1
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Sultana T, Mou SI, Chatterjee D, Faruk MO, Hosen MI. Computational exploration of SLC14A1 genetic variants through structure modeling, protein-ligand docking, and molecular dynamics simulation. Biochem Biophys Rep 2024; 38:101703. [PMID: 38596408 PMCID: PMC11001776 DOI: 10.1016/j.bbrep.2024.101703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 03/27/2024] [Accepted: 03/28/2024] [Indexed: 04/11/2024] Open
Abstract
The urea transporter UT-B1, encoded by the SLC14A1 gene, has been hypothesized to be a significant protein whose deficiency and dysfunction contribute to the pathogenesis of bladder cancer and many other diseases. Several studies reported the association of genetic alterations in the SLC14A1 (UT-B1) gene with bladder carcinogenesis, suggesting a need for thorough characterization of the UT-B1 protein's coding and non-coding variants. This study used various computational techniques to investigate the commonly occurring germ-line missense and non-coding SNPs (ncSNPs) of the SLC14A1 gene (UT-B1) for their structural, functional, and molecular implications for disease susceptibility and dysfunctionality. SLC14A1 missense variants, primarily identified from the ENSEMBL genome browser, were screened through twelve functionality prediction tools leading to two variants D280Y (predicted detrimental by maximum tools) and D280N (high global MAF) for rs1058396. Subsequently, the ConSurf and NetSurf tools revealed the D280 residue to be in a variable site and exposed on the protein surface. According to I-Mutant2.0 and MUpro, both variants are predicted to cause a significant effect on protein stability. Analysis of molecular docking anticipated these two variants to decrease the binding affinity of UT-B1 protein for the examined ligands to a significant extent. Molecular dynamics also disclosed the possible destabilization of the UT-B1 protein due to single nucleotide polymorphism compared to wild-type protein which may result in impaired protein function. Furthermore, several non-coding SNPs were estimated to affect transcription factor binding and regulation of SLC14A1 gene expression. Additionally, two ncSNPs were found to affect miRNA-based post-transcriptional regulation by creating new seed regions for miRNA binding. This comprehensive in-silico study of SLC14A1 gene variants may serve as a springboard for future large-scale investigations examining SLC14A1 polymorphisms.
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Affiliation(s)
- Tamanna Sultana
- Department of Biochemistry and Molecular Biology, University of Dhaka, Dhaka-1000, Bangladesh
| | - Sadia Islam Mou
- Department of Biochemistry and Molecular Biology, University of Dhaka, Dhaka-1000, Bangladesh
| | - Dipankor Chatterjee
- Department of Biochemistry and Molecular Biology, University of Dhaka, Dhaka-1000, Bangladesh
| | - Md. Omar Faruk
- Department of Biochemistry and Molecular Biology, University of Dhaka, Dhaka-1000, Bangladesh
| | - Md. Ismail Hosen
- Department of Biochemistry and Molecular Biology, University of Dhaka, Dhaka-1000, Bangladesh
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2
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Qian J, Zhang Q, Cao Y, Chu X, Gao Y, Xu H, Cai H, Wu J. Perfusion drugs for non‑muscle invasive bladder cancer (Review). Oncol Lett 2024; 27:267. [PMID: 38659423 PMCID: PMC11040539 DOI: 10.3892/ol.2024.14400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Accepted: 04/02/2024] [Indexed: 04/26/2024] Open
Abstract
The high recurrence rate and poor prognosis of non-muscle invasive bladder cancer (BC) are challenges that need to be urgently addressed. Transurethral cystectomy for bladder tumors is often combined with bladder perfusion therapy, which can effectively reduce the recurrence and progression rates of BC. The present review integrated and analyzed currently available bladder perfusion drugs, mainly including chemotherapeutic agents, immunotherapeutic agents and other adjuvant perfusion drugs. Bacillus Calmette-Guerin (BCG) perfusion was the pioneering immunotherapy for early BC and still ranks high in the selection of perfusion drugs. However, BCG infusion has a high toxicity profile and has been shown to be ineffective in some patients. Due to the limitations of BCG, new bladder perfusion drugs are constantly being developed. Immunotherapeutic agents have opened a whole new chapter in the selection of therapeutic agents for bladder perfusion. The present review explored the mechanism of action, clinical dosage and adverse effects of a variety of bladder perfusion drugs currently in common use, described combined perfusion and compared the effects of certain drugs on BC.
