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Shrestha S, Wiener HW, Kajimoto H, Srinivasasainagendra V, Ledee D, Chowdhury S, Cui J, Chen JY, Beckley MA, Padilla LA, Dahdah N, Tiwari HK, Portman MA. Pharmacogenomics of intravenous immunoglobulin response in Kawasaki disease. Front Immunol 2024; 14:1287094. [PMID: 38259468 PMCID: PMC10800400 DOI: 10.3389/fimmu.2023.1287094] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 12/12/2023] [Indexed: 01/24/2024] Open
Abstract
Introduction Kawasaki disease (KD) is a diffuse vasculitis in children. Response to high dose intravenous gamma globulin (IVIG), the primary treatment, varies according to genetic background. We sought to identify genetic loci, which associate with treatment response using whole genome sequencing (WGS). Method We performed WGS in 472 KD patients with 305 IVIG responders and 167 non-responders defined by AHA clinical criteria. We conducted logistic regression models to test additive genetic effect in the entire cohort and in four subgroups defined by ancestry information markers (Whites, African Americans, Asians, and Hispanics). We performed functional mapping and annotation using FUMA to examine genetic variants that are potentially involved IVIG non-response. Further, we conducted SNP-set [Sequence] Kernel Association Test (SKAT) for all rare and common variants. Results Of the 43,288,336 SNPs (23,660,970 in intergenic regions, 16,764,594 in introns and 556,814 in the exons) identified, the top ten hits associated with IVIG non-response were in FANK1, MAP2K3:KCNJ12, CA10, FRG1DP, CWH43 regions. When analyzed separately in ancestry-based racial subgroups, SNPs in several novel genes were associated. A total of 23 possible causal genes were pinpointed by positional and chromatin mapping. SKAT analysis demonstrated association in the entire MANIA2, EDN1, SFMBT2, and PPP2R5E genes and segments of CSMD2, LINC01317, HIVEPI, HSP90AB1, and TTLL11 genes. Conclusions This WGS study identified multiple predominantly novel understudied genes associated with IVIG response. These data can serve to inform regarding pathogenesis of KD, as well as lay ground work for developing treatment response predictors.
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Affiliation(s)
- Sadeep Shrestha
- Department of Epidemiology, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Howard W. Wiener
- Department of Epidemiology, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Hidemi Kajimoto
- Division of Cardiology, Seattle Children’s and University of Washington Department of Pediatrics, Seattle, WA, United States
| | - Vinodh Srinivasasainagendra
- Department of Biostatistics, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Dolena Ledee
- Division of Cardiology, Seattle Children’s and University of Washington Department of Pediatrics, Seattle, WA, United States
| | - Sabrina Chowdhury
- Department of Epidemiology, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Jinhong Cui
- Department of Biostatistics, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Jake Y. Chen
- Informatics Institute, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Mikayla A Beckley
- Division of Cardiology, Seattle Children’s and University of Washington Department of Pediatrics, Seattle, WA, United States
| | - Luz A. Padilla
- Department of Epidemiology, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Nagib Dahdah
- CHU Ste-Justine, Universite de Montreal, Montreal, QC, Canada
| | - Hemant K. Tiwari
- Department of Biostatistics, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Michael A. Portman
- Division of Cardiology, Seattle Children’s and University of Washington Department of Pediatrics, Seattle, WA, United States
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Kajimoto M, Nuri M, Sleasman JR, Charette KA, Kajimoto H, Portman MA. Right ventricular energy metabolism in a porcine model of acute right ventricular pressure overload after weaning from cardiopulmonary bypass. Physiol Rep 2022; 10:e15421. [PMID: 36394073 PMCID: PMC9669618 DOI: 10.14814/phy2.15421] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 07/14/2022] [Accepted: 07/21/2022] [Indexed: 06/16/2023] Open
Abstract
Acute right ventricular pressure overload (RVPO) occurs following congenital heart surgery and often results in low cardiac output syndrome. We tested the hypothesis that the RV exhibits limited ability to modify substrate utilization in response to increasing energy requirements during acute RVPO after cardiopulmonary bypass (CPB). We assessed the RV fractional contributions (Fc) of substrates to the citric acid cycle in juvenile pigs exposed to acute RVPO by pulmonary artery banding (PAB) and CPB. Sixteen Yorkshire male pigs (median 38 days old, 12.2 kg of body weight) were randomized to SHAM (Ctrl, n = 5), 2-h CPB (CPB, n = 5) or CPB with PAB (PAB-CPB, n = 6). Carbon-13 (13 C)-labeled lactate, medium-chain, and mixed long-chain fatty acids (MCFA and LCFAs) were infused as metabolic tracers for energy substrates. After weaning from CPB, RV systolic pressure (RVSP) doubled baseline in PAB-CPB while piglets in CPB group maintained normal RVSP. Fc-LCFAs decreased significantly in order PAB-CPB > CPB > Ctrl groups by 13 C-NMR. Fc-lactate and Fc-MCFA were similar among the three groups. Intragroup analysis for PAB-CPB showed that the limited Fc-LCFAs appeared prominently in piglets exposed to high RVSP-to-left ventricular systolic pressure ratio and high RV rate-pressure product, an indicator of myocardial oxygen demand. Acute RVPO after CPB strongly inhibits LCFA oxidation without compensation by lactate oxidation, resulting in energy deficiency as determined by lower (phosphocreatine)/(adenosine triphosphate) in PAB-CPB. Adequate energy supply but also metabolic interventions may be required to circumvent these RV energy metabolic abnormalities during RVPO after CPB.
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Affiliation(s)
- Masaki Kajimoto
- Center for Integrative Brain ResearchSeattle Children's Research InstituteSeattleWashingtonUSA
| | - Muhammad Nuri
- Division of Cardiothoracic Surgery at Children's Hospital of PhiladelphiaPhiladelphiaPennsylvaniaUSA
| | - Justin R. Sleasman
- Division of Pediatric Cardiac SurgeryLucile Packard Children's HospitalPalo AltoCaliforniaUSA
| | - Kevin A. Charette
- Division of Pediatric Cardiac SurgerySeattle Children's HospitalSeattleWashingtonUSA
| | - Hidemi Kajimoto
- Center for Integrative Brain ResearchSeattle Children's Research InstituteSeattleWashingtonUSA
| | - Michael A. Portman
- Center for Integrative Brain ResearchSeattle Children's Research InstituteSeattleWashingtonUSA
- Division of Cardiology, Department of PediatricsUniversity of WashingtonSeattleWashingtonUSA
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Shimomura M, Fujie S, Sanada K, Kajimoto H, Hamaoka T, Iemitsu M. Higher ratio of plasma nitric oxide to asymmetric dimethylarginine levels affects aerobic exercise training-induced reduction of arterial stiffness in middle-aged and older adults. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.2445] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Regular aerobic exercise reverses aging-induced deterioration of arterial stiffness via an increased arterial nitric oxide (NO) production. Concurrently, asymmetric dimethylarginine (ADMA), an endogenous inhibitor of NO synthase, was decreased by aerobic exercise training. A recent study showed that the NOx/ADMA ratio reflects endothelial function and may be an index of the states of cardiovascular disease. However, whether changes in the NOx/ADMA ratio by aerobic exercise training are associated with a decrease in arterial stiffness in healthy middle-aged and older male and female adults remains unclear.
Purpose
This study aimed to clarify whether the relationship between plasma ADMA and NOx levels affected aerobic exercise training-induced reduction of arterial stiffness in middle-aged and older adults. Additionally, we examined whether the effect of AT on circulating ADMA levels differed according to sex.
