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  • 1
    In: Respiratory Investigation, Elsevier BV, Vol. 60, No. 4 ( 2022-07), p. 446-495
    Type of Medium: Online Resource
    ISSN: 2212-5345
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2022
    detail.hit.zdb_id: 2660821-2
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  • 2
    In: Surgery Today, Springer Science and Business Media LLC, Vol. 52, No. 10 ( 2022-10), p. 1446-1452
    Type of Medium: Online Resource
    ISSN: 0941-1291 , 1436-2813
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2022
    detail.hit.zdb_id: 1463169-6
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  • 3
    In: Journal of Intensive Care, Springer Science and Business Media LLC, Vol. 10, No. 1 ( 2022-07-08)
    Abstract: The joint committee of the Japanese Society of Intensive Care Medicine/Japanese Respiratory Society/Japanese Society of Respiratory Care Medicine on ARDS Clinical Practice Guideline has created and released the ARDS Clinical Practice Guideline 2021. Methods The 2016 edition of the Clinical Practice Guideline covered clinical questions (CQs) that targeted only adults, but the present guideline includes 15 CQs for children in addition to 46 CQs for adults. As with the previous edition, we used a systematic review method with the Grading of Recommendations Assessment Development and Evaluation (GRADE) system as well as a degree of recommendation determination method. We also conducted systematic reviews that used meta-analyses of diagnostic accuracy and network meta-analyses as a new method. Results Recommendations for adult patients with ARDS are described: we suggest against using serum C-reactive protein and procalcitonin levels to identify bacterial pneumonia as the underlying disease (GRADE 2D); we recommend limiting tidal volume to 4–8 mL/kg for mechanical ventilation (GRADE 1D); we recommend against managements targeting an excessively low SpO 2 (PaO 2 ) (GRADE 2D); we suggest against using transpulmonary pressure as a routine basis in positive end-expiratory pressure settings (GRADE 2B); we suggest implementing extracorporeal membrane oxygenation for those with severe ARDS (GRADE 2B); we suggest against using high-dose steroids (GRADE 2C); and we recommend using low-dose steroids (GRADE 1B). The recommendations for pediatric patients with ARDS are as follows: we suggest against using non-invasive respiratory support (non-invasive positive pressure ventilation/high-flow nasal cannula oxygen therapy) (GRADE 2D), we suggest placing pediatric patients with moderate ARDS in the prone position (GRADE 2D), we suggest against routinely implementing NO inhalation therapy (GRADE 2C), and we suggest against implementing daily sedation interruption for pediatric patients with respiratory failure (GRADE 2D). Conclusions This article is a translated summary of the full version of the ARDS Clinical Practice Guideline 2021 published in Japanese (URL: https://www.jsicm.org/publication/guideline.html ). The original text, which was written for Japanese healthcare professionals, may include different perspectives from healthcare professionals of other countries.
    Type of Medium: Online Resource
    ISSN: 2052-0492
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2022
    detail.hit.zdb_id: 2739853-5
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  • 4
    In: Circulation, Ovid Technologies (Wolters Kluwer Health), Vol. 138, No. 21 ( 2018-11-20), p. 2413-2433
    Abstract: Thoracic aortic aneurysm (TAA) and dissection are fatal diseases that cause aortic rupture and sudden death. The small GTP-binding protein GDP dissociation stimulator (SmgGDS) is a crucial mediator of the pleiotropic effects of statins. Previous studies revealed that reduced force generation in aortic smooth muscle cells (AoSMCs) causes TAA and thoracic aortic dissection. Methods: To examine the role of SmgGDS in TAA formation, we used an angiotensin II (1000 ng·min −1 ·kg −1 , 4 weeks)–induced TAA model. Results: We found that 33% of Apoe −/− SmgGDS +/− mice died suddenly as a result of TAA rupture, whereas there was no TAA rupture in Apoe −/− control mice. In contrast, there was no significant difference in the ratio of abdominal aortic aneurysm rupture between