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Lin TC, Tsai CH, Shiau CK, Huang JH, Tsai HK. Predicting splicing patterns from the transcription factor binding sites in the promoter with deep learning. BMC Genomics 2024; 25:830. [PMID: 39227799 PMCID: PMC11373144 DOI: 10.1186/s12864-024-10667-7] [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: 10/30/2022] [Accepted: 07/25/2024] [Indexed: 09/05/2024] Open
Abstract
BACKGROUND Alternative splicing is a pivotal mechanism of post-transcriptional modification that contributes to the transcriptome plasticity and proteome diversity in metazoan cells. Although many splicing regulations around the exon/intron regions are known, the relationship between promoter-bound transcription factors and the downstream alternative splicing largely remains unexplored. RESULTS In this study, we present computational approaches to unravel the regulatory relationship between promoter-bound transcription factor binding sites (TFBSs) and the splicing patterns. We curated a fine dataset that includes DNase I hypersensitive site sequencing and transcriptomes across fifteen human tissues from ENCODE. Specifically, we proposed different representations of TF binding context and splicing patterns to examine the associations between the promoter and downstream splicing events. While machine learning models demonstrated potential in predicting splicing patterns based on TFBS occupancies, the limitations in the generalization of predicting the splicing forms of singleton genes across diverse tissues was observed with carefully examination using different cross-validation methods. We further investigated the association between alterations in individual TFBS at promoters and shifts in exon splicing efficiency. Our results demonstrate that the convolutional neural network (CNN) models, trained on TF binding changes in the promoters, can predict the changes in splicing patterns. Furthermore, a systemic in silico substitutions analysis on the CNN models highlighted several potential splicing regulators. Notably, using empirical validation using K562 CTCFL shRNA knock-down data, we showed the significant role of CTCFL in splicing regulation. CONCLUSION In conclusion, our finding highlights the potential role of promoter-bound TFBSs in influencing the regulation of downstream splicing patterns and provides insights for discovering alternative splicing regulations.
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Affiliation(s)
- Tzu-Chieh Lin
- Institute of Information Science, Academia Sinica, Taipei, 11529, Taiwan
| | - Cheng-Hung Tsai
- Institute of Information Science, Academia Sinica, Taipei, 11529, Taiwan
| | - Cheng-Kai Shiau
- Institute of Information Science, Academia Sinica, Taipei, 11529, Taiwan
| | - Jia-Hsin Huang
- Institute of Information Science, Academia Sinica, Taipei, 11529, Taiwan.
- Taiwan AI Labs & Foundation, Taipei, 10351, Taiwan.
| | - Huai-Kuang Tsai
- Institute of Information Science, Academia Sinica, Taipei, 11529, Taiwan.
- Taiwan AI Labs & Foundation, Taipei, 10351, Taiwan.
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Wu HY, Ji ZH, Xie WY, Guo HX, Zheng Y, Gao W, Yuan B. KLF4 promotes milk fat synthesis by regulating the PI3K-AKT-mTOR pathway and targeting FASN activation in bovine mammary epithelial cells. iScience 2024; 27:109850. [PMID: 38779481 PMCID: PMC11108978 DOI: 10.1016/j.isci.2024.109850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 03/18/2024] [Accepted: 04/26/2024] [Indexed: 05/25/2024] Open
Abstract
Milk fat is an important indicator for evaluating the quality of cow's milk. In this study, we used bovine mammary epithelial cells (BMECs) to investigate the role and molecular mechanism of KLF4 in the regulation of milk fat synthesis. The results showed that KLF4 was more highly expressed in mammary tissues of high-fat cows compared with low-fat cows. KLF4 positively regulated the expression of genes related to milk fat synthesis in BMECs, increasing intracellular triglycerides content, and KLF4 promoted milk fat synthesis by activating the PI3K-AKT-mTOR signaling pathway. Furthermore, the results of animal experiments also confirmed that knockdown of KLF4 inhibited milk fat synthesis. In addition, yeast one-hybrid assays and dual-luciferase reporter gene assays confirmed that KLF4 directly targets and binds to the fatty acid synthase (FASN) promoter region to promote FASN transcription. These results demonstrate that KLF4 is a key transcription factor for milk fat synthesis in BMECs.
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Affiliation(s)
- Hong-Yu Wu
- Department of Laboratory Animals, College of Animal Sciences, Jilin University, Changchun, Jilin 130062, China
- Jilin Academy of Agricultural Sciences, Jilin 132101, China
| | - Zhong-Hao Ji
- Department of Laboratory Animals, College of Animal Sciences, Jilin University, Changchun, Jilin 130062, China
- Department of Basic Medicine, Changzhi Medical College, Changzhi 046000, Shanxi, China
| | - Wen-Yin Xie
- Department of Laboratory Animals, College of Animal Sciences, Jilin University, Changchun, Jilin 130062, China
| | - Hai-Xiang Guo
- Department of Laboratory Animals, College of Animal Sciences, Jilin University, Changchun, Jilin 130062, China
| | - Yi Zheng
- Department of Laboratory Animals, College of Animal Sciences, Jilin University, Changchun, Jilin 130062, China
| | - Wei Gao
- Department of Laboratory Animals, College of Animal Sciences, Jilin University, Changchun, Jilin 130062, China
| | - Bao Yuan
- Department of Laboratory Animals, College of Animal Sciences, Jilin University, Changchun, Jilin 130062, China
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Mao X, Li Y, Zhong Y, Chen R, Wang K, Huang D, Luo X. Kruppel-like factor 14 ameliorated obesity and related metabolic disorders by promoting adipose tissue browning. Am J Physiol Endocrinol Metab 2023; 325:E744-E754. [PMID: 37938176 DOI: 10.1152/ajpendo.00226.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 11/03/2023] [Accepted: 11/04/2023] [Indexed: 11/09/2023]
Abstract
Obesity has been identified as a serious and debilitating disease that threatens human health, but the current treatment strategies still have some shortcomings. Exercise and dieting are difficult for many people to adhere to, and a series of surgical risks and pain brought about by volume reduction have made it difficult for the current weight loss effect to meet human expectations. In this study, we first found that mice with overexpression of the transcription factor Kruppel-like factor 14 (KLF14) in subcutaneous adipose tissue gained weight more slowly while consuming a high-fat diet than did control mice, and these mice also showed reduced insulin resistance and liver lipid deposition abnormalities. Mechanistically, the browning of white adipose tissue was promoted in adipose tissue with KLF14 overexpression; therefore, we preliminarily concluded that KLF14 can improve obesity by promoting the browning of white adipose tissue and energy consumption, thus ameliorating obesity and related metabolic disturbances. In summary, our results revealed that KLF14 may promote white adipose tissue browning, thus ameliorating high-fat diet-induced obesity and hepatic steatosis, as well as serum lipid levels and insulin resistance, thereby achieving a positive effect on metabolism.NEW & NOTEWORTHY Our study first explored the role of KLF14 in the development and progression of HFD-induced obesity in male mice. Its beneficial effect on adipose browning and metabolic disorders suggests that KLF14 may provide us a new therapeutic strategy for obesity and related metabolic complications. This health problem is of global concern and needs to be addressed.
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Affiliation(s)
- Xiaoxiang Mao
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
- Clinic Center of Human Gene Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Yuanxiang Li
- Department of Oncology, Hubei Cancer Hospital, TongJi Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Yi Zhong
- Clinic Center of Human Gene Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Ru Chen
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
- Clinic Center of Human Gene Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Kun Wang
- Department of Geriatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Dandan Huang
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
- Clinic Center of Human Gene Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Xi Luo
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
- Clinic Center of Human Gene Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
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Chen X, Shi W, Xie Y, Wang Y, Yao Q, Ke H, Xu X, Liu H, Liu P, Zhou X. Hepatic Krüppel-like factor 14 regulates lipid metabolism in nonalcoholic steatohepatitis mice. FASEB J 2023; 37:e23070. [PMID: 37389939 DOI: 10.1096/fj.202300448r] [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: 03/09/2023] [Revised: 05/31/2023] [Accepted: 06/20/2023] [Indexed: 07/01/2023]
Abstract
Excessive lipid accumulation is a critical characteristic in the development of nonalcoholic steatohepatitis (NASH). The underlying molecular mechanism, however, is unclear. In this study, we explored whether and how Krüppel-like factor 14 (KLF14) affects hepatic lipid metabolism in NASH. KLF14 expression was detected in NASH patients and mice fed a choline-deficient, L-amino acid-defined, high-fat diet (CDAHFD). Adeno-associated viruses and adenoviruses were used to alter hepatic KLF14 expression in vivo or in vitro to investigate how KLF14 functions in lipid regulation. The molecular mechanisms were explored using RNA-seq, luciferase reporter, and ChIP assays. The fatty liver phenotype was analyzed histopathologically, and serum and hepatocyte biochemical parameters were measured. The NASH mouse model developed quickly in C57BL/6J mice fed a CDAHFD for 8 weeks. We found that KLF14 expression was decreased in NASH patients and CDAHFD mice. Oleic acid and palmitic acid treatment also reduced KLF14 levels in hepatocytes. KLF14 knockdown downregulated the genes involved in fatty acid oxidation, promoting the progression of hepatic steatosis. In contrast, hepatic KLF14 overexpression alleviated lipid accumulation and oxidative stress in CDAHFD mice. These effects resulted from direct activation of the PPARα signaling pathway. PPARα inhibition diminished the KLF14 overexpression-reduced protective effects against steatosis in OA&PA-treated MPHs and AAV-KLF14-infected CDAHFD mice. These data reveal that hepatic KLF14 regulates lipid accumulation and oxidative stress through the KLF14-PPARα pathway as NASH progresses. KLF14 may be a novel therapeutic target for hepatic steatosis.
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Affiliation(s)
- Xiaoyan Chen
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, China
- Gastroenterology Institute of Jiangxi Province, Nanchang, China
| | - Wenjie Shi
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Yong Xie
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, China
- Gastroenterology Institute of Jiangxi Province, Nanchang, China
| | - Yunwu Wang
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Qian Yao
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, China
- Gastroenterology Institute of Jiangxi Province, Nanchang, China
| | - Huajing Ke
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Xuan Xu
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, China
- Gastroenterology Institute of Jiangxi Province, Nanchang, China
| | - Hui Liu
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, China
- Gastroenterology Institute of Jiangxi Province, Nanchang, China
| | - Pi Liu
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, China
- Department of Gastroenterology, The People's Hospital of Longhua, Shenzhen, China
| | - Xiaojiang Zhou
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, China
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Alanazi AS, Rasheed S, Rehman K, Mallhi TH, Akash MSH, Alotaibi NH, Alzarea AI, Tanveer N, Khan YH. Biochemical association of regulatory variant of KLF14 genotype in the pathogenesis of cardiodiabetic patients. Front Endocrinol (Lausanne) 2023; 14:1176166. [PMID: 37351102 PMCID: PMC10282989 DOI: 10.3389/fendo.2023.1176166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 05/18/2023] [Indexed: 06/24/2023] Open
Abstract
Background and purpose The study focuses on examining the relationship between a single nucleotide polymorphism (SNP) in KLF14 rs4731702 and risk of type 2 diabetes mellitus (T2DM) and dyslipidemia in different ethnic populations. The purpose of this study was to evaluate the association between KLF14 rs4731702 and serum lipid profile and to determine the frequency distribution of KLF14 rs4731702 among T2DM and cardiometabolic patients. Methods A total of 300 volunteers were recruited, consisting of three groups: 100 healthy individuals, 100 individuals diagnosed with T2DM, and 100 individuals diagnosed with cardiometabolic disorders. Biochemical analysis of blood samples was conducted to assess various biomarkers related to glycemic control and lipid profile. This involved measuring levels of glucose, triglyceride (TG), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C), and ApoA1. Genotyping analysis was performed to investigate KLF14 rs4731702 polymorphism. The Tetra ARMS-PCR method was employed for genotyping analysis. Results The results of biochemical profiling revealed a significant association between altered glycemic biomarkers and lipid profile in diseased patients compared to healthy participants. The frequencies of KLF14 rs4731702 alleles and genotypes were compared between the control group and T2DM group. A statistically significant difference was observed, indicating a potential association between KLF14 rs4731702 and T2DM. In the dominant inheritance model of KLF14 rs4731702 SNP, a statistically significant difference [odds ratio (95% confidence interval)] of 0.56 (0.34 -0.96) was found between the control and T2DM subjects. This suggests that the presence of certain genotypes influences the risk of T2DM. In T2DM patients, individuals carrying the C allele exhibited compromised insulin sensitivity, decreased HDL-C and ApoA1 levels, and increased serum glucose, TG, and LDL-C concentrations. Conversely, TT genotype carriers demonstrated increased levels of HDL-C and ApoA1, lower insulin resistance, serum glucose, LDL-C, and TG levels. Conclusion The study's findings indicate that dyslipidemia in T2DM patients is associated with reduced KLF14 functionality due to CC and CT genotypes, leading to insulin resistance and an increased risk of cardiovascular diseases. Additionally, risk of KLF14 rs4731702 polymorphism was found to increase with age and was more prevalent in female than in male individuals. These insights contribute to understanding genetic factors influencing the development and progression of T2DM and dyslipidemia in different ethnic populations.
