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Yoshihara S, Yaegashi T, Naito M, Kutsukake Y, Kamiya M. Left ventricular aneurysm with massive myocardial calcification. Neth Heart J 2012; 20:476-7. [DOI: 10.1007/s12471-011-0144-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Fujikura J, Nakao K, Sone M, Noguchi M, Mori E, Naito M, Taura D, Harada-Shiba M, Kishimoto I, Watanabe A, Asaka I, Hosoda K, Nakao K. Induced pluripotent stem cells generated from diabetic patients with mitochondrial DNA A3243G mutation. Diabetologia 2012; 55:1689-98. [PMID: 22396012 DOI: 10.1007/s00125-012-2508-2] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2011] [Accepted: 01/30/2012] [Indexed: 01/15/2023]
Abstract
AIMS/HYPOTHESIS The aim of this study was to generate induced pluripotent stem (iPS) cells from patients with mitochondrial DNA (mtDNA) mutation. METHODS Skin biopsies were obtained from two diabetic patients with mtDNA A3243G mutation. The fibroblasts thus obtained were infected with retroviruses encoding OCT4 (also known as POU5F1), SOX2, c-MYC (also known as MYC) and KLF4. The stem cell characteristics were investigated and the mtDNA mutation frequencies evaluated by Invader assay. RESULTS From the two diabetic patients we isolated four and ten putative mitochondrial disease-specific iPS (Mt-iPS) clones, respectively. Mt-iPS cells were cytogenetically normal and positive for alkaline phosphatase activity, with the pluripotent stem cell markers being detectable by immunocytochemistry. The cytosine guanine dinucleotide islands in the promoter regions of OCT4 and NANOG were highly unmethylated, indicating epigenetic reprogramming to pluripotency. Mt-iPS clones were able to differentiate into derivatives of all three germ layers in vitro and in vivo. The Mt-iPS cells exhibited a bimodal degree of mutation heteroplasmy. The mutation frequencies decreased to an undetectable level in six of 14 clones, while the others showed several-fold increases in mutation frequencies (51-87%) compared with those in the original fibroblasts (18-24%). During serial cell culture passage and after differentiation, no recurrence of the mutation or no significant changes in the levels of heteroplasmy were seen. CONCLUSIONS/INTERPRETATION iPS cells were successfully generated from patients with the mtDNA A3243G mutation. Mutation-rich, stable Mt-iPS cells may be a suitable source of cells for human mitochondrial disease modelling in vitro. Mutation-free iPS cells could provide an unlimited, disease-free supply of cells for autologous transplantation therapy.
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Kuerban M, Naito M, Hirai S, Terayama H, Qu N, Musha M, Ikeda A, Koji T, Itoh M. Involvement of Fas/Fas-L and Bax/Bcl-2 Systems in Germ Cell Death Following Immunization With Syngeneic Testicular Germ Cells in Mice. ACTA ACUST UNITED AC 2012; 33:824-31. [DOI: 10.2164/jandrol.111.015529] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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54
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Sugimoto K, Iegami CM, Iida S, Naito M, Tamaki R, Minagi S. New image analysis of large food particles can discriminate experimentally suppressed mastication. J Oral Rehabil 2012; 39:405-10. [PMID: 22372665 DOI: 10.1111/j.1365-2842.2012.02288.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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55
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Kaedei Y, Naito M, Naoi H, Sato Y, Taniguchi M, Tanihara F, Kikuchi K, Nagai T, Otoi T. Effects of (−)-Epigallocatechin Gallate on the Motility and Penetrability of Frozen-Thawed Boar Spermatozoa Incubated in the Fertilization Medium. Reprod Domest Anim 2012; 47:880-6. [DOI: 10.1111/j.1439-0531.2012.01984.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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56
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Hewson I, Brown JM, Burge CA, Couch CS, LaBarre BA, Mouchka ME, Naito M, Harvell CD. Description of viral assemblages associated with the Gorgonia ventalina holobiont. CORAL REEFS (ONLINE) 2012; 31:487-491. [PMID: 32214633 PMCID: PMC7087884 DOI: 10.1007/s00338-011-0864-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2011] [Accepted: 12/15/2011] [Indexed: 04/28/2023]
Abstract
The diversity and function of viruses in coral holobionts has only recently received attention. The non-reef building gorgonian octocoral, Gorgonia ventalina, is a major constituent of Caribbean reefs. We investigated viral communities associated with G. ventalina tissues to understand their role in gorgonian ecology. Pyrosequencing was used to prepare a total of 514,632 sequence reads of DNA- and RNA-based mixed-community viral genomes (metaviromes). RNA viral assemblages were comprised of primarily unidentifiable reads, with most matching host transcripts and other RNA metaviromes. DNA metaviromes were similar between healthy and diseased tissues and comprised of contiguous sequences (contigs) that matched primarily metazoan and bacterial proteins. Only ~5% of contigs matched viral proteins that were primarily cyanophage and viruses of Chlorella and Ostreococcus. Our results confirm that DNA and RNA viruses comprise a component of the gorgonian holobiont, suggesting that they may play a role in the ecology of G. ventalina.
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Hirai S, Naito M, Terayama H, Qu N, Kuerban M, Musha M, Ikeda A, Miura M, Itoh M. The Origin of Lymphatic Capillaries in Murine Testes. ACTA ACUST UNITED AC 2011; 33:745-51. [DOI: 10.2164/jandrol.111.015156] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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58
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Ito M, Sato A, Yamaki R, Naito M, Kobayashi K, Nagao T, Suzuki K, Sakurai H, Maruyama H, Itou M, Sakurai Y. X-ray magnetic diffraction and magnetic Compton scattering of Pd-Co and Pt-Fe. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311086570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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59
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Naito M, Asai Y, Mori A, Kuwabara M, Okamoto A, Katase S, Hishida A, Morita E, Kawai S, Okada R, Wakai K, Hamajima N. P2-212 Association between the RANK polymorphism and the number of teeth among Japanese. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976j.45] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Farooq M, Ito M, Naito M, Shimomura Y. A case of monilethrix caused by novel compound heterozygous mutations in the desmoglein 4 (DSG4) gene. Br J Dermatol 2011; 165:425-31. [DOI: 10.1111/j.1365-2133.2011.10373.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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61
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Zheng B, Uenuma M, Iwahori K, Okamoto N, Naito M, Ishikawa Y, Uraoka Y, Yamashita I. Sterically controlled docking of gold nanoparticles on ferritin surface by DNA hybridization. NANOTECHNOLOGY 2011; 22:275312. [PMID: 21613737 DOI: 10.1088/0957-4484/22/27/275312] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Novel assemblies of DNA-functionalized gold nanoparticles (DNA-GNPs) have received considerable interest due to their fascinating properties which are desired for various detection applications. In this study, we present innovative GNP assemblies which have a cage-shaped protein ferritin in the center, and discrete GNPs sterically surrounding the central ferritin. These assemblies were constructed by hybridizing DNA-GNP to chemically DNA-modified ferritin, which has a hollow cavity or an iron NP core. Subsequent gel electrophoresis purification and transmission electron microscopy observation showed that ferritin/DNA/GNP assemblies were successfully constructed and can be isolated as independent functional units, which can be used to investigate not only the interaction between the GNPs of complicated GNP clusters but also the interaction between the GNPs and the internalized NP.
