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Kaiga A, Sato Y, Arakawa H, Rai T, Tojo A. Crescentic glomerulonephritis associated with syphilis: a case report and review of the literature. J Med Case Rep 2023; 17:549. [PMID: 38129918 PMCID: PMC10740279 DOI: 10.1186/s13256-023-04293-2] [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: 09/18/2023] [Accepted: 11/29/2023] [Indexed: 12/23/2023] Open
Abstract
BACKGROUND Crescentic glomerulonephritis with syphilis infection is rare, and the mechanism underlying the formation of glomerular capillary wall damage-induced crescent has not been elucidated. CASE PRESENTATION A 62-year-old Japanese male showed edema, eruption, and rapid deterioration of the renal function after an acute syphilis infection. A renal biopsy showed crescentic glomerulonephritis with C3 deposition in the glomerular capillary wall, and immunostaining for anti-Treponema pallidum antibody was weakly positive in some interstitium and one glomerulus. Electron microscopy revealed the presence of string-shaped structures in the glomerular capillary walls. After treatment with penicillin followed by prednisolone, the renal function and urinary abnormalities, including Treponema pallidum protein, disappeared. CONCLUSIONS Crescentic glomerulonephritis associated with syphilis showed a string-shaped deposition in the glomerular capillary and urinary Treponema pallidum protein excretion, and was effectively treated with penicillin and prednisolone.
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Affiliation(s)
- Akiko Kaiga
- Department of Nephrology & Hypertension, Dokkyo Medical University, 880 Kitakobayashi, Mubu, Tochigi, Japan
| | - Yuka Sato
- Department of Nephrology & Hypertension, Dokkyo Medical University, 880 Kitakobayashi, Mubu, Tochigi, Japan
| | - Haruna Arakawa
- Department of Nephrology & Hypertension, Dokkyo Medical University, 880 Kitakobayashi, Mubu, Tochigi, Japan
| | - Tatemitsu Rai
- Department of Nephrology & Hypertension, Dokkyo Medical University, 880 Kitakobayashi, Mubu, Tochigi, Japan
| | - Akihiro Tojo
- Department of Nephrology & Hypertension/Blood Purification Center, Dokkyo Medical University Hospital, 880 Kitakobayashi, Mubu, Tochigi, 321-0293, Japan.
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Tojo A, Abe M, Matsuyama KI. Direct observation of epoxy resin blocks for renal biopsy by low-vacuum scanning electron microscopy. Med Mol Morphol 2023; 56:206-216. [PMID: 37165248 PMCID: PMC10415507 DOI: 10.1007/s00795-023-00356-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 04/26/2023] [Indexed: 05/12/2023]
Abstract
To improve the resolution of low-vacuum scanning electron microscopy (LVSEM), the epoxy resin block for the transmission electron microscopy (TEM) was observed directly with LVSEM. After observing ultrathin sections from renal biopsies of IgA nephropathy, membranous nephropathy, lupus nephritis, diabetic nephropathy (DM), thin basement membrane disease (TBMD), Alport's syndrome, Fabry's disease, and renal amyloidosis, the epoxy resin blocks of the same sites were observed by LVSEM and compared. The LVSEM image of the epoxy resin block corresponds to the negative of the TEM image, and when the gradation is reversed, the LVSEM image was comparable to the TEM image. At a low magnification of 100 ×, the entire specimen, including the glomerulus, was obtained. LVSEM at 5000 × magnification was sufficient to identify paramesangial deposits in IgA nephropathy and subepithelial electron-dense deposits (EDD) and spikes in membranous nephropathy. Glomerular basement membrane thickening in DM and thinning in TBMD could be sufficiently diagnosed with LVSEM at 6000 ×. Accumulation of ceramide in Fabry's disease was easily identified, but amyloid fibril could not be identified by LVSEM. LVSEM of renal biopsy epoxy resin blocks can replace TEM up to moderate magnification.
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Affiliation(s)
- Akihiro Tojo
- Department of Nephrology and Hypertension, Dokkyo Medical University, 880 Kitakobayashi, Mibu, Tochigi, 321-0293, Japan.
| | - Makoto Abe
- Department of Nephrology and Hypertension, Dokkyo Medical University, 880 Kitakobayashi, Mibu, Tochigi, 321-0293, Japan
| | - Kin-Ichi Matsuyama
- Department of Diagnostic Pathology, Dokkyo Medical University, Mibu, Tochigi, Japan
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Saitoh S, Takaki T, Nakajima K, Wo B, Terashima H, Shimo S, Nguyen HB, Thai TQ, Kumamoto K, Kunisawa K, Nagao S, Tojo A, Ohno N, Takahashi K. Treatment of tubular damage in high-fat-diet-fed obese mice using sodium-glucose co-transporter inhibitors. PLoS One 2023; 18:e0281770. [PMID: 36780539 PMCID: PMC9925073 DOI: 10.1371/journal.pone.0281770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 01/31/2023] [Indexed: 02/15/2023] Open
Abstract
A long-term high-fat diet (HFD) causes obesity and changes in renal lipid metabolism and lysosomal dysfunction in mice, causing renal damage. Sodium-glucose co-transporter inhibitors, including phlorizin, exert nephroprotective effects in patients with chronic kidney disease, but the underlying mechanism remains unclear. A HFD or standard diet was fed to adult C57BL/6J male mice, and phlorizin was administered. Lamellar body components of the proximal tubular epithelial cells (PTECs) were investigated. After phlorizin administration in HFD-fed mice, sphingomyelin and ceramide in urine and tissues were assessed and label-free quantitative proteomics was performed using kidney tissue samples. Mitochondrial elongation by fusion was effective in the PTECs of HFD-fed obese mice under phlorizin administration, and many lamellar bodies were found in the apical portion of the S2 segment of the proximal tubule. Phlorizin functioned as a diuretic, releasing lamellar bodies from the apical membrane of PTECs and clearing the obstruction in nephrons. The main component of the lamellar bodies was sphingomyelin. On the first day of phlorizin administration in HFD-fed obese mice, the diuretic effect was increased, and more sphingomyelin was excreted through urine than in vehicle-treated mice. The expressions of three peroxisomal β-oxidation proteins involved in fatty acid metabolism were downregulated after phlorizin administration in the kidneys of HFD-fed mice. Fatty acid elongation protein levels increased with phlorizin administration, indicating an increase in long-chain fatty acids. Lamellar bodies accumulated in the proximal renal tubule of the S2 segment of the HFD-fed mice, indicating that the urinary excretion of lamellar bodies has nephroprotective effects.
