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Onozawa G, Nagasaka A, Bando Y, Sakiyama K, Yamamoto N, Amano O. Specific localization of fibroblasts at the intercalated duct in the major salivary glands of rats. J Oral Biosci 2024; 66:456-464. [PMID: 38382878 DOI: 10.1016/j.job.2024.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 02/09/2024] [Accepted: 02/13/2024] [Indexed: 02/23/2024]
Abstract
OBJECTIVES Immunohistochemical methods were employed to investigate the morphological heterogeneity and localization of fibroblasts associated with the function of major salivary glands in rats. METHODS Histochemical and electron microscopic observations were made in rat parotid, submandibular, and sublingual glands and pancreas. Fibroblasts were immunostained using their specific marker, 47 kDa heat shock protein (Hsp47). RESULTS Hsp47-immunopositive fibroblasts within the intralobular connective tissue exhibited a notably smaller size compared with the interlobular connective tissue. They were loosely distributed throughout the connective tissue. However, fibroblasts with elongated long processes were explicitly identified at the intercalated ducts in parotid, sublingual, and submandibular glands. Fibroblastic bodies and processes were tightly approximated with the basement membrane of the duct. Electron microscopy confirmed these findings, revealing a thin layer consisting of collagen fibers was found between the fibroblasts and the basement membrane. Double staining of Hsp47 and α-smooth muscle actin (αSMA) in parotid glands indicating that Hsp47-positive fibroblasts enveloped both the duct and αSMA-positive myoepithelial cells. Additionally, They projected long and thin processes longitudinally at the straight portion or circularly at the bifurcated portion of the duct. The three-dimensional reconstruction showed a frame-like structure of fibroblasts surrounding the intercalated duct with longitudinal myoepithelial cells. However, such specific localization of fibroblasts was not detected in the exocrine pancreas lacking myoepithelium. CONCLUSIONS Small fibroblasts with long processes connecting or overwrapping each other and thin collagen layers surround the intercalated ducts in rat major salivary glands, presumably contributing to protecting the ducts from salivary flow and myoepithelial contraction.
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Affiliation(s)
- Go Onozawa
- Division of Histology, Meikai University School of Dentistry, 1-1 Keyakidai, Sakado, Saitama, 3500283, Japan; Division of Oral and Maxillofacial Surgery, Meikai University School of Dentistry, 1-1 Keyakidai, Sakado, Saitama, 3500283, Japan
| | - Arata Nagasaka
- Division of Histology, Meikai University School of Dentistry, 1-1 Keyakidai, Sakado, Saitama, 3500283, Japan
| | - Yasuhiko Bando
- Division of Histology, Meikai University School of Dentistry, 1-1 Keyakidai, Sakado, Saitama, 3500283, Japan
| | - Koji Sakiyama
- Division of Anatomy, Meikai University School of Dentistry, 1-1 Keyakidai, Sakado, Saitma, 3500283, Japan
| | - Nobuharu Yamamoto
- Division of Oral and Maxillofacial Surgery, Meikai University School of Dentistry, 1-1 Keyakidai, Sakado, Saitama, 3500283, Japan
| | - Osamu Amano
- Division of Histology, Meikai University School of Dentistry, 1-1 Keyakidai, Sakado, Saitama, 3500283, Japan.
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Guo S, Yang H, Liu J, Meng Z, Sui L. Heat Shock Proteins in Tooth Development and Injury Repair. Int J Mol Sci 2023; 24:ijms24087455. [PMID: 37108621 PMCID: PMC10138928 DOI: 10.3390/ijms24087455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 04/13/2023] [Accepted: 04/16/2023] [Indexed: 04/29/2023] Open
Abstract
Heat shock proteins (HSPs) are a class of molecular chaperones with expression increased in response to heat or other stresses. HSPs regulate cell homeostasis by modulating the folding and maturation of intracellular proteins. Tooth development is a complex process that involves many cell activities. During tooth preparation or trauma, teeth can be damaged. The damaged teeth start their repair process by remineralizing and regenerating tissue. During tooth development and injury repair, different HSPs have different expression patterns and play a special role in odontoblast differentiation and ameloblast secretion by mediating signaling pathways or participating in protein transport. This review explores the expression patterns and potential mechanisms of HSPs, particularly HSP25, HSP60 and HSP70, in tooth development and injury repair.
