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Chen Z, Jiang Z, Meng L, Wang Y, Lin M, Wei Z, Han W, Ying S, Xu A. SAMHD1, positively regulated by KLF4, suppresses the proliferation of gastric cancer cells through MAPK p38 signaling pathway. Cell Cycle 2022; 21:2065-2078. [PMID: 35670736 DOI: 10.1080/15384101.2022.2085356] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
SAMHD1 was reported to be related with the development of tumors, while its function in gastric cancer (GC) has not been elucidated yet. Here, we investigated the role and mechanism of SAMHD1 in regulating the proliferation of GC, as well as the mechanism of its expression regulation. Our results revealed that SAMHD1 was downregulated in GC tissues and cell lines, which was correlated with tumor size, depth of invasion and TNM stage. Overexpression of SAMHD1 inhibited the proliferation, clone formation, DNA synthesis and cell cycle progression, while knockdown of SAMHD1 promoted the proliferation of GC cells in vitro and vivo. Meanwhile, SAMHD1 inhibited the activation of MAPK p38 signaling pathway. Moreover, SB203580, as a MAPK p38 inhibitor, could reverse the proliferation and activation of MAPK p38 signaling pathway caused by knockdown of SAMHD1 in GC cells. Additionally, transcription factor Krüppel-like factor 4 (KLF4) bound to the core promoter of SAMHD1, increasing its transcriptional expression in GC cells. In conclusion, SAMHD1 suppressed the proliferation of GC through negatively regulating the activation of MAPK p38 signaling pathway and was upregulated by KLF4 in GC cells.
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Affiliation(s)
- Zhangming Chen
- Department of General Surgery, First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China.,Department of General Surgery, Fourth Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Zhe Jiang
- Department of General Surgery, First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China.,Department of Immunology, School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui, China
| | - Lei Meng
- Department of General Surgery, First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Ye Wang
- Department of General Surgery, First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Minggui Lin
- Department of Immunology, School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui, China
| | - Zhijian Wei
- Department of General Surgery, First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Wenxiu Han
- Department of General Surgery, First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Songcheng Ying
- Department of Immunology, School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui, China
| | - Aman Xu
- Department of General Surgery, First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China.,Department of General Surgery, Fourth Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
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Dual roles of SAMHD1 in tumor development and chemoresistance to anticancer drugs. Oncol Lett 2021; 21:451. [PMID: 33907561 PMCID: PMC8063254 DOI: 10.3892/ol.2021.12712] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 03/10/2021] [Indexed: 11/05/2022] Open
Abstract
Human sterile alpha motif and HD-domain-containing protein 1 (SAMHD1) has been identified as a GTP or dGTP-dependent deoxynucleotide triphosphohydrolase (dNTPase) and acts as an antiviral factor against certain retroviruses and DNA viruses. Genetic mutation in SAMHD1 causes the inflammatory Aicardi-Goutières Syndrome and abnormal intracellular deoxyribonucleoside triphosphates (dNTPs) pool. At present, the role of SAMHD1 in numerous types of cancer, such as chronic lymphocytic leukemia, lung cancer and colorectal cancer, is highly studied. Furthermore, it has been found that methylation, acetylation and phosphorylation are involved in the regulation of SAMHD1 expression, and that genetic mutations can cause changes in its activities, including dNTPase activity, long interspersed element type 1 (LINE-1) suppression and DNA damage repair, which could lead to uncontrolled cell cycle progression and cancer development. In addition, SAMHD1 has been reported to have a negative regulatory role in the chemosensitivity to anticancer drugs through its dNTPase activity. The present review aimed to summarize the regulation of SAMHD1 expression in cancer and its function in tumor growth and chemotherapy sensitivity, and discussed controversial points and future directions.
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Suhail Y, Afzal J. Evolved Resistance to Placental Invasion Secondarily Confers Increased Survival in Melanoma Patients. J Clin Med 2021; 10:jcm10040595. [PMID: 33562461 PMCID: PMC7915120 DOI: 10.3390/jcm10040595] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 01/29/2021] [Accepted: 02/02/2021] [Indexed: 12/25/2022] Open
Abstract
Mammals exhibit large differences in rates of cancer malignancy, even though the tumor formation rates may be similar. In placental mammals, rates of malignancy correlate with the extent of placental invasion. Our Evolved Levels of Invasibility (ELI) framework links these two phenomena identifying genes that potentially confer resistance in stromal fibroblasts to limit invasion, from trophoblasts in the endometrium, and from disseminating melanoma in the skin. Herein, using patient data from The Cancer Genome Atlas (TCGA), we report that these anti-invasive genes may be crucial in melanoma progression in human patients, and that their loss is correlated with increased cancer spread and lowered survival. Our results suggest that, surprisingly, these anti-invasive genes, which have lower expression in humans compared to species with non-invasive placentation, may potentially prevent stromal invasion, while a further reduction in their levels increases the malignancy and lethality of melanoma. Our work links evolution, comparative biology, and cancer progression across tissues, indicating new avenues for using evolutionary medicine to prognosticate and treat human cancers.