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Affiliation(s)
- Abdullah Salah Alanazi
- Department of Clinical Pharmacy, College of Pharmacy, Jouf University, Sakaka, Al-Jouf, Saudi Arabia
- Health Sciences Research Unit, Jouf University, Sakaka, Al-Jouf, Saudi Arabia
| | - Sumbal Rasheed
- Department of Pharmaceutical Chemistry, Government College University, Faisalabad, Pakistan
| | - Kanwal Rehman
- Department of Pharmacy, The Women University, Multan, Pakistan
| | - Tauqeer Hussain Mallhi
- Department of Clinical Pharmacy, College of Pharmacy, Jouf University, Sakaka, Al-Jouf, Saudi Arabia
| | | | - Nasser Hadal Alotaibi
- Department of Clinical Pharmacy, College of Pharmacy, Jouf University, Sakaka, Al-Jouf, Saudi Arabia
| | - Abdulaziz Ibrahim Alzarea
- Department of Clinical Pharmacy, College of Pharmacy, Jouf University, Sakaka, Al-Jouf, Saudi Arabia
| | - Nida Tanveer
- Institute of Molecular Cardiology, University of Louisville, Louisville, KY, United States
| | - Yusra Habib Khan
- Department of Clinical Pharmacy, College of Pharmacy, Jouf University, Sakaka, Al-Jouf, Saudi Arabia
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Chen L, Sha ML, Chen FT, Jiang CY, Li D, Xu CL, Pan DS, Xu ZJ, Tang QL, Xia SJ, Sun LH, Fan GJ, Shao Y. Upregulation of KLF14 expression attenuates kidney fibrosis by inducing PPARα-mediated fatty acid oxidation. Free Radic Biol Med 2023; 195:132-144. [PMID: 36584797 DOI: 10.1016/j.freeradbiomed.2022.12.096] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 12/26/2022] [Accepted: 12/26/2022] [Indexed: 12/29/2022]
Abstract
Tubulointerstitial fibrosis (TIF) is essential during the development of end-stage kidney disease (ESKD) and is associated with the impairment of fatty acid oxidation (FAO). Kruppel-like factor 14 (KLF14) is an important gene in lipid metabolism, but its role in TIF remains unknown. TGF-β-stimulated HK-2 cells and mouse unilateral ureteral obstruction (UUO) were used as renal fibrosis models. The role of KLF14 in the process of renal fibrosis was verified by gene knockout mice, genetic or pharmacological interference in animal model and cell model respectively. In the current study, we found that KLF14 expression increased after activation of the TGF-β signaling pathway during TIF. In KLF14-/- mice, more severe fibrosis was observed after unilateral ureteral obstruction (UUO) was induced. In human HK2 cells, knockdown of KLF14 led to more severe fibrosis induced by TGF-β1, while overexpression of KLF14 partially attenuated this process. Specifically, KLF14 deficiency decreased mitochondrial FAO activity, resulting in lipid accumulation. Thus, the energy supply to the cells was insufficient, finally resulting in TIF. We further proved that KLF14 could target peroxisome proliferator activated receptor alpha (PPARα) as a transcriptional activator. This study identified the upregulation of KLF14 expression in response to kidney stress during the process of fibrosis. Upon TIF, the activated TGF-β signaling pathway can enhance KLF14 expression, while the upregulation of KLF14 expression can decrease the degree of TIF by improving FAO activity in tubular epithelial cells and recovering the energy supply mediated by PPARα.
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Affiliation(s)
- Lei Chen
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China; Institute of Urology, Shanghai Jiao Tong University, Shanghai, China
| | - Ming-Lei Sha
- Department of Geriatric, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China
| | - Fei-Teng Chen
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China; Institute of Urology, Shanghai Jiao Tong University, Shanghai, China
| | - Chen-Yi Jiang
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China; Institute of Urology, Shanghai Jiao Tong University, Shanghai, China
| | - Deng Li
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China; Institute of Urology, Shanghai Jiao Tong University, Shanghai, China
| | - Chao-Liang Xu
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China; Institute of Urology, Shanghai Jiao Tong University, Shanghai, China
| | - De-Shen Pan
- Laboratory of Cancer Genomics and Biology, Department of Urology, And Institute of Translational Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China
| | - Zi-Jie Xu
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China; Institute of Urology, Shanghai Jiao Tong University, Shanghai, China
| | - Qi-Lin Tang
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China; Institute of Urology, Shanghai Jiao Tong University, Shanghai, China
| | - Shu-Jie Xia
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China; Institute of Urology, Shanghai Jiao Tong University, Shanghai, China
| | - Lian-Hui Sun
- Precision Research Center for Refractory Diseases, Institute for Clinical Research, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China.
| | - Guang-Jian Fan
- Precision Research Center for Refractory Diseases, Institute for Clinical Research, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China.
| | - Yi Shao
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China; Institute of Urology, Shanghai Jiao Tong University, Shanghai, China.
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Akash MSH, Rasheed S, Rehman K, Ibrahim M, Imran M, Assiri MA. Biochemical Activation and Regulatory Functions of Trans-Regulatory KLF14 and Its Association with Genetic Polymorphisms. Metabolites 2023; 13:metabo13020199. [PMID: 36837818 PMCID: PMC9962810 DOI: 10.3390/metabo13020199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 01/26/2023] [Accepted: 01/27/2023] [Indexed: 01/31/2023] Open
Abstract
Krüpple-Like family of transcription factor-14 (KLF14) is a master trans-regulatory gene that has multiple biological regulatory functions and is involved in many pathological mechanisms. It controls the expressions of several other genes which are involved in multiple regulatory functions. KLF14 plays a significant role in lipid metabolism, glucose regulation and insulin sensitivity. Cell apoptosis, proliferation, and differentiation are regulated by the KLF14 gene, and up-regulation of KLF14 prevents cancer progression. KLF14 has been used as an epigenetic biomarker for the estimation of chronological age due to the presence of different age-related CpG sites on genes that become methylated with age. Different genome-wide association studies have identified several KLF14 variants in adipose tissues. These single nucleotide polymorphisms in KLF14 have been associated with dyslipidemia, insulin resistance, and glucose intolerance. Moreover, the prevalence of genetic polymorphism is different in different populations due to ethnic differences and epigenetic modifications. In addition, environmental and physiological factors such as diet, age, gender, and obesity are also responsible for genetic mutations in KLF14.
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Affiliation(s)
- Muhammad Sajid Hamid Akash
- Department of Pharmaceutical Chemistry, Government College University, Faisalabad 38000, Pakistan
- Correspondence: (M.S.H.A.); (K.R.)
| | - Sumbal Rasheed
- Department of Pharmaceutical Chemistry, Government College University, Faisalabad 38000, Pakistan
| | - Kanwal Rehman
- Department of Pharmacy, The Women University, Multan 60000, Pakistan
- Correspondence: (M.S.H.A.); (K.R.)
| | - Muhammad Ibrahim
- Department of Applied Chemistry, Government College University, Faisalabad 38000, Pakistan
| | - Muhammad Imran
- Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha 62413, Saudi Arabia
- Department of Chemistry, Faculty of Science, King Khalid University, Abha 62413, Saudi Arabia
| | - Mohammed A. Assiri
- Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha 62413, Saudi Arabia
- Department of Chemistry, Faculty of Science, King Khalid University, Abha 62413, Saudi Arabia
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Zhou H, Chen J, Fan M, Cai H, Dong Y, Qiu Y, Zhuang Q, Lei Z, Li M, Ding X, Yan P, Lin A, Zheng S, Yan Q. KLF14 regulates the growth of hepatocellular carcinoma cells via its modulation of iron homeostasis through the repression of iron-responsive element-binding protein 2. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2023; 42:5. [PMID: 36600258 DOI: 10.1186/s13046-022-02562-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 12/06/2022] [Indexed: 01/06/2023]
Abstract
BACKGROUND Hepatocellular carcinoma (HCC) is a multifactor-driven malignant tumor with rapid progression, which causes the difficulty to substantially improve the prognosis of HCC. Limited understanding of the mechanisms in HCC impedes the development of efficacious therapies. Despite Krüpple-Like factors (KLFs) were reported to be participated in HCC pathogenesis, the function of KLF14 in HCC remains largely unexplored. METHODS We generated KLF14 overexpressed and silenced liver cancer cells, and nude mouse xenograft models for the in vitro and in vivo study. Luciferase reporter assay, ChIP-qPCR, Co-IP, immunofluorescence were performed for mechanism research. The expression of KLF14 in HCC samples was analyzed by quantitative RT-PCR, Western blotting, and immunohistochemistry (IHC) analysis. RESULTS KLF14 was significantly downregulated in human HCC tissues, which was highly correlated with poor prognosis. Inhibition of KLF14 promoted liver cancer cells proliferation and overexpression of KLF14 suppressed cells growth. KLF14 exerts its anti-tumor function by inhibiting Iron-responsive element-binding protein 2 (IRP2), which then causes transferrin receptor-1(TfR1) downregulation and ferritin upregulation on the basis of IRP-IREs system. This then leading to cellular iron deficiency and HCC cells growth suppression in vitro and in vivo. Interestingly, KLF14 suppressed the transcription of IRP2 via recruiting SIRT1 to reduce the histone acetylation of the IRP2 promoter, resulting in iron depletion and cell growth suppression. More important, we found fluphenazine is an activator of KLF14, inhibiting HCC cells growth through inducing iron deficiency. CONCLUSION KLF14 acts as a tumor suppressor which inhibits the proliferation of HCC cells by modulating cellular iron metabolism via the repression of IRP2. We identified Fluphenazine, as an activator of KLF14, could be a potential compound for HCC therapy. Our findings therefore provide an innovative insight into the pathogenesis of HCC and a promising therapeutic target.
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Affiliation(s)
- Hui Zhou
- College of Life Science, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Junru Chen
- Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, Zhejiang, China
| | - Mingjie Fan
- College of Life Science, Zhejiang University, Hangzhou, 310058, Zhejiang, China.,Department of Pediatrics, The First Affiliated Hospital, School of Medicine Zhejiang University, Hangzhou, 310003, Zhejiang, China
| | - Huajian Cai
- College of Life Science, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Yufei Dong
- College of Life Science, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Yue Qiu
- College of Life Science, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Qianqian Zhuang
- College of Life Science, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Zhaoying Lei
- College of Life Science, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Mengyao Li
- College of Life Science, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Xue Ding
- College of Life Science, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Peng Yan
- College of Life Science, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Aifu Lin
- College of Life Science, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Shusen Zheng
- Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, Zhejiang, China.
| | - Qingfeng Yan
- College of Life Science, Zhejiang University, Hangzhou, 310058, Zhejiang, China. .,Department of Pediatrics, The First Affiliated Hospital, School of Medicine Zhejiang University, Hangzhou, 310003, Zhejiang, China. .,Key Laboratory for Cell and Gene Engineering of Zhejiang Province, Hangzhou, 310058, Zhejiang, China.
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Liu L, Yuan Y, Zhou Y, Yao L, Li J, Chen F. The transcription factor KLF14 attenuates LPS-induced acute lung injury by ameliorating apoptosis of alveolar epithelial cells in mice. Mol Immunol 2022; 152:67-77. [DOI: 10.1016/j.molimm.2022.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Revised: 09/25/2022] [Accepted: 10/07/2022] [Indexed: 11/06/2022]
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10
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Wu S, Hsu LA, Teng MS, Chou HH, Ko YL. Differential Genetic and Epigenetic Effects of the KLF14 Gene on Body Shape Indices and Metabolic Traits. Int J Mol Sci 2022; 23:ijms23084165. [PMID: 35456983 PMCID: PMC9032945 DOI: 10.3390/ijms23084165] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 04/03/2022] [Accepted: 04/06/2022] [Indexed: 02/06/2023] Open
Abstract
The KLF14 gene is a key metabolic transcriptional transregulator with monoallelic maternal expression. KLF14 variants are only associated with adipose tissue gene expression, and KLF14 promoter methylation is strongly associated with age. This study investigated whether age, sex, and obesity mediate the effects of KLF14 variants and DNA methylation status on body shape indices and metabolic traits. In total, the data of 78,742 and 1636 participants from the Taiwan Biobank were included in the regional plot association analysis for KLF14 variants and KLF14 methylation, respectively. Regional plot association studies revealed that the KLF14 rs4731702 variant and the nearby strong linkage disequilibrium polymorphisms were the lead variants for lipid profiles, blood pressure status, insulin resistance surrogate markers, and metabolic syndrome mainly in female participants and for body shape indices mainly in obese women. Significant age-dependent associations between KLF14 promoter methylation levels and body shape indices, and metabolic traits were also noted predominantly in female participants. KLF14 variants and KLF14 hypermethylation status were associated with metabolically healthy and unhealthy phenotypes, respectively, in obese individuals, and only the KLF14 variants demonstrated a significant association with both higher adiposity and lower cardiometabolic risk in the same allele, revealing uncoupled excessive adiposity from its cardiometabolic comorbidities, especially in obese women. Variations of KLF14 are associated with body shape indices, metabolic traits, insulin resistance, and metabolically healthy status. Differential genetic and epigenetic effects of KLF14 are age-, sex- and obesity-dependent. These results provided a personalized reference for the management of cardiometabolic diseases in precision medicine.
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Affiliation(s)
- Semon Wu
- Department of Life Science, Chinese Culture University, Taipei 11114, Taiwan;
| | - Lung-An Hsu
- The First Cardiovascular Division, Department of Internal Medicine, Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Taoyuan 33305, Taiwan;
| | - Ming-Sheng Teng
- Department of Research, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City 23142, Taiwan;
| | - Hsin-Hua Chou
- The Division of Cardiology, Department of Internal Medicine and Cardiovascular Center, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City 23142, Taiwan;
- School of Medicine, Tzu Chi University, Hualien 97004, Taiwan
| | - Yu-Lin Ko
- Department of Research, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City 23142, Taiwan;
- The Division of Cardiology, Department of Internal Medicine and Cardiovascular Center, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City 23142, Taiwan;
- School of Medicine, Tzu Chi University, Hualien 97004, Taiwan
- Correspondence: ; Tel.: +886-2-6628-9779 (ext. 5355); Fax: +886-2-6628-9009
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11
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Xu Q, Li Y, Lin S, Wang Y, Zhu J, Lin Y. KLF4 Inhibits the Differentiation of Goat Intramuscular Preadipocytes Through Targeting C/EBPβ Directly. Front Genet 2021; 12:663759. [PMID: 34421986 PMCID: PMC8373462 DOI: 10.3389/fgene.2021.663759] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 04/06/2021] [Indexed: 12/19/2022] Open
Abstract
Intramuscular fat (IMF) deposition is a complicated process, and most of the underlying regulators of this biological process are unknown. Here, we cloned the intact CDS of KLF4 gene, investigated the role of KLF4 by gaining or losing function in vitro and further explored the pathways of KLF4 regulating differentiation of intramuscular preadipocytes in goat. Our results show that goat KLF4 gene consists of 1,536 bp encoding a protein of 486 amino acids. The expression of KLF4 is higher in the lung while lower in the heart and muscle in goat. Knockdown of KLF4 mediated by siRNA technique significantly promotes intramuscular preadipocyte lipid accumulation and upregulates mRNA expression of adipogenic related genes including C/EBPα, C/EBPβ, and PPARγ in vivo cultured cells. Consistently, overexpression of KLF4 inhibits intramuscular adipocyte lipid accumulation and significantly downregulation gene expression of C/EBPβ, PPARγ, aP2, and Pref-1. Further, we found that other members of KLFs were upregulated or downregulated after interference or overexpression of KLF4, including KLF2 and KLF5-7. We also found that C/EBPβ was a potential target of KLF4, because it had an opposite expression pattern with KLF4 during the differentiation of intramuscular preadipocytes and had putative binding sites of KLF4. The dual-luciferase reporter assay indicated that overexpression of KLF4 inhibited the transcriptional activity of C/EBPβ. These results demonstrate that KLF4 inhibits the differentiation of intramuscular preadipocytes in goat by targeting C/EBPβ.
