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Xu H, Zhang LB, Luo YY, Wang L, Zhang YP, Chen PQ, Ba XY, Han J, Luo H. Synaptotagmins family affect glucose transport in retinal pigment epithelial cells through their ubiquitination-mediated degradation and glucose transporter-1 regulation. World J Diabetes 2024; 15:958-976. [PMID: 38766439 PMCID: PMC11099358 DOI: 10.4239/wjd.v15.i5.958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 01/22/2024] [Accepted: 03/11/2024] [Indexed: 05/10/2024] Open
Abstract
BACKGROUND Synaptotagmins (SYTs) are a family of 17 membrane transporters that function as calcium ion sensors during the release of Ca2+-dependent neurotransmitters and hormones. However, few studies have reported whether members of the SYT family play a role in glucose uptake in diabetic retinopathy (DR) through Ca2+/glucose transporter-1 (GLUT1) and the possible regulatory mechanism of SYTs. AIM To elucidate the role of the SYT family in the regulation of glucose transport in retinal pigment epithelial cells and explore its potential as a therapeutic target for the clinical management of DR. METHODS DR was induced by streptozotocin in C57BL/6J mice and by high glucose medium in human retinal pigment epithelial cells (ARPE-19). Bioinformatics analysis, reverse transcriptase-polymerase chain reaction, Western blot, flow cytometry, ELISA, HE staining, and TUNEL staining were used for analysis. RESULTS Six differentially expressed proteins (SYT2, SYT3, SYT4, SYT7, SYT11, and SYT13) were found between the DR and control groups, and SYT4 was highly expressed. Hyperglycemia induces SYT4 overexpression, manipulates Ca2+ influx to induce GLUT1 fusion with the plasma membrane, promotes abnormal expression of the glucose transporter GLUT1 and excessive glucose uptake, induces ARPE-19 cell apoptosis, and promotes DR progression. Parkin deficiency inhibits the proteasomal degradation of SYT4 in DR, resulting in SYT4 accumulation and enhanced GLUT1 fusion with the plasma membrane, and these effects were blocked by oe-Parkin treatment. Moreover, dysregulation of the myelin transcription factor 1 (Myt1)-induced transcription of SYT4 in DR further activated the SYT4-mediated stimulus-secretion coupling process, and this process was inhibited in the oe-MYT1-treated group. CONCLUSION Our study reveals the key role of SYT4 in regulating glucose transport in retinal pigment epithelial cells during the pathogenesis of DR and the underlying mechanism and suggests potential therapeutic targets for clinical DR.
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Affiliation(s)
- Hong Xu
- Department of Ophthalmology, The People’s Hospital of Chuxiong Yi Autonomous Prefecture & The Fourth Affiliated Hospital of Dali University, Chuxiong Yi Autonomous Prefecture 675000, Yunnan Province, China
| | - Li-Bo Zhang
- Department of Ophthalmology, The People’s Hospital of Chuxiong Yi Autonomous Prefecture & The Fourth Affiliated Hospital of Dali University, Chuxiong Yi Autonomous Prefecture 675000, Yunnan Province, China
| | - Yi-Yi Luo
- Precision Medicine Center of Chuxiong Yi Autonomous Prefecture, The People’s Hospital of Chuxiong Yi Autonomous Prefecture & The Fourth Affiliated Hospital of Dali University, Chuxiong Yi Autonomous Prefecture 675000, Yunnan Province, China
| | - Ling Wang
- Department of Endocrinology, The People’s Hospital of Chuxiong Yi Autonomous Prefecture & The Fourth Affiliated Hospital of Dali University, Chuxiong Yi Autonomous Prefecture 675000, Yunnan Province, China
| | - Ye-Pin Zhang
- Department of Pathology, The People’s Hospital of Chuxiong Yi Autonomous Prefecture & The Fourth Affiliated Hospital of Dali University, Chuxiong Yi Autonomous Prefecture 675000, Yunnan Province, China
| | - Pei-Qi Chen
- Department of Endocrinology, The People’s Hospital of Chuxiong Yi Autonomous Prefecture & The Fourth Affiliated Hospital of Dali University, Chuxiong Yi Autonomous Prefecture 675000, Yunnan Province, China
| | - Xue-Ying Ba
- Precision Medicine Center of Chuxiong Yi Autonomous Prefecture, The People’s Hospital of Chuxiong Yi Autonomous Prefecture & The Fourth Affiliated Hospital of Dali University, Chuxiong Yi Autonomous Prefecture 675000, Yunnan Province, China
| | - Jian Han
- Precision Medicine Center of Chuxiong Yi Autonomous Prefecture, The People’s Hospital of Chuxiong Yi Autonomous Prefecture & The Fourth Affiliated Hospital of Dali University, Chuxiong Yi Autonomous Prefecture 675000, Yunnan Province, China
