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Espírito Santo SG, Da Silva TC, Cogliati B, Barbisan LF, Romualdo GR. Panx1 knockout promotes preneoplastic aberrant crypt foci development in a chemically induced model of mouse colon carcinogenesis. Int J Exp Pathol 2023; 104:304-312. [PMID: 37594023 PMCID: PMC10652697 DOI: 10.1111/iep.12491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 06/18/2023] [Accepted: 08/03/2023] [Indexed: 08/19/2023] Open
Abstract
Colorectal cancer, which is the third leading cause of cancer-related deaths worldwide, is a multistep disease, featuring preneoplastic aberrant crypt foci (ACF) as the early morphological manifestation. The roles of hemichannel-forming transmembrane Pannexin 1 (Panx1) protein have not been investigated in the context of colon carcinogenesis yet, although it has contrasting roles in other cancer types. Thus, this study was conducted to examine the effects of Panx1 knockout (Panx1-/- ) on the early events of chemically induced colon carcinogenesis in mouse. Wild type (WT) and Panx1-/- female C57BL6J mice were submitted to a chemically induced model of colon carcinogenesis by receiving six intraperitoneal administrations of 1,2-dimethylhydrazine (DMH) carcinogen. Animals were euthanized 8 h (week 7) or 30 weeks (week 37) after the last DMH administration in order to evaluate sub-acute colon toxicity outcomes or the burden of ACF, respectively. At week 7, Panx1 genetic ablation increased DMH-induced genotoxicity in peripheral blood cells, malondialdehyde levels in the colon, and apoptosis (cleaved caspase-3) in colonic crypts. Of note, at week 37, Panx1-/- animals showed an increase in aberrant crypts (AC), ACF mean number, and ACF multiplicity (AC per ACF) by 56%, 57% and 20%, respectively. In essence, our findings indicate that Panx1 genetic ablation promotes preneoplastic ACF development during chemically induced mouse colon carcinogenesis, and a protective role of Panx1 is postulated.
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Affiliation(s)
- Sara Gomes Espírito Santo
- Botucatu Medical School, Experimental Research Unit (UNIPEX), Multimodel Drug Screening Platform – Laboratory of Chemically Induced and Experimental Carcinogenesis (MDSP‐LCQE)São Paulo State University (UNESP)BotucatuSão Paulo StateBrazil
| | - Tereza Cristina Da Silva
- School of Veterinary Medicine and Animal Science, Department of PathologyUniversity of São Paulo (USP)São PauloSão Paulo StateBrazil
| | - Bruno Cogliati
- School of Veterinary Medicine and Animal Science, Department of PathologyUniversity of São Paulo (USP)São PauloSão Paulo StateBrazil
| | - Luís Fernando Barbisan
- Botucatu Medical School, Experimental Research Unit (UNIPEX), Multimodel Drug Screening Platform – Laboratory of Chemically Induced and Experimental Carcinogenesis (MDSP‐LCQE)São Paulo State University (UNESP)BotucatuSão Paulo StateBrazil
- Biosciences Institute, Department of Structural and Functional BiologySão Paulo State University (UNESP)São Paulo StateBrazil
| | - Guilherme Ribeiro Romualdo
- Botucatu Medical School, Experimental Research Unit (UNIPEX), Multimodel Drug Screening Platform – Laboratory of Chemically Induced and Experimental Carcinogenesis (MDSP‐LCQE)São Paulo State University (UNESP)BotucatuSão Paulo StateBrazil
- Biosciences Institute, Department of Structural and Functional BiologySão Paulo State University (UNESP)São Paulo StateBrazil
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Masumura K, Ando T, Ukai A, Fujiwara S, Yokose S, You X, Suzuki T, Hayashi H, Nohmi T, Takagi H, Honma M. New homozygous gpt delta transgenic rat strain improves an efficiency of the in vivo mutagenicity assay. Genes Environ 2021; 43:25. [PMID: 34158118 PMCID: PMC8220708 DOI: 10.1186/s41021-021-00195-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 05/27/2021] [Indexed: 02/22/2023] Open
Abstract
Background Gene mutation assays in transgenic rodents are useful tools to investigate in vivo mutagenicity in a target tissue. Using a lambda EG10 transgene containing reporter genes, gpt delta transgenic mice and rats have been developed to detect point mutations and deletions. The transgene is integrated in the genome and can be rescued through an in vitro packaging reaction. However, the packaging efficiency is lower in gpt delta rats than in mice, because of the transgene in gpt delta rats being heterozygous and in low copy number. To improve the packaging efficiency, we herein describe a newly developed homozygous gpt delta rat strain. Results The new gpt delta rat has a Wistar Hannover background and has been successfully maintained as homozygous for the transgene. The packaging efficiency in the liver was 4 to 8 times higher than that of existing heterozygous F344 gpt delta rats. The frequency of gpt point mutations significantly increased in the liver and bone marrow of N-nitroso-N-ethylurea (ENU)- and benzo[a]pyrene (BaP)-treated rats. Spi− deletion frequencies significantly increased in the liver and bone marrow of BaP-treated rats but not in ENU-treated rats. Whole genome sequencing analysis identified ≥ 30 copies of lambda EG10 transgenes integrated in rat chromosome 1. Conclusions The new homozygous gpt delta rat strain showed a higher packaging efficiency, and could be useful for in vivo gene mutation assays in rats. Supplementary Information The online version contains supplementary material available at 10.1186/s41021-021-00195-1.