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Takagi T, Onishi M, Urawa M, Naito M, Fujiwara A, Kobayashi T, Kobayashi H, Toda M, Boveda D, Gil-Bernabe P. Protective Effect of Thrombomodulin in a Murine Model of Allergen-Induced Asthma. J Allergy Clin Immunol 2011. [DOI: 10.1016/j.jaci.2010.12.266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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63
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Ikezawa K, Naito M, Yumiba T, Iwahashi K, Onishi Y, Kita H, Nishio A, Kanno T, Matsuura T, Ono A, Chiba M, Mizuno T, Aketa H, Maeda K, Michida T, Katayama K. Splenectomy and antiviral treatment for thrombocytopenic patients with chronic hepatitis C virus infection. J Viral Hepat 2010; 17:488-92. [PMID: 19840366 DOI: 10.1111/j.1365-2893.2009.01211.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Thrombocytopenic patients with chronic hepatitis C virus (HCV) infection are poor candidates for antiviral treatment with interferon (IFN), but no standard treatment for thrombocytopenia has yet been established. We evaluated the safety of splenectomy and its efficacy for the initiation and continuation of antiviral therapy. From March 2003 to April 2006, 10 patients (mean age 62.5 years) with HCV-related cirrhosis, low platelet count (<==106 000/mm(3)) and splenomegaly (spleen size >==10 cm) underwent splenectomy. Platelet counts significantly increased at 4-8 weeks after splenectomy [pre: 64 200 +/- 6900/mm(3)vs post 209 000 +/- 40 600/mm(3) (P = 0.004)]. No severe operative complications were observed. All patients subsequently received antiviral therapy. Of the eight patients who were infected with HCV genotype 1 and had a high viral load (>==100 KIU/mL), four received combination therapy with pegylated IFNalpha-2b plus ribavirin, and the other four received standard IFNalpha-2b plus ribavirin. One patient infected with HCV genotype 2 and another with HCV genotype 1 and a low viral load (<100 KIU/mL) were treated with pegylated IFNalpha-2a. Six patients achieved sustained virologic response (SVR). Among four patients who failed to achieve SVR, one was given retreatment with pegylated IFN plus ribavirin, and the other three received low-dose long-term IFN therapy. Although this study was small, the treatment results were similar to those for patients without thrombocytopenia and suggested that splenectomy would not reduce the antiviral efficacy of IFNalpha-based treatment.
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Miyaso H, Komiyama M, Matsuno Y, Naito M, Hirai S, Itoh M, Mori C. The Changes of Cortactin p80/85 Isoform Profiles and Tyrosine Phosphorylation Status During Spermatogenesis in the Mouse Testis. ACTA ACUST UNITED AC 2010; 31:507-18. [DOI: 10.2164/jandrol.109.009274] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Hayashi K, Fotovati A, Abu Ali S, Nakamura Y, Inagaki M, Naito M. Effect of a prostaglandin EP4 receptor agonist on early fixation of hydroxyapatite/titanium composite- and titanium-coated rough-surfaced implants in ovariectomized rats. J Biomed Mater Res A 2010; 92:1202-9. [PMID: 19322876 DOI: 10.1002/jbm.a.32444] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The agonist of the prostaglandin EP4 receptor can increase bone density in osteoporosis. Using ovariectomized (OVX) and sham-operated (SO) rats, the effects of the EP4 receptor agonist, ONO-4819, and hydroxyapatite (HA) on implant-bone fixation in implants with a rough surface were investigated. Female Wistar rats (12 weeks old) were divided into either SO or bilateral OVX groups. Twenty four weeks later, either hydroxyapatite/titanium (HA/Ti) composite-coated or Ti-coated implants were implanted into the femora, and the animals were treated with either ONO-4819 or saline for 4 weeks. The fixation strength of the HA/Ti-coated implants was higher than that of the Ti-coated implants in the saline-treated OVX rats. In the OVX rats, ONO-4819 enhanced fixation of the rough Ti-coated implants to levels similar to that of HA/Ti-coated implants. These data suggest that a combination of treatment with an EP4 receptor agonist and a rough-surfaced implant might be useful in increasing the early fixation of cement-less arthroplasty, particularly in elderly patients with osteoporosis.
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Mizusaki S, Naito M, Taniguchi T, Nagata Y, Itou M, Sakurai Y, Noro Y, Ozawa TC, Samata H. Variation of the Ru moment in the Ca(0.3)Sr(0.7)Ru(1-x)Mn(x)O3 system. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2010; 22:145601. [PMID: 21389533 DOI: 10.1088/0953-8984/22/14/145601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The variation of the magnetic moment on Ru and Mn atoms in the Ca(0.3)Sr(0.7)Ru(1-x)Mn(x)O(3) system was investigated by the magnetic Compton scattering technique using synchrotron radiation. The Ca(0.3)Sr(0.7)Ru(1-x)Mn(x)O(3) system has ferrimagnetism with an antiferromagnetic coupling between Ru and Mn, and the dominant magnetic component changes from ferromagnetic Ru to ferromagnetic Mn at x ∼0.25 as the Mn substitution proceeds. The mechanism for the change in the magnetism of Ca(0.3)Sr(0.7)Ru(1-x)Mn(x)O(3) is discussed.
