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Toya Y, Shimada T, Hamada K, Watanabe K, Nakamura J, Fukushi D, Hatta W, Shinkai H, Ito H, Matsuhashi T, Fujimori S, Iwai W, Hanabata N, Shiroki T, Sasaki Y, Fujishima Y, Tsuji T, Yorozu H, Yoshimura T, Horikawa Y, Takahashi Y, Takahashi H, Kondo Y, Fujiwara T, Mizugai H, Gonai T, Tatsuta T, Onochi K, Kudara N, Abe K, Ohira T, Horikawa Y, Ishihata R, Hikichi T, Satoh K, Takahashi F, Masamune A, Iijima K, Fukuda S, Matsumoto T. Prediction model of 3-year survival after endoscopic submucosal dissection for early gastric cancer in elderly patients aged ≥ 85 years: EGC-2 model. J Cancer Res Clin Oncol 2023; 149:1521-1530. [PMID: 35546359 DOI: 10.1007/s00432-022-04024-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [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: 03/02/2022] [Accepted: 04/11/2022] [Indexed: 12/24/2022]
Abstract
PURPOSE Little is known about the prognostic factors for survival after endoscopic submucosal dissection (ESD) in elderly patients with early gastric cancer (EGC). The aim of this study is to determine prognostic factors and a prediction model of 3-year survival after ESD for EGC in patients aged ≥ 85 years. METHODS We retrospectively evaluated the clinical outcomes of 740 patients with EGC aged ≥ 85 years, who were treated by ESD at 30 institutions in Japan. Overall survival (OS) and disease-specific survival (DSS) were calculated with the Kaplan-Meier method. Prediction models for 3-year OS after ESD were estimated using the Cox proportional hazards model based on Uno's C-statistics. RESULTS During the follow-up period, 309 patients died of any cause and 10 patients died of gastric cancer. OS and DSS after 3 years were 82.7% and 99.2%, respectively. No significant differences in OS were found among curability categories. The Cox proportional hazards model revealed the geriatric nutritional risk index (GNRI) and the Charlson comorbidity index (CCI) to be predictors of 3-year survival. We established a final model (EGC-2 model) expressed by GNRI - (2.2×CCI) with a cutoff value of 96. The overall survival rate was significantly lower in the model value < 96 group than in the model value ≥ 96 group (P < 0.001). CONCLUSIONS The prediction model using GNRI and CCI will be useful to support decision-making for the treatment of EGC in elderly patients aged ≥ 85 years.
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Affiliation(s)
- Yosuke Toya
- Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Idaidori 1-1-1, Yahaba, 028-3694, Japan.
| | - Tomohiro Shimada
- Department of Gastroenterology, Sendai City Medical Center, Sendai, Japan
| | - Koichi Hamada
- Department of Minimally Invasive Surgical and Medical Oncology, Fukushima Medical University, Fukushima, Japan
| | - Ko Watanabe
- Department of Gastroenterology, Ohara General Hospital, Fukushima, Japan
| | - Jun Nakamura
- Department of Endoscopy, Fukushima Medical University Hospital, Fukushima, Japan
| | - Daisuke Fukushi
- Division of Gastroenterology, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Waku Hatta
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hirohiko Shinkai
- Department of Gastroenterology, Iwate Prefectural Isawa Hospital, Oshu, Japan
| | - Hirotaka Ito
- Department of Gastroenterology, Osaki Citizen Hospital, Osaki, Japan
| | - Tamotsu Matsuhashi
- Department of Gastroenterology and Neurology, Akita University Graduate School of Medicine, Akita, Japan
| | - Shusei Fujimori
- Department of Gastroenterology, Yokote Municipal Hospital, Yokote, Japan
| | - Wataru Iwai
- Department of Gastroenterology, Miyagi Cancer Center, Natori, Japan
| | - Norihiro Hanabata
- Division of Endoscopy, Aomori Prefectural Central Hospital, Aomori, Japan
| | - Takeharu Shiroki
- Department of Gastroenterology, Iwate Prefectural Central Hospital, Morioka, Japan
