Journal of Toxicologic Pathology最新文献_第9页

The potential of organoids in toxicologic pathology: Histopathological and immunohistochemical evaluation of a mouse normal tissue-derived organoid-based carcinogenesis model. 类器官在毒理学病理学中的潜力:小鼠正常组织来源的类器官癌变模型的组织病理学和免疫组织化学评估。

IF 1.2 4区医学

Journal of Toxicologic Pathology Pub Date : 2022-07-01 Epub Date: 2022-04-22 DOI: 10.1293/tox.2022-0021

Rikako Ishigamori, Mie Naruse, Akihiro Hirata, Yoshiaki Maru, Yoshitaka Hippo, Toshio Imai

{"title":"The potential of organoids in toxicologic pathology: Histopathological and immunohistochemical evaluation of a mouse normal tissue-derived organoid-based carcinogenesis model.","authors":"Rikako Ishigamori, Mie Naruse, Akihiro Hirata, Yoshiaki Maru, Yoshitaka Hippo, Toshio Imai","doi":"10.1293/tox.2022-0021","DOIUrl":"https://doi.org/10.1293/tox.2022-0021","url":null,"abstract":"Recently, we introduced an organoid-based chemical carcinogenesis model using mouse normal tissue-derived organoids. In the present review article, the histopathological and immunohistochemical characteristics of mouse normal tissue-derived organoids and tumors derived from these organoids after their in vitro treatment with genotoxic carcinogens and injection into nude mouse are reviewed. In organoids treated in vitro with genotoxic carcinogens, we confirmed macroscopic tumorigenicity and histopathological findings, including neoplastic characteristics, such as multilayered epithelia and/or invasion of epithelia into the surrounding interstitium. In contrast glandular/cystic structures with monolayered epithelia were clearly demarcated from the surrounding Matrigel/interstitium in the untreated control groups. In addition to macroscopic tumorigenicity, these microscopic epithelial changes, which are characteristic of the early stages of carcinogenesis, are included in the requirements for carcinogenicity-positive judgement of the organoid-based carcinogenesis model. Immunohistochemistry of cytokeratins (CKs), used to determine the origin of epithelia and distribution of extraductal invasive lesions, or oncogenic kinases, which reflect molecular activation in epithelia following chemical treatment, is helpful for accurate diagnosis and molecular evaluation in the early stages of carcinogenesis. This information improves our biological understanding of organoid-based chemical carcinogenesis models.","PeriodicalId":17437,"journal":{"name":"Journal of Toxicologic Pathology","volume":"35 3","pages":"211-223"},"PeriodicalIF":1.2,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/80/5b/tox-35-211.PMC9255998.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40503981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Testicular alterations in cryptorchid/orchiopexic rats chronically exposed to acrylamide or di-butyl-phthalate 慢性暴露于丙烯酰胺或邻苯二甲酸二丁酯的隐睾/睾丸缺乏大鼠睾丸改变

IF 1.2 4区医学

Journal of Toxicologic Pathology Pub Date : 2022-04-13 DOI: 10.1293/tox.2021-0045

Thania R. R. Lima, Nathália P. Souza, Ana P. Ferragut Cardoso, Lígia M. M. Gomide, Merielen G. Nascimento e Pontes, Hélio A. Miot, Lora L. Arnold, Samuel M. Cohen, João Lauro V. de Camargo

