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Nitta H, Mizumoto M, Li Y, Oshiro Y, Fukushima H, Suzuki R, Hosaka S, Saito T, Numajiri H, Kawano C, Kamizawa S, Maruo K, Sakurai H. An analysis of muscle growth after proton beam therapy for pediatric cancer. J Radiat Res 2024; 65:251-255. [PMID: 38265112 PMCID: PMC10959433 DOI: 10.1093/jrr/rrad105] [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] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 11/20/2023] [Indexed: 01/25/2024]
Abstract
Retardation of growth and development is a well-known late effect after radiotherapy for pediatric patients. The goal of the study was to examine the effect of proton beam therapy (PBT) on the growth of muscles included in the irradiated area. The subjects were 17 pediatric patients (age ≤ 5 years) who received PBT with a treatment field including a muscle on only one side out of a pair of symmetrical bilateral muscles and had imaging evaluations for at least 1 year after PBT. The thicknesses of the irradiated and non-irradiated (contralateral) muscles were measured retrospectively on CT or MRI axial images collected before and after PBT. The change of thickness divided by the period (years) for each muscle was compared between the irradiated and contralateral sides. Correlations of muscle growth with irradiation dose and age at the start of treatment were also evaluated. The median observation period was 39.2 months. The measurement sites included the erector spinae (n = 9), gluteus maximus (n = 5) and rhomboids + trapezius (n = 3) muscles. The average changes in muscle thickness were 0.24 mm/year on the irradiated side and 1.19 mm/year on the contralateral side, showing significantly reduced growth on the irradiated side (P = 0.001). Younger patients had greater muscle growth. Irradiation dose was not significant, but muscle growth tended to decrease as the dose increased, and muscles irradiated at >50 Gy (RBE) showed little growth. These results show that muscle growth is affected by PBT and that long-term follow-up is needed to evaluate muscle growth retardation.
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Affiliation(s)
- Hazuki Nitta
- Department of Radiation Oncology, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8575, Japan
| | - Masashi Mizumoto
- Department of Radiation Oncology, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8575, Japan
| | - Yinuo Li
- Department of Radiation Oncology, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8575, Japan
| | - Yoshiko Oshiro
- Department of Radiation Oncology, Tsukuba Medical Center Hospital, 1-3-1 Amakubo, Tsukuba, Ibaraki, 305-8558, Japan
| | - Hiroko Fukushima
- Department of Pediatrics, University of Tsukuba Hospital, 2-1-1 Amakubo, Tsukuba, Ibaraki, 305-8576, Japan
- Department of Child Health, Institute of Medicine, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8575, Japan
| | - Ryoko Suzuki
- Department of Pediatrics, University of Tsukuba Hospital, 2-1-1 Amakubo, Tsukuba, Ibaraki, 305-8576, Japan
- Department of Child Health, Institute of Medicine, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8575, Japan
| | - Sho Hosaka
- Department of Pediatrics, University of Tsukuba Hospital, 2-1-1 Amakubo, Tsukuba, Ibaraki, 305-8576, Japan
| | - Takashi Saito
- Department of Radiation Oncology, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8575, Japan
| | - Haruko Numajiri
- Department of Radiation Oncology, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8575, Japan
| | - Chie Kawano
- Department of Radiation Oncology, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8575, Japan
| | - Satoshi Kamizawa
- Department of Radiation Oncology, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8575, Japan
| | - Kazushi Maruo
- Department of Biostatistics, Institute of Medicine, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8575, Japan
| | - Hideyuki Sakurai
- Department of Radiation Oncology, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8575, Japan
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Li Y, Mizumoto M, Oshiro Y, Nitta H, Saito T, Iizumi T, Kawano C, Yamaki Y, Fukushima H, Hosaka S, Maruo K, Kamizawa S, Sakurai H. A Retrospective Study of Renal Growth Changes after Proton Beam Therapy for Pediatric Malignant Tumor. Curr Oncol 2023; 30:1560-1570. [PMID: 36826081 PMCID: PMC9955816 DOI: 10.3390/curroncol30020120] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 01/12/2023] [Accepted: 01/20/2023] [Indexed: 01/26/2023] Open
Abstract
The purpose of this study was to analyze renal late effects after proton beam therapy (PBT) for pediatric malignant tumors. A retrospective study was performed in 11 patients under 8 years of age who received PBT between 2013 and 2018. The kidney was exposed in irradiation of the primary lesion in all cases. Kidney volume and contour were measured on CT or MRI. Dose volume was calculated with a treatment-planning system. The median follow-up was 24 months (range, 11-57 months). In irradiated kidneys and control contralateral kidneys, the median volume changes were -5.63 (-20.54 to 7.20) and 5.23 (-2.01 to 16.73) mL/year; and the median % volume changes at 1 year were -8.55% (-47.52 to 15.51%) and 9.53% (-2.13 to 38.78%), respectively. The median relative volume change for irradiated kidneys at 1 year was -16.42% (-52.21 to -4.53%) relative to control kidneys. Kidneys irradiated with doses of 10, 20, 30, 40, and 50 GyE had volume reductions of 0.16%, 0.90%, 1.24%, 2.34%, and 8.2% per irradiated volume, respectively. The larger the irradiated volume, the greater the kidney volume was lost. Volume reduction was much greater in patients aged 4-7 years than in those aged 2-3 years. The results suggest that kidneys exposed to PBT in treatment of pediatric malignant tumor show continuous atrophy in follow-up. The degree of atrophy is increased with a higher radiation dose, greater irradiated volume, and older age. However, with growth and maturation, the contralateral kidney becomes progressively larger and is less affected by radiation.
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Affiliation(s)
- Yinuo Li
- Department of Radiation Oncology, University of Tsukuba Hospital, Tsukuba 305-8576, Japan
| | - Masashi Mizumoto
- Department of Radiation Oncology, University of Tsukuba Hospital, Tsukuba 305-8576, Japan
- Correspondence: ; Tel.: +81-29-853-7100; Fax: +81-29-853-7102
| | - Yoshiko Oshiro
- Department of Radiation Oncology, University of Tsukuba Hospital, Tsukuba 305-8576, Japan
| | - Hazuki Nitta
- Department of Radiation Oncology, University of Tsukuba Hospital, Tsukuba 305-8576, Japan
| | - Takashi Saito
- Department of Radiation Oncology, University of Tsukuba Hospital, Tsukuba 305-8576, Japan
| | - Takashi Iizumi
- Department of Radiation Oncology, University of Tsukuba Hospital, Tsukuba 305-8576, Japan
| | - Chie Kawano
- Department of Radiation Oncology, University of Tsukuba Hospital, Tsukuba 305-8576, Japan
| | - Yuni Yamaki
- Department of Pediatrics, University of Tsukuba Hospital, Tsukuba 305-8576, Japan
| | - Hiroko Fukushima
- Department of Pediatrics, University of Tsukuba Hospital, Tsukuba 305-8576, Japan
| | - Sho Hosaka
- Department of Pediatrics, University of Tsukuba Hospital, Tsukuba 305-8576, Japan
| | - Kazushi Maruo
- Department of Biostatistics, Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan
| | - Satoshi Kamizawa
- Department of Radiation Oncology, University of Tsukuba Hospital, Tsukuba 305-8576, Japan
| | - Hideyuki Sakurai
- Department of Radiation Oncology, University of Tsukuba Hospital, Tsukuba 305-8576, Japan
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Sawada K, Nitta H, Nakamura Y, Okamoto W, Taniguchi H, Komatsu Y, Hara H, Kato T, Nishina T, Ohta T, Esaki T, Yoshino T, Fujii S. 1705P HER2 intratumoral genetic and non-genetic heterogeneity in metastatic colorectal cancer. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.1783] [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: 11/26/2022] Open
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Isagawa S, Shiohira H, Hokama N, Nitta H, Yoshida T, Masamoto H, Aoki Y, Nakamura K. Measurement of zinc concentration in blood and breast milk of a Wilson's disease patient taking zinc acetate. Pharmazie 2021; 75:177-178. [PMID: 32393423 DOI: 10.1691/ph.2020.9765] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
Abstract
Case: A 27-year-old, gravida 2, para 0, Japanese female who was maintained on zinc acetate (75 mg/day) during pregnancy expressed her desire to breastfeed after birth. We investigated the possibility of breastfeeding while on treatment. Breast milk zinc concentrations were determined using an atomic absorption photometer. Breast milk zinc concentrations on the 4th (colostrum) and 32nd (post-colostrum) days post partum were 10.80 μg/mL and 3.28 μg/mL, respectively. These values are less than the reported range of breast milk zinc concentrations in Japanese women who are not under any medication. Conclusion: We measured blood and breast milk zinc concentrations of a patient with Wilson's disease who was taking zinc acetate (75 mg/day). Zinc values were within the range of breast milk concentrations of mothers who are not on zinc acetate.