| | - Yu Sasaki
- Department of Gastroenterology, Faculty of Medicine, Yamagata University, Yamagata, Japan
| | - Yuukou Fujishima
- Division of Gastroenterology, Noshiro Kosei Medical Center, Noshiro, Japan
| | - Tsuyotoshi Tsuji
- Department of Gastroenterology, Akita City Hospital, Akita, Japan
| | - Haruka Yorozu
- Digestive Disease Center, Akita Red Cross Hospital, Akita, Japan
| | | | - Yohei Horikawa
- Department of Gastroenterology, Hiraka General Hospital, Yokote, Japan
| | - Yasushi Takahashi
- Department of Gastroenterology, National Hospital Organization Sendai Medical Center, Sendai, Japan
| | - Hiroshi Takahashi
- Department of Gastroenterology, Iwate Prefectural Ninohe Hospital, Ninohe, Japan
| | - Yutaka Kondo
- Division of Gastroenterology, Tohoku Rosai Hospital, Sendai, Japan
| | - Takao Fujiwara
- Department of Gastroenterology, Japanese Red Cross Morioka Hospital, Morioka, Japan
| | - Hisata Mizugai
- Department of Gastroenterology, Hachinohe Red Cross Hospital, Hachinohe, Japan
| | - Takahiro Gonai
- Department of Gastroenterology, Iwate Prefectural Kuji Hospital, Kuji, Japan
| | - Tetsuya Tatsuta
- Department of Gastroenterology and Hematology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Kengo Onochi
- Department of Gastroenterology, Omagari Kosei Medical Center, Daisen, Japan
| | - Norihiko Kudara
- Department of Internal Medicine and Gastroenterology, Iwate Prefectural Ofunato Hospital, Ofunato, Japan
| | - Keinosuke Abe
- Department of Gastroenterology, Iwate Prefectural Miyako Hospital, Miyako, Japan
| | - Tetsuya Ohira
- Department of Gastroenterology, Sendai City Medical Center, Sendai, Japan
| | - Yoshinori Horikawa
- Department of Gastroenterology, Southern-Tohoku General Hospital, Fukushima, Japan
| | - Ryoichi Ishihata
- Department of Gastroenterology, Ohara General Hospital, Fukushima, Japan
| | - Takuto Hikichi
- Department of Endoscopy, Fukushima Medical University Hospital, Fukushima, Japan
| | - Kennichi Satoh
- Division of Gastroenterology, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Fumiaki Takahashi
- Division of Medical Engineering, Department of Information Science, School of Medicine, Iwate Medical University, Yahaba, Japan
| | - Atsushi Masamune
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Katsunori Iijima
- Department of Gastroenterology and Neurology, Akita University Graduate School of Medicine, Akita, Japan
| | - Shinsaku Fukuda
- Department of Gastroenterology and Hematology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Takayuki Matsumoto
- Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Idaidori 1-1-1, Yahaba, 028-3694, Japan
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Hatta W, Toya Y, Shimada T, Hamada K, Watanabe K, Nakamura J, Fukushi D, Koike T, Shinkai H, Ito H, Matsuhashi T, Fujimori S, Iwai W, Hanabata N, Shiroki T, Sasaki Y, Fujishima Y, Tsuji T, Yorozu H, Yoshimura T, Horikawa Y, Takahashi Y, Takahashi H, Kondo Y, Fujiwara T, Mizugai H, Gonai T, Tatsuta T, Onochi K, Kudara N, Abe K, Ogata Y, Ohira T, Horikawa Y, Ishihata R, Hikichi T, Satoh K, Iijima K, Fukuda S, Matsumoto T, Masamune A. Treatment strategy after noncurative endoscopic resection for early gastric cancers in patients aged ≥ 85 years: a multicenter retrospective study in a highly aged area of Japan. J Gastroenterol 2023; 58:346-357. [PMID: 36633664 DOI: 10.1007/s00535-022-01948-7] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 12/24/2022] [Indexed: 01/13/2023]
Abstract