{"title":"Testicular alterations in cryptorchid/orchiopexic rats chronically exposed to acrylamide or di-butyl-phthalate","authors":"Thania R. R. Lima, Nathália P. Souza, Ana P. Ferragut Cardoso, Lígia M. M. Gomide, Merielen G. Nascimento e Pontes, Hélio A. Miot, Lora L. Arnold, Samuel M. Cohen, João Lauro V. de Camargo","doi":"10.1293/tox.2021-0045","DOIUrl":"https://doi.org/10.1293/tox.2021-0045","url":null,"abstract":" Exposure of Sprague-Dawley (SD) rats to acrylamide (AA) or di-butyl-phthalate (DBP) from the 12th gestational day to the 16th postnatal week (PNW) has been shown to reduce the effectiveness of orchiopexy in recovering the testicular alterations associated with experimental cryptorchidism established at weaning. Herein, we provide information about the long-term effects of AA or DBP on the testes of cryptorchid/orchiopexic rats. Male offspring exposed in utero to 10 mg/kg/day AA or 500 mg/kg/day DBP underwent bilateral surgical cryptorchidism at the 3rd PNW and orchiopexy at the 6th week, with continuous exposure to the chemicals through diet until the 58th week. Regardless of the test chemical, there were severe qualitative/quantitative alterations in the seminiferous tubules and increased numbers of Leydig cells. There was an increase and decrease in the number of tubules with c-Kit- and placental alkaline phosphatase-labeled germ cells, respectively, as compared to those in the control group, suggesting an imbalance between apoptosis and cell proliferation processes. The histological scores of the testicular lesions at the end of this one-year study were higher than those in the previous 16-week study, indicating that exposure of rats to the toxicants AA or DBP enhanced the testicular alterations induced by the chemicals beginning at the intra-uterine life, and impaired the effectiveness of orchiopexy in restoring the testes to normal morphology. Although the present experimental protocol does not completely replicate the natural human undescended testes, our findings may contribute to understanding the alterations occurring in cryptorchid/orchiopexic testes potentially exposed to exogenous chemicals for extended periods.\u0000","PeriodicalId":17437,"journal":{"name":"Journal of Toxicologic Pathology","volume":"122 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2022-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138518850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

LPS-TLR4/MD-2–TNF-α signaling mediates alcohol-induced liver fibrosis in rats LPS-TLR4/ MD-2-TNF -α信号介导酒精性大鼠肝纤维化

IF 1.2 4区医学

Journal of Toxicologic Pathology Pub Date : 2022-02-26 DOI: 10.1293/tox.2021-0018

Wensheng Mou, Shi-ru Chen, Zhengqi Wu, Libin Hu, Ji-ye Zhang, Hong-Jie Chang, Hang Zhou, Y. Liu

{"title":"LPS-TLR4/MD-2–TNF-α signaling mediates alcohol-induced liver fibrosis in rats","authors":"Wensheng Mou, Shi-ru Chen, Zhengqi Wu, Libin Hu, Ji-ye Zhang, Hong-Jie Chang, Hang Zhou, Y. Liu","doi":"10.1293/tox.2021-0018","DOIUrl":"https://doi.org/10.1293/tox.2021-0018","url":null,"abstract":"Liver fibrosis results from liver inflammation and progresses to liver cirrhosis or liver cancer. It is known that nonalcoholic liver disease is mediated by the Toll-like receptor 4 (TLR4)/myeloid differentiation factor-2 (MD-2)–tumor necrosis factor-alpha (TNF-α) signaling pathway. This study aimed to investigate whether alcoholic liver disease is also mediated by this pathway. To this end, we first established rat models of liver fibrosis by administering alcohol. Next, the rats were injected with anti-TLR4 and anti-MD-2 antibodies. Real Time Quantitative PCR (RT-qPCR) and Western blotting were used to detect the activation of the TLR4/MD-2–TNF-α signaling pathway and hepatic stellate cells (HSCs). Moreover, the expression of molecules related to liver fibrosis was estimated. The morphology of rat liver tissue was observed through hematoxylin–eosin staining and Masson staining. For in vitro studies, Kupffer cells (KCs) isolated from the liver were transfected with si-TLR4 and si-MD-2 and co-cultured with HSCs to determine the activity of HSCs. It was found that alcohol treatment activated the TLR4/MD-2–TNF-α signaling pathway and upregulated the molecules associated with liver fibrosis. However, inhibition of TLR4 and MD-2 partially reversed this trend. Notably, in vitro studies indicated that knockdown of TLR4 and MD-2 in KCs partially inhibited LPS-induced activation of KCs and HSCs. Overall, this study showed that alcohol induces liver fibrosis via the LPS-TLR4/MD-2–TNF-α signaling pathway.","PeriodicalId":17437,"journal":{"name":"Journal of Toxicologic Pathology","volume":"35 1","pages":"193 - 203"},"PeriodicalIF":1.2,"publicationDate":"2022-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48268443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

rasH2 mouse: reproducibility and stability of carcinogenicity due to a standardized production and monitoring system. rasH2小鼠:由于标准化的生产和监测系统，致癌性的重复性和稳定性

