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Jo A, Deniz S, Cherian S, Xu J, Futagi D, DeVries SH, Zhu Y. Modular interneuron circuits control motion sensitivity in the mouse retina. Nat Commun 2023; 14:7746. [PMID: 38008788 PMCID: PMC10679153 DOI: 10.1038/s41467-023-43382-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 11/08/2023] [Indexed: 11/28/2023] Open
Abstract
Neural computations arise from highly precise connections between specific types of neurons. Retinal ganglion cells (RGCs) with similar stratification patterns are positioned to receive similar inputs but often display different response properties. In this study, we used intersectional mouse genetics to achieve single-cell type labeling and identified an object motion sensitive (OMS) AC type, COMS-AC(counter-OMS AC). Optogenetic stimulation revealed that COMS-AC makes glycinergic synapses with the OMS-insensitive HD2p-RGC, while chemogenetic inactivation showed that COMS-AC provides inhibitory control to HD2p-RGC during local motion. This local inhibition, combined with the inhibitory drive from TH2-AC during global motion, explains the OMS-insensitive feature of HD2p-RGC. In contrast, COMS-AC fails to make synapses with W3(UHD)-RGC, allowing it to exhibit OMS under the control of VGlut3-AC and TH2-AC. These findings reveal modular interneuron circuits that endow structurally similar RGC types with different responses and present a mechanism for redundancy-reduction in the retina to expand coding capacity.
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Affiliation(s)
- Andrew Jo
- Departments of Ophthalmology and Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Sercan Deniz
- Departments of Ophthalmology and Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Suraj Cherian
- Departments of Ophthalmology and Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Jian Xu
- Departments of Ophthalmology and Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Daiki Futagi
- Departments of Ophthalmology and Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Steven H DeVries
- Departments of Ophthalmology and Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Yongling Zhu
- Departments of Ophthalmology and Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA.
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2
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Jo A, Deniz S, Xu J, Duvoisin RM, DeVries SH, Zhu Y. A sign-inverted receptive field of inhibitory interneurons provides a pathway for ON-OFF interactions in the retina. Nat Commun 2023; 14:5937. [PMID: 37741839 PMCID: PMC10517963 DOI: 10.1038/s41467-023-41638-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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] [Received: 10/19/2022] [Accepted: 09/11/2023] [Indexed: 09/25/2023] Open
Abstract
A fundamental organizing plan of the retina is that visual information is divided into ON and OFF streams that are processed in separate layers. This functional dichotomy originates in the ON and OFF bipolar cells, which then make excitatory glutamatergic synapses onto amacrine and ganglion cells in the inner plexiform layer. We have identified an amacrine cell (AC), the sign-inverting (SI) AC, that challenges this fundamental plan. The glycinergic, ON-stratifying SI-AC has OFF light responses. In opposition to the classical wiring diagrams, it receives inhibitory inputs from glutamatergic ON bipolar cells at mGluR8 synapses, and excitatory inputs from an OFF wide-field AC at electrical synapses. This "inhibitory ON center - excitatory OFF surround" receptive-field of the SI-AC allows it to use monostratified dendrites to conduct crossover inhibition and push-pull activation to enhance light detection by ACs and RGCs in the dark and feature discrimination in the light.
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Affiliation(s)
- Andrew Jo
- Departments of Ophthalmology and Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Sercan Deniz
- Departments of Ophthalmology and Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Jian Xu
- Departments of Ophthalmology and Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Robert M Duvoisin
- Department of Chemical Physiology and Biochemistry, Oregon Health & Science University, Portland, OR, 97239, USA
| | - Steven H DeVries
- Departments of Ophthalmology and Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA.
| | - Yongling Zhu
- Departments of Ophthalmology and Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA.