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Affiliation(s)
- Jingyuan Qian
- Department of Nursing, Jiangsu Cancer Hospital and The Affiliated Cancer Hospital of Nanjing Medical University and Jiangsu Institute of Cancer Research, Nanjing, Jiangsu 210009, P.R. China
| | - Qiuchen Zhang
- Department of Urology, Jiangsu Cancer Hospital and The Affiliated Cancer Hospital of Nanjing Medical University and Jiangsu Institute of Cancer Research, Nanjing, Jiangsu 210009, P.R. China
| | - Yang Cao
- Department of Urology, Jiangsu Cancer Hospital and The Affiliated Cancer Hospital of Nanjing Medical University and Jiangsu Institute of Cancer Research, Nanjing, Jiangsu 210009, P.R. China
| | - Xi Chu
- Department of Urology, Jiangsu Cancer Hospital and The Affiliated Cancer Hospital of Nanjing Medical University and Jiangsu Institute of Cancer Research, Nanjing, Jiangsu 210009, P.R. China
| | - Yiyang Gao
- Department of Urology, Jiangsu Cancer Hospital and The Affiliated Cancer Hospital of Nanjing Medical University and Jiangsu Institute of Cancer Research, Nanjing, Jiangsu 210009, P.R. China
| | - Haifei Xu
- Department of Urology, Nantong Tumor Hospital, Nantong, Jiangsu 226006, P.R. China
| | - Hongzhou Cai
- Department of Urology, Jiangsu Cancer Hospital and The Affiliated Cancer Hospital of Nanjing Medical University and Jiangsu Institute of Cancer Research, Nanjing, Jiangsu 210009, P.R. China
| | - Jiajia Wu
- Department of Nursing, Jiangsu Cancer Hospital and The Affiliated Cancer Hospital of Nanjing Medical University and Jiangsu Institute of Cancer Research, Nanjing, Jiangsu 210009, P.R. China
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3
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Ali W, Xiao W, Jacobs D, Kajdacsy-Balla A. Survival and Enrichment Analysis of Epithelial-Mesenchymal Transition Genes in Bladder Urothelial Carcinoma. Genes (Basel) 2023; 14:1899. [PMID: 37895248 PMCID: PMC10606556 DOI: 10.3390/genes14101899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 09/16/2023] [Accepted: 09/26/2023] [Indexed: 10/29/2023] Open
Abstract
The escalating prevalence of bladder cancer, particularly urothelial carcinoma, necessitates innovative approaches for prognosis and therapy. This study delves into the significance of genes related to epithelial-mesenchymal transition (EMT), a process inherently linked to carcinogenesis and comparatively better studied in other cancers. We examined 1184 EMT-related gene expression levels in bladder urothelial cancer cases through the TCGA dataset. Genes shown to be differentially expressed in relation to survival underwent further network and enrichment analysis to uncover how they might shape disease outcomes. Our in silico analysis revealed a subset of 32 genes, including those significantly represented in biological pathways such as VEGF signaling and bacterium response. In addition, these genes interact with genes involved in the JAK-STAT signaling pathway. Additionally, some of those 32 genes have been linked to immunomodulators such as chemokines CCL15 and CCL18, as well as to various immune cell infiltrates. Our findings highlight the prognostic utility of various EMT-related genes and identify possible modulators of their effect on survival, allowing for further targeted wet lab research and possible therapeutic intervention.
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Affiliation(s)
- Waleed Ali
- Albert Einstein College of Medicine, New York, NY 10461, USA; (W.X.); (D.J.)
| | - Weirui Xiao
- Albert Einstein College of Medicine, New York, NY 10461, USA; (W.X.); (D.J.)
| | - Daniel Jacobs
- Albert Einstein College of Medicine, New York, NY 10461, USA; (W.X.); (D.J.)
| | - Andre Kajdacsy-Balla
- Professor of Pathology, University of Illinois at Chicago College of Medicine, Chicago, IL 60607, USA;
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4
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Huang L, Xie Q, Deng J, Wei WF. The role of cancer-associated fibroblasts in bladder cancer progression. Heliyon 2023; 9:e19802. [PMID: 37809511 PMCID: PMC10559166 DOI: 10.1016/j.heliyon.2023.e19802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Revised: 08/26/2023] [Accepted: 09/01/2023] [Indexed: 10/10/2023] Open
Abstract
Cancer-associated fibroblasts (CAFs) are key stromal cells in the tumor microenvironment (TME) that critically contribute to cancer initiation and progression. In bladder cancer (BCa), there is emerging evidence that BCa CAFs are actively involved in cancer cell proliferation, invasion, metastasis, and chemotherapy resistance. This review outlines the present knowledge of BCa CAFs, with a particular emphasis on their origin and function in BCa progression, and provides further insights into their clinical application.
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Affiliation(s)
- Long Huang
- Department of Urology, Zhuhai People's Hospital (Zhuhai Hospital Affiliated with Jinan University), Zhuhai, Guangdong, China
| | - Qun Xie
- Department of Urology, Zhuhai People's Hospital (Zhuhai Hospital Affiliated with Jinan University), Zhuhai, Guangdong, China
| | - Jian Deng
- Department of Urology, Zhuhai People's Hospital (Zhuhai Hospital Affiliated with Jinan University), Zhuhai, Guangdong, China
| | - Wen-Fei Wei
- Department of Gynecology, Zhuhai People's Hospital (Zhuhai Hospital Affiliated with Jinan University), Zhuhai, Guangdong, China
- Department of Obstetrics and Gynaecology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
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5
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Huang T, Chen S, Ding K, Zheng B, Lv W, Wang X, Zhong Y, Huang H, Zhang X, Ma S, Yang B, Wang X, Rong Z. SLC35E1 promotes keratinocyte proliferation in psoriasis by regulating zinc homeostasis. Cell Death Dis 2023; 14:354. [PMID: 37296095 PMCID: PMC10256760 DOI: 10.1038/s41419-023-05874-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 05/04/2023] [Accepted: 05/31/2023] [Indexed: 06/12/2023]
Abstract
Keratinocyte hyperproliferation is a key pathogenic factor in psoriasis. However, the mechanisms that regulate keratinocyte hyperproliferation in this condition remain unclear. Here, we found that SLC35E1 was highly expressed in keratinocytes of patients with psoriasis and that Slc35e1-/- mice displayed a less severe imiquimod (IMQ)-induced psoriasis-like phenotype than their wild-type siblings. In addition, SLC35E1 deficiency inhibited keratinocyte proliferation in both mice and cultured cells. On a molecular level, SLC35E1 was found to regulate zinc ion concentrations and subcellular localization, while zinc ion chelation reversed the IMQ-induced psoriatic phenotype in Slc35e1-/- mice. Meanwhile, epidermal zinc ion levels were decreased in patients with psoriasis and zinc ion supplementation alleviated the psoriatic phenotype in an IMQ-induced mouse model of psoriasis. Our results indicated that SLC35E1 can promote keratinocyte proliferation by regulating zinc ion homeostasis and zinc ion supplementation has potential as a therapy for psoriasis.
