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Yu Y, Xu Z, Zhou H, Xu R, Xu J, Liu W, Wu Y, Qiu Y, Zhang G, Huang X, Chen Y. RBP7 functions as a tumor suppressor in HR + breast cancer by inhibiting the AKT/SREBP1 pathway and reducing fatty acid. Cancer Cell Int 2024; 24:118. [PMID: 38553715 PMCID: PMC10979609 DOI: 10.1186/s12935-024-03299-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 03/08/2024] [Indexed: 04/02/2024] Open
Abstract
BACKGROUND Increasing evidence proves that RBP7 plays a significant role in breast cancer (BC). The present study was aimed to investigate the mechanism of RBP7. METHODS Western Blotting and qRT-PCR were performed for evaluating the expression levels. CCK8, colony forming, xenograft mouse model, wound healing and transwell assays were conducted to examine cell ability of proliferation, invasion and migration. Nile red staining and Oil red O staining were used for testing the lipid. RESULTS RBP7 was related to overall survival (OS) in patients with HR + BC. RBP7 protein was significantly decreased in HR + BC tissues and cells. RBP7 suppressed HR + BC cell proliferation in vitro and in vivo, and inhibited migration and invasion. RBP7 reduced fatty acid in HR + BC cells by inhibiting the AKT/SREBP1 pathway. CONCLUSIONS RBP7 may function as a tumor suppressor in HR + BC by inhibiting the AKT/SREBP1 pathway and reducing fatty acid.
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Affiliation(s)
- Yue Yu
- Department of General Surgery, The First Affiliated Hospital of Soochow University, NO. 899, Pinghai Road, Suzhou, 215006, China
| | - Zhihua Xu
- Department of General Surgery, The First Affiliated Hospital of Soochow University, NO. 899, Pinghai Road, Suzhou, 215006, China
| | - Hao Zhou
- Department of General Surgery, The First Affiliated Hospital of Soochow University, NO. 899, Pinghai Road, Suzhou, 215006, China
| | - Ruyan Xu
- Jiangsu Institute of Clinical Immunology, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Jia Xu
- Jiangsu Institute of Clinical Immunology, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Wenjun Liu
- Jiangsu Institute of Clinical Immunology, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Yuxin Wu
- Department of General Surgery, The First Affiliated Hospital of Soochow University, NO. 899, Pinghai Road, Suzhou, 215006, China
| | - Yue Qiu
- Department of General Surgery, The First Affiliated Hospital of Soochow University, NO. 899, Pinghai Road, Suzhou, 215006, China
| | - Guangbo Zhang
- Jiangsu Institute of Clinical Immunology, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Xue Huang
- Jiangsu Institute of Clinical Immunology, The First Affiliated Hospital of Soochow University, Suzhou, China.
| | - Yan Chen
- Department of General Surgery, The First Affiliated Hospital of Soochow University, NO. 899, Pinghai Road, Suzhou, 215006, China.
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Gu S, Gong Z, Liu S, Lu G, Ling Y, Wei Y, Li T, Gu R, Rong Y, Li J, Li H. Global Single-Cell Sequencing Landscape of Adipose Tissue of Different Anatomical Site Origin in Humans. Stem Cells Int 2023; 2023:8282961. [PMID: 37197688 PMCID: PMC10185425 DOI: 10.1155/2023/8282961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 11/28/2022] [Accepted: 03/20/2023] [Indexed: 05/19/2023] Open
Abstract
Chronic refractory wounds (CRW) are one of the most serious clinical challenges for surgeons to address. Stromal vascular fraction gels (SVFG), including human adipose stem cells (hASCs), have excellent vascular regenerative and tissue repair properties. Here, we combined single-cell RNA sequencing (scRNA-seq) of leg subcutaneous adipose tissue samples with scRNA-seq data from abdominal subcutaneous adipose tissue, leg subcutaneous adipose tissue, and visceral adipose tissue samples from public databases. The results showed specific differences in cellular levels in adipose tissue from different anatomical site sources. We identified cells including CD4+ T cells, hASCs, adipocyte (APC), epithelial (Ep) cells, and preadipocyte. In particular, the dynamics between groups of hASCs, epithelial cells, APCs, and precursor cells in adipose tissue of different anatomical site origins were more significant. Furthermore, our analysis reveals alterations at the cellular level and molecular level, as well as the biological signaling pathways involved in these subpopulations of cells with specific alterations. In particular, certain subpopulations of hASCs have higher cell stemness, which may be related to lipogenic differentiation capacity and may be beneficial in promoting CRW treatment and healing. In general, our study captures a human single-cell transcriptome profile across adipose depots, the cell type identification and analysis of which may help dissect the function and role of cells with specific alterations present in adipose tissue and may provide new ideas and approaches for the treatment of CRW in the clinical setting.