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3
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Byun J, Kim Y, Seo J, Kim E, Kim K, Jo A, Lee W, Park B. Development and evaluation of photon-counting Cd 0.875Zn 0.125Te 0.98Se 0.02 detector for measuring bone mineral density. Phys Eng Sci Med 2023; 46:245-253. [PMID: 36592283 DOI: 10.1007/s13246-022-01213-4] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 12/21/2022] [Indexed: 01/03/2023]
Abstract
Cadmium zinc telluride (CZT) has been actively researched and developed by researchers in various fields. In medical applications, especially photon-counting, CZT enables improved image quality, multi-material decomposition, and improved dose efficiency. Moreover, band gap engineering and selenium addition on CZT improved electrical, spectroscopic and structural properties, thereby supporting performance of CZT as a photon-counting detector. In this study, it is shown that Cd0.875Zn0.125Te0.98Se0.02 (CZTS) shows sufficient performance without loss of detection efficiency. We carried out a study involving the application of this CZTS on calculating bone mineral density (BMD) values, because this application has a novelty of new material for BMD sensor which follows the CdTe- or CdZnTe- based BMD detector. Anatomical images from different energy bins contained different information of attenuation although the images were taken in the same region at the same time. Moreover, calculated BMD values had a proper tendency depending on the amount of bone in that region. The final BMD value was 1.1972 g/cm2, which is close to the real value of 1.2 g/cm2. The introduction with a bone filter and a smaller pixel size will improve the accuracy and precision of photon-counting CZTS detectors for measuring BMD values. However, in this study the CZTS showed the feasibility that a photon-counting CZTS detector can help the measurement of BMD values and the diagnosis of osteoporosis.
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Affiliation(s)
- J Byun
- Department of Health and Safety Convergence Science, Korea University, Seoul, 02841, Korea
- Interdisciplinary Program in Precision Public Health, Korea University, Seoul, 02841, Korea
| | - Y Kim
- Interdisciplinary Program in Precision Public Health, Korea University, Seoul, 02841, Korea
- Marine Radioactivity Monitoring Group, Korea Marine Environment Management Corporation, Busan, 48931, Korea
| | - J Seo
- Department of Health and Safety Convergence Science, Korea University, Seoul, 02841, Korea
- Interdisciplinary Program in Precision Public Health, Korea University, Seoul, 02841, Korea
| | - E Kim
- Department of Health and Safety Convergence Science, Korea University, Seoul, 02841, Korea
| | - K Kim
- Department of Health and Environmental Science, Korea University, Seoul, 02841, Korea
| | - A Jo
- Health Science Research Center, Korea University, Seoul, 02841, Korea
| | - W Lee
- Department of Health and Environmental Science, Korea University, Seoul, 02841, Korea
- Graduate School, Transdisciplinary Major in Learning Health Systems, Korea University, Seoul, 02841, Korea
| | - B Park
- Department of Health and Safety Convergence Science, Korea University, Seoul, 02841, Korea.
- Interdisciplinary Program in Precision Public Health, Korea University, Seoul, 02841, Korea.
- Liquid Crystals Research Center, Konkuk University, Seoul, 05029, Korea.
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Yun M, Yu M, Duggirala K, Lee K, Jo A, Seah E, Kim C, Cho B. MA07.08 JIN-A02, a Highly Effective 4th Generation EGFR-TKI, Targeting EGFR C797S Triple Mutation in NSCLC. J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.117] [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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Yun M, Yu M, Duggirala K, Lee K, Lim S, Jo A, Seah E, Kim C, Cho B. 999P JIN-A02, a fourth-generation, highly effective tyrosine kinase inhibitor with intracranial activity, targeting EGFR C797S mutations in NSCLC. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.1125] [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: 11/01/2022] Open
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Xu J, Jo A, DeVries RP, Deniz S, Cherian S, Sunmola I, Song X, Marshall JJ, Gruner KA, Daigle TL, Contractor A, Lerner TN, Zeng H, Zhu Y. Intersectional mapping of multi-transmitter neurons and other cell types in the brain. Cell Rep 2022; 40:111036. [PMID: 35793636 PMCID: PMC9290751 DOI: 10.1016/j.celrep.2022.111036] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 04/04/2022] [Accepted: 06/13/2022] [Indexed: 01/04/2023] Open
Abstract
Recent developments in intersectional strategies have greatly advanced our ability to precisely target brain cell types based on unique co-expression patterns. To accelerate the application of intersectional genetics, we perform a brain-wide characterization of 13 Flp and tTA mouse driver lines and selected seven for further analysis based on expression of vesicular neurotransmitter transporters. Using selective Cre driver lines, we created more than 10 Cre/tTA combinational lines for cell type targeting and circuit analysis. We then used VGLUT-Cre/VGAT-Flp combinational lines to identify and map 30 brain regions containing neurons that co-express vesicular glutamate and gamma-aminobutyric acid (GABA) transporters, followed by tracing their projections with intersectional viral vectors. Focusing on the lateral habenula (LHb) as a target, we identified glutamatergic, GABAergic, or co-glutamatergic/GABAergic innervations from ∼40 brain regions. These data provide an important resource for the future application of intersectional strategies and expand our understanding of the neuronal subtypes in the brain.