Methods
Thirty-one healthy middle-aged and older male and female subjects (male = 13, female = 18, 66.4±1.3 years) participated in the study. The subjects were randomly divided into 2 groups: a training group (n=16 [male = 6 / female = 10], 64.8±2.0 years) and a control group (n=15 [male = 7 / female = 8], 68.1±1.6 years). Subjects in the training group performed the AT program, which consisted of cycling on a leg ergometer at 60–70% of peak oxygen uptake (V(·)O2peak)for 45 min/day, 3 days/week for 8 weeks. Before and after the 8-week aerobic exercise training intervention, V(·)O2peak, plasma ADMA levels and plasma NOx levels were measured in all subjects. Also, carotid β-stiffness as an index of arterial stiffness was determined with ultrasonography.
Results
Aerobic exercise training significantly increased V(·)O2peak (P<0.05) and decreased carotid b-stiffness (P<0.01). Moreover, plasma ADMA levels were significantly decreased, and plasma NOx levels and NOx/ADMA ratio were significantly increased by aerobic exercise training (P<0.01). Additionally, no sex differences in aerobic exercise training-induced changes in circulating ADMA and NOx levels, NOx/ADMA ratio, and carotid β-stiffness were observed. Furthermore, the aerobic exercise training-induced increase in circulating ADMA levels was negatively correlated with the increase in circulating NOx levels (r=−0.414, P<0.05), and aerobic exercise training induced increase in NOx/ADMA ratio was negatively correlated with the decrease in carotid β-stiffness (r=−0.514, P<0.01).
Conclusion
These results suggest that higher NOx/ADMA ratio affects aerobic exercise training-induced reduction of arterial stiffness, regardless of sex in middle-aged and older adults.
Funding Acknowledgement
Type of funding sources: Other. Main funding source(s): This work was supported by Grants-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science, and Technology of Japan
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Affiliation(s)
| | - S Fujie
- Ritsumeikan University, Kusatsu, Japan
| | - K Sanada
- Ritsumeikan University, Kusatsu, Japan
| | | | - T Hamaoka
- Tokyo Medical University, Shinjyuku, Japan
| | - M Iemitsu
- Ritsumeikan University, Kusatsu, Japan
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Izawa H, Kajimoto H, Morimoto M, Saimoto H, Ifuku S. Honeycomb-like porous chitosan films prepared via phase transition of poly(N-isopropylacrylamide) during water evaporation under ambient conditions. RSC Adv 2020; 10:19730-19735. [PMID: 35520439 PMCID: PMC9054209 DOI: 10.1039/d0ra03845h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 05/18/2020] [Indexed: 11/21/2022] Open
Abstract
Honeycomb-like porous chitosan (CS) films are attractive tools for developing functional materials for filters, catalyses, adsorbents, biomaterials, etc. A simple method for fabricating honeycomb-like porous CS films without special reagents, facilities, and techniques would make them accessible. Here we introduce an easily available method for fabricating honeycomb-like CS films without a strong acid/base, toxic reagents, or special facilities/techniques. An aqueous solution containing CS and poly(N-isopropylacrylamide) (PNIPAm) was allowed to stand at 25 °C to evaporate water. After 3 days, CS–PNIPAm composite films with homogenously phase-separated PNIPAm particles were obtained. The PNIPAm particles were removed by immersion in methanol, and the resulting films dried under reduced pressure to become honeycomb-like porous CS films. The pore size could be varied in the range of 0.5–3.0 μm by altering the CS concentration and the molecular weight of CS where the pore size was reduced under conditions with stronger interaction between CS molecules. We reveal that the key to success with this system is the decrease of lower critical solution temperature (LCST) of PNIPAm with water evaporation. In addition, we confirmed the removed PNIPAm was recyclable in this system. Furthermore, we found this method was also applicable to alginate. The proposed facile method for fabricating honeycomb-like porous polymeric films could provide various functional porous materials. A simple method for fabricating honeycomb-like porous chitosan films without special reagents, facilities, and techniques was achieved by using poly(N-isopropylacrylamide).![]()
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Affiliation(s)
- H. Izawa
- Department of Chemistry and Biotechnology
- Faculty of Engineering
- Tottori University
- Tottori 680-8550
- Japan
| | - H. Kajimoto
- Department of Chemistry and Biotechnology
- Faculty of Engineering
- Tottori University
- Tottori 680-8550
- Japan
| | - M. Morimoto
- Division of Instrumental Analysis
- Research Center for Bioscience and Technology
- Tottori University
- Tottori 680-8550
- Japan
| | - H. Saimoto
- Department of Chemistry and Biotechnology
- Faculty of Engineering
- Tottori University
- Tottori 680-8550
- Japan
| | - S. Ifuku
- Department of Chemistry and Biotechnology
- Faculty of Engineering
- Tottori University
- Tottori 680-8550
- Japan
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Oyama K, El-Nachef D, Fang C, Kajimoto H, Brown JP, Singh PB, MacLellan WR. Deletion of HP1γ in cardiac myocytes affects H4K20me3 levels but does not impact cardiac growth. Epigenetics Chromatin 2018; 11:18. [PMID: 29665845 PMCID: PMC5905015 DOI: 10.1186/s13072-018-0187-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 04/01/2018] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND Heterochromatin, which is formed when tri-methyl lysine 9 of histone H3 (H3K9me3) is bound by heterochromatin 1 proteins (HP1s), plays an important role in differentiation and senescence by silencing cell cycle genes. Cardiac myocytes (CMs) accumulate heterochromatin during differentiation and demethylation of H3K9me3 inhibits cell cycle gene silencing and cell cycle exit in CMs; however, it is unclear if this process is mediated by HP1s. In this study, we created a conditional CM-specific HP1 gamma (HP1γ) knockout (KO) mouse model and tested whether HP1γ is required for cell cycle gene silencing and cardiac growth. RESULTS HP1γ KO mice were generated by crossing HP1γ floxed mice (fl) with mice expressing Cre recombinase driven by the Nkx2.5 (cardiac progenitor gene) promoter (Cre). We confirmed that deletion of critical exons of HP1γ led to undetectable levels of HP1γ protein in HP1γ KO (Cre;fl/fl) CMs. Analysis of cardiac size and function by echo revealed no significant differences between HP1γ KO and control (WT, Cre, fl/fl) mice. No significant difference in expression of cell cycle genes or cardiac-specific genes was observed. Global transcriptome analysis demonstrated a very moderate effect of HP1γ deletion on global gene expression, with only 51 genes differentially expressed in HP1γ KO CMs. We found that HP1β protein, but not HP1α, was significantly upregulated and that subnuclear localization of HP1β to perinuclear heterochromatin was increased in HP1γ KO CMs. Although HP1γ KO had no effect on H3K9me3 levels, we found a significant reduction in another major heterochromatin mark, tri-methylated lysine 20 of histone H4 (H4K20me3). CONCLUSIONS These data indicate that HP1γ is dispensable for cell cycle exit and normal cardiac growth but has a significant role in maintaining H4K20me3 and regulating a limited number of genes in CMs.
