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Jiang J, Xu J, Ou L, Yin C, Wang Y, Shi B. ITM2A inhibits the progression of bladder cancer by downregulating the phosphorylation of STAT3. Am J Cancer Res 2024; 14:2202-2215. [PMID: 38859860 PMCID: PMC11162684 DOI: 10.62347/khcc9690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Accepted: 04/29/2024] [Indexed: 06/12/2024] Open
Abstract
Bladder cancer stands as one of the prevalent malignancies in urological clinics, highlighting the pressing need to uncover prognostic or therapeutic avenues. ITM2A, a transmembrane protein, has been identified as a suppressor in tumor progression recently. Our study underscored a significant correlation between low ITM2A expression in bladder cancer tissues and high tumor grade, AJCC stage, and poor overall survival time. Additionally, our findings demonstrated that reinstating ITM2A expression impeded cell proliferation, migration, and invasion, while conversely, its suppression enhanced these malignant behaviors. Furthermore, we elucidated that ITM2A could suppress malignant phenotypes of bladder cancer cells via inhibiting activation of the STAT3 induced by IL-6. In conclusion, our research unveiled the mechanistic role of ITM2A in inhibiting tumor progression, shedding light on its potential as a prognostic predictor and therapeutic target in bladder cancer management.
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Affiliation(s)
- Jiahao Jiang
- Department of Urology, Shenzhen Second People’s Hospital, Clinical College of Anhui Medical UniversityShenzhen, Guangdong, P. R. China
- The Fifth Clinical Medical College of Anhui Medical UniversityHefei, Anhui, P. R. China
- Department of Urology, Shenzhen Second People’s Hospital/The First Affiliated Hospital of Shenzhen UniversityShenzhen, Guangdong, P. R. China
| | - Jinming Xu
- Department of Urology, Shenzhen Second People’s Hospital/The First Affiliated Hospital of Shenzhen UniversityShenzhen, Guangdong, P. R. China
| | - Longhua Ou
- Department of Urology, Shenzhen Second People’s Hospital/The First Affiliated Hospital of Shenzhen UniversityShenzhen, Guangdong, P. R. China
| | - Cong Yin
- Department of Urology, Shenzhen Second People’s Hospital/The First Affiliated Hospital of Shenzhen UniversityShenzhen, Guangdong, P. R. China
| | - Yan Wang
- Department of Urology, Peking University Shenzhen Hospital, Institute of Urology, Shenzhen PKU-HKUST Medical CenterShenzhen, Guangdong, P. R. China
| | - Bentao Shi
- Department of Urology, Shenzhen Second People’s Hospital, Clinical College of Anhui Medical UniversityShenzhen, Guangdong, P. R. China
- The Fifth Clinical Medical College of Anhui Medical UniversityHefei, Anhui, P. R. China
- Department of Urology, Shenzhen Second People’s Hospital/The First Affiliated Hospital of Shenzhen UniversityShenzhen, Guangdong, P. R. China
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Maternal high-fat diet programs white and brown adipose tissue lipidome and transcriptome in offspring in a sex- and tissue-dependent manner in mice. Int J Obes (Lond) 2022; 46:831-842. [PMID: 34997206 PMCID: PMC8960419 DOI: 10.1038/s41366-021-01060-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 12/10/2021] [Accepted: 12/22/2021] [Indexed: 02/06/2023]
Abstract
Objective The prevalence of overweight and obesity among children has drastically increased during the last decades and maternal obesity has been demonstrated as one of the ultimate factors. Nutrition-stimulated transgenerational regulation of key metabolic genes is fundamental to the developmental origins of the metabolic syndrome. Fetal nutrition may differently influence female and male offspring. Methods Mice dam were fed either a control diet or a high-fat diet (HFD) for 6-week prior mating and continued their respective diet during gestation and lactation. At weaning, female and male offspring were fed the HFD until sacrifice. White (WAT) and brown (BAT) adipose tissues were investigated in vivo by nuclear magnetic resonance at two different timepoints in life (midterm and endterm) and tissues were collected at endterm for lipidomic analysis and RNA sequencing. We explored the sex-dependent metabolic adaptation and gene programming changes by maternal HFD in visceral AT (VAT), subcutaneous AT (SAT) and BAT of offspring. Results We show that the triglyceride profile varies between adipose depots, sexes and maternal diet. In female offspring, maternal HFD remodels the triglycerides profile in SAT and BAT, and increases thermogenesis and cell differentiation in BAT, which may prevent metabolic complication later in life. Male offspring exhibit whitening of BAT and hyperplasia in VAT when born from high-fat mothers, with impaired metabolic profile. Maternal HFD differentially programs gene expression in WAT and BAT of female and male offspring. Conclusion Maternal HFD modulates metabolic profile in offspring in a sex-dependent manner. A sex- and maternal diet-dependent gene programming exists in VAT, SAT, and BAT which may be key player in the sexual dimorphism in the metabolic adaptation later in life.