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Affiliation(s)
- Jian Xu
- Departments of Ophthalmology and Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Department of Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Andrew Jo
- Departments of Ophthalmology and Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Raina P DeVries
- Department of Organismal Biology and Anatomy, The University of Chicago, Chicago, IL 60637, USA
| | - Sercan Deniz
- Departments of Ophthalmology and Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Suraj Cherian
- Departments of Ophthalmology and Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Idris Sunmola
- Departments of Ophthalmology and Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Xingqi Song
- School of Medicine, Shanghai Jiao Tong University, Shanghai 200240, China
| | - John J Marshall
- Department of Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Katherine A Gruner
- Mouse Histology and Phenotyping Laboratory, Northwestern University, Chicago, IL 60611, USA
| | - Tanya L Daigle
- Allen Institute for Brain Science, Seattle, WA 98109, USA
| | - Anis Contractor
- Department of Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Talia N Lerner
- Department of Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Hongkui Zeng
- Allen Institute for Brain Science, Seattle, WA 98109, USA
| | - Yongling Zhu
- Departments of Ophthalmology and Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Department of Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
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Redmon SN, Yarishkin O, Lakk M, Jo A, Mustafić E, Tvrdik P, Križaj D. TRPV4 channels mediate the mechanoresponse in retinal microglia. Glia 2021; 69:1563-1582. [PMID: 33624376 PMCID: PMC8989051 DOI: 10.1002/glia.23979] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 02/02/2021] [Accepted: 02/02/2021] [Indexed: 12/12/2022]
Abstract
The physiological and neurological correlates of plummeting brain osmolality during edema, traumatic CNS injury, and severe ischemia are compounded by neuroinflammation. Using multiple approaches, we investigated how retinal microglia respond to challenges mediated by increases in strain, osmotic gradients, and agonists of the stretch-activated cation channel TRPV4. Dissociated and intact microglia were TRPV4-immunoreactive and responded to the selective agonist GSK1016790A and substrate stretch with altered motility and elevations in intracellular calcium ([Ca2+ ]i ). Agonist- and hypotonicity-induced swelling was associated with a nonselective outwardly rectifying cation current, increased [Ca2+ ]i , and retraction of higher-order processes. The antagonist HC067047 reduced the extent of hypotonicity-induced microglial swelling and inhibited the suppressive effects of GSK1016790A and hypotonicity on microglial branching. Microglial TRPV4 signaling required intermediary activation of phospholipase A2 (PLA2), cytochrome P450, and epoxyeicosatrienoic acid production (EETs). The expression pattern of vanilloid thermoTrp genes in retinal microglia was markedly different from retinal neurons, astrocytes, and cortical microglia. These results suggest that TRPV4 represents a primary retinal microglial sensor of osmochallenges under physiological and pathological conditions. Its activation, associated with PLA2, modulates calcium signaling and cell architecture. TRPV4 inhibition might be a useful strategy to suppress microglial overactivation in the swollen and edematous CNS.