| | - Heng Luo
- Department of Ophthalmology, The People’s Hospital of Chuxiong Yi Autonomous Prefecture & The Fourth Affiliated Hospital of Dali University, Chuxiong Yi Autonomous Prefecture 675000, Yunnan Province, China
- Precision Medicine Center of Chuxiong Yi Autonomous Prefecture, The People’s Hospital of Chuxiong Yi Autonomous Prefecture & The Fourth Affiliated Hospital of Dali University, Chuxiong Yi Autonomous Prefecture 675000, Yunnan Province, China
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Huang J, Xu W, Huang Q, Chen E, Chen J. SYT7 (synaptotagmin 7) promotes cervical squamous cell carcinoma. Heliyon 2024; 10:e24806. [PMID: 38314285 PMCID: PMC10837561 DOI: 10.1016/j.heliyon.2024.e24806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 01/12/2024] [Accepted: 01/15/2024] [Indexed: 02/06/2024] Open
Abstract
Cervical squamous cell carcinoma (CESC) ranks among the primary contributors to global cancer-associated mortality. However, the role mediated by synaptotagmin 7 (SYT7) in CESC remains unclear. Our study employed immunohistochemistry to assess the level of SYT7 expression in the tissue microarray. Furthermore, lentiviral shRNA transduction was utilized to establish SYT7 knockdown cell line models based on HeLa and SiHa cell lines. The functional impacts of silencing SYT7 expression in vitro were evaluated. A subcutaneous xenograft model was employed to examine the tumorigenic potential of cells with or without SYT7. The content of SYT7 in CESC tissues was significantly elevated compared to adjacent normal tissues. Functionally, silencing SYT7 in HeLa and SiHa cells suppressed cell proliferation, colony formation ability, and apoptosis enhancement. Additionally, cells with suppressed SYT7 also exhibited inhibited cell migration and invasion. In vivo experiments demonstrated the loss of tumorigenic ability in SYT7 knockdown cells and suppressed tumor growth. Quantitative PCR PrimeView PathArray and apoptosis antibody array analyses revealed that upon elimination of SYT7, there was a significant upregulation observed in Caspase 8, TNF-R1 (TNF receptor superfamily member 1A), and HSPA5 (heat shock protein family A [Hsp70] member 5), while TGFBI (transforming growth factor beta-induced), RPL31 (ribosomal protein L31), LUM (lumican), HSDL2 (hydroxysteroid dehydrogenase-like 2), ITGB5 (integrin subunit beta 5), and Smad2 (SMAD family member2) were downregulated. Overall, we have demonstrated the tumor-promoting functions of SYT7 in CESC.
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Affiliation(s)
- Jinbing Huang
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong Road, Nanning, Guangxi, China
| | - Wensheng Xu
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong Road, Nanning, Guangxi, China
| | - Qiaoqiao Huang
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong Road, Nanning, Guangxi, China
| | - Erling Chen
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong Road, Nanning, Guangxi, China
| | - Junying Chen
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of Guangxi Medical University, 6 Shuangyong Road, Nanning, Guangxi, China
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Wang J, Zhao J, Zhao K, Wu S, Chen X, Hu W. The Role of Calcium and Iron Homeostasis in Parkinson's Disease. Brain Sci 2024; 14:88. [PMID: 38248303 PMCID: PMC10813814 DOI: 10.3390/brainsci14010088] [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: 12/11/2023] [Revised: 01/04/2024] [Accepted: 01/09/2024] [Indexed: 01/23/2024] Open
Abstract
Calcium and iron are essential elements that regulate many important processes of eukaryotic cells. Failure to maintain homeostasis of calcium and iron causes cell dysfunction or even death. PD (Parkinson's disease) is the second most common neurological disorder in humans, for which there are currently no viable treatment options or effective strategies to cure and delay progression. Pathological hallmarks of PD, such as dopaminergic neuronal death and intracellular α-synuclein deposition, are closely involved in perturbations of iron and calcium homeostasis and accumulation. Here, we summarize the mechanisms by which Ca2+ signaling influences or promotes PD progression and the main mechanisms involved in ferroptosis in Parkinson's disease. Understanding the mechanisms by which calcium and iron imbalances contribute to the progression of this disease is critical to developing effective treatments to combat this devastating neurological disorder.