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Affiliation(s)
- Shuling Guo
- School of Stomatology, Tianjin Medical University, Tianjin 300014, China
| | - Haosun Yang
- School of Stomatology, Tianjin Medical University, Tianjin 300014, China
| | - Jiacheng Liu
- School of Stomatology, Tianjin Medical University, Tianjin 300014, China
| | - Zhaosong Meng
- School of Stomatology, Tianjin Medical University, Tianjin 300014, China
| | - Lei Sui
- School of Stomatology, Tianjin Medical University, Tianjin 300014, China
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Karri RL, Subramanyam RV, Venigella A, Babburi S, Pinisetti S, Rudraraju A. Differential Expression of Heat Shock Protein 27 in Oral Epithelial Dysplasias and Squamous Cell Carcinoma. J Microsc Ultrastruct 2020; 8:62-68. [PMID: 32766120 PMCID: PMC7365515 DOI: 10.4103/jmau.jmau_48_19] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Accepted: 01/01/2020] [Indexed: 01/24/2023] Open
Abstract
Background: Oral squamous cell carcinoma (OSCC) is the most devastating neoplasm with dramatic increase in morbidity and mortality. The detection and prognostic evaluation of precancerous lesions could aid in early control of cancer. Heat shock protein (HSP) 27 has found to be a biomarker and therapeutic target in different types of cancer. Aim: This study aims to investigate the role of HSP 27 as prognostic molecular indicator of malignant transformation in oral epithelial dysplasias. Materials and Methods: Thirty samples of epithelial dysplasia (10 mild dysplasia, 10 moderate dysplasia, and 10 severe dysplasia/carcinoma in situ cases), 10 samples each of well-differentiated OSCC and normal oral mucosa were routinely processed, formalin-fixed, paraffin-embedded, and analyzed for HSP27 expression by immunohistochemistry. Statistical analysis was done by one way-ANOVA and Mann–Whitney test to assess the differences between two individual groups. Results: Normal mucosa showed intense, but nonuniform, expression of HSP27. An initial decline was noted in dysplasias. A significant correlation of HSP27 expression was observed with the severity of dysplasia and well-differentiated OSCC (P < 0.05). Conclusion: Low HSP 27 expression can be considered as early molecular indicator of initial dysplastic change in normal mucosa. An overexpression of HSP 27 in clinically and histologically confirmed dysplasia could indicate likely transformation to well-differentiated OSCC and could be of prognostic value. However, further studies with a larger sample size are required to confirm the role of HSP 27 as predictive indicator.
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Affiliation(s)
- Roja Lakshmi Karri
- Department of Oral and Maxillofacial Pathology, GSL Dental College and Hospital, East Godavari, Andhra Pradesh, India
| | - R Venkata Subramanyam
- Department of OMFS and Diagnostic Sciences, College of Dentistry, King Faisal University, Al-Ahasa, Saudi Arabia
| | - Aparna Venigella
- Department of Oral and Maxillofacial Pathology, Drs. Sudha and Nageswara Rao Siddhartha Institute of Dental Sciences, Krishna District, Andhra Pradesh, India
| | - Suresh Babburi
- Department of Oral and Maxillofacial Pathology, Drs. Sudha and Nageswara Rao Siddhartha Institute of Dental Sciences, Krishna District, Andhra Pradesh, India
| | - Soujanya Pinisetti
- Department of Oral and Maxillofacial Pathology, Government Dental College, Vijayawada, Andhra Pradesh, India
| | - Amrutha Rudraraju
- Department of Oral Pathology, Navodaya Dental College, Raichur, Karnataka, India
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Cueno ME, Ochiai K. Re-discovering periodontal butyric acid: New insights on an old metabolite. Microb Pathog 2015; 94:48-53. [PMID: 26466516 DOI: 10.1016/j.micpath.2015.10.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 10/05/2015] [Accepted: 10/06/2015] [Indexed: 02/02/2023]
Abstract
The oral microbiome is composed of detrimental and beneficial microbial communities producing several microbial factors that could contribute to the development of the oral microbiome and, likewise, may lead to the development of host diseases. Metabolites, like short-chain fatty acids, are commonly produced by the oral microbiome and serve various functions. Among the periodontal short-chain fatty acids, butyric acid is mainly produced by periodontopathic bacteria and, attributable to the butyrate paradox, is postulated to exhibit a dual function depending on butyric acid concentration. A better understanding of the interconnecting networks that would influence butyric acid function in the oral cavity may shed a new light on the current existing knowledge and view regarding butyric acid.
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Affiliation(s)
- Marni E Cueno
- Department of Microbiology, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan.
| | - Kuniyasu Ochiai
- Department of Microbiology, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan.
