1
|
Gui S, Ni J, Mizutani S, Shigematsu N, Nakanishi H, Kashiwazaki H, Wu Z. A mixture of extracts from natural ingredients reduces the neurotoxic polarization of microglia via modulating NF-κB/NF-E2-related factor 2 activation. Food Sci Nutr 2024; 12:3745-3758. [PMID: 38726426 PMCID: PMC11077187 DOI: 10.1002/fsn3.4045] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 01/09/2024] [Accepted: 02/07/2024] [Indexed: 05/12/2024] Open
Abstract
Neurotoxic microglia-provoked neuroinflammation is implicated in cognitive decline in Alzheimer's disease (AD). Supplementation with Ginkgo biloba, phosphatidylserine, Curcuma longa, and propolis is reported to improve the cognitive functions of elderly people; however, the underlying mechanisms of this combination of natural ingredients are unknown. We investigated the effects of a mixture of extracts from propolis, Coffea arabica, Gotu kola, phosphatidylserine, Ginkgo biloba, and Curcuma longa (mixture) on microglia polarization after exposure to amyloid β1-42 (Aβ1-42, 1 μM) and lipopolysaccharide from Porphyromonas gingivalis (PgLPS, 1 μg/mL), using MG6 and BV2 microglial cells. Exposure to Aβ1-42 and PgLPS (AL) raised the mRNA expression of IL-1β, TNF-α, and IL-6, nuclear translocation of p65 NF-κB in MG6 cells and BV2 cells, and mitochondrial reactive oxygen species (ROS) production in MG6 cells. The mixture dramatically suppressed the mRNA expression of IL-1β, TNF-α, and IL-6, but significantly promoted that of IL-10, TGFβ1, and BDNF in AL-exposed MG6 and BV2 cells. Furthermore, the mixture significantly suppressed the nuclear translocation of p65 NF-κB but significantly promoted that of NF-E2-related factor 2 (Nrf2) in AL-exposed MG6 and BV2 cells. Furthermore, the mixture significantly ameliorated mitochondrial ROS production but increased mitochondrial membrane potential in MG6 cells. These observations strongly suggest that the mixture demotes the neuropathic polarization of microglia by modulating NF-κB/Nrf2 activation and improving mitochondrial functions. This study supplies the potential mechanisms of the efficacy of a combination of natural ingredients that can be applied in the prevention of cognitive decline in AD and aging by targeting microglia-mediated neuroinflammation.
Collapse
Affiliation(s)
- Shuge Gui
- Department of Oral and Maxillofacial Surgery, Faculty of Dental ScienceKyushu UniversityFukuokaJapan
| | - Junjun Ni
- Key Laboratory of Molecular Medicine and Biotherapy, School of Life ScienceBeijing Institute of TechnologyBeijingChina
| | - Shinsuke Mizutani
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental ScienceKyushu UniversityFukuokaJapan
| | - Norihiro Shigematsu
- Yamada Institute for Health Science, R & D DepartmentYamada Bee Company, Inc.OkayamaJapan
| | - Hiroshi Nakanishi
- Department of Pharmacology, Faculty of PharmacyYasuda Women's UniversityHiroshimaJapan
| | - Haruhiko Kashiwazaki
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental ScienceKyushu UniversityFukuokaJapan
| | - Zhou Wu
- Department of Aging Science and Pharmacology, Faculty of Dental ScienceKyushu UniversityFukuokaJapan
- OBT Research Center, Faculty of Dental ScienceKyushu UniversityFukuokaJapan
| |
Collapse
|
2
|
Oku S, Futatsuki T, Imamura Y, Hikita H, Inada A, Mizutani S, Mori Y, Kashiwazaki H. Protective effect of cryotherapy against oral mucositis among allogeneic hematopoietic stem cell transplant recipients using melphalan-based conditioning. Support Care Cancer 2023; 31:521. [PMID: 37581845 PMCID: PMC10427514 DOI: 10.1007/s00520-023-07989-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 08/09/2023] [Indexed: 08/16/2023]
Abstract
PURPOSE Oral cryotherapy is an effective method to prevent oral mucositis (OM) induced by chemotherapeutic agents, such as melphalan (Mel). However, there is limited data about cryotherapy in allogeneic hematopoietic stem cell transplantation (allo-HSCT) recipients; thus, the current study aimed to examine the efficacy of cryotherapy among allo-HSCT recipients treated with Mel-containing regimens. METHODS Medical records of 78 consecutive allo-HSCT recipients were retrospectively analyzed. Baseline characteristics and clinical courses between the patients who received cryotherapy (cryotherapy group, n = 42) and those who did not (control group, n = 36) were compared, especially focusing on methotrexate (MTX) use as a part of graft-versus-host disease (GVHD) prophylaxis. RESULTS Binary logistic regression analysis revealed that a higher dose of Mel (OR, 3.82; 95%CI, 1.085-13.46; P = 0.037) or MTX use (OR, 7.61; 95% CI, 2.41-23.97; P < 0.001) was associated with the incidence of OM. MTX use was also significantly associated with the duration of OM (β = 0.515; 95% CI, 9.712-21.636; P < 0.001). Among 31 patients without MTX use, cryotherapy was associated with a significant reduction of OM development (0% in the cryotherapy group vs 35% in the control group, P = 0.021). We did not find such an association in 47 patients with MTX use. CONCLUSION Cryotherapy was useful to prevent the incidence of OM in allo-HSCT recipients in the cases without MTX for GVHD prophylaxis.
Collapse
Affiliation(s)
- Saori Oku
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | | | - Yoshiko Imamura
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Haruna Hikita
- Dental Hygiene Section, Department of Medical Technology, Kyushu University Hospital, Kyushu University, Fukuoka, Japan
| | - Akemi Inada
- Department of Nursing, Kyushu University Hospital, Kyushu University, Fukuoka, Japan
| | - Shinsuke Mizutani
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan.
- OBT Research Center, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan.
| | - Yasuo Mori
- Department of Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Haruhiko Kashiwazaki
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| |
Collapse
|
3
|
Tani A, Mizutani S, Kishimoto H, Oku S, Iyota K, Chu T, Liu X, Kashiwazaki H. The Impact of Nutrition and Oral Function Exercise on among Community-Dwelling Older People. Nutrients 2023; 15:nu15071607. [PMID: 37049448 PMCID: PMC10097015 DOI: 10.3390/nu15071607] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 03/24/2023] [Accepted: 03/24/2023] [Indexed: 03/29/2023] Open
Abstract
Oral function (OF) decline in older people is associated with nutritional deficiencies, which increases frailty risk and the need for nursing care. We investigated whether the delivery of an oral function improvement program on a tablet device was as effective as delivery through a paper-based program. We also investigated the association between tongue pressure (TP) improvement and nutritional status at the baseline. The participants involved in the study were 26 community-dwelling older people with low TP, <30 kPa, aged ≥65 years, who were enrolled in a randomized controlled trial for a month in Itoshima City, Fukuoka, Japan. Oral and physical functions and body composition were measured at the baseline and at follow-up. Two-way analysis of variance revealed that body mass index (p = 0.004) increased, and maximum masticatory performance (p = 0.010), maximum TP (p = 0.035), and oral diadochokinesis /pa/ and /ka/ (p = 0.009 and 0.017, respectively) improved in a month. Participants with higher TP improvement showed an increased intake of animal proteins at the baseline: fish (p = 0.022), meat (p = 0.029), and egg (p = 0.009). OF exercises for improving TP were associated with higher animal protein intake at the baseline. This study has been registered with the UMIN Clinical Trials Registry (UMIN 000050292).
Collapse
|
4
|
Matsuzawa Y, Okubo N, Tanaka S, Kashiwazaki H, Kitagawa Y, Ohiro Y, Mikoya T, Akazawa T, Murata M. Primary Teeth-Derived Demineralized Dentin Matrix Autograft for Unilateral Maxillary Alveolar Cleft during Mixed Dentition. J Funct Biomater 2022; 13:jfb13030153. [PMID: 36135589 PMCID: PMC9506084 DOI: 10.3390/jfb13030153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 09/13/2022] [Accepted: 09/14/2022] [Indexed: 12/21/2022] Open
Abstract
This clinical report describes the immediate autograft of primary (milk) teeth-derived demineralized dentin matrix (DDM) granules for a 6-year-old boy with unilateral alveolar cleft. First, four primary teeth were extracted, crushed in an electric mill for 1 min, and the crushed granules were demineralized in 2% HNO3 solution for 20 min. Simultaneously, the nasal mucoperiosteum was pushed upwards above the apices of the permanent central incisor adjacent to the cleft. The nasal and palatal openings were closed by suturing the mucoperiosteum on both sides of the cleft with absorbable threads. The wet DDM granules were grafted into the managed cleft triangle space, and a labial flap was repositioned. The radiographic images at 6 months showed the continuous hard tissues in the cleft area and DDM granules onto lateral incisor (22) and impacted canine (23). The 3D-CT views at 2 years showed impacted tooth (22) blocked by primary canine and the replacement of DDM granules by bone near teeth (22,23). At 4 years, tooth crown (22) was situated just under the mucous membrane, and teeth (22,23) erupted spontaneously until 6 years without a maxillary expansion and a tow guidance of canine. The DDM granules contributed to bone formation without the inhibition of spontaneous tooth eruption. We concluded that autogenous primary teeth DDM graft should become a minimally invasive procedure without bone harvesting and morbidities for unilateral alveolar cleft.
Collapse
Affiliation(s)
- Yusuke Matsuzawa
- Department of Oral and Maxillofacial Surgery, Graduate School of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
- Division of Oral and Maxillofacial Surgery, Keiyukai Sapporo Hospital, Sapporo 003-0026, Japan
| | - Naoto Okubo
- Laboratory of Molecular and Cellular Medicine, Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-8586, Japan
| | - Soichi Tanaka
- Department of Oral and Maxillofacial Surgery, Graduate School of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
| | - Haruhiko Kashiwazaki
- Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka 812-8582, Japan
| | - Yoshimasa Kitagawa
- Department of Oral Diagnosis and Medicine, Graduate School of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
| | - Yoichi Ohiro
- Department of Oral and Maxillofacial Surgery, Graduate School of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
| | - Tadashi Mikoya
- Department of Oral and Maxillofacial Surgery, Graduate School of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
| | - Toshiyuki Akazawa
- Industrial Technology and Environment Research Development, Hokkaido Research Organization, Sapporo 060-0819, Japan
| | - Masaru Murata
- Division of Oral Regenerative Medicine, School of Dentistry, Health Sciences University of Hokkaido, Tobetsu 061-0293, Japan
- Correspondence:
| |
Collapse
|
5
|
Tani A, Mizutani S, Oku S, Yatsugi H, Chu T, Liu X, Iyota K, Kishimoto H, Kashiwazaki H. Association between oral function and physical pre-frailty in community-dwelling older people: a cross-sectional study. BMC Geriatr 2022; 22:726. [PMID: 36056302 PMCID: PMC9440534 DOI: 10.1186/s12877-022-03409-5] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 08/26/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Few studies have examined the relationship between oral functions and the physical pre-frailty status, classified using physical function tests. This cross-sectional study aimed to clarify this association among community-dwelling older people from the Itoshima Frail Study in Itoshima Fukuoka Prefecture. METHODS Of the 1,555 individuals invited to join the study, 381 (188 males and 193 females) enrolled. Their physical pre-frailty was assessed with a classification system consisting of two physical indicators (fatigue and unintentional weight loss, determined with a questionnaire), two functional components (declined walking speed and muscle weakness, determined using a body function measuring instrument), and declined physical activity (examined using a triaxial accelerometer). Subsequently, the individuals were classified into three groups: robust, pre-frailty, and frailty. Along with the number of teeth remaining, oral functions, such as masticatory performance, tongue pressure strength, and oral diadochokinesis (ODK), were examined. Data regarding social activity and exercise habits were collected, and the individuals' body compositions were measured. Odds ratios (ORs) and 95% confidence intervals (CIs) for the physical pre-frailty were calculated using logistic regression models. RESULTS In this study, 126 (33%) participants presented with physical pre-frailty. The participants in the robust group were younger, had stronger maximum handgrip strength, and walked faster than those in the physical pre-frailty group (p < 0.001). The robust group presented with better oral functions (masticatory performance, p = 0.015; oral ODK /ta/, p = 0.004). The physical pre-frailty status was significantly associated with age (OR, 1.111; 95% CI, 1.048-1.178; p < 0.001), masticatory performance (OR, 0.819; 95% CI, 0.680-0.986; p = 0.035), low ODK/ta/ (OR, 1.864; 95% CI, 1.069-3.250; p = 0.028), and low social activity (OR, 2.273; 95% CI, 1.308-3.951; p = 0.004). CONCLUSION This study indicated that older people with higher age, lower anterior tongue movement, lower masticatory performance, and lower social activity are positively associated with physical pre-frailty.