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Affiliation(s)
- Shixing Gu
- Department of Plastic and Aesthetic Surgery, The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, 533022 Guangxi, China
| | - Zhenyu Gong
- Department of Burn, Plastic and Aesthetic Surgery, Affiliated Hospital of Guilin Medical University, Guilin, 541001 Guangxi, China
| | - Shuncai Liu
- Department of Burn, Plastic and Aesthetic Surgery, Affiliated Hospital of Guilin Medical University, Guilin, 541001 Guangxi, China
| | - Guohao Lu
- Department of Emergency, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 53002, China
| | - Yu Ling
- Department of Emergency, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 53002, China
| | - Yanlin Wei
- Department of Emergency, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi 53002, China
| | - Ting Li
- Department of Basic Science, YuanDong International Academy of Life Sciences, Hong Kong 999077, China
| | - Ronghe Gu
- Department of Orthopedics, The Fifth Affiliated Hospital of Guangxi Medical University & The First People's Hospital of Nanning, Nanning, 53002 Guangxi, China
| | - Yongxian Rong
- Department of Burn, Plastic and Aesthetic Surgery, The Guiping People's Hospital, Guigping, 537200, China
| | - Junjun Li
- Department of Pediatrics, The People's Hospital of Guangxi Zhuang Autonomous Region & Institute of Hospital Management and Medical Prevention Collaborative Innovation, Guangxi Academy of Medical Sciences, Nanning, 530021 Guangxi, China
| | - Hongmian Li
- Department of Plastic and Reconstructive Surgery, The People's Hospital of Guangxi Zhuang Autonomous Region & Research Center of Medical Sciences, Guangxi Academy of Medical Sciences, Nanning, 530021 Guangxi, China
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Methylation-Mediated Silencing of RBP7 Promotes Breast Cancer Progression through PPAR and PI3K/AKT Pathway. JOURNAL OF ONCOLOGY 2022; 2022:9039110. [PMID: 36276273 PMCID: PMC9584705 DOI: 10.1155/2022/9039110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 07/06/2022] [Accepted: 09/26/2022] [Indexed: 11/17/2022]
Abstract
Retinoid-binding protein7 (RBP7) is a member of the cellular retinol-binding protein (CRBP) family, which is involved in the pathogenesis of breast cancer. The study aims to illustrate the prognostic value and the potential regulatory mechanisms of RBP7 expression in breast cancer. Bioinformatics analysis with the TCGA and CPTAC databases revealed that the mRNA and protein expression levels of RBP7 in normal were higher compared to breast cancer tissues. Survival analysis displayed that the lower expression of RBP7, the worse the prognosis in ER-positive (ER+) breast cancer patients. Genomic analysis showed that low expression of RBP7 correlates with its promoter hypermethylation in breast cancer. Functional enrichment analysis demonstrated that downregulation of RBP7 expression may exert its biological influence on breast cancer through the PPAR pathway and the PI3K/AKT pathway. In summary, we identified RBP7 as a novel biomarker that is helpful for the prognosis of ER+ breast cancer patients. Promoter methylation of RBP7 is involved in its gene silencing in breast cancer, thus regulating the occurrence and development of ER+ breast cancer through the PPAR and PI3K/AKT pathways.
