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Efthymakis K, Neri M. The role of Zinc L-Carnosine in the prevention and treatment of gastrointestinal mucosal disease in humans: a review. Clin Res Hepatol Gastroenterol 2022; 46:101954. [PMID: 35659631 DOI: 10.1016/j.clinre.2022.101954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 04/05/2022] [Accepted: 05/11/2022] [Indexed: 02/04/2023]
Abstract
Zinc L-carnosine is a pharmaceutical compound with direct mucosal cytoprotective and anti-inflammatory action through its antioxidative effects, cytokine modulation and membrane-stabilizing properties. Chemically, it is not an anti-secretory, antacid or raft-forming agent; its properties are mainly mediated by its higher affinity for damaged mucosa that permits the release of zinc locally by ligand exchange. Beneficial effects on various types of mucosal damage have been described in vitro and in vivo, in both animals and humans. It has been shown to promote repair of mucosal injury in human studies and has been widely used for the treatment of peptic ulcers, chemoradiotherapy-induced oral mucositis and esophagitis. More recently, the therapeutic applications of Zinc L-carnosine have been extended to the prevention and cure of various types of intestinal damage, including ulcerative colitis, iatrogenic ulcers after operative endoscopy, hemorrhoidal disease and impaired intestinal permeability. This review concentrates mainly on the current and future applications of zinc L-carnosine in gastrointestinal disease, and may be of use to gastroenterologists and endoscopists. It describes the therapeutic principles and benefits of this interesting molecule and discusses the potential future fields of interest for clinical use in humans.
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Affiliation(s)
- Konstantinos Efthymakis
- Digestive Endoscopy and Gastroenterology Unit, SS Annunziata Hospital, ASL2 Abruzzo, Chieti, Italy
| | - Matteo Neri
- Digestive Endoscopy and Gastroenterology Unit, SS Annunziata Hospital, ASL2 Abruzzo, Chieti, Italy; Department of Medicine and Ageing Sciences and Center for Advanced Studies and Technology (C.A.S.T.), University "G. D'Annunzio", Chieti-Pescara, Chieti, Italy.
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Li M, Sun Z, Zhang H, Liu Z. Recent advances on polaprezinc for medical use (Review). Exp Ther Med 2021; 22:1445. [PMID: 34721687 DOI: 10.3892/etm.2021.10880] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 07/06/2021] [Indexed: 12/13/2022] Open
Abstract
The present study described the chemical and biological properties of zinc complex of L-carnosine (L-CAZ; generic name, polaprezinc; chemical name, catena-(S)-[µ-[N(α)-(3-aminopropionyl) histidinato (2-) N1, N2, O: N(τ)]-zinc], molecular formula, C9H14N4O3Zn; molecular weight, 291.6404; CAS registry number, 107667-60-7). Characterized as a white or yellowish white crystalline powder, this drug is insoluble in glacial acetic acid and almost insoluble in water, methanol, ethanol and ether. It is soluble in dilute hydrochloric acid, dilute nitric acid and sodium hydroxide solution, and its melting point is 260-270˚C. Polaprezinc is an anti-ulcer drug that was jointly studied and developed by Hamari Chemicals Co., Ltd. and Zeria Pharmaceutical Co., Ltd., and was first approved in Japan in 1994. This review article summarizes the research advances of polaprezinc, including the patents, preparations, synthetic routes, pharmacokinetics, pharmacological effects and application in clinical research.