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Affiliation(s)
- Qing Xu
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Southwest Minzu University, Chengdu, China.,Key Laboratory of Sichuan Province for Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Exploitation, Southwest Minzu University, Chengdu, China.,College of Animal Science and Veterinary Medicine, Southwest Minzu University, Chengdu, China
| | - Yanyan Li
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Southwest Minzu University, Chengdu, China.,College of Animal Science and Veterinary Medicine, Southwest Minzu University, Chengdu, China
| | - Sen Lin
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Southwest Minzu University, Chengdu, China.,Key Laboratory of Sichuan Province for Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Exploitation, Southwest Minzu University, Chengdu, China
| | - Yong Wang
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Southwest Minzu University, Chengdu, China.,Key Laboratory of Sichuan Province for Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Exploitation, Southwest Minzu University, Chengdu, China.,College of Animal Science and Veterinary Medicine, Southwest Minzu University, Chengdu, China
| | - Jiangjiang Zhu
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Southwest Minzu University, Chengdu, China.,Key Laboratory of Sichuan Province for Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Exploitation, Southwest Minzu University, Chengdu, China
| | - Yaqiu Lin
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Southwest Minzu University, Chengdu, China.,Key Laboratory of Sichuan Province for Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Exploitation, Southwest Minzu University, Chengdu, China.,College of Animal Science and Veterinary Medicine, Southwest Minzu University, Chengdu, China
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12
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Du Z, Liu M, Wang Z, Lin Z, Feng Y, Tian D, Xia L. EZH2-mediated inhibition of KLF14 expression promotes HSCs activation and liver fibrosis by downregulating PPARγ. Cell Prolif 2021; 54:e13072. [PMID: 34031939 PMCID: PMC8249795 DOI: 10.1111/cpr.13072] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 04/21/2021] [Accepted: 04/26/2021] [Indexed: 12/14/2022] Open
Abstract
OBJECTIVES Induction of deactivation and apoptosis of hepatic stellate cells (HSCs) are principal therapeutic strategies for liver fibrosis. Krüppel-like factor 14 (KLF14) regulates various biological processes, however, roles, mechanisms and implications of KLF14 in liver fibrosis are unknown. MATERIALS AND METHODS KLF14 expression was detected in human, rat and mouse fibrotic models, and its effects on HSCs were assessed. Chromatin immunoprecipitation assays were utilized to investigate the binding of KLF14 to peroxisome proliferator-activated receptor γ (PPARγ) promoter, and the binding of enhancer of zeste homolog 2 (EZH2) to KLF14 promoter. In vivo, KLF14-overexpressing adenovirus was injected via tail vein to thioacetamide (TAA)-treated rats to investigate the role of KLF14 in liver fibrosis progression. EZH2 inhibitor EPZ-6438 was utilized to treat TAA-induced rat liver fibrosis. RESULTS KLF14 expression was remarkably decreased in human, rat and mouse fibrotic liver tissues. Overexpression of KLF14 increased LD accumulation, inhibited HSCs activation, proliferation, migration and induced G2/M arrest and apoptosis. Mechanistically, KLF14 transactivated PPARγ promoter activity. Inhibition of PPARγ blocked the suppressive role of KLF14 overexpression in HSCs. Downregulation of KLF14 in activated HSCs was mediated by EZH2-regulated histone H3 lysine 27 trimethylation. Adenovirus-mediated KLF14 overexpression ameliorated TAA-induced rat liver fibrosis in PPARγ-dependent manner. Furthermore, EPZ-6438 dramatically alleviated TAA-induced rat liver fibrosis. Importantly, KLF14 expression was decreased in human with liver fibrosis, which was significantly correlated with EZH2 upregulation and PPARγ downregulation. CONCLUSIONS KLF14 exerts a critical anti-fibrotic role in liver fibrosis, and targeting the EZH2/KLF14/PPARγ axis might be a novel therapeutic strategy for liver fibrosis.
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Affiliation(s)
- Zhipeng Du
- Hubei Key Laboratory of Hepato-Pancreato-Biliary Diseases, Department of Gastroenterology, Institute of Liver and Gastrointestinal Diseases, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Mei Liu
- Hubei Key Laboratory of Hepato-Pancreato-Biliary Diseases, Department of Gastroenterology, Institute of Liver and Gastrointestinal Diseases, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhihui Wang
- Hubei Key Laboratory of Hepato-Pancreato-Biliary Diseases, Department of Gastroenterology, Institute of Liver and Gastrointestinal Diseases, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhuoying Lin
- Hubei Key Laboratory of Hepato-Pancreato-Biliary Diseases, Department of Gastroenterology, Institute of Liver and Gastrointestinal Diseases, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yangyang Feng
- Hubei Key Laboratory of Hepato-Pancreato-Biliary Diseases, Department of Gastroenterology, Institute of Liver and Gastrointestinal Diseases, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Dean Tian
- Hubei Key Laboratory of Hepato-Pancreato-Biliary Diseases, Department of Gastroenterology, Institute of Liver and Gastrointestinal Diseases, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Limin Xia
- Hubei Key Laboratory of Hepato-Pancreato-Biliary Diseases, Department of Gastroenterology, Institute of Liver and Gastrointestinal Diseases, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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13
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Shahvazian E, Mahmoudi MB, Farashahi Yazd E, Gharibi S, Moghimi B, HosseinNia P, Mirzaei M. The KLF14 Variant is Associated with Type 2 Diabetes and HbA 1C Level. Biochem Genet 2021; 59:574-588. [PMID: 33389382 DOI: 10.1007/s10528-020-10015-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Accepted: 10/30/2020] [Indexed: 12/20/2022]
Abstract
The purpose of this study was to scan variants in coding region of Krȕppel like factor14 (KLF14) locus and assess association related to type 2 diabetes (T2D) in Iranian population. We sequenced the coding region of KLF14 to scan variants in case-sibling study (92 individuals with T2D and 92 healthy older siblings). To confirm, we analyzed rs76603546 association with T2D in a larger unrelated case-control study by PCR-RFLP (475 cases and 512 controls). We analyzed the association of rs76603546 with HbA1C, BMI, fat mass, waist circumference, fasting glucose, cholesterol and HOMA-IR (Homeostatic Model Assessment for Insulin Resistance) using one-way ANOVA analysis. Also, association of genotypes with T2D adjusted for confounding variables was analyzed using logistic regression. HaploReg v 4.1 was used to predict rs76603546 possible function. Sequencing results analysis revealed the association of C allele of rs76603546, synonymous variant C>T, [OR 2.10 (1.38-3.20), P value < 0.001] and CC genotype of rs76603546 [OR 4.3 (1.79-10.23), P value = 0.001] with susceptibility to T2D. PCR-Restriction Fragment Length Polymorphism (RFLP) results analysis confirmed the association of rs76603546 with T2D [C allele, OR 1.91 (1.59-2.29), P value = 0.002, CC genotype, OR 3.27 (2.26-4.73), P value = 0.002 and TC genotype, OR 1.74 (1.31-2.31), P value = 0.001]. The CC genotype of rs76603546 is associated with HbA1C level (P value < 0.001) and BMI (P value = 0.02). After adjustment with confounding variables, we observed association of CC genotype with T2D [OR 2.542 (1.25-3.77), P value = 0.03]. Among over 220 SNPs, rs76603546 was associated with T2D, HbA1C and BMI in our study.
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Affiliation(s)
- Ensieh Shahvazian
- Department of Genetics, Faculty of Medicine, International Campus, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Mohammad Bagher Mahmoudi
- Department of Genetics, Faculty of Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Ehsan Farashahi Yazd
- Department of Genetics, Faculty of Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran. .,Stem Cell Biology Research Center, Yazd Reproductive Sciences Institute, Shahid Sadoughi University of Medical Sciences, Yazd, Iran. .,Yazd Reproductive Sciences Institute, Bu-Ali Ave., Timsar Fallahi St., Safaeieh, Yazd, Iran.
| | - Saba Gharibi
- Department of Genetics, Faculty of Medicine, International Campus, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Bahram Moghimi
- Department of Genetics, Faculty of Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | | | - Masoud Mirzaei
- Yazd Cardiovascular Research Centre, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
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14
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Klf9 is a key feedforward regulator of the transcriptomic response to glucocorticoid receptor activity. Sci Rep 2020; 10:11415. [PMID: 32651405 PMCID: PMC7351738 DOI: 10.1038/s41598-020-68040-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 06/17/2020] [Indexed: 01/01/2023] Open
Abstract
The zebrafish has recently emerged as a model system for investigating the developmental roles of glucocorticoid signaling and the mechanisms underlying glucocorticoid-induced developmental programming. To assess the role of the Glucocorticoid Receptor (GR) in such programming, we used CRISPR-Cas9 to produce a new frameshift mutation, GR369-, which eliminates all potential in-frame initiation codons upstream of the DNA binding domain. Using RNA-seq to ask how this mutation affects the larval transcriptome under both normal conditions and with chronic cortisol treatment, we find that GR mediates most of the effects of the treatment, and paradoxically, that the transcriptome of cortisol-treated larvae is more like that of larvae lacking a GR than that of larvae with a GR, suggesting that the cortisol-treated larvae develop GR resistance. The one transcriptional regulator that was both underexpressed in GR369- larvae and consistently overexpressed in cortisol-treated larvae was klf9. We therefore used CRISPR-Cas9-mediated mutation of klf9 and RNA-seq to assess Klf9-dependent gene expression in both normal and cortisol-treated larvae. Our results indicate that Klf9 contributes significantly to the transcriptomic response to chronic cortisol exposure, mediating the upregulation of proinflammatory genes that we reported previously.
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15
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Yang Q, Civelek M. Transcription Factor KLF14 and Metabolic Syndrome. Front Cardiovasc Med 2020; 7:91. [PMID: 32548128 PMCID: PMC7274157 DOI: 10.3389/fcvm.2020.00091] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Accepted: 04/29/2020] [Indexed: 12/12/2022] Open
Abstract
Metabolic syndrome (MetSyn) is a combination of metabolic abnormalities that lead to the development of cardiovascular disease (CVD) and Type 2 Diabetes (T2D). Although various criteria for defining MetSyn exist, common abnormalities include abdominal obesity, elevated serum triglyceride, insulin resistance, and blood glucose, decreased high-density lipoprotein cholesterol (HDL-C), and hypertension. MetSyn prevalence has been increasing with the rise of obesity worldwide, with significantly higher prevalence in women compared with men and in Hispanics compared with Whites. Affected individuals are at a higher risk of developing T2D (5-fold) and CVD (2-fold). Heritability estimates for individual components of MetSyn vary between 40 and 70%, suggesting a strong contribution of an individual's genetic makeup to disease pathology. The advent of next-generation sequencing technologies has enabled large-scale genome-wide association studies (GWAS) into the genetics underlying MetSyn pathogenesis. Several such studies have implicated the transcription factor KLF14, a member of the Krüpple-like factor family (KLF), in the development of metabolic diseases, including obesity, insulin resistance, and T2D. How KLF14 regulates these metabolic traits and increases the risk of developing T2D, atherosclerosis, and liver dysfunction is still unknown. There have been some debate and controversial results with regards to its expression profile and functionality in various tissues, and a systematic review of current knowledge on KLF14 is lacking. Here, we summarize the research progress made in understanding the function of KLF14 and describe common attributes of its biochemical, physiological, and pathophysiological roles. We also discuss the current challenges in understanding the role of KLF14 in metabolism and provide suggestions for future directions.
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Affiliation(s)
- Qianyi Yang
- Center for Public Health Genomics, University of Virginia, Charlottesville, VA, United States
| | - Mete Civelek
- Center for Public Health Genomics, University of Virginia, Charlottesville, VA, United States
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA, United States
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16
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Chen X, Shi W, Zhang H. The role of KLF14 in multiple disease processes. Biofactors 2020; 46:276-282. [PMID: 31925990 DOI: 10.1002/biof.1612] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 10/31/2019] [Indexed: 12/13/2022]
Abstract
Kruppel-like factor 14 (KLF14) is a newly identified member of the KLF family. Expression of KLF14 is induced by TGF-β in intrauterine and ectodermal tissue. Initial researches on KLF14 focused on its role in lipid and glucose metabolism. In recent years, however, the role of KLF14 in regulating cell signaling pathways, cell proliferation and differentiation has been explored. Moreover, the research has gradually extended into the field of tumorigenesis and immune regulation. This paper aims to briefly review the functions of KLF14 in physiologyical and pathological process.
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Affiliation(s)
- Xiaoyan Chen
- Department of Gastroenterology, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wenjie Shi
- Department of Gastroenterology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Heng Zhang
- Department of Gastroenterology, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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17
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Xu Q, Lin S, Li Q, Lin Y, Xiong Y, Zhu J, Wang Y. Fibroblast growth factor 21 regulates lipid accumulation and adipogenesis in goat intramuscular adipocyte. Anim Biotechnol 2019; 32:318-326. [PMID: 31880478 DOI: 10.1080/10495398.2019.1691010] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Fibroblast growth factor 21 (FGF21) plays a critical role in the regulation of lipid metabolism; however, its function in goat intramuscular fat (IMF) deposition remains unknown. To explore the role of FGF21 for goat IMF deposition, we performed gain and loss function of FGF21 in intramuscular adipocyte. Our results showed that overexpression of FGF21 mediated by adenovirus inhibits lipid accumulation of goat intramuscular adipocyte, accompanied by down-regulating the mRNA levels of peroxisome proliferator activated receptor γ (PPARγ), adipocyte fatty acid-binding protein 2 (aP2) and sterol regulatory element-binding protein 1 (SREBP1), but up-regulating counterpart of preadipocyte factor1 (Pref1). Conversely, siRNAs knocking down FGF21 promotes the expression of PPARγ and CCAAT/enhancer binding protein-α (C/EBPα) but suppressed that of lipoprotein lipase (LPL) and Pref1. Meanwhile, we found that FGF21 regulates the expression of many KLFs transcription factors, such as KLF3, 7, 9, 11, 14, and 16. These findings demonstrate a key role of FGF21 as a negative factor in the regulation of adipogenic differentiation in goat intramuscular preadipocyte.