BACKGROUND The guidelines recommend additional gastrectomy after noncurative endoscopic resection for early gastric cancers (EGCs). However, no additional treatment might be acceptable in some patients aged ≥ 85 years. We aimed to identify this patient group using the data in a highly aged area. METHODS We enrolled patients aged ≥ 85 years after noncurative endoscopic resection for EGCs at 30 institutions of the Tohoku district in Japan between 2002 and 2017. Treatment selection and prognosis after noncurative endoscopic resection were investigated. Fourteen candidates were evaluated using the Cox model to identify risk factors for poor overall survival (OS) in patients with no additional treatment. RESULTS Of 1065 patients aged ≥ 85 years, 143 underwent noncurative endoscopic resection. Despite the guidelines' recommendation, 88.8% of them underwent no additional treatment. The 5-year OS rates in those with additional gastrectomy and those with no additional treatment were 63.1 and 65.2%, respectively. Multivariate analysis showed independent risk factors for poor OS in patients with no additional treatment were the high-risk category in the eCura system (hazard ratio [HR], 2.91), Charlson comorbidity index (CCI) ≥ 3 (HR, 2.78), and male (HR, 2.04). In patients with no additional treatment, nongastric cancer-specific survival was low (69.0% in 5 years), whereas disease-specific survival rates were very high in the low- and intermediate-risk categories of the eCura system (100.0 and 97.1%, respectively, in 5 years). CONCLUSIONS No additional treatment may be acceptable in the low- and intermediate-risk categories of the eCura system in patients aged ≥ 85 years with noncurative endoscopic resection for EGCs.
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Affiliation(s)
- Waku Hatta
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, 1-1 Seiryo-Machi, Aoba-Ku, Sendai, Miyagi, 980-8574, Japan.
| | - Yosuke Toya
- Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Yahaba, Japan
| | - Tomohiro Shimada
- Department of Gastroenterology, Sendai City Medical Center, Sendai, Japan
| | - Koichi Hamada
- Department of Minimally Invasive Surgical and Medical Oncology, Fukushima Medical University, Fukushima, Japan
| | - Ko Watanabe
- Department of Gastroenterology, Ohara General Hospital, Fukushima, Japan
| | - Jun Nakamura
- Department of Endoscopy, Fukushima Medical University Hospital, Fukushima, Japan
| | - Daisuke Fukushi
- Division of Gastroenterology Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Tomoyuki Koike
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, 1-1 Seiryo-Machi, Aoba-Ku, Sendai, Miyagi, 980-8574, Japan
| | - Hirohiko Shinkai
- Department of Gastroenterology, Iwate Prefectural Isawa Hospital, Oshu, Japan
| | - Hirotaka Ito
- Department of Gastroenterology, Osaki Citizen Hospital, Osaki, Japan
| | - Tamotsu Matsuhashi
- Department of Gastroenterology and Neurology, Akita University Graduate School of Medicine, Akita, Japan
| | - Shusei Fujimori
- Department of Gastroenterology, Yokote Municipal Hospital, Yokote, Japan
| | - Wataru Iwai
- Department of Gastroenterology, Miyagi Cancer Center, Natori, Japan
| | - Norihiro Hanabata
- Division of Endoscopy, Aomori Prefectural Central Hospital, Aomori, Japan
| | - Takeharu Shiroki
- Department of Gastroenterology, Iwate Prefectural Central Hospital, Morioka, Japan
| | - Yu Sasaki
- Department of Gastroenterology, Faculty of Medicine, Yamagata University, Yamagata, Japan
| | - Yuukou Fujishima
- Division of Gastroenterology, Noshiro Kosei Medical Center, Noshiro, Japan
| | - Tsuyotoshi Tsuji
- Department of Gastroenterology, Akita City Hospital, Akita, Japan
| | - Haruka Yorozu
- Digestive Disease Center, Akita Red Cross Hospital, Akita, Japan
| | | | - Yohei Horikawa
- Department of Gastroenterology, Hiraka General Hospital, Yokote, Japan
| | - Yasushi Takahashi
- Department of Gastroenterology, National Hospital Organization Sendai Medical Center, Sendai, Japan
| | - Hiroshi Takahashi
- Department of Gastroenterology, Iwate Prefectural Ninohe Hospital, Ninohe, Japan
| | - Yutaka Kondo
- Division of Gastroenterology, Tohoku Rosai Hospital, Sendai, Japan