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Ahn J, Kim DH, Park MR, Suh Y, Lee H, Hwang S, Mamuad LL, Lee SS, Lee K. A novel testis-enriched gene, Samd4a, regulates spermatogenesis as a spermatid-specific factor. Front Cell Dev Biol 2022; 10:978343. [PMID: 36274854 PMCID: PMC9579339 DOI: 10.3389/fcell.2022.978343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Accepted: 09/20/2022] [Indexed: 11/13/2022] Open
Abstract
Spermatogenesis is the highly orchestrated process involving expression of a series of testicular genes. Testis-enriched genes are critical for cellular processes during spermatogenesis whose disruption leads to impaired spermatogenesis and male infertility. Nevertheless, among poorly investigated testicular genes are the mouse Samd4a and human SAMD4A which were identified in the current study as novel testis-enriched genes through transcriptomic analyses. In particular, as orthologous alternative splicing isoforms, mouse Samd4a E-form and human SAMD4AC-form containing the SAM domain were specific to testes. Western blot analyses revealed that the murine SAMD4AE-form was predominantly found in the testis. Analyses on GEO2R and single-cell RNA-seq datasets revealed that the Samd4a/SAMD4A expression was enriched in spermatids among various types of cells in adult testes. To investigate in vivo functions of Samd4a, Samd4a knockout mice were generated using the CRISPR/Cas9 system. The Samd4a deficiency resulted in lower testis weight, absence of elongated spermatids, and an increased number of apoptotic cells. Profiling of gene expression in human testis samples revealed that the SAMD4A expression was comparable between obstructive azoospermia patients and normal controls, but significantly lowered in nonobstructive azoospermia (NOA) patients. Among three subgroups of NOA, pre-meiotic arrest (NOA-pre), meiotic arrest (NOA-mei), and post-meiotic arrest (NOA-post), expression level of SAMD4A was higher in the NOA-post than the NOA-mei, but there was no difference between the NOA-pre and NOA-mei. The current studies demonstrated spermatid stage-specific expression of Samd4a/SAMD4A, and impairment of the late stages of spermatogenesis by disruption of the mouse Samd4a gene. These data suggest that Samd4a/SAMD4A plays an essential role in normal spermatogenesis, and SAMD4A, as a spermatid specific marker, can be used for subcategorizing NOA patients. Further understanding the molecular role of SAMD4A will advance our knowledge on genetic regulations in male infertility.
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Affiliation(s)
- Jinsoo Ahn
- Department of Animal Sciences, The Ohio State University, Columbus, OH, United States
| | - Dong-Hwan Kim
- Department of Animal Sciences, The Ohio State University, Columbus, OH, United States
| | - Mi-Ryung Park
- Animal Biotechnology Division, National Institute of Animal Science, Wanju, South Korea
| | - Yeunsu Suh
- Department of Animal Sciences, The Ohio State University, Columbus, OH, United States
| | - Haesun Lee
- Animal Biotechnology Division, National Institute of Animal Science, Wanju, South Korea
| | - Seongsoo Hwang
- Animal Biotechnology Division, National Institute of Animal Science, Wanju, South Korea
| | - Lovelia L. Mamuad
- Department of Animal Science and Technology, Sunchon National University, Suncheon, South Korea
| | - Sang Suk Lee
- Department of Animal Science and Technology, Sunchon National University, Suncheon, South Korea
- *Correspondence: Sang Suk Lee, ; Kichoon Lee,
| | - Kichoon Lee
- Department of Animal Sciences, The Ohio State University, Columbus, OH, United States
- *Correspondence: Sang Suk Lee, ; Kichoon Lee,
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Huang X, Ke K, Jin W, Zhu Q, Zhu Q, Mei R, Zhang R, Yu S, Shou L, Sun X, Feng J, Duan T, Mou Y, Xie T, Wu Q, Sui X. Identification of Genes Related to 5-Fluorouracil Based Chemotherapy for Colorectal Cancer. Front Immunol 2022; 13:887048. [PMID: 35784334 PMCID: PMC9247273 DOI: 10.3389/fimmu.2022.887048] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 05/16/2022] [Indexed: 12/22/2022] Open
Abstract
