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Miyazaki T, Taguchi S, Obata N, Mizobuchi S. Severe hypotension and postoperative cardiac arrest caused by 5-aminolevulinic acid: a case report. J Med Case Rep 2024; 18:264. [PMID: 38811941 PMCID: PMC11137901 DOI: 10.1186/s13256-024-04589-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Accepted: 05/15/2024] [Indexed: 05/31/2024] Open
Abstract
BACKGROUND Although 5-aminolevulinic acid is useful for the photodynamic diagnosis of bladder tumors, it often causes severe intraoperative hypotension. We report a case of postoperative cardiac arrest in addition to severe intraoperative hypotension, probably owing to the use of 5-aminolevulinic acid. CASE PRESENTATION An 81-year-old Japanese man was scheduled to undergo transurethral resection of bladder tumor. The patient took 5-aminolevulinic acid orally 2 hours before entering the operating room. After the induction of anesthesia, his blood pressure decreased to 47/33 mmHg. The patient's hypotension did not improve even after noradrenaline was administered. After awakening from anesthesia, the patient's systolic blood pressure increased to approximately 100 mmHg, but approximately 5 hours after returning to the ward, cardiac arrest occurred for approximately 12 seconds. CONCLUSION We experienced a case of postoperative cardiac arrest in a patient, probably owing to the use of 5-aminolevulinic acid. Although the cause of cardiac arrest is unknown, perioperative hemodynamic management must be carefully performed in patients taking 5-aminolevulinic acid.
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Affiliation(s)
- Taishi Miyazaki
- Department of Anesthesiology, Kobe University Hospital, 7-5-1 Kusunoki-Cho, Chuo-ku, Kobe, Hyogo, 650-0017, Japan
| | - Shinya Taguchi
- Department of Anesthesiology, Kobe University Hospital, 7-5-1 Kusunoki-Cho, Chuo-ku, Kobe, Hyogo, 650-0017, Japan.
| | - Norihiko Obata
- Department of Anesthesiology, Kobe University Hospital, 7-5-1 Kusunoki-Cho, Chuo-ku, Kobe, Hyogo, 650-0017, Japan
| | - Satoshi Mizobuchi
- Department of Anesthesiology, Kobe University Hospital, 7-5-1 Kusunoki-Cho, Chuo-ku, Kobe, Hyogo, 650-0017, Japan
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2
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Ishikawa Y, Tanaka H, Fujiwara M, Nakamura Y, Fukuda S, Waseda Y, Yoshida S, Yokoyama M, Fujii Y. Incidence and predictors of intraoperative hypotension during transurethral bladder tumor resection with oral 5-aminolevulinic acid. Int J Urol 2024; 31:238-244. [PMID: 37986203 DOI: 10.1111/iju.15341] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 10/30/2023] [Indexed: 11/22/2023]
Abstract
OBJECTIVES To analyze the incidence and risk factors of intraoperative hypotension related to photodynamic diagnosis-assisted transurethral resection of bladder tumor (PDD-TURBT) with oral 5-aminolevulinic acid (5-ALA). METHODS We retrospectively analyzed 487 patients with bladder tumors who underwent PDD-TURBT (n = 184) or conventional TURBT (conv-TURBT) (n = 303) between 2018 and 2021. Intraoperative hypotension was defined as hypotension requiring vasopressors during TURBT, and its incidence was compared between the two groups. Potential risk factors of intraoperative hypotension, including preoperative change in mean arterial pressure (MAP), were further investigated in patients receiving PDD-TURBT. RESULTS The median age was 72 years, 392 patients (81%) were male, and 203 (42%) had hypertension. TURBT was performed under general and spinal anesthesia in 76 (16%) and 411 (84%) patients, respectively. The incidence of intraoperative hypotension was significantly higher in PDD-TURBT compared to conv-TURBT (43% vs. 17%, respectively). The median change in MAP until the induction of anesthesia was +6.5 mmHg (range: -29.0 to +46.3) in the PDD-TURBT group and +14.7 mmHg (range: -35.3 to +67.7) in the conv-TURBT group, showing a significantly smaller increase in the PDD-TURBT group (p < 0.001). In the multivariable analysis for PDD-TURBT patients, advanced age, general anesthesia, and lower MAP change (<+6.5 mmHg) until anesthesia induction were significantly associated with intraoperative hypotension (p = 0.0104, <0.001, and <0.001, respectively). CONCLUSIONS Intraoperative hypotension occurred more frequently in patients who underwent PDD-TURBT than in those who underwent conv-TURBT. Using oral 5-ALA decreases preoperative blood pressure elevation and may be responsible for intraoperative hypotension.
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Affiliation(s)
- Yudai Ishikawa
- Department of Urology, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Hajime Tanaka
- Department of Urology, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Motohiro Fujiwara
- Department of Urology, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Yuki Nakamura
- Department of Urology, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Shohei Fukuda
- Department of Urology, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Yuma Waseda
- Department of Urology, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Soichiro Yoshida
- Department of Urology, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Minato Yokoyama
- Department of Urology, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Yasuhisa Fujii
- Department of Urology, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
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Alibayov B, Scasny A, Vidal AGJ, Murin L, Wong S, Edwards KS, Eichembaun Z, Punshon T, Jackson BP, Hopp MT, McDaniel LS, Akerley BJ, Imhof D, Vidal JE. Oxidation of hemoglobin in the lung parenchyma facilitates the differentiation of pneumococci into encapsulated bacteria. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.11.14.567109. [PMID: 38014009 PMCID: PMC10680745 DOI: 10.1101/2023.11.14.567109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Pneumococcal pneumonia causes cytotoxicity in the lung parenchyma but the underlying mechanism involves multiple factors contributing to cell death. Here, we discovered that hydrogen peroxide produced by Streptococcus pneumoniae (Spn-H 2 O 2 ) plays a pivotal role by oxidizing hemoglobin, leading to its polymerization and subsequent release of labile heme. At physiologically relevant levels, heme selected a population of encapsulated pneumococci. In the absence of capsule and Spn-H 2 O 2 , host intracellular heme exhibited toxicity towards pneumococci, thus acting as an antibacterial mechanism. Further investigation revealed that heme-mediated toxicity required the ABC transporter GlnPQ. In vivo experiments demonstrated that pneumococci release H 2 O 2 to cause cytotoxicity in bronchi and alveoli through the non-proteolytic degradation of intracellular proteins such as actin, tubulin and GAPDH. Overall, our findings uncover a mechanism of lung toxicity mediated by oxidative stress that favor the growth of encapsulated pneumococci suggesting a therapeutic potential by targeting oxidative reactions. Graphical abstract Highlights Oxidation of hemoglobin by Streptococcus pneumoniae facilitates differentiation to encapsulated pneumococci in vivo Differentiated S. pneumoniae produces capsule and hydrogen peroxide (Spn-H 2 O 2 ) as defense mechanism against host heme-mediated toxicity. Spn-H 2 O 2 -induced lung toxicity causes the oxidation and non-proteolytic degradation of intracellular proteins tubulin, actin, and GAPDH. The ABC transporter GlnPQ is a heme-binding complex that makes Spn susceptible to heme toxicity.
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Kondo Y, Nagamine Y, Yoshikawa N, Echigo N, Kida T, Sumitomo M, Yoshida M, Inagawa G, Goto T. Incidence of perioperative hypotension in patients undergoing transurethral resection of bladder tumor after oral 5-aminolevulinic acid administration: a retrospective multicenter cohort study. J Anesth 2023; 37:703-713. [PMID: 37422859 DOI: 10.1007/s00540-023-03222-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 06/30/2023] [Indexed: 07/11/2023]
Abstract
PURPOSE Tumors can be visualized using 5-Aminolevulinic acid hydrochloride (5-ALA) during transurethral resection of bladder tumors (TURBT). Hypotension is an adverse effect of 5-ALA; however, its incidence and morbidity rates are unknown. This study aimed to describe the incidence of perioperative hypotension and identify risk factors for hypotension among patients after 5-ALA administration in TURBT. METHODS This retrospective multicenter cohort study was conducted at three general hospitals in Japan. Adult patients who underwent elective TURBT after 5-ALA administration between April 2018 and August 2020 were included. The primary outcome was the incidence of perioperative hypotension (mean blood pressure < 65 mmHg). The secondary outcomes were the use of vasoactive agents and adverse events, including urgent intensive care unit (ICU) admission. Multivariate logistic regression analysis was performed to investigate risk factors of the incidence of intraoperative hypotension. RESULTS The median age of 261 patients was 73 years. General anesthesia was induced in 252 patients. The intraoperative hypotension was observed in 246 (94.3%) patients. Three patients (1.1%) were urgently admitted to the ICU for continued vasoactive agent use after surgery. All three patients had renal dysfunction. Multivariate logistic regression analysis revealed that general anesthesia was significantly associated with intraoperative hypotension (adjusted odds ratio, 17.94; 95% confidence interval, 3.21-100.81). CONCLUSION The incidence of hypotension in patients undergoing TURBT after 5-ALA administration was 94.3%. The incidence of urgent ICU admission with prolonged hypotension was 1.1% in all patients with renal dysfunction. General anesthesia was significantly associated with intraoperative hypotension.
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Affiliation(s)
- Yuriko Kondo
- Department of Anesthesiology, Yokohama Rosai Hospital, 3211 Kodukuecho, Kouhoku-Ku, Yokohama, Kanagawa, 222-0036, Japan
| | - Yusuke Nagamine
- Department of Anesthesiology and Critical Care Medicine, Yokohama City University Hospital, 3-9 Fukuura, Kanazawa-Ku, Yokohama, Kanagawa, 236-0004, Japan.
| | - Nanako Yoshikawa
- Department of Anesthesiology, Yokohama Rosai Hospital, 3211 Kodukuecho, Kouhoku-Ku, Yokohama, Kanagawa, 222-0036, Japan
| | - Noriyuki Echigo
- Department of Anesthesiology, Yokohama Rosai Hospital, 3211 Kodukuecho, Kouhoku-Ku, Yokohama, Kanagawa, 222-0036, Japan
| | - Tatsuya Kida
- Department of Anesthesiology, Yokosuka Kyosai Hospital, 1-16 Yonegahama-Dori, Yokosuka, Kanagawa, 238-8558, Japan
| | - Masakazu Sumitomo
- Department of Anesthesiology, Yokosuka Kyosai Hospital, 1-16 Yonegahama-Dori, Yokosuka, Kanagawa, 238-8558, Japan
| | - Megumi Yoshida
- Department of Anesthesiology, Yokohama Municipal Citizen's Hospital, 1-1 Mitsuzawa Nishimachi, Kanagawa-Ku, Yokohama, Kanagawa, 221-0855, Japan
| | - Gaku Inagawa
- Department of Anesthesiology, Yokohama Municipal Citizen's Hospital, 1-1 Mitsuzawa Nishimachi, Kanagawa-Ku, Yokohama, Kanagawa, 221-0855, Japan
| | - Takahisa Goto
- Department of Anesthesiology and Critical Care Medicine, Yokohama City University Hospital, 3-9 Fukuura, Kanazawa-Ku, Yokohama, Kanagawa, 236-0004, Japan
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5
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Nozawa N, Noguchi M, Shinno K, Saito T, Asada A, Ishii T, Takahashi K, Ishizuka M, Ando K. 5-Aminolevulinic acid bypasses mitochondrial complex I deficiency and corrects physiological dysfunctions in Drosophila. Hum Mol Genet 2023; 32:2611-2622. [PMID: 37364055 PMCID: PMC10407699 DOI: 10.1093/hmg/ddad092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 04/15/2023] [Accepted: 06/15/2023] [Indexed: 06/28/2023] Open
Abstract
Complex I (CI) deficiency in mitochondrial oxidative phosphorylation (OXPHOS) is the most common cause of mitochondrial diseases, and limited evidence-based treatment options exist. Although CI provides the most electrons to OXPHOS, complex II (CII) is another entry point of electrons. Enhancement of this pathway may compensate for a loss of CI; however, the effects of boosting CII activity on CI deficiency are unclear at the animal level. 5-Aminolevulinic acid (5-ALA) is a crucial precursor of heme, which is essential for CII, complex III, complex IV (CIV) and cytochrome c activities. Here, we show that feeding a combination of 5-ALA hydrochloride and sodium ferrous citrate (5-ALA-HCl + SFC) increases ATP production and suppresses defective phenotypes in Drosophila with CI deficiency. Knockdown of sicily, a Drosophila homolog of the critical CI assembly protein NDUFAF6, caused CI deficiency, accumulation of lactate and pyruvate and detrimental phenotypes such as abnormal neuromuscular junction development, locomotor dysfunctions and premature death. 5-ALA-HCl + SFC feeding increased ATP levels without recovery of CI activity. The activities of CII and CIV were upregulated, and accumulation of lactate and pyruvate was suppressed. 5-ALA-HCl + SFC feeding improved neuromuscular junction development and locomotor functions in sicily-knockdown flies. These results suggest that 5-ALA-HCl + SFC shifts metabolic programs to cope with CI deficiency. Bullet outline 5-Aminolevulinic acid (5-ALA-HCl + SFC) increases ATP production in flies with complex I deficiency.5-ALA-HCl + SFC increases the activities of complexes II and IV.5-ALA-HCl + SFC corrects metabolic abnormalities and suppresses the detrimental phenotypes caused by complex I deficiency.