| | - Takao Fujiwara
- Department of Gastroenterology, Japanese Red Cross Morioka Hospital, Morioka, Japan
| | - Hisata Mizugai
- Department of Gastroenterology, Hachinohe Red Cross Hospital, Hachinohe, Japan
| | - Takahiro Gonai
- Department of Gastroenterology, Iwate Prefectural Kuji Hospital, Kuji, Japan
| | - Tetsuya Tatsuta
- Department of Gastroenterology and Hematology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Kengo Onochi
- Department of Gastroenterology, Omagari Kosei Medical Center, Daisen, Japan
| | - Norihiko Kudara
- Department of Internal Medicine and Gastroenterology, Iwate Prefectural Ofunato Hospital, Ofunato, Japan
| | - Keinosuke Abe
- Department of Gastroenterology, Iwate Prefectural Miyako Hospital, Miyako, Japan
| | - Yohei Ogata
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, 1-1 Seiryo-Machi, Aoba-Ku, Sendai, Miyagi, 980-8574, Japan
| | - Tetsuya Ohira
- Department of Gastroenterology, Sendai City Medical Center, Sendai, Japan
| | - Yoshinori Horikawa
- Department of Gastroenterology, Southern-Tohoku General Hospital, Fukushima, Japan
| | - Ryoichi Ishihata
- Department of Gastroenterology, Ohara General Hospital, Fukushima, Japan
| | - Takuto Hikichi
- Department of Endoscopy, Fukushima Medical University Hospital, Fukushima, Japan
| | - Kennichi Satoh
- Division of Gastroenterology Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Katsunori Iijima
- Department of Gastroenterology and Neurology, Akita University Graduate School of Medicine, Akita, Japan
| | - Shinsaku Fukuda
- Department of Gastroenterology and Hematology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Takayuki Matsumoto
- Division of Gastroenterology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Yahaba, Japan
| | - Atsushi Masamune
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, 1-1 Seiryo-Machi, Aoba-Ku, Sendai, Miyagi, 980-8574, Japan
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Oikawa H, Maesawa C, Tatemichi Y, Nishinari Y, Nishiya M, Mizugai H, Ikeda A, Oikawa K, Takikawa Y, Masuda T. A disintegrin and metalloproteinase 17 (ADAM17) mediates epidermal growth factor receptor transactivation by angiotensin II on hepatic stellate cells. Life Sci 2014; 97:137-44. [PMID: 24412389 DOI: 10.1016/j.lfs.2013.12.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [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: 08/07/2013] [Revised: 12/02/2013] [Accepted: 12/18/2013] [Indexed: 02/04/2023]
Abstract
AIMS Epidermal growth factor receptor (EGFR) transactivation induced by angiotensin II (Ang II) participates in the progression of various diseases. A disintegrin and metalloproteinase 17 (ADAM17) is thought to promote renal fibrosis, cardiac hypertrophy with fibrosis and atherosclerosis by activation of the EGFR through secretion of EGFR ligands. The purpose of this study was to investigate whether Ang II-induced EGFR transactivation occurs on hepatic stellate cells (HSCs) and whether the reaction is mediated via ADAM17. MAIN METHODS Ang II-induced EGFR transactivation and cellular proliferation of the human HSC line LI90 were investigated using Western blotting and ATP assay, respectively. Ang II-induced secretion of mature amphiregulin into the cell culture medium was evaluated by enzyme-linked immunosorbent assay (ELISA). KEY FINDINGS An inhibitor of ADAM17, TAPI-1, as well as antagonists of EGFR and angiotensin II type-1 receptor (AT1), attenuated Ang II-induced EGFR transactivation and proliferation of LI90 cells. Furthermore, silencing of ADAM17 inhibited Ang II-induced secretion of mature amphiregulin in addition to EGFR transactivation. SIGNIFICANCE These results indicate that ADAM17 mediates Ang II-induced EGFR transactivation on HSCs, and that this process may participate in the progression of liver fibrosis.
