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Huang H, Okamoto M, Watanabe M, Matsumoto S, Moriyama K, Komichi S, Ali M, Matayoshi S, Nomura R, Nakano K, Takahashi Y, Hayashi M. Development of Rat Caries-Induced Pulpitis Model for Vital Pulp Therapy. J Dent Res 2023; 102:574-582. [PMID: 36913545 PMCID: PMC10152557 DOI: 10.1177/00220345221150383] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2023] Open
Abstract
Rodent animal models for vital pulp therapy are commonly used in dental research because their tooth anatomy and cellular processes are similar to the anatomy and processes in humans. However, most studies have been conducted using uninfected sound teeth, which makes it difficult to adequately assess the inflammatory shift after vital pulp therapy. In the present study, we aimed to establish a caries-induced pulpitis model based on the conventional rat caries model and then evaluate inflammatory changes during the wound-healing process after pulp capping in a model of reversible pulpitis induced by carious infection. To establish the caries-induced pulpitis model, the pulpal inflammatory status was investigated at different stages of caries progression by immunostaining targeted to specific inflammatory biomarkers. Immunohistochemical staining revealed that both Toll-like receptor 2 and proliferating cell nuclear antigen were expressed in moderate and severe caries-stimulated pulp, indicating that an immune reaction occurred at both stages of caries progression. M2 macrophages were predominant in moderate caries-stimulated pulp, whereas M1 macrophages were predominant in the severe caries-stimulated pulp. Pulp capping in teeth with moderate caries (i.e., teeth with reversible pulpitis) led to complete tertiary dentin formation within 28 d after treatment. Impaired wound healing was observed in teeth with severe caries (i.e., teeth with irreversible pulpitis). During the wound-healing process in reversible pulpitis after pulp capping, M2 macrophages were predominant at all time points; their proliferative capacity was upregulated in the early stage of wound healing compared with healthy pulp. In conclusion, we successfully established a caries-induced pulpitis model for studies of vital pulp therapy. M2 macrophages have an important role in the early stages of the wound-healing process in reversible pulpitis.
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Affiliation(s)
- H Huang
- Department of Restorative Dentistry and Endodontology, Graduate School of Dentistry, Osaka University, Suita-shi, Osaka, Japan
| | - M Okamoto
- Department of Restorative Dentistry and Endodontology, Graduate School of Dentistry, Osaka University, Suita-shi, Osaka, Japan
| | - M Watanabe
- Department of Restorative Dentistry and Endodontology, Graduate School of Dentistry, Osaka University, Suita-shi, Osaka, Japan
| | - S Matsumoto
- Department of Restorative Dentistry and Endodontology, Graduate School of Dentistry, Osaka University, Suita-shi, Osaka, Japan
| | - K Moriyama
- Department of Restorative Dentistry and Endodontology, Graduate School of Dentistry, Osaka University, Suita-shi, Osaka, Japan
| | - S Komichi
- Department of Restorative Dentistry and Endodontology, Graduate School of Dentistry, Osaka University, Suita-shi, Osaka, Japan
| | - M Ali
- Department of Restorative Dentistry, Faculty of Dentistry, University of Khartoum, Khartoum, Sudan
| | - S Matayoshi
- Department of Pediatric Dentistry, Graduate School of Dentistry, Osaka University, Suita-shi, Osaka, Japan
| | - R Nomura
- Department of Pediatric Dentistry, Graduate School of Dentistry, Osaka University, Suita-shi, Osaka, Japan.,Department of Pediatric Dentistry, Graduate School of Biomedical and Health Sciences, Hiroshima University, Minami-ku, Hiroshima
| | - K Nakano
- Department of Pediatric Dentistry, Graduate School of Dentistry, Osaka University, Suita-shi, Osaka, Japan
| | - Y Takahashi
- Department of Restorative Dentistry and Endodontology, Graduate School of Dentistry, Osaka University, Suita-shi, Osaka, Japan
| | - M Hayashi
- Department of Restorative Dentistry and Endodontology, Graduate School of Dentistry, Osaka University, Suita-shi, Osaka, Japan
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Watanabe M, Okamoto M, Komichi S, Huang H, Matsumoto S, Moriyama K, Ohshima J, Abe S, Morita M, Ali M, Takebe K, Kozaki I, Fujimoto A, Kanie K, Kato R, Uto K, Ebara M, Yamawaki-Ogata A, Narita Y, Takahashi Y, Hayashi M. Novel Functional Peptide for Next-Generation Vital Pulp Therapy. J Dent Res 2023; 102:322-330. [PMID: 36415061 PMCID: PMC9989233 DOI: 10.1177/00220345221135766] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Although vital pulp therapy should be performed by promoting the wound-healing capacity of dental pulp, existing pulp-capping materials were not developed with a focus on the pulpal repair process. In previous investigations of wound healing in dental pulp, we found that organic dentin matrix components (DMCs) were degraded by matrix metalloproteinase-20, and DMC degradation products containing protein S100A7 (S100A7) and protein S100A8 (S100A8) promoted the pulpal wound-healing process. However, the direct use of recombinant proteins as pulp-capping materials may cause clinical problems or lead to high medical costs. Thus, we hypothesized that functional peptides derived from recombinant proteins could solve the problems associated with direct use of such proteins. In this study, we identified functional peptides derived from the protein S100 family and investigated their effects on dental pulp tissue. We first performed amino acid sequence alignments of protein S100 family members from several mammalian sources, then identified candidate peptides. Next, we used a peptide array method that involved human dental pulp stem cells (hDPSCs) to evaluate the mineralization-inducing ability of each peptide. Our results supported the selection of 4 candidate functional peptides derived from proteins S100A8 and S100A9. Direct pulp-capping experiments in a rat model demonstrated that 1 S100A8-derived peptide induced greater tertiary dentin formation compared with the other peptides. To investigate the mechanism underlying this induction effect, we performed liquid chromatography-tandem mass spectrometry analysis using hDPSCs and the S100A8-derived peptide; the results suggested that this peptide promotes tertiary dentin formation by inhibiting inflammatory responses. In addition, this peptide was located in a hairpin region on the surface of S100A8 and could function by direct interaction with other molecules. In summary, this study demonstrated that a S100A8-derived functional peptide promoted wound healing in dental pulp; our findings provide insights for the development of next-generation biological vital pulp therapies.
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Affiliation(s)
- M Watanabe
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - M Okamoto
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - S Komichi
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - H Huang
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - S Matsumoto
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - K Moriyama
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - J Ohshima
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - S Abe
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - M Morita
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - M Ali
- Department of Restorative Dentistry, Faculty of Dentistry, University of Khartoum, Khartoum, Sudan
| | - K Takebe
- Department of Oral and Maxillofacial Surgery II, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - I Kozaki
- Department of Biomolecular Engineering, Graduate School of Engineering, Nagoya University, Aichi, Japan
| | - A Fujimoto
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Aichi, Japan
| | - K Kanie
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Aichi, Japan.,Department of Biotechnology and Chemistry, Faculty of Engineering, Kindai University, Hiroshima, Japan
| | - R Kato
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Aichi, Japan
| | - K Uto
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Ibaraki, Japan
| | - M Ebara
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Ibaraki, Japan
| | - A Yamawaki-Ogata
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Aichi, Japan
| | - Y Narita
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Aichi, Japan
| | - Y Takahashi
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - M Hayashi
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, Osaka, Japan
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Nagino T, Kaga C, Kano M, Masuoka N, Anbe M, Moriyama K, Maruyama K, Nakamura S, Shida K, Miyazaki K. Effects of fermented soymilk with Lactobacillus casei Shirota on skin condition and the gut microbiota: a randomised clinical pilot trial. Benef Microbes 2018; 9:209-218. [DOI: 10.3920/bm2017.0091] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Several clinical studies have shown that isoflavones and Lactobacillus casei Shirota (LcS) have beneficial effects on skin condition and the gut microbiota, respectively. Thus, we investigated the effects of consecutive intake of fermented soymilk (FSM) with LcS on skin condition and the gut microbiota, as well as isoflavone bioavailability, in a randomised, double-blind, placebo-controlled trial as a pilot study. Sixty healthy premenopausal Japanese women received FSM containing a moderate level of isoflavone aglycones and a probiotic LcS, or soymilk (SM) containing neither of them, twice a day for 8 weeks. Skin condition was assessed by a subjective questionnaire for face and morphological analysis of the stratum corneum on the inner forearm. Faecal microbiota and urinary isoflavone were analysed by 16S rRNA gene amplicon sequencing and high-performance liquid chromatography tandem mass spectrometry, respectively. Both the FSM and SM groups had improved skin condition as assessed from scores of overall satisfaction, dryness, moisture, elasticity, coarseness, pigmentation and/or stratum corneum morphology, as well as significantly increased levels of urinary isoflavones during the intake period compared with the pre-intake period, although there were no significant differences between the two groups. There was a significant positive correlation between urinary isoflavone levels and skin questionnaire scores. In contrast, the relative abundance levels of Lactobacillaceae significantly increased and those of Bifidobacteriaceae tended to increase during the intake period compared with the pre-intake period. For the after-intake period they only decreased significantly in the FSM group. The levels of Enterobacteriaceae and Porphyromonadaceae significantly decreased during the intake period in the FSM group. These findings suggest that daily intake of FSM, as well as SM, provides health benefits that improve skin condition via increased levels of isoflavone absorption in the body, and that only FSM beneficially modifies the gut microbiota in premenopausal healthy women.