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Affiliation(s)
- Naoko Nozawa
- Department of Biological Sciences, Graduate School of Science, Tokyo Metropolitan University, Tokyo 192-0397, Japan
- Division of Pharmaceutical Research, SBI Pharmaceuticals Co., Ltd, Tokyo 106-6020, Japan
| | - Marie Noguchi
- Department of Biological Sciences, Graduate School of Science, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - Kanako Shinno
- Department of Biological Sciences, Graduate School of Science, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - Taro Saito
- Department of Biological Sciences, Graduate School of Science, Tokyo Metropolitan University, Tokyo 192-0397, Japan
- Department of Biological Sciences, School of Science, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - Akiko Asada
- Department of Biological Sciences, Graduate School of Science, Tokyo Metropolitan University, Tokyo 192-0397, Japan
- Department of Biological Sciences, School of Science, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - Takuya Ishii
- Division of Pharmaceutical Research, SBI Pharmaceuticals Co., Ltd, Tokyo 106-6020, Japan
- Medical- Engineering Collaboration and Innovation Office, National Cancer Center Hospital East, 6-5-1 Kashinoha, Kashiwa, Chiba 277-8577, Japan
| | - Kiwamu Takahashi
- Division of Pharmaceutical Research, SBI Pharmaceuticals Co., Ltd, Tokyo 106-6020, Japan
| | - Masahiro Ishizuka
- Division of Pharmaceutical Research, SBI Pharmaceuticals Co., Ltd, Tokyo 106-6020, Japan
| | - Kanae Ando
- Department of Biological Sciences, Graduate School of Science, Tokyo Metropolitan University, Tokyo 192-0397, Japan
- Department of Biological Sciences, School of Science, Tokyo Metropolitan University, Tokyo 192-0397, Japan
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Kitamura N, Zhang S, Morel JD, Nagano U, Taworntawat T, Hosoda S, Nakamura A, Ogawa Y, Benegiamo G, Auwerx J, Tsubota K, Yokoyama Y, Watanabe M. Sodium ferrous citrate and 5-aminolevulinic acid improve type 2 diabetes by maintaining muscle and mitochondrial health. Obesity (Silver Spring) 2023; 31:1038-1049. [PMID: 36823345 DOI: 10.1002/oby.23705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 12/09/2022] [Accepted: 12/14/2022] [Indexed: 02/25/2023]
Abstract
OBJECTIVE Improving mitochondrial function is a promising strategy for intervention in type 2 diabetes mellitus. This study investigated the preventive effects of sodium ferrous citrate (SFC) and 5-aminolevulinic acid phosphate (ALA) on several metabolic dysfunctions associated with obesity because they have been shown to alleviate abnormal glucose metabolism in humans. METHODS Six-week-old male C57BL/6J mice were fed with a normal diet, a high-fat diet, or a high-fat diet supplemented with SFC and ALA for 15 weeks. RESULTS The simultaneous supplementation of SFC + ALA to high-fat diet-fed mice prevented loss of muscle mass, improved muscle strength, and reduced obesity and insulin resistance. SFC + ALA prevented abnormalities in mitochondrial morphology and reverted the diet effect on the skeletal muscle transcriptome, including the expression of glucose uptake and mitochondrial oxidative phosphorylation-related genes. In addition, SFC + ALA prevented the decline in mitochondrial DNA copy number by enhancing mitochondrial DNA maintenance and antioxidant transcription activity, both of which are impaired in high-fat diet-fed mice during long-term fasting. CONCLUSIONS These findings suggest that SFC + ALA supplementation exerts its preventive effects in type 2 diabetes mellitus via improved skeletal muscle and mitochondrial health, further validating its application as a promising strategy for the prevention of obesity-induced metabolic disorders.
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Affiliation(s)
- Naho Kitamura
- Systems Biology Program, Graduate School of Media and Governance, Keio University, Kanagawa, Japan
- Health Science Laboratory, Keio Research Institute at SFC, Kanagawa, Japan
| | - Shiyang Zhang
- Systems Biology Program, Graduate School of Media and Governance, Keio University, Kanagawa, Japan
- Health Science Laboratory, Keio Research Institute at SFC, Kanagawa, Japan
| | - Jean-David Morel
- Laboratory of Integrative and Systems Physiology, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Utana Nagano
- Systems Biology Program, Graduate School of Media and Governance, Keio University, Kanagawa, Japan
- Health Science Laboratory, Keio Research Institute at SFC, Kanagawa, Japan
| | - Tanon Taworntawat
- Systems Biology Program, Graduate School of Media and Governance, Keio University, Kanagawa, Japan
- Health Science Laboratory, Keio Research Institute at SFC, Kanagawa, Japan
| | - Shotaro Hosoda
- Systems Biology Program, Graduate School of Media and Governance, Keio University, Kanagawa, Japan
- Health Science Laboratory, Keio Research Institute at SFC, Kanagawa, Japan
| | - Anna Nakamura
- Systems Biology Program, Graduate School of Media and Governance, Keio University, Kanagawa, Japan
- Health Science Laboratory, Keio Research Institute at SFC, Kanagawa, Japan
| | - Yoko Ogawa
- Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| | - Giorgia Benegiamo
- Laboratory of Integrative and Systems Physiology, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Johan Auwerx
- Laboratory of Integrative and Systems Physiology, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Kazuo Tsubota
- Health Science Laboratory, Keio Research Institute at SFC, Kanagawa, Japan
- Tsubota Laboratory, Inc., Tokyo, Japan
| | - Yoko Yokoyama
- Systems Biology Program, Graduate School of Media and Governance, Keio University, Kanagawa, Japan
- Health Science Laboratory, Keio Research Institute at SFC, Kanagawa, Japan
| | - Mitsuhiro Watanabe
- Systems Biology Program, Graduate School of Media and Governance, Keio University, Kanagawa, Japan
- Health Science Laboratory, Keio Research Institute at SFC, Kanagawa, Japan
- Department of Environment and Information Studies, Keio University, Kanagawa, Japan
- Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan
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7
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Owada G, Nishizawa H, Matoyama Y, Watanabe E, Mitsuda K, Kaneko N, Kimura Y, Nanao T, Fujimoto J. Effect of Arginine Vasopressin on Intraoperative Hypotension Caused by Oral Administration of 5-Aminolevulinic Acid. Case Rep Anesthesiol 2023; 2023:1745373. [PMID: 37192960 PMCID: PMC10182879 DOI: 10.1155/2023/1745373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Revised: 04/01/2023] [Accepted: 04/12/2023] [Indexed: 05/18/2023] Open
Abstract
5-Aminolevulinic acid (5-ALA) is used for the photodynamic diagnosis of malignant tumors and has been effectively utilized to improve the complete resection rate and reduce the risk of tumor recurrence. However, intraoperative hypotension is a common adverse effect of oral 5-ALA, and it occasionally progresses to severe prolonged hypotension requiring high-dose catecholamine administration. We report a case of intraoperative hypotension due to oral 5-ALA in which arginine vasopressin (AVP) administration was effective for increasing the blood pressure. A 77-year-old man scheduled for a craniotomy for glioma was administered 5-ALA orally before surgery. After the induction of anesthesia, his blood pressure decreased substantially. Although we administered various vasopressor agents, hypotension was prolonged. However, after starting a continuous administration of AVP, the systolic blood pressure increased, and the hemodynamic parameters remained stable during the remainder of the operation. 5-ALA administration may lower blood pressure by inducing nitric oxide production, and AVP inhibits inducible nitric oxide synthase messenger RNA expression and interleukin-1β-stimulated nitric oxide production. In light of these mechanisms, AVP may be a reasonable treatment agent for hypotension induced by 5-ALA.
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Affiliation(s)
- Gen Owada
- Department of Intensive Care Medicine, Yokohama Rosai Hospital, Yokohama, Japan
| | - Hideo Nishizawa
- Department of Intensive Care Medicine, Yokohama Rosai Hospital, Yokohama, Japan
| | - Yuki Matoyama
- Department of Intensive Care Medicine, Yokohama Rosai Hospital, Yokohama, Japan
| | - Eri Watanabe
- Department of Intensive Care Medicine, Yokohama Rosai Hospital, Yokohama, Japan
| | - Keigo Mitsuda
- Department of Anesthesia, Yokohama Rosai Hospital, Yokohama, Japan
| | - Naoki Kaneko
- Department of Intensive Care Medicine, Yokohama Rosai Hospital, Yokohama, Japan
| | - Yasuhiro Kimura
- Department of Intensive Care Medicine, Yokohama Rosai Hospital, Yokohama, Japan
| | - Taikan Nanao
- Department of Intensive Care Medicine, Yokohama Rosai Hospital, Yokohama, Japan
| | - Junichi Fujimoto
- Department of Intensive Care Medicine, Yokohama Rosai Hospital, Yokohama, Japan
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8
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Alibayov B, Scasny A, Khan F, Creel A, Smith P, Vidal AGJ, Fitisemanu FM, Padilla-Benavides T, Weiser JN, Vidal JE. Oxidative Reactions Catalyzed by Hydrogen Peroxide Produced by Streptococcus pneumoniae and Other Streptococci Cause the Release and Degradation of Heme from Hemoglobin. Infect Immun 2022; 90:e0047122. [PMID: 36409115 PMCID: PMC9753736 DOI: 10.1128/iai.00471-22] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 10/25/2022] [Indexed: 11/23/2022] Open
Abstract
Streptococcus pneumoniae (Spn) strains cause pneumonia that kills millions every year worldwide. Spn produces Ply, a hemolysin that lyses erythrocytes releasing hemoglobin, and also produces the pro-oxidant hydrogen peroxide (Spn-H2O2) during growth. The hallmark of the pathophysiology of hemolytic diseases is the oxidation of hemoglobin, but oxidative reactions catalyzed by Spn-H2O2 have been poorly studied. We characterized the oxidation of hemoglobin by Spn-H2O2. We prepared a series of single-mutant (ΔspxB or ΔlctO), double-mutant (ΔspxB ΔlctO), and complemented strains in TIGR4, D39, and EF3030. We then utilized an in vitro model with oxyhemoglobin to demonstrate that oxyhemoglobin was oxidized rapidly, within 30 min of incubation, by Spn-H2O2 to methemoglobin and that the main source of Spn-H2O2 was pyruvate oxidase (SpxB). Moreover, extended incubation caused the release and the degradation of heme. We then assessed oxidation of hemoglobin and heme degradation by other bacterial inhabitants of the respiratory tract. All hydrogen peroxide-producing streptococci tested caused the oxidation of hemoglobin and heme degradation, whereas bacterial species that produce <1 μM H2O2 neither oxidized hemoglobin nor degraded heme. An ex vivo bacteremia model confirmed that oxidation of hemoglobin and heme degradation occurred concurrently with hemoglobin that was released from erythrocytes by Ply. Finally, gene expression studies demonstrated that heme, but not red blood cells or hemoglobin, induced upregulated transcription of the spxB gene. Oxidation of hemoglobin may be important for pathogenesis and for the symbiosis of hydrogen peroxide-producing bacteria with other species by providing nutrients such as iron.
