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Lee KB, Kim MH, Yoon JT, Song Y, Kwon B, Hwang SM, Choi JH, Lee DH. A simplified cranial cavity model to understand the relationship between intracranial pressure and dural sinus pressure. Interv Neuroradiol 2024; 30:57-63. [PMID: 35679068 PMCID: PMC10956465 DOI: 10.1177/15910199221107440] [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: 03/23/2022] [Accepted: 05/27/2022] [Indexed: 11/15/2022] Open
Abstract
Although accurate intracranial pressure (ICP) monitoring is essential for the diagnosis and treatment of severe brain diseases, current methods are performed invasively. Therefore, a safe and less invasive ICP measurement is required. The purpose of our study was to develop a simplified cranial cavity model for a better understanding of the relationship between the ICP and the pressure measurement within the dural venous sinus (DVS) to support the validity of using sinus pressure as the surrogate of the ICP. The in-house cranial cavity model had three components: the brain part, the DVS part, and the subarachnoid space (SAS) part. Pressure in other parts was measured when the pressure in the SAS part and, separately, brain part was increased from 0 (baseline) to 50 mmHg at intervals of 10 mmHg. When the pressure in the SAS part was increased from 10 to 50 mmHg at 10 mmHg interval, pressures of both the brain and DVS parts increased without significant difference (all P > 0.05). However, pressures in both the SAS and DVS parts differed while the pressure in the brain part was increased. The pressures in both parts showed about 70% of the increase in the brain part. Nevertheless, the pressures in the SAS and DVS parts were not significantly different (P > 0.05). A simplified in-house cranial cavity model was developed consisting of three compartments to represent the actual intracranial spaces. The pressure measurement within the DVS was feasible to use as a surrogate for the ICP measurement.
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Affiliation(s)
- KB Lee
- Department of Radiologic Technology, Chungbuk Health & Science University, Cheongju 28150, Republic of Korea
| | - MH Kim
- Department of Radiology, Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Republic of Korea
| | - J-T Yoon
- Department of Radiology, Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Republic of Korea
| | - Y Song
- Department of Radiology, Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Republic of Korea
| | - B Kwon
- Department of Radiology, Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Republic of Korea
| | - SM Hwang
- Department of Radiology, Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Republic of Korea
| | - JH Choi
- Department of Radiology, Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Republic of Korea
| | - DH Lee
- Department of Radiology, Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Republic of Korea
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Cote JM, Hood A, Kwon B, Smith JC, Houpt TA. Behavioral and neural responses to high-strength magnetic fields are reduced in otolith mutant mice. Am J Physiol Regul Integr Comp Physiol 2023; 325:R181-R192. [PMID: 37306398 PMCID: PMC10393321 DOI: 10.1152/ajpregu.00317.2022] [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: 12/21/2022] [Revised: 06/06/2023] [Accepted: 06/06/2023] [Indexed: 06/13/2023]
Abstract
Static high magnetic fields (MFs) interact with the vestibular system of humans and rodents. In rats and mice, exposure to MFs causes perturbations such as head movements, circular locomotion, suppressed rearing, nystagmus, and conditioned taste aversion acquisition. To test the role of otoconia, two mutant mouse models were examined, head-tilt Nox3het (het) and tilted Otop1 (tlt), with mutations, respectively, in Nox3, encoding the NADPH oxidase 3 enzyme, and Otop1, encoding the otopetrin 1 proton channel, which are normally expressed in the otolith organs, and are critical for otoconia formation. Consequently, both mutants show a near complete loss of otoconia in the utricle and saccule, and are nonresponsive to linear acceleration. Mice were exposed to a 14.1 Tesla MF for 30 min. After exposure, locomotor activity, conditioned taste aversion and c-Fos (in het) were assessed. Wild-type mice exposed to the MF showed suppressed rearing, increased latency to rear, locomotor circling, and c-Fos in brainstem nuclei related to vestibular processing (prepositus, spinal vestibular, and supragenual nuclei). Mutant het mice showed no response to the magnet and were similar to sham animals in all assays. Unlike het, tlt mutants exposed to the MF showed significant locomotor circling and suppressed rearing compared with sham controls, although they failed to acquire a taste aversion. The residual responsiveness of tlt versus het mice might reflect a greater semicircular deficit in het mice. These results demonstrate the necessity of the otoconia for the full effect of exposure to high MFs, but also suggest a semicircular contribution.
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Affiliation(s)
- Jason M Cote
- Department of Biological Science, Florida State University, Tallahassee, Florida, United States
| | - Alison Hood
- Department of Biological Science, Florida State University, Tallahassee, Florida, United States
| | - Bumsup Kwon
- Department of Biological Science, Florida State University, Tallahassee, Florida, United States
| | - James C Smith
- Department of Psychology, Florida State University, Tallahassee, Florida, United States
| | - Thomas A Houpt
- Department of Biological Science, Florida State University, Tallahassee, Florida, United States
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Querfurth H, Marshall J, Parang K, Rioult-Pedotti MS, Tiwari R, Kwon B, Reisinger S, Lee HK. A PDK-1 allosteric agonist neutralizes insulin signaling derangements and beta-amyloid toxicity in neuronal cells and in vitro. PLoS One 2022; 17:e0261696. [PMID: 35061720 PMCID: PMC8782417 DOI: 10.1371/journal.pone.0261696] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 05/31/2021] [Accepted: 12/08/2021] [Indexed: 01/09/2023] Open
Abstract
The Alzheimer’s brain is affected by multiple pathophysiological processes, which include a unique, organ-specific form of insulin resistance that begins early in its course. An additional complexity arises from the four-fold risk of Alzheimer’s Disease (AD) in type 2 diabetics, however there is no definitive proof of causation. Several strategies to improve brain insulin signaling have been proposed and some have been clinically tested. We report findings on a small allosteric molecule that reverses several indices of insulin insensitivity in both cell culture and in vitro models of AD that emphasize the intracellular accumulation of β-amyloid (Aβi). PS48, a chlorophenyl pentenoic acid, is an allosteric activator of PDK-1, which is an Akt-kinase in the insulin/PI3K pathway. PS48 was active at 10 nM to 1 μM in restoring normal insulin-dependent Akt activation and in mitigating Aβi peptide toxicity. Synaptic plasticity (LTP) in prefrontal cortical slices from normal rat exposed to Aβ oligomers also benefited from PS48. During these experiments, neither overstimulation of PI3K/Akt signaling nor toxic effects on cells was observed. Another neurotoxicity model producing insulin insensitivity, utilizing palmitic acid, also responded to PS48 treatment, thus validating the target and indicating that its therapeutic potential may extend outside of β-amyloid reliance. The described in vitro and cell based-in vitro coupled enzymatic assay systems proved suitable platforms to screen a preliminary library of new analogs.
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Affiliation(s)
- Henry Querfurth
- Department of Neurology, Tufts Medical Center, Boston, MA, United States of America
- * E-mail:
| | - John Marshall
- Department of Molecular Pharmacology, Physiology, and Biotechnology, Brown University, Providence, RI, United States of America
| | - Keykavous Parang
- Center for Targeted Drug Delivery, Chapman University, School of Pharmacology, Irvine, CA United States of America
| | - Mengia S. Rioult-Pedotti
- Department of Molecular Pharmacology, Physiology, and Biotechnology, Brown University, Providence, RI, United States of America
- Department of Neurology, Clinical Neurorehabilitation, University of Zurich, Zurich, Switzerland
| | - Rakesh Tiwari
- Center for Targeted Drug Delivery, Chapman University, School of Pharmacology, Irvine, CA United States of America
| | - Bumsup Kwon
- Department of Neurology, Rhode Island Hospital, Providence, RI, United States of America
| | | | - Han-Kyu Lee
- Department of Neurology, Tufts Medical Center, Boston, MA, United States of America
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Kwon B, George A, Plamoottil C, Stead T, Ganti L. 119 Acute Stroke, Thrombolytics and Litigation: Reasons Physicians Get Sued. Ann Emerg Med 2021. [DOI: 10.1016/j.annemergmed.2021.09.129] [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: 11/29/2022]
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Kim W, Steele AD, Zhu W, Csatary EE, Fricke N, Dekarske MM, Jayamani E, Pan W, Kwon B, Sinitsa IF, Rosen JL, Conery AL, Fuchs BB, Vlahovska PM, Ausubel FM, Gao H, Wuest WM, Mylonakis E. Discovery and Optimization of nTZDpa as an Antibiotic Effective Against Bacterial Persisters. ACS Infect Dis 2018; 4:1540-1545. [PMID: 30132650 DOI: 10.1021/acsinfecdis.8b00161] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Conventional antibiotics are not effective in treating infections caused by drug-resistant or persistent nongrowing bacteria, creating a dire need for the development of new antibiotics. We report that the small molecule nTZDpa, previously characterized as a nonthiazolidinedione peroxisome proliferator-activated receptor gamma partial agonist, kills both growing and persistent Staphylococcus aureus cells by lipid bilayer disruption. S. aureus exhibited no detectable development of resistance to nTZDpa, and the compound acted synergistically with aminoglycosides. We improved both the potency and selectivity of nTZDpa against MRSA membranes compared to mammalian membranes by leveraging synthetic chemistry guided by molecular dynamics simulations. These studies provide key insights into the design of selective and potent membrane-active antibiotics effective against bacterial persisters.
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Affiliation(s)
- Wooseong Kim
- Division of Infectious Diseases, Rhode Island Hospital and Warren Alpert Medical School of Brown University, 593 Eddy Street, Providence, Rhode Island 02903, United States
| | - Andrew D. Steele
- Department of Chemistry and Emory Antibiotic Resistance Center, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Wenpeng Zhu
- School of Engineering, Brown University, 184 Hope Street, Providence, Rhode Island 02903, United States
| | - Erika E. Csatary
- Department of Chemistry and Emory Antibiotic Resistance Center, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Nico Fricke
- School of Engineering, Brown University, 184 Hope Street, Providence, Rhode Island 02903, United States
| | - Madeline M. Dekarske
- Department of Chemistry and Emory Antibiotic Resistance Center, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Elamparithi Jayamani
- Division of Infectious Diseases, Rhode Island Hospital and Warren Alpert Medical School of Brown University, 593 Eddy Street, Providence, Rhode Island 02903, United States
| | - Wen Pan
- Division of Infectious Diseases, Rhode Island Hospital and Warren Alpert Medical School of Brown University, 593 Eddy Street, Providence, Rhode Island 02903, United States
| | - Bumsup Kwon
- Division of Neurology, Rhode Island Hospital and Warren Alpert Medical School of Brown University, 593 Eddy Street, Providence, Rhode Island 02903, United States
| | - Isabelle F. Sinitsa
- Department of Chemistry, Temple University, 1901 N. 13th Street, Philadelphia, Pennsylvania 19122, United States
| | - Jake L. Rosen
- Department of Chemistry and Emory Antibiotic Resistance Center, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Annie L. Conery
- Department of Molecular Biology, Massachusetts General Hospital, 185 Cambridge Street, Boston, Massachusetts 02115, United States
- Department of Genetics, Harvard Medical School, 185 Cambridge Street, Boston, Massachusetts 02115, United States
| | - Beth Burgwyn Fuchs
- Division of Infectious Diseases, Rhode Island Hospital and Warren Alpert Medical School of Brown University, 593 Eddy Street, Providence, Rhode Island 02903, United States
| | - Petia M. Vlahovska
- Department of Engineering Sciences and Applied Mathematics, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Frederick M. Ausubel
- Department of Molecular Biology, Massachusetts General Hospital, 185 Cambridge Street, Boston, Massachusetts 02115, United States
- Department of Genetics, Harvard Medical School, 185 Cambridge Street, Boston, Massachusetts 02115, United States
| | - Huajian Gao
- School of Engineering, Brown University, 184 Hope Street, Providence, Rhode Island 02903, United States
| | - William M. Wuest
- Department of Chemistry and Emory Antibiotic Resistance Center, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Eleftherios Mylonakis
- Division of Infectious Diseases, Rhode Island Hospital and Warren Alpert Medical School of Brown University, 593 Eddy Street, Providence, Rhode Island 02903, United States
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Kang D, Choi C, Kim H, Park S, Kim S, Ryu D, Ko J, Lee J, Lee J, Lee K, Kwon B, Kim H, Nam H. Associated factors with overlooked multiple synchronous gastric epithelial neoplasia. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy151.068] [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: 11/13/2022] Open
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Kim S, Choi C, Kang D, Kim H, Park S, Ryu D, Ko J, Kim H, Kwon B, Lee K, Lee J, Lee J, Nam H. Clinical outcomes of endoscopic submucosal dissection for lesions on the proximal location of the stomach. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy151.067] [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: 11/14/2022] Open
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Kang D, Kim H, Choi C, Park S, Kim S, Nam H, Ryu D, Ko J, Kim H, Kwon B, Lee K, Lee J, Lee J. Long-term clinical outcomes in large colorectal polyps with indefinite or positive resection margin after endoscopic resection. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy151.228] [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: 11/14/2022] Open
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Johnston T, Van Tyne D, Chen RF, Fawzi NL, Kwon B, Kelso MJ, Gilmore MS, Mylonakis E. Propyl-5-hydroxy-3-methyl-1-phenyl-1H-pyrazole-4-carbodithioate (HMPC): a new bacteriostatic agent against methicillin-resistant Staphylococcus aureus. Sci Rep 2018; 8:7062. [PMID: 29728636 PMCID: PMC5935714 DOI: 10.1038/s41598-018-25571-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 01/24/2018] [Accepted: 04/20/2018] [Indexed: 01/03/2023] Open
Abstract
The emergence of Staphylococcus aureus strains resistant to ‘last resort’ antibiotics compels the development of new antimicrobials against this important human pathogen. We found that propyl 5-hydroxy-3-methyl-1-phenyl-1H-pyrazole-4-carbodithioate (HMPC) shows bacteriostatic activity against S. aureus (MIC = 4 μg/ml) and rescues Caenorhabditis elegans from S. aureus infection. Whole-genome sequencing of S. aureus mutants resistant to the compound, along with screening of a S. aureus promoter-lux reporter array, were used to explore possible mechanisms of action. All mutants resistant to HMPC acquired missense mutations at distinct codon positions in the global transcriptional regulator mgrA, followed by secondary mutations in the phosphatidylglycerol lysyltransferase fmtC/mprF. The S. aureus promoter-lux array treated with HMPC displayed a luminescence profile that was unique but showed similarity to DNA-damaging agents and/or DNA replication inhibitors. Overall, HMPC is a new anti-staphylococcal compound that appears to act via an unknown mechanism linked to the global transcriptional regulator MgrA.
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Affiliation(s)
- Tatiana Johnston
- Department of Infectious Disease, Rhode Island Hospital, Alpert Medical School of Brown University, Providence, Rhode Island, USA
| | - Daria Van Tyne
- Department of Ophthalmology, Harvard Medical School, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, USA.,Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts, USA
| | - Roy F Chen
- Department of Infectious Disease, Rhode Island Hospital, Alpert Medical School of Brown University, Providence, Rhode Island, USA
| | - Nicolas L Fawzi
- Department of Molecular Pharmacology, Physiology, and Biotechnology, Brown University, Providence, Rhode Island, USA
| | - Bumsup Kwon
- Department of Neurology, Rhode Island Hospital, Warren Alpert Medical School of Brown University, Providence, RI, 02903, USA
| | - Michael J Kelso
- School of Chemistry and Illawarra Health and Medical Research Institute, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Michael S Gilmore
- Department of Ophthalmology, Harvard Medical School, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, USA.,Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts, USA
| | - Eleftherios Mylonakis
- Department of Infectious Disease, Rhode Island Hospital, Alpert Medical School of Brown University, Providence, Rhode Island, USA.
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Lee HK, Kwon B, Lemere CA, de la Monte S, Itamura K, Ha AY, Querfurth HW. mTORC2 (Rictor) in Alzheimer's Disease and Reversal of Amyloid-β Expression-Induced Insulin Resistance and Toxicity in Rat Primary Cortical Neurons. J Alzheimers Dis 2018; 56:1015-1036. [PMID: 28035937 DOI: 10.3233/jad-161029] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Mammalian target of rapamycin complex 1 (mTORC1), a nutrient sensor and central controller of cell growth and proliferation, is altered in various models of Alzheimer's disease (AD). Even less studied or understood in AD is mammalian target of rapamycin complex 2 (mTORC2) that influences cellular metabolism, in part through the regulations of Akt/PKB and SGK. Dysregulation of insulin/PI3K/Akt signaling is another important feature of AD pathogenesis. We found that both total mTORC1 and C2 protein levels and individual C1 and C2 enzymatic activities were decreased in human AD brain samples. In two rodent AD models, mTORC1 and C2 activities were also decreased. In a neuronal culture model of AD characterized by accumulation of cellular amyloid-β (Aβ)42, mTORC1 activity was reduced. Autophagic vesicles and markers were correspondingly increased and new protein synthesis was inhibited, consistent with mTORC1 hypofunction. Interestingly, mTORC2 activity in neural culture seemed resistant to the effects of intracellular amyloid. In various cell lines, Aβ expression provoked insulin resistance, characterized by inhibition of stimulated Akt phosphorylation, and an increase in negative mTORC1 regular, p-AMPK, itself a nutrient sensor. Rapamycin decreased phospho-mTOR and to lesser degree p-Rictor. This further suppression of mTORC1 activity protected cells from Aβ-induced toxicity and insulin resistance. More striking, Rictor over-expression fully reversed the Aβ-effects on primary neuronal cultures. Finally, using in vitro assay, Rictor protein addition completely overcame oligomeric Aβ-induced inhibition of the PDK-Akt activation step. We conclude that striking a new balance by restoring mTORC2 abundance and/or inhibition of mTORC1 has therapeutic potential in AD.