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Affiliation(s)
- Kyohei Oyama
- Division of Cardiology, Department of Medicine, Center for Cardiovascular Biology and Institute for Stem Cell and Regenerative Medicine, University of Washington, 1959 NE Pacific St, Box 356422, Seattle, WA, 98195-6422, USA
| | - Danny El-Nachef
- Division of Cardiology, Department of Medicine, Center for Cardiovascular Biology and Institute for Stem Cell and Regenerative Medicine, University of Washington, 1959 NE Pacific St, Box 356422, Seattle, WA, 98195-6422, USA
| | - Chen Fang
- Division of Cardiology, Department of Medicine, Center for Cardiovascular Biology and Institute for Stem Cell and Regenerative Medicine, University of Washington, 1959 NE Pacific St, Box 356422, Seattle, WA, 98195-6422, USA
| | - Hidemi Kajimoto
- Division of Cardiology, Department of Medicine, Center for Cardiovascular Biology and Institute for Stem Cell and Regenerative Medicine, University of Washington, 1959 NE Pacific St, Box 356422, Seattle, WA, 98195-6422, USA
| | - Jeremy P Brown
- Fächerverbund Anatomie, Institut für Zell-und Neurobiologie, Charite-Universitätsmedizin, 10117, Berlin, Germany
| | - Prim B Singh
- Fächerverbund Anatomie, Institut für Zell-und Neurobiologie, Charite-Universitätsmedizin, 10117, Berlin, Germany.,Department of Biomedical Sciences, Nazarbayev University School of Medicine, Astana, Kazakhstan, 010000.,Department of Natural Sciences, Laboratory of epigenetics, Novosibirsk State University, Pirogova str. 1, Novosibirsk, 630090, Russian Federation
| | - W Robb MacLellan
- Division of Cardiology, Department of Medicine, Center for Cardiovascular Biology and Institute for Stem Cell and Regenerative Medicine, University of Washington, 1959 NE Pacific St, Box 356422, Seattle, WA, 98195-6422, USA.
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Uchiwa H, Kai H, Iwamoto Y, Anegawa T, Kajimoto H, Fukuda K, Imaizumi T, Fukumoto Y. Losartan/hydrochlorothiazide combination is safe and effective for morning hypertension in Very-Elderly patients. Clin Exp Hypertens 2017; 40:267-273. [PMID: 29083936 DOI: 10.1080/10641963.2017.1368536] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Morning hypertension is an independent risk for cerebrovascular and cardiovascular events. Although the prevalence of morning hypertension increases with age, treatment of morning hypertension has not been established, particularly in Very-Elderly patients. We compared the safety and efficacy of a losartan/hydrochlorothiazide (HCTZ) combination in controlling morning hypertension between Very-Elderly (≥75 years) and Young/Elderly patients (<75 years). This study was a subanalysis of the Morning Hypertension and Angiotensin Receptor Blocker/Hydrochlorothiazide Combination Therapy study, in which patients with morning hypertension (≥135/85 mmHg) received a 50-mg losartan/12.5-mg HCTZ combination tablet (combination therapy) or 100-mg losartan (high-dose therapy) for 3 months. High adherence rates and few adverse effects were observed in Very-Elderly patients receiving combination (n = 32) and high-dose (n = 34) therapies and in Young/Elderly patients receiving combination (n = 69) and high-dose (n = 66) therapies. Baseline morning systolic BP (SBP) was similar in both age groups receiving either therapy. Morning SBP was reduced by 20.2 and 18.1 mmHg with combination therapy and by 7.1 and 9.1 mmHg with high-dose therapy in the Very-Elderly and Young/Elderly patients, respectively. Morning BP target (<135/85 mmHg) was achieved in 40.6% and 55.1% by combination therapy and in 14.7% and 24.2% by high-dose therapy in the Very-Elderly and Young/Elderly patients, respectively. Neither therapy changed renal function and serum potassium in Very-Elderly patients. In conclusion, the losartan/HCTZ combination was safe and effective in controlling morning hypertension in Very-Elderly as well as Young/Elderly patients. In addition, combination therapy was also superior to high-dose therapy for lowering morning SBP in Very-Elderly patients.
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Affiliation(s)
- Hiroki Uchiwa
- a Department of Internal Medicine, Division of Cardio-Vascular Medicine , Kurume University School of Medicine , Kurume , Japan
| | - Hisashi Kai
- b Department of Cardiology , Kurume University Medical Center , Kurume , Japan
| | - Yoshiko Iwamoto
- a Department of Internal Medicine, Division of Cardio-Vascular Medicine , Kurume University School of Medicine , Kurume , Japan
| | - Takahiro Anegawa
- a Department of Internal Medicine, Division of Cardio-Vascular Medicine , Kurume University School of Medicine , Kurume , Japan
| | - Hidemi Kajimoto
- a Department of Internal Medicine, Division of Cardio-Vascular Medicine , Kurume University School of Medicine , Kurume , Japan.,c Department of Cardiology , University of Washington , Seattle , WA , USA
| | - Kenji Fukuda
- a Department of Internal Medicine, Division of Cardio-Vascular Medicine , Kurume University School of Medicine , Kurume , Japan.,d Department of Cerebrovascular Medicine , St. Mary's Hospital , Kurume , Japan
| | - Tsutomu Imaizumi
- e Fukuoka International College of Health and Welfare , Fukuoka , Japan
| | - Yoshihiro Fukumoto
- a Department of Internal Medicine, Division of Cardio-Vascular Medicine , Kurume University School of Medicine , Kurume , Japan
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Kajimoto M, Ledee DR, Xu C, Kajimoto H, Isern NG, Portman MA. Triiodothyronine Activates Lactate Oxidation Without Impairing Fatty Acid Oxidation and Improves Weaning From Extracorporeal Membrane Oxygenation. Circ J 2014:DN/JST.JSTAGE/circj/CJ-14-0821. [PMID: 25354460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Background:Extracorporeal membrane oxygenation (ECMO) provides a rescue for children with severe cardiac failure. It has previously been shown that triiodothyronine (T3) improves cardiac function by modulating pyruvate oxidation during weaning. This study focused on fatty acid (FA) metabolism modulated by T3 for weaning from ECMO after cardiac injury.Methods and Results:Nineteen immature piglets (9.1-15.3 kg) were separated into 3 groups with ECMO (6.5 h) and wean: normal circulation (Group-C); transient coronary occlusion (10 min) for ischemia-reperfusion (IR) followed by ECMO (Group-IR); and IR with T3 supplementation (Group-IR-T3). 13-Carbon (13C)-labeled lactate, medium-chain and long-chain FAs, was infused as oxidative substrates. Substrate fractional contribution (FC) to the citric acid cycle was analyzed by13C-nuclear magnetic resonance. ECMO depressed circulating T3 levels to 40% of the baseline at 4 h and were restored in Group-IR-T3. Group-IR decreased cardiac power, which was not fully restorable and 2 pigs were lost because of weaning failure. Group-IR also depressed FC-lactate, while the excellent contractile function and energy efficiency in Group-IR-T3 occurred along with a marked FC-lactate increase and [adenosine triphosphate]/[adenosine diphosphate] without either decreasing FC-FAs or elevating myocardial oxygen consumption over Group-C or -IR.Conclusions:T3 releases inhibition of lactate oxidation following IR injury without impairing FA oxidation. These findings indicate that T3 depression during ECMO is maladaptive, and that restoring levels improves metabolic flux and enhances contractile function during weaning.
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Affiliation(s)
- Masaki Kajimoto
- Center for Developmental Therapeutics, Seattle Children's Research Institute
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Kajimoto M, Ledee DR, Xu C, Kajimoto H, Isern NG, Portman MA. Triiodothyronine activates lactate oxidation without impairing fatty acid oxidation and improves weaning from extracorporeal membrane oxygenation. Circ J 2014; 78:2867-2875. [PMID: 25421230 PMCID: PMC5570456] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
BACKGROUND Extracorporeal membrane oxygenation (ECMO) provides a rescue for children with severe cardiac failure. It has previously been shown that triiodothyronine (T3) improves cardiac function by modulating pyruvate oxidation during weaning. This study focused on fatty acid (FA) metabolism modulated by T3 for weaning from ECMO after cardiac injury. METHODS AND RESULTS: Nineteen immature piglets (9.1-15.3 kg) were separated into 3 groups with ECMO (6.5 h) and wean: normal circulation (Group-C); transient coronary occlusion (10 min) for ischemia-reperfusion (IR) followed by ECMO (Group-IR); and IR with T3 supplementation (Group-IR-T3). 13-Carbon ((13)C)-labeled lactate, medium-chain and long-chain FAs, was infused as oxidative substrates. Substrate fractional contribution (FC) to the citric acid cycle was analyzed by(13)C-nuclear magnetic resonance. ECMO depressed circulating T3 levels to 40% of the baseline at 4 h and were restored in Group-IR-T3. Group-IR decreased cardiac power, which was not fully restorable and 2 pigs were lost because of weaning failure. Group-IR also depressed FC-lactate, while the excellent contractile function and energy efficiency in Group-IR-T3 occurred along with a marked FC-lactate increase and [adenosine triphosphate]/[adenosine diphosphate] without either decreasing FC-FAs or elevating myocardial oxygen consumption over Group-C or -IR. CONCLUSIONS T3 releases inhibition of lactate oxidation following IR injury without impairing FA oxidation. These findings indicate that T3 depression during ECMO is maladaptive, and that restoring levels improves metabolic flux and enhances contractile function during weaning.