IF 0.9 4区医学

Journal of Toxicologic Pathology Pub Date : 2022-01-01 Epub Date: 2021-11-19 DOI: 10.1293/tox.2021-0068

Hideki Tsutsumi, Ryo Inoue, Masahiko Yasuda, Riichi Takahashi, Masami Suzuki, Koji Urano

{"title":"rasH2 mouse: reproducibility and stability of carcinogenicity due to a standardized production and monitoring system.","authors":"Hideki Tsutsumi, Ryo Inoue, Masahiko Yasuda, Riichi Takahashi, Masami Suzuki, Koji Urano","doi":"10.1293/tox.2021-0068","DOIUrl":"10.1293/tox.2021-0068","url":null,"abstract":"The rasH2 mouse was developed as a model for carcinogenicity studies in regulatory science. Its phenotype is stable during high-volume production and over successive generations. To produce rasH2 mice, three strains of mice (C57BL/6J-TgrasH2, C57BL/6J, and BALB/cByJ) were maintained individually. Since the homozygous c-HRAS genotype is lethal, hemizygous transgenic mice were maintained by crossing with inbred C57BL/6J mice. After breeding, male B6-transgenic mice were mated with female BALB/cByJ mice to obtain transgenic mice. Pups that were rasH2-Tg (tg/wt) or rasH2-Wt (wt/wt) were confirmed by genotyping. Frozen embryos were preserved by the Central Institute for Experimental Animals (CIEA) and sent to two facilities, CLEA Japan and Taconic Biosciences, where the mice were produced. Production colonies are created in both facilities and supplied to customers worldwide. To prevent genetic drift, the colonies were renewed for up to 10 generations, and renewals were carried out four times every five years from 2005 to 2021. To ensure the uniformity and maintenance of the phenotype of rasH2 mice, the carcinogen susceptibilities were monitored in every renewal of colonies by CIEA based on a standard protocol of the short-term carcinogenicity study using the positive control compound N-methyl-N-nitrosourea (MNU). Furthermore, simple carcinogenicity monitoring targeting the forestomach, the organ most sensitive to MNU, was performed approximately once a year. Based on the optimally designed production and monitoring systems, the quality of rasH2 mice with reproducibility and stability of carcinogenicity is maintained and supplied globally.","PeriodicalId":17437,"journal":{"name":"Journal of Toxicologic Pathology","volume":"35 1","pages":"19-24"},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8828604/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45880536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Generation of a uniform thymic malignant lymphoma model with C57BL/6J p53 gene deficient mice C57BL/6J p53基因缺陷小鼠胸腺恶性淋巴瘤模型的建立

IF 1.2 4区医学

Journal of Toxicologic Pathology Pub Date : 2022-01-01 DOI: 10.1293/tox.2021-0022

Susu Liu, Jianjun Lyu, Qian-qian Li, Xi Wu, Yanwei Yang, Guitao Huo, Qingfen Zhu, Ming Guo, Yuelei Shen, Sanlong Wang, Changfa Fan