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Affiliation(s)
- Han-Kyu Lee
- Department of Neurology, Rhode Island Hospital and Brown University Warren Alpert Medical School, Providence, RI, USA
| | - Bumsup Kwon
- Department of Neurology, Rhode Island Hospital and Brown University Warren Alpert Medical School, Providence, RI, USA
| | - Cynthia A Lemere
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Suzanne de la Monte
- Department of Pathology, Rhode Island Hospital and Brown University Warren Alpert Medical School, Providence, RI, USA
| | - Kyohei Itamura
- Department of Neurology, Rhode Island Hospital and Brown University Warren Alpert Medical School, Providence, RI, USA
| | - Austin Y Ha
- Department of Neurology, Rhode Island Hospital and Brown University Warren Alpert Medical School, Providence, RI, USA
| | - Henry W Querfurth
- Department of Neurology, Rhode Island Hospital and Brown University Warren Alpert Medical School, Providence, RI, USA
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Park J, Kwon B, Ahn JH, Kim J, Jung K, Gong G, Lee H, Son BH, Ahn SH, Kim HH, Shin H, Moon D, Kim S. 487P Real-world feasibility of adjuvant TAC with pegylated G-CSF in resectable breast cancer: A single-center experience. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw595.003] [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] [Indexed: 11/14/2022] Open
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Lee HR, Gupta MK, Kim DH, Hwang JH, Kwon B, Lee HT. Poly(ADP-ribosyl)ation is involved in pro-survival autophagy in porcine blastocysts. Mol Reprod Dev 2015; 83:37-49. [PMID: 26440043 DOI: 10.1002/mrd.22588] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Accepted: 10/02/2015] [Indexed: 12/31/2022]
Abstract
Poly(ADP-ribosyl)ation (PARylation) prevents apoptosis through its involvement in pro-survival autophagy in cultured cells; whether or not the same is true for pre-implantation embryos has not yet been documented. In this study, we investigated the participation of PARylation and autophagy in in vitro porcine pre-implantation embryo development. The transcript levels of autophagy-related genes and poly(ADP-ribose) polymerase 1 (PARP1), an enzyme required for PARylation, were transiently up-regulated by fertilization, decreased at the late 1-cell stage, and maintained until the blastocyst stage. LC3, a marker of autophagosomes, and poly(ADP-ribose) (PAR) polymer were present in all stages of pre-implantation development. Exposure of embryos to 3-methyladenine, an autophagy inhibitor, or 3-aminobenzamide, a PARP inhibitor, suppressed the development of blastocysts. Pharmacological inhibition of PARylation further suppressed pro-survival autophagy by decreasing the expression of autophagy-related genes (ATG5, BECLIN1, and LC3) and decreasing LC3 protein abundance while increasing the rate of apoptosis in blastocysts. Deficiency in autophagy also induced abnormal accumulation of SQSTM1/p62 aggregates in porcine blastocysts. Collectively, these data suggest that PARylation is involved in selective autophagic degradation of ubiquitinated proteins, functioning in a pro-survival role, in porcine in vitro-produced embryos. These pro-survival regulatory mechanisms may be important for the control of embryo quality.
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Affiliation(s)
- Hye Ran Lee
- Department of Animal Biotechnology, Bio-Organ Research Center/Animal Resources Research Center, Konkuk University, Seoul, South Korea
| | - Mukesh Kumar Gupta
- Department of Biotechnology and Medical Engineering, National Institute of Technology, Rourkela, Odisha, India
| | - Duk Hyeon Kim
- Department of Animal Biotechnology, Bio-Organ Research Center/Animal Resources Research Center, Konkuk University, Seoul, South Korea
| | - Jeong Ho Hwang
- Department of Animal Biotechnology, Bio-Organ Research Center/Animal Resources Research Center, Konkuk University, Seoul, South Korea
| | - Bumsup Kwon
- Department of Animal Biotechnology, Bio-Organ Research Center/Animal Resources Research Center, Konkuk University, Seoul, South Korea
| | - Hoon Taek Lee
- Department of Animal Biotechnology, Bio-Organ Research Center/Animal Resources Research Center, Konkuk University, Seoul, South Korea
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Rajamuthiah R, Jayamani E, Majed H, Conery AL, Kim W, Kwon B, Fuchs BB, Kelso MJ, Ausubel FM, Mylonakis E. Antibacterial properties of 3-(phenylsulfonyl)-2-pyrazinecarbonitrile. Bioorg Med Chem Lett 2015; 25:5203-7. [PMID: 26459212 DOI: 10.1016/j.bmcl.2015.09.066] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 09/23/2015] [Accepted: 09/28/2015] [Indexed: 11/30/2022]
Abstract
The emergence of multidrug-resistant bacterial strains has heightened the need for new antimicrobial agents based on novel chemical scaffolds that are able to circumvent current modes of resistance. We recently developed a whole-animal drug-screening methodology in pursuit of this goal and now report the discovery of 3-(phenylsulfonyl)-2-pyrazinecarbonitrile (PSPC) as a novel antibacterial effective against resistant nosocomial pathogens. The minimum inhibitory concentrations (MIC) of PSPC against Staphylococcus aureus and Enterococcus faecium were 4 μg/mL and 8 μg/mL, respectively, whereas the MICs were higher against the Gram-negative bacteria Klebsiella pneumoniae (64 μg/mL), Acinetobacter baumannii (32 μg/mL), Pseudomonas aeruginosa (>64 μg/mL), and Enterobacter spp. (>64 μg/mL). However, co-treatment of PSPC with the efflux pump inhibitor phenylalanine arginyl β-naphthylamide (PAβN) or with sub-inhibitory concentrations of the lipopeptide antibiotic polymyxin B reduced the MICs of PSPC against the Gram-negative strains by >4-fold. A sulfide analog of PSPC (PSPC-1S) showed no antibacterial activity, whereas the sulfoxide analog (PSPC-6S) showed identical activity as PSPC across all strains, confirming structure-dependent activity for PSPC and suggesting a target-based mechanism of action. PSPC displayed dose dependent toxicity to both Caenorhabditis elegans and HEK-293 mammalian cells, culminating with a survival rate of 16% (100 μg/mL) and 8.5% (64 μg/mL), respectively, at the maximum tested concentration. However, PSPC did not result in hemolysis of erythrocytes, even at a concentration of 64 μg/mL. Together these results support PSPC as a new chemotype suitable for further development of new antibiotics against Gram-positive and Gram-negative bacteria.
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Affiliation(s)
- Rajmohan Rajamuthiah
- Division of Infectious Diseases, Rhode Island Hospital, Alpert Medical School of Brown University, POB, 3rd Floor, Suite 328/330, 593 Eddy Street, Providence, RI 02903, USA; Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Elamparithi Jayamani
- Division of Infectious Diseases, Rhode Island Hospital, Alpert Medical School of Brown University, POB, 3rd Floor, Suite 328/330, 593 Eddy Street, Providence, RI 02903, USA; Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Hiwa Majed
- Illawarra Health and Medical Research Institute, University of Wollongong, Wollongong, NSW 2522, Australia; School of Chemistry, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Annie L Conery
- Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Wooseong Kim
- Division of Infectious Diseases, Rhode Island Hospital, Alpert Medical School of Brown University, POB, 3rd Floor, Suite 328/330, 593 Eddy Street, Providence, RI 02903, USA
| | - Bumsup Kwon
- Division of Neurology, Rhode Island Hospital, Alpert Medical School of Brown University, Providence, RI 02903, USA
| | - Beth Burgwyn Fuchs
- Division of Infectious Diseases, Rhode Island Hospital, Alpert Medical School of Brown University, POB, 3rd Floor, Suite 328/330, 593 Eddy Street, Providence, RI 02903, USA
| | - Michael J Kelso
- Illawarra Health and Medical Research Institute, University of Wollongong, Wollongong, NSW 2522, Australia; School of Chemistry, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Frederick M Ausubel
- Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Eleftherios Mylonakis
- Division of Infectious Diseases, Rhode Island Hospital, Alpert Medical School of Brown University, POB, 3rd Floor, Suite 328/330, 593 Eddy Street, Providence, RI 02903, USA; Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA.
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Kwon B, Gamache T, Lee HK, Querfurth HW. Synergistic effects of β-amyloid and ceramide-induced insulin resistance on mitochondrial metabolism in neuronal cells. Biochim Biophys Acta Mol Basis Dis 2015; 1852:1810-23. [DOI: 10.1016/j.bbadis.2015.05.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Revised: 05/18/2015] [Accepted: 05/19/2015] [Indexed: 12/16/2022]
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Rajamuthiah R, Fuchs BB, Conery AL, Kim W, Jayamani E, Kwon B, Ausubel FM, Mylonakis E. Repurposing salicylanilide anthelmintic drugs to combat drug resistant Staphylococcus aureus. PLoS One 2015; 10:e0124595. [PMID: 25897961 PMCID: PMC4405337 DOI: 10.1371/journal.pone.0124595] [Citation(s) in RCA: 109] [Impact Index Per Article: 12.1] [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: 12/21/2014] [Accepted: 03/16/2015] [Indexed: 01/10/2023] Open
Abstract
Staphylococcus aureus is a Gram-positive bacterium that has become the leading cause of hospital acquired infections in the US. Repurposing Food and Drug Administration (FDA) approved drugs for antimicrobial therapy involves lower risks and costs compared to de novo development of novel antimicrobial agents. In this study, we examined the antimicrobial properties of two commercially available anthelmintic drugs. The FDA approved drug niclosamide and the veterinary drug oxyclozanide displayed strong in vivo and in vitro activity against methicillin resistant S. aureus (minimum inhibitory concentration (MIC): 0.125 and 0.5 μg/ml respectively; minimum effective concentration: ≤ 0.78 μg/ml for both drugs). The two drugs were also effective against another Gram-positive bacteria Enterococcus faecium (MIC 0.25 and 2 μg/ml respectively), but not against the Gram-negative species Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa and Enterobacter aerogenes. The in vitro antimicrobial activity of niclosamide and oxyclozanide were determined against methicillin, vancomycin, linezolid or daptomycin resistant S. aureus clinical isolates, with MICs at 0.0625-0.5 and 0.125-2 μg/ml for niclosamide and oxyclozanide respectively. A time-kill study demonstrated that niclosamide is bacteriostatic, whereas oxyclozanide is bactericidal. Interestingly, oxyclozanide permeabilized the bacterial membrane but neither of the anthelmintic drugs exhibited demonstrable toxicity to sheep erythrocytes. Oxyclozanide was non-toxic to HepG2 human liver carcinoma cells within the range of its in vitro MICs but niclosamide displayed toxicity even at low concentrations. These data show that the salicylanilide anthelmintic drugs niclosamide and oxyclozanide are suitable candidates for mechanism of action studies and further clinical evaluation for treatment of staphylococcal infections.
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Affiliation(s)
- Rajmohan Rajamuthiah
- Division of Infectious Diseases, Rhode Island Hospital, Alpert Medical School of Brown University, Providence, Rhode Island, United States of America
- Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Beth Burgwyn Fuchs
- Division of Infectious Diseases, Rhode Island Hospital, Alpert Medical School of Brown University, Providence, Rhode Island, United States of America
| | - Annie L. Conery
- Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Wooseong Kim
- Division of Infectious Diseases, Rhode Island Hospital, Alpert Medical School of Brown University, Providence, Rhode Island, United States of America
| | - Elamparithi Jayamani
- Division of Infectious Diseases, Rhode Island Hospital, Alpert Medical School of Brown University, Providence, Rhode Island, United States of America
- Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Bumsup Kwon
- Division of Neurology, Rhode Island Hospital, Alpert Medical School of Brown University, Providence, Rhode Island, United States of America
| | - Frederick M. Ausubel
- Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Eleftherios Mylonakis
- Division of Infectious Diseases, Rhode Island Hospital, Alpert Medical School of Brown University, Providence, Rhode Island, United States of America
- Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
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Domingos J, Augustine D, Leeson P, Noble J, Doan HL, Boubrit L, Cheikh-Khalifa R, Laveau F, Djebbar M, Pousset F, Isnard R, Hammoudi N, Lisi M, Cameli M, Di Tommaso C, Curci V, Reccia R, Maccherini M, Henein MY, Mondillo S, Leitman M, Vered Z, Rashid H, Yalcin MU, Gurses KM, Kocyigit D, Evranos B, Yorgun H, Sahiner L, Kaya B, Aytemir K, Ozer N, Bertella E, Petulla' M, Baggiano A, Mushtaq S, Russo E, Gripari P, Innocenti E, Andreini D, Tondo C, Pontone G, Necas J, Kovalova S, Hristova K, Shiue I, Bogdanva V, Teixido Tura G, Sanchez V, Rodriguez-Palomares J, Gutierrez L, Gonzalez-Alujas T, Garcia-Dorado D, Forteza A, Evangelista A, Timoteo AT, Aguiar Rosa S, Cruz Ferreira R, Campbell R, Carrick D, Mccombe C, Tzemos N, Berry C, Sonecki P, Noda M, Setoguchi M, Ikenouchi T, Nakamura T, Yamamoto Y, Murakami T, Katou Y, Usui M, Ichikawa K, Isobe M, Kwon B, Roh J, Kim H, Ihm S, Barron AJ, Francis D, Mayet J, Wensel R, Kosiuk J, Dinov B, Bollmann A, Hindricks G, Breithardt O, Rio P, Moura Branco L, Galrinho A, Cacela D, Pinto Teixeira P, Afonso Nogueira M, Pereira-Da-Silva T, Abreu J, Teresa Timoteo A, Cruz Ferreira R, Pavlyukova E, Tereshenkova E, Karpov R, Piatkowski R, Kochanowski J, Opolski G, Barbier P, Mirea O, Guglielmo M, Savioli G, Cefalu C, Pudil R, Horakova L, Rozloznik M, Balestra C, Rimbas R, Enescu O, Calin S, Vinereanu D, Karsenty C, Hascoet S, Hadeed K, Semet F, Dulac Y, Alacoque X, Leobon B, Acar P, Dharma S, Sukmawan R, Soesanto A, Vebiona K, Firdaus I, Danny S, Driessen MMP, Sieswerda G, Post M, Snijder R, Van Dijk A, Leiner T, Meijboom F, Chrysohoou C, Tsitsinakis G, Tsiachris D, Aggelis A, Herouvim E, Vogiatzis I, Pitsavos C, Koulouris G, Stefanadis C, Erdei T, Edwards J, Braim D, Yousef Z, Fraser A, Avenatti E, Magnino C, Omede' P, Presutti D, Moretti C, Iannaccone A, Ravera A, Gaita F, Milan A, Veglio F, Barbier P, Scali M, Simioniuc A, Guglielmo M, Savioli G, Cefalu C, Mirea O, Fusini L, Dini F, Okura H, Murata E, Kataoka T, Zaroui A, Ben Halima M, Mourali M, Mechmeche R, Rodriguez Palomares JF, Gutierrez L, Maldonado G, Garcia G, Otaegui I, Garcia Del Blanco B, Teixido G, Gonzalez Alujas M, Evangelista A, Garcia Dorado D, Godinho AR, Correia A, Rangel I, Rocha A, Rodrigues J, Araujo V, Almeida P, Macedo F, Maciel M, Rekik B, Mghaieth