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Affiliation(s)
- Mingru Li
- Jilin Broadwell Pharmaceutical Co., Ltd., Liaoyuan, Jilin 136200, P.R. China
| | - Zhen Sun
- Department of Gastroenterology, Jilin People's Hospital, Jilin City, Jilin 132000, P.R. China
| | - Hong Zhang
- Jilin Broadwell Pharmaceutical Co., Ltd., Liaoyuan, Jilin 136200, P.R. China
| | - Zhaoyang Liu
- National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, P.R. China
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Doi H, Kuribayashi K, Kijima T. Utility of polaprezinc in reducing toxicities during radiotherapy: a literature review. Future Oncol 2018; 14:1977-1988. [DOI: 10.2217/fon-2018-0021] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Chemoradiotherapy is important for treating malignancies. However, radiation-induced toxicities develop as chemoradiotherapy-related complications. Various agents reduce or prevent toxicities, but there are no standard treatments. Polaprezinc (PZ), a chelating compound used for gastric ulcers, has antioxidant and free radical scavenging effects. Although few studies have evaluated PZ and radiation-induced normal tissue damage, several clinical studies have shown the efficacy of PZ for oral mucositis, esophagitis, proctitis and taste alterations during and after radiotherapy. Moreover, preclinical data support the clinical data, indicating good potential of testing PZ in future trials. However, as there are only few well-documented review articles on PZ use in cancer treatment, we conducted this literature review. PZ reduced several radiation-induced toxicities and improved the quality of life.
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Affiliation(s)
- Hiroshi Doi
- Department of Radiation Oncology, Meiwa Cancer Clinic, Nishinomiya, Hyogo, Japan
- Department of Radiology, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
- Department of Radiation Oncology, Kindai University Faculty of Medicine, Osaka-Sayama, Osaka, Japan
| | - Kozo Kuribayashi
- Division of Respiratory Medicine, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Takashi Kijima
- Division of Respiratory Medicine, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
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Yavuz E, Ercan G, Karagulle OO, Bayrak BY, Biricik A, Ercetin C, Gokcek B, Yigitbas H, Kusaslan R, Celik A, Gulcicek OB. Evaluation of prophylactic and therapeutic effects of sildenafil on acute radiation proctitis in rats. Acta Cir Bras 2018; 33:362-374. [DOI: 10.1590/s0102-865020180040000008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Accepted: 05/20/2018] [Indexed: 01/27/2023] Open
Affiliation(s)
- Erkan Yavuz
- University of Health Science Bagcilar Training and Research Hospital, Turkey
| | - Gulcin Ercan
- University of Health Science Bagcilar Training and Research Hospital, Turkey
| | | | | | - Aytac Biricik
- University of Health Science Bagcilar Training and Research Hospital, Turkey
| | - Candas Ercetin
- University of Health Science Bagcilar Training and Research Hospital, Turkey
| | - Berk Gokcek
- University of Health Science Okmeydanı Training and Research Hospital, Turkey
| | - Hakan Yigitbas
- University of Health Science Bagcilar Training and Research Hospital, Turkey
| | - Ramazan Kusaslan
- University of Health Science Bagcilar Training and Research Hospital, Turkey
| | - Atilla Celik
- University of Health Science Bagcilar Training and Research Hospital, Turkey
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Yavuz E, Karagulle OO, Ercan G, Celik A, Yigitbas H, Bayrak BY, Tartar R, Kusaslan R, Altinel Y, Gulcicek OB. Evaluation of prophylactic and therapeutic effects of ruscogenin on acute radiation proctitis: an experimental rat model. Ann Surg Treat Res 2018; 94:174-182. [PMID: 29629351 PMCID: PMC5880974 DOI: 10.4174/astr.2018.94.4.174] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 08/22/2017] [Accepted: 08/26/2017] [Indexed: 01/27/2023] Open
Abstract
Purpose Radiation proctitis (RP) is inflammation and damage to the rectum, manifested secondary to ionizing radiation utilized for treatment. In this study, we evaluated the anti-inflammatory therapeutical and protective effects of ruscogenin in a model of acute RP. Methods Thirty-two Sprague-Dawley rats were divided into 4 groups (n = 8) as sham, control, treatment, and prophylaxis groups. Prophylaxis group and treatment group were dosed ruscogenin by oral gavage for 14 days pre- and postradiation. At the end of the 28th day, all subjects were sacrificed. Results Histopathological analysis showed a significant increase in cryptitis abscess, cryptitis and reactive atypia, and depth of lymphocytic infiltration of the control group, compared to the other groups (P < 0.05), while treatment and prophylaxis groups showed significant decreases (P < 0.05). Immunohistochemical analysis indicated that immunoreactivity were significantly higher in control group (P < 0.05, P < 0.001, and P < 0.01, respectively), but vice versa for treatment and prophylaxis groups. There was not any significant difference for fibroblast growth factor 2 immunoreactivity. The epithelium of control rectums indicated an increase in TNF-α immunoreactivity while other groups had significant decrease (P < 0.01). Electron microscopical findings were parallel to light microscopy. Conclusion In this study, ruscogenin was observed to be effective on prophylaxis or treatment of acute RP. Although there are various reports on the treatment of the rectum damaged by acute RP in the literature, this could be the first study since there is no research indicating the ultrastructural effect of ruscogenin.