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Affiliation(s)
- Tao Huang
- Cancer Research Institute, School of Basic Medical Sciences, State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Disease, Key Laboratory of Organ Failure Research (Ministry of Education), Southern Medical University, Guangzhou, 510515, China
- Dermatology Hospital, Southern Medical University, Guangzhou, 510091, China
| | - Shijun Chen
- Cancer Research Institute, School of Basic Medical Sciences, State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Disease, Key Laboratory of Organ Failure Research (Ministry of Education), Southern Medical University, Guangzhou, 510515, China
| | - Ke Ding
- Cancer Research Institute, School of Basic Medical Sciences, State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Disease, Key Laboratory of Organ Failure Research (Ministry of Education), Southern Medical University, Guangzhou, 510515, China
- Dermatology Hospital, Southern Medical University, Guangzhou, 510091, China
| | - Baoqing Zheng
- Dermatology Hospital, Southern Medical University, Guangzhou, 510091, China
| | - Weiqi Lv
- Dermatology Hospital, Southern Medical University, Guangzhou, 510091, China
| | - Xiaobo Wang
- Dermatology Hospital, Southern Medical University, Guangzhou, 510091, China
| | - Yadan Zhong
- Dermatology Hospital, Southern Medical University, Guangzhou, 510091, China
| | - Hongxin Huang
- Dermatology Hospital, Southern Medical University, Guangzhou, 510091, China
| | - Xin Zhang
- Cancer Research Institute, School of Basic Medical Sciences, State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Disease, Key Laboratory of Organ Failure Research (Ministry of Education), Southern Medical University, Guangzhou, 510515, China
- Affiliated Dongguan Hospital, Southern Medical University, (Dongguan People's Hospital), Dongguan, 523058, China
| | - Shufeng Ma
- Cancer Research Institute, School of Basic Medical Sciences, State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Disease, Key Laboratory of Organ Failure Research (Ministry of Education), Southern Medical University, Guangzhou, 510515, China
- Department of Nephrology, Shenzhen Hospital, Southern Medical University, Shenzhen, 518110, China
| | - Bin Yang
- Dermatology Hospital, Southern Medical University, Guangzhou, 510091, China.
| | - Xiaohua Wang
- Dermatology Hospital, Southern Medical University, Guangzhou, 510091, China.
| | - Zhili Rong
- Cancer Research Institute, School of Basic Medical Sciences, State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Disease, Key Laboratory of Organ Failure Research (Ministry of Education), Southern Medical University, Guangzhou, 510515, China.
- Dermatology Hospital, Southern Medical University, Guangzhou, 510091, China.
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6
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Chan TC, Shiue YL, Li CF. The biological impacts of CEBPD on urothelial carcinoma development and progression. Front Oncol 2023; 13:1123776. [PMID: 36776299 PMCID: PMC9914172 DOI: 10.3389/fonc.2023.1123776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 01/05/2023] [Indexed: 01/28/2023] Open
Abstract
Urothelial carcinoma (UC), which includes urinary bladder urothelial carcinoma (UBUC) and upper tract urothelial carcinoma (UTUC), is one of the most common malignancies worldwide. Accordingly, a comprehensive understanding of the underlying mechanism governing UC development is compulsory. Aberrant CCAAT/enhancer-binding protein delta (CEBPD), a transcription factor, displays an oncogene or tumor suppressor depending on tumor type and microenvironments. However, CEBPD has been reported to possess a clear oncogenic function in UC through multiple regulation pathways. Genomic amplification of CEBPD triggered by MYC-driven genome instability is frequently examined in UC that drives CEBPD overexpression. Upregulated CEBPD transcriptionally suppresses FBXW7 to stabilize MYC protein and further induces hexokinase II (HK2)-related aerobic glycolysis that fuels cell growth. Apart from the MYC-dependent pathway, CEBPD also downregulates the level of hsa-miR-429 to enhance HK2-associated glycolysis and induce angiogenesis driven by vascular endothelial growth factor A (VEGFA). Additionally, aggressive UC is attributed to the tumor metastasis regulated by CEBPD-induced matrix metalloproteinase-2 (MMP2) overexpression. Furthermore, elevated CEBPD induced by cisplatin (CDDP) is identified to have dual functions, namely, CDDP-induced chemotherapy resistance or drive CDDP-induced antitumorigenesis. Given that the role of CEBPD in UC is getting clear but pending a more systemic reappraisal, this review aimed to comprehensively discuss the underlying mechanism of CEBPD in UC tumorigenesis.
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Affiliation(s)
- Ti-Chun Chan
- Department of Medical Research, Chi Mei Medical Center, Tainan, Taiwan,National Health Research Institutes, National Institute of Cancer Research, Tainan, Taiwan
| | - Yow-Ling Shiue
- Institute of Precision Medicine, National Sun Yat-Sen University, Kaohsiung, Taiwan,*Correspondence: Yow-Ling Shiue, ; Chien-Feng Li,
| | - Chien-Feng Li
- Department of Medical Research, Chi Mei Medical Center, Tainan, Taiwan,National Health Research Institutes, National Institute of Cancer Research, Tainan, Taiwan,Department of Clinical Medicine, Chi Mei Medical Center, Tainan, Taiwan,*Correspondence: Yow-Ling Shiue, ; Chien-Feng Li,
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7
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Ye B, Ding K, Li K, Zhu Q. Study on the role of SLC14A1 gene in biochemical recurrence of prostate cancer. Sci Rep 2022; 12:17064. [PMID: 36257969 DOI: 10.1038/s41598-022-20775-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 09/19/2022] [Indexed: 12/30/2022] Open
Abstract
Prostate cancer (PCa) is a common malignant disease among men and biochemical recurrence (BCR) is considered to be a decisive risk factor for clinical recurrence and PCa metastasis. Clarifying the genes related to BCR and its possible pathways is vital for providing diagnosis and treatment methods to delay the progress of BCR. An analysis of data concerning PCa from previous datasets of The Cancer Genome Atlas (TCGA) and the Gene Expression Omnibus (GEO) was performed. Immunohistochemical (IHC) staining were used to evaluate the expression of SLC14A1 in prostate tissues. Kaplan-Meier analysis, Pearson correlation, and single sample Gene Set Enrichment Analysis (ssGSEA) were used to identify the potential pathway and molecular mechanism of the function of SLC14A1 in BCR of PCa. The expression of SLC14A1 is significantly reduced in prostate cancer cells and tissue comparing to normal prostate epithelial cell and para-cancerous tissue. As indicated by Kaplan-Meier analysis, High expression of SLC14A1 could increase the BCR-free survival time of PCa patients. This effect might be related to the interaction with miRNAs (has-miR-508, has-mir-514a2, and has-mir-449a) and the infiltration of B cells. SLC14A1 is a novel important gene associated with BCR of PCa, and further studies of its molecular mechanism may delay the progress of BCR.