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Affiliation(s)
- Masaki Kajimoto
- Center for Developmental Therapeutics, Seattle Children's Research Institute
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Chibana H, Kajimoto H, Ueno T, Yokoyama S, Sasaki K, Ohtsuka M, Nakayoshi T, Mitsutake Y, Itaya N, Sasaki M, Fukumoto Y. There is a correlation between interleukin-1beta and endothelial dysfunction in patients with mTOR inhibitor-eluting stent implantation. Atherosclerosis 2014. [DOI: 10.1016/j.atherosclerosis.2014.05.171] [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: 11/24/2022]
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10
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Nakayoshi T, Sasaki KI, Kajimoto H, Koiwaya H, Ohtsuka M, Ueno T, Chibana H, Itaya N, Sasaki M, Yokoyama S, Fukumoto Y, Imaizumi T. FOXO4-knockdown suppresses oxidative stress-induced apoptosis of early pro-angiogenic cells and augments their neovascularization capacities in ischemic limbs. PLoS One 2014; 9:e92626. [PMID: 24663349 PMCID: PMC3963928 DOI: 10.1371/journal.pone.0092626] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Accepted: 02/24/2014] [Indexed: 01/13/2023] Open
Abstract
The effects of therapeutic angiogenesis by intramuscular injection of early pro-angiogenic cells (EPCs) to ischemic limbs are unsatisfactory. Oxidative stress in the ischemic limbs may accelerate apoptosis of injected EPCs, leading to less neovascularization. Forkhead transcription factor 4 (FOXO4) was reported to play a pivotal role in apoptosis signaling of EPCs in response to oxidative stress. Accordingly, we assessed whether FOXO4-knockdown EPCs (FOXO4KD-EPCs) could suppress the oxidative stress-induced apoptosis and augment the neovascularization capacity in ischemic limbs. We transfected small interfering RNA targeted against FOXO4 of human EPCs to generate FOXO4KD-EPCs and confirmed a successful knockdown. FOXO4KD-EPCs gained resistance to apoptosis in response to hydrogen peroxide in vitro. Oxidative stress stained by dihydroethidium was stronger for the immunodeficient rat ischemic limb tissue than for the rat non-ischemic one. Although the number of apoptotic EPCs injected into the rat ischemic limb was greater than that of apoptotic EPCs injected into the rat non-ischemic limb, FOXO4KD-EPCs injected into the rat ischemic limb brought less apoptosis and more neovascularization than EPCs. Taken together, the use of FOXO4KD-EPCs with resistance to oxidative stress-induced apoptosis may be a new strategy to augment the effects of therapeutic angiogenesis by intramuscular injection of EPCs.
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Affiliation(s)
- Takaharu Nakayoshi
- Division of Cardio-Vascular Medicine, Department of Internal Medicine, Kurume University School of Medicine, Fukuoka, Japan
| | - Ken-ichiro Sasaki
- Division of Cardio-Vascular Medicine, Department of Internal Medicine, Kurume University School of Medicine, Fukuoka, Japan
- The Cardiovascular Research Institute, Kurume University, Fukuoka, Japan
- * E-mail:
| | - Hidemi Kajimoto
- The Cardiovascular Research Institute, Kurume University, Fukuoka, Japan
| | - Hiroshi Koiwaya
- Division of Cardio-Vascular Medicine, Department of Internal Medicine, Kurume University School of Medicine, Fukuoka, Japan
| | - Masanori Ohtsuka
- Division of Cardio-Vascular Medicine, Department of Internal Medicine, Kurume University School of Medicine, Fukuoka, Japan
| | - Takafumi Ueno
- Division of Cardio-Vascular Medicine, Department of Internal Medicine, Kurume University School of Medicine, Fukuoka, Japan
| | - Hidetoshi Chibana
- Division of Cardio-Vascular Medicine, Department of Internal Medicine, Kurume University School of Medicine, Fukuoka, Japan
| | - Naoki Itaya
- Division of Cardio-Vascular Medicine, Department of Internal Medicine, Kurume University School of Medicine, Fukuoka, Japan
| | - Masahiro Sasaki
- Division of Cardio-Vascular Medicine, Department of Internal Medicine, Kurume University School of Medicine, Fukuoka, Japan
| | - Shinji Yokoyama
- Division of Cardio-Vascular Medicine, Department of Internal Medicine, Kurume University School of Medicine, Fukuoka, Japan
| | - Yoshihiro Fukumoto
- Division of Cardio-Vascular Medicine, Department of Internal Medicine, Kurume University School of Medicine, Fukuoka, Japan
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Aoki Y, Kai H, Kajimoto H, Kudo H, Takayama N, Yasuoka S, Anegawa T, Iwamoto Y, Uchiwa H, Fukuda K, Kage M, Kato S, Fukumoto Y, Imaizumi T. Large Blood Pressure Variability Aggravates Arteriolosclerosis and Cortical Sclerotic Changes in the Kidney in Hypertensive Rats. Circ J 2014; 78:2284-91. [DOI: 10.1253/circj.cj-14-0027] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yuji Aoki
- Department of Internal Medicine, Division of Cardio-Vascular Medicine, Kurume University School of Medicine
| | - Hisashi Kai
- Department of Internal Medicine, Division of Cardio-Vascular Medicine, Kurume University School of Medicine
| | | | - Hiroshi Kudo
- Department of Internal Medicine, Division of Cardio-Vascular Medicine, Kurume University School of Medicine
| | - Narimasa Takayama
- Department of Internal Medicine, Division of Cardio-Vascular Medicine, Kurume University School of Medicine
| | - Suguru Yasuoka
- Department of Internal Medicine, Division of Cardio-Vascular Medicine, Kurume University School of Medicine
| | - Takahiro Anegawa
- Department of Internal Medicine, Division of Cardio-Vascular Medicine, Kurume University School of Medicine
| | - Yoshiko Iwamoto
- Department of Internal Medicine, Division of Cardio-Vascular Medicine, Kurume University School of Medicine
| | - Hiroki Uchiwa
- Department of Internal Medicine, Division of Cardio-Vascular Medicine, Kurume University School of Medicine
| | - Kenji Fukuda
- Department of Internal Medicine, Division of Cardio-Vascular Medicine, Kurume University School of Medicine
| | - Masayoshi Kage
- Department of Diagnostic Pathology, Kurume University Hospital
| | - Seiya Kato
- Division of Pathology, Saiseikai Fukuoka General Hospital
| | - Yoshihiro Fukumoto
- Department of Internal Medicine, Division of Cardio-Vascular Medicine, Kurume University School of Medicine
| | - Tsutomu Imaizumi
- Department of Internal Medicine, Division of Cardio-Vascular Medicine, Kurume University School of Medicine
- International University of Health and Welfare, Fukuoka Sannno Hospital
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12
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Kajimoto M, Ledee DR, Xu C, Kajimoto H, Isern NG, Portman MA. Triiodothyronine Activates Lactate Oxidation Without Impairing Fatty Acid Oxidation and Improves Weaning From Extracorporeal Membrane Oxygenation. Circ J 2014. [DOI: 10.1253/circj.cj-14-0821] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Masaki Kajimoto
- Center for Developmental Therapeutics, Seattle Children’s Research Institute
| | - Dolena R. Ledee
- Center for Developmental Therapeutics, Seattle Children’s Research Institute
| | - Chun Xu
- Center for Developmental Therapeutics, Seattle Children’s Research Institute