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Affiliation(s)
- Qing Xu
- School of Life Science and Technology, Southwest Minzu University, Chengdu, China.,Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Southwest Minzu University, Chengdu, China
| | - Sen Lin
- School of Life Science and Technology, Southwest Minzu University, Chengdu, China.,Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Southwest Minzu University, Chengdu, China
| | - Qian Li
- School of Life Science and Technology, Southwest Minzu University, Chengdu, China.,Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Southwest Minzu University, Chengdu, China
| | - Yaqiu Lin
- School of Life Science and Technology, Southwest Minzu University, Chengdu, China.,Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Southwest Minzu University, Chengdu, China
| | - Yan Xiong
- School of Life Science and Technology, Southwest Minzu University, Chengdu, China.,Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Southwest Minzu University, Chengdu, China
| | - Jiangjiang Zhu
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Southwest Minzu University, Chengdu, China.,Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization Key Laboratory of Sichuan Province, Chengdu, China
| | - Yong Wang
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization, Ministry of Education, Southwest Minzu University, Chengdu, China.,Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Utilization Key Laboratory of Sichuan Province, Chengdu, China
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18
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Xie W, Li L, Gong D, Zhang M, Lv YC, Guo DM, Zhao ZW, Zheng XL, Zhang DW, Dai XY, Yin WD, Tang CK. Krüppel-like factor 14 inhibits atherosclerosis via mir-27a-mediated down-regulation of lipoprotein lipase expression in vivo. Atherosclerosis 2019; 289:143-161. [DOI: 10.1016/j.atherosclerosis.2019.08.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 08/15/2019] [Accepted: 08/22/2019] [Indexed: 12/15/2022]
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19
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Klf14 is an imprinted transcription factor that regulates placental growth. Placenta 2019; 88:61-67. [PMID: 31675530 DOI: 10.1016/j.placenta.2019.09.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 09/24/2019] [Accepted: 09/26/2019] [Indexed: 01/15/2023]
Abstract
INTRODUCTION Imprinted genes are preferentially expressed from one parentally inherited allele, and many are crucial to the regulation of placental function and fetal growth. Murine Krüppel-like factor 14 (Klf14) is a maternally expressed imprinted transcription factor that is a component of the Mest imprinted gene cluster on mouse chromosome 6. We sought to determine if loss of Klf14 expression alters the course of normal mouse extraembryonic development. We also used high-throughput RNA sequencing (RNAseq) to identify a set of differentially expressed genes (DEGs) in placentas with loss of Klf14. METHODS We generated a Klf14 knockout (Klf14null) mouse using recombineering and transgenic approaches. To identify DEGs in the mouse placenta we compared mRNA transcriptomes derived from 17.5dpc Klf14matKO and wild-type littermate placentas by RNAseq. Candidate DEGs were confirmed with quantitative reverse transcription PCR (qPCR) on an independent cohort of male and female gestational age matched Klf14matKO placentas. RESULTS We found that 17.5dpc placentas inheriting a maternal null allele (Klf14matKO) had a modest overgrowth phenotype and a near complete ablation of Klf14 expression. However, there was no effect on fetal growth. We identified 20 DEGs differentially expressed in Klf14matKO placentas by RNAseq, and subsequently validated five that are highly upregulated (Begain, Col26a1, Fbln5, Gdf10, and Nell1) by qPCR. The most enriched functional gene-networks included those classified as regulating cellular development and metabolism. CONCLUSION These results suggest that loss of the maternal Klf14 locus in the mouse placenta acts results in changes in gene expression patterns that modulate placental growth.
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20
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Wu G, Yuan S, Chen Z, Chen G, Fan Q, Dong H, Ye F, Li J, Zhu X. The KLF14 Transcription Factor Regulates Glycolysis by Downregulating LDHB in Colorectal Cancer. Int J Biol Sci 2019; 15:628-635. [PMID: 30745849 PMCID: PMC6367579 DOI: 10.7150/ijbs.30652] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Accepted: 11/29/2018] [Indexed: 12/24/2022] Open
Abstract
The Krüppel-like transcription factor 14 (KLF14) is a critical regulator of a wide array of biological processes. However, the role of KLF14 in colorectal cancer (CRC) isn't fully investigated. This study aimed to explore the clinicopathological significance and potential role of KLF14 in the carcinogenesis and progression of CRC. A tissue microarray consisting of 185 samples from stage I-III CRC patients was adopted to analyze the correlation between KLF14 expression and clinicopathological parameters, as well as overall survival (OS) and disease-free survival (DFS). The underlying mechanisms of altered KLF14 expression on glycolysis were studied using in vitro and patients' samples. The results showed that KLF14 expression was downregulated in CRC than their normal controls. Low KLF14 expression correlated with advanced T stage (P< 0.001) and N stage (P= 0.040), and larger tumor size (P= 0.008). Lost KLF14 expression implied shorter OS and DFS after colectomy in both univariate and multivariate survival analysis (P<0.05). Experimentally, restore KLF14 expression significantly decreased the rate of glycolysis both in vitro and in patients' sample. Mechanically, KLF14 regulated glycolysis by downregulating glycolytic enzyme LDHB. Collectively, KLF14 is a novel prognostic biomarker for survival in CRC, and downregulation of KLF14 in CRC prompts glycolysis by target LDHB. Hence, KLF14 could constitute potential prognostic predictors and therapeutic targets for CRC.
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Affiliation(s)
- Guiyang Wu
- Department of General Surgery, Taizhou Municipal Hospital, Medical School of Taizhou University, Taizhou 318000, Zhejiang Province, China
| | - Shichao Yuan
- Department of General Surgery, Taizhou Municipal Hospital, Medical School of Taizhou University, Taizhou 318000, Zhejiang Province, China
| | - Zaiping Chen
- Department of General Surgery, Taizhou Municipal Hospital, Medical School of Taizhou University, Taizhou 318000, Zhejiang Province, China
| | - Guoping Chen
- Department of General Surgery, Taizhou Municipal Hospital, Medical School of Taizhou University, Taizhou 318000, Zhejiang Province, China
| | - Qinghao Fan
- Department of General Surgery, Taizhou Municipal Hospital, Medical School of Taizhou University, Taizhou 318000, Zhejiang Province, China
| | - Hao Dong
- Department of General Surgery, Taizhou Municipal Hospital, Medical School of Taizhou University, Taizhou 318000, Zhejiang Province, China
| | - Fubo Ye
- Department of General Surgery, Taizhou Municipal Hospital, Medical School of Taizhou University, Taizhou 318000, Zhejiang Province, China
| | - Jing Li
- Departments of CyberKnife, Huashan Hospital, Fudan University, Shanghai 200032, China
| | - Xiongwen Zhu
- Department of General Surgery, Taizhou Municipal Hospital, Medical School of Taizhou University, Taizhou 318000, Zhejiang Province, China
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Witka BZ, Oktaviani DJ, Marcellino M, Barliana MI, Abdulah R. Type 2 Diabetes-Associated Genetic Polymorphisms as Potential Disease Predictors. Diabetes Metab Syndr Obes 2019; 12:2689-2706. [PMID: 31908510 PMCID: PMC6927489 DOI: 10.2147/dmso.s230061] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 11/19/2019] [Indexed: 12/18/2022] Open
Abstract
Diabetes is a major cause of mortality worldwide. There are several types of diabetes, with type 2 diabetes mellitus (T2DM) being the most common. Many factors, including environmental and genetic factors, are involved in the etiology of the disease. Numerous studies have reported the role of genetic polymorphisms in the initiation and development of T2DM. While genome-wide association studies have identified around more than 200 susceptibility loci, it remains unclear whether these loci are correlated with the pathophysiology of the disease. The present review aimed to elucidate the potential genetic mechanisms underlying T2DM. We found that some genetic polymorphisms were related to T2DM, either in the form of single-nucleotide polymorphisms or direct amino acid changes in proteins. These polymorphisms are potential predictors for the management of T2DM.
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Affiliation(s)
- Beska Z Witka
- Departement of Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Universitas Padjadjaran, Jatinangor, Indonesia
| | - Dede J Oktaviani
- Departement of Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Universitas Padjadjaran, Jatinangor, Indonesia
| | - Marcellino Marcellino
- Departement of Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Universitas Padjadjaran, Jatinangor, Indonesia
| | - Melisa I Barliana
- Departement of Biological Pharmacy, Faculty of Pharmacy, Universitas Padjadjaran, Jatinangor, Indonesia
- Center of Excellence in Higher Education for Pharmaceutical Care Innovation, Universitas Padjadjaran, Jatinangor, Indonesia
- Correspondence: Melisa I Barliana Department of Biological Pharmacy, Faculty of Pharmacy, Universitas Padjadjaran, Jl. Raya Bandung Sumedang KM. 21, Jatinangor45363, Indonesia Email
| | - Rizky Abdulah
- Departement of Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Universitas Padjadjaran, Jatinangor, Indonesia
- Center of Excellence in Higher Education for Pharmaceutical Care Innovation, Universitas Padjadjaran, Jatinangor, Indonesia
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22
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Luo XH, Liu JZ, Wang B, Men QL, Ju YQ, Yin FY, Zheng C, Li W. KLF14 potentiates oxidative adaptation via modulating HO-1 signaling in castrate-resistant prostate cancer. Endocr Relat Cancer 2019; 26:181-195. [PMID: 30400002 DOI: 10.1530/erc-18-0383] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Accepted: 09/11/2018] [Indexed: 12/23/2022]
Abstract
Insights into the mechanisms by which key factors stimulate cell growth under androgen-depleted conditions is a premise to the development of effective treatments with clinically significant activity in patients with castration-resistant prostate cancer (CRPC). Herein, we report that, the expression of Krüppel-like factor 14 (KLF14), a master transcription factor in the regulation of lipid metabolism, was significantly induced in castration-insensitive PCa cells and tumor tissues from a mouse xenograft model of CRPC. KLF14 upregulation in PCa cells, which was stimulated upstream by oxidative stress, was dependent on multiple pathways including PI3K/AKT, p42/p44 MAPK, AMPK and PKC pathways. By means of ectopic overexpression and genetic inactivation, we further show that KLF14 promoted cell growth via positive regulation of the antioxidant response under androgen-depleted conditions. Mechanistically, KLF14 coupled to p300 and CBP to enhance the transcriptional activation of HMOX1, the gene encoding the antioxidative enzyme heme oxygenase-1 (HO-1) that is one of the most important mechanisms of cell adaptation to stress. Transient knockdown of HMOX1 is sufficient to overcome KLF14 overexpression-potentiated PCa cell growth under androgen-depleted conditions. From a pharmacological standpoint, in vivo administration of ZnPPIX (a specific inhibitor of HO-1) effectively attenuates castration-resistant progression in the mouse xenograft model, without changing KLF14 level. Together, these results provide comprehensive insight into the KLF14-dependent regulation of antioxidant response and subsequent pathogenesis of castration resistance and indicate that interventions targeting the KLF14/HO-1 adaptive mechanism should be further explored for CRPC treatment.
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Affiliation(s)
- Xiao-Hui Luo
- Department of Urology, Baoji Center Hospital, Baoji, Shaanxi Province, People's Republic of China
| | - Jian-Zhou Liu
- Department of Urology, Baoji Center Hospital, Baoji, Shaanxi Province, People's Republic of China
| | - Bo Wang
- Department of Urology, Baoji Center Hospital, Baoji, Shaanxi Province, People's Republic of China
| | - Qun-Li Men
- Department of Urology, Baoji Center Hospital, Baoji, Shaanxi Province, People's Republic of China
| | - Yu-Quan Ju
- Department of Urology, Baoji Center Hospital, Baoji, Shaanxi Province, People's Republic of China
| | - Feng-Yan Yin
- Department of Urology, Baoji Center Hospital, Baoji, Shaanxi Province, People's Republic of China
| | - Chao Zheng
- Department of Urology, Baoji Center Hospital, Baoji, Shaanxi Province, People's Republic of China
| | - Wei Li
- Department of Human Anatomy, Histology and Embryology, Fourth Military Medical University, Xi'an, Shaanxi Province, People's Republic of China
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23
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Xu Q, Lin S, Wang Y, Zhu J, Lin Y. Fibroblast growth factor 10 (FGF10) promotes the adipogenesis of intramuscular preadipocytes in goat. Mol Biol Rep 2018; 45:1881-1888. [PMID: 30250994 DOI: 10.1007/s11033-018-4334-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 06/25/2018] [Indexed: 02/06/2023]
Abstract
Fibroblast growth factor 10 (FGF10) is an adipokine that is found to participate in the regulation of adipogenesis. However, its function remains to be elucidated in intramuscular fat (IMF) deposition of goat. The purpose of this study was to explore the role of FGF10 in goat IMF deposition. Here, we investigated the expression of FGF10 in goat intramuscular adipocytes inducing 0, 2, 4, 6 and 8 days. Effect of FGF10 on adipogenesis was investigated by gaining and losing function of FGF10 in vitro. And then, we examined several lipid metabolism-related genes, including peroxisome proliferator activated receptor γ (PPARγ), sterol regulatory element binding protein 1 (SREBP1), preadipocyte factor-1 (Pref-1), CCAAT/enhancer binding protein-α (C/EBPα) and CCAAT/enhancer binding protein-β (C/EBPβ), as well as, Krüppel-like factor (KLF) family. We found that the sharp expression of FGF10 appeared at 2 days. Overexpression of FGF10 mediated by adenovirus promotes lipid accumulation, accompanied by up-regulating of LPL and C/EBPα with the down-regulating of C/EBPβ. Conversely, the expression of LPL, C/EBPα and SREBP1 was significantly decreased by the siRNAs of FGF10. Meanwhile, we showed that FGF10 regulated the expression of many KLFs members and interacted synergistically or antagonistically with them. Thus, our results demonstrated a key role of FGF10 as a positively factor in the regulation of adipogenic differentiation of intramuscular preadipocyte in goat.
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Affiliation(s)
- Qing Xu
- School of Life Science and Technology, Southwest Minzu University, Chengdu, 610041, China
| | - Sen Lin
- School of Life Science and Technology, Southwest Minzu University, Chengdu, 610041, China
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Exploitation, Southwest Minzu University, Chengdu, 610041, Sichuan, China
| | - Yong Wang
- School of Life Science and Technology, Southwest Minzu University, Chengdu, 610041, China.