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Affiliation(s)
- T. Nagino
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
| | - C. Kaga
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
| | - M. Kano
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
| | - N. Masuoka
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
| | - M. Anbe
- Yakult Honsha Co., Ltd., 1-1-19 Higashi-shinbashi, Minato-ku, Tokyo 105-8660, Japan
| | - K. Moriyama
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
| | - K. Maruyama
- RIKEN Innovation Center, Nakamura Laboratory, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - S. Nakamura
- RIKEN Innovation Center, Nakamura Laboratory, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - K. Shida
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
| | - K. Miyazaki
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
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Hitotsumachi H, Fujieda M, Yamaguchi M, Moriyama K, Besshi K, Morita F, Hakoi K. Chronological monitoring of miR-122 is sensitive and essential for pathologic reflection of hepatobiliary toxicity in vivo and in vitro. Toxicol Lett 2015. [DOI: 10.1016/j.toxlet.2015.08.726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Nakazono E, Miyazaki H, Abe S, Imai K, Masuda T, Iwamoto M, Moriguchi R, Ueno H, Ono M, Yazumi K, Moriyama K, Nakano S, Tsuda H. Discontinuation of leisure time impact-loading exercise is related to reduction of a calcaneus quantitative ultrasound parameter in young adult Japanese females: a 3-year follow-up study. Osteoporos Int 2014; 25:485-95. [PMID: 23794043 DOI: 10.1007/s00198-013-2416-4] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2012] [Accepted: 06/10/2013] [Indexed: 11/30/2022]
Abstract
UNLABELLED A 3-year follow-up study on 334 young Japanese females enrolled in a university at the age of 18 years revealed that discontinuation of leisure time impact-loading exercises performed in junior high and/or high school was associated with increased risk of reduction in calcaneus osteo-sono assessment index (OSI). INTRODUCTION Bone strength rapidly increases during puberty and reaches its peak by the end of adolescence. The aim of this study was to determine the lifestyle factors that influence the maintenance of calcaneus OSI in young adult females around the time when peak bone mass is attained. METHODS Annual health checkups including OSI measurements, anthropometrics, lifestyle analysis, and blood examination were performed 4 times on 334 Japanese females enrolled in a university at the age of 18 years. According to the slope of OSI change during the 3-year follow-up, the subjects were grouped into two categories: OSI loss (the lowest tertile) and OSI gain/stable (the second and third tertiles). RESULTS At the baseline assessment, the OSI loss group had higher OSI and height and an earlier menarche age than the OSI gain/stable group. Performing leisure time impact-loading exercise in junior high and/or high school but discontinuing it at university was associated with increased risk of OSI loss, independent of OSI, height and weight at the age of 18 years, weight change during follow-up, age of menarche, energy-adjusted nutrient intake, and alcohol drinking; the odds ratios were 4.1-4.9 compared with those performing impact-loading exercise at university. In particular, duration, frequency, and subjective intensity of impact-loading exercise during high school were positively associated with OSI loss. CONCLUSION Discontinuation of leisure time impact-loading exercises performed during late adolescence is associated with an increased risk of OSI loss in young adult females during the 3-year follow-up period.
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Affiliation(s)
- E Nakazono
- Graduate School of Health and Nutrition Sciences, Nakamura Gakuen University, 5-7-1, Befu, Jounan-ku, Fukuoka, 814-0198, Japan
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Hara Y, Nishida O, Nakamura T, Uchiyama S, Shibata J, Yamashita C, Yumoto M, Shimomura Y, Kuriyama N, Yasuoka N, Ito M, Kawata K, Hayakawa S, Yamada S, Miyasho T, Moriyama K. Extracorporeal membrane oxygenation: the MOTOR of cytokine production? Crit Care 2013. [PMCID: PMC3642403 DOI: 10.1186/cc12065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Miyachi K, Hoshino M, Kadobayashi H, Moriyama K, Asano M, Yamaguchi T, Fujita Y. Fluorophotometric determination of histone with 3,4,5,6-tetrafluoro-2-carboxyphenylfluorone-manganese(II) complex and its characterization. Chem Pharm Bull (Tokyo) 2013; 61:379-83. [PMID: 23385878 DOI: 10.1248/cpb.c12-00852] [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: 11/22/2022]
Abstract
A simple fluorophotometric method for the determination of histone has been developed. This method involves a fluorescence quenching reaction that results in the formation of a complex of manganese(II), 3,4,5,6-tetrafluoro-2-carboxyphenylfluorone (TFCPF), and histone in a non-ionic surfactant micellar medium. The calibration curve was found to be linear in the range of 0.5 to 2.0 µg/mL. The binding parameters (n, number of binding sites; K, binding constant) and thermodynamic parameters (ΔG(0), change in Gibbs free energy; ΔH(0), change in enthalpy; ΔS(0), change in entropy) were investigated spectrophotometrically for the elucidation of the reaction mechanism. The resulting binding parameters (n=4.08 and K=3.16×10(4) m(-1) at 25°C) and thermodynamic parameters (ΔG=-25.83 kJ/mol, ΔH=-9.83 kJ/mol, and ΔS=53.68 J/(mol K)) suggest that the colored complex in this reaction system is an ion-association complex between manganese(II)-TFCPF and histone.
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Affiliation(s)
- Kanako Miyachi
- Department of Hospital Pharmacy School of Medicine, Kinki University, Ohno-Higashi, Osaka-Sayama, Osaka, Japan
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Abstract
We investigated the roles of osteocytes in osteoclastic bone resorption during orthodontic tooth movement using the transgenic mice in which osteocytes can be specifically ablated. Because these transgenic mice express the receptor for diphtheria toxin on the cell surfaces of osteocytes, the injection of diphtheria toxin can ablate their osteocytes in vivo. Injection of diphtheria toxin into the transgenic mice significantly increased the number of ablated osteocytes in alveolar bone compared with that in wild-type mice with or without diphtheria toxin injection. Increased numbers of ablated osteocytes were observed from day 4 to day 12 after the injection in alveolar bones as well as in cortical bone of the tibiae. We applied the orthodontic force 4 days after the injection of diphtheria toxin, and the distance of tooth movement on day 12 was significantly smaller in transgenic mice than that in control mice. The numbers of osteoclasts and the quantity of eroded bone surface at the compression site were significantly reduced in the transgenic mice injected with diphtheria toxin than in control mice. These results provide in vivo demonstration of osteocyte involvement in osteoclastic bone resorption during orthodontic tooth movement.
