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Teoh YB, Ishizaki T, Kagawa Y, Yokoyama S, Jelinek J, Matsumoto Y, Tomiyasu H, Tsujimoto H, Takiguchi M, Yamazaki J. Use of genome-wide DNA methylation analysis to identify prognostic CpG site markers associated with longer survival time in dogs with multicentric high-grade B-cell lymphoma. J Vet Intern Med 2024; 38:316-325. [PMID: 38115210 PMCID: PMC10800228 DOI: 10.1111/jvim.16931] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Accepted: 10/25/2023] [Indexed: 12/21/2023] Open
Abstract
BACKGROUND DNA methylation analysis might identify prognostic CpG sites in CHOP-treated dogs with multicentric high-grade B-cell lymphoma (MHGL) with heterogenous prognosis. OBJECTIVE To identify prognostic CpG sites of MHGL through genome-wide DNA methylation analysis with pyrosequencing validation. ANIMALS Test group: 24 dogs. Validation group: 100 dogs. All client-owned dogs were diagnosed with MHGL and treated with CHOP chemotherapy. METHODS Cohort study. DNA was extracted from lymph node samples obtained via FNA. Genome-wide DNA methylation analysis using Digital Restriction Enzyme Analysis of Methylation (DREAM) was performed on the test group to identify differentially methylated CpG sites (DMCs). Bisulfite pyrosequencing was used to measure methylation status of candidate DMCs in the validation group. Median survival times (MST) were analyzed using Kaplan-Meier (log-rank) product limit method. RESULTS DREAM analyzed 101 576 CpG sites. Hierarchical clustering of 16 262 CpG sites in test group identified group with better prognosis (MST = 55-477 days vs 10-301 days, P = .007). Volcano plot identified 1371 differentially methylated CpG sites (DMCs). DMC near the genes of FAM213A (DMC-F) and PHLPP1 (DMC-P) were selected as candidates. Bisulfite-pyrosequencing performed on validation group showed group with methylation level of DMC-F < 40% had favorable prognosis (MST = 11-1072 days vs 8-1792 days, P = .01), whereas group with the methylation level combination of DMC-F < 40% plus DMC-P < 10% had excellent prognosis (MST = 18-1072 days vs 8-1792 days, P = .009). CONCLUSION AND CLINICAL IMPORTANCE Methylation status of prognostic CpG sites delineate canine MGHL cases with longer MST, providing owners with information on expectations of potential improved treatment outcomes.
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Affiliation(s)
- Yong Bin Teoh
- Translational Research Unit, Veterinary Teaching Hospital, Graduate School of Veterinary MedicineHokkaido UniversitySapporoHokkaidoJapan
- One Health Research CenterHokkaido UniversitySapporoHokkaidoJapan
| | | | | | - Shoko Yokoyama
- Translational Research Unit, Veterinary Teaching Hospital, Graduate School of Veterinary MedicineHokkaido UniversitySapporoHokkaidoJapan
- One Health Research CenterHokkaido UniversitySapporoHokkaidoJapan
| | | | | | - Hirotaka Tomiyasu
- Laboratory of Veterinary Internal MedicineUniversity of TokyoTokyoJapan
| | - Hajime Tsujimoto
- Japan Animal Referral Medical Center (JARMeC)KawasakiKanagawaJapan
| | - Mitsuyoshi Takiguchi
- One Health Research CenterHokkaido UniversitySapporoHokkaidoJapan
- Laboratory of Veterinary Internal MedicineHokkaido UniversitySapporoHokkaidoJapan
| | - Jumpei Yamazaki
- Translational Research Unit, Veterinary Teaching Hospital, Graduate School of Veterinary MedicineHokkaido UniversitySapporoHokkaidoJapan
- One Health Research CenterHokkaido UniversitySapporoHokkaidoJapan
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Han W, Song Z, Shan D, Shi Q. Fetal origins of obesity: a novel pathway of regulating appetite neurons in the hypothalamus of growth-restricted rat offspring. Arch Gynecol Obstet 2023:10.1007/s00404-023-07108-3. [PMID: 37378669 DOI: 10.1007/s00404-023-07108-3] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 06/11/2023] [Indexed: 06/29/2023]
Abstract
PURPOSE Fetal growth restriction causes a series of sequelae, some of which, such as hyperphagia, reduced satiety and postnatal obesity, are believed to be associated with embryonic hypothalamic neurons impairment. The mechanisms underlying the linkage of fetal brain injuries to break the energy homeostasis have not been elucidated completely. Here, we aim to investigate the effect of intrauterine energy restriction on remodeling appetite neurons in the hypothalamus of fetal and postnatal infant rats. METHODS Low-protein (8%) diet combined with 75% energy restriction was used to establish an animal model. Rats offspring brain tissues, harvested from embryo day 18 and postnatal infant day 1, were sampled for dependent regulator analyses and master neuron assessment. RESULTS Growth-restricted rats showed the increased expression of Bsx and NPY in the hypothalamus as well as remodeling hypothalamic neurons differentiation compared to controls. Intriguingly, in cells cultured in vitro test, we found that activated effects of Bsx and NPY could be exacerbated by DNMT1 inhibitor. CONCLUSIONS In embryonic and early postnatal stage of FGR rats, we detected high concentrations of orexigenic neurons in the hypothalamus. DNMT1 activity is correlated with early embryonic neurogenesis by mediating the expression of Bsx and NPY. It may be one of the reasons for the abnormal development of the appetite regulation pathway and higher susceptibility to obesity in FGR offspring.
