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Khan K, Albalawi K, Abbas MN, Burki S, Musad Saleh EA, Al Mouslem A, Alsaiari AA, A Zaki ME, Khan AU, Alotaibi G, Jalal K. Pharmacokinetics and drug-likeness of anti-cancer traditional Chinese medicine: molecular docking and molecular dynamics simulation study. J Biomol Struct Dyn 2024; 42:3295-3306. [PMID: 37279114 DOI: 10.1080/07391102.2023.2216758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 05/03/2023] [Indexed: 06/08/2023]
Abstract
MCM7 (Minichromosome Maintenance Complex Component 7) is a component of the DNA replication licensing factor, which controls DNA replication. The MCM7 protein is linked to tumor cell proliferation and has a function in the development of several human cancers. Several types of cancer may be treated by inhibiting the protein, as it is strongly produced throughout this process. Significantly, Traditional Chinese Medicine (TCM), which has a long history of clinical adjuvant use against cancer, is rapidly gaining traction as a valuable medical resource for the development of novel cancer therapies, including immunotherapy. Therefore, the goal of the research was to find small molecular therapeutic candidates against the MCM7 protein that may be used to treat human cancers. A computational-based virtual screening of 36,000 natural TCM libraries is carried out for this goal using a molecular docking and dynamic simulation technique. Thereby, ∼8 novel potent compounds i.e., ZINC85542762, ZINC95911541, ZINC85542617, ZINC85542646, ZINC85592446, ZINC85568676, ZINC85531303, and ZINC95914464 were successfully shortlisted, each having the capacity to penetrate the cell as potent inhibitors for MCM7 to curb this disorder. These selected compounds were found to have high binding affinities compared to the reference (AGS compound) i.e. < -11.0 kcal/mol. ADMET and pharmacological properties showed that none of these 8 compounds poses any toxic property (carcinogenicity) and have anti-metastatic, and anticancer activity. Additionally, MD simulations were run to assess the compounds' stability and dynamic behavior with the MCM7 complex for about 100 ns. Finally, ZINC95914464, ZINC95911541, ZINC85568676, ZINC85592446, ZINC85531303, and ZINC85542646 are identified as highly stable within the complex throughout the 100 ns simulations. Moreover, the results of binding free energy suggested that the selected virtual hits significantly bind to the MCM7 which implied these compounds may act as a potential MCM7 inhibitor. However, in vitro testing protocols are required to further support these results. Further, assessment through various lab-based trial methods can assist with deciding the action of the compound that will give options in contrast to human cancer immunotherapy.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Kanwal Khan
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Karma Albalawi
- Department of Chemistry, Faculty of Science, University of Tabuk, Tabuk, Saudi Arabia
| | | | - Samiullah Burki
- Institute of Pharmaceutical Sciences, Jinnah Sindh medical University, Karachi, Pakistan
| | - Ebraheem Abdu Musad Saleh
- Chemistry Department, College of Arts & Science, Prince Sattam Bin Abdulaziz University, Wadi Al-Dawasir, Saudi Arabia
| | - Abdulaziz Al Mouslem
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Saudi Arabia
| | - Ahad Amer Alsaiari
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, Taif, Saudi Arabia
| | - Magdi E A Zaki
- Department of Chemistry, Faculty of Science, Imam Mohammad Ibn Saud Islamic University, Riyadh, Saudi Arabia
| | - Afaq Ullah Khan
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, PR China
| | - Ghallab Alotaibi
- Department of Pharmaceutical Sciences, College of Pharmacy, Shaqra University, Shaqra, KSA
| | - Khurshid Jalal
- HEJ Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
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Selvan TG, Gollapalli P, Kumar SHS, Ghate SD. Early diagnostic and prognostic biomarkers for gastric cancer: systems-level molecular basis of subsequent alterations in gastric mucosa from chronic atrophic gastritis to gastric cancer. J Genet Eng Biotechnol 2023; 21:86. [PMID: 37594635 PMCID: PMC10439097 DOI: 10.1186/s43141-023-00539-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 07/31/2023] [Indexed: 08/19/2023]
Abstract
PURPOSE It is important to comprehend how the molecular mechanisms shift when gastric cancer in its early stages (GC). We employed integrative bioinformatics approaches to locate various biological signalling pathways and molecular fingerprints to comprehend the pathophysiology of the GC. To facilitate the discovery of their possible biomarkers, a rapid diagnostic may be made, which leads to an improved diagnosis and improves the patient's prognosis. METHODS Through protein-protein interaction networks, functional differentially expressed genes (DEGs), and pathway enrichment studies, we examined the gene expression profiles of individuals with chronic atrophic gastritis and GC. RESULTS A total of 17 DEGs comprising 8 upregulated and 9 down-regulated genes were identified from the microarray dataset from biopsies with chronic atrophic gastritis and GC. These DEGs were primarily enriched for CDK regulation of DNA replication and mitotic M-M/G1 phase pathways, according to KEGG analysis (p > 0.05). We discovered two hub genes, MCM7 and CDC6, in the protein-protein interaction network we obtained for the 17 DEGs (expanded with increased maximum interaction with 110 nodes and 2103 edges). MCM7 was discovered to be up-regulated in GC tissues following confirmation using the GEPIA and Human Protein Atlas databases. CONCLUSION The elevated expression of MCM7 in both chronic atrophic gastritis and GC, as shown by our comprehensive investigation, suggests that this protein may serve as a promising biomarker for the early detection of GC.
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Affiliation(s)
- Tamizh G Selvan
- Central Research Laboratory, K S Hegde Medical Academy, Nitte (Deemed to Be University), Deralakatte, Mangalore, 575018, Karnataka, India
| | - Pavan Gollapalli
- Center for Bioinformatics, University Annexe, Nitte (Deemed to be University), Deralakatte, Mangalore, 575018, Karnataka, India.
| | - Santosh H S Kumar
- Department of Biotechnology, Jnana Sahyadri Campus, Kuvempu University, Shankaraghatta, 577451, Karnataka, India
| | - Sudeep D Ghate
- Center for Bioinformatics, University Annexe, Nitte (Deemed to be University), Deralakatte, Mangalore, 575018, Karnataka, India
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Van Caenegem W, Ceryngier P, Romanowski J, Pfister DH, Haelewaters D. Hesperomyces (Fungi, Ascomycota) associated with Hyperaspis ladybirds (Coleoptera, Coccinellidae): Rethinking host specificity. Front Fungal Biol 2023; 3:1040102. [PMID: 37746211 PMCID: PMC10512334 DOI: 10.3389/ffunb.2022.1040102] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 11/22/2022] [Indexed: 09/26/2023]
Abstract
Laboulbeniales (Ascomycota, Laboulbeniomycetes) are biotrophic microfungi always attached to the exoskeleton of their arthropod hosts. They do not form hyphae or a mycelium; instead, they undergo determinate growth, developing from a two-celled ascospore to form a multicellular thallus. Hesperomyces virescens has been reported on over 30 species of ladybirds (Coleoptera, Coccinellidae); in reality, it represents a complex of species, presumably segregated by host genus association. In this study, we report on Hesperomyces thalli on Hyperaspis vinciguerrae from the Canary Islands and compare them with the Hesperomyces hyperaspidis described on Hyperaspis sp. from Trinidad. We generated the sequences of the internal transcribed spacer (ITS) region, the large subunit (LSU) nuclear ribosomal RNA gene, and the minichromosome maintenance complex component 7 (MCM7) protein-coding gene. Our phylogenetic reconstruction of Hesperomyces based on a concatenated ITS-LSU-MCM7 dataset revealed Hesperomyces sp. ex Hy. vinciguerrae as a member of the He. virescens species complex distinct from He. virescens sensu stricto (s.s.). It also revealed that the Hesperomyces sp. ex Chilocorus bipustulatus from Algeria is different from He. virescens s.s., which is associated with Chilocorus stigma from the USA. This suggests that the species of Hesperomyces are not solely segregated by host association, but that there is also a biogeographical component involved. Based on these data, we refrained from referring our material from Hy. vinciguerrae to He. hyperaspidis. Finally, we discuss the usefulness of MCM7 as a useful marker for species delimitation in Hesperomyces.