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Matsuo H, Okamura J, Chen J, Takanaga H, Ohtani H, Kaneda Y, Naito M, Tsuruo T, Sawada Y. Efficient introduction of macromolecules and oligonucleotides into brain capillary endothelial cells using HVJ-liposomes. J Drug Target 2010. [DOI: 10.3109/10611860108995635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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69
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Ozawa H, Kokuba Y, Nakamura T, Naito M, Sato T, Hatate K, Onozato W, Miura H, Tsutsui A, Ikeda A, Ihara A, Watanabe M. Minimally invasive straight laparoscopic total proctocolectomy for ulcerative colitis. Asian J Endosc Surg 2010. [DOI: 10.1111/j.1758-5910.2009.00026.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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70
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Tajima A, Naito M, Yasuda Y, Kuwana T. Production of germ line chimera by transfer of primordial germ cells in the domestic chicken (Gallus domesticus). Theriogenology 2009; 40:509-19. [PMID: 16727334 DOI: 10.1016/0093-691x(93)90404-s] [Citation(s) in RCA: 142] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/1992] [Accepted: 05/28/1993] [Indexed: 11/23/2022]
Abstract
Blood was collected from Stage 13 to 14 (1) chick embryos. Primordial germ cells (PGCs) were separated from blood cells by Ficoll density gradient centrifugation. One hundred Rhode Island Red PGCs per embryo were transferred to the blood stream of Stage 14 to 15 White Leghorn embryos. Also, one hundred White Leghorn PGCs per embryo were transferred to the blood stream of Stage 14 to 15 Rhode Island Red embryos. Hatched male and female chicks were raised until sexual maturity, and progeny tests were performed by mating these PGC recipients with Rhode Island Red chickens of the opposite sex. Chicks apparently derived from the transferred PGCs, based on the feather color of the chicks, were produced from all 4 possible mating combinations. The present results indicate that the germ line of PGC recipient chickens consists of 2 distinct populations of germ cells.
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Hanioka T, Ojima M, Tanaka H, Naito M, Hamajima N, Matsuse R. Intensive Smoking-cessation Intervention in the Dental Setting. J Dent Res 2009; 89:66-70. [DOI: 10.1177/0022034509350867] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Smoking exerts detrimental effects on dental treatment and oral health. Our goal was to evaluate effectiveness in terms of the abstinence rate in smoking-cessation intervention delivered by dental professionals. Individuals who were willing to quit smoking were randomly assigned to either an intervention or a non-intervention group. Intensive intervention was provided, consisting of 5 counseling sessions, including an additional nicotine replacement regimen. Reported abstinence was verified by the salivary cotinine level. Thirty-three persons in the intervention and 23 in the non-intervention group started the trial. On an intent-to-treat basis, 3-, 6- and 12-month continuous abstinence rates in the intervention group were 51.5%, 39.4%, and 36.4%, respectively, while the rates in the non-intervention group were consistent at 13.0%. Adjusted odds ratios (95% confidence interval) by logistic stepwise regression analyses were 7.1 (1.8, 28.5), 8.9 (1.7, 47.2), and 6.4 (1.3, 30.7), respectively. Intensive smoking-cessation intervention in the dental setting was therefore effective.
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Maeyama A, Naito M, Moriyama S, Yoshimura I. Periacetabular osteotomy reduces the dynamic instability of dysplastic hips. ACTA ACUST UNITED AC 2009; 91:1438-42. [PMID: 19880886 DOI: 10.1302/0301-620x.91b11.21796] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
We compared the dynamic instability of 25 dysplastic hips in 25 patients using triaxial accelerometry before and one year after periacetabular osteotomy. We also evaluated the hips clinically using the Harris hip score and assessed acetabular orientation by radiography before surgery and after one year. The mean overall magnitude of acceleration was significantly reduced from 2.30 m/s(2) (sd 0.57) before operation to 1.55 m/s(2) (sd 0.31) afterwards. The mean Harris hip score improved from 78.08 (47 to 96) to 95.36 points (88 to 100). The radiographic parameters all showed significant improvements. This study suggests that periacetabular osteotomy provides pain relief, improves acetabular cover and reduces the dynamic instability in patients with dysplastic hips.
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Takagi T, Taguchi O, Aoki S, Toda M, Yamaguchi A, Fujimoto H, Boveda-Ruiz D, Gil-Bernabe P, Ramirez AY, Naito M, Yano Y, D'Alessandro-Gabazza CN, Fujiwara A, Takei Y, Morser J, Gabazza EC. Direct effects of protein S in ameliorating acute lung injury. J Thromb Haemost 2009; 7:2053-63. [PMID: 19817989 DOI: 10.1111/j.1538-7836.2009.03642.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
OBJECTIVE Protein S may exert an anticoagulant activity by enhancing the anticoagulant activity of activated protein C and/or by directly inhibiting the prothrombinase complex. Protein S itself may also directly regulate inflammatory responses and apoptosis. The role of protein S in acute lung injury (ALI) was unknown. This study evaluated the effect of protein S on ALI in the mouse. METHODS Animal ALI was induced in C57/BL6 mice by intratracheal instillation of lipopolysaccharide (LPS). Mice were treated with protein S or saline by intraperitoneal injection 1 h before LPS instillation. RESULTS Activated protein or protein S alone and combined activated protein C + protein S therapy decreased inflammatory markers and cytokines in mice with acute lung injury. In LPS-treated mice compared with controls ALI was induced as shown by significantly increased levels of total protein, tumor necrosis factor-alpha, interleukin-6 and monocyte chemoattractant protein-1 in the bronchoalveolar lavage fluid. Mice with ALI treated with protein S had significantly decreased concentrations of tumor necrosis factor-alpha and interleukin-6 in the lung compared with untreated animals. Thrombin-antithrombin III, a marker of the activity of the coagulation cascade, was unchanged. Protein S inhibited the expression of cytokines in vitro and increased activation of the Axl tyrosine kinase pathway in A549 epithelial cells. CONCLUSION Protein S protects against LPS-induced ALI, possibly by directly inhibiting the local expression of inflammatory cytokines without affecting coagulation.