the 2 genotypes. We performed ultrasound imaging every week to follow up the serial changes in aortic diameters. The diameter of the ascending aorta progressively increased in Apoe −/− SmgGDS +/− mice compared with Apoe −/− mice, whereas that of the abdominal aorta remained comparable between the 2 genotypes. Histological analysis of Apoe −/− SmgGDS +/− mice showed dissections of major thoracic aorta in the early phase of angiotensin II infusion (day 3 to 5) and more severe elastin degradation compared with Apoe −/− mice. Mechanistically, Apoe −/− SmgGDS +/− mice showed significantly higher levels of oxidative stress, matrix metalloproteinases, and inflammatory cell migration in the ascending aorta compared with Apoe −/− mice. For mechanistic analyses, we primary cultured AoSMCs from the 2 genotypes. After angiotensin II (100 nmol/L) treatment for 24 hours, Apoe −/− SmgGDS +/− AoSMCs showed significantly increased matrix metalloproteinase activity and oxidative stress levels compared with Apoe −/− AoSMCs. In addition, SmgGDS deficiency increased cytokines/chemokines and growth factors in AoSMCs. Moreover, expressions of fibrillin-1 ( FBN1 ), α-smooth muscle actin ( ACTA2 ), myosin-11 ( MYH11 ), MYLLK , and PRKG1 , which are force generation genes, were significantly reduced in Apoe −/− SmgGDS +/− AoSMCs compared with Apoe −/− AoSMCs. A similar tendency was noted in AoSMCs from patients with TAA compared with those from control subjects. Finally, local delivery of the SmgGDS gene construct reversed the dilation of the ascending aorta in Apoe −/− SmgGDS +/− mice. Conclusions: These results suggest that SmgGDS is a novel therapeutic target for the prevention and treatment of TAA.
    Type of Medium: Online Resource
    ISSN: 0009-7322 , 1524-4539
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2018
    detail.hit.zdb_id: 1466401-X
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  • 5
    In: Circulation, Ovid Technologies (Wolters Kluwer Health), Vol. 146, No. Suppl_1 ( 2022-11-08)
    Abstract: The right ventricle (RV) function plays a crucial role in the prognosis and functional outcome of PAH (Pulmonary Arterial Hypertension) patients. However, RV remodeling and its underlying mechanisms in PAH, and the molecular phenotype of RV in different disease conditions are poorly understood. Therefore, we designed this study to deeply investigate molecular changes underlying right ventricular remodeling and dysfunction in PAH. To this aim, we generated RNA-seq data from 40 patients' RV tissues, clinically classified in adaptive versus maladaptive RV hypertrophy. Using an unsupervised clustering-based analysis, we identified “early” and “late” subgroups in both diseased RV states, associated with patients’ hemodynamic profiles. We then demonstrated that the compensated RV is characterized by an upregulation of cell cycle-associated genes and mitochondrial respiration, whereas excessive levels of extracellular matrix components were central in the decompensation phase. However, dysregulation of fatty acid β-oxidation characterized the early decompensation phase. Furthermore, a comparative analysis from 30 RV samples of monocrotaline (MCT)-induced rat model largely confirmed the stage-specific molecular phenotypes, along with subgroups identification. Finally, we assessed the circulating levels of several dysregulated proteins in two independent cohorts of PAH patients and introduced a panel of five ECM-related proteins that had a significant alteration in patients with compensated vs. decompensated RV in both cohorts. Among those, NID1, C1QTNF1, and CRTAC1 demonstrated higher importance in predicting the development of maladaptive RV hypertrophy in both cohorts, while the correlation of their expression with cardiac functions confirmed their potential biomarker capacity in the prognosis of PAH-associated RV hypertrophy and failure. In conclusion, this comprehensive transcriptome study revealed new subgroups of human RV hypertrophy beyond the clinical measurements, while combination with proteome analysis proposed a panel of potential PAH biomarkers related to patients' RV function. Furthermore, our comparative analysis of two species supports the relevance of current animal models to explore new targets.