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Affiliation(s)
- Babek Alibayov
- Department of Cell and Molecular Biology, School of Medicine, University of Mississippi Medical Center, Jackson, Mississippi, USA
| | - Anna Scasny
- Department of Cell and Molecular Biology, School of Medicine, University of Mississippi Medical Center, Jackson, Mississippi, USA
| | - Faidad Khan
- Department of Cell and Molecular Biology, School of Medicine, University of Mississippi Medical Center, Jackson, Mississippi, USA
| | - Aidan Creel
- Department of Cell and Molecular Biology, School of Medicine, University of Mississippi Medical Center, Jackson, Mississippi, USA
- Summer Undergraduate Research Experience Program, School of Graduate Studies in the Health Sciences, University of Mississippi Medical Center, Jackson, Mississippi, USA
| | - Perriann Smith
- Department of Cell and Molecular Biology, School of Medicine, University of Mississippi Medical Center, Jackson, Mississippi, USA
- Mississippi INBRE program, University of Southern Mississippi, Hattiesburg, Mississippi, USA
| | - Ana G. Jop Vidal
- Department of Cell and Molecular Biology, School of Medicine, University of Mississippi Medical Center, Jackson, Mississippi, USA
| | | | | | - Jeffrey N. Weiser
- Department of Microbiology, NYU Langone Health, New York, New York, USA
| | - Jorge E. Vidal
- Department of Cell and Molecular Biology, School of Medicine, University of Mississippi Medical Center, Jackson, Mississippi, USA
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9
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Yu H, Alruwaili N, Kelly MR, Zhang B, Liu A, Wang Y, Sun D, Wolin MS. Endothelin-1 depletion of cartilage oligomeric matrix protein modulates pulmonary artery superoxide and iron metabolism-associated mitochondrial heme biosynthesis. Am J Physiol Lung Cell Mol Physiol 2022; 323:L400-L409. [PMID: 35943724 PMCID: PMC9484992 DOI: 10.1152/ajplung.00534.2020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 08/03/2022] [Accepted: 08/05/2022] [Indexed: 11/22/2022] Open
Abstract
This study examines if heme biosynthesis-associated iron metabolism is regulated in pulmonary arteries by endothelin-1 (ET1) potentially through modulating cartilage oligomeric matrix protein (COMP) availability. Our studies in organoid-cultured endothelium-rubbed bovine pulmonary arteries (BPAs) observed COMP depletion by siRNA or hypoxia increases NOX2 and superoxide and depletes mitochondrial SOD2. ET1 also increases superoxide in a manner that potentially impairs mitochondrial heme biosynthesis. In this study, organoid culture of BPA with ET1 (10 nM) increases superoxide in the mitochondrial matrix and extramitochondrial regions associated with COMP depletion, and COMP (0.5 μM) inhibited these superoxide increases. As mitochondrial matrix superoxide could impair heme biosynthesis from protoporphyrin IX (PpIX) by decreasing Fe2+ availability and/or ferrochelatase (FECH), we studied ET1, COMP, and COMP siRNA effects on the expression of FECH, transferrin receptor-1 (TfR1, an indicator of iron availability) and soluble guanylate cyclase (sGC, a key heme-dependent protein), and on measurements of PpIX (HPLC) and heme content. ET1 decreased FECH, heme, and sGC, and increased TfR1 and iron. COMP reversed these effects of ET1, and COMP decreased PpIX and increased heme in the absence of ET1. COMP siRNA increased PpIX detection and TfR1 expression and decreased the expression of FECH and sGC. Nitric oxide (spermine NONOate) relaxation of BPA was inhibited by ET1, and this was attenuated by COMP during exposure to ET1. Thus, COMP depletion by ET1 or siRNA modulates pulmonary artery iron metabolism, which results in loss of heme biosynthesis and heme-dependent cGMP mechanisms.
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Affiliation(s)
- Hang Yu
- Department of Physiology, Harbin Medical University-Daqing, Daqing, China
- Department of Physiology, New York Medical College, Valhalla, New York
| | - Norah Alruwaili
- Department of Physiology, New York Medical College, Valhalla, New York
| | - Melissa R Kelly
- Department of Physiology, New York Medical College, Valhalla, New York
| | - Bin Zhang
- Department of Physiology, New York Medical College, Valhalla, New York
- Department of Gastrointestinal Surgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Aijing Liu
- Department of Physiology, Harbin Medical University-Daqing, Daqing, China
| | - Yingqi Wang
- Department of Physiology, Harbin Medical University-Daqing, Daqing, China
| | - Dong Sun
- Department of Physiology, New York Medical College, Valhalla, New York
| | - Michael S Wolin
- Department of Physiology, New York Medical College, Valhalla, New York
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Shiratori T, Hotta K, Satoh M, Kamigaito T, Goto M. Higher hematocrit level associated with higher 5-aminolevulinic acid-induced perioperative blood pressure change. Photodiagnosis Photodyn Ther 2022; 38:102821. [DOI: 10.1016/j.pdpdt.2022.102821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 03/09/2022] [Accepted: 03/17/2022] [Indexed: 10/18/2022]
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Morisawa S, Jobu K, Ishida T, Kawada K, Fukuda H, Kawanishi Y, Nakayama T, Yamamoto S, Tamura N, Takemura M, Kagimoto N, Ohta T, Masahira N, Fukuhara H, Ogura SI, Ueba T, Inoue K, Miyamura M. Association of 5-aminolevulinic acid with intraoperative hypotension in malignant glioma surgery. Photodiagnosis Photodyn Ther 2021; 37:102657. [PMID: 34848378 DOI: 10.1016/j.pdpdt.2021.102657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 11/17/2021] [Accepted: 11/24/2021] [Indexed: 02/07/2023]
Abstract
BACKGROUND Use of 5-aminolevulinic acid for photodynamic malignant tumor diagnosis reportedly causes intraoperative hypotension (systolic blood pressure < 70 mmHg) during urologic surgery. However, its association with intraoperative hypotension in malignant glioma surgery and underlying mechanisms has not yet been elucidated.. This study aimed to investigate whether 5-aminolevulinic acid administration is associated with intraoperative hypotension in malignant glioma surgery and explore the mechanisms of 5-aminolevulinic acid-induced hypotension in vitro. METHODS In this retrospective multicenter cohort study, we investigated intracellular nitric oxide as a candidate mediator of hypotension in response to 5-aminolevulinic acid in vitro in human umbilical vein endothelial cell cultures. RESULTS Of 142 patients, 94 underwent 5-aminolevulinic acid-guided surgery. Systolic blood pressure was significantly lower throughout surgery with 5-aminolevulinic acid administration. 5-Aminolevulinic acid administration was an independent risk factor for intraoperative hypotension according to multivariable logistic regression analysis (89% vs. 56%; odds ratio = 6.72, 95% confidence interval [2.05-22.1], P = 002). In subgroup analysis of the 5-aminolevulinic acid group, increasing age and use of renin-angiotensin system inhibitors had a synergistic effect with 5-aminolevulinic acid on decreased blood pressure. In the vascular endothelial cell culture study, 5-aminolevulinic acid induced a significant increase in intracellular nitric oxide generation. CONCLUSIONS 5-Aminolevulinic acid administration was associated with intraoperative hypotension in malignant glioma surgery, with increasing age and use of renin-angiotensin system inhibitors boosting the blood pressure-lowering effect of 5-aminolevulinic acid. According to in vitro results, the low blood pressure induced by 5-aminolevulinic acid may be mediated by a nitric oxide increase in vascular endothelial cells.
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Affiliation(s)
- Shumpei Morisawa
- Department of Pharmacy, Kochi Medical School Hospital, 185-1, Kohasu, Oko town, Nankoku, Kochi, Japan; Graduate School of Integrated Arts and Sciences Kochi University, 185-1, Kohasu, Oko town, Nankoku, Kochi, Japan.
| | - Kohei Jobu
- Department of Pharmacy, Kochi Medical School Hospital, 185-1, Kohasu, Oko town, Nankoku, Kochi, Japan
| | - Tomoaki Ishida
- Department of Pharmacy, Kochi Medical School Hospital, 185-1, Kohasu, Oko town, Nankoku, Kochi, Japan
| | - Kei Kawada
- Department of Pharmacy, Kochi Medical School Hospital, 185-1, Kohasu, Oko town, Nankoku, Kochi, Japan; Graduate School of Integrated Arts and Sciences Kochi University, 185-1, Kohasu, Oko town, Nankoku, Kochi, Japan
| | - Hitoshi Fukuda
- Department of Neurosurgery, Kochi Medical School, Kochi University, 185-1, Kohasu, Oko town, Nankoku, Kochi, Japan
| | - Yu Kawanishi
- Department of Neurosurgery, Kochi Medical School, Kochi University, 185-1, Kohasu, Oko town, Nankoku, Kochi, Japan
| | - Taku Nakayama
- Center for Photodynamic Medicine, Kochi Medical School, 185-1, Kohasu, Oko town, Nankoku, Kochi, Japan
| | - Shinkuro Yamamoto
- Department of Urology, Kochi Medical School, 185-1, Kohasu, Oko town, Nankoku, Kochi, Japan
| | - Naohisa Tamura
- Department of Pharmacy, Kochi Medical School Hospital, 185-1, Kohasu, Oko town, Nankoku, Kochi, Japan; Graduate School of Integrated Arts and Sciences Kochi University, 185-1, Kohasu, Oko town, Nankoku, Kochi, Japan
| | - Mitsuhiro Takemura
- Department of Neurosurgery, Kochi Medical School, Kochi University, 185-1, Kohasu, Oko town, Nankoku, Kochi, Japan
| | - Nao Kagimoto
- Department of Neurosurgery, Kochi Medical School, Kochi University, 185-1, Kohasu, Oko town, Nankoku, Kochi, Japan
| | - Tsuyoshi Ohta
- Department of Neurosurgery, National Cerebral and Cardiovascular Center Hospital, 6-1 Kishibe Shimmachi, Suita Osaka, Japan
| | - Noritaka Masahira
- Department of Neurosurgery, Kochi Health Sciences Center, 2125-1, Ike, Kochi, Kochi, Japan
| | - Hideo Fukuhara
- Center for Photodynamic Medicine, Kochi Medical School, 185-1, Kohasu, Oko town, Nankoku, Kochi, Japan; Department of Urology, Kochi Medical School, 185-1, Kohasu, Oko town, Nankoku, Kochi, Japan
| | - Shun-Ichiro Ogura
- Center for Photodynamic Medicine, Kochi Medical School, 185-1, Kohasu, Oko town, Nankoku, Kochi, Japan; School of Life Science and Technology, Tokyo Institute of Technology, 4259 B47, Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa, Japan
| | - Tetsuya Ueba
- Department of Neurosurgery, Kochi Medical School, Kochi University, 185-1, Kohasu, Oko town, Nankoku, Kochi, Japan
| | - Keiji Inoue
- Center for Photodynamic Medicine, Kochi Medical School, 185-1, Kohasu, Oko town, Nankoku, Kochi, Japan; Department of Urology, Kochi Medical School, 185-1, Kohasu, Oko town, Nankoku, Kochi, Japan
| | - Mitsuhiko Miyamura
- Department of Pharmacy, Kochi Medical School Hospital, 185-1, Kohasu, Oko town, Nankoku, Kochi, Japan; Graduate School of Integrated Arts and Sciences Kochi University, 185-1, Kohasu, Oko town, Nankoku, Kochi, Japan
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Identification of risk factors associated with oral 5-aminolevulinic acid-induced hypotension in photodynamic diagnosis for non-muscle invasive bladder cancer: a multicenter retrospective study. BMC Cancer 2021; 21:1223. [PMID: 34774000 PMCID: PMC8590750 DOI: 10.1186/s12885-021-08976-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Accepted: 11/08/2021] [Indexed: 11/18/2022] Open
Abstract
Background To investigate risk factors for orally administered 5-aminolevulinic acid (ALA)-induced hypotension for bladder cancer patients receiving photodynamic diagnosis (PDD)-assisted transurethral resection of bladder tumor (TURBT). Methods Patients were categorized into two groups intraoperatively: a hypotensive group (minimum systolic blood pressure (SBP) ≤80 mmHg) and a non-hypotensive group (minimum SBP > 80 mmHg). We examined differences between the hypotensive group and non-hypotensive groups to identify clinical risk of ALA-induced hypotension using multivariate logistic regression analysis and decision tree analysis. Results Among 282 cases with ALA-PDD-assisted TURBT from three institutions who were screened, 245 patients were included in the final analysis. In total, 156 patients (63.7%) showed any grade of hypotension during ALA-PDD-assisted TURBT. General anesthesia and spinal anesthesia were induced intraoperatively in 113 patients (46.1%) and 132 patients (53.9%), respectively. Median SBP at baseline (before taking ALA) and at the beginning of anesthesia was 127 mmHg (range, 69–186 mmHg) and 124 mmHg (range, 69–186 mmHg), respectively. Median minimum SBP during ALA-PDD-assisted TURBT was 75 mmHg (range, 43–140 mmHg). Multivariate logistic regression analysis revealed that history of hypertension (odds ratio (OR) 7.568, p < 0.05) and general anesthesia (OR 14.435, p < 0.05) as significantly associated with an increased risk of hypotension incidence. Use of calcium antagonist showed significant negative associations with hypotension (OR 0.183, p < 0.05). Decision tree analysis showed presence of general anesthesia, age ≥ 74 years and American Society of Anesthesiologists physical status (ASA-PS) ≥2 as the most important discriminators. Conclusions General anesthesia and hypertension were independent risk factors related to ALA-induced hypotension. In contrast, use of calcium antagonists was identified as a factor associated with reduced risk of ALA-induced hypotension.