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Affiliation(s)
- Sei Saitoh
- Department of Biomedical Molecular Sciences (Anatomy II), Fujita Health University School of Medicine, Toyoake, Japan
- * E-mail:
| | - Takashi Takaki
- Department of Anatomy, Showa University School of Medicine, Tokyo, Japan
- Center for Electron microscopy, Showa University School of Medicine, Tokyo, Japan
| | - Kazuki Nakajima
- Center for Joint Research Facilities Support, Research Promotion and Support Headquarters, Fujita Health University, Toyoake, Japan
- Institute for Glyco-core Research (iGCORE), Gifu University, Gifu, Japan
| | - Bao Wo
- Department of Anatomy and Molecular Histology, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo, Japan
- Department of Histology and Embryology, Medical College of Chifeng University, Chifeng, China
| | | | - Satoshi Shimo
- Department of Occupational Therapy, Health Science University, Fujikawaguchiko, Japan
| | - Huy Bang Nguyen
- Division of Neurobiology and Bioinformatics, National Institute for Physiological Sciences, Okazaki, Japan
- Department of Anatomy and Structural Biology, Graduate School of Medical Science, University of Yamanashi, Chuo, Japan
- Department of Anatomy, Faculty of Medicine, University of Medicine and Pharmacy (UMP), Ho Chi Minh, Vietnam
| | - Truc Quynh Thai
- Division of Neurobiology and Bioinformatics, National Institute for Physiological Sciences, Okazaki, Japan
- Department of Anatomy and Structural Biology, Graduate School of Medical Science, University of Yamanashi, Chuo, Japan
- Department of Histology Embryology Genetics, Faculty of Basic Medical Sciences, Pham Ngoc Thach University of Medicine, Ho Chi Minh, Vietnam
| | - Kanako Kumamoto
- Education and Research Facility of Animal Models for Human Diseases, Fujita Health University, Toyoake, Japan
| | - Kazuo Kunisawa
- Department of Regulatory Science for Evaluation & Development of Pharmaceuticals & Devices, Fujita Health University Graduate School of Health Sciences, Toyoake, Japan
| | - Shizuko Nagao
- Education and Research Facility of Animal Models for Human Diseases, Fujita Health University, Toyoake, Japan
| | - Akihiro Tojo
- Division of Nephrology & Hypertension, Dokkyo Medical University, Mibu, Japan
| | - Nobuhiko Ohno
- Division of Ultrastructural Research, National Institute of Physiological Sciences, Okazaki, Japan
- Department of Anatomy, Division of Histology and Cell Biology, Jichi Medical University, Shimotsuke, Japan
| | - Kazuo Takahashi
- Department of Biomedical Molecular Sciences (Anatomy II), Fujita Health University School of Medicine, Toyoake, Japan
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Ishimitsu T, Honda T, Tojo A, Rai T. PS-C26-11: THERAPEUTIC EFFECTS OF ADDING THIAZIDE DIURETIC OR MINERAL CORTICOID RECEPTOR BLOCKER IN HYPERTENSIVE PATIENTS GIVEN ARB AND CALCIUM CHANNEL BLOCKER. J Hypertens 2023. [DOI: 10.1097/01.hjh.0000917108.46026.af] [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: 01/15/2023]
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Arakawa H, Yokoyama S, Ohira T, Kang D, Honda K, Ueda Y, Tojo A. Juvenile Membranous Nephropathy Developed after Human Papillomavirus (HPV) Vaccination. Vaccines (Basel) 2022; 10:vaccines10091442. [PMID: 36146521 PMCID: PMC9502366 DOI: 10.3390/vaccines10091442] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 08/02/2022] [Revised: 08/25/2022] [Accepted: 08/30/2022] [Indexed: 02/05/2023] Open
Abstract
A 16-year-old girl with no history of renal disease had a fever of 38 °C after her second HPV vaccination and was identified as positive for proteinuria. As she maintained urinary protein of 3.10 g/gCr and 5-9 urinary red blood cells/HPF, a renal biopsy was performed and small spikes on PAM staining with the granular deposition of IgG1++ and IgG3+ on the glomerular capillary wall were discovered by immunofluorescence, although PLA2R immunostaining was negative. Analysis by electron microscope showed electron density deposition in the form of fine particles under the epithelium. The diagnosis was secondary membranous nephropathy stage II. Immunostaining with the anti-p16 INK4a antibody was positive for glomerular cells, and Western blot analysis of urinary protein showed a positive band for p16 INK4a. However, laser-microdissection mass spectrometry analysis of a paraffin section of glomeruli failed to detect HPV proteins. It is possible that the patient was already infected with HPV and administration of the HPV vaccine may have caused secondary membranous nephropathy.
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Affiliation(s)
- Haruna Arakawa
- Department of Nephrology & Hypertension, Dokkyo Medical University, Mibu 321-0293, Japan
| | - Shohei Yokoyama
- Department of Nephrology & Hypertension, Dokkyo Medical University, Mibu 321-0293, Japan
| | - Takehiro Ohira
- Department of Nephrology & Hypertension, Dokkyo Medical University, Mibu 321-0293, Japan
| | - Dedong Kang
- Department of Anatomy, Showa University School of Medicine, Tokyo 142-8555, Japan
| | - Kazuho Honda
- Department of Anatomy, Showa University School of Medicine, Tokyo 142-8555, Japan
| | - Yoshihiko Ueda
- Department of Pathology, Dokkyo Medical University Saitama Medical Center, Saitama 343-8555, Japan
| | - Akihiro Tojo
- Department of Nephrology & Hypertension, Dokkyo Medical University, Mibu 321-0293, Japan
- Correspondence: ; Tel.: +81-282-86-1111
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Ishimitsu A, Tojo A, Hirao J, Yokoyama S, Ohira T, Murayama Y, Ishimitsu T, Kang D, Honda K, Ehara T, Ishida K, Ueda Y. AL-Kappa Primary Amyloidosis with Apolipoprotein A-IV Deposition. Intern Med 2022; 61:871-876. [PMID: 35296622 PMCID: PMC8987257 DOI: 10.2169/internalmedicine.7955-21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
A 70-year-old woman with complaints of edema, general malaise, and hypotension was diagnosed with renal amyloidosis, and laser microdissection mass spectrometry revealed her amyloidosis to predominantly comprise the apolipoprotein A-IV type. The M-protein turned from negative to positive during the course, and a bone marrow biopsy showed smoldering myeloma. Treatment with bortezomib and dexamethasone failed to save her from heart failure six months after the onset. Western blotting of urine samples at the time of the renal biopsy showed that amyloid light-chain κ amyloidosis had been present since the onset. Unlike the myeloma, Congo red staining was positive in the plasma cells of the bone marrow.
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Affiliation(s)
- Akira Ishimitsu
- Department of Nephrology & Hypertension, Dokkyo Medical University, Japan
| | - Akihiro Tojo
- Department of Nephrology & Hypertension, Dokkyo Medical University, Japan
| | - Jun Hirao
- Department of Nephrology & Hypertension, Dokkyo Medical University, Japan
| | - Shohei Yokoyama
- Department of Nephrology & Hypertension, Dokkyo Medical University, Japan
| | - Takehiro Ohira
- Department of Nephrology & Hypertension, Dokkyo Medical University, Japan
| | - Yoshiki Murayama
- Department of Nephrology & Hypertension, Dokkyo Medical University, Japan
| | | | - Dedong Kang
- Department of Anatomy, Showa University School of Medicine, Japan
| | - Kazuho Honda
- Department of Anatomy, Showa University School of Medicine, Japan
| | - Takashi Ehara
- Department of Pathology, Shinshu University School of Medicine, Japan
| | - Kazuyuki Ishida
- Department of Diagnostic Pathology, Dokkyo Medical University, Japan
| | - Yoshihiko Ueda
- Department of Pathology, Dokkyo Medical University Saitama Medical Center, Japan
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Hatakeyama S, Tojo A, Satonaka H, Yamada NO, Senda T, Ishimitsu T. Decreased Podocyte Vesicle Transcytosis and Albuminuria in APC C-Terminal Deficiency Mice with Puromycin-Induced Nephrotic Syndrome. Int J Mol Sci 2021; 22:ijms222413412. [PMID: 34948207 PMCID: PMC8708520 DOI: 10.3390/ijms222413412] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 12/09/2021] [Accepted: 12/10/2021] [Indexed: 11/16/2022] Open
Abstract
In minimal change nephrotic syndrome, podocyte vesicle transport is enhanced. Adenomatous polyposis coli (APC) anchors microtubules to cell membranes and plays an important role in vesicle transport. To clarify the role of APC in vesicle transport in podocytes, nephrotic syndrome was induced by puromycin amino nucleoside (PAN) injection in mice expressing APC1638T lacking the C-terminal of microtubule-binding site (APC1638T mouse); this was examined in renal tissue changes. The kidney size and glomerular area of APC1638T mice were reduced (p = 0.014); however, the number of podocytes was same between wild-type (WT) mice and APC1638T mice. The ultrastructure of podocyte foot process was normal by electron microscopy. When nephrotic syndrome was induced, the kidneys of WT+PAN mice became swollen with many hyaline casts, whereas these changes were inhibited in the kidneys of APC1638T+PAN mice. Electron microscopy showed foot process effacement in both groups; however, APC1638T+PAN mice had fewer vesicles in the basal area of podocytes than WT+PAN mice. Cytoplasmic dynein-1, a motor protein for vesicle transport, and α-tubulin were significantly reduced in APC1638T+PAN mice associated with suppressed urinary albumin excretion compared to WT+PAN mice. In conclusion, APC1638T mice showed reduced albuminuria associated with suppressed podocyte vesicle transport when minimal change nephrotic syndrome was induced.
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Affiliation(s)
- Saaya Hatakeyama
- Department of Nephrology & Hypertension, Dokkyo Medical University, Tochigi 321-0293, Japan; (S.H.); (H.S.); (T.I.)
| | - Akihiro Tojo
- Department of Nephrology & Hypertension, Dokkyo Medical University, Tochigi 321-0293, Japan; (S.H.); (H.S.); (T.I.)
- Correspondence: ; Tel.: +81-282-86-1111
| | - Hiroshi Satonaka
- Department of Nephrology & Hypertension, Dokkyo Medical University, Tochigi 321-0293, Japan; (S.H.); (H.S.); (T.I.)
| | - Nami O. Yamada
- Department of Anatomy, Gifu University, Gifu 501-1193, Japan; (N.O.Y.); (T.S.)
| | - Takao Senda
- Department of Anatomy, Gifu University, Gifu 501-1193, Japan; (N.O.Y.); (T.S.)
| | - Toshihiko Ishimitsu
- Department of Nephrology & Hypertension, Dokkyo Medical University, Tochigi 321-0293, Japan; (S.H.); (H.S.); (T.I.)