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Affiliation(s)
- Hiroki Oikawa
- Department of Pathology, School of Medicine, Iwate Medical University, 2-1-1 Nishitokuta, Yahaba-Cho, Shiwa-Gun, Iwate 028-3694, Japan.
| | - Chihaya Maesawa
- Department of Pathology, School of Medicine, Iwate Medical University, 2-1-1 Nishitokuta, Yahaba-Cho, Shiwa-Gun, Iwate 028-3694, Japan; Department of Tumor Biology, Institute of Biomedical Science, Iwate Medical University, 2-1-1 Nishitokuta, Yahaba-Cho, Shiwa-Gun, Iwate 028-3694, Japan
| | - Yoshinori Tatemichi
- Department of Internal Medicine, School of Medicine, Iwate Medical University, Uchimaru 19-1, Morioka, Iwate 020-8505, Japan
| | - Yutaka Nishinari
- Department of Tumor Biology, Institute of Biomedical Science, Iwate Medical University, 2-1-1 Nishitokuta, Yahaba-Cho, Shiwa-Gun, Iwate 028-3694, Japan; Department of Surgery, School of Medicine, Iwate Medical University, Uchimaru 19-1, Morioka, Iwate 020-8505, Japan
| | - Masao Nishiya
- Department of Pathology, School of Medicine, Iwate Medical University, 2-1-1 Nishitokuta, Yahaba-Cho, Shiwa-Gun, Iwate 028-3694, Japan
| | - Hisata Mizugai
- Department of Pathology, School of Medicine, Iwate Medical University, 2-1-1 Nishitokuta, Yahaba-Cho, Shiwa-Gun, Iwate 028-3694, Japan; Department of Internal Medicine, School of Medicine, Iwate Medical University, Uchimaru 19-1, Morioka, Iwate 020-8505, Japan
| | - Aya Ikeda
- Department of Pathology, School of Medicine, Iwate Medical University, 2-1-1 Nishitokuta, Yahaba-Cho, Shiwa-Gun, Iwate 028-3694, Japan
| | - Kanta Oikawa
- Department of Internal Medicine, School of Medicine, Iwate Medical University, Uchimaru 19-1, Morioka, Iwate 020-8505, Japan
| | - Yasuhiro Takikawa
- Department of Internal Medicine, School of Medicine, Iwate Medical University, Uchimaru 19-1, Morioka, Iwate 020-8505, Japan
| | - Tomoyuki Masuda
- Department of Pathology, School of Medicine, Iwate Medical University, 2-1-1 Nishitokuta, Yahaba-Cho, Shiwa-Gun, Iwate 028-3694, Japan
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Miura H, Isogai E, Mizugai H, Miura K. Perceived oral health status, oral function and related behaviour among the patients of Behçet's disease. Asia Pac J Public Health 2002; 12:98-101. [PMID: 11836926 DOI: 10.1177/101053950001200208] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The majority of patients with Behçet's disease (BD) suffers from oral ulcers. The aim of the present study was to survey self-rated oral health status, oral function, and oral health behaviour of patients with BD in eastern Japan. Subjects were 33 BD patients and 101 healthy individuals ranging in age from 20 to 59 years. The survey was conducted using a self-administered questionnaire. The items of oral health in the questionnaire included subjective symptoms, self-rated dental problems and oral health behaviour. We found that compared to the healthy subjects, BD patients experienced more severe physical limitations, mainly involving difficulty in pronouncing words (p < 0.01) and the pain of oral mucosa and gingival tissue caused by oral ulcers (p < 0.01). Based on the results of oral health behaviour, BD patients did not behave positively with regard to maintaining oral health including regular tooth brushing despite relatively higher risk of dental diseases that they face. The present results suggest that oral ulcers due to BD induced dental disorder such as the pain of gingiva, oral mucosa, and difficulty in the pronouncing of words. In spite of this, their oral health behaviour is not positive compared to the healthy subjects. Thus, the need to develop a more active pragramme for oral health education for patients with BD is indicated.
