1
|
Yano D, Ohsawa I, Suga Y, Mitsuishi T. Unusual clinical presentation of extragenital condyloma acuminatum. J Dermatol 2024. [PMID: 38433364 DOI: 10.1111/1346-8138.17184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 01/15/2024] [Accepted: 02/19/2024] [Indexed: 03/05/2024]
Affiliation(s)
- Daisuke Yano
- Department of Dermatology, Japanese Red Cross Saitama Hospital, Chuo-ku, Saitama, Japan
- Department of Dermatology, Juntendo University Urayasu Hospital, Urayasu, Chiba, Japan
| | - Ikuroh Ohsawa
- Department of Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - Yasushi Suga
- Department of Dermatology, Juntendo University Urayasu Hospital, Urayasu, Chiba, Japan
| | - Tsuyoshi Mitsuishi
- Department of Dermatology, Japanese Red Cross Saitama Hospital, Chuo-ku, Saitama, Japan
| |
Collapse
|
2
|
Usami T, Ohsawa I, Suga Y, Mitsuishi T. Human papillomavirus type 94-associated flat warts and review of reported cases. J Dermatol 2024; 51:95-97. [PMID: 37698040 DOI: 10.1111/1346-8138.16962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 08/10/2023] [Accepted: 08/30/2023] [Indexed: 09/13/2023]
Abstract
To date, 10 types of human papillomavirus have been identified that cause flat warts, including human papillomavirus type 3, which belongs to species group 2 of the genus alpha papillomavirus. Among these 10 types, human papillomavirus type 94 is most closely related to human papillomavirus type 10, sharing 86% homology. In this study, we conducted polymerase chain reaction analysis with sequencing on samples obtained from cutaneous lesions located on the face and lower legs of an individual, revealing the presence of human papillomavirus type 94. Dermatoscopic findings revealed numerous dotted vessels within one group of macular brown lesions located on the lower leg, which contributed to the diagnosis of flat warts. An online search revealed that human papillomavirus type 94 has previously been detected in various skin diseases, and we provide a review of prior reports.
Collapse
Affiliation(s)
- Tamae Usami
- Department of Dermatology, Juntendo University Urayasu, Hospital, Chiba, Japan
- Department of Dermatology, Japanese Red Cross Saitama Hospital, Saitama, Japan
| | - Ikuroh Ohsawa
- Department of Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - Yasushi Suga
- Department of Dermatology, Juntendo University Urayasu, Hospital, Chiba, Japan
| | - Tsuyoshi Mitsuishi
- Department of Dermatology, Japanese Red Cross Saitama Hospital, Saitama, Japan
| |
Collapse
|
3
|
Shimamura A, Ohsawa I, Mitsuishi T. Multiple human papillomavirus-associated plantar epidermoid cysts. Eur J Dermatol 2023; 33:693-694. [PMID: 38465555 DOI: 10.1684/ejd.2023.4550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Affiliation(s)
- Akari Shimamura
- Department of Dermatology, Dokkyo Medical University, Saitama Hospital, Koshigaya, Saitama, Japan, Department of Dermatology, Japanese Red Cross Saitama Hospital, Saitama, Japan
| | - Ikuroh Ohsawa
- Department of Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - Tsuyoshi Mitsuishi
- Department of Dermatology, Japanese Red Cross Saitama Hospital, Saitama, Japan
| |
Collapse
|
4
|
Aokage T, Iketani M, Seya M, Meng Y, Ageta K, Naito H, Nakao A, Ohsawa I. Attenuation of pulmonary damage in aged lipopolysaccharide-induced inflammation mice through continuous 2 % hydrogen gas inhalation: A potential therapeutic strategy for geriatric inflammation and survival. Exp Gerontol 2023; 180:112270. [PMID: 37572992 DOI: 10.1016/j.exger.2023.112270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Revised: 08/08/2023] [Accepted: 08/09/2023] [Indexed: 08/14/2023]
Abstract
INTRODUCTION With the global population aging, there is an increased prevalence of sepsis among the elderly, a demographic particularly susceptible to inflammation. This study aimed to evaluate the therapeutic potential of hydrogen gas, known for its anti-inflammatory and antioxidant properties, in attenuating inflammation specifically in the lungs and liver, and age-associated molecular markers in aged mice. METHODS Male mice aged 21 to 23 months, representative of the human elderly population, were subjected to inflammation via intraperitoneal injection of lipopolysaccharide (LPS). The mice were allocated into eight groups to examine the effects of varying durations and concentrations of hydrogen gas inhalation: control, saline without hydrogen, saline with 24-hour 2 % hydrogen, LPS without hydrogen, LPS with 24-hour 2 % hydrogen, LPS with 6-hour 2 % hydrogen, LPS with 1-hour 2 % hydrogen, and LPS with 24-hour 1 % hydrogen. Parameters assessed included survival rate, activity level, inflammatory biomarkers, and organ injury. RESULTS Extended administration of hydrogen gas specifically at a 2 % concentration for 24 h led to a favorable prognosis in the aged mice by reducing mRNA expression of inflammatory biomarkers in lung and liver tissue, mitigating lung injury, and diminishing the expression of the senescence-associated protein p21. Moreover, hydrogen gas inhalation selectively ameliorated senescence-related markers in lung tissue, including C-X-C motif chemokine 2, metalloproteinase-3, and arginase-1. Notably, hydrogen gas did not alleviate LPS-induced liver injury under the conditions tested. CONCLUSION The study highlights that continuous inhalation of hydrogen gas at a 2 % concentration for 24 h can be a potent intervention in the geriatric population for improving survival and physical activity by mitigating pulmonary inflammation and modulating senescence-related markers in aged mice with LPS-induced inflammation. This finding paves the way for future research into hydrogen gas as a therapeutic strategy to alleviate severe inflammation that can lead to organ damage in the elderly.
Collapse
Affiliation(s)
- Toshiyuki Aokage
- Department of Emergency, Critical Care and Disaster Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan; Biological Process of Aging, Tokyo Metropolitan Institute for Geriatrics and Gerontology, Tokyo, Japan.
| | - Masumi Iketani
- Biological Process of Aging, Tokyo Metropolitan Institute for Geriatrics and Gerontology, Tokyo, Japan
| | - Mizuki Seya
- Department of Emergency, Critical Care and Disaster Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Ying Meng
- Department of Emergency, Critical Care and Disaster Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Kohei Ageta
- Department of Emergency, Critical Care and Disaster Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Hiromichi Naito
- Department of Emergency, Critical Care and Disaster Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Atsunori Nakao
- Department of Emergency, Critical Care and Disaster Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Ikuroh Ohsawa
- Biological Process of Aging, Tokyo Metropolitan Institute for Geriatrics and Gerontology, Tokyo, Japan
| |
Collapse
|
5
|
Fujita Y, Shinkai S, Taniguchi Y, Miura Y, Tanaka M, Ohsawa I, Kitamura A, Ito M. Association Between Serum GDF15 Concentration and Total Mortality in Community-Dwelling Japanese Older Populations: The Involvement of Renal Dysfunction. J Gerontol A Biol Sci Med Sci 2023; 78:1701-1707. [PMID: 37190783 DOI: 10.1093/gerona/glad105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Indexed: 05/17/2023] Open
Abstract
BACKGROUND Serum growth differentiation factor 15 (GDF15) is associated with age-related adverse outcomes. However, renal function has not been thoroughly evaluated in studies addressing the association between GDF15 and mortality. We aimed to clarify whether GDF15 is associated with total mortality after carefully controlling renal function markers. METHODS We divided 1 801 community-dwelling Japanese older adults into quartiles according to their serum GDF15 concentrations. The correlation of GDF15 with renal function and inflammation markers was assessed by calculating Spearman correlation coefficients. Cumulative survival rates of the quartiles were estimated. In a Cox regression analysis adjusted for confounders, the association between GDF15 and mortality was evaluated. The discriminative capacity of GDF15 for the prediction of mortality was assessed with receiver-operating characteristic analysis. RESULTS GDF15 was correlated with cystatin C (r = 0.394), β2-microglobulin (r = 0.382), C-reactive protein (r = 0.124), and interleukin-6 (r = 0.166). The highest GDF15 quartile showed poor survival compared to the others. Older adults with higher GDF15 were associated with an increased mortality risk, independent of demographics and clinically relevant variables (hazard ratio [95% confidence interval]: 1.98 [1.09-3.59]). This significant association disappeared when additionally adjusted for cystatin C (1.65 [0.89-3.05]) or β2-microglobulin (1.69 [0.91-3.12]). The ability to predict mortality was approximately comparable between GDF15 (area under the curve: 0.667), cystatin C (0.691), and β2-microglobulin (0.715). CONCLUSIONS Serum GDF15 is associated with total mortality in older Japanese after adjustment for major confounders. The increased mortality risk in older adults with higher GDF15 may be partly attributed to decreased renal function.
Collapse
Affiliation(s)
- Yasunori Fujita
- Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - Shoji Shinkai
- Graduate School of Nutrition and Health Science, Kagawa Nutrition University, Sakado, Saitama, Japan
- Research Team for Social Participation and Community Health, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - Yu Taniguchi
- Japan Environment and Children's Study Programme Office, National Institute for Environmental Studies, Tsukuba, Ibaraki, Japan
| | - Yuri Miura
- Research Team for Mechanism of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - Masashi Tanaka
- Department of Neurology, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Ikuroh Ohsawa
- Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - Akihiko Kitamura
- Research Team for Social Participation and Community Health, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
- Health Town Development Science Center, Yao City Health Center, Yao, Osaka, Japan
| | - Masafumi Ito
- Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| |
Collapse
|
6
|
Abstract
Molecular hydrogen (H2) is an antioxidant and anti-inflammatory agent; however, the molecular mechanisms underlying its biological effects are largely unknown. Similar to other gaseous molecules such as inhalation anesthetics, H2 is more soluble in lipids than in water. A recent study demonstrated that H2 reduces radical polymerization-induced cellular damage by suppressing fatty acid peroxidation and membrane permeability. Thus, we sought to examine the effects of short exposure to H2 on lipid composition and associated physiological changes in SH-SY5Y neuroblastoma cells. We analyzed cells by liquid chromatography-high-resolution mass spectrometry to define changes in lipid components. Lipid class analysis of cells exposed to H2 for 1 hour revealed transient increases in glycerophospholipids including phosphatidylethanolamine, phosphatidylinositol, and cardiolipin. Metabolomic analysis also showed that H2 exposure for 1 hour transiently suppressed overall energy metabolism accompanied by a decrease in glutathione. We further observed alterations to endosomal morphology by staining with specific antibodies. Endosomal transport of cholera toxin B to recycling endosomes localized around the Golgi body was delayed in H2-exposed cells. We speculate that H2-induced modification of lipid composition depresses energy production and endosomal transport concomitant with enhancement of oxidative stress, which transiently stimulates stress response pathways to protect cells.
Collapse
Affiliation(s)
- Masumi Iketani
- Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - Iwao Sakane
- Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan,Central Research Institute, ITO EN Ltd., Shizuoka, Japan
| | - Yasunori Fujita
- Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - Masafumi Ito
- Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - Ikuroh Ohsawa
- Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan,Correspondence to: Ikuroh Ohsawa, E-mail:
| |
Collapse
|
7
|
Fujita Y, Iketani M, Ito M, Ohsawa I. Temporal changes in mitochondrial function and reactive oxygen species generation during the development of replicative senescence in human fibroblasts. Exp Gerontol 2022; 165:111866. [DOI: 10.1016/j.exger.2022.111866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 05/12/2022] [Accepted: 06/01/2022] [Indexed: 11/04/2022]
|
8
|
Yoneda M, Aklima J, Ohsawa I, Ohta Y. Effects of proton pumping on the structural rigidity of cristae in mitochondria. Arch Biochem Biophys 2022; 720:109172. [PMID: 35276212 DOI: 10.1016/j.abb.2022.109172] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 03/06/2022] [Accepted: 03/07/2022] [Indexed: 02/08/2023]
Abstract
Mitochondria change their morphology and inner membrane structure depending on their activity. Since mitochondrial activity also depends on their structure, it is important to elucidate the interrelationship between the activity and structure of mitochondria. However, the mechanism by which mitochondrial activity affects the structure of cristae, the folded structure of the inner membrane, is not well understood. In this study, the effect of the mitochondrial activity on the cristae structure was investigated by examining the structural rigidity of cristae. Taking advantage of the fact that unfolding of cristae induces mitochondrial swelling, we investigated the relationship between mitochondrial activity and the susceptibility to swelling. The swelling of individual isolated mitochondria exposed to a hypotonic solution was observed with an optical microscope. The presence of respiratory substrates (malate and glutamate) increased the percentage of mitochondria that underwent swelling, and the further addition of rotenone or KCN (inhibitors of proton pumps) reversed the increase. In the absence of respiratory substrates, acidification of the buffer surrounding the mitochondria also increased the percentage of swollen mitochondria. These observations suggest that acidification of the outer surface of inner membranes, especially intracristal space, by proton translocation from the matrix to the intracristal space, decreases the structural rigidity of the cristae. This interpretation was verified by the observation that ADP or CCCP, which induces proton re-entry to the matrix, suppressed the mitochondrial swelling in the presence of respiratory substrates. The addition of CCCP to the cells induced a morphological change in mitochondria from an initial elongated structure to a largely curved structure at pH 7.4, but there were no morphological changes when the pH of the cytosol dropped to 6.2. These results suggest that a low pH in the intracristal space may be helpful in maintaining the elongated structure of mitochondria. The present study shows that proton pumping by the electron transfer chain is the mechanism underlying mitochondrial morphology and the flexibility of cristae structure.