F, Aloui H, Boudiche S, Jomaa M, Ayari J, Tabebi N, Farhati A, Mourali S, Dekleva M, Markovic-Nikolic N, Zivkovic M, Stankovic A, Boljevic D, Korac N, Beleslin B, Arandjelovic A, Ostojic M, Galli E, Guirette Y, Auffret V, Daudin M, Fournet M, Mabo P, Donal E, Chin CWL, Luo E, Hwan J, White A, Newby D, Dweck M, Carstensen HG, Larsen LH, Hassager C, Kofoed KF, Jensen JS, Mogelvang R, Kowalczyk M, Debska M, Kolesnik A, Dangel J, Kawalec W, Migliore R, Adaniya M, Barranco M, Miramont G, Gonzalez S, Tamagusuku H, Davidsen ES, Kuiper KKJ, Matre K, Gerdts E, Igual Munoz B, Maceira Gonzalez A, Erdociain Perales M, Estornell Erill J, Valera Martinez F, Miro Palau V, Piquer Gil M, Sepulveda Sanchez P, Cervera Zamora A, Montero Argudo A, Placido R, Silva Marques J, Magalhaes A, Guimaraes T, Nobre E Menezes M, Goncalves S, Ramalho A, Robalo Martins S, Almeida A, Nunes Diogo A, Abid L, Ben Kahla S, Charfeddine S, Abid D, Kammoun S, Tounsi A, Abid L, Abid D, Charfeddine S, Hammami R, Triki F, Akrout M, Mallek S, Hentati M, Kammoun S, Sirbu CF, Berrebi A, Huber A, Folliguet T, Yang LT, Shih J, Liu Y, Li Y, Tsai L, Luo C, Tsai W, Babukov R, Bartosh F, Bazilev V, Muraru D, Cavalli G, Addetia K, Miglioranza M, Veronesi F, Mihaila S, Tadic M, Cucchini U, Badano L, Lang R, Miyazaki S, Slavich M, Miyazaki T, Figini F, Lativ A, Chieffo A, Montrfano M, Alfieri O, Colombo A, Agricola E, Liu D, Hu K, Herrmann S, Stoerk S, Kramer B, Ertl G, Bijnens B, Weidemann F, Brand M, Butz T, Tzikas S, Van Bracht M, Roeing J, Wennemann R, Christ M, Grett M, Trappe HJ, Scherzer S, Geroldinger A, Krenn L, Roth C, Gangl C, Maurer G, Rosenhek R, Neunteufl T, Binder T, Bergler-Klein J, Martins E, Pinho T, Leite S, Azevedo O, Belo A, Campelo M, Amorim S, Rocha-Goncalves F, Goncalves L, Silva-Cardoso J, Ahn H, Kim K, Jeon H, Youn H, Haland T, Saberniak J, Leren I, Edvardsen T, Haugaa K, Ziolkowska L, Boruc A, Kowalczyk M, Turska-Kmiec A, Zubrzycka M, Kawalec W, Monivas Palomero V, Mingo Santos S, Goirigolzarri Artaza J, Rodriguez Gonzalez E, Rivero Arribas B, Castro Urda V, Dominguez Rodriguez F, Mitroi C, Gracia Lunar I, Fernadez Lozano I, Palecek T, Masek M, Kuchynka P, Fikrle M, Spicka I, Rysava R, Linhart A, Saberniak J, Hasselberg N, Leren I, Haland T, Borgquist R, Platonov P, Edvardsen T, Haugaa K, Ancona R, Comenale Pinto S, Caso P, Coopola M, Arenga F, Rapisarda O, D'onofrio A, Sellitto V, Calabro R, Rosca M, Popescu B, Calin A, Mateescu A, Beladan C, Jalba M, Rusu E, Zilisteanu D, Ginghina C, Pressman G, Cepeda-Valery B, Romero-Corral A, Moldovan R, Saenz A, Orban M, Samuel S, Fijalkowski M, Fijalkowska M, Gilis-Siek N, Blaut K, Galaska R, Sworczak K, Gruchala M, Fijalkowski M, Nowak R, Gilis-Siek N, Fijalkowska M, Galaska R, Gruchala M, Ikonomidis I, Triantafyllidi H, Trivilou P, Tzortzis S, Papadopoulos C, Pavlidis G, Paraskevaidis I, Lekakis J, Kaymaz C, Aktemur T, Poci N, Ozturk S, Akbal O, Yilmaz F, Tokgoz Demircan H, Kirca N, Tanboga I, Ozdemir N, Greiner S, Jud A, Aurich M, Hess A, Hilbel T, Hardt S, Katus H, D'ascenzi F, Cameli M, Alvino F, Lisi M, Focardi M, Solari M, Bonifazi M, Mondillo S, Konopka M, Krol W, Klusiewicz A, Burkhard K, Chwalbinska J, Pokrywka A, Dluzniewski M, Braksator W, King GJ, Coen K, Gannon S, Fahy N, Kindler H, Clarke J, Iliuta L, Rac-Albu M, Placido R, Robalo Martins S, Guimaraes T, Nobre E Menezes M, Cortez-Dias N, Francisco A, Silva G, Goncalves S, Almeida A, Nunes Diogo A, Kyu K, Kong W, Songco G, Galupo M, Castro M, Shin Hnin W, Ronald Lee C, Poh K, Milazzo V, Di Stefano C, Tosello F, Leone D, Ravera A, Sabia L, Sobrero G, Maule S, Veglio F, Milan A, Jamiel AM, Ahmed AM, Farah I, Al-Mallah MH, Petroni R, Magnano R, Bencivenga S, Di Mauro M, Petroni S, Altorio S, Romano S, Penco M, Kumor M, Lipczynska M, Klisiewicz A, Wojcik A, Konka M, Kozuch K, Szymanski P, Hoffman P, Rimbas R, Rimbas M, Enescu O, Mihaila S, Calin S, Vinereanu D, Donal E, Reynaud A, Lund L, Persson H, Hage C, Oger E, Linde C, Daubert J, Maria Oliveira Lima M, Costa H, Gomes Da Silva M, Noman Alencar M, Carmo Pereira Nunes M, Costa Rocha M, Abid L, Charfeddine S, Ben Kahla S, Abid D, Siala A, Hentati M, Kammoun S, Kovalova S, Necas J, Ozawa K, Funabashi N, Takaoka H, Kobayashi Y, Matsumura Y, Wada M, Hirakawa D, Yasuoka Y, Morimoto N, Takeuchi H, Kitaoka H, Sugiura T, Lakkas L, Naka K, Ntounousi E, Gkirdis I, Koutlas V, Bechlioulis A, Pappas K, Katsouras C, Siamopoulos K, Michalis L, Naka K, Evangelou D, Kalaitzidis R, Bechlioulis A, Lakkas L, Gkirdis I, Tzeltzes G, Nakas G, Katsouras C, Michalis L, Generati G, Bandera F, Pellegrino M, Labate V, Alfonzetti E, Guazzi M, Zagatina A, Zhuravskaya N, Al-Mallah M, Alsaileek A, Qureshi W, Karsenty C, Hascoet S, Peyre M, Hadeed K, Alacoque X, Amadieu R, Leobon B, Dulac Y, Acar P, Yamanaka Y, Sotomi Y, Iwakura K, Inoue K, Toyoshima Y, Tanaka K, Oka T, Tanaka N, Orihara Y, Fujii K, Soulat-Dufour L, Lang S, Boyer-Chatenet L, Van Der Vynckt C, Ederhy S, Adavane S, Haddour N, Boccara F, Cohen A, Huitema M, Boerman S, Vorselaars V, Grutters J, Post M, Gopal AS, Saha S, Toole R, Kiotsekoglou A, Cao J, Reichek N, Meyer CG, Altiok E, Al Ateah G, Lehrke M, Becker M, Lotfi S, Autschbach R, Marx N, Hoffmann R, Frick M, Nemes A, Sepp R, Kalapos A, Domsik P, Forster T, Caro Codon J, Blazquez Bermejo Z, Lopez Fernandez T, Valbuena Lopez SC, Iniesta Manjavacas AM, De Torres Alba F, Dominguez Melcon F, Pena Conde L, Moreno Yanguela M, Lopez-Sendon JL, Nemes A, Lengyel C, Domsik P, Kalapos A, Orosz A, Varkonyi T, Forster T, Rendon J, Saldarriaga CI, Duarte N, Nemes A, Domsik P, Kalapos A, Forster T, Nemes A, Domsik P, Kalapos A, Sepp R, Foldeak D, Borbenyi Z, Forster T, Hamdy A, Fereig H, Nabih M, Abdel-Aziz A, Ali A, Broyd C, Wielandts JY, De Buck S, Michielsen K, Louw R, Garweg C, Nuyts J, Ector J, Maes F, Heidbuchel H, Gillis K, Bala G, Tierens S, Cosyns B, Maurovich-Horvat P, Horvath T, Jermendy A, Celeng C, Panajotu A, Bartykowszki A, Karolyi M, Tarnoki A, Jermendy G, Merkely B. Poster session 2: Thursday 4 December 2014, 08:30-12:30 * Location: Poster area. Eur Heart J Cardiovasc Imaging 2014. [DOI: 10.1093/ehjci/jeu252] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Kwon B, Roh J, Kim H, Ihm S. LEFT VENTRICULAR DIASTOLIC DYSSYNCHRONY IN PATIENTS WITH TREATMENT-NAÏVE HYPERTENSION AND THE EFFECTS OF ANTIHYPERTENSIVE THERAPY. Can J Cardiol 2014. [DOI: 10.1016/j.cjca.2014.07.353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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van West H, Hodgson B, Parent E, Samuel S, Hodgson B, Ferland C, Soroceanu A, Soroceanu A, Protopsaltis T, Protopsaltis T, Radovanovic I, Amritanand R, Shamji M, Haugo K, Malham G, Jarzem P, Rampersaud Y, Tomkins-Lane C, Manson N, Malham G, Rampersaud Y, Malham G, Malham G, King V, Goldstein C, Fisher C, Fehlings M, Fisher C, Wong E, Sardar Z, Christie S, Patel A, Pinkoski C, Ahn H, Drew B, Dvorak M, Pezeshki P, Altaf F, Wilde P, Rampersaud Y, Sparrey C, Tetreault L, Fehlings M, Tetreault L, Rampersaud R, Jack A, Johnstone R, Fernandes A, Urquhart J, Morokoff A, Manson N, Tomkins-Lane C, Phan P, Evaniew N, Shamji M, Manson J, Rampersaud Y, Nault ML, St-Pierre GH, Larouche J, Lewis S, Wilgenbusch C, Lewis S, Rampersaud Y, Johnson R, Cushnie D, Sridharan S, Street J, Gregg C, Missiuna P, Abraham E, Abraham E, Manson N, Huang E, Passmore S, Mac-Thiong JM, Labelle H, Moulin D, Turgeon I, Roy-Beaudry M, Bourassa N, Petit Y, Parent. S, Chabot S, Westover L, Hill D, Moreau M, Hedden D, Lou E, Adeeb. S, Smith M, Bridge C, Hsu B, Gray. R, Group PORSCHES, Saran N, Mac-Thiong JM, Stone L, Ouellet. J, Protopsaltis T, Terran J, Bronsard N, Smith J, Klineberg E, Mundis G, Hostin R, Hart R, Shaffrey C, Bess S, Ames C, Schwab F, Lafage. V, Schwab F, Lafage V, Protopsaltis T, Ames C, Bess S, Smith J, Errico. T, Schwab F, Soroceanu A, Bronsard N, Smith J, Klineberg E, Mundis G, Hostin R, Hart R, Burton D, Ames C, Shaffrey C, Bess S, Errico T, Lafage. V, Terran J, Soroceanu A, Bronsard N, Smith J, Klineberg E, Mundis G, Kim HJ, Hostin R, Hart R, Shaffrey C, Bess S, Ames C, Schwab F, Lafage. V, Urquhart J, Gananapathy V, Siddiqi F, Gurr K, Bailey C, Ravi B, David K, Rampersaud. R, Tu Y, Salter. M, Nichol H, Fourney D, Kelly. M, Parker R, Ellis N, Blecher C, Chow F, Claydon. M, Sardar Z, Alexander D, Oxner W, Plessis SD, Yee A, Wai. E, Lewis S, Davey J, Gandhi R, Mahomed. N, Hu R, Thomas K, Hepler C, Choi K, Rowed K, Haig. A, Lam. K, Parker R, Blecher C, Seex. K, Perruccio A, Gandhi R, Program. UHNA, Ellis N, Parker R, Goss B, Blecher C, Ballok. Z, Parker R, Ellis N, Chan P, Varma. D, Swart A, Winder M, Varga PP, Gokaslan Z, Boriani S, Luzzati A, Rhines L, Fisher C, Chou D, Williams R, Dekutoski M, Quraishi N, Bettegowda C, Kawahara N, Fehlings. M, Versteeg A, Boriani S, Varga PP, Dekutoski M, Luzzati A, Gokaslan Z, Williams R, Reynolds J, Fehlings M, Bettegowda C, Rhines. L, Zamorano J, Nater A, Tetrault L, Varga P, Gokaslan Z, Boriani S, Fisher C, Rhines L, Bettegowda C, Kawahara N, Chou. D, Fehlings M, Kopjar B, Vaccaro A, Arnold P, Schuster J, Finkelstein J, Rhines L, Dekutoski M, Gokaslan Z, France. J, Whyne C, Singh D, Ford. M, Aldebeyan W, Ouellet J, Steffen T, Beckman L, Weber M, Jarzem. P, Kwon B, Ahn H, Bailey C, Fehlings M, Fourney D, Gagnon D, Tsai E, Tsui D, Parent S, Chen J, Dvorak M, Noonan V, Rivers C, Network RHSCIR, Batke J, Lenehan B, Fisher C, Dvorak M, Street. J, Fox R, Nataraj A, Bailey C, Christie S, Duggal N, Fehlings M, Finkelstein J, Fourney D, Hurlbert R, Kwon B, Townson A, Tsai E, Attabib N, Chen J, Dvorak M, Noonan V, Rivers C, Network. RHSCIR, Fehlings M, Paquet J, Ahn H, Attabib N, Bailey C, Christie S, Duggal N, Finkelstein J, Fourney D, Hurlbert R, Johnson M, Kwon B, Parent S, Tsai E, Dvorak M, Noonan V, Rivers C, Shen T, Network. RHSCIR, Fisher C, Kwon B, Drew B, Fehlings M, Paquet J, Ahn H, Attabib N, Bailey C, Christie S, Duggal N, Finkelstein J, Fourney D, Hurlbert R, Johnson M, Mac-Thiong JM, Parent S, Tsai E, Fallah N, Noonan V, Rivers C, Network RHSCIR, Davidson S, McCann C, Akens M, Murphy K, Whyne C, Sherar M, Yee. A, Belanger L, Ronco J, Dea N, Paquette S, Boyd M, Street J, Fisher C, Dvorak M, Kwon B, Gonzalvo A, Fitt G, Liew S, de la Harpe D, Turner P, Rogers M, Bidos A, Fanti C, Young B, Drew B, Puskas. D, Tam H, Manansala S, Nosov V, Delva M, Alshafai N, Kopjar B, Tan G, Arnold P, Fehlings. M, Kopjar B, Arnold P, Ibrahim A, Tetrault. L, Kopjar B, Arnold P, Fehlings. M, Sundararajan K, Eng. S, St-Pierre G, Nataraj A, Urquhart J, Rosas-Arellano P, Tallon C, Gurr K, Siddiqi F, Bailey S, Bailey C, Sundararajan K, Rampersaud. R, Rosa-Arellano P, Tallon C, Bailey S, Gurr K, Bailey. C, Parker R, Milili L, Goss B, Malham. G, Green A, McKeon M, Abraham. E, Lafave L, Parnell J, Rempel J, Moriartey S, Andreas Y, Wilson P, Hepler C, Ray H, Hu. R, Ploumis A, Hess K, Wood. K, Yarascavitch B, Madden K, Ghert M, Drew B, Bhandari M, Kwok D, Tu YS, Salter. M, Hadlow. A, Tso P, Walker K, Lewis S, Davey J, Mahomed N, Coyte. P, Mac-Thiong JM, Roy-Beaudry M, Turgeon I, Labelle H, deGuise J, Parent. S, Jack A, Fox R, Nataraj A, Paquette S, Leroux T, Yee A, Ahn H, Broad R, Fisher C, Hall H, Nataraj A, Hedden D, Christie S, Carey T, Mehta V, Fehlings M, Wadey. V, Dear T, Hashem. M, Fourney D, Goldstein S, Bodrogi A, Lipkus M, Dear T, Keshen S, Veillette C, Gandhi R, Adams D, Briggs N, Davey J, Fehlings M, Lau J, Lewis S, Magtoto R, Marshall K, Massicotte E, Ogilvie-Harris D, Sarro A, Syed K, Mohamed. N, Perera S, Taha A, Urquhart J, Gurr K, Siddiqi F, Bailey C, Thomas K, Cho R, Swamy G, Power C, Henari S, Lenehan. B, McIntosh G, Hall H, Hoffman. C, Karachi A, Pazionis T, AlShaya O, Green A, McKeon M, Manson. N, Green A, McKeon M, Manson. N, Green A, McKeon M, Murray J, Abraham. E, Thomas K, Suttor S, Goyal T, Littlewood J, Bains I, Bouchard J, Hu R, Jacobs B, Cho R, Swamy G, Johnson M, Pelleck V, Amad Y, Ramos E, Glazebrook C. Combined Spine Conference of the Canadian Spine Society New Zealand Orthopaedic Spine Society, Spine Society of Australia: Fairmont Château Lake Louise, Lake, Louise, Alberta, Tuesday, Feb. 25 to Saturday, Mar. 1, 20141.1.01 The use of suspension radiographs to predict LIV tilt.1.1.02 Surgical correction of adolescent idiopathic scoliosis without fusion: an animal model.1.1.03 Are full torso surface topography postural measurements more sensitive to change than back only parameters in adolescents with idiopathic scoliosis and a main thoracic curve?1.2.04 Restoration of thoracic kyphosis in adolescent idiopathic kyphosis: comparative radiographic analysis of round versus rail rods.1.2.05 Scoliosis surgery in spastic quadriplegic cerebral palsy: Is fusion to the pelvis always necessary? A 4–18-year follow-up study.1.2.06 Identification and validation of pain-related biomarkers surrounding spinal surgery in adolescents.1.3.07 Cervical sagittal deformity develops after PJK in adult throacolumbar deformity correction: radiographic analysis using a novel global sagittal angular parameter, the CTPA.1.3.08 Impact of obesity on complications and patient-reported outcomes in adult spinal deformity surgery.1.3.09 The T1 pelvic angle, a novel radiographic measure of sagittal deformity, accounts for both pelvic retroversion and truncal inclination and correlates strongly with HRQOL.1.4.10 Determining cervical sagittal deformity when it is concurrent with thoracolumbar deformity.1.4.11 The influence of sagittal balance and pelvic parameters on the outcome of surgically treated patients with degenerative spondylolisthesis.1.4.12 Predictors of degenerative spondylolisthesis and loading translation in surgical lumbar spinal stenosis patients.2.1.13 Mechanical allodynia following disc herniation requires intraneural macrophage infiltration and can be blocked by systemic selenium delivery or attenuation of BDNF activity.2.1.14 The effect of alanyl-glutamine on epidural fibrosis in a rat laminectomy model.2.1.15 Anterior lumbar interbody fusion using recombinant human bone morphogenetic protein-2: a prospective study of complications.2.2.16 2-year results of a Canadian, multicentre, blinded, pilot study of a novel peptide in promoting lumbar spine fusion.2.2.17 Comparative outcomes and cost-utility following surgical treatment of focal lumbar spinal stenosis compared with osteoarthritis of the hip or knee: long-term change in health-related quality of life.2.2.18 Changes in objectively measured walking performance, function, and pain following surgery for spondylolisthesis and lumbar spinal stenosis.2.3.19 A prospective multicentre observational data-monitored study of minimally invasive fusion to treat degenerative lumbar disorders: complications and outcomes at 1-year follow-up.2.3.20 Assessment and classification of subsidence in lateral interbody fusion using serial computed tomography.2.3.21 Predictors of willingness to undergo spinal and orthopaedic surgery after surgical consultation.2.4.22 