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Naito M, Ishimaru M. Formation process of beta-FeSi from amorphous Fe-Si synthesized by ion implantation: Fe concentration dependence. J Microsc 2009; 236:123-7. [PMID: 19903237 DOI: 10.1111/j.1365-2818.2009.03270.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Formation processes of beta-FeSi(2) from amorphous Fe-Si layers have been investigated using transmission electron microscopy (TEM). Si(111) substrates were irradiated with 120 keV Fe ions at -150 degrees C to fluences of 1.0 x 10(17) and 4.0 x 10(17) cm(-2). An amorphous Fe-Si layer embedded in an amorphous Si was formed in the low-fluence sample, whereas an amorphous Fe-Si surface layer on an amorphous Si was obtained in the high-fluence one. The amorphous Fe-Si layers were crystallized to beta-FeSi(2) after thermal annealing at 800 degrees C for 2 h. Cross-sectional and plan-view TEM observations revealed that, prior to the formation of beta-FeSi(2), the amorphous Fe-Si layers crystallized to alpha-FeSi(2) in the low-fluence sample and to epsilon-FeSi in the high-fluence one. The absence of metastable gamma-FeSi(2) which is considered as a precursor of epitaxially grown beta-FeSi(2) on Si was attributed to the instability of gamma-phase in an amorphous matrix.
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Shitama T, Kiyama T, Naito M, Shiramizu K, Huang G. Which is more invasive-mini versus standard incisions in total hip arthroplasty? INTERNATIONAL ORTHOPAEDICS 2009; 33:1543-7. [PMID: 19148642 DOI: 10.1007/s00264-008-0708-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2008] [Revised: 11/03/2008] [Accepted: 11/04/2008] [Indexed: 10/21/2022]
Abstract
In this study, interleukin-6 (IL-6), C-reactive protein (CRP), and haemoglobin levels were evaluated to compare the degree of surgical invasion between mini and standard incisions in total hip arthroplasty (THA). Sixty-two patients admitted for primary cementless THA were enrolled in this randomised study. The patients were allocated to have surgery through either a mini incision of <10 cm or a standard incision of 15 cm. In each group, inflammatory responses were evaluated by IL-6, CRP, and haemoglobin levels before operation and one day after operation. Significant differences were not found in IL-6, CRP, and haemoglobin levels between both groups. At six months after surgery, there were no significant differences in postoperative Harris hip scores or radiographic evaluations between both groups. In conclusion, a 5.0 cm difference in the skin incision to the hip joint seemed to have no influence on the degree of surgical invasion during THA.
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Naito M, Nakajima K, Iwa N, Ono K, Yoshida I, Konobe T, Ikuta K, Ueda S, Kato S, Hirai K. Demonstration of a Marek's disease virus-specific antigen in tumour lesions of chickens with Marek's disease using monoclonal antibody against a virus phosphorylated protein. Avian Pathol 2008; 15:503-10. [PMID: 18766550 DOI: 10.1080/03079458608436311] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
By use of monoclonal antibody against a Marek's disease virus (MDV) serotype 1-specific phosphorylated protein, MDV antigen-positive cells were demonstrated in tumour lesions of various visceral organs of chickens with Marek's disease. However, these tumour lesions did not appear to have the MDV glycoproteins gA and gB, which are considered to be late gene products of the virus genome gA and gB as well as the phosphorylated protein were detected in the feather follicle epithelium, which is a permissive site for MDV replication.
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Minematsu T, Harumi T, Naito M. Quantitative genotyping by amplifying the polymorphic sequences ofPre-Melanosomal Protein(PMEL17) gene using real-time polymerase chain reaction in chickens. Br Poult Sci 2008; 49:542-9. [DOI: 10.1080/00071660802298310] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Naito M, Matsumoto O, Utsuki A, Tsukada A, Yamamoto H, Manabe T. Undoped cuprate superconductors — band superconductors or oxygen-doped Mott-Hubbard superconductors? ACTA ACUST UNITED AC 2008. [DOI: 10.1088/1742-6596/108/1/012037] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Savchenko AS, Imamura M, Ohashi R, Jiang S, Kawasaki T, Hasegawa G, Emura I, Iwanari H, Sagara M, Tanaka T, Hamakubo T, Kodama T, Naito M. Expression of pentraxin 3 (PTX3) in human atherosclerotic lesions. J Pathol 2008; 215:48-55. [DOI: 10.1002/path.2314] [Citation(s) in RCA: 152] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Naito M, Komohara Y, Ishihara Y, Noguchi M, Yamashita Y, Shirakusa T, Yamada A, Itoh K, Harada M. Identification of Lck-derived peptides applicable to anti-cancer vaccine for patients with human leukocyte antigen-A3 supertype alleles. Br J Cancer 2007; 97:1648-54. [PMID: 18043580 PMCID: PMC2360277 DOI: 10.1038/sj.bjc.6604071] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The identification of peptide vaccine candidates to date has been focused on human leukocyte antigen (HLA)-A2 and -A24 alleles. In this study, we attempted to identify cytotoxic T lymphocyte (CTL)-directed Lck-derived peptides applicable to HLA-A11+, -A31+, or -A33+ cancer patients, because these HLA-A alleles share binding motifs, designated HLA-A3 supertype alleles, and because the Lck is preferentially expressed in metastatic cancer. Twenty-one Lck-derived peptides were prepared based on the binding motif to the HLA-A3 supertype alleles. They were first screened for their recognisability by immunoglobulin G (IgG) in the plasma of prostate cancer patients, and the selected candidates were subsequently tested for their potential to induce peptide-specific CTLs from peripheral blood mononuclear cells of HLA-A3 supertype+ cancer patients. As a result, four Lck peptides were frequently recognised by IgGs, and three of them – Lck90−99, Lck449−458, and Lck450−458 – efficiently induced peptide-specific and cancer-reactive CTLs. Their cytotoxicity towards cancer cells was mainly ascribed to HLA class I-restricted and peptide-specific CD8+ T cells. These results indicate that these three Lck peptides are applicable to HLA-A3 supertype+ cancer patients, especially those with metastasis. This information could facilitate the development of peptide-based anti-cancer vaccine for patients with alleles other than HLA-A2 and -A24.
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Nakamura Y, Qu N, Terayama H, Naito M, Yi SQ, Moriyama H, Itoh M. Structure of thymic cysts in congenital lymph nodes-lacking mice. Anat Histol Embryol 2007; 37:126-30. [PMID: 17986312 DOI: 10.1111/j.1439-0264.2007.00806.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The ALY (aly/aly) mouse, a mutant of the C57BL/6j strain, has a severe immunodeficiency because of immature development of the immune organs. Both lymph nodes and Peyer's patches are lacking and both the thymus and spleen are small. Previous microscopical observation of their thymus glands revealed the presence of an indistinct border between the cortex and medulla, the absence of Hassal's corpuscles and the reduction of the medullary epithelial cell population. However, other microscopical findings for these glands have not yet been reported. In the present study, we performed light and electron microscopical observation of the thymus and found the consistent presence of extremely irregular shaped cystic cavities lined by microvilli-bearing epithelium in the medulla. The cysts comprised ceca and did not open into adjacent capillaries, although they contained some lymphocytes and macrophages in their lumens. In the thymus glands of normal C57BL/6j mice, only some small cysts oval in shape could be inconspicuously found in the medulla. Therefore, the thymic cysts may normally regress during thymic development, however, in ALY mice, the cysts may remain because of the organ immaturity.