    Type of Medium: Online Resource
    ISSN: 0009-7322 , 1524-4539
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2022
    detail.hit.zdb_id: 1466401-X
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  • 6
    In: Circulation, Ovid Technologies (Wolters Kluwer Health), Vol. 144, No. Suppl_1 ( 2021-11-16)
    Abstract: Introduction: Right ventricular (RV) function is the poor prognosis factor in pulmonary arterial hypertension (PAH) patients. Inflammation, oxidative DNA damage, and glycolysis are key triggering pathways that induce cardiomyocytes (CM) dysfunction. Oxidative DNA damage-dependent Poly (ADP ribose) Polymerase 1 (PARP1) activation was documented to promote glycolysis and inflammation through nuclear retention of Pyruvate Kinase Muscle isozyme 2 (PKM2). Despite PARP1/PKM2 axis is involved in many pathologies, their role in RV failure (RVF) remains unclear. We hypothesized that sustained PARP1 activation induces nuclear PKM2 localization, cardiac inflammation, and myocytes apoptosis resulting in transition from compensated (cRV) to decompensated RV (dRV). Methods and Results: We found that PARP1/PKM2 expression/activity (IF, WB) is upregulated in dRV patients (died of RVF, n=11) compared to cRV patients (CI 〉 2.2, n=12) and control donors (n=19). Similar findings were seen in two rat models of RVF (monocrotaline, PA banding). In vitro , we confirmed that oxidative DNA damage (ET-1+H 2 O 2 ) as well as inflammatory stress (ET-1+LPS) induced nuclear expression of PARP1/PKM2 (IF, WB) leading to inflammation (NF-κB nuclear translocation) and CM death (TUNEL). These effects were prevented by treatment with PARP1 inhibitor (ABT-888, Olaparib) or enforced cytosolic retention of PKM2 (TEPP-46, DASA-58). Cardiomyocytes isolated from neonatal Parp1 deficient mice were resistant to myocyte dysfunction (PKM2 nuclear upregulation, NF-κB nuclear translocation, TUNEL) induced by oxidative DNA damage (ET-1+H 2 O 2 ). In vivo , Olaparib (10mg/kg) as well as TEPP-46 (25mg/kg) prevented RVF (CO, hypertrophy, fibrosis, inflammation, DNA damage, apoptosis) induced by PAB in rats (n=8~12 per group). Moreover, we confirmed that global Parp1 loss-of-function confers protection against PAB induced-RVF (CO, hypertrophy, fibrosis, inflammation, DNA damage, apoptosis, n=10 per group). (All p 〈 0.05) Conclusions: We demonstrated for the first time that PARP1/PKM2 axis is a critical signal pathway RV decompensation. Targeting PARP1/PKM2 axis may represent a promising avenue for tackling maladaptive RV remodeling and pulmonary circulation, simultaneously.
    Type of Medium: Online Resource
    ISSN: 0009-7322 , 1524-4539
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2021
    detail.hit.zdb_id: 1466401-X
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  • 7
    In: Arteriosclerosis, Thrombosis, and Vascular Biology, Ovid Technologies (Wolters Kluwer Health), Vol. 34, No. suppl_1 ( 2014-05)
    Abstract: Background: Cyclophilin A (CyPA) is secreted from vascular smooth muscle cells (VSMC) by oxidative stress and promotes VSMC proliferation. However, the role of CyPA and its extracellular receptor Basigin (Bsg) in the pathogenesis of pulmonary hypertension (PH) remains to be elucidated. In this study, we tested our hypothesis that CyPA/Bsg signaling promotes the development of PH. Methods and Results: In the pulmonary arteries of PH patients, immunostaining revealed strong expression of CyPA and Bsg (n=5). In cultured human pulmonary arterial VSMC, hypoxia (O 2 2%) significantly increased CyPA secretion and Bsg expression compared with normoxic condition (O 2 21%) (n=4 per group). To determine the role of CyPA/Bsg signaling in PH development, CyPA +/- and Bsg +/- mice were exposed to hypoxia (O 2 10%) for 4 weeks. The pulmonary arteries (PA) of CyPA +/- and Bsg +/- mice exposed to normoxia did not differ in morphology compared with their littermate controls. In contrast, CyPA +/- (n=12) and Bsg +/- mice (n=15) exposed to hypoxia revealed significantly reduced right ventricular systolic pressure (RVSP), PA remodeling and RV hypertrophy compared with their littermate controls (all P 〈 0.01). Importantly, after transplantation of bone marrow, the severity of PH was still exacerbated in Bsg +/+ recipient mice compared with Bsg +/- recipient mice regardless of the source of bone marrow (Bsg +/+ or Bsg +/- ), suggesting the crucial role of Bsg in PA. To further evaluate the role of Bsg, we harvested VSMC from Bsg +/+ and Bsg +/− mice. VSMC proliferation was significantly reduced in Bsg +/− compared with Bsg +/+ in response to 2% FBS, suggesting the crucial role of Bsg in VSMC proliferation. Mechanistic studies demonstrated that Bsg +/- VSMC revealed reduced expression of oxidative stress genes, less secretion of cytokines/chemokines and growth factors. Finally, in the clinical study, plasma CyPA levels in PH patients were increased in accordance with the severity of pulmonary vascular resistance (P 〈 0.001). Furthermore, event-free curve revealed that high plasma CyPA levels predicted poor outcome in PH patients (death or lung transplantation, P 〈 0.001). Conclusions: These results indicate the crucial role of extracellular CyPA and vascular Bsg in the pathogenesis of PH.
