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Yang GE, Kim MH, Jeong MS, Lee SY, Choi YH, Nam JK, Kim TN, Leem SH. Association between PDCD6-VNTR polymorphism and urinary cancer susceptibility. Genes Genomics 2024:10.1007/s13258-024-01523-9. [PMID: 38850471 DOI: 10.1007/s13258-024-01523-9] [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: 04/04/2024] [Accepted: 05/08/2024] [Indexed: 06/10/2024]
Abstract
BACKGROUND Programmed cell death 6 (PDCD6) is known to be involved in apoptosis and tumorigenesis. Given the reported association with urinary cancer susceptibility through SNP analysis, we further analyzed the entire genomic structure of PDCD6. METHODS Three VNTR regions (MS1-MS3) were identified through the analysis of the genomic structure of PDCD6. To investigate the association between these VNTR regions and urinary cancer susceptibility, genomic DNA was extracted from 413 cancer-free male controls, 267 bladder cancer patients, and 331 prostate cancer patients. Polymerase chain reaction (PCR) was performed to analyze the PDCD6-MS regions. Statistical analysis was performed to determine the association between specific genotypes and cancer risk. In addition, the effect of specific VNTRs on PDCD6 expression was also confirmed using a reporter vector. RESULTS Among the three VNTR regions, MS1 and MS2 exhibited monomorphism, while the MS3 region represented polymorphism, with its transmission to subsequent generations through meiosis substantiating its utility as a DNA typing marker. In a case-control study, the presence of rare alleles within PDCD6-MS3 exhibited significant associations with both bladder cancer (OR = 2.37, 95% CI: 1.33-4.95, P = 0.019) and prostate cancer (OR = 2.11, 95% CI: 1.03-4.36, P = 0.038). Furthermore, through luciferase assays, we validated the impact of the MS3 region on modulating PDCD6 expression. CONCLUSIONS This study suggests that the PDCD6-MS3 region could serve as a prognostic marker for urinary cancers, specifically bladder cancer and prostate cancer. Moreover, the subdued influence exerted by PDCD6-MS3 on the expression of PDCD6 offers another insight concerning the progression of urinary cancer.
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Affiliation(s)
- Gi-Eun Yang
- Department of Biomedical Sciences, Dong-A University, Busan, 49315, Korea
- Department of Health Sciences, The Graduate School of Dong-A University, Busan, 49315, Korea
| | - Min-Hye Kim
- Department of Biomedical Sciences, Dong-A University, Busan, 49315, Korea
| | - Mi-So Jeong
- Department of Biomedical Sciences, Dong-A University, Busan, 49315, Korea
- Research Center, Dongnam Institute of Radiological & Medical Sciences (DIRAMS), Busan, 46033, Korea
| | - Sang-Yeop Lee
- Research Center for Bioconvergence Analysis, Korea Basic Science Institute, Ochang, 28119, Korea
| | - Yung Hyun Choi
- Department of Biochemistry, College of Oriental Medicine, Anti-Aging Research Center, Dong-Eui University, Busan, 47227, Korea
| | - Jong-Kil Nam
- Department of Urology, Pusan National University Yangsan Hospital, Pusan National University School of Medicine, Research Institute for Convergence of Biomedical Science and Technology, Yangsan, 50612, Korea
| | - Tae Nam Kim
- Department of Urology, Pusan National University Hospital, Pusan National University School of Medicine, Biomedical Research Institute and Pusan National University Hospital, Busan, 49241, Korea.
| | - Sun-Hee Leem
- Department of Biomedical Sciences, Dong-A University, Busan, 49315, Korea.
- Department of Health Sciences, The Graduate School of Dong-A University, Busan, 49315, Korea.
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2
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Zhu Y, Li Q. Multifaceted roles of PDCD6 both within and outside the cell. J Cell Physiol 2024; 239:e31235. [PMID: 38436472 DOI: 10.1002/jcp.31235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 02/15/2024] [Accepted: 02/20/2024] [Indexed: 03/05/2024]
Abstract
Programmed cell death protein 6 (PDCD6) is an evolutionarily conserved Ca2+-binding protein. PDCD6 is involved in regulating multifaceted and pleiotropic cellular processes in different cellular compartments. For instance, nuclear PDCD6 regulates apoptosis and alternative splicing. PDCD6 is required for coat protein complex II-dependent endoplasmic reticulum-to-Golgi apparatus vesicular transport in the cytoplasm. Recent advances suggest that cytoplasmic PDCD6 is involved in the regulation of cytoskeletal dynamics and innate immune responses. Additionally, membranous PDCD6 participates in membrane repair through endosomal sorting complex required for transport complex-dependent membrane budding. Interestingly, extracellular vesicles are rich in PDCD6. Moreover, abnormal expression of PDCD6 is closely associated with many diseases, especially cancer. PDCD6 is therefore a multifaceted but pivotal protein in vivo. To gain a more comprehensive understanding of PDCD6 functions and to focus and stimulate PDCD6 research, this review summarizes key developments in its role in different subcellular compartments, processes, and pathologies.
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Affiliation(s)
- Yigao Zhu
- Center for Cell Structure and Function, Shandong Provincial Key Laboratory of Animal Resistance Biology, Collaborative Innovation Center of Cell Biology in Universities of Shandong, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Qingchao Li
- Center for Cell Structure and Function, Shandong Provincial Key Laboratory of Animal Resistance Biology, Collaborative Innovation Center of Cell Biology in Universities of Shandong, College of Life Sciences, Shandong Normal University, Jinan, China
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3
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Chen ZJ, Xiao J, Chen HH. Identification of Key Genes Related to Immune Cells in Patients with COVID-19 Via Integrated Bioinformatics-Based Analysis. Biochem Genet 2023; 61:2650-2671. [PMID: 37222960 PMCID: PMC10206360 DOI: 10.1007/s10528-023-10400-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Accepted: 05/08/2023] [Indexed: 05/25/2023]
Abstract
COVID-19 has spread all over the world which poses a serious threat to social economic development and public health. Despite enormous progress has been made in the prevention and treatment of COVID-19, the specific mechanism and biomarker related to disease severity or prognosis have not been clarified yet. Our study intended to further explore the diagnostic markers of COVID-19 and their relationship with serum immunology by bioinformatics analysis. The datasets about COVID-19 were downloaded from the Gene Expression Omnibus (GEO) dataset. The differentially expressed genes (DEGs) were selected via the limma package. Then, weighted gene co-expression network analysis (WGCNA) was conducted to identify the critical module associated with the clinic status. The intersection DEGs were processed for further enrichment analysis. The final diagnostic genes for COVID-19 were selected and verified through special bioinformatics algorithms. There were significant DEGs between the normal and COVID-19 patients. These genes were mainly enriched in cell cycle, complement and coagulation cascade, extracellular matrix (ECM) receptor interaction, and the P53 signaling pathway. As much as 357 common intersected DEGs were selected in the end. These DEGs were enriched in organelle fission, mitotic cell cycle phase transition, DNA helicase activity, cell cycle, cellular senescence, and P53 signaling pathway. Our study also identified CDC25A, PDCD6, and YWAHE were potential diagnostic markers of COVID-19 with the AUC (area under curve), 0.958 (95% CI 0.920-0.988), 0.941(95% CI 0.892-0.980), and 0.929 (95% CI 0.880-0.971). Moreover, CDC25A, PDCD6, and YWAHE were correlated with plasma cells, macrophages M0, T cells CD4 memory resting, T cells CD8, dendritic cells, and NK cells. Our study discovered that CDC25A, PDCD6, and YWAHE can be used as diagnostic markers for COVID-19. Moreover, these biomarkers were also closely associated with immune cell infiltration, which plays a pivotal role in the diagnosis and progression of COVID-19.
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Affiliation(s)
- Zhao-Jun Chen
- Department of Infectious Disease, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Jie Xiao
- Department of Cardiology, Wuhan Asia Heart General Hospital, Wuhan, China
| | - Hai-Hua Chen
- Emergency Center, Zhongnan Hospital of Wuhan University, Wuhan, China.