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Affiliation(s)
- Warre Van Caenegem
- Research Group Mycology, Department of Biology, Ghent University, Ghent, Belgium
| | - Piotr Ceryngier
- Institute of Biological Sciences, Cardinal Stefan Wyszyński University, Warsaw, Poland
| | - Jerzy Romanowski
- Institute of Biological Sciences, Cardinal Stefan Wyszyński University, Warsaw, Poland
| | - Donald H. Pfister
- Farlow Reference Library and Herbarium of Cryptogamic Botany, Harvard University, Cambridge, MA, United States
| | - Danny Haelewaters
- Research Group Mycology, Department of Biology, Ghent University, Ghent, Belgium
- Faculty of Science, University of South Bohemia, České Budějovice, Czechia
- Biology Centre of the Czech Academy of Sciences, Institute of Entomology, České Budějovice, Czechia
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Sriram N, Mukherjee S, Sah MK. Gene expression profiling and protein-protein interaction analysis reveals the dynamic role of MCM7 in Alzheimer's disorder and breast cancer. 3 Biotech 2022; 12:146. [PMID: 35698583 DOI: 10.1007/s13205-022-03207-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 05/14/2022] [Indexed: 11/01/2022] Open
Abstract
The interrelation of cancer and Alzheimer's disorder (AD)-associated molecular mechanisms, reported last decade, paved the path for drug discoveries. In this direction, while chemotherapy is well established for breast cancer (BC), the detection and targeted therapy for AD is not advanced due to a lack of recognized peripheral biomarkers. The present study aimed to find diagnostic and prognostic molecular signature markers common to both BC and AD for possible drug targeting and repurposing. For these disorders, two corresponding microarray datasets (GSE42568, GSE33000) were used for identifying the differentially expressed genes (DEGs), resulting in recognition of CD209 and MCM7 as the two common players. While the CD209 gene was upregulated in both disorders and has been studied vastly, the MCM7 gene showed a strikingly reverse pattern of expression level, downregulated in the case of BC while upregulated in the case of AD. Thus, the MCM7 gene was further analyzed for expression, predictions, and validations of its structure and protein-protein interaction (PPI) for the possible development of new treatment methods for AD. The study concluded with indicative drug repurposing studies to check the effect of existing clinically approved drugs for BC for rectifying the expression levels of the mutated MCM7 gene in AD. Supplementary Information The online version contains supplementary material available at 10.1007/s13205-022-03207-1.
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Affiliation(s)
- Navneeth Sriram
- Department of Biotechnology, Dr. B. R. Ambedkar National Institute of Technology, Jalandhar, Punjab 144011 India
| | - Sunny Mukherjee
- Department of Biotechnology, Dr. B. R. Ambedkar National Institute of Technology, Jalandhar, Punjab 144011 India
| | - Mahesh Kumar Sah
- Department of Biotechnology, Dr. B. R. Ambedkar National Institute of Technology, Jalandhar, Punjab 144011 India
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Guerra B, Doktor TK, Frederiksen SB, Somyajit K, Andresen BS. Essential role of CK2α for the interaction and stability of replication fork factors during DNA synthesis and activation of the S-phase checkpoint. Cell Mol Life Sci 2022; 79:339. [PMID: 35661926 PMCID: PMC9166893 DOI: 10.1007/s00018-022-04374-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 05/09/2022] [Accepted: 05/12/2022] [Indexed: 11/25/2022]
Abstract
The ataxia telangiectasia mutated and Rad3-related (ATR)-CHK1 pathway is the major signalling cascade activated in response to DNA replication stress. This pathway is associated with the core of the DNA replication machinery comprising CDC45, the replicative MCM2-7 hexamer, GINS (altogether forming the CMG complex), primase-polymerase (POLε, -α, and -δ) complex, and additional fork protection factors such as AND-1, CLASPIN (CLSPN), and TIMELESS/TIPIN. In this study, we report that functional protein kinase CK2α is critical for preserving replisome integrity and for mounting S-phase checkpoint signalling. We find that CDC45, CLSPN and MCM7 are novel CK2α interacting partners and these interactions are particularly important for maintenance of stable MCM7-CDC45, ATRIP-ATR-MCM7, and ATR-CLSPN protein complexes. Consistently, cells depleted of CK2α and treated with hydroxyurea display compromised replisome integrity, reduced chromatin binding of checkpoint mediator CLSPN, attenuated ATR-mediated S-phase checkpoint and delayed recovery of stalled forks. In further support of this, differential gene expression analysis by RNA-sequencing revealed that down-regulation of CK2α accompanies global shutdown of genes that are implicated in the S-phase checkpoint. These findings add to our understanding of the molecular mechanisms involved in DNA replication by showing that the protein kinase CK2α is essential for maintaining the stability of the replisome machinery and for optimizing ATR-CHK1 signalling activation upon replication stress.
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Affiliation(s)
- Barbara Guerra
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark.
| | - Thomas K Doktor
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
| | - Sabrina B Frederiksen
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
| | - Kumar Somyajit
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
| | - Brage S Andresen
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
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Parvizpour S, Masoudi-Sobhanzadeh Y, Pourseif MM, Barzegari A, Razmara J, Omidi Y. Pharmacoinformatics-based phytochemical screening for anticancer impacts of yellow sweet clover, Melilotus officinalis (Linn.) Pall. Comput Biol Med 2021; 138:104921. [PMID: 34656871 DOI: 10.1016/j.compbiomed.2021.104921] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Revised: 10/03/2021] [Accepted: 10/05/2021] [Indexed: 11/24/2022]
Abstract
To date, much attention has been paid to phytochemicals because of their diverse pharmacological effects on a variety of diseases such as cancer. In this regard, computer-aided drug design, as a cost- and time-effective approach, is primarily applied to investigate the drug candidates before their further costly in vitro and in vivo experimental evaluations. Accordingly, different signaling pathways and proteins can be targeted using such strategies. As a key protein for the initiation of eukaryotic DNA replication, mini-chromosome maintenance complex component 7 (MCM7) overexpression is related to the initiation and progression of aggressive malignancies. The current study was conducted to identify new potential natural compounds from the yellow sweet clover, Melilotus officinalis (Linn.) Pall, by examining the potential of 40 isolated phytochemicals against MCM7 protein. A structure-based pharmacophore model to the protein active site cavity was generated and followed by virtual screening and molecular docking. Overall, four compounds were selected for further evaluation based on their binding affinities. Our analyses revealed that two novel compounds, namely rosmarinic acid (PubChem CID:5281792) and melilotigenin (PubChem CID:14059499) might be druggable and offer safe usage in human. The stability of these two protein-ligand complex structures was confirmed through molecular dynamics simulation. The findings of this study reveal the potential of these two phytochemicals to serve as anticancer agents, while further pharmacological experiments are required to confirm their effectiveness against human cancers.
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Affiliation(s)
- Sepideh Parvizpour
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Yosef Masoudi-Sobhanzadeh
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad M Pourseif
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Abolfazl Barzegari
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Jafar Razmara
- Department of Computer Science, Faculty of Mathematics, Statistics, and Computer Science, University of Tabriz, Tabriz, Iran
| | - Yadollah Omidi
- Department of Pharmaceutical Sciences, College of Pharmacy, Nova Southeastern University, Fort Lauderdale, Florida, United States.
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Alshahrani MY, Alshahrani KM, Tasleem M, Akeel A, Almeleebia TM, Ahmad I, Asiri M, Alshahrani NA, Alabdallah NM, Saeed M. Computational Screening of Natural Compounds for Identification of Potential Anti-Cancer Agents Targeting MCM7 Protein. Molecules 2021; 26:molecules26195878. [PMID: 34641424 PMCID: PMC8510405 DOI: 10.3390/molecules26195878] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 09/18/2021] [Accepted: 09/19/2021] [Indexed: 12/12/2022] Open
Abstract
Minichromosome maintenance complex component 7 (MCM7) is involved in replicative licensing and the synthesis of DNA, and its overexpression is a fascinating biomarker for various cancer types. There is currently no effective agent that can prevent the development of cancer caused by the MCM7 protein. However, on the molecular level, inhibiting MCM7 lowers cancer-related cellular growth. With this purpose, this study screened 452 biogenic compounds extracted from the UEFS Natural Products dataset against MCM protein by using the in silico art of technique. The hit compounds UEFS99, UEFS137, and UEFS428 showed good binding with the MCM7 protein with binding energy values of −9.95, −8.92, and −8.71 kcal/mol, which was comparatively higher than that of the control compound ciprofloxacin (−6.50). The hit (UEFS99) with the minimum binding energy was picked for molecular dynamics (MD) simulation investigation, and it demonstrated stability at 30 ns. Computational prediction of physicochemical property evaluation revealed that these hits are non-toxic and have good drug-likeness features. It is suggested that hit compounds UEFS99, UEFS137, and UEFS428 pave the way for further bench work validation in novel inhibitor development against MCM7 to fight the cancers.