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8
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Wu S, Xu J, Zhang M, Lu X, Wang K, Sun S, Wang Y, Wu J. Analysis of Genetic Variants and the ceRNA Network of miR-9 in Non-Small Cell Lung Cancer. DNA Cell Biol 2022; 41:142-150. [PMID: 35143342 DOI: 10.1089/dna.2021.0549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Objective: To explore the role of single-nucleotide polymorphisms (SNPs) in hsa-miR-9 in non-small cell lung cancer (NSCLC). Methods: Log-rank and Cox regression analyses were conducted to assess the association of four functional SNPs of miR-9 with overall survival (OS) of Chinese patients with NSCLC. A reporter luciferase assay was performed to examine the relationship between the SNPs and transcriptional activity of miR-9. The expression of miR-9 in cells was detected by quantitative real-time PCR assay. Xenograft model was established in nude mice, which were treated with Lv-MiR-9-mimics or Lv-miR-9-inhibitor. A long noncoding RNA (lncRNA)-miR-9-messenger RNA (mRNA) competing endogenous RNA (ceRNA) network was established based on bioinformatics analyses. Results: We found that rs1501672 was associated with the prognosis of 1001 Chinese NSCLC patients (A>G, additive model: adjusted hazard ratio = 0.89, 95% confidence interval = 0.79-1.00, p = 0.056). Luciferase reporter assay showed higher luciferase activity with wild A allele than that with mutant G allele in 293T, SPC-A1, and A549 cell lines. The miR-9 level was significantly higher in lung cancer cells than normal lung cells. miR-9 was also over expressed in lung cancer tissue according to The Cancer Genome Atlas and gene expression omnibus databases. Xenograft models based on H1299 cells showed that lv-miR-9-inhibitor significantly decreased tumor growth compared with the lv-miR-9-NC group (p < 0.001). Bioinformatics analysis showed that one target gene leukemia inhibitory factor receptor and two lncRNAs (KIAA0087 and GVINP1) were associated with OS of NSCLC patients. Conclusion: The rs1501672 of miR-9 was associated with the prognosis of NSCLC patients in the Chinese population. The lncRNA-miR-9-mRNA ceRNA network revealed potential molecular biological regulation pathways and prognostic biomarkers for NSCLC.
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Affiliation(s)
- Shuangshuang Wu
- Jiangsu Provincial Key Laboratory of Geriatrics, Department of Geriatrics, the First Affiliated Hospital with Nanjing Medical University, Nanjing, China
| | - Jiali Xu
- Department of Oncology, the First Affiliated Hospital with Nanjing Medical University, Nanjing, China
| | - Mingjiong Zhang
- Jiangsu Provincial Key Laboratory of Geriatrics, Department of Geriatrics, the First Affiliated Hospital with Nanjing Medical University, Nanjing, China
| | - Xiao Lu
- Department of Oncology, Changshu No.1 People's Hospital, Suzhou, China
| | - Kai Wang
- Jiangsu Provincial Key Laboratory of Geriatrics, Department of Geriatrics, the First Affiliated Hospital with Nanjing Medical University, Nanjing, China
| | - Sibo Sun
- Jiangsu Provincial Key Laboratory of Geriatrics, Department of Geriatrics, the First Affiliated Hospital with Nanjing Medical University, Nanjing, China
| | - Yu Wang
- Jiangsu Provincial Key Laboratory of Geriatrics, Department of Geriatrics, the First Affiliated Hospital with Nanjing Medical University, Nanjing, China
| | - Jianqing Wu
- Jiangsu Provincial Key Laboratory of Geriatrics, Department of Geriatrics, the First Affiliated Hospital with Nanjing Medical University, Nanjing, China
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9
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Abstract
This review aims to serve as an introduction to the solute carrier proteins (SLC) superfamily of transporter proteins and their roles in human cells. The SLC superfamily currently includes 458 transport proteins in 65 families that carry a wide variety of substances across cellular membranes. While members of this superfamily are found throughout cellular organelles, this review focuses on transporters expressed at the plasma membrane. At the cell surface, SLC proteins may be viewed as gatekeepers of the cellular milieu, dynamically responding to different metabolic states. With altered metabolism being one of the hallmarks of cancer, we also briefly review the roles that surface SLC proteins play in the development and progression of cancer through their influence on regulating metabolism and environmental conditions.