Background Colorectal cancer (CRC) is one of the most common malignancies and its incidence and mortality are increasing yearly. 5-Fluorouracil (5-FU) has long been used as a standard first-line treatment for CRC patients. Although 5-FU-based chemotherapy is effective for advanced CRC, the consequent resistance remains a key problem and causes the poor prognosis of CRC patients. Thus, there is an urgent need to identify new biomarkers to predict the response to 5-FU-based chemotherapy. Methods CRC samples were retrieved from Gene Expression Omnibus (GEO) and The Cancer Genome Atlas (TCGA). The immune-related genes were retrieved from the ImmPort database. Single-cell sequencing results from colorectal cancer were obtained by the ArrayExpress database. 5-FU resistance-related genes were filtered and validated by R packages. ESTIMATE algorithms were used to assess the tumor microenvironment (TME). KEGG and GO analysis were performed to explore the biological signaling pathway for resistant-response patients and sensitive-response patients in the tumor microenvironment. pRRophetic algorithms were used to predict 5-FU sensitivity. GSEA and GSVA analysis was performed to excavate the biological signaling pathway of the RBP7 gene. Results Nine immune-related genes were identified to be associated with 5-FU resistance and poor disease-free survival (DFS) of CRC patients and the signature of these genes was developed in a DFS-prognostic model. Four immune-related genes were determined to be associated with 5-FU resistance and overall survival (OS) of CRC patients. The signature of these genes was developed an OS-prognostic model. ESTIMATE scores showed a significant difference between 5-FU resistant and 5-FU sensitive CRC patients. Resistant-response patients and sensitive-response patients to 5-FU based chemotherapy showed different GO and KEGG enrichment on the tumor microenvironment. RBP7, as a tumor immune microenvironment (TIME) related gene, was found to have the potential of predicting chemotherapy resistance and poor prognosis of CRC patients. GSEA analysis showed multiple signaling differences between the high and low expression of RBP7 in CRC patients. Hypoxia and TNFα signaling via NFκB gene sets were significantly different between chemotherapy resistant (RBP7High) and chemotherapy sensitive (RBP7Low) patients. Single-cell RNA-seq suggested RBP7 was centrally distributed in endothelial stalk cells, endothelial tip cells, and myeloid cells. Conclusions Immune-related genes will hopefully be potential prognostic biomarkers to predict chemotherapy resistance for CRC. RBP7 may function as a tumor microenvironment regulator to induce 5-FU resistance, thereby affecting the prognosis of CRC patients.
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Affiliation(s)
- Xingxing Huang
- State Key Laboratory of Quality Research in Chinese Medicines, Faculty of Chinese Medicine, Macau University of Science and Technology, Macau, Macau SAR, China
- School of Pharmacy and Department of Medical Oncology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou Normal University, Hangzhou, China
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, China
| | - Kun Ke
- Department of Gastrointestinal-Pancreatic Surgery, Zhejiang Provincial People’s Hospital, People’s Hospital of Hangzhou Medical College, Hangzhou, China
| | - Weiwei Jin
- Department of Gastrointestinal-Pancreatic Surgery, Zhejiang Provincial People’s Hospital, People’s Hospital of Hangzhou Medical College, Hangzhou, China
| | - Qianru Zhu
- State Key Laboratory of Quality Research in Chinese Medicines, Faculty of Chinese Medicine, Macau University of Science and Technology, Macau, Macau SAR, China
- School of Pharmacy and Department of Medical Oncology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou Normal University, Hangzhou, China
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, China
| | - Qicong Zhu
- Department of Gastrointestinal-Pancreatic Surgery, Zhejiang Provincial People’s Hospital, People’s Hospital of Hangzhou Medical College, Hangzhou, China
| | - Ruyi Mei
- School of Pharmacy and Department of Medical Oncology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou Normal University, Hangzhou, China
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, China
| | - Ruonan Zhang
- State Key Laboratory of Quality Research in Chinese Medicines, Faculty of Chinese Medicine, Macau University of Science and Technology, Macau, Macau SAR, China
- School of Pharmacy and Department of Medical Oncology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou Normal University, Hangzhou, China
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, China
| | - Shuxian Yu
- School of Pharmacy and Department of Medical Oncology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou Normal University, Hangzhou, China
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, China
| | - Lan Shou
- School of Pharmacy and Department of Medical Oncology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou Normal University, Hangzhou, China