Indirect foraminal decompression is independent of facet arthropathy in extreme lateral interbody fusion.2.4.23 Cervical artificial disc replacement with ProDisc-C: clinical and radiographic outcomes with long-term follow-up.2.4.24 Tantalum trabecular metal implants in anterior cervical corpectomy and fusion.3.1.25 Hemangiomas of the spine: results of surgical management and prognostic variables for local recurrence and mortality in a multicentre study.3.1.26 Chondrosarcomas of the spine: prognostic variables for local recurrence and mortality in a multicentre study.3.1.27 Risk factors for recurrence of surgically treated spine schwannomas: analysis of 169 patients from a multicentre international database.3.2.28 Survival pattern and the effect of surgery on health related quality of life and functional outcome in patients with metastatic epidural spinal cord compression from lung cancer — the AOSpine North America prospective multicentre study.3.2.29 A biomechanical assessment of kyphoplasty as a stand-alone treatment in a human cadaveric burst fracture model.3.2.30 What is safer in incompetent vertebrae with posterior wall defects, kyphoplasty or vertebroplasty: a study in vertebral analogs.3.3.31 Feasibility of recruiting subjects for acute spinal cord injury (SCI) clinical trials in Canada.3.3.32 Prospective analysis of adverse events in elderly patients with traumatic spinal cord injury.3.3.33 Does traction before surgery influence time to neural decompression in patients with spinal cord injury?3.4.34 Current treatment of individuals with traumatic spinal cord injury: Do we need age-specific guidelines?3.4.35 Current surgical practice for traumatic spinal cord injury in Canada.3.4.36 The importance of “time to surgery” for traumatic spinal cord injured patients: results from an ambispective Canadian cohort of 949 patients.3.5.37 Assessment of a novel coil-shaped radiofrequency probe in the porcine spine.3.5.38 The effect of norepinephrine and dopamine on cerebrospinal fluid pressure after acute spinal cord injury.3.5.39 The learning curve of pedicle screw placement: How many screws are enough?4.1.40 Preliminary report from the Ontario Inter-professional Spine Assessment and Education Clinics (ISAEC).4.1.41 A surrogate model of the spinal cord complex for simulating bony impingement.4.1.42 Clinical and surgical predictors of specific complications following surgery for the treatment of degenerative cervical myelopathy: results from the multicentre, prospective AOSpine international study on 479 patients.4.2.43 Outcomes of surgical management of cervical spondylotic myelopathy: results of the prospective, multicentre, AOSpine international study in 479 patients.4.2.44 A clinical prediction rule for clinical outcomes in patients undergoing surgery for degenerative cervical myelopathy: analysis of an international AOSpine prospective multicentre data set of 757 subjects.4.2.45 The prevalence and impact of low back and leg pain among aging Canadians: a cross-sectional survey.4.3.46 Adjacent segment pathology: Progressive disease course or a product of iatrogenic fusion?4.3.47 Natural history of degenerative lumbar spondylolisthesis in patients with spinal stenosis.4.3.48 Changes in self-reported clinical status and health care utilization during wait time for surgical spine consultation: a prospective observational study.4.3.49 The Canadian surgical wait list for lumbar degenerative spinal stenosis has a detrimental effect on patient outcomes.4.3.50 Segmental lordosis is independent of interbody cage position in XLIF.4.3.51 Elevated patient BMI does not negatively affect self-reported outcomes of thoracolumbar surgery.1.5.52 The Spinal Stenosis Pedometer and Nutrition Lifestyle Intervention (SSPANLI): development and pilot.1.5.53 Study evaluating the variability of surgical strategy planning for patients with adult spinal deformity.1.5.54 Atlantoaxial instability in acute odontoid fractures is associated with nonunion and mortality.1.5.55 Peripheral hypersensitivity to subthreshold stimuli persists after resolution of acute experimental disc-herniation neuropathy.1.5.56 Radiation induced lumbar spinal osteonecrosis: case report and literature review.1.5.57 Comparative outcomes and cost-utility following surgical treatment of focal lumbar spinal stenosis compared with osteoarthritis of the hip or knee: Part 2 — estimated lifetime incremental cost-utility ratios.1.5.58 A predictive model of progression for adolescent idiopathic scoliosis based on 3D spine parameters at first visit.1.5.59 Development of a clinical prediction model for surgical decision making in patients with degenerative lumbar spine disease.2.5.60 Canadian spine surgery fellowship education: evaluating opportunity in developing a nationally based training curriculum.2.5.61 Pedicle subtraction osteotomy for severe proximal thoracic junctional kyphosis.2.5.62 A comparison of spine surgery referrals triaged through a multidisciplinary care pathway versus conventional referrals.2.5.63 Results and complications of posterior-based 3 column osteotomies in patients with previously fused spinal deformities.2.5.64 Orthopaedic Surgical AdVerse Event Severity (Ortho-SAVES) system: identifying opportunities for improved patient safety and resource utilization.2.5.65 Spontaneous spinal extra-axial haematomas — surgical experience in Otago and Southland 2011–2013.2.5.66 Obesity and spinal epidural lipomatosis in cauda equina syndrome.2.5.67 Factors affecting restoration of lumbar lordosis in adult degenerative scoliosis patients treated with lateral trans-psoas interbody fusion.3.6.68 Systematic review of complications in spinal surgery: a comparison of retrospective and prospective study design.3.6.69 Postsurgical rehabilitation patients have similar fear avoidance behaviour levels as those in nonoperative care.3.6.70 Outcomes of surgical treatment of adolescent spondyloptosis: a case series.3.6.71 Surgical success in primary versus revision thoracolumbar spine surgery.3.6.72 The effect of smoking on subjective patient outcomes in thoracolumbar surgery.3.6.73 Modelling patient recovery to predict outcomes following elective thoracolumbar surgery for degenerative pathologies.3.6.74 Outcomes from trans-psoas versus open approaches in the treatment of adult degenerative scoliosis.3.6.75 Lumbar spinal stenosis and presurgical assessment: the impact of walking induced strain on a performance-based outcome measure. Can J Surg 2014. [DOI: 10.1503/cjs.005614] [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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Kwon B, Lee HK, Querfurth HW. Oleate prevents palmitate-induced mitochondrial dysfunction, insulin resistance and inflammatory signaling in neuronal cells. Biochim Biophys Acta 2014; 1843:1402-13. [PMID: 24732014 DOI: 10.1016/j.bbamcr.2014.04.004] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [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: 01/31/2014] [Revised: 03/31/2014] [Accepted: 04/04/2014] [Indexed: 01/22/2023]
Abstract
Elevated circulating levels of saturated free fatty acids (sFFAs; e.g. palmitate) are known to provoke inflammatory responses and cause insulin resistance in peripheral tissue. By contrast, mono- or poly-unsaturated FFAs are protective against sFFAs. An excess of sFFAs in the brain circulation may also trigger neuroinflammation and insulin resistance, however the underlying signaling changes have not been clarified in neuronal cells. In the present study, we examined the effects of palmitate on mitochondrial function and viability as well as on intracellular insulin and nuclear factor-κB (NF-κB) signaling pathways in Neuro-2a and primary rat cortical neurons. We next tested whether oleate preconditioning has a protective effect against palmitate-induced toxicity. Palmitate induced both mitochondrial dysfunction and insulin resistance while promoting the phosphorylation of mitogen-activated protein kinases and nuclear translocation of NF-κB p65. Oleate pre-exposure and then removal was sufficient to completely block subsequent palmitate-induced intracellular signaling and metabolic derangements. Oleate also prevented ceramide-induced insulin resistance. Moreover, oleate stimulated ATP while decreasing mitochondrial superoxide productions. The latter were associated with increased levels of peroxisome proliferator-activated receptor-γ coactivator-1α (PGC-1α). Inhibition of protein kinase A (PKA) attenuated the protective effect of oleate against palmitate, implicating PKA in the mechanism of oleate action. Oleate increased triglyceride and blocked palmitate-induced diacylglycerol accumulations. Oleate preconditioning was superior to docosahexaenoic acid (DHA) or linoleate in the protection of neuronal cells against palmitate- or ceramide-induced cytotoxicity. We conclude that oleate has beneficial properties against sFFA and ceramide models of insulin resistance-associated damage to neuronal cells.
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Affiliation(s)
- Bumsup Kwon
- Department of Neurology, Rhode Island Hospital, Warren Alpert Medical School of Brown University, Providence, RI 02903, USA
| | - Han-Kyu Lee
- Department of Neurology, Rhode Island Hospital, Warren Alpert Medical School of Brown University, Providence, RI 02903, USA
| | - Henry W Querfurth
- Department of Neurology, Rhode Island Hospital, Warren Alpert Medical School of Brown University, Providence, RI 02903, USA.
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Kwon B, Kumar P, Lee HK, Zeng L, Walsh K, Fu Q, Barakat A, Querfurth HW. Aberrant cell cycle reentry in human and experimental inclusion body myositis and polymyositis. Hum Mol Genet 2014; 23:3681-94. [PMID: 24556217 DOI: 10.1093/hmg/ddu077] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Inclusion body myositis (IBM), a degenerative and inflammatory disorder of skeletal muscle, and Alzheimer's disease share protein derangements and attrition of postmitotic cells. Overexpression of cyclins and proliferating cell nuclear antigen (PCNA) and evidence for DNA replication is reported in Alzheimer's disease brain, possibly contributing to neuronal death. It is unknown whether aberrant cell cycle reentry also occurs in IBM. We examined cell cycle markers in IBM compared with normal control, polymyositis (PM) and non-inflammatory dystrophy sample sets. Next, we tested for evidence of reentry and DNA synthesis in C2C12 myotubes induced to express β-amyloid (Aβ42). We observed increased levels of Ki-67, PCNA and cyclins E/D1 in IBM compared with normals and non-inflammatory conditions. Interestingly, PM samples displayed similar increases. Satellite cell markers did not correlate with Ki-67-affected myofiber nuclei. DNA synthesis and cell cycle markers were induced in Aβ-bearing myotubes. Cell cycle marker and cyclin protein expressions were also induced in an experimental allergic myositis-like model of PM in mice. Levels of p21 (Cip1/WAF1), a cyclin-dependent kinase inhibitor, were decreased in affected myotubes. However, overexpression of p21 did not rescue cells from Aβ-induced toxicity. This is the first report of cell cycle reentry in human myositis. The absence of rescue and evidence for reentry in separate models of myodegeneration and inflammation suggest that new DNA synthesis may be a reactive response to either or both stressors.
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Affiliation(s)
- Bumsup Kwon
- Department of Neurology, Rhode Island Hospital, Warren Alpert Medical School of Brown University, Providence, RI 02903, USA
| | - Pravir Kumar
- Department of Biotechnology, Delhi Technological University, New Delhi 110042, India
| | - Han-Kyu Lee
- Department of Neurology, Rhode Island Hospital, Warren Alpert Medical School of Brown University, Providence, RI 02903, USA
| | - Ling Zeng
- Molecular Cardiology and Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA 02135, USA
| | - Kenneth Walsh
- Molecular Cardiology and Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA 02135, USA
| | - Qinghao Fu
- Department of Neurology, Caritas St. Elizabeth's Medical Center, Tufts University School of Medicine, Boston, MA 02135, USA
| | - Amey Barakat
- Department of Neurology, Caritas St. Elizabeth's Medical Center, Tufts University School of Medicine, Boston, MA 02135, USA
| | - Henry W Querfurth
- Department of Neurology, Rhode Island Hospital, Warren Alpert Medical School of Brown University, Providence, RI 02903, USA Molecular Cardiology and Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA 02135, USA
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Barrable B, Thorogood N, Noonan V, Joshi P, Stephenson K, Kwon B, Dvorak M. P260 A Model For Bridging The Translational Valley Of Death In Spinal Cord Injury. BMJ Qual Saf 2013. [DOI: 10.1136/bmjqs-2013-002293.227] [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: 11/03/2022]
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Houpt TA, Kwon B, Houpt CE, Neth B, Smith JC. Orientation within a high magnetic field determines swimming direction and laterality of c-Fos induction in mice. Am J Physiol Regul Integr Comp Physiol 2013; 305:R793-803. [PMID: 23720133 DOI: 10.1152/ajpregu.00549.2012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
High-strength static magnetic fields (>7 tesla) perturb the vestibular system causing dizziness, nystagmus, and nausea in humans; and head motion, locomotor circling, conditioned taste aversion, and c-Fos induction in brain stem vestibular nuclei in rodents. To determine the role of head orientation, mice were exposed for 15 min within a 14.1-tesla magnet at six different angles (mice oriented parallel to the field with the head toward B+ at 0°; or pitched rostrally down at 45°, 90°, 90° sideways, 135°, and 180°), followed by a 2-min swimming test. Additional mice were exposed at 0°, 90°, and 180° and processed for c-Fos immunohistochemistry. Magnetic field exposure induced circular swimming that was maximal at 0° and 180° but attenuated at 45° and 135°. Mice exposed at 0° and 45° swam counterclockwise, whereas mice exposed at 135° and 180° swam clockwise. Mice exposed at 90° (with their rostral-caudal axis perpendicular to the magnetic field) did not swim differently than controls. In parallel, exposure at 0° and 180° induced c-Fos in vestibular nuclei with left-right asymmetries that were reversed at 0° vs. 180°. No significant c-Fos was induced after 90° exposure. Thus, the optimal orientation for magnetic field effects is the rostral-caudal axis parallel to the field, such that the horizontal canal and utricle are also parallel to the field. These results have mechanistic implications for modeling magnetic field interactions with the vestibular apparatus of the inner ear (e.g., the model of Roberts et al. of an induced Lorenz force causing horizontal canal cupula deflection).