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Affiliation(s)
- Weiling Han
- Department of Obstetrics, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing Maternal and Child Health Care Hospital, No. 251 Yao Jia Yuan Road, Chao Yang District, Beijing, 100026, China
| | - Zhaoyi Song
- STI-Zhilian Research Institute for Innovation and Digital Health, Beijing, China
| | - Dan Shan
- Department of Obstetrics, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing Maternal and Child Health Care Hospital, No. 251 Yao Jia Yuan Road, Chao Yang District, Beijing, 100026, China
- Department of Obstetrics and Gynecology, The People's Hospital of Yongcheng, Dongcheng District, Yongcheng City, Henan Province, China
| | - Qingyun Shi
- Department of Obstetrics, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing Maternal and Child Health Care Hospital, No. 251 Yao Jia Yuan Road, Chao Yang District, Beijing, 100026, China.
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Ziarniak K, Yang T, Boycott C, Beetch M, Sassek M, Grzeda E, Ma Y, Sliwowska JH, Stefanska B. DNA hypermethylation of Kiss1r promoter and reduction of hepatic Kiss1r in female rats with type 2 diabetes. Epigenetics 2022; 17:2332-2346. [PMID: 36094166 PMCID: PMC9665141 DOI: 10.1080/15592294.2022.2119120] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Kisspeptin, produced from the brain and peripheral tissues, may constitute an important link in metabolic regulation in response to external cues, such as diet. The kisspeptin system is well described in the brain. However, its function and regulation in the peripheral tissues, especially in relation to metabolic disease and sex differences, remain to be elucidated. As Kiss1 and Kiss1r, encoding for kisspeptin and kisspeptin receptors, respectively, are altered by overnutrition/fasting and regulated by DNA methylation during puberty and cancer, epigenetic mechanisms in metabolic disorders are highly probable. In the present study, we experimentally induced type 2 diabetes mellitus (DM2) in female Wistar rats using high-fat diet/streptozocin. We analysed expression and DNA methylation of Kiss1 and Kiss1r in the peripheral tissues, using quantitative-reverse-transcription PCR (qRT-PCR) and pyrosequencing. We discovered differential expression of Kiss1 and Kiss1r in peripheral organs in DM2 females, as compared with healthy controls, and the profile differed from patterns reported earlier in males. DM2 in females was linked to the increased Kiss1 mRNA in the liver and increased Kiss1r mRNA in the liver and adipose tissue. However, Kiss1r promoter was hypermethylated in the liver, suggesting gene silencing. Indeed, the increase in DNA methylation of Kiss1r promoter was accompanied by a reduction in Kiss1r protein, implying epigenetic or translational gene repression. Our results deliver novel evidence for tissue-specific differences in Kiss1 and Kiss1r expression in peripheral organs in DM2 females and suggest DNA methylation as a player in regulation of the hepatic kisspeptin system in DM2.
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Affiliation(s)
- Kamil Ziarniak
- Laboratory of Neurobiology, Department of Zoology, Faculty of Veterinary Medicine and Animal Sciences, Poznan University of Life Sciences, Poznan, Poland.,Molecular and Cell Biology Unit, Poznan University of Medical Sciences, Poznan, Poland
| | - Tony Yang
- Food, Nutrition and Health Program, Faculty of Land and Food Systems, the University of British Columbia, Vancouver, BC, Canada
| | - Cayla Boycott
- Food, Nutrition and Health Program, Faculty of Land and Food Systems, the University of British Columbia, Vancouver, BC, Canada
| | - Megan Beetch
- Food, Nutrition and Health Program, Faculty of Land and Food Systems, the University of British Columbia, Vancouver, BC, Canada
| | - Maciej Sassek
- Department of Animal Physiology, Biochemistry and Biostructure, Poznan University of Life Sciences, Poznan, Poland
| | - Emilia Grzeda
- Laboratory of Neurobiology, Department of Zoology, Faculty of Veterinary Medicine and Animal Sciences, Poznan University of Life Sciences, Poznan, Poland
| | - Yuexi Ma
- Food, Nutrition and Health Program, Faculty of Land and Food Systems, the University of British Columbia, Vancouver, BC, Canada
| | - Joanna H Sliwowska
- Laboratory of Neurobiology, Department of Zoology, Faculty of Veterinary Medicine and Animal Sciences, Poznan University of Life Sciences, Poznan, Poland
| | - Barbara Stefanska
- Food, Nutrition and Health Program, Faculty of Land and Food Systems, the University of British Columbia, Vancouver, BC, Canada
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