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Affiliation(s)
- Kenichi Masumura
- Division of Genetics and Mutagenesis, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa, 210-9501, Japan.
| | - Tomoko Ando
- Division of Genetics and Mutagenesis, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa, 210-9501, Japan
| | - Akiko Ukai
- Division of Genetics and Mutagenesis, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa, 210-9501, Japan
| | - Sho Fujiwara
- Biotechnical Center, Japan SLC, Inc., 3-5-1, Aoihigashi, Naka-ku, Hamamatsu-shi, Shizuoka, 433-8114, Japan
| | - Shigeo Yokose
- Biotechnical Center, Japan SLC, Inc., 3-5-1, Aoihigashi, Naka-ku, Hamamatsu-shi, Shizuoka, 433-8114, Japan
| | - Xinyue You
- Division of Molecular Target and Gene Therapy Products, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, 210-9501, Kawasaki-shi, Kanagawa, Japan.,School of Public Health, Hongqiao International Institute of Medicine, Shanghai Jiao Tong University School of Medicine, 227 South Chongqing Road, Shanghai, 200025, China
| | - Takayoshi Suzuki
- School of Public Health, Hongqiao International Institute of Medicine, Shanghai Jiao Tong University School of Medicine, 227 South Chongqing Road, Shanghai, 200025, China
| | - Hiroyuki Hayashi
- Biologics Business Planning & Operation Dept, Meiji Seika Pharma Co., Ltd, 2-4-16 Kyobashi Chuo- ku, Tokyo, 104-8002, Japan
| | - Takehiko Nohmi
- Division of Pathology, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa, 210-9501, Japan
| | - Hisayoshi Takagi
- Biotechnical Center, Japan SLC, Inc., 3-5-1, Aoihigashi, Naka-ku, Hamamatsu-shi, Shizuoka, 433-8114, Japan
| | - Masamitsu Honma
- Division of Genetics and Mutagenesis, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki-shi, Kanagawa, 210-9501, Japan
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Fidelis M, Santos JS, Escher GB, Rocha RS, Cruz AG, Cruz TM, Marques MB, Nunes JB, do Carmo MAV, de Almeida LA, Kaneshima T, Azevedo L, Granato D. Polyphenols of jabuticaba [Myrciaria jaboticaba (Vell.) O.Berg] seeds incorporated in a yogurt model exert antioxidant activity and modulate gut microbiota of 1,2-dimethylhydrazine-induced colon cancer in rats. Food Chem 2021; 334:127565. [PMID: 32717686 DOI: 10.1016/j.foodchem.2020.127565] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 07/01/2020] [Accepted: 07/09/2020] [Indexed: 12/15/2022]
Abstract
The chemical composition, antioxidant activity (AA), cytotoxic activity, antihemolytic effects, and enzyme inhibition (EI) of lyophilized jabuticaba (Myrciaria jaboticaba) seed extract (LJE) was studied. The main compounds found were castalagin, vescalagin, procyanidin A2, and ellagic acid. LJE was more toxic to cancer cells than to normal cells, meaning relative toxicological safety. This cytotoxic effect can be attributed to the pro-oxidant effect observed in the reactive oxygen species (ROS) generation assay. LJE inhibited α-amylase, α-glucosidase, and ACE-I activities and protected human erythrocytes from hemolysis. LJE was incorporated into yogurts at different concentrations and the total phenolic content, AA, and EI increased in a dose-dependent manner. LJE-containing yogurt presented 86% sensory acceptance. The yogurt was administered to Wistar rats bearing cancer and it modulated the gut bacterial microbiota, having a prebiotic effect. LJE is a potential functional ingredient for food companies looking for TPC, AA, and prebiotic effect in vivo.
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Affiliation(s)
- Marina Fidelis
- Department of Food Engineering, State University of Ponta Grossa (UEPG), Av. Carlos Cavalcanti, 4748, 84030-900, Ponta Grossa, Brazil
| | - Jânio Sousa Santos
- Department of Food Engineering, State University of Ponta Grossa (UEPG), Av. Carlos Cavalcanti, 4748, 84030-900, Ponta Grossa, Brazil
| | - Graziela Bragueto Escher
- Department of Food Engineering, State University of Ponta Grossa (UEPG), Av. Carlos Cavalcanti, 4748, 84030-900, Ponta Grossa, Brazil
| | - Ramon Silva Rocha
- Federal Institute of Education, Science and Technology from Rio de Janeiro (IFRJ), 20270-021 Rio de Janeiro, Brazil
| | - Adriano Gomes Cruz
- Federal Institute of Education, Science and Technology from Rio de Janeiro (IFRJ), 20270-021 Rio de Janeiro, Brazil
| | - Thiago Mendanha Cruz
- Department of Chemistry, State University of Ponta Grossa, 84030-900, Ponta Grossa, Brazil
| | | | - Juliana Barbosa Nunes
- Department of Pathology, College of Medicine, University of São Paulo, São Paulo, Brazil
| | | | - Leonardo Augusto de Almeida
- Department of Microbiology and Immunology, Federal University of Alfenas, Rua Gabriel Monteiro da Silva, 714, 37130-000, Alfenas, Brazil
| | - Tai Kaneshima
- Department of Nutritional Science and Food Safety, Faculty of Applied Biosciences, Tokyo University of Agriculture, Tokyo 156-8502, Japan
| | - Luciana Azevedo
- Faculty of Nutrition, Federal University of Alfenas, Rua Gabriel Monteiro da Silva, 714, 37130-000, Alfenas, Brazil.
| | - Daniel Granato
- Department of Food Engineering, State University of Ponta Grossa (UEPG), Av. Carlos Cavalcanti, 4748, 84030-900, Ponta Grossa, Brazil; Food Processing and Quality, Innovative Food System, Production Systems Unit, Natural Resources Institute Finland (Luke), Tietotie 2, FI-02150 Espoo, Finland.
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