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Bechara EJ, Ramos LD, Stevani CV. 5-Aminolevulinic acid: A matter of life and caveats. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY 2021. [DOI: 10.1016/j.jpap.2021.100036] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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Taniguchi S, Zhu Z, Matsuzaki M, Tsudzuki M, Maeda T. 5-aminolevulinic acid improves chicken sperm motility. Anim Biosci 2021; 34:1912-1920. [PMID: 33902172 PMCID: PMC8563236 DOI: 10.5713/ab.21.0021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 04/06/2021] [Indexed: 11/27/2022] Open
Abstract
Objective This study investigated the effects of 5-aminolevulinic acid (5-ALA) on the motility parameters, mitochondrial membrane depolarization, and ATP levels in chicken sperm. Methods The pooled semen from Barred Plymouth Rock males was used. In the first experiment, the semen was diluted 4-times with phosphate-buffered saline (PBS (-)) containing various concentrations (0, 0.01, 0.05, and 0.1 mM) of 5-ALA, and then the sperm motility parameters after incubation were evaluated by computer-assisted sperm analysis (CASA). In the second experiment, the semen was diluted 4-times with PBS (-) containing 0.05 mM 5-ALA, and then sperm mitochondrial membrane depolarization and ATP levels after 1.5 h of incubation were analyzed with the MitoPT® JC-1 Assay and ATP Assay kits, respectively. In the third experiment, the semen was removed from the seminal plasma and resuspended with the mediums of PBS (-), PBS (-) supplemented with CaCl2 and MgCl2 (PBS (+)) + 5-ALA, PBS (+) + caffeine, and PBS (+) + caffeine + 5-ALA. Then, the sperm motility parameters after incubation were evaluated by CASA. In the last experiment, the semen was treated with the mediums of PBS (-), PBS (-) + 5-ALA, 5.7% glucose, 5.7% glucose + 5-ALA after removing the seminal plasma, and then the sperm motility parameters were evaluated by CASA. Results The addition of 0.05 mM 5-ALA significantly increased the chicken sperm motility, progressive motility, linearity, average path velocity, curvilinear velocity, straight-line velocity, and the wobble. The sperm mitochondrial membrane depolarization was also increased by the 5-ALA treatment. The 5-ALA treatment decreased the sperm ATP levels. Both the caffeine treatment and glucose treatment decreased the sperm motility during incubation period. Conclusion 5-ALA might increase sperm mitochondrial membrane depolarization to utilize the ATP for enhancing sperm movement.
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Affiliation(s)
- Shin Taniguchi
- Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima 739-8528, Japan.,One Health Business Department, Neopharma Japan Co., Ltd., Fujimi, Chiyodaku, Tokyo 102-0071, Japan
| | - Zhendong Zhu
- Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima 739-8528, Japan
| | - Mei Matsuzaki
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima 739-8528, Japan
| | - Masaoki Tsudzuki
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima 739-8528, Japan.,Japanese Avian Bioresource Project Research Center, Hiroshima University, Higashi-Hiroshima 739-8528, Japan
| | - Teruo Maeda
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima 739-8528, Japan.,Japanese Avian Bioresource Project Research Center, Hiroshima University, Higashi-Hiroshima 739-8528, Japan
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Kar SK, Wells JM, Ellen ED, Te Pas MFW, Madsen O, Groenen MAM, Woelders H. Organoids: a promising new in vitro platform in livestock and veterinary research. Vet Res 2021; 52:43. [PMID: 33691792 PMCID: PMC7943711 DOI: 10.1186/s13567-021-00904-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 01/13/2021] [Indexed: 02/06/2023] Open
Abstract
Organoids are self-organizing, self-renewing three-dimensional cellular structures that resemble organs in structure and function. They can be derived from adult stem cells, embryonic stem cells, or induced pluripotent stem cells. They contain most of the relevant cell types with a topology and cell-to-cell interactions resembling that of the in vivo tissue. The widespread and increasing adoption of organoid-based technologies in human biomedical research is testament to their enormous potential in basic, translational- and applied-research. In a similar fashion there appear to be ample possibilities for research applications of organoids from livestock and companion animals. Furthermore, organoids as in vitro models offer a great possibility to reduce the use of experimental animals. Here, we provide an overview of studies on organoids in livestock and companion animal species, with focus on the methods developed for organoids from a variety of tissues/organs from various animal species and on the applications in veterinary research. Current limitations, and ongoing research to address these limitations, are discussed. Further, we elaborate on a number of fields of research in animal nutrition, host-microbe interactions, animal breeding and genomics, and animal biotechnology, in which organoids may have great potential as an in vitro research tool.
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Affiliation(s)
- Soumya K Kar
- Wageningen Livestock Research, Wageningen University & Research, Wageningen, The Netherlands.
| | - Jerry M Wells
- Host-Microbe Interactomics, Wageningen University & Research, Wageningen, The Netherlands
| | - Esther D Ellen
- Wageningen Livestock Research, Wageningen University & Research, Wageningen, The Netherlands
| | - Marinus F W Te Pas
- Wageningen Livestock Research, Wageningen University & Research, Wageningen, The Netherlands
| | - Ole Madsen
- Animal Breeding and Genomics, Wageningen University & Research, Wageningen, The Netherlands
| | - Martien A M Groenen
- Animal Breeding and Genomics, Wageningen University & Research, Wageningen, The Netherlands
| | - Henri Woelders
- Wageningen Livestock Research, Wageningen University & Research, Wageningen, The Netherlands
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Yatabe T, Karashima T, Kume M, Kawanishi Y, Fukuhara H, Ueba T, Inoue K, Okuhara Y, Yokoyama M. Identification of risk factors for post-induction hypotension in patients receiving 5-aminolevulinic acid: a single-center retrospective study. JA Clin Rep 2020; 6:35. [PMID: 32399904 PMCID: PMC7218031 DOI: 10.1186/s40981-020-00340-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 04/30/2020] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND 5-Aminolevulinic acid (5-ALA) is useful as a photodynamic agent, but its use commonly leads to hypotension. Although avoiding a mean arterial pressure (MAP) < 60 mmHg is important, the incidence of MAP < 60 mmHg when using 5-ALA is unclear. Therefore, we conducted a retrospective study to assess the incidence of post-induction hypotension and identified risk factors of this phenomenon. METHODS One-hundred and seventy-two consecutive patients who underwent transurethral resection of the bladder tumor or craniotomy with the use of 5-ALA were enrolled. The primary outcome was the incidence of post-induction hypotension, defined as MAP < 60 mmHg during the first 1 h after anesthesia induction. We divided participants into the normal blood pressure group (group N) and the hypotension group (group L). RESULTS The incidence of post-induction hypotension was 70% (group L = 121, group N = 51). Multivariate analysis revealed that female sex was an independent factor of post-induction hypotension (odds ratio [OR] 3.95; 95% confidence interval [CI] 1.21-12.97; p = 0.02). Systolic blood pressure < 100 mmHg before anesthesia induction and general anesthesia were also identified as significant independent factors (OR 13.30; 95% CI 1.17-151.0; p = 0.04 and OR 25.84; 95% CI 9.80-68.49; p < 0.001, respectively). CONCLUSIONS The incidence of post-induction hypotension was 70% in patients using 5-ALA. Female sex, systolic blood pressure < 100 mmHg before anesthesia induction, and general anesthesia might be independent factors of post-induction hypotension when using 5-ALA.
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Affiliation(s)
- Tomoaki Yatabe
- Department of Anesthesiology and Intensive Care Medicine, Kochi Medical School, Kohasu, Oko-cho, Nankoku, Kochi, 783-8505, Japan.
| | | | - Motohiko Kume
- Medical safety management center, Kochi Medical School Hospital, Kochi, Japan
| | - Yu Kawanishi
- Department of Neurosurgery, Kochi Medical School, Kochi, Japan
| | - Hideo Fukuhara
- Department of Urology, Kochi Medical School, Kochi, Japan
| | - Tetsuya Ueba
- Department of Neurosurgery, Kochi Medical School, Kochi, Japan
| | - Keiji Inoue
- Department of Urology, Kochi Medical School, Kochi, Japan
| | - Yoshiyasu Okuhara
- Center of Medical Information Science, Kochi Medical School, Kochi, Japan
| | - Masataka Yokoyama
- Department of Anesthesiology and Intensive Care Medicine, Kochi Medical School, Kohasu, Oko-cho, Nankoku, Kochi, 783-8505, Japan
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Alruwaili N, Kandhi S, Sun D, Wolin MS. Metabolism and Redox in Pulmonary Vascular Physiology and Pathophysiology. Antioxid Redox Signal 2019; 31:752-769. [PMID: 30403147 PMCID: PMC6708269 DOI: 10.1089/ars.2018.7657] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Significance: This review considers how some systems controlling pulmonary vascular function are potentially regulated by redox processes to examine how and why conditions such as prolonged hypoxia, pathological mediators, and other factors promoting vascular remodeling contribute to the development of pulmonary hypertension (PH). Recent Advances and Critical Issues: Aspects of vascular remodeling induction mechanisms described are associated with shifts in glucose metabolism through the pentose phosphate pathway and increased cytosolic NADPH generation by glucose-6-phosphate dehydrogenase, increased glycolysis generation of cytosolic NADH and lactate, mitochondrial dysfunction associated with superoxide dismutase-2 depletion, changes in reactive oxygen species and iron metabolism, and redox signaling. Future Directions: The regulation and impact of hypoxia-inducible factor and the function of cGMP-dependent and redox regulation of protein kinase G are considered for their potential roles as key sensors and coordinators of redox and metabolic processes controlling the progression of vascular pathophysiology in PH, and how modulating aspects of metabolic and redox regulatory systems potentially function in beneficial therapeutic approaches.