Collapse
Affiliation(s)
- Asuka Tani
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Shinsuke Mizutani
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan. .,Faculty of Dental Science, Oral Health/Brain Health/Total Health Research Center, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
| | - Saori Oku
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Harukaze Yatsugi
- Department of Behavior and Health Sciences, Graduate School of Human-Environment Studies, Kyushu University, 744 Motooka Nishi-ku, Fukuoka City, Fukuoka, 819-0395, Japan
| | - Tianshu Chu
- Department of Behavior and Health Sciences, Graduate School of Human-Environment Studies, Kyushu University, 744 Motooka Nishi-ku, Fukuoka City, Fukuoka, 819-0395, Japan
| | - Xin Liu
- Department of Behavior and Health Sciences, Graduate School of Human-Environment Studies, Kyushu University, 744 Motooka Nishi-ku, Fukuoka City, Fukuoka, 819-0395, Japan
| | - Kiyomi Iyota
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Hiro Kishimoto
- Department of Behavior and Health Sciences, Graduate School of Human-Environment Studies, Kyushu University, 744 Motooka Nishi-ku, Fukuoka City, Fukuoka, 819-0395, Japan.,Faculty of Arts and Science, Kyushu University, 744 Motooka Nishi-ku, Fukuoka City, Fukuoka, 819-0395, Japan
| | - Haruhiko Kashiwazaki
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| |
Collapse
|
6
|
Murata M, Kabir MA, Hirose Y, Ochi M, Okubo N, Akazawa T, Kashiwazaki H. Histological Evidences of Autograft of Dentin/Cementum Granules into Unhealed Socket at 5 Months after Tooth Extraction for Implant Placement. J Funct Biomater 2022; 13:jfb13020066. [PMID: 35735921 PMCID: PMC9224646 DOI: 10.3390/jfb13020066] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 05/17/2022] [Accepted: 05/23/2022] [Indexed: 01/27/2023] Open
Abstract
The aim of this clinical case study was to observe biopsy tissues at 5 months after an autograft of a partially demineralized dentin/cementum matrix (pDDM) into a tooth-extracted socket exhibiting healing failure. A 66-year-old female presented with healing failure in the cavity for 2 months after the extraction (#36). Initial X-ray photos showed a clear remainder of lamina dura (#36), a residual root (#37), and a horizontal impaction (#38). The vital tooth (#38) was selected for pDDM. The third molar crushed by electric mill was decalcified in 1.0 L of 2.0% HNO3 for 20 min and rinsed in cold distilled water. The pDDM granules (size: 0.5–2.0 mm) were grafted immediately into the treated socket. X-ray views just after pDDM graft showed radio-opaque granules. At 5 months after pDDM graft, the surface of regenerated bone was harmonized with the mandibular line, and bone-like radio-opacity was found in the graft region. The biopsy tissue (diameter: 3.0 mm) at 5 months after pDDM graft showed that mature bone was interconnected with the remaining pDDM. The novel histological evidence highlighted that newly formed bone was connected directly with both dentin-area and cementum-area matrix of pDDM. We concluded that pDDM contributed to the regeneration of bone in the unhealed socket, and this regeneration prepared the socket for implant placement. Autogenous pDDM could be immediately recycled as an innovative biomaterial for local bone regeneration.
Collapse
Affiliation(s)
- Masaru Murata
- Division of Regenerative Medicine, School of Dentistry, Health Sciences University of Hokkaido, Tobetsu 061-0293, Japan
- Correspondence: (M.M.); (M.A.K.)
| | - Md Arafat Kabir
- Division of Regenerative Medicine, School of Dentistry, Health Sciences University of Hokkaido, Tobetsu 061-0293, Japan
- Correspondence: (M.M.); (M.A.K.)
| | - Yukito Hirose
- Division of Fixed Prosthodontics and Oral Implantology, School of Dentistry, Health Sciences University of Hokkaido, Tobetsu 061-0293, Japan; (Y.H.); (M.O.)
| | - Morio Ochi
- Division of Fixed Prosthodontics and Oral Implantology, School of Dentistry, Health Sciences University of Hokkaido, Tobetsu 061-0293, Japan; (Y.H.); (M.O.)
| | - Naoto Okubo
- Laboratory of Molecular and Cellular Medicine, Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan;
| | - Toshiyuki Akazawa
- Industrial Technology and Environment Research Development, Hokkaido Research Organization, Sapporo 060-0819, Japan;
| | - Haruhiko Kashiwazaki
- Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka 812-8582, Japan;
| |
Collapse
|
7
|
Kai N, Tsukamoto Y, Urabe K, Tani A, Inai Y, Okadome A, Kashiwazaki H, Mizutani S, Wada N. Factors That Influence the Judgment of Oral Management Necessity in Preoperative Oral Screening. Int J Environ Res Public Health 2021; 18:ijerph182212236. [PMID: 34831991 PMCID: PMC8617779 DOI: 10.3390/ijerph182212236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 11/13/2021] [Accepted: 11/19/2021] [Indexed: 11/16/2022]
Abstract
Oral management during the perioperative period is important to prevent the development of postoperative complications. However, there are no unified systems to examine the oral status of patients and very few studies have focused on preoperative oral screening. In this study, we examined the oral status of patients who underwent oral screening at a University Hospital. A total of 1173 patients who underwent oral screening for perioperative management from April 2020 to July 2021 were enrolled. The subjects’ medical data were retrospectively extracted from the dental records, and finally, the data of 1081 patients aged ≥20 years were analyzed. Oral screening based on seven categories was performed by dentists or dental hygienists. Our cumulative results determined whether patients required oral management during the perioperative period. “Poor oral hygiene” was the most frequent category (24%) of all oral categories examined. Logistic analysis revealed that tooth mobility had the highest odds ratio (21.476; 95% confidence interval: 11.462–40.239; p < 0.001) for oral management necessity during the perioperative period. Our study suggests that poor oral hygiene is most frequently observed in preoperative oral screening. Moreover, tooth mobility in preoperative oral screening may influence the judgment of oral management necessity during the perioperative period.
Collapse
Affiliation(s)
- Nanami Kai
- Department of Medical Technology, Kyushu University Hospital, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; (N.K.); (Y.T.); (K.U.); (A.O.)
| | - Yoko Tsukamoto
- Department of Medical Technology, Kyushu University Hospital, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; (N.K.); (Y.T.); (K.U.); (A.O.)
| | - Kaoru Urabe
- Department of Medical Technology, Kyushu University Hospital, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; (N.K.); (Y.T.); (K.U.); (A.O.)
| | - Asuka Tani
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; (A.T.); (H.K.)
| | - Yuko Inai
- Division of General Dentistry, Kyushu University Hospital, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan;
| | - Asako Okadome
- Department of Medical Technology, Kyushu University Hospital, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; (N.K.); (Y.T.); (K.U.); (A.O.)
| | - Haruhiko Kashiwazaki
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; (A.T.); (H.K.)
| | - Shinsuke Mizutani
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; (A.T.); (H.K.)
- OBT Research Center, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
- Correspondence: ; Tel./Fax: +81-92-642-6485
| | - Naohisa Wada
- Department of General Dentistry, Division of Interdisciplinary Dentistry, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan;
| |
Collapse
|
8
|
Ahmadi N, Steinberg A, Pynoos R, Mizutani S, Kashiwazaki H, Ni J, Wu Z. GSK3β is involved in promoting Alzheimer's disease pathologies following chronic systemic exposure to Porphyromonas gingivalis lipopolysaccharide in amyloid precursor protein NL-F/NL-F knock-in mice. Brain Behav Immun 2021; 98:1-12. [PMID: 34391814 PMCID: PMC8849844 DOI: 10.1016/j.bbi.2021.08.213] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 07/26/2021] [Accepted: 08/07/2021] [Indexed: 12/14/2022] Open
Abstract
In line with the strong association between periodontitis and Alzheimer's disease (AD) clinically, preclinical studies have shown that systemic exposure to Porphyromonas gingivalis (Pg) initiates AD pathologies. However, the involvement of periodontitis in promoting AD pathologies is unclear. In the present study, we provided evidence that chronic systemic exposure to lipopolysaccharide derived from Pg (PgLPS, 1 mg/kg, daily, intraperitoneally) prompted neuroinflammation and tau hyperphosphorylation in 10-month-old of amyloid precursor protein (APP) knock-in mice, a model of AD, carrying the Swedish and Beyreuther/Iberian mutation (APPNL-F/NL-F). The learning and memory function were assessed using the passive avoidance test. The production of APP, Amyloid (A)β1-42, cytokines, synaptic proteins and the activation of glycogen synthase kinase (GSK)-3β as well as phosphorylation of tau were analyzed by immunohistochemistry, Western blotting or an enzyme-linked immunosorbent assay (ELISA) in the cortex of APPNL-F/NL-F mice. We found that systemic exposure of PgLPS for three consecutive weeks induced learning and memory deficits with significantly reduced postsynaptic density protein (PSD95). Increased hyperphosphorylation of tau in multiple residues, including Ser202, Thr231 and Ser396, but not the accumulation of Aβ1-42 was detected in the neurons of APPNL-F/NL-F mice. Furthermore, PgLPS increased the GSK3β activity by reducing its phosphorylation of the serine residue at position 9 (Ser9) and promoted neuroinflammation by increasing the expression of interleukin-1β (IL-1β) and tumor necrosis factor (TNF-α) while decreasing that of interleukin-10 (IL-10) and transforming growth factor (TGFβ) in the cortex of APPNL-F/NL-F mice. Moreover, the PgLPS-increased GSK3β activity was detected in both microglia and neurons, while the PgLPS-increased TNF-α expression was mainly detected in the microglia in the cortex of APPNL-F/NL-F mice. In in vitro studies, PgLPS (1 µg/ml) stimulation increased the mRNA and protein level of TNF-α in MG6 microglia, which were significantly inhibited by the GSK3β-specific inhibitor TWS119. In contrast, the tau hyperphosphorylation and activation of GSK3β in N2a neurons were enhanced after treatment with conditioned medium from PgLPS-stimulated microglia, which was attenuated after pre-treatment with TNF-α inhibitor. Taken together, these findings indicate that GSK3β is involved in prompting microglia (TNF-α)-dependent tau hyperphosphorylation in neurons, resulting in learning and memory deficits in APPNL-F/NL-F mice without changes in the Aβ expression during chronic systemic exposure to PgLPS. We propose that dampening GSK3β activation may help delay the periodontitis-promoted pathological progression of AD.