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Affiliation(s)
- S Isagawa
- Department of Pharmacy, University of the Ryukyus Hospital, Okinawa, Japan
| | - H Shiohira
- Department of Pharmacy, University of the Ryukyus Hospital, Okinawa, Japan
| | - N Hokama
- Department of Pharmacy, University of the Ryukyus Hospital, Okinawa, Japan
| | - H Nitta
- Department of Obstetrics and Gynecology, Graduate School of Medicine, University of the Ryukyus, Okinawa, Japan
| | - T Yoshida
- Department of Pediatrics, Faculty of Medicine, University of the Ryukyus, Okinawa, Japan
| | - H Masamoto
- Department of Obstetrics and Gynecology, Graduate School of Medicine, University of the Ryukyus, Okinawa, Japan
| | - Y Aoki
- Department of Obstetrics and Gynecology, Graduate School of Medicine, University of the Ryukyus, Okinawa, Japan
| | - K Nakamura
- Department of Pharmacy, University of the Ryukyus Hospital, Okinawa, Japan;,
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Suto H, Kamei K, Kato H, Misawa T, Unno M, Nitta H, Satoi S, Kawabata Y, Ohtsuka M, Rikiyama T, Sudo T, Matsumoto I, Hirao T, Okano K, Suzuki Y, Sata N, Isaji S, Sugiyama M, Takeyama Y. Diabetic control and nutritional status up to 1 year after total pancreatectomy: a nationwide multicentre prospective study. Br J Surg 2021; 108:e237-e238. [PMID: 33821972 DOI: 10.1093/bjs/znab097] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 01/20/2021] [Accepted: 02/18/2021] [Indexed: 01/09/2023]
Affiliation(s)
- H Suto
- Department of Gastroenterological Surgery, Kagawa University, Kagawa, Japan
| | - K Kamei
- Department of Surgery, Kindai University, Osaka, Japan
| | - H Kato
- Department of Hepatobiliary Pancreatic and Transplant Surgery, Mie University Graduate School of Medicine, Mie, Japan
| | - T Misawa
- Department of Surgery, The Jikei University Kashiwa Hospital, Chiba, Japan
| | - M Unno
- Department of Surgery, Tohoku University, Miyagi, Japan
| | - H Nitta
- Department of Surgery, Iwate Medical University, Iwate, Japan
| | - S Satoi
- Department of Surgery, Kansai Medical University, Osaka, Japan
| | - Y Kawabata
- Department of Digestive and General Surgery, Faculty of Medicine, Shimane University, Shimane, Japan
| | - M Ohtsuka
- Department of General Surgery, Chiba University, Chiba, Japan
| | - T Rikiyama
- Department of Surgery, Saitama Medical Centre, Jichi Medical University, Saitama, Japan
| | - T Sudo
- Department of Surgery, Kure Medical Centre and Chugoku Cancer Centre, Hiroshima, Japan
| | - I Matsumoto
- Department of Surgery, Kindai University, Osaka, Japan
| | - T Hirao
- Department of Public Health, Kagawa University, Kagawa, Japan
| | - K Okano
- Department of Gastroenterological Surgery, Kagawa University, Kagawa, Japan
| | - Y Suzuki
- Department of Gastroenterological Surgery, Kagawa University, Kagawa, Japan
| | - N Sata
- Department of Surgery, Jichi Medical University, Tochigi, Japan
| | - S Isaji
- Director of Mie University Hospital, Mie, Japan
| | - M Sugiyama
- Director of Tokyo Rosai Hospital, Tokyo, Japan
| | - Y Takeyama
- Department of Surgery, Kindai University, Osaka, Japan
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Le SH, Tonami K, Umemori S, Nguyen LB, Ngo LQ, Araki K, Nitta H. Relationship between preoperative dental anxiety and short-term inflammatory response following oral surgery. Aust Dent J 2020; 66:13-19. [PMID: 32989884 DOI: 10.1111/adj.12796] [Citation(s) in RCA: 5] [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: 09/20/2020] [Indexed: 11/28/2022]
Abstract
BACKGROUND The relationship between dental anxiety and mucosal wound healing, especially the inflammatory response, has not been well studied. This study aimed to examine the relationship between anxiety prior to dental treatment and short-term inflammation following impacted mandibular third molar (IMTM) surgery. METHODS Fifty-nine patients who required IMTM surgery were recruited for this study. Sample demographics (gender, age) and surgical extent (Pederson classification, duration) were collected. Psychological stress towards surgery was assessed by the Dental Fear Survey (DFS). All surgeries were conducted according to an identical surgical protocol and all patients were given the same medical prescription. Correlations between short-term inflammation (swelling and trismus after 2 days) and DFS, demographics and surgical extent were statistically analysed. RESULTS The results showed that patients with a higher DFS score demonstrated more severe swelling (β = 0.36, P = 0.016) and trismus (β = 0.37, P = 0.008) 2 days after surgery. In addition, more severe trismus occurred following more difficult surgery (β = 0.29, P = 0.016) or that with a longer duration (β = 0.21, P = 0.081). Neither gender nor age showed any significant relationship with swelling or trismus. CONCLUSION Short-term inflammatory response following IMTM surgery correlated with the preoperative dental anxiety and this correlation was independent of gender and surgical extent.
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Affiliation(s)
- S H Le
- Department of Oral Surgery, Faculty of Odonto-Stomatology, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - K Tonami
- Oral Diagnosis and General Dentistry, Dental Hospital, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - S Umemori
- Oral Diagnosis and General Dentistry, Dental Hospital, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Lt-B Nguyen
- Department of Oral Surgery, Faculty of Odonto-Stomatology, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Lt-Q Ngo
- Department of Dental Basic Sciences, Faculty of Odonto-Stomatology, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - K Araki
- Department of Educational System in Dentistry, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - H Nitta
- Oral Diagnosis and General Dentistry, Dental Hospital, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
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Michikawa T, Yamazaki S, Shimizu A, Nitta H, Kato K, Nishiwaki Y, Morokuma S. Exposure to Asian dust within a few days of delivery is associated with placental abruption in Japan: a case-crossover study. BJOG 2019; 127:335-342. [PMID: 31654606 DOI: 10.1111/1471-0528.15999] [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] [Accepted: 10/21/2019] [Indexed: 11/25/2022]
Abstract
OBJECTIVE Asian dust is a natural phenomenon in which dust particles are transported from desert areas in China and Mongolia to East Asia. Short-term exposure to Asian dust has been associated with cardiovascular disease through mechanisms such as systemic inflammation. Because inflammation is a potential trigger of placental abruption, exposure may also lead to abruption. We examined whether exposure to Asian dust was associated with abruption. DESIGN A bi-directional, time-stratified case-crossover design. SETTING AND POPULATION From the Japan Perinatal Registry Network database, we identified 3014 patients who delivered singleton births in hospitals in nine Japanese prefectures from 2009 to 2014 with a diagnosis of placental abruption. METHODS Asian dust levels were measured at Light Detection and Ranging monitoring stations, and these measurements were used to define the Asian dust days. As there was no information on the onset day of abruption, we assumed this day was the day before delivery (lag1). MAIN OUTCOME MEASURES Placental abruption. RESULTS During the study period, the Asian dust days ranged from 15 to 71 days, depending on the prefecture. The adjusted odds ratio of placental abruption associated with exposure to Asian dust was 1.4 (95% confidence interval = 1.0, 2.0) for cumulative lags of 1-2 days. Even after adjustment for co-pollutant exposures, this association did not change substantially. CONCLUSIONS In this Japanese multi-area study, exposure to Asian dust was associated with an increased risk of placental abruption. TWEETABLE ABSTRACT Exposure to environmental factors such as Asian dust may be a trigger of placental abruption.
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Affiliation(s)
- T Michikawa
- Department of Environmental and Occupational Health, School of Medicine, Toho University, Tokyo, Japan.,Centre for Health and Environmental Risk Research, National Institute for Environmental Studies, Tsukuba, Japan
| | - S Yamazaki
- Centre for Health and Environmental Risk Research, National Institute for Environmental Studies, Tsukuba, Japan
| | - A Shimizu
- Centre for Regional Environmental Research, National Institute for Environmental Studies, Tsukuba, Japan
| | - H Nitta
- Centre for Health and Environmental Risk Research, National Institute for Environmental Studies, Tsukuba, Japan
| | - K Kato
- Department of Obstetrics and Gynaecology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Y Nishiwaki
- Department of Environmental and Occupational Health, School of Medicine, Toho University, Tokyo, Japan
| | - S Morokuma
- Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Shiraishi Y, Imai K, Yamashita YI, Nakao Y, Nakagawa S, Okabe H, Nitta H, Chikamoto A, Baba H. Hepatobiliary and Pancreatic: Segmental arterial mediolysis of pancreaticoduodenal artery accompanied by acute pancreatitis and duodenal obstruction. J Gastroenterol Hepatol 2018; 33:1564-1564. [PMID: 29691909 DOI: 10.1111/jgh.14138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Affiliation(s)
- Y Shiraishi
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - K Imai
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Y-I Yamashita
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Y Nakao
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - S Nakagawa
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - H Okabe
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - H Nitta
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - A Chikamoto
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - H Baba
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
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Nitta H, Horii R, Murillo A, Portier B, Akiyama F. Abstract P2-06-02: Breast cancer HER2 epigenetic intratumoral heterogeneity results from lack of HER2 protein translation. Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-p2-06-02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Research objective
Previously, we reported the negative correlation between pathological complete response (pCR) and HER2 positive breast cancer exhibiting amplified HER2 gene tumor cells without HER2 protein overexpression (HER2 epigenetic intratumoral heterogeneity) among trastuzumab-based neoadjuvant chemotherapy treated patients. Our objective in this study was to elucidate if tumor cells with HER2 epigenetic intratumoral heterogeneity express HER2 RNA using a HER2 RNA in situ hybridization (ISH) method.
Materials and methods
Formalin-fixed, paraffin-embedded (FFPE) sections of breast cancer biopsy samples were investigated for HER2 RNA expression at the individual cell level using a HER2 RNA ISH assay. RNA preservation in tissue sections was examined using a peptidylprolyl isomerase B (PPIB) RNA ISH assay.
Three groups of cases were examined:
1) HER2 negative breast cancer cases (HER2 RNA ISH negative control group).
