread MSI plays no role in the development or progression of HCC.
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Affiliation(s)
- Z Piao
- The Burnham Institute, La Jolla, CA 92037, USA.
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Piao Z, Fang W, Malkhosyan S, Kim H, Horii A, Perucho M, Huang S. Frequent frameshift mutations of RIZ in sporadic gastrointestinal and endometrial carcinomas with microsatellite instability. Cancer Res 2000; 60:4701-4. [PMID: 10987271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
Many lines of evidence suggest that the retinoblastoma protein interacting zinc finger gene RIZ is a strong candidate for the tumor suppressor locus on 1p36, a region commonly deleted in many human cancers with chromosomal instability. In addition, a role for RIZ in tumors of the microsatellite instability pathway is suggested by frequent frameshift mutations in hereditary non-polyposis colorectal carcinomas. Here we studied RIZ mutations in sporadic cancers with microsatellite instability. Frameshift mutations in the two coding polyadenosine tracks of RIZ were found in 19 (48%) of 40 gastric carcinomas, 6 (33%) of 18 endometrial carcinomas, 14 (26%) of 51 of colorectal carcinomas, and 7 (54%) of 13 cell lines. Eleven tumor tissues showed biallelic inactivation of RIZ. In contrast, no frameshift mutations were found in 70 microsatellite stable tumors. These results suggest an important role for RIZ in sporadic cancers with microsatellite instability.
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Affiliation(s)
- Z Piao
- The Burnham Institute, La Jolla, California 92037, USA
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Abstract
BACKGROUND The p16(INK4A) gene encodes 2 cell cycle regulator proteins, p16 and p14(ARF), by alternative splicing. This genetic locus also contains another cell cycle regulator gene, p15(INK4B), which encodes p15. The inactivation of the p16 protein has been demonstrated in some hepatocellular carcinomas (HCCs); however, the inactivation of the other 2 cell regulator proteins and their inactivation patterns are not well characterized. METHODS To characterize the role of the above 3 cell cycle regulator proteins in HCCs, the authors examined the genomic status of the p16(INK4A) and p15(INK4B) genes and their RNA products in 20 HCC tissues and 7 human HCC cell lines. Homozygous deletions in each exon of p16(INK4A) and p15(INK4B) were evaluated by comparative multiplex polymerase chain reaction (PCR), and the methylation status of the p16(INK4A) and p15(INK4B) promoter region was analyzed by methylation specific PCR. RESULTS Homozygous deletions were found in 6 of 20 HCCs (30%) and 2 of 7 HCC cell lines (29%). In 20 HCCs, the frequency of homozygous deletions was 20% in exon 1 of p15(INK4B), 20% in exon 2 of p15(INK4B), 10% in exon 1beta of p16(INK4A), 25% in exon 1alpha of p16(INK4A), 15% in exon 2 of p16(INK4A), and 15% in exon 3 of p16(INK4A). The authors found hypermethylation of the p16(INK4A) promoter region in 7 HCCs (35%) and 3 HCC cell lines (43%). The overall frequency of p16 alterations in HCCs, including hypermethylation and homozygous deletions, was 60% (12 of 20 cases). According to reverse transcriptase-PCR analysis, the absence of RNA expression was most frequent in p16 (11 of 20 cases, 55%) and less frequent in p15 (7 of 20 cases, 35%) and p14(ARF) (5 of 20 cases, 25%). CONCLUSIONS Among the 3 cell cycle regulator proteins encoded at the 9p21 genetic locus, inactivation of p16 is the most frequent event in HCCs in which promoter hypermethylation and homozygous deletions are the common mechanisms.