Collapse
Affiliation(s)
| | | | | | - Shinsuke Mizutani
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka 812-8582, Japan
| | - Haruhiko Kashiwazaki
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka 812-8582, Japan
| | - Junjun Ni
- Key Laboratory of Molecular Medicine and Biotherapy, School of Life Science, Beijing Institute of Technology, Beijing 100081, China.
| | - Zhou Wu
- Department of Aging Science and Pharmacology, Faculty of Dental Science, Kyushu University, Fukuoka 812-8582, Japan; OBT Research Center, Faculty of Dental Science, Kyushu University, Fukuoka 812-8582, Japan.
| |
Collapse
|
9
|
Iyota K, Mizutani S, Kishimoto H, Oku S, Tani A, Yatsugi H, Chu T, Liu X, Kashiwazaki H. Effect of Isometric Tongue Lifting Exercise on Oral Function, Physical Function, and Body Composition in Community-Dwelling Older Individuals: A Pilot Study. Gerontology 2021; 68:644-654. [PMID: 34515122 DOI: 10.1159/000518270] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 07/04/2021] [Indexed: 11/19/2022] Open
Abstract
INTRODUCTION It is known that oral frailty is one of the risk factors for physical frailty. Therefore, early detection, appropriate treatment, and prevention of oral frailty are really important. Tongue lifting exercise has been identified as a well-known method for improving decreased tongue pressure, one of the factors for oral frailty. However, few reports have investigated how tongue-strengthening exercises affect physical function and body composition. The aim of this study was to investigate the effects of isometric tongue lifting exercises on oral function, physical function, and body composition. METHODS Participants were 49 elderly people aged 68-79 years, who had previously participated in the "Itoshima Frail Study." Participants performed isometric tongue lift exercises for 3 months. Oral function (tongue pressure and oral diadocokinesis), physical function (grip strength, open-eyed one-leg standing, sit-to-stand motion time, 5-m gait speed, and 3-m Timed up and go [TUG]), and body composition were measured at baseline and post-intervention, and the extent of changes in each item was statistically analyzed. Furthermore, participants were divided into physical frailty/pre-frailty and robust groups based on the Japanese version of the frail scale proposed by [BMC Geriatr. 2015 Apr;15:36] and were compared in terms of the extent of changes in each item baseline and the post-intervention. RESULTS After the intervention, oral function increased significantly together with a significant improvement in physical function, open-eyed one-leg standing time, sit-to-stand motion, and 3-m TUG. For body composition, visceral fat level and basal metabolic rate decreased significantly. Although no significant change in body composition was observed in the physical frailty/pre-frailty group after the intervention, significant improvements in several items were observed in the robust group. CONCLUSION Isometric tongue lifting exercise can effectively improve oral function. Furthermore, it might affect physical function and body composition.
Collapse
Affiliation(s)
- Kiyomi Iyota
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Shinsuke Mizutani
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan.,Oral Health/Brain Health/Total Health Research Center, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Hiro Kishimoto
- Faculty of Arts and Science, Kyushu University, Fukuoka, Japan.,Department of Behavior and Health Sciences, Graduate School of Human-Environment Studies, Kyushu University, Fukuoka, Japan
| | - Saori Oku
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Asuka Tani
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Harukaze Yatsugi
- Department of Behavior and Health Sciences, Graduate School of Human-Environment Studies, Kyushu University, Fukuoka, Japan
| | - Tianshu Chu
- Department of Behavior and Health Sciences, Graduate School of Human-Environment Studies, Kyushu University, Fukuoka, Japan
| | - Xin Liu
- Department of Behavior and Health Sciences, Graduate School of Human-Environment Studies, Kyushu University, Fukuoka, Japan
| | - Haruhiko Kashiwazaki
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| |
Collapse
|
10
|
Huang W, Zeng F, Gu Y, Jiang M, Zhang X, Yan X, Kadowaki T, Mizutani S, Kashiwazaki H, Ni J, Wu Z. Porphyromonas Gingivalis Infection Induces Synaptic Failure via Increased IL-1β Production in Leptomeningeal Cells. J Alzheimers Dis 2021; 83:665-681. [PMID: 34334391 DOI: 10.3233/jad-210031] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND Studies have reported that synaptic failure occurs before the Alzheimer's disease (AD) onset. The systemic Porphyromonas gingivalis (P. gingivalis) infection is involved in memory decline. We previously showed that leptomeningeal cells, covering the brain, activate glial cells by releasing IL-1β in response to systemic inflammation. OBJECTIVE In the present study, we focused on the impact of leptomeningeal cells on neurons during systemic P. gingivalis infection. METHODS The responses of leptomeningeal cells and cortical neurons to systemic P. gingivalis infection were examined in 15-month-old mice. The mechanism of IL-1β production by P. gingivalis infected leptomeningeal cells was examined, and primary cortical neurons were treated with P. gingivalis infected leptomeningeal cells condition medium (Pg LCM). RESULTS Systemic P. gingivalis infection increased the expression of IL-1β in leptomeninges and reduced the synaptophysin (SYP) expression in leptomeninges proximity cortex in mice. Leptomeningeal cells phagocytosed P. gingivalis resulting in lysosomal rupture and Cathepsin B (CatB) leakage. Leaked CatB mediated NLRP3 inflammasome activation inducing IL-1β secretion in leptomeningeal cells. Pg LCM decreased the expression of synaptic molecules, including SYP, which was inhibited by an IL-1 receptor antagonist pre-treatment. CONCLUSION These observations demonstrate that P. gingivalis infection is involved in synaptic failure by inducing CatB/NLRP3 inflammasome-mediated IL-1β production in leptomeningeal cells. The periodontal bacteria-induced synaptic damage may accelerate the onset and cognitive decline of AD.
Collapse
Affiliation(s)
- Wanyi Huang
- Department of Aging Science and Pharmacology>, Faculty of Dental Science, Kyushu University, Fukuoka Japan
| | - Fan Zeng
- Department of Aging Science and Pharmacology>, Faculty of Dental Science, Kyushu University, Fukuoka Japan
| | - Yebo Gu
- Section of Orthodontics and Dentofacial Orthopedics, Division of Oral Health, Growth and Development, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Muzhou Jiang
- Department of Aging Science and Pharmacology>, Faculty of Dental Science, Kyushu University, Fukuoka Japan
| | - Xinwen Zhang
- Center of Implant Dentistry, School of Stomatology, China Medical University, Shenyang, China
| | - Xu Yan
- The VIP Department, School of Stomatology, China Medical University, Shenyang, China
| | - Tomoko Kadowaki
- Division of Frontier Life Science, Department of Medical and Dental Sciences, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Shinsuke Mizutani
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan.,OBT Research Center, Faculty of Dental Sciences, Kyushu University, Fukuoka, Japan
| | - Haruhiko Kashiwazaki
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Junjun Ni
- Key Laboratory of Molecular Medicine and Biotherapy, Department of Biology, School of Life Science, Beijing Institute of Technology, Haidian District, Beijing, China
| | - Zhou Wu
- Department of Aging Science and Pharmacology>, Faculty of Dental Science, Kyushu University, Fukuoka Japan.,OBT Research Center, Faculty of Dental Sciences, Kyushu University, Fukuoka, Japan
| |
Collapse
|
11
|
Kobayashi Y, Imai Y, Mizutani S, Higo T, Shiose A, Kashiwazaki H. Opportune Time of Tooth Extraction in Individuals Requiring Ventricular Assist Device Implantation: A Retrospective Cohort Study. J Oral Maxillofac Surg 2020; 78:1921.e1-1921.e9. [PMID: 32574607 DOI: 10.1016/j.joms.2020.05.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 04/29/2020] [Accepted: 05/06/2020] [Indexed: 11/26/2022]
Abstract
PURPOSE Individuals with implantable ventricular assist devices (VADs) are at extremely high risk of bleeding, thromboembolism, and infection after undergoing invasive dental procedures. This study aimed to investigate the systemic and local complications of tooth extraction before and after VAD implantation. PATIENTS AND METHODS This retrospective cohort study was conducted at a single center. Oral surgical procedures were performed in patients before and/or after left VAD implantation for bridge-to-heart transplantation between April 2013 and December 2017. In this study, the medical charts of the patients were retrospectively reviewed. Data about pre-extraction complete blood count, coagulation profile, biochemical profile, and incidence of local and systemic complications were compared in patients undergoing tooth extraction before VAD implantation (b-VAD group) versus after VAD implantation (a-VAD group). RESULTS In total, 28 inpatients underwent 36 oral surgical procedures before and/or after VAD implantation. Moreover, 24 tooth extractions were performed in the b-VAD group, and 12 were performed in the a-VAD group. The incidence of post-extraction bleeding was higher in the a-VAD group (P = .001, Mann-Whitney U test), and a significant difference was observed in terms of activated partial thromboplastin time (P = .010, Mann-Whitney U test). Systemic complications associated with VADs included cerebral infarction (n = 2) and driveline infection (n = 1). Post-extraction bleeding was observed within 90 days after VAD implantation in all patients who underwent tooth extraction. CONCLUSIONS The risk of bleeding after tooth extraction was higher in the a-VAD group (67%) than in the b-VAD group (13%). In 3 cases, VAD-related systemic complications developed within a short period after tooth extraction. The extraction management in the b-VAD group could be controlled without causing any problem. Hence, the opportune time of tooth extraction is before VAD implantation.
Collapse
Affiliation(s)
- Yoshihiro Kobayashi
- Postgraduate Student, Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan; and Geriatric Dentistry and Perioperative Medicine in Dentistry, Kyushu University Hospital, Fukuoka, Japan
| | - Yuko Imai
- Research Associate, Geriatric Dentistry and Perioperative Medicine in Dentistry, Kyushu University Hospital, Fukuoka, Japan.
| | - Shinsuke Mizutani
- Associate Professor, Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, and Oral Health, Brain Health, Total Health Research Center, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Taiki Higo
- Lecturer, Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Akira Shiose
- Professor, Department of Cardiovascular Surgery, Faculty of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Haruhiko Kashiwazaki
- Professor, Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| |
Collapse
|
12
|
Zeng F, Liu Y, Huang W, Qing H, Kadowaki T, Kashiwazaki H, Ni J, Wu Z. Receptor for advanced glycation end products up-regulation in cerebral endothelial cells mediates cerebrovascular-related amyloid β accumulation after Porphyromonas gingivalis infection. J Neurochem 2020; 158:724-736. [PMID: 32441775 PMCID: PMC8451939 DOI: 10.1111/jnc.15096] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 05/15/2020] [Accepted: 05/15/2020] [Indexed: 12/16/2022]
Abstract
Cerebrovascular‐related amyloidogenesis is found in over 80% of Alzheimer's disease (AD) cases, and amyloid β (Aβ) generation is increased in the peripheral macrophages during infection of Porphyromonas gingivalis (P. gingivalis), a causal bacterium for periodontitis. In this study, we focused on receptor for advanced glycation end products (RAGE), the key molecule involves in Aβ influx after P. gingivalis infection to test our hypothesis that Aβ transportation from periphery into the brain, known as “Aβ influx,” is enhanced by P. gingivalis infection. Using cultured hCMEC/D3 cell line, in comparison to uninfected cells, directly infection with P. gingivalis (multiplicity of infection, MOI = 5) significantly increased a time‐dependent RAGE expression resulting in a dramatic increase in Aβ influx in the hCMEC/D3 cells; the P. gingivalis‐up‐regulated RAGE expression was significantly decreased by NF‐κB and Cathepsin B (CatB)‐specific inhibitors, and the P.gingivalis‐increased IκBα degradation was significantly decreased by CatB‐specific inhibitor. Furthermore, the P. gingivalis‐increased Aβ influx was significantly reduced by RAGE‐specific inhibitor. Using 15‐month‐old mice (C57BL/6JJmsSlc, female), in comparison to non‐infection mice, systemic P. gingivalis infection for three consecutive weeks (1 × 108 CFU/mouse, every 3 days, intraperitoneally) significantly increased the RAGE expression in the CD31‐positive endothelial cells and the Aβ loads around the CD31‐positive cells in the mice's brains. The RAGE expression in the CD31‐positive cells was positively correlated with the Aβ loads. These observations demonstrate that the up‐regulated RAGE expression in cerebral endothelial cells mediates the Aβ influx after P. gingivalis infection, and CatB plays a critical role in regulating the NF‐κB/RAGE expression.