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Affiliation(s)
- Erkan Yavuz
- Department of General Surgery, Istanbul Bagcilar Training and Research Hospital, Istanbul, Turkey
| | - Onur Olgac Karagulle
- Department of General Surgery, Istanbul Bagcilar Training and Research Hospital, Istanbul, Turkey
| | - Gulcin Ercan
- Department of General Surgery, Istanbul Bagcilar Training and Research Hospital, Istanbul, Turkey
| | - Atilla Celik
- Department of General Surgery, Istanbul Bagcilar Training and Research Hospital, Istanbul, Turkey
| | - Hakan Yigitbas
- Department of General Surgery, Istanbul Bagcilar Training and Research Hospital, Istanbul, Turkey
| | - Busra Yaprak Bayrak
- Department of Pathology, Kocaeli Derince Training and Research Hospital, Kocaeli, Turkey
| | - Rumeysa Tartar
- Department of General Surgery, Istanbul Bagcilar Training and Research Hospital, Istanbul, Turkey
| | - Ramazan Kusaslan
- Department of General Surgery, Istanbul Bagcilar Training and Research Hospital, Istanbul, Turkey
| | - Yuksel Altinel
- Department of General Surgery, Istanbul Bagcilar Training and Research Hospital, Istanbul, Turkey
| | - Osman Bilgin Gulcicek
- Department of General Surgery, Istanbul Bagcilar Training and Research Hospital, Istanbul, Turkey
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Odawara S, Doi H, Shikata T, Kitajima K, Suzuki H, Niwa Y, Kosaka K, Tarutani K, Tsujimura T, Kamikonya N, Hirota S. Polaprezinc protects normal intestinal epithelium against exposure to ionizing radiation in mice. Mol Clin Oncol 2016; 5:377-381. [PMID: 27699029 PMCID: PMC5038609 DOI: 10.3892/mco.2016.983] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Accepted: 06/09/2016] [Indexed: 11/06/2022] Open
Abstract
Polaprezinc (PZ), an antiulcer drug, has been reported to have antioxidant effects. The purpose of the present study was to assess the radioprotective effects of PZ in the normal intestine of C57BL/6J mice. PZ was orally administered at 100 mg/kg body weight in the drinking water. Firstly, the present study compared the survival of normal intestinal crypt epithelial cells with mice that received PZ prior to or following irradiation. Next, the present study examined the sequential changes of the incidence of apoptosis in the normal intestine of mice that received irradiation. The mice that received PZ prior to irradiation demonstrated a stronger protective effect on the normal intestine compared with those that received PZ after irradiation. The present study therefore administrated PZ 2 h before irradiation in the subsequent experiments. The mice receiving PZ developed fewer apoptotic cells in the duodenum, jejunum and ileum. Radiation-induced cell death occurred with a peak at position 10 or lower from the base of the crypt axis, and was subsequently reduced by PZ treatment. Pretreatment with PZ protected the normal intestinal tissues from radiation-induced apoptosis.