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, China
| | - Xueni Sun
- School of Pharmacy and Department of Medical Oncology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou Normal University, Hangzhou, China
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, China
| | - Jiao Feng
- School of Pharmacy and Department of Medical Oncology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou Normal University, Hangzhou, China
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, China
| | - Ting Duan
- School of Pharmacy and Department of Medical Oncology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou Normal University, Hangzhou, China
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, China
| | - Yiping Mou
- Department of Gastrointestinal-Pancreatic Surgery, Zhejiang Provincial People’s Hospital, People’s Hospital of Hangzhou Medical College, Hangzhou, China
- *Correspondence: Yiping Mou, ; Tian Xie, ; Qibiao Wu, ; Xinbing Sui,
| | - Tian Xie
- State Key Laboratory of Quality Research in Chinese Medicines, Faculty of Chinese Medicine, Macau University of Science and Technology, Macau, Macau SAR, China
- School of Pharmacy and Department of Medical Oncology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou Normal University, Hangzhou, China
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, China
- *Correspondence: Yiping Mou, ; Tian Xie, ; Qibiao Wu, ; Xinbing Sui,
| | - Qibiao Wu
- State Key Laboratory of Quality Research in Chinese Medicines, Faculty of Chinese Medicine, Macau University of Science and Technology, Macau, Macau SAR, China
- School of Pharmacy and Department of Medical Oncology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou Normal University, Hangzhou, China
- Guangdong-Hong Kong-Macau Joint Laboratory for Contaminants Exposure and Health, Guangzhou, China
- *Correspondence: Yiping Mou, ; Tian Xie, ; Qibiao Wu, ; Xinbing Sui,
| | - Xinbing Sui
- State Key Laboratory of Quality Research in Chinese Medicines, Faculty of Chinese Medicine, Macau University of Science and Technology, Macau, Macau SAR, China
- School of Pharmacy and Department of Medical Oncology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou Normal University, Hangzhou, China
- Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines, Engineering Laboratory of Development and Application of Traditional Chinese Medicines, Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, China
- *Correspondence: Yiping Mou, ; Tian Xie, ; Qibiao Wu, ; Xinbing Sui,
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Kim DH, Ahn J, Suh Y, Ziouzenkova O, Lee JW, Lee K. Retinol Binding Protein 7 Promotes Adipogenesis in vitro and Regulates Expression of Genes Involved in Retinol Metabolism. Front Cell Dev Biol 2022; 10:876031. [PMID: 35493071 PMCID: PMC9047791 DOI: 10.3389/fcell.2022.876031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 03/30/2022] [Indexed: 11/22/2022] Open
Abstract
Retinol is an essential nutrient in animals. Its metabolites, specifically retinoic acid (RA), are crucial for cell differentiation, including adipogenesis. Retinol binding protein 7 (Rbp7) is under the control of PPARγ, the master regulator of adipogenesis. However, the role of RBP7 in adipogenesis is unclear. Our study showed that Rbp7 was abundantly expressed in white and brown mouse adipose tissues and had a higher expression in adipocytes than in stromal vascular fraction. Rbp7 overexpression promoted 3T3-L1 preadipocyte differentiation with increased triglyceride accumulation and up-regulation of Pparγ, Fabp4, C/ebpα, and AdipoQ. Rbp7 deficient adipocytes had opposite effects of the overexpression, which were rescued by RA supplementation. Indirect assessment of relative nuclear RA levels using RAR response element (RARE)-Luc reporter assay demonstrated that Rbp7 overexpression significantly increased RARE-Luc reporter activity. Rbp7 overexpression significantly increased expression of Raldh1, responsible for RA production, and up-regulation of Lrat and Cyp26a1, involved in retinol storage and RA catabolism, respectively, in 3T3-L1 adipocytes. Rbp7 deficient adipocytes had opposite effects of the overexpression of those genes involved in retinol metabolism. These data suggest that RBP7 increases transcriptional activity of RARE that may induce negative feedback responses via regulation of the gene expression for retinol homeostasis. Our data indicate critical RBP7 functions in adipocytes: regulation of transcriptional activity of RARE and adipocytes differentiation, potentially providing a new target for obesity therapy.