{"title":"Generation of a uniform thymic malignant lymphoma model with C57BL/6J p53 gene deficient mice","authors":"Susu Liu, Jianjun Lyu, Qian-qian Li, Xi Wu, Yanwei Yang, Guitao Huo, Qingfen Zhu, Ming Guo, Yuelei Shen, Sanlong Wang, Changfa Fan","doi":"10.1293/tox.2021-0022","DOIUrl":"https://doi.org/10.1293/tox.2021-0022","url":null,"abstract":"Lymphoma is the third most common cancer diagnosed in children, and T-cell lymphoma has the worst prognosis based on clinical observations. To date, a lymphoma model with uniform penetrance has not yet been developed. In this study, we generated a p53 deficient mouse model by targeting embryonic stem cells derived from a C57BL/6J mouse strain. Homozygous p53 deficient mice exhibited a higher rate of spontaneous tumorigenesis, with a high spontaneous occurrence rate (93.3%) of malignant lymphoma. Because tumor models with high phenotypic consistency are currently needed, we generated a lymphoma model by a single intraperitoneal injection of 37.5 or 75 mg/kg N-methyl-N-nitrosourea to p53 deficient mice. Lymphoma and retinal degeneration occurred in 100% of p53+/− mice administered with higher concentrations of N-methyl-N-nitrosourea, a much greater response than those of previously reported models. The main anatomic sites of lymphoma were the thymus, spleen, bone marrow, and lymph nodes. Both induced and spontaneous lymphomas in the thymus and spleen stained positive for CD3 antigen, and flow cytometry detected positive CD4 and/or CD8 cells. Based on our observations and previous data, we hypothesize that mice with a B6 background are prone to lymphomagenesis.","PeriodicalId":17437,"journal":{"name":"Journal of Toxicologic Pathology","volume":"35 1","pages":"25 - 36"},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46485370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Malignant stromal cell tumor of the spleen in a WBN/Kob rat WBN/Kob大鼠脾脏恶性间质细胞瘤

IF 1.2 4区医学

Journal of Toxicologic Pathology Pub Date : 2022-01-01 DOI: 10.1293/tox.2021-0067

Yui Terayama, T. Matsuura, K. Ozaki

引用次数: 0

Survey of tumorigenic sensitivity in 6-month rasH2-Tg mice studies compared with 2-year rodent assays. 6个月rasH2-Tg小鼠研究与2年啮齿动物试验的致瘤敏感性调查

IF 0.9 4区医学

Journal of Toxicologic Pathology Pub Date : 2022-01-01 Epub Date: 2021-11-01 DOI: 10.1293/tox.2021-0031

Shigeru Hisada, Kenjiro Tsubota, Kenji Inoue, Hisaharu Yamada, Takanori Ikeda, Frank D Sistare

{"title":"Survey of tumorigenic sensitivity in 6-month rasH2-Tg mice studies compared with 2-year rodent assays.","authors":"Shigeru Hisada, Kenjiro Tsubota, Kenji Inoue, Hisaharu Yamada, Takanori Ikeda, Frank D Sistare","doi":"10.1293/tox.2021-0031","DOIUrl":"10.1293/tox.2021-0031","url":null,"abstract":"The pharmacokinetic endpoint of a 25-fold increase in human exposure is one of the specified criteria for high-dose selection for 2-year carcinogenicity studies in rodents according to ICH S1C(R2). However, this criterion is not universally accepted for 6-month carcinogenicity tests in rasH2-Tg mice. To evaluate an appropriate multiple for rasH2-Tg mice, we evaluated data for 53 compounds across five categories of rasH2-Tg mouse-positive [(1) genotoxic and (2) non-genotoxic] carcinogens and rasH2-Tg mouse-negative [(3) non-genotoxic carcinogens with clear or uncertain human relevance; (4) non-genotoxic rodent-specific carcinogens; and (5) non-carcinogens], and surveyed their tumorigenic activities and high doses in rasH2-Tg mice and 2-year rodent models. Our survey indicated that area under the curve (AUC) margins (AMs) or body surface area-adjusted dose ratios (DRs) of tumorigenesis in rasH2-Tg mice to the maximum recommended human dose (MRHD) were 0.05- to 5.2-fold in 6 category (1) compounds with small differences between models and 0.2- to 47-fold in 7 category (2) including three 2-year rat study-negative compounds. Among all 53 compounds, including 40 compounds of the rasH2-Tg mouse-negative category (3), (4), and (5), no histopathologic risk factors for rodent neoplasia were induced only at doses above 50-fold AM or DR in rasH2-Tg mice except for two compounds, which induced hyperplasia and had no relationship with the tumors observed in the rasH2-Tg mouse or 2-year rodent studies. From the results of these surveys, we confirmed that exceeding a high dose level of 50-fold AM in rasH2-Tg mouse carcinogenicity studies does not appear to be of value.","PeriodicalId":17437,"journal":{"name":"Journal of Toxicologic Pathology","volume":"35 1","pages":"53-73"},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8828610/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43229605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Elevated level of microRNA-210 at the initiation of muscular regeneration in acetic acid-induced non-ischemic skeletal muscular injury in mice 醋酸诱导小鼠非缺血性骨骼肌损伤后肌肉再生开始时microRNA-210水平升高