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Exploitation, Southwest Minzu University, Chengdu, 610041, Sichuan, China.
| | - Jiangjiang Zhu
- School of Life Science and Technology, Southwest Minzu University, Chengdu, 610041, China
- Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Reservation and Exploitation, Southwest Minzu University, Chengdu, 610041, Sichuan, China
| | - Yaqiu Lin
- School of Life Science and Technology, Southwest Minzu University, Chengdu, 610041, China.
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24
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Dou C, Liu Z, Tu K, Zhang H, Chen C, Yaqoob U, Wang Y, Wen J, van Deursen J, Sicard D, Tschumperlin D, Zou H, Huang WC, Urrutia R, Shah VH, Kang N. P300 Acetyltransferase Mediates Stiffness-Induced Activation of Hepatic Stellate Cells Into Tumor-Promoting Myofibroblasts. Gastroenterology 2018; 154:2209-2221.e14. [PMID: 29454793 PMCID: PMC6039101 DOI: 10.1053/j.gastro.2018.02.015] [Citation(s) in RCA: 143] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 02/07/2018] [Accepted: 02/08/2018] [Indexed: 12/17/2022]
Abstract
BACKGROUND & AIMS Hepatic stellate cells (HSCs) contribute to desmoplasia and stiffness of liver metastases by differentiating into matrix-producing myofibroblasts. We investigated whether stiffness due to the presence of tumors increases activation of HSCs into myofibroblasts and their tumor-promoting effects, as well as the role of E1A binding protein p300, a histone acetyltransferase that regulates transcription, in these processes. METHODS HSCs were isolated from liver tissues of patients, mice in which the p300 gene was flanked by 2 loxP sites (p300F/F mice), and p300+/+ mice (controls). The HSCs were placed on polyacrylamide gels with precisely defined stiffness, and their activation (differentiation into myofibroblasts) was assessed by immunofluorescence and immunoblot analyses for alpha-smooth muscle actin. In HSCs from mice, the p300 gene was disrupted by cre recombinase. In human HSCs, levels of p300 were knocked down with small hairpin RNAs or a mutant form of p300 that is not phosphorylated by AKT (p300S1834A) was overexpressed. Human HSCs were also cultured with inhibitors of p300 (C646), PI3K signaling to AKT (LY294002), or RHOA (C3 transferase) and effects on stiffness-induced activation were measured. RNA sequencing and chromatin immunoprecipitation-quantitative polymerase chain reaction were used to identify HSC genes that changed expression levels in response to stiffness. We measured effects of HSC-conditioned media on proliferation of HT29 colon cancer cells and growth of tumors following subcutaneous injection of these cells into mice. MC38 colon cancer cells were injected into portal veins of p300F/Fcre and control mice, and liver metastases were measured. p300F/Fcre and control mice were given intraperitoneal injections of CCl4 to induce liver fibrosis. Liver tissues were collected and analyzed by immunofluorescence, immunoblot, and histology. RESULTS Substrate stiffness was sufficient to activate HSCs, leading to nuclear accumulation of p300. Disrupting p300 level or activity blocked stiffness-induced activation of HSCs. In HSCs, substrate stiffness activated AKT signaling via RHOA to induce phosphorylation of p300 at serine 1834; this caused p300 to translocate to the nucleus, where it up-regulated transcription of genes that increase activation of HSCs and metastasis, including CXCL12. MC38 cells, injected into portal veins, formed fewer metastases in livers of p300F/Fcre mice than control mice. Expression of p300 was increased in livers of mice following injection of CCl4; HSC activation and collagen deposition were reduced in livers of p300F/Fcre mice compared with control mice. CONCLUSIONS In studies of mice, we found liver stiffness to activate HSC differentiation into myofibroblasts, which required nuclear accumulation of p300. p300 increases HSC expression of genes that promote metastasis.
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Affiliation(s)
- Changwei Dou
- GI Research Unit and Cancer Cell Biology Program, Mayo Clinic, Rochester, MN,Department of Hepatobiliary Surgery, 1st Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China,Department of Hepatobiliary Surgery, Zhejiang provincial People's Hospital, Hangzhou, China
| | - Zhikui Liu
- GI Research Unit and Cancer Cell Biology Program, Mayo Clinic, Rochester, MN,Department of Hepatobiliary Surgery, 1st Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Kangsheng Tu
- Department of Hepatobiliary Surgery, 1st Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China,Tumor Microenvironment and Metastasis, Hormel Institute, University of Minnesota
| | - Hongbin Zhang
- Tumor Microenvironment and Metastasis, Hormel Institute, University of Minnesota
| | - Chen Chen
- Tumor Microenvironment and Metastasis, Hormel Institute, University of Minnesota
| | - Usman Yaqoob
- GI Research Unit and Cancer Cell Biology Program, Mayo Clinic, Rochester, MN
| | - Yuanguo Wang
- Tumor Microenvironment and Metastasis, Hormel Institute, University of Minnesota
| | - Jialing Wen
- Tumor Microenvironment and Metastasis, Hormel Institute, University of Minnesota
| | - Jan van Deursen
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN, USA
| | - Delphine Sicard
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, USA
| | - Daniel Tschumperlin
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, USA
| | - Hongzhi Zou
- Guangdong Institute of Gastroenterology, 6th Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Wei-Chien Huang
- Graduate Institute of Biomedical Science, China Medical University, Taiwan, R.O.C
| | - Raul Urrutia
- GI Research Unit and Cancer Cell Biology Program, Mayo Clinic, Rochester, MN
| | - Vijay H. Shah
- GI Research Unit and Cancer Cell Biology Program, Mayo Clinic, Rochester, MN,To whom correspondence should be addressed: Ningling Kang, Ph.D., Hormel Institute, 801 16th Ave NE Austin MN 55912. Fax: (507) 437-9606. Phone: (507) 437-9680. . Vijay Shah, M.D., Mayo Clinic, 200 1st ST SW Rochester MN 55915. Fax: (507) 255-6318. Phone: (507) 255-6028.
| | - Ningling Kang
- Tumor Microenvironment and Metastasis, Hormel Institute, University of Minnesota, Minneapolis, Minnesota.
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25
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Bioinformatics analysis of non-synonymous variants in the KLF genes related to cardiac diseases. Gene 2018; 650:68-76. [DOI: 10.1016/j.gene.2018.01.085] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 10/23/2017] [Accepted: 01/25/2018] [Indexed: 12/25/2022]
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26
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Pollak NM, Hoffman M, Goldberg IJ, Drosatos K. Krüppel-like factors: Crippling and un-crippling metabolic pathways. JACC Basic Transl Sci 2018; 3:132-156. [PMID: 29876529 PMCID: PMC5985828 DOI: 10.1016/j.jacbts.2017.09.001] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 09/05/2017] [Accepted: 09/06/2017] [Indexed: 12/20/2022]
Abstract
Krüppel-like factors (KLFs) are DNA-binding transcriptional factors that regulate various pathways that control metabolism and other cellular mechanisms. Various KLF isoforms have been associated with cellular, organ or systemic metabolism. Altered expression or activation of KLFs has been linked to metabolic abnormalities, such as obesity and diabetes, as well as with heart failure. In this review article we summarize the metabolic functions of KLFs, as well as the networks of different KLF isoforms that jointly regulate metabolism in health and disease.
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Affiliation(s)
- Nina M. Pollak
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, Queensland, Australia
| | - Matthew Hoffman
- Metabolic Biology Laboratory, Center for Translational Medicine, Department of Pharmacology, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania
| | - Ira J. Goldberg
- Division of Endocrinology, Diabetes and Metabolism, New York University School of Medicine, New York, New York
| | - Konstantinos Drosatos
- Metabolic Biology Laboratory, Center for Translational Medicine, Department of Pharmacology, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania
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27
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Drinane MC, Yaqoob U, Yu H, Luo F, Greuter T, Arab JP, Kostallari E, Verma VK, Maiers J, De Assuncao TM, Simons M, Mukhopadhyay D, Kisseleva T, Brenner DA, Urrutia R, Lomberk G, Gao Y, Ligresti G, Tschumperlin DJ, Revzin A, Cao S, Shah VH. Synectin promotes fibrogenesis by regulating PDGFR isoforms through distinct mechanisms. JCI Insight 2017; 2:92821. [PMID: 29263300 DOI: 10.1172/jci.insight.92821] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Accepted: 11/22/2017] [Indexed: 12/30/2022] Open
Abstract
The scaffold protein synectin plays a critical role in the trafficking and regulation of membrane receptor pathways. As platelet-derived growth factor receptor (PDGFR) is essential for hepatic stellate cell (HSC) activation and liver fibrosis, we sought to determine the role of synectin on the PDGFR pathway and development of liver fibrosis. Mice with deletion of synectin from HSC were found to be protected from liver fibrosis. mRNA sequencing revealed that knockdown of synectin in HSC demonstrated reductions in the fibrosis pathway of genes, including PDGFR-β. Chromatin IP assay of the PDGFR-β promoter upon synectin knockdown revealed a pattern of histone marks associated with decreased transcription, dependent on p300 histone acetyltransferase. Synectin knockdown was found to downregulate PDGFR-α protein levels, as well, but through an alternative mechanism: protection from autophagic degradation. Site-directed mutagenesis revealed that ubiquitination of specific PDGFR-α lysine residues was responsible for its autophagic degradation. Furthermore, functional studies showed decreased PDGF-dependent migration and proliferation of HSC after synectin knockdown. Finally, human cirrhotic livers demonstrated increased synectin protein levels. This work provides insight into differential transcriptional and posttranslational mechanisms of synectin regulation of PDGFRs, which are critical to fibrogenesis.
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Affiliation(s)
- Mary C Drinane
- Gastroenterology Research Unit, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
| | - Usman Yaqoob
- Gastroenterology Research Unit, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
| | - Haibin Yu
- Gastroenterology Research Unit, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA.,Beijing Youan Hospital, Capital Medical University, Beijing, China
| | - Fanghong Luo
- Gastroenterology Research Unit, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA.,Medical College, Xiamen University, Xiamen, Fujian, China
| | - Thomas Greuter
- Gastroenterology Research Unit, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
| | - Juan P Arab
- Gastroenterology Research Unit, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
| | - Enis Kostallari
- Gastroenterology Research Unit, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
| | - Vikas K Verma
- Gastroenterology Research Unit, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
| | - Jessica Maiers
- Gastroenterology Research Unit, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
| | - Thiago Milech De Assuncao
- Gastroenterology Research Unit, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
| | - Michael Simons
- Section of Cardiovascular Medicine, Yale University, New Haven, Connecticut, USA
| | - Debabrata Mukhopadhyay
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Jacksonville, Florida, USA
| | | | | | - Raul Urrutia
- Gastroenterology Research Unit, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
| | - Gwen Lomberk
- Gastroenterology Research Unit, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
| | - Yandong Gao
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
| | - Giovanni Ligresti
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
| | - Daniel J Tschumperlin
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
| | - Alexander Revzin
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
| | - Sheng Cao
- Gastroenterology Research Unit, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
| | - Vijay H Shah
- Gastroenterology Research Unit, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
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28
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Argmann CA, Violante S, Dodatko T, Amaro MP, Hagen J, Gillespie VL, Buettner C, Schadt EE, Houten SM. Germline deletion of Krüppel-like factor 14 does not increase risk of diet induced metabolic syndrome in male C57BL/6 mice. Biochim Biophys Acta Mol Basis Dis 2017; 1863:3277-3285. [DOI: 10.1016/j.bbadis.2017.09.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 09/21/2017] [Accepted: 09/25/2017] [Indexed: 01/03/2023]
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29
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Wang L, Tong X, Gu F, Zhang L, Chen W, Cheng X, Xie L, Chang Y, Zhang H. The KLF14 transcription factor regulates hepatic gluconeogenesis in mice. J Biol Chem 2017; 292:21631-21642. [PMID: 29123026 DOI: 10.1074/jbc.ra117.000184] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 11/01/2017] [Indexed: 12/17/2022] Open
Abstract
Krüppel-like factor 14 (KLF14) is a member of the Cys2/His2 zinc-finger DNA-binding proteins. Despite strong evidence showing that a polymorphism in the Klf14 gene is closely linked to the development of type 2 diabetes, the physiological and metabolic functions of KLF14 still remain unclear. In the present study, we investigated the role of KLF14 in the regulation of hepatic gluconeogenesis. Adenoviruses expressing KLF14 (Ad-Klf14) or KLF14-specific shRNAs (Ad-shKlf14) were injected into normal C57BL/6J, db/db diabetic, or high-fat diet-induced obese (DIO) mice. Gene expression, hepatic glucose production, glucose tolerance, and insulin resistance were tested in C57BL/6J, db/db, and DIO mice and primary hepatocytes. Our results demonstrate that KLF14 expression is induced in the livers of normal C57BL/6J mice upon fasting and significantly up-regulated in the livers of db/db mice, suggesting a physiological link between KLF14 and gluconeogenesis. Adenovirus-mediated overexpression of KLF14 in primary hepatocytes increased both the mRNA and protein levels of peroxisome proliferator-activated receptor-γ coactivator 1α (Pgc-1α, also known as Ppargc1a), thereby stimulating cellular glucose production. Conversely, knockdown of KLF14 expression led to a reduction in PGC-1α, subsequently inhibiting glucose output in primary hepatocytes. Finally, forced expression of KLF14 in the livers of normal mice increased the plasma glucose levels and impaired glucose tolerance; in contrast, KLF14 knockdown in diabetic mouse livers improved glucose tolerance. Taken together, our data strongly indicate that KLF14 modulates hepatic gluconeogenesis.