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Affiliation(s)
- Mohammad Y. Alshahrani
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Khalid University, P.O. Box 61413, Abha 62529, Saudi Arabia; (M.Y.A.); (I.A.); (M.A.)
| | - Kholoud M. Alshahrani
- College of Medicine, King Khalid University Abha, P.O. Box 61413, Abha 62529, Saudi Arabia; (K.M.A.); (N.A.A.)
| | - Munazzah Tasleem
- School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China;
| | - Arshiya Akeel
- Department of Botany, Aligarh Muslim University, Aligarh 202002, India
- Correspondence: (A.A.); (M.S.)
| | - Tahani M. Almeleebia
- Department of Clinical Pharmacy, College of Pharmacy, King Khalid University, P.O. Box 61413, Abha 62529, Saudi Arabia;
| | - Irfan Ahmad
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Khalid University, P.O. Box 61413, Abha 62529, Saudi Arabia; (M.Y.A.); (I.A.); (M.A.)
| | - Mohammed Asiri
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Khalid University, P.O. Box 61413, Abha 62529, Saudi Arabia; (M.Y.A.); (I.A.); (M.A.)
| | - Najla A. Alshahrani
- College of Medicine, King Khalid University Abha, P.O. Box 61413, Abha 62529, Saudi Arabia; (K.M.A.); (N.A.A.)
| | - Nadiyah M. Alabdallah
- Department of Biology, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia;
| | - Mohd Saeed
- Department of Biology, College of Sciences, University of Hail, P.O. Box 2440, Hail 55425, Saudi Arabia
- Correspondence: (A.A.); (M.S.)
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Zhang R, Liu Z, Zhang G. CDC45 modulates MCM7 expression and inhibits cell proliferation by suppressing the PI3K/AKT pathway in acute myeloid leukemia. Am J Transl Res 2021; 13:10218-10232. [PMID: 34650692 PMCID: PMC8507005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Accepted: 07/28/2021] [Indexed: 06/13/2023]
Abstract
Acute myeloid leukemia (AML) is a heterogenous hematologic disease that has a poor prognosis. This study aimed to identify new targets for the diagnosis and treatment of AML. The GSE65409 and GSE90062 were selected from the AML database of the Gene Expression Omnibus and compared using the GEO2R tool to identify differentially expressed genes (DEGs). The Database for Annotation, Visualization, and Integrated Discovery was used to perform gene ontology and Kyoto Encyclopedia of Genes and Genomes analyses of the DEGs. Protein-protein interactions were visualized using the Search Tool for the Retrieval of Interacting Genes, which identified two potential hub genes that encode CDC45 and MCM7. Relative to AML specimens, normal specimens had higher expression levels of CDC45 and MCM7 based on the Gene Expression Omnibus and The Cancer Genome Atlas databases. Furthermore, Pearson's correlation analysis revealed a significant relationship between CDC45 and MCM7. High expression of CDC45 was positively correlated with complete remission and negatively correlated with white blood cell count, hemoglobin concentration, platelet count, and bone marrow blasts. Moreover, high expression of MCM7 was negatively correlated with white blood cell count, hemoglobin concentration, platelet count, bone marrow blasts, and unfavorable cytogenetics. Overexpression of CDC45 increased the expressions of CDC45 and MCM7, while overexpression of MCM7 increased the expression of MCM7 but not CDC45. Overexpression of CDC45 or MCM7 led to impaired AML cell proliferation and blockage at the G1/S phase transition. Overexpression of CDC45 or MCM7 also attenuated the phosphorylation of PI3K, AKT, and mTOR, while simultaneous down-regulation of MCM7 expression abolished the effects of CDC45 overexpression. These findings suggest a functional relationship between CDC45 and MCM7, which might have use in the diagnosis and treatment of AML.
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Affiliation(s)
- Rong Zhang
- Department of Hematology, Shenjing Hospital of China Medical University Shenyang, Liaoning Province, People's Republic of China
| | - Zhuogang Liu
- Department of Hematology, Shenjing Hospital of China Medical University Shenyang, Liaoning Province, People's Republic of China
| | - Guojun Zhang
- Department of Hematology, Shenjing Hospital of China Medical University Shenyang, Liaoning Province, People's Republic of China
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Zhao M, Wang Y, Jiang C, Wang Q, Mi J, Zhang Y, Zuo L, Geng Z, Song X, Ge S, Li J, Wen H, Wang J, Wang Z, Su F. miR-107 regulates the effect of MCM7 on the proliferation and apoptosis of colorectal cancer via the PAK2 pathway. Biochem Pharmacol 2021; 190:114610. [PMID: 34010598 DOI: 10.1016/j.bcp.2021.114610] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Revised: 05/11/2021] [Accepted: 05/14/2021] [Indexed: 12/01/2022]
Abstract
Microchromosome maintenance protein 7 (MCM7), a DNA replication permitting factor, plays an essential role in initiating DNA replication. MCM7 is reported to be involved in tumor formation and progression, whereas the expression profile and molecular function of MCM7 in colorectal cancer (CRC) remain unknown. In this study, we aimed to evaluate the clinical significance and biological function of MCM7 in CRC and investigated whether MCM7 can be used for a differential diagnosis in CRC and whether it may serve as a more sensitive proliferation marker for CRC evaluation. Moreover, immunohistochemical analysis of MCM7 was performed in a total of 89 specimens, and high MCM7 expression levels were associated with worse overall survival (OS) in CRC patients. Furthermore, the cell functional test suggested that lentivirus-mediated silencing of MCM7 with shRNA in CRC cells significantly inhibited cellular proliferation and promoted apoptosis in vitro and inhibited tumor growth in vivo. Additionally, mechanistic studies further demonstrated that P21-activated protein kinase 2 (PAK2) was regulated by MCM7 via microarray analysis and cell functional recovery tests, and miR-107 played a role in regulating expression MCM7 via miRNA microarray analysis and 3'UTR reporter assays. Taken together, our results suggest that the miR-107/MCM7/PAK2 pathway may participate in cancer progression and that MCM7 may serve as a prognostic biomarker in CRC.
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Affiliation(s)
- Menglin Zhao
- Department of Medical Oncology, First Affiliated Hospital of Bengbu Medical College, Bengbu 233004, Anhui, PR China
| | - Yanyan Wang
- Department of Medical Oncology, First Affiliated Hospital of Bengbu Medical College, Bengbu 233004, Anhui, PR China
| | - Chenchen Jiang
- Cancer Neurobiology Group, School of Biomedical Sciences & Pharmacy, The University of Newcastle, Callaghan, NSW 2308, Australia; School of Medicine & Public Health, The University of Newcastle, Callaghan, NSW 2308, Australia
| | - Qiang Wang
- Department of Network Information Center, Bengbu Medical College, Bengbu 233004, Anhui, PR China
| | - Jiaqi Mi
- Department of Medical Oncology, First Affiliated Hospital of Bengbu Medical College, Bengbu 233004, Anhui, PR China
| | - Yue Zhang
- Department of Medical Oncology, First Affiliated Hospital of Bengbu Medical College, Bengbu 233004, Anhui, PR China
| | - Lugen Zuo
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Bengbu Medical College, Bengbu 233004, Anhui, PR China
| | - Zhijun Geng
- Department of Central Laboratory, First Affiliated Hospital of Bengbu Medical College, Bengbu 233004, Anhui, PR China
| | - Xue Song
- Department of Central Laboratory, First Affiliated Hospital of Bengbu Medical College, Bengbu 233004, Anhui, PR China
| | - Sitang Ge
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Bengbu Medical College, Bengbu 233004, Anhui, PR China
| | - Jing Li
- Department of Clinical Laboratory, First Affiliated Hospital of Bengbu Medical College, Bengbu 233004, Anhui, PR China
| | - Hexin Wen
- Department of Gastrointestinal Surgery, First Affiliated Hospital of Bengbu Medical College, Bengbu 233004, Anhui, PR China
| | - Juan Wang
- Department of Medical Oncology, First Affiliated Hospital of Bengbu Medical College, Bengbu 233004, Anhui, PR China
| | - Zishu Wang
- Department of Medical Oncology, First Affiliated Hospital of Bengbu Medical College, Bengbu 233004, Anhui, PR China.
| | - Fang Su
- Department of Medical Oncology, First Affiliated Hospital of Bengbu Medical College, Bengbu 233004, Anhui, PR China.