| | - Hidemi Kajimoto
- Center for Developmental Therapeutics, Seattle Children’s Research Institute
| | - Nancy G. Isern
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory
| | - Michael A. Portman
- Center for Developmental Therapeutics, Seattle Children’s Research Institute
- Division of Cardiology, Department of Pediatrics, University of Washington
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13
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Kajimoto H, Kai H, Aoki H, Uchiwa H, Aoki Y, Iwamoto Y, Imaizumi T. Bone morphogenetic protein receptor activation plays a crucial role in endothelial dysfunction and osteogenic differentiation in mice with chronic kidney disease. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht307.p616] [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: 11/13/2022] Open
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14
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Yasuoka S, Kai H, Kajimoto H, Kudo H, Takayama N, Anegawa T, Koga M, Miyamoto T, Mifune H, Kage M, Hirooka Y, Imaizumi T. Blood Pressure Variability Activates Cardiac Mineralocorticoid Receptor and Induces Cardiac Remodeling in Hypertensive Rats. Circ J 2013; 77:1474-81. [DOI: 10.1253/circj.cj-12-1253] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Suguru Yasuoka
- Department of Internal Medicine Division of Cardio-Vascular Medicine, Kurume University School of Medicine
| | - Hisashi Kai
- Department of Internal Medicine Division of Cardio-Vascular Medicine, Kurume University School of Medicine
| | - Hidemi Kajimoto
- Cardiovascular Research Institute, Kurume University School of Medicine
| | - Hiroshi Kudo
- Department of Internal Medicine Division of Cardio-Vascular Medicine, Kurume University School of Medicine
| | - Narimasa Takayama
- Department of Internal Medicine Division of Cardio-Vascular Medicine, Kurume University School of Medicine
| | - Takahiro Anegawa
- Department of Internal Medicine Division of Cardio-Vascular Medicine, Kurume University School of Medicine
| | - Mitsuhisa Koga
- Cardiovascular Research Institute, Kurume University School of Medicine
- Department of Pharmaceutical Care and Health Sciences, Faculty of Pharmaceutical Sciences, Fukuoka University
| | - Takanobu Miyamoto
- Cardiovascular Research Institute, Kurume University School of Medicine
| | - Hiroharu Mifune
- Institute of Animal Experimentation, Kurume University School of Medicine
| | - Masayoshi Kage
- Department of Diagnostic Pathology, Kurume University Hospital
| | - Yoshitaka Hirooka
- Cardiovascular Medicine, Kyushu University Graduate School of Medical Sciences
| | - Tsutomu Imaizumi
- Department of Internal Medicine Division of Cardio-Vascular Medicine, Kurume University School of Medicine
- Cardiovascular Research Institute, Kurume University School of Medicine
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15
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Aoki Y, Kai H, Kajimoto H, Kudo H, Takayama N, Yasuoka S, Anegawa T, Uchiwa H, Kato S, Imaizumi T. Exaggerated Blood Pressure Variability Aggravates Arteriolosclerosis and Interstitial Ischemic Lesions in the Kidney of Hypertensive Rats. J Card Fail 2012. [DOI: 10.1016/j.cardfail.2012.08.285] [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: 11/25/2022]
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16
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Toyama Y, Sasaki KI, Tachibana K, Ueno T, Kajimoto H, Yokoyama S, Ohtsuka M, Koiwaya H, Nakayoshi T, Mitsutake Y, Chibana H, Itaya N, Imaizumi T. Abstract 139: Ultrasound Stimulation Restores Impaired Neovascularization-Related Capacities of Human Circulating Angiogenic Cells. Circ Res 2012. [DOI: 10.1161/res.111.suppl_1.a139] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Aims:
Unsatisfactory effects of therapeutic angiogenesis in critical limb ischemia may be ascribed to use of circulating angiogenic cells (CACs) with impaired neovascularization-related capacities of atherosclerotic patients. We tested whether ultrasound cell stimulation can restore the impaired capacities.
Methods and Results:
During four-day-culture of human peripheral blood-derived mononuclear cells to achieve CACs, we stimulated the culture cells daily with low-intensity pulsed ultrasound stimulation (LIPUS). LIPUS to healthy volunteer-derived culture cells augmented generation and migration capacities of CACs, increased concentrations of angiopoietin 2 and nitrogen oxides in the culture medium, and increased expressions of phosphorylated-Akt and endothelial nitric oxide synthetase in CACs on western blotting. LIPUS to atherosclerotic patient-derived culture cells also augmented the generation and migration capacities of CACs. Although neovascularization in the ischemic hindlimb of athymic nude mice was impaired after intramuscular injection of atherosclerotic patient-derived CACs compared with that of healthy volunteer-derived CACs, LIPUS to atherosclerotic patient-derived culture cells restored the impaired neovascularization.
Conclusion:
Therapeutic angiogenesis with LIPUS-pretreated CACs may be a new strategy to rescue critical limb ischemia in atherosclerotic patients.
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Toyama Y, Sasaki KI, Tachibana K, Ueno T, Kajimoto H, Yokoyama S, Ohtsuka M, Koiwaya H, Nakayoshi T, Mitsutake Y, Chibana H, Itaya N, Imaizumi T. Ultrasound stimulation restores impaired neovascularization-related capacities of human circulating angiogenic cells. Cardiovasc Res 2012; 95:448-59. [PMID: 22641844 DOI: 10.1093/cvr/cvs173] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
AIMS Unsatisfactory effects of therapeutic angiogenesis in critical limb ischaemia may be ascribed to use of circulating angiogenic cells (CACs) derived from atherosclerotic patients with impaired neovascularization-related capacities. We tested whether ultrasound cell stimulation can restore the impaired capacities. METHODS AND RESULTS During culture of human peripheral blood-derived mononuclear cells for 4 days to achieve CACs, we stimulated the cells in culture daily with low-intensity pulsed ultrasound stimulation (LIPUS). Application of LIPUS to cells in culture derived from healthy volunteers augmented the generation and migration capacities of CACs, increased concentrations of angiopoietin 2 and nitrogen oxides in the culture medium, and increased the expression of phosphorylated-Akt and endothelial nitric oxide synthase in CACs on western blotting. Application of LIPUS to cells in culture derived from atherosclerotic patients also augmented the generation and migration capacities of CACs. Although neovascularization in the ischaemic hindlimb of athymic nude mice was impaired after intramuscular injection of CACs derived from atherosclerotic patients compared with that using CACs derived from healthy volunteers, LIPUS of the cells in culture derived from atherosclerotic patients restored the neovascularization capacities. CONCLUSION Therapeutic angiogenesis with LIPUS-pre-treated CACs may be a new strategy to rescue critical limb ischaemia in atherosclerotic patients.