    Type of Medium: Online Resource
    ISSN: 1079-5642 , 1524-4636
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2014
    detail.hit.zdb_id: 1494427-3
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  • 8
    In: Arteriosclerosis, Thrombosis, and Vascular Biology, Ovid Technologies (Wolters Kluwer Health), Vol. 38, No. Suppl_1 ( 2018-05)
    Abstract: Background: Thoracic aortic aneurysm (TAA) and dissection (TAD) are fatal diseases, which cause aortic rupture and sudden death. The small GTP-binding protein GDP dissociation stimulator (SmgGDS) is a crucial mediator of the pleiotropic effects of statins. Previous studies revealed that reduced force generation in AoSMCs causes TAA and TAD. Methods and Results: To examine the role of SmgGDS in TAA formation, we employed an angiotensin II (AngII, 1,000 ng/min/kg, 4weeks)-induced TAA model in Apoe -/- SmgGDS +/- mice, in which 33% died suddenly due to TAA rupture, whereas there was no TAA rupture in Apoe -/- control mice. In contrast, there was no significant difference in the ratio of AAA rupture between the two genotypes. We performed ultrasound imaging every week to follow the serial changes in aortic diameters. The diameter of the ascending aorta progressively increased in Apoe -/- SmgGDS +/- mice compared with Apoe -/- mice, whereas that of the abdominal aorta remained comparable between the two genotypes. Histological analysis of Apoe -/- SmgGDS +/- mice showed dissections of major thoracic aorta in the early phase of AngII infusion (day 3~5) and more severe elastin degradation compared with Apoe -/- mice. Mechanistically, Apoe -/- SmgGDS +/- mice showed significantly higher levels of oxidative stress, matrix metalloproteinases, and inflammatory cell migration in the ascending aorta compared with Apoe -/- mice. For mechanistic analyses, we primary cultured AoSMCs from the 2 genotypes. After AngII (100 nM) treatment for 24 hours, Apoe -/- SmgGDS +/- AoSMCs showed significantly increased MMP activity and oxidative stress levels compared with Apoe -/- AoSMCs. In addition, SmgGDS deficiency increased cytokines/chemokines and growth factors in AoSMCs. Moreover, expressions of FBN1 , ACTA2 , MYH11 , MLK and PRKG1 , which are force generation genes, were significantly reduced in Apoe -/- SmgGDS +/- AoSMCs compared with Apoe -/- AoSMCs. Similar tendency was noted in AoSMCs from TAA patients compared with those from controls. Finally, local delivery of the SmgGDS gene construct reversed the dilation of the ascending aorta in Apoe -/- SmgGDS +/- mice. Conclusions: These results suggest that SmgGDS is a novel therapeutic target for the prevention and treatment of TAA.