Collapse
Affiliation(s)
- Fan Zeng
- Department of Aging Science and Pharmacology, Kyushu University, Fukuoka, Japan
| | - Yicong Liu
- The Affiliated Stomatology Hospital, School of Medical, Zhejiang University, Zhejiang, China.,Key Laboratory of Oral Biomedical Research of Zhejiang Province, School of Stomatology, Zhejiang University, Zhejiang, China
| | - Wanyi Huang
- Department of Aging Science and Pharmacology, Kyushu University, Fukuoka, Japan
| | - Hong Qing
- Key Laboratory of Molecular Medicine and Biotherapy in the Ministry of Industry and Information Technology, Department of Biology, School of Life Science, Beijing Institute of Technology, Haidian District, Beijing, China
| | - Tomoko Kadowaki
- Division of Frontier Life Science, Department of Medical and Dental Sciences, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Haruhiko Kashiwazaki
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Junjun Ni
- Department of Aging Science and Pharmacology, Kyushu University, Fukuoka, Japan.,Key Laboratory of Molecular Medicine and Biotherapy in the Ministry of Industry and Information Technology, Department of Biology, School of Life Science, Beijing Institute of Technology, Haidian District, Beijing, China
| | - Zhou Wu
- Department of Aging Science and Pharmacology, Kyushu University, Fukuoka, Japan.,Faculty of Dental Science, OBT Research Center, Kyushu University, Fukuoka, Japan
| |
Collapse
|
13
|
Zeng F, Liu Y, Huang W, Qing H, Kadowaki T, Kashiwazaki H, Ni J, Wu Z. Receptor for advanced glycation end products up-regulation in cerebral endothelial cells mediates cerebrovascular-related amyloid β accumulation after Porphyromonas gingivalis infection. J Neurochem 2020. [PMID: 32441775 DOI: 10.1111/jnc.15073] [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: 11/30/2022]
Abstract
Cerebrovascular-related amyloidogenesis is found in over 80% of Alzheimer's disease (AD) cases, and amyloid β (Aβ) generation is increased in the peripheral macrophages during infection of Porphyromonas gingivalis (P. gingivalis), a causal bacterium for periodontitis. In this study, we focused on receptor for advanced glycation end products (RAGE), the key molecule involves in Aβ influx after P. gingivalis infection to test our hypothesis that Aβ transportation from periphery into the brain, known as "Aβ influx," is enhanced by P. gingivalis infection. Using cultured hCMEC/D3 cell line, in comparison to uninfected cells, directly infection with P. gingivalis (multiplicity of infection, MOI = 5) significantly increased a time-dependent RAGE expression resulting in a dramatic increase in Aβ influx in the hCMEC/D3 cells; the P. gingivalis-up-regulated RAGE expression was significantly decreased by NF-κB and Cathepsin B (CatB)-specific inhibitors, and the P.gingivalis-increased IκBα degradation was significantly decreased by CatB-specific inhibitor. Furthermore, the P. gingivalis-increased Aβ influx was significantly reduced by RAGE-specific inhibitor. Using 15-month-old mice (C57BL/6JJmsSlc, female), in comparison to non-infection mice, systemic P. gingivalis infection for three consecutive weeks (1 × 108 CFU/mouse, every 3 days, intraperitoneally) significantly increased the RAGE expression in the CD31-positive endothelial cells and the Aβ loads around the CD31-positive cells in the mice's brains. The RAGE expression in the CD31-positive cells was positively correlated with the Aβ loads. These observations demonstrate that the up-regulated RAGE expression in cerebral endothelial cells mediates the Aβ influx after P. gingivalis infection, and CatB plays a critical role in regulating the NF-κB/RAGE expression. Cover Image for this issue: https://doi.org/10.1111/jnc.15073.
Collapse
Affiliation(s)
- Fan Zeng
- Department of Aging Science and Pharmacology, Kyushu University, Fukuoka, Japan
| | - Yicong Liu
- The Affiliated Stomatology Hospital, School of Medical, Zhejiang University, Zhejiang, China.,Key Laboratory of Oral Biomedical Research of Zhejiang Province, School of Stomatology, Zhejiang University, Zhejiang, China
| | - Wanyi Huang
- Department of Aging Science and Pharmacology, Kyushu University, Fukuoka, Japan
| | - Hong Qing
- Key Laboratory of Molecular Medicine and Biotherapy in the Ministry of Industry and Information Technology, Department of Biology, School of Life Science, Beijing Institute of Technology, Haidian District, Beijing, China
| | - Tomoko Kadowaki
- Division of Frontier Life Science, Department of Medical and Dental Sciences, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Haruhiko Kashiwazaki
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Junjun Ni
- Department of Aging Science and Pharmacology, Kyushu University, Fukuoka, Japan.,Key Laboratory of Molecular Medicine and Biotherapy in the Ministry of Industry and Information Technology, Department of Biology, School of Life Science, Beijing Institute of Technology, Haidian District, Beijing, China
| | - Zhou Wu
- Department of Aging Science and Pharmacology, Kyushu University, Fukuoka, Japan.,Faculty of Dental Science, OBT Research Center, Kyushu University, Fukuoka, Japan
| |
Collapse
|
14
|
Oku S, Takeshita T, Futatsuki T, Kageyama S, Asakawa M, Mori Y, Miyamoto T, Hata J, Ninomiya T, Kashiwazaki H, Yamashita Y. Disrupted tongue microbiota and detection of nonindigenous bacteria on the day of allogeneic hematopoietic stem cell transplantation. PLoS Pathog 2020; 16:e1008348. [PMID: 32150591 PMCID: PMC7082065 DOI: 10.1371/journal.ppat.1008348] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 03/19/2020] [Accepted: 01/23/2020] [Indexed: 12/19/2022] Open
Abstract
Disruption of the intestinal microbiota caused by intensive chemotherapy, irradiation and antibiotics can result in development of severe gut graft-versus-host disease and infectious complications, leading to poorer outcomes among allogeneic hematopoietic stem cell transplantation (allo-HSCT) recipients. Although the oral cavity is also densely colonized by indigenous microorganisms, the bacterial composition in allo-HSCT recipients remains unclear. We determined the tongue microbiota composition of 45 patients with hematological disorders on the day of transplantation and compared them to 164 community-dwelling adults. The V1–V2 regions of the 16S rRNA gene sequences demonstrated that the allo-HSCT recipients had less diverse and distinct microbiota from that of community-dwelling adults. The full-length 16S rRNA gene sequences identified 146 bacterial taxa in the microbiota of allo-HSCT recipients, of which 34 bacterial taxa did not correspond to bacteria primarily inhabiting the oral cavity deposited in the expanded Human Oral Microbiome Database. Notably, the detection of Staphylococcus haemolyticus and/or Ralstonia pickettii was significantly associated with a higher risk of mortality during the follow-up period. These results demonstrate that the oral cavity of allo-HSCT recipients is colonized by a disrupted microbiota on the day of transplantation and suggest that detection of specific nonindigenous taxa could be a predictor of transplant outcome. Allogeneic hematopoietic stem cell transplantation (allo-HSCT) recipients are subjected to intensive chemotherapy, irradiation and antibiotics which could affect the intestinal as well as oral microbiota. We employed full-length 16S rRNA gene sequencing analysis with high taxonomic resolution using a third-generation sequencer, PacBio Sequel, and determined the bacterial composition of the tongue microbiota of allo-HSCT recipients after conditioning regimens. This comprehensive molecular approach identified 34 taxa uncommon in the oral cavity, which constituted 0–99.4% (median, 0.27%) of each tongue microbiota. Of them, Staphylococcus haemolyticus and Ralstonia pickettii were frequently found in allo-HSCT recipients, and their detection was significantly associated with a higher risk of mortality during the follow-up period. These results suggest that careful attention should be given to the bacterial composition of the disrupted oral microbiota in allo-HSCT recipients.
Collapse
Affiliation(s)
- Saori Oku
- Section of Preventive and Public Health Dentistry, Division of Oral Health, Growth and Development, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Toru Takeshita
- Section of Preventive and Public Health Dentistry, Division of Oral Health, Growth and Development, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
- OBT Research Center, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Toshiko Futatsuki
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Shinya Kageyama
- Section of Preventive and Public Health Dentistry, Division of Oral Health, Growth and Development, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Mikari Asakawa
- Section of Preventive and Public Health Dentistry, Division of Oral Health, Growth and Development, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Yasuo Mori
- Department of Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Toshihiro Miyamoto
- Department of Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Jun Hata
- Department of Epidemiology and Public Health, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Center for Cohort Studies, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Toshiharu Ninomiya
- Department of Epidemiology and Public Health, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Center for Cohort Studies, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Haruhiko Kashiwazaki
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Yoshihisa Yamashita
- Section of Preventive and Public Health Dentistry, Division of Oral Health, Growth and Development, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
- * E-mail:
| |
Collapse
|
15
|
Iyota K, Mizutani S, Oku S, Asao M, Futatsuki T, Inoue R, Imai Y, Kashiwazaki H. A Cross-Sectional Study of Age-Related Changes in Oral Function in Healthy Japanese Individuals. Int J Environ Res Public Health 2020; 17:ijerph17041376. [PMID: 32093362 PMCID: PMC7068434 DOI: 10.3390/ijerph17041376] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 02/15/2020] [Accepted: 02/17/2020] [Indexed: 12/25/2022]
Abstract
BACKGROUND Oral function deterioration is related to a variety of factors, including aging, decline in activities of daily living, malnutrition, and cognitive decline. This cross-sectional study examined the effects of aging on oral function in healthy individuals. METHODS A retrospective study was conducted on 175 healthy, independent patients aged 40-89 years, without dementia and with ≥20 teeth, who visited a local dental clinic in Japan. Patients were compared with 92 university students aged 20-29 years. The seven criteria proposed by the Japanese Society of Gerodontology to diagnose "oral hypofunction" were observed and statistically analyzed. RESULTS Compared with those in the control group, the degree of tongue coating was increased in the group aged over 80 years, occlusal force was decreased in the group aged 70-79 years, tongue motor function was decreased in the groups aged 60-69 years and older, and tongue pressure was decreased in the groups aged 70-79 years and older. CONCLUSIONS Healthy, independent individuals maintained several oral function criteria across aging, including oral mucosal wetness, occlusal force, lip motor function, masticatory function, and swallowing function. Tongue motor function and tongue pressure decreased with aging, indicating that these may be rehabilitation targets.
Collapse
Affiliation(s)
- Kiyomi Iyota
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; (K.I.); (S.O.); (H.K.)
- Iyota Dental Clinic, 2-5-5 Omiya, Chuo-ku, Fukuoka 810-0013, Japan
| | - Shinsuke Mizutani
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; (K.I.); (S.O.); (H.K.)
- OBT Research Center, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
- Correspondence: ; Tel.: +81-92-642-6485
| | - Saori Oku
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; (K.I.); (S.O.); (H.K.)