Collapse
Affiliation(s)
- Mayu Yoneda
- Division of Biotechnology and Life Sciences, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo, 184-8588, Japan
| | - Jannatul Aklima
- Division of Biotechnology and Life Sciences, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo, 184-8588, Japan; Department of Biochemistry & Molecular Biology, University of Chittagong, Chittagong, 4331, Bangladesh
| | - Ikuroh Ohsawa
- Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Itabashi, Tokyo, 173-0015, Japan
| | - Yoshihiro Ohta
- Division of Biotechnology and Life Sciences, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo, 184-8588, Japan.
| |
Collapse
|
9
|
Aokage T, Seya M, Hirayama T, Nojima T, Iketani M, Ishikawa M, Terasaki Y, Taniguchi A, Miyahara N, Nakao A, Ohsawa I, Naito H. The effects of inhaling hydrogen gas on macrophage polarization, fibrosis, and lung function in mice with bleomycin-induced lung injury. BMC Pulm Med 2021; 21:339. [PMID: 34719405 PMCID: PMC8559370 DOI: 10.1186/s12890-021-01712-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 10/25/2021] [Indexed: 01/08/2023] Open
Abstract
Background Acute respiratory distress syndrome, which is caused by acute lung injury, is a destructive respiratory disorder caused by a systemic inflammatory response. Persistent inflammation results in irreversible alveolar fibrosis. Because hydrogen gas possesses anti-inflammatory properties, we hypothesized that daily repeated inhalation of hydrogen gas could suppress persistent lung inflammation by inducing functional changes in macrophages, and consequently inhibit lung fibrosis during late-phase lung injury. Methods To test this hypothesis, lung injury was induced in mice by intratracheal administration of bleomycin (1.0 mg/kg). Mice were exposed to control gas (air) or hydrogen (3.2% in air) for 6 h every day for 7 or 21 days. Respiratory physiology, tissue pathology, markers of inflammation, and macrophage phenotypes were examined. Results Mice with bleomycin-induced lung injury that received daily hydrogen therapy for 21 days (BH group) exhibited higher static compliance (0.056 mL/cmH2O, 95% CI 0.047–0.064) than mice with bleomycin-induced lung injury exposed only to air (BA group; 0.042 mL/cmH2O, 95% CI 0.031–0.053, p = 0.02) and lower static elastance (BH 18.8 cmH2O/mL, [95% CI 15.4–22.2] vs. BA 26.7 cmH2O/mL [95% CI 19.6–33.8], p = 0.02). When the mRNA levels of pro-inflammatory cytokines were examined 7 days after bleomycin administration, interleukin (IL)-6, IL-4 and IL-13 were significantly lower in the BH group than in the BA group. There were significantly fewer M2-biased macrophages in the alveolar interstitium of the BH group than in the BA group (3.1% [95% CI 1.6–4.5%] vs. 1.1% [95% CI 0.3–1.8%], p = 0.008). Conclusions The results suggest that hydrogen inhalation inhibits the deterioration of respiratory physiological function and alveolar fibrosis in this model of lung injury. Supplementary Information The online version contains supplementary material available at 10.1186/s12890-021-01712-2.
Collapse
Affiliation(s)
- Toshiyuki Aokage
- Department of Emergency, Critical Care and Disaster Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama-shi, Okayama, 700-8558, Japan
| | - Mizuki Seya
- Department of Emergency, Critical Care and Disaster Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama-shi, Okayama, 700-8558, Japan
| | - Takahiro Hirayama
- Department of Disaster Medicine and Management, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Tsuyoshi Nojima
- Department of Primary Care and Medical Education, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Masumi Iketani
- Department of Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - Michiko Ishikawa
- Department of Emergency, Disaster and Critical Care Medicine, Hyogo College of Medicine, Nishinomiya, Japan
| | - Yasuhiro Terasaki
- Department of Analytic Human Pathology, Nippon Medical School, Tokyo, Japan
| | - Akihiko Taniguchi
- Department of Hematology, Oncology, and Respiratory Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Nobuaki Miyahara
- Department of Medical Technology, Okayama University Graduate School of Health Sciences, Okayama, Japan
| | - Atsunori Nakao
- Department of Emergency, Critical Care and Disaster Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama-shi, Okayama, 700-8558, Japan
| | - Ikuroh Ohsawa
- Department of Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - Hiromichi Naito
- Department of Emergency, Critical Care and Disaster Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama-shi, Okayama, 700-8558, Japan.
| |
Collapse
|
10
|
Ohsawa I. Biological Responses to Hydrogen Molecule and its Preventive Effects on Inflammatory Diseases. Curr Pharm Des 2021; 27:659-666. [PMID: 32981496 DOI: 10.2174/1381612826666200925123510] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 08/09/2020] [Indexed: 11/22/2022]
Abstract
Because multicellular organisms do not have hydrogenase, H2 has been considered to be biologically inactive in these species, and enterobacteria to be largely responsible for the oxidation of H2 taken into the body. However, we showed previously that inhalation of H2 markedly suppresses brain injury induced by focal ischemia-reperfusion by buffering oxidative stress. Although the reaction constant of H2 with hydroxyl radical in aqueous solution is two to three orders of magnitude lower than that of conventional antioxidants, we showed that hydroxyl radical generated by the Fenton reaction reacts with H2 at room temperature without a catalyst. Suppression of hydroxyl radical by H2 has been applied in ophthalmic surgery. However, many of the anti- inflammatory and other therapeutic effects of H2 cannot be completely explained by its ability to scavenge reactive oxygen species. H2 administration is protective in several disease models, and preculture in the presence of H2 suppresses oxidative stress-induced cell death. Specifically, H2 administration induces mitochondrial oxidative stress and activates Nrf2; this phenomenon, in which mild mitochondrial stress leaves the cell less susceptible to subsequent perturbations, is called mitohormesis. Based on these findings, we conclude that crosstalk between antioxidative stress pathways and the anti-inflammatory response is the most important molecular mechanism involved in the protective function of H2, and that regulation of the immune system underlies H2 efficacy. For further medical applications of H2, it will be necessary to identify the biomolecule on which H2 first acts.
Collapse
Affiliation(s)
- Ikuroh Ohsawa
- Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| |
Collapse
|
11
|
Arima T, Igarashi T, Uchiyama M, Kobayashi M, Ohsawa I, Shimizu A, Takahashi H. Hydrogen promotes the activation of Cu, Zn superoxide dismutase in a rat corneal alkali-burn model. Int J Ophthalmol 2020; 13:1173-1179. [PMID: 32821669 DOI: 10.18240/ijo.2020.08.01] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Accepted: 05/12/2020] [Indexed: 12/23/2022] Open
Abstract
AIM To investigate the effects of hydrogen (H2) on Cu, Zn superoxide dismutase (SOD1) activation in a rat model of corneal alkali burn. METHODS In each rat, one cornea was subjected to alkali exposure. Physiological saline (saline group) or H2-dissolved saline (H2 group) was instilled continuously on the cornea for 5min before and after alkali exposure. Inflammatory cells, neovascularization, and cytoplasmic SOD1 levels were evaluated immunohistochemically in enucleated eyes from both groups. Three-dimensional ultrastructural tissue changes in the eyes were analyzed using low-vacuum scanning electron microscopy. RESULTS The numbers of both inflammatory and vascular endothelial cells were significantly reduced in the corneas of the H2 group (P<0.01). Furthermore, H2 treatment increased both cytoplasmic SOD1 levels (P<0.01) and activity in corneal epithelial cells (P<0.01). Notably, the SOD1 activity level in the H2 group was approximately 2.5-fold greater than that in the saline group. CONCLUSION H2 treatment suppresses inflammation and neovascularization in the injured cornea and indirectly suppresses oxidative insult to the cornea by upregulating the SOD1 enzyme protein level and activity.
Collapse
Affiliation(s)
- Takeshi Arima
- Department of Ophthalmology, Nippon Medical School, Tokyo 113-8602, Japan.,Department of Analytic Human Pathology, Nippon Medical School, Tokyo 113-8602, Japan
| | - Tsutomu Igarashi
- Department of Ophthalmology, Nippon Medical School, Tokyo 113-8602, Japan
| | - Masaaki Uchiyama
- Department of Ophthalmology, Nippon Medical School, Tokyo 113-8602, Japan
| | - Maika Kobayashi
- Department of Ophthalmology, Nippon Medical School, Tokyo 113-8602, Japan
| | - Ikuroh Ohsawa
- Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo 173-0015, Japan
| | - Akira Shimizu
- Department of Analytic Human Pathology, Nippon Medical School, Tokyo 113-8602, Japan
| | - Hiroshi Takahashi
- Department of Ophthalmology, Nippon Medical School, Tokyo 113-8602, Japan
| |
Collapse
|
12
|
Igarashi T, Ohsawa I, Kobayashi M, Umemoto Y, Arima T, Suzuki H, Igarashi T, Otsuka T, Takahashi H. Effects of Hydrogen in Prevention of Corneal Endothelial Damage During Phacoemulsification: A Prospective Randomized Clinical Trial. Am J Ophthalmol 2019; 207:10-17. [PMID: 31077667 DOI: 10.1016/j.ajo.2019.04.014] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 04/26/2019] [Accepted: 04/28/2019] [Indexed: 10/26/2022]
Abstract
PURPOSE Hydrogen (H2) has been reported to scavenge free radicals, particularly the hydroxyl radical (·OH). Ultrasound oscillation in an aqueous solution produces ·OH. Our recent study demonstrated that H2 dissolved in an irrigation solution prevented corneal endothelial damage during phacoemulsification in an animal model. We examined the effects of H2 during clinical phacoemulsification. DESIGN A single-center, prospective, randomized, double-masked clinical trial. METHODS Thirty-two patients who had cataracts of similar nucleus hardness in both eyes (age: 75.4±7.68 years; 17 males, 15 females) were recruited. Phacoemulsification was performed using a solution of dissolved H2 in one eye, and a conventional solution in the contralateral eye. Endothelial cell density (ECD) at the center of the cornea was measured using noncontact specular microscopy preoperatively and at 1 day, 1 week, and 3 weeks postoperatively. RESULTS Reduction rates of ECD (mean ± standard deviation) were 16.0%±15.7% at 1 day, 15.4%±16.1% at 1 week, and 18.4%±14.9% at 3 weeks in the control group, compared to 6.5%±8.7% at 1 day (P = .003), 9.3%±11.0% at 1 week (P = .039), and 8.5%±10.5% at 3 weeks (P = .004) in the H2 groups. These rates were significantly smaller in the H2 group at all time points. CONCLUSIONS H2 dissolved in irrigation solution reduced corneal endothelial damage during phacoemulsification. This suggests that a considerable part of the corneal endothelial damage during phacoemulsification is caused by oxidative stress, and that H2 is useful in clinical phacoemulsification.
Collapse
|
13
|
Terasaki Y, Terasaki M, Kanazawa S, Kokuho N, Urushiyama H, Kajimoto Y, Kunugi S, Maruyama M, Akimoto T, Miura Y, Igarashi T, Ohsawa I, Shimizu A. Effect of H 2 treatment in a mouse model of rheumatoid arthritis-associated interstitial lung disease. J Cell Mol Med 2019; 23:7043-7053. [PMID: 31424157 PMCID: PMC6787460 DOI: 10.1111/jcmm.14603] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 07/24/2019] [Accepted: 07/30/2019] [Indexed: 12/21/2022] Open
Abstract
Rheumatoid arthritis (RA)-associated interstitial lung disease (ILD), a primary cause of mortality in patients with RA, has limited treatment options. A previously established RA model in D1CC transgenic mice aberrantly expressed major histocompatibility complex class II genes in joints, developing collagen II-induced polyarthritis and anti-cyclic citrullinated peptide antibodies and interstitial pneumonitis, similar to those in humans. Molecular hydrogen (H2 ) is an efficient antioxidant that permeates cell membranes and alleviates the reactive oxygen species-induced injury implicated in RA pathogenesis. We used D1CC mice to analyse chronic lung fibrosis development and evaluate H2 treatment effects. We injected D1CC mice with type II collagen and supplied them with H2 -rich or control water until analysis. Increased serum surfactant protein D values and lung densities images were observed 10 months after injection. Inflammation was patchy within the perilymphatic stromal area, with increased 8-hydroxy-2'-deoxyguanosine-positive cell numbers and tumour necrosis factor-α, BAX, transforming growth factor-β, interleukin-6 and soluble collagen levels in the lungs. Inflammatory and fibrotic changes developed diffusely within the perilymphatic stromal area, as observed in humans. H2 treatment decreased these effects in the lungs. Thus, this model is valuable for studying the effects of H2 treatment and chronic interstitial pneumonia pathophysiology in humans. H2 appears to protect against RA-ILD by alleviating oxidative stress.