- Hubei Clinical Research Center for Emergency and Resuscitation, Zhongnan Hospital of Wuhan University, Wuhan, China.
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4
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Zhang Y, Yang L, Zhang Y, Liang Y, Zhao H, Li Y, Cai G, Wu Z, Li Z. Identification of Important Factors Causing Developmental Arrest in Cloned Pig Embryos by Embryo Biopsy Combined with Microproteomics. Int J Mol Sci 2022; 23:ijms232415975. [PMID: 36555617 PMCID: PMC9783476 DOI: 10.3390/ijms232415975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 12/07/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022] Open
Abstract
The technique of pig cloning holds great promise for the livestock industry, life science, and biomedicine. However, the prenatal death rate of cloned pig embryos is extremely high, resulting in a very low cloning efficiency. This limits the development and application of pig cloning. In this study, we utilized embryo biopsy combined with microproteomics to identify potential factors causing the developmental arrest in cloned pig embryos. We verified the roles of two potential regulators, PDCD6 and PLK1, in cloned pig embryo development. We found that siRNA-mediated knockdown of PDCD6 reduced mRNA and protein expression levels of the pro-apoptotic gene, CASP3, in cloned pig embryos. PDCD6 knockdown also increased the cleavage rate and blastocyst rate of cloned porcine embryos. Overexpression of PLK1 via mRNA microinjection also improved the cleavage rate of cloned pig embryos. This study provided a new strategy to identify key factors responsible for the developmental defects in cloned pig embryos. It also helped establish new methods to improve pig cloning efficiency, specifically by correcting the expression pattern of PDCD6 and PLK1 in cloned pig embryos.
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Affiliation(s)
- Yuxing Zhang
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510030, China
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, Guangzhou 510030, China
- Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510030, China
| | - Liusong Yang
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510030, China
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, Guangzhou 510030, China
- Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510030, China
| | - Yiqian Zhang
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510030, China
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, Guangzhou 510030, China
- Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510030, China
| | - Yalin Liang
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510030, China
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, Guangzhou 510030, China
- Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510030, China
| | - Huaxing Zhao
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510030, China
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, Guangzhou 510030, China
- Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510030, China
| | - Yanan Li
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510030, China
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, Guangzhou 510030, China
- Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510030, China
| | - Gengyuan Cai
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510030, China
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, Guangzhou 510030, China
- Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510030, China
| | - Zhenfang Wu
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510030, China
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, Guangzhou 510030, China
- Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510030, China
- Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, Guangzhou 510642, China
- Correspondence: (Z.W.); (Z.L.)
| | - Zicong Li
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou 510030, China
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, Guangzhou 510030, China
- Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510030, China
- Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, Guangzhou 510642, China
- Correspondence: (Z.W.); (Z.L.)
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Loers G, Theis T, Baixia Hao H, Kleene R, Arsha S, Samuel N, Arsha N, Young W, Schachner M. Interplay in neural functions of cell adhesion molecule close homolog of L1 (CHL1) and Programmed Cell Death 6 (PDCD6). FASEB Bioadv 2022; 4:43-59. [PMID: 35024572 PMCID: PMC8728108 DOI: 10.1096/fba.2021-00027] [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: 02/23/2021] [Revised: 07/16/2021] [Accepted: 07/27/2021] [Indexed: 11/11/2022] Open
Abstract
Close homolog of L1 (CHL1) is a cell adhesion molecule of the immunoglobulin superfamily. It promotes neuritogenesis and survival of neurons in vitro. In vivo, CHL1 promotes nervous system development, regeneration after trauma, and synaptic function and plasticity. We identified programmed cell death 6 (PDCD6) as a novel binding partner of the CHL1 intracellular domain (CHL1-ICD). Co-immunoprecipitation, pull-down assay with CHL1-ICD, and proximity ligation in cerebellum and pons of 3-day-old and 6-month-old mice, as well as in cultured cerebellar granule neurons and cortical astrocytes indicate an association between PDCD6 and CHL1. The Ca2+-chelator BAPTA-AM inhibited the association between CHL1 and PDCD6. The treatment of cerebellar granule neurons with a cell-penetrating peptide comprising the cell surface proximal 30 N-terminal amino acids of CHL1-ICD inhibited the association between CHL1 and PDCD6 and PDCD6- and CHL1-triggered neuronal survival. These results suggest that PDCD6 contributes to CHL1 functions in the nervous system.
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Affiliation(s)
- Gabriele Loers
- Zentrum für Molekulare NeurobiologieUniversitätsklinikum Hamburg‐EppendorfHamburgGermany
| | - Thomas Theis
- Keck Center for Collaborative Neuroscience and Department of Cell Biology and NeuroscienceRutgers UniversityPiscatawayNJUSA
| | - Helen Baixia Hao
- Keck Center for Collaborative Neuroscience and Department of Cell Biology and NeuroscienceRutgers UniversityPiscatawayNJUSA
| | - Ralf Kleene
- Zentrum für Molekulare NeurobiologieUniversitätsklinikum Hamburg‐EppendorfHamburgGermany
| | - Sanjana Arsha
- Keck Center for Collaborative Neuroscience and Department of Cell Biology and NeuroscienceRutgers UniversityPiscatawayNJUSA
| | - Nina Samuel
- Keck Center for Collaborative Neuroscience and Department of Cell Biology and NeuroscienceRutgers UniversityPiscatawayNJUSA
| | - Neha Arsha
- Keck Center for Collaborative Neuroscience and Department of Cell Biology and NeuroscienceRutgers UniversityPiscatawayNJUSA
| | - Wise Young
- Keck Center for Collaborative Neuroscience and Department of Cell Biology and NeuroscienceRutgers UniversityPiscatawayNJUSA
| | - Melitta Schachner
- Keck Center for Collaborative Neuroscience and Department of Cell Biology and NeuroscienceRutgers UniversityPiscatawayNJUSA
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6
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Gong Y, Kong T, Ren X, Lin S, Li S. miR-9875 functions in antiviral immunity by targeting PDCD6 in mud crab ( Scylla paramamosain). Virulence 2020; 11:849-862. [PMID: 32597292 PMCID: PMC7549984 DOI: 10.1080/21505594.2020.1787078] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Revised: 05/23/2020] [Accepted: 06/17/2020] [Indexed: 12/23/2022] Open
Abstract
Programmed cell death 6 (PDCD6) is a well-known apoptosis regulator that is involved in the immunity of mammals. However, the effects of miRNA-mediated regulation of PDCD6 expression on apoptosis and virus infection in organisms, especially in marine invertebrates, have not been extensively explored. In this study, PDCD6 of mud crab (Scylla paramamosain) (Sp-PDCD6) was characterized. The results showed that Sp-PDCD6 contains five EF-hands domains and could suppress virus infection via apoptosis promotion. It also presented that Sp-PDCD6 was directly targeted by miR-9875 in vitro and in vivo, miR-9875 served as a positive regulator during the virus invasion. The findings indicated that the miR-9875-PDCD6 pathway possessed fundamental effects on the immune response to virus infection in mud crab. Therefore, our research provided a novel insight into the roles of both miR-9875 and PDCD6 in the regulation of apoptosis and virus defense in mud crab.