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Affiliation(s)
- Mattia D. Pizzagalli
- CeMM, Research Center for Molecular Medicine of the Austrian Academy of SciencesViennaAustria
| | - Ariel Bensimon
- CeMM, Research Center for Molecular Medicine of the Austrian Academy of SciencesViennaAustria
| | - Giulio Superti‐Furga
- CeMM, Research Center for Molecular Medicine of the Austrian Academy of SciencesViennaAustria
- Center for Physiology and PharmacologyMedical University of ViennaAustria
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10
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Yahouédéhou SCMA, Neres JSDS, da Guarda CC, Carvalho SP, Santiago RP, Figueiredo CVB, Fiuza LM, Ndidi US, de Oliveira RM, Fonseca CA, Nascimento VML, Rocha LC, Adanho CSA, da Rocha TSC, Adorno EV, Goncalves MS. Sickle Cell Anemia: Variants in the CYP2D6, CAT, and SLC14A1 Genes Are Associated With Improved Hydroxyurea Response. Front Pharmacol 2020; 11:553064. [PMID: 33013391 PMCID: PMC7510454 DOI: 10.3389/fphar.2020.553064] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 08/18/2020] [Indexed: 11/13/2022] Open
Abstract
Differences in hydroxyurea response in sickle cell anemia may arise due to a series of factors with genetic factors appearing to be predominant. This study aims to investigate the effects of single nucleotide polymorphisms in genes encoding drug-metabolizing enzymes and solute carriers on hydroxyurea response, in patients with sickle cell anemia. For that purpose, a total number of 90 patients with sickle cell anemia were recruited, 45 were undergoing hydroxyurea treatment, while 45 were not under the treatment. Association analyses were performed between CYP3A4 (rs2740574), CYP2D6 (rs3892097), CAT (rs7943316 and rs1001179), and SLC14A1 (rs2298720) variants and laboratory parameters. According to our findings, patients with hydroxyurea treatment demonstrated higher HbF levels and a significant improvement in hemolytic, hepatic, inflammatory, and lipid parameters in comparison to those without the treatment. We also found significant associations between the CYP2D6 (rs3892097), CAT (rs7943316 and rs1001179), and SLC14A1 (rs2298720) variants and an improvement of the therapeutic effects, specifically the hemolytic, hepatic, inflammatory, lipid, and renal parameters. In conclusion, our results highlight the importance of the investigated variants, and their strong association with hydroxyurea efficacy in patients with sickle cell anemia, which may be considered in the future as genetic markers.
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Affiliation(s)
- Sètondji Cocou Modeste Alexandre Yahouédéhou
- Laboratório de Investigação em Genética e Hematologia Translacional, Instituto Gonçalo Moniz, Salvador, Brazil.,Laboratório de Pesquisa em Anemia, Departamento de Análises Clínicas, Faculdade de Farmácia, Universidade Federal da Bahia, Salvador, Brazil
| | | | - Caroline Conceição da Guarda
- Laboratório de Investigação em Genética e Hematologia Translacional, Instituto Gonçalo Moniz, Salvador, Brazil.,Laboratório de Pesquisa em Anemia, Departamento de Análises Clínicas, Faculdade de Farmácia, Universidade Federal da Bahia, Salvador, Brazil
| | - Suellen Pinheiro Carvalho
- Laboratório de Investigação em Genética e Hematologia Translacional, Instituto Gonçalo Moniz, Salvador, Brazil.,Laboratório de Pesquisa em Anemia, Departamento de Análises Clínicas, Faculdade de Farmácia, Universidade Federal da Bahia, Salvador, Brazil
| | - Rayra Pereira Santiago
- Laboratório de Investigação em Genética e Hematologia Translacional, Instituto Gonçalo Moniz, Salvador, Brazil.,Laboratório de Pesquisa em Anemia, Departamento de Análises Clínicas, Faculdade de Farmácia, Universidade Federal da Bahia, Salvador, Brazil
| | - Camylla Vilas Boas Figueiredo
- Laboratório de Investigação em Genética e Hematologia Translacional, Instituto Gonçalo Moniz, Salvador, Brazil.,Laboratório de Pesquisa em Anemia, Departamento de Análises Clínicas, Faculdade de Farmácia, Universidade Federal da Bahia, Salvador, Brazil
| | - Luciana Magalhães Fiuza
- Laboratório de Investigação em Genética e Hematologia Translacional, Instituto Gonçalo Moniz, Salvador, Brazil.,Laboratório de Pesquisa em Anemia, Departamento de Análises Clínicas, Faculdade de Farmácia, Universidade Federal da Bahia, Salvador, Brazil
| | | | - Rodrigo Mota de Oliveira
- Laboratório de Investigação em Genética e Hematologia Translacional, Instituto Gonçalo Moniz, Salvador, Brazil.,Laboratório de Pesquisa em Anemia, Departamento de Análises Clínicas, Faculdade de Farmácia, Universidade Federal da Bahia, Salvador, Brazil
| | - Cleverson Alves Fonseca
- Laboratório de Pesquisa em Anemia, Departamento de Análises Clínicas, Faculdade de Farmácia, Universidade Federal da Bahia, Salvador, Brazil
| | | | | | | | | | - Elisângela Vitória Adorno
- Laboratório de Pesquisa em Anemia, Departamento de Análises Clínicas, Faculdade de Farmácia, Universidade Federal da Bahia, Salvador, Brazil
| | - Marilda Souza Goncalves
- Laboratório de Investigação em Genética e Hematologia Translacional, Instituto Gonçalo Moniz, Salvador, Brazil.,Laboratório de Pesquisa em Anemia, Departamento de Análises Clínicas, Faculdade de Farmácia, Universidade Federal da Bahia, Salvador, Brazil
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11
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Chan TC, Wu WJ, Li WM, Shiao MS, Shiue YL, Li CF. SLC14A1 prevents oncometabolite accumulation and recruits HDAC1 to transrepress oncometabolite genes in urothelial carcinoma. Theranostics 2020; 10:11775-11793. [PMID: 33052246 PMCID: PMC7546005 DOI: 10.7150/thno.51655] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 09/13/2020] [Indexed: 01/21/2023] Open
Abstract
Urothelial carcinoma (UC), including upper tract urothelial carcinoma (UTUC) and urinary bladder urothelial carcinoma (UBUC), is a common malignant disease in developed countries. Oncogenic metabolic lesions have been associated with UC development. Methods: Using data mining, a series of studies were performed to study the involvement of SLC14A1 in UC specimens, animal models and UC-derived cell lines. Results: In two cohorts of UTUC (n = 340) and UBUC (n = 295), the SLC14A1 protein level was an independent prognostic factor. Epigenetic silencing contributed to SLC14A1 downregulation in UCs. Total and membranous SLC14A1 played tumor suppressive roles through the inhibition of cell proliferation and metastasis in distinct UC-derived cells and animal models. Functional SLC14A1 prevented the accumulation of arginine and urea, enhanced mitochondrial fusion and aerobic respiration, inhibited glycolysis by altering the expression levels of several related proteins and sensitized arginine-deprivation treatment in ASS1-deficient UC-derived cells. In vitro and in vivo, SLC14A1 inhibited the mTOR signaling pathway and subsequently tumorigenesis, supported by reduced arginine concentrations in vitro. Nuclear SLC14A1 transrepressed HK2 and DEGS1 genes via recruitment of HDAC1 and/or SIN3A to maintain metabolic homeostasis and thereafter impeded tumorigenesis. Conclusion: Clinical associations, animal models and in vitro indications provide solid evidence that the SLC14A1 gene is a novel tumor suppressor in UCs. Total and membranous SLC14A1 prevents urea and arginine accumulation via the mTOR signaling pathway. Nuclear SLC14A1 recruits HDAC1 to transrepress oncometabolite genes.