2) HER2 positive breast cancer cases with homogeneous HER2 positive tumor cells (HER2 RNA ISH positive control; pCR group)
3) HER2 positive breast cancer cases with HER2 epigenetic intratumoral heterogeneity (a mixture of HER2 gene and protein positive tumor cells and HER2 gene positive tumor cells without HER2 protein expression; incomplete response group)
Consecutive sections of HER2 RNA ISH slides were stained for HER2 gene and protein concurrently on the same tissue section using HER2 gene-protein assay (GPA) which is a combination of FDA-approved HER2 immunohistochemical (HER2 protein) and HER2 dual ISH (HER2 gene and chromosome 17 centromere) assays. Analyses of HER2 RNA expression in individual cells was microscopically evaluated and matched to HER2 GPA slides.
Results
RNA preservation was confirmed in tissue sections of all three groups by a PPIB RNA ISH assay. Tumor cells of HER2 negative breast cancer cases (negative control group) lacked HER2 RNA ISH signal while HER2 gene and protein positive tumor cells of homogeneous breast cancer cases (positive control group) demonstrated high HER2 RNA expression levels. HER2 gene and protein positive tumor cells of HER2 positive intratumoral heterogeneity cases showed high HER2 RNA expression. However, amplified HER2 gene breast cancer cells without HER2 protein overexpression of HER2 positive intratumoral heterogeneity cases also showed high levels of HER2 RNA expression. Thus, revealing in cases with intratumoral heterogeneity, transcription of HER2 RNA occurs, but translation of HER2 protein is altered by some mechanism(s) in tumor cells.
Conclusions
Transcription of HER2 RNA was observed in breast tumor cells with amplified HER2 gene but absence of HER2 protein overexpression (HER2 epigenetic intratumoral heterogeneity) of patients who showed incomplete response to neoadjuvant trastuzumab therapy. Our study suggests that inconsistent HER2 protein translation in breast cancer with HER2 epigenetic heterogeneity might be the primary resistance mechanism to trastuzumab-based neoadjuvant chemotherapy.
Citation Format: Nitta H, Horii R, Murillo A, Portier B, Akiyama F. Breast cancer HER2 epigenetic intratumoral heterogeneity results from lack of HER2 protein translation [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P2-06-02.
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Affiliation(s)
- H Nitta
- Ventana Medical Systems, Inc., Tucson, AZ; Japanese Foundation for Cancer Research, Tokyo, Japan
| | - R Horii
- Ventana Medical Systems, Inc., Tucson, AZ; Japanese Foundation for Cancer Research, Tokyo, Japan
| | - A Murillo
- Ventana Medical Systems, Inc., Tucson, AZ; Japanese Foundation for Cancer Research, Tokyo, Japan
| | - B Portier
- Ventana Medical Systems, Inc., Tucson, AZ; Japanese Foundation for Cancer Research, Tokyo, Japan
| | - F Akiyama
- Ventana Medical Systems, Inc., Tucson, AZ; Japanese Foundation for Cancer Research, Tokyo, Japan
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Akiyama Y, Iwaya T, Endo F, Shioi Y, Chiba T, Takahara T, Otsuka K, Nitta H, Koeda K, Mizuno M, Kimura Y, Sasaki A. Stability of cervical esophagogastrostomy via hand-sewn anastomosis after esophagectomy for esophageal cancer. Dis Esophagus 2017; 30:1-7. [PMID: 28375439 DOI: 10.1093/dote/dow007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [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] [Indexed: 12/11/2022]
Abstract
The aim of the present study is to evaluate the outcome of hand-sewn esophagogastric anastomosis during radical esophagectomy for esophageal cancer. The outcomes of 467 consecutive esophageal cancer patients who underwent cervical esophagogastric anastomosis using interrupted and double-layered sutures after radical esophagectomy via right thoracotomy or thoracoscopic surgery were retrospectively reviewed. Anastomotic leakage, including conduit necrosis, occurred in 11 of 467 patients (2.4%); 7 of 11 (63.6%) cases experienced only minor leakage, whereas the other four (36.4%) patients had major leakage that required surgical or radiologic intervention, including two patients of conduit necrosis. Anastomotic leakages were more frequently observed after retrosternal reconstruction compared with the posterior mediastinal route (P < 0.0001). The median time to healing of leakage was 40 days (range: 14-97 days). Two patients (2/467, 0.4%) died in the hospital due to sepsis caused by the leakage and conduit necrosis. Twelve patients (2.6%) developed anastomotic stenosis, which was improved by dilatation in all patients. Hand-sewn cervical esophagogastric anastomosis is a stable and highly safe method of radical esophagectomy for esophageal cancer.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Y Kimura
- Department of Palliative Medicine, Iwate Medical University School of Medicine, Iwate, Japan
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Kimura T, Otsuka K, Yaegashi M, Hakozaki M, Matuo T, Fujii H, Sato K, Kamishima M, Miyake T, Takahara T, Akiyama Y, Iwaya T, Nishizuka S, Nitta H, Koeda K, Mizuno M, Kimura Y, Sasaki A. 529P Exploratory study for preventing nausea and vomiting by switching from pranisetron + dexamethasone (Days 1–3) + aprepitant (Days 1–3) to palonosetron + pexamethasone (Day 1) in patients undergoing moderately emetogenic chemotherapy. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw599.008] [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: 11/13/2022] Open
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Katagiri H, Kushida Y, Nojima M, Kuroda Y, Wakao S, Ishida K, Endo F, Kume K, Takahara T, Nitta H, Tsuda H, Dezawa M, Nishizuka SS. A Distinct Subpopulation of Bone Marrow Mesenchymal Stem Cells, Muse Cells, Directly Commit to the Replacement of Liver Components. Am J Transplant 2016; 16:468-83. [PMID: 26663569 DOI: 10.1111/ajt.13537] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [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: 11/03/2014] [Revised: 08/23/2015] [Accepted: 09/06/2015] [Indexed: 01/25/2023]
Abstract
Genotyping graft livers by short tandem repeats after human living-donor liver transplantation (n = 20) revealed the presence of recipient or chimeric genotype cases in hepatocytes (6 of 17, 35.3%), sinusoidal cells (18 of 18, 100%), cholangiocytes (15 of 17, 88.2%) and cells in the periportal areas (7 of 8, 87.5%), suggesting extrahepatic cell involvement in liver regeneration. Regarding extrahepatic origin, bone marrow mesenchymal stem cells (BM-MSCs) have been suggested to contribute to liver regeneration but compose a heterogeneous population. We focused on a more specific subpopulation (1-2% of BM-MSCs), called multilineage-differentiating stress-enduring (Muse) cells, for their ability to differentiate into liver-lineage cells and repair tissue. We generated a physical partial hepatectomy model in immunodeficient mice and injected green fluorescent protein (GFP)-labeled human BM-MSC Muse cells intravenously (n = 20). Immunohistochemistry, fluorescence in situ hybridization and species-specific polymerase chain reaction revealed that they integrated into regenerating areas and expressed liver progenitor markers during the early phase and then differentiated spontaneously into major liver components, including hepatocytes (≈74.3% of GFP-positive integrated Muse cells), cholangiocytes (≈17.7%), sinusoidal endothelial cells (≈2.0%), and Kupffer cells (≈6.0%). In contrast, the remaining cells in the BM-MSCs were not detected in the liver for up to 4 weeks. These results suggest that Muse cells are the predominant population of BM-MSCs that are capable of replacing major liver components during liver regeneration.