- Geriatric Dentistry and Perioperative Medicine in Dentistry, Kyushu University Hospital, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; (M.A.); (T.F.); (R.I.); (Y.I.)
| | - Misa Asao
- Geriatric Dentistry and Perioperative Medicine in Dentistry, Kyushu University Hospital, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; (M.A.); (T.F.); (R.I.); (Y.I.)
| | - Toshiko Futatsuki
- Geriatric Dentistry and Perioperative Medicine in Dentistry, Kyushu University Hospital, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; (M.A.); (T.F.); (R.I.); (Y.I.)
| | - Ryosuke Inoue
- Geriatric Dentistry and Perioperative Medicine in Dentistry, Kyushu University Hospital, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; (M.A.); (T.F.); (R.I.); (Y.I.)
| | - Yuko Imai
- Geriatric Dentistry and Perioperative Medicine in Dentistry, Kyushu University Hospital, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; (M.A.); (T.F.); (R.I.); (Y.I.)
| | - Haruhiko Kashiwazaki
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan; (K.I.); (S.O.); (H.K.)
| |
Collapse
|
16
|
Nie R, Wu Z, Ni J, Zeng F, Yu W, Zhang Y, Kadowaki T, Kashiwazaki H, Teeling JL, Zhou Y. Porphyromonas gingivalis Infection Induces Amyloid-β Accumulation in Monocytes/Macrophages. J Alzheimers Dis 2019; 72:479-494. [DOI: 10.3233/jad-190298] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ran Nie
- Department of Dental Implantology, School and Hospital of Stomatology, Jilin University, Changchun, China
| | - Zhou Wu
- Department of Aging Science and Pharmacology, Faculty of Dental Sciences, Kyushu University, Fukuoka, Japan
- OBT Research Center, Faculty of Dental Sciences, Kyushu University, Fukuoka, Japan
| | - Junjun Ni
- Department of Aging Science and Pharmacology, Faculty of Dental Sciences, Kyushu University, Fukuoka, Japan
| | - Fan Zeng
- Department of Aging Science and Pharmacology, Faculty of Dental Sciences, Kyushu University, Fukuoka, Japan
| | - Weixian Yu
- Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling, Jilin University, Changchun, China
| | - Yufeng Zhang
- Gerontal Department of Stomatology, School and Hospital of Stomatology, Jilin University, Changchun, China
| | - Tomoko Kadowaki
- Division of Frontier Life Science, Department of Medical and Dental Sciences, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Haruhiko Kashiwazaki
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Sciences, Kyushu University, Fukuoka, Japan
| | - Jessica L. Teeling
- Biological Sciences, Faculty of Natural and Environmental Sciences, University of Southampton, Southampton, United Kingdom
| | - Yanmin Zhou
- Department of Dental Implantology, School and Hospital of Stomatology, Jilin University, Changchun, China
| |
Collapse
|
17
|
Nakazawa S, Sakata KI, Liang S, Yoshikawa K, Iizasa H, Tada M, Hamada JI, Kashiwazaki H, Kitagawa Y, Yamazaki Y. Dominant-negative p53 mutant R248Q increases the motile and invasive activities of oral squamous cell carcinoma cells. Biomed Res 2019; 40:37-49. [PMID: 30787262 DOI: 10.2220/biomedres.40.37] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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]
Abstract
The tumor suppressor gene TP53 (gene) codes for a transcription factor which transactivates its target genes responsible for cell cycle arrest, DNA repair, apoptosis, and senescence. TP53 is well known to be the most frequent target of genetic mutations in nearly half of human cancers including oral squamous cell carcinoma (OSCC). Many p53 mutants including R248Q and R248W not only lose its tumor-suppressor activities, but also interfere with the functions of wild-type p53; this is so-called dominant-negative (DN) mutation. The DN p53 mutation is a predictor of poor outcome in patients with various cancers, and also a risk factor for metastatic recurrence in patients with OSCC. Recently it has been reported that DN p53 mutants acquire new oncogenic activities, which is named gain-of-function (GOF). This study aimed at determining whether R248Q and R248W were involved in OSCC cells' acquiring aggressive phenotypes, using SAS, HSC4 and Ca9-22 cell lines. First, two mutants p53, R248Q and R248W, were respectively transfected into SAS cells harboring recessive-type p53 (E336X). As a result, SAS cells expressing R248Q showed highly spreading, motile and invasive activities compared to parent or mock-transfected cells whereas those expressing R248W did not increase those activities. Secondly, in HSC4 cells harboring R248Q and Ca9-22 cells harboring R248W, expressions of the mutants p53 were inhibited by the transfection with siRNAs targeting p53. The inhibition of the mutants p53 decreased spreading, motile and invasive activities of HSC4 cells whereas it did not affect those activities of Ca9-22 cells. These findings suggest that R248Q p53 mutation, but not R248W p53 mutation, induces more motile and invasive potentials in human OSCC cells.
Collapse
Affiliation(s)
- Seitaro Nakazawa
- Department of Gerodontology, Division of Oral Health Science, Graduate School of Dental Medicine
| | - Ken-Ichiro Sakata
- Department of Oral Diagnosis and Oral Medicine, Division of Oral Pathobiological Science, Graduate School of Dental Medicine
| | - Shanshan Liang
- The Key Laboratory of Biomarker High Throughput-Screening and Target Translation of Breast and Gastrointestinal Tumor, Oncology department of Affiliated Zhongshan Hospital of Dalian University
| | - Kazuhito Yoshikawa
- Department of Oral Diagnosis and Oral Medicine, Division of Oral Pathobiological Science, Graduate School of Dental Medicine
| | - Hisashi Iizasa
- Department of Microbiology, Shimane University Faculty of Medicine
| | | | - Jun-Ichi Hamada
- Health Sciences University of Hokkaido, School of Nursing and Social Services
| | - Haruhiko Kashiwazaki
- Section of Geriatric Dentistry and Perioperative Medicine in Dentistry, Division of Maxillofacial Diagnostic and Surgical Sciences Faculty of Dental Science
| | - Yoshimasa Kitagawa
- Department of Oral Diagnosis and Oral Medicine, Division of Oral Pathobiological Science, Graduate School of Dental Medicine
| | - Yutaka Yamazaki
- Department of Gerodontology, Division of Oral Health Science, Graduate School of Dental Medicine
| |
Collapse
|
18
|
Kashiwazaki H. Oral supportive care in cancer therapy at Hokkaido University Hospital. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv436.02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
19
|
Yokoi A, Maruyama T, Yamanaka R, Ekuni D, Tomofuji T, Kashiwazaki H, Yamazaki Y, Morita M. Relationship between acetaldehyde concentration in mouth air and tongue coating volume. J Appl Oral Sci 2015; 23:64-70. [PMID: 25760268 PMCID: PMC4349121 DOI: 10.1590/1678-775720140223] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Accepted: 10/30/2014] [Indexed: 01/10/2023] Open
Abstract
OBJECTIVE Acetaldehyde is the first metabolite of ethanol and is produced in the epithelium by mucosal ALDH, while higher levels are derived from microbial oxidation of ethanol by oral microflora such as Candida species. However, it is uncertain whether acetaldehyde concentration in human breath is related to oral condition or local production of acetaldehyde by oral microflora. The aim of this pilot study was to investigate the relationship between physiological acetaldehyde concentration and oral condition in healthy volunteers. MATERIAL AND METHODS Sixty-five volunteers (51 males and 14 females, aged from 20 to 87 years old) participated in the present study. Acetaldehyde concentration in mouth air was measured using a portable monitor. Oral examination, detection of oral Candida species and assessment of alcohol sensitivity were performed. RESULTS Acetaldehyde concentration [median (25%, 75%)] in mouth air was 170.7 (73.5, 306.3) ppb. Acetaldehyde concentration in participants with a tongue coating status score of 3 was significantly higher than in those with a score of 1 (p<0.017). After removing tongue coating, acetaldehyde concentration decreased significantly (p<0.05). Acetaldehyde concentration was not correlated with other clinical parameters, presence of Candida species, smoking status or alcohol sensitivity. CONCLUSION Physiological acetaldehyde concentration in mouth air was associated with tongue coating volume.
Collapse
Affiliation(s)
- Aya Yokoi
- Department of Preventive Dentistry,, School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Takayuki Maruyama
- Department of Preventive Dentistry,, School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Reiko Yamanaka
- Division of Hospital Dentistry, Central Clinical Department, Okayama University Hospital, Okayama, Japan
| | - Daisuke Ekuni
- Department of Preventive Dentistry,, School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Takaaki Tomofuji
- Department of Preventive Dentistry,, School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Haruhiko Kashiwazaki
- Department of Oral Health Science, School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Yutaka Yamazaki
- Department of Oral Health Science, School of Dental Medicine, Hokkaido University, Sapporo, Japan
| | - Manabu Morita
- Department of Preventive Dentistry,, School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| |
Collapse
|
20
|
Kashiwazaki H, Harada N, Akazawa T, Md. Arafat Kabir, Minamida Y, Murata M. Bone Augmentation Using Novel Unidirectional Porous Hydroxyapatite with Bone Morphogenetic Protein-2 on Rat Skull. J HARD TISSUE BIOL 2013. [DOI: 10.2485/jhtb.22.337] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
21
|
Yugami N, Suzuki F, Kashiwazaki H, Higashiguchi T, Sentoku Y, Nishida A, Kodama R. THz radiation from an ultrashort-laser-induced fast spark dense plasma. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20135918007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
22
|
Terada M, Izumi K, Ohnuki H, Saito T, Kato H, Yamamoto M, Kawano Y, Nozawa-Inoue K, Kashiwazaki H, Ikoma T, Tanaka J, Maeda T. Construction and characterization of a tissue-engineered oral mucosa equivalent based on a chitosan-fish scale collagen composite. J Biomed Mater Res B Appl Biomater 2012; 100:1792-802. [PMID: 22807349 DOI: 10.1002/jbm.b.32746] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2011] [Revised: 05/01/2012] [Accepted: 05/20/2012] [Indexed: 11/10/2022]
Abstract
This study was designed to (1) assess the in vitro biocompatibility of a chitosan-collagen composite scaffold (C3) constructed by blending commercial chitosan and tilapia scale collagen with oral mucosa keratinocytes, (2) histologically and immunohistochemically characterize an ex vivo-produced oral mucosa equivalent constructed using the C3 (EVPOME-C), and (3) compare EVPOME-C with oral mucosa constructs utilizing AlloDerm® (EVPOME-A), BioMend® Extend™ (EVPOME-B), and native oral mucosa. C3 scaffold had a well-developed fibril network and a sufficiently small porosity to prevent keratinocytes from growing inside the scaffold after cell-seeding. The EVPOME oral mucosa constructs were fabricated in a chemically defined culture system. After culture at an air-liquid interface, EVPOME-C and EVPOME-B had multilayered epithelium with keratinization, while EVPOME-A had a more organized stratified epithelium. Ki-67 and p63 immunolabeled cells in the basal layer of all EVPOMEs suggested a regenerative ability. Compared with native oral mucosa, the keratin 15 and 10/13 expression patterns in all EVPOMEs showed a less-organized differentiation pattern. In contrast to the β1-integrin and laminin distribution in EVPOME-A and native oral mucosa, the subcellular deposition in EVPOME-C and EVPOME-B indicated that complete basement membrane formation failed. These findings demonstrated that C3 has a potential application for epithelial tissue engineering and provides a new potential therapeutic device for oral mucosa regenerative medicine.
Collapse
Affiliation(s)
- Michiko Terada
- Division of Oral Anatomy, Niigata University Graduate School of Medical and Dental Sciences, Chuo-Ku, Niigata City, Japan.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Kakudate N, Muramatsu T, Endoh M, Satomura K, Koseki T, Sato Y, Ito K, Ogasawara T, Nakamura S, Kishimoto E, Kashiwazaki H, Yamashita Y, Uchiyama K, Nishihara T, Kiyohara Y, Kakinoki Y. Factors associated with dry mouth in dependent Japanese elderly. Gerodontology 2012; 31:11-8. [PMID: 22672112 DOI: 10.1111/j.1741-2358.2012.00685.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/01/2012] [Indexed: 11/30/2022]
Abstract
OBJECTIVES To identify factors associated with dry mouth. BACKGROUND Dry mouth adversely affects oropharyngeal health, particularly in elderly, and can lead to pneumonia. A better understanding of the epidemiology of dry mouth is therefore important in improving treatment strategies and oral health in high-risk elderly patients. METHODS We conducted a cross-sectional study involving 383 dependent Japanese elderly individuals (65-84 [n = 167] and ≥85 [n = 216] years) at eight long-term care facilities and hospitals. Thirty-four potential factors associated with dry mouth were examined by multiple logistic regression analysis. The primary outcome was dry mouth, as diagnosed by tongue dorsum moisture. RESULTS We identified that body mass index and severity of physical disability were identified as a potential factors associated with dry mouth in the super-elderly (≥85 years) group, whereas severity of physical disability, outcome measurement time, high daily water consumption, mouth breathing, use of antidepressants and diuretics, and high frequency of daily brushing (≥2 times per day; Odds ratio: 5.56; 95% Confidence Interval: 1.52-20.00) were associated with dry mouth in the 65- to 84-year-old group. CONCLUSION To our knowledge, this is the first study to identify a link between frequency of daily brushing and dry mouth and suggests that tooth brushing should be encouraged in high-risk dependent Japanese elderly (65-84 years), particularly those taking antidepressants and/or diuretics.