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Affiliation(s)
- Ti-Chun Chan
- Department of Medical Research, Chi Mei Medical Center, Tainan, Taiwan
- Institute of Biomedical Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
- National Institute of Cancer Research, National Health Research Institutes, Tainan, Taiwan
| | - Wen-Jeng Wu
- Graduate Institute of Clinical Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Urology, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
- Department of Urology, School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
- Cohort Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan, Kaohsiung, Taiwan
- Center for Infectious Disease and Cancer Research, Kaohsiung Medical University, Kaohsiung, Taiwan
- Center for Stem Cell Research, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Wei-Ming Li
- Department of Urology, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
- Department of Urology, School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
- Cohort Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan, Kaohsiung, Taiwan
- Center for Stem Cell Research, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Urology, Ministry of Health and Welfare Pingtung Hospital, Pingtung, Taiwan
| | - Meng-Shin Shiao
- Research Center, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Yow-Ling Shiue
- Institute of Biomedical Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
- Institute of Precision Medicine, National Sun Yat-Sen University, Kaohsiung, Taiwan
| | - Chien-Feng Li
- Department of Medical Research, Chi Mei Medical Center, Tainan, Taiwan
- National Institute of Cancer Research, National Health Research Institutes, Tainan, Taiwan
- Institute of Precision Medicine, National Sun Yat-Sen University, Kaohsiung, Taiwan
- Department of Pathology, School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
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12
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Wang S, Liu J, Cai H, Liu K, He Y, Liu S, Guo Y, Guo L. High salt diet elevates the mean arterial pressure of SLC14α1 gene depletion mice. Life Sci 2020; 254:117751. [PMID: 32387413 DOI: 10.1016/j.lfs.2020.117751] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 04/30/2020] [Accepted: 05/02/2020] [Indexed: 01/01/2023]
Abstract
AIMS Urea transporter B (UTB) is encoded by the SLC14α1 gene, and exerts its activity in the choroid plexus (CP) by regulating [Na+] in the cerebrospinal fluid (CSF) and maintaining normal blood pressure in mice fed on high salt diet. The aim of this study is to investigate the effect of high salt diet on the mean arterial pressure (MAP) in SLC14α1 depletion mice and its possible molecular mechanism. MAIN METHODS Adult male mice were divided into four groups: 1) UTB+/+(wild type) mice + normal salt diet (0.3% NaCl, NS); 2) UTB+/+ mice + high salt diet (8% NaCl, HS); 3) UTB-/- (SLC14α1 knockout) mice + NS; 4) UTB-/- mice + HS, each group consisted of 6 mice. The MAP of mice was measured by non-invasive detection method after HS diet for 4 weeks, followed by euthanization for brain and blood collection. KEY FINDINGS HS significantly elevated the MAP and CSF [Na+] in UTB-/- mice in comparison with wild type mice; however, NS didn't alter the MAP and CSF [Na+] in either wild type mice or UTB-/- mice. HS also induced the expression of ENaC-α and α1-Na+-K+-ATPase in UTB-/- mice as confirmed by RT-PCR and Western blot. SIGNIFICANCE These results suggest that the depletion of SLC14α1 gene in mice may contribute to the HS-induced abnormality of sodium transportation in the CSF, and lead to the elevation of MAP, which eventually promote the development of salt-sensitive hypertension.
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Affiliation(s)
- Song Wang
- Nursing School of Jilin University, Changchun, Jilin 130021, China; Liao Cheng People's Hospital, Liaocheng, Shandong 252000, China
| | - Jinshu Liu
- Nursing School of Jilin University, Changchun, Jilin 130021, China
| | - Hongwei Cai
- Nursing School of Jilin University, Changchun, Jilin 130021, China
| | - Keyuan Liu
- Department of Pathophysiology, Basic College of Medicine, Jilin University, Changchun, Jilin 130021, China
| | - Yayu He
- Nursing School of Jilin University, Changchun, Jilin 130021, China
| | - Shuxiang Liu
- Nursing School of Jilin University, Changchun, Jilin 130021, China
| | - Yingze Guo
- Nursing School of Jilin University, Changchun, Jilin 130021, China
| | - Lirong Guo
- Nursing School of Jilin University, Changchun, Jilin 130021, China.