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Dote H, Hato S, Koshimune R, Ino H, Naito M, Date H. 374 POSTER Synergic antiproliferative effect of Hsp90 inhibitor in combination with cisplatin in gastric carcinoma cell lines. EJC Suppl 2007. [DOI: 10.1016/s1359-6349(07)70392-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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83
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Hato S, Dote H, Koshimune R, Ino H, Naito M, Date H. 385 POSTER Hsp90 inhibitor synergistically potentiates the growth inhibitory and pro-apoptotic effects of SN-38 in gastric carcinoma cells. EJC Suppl 2007. [DOI: 10.1016/s1359-6349(07)70403-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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84
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Fujikawa K, Nakaseko C, Cho R, Abe D, Oda K, Tanaka H, Ohwada C, Ozawa S, Takeuchi M, Sakaida E, Shimizu N, Naito M, Nishimura M, Saito Y. Molecular remission of multiple myeloma with cytoreductive autografting followed by a dose-reduced allograft. Bone Marrow Transplant 2007; 40:997-9. [PMID: 17724437 DOI: 10.1038/sj.bmt.1705843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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85
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Wako K, Kawasaki T, Yamana K, Suzuki K, Jiang S, Umezu H, Nishiyama T, Takahashi K, Hamakubo T, Kodama T, Naito M. Expression of androgen receptor through androgen-converting enzymes is associated with biological aggressiveness in prostate cancer. J Clin Pathol 2007; 61:448-54. [PMID: 17720776 DOI: 10.1136/jcp.2007.050906] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Aims:The association between the expression of androgen receptor (AR) or androgen-converting enzymes and malignant potential in prostate cancer (PCa) was examined.Methods:PCa specimens from 44 cases of stage II, 10 cases of stage III, four cases of stage IV and two recurrent cases were semi-quantitatively studied with immunohistochemistry for AR and androgen-converting enzymes.Results:The expression scores for AR, 5α-reductase type 1 (SRD5A1), 5α-reductase type 2 (SRD5A2), and aldo-keto reductase family 1 member C3 (AKR1C3) in the metastatic lesion of stage IV or recurrent cancer (n = 6) were 284.2 (30.1), 300 (0.0), 279.2 (51) and 254.2 (74.9), respectively; these scores were significantly higher than the respective scores of 121.8 (82.1), 135.1 (59.7), 167.0 (66.4) and 150.5 (62.8) for stage II and III cancer (n = 54) (p<0.001, p<0.001, p = 0.002 and p = 0.018, respectively). The expression scores for AR and SRD5A1 in stage II and III cancer with Gleason score 7 (n = 19) were 128.7 (72.3) and 150.5 (52.9); these were significantly higher than the scores of 78.8 (67.2) and 100.0 (39.6), respectively, for cancers with a Gleason score of ⩽6 (n = 20) (p = 0.032 and p = 0.002, respectively). The expression scores for AR, SRD5A1 and AKR1C3 in stage II and III cancer with primary Gleason pattern ⩾4 (n = 21) were 158.1 (84.3), 158.3 (61.1) and 173.8 (64.8); these were significantly higher than the scores of 98.6 (72.8), 120.3 (54.7) and 135.6 (57.6), respectively, for cancers with primary Gleason pattern ⩽3 (n = 33) (p = 0.011, p = 0.026 and p = 0.034, respectively). Within Gleason score 9 cancer, the expression scores for AR and SRD5A1 in the primary lesion of stage IV (n = 3) were 276.7 (5.8) and 283.3 (28.9); these scores were significantly higher than the scores of 182.1 (86.0) and 140.0 (56.6), respectively, for stage II and III cancer (n = 7) (p = 0.027 and p = 0.001, respectively).Conclusions:Both AR and androgen-converting enzymes were upregulated in high-grade or advanced PCa.
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86
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Wakai K, Kurozawa Y, Shibata A, Fujita Y, Kotani K, Ogimoto I, Naito M, Nishio K, Suzuki H, Yoshimura T, Tamakoshi A. Liver cancer risk, coffee, and hepatitis C virus infection: a nested case-control study in Japan. Br J Cancer 2007; 97:426-8. [PMID: 17637681 PMCID: PMC2360330 DOI: 10.1038/sj.bjc.6603891] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
We examined hepatocellular carcinoma mortality in relation to coffee consumption and anti-hepatitis C virus (HCV) antibody seropositivity in a nested case–control study involving 96 cases. The multivariate-adjusted odds ratios (95% confidence interval) for daily coffee drinkers vs non-drinkers were 0.49 (0.25–0.96), 0.31 (0.11–0.85), and 0.75 (0.29–1.92) in all cases, in HCV-positive and in HCV-negative individuals, respectively.
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87
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Naito M, Harumi T, Minematsu T, Tajima A, Kuwana T. Effect of soft X-ray irradiation on the migratory ability of primordial germ cells in chickens. Br Poult Sci 2007; 48:121-6. [PMID: 17453802 DOI: 10.1080/00071660701261294] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
1. The present study was conducted to elucidate the effect of soft X-ray irradiation on the migratory ability of primordial germ cells (PGCs) to the germinal ridges of chicken embryos. 2. PGCs (Barred Plymouth Rock, BPR) were isolated from embryonic blood and irradiated with soft X-rays for 1-10 min. Then, the PGCs were transfected in vitro with GFP gene by lipofection. The manipulated PGCs were transferred to recipient embryos (White Leghorn, WL) and migration to the germinal ridges was analysed by examining GFP gene expression in the gonads of recipient embryos under UV light at x40 magnifications. The expression of GFP gene was detected in all the gonads of recipient embryos examined up to 10.5 d of culture. 3. Migration of PGCs irradiated with soft X-rays to the germinal ridges was also confirmed by detecting a single nucleotide polymorphism in the D-loop region of the mitochondrial DNA of BPR and WL chickens. Freshly collected PGCs (BPR) were transferred to the bloodstream of recipient embryos (WL). The fate of the transferred donor PGCs was traced by detecting the single nucleotide polymorphism in the D-loop region of the mitochondrial DNA in BPR and WL used in this study. Transferred donor PGC-derived cells were detected in all the gonads of 17-d cultured embryos by PCR. 4. The results suggest that PGCs irradiated with soft X-rays still retain the ability to migrate to the germinal ridges of recipient embryos.