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Ahammad F, Alam R, Mahmud R, Akhter S, Talukder EK, Tonmoy AM, Fahim S, Al-Ghamdi K, Samad A, Qadri I. Pharmacoinformatics and molecular dynamics simulation-based phytochemical screening of neem plant (Azadiractha indica) against human cancer by targeting MCM7 protein. Brief Bioinform 2021; 22:6217720. [PMID: 33834183 DOI: 10.1093/bib/bbab098] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 03/02/2021] [Accepted: 03/04/2021] [Indexed: 12/20/2022] Open
Abstract
Minichromosome maintenance complex component 7 (MCM7) belongs to the minichromosome maintenance family that is important for the initiation of eukaryotic DNA replication. Overexpression of the MCM7 protein is relative to cellular proliferation and responsible for aggressive malignancy in various cancers. Mechanistically, inhibition of MCM7 significantly reduces the cellular proliferation associated with cancer. To date, no effective small molecular candidate has been identified that can block the progression of cancer induced by the MCM7 protein. Therefore, the study has been designed to identify small molecular-like natural drug candidates against aggressive malignancy associated with various cancers by targeting MCM7 protein. To identify potential compounds against the targeted protein a comprehensive in silico drug design including molecular docking, ADME (Absorption, Distribution, Metabolism and Excretion), toxicity, and molecular dynamics (MD) simulation approaches has been applied. Seventy phytochemicals isolated from the neem tree (Azadiractha indica) were retrieved and screened against MCM7 protein by using the molecular docking simulation method, where the top four compounds have been chosen for further evaluation based on their binding affinities. Analysis of ADME and toxicity properties reveals the efficacy and safety of the selected four compounds. To validate the stability of the protein-ligand complex structure MD simulations approach has also been performed to the protein-ligand complex structure, which confirmed the stability of the selected three compounds including CAS ID:105377-74-0, CID:12308716 and CID:10505484 to the binding site of the protein. In the study, a comprehensive data screening process has performed based on the docking, ADMET properties, and MD simulation approaches, which found a good value of the selected four compounds against the targeted MCM7 protein and indicates as a promising and effective human anticancer agent.
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Affiliation(s)
- Foysal Ahammad
- Department of Biological Science, Faculty of science, King Abdul-Aziz University, Jeddah-21589, Saudi Arabia.,Laboratory of Computational Biology, Biological Solution Centre (BioSol Centre), Jashore-7408, Bangladesh.,Department of Genetic Engineering and Biotechnology, Faculty of Biological Science and Technology, Jashore University and Science and Technology University, Jashore-7408, Bangladesh
| | - Rahat Alam
- Laboratory of Computational Biology, Biological Solution Centre (BioSol Centre), Jashore-7408, Bangladesh.,Department of Genetic Engineering and Biotechnology, Faculty of Biological Science and Technology, Jashore University and Science and Technology University, Jashore-7408, Bangladesh
| | - Rasel Mahmud
- Department of Pharmacy, Mawlana Bhashani Science and Technology University, Tangail-1902, Bangladesh
| | - Shahina Akhter
- Laboratory of Computational Biology, Biological Solution Centre (BioSol Centre), Jashore-7408, Bangladesh.,Department of Biochemistry and Biotechnology, University of Science and Technology Chittagong (USTC) Block # D, Floor # 11, Foy's Lake, Khulshi, Chittagong 4202, Bangladesh
| | - Enamul Kabir Talukder
- Laboratory of Computational Biology, Biological Solution Centre (BioSol Centre), Jashore-7408, Bangladesh.,Department of Genetic Engineering and Biotechnology, Faculty of Biological Science and Technology, Jashore University and Science and Technology University, Jashore-7408, Bangladesh
| | - Al Mahmud Tonmoy
- Laboratory of Computational Biology, Biological Solution Centre (BioSol Centre), Jashore-7408, Bangladesh.,Department of Zoology, Institute of Dhaka College, University of Dhaka, Dhaka-1000, Bangladesh
| | - Salman Fahim
- Laboratory of Computational Biology, Biological Solution Centre (BioSol Centre), Jashore-7408, Bangladesh.,Bachelor of medicine and Bachelor of Surgery (MBBS), CARe Medical College, 2, 1-A Iqbal Road, Dhaka-1207, Bangladesh
| | - Khalid Al-Ghamdi
- Department of Biological Science, Faculty of science, King Abdul-Aziz University, Jeddah-21589, Saudi Arabia
| | - Abdus Samad
- Laboratory of Computational Biology, Biological Solution Centre (BioSol Centre), Jashore-7408, Bangladesh.,Department of Genetic Engineering and Biotechnology, Faculty of Biological Science and Technology, Jashore University and Science and Technology University, Jashore-7408, Bangladesh
| | - Ishtiaq Qadri
- Department of Biological Science, Faculty of science, King Abdul-Aziz University, Jeddah-21589, Saudi Arabia
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11
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Misono S, Mizuno K, Suetsugu T, Tanigawa K, Nohata N, Uchida A, Sanada H, Okada R, Moriya S, Inoue H, Seki N. Molecular Signature of Small Cell Lung Cancer after Treatment Failure: The MCM Complex as Therapeutic Target. Cancers (Basel) 2021; 13:1187. [PMID: 33801812 DOI: 10.3390/cancers13061187] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 02/26/2021] [Accepted: 03/03/2021] [Indexed: 12/12/2022] Open
Abstract
Small cell lung cancer (SCLC) is a highly aggressive cancer, and patients who become refractory to first-line treatment have a poor prognosis. The development of effective treatment regimens is urgently needed. In this study, we identified a gene expression signature of SCLC after treatment failure using SCLC clinical specimens (GEO accession number: GSE162102). A total of 1,136 genes were significantly upregulated in SCLC tissues. These upregulated genes were subjected to KEGG pathway analysis, and "cell cycle", "Fanconi anemia", "alcoholism", "systemic lupus erythematosus", "oocyte meiosis", "homologous recombination", "DNA replication", and "p53 signaling" were identified as the enriched pathways among the genes. We focused on the cell cycle pathway and investigated the clinical significance of four genes associated with this pathway: minichromosome maintenance (MCM) 2, MCM4, MCM6, and MCM7. The overexpression of these MCM genes was confirmed in SCLC clinical specimens. Knockdown assays using siRNAs targeting each of these four MCM genes showed significant attenuation of cancer cell proliferation. Moreover, siRNA-mediated knockdown of each MCM gene enhanced the cisplatin sensitivity of SCLC cells. Our SCLC molecular signature based on SCLC clinical specimens after treatment failure will provide useful information to identify novel molecular targets for this disease.
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12
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Li X, Wang X, Zhao J, Wang J, Wu J. PRMT5 promotes colorectal cancer growth by interaction with MCM7. J Cell Mol Med 2021; 25:3537-3547. [PMID: 33675123 PMCID: PMC8034445 DOI: 10.1111/jcmm.16436] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 02/01/2021] [Accepted: 02/22/2021] [Indexed: 12/23/2022] Open
Abstract
Protein arginine methyltransferase 5 (PRMT5) is a type of methyltransferase enzyme that can catalyse arginine methylation of histones and non‐histone proteins. Accumulating evidence indicates that PRMT5 promotes cancer development and progression. However, its function in colorectal cancer (CRC) is poorly understood. In this study, we revealed the oncogenic roles of PRMT5 in CRC. We found that PRMT5 promoted CRC cell proliferation, migration and invasion in vitro and in vivo. We identified minichromosome maintenance‐7 (MCM7) as the direct PRMT5‐binding partner. A co‐immunoprecipitation (co‐IP) assay indicated that PRMT5 physically interacted with MCM7 and that the direct binding domain was located between residues 1‐248 in MCM7. In addition, our results from analysis of 99 CRC tissues and 77 adjacent non‐cancerous tissues indicated that the PRMT5 and MCM7 expression levels were significantly higher in CRC tissues than in control tissues, which was further confirmed by bioinformatic analysis using TCGA and GEO datasets. We also found that MCM7 promoted CRC cell proliferation, migration and invasion in vitro. Furthermore, we observed that increased PRMT5 expression predicted unfavourable patient survival in CRC patients and in the subgroup of patients with a tumour size of ≤5 cm. These data suggested that PRMT5 and MCM7 might be novel potential targets for the treatment of CRC.