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Affiliation(s)
- T Matsumoto
- Section of Oral Pathology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
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Nishida O, Nakamura T, Kuriyama N, Moriyama K, Miyasho T, Yamada S. Clinical impact of enhanced cytokine clearance with sustained high-efficiency daily diafiltration using a mediator-adsorbing membrane (SHEDD-fA) in patients with severe sepsis. Crit Care 2012. [PMCID: PMC3363801 DOI: 10.1186/cc10990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Nishida O, Yumoto M, Moriyama K, Shimomura Y, Miyasho T, Yamada S. Possible adsorption mechanism of high mobility group box 1 protein on a polyacrylonitrile (AN69ST) membrane filter. Crit Care 2012. [PMCID: PMC3363797 DOI: 10.1186/cc10986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Miyachi K, Kurokawa H, Moriyama K, Morimoto S, Tabuse K, Asano M, Yamaguchi T, Fujita Y. Spectrophotometric Determination of Micro Amounts of Albumin Using Zirconium(IV) and Xylenol Orange. CHEM LETT 2012. [DOI: 10.1246/cl.2012.58] [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: 11/13/2022]
Affiliation(s)
- Kanako Miyachi
- Department of Hospital Pharmacy, School of Medicine, Kinki University
| | | | - Kenzo Moriyama
- Department of Hospital Pharmacy, School of Medicine, Kinki University
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Maruoka Y, Kanaya F, Hoshino A, Iimura T, Imai H, Otsuka R, Ueha S, Fujioka K, Katsuragawa Y, Shimbo T, Mimori A, Yamazaki T, Manome Y, Omura K, Moriyama K, Matsushima K, Yamamoto K. Study of the relations between progressive/idiopathic condylar resorption and impaired bone/cartilage metabolism caused by chemokine receptor disorder. Int J Oral Maxillofac Surg 2011. [DOI: 10.1016/j.ijom.2011.07.414] [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: 10/16/2022]
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Kidera Y, Nakao M, Tsubaki M, Yoshinaga M, Kajitani F, Yanae M, Sakano M, Yamazoe Y, Chiba Y, Moriyama K, Nishida S. [Clinical evaluation of calculating carboplatin dosage using Japanese equation for estimating GFR for gynecologic cancer]. Gan To Kagaku Ryoho 2011; 38:1143-1148. [PMID: 21772099] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Glomerular filtration rate (GFR) is an important factor when considering carboplatin dosage adjustment. The Japanese equation for estimating GFR (eGFR) was recommended as a guideline for evaluating GFR in 2009 by The Japanese Society of Nephrology. However, benefits in the field of cancer chemotherapy with the use of eGFR have not yet been shown. To clarify the clinical benefits of eGFR, we investigated the renal function of 100 patients with gynecologic cancer who were treated with carboplatin from 2003 through 2009, and the carboplatin dosage was calculated by the Calvert formula in which eGFR was substituted for GFR. To predict the clinical benefit on the basis of carboplatin dosage using eGFR, we retrospectively divided the patients into two groups so that carboplatin dosage was within dosage in using eGFR and one was not. We compared response rates and adverse effects of the two groups. Renal function using eGFR was lower than renal function calculated by using the other formulae. Carboplatin dosage using eGFR was significantly lower than the dosage calculated with the other formulae (p<0.01). Moreover, the patients group actually, administered the dosage calculated by eGFR showed less side effects than the group of patients not treated this way, but the efficacy did not change. Thus, using eGFR in planning carboplatin dosage suggested clinical application to patients with Japanese gynecologic cancer.
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Affiliation(s)
- Yasuhiro Kidera
- Division of Pharmacotherapy, Kinki University School of Pharmacy, Japan
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Tsuji H, Moriyama K, Nomoto K, Miyanaga N, Akaza H. Isolation of equol-producing bacterium to realize chemoprevention of prostate cancer. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.1565] [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: 11/20/2022] Open
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Ng IW, Ono T, Inoue-Arai MS, Honda E, Kurabayashi T, Moriyama K. Application of MRI movie for observation of articulatory movement during a fricative /s/ and a plosive /t/. Angle Orthod 2011; 81:237-44. [PMID: 21208075 DOI: 10.2319/060210-301.1] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE To use an accurate method of tooth visualization in magnetic resonance imaging (MRI) movie for the observation of spatio-temporal relationships among articulators. MATERIALS AND METHODS The subjects were two volunteers. Each subject repeated a vowel-consonant-vowel syllable (ie, /asa/; /ata/), and the run was measured using a gradient echo sequence. A custom-made clear retainer filled with the jelly form of ferric ammonium citrate was then fit onto the dental arch, and a T1-weighted turbo-spin-echo sequence was taken. Landmarks were used for superimposition of the incisor boundary onto sequential images of MRI movie. Tracings were conducted to observe the spatio-temporal relationships among articulators. RESULTS The incisor boundary was clearly visible in the magnetic resonance images. After superimposition, the contact distance of the tongue to palate/incisor was found to be longer during /t/-articulation than during /s/-articulation. There were prominent differences in images with and without tooth superimposition in the front oral cavity. CONCLUSIONS The method could distinctly extract a tooth boundary in MRI. Detailed configurational relationships between the tongue and tooth were observed during the production of a fricative and a plosive in MRI movie using this method.
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Affiliation(s)
- I W Ng
- Tokyo Medical and Dental University, Japan
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Tsubaki M, Yamazoe Y, Yanae M, Satou T, Itoh T, Kaneko J, Kidera Y, Moriyama K, Nishida S. Blockade of the Ras/MEK/ERK and Ras/PI3K/Akt pathways by statins reduces the expression of bFGF, HGF, and TGF-β as angiogenic factors in mouse osteosarcoma. Cytokine 2011; 54:100-7. [DOI: 10.1016/j.cyto.2011.01.005] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2010] [Revised: 12/11/2010] [Accepted: 01/07/2011] [Indexed: 11/30/2022]
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Suda N, Hattori M, Kosaki K, Banshodani A, Kozai K, Tanimoto K, Moriyama K. Correlation between genotype and supernumerary tooth formation in cleidocranial dysplasia. Orthod Craniofac Res 2011; 13:197-202. [PMID: 21040462 DOI: 10.1111/j.1601-6343.2010.01495.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
INTRODUCTION Cleidocranial dysplasia (CCD, MIM#119600), for which the responsible gene is RUNX2, is a genetic disorder characterized by hypoplasia or aplasia of the clavicles, patent fontanelles, and a short stature. Supernumerary teeth and delayed eruption and impaction of permanent teeth are frequently associated with CCD. Our previous study reported wide intrafamilial variation in supernumerary tooth formation associated with a mutation in the RUNT-domain of RUNX2, suggesting a low correlation between the genotype and supernumerary tooth formation. To further clarify this point, a more precise evaluation was performed. DESIGN Gene mutational analysis of nine Japanese individuals with CCD was performed. Dental and skeletal characteristics were examined based on patient examinations and radiographs. RESULTS Four different gene mutations, including one novel mutation in RUNX2 gene (NM_001024630), were identified. Among them, four individuals had the R225Q mutation, three siblings had the P224S mutation, and the other two individuals had different frame-shift mutations. Wide variations in supernumerary tooth formation were observed in individuals with identical gene mutations, and discordance was seen between monozygotic twins. Asymmetric supernumerary tooth formation was noted in five out of the nine individuals. CONCLUSION Individuals with identical gene mutations showed a wide variation in the supernumerary tooth formation. Not only the genotype but also environmental factors and a complex system including epigenetics and copy number variation might regulate supernumerary tooth formation in CCD.
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Affiliation(s)
- N Suda
- Maxillofacial Orthognathics, Department of Maxillofacial Reconstruction and Function, Division of Maxillofacial/Neck Reconstruction, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, Japan.