Collapse
Affiliation(s)
- Naoki Kakudate
- Stanford Prevention Research Center, Stanford University School of Medicine, Stanford, CA, USA; Department of Epidemiology and Healthcare Research, Kyoto University School of Medicine and Public Health, Kyoto, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Nishida A, Kashiwazaki H, Yoshida S, Higashiguchi T, Yugami N, Kodama R. A tapered parallel plate waveguide for frequency up-conversion of terahertz radiation. Rev Sci Instrum 2012; 83:045104. [PMID: 22559573 DOI: 10.1063/1.3697700] [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: 05/31/2023]
Abstract
A tapered parallel plate waveguide was developed for frequency up-conversion experiments in the terahertz (THz) region by flash ionization. The element at the plasma-source-wave interaction area determines the conversion efficiency. It causes THz pulses to converge to a narrow plate separation, which is smaller than the wavelength. The waveguide exhibited good performance for transmitting p-polarized THz pulses in a 50 μm separation, making it suitable for flash ionization experiments.
Collapse
Affiliation(s)
- A Nishida
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan.
| | | | | | | | | | | |
Collapse
|
25
|
Kashiwazaki H, Matsushita T, Sugita J, Shigematsu A, Kasashi K, Yamazaki Y, Kanehira T, Kondo T, Endo T, Tanaka J, Hashino S, Nishio M, Imamura M, Kitagawa Y, Inoue N. A comparison of oral mucositis in allogeneic hematopoietic stem cell transplantation between conventional and reduced-intensity regimens. Support Care Cancer 2011; 20:933-9. [PMID: 21494780 DOI: 10.1007/s00520-011-1164-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2011] [Accepted: 04/04/2011] [Indexed: 11/28/2022]
Abstract
Severe oral mucositis developed in allogeneic hematopoietic stem cell transplantation (HSCT) accompanies intolerable pain and risk for systemic bacteremia infection. Conventional stem cell transplantation (CST) and reduced-intensity regimens for allogeneic HSCT (RIST) may differently affect the occurrence and severity of oral mucositis. Here, we comparatively examined oral mucositis in patients undergoing CST and that in RIST patients to search for measures to alleviate oral mucositis. We retrospectively analyzed the data of 130 consecutive patients undergoing HSCT (conventional, 60; RIST, 70). Oral mucositis was evaluated according to the National Cancer Institute Common Terminology Criteria for Adverse Events version 3.0. We also investigated the risk factors for severe oral mucositis in each regimen. The incidence of oral mucositis was not significantly different between RIST and CST patients. The use of opioid analgesics to control pain due to oral mucositis was significantly less in patients undergoing RIST compared with those receiving CST. The risk factors for severe oral mucositis, determined by univariate and multivariate analyses, were "younger age (<40)" in CST and "longer duration of neutropenia (≥ 14 days)" in RIST. Although the incidences of oral mucositis were almost the same, the need for opioid analgesics and the risk factors for severe oral mucositis differed between CST and RIST patients.
Collapse
Affiliation(s)
- Haruhiko Kashiwazaki
- Gerodontology, Division of Oral Health Science, Hokkaido University Graduate School of Dental Medicine, Kita-13 Nishi-7, Kita-ku, Sapporo, Hokkaido, 060-8586, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Harada E, Moriya S, Murata A, Muramatsu M, Kashiwazaki H, Kobayashi K, Notani K, Inoue N. Relationship between subjective assessment of oral health and medical expenses in community-dwelling elderly persons. Gerodontology 2011; 29:e246-52. [PMID: 21306431 PMCID: PMC3427878 DOI: 10.1111/j.1741-2358.2011.00459.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Objectives The increasing medical expenses of elderly persons in Japan’s rapidly ageing society have become a major concern. It is therefore important to elucidate the factors associated with such escalation. Here, we focused on the relationship between subjective self-assessment of oral health, as an index of general health, and medical expenses (excluding dental repair) under the hypothesis that oral health contributes to general medical expenses. Several studies have shown that oral health status is correlated with general health status among elderly persons. We speculated that oral health status might show a relation with medical costs among elderly persons. However, few studies have investigated this relationship to date. Materials and Methods Participants were 259 elderly subjects (range: 65–84 years; 120 men, 139 women) residing independently. Subjective assessment of oral health was evaluated by their responses (‘Good’, ‘Not good’ and ‘Not at all good’) on a survey questionnaire. The correlation between subjective assessment of oral health and medical expenditure was analysed using Spearman’s rank method, the Mann–Whitney U-test and the Kruskal–Wallis test. Medical expenses were used as the dependent variable in multinomial logistic regression analysis with background and intraoral factors as independent variables. Results A slight yet statistically significant correlation was observed between subjective assessment of oral health and outpatient treatment fees. Conclusion The findings revealed that subjective assessment of oral health is significantly and independently related to the medical expenses of community-dwelling elderly persons after adjusting for social background, living environment and physical factors.
Collapse
Affiliation(s)
- Eriko Harada
- Division of Oral Health Science, Department of Geriatric Dentistry, Graduate School of Dental Medicine, Hokkaido University, Kita-ku, Sapporo, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
27
|
Hassan NMM, Hamada JI, Kameyama T, Tada M, Nakagawa K, Yoshida S, Kashiwazaki H, Yamazaki Y, Suzuki Y, Sasaki A, Nagatsuka H, Inoue N, Moriuchi T. Increased expression of the PRL-3 gene in human oral squamous cell carcinoma and dysplasia tissues. Asian Pac J Cancer Prev 2011; 12:947-951. [PMID: 21790231] [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] Open
Abstract
Phosphatase of regenerating liver (PRL) belongs to a class of the protein tyrosine phosphatase family, which is known so far to consist of 3 members, PRL-1, PRL-2, and PRL-3. The aim of this study was to uncover the role of PRL genes in development of oral malignancy. We analyzed expression levels of the 3 PRL genes in 50 human oral squamous cell carcinomas (OSCCs), 11 dysplasia and 12 normal mucosa tissues by a real-time RT-PCR method. PRL-3 but not PRL-1 or PRL-2 expressions were significantly higher in OSCC and dysplasia than in normal mucosa tissues. Additionally, PRL-3 expressions were significantly higher in OSCC tissues harboring dominant-negative p53 or recessive p53 mutation than in those harboring wild-type p53. These results suggest that PRL-3 plays a role in oral cancer development and can be useful as a marker of pre-malignant and malignant lesion of oral mucosa.
Collapse
Affiliation(s)
- Nur Mohammad Monsur Hassan
- Division of Cancer-Related Genes, Institute for Genetic Medicine, Hokkaido University Graduate School of Dental Medicine, Sapporo, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Hassan NMM, Tada M, Shindoh M, Hamada JI, Kashiwazaki H, Shimo T, Ashikaga Y, Yamazaki Y, Sasaki A, Moriuchi T, Inoue N. A multiple primary carcinoma consisting of leukoplakia and SCC: a case report with p53 mutation analysis. Anticancer Res 2010; 30:4773-4778. [PMID: 21115940] [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: 05/30/2023]
Abstract
Patients with an oral squamous cell carcinoma (OSCC) often develop multiple malignant lesions. This report examined whether individual tumours developed in a patient show the same genetic alteration, such as p53 mutations. This case study describes three SCCs and three leukoplakias which developed simultaneously in a single 67-year-old Japanese man. A p53 mutation was detected in two of the three SCCs and one of the three leukoplakias. One SCC had a missense mutation at codon 285 (GAG>AAG, Glu>Lys) and the other a nonsense mutation at codon 336, and the leukoplakia had a missense mutation at codon 273 (CGT>CAT, Arg>His). This case showed that individual oral tumours may have different genetic changes even when they develop in a single patient. Therefore, this report provided strong evidence that in cases of multiple tumours it is necessary to design tailor-made therapies for each individual tumour rather than a single standardised therapy for all multiple tumours.
Collapse
Affiliation(s)
- Nur Mohammad Monsur Hassan
- Department of Oral and Maxillofacial Surgery, Division of Oncological Science Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Kashiwazaki H, Yamaguchi K, Harada N, Akazawa T, Murata M, Iizuka T, Ikoma T, Tanaka J, Inoue N. In vivo Evaluation of a Novel Chitosan/ HAp Composite Biomaterial as a Carrier of rhBMP-2. J HARD TISSUE BIOL 2010. [DOI: 10.2485/jhtb.19.181] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
30
|
Kanehira T, Yamaguchi T, Takehara J, Kashiwazaki H, Abe T, Morita M, Asano K, Fujii Y, Sakamoto W. A pilot study of a simple screening technique for estimation of salivary flow. ACTA ACUST UNITED AC 2009; 108:389-93. [DOI: 10.1016/j.tripleo.2009.04.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2008] [Revised: 04/06/2009] [Accepted: 04/09/2009] [Indexed: 10/20/2022]
|
31
|
Kashiwazaki H, Kishiya Y, Matsuda A, Yamaguchi K, Iizuka T, Tanaka J, Inoue N. Fabrication of porous chitosan/hydroxyapatite nanocomposites: their mechanical and biological properties. Biomed Mater Eng 2009; 19:133-40. [PMID: 19581706 DOI: 10.3233/bme-2009-0572] [Citation(s) in RCA: 27] [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: 11/15/2022]
Abstract
We fabricated novel chitosan/hydroxyapatite (HAp) nanocomposites with porous structure by the co-precipitation and porogen leaching method. SEM observation confirmed that the porous chitosan/HAp nanocomposites with 60.6% and 87.1% porosity showed the interconnective pores with pore diameters in the range of 100-200 mum. The composites were found to be mechanically flexible and could be easily formed into any desired shape. The mechanical strength was enhanced by the heat treatment with saturated steam, which was ascribed to the formation of hydrogen bonds between chitosan molecules. The composites subcutaneously implanted in the backs of SD rats for 3 weeks caused little inflammation, and new blood vessel growth and giant cells were found around the composite accompanied with roughening of the surface due to degradation, showing good biocompatibility and biodegradation.
Collapse
Affiliation(s)
- Haruhiko Kashiwazaki
- Department of Oral Health Science, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan.
| | | | | | | | | | | | | |
Collapse
|
32
|
Hassan N, Tada M, Shindo M, Kashiwazaki H, Ashikaga Y, Yamazaki Y, Shimo T, Kishimoto K, Inoue N, Sasaki A. Multiple primary carcinomas: a case report with p53 mutation analysis. Int J Oral Maxillofac Surg 2009. [DOI: 10.1016/j.ijom.2009.03.177] [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: 11/27/2022]
|
33
|
Akhter R, Hassan NMM, Moriya S, Kashiwazaki H, Inoue N, Morita M. RELATIONSHIP BETWEEN PERIODONTAL STATUS AND PHYSICAL FITNESS IN AN ELDERLY POPULATION OF NONSMOKERS IN BANGLADESH. J Am Geriatr Soc 2008; 56:2368-70. [DOI: 10.1111/j.1532-5415.2008.02036.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
34
|
Hassan NMM, Tada M, Hamada JI, Kashiwazaki H, Kameyama T, Akhter R, Yamazaki Y, Yano M, Inoue N, Moriuchi T. Presence of dominant negative mutation of TP53 is a risk of early recurrence in oral cancer. Cancer Lett 2008; 270:108-19. [DOI: 10.1016/j.canlet.2008.04.052] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2007] [Revised: 04/25/2008] [Accepted: 04/28/2008] [Indexed: 02/07/2023]
|
35
|
Kashiwazaki H. Presence of Dominant-Negative p53 Mutation Is a Risk of Early Recurrence in Oral Squamous Cell Carcinoma. J Oral Maxillofac Surg 2007. [DOI: 10.1016/j.joms.2007.06.557] [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]
|
36
|
Hassan NMM, Hamada JI, Murai T, Seino A, Takahashi Y, Tada M, Zhang X, Kashiwazaki H, Yamazaki Y, Inoue N, Moriuchi T. Aberrant expression of HOX genes in oral dysplasia and squamous cell carcinoma tissues. Oncol Res 2007; 16:217-24. [PMID: 17294802 DOI: 10.3727/000000006783981080] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Human HOX genes consist of 39 genes and encode transcription factors that function as master developmental regulators. We hypothesized that the misexpression of HOX genes was associated with carcinogenesis and malignant progression. The expression levels of 39 HOX genes in 31 human oral squamous cell carcinoma (SCC), 11 dysplasia, and 10 normal mucosa tissues were quantified by the real-time RT-PCR method. The expression levels of 18 HOX genes in the SCC tissues were significantly higher than those in the normal mucosa tissues. The dysplasia tissues showed higher expression of HOXA2, A3, B3, and D10 than normal mucosa tissues whereas they showed lower expression of HOXA1, B7, B9, and C8 than SCC. The SCC with lymph node metastasis showed high expression of HOXC6 compared to the SCC without it. These results suggest that misexpressions of particular HOX genes are implicated in the development of oral dysplasia and SCC.