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Affiliation(s)
- Ji Wang
- School of Chinese Materia Medica & Yunnan Key Laboratory of Southern Medicine Utilization, Yunnan University of Chinese Medicine, Kunming 650500, China;
- School of Pharmaceutical Science & Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming 650500, China; (J.Z.); (K.Z.); (S.W.)
| | - Jindong Zhao
- School of Pharmaceutical Science & Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming 650500, China; (J.Z.); (K.Z.); (S.W.)
| | - Kunying Zhao
- School of Pharmaceutical Science & Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming 650500, China; (J.Z.); (K.Z.); (S.W.)
| | - Shangpeng Wu
- School of Pharmaceutical Science & Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming 650500, China; (J.Z.); (K.Z.); (S.W.)
| | - Xinglong Chen
- School of Chinese Materia Medica & Yunnan Key Laboratory of Southern Medicine Utilization, Yunnan University of Chinese Medicine, Kunming 650500, China;
| | - Weiyan Hu
- School of Pharmaceutical Science & Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming 650500, China; (J.Z.); (K.Z.); (S.W.)
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Seddon AR, Das AB, Hampton MB, Stevens AJ. Site-specific decreases in DNA methylation in replicating cells following exposure to oxidative stress. Hum Mol Genet 2022; 32:632-648. [PMID: 36106794 PMCID: PMC9896486 DOI: 10.1093/hmg/ddac232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 09/01/2022] [Accepted: 09/03/2022] [Indexed: 02/07/2023] Open
Abstract
Oxidative stress is a common feature of inflammation-driven cancers, and it promotes genomic instability and aggressive tumour phenotypes. It is known that oxidative stress transiently modulates gene expression through the oxidation of transcription factors and associated regulatory proteins. Neutrophils are our most abundant white blood cells and accumulate at sites of infection and inflammation. Activated neutrophils produce hypochlorous acid and chloramines, which can disrupt DNA methylation by oxidizing methionine. The goal of the current study was to determine whether chloramine exposure results in sequence-specific modifications in DNA methylation that enable long-term alterations in transcriptional output. Proliferating Jurkat T-lymphoma cells were exposed to sublethal doses of glycine chloramine and differential methylation patterns were compared using Illumina EPIC 850 K bead chip arrays. There was a substantial genome-wide decrease in methylation 4 h after exposure that correlated with altered RNA expression for 24 and 48 h, indicating sustained impacts on exposed cells. A large proportion of the most significant differentially methylated CpG sites were situated towards chromosomal ends, suggesting that these regions are most susceptible to inhibition of maintenance DNA methylation. This may contribute to epigenetic instability of chromosomal ends in rapidly dividing cells, with potential implications for the regulation of telomere length and cellular longevity.