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Affiliation(s)
- Yi Gong
- Guangdong Provincial Key Laboratory of Marine Biology, Shantou University, Shantou, China
- Institute of Marine Sciences, Shantou University, Shantou, China
- Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China
- STU-UMT Joint Shellfish Research Laboratory, Shantou University, Shantou, China
| | - Tongtong Kong
- Guangdong Provincial Key Laboratory of Marine Biology, Shantou University, Shantou, China
- Institute of Marine Sciences, Shantou University, Shantou, China
- STU-UMT Joint Shellfish Research Laboratory, Shantou University, Shantou, China
| | - Xin Ren
- Guangdong Provincial Key Laboratory of Marine Biology, Shantou University, Shantou, China
- Institute of Marine Sciences, Shantou University, Shantou, China
- STU-UMT Joint Shellfish Research Laboratory, Shantou University, Shantou, China
| | - Shanmeng Lin
- Guangdong Provincial Key Laboratory of Marine Biology, Shantou University, Shantou, China
- Institute of Marine Sciences, Shantou University, Shantou, China
- STU-UMT Joint Shellfish Research Laboratory, Shantou University, Shantou, China
| | - Shengkang Li
- Guangdong Provincial Key Laboratory of Marine Biology, Shantou University, Shantou, China
- Institute of Marine Sciences, Shantou University, Shantou, China
- Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China
- STU-UMT Joint Shellfish Research Laboratory, Shantou University, Shantou, China
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7
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The Influence of Quadruplex Structure in Proximity to P53 Target Sequences on the Transactivation Potential of P53 Alpha Isoforms. Int J Mol Sci 2019; 21:ijms21010127. [PMID: 31878115 PMCID: PMC6982142 DOI: 10.3390/ijms21010127] [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: 10/30/2019] [Revised: 12/22/2019] [Accepted: 12/23/2019] [Indexed: 12/24/2022] Open
Abstract
p53 is one of the most studied tumor suppressor proteins that plays an important role in basic biological processes including cell cycle, DNA damage response, apoptosis, and senescence. The human TP53 gene contains alternative promoters that produce N-terminally truncated proteins and can produce several isoforms due to alternative splicing. p53 function is realized by binding to a specific DNA response element (RE), resulting in the transactivation of target genes. Here, we evaluated the influence of quadruplex DNA structure on the transactivation potential of full-length and N-terminal truncated p53α isoforms in a panel of S. cerevisiae luciferase reporter strains. Our results show that a G-quadruplex prone sequence is not sufficient for transcription activation by p53α isoforms, but the presence of this feature in proximity to a p53 RE leads to a significant reduction of transcriptional activity and changes the dynamics between co-expressed p53α isoforms.
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8
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Li SS, Jiang WL, Xiao WQ, Li K, Zhang YF, Guo XY, Dai YQ, Zhao QY, Jiang MJ, Lu ZJ, Wan R. KMT2D deficiency enhances the anti-cancer activity of L48H37 in pancreatic ductal adenocarcinoma. World J Gastrointest Oncol 2019; 11:599-621. [PMID: 31435462 PMCID: PMC6700028 DOI: 10.4251/wjgo.v11.i8.599] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 01/23/2019] [Accepted: 02/27/2019] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Novel therapeutic strategies are urgently needed for patients with a delayed diagnosis of pancreatic ductal adenocarcinoma (PDAC) in order to improve their chances of survival. Recent studies have shown potent anti-neoplastic effects of curcumin and its analogues. In addition, the role of histone methyltransferases on cancer therapeutics has also been elucidated. However, the relationship between these two factors in the treatment of pancreatic cancer remains unknown. Our working hypothesis was that L48H37, a novel curcumin analog, has better efficacy in pancreatic cancer cell growth inhibition in the absence of histone-lysine N-methyltransferase 2D (KMT2D).
AIM To determine the anti-cancer effects of L48H37 in PDAC, and the role of KMT2D on its therapeutic efficacy.
METHODS The viability and proliferation of primary (PANC-1 and MIA PaCa-2) and metastatic (SW1990 and ASPC-1) PDAC cell lines treated with L48H37 was determined by CCK8 and colony formation assay. Apoptosis, mitochondrial membrane potential (MMP), reactive oxygen species (ROS) levels, and cell cycle profile were determined by staining the cells with Annexin-V/7-AAD, JC-1, DCFH-DA, and PI respectively, as well as flow cytometric acquisition. In vitro migration was assessed by the wound healing assay. The protein and mRNA levels of relevant factors were analyzed using Western blotting, immunofluorescence and real time-quantitative PCR. The in situ expression of KMT2D in both human PDAC and paired adjacent normal tissues was determined by immunohistochemistry. In vivo tumor xenografts were established by injecting nude mice with PDAC cells. Bioinformatics analyses were also conducted using gene expression databases and TCGA.
RESULTS L48H37 inhibited the proliferation and induced apoptosis in SW1990 and ASPC-1 cells in a dose- and time-dependent manner, while also reducing MMP, increasing ROS levels, arresting cell cycle at the G2/M stages and activating the endoplasmic reticulum (ER) stress-associated protein kinase RNA-like endoplasmic reticulum kinase/eukaryotic initiation factor 2α/activating transcription factor 4 (ATF4)/CHOP signaling pathway. Knocking down ATF4 significantly upregulated KMT2D in PDAC cells, and also decreased L48H37-induced apoptosis. Furthermore, silencing KMT2D in L48H37-treated cells significantly augmented apoptosis and the ER stress pathway, indicating that KMT2D depletion is essential for the anti-neoplastic effects of L48H37. Administering L48H37 to mice bearing tumors derived from control or KMT2D-knockdown PDAC cells significantly decreased the tumor burden. We also identified several differentially expressed genes in PDAC cell lines expressing very low levels of KMT2D that were functionally categorized into the extrinsic apoptotic signaling pathway. The KMT2D high- and low-expressing PDAC patients from the TCGA database showed similar survival rates,but higher KMT2D expression was associated with poor tumor grade in clinical and pathological analyses.
CONCLUSION L48H37 exerts a potent anti-cancer effect in PDAC, which is augmented by KMT2D deficiency.
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Affiliation(s)
- Si-Si Li
- Department of Gastroenterology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201620, China
- Shanghai Key Laboratory of Pancreatic Diseases, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201620, China
| | - Wei-Liang Jiang
- Department of Gastroenterology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201620, China
| | - Wen-Qin Xiao
- Department of Gastroenterology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201620, China
| | - Kai Li
- Department of Gastroenterology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201620, China
| | - Ye-Fei Zhang
- Department of Gastroenterology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201620, China
| | - Xing-Ya Guo
- Department of Gastroenterology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201620, China
| | - Yi-Qi Dai
- Department of Gastroenterology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201620, China
| | - Qiu-Yan Zhao
- Department of Gastroenterology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201620, China
- Shanghai Key Laboratory of Pancreatic Diseases, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201620, China
| | - Ming-Jie Jiang
- Shanghai Key Laboratory of Pancreatic Diseases, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201620, China
| | - Zhan-Jun Lu
- Department of Gastroenterology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201620, China
| | - Rong Wan
- Department of Gastroenterology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201620, China
- Shanghai Key Laboratory of Pancreatic Diseases, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201620, China
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9
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Shibata H. Adaptor functions of the Ca 2+-binding protein ALG-2 in protein transport from the endoplasmic reticulum. Biosci Biotechnol Biochem 2018; 83:20-32. [PMID: 30259798 DOI: 10.1080/09168451.2018.1525274] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Apoptosis-linked gene 2 (ALG-2) is a Ca2+-binding protein with five repetitive EF-hand motifs, named penta-EF-hand (PEF) domain. It interacts with various target proteins and functions as a Ca2+-dependent adaptor in diverse cellular activities. In the cytoplasm, ALG-2 is predominantly localized to a specialized region of the endoplasmic reticulum (ER), called the ER exit site (ERES), through its interaction with Sec31A. Sec31A is an outer coat protein of coat protein complex II (COPII) and is recruited from the cytosol to the ERES to form COPII-coated transport vesicles. I will overview current knowledge of the physiological significance of ALG-2 in regulating ERES localization of Sec31A and the following adaptor functions of ALG-2, including bridging Sec31A and annexin A11 to stabilize Sec31A at the ERES, polymerizing the Trk-fused gene (TFG) product, and linking MAPK1-interacting and spindle stabilizing (MISS)-like (MISSL) and microtubule-associated protein 1B (MAP1B) to promote anterograde transport from the ER.