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Nishida O, Nakamura T, Kuriyama N, Hara Y, Moriyama K, Yumoto M, Shimomura Y. Sustained high-efficiency daily diafiltration using a cytokine-adsorbing membrane in the treatment of patients with severe sepsis. Crit Care 2011. [PMCID: PMC3061745 DOI: 10.1186/cc9535] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Yumoto M, Nishida O, Moriyama K, Shimomura Y, Nakamura T, Kuriyama N, Hara Y, Yamada S, Miyasho T. In vitro evaluation of HMGB1 removal with various membranes for continuous hemofiltration. Crit Care 2011. [PMCID: PMC3061744 DOI: 10.1186/cc9534] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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21
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Yanaka T, Moriyama K, Buchanan R. A New Ultra-High Resolution TEM, EM-002b, with a Unique Uhr Objective Lens Configuration. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-139-271] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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22
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Kidera Y, Satoh T, Ueda S, Okamoto W, Okamoto I, Fumita S, Yonesaka K, Hayashi H, Makimura C, Okamoto K, Kiyota H, Tsurutani J, Miyazaki M, Yoshinaga M, Fujiwara K, Yamazoe Y, Moriyama K, Tsubaki M, Chiba Y, Nishida S, Nakagawa K. High-dose dexamethasone plus antihistamine prevents colorectal cancer patients treated with modified FOLFOX6 from hypersensitivity reactions induced by oxaliplatin. Int J Clin Oncol 2011; 16:244-9. [DOI: 10.1007/s10147-010-0170-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2010] [Accepted: 11/29/2010] [Indexed: 10/18/2022]
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Nakao K, Moriyama K, Murata K, Matsuda H, Tani T. [Historical study on traditional Chinese formulations and crude drugs used for gouty arthritis]. Yakushigaku Zasshi 2011; 46:91-101. [PMID: 22849240] [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] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Rates of gouty arthritis with hyperuricemia have increased recently as it has become a lifestyle-related disease. We reviewed historical treatments for pain due to gouty arthritis in traditional Chinese medical books, with special interest in pathological causes, including dietary and drinking habits, as well as the frequency of crude drugs used in historical prescriptions. From the present historical survey, we showed that six traditional terms may be equivalent to modern gouty arthritis and that the "Manbyokaishun," a formulary edited in the 16th century in China, included medical information for gouty arthritis. Furthermore, the 46 prescriptions, including Sokeikakketsuto, mentioned in the "Manbyokaishun," were selected as likely treatments for gouty arthritis. The most common crude drugs in the 46 prescriptions were aconite root, angelica root, cinnamon bark, peony root and saposhnikovia root. The inhibitory activity of these crude drugs extracts against xanthine oxidase was investigated. Angelica root and saposhnikovia root showed more potent inhibitory activity (20% at 250 microg/mL) than aconite root (16%), notopterygium rhizome (15%) and cinnamon bark (12%).
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Affiliation(s)
- Kikuyo Nakao
- Research Institute of Oriental Medicine, Kinki University, 377-2 Ohno-higashi, Osaka-sayama, Osaka 589-8511
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Abstract
Agenesis of the permanent teeth is a congenital anomaly that is frequently seen in humans. Oligodontia is a severe type of tooth agenesis involving 6 or more congenitally missing teeth, excluding the third molars. Previous studies have indicated that mutations in the homeobox gene MSX1, paired domain transcription factor PAX9, and EDA are associated with non-syndromic oligodontia. This study reports a Japanese family (eight of 14 family members affected) with non-syndromic oligodontia who preferentially lacked molar teeth. In this family, a novel frameshift mutation (321_322insG) was identified in the paired domain of PAX9. The frameshift mutation caused altered amino acids in the paired domain and premature termination of translation by 26 amino acids. When transfected into COS-7 cells, the mRNA expression of 321_322insG PAX9 was comparable with that of wild-type PAX9. However, the mRNA of 321_322insG PAX9 was more unstable than that of wild-type PAX9. This mRNA instability caused a marked decrease in protein production, as evaluated by Western blot analysis and immunostaining. These findings suggest that the 321_322insG mutation causes insufficient function of PAX9 protein and haploinsufficiency as a genetic model of familial non-syndromic oligodontia with a PAX9 mutation.
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Affiliation(s)
- N. Suda
- Maxillofacial Orthognathics, Department of Maxillofacial Reconstruction and Function, Division of Maxillofacial/Neck Reconstruction, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1–5-45 Yushima, Bunkyo-ku, Tokyo, 113–8510, Japan
- Global Center of Excellence (GCOE) Program, International Research Center for Molecular Science in Tooth and Bone Diseases, Tokyo, Japan
| | - T. Ogawa
- Maxillofacial Orthognathics, Department of Maxillofacial Reconstruction and Function, Division of Maxillofacial/Neck Reconstruction, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1–5-45 Yushima, Bunkyo-ku, Tokyo, 113–8510, Japan
- Global Center of Excellence (GCOE) Program, International Research Center for Molecular Science in Tooth and Bone Diseases, Tokyo, Japan
| | - T. Kojima
- Division of Reconstructive Surgery for Oral and Maxillofacial Region, Department of Tissue Regeneration and Reconstruction, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - C. Saito
- Division of Reconstructive Surgery for Oral and Maxillofacial Region, Department of Tissue Regeneration and Reconstruction, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - K. Moriyama
- Maxillofacial Orthognathics, Department of Maxillofacial Reconstruction and Function, Division of Maxillofacial/Neck Reconstruction, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1–5-45 Yushima, Bunkyo-ku, Tokyo, 113–8510, Japan
- Global Center of Excellence (GCOE) Program, International Research Center for Molecular Science in Tooth and Bone Diseases, Tokyo, Japan
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Suda N, Bazar A, Bold O, Jigjid B, Garidkhuu A, Ganburged G, Moriyama K. A Mongolian patient with hypohidrotic ectodermal dysplasia with a novel P121S variant in EDARADD. Orthod Craniofac Res 2010; 13:114-7. [PMID: 20477971 DOI: 10.1111/j.1601-6343.2010.01484.x] [Citation(s) in RCA: 6] [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] [Indexed: 12/30/2022]
Abstract
INTRODUCTION Hypohidrotic ectodermal dysplasia is a genetic disorder characterized by diminished or a lack of sweating, congenital missing teeth, and sparse or absent hair. Three genes, EDA, EDAR, and EDARADD, all related to tumor necrosis factor signaling, have been reported as responsible genes for this disorder. Among them, the largest numbers of mutations have been identified in EDA, and only two mutations identified in EDARADD. MATERIALS AND METHODS DNA analysis of EDA, EDAR, and EDARADD was performed on a Mongolian patient by polymerase chain reaction-direct sequencing. RESULTS The 5-year-old Mongolian individual had no erupted deciduous or permanent teeth. A panoramic radiograph showed only one tooth in the right mandible. His hair and eyebrows were sparse, but he did not have a short stature. He showed diminished sweating. The nails of his fingers and toes were normal. Based on these conditions, he was diagnosed with hypohidrotic ectodermal dysplasia. There was no gene mutation of EDA or EDAR. A novel heterozygous variant (P121S; c.361C>T) was identified in the death domain of EDARADD (NM_080738). No other member of his family was affected, and this variant was not identified in his parents or maternal grandparents. CONCLUSION This study reports an individual affected with hypohidrotic ectodermal dysplasia with a novel heterozygous P121S variant in the death domain of EDARADD.
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Affiliation(s)
- N Suda
- Maxillofacial Orthognathics, Division of Maxillofacial/Neck Reconstruction, Department of Maxillofacial Reconstruction and Function, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan.
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Sakai S, Hirose K, Moriyama K, Kawakami K. Control of cellular adhesiveness in an alginate-based hydrogel by varying peroxidase and H(2)O(2) concentrations during gelation. Acta Biomater 2010; 6:1446-52. [PMID: 19818883 DOI: 10.1016/j.actbio.2009.10.004] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2009] [Revised: 09/29/2009] [Accepted: 10/01/2009] [Indexed: 10/20/2022]
Abstract
An aqueous solution of alginate possessing phenolic hydroxyl (Alg-Ph) groups is gellable via a horseradish peroxidase (HRP)-catalyzed oxidative crosslinking reaction between Ph groups, consuming H(2)O(2) as an electron acceptor. This study evaluates the effect of H(2)O(2) and HRP concentrations on cellular adhesiveness and proliferation on the resultant enzymatically crosslinked Alg-Ph gels. After 4h of seeding, 81.1% of L929 fibroblast cells adhere to an Alg-Ph hydrogel prepared with 1 U ml(-1) HRP and 1mM H(2)O(2). Increasing the concentration of H(2)O(2) to 15 mM decreases the percentage of adhering cells to 28.4%. The cellular adhesion at this H(2)O(2) concentration is increased to 82.6% by increasing the HRP concentration to 10 U ml(-1). The cells adhering to the Alg-Ph hydrogels with higher cellular adhesiveness establish a confluent monolayer during 168 h of culture. A cell sheet can then be harvested within 5 min of immersion in a medium containing alginate lyase at 1.0 mg ml(-1). The harvested cell sheet re-adhere, and the cells contained in the sheet proliferate after being transferred to another cell culture dish.