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Preclinical Advances of Therapies for Laminopathies. J Clin Med 2021; 10:jcm10214834. [PMID: 34768351 PMCID: PMC8584472 DOI: 10.3390/jcm10214834] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 10/19/2021] [Accepted: 10/19/2021] [Indexed: 11/29/2022] Open
Abstract
Laminopathies are a group of rare disorders due to mutation in LMNA gene. Depending on the mutation, they may affect striated muscles, adipose tissues, nerves or are multisystemic with various accelerated ageing syndromes. Although the diverse pathomechanisms responsible for laminopathies are not fully understood, several therapeutic approaches have been evaluated in patient cells or animal models, ranging from gene therapies to cell and drug therapies. This review is focused on these therapies with a strong focus on striated muscle laminopathies and premature ageing syndromes.
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Kim HS, Ren G, Kim T, Bhatnagar S, Yang Q, Bahk YY, Kim JA. Metformin reduces saturated fatty acid-induced lipid accumulation and inflammatory response by restoration of autophagic flux in endothelial cells. Sci Rep 2020; 10:13523. [PMID: 32782332 PMCID: PMC7419289 DOI: 10.1038/s41598-020-70347-w] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Accepted: 07/03/2020] [Indexed: 02/06/2023] Open
Abstract
Autophagy, an integral part of the waste recycling process, plays an important role in cellular physiology and pathophysiology. Impaired autophagic flux causes ectopic lipid deposition, which is defined as the accumulation of lipids in non-adipose tissue. Ectopic lipid accumulation is observed in patients with cardiometabolic syndrome, including obesity, diabetes, insulin resistance, and cardiovascular complications. Metformin is the first line of treatment for type 2 diabetes, and one of the underlying mechanisms for the anti-diabetic effect of metformin is mediated by the stimulation of AMP-activated protein kinase (AMPK). Because the activation of AMPK is crucial for the initiation of autophagy, we hypothesize that metformin reduces the accumulation of lipid droplets by increasing autophagic flux in vascular endothelial cells. Incubation of vascular endothelial cells with saturated fatty acid (SFA) increased the accumulation of lipid droplets and impaired autophagic flux. We observed that the accumulation of lipid droplets was reduced, and the autophagic flux was enhanced by treatment with metformin. The knock-down of AMPKα by using siRNA blunted the effect of metformin. Furthermore, treatment with SFA or inhibition of autophagy increased leukocyte adhesion, whereas treatment with metformin decreased the SFA-induced leukocyte adhesion. The results suggest a novel mechanism by which metformin protects vascular endothelium from SFA-induced ectopic lipid accumulation and pro-inflammatory responses. In conclusion, improving autophagic flux may be a therapeutic strategy to protect endothelial function from dyslipidemia and diabetic complications.
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Affiliation(s)
- Hae-Suk Kim
- Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, Comprehensive Diabetes Center, University of Alabama at Birmingham, 1825 University Blvd, Birmingham, AL, 35294, USA
| | - Guang Ren
- Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, Comprehensive Diabetes Center, University of Alabama at Birmingham, 1825 University Blvd, Birmingham, AL, 35294, USA
| | - Teayoun Kim
- Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, Comprehensive Diabetes Center, University of Alabama at Birmingham, 1825 University Blvd, Birmingham, AL, 35294, USA
| | - Sushant Bhatnagar
- Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, Comprehensive Diabetes Center, University of Alabama at Birmingham, 1825 University Blvd, Birmingham, AL, 35294, USA
| | - Qinglin Yang
- Department of Nutrition, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Young Yil Bahk
- Department of Biotechnology, College of Biomedical and Health Science, Konkuk University, Chungju, 27478, Republic of Korea
| | - Jeong-A Kim
- Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, Comprehensive Diabetes Center, University of Alabama at Birmingham, 1825 University Blvd, Birmingham, AL, 35294, USA.
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Urinary Cell Transcriptome Profiling and Identification of ITM2A, SLAMF6, and IKZF3 as Biomarkers of Acute Rejection in Human Kidney Allografts. Transplant Direct 2020; 6:e588. [PMID: 32766436 PMCID: PMC7377920 DOI: 10.1097/txd.0000000000001035] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 06/16/2020] [Indexed: 01/08/2023] Open
Abstract
Identification of a shared gene expression pattern between T cell–mediated rejection (TCMR) and antibody-mediated rejection (AMR) in human kidney allografts may help prioritize targets for the treatment of both types of acute rejection.
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