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Affiliation(s)
- H Katagiri
- Molecular Therapeutics Laboratory, Iwate Medical University School of Medicine, Morioka, Japan.,Department of Surgery, Iwate Medical University School of Medicine, Morioka, Japan
| | - Y Kushida
- Department of Anatomy and Anthropology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - M Nojima
- Department of Stem Cell Biology and Histology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Y Kuroda
- Department of Anatomy and Anthropology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - S Wakao
- Department of Stem Cell Biology and Histology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - K Ishida
- Molecular Therapeutics Laboratory, Iwate Medical University School of Medicine, Morioka, Japan.,Department of Surgery, Iwate Medical University School of Medicine, Morioka, Japan
| | - F Endo
- Molecular Therapeutics Laboratory, Iwate Medical University School of Medicine, Morioka, Japan.,Department of Surgery, Iwate Medical University School of Medicine, Morioka, Japan
| | - K Kume
- Molecular Therapeutics Laboratory, Iwate Medical University School of Medicine, Morioka, Japan.,Department of Surgery, Iwate Medical University School of Medicine, Morioka, Japan.,Institute for Biomedical Sciences, Iwate Medical University, Yahaba, Japan.,Medical Innovation by Advanced Science and Technology Program, Iwate Medical University, Morioka, Japan
| | - T Takahara
- Department of Surgery, Iwate Medical University School of Medicine, Morioka, Japan
| | - H Nitta
- Department of Surgery, Iwate Medical University School of Medicine, Morioka, Japan
| | - H Tsuda
- Diagnostic Pathology Section, Clinical Laboratory Division, National Cancer Center Hospital, Tokyo, Japan
| | - M Dezawa
- Department of Anatomy and Anthropology, Tohoku University Graduate School of Medicine, Sendai, Japan.,Department of Stem Cell Biology and Histology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - S S Nishizuka
- Molecular Therapeutics Laboratory, Iwate Medical University School of Medicine, Morioka, Japan.,Department of Surgery, Iwate Medical University School of Medicine, Morioka, Japan.,Institute for Biomedical Sciences, Iwate Medical University, Yahaba, Japan.,Medical Innovation by Advanced Science and Technology Program, Iwate Medical University, Morioka, Japan.,Department of Surgery, Iwate Medical University School of Dentistry, Morioka, Japan.,Iwate Tohoku Medical Megabank Organization, Iwate Medical University, Yahaba, Japan
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13
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Daitoku N, Okabe H, Hashimoto D, Chikamoto A, Hayashi H, Nitta H, Taki K, Higashi T, Kaida T, Arima K, Ishiko T, Beppu T, Baba H. Education and Imaging. Hepatobiliary and Pancreatic: Replaced common hepatic artery on left gastric artery: a rare anomaly and implication for pancreaticoduodenectomy. J Gastroenterol Hepatol 2015; 30:1695. [PMID: 26768946 DOI: 10.1111/jgh.12968] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Affiliation(s)
- N Daitoku
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - H Okabe
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - D Hashimoto
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - A Chikamoto
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - H Hayashi
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - H Nitta
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - K Taki
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Higashi
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Kaida
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - K Arima
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Ishiko
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Beppu
- Department of Multidisciplinary Treatment for Gastroenterological Cancer, Kumamoto University Hospital, Kumamoto, Japan
| | - H Baba
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
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14
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Nishimura N, Terui Y, Inoue N, Takahashi A, Tsuyama N, Gunji M, Nitta H, Ueda K, Mishima Y, Yokoyama M, Takeuchi K, Terui Y, Hatake K. Multiple myeloma as a second primary malignancy; one fourth of patients had prior history of other malignances. Clinical Lymphoma Myeloma and Leukemia 2015. [DOI: 10.1016/j.clml.2015.07.292] [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] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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15
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Okabe H, Hashimoto D, Chikamoto A, Hayashi H, Nitta H, Taki K, Higashi T, Arima K, Ishiko T, Beppu T, Baba H. Hepatobiliary and Pancreatic: Skin metastases from cholangiocarcinoma mimicking herpes zoster. J Gastroenterol Hepatol 2015. [PMID: 26211694 DOI: 10.1111/jgh.12964] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Affiliation(s)
- H Okabe
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - D Hashimoto
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - A Chikamoto
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - H Hayashi
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - H Nitta
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - K Taki
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Higashi
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - K Arima
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Ishiko
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - T Beppu
- Department of Multidisciplinary Treatment for Gastroenterological Cancer, Kumamoto University Hospital, Kumamoto, Japan
| | - H Baba
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, Kumamoto, Japan
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Arima K, Chikamoto A, Hashimoto D, Kaida T, Higashi T, Taki K, Takeyama H, Okabe H, Nitta H, Hayashi H, Beppu T, Baba H. Education and Imaging. Hepatology: Hepatocellular carcinoma with duodenal metastasis. J Gastroenterol Hepatol 2015; 30:1115. [PMID: 26094663 DOI: 10.1111/jgh.12868] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Affiliation(s)
- K Arima
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - A Chikamoto
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - D Hashimoto
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - T Kaida
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - T Higashi
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - K Taki
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - H Takeyama
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - H Okabe
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - H Nitta
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - H Hayashi
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - T Beppu
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - H Baba
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
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17
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Kuroki H, Hayashi H, Nakagawa S, Sakamoto K, Higashi T, Nitta H, Hashimoto D, Chikamoto A, Beppu T, Baba H. Effect of LSKL peptide on thrombospondin 1-mediated transforming growth factor β signal activation and liver regeneration after hepatectomy in an experimental model. Br J Surg 2015; 102:813-25. [PMID: 25866938 PMCID: PMC4654236 DOI: 10.1002/bjs.9765] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [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: 04/26/2014] [Revised: 07/24/2014] [Accepted: 12/04/2014] [Indexed: 12/16/2022]
Abstract
Background A strategy for accelerating liver regeneration after hepatectomy would offer great benefits in preventing postoperative liver failure and improving surgical outcomes. Transforming growth factor (TGF) β is a potent inhibitor of hepatocyte proliferation. Recently, thrombospondin (TSP) 1 has been identified as a negative regulator of liver regeneration by activation of local TGF-β signals. This study aimed to clarify whether the LSKL (leucine–serine–lysine–leucine) peptide, which inhibits TSP-1-mediated TGF-β activation, promotes liver regeneration after hepatectomy in mice. Methods Mice were operated on with a 70 per cent hepatectomy or sham procedure. Operated mice received either LSKL peptide or normal saline intraperitoneally at abdominal closure and 6 h after hepatectomy. Perioperative plasma TSP-1 levels were measured by enzyme-linked immunosorbent assay in patients undergoing hepatectomy. Results Administration of LSKL peptide attenuated Smad2 phosphorylation at 6 h. S-phase entry of hepatocytes was accelerated at 24 and 48 h by LSKL peptide, which resulted in faster recovery of the residual liver and bodyweight. Haematoxylin and eosin tissue staining and blood biochemical examinations revealed no significant adverse effects following the two LSKL peptide administrations. In the clinical setting, plasma TSP-1 levels were lowest on the first day after hepatectomy. However, plasma TSP-1 levels at this stage were significantly higher in patients with subsequent liver dysfunction compared with levels in those without liver dysfunction following hepatectomy. Conclusion Only two doses of LSKL peptide during the early period after hepatectomy can promote liver regeneration. The transient inhibition of TSP-1/TGF-β signal activation using LSKL peptide soon after hepatectomy may be a promising strategy to promote subsequent liver regeneration.
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Affiliation(s)
- H Kuroki
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860–8556, Japan
| | - H Hayashi
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860–8556, Japan
| | - S Nakagawa
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860–8556, Japan
| | - K Sakamoto
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860–8556, Japan
| | - T Higashi
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860–8556, Japan
| | - H Nitta
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860–8556, Japan
| | - D Hashimoto
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860–8556, Japan
| | - A Chikamoto
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860–8556, Japan
| | - T Beppu
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860–8556, Japan
| | - H Baba
- Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860–8556, Japan
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18
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Okabe H, Ishimoto T, Mima K, Nakagawa S, Hayashi H, Kuroki H, Imai K, Nitta H, Saito S, Hashimoto D, Chikamoto A, Ishiko T, Watanabe M, Nagano O, Beppu T, Saya H, Baba H. CD44s signals the acquisition of the mesenchymal phenotype required for anchorage-independent cell survival in hepatocellular carcinoma. Br J Cancer 2013; 110:958-66. [PMID: 24300972 PMCID: PMC3929866 DOI: 10.1038/bjc.2013.759] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [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: 08/10/2013] [Revised: 09/24/2013] [Accepted: 11/11/2013] [Indexed: 12/11/2022] Open
Abstract
Background: Circulating tumour cells (CTCs) have an important role in metastatic processes, but details of their basic characteristics remain elusive. We hypothesised that CD44-expressing CTCs show a mesenchymal phenotype and high potential for survival in hepatocellular carcinoma (HCC). Methods: Circulating CD44+CD90+ cells, previously shown to be tumour-initiating cells, were sorted from human blood and their genetic characteristics were compared with those of tumour cells from primary tissues. The mechanism underlying the high survival potential of CD44-expressing cells in the circulatory system was investigated in vitro. Results: CD44+CD90+ cells in the blood acquired epithelial–mesenchymal transition, and CD44 expression remarkably increased from the tissue to the blood. In Li7 and HLE cells, the CD44high population showed higher anoikis resistance and sphere-forming ability than did the CD44low population. This difference was found to be attributed to the upregulation of Twist1 and Akt signal in the CD44high population. Twist1 knockdown showed remarkable reduction in anoikis resistance, sphere formation, and Akt signal in HLE cells. In addition, mesenchymal markers and CD44s expression were downregulated in the Twist1 knockdown. Conclusions: CD44s symbolises the acquisition of a mesenchymal phenotype regulating anchorage-independent capacity. CD44s-expressing tumour cells in peripheral blood are clinically important therapeutic targets in HCC.
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Affiliation(s)
- H Okabe
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan
| | - T Ishimoto
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan
| | - K Mima
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan
| | - S Nakagawa
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan
| | - H Hayashi
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan
| | - H Kuroki
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan
| | - K Imai
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan
| | - H Nitta
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan
| | - S Saito
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan
| | - D Hashimoto
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan
| | - A Chikamoto
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan
| | - T Ishiko
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan
| | - M Watanabe
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan
| | - O Nagano
- Division of Gene Regulation, Institute for Advanced Medical Research, School of Medicine, Keio University, Minato, Japan
| | - T Beppu
- 1] Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan [2] Department of Multidisciplinary Treatment for Gastroenterological Cancer, Kumamoto University Hospital, Kumamoto 860-8556, Japan
| | - H Saya
- Division of Gene Regulation, Institute for Advanced Medical Research, School of Medicine, Keio University, Minato, Japan
| | - H Baba
- Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan
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Ouchi A, Yokoyama M, Takeuchi K, Nitta H, Ueda K, Nishimura N, Tsuyama N, Terui Y, Hatake K. GDP Chemotherapy for Relapsed/Refractory Lymphomas is Effective and Safe. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt460.113] [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
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Nishimura N, Terui Y, Ouchi A, Ueda K, Nitta H, Yokoyama M, Tsuyama N, Takeuchi K, Hatake K. Incidence of Deep Vein Thrombosis (DVE) in Myeloma Patients Treated with Lenalidomide/ Dexamethasone with Prophylaxis. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt459.96] [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
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Matsukawa R, Michicawa T, Ueda K, Nitta H, Yamamoto Y. Asian dust is a risk of the incidence of acute myocardial infarction in the west side of Japan. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.p2503] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Mimae T, Tsuta K, Kondo T, Nitta H, Grogan TM, Okada M, Asamura H, Tsuda H. Protein expression and gene copy number changes of receptor tyrosine kinase in thymomas and thymic carcinomas. Ann Oncol 2012; 23:3129-3137. [PMID: 22700994 DOI: 10.1093/annonc/mds147] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Insulin-like growth factor-1 receptor (IGF-1R), epidermal growth factor receptor (EGFR), human epidermal growth factor receptor-type 2 (HER2), and c-Met are members of the receptor tyrosine kinases (RTKs). The associations between the RTK status [protein expression and gene copy number (GCN)] and patient characteristics and between the RTK status and prognosis remain undetermined. MATERIALS AND METHODS The study included 140 patients who underwent surgery for thymic tumors. Protein expression was evaluated by immunohistochemistry (IHC) and GCN was evaluated by bright-field in situ hybridization (BISH). The correlations between the RTK status and clinicopathological findings were examined. RESULTS IGF-1R protein was frequently detected in thymic carcinoma (83.8%) and EGFR in thymic tumors (91.4%). Thirty-six and 39 tumors were BISH high for IGF-1R and EGFR, respectively: 28 and 25 exhibited high polysomy; 8 and 14 exhibited gene amplification. No tumor was positive for HER2 or c-Met by IHC and BISH. Multivariate analysis revealed that IGF-1R gene amplification (P = 0.027), thymic carcinoma histology, and higher tumor stage were significantly correlated with an adverse prognosis. CONCLUSIONS Thymic epithelial tumors frequently express IGF-1R and/or EGFR proteins. IGF-1R gene amplification is suggested to define an unfavorable subset for thymic epithelial tumors.