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MESH Headings
- Angiopoietin-2/metabolism
- Animals
- Atherosclerosis/metabolism
- Atherosclerosis/pathology
- Atherosclerosis/physiopathology
- Blotting, Western
- Case-Control Studies
- Cell Movement
- Cell Proliferation
- Cells, Cultured
- Disease Models, Animal
- Hindlimb
- Humans
- Ischemia/metabolism
- Ischemia/pathology
- Ischemia/physiopathology
- Ischemia/therapy
- Leukocytes, Mononuclear/metabolism
- Leukocytes, Mononuclear/pathology
- Leukocytes, Mononuclear/transplantation
- Mice
- Mice, Inbred BALB C
- Mice, Nude
- Muscle, Skeletal/blood supply
- Neovascularization, Physiologic
- Nitric Oxide/metabolism
- Nitric Oxide Synthase Type III/metabolism
- Phenotype
- Phosphorylation
- Proto-Oncogene Proteins c-akt/metabolism
- Signal Transduction
- Time Factors
- Ultrasonics
- Up-Regulation
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Affiliation(s)
- Yasuyuki Toyama
- Department of Internal Medicine, Division of Cardio-Vascular Medicine, Kurume University School of Medicine, 67 Asahi-machi, Kurume 830-0011, Japan
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Abstract
An electrotactile display is a tactile interface composed of skin surface electrodes. The use of such a device is limited by the variability of the elicited sensation. One possible solution to this problem is to monitor skin electrical impedance. Previous studies revealed a correlation between impedance and threshold, but did not construct real-time feedback loops. In this study, an electrotactile display was constructed using a 1.45 μs feedback loop. Real-time pulse width modulation was proposed, and the relationship between skin resistance and absolute threshold was measured to find a function for determining a suitable pulse width from skin resistance. An evaluation experiment revealed that the proposed algorithm suppressed spatial variation and reduced temporal change.
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19
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Thenappan T, Goel A, Marsboom G, Fang YH, Toth PT, Zhang HJ, Kajimoto H, Hong Z, Paul J, Wietholt C, Pogoriler J, Piao L, Rehman J, Archer SL. A central role for CD68(+) macrophages in hepatopulmonary syndrome. Reversal by macrophage depletion. Am J Respir Crit Care Med 2011; 183:1080-91. [PMID: 21148721 PMCID: PMC3086745 DOI: 10.1164/rccm.201008-1303oc] [Citation(s) in RCA: 130] [Impact Index Per Article: 10.0] [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: 08/19/2010] [Accepted: 11/21/2010] [Indexed: 12/16/2022] Open
Abstract
RATIONALE The etiology of hepatopulmonary syndrome (HPS), a common complication of cirrhosis, is unknown. Inflammation and macrophage accumulation occur in HPS; however, their importance is unclear. Common bile duct ligation (CBDL) creates an accepted model of HPS, allowing us to investigate the cause of HPS. OBJECTIVES We hypothesized that macrophages are central to HPS and investigated the therapeutic potential of macrophage depletion. METHODS Hemodynamics, alveolar-arterial gradient, vascular reactivity, and histology were assessed in CBDL versus sham rats (n = 21 per group). The effects of plasma on smooth muscle cell proliferation and endothelial tube formation were measured. Macrophage depletion was used to prevent (gadolinium) or regress (clodronate) HPS. CD68(+) macrophages and capillary density were measured in the lungs of patients with cirrhosis versus control patients (n = 10 per group). MEASUREMENTS AND MAIN RESULTS CBDL increased cardiac output and alveolar-arterial gradient by causing capillary dilatation and arteriovenous malformations. Activated CD68(+)macrophages (nuclear factor-κB+) accumulated in HPS pulmonary arteries, drawn by elevated levels of plasma endotoxin and lung monocyte chemoattractant protein-1. These macrophages expressed inducible nitric oxide synthase, vascular endothelial growth factor, and platelet-derived growth factor. HPS plasma increased endothelial tube formation and pulmonary artery smooth muscle cell proliferation. Macrophage depletion prevented and reversed the histological and hemodynamic features of HPS. CBDL lungs demonstrated increased medial thickness and obstruction of small pulmonary arteries. Nitric oxide synthase inhibition unmasked exaggerated pulmonary vasoconstrictor responses in HPS. Patients with cirrhosis had increased pulmonary intravascular macrophage accumulation and capillary density. CONCLUSIONS HPS results from intravascular accumulation of CD68(+)macrophages. An occult proliferative vasculopathy may explain the occasional transition to portopulmonary hypertension. Macrophage depletion may have therapeutic potential in HPS.
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MESH Headings
- Animals
- Antigens, CD/immunology
- Antigens, CD/physiology
- Antigens, Differentiation, Myelomonocytic/immunology
- Antigens, Differentiation, Myelomonocytic/physiology
- Arteriovenous Malformations/etiology
- Arteriovenous Malformations/physiopathology
- Disease Models, Animal
- Extracellular Signal-Regulated MAP Kinases/metabolism
- Hepatopulmonary Syndrome/etiology
- Hepatopulmonary Syndrome/immunology
- Humans
- Lung/blood supply
- Lung/cytology
- Lung/immunology
- Macrophages/immunology
- Macrophages/physiology
- Male
- Muscle, Smooth, Vascular/physiopathology
- Nitric Oxide Synthase Type II/antagonists & inhibitors
- Nitric Oxide Synthase Type II/physiology
- Platelet-Derived Growth Factor/antagonists & inhibitors
- Platelet-Derived Growth Factor/physiology
- Rats
- Rats, Sprague-Dawley
- Signal Transduction/physiology
- Vascular Endothelial Growth Factor A/antagonists & inhibitors
- Vascular Endothelial Growth Factor A/physiology
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Affiliation(s)
- Thenappan Thenappan
- Section of Cardiology, Department of Medicine, The University of Chicago, Chicago, Illinois; and The Cardiovascular Research Institute, Kurume University, Kurume, Fukuoka, Japan
| | - Ankush Goel
- Section of Cardiology, Department of Medicine, The University of Chicago, Chicago, Illinois; and The Cardiovascular Research Institute, Kurume University, Kurume, Fukuoka, Japan
| | - Glenn Marsboom
- Section of Cardiology, Department of Medicine, The University of Chicago, Chicago, Illinois; and The Cardiovascular Research Institute, Kurume University, Kurume, Fukuoka, Japan
| | - Yong-Hu Fang
- Section of Cardiology, Department of Medicine, The University of Chicago, Chicago, Illinois; and The Cardiovascular Research Institute, Kurume University, Kurume, Fukuoka, Japan
| | - Peter T. Toth
- Section of Cardiology, Department of Medicine, The University of Chicago, Chicago, Illinois; and The Cardiovascular Research Institute, Kurume University, Kurume, Fukuoka, Japan
| | - Hannah J. Zhang
- Section of Cardiology, Department of Medicine, The University of Chicago, Chicago, Illinois; and The Cardiovascular Research Institute, Kurume University, Kurume, Fukuoka, Japan
| | - Hidemi Kajimoto
- Section of Cardiology, Department of Medicine, The University of Chicago, Chicago, Illinois; and The Cardiovascular Research Institute, Kurume University, Kurume, Fukuoka, Japan
| | - Zhigang Hong
- Section of Cardiology, Department of Medicine, The University of Chicago, Chicago, Illinois; and The Cardiovascular Research Institute, Kurume University, Kurume, Fukuoka, Japan
| | - Jonathan Paul
- Section of Cardiology, Department of Medicine, The University of Chicago, Chicago, Illinois; and The Cardiovascular Research Institute, Kurume University, Kurume, Fukuoka, Japan
| | - Christian Wietholt
- Section of Cardiology, Department of Medicine, The University of Chicago, Chicago, Illinois; and The Cardiovascular Research Institute, Kurume University, Kurume, Fukuoka, Japan
| | - Jennifer Pogoriler
- Section of Cardiology, Department of Medicine, The University of Chicago, Chicago, Illinois; and The Cardiovascular Research Institute, Kurume University, Kurume, Fukuoka, Japan
| | - Lin Piao
- Section of Cardiology, Department of Medicine, The University of Chicago, Chicago, Illinois; and The Cardiovascular Research Institute, Kurume University, Kurume, Fukuoka, Japan