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Affiliation(s)
- Thomas A Houpt
- Department of Biological Science, Program in Neuroscience, The Florida State University, Tallahassee, Florida; and
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Abstract
Skeletal muscle atrophy can occur rapidly in various fasting, cancerous, systemic inflammatory, deranged metabolic or neurogenic states. The ubiquitin ligase Atrogin-1 (MAFbx) is induced in animal models of these conditions, causing excessive myoprotein degradation. It is unknown if Atrogin upregulation also occurs in acquired human myositis. Intracellular β-amyloid (Aβi), phosphorylated neurofilaments, scattered infiltrates and atrophy involving selective muscle groups characterize human sporadic Inclusion Body Myositis (sIBM). In Polymyositis (PM), inflammation is more pronounced and atrophy is symmetric and proximal. IBM and PM share various inflammatory markers. We found that forkhead family transcription factor Foxo3A is directed to the nucleus and Atrogin-1 transcript is increased in both conditions. Expression of Aβ in transgenic mice and differentiated C2C12 myotubes was sufficient to upregulate Atrogin-1 mRNA and cause atrophy. Aβi reduces levels of p-Akt and downstream p-Foxo3A, resulting in Foxo3A translocation and Atrogin-1 induction. In a mouse model of autoimmune myositis, cellular inflammation alone was associated with similar Foxo3A and Atrogin changes. Thus, either Aβi accumulation or cellular immune stimulation may independently drive muscle atrophy in sIBM and PM, respectively, through pathways converging on Foxo and Atrogin-1. In sIBM it is additionally possible that both mechanisms synergize.
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Affiliation(s)
- Han-Kyu Lee
- Department of Neurology, Rhode Island Hospital, 593 Eddy Street, Providence, RI 02903, USA
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Grabka M, Wita K, Bochenek T, Paraniak-Gieszczyk B, Elzbieciak M, Teixeira R, Moreira N, Soares F, Ribeiro N, Martins R, Elvas L, Providencia L, Duchateau N, Piella G, Doltra A, Silva E, Frangi A, Brugada J, Mont L, Sitges M, De Craene M, Cho E, Choi K, Kwon B, Kim D, Jang S, Park C, Jung H, Jeon H, Youn H, Kim J, Duchateau N, Bijnens B, Doltra A, Gabrielli L, Fernandez-Armenta J, Silva E, Rigol M, Solanes N, Barcelo A, Sitges M, Forsha D, Risum N, Samad Z, Smith P, Rajagopal S, Kropf A, Barker P, Kisslo J, Lindqvist P, Henein M, Soderberg S, Tossavainen E, Gonzalez M, Henein M, Forsha D, Risum N, Smith P, Samad Z, Barker P, Kisslo J, Sidorenko I, Ostrovski U, Shumovech V, Udina O, Freed B, Tsang W, Bhave N, Yamat M, Dill K, Spencer K, Mor-Avi V, Patel A, Gomberg-Maitland M, Lang R. Imaging in dysynchrony and ventricular function: Techniques. Eur Heart J Cardiovasc Imaging 2012. [DOI: 10.1093/ehjci/jes267] [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: 11/12/2022] Open
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Shamji M, Moon ES, Glennie R, Soroceanu A, Lin C, Bailey C, Simmonds A, Fehlings M, Dodwell E, Dold A, El-Hawary R, Hashem M, Dold A, Dold A, Jones S, Bailey C, Karadimas S, Whitehurst D, Norton J, Norton J, Manson N, Kesani A, Bednar D, Lundine K, Hartig D, Fichadi A, Fehlings M, Kim S, Harris S, Lin C, Gill J, Abraham E, Shamji M, Choi S, Goldstein C, Wang Z, McCabe M, Noonan V, Nadeau M, Ferrara S, Kelly A, Melnyk A, Arora D, Quateen A, Dea N, Ranganathan A, Zhang Y, Casha S, Rajamanickam K, Santos A, Santos A, Wilson J, Wilson J, Street J, Wilson J, Lewis R, Noonan V, Street J, El-Hawary R, Egge N, Lin C, Schouten R, Lin C, Kim A, Kwon B, Huang E, Hwang P, Allen K, Jing L, Mata B, Gabr M, Richardson W, Setton L, Karadimas S, Fehlings M, Fleming J, Bailey C, Gurr K, Bailey S, Siddiqi F, Lawendy A, Sanders D, Staudt M, Canacari E, Brown E, Robinson A, McGuire K, Chrysostoum C, Rampersaud YR, Dvorak M, Thomas K, Boyd M, Gurr K, Bailey S, Nadeau M, Fisher C, Batke J, Street J, Boyd M, Dvorak M, Fisher C, Kwon B, Paquette S, Vaccaro A, Chapman J, Arnold P, Shaffrey C, Kopjar B, Snyder B, Wright J, Lewis S, Zeller R, El-Hawary R, Moroz P, Bacon S, Jarzem P, Hedden D, Howard J, Sturm P, Cahill P, Samdani A, Vitale M, Gabos P, Bodin N, d’Amato C, Harris C, Smith J, Parent E, Hill D, Hedden D, Moreau M, Mahood J, Lewis S, Bodrogi A, Abbas H, Goldstein S, Bronstein Y, Bacon S, Chua S, Magana S, Van Houwelingen A, Halpern E, Jhaveri S, Lewis S, Lim A, Leelapattana P, Fleming J, Siddiqqi F, Bailey S, Gurr K, Moon ES, Satkunendrarajah K, Fehlings M, Noonan V, Dvorak M, Bryan S, Aronyk K, Fox R, Nataraj A, Pugh J, Elliott R, McKeon M, Abraham E, Fleming J, Gurr K, Bailey S, Siddiqi F, Bailey C, Davis G, Rogers M, Staples M, Quan G, Batke J, Boyd M, Dvorak M, Fisher C, Kwon B, Paquette S, Street J, Shamji M, Hurlbert R, Jacobs W, Duplessis S, Casha S, Jha N, Hewson S, Massicotte E, Kopjar B, Mortaz S, Coyte P, Rampersaud Y, Rampersaud Y, Goldstein S, Andrew B, Modi H, Magana S, Lewis S, Roffey D, Miles I, Wai E, Manson N, Eastwood D, Elliot R, McKeon M, Bains I, Yong E, Sutherland G, Hurlbert R, Rampersaud Y, Chan V, Persaud O, Koshkin A, Brull R, Hassan N, Petis S, Kowalczuk M, Petrisor B, Drew B, Bhandari M, DiPaola C, Boyd M, Dvorak M, Fisher C, Kwon B, Paquette S, Street J, McLachlin S, Bailey S, Gurr K, Bailey C, Dunning C, Fehlings M, Vaccaro A, Wing P, Itshayek E, Biering-Sorensen F, Dvorak M, McLachlin S, Bailey S, Gurr K, Dunning C, Bailey C, Bradi A, Pokrupa R, Batke J, Boyd M, Dvorak M, Fisher C, Kwon B, Paquette S, Street J, Kelly A, Wen T, Kingwell S, Chak J, Singh V, Cripton P, Fisher C, Dvorak M, Oxland T, Wali Z, Yen D, Alfllouse A, Alzahrani A, Jiang H, Mahood J, Kortbeek F, Fox R, Nataraj A, Street J, Boyd M, Paquette S, Kwon B, Batke J, Dvorak M, Fisher C, Reddy R, Rampersaud R, Hurlbert J, Yong W, Casha S, Zygun D, McGowan D, Bains I, Yong V, Hurlbert R, Mendis B, Chakraborty S, Nguyen T, Tsai E, Chen A, Atkins D, Noonan V, Drew B, Tsui D, Townson A, Dvorak M, Chen A, Atkins D, Noonan V, Drew B, Dvorak M, Craven C, Ford M, Ahn H, Drew B, Fehlings M, Kiss A, Vaccaro A, Harrop J, Grossman R, Frankowski R, Guest J, Dvorak M, Aarabi B, Fehlings M, Noonan V, Cheung A, Sun B, Dvorak M, Vaccaro A, Harrop J, Massicotte E, Dvorak M, Fisher C, Rampersaud R, Lewis S, Fehlings M, Marais L, Noonan V, Queyranne M, Fehlings M, Dvorak M, Atkins D, Hurlbert R, Fox R, Fourney D, Johnson M, Fehlings M, Ahn H, Ford M, Yee A, Finkelstein J, Tsai E, Bailey C, Drew B, Paquet J, Parent S, Christie S, Dvorak M, Noonan V, Cheung A, Sun B, Dvorak M, Sturm P, Cahill P, Samdani A, Vitale M, Gabos P, Bodin N, d’Amato C, Harris C, Smith J, Lange J, DiPaola C, Lapinsky A, Connolly P, Eck J, Rabin D, Zeller R, Lewis S, Lee R, Boyd M, Dvorak M, Fisher C, Kwon B, Paquette S, DiPaola C, Street J, Bodrogi A, Goldstein S, Sofia M, Lewis S, Shin J, Tung K, Ahn H, Lee R, Batke J, Ghag R, Noonan V, Dvorak M, Goyal T, Littlewood J, Bains I, Cho R, Thomas K, Swamy G. Canadian Spine Society abstracts1.1.01 Supraspinal modulation of gait abnormalities associated with noncompressive radiculopathy may be mediated by altered neurotransmitter sensitivity1.1.02 Neuroprotective effects of the sodium-glutamate blocker riluzole in the setting of experimental chronic spondylotic myelopathy1.1.03 The effect of timing to decompression in cauda equina syndrome using a rat model1.2.04 Intraoperative waste in spine surgery: incidence, cost and effectiveness of an educational program1.2.05 Looking beyond the clinical box: the health services impact of surgical adverse events1.2.06 Brace versus no brace for the treatment of thoracolumbar burst fractures without neurologic injury: a multicentre prospective randomized controlled trial1.2.07 Adverse event rates in surgically treated spine injuries without neurologic deficit1.2.08 Functional and quality of life outcomes in geriatric patients with type II odontoid fracture: 1-year results from the AOSpine North America Multi-Center Prospective GOF Study1.3.09 National US practices in pediatric spinal fusion: in-hospital complications, length of stay, mortality, costs and BMP utilization1.3.10 Current trends in the surgical treatment of adolescent idiopathic scoliosis in Canada1.3.11 Sagittal spinopelvic parameters help predict the risk of proximal junctional kyphosis for children treated with posterior distraction-based implants1.4.12 Correlations between changes in surface topography and changes in radiograph measurements from before to 6 months after surgery in adolescents with idiopathic scoliosis1.4.13 High upper instrumented vertebra (UIV) sagittal angle is associated with UIV fracture in adult deformity corrections1.4.14 Correction of adult idiopathic scoliosis using intraoperative skeletal traction1.5.01 Cauda equina: using management protocols to reduce delays in diagnosis1.5.02 Predicting the need for tracheostomy in patients with acute traumatic spinal cord injury1.5.03 A novel animal model of cervical spondylotic myelopathy: an opportunity to identify new therapeutic targets1.5.04 A review of preference-based measures of health-related quality of life in spinal cord injury research1.5.05 Predicting postoperative neuropathic pain following surgery involving nerve root manipulation based on intraoperative electromyographic activity1.5.06 Detecting positional injuries in prone spinal surgery1.5.07 Percutaneous thoracolumbar stabilization for trauma: surgical morbidity, clinical outcomes and revision surgery1.5.08 Systemic inflammatory response syndrome in spinal cord injury patients: Does its presence at admission affect patient outcomes?2.1.15 One hundred years of spine surgery — a review of the evolution of our craft and practice in the spine surgical century [presentation]2.1.16 Prevalence of preoperative MRI findings of adjacent segment disc degeneration in patients undergoing anterior cervical discectomy and fusion2.1.17 Adverse event rates of surgically treated cervical spondylopathic myelopathy2.1.18 Morphometricand dynamic changes in the cervical spine following anterior cervical discectomy and fusion and cervical disc arthroplasty2.1.19 Is surgery for cervical spondylotic myelopathy cost-effective? A cost–utility analysis based on data from the AO Spine North American Prospective Multicentre CSM Study2.2.20 Cost–utility of lumbar decompression with or without fusion for patients with symptomatic degenerative lumbar spondylolisthesis (DLS)2.2.21 Minimally invasive surgery lumbar fusion for low-grade isthmic and degenerative spondylolisthesis: 2- to 5-year follow-up2.2.22 Results and complications of posterior-only reduction and fusion for high-grade spondylolisthesis2.3.23 Fusion versus no fusion in patients with central lumbar spinal stenosis and foraminal stenosis undergoing decompression surgery: comparison of outcomes at baseline and follow-up2.3.24 Two-year results of interspinous spacers (DIAM) as an alternative to arthrodesis for lumbar degenerative disorders2.3.25 Treatment of herniated lumbar disc by sequestrectomy or conventional discectomy2.4.26 No sustained benefit of continuous epidural analgesia for minimally invasive lumbar fusion: a randomized double-blinded placebo controlled study2.4.27 Evidence and current practice in the radiologic assessment of lumbar spine fusion2.4.28 Wiltse versus midline approach for decompression and fusion of the lumbar spine2.5.09 The effect of soft tissue restraints following type II odontoid fractures in the elderly — a biomechanical study2.5.10 Development of an international spinal cord injury (SCI) spinal column injury basic data set2.5.11 Evaluation of instrumentation techniques for a unilateral facet perch and fracture using a validated soft tissue injury model2.5.12 Decreasing neurologic consequences in patients with spinal infection: the testing of a novel diagnostic guideline2.5.13 Prospective analysis of adverse events in surgical treatment of degenerative spondylolisthesis2.5.14 Load transfer characteristics between posterior fusion devices and the lumbar spine under anterior shear loading: an in vitro investigation2.5.15 Preoperative predictive clinical and radiographic factors influencing functional outcome after lumbar discectomy2.5.16 A Thoracolumbar Injury Classification and Severity Score (TLICS) of 4: What should we really do?3.1.29 Adverse events in emergent oncologic spine surgery: a prospective analysis3.1.30 En-bloc resection of primary spinal and paraspinal tumours with critical vascular involvement3.1.31 The treatment impact of minocycline on quantitative MRI in acute spinal cord injury3.1.32 Benefit of minocycline in spinal cord injury — results of a double-blind randomized placebo-controlled study3.2.33 Improvement of magnetic resonance imaging correlation with unilateral motor or sensory deficits using diffusion tensor imaging3.2.34 Comparing care delivery for acute traumatic spinal cord injury in 2 Canadian centres: How do the processes of care differ?3.2.35 Improving access to early surgery: a comparison of 2 centres3.3.36 The effects of early surgical decompression on motor recovery after traumatic spinal cord injury: results of a Canadian multicentre study3.3.37 A clinical prediction model for long-term functional outcome after traumatic spinal cord injury based on acute clinical and imaging factors3.3.38 Effect of motor score on adverse events and quality of life in patients with traumatic spinal cord injury3.4.39 The impact of facet dislocation on neurologic recovery after cervical spinal cord injury: an analysis of data on 325 patients from the Surgical Trial in Acute Spinal Cord Injury Study (STASCIS)3.4.40 Toward a more precise understanding of the epidemiology of traumatic spinal cord injury in Canada3.4.41 Access to care (ACT) for traumatic SCI: a survey of acute Canadian spine centres3.4.42 Use of the Spine Adverse Events Severity (SAVES) instrument for traumatic spinal cord injury3.5.17 Does the type of distraction-based growing system for early onset scoliosis affect postoperative sagittal alignment?3.5.18 Comparison of radiation exposure during thoracolumbar fusion using fluoroscopic guidance versus anatomic placement of pedicle screws3.5.19 Skeletal traction for intraoperative reduction in adolescent idiopathic scoliosis3.5.20 Utility of intraoperative cone-beam computed tomography (O-ARM) and stereotactic navigation in acute spinal trauma surgery3.5.21 Use of a central compression rod to reduce thoracic level spinal osteotomies3.5.22 ICD-10 coding accuracy for spinal cord injured patients3.5.23 Feasibility of patient recruitment in acute SCI trials3.5.24 Treatment of adult degenerative scoliosis with DLIF approaches. Can J Surg 2012. [DOI: 10.1503/cjs.012212] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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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Kwon B, Schulmerich MV, Elgass LJ, Kong R, Holton SE, Bhargava R, King WP. Infrared microspectroscopy combined with conventional atomic force microscopy. Ultramicroscopy 2012; 116:56-61. [PMID: 22537743 DOI: 10.1016/j.ultramic.2012.03.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2011] [Revised: 02/07/2012] [Accepted: 03/01/2012] [Indexed: 11/28/2022]
Abstract
This paper reports nanotopography and mid infrared (IR) microspectroscopic imaging coupled within the same atomic force microscope (AFM). The reported advances are enabled by using a bimaterial microcantilever, conventionally used for standard AFM imaging, as a detector of monochromatic IR light. IR light intensity is recorded as thermomechanical bending of the cantilever measured upon illumination with intensity-modulated, narrowband radiation. The cantilever bending is then correlated with the sample's IR absorption. Spatial resolution was characterized by imaging a USAF 1951 optical resolution target made of SU-8 photoresist. The spatial resolution of the AFM topography measurement was a few nanometers as expected, while the spatial resolution of the IR measurement was 24.4 μm using relatively coarse spectral resolution (25-125 cm(-1)). In addition to well-controlled samples demonstrating the spatial and spectral properties of the setup, we used the method to map engineered skin and three-dimensional cell culture samples. This research combines modest IR imaging capabilities with the exceptional topographical imaging of conventional AFM to provide advantages of both in a facile manner.