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Affiliation(s)
- Annika R Seddon
- University of Otago, Christchurch, Department of Pathology and Biomedical Science, Christchurch, 8011, New Zealand
| | - Andrew B Das
- University of Otago, Christchurch, Department of Pathology and Biomedical Science, Christchurch, 8011, New Zealand,Peter MacCallum Cancer Centre, Melbourne, Victoria 3000, Australia,Sir Peter MacCallum Department of Oncology, The University of Melbourne, Victoria 3010, Australia
| | - Mark B Hampton
- University of Otago, Christchurch, Department of Pathology and Biomedical Science, Christchurch, 8011, New Zealand
| | - Aaron J Stevens
- To whom correspondence should be addressed at: Department of Pathology, University of Otago, Wellington, 23 Mein St, Newtown, Wellington 6021, New Zealand. Tel: +64 43855541; Fax: +64 4 389 5725;
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Protein Quality Control in Glioblastoma: A Review of the Current Literature with New Perspectives on Therapeutic Targets. Int J Mol Sci 2022; 23:ijms23179734. [PMID: 36077131 PMCID: PMC9456419 DOI: 10.3390/ijms23179734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 08/12/2022] [Accepted: 08/24/2022] [Indexed: 11/17/2022] Open
Abstract
Protein quality control allows eukaryotes to maintain proteostasis under the stress of constantly changing conditions. In this review, we discuss the current literature on PQC, highlighting flaws that must exist for malignancy to occur. At the nidus of PQC, the expression of BAG1-6 reflects the cell environment; each isoform directs proteins toward different, parallel branches of the quality control cascade. The sum of these branches creates a net shift toward either homeostasis or apoptosis. With an established role in ALP, Bag3 is necessary for cell survival in stress conditions including those of the cancerous niche (i.e., hypoxia, hypermutation). Evidence suggests that excessive Bag3–HSP70 activity not only sustains, but also propagates cancers. Its role is anti-apoptotic—which allows malignant cells to persist—and intercellular—with the production of infectious ‘oncosomes’ enabling cancer expansion and recurrence. While Bag3 has been identified as a key prognostic indicator in several cancer types, its investigation is limited regarding glioblastoma. The cochaperone HSP70 has been strongly linked with GBM, while ALP inhibitors have been shown to improve GBM susceptibility to chemotherapeutics. Given the highly resilient, frequently recurrent nature of GBM, the targeting of Bag3 is a necessary consideration for the successful and definitive treatment of GBM.
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Suo H, Xiao N, Wang K. Potential roles of synaptotagmin family members in cancers: Recent advances and prospects. Front Med (Lausanne) 2022; 9:968081. [PMID: 36004367 PMCID: PMC9393329 DOI: 10.3389/fmed.2022.968081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 07/18/2022] [Indexed: 11/16/2022] Open
Abstract
With the continuous development of bioinformatics and public database, more and more genes that play a role in cancers have been discovered. Synaptotagmins (SYTs) are abundant, evolutionarily conserved integral membrane proteins composed of a short N-terminus, a variable linker domain, a single transmembrane domain, and two C2 domains, and they constitute a family of 17 isoforms. The synaptotagmin family members are known to regulate calcium-dependent membrane fusion events. Some SYTs play roles in hormone secretion or neurotransmitter release or both, and much evidence supports SYTs as Ca2+ sensors of exocytosis. Since 5 years ago, an increasing number of studies have found that SYTs also played important roles in the occurrence and development of lung cancer, gastric cancer, colon cancer, and other cancers. Down-regulation of SYTs inhibited cell proliferation, migration, and invasion of cancer cells, but promoted cell apoptosis. Growth of peritoneal nodules is inhibited and survival is prolonged in mice administrated with siSYTs intraperitoneally. Therefore, most studies have found SYTs serve as an oncogene after overexpression and may become potential prognostic biomarkers for multiple cancers. This article provides an overview of recent studies that focus on SYT family members’ roles in cancers and highlights the advances that have been achieved.
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Affiliation(s)
- Huandan Suo
- Department of Surgery, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - Nan Xiao
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - Kewei Wang
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of China Medical University, Shenyang, China
- *Correspondence: Kewei Wang,
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Xie Y, Zhi K, Meng X. Effects and Mechanisms of Synaptotagmin-7 in the Hippocampus on Cognitive Impairment in Aging Mice. Mol Neurobiol 2021; 58:5756-5771. [PMID: 34403042 DOI: 10.1007/s12035-021-02528-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 08/08/2021] [Indexed: 01/18/2023]
Abstract
Aging is an irreversible biological process that involves oxidative stress, neuroinflammation, and apoptosis, and eventually leads to cognitive dysfunction. However, the underlying mechanisms are not fully understood. In this study, we investigated the role and potential mechanisms of Synaptotagmin-7, a calcium membrane transporter in cognitive impairment in aging mice. Our results indicated that Synaptotagmin-7 expression significantly decreased in the hippocampus of D-galactose-induced or naturally aging mice when compared with healthy controls, as detected by western blot and quantitative reverse transcriptase-polymerase chain reaction analysis. Synaptotagmin-7 overexpression in the dorsal CA1 of the hippocampus reversed long-term potentiation and improved hippocampus-dependent spatial learning in D-galactose-induced aging mice. Synaptotagmin-7 overexpression also led to fully preserved learning and memory in 6-month-old mice. Mechanistically, we demonstrated that Synaptotagmin-7 improved learning and memory by elevating the level of fEPSP and downregulating the expression of aging-related genes such as p53 and p16. The results of our study provide new insights into the role of Synaptotagmin-7 in improving neuronal function and overcoming memory impairment caused by aging, suggesting that Synaptotagmin-7 overexpression may be an innovative therapeutic strategy for treating cognitive impairment.