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Sumitomo Y, Naito M. Education and imaging. Gastrointestinal: ischemic colitis with thrombosis of the inferior mesenteric vein. J Gastroenterol Hepatol 2007; 22:134. [PMID: 17201895 DOI: 10.1111/j.1440-1746.2006.04814.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
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89
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Ushimaru T, Nakagawa T, Fujioka Y, Daicho K, Naito M, Yamauchi Y, Nonaka H, Amako K, Yamawaki K, Murata N. Transgenic Arabidopsis plants expressing the rice dehydroascorbate reductase gene are resistant to salt stress. JOURNAL OF PLANT PHYSIOLOGY 2006; 163:1179-84. [PMID: 17032619 DOI: 10.1016/j.jplph.2005.10.002] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2005] [Accepted: 10/14/2005] [Indexed: 05/12/2023]
Abstract
Vitamin C (l-ascorbate) is important for antioxidative and metabolic functions in both plants and humans. Ascorbate itself is oxidized to dehydroascorbate during the process of antioxidation, and dehydroascorbate reductase (DHAR, EC 1.8.5.1) re-reduces the oxidized ascorbate. Therefore, this enzyme is assumed to be critical for ascorbate recycling. Here we show that the expression of rice DHAR in transgenic Arabidopsis thaliana enhanced resistance to salt stress. Salt tolerance was remarkably improved despite slight increases in DHAR activity and total ascorbate. This study provides direct evidence for the importance of DHAR in salt tolerance.
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90
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Oyanagi H, Tsukada A, Naito M, Saini NL, Lampert MO, Gutknecht D, Dressler P, Ogawa S, Kasai K, Mohamed S, Fukano A. Fluorescence X-ray absorption spectroscopy using a Ge pixel array detector: application to high-temperature superconducting thin-film single crystals. JOURNAL OF SYNCHROTRON RADIATION 2006; 13:314-20. [PMID: 16799222 DOI: 10.1107/s0909049506015251] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2006] [Accepted: 04/26/2006] [Indexed: 05/10/2023]
Abstract
A Ge pixel array detector with 100 segments was applied to fluorescence X-ray absorption spectroscopy, probing the local structure of high-temperature superconducting thin-film single crystals (100 nm in thickness). Independent monitoring of pixel signals allows real-time inspection of artifacts owing to substrate diffractions. By optimizing the grazing-incidence angle theta and adjusting the azimuthal angle phi, smooth extended X-ray absorption fine structure (EXAFS) oscillations were obtained for strained (La,Sr)2CuO4 thin-film single crystals grown by molecular beam epitaxy. The results of EXAFS data analysis show that the local structure (CuO6 octahedron) in (La,Sr)2CuO4 thin films grown on LaSrAlO4 and SrTiO3 substrates is uniaxially distorted changing the tetragonality by approximately 5 x 10(-3) in accordance with the crystallographic lattice mismatch. It is demonstrated that the local structure of thin-film single crystals can be probed with high accuracy at low temperature without interference from substrates.
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91
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Tanaka T, Jiang S, Hotta H, Takano K, Iwanari H, Sumi K, Daigo K, Ohashi R, Sugai M, Ikegame C, Umezu H, Hirayama Y, Midorikawa Y, Hippo Y, Watanabe A, Uchiyama Y, Hasegawa G, Reid P, Aburatani H, Hamakubo T, Sakai J, Naito M, Kodama T. Dysregulated expression of P1 and P2 promoter-driven hepatocyte nuclear factor-4α in the pathogenesis of human cancer. J Pathol 2006; 208:662-72. [PMID: 16400631 DOI: 10.1002/path.1928] [Citation(s) in RCA: 137] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Hepatocyte nuclear factor-4alpha (HNF4alpha) exists in multiple isoforms that are generated by alternative promoter (P1 and P2) usage and splicing. Here we establish monoclonal antibodies (mAbs) for detecting P1 and P2 promoter-driven HNF4alpha, and evaluate their expression in normal adult human tissues and surgically resected carcinomas of different origins. Using immunohistochemical analysis, we demonstrate that, while P1 promoter-driven HNF4alpha is expressed in hepatocytes, small intestine, colon, kidney and epididymis, P2 promoter-driven HNF4alpha is expressed in bile duct, pancreas, stomach, small intestine, colon and epididymis. Altered expression patterns of P1 and P2 promoter-driven HNF4alpha were observed in gastric, hepatocellular and colorectal carcinomas. HNF4alpha was expressed in lung metastases from renal cell, hepatocellular and colorectal carcinoma but was not observed in lung tumours. The P1 and P2 promoter-driven HNF4alpha expression pattern of tumour metastases correlated with the primary site of origin. P1 promoter-driven HNF4alpha was also found in intestinal metaplasia of the stomach. These data provide evidence for the tissue distribution of P1 and P2 promoter-driven HNF4alpha at the protein level and suggest that HNF4alpha may be a novel diagnostic marker for metastases of unknown primary. We propose that the dysregulation of alternative promoter usage of HNF4alpha is associated with the pathogenesis of certain cancers.