Collapse
Affiliation(s)
- Yasuhiro Terasaki
- Department of Analytic Human Pathology, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
| | - Mika Terasaki
- Department of Analytic Human Pathology, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
| | - Satoshi Kanazawa
- Department of Molecular and Cellular Biology, Nagoya City University, Nagoya, Japan
| | - Nariaki Kokuho
- Department of Analytic Human Pathology, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
| | - Hirokazu Urushiyama
- Department of Analytic Human Pathology, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
| | - Yusuke Kajimoto
- Department of Analytic Human Pathology, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
| | - Shinobu Kunugi
- Department of Analytic Human Pathology, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
| | - Motoyo Maruyama
- Division of Laboratory Animal Science, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
| | - Toshio Akimoto
- Division of Laboratory Animal Science, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
| | - Yoko Miura
- Department of Molecular and Cellular Biology, Nagoya City University, Nagoya, Japan
| | - Tsutomu Igarashi
- Department of Ophthalmology, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
| | - Ikuroh Ohsawa
- Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - Akira Shimizu
- Department of Analytic Human Pathology, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan
| |
Collapse
|
14
|
Fukutani Y, Tamaki R, Inoue R, Koshizawa T, Sakashita S, Ikegami K, Ohsawa I, Matsunami H, Yohda M. The N-terminal region of RTP1S plays important roles in dimer formation and odorant receptor-trafficking. J Biol Chem 2019; 294:14661-14673. [PMID: 31395660 PMCID: PMC6779431 DOI: 10.1074/jbc.ra118.007110] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Revised: 07/30/2019] [Indexed: 12/31/2022] Open
Abstract
Receptor-transporting protein 1S (RTP1S) is an accessory protein that mediates the transport of mammalian odorant receptors (ORs) into the plasma membrane. Although most ORs fail to localize to the cell surface when expressed alone in nonolfactory cells, functional expression of ORs is achieved with the coexpression of RTP1S. However, the mechanism for RTP1S-mediated OR trafficking remains unclear. In this study, we attempted to reveal the mode of action and critical residues of RTP1S in OR trafficking. Experiments using N-terminal truncation and Ala substitution mutants of RTP1S demonstrated that four N-terminal amino acids have essential roles in OR trafficking. Additionally, using recombinant proteins and split luciferase assays in mammalian cells, we provided evidence for the dimer formation of RTP1S. Furthermore, we determined that the 2nd Cys residue is required for the efficient dimerization of RTP1S. Altogether, these findings provide insights into the mechanism for plasma membrane transport of ORs by RTP1S.
Collapse
Affiliation(s)
- Yosuke Fukutani
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan.,Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina 27710
| | - Ryohei Tamaki
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
| | - Ryosuke Inoue
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
| | - Tomoyo Koshizawa
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
| | - Shuto Sakashita
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
| | - Kentaro Ikegami
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
| | - Ikuroh Ohsawa
- Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo 173-0015, Japan
| | - Hiroaki Matsunami
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina 27710.,Department of Neurobiology, Duke Institute for Brain Sciences, Duke University Medical Center, Durham, North Carolina 27705.,Institute of Global Innovation Research, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
| | - Masafumi Yohda
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan .,Institute of Global Innovation Research, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
| |
Collapse
|
15
|
Nishimaki K, Asada T, Ohsawa I, Nakajima E, Ikejima C, Yokota T, Kamimura N, Ohta S. Effects of Molecular Hydrogen Assessed by an Animal Model and a Randomized Clinical Study on Mild Cognitive Impairment. Curr Alzheimer Res 2019; 15:482-492. [PMID: 29110615 PMCID: PMC5872374 DOI: 10.2174/1567205014666171106145017] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Accepted: 11/01/2017] [Indexed: 11/22/2022]
Abstract
BACKGROUND Oxidative stress is one of the causative factors in the pathogenesis of neurodegenerative diseases including mild cognitive impairment (MCI) and dementia. We previously reported that molecular hydrogen (H2) acts as a therapeutic and preventive antioxidant. OBJECTIVE We assess the effects of drinking H2-water (water infused with H2) on oxidative stress model mice and subjects with MCI. METHODS Transgenic mice expressing a dominant-negative form of aldehyde dehydrogenase 2 were used as a dementia model. The mice with enhanced oxidative stress were allowed to drink H2-water. For a randomized double-blind placebo-controlled clinical study, 73 subjects with MCI drank ~300 mL of H2-water (H2-group) or placebo water (control group) per day, and the Alzheimer's Disease Assessment Scale-cognitive subscale (ADAS-cog) scores were determined after 1 year. RESULTS In mice, drinking H2-water decreased oxidative stress markers and suppressed the decline of memory impairment and neurodegeneration. Moreover, the mean lifespan in the H2-water group was longer than that of the control group. In MCI subjects, although there was no significant difference between the H2- and control groups in ADAS-cog score after 1 year, carriers of the apolipoprotein E4 (APOE4) genotype in the H2-group were improved significantly on total ADAS-cog score and word recall task score (one of the sub-scores in the ADAS-cog score). CONCLUSION H2-water may have a potential for suppressing dementia in an oxidative stress model and in the APOE4 carriers with MCI.
Collapse
Affiliation(s)
- Kiyomi Nishimaki
- Department of Biochemistry and Cell Biology, Graduate School of Medicine, Nippon Medical School, 1-396, Kosugimachi, Nakahara-ku, Kawasaki, Kanagawa 211-8533, Japan
| | - Takashi Asada
- Department of Neuropsychiatry, Institute of Clinical Medicine, University of Tsukuba, 1-1-1, Ten-noudai, Tsukuba, Ibaraki, 305-8577, Japan.,Ochanomizu Memory Clinic, The Medical Reunion of Tokyo Medical and Dental University, 1-5-34 Yushima, Bunkyou-ku, Tokyo 113-0034, Japan
| | - Ikuroh Ohsawa
- Department of Biochemistry and Cell Biology, Graduate School of Medicine, Nippon Medical School, 1-396, Kosugimachi, Nakahara-ku, Kawasaki, Kanagawa 211-8533, Japan.,Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi-ku, Tokyo 173- 0015, Japan
| | - Etsuko Nakajima
- Department of Neuropsychiatry, Institute of Clinical Medicine, University of Tsukuba, 1-1-1, Ten-noudai, Tsukuba, Ibaraki, 305-8577, Japan
| | - Chiaki Ikejima
- Department of Neuropsychiatry, Institute of Clinical Medicine, University of Tsukuba, 1-1-1, Ten-noudai, Tsukuba, Ibaraki, 305-8577, Japan
| | - Takashi Yokota
- Department of Biochemistry and Cell Biology, Graduate School of Medicine, Nippon Medical School, 1-396, Kosugimachi, Nakahara-ku, Kawasaki, Kanagawa 211-8533, Japan
| | - Naomi Kamimura
- Department of Biochemistry and Cell Biology, Graduate School of Medicine, Nippon Medical School, 1-396, Kosugimachi, Nakahara-ku, Kawasaki, Kanagawa 211-8533, Japan
| | - Shigeo Ohta
- Department of Biochemistry and Cell Biology, Graduate School of Medicine, Nippon Medical School, 1-396, Kosugimachi, Nakahara-ku, Kawasaki, Kanagawa 211-8533, Japan.,Department of Neurology, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo, Japan
| |
Collapse
|
16
|
Takahashi K, Ohsawa I, Shirasawa T, Takahashi M. Optic atrophy 1 mediates coenzyme Q-responsive regulation of respiratory complex IV activity in brain mitochondria. Exp Gerontol 2017; 98:217-223. [PMID: 28890359 DOI: 10.1016/j.exger.2017.09.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 08/24/2017] [Accepted: 09/05/2017] [Indexed: 11/15/2022]
Abstract
The oxygen consumption rate (OCR) in brain mitochondria is significantly lower in aged mice than in young mice, and the reduced OCR is rescued by administration of water-solubilized CoQ10 to aged mice via drinking water. However, the mechanism behind this remains unclear. Here, we show that the activity of respiratory complex IV (CIV) in brain mitochondria declined in aged mice than in young mice, with no significant change in individual respiratory complex levels and their supercomplex assembly. Reduced CIV activity in the aged mice coincided with reduced binding of optic atrophy 1 (OPA1) to CIV. Both reduced activity and OPA1 binding of CIV were rescued by water-solubilized CoQ10 administration to aged mice via drinking water. OCR and the activity and OPA1 binding of CIV in isolated brain mitochondria from aged mice were restored by incubation with CoQ10, but not in the presence of 15-deoxy-prostaglandin J2, an inhibitor of a GTPase effector domain-containing GTPase such as OPA1 and DRP1. By contrast, the CoQ10-responsive restoration of OCR in the isolated mitochondria was not inhibited by Mdivi-1, a selective inhibitor of DRP1. Thus, we propose a novel function of OPA1 in regulating the CIV activity in brain mitochondria in response to CoQ10.
Collapse
Affiliation(s)
- Kazuhide Takahashi
- Department of Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo 173-0015, Japan
| | - Ikuroh Ohsawa
- Department of Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo 173-0015, Japan
| | | | - Mayumi Takahashi
- Department of Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo 173-0015, Japan.
| |
Collapse
|
17
|
Murakami Y, Ito M, Ohsawa I. Molecular hydrogen protects against oxidative stress-induced SH-SY5Y neuroblastoma cell death through the process of mitohormesis. PLoS One 2017; 12:e0176992. [PMID: 28467497 PMCID: PMC5415102 DOI: 10.1371/journal.pone.0176992] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Accepted: 04/20/2017] [Indexed: 12/13/2022] Open
Abstract
Inhalation of molecular hydrogen (H2) gas ameliorates oxidative stress-induced acute injuries in the brain. Consumption of water nearly saturated with H2 also prevents chronic neurodegenerative diseases including Parkinson's disease in animal and clinical studies. However, the molecular mechanisms underlying the remarkable effect of a small amount of H2 remain unclear. Here, we investigated the effect of H2 on mitochondria in cultured human neuroblastoma SH-SY5Y cells. H2 increased the mitochondrial membrane potential and the cellular ATP level, which were accompanied by a decrease in the reduced glutathione level and an increase in the superoxide level. Pretreatment with H2 suppressed H2O2-induced cell death, whereas post-treatment did not. Increases in the expression of anti-oxidative enzymes underlying the Nrf2 pathway in H2-treated cells indicated that mild stress caused by H2 induced increased resistance to exacerbated oxidative stress. We propose that H2 functions both as a radical scavenger and a mitohormetic effector against oxidative stress in cells.
Collapse
Affiliation(s)
- Yayoi Murakami
- Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - Masafumi Ito
- Research Team for Mechanism of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - Ikuroh Ohsawa
- Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| |
Collapse
|
18
|
Abstract
Oxidative stress and neuroinflammation cause many neurological disorders. Recently, it has been reported that molecular hydrogen (H2) functions as an antioxidant and anti-inflammatory agent. The routes of H2 administration in animal model and human clinical studies are roughly classified into three types, inhalation of H2 gas, drinking H2-dissolved water, and injection of H2-dissolved saline. This review discusses some of the remarkable progress that has been made in the research of H2 use for neurological disorders, such as cerebrovascular diseases, neurodegenerative disorders, and neonatal brain disorders. Although most neurological disorders are currently incurable, these studies suggest the clinical potential of H2 administration for their prevention, treatment, and mitigation. Several of the potential effectors of H2 will also be discussed, including cell signaling molecules and hormones that are responsible for preventing oxidative stress and inflammation. Nevertheless, further investigation will be required to determine the direct target molecule of H2.
Collapse
Affiliation(s)
| | - Ikuroh Ohsawa
- Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi-ku, Tokyo 173-0015, Japan
| |
Collapse
|
19
|
Takahashi K, Ohsawa I, Shirasawa T, Takahashi M. Early-onset motor impairment and increased accumulation of phosphorylated α-synuclein in the motor cortex of normal aging mice are ameliorated by coenzyme Q. Exp Gerontol 2016; 81:65-75. [DOI: 10.1016/j.exger.2016.04.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 04/15/2016] [Accepted: 04/29/2016] [Indexed: 10/21/2022]
|
20
|
Shimada S, Wakayama K, Fukai M, Shimamura T, Ishikawa T, Fukumori D, Shibata M, Yamashita K, Kimura T, Todo S, Ohsawa I, Taketomi A. Hydrogen Gas Ameliorates Hepatic Reperfusion Injury After Prolonged Cold Preservation in Isolated Perfused Rat Liver. Artif Organs 2016; 40:1128-1136. [PMID: 27140066 DOI: 10.1111/aor.12710] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Revised: 12/30/2015] [Accepted: 01/07/2016] [Indexed: 12/12/2022]
Abstract
Hydrogen gas reduces ischemia and reperfusion injury (IRI) in the liver and other organs. However, the precise mechanism remains elusive. We investigated whether hydrogen gas ameliorated hepatic I/R injury after cold preservation. Rat liver was subjected to 48-h cold storage in University of Wisconsin solution. The graft was reperfused with oxygenated buffer with or without hydrogen at 37° for 90 min on an isolated perfusion apparatus, comprising the H2 (+) and H2 (-) groups, respectively. In the control group (CT), grafts were reperfused immediately without preservation. Graft function, injury, and circulatory status were assessed throughout the perfusion. Tissue samples at the end of perfusion were collected to determine histopathology, oxidative stress, and apoptosis. In the H2 (-) group, IRI was indicated by a higher aspartate aminotransferase (AST), alanine aminotransferase (ALT) leakage, portal resistance, 8-hydroxy-2-deoxyguanosine-positive cell rate, apoptotic index, and endothelial endothelin-1 expression, together with reduced bile production, oxygen consumption, and GSH/GSSG ratio (vs. CT). In the H2 (+) group, these harmful changes were significantly suppressed [vs. H2 (-)]. Hydrogen gas reduced hepatic reperfusion injury after prolonged cold preservation via the maintenance of portal flow, by protecting mitochondrial function during the early phase of reperfusion, and via the suppression of oxidative stress and inflammatory cascades thereafter.