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Affiliation(s)
- Lu Wang
- From the Department of Biochemistry and Molecular Biology, School of Basic Medicine, Anhui Medical University, Hefei 230032
| | - Xin Tong
- From the Department of Biochemistry and Molecular Biology, School of Basic Medicine, Anhui Medical University, Hefei 230032
| | - Fang Gu
- From the Department of Biochemistry and Molecular Biology, School of Basic Medicine, Anhui Medical University, Hefei 230032
| | - Lei Zhang
- the National Laboratory of Medical Molecular Biology, Institute of Basic Medical Science, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100005
| | - Wei Chen
- the Department of General Surgery, First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230032
| | - Xiaowen Cheng
- the Department of Clinical Laboratory, First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230032, and
| | - Liwei Xie
- the State Key Laboratory of Applied Microbiology in Southern China, Guangdong Institute of Microbiology, Guangzhou 510070, China
| | - Yongsheng Chang
- the National Laboratory of Medical Molecular Biology, Institute of Basic Medical Science, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100005,
| | - Huabing Zhang
- From the Department of Biochemistry and Molecular Biology, School of Basic Medicine, Anhui Medical University, Hefei 230032,
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30
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Kim CK, He P, Bialkowska AB, Yang VW. SP and KLF Transcription Factors in Digestive Physiology and Diseases. Gastroenterology 2017; 152:1845-1875. [PMID: 28366734 PMCID: PMC5815166 DOI: 10.1053/j.gastro.2017.03.035] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 03/21/2017] [Accepted: 03/24/2017] [Indexed: 12/14/2022]
Abstract
Specificity proteins (SPs) and Krüppel-like factors (KLFs) belong to the family of transcription factors that contain conserved zinc finger domains involved in binding to target DNA sequences. Many of these proteins are expressed in different tissues and have distinct tissue-specific activities and functions. Studies have shown that SPs and KLFs regulate not only physiological processes such as growth, development, differentiation, proliferation, and embryogenesis, but pathogenesis of many diseases, including cancer and inflammatory disorders. Consistently, these proteins have been shown to regulate normal functions and pathobiology in the digestive system. We review recent findings on the tissue- and organ-specific functions of SPs and KLFs in the digestive system including the oral cavity, esophagus, stomach, small and large intestines, pancreas, and liver. We provide a list of agents under development to target these proteins.
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Affiliation(s)
- Chang-Kyung Kim
- Department of Medicine, Stony Brook University School of Medicine, Stony Brook, NY
| | - Ping He
- Department of Medicine, Stony Brook University School of Medicine, Stony Brook, NY
| | - Agnieszka B. Bialkowska
- Department of Medicine, Stony Brook University School of Medicine, Stony Brook, NY,Corresponding Authors: Vincent W. Yang & Agnieszka B. Bialkowska, Department of Medicine, Stony Brook University School of Medicine, HSC T-16, Rm. 020; Stony Brook, NY, USA. Tel: (631) 444-2066; Fax: (631) 444-3144; ;
| | - Vincent W. Yang
- Department of Medicine, Stony Brook University School of Medicine, Stony Brook, NY,Department of Physiology and Biophysics, Stony Brook University School of Medicine, Stony Brook, NY,Corresponding Authors: Vincent W. Yang & Agnieszka B. Bialkowska, Department of Medicine, Stony Brook University School of Medicine, HSC T-16, Rm. 020; Stony Brook, NY, USA. Tel: (631) 444-2066; Fax: (631) 444-3144; ;
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31
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Wang R, Ding Q, De Assuncao TM, Mounajjed T, Maiers JL, Dou C, Cao S, Yaqoob U, Huebert RC, Shah VH. Hepatic Stellate Cell Selective Disruption of Dynamin-2 GTPase Increases Murine Fibrogenesis through Up-Regulation of Sphingosine-1 Phosphate-Induced Cell Migration. THE AMERICAN JOURNAL OF PATHOLOGY 2016; 187:134-145. [PMID: 27840081 PMCID: PMC5225297 DOI: 10.1016/j.ajpath.2016.09.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 08/22/2016] [Accepted: 09/01/2016] [Indexed: 01/04/2023]
Abstract
Dynamin-2 (Dyn2) is implicated in endocytosis of receptor tyrosine kinases, which contribute to hepatic stellate cell (HSC) activation and liver fibrosis. A point mutation converting lysine 44 of Dyn2 to alanine (Dyn2K44A) disrupts its GTPase activity. We hypothesized that Dyn2K44A expression in HSCs would decrease HSC activation and fibrogenesis in vivo by disrupting receptor tyrosine kinase endocytosis and signaling. Dyn2K44Afl/fl mice were crossed with Collagen1-Cre (Col1Cre) mice to generate offspring with HSC selective expression of Dyn2K44A (Col1Cre/Dyn2K44Afl/fl). Contrary to our hypothesis, Col1Cre/Dyn2K44Afl/fl mice showed increased hepatic fibrosis in response to liver injury. To elucidate mechanisms, we conducted in vitro experiments with HSCs infected with adenoviral vectors encoding LacZ, Dyn2K44A, or Dyn2WT. HSC-expressing Dyn2K44A displayed increased mRNA and protein levels of sphingosine kinase-1 (SK1), an enzyme previously implicated in the pathogenesis of fibrosis. To study the functional effects of Dyn2K44A regulation of SK1, we examined effects of AKT signaling and migration in HSCs. Dyn2K44A promoted both AKT phosphorylation and HSC migration in an SK1-dependent manner. Genetic disruption of Dyn2 GTPase activity selectively in HSC enhances fibrogenesis, driven at least in part through up-regulation of the SK1 pathway and cell migration in HSCs.
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Affiliation(s)
- Ruisi Wang
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester, Minnesota
| | - Qian Ding
- Department of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota
| | - Thiago M De Assuncao
- Department of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota
| | - Taofic Mounajjed
- Laboratory of Anatomic Pathology, Mayo Clinic, Rochester, Minnesota
| | - Jessica L Maiers
- Department of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota
| | - Changwei Dou
- Department of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota
| | - Sheng Cao
- Department of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota
| | - Usman Yaqoob
- Department of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota
| | - Robert C Huebert
- Department of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota
| | - Vijay H Shah
- Department of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota.
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Anunciado-Koza RP, Manuel J, Koza RA. Molecular correlates of fat mass expansion in C57BL/6J mice after short-term exposure to dietary fat. Ann N Y Acad Sci 2015; 1363:50-8. [PMID: 26647164 DOI: 10.1111/nyas.12958] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Heterogeneity of obesity within a population of inbred mice fed an obesogenic high-fat diet (HFD) is associated with changes of gene expression in white adipose tissue (WAT). One gene in particular with large variations among mice, mesoderm-specific transcript (Mest), has been shown to be highly inducible after being fed a short-term HFD, and its expression in WAT before HFD feeding is predictive for susceptibility to the development of obesity. To gain further insight into the association of Mest with rapid changes in body composition, 96 individually housed C57BL/6J mice were fed an HFD for only 2 weeks, resulting in a 12-fold and 90-fold variation in Mest mRNA in visceral epididymal and subcutaneous inguinal WAT, respectively. WAT Mest mRNA was positively associated with interindividual variation of fat mass. Surprisingly, there was only a slight association of WAT Mest with food intake when normalized by body weight or lean mass. In addition, WAT Mest expression coincided highly with the expression of the transcription factor Kruppel-like factor 14 (Klf14), an imprinted gene that regulates lipid metabolism in WAT. Our data suggest that KLF14 transcriptional activity may partially mediate, or act in concert with, MEST as part of an epigenetic mechanism that promotes fat mass accumulation in mice fed an obesogenic diet.
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Affiliation(s)
- Rea P Anunciado-Koza
- Center for Molecular Medicine, Maine Medical Center Research Institute, Scarborough, Maine
| | - Justin Manuel
- Center for Molecular Medicine, Maine Medical Center Research Institute, Scarborough, Maine
| | - Robert A Koza
- Center for Molecular Medicine, Maine Medical Center Research Institute, Scarborough, Maine
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Kong X, Zhang X, Xing X, Zhang B, Hong J, Yang W. The Association of Type 2 Diabetes Loci Identified in Genome-Wide Association Studies with Metabolic Syndrome and Its Components in a Chinese Population with Type 2 Diabetes. PLoS One 2015; 10:e0143607. [PMID: 26599349 PMCID: PMC4657988 DOI: 10.1371/journal.pone.0143607] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 11/06/2015] [Indexed: 12/19/2022] Open
Abstract
Metabolic syndrome (MetS) is prevalent in type 2 diabetes (T2D) patients. The comorbidity of MetS and T2D increases the risk of cardiovascular complications. The aim of the present study was to determine the T2D-related genetic variants that contribute to MetS-related components in T2D patients of Chinese ancestry. We successfully genotyped 25 genome wide association study validated T2D-related single nucleotide polymorphisms (SNPs) among 5,169 T2D individuals and 4,560 normal glycemic controls recruited from the Chinese National Diabetes and Metabolic Disorders Study (DMS). We defined MetS in this population using the harmonized criteria (2009) combined with the Chinese criteria for abdominal obesity. The associations between SNPs and MetS-related components, as well as the associations between SNPs and risk for T2D with or without MetS, were subjected to logistic regression analysis adjusted for age and sex. Results showed that the T2D risk alleles of rs243021 located near BCL11A, rs10830963 in MTNR1B, and rs2237895 in KCNQ1 were related to a lower risk for abdominal obesity in T2D patients (rs243021: 0.92 (0.84, 1.00), P = 4.42 × 10−2; rs10830963: 0.92 (0.85, 1.00), P = 4.07 × 10−2; rs2237895: 0.89 (0.82, 0.98), P = 1.29 × 10−2). The T2D risk alleles of rs972283 near KLF14 contributed to a higher risk of elevated blood pressure (1.10 (1.00, 1.22), P = 4.48 × 10−2), while the T2D risk allele of rs7903146 in TCF7L2 was related to a lower risk for elevated blood pressure (0.74 (0.61, 0.90), P = 2.56 × 10−3). The T2D risk alleles of rs972283 near KLF14 and rs11634397 near ZFAND6 were associated with a higher risk for elevated triglycerides (rs972283: 1.11 (1.02, 1.24), P = 1.46 × 10−2; rs11634397: 1.14 (1.00, 1.29), P = 4.66 × 10−2), while the T2D risk alleles of rs780094 in GCKR and rs7903146 in TCF7L2 were related to a lower risk of elevated triglycerides (rs780094: 0.86 (0.80, 0.93), P = 1.35 × 10−4; rs7903146: 0.82 (0.69, 0.98), P = 3.18 × 10−2). The genotype risk score of the 25 T2D-related SNPs was related to a lower risk for abdominal obesity (Ptrend = 1.29 × 10−2) and lower waist circumference (P = 2.20 × 10−3). Genetic variants of WFS1, CDKAL1, CDKN2BAS, TCF7L2, HHEX, KCNQ1, TSPAN8/LGR5, FTO, and TCF2 were associated with the risk for T2D with MetS, as well as the risk for development of T2D with at least one of the MetS components (P < 0.05). In addition, genetic variants of BCL11A, GCKR, ADAMTS9, CDKAL1, KLF14, CDKN2BAS, TCF7L2, CDC123/CAMK1D, HHEX, MTNR1B, and KCNQ1 contributed to the risk for T2D without MetS (P < 0.05). In conclusion, these findings highlight the contribution of T2D-related genetic loci to MetS in a Chinese Han population. The study also provides insight into the pleotropic effects of genome-wide association loci of diabetes on metabolic regulation.
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Affiliation(s)
- Xiaomu Kong
- Department of Endocrinology, China-Japan Friendship Hospital, Beijing, China
| | - Xuelian Zhang
- Department of Endocrinology, China-Japan Friendship Hospital, Beijing, China
| | - Xiaoyan Xing
- Department of Endocrinology, China-Japan Friendship Hospital, Beijing, China
| | - Bo Zhang
- Department of Endocrinology, China-Japan Friendship Hospital, Beijing, China
| | - Jing Hong
- Department of Endocrinology, China-Japan Friendship Hospital, Beijing, China
| | - Wenying Yang
- Department of Endocrinology, China-Japan Friendship Hospital, Beijing, China
- * E-mail:
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Wang R, Ding Q, Yaqoob U, de Assuncao TM, Verma VK, Hirsova P, Cao S, Mukhopadhyay D, Huebert RC, Shah VH. Exosome Adherence and Internalization by Hepatic Stellate Cells Triggers Sphingosine 1-Phosphate-dependent Migration. J Biol Chem 2015; 290:30684-96. [PMID: 26534962 DOI: 10.1074/jbc.m115.671735] [Citation(s) in RCA: 167] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Indexed: 12/13/2022] Open
Abstract
Exosomes are cell-derived extracellular vesicles thought to promote intercellular communication by delivering specific content to target cells. The aim of this study was to determine whether endothelial cell (EC)-derived exosomes could regulate the phenotype of hepatic stellate cells (HSCs). Initial microarray studies showed that fibroblast growth factor 2 induced a 2.4-fold increase in mRNA levels of sphingosine kinase 1 (SK1). Exosomes derived from an SK1-overexpressing EC line increased HSC migration 3.2-fold. Migration was not conferred by the dominant negative SK1 exosome. Incubation of HSCs with exosomes was also associated with an 8.3-fold increase in phosphorylation of AKT and 2.5-fold increase in migration. Exosomes were found to express the matrix protein and integrin ligand fibronectin (FN) by Western blot analysis and transmission electron microscopy. Blockade of the FN-integrin interaction with a CD29 neutralizing antibody or the RGD peptide attenuated exosome-induced HSC AKT phosphorylation and migration. Inhibition of endocytosis with transfection of dynamin siRNA, the dominant negative dynamin GTPase construct Dyn2K44A, or the pharmacological inhibitor Dynasore significantly attenuated exosome-induced AKT phosphorylation. SK1 levels were increased in serum exosomes derived from mice with experimental liver fibrosis, and SK1 mRNA levels were up-regulated 2.5-fold in human liver cirrhosis patient samples. Finally, S1PR2 inhibition protected mice from CCl4-induced liver fibrosis. Therefore, EC-derived SK1-containing exosomes regulate HSC signaling and migration through FN-integrin-dependent exosome adherence and dynamin-dependent exosome internalization. These findings advance our understanding of EC/HSC cross-talk and identify exosomes as a potential target to attenuate pathobiology signals.