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Ishimitsu A, Satonaka H, Furuichi M, Murayama Y, Tojo A, Ishimitsu T. Role of circulating endothelial progenitors in responsiveness to erythropoiesis-stimulating agents in hemodialysis patients. Ren Replace Ther 2021. [DOI: 10.1186/s41100-021-00374-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Though treatment of anemia in chronic kidney disease (CKD) patients has been improved remarkably by erythropoiesis-stimulating agents (ESA), hypo-responsiveness to ESA poses a persistent problem in a subgroup of CKD patients, especially those on dialysis, with deteriorated mortality or cardiovascular risks. Pathomechanism of this condition including cardiovascular implications has not been sufficiently investigated.
Methods
Clinical parameters of 101 chronic hemodialysis patients which included those hospitalized in our university hospital were examined cross-sectionally. As a marker estimating ESA hypo-responsiveness, erythropoietin resistance index (ERI) was calculated. Numbers of circulating endothelial progenitor cells (EPC) were measured by flow cytometry. Associations among values were analyzed by methods including multiple linear regression.
Results
Majority (93%) of the subjects were hospitalized patients with various comorbidities. ERI (18.4 [7.2–33.0] IU/week/kg/g/dL) and ESA dose (161.6 [75.0–320.9] IU/week/kg) of all the subjects were relatively high. Factors negatively correlated with EPC included age, HD vintage, CRP, pulse rate, ESA dose and ERI, while male sex and systolic blood pressure were positively correlated. By multiple linear regression analysis, age, sex and ERI (standardized coefficient beta − 0.202, p = 0.039) remained as the independently predicting factors of EPC (log CD133/Flk1+ EPC). Darbepoetin alpha was used in 65 patients, especially predominant when requiring higher ESA doses, but by correlation or multivariable analyses, this did not substantially modify the negative association between ERI and EPC.
Conclusions
ERI was independently associated with EPC paucity in a cohort with various comorbidities. This may suggest a link which connects ESA hypo-responsiveness to compromised cardiovascular prognosis of dialysis patients.
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Ishimitsu A, Tojo A, Satonaka H, Ishimitsu T. Eucommia ulmoides (Tochu) and its extract geniposidic acid reduced blood pressure and improved renal hemodynamics. Biomed Pharmacother 2021; 141:111901. [PMID: 34328117 DOI: 10.1016/j.biopha.2021.111901] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [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: 05/19/2021] [Revised: 07/01/2021] [Accepted: 07/06/2021] [Indexed: 10/20/2022] Open
Abstract
INTRODUCTION Eucommia ulmoides leaves are used as Tochu tea, which has a blood pressure lowering effect of unknown mechanism. PURPOSE AND METHODS The effects of Tochu tea and its component, geniposidic acid, on blood pressure and renal hemodynamics were investigated in Dahl salt-sensitive (DS) rats received 1% saline solution from 4 weeks of age. At 9 weeks of age, 1% saline alone (DSHS), Tochu tea extract added 1% saline (DSHS+T), or geniposidic acid added 1% saline (DSHS+G) was administered for another 4 weeks. DS rats fed with tap water were used as controls (DSLS). At 13 weeks, the blood pressure, the renal plasma flow (RPF) and the renal NADPH oxidase, endothelial nitric oxide synthase (eNOS) were examined. RESULTS Blood pressure in DSHS rats was significantly increased in comparison to DSLS (144 vs. 196 mmHg, p < 0.01), and was significantly reduced in DSHS+T (158 mmHg) and DSHS+G (162 mmHg) rats. RPF in DSHS+T rats was significantly higher than in DSHS rats (p < 0.05). The expression of NADPH oxidase in DSHS rats was enhanced in comparison to DSLS rats; however, it was suppressed in DSHS+T and DSHS+G rats, and the NO production by eNOS was increased; thus, RPF was improved. The urinary Na excretion in DSHS rats was higher than that in DSLS rats; however it was further increased in DSHS+T rats without changes in the tubular Na transporters. CONCLUSION Tochu tea and geniposidic acid suppressed NADPH oxidase, increased eNOS, and improved blood pressure and renal hemodynamics.
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Affiliation(s)
- Akira Ishimitsu
- Department of Nephrology & Hypertension, Dokkyo Medical University, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan
| | - Akihiro Tojo
- Department of Nephrology & Hypertension, Dokkyo Medical University, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan.
| | - Hiroshi Satonaka
- Department of Nephrology & Hypertension, Dokkyo Medical University, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan
| | - Toshihiko Ishimitsu
- Department of Nephrology & Hypertension, Dokkyo Medical University, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan
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Hirao J, Tojo A, Hatakeyama S, Satonaka H, Ishimitsu T. V-ATPase blockade reduces renal gluconeogenesis and improves insulin secretion in type 2 diabetic rats. Hypertens Res 2020; 43:1079-1088. [PMID: 32382157 DOI: 10.1038/s41440-020-0450-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 01/25/2020] [Revised: 03/28/2020] [Accepted: 03/30/2020] [Indexed: 12/16/2022]
Abstract
Vacuolar H+-adenosine triphosphatase (V-ATPase) stimulates vesicular acidification that may activate cytoplasmic enzymes, hormone secretion and membrane recycling of transporters. We investigated the effect of blockade of V-ATPase by bafilomycin B1 on renal gluconeogenesis, mitochondrial enzymes, and insulin secretion in type 2 diabetic rats. Spontaneous type 2 diabetic Torii rats were treated with intraperitoneal injection of bafilomycin B1 for 1 week, and the kidneys were examined after 24 h of starvation in metabolic cages. The renal expression and activity of V-ATPase were increased in the brush border membrane of the proximal tubules in diabetic rats. The blockade of V-ATPase by bafilomycin B1 reduced renal V-ATPase activity and urinary ammonium in diabetic rats. Treatment with bafilomycin suppressed the enhanced renal gluconeogenesis enzymes and mitochondrial electron transport enzymes in type 2 diabetic rats and reduced the renal cytoplasmic glucose levels. The insulin index and pancreatic insulin granules were decreased in diabetic rats with increased V-ATPase expression in islet cells, and treatment with bafilomycin B1 reversed these changes and increased the insulin secretion index. Hepatosteatosis in type 2 diabetic rats was ameliorated by bafilomycin treatment. As a consequence, treatment with bafilomycin B1 significantly decreased the plasma glucose level after 24 h of starvation in diabetic rats. In conclusion, a V-ATPase inhibitor improved plasma glucose levels in type 2 diabetes by inhibiting renal mitochondrial gluconeogenesis and improving insulin secretion.
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Affiliation(s)
- Jun Hirao
- Department of Nephrology and Hypertension, Dokkyo Medical University, Mibu, Tochigi, Japan
| | - Akihiro Tojo
- Department of Nephrology and Hypertension, Dokkyo Medical University, Mibu, Tochigi, Japan.
| | - Saaya Hatakeyama
- Department of Nephrology and Hypertension, Dokkyo Medical University, Mibu, Tochigi, Japan
| | - Hiroshi Satonaka
- Department of Nephrology and Hypertension, Dokkyo Medical University, Mibu, Tochigi, Japan
| | - Toshihiko Ishimitsu
- Department of Nephrology and Hypertension, Dokkyo Medical University, Mibu, Tochigi, Japan
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Abstract
RATIONALE Anti-glomerular basement membrane (GBM) disease is a T cell-mediated disease that has a poor prognosis with conventional therapy. We tested rituximab as a primary therapy to reduce anti-GBM antibody produced by B cells. PATIENT CONCERNS A 53-year old woman with complaints of a fever, headache and abdominal discomfort showed renal failure with elevated anti-GBM antibody, and renal biopsy revealed crescentic necrotizing glomerulonephritis with linear immunoglobulin G (IgG) 1 deposition along GBM. DIAGNOSES The patient's plasma contained autoantibodies against Goodpasture antigen, which is the NC domain of collagen IVα3, and CD4-positive helper T cells were found surrounding crescent glomeruli with the coexistence CD20-positive B cells. INTERVENTIONS Rituximab with steroid and plasma exchange. OUTCOMES The levels of autoantibody for Goodpasture antigen were reduced, and the patient was able to temporarily withdraw from hemodialysis. LESSONS B cell depletion with rituximab is effective as an initial therapy for anti-GBM disease.