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Affiliation(s)
- M Jin
- Department of Pathology, Brain Korea 21 Projects for Medical Sciences, Yonsei University, College of Medicine, Seoul, Korea
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Malkhosyan SR, Yamamoto H, Piao Z, Perucho M. Late onset and high incidence of colon cancer of the mutator phenotype with hypermethylated hMLH1 gene in women. Gastroenterology 2000; 119:598. [PMID: 10960275 DOI: 10.1053/gast.2000.16154] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
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45
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Abstract
BACKGROUND The p16(INK4A) gene encodes 2 cell cycle regulator proteins, p16 and p14(ARF), by alternative splicing. This genetic locus also contains another cell cycle regulator gene, p15(INK4B), which encodes p15. The inactivation of the p16 protein has been demonstrated in some hepatocellular carcinomas (HCCs); however, the inactivation of the other 2 cell regulator proteins and their inactivation patterns are not well characterized. METHODS To characterize the role of the above 3 cell cycle regulator proteins in HCCs, the authors examined the genomic status of the p16(INK4A) and p15(INK4B) genes and their RNA products in 20 HCC tissues and 7 human HCC cell lines. Homozygous deletions in each exon of p16(INK4A) and p15(INK4B) were evaluated by comparative multiplex polymerase chain reaction (PCR), and the methylation status of the p16(INK4A) and p15(INK4B) promoter region was analyzed by methylation specific PCR. RESULTS Homozygous deletions were found in 6 of 20 HCCs (30%) and 2 of 7 HCC cell lines (29%). In 20 HCCs, the frequency of homozygous deletions was 20% in exon 1 of p15(INK4B), 20% in exon 2 of p15(INK4B), 10% in exon 1beta of p16(INK4A), 25% in exon 1alpha of p16(INK4A), 15% in exon 2 of p16(INK4A), and 15% in exon 3 of p16(INK4A). The authors found hypermethylation of the p16(INK4A) promoter region in 7 HCCs (35%) and 3 HCC cell lines (43%). The overall frequency of p16 alterations in HCCs, including hypermethylation and homozygous deletions, was 60% (12 of 20 cases). According to reverse transcriptase-PCR analysis, the absence of RNA expression was most frequent in p16 (11 of 20 cases, 55%) and less frequent in p15 (7 of 20 cases, 35%) and p14(ARF) (5 of 20 cases, 25%). CONCLUSIONS Among the 3 cell cycle regulator proteins encoded at the 9p21 genetic locus, inactivation of p16 is the most frequent event in HCCs in which promoter hypermethylation and homozygous deletions are the common mechanisms.
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Affiliation(s)
- M Jin
- Department of Pathology, Brain Korea 21 Projects for Medical Sciences, Yonsei University, College of Medicine, Seoul, Korea
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Abstract
Hepatocellular carcinoma (HCC) frequently shows an allelic imbalance (AI) on chromosome 16q. In order to define the commonly affected regions on chromosome 16q, we assessed AI studies in 41 HCCs using a panel of 37 microsatellite markers. Thirty-five cases (85%) showed AI at one or more loci. Among the 35 cases with AI, 21 cases showed multiple AI, suggesting the wide scope of deletion on the long arm of chromosome 16, and the remaining 14 cases showed partial AI. Detailed deletion mapping identified two independent commonly deleted regions on this chromosome arm. These included the D16S3106 locus and D16S498 locus. In conclusion, we have demonstrated frequent AI on 16q in HCCs and identified two loci with frequent AI, which may harbour new tumour suppressor genes.
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Affiliation(s)
- Z Piao
- Department of Pathology, Yonsei University, College of Medicine, Seoul, Korea
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Abstract
To define the commonly deleted region on chromosome 8p for further positional cloning of the putative tumor suppressor gene, we carried out allelic imbalance (AI) studies in 41 HCCs using a panel of 37 microsatellite markers. The overall AI on 8p was 87.8% (36 of 41). Among the 36 cases with AI, 13 cases showed AI in all of the loci, suggesting entire deletion on the short arm of chromosome 8, while the remaining 23 cases showed partial AI. Detailed deletion mapping identified two independent commonly deleted regions on chromosome 8p. These were as follows: (1) centered by the D8S1819 and D8S1706 loci between the D8S561 and D8S1825 loci, (2) centered by the D8S1733 locus between the D8S298 and D8S1739 loci. These results suggest that the two putative tumor suppressor genes may be present on chromosome 8p.