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Affiliation(s)
- Norah Alruwaili
- Department of Physiology, New York Medical College, Valhalla, New York
| | - Sharath Kandhi
- Department of Physiology, New York Medical College, Valhalla, New York
| | - Dong Sun
- Department of Physiology, New York Medical College, Valhalla, New York
| | - Michael S Wolin
- Department of Physiology, New York Medical College, Valhalla, New York
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Noé R, Bozinovic N, Lecerf M, Lacroix-Desmazes S, Dimitrov JD. Use of cysteine as a spectroscopic probe for determination of heme-scavenging capacity of serum proteins and whole human serum. J Pharm Biomed Anal 2019; 172:311-319. [DOI: 10.1016/j.jpba.2019.05.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 05/03/2019] [Accepted: 05/05/2019] [Indexed: 12/23/2022]
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Effects of 5-aminolevulinic acid and sodium ferrous citrate on fibroblasts from individuals with mitochondrial diseases. Sci Rep 2019; 9:10549. [PMID: 31332208 PMCID: PMC6646320 DOI: 10.1038/s41598-019-46772-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 07/04/2019] [Indexed: 01/21/2023] Open
Abstract
Mitochondrial respiratory chain complexes II, III, and IV and cytochrome c contain haem, which is generated by the insertion of Fe2+ into protoporphyrin IX. 5-Aminolevulinic acid (ALA) combined with sodium ferrous citrate (SFC) was reported to enhance haem production, leading to respiratory complex and haem oxygenase-1 (HO-1) upregulation. Here, we investigated the effects of different concentrations of ALA and SFC alone or in combination (ALA/SFC) on fibroblasts from 8 individuals with mitochondrial diseases and healthy controls. In normal fibroblasts, expression levels of oxidative phosphorylation (OXPHOS) complex subunits and corresponding genes were upregulated only by ALA/SFC. Additionally, the increased oxygen consumption rate (OCR) and ATP levels in normal fibroblasts were more obvious after treatment with ALA/SFC than after treatment with ALA or SFC. OXPHOS complex proteins were enhanced by ALA/SFC, whereas OCR and ATP levels were increased in 6 of the 8 patient-derived fibroblasts. Further, HO-1 protein and mRNA levels were enhanced by ALA/SFC in all fibroblasts. The relative mtDNA copy number was increased by ALA/SFC. Thus, our findings indicate that ALA/SFC is effective in elevating OXPHOS, HO-1 protein, and mtDNA copy number, resulting in an increase in OCR and ATP levels, which represents a promising therapeutic option for mitochondrial diseases.
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Inhibition of ferrochelatase impairs vascular eNOS/NO and sGC/cGMP signaling. PLoS One 2018; 13:e0200307. [PMID: 29985945 PMCID: PMC6037352 DOI: 10.1371/journal.pone.0200307] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Accepted: 06/22/2018] [Indexed: 01/14/2023] Open
Abstract
Ferrochelatase (FECH) is an enzyme necessary for heme synthesis, which is essential for maintaining normal functions of endothelial nitric oxide synthase (eNOS) and soluble guanylyl cyclase (sGC). We tested the hypothesis that inhibition of vascular FECH to attenuate heme synthesis downregulates eNOS and sGC expression, resulting in impaired NO/cGMP-dependent relaxation. To this end, isolated bovine coronary arteries (BCAs) were in vitro incubated without (as controls) or with N-methyl protoporphyrin (NMPP; 10−5–10-7M; a selective FECH antagonist) for 24 and 72 hours respectively. Tissue FECH activity, heme, nitrite/NO and superoxide levels were sequentially measured. Protein expression of FECH, eNOS and sGC was detected by western blot analysis. Vascular responses to various vasoactive agents were evaluated via isometric tension studies. Treatment of BCAs with NMPP initiated a time- and dose-dependent attenuation of FECH activity without changes in its protein expression, followed by significant reduction in the heme level. Moreover, ACh-induced relaxation and ACh-stimulated release of NO were significant reduced, associated with suppression of eNOS protein expression in NMPP-treated groups. Decreased relaxation to NO donor spermine-NONOate reached the statistical significance in BCAs incubated with NMPP for 72 hours, concomitantly with downregulation of sGCβ1 expression that was independent of heat shock protein 90 (HSP90), nor did it significantly affect BCA relaxation caused by BAY 58–2667 that activates sGC in the heme-deficiency. Neither vascular responses to non-NO/sGC-mediators nor production of superoxide was affected by NMPP-treatment. In conclusion, deletion of vascular heme production via inhibiting FECH elicits downregulation of eNOS and sGC expression, leading to an impaired NO-mediated relaxation in an oxidative stress-independent manner.
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Shah RC, Sanker S, Wood KC, Durgin BG, Straub AC. Redox regulation of soluble guanylyl cyclase. Nitric Oxide 2018; 76:97-104. [PMID: 29578056 DOI: 10.1016/j.niox.2018.03.013] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2017] [Revised: 02/28/2018] [Accepted: 03/19/2018] [Indexed: 11/15/2022]
Abstract
The nitric oxide/soluble guanylyl cyclase (NO-sGC) signaling pathway regulates the cardiovascular, neuronal, and gastrointestinal systems. Impaired sGC signaling can result in disease and system-wide organ failure. This review seeks to examine the redox control of sGC through heme and cysteine regulation while discussing therapeutic drugs that target various conditions. Heme regulation involves mechanisms of insertion of the heme moiety into the sGC protein, the molecules and proteins that control switching between the oxidized (Fe3+) and reduced states (Fe2+), and the activity of heme degradation. Modifications to cysteine residues by S-nitrosation on the α1 and β1 subunits of sGC have been shown to be important in sGC signaling. Moreover, redox balance and localization of sGC is thought to control downstream effects. In response to altered sGC activity due to changes in the redox state, many therapeutic drugs have been developed to target decreased NO-sGC signaling. The importance and relevance of sGC continues to grow as sGC dysregulation leads to numerous disease conditions.
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Affiliation(s)
- Rohan C Shah
- Pittsburgh Heart, Lung, Blood and Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA, USA
| | - Subramaniam Sanker
- Pittsburgh Heart, Lung, Blood and Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA, USA
| | - Katherine C Wood
- Pittsburgh Heart, Lung, Blood and Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA, USA
| | - Brittany G Durgin
- Pittsburgh Heart, Lung, Blood and Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA, USA
| | - Adam C Straub
- Pittsburgh Heart, Lung, Blood and Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA, USA; Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, PA, USA.
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Ota U, Hara T, Nakagawa H, Tsuru E, Tsuda M, Kamiya A, Kuroda Y, Kitajima Y, Koda A, Ishizuka M, Fukuhara H, Inoue K, Shuin T, Nakajima M, Tanaka T. 5-aminolevulinic acid combined with ferrous ion reduces adiposity and improves glucose tolerance in diet-induced obese mice via enhancing mitochondrial function. BMC Pharmacol Toxicol 2017; 18:7. [PMID: 28132645 PMCID: PMC5278573 DOI: 10.1186/s40360-016-0108-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Accepted: 12/01/2016] [Indexed: 01/10/2023] Open
Abstract
Background Mitochondrial dysfunction is associated with obesity and various obesity-associated pathological conditions including glucose intolerance. 5-Aminolevulinic acid (ALA), a precursor of heme metabolites, is a natural amino acid synthesized in the mitochondria, and various types of cytochromes containing heme contribute to aerobic energy metabolism. Thus, ALA might have beneficial effects on the reduction of adiposity and improvement of glucose tolerance through its promotion of heme synthesis. In the present study, we investigated the effects of ALA combined with sodium ferrous citrate (SFC) on obesity and glucose intolerance in diet-induced obese mice. Methods We used 20-weeks-old male C57BL/6J diet-induced obesity (DIO) mice that had been fed high-fat diet from 4th week or wild-type C57BL/6J mice. The DIO mice were orally administered ALA combined with SFC (ALA/SFC) for 6 weeks. At the 4th and 5th week during ALA/SFC administration, mice were fasted for 5 h and overnight, respectively and used for oral glucose tolerance test. After the ALA/SFC administration, the plasma glucose levels, weight of white adipose tissue, and expression levels of mitochondrial oxidative phosphorylation (OXPHOS) complexes were examined. Furthermore, the effects of ALA/SFC on lipid content and glucose uptake were examined in vitro. Results Oral administration of ALA/SFC for 6 weeks reduced the body weight by about 10% and the weight of white adipose tissues in these animals. In vitro, ALA/SFC reduced lipid content in mouse 3T3-L1 adipocytes in a dose dependent manner, and enhanced glucose uptake in 3T3-L1 adipocytes by 70–90% and rat L6 myoblasts by 30% at 6 h. Additionally, oral administration of ALA/SFC reduced plasma glucose levels and improved glucose tolerance in DIO mice. Furthermore, ALA/SFC enhanced the expression of OXPHOS complexes III, IV, and V by 40–70% in white adipose tissues of DIO mice, improving mitochondrial function. Conclusions Our findings indicate that ALA/SFC is effective in the reduction of adiposity and improvement of glucose tolerance, and that the induction of mitochondrial OXPHOS complex III, IV, and V by ALA/SFC might be an essential component of the molecular mechanisms underlying these effects. ALA/SFC might be a useful supplement for obesity and obesity-related metabolic disease such as type 2 diabetes mellitus. Electronic supplementary material The online version of this article (doi:10.1186/s40360-016-0108-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Urara Ota
- SBI Pharmaceuticals Co. Ltd., 1-6-1, Roppongi, Minato-ku, Tokyo, 106-6020, Japan
| | - Takeshi Hara
- SBI Pharmaceuticals Co. Ltd., 1-6-1, Roppongi, Minato-ku, Tokyo, 106-6020, Japan.
| | - Hitoshi Nakagawa
- SBI Pharmaceuticals Co. Ltd., 1-6-1, Roppongi, Minato-ku, Tokyo, 106-6020, Japan
| | - Emi Tsuru
- Institute for Laboratory Animal Research, Kochi Medical School, Kochi University, Kohasu, Oko-cho, Nankoku, 783-8505, Japan
| | - Masayuki Tsuda
- Institute for Laboratory Animal Research, Kochi Medical School, Kochi University, Kohasu, Oko-cho, Nankoku, 783-8505, Japan
| | - Atsuko Kamiya
- SBI Pharmaceuticals Co. Ltd., 1-6-1, Roppongi, Minato-ku, Tokyo, 106-6020, Japan
| | - Yasushi Kuroda
- SBI Pharmaceuticals Co. Ltd., 1-6-1, Roppongi, Minato-ku, Tokyo, 106-6020, Japan
| | - Yuya Kitajima
- SBI Pharmaceuticals Co. Ltd., 1-6-1, Roppongi, Minato-ku, Tokyo, 106-6020, Japan
| | - Aya Koda
- SBI Pharmaceuticals Co. Ltd., 1-6-1, Roppongi, Minato-ku, Tokyo, 106-6020, Japan
| | - Masahiro Ishizuka
- SBI Pharmaceuticals Co. Ltd., 1-6-1, Roppongi, Minato-ku, Tokyo, 106-6020, Japan
| | - Hideo Fukuhara
- Department of Urology, Kochi Medical School, Kochi University, Kohasu, Oko-cho, Nankoku, 783-8505, Japan
| | - Keiji Inoue
- Department of Urology, Kochi Medical School, Kochi University, Kohasu, Oko-cho, Nankoku, 783-8505, Japan
| | - Taro Shuin
- Department of Urology, Kochi Medical School, Kochi University, Kohasu, Oko-cho, Nankoku, 783-8505, Japan
| | - Motowo Nakajima
- SBI Pharmaceuticals Co. Ltd., 1-6-1, Roppongi, Minato-ku, Tokyo, 106-6020, Japan
| | - Tohru Tanaka
- SBI Pharmaceuticals Co. Ltd., 1-6-1, Roppongi, Minato-ku, Tokyo, 106-6020, Japan
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Hara T, Koda A, Nozawa N, Ota U, Kondo H, Nakagawa H, Kamiya A, Miyashita K, Itoh H, Nakajima M, Tanaka T. Combination of 5-aminolevulinic acid and ferrous ion reduces plasma glucose and hemoglobin A1c levels in Zucker diabetic fatty rats. FEBS Open Bio 2016; 6:515-28. [PMID: 27239432 PMCID: PMC4880722 DOI: 10.1002/2211-5463.12048] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 01/18/2016] [Accepted: 02/13/2016] [Indexed: 12/14/2022] Open
Abstract
Mitochondrial dysfunction is associated with type 2 diabetes mellitus (T2DM). 5‐Aminolevulinic acid (ALA), a natural amino acid produced only in the mitochondria, is a precursor of heme. Cytochromes that contain heme play an important role in aerobic energy metabolism. Thus, ALA may help reduce T2DM‐associated hyperglycemia. In this study, we investigated the effect of ALA combined with sodium ferrous citrate (SFC) on hyperglycemia in Zucker diabetic fatty (ZDF) rats. We found that the gavage administration of ALA combined with SFC (ALA/SFC) for 6 weeks reduced plasma glucose and hemoglobin A1c (HbA1c) levels in rats without affecting plasma insulin levels. The glucose‐lowering effect depended on the amount of ALA/SFC administered per day. Furthermore, the glucose tolerance was also significantly improved by ALA/SFC administration. Although food intake was slightly reduced in the rats administered ALA/SFC, there was no effect on their body weight. Importantly, ALA/SFC administration induced heme oxygenase‐1 (HO‐1) expression in white adipose tissue and liver, and the induced expression levels of HO‐1 correlated with the glucose‐lowering effects of ALA/SFC. Taken together, these results suggest that ALA combined with ferrous ion is effective in reducing hyperglycemia of T2DM without affecting plasma insulin levels. HO‐1 induction may be involved in the mechanisms underlying the glucose‐lowering effect of ALA/SFC.