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Affiliation(s)
- Mayu Uematsu-Uchida
- Department of Nephrology & Hypertension, Dokkyo Medical University, Mibu, Tochigi
| | - Takehiro Ohira
- Department of Nephrology & Hypertension, Dokkyo Medical University, Mibu, Tochigi
| | - Shigeki Tomita
- Department of Pathology, Juntendo University Urayasu Hospital, Urayasu, Chiba, Japan
| | - Hiroshi Satonaka
- Department of Nephrology & Hypertension, Dokkyo Medical University, Mibu, Tochigi
| | - Akihiro Tojo
- Department of Nephrology & Hypertension, Dokkyo Medical University, Mibu, Tochigi
| | - Toshihiko Ishimitsu
- Department of Nephrology & Hypertension, Dokkyo Medical University, Mibu, Tochigi
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Murayama Y, Uchida M, Tojo A, Ishimitsu T. Electron microscopy of urinary sediments in Fabry disease. Kidney Int 2018; 94:834. [DOI: 10.1016/j.kint.2018.04.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 04/06/2018] [Accepted: 04/11/2018] [Indexed: 11/17/2022]
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Tojo A, Hatakeyama S, Nangaku M, Ishimitsu T. H +-ATPase blockade reduced renal gluconeogenesis and plasma glucose in a diabetic rat model. Med Mol Morphol 2018; 51:89-95. [PMID: 29318388 PMCID: PMC5960008 DOI: 10.1007/s00795-017-0175-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Accepted: 12/15/2017] [Indexed: 01/05/2023]
Abstract
Vacuolar H+-adenosine triphosphatase (ATPase) plays important roles in urinary acid excretion, vesicular acidification to activate enzymes, and the membrane recycling of transporters in the kidney. As acidosis stimulates renal gluconeogenesis, we investigated the effect of blockade of H+-ATPase on renal gluconeogenesis in diabetic rats. Diabetes mellitus was induced by a single injection of streptozotocin, and a group of DM rats was treated with bafilomycin B1 intraperitoneally for 8 days. In diabetic rats, the renal expression and activity of H+-ATPase were increased with elevated urinary ammonium excretion. The blockade of H+-ATPase by bafilomycin B1 reduced the renal H+-ATPase activity and urinary ammonium excretion in diabetic rats. Treatment with bafilomycin suppressed the enhancement of the renal gluconeogenesis enzymes phosphoenol pyruvate carboxykinase and glucose-6-phosphatase in diabetic rats and reduced the renal cytoplasmic glucose levels, whereas hepatic gluconeogenesis did not change significantly. After a 24-h starvation period, bafilomycin decreased the plasma glucose level to a normal level in diabetic rats. The suppression of renal gluconeogenesis by an H+-ATPase inhibitor may therefore be a new therapeutic target for the treatment of diabetes mellitus.
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Affiliation(s)
- Akihiro Tojo
- Department of Cardiology and Nephrology, Dokkyo Medical University, 880 Kitakobayashi, Mibu, Tochigi, 321-0293, Japan.
- Division of Nephrology and Endocrinology, The University of Tokyo, Tokyo, Japan.
| | - Saaya Hatakeyama
- Division of Nephrology and Endocrinology, The University of Tokyo, Tokyo, Japan
| | - Masaomi Nangaku
- Division of Nephrology and Endocrinology, The University of Tokyo, Tokyo, Japan
| | - Toshihiko Ishimitsu
- Department of Cardiology and Nephrology, Dokkyo Medical University, 880 Kitakobayashi, Mibu, Tochigi, 321-0293, Japan
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14
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Tojo A, Hatakeyama S, Kinugasa S, Fukuda S, Sakai T. Enhanced podocyte vesicle transport in the nephrotic rat. Med Mol Morphol 2017; 50:86-93. [DOI: 10.1007/s00795-016-0151-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2016] [Accepted: 12/19/2016] [Indexed: 01/27/2023]
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15
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Mukai T, Nagamura-Inoue T, Shimazu T, Mori Y, Takahashi A, Tojo A. Neurosphere Formation Enhances the Neurogenic Differentiation Potential and Migratory Ability of Umbilical Cord-Mesenchymal Stromal Cells. Cytotherapy 2016. [DOI: 10.1016/j.jcyt.2016.03.161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Saito H, Hamasaki Y, Tojo A, Shintani Y, Shimizu A, Nangaku M. Phospholipase A2 receptor positive membranous nephropathy long after living donor kidney transplantation between identical twins. Nephrology (Carlton) 2016; 20 Suppl 2:101-4. [PMID: 26031599 DOI: 10.1111/nep.12458] [Citation(s) in RCA: 2] [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] [Accepted: 03/14/2015] [Indexed: 02/05/2023]
Abstract
Although membranous nephropathy (MN) is a commonly observed cause of post-transplant glomerulonephritis, distinguishing de novo from recurrent MN in kidney allograft is often difficult. Phospholipase A2 receptor (PLA2R) staining is useful for diagnosing recurrent MN in allografts similarly to idiopathic MN in native kidney. No specific treatment strategy has been established for MN, especially when accompanied with HCV infection in kidney transplant recipients. This report describes a 66-year-old man who was diagnosed as having PLA2R positive membranous nephropathy accompanied with already-known IgA nephropathy and HCV infection 26 years after kidney transplantation conducted between identical twins. PLA2R was detected along capillary loops, implying that this patient is affected by the same pathogenic mechanism as idiopathic MN, not secondary MN associated with other disorders such as HCV infection. The patient successfully achieved clinical remission after steroid therapy.
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Affiliation(s)
- Hisako Saito
- Division of Nephrology and Endocrinology, The University of Tokyo, Tokyo, Japan
| | - Yoshifumi Hamasaki
- Division of Nephrology and Endocrinology, The University of Tokyo, Tokyo, Japan
| | - Akihiro Tojo
- Division of Nephrology and Endocrinology, The University of Tokyo, Tokyo, Japan
| | - Yukako Shintani
- Department of Pathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Akira Shimizu
- Department of Analytic Human Pathology, Nippon Medical School, Tokyo, Japan
| | - Masaomi Nangaku
- Division of Nephrology and Endocrinology, The University of Tokyo, Tokyo, Japan
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17
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Sugawara Y, Honda K, Katagiri D, Nakamura M, Kawakami T, Nasu R, Hayashi A, Shintani Y, Tojo A, Noiri E, Kurokawa M, Fukayama M, Nangaku M. Umbilical Cord Blood Transplantation-associated Nephrotic Syndrome Successfully Treated by Low-density Lipoprotein Apheresis. Intern Med 2016; 55:2831-2836. [PMID: 27725544 PMCID: PMC5088545 DOI: 10.2169/internalmedicine.55.7017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
The development of nephrotic syndrome (NS) after umbilical cord transplantation (UBT) has been reported in only four cases to date. We herein report the case of a 50-year-old woman who developed NS 94 days after UBT. She fell into oliguria and required dialysis. A kidney biopsy revealed focal and segmental glomerulosclerosis. Although glucocorticoid monotherapy did not improve her condition, the addition of low-density lipoprotein (LDL) apheresis resulted in remission of NS, a drastic improvement in her renal function, and withdrawal from dialysis. To the best of our knowledge, this is the first report of UBT-associated NS treated with LDL apheresis.
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Affiliation(s)
- Yuka Sugawara
- Department of Nephrology and Endocrinology, The University of Tokyo, Japan
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18
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Abstract
The mechanism of activation of local renal renin-angiotensin system (RAS) has not been clarified in diabetes mellitus (DM). We hypothesized that the local renal RAS will be activated via increased glomerular filtration and tubular uptake of prorenin and angiotensinogen in diabetic kidney with microalbuminuria. Streptozotocin (STZ)-induced DM and control rats were injected with human prorenin and subsequently with human angiotensinogen. Human prorenin uptake was increased in podocytes, proximal tubules, macula densa, and cortical collecting ducts of DM rats where prorenin receptor (PRR) was expressed. Co-immunoprecipitation of kidney homogenates in DM rats revealed binding of human prorenin to the PRR and to megalin. The renal uptake of human angiotensinogen was increased in DM rats at the same nephron sites as prorenin. Angiotensin-converting enzyme was increased in podocytes, but decreased in the proximal tubules in DM rats, which may have contributed to unchanged renal levels of angiotensin despite increased angiotensinogen. The systolic blood pressure increased more after the injection of 20 μg of angiotensinogen in DM rats than in controls, accompanied by an increased uptake of human angiotensinogen in the vascular endothelium. In conclusion, endocytic uptake of prorenin and angiotensinogen in the kidney and vasculature in DM rats was contributed to increased tissue RAS and their pressor response to angiotensinogen.