Collapse
Affiliation(s)
| | | | - Moto Fukai
- Transplant Surgery, Hokkaido University Graduate School of Medicine
| | - Tsuyoshi Shimamura
- Central Clinical Facilities, Division of Organ Transplantation, Hokkaido University Hospital, Sapporo, Hokkaido, Japan
| | | | - Daisuke Fukumori
- Department of Surgical Gastroenterology and Transplantation, University of Copenhagen, Copenhagen, Denmark
| | - Maki Shibata
- Department of Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Itabashi, Tokyo
| | | | - Taichi Kimura
- Laboratory of Cancer Research, Department of Pathology, Hokkaido University Graduate School of Medicine, Sapporo, Hokkaido
| | - Satoru Todo
- St. Maria Hospital Laboratory, Kurume, Fukuoka, Japan
| | - Ikuroh Ohsawa
- Department of Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Itabashi, Tokyo
| | | |
Collapse
|
21
|
Ishigaki M, Iketani M, Sugaya M, Takahashi M, Tanaka M, Hattori S, Ohsawa I. STED super-resolution imaging of mitochondria labeled with TMRM in living cells. Mitochondrion 2016; 28:79-87. [DOI: 10.1016/j.mito.2016.03.009] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2015] [Revised: 03/26/2016] [Accepted: 03/29/2016] [Indexed: 12/31/2022]
|
22
|
Abstract
Background Sperm motility is a critical factor in male fertility. Low motility can be caused by a variety factors including abnormal spermatogenesis, oxidative damage, or depletion of intracellular ATP. Recent findings indicate that hydrogen molecule (H2) selectively reduces toxic reactive oxygen species. In this study, we investigated the effects of H2 on human sperm motility in vitro. Methods Experimentally damaged sperm suspensions from patients left at room temperature for > 5 days or frozen immediately after ejaculation were used. After exposure with H2, their forward motility was measured with a counting chamber. A time-lapse movie was recorded to analyze sperm swimming speed. Mitochondria were stained with a membrane potential-sensitive dye. Results H2 treatment significantly improved the rate of forward motility, whereas treatment with nitrogen gas did not. While treatment for 30 min was sufficient to improve motility, it did not affect sperm swimming speed. After 24 h, retreatment with H2 increased the motility again. H2 treatment also increased mitochondrial membrane potential. Forward motility of low motile frozen-thawed sperm from patients significantly improved with cleavage medium containing H2. Conclusions Our results illustrated that H2 treatment stimulates low sperm motility. H2 is a new promising tool for male infertility treatments.
Collapse
Affiliation(s)
- Kumiko Nakata
- Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi-ku, Tokyo, 173-0015 Japan ; Reproductive Medicine Research Center, Yamashita Shonan Yume Clinic, 1-2-10 Kugenumaishigami, Fujisawa, 251-0025 Japan
| | - Naoki Yamashita
- Reproductive Medicine Research Center, Yamashita Shonan Yume Clinic, 1-2-10 Kugenumaishigami, Fujisawa, 251-0025 Japan
| | - Yoshihiro Noda
- Animal Facility, Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi-ku, Tokyo, 173-0015 Japan
| | - Ikuroh Ohsawa
- Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi-ku, Tokyo, 173-0015 Japan
| |
Collapse
|
23
|
Nakashima Y, Ohsawa I, Nishimaki K, Kumamoto S, Maruyama I, Suzuki Y, Ohta S. Preventive effects of Chlorella on skeletal muscle atrophy in muscle-specific mitochondrial aldehyde dehydrogenase 2 activity-deficient mice. BMC Complement Altern Med 2014; 14:390. [PMID: 25305781 PMCID: PMC4200191 DOI: 10.1186/1472-6882-14-390] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Accepted: 10/07/2014] [Indexed: 12/24/2022]
Abstract
Background Oxidative stress is involved in age-related muscle atrophy, such as sarcopenia. Since Chlorella, a unicellular green alga, contains various antioxidant substances, we used a mouse model of enhanced oxidative stress to investigate whether Chlorella could prevent muscle atrophy. Methods Aldehyde dehydrogenase 2 (ALDH2) is an anti-oxidative enzyme that detoxifies reactive aldehydes derived from lipid peroxides such as 4-hydroxy-2-nonenal (4-HNE). We therefore used transgenic mice expressing a dominant-negative form of ALDH2 (ALDH2*2 Tg mice) to selectively decrease ALDH2 activity in the muscles. To evaluate the effect of Chlorella, the mice were fed a Chlorella-supplemented diet (CSD) for 6 months. Results ALDH2*2 Tg mice exhibited small body size, muscle atrophy, decreased fat content, osteopenia, and kyphosis, accompanied by increased muscular 4-HNE levels. The CSD helped in recovery of body weight, enhanced oxidative stress, and increased levels of a muscle impairment marker, creatine phosphokinase (CPK) induced by ALDH2*2. Furthermore, histological and histochemical analyses revealed that the consumption of the CSD improved skeletal muscle atrophy and the activity of the mitochondrial cytochrome c oxidase. Conclusions This study suggests that long-term consumption of Chlorella has the potential to prevent age-related muscle atrophy.
Collapse
|
24
|
Arakawa S, Watanabe T, Sone H, Tamura Y, Kobayashi M, Kawamori R, Atsumi Y, Oshida Y, Tanaka S, Suzuki S, Makita S, Ohsawa I, Sato Y. The factors that affect exercise therapy for patients with type 2 diabetes in Japan: a nationwide survey. Diabetol Int 2014. [DOI: 10.1007/s13340-014-0166-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
25
|
Muto J, Lee H, Lee H, Uwaya A, Park J, Nakajima S, Nagata K, Ohno M, Ohsawa I, Mikami T. Oral administration of inosine produces antidepressant-like effects in mice. Sci Rep 2014; 4:4199. [PMID: 24569499 PMCID: PMC3935199 DOI: 10.1038/srep04199] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Accepted: 02/06/2014] [Indexed: 12/22/2022] Open
Abstract
Inosine, a breakdown product of adenosine, has recently been shown to exert immunomodulatory and neuroprotective effects. We show here that the oral administration of inosine has antidepressant-like effects in two animal models. Inosine significantly enhanced neurite outgrowth and viability of primary cultured neocortical neurons, which was suppressed by adenosine A1 and A2A receptor agonists. Oral administration of inosine to mice transiently increased its concentration in the brain and enhanced neuronal proliferation in the dentate gyrus, accompanied by phosphorylation of mitogen-activated protein kinase and increase in transcript level of brain-derived neurotrophic factor. In stress models, oral inosine prevented an increase in immobility time in forced swim test after chronically unexpected stress and mitigated a reduction in sucrose preference after chronic social defeat stress. These results indicate that oral administration of inosine has the potential to prevent depressive disorder via adenosine receptors.
Collapse
Affiliation(s)
- Junko Muto
- 1] Graduate School of Health and Sport Science, Nippon Sport Science University, Tokyo, Japan [2] Department of Health and Sports Science, Nippon Medical School, Kawasaki, Japan
| | - Hosung Lee
- 1] Department of Health and Sports Science, Nippon Medical School, Kawasaki, Japan [2] Department of Biochemistry and Cell Biology, Institute of Development and Aging Science, Graduate School of Medicine, Nippon Medical School, Kawasaki, Japan
| | - Hyunjin Lee
- 1] Department of Health and Sports Science, Nippon Medical School, Kawasaki, Japan [2] Department of Biochemistry and Cell Biology, Institute of Development and Aging Science, Graduate School of Medicine, Nippon Medical School, Kawasaki, Japan
| | - Akemi Uwaya
- 1] Department of Health and Sports Science, Nippon Medical School, Kawasaki, Japan [2] Department of Biochemistry and Cell Biology, Institute of Development and Aging Science, Graduate School of Medicine, Nippon Medical School, Kawasaki, Japan
| | - Jonghyuk Park
- 1] Graduate School of Health and Sport Science, Nippon Sport Science University, Tokyo, Japan [2] Department of Health and Sports Science, Nippon Medical School, Kawasaki, Japan
| | - Sanae Nakajima
- 1] Department of Health and Sports Science, Nippon Medical School, Kawasaki, Japan [2] Department of Biochemistry and Cell Biology, Institute of Development and Aging Science, Graduate School of Medicine, Nippon Medical School, Kawasaki, Japan [3] Kyoritsu Women's Junior College, Tokyo, Japan
| | - Kazufumi Nagata
- 1] Department of Health and Sports Science, Nippon Medical School, Kawasaki, Japan [2] Department of Biochemistry and Cell Biology, Institute of Development and Aging Science, Graduate School of Medicine, Nippon Medical School, Kawasaki, Japan
| | - Makoto Ohno
- Graduate School of Health and Sport Science, Nippon Sport Science University, Tokyo, Japan
| | - Ikuroh Ohsawa
- Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - Toshio Mikami
- Department of Health and Sports Science, Nippon Medical School, Kawasaki, Japan
| |
Collapse
|
26
|
Mitsuishi T, Ohsawa I, Kato T, Egawa N, Kiyono T. Molecular cloning and characterisation of a novel type of human papillomavirus 160 isolated from a flat wart of an immunocompetent patient. PLoS One 2013; 8:e79592. [PMID: 24282509 PMCID: PMC3835941 DOI: 10.1371/journal.pone.0079592] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2013] [Accepted: 10/03/2013] [Indexed: 11/25/2022] Open
Abstract
More than 150 types of Human papillomaviruses (HPVs) have been isolated from numerous cutaneous and/or mucosal lesions. Flat wart samples on the face from 36 immunocompetent patients were collected and screened for HPV. From one sample, we cloned a putative novel genotype. The novel type consisted of 7779 bp in length with a GC content of 47.1%, containing open reading frames for putative early proteins (E1, E2, E4, E6, and E7) and two late proteins (L1 and L2). Homology searches and phylogenetic analyses indicated that it belonged to Alphapapillomavirus (Alpha-PV) species 2 and most closely resembled HPV 3. The virus fulfilled the definition of a novel type, and was named HPV 160 by the Reference Center for Papillomaviruses. The putative E7 protein of HPV 160 as well as HPV 29, 77, and 78 contained the Leu-X-Cys-X-Glu pRB-binding motif but other Alpha-PV species 2 (HPV 3, 10, 28, 94, 117, and 125) did not have this conserved motif.