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Affiliation(s)
- T Mimae
- Divisions of Pathology and Clinical Laboratories, Japan; Divisions of Pharmaco-Proteomics, Japan; Department of Surgical Oncology, Research Institute for Radiation Biology and Medicine, Graduate School of Biomedical Sciences, Hiroshima University, Hiroshima, Japan
| | - K Tsuta
- Divisions of Pathology and Clinical Laboratories, Japan.
| | - T Kondo
- Divisions of Pharmaco-Proteomics, Japan
| | - H Nitta
- Department of Medical Innovation, Ventana Medical Systems, Inc., Tucson, USA
| | - T M Grogan
- Department of Medical Innovation, Ventana Medical Systems, Inc., Tucson, USA
| | - M Okada
- Department of Surgical Oncology, Research Institute for Radiation Biology and Medicine, Graduate School of Biomedical Sciences, Hiroshima University, Hiroshima, Japan
| | - H Asamura
- Divisions of Thoracic Surgery, National Cancer Center Hospital, Tokyo, Japan
| | - H Tsuda
- Divisions of Pathology and Clinical Laboratories, Japan
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Fukuzawa T, Mizuno M, Nakajima J, Nishizuka S, Kimura Y, Otsuka K, Nitta H, Kashiwaba M, Koeda K, Sasaki A, Wakabayashi G. Laparoscopy-assisted appendectomy through an umbilical port in children. Asian J Endosc Surg 2011; 4:11-5. [PMID: 22776168 DOI: 10.1111/j.1758-5910.2010.00069.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
INTRODUCTION We report surgical techniques for single-incision laparoscopy-assisted surgery (SILAS) in the treatment of pediatric acute appendicitis. METHODS We performed SILAS in 15 cases of acute appendicitis between January and September of 2009. SILAS is a surgical method that involves making the incision at the umbilicus, inserting a wound retractor XS, suspending the abdominal wall with a hook, and appendectomy with the same procedures as conventional appendectomy. RESULTS SILAS appendectomy was performed in all 15 cases with the exception of one case where one 3-mm port was added. Compared to open appendectomy, blood loss was significantly lower and postoperative hospitalization time was shorter, although there was no significant decrease in operative time, or postoperative fasting time. No postoperative complications, such as wound infection, intestinal obstruction, intra-abdominal abscess, or bleeding, were encountered. CONCLUSION SILAS was safely performed and is superior to open appendectomy with regard to cosmetic outcome.
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Affiliation(s)
- T Fukuzawa
- Department of Surgery, Iwate Medical University School of Medicine, Iwate, Japan
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Kurosumi M, Kobayashi Y, Takei H, Nitta H, Grogan T. 576 Utility of new brightfield dual-color in situ hybridization (BDISH) method for evaluating HER2 gene status of breast cancer patients. EJC Suppl 2010. [DOI: 10.1016/s1359-6349(10)70597-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Abstract
Benign esophageal tumor is a rare entity, with leiomyoma being the most common lesion. We present our experience with enucleation of esophageal leiomyomas using a minimally invasive approach. Between March 1998 and June 2008, seven patients with esophageal leiomyoma underwent right thoracosopic enucleation (n=4) or laparoscopic transhiatal enucleation (n=3). A Dor (n=2) or Toupet fundoplication (n=1) were added for laparoscopic procedure. The mean tumor size was 3.9 cm (range, 1.5-5.5 cm). Tumor locations were upper (n=2), middle (n=1), and lower (n=4) thirds of the esophagus. No major morbidities including postoperative leakage or mortalities occurred. At a mean follow-up period of 60.1 months (range, 14-260 months), no evidence of recurrences were observed. Thoracoscopic and laparoscopic transhiatal enucleation for esophageal leiomyomas is a safe and feasible procedure. The optimal approaches should be tailored based on the location and size of the tumor.
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Affiliation(s)
- T Obuchi
- Department of Surgery, Iwate Medical University School of Medicine, Uchimaru Morioka, Japan.
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Witte MH, Erickson RP, Khalil M, Dellinger M, Bernas M, Grogan T, Nitta H, Feng J, Duggan D, Witte CL. Lymphedema-distichiasis syndrome without FOXC2 mutation: evidence for chromosome 16 duplication upstream of FOXC2. Lymphology 2009; 42:152-160. [PMID: 20218083] [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: 05/28/2023]
Abstract
A patient with the classical phenotype of Lymphedema-Distichiasis syndrome (OMIM 153400) is described who showed no mutations in the sequence of FOXC2. Accordingly, a Gene Chip 250k array analysis was undertaken with dense SNP genotyping of the genomic region surrounding the FOXC2 locus on Chromosome 16 followed by copy number evaluation by real time PCR. The latter assay showed evidence of a duplicated region 5' of FOXC2 that could be causative for the patient's striking phenotype, which included both distichiasis and a hyperplastic refluxing lymphatic vascular and lymph node phenotype associated with pubertal onset lymphedema, scoliosis and strabismus.
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Affiliation(s)
- M H Witte
- Department of Surgery, University of Arizona College of Medicine, Tucson, AZ 85724-5200, USA.
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Suda T, Nagasawa T, Wara-aswapati N, Kobayashi H, Iwasaki K, Yashiro R, Hormdee D, Nitta H, Ishikawa I, Izumi Y. Regulatory roles of β-catenin and AP-1 on osteoprotegerin production in interleukin-1α-stimulated periodontal ligament cells. ACTA ACUST UNITED AC 2009; 24:384-9. [DOI: 10.1111/j.1399-302x.2009.00529.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Sasaki A, Nitta H, Otsuka K, Takahara T, Nishizuka S, Wakabayashi G. Ten-year experience of totally laparoscopic liver resection in a single institution. Br J Surg 2009; 96:274-9. [PMID: 19224518 DOI: 10.1002/bjs.6472] [Citation(s) in RCA: 143] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND Recent developments in liver surgery include the introduction of laparoscopic liver resection. The aim of the present study was to review a single institution's 10-year experience of totally laparoscopic liver resection (TLLR). METHODS Between May 1997 and April 2008, 82 patients underwent TLLR for hepatocellular carcinoma (HCC) (37 patients), liver metastases (39) and benign liver lesions (six). Operations included 69 laparoscopic wedge resections, 11 laparoscopic left lateral sectionectomies and two thoracoscopic wedge resections. Nine patients underwent simultaneous laparoscopic resection of colorectal primary cancer and synchronous liver metastases. RESULTS Median operating time was 177 (range 70-430) min and blood loss 64 (range 1-917) ml. Median tumour size and surgical margin were 25 (range 15-85) and 6 (range 0-40) mm respectively. One procedure was converted to a laparoscopically assisted hepatectomy. Three patients developed complications. Median postoperative stay was 9 (range 3-37) days. The overall 5-year survival rate after surgery for HCC and colorectal metastases was 53 and 64 per cent respectively. CONCLUSION TLLR can be performed safely for a variety of primary and secondary liver tumours, and seems to offer at least short-term benefits in selected patients.
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Affiliation(s)
- A Sasaki
- Department of Surgery, Iwate Medical University School of Medicine, Uchimaru Morioka, Iwate, Japan.
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29
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Katagiri S, Nitta H, Nagasawa T, Uchimura I, Izumiyama H, Inagaki K, Kikuchi T, Noguchi T, Kanazawa M, Matsuo A, Chiba H, Nakamura N, Kanamura N, Inoue S, Ishikawa I, Izumi Y. Multi-center intervention study on glycohemoglobin (HbA1c) and serum, high-sensitivity CRP (hs-CRP) after local anti-infectious periodontal treatment in type 2 diabetic patients with periodontal disease. Diabetes Res Clin Pract 2009; 83:308-15. [PMID: 19168253 DOI: 10.1016/j.diabres.2008.10.016] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2008] [Revised: 10/14/2008] [Accepted: 10/21/2008] [Indexed: 01/03/2023]
Abstract
The purpose of this study was to examine whether periodontal treatment incorporating topical antibiotic therapy affects on levels of glycohemoglobin (HbA1c) and serum high-sensitivity C-reactive protein (hs-CRP) in type 2 diabetic patients with periodontal disease, and to explore the relationship between CRP and glycemic control. The whole intervention group (n=32), which underwent anti-infectious periodontal treatment, showed only transient reduction in HbA1c levels without any change in hs-CRP, while the control group (n=17) did not show any changes in HbA1c or hs-CRP. Multiple regression analysis of all subjects revealed that BMI and change in hs-CRP correlated significantly with the reduction of HbA1c at 6 months after the periodontal treatment. Based on the results of multiple regression analysis, the intervention group was subdivided into two groups: those in which hs-CRP levels decreased (CRP-D group), and those in which hs-CRP levels unchanged or increased (CRP-N group) (n=16, respectively), and re-analysis was conducted based upon these subgroups. In the CRP-D subgroup, HbA1c was significantly reduced at the end of the study, but it did not decrease in the CRP-N subgroup. The decrease of HbA1c in the CRP-D subgroup following periodontal treatment was significantly greater than that in the CRP-N subgroup. BMI of each group remained unchanged in this study at the end of the study. Thus, the results suggested that periodontal treatment with topical antibiotics improves HbA1c through reduction of CRP, which may relate to amelioration of insulin resistance, in type 2 diabetic patients with periodontal disease.