    Type of Medium: Online Resource
    ISSN: 1079-5642 , 1524-4636
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2018
    detail.hit.zdb_id: 1494427-3
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  • 9
    In: Arteriosclerosis, Thrombosis, and Vascular Biology, Ovid Technologies (Wolters Kluwer Health), Vol. 39, No. 11 ( 2019-11), p. 2367-2385
    Abstract: Excessive proliferation and apoptosis resistance are special characteristics of pulmonary artery smooth muscle cells (PASMCs) in pulmonary arterial hypertension (PAH). However, the drugs in clinical use for PAH target vascular dilatation, which do not exert adequate effects in patients with advanced PAH. Here, we report a novel therapeutic effect of emetine, a principal alkaloid extracted from the root of ipecac clinically used as an emetic and antiprotozoal drug. Approach and Results: We performed stepwise screenings for 5562 compounds from original library. First, we performed high-throughput screening with PASMCs from patients with PAH (PAH-PASMCs) and found 80 compounds that effectively inhibited proliferation. Second, we performed the repeatability and counter assay. Finally, we performed a concentration-dependent assay and found that emetine inhibits PAH-PASMC proliferation. Interestingly, emetine significantly reduced protein levels of HIFs (hypoxia-inducible factors; HIF-1α and HIF-2α) and downstream PDK1 (pyruvate dehydrogenase kinase 1). Moreover, emetine significantly reduced the protein levels of RhoA (Ras homolog gene family, member A), Rho-kinases (ROCK1 and ROCK2 [rho-associated coiled-coil containing protein kinases 1 and 2]), and their downstream CyPA (cyclophilin A), and Bsg (basigin) in PAH-PASMCs. Consistently, emetine treatment significantly reduced the secretion of cytokines/chemokines and growth factors from PAH-PASMCs. Interestingly, emetine reduced protein levels of BRD4 (bromodomain-containing protein 4) and downstream survivin, both of which are involved in many cellular functions, such as cell cycle, apoptosis, and inflammation. Finally, emetine treatment ameliorated pulmonary hypertension in 2 experimental rat models, accompanied by reduced inflammatory changes in the lungs and recovered right ventricular functions. Conclusions: Emetine is an old but novel drug for PAH that reduces excessive proliferation of PAH-PASMCs and improves right ventricular functions.
    Type of Medium: Online Resource
    ISSN: 1079-5642 , 1524-4636
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2019
    detail.hit.zdb_id: 1494427-3
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  • 10
    In: Arteriosclerosis, Thrombosis, and Vascular Biology, Ovid Technologies (Wolters Kluwer Health), Vol. 41, No. 3 ( 2021-03), p. 1205-1217
    Abstract: Pulmonary arterial hypertension is characterized by abnormal proliferation of pulmonary artery smooth muscle cells and vascular remodeling, which leads to right ventricular (RV) failure. Bsg (Basigin) is a transmembrane glycoprotein that promotes myofibroblast differentiation, cell proliferation, and matrix metalloproteinase activation. CyPA (cyclophilin A) binds to its receptor Bsg and promotes pulmonary artery smooth muscle cell proliferation and inflammatory cell recruitment. We previously reported that Bsg promotes cardiac fibrosis and failure in the left ventricle in response to pressure-overload in mice. However, the roles of Bsg and CyPA in RV failure remain to be elucidated. Approach and Results: First, we found that protein levels of Bsg and CyPA were upregulated in the heart of hypoxia-induced pulmonary hypertension (PH) in mice and monocrotaline-induced PH in rats. Furthermore, cardiomyocyte-specific Bsg-overexpressing mice showed exacerbated RV hypertrophy, fibrosis, and dysfunction compared with their littermates under chronic hypoxia and pulmonary artery banding. Treatment with celastrol, which we identified as a suppressor of Bsg and CyPA by drug screening, decreased proliferation, reactive oxygen species, and inflammatory cytokines in pulmonary artery smooth muscle cells. Furthermore, celastrol treatment ameliorated RV systolic pressure, hypertrophy, fibrosis, and dysfunction in hypoxia-induced PH in mice and SU5416/hypoxia-induced PH in rats with reduced Bsg, CyPA, and inflammatory cytokines in the hearts and lungs. Conclusions: These results indicate that elevated Bsg in pressure-overloaded RV exacerbates RV dysfunction and that celastrol ameliorates RV dysfunction in PH model animals by suppressing Bsg and its ligand CyPA. Thus, celastrol can be a novel drug for PH and RV failure that targets Bsg and CyPA. Graphic Abstract: A graphic abstract is available for this article.
    Type of Medium: Online Resource
    ISSN: 1079-5642 , 1524-4636
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2021
    detail.hit.zdb_id: 1494427-3
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