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Affiliation(s)
- Sarah N Redmon
- Department of Ophthalmology & Visual Sciences, Moran Eye Institute, Salt Lake City, Utah, USA
| | - Oleg Yarishkin
- Department of Ophthalmology & Visual Sciences, Moran Eye Institute, Salt Lake City, Utah, USA
| | - Monika Lakk
- Department of Ophthalmology & Visual Sciences, Moran Eye Institute, Salt Lake City, Utah, USA
| | - Andrew Jo
- Department of Ophthalmology & Visual Sciences, Moran Eye Institute, Salt Lake City, Utah, USA
| | - Edin Mustafić
- Department of Ophthalmology & Visual Sciences, Moran Eye Institute, Salt Lake City, Utah, USA
| | - Petr Tvrdik
- Department of Neurological Surgery, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - David Križaj
- Department of Ophthalmology & Visual Sciences, Moran Eye Institute, Salt Lake City, Utah, USA.,Interdepartmental Program in Neuroscience, University of Utah, Salt Lake City, Utah, USA.,Department of Bioengineering, University of Utah, Salt Lake City, Utah, USA.,Department of Neurobiology & Anatomy, University of Utah, Salt Lake City, Utah, USA
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8
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Jo A, Huet C, Naguib HE. Template-Assisted Self-Assembly of Conductive Polymer Electrodes for Ionic Electroactive Polymers. Front Bioeng Biotechnol 2020; 8:837. [PMID: 32850715 PMCID: PMC7412994 DOI: 10.3389/fbioe.2020.00837] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Accepted: 06/30/2020] [Indexed: 11/29/2022] Open
Abstract
Ionic electroactive polymers (ionic EAPs) can greatly aid in biomedical applications where micro-sized actuators are required for delicate procedures. Since these types of actuators generally require platinum or gold metallic electrodes, they tend to be expensive and susceptible to delamination. Previous research has solved this problem by replacing the metallic electrodes with conductive polymers (CP) and forming an interpenetrating polymer network (IPN) between the conductive polymer (CP) and the solid polymer electrolyte (SPE). Since these actuators contain toxic ionic liquids, they are unsuitable for biological applications. In this study, we present a novel and facile method of fabricating a biocompatible and ionic liquid-free actuator that uses semi-IPN to hold the CP and Nafion-based SPE layers together. Surface activated fabrication treatment (SAFT) is applied to the precursor-Nafion membrane in order to convert the sulfonyl fluoride groups on the surface to sulfonate. Through template-assisted self-assembly, the CP electrodes from either polyaniline (PANI) or poly(3,4-ethylenedioxythiophene) (PEDOT) interlock with the surface treated precursor-Nafion membrane so that no delamination can occur. The electrodes growth pattern, interfacial layer's thickness, and shape can be controlled by adjusting the SAFT concentration and duration.
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Affiliation(s)
- Andrew Jo
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, ON, Canada
| | - Clémence Huet
- Department of Material Science and Engineering, Polytech Nantes, Nantes, France
| | - Hani E. Naguib
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, ON, Canada
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON, Canada
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9
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Jo A, Xu J, Deniz S, Cherian S, DeVries SH, Zhu Y. Intersectional Strategies for Targeting Amacrine and Ganglion Cell Types in the Mouse Retina. Front Neural Circuits 2018; 12:66. [PMID: 30186122 PMCID: PMC6113359 DOI: 10.3389/fncir.2018.00066] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 08/02/2018] [Indexed: 12/02/2022] Open
Abstract
The mammalian retina harbors over 100 different cell types. To understand how retinal circuits work, it is essential to systematically access each type. A widely used approach for achieving targeted transgene expression exploits promoter-driven Cre lines. However, Cre expression in a given transgenic line in the retina and elsewhere in the brain is rarely confined to a single cell type, contributing ambiguity to the interpretation of results from broadly applied manipulations. To obtain unambiguous information about retinal processing, it is desirable to have strategies for further restricting transgene expression to a few or even to a single cell type. We employed an intersectional strategy based on a Cre/Flp double recombinase system to target amacrine and ganglion cell types in the inner retina. We analyzed expression patterns in seven Flp drivers and then created combinational mouse lines by selective cross breeding with Cre drivers. Breeding with Flp drivers can routinely remove labeling from more than 90% of the cells in Cre drivers, leading to only a handful cell types, typically 2–3, remaining in the intersection. Cre/Flp combinatorial mouse lines enabled us to identify and anatomically characterize retinal cell types with greater ease and demonstrated the feasibility of intersectional strategies in retinal research. In addition to the retina, we examined Flp expression in the lateral geniculate nucleus and superior colliculus. Our results establish a foundation for future application of intersectional strategies in the retina and retino-recipient regions.