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Affiliation(s)
- Ruisi Wang
- From the Departments of Molecular Pharmacology and Experimental Therapeutics and
| | - Qian Ding
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota 55902
| | - Usman Yaqoob
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota 55902
| | - Thiago M de Assuncao
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota 55902
| | - Vikas K Verma
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota 55902
| | - Petra Hirsova
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota 55902
| | - Sheng Cao
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota 55902
| | | | - Robert C Huebert
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota 55902
| | - Vijay H Shah
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota 55902
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35
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Fan G, Sun L, Shan P, Zhang X, Huan J, Zhang X, Li D, Wang T, Wei T, Zhang X, Gu X, Yao L, Xuan Y, Hou Z, Cui Y, Cao L, Li X, Zhang S, Wang C. Loss of KLF14 triggers centrosome amplification and tumorigenesis. Nat Commun 2015; 6:8450. [PMID: 26439168 PMCID: PMC4600754 DOI: 10.1038/ncomms9450] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Accepted: 08/21/2015] [Indexed: 12/19/2022] Open
Abstract
Centrosome amplification is frequent in cancer, but the underlying mechanisms remain unclear. Here we report that disruption of the Kruppel-like factor 14 (KLF14) gene in mice causes centrosome amplification, aneuploidy and spontaneous tumorigenesis. Molecularly, KLF14 functions as a transcriptional repressor of Plk4, a polo-like kinase whose overexpression induces centrosome overduplication. Transient knockdown of KLF14 is sufficient to induce Plk4-directed centrosome amplification. Clinically, KLF14 transcription is significantly downregulated, whereas Plk4 transcription is upregulated in multiple types of cancers, and there exists an inverse correlation between KLF14 and Plk4 protein expression in human breast and colon cancers. Moreover, KLF14 depletion promotes AOM/DSS-induced colon tumorigenesis. Our findings reveal that KLF14 reduction serves as a mechanism leading to centrosome amplification and tumorigenesis. On the other hand, forced expression of KLF14 leads to mitotic catastrophe. Collectively, our findings identify KLF14 as a tumour suppressor and highlight its potential as biomarker and therapeutic target for cancer.
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Affiliation(s)
- Guangjian Fan
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences, East China Normal University, Shanghai 200241, China.,Institute of Translational Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, No. 650 Xinsongjiang Road, Songjiang District, Shanghai 201620, China
| | - Lianhui Sun
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences, East China Normal University, Shanghai 200241, China.,Institute of Translational Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, No. 650 Xinsongjiang Road, Songjiang District, Shanghai 201620, China
| | - Peipei Shan
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences, East China Normal University, Shanghai 200241, China.,Institute of Translational Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, No. 650 Xinsongjiang Road, Songjiang District, Shanghai 201620, China
| | - Xianying Zhang
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences, East China Normal University, Shanghai 200241, China
| | - Jinliang Huan
- Department of General Surgery, Shanghai Eighth People's Hospital, Shanghai 200235, China
| | - Xiaohong Zhang
- Department of Pathology and Cell Biology, USF Morsani College of Medicine, 12901 Bruce B. Downs Boulevard, Tampa, Florida 33612, USA
| | - Dali Li
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences, East China Normal University, Shanghai 200241, China
| | - Tingting Wang
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences, East China Normal University, Shanghai 200241, China
| | - Tingting Wei
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences, East China Normal University, Shanghai 200241, China
| | - Xiaohong Zhang
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences, East China Normal University, Shanghai 200241, China
| | - Xiaoyang Gu
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences, East China Normal University, Shanghai 200241, China
| | - Liangfang Yao
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences, East China Normal University, Shanghai 200241, China
| | - Yang Xuan
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences, East China Normal University, Shanghai 200241, China
| | - Zhaoyuan Hou
- Department of Biochemistry and Molecular Cell Biology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Yongping Cui
- Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Shanxi 030001, China
| | - Liu Cao
- Key Laboratory of Medical Cell Biology, College of Translational Medicine, China Medical University, Shenyang 110000, China
| | - Xiaotao Li
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences, East China Normal University, Shanghai 200241, China
| | - Shengping Zhang
- Institute of Translational Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, No. 650 Xinsongjiang Road, Songjiang District, Shanghai 201620, China
| | - Chuangui Wang
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences, East China Normal University, Shanghai 200241, China.,Institute of Translational Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, No. 650 Xinsongjiang Road, Songjiang District, Shanghai 201620, China.,Key Laboratory of Medical Cell Biology, College of Translational Medicine, China Medical University, Shenyang 110000, China
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36
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Mathison A, Escande C, Calvo E, Seo S, White T, Salmonson A, Faubion WA, Buttar N, Iovanna J, Lomberk G, Chini EN, Urrutia R. Phenotypic Characterization of Mice Carrying Homozygous Deletion of KLF11, a Gene in Which Mutations Cause Human Neonatal and MODY VII Diabetes. Endocrinology 2015; 156:3581-95. [PMID: 26248217 PMCID: PMC4588811 DOI: 10.1210/en.2015-1145] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We have previously shown that amino acid changes in the human Kruppel-Like Factor (KLF) 11 protein is associated with the development of maturity onset diabetes of the young VII, whereas complete inactivation of this pathway by the -331 human insulin mutation causes neonatal diabetes mellitus. Here, we report that Klf11-/- mice have decreased circulating insulin levels, alterations in the control of blood glucose and body weight, as well as serum dyslipidemia, but do not develop diabetes. Functional assays using ex vivo liver tissue sections demonstrate that Klf11-/- mice display increased insulin sensitivity. Genome-wide experiments validated by pathway-specific quantitative PCR arrays reveal that the Klf11-/- phenotype associates to alterations in the regulation of gene networks involved in lipid metabolism, in particular those regulated by peroxisome proliferator-activated receptor-γ. Combined, these results demonstrate that the major phenotype given by the whole-body deletion of Klf11 in mouse is not diabetes but increased insulin sensitivity, likely due to altered transcriptional regulation in target tissues. The absence of diabetes in the Klf11-/- mouse either indicates an interspecies difference for the role of this transcription factor in metabolic homeostasis between mouse and humans, or potentially highlights the fact that other molecular factors can compensate for its absence. Nevertheless, the data of this study, gathered at the whole-organism level, further support a role for KLF11 in metabolic processes like insulin sensitivity, which regulation is critical in several forms of diabetes.
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Affiliation(s)
- Angela Mathison
- Laboratory of Epigenetics and Chromatin Dynamics (A.M., A.S., W.A.F., N.B., G.L., R.U.), Gastroenterology Research Unit, Departments of Biochemistry and Molecular Biology, Biophysics, Medicine, Epigenomics Translation Program Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905; Metabolic Diseases and Aging Laboratory (C.E.), Institut Pasteur Montevideo, Montevideo 11400, Uruguay; Department of Anesthesia and Robert and Arlene Kogod Center on Aging (C.E., T.W., E.N.C.), Mayo Clinic, Rochester, Minnesota 55905; Endocrinology and Nephrology (E.C.), Centre Hospitalier Universitaire de Québec Research Center and Laval University, Québec, Québec, G1V 4G2, Canada; Lieber Institute for Brain Development (S.S.), Baltimore, Maryland 21205; and Centre de Recherche en Cancérologie de Marseille (J.I.), INSERM U1068, Centre Nationale de la Recherche Scientifique Unité Mixte de Recherche 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, 13288, France
| | - Carlos Escande
- Laboratory of Epigenetics and Chromatin Dynamics (A.M., A.S., W.A.F., N.B., G.L., R.U.), Gastroenterology Research Unit, Departments of Biochemistry and Molecular Biology, Biophysics, Medicine, Epigenomics Translation Program Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905; Metabolic Diseases and Aging Laboratory (C.E.), Institut Pasteur Montevideo, Montevideo 11400, Uruguay; Department of Anesthesia and Robert and Arlene Kogod Center on Aging (C.E., T.W., E.N.C.), Mayo Clinic, Rochester, Minnesota 55905; Endocrinology and Nephrology (E.C.), Centre Hospitalier Universitaire de Québec Research Center and Laval University, Québec, Québec, G1V 4G2, Canada; Lieber Institute for Brain Development (S.S.), Baltimore, Maryland 21205; and Centre de Recherche en Cancérologie de Marseille (J.I.), INSERM U1068, Centre Nationale de la Recherche Scientifique Unité Mixte de Recherche 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, 13288, France
| | - Ezequiel Calvo
- Laboratory of Epigenetics and Chromatin Dynamics (A.M., A.S., W.A.F., N.B., G.L., R.U.), Gastroenterology Research Unit, Departments of Biochemistry and Molecular Biology, Biophysics, Medicine, Epigenomics Translation Program Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905; Metabolic Diseases and Aging Laboratory (C.E.), Institut Pasteur Montevideo, Montevideo 11400, Uruguay; Department of Anesthesia and Robert and Arlene Kogod Center on Aging (C.E., T.W., E.N.C.), Mayo Clinic, Rochester, Minnesota 55905; Endocrinology and Nephrology (E.C.), Centre Hospitalier Universitaire de Québec Research Center and Laval University, Québec, Québec, G1V 4G2, Canada; Lieber Institute for Brain Development (S.S.), Baltimore, Maryland 21205; and Centre de Recherche en Cancérologie de Marseille (J.I.), INSERM U1068, Centre Nationale de la Recherche Scientifique Unité Mixte de Recherche 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, 13288, France
| | - Seungmae Seo
- Laboratory of Epigenetics and Chromatin Dynamics (A.M., A.S., W.A.F., N.B., G.L., R.U.), Gastroenterology Research Unit, Departments of Biochemistry and Molecular Biology, Biophysics, Medicine, Epigenomics Translation Program Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905; Metabolic Diseases and Aging Laboratory (C.E.), Institut Pasteur Montevideo, Montevideo 11400, Uruguay; Department of Anesthesia and Robert and Arlene Kogod Center on Aging (C.E., T.W., E.N.C.), Mayo Clinic, Rochester, Minnesota 55905; Endocrinology and Nephrology (E.C.), Centre Hospitalier Universitaire de Québec Research Center and Laval University, Québec, Québec, G1V 4G2, Canada; Lieber Institute for Brain Development (S.S.), Baltimore, Maryland 21205; and Centre de Recherche en Cancérologie de Marseille (J.I.), INSERM U1068, Centre Nationale de la Recherche Scientifique Unité Mixte de Recherche 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, 13288, France
| | - Thomas White
- Laboratory of Epigenetics and Chromatin Dynamics (A.M., A.S., W.A.F., N.B., G.L., R.U.), Gastroenterology Research Unit, Departments of Biochemistry and Molecular Biology, Biophysics, Medicine, Epigenomics Translation Program Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905; Metabolic Diseases and Aging Laboratory (C.E.), Institut Pasteur Montevideo, Montevideo 11400, Uruguay; Department of Anesthesia and Robert and Arlene Kogod Center on Aging (C.E., T.W., E.N.C.), Mayo Clinic, Rochester, Minnesota 55905; Endocrinology and Nephrology (E.C.), Centre Hospitalier Universitaire de Québec Research Center and Laval University, Québec, Québec, G1V 4G2, Canada; Lieber Institute for Brain Development (S.S.), Baltimore, Maryland 21205; and Centre de Recherche en Cancérologie de Marseille (J.I.), INSERM U1068, Centre Nationale de la Recherche Scientifique Unité Mixte de Recherche 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, 13288, France
| | - Ann Salmonson
- Laboratory of Epigenetics and Chromatin Dynamics (A.M., A.S., W.A.F., N.B., G.L., R.U.), Gastroenterology Research Unit, Departments of Biochemistry and Molecular Biology, Biophysics, Medicine, Epigenomics Translation Program Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905; Metabolic Diseases and Aging Laboratory (C.E.), Institut Pasteur Montevideo, Montevideo 11400, Uruguay; Department of Anesthesia and Robert and Arlene Kogod Center on Aging (C.E., T.W., E.N.C.), Mayo Clinic, Rochester, Minnesota 55905; Endocrinology and Nephrology (E.C.), Centre Hospitalier Universitaire de Québec Research Center and Laval University, Québec, Québec, G1V 4G2, Canada; Lieber Institute for Brain Development (S.S.), Baltimore, Maryland 21205; and Centre de Recherche en Cancérologie de Marseille (J.I.), INSERM U1068, Centre Nationale de la Recherche Scientifique Unité Mixte de Recherche 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, 13288, France
| | - William A Faubion
- Laboratory of Epigenetics and Chromatin Dynamics (A.M., A.S., W.A.F., N.B., G.L., R.U.), Gastroenterology Research Unit, Departments of Biochemistry and Molecular Biology, Biophysics, Medicine, Epigenomics Translation Program Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905; Metabolic Diseases and Aging Laboratory (C.E.), Institut Pasteur Montevideo, Montevideo 11400, Uruguay; Department of Anesthesia and Robert and Arlene Kogod Center on Aging (C.E., T.W., E.N.C.), Mayo Clinic, Rochester, Minnesota 55905; Endocrinology and Nephrology (E.C.), Centre Hospitalier Universitaire de Québec Research Center and Laval University, Québec, Québec, G1V 4G2, Canada; Lieber Institute for Brain Development (S.S.), Baltimore, Maryland 21205; and Centre de Recherche en Cancérologie de Marseille (J.I.), INSERM U1068, Centre Nationale de la Recherche Scientifique Unité Mixte de Recherche 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, 13288, France
| | - Navtej Buttar
- Laboratory of Epigenetics and Chromatin Dynamics (A.M., A.S., W.A.F., N.B., G.L., R.U.), Gastroenterology Research Unit, Departments of Biochemistry and Molecular Biology, Biophysics, Medicine, Epigenomics Translation Program Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905; Metabolic Diseases and Aging Laboratory (C.E.), Institut Pasteur Montevideo, Montevideo 11400, Uruguay; Department of Anesthesia and Robert and Arlene Kogod Center on Aging (C.E., T.W., E.N.C.), Mayo Clinic, Rochester, Minnesota 55905; Endocrinology and Nephrology (E.C.), Centre Hospitalier Universitaire de Québec Research Center and Laval University, Québec, Québec, G1V 4G2, Canada; Lieber Institute for Brain Development (S.S.), Baltimore, Maryland 21205; and Centre de Recherche en Cancérologie de Marseille (J.I.), INSERM U1068, Centre Nationale de la Recherche Scientifique Unité Mixte de Recherche 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, 13288, France
| | - Juan Iovanna