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Affiliation(s)
- Yaru Xie
- Department of Neurobiology, Institute of Brain Research, School of Basic Medical Sciences, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Kaining Zhi
- Department of Neurobiology, Institute of Brain Research, School of Basic Medical Sciences, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Xianfang Meng
- Department of Neurobiology, Institute of Brain Research, School of Basic Medical Sciences, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
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Yang MF, Long XX, Hu HS, Bin YL, Chen XM, Wu BH, Peng QZ, Wang LS, Yao J, Li DF. Comprehensive analysis on the expression profile and prognostic values of Synaptotagmins (SYTs) family members and their methylation levels in gastric cancer. Bioengineered 2021; 12:3550-3565. [PMID: 34229539 PMCID: PMC8806422 DOI: 10.1080/21655979.2021.1951059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Synaptotagmins (SYTs), constitute a family of 17 membrane-trafficking protein, palying crucial roles in the development and progression of human cancers. However, only very few studies have investigated the expression profile and prognostic values of SYTs family members in gastric cancer (GC). Therefore, we comprehensively evaluated the expression, methylation, prognosis and immune significance of SYTs family members through bioinformatics analysis from the online databases in GC. The expressions of SYT4, SYT9, and SYT14 were up-regulated, and negatively associated with their methylation levels in GC. Both the over-expression of SYT4, SYT9 and SYT14 and their hypomethylation levels contributed to an unsatisfactory overall survival (OS) and progression-free survival (PFS) in GC. Moreover, the low expressions of several methylation cg sites (cg02795029, cg07581146, cg15149095, cg19922137, cg25371503, cg26158959, cg02269161, cg03226737, cg08185661, cg16437728, cg22723056 and cg24678137) were significantly correlated with an unfavorable OS and PFS in GC. Furthermore, the expression of SYT4, SYT9 and SYT14 played a pivotal role in immune cells infiltration in GC. Collectively, our current finding suggested that SYT4, SYT9 and SYT14 might be potent prognostic indictors and promising immunotherapeutic targets for GC patients.
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Affiliation(s)
- Mei-Feng Yang
- Department of Hematology, Yantian District People's Hospital, Shenzhen, Guangdong, China
| | - Xing-Xing Long
- Department of Hematology, The First Affiliated Hospital of South China of University, South China of University, Hengyang, Hunan, China
| | - Hong-Sai Hu
- Department of Gastroenterology, The Affiliated Zhuzhou Hospital of Xiangya Medical College, Zhuzhou, Hunan, China
| | - Yu-Ling Bin
- Department of Gastroenterology, The Affiliated Zhuzhou Hospital of Xiangya Medical College, Zhuzhou, Hunan, China
| | - Xuan-Ming Chen
- Department of Gastroenterology, The First Affiliated Hospital of South China of University, South China of University, Hengyang, Hunan, China
| | - Ben-Hua Wu
- Department of Gastroenterology, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, Guangdong, China
| | - Quan-Zhou Peng
- Department of Pathology, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, Guangdong, China
| | - Li-Sheng Wang
- Department of Gastroenterology, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, Guangdong, China
| | - Jun Yao
- Department of Gastroenterology, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, Guangdong, China
| | - De-Feng Li
- Department of Gastroenterology, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, Guangdong, China
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Song Y, Wang X, Hou A, Li H, Lou J, Liu Y, Cao J, Mi W. Integrative Analysis of lncRNA and mRNA and Profiles in Postoperative Delirium Patients. Front Aging Neurosci 2021; 13:665935. [PMID: 34093168 PMCID: PMC8171121 DOI: 10.3389/fnagi.2021.665935] [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: 02/09/2021] [Accepted: 04/21/2021] [Indexed: 12/23/2022] Open
Abstract
Delirium is a common serious complication that often occurs after major surgery. The goals of this study were to explore the expression profiles and functional networks of long non-coding RNAs (lncRNAs) and mRNAs in patients of postoperative delirium (POD). Microarray analysis was performed on the peripheral blood samples to identify differentially expressed (DE) lncRNAs and mRNAs in 4 POD patients and 4 non-POD volunteers. DE lncRNAs and mRNAs were validated by quantitative reverse transcription PCR (RT-qPCR). Bioinformatic analyses were performed to identify the critical biological functions and signaling pathways involved in POD. A total of 1195 DE lncRNAs and 735 DE mRNAs were identified between the POD and non-POD groups. Verified by the RT-qPCR, we identified 14 DE lncRNAs that may relate to the pathogenesis of POD. These 14 DE lncRNAs play important regulatory roles in “glutamate and 5-hydroxytryptamine,” “synaptotagmin 7,” “transient receptor potential channel,” “interleukin-2 production.” There was a regulatory relationship between lncRNA ENST00000530057 and synaptotagmin (Syt) 7 mRNA. The mRNA level of PCLO was up-regulated in POD group. This study showed abundant DE lncRNAs and mRNAs in POD that might help in deciphering the disease pathogenesis.