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Affiliation(s)
- Takeshi Hara
- SBI Pharmaceuticals Co., Ltd. Minato-ku Tokyo Japan
| | - Aya Koda
- SBI Pharmaceuticals Co., Ltd. Minato-ku Tokyo Japan
| | - Naoko Nozawa
- SBI Pharmaceuticals Co., Ltd. Minato-ku Tokyo Japan
| | - Urara Ota
- SBI Pharmaceuticals Co., Ltd. Minato-ku Tokyo Japan
| | - Hikaru Kondo
- SBI Pharmaceuticals Co., Ltd. Minato-ku Tokyo Japan
| | | | | | - Kazutoshi Miyashita
- Department of Internal Medicine School of Medicine Keio University Tokyo Japan
| | - Hiroshi Itoh
- Department of Internal Medicine School of Medicine Keio University Tokyo Japan
| | | | - Tohru Tanaka
- SBI Pharmaceuticals Co., Ltd. Minato-ku Tokyo Japan
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Patel D, Alhawaj R, Kelly MR, Accarino JJO, Lakhkar A, Gupte SA, Sun D, Wolin MS. Potential role of mitochondrial superoxide decreasing ferrochelatase and heme in coronary artery soluble guanylate cyclase depletion by angiotensin II. Am J Physiol Heart Circ Physiol 2016; 310:H1439-47. [PMID: 27037373 DOI: 10.1152/ajpheart.00859.2015] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Accepted: 03/28/2016] [Indexed: 02/07/2023]
Abstract
Oxidation of the soluble guanylate cyclase (sGC) heme promotes loss of regulation by nitric oxide (NO) and depletion of sGC. We hypothesized that angiotensin II (ANG II) stimulation of mitochondrial superoxide by its type 1 receptor could function as a potential inhibitor of heme biosynthesis by ferrochelatase, and this could decrease vascular responsiveness to NO by depleting sGC. These processes were investigated in a 24-h organoid culture model of bovine coronary arteries (BCA) with 0.1 μM ANG II. Treatment of BCA with ANG II increased mitochondrial superoxide, depleted mitochondrial superoxide dismutase (SOD2), ferrochelatase, and cytochrome oxidase subunit 4, and sGC, associated with impairment of relaxation to NO. These processes were attenuated by organoid culture with 8-bromo-cGMP and/or δ-aminolevulinic acid (a stimulator of sGC by protoporphyrin IX generation and heme biosynthesis). Organoid culture with Mito-TEMPOL, a scavenger of mitochondrial matrix superoxide, also attenuated ANG II-elicited ferrochelatase depletion and loss of relaxation to NO, whereas organoid culture with Tempol, an extramitochondrial scavenger of superoxide, attenuated the loss of relaxation to NO by ANG II, but not ferrochelatase depletion, suggesting cytosolic superoxide could be an initiating factor in the loss of sGC regulation by NO. The depletion of cytochrome oxidase subunit 4 and sGC (but not catalase) suggests that sGC expression may be very sensitive to depletion of heme caused by ANG II disrupting ferrochelatase activity by increasing mitochondrial superoxide. In addition, cGMP-dependent activation of protein kinase G appears to attenuate these ANG II-stimulated processes through both preventing SOD2 depletion and increases in mitochondrial and extramitochondrial superoxide.
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Affiliation(s)
- Dhara Patel
- Department of Physiology, Translational Center for Pulmonary Hypertension, New York Medical College, Valhalla, New York and
| | - Raed Alhawaj
- Department of Physiology, Translational Center for Pulmonary Hypertension, New York Medical College, Valhalla, New York and
| | - Melissa R Kelly
- Department of Physiology, Translational Center for Pulmonary Hypertension, New York Medical College, Valhalla, New York and
| | - John J O Accarino
- Department of Physiology, Translational Center for Pulmonary Hypertension, New York Medical College, Valhalla, New York and
| | - Anand Lakhkar
- Department of Pharmacology, Translational Center for Pulmonary Hypertension, New York Medical College, Valhalla, New York
| | - Sachin A Gupte
- Department of Pharmacology, Translational Center for Pulmonary Hypertension, New York Medical College, Valhalla, New York
| | - Dong Sun
- Department of Physiology, Translational Center for Pulmonary Hypertension, New York Medical College, Valhalla, New York and
| | - Michael S Wolin
- Department of Physiology, Translational Center for Pulmonary Hypertension, New York Medical College, Valhalla, New York and
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Masuki S, Morita A, Kamijo YI, Ikegawa S, Kataoka Y, Ogawa Y, Sumiyoshi E, Takahashi K, Tanaka T, Nakajima M, Nose H. Impact of 5-aminolevulinic acid with iron supplementation on exercise efficiency and home-based walking training achievement in older women. J Appl Physiol (1985) 2016; 120:87-96. [PMID: 26514619 PMCID: PMC4698441 DOI: 10.1152/japplphysiol.00582.2015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Accepted: 10/25/2015] [Indexed: 11/22/2022] Open
Abstract
A reduction in exercise efficiency with aging limits daily living activities. We examined whether 5-aminolevulinic acid (ALA) with sodium ferrous citrate (SFC) increased exercise efficiency and voluntary achievement of interval walking training (IWT) in older women. Ten women [65 ± 3(SD) yr] who had performed IWT for >12 mo and were currently performing IWT participated in this study. The study was conducted in a placebo-controlled, double-blind crossover design. All subjects underwent two trials for 7 days each in which they performed IWT with ALA+SFC (100 and 115 mg/day, respectively) or placebo supplement intake (CNT), intermittently with a 2-wk washout period. Before and after each trial, subjects underwent a graded cycling test at 27.0 °C atmospheric temperature and 50% relative humidity, and oxygen consumption rate, carbon dioxide production rate, and lactate concentration in plasma were measured. Furthermore, for the first 6 days of each trial, exercise intensity for IWT was measured by accelerometry. We found that, in the ALA+SFC trial, oxygen consumption rate and carbon dioxide production rate during graded cycling decreased by 12% (P < 0.001) and 11% (P = 0.001) at every workload, respectively, accompanied by a 16% reduction in lactate concentration in plasma (P < 0.001), although all remained unchanged in the CNT trial (P > 0.2). All of the reductions were significantly greater in the ALA+SFC than the CNT trial (P < 0.05). Furthermore, the training days, impulse, and time at fast walking were 42% (P = 0.028), 102% (P = 0.027), and 69% (P = 0.039) higher during the ALA+SFC than the CNT intake period, respectively. Thus ALA+SFC supplementation augmented exercise efficiency and thereby improved IWT achievement in older women.
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Affiliation(s)
- Shizue Masuki
- Department of Sports Medical Sciences, Shinshu University Graduate School of Medicine, Matsumoto, Japan; Institute for Biomedical Sciences, Shinshu University, Matsumoto, Japan; and
| | - Atsumi Morita
- Department of Sports Medical Sciences, Shinshu University Graduate School of Medicine, Matsumoto, Japan
| | - Yoshi-ichiro Kamijo
- Department of Sports Medical Sciences, Shinshu University Graduate School of Medicine, Matsumoto, Japan; Institute for Biomedical Sciences, Shinshu University, Matsumoto, Japan; and
| | - Shigeki Ikegawa
- Department of Sports Medical Sciences, Shinshu University Graduate School of Medicine, Matsumoto, Japan
| | - Yufuko Kataoka
- Department of Sports Medical Sciences, Shinshu University Graduate School of Medicine, Matsumoto, Japan
| | - Yu Ogawa
- Department of Sports Medical Sciences, Shinshu University Graduate School of Medicine, Matsumoto, Japan
| | - Eri Sumiyoshi
- Department of Sports Medical Sciences, Shinshu University Graduate School of Medicine, Matsumoto, Japan
| | | | - Tohru Tanaka
- Department of R&D, SBI Pharmaceuticals Co., Ltd., Tokyo, Japan
| | - Motowo Nakajima
- Department of R&D, SBI Pharmaceuticals Co., Ltd., Tokyo, Japan
| | - Hiroshi Nose
- Department of Sports Medical Sciences, Shinshu University Graduate School of Medicine, Matsumoto, Japan; Institute for Biomedical Sciences, Shinshu University, Matsumoto, Japan; and
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Alhawaj R, Patel D, Kelly MR, Sun D, Wolin MS. Heme biosynthesis modulation via δ-aminolevulinic acid administration attenuates chronic hypoxia-induced pulmonary hypertension. Am J Physiol Lung Cell Mol Physiol 2015; 308:L719-28. [PMID: 25659899 DOI: 10.1152/ajplung.00155.2014] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Accepted: 02/02/2015] [Indexed: 11/22/2022] Open
Abstract
This study examines how heme biosynthesis modulation with δ-aminolevulinic acid (ALA) potentially functions to prevent 21-day hypoxia (10% oxygen)-induced pulmonary hypertension in mice and the effects of 24-h organoid culture with bovine pulmonary arteries (BPA) with the hypoxia and pulmonary hypertension mediator endothelin-1 (ET-1), with a focus on changes in superoxide and regulation of micro-RNA 204 (miR204) expression by src kinase phosphorylation of signal transducer and activator of transcription-3 (STAT3). The treatment of mice with ALA attenuated pulmonary hypertension (assessed through echo Doppler flow of the pulmonary valve, and direct measurements of right ventricular systolic pressure and right ventricular hypertrophy), increases in pulmonary arterial superoxide (detected by lucigenin), and decreases in lung miR204 and mitochondrial superoxide dismutase (SOD2) expression. ALA treatment of BPA attenuated ET-1-induced increases in mitochondrial superoxide (detected by MitoSox), STAT3 phosphorylation, and decreases in miR204 and SOD2 expression. Because ALA increases BPA protoporphyrin IX (a stimulator of guanylate cyclase) and cGMP-mediated protein kinase G (PKG) activity, the effects of the PKG activator 8-bromo-cGMP were examined and found to also attenuate the ET-1-induced increase in superoxide. ET-1 increased superoxide production and the detection of protoporphyrin IX fluorescence, suggesting oxidant conditions might impair heme biosynthesis by ferrochelatase. However, chronic hypoxia actually increased ferrochelatase activity in mouse pulmonary arteries. Thus, a reversal of factors increasing mitochondrial superoxide and oxidant effects that potentially influence remodeling signaling related to miR204 expression and perhaps iron availability needed for the biosynthesis of heme by the ferrochelatase reaction could be factors in the beneficial actions of ALA in pulmonary hypertension.