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Affiliation(s)
- Soichi Odawara
- Department of Radiology, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Hiroshi Doi
- Department of Radiology, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Toshiyuki Shikata
- Department of Pharmacy, Hyogo College of Medicine Sasayama Medical Center, Sasayama, Hyogo 669-2321, Japan
| | - Kazuhiro Kitajima
- Department of Radiology, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Hitomi Suzuki
- Department of Radiology, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Yasue Niwa
- Department of Therapeutic Radiology, Uji-Tokushukai Medical Center, Uji, Kyoto 611-0041, Japan
| | - Kengo Kosaka
- Department of Radiology, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Kazuo Tarutani
- Department of Radiology, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Tohru Tsujimura
- Department of Pathology, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Norihiko Kamikonya
- Department of Radiology, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Shozo Hirota
- Department of Radiology, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
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Doi H, Fujiwara M, Suzuki H, Niwa Y, Nakayama M, Shikata T, Odawara S, Takada Y, Kimura T, Kamikonya N, Hirota S. Polaprezinc reduces the severity of radiation-induced mucositis in head and neck cancer patients. Mol Clin Oncol 2014; 3:381-386. [PMID: 25798271 DOI: 10.3892/mco.2014.479] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Accepted: 12/12/2014] [Indexed: 11/05/2022] Open
Abstract
Polaprezinc (PZ), an antiulcer drug, has been reported to have antioxidant properties. The aim of the present study was to assess the feasibility and efficacy of administering PZ for radiation-induced mucositis in head and neck cancer patients. Patients with newly diagnosed head and neck cancer were enrolled in this prospective study. PZ was prepared as an oral rinse. The PZ oral rinse was used four times per day during the course of radiotherapy. Sequential changes in radiation mucositis were assessed during and after radiotherapy according to the Common Terminology Criteria for Adverse Events, version 3.0. Furthermore, a retrospective comparison analysis was performed to assess the efficacy of PZ for radiation-induced mucositis. A total of 32 patients were enrolled in the prospective study of the PZ oral rinse. Radiotherapy was performed up to a total dose of 60-66 Gy using a conventional schedule combined with chemotherapy. Of the 32 patients, 30 (93.8%) reported no complaints due to the PZ oral rinse. In addition, PZ was not associated with severe adverse effects. Among the patients who received PZ, grade 3 mucositis was observed in 29.0% based on the mucosal findings and in 39.3% based on the symptoms. In the patients who did not receive PZ, the incidence of grade 3 mucositis was 40.0% based on the mucosal findings and 60.7% based on the symptoms. Moreover, PZ promoted the recovery from mucositis caused by chemoradiotherapy and was not associated with reduced tumor response to radiotherapy. Therefore, the PZ oral rinse was well tolerated and proved to be efficient for the treatment of radiotherapy-induced oral mucositis.
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Affiliation(s)
- Hiroshi Doi
- Department of Radiology, Hyogo College of Medicine, The Hospital of Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Masayuki Fujiwara
- Department of Radiology, Hyogo College of Medicine, The Hospital of Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Hitomi Suzuki
- Department of Radiology, Hyogo College of Medicine, The Hospital of Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Yasue Niwa
- Department of Radiology, Hyogo College of Medicine, The Hospital of Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Masahiro Nakayama
- Department of Pharmacy, The Hospital of Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Toshiyuki Shikata
- Department of Pharmacy, The Hospital of Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Soichi Odawara
- Department of Radiology, Hyogo College of Medicine, The Hospital of Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Yasuhiro Takada
- Department of Radiology, Hyogo College of Medicine, The Hospital of Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Takeshi Kimura
- Department of Pharmacy, The Hospital of Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Norihiko Kamikonya
- Department of Radiology, Hyogo College of Medicine, The Hospital of Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Shozo Hirota
- Department of Radiology, Hyogo College of Medicine, The Hospital of Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
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Gültekin FA, Bakkal BH, Sümer D, Köktürk F, Bektaş S. Effects of ozonated olive oil on acute radiation proctitis in rats. Balkan Med J 2013; 30:369-74. [PMID: 25207143 DOI: 10.5152/balkanmedj.2013.9158] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Accepted: 07/22/2013] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Acute radiation proctitis is a common complication of pelvic radiation and management of acute radiation proctitis is under evaluation. The beneficial effects of ozonated olive oil (OzOO) have already been shown in the treatment of chronic wounds. Thus, this study was designed to evaluate the therapeutic effects of topical OzOO on acute radiation proctitis. AIMS To evaluate the therapeutic effects of topical OzOO on acute radiation proctitis. STUDY DESIGN Animal experimentation. METHODS RATS WERE DIVIDED INTO THREE GROUPS: control; irradiation+saline (1 mL); and irradiation +OzOO (1 mL). A single fraction of 17.5 Gy was delivered to each rat. The OzOO was administered rectally each day after irradiation. Each rat was observed daily for signs of proctitis. Irradiated rats were euthanised on days 5 and 10. The mucosal changes were evaluated macroscopically and pathologically. RESULTS According to the clinical findings, five rats in the irradiation+saline group showed Grade 4 symptoms on the 10(th) day. Macroscopic finding scores on the 10(th) day in the irradiation+saline and irradiation+OzOO groups were statistically significantly different. On pathological examination, radiation-induced mucosal damage was the most prominent 10 days after irradiation in saline-treated rats. On the 10(th) day, the irradiation+OzOO group showed mild inflammation and slight crypt change, which corresponded to Grade 1 pathological findings. CONCLUSION OzOO attenuates macroscopic and pathological findings of acute radiation proctitis in rats.