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Affiliation(s)
- Xiangwei Li
- Department of Pathology & Pathophysiology, and Department of Colorectal Surgery of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Department of Pathology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xin Wang
- Department of Pathology & Pathophysiology, and Department of Colorectal Surgery of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jiahui Zhao
- Department of Pathology & Pathophysiology, and Department of Colorectal Surgery of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jian Wang
- Department of Colorectal Surgery and Oncology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jingjing Wu
- Department of Pathology & Pathophysiology, and Department of Colorectal Surgery of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
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13
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Yang L, Wang X, Jiao X, Tian B, Zhang M, Zhou C, Wang R, Chen H, Wang B, Li J, Liu J, Zhang G, Liu P. Suppressor of Ty 16 promotes lung cancer malignancy and is negatively regulated by miR-1227-5p. Cancer Sci 2020; 111:4075-4087. [PMID: 32860308 PMCID: PMC7648015 DOI: 10.1111/cas.14627] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 07/03/2020] [Accepted: 07/27/2020] [Indexed: 01/01/2023] Open
Abstract
Suppressor of Ty 16 (Spt16) is a component of the facilitates chromatin transcription (FACT) complex, which is a histone chaperone and involved in gene transcription, DNA replication, and DNA repair. Previous studies showed that FACT is highly expressed in cancer, and cancer cells are more reliant on FACT than normal cells. However, the relationship between Spt16 and lung cancer remains unclear. In this study, we explored the functions of Spt16 in lung cancer cells. The effects of Spt16 on lung cancer cell proliferation, cell cycle progression, apoptosis, migration, and invasion were examined. We found that knockdown of Spt16 led to obvious decreases of both Rb and MCM7, and further activated the DNA damage response (DDR) pathway. In addition, a novel micro‐RNA, miR‐1227‐5p, directly targeted the 3′‐UTR of Spt16 and regulated the mRNA levels of Spt16. Furthermore, we found that CBL0137, the functional inhibitor of FACT, showed similar effects as loss of Spt16. Together, our data indicated that Spt16 is likely to be an essential regulator for lung cancer malignancy and is negatively regulated by miR‐1227‐5p.
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Affiliation(s)
- Lu Yang
- Center for Translational Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.,Key Laboratory for Tumor Precision Medicine of Shaanxi Province, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Xing Wang
- Department of Pathology, First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Xinyan Jiao
- Center for Translational Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.,Key Laboratory for Tumor Precision Medicine of Shaanxi Province, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Bixia Tian
- Center for Translational Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.,Key Laboratory for Tumor Precision Medicine of Shaanxi Province, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Miao Zhang
- Center for Translational Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.,Key Laboratory for Tumor Precision Medicine of Shaanxi Province, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Can Zhou
- Department of Breast Surgery, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Ruiqi Wang
- Center for Translational Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.,Key Laboratory for Tumor Precision Medicine of Shaanxi Province, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - He Chen
- Center for Translational Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.,Key Laboratory for Tumor Precision Medicine of Shaanxi Province, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Bo Wang
- Center for Translational Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.,Key Laboratory for Tumor Precision Medicine of Shaanxi Province, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Juan Li
- Center for Translational Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.,Key Laboratory for Tumor Precision Medicine of Shaanxi Province, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Jie Liu
- Center for Translational Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.,Key Laboratory for Tumor Precision Medicine of Shaanxi Province, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Guanjun Zhang
- Department of Pathology, First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Peijun Liu
- Center for Translational Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.,Key Laboratory for Tumor Precision Medicine of Shaanxi Province, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
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14
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Tripon F, Iancu M, Trifa A, Crauciuc GA, Boglis A, Dima D, Lazar E, Bănescu C. Modelling the Effects of MCM7 Variants, Somatic Mutations, and Clinical Features on Acute Myeloid Leukemia Susceptibility and Prognosis. J Clin Med 2020; 9:E158. [PMID: 31936215 DOI: 10.3390/jcm9010158] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 12/21/2019] [Accepted: 01/06/2020] [Indexed: 12/13/2022] Open
Abstract
The main objective of the study was to evaluate the associations between MCM7 rs2070215, rs1527423, and rs1534309 single nucleotide polymorphisms (SNPs) and acute myeloid leukemia (AML) risk and prognosis. The secondary objectives were to assess if any relationships existed between the mentioned SNPs and FLT3, DNMT3A, NPM1 mutations with clinical outcomes and overall survival (OS) in AML patients. We investigated 281 AML cases and 405 healthy subjects. The results showed a significant association between a variant allele of rs2070215 (p = 0.007), CAT haplotype (p = 0.012), and AML susceptibility. No significant association was found between MCM7 variant genotypes and overall survival of AML patients (p > 0.05), while several associations between somatic mutations, clinical and biological features, and poor OS were noticed. Lactate dehydrogenase (LDH) level ≥ 600 IU/L had a significant effect on the hazard of death (p = 0.004, HR = 1.49, 95% CI: 1.13–1.95). Our study showed that the variant allele of rs2070215, in the allelic model, and CAT haplotype were associated with AML susceptibility. The investigated FLT3, DNMT3A, and NPM1 mutations were associated with the clinical and biological features and poor OS. LDH level ≥ 600 IU/L was associated with an increased hazard of death and this association remained significant when quantifying for effect modification by FLT3 mutation status.
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15
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Jia M, Zheng D, Wang X, Zhang Y, Chen S, Cai X, Mo L, Hu Z, Li H, Zhou Z, Li J. Cancer Cell enters reversible quiescence through Intracellular Acidification to resist Paclitaxel Cytotoxicity. Int J Med Sci 2020; 17:1652-1664. [PMID: 32669967 PMCID: PMC7359388 DOI: 10.7150/ijms.46034] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Accepted: 06/12/2020] [Indexed: 12/16/2022] Open
Abstract
Cancer cells can enter quiescent or dormant state to resist anticancer agents while maintaining the potential of reactivation. However, the molecular mechanism underlying quiescence entry and reactivation remains largely unknown. In this paper, cancer cells eventually entered a reversible quiescent state to resist long-term paclitaxel (PTX) stress. The quiescent cells were characterized with Na+/H+ exchanger 1 (NHE1) downregulation and showed acidic intracellular pH (pHi). Accordingly, decreasing pHi by NHE1 inhibitor could induce cell enter quiescence. Further, acidic pHi could activate the ubiquitin-proteasome system and inhibiting proteasome activity by MG132 prevented cells entering quiescence. In addition, we show that after partial release, the key G1-S transcription factor E2F1 protein level was not recovered, while MCM7 protein returned to normal level in the reactivated cells. More importantly, MCM7 knockdown inhibited G1/S genes transcription and inhibited the reactivated proliferation. Taken together, this study demonstrates a regulatory function of intracellular acidification and subsequent protein ubiquitination on quiescence entry, and reveals a supportive effect of MCM7 on the quiescence-reactivated proliferation.