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Affiliation(s)
- Yuxiang Song
- Medical School of Chinese PLA, Beijing, China.,Department of Anesthesiology, The First Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Xiaoyan Wang
- Department of Anesthesiology, The Fourth Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Aisheng Hou
- Department of Anesthesiology, The First Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Hao Li
- Department of Anesthesiology, The First Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Jingsheng Lou
- Department of Anesthesiology, The First Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Yanhong Liu
- Department of Anesthesiology, The First Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Jiangbei Cao
- Department of Anesthesiology, The First Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Weidong Mi
- Department of Anesthesiology, The First Medical Center of Chinese PLA General Hospital, Beijing, China
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Chu M, Wan H, Zhang X. Requirement of splicing factor hnRNP A2B1 for tumorigenesis of melanoma stem cells. Stem Cell Res Ther 2021; 12:90. [PMID: 33509274 PMCID: PMC7842053 DOI: 10.1186/s13287-020-02124-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Accepted: 12/25/2020] [Indexed: 12/03/2022] Open
Abstract
Background Cancer stem cells play essential roles in tumorigenesis, thus forming an important target for tumor therapy. The hnRNP family proteins are important splicing factors that have been found to be associated with tumor progression. However, the influence of hnRNPs on cancer stem cells has not been extensively explored. Methods Quantitative real-time PCR and Western blot were used to examine gene expressions. RNA immunoprecipitation assays were conducted to identify the RNAs interacted with hnRNP A2B1. The in vivo assays were performed in nude mice. Results In this study, the results showed that out of 19 evaluated hnRNPs, hnRNP A2B1 was significantly upregulated in melanoma stem cells compared with non-stem cells, suggesting an important role of hnRNP A2B1 in cancer stem cells. Silencing of hnRNP A2B1 triggered cell cycle arrest in G2 phase, leading to apoptosis of melanoma stem cells. The results also revealed that hnRNP A2B1 could bind to the precursor mRNAs of pro-apoptosis genes (DAPK1, SYT7, and RNF128) and anti-apoptosis genes (EIF3H, TPPP3, and DOCK2) to regulate the splicing of these 6 genes, thus promoting the expressions of anti-apoptosis genes and suppressing the expressions of pro-apoptosis genes. The in vivo data indicated that hnRNP A2B1 was required for tumorigenesis by affecting the splicing of TPPP3, DOCK2, EIF3H, RNF128, DAPK1, and SYT7, thus suppressing apoptosis of melanoma stem cells. Conclusion Our findings showed the requirement of hnRNP A2B1 for tumorigenesis, thus presenting novel molecular insights into the role of hnRNPs in cancer stem cells.
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Affiliation(s)
- Mengqi Chu
- College of Life Sciences and Laboratory for Marine Biology and Biotechnology of Pilot National Laboratory for Marine Science and Technology (Qingdao), Zhejiang University, Hangzhou, 310058, People's Republic of China
| | - Haitao Wan
- College of Life Sciences and Laboratory for Marine Biology and Biotechnology of Pilot National Laboratory for Marine Science and Technology (Qingdao), Zhejiang University, Hangzhou, 310058, People's Republic of China
| | - Xiaobo Zhang
- College of Life Sciences and Laboratory for Marine Biology and Biotechnology of Pilot National Laboratory for Marine Science and Technology (Qingdao), Zhejiang University, Hangzhou, 310058, People's Republic of China.