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Affiliation(s)
- Raed Alhawaj
- Department of Physiology, New York Medical College, Valhalla, New York
| | - Dhara Patel
- Department of Physiology, New York Medical College, Valhalla, New York
| | - Melissa R Kelly
- Department of Physiology, New York Medical College, Valhalla, New York
| | - Dong Sun
- Department of Physiology, New York Medical College, Valhalla, New York
| | - Michael S Wolin
- Department of Physiology, New York Medical College, Valhalla, New York
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Patel D, Alhawaj R, Wolin MS. Exposure of mice to chronic hypoxia attenuates pulmonary arterial contractile responses to acute hypoxia by increases in extracellular hydrogen peroxide. Am J Physiol Regul Integr Comp Physiol 2014; 307:R426-33. [PMID: 24920729 DOI: 10.1152/ajpregu.00257.2013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Exposing mice to a chronic hypoxic treatment (10% oxygen, 21 days) that promotes pulmonary hypertension was observed to attenuate the pulmonary vasoconstriction response to acute hypoxia (HPV) both in vivo and in isolated pulmonary arteries. Since catalase restored the HPV response in isolated arteries, it appeared to be attenuated by extracellular hydrogen peroxide. Chronic hypoxia promoted the detection of elevated lung superoxide, extracellular peroxide, extracellular SOD expression, and protein kinase G (PKG) activation [based on PKG dimerization and vasodilator-stimulated phosphoprotein (VASP) phosphorylation], suggesting increased generation of extracellular peroxide and PKG activation may contribute to the suppression of HPV. Aorta from mice exposed to 21 days of hypoxia also showed evidence for extracellular hydrogen peroxide, suppressing the relaxation response to acute hypoxia. Peroxide appeared to partially suppress contractions to phenylephrine used in the study of in vitro hypoxic responses. Treatment of mice with the heme precursor δ-aminolevulinic acid (ALA; 50 mg·kg(-1)·day(-1)) during exposure to chronic hypoxia was examined as a pulmonary hypertension therapy because it could potentially activate beneficial cGMP-mediated effects through promoting a prolonged protoporphyrin IX (PpIX)-elicited activation of soluble guanylate cyclase. ALA attenuated pulmonary hypertension, increases in both superoxide and peroxide, and the suppression of in vitro and in vivo HPV responses. ALA generated prolonged detectible increases in PpIX and PKG-associated phosphorylation of VASP, suggesting PKG activation may contribute to suppression of pulmonary hypertension and prevention of alterations in extracellular peroxide that appear to be attenuating HPV responses caused by chronic hypoxia.
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Affiliation(s)
- Dhara Patel
- Department of Physiology and Pulmonary Hypertension Center, New York Medical College, Valhalla, New York
| | - Raed Alhawaj
- Department of Physiology and Pulmonary Hypertension Center, New York Medical College, Valhalla, New York
| | - Michael S Wolin
- Department of Physiology and Pulmonary Hypertension Center, New York Medical College, Valhalla, New York
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D'Agostino J, Ding X, Zhang P, Jia K, Fang C, Zhu Y, Spink DC, Zhang QY. Potential biological functions of cytochrome P450 reductase-dependent enzymes in small intestine: novel link to expression of major histocompatibility complex class II genes. J Biol Chem 2012; 287:17777-17788. [PMID: 22453923 DOI: 10.1074/jbc.m112.354274] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
NADPH-cytochrome P450 reductase (POR) is essential for the functioning of microsomal cytochrome P450 (P450) monooxygenases and heme oxygenases. The biological roles of the POR-dependent enzymes in the intestine have not been defined, despite the wealth of knowledge on the biochemical properties of the various oxygenases. In this study, cDNA microarray analysis revealed significant changes in gene expression in enterocytes isolated from the small intestine of intestinal epithelium-specific Por knock-out (named IE-Cpr-null) mice compared with that observed in wild-type (WT) littermates. Gene ontology analyses revealed significant changes in terms related to P450s, transporters, cholesterol biosynthesis, and, unexpectedly, antigen presentation/processing. The genomic changes were confirmed at either mRNA or protein level for selected genes, including those of the major histocompatibility complex class II (MHC II). Cholesterol biosynthetic activity was greatly reduced in the enterocytes of the IE-Cpr-null mice, as evidenced by the accumulation of the lanosterol metabolite, 24-dihydrolanosterol. However, no differences in either circulating or enterocyte cholesterol levels were observed between IE-Cpr-null and WT mice. Interestingly, the levels of the cholesterol precursor farnesyl pyrophosphate and its derivative geranylgeranyl pyrophosphate were also increased in the enterocytes of the IE-Cpr-null mice. Furthermore, the expression of STAT1 (signal transducer and activator of transcription 1), a downstream target of geranylgeranyl pyrophosphate signaling, was enhanced. STAT1 is an activator of CIITA, the class II transactivator for MHC II expression; CIITA expression was concomitantly increased in IE-Cpr-null mice. Overall, these findings provide a novel and mechanistic link between POR-dependent enzymes and the expression of MHC II genes in the small intestine.
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Affiliation(s)
- Jaime D'Agostino
- Wadsworth Center, New York State Department of Health, and School of Public Health, State University of New York, Albany, New York 12201-0509
| | - Xinxin Ding
- Wadsworth Center, New York State Department of Health, and School of Public Health, State University of New York, Albany, New York 12201-0509
| | - Peng Zhang
- Wadsworth Center, New York State Department of Health, and School of Public Health, State University of New York, Albany, New York 12201-0509
| | - Kunzhi Jia
- Wadsworth Center, New York State Department of Health, and School of Public Health, State University of New York, Albany, New York 12201-0509
| | - Cheng Fang
- Wadsworth Center, New York State Department of Health, and School of Public Health, State University of New York, Albany, New York 12201-0509
| | - Yi Zhu
- Wadsworth Center, New York State Department of Health, and School of Public Health, State University of New York, Albany, New York 12201-0509
| | - David C Spink
- Wadsworth Center, New York State Department of Health, and School of Public Health, State University of New York, Albany, New York 12201-0509
| | - Qing-Yu Zhang
- Wadsworth Center, New York State Department of Health, and School of Public Health, State University of New York, Albany, New York 12201-0509.
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Burgess A, Vanella L, Bellner L, Schwartzman ML, Abraham NG. Epoxyeicosatrienoic acids and heme oxygenase-1 interaction attenuates diabetes and metabolic syndrome complications. Prostaglandins Other Lipid Mediat 2012; 97:1-16. [PMID: 22100745 PMCID: PMC3261364 DOI: 10.1016/j.prostaglandins.2011.10.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2011] [Revised: 10/05/2011] [Accepted: 10/17/2011] [Indexed: 12/19/2022]
Abstract
MSCs are considered to be the natural precursors to adipocyte development through the process of adipogenesis. A link has been established between decreased protective effects of EETs or HO-1 and their interaction in metabolic syndrome. Decreases in HO-1 or EET were associated with an increase in adipocyte stem cell differentiation and increased levels of inflammatory cytokines. EET agonist (AKR-I-27-28) inhibited MSC-derived adipocytes and decreased the levels of inflammatory cytokines. We further describe the role of CYP-epoxygenase expression, HO expression, and circulating cytokine levels in an obese mouse, ob/ob(-/-) mouse model. Ex vivo measurements of EET expression within MSCs derived from ob/ob(-/-) showed decreased levels of EETs that were increased by HO induction. This review demonstrates that suppression of HO and EET systems exist in MSCs prior to the development of adipocyte dysfunction. Further, adipocyte dysfunction can be ameliorated by induction of HO-1 and CYP-epoxygenase, i.e. EET.
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Affiliation(s)
- Angela Burgess
- Department of Physiology and Pharmacology, University of Toledo College of Medicine, OH 43614
| | - Luca Vanella
- Department of Physiology and Pharmacology, University of Toledo College of Medicine, OH 43614
| | - Lars Bellner
- Department of Pharmacology, New York Medical College, Valhalla, NY, 10595
| | | | - Nader G. Abraham
- Department of Physiology and Pharmacology, University of Toledo College of Medicine, OH 43614
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Hemodynamic effects of orally administered delta-ALA during radical prostatectomy. World J Urol 2011; 31:371-6. [PMID: 22120180 DOI: 10.1007/s00345-011-0788-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2011] [Accepted: 10/12/2011] [Indexed: 10/15/2022] Open
Abstract
PURPOSE We investigated hemodynamics in patients receiving delta-Aminolevulinic acid (delta-ALA) to visualize tumor margins prior to radical retro pubic prostatectomy. PATIENTS Twenty patients undergoing elective open radical retro pubic prostatectomy (RRP). METHODS Cohort observational study. Ten patients receiving 20 mg/kg of delta-ALA orally prior to surgery (delta-ALA) and 10 patients undergoing RRP without the application of delta-ALA served as a retrospectively matched cohort (CONTROL). MEASUREMENTS Changes in heart rate (HR), mean arterial blood pressure (MAP), and functional hemodynamic parameters were assessed by electrocardiogram, non-invasive and invasive blood pressure monitoring plus transcardiopulmonary thermodilution. RESULTS Patients of both groups did not differ in means of age, body mass index, or ASA classification. During surgery, HR and MAP did not differ significantly between both groups. Also, the amount of IV crystalloids and colloids did not differ significantly. In contrast, the amount of vasopressor necessary to maintain MAP within the target range of 70-90 mmHg was significantly higher in delta-ALA when compared to CONTROL (0.08 ± 0.04 μg/kg/min (delta-ALA) vs. 0.03 ± 0.02 μg/kg/min (CONTROL); P < 0.01). Immediately after surgery, patients of delta-ALA showed a significantly higher heart rate (82 ± 18 min(-1) vs. 67 ± 9 min(-1); P < 0.05) compared to patients of CONTROL. Cardiac index, global end-diastolic volume index, and extravascular lung water index were significantly higher after surgery, when compared to baseline values (P < 0.05). CONCLUSIONS Orally administered delta-ALA prior to open radical prostatectomy induces hemodynamic instability in the perioperative period requiring vasopressor support. Further, an increase of extravascular lung water points toward an increased vascular permeability induced by delta-ALA.
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Abstract
Most current theories for the mechanism of hypoxic pulmonary vasoconstriction (HPV) include a role for reactive oxygen species and/or changes in redox regulation, but extreme controversy exists regarding which systems and redox changes mediate the HPV response. Nitric oxide (NO) appears to help to maintain low pulmonary arterial pressure, suppress HPV, and prevent the development of pulmonary hypertension. Our studies have found a key role for glucose-6-phosphate dehydrogenase in bovine pulmonary arterial smooth muscle functioning to maintain elevated levels of cytosolic NADPH which fuels the generation of vasodilator levels of hydrogen peroxide. HPV results from hypoxia removing vasodilation by peroxide. Decreased superoxide generation by Nox4 oxidase and its conversion to peroxide by Cu,Zn-SOD appear to be potential factors in sensing hypoxia, and decreased cGMP-associated vasodilation and removal of redox controlled vasodilator mechanisms by increased cytosolic NADPH may be key coordinators of the HPV response. Oxidant generation associated with vascular disease processes, including the removal of NO by superoxide, and attenuation of its ability to stimulate cGMP production by oxidation of the heme and thiols of soluble guanylate cyclase attenuate potential beneficial actions of NO on pulmonary arterial function. While pulmonary hypertension appears to have multiple poorly understood effects on redox-associated processes, potentially influencing responses to hypoxia and NO-cGMP signaling, much remains to be elucidated regarding how these processes may be important factors in the progression, expression and therapeutic treatment of pulmonary hypertension.
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Hoffmann LS, Schmidt PM, Keim Y, Schaefer S, Schmidt HHHW, Stasch JP. Distinct molecular requirements for activation or stabilization of soluble guanylyl cyclase upon haem oxidation-induced degradation. Br J Pharmacol 2009; 157:781-95. [PMID: 19466990 PMCID: PMC2721263 DOI: 10.1111/j.1476-5381.2009.00263.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2008] [Revised: 01/30/2009] [Accepted: 02/18/2009] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND AND PURPOSE In endothelial dysfunction, signalling by nitric oxide (NO) is impaired because of the oxidation and subsequent loss of the soluble guanylyl cyclase (sGC) haem. The sGC activator 4-[((4-carboxybutyl){2-[(4-phenethylbenzyl)oxy]phenethyl}amino)methyl[benzoic]acid (BAY 58-2667) is a haem-mimetic able to bind with high affinity to sGC when the native haem (the NO binding site) is removed and it also protects sGC from ubiquitin-triggered degradation. Here we investigate whether this protection is a unique feature of BAY 58-2667 or a general characteristic of haem-site ligands such as the haem-independent sGC activator 5-chloro-2-(5-chloro-thiophene-2-sulphonylamino-N-(4-(morpholine-4-sulphonyl)-phenyl)-benzamide sodium salt (HMR 1766), the haem-mimetic Zn-protoporphyrin IX (Zn-PPIX) or the haem-dependent sGC stimulator 5-cyclopropyl-2-[1-(2-fluoro-benzyl)-1H-pyrazolo[3,4-b]pyridin-3-yl]-pyrimidin-4-ylamine (BAY 41-2272). EXPERIMENTAL APPROACH The sGC inhibitor 1H-(1,2,4)-oxadiazolo[4,3-a]quinoxalin-1-one (ODQ) was used to induce oxidation-induced degradation of sGC. Activity and protein levels of sGC were measured in a Chinese hamster ovary cell line as well as in primary porcine endothelial cells. Cells expressing mutant sGC were used to elucidate the molecular mechanism underlying the effects observed. KEY RESULTS Oxidation-induced sGC degradation was prevented by BAY 58-2667 and Zn-PPIX in both cell types. In contrast, the structurally unrelated sGC activator, HMR 1766, and the sGC stimulator, BAY 41-2272, did not protect. Similarly, the constitutively haem-free sGC mutant beta(1)H105F was stabilized by BAY 58-2667 and Zn-PPIX. CONCLUSIONS The ability of BAY 58-2667 not only to activate but also to stabilize oxidized/haem-free sGC represents a unique example of bimodal target interaction and distinguishes this structural class from non-stabilizing sGC activators and sGC stimulators such as HMR 1766 and BAY 41-2272, respectively.