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13
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Chang C, Sung CY, Hsiao H, Chen J, Chen IH, Kuo WT, Cheng LF, Korla PK, Chung MJ, Wu PJ, Yu CC, Sheu JJC. HDMAC: A Web-Based Interactive Program for High-Dimensional Analysis of Molecular Alterations in Cancer. Sci Rep 2020; 10:3953. [PMID: 32127576 PMCID: PMC7054321 DOI: 10.1038/s41598-020-60791-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 02/12/2020] [Indexed: 12/24/2022] Open
Abstract
Recent advances in high-throughput genomic technologies have nurtured a growing demand for statistical tools to facilitate identification of molecular changes as potential prognostic biomarkers or drugable targets for personalized precision medicine. In this study, we developed a web-based interactive and user-friendly platform for high-dimensional analysis of molecular alterations in cancer (HDMAC) (https://ripsung26.shinyapps.io/rshiny/). On HDMAC, several penalized regression models that are suitable for high-dimensional data analysis, Ridge, Lasso and adaptive Lasso, are offered, with Cox regression for survival and logistic regression for binary outcomes. Choice of a first-step screening is provided to address the multiple-comparison issue that often arises with large-volume genomic data. Hazard ratio or estimated coefficient is provided with each selected gene so that a multivariate regression model may be built based on the genes selected. Cross validation is provided as the method to estimate the prediction power of each regression model. In addition, R codes are also provided to facilitate download of whole sets of molecular variables from TCGA. In this study, illustration of the use of HDMAC was made through a set of data on gene mutations and a set on mRNA expression from ovarian cancer patients and a set on mRNA expression from bladder cancer patient. From the analysis of each set of data, a list of candidate genes was obtained that might be associated with mutations or abnormal expression of genes in ovarian and bladder cancers. HDMAC offers a solution for rigorous and validation analysis of high-dimensional genomic data.
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Affiliation(s)
- Chung Chang
- Department of Applied Mathematics, National Sun Yat-sen University, Kaohsiung, Taiwan, ROC
| | - Chan-Yu Sung
- Department of Applied Mathematics, National Sun Yat-sen University, Kaohsiung, Taiwan, ROC
| | - Han Hsiao
- Department of Applied Mathematics, National Sun Yat-sen University, Kaohsiung, Taiwan, ROC
| | - Jiabin Chen
- Institute of Biomedical Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan, ROC
| | - I-Hsuan Chen
- Division of Transplant Surgery/Urology, Department of Surgery, Kaohsiung Veterans General Hospital, Kaohsiung, 81362, Taiwan, ROC
- Department of Pharmacy, College of Pharmacy and Health Care, Tajen University, Pingtung County, 90741, Taiwan, ROC
- School of Medicine, National Yang-Ming University, Taipei, 112, Taiwan, ROC
| | - Wei-Ting Kuo
- Division of Transplant Surgery/Urology, Department of Surgery, Kaohsiung Veterans General Hospital, Kaohsiung, 81362, Taiwan, ROC
| | - Lung-Feng Cheng
- Division of Transplant Surgery/Urology, Department of Surgery, Kaohsiung Veterans General Hospital, Kaohsiung, 81362, Taiwan, ROC
| | - Praveen Kumar Korla
- Institute of Biomedical Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan, ROC
| | - Ming-Jhe Chung
- Department of Applied Mathematics, National Sun Yat-sen University, Kaohsiung, Taiwan, ROC
| | - Pei-Jhen Wu
- Department of Applied Mathematics, National Sun Yat-sen University, Kaohsiung, Taiwan, ROC
| | - Chia-Cheng Yu
- Division of Transplant Surgery/Urology, Department of Surgery, Kaohsiung Veterans General Hospital, Kaohsiung, 81362, Taiwan, ROC.
- Department of Pharmacy, College of Pharmacy and Health Care, Tajen University, Pingtung County, 90741, Taiwan, ROC.
- School of Medicine, National Yang-Ming University, Taipei, 112, Taiwan, ROC.
- Division of Transplant Surgery/Urology, Department of Surgery, Tri-Service General Hospital, National Defense Medical Center, Taipei, 114, Taiwan, ROC.
| | - Jim Jinn-Chyuan Sheu
- Institute of Biomedical Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan, ROC.
- Department of Biotechnology, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan, ROC.
- School of Chinese Medicine, China Medical University, Taichung, 40402, Taiwan, ROC.
- Department of Health and Nutrition Biotechnology, Asia University, Taichung, 41354, Taiwan, ROC.
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14
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Wang Y, Ma S, Ruzzo WL. Spatial modeling of prostate cancer metabolic gene expression reveals extensive heterogeneity and selective vulnerabilities. Sci Rep 2020; 10:3490. [PMID: 32103057 PMCID: PMC7044328 DOI: 10.1038/s41598-020-60384-w] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 02/11/2020] [Indexed: 01/24/2023] Open
Abstract
Spatial heterogeneity is a fundamental feature of the tumor microenvironment (TME), and tackling spatial heterogeneity in neoplastic metabolic aberrations is critical for tumor treatment. Genome-scale metabolic network models have been used successfully to simulate cancer metabolic networks. However, most models use bulk gene expression data of entire tumor biopsies, ignoring spatial heterogeneity in the TME. To account for spatial heterogeneity, we performed spatially-resolved metabolic network modeling of the prostate cancer microenvironment. We discovered novel malignant-cell-specific metabolic vulnerabilities targetable by small molecule compounds. We predicted that inhibiting the fatty acid desaturase SCD1 may selectively kill cancer cells based on our discovery of spatial separation of fatty acid synthesis and desaturation. We also uncovered higher prostaglandin metabolic gene expression in the tumor, relative to the surrounding tissue. Therefore, we predicted that inhibiting the prostaglandin transporter SLCO2A1 may selectively kill cancer cells. Importantly, SCD1 and SLCO2A1 have been previously shown to be potently and selectively inhibited by compounds such as CAY10566 and suramin, respectively. We also uncovered cancer-selective metabolic liabilities in central carbon, amino acid, and lipid metabolism. Our novel cancer-specific predictions provide new opportunities to develop selective drug targets for prostate cancer and other cancers where spatial transcriptomics datasets are available.
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Affiliation(s)
- Yuliang Wang
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, 98109, USA.