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MESH Headings
- Animals
- Antibodies, Monoclonal/immunology
- Antibody Specificity
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/immunology
- Biomarkers, Tumor/metabolism
- Cell Transformation, Neoplastic/genetics
- Female
- Gene Expression Regulation, Neoplastic
- Hepatocyte Nuclear Factor 4/genetics
- Hepatocyte Nuclear Factor 4/immunology
- Hepatocyte Nuclear Factor 4/metabolism
- Humans
- Lung Neoplasms/metabolism
- Lung Neoplasms/secondary
- Male
- Neoplasm Proteins/genetics
- Neoplasm Proteins/immunology
- Neoplasm Proteins/metabolism
- Neoplasms/genetics
- Neoplasms/metabolism
- Precancerous Conditions/metabolism
- Promoter Regions, Genetic
- RNA, Messenger/genetics
- RNA, Neoplasm/genetics
- Reverse Transcriptase Polymerase Chain Reaction/methods
- Stomach Neoplasms/metabolism
- Tissue Distribution
- Tumor Cells, Cultured
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Yumura W, Suganuma S, Uchida K, Moriyama T, Otsubo S, Takei T, Naito M, Koike M, Nitta K, Nihei H. Effects of long-term treatment with mizoribine in patients with proliferative lupus nephritis. Clin Nephrol 2005; 64:28-34. [PMID: 16047642 DOI: 10.5414/cnp64028] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
AIM Mizoribine (MZR) is a purine antimetabolic immunosuppressant agent that has few little severe adverse events. We studied whether maintenance therapy with MZR and prednisolone (PSL) in severe proliferative lupus nephritis patients could improve immunity, reduce proteinuria, prevent renal relapse, and reduce steroid dose. METHOD Long-term maintenance therapy with MZR and PSL was evaluated in ten patients with biopsy-proven proliferative lupus nephritis. Patients with severe lupus nephritis, who had proteinuria of 0.5 g or more even after treatments with plasma exchange and/or pulse methyl prednisolone, were recruited. MZR at an average dose of 140 +/- 10 (100 - 200) mg was administered two to three times/day in combination with PSL. The average period for the MZR maintenance therapy was 89.7 +/- 5.5 (70 - 126) months. Urine protein excretion, serum hemolytic complement activity (CH50), C3, serum creatinine, general and biochemical blood examinations, anti-ds-DNA antibody were collected at each monthly medical examination. RESULTS All patients were females, mean age 43.0 +/- 3.3 years. A significant decrease in proteinuria was noted two years after the combination therapy (p = 0.0016). Five patients experienced lupus nephritis relapse. Patients who did not experience relapses had their MZR combination therapy initiated earlier (p = 0.037) when compared with the patients who experienced relapses. Serum creatinine levels remained unchanged in all patients throughout treatment and follow-up, even during renal relapses. Levels of C3 and CH50 normalized as proteinuria decreased. None of the patients developed serious side effects during MZR treatment. A significant steroid-sparing effect was observed three years after initiating MZR (p = 0.0025). CONCLUSION From our long-term observation, maintenance therapy with low-dose PSL combined with MZR can eliminate proteinuria and have steroid-sparing effect. Early initiation of the therapy can protect against renal relapses among severe proliferative lupus nephritis patients without serious side effects.
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93
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Hayashi K, Fotovati A, Ali SA, Oda K, Oida H, Naito M. Prostaglandin EP4 receptor agonist augments fixation of hydroxyapatite-coated implants in a rat model of osteoporosis. ACTA ACUST UNITED AC 2005; 87:1150-6. [PMID: 16049256 DOI: 10.1302/0301-620x.87b8.15886] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The reduced stability of hydroxyapatite (HA)-coated implants in osteopenic conditions is considered to be a major problem. We therefore developed a model of a boosted cementless implantation in osteopenic rats. Twelve-week-old rats were either ovariectomised (OVX) or sham-operated (SO), and after 24 weeks plain or HA-coated implants were inserted. They were treated with either a prostaglandin EP4 receptor agonist (ONO-4819) or saline for one month. The EP4 agonist considerably improved the osteoporosis in the OVX group. Ultrastructural analysis and mechanical testing showed an improvement in the implant-bone attachment in the HA-coated implants, which was further enhanced by the EP4 agonist. Although the stability of the HA-coated implants in the saline-treated OVX rats was less than in the SO normal rats, the administration of the EP4 agonist significantly compensated for this shortage. Our results showed that the osteogenic effect of the EP4 agonist augmented the osteoconductivity of HA and significantly improved the stability of the implant-bone attachment in the osteoporotic rat model.
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Nakashima S, Arai S, Mizuno Y, Yoshino K, Ando S, Nakamura Y, Sugawara K, Koike M, Saito E, Naito M, Nakao M, Ito H, Hamaoka K, Rai F, Asakura Y, Akamatu M, Fujimori K, Inao M, Imai Y, Ota S, Fujiwara K, Shiibashi M. A clinical study of Japanese patients with ulcer induced by low-dose aspirin and other non-steroidal anti-inflammatory drugs. Aliment Pharmacol Ther 2005; 21 Suppl 2:60-6. [PMID: 15943849 DOI: 10.1111/j.1365-2036.2005.02476.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
BACKGROUND The incidence and severity of non-steroidal anti-inflammatory drugs (NSAIDs)-induced gastro-duodenal ulcer have not been extensively studied in Japan. AIM We performed a prospective study to clarify NSAIDs-induced gastro-duodenal injury, focusing especially on low-dose aspirin (L-A). METHODS Two hundred and thirty-eight patients with bleeding peptic ulcers admitted to our hospital. History of taking NSAIDs and anti-ulcer drugs was obtained from all patients who underwent endoscopic examinations. The lesion scores of patients taking L-A were classified numerically from zero (no lesion) to five (ulcer). RESULTS The NSAIDs were associated with 28.2% of hemorrhagic ulcers. The rates of patients using L-A, loxoprofen, diclofenac, and combination of two of these drugs were 27, 16, 10 and 9%, respectively. Co-administered anti-ulcer drugs were cytoprotective anti-ulcer drugs (27%), H2 receptor antagonists (16%), PPI (4%), and none (53%). In patients taking L-A, H2 receptor antagonists were used most frequently. The HP was positive in 63% of L-A-induced ulcer cases and in 69% of NSAIDs other than low-dose aspirin-induced ulcer cases. The lesion scores of patients taking L-A with H2 receptor antagonists or PPI were significantly lower than those of patients who were taking only L-A (P < 0.05). CONCLUSIONS Approximately one-third of hospitalized patients with NSAIDs-induced hemorrhagic ulcer showed an association with L-A. Prospective randomized controlled trials including H2 receptor antagonists are required to establish preventive efforts aimed at L-A-induced gastro-duodenal injury.