Collapse
Affiliation(s)
- Tsuyoshi Mitsuishi
- Department of Dermatology, Tokyo Women’s Medical University Yachiyo Medical Center, Ohwada Shinden, Yachiyo City, Chiba, Japan
- * E-mail: (TK); (TM)
| | - Ikuroh Ohsawa
- Department of Biological Process of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - Toshihiko Kato
- Research Institute of Vaccine Therapy for Tumours and Infectious Diseases, Nippon Medical school, Tokyo, Japan
| | - Nagayasu Egawa
- Division of Virology, National Cancer Center Research Institute, Tokyo, Japan
| | - Tohru Kiyono
- Division of Virology, National Cancer Center Research Institute, Tokyo, Japan
- * E-mail: (TK); (TM)
| |
Collapse
|
27
|
Wu J, Duan S, Li W, Wang Y, Liu W, Zhang J, Lun L, Li X, Zhou C, Zheng Y, Liu S, Xie Y, Cai G, Chen X, Shen P, Li Y, Wang Z, Wang W, Ren H, Zhang W, Chen N, Shimamoto M, Ohsawa I, Suzuki H, Nagamachi S, Shimizu Y, Horikoshi S, Tomino Y, Cox SN, Serino G, Sallustio F, Pesce F, Schena FP, Kalbacher E, Ducher M, Fouque D, MacGregor B, Combarnous F, Fauvel JP, Sarcina C, Ferrario F, Terraneo V, Pani A, Fogazzi G, Visciano GB, De Simone I, Rastelli F, Pozzi C, Kwak IS, Seong EY, Rhee H, Lee DW, Lee SB, Yang BY, Shin MJ, Kim IY, Stangou MJ, Bantis C, Kasimatis S, Skoularopoulou M, Toulkeridis G, Pantzaki A, Papagianni A, Efstratiadis G, Yamada K, Suzuki H, Suzuki Y, Raska M, Huang ZQ, Reily C, Moldoveanu Z, Kiryluk K, Julian BA, Tomino Y, Gharavi AG, Novak J, Camilla R, Coppo R, Bellur S, Cattran D, Cook T, Feehally J, Troyanov S, Roberts I, Vergano L, Morando L, Mizerska-Wasiak M, Maldyk J, Rybi-Szuminska A, Firszt-Adamczyk A, Bienias B, Gadomska-Prokop K, Grenda R, Zajaczkowska M, Stankiewicz R, Wasilewska A, Roszkowska-Blaim M, Zhang X, Xie J, Wang W, Pan X, Guo S, Shen P, Zhang W, Chen N, Soylu A, Ozturk Y, Dogan Y, Ozmen D, Yilmaz O, Kavukcu S, Choi JY, Park GY, Jung HY, Kim KH, Kwon O, Cho JH, Kim CD, Kim YL, Park SH, Berthoux FC, Mohey H, Laurent B, Mariat C, Chen YX, Zhang W, Xu J, Chen N, Bajcsi D, Haris A, Abraham G, Legrady P, Polner K, Ronaszeki B, Balla Z, Rakonczay Z, Ivanyi B, Sonkodi S, Bredin PH, Canney M, Kennedy C, Plant LD, Clarkson MR, Naz N, Hiremath M, Banerjee A, Shah Y, Yuste C, Casian A, Jironda C, Jayne D, Smith R, Lewin M, Jones R, Merkel P, Jayne D, Izzo C, Quaglia M, Radin E, Airoldi A, Fenoglio R, Lazzarich E, Stratta P, Onusic VL, Araujo MJ, Battaini LC, Jorge LB, Dias CB, Toledo-Barros M, Toledo-Barros R, Woronik V, Cirami CL, Gallo P, Romoli E, Mecacci F, Simeone S, Minetti EE, Mello G, Rivera F, Segarra A, Praga M, Quaglia M, Radin E, Izzo C, Airoldi A, Lazzarich E, Fenoglio R, Stratta P, Dias CB, Lee J, Jorge L, Malheiro D, Barros RT, Woronik V, Zakharova EV, Stolyarevich ES, Velioglu A, Guler D, Nalcaci S, Birdal G, Arikan H, Koc M, Direskeneli H, Tuglular S, Ozener C, Guedes Marques M, Cotovio P, Ferrer F, Silva C, Botelho C, Lopes K, Maia P, Carreira A, Campos M, Alharazy S, Kong NCT, Mohammad M, Shah SA, Gafor H, Bain A. Clinical nephrology - IgA nephropathy, lupus nephritis, vasculitis. Nephrol Dial Transplant 2013. [DOI: 10.1093/ndt/gft113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
28
|
Iio A, Ito M, Itoh T, Terazawa R, Fujita Y, Nozawa Y, Ohsawa I, Ohno K, Ito M. Molecular hydrogen attenuates fatty acid uptake and lipid accumulation through downregulating CD36 expression in HepG2 cells. Med Gas Res 2013; 3:6. [PMID: 23448206 PMCID: PMC3599869 DOI: 10.1186/2045-9912-3-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2012] [Accepted: 02/25/2013] [Indexed: 02/08/2023] Open
Abstract
Background There is accumulating evidence that obesity is closely associated with an impaired free fatty acid metabolism as well as with insulin resistance and inflammation. Excessive fatty acid uptake mediated by fatty acid translocase CD36 plays an important role in hepatic steatosis. Molecular hydrogen has been shown to attenuate oxidative stress and improve lipid, glucose and energy metabolism in patients and animal models of hepatic steatosis and atherosclerosis, but the underlying molecular mechanisms remain largely unknown. Methods Human hepatoma HepG2 cells were exposed to palmitate-BSA complex after treatment with or without hydrogen for 24 h. The fatty acid uptake was measured by using spectrofluorometry and the lipid content was detected by Oil Red O staining. JNK phosphorylation and CD36 expression were analyzed by Western blot and real-time PCR analyses. Results Pretreatment with hydrogen reduced fatty acid uptake and lipid accumulation after palmitate overload in HepG2 cells, which was associated with inhibition of JNK activation. Hydrogen treatment did not alter CD36 mRNA expression but reduced CD36 protein expression. Conclusion Hydrogen inhibits fatty acid uptake and lipid accumulation through the downregulation of CD36 at the protein level in hepatic cultured cells, providing insights into the molecular mechanism underlying the hydrogen effects in vivo on lipid metabolism disorders.
Collapse
Affiliation(s)
- Akio Iio
- Research Team for Mechanism of Aging, Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi, Tokyo, 173-0015, Japan.
| | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Higashi M, Ohsawa I, Oda F, Yamada Y, Kawana S, Iida K, Mitsuishi T. Histamine H1-receptor antagonistic drug olopatadine suppresses TSLP in atopic dermatitis model mice. Allergol Int 2013; 62:137-8. [PMID: 23172358 DOI: 10.2332/allergolint.12-le-0466] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
30
|
Pech T, von Websky M, Ohsawa I, Kitamura K, Praktiknjo M, Jafari A, Vilz TO, Wehner S, Abu-Elmagd K, Kalff JC, Schaefer N. Intestinal regeneration, residual function and immunological priming following rescue therapy after rat small bowel transplantation. Am J Transplant 2012; 12 Suppl 4:S9-17. [PMID: 22974463 DOI: 10.1111/j.1600-6143.2012.04262.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Clinical evidence suggests that recurrent acute cellular rejection (ACR) may trigger chronic rejection and impair outcome after intestinal transplantation. To test this hypothesis and clarify underlying molecular mechanisms, orthotopic/allogenic intestinal transplantation was performed in rats. ACR was allowed to occur in a MHC-disparate combination (BN-LEW) and two rescue strategies (FK506monotherapy vs. FK506+infliximab) were tested against continuous immunosuppression without ACR, with observation for 7/14 and 21 days after transplantation. Both, FK506 and FK506+infliximab rescue therapy reversed ACR and resulted in improved histology and less cellular infiltration. Proinflammatory cytokines and chemotactic mediators in the muscle layer were significantly reduced in FK506 treated groups. Increased levels of CD4, FOXP3 and IL-17 (mRNA) were observed with infliximab. Contractile function improved significantly after FK506 rescue therapy, with a slight benefit from additional infliximab, but did not reach nontransplanted controls. Fibrosis onset was detected in both rescue groups by Sirius-Red staining with concomitant increase of the fibrogenic mediator VEGF. Recovery from ACR could be attained by both rescue therapy regimens, progressing steadily after initiation of immunosuppression. Reversal of ACR, however, resulted in early stage graft fibrosis. Additional infliximab treatment may enhance physiological recovery of the muscle layer and enteric nervous system independent of inflammatory reactions.
Collapse
Affiliation(s)
- T Pech
- Department of Surgery, Rheinische Friedrich-Wilhelms-Universität Bonn, Germany
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Ohsawa I, Usui M, Mizuno S, Murata Y, Kuriyama N, Kishiwada M, Hamada T, Sakurai H, Tabata M, Isaji S. Rescue Therapy with Infliximab for Steroid Resistant Refractory Acute Rejection in Liver Transplant Patients: A Report of Two Cases. Transplantation 2012. [DOI: 10.1097/00007890-201211271-01470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
32
|
Hoshi H, Hao W, Fujita Y, Funayama A, Miyauchi Y, Hashimoto K, Miyamoto K, Iwasaki R, Sato Y, Kobayashi T, Miyamoto H, Yoshida S, Mori T, Kanagawa H, Katsuyama E, Fujie A, Kitagawa K, Nakayama KI, Kawamoto T, Sano M, Fukuda K, Ohsawa I, Ohta S, Morioka H, Matsumoto M, Chiba K, Toyama Y, Miyamoto T. Aldehyde-stress resulting from Aldh2 mutation promotes osteoporosis due to impaired osteoblastogenesis. J Bone Miner Res 2012; 27:2015-23. [PMID: 22508505 DOI: 10.1002/jbmr.1634] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Osteoporosis is a complex disease with various causes, such as estrogen loss, genetics, and aging. Here we show that a dominant-negative form of aldehyde dehydrogenase 2 (ALDH2) protein, ALDH2*2, which is produced by a single nucleotide polymorphism (rs671), promotes osteoporosis due to impaired osteoblastogenesis. Aldh2 plays a role in alcohol-detoxification by acetaldehyde-detoxification; however, transgenic mice expressing Aldh2*2 (Aldh2*2 Tg) exhibited severe osteoporosis with increased levels of blood acetaldehyde without alcohol consumption, indicating that Aldh2 regulates physiological bone homeostasis. Wild-type osteoblast differentiation was severely inhibited by exogenous acetaldehyde, and osteoblastic markers such as osteocalcin, runx2, and osterix expression, or phosphorylation of Smad1,5,8 induced by bone morphogenetic protein 2 (BMP2) was strongly altered by acetaldehyde. Acetaldehyde treatment also inhibits proliferation and induces apoptosis in osteoblasts. The Aldh2*2 transgene or acetaldehyde treatment induced accumulation of the lipid-oxidant 4-hydroxy-2-nonenal (4HNE) and expression of peroxisome proliferator-activated receptor gamma (PPARγ), a transcription factor that promotes adipogenesis and inhibits osteoblastogenesis. Antioxidant treatment inhibited acetaldehyde-induced proliferation-loss, apoptosis, and PPARγ expression and restored osteoblastogenesis inhibited by acetaldehyde. Treatment with a PPARγ inhibitor also restored acetaldehyde-mediated osteoblastogenesis inhibition. These results provide new insight into regulation of osteoporosis in a subset of individuals with ALDH2*2 and in alcoholic patients and suggest a novel strategy to promote bone formation in such osteopenic diseases.
Collapse
Affiliation(s)
- Hiroko Hoshi
- Department of Orthopedic Surgery, Keio University School of Medicine, 35 Shinano-machi, Shinjuku-ku, Tokyo, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Mizuno S, Murata Y, Kuriyama N, Ohsawa I, Kishiwada M, Hamada T, Usui M, Sakurai H, Tabata M, Isaji S. Living donor liver transplantation for the patients with portal vein thrombosis: use of an interpositional venous graft passed posteriorly to the pancreatic parenchyma without using jump graft. Transplant Proc 2012; 44:356-9. [PMID: 22410015 DOI: 10.1016/j.transproceed.2012.01.039] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
BACKGROUND It is difficult to reconstruct the portal vein (PV) using a long interpositional venous graft in living donor liver transplant (LDLT) patients with portal vein thrombosis (PVT), which involves the confluence of the superior mesenteric vein (SMV) and splenic vein (SV). We successfully performed LDLT for three patients with PVT using an interpositional vascular conduit passing posterior to the pancreas without a jump graft. METHODS Three of 130 patients who underwent LDLT in our hospital between March 2002 and June 2011 required this technique. After indentifying the location of the SMV, SV and gastrocolic trunk, we ligated and cut the posterior superior pancreaticoduodenal vein and other short branches from the PV. The PV was drawn inferiorly to the pancreas and transected at the confluence of SMV and SV. The external iliac vein or internal jugular vein was sacrificed as a graft for anastomosis to the cut end of the SMV using 6-0 polypropylene running sutures. Then the venous graft was drawn superiorly to the pancreas by passing it posterior to the pancreas parenchyma for anastomosis to the liver graft PV. The interpositional vein was placed posterior to the pancreas where the PV used to be. RESULTS All three patients displayed favorable postoperative courses with the Doppler ultrasound demonstrating good portal flow perioperatively. The postoperative portogram demonstrated patency of the vascular graft. CONCLUSION This method is easy and helpful to treat portal vein thrombosis, by providing the shortest route between the PV of the donor and the SMV of the recipient.
Collapse
Affiliation(s)
- S Mizuno
- Department of Hepatobiliary Pancreatic and Transplant Surgery, Mie University School of Medicine, Tsu, Mie, Japan.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Kumamoto K, Mizuno S, Kuriyama N, Ohsawa I, Kishiwada M, Hamada T, Usui M, Sakurai H, Tabata M, Isaji S. Postoperative Liver Dysfunction in Living Donors After Left-Sided Graft Hepatectomy: Portal Venous Occlusion of the Medial Segment After Lateral Segmentectomy and Hepatic Venous Congestion After Left Lobe Hepatectomy. Transplant Proc 2012; 44:332-7. [DOI: 10.1016/j.transproceed.2012.01.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
35
|
Sato N, Ohsawa I, Nagamachi S, Ishii M, Kusaba G, Inoshita H, Toki A, Horikoshi S, Ohi H, Matsushita M, Tomino Y. Significance of glomerular activation of the alternative pathway and lectin pathway in lupus nephritis. Lupus 2011; 20:1378-86. [PMID: 21893562 DOI: 10.1177/0961203311415561] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The objective of the present study was to elucidate the association between glomerular complement depositions belonging to the alternative (AP) and lectin (LP) pathways, and clinical findings of lupus nephritis (LN). Immunofluorescence (IF) was performed on 17 LN patients using antibodies against factor B, factor H, properdin, mannose-binding lectin (MBL) and L-ficolin. Compared with factor B/factor H negative patients (n = 9), positive patients (n = 8) showed longer duration of LN (p < 0.05) and more severe interstitial fibrosis (p < 0.05). Eleven patients had properdin deposition in glomeruli, and in three of them, with a duration of LN of less than 1 month, factor B was undetectable. Compared with properdin negative patients (n = 6), positive patients (n = 11) showed significantly higher urinary protein excretion (p < 0.01). MBL/L-ficolin positive patients (n = 11) also had significantly higher urinary protein excretion (p < 0.05) compared with negative patients (n = 6). An independent association was found between glomerular deposition of properdin and that of MBL/L-ficolin (p < 0.01) in addition to factor B/factor H. Traces of glomerular activation of AP and LP reflected the clinical status of LN. It appears that glomerular deposition of each complement component, especially properdin, may be an index of the histological activity of LN.