- Laboratory of Epigenetics and Chromatin Dynamics (A.M., A.S., W.A.F., N.B., G.L., R.U.), Gastroenterology Research Unit, Departments of Biochemistry and Molecular Biology, Biophysics, Medicine, Epigenomics Translation Program Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905; Metabolic Diseases and Aging Laboratory (C.E.), Institut Pasteur Montevideo, Montevideo 11400, Uruguay; Department of Anesthesia and Robert and Arlene Kogod Center on Aging (C.E., T.W., E.N.C.), Mayo Clinic, Rochester, Minnesota 55905; Endocrinology and Nephrology (E.C.), Centre Hospitalier Universitaire de Québec Research Center and Laval University, Québec, Québec, G1V 4G2, Canada; Lieber Institute for Brain Development (S.S.), Baltimore, Maryland 21205; and Centre de Recherche en Cancérologie de Marseille (J.I.), INSERM U1068, Centre Nationale de la Recherche Scientifique Unité Mixte de Recherche 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, 13288, France
| | - Gwen Lomberk
- Laboratory of Epigenetics and Chromatin Dynamics (A.M., A.S., W.A.F., N.B., G.L., R.U.), Gastroenterology Research Unit, Departments of Biochemistry and Molecular Biology, Biophysics, Medicine, Epigenomics Translation Program Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905; Metabolic Diseases and Aging Laboratory (C.E.), Institut Pasteur Montevideo, Montevideo 11400, Uruguay; Department of Anesthesia and Robert and Arlene Kogod Center on Aging (C.E., T.W., E.N.C.), Mayo Clinic, Rochester, Minnesota 55905; Endocrinology and Nephrology (E.C.), Centre Hospitalier Universitaire de Québec Research Center and Laval University, Québec, Québec, G1V 4G2, Canada; Lieber Institute for Brain Development (S.S.), Baltimore, Maryland 21205; and Centre de Recherche en Cancérologie de Marseille (J.I.), INSERM U1068, Centre Nationale de la Recherche Scientifique Unité Mixte de Recherche 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, 13288, France
| | - Eduardo N Chini
- Laboratory of Epigenetics and Chromatin Dynamics (A.M., A.S., W.A.F., N.B., G.L., R.U.), Gastroenterology Research Unit, Departments of Biochemistry and Molecular Biology, Biophysics, Medicine, Epigenomics Translation Program Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905; Metabolic Diseases and Aging Laboratory (C.E.), Institut Pasteur Montevideo, Montevideo 11400, Uruguay; Department of Anesthesia and Robert and Arlene Kogod Center on Aging (C.E., T.W., E.N.C.), Mayo Clinic, Rochester, Minnesota 55905; Endocrinology and Nephrology (E.C.), Centre Hospitalier Universitaire de Québec Research Center and Laval University, Québec, Québec, G1V 4G2, Canada; Lieber Institute for Brain Development (S.S.), Baltimore, Maryland 21205; and Centre de Recherche en Cancérologie de Marseille (J.I.), INSERM U1068, Centre Nationale de la Recherche Scientifique Unité Mixte de Recherche 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, 13288, France
| | - Raul Urrutia
- Laboratory of Epigenetics and Chromatin Dynamics (A.M., A.S., W.A.F., N.B., G.L., R.U.), Gastroenterology Research Unit, Departments of Biochemistry and Molecular Biology, Biophysics, Medicine, Epigenomics Translation Program Center for Individualized Medicine, Mayo Clinic, Rochester, Minnesota 55905; Metabolic Diseases and Aging Laboratory (C.E.), Institut Pasteur Montevideo, Montevideo 11400, Uruguay; Department of Anesthesia and Robert and Arlene Kogod Center on Aging (C.E., T.W., E.N.C.), Mayo Clinic, Rochester, Minnesota 55905; Endocrinology and Nephrology (E.C.), Centre Hospitalier Universitaire de Québec Research Center and Laval University, Québec, Québec, G1V 4G2, Canada; Lieber Institute for Brain Development (S.S.), Baltimore, Maryland 21205; and Centre de Recherche en Cancérologie de Marseille (J.I.), INSERM U1068, Centre Nationale de la Recherche Scientifique Unité Mixte de Recherche 7258, Aix-Marseille Université and Institut Paoli-Calmettes, Parc Scientifique et Technologique de Luminy, Marseille, 13288, France
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Guo Y, Fan Y, Zhang J, Lomberk GA, Zhou Z, Sun L, Mathison AJ, Garcia-Barrio MT, Zhang J, Zeng L, Li L, Pennathur S, Willer CJ, Rader DJ, Urrutia R, Chen YE. Perhexiline activates KLF14 and reduces atherosclerosis by modulating ApoA-I production. J Clin Invest 2015; 125:3819-30. [PMID: 26368306 DOI: 10.1172/jci79048] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Accepted: 08/07/2015] [Indexed: 12/20/2022] Open
Abstract
Recent genome-wide association studies have revealed that variations near the gene locus encoding the transcription factor Krüppel-like factor 14 (KLF14) are strongly associated with HDL cholesterol (HDL-C) levels, metabolic syndrome, and coronary heart disease. However, the precise mechanisms by which KLF14 regulates lipid metabolism and affects atherosclerosis remain largely unexplored. Here, we report that KLF14 is dysregulated in the liver of 2 dyslipidemia mouse models. We evaluated the effects of both KLF14 overexpression and genetic inactivation and determined that KLF14 regulates plasma HDL-C levels and cholesterol efflux capacity by modulating hepatic ApoA-I production. Hepatic-specific Klf14 deletion in mice resulted in decreased circulating HDL-C levels. In an attempt to pharmacologically target KLF14 as an experimental therapeutic approach, we identified perhexiline, an approved therapeutic small molecule presently in clinical use to treat angina and heart failure, as a KLF14 activator. Indeed, in WT mice, treatment with perhexiline increased HDL-C levels and cholesterol efflux capacity via KLF14-mediated upregulation of ApoA-I expression. Moreover, perhexiline administration reduced atherosclerotic lesion development in apolipoprotein E-deficient mice. Together, these results provide comprehensive insight into the KLF14-dependent regulation of HDL-C and subsequent atherosclerosis and indicate that interventions that target the KLF14 pathway should be further explored for the treatment of atherosclerosis.
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Krüppel-like factor 14 increases insulin sensitivity through activation of PI3K/Akt signal pathway. Cell Signal 2015; 27:2201-8. [PMID: 26226221 DOI: 10.1016/j.cellsig.2015.07.019] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Revised: 07/19/2015] [Accepted: 07/22/2015] [Indexed: 12/21/2022]
Abstract
Genome-wide association studies (GWAS) have shown that Krüppel-like factor 14 (KLF14) is associated with type 2 diabetes mellitus (T2DM). However, no report has demonstrated a relationship between KLF14 and glucose metabolism. The aim of this study was to determine whether KLF14 is associated with glucose metabolism and insulin signaling in vitro. The mRNA and protein expressions of KLF14 were determined by Real-time PCR and Western blotting. Glucose uptake was assessed by 2-[(3)H]-deoxyglucose (2-DG) uptake. Western blotting was used to identify the activation of insulin signaling proteins. KLF14 mRNA and protein in fat and muscle were significantly decreased in HFD-fed mice, db/db mice and T2DM patients. Overexpression of KLF14 enhanced insulin-stimulated glucose uptake and the activation of Akt kinase in Hepa1-6 cells. The phosphorylation of insulin receptor (InsR), insulin receptor substrate-1(IRS-1), glycogen synthase kinase-3β (GSK-3β) and Akt also elevated significantly by up-regulation of KLF14. KLF14 overexpression in Hepa1-6 cells prevented the inhibition of glucose uptake and Akt phosphorylation induced by high glucose and/or high insulin, or T2DM serum. However, KLF14's ability to increase glucose uptake and Akt activation was significantly attenuated by LY294002, a PI3-kinase inhibitor. These data suggested that KLF14 could increase insulin sensitivity probably through the PI3K/Akt pathway.
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Romero-Guevara R, Cencetti F, Donati C, Bruni P. Sphingosine 1-phosphate signaling pathway in inner ear biology. New therapeutic strategies for hearing loss? Front Aging Neurosci 2015; 7:60. [PMID: 25954197 PMCID: PMC4407579 DOI: 10.3389/fnagi.2015.00060] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Accepted: 04/08/2015] [Indexed: 12/13/2022] Open
Abstract
Hearing loss is one of the most prevalent conditions around the world, in particular among people over 60 years old. Thus, an increase of this affection is predicted as result of the aging process in our population. In this context, it is important to further explore the function of molecular targets involved in the biology of inner ear sensory cells to better individuate new candidates for therapeutic application. One of the main causes of deafness resides into the premature death of hair cells and auditory neurons. In this regard, neurotrophins and growth factors such as insulin like growth factor are known to be beneficial by favoring the survival of these cells. An elevated number of published data in the last 20 years have individuated sphingolipids not only as structural components of biological membranes but also as critical regulators of key biological processes, including cell survival. Ceramide, formed by catabolism of sphingomyelin (SM) and other complex sphingolipids, is a strong inducer of apoptotic pathway, whereas sphingosine 1-phosphate (S1P), generated by cleavage of ceramide to sphingosine and phosphorylation catalyzed by two distinct sphingosine kinase (SK) enzymes, stimulates cell survival. Interestingly S1P, by acting as intracellular mediator or as ligand of a family of five distinct S1P receptors (S1P1–S1P5), is a very powerful bioactive sphingolipid, capable of triggering also other diverse cellular responses such as cell migration, proliferation and differentiation, and is critically involved in the development and homeostasis of several organs and tissues. Although new interesting data have become available, the information on S1P pathway and other sphingolipids in the biology of the inner ear is limited. Nonetheless, there are several lines of evidence implicating these signaling molecules during neurogenesis in other cell populations. In this review, we discuss the role of S1P during inner ear development, also as guidance for future studies.
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Affiliation(s)
- Ricardo Romero-Guevara
- Department Scienze Biomediche Sperimentali e Cliniche "Mario Serio", University of Florence Firenze, Italy
| | - Francesca Cencetti
- Department Scienze Biomediche Sperimentali e Cliniche "Mario Serio", University of Florence Firenze, Italy
| | - Chiara Donati
- Department Scienze Biomediche Sperimentali e Cliniche "Mario Serio", University of Florence Firenze, Italy
| | - Paola Bruni
- Department Scienze Biomediche Sperimentali e Cliniche "Mario Serio", University of Florence Firenze, Italy
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Simmen RCM, Heard ME, Simmen AM, Montales MTM, Marji M, Scanlon S, Pabona JMP. The Krüppel-like factors in female reproductive system pathologies. J Mol Endocrinol 2015; 54:R89-R101. [PMID: 25654975 PMCID: PMC4369192 DOI: 10.1530/jme-14-0310] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Female reproductive tract pathologies arise largely from dysregulation of estrogen and progesterone receptor signaling, leading to aberrant cell proliferation, survival, and differentiation. The signaling pathways orchestrated by these nuclear receptors are complex, require the participation of many nuclear proteins serving as key binding partners or targets, and involve a range of paracrine and autocrine regulatory circuits. The members of the Krüppel-like factor (KLF) family of transcription factors are ubiquitously expressed in reproductive tissues and have been increasingly implicated as critical co-regulators and integrators of steroid hormone actions. Herein, we explore the involvement of KLF family members in uterine pathology, describe their currently known molecular mechanisms, and discuss their potential as targets for therapeutic intervention.
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Affiliation(s)
- Rosalia C M Simmen
- Department of Physiology and BiophysicsUniversity of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USADepartment of Obstetrics and GynecologyUniversity of Michigan Health System, Ann Arbor, Michigan 48109, USADepartment of Internal MedicineHarlem Hospital Center, Columbia University Medical Center, New York, New York 10037, USA
| | - Melissa E Heard
- Department of Physiology and BiophysicsUniversity of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USADepartment of Obstetrics and GynecologyUniversity of Michigan Health System, Ann Arbor, Michigan 48109, USADepartment of Internal MedicineHarlem Hospital Center, Columbia University Medical Center, New York, New York 10037, USA
| | - Angela M Simmen
- Department of Physiology and BiophysicsUniversity of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USADepartment of Obstetrics and GynecologyUniversity of Michigan Health System, Ann Arbor, Michigan 48109, USADepartment of Internal MedicineHarlem Hospital Center, Columbia University Medical Center, New York, New York 10037, USA
| | - Maria Theresa M Montales
- Department of Physiology and BiophysicsUniversity of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USADepartment of Obstetrics and GynecologyUniversity of Michigan Health System, Ann Arbor, Michigan 48109, USADepartment of Internal MedicineHarlem Hospital Center, Columbia University Medical Center, New York, New York 10037, USA
| | - Meera Marji
- Department of Physiology and BiophysicsUniversity of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USADepartment of Obstetrics and GynecologyUniversity of Michigan Health System, Ann Arbor, Michigan 48109, USADepartment of Internal MedicineHarlem Hospital Center, Columbia University Medical Center, New York, New York 10037, USA
| | - Samantha Scanlon
- Department of Physiology and BiophysicsUniversity of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USADepartment of Obstetrics and GynecologyUniversity of Michigan Health System, Ann Arbor, Michigan 48109, USADepartment of Internal MedicineHarlem Hospital Center, Columbia University Medical Center, New York, New York 10037, USA
| | - John Mark P Pabona
- Department of Physiology and BiophysicsUniversity of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USADepartment of Obstetrics and GynecologyUniversity of Michigan Health System, Ann Arbor, Michigan 48109, USADepartment of Internal MedicineHarlem Hospital Center, Columbia University Medical Center, New York, New York 10037, USA
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Abstract
BACKGROUND AND AIMS KLF proteins function as epigenetic reprogramming factors during cell differentiation in many cell populations and in engineered iPS cells. In this study, we determined KLF14 function in the regulation of FOXP3, a transcription factor critical for Treg cell differentiation. METHODS We studied the effects of KLF14 on FOXP3 expression at the level of the protein and mRNA. We evaluated the functional relevance of KLF14 to FOXP3+ Treg cells in vitro and in vivo through suppression assays and two colitis models. Finally, we analyzed the effect of KLF14 on the epigenetic landscape of the FOXP3 promoter locus through chromatin immuno-precipitation. RESULTS KLF14, induced upon activation of naïve CD4+ T cells, segregates to the FOXP3- population and is inversely associated with FOXP3 expression and Treg function. KLF14 KO CD4+ cells differentiated into adaptive Tregs more readily in vitro and in vivo. KLF14 KO cells demonstrated enhanced Treg suppressor function in vitro and in vivo. KLF14 repressed FOXP3 at the level of the mRNA and protein, and by ChIP assay KLF14 was found to bind to the TSDR enhancer region of FOXP3. Furthermore, loss of KLF14 reduced the levels of H3K9me3, HP1 and Suv39H1at the TSDR. CONCLUSIONS These results outline a novel mechanism by which KLF14 regulates Treg cell differentiation via chromatin remodeling at the FOXP3 TSDR. To our knowledge, this is the first evidence supporting a role for KLF14 in maintaining the differentiated state of Treg cells and outlines a potential mechanism to modify the expression of immune genes, such as FOXP3, which are critical to T cell fate.
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