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Affiliation(s)
- B Kwon
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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Kwon B, Houpt TA. Mitogen-activated protein kinase in the amygdala plays a critical role in lithium chloride-induced taste aversion learning. Neurobiol Learn Mem 2012; 97:132-9. [PMID: 22085719 PMCID: PMC3532514 DOI: 10.1016/j.nlm.2011.10.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [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: 08/09/2010] [Revised: 10/20/2011] [Accepted: 10/31/2011] [Indexed: 11/28/2022]
Abstract
The intracellular mitogen-activated protein kinase (MAPK) pathway in the brain is necessary for the formation of a variety of memories including conditioned taste aversion (CTA) learning. However, the functional role of MAPK activation in the amygdala during lithium chloride (LiCl)-induced CTA learning has not been established. In the present study, we investigated if local microinjection of SL327, a MAPK kinase inhibitor, into the rat amygdala could alleviate LiCl-induced CTA learning. Our results revealed that acute administration of a high dose of LiCl (0.15M, 12 ml/kg, i.p.) rapidly increased the level of phosphorylated MAPK (pMAPK)-positive cells in the central nucleus of the amygdala (CeA) and nucleus of the solitary tract (NTS) of rats as measured by immunohistochemistry. Local microinjection of SL327 (1 μg/0.5 μl/hemisphere) into the CeA 10 min before LiCl administration decreased both the strength of LiCl-induced CTA paired with 0.125% saccharin and the level of LiCl-induced pMAPK-positive cells in the CeA, but not in the NTS. Our data suggest that the intracellular signaling cascade of the MAPK pathway in the CeA plays a critical role in the processing of visceral information induced by LiCl for CTA learning.
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Affiliation(s)
- Bumsup Kwon
- Department of Biological Science, Program in Neuroscience, Florida State University, Tallahassee, FL 32306-4295, USA
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Luo X, Fang F, Sun J, Xie J, Lee A, Zhang Q, Yu C, Breithardt O, Schiessl S, Schmid M, Seltmann M, Klinghammer L, Zeissler C, Kuechle M, Daniel W, Ege M, Guray U, Guray Y, Demirkan B, Kisacik H, Kim SE, Hong JY, Lee JH, Park DG, Han KR, Oh DJ, Ege M, Demirkan B, Guray U, Guray Y, Tufekcioglu O, Kisacik H, Cozma DC, Mornos C, Ionac A, Petrescu L, Tutuianu C, Dragulescu SI, Guimaraes L, Tavares G, Rodrigues A, Nagamatsu C, Fischer C, Vieira M, Oliveira W, Wilberg T, Cordovil A, Morhy S, Muraru D, Peluso M, Dal Bianco L, Beraldo M, Solda' E, Tuveri M, Cucchini U, Al Mamary A, Badano L, Iliceto S, Pizzuti A, Mabritto B, Derosa C, Tomasello A, Rovere M, Parrini I, Conte M, Lareva N, Govorin A, Cooper R, Sharif J, Somauroo JD, Hung JD, Porcelli V, Skevington R, Shahzad A, Scott S, Lindqvist P, Soderberg S, Gonzalez M, Tossavainen E, Henein M, Nciri N, Saad H, Nawas S, Ali A, Youssufzay A, Safi A, Faruk S, Yurdakul S, Erdemir V, Tayyareci Y, Yildirimturk O, Memic K, Aytekin V, Gurel M, Aytekin S, Przewlocka-Kosmala M, Cielecka-Prynda M, Mysiak A, Kosmala W, Mornos C, Ionac A, Pescariu S, Cozma D, Mornos A, Dragulescu S, Maurea N, Tocchetti CG, Coppola C, Quintavalle C, Rea D, Barbieri A, Piscopo G, Arra C, Condorelli G, Iaffaioli R, Dalen H, Thorstensen A, Moelmen H, Torp H, Stoylen A, Augustine D, Basagiannis C, Suttie J, Cox P, Aitzaz R, Lewandowski A, Lazdam M, Holloway C, Becher H, Leeson P, Radovanovic S, Djokovic A, Todic B, Zdravkovic M, Zaja-Simic M, Banicevic S, Lisulov-Popovic D, Krotin M, Grapsa J, O'regan D, Dawson D, Durighel G, Howard L, Gibbs J, Nihoyannopoulos P, Tulunay Kaya C, Kilickap M, Kurklu H, Ozbek N, Koca C, Kozluca V, Esenboga K, Erol C, Kusmierczyk-Droszcz B, Kowalik E, Niewiadomska J, Hoffman P, Satendra M, Sargento L, Lopes S, Longo S, Lousada N, Palma Reis R, Chillo P, Rieck A, Lwakatare J, Lutale J, Gerdts E, Bonapace S, Molon G, Targher G, Rossi A, Lanzoni L, Canali G, Campopiano E, Zenari L, Bertolini L, Barbieri E, Hristova K, Vladiomirova-Kitova L, Katova T, Nikolov F, Nikolov P, Georgieva S, Simova I, Kostova V, Kuznetsov VA, Krinochkin DV, Chandraratna PA, Pak YA, Zakharova EH, Plusnin AV, Semukhin MV, Gorbatenko EA, Yaroslavskaya EI, Bedetti G, Gargani L, Scalese M, Pizzi C, Sicari R, Picano E, Reali M, Canali E, Cimino S, Francone M, Mancone M, Scardala R, Boccalini F, Hiramoto Y, Frustaci A, Agati L, Savino K, Lilli A, Bordoni E, Riccini C, Ambrosio G, Silva D, Cortez-Dias N, Carrilho-Ferreira P, Jorge C, Silva-Marques J, Magalhaes A, Santos L, Ribeiro S, Pinto F, Nunes Diogo A, Kinova E, Zlatareva N, Goudev A, Bonanad C, Lopez-Lereu M, Monmeneu J, Bodi V, Sanchis J, Nunez J, Chaustre F, Llacer A, Muraru D, Beraldo M, Solda' E, Ermacora D, Cucchini U, Dal Bianco L, Peluso D, Di Lazzari M, Badano L, Iliceto S, Meimoun P, Elmkies F, Benali T, Boulanger J, Zemir H, Clerc J, Luycx-Bore A, Velasco Del Castillo MS, Cacicedo Fernandez De Bobadilla A, Onaindia Gandarias J, Telleria Arrieta M, Zugazabeitia Irazabal G, Quintana Raczka O, Rodriguez Sanchez I, Romero Pereiro A, Laraudogoitia Zaldumbide E, Lekuona Goya I, Bonello B, El Louali E, Fouilloux V, Kammache I, Ovaert C, Kreitmann B, Fraisse A, Migliore R, Adaniya M, Barranco M, Miramont G, Tamagusuku H, Alassar A, Sharma R, Marciniak A, Valencia O, Abdulkareem N, Jahangiri M, Jander N, Kienzle R, Gohlke-Baerwolf C, Gohlke H, Neumann FJ, Minners J, Valbuena S, De Torres F, Lopez T, Gomez JJ, Guzman G, Dominguez F, Refoyo E, Moreno M, Lopez-Sendon JL, Ancona R, Comenale Pinto S, Caso P, Di Salvo G, Severino S, Cavallaro M, Calabro R, Enache R, Muraru D, Piazza R, Roman-Pognuz A, Popescu B, Calin A, Beladan C, Purcarea F, Nicolosi G, Ginghina C, Savu O, Enache R, Popescu B, Calin A, Beladan C, Rosca M, Jurcut R, Serban M, Dorobantu L, Ginghina C, Donal E, Mascle S, Thebault C, Veillard D, Hamonic H, Leguerrier A, Corbineau H, Popa BA, Diena M, Bogdan A, Benea D, Lanzillo G, Casati V, Novelli E, Popa A, Cerin G, Gual Capllonch F, Teis A, Lopez Ayerbe J, Ferrer E, Vallejo N, Gomez Denia E, Bayes Genis A, Spethmann S, Schattke S, Baldenhofer G, Stangl V, Laule M, Baumann G, Stangl K, Knebel F, Labata C, Vallejo N, Gomez Denia E, Garcia Alonso C, Ferrer E, Gual F, Lopez Ayerbe J, Teis A, Nunez Aragon R, Bayes Genis A, Satendra M, Sargento L, Sousa C, Lousada N, Palma Reis R, Vasile AI, Dorobantu M, Iorgulescu C, Bogdan S, Constantinescu D, Caldararu C, Tautu O, Vatasescu R, Badran H, Elnoamany MF, Ayad M, Elshereef A, Farhan A, Nassar Y, Yacoub M, Costabel J, Avegliano G, Elissamburu P, Thierer J, Castro F, Huguet M, Frangi A, Ronderos R, Prinz C, Van Buuren F, Faber L, Bitter T, Bogunovic N, Burchert W, Horstkotte D, Kasprzak JD, Smialowski A, Rudzinski T, Lipiec P, Krzeminska-Pakula M, Wierzbowska-Drabik K, Trzos E, Kurpesa M, Motoki H, Hana M, Marwick T, Allan K, Vazquez-Alvarez M, Medrano Lopez C, Granja Da Silva S, Marcos C, Rodriguez-Ogando A, Alvarez M, Camino M, Centeno M, Maroto E, Feltes Guzman G, Serra Tomas V, Acevedo O, Calli A, Barba M, Pintos G, Valverde V, Zamorano Gomez J, Marchel M, Kochanowski J, Piatkowski R, Madej A, Filipiak K, Hausmanowa-Petrusewicz I, Opolski G, Malev E, Zemtsovsky E, Reeva S, Timofeev E, Pshepiy A, Mihaila S, Rimbas R, Mincu R, Dulgheru R, Mihaila R, Badiu C, Cinteza M, Vinereanu D, Rodrigues A, Guimaraes L, Lira E, Lebihan D, Monaco C, Cordovil A, Oliveira W, Vieira M, Fischer C, Morhy S, Ruiz Ortiz M, Mesa D, Delgado M, Romo E, Pena M, Puentes M, Santisteban M, Lopez Granados A, Arizon Del Prado J, Suarez De Lezo J, Tsai WC, Shih JY, Huang TS, Liu YW, Huang YY, Tsai LM, Cho E, Choi K, Kwon B, Kim D, Jang S, Park C, Jung H, Jeon H, Youn H, Kim J, Rieck AE, Cramariuc D, Lonnebakken M, Lund B, Gerdts E, Moceri P, Doyen D, Cerboni P, Ferrari E, Li W, Silva D, Goncalves S, Ribeiro S, Santos L, Sargento L, Vinhais De Sousa G, Almeida AG, Nunes Diogo A, Hernandez Garcia C, De La Rosa Hernandez A, Arroyo Ucar E, Jorge Perez P, Barragan Acea A, Lacalzada Almeida J, Jimenez Rivera J, Duque Garcia A, Laynez Cerdena I, Arhipov O, Sumin AN, Campens L, Renard M, Trachet B, Segers P, De Paepe A, De Backer J, Purvis JA, Sharma D, Hughes SM, Marek D, Vindis D, Kocianova E, Taborsky M, Yoon H, Kim K, Ahn Y, Chung M, Cho J, Kang J, Rha W, Ozcan O, Sezgin Ozcan D, Candemir B, Aras M, Dincer I, Atak R, Gianturco L, Turiel M, Atzeni F, Tomasoni L, Bruschi E, Epis O, Sarzi-Puttini P, Aggeli C, Poulidakis E, Felekos I, Sideris S, Dilaveris P, Gatzoulis K, Stefanadis C, Wierzbowska-Drabik K, Roszczyk N, Sobczak M, Lipiec P, Peruga J, Krecki R, Kasprzak J, Ishii K, Suyama T, Kataoka K, Furukawa A, Nagai T, Maenaka M, Seino Y, Musca F, De Chiara B, Moreo A, Epis O, Bruschi E, Cataldo S, Parolini M, Parodi O, Bombardini T, Faita F, Picano E, Park SJ, Kil JH, Kim SJ, Jang SY, Chang SA, Choi JO, Lee SC, Park S, Park P, Oh J, Cikes M, Velagic V, Biocina B, Gasparovic H, Djuric Z, Bijnens B, Milicic D, Huqi A, Klas B, He A, Paterson I, Irween M, Ezekovitz J, Choy J, Becher H, Chen Y, Cheng L, Yao R, Yao H, Chen H, Pan C, Shu X, Sobkowicz B, Kaminska M, Musial W, Kaminska M, Sobkowicz B, Musial W, Buechel R, Sommer G, Leibundgut G, Rohner A, Bremerich J, Kaufmann B, Kessel-Schaefer A, Handke M, Kiotsekoglou A, Saha S, Toole R, Sharma S, Gopal A, Adhya S, Tsang W, Kenny C, Kapetanakis S, Lang R, Monaghan M, Smith B, Grapsa J, Dawson D, Coulter T, Rendon A, Cheung WS, Gorissen W, Nihoyannopoulos P, Ejlersen JA, May O, Van Slochteren FJ, Van Der Spoel T, Hanssen H, Doevendans P, Chamuleau S, De Korte C, Tarr A, Stoebe S, Trache T, Kluge JG, Varga A, Hagendorff A, Nagy A, Kovacs A, Apor A, Sax B, Becker D, Merkely B, Lindquist R, Miller A, Reece C, Eidem BW, Choi WG, Kim S, Oh S, Kim Y, Iacobelli R, Chinali M, D' Asaro M, Toscano A, Del Pasqua A, Esposito C, Seghetti G, Parisi F, Pongiglione G, Rinelli G, Omaygenc O, Bakal R, Dogan C, Teber K, Akpinar S, Sahin G, Ozdemir N, Penhall A, Joseph M, Chong F, De Pasquale C, Selvanayagam J, Leong D, Nyktari EG, Patrianakos AP, Goudis C, Solidakis G, Parthenakis F, Vardas P, Nestaas E, Stoylen A, Fugelseth D, Vitarelli A, Capotosto L, Bernardi M, Conde Y, Caranci F, Placanica G, Dettori O, Vitarelli M, De Chiara S, De Cicco V, Ancona R, Comenale Pinto S, Caso P, Severino S, Cavallaro M, Ferro' M, Calabro' R, Apostolakis S, Chalikias G, Tziakas D, Stakos D, Thomaidi A, Konstantinides S, Vitarelli A, Caranci F, Capotosto L, Iorio G, Rucos R, Continanza G, De Cicco V, D Ascanio M, Alessandroni L, Saponara M, Berry M, Nahum J, Zaghden O, Monin J, Couetil J, Lairez O, Macron L, Dubois Rande J, Gueret P, Lim P, Cameli M, Giacomin E, Lisi M, Benincasa S, Righini F, Menci D, Focardi M, Mondillo S, Bonello B, Fouilloux V, Philip E, Gorincour G, Fraisse A, Bellsham-Revell H, Bell AJ, Miller OI, Beerbaum P, Razavi R, Greil G, Simpson JM, Ann S, Youn H, Jung H, Kim T, Lee J, Chin J, Kim T, Cabeza Lainez P, Escolar Camas V, Gheorghe L, Fernandez Garcia P, Vazquez Garcia R, Gargani L, Caiulo V, Caiulo S, Fisicaro A, Moramarco F, Latini G, Sicari R, Picano E, Seale A, Carvalho J, Gardiner H, Roughton M, Simpson J, Tometzki A, Uzun O, Webber S, Daubeney P, Elnoamany MF, Dawood A, Dwivedi G, Mahadevan G, Jiminez D, Steeds R, Frenneaux M, Attenhofer Jost CH, Knechtle B, Bernheim A, Pfyffer M, Linka A, Faeh-Gunz A, Seifert B, De Pasquale G, Zuber M, Simova I, Hristova K, Georgieva S, Kostova V, Katova T, Tomaszewski A, Kutarski A, Tomaszewski M. Poster Session 2: Thursday 8 December 2011, 14:00-18:00 * Location: Poster Area. European Journal of Echocardiography 2011. [DOI: 10.1093/ejechocard/jer208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Abstract
5-bromo-2-deoxyuridine (BrdU) is often used in studies of adult neurogenesis and olfactory learning, but it can also have toxic effects on highly proliferative tissue. We found that pairing Kool-Aid flavors with acute systemic injections of BrdU induced strong conditioned flavor aversions. Intermittent injections during Kool-Aid-glucose conditioning interfered with learning of a conditioned flavor-nutrient preference. Acute injection of BrdU also elevated plasma corticosterone levels and induced c-Fos in the visceral neuraxis. Thus, acute or intermittent systemic injections of BrdU (50-200 mg/kg) have aversive effects that may interfere with learning.