IF 1.2 4区医学

Journal of Toxicologic Pathology Pub Date : 2021-12-24 DOI: 10.1293/tox.2021-0061

Y. Takai, Takeshi Watanabe, T. Sano

{"title":"Elevated level of microRNA-210 at the initiation of muscular regeneration in acetic acid-induced non-ischemic skeletal muscular injury in mice","authors":"Y. Takai, Takeshi Watanabe, T. Sano","doi":"10.1293/tox.2021-0061","DOIUrl":"https://doi.org/10.1293/tox.2021-0061","url":null,"abstract":"The alteration in microRNA-210 level, a hypoxia-inducible microRNA, is not well known in non-ischemic tissue injury. In this study, we characterized the histopathological time course of acetic acid-induced skeletal muscle injury as a non-ischemic tissue injury model and investigated the expression of microRNA-210, hypoxia-inducible factor 1α, and growth factors using quantitative polymerase chain reaction analysis. After a single intramuscular dose of 3% (v/v) acetic acid to C57BL/6J mice, focal coagulative necrosis of muscle fibers was noted from 3 h after dosing and infiltration of F4/80 and Galectin-3 positive M2 macrophage was noted at 1 d after dosing. Muscular regeneration was initiated from 3 d, when M2 macrophage infiltration was most prominent, till 14 d after dosing. Hif1α and Hgf expression increased from 3 h onwards, and microRNA-210 level increased after 3 d after the treatment. However, no clear elevation in the levels of Igf1 or Vegf was observed. The infiltrative macrophages and regenerative muscle fibers were positive for hypoxia-inducible factor 1α, microRNA-210, and hepatocyte growth factor as assessed by immunohistochemistry or in situ hybridization. In this study, dominant infiltration of M2 macrophages at muscular necrosis and subsequent regeneration after a single intramuscular injection of acetic acid in mice were observed. The increase in hif1α level was observed just after the muscular injury in this non-ischemic tissue injury model, and the elevation in microRNA-210 level was noted at the initiation of tissue regeneration, indicating its effects on tissue protection and repair.","PeriodicalId":17437,"journal":{"name":"Journal of Toxicologic Pathology","volume":"35 1","pages":"183 - 192"},"PeriodicalIF":1.2,"publicationDate":"2021-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49264074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microarray-based gene expression analysis combined with laser capture microdissection is beneficial in investigating the modes of action of ocular toxicity 基于微阵列的基因表达分析与激光捕获显微切割相结合有助于研究眼部毒性的作用模式

IF 1.2 4区医学

Journal of Toxicologic Pathology Pub Date : 2021-12-18 DOI: 10.1293/tox.2021-0064