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Affiliation(s)
- S Katagiri
- Periodontology, Department of Hard Tissue Engineering, Tokyo Medical and Dental University Graduate School, Tokyo, Japan
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Tubbs RR, Nitta H, Gaire F, Dietel M, Loftus M, Pettay J, Grogan TM. Concomitant delineation of HER2 gene amplification and protein expression status using a two-color bright field immunogenotypic assay (SISHPro HER2). J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.22006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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31
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Nitta H, Hauss-Wegrzyniak B, Lehrkamp M, Gaire F, Kurosumi M, Dietel M, Loftus M, Pettay J, Tubbs RR, Grogan TM. Development of automated brightfield HER2 and chromosome 17 centromere (CEN17) double in situ hybridization application for breast carcinomas and its performance comparison to manual HER2 fluorescence in situ hybridization (FISH). J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.11080] [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: 11/20/2022] Open
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32
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Nitta H, Kinoyama M, Watanabe A, Shirao K, Kihara H, Arai M. Effects of nutritional supplementation with antioxidant vitamins and minerals and fish oil on antioxidant status and psychosocial stress in smokers: an open trial. Clin Exp Med 2008; 7:179-83. [PMID: 18188532 DOI: 10.1007/s10238-007-0144-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2007] [Accepted: 09/18/2007] [Indexed: 11/27/2022]
Abstract
Nutritional supplement foods containing antioxidant vitamins and minerals and fish oil (mainly docosahexaenoic acid, DHA, C22:6n-3), referred to as capsules, were administered to seven smokers every day for 34 days. Concentrations of antioxidant vitamins and minerals in serum, activity of superoxide dismutase in plasma and the concentration of 8-isoprostane (8-epi-prostaglandin F(2) alpha) in the urine showed an increase or a tendency to increase after the end of administration. The frequency of subjects showing poor state of psychological health evidenced by a total score of 8 points or more on the General Health Questionnaire (30-item edition) scale was 42.9%, although there was a significant decrease to 14.3% upon completion of administration of the capsules. These biochemical and psychological changes were mostly returned to the basal level one month after the end of administration of the capsules. The results suggest that administration of antioxidant vitamins and minerals and fish oil to smokers resulted in an increase in antioxidant capacity. Effectiveness in alleviating psychosocial stress likely to be attributable to DHA was also observed.
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Affiliation(s)
- H Nitta
- Department of Clinical Nutrition, Kawasaki University of Medical Welfare, 288 Matsushima, Kurashiki, Okayama, 701-0193, Japan
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33
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Kiji M, Nagasawa T, Hormdee D, Yashiro R, Kobayashi H, Noguchi K, Nitta H, Izumi Y, Ishikawa I. Internal prostaglandin synthesis augments osteoprotegerin production in human gingival fibroblasts stimulated by lipopolysaccharide. Clin Exp Immunol 2007; 149:327-34. [PMID: 17550374 PMCID: PMC1941953 DOI: 10.1111/j.1365-2249.2007.03414.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [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] [Accepted: 04/13/2007] [Indexed: 11/30/2022] Open
Abstract
Periodontitis is an inflammatory bone disease caused by Gram-negative anaerobic bacteria. Osteoclast differentiation is regulated by the balance between receptor activator of nuclear factor kappa B ligand (RANKL) and osteoprotegerin (OPG). The purpose of this study was to examine the mechanism of OPG production in human gingival fibroblasts (HGF) stimulated by lipopolysaccharide (LPS) from periodontopathic bacteria. The expressions of Toll-like receptor 2 (TLR-2) and TLR-4 in HGF were examined using flow-cytometry. HGF were stimulated with whole cell extracts or LPS from Actinobacillus actinomycetemcomitans and Porphyromonas gingivalis with or without polymyxin B, a LPS inhibitor. In addition, HGF were stimulated with LPS, prostaglandin E(2) (PGE(2)), various agonists of PGE receptors (EP1, EP2, EP3 and EP4 agonists) with or without indomethacin (IND), a prostaglandin synthesis inhibitor. OPG and PGE(2) production was measured using an enzyme-linked immunosorbent assay (ELISA). HGF expressed both TLR-2 and TLR-4. Both A. actinomycetemcomitans and P. gingivalis LPS augmented OPG expression in HGF. Whole cell extracts from A. actinomycetemcomitans and P. gingivalis augmented OPG production by HGF; the augmentation was suppressed by polymyxin B. IND suppressed OPG production in LPS-stimulated HGF. PGE(2) stimulated HGF to produce OPG. EP1 and EP2 agonists, but not EP3 and EP4 agonists, increased OPG production by HGF. These results suggest that LPS-induced OPG production by HGF is regulated via EP1 and/or EP2 receptors by endogenously generated PGE(2).
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Affiliation(s)
- M Kiji
- Periodontology, Department of Hard Tissue Engineering, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
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34
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Nitta H, Kinoyama M, Teramoto F, Watanabe A, Koga H, Haruma K, Akagi R, Ueda H. Exhaled carbon monoxide concentration is not elevated in patients with inflammatory bowel disease. Clin Exp Med 2007; 7:77-81. [PMID: 17609880 DOI: 10.1007/s10238-007-0129-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2006] [Accepted: 03/21/2007] [Indexed: 01/13/2023]
Abstract
The present study was initiated to examine whether the concentration of CO in the breath is elevated in patients with inflammatory bowel disease (IBD). Twenty-three clinically stable patients with IBD in the outpatient clinic (11 with Crohn's disease, 12 with ulcerative colitis), who are non-smokers and non-passive smokers, were selected and the concentration of CO in their breath was measured using a breath gas analyser (TRI lyser mBA-3000). The concentration of CO in the breath of 23 patients with IBD was 2.5+/-0.9 (1.1-4.3) ppm. This concentration comes within the range of standard values in our previous reports (2.5+/-2.2 ppm). Any significant difference was not observed between 2.4+/-0.9 (1.5-4.3) ppm for the 11 Crohn's disease patients and the 2.6+/-1.0 (1.1-3.9) ppm for the 12 ulcerative colitis patients. The results suggest that clinically stable patients with IBD do not show high values for concentration of CO in the breath.
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Affiliation(s)
- H Nitta
- Department of Clinical Nutrition, Kawasaki University of Medical Welfare, 288 Matsushima, Kurashiki, Okayama 701-0193, Japan
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35
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Yamazaki S, Nitta H, Ono M, Green J, Fukuhara S. Intracerebral haemorrhage associated with hourly concentration of ambient particulate matter: case-crossover analysis. Occup Environ Med 2006; 64:17-24. [PMID: 16847037 PMCID: PMC2092584 DOI: 10.1136/oem.2005.021097] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [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: 11/04/2022]
Abstract
AIMS To examine the association of hourly time lagged concentration of ambient particulate matter and death due to stroke. METHODS Mortality data for five years (January 1990 to December 1994) were obtained from the Ministry of Health, Labour, and Welfare of Japan. Data were used only if the deceased was 65 years old or older at the time of death, if death was attributed to intracerebral haemorrhage or ischaemic stroke, and if the deceased lived in one of 13 major urban areas. Hourly mean concentrations of PM7, NO2, and photochemical oxidants were measured at monitoring stations in the 13 areas. Time stratified case-crossover analysis was used to examine the data for evidence of triggering stroke mortality. RESULTS The 1-hour mean concentration of PM7 measured about 2 hours before death was associated with the risk of death due to intracerebral haemorrhage from April to September (odds ratio = 2.40, 95% CI 1.48 to 3.89, for exposure to PM7 of more than 200 microg/m3 (threshold)). The higher risk was independent of the 24-hour mean concentration of PM7. PM7 was not associated with death due to ischaemic stroke. CONCLUSIONS Transiently high concentrations of PM7 are associated with death due to intracerebral haemorrhage. Air quality standards or guidelines for particulate matter should be based not only on 24-hour mean concentrations, but also on hourly data.
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Affiliation(s)
- S Yamazaki
- Department of Epidemiology and Healthcare Research, Graduate School of Public Health, Kyoto University, Kyoto, Japan.
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36
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Yashiro R, Nagasawa T, Kiji M, Hormdee D, Kobayashi H, Koshy G, Nitta H, Ishikawa I. Transforming growth factor-beta stimulates Interleukin-11 production by human periodontal ligament and gingival fibroblasts. J Clin Periodontol 2006; 33:165-71. [PMID: 16489941 DOI: 10.1111/j.1600-051x.2006.00898.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Transforming growth factor (TGF)-beta is a potent multifunctional polypeptide, abundant in the bone matrix. Interleukin (IL)-11 is a pleiotropic cytokine with effects on multiple cell types. The present study was performed to evaluate the regulatory effects of TGF-beta on IL-11 production by human periodontal ligament cells (PDL) and human gingival fibroblasts (HGF). MATERIAL AND METHODS The expression of TGF-beta receptor in PDL and HGF were observed using flow cytometry. PDL and HGF were stimulated with TGF-beta with or without protein kinase C (PKC) inhibitors and activator. IL-11, bone morphogenetic protein-2 (BMP-2) and TGF-beta mRNA expression was quantified by real-time polymerase chain reaction (PCR). IL-11 production was measured using enzyme-linked immunosorbent assay. RESULTS PDL and HGF expressed both TGF-beta receptor I and TGF-beta receptor II on the cell surfaces. IL-11 mRNA expression and IL-11 production were augmented by TGF-beta in both PDL and HGF, with higher values in PDL. PKC inhibitors partially suppressed TGF-beta-induced IL-11 production in PDL and HGF, whereas activator enhanced it. TGF-beta mRNA and BMP-2 mRNA expression were up-regulated by TGF-beta in PDL. CONCLUSION These results suggest that PDL produce IL-11 in response to TGF-beta.