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Affiliation(s)
- Adam Kimbrough
- Department of Biological Science, Program in Neuroscience, Florida State University, Tallahassee, Florida 32306, USA
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Lee J, Cho Y, Kwon B, Han M. P-021 Endovascular treatment of wide necked intracranial aneurysms using microcatheter protective technique: techniques and outcomes in 71 aneurysms. J Neurointerv Surg 2010. [DOI: 10.1136/jnis.2010.003236.21] [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: 11/04/2022]
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Cason AM, Kwon B, Smith JC, Houpt TA. c-Fos induction by a 14 T magnetic field in visceral and vestibular relays of the female rat brainstem is modulated by estradiol. Brain Res 2010; 1347:48-57. [PMID: 20553875 DOI: 10.1016/j.brainres.2010.06.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2010] [Revised: 05/25/2010] [Accepted: 06/01/2010] [Indexed: 10/19/2022]
Abstract
There is increasing evidence that high magnetic fields interact with the vestibular system of humans and rodents. In rats, exposure to high magnetic fields of 7 T or above induces locomotor circling and leads to a conditioned taste aversion if paired with a novel taste. Sex differences in the behavioral responses to magnetic field exposure have been found, such that female rats show more locomotor circling and enhanced conditioned taste aversion compared to male rats. To determine if estrogen modulates the neural response to high magnetic fields, c-Fos expression after 14 T magnetic field exposure was compared in ovariectomized rats and ovariectomized rats with estradiol replacement. Compared to sham exposure, magnetic field exposure induced significantly more c-Fos positive cells in the nucleus of the solitary tract and the parabrachial, medial vestibular, prepositus, and supragenualis nuclei. Furthermore, there was a significant asymmetry in c-Fos induction between sides of the brainstem in several regions. In ovariectomized rats, there was more c-Fos expressed in the right side compared to left side in the locus coeruleus and parabrachial, superior vestibular, and supragenualis nuclei; less expression in the right compared to left side of the medial vestibular; and no asymmetry in the prepositus nucleus and the nucleus of the solitary tract. Chronic estradiol treatment modulated the neural response in some regions: less c-Fos was induced in the superior vestibular nucleus and locus coeruleus after estradiol replacement; estradiol treatment eliminated the asymmetry of c-Fos expression in the locus coeruleus and supragenualis nucleus, created an asymmetry in the prepositus nucleus and reversed the asymmetry in the parabrachial nucleus. These results suggest that ovarian steroids may mediate sex differences in the behavioral responses to magnetic field exposure at the level of visceral and vestibular nuclei of the brainstem.
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Affiliation(s)
- Angie M Cason
- Department of Biological Science, Program in Neuroscience, The Florida State University, Tallahassee, FL 32306-4295, USA
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Kwon B, Choi Y, Soel Y, Song M, Kim S, Shin H, Chung J, Cho G. Maximum standardized uptake (SUVmax) on initial 18FDG-PET/CT as prognostic value in patients with diffuse large B-cell lymphoma. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.8103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Seol Y, Chung J, Kwon B, Song M, Choi Y, Shin H, Kim S. Treatment for patients with multiple myeloma complicated by renal failure by thalidomide-based regimens. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e13093] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Kwon B, Houpt TA. Phospho-acetylation of histone H3 in the amygdala after acute lithium chloride. Brain Res 2010; 1333:36-47. [PMID: 20346924 DOI: 10.1016/j.brainres.2010.03.068] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2009] [Revised: 03/01/2010] [Accepted: 03/18/2010] [Indexed: 11/17/2022]
Abstract
Acute injection of a high dose of lithium chloride (LiCl) increases c-Fos expression in the central nucleus of the amygdala (CeA). We investigated if LiCl-induced c-Fos expression in the CeA is correlated with histone acetylation and phospho-acetylation. Chromatin modifications such as acetylation and phosphorylation are necessary for optimal gene expression, and gene expression may be increased by inhibiting the activity of histone deacetylases. LiCl (0.15 M, 12 ml/kg, i.p.) highly increased the levels of acetylation and phospho-acetylation of histone H3 in the CeA. The time course of these increases closely corresponded to and preceded the time course of c-Fos induction. Moreover, LiCl-induced c-Fos was co-localized with phospho-acetylated histone H3 in a majority of c-Fos-positive cells in the CeA. Systemic administration of a histone deacetylase inhibitor, sodium butyrate (NaB; 0.3 M, 0.4 g/kg, i.p.), significantly increased the levels of LiCl-induced c-Fos and phospho-acetylated histone H3 in the CeA. NaB also enhanced conditioned taste aversion learning induced by pairing saccharin consumption with LiCl injection, by making the conditioned taste aversion more resistant to extinction. These results suggest that LiCl-induced c-Fos expression may be regulated by modification of histone H3, especially phospho-acetylation, in the CeA. Furthermore, the level of phospho-acetylation of histone H3, c-Fos induction, and amygdalar-dependent taste aversion learning is constrained by endogenous histone deacetylase activity.
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Affiliation(s)
- Bumsup Kwon
- Department of Biological Science and Program in Neuroscience, Florida State University, Tallahassee, FL 32306, USA
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Kim S, Baek N, Kwon B, Kwon Y, Ro J, Park I, Lee E. New HER2 Assay Using Trastuzumab for the Selection of Trastuzumab Responding Breast Cancer: The Positivity Is Significantly Associated with Pathologic Complete Response after Preoperative Chemotherapy. Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-09-6050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background:The evaluation of HER2 status is required for trastuzumab therapy in breast cancer. Although there are a few methods for an evaluation of HER2 status, theoretically the better method would be to check trastuzumab uptake itself in the tumor after trastuzumab administration. Therefore, we developed a different HER2 test (QHerceptest) using trastuzumab to improve an accuracy in the selection of patient for trastuzumab therapy.Patients and Methods:31 patients with HER2 positive (IHC 3+: 19 and IHC 2+ with FISH positive: 12) early breast cancer who were enrolled in a phase II preoperative paclitaxel, gemcitabin and trastuzumab (PGH) combination chemotherapy trial were evaluated. The pre-chemotherapy tumor specimens were obtained from the breast mass (n=24) or metastatic lymph nodes (n=7). After completing 6 cycles of PGH therapy, all patients underwent breast conserving surgery or mastectomy. We applied trastuzumab and Quantum dot conjugated goat anti-human IgG (QD-IgG, 655nm, Invitrogen) in the process of immunuhistochemistry for HER2 using formalin-fixed paraffin embedded specimen. After antigen retrieval, trastuzuamb was applied followed by QD-IgG. The result of QHerceptest was scored as negative, weak positive, moderate positive, or strong positive, and its relative uptake (RU) were quantified by imaging analysis program (Q-IHC, http://www.bio-miblab.org).Results:The uptake of trastuzumab by QHerceptest was heterogenous, varying between 1.3% to 193.7%. Twenty one of 31 (67.7%) patients achieved pathologic complete response (pCR): 11 of 12 patients (91.7%) with QHerceptest strong positive tumors, 6 of 9 patients (66.7%) with QHerceptest moderate positive tumors, and 4 of 7 patients (57.1%) with QHerceptest weak positive tumors, and none of 3 patients (9.4%) with QHerceptest negative tumors (p=0.0203). Besides, RU was significantly different between non-pCR and pCR groups (43.9±38.3, 80.8±47.1, p=0.0396)Conclusion:We developed a new HER2 assay using trastuzumab and applied to clinical specimen. This assay showed heterogenous trastuzumab uptake in this patient population. Although the data need to be verified by further study, the assay could possibly eliminate patients among HER2 positive breast cancer who will not get benefit by trastuzumab .This study was supported by NCC Grant No 0710292-2 and NCC Grant No 0610240.
Citation Information: Cancer Res 2009;69(24 Suppl):Abstract nr 6050.
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Affiliation(s)
- S. Kim
- 1Research Institute and Hospital, National Cancer Center, Korea, Republic of Korea
| | - N. Baek
- 1Research Institute and Hospital, National Cancer Center, Korea, Republic of Korea
| | - B. Kwon
- 1Research Institute and Hospital, National Cancer Center, Korea, Republic of Korea
| | - Y. Kwon
- 1Research Institute and Hospital, National Cancer Center, Korea, Republic of Korea
| | - J. Ro
- 1Research Institute and Hospital, National Cancer Center, Korea, Republic of Korea
| | - I. Park
- 2Seoul National University Hospital, Republic of Korea
| | - E. Lee
- 3Korea University Anam Hospital, Republic of Korea
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Kwon B, Houpt TA. A combined method of laser capture microdissection and X-Gal histology to analyze gene expression in c-Fos-specific neurons. J Neurosci Methods 2009; 186:155-64. [PMID: 19925827 DOI: 10.1016/j.jneumeth.2009.11.011] [Citation(s) in RCA: 6] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2009] [Revised: 11/09/2009] [Accepted: 11/11/2009] [Indexed: 01/28/2023]
Abstract
c-Fos is a member of the activator protein 1 family that regulates transcription of target genes. c-Fos is transiently induced in specific regions of the brain after a variety of external stimuli including learning and memory formation. Analysis of gene expression in c-Fos-expressing cells of the brain may help identify target genes that play important roles in synaptic strength or neuronal morphology. In the present study, we developed a combined method of laser capture microdissection and 5-bromo-4-chloro-3-indoly-beta-D-galactopyranosidase (X-Gal) histology to analyze gene expression in stimulus-induced c-Fos-positive cells. Using transgenic mice carrying a c-fos-lacZ fusion gene, c-Fos-positive cells were easily identified by measuring of beta-galactosidase (beta-Gal) activity. To establish the fidelity of the reporter transgene, the time course of endogenous c-Fos and the c-fos-lacZ transgene expression in the amygdala induced by LiCl administration was investigated by immunohistochemistry and X-Gal staining. LiCl increased the numbers of c-Fos- and beta-Gal-positive cells in the central and basolateral amygdala of the transgenic mice. To ensure that RNA was preserved in X-Gal stained tissue sections, different fixations were examined, with the conclusion that ethanol fixation was best for both RNA preservation and X-Gal staining quality. Finally, in combining X-Gal staining, single-cell LCM and RT-PCR, we confirmed mRNA expression of endogenous c-fos and beta-actin genes in LiCl-induced beta-Gal-positive cells in the CeA, cortex and hippocampus. Combining LCM and transgenic reporter genes provides a powerful tool with which to investigate tissue- or cell-specific gene expression.
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Affiliation(s)
- Bumsup Kwon
- Department of Biological Science and Program in Neuroscience, Florida State University, Tallahassee, FL 32306, USA
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Choi Y, Song M, Seol Y, Kwon B, Shin H, Chung J, Lee J, Lee B, Kim S, Sohn C, Cho G. Use of tumor volume as measured on F18FDG-PET/CT scan as a predictive biomarker for head and neck cancer. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e17019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e17019 Background: Functional imaging, PET and its fusion with anatomical modalities, PET/CT promise to improve detection and characteristic disease. The objective of this study was to evaluate metabolic tumor volume as measured on F-18 FDG-PET/CT and its association with treatment response and prognosis in patients with head and neck cancer. Methods: The study population consisted of patients received neoadjuvant chemotherapy for a maximum of three cycles followed by radiation therapy. Before treatment patients were taken FDG-PET/CT scan, SUVmax, tumor volume, metastasis were recorded. Results: We enrolled 59 patients with stage III ann IV head and neck cancer. The median age was 66 years (range 47–81). There were 32 patients with stage III and 27 with stage IV. The mean SUVmax was 8.8 (range, 1.478). The mean tumor volume was 21.3 cm3 (range, 0.2–170). There was no correlation between tumor volume and SUVmax (correlation coefficient 0.295). Higher SUVmax was not associated with an increased risk of lymph node and distant metastasis at diagnosis (p = 0.968). But higher tumor volume was associated with an increased risk of lymph node and distant metastasis at diagnosis (p = 0.063). The metabolic tumor volume as measured on PET/CT scans was predictor of treatment response and disease -free survival. The response rate were 84% (21/25) for an SUVmax <5.5, 55% (19/34) for an SUVmax > 5.5 (p = 0.038). The disease free survival were 31.1month for an SUVmax <5.5, 4.6months for an SUVmax > 5.5 (p = 0.025). Conclusions: The metabolic tumor volume as measured on F-18FDG-PET/CT is a predictive biomarker of treatment response and disease free survival for patients with head and neck cancer. No significant financial relationships to disclose.
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Affiliation(s)
- Y. Choi
- Pusan National University Hospital, Busan, Republic of Korea; Inje University Busan Paik Hospital, Busan, Republic of Korea
| | - M. Song
- Pusan National University Hospital, Busan, Republic of Korea; Inje University Busan Paik Hospital, Busan, Republic of Korea
| | - Y. Seol
- Pusan National University Hospital, Busan, Republic of Korea; Inje University Busan Paik Hospital, Busan, Republic of Korea
| | - B. Kwon
- Pusan National University Hospital, Busan, Republic of Korea; Inje University Busan Paik Hospital, Busan, Republic of Korea
| | - H. Shin
- Pusan National University Hospital, Busan, Republic of Korea; Inje University Busan Paik Hospital, Busan, Republic of Korea
| | - J. Chung
- Pusan National University Hospital, Busan, Republic of Korea; Inje University Busan Paik Hospital, Busan, Republic of Korea
| | - J. Lee
- Pusan National University Hospital, Busan, Republic of Korea; Inje University Busan Paik Hospital, Busan, Republic of Korea
| | - B. Lee
- Pusan National University Hospital, Busan, Republic of Korea; Inje University Busan Paik Hospital, Busan, Republic of Korea
| | - S. Kim
- Pusan National University Hospital, Busan, Republic of Korea; Inje University Busan Paik Hospital, Busan, Republic of Korea
| | - C. Sohn
- Pusan National University Hospital, Busan, Republic of Korea; Inje University Busan Paik Hospital, Busan, Republic of Korea
| | - G. Cho
- Pusan National University Hospital, Busan, Republic of Korea; Inje University Busan Paik Hospital, Busan, Republic of Korea
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Cason AM, Kwon B, Smith JC, Houpt TA. Labyrinthectomy abolishes the behavioral and neural response of rats to a high-strength static magnetic field. Physiol Behav 2009; 97:36-43. [DOI: 10.1016/j.physbeh.2009.01.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2008] [Revised: 01/22/2009] [Accepted: 01/23/2009] [Indexed: 11/26/2022]
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Rivera HM, Oberbeck DR, Kwon B, Houpt TA, Eckel LA. Estradiol increases Pet-1 and serotonin transporter mRNA in the midbrain raphe nuclei of ovariectomized rats. Brain Res 2009; 1259:51-8. [PMID: 19168037 PMCID: PMC2957819 DOI: 10.1016/j.brainres.2008.12.067] [Citation(s) in RCA: 21] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2008] [Revised: 12/29/2008] [Accepted: 12/31/2008] [Indexed: 01/04/2023]
Abstract
Previous research has shown that estradiol increases the anorexia associated with serotonin (5-HT) neurotransmission. To examine further the putative relationship between estradiol and 5-HT, we investigated whether estradiol increases the expression of Pet-1 and the 5-HT transporter (5-HTT), two genes implicated in the development and regulation of the 5-HT system. Ovariectomized (OVX) rats (n=5-6/group) were treated with 0, 2, or 10 microg estradiol benzoate (EB) in sesame oil on 2 consecutive days. Food intake and body weight were recorded 2 days later when EB-treated rats typically display signs of behavioral estrus (e.g., reduced feeding). Following the collection of behavioral data, rats were perfused, brains were removed, and coronal sections were cut through the midbrain raphe nuclei. Pet-1 and 5-HTT mRNA levels were quantified throughout the dorsal and median raphe nuclei (DRN and MRN) by conducting in situ hybridization on free-floating tissue sections using (35)S-labeled cDNA probes. As expected, EB treatment decreased food intake and body weight on the day that modeled estrus. At this same time, EB treatment increased Pet-1 and 5-HTT mRNA levels within the DRN and MRN. We conclude that a physiologically relevant regimen of estradiol treatment in OVX rats increases Pet-1 and 5-HTT mRNA levels in the midbrain raphe nuclei at a time when the anorexigenic effect of estradiol is apparent. Further studies are required to determine whether the increased expression of Pet-1 and 5-HTT mRNA plays a causal role in the anorexigenic effect of estradiol.