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Suzaki N, Kadi S, Miyachi K, Moriyama K, Kamino S, Yamaguchi T, Fujita Y. Spectrophotometric Determination of Chlorpromazine in Preparation with o-Sulfophenylfluorone and Gallium(III). BUNSEKI KAGAKU 2010. [DOI: 10.2116/bunsekikagaku.59.727] [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: 11/23/2022]
Affiliation(s)
| | | | - Kanako Miyachi
- Department of Hospital Pharmacy School of Medicine, Kinki University
| | - Kenzo Moriyama
- Department of Hospital Pharmacy School of Medicine, Kinki University
| | - Shinichiro Kamino
- Department of Pharmaceutical Analytical Chemistry Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
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Abstract
Wound healing is a well-orchestrated complex process leading to the repair of injured tissues. It is suggested that transforming growth factor (TGF)-beta/Smad3 signaling is involved in wound healing. The purpose of this study was to investigate the role of TGF-beta/Smad3 signaling in palatal wound healing in Smad3-deficient (Smad3(-/-)) mice. Histological examination showed that wound closure was accelerated by the proliferation of epithelium and dermal cells in Smad3(-/-) mice compared with wild-type (WT) mice. Macrophage/monocyte infiltration at wounded regions in Smad3(-/-) mice was decreased in parallel with the diminished production of TGF-beta1, monocyte chemoattractant protein-1, and macrophage inflammatory protein-1alpha compared with WT mice. Fibrocytes, expressing hematopoietic surface marker and fibroblast products, were recruited and produced alpha-smooth-muscle actin in WT mice, but were not observed in Smad3(-/-) mice. These results suggest that TGF-beta/Smad3 signaling may play an important role in the regulation of palatal wound healing.
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Affiliation(s)
- K Jinno
- Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Oral Sciences, Tokushima University, 3-18-15 Kuramoto-cho, Tokushima 770-8504, Japan.
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Abstract
Amelogenin is recognized as an enamel protein associated with enamel formation. Besides this well-known function, remarkable root resorption has been seen in amelogenin-null mutant mice. Moreover, in vitro culture studies showed that amelogenin suppressed osteoclast differentiation. These studies raised the hypothesis that amelogenin can inhibit root resorption by reducing odontoclast number. To examine this hypothesis, we applied porcine amelogenins in a rat root resorption model, in which maxillary first molars were replanted after being air-dried. Compared with untreated and carrier-treated tooth roots, the application dramatically reduced the odontoclast number on root surfaces and inhibited cementum and root dentin resorption. Amelogenin significantly reduced the number of human odontoclastic cells in culture. It also inhibited RANKL expression in mouse bone marrow cell cultures. All these findings support our hypothesis that amelogenin application suppresses root resorption by inhibiting odontoclast number, and suggest that this is mediated by the regulation of RANKL expression.
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Affiliation(s)
- Y Yagi
- Maxillofacial Orthognathics, Department of Maxillofacial Reconstruction and Function, Division of Maxillofacial/Neck Reconstruction, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
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Sato Y, Yamada T, Hata T, Moriyama K, Yunoki A, Hino Y. The efficiency variation method for 4πβ−γ coincidence counting by ink-jet printing. Appl Radiat Isot 2008; 66:691-3. [DOI: 10.1016/j.apradiso.2008.02.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Hashimoto K, Otsuka R, Minato A, Sato-Wakabayashi M, Takada J, Inoue-Arai MS, Miyamoto JJ, Ono T, Ohyama K, Moriyama K. Short-term changes in temporomandibular joint function in subjects with cleft lip and palate treated with maxillary distraction osteogenesis. Orthod Craniofac Res 2008; 11:74-81. [DOI: 10.1111/j.1601-6343.2007.00412.x] [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: 11/30/2022]
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Kinouchi N, Ohsawa Y, Ishimaru N, Ohuchi H, Sunada Y, Hayashi Y, Tanimoto Y, Moriyama K, Noji S. Atelocollagen-mediated local and systemic applications of myostatin-targeting siRNA increase skeletal muscle mass. Gene Ther 2008; 15:1126-30. [PMID: 18323791 DOI: 10.1038/gt.2008.24] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
RNA interference (RNAi) offers a novel therapeutic strategy based on the highly specific and efficient silencing of a target gene. Since it relies on small interfering RNAs (siRNAs), a major issue is the delivery of therapeutically active siRNAs into the target tissue/target cells in vivo. For safety reasons, strategies based on vector delivery may be of only limited clinical use. The more desirable approach is to directly apply active siRNAs in vivo. Here, we report the effectiveness of in vivo siRNA delivery into skeletal muscles of normal or diseased mice through nanoparticle formation of chemically unmodified siRNAs with atelocollagen (ATCOL). ATCOL-mediated local application of siRNA targeting myostatin, a negative regulator of skeletal muscle growth, in mouse skeletal muscles or intravenously, caused a marked increase in the muscle mass within a few weeks after application. These results imply that ATCOL-mediated application of siRNAs is a powerful tool for future therapeutic use for diseases including muscular atrophy.
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Affiliation(s)
- N Kinouchi
- Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, The University of Tokushima, Tokushima, Japan
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Suda N, Hamada T, Hattori M, Torii C, Kosaki K, Moriyama K. Diversity of supernumerary tooth formation in siblings with cleidocranial dysplasia having identical mutation in RUNX2 : possible involvement of non-genetic or epigenetic regulation. Orthod Craniofac Res 2008; 10:222-5. [PMID: 17973689 DOI: 10.1111/j.1601-6343.2007.00404.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
INTRODUCTION Cleidocranial dysplasia (CCD, MIM #119600) is an autosomal-dominant disorder characterized by hypoplasia or aplasia of clavicles, patent fontanelles and short stature. The responsible gene has been identified as RUNX2. CCD is also accompanied by characteristic dental abnormalities, e.g. supernumerary teeth, delayed eruption and impaction of permanent teeth. Intrafamilial variations of skeletal abnormalities are reported but those of dental abnormalities are obscure. To clarify this point, a precise examination of the dental features of CCD siblings having identical mutation was performed. DESIGN Gene mutational analysis of three Japanese CCD siblings and their father was performed. Skeletal and dental characteristics were examined by the inquiry and radiographs. RESULTS Three siblings uniformly showed patent fontanelles and short stature. They and their father had a novel missense mutation in the RUNT-domain (P210S) of RUNX2. The siblings were completely discordant for the dental characteristics with the position and number of supernumerary teeth being completely different. The youngest, a 12-year-old boy, had six supernumerary teeth, which appeared symmetrically around the maxillary canines and mandibular premolars. The second, a 15-year-old girl, had four supernumerary teeth which appeared around the mandibular incisors. The oldest, a 17-year-old boy, had 11 supernumerary teeth, which were symmetrically around the mandibular lateral dentition and asymmetrically around the maxillary incisors and premolars. CONCLUSION The present study suggests the involvement of non-genetic or epigenetic regulation in supernumerary tooth formation in CCD.
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Affiliation(s)
- N Suda
- Department of Maxillofacial Reconstruction and Function, Division of Maxillofacial/Neck Reconstruction, Graduate School, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan.