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Affiliation(s)
- Andrew Jo
- Department of Ophthalmology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States
| | - Jian Xu
- Department of Physiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States
| | - Sercan Deniz
- Department of Ophthalmology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States
| | - Suraj Cherian
- Department of Physiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States
| | - Steven H DeVries
- Department of Ophthalmology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States.,Department of Physiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States
| | - Yongling Zhu
- Department of Ophthalmology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States.,Department of Physiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States
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Jang S, Jo A, Kook K. Isolation of adipose stromal vascular fraction and adipose derived stem cells from defferent donor age, sites and sex using 5 year data. Cytotherapy 2018. [DOI: 10.1016/j.jcyt.2018.02.104] [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: 12/01/2022]
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Jeon YJ, Lim JH, An S, Jo A, Han DH, Won TB, Kim DY, Rhee CS, Kim HJ. Cover Image. Clin Exp Allergy 2018. [DOI: 10.1111/cea.13125] [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: 11/30/2022]
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12
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Jeon YJ, Lim JH, An S, Jo A, Han DH, Won TB, Kim DY, Rhee CS, Kim HJ. Type III interferons are critical host factors that determine susceptibility to Influenza A viral infection in allergic nasal mucosa. Clin Exp Allergy 2018; 48:253-265. [DOI: 10.1111/cea.13082] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Revised: 12/13/2017] [Accepted: 12/15/2017] [Indexed: 02/01/2023]
Affiliation(s)
- Y. J. Jeon
- Department of Otorhinolaryngology-Head and Neck Surgery; Seoul National University Hospital; Seoul Korea
| | - J. H. Lim
- Department of Otorhinolaryngology-Head and Neck Surgery; Seoul National University Hospital; Seoul Korea
| | - S. An
- Department of Otorhinolaryngology-Head and Neck Surgery; Seoul National University College of Medicine; Seoul Korea
| | - A. Jo
- Department of Otorhinolaryngology-Head and Neck Surgery; Seoul National University College of Medicine; Seoul Korea
| | - D. H. Han
- Department of Otorhinolaryngology-Head and Neck Surgery; Seoul National University Hospital; Seoul Korea
- Department of Otorhinolaryngology-Head and Neck Surgery; Seoul National University College of Medicine; Seoul Korea
| | - T.-B. Won
- Department of Otorhinolaryngology-Head and Neck Surgery; Seoul National University Hospital; Seoul Korea
- Department of Otorhinolaryngology-Head and Neck Surgery; Seoul National University College of Medicine; Seoul Korea
| | - D.-Y. Kim
- Department of Otorhinolaryngology-Head and Neck Surgery; Seoul National University Hospital; Seoul Korea
- Department of Otorhinolaryngology-Head and Neck Surgery; Seoul National University College of Medicine; Seoul Korea
| | - C.-S. Rhee
- Department of Otorhinolaryngology-Head and Neck Surgery; Seoul National University Hospital; Seoul Korea
- Department of Otorhinolaryngology-Head and Neck Surgery; Seoul National University College of Medicine; Seoul Korea
| | - H. J. Kim
- Department of Otorhinolaryngology-Head and Neck Surgery; Seoul National University Hospital; Seoul Korea
- Department of Otorhinolaryngology-Head and Neck Surgery; Seoul National University College of Medicine; Seoul Korea
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Mishra A, Nam GH, Gim JA, Lee HE, Jo A, Yoon D, Oh S, Kim S, Kim A, Kim DH, Kim YC, Jeong HD, Cha HJ, Choi YH, Kim HS. Comparative evaluation of MCP gene in worldwide strains of Megalocytivirus (Iridoviridae family) for early diagnostic marker. J Fish Dis 2018; 41:105-116. [PMID: 28914452 DOI: 10.1111/jfd.12685] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 06/18/2017] [Accepted: 06/19/2017] [Indexed: 06/07/2023]
Abstract
Members of the Iridoviridae family have been considered as aetiological agents of iridovirus diseases, causing fish mortalities and economic losses all over the world. Virus identification based on candidate gene sequencing is faster, more accurate and more reliable than other traditional phenotype methodologies. Iridoviridae viruses are covered by a protein shell (capsid) encoded by the important candidate gene, major capsid protein (MCP). In this study, we investigated the potential of the MCP gene for use in the diagnosis and identification of infections caused Megalocytivirus of the Iridoviridae family. We selected data of 66 Iridoviridae family isolates (53 strains of Megalocytivirus, eight strains of iridoviruses and five strains of Ranavirus) infecting various species of fish distributed all over the world. A total of 53 strains of Megalocytivirus were used for designing the complete primer sets for identifying the most hypervariable region of the MCP gene. Further, our in silico analysis of 102 sequences of related and unrelated viruses reconfirms that primer sets could identify strains more specifically and offers a useful and fast alternative for routine clinical laboratory testing. Our findings suggest that phenotype observation along with diagnosis using universal primer sets can help detect infection or carriers at an early stage.