Collapse
Affiliation(s)
- N Sato
- Division of Nephrology, Department of Internal Medicine, Juntendo University Faculty of Medicine, Japan
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
36
|
Pech T, Fujishiro J, Finger T, Ohsawa I, Praktiknjo M, von Websky M, Wehner S, Abu-Elmagd K, Kalff JC, Schaefer N. Perioperative infliximab application has marginal effects on ischemia-reperfusion injury in experimental small bowel transplantation in rats. Langenbecks Arch Surg 2011; 397:131-40. [PMID: 21960137 DOI: 10.1007/s00423-011-0853-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Accepted: 09/14/2011] [Indexed: 12/16/2022]
Abstract
PURPOSE Ischemia-reperfusion injury leads to impaired smooth muscle function and inflammatory reactions after intestinal transplantation. In previous studies, infliximab has been shown to effectively protect allogenic intestinal grafts in the early phase after transplantation with resulting improved contractility. This study was designed to reveal protective effects of infliximab on ischemia-reperfusion injury in isogenic transplantation. METHODS Isogenic, orthotopic small bowel transplantation was performed in Lewis rats (3 h cold ischemia). Five groups were defined: non-transplanted animals with no treatment (group 1), isogenic transplanted animals with vehicle treatment (groups 2/3) or with infliximab treatment (5 mg/kg body weight intravenously, directly after reperfusion; groups 4/5). The treated animals were sacrificed after 3 (group 2/4) or 24 h (group 3/5). Histological and immunohistochemical analysis, TUNEL staining, real-time RT-PCR, and contractility measurements in a standard organ bath were used for determination of ischemia-reperfusion injury. RESULTS All transplanted animals showed reduced smooth muscle function, while no significant advantage of infliximab treatment was observed. Reduced infiltration of neutrophils was noted in the early phase in animals treated with infliximab. The structural integrity of the bowel and infiltration of ED1-positive monocytes and macrophages did not improve with infliximab treatment. At 3 h after reperfusion, mRNA expression of interleukin (IL)-6, TNF-α, IL-10, and iNOS and MCP-1 displayed increased activation in the infliximab group. CONCLUSION The protective effects of infliximab in the early phase after experimental small bowel transplantation seem to be unrelated to ischemia-reperfusion injury. The promising effects in allogenic transplantation indicate the need for further experiments with infliximab as complementary treatment under standard immunosuppressive therapy. Further experiments should focus on additional infliximab treatment in the setting of acute rejection.
Collapse
Affiliation(s)
- T Pech
- Department of Surgery, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Germany
| | | | | | | | | | | | | | | | | | | |
Collapse
|
37
|
Mitsuishi T, Kabashima K, Tanizaki H, Ohsawa I, Oda F, Yamada Y, Halifu Y, Kawana S, Kato T, Iida K. Specific substance of Maruyama (SSM) suppresses immune responses in atopic dermatitis-like skin lesions in DS-Nh mice by modulating dendritic cell functions. J Dermatol Sci 2011; 63:184-90. [DOI: 10.1016/j.jdermsci.2011.05.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2011] [Revised: 05/23/2011] [Accepted: 05/27/2011] [Indexed: 11/16/2022]
|
38
|
Terasaki Y, Ohsawa I, Terasaki M, Takahashi M, Kunugi S, Dedong K, Urushiyama H, Amenomori S, Kaneko-Togashi M, Kuwahara N, Ishikawa A, Kamimura N, Ohta S, Fukuda Y. Hydrogen therapy attenuates irradiation-induced lung damage by reducing oxidative stress. Am J Physiol Lung Cell Mol Physiol 2011; 301:L415-26. [PMID: 21764987 DOI: 10.1152/ajplung.00008.2011] [Citation(s) in RCA: 110] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Molecular hydrogen (H(2)) is an efficient antioxidant that diffuses rapidly across cell membranes, reduces reactive oxygen species (ROS), such as hydroxyl radicals and peroxynitrite, and suppresses oxidative stress-induced injury in several organs. ROS have been implicated in radiation-induced damage to lungs. Because prompt elimination of irradiation-induced ROS should protect lung tissue from damaging effects of irradiation, we investigated the possibility that H(2) could serve as a radioprotector in the lung. Cells of the human lung epithelial cell line A549 received 10 Gy irradiation with or without H(2) treatment via H(2)-rich PBS or medium. We studied the possible radioprotective effects of H(2) by analyzing ROS and cell damage. Also, C57BL/6J female mice received 15 Gy irradiation to the thorax. Treatment groups inhaled 3% H(2) gas and drank H(2)-enriched water. We evaluated acute and late-irradiation lung damage after H(2) treatment. H(2) reduced the amount of irradiation-induced ROS in A549 cells, as shown by electron spin resonance and fluorescent indicator signals. H(2) also reduced cell damage, measured as levels of oxidative stress and apoptotic markers, and improved cell viability. Within 1 wk after whole thorax irradiation, immunohistochemistry and immunoblotting showed that H(2) treatment reduced oxidative stress and apoptosis, measures of acute damage, in the lungs of mice. At 5 mo after irradiation, chest computed tomography, Ashcroft scores, and type III collagen deposition demonstrated that H(2) treatment reduced lung fibrosis (late damage). This study thus demonstrated that H(2) treatment is valuable for protection against irradiation lung damage with no known toxicity.
Collapse
Affiliation(s)
- Yasuhiro Terasaki
- Department of Analytic Human Pathology, Nippon Medical School, Tokyo, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Kamimura N, Nishimaki K, Ohsawa I, Ohta S. Molecular hydrogen improves obesity and diabetes by inducing hepatic FGF21 and stimulating energy metabolism in db/db mice. Obesity (Silver Spring) 2011; 19:1396-403. [PMID: 21293445 DOI: 10.1038/oby.2011.6] [Citation(s) in RCA: 142] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Recent extensive studies have revealed that molecular hydrogen (H(2)) has great potential for improving oxidative stress-related diseases by inhaling H(2) gas, injecting saline with dissolved H(2), or drinking water with dissolved H(2) (H(2)-water); however, little is known about the dynamic movement of H(2) in a body. First, we show that hepatic glycogen accumulates H(2) after oral administration of H(2)-water, explaining why consumption of even a small amount of H(2) over a short span time efficiently improves various disease models. This finding was supported by an in vitro experiment in which glycogen solution maintained H(2). Next, we examined the benefit of ad libitum drinking H(2)-water to type 2 diabetes using db/db obesity model mice lacking the functional leptin receptor. Drinking H(2)-water reduced hepatic oxidative stress, and significantly alleviated fatty liver in db/db mice as well as high fat-diet-induced fatty liver in wild-type mice. Long-term drinking H(2)-water significantly controlled fat and body weights, despite no increase in consumption of diet and water. Moreover, drinking H(2)-water decreased levels of plasma glucose, insulin, and triglyceride, the effect of which on hyperglycemia was similar to diet restriction. To examine how drinking H(2)-water improves obesity and metabolic parameters at the molecular level, we examined gene-expression profiles, and found enhanced expression of a hepatic hormone, fibroblast growth factor 21 (FGF21), which functions to enhance fatty acid and glucose expenditure. Indeed, H(2) stimulated energy metabolism as measured by oxygen consumption. The present results suggest the potential benefit of H(2) in improving obesity, diabetes, and metabolic syndrome.
Collapse
Affiliation(s)
- Naomi Kamimura
- Department of Biochemistry and Cell Biology, Institute of Development and Aging Sciences, Graduate School of Medicine, Nippon Medical School, Kawasaki, Kanagawa, Japan
| | | | | | | |
Collapse
|
40
|
Pech T, Finger T, Fujishiro J, Praktiknjo M, Ohsawa I, Abu-Elmagd K, Limmer A, Hirner A, Kalff JC, Schaefer N. Perioperative infliximab application ameliorates acute rejection associated inflammation after intestinal transplantation. Am J Transplant 2010; 10:2431-41. [PMID: 20977634 DOI: 10.1111/j.1600-6143.2010.03279.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
As we have shown in the past, acute rejection-related TNF-α upregulation in resident macrophages in the tunica muscularis after small bowel transplantation (SBTx) results in local amplification of inflammation, decisively contributing to graft dysmotility. Therefore, the aim of this study is to investigate the effectiveness of the chimeric-monoclonal-anti-TNF-α antibody infliximab as perioperative single shot treatment addressing inflammatory processes during acute rejection early after transplantation. Orthotopic, isogenic and allogenic SBTx was performed in rats (BN-Lewis/BN-BN) with infliximab treatment. Vehicle and IV-immunoglobulin-treated animals served as controls. Animals were sacrificed after 24 and 168 h. Leukocyte infiltration was investigated in muscularis whole mounts by immunohistochemistry, mediator mRNA expression by Real-Time-RT-PCR, apoptosis by TUNEL and smooth muscle contractility in a standard organ bath. Both, infliximab and Sandoglobulin® revealed antiinflammatory effects. Infliximab resulted in significantly less leukocyte infiltration compared to allogenic controls and IV-immunoglobulin, which was accompanied by lower gene expression of MCP-1 (24 h), IFN-γ (168 h) and infiltration of CD8-positive cells. Smooth muscle contractility improved significantly after 24 h compared to all controls in infliximab treated animals accompanied by lower iNOS expression. Perioperative treatment with infliximab is a possible pharmaceutical approach to overcome graft dysmotility early after SBTx.
Collapse
Affiliation(s)
- T Pech
- Department of Surgery, Rheinische Friedrich-Wilhelms-Universität Bonn, Germany Division of Intestinal Transplantation, Thomas E. Starzl Transplantation Institute, University of Pittsburgh, PA, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Nakajima S, Ohsawa I, Ohta S, Ohno M, Mikami T. Regular voluntary exercise cures stress-induced impairment of cognitive function and cell proliferation accompanied by increases in cerebral IGF-1 and GST activity in mice. Behav Brain Res 2010; 211:178-84. [DOI: 10.1016/j.bbr.2010.03.028] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2010] [Accepted: 03/15/2010] [Indexed: 11/25/2022]
|
42
|
Wu IC, Ohsawa I, Fuku N, Tanaka M. Metabolic analysis of 13C-labeled pyruvate for noninvasive assessment of mitochondrial function. Ann N Y Acad Sci 2010; 1201:111-20. [DOI: 10.1111/j.1749-6632.2010.05636.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
43
|
Ohsawa I, Nishimaki K, Murakoshi H, Yokota T, Ohta S. P4‐131: Consumption of Hydrogen Water Prevents the Age‐dependent Impairment in Learning and Memory Tasks in AD Model Mice. Alzheimers Dement 2010. [DOI: 10.1016/j.jalz.2010.08.190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Ikuroh Ohsawa
- Tokyo Metropolitan Institute of GerontologyTokyo Japan
| | | | | | | | | |
Collapse
|
44
|
Mitsuishi T, Iwabu Y, Tokunaga K, Sata T, Kaneko T, Ohara K, Ohsawa I, Oda F, Yamada Y, Kawana S, Ozaki K, Nakatake M, Yamada O. Combined analysis of cell growth and apoptosis-regulating proteins in HPVs associated anogenital tumors. BMC Cancer 2010; 10:118. [PMID: 20346172 PMCID: PMC2868050 DOI: 10.1186/1471-2407-10-118] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2009] [Accepted: 03/27/2010] [Indexed: 11/25/2022] Open
Abstract
Background The clinical course of human papillomavirus (HPV) associated with Bowenoid papulosis and condyloma acuminatum of anogenital tumors are still unknown. Here we evaluated molecules that are relevant to cellular proliferation and regulation of apoptosis in HPV associated anogenital tumors. Methods We investigated the levels of telomerase activity, and inhibitor of apoptosis proteins (IAPs) family (c-IAP1, c-IAP2, XIAP) and c-Myc mRNA expression levels in 20 specimens of Bowenoid papulosis and 36 specimens of condyloma acuminatum in anogenital areas. Overall, phosphorylated (p-) AKT, p-ribosomal protein S6 (S6) and p-4E-binding protein 1 (4EBP1) expression levels were examined by immunohistochemistry in anogenital tumors both with and without positive telomerase activity. Results Positive telomerase activity was detected in 41.7% of Bowenoid papulosis and 27.3% of condyloma acuminatum compared to normal skin (p < 0.001). In contrast, the expression levels of Bowenoid papulosis indicated that c-IAP1, c-IAP2 and XIAP mRNA were significantly upregulated compared to those in both condyloma acuminatum samples (p < 0.001, p < 0.001, p = 0.022, respectively) and normal skin (p < 0.001, p = 0.002, p = 0.034, respectively). Overall, 30% of Bowenoid papulosis with high risk HPV strongly promoted IAPs family and c-Myc but condyloma acuminatum did not significantly activate those genes. Immunohistochemically, p-Akt and p-S6 expressions were associated with positive telomerase activity but not with p-4EBP1 expression. Conclusion Combined analysis of the IAPs family, c-Myc mRNA expression, telomerase activity levels and p-Akt/p-S6 expressions may provide clinically relevant molecular markers in HPV associated anogenital tumors.