- Paul G. Allen School of Computer Science & Engineering, University of Washington, Seattle, WA, 98195, USA.
| | - Shuyi Ma
- Department of Microbiology, University of Washington, Seattle, WA, 98195, USA
| | - Walter L Ruzzo
- Paul G. Allen School of Computer Science & Engineering, University of Washington, Seattle, WA, 98195, USA
- Department of Genome Sciences, University of Washington School of Medicine, Seattle, WA, 98195, USA
- Fred Hutchinson Cancer Research Center, Seattle, WA, 98102, USA
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15
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Chen S, Chen Y, Zhu Z, Tan H, Lu J, Qin P, Xu L. Identification of the key genes and microRNAs in adult acute myeloid leukemia with FLT3 mutation by bioinformatics analysis. Int J Med Sci 2020; 17:1269-1280. [PMID: 32547322 PMCID: PMC7294926 DOI: 10.7150/ijms.46441] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Accepted: 05/03/2020] [Indexed: 12/11/2022] Open
Abstract
Background: Associated with poor prognosis, FMS-like tyrosine kinase 3 (FLT3) mutation appeared frequently in acute myeloid leukemia (AML). Herein, we aimed to identify the key genes and miRNAs involved in adult AML with FLT3 mutation and find possible therapeutic targets for improving treatment. Materials: Gene and miRNA expression data and survival profiles were obtained from The Cancer Genome Atlas (TCGA) and Gene Expression Omnibus (GEO) database. EdgeR of R platform was applied to identify the differentially expressed genes and miRNAs (DEGs, DE-miRNAs). Gene ontology (GO) and the Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses were performed by Metascape and DAVID. And protein-protein interaction network, miRNA-mRNA regulatory network and clustering modules analyses were performed by STRING database and Cytoscape software. Results: Survival analysis showed FLT3 mutation led to adverse outcome in AML. 24 DE-miRNAs (6 upregulated, 18 downregulated) and 250 DEGs (54 upregulated, 196 downregulated) were identified. Five miRNAs had prognostic value and the results matched their expression levels (miR-1-3p, miR-10a-3p, miR-10a-5p, miR-133a-3p and miR-99b-5p). GO analysis showed DEGs were enriched in skeletal system development, blood vessel development, cartilage development, tissue morphogenesis, cartilage morphogenesis, cell morphogenesis involved in differentiation, response to growth factor, cell-substrate adhesion and so on. The KEGG analysis showed DEGs were enriched in PI3K-Akt signaling pathway, ECM-receptor interaction and focal adhesion. Seven genes (LAMC1, COL3A1, APOB, COL1A2, APP, SPP1 and FSTL1) were simultaneously identified by hub gene analysis and module analysis. SLC14A1, ARHGAP5 and PIK3CA, the target genes of miR-10a-3p, resulted in poor prognosis. Conclusion: Our study successfully identified molecular markers, processes and pathways affected by FLT3 mutation in AML. Furthermore, miR-10a-3p, a novel oncogene, might involve in the development of FLT3 mutation adult AML by targeting SLC14A1, ARHGAP5 and PIK3CA.
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Affiliation(s)
- Shuyi Chen
- Department of Hematology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510000, China.,Department of Urology & Minimally Invasive Surgery center, The First Affiliated Hospital of Guangzhou Medical University, Guangdong Key Laboratory of Urology, Guangzhou Institute of Urology, Guangdong, China
| | - Yimin Chen
- Department of Hematology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510000, China.,Department of Urology & Minimally Invasive Surgery center, The First Affiliated Hospital of Guangzhou Medical University, Guangdong Key Laboratory of Urology, Guangzhou Institute of Urology, Guangdong, China
| | - Zhiguo Zhu
- Department of Urology & Minimally Invasive Surgery center, The First Affiliated Hospital of Guangzhou Medical University, Guangdong Key Laboratory of Urology, Guangzhou Institute of Urology, Guangdong, China
| | - Huo Tan
- Department of Hematology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510000, China
| | - Jielun Lu
- Department of Pediatrics, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510000, China
| | - Pengfei Qin
- Department of Hematology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510000, China
| | - Lihua Xu
- Department of Hematology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510000, China.,Department of Urology & Minimally Invasive Surgery center, The First Affiliated Hospital of Guangzhou Medical University, Guangdong Key Laboratory of Urology, Guangzhou Institute of Urology, Guangdong, China
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16
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Abstract
Facilitative UT-B urea transporters play important physiological roles in numerous tissues, including the urino-genital tract. Previous studies have shown that urothelial UT-B transporters are crucial to bladder function in a variety of mammalian species. Using the RT4 bladder urothelial cell line, this study investigated the potential osmotic regulation of human UT-B transporters. Initial end-point PCR experiments confirmed expression of both UT-B1 and UT-B2 transcripts in RT4 cells. Western blotting analysis revealed glycosylated UT-B protein to be highly abundant and immunolocalization experiments showed it was predominantly located on the plasma membrane. Further PCR experiments suggested that a 48 hr, NaCl-induced raise in external osmolality increased expression of UT-B transcripts. Importantly, these NaCl-induced changes also significantly increased UT-B protein abundance (p < .01, n = 7, ANOVA), whereas mannitol-induced changes in external osmolality had no effect (NS, n = 4, ANOVA). Finally, similar increases in both UT-B RNA expression and protein abundance were observed with urea-induced changes to external osmolality (p < .05, n = 4, ANOVA). In conclusion, these findings strongly suggest that increases in external osmolality, via either NaCl or urea, can regulate human urothelial UT-B transporters.
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Affiliation(s)
- Alan Farrell
- School of Biology & Environmental ScienceScience Centre WestUniversity College DublinDublin 4Ireland
| | - Gavin Stewart
- School of Biology & Environmental ScienceScience Centre WestUniversity College DublinDublin 4Ireland
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