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Affiliation(s)
- Min Jia
- Institute of Biotherapy, School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, Guangdong, China
| | - Dianpeng Zheng
- Institute of Biotherapy, School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, Guangdong, China
| | - Xiuyun Wang
- Institute of Biotherapy, School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, Guangdong, China
| | - Yongjun Zhang
- Institute of Biotherapy, School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, Guangdong, China
| | - Sansan Chen
- Department of Urology, The First Affiliated Hospital, Guangdong Pharmaceutical University, Guangzhou, Guangdong, China
| | - Xiangsheng Cai
- Clinical Laboratory, The First Affiliated Hospital, Guangdong Pharmaceutical University, Guangzhou, Guangdong, China
| | - Lijun Mo
- Institute of Biotherapy, School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, Guangdong, China
| | - Zhiming Hu
- Institute of Biotherapy, School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, Guangdong, China
| | - Hongwei Li
- Institute of Biotherapy, School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, Guangdong, China
| | - Zhongxin Zhou
- Department of Vascular Surgery, The Third Affiliated Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Jinlong Li
- Institute of Biotherapy, School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, Guangdong, China
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16
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Szelachowska J, Donizy P, Ratajczak-Wielgomas K, Halon A, Zielecka-Debska D, Lichon K, Maciejczyk A, Lata-Wozniak E, Piotrowska A, Matkowski R. The effect of YAP expression in tumor cells and tumor stroma on the prognosis of patients with squamous cell carcinoma of the oral cavity floor and oral surface of the tongue. Oncol Lett 2019; 18:3561-3570. [PMID: 31579068 PMCID: PMC6757271 DOI: 10.3892/ol.2019.10695] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 07/04/2019] [Indexed: 12/26/2022] Open
Abstract
Classic prognostic factors, such as clinical advancement of the disease and histological grade of the tumor, continue to have a decisive role in the selection of therapeutic strategy in patients with carcinoma of the oral cavity floor and oral surface of the tongue (OCC). YAP1/Yes-associated protein 1 (YAP) and transcriptional co-activator with PDZ-binding motif, WWTR1 (TAZ) proteins, appear to be promising markers that may be used to develop personalized therapies. The aim of the present study was to analyze the associations between the levels of YAP, TAZ and tyrosine-protein phosphatase non-receptor type 14 (PTPN14) and to determine whether the increased expression of YAP and TAZ had an effect on tumor cell proliferation, as determined by minichromosome maintenance 7, DNA replication licensing factor 7 expression. Their prognostic value was also assessed. In total, 127 patients who underwent radical surgery and were subjected to adjuvant radiation therapy due to squamous cell OCC were enrolled in the present study. The results demonstrated an evident effect as YAP expression increased in cancer-associated fibroblasts, which induced unfavorable prognosis in patients. In addition, a positive association between proliferation in cancer cells and YAP expression in stromal cells was observed. A lack of YAP expression in the cytoplasm of tumor cells was a factor for poor prognosis with regard to disease-free survival and disease specific survival. No statistically significant correlations between YAP and TAZ expression and PTPN14 expression were identified, nor was a correlation between cell proliferation and the presence of YAP and TAZ in tumor cells observed. The results indicated that YAP expression levels may support the development of personalized therapies for patients.
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Affiliation(s)
- Jolanta Szelachowska
- Department of Oncology, Gynaecological Oncology Clinic, Wroclaw Medical University, 53-413 Wroclaw, Poland.,Department of Radiotherapy, Lower Silesian Oncology Centre, 53-413 Wroclaw, Poland
| | - Piotr Donizy
- Department of Pathomorphology and Oncological Cytology, Wroclaw Medical University, 50-556 Wroclaw, Poland
| | | | - Agnieszka Halon
- Department of Pathomorphology and Oncological Cytology, Wroclaw Medical University, 50-556 Wroclaw, Poland
| | - Dominika Zielecka-Debska
- Department of Radiotherapy, Lower Silesian Oncology Centre, 53-413 Wroclaw, Poland.,Department of Oncology, Clinic of Surgical Oncology, Wroclaw Medical University, 53-413 Wroclaw, Poland
| | - Krystian Lichon
- Department of Oncology, Gynaecological Oncology Clinic, Wroclaw Medical University, 53-413 Wroclaw, Poland.,Department of Radiotherapy, Lower Silesian Oncology Centre, 53-413 Wroclaw, Poland
| | - Adam Maciejczyk
- Department of Radiotherapy, Lower Silesian Oncology Centre, 53-413 Wroclaw, Poland.,Department of Oncology, Clinic of Radiation Oncology, Wroclaw Medical University, 53-413 Wroclaw, Poland
| | - Ewelina Lata-Wozniak
- Department of Oncology, Gynaecological Oncology Clinic, Wroclaw Medical University, 53-413 Wroclaw, Poland.,Department of Radiotherapy, Lower Silesian Oncology Centre, 53-413 Wroclaw, Poland
| | - Aleksandra Piotrowska
- Histology and Embryology Division, Wroclaw Medical University, 50-368 Wroclaw, Poland
| | - Rafal Matkowski
- Department of Radiotherapy, Lower Silesian Oncology Centre, 53-413 Wroclaw, Poland.,Department of Oncology, Clinic of Surgical Oncology, Wroclaw Medical University, 53-413 Wroclaw, Poland
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17
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Zalar P, Zupančič J, Gostinčar C, Zajc J, de Hoog GS, De Leo F, Azua-Bustos A, Gunde-Cimerman N. The extremely halotolerant black yeast Hortaea werneckii - a model for intraspecific hybridization in clonal fungi. IMA Fungus 2019; 10:10. [PMID: 32647617 PMCID: PMC7325687 DOI: 10.1186/s43008-019-0007-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 04/03/2019] [Indexed: 12/22/2022] Open
Abstract
The polymorphic black yeast Hortaea werneckii (Capnodiales, Ascomycota) is extremely halotolerant (growth from 0 to 30% [w/v] NaCl) and has been extensively studied as a model for halotolerance in Eukaryotes for over two decades. Its most frequent sources are hypersaline environments and adjacent sea-water habitats in temperate, subtropical and tropical climates. Although typically saprobic, H. werneckii can also act as a commensal coloniser on human skin, causing tinea nigra on hands and soles. Here, we report that addition of NaCl to culture media expands the growth range of H. werneckii to 37 °C, which explains its colonisation of human skin, with its increased salinity. The morphological and physiological plasticity/ versatility of H. werneckii indicate that a species complex might be involved. This was investigated in this polyphasic taxonomic analysis based on the global diversity of H. werneckii strains collected from hypersaline environments, and from humans and animals. Analysis of D1/D2domains of 28S and internal transcribed spacer rDNA revealed 10 and 17 genotypes, respectively, that were not always compliant. The genotypes have global distributions. Human and environmental strains with the same genotypes are intermingled. Due to the limited number of phylogenetically informative characters in the ribosomal DNA dataset, the partial genes encoding for β-tubulin (BTB) and mini-chromosome maintenance protein (MCM7) were also sequenced. The use of these genes was hampered by ambiguous sequences obtained by Sanger sequencing, as a consequence of the diploid and highly heterozygous genome of many H. werneckii strains. Analysis of the BTB and MCM7 genes showed that in some cases two copies of the gene from the same genome are positioned in distant phylogenetic clusters of the intraspecific gene tree. Analysis of whole-genome sequences of selected H. werneckii strains generally confirmed the phylogenetic distances estimated on the basis of ribosomal genes, but also showed substantial reticulation within the phylogenetic history of the strains. This is in line with the hypothesis that the diploid genomes of H. werneckii were formed by hybridizations, which have sometimes occurred between relatively divergent strains.