| | - Jalees Rehman
- Section of Cardiology, Department of Medicine, The University of Chicago, Chicago, Illinois; and The Cardiovascular Research Institute, Kurume University, Kurume, Fukuoka, Japan
| | - Stephen L. Archer
- Section of Cardiology, Department of Medicine, The University of Chicago, Chicago, Illinois; and The Cardiovascular Research Institute, Kurume University, Kurume, Fukuoka, Japan
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Yasuoka S, Kai H, Kajimoto H, Anegawa T, Kudo H, Takayama N, Imaizumi T. Eplerenone Prevented the Large Blood Pressure Variability-Induced Aggravation of Hypertensive Cardiac Remodeling and Left Ventricular Dysfunction in Spontaneously Hypertensive Rats. J Card Fail 2010. [DOI: 10.1016/j.cardfail.2010.07.152] [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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21
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Yasuoka S, Kai H, Ikeda A, Anagewa T, Kajimoto H, Imaizumi T. Selective Collection and Gene Expression Analysis of Each Tissue Component of the Heart Using Laser Microdissection Method. J Card Fail 2009. [DOI: 10.1016/j.cardfail.2009.07.145] [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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22
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Kajimoto H, Kai H, Yasuoka S, Aoki H, Anegawa T, Imaizumi T. Asymmetric Dimethylarginine is a Paracrine Regulator of Vascular Function in CKD. J Card Fail 2009. [DOI: 10.1016/j.cardfail.2009.07.148] [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: 10/20/2022]
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23
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Kudo H, Kai H, Kajimoto H, Koga M, Takayama N, Mori T, Ikeda A, Yasuoka S, Anegawa T, Mifune H, Kato S, Hirooka Y, Imaizumi T. Exaggerated blood pressure variability superimposed on hypertension aggravates cardiac remodeling in rats via angiotensin II system-mediated chronic inflammation. Hypertension 2009; 54:832-8. [PMID: 19704105 DOI: 10.1161/hypertensionaha.109.135905] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Hypertensive patients with large blood pressure variability (BPV) have aggravated end-organ damage. However, the pathogenesis remains unknown. We investigated whether exaggerated BPV aggravates hypertensive cardiac remodeling and function by activating inflammation and angiotensin II-mediated mechanisms. A model of exaggerated BPV superimposed on chronic hypertension was created by performing bilateral sinoaortic denervation (SAD) in spontaneously hypertensive rats (SHRs). SAD increased BPV to a similar extent in Wistar Kyoto rats and SHRs without significant changes in mean blood pressure. SAD aggravated left ventricular and myocyte hypertrophy and myocardial fibrosis to a greater extent and impaired left ventricular systolic function in SHRs. SAD induced monocyte chemoattractant protein-1, transforming growth factor-beta, and angiotensinogen mRNA upregulations and macrophage infiltration of the heart in SHRs. The effects of SAD on cardiac remodeling and inflammation were much smaller in Wistar Kyoto rats compared with SHRs. Circulating levels of norepinephrine, the active form of renin, and inflammatory cytokines were not affected by SAD in Wistar Kyoto rats and SHRs. A subdepressor dose of candesartan abolished the SAD-induced left ventricular/myocyte hypertrophy, myocardial fibrosis, macrophage infiltration, and inductions of monocyte chemoattractant protein-1, transforming growth factor-beta, and angiotensinogen and subsequently prevented systolic dysfunction in SHRs with SAD. These findings suggest that exaggerated BPV induces chronic myocardial inflammation and thereby aggravates cardiac remodeling and systolic function in hypertensive hearts. The cardiac angiotensin II system may play a role in the pathogenesis of cardiac remodeling and dysfunction induced by a combination of hypertension and exaggerated BPV.
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Affiliation(s)
- Hiroshi Kudo
- Department of Internal Medicine, Division of Cardio-Vascular Medicine, Kurume University School of Medicine, 67 Asahimachi, Kurume, Japan
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Kajimoto H, Nakazawa M, Murasaki K, Hagiwara N, Nakanishi T. Increased P-Selectin Expression on Platelets and Decreased Plasma Thrombomodulin in Fontan Patients. Circ J 2009; 73:1705-10. [DOI: 10.1253/circj.cj-08-1087] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hidemi Kajimoto
- Department of Pediatric Cardiology, Heart Institute of Japan, Tokyo Women's Medical University
| | - Makoto Nakazawa
- Pediatric and Lifelong Congenital Cardiology Institute, Southern Tohoku General Hospital
| | - Kagari Murasaki
- Department of Cardiology, Heart Institute of Japan, Tokyo Women's Medical University
| | - Nobuhisa Hagiwara
- Department of Cardiology, Heart Institute of Japan, Tokyo Women's Medical University
| | - Toshio Nakanishi
- Department of Pediatric Cardiology, Heart Institute of Japan, Tokyo Women's Medical University
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Kai H, Kudo H, Takayama N, Yasuoka S, Kajimoto H, Imaizumi T. Large Blood Pressure Variability and Hypertensive Cardiac Remodeling Role of Cardiac Inflammation. Circ J 2009; 73:2198-203. [DOI: 10.1253/circj.cj-09-0741] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hisashi Kai
- Department of Internal Medicine, Division of Cardio-Vascular Medicine, Kurume University School of Medicine
| | - Hiroshi Kudo
- Department of Internal Medicine, Division of Cardio-Vascular Medicine, Kurume University School of Medicine
| | - Narimasa Takayama
- Department of Internal Medicine, Division of Cardio-Vascular Medicine, Kurume University School of Medicine
| | - Suguru Yasuoka
- Department of Internal Medicine, Division of Cardio-Vascular Medicine, Kurume University School of Medicine
| | - Hidemi Kajimoto
- Department of Internal Medicine, Division of Cardio-Vascular Medicine, Kurume University School of Medicine
| | - Tsutomu Imaizumi
- Department of Internal Medicine, Division of Cardio-Vascular Medicine, Kurume University School of Medicine
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26
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Thébaud B, Wu XC, Kajimoto H, Bonnet S, Hashimoto K, Michelakis ED, Archer SL. Developmental absence of the O2 sensitivity of L-type calcium channels in preterm ductus arteriosus smooth muscle cells impairs O2 constriction contributing to patent ductus arteriosus. Pediatr Res 2008; 63:176-81. [PMID: 18091358 DOI: 10.1203/pdr.0b013e31815ed059] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Patent ductus arteriosus (PDA) complicates the hospital course of premature infants. Impaired oxygen (O2)-induced vasoconstriction in preterm ductus arteriosus (DA) contributes to PDA and results, in part, from decreased function/expression of O2-sensitive, voltage-gated potassium channels (Kv) in DA smooth muscle cells (DASMCs). This paradigm suggests that activation of the voltage-sensitive L-type calcium channels (CaL), which increases cytosolic calcium ([Ca2+]i), is a passive consequence of membrane depolarization. However, effective Kv gene transfer only partially matures O2 responsiveness in preterm DA. Thus, we hypothesized that CaL are directly O2 sensitive and that immaturity of CaL function in preterm DA contributes to impaired O2 constriction. We show that preterm rabbit DA rings have reduced O2- and 4-aminopyridine (Kv blocker)-induced constriction. Preterm rabbit DASMCs have reduced O2-induced whole-cell calcium current (ICa) and [Ca2+]i. BAY K8644, a CaL activator, increased O2 constriction, ICa, and [Ca]i in preterm DASMCs to levels seen at term but had no effect on human and rabbit term DA. Preterm rabbit DAs have decreased gamma and increased alpha subunit protein expression. We conclude that the CaL in term rabbit and human DASMCs is directly O2 sensitive. Functional immaturity of CaL O2 sensitivity contributes to impaired O2 constriction in premature DA and can be reversed by BAY K8644.