Collapse
Affiliation(s)
- Tsuyoshi Mitsuishi
- Department of Dermatology, Nippon Medical School, 1-1-5 Sendagi, Bunkyou-ku, Tokyo, 113-8603, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Oharazawa H, Igarashi T, Yokota T, Fujii H, Suzuki H, Machide M, Takahashi H, Ohta S, Ohsawa I. Protection of the Retina by Rapid Diffusion of Hydrogen: Administration of Hydrogen-Loaded Eye Drops in Retinal Ischemia–Reperfusion Injury. ACTA ACUST UNITED AC 2010; 51:487-92. [DOI: 10.1167/iovs.09-4089] [Citation(s) in RCA: 123] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Hideaki Oharazawa
- From the Department of Ophthalmology, Musashikosugi Hospital, Nippon Medical School, Kanagawa, Japan
| | - Tsutomu Igarashi
- the Department of Ophthalmology, Nippon Medical School, Tokyo, Japan; and
| | | | - Hiroaki Fujii
- From the Department of Ophthalmology, Musashikosugi Hospital, Nippon Medical School, Kanagawa, Japan
| | - Hisaharu Suzuki
- the Department of Ophthalmology, Nippon Medical School, Tokyo, Japan; and
| | | | - Hiroshi Takahashi
- the Department of Ophthalmology, Nippon Medical School, Tokyo, Japan; and
| | - Shigeo Ohta
- the Department of Biochemistry and Cell Biology, Institute of Development and Aging Sciences, Nippon Medical School, Kanagawa, Japan
| | | |
Collapse
|
46
|
Ishii M, Inoshita H, Kusaba G, Hagiwara S, Suzuki H, Aizawa M, Ohsawa I, Ohi H, Eishi Y, Horikoshi S, Tomino Y. Evidence of latent pathogenesis of Propionibacterium acnes infection in a patient with renal sarcoidosis. Clin Kidney J 2009. [DOI: 10.1093/ndtplus/sfp183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
47
|
Endo J, Sano M, Katayama T, Hishiki T, Shinmura K, Morizane S, Matsuhashi T, Katsumata Y, Zhang Y, Ito H, Nagahata Y, Marchitti S, Nishimaki K, Wolf AM, Nakanishi H, Hattori F, Vasiliou V, Adachi T, Ohsawa I, Taguchi R, Hirabayashi Y, Ohta S, Suematsu M, Ogawa S, Fukuda K. Metabolic Remodeling Induced by Mitochondrial Aldehyde Stress Stimulates Tolerance to Oxidative Stress in the Heart. Circ Res 2009; 105:1118-27. [DOI: 10.1161/circresaha.109.206607] [Citation(s) in RCA: 115] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Rationale
:
Aldehyde accumulation is regarded as a pathognomonic feature of oxidative stress–associated cardiovascular disease.
Objective
:
We investigated how the heart compensates for the accelerated accumulation of aldehydes.
Methods and Results
:
Aldehyde dehydrogenase 2 (ALDH2) has a major role in aldehyde detoxification in the mitochondria, a major source of aldehydes. Transgenic (Tg) mice carrying an
Aldh2
gene with a single nucleotide polymorphism (
Aldh2*2
) were developed. This polymorphism has a dominant-negative effect and the Tg mice exhibited impaired ALDH activity against a broad range of aldehydes. Despite a shift toward the oxidative state in mitochondrial matrices,
Aldh2*2
Tg hearts displayed normal left ventricular function by echocardiography and, because of metabolic remodeling, an unexpected tolerance to oxidative stress induced by ischemia/reperfusion injury. Mitochondrial aldehyde stress stimulated eukaryotic translation initiation factor 2α phosphorylation. Subsequent translational and transcriptional activation of activating transcription factor-4 promoted the expression of enzymes involved in amino acid biosynthesis and transport, ultimately providing precursor amino acids for glutathione biosynthesis. Intracellular glutathione levels were increased 1.37-fold in
Aldh2*2
Tg hearts compared with wild-type controls. Heterozygous knockout of
Atf4
blunted the increase in intracellular glutathione levels in
Aldh2*2
Tg hearts, thereby attenuating the oxidative stress–resistant phenotype. Furthermore, glycolysis and NADPH generation via the pentose phosphate pathway were activated in
Aldh2*2
Tg hearts. (NADPH is required for the recycling of oxidized glutathione.)
Conclusions
:
The findings of the present study indicate that mitochondrial aldehyde stress in the heart induces metabolic remodeling, leading to activation of the glutathione–redox cycle, which confers resistance against acute oxidative stress induced by ischemia/reperfusion.
Collapse
Affiliation(s)
- Jin Endo
- From the Department of Regenerative Medicine and Advanced Cardiac Therapeutics (J.E., M. Sano, T.K., S. Morizane, T.M., Y.K., Y.Z., H.I., F.H., K.F.); Cardiology Division (J.E., T.K., T.M., Y.K., S. Ogawa), Department of Internal Medicine; Department of Biochemistry and Integrative Medical Biology (T.H., Y.N., T.A., M. Suematsu); and Division of Geriatric Medicine (K.S.), Keio University School of Medicine, Tokyo, Japan; Precursory Research for Embryonic Science and Technology (PRESTO) (M. Sano),
| | - Motoaki Sano
- From the Department of Regenerative Medicine and Advanced Cardiac Therapeutics (J.E., M. Sano, T.K., S. Morizane, T.M., Y.K., Y.Z., H.I., F.H., K.F.); Cardiology Division (J.E., T.K., T.M., Y.K., S. Ogawa), Department of Internal Medicine; Department of Biochemistry and Integrative Medical Biology (T.H., Y.N., T.A., M. Suematsu); and Division of Geriatric Medicine (K.S.), Keio University School of Medicine, Tokyo, Japan; Precursory Research for Embryonic Science and Technology (PRESTO) (M. Sano),
| | - Takaharu Katayama
- From the Department of Regenerative Medicine and Advanced Cardiac Therapeutics (J.E., M. Sano, T.K., S. Morizane, T.M., Y.K., Y.Z., H.I., F.H., K.F.); Cardiology Division (J.E., T.K., T.M., Y.K., S. Ogawa), Department of Internal Medicine; Department of Biochemistry and Integrative Medical Biology (T.H., Y.N., T.A., M. Suematsu); and Division of Geriatric Medicine (K.S.), Keio University School of Medicine, Tokyo, Japan; Precursory Research for Embryonic Science and Technology (PRESTO) (M. Sano),
| | - Takako Hishiki
- From the Department of Regenerative Medicine and Advanced Cardiac Therapeutics (J.E., M. Sano, T.K., S. Morizane, T.M., Y.K., Y.Z., H.I., F.H., K.F.); Cardiology Division (J.E., T.K., T.M., Y.K., S. Ogawa), Department of Internal Medicine; Department of Biochemistry and Integrative Medical Biology (T.H., Y.N., T.A., M. Suematsu); and Division of Geriatric Medicine (K.S.), Keio University School of Medicine, Tokyo, Japan; Precursory Research for Embryonic Science and Technology (PRESTO) (M. Sano),
| | - Ken Shinmura
- From the Department of Regenerative Medicine and Advanced Cardiac Therapeutics (J.E., M. Sano, T.K., S. Morizane, T.M., Y.K., Y.Z., H.I., F.H., K.F.); Cardiology Division (J.E., T.K., T.M., Y.K., S. Ogawa), Department of Internal Medicine; Department of Biochemistry and Integrative Medical Biology (T.H., Y.N., T.A., M. Suematsu); and Division of Geriatric Medicine (K.S.), Keio University School of Medicine, Tokyo, Japan; Precursory Research for Embryonic Science and Technology (PRESTO) (M. Sano),
| | - Shintaro Morizane
- From the Department of Regenerative Medicine and Advanced Cardiac Therapeutics (J.E., M. Sano, T.K., S. Morizane, T.M., Y.K., Y.Z., H.I., F.H., K.F.); Cardiology Division (J.E., T.K., T.M., Y.K., S. Ogawa), Department of Internal Medicine; Department of Biochemistry and Integrative Medical Biology (T.H., Y.N., T.A., M. Suematsu); and Division of Geriatric Medicine (K.S.), Keio University School of Medicine, Tokyo, Japan; Precursory Research for Embryonic Science and Technology (PRESTO) (M. Sano),
| | - Tomohiro Matsuhashi
- From the Department of Regenerative Medicine and Advanced Cardiac Therapeutics (J.E., M. Sano, T.K., S. Morizane, T.M., Y.K., Y.Z., H.I., F.H., K.F.); Cardiology Division (J.E., T.K., T.M., Y.K., S. Ogawa), Department of Internal Medicine; Department of Biochemistry and Integrative Medical Biology (T.H., Y.N., T.A., M. Suematsu); and Division of Geriatric Medicine (K.S.), Keio University School of Medicine, Tokyo, Japan; Precursory Research for Embryonic Science and Technology (PRESTO) (M. Sano),
| | - Yoshinori Katsumata
- From the Department of Regenerative Medicine and Advanced Cardiac Therapeutics (J.E., M. Sano, T.K., S. Morizane, T.M., Y.K., Y.Z., H.I., F.H., K.F.); Cardiology Division (J.E., T.K., T.M., Y.K., S. Ogawa), Department of Internal Medicine; Department of Biochemistry and Integrative Medical Biology (T.H., Y.N., T.A., M. Suematsu); and Division of Geriatric Medicine (K.S.), Keio University School of Medicine, Tokyo, Japan; Precursory Research for Embryonic Science and Technology (PRESTO) (M. Sano),
| | - Yan Zhang
- From the Department of Regenerative Medicine and Advanced Cardiac Therapeutics (J.E., M. Sano, T.K., S. Morizane, T.M., Y.K., Y.Z., H.I., F.H., K.F.); Cardiology Division (J.E., T.K., T.M., Y.K., S. Ogawa), Department of Internal Medicine; Department of Biochemistry and Integrative Medical Biology (T.H., Y.N., T.A., M. Suematsu); and Division of Geriatric Medicine (K.S.), Keio University School of Medicine, Tokyo, Japan; Precursory Research for Embryonic Science and Technology (PRESTO) (M. Sano),
| | - Hideyuki Ito
- From the Department of Regenerative Medicine and Advanced Cardiac Therapeutics (J.E., M. Sano, T.K., S. Morizane, T.M., Y.K., Y.Z., H.I., F.H., K.F.); Cardiology Division (J.E., T.K., T.M., Y.K., S. Ogawa), Department of Internal Medicine; Department of Biochemistry and Integrative Medical Biology (T.H., Y.N., T.A., M. Suematsu); and Division of Geriatric Medicine (K.S.), Keio University School of Medicine, Tokyo, Japan; Precursory Research for Embryonic Science and Technology (PRESTO) (M. Sano),
| | - Yoshiko Nagahata
- From the Department of Regenerative Medicine and Advanced Cardiac Therapeutics (J.E., M. Sano, T.K., S. Morizane, T.M., Y.K., Y.Z., H.I., F.H., K.F.); Cardiology Division (J.E., T.K., T.M., Y.K., S. Ogawa), Department of Internal Medicine; Department of Biochemistry and Integrative Medical Biology (T.H., Y.N., T.A., M. Suematsu); and Division of Geriatric Medicine (K.S.), Keio University School of Medicine, Tokyo, Japan; Precursory Research for Embryonic Science and Technology (PRESTO) (M. Sano),
| | - Satori Marchitti
- From the Department of Regenerative Medicine and Advanced Cardiac Therapeutics (J.E., M. Sano, T.K., S. Morizane, T.M., Y.K., Y.Z., H.I., F.H., K.F.); Cardiology Division (J.E., T.K., T.M., Y.K., S. Ogawa), Department of Internal Medicine; Department of Biochemistry and Integrative Medical Biology (T.H., Y.N., T.A., M. Suematsu); and Division of Geriatric Medicine (K.S.), Keio University School of Medicine, Tokyo, Japan; Precursory Research for Embryonic Science and Technology (PRESTO) (M. Sano),
| | - Kiyomi Nishimaki
- From the Department of Regenerative Medicine and Advanced Cardiac Therapeutics (J.E., M. Sano, T.K., S. Morizane, T.M., Y.K., Y.Z., H.I., F.H., K.F.); Cardiology Division (J.E., T.K., T.M., Y.K., S. Ogawa), Department of Internal Medicine; Department of Biochemistry and Integrative Medical Biology (T.H., Y.N., T.A., M. Suematsu); and Division of Geriatric Medicine (K.S.), Keio University School of Medicine, Tokyo, Japan; Precursory Research for Embryonic Science and Technology (PRESTO) (M. Sano),
| | - Alexander Martin Wolf
- From the Department of Regenerative Medicine and Advanced Cardiac Therapeutics (J.E., M. Sano, T.K., S. Morizane, T.M., Y.K., Y.Z., H.I., F.H., K.F.); Cardiology Division (J.E., T.K., T.M., Y.K., S. Ogawa), Department of Internal Medicine; Department of Biochemistry and Integrative Medical Biology (T.H., Y.N., T.A., M. Suematsu); and Division of Geriatric Medicine (K.S.), Keio University School of Medicine, Tokyo, Japan; Precursory Research for Embryonic Science and Technology (PRESTO) (M. Sano),