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Affiliation(s)
- Dong-Hwan Kim
- Biotherapeutics Translational Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, South Korea
- Department of Functional Genomics, University of Science and Technology, Daejeon, South Korea
- Department of Animal Sciences, The Ohio State University, Columbus, OH, United States
| | - Jinsoo Ahn
- Department of Animal Sciences, The Ohio State University, Columbus, OH, United States
| | - Yeunsu Suh
- Department of Animal Sciences, The Ohio State University, Columbus, OH, United States
| | - Ouliana Ziouzenkova
- Department of Human Sciences, The Ohio State University, Columbus, OH, United States
| | - Jeong-Woong Lee
- Biotherapeutics Translational Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, South Korea
- Department of Functional Genomics, University of Science and Technology, Daejeon, South Korea
- *Correspondence: Jeong-Woong Lee, ; Kichoon Lee,
| | - Kichoon Lee
- Department of Animal Sciences, The Ohio State University, Columbus, OH, United States
- The Ohio State University Interdisciplinary Human Nutrition Program, The Ohio State University, Columbus, OH, United States
- *Correspondence: Jeong-Woong Lee, ; Kichoon Lee,
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Kim D, Lee J, Suh Y, Cressman M, Lee SS, Lee K. Adipogenic and Myogenic Potentials of Chicken Embryonic Fibroblasts
in vitro
: Combination of Fatty Acids and Insulin Induces Adipogenesis. Lipids 2020; 55:163-171. [DOI: 10.1002/lipd.12220] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 01/23/2020] [Accepted: 01/24/2020] [Indexed: 12/22/2022]
Affiliation(s)
- Dong‐Hwan Kim
- Department of Animal SciencesThe Ohio State University Columbus OH 43210 USA
| | - Joonbum Lee
- Department of Animal SciencesThe Ohio State University Columbus OH 43210 USA
- Interdisciplinary Ph.D. Program in NutritionThe Ohio State University Columbus OH 43210 USA
| | - Yeunsoo Suh
- Department of Animal SciencesThe Ohio State University Columbus OH 43210 USA
| | - Michael Cressman
- Department of Animal SciencesThe Ohio State University Columbus OH 43210 USA
| | - Sang Suk Lee
- Department of Animal Science and TechnologySunchon National University Jeonnam 57922 South Korea
| | - Kichoon Lee
- Department of Animal SciencesThe Ohio State University Columbus OH 43210 USA
- Interdisciplinary Ph.D. Program in NutritionThe Ohio State University Columbus OH 43210 USA
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Ahn J, Suh Y, Lee K. Adipose-Specific Expression, Developmental and Nutritional Regulation of the Gene-Encoding Retinol-Binding Protein 7 in Pigs. Lipids 2019; 54:359-367. [PMID: 31218688 DOI: 10.1002/lipd.12170] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 05/20/2019] [Accepted: 05/20/2019] [Indexed: 11/09/2022]
Abstract
Modulation of expression of adipose tissue-specific transcripts has been known to regulate adipogenesis and lipid metabolism. Recently, adipose-specific expression patterns and developmental regulation of the gene-encoding retinol-binding protein 7 (RBP7) was identified. However, its expression in adipose tissue of the porcine species has yet to be explored. In this study, adipose tissue-specific expression of porcine RBP7 was identified and conservation of the fatty acid-binding domains and evolutionary relationship of the RBP7 gene were verified comparatively across mammalian species. Our in vitro and in vivo analysis of gene expression revealed that RBP7 expression was significantly high in fat cell fraction compared to stromal vascular cells (p < 0.05) and increased during development (p < 0.05). The level of RBP7 expression was upregulated during a 24-h short-term fasting intervention and restored 6 h after refeeding (p < 0.05). Taken together, these studies provide insights into the role of RBP7 in adipose tissue of pigs during development and nutritional intervention and pave the way for future studies on the regulation of retinol homeostasis in porcine adipose tissue.
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Affiliation(s)
- Jinsoo Ahn
- Department of Animal Sciences, The Ohio State University, Columbus, OH, 43210, USA
| | - Yeunsu Suh
- Department of Animal Sciences, The Ohio State University, Columbus, OH, 43210, USA
| | - Kichoon Lee
- Department of Animal Sciences, The Ohio State University, Columbus, OH, 43210, USA
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