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Affiliation(s)
- Akihiro Tojo
- Division of Nephrology and Endocrinology, The University of Tokyo, Tokyo, Japan
- Correspondence: Akihiro Tojo, Division of Nephrology and Endocrinology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan, Tel +81 3 3815 5411 ext 37219, Fax +81 3 3814 0021, Email
| | - Satoshi Kinugasa
- Division of Nephrology and Endocrinology, The University of Tokyo, Tokyo, Japan
| | - Toshiro Fujita
- Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan
| | - Christopher S Wilcox
- Division of Nephrology and Hypertension, Center for Hypertension, Kidney and Vascular Research, Georgetown University, Washington, DC, USA
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Tojo A, Asaba K, Kinugasa S, Ikeda Y, Shintani Y, Fukayama M, Nangaku M. The reduced expression of proximal tubular transporters in acquired Fanconi syndrome with κ light chain deposition. Med Mol Morphol 2015; 49:48-52. [PMID: 26141649 DOI: 10.1007/s00795-015-0114-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [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: 05/12/2015] [Accepted: 06/23/2015] [Indexed: 11/26/2022]
Abstract
In a case of acquired Fanconi syndrome associated with smoldering myeloma, we confirmed the deposition of protease-resistant κ light chain proteins in a proximal tubular injury and found the decreased expression of apical tubular transporters including sodium glucose co-transporter, sodium phosphate co-transporter, uric acid transporter 1, and a decrease of Na(+)/K(+)-ATPase in the basolateral membrane. The protease-resistant kappa light chain has a pathological role in the expression of tubular transporters in the proximal tubule and causes Fanconi syndrome associated with smoldering myeloma.
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Affiliation(s)
- Akihiro Tojo
- Division of Nephrology and Endocrinology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
| | - Kensuke Asaba
- Division of Nephrology and Endocrinology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Satoshi Kinugasa
- Division of Nephrology and Endocrinology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Yoichiro Ikeda
- Division of Nephrology and Endocrinology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Yukako Shintani
- Department of Pathology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Masashi Fukayama
- Department of Pathology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Masaomi Nangaku
- Division of Nephrology and Endocrinology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
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20
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Affiliation(s)
- H Endou
- Department of Pharmacology, Faculty of Medicine, University of Tokyo, Japan
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21
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Abstract
The kidney plays an important role in gluconeogenesis during starvation. To clarify the anti-diabetic action of angiotensin receptor blockers, we examined the effects of telmisartan on the sodium-glucose co-transporters (SGLT) and the pathways of renal gluconeogenesis in streptozotocin-induced diabetes mellitus (DM) rats. At 4 weeks, the DM rats treated with/without telmisartan for 2 weeks and normal control rats were used for the study after a 24-hour fast. SGLT2 expressed on the brush border membrane of the proximal convoluted tubules increased in the DM rats, but decreased in the rats treated with telmisartan. The expression of restriction enzymes of gluconeogenesis, glucose-6-phosphatase, and phosphoenolpyruvate carboxykinase increased in the proximal tubules in the DM rats, whereas these enzymes decreased in the kidneys of the rats treated with telmisartan. The elevated cytoplasmic glucose-6-phosphate and glucose levels in the kidney of DM rats significantly decreased in those treated with telmisartan, whereas those levels in the liver did not show significant change. Meanwhile, the high plasma glucose levels in the DM rats during the intravenous insulin tolerance tests were ameliorated by telmisartan. The increased fasting plasma glucose levels after 24 hours of starvation in the DM rats thus returned to the control levels by telmisartan treatment. In conclusion, the increased renal SGLT2 expression, elevated renal gluconeogenesis enzymes and extent of insulin-resistance in the DM rats were ameliorated by telmisartan therapy, thus resulting in decreased plasma glucose levels after 24 hours of fasting.
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Affiliation(s)
- Akihiro Tojo
- Division of Nephrology and Endocrinology, The University of Tokyo, Tokyo, Japan
- Correspondence: Akihiro Tojo, Division of Nephrology and Endocrinology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan, Tel +81 3 3815 5411 ext 37219, Fax +81 3 3814 0021, Email
| | - Saaya Hatakeyama
- Division of Nephrology and Endocrinology, The University of Tokyo, Tokyo, Japan
| | - Satoshi Kinugasa
- Division of Nephrology and Endocrinology, The University of Tokyo, Tokyo, Japan
| | - Masaomi Nangaku
- Division of Nephrology and Endocrinology, The University of Tokyo, Tokyo, Japan
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22
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Konuma T, Kato S, Yuji K, Ohno N, Uchimaru K, Takahashi S, Tojo A. Clearance of blasts from peripheral blood during induction chemotherapy using exponential decay model predicts complete remission and long-term survival in adult acute myeloid leukemia. Int J Lab Hematol 2014; 37:e59-62. [PMID: 25308202 DOI: 10.1111/ijlh.12302] [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: 11/28/2022]
Affiliation(s)
- T Konuma
- Department of Hematology/Oncology, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan.
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23
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Hirahashi J, Kawahata K, Arita M, Iwamoto R, Hishikawa K, Honda M, Hamasaki Y, Tanaka M, Okubo K, Kurosawa M, Takase O, Nakakuki M, Saiga K, Suzuki K, Kawachi S, Tojo A, Seki G, Marumo T, Hayashi M, Fujita T. Immunomodulation with eicosapentaenoic acid supports the treatment of autoimmune small-vessel vasculitis. Sci Rep 2014; 4:6406. [PMID: 25230773 PMCID: PMC4166948 DOI: 10.1038/srep06406] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Accepted: 07/11/2014] [Indexed: 12/13/2022] Open
Abstract
Small-vessel vasculitis is a life-threatening autoimmune disease that is frequently associated with anti-neutrophil cytoplasmic antibodies (ANCAs). Conventional immunotherapy including steroids and cyclophosphamide can cause serious adverse events, limiting the efficacy and safety of treatment. Eicosapentaenoic acid (EPA), a key component of fish oil, is an omega-3 polyunsaturated fatty acid widely known to be cardioprotective and beneficial for vascular function. We report two elderly patients with systemic ANCA-associated vasculitis (AAV) in whom the administration of EPA in concert with steroids safely induced and maintained remission, without the use of additioal immunosuppressants. To explore the mechanisms by which EPA enhances the treatment of AAV, we employed SCG/Kj mice as a spontaneous murine model of AAV. Dietary enrichment with EPA significantly delayed the onset of crescentic glomerulonephritis and prolonged the overall survival. EPA-derived anti-inflammatory lipid mediators and their precursors were present in the kidney, plasma, spleen, and lungs in the EPA-treated mice. Furthermore, a decrease in ANCA production and CD4/CD8-double negative T cells, and an increase in Foxp3(+) regulatory T cells in the lymph nodes of the kidney were observed in the EPA-treated mice. These clinical and experimental observations suggest that EPA can safely support and augment conventional therapy for treating autoimmune small-vessel vasculitis.