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Affiliation(s)
- Hideki Shibata
- a Department of Applied Biosciences, Graduate School of Bioagricultural Sciences , Nagoya University , Chikusa-ku , Nagoya , Japan
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10
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Wang N, Zhan J, Guo C, Li C, Shen N, Gu X, Xie Y, Peng X, Yang G. Molecular Characterisation and Functions of Fis1 and PDCD6 Genes from Echinococcus granulosus. Int J Mol Sci 2018; 19:ijms19092669. [PMID: 30205566 PMCID: PMC6165261 DOI: 10.3390/ijms19092669] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Revised: 08/22/2018] [Accepted: 09/05/2018] [Indexed: 11/16/2022] Open
Abstract
Cystic echinococcosis, a parasitic zoonosis that causes significant economic losses and poses a threat to public health, is caused by larvae of the tapeworm Echinococcus granulosus. Infection causes infertile cysts in intermediate hosts that cannot produce protoscoleces (PSCs) or complete the life cycle. Herein, we cloned, expressed, and characterised mitochondrial fission protein 1 (Eg-Fis1) and programmed cell death protein 6 (Eg-PDCD6) from E. granulosus, and explored their functions related to infertile cysts. Eg-Fis1 and Eg-PDCD6 encode putative 157 and 174 residue proteins, respectively, and Western blotting indicated good reactogenicity for both. Eg-Fis1 and Eg-PDCD6 were ubiquitously distributed in all stages of E. granulosus. Furthermore, mRNAs of Eg-Fis1 and Eg-PDCD6 were upregulated following H2O2 treatment which induced apoptosis in PSCs. To investigate the regulation of apoptosis in response to oxidative stress, RNA interference (RNAi) and terminal deoxynucleotidyl transferase dUTP nick-end labelling (TUNEL) assays were performed. The apoptotic rate of the Eg-Fis1 RNAi group was significantly lower than non-interference group, but there was no such difference for Eg-PDCD6. In conclusion, Eg-Fis1 promotes apoptosis induced by oxidative stress, whereas Eg-PDCD6 does not appear to be a key regulator of apoptosis.
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Affiliation(s)
- Ning Wang
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China.
- College of Bioengineering, Sichuan University of Science and Engineering, Yibin 644000, China.
| | - Jiafei Zhan
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China.
| | - Cheng Guo
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China.
| | - Chunyan Li
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China.
| | - Nengxing Shen
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China.
| | - Xiaobin Gu
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China.
| | - Yue Xie
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China.
| | - Xuerong Peng
- Department of Chemistry, College of Life and Basic Science, Sichuan Agricultural University, Chengdu 611130, China.
| | - Guangyou Yang
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China.
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11
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Panagopoulos I, Gorunova L, Jacobsen EM, Andersen K, Micci F, Heim S. RUNX1-PDCD6 fusion resulting from a novel t(5;21)(p15;q22) chromosome translocation in myelodysplastic syndrome secondary to chronic lymphocytic leukemia. PLoS One 2018; 13:e0196181. [PMID: 29672642 PMCID: PMC5908135 DOI: 10.1371/journal.pone.0196181] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 04/06/2018] [Indexed: 01/03/2023] Open
Abstract
Leukemic cells often carry chromosome aberrations which generate chimeric genes of pathogenetic, diagnostic, and prognostic importance. New rearrangements giving rise to novel fusion genes define hitherto unrecognized genetic leukemia subgroups. G-banding, fluorescence in situ hybridization (FISH), and molecular genetic analyses were done on bone marrow cells from a patient with chronic lymphocytic leukemia (CLL) and secondary myelodysplasia. The G-banding analysis revealed the karyotype 46,XX,del(21)(q22)[9]/46,XX[2]. FISH on metaphase spreads with a RUNX1 break apart probe demonstrated that part of RUNX1 (from 21q22) had moved to chromosome band 5p15. RNA sequencing showed in-frame fusion of RUNX1 with PDCD6 (from 5p15), something that was verified by RT-PCR together with Sanger sequencing. Further FISH analyses with PDCD6 and RUNX1 home-made break apart/double fusion probes showed a red signal (PDCD6) on chromosome 5, a green signal on chromosome 21 (RUNX1), and two yellow fusion signals, one on der(5) and the other on der(21). Reassessment of the G-banding preparations in light of the FISH and RNA-sequencing data thus yielded the karyotype 46,XX,t(5;21)(p15;q22)[9]/46,XX[2]. The t(5;21)(p15;q22)/RUNX1-PDCD6 was detected only by performing molecular studies of the leukemic cells, but should be sought after also in other leukemic/myelodysplastic cases with del(21q).
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MESH Headings
- Amino Acid Sequence
- Apoptosis Regulatory Proteins/genetics
- Calcium-Binding Proteins/genetics
- Chromosome Banding
- Chromosomes, Human, Pair 21
- Chromosomes, Human, Pair 5
- Core Binding Factor Alpha 2 Subunit/genetics
- Female
- Humans
- In Situ Hybridization, Fluorescence
- Leukemia, Lymphocytic, Chronic, B-Cell/genetics
- Leukemia, Lymphocytic, Chronic, B-Cell/pathology
- Middle Aged
- Myelodysplastic Syndromes/diagnosis
- Myelodysplastic Syndromes/etiology
- Oncogene Proteins, Fusion/genetics
- Sequence Analysis, DNA
- Translocation, Genetic
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Affiliation(s)
- Ioannis Panagopoulos
- Section for Cancer Cytogenetics, Institute for Cancer Genetics and Informatics, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway
- * E-mail:
| | - Ludmila Gorunova
- Section for Cancer Cytogenetics, Institute for Cancer Genetics and Informatics, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway
| | | | - Kristin Andersen
- Section for Cancer Cytogenetics, Institute for Cancer Genetics and Informatics, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway
| | - Francesca Micci
- Section for Cancer Cytogenetics, Institute for Cancer Genetics and Informatics, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway
| | - Sverre Heim
- Section for Cancer Cytogenetics, Institute for Cancer Genetics and Informatics, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
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12
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Yuan M, Song Y, You D, Li Q, Zhang Y, Zhou B, Zhang L, Xi M. Association between single nucleotide polymorphisms in the programmed cell death 6 gene and the risk of endometrial cancer in Chinese Han women. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2017; 10:11169-11178. [PMID: 31966467 PMCID: PMC6965880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Accepted: 10/14/2017] [Indexed: 06/10/2023]
Abstract
The programmed cell death 6 (PDCD6) gene, originally identified as a pro-apoptotic gene, has recently been reported to have contradictory roles in different diseases and may promote cell proliferation. Here, we examined whether single nucleotide polymorphisms (SNPs) in PDCD6 were associated with endometrial cancer (EC). The genotypes of these two SNPs (rs3756712 and rs4957014) in PDCD6 were distinguished by polymerase chain reaction-restriction fragment length polymorphism in 238 patients with EC and 518 controls. Briefly, the T allele of rs3756712 was found to increase EC risk (P = 0.028, odds ratio [OR] = 0.747). Moreover, EC risk was associated with these two SNPs in different genetic models (P = 0.031, OR = 1.42 for rs3756712 in the dominant model; P = 0.019, OR = 0.63 for rs4957014 in the codominant model; P = 0.0073, OR = 0.65 for rs4957014 in the dominant model; P = 0.0076, OR = 0.66 for rs4957014 in the overdominant model). Results of stratified analyses revealed that rs4957012 was linked to body mass index (BMI) and parametrial invasion and that rs4957014 was associated with BMI, although this associated was not statistically significant (P = 0.065, OR = 4.42, 95% confidence interval = 1.06-18.51). Our results indicated that these two tag SNPs in PDCD6 were associated with EC, suggesting that PDCD6 may play a crucial role in the tumorigenesis of EC.