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95
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Dote H, Toyooka S, Tsukuda K, Yano M, Ota T, Murakami M, Naito M, Toyota M, Gazdar AF, Shimizu N. Aberrant promoter methylation in human DAB2 interactive protein (hDAB2IP) gene in gastrointestinal tumour. Br J Cancer 2005; 92:1117-25. [PMID: 15770214 PMCID: PMC2361938 DOI: 10.1038/sj.bjc.6602458] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
The human DOC-2/DAB2 interactive protein (hDAB2IP) gene is a novel member of the Ras GTPase-activating family and has been demonstrated to be a tumour-suppressor gene inactivated by methylation in several cancers. In this study, we analysed the methylation and expression status of hDAB2IP in gastrointestinal tumours. The promoter region of hDAB2IP was divided into two regions (m2a and m2b) based on our previous report, and the methylation status was determined by bisulphite DNA sequencing in gastric cancer cell lines. The gene expression was semiquantified by real-time RT–PCR, and the results indicated that the m2b promoter region might be an authentic methylation-mediated key regulator of the gene expression. Based on the sequence data, we developed a methylation-specific PCR (MSP) for the m2a and m2b regions and applied it to the samples. Methylation-specific PCR revealed aberrant methylation in the m2a region in eight of 12 gastric cancer cell lines (67%), 16 of 35 gastric cancer tissues (46%) and 29 of 60 colorectal cancer tissues (48%), and in the m2b region in eight of 12 cell lines (67%), 15 of 35 gastric cancer tissues (43%) and 28 of 60 colorectal cancer tissues (47%). On the other hand, seven (12%) and 11 (19%) of 59 gastrointestinal nonmalignant mucosal specimens showed methylation in the m2a and m2b regions, respectively, suggesting that hDAB2IP methylation might play a causative role in carcinogenesis. The 5-aza-2′-deoxycytidine treatment restored the gene expression in the m2b-methylated cell lines, confirming that the methylation caused gene downregulation. We also examined the relationship between hDAB2IP methylation and the clinicopathological features in patients with primary tumours, and determined that methylation in the m2b region was associated with location of the tumour in the stomach. In summary, our results demonstrated that hDAB2IP methylation is frequently present in gastrointestinal tumours and that the resulting gene silencing plays an important role in gastrointestinal carcinogenesis.
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96
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Imai K, Tomaru Y, Naito M, Sakata Y, Abe T, Yumiko S, Syuho S, Kobayashi A, Yoda T. Evaluation of the recent trends in and surgical methods for deep neck infections. Int J Oral Maxillofac Surg 2005. [DOI: 10.1016/s0901-5027(05)81561-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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97
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Simón I, Naito M, Thorne MC, Walke R. Natural releases from contaminated groundwater, Example Reference Biosphere 2B. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2005; 84:171-84. [PMID: 15985320 DOI: 10.1016/j.jenvrad.2005.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2002] [Accepted: 02/28/2003] [Indexed: 05/03/2023]
Abstract
Safety assessment is a tool which, by means of an iterative procedure, allows the evaluation of the performance of a disposal system and its potential impact on human health and the environment. Radionuclides from a deep geological disposal facility may not reach the surface environment until many tens of thousands of years after closure of the facility. The BIOMASS Programme on BIOsphere Modelling and ASSessment developed Examples of "Reference Biospheres" to illustrate the use of the methodology and to demonstrate how biosphere models can be developed and justified as being fit for purpose. The practical examples are also intended to be useful in their own right. The Example Reference Biosphere 2B presented here involves the consideration of alternative types of geosphere-biosphere interfaces and calculation of doses to members of hypothetical exposure groups arising from a wide range of exposure pathways within agricultural and semi-natural environments, but without allowing for evolution of the corresponding biosphere system. The example presented can be used as a generic analysis in some situations although it was developed around a relatively specific conceptual model. It should be a useful practical example, but the above numerical results are not intended to be understood as prescribed biosphere 'conversion factors'.
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98
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Naito M, Sano A, Harumi T, Matsubara Y, Kuwana T. Migration of primordial germ cells isolated from embryonic blood into the gonads after transfer to stage X blastoderms and detection of germline chimaerism by PCR. Br Poult Sci 2004; 45:762-8. [PMID: 15697015 DOI: 10.1080/00071660400014325] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
1. The present study was carried out to determine whether primordial germ cells isolated from embryonic blood can enter the bloodstream and successfully migrate to the germinal ridges of recipient embryos after transfer to stage X blastoderms, and also whether they can differentiate into blood cells, as is suggested in mice. 2. Primordial germ cells were transfected in vitro by lipofection and then transferred to stage X blastoderms. The introduced GFP gene was efficiently expressed in the gonads of 6-d incubated embryos. 3. Freshly collected primordial germ cells were transferred to stage X blastoderms. The fate of the transferred primordial germ cells was traced by detecting the single nucleotide polymorphism in the D-loop region of the mitochondrial DNA in White Leghorn and Barred Plymouth Rock chickens used in this study. The transferred donor primordial germ cell-derived cells were detected in the gonads, but not in the blood cells, of 17-d incubated embryos by PCR. 4. This procedure for primordial germ cell manipulation could provide a novel method of producing germline chimaeric chickens. 5. In conclusion, our findings indicate that primordial germ cells isolated from embryonic blood can migrate to the germinal ridges of recipient embryos after being transferred to stage X blastoderms. Although these transferred primordial germ cells differentiated into germ cells, no differentiation into blood cells was observed.
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Yamaguchi T, Naito M, Asayama I, Ishiko T. Total hip arthroplasty: the relationship between posterolateral reconstruction, abductor muscle strength, and femoral offset. J Orthop Surg (Hong Kong) 2004; 12:164-7. [PMID: 15621900 DOI: 10.1177/230949900401200205] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
PURPOSE To evaluate the relationship between posterolateral reconstruction, abductor muscle strength, and femoral offset following total hip arthroplasty. METHODS Of 28 patients (56 limbs) we assessed, 12 underwent posterolateral reconstruction (reconstruction group) and 16 did not (non-reconstruction group). Isometric abductor muscle strength was measured with a handheld dynamometer. Each patient's muscle strength was converted into a force to body weight ratio, and this ratio was used in the comparisons. RESULTS The reconstruction group showed a higher value in abductor muscle strength than the non-reconstruction group (p<0.05). Significant correlation between abductor muscle strength and femoral offset was found in the reconstruction group (p=0.016; r=0.674). CONCLUSION Posterolateral reconstruction and appropriate reconstruction of femoral offset following total hip arthroplasty are important to improve the abductor muscle strength.
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Murase Y, Araki Y, Mizuno S, Kawaguchi C, Naito M, Yoshizawa M, Araki Y. Pregnancy following chemical activation of oocytes in a couple with repeated failure of fertilization using ICSI: Case report. Hum Reprod 2004. [DOI: 10.1093/humrep/deh570] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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