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Affiliation(s)
- Junichi Hirahashi
- 1] Department of Nephrology and Endocrinology, Graduate School of Medicine, The University of Tokyo [2] Apheresis and Dialysis Center, School of Medicine, Keio University
| | - Kimito Kawahata
- Department of Allergy and Rheumatology, Graduate School of Medicine, The University of Tokyo
| | - Makoto Arita
- 1] Department of Health Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo [2]
| | - Ryo Iwamoto
- Department of Health Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo
| | - Keiichi Hishikawa
- Department of Advanced Nephrology and Regenerative Medicine, Graduate School of Medicine, The University of Tokyo
| | - Mie Honda
- 1] Department of Health Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo [2]
| | - Yoshifumi Hamasaki
- Department of Nephrology and Endocrinology, Graduate School of Medicine, The University of Tokyo
| | - Mototsugu Tanaka
- Department of Nephrology and Endocrinology, Graduate School of Medicine, The University of Tokyo
| | - Koshu Okubo
- Department of Nephrology and Endocrinology, Graduate School of Medicine, The University of Tokyo
| | - Miho Kurosawa
- Department of Nephrology and Endocrinology, Graduate School of Medicine, The University of Tokyo
| | - Osamu Takase
- Department of Advanced Nephrology and Regenerative Medicine, Graduate School of Medicine, The University of Tokyo
| | - Masanori Nakakuki
- Development Research, Pharmaceutical Research Center, Mochida Pharmaceutical Co., Ltd
| | - Kan Saiga
- Pharmaceutical Research Laboratories, Nippon Kayaku Co. Ltd
| | - Kazuo Suzuki
- Inflammation Program, Chiba University Graduate School of Medicine
| | - Shoji Kawachi
- Division of Anesthesia, Surgical Operation Department, National Center for Global Health and Medicine
| | - Akihiro Tojo
- Department of Nephrology and Endocrinology, Graduate School of Medicine, The University of Tokyo
| | - George Seki
- Department of Nephrology and Endocrinology, Graduate School of Medicine, The University of Tokyo
| | - Takeshi Marumo
- Clinical Epigenetics, Research Center for Advanced Science and Technology, The University of Tokyo
| | | | - Toshiro Fujita
- 1] Department of Nephrology and Endocrinology, Graduate School of Medicine, The University of Tokyo [2] Clinical Epigenetics, Research Center for Advanced Science and Technology, The University of Tokyo
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Konuma T, Kato S, Ooi J, Oiwa-Monna M, Ebihara Y, Mochizuki S, Yuji K, Ohno N, Kawamata T, Jo N, Yokoyama K, Uchimaru K, Tojo A, Takahashi S. Impact of sex incompatibility on the outcome of single-unit cord blood transplantation for adult patients with hematological malignancies. Bone Marrow Transplant 2014; 49:634-9. [DOI: 10.1038/bmt.2014.10] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Revised: 12/02/2013] [Accepted: 12/02/2013] [Indexed: 01/18/2023]
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Tojo A. Doppler ultrasonography and hypertensive target organ damage. Anadolu Kardiyol Derg 2014; 14:16-17. [PMID: 24342002 DOI: 10.5152/akd.2013.12677] [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] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Affiliation(s)
- Akihiro Tojo
- Division of Nephrology and Endocrinology, The University of Tokyo; Tokyo-Japan.
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26
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Nagamura-Inoue T, Yamamoto Y, Kobayashi S, Yuzawa M, He H, Tsunoda H, Tojo A. Impact of mTOR inhibitor, everolimus on induced regulatory T cells derived from cord blood. Cytotherapy 2013. [DOI: 10.1016/j.jcyt.2013.01.162] [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: 11/30/2022]
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27
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Mae H, Ooi J, Takahashi S, Kato S, Kawakita T, Ebihara Y, Tsuji K, Nagamura F, Echizen H, Tojo A. Acute kidney injury after myeloablative cord blood transplantation in adults: the efficacy of strict monitoring of vancomycin serum trough concentrations. Transpl Infect Dis 2013; 15:181-6. [PMID: 23279721 DOI: 10.1111/tid.12038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Revised: 08/13/2012] [Accepted: 08/18/2012] [Indexed: 12/01/2022]
Abstract
BACKGROUND Acute kidney injury (AKI) is a common medical complication after myeloablative allogeneic stem cell transplantation (SCT). We have previously performed a retrospective analysis of AKI after cord blood transplantation (CBT) in adults, and found that the maximum of vancomycin (VCM) trough levels were significantly higher in patients with AKI. Following these results, we have monitored VCM serum trough concentrations more strictly, to not exceed 10.0 mg/L, since 2008. METHODS In this report, we performed an analysis of AKI in a new group of 38 adult patients with hematological malignancies treated with unrelated CBT after myeloablative conditioning between January 2008 and July 2011. RESULTS Cumulative incidence of AKI at day 100 after CBT was 34% (95% confidence interval 19-50). The median of the maximum value of VCM trough was 8.8 (4.5-12.2) mg/L. In multivariate analysis, no factor was associated with the incidence of AKI. No transplant-related mortality was observed. The probability of disease-free survival at 2 years was 83%. CONCLUSION These findings suggest that strict monitoring of VCM serum trough concentrations has a beneficial effect on outcomes of CBT.
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Affiliation(s)
- H Mae
- Department of Pharmacy, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo, Japan
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Hayashi M, Tojo A, Shimosawa T, Fujita T. The role of adrenomedullin in the renal NADPH oxidase and (pro)renin in diabetic mice. J Diabetes Res 2013; 2013:134395. [PMID: 23957015 PMCID: PMC3728500 DOI: 10.1155/2013/134395] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Accepted: 06/25/2013] [Indexed: 11/17/2022] Open
Abstract
Adrenomedullin has an antioxidative action and protects organs in various diseases. To clarify the role of adrenomedullin in diabetic nephropathy, we investigated the NADPH oxidase expression, renin-secreting granular cell (GC) hyperplasia, and glomerular matrix expansion in the streptozotocin (STZ)-induced diabetic adrenomedullin gene knockout (AMKO) mice compared with the STZ-diabetic wild mice at 10 weeks. The NADPH oxidase p47phox expression and lipid peroxidation products were enhanced in the glomeruli of the diabetic mice compared with that observed in the controls in both wild and AMKO mice. These changes were more obvious in the AMKO mice than in the wild mice. Glomerular mesangial matrix expansion was more severe in the diabetic AMKO mice than in the diabetic wild mice and exhibited a positive correlation with the degree of lipid peroxidation products in the glomeruli. Proteinuria was significantly higher in the diabetic AMKO mice than in the diabetic wild mice. The GC hyperplasia score and the renal prorenin expression were significantly increased in the diabetic AMKO mice than in the diabetic wild mice, and a positive correlation was observed with the NADPH oxidase expression in the macula densa. The endogenous adrenomedullin gene exhibits an antioxidant action via the inhibition of NADPH oxidase probably by suppressing the local renin-angiotensin system.
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Affiliation(s)
- Michio Hayashi
- Department of Internal Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan
| | - Akihiro Tojo
- Division of Nephrology and Endocrinology, Department of Internal Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan
- *Akihiro Tojo:
| | - Tatsuo Shimosawa
- Department of Internal Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan
| | - Toshiro Fujita
- Department of Internal Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan
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Ebihara Y, Takedani H, Ishige I, Nagamura-Inoue T, Wakitani S, Tojo A, Tsuji K. Feasibility of autologous bone marrow mesenchymal stem cells cultured with autologous serum for treatment of haemophilic arthropathy. Haemophilia 2012. [PMID: 23205598 DOI: 10.1111/hae.12056] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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30
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Ikeda Y, Nangaku M, Ishibashi Y, Hirohama D, Uozaki H, Tojo A, Ishikawa A, Fujita T. A case of de novo focal segmental glomerulosclerosis occurred one and half years after kidney transplantation supposed to be caused by calcineurin inhibitor. Clin Transplant 2012; 26 Suppl 24:76-80. [PMID: 22747481 DOI: 10.1111/j.1399-0012.2012.01640.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A 64-yr-old man with end-stage kidney disease caused by hypertensive nephrosclerosis underwent living-unrelated ABO-identical kidney transplantation (KTx) at the age of 60 yr from his 60-yr-old wife. Maintenance trough concentration of cyclosporine A (CsA) was 100 ± 30 ng/mL. Five months after KTx, proteinuria gradually increased to around 1 g/d. TRBx at eight months after KTx revealed the new-onset alteration of mild arteriolosclerosis with intimal hyalinosis, which might reflect calcineurin inhibitor (CNI)-associated arteriopathy (CAA). Nearly one and half years after KTx, urinary protein excretion became nearly 2 g/d. TRBx revealed the advanced CAA and findings of focal segmental glomerulosclerosis (FSGS). Then, CNI was switched from CsA to tacrolimus (TAC). TRBx at two and half years after KTx revealed progressed arteriolar transmural thickening and striped fibrosis, which were supposed to be induced by an increase in serum TAC concentration because of acute enterocolitis. Then, TAC dose was reduced to serum trough concentration 5-8 ng/mL, but urinary protein excretion was increased up to 10 g/d. Reduction of TAC to trough concentration 2.0 ± 0.5 ng/mL reduced urinary protein excretion. Attempts to elevate TAC trough concentration within normal range (4-8 ng/mL) reproducibly induced the recurrence of an increase in sCr or urinary protein excretion. All these findings supported the etiology of graft dysfunction, and proteinuria of this case was FSGS.
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Affiliation(s)
- Yoichiro Ikeda
- Division of Nephrology and Endocrinology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan.