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Affiliation(s)
- Mingwei Yuan
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan UniversityChengdu, Sichuan, PR China
| | - Yaping Song
- Laboratory of Molecular Translational Medicine, West China Institute of Women and Children’s Health, Key Laboratory of Obstetric & Gynecologic and Pediatric Diseases and Birth Defects of Ministry of Education, West China Second University Hospital, Sichuan UniversityChengdu, Sichuan, PR China
| | - Di You
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan UniversityChengdu, Sichuan, PR China
| | - Qin Li
- Department of Immunology, West China School of Preclinical and Forensic Medicine, Sichuan UniversityChengdu, Sichuan, PR China
| | - Yan Zhang
- Department of Pathology, West China Second University Hospital, Sichuan UniversityChengdu, Sichuan, PR China
| | - Bin Zhou
- Laboratory of Molecular Translational Medicine, West China Institute of Women and Children’s Health, Key Laboratory of Obstetric & Gynecologic and Pediatric Diseases and Birth Defects of Ministry of Education, West China Second University Hospital, Sichuan UniversityChengdu, Sichuan, PR China
| | - Lin Zhang
- Department of Immunology, West China School of Preclinical and Forensic Medicine, Sichuan UniversityChengdu, Sichuan, PR China
| | - Mingrong Xi
- Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan UniversityChengdu, Sichuan, PR China
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13
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Yuan L, Li S, Zhou Q, Wang D, Zou D, Shu J, Huang Y. MiR-124 inhibits invasion and induces apoptosis of ovarian cancer cells by targeting programmed cell death 6. Oncol Lett 2017; 14:7311-7317. [PMID: 29344168 PMCID: PMC5754840 DOI: 10.3892/ol.2017.7157] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2016] [Accepted: 07/14/2017] [Indexed: 11/13/2022] Open
Abstract
Epithelial ovarian cancer remains the most common type of malignant tumor of the female reproductive system worldwide. Routine surgery and chemotherapy are the best treatments available for patients with ovarian cancer; however, almost 40% of ovarian cancer cases are intractable, with poor 5-year survival rates. MicroRNAs (miRNA) are endogenous small non-coding RNA molecules that function in transcriptional and post-transcriptional regulation of gene expression in various cellular processes. Recent studies demonstrated that microRNA (miR)-124 was downregulated in numerous types of tumors; however, the function and mechanism underlying miR-124 in epithelial ovarian cancer remain unclear. The present study revealed that miR-124 may be significantly downregulated in epithelial ovarian cancer. Using prediction algorithms and luciferase reporter gene assays, the present study identified and confirmed programmed cell death 6 (PDCD6) as a novel, direct target of miR-124. Overexpression of miR-124 suppressed PDCD6 expression, inhibited cell proliferation, migration and invasion, and induced apoptosis in SKOV3 and OCVAR3 cells in vitro. In the present study, overexpression of PDCD6 in epithelial ovarian cancer cells co-transfected with miR-124 effectively reversed the miR-124-induced apoptosis. Therefore, the results of the present study suggested that miR-124 is a tumor suppressor miRNA and a potential target for future treatment of ovarian malignant neoplasms.
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Affiliation(s)
- Li Yuan
- Department of Radiological Medicine, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Shaolin Li
- Department of Radiological Medicine, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Qi Zhou
- Department of Gynecologic Oncology, Chongqing Cancer Institute, Chongqing 400030, P.R. China
| | - Dong Wang
- Department of Gynecologic Oncology, Chongqing Cancer Institute, Chongqing 400030, P.R. China
| | - Dongling Zou
- Department of Gynecologic Oncology, Chongqing Cancer Institute, Chongqing 400030, P.R. China
| | - Jin Shu
- Department of Gynecologic Oncology, Chongqing Cancer Institute, Chongqing 400030, P.R. China
| | - Yu Huang
- Department of Gynecologic Oncology, Chongqing Cancer Institute, Chongqing 400030, P.R. China
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14
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Zhang D, Wang F, Pang Y, Zhao E, Zhu S, Chen F, Cui H. ALG2 regulates glioblastoma cell proliferation, migration and tumorigenicity. Biochem Biophys Res Commun 2017; 486:300-306. [PMID: 28300556 DOI: 10.1016/j.bbrc.2017.03.032] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 03/11/2017] [Indexed: 12/22/2022]
Abstract
Apoptosis-linked gene-2 (ALG-2), also known as programmed cell death 6 (PDCD6), has recently been reported to be aberrantly expressed in various tumors and required for tumor cell viability. The aim of the present study was to investigate whether ALG-2 plays a crucial role in tumor cell proliferation, migration and tumorigenicity. In this study, we examined the expression of PDCD6 in glioblastoma cell lines and found that ALG-2 was generally expressed in glioblastoma cell lines. We also performed an analysis of an online database and found that high expression of ALG-2 was associated with poor prognosis (p = 0.039). We found that over-expression of ALG2 in glioblastoma could inhibit cell proliferation and, conversely, that down-regulation of ALG2 could promote cell proliferation. Further studies showed that over-expression of ALG2 inhibited the migration of tumor cells, whereas down-regulation of ALG2 promoted tumor cell migration. Finally, in vitro and in vivo studies showed that over-expression of ALG2 inhibited the tumorigenic ability of tumor cells, while down-regulation of ALG2 promoted tumor cell tumorigenic ability. In conclusion, ALG2 has a tumor suppressive role in glioblastoma and might be a potential target for the treatment of glioblastoma.
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Affiliation(s)
- Dunke Zhang
- State Key Laboratory of Silkworm Genome Biology, The Institute of Sericulture and Systems Biology, Southwest University, Chongqing 400716, China
| | - Feng Wang
- State Key Laboratory of Silkworm Genome Biology, The Institute of Sericulture and Systems Biology, Southwest University, Chongqing 400716, China
| | - Yi Pang
- State Key Laboratory of Silkworm Genome Biology, The Institute of Sericulture and Systems Biology, Southwest University, Chongqing 400716, China
| | - Erhu Zhao
- State Key Laboratory of Silkworm Genome Biology, The Institute of Sericulture and Systems Biology, Southwest University, Chongqing 400716, China
| | - Sunqin Zhu
- State Key Laboratory of Silkworm Genome Biology, The Institute of Sericulture and Systems Biology, Southwest University, Chongqing 400716, China
| | - Fei Chen
- Department of Pharmaceutical Sciences, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, 259 Mack Avenue, Detroit, MI 48201, USA.
| | - Hongjuan Cui
- State Key Laboratory of Silkworm Genome Biology, The Institute of Sericulture and Systems Biology, Southwest University, Chongqing 400716, China.
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15
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Ma J, Zhang X, Feng Y, Zhang H, Wang X, Zheng Y, Qiao W, Liu X. Structural and Functional Study of Apoptosis-linked Gene-2·Heme-binding Protein 2 Interactions in HIV-1 Production. J Biol Chem 2016; 291:26670-26685. [PMID: 27784779 DOI: 10.1074/jbc.m116.752444] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Revised: 10/01/2016] [Indexed: 01/10/2023] Open
Abstract
In the HIV-1 replication cycle, the endosomal sorting complex required for transport (ESCRT) machinery promotes viral budding and release in the late stages. In this process, the ESCRT proteins, ALIX and TSG101, are recruited through interactions with HIV-1 Gag p6. ALG-2, also known as PDCD6, interacts with both ALIX and TSG101 and bridges ESCRT-III and ESCRT-I. In this study, we show that ALG-2 affects HIV-1 production negatively at both the exogenous and endogenous levels. Through a yeast two-hybrid screen, we identified HEBP2 as the binding partner of ALG-2, and we solved the crystal structure of the ALG-2·HEBP2 complex. The function of ALG-2·HEBP2 complex in HIV-1 replication was further explored. ALG-2 inhibits HIV-1 production by affecting Gag expression and distribution, and HEBP2 might aid this process by tethering ALG-2 in the cytoplasm.