Collapse
|
37
|
Abstract
OBJECTIVES This study was designed to compare the levels of copper/zinc superoxide dismutase (Cu/Zn SOD), peroxidase (POx) and glutathione peroxidase (GSH-Px) in saliva of smokers and those in saliva of non-smokers. METHODS Unstimulated saliva samples were collected from 88 elderly males (65 years old or over) who visited a private dental clinic. Forty-four subjects were current smokers (more than 20 cigarettes daily for at least 30 years) and 44 were non-smokers. The levels of salivary thiocyanate, Cu/Zn SOD, GSH-Px, and POx activity were measured using standard procedures. RESULTS The mean levels of salivary thiocyanate (SCN(-)) and SOD were significantly higher (p < 0.01) in the smoking group than in the non-smoking group, whereas the specific activity levels of POx and GSH-Px were significantly higher (p < 0.05) in the non-smoking group than in the smoking group. Significant correlation coefficients were found between the levels of SCN(-) and SOD (r = 0.37, p < 0.001). In the non-smoking group, a significant positive association was found between specific activity of POx and age (r = 0.33, p < 0.05). CONCLUSION Measurement of SCN(-) and Cu/Zn SOD in human saliva might be useful for estimating the level of oxidative stress caused by cigarette smoke. Despite increased H2O2 level as a defense system induced by SOD, detoxification of H2O2 might be deteriorated in the oral cavity of elderly smokers.
Collapse
Affiliation(s)
- Takashi Kanehira
- Comprehensive Conservation Dentistry, Hokkaido University Hospital, Sapporo, Japan
| | | | | | | | | |
Collapse
|
38
|
Kashiwazaki H, Tei K, Takashi N, Kasahara K, Totsuka Y, Inoue N. Relationship between bite force and body mass index in the institutionalized elderly. Geriatr Gerontol Int 2005. [DOI: 10.1111/j.1447-0594.2005.00278.x] [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: 11/27/2022]
|
39
|
Mitsumoto Y, Nakajima T, Marutani M, Kashiwazaki H, Moriguchi M, Kimura H, Okanoue T, Kagawa K, Tada M. Loss of p53 transcriptional activity in hepatocellular carcinoma evaluated by yeast-based functional assay: comparison with p53 immunohistochemistry. Hum Pathol 2004; 35:350-6. [PMID: 15017592 DOI: 10.1016/j.humpath.2003.09.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
We studied the transcriptional activity of p53 protein in 50 tissues of hepatocellular carcinoma (HCC) using a yeast functional assay. In this assay, red yeast colonies indicate that p53 protein cannot bind to its specific domain and has lost its transcriptional activity. We also clarified whether mutant p53 protein could inactivate wild-type p53 protein in a transdominant manner using a modified yeast assay. In addition, we examined whether immunohistochemically detectable p53 protein was functionally inactive. The incidence of p53 inactivation was significantly higher in tumors with capsular invasion. Out of 21 tumors diagnosed with p53 mutations, 11 exhibited >75% red colonies, and all contained missense mutations. In these tumors, p53 function was lost because there was supposedly no intact p53 gene on either allele. One missense mutant produced <60% red colonies, but it was also considered inactive as a p53 protein heterotetramer because of its transdominant activity. In 7 of the remaining 9 tumors, p53 was considered to be mutated on one allele and intact on the other. All of these 7 tumors contained nonsense or frameshift mutations and had no transdominant activity, which suggested that p53 function remained intact. Alternately, immunohistochemical analysis demonstrated that all of the tumors with missense mutations were positively immunostained, whereas those that contained nonsense or frameshift mutations were negatively stained. Consequently, positively immunostaining tumors mostly coincided with p53-inactive tumors. These yeast-based assays suggested that p53 function was retained in some mutant cases. Immunohistochemistry was helpful in screening functionally inactive p53 protein in HCCs.
Collapse
Affiliation(s)
- Yasuhide Mitsumoto
- Molecular Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine Graduate School of Medical Science, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
40
|
Yamazaki Y, Chiba I, Hirai A, Notani KI, Kashiwazaki H, Tei K, Totsuka Y, Iizuka T, Kohgo T, Fukuda H. Radioresistance in Oral Squamous Cell Carcinoma With p 53 DNA Contact Mutation. Am J Clin Oncol 2003; 26:e124-9. [PMID: 14528086 DOI: 10.1097/01.coc.0000091352.60347.f8] [Citation(s) in RCA: 14] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Reliable variables to predict the radiosensitivity of each tumor have not been identified. Recent studies have demonstrated that specific regions of mutations within the core domain of p53 protein correlate with responses to chemotherapy and radiotherapy in some tumor types. In this study, we evaluated the relationship between specific p53 mutations and radiosensitivity in 49 patients with oral squamous cell carcinomas (SCCs) who underwent preoperative radiotherapy. Exons 5 through 8 of the p53 gene were examined by polymerase chain reaction-single-strand conformation polymorphism and direct sequencing. We detected p53 mutations in 27 (55.1%) cases. DNA contact mutations were detected in 11 (40.7%) of these 27 cases in L3 loop, loop-sheet-helix motif, and zinc-binding residues. Tumors containing p53 DNA contact mutations had significantly poorer responses to radiation than the other tumors, although no statistically significant difference between tumors with and without p53 mutations was found. These data indicate that DNA contact mutation of p53 could be a useful marker to predict the radioresistance of oral SCCs.
Collapse
Affiliation(s)
- Yutaka Yamazaki
- Oral Diagnosis and Oral Medicine, Department of Oral Pathobiological Science, Graduate School of Dental Medicine, Hokkaido University, Kita-13 Nishi-7, Kita-ku, Sapporo 060-8586, Hokkaido, Japan.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Yamazaki Y, Chiba I, Hirai A, Sugiura C, Notani KI, Kashiwazaki H, Tei K, Totsuka Y, Fukuda H. Specific p53 mutations predict poor prognosis in oral squamous cell carcinoma. Oral Oncol 2003; 39:163-9. [PMID: 12509970 DOI: 10.1016/s1368-8375(02)00064-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.8] [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: 11/16/2022]
Abstract
In this study, we focused on p53 mutations in specific regions, including DNA-binding surface regions, to clarify the correlation between mutations within the specific regions of p53 and clinical outcomes of patients with oral cancers. We analyzed p53 mutations in 121 fresh primary oral squamous cell carcinomas (SCCs) by polymerase chain reaction-single-strand conformation polymorphism or a yeast functional assay. p53 mutations were detected in 51/121 (42%) cases. Mutation of p53 was not associated with any clinicopathological parameters; however, tumors containing specific p53 mutations, e.g. DNA-binding surface regions (L2, L3 and the LSH motif) and conserved regions (II-V), had significantly poorer prognoses than tumors with mutations outside of those regions. Moreover, locoregional failure, lymph node metastasis and the occurrence of subsequent distant metastasis were also significantly associated with mutations within DNA-binding surface regions. These data indicate that specific mutations of p53 could be important prognostic factors in oral SCCs.
Collapse
Affiliation(s)
- Yutaka Yamazaki
- Oral Diagnosis and Oral Medicine, Department of Oral Pathobiological Science, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan.
| | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Nozaki M, Tada M, Kashiwazaki H, Hamou M, Diserens A, Shinohe Y, Sawamura Y, Iwasaki Y, de Tribolet N, Hegi ME. p73 is not mutated in meningiomas as determined with a functional yeast assay but p73 expression increases with tumor grade. Brain Pathol 2001; 11:296-305. [PMID: 11414472 PMCID: PMC8098457 DOI: 10.1111/j.1750-3639.2001.tb00400.x] [Citation(s) in RCA: 24] [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] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
The p53 gene is normally wild type in meningiomas. Since all three members of the p53 gene family recognize the same DNA sequence, tumors containing wild type p53 could decrease transactivation of p53 target genes by mutating either p63 or p73. In meningiomas the most likely target is p73, because loss of heterozygosity of the chromosomal band containing p73 is the commonest genetic lesion in these tumors. To screen p73 for mutations we have developed a functional assay which tests the ability of p73 to activate transcription from a p53-responsive promoter in yeast. The assay correctly identified p73 mutants with mutations equivalent to hotspot mutations in p53, demonstrating that the assay can detect transcriptionally inactive p73. No mutations in p73 were identified in meningiomas. p73 RNA level was higher in more advanced tumors, but there was no correlation between the expression level of p73 and p21, a known p53 target gene. The yeast assay was also used to measure the intrinsic sensitivity of the p73 protein to mutagenesis. Like p53, p73 is exceptionally easy to inactivate as a transcription factor by point mutation. Taken together, these results indicate that p53 and p73 serve very different functions in tumors.
Collapse
Affiliation(s)
- Michimasa Nozaki
- Laboratory of Tumor Biology and Genetics, Department of Neurosurgery, University Hospital, Lausanne, Switzerland
- Department of Neurosurgery
| | - Mitsuhiro Tada
- Division of Cancer‐Related Genes, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan
| | - Haruhiko Kashiwazaki
- Division of Cancer‐Related Genes, Institute for Genetic Medicine, Hokkaido University, Sapporo, Japan
| | - Marie‐France Hamou
- Laboratory of Tumor Biology and Genetics, Department of Neurosurgery, University Hospital, Lausanne, Switzerland
| | - Annie‐Claire Diserens
- Laboratory of Tumor Biology and Genetics, Department of Neurosurgery, University Hospital, Lausanne, Switzerland
| | | | | | | | - Nicolas de Tribolet
- Laboratory of Tumor Biology and Genetics, Department of Neurosurgery, University Hospital, Lausanne, Switzerland
| | - Monika E. Hegi
- Laboratory of Tumor Biology and Genetics, Department of Neurosurgery, University Hospital, Lausanne, Switzerland
| |
Collapse
|
43
|
Kobayashi T, Nishikido N, Kageyama T, Kashiwazaki H. Sympathetic predominance in young male white-collar workers with mild to moderate hypertension. Ind Health 2001; 39:199-205. [PMID: 11341553 DOI: 10.2486/indhealth.39.199] [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] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
In order to investigate the difference in diurnal variation of autonomic control between young male mild to moderate hypertensive and normotensive white-collar workers, we accessed heart rate variability with ambulatory blood pressure for over 24 hours including work and sleep periods. Both mean systolic and diastolic blood pressures (SBP and DBP) were significantly (p<0.01) higher in hypertensives (HT, n=11) than normotensives (NT, n=11) in all phases, whereas heart rate was not different between them in any phase. Blood pressures during work period (on-duty) were significantly higher than those during non-work period (off-duty) in both NT and HT. High frequency (HF; 0.15-0.40 Hz) power showed a circadian pattern in phase with the sleep-wake cycle. Both HF and low frequency (LF; 0.05-0.15 Hz) powers in HT were significantly lower than that in NT during the sleep period (p<0.05). LF/HF ratio showed a circadian pattern that was almost opposite of the pattern in HF power. Twenty-four-hour average LF/HF in HT was higher than that in NT (p<0.05). Especially during on-duty, LF/HF in HT was significantly higher than in NT (p<0.05). The increase of SBP and LF/HF from off-duty period to on-duty period (deltaSBP and deltaLF/HF) showed significant positive correlation (r=0.67, P<0.05) in HT group, suggesting that the SBP elevation during on-duty in HT may be coupled with sympathetic activation. These results suggest that HT showed significantly reduced parasympathetic control during sleep and an increased sympathetic activity especially during on-duty as compared with NT. Our findings imply that persistence of sympathodominant states together with reduced vagal activity in young mild to moderate hypertensive workers may be related to future cardiovascular disorders.