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Affiliation(s)
- Fatma Ayça Gültekin
- Department of General Surgery, Bülent Ecevit University Faculty of Medicine, Zonguldak, Turkey
| | - Bekir Hakan Bakkal
- Department of Radiation Oncology, Bülent Ecevit University Faculty of Medicine, Zonguldak, Turkey
| | - Demet Sümer
- Department of General Surgery, Bülent Ecevit University Faculty of Medicine, Zonguldak, Turkey
| | - Füruzan Köktürk
- Department of Biostatistics, Bülent Ecevit University Faculty of Medicine, Zonguldak, Turkey
| | - Sibel Bektaş
- Department of Pathology, Bülent Ecevit University Faculty of Medicine, Zonguldak, Turkey
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Doi H, Kamikonya N, Takada Y, Niwa Y, Fujiwara M, Tsuboi K, Miura H, Inoue H, Tanooka M, Nakamura T, Shikata T, Kimura T, Tsujimura T, Hirota S. Low-Dose Aspirin Therapy Does not Increase the Severity of Acute Radiation Proctitis. World J Oncol 2012; 3:173-181. [PMID: 29147301 PMCID: PMC5649840 DOI: 10.4021/wjon559w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/10/2012] [Indexed: 02/02/2023] Open
Abstract
Background Although anticoagulation therapy is commonly used in the prostate cancer population, there are only a few studies about the correlation between radiation proctitis and anticoagulation therapy. The purpose of the present study was to determine whether low-dose aspirin increases the severity of acute radiation proctitis in an experimental animal model. Methods Wistar rats were used in the present study. The rats were administered either aspirin at doses of 5, 10, and 20 mg/kg, or saline, daily before and after irradiation. The rats were irradiated to the rectum as a single fraction of 25 Gy. The rectal mucosal changes of each rat were evaluated macroscopically and pathologically on the tenth day following irradiation. The findings of proctitis were graded from 0 to 4, and then were compared with regard to the status. Results No apparent correlations were observed between the administration of aspirin and the severity of radiation proctitis in the macroscopic findings and in the morphological mucosal damage in the pathological examination. The proportion of rats with a severe degree of mucosal inflammation was 90.0%, 100.0%, 16.7% and 100.0% at 5 mg/kg, 10 mg/kg, and 20 mg/kg of aspirin, or saline, respectively. The rats receiving aspirin at the dose of 20 mg/kg showed significantly milder inflammation than the other groups (P < 0.05). Conclusions In the present study, low-dose aspirin did not increase the severity of acute radiation proctitis. In addition, aspirin might decrease the severity of radiation-induced mucosal inflammation in the rectum.