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Affiliation(s)
- L S Hoffmann
- Pharma Research Centre, Bayer HealthCare, Aprather Weg 18a, Wuppertal, Germany
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Abstract
Heme oxygenase (HO) is important in attenuating the overall production of reactive oxygen species through its ability to degrade heme and to produce carbon monoxide, biliverdin/bilirubin, and release of free iron. Excess free heme catalyzes the formation of reactive oxygen species, which leads to endothelial cell (EC) dysfunction as seen in numerous pathologic vascular conditions including systemic hypertension and diabetes, as well as in ischemia/reperfusion injury.The up-regulation of HO-1 can be achieved through the use of pharmaceutical agents such as metalloporphyrins and statins. In addition, atrial natriuretic peptide and nitric oxide donors are important modulators of the heme-HO system, either through induction of HO-1 or the increased biologic activity of its products. Gene therapy and gene transfer, including site- and organ-specific targeted gene transfer have become powerful tools for studying the potential role of the 2 isoforms of HO, HO-1/HO-2, in the treatment of cardiovascular disease, as well as diabetes. HO-1 induction by pharmacological agents or the in vitro gene transfer of human HO-1 into ECs increases cell cycle progression and attenuates angiotensin II, tumor necrosis factor-alpha, and heme-mediated DNA damage; administration in vivo corrects blood pressure elevation after angiotensin II exposure. Delivery of human HO-1 to hyperglycemic rats significantly lowers superoxide levels and prevents EC damage and sloughing of vascular EC into the circulation. In addition, administration of human HO-1 to rats in advance of ischemia/reperfusion injury considerably reduces tissue damage.The ability to up-regulate HO-1 either through pharmacological means or through the use of gene therapy may offer therapeutic strategies for the prevention of cardiovascular disease in the future. This review discusses the implications of HO-1 delivery during the early stages of cardiovascular system injury or in early vascular pathology, and suggests that pharmacological agents that regulate HO activity or HO-1 gene delivery itself may become powerful tools for preventing the onset or progression of various cardiovascular diseases.
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Pearce WJ, Williams JM, White CR, Lincoln TM. Effects of chronic hypoxia on soluble guanylate cyclase activity in fetal and adult ovine cerebral arteries. J Appl Physiol (1985) 2009; 107:192-9. [PMID: 19407253 DOI: 10.1152/japplphysiol.00233.2009] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
A broad variety of evidence obtained largely in pulmonary vasculature suggests that chronic hypoxia modulates vasoreactivity to nitric oxide (NO). The present study explores the general hypothesis that chronic hypoxia also modulates cerebrovascular reactivity to NO, and does so by modulating the activity of soluble guanylate cyclase (sGC), the primary target for NO in vascular smooth muscle. Pregnant and nonpregnant ewes were maintained at either sea level or at 3,820 m for the final 110 days of gestation, at which time middle cerebral arteries from term fetal lambs and nonpregnant adults were harvested. In both fetal and adult arteries, NO-induced vasodilatation was attenuated by chronic hypoxia and completely inhibited by 10 microM 1H-[1,2,4]oxadiazolo[4,3-a]quinoxalin-1-one (ODQ), a selective inhibitor of sGC. sGC abundance (in ng sGC/mg protein) measured via Western immunoblots was approximately 10-fold greater in fetal (17.6 +/- 1.6) than adult (1.7 +/- 0.3) arteries but was not affected by chronic hypoxia. The specific activity of sGC (in pmol cGMP.microg sGC(-1).min(-1)) was similar in fetal (255 +/- 64) and adult (280 +/- 75) arteries and was inhibited by chronic hypoxia in both fetal (120 +/- 10) and adult (132 +/- 26) arteries. Rates of cGMP degradation (in pmol cGMP.mg protein(-1).min(-1)) were similar in fetal (159 +/- 59) and adult (134 +/- 36) arteries but were not significantly depressed by chronic hypoxia in either fetal (115 +/- 25) or adult (108 +/- 25) arteries. The cGMP analog 8-(p-chlorophenylthio)-cGMP was a more potent vasorelaxant in fetal (pD(2) = 4.7 +/- 0.1) than adult (pD(2) = 4.3 +/- 0.1) arteries, but its ability to promote vasodilatation was not affected by chronic hypoxia in either age group. Together, these results reveal that hypoxic inhibition of NO-induced vasodilatation is attributable largely to attenuation of the specific activity of sGC and does not involve significant changes in sGC abundance, cGMP-phosphodiesterase activity, or the vasorelaxant activity of protein kinase G.
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Affiliation(s)
- William J Pearce
- Department of Physiology, Center for Perinatal Biology, Loma Linda Univ. School of Medicine, Loma Linda, CA 92350, USA.
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Abstract
Here, we review the early studies on cGMP, guanylyl cyclases, and cGMP-dependent protein kinases to facilitate understanding of development of this exciting but complex field of research encompassing pharmacology, biochemistry, physiology, and molecular biology of these important regulatory molecules.
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Abstract
This article summarizes perspectives on how reactive oxygen species (ROS) and redox signaling mechanisms participate in regulating vascular smooth muscle function that have resulted from our studies over the past 25 years in areas including oxygen sensing and the regulation of cGMP production by soluble guanylate cyclase (sGC) that were presented in the Robert M. Berne Distinguished Lectureship at the 2008 Experimental Biology Meeting. It considers mechanisms controlling the activity of sources of ROS including Nox oxidases and mitochondria by physiological stimuli, vascular diseases processes, and metabolic mechanisms linked to NAD(P)H redox and hypoxia. Metabolic interactions of individual ROS such as hydrogen peroxide with cellular peroxide metabolizing enzymes are viewed as some of the most sensitive ways of influencing cellular signaling systems. The control of cytosolic NADPH redox also seems to be a major contributor to bovine coronary arterial relaxation to hypoxia, where its oxidation functions to coordinate the lowering of intracellular calcium, whereas increased cytosolic NADPH generation in pulmonary arteries appears to maintain elevated Nox oxidase activity, and relaxation to hydrogen peroxide, which is attenuated by hypoxia. The sensitivity of sGC to nitric oxide seems to be regulated by thiol and heme redox systems controlled by cytosolic NADPH. Heme biosynthesis and metabolism are also important factors regulating the sGC system. The signaling pathways controlling oxidases and their colocalization with redox-regulated systems enables selective activation of numerous regulatory mechanisms influencing vascular function in physiological processes and the progression of aging-associated vascular diseases.
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Affiliation(s)
- Michael S Wolin
- Dept. of Physiology, Basic Science Bldg., Rm 604, New York Medical College, Valhalla, NY 10595, USA.
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Maron BA, Zhang YY, Handy DE, Beuve A, Tang SS, Loscalzo J, Leopold JA. Aldosterone increases oxidant stress to impair guanylyl cyclase activity by cysteinyl thiol oxidation in vascular smooth muscle cells. J Biol Chem 2009; 284:7665-72. [PMID: 19141618 DOI: 10.1074/jbc.m809460200] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Hyperaldosteronism is associated with impaired endothelium-dependent vascular reactivity owing to increased reactive oxygen species and decreased bioavailable nitric oxide (NO(.)); however, the effects of aldosterone on vasodilatory signaling pathways in vascular smooth muscle cells (VSMC) remain unknown. Soluble guanylyl cyclase (GC) is a heterodimer that is activated by NO(.) to convert cytosolic GTP to cGMP, a second messenger required for normal VSMC relaxation. Here, we show that aldosterone (10(-9)-10(-7) mol/liter) diminishes GC activity by activating NADPH oxidase in bovine aortic VSMC to increase reactive oxygen species levels and induce oxidative posttranslational modification(s) of Cys-122, a beta(1)-subunit cysteinyl residue demonstrated previously to modulate NO(.) sensing by GC. In VSMC treated with aldosterone, Western immunoblotting detected evidence of GC beta(1)-subunit disulfide bonding, whereas mass spectrometry analysis of a homologous peptide containing the Cys-122-bearing sequence exposed to conditions of increased oxidant stress confirmed cysteinyl sulfinic acid (m/z 435), sulfonic acid (m/z 443), and disulfide (m/z 836) bond formation. The functional effect of these modifications was examined by transfecting COS-7 cells with wild-type GC or mutant GC containing an alanine substitution at Cys-122 (C122A). Exposure to aldosterone or hydrogen peroxide (H(2)O(2)) significantly decreased cGMP levels in cells expressing wild-type GC. In contrast, aldosterone or H(2)O(2) did not influence cGMP levels in cells expressing the mutant C122A GC, confirming that oxidative modification of Cys-122 specifically impairs GC activity. These findings demonstrate that pathophysiologically relevant concentrations of aldosterone increase oxidant stress to convert GC to an NO(.)-insensitive state, resulting in disruption of normal vasodilatory signaling pathways in VSMC.
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Affiliation(s)
- Bradley A Maron
- Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
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Schmidt HHHW, Schmidt PM, Stasch JP. NO- and haem-independent soluble guanylate cyclase activators. Handb Exp Pharmacol 2009:309-339. [PMID: 19089335 DOI: 10.1007/978-3-540-68964-5_14] [Citation(s) in RCA: 112] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Oxidative stress, a risk factor for several cardiovascular disorders, interferes with the NO/sGC/cGMP signalling pathway through scavenging of NO and formation of the strong intermediate oxidant, peroxynitrite. Under these conditions, endothelial and vascular dysfunction develops, culminating in different cardio-renal and pulmonary-vascular diseases. Substituting NO with organic nitrates that release NO (NO donors) has been an important principle in cardiovascular therapy for more than a century. However, the development of nitrate tolerance limits their continuous clinical application and, under oxidative stress and increased formation of peroxynitrite foils the desired therapeutic effect. To overcome these obstacles of nitrate therapy, direct NO- and haem-independent sGC activators have been developed, such as BAY 58-2667 (cinaciguat) and HMR1766 (ataciguat), showing unique biochemical and pharmacological properties. Both compounds are capable of selectively activating the oxidized/haem-free enzyme via binding to the enzyme's haem pocket, causing pronounced vasodilatation. The potential importance of these new drugs resides in the fact that they selectively target a modified state of sGC that is prevalent under disease conditions as shown in several animal models and human disease. Activators of sGC may be beneficial in the treatment of a range of diseases including systemic and pulmonary hypertension (PH), heart failure, atherosclerosis, peripheral arterial occlusive disease (PAOD), thrombosis and renal fibrosis. The sGC activator HMR1766 is currently in clinical development as an oral therapy for patients with PAOD. The sGC activator BAY 58-2667 has demonstrated efficacy in a proof-of-concept study in patients with acute decompensated heart failure (ADHF), reducing pre- and afterload and increasing cardiac output from baseline. A phase IIb clinical study for the indication of ADHF is currently underway.
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Affiliation(s)
- Harald H H W Schmidt
- Department of Pharmacology and Centre for Vascular Health, Monash University, Clayton, VIC, 3800, Australia
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