Collapse
Affiliation(s)
- T Kobayashi
- Department of Hygiene and Preventive Medicine, Fukushima Medical University, School of Medicine, Japan
| | | | | | | |
Collapse
|
44
|
Abstract
Despite important advances in understanding the molecular basis of cancer, few treatments have been devised which rationally target known causal oncogenic defects. Selectively replicating viruses have a major advantage over nonreplicating viruses to target these defects because the therapeutic effect of the injected virus is augmented by virus produced within the tumor. To permit rational targeting of colon tumors, we have developed replicating adenoviruses that express the viral E1B and E2 genes from promoters controlled by the Tcf4 transcription factor. Tcf4 is constitutively activated by mutations in the adenomatous polyposis coli and beta-catenin genes in virtually all colon tumors and is constitutively repressed by Groucho and CtBP in normal tissue. The Tcf-E2 and Tcf-E1B promoters are active in many, but not all, cell lines with activation of the wnt pathway. Viruses with Tcf regulation of E2 expression replicate normally in SW480 colon cancer cells but show a 50- to 100-fold decrease in replication in H1299 lung cancer cells and WI38 normal fibroblasts. Activation of wnt signaling by transduction of a stable beta-catenin mutant into normal fibroblasts renders the cells permissive for virus replication. Insertion of Tcf4 sites in the E1B promoter has only small effects on replication in vitro but significantly reduces the inflammatory response in a rodent lung model in vivo. Replicating adenoviruses with Tcf regulation of both E1B and E2 transcription are potentially useful for the treatment of liver metastases from colorectal tumors, but additional changes will be required to produce a virus that can be used to treat all colon tumors.
Collapse
Affiliation(s)
- M Brunori
- Swiss Institute for Experimental Cancer Research (ISREC), 1066 Epalinges, Switzerland
| | | | | | | |
Collapse
|
45
|
Takahashi M, Tonoki H, Tada M, Kashiwazaki H, Furuuchi K, Hamada J, Fujioka Y, Sato Y, Takahashi H, Todo S, Sakuragi N, Moriuchi T. Distinct prognostic values of p53 mutations and loss of estrogen receptor and their cumulative effect in primary breast cancers. Int J Cancer 2000. [PMID: 10719737 DOI: 10.1002/(sici)1097-0215(20000120)89:1<92::aid-ijc15>3.0.co;2-8] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A total of 76 primary breast cancers were screened for p53 mutations using the yeast p53 functional assay, and the mutations were determined by DNA sequencing. Clonal mutations of p53 were detected in 30 tumors (39%). Immunohistochemical staining for nuclear p53 accumulation performed on the yeast assay-positive cases clearly differentiated missense mutations in the DNA binding domain (contact mutant; 17 cases) as positive stain and nonsense-type mutations or missense mutations that may affect 3D-structure of p53 protein (structural mutant; 13 cases) as negative stain. Enzyme immunoassay revealed loss of estrogen receptor in 36 tumors (50%). Prognostic values of p53 mutation and loss of estrogen receptor were evaluated after a median follow-up period of 44 months. p53 mutations were associated with a short overall survival (log rank test, p = 0.0319), whereas it was not related to disease-free (recurrence-free) survival. Contact mutants were associated with slightly shorter survival compared with structural mutants. Inversely, loss of estrogen receptor was associated with early recurrence (p = 0.0461) but not with short overall survival. The patients with tumors harboring both p53 mutation and loss of estrogen receptor had the poorest outcome (p = 0.0019 and 0.0075 for overall and disease-free survivals, respectively), suggesting independent and additive effects of the 2 factors. The independent role of the 2 factors was confirmed by a multivariate analysis using the Cox proportional hazard model stratified according to clinical tumor stages. Although preliminary, due to the small number of patients studied and the relatively short follow-up time, our results suggest that p53 mutations and loss of estrogen receptor cooperatively affect the prognosis of primary breast cancer patients.
Collapse
Affiliation(s)
- M Takahashi
- Cancer Institute, First Department of Surgery, Hokkaido University School of Medicine, Sapporo, Japan
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
46
|
Takahashi M, Tonoki H, Tada M, Kashiwazaki H, Furuuchi K, Hamada J, Fujioka Y, Sato Y, Takahashi H, Todo S, Sakuragi N, Moriuchi T. Distinct prognostic values of p53 mutations and loss of estrogen receptor and their cumulative effect in primary breast cancers. Int J Cancer 2000; 89:92-9. [PMID: 10719737 DOI: 10.1002/(sici)1097-0215(20000120)89:1<92::aid-ijc15>3.0.co;2-8] [Citation(s) in RCA: 23] [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] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A total of 76 primary breast cancers were screened for p53 mutations using the yeast p53 functional assay, and the mutations were determined by DNA sequencing. Clonal mutations of p53 were detected in 30 tumors (39%). Immunohistochemical staining for nuclear p53 accumulation performed on the yeast assay-positive cases clearly differentiated missense mutations in the DNA binding domain (contact mutant; 17 cases) as positive stain and nonsense-type mutations or missense mutations that may affect 3D-structure of p53 protein (structural mutant; 13 cases) as negative stain. Enzyme immunoassay revealed loss of estrogen receptor in 36 tumors (50%). Prognostic values of p53 mutation and loss of estrogen receptor were evaluated after a median follow-up period of 44 months. p53 mutations were associated with a short overall survival (log rank test, p = 0.0319), whereas it was not related to disease-free (recurrence-free) survival. Contact mutants were associated with slightly shorter survival compared with structural mutants. Inversely, loss of estrogen receptor was associated with early recurrence (p = 0.0461) but not with short overall survival. The patients with tumors harboring both p53 mutation and loss of estrogen receptor had the poorest outcome (p = 0.0019 and 0.0075 for overall and disease-free survivals, respectively), suggesting independent and additive effects of the 2 factors. The independent role of the 2 factors was confirmed by a multivariate analysis using the Cox proportional hazard model stratified according to clinical tumor stages. Although preliminary, due to the small number of patients studied and the relatively short follow-up time, our results suggest that p53 mutations and loss of estrogen receptor cooperatively affect the prognosis of primary breast cancer patients.
Collapse
Affiliation(s)
- M Takahashi
- Cancer Institute, First Department of Surgery, Hokkaido University School of Medicine, Sapporo, Japan
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
47
|
Marutani M, Tonoki H, Tada M, Takahashi M, Kashiwazaki H, Hida Y, Hamada J, Asaka M, Moriuchi T. Dominant-negative mutations of the tumor suppressor p53 relating to early onset of glioblastoma multiforme. Cancer Res 1999; 59:4765-9. [PMID: 10519380] [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: 02/14/2023]
Abstract
Previous experiments have suggested that some mutant forms of p53 are able to inactivate the endogenous wild-type p53 protein in a dominant-negative fashion. However, it remains unknown whether tumors with such dominant-negative (transdominant) p53 mutants have a biological significance that is different from that of recessive p53 mutants. In this study, we examined the dominant-negative potential of various p53 mutants using a yeast-based assay in which both wild-type and mutant p53 were efficiently expressed. We tested a total of 106 p53 mutants, which were identified in brain tumors, glioblastoma multiforme-derived cell lines, breast cancers, or premalignant lesions and squamous cell carcinomas of oral epithelium or were otherwise created by mutagenesis. In agreement with the previous studies, our results demonstrated that transdominant mutations affected amino acid residues that are essential for the stabilization of the DNA-binding surface in the p53 core domain and for the direct interaction of p53 with its DNA-binding sequence. Among 40 patients with sporadic glioblastomas, the average age at diagnosis was significantly younger in the patients with tumors harboring dominant-negative mutations (30.4 +/- 14.7 years, n = 7) than it was in those with recessive mutations (55.2 +/- 18.6 years, n = 9, P < 0.012) and in those without mutations (54.7 +/- 17.1 years, n = 24, P < 0.003). Our data suggest that dominant-negative p53 mutants accelerate development and/or growth of glioblastoma anlagen.
Collapse
Affiliation(s)
- M Marutani
- Cancer Institute, and Department of Internal Medicine III, Hokkaido University School of Medicine, Sapporo, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
48
|
Chiba I, Muthumala M, Yamazaki Y, Zaman A, Iizuka T, Amemiya A, Shibata T, Kashiwazaki H, Sugiura C, Fukuda H. Characteristics of mutations in thep53 gene of oral squamous-cell carcinomas associated with betel-quid chewing in Sri Lanka. Int. J. Cancer77, 839-842 (1998). Int J Cancer 1999. [DOI: 10.1002/(sici)1097-0215(19990129)80:3<486::aid-ijc26>3.0.co;2-l] [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: 11/10/2022]
|
49
|
Abstract
High hematocrit (Ht) level has been reported to be a correlating factor of hypertension in aged people, but has not been examined in younger generation. To investigate the association between Ht and blood pressure (BP) in healthy young workers, statistical analysis was performed for 646 male employees, using cross-sectional health-check data. Ht was positively correlated with systolic blood pressure (SBP) and with diastolic blood pressure (DBP) by Pearson's simple correlation analysis. Multiple regression analysis for SBP and DBP was conducted by stepwise procedure, using Ht, age, body mass index (BMI), and drinking and smoking habits as independent variables. It was revealed that Ht was a significant independent variable for DBP (p < 0.001), as well as age and BMI, but not for SBP. These findings suggest that increased Ht is an important variable for assessing risk for cardiovascular disorders, especially diastolic hypertension, in young male office workers.
Collapse
|
50
|
Kashiwazaki H. Heart rate monitoring as a field method for estimating energy expenditure as evaluated by the doubly labeled water method. J Nutr Sci Vitaminol (Tokyo) 1999; 45:79-94. [PMID: 10360243 DOI: 10.3177/jnsv.45.79] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.4] [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: 11/27/2022]
Abstract
Energy expenditure (TEE) determined by the doubly labeled water technique (DLW) in 10 adult subjects (5 males and 5 females) was used to evaluate the energy expenditure estimated from 24 h heart rate monitoring records (HR method) for 2 d randomly sampled during 2 weeks of DLW study. Individual data on HR and oxygen consumption, obtained during a step test (resting conditions, and up and down at 3 or 4 stepping rates) and postabsorptive conditions (resting metabolic rate: RMR), were used to calculate three types of calibration regression line, i.e., straight-linear regression (EE-HR: A for TEEhr-A), log-linear regression (lnEE-HR: B for TEEhr-B), and two-linear regression (flex-HR method: C for TEEhr-C). When the 24 h HR records were applied, these calibration regressions provided three estimates of TEE (mean +/- SD kcal/24 h): TEEhr-A (3,059 +/- 1,246 in all subjects), TEEhr-B (2,472 +/- 843), and TEEhr-C (2,759 +/- 1,228). Mean TEE determined by the DLW method (TEEdlw) was 2,544 +/- 378 kcal/24 h. Although no mean values estimated by HR methods were significantly different statistically from the mean value of TEEdlw, the variances of the estimates (e.g., SD) by the HR method were much greater than that of TEEdlw (between twofold and threefold). TEEhr-B estimated by lnEE-HR regression provided the smallest differences from that of TEEdlw (mean difference of -3.1% with a range of -35.1(-)+36.6%). From these observations, the following conclusions were made: 1) The estimates of TEE by HR are useful as a group mean, but interpretation of the individual TEE estimates requires caution because of great deviations from the reference values. 2) Among the calibration methods tested, the log-linear calibration regression (lnEE on HR) gives the best estimates of TEE by the HR method and is recommended for use in future studies.
Collapse
Affiliation(s)
- H Kashiwazaki
- Department of Human Sciences, School of Health Sciences, University of Occupational and Environmental Health, Kitakyushu, Japan.
| |
Collapse
|