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Abstract
BACKGROUND AND OBJECTIVE Differential expression of genes in human periodontal ligament (PDL) under mechanical stress, such as orthodontic force, is thought to be involved in the remodeling of PDL cells and periodontal tissues. However, little is known about the genes expressed in PDL cells under mechanical stress. MATERIAL AND METHODS We employed microarray analysis to assess, in a comprehensive manner, the gene expression profiles in PDL cells compressed by a static force using an in vitro three-dimensional culture system. Six genes were selected and validated by quantitative real-time polymerase chain reaction analysis, consistent with the microarray data. RESULTS The microarray data revealed that 108 of 30,000 genes tested were differentially expressed by mechanical force loading. Among them, 85 genes were up-regulated by mechanical stress, while 23 genes were down-regulated, judging by the thresholds of a two-fold increase/decrease compared with the controls. Thirty-two of the up-regulated and eight of the down-regulated genes, well-characterized in protein function, were involved in numerous biological processes including cell communication, cell signaling, cell cycle, stress response, and calcium release. However, several genes differentially expressed in our microarray data have not been well defined as stress-response molecules. CONCLUSION Our microarray is the first to show the gene profile in PDL cells caused by mechanical stress; however, further studies to clarify the physiological function of these molecules in PDL cells are required.
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Affiliation(s)
- R M S de Araujo
- Department of Orthodontics and Dentofacial Orthopedics, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
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Miyachi K, Moriyama K, Yamaguchi T, Tominaga H, Kamino S, Fujita Y. Spectrophotometric Determination of Spermine and Related Compounds Using o-Hydroxyhydroquinonephthalein and Manganese(II). ANAL SCI 2007; 23:1103-7. [PMID: 17878586 DOI: 10.2116/analsci.23.1103] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A simple and highly sensitive spectrophotometric method for the determination of spermine (Spm) was established based on the ternary complex formation reaction of Spm with o-hydroxyhydroquinonephthalein (QP) as a xanthene dye and manganese(II) as a metal ion in the presence of a dispersion agent. The apparent molar absorptivity at 555 nm and the relative standard deviation of the proposed method were 1.4 x 10(5) dm(3) mol(-1) cm(-1) and 0.50% (n = 10), respectively. In the method for flow-injection analysis (FIA), which employs a single-channel flow manifold system, a good linear relationship was observed over the 2 - 20 pg microl(-1) range of Spm by direct injection.
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Affiliation(s)
- Kanako Miyachi
- Department of Hospital Pharmacy School of Medicine, Kinki University, Osaka, Japan.
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Shimoyama T, Harano H, Matsumoto T, Moriyama K, Hata T, Kudo K, Koyamada T, Uritani A. Development of the fast neutron standard using a Be({alpha},n) reaction at the National Metrology Institute of Japan. Radiat Prot Dosimetry 2007; 126:130-3. [PMID: 17513862 DOI: 10.1093/rpd/ncm028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
This paper describes the 8-MeV neutron field where the neutrons are generated in the (9)Be(alpha,n)(12)C reaction by bombardment of a beryllium target with a 2.4-MeV (4)He(+) beam from a Van de Graaff accelerator. The neutron field is being prepared for a new national standard on neutron fluence in Japan. Absolute measurement of the neutron fluence was taken using a proton recoil neutron detector, consisting of a silicon surface barrier detector with a polyethylene radiator. Neutron spectra were measured using a newly developed recoil proton spectrometer and a liquid organic scintillation detector. The gamma rays existing in the field were also characterised using a liquid organic scintillation detector. The ambient dose equivalents of the gamma rays were estimated to be <100 microSv at the neutron fluence of 10(7) neutrons cm(-2).
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Affiliation(s)
- T Shimoyama
- National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan.
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Nomura M, Hata T, Naitoh S, Kuwano H, Kuwao H, Moriyama K, Fukuoka M, Kudo M, Tohda Y. Studies on the variation in clinical laboratory data and safety evaluation of pharmaceuticals. YAKUGAKU ZASSHI 2005; 125:997-1004. [PMID: 16327245 DOI: 10.1248/yakushi.125.997] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The safety of pharmaceuticals has become increasingly important not only in daily medical treatment but also in clinical trials. Although clinical laboratory data are more objective than clinical symptoms, the determination as to whether they indicate abnormal variations depends largely upon the clinical judgment of physicians. The process of determination has not been sufficiently objectified. The present study investigated the indices of criteria for variations in clinical laboratory data obtained in clinical trials. Then, detection rates of abnormal variations were compared between our determination method that employs the reference change value (RCV) expressing the width of biological variation for each test component and conventional determination methods. The study also demonstrated that by combining standard values and the RCV for determination, abnormal variations were found at a rate greater than 50%. The method we propose was applied to the safety evaluation of pharmaceuticals. In clinical trials on the antiviral drug ribavirin administered alone, components of laboratory tests were selected that should be noted in studies on its effects. Expect for decreases in red blood cell counts and hemoglobin values, which are closely associated with anemic symptoms and well known to hepatologists, the increasing trend in platelet counts and decreasing trend in albumin were found to be laboratory test components that should be paid attention to, even though they may not be obvious.
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Wang Y, Mitchell J, Sharma M, Gabriel A, Moriyama K, Palmer PP. Leukotrienes mediate 5-hydroxytryptamine-induced plasma extravasation in the rat knee joint via CysLT-type receptors. Inflamm Res 2004; 53:66-71. [PMID: 15021971 DOI: 10.1007/s00011-003-1224-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2003] [Accepted: 09/27/2003] [Indexed: 10/26/2022] Open
Abstract
OBJECTIVE AND DESIGN The aim of this study was to investigate whether leukotrienes synthesized by 5-lipoxygenase (5-LO) and acting via leukotriene (LT) receptors contribute to 5-hydroxytryptamine (5-HT)-induced knee joint plasma extravasation (PE). MATERIALS AND METHODS Knee joints of rats under anesthesia were perfused with 5-HT and synovial vascular Evans Blue dye leakage was measured spectrophotometrically. A series of 5-LO inhibitors and LT receptor antagonists were investigated for their ability to inhibit 5-HT-induced synovial PE. RESULTS Inhibitors of 5-LO (NDGA and REV 5901) significantly attenuated 5-HT-induced plasma extravasation. MK 571, LY 171883, BAY u9773 (CysLT receptor antagonists) and REV 5901 (a CysLT receptor antagonist and a 5-LO inhibitor) were equally effective in inhibiting 5-HT-induced PE, indicating that leukotrienes mediate 5-HT-induced PE via CysLT receptors. In contrast, antagonists selective for LTB(4) receptors (BLT(1) and BLT(2) receptors) failed to reduce 5-HT-induced PE. CONCLUSIONS These results demonstrate that leukotrienes, specifically cysteinyl-leukotrienes contribute to synovial plasma extravasation and suggest that leukotrienes act downstream of 5-HT in the inflammatory cascade.
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Affiliation(s)
- Y Wang
- Department of Anesthesia and Perioperative Care, University of California, 513 Parnassus Avenue, San Francisco, California 94143, USA
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39
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Moriyama K, Okuda J, Saijo M, Hattori Y, Kanamoto N, Hataya Y, Matsuda F, Mori T, Nakao K, Akamizu T. Recombinant monoclonal thyrotropin-stimulation blocking antibody (TSBAb) established from peripheral lymphocytes of a hypothyroid patient with primary myxedema. J Endocrinol Invest 2003; 26:1076-80. [PMID: 15008244 DOI: 10.1007/bf03345253] [Citation(s) in RCA: 9] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Anti-TSH receptor antibodies (TRAbs) have been known to be involved in Graves' disease and primary hypothyroidism. We previously isolated and reconstituted immunoglobulin (Ig) genes of Epstein-Barr virus-transformed B cell clones producing monoclonal TRAbs obtained from Graves' patients. In the present study, we performed a similar experiment using a B cell clone, 32A-5, derived from a patient with primary hypothyroidism. The variable region genes of Ig heavy (H) and light (L) chains were isolated and sequenced from the 32A-5 clone. A significant number of somatic mutations were found in variable regions of H and L chain gene segments. Each pair of H and L chain cDNAs was ligated into an expression vector for IgG1 production and stably introduced into myeloma cells. The transfectants were injected ip into BALB/c mice to yield ample volume of the antibody for following applications. Interactions of recombinant 32A-5 with Graves' sera with varying thyroid-stimulating antibody (TSAb) activities were studied. The recombinant antibody tended to suppress TSAb activities in 10 of 15 Graves' sera, in which four were significantly inhibited. In summary, this is the first study to analyze human monoclonal TSH-stimulation blocking antibodies (TSBAb) at the molecular level. Use of human recombinant monoclonal TSBAb may be an analytical tool for molecular-basis etiology and an alternative therapeutic path for Graves' disease.