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Affiliation(s)
- Jing Ma
- From the State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin 300071.,the Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Xianfeng Zhang
- the CAAS-Michigan State University Joint Laboratory of Innate Immunity, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150069, and
| | - Yanbin Feng
- From the State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin 300071
| | - Hui Zhang
- From the State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin 300071
| | - Xiaojun Wang
- the CAAS-Michigan State University Joint Laboratory of Innate Immunity, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150069, and
| | - Yonghui Zheng
- the CAAS-Michigan State University Joint Laboratory of Innate Immunity, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150069, and
| | - Wentao Qiao
- From the State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin 300071, .,the Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Xinqi Liu
- From the State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin 300071,
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16
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Maki M, Takahara T, Shibata H. Multifaceted Roles of ALG-2 in Ca(2+)-Regulated Membrane Trafficking. Int J Mol Sci 2016; 17:ijms17091401. [PMID: 27571067 PMCID: PMC5037681 DOI: 10.3390/ijms17091401] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 08/18/2016] [Accepted: 08/19/2016] [Indexed: 12/15/2022] Open
Abstract
ALG-2 (gene name: PDCD6) is a penta-EF-hand Ca2+-binding protein and interacts with a variety of proteins in a Ca2+-dependent fashion. ALG-2 recognizes different types of identified motifs in Pro-rich regions by using different hydrophobic pockets, but other unknown modes of binding are also used for non-Pro-rich proteins. Most ALG-2-interacting proteins associate directly or indirectly with the plasma membrane or organelle membranes involving the endosomal sorting complex required for transport (ESCRT) system, coat protein complex II (COPII)-dependent ER-to-Golgi vesicular transport, and signal transduction from membrane receptors to downstream players. Binding of ALG-2 to targets may induce conformational change of the proteins. The ALG-2 dimer may also function as a Ca2+-dependent adaptor to bridge different partners and connect the subnetwork of interacting proteins.
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Affiliation(s)
- Masatoshi Maki
- Department of Applied Molecular Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan.
| | - Terunao Takahara
- Department of Applied Molecular Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan.
| | - Hideki Shibata
- Department of Applied Molecular Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan.
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17
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Dashzeveg N, Yogosawa S, Yoshida K. Transcriptional induction of protein kinase C delta by p53 tumor suppressor in the apoptotic response to DNA damage. Cancer Lett 2016; 374:167-174. [DOI: 10.1016/j.canlet.2016.02.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Revised: 01/05/2016] [Accepted: 02/04/2016] [Indexed: 10/22/2022]
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18
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Briffa R, Um I, Faratian D, Zhou Y, Turnbull AK, Langdon SP, Harrison DJ. Multi-Scale Genomic, Transcriptomic and Proteomic Analysis of Colorectal Cancer Cell Lines to Identify Novel Biomarkers. PLoS One 2015; 10:e0144708. [PMID: 26678268 PMCID: PMC4692059 DOI: 10.1371/journal.pone.0144708] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 11/23/2015] [Indexed: 12/18/2022] Open
Abstract
Selecting colorectal cancer (CRC) patients likely to respond to therapy remains a clinical challenge. The objectives of this study were to establish which genes were differentially expressed with respect to treatment sensitivity and relate this to copy number in a panel of 15 CRC cell lines. Copy number variations of the identified genes were assessed in a cohort of CRCs. IC50's were measured for 5-fluorouracil, oxaliplatin, and BEZ-235, a PI3K/mTOR inhibitor. Cell lines were profiled using array comparative genomic hybridisation, Illumina gene expression analysis, reverse phase protein arrays, and targeted sequencing of KRAS hotspot mutations. Frequent gains were observed at 2p, 3q, 5p, 7p, 7q, 8q, 12p, 13q, 14q, and 17q and losses at 2q, 3p, 5q, 8p, 9p, 9q, 14q, 18q, and 20p. Frequently gained regions contained EGFR, PIK3CA, MYC, SMO, TRIB1, FZD1, and BRCA2, while frequently lost regions contained FHIT and MACROD2. TRIB1 was selected for further study. Gene enrichment analysis showed that differentially expressed genes with respect to treatment response were involved in Wnt signalling, EGF receptor signalling, apoptosis, cell cycle, and angiogenesis. Stepwise integration of copy number and gene expression data yielded 47 candidate genes that were significantly correlated. PDCD6 was differentially expressed in all three treatment responses. Tissue microarrays were constructed for a cohort of 118 CRC patients and TRIB1 and MYC amplifications were measured using fluorescence in situ hybridisation. TRIB1 and MYC were amplified in 14.5% and 7.4% of the cohort, respectively, and these amplifications were significantly correlated (p≤0.0001). TRIB1 protein expression in the patient cohort was significantly correlated with pERK, Akt, and Caspase 3 expression. In conclusion, a set of candidate predictive biomarkers for 5-fluorouracil, oxaliplatin, and BEZ235 are described that warrant further study. Amplification of the putative oncogene TRIB1 has been described for the first time in a cohort of CRC patients.
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Affiliation(s)
- Romina Briffa
- Division of Pathology, Institute of Genetics and Molecular Medicine,
University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XU, United
Kingdom
| | - Inhwa Um
- School of Medicine, University of St Andrews, St Andrews, KY16 9TF, United
Kingdom
| | - Dana Faratian
- Division of Pathology, Institute of Genetics and Molecular Medicine,
University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XU, United
Kingdom
| | - Ying Zhou
- Division of Pathology, Institute of Genetics and Molecular Medicine,
University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XU, United
Kingdom
| | - Arran K. Turnbull
- Division of Pathology, Institute of Genetics and Molecular Medicine,
University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XU, United
Kingdom
| | - Simon P. Langdon
- Division of Pathology, Institute of Genetics and Molecular Medicine,
University of Edinburgh, Crewe Road South, Edinburgh, EH4 2XU, United
Kingdom
| | - David J. Harrison
- School of Medicine, University of St Andrews, St Andrews, KY16 9TF, United
Kingdom
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19
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Xu H, Wang X, Malam N, Lackner AA, Veazey RS. Persistent Simian Immunodeficiency Virus Infection Causes Ultimate Depletion of Follicular Th Cells in AIDS. THE JOURNAL OF IMMUNOLOGY 2015; 195:4351-7. [PMID: 26408660 DOI: 10.4049/jimmunol.1501273] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Accepted: 08/31/2015] [Indexed: 02/06/2023]
Abstract
CD4(+) T follicular helper (Tfh) cells are critical for the generation of humoral immune responses to pathogenic infections, providing help for B cell development, survival, and affinity maturation of Abs. Although CD4(+) Tfh cells are reported to accumulate in HIV or SIV infection, we found that germinal center Tfh cells, defined in this study as CXCR5(+)PD-1(HIGH)CD4(+) T cells, did not consistently accumulate in chronically SIV-infected rhesus macaques compared with those infected with less pathogenic simian HIV, vaccinated and SIVmac-challenged, or SIVmac-infected Mamu-A*01(+) macaques, all of which are associated with some control of virus replication and slower disease progression. Interestingly, CXCR5(+)PD-1(HIGH) Tfh cells in lymphoid tissues were eventually depleted in macaques with AIDS compared with the other cohorts. Chronic activation and proliferation of CXCR5(+)PD-1(HIGH) Tfh were increased, but PD-L2 expression was downregulated on B cells, possibly resulting in germinal center Tfh cell apoptosis. Together, these findings suggest that changes in CXCR5(+)PD-1(HIGH) Tfh cells in lymph nodes correlate with immune control during infection, and their loss or dysregulation contribute to impairment of B cell responses and progression to AIDS.