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Jin H, Pang Q, Fang M, Wang Y, Man Z, Tan Y, Liu H. Syt-7 overexpression predicts poor prognosis and promotes cell proliferation in hepatocellular carcinoma. Future Oncol 2020; 16:2809-2819. [PMID: 33052751 DOI: 10.2217/fon-2020-0262] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Aim: To explore the prognostic significance of Syt-7 in hepatocellular carcinoma (HCC) and the potential mechanisms. Methods: Immunohistochemistry was used to examine the expression of Syt-7. Overall survival and disease-free survival were compared between Syt-7 positive and negative groups. The effects of Syt-7 knockdown on BEL-7404 cells were further evaluated. Results: Syt-7 expression was significantly higher in HCC tumorous tissues compared with paracancerous tissues. Syt-7 was closely associated with α-fetoprotein tumor size, vascular invasion, tumor node metastasis stage and tumor differentiation. Syt-7 was an independent risk factor for overall survival and disease-free survival. Additionally, Syt-7 knockdown inhibited proliferation and colony formation and induced cell cycle arrest in HCC cells. Conclusion: Syt-7 overexpression forecasts unfavorable prognosis and promotes cell proliferation in HCC.
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Affiliation(s)
- Hao Jin
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, PR China
| | - Qing Pang
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, PR China
| | - Meifang Fang
- Department of Radiotherapy, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, PR China
| | - Yong Wang
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, PR China
| | - Zhongran Man
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, PR China
| | - Yi Tan
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, PR China
| | - Huichun Liu
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, PR China
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Deng Y, Wan H, Tian J, Cheng X, Rao M, Li J, Zhang H, Zhang M, Cai Y, Lu Z, Li Y, Niu S, Shen N, Chang J, Fang Z, Zhong R. CpG-methylation-based risk score predicts progression in colorectal cancer. Epigenomics 2020; 12:605-615. [DOI: 10.2217/epi-2019-0300] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Aim: To identify patients with colorectal cancer (CRC) who are at a truly higher risk of progression, which is key for individualized approaches to precision therapy. Materials & methods: We developed a predictor associated with progression-free interval (PFI) using The Cancer Genome Atlas CRC methylation data. Results: The risk score was associated with PFI in the whole cohort (p < 0.001). A nomogram consisting of the risk score and other significant clinical features was generated to predict the 3- and 5-year PFI in the whole set (area under the curve: 0.79 and 0.71, respectively). Conclusion: The risk score based on 23 DNA-methylation sites may serve as the basis for improved prediction of progression in patients with CRC in future clinical practice.
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Affiliation(s)
- Yao Deng
- Department of Epidemiology & Biostatistics & Ministry of Education Key Lab of Environment & Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, Hubei 430030, PR China
| | - Hao Wan
- Department of Epidemiology & Biostatistics & Ministry of Education Key Lab of Environment & Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, Hubei 430030, PR China
| | - Jianbo Tian
- Department of Epidemiology & Biostatistics & Ministry of Education Key Lab of Environment & Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, Hubei 430030, PR China
| | - Xiang Cheng
- Department of Hepatobiliary Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430022, PR China
| | - Meilin Rao
- Department of Epidemiology & Biostatistics & Ministry of Education Key Lab of Environment & Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, Hubei 430030, PR China
| | - Jiaoyuan Li
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, PR China
| | - Hongli Zhang
- Department of Epidemiology & Biostatistics & Ministry of Education Key Lab of Environment & Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, Hubei 430030, PR China
| | - Ming Zhang
- Department of Epidemiology & Biostatistics & Ministry of Education Key Lab of Environment & Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, Hubei 430030, PR China
| | - Yimin Cai
- Department of Epidemiology & Biostatistics & Ministry of Education Key Lab of Environment & Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, Hubei 430030, PR China
| | - Zequn Lu
- Department of Epidemiology & Biostatistics & Ministry of Education Key Lab of Environment & Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, Hubei 430030, PR China
| | - Yue Li
- Department of Epidemiology & Biostatistics & Ministry of Education Key Lab of Environment & Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, Hubei 430030, PR China