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Affiliation(s)
- Heidi M. Rivera
- Department of Psychology, Florida State University, Tallahassee, FL 32306-4301
| | - Denesa R. Oberbeck
- Department of Biological Science, Florida State University, Tallahassee, FL 32306-4340, USA
| | - Bumsup Kwon
- Department of Biological Science, Florida State University, Tallahassee, FL 32306-4340, USA
| | - Thomas A. Houpt
- Department of Biological Science, Florida State University, Tallahassee, FL 32306-4340, USA
| | - Lisa A. Eckel
- Department of Psychology, Florida State University, Tallahassee, FL 32306-4301
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Park JS, Ha Y, Kwon B, Cho KD, Lee BH, Chae C. Detection of porcine circovirus 2 in mammary and other tissues from experimentally infected sows. J Comp Pathol 2009; 140:208-11. [PMID: 19124134 DOI: 10.1016/j.jcpa.2008.11.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2008] [Revised: 11/07/2008] [Accepted: 11/13/2008] [Indexed: 11/28/2022]
Abstract
The aim of this study was to determine whether porcine circovirus 2 (PCV2) may infect the mammary gland of sows and be shed in the milk. Six pregnant sows were inoculated intranasally with PCV2 three weeks before their expected farrowing date and two further sows acted as uninfected controls. The animals remained clinically healthy and farrowed normally. Milk samples were collected from all sows on the first, second and third days of lactation. PCV2 DNA was detected in the milk of infected sows from day 1 of lactation but not in the milk of uninfected controls. PCV2 antigen and DNA were detected in the mammary gland and other tissues by immunohistochemistry and in-situ hybridization, respectively. Simultaneous detection of viral protein and DNA provided molecular evidence of PCV2 infection and replication within these tissues.
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Affiliation(s)
- J-S Park
- Department of Veterinary Pathology, College of Veterinary Medicine, Seoul National University, San 56-1, Shillim-dong, Gwanak-gu, Seoul 151-742, Republic of Korea
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Lim Y, Kim T, Kwon J, Kim D, Lee S, Kwon B, Hong J, Yun Y. OBOVATOL INHIBITS INTIMAL HYPERPLASIA AFTER CAROTID ARTERY INJURY BY INDUCTION OF P21 PROTEIN. ATHEROSCLEROSIS SUPP 2008. [DOI: 10.1016/s1567-5688(08)70255-1] [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: 11/29/2022]
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Kwon B, Goltz M, Houpt TA. Expression of AP-1 family transcription factors in the amygdala during conditioned taste aversion learning: role for Fra-2. Brain Res 2008; 1207:128-41. [PMID: 18374904 PMCID: PMC2756721 DOI: 10.1016/j.brainres.2008.01.072] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [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: 05/04/2007] [Revised: 01/22/2008] [Accepted: 01/28/2008] [Indexed: 01/08/2023]
Abstract
Conditioned taste aversion (CTA) learning occurs after the pairing of a novel taste with a toxin (e.g. sucrose with LiCl). The immediate early gene c-Fos is necessary for CTA learning, but c-Fos alone cannot be sufficient for consolidation. The expression of other AP-1 proteins from the Fos- and Jun-families may also be required shortly after conditioning for CTA consolidation. To screen for the expression of AP-1 transcription factors within small subregions, RT-PCR analysis was used after laser capture microdissection of the amygdala. Rats were infused intraorally with 5% sucrose (6 ml/6 min) or injected with LiCl (12 ml/kg, 0.15 M, i.p.) or given sucrose paired with LiCl (sucrose/LiCl), or not treated; 1 h later their brains were dissected. The lateral (LA), basolateral (BLA), and central (CeA) subnuclei of the amgydala of single 5 microm sections from individual rats were dissected using the Arcturus PixCell II system. Semi-quantitative RT-PCR showed the consistent presence of c-Fos, Fra-2, c-Jun, and JunD in the amygdala. In situ hybridization confirmed that c-Fos and Fra-2 mRNA expression was increased in the CeA after LiCl and sucrose/LiCl treatment. Immunohistochemistry for Fra-2 revealed high baseline levels of Fra-2 protein in the BLA and CeA, but also an increase in Fra-2 in the BLA and CeA after LiCl and sucrose/LiCl treatment. The similarity of response in LiCl and sucrose/LiCl treated groups might reflect activation by LiCl in both groups. To control for the effects of LiCl, rats were tested in a learned safety experiment. Fra-2 and c-Fos were examined in response to sucrose/LiCl in rats with prior familiarity with sucrose compared to rats without prior exposure to sucrose. The familiar (pre-exposure) group showed a significantly decreased number of Fra-2-positive cells compared with the novel group in the BLA, but not in the CeA. Because pre-exposure to sucrose attenuates CTA learning, a decreased cellular response in pre-exposed rats suggests a specific correlation with CTA learning. Changes in Fra-2 and c-Fos expression in the BLA and CeA at the time of conditioning, together with constitutive expression of c-Jun and JunD, may contribute to CTA learning.
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Affiliation(s)
- Bumsup Kwon
- Department of Biological Science and Program in Neuroscience, The Florida State University, Tallahassee, FL 32306, USA
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Lee S, Lee Y, Kwon S, Kong S, Kwon B, Kwon Y, Min K, Kang H, Ro J, Lee E. High expression of p130Cas/BCAR1 significantly associated with early relapse in hormone receptor positive, axillary node positive breast cancer patients. EJC Suppl 2008. [DOI: 10.1016/s1359-6349(08)70762-6] [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] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Houpt TA, Cassell JA, Riccardi C, Kwon B, Smith JC. Suppression of drinking by exposure to a high-strength static magnetic field. Physiol Behav 2007; 90:59-65. [PMID: 17055009 DOI: 10.1016/j.physbeh.2006.08.027] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2005] [Revised: 08/17/2006] [Accepted: 08/28/2006] [Indexed: 11/16/2022]
Abstract
High-strength static magnetic fields of 7 T and above have been shown to have both immediate and delayed effects on rodents, such as the induction of locomotor circling and the acquisition of conditioned taste aversions. In this study, the acute effects of magnet field exposure on drinking were examined. Exposure to a 14.1-T magnetic field for as little as 5 min significantly decreased the amount of a glucose and saccharin solution (G+S) consumed by water-deprived rats over 10 min. The decreased intake could be accounted for largely, but not entirely, by an increase in the latency of magnet-exposed rats to initiate drinking. When intake was measured for 10-60 min after the initiation of drinking, thus controlling for increased latency, magnet-exposed rats still consumed less G+S than sham-exposed rats. The increased latency was not due simply to an inability of magnet-exposed rats to reach the elevated sipper tube of the G+S bottle, providing rats with long tubes that could be reached without raising their heads normalized intake but latency was still increased. The increased latency and decreased intake appeared to be secondary to somatic effects of magnet exposure, however, because during intraoral infusions magnet-exposed rats consumed the same amount of G+S with the same latency to reject as sham-exposed rats. The suppression of drinking by magnetic field exposure is consistent with the acute effects of other aversive stimuli, such as whole-body rotation, on short-term ingestion. These results add to the evidence that high-static strength magnetic fields can have behavioral effects on rodents.
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Affiliation(s)
- Thomas A Houpt
- Department of Biological Science, The Florida State University, Tallahasse, FL 32306, USA.
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Cho YS, Kwon B, Lee TH, Kim TB, Moon KA, La S, Lee J, Lee SD, Oh YM, Moon HB. 4-1 BB stimulation inhibits allergen-specific immunoglobulin E production and airway hyper-reactivity but partially suppresses bronchial eosinophilic inflammation in a mouse asthma model. Clin Exp Allergy 2006; 36:377-85. [PMID: 16499650 DOI: 10.1111/j.1365-2222.2006.02445.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND 4-1 BB, a member of the tumour necrosis factor receptor superfamily, functions as a co-stimulatory molecule. Recently, stimulation of the 4-1 BB pathway was shown to suppress antigen-specific CD4(+) T cell and subsequent T cell-dependent humoral immune responses. OBJECTIVE We examined the effect of agonistic anti-4-1 BB monoclonal antibody (mAb) treatment on allergic asthma, in which allergen-specific type 2 helper T cells (Th2) have been shown to play an important role. METHODS BALB/c mice were systemically sensitized with intraperitoneal injections of ovalbumin (OVA) and alum on days 0 and 14, and then challenged with inhaled OVA on days 28, 29 and 30. In test groups, the agonistic anti-4-1 BB mAb was administered at the time of initial systemic sensitization with OVA. On day 31, mice were challenged with inhaled methacholine, and enhanced pause was measured as an index of airway hyper-responsiveness (AHR). Levels of OVA-specific IgE in serum, and levels of various cytokines in bronchoalveolar lavage (BAL) fluids were measured. The severity of airway inflammation was determined by differential cell counts in BAL fluids and histopathologic lung analysis. To evaluate local immunity, we cultured lymphocytes from draining perihilar lymph nodes and evaluated the proliferative response to OVA and the levels of IL-5 in the culture supernatant. In addition, the functional mechanism of 4-1 BB stimulation was evaluated in splenocytes obtained at day 7 after systemic OVA sensitization. RESULTS We found that treatment with the anti-4-1 BB mAb significantly decreased AHR and the production of allergen-specific IgE. Bronchial inflammation, however, had only partially improved and the levels of IL-4 and IL-5 in BAL fluids showed only a small degree of reduction compared with the control Ig-treated mice. Thoracic lymphocytes from anti-4-1 BB-treated mice showed significant suppression of OVA-induced proliferation and IL-5 production. In anti-4-1 BB-treated mice, splenocytes exhibited poor proliferation and marked apoptosis 7 days after systemic OVA challenge. CONCLUSION These results suggest that stimulation of the 4-1 BB pathway effectively suppresses some features of allergic asthma, including allergen-specific IgE production and AHR, through deletion of allergen-specific Th2 cells. However, we found that bronchial allergic inflammation was not strictly mediated by suppression of the Th2 immune response in this murine model of asthma. Despite these somewhat contradictory effects, intervention in the 4-1 BB pathway might provide a potential novel immunotherapeutic approach for treatment of allergic asthma.
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Affiliation(s)
- Y S Cho
- Department of Medicine, Division of Allergy and Clinical Immunology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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Houpt TA, Pittman DW, Riccardi C, Cassell JA, Lockwood DR, Barranco JM, Kwon B, Smith JC. Behavioral effects on rats of high strength magnetic fields generated by a resistive electromagnet. Physiol Behav 2005; 86:379-89. [PMID: 16176822 DOI: 10.1016/j.physbeh.2005.08.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
It has been reported previously that exposure to static high magnetic fields of 7 T or above in superconducting magnets has behavioral effects on rats. In particular, magnetic field exposure acutely but transiently suppressed rearing and induced walking in tight circles; the direction of circular locomotion was dependent on the rats' orientation within the magnet. Furthermore, when magnet exposure was paired with consumption of a palatable, novel solution, rats acquired a persistent taste aversion. In order to confirm these results under more controlled conditions, we exposed rats to static magnetic fields of 4 to 19.4 T in a 189 mm bore, 20 T resistive magnet. By using a resistive magnet, field strengths could be arbitrary varied from -19.4 to 19.4 T within the same bore. Rearing was suppressed after exposure to 4 T and above; circling was observed after 7 T and above. Conditioned taste aversion was acquired after 14 T and above. The effects of the magnetic fields were dependent on orientation. Exposure to +14 T induced counter-clockwise circling, while exposure to -14 T induced clockwise circling. Exposure with the rostral-caudal axis of the rat perpendicular to the magnetic field produced an attenuated behavioral response compared to exposure with the rostral-caudal axis parallel to the field. These results in a single resistive magnet confirm and extend our earlier findings using multiple superconducting magnets. They demonstrate that the behavioral effects of exposure within large magnets are dependent on the magnetic field, and not on non-magnetic properties of the machinery. Finally, the effects of exposure to 4 T are clinically relevant, as 4 T magnetic fields are commonly used in functional MRI assays.
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Affiliation(s)
- Thomas A Houpt
- Department of Biological Science, The Florida State University, Tallahassee, FL 32306-4340, USA.
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Kim E, Kim K, Kwon B, Choi S, Sohn M, Kim K. The relationship between fungal sensitization and month of birth distribution in children with allergy. J Allergy Clin Immunol 2005. [DOI: 10.1016/j.jaci.2004.12.403] [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: 11/28/2022]
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Horning MS, Kwon B, Blakemore LJ, Spencer CM, Goltz M, Houpt TA, Trombley PQ. Alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionate receptor subunit expression in rat olfactory bulb. Neurosci Lett 2005; 372:230-4. [PMID: 15542246 DOI: 10.1016/j.neulet.2004.09.044] [Citation(s) in RCA: 8] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2004] [Revised: 09/20/2004] [Accepted: 09/21/2004] [Indexed: 11/16/2022]
Abstract
The alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionate (AMPA) receptors (AMPARs) mediate rapid responses at most central excitatory synapses, including those in the olfactory bulb (OB). These receptors are composed of the glutamate subunits GluR1-4, which each has two splice variant (flip/flop) forms. We recently showed that AMPARs on OB neurons are kinetically and pharmacologically diverse. Here, we explored whether this functional heterogeneity reflects a diverse expression of AMPAR subunits and/or splice variants. Total RNA from rat OBs was amplified by RT-PCR. Digestion of the panGluR PCR product with subunit-specific restriction enzymes revealed that the OB expresses mRNAs for GluR1-4 but in different relative amounts i.e., GluR2 (61 +/- 2.4%), GluR1 (31 +/- 3.5%), GluR4 (6.3 +/- 1.4%), GluR3 (1.4 +/- 0.7%). Furthermore, GluR2 and GluR4 transcripts were composed of similar amounts of flip and flop, whereas GluR1 and GluR3 transcripts consisted mostly of flip. If similar to other brain regions, this heterogeneity in patterns of expression may facilitate information processing.
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Affiliation(s)
- Michelle S Horning
- Department of Biological Science, Program in Neuroscience, Florida State University, Tallahassee, FL 32306-4340, USA
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Cho HR, Kwon B, Yagita H, La S, Lee EA, Kim JE, Akiba H, Kim J, Suh JH, Vinay DS, Ju SA, Kim BS, Mittler RS, Okumura K, Kwon BS. Blockade of 4-1BB (CD137)/4-1BB ligand interactions increases allograft survival. Transpl Int 2004. [DOI: 10.1111/j.1432-2277.2004.tb00454.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Cho HR, Kwon B, Yagita H, La S, Lee EA, Kim JE, Akiba H, Kim J, Suh JH, Vinay DS, Ju SA, Kim BS, Mittler RS, Okumura K, Kwon BS. Blockade of 4-1BB (CD137)/4-1BB ligand interactions increases allograft survival. Transpl Int 2004; 17:351-61. [PMID: 15349720 DOI: 10.1007/s00147-004-0726-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2003] [Revised: 02/12/2004] [Accepted: 03/05/2004] [Indexed: 10/26/2022]
Abstract
We investigated the role of 4-1BB, a T cell co-stimulatory molecule, in alloimmune responses. In vivo mixed lymphocyte reactions showed that 4-1BB was preferentially expressed on actively dividing CD4(+) and CD8(+) T cells. Furthermore, following alloantigen challenge, the draining lymph nodes contained subpopulations of 4-1BB-expressing CD4(+) and CD8(+) T cells. 4-1BB-deficient C57BL/6 mice showed a delayed rejection of cardiac transplants mismatched for the major histocompatibility complex. Longer transplant survival was induced by blockade of 4-1BB/4-1BB ligand (4-1BBL) interactions using an anti-4-1BBL monoclonal antibody. Histological analysis showed that prolonged transplant survival in the 4-1BB-deficient and anti-4-1BBL-treated mice correlated with reduced lymphocytic infiltration and vasculitis in the donor heart tissue. Taken together, our data suggest that blockade of 4-1BB/4-1BBL interactions inhibited the expansion of alloreactive T cells and reduced CTL activity against host alloantigen, which in turn resulted in the prolongation of allograft survival. Blockade of the 4-1BB co-stimulatory pathway may be useful for preventing allograft rejection.
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MESH Headings
- 4-1BB Ligand
- Animals
- Antibodies, Monoclonal/pharmacology
- Antigens, CD
- Cell Division/immunology
- Dendritic Cells/immunology
- Female
- Graft Rejection/immunology
- Graft Rejection/prevention & control
- Graft Survival/immunology
- Heart Transplantation/immunology
- Isoantigens/immunology
- Isoantigens/metabolism
- Lymphocyte Culture Test, Mixed
- Male
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Mice, Inbred DBA
- Mice, Mutant Strains
- Receptors, Nerve Growth Factor/antagonists & inhibitors
- Receptors, Nerve Growth Factor/immunology
- Receptors, Nerve Growth Factor/metabolism
- Receptors, Tumor Necrosis Factor/antagonists & inhibitors
- Receptors, Tumor Necrosis Factor/immunology
- Receptors, Tumor Necrosis Factor/metabolism
- Signal Transduction/immunology
- Skin Transplantation/immunology
- T-Lymphocytes/cytology
- T-Lymphocytes/immunology
- Transplantation, Homologous
- Tumor Necrosis Factor Receptor Superfamily, Member 9
- Tumor Necrosis Factor-alpha/metabolism
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Affiliation(s)
- H R Cho
- Immunomodulation Research Center, University of Ulsan, 682-714, Ulsan, Korea
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