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Affiliation(s)
- Hiroshi Doi
- Department of Radiology, Hyogo College of Medicine, 1-1, Mukogawa-cho, Nishinomiya City, Hyogo, Japan
| | - Norihiko Kamikonya
- Department of Radiology, Hyogo College of Medicine, 1-1, Mukogawa-cho, Nishinomiya City, Hyogo, Japan
| | - Yasuhiro Takada
- Department of Radiology, Hyogo College of Medicine, 1-1, Mukogawa-cho, Nishinomiya City, Hyogo, Japan
| | - Yasue Niwa
- Department of Radiology, Hyogo College of Medicine, 1-1, Mukogawa-cho, Nishinomiya City, Hyogo, Japan
| | - Masayuki Fujiwara
- Department of Radiology, Hyogo College of Medicine, 1-1, Mukogawa-cho, Nishinomiya City, Hyogo, Japan
| | - Keita Tsuboi
- Department of Radiology, Hyogo College of Medicine, 1-1, Mukogawa-cho, Nishinomiya City, Hyogo, Japan
| | - Hideharu Miura
- Department of Radiology, Hyogo College of Medicine, 1-1, Mukogawa-cho, Nishinomiya City, Hyogo, Japan
| | - Hiroyuki Inoue
- Department of Clinical Radiology, The Hospital of Hyogo College of Medicine, 1-1, Mukogawa-cho, Nishinomiya City, Hyogo, Japan
| | - Masao Tanooka
- Department of Radiology, Hyogo College of Medicine, 1-1, Mukogawa-cho, Nishinomiya City, Hyogo, Japan
| | - Takeshi Nakamura
- Department of Pharmacy, The Hospital of Hyogo College of Medicine, 1-1, Mukogawa-cho, Nishinomiya City, Hyogo, Japan
| | - Toshiyuki Shikata
- Department of Pharmacy, The Hospital of Hyogo College of Medicine, 1-1, Mukogawa-cho, Nishinomiya City, Hyogo, Japan
| | - Takeshi Kimura
- Department of Pharmacy, The Hospital of Hyogo College of Medicine, 1-1, Mukogawa-cho, Nishinomiya City, Hyogo, Japan
| | - Tohru Tsujimura
- Department of Pathology, Hyogo College of Medicine, 1-1, Mukogawa-cho, Nishinomiya City, Hyogo, Japan
| | - Shozo Hirota
- Department of Radiology, Hyogo College of Medicine, 1-1, Mukogawa-cho, Nishinomiya City, Hyogo, Japan
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Doi H, Kamikonya N, Takada Y, Fujiwara M, Tsuboi K, Miura H, Inoue H, Tanooka M, Nakamura T, Shikata T, Kimura T, Tsujimura T, Hirota S. Long-term sequential changes of radiation proctitis and angiopathy in rats. JOURNAL OF RADIATION RESEARCH 2012; 53:217-224. [PMID: 22510594 DOI: 10.1269/jrr.11075] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The purpose of the present study was to establish an experimental rat model for late radiation proctitis, and to examine the assessment strategy for late radiation proctitis. A total of 57 Wistar rats were used. Fourty-five of the rats were exposed to selective rectal irradiation with a single fraction of 25 Gy. These rats were sacrificed at the 4(th), 12(th), 24(th), and 37(th) week following irradiation. The remaining 12 rats comprised the control group without irradiation. The rectal mucosa of each rat was evaluated macroscopically and pathologically. The number of vessels in the rectal mucosa was counted microscopically. In addition, the vascular stenosis was evaluated. In the results, the degree of clinical and macroscopic findings decreased following acute proctitis and developed later. In the pathological examination, mucosal changes and microangiopathy were followed up, as well. The absolute number of vessels in the rectum was the greatest at the 12(th) week following irradiation and was the lowest in the control group. The severity of the microangiopathy was also well evaluated. To conclude, we established an animal experimental model of late radiation proctitis, and also established an assessment strategy to evaluate objectively the severity of late radiation proctitis with focusing on microangiopathy using an animal experimental model. This model can be used as an animal experimental model of radiation-induced microangiopathy.
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Affiliation(s)
- Hiroshi Doi
- Department of Radiology, Hyogo College of Medicine, Nishinomiya City, Hyogo, 663-8501 Japan.
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