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Affiliation(s)
- Polona Zalar
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, SI-1000 Ljubljana, Slovenia
| | - Jerneja Zupančič
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, SI-1000 Ljubljana, Slovenia
| | - Cene Gostinčar
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, SI-1000 Ljubljana, Slovenia
- Lars Bolund Institute of Regenerative Medicine, BGI-Qingdao, Qingdao, 266555 China
| | - Janja Zajc
- Department of Biotechnology and Systems Biology, National Institute of Biology, Večna pot 111, 1000 Ljubljana, Slovenia
| | - G. Sybren de Hoog
- Westerdijk Fungal Biodiversity Institute, P.O. Box 85167, Utrecht, 3508 AD The Netherlands
- Centre of Expertise in Mycology of RadboudUMC, Canisius Wilhelmina Hospital, Nijmegen, The Netherlands
| | - Filomena De Leo
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences (ChiBioFarAm), University of Messina, Viale F. Stagno d’Alcontres, 31 98166 Messina, Italy
| | - Armando Azua-Bustos
- Centro de Astrobiología (CSIC-INTA), Madrid, Spain
- Instituto de Ciencias Biomédicas, Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, 8910060 Santiago, Chile
| | - Nina Gunde-Cimerman
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, SI-1000 Ljubljana, Slovenia
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18
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Zhang Y, Xu L, Wang P, Jian H, Shi X, Jia M, Mo L, Hu Z, Li H, Li J. Phenotypic transition of tumor cells between epithelial- and mesenchymal-like state during adaptation to acidosis. Cell Cycle 2019; 18:1938-1947. [PMID: 31234753 DOI: 10.1080/15384101.2019.1635868] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Acidic microenvironment is an important feature of solid tumors that contributes to malignant transformation. Low extracellular pH could promote epithelial-mesenchymal transition (EMT) thereby endowing tumor cells with higher invasive capability. However, the relation between EMT and tumor cell proliferation under long-term acidic condition is still not fully understood. Here, we show that tumor cells have undergone a phenotypic transition from EMT to mesenchymal-epithelial transition (MET) during adaptation to acidosis, and is closely related with cell proliferative state. Under early stage of acidic stress, tumor cells entered a non-cycling quiescent state with mesenchymal phenotype and expressed high level of stemness genes. Whereas, after long-term acid culture (2 months), acid-adapted cells resumed proliferating but lost mesenchymal phenotype. Further, our results show that the acid-adapted cells have distinct proliferative mechanism from non-acid cells, as the G1-S transcriptional factor E2F1 protein was not recovered in the adapted cells. Meanwhile, mini-chromosome maintenance 7 (MCM7) is shown to regulate the EMT to MET phenotypic transition, and is required for proliferation of the adapted cells under acidic condition. MCM7 Knockdown promoted mesenchymal phenotype and inhibited proliferation of the acid-adapted cells. While, MCM7 overexpression inhibited acid-induced EMT and supported tumor cell proliferation under acidic condition. Thus, our study provides evidence that tumor cells display phenotypic plasticity that allows them to survive acid stress.
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Affiliation(s)
- Yongjun Zhang
- a Institute of Biotherapy, School of Laboratory Medicine and Biotechnology, Southern Medical University , Guangzhou , Guangdong , China
| | - Lili Xu
- a Institute of Biotherapy, School of Laboratory Medicine and Biotechnology, Southern Medical University , Guangzhou , Guangdong , China
| | - Ping Wang
- a Institute of Biotherapy, School of Laboratory Medicine and Biotechnology, Southern Medical University , Guangzhou , Guangdong , China
| | - Huanzhang Jian
- a Institute of Biotherapy, School of Laboratory Medicine and Biotechnology, Southern Medical University , Guangzhou , Guangdong , China
| | - Xianghua Shi
- b Department of Urology, Nanfang Hospital, Southern Medical University , Guangzhou , Guangdong , China
| | - Min Jia
- a Institute of Biotherapy, School of Laboratory Medicine and Biotechnology, Southern Medical University , Guangzhou , Guangdong , China
| | - Lijun Mo
- a Institute of Biotherapy, School of Laboratory Medicine and Biotechnology, Southern Medical University , Guangzhou , Guangdong , China
| | - Zhiming Hu
- a Institute of Biotherapy, School of Laboratory Medicine and Biotechnology, Southern Medical University , Guangzhou , Guangdong , China
| | - Hongwei Li
- a Institute of Biotherapy, School of Laboratory Medicine and Biotechnology, Southern Medical University , Guangzhou , Guangdong , China
| | - Jinlong Li
- a Institute of Biotherapy, School of Laboratory Medicine and Biotechnology, Southern Medical University , Guangzhou , Guangdong , China
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19
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Zhu F, Qian X, Wang Z. Molecular characterization of minichromosome maintenance protein ( MCM7) in Scylla paramamosain and its role in white spot syndrome virus and Vibrio alginolyticus infection. Fish Shellfish Immunol 2018; 83:104-114. [PMID: 30205202 DOI: 10.1016/j.fsi.2018.09.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 09/03/2018] [Accepted: 09/07/2018] [Indexed: 06/08/2023]
Abstract
The minichromosome maintenance protein (MCM7) is a member of the MCM protein family which participates in the MCM complex by playing a role in the cell replication cycle and chromosome initiation in eukaryotes. The 2270 bp cDNA sequence of MCM7, including a 2127-bp open reading frame (ORF) encoding a 709-aa protein, was cloned from Scylla paramamosain using RT-PCR and RACE. Data showed that MCM7 was highly expressed in the digestive organ and hepatopancreas of S. paramamosain. Furthermore, MCM7 expression was down-regulated by infection with white spot syndrome virus (WSSV) or Vibrio alginolyticus. When MCM7 was knocked down, immune genes such as Janus kinase (JAK) and crustin antimicrobial peptide (CAP) were down-regulated, and C-type-lectin (CTL) was up-regulated in hemocytes. The mortality of WSSV-infected or V. alginolyticus-infected crabs was enhanced following MCM7 knockdown. It was demonstrated that MCM7 is very important in the progression of WSSV and V. alginolyticus infection. We also investigated the effect of MCM7 on apoptosis rate and phagocytic rate in S. paramamosain. MCM7 knockdown caused higher levels of apoptosis in the hemocytes of the control, WSSV, and V. alginolyticus groups. MCM7 knockdown influenced the activity of phenoloxidase (PO) and superoxide dismutase (SOD), and total hemocyte count (THC) after infection with WSSV or V. alginolyticus, which indicated that MCM7 plays a regulatory role in innate immunity of crabs. Thus, we conclude that MCM7 may participate in the anti-WSSV and V. alginolyticus immune response in crabs by regulating apoptosis and the activity of PO and SOD.
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Affiliation(s)
- Fei Zhu
- College of Animal Science and Technology, Zhejiang Agriculture and Forestry University, Hangzhou, 311300, China.
| | - Xiyi Qian
- College of Animal Science and Technology, Zhejiang Agriculture and Forestry University, Hangzhou, 311300, China
| | - Ziyan Wang
- College of Animal Science and Technology, Zhejiang Agriculture and Forestry University, Hangzhou, 311300, China
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20
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Wen QL, Zhu SM, Jiang LH, Xiang FY, Yin WJ, Qian YY, Huang YQ, Yin KX, Zhu X, Ge MH. Expression and prognostic significance of MCM-3 and MCM-7 in salivary adenoid cystic carcinoma. Int J Clin Exp Pathol 2018; 11:5359-5369. [PMID: 31949617 PMCID: PMC6963010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Accepted: 10/25/2018] [Indexed: 06/10/2023]
Abstract
This study sought to investigate minichromosome maintenance protein 3 (MCM3) and minichromosome maintenance protein 7 (MCM7) expression in salivary adenoid cystic carcinoma (SACC) samples, and to evaluate the relationship between clinicopathological characteristics and prognosis. The expressions of MCM3 and MCM7 were evaluated using immunohistochemistry of tissue sections from SACC patients, and statistical analyses were performed to evaluate the associations between MCM expression and clinicopathological variables and to analyze the disease-free survival (DFS) and prognostic factors. The positive expression rates of MCM3 and MCM7 in SACC were 98.8% and 96.6%, respectively. MCM3 expression correlated with T-stage and nerve invasion. MCM7 expression correlated with T-stage, adjacent tissue invasion, nerve invasion, and prognosis, and was negatively associated with DFS. However, there was no significant correlation between MCM3 expression and DFS. A kappa analysis demonstrated that MCM3 was closely associated with MCM7. MCM7 may be a favorable prognosis indicator in SACC.