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Affiliation(s)
- A Mishra
- Genetic Engineering Institute, Pusan National University, Busan, Korea
| | - G-H Nam
- Genetic Engineering Institute, Pusan National University, Busan, Korea
- Department of Biological Sciences, College of Natural Sciences, Pusan National University, Busan, Korea
| | - J-A Gim
- Department of Biological Sciences, College of Natural Sciences, Pusan National University, Busan, Korea
| | - H-E Lee
- Genetic Engineering Institute, Pusan National University, Busan, Korea
- Department of Biological Sciences, College of Natural Sciences, Pusan National University, Busan, Korea
| | - A Jo
- Genetic Engineering Institute, Pusan National University, Busan, Korea
- Department of Biological Sciences, College of Natural Sciences, Pusan National University, Busan, Korea
| | - D Yoon
- Department of Chemistry, College of Natural Sciences, Pusan National University, Busan, Korea
| | - S Oh
- Department of Chemistry, College of Natural Sciences, Pusan National University, Busan, Korea
| | - S Kim
- Department of Chemistry, College of Natural Sciences, Pusan National University, Busan, Korea
| | - A Kim
- Department of Aquatic Life Medicine, Pukyong National University, Busan, Korea
| | - D-H Kim
- Department of Aquatic Life Medicine, Pukyong National University, Busan, Korea
| | - Y C Kim
- Department of Aquatic Life Medicine, Pukyong National University, Busan, Korea
| | - H D Jeong
- Department of Aquatic Life Medicine, Pukyong National University, Busan, Korea
| | - H-J Cha
- Departments of Parasitology and Genetics, College of Medicine, Kosin University, Busan, Korea
| | - Y H Choi
- Department of Biochemistry, College of Korean Medicine, Dongeui University, Busan, Korea
| | - H-S Kim
- Genetic Engineering Institute, Pusan National University, Busan, Korea
- Department of Biological Sciences, College of Natural Sciences, Pusan National University, Busan, Korea
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14
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Jo A, Hoi H, Zhou H, Gupta M, Montemagno CD. Single-molecule study of full-length NaChBac by planar lipid bilayer recording. PLoS One 2017; 12:e0188861. [PMID: 29190805 PMCID: PMC5708646 DOI: 10.1371/journal.pone.0188861] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Accepted: 11/14/2017] [Indexed: 01/03/2023] Open
Abstract
Planar lipid bilayer device, alternatively known as BLM, is a powerful tool to study functional properties of conducting membrane proteins such as ion channels and porins. In this work, we used BLM to study the prokaryotic voltage-gated sodium channel (Nav) NaChBac in a well-defined membrane environment. Navs are an essential component for the generation and propagation of electric signals in excitable cells. The successes in the biochemical, biophysical and crystallographic studies on prokaryotic Navs in recent years has greatly promoted the understanding of the molecular mechanism that underlies these proteins and their eukaryotic counterparts. In this work, we investigated the single-molecule conductance and ionic selectivity behavior of NaChBac. Purified NaChBac protein was first reconstituted into lipid vesicles, which is subsequently incorporated into planar lipid bilayer by fusion. At single-molecule level, we were able to observe three distinct long-lived conductance sub-states of NaChBac. Change in the membrane potential switches on the channel mainly by increasing its opening probability. In addition, we found that individual NaChBac has similar permeability for Na+, K+, and Ca2+. The single-molecule behavior of the full-length protein is essentially highly stochastic. Our results show that planar lipid bilayer device can be used to study purified ion channels at single-molecule level in an artificial environment, and such studies can reveal new protein properties that are otherwise not observable in in vivo ensemble studies.