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31
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Hirahashi J, Jo A, Ueda K, Tojo A, Fujita T. Successful treatment of antineutrophil cytoplasmic antibody-associated vasculitis with eicosapentaenoic acid. Ann Intern Med 2012; 156:755-6. [PMID: 22586017 DOI: 10.7326/0003-4819-156-10-201205150-00023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Hanamura K, Tojo A, Kinugasa S, Asaba K, Onozato ML, Uozaki H, Fukayama M, Fujita T. Detection of myeloperoxidase in membranous nephropathy-like deposits in patients with anti-neutrophil cytoplasmic antibody–associated glomerulonephritis. Hum Pathol 2011; 42:649-58. [DOI: 10.1016/j.humpath.2010.08.020] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2010] [Revised: 08/13/2010] [Accepted: 08/20/2010] [Indexed: 11/30/2022]
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Tsukada N, Takahashi S, Ooi J, Kato S, Kawakita T, Nagamura F, Yamaguchi T, Tojo A, Asano S. Myeloablative Unrelated Cord Blood Transplantation From Grafts With Three HLA Antigen Mismatches Resulted in Superior Outcomes for Patients With De Novo Acute Leukemias. Biol Blood Marrow Transplant 2011. [DOI: 10.1016/j.bbmt.2010.12.551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Kinugasa S, Tojo A, Sakai T, Fujita T. Silver-enhanced immunogold scanning electron microscopy using vibratome sections of rat kidneys: detection of albumin filtration and reabsorption. Med Mol Morphol 2011; 43:218-25. [DOI: 10.1007/s00795-010-0500-9] [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: 11/26/2009] [Accepted: 02/02/2010] [Indexed: 10/18/2022]
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Tojo A, Aizawa K. Dissolution and Degradation of Bacillus thuringiensis delta-Endotoxin by Gut Juice Protease of the Silkworm Bombyx mori. Appl Environ Microbiol 2010; 45:576-80. [PMID: 16346206 PMCID: PMC242326 DOI: 10.1128/aem.45.2.576-580.1983] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The dissolution and degradation of dagger-endotoxin (crystal) of Bacillus thuringiensis subsp. kurstaki strain HD-1 were investigated. Crystals were dissolved in 0.1 M phosphate-carbonate-NaOH buffer at pH > 12. Swelling of crystals occurred in the buffer between pH 10 and 11, and crystals dissolved in the same buffer supplemented with gut juice protease of the silkworm Bombyx mori. The proteolytic dissolution of crystals occurred after a time lag of several minutes in 0.1 M carbonate-NaOH buffer, pH 10.2. The time lag was not observed when crystals were suspended in the buffer for 30 min before the addition of protease. After the dissolution of the crystals and further degradation of the solubilized protein, the appearance of a toxic protein with a molecular weight of 59,000, designated P-59, was observed. Lower-molecular-weight peptides (less than 40,000) showed no toxicity to the silkworm larvae on feeding. Digestion of the 120,000-dalton subunit of the crystal by gut juice protease also produced P-59. These observations suggest the occurrence of a similar process in vivo, i.e., the swelling of crystals due to the alkalinity of gut juice and the production of P-59, dependent on the hydrolysis of swollen crystals by gut juice protease.
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Affiliation(s)
- A Tojo
- Institute of Biological Control, Faculty of Agriculture, Kyushu University, Fukuoka 812, Japan
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Murohashi M, Hinohara K, Kuroda M, Isagawa T, Tsuji S, Kobayashi S, Umezawa K, Tojo A, Aburatani H, Gotoh N. Gene set enrichment analysis provides insight into novel signalling pathways in breast cancer stem cells. Br J Cancer 2009; 102:206-12. [PMID: 19997106 PMCID: PMC2813736 DOI: 10.1038/sj.bjc.6605468] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [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] [Indexed: 12/16/2022] Open
Abstract
Background: Tumour-initiating cells (TICs) or cancer stem cells can exist as a small population in malignant tissues. The signalling pathways activated in TICs that contribute to tumourigenesis are not fully understood. Methods: Several breast cancer cell lines were sorted with CD24 and CD44, known markers for enrichment of breast cancer TICs. Tumourigenesis was analysed using sorted cells and total RNA was subjected to gene expression profiling and gene set enrichment analysis (GSEA). Results: We showed that several breast cancer cell lines have a small population of CD24−/low/CD44+ cells in which TICs may be enriched, and confirmed the properties of TICs in a xenograft model. GSEA revealed that CD24−/low/CD44+ cell populations are enriched for genes involved in transforming growth factor-β, tumour necrosis factor, and interferon response pathways. Moreover, we found the presence of nuclear factor-κB (NF-κB) activity in CD24−/low/CD44+ cells, which was previously unrecognised. In addition, NF-κB inhibitor dehydroxymethylepoxyquinomicin (DHMEQ) prevented tumourigenesis of CD24−/low/CD44+ cells in vivo. Conclusion: Our findings suggest that signalling pathways identified using GSEA help to identify molecular targets and biomarkers for TIC-like cells.
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Affiliation(s)
- M Murohashi
- Division of Systems Biomedical Technology, Institute of Medical Science, University of Tokyo, Tokyo, Japan
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Unuma K, Tojo A, Harada K, Saka K, Nakajima M, Ishii T, Fujita T, Yoshida KI. Autopsy report on pseudo-Bartter syndrome with renal calcification induced by diuretics and diet pills. BMJ Case Rep 2009; 2009:bcr12.2008.1380. [PMID: 21686346 DOI: 10.1136/bcr.12.2008.1380] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
A woman in her mid-forties had repeated vomiting and diarrhoea accompanied by muscle weakness soon after she started taking seven different diet pills imported from Thailand. After she had taken the pills for 8 days, respiratory depression progressed rapidly to arrest. Blood tests at the Emergency Department showed severe hypokalaemia with metabolic alkalosis. We diagnosed that she had developed pseudo-Bartter syndrome from the findings based on ionic abnormalities and high renin and aldosterone levels, and hyperplasia of the juxtaglomerular apparatus. A postmortem blood analysis indicated subtherapeutic levels of furosemide. We concluded that the patient died from pseudo-Bartter syndrome, which was triggered by chronic self-administration of furosemide and aggravated by the diet pills. This is the first pseudo-Bartter syndrome autopsy report to show histological localisation of calcification in the kidneys.
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Affiliation(s)
- Kana Unuma
- The University of Tokyo, Forensic Medicine, 7-3-1 Hongo, Bunkyo-ku, 113-0033 Tokyo, Japan
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Tsukada N, Takahashi S, Ooi J, Tomonari A, Mae H, Konuma T, Kato S, Sato A, Kasahara S, Monma F, Oiwa-Monna M, Asano S, Tojo A. The Importance of Blood Cyclosporine Level During Four Weeks After Unrelated Cord Blood Transplantation to Prevent Severe Graft-Versus-Host Disease. Biol Blood Marrow Transplant 2009. [DOI: 10.1016/j.bbmt.2008.12.152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Asaba K, Tojo A, Onozato ML, Kinugasa S, Miyazaki H, Miyashita K, Uehara Y, Hirata Y, Kimura K, Goto A, Omata M, Fujita T. Long-term renal prognosis of IgA nephropathy with therapeutic trend shifts. Intern Med 2009; 48:883-90. [PMID: 19483356 DOI: 10.2169/internalmedicine.48.1938] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [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: 11/06/2022] Open
Abstract
OBJECTIVE We compared the effect of treatments in the long-term renal survival of IgA nephropathy. METHODS One hundred and fourteen patients with biopsy-proven IgA nephropathy were retrospectively divided into 4 groups, reflecting shifts in treatment trends from 1985 to 2005: patients without treatment (no treatment group; n=36), patients treated only with anti-platelet drugs (anti-platelet group; n=12), those treated mainly with angiotensin-converting enzyme (ACE) inhibitors or angiotensin receptor blockers (ARBs) (ACEI/ARB group; n =29), and prednisolone-treated patients (PSL group; n =37). RESULTS Baseline blood pressure, serum creatinine and renal histological findings were similar among the 4 groups; however, the urinary protein level was significantly severer in the PSL group. After a mean follow-up of 7.0+/-0.5 years, end-stage renal disease occurred in 11 patients (31%) in the no treatment group, 5 patients (42%) in the anti-platelet group and 3 patients (8%) in the PSL group, but in only 1 patient (3%) in the ACEI/ARB group. Kaplan-Meier renal survival after 20 years was significantly better in the ACEI/ARB group than in the anti-platelet group or in the no treatment group (p<0.05). The patients that reached complete remission (CR) by steroid therapy showed less baseline urinary protein and milder histological lesions than those who did not reach CR. The non-CR group showed increases in serum creatinine and eGFR reduction rate. CONCLUSION Treatment with renin-angiotensin system inhibitors showed the greatest improvement of 20-year renal survival in IgA nephropathy patients. Steroid therapy achieved complete remission in some early-stage cases.