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Affiliation(s)
- K Moriyama
- Department of Medicine and Clinical Science, Kyoto University Graduate School of Medicine, Kyoto, Japan
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Moriyama K, Okada T, Loakes D, Negishi K. Retrovirus-specific random mutagenesis by a nucleoside 5'-triphosphate analogue, PTP. Nucleic Acids Symp Ser 2003:71-2. [PMID: 12903273 DOI: 10.1093/nass/44.1.71] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
In a retrovirus replication model system, which consists of in vitro transcription and reverse transcription cycles, 6-(beta-D-ribofuranosyl)-3,4- dihydro-8H-pyrimido[4,5-c][1,2]oxazin-7-one-5'-triphosphate (PTP) induced highly efficient random mutations and this was due to the ambiguous incorporation of PTP by RNA polymerases. The types of mutations were mainly C-to-U or U-to-C transition mutations and the frequency was about 4 x 10(-2)/nucleotide during four cycles of the replication. Since a high mutation rate is harmful to species, PTP may be new candidate for anti-retroviral drugs. N4-aminoCTP and N4-hydroxyCTP were also incorporated ambiguously by RNA polymerase. These compounds may have a potential to induce mutation by the same mechanism as PTP.
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Affiliation(s)
- K Moriyama
- Gene Research Center, Okayama University, Tsushima, Okayama 700-8530, Japan
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41
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Moriyama K, Okada T, Loakes D, Miyano-Kurosaki N, Takaku H, Negishi K. Reverse transcriptional mutagenesis induced by ribonucleoside triphosphate analogue, PTP and its availability for anti-HIV-1 therapy. Nucleic Acids Res Suppl 2003:255-6. [PMID: 12836361 DOI: 10.1093/nass/1.1.255] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The bicyclic pyrimidine analogue, 3,4-dihydro-6H,8H-pyrimido[4,5-c][1,2]oxazin-7-one (P) can base pair with both A and G. The riboside 5'-triphsophate of P (PTP) efficiently induces mutation during in vitro transcription and reverse transcription cycles using a phage promoter. In the present study, we have constructed an in vitro transcription system promoted by the human immunodeficiency virus type 1 (HIV-1) 5'-long terminal repeat (LTR) using HeLa nuclear extract supplemented with HIV-1 Tat protein. Using this system, the effects of mutagenic ribonucleotide analogues were studied.
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Affiliation(s)
- K Moriyama
- Gene Research Center, Okayama University, 1-1-1 Tsushima-naka, Okayama 700-8530, Japan
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Usui T, Ikeda Y, Tagami T, Matsuda K, Moriyama K, Yamada K, Kuzuya H, Kohno S, Shimatsu A. The phytochemical lindleyin, isolated from Rhei rhizoma, mediates hormonal effects through estrogen receptors. J Endocrinol 2002; 175:289-96. [PMID: 12429027 DOI: 10.1677/joe.0.1750289] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [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: 11/27/2022]
Abstract
Some plant compounds or herb mixtures are popular alternatives to conventional therapies and contain organic compounds that bind to some nuclear receptors, such as the estrogen receptor (ER), to exert various biological effects. We studied the effect of various herbal extracts on ERalpha and ERbeta isoforms. One herbal extract, Rhei rhizoma (rhubarb), acts as an agonist to both ERalpha and ERbeta. The phytochemical lindleyin, a major component of rhubarb, might contribute to this estrogenic activity through ERalpha and ERbeta. 4-Hydroxytamoxifen, an ER antagonist, completely reversed the estrogenic activity of lindleyin. Lindleyin binds to ERalpha in vitro, as demonstrated using a fluorescent polarization assay. The in vivo effect of rhubarb extract was studied using a vitellogenin assay system in the freshwater fish, Japanese medaka (Oryzias latipes). There were marked increases in serum vitellogenin levels in male medaka exposed to rhubarb extract. We conclude that lindleyin, a component of some herbal medicines, is a novel phytoestrogen and might trigger many of the biological responses evoked by the physiological estrogens.
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Affiliation(s)
- T Usui
- Clinical Research Institute, Center for Endocrine and Metabolic Disease, Kyoto National Hospital, Kyoto, Japan.
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43
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Akamizu T, Ozaki S, Hiratani H, Uesugi H, Sobajima J, Hataya Y, Kanamoto N, Saijo M, Hattori Y, Moriyama K, Ohmori K, Nakao K. Drug-induced neutropenia associated with anti-neutrophil cytoplasmic antibodies (ANCA): possible involvement of complement in granulocyte cytotoxicity. Clin Exp Immunol 2002; 127:92-8. [PMID: 11882038 PMCID: PMC1906299 DOI: 10.1046/j.1365-2249.2002.01720.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [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] [Indexed: 11/20/2022] Open
Abstract
Although antineutrophil antibodies are thought to be involved in drug-induced neutropenia, neither the precise mechanisms nor the particular antigens on the neutrophil surface have yet been clarified. Recently, we examined a patient with Graves' disease who developed antineutrophil cytoplasmic antibodies (ANCA) after propylthiouracil treatment and exhibited neutropenia. Because several target antigens of ANCA are expressed on the surface of neutrophils, it was suggested that ANCA might contribute to neutropenia. The patient's serum bound specifically to neutrophils and HL-60 cells differentiated into granulocytes, and lysed the HL-60 cells via a complement-mediated mechanism. Furthermore, two representative ANCA antigens, proteinase 3 and myeloperoxidase, significantly inhibited both the binding and cytotoxicity of the serum. Finally, tumour necrosis factor-alpha, which is known to up-regulate cell surface expression of several ANCA antigens, enhanced both the binding and cytotoxicity of the serum. These findings suggest that ANCA induced by propylthiouracil contributed to leucopenia through a complement-mediated mechanism.
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Affiliation(s)
- T Akamizu
- Department of Medicine and Clinical Science, Kyoto Universoty Graduate School of Medicine, Japan.
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Salas Cordova J, Yokozeki M, Moriyama K. An unusual ankylosis in an orthodontic case. J Clin Orthod 2001; 35:763-6. [PMID: 11822299] [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] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Affiliation(s)
- J Salas Cordova
- Department of Orthodontics, School of Dentistry, University of Tokushima, 3-18-15, Kuramoto-cho, Tokushima, 770-8503, Japan.
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Tateishi C, Moriyama K, Takano-Yamamoto T. Dentocraniofacial morphology of 12 Japanese subjects with unilateral cleft lip and palate with a severe Class III malocclusion: a cephalometric study at the pretreatment stage of surgical orthodontic treatment. Cleft Palate Craniofac J 2001; 38:597-605. [PMID: 11681993 DOI: 10.1597/1545-1569_2001_038_0597_dmojsw_2.0.co_2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE The present study clarifies the dentocraniofacial morphology of patients with cleft lip and palate (CLP) with severe Class III malocclusion prior to surgical orthodontic treatment. METHODS The sample was 12 Japanese male subjects with repaired complete unilateral CLP (surgical CLP group; 21.2 +/- 1.92 years in mean age). Two sets of patients without CLP Class III malocclusion, consisting of 19 male subjects treated by surgical orthodontic treatment (surgical Class III group; 23.4 +/- 6.35 years in mean age) and 14 male subjects treated by nonsurgical orthodontic treatment (nonsurgical Class III group; 18.7 +/- 3.49 years in mean age) were used as controls. Analyses were performed using lateral and posteroanterior (P-A) cephalograms. RESULTS (1) The surgical CLP group showed significantly smaller values for overjet, SNA angle, and inclination of the maxillary incisor as compared with those of the surgical and nonsurgical Class III controls. The values of SNB, mandibular effective length, and ramus height in the surgical CLP group were significantly smaller than those of the surgical Class III group but were similar to those of the nonsurgical Class III group. (2) The mandible and the upper and lower dental arches deviated laterally toward the cleft side. The displacement of the mandible was correlated with that of the maxilla. These results show that CLP patients who required surgical orthodontic treatment had a characteristic dentocraniofacial morphology, compared to controls without CLP with Class III malocclusion.