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Affiliation(s)
- Yasir Suhail
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT 06269, USA;
- Cancer Systems Biology (CaSB@Yale), Yale West Campus, West Haven, CT 06477, USA
- Center for Cell Analysis and Modeling, University of Connecticut Health, Farmington, CT 06032, USA
| | - Junaid Afzal
- Department of Cardiology, University of California, San Francisco, CA 94143, USA;
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Kohart NA, Elshafae SM, Supsahvad W, Alasonyalilar-Demirer A, Panfil AR, Xiang J, Dirksen WP, Veis DJ, Green PL, Weilbaecher KN, Rosol TJ. Mouse model recapitulates the phenotypic heterogeneity of human adult T-cell leukemia/lymphoma in bone. J Bone Oncol 2019; 19:100257. [PMID: 31871882 PMCID: PMC6911918 DOI: 10.1016/j.jbo.2019.100257] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 08/16/2019] [Accepted: 08/19/2019] [Indexed: 11/16/2022] Open
Abstract
Adult T-cell leukemia/lymphoma has a unique relationship to bone including latency in the marrow, and development of bone invasion, osteolytic tumors and humoral hypercalcemia of malignancy. To study these conditions, we established and characterized a novel mouse model of ATL bone metastasis. Patient-derived ATL cell lines including three that do not express HTLV-1 oncoprotein Tax (ATL-ED, RV-ATL, TL-Om1), an in vitro transformed human T-cell line with high Tax expression (HT-1RV), and an HTLV-1 negative T-cell lymphoma (Jurkat) were injected intratibially into NSG mice, and were capable of proliferating and modifying the bone microenvironment. Radiography, μCT, histopathology, immunohistochemistry, plasma calcium concentrations, and qRT-PCR for several tumor-bone signaling mRNAs were performed. Luciferase-positive ATL-ED bone tumors allowed for in vivo imaging and visualization of bone tumor growth and metastasis over time. ATL-ED and HT-1RV cells caused mixed osteolytic/osteoblastic bone tumors, TL-Om1 cells exhibited minimal bone involvement and aggressive local invasion into the adjacent soft tissues, Jurkat cells proliferated within bone marrow and induced minimal bone cell response, and RV-ATL cells caused marked osteolysis. This mouse model revealed important mechanisms of human ATL bone neoplasms and will be useful to investigate biological interactions, potential therapeutic targets, and new bone-targeted agents for the prevention of ATL metastases to bone.
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Key Words
- ATL, adult T-cell leukemia/lymphoma
- Bone resorption
- HHM, humoral hypercalcemia of malignancy
- HTLV-1
- HTLV-1, Human T-cell leukemia virus type 1
- Hbz, HTLV-1 basic zipper protein
- Lymphoma
- Metastasis
- Mouse model
- NK, natural killer
- NOD, non-obese diabetic
- NSG, NOD-scid IL2Rgammanull
- SCID, CB17-Prkdcscid
- Tax, transcriptional activator from the X region
- qRT-PCR, quantitative real-time polymerase chain reaction
- μCT, micro-computed tomography
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Affiliation(s)
- Nicole A. Kohart
- Department of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Said M. Elshafae
- Department of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA
- Department of Radiology, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
- Department of Pathology, Faculty of Veterinary Medicine, Benha University, Kalyubia 3736, Egypt
| | - Wachirapan Supsahvad
- Department of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA
- Department of Pathology, Faculty of Veterinary Medicine, Kasetsart University, Bangkok, Thailand
| | - Aylin Alasonyalilar-Demirer
- Department of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA
- Department of Pathology, Faculty of Veterinary Medicine, Bursa Uludag University, 16059 Bursa, Turkey
| | - Amanda R. Panfil
- Department of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Jingyu Xiang
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Wessel P. Dirksen
- Department of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Deborah J. Veis
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Patrick L. Green
- Department of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Katherine N. Weilbaecher
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Thomas J. Rosol
- Department of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA
- Department of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University, 225 Irvine Hall, Athens, OH 45701, USA
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