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Affiliation(s)
- Huanbin Xu
- Tulane National Primate Research Center, Tulane University School of Medicine, Covington, LA 70433
| | - Xiaolei Wang
- Tulane National Primate Research Center, Tulane University School of Medicine, Covington, LA 70433
| | - Naomi Malam
- Tulane National Primate Research Center, Tulane University School of Medicine, Covington, LA 70433
| | - Andrew A Lackner
- Tulane National Primate Research Center, Tulane University School of Medicine, Covington, LA 70433
| | - Ronald S Veazey
- Tulane National Primate Research Center, Tulane University School of Medicine, Covington, LA 70433
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20
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Structural analysis of the complex between penta-EF-hand ALG-2 protein and Sec31A peptide reveals a novel target recognition mechanism of ALG-2. Int J Mol Sci 2015; 16:3677-99. [PMID: 25667979 PMCID: PMC4346919 DOI: 10.3390/ijms16023677] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Accepted: 01/30/2015] [Indexed: 02/07/2023] Open
Abstract
ALG-2, a 22-kDa penta-EF-hand protein, is involved in cell death, signal transduction, membrane trafficking, etc., by interacting with various proteins in mammalian cells in a Ca2+-dependent manner. Most known ALG-2-interacting proteins contain proline-rich regions in which either PPYPXnYP (type 1 motif) or PXPGF (type 2 motif) is commonly found. Previous X-ray crystal structural analysis of the complex between ALG-2 and an ALIX peptide revealed that the peptide binds to the two hydrophobic pockets. In the present study, we resolved the crystal structure of the complex between ALG-2 and a peptide of Sec31A (outer shell component of coat complex II, COPII; containing the type 2 motif) and found that the peptide binds to the third hydrophobic pocket (Pocket 3). While amino acid substitution of Phe85, a Pocket 3 residue, with Ala abrogated the interaction with Sec31A, it did not affect the interaction with ALIX. On the other hand, amino acid substitution of Tyr180, a Pocket 1 residue, with Ala caused loss of binding to ALIX, but maintained binding to Sec31A. We conclude that ALG-2 recognizes two types of motifs at different hydrophobic surfaces. Furthermore, based on the results of serial mutational analysis of the ALG-2-binding sites in Sec31A, the type 2 motif was newly defined.
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21
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You C, Yang Y, Zhang L, Chen H, Chen Y, Chen K, Zhou Y. Comparative proteomics analysis of global cellular stress responses to hydroxyurea-induced DNA damage in HeLa cells. Cytotechnology 2014; 68:809-20. [PMID: 25519465 DOI: 10.1007/s10616-014-9832-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Accepted: 11/29/2014] [Indexed: 10/24/2022] Open
Abstract
Both environmental agents and spontaneous cellular events cause serious DNA damage, threatening the integrity of the genome. In response to replication stress or genotoxic agents triggered DNA damage, degradation of p12 subunit of DNA polymerase delta (Pol δ) results in an inter-conversion between heterotetramer (Pol δ4) and heterotrimer (Pol δ3) forms and plays a significant role in DNA damage response in eukaryotic cells. In this work, we used mass spectrometry-based proteomic approach to identify those cellular stress response protein changes corresponding to the degradation of p12 in DNA-damaged HeLa cells by the treatment with hydroxyurea (HU). A total of 736 ± 13 proteins in non-treated control group and 741 ± 19 protein spots in HU-treated cells were detected, of which 34 proteins (17 up-regulated and 17 down-regulated) exhibited significantly altered protein expression levels. Their physiological roles are mainly associated with cellular components, molecular functions, and biological processes by gene ontology analysis, among which 21 proteins were mapped to KEGG pathways. They are involved in 5 primary pathways with the subsets involving 16 secondary pathways by further KEGG analysis. More interestingly, the up-regulation of translationally controlled tumor protein was further identified to be associated with p12 degradation by Western blot analysis. Our works may enlarge and broaden our view for deeply understanding how global cellular stress responds to DNA damage, which could contribute to the etiology of human cancer or other diseases that can result from loss of genomic stability.
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Affiliation(s)
- Chao You
- Institute of Life Sciences, Jiangsu University, 301# Xuefu Road, Zhenjiang, 212013, China
| | - Yanhua Yang
- Institute of Life Sciences, Jiangsu University, 301# Xuefu Road, Zhenjiang, 212013, China
| | - Lei Zhang
- Institute of Life Sciences, Jiangsu University, 301# Xuefu Road, Zhenjiang, 212013, China
| | - Huiqing Chen
- Institute of Life Sciences, Jiangsu University, 301# Xuefu Road, Zhenjiang, 212013, China
| | - Yan Chen
- Institute of Life Sciences, Jiangsu University, 301# Xuefu Road, Zhenjiang, 212013, China
| | - Keping Chen
- Institute of Life Sciences, Jiangsu University, 301# Xuefu Road, Zhenjiang, 212013, China
| | - Yajing Zhou
- Institute of Life Sciences, Jiangsu University, 301# Xuefu Road, Zhenjiang, 212013, China.
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22
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Waters KM, Cummings BS, Shankaran H, Scholpa NE, Weber TJ. ERK oscillation-dependent gene expression patterns and deregulation by stress response. Chem Res Toxicol 2014; 27:1496-503. [PMID: 25068892 PMCID: PMC4163986 DOI: 10.1021/tx500085u] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
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Studies were undertaken to determine
whether extracellular signal
regulated kinase (ERK) oscillations regulate a unique subset of genes
in human keratinocytes and subsequently whether the p38 stress response
inhibits ERK oscillations. A DNA microarray identified many genes
that were unique to ERK oscillations, and network reconstruction predicted
an important role for the mediator complex subunit 1 (MED1) node in
mediating ERK oscillation-dependent gene expression. Increased ERK-dependent
phosphorylation of MED1 was observed in oscillating cells compared
to nonoscillating counterparts as validation. Treatment of keratinocytes
with a p38 inhibitor (SB203580) increased ERK oscillation amplitudes
and MED1 and phospho-MED1 protein levels. Bromate is a probable human
carcinogen that activates p38. Bromate inhibited ERK oscillations
in human keratinocytes and JB6 cells and induced an increase in phospho-p38
and a decrease in phospho-MED1 protein levels. Treatment of normal
rat kidney cells and primary salivary gland epithelial cells with
bromate decreased phospho-MED1 levels in a reversible fashion upon
treatment with p38 inhibitors (SB202190; SB203580). Our results indicate
that oscillatory behavior in the ERK pathway alters homeostatic gene
regulation patterns and that the cellular response to perturbation
may manifest differently in oscillating vs nonoscillating cells.
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Affiliation(s)
- Katrina M Waters
- Computational Biology and Bioinformatics, ‡Systems Toxicology and Exposure Science, Pacific Northwest National Laboratory , Richland, Washington 99352, United States
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23
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Nakazawa K, Dashzeveg N, Yoshida K. Tumor suppressor p53 induces miR-1915 processing to inhibit Bcl-2 in the apoptotic response to DNA damage. FEBS J 2014; 281:2937-44. [PMID: 24814047 DOI: 10.1111/febs.12831] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Revised: 04/22/2014] [Accepted: 05/02/2014] [Indexed: 01/07/2023]
Abstract
The antiapoptotic protein Bcl-2 is overexpressed in human cancers, and confers resistance to antitumor agents in cancer cells. Bcl-2 is negatively regulated by the tumor suppressor p53 in response to DNA damage during apoptotic cell death. However, this molecular mechanism remains unclear. The available evidence indicates that miR-1915 represses Bcl-2 expression at the post-transcriptional level in human colorectal carcinoma cells, which is correlated with drug resistance. Here, we show that p53 controls miR-1915 expression in response to DNA damage. Induction of p53 affects the expression of precursor and mature, but not primary, miR-1915. Inhibition of miR-1915 abrogates downregulation of Bcl-2 expression following treatment with genotoxin. These findings demonstrate that p53 negatively regulates Bcl-2 expression by targeting miR-1915 processing from primary into precursor miRNA. Taken together, the findings of the current study reveal a novel mechanism whereby p53 negatively modulates Bcl-2 by controlling miR-1915.