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Affiliation(s)
- H Miura
- Department of Speech Therapy, Faculty of Health Science, Kyushu University of Health and Welfare, 1714-1 Yoshino-cho, Nobeoka-shi, Miyazaki 882-8508, Japan.
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Abstract
The present study statistically evaluates the relationship between chewing ability and quality of life (QOL) in elderly Japanese residents. We used a subjective evaluation and a mastication score determined by the food intake status to evaluate chewing ability. The PGC morale scale was used to evaluate the QOL level. The mastication score was significantly related to the QOL level in the subject group (P<0.05). The relationship between the subjective evaluation of chewing ability and the score on the PGC morale scale showed a similar tendency. In the section of the PGC morale scale that assesses agitation, attitude towards own aging, and lonely dissatisfaction, chewing ability was correlated with attitude toward own aging in particular (P<0.05). These results have suggested that the chewing ability is closely related to the QOL of the elderly residing in a rural community in Japan.
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Affiliation(s)
- H Miura
- Department of Speech Therapy, Faculty of Health Sciences, Kyushu University of Health and Welfare, Miyazaki, Japan.
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Abstract
In this study, we examined the effects of selected environmental factors on the adhesion of Porphyromonas gingivalis fimbriae, an important structure involved in attachment of the bacteria to human gingival cells. The human gingival carcinoma cell line Ca9-22 was grown in microculture plates, and adherence was detected by use of 125I-labeled fimbriae. Adhesion was increased by changes in pH from 7.0-8.0, but was decreased by increase in the sodium chloride concentration above 0.15 M. Trypsin treatment of Ca9-22 cells also augmented adhesion of the fimbriae to the cells. These results indicate that fimbrial adhesion to gingival cells is controlled by various environmental factors, and the data on trypsin treatment suggest that elevated levels of protease in the gingival sulcus, such as can occur with poor oral hygiene and gingivitis, may expose adhesion molecules on the gingival cell surface, thereby promoting the attachment of P. gingivalis fimbriae.
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Affiliation(s)
- K Hirose
- Department of Preventive Dentistry, School of Dentistry, Health Sciences University of Hokkaido, Japan
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Hirose K, Isogai E, Mizugai H, Miura H, Ueda I. Inductive effect of Porphyromonas gingivalis fimbriae on differentiation of human monocytic tumor cell line U937. Oral Microbiol Immunol 1996; 11:62-4. [PMID: 8604257 DOI: 10.1111/j.1399-302x.1996.tb00338.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
This study used the human monocytic tumor cell line U937 to examine whether Porphyromonas gingivalis fimbriae induce differentiation of monocyte/macrophage progenitors. When the progenitor cells were incubated with P. gingivalis fimbriae, the incubation resulted in increased Fc rosette formation and increased CD11b production by the cells. The presence of a protein kinase C inhibitor, H7 or calphostin C, in the medium eliminated the stimulatory effects of P. gingivalis fimbriae on Fc rosette formation. Furthermore, CD11b expression was inhibited by calphostin C. In contrast, HA1004 , an inhibitor of cyclic nucleotide-dependent protein kinase, had no effect on P. gingivalis fimbriae-induced Fc rosette formation or CD11b expression. These results demonstrate that P. gingivalis fimbriae are a potent inducer of the differentiation of the monocyte/macrophage tumor cell line U937, most probably via cyclic nucleotide-independent protein kinase C.
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Affiliation(s)
- K Hirose
- Department of Preventive Dentistry, Health Sciences University of Hokkaido, Japan
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