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Affiliation(s)
- C Tateishi
- Department of Oral and Maxillofacial Surgery, Kobe University School of Medicine, Kobe, Japan
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Moriyama K, Kojima T, Minawa Y, Matsumoto S, Nakamachi K. Development of artificial seed crystal for crystallization of calcium phosphate. Environ Technol 2001; 22:1245-52. [PMID: 11804345 DOI: 10.1080/09593330.2001.9619163] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
An artifical seed crystal material consisting of calcium silicate hydrate (5CaO x 6SiO2 x 5H2O : tobermorite crystals) applicable for phosphorus removal by crystallization was developed. Card-house shaped tobermorite crystals were developed on the seed material where orthophosphate crystallized as a calcium phosphate. The seed material can be manufactured by mixing siliceous and calcareous raw materials, pelletizing and subsequent autoclaving. Laboratory experiments were conducted to apply the new developed seed crystal material in the phosphorus recovery from sludge sidestreams of a wastewater treatment plant. In this crystallization process, the performance the carbon dioxide degassingprocess usually carried out when applying crystallization was not necessary, the hydroxyapatite was able to crystallize at a pH of 8.0 to 8.5 without precipitation of calcium carbonates. In the treatment of a sidestream with orthophosphate concentrations of 50 mgl(-1) and COD concentrations between 200 to 400 mgl(-1), phosphorus removal efficiencies ranging from 75 to 85% were observed. The seed crystal material was collected after the laboratory experiments and the chemical estimation and the germination test for agricultural reuse were performed. As a result, it was shown that the hydroxyapatite precipitated on the seed material had a 100% fusibility to soil and had characteristics to be a good nutrient source as a fertilizer for plants.
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Affiliation(s)
- K Moriyama
- Department of Civil Engineering, Faculty of Engineering, Kyushu Kyoritsu University Kitakyushu, Japan
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Hataya Y, Akamizu T, Takaya K, Kanamoto N, Ariyasu H, Saijo M, Moriyama K, Shimatsu A, Kojima M, Kangawa K, Nakao K. A low dose of ghrelin stimulates growth hormone (GH) release synergistically with GH-releasing hormone in humans. J Clin Endocrinol Metab 2001. [PMID: 11549707 DOI: 10.1210/jc.86.9.4552] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The synergistic relationship between GH-releasing secretagogue (GHS) and GH-releasing hormone (GHRH) with respect to GH secretion is well known. In the present study, we report a similar relationship between GHRH and ghrelin, a recently identified endogenous ligand for the GHS receptor. In normal male adults, various doses of ghrelin were intravenously administered alone or together with 1.0 microg/kg GHRH. At small doses of 0.08 and 0.2 microg/kg ghrelin, combined administration of the two peptides significantly stimulated GH release in a synergistic manner; the mean GH response values of the two peptide combinations were more than the summed mean GH response values of each peptide alone (P < 0.05). In addition, at 1.0 microg/kg ghrelin, the tendency of the synergistic effect was observed, although the comparison was not statistically significant probably due to a submaximal dose ceiling effect. No synergistic effects with respect to ACTH or prolactin secretion were observed. In conclusion, the synergistic interaction between ghrelin and GHRH was clearly shown and might be useful for a provocation test to diagnose GH deficiency.
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Affiliation(s)
- Y Hataya
- Department of Medicine and Clinical Science, Kyoto University Graduate School of Medicine, Kyoto 606-8507, Japan
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Kanamoto N, Akamizu T, Hosoda H, Hataya Y, Ariyasu H, Takaya K, Hosoda K, Saijo M, Moriyama K, Shimatsu A, Kojima M, Kangawa K, Nakao K. Substantial production of ghrelin by a human medullary thyroid carcinoma cell line. J Clin Endocrinol Metab 2001; 86:4984-90. [PMID: 11600575 DOI: 10.1210/jcem.86.10.7891] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Ghrelin, an endogenous ligand for the GH secretagogue receptor, is a novel acylated peptide produced in the gastrointestinal endocrine cells as well as neuroendocrine cells in the hypothalamus. The Ser(3) residue of ghrelin is modified by n-octanoic acid, a modification necessary for hormonal activity. Human medullary thyroid carcinoma is known to produce a variety of gastrointestinal and neuroendocrine peptides. In the present study we investigated ghrelin production in the thyroid gland, especially in human medullary thyroid carcinoma. PCR amplification demonstrated prepro-ghrelin gene transcripts in normal human thyroid tissue and two medullary thyroid carcinoma cell lines (human TT cells and rat 6-23 cells), but not in a rat thyroid follicular cell line. TT cells showed the expression of prepro-ghrelin mRNA of about 0.6 kb by Northern blot analysis. Furthermore, production of ghrelin in TT cells was demonstrated by RIA and immunocytochemistry. Accumulation of des-n-octanoyl ghrelin in the cultured medium of the cells was confirmed. Finally, human medullary thyroid carcinoma surgical specimens showed significantly higher des-n-octanoyl ghrelin contents than normal thyroid tissues. In conclusion, we revealed that ghrelin was produced by the human thyroid parafollicular carcinoma cell line, TT cells. These findings suggest that ghrelin is produced in the thyroid C cells as well as in medullary thyroid carcinoma and may provide opportunities to investigate its physiological role in the thyroid gland.
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Affiliation(s)
- N Kanamoto
- Department of Medicine and Clinical Science, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto 606-8507, Japan
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Hatanaka H, Moriyama K. [Cofilin family and gelsolin family: the protein fold which severs actin filaments]. Tanpakushitsu Kakusan Koso 2001; 46:1943-9. [PMID: 11593745] [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] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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Hattori Y, Akamizu T, Saijo M, Kanamoto N, Moriyama K, Ito N, Nakao K. Characterization of the secretable ectodomain of thyrotropin receptor produced by the recombinant baculovirus system. Mol Cell Endocrinol 2001; 182:165-74. [PMID: 11514051 DOI: 10.1016/s0303-7207(01)00582-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [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: 11/20/2022]
Abstract
Thyrotropin receptor (TSHR) is a member of the glycoprotein hormone receptor family and an autoantigen of Graves' disease. Various attempts have been made to obtain a large amount of soluble ectodomain of TSHR in insect or mammalian cells, but most of them failed to secrete the overexpressed ectodomain. In the present study, we observed that about one-third of the ectodomain protein (sTSHR-gp), in which the signal peptide of TSHR was replaced by the baculovirus-encoded glycoprotein 67-signal peptide, was secreted into the culture medium and the remainder stayed within cells in the recombinant baculovirus system. Microsequencing the N-terminal of the purified protein confirmed that the baculovirus signal peptide was cleaved at the expected site. Carbohydrate studies using several glycosidases and lectins revealed that the secreted form of the ectodomain had biantennary carbohydrate, whereas the non-secreted form had high-mannose. Moreover, the secreted form of sTSHR-gp exhibited high-affinity ligand binding, whereas the non-secreted form did not show any significant ligand binding. Regarding the interactions of TSHR ectodomains with anti-TSHR antibodies, both the secreted and non-secreted forms of sTSHR-gp, almost completely neutralized the stimulatory and inhibitory anti-TSHR antibody activities. In conclusion, we succeeded in secreting the ectodomain of TSHR into culture medium, which was capable of binding to TSH and neutralizing anti-TSHR antibody activities.
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Affiliation(s)
- Y Hattori
- Department of Medicine and Clinical Science and Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto 606-8507, Japan
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