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Affiliation(s)
- R Yashiro
- Periodontology, Department of Hard Tissue Engineering, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
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37
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Hormdee D, Nagasawa T, Kiji M, Yashiro R, Kobayashi H, Koshy G, Noguchi K, Nitta H, Ishikawa I. Protein kinase-A-dependent osteoprotegerin production on interleukin-1 stimulation in human gingival fibroblasts is distinct from periodontal ligament fibroblasts. Clin Exp Immunol 2006; 142:490-7. [PMID: 16297161 PMCID: PMC1809540 DOI: 10.1111/j.1365-2249.2005.02937.x] [Citation(s) in RCA: 12] [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: 01/01/2023] Open
Abstract
Periodontitis, a chronic inflammatory disease, is characterized by increased expression of interleukin (IL)-1 and other inflammatory mediators resulting in extensive osteoclast formation and bone loss. Expression of receptor activator of nuclear factor kappa B ligand (RANKL) and its decoy receptor, osteoprotegerin (OPG), by osteoblasts is important to regulate osteoclast differentiation. The aim of the present study was to investigate the regulatory effects of IL-1 on RANKL and OPG production by mesenchymal fibroblasts in periodontal tissue. Human gingival fibroblasts (HGF) and periodontal ligament fibroblasts (PDL) were stimulated with IL-1alpha with or without protein synthesis inhibitor cycloheximide (CHX), protein kinase A (PKA) inhibitors, protein kinase C (PKC) inhibitors and prostaglandin E(2) (PGE(2)) inhibitor. In some experiments, the cultured cells were directly stimulated with either PKA or PKC activators. In HGF, IL-1alpha-stimulated OPG mRNA expression was high and could be reduced by CHX. PKA inhibitor completely abrogated IL-1alpha-induced OPG mRNA expression and OPG production. Endogenous PGE(2) further enhanced IL-1alpha-induced OPG production in HGF. In PDL, RANKL mRNA expression was greatly augmented by IL-1alpha. IL-1alpha induced OPG mRNA expression and protein production. PKC inhibitor partially reduced IL-1alpha-induced OPG production and PKC activator enhanced OPG production in PDL. The IL-1alpha-stimulated OPG mRNA expression in HGF was greater than PDL. These results provide new evidence for the possible osteoclastogenesis-inhibitory function of HGF through PKA activity pathway. PDL utilized PKC for OPG production. Thus, we emphasize that HGF and PDL have different characteristics of host defence mechanism against inflammatory process.
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Affiliation(s)
- D Hormdee
- Periodontology, Department of Hard Tissue Engineering, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
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38
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Nitta H, Khokonov MK, Nagata Y, Onuki S. Electron-positron pair production by photons in nonuniform strong fields. Phys Rev Lett 2004; 93:180407. [PMID: 15525140 DOI: 10.1103/physrevlett.93.180407] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2004] [Indexed: 05/24/2023]
Abstract
A probability of electron-positron pair production by photons in strong nonuniform fields is derived by applying a model trajectory method in the frame of a semiclassical approach. In addition to the well known invariant field parameter chi, a new invariant parameter nu is introduced to characterize the nonuniformity of the field. For nu>>1, the obtained expression is reduced to the uniform-field approximation while it approaches the Bethe-Heitler formula for nu<<1. The pair production is predicted for relatively weak external fields where the uniform-field approximation gives no effect. The theory agrees well with the experimental results of crystal-assisted pair production.
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Affiliation(s)
- H Nitta
- Department of Physics, Tokyo Gakugei University, Koganei, Tokyo 184-8501, Japan
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Salimullah M, Rizwan AM, Nambu M, Nitta H, Shukla PK. Dust-lower-hybrid drift instabilities with dust charge fluctuations in an inhomogeneous dusty magnetoplasma. Phys Rev E 2004; 70:026404. [PMID: 15447598 DOI: 10.1103/physreve.70.026404] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2004] [Indexed: 11/07/2022]
Abstract
Effects of a uniform magnetic field, the plasma inhomogeneity, and dust charge fluctuations on low-frequency dust-lower-hybrid drift waves have been investigated. Charging currents of electrons and ions to a spherical dust grain in a nonuniform magnetized dusty plasma have been calculated to study the charge fluctuation induced damping or growth of low-frequency drift waves. It is found that for strongly magnetized electrons and ions, the charge fluctuation damping is reduced significantly from that of an unmagnetized plasma. For sufficiently hot electrons, the drift wave exhibits instability in the absence of dust charge fluctuation damping.
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Affiliation(s)
- M Salimullah
- Department of Physics, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh.
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Ishihara N, Yamada K, Yamada Y, Miura K, Kato J, Kuwabara N, Hara Y, Kobayashi Y, Hoshino K, Nomura Y, Mimaki M, Ohya K, Matsushima M, Nitta H, Tanaka K, Segawa M, Ohki T, Ezoe T, Kumagai T, Onuma A, Kuroda T, Yoneda M, Yamanaka T, Saeki M, Segawa M, Saji T, Nagaya M, Wakamatsu N. Clinical and molecular analysis of Mowat-Wilson syndrome associated with ZFHX1B mutations and deletions at 2q22-q24.1. J Med Genet 2004; 41:387-93. [PMID: 15121779 PMCID: PMC1735777 DOI: 10.1136/jmg.2003.016154] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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41
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Kanematsu S, Arakawa M, Oikawa Y, Onoue M, Osaki H, Nakamura H, Ikeda K, Kuga-Uetake Y, Nitta H, Sasaki A, Suzaki K, Yoshida K, Matsumoto N. A Reovirus Causes Hypovirulence of Rosellinia necatrix. Phytopathology 2004; 94:561-8. [PMID: 18943480 DOI: 10.1094/phyto.2004.94.6.561] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
ABSTRACT White root rot, caused by Rosellinia necatrix, is a serious soilborne disease of fruit trees and other woody plants. R. necatrix isolate W370 contains 12 segments of double-stranded RNA (dsRNA) that is believed to represent a possible member of the family Reoviridae. W370 was weakly virulent and its hyphal-tip strains became dsRNA free and strongly virulent. The 12 segments of W370dsRNA were transmitted to hygromycin B-resistant strain RT37-1, derived from a dsRNA-free strain of W370 in all or none fashion through hyphal contact with W370. The W370dsRNA-transmitted strains were less virulent than their parent strain RT37-1 on apple seedlings, with mortality ranging between 0 to 16.7% in apple seedlings that were inoculated with the W370dsRNA-containing strains and 50 to 100% for seedlings inoculated with the dsRNA-free strains. Some W370dsRNA-containing strains killed greater than 16.7% of seedlings, but these were found to have lost the dsRNA in planta. These results indicate that W370dsRNA is a hypovirulence factor in R. necatrix. In addition, a strain lost one segment (S8) of W370dsRNA during subculture, and the S8-deficient mutant strain also exhibits hypovirulence in R. necatrix.
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Nitta H, Muroki C, Nambu M. Stopping power of charged particles due to ion wave excitations. Phys Rev E Stat Nonlin Soft Matter Phys 2002; 66:027401. [PMID: 12241328 DOI: 10.1103/physreve.66.027401] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2002] [Indexed: 11/07/2022]
Abstract
Stopping power due to ion wave excitations is derived for a charged particle moving in a two-component plasma. Unlike previous theories based on ion-acoustic-wave approximation (IAWA), the excitation of short-wavelength ion waves is taken into account. The obtained stopping power has a magnitude larger than that of IAWA. Stopping power at subsonic velocities, where stopping power in IAWA disappears, is even larger than that of supersonic velocities.
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Affiliation(s)
- H Nitta
- Department of Physics, Tokyo Gakugei University, Koganei, Tokyo 184-8501, Japan
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Nitta H, Miyazaki T. Spontaneous emission of bound photons from relativistic free electrons. Phys Rev E Stat Nonlin Soft Matter Phys 2002; 66:035501. [PMID: 12366176 DOI: 10.1103/physreve.66.035501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2002] [Indexed: 05/23/2023]
Abstract
If the states of photons are bound, another type of spontaneous emission becomes possible for a relativistic electron due to the symmetry breaking in space. We obtain the radiation probability for a relativistic electron passing through a box-shaped cavity. The radiation spectrum is discrete in which line positions are determined by the boundary condition of the cavity.
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Affiliation(s)
- H Nitta
- Department of Physics, Tokyo Gakugei University, Koganei, Japan
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44
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Khokonov MK, Nitta H. Standard radiation spectrum of relativistic electrons: beyond the synchrotron approximation. Phys Rev Lett 2002; 89:094801. [PMID: 12190405 DOI: 10.1103/physrevlett.89.094801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2001] [Indexed: 05/23/2023]
Abstract
Radiation emitted by an electron in arbitrary, extreme relativistic motion, has been described for the first time in terms of a standard spectrum of nonsynchrotron type. Ultimately, such a nonsynchrotron spectrum is dependent not only on instantaneous trajectory curvature, but also upon its first two time derivatives and helicity, to provide a basic correction to the synchrotron approximation (SA). A strong deviation from SA has been predicted for above GeV electrons in oriented crystals.