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Affiliation(s)
- Bernard Thébaud
- Department of Pediatrics, Division of Neonatology, University of Alberta, Edmonton, T6G 2J3, AB, Canada
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27
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Kajimoto H, Hashimoto K, Bonnet SN, Haromy A, Harry G, Moudgil R, Nakanishi T, Rebeyka I, Thébaud B, Michelakis ED, Archer SL. Oxygen activates the Rho/Rho-kinase pathway and induces RhoB and ROCK-1 expression in human and rabbit ductus arteriosus by increasing mitochondria-derived reactive oxygen species: a newly recognized mechanism for sustaining ductal constriction. Circulation 2007; 115:1777-88. [PMID: 17353442 DOI: 10.1161/circulationaha.106.649566] [Citation(s) in RCA: 114] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Constriction of the ductus arteriosus (DA) is initiated at birth by inhibition of O2-sensitive K+ channels in DA smooth muscle cells. Subsequent membrane depolarization and calcium influx through L-type calcium channels initiates functional closure. We hypothesize that Rho-kinase activation is an additional mechanism that sustains DA constriction. METHODS AND RESULTS The effect of increased PO2 on the activity and expression of Rho-kinase was assessed in DAs from neonates with hypoplastic left-heart syndrome (n=15) and rabbits (339 term and 99 preterm rabbits). Rho-kinase inhibitors (Y-27632 and fasudil) prevent and reverse O2 constriction. Heterogeneity exists in the sensitivity of constrictors (PO2=endothelin=phenylephrine>KCl) and of fetal vessels (DA=pulmonary artery>aorta) to Rho-kinase inhibition. Inhibition of L-type calcium channels (nifedipine) or removal of extracellular calcium inhibits approximately two thirds of O2 constriction. Residual DA constriction reflects calcium sensitization, which persists after removal of extracellular calcium and blocking of sarcoplasmic reticulum Ca2+-ATPase. In term DA, an increase in PO2 activates Rho-kinase and thereby increases RhoB and ROCK-1 expression. Activation of Rho-kinase in DA smooth muscle cells is initiated by a PO2-dependent, rotenone-sensitive increase in mitochondrion-derived reactive O2 species. O2 effects on Rho-kinase are mimicked by exogenous H2O2. In preterm DAs, immaturity of mitochondrial reactive oxygen species generation is associated with reduced and delayed O2 constriction and lack of PO2-dependent upregulation of Rho-kinase expression. CONCLUSIONS O2 activates Rho-kinase and increases Rho-kinase expression in term DA smooth muscle cells by a redox-regulated, positive-feedback mechanism that promotes sustained vasoconstriction. Conversely, Rho-kinase inhibitors may be useful in maintaining DA patency, as a bridge to congenital heart surgery.
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Affiliation(s)
- Hidemi Kajimoto
- Vascular Biology Group, Alberta Cardiovascular and Stroke Research Centre (ABACUS), University of Alberta, Edmonton, Canada
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Abstract
BACKGROUND The basic mechanisms of thromboembolism in cyanotic congenital heart disease (CCHD) have not been well clarified. P-selectin on the platelets reflects platelet activation. Thrombomodulin is a critical cofactor for thrombin-mediated activation of protein C and reflects the anticoagulant activity of the endothelium. The present study was performed to evaluate whether platelet activation exists in patients with CCHD. METHODS AND RESULTS Platelet P-selectin as a marker of platelet activation, plasma thrombomodulin level and protein C activity as markers of anticoagulant activity of the endothelium and thrombin - antithrombin complex III (TAT) were examined in 35 patients with CCHD. Plasma thrombomodulin level (1.1+/-0.9 vs 2.2+/-0.3 FU/ml) and protein C activity (71.1+/-29.8 vs 117.8+/-24.8%) were significantly lower in patients with CCHD as compared with the control subjects. The levels of plasma TAT (255+/-811 vs 1.9+/-0.9 ng/ml) and P-selectin on platelets (6.3 +/-4.5 vs 3.3+/-0.3 mean fluorescence intensity) were significantly higher in the patients with CCHD than in the controls. Four of the CCHD patients who experienced thromboembolic events had elevated levels of platelet P-selectin (p=0.02) compared with CCHD patients without thromboembolic events. CONCLUSION Platelet activation exists in patients with CCHD and it may play an important role in the thromboembolic events in CCHD.
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Affiliation(s)
- Hidemi Kajimoto
- Department of Pediatric Cardiology, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo 162-8666, Japan
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Kajimoto H, Ishigaki K, Okumura K, Tomimatsu H, Nakazawa M, Saito K, Osawa M, Nakanishi T. Beta-blocker therapy for cardiac dysfunction in patients with muscular dystrophy. Circ J 2006; 70:991-4. [PMID: 16864930 DOI: 10.1253/circj.70.991] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
BACKGROUND In muscular dystrophy, cardiac function deteriorates with time and heart failure is one of the major causes of death. Although the combination of angiotensin-converting enzyme inhibitors (ACEI) and beta-blockers improves cardiac function in adults, little is known about the efficacy of those drugs in patients with muscular dystrophy. METHODS AND RESULTS The effect of the beta-blocker, carvedilol, and/or ACEI on ventricular function in patients with muscular dystrophy was studied. Carvedilol and an ACEI were given to 13 patients (ACEI group; mean age 18 years, range 7-27 years), and an ACEI only to 15 patients (carvedilol group; mean age 15 years, range 8-29 years). Diagnoses included Duchenne muscular dystrophy (n=25), Fukuyama muscular dystrophy (n=2), and Emery-Dreifuss muscular dystrophy (n=1). Echocardiographic parameters of the left ventricle were measured during the 2-3 years of follow-up. In the carvedilol group, combination therapy of carvedilol and an ACEI for 2 years resulted in a significant increase in left ventricular fractional shortening (LVFS). In the ACEI group, there was no significant change in LVFS. Left ventricular end-diastolic dimension increased in the ACEI group, but not in the carvedilol group. CONCLUSION Carvedilol plus an ACEI improves left ventricular systolic function in patients with muscular dystrophy.
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Affiliation(s)
- Hidemi Kajimoto
- Department of Pediatric Cardiology, Tokyo Women's Medical University, Japan
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Abstract
[reaction: see text] When carbonyl compounds were allowed to react with phenyl trimethylsilyl selenide and tributylstannyl hydride in the presence of a catalytic amount of AIBN as a radical initiator, the hydrosilylation of the carbonyl compounds efficiently proceeded to give the corresponding silyl ethers in moderate to good yields.
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Affiliation(s)
- Y Nishiyama
- Department of Applied Chemistry, Faculty of Engineering, Kansai University, Suita, Osaka 564-8680, Japan.
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Kajimoto H, Naya M, Hojo M, Hibi S, Imashuku S. [Relapse of acute lymphoblastic leukemia as a retro-orbital mass]. Rinsho Ketsueki 1999; 40:1193-7. [PMID: 10624131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
A 16-year-old girl who had been treated for B-precursor acute lymphoblastic leukemia (ALL) presented with a mass in the left orbit as an isolated relapse. Five years earlier, she had undergone chemotherapy that promptly resulted in a complete remission. For prophylaxis of central nervons system leukemia, the patient received cranial radiotherapy (18 Gy) with shielding of the orbit and 15 cycles of intrathecal MTX and prednisolone. Cerebrospinal fluid analysis did not detect infiltration during the treatment course. Exophthalmos of the eft eye and hyperemia of the conjuctiva developed 15 months after therapy. Computed tomography showed a retro-orbital mass behind the left eye. Though bone marrow aspiration was negative, biopsy specimens from the mass disclosed the infiltration of CD10-positive leukemic blasts. After 8 courses of chemotherapy, 5 cycles of intrathecal MTX, and orbital irradiation (24 Gy), the mass disappeared. All relapse as an isolated retro-orbital mass is very rare, and only 3 cases have been reported to date.
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