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Affiliation(s)
- Andrew Jo
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada
- Ingenuity Lab, Edmonton, Alberta, Canada
| | - Hiofan Hoi
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada
- Ingenuity Lab, Edmonton, Alberta, Canada
- * E-mail: (HH); (CDM)
| | - Hang Zhou
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada
- Ingenuity Lab, Edmonton, Alberta, Canada
| | - Manisha Gupta
- Ingenuity Lab, Edmonton, Alberta, Canada
- Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta, Canada
| | - Carlo D. Montemagno
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada
- Ingenuity Lab, Edmonton, Alberta, Canada
- National Institute for Nanotechnology, Edmonton, Alberta, Canada
- * E-mail: (HH); (CDM)
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Chick J, Jo A, Meadows J, Abramowitz S, Khaja M, Cooper K. Endovascular Iliocaval Stent Reconstruction for Inferior Vena Cava Filter-Associated Iliocaval Thrombosis: Approach, Technical Success, Safety, and Two-Year Outcomes in 120 Patients. J Vasc Surg Venous Lymphat Disord 2017. [DOI: 10.1016/j.jvsv.2017.06.011] [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: 10/19/2022]
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16
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Jang S, Jo A, Yoon W, Kook K. Stromal vascular fraction and adipose derived stem cells from chronic disease and obese patients can affect stem cell therapy. Cytotherapy 2017. [DOI: 10.1016/j.jcyt.2017.02.250] [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: 10/19/2022]
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17
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Hoi H, Jo A, Gupta M, Montemagno CD. In Vitro Single-Molecule Study of Nachbac using Planar Lipid Bilayer Device. Biophys J 2017. [DOI: 10.1016/j.bpj.2016.11.596] [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: 11/17/2022] Open
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Furuishi T, Ishigami T, Endo T, Nagase H, Okada M, Nishiyama I, Jo A, Terao K, Ueda H. Effect of γ-cyclodextrin as a lyoprotectant for freeze-dried actinidin. Pharmazie 2015; 70:296-299. [PMID: 26062296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Actinidin (ATD) is a cysteine protease found in kiwifruit. It is used to tenderize meat and to enhance the digestion of proteins in the small intestine. However, ATD is unstable during freeze-drying, which alters its bioactivity. It is well known that sugars have the ability to protect proteins from the stress of freeze-drying. In this study, we investigated the protective effect of various saccharides on the stability of ATD during freeze-drying. The ATD activities of the samples containing γ-cyclodextrin (CyD) showed only a small decrease, and compared with trehalose and sucrose, γ-CyD was a more effective stabilizer for ATD. Secondary structural changes in freeze-dried ATD were observed by circular dichroism spectroscopy and compared with the changes in stabilized samples. There was a close relationship between the α-helix content and the stabilization. The sugars stabilized the protein by suppressing the changes in the α-helix. Fourier transform infrared spectroscopy measurement showed that the amide I band of ATD with γ-CyD was shifted to a lower wavenumber compared with other sugars. Therefore, stronger hydrogen bonds may be formed between ATD and γ-CyD than between ATD and other sugars. The suppression of changes in the protein secondary structure accompanying the formation of hydrogen bonding between the protein and the sugar also contributed to the protective effect of the sugars.
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Nersisyan H, Won H, Won C, Jo A, Kim J. Effective two-step method for producing Ti–6Al–4V alloy particles with various morphologies. POWDER TECHNOL 2014. [DOI: 10.1016/j.powtec.2014.01.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Allen M, Allen LB, Allen JW, Marumatakimanu F, Jo A, Dawson K, Kauwe AI. PT444 Rheumatic Rescue: Age-related prevalence of rheumatic heart disease related to World Heart Federation criteria. Glob Heart 2014. [DOI: 10.1016/j.gheart.2014.03.2152] [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: 11/30/2022] Open
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21
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Jo A, Ishibashi Y, Hirohama D, Takara Y, Kume H, Fujita T. Early surgical intervention may prevent peritonitis in cases with Tenckhoff catheter infection by nontuberculous mycobacterium. Perit Dial Int 2012; 32:227-9. [PMID: 22383730 DOI: 10.3747/pdi.2011.00080] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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22
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Strunk M, Bucerius J, Jaeger U, Ezziddin S, Flacke S, Jo A, Behrends K, Palmedo H. PET-CT in der Nachsorge des kolorektalen Karzinoms: Einfluss der Bildfusion auf die Staging-Genauigkeit. ROFO-FORTSCHR RONTG 2005. [DOI: 10.1055/s-2005-867815] [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: 10/19/2022]
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23
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Aratani Y, Yoshiga K, Mizuuchi H, Jo A, Tanimoto K, Sakurai K. Antitumor effect of carboplatin combined with radiation on tumors in mice. Anticancer Res 1997; 17:2535-8. [PMID: 9252676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The antitumor effect of cis-diammine-1, 1-cyclobutane dicarboxylate platinum(II) (CBDCA, Carboplatin) and radiation on Ehrlich ascites tumors was evaluated in CD-1 mice. A single dose of CBDCA was combined with a single dose of radiation. The antitumor effect was evaluated by tumor volume. Inhibition of tumor growth by the combination of CBDCA and radiation was greater than by CBDCA and radiation alone. The most effective condition was the simultaneous combination of CBDCA with radiation. Further, we examined the radiation influence on the concentration of platinum in tumor tissue. We found that when CBDCA was administered after irradiation, the concentration of platinum in tumor tissue decreased proportionally with time.