| | - Hiroki Nakanishi
- From the Department of Regenerative Medicine and Advanced Cardiac Therapeutics (J.E., M. Sano, T.K., S. Morizane, T.M., Y.K., Y.Z., H.I., F.H., K.F.); Cardiology Division (J.E., T.K., T.M., Y.K., S. Ogawa), Department of Internal Medicine; Department of Biochemistry and Integrative Medical Biology (T.H., Y.N., T.A., M. Suematsu); and Division of Geriatric Medicine (K.S.), Keio University School of Medicine, Tokyo, Japan; Precursory Research for Embryonic Science and Technology (PRESTO) (M. Sano),
| | - Fumiyuki Hattori
- From the Department of Regenerative Medicine and Advanced Cardiac Therapeutics (J.E., M. Sano, T.K., S. Morizane, T.M., Y.K., Y.Z., H.I., F.H., K.F.); Cardiology Division (J.E., T.K., T.M., Y.K., S. Ogawa), Department of Internal Medicine; Department of Biochemistry and Integrative Medical Biology (T.H., Y.N., T.A., M. Suematsu); and Division of Geriatric Medicine (K.S.), Keio University School of Medicine, Tokyo, Japan; Precursory Research for Embryonic Science and Technology (PRESTO) (M. Sano),
| | - Vasilis Vasiliou
- From the Department of Regenerative Medicine and Advanced Cardiac Therapeutics (J.E., M. Sano, T.K., S. Morizane, T.M., Y.K., Y.Z., H.I., F.H., K.F.); Cardiology Division (J.E., T.K., T.M., Y.K., S. Ogawa), Department of Internal Medicine; Department of Biochemistry and Integrative Medical Biology (T.H., Y.N., T.A., M. Suematsu); and Division of Geriatric Medicine (K.S.), Keio University School of Medicine, Tokyo, Japan; Precursory Research for Embryonic Science and Technology (PRESTO) (M. Sano),
| | - Takeshi Adachi
- From the Department of Regenerative Medicine and Advanced Cardiac Therapeutics (J.E., M. Sano, T.K., S. Morizane, T.M., Y.K., Y.Z., H.I., F.H., K.F.); Cardiology Division (J.E., T.K., T.M., Y.K., S. Ogawa), Department of Internal Medicine; Department of Biochemistry and Integrative Medical Biology (T.H., Y.N., T.A., M. Suematsu); and Division of Geriatric Medicine (K.S.), Keio University School of Medicine, Tokyo, Japan; Precursory Research for Embryonic Science and Technology (PRESTO) (M. Sano),
| | - Ikuroh Ohsawa
- From the Department of Regenerative Medicine and Advanced Cardiac Therapeutics (J.E., M. Sano, T.K., S. Morizane, T.M., Y.K., Y.Z., H.I., F.H., K.F.); Cardiology Division (J.E., T.K., T.M., Y.K., S. Ogawa), Department of Internal Medicine; Department of Biochemistry and Integrative Medical Biology (T.H., Y.N., T.A., M. Suematsu); and Division of Geriatric Medicine (K.S.), Keio University School of Medicine, Tokyo, Japan; Precursory Research for Embryonic Science and Technology (PRESTO) (M. Sano),
| | - Ryo Taguchi
- From the Department of Regenerative Medicine and Advanced Cardiac Therapeutics (J.E., M. Sano, T.K., S. Morizane, T.M., Y.K., Y.Z., H.I., F.H., K.F.); Cardiology Division (J.E., T.K., T.M., Y.K., S. Ogawa), Department of Internal Medicine; Department of Biochemistry and Integrative Medical Biology (T.H., Y.N., T.A., M. Suematsu); and Division of Geriatric Medicine (K.S.), Keio University School of Medicine, Tokyo, Japan; Precursory Research for Embryonic Science and Technology (PRESTO) (M. Sano),
| | - Yoshio Hirabayashi
- From the Department of Regenerative Medicine and Advanced Cardiac Therapeutics (J.E., M. Sano, T.K., S. Morizane, T.M., Y.K., Y.Z., H.I., F.H., K.F.); Cardiology Division (J.E., T.K., T.M., Y.K., S. Ogawa), Department of Internal Medicine; Department of Biochemistry and Integrative Medical Biology (T.H., Y.N., T.A., M. Suematsu); and Division of Geriatric Medicine (K.S.), Keio University School of Medicine, Tokyo, Japan; Precursory Research for Embryonic Science and Technology (PRESTO) (M. Sano),
| | - Shigeo Ohta
- From the Department of Regenerative Medicine and Advanced Cardiac Therapeutics (J.E., M. Sano, T.K., S. Morizane, T.M., Y.K., Y.Z., H.I., F.H., K.F.); Cardiology Division (J.E., T.K., T.M., Y.K., S. Ogawa), Department of Internal Medicine; Department of Biochemistry and Integrative Medical Biology (T.H., Y.N., T.A., M. Suematsu); and Division of Geriatric Medicine (K.S.), Keio University School of Medicine, Tokyo, Japan; Precursory Research for Embryonic Science and Technology (PRESTO) (M. Sano),
| | - Makoto Suematsu
- From the Department of Regenerative Medicine and Advanced Cardiac Therapeutics (J.E., M. Sano, T.K., S. Morizane, T.M., Y.K., Y.Z., H.I., F.H., K.F.); Cardiology Division (J.E., T.K., T.M., Y.K., S. Ogawa), Department of Internal Medicine; Department of Biochemistry and Integrative Medical Biology (T.H., Y.N., T.A., M. Suematsu); and Division of Geriatric Medicine (K.S.), Keio University School of Medicine, Tokyo, Japan; Precursory Research for Embryonic Science and Technology (PRESTO) (M. Sano),
| | - Satoshi Ogawa
- From the Department of Regenerative Medicine and Advanced Cardiac Therapeutics (J.E., M. Sano, T.K., S. Morizane, T.M., Y.K., Y.Z., H.I., F.H., K.F.); Cardiology Division (J.E., T.K., T.M., Y.K., S. Ogawa), Department of Internal Medicine; Department of Biochemistry and Integrative Medical Biology (T.H., Y.N., T.A., M. Suematsu); and Division of Geriatric Medicine (K.S.), Keio University School of Medicine, Tokyo, Japan; Precursory Research for Embryonic Science and Technology (PRESTO) (M. Sano),
| | - Keiichi Fukuda
- From the Department of Regenerative Medicine and Advanced Cardiac Therapeutics (J.E., M. Sano, T.K., S. Morizane, T.M., Y.K., Y.Z., H.I., F.H., K.F.); Cardiology Division (J.E., T.K., T.M., Y.K., S. Ogawa), Department of Internal Medicine; Department of Biochemistry and Integrative Medical Biology (T.H., Y.N., T.A., M. Suematsu); and Division of Geriatric Medicine (K.S.), Keio University School of Medicine, Tokyo, Japan; Precursory Research for Embryonic Science and Technology (PRESTO) (M. Sano),
| |
Collapse
|
48
|
Nakashima Y, Ohsawa I, Konishi F, Hasegawa T, Kumamoto S, Suzuki Y, Ohta S. Preventive effects of Chlorella on cognitive decline in age-dependent dementia model mice. Neurosci Lett 2009; 464:193-8. [PMID: 19699777 DOI: 10.1016/j.neulet.2009.08.044] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2009] [Revised: 07/29/2009] [Accepted: 08/18/2009] [Indexed: 02/04/2023]
Abstract
Oxidative stress is one of the major causes of age-dependent memory loss and cognitive decline. Cytotoxic aldehydes are derived from lipid peroxides and their accumulation may be responsible for age-dependent neurodegeneration, including Alzheimer's disease. Since aldehyde dehydrogenases detoxify such aldehydes, we constructed transgenic mice with mitochondrial aldehyde dehydrogenase 2 (ALDH2) activity deficiency (DAL101 mice) as an age-dependent dementia model. This model animal is age-dependently progressed by persistent oxidative stress, and thus enables us to investigate foods that prevent dementia. Since Chlorella, a kind of alga, exhibits various anti-oxidative effects, we investigated whether Chlorella has the potential to prevent age-dependent cognitive impairment. We fed Chlorella to DAL101 mice and investigated its effects on oxidative stress and the progression of cognitive decline using the Morris water-maze and object recognition tests. The diet with Chlorella tended to reduce oxidative stress and significantly prevented the decline of cognitive ability, as shown by both methods. Moreover, consumption of Chlorella decreased the number of activated astrocytes in the DAL101 brain. These findings suggest that the prolonged consumption of Chlorella has the potential to prevent the progression of cognitive impairment.
Collapse
Affiliation(s)
- Yuya Nakashima
- Research Laboratories, Chlorella Industry Co. Ltd., 1343 Hisatomi, Chikugo, Fukuoka 833-0056, Japan
| | | | | | | | | | | | | |
Collapse
|
49
|
Nakajima S, Ohsawa I, Nagata K, Ohta S, Ohno M, Ijichi T, Mikami T. Oral supplementation with melon superoxide dismutase extract promotes antioxidant defences in the brain and prevents stress-induced impairment of spatial memory. Behav Brain Res 2009; 200:15-21. [PMID: 19373977 DOI: 10.1016/j.bbr.2008.12.038] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The purpose of this study was to investigate the effect of antioxidant ingestion on stress-induced impairment of cognitive memory. Male C57BL/6 mice were divided into four groups as follows: (1) control mice (C mice) fed in a normal cage without immobilization; (2) restraint-stressed (RS mice) fed in a small cage; (3) vitamin E mice (VE mice), mice were fed in a small cage with a diet supplemented with vitamin E; (4) GliSODin mice (GS mice) fed in a small cage with a diet supplemented with GliSODin. RS, VE and GS mice were exposed to 12 h of immobilization daily. Five weeks later, spatial learning was measured using the Morris Water Maze (MWM) test. After water maze testing, we performed immunohistochemical analysis using 4-hydroxy-2-noneral (4-HNE) and an anti-Ki67 antibody. 4-HNE is a marker of lipid peroxidation. RS mice showed impaired spatial learning performance and an increased number of 4-HNE-positive cells in the granule cell layer (GCL) of the hippocampal dentate gyrus when compared to C mice. Moreover, RS mice showed a decreased number of Ki67-positive cells in the subgranular zone (SGZ). GS mice showed better spatial learning memory than RS mice. The number of 4-HNE-positive cells in the GCL of GS mice was significantly less than that of RS mice. The number of Ki67-positive cells in the SGZ of GS mice was significantly greater than that of RS mice. These finding suggests that GliSODin prevents stress-induced impairment of cognitive function and maintains neurogenesis in the hippocampus through antioxidant activity.
Collapse
Affiliation(s)
- Sanae Nakajima
- Department of Biochemistry and Cell Biology, Institute of Gerontology, Nippon Medical School, Kawasaki, Kanagawa 211-8533, Japan
| | | | | | | | | | | | | |
Collapse
|
50
|
Suzuki Y, Sano M, Hayashida K, Ohsawa I, Ohta S, Fukuda K. Are the effects of alpha-glucosidase inhibitors on cardiovascular events related to elevated levels of hydrogen gas in the gastrointestinal tract? FEBS Lett 2009; 583:2157-9. [PMID: 19505462 DOI: 10.1016/j.febslet.2009.05.052] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2009] [Revised: 05/28/2009] [Accepted: 05/31/2009] [Indexed: 01/13/2023]
Abstract
The major side-effect of treatment with alpha-glucosidase inhibitors, flatulence, occurs when undigested carbohydrates are fermented by colonic bacteria, resulting in gas formation. We propose that the cardiovascular benefits of alpha-glucosidase inhibitors are partly attributable to their ability to neutralise oxidative stress via increased production of H(2) in the gastrointestinal tract. Acarbose, which is an alpha-glucosidase inhibitor, markedly increased H(2) production, with a weaker effect on methane production. Our hypothesis is based on our recent discovery that H(2) acts as a unique antioxidant, and that when inhaled or taken orally as H(2)-dissolved water it ameliorates ischaemia-reperfusion injury and atherosclerosis development.
Collapse
Affiliation(s)
- Yoshihiko Suzuki
- Department of Biochemistry and Cell Biology, Institute of Development and Aging Science, Graduate School of Medicine, Nippon Medical School, Kawasaki City, Japan
| | | | | | | | | | | |
Collapse
|