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Affiliation(s)
- M Kh Khokonov
- Department of Physics, Kabardino-Balkarian State University, 360004 Nalchik, Russian Federation
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45
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Ishido M, Nitta H, Kabuto M. Magnetic fields (MF) of 50 Hz at 1.2 microT as well as 100 microT cause uncoupling of inhibitory pathways of adenylyl cyclase mediated by melatonin 1a receptor in MF-sensitive MCF-7 cells. Carcinogenesis 2001; 22:1043-8. [PMID: 11408347 DOI: 10.1093/carcin/22.7.1043] [Citation(s) in RCA: 41] [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: 12/15/2022] Open
Abstract
Magnetic fields (MF) of 60 Hz at 1.2 microT were previously shown to inhibit the antiproliferative effect of melatonin on MCF-7 cells (Liburdy,R.P., 1993, J. Pimeal Res. 14, 89-97). In addition, three laboratories (Blackman,C.F. and Benane,S.G., 1998; Luben,R.A. and Morgan,A.P., 1998; Morris,J.E., Chrisler,W.B., Miller,D.L., Sasser,L.B. and Anderson,L.E., 1998; 20th Annual Meeting of the Bioelectromagnetics Society, At. Pete Beach, FL) independently reported results consistent with this finding. In this study, we investigated the molecular basis of the biological effects of MF using MCF-7 cells. Only 1a melatonin receptors were identified by the [125I]melatonin binding assay and RT-PCR analysis. Moreover, preceding exposures to MF of 100 microT for 3, 5 and 7 days blocked the melatonin-induced inhibition of cAMP accumulation in a time-dependent manner, while none of the melatonin receptor functions or GTPase and adenylyl cyclase activities were affected. Estrogen-evoked cell proliferation was not altered by MF either. Exposure to 1.2 microT MF exerted the same effects on the melatonin-signaling pathway as that to 100 microT. Thus, this is the first study to provide evidence that MF may cause uncoupling of signal transduction from melatonin receptors to adenylyl cyclase.
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Affiliation(s)
- M Ishido
- Regional Environment Division, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-0053, Japan
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Sasaki R, Takahashi M, Funato O, Nitta H, Murakami M, Kawamura H, Suto T, Kanno S, Saito K. Prognostic significance of lymph node involvement in middle and distal bile duct cancer. Surgery 2001; 129:677-83. [PMID: 11391365 DOI: 10.1067/msy.2001.114555] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND Although lymph node involvement is considered an important prognostic factor, a detailed analysis has not been conducted in middle (Bm) and distal (Bi) bile duct cancer. METHODS The histopathology of resections taken from 59 patients with Bm and Bi disease (Bm, 33 patients; Bi, 26 patients) was examined. The prevalence of lymph node involvement and its relationship to recurrence and prognosis were investigated. Survival rates were investigated according to the number of metastatic lymph nodes found, the TNM nodal stages, and the nodal stage classifications of The General Rules of the Japanese Society of Biliary Surgery. RESULTS The frequency of nodal involvement in Bm and Bi was 45.5% and 30.8%, respectively. A significant correlation existed between a patient's prognosis and his TNM nodal stage, Japanese Society of Biliary Surgery nodal stage, and the number of metastatic lymph nodes found (P <.0001, respectively). Among 8 sites of postoperative recurrence, metastasis occurred most frequently in the liver (16/23). Patients with nodal involvement had a significantly higher rate of liver metastasis (10/23) than those without it (6/36) (P =.024). CONCLUSIONS The number of metastatic lymph nodes found in patients with Bm or Bi cancer, and the nodal stage of their nodes, are significant prognostic indicators. Patients with nodal involvement are at high risk for liver metastasis in Bm and Bi disease.
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Affiliation(s)
- R Sasaki
- Department of Surgery I, Iwate Medical University School of Medicine, 19-1 Uchimaru, Morioka 020-8505, Japan
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Noguchi K, Shitashige M, Endo H, Kondo H, Yotsumoto Y, Izumi Y, Nitta H, Ishikawa I. Involvement of cyclooxygenase-2 in serum-induced prostaglandin production by human oral gingival epithelial cells. J Periodontal Res 2001; 36:124-30. [PMID: 11327079 DOI: 10.1034/j.1600-0765.2001.360209.x] [Citation(s) in RCA: 11] [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] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The purpose of the present study was to investigate the involvement of cyclooxygenase-1 (COX-1) and cyclooxygenase-2 (COX-2) in prostaglandin (PG) production by human oral gingival epithelial (OGE) cells stimulated with proinflammatory cytokines including interleukin(IL)-1alpha, IL-1alpha and tumor necrosis factor alpha (TNFalpha), and serum. Fetal bovine serum (FBS)-stimulated OGE cells produced significant levels of PGE2, whereas IL-1alpha, IL-1beta and TNFalpha could not induce significant PGE2 production. FBS induced PGE2 production in a dose- and time-dependent manner. NS-398, a selective COX-2 inhibitor, inhibited PGE2 production by FBS-stimulated cells as completely as indomethacin, a non-selective COX-1/COX-2 inhibitor. Expression of COX-2 protein in FBS-stimulated cells was increased, compared with that in unstimulated cells, whereas COX-1 protein expression was similar both in unstimulated and in FBS-stimulated cells. COX-2 mRNA was detected in FBS-stimulated cells, but not in unstimulated cells. We suggest that COX-2 is responsible for PG production by human OGE cells stimulated with serum and that OGE cells may be involved in PG production in periodontal lesions. Selective COX-2 inhibitors, which have the advantage of reduced gastric toxicity, may provide a useful approach to treatment of periodontal disease.
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Affiliation(s)
- K Noguchi
- Department of Periodontology, Faculty of Dentistry, Tokyo Medical & Dental University, Japan.
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Abstract
Drug resistance is a major clinical problem in the chemotherapy of human gliomas. The multidrug resistance-associated protein (MRP), a membrane transporter related to non-P-glycoprotein multidrug resistance, is overexpressed in some drug-selected cancer cell lines. To investigate whether MRP is involved in the intrinsic drug resistance of human gliomas, surgical specimens of 20 gliomas (11 glioblastomas, 6 anaplastic astrocytomas, and 3 astrocytomas), 3 normal brain specimens, and 4 glioma cell lines (U87MG, U251MG, U373MG, and T98G) were analyzed. The expression of MRP was studied by RT-PCR and immunohistochemistry in the surgical specimens. The MRP expression levels in the cell lines were assessed by the quantitative RT-PCR and Western blot analyses. Sensitivity to adriamycin (ADM), etoposide (VP-16), cisplatin (CDDP), and 1-(4-amino-2-methyl-5-pyrimidinyl) methyl-3-(2-chloroethyl)-3-nitrosourea (ACNU), were determined by MTT assay, and antisense treatment was evaluated in the cell lines. The expression of MRP was detected in 9 of 11 glioblastomas and 3 of 6 anaplastic astrocytomas. The quantitative analyses of the cell lines revealed that the MRP mRNA and protein levels were increased 4.5-fold in the T98G cells as compared to U87MG. T98G cells showed the highest resistance to all drugs. Western blot analysis revealed that treatment with the antisense oligonucleotide reduced the level of MRP expression to 25% of the sense oligonucleotide treatment in T98G cells. The sensitivity to ADM, VP-16 and CDDP was significantly increased in the antisense-treated cells as compared with the sense-treated cells. These results suggest that the MRP expression may be related to the intrinsic multidrug resistance in human gliomas.
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Affiliation(s)
- M Mohri
- Department of Neurosurgery, Kanazawa University School of Medicine, Japan
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Abstract
OBJECTIVES Papillon-Lefèvre syndrome (PLS) is a rare disease associated with prepubertal periodontitis. Our previous studies demonstrated that three unrelated patients with PLS showed the similar antigen-specific immune responses to Actinobacillus actinomycetemcomitans. The initiation of antigen-specific immune responses was involved with human leukocyte antigens (HLA) on antigen-presenting cells. The aim of this study was to examine HLA haplotypes in the three patients with PLS. SUBJECTS AND METHODS The three PLS patients, their mothers and the father of one patient participated in this study. HLA class I and class II antigens were determined serologically and DNA typing for DRB1 and DQB1 was performed using the restriction fragment length polymorphism-polymerase chain reaction method. RESULTS The distribution of serologic HLA haplotypes, in two of three patients, was found to be quite similar. The DNA typing revealed that DRB1*0406, DRB1*08032, DQB1*0302, DQB1*06011 genotypes were shared in the two patients. The probability of sharing these four DNA types in unrelated individuals was nearly 1:40,000 in the Japanese population. CONCLUSION Our results suggest that HLA antigen may be included as a possible host factor in the pathogenesis of PLS and that a genetically controlled immune response may account for an increased susceptibility to periodontal infection.
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Affiliation(s)
- H Nitta
- Department of Periodontology, Faculty of Dentistry, Tokyo Medical and Dental University, Tokyo, Japan.
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Kageyama T, Kabuto M, Nitta H, Kurokawa Y, Taira K, Suzuki S, Takemoto T. Prevalences of periodic limb movement-like and restless legs-like symptoms among Japanese adults. Psychiatry Clin Neurosci 2000; 54:296-8. [PMID: 11186084 DOI: 10.1046/j.1440-1819.2000.00685.x] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Prevalences of periodic limb movement-like and restless legs-like symptoms among Japanese adults were investigated. The latter symptom was significantly associated with insomnia.
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Affiliation(s)
- T Kageyama
- Department of Mental Health and Psychiatric Nursing, Oita University of Nursing and Health Sciences, Notsuharu, Japan.
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