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Affiliation(s)
- Y Aratani
- Department of Oral and Maxillofacial Surgery I, Hiroshima University School of Dentistry, Japan
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Jo A, Sakurai K, Tsumura M, Mizuuchi H, Yoshiga K, Takada K. Enhancement of antitumor effects of new analogue of platinum, cis-diammine (glycolato) platinum (254-S) combined with hyperthermia in vivo. Anticancer Res 1996; 16:301-4. [PMID: 8615625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Cis-diammine (glycolato) platinum (254-S) is a second generation platinum complex with reduced nephrotoxicity. In this study the antitumor effect of 254-S combined with hyperthermia in vivo in mice was studied. On the 6th day after inoculation of the Ehrlich ascites tumour cells, 254-S (15mg/kg) was administered intraperitoneally (i.p.) and hyperthermia was induced by using a circulating water bath at 42.5 degrees C for 45 min. The antitumour effect was evaluated by relative tumour volume. Furthermore, platinum concentration in tumour tissue was determined by using atomic absorption spectrophotometry. The most effective condition was found to be the combination of 254-S with hyperthermia. A significantly higher concentration of platinum in the tumour tissue was observed when treatment with 254-S was combined with hyperthermia, than with treatment using 254-S alone. Our study suggested that the accumulation of 254-S in the tumour tissue, and its retention at a high concentration within the tumour tissue long term was one of the reasons for the enhancement of antitumour effect of 254-S treatment when combined with hyperthermia.
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Affiliation(s)
- A Jo
- Department of Oral and Maxillofacial Surgery 1, Hiroshima University School of Dentistry, Japan
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Jo A, Rizen V, Nikolić V, Banović B. The role of orbital wall morphological properties and their supporting structures in the etiology of "blow-out" fractures. Surg Radiol Anat 1989; 11:241-8. [PMID: 2588101 DOI: 10.1007/bf02337832] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The stiffness and strength of the orbital walls are proportionally dependent on the anatomical structures which support and strengthen these walls from the opposite side. The medial wall is therefore strong due to the support of ethmoid cells. The floor is stronger the less surface there is and the more supported it is by trabeculae of the maxillar sinus. The strength of the upper and lateral walls are proportional to their thickness. The orbital floor is on the average the weakest, followed by the medial and upper walls. The lateral wall is the stiffest and the most rigid. Computed tomography (CT) has improved structural analysis of the orbital contents and orbital walls enabling the visualisation of superficial and deep soft tissues and bone structures.
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Affiliation(s)
- A Jo
- Drago Perović Department of Anatomy, Medical Faculty, Zagreb, Yugoslavia
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Nikolić V, Hudec M, Marotti M, Jo A, Lovrić A. Three-dimensional structural analysis of the locomotor system. J Biomech 1985. [DOI: 10.1016/0021-9290(85)90739-0] [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: 10/26/2022]
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Krmpotić-Nemanić J, Nemanić G, Jo A. Die Vorteile und Nachteile der Eingriffe am vegetativen Nervensystem der Nase vom anatomischen Standpunkt aus betrachtet. Eur Arch Otorhinolaryngol 1981. [DOI: 10.1007/bf00501626] [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: 10/26/2022]
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29
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Jo A, Buković D. [Morphological studies of the arch of oral cavity]. Rad Med Fak Zagrebu 1970; 18:239-250. [PMID: 5524048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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