| | - Siyuan Niu
- Department of Epidemiology & Biostatistics & Ministry of Education Key Lab of Environment & Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, Hubei 430030, PR China
| | - Na Shen
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, PR China
| | - Jiang Chang
- Department of Epidemiology & Biostatistics & Ministry of Education Key Lab of Environment & Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, Hubei 430030, PR China
| | - Zemin Fang
- Division of Cardiothoracic & Vascular Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430030, PR China
| | - Rong Zhong
- Department of Epidemiology & Biostatistics & Ministry of Education Key Lab of Environment & Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, Hubei 430030, PR China
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13
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Wu Z, Sun Z, Huang R, Zang D, Wang C, Yan X, Yan W. Silencing of synaptotagmin 7 regulates osteosarcoma cell proliferation, apoptosis, and migration. Histol Histopathol 2019; 35:303-312. [PMID: 31631310 DOI: 10.14670/hh-18-174] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Synaptotagmin 7 (SYT7) is a component of the synaptotagmin family, which is essential in many physiological and pathological processes. In this study, we aimed to investigate the role of SYT7 in osteosarcoma. METHODS We defined the expression levels of SYT7 in osteosarcoma tissues and para-sarcoma tissues by immunohistochemistry and analyzed the possible correlation between SYT7 expression and pathological characteristics via Mann-Whitney U analysis and Spearman correlation analysis. The effects of SYT7 silencing in vitro cell growth were assessed by MTT assay. Cell cycle and cell apoptosis were assessed by flow cytometry analysis. Wound healing assay and transwell assay were applied to assess the migration and invasion capacity. RESULTS The results showed that the expression levels of SYT7 were upregulated in osteosarcoma tissues compared with para-sarcoma tissues and positively correlated with the pathological characteristics of osteosarcoma. Functional experiments demonstrated that SYT7 silencing significantly inhibited cell proliferation and colony formation capacity (P<0.001), induced cell cycle arrest which increased the proportion of G2 phase and decreased the proportion of S phase, enhanced cell apoptosis (P<0.01), and limited the capacity of migration and invasion (P<0.01), compared with shCtrl group. CONCLUSION The results indicated that SYT7 plays a crucial role in the development of osteosarcoma. SYT7 can be applied as a new diagnostic and therapeutic target in osteosarcoma.
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Affiliation(s)
- Zhiqiang Wu
- Department of Oncology, Shanghai Medical College, Fudan University, Xuhui District, Shanghai, China.,Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Xuhui District, Shanghai, China
| | - Zhengwang Sun
- Department of Oncology, Shanghai Medical College, Fudan University, Xuhui District, Shanghai, China.,Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Xuhui District, Shanghai, China
| | - Rui Huang
- Department of General Surgery, PLA 455 hospital, Changning District, Shanghai, China
| | - Ding Zang
- Department of Clinical Laboratory, PLA 455 hospital, Changning District, Shanghai, China
| | - Chunmeng Wang
- Department of Oncology, Shanghai Medical College, Fudan University, Xuhui District, Shanghai, China.,Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Xuhui District, Shanghai, China
| | - Xu Yan
- Department of Orthopedics, PLA 455 hospital, Changning District, Shanghai, China.
| | - Wangjun Yan
- Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Xuhui District, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Xuhui District, Shanghai, China.
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Synaptotagmin-7, a binding protein of P53, inhibits the senescence and promotes the tumorigenicity of lung cancer cells. Biosci Rep 2019; 39:BSR20181298. [PMID: 30647108 PMCID: PMC6367206 DOI: 10.1042/bsr20181298] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 12/28/2018] [Accepted: 01/13/2019] [Indexed: 01/10/2023] Open
Abstract
Lung cancer has been one of the most common malignancies in the world. Cell senescence has been recognized as the avenue to inhibit tumor progression. However, the mechanisms remain poorly understood. In the present study, we have shown that synaptotagmin-7 (SYT7) expression was up-regulated in lung cancer. SYT7 also promoted the growth and colony formation of lung cancer cells and inhibited their senescence. In a molecular mechanism study, SYT7 was shown to interact with P53 and to potentiate the interaction between P53 and MDM2. Taken together, the present study demonstrates the oncogenic roles of SYT7 in lung cancer, and suggests that SYT7 may be a good therapeutic target for lung cancer treatment.
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