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Affiliation(s)
- Kazuya Nakazawa
- Department of Biochemistry, The Jikei University School of Medicine, Tokyo, Japan; Medical Research Institute, Tokyo Medical and Dental University, Japan
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24
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Dashzeveg N, Taira N, Lu ZG, Kimura J, Yoshida K. Palmdelphin, a novel target of p53 with Ser46 phosphorylation, controls cell death in response to DNA damage. Cell Death Dis 2014; 5:e1221. [PMID: 24810057 PMCID: PMC4047856 DOI: 10.1038/cddis.2014.176] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 03/19/2014] [Accepted: 03/26/2014] [Indexed: 12/22/2022]
Abstract
The tumor suppressor gene p53 regulates apoptosis in response to DNA damage. Promoter selectivity of p53 depends on mainly its phosphorylation. Particularly, the phosphorylation at serine-46 of p53 is indispensable in promoting pro-apoptotic genes that are, however, poorly determined. In the current study, we identified palmdelphin as a pro-apoptotic gene induced by p53 in a phosphorylated serine-46-specific manner. Upregulation of palmdelphin was observed in wild-type p53-transfected cells, but not in serine-46-mutated cells. Expression of palmdelphin was induced by p53 in response to DNA damage. In turn, palmdelphin induced apoptosis. Intriguingly, downregulation of palmdelphin resulted in necroptosis-like cell death via ATP depletion. Upon DNA damage, palmdelphin dominantly accumulated in the nucleus to induce apoptosis. These findings define palmdelphin as a target of serine-46-phosphorylated p53 that controls cell death in response to DNA damage.
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Affiliation(s)
- N Dashzeveg
- 1] Department of Biochemistry, The Jikei University School of Medicine, 3-25-8, Nishi-Shinbashi, Minato-ku, Japan [2] Department of Molecular Genetics, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Japan
| | - N Taira
- Department of Biochemistry, The Jikei University School of Medicine, 3-25-8, Nishi-Shinbashi, Minato-ku, Japan
| | - Z-G Lu
- Department of Molecular Genetics, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Japan
| | - J Kimura
- Department of Molecular Genetics, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Japan
| | - K Yoshida
- Department of Biochemistry, The Jikei University School of Medicine, 3-25-8, Nishi-Shinbashi, Minato-ku, Japan
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25
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Zhou B, Zhang P, Tang T, Zhang K, Wang Y, Song Y, Liao H, Zhang L. Prognostic value of PDCD6 polymorphisms and the susceptibility to bladder cancer. Tumour Biol 2014; 35:7547-54. [PMID: 24792888 DOI: 10.1007/s13277-014-2010-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Accepted: 04/23/2014] [Indexed: 11/26/2022] Open
Abstract
Programmed cell death 6 (PDCD6) has recently been found dysregulated in tumors of various origin. The aim of this study is to explore the association between PDCD6 genetic polymorphisms and susceptibility to bladder cancer and survival of patients with bladder cancer. Two tag SNPs of PDCD6, rs3756712 and rs4957014, were genotyped in 332 patients with bladder cancer and 509 controls by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method and correlated with patients' survival. The frequencies of G allele and GG genotype of rs3756712 in patients were significantly lower than that of controls (P = 0.001, odds ratio [OR] = 0.68 for G allele; P = 0.024, OR = 0.53 for GG genotype in the recessive genetic model, respectively). The GT genotype of rs4957014 was associated with decreased susceptibility to bladder cancer in the overdominant genetic model (P = 0.023, OR = 0.72). Kaplan-Meier curves revealed a significant higher risk for death in superficial bladder cancer patients harboring GG homozygous of rs3756712 (P < 0.001), and an increased risk for recurrence in invasive bladder cancer patients carrying GT heterozygous of rs4957014 (P = 0.04). Multiple Cox regression analysis identified rs3756712 GG genotype as an independent prognostic factor for death in superficial bladder cancer patients (hazard ratio [HR] = 5.11, P = 0.01), and rs4957014 GT genotype as an independent prognostic factor for recurrence in invasive bladder cancer patients (HR = 1.93, P = 0.03). PDCD6 may represent a biomarker candidate gene that could help to identify a group of patients at high risk for recurrence and death.
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Affiliation(s)
- Bin Zhou
- Laboratory of Molecular Translational Medicine, West China Institute of Women and Children's Health, Key Laboratory of Obstetric and Gynecologic and Pediatric Diseases and Birth Defects of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, 610041, China
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26
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Kedracka-Krok S, Jankowska U, Elas M, Sowa U, Swakon J, Cierniak A, Olko P, Romanowska-Dixon B, Urbanska K. Proteomic analysis of proton beam irradiated human melanoma cells. PLoS One 2014; 9:e84621. [PMID: 24392146 PMCID: PMC3879347 DOI: 10.1371/journal.pone.0084621] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Accepted: 11/26/2013] [Indexed: 12/19/2022] Open
Abstract
Proton beam irradiation is a form of advanced radiotherapy providing superior distributions of a low LET radiation dose relative to that of photon therapy for the treatment of cancer. Even though this clinical treatment has been developing for several decades, the proton radiobiology critical to the optimization of proton radiotherapy is far from being understood. Proteomic changes were analyzed in human melanoma cells treated with a sublethal dose (3 Gy) of proton beam irradiation. The results were compared with untreated cells. Two-dimensional electrophoresis was performed with mass spectrometry to identify the proteins. At the dose of 3 Gy a minimal slowdown in proliferation rate was seen, as well as some DNA damage. After allowing time for damage repair, the proteomic analysis was performed. In total 17 protein levels were found to significantly (more than 1.5 times) change: 4 downregulated and 13 upregulated. Functionally, they represent four categories: (i) DNA repair and RNA regulation (VCP, MVP, STRAP, FAB-2, Lamine A/C, GAPDH), (ii) cell survival and stress response (STRAP, MCM7, Annexin 7, MVP, Caprin-1, PDCD6, VCP, HSP70), (iii) cell metabolism (TIM, GAPDH, VCP), and (iv) cytoskeleton and motility (Moesin, Actinin 4, FAB-2, Vimentin, Annexin 7, Lamine A/C, Lamine B). A substantial decrease (2.3 x) was seen in the level of vimentin, a marker of epithelial to mesenchymal transition and the metastatic properties of melanoma.
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Affiliation(s)
- Sylwia Kedracka-Krok
- Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
- Malopolska Centre of Biotechnology, Krakow, Poland
| | - Urszula Jankowska
- Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
- Malopolska Centre of Biotechnology, Krakow, Poland
| | - Martyna Elas
- Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Urszula Sowa
- Institute of Nuclear Physics, PAS, Kraków, Poland
| | - Jan Swakon
- Institute of Nuclear Physics, PAS, Kraków, Poland
| | - Agnieszka Cierniak
- Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Pawel Olko
- Institute of Nuclear Physics, PAS, Kraków, Poland
| | - Bozena Romanowska-Dixon
- Department of Ophthalmology and Ophthalmic Oncology, Jagiellonian University Medical College, Kraków, Poland
| | - Krystyna Urbanska
- Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
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Mammalian ESCRT-III-related protein IST1 has a distinctive met-pro repeat sequence that is essential for interaction with ALG-2 in the presence of Ca2+. Biosci Biotechnol Biochem 2013; 77:1049-54. [PMID: 23649269 DOI: 10.1271/bbb.130022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
ALG-2 is an EF-hand-type Ca(2+)-binding protein that interacts with a variety of intracellular proteins that possess Pro-rich regions (PRRs) in mammalian cells. IST1 is an endosomal sorting complex required for transport (ESCRT)-III-related charged multivesicular body protein (CHMP)-like protein, but unlike other ESCRT-III proteins, mammalian IST1 has a PRR and a distinctive sequence of Met-Pro repeats. We found that ALG-2 binds to IST1 by Far-Western analysis using biotinylated ALG-2 as probe, and that the Met-Pro repeat sequence is essential for interaction. The results of pulldown assays using Strep-tagged ALG-2 and lysates of cells expressing GFP-fused IST1 proteins indicated that the binding of ALG-2 to IST1 is Ca(2+)-dependent, and that it is enhanced by co-expression with CHMP1 proteins. Moreover, pulldown assays using various mutants of GST-ALG-2 revealed that the ability of IST1 to bind to mutants is different from those of known ALG-2-interacting proteins, suggesting that IST1 binds to ALG-2 by a different mode of recognition.
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