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Affiliation(s)
- Kensuke Asaba
- Department of Internal Medicine, University of Tokyo, Tokyo
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Konuma T, Ooi J, Takahashi S, Tomonari A, Tsukada N, Kato S, Sato A, Monma F, Hongo E, Uchimaru K, Tojo A, Asano S. Donor cell-derived myelodysplastic syndrome after cord blood transplantation. Bone Marrow Transplant 2008; 43:429-31. [PMID: 18978827 DOI: 10.1038/bmt.2008.344] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ooi J, Takahashi S, Tomonari A, Tsukada N, Konuma T, Kato S, Kasahara S, Sato A, Monma F, Nagamura F, Iseki T, Tojo A, Asano S. Unrelated cord blood transplantation after myeloablative conditioning in adults with ALL. Bone Marrow Transplant 2008; 43:455-9. [PMID: 18955981 DOI: 10.1038/bmt.2008.347] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We analyzed the disease-specific outcomes of adult ALL treated with cord blood transplantation (CBT) after myeloablative conditioning. Between October 2000 and November 2007, 27 adult patients with ALL were treated with unrelated CBT. All patients received four fractionated 12 Gy TBI and chemotherapy as myeloablative conditioning. The median age was 36 years, the median weight was 57 kg and the median number of nucleated cells was 2.47 x 10(7)/kg. All patients received a single and HLA-mismatched cord blood unit. The cumulative incidence of neutrophil recovery at day 30 and platelet recovery at day 200 was 92.6 and 92.3%, respectively. With a median follow-up of 47 months, the probability of EFS at 5 years was 57.2%. The 5-year cumulative incidence of TRM and relapse was 3.7 and 27.4%, respectively. These results suggest that unrelated CBT after myeloablative conditioning could be safely and effectively used for adult patients with ALL.
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Affiliation(s)
- J Ooi
- Department of Hematology and Oncology, Institute of Medical Science, University of Tokyo, Tokyo, Japan.
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Affiliation(s)
- Imari Mimura
- Division of Nephrology and Endocrinology, Department of Internal Medicine, University of Tokyo, Tokyo, Japan
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Tojo A, Onozato ML, Kitiyakara C, Kinugasa S, Fukuda S, Sakai T, Fujita T. Glomerular albumin filtration through podocyte cell body in puromycin aminonucleoside nephrotic rat. Med Mol Morphol 2008; 41:92-8. [PMID: 18592163 DOI: 10.1007/s00795-008-0397-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [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: 01/08/2008] [Accepted: 02/26/2008] [Indexed: 11/27/2022]
Abstract
It is an a priori concept that protein molecules including albumin are filtrated through the slit membrane between the foot processes of podocytes. However, foot processes are effaced and the number of slit membranes is reduced in nephrotic syndrome, suggesting another pathway of albumin filtration through the foot process cell body. Thus, we investigated the pathway of gold-and fluorescein isothiocyanate (FITC)-labeled albumin filtration in the puromycin aminonucleoside (PAN) model of nephrotic syndrome in the rat. PAN rats at day 7 with established nephrotic proteinuria were injected with 8-nm gold-labeled albumin and FITC-labeled albumin through the jugular vein followed by kidney fixation at 10 or 30 min. Goldlabeled albumin was accumulated in the paramesangial area and in the endosomes of glomerular endothelial cells of both control and PAN rats by electron microscopy. On the other hand, FITC-labeled albumin was detected between foot processes in the control but more in the podocyte cell body in the PAN rat. In conclusion, albumin will be filtrated through the decreased numbers of slit diaphragms; however, albumin can be also taken up in the podocyte, the mesangium, and the glomerular endothelium, suggesting that there might be other routes of glomerular albumin clearance in nephrotic syndrome.
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Affiliation(s)
- Akihiro Tojo
- Division of Nephrology and Endocrinology, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan.
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Tomonari A, Takahashi S, Ooi J, Tsukada N, Konuma T, Kato S, Kasahara S, Iseki T, Tojo A, Asano S. No occurrence of Pneumocystis jiroveci (carinii) pneumonia in 120 adults undergoing myeloablative unrelated cord blood transplantation. Transpl Infect Dis 2008; 10:303-7. [PMID: 18564982 DOI: 10.1111/j.1399-3062.2008.00321.x] [Citation(s) in RCA: 12] [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: 11/29/2022]
Abstract
The incidence of pneumonia caused by Pneumocystis carinii (PCP) (organism now renamed Pneumocystis jiroveci) during the early period after cord blood transplantation (CBT) was studied in 120 adults. Initially 89 patients (74%) received oral administration of 2 single-strength trimethoprim-sulfamethoxazole (TMP-SMZ) tablets twice daily from day -21. In 45 of 89 patients (51%), TMP-SMZ administration for a scheduled duration was completed. In the remaining 44 patients (49%), however, TMP-SMZ administration was discontinued prior to day -3 because of toxicity. Among these patients, 42 subsequently received aerosolized pentamidine (AP) on a median of day -13 (range, -20 to -6). Thirty-one patients (26%) received AP without TMP-SMZ administration on a median of day -14 (range, -21 to -9). None of the 120 patients were diagnosed with PCP within 100 days or 2 years after CBT; however, one patient who received AP before CBT but no prophylaxis after CBT developed cerebral toxoplasmosis on day +91. Pre-transplant prophylaxis against PCP did not significantly affect transplantation-related mortality or disease-free survival at 2 years after CBT. The results suggest that PCP during the early period after CBT can be effectively prevented by any pre-transplant prophylactic method.
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Affiliation(s)
- A Tomonari
- Department of Hematology/Oncology, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan.
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Futami M, Hatano T, Soda Y, Kobayashi S, Miyagishi M, Tojo A. RNAi-mediated silencing of p190Bcr-Abl inactivates Stat5 and cooperates with imatinib mesylate and 17-allylamino-17-demetoxygeldanamycin in selective killing of p190Bcr-Abl-expressing leukemia cells. Leukemia 2008; 22:1131-8. [DOI: 10.1038/leu.2008.60] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Tomonari A, Takahashi S, Ooi J, Tsukada N, Konuma T, Kato S, Kasahara S, Iseki T, Tojo A, Asano S. Blood eosinophilia after unrelated cord blood transplantation for adults. Bone Marrow Transplant 2008; 42:63-5. [DOI: 10.1038/bmt.2008.78] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Tsukada N, Ishige M, Konuma T, Kato S, Kasahara S, Tomonari A, Ooi J, Tojo A, Watanabe N, Nakauchi H, Masuko M, Furukawa T, Aizawa Y, Takahashi S. 361: The Pharmacodynamic Analysis between Cyclosporine a (CsA) and Cytokine Profiles of CD4+ T Lymphocytes for the Development of Optimized Immunosuppressive Therapy with CsA after Unrelated Cord Blood Transplantation (CBT). Biol Blood Marrow Transplant 2008. [DOI: 10.1016/j.bbmt.2007.12.371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Kido M, Ando K, Onozato ML, Tojo A, Yoshikawa M, Ogita T, Fujita T. Protective Effect of Dietary Potassium Against Vascular Injury in Salt-Sensitive Hypertension. Hypertension 2008; 51:225-31. [DOI: 10.1161/hypertensionaha.107.098251] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Makiko Kido
- From the Department of Nephrology and Endocrinology, University of Tokyo Graduate School of Medicine, Tokyo, Japan
| | - Katsuyuki Ando
- From the Department of Nephrology and Endocrinology, University of Tokyo Graduate School of Medicine, Tokyo, Japan
| | - Maristela L. Onozato
- From the Department of Nephrology and Endocrinology, University of Tokyo Graduate School of Medicine, Tokyo, Japan
| | - Akihiro Tojo
- From the Department of Nephrology and Endocrinology, University of Tokyo Graduate School of Medicine, Tokyo, Japan
| | - Masahiro Yoshikawa
- From the Department of Nephrology and Endocrinology, University of Tokyo Graduate School of Medicine, Tokyo, Japan
| | - Teruhiko Ogita
- From the Department of Nephrology and Endocrinology, University of Tokyo Graduate School of Medicine, Tokyo, Japan
| | - Toshiro Fujita
- From the Department of Nephrology and Endocrinology, University of Tokyo Graduate School of Medicine, Tokyo, Japan
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Ooi J, Takahashi S, Tomonari A, Tsukada N, Konuma T, Kato S, Kasahara S, Tojo A, Asano S. 14: Unrelated Cord Blood Transplantation After Myeloablative Conditioning in 98 Adult Patients with Acute Leukemia: A Single-Institute Experience in Japan. Biol Blood Marrow Transplant 2008. [DOI: 10.1016/j.bbmt.2007.12.022] [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: 11/24/2022]
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