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Affiliation(s)
- Z Piao
- Department of Pathology, Yonsei University College of Medicine, Seoul, South Korea
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Ma Y, Liu Y, Piao Z, Hao F. [The effect of inhaled nitric oxide and helium-oxygen mixture on the pulmonary function of asthmatics]. Zhonghua Nei Ke Za Zhi 1999; 38:224-7. [PMID: 11798649] [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: 02/23/2023]
Abstract
OBJECTIVE To investigate the effect of inhaled nitric oxide (NO) combined with helium-oxygen mixture on the pulmonary function of asthmatics. METHODS 18 asthmatic patients were included in this study. The patients were divided into two groups randomly. One group of patients inhaled 100 ppm NO combined with helium-oxygen mixture, the other group inhaled 40 ppm NO-containing helium-oxygen mixture. Pulmonary function was examined intermittently during the study process and compared with that of the patients treated with salbutamol. RESULTS It is shown that inhalation of helium-oxygen mixture improved the forced vital capacity, forced expiratory volume during the first 1.0 second (FEV(1)), peak expiratory flow rate (PEFR) and maximal midexpiratory flow rate (MMEF) significantly as compared with inhalation of air. Although salbutamol inhalation improved FEV(1) and MMEF, the effect was weaker than helium-oxygen mixture inhalation. However the effect of helium-oxygen mixture lasted only one minute. Inhalation of 100 ppm NO with helium-oxygen mixture only slightly improved FEV(1) and PEFR as compared with inhalation of helium-oxygen mixture. 40 ppm NO with helium-oxygen mixture did not influence the pulmonary function in the asthmatic patient as compared with helium-oxygen mixture alone. CONCLUSION It is suggested that inhalation of helium-oxygen mixture can improve the pulmonary function of asthmatic patients significantly. However, inhalation of NO exerts a weak bronchodilatory effect.
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Affiliation(s)
- Y Ma
- Department of Respiratory Medicine, PLA General Hospital, Beijing 100853
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Abstract
Hepatocellular carcinoma (HCC) frequently shows a loss of heterozygosity (LOH) on chromosome 4q. In order to define the commonly affected region on chromosome 4q for further positional cloning of the putative tumor suppressor gene, we carried out allelic imbalance (AI) studies in 41 HCCs using a panel of 43 microsatellite markers. Thirty-four cases (82.9%) showed AI at one or more loci. Detailed deletion mapping identified 7 independent, frequently deleted regions on this chromosome arm. These were the (1) D4S1615 locus, (2) D4S1598 locus, (3) D4S620 locus, (4) D4S1566 and D4S2979 loci, (5) D4S1617 and D4S1545 loci, (6)D4S1537 locus; and (7) from the D4S2920 to D4S2954 locus. Among these 7 frequently deleted regions, 5 were associated with tumor differentiation. Our results suggest that several putative tumor suppressor genes may be present on chromosome 4q and that the AI of chromosome 4q may play a role in the aggressive progression of HCC.
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Affiliation(s)
- Z Piao
- Department of Pathology, Yonsei University, College of Medicine, Seoul, Korea
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Abstract
Hepatocellular carcinoma (HCC) frequently shows a loss of heterozygosity (LOH) on chromosome 4q. In order to define the commonly affected region on chromosome 4q for further positional cloning of the putative tumor suppressor gene, we carried out allelic imbalance (AI) studies in 41 HCCs using a panel of 43 microsatellite markers. Thirty-four cases (82.9%) showed AI at one or more loci. Detailed deletion mapping identified 7 independent, frequently deleted regions on this chromosome arm. These were the (1) D4S1615 locus, (2) D4S1598 locus, (3) D4S620 locus, (4) D4S1566 and D4S2979 loci, (5) D4S1617 and D4S1545 loci, (6)D4S1537 locus; and (7) from the D4S2920 to D4S2954 locus. Among these 7 frequently deleted regions, 5 were associated with tumor differentiation. Our results suggest that several putative tumor suppressor genes may be present on chromosome 4q and that the AI of chromosome 4q may play a role in the aggressive progression of HCC.
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Affiliation(s)
- Z Piao
- Department of Pathology, Yonsei University, College of Medicine, Seoul, Korea
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