M. Shirai, Noriyo Niino, K. Mori, Kiyonori Kai

{"title":"Microarray-based gene expression analysis combined with laser capture microdissection is beneficial in investigating the modes of action of ocular toxicity","authors":"M. Shirai, Noriyo Niino, K. Mori, Kiyonori Kai","doi":"10.1293/tox.2021-0064","DOIUrl":"https://doi.org/10.1293/tox.2021-0064","url":null,"abstract":"The retina consists of several layers, and drugs can affect the retina and choroid separately. Therefore, investigating the target layers of toxicity can provide useful information pertaining to its modes of action. Herein, we compared gene expression profiles obtained via microarray analyses using samples of target layers collected via laser capture microdissection and samples of the whole globe of the eye of rats treated with N-methyl-N-nitrosourea. Pathway analyses suggested changes in the different pathways between the laser capture microdissection samples and the whole globe samples. Consistent with the histological distribution of glial cells, upregulation of several inflammation-related pathways was noted only in the whole globe samples. Individual gene expression analyses revealed several gene expression changes in the laser capture microdissection samples, such as caspase- and glycolysis-related gene expression changes, which is similar to previous reports regarding N-methyl-N-nitrosourea-treated animals; however, caspase- and glycolysis-related gene expressions did not change or changed unexpectedly in the whole globe samples. Analyses of the laser capture microdissection samples revealed new potential candidate genes involved in the modes of action of N-methyl-N-nitrosourea-induced retinal toxicity. Collectively, our results suggest that specific retinal layers, which may be targeted by specific toxins, are beneficial in identifying genes responsible for drug-induced ocular toxicity.","PeriodicalId":17437,"journal":{"name":"Journal of Toxicologic Pathology","volume":"35 1","pages":"171 - 182"},"PeriodicalIF":1.2,"publicationDate":"2021-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45875390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CD44 expression in the bile duct epithelium is related to hepatic fibrosis in nonalcoholic steatohepatitis rats induced by a choline-deficient, methionine-lowered, L-amino acid diet 胆管上皮CD44表达与胆碱缺乏、蛋氨酸降低、l -氨基酸饮食诱导的非酒精性脂肪性肝炎大鼠肝纤维化有关

IF 1.2 4区医学

Journal of Toxicologic Pathology Pub Date : 2021-12-06 DOI: 10.1293/tox.2021-0069

K. Uno, K. Miyajima, M. Toma, Noriko Suzuki-Kemuriyama, D. Nakae

{"title":"CD44 expression in the bile duct epithelium is related to hepatic fibrosis in nonalcoholic steatohepatitis rats induced by a choline-deficient, methionine-lowered, L-amino acid diet","authors":"K. Uno, K. Miyajima, M. Toma, Noriko Suzuki-Kemuriyama, D. Nakae","doi":"10.1293/tox.2021-0069","DOIUrl":"https://doi.org/10.1293/tox.2021-0069","url":null,"abstract":"Nonalcoholic steatohepatitis is a lifestyle-related disease and an increasing threat worldwide. Hepatic fibrosis, which results from chronic hepatic diseases including nonalcoholic steatohepatitis, is closely correlated with mortality among hepatic lesions, such as steatosis and inflammation. Thus, it is important to identify factors that can serve as diagnostic and therapeutic targets for hepatic fibrosis. In this study, we examined the function of CD44 in the development of hepatic fibrosis in choline-deficient, methionine-lowered, L-amino-acid diet-fed rats, especially with respect to the proliferation of bile duct epithelium. Male Fischer 344 rats were fed a choline-deficient, methionine-lowered, L-amino-acid diet for 2, 4, 13, or 26 weeks. This diet decreased the body weight; increased the levels of serum parameters indicating liver injury, such as aspartate and alanine aminotransferase; upregulated inflammation- and fibrosis-related gene expression in the liver; and resulted in the development of hepatic lesions, including fatty changes in hepatocytes, inflammatory cell infiltration, and fibrosis. Hepatic hyaluronan was synthesized and deposited in the liver tissue. The expression of both CD44 mRNA and protein was significantly increased throughout the experimental period. CD44 protein was observed in some of the bile duct epithelium, around which hyaluronic acid was deposited, and these bile duct lesions were concordant with the area of hepatic fibrosis. Thus, CD44 expressed in the bile duct epithelium may be a target for controlling nonalcoholic steatohepatitis-related hepatic fibrosis.","PeriodicalId":17437,"journal":{"name":"Journal of Toxicologic Pathology","volume":"35 1","pages":"149 - 157"},"PeriodicalIF":1.2,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42334954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3