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Mizobe K, Kawabe Y, Bando Y, Sakiyama K, Araki H, Amano O. Localization of hsp27 in the rat submandibular gland following the application of various surgical treatments. Acta Histochem Cytochem 2014; 47:255-64. [PMID: 25859059 PMCID: PMC4387262 DOI: 10.1267/ahc.14037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Accepted: 09/18/2014] [Indexed: 11/22/2022] Open
Abstract
Salivary glands repair and regenerate following various types of injuries and surgical procedures. However, the tissue responses induced in the contralateral glands have yet to be elucidated in detail. Hsp27, a member of the heat-shock protein (Hsp) family, is strongly expressed in physiological environments, particularly during development. Hsp27 was previously shown to play a role in the regulation of acinar cell proliferation and differentiation in the rat submandibular gland. The present study performed the following surgical treatments on the right submandibular glands of adult rats: 1) duct ligation followed by unligation after one week; 2) partial sialoadenectomy; and 3) total sialoadenectomy. Immunohistochemistry for Hsp27 and Ki67 was performed in the experimental and normal contralateral glands, and localization was histologically and morphometrically analyzed. The results obtained revealed the localization of Hsp27 to the intercalated duct in the submandibular glands of non-treated rats. The expression of Hsp27 was strongly induced in both the uninjured contralateral control glands as well as treated glands of experimental rats regardless of the surgical procedure performed. The number of Hsp27-immunopositive cells increased rapidly following surgery, and subsequently returned to the same level as that in non-treated rats after 4 weeks. However, no marked changes were observed in the number of Ki67-immunopositive proliferating cells. Therefore, the change in the number of Hsp27-immunopositive cells may have contributed to compensatory hypertrophy. The results of the present study indicate that the expression of Hsp27 in the intercalated duct in the submandibular gland may play a role in the differentiation of acinar cells.
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Affiliation(s)
- Kenichi Mizobe
- Division of Anatomy, Department of Human Development and Fostering, Meikai University School of Dentistry, 1–1 Keyakidai, Sakado, Saitama 350–0283, Japan
- Division of Oral Rehabilitation, Department of Restorative and Biomaterials Sciences, Meikai University School of Dentistry
| | - Yoshihiro Kawabe
- Division of Anatomy, Department of Human Development and Fostering, Meikai University School of Dentistry, 1–1 Keyakidai, Sakado, Saitama 350–0283, Japan
- Division of Oral Rehabilitation, Department of Restorative and Biomaterials Sciences, Meikai University School of Dentistry
| | - Yasuhiko Bando
- Division of Anatomy, Department of Human Development and Fostering, Meikai University School of Dentistry, 1–1 Keyakidai, Sakado, Saitama 350–0283, Japan
| | - Koji Sakiyama
- Division of Anatomy, Department of Human Development and Fostering, Meikai University School of Dentistry, 1–1 Keyakidai, Sakado, Saitama 350–0283, Japan
| | - Hisao Araki
- Division of Oral Rehabilitation, Department of Restorative and Biomaterials Sciences, Meikai University School of Dentistry
| | - Osamu Amano
- Division of Anatomy, Department of Human Development and Fostering, Meikai University School of Dentistry, 1–1 Keyakidai, Sakado, Saitama 350–0283, Japan
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Cueno ME, Imai K, Matsukawa N, Tsukahara T, Kurita-Ochiai T, Ochiai K. Butyric acid retention in gingival tissue induces oxidative stress in jugular blood mitochondria. Cell Stress Chaperones 2013; 18:661-5. [PMID: 23397230 PMCID: PMC3745256 DOI: 10.1007/s12192-013-0409-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2012] [Revised: 01/26/2013] [Accepted: 01/28/2013] [Indexed: 12/13/2022] Open
Abstract
Butyric acid (BA) is a major extracellular metabolite produced by anaerobic periodontopathic bacteria and is commonly deposited in the gingival tissue. BA induces mitochondrial oxidative stress in vitro; however, its effects in vivo were never elucidated. Here, we determined the effects of butyric acid retention in the gingival tissues on oxidative stress induction in the jugular blood mitochondria. We established that BA injected in the rat gingival tissue has prolonged retention in gingival tissues. Blood taken at 0, 60, and 180 min after BA injection was used for further analysis. We isolated blood mitochondria, verified its purity, and measured hydrogen peroxide (H2O2), heme, superoxide (SOD), and catalase (CAT) to determine BA effects. We found that H2O2, heme, SOD, and CAT levels all increased after BA injection. This would insinuate that mitochondrial oxidative stress was induced ascribable to BA.
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Affiliation(s)
- Marni E. Cueno
- />Department of Microbiology, Division of Immunology and Pathobiology, Dental Research Center, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310 Japan
| | - Kenichi Imai
- />Department of Microbiology, Division of Immunology and Pathobiology, Dental Research Center, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310 Japan
| | - Noriko Matsukawa
- />Kyoto Institute of Nutrition and Pathology Inc., Tachikawa Ujitawara, Kyoto, 610-0231 Japan
| | - Takamitsu Tsukahara
- />Kyoto Institute of Nutrition and Pathology Inc., Tachikawa Ujitawara, Kyoto, 610-0231 Japan
| | - Tomoko Kurita-Ochiai
- />Department of Microbiology and Immunology, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271-8587 Japan
| | - Kuniyasu Ochiai
- />Department of Microbiology, Division of Immunology and Pathobiology, Dental Research Center, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310 Japan
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