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Affiliation(s)
- Qing-Liang Wen
- The First Affiliated Hospital of Wenzhou Medical UniversityOuhai District, Wenzhou, China
- Department of Thyroid and Breast Surgery, Zhejiang Provincial People’s HospitalGongshu District, Hangzhou, China
- Department of Head and Neck Surgery, Zhejiang Cancer HospitalGongshu District, Hangzhou, China
| | - Sen-Miao Zhu
- The Second Affiliated Hospital of Wenzhou Medical UniversityLucheng District, Wenzhou, China
| | - Lie-Hao Jiang
- Department of Thyroid and Breast Surgery, Zhejiang Provincial People’s HospitalGongshu District, Hangzhou, China
- Department of Head and Neck Surgery, Zhejiang Cancer HospitalGongshu District, Hangzhou, China
| | - Fang-Yue Xiang
- Stomatology College, Zhejiang Chinese Medical UniversityBinjiang District, Hangzhou, China
| | - Wen-Juan Yin
- Department of Pathology, Zhejiang Cancer HospitalGongshu District, Hangzhou, China
| | - Yang-Yang Qian
- The First Affiliated Hospital of Wenzhou Medical UniversityOuhai District, Wenzhou, China
- Department of Thyroid and Breast Surgery, Zhejiang Provincial People’s HospitalGongshu District, Hangzhou, China
- Department of Head and Neck Surgery, Zhejiang Cancer HospitalGongshu District, Hangzhou, China
| | - Yu-Qing Huang
- Department of Head and Neck Surgery, Zhejiang Cancer HospitalGongshu District, Hangzhou, China
- Second Clinical Medical College, Zhejiang Chinese Medical UniversityBinjiang District, Hangzhou, China
| | - Ke-Xin Yin
- Second Clinical Medical College, Zhejiang Chinese Medical UniversityBinjiang District, Hangzhou, China
| | - Xin Zhu
- Zhejiang Cancer Research Institute, Zhejiang Province Cancer HospitalGongshu District, Hangzhou, China
| | - Ming-Hua Ge
- The First Affiliated Hospital of Wenzhou Medical UniversityOuhai District, Wenzhou, China
- Department of Thyroid and Breast Surgery, Zhejiang Provincial People’s HospitalGongshu District, Hangzhou, China
- Department of Head and Neck Surgery, Zhejiang Cancer HospitalGongshu District, Hangzhou, China
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21
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Fei L, Ma Y, Zhang M, Liu X, Luo Y, Wang C, Zhang H, Zhang W, Han Y. RACK1 promotes lung cancer cell growth via an MCM7/RACK1/ Akt signaling complex. Oncotarget 2018; 8:40501-40513. [PMID: 28465488 PMCID: PMC5522230 DOI: 10.18632/oncotarget.17120] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 04/03/2017] [Indexed: 12/17/2022] Open
Abstract
MCM7, a member of the miniature chromosome maintenance (MCM) protein family, is crucial for the initiation of DNA replication and proliferation in eukaryotic cells. In this report, we demonstrate that RACK1 regulates cell growth and cell cycle progression in human non-small-cell lung cancer by mediating MCM7 phosphorylation through an MCM7/RACK1/Akt signaling complex. RACK1 functions as a central scaffold that brings Akt into physical proximity with MCM7. Overexpression of RACK1 increases interactions between Akt and MCM7 and promotes Akt-dependent MCM7 phosphorylation, which in turn increases MCM7 binding to chromatin and MCM complex formation. Together, these changes promote DNA replication and cell proliferation. Our findings reveal a novel signaling pathway that regulates growth in non-small cell lung cancer.
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Affiliation(s)
- Liangru Fei
- Department of Pathology, School of Basic Medical Sciences, China Medical University, Shenyang 110000, China
| | - Yinan Ma
- Department of Pathology, School of Basic Medical Sciences, China Medical University, Shenyang 110000, China
| | - Meiyu Zhang
- Department of Pathology, School of Basic Medical Sciences, China Medical University, Shenyang 110000, China
| | - Xiaofang Liu
- Department of Pathology, The First Affiliated Hospital of China Medical University, Shenyang 110000, China
| | - Yuan Luo
- Department of Pathology, School of Basic Medical Sciences, China Medical University, Shenyang 110000, China
| | - Congcong Wang
- Department of Pathology, The First Affiliated Hospital of China Medical University, Shenyang 110000, China
| | - Haiyan Zhang
- Department of Pathology, The First People's Hospital of Jining, Shandong 272000, China
| | - Wenzhu Zhang
- Department of Pathology, School of Basic Medical Sciences, China Medical University, Shenyang 110000, China
| | - Yuchen Han
- Department of Pathology, School of Basic Medical Sciences, China Medical University, Shenyang 110000, China.,Department of Pathology, The First Affiliated Hospital of China Medical University, Shenyang 110000, China
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22
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Wang H, Zhou C, Su B, Teng G, Zheng Y, Zhou X, Guo L, Xu F, Wang X. MCM7 expression is correlated with histological subtypes of lung adenocarcinoma and predictive of poor prognosis. Int J Clin Exp Pathol 2017; 10:11747-11753. [PMID: 31966536 PMCID: PMC6966067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 11/28/2017] [Indexed: 06/10/2023]
Abstract
Emerging evidence has implicated that the abnormal expression of MCM3 and MCM7 contributes to tumor formation and progression. However, MCM3 and MCM7 protein expression in different subtypes of lung adenocarcinoma have not yet been reported. In the present study, we detected MCM7 and MCM3 protein level in five subtypes of lung adenocarcinoma by immunohistochemistry. The five subtypes can be divided into 3 grades-grade 1: lepidic adenocarcinoma, grade 2: acinar or papillary adenocarcinoma and grade 3: solid or micropapillary adenocarcinoma. The immunostaining showed that MCM7 level was lowest in the grade 1 subtype and highest in the grade 3 subtypes. The statistical analysis proved that MCM7 expression increased step wisely with the ascending of tumor grades. However, there is no significant relationship between MCM3 expression and tumor grades. In addition, we investigated the association of MCM7 and MCM3 expression with clinicopathological characteristics. The results showed that tumors with lymph node metastasis had higher MCM7 level than those without lymph node metastasis statistically (P<0.0001). MCM3 expression has no significant relationship with clinicopathological characteristics. In conclusion, our results suggested that MCM7 may be a useful biomarker for the pathological diagnosis of subtypes of lung adenocarcinoma and it also may be a potential prognostic marker for lung adenocarcinoma.
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Affiliation(s)
- Haitao Wang
- Department of Pathology, The Second Hospital of Shandong UniversityJinan, Shandong, P.R. China
| | - Chengjun Zhou
- Department of Pathology, The Second Hospital of Shandong UniversityJinan, Shandong, P.R. China
| | - Baifang Su
- Zhangqiu Chinese Traditional Medicine Hospital of JinanZhangqiu, Shandong, P.R. China
| | - Guoxin Teng
- Department of Pathology, The Second Hospital of Shandong UniversityJinan, Shandong, P.R. China
| | - Yuping Zheng
- Department of Pathology, The Second Hospital of Shandong UniversityJinan, Shandong, P.R. China
| | - Xingchen Zhou
- Department of Pathology, The Second Hospital of Shandong UniversityJinan, Shandong, P.R. China
| | - Lin Guo
- Department of Pathology, The Second Hospital of Shandong UniversityJinan, Shandong, P.R. China
| | - Fenglei Xu
- Department of Otorhinolaryngology, The Second Hospital of Shandong UniversityJinan, Shandong, P.R. China
| | - Xiaoying Wang
- Department of Pathology, The Second Hospital of Shandong UniversityJinan, Shandong, P.R. China
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23
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Ma Y, Fei L, Zhang M, Zhang W, Liu X, Wang C, Luo Y, Zhang H, Han Y. Lamin B2 binding to minichromosome maintenance complex component 7 promotes non-small cell lung carcinogenesis. Oncotarget 2017; 8:104813-104830. [PMID: 29285216 PMCID: PMC5739603 DOI: 10.18632/oncotarget.20338] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Accepted: 07/17/2017] [Indexed: 12/13/2022] Open
Abstract
We investigated the role of lamin B2 in non-small cell lung cancer (NSCLC). We detected higher lamin B2 expression in 20 NSCLC tumor tissues obtained from The Cancer Genome Atlas than in adjacent normal lung tissues. LMNB2-RNAi knockdown in A549 and H1299 NSCLC cells inhibited colony formation, cell proliferation and G1-S cell cycle progression while increasing apoptosis. LMNB2 overexpression had the opposite effects. Tumor xenograft experiments showed diminished tumor growth with LMNB2 knockdown H1299 cells than with controls. Yeast two-hybrid studies revealed minichromosome maintenance complex component 7 (MCM7) to be a binding partner of lamin B2, which was confirmed by co-immunoprecipitation and co-localization studies. Lamin B2 binding enhanced DNA binding and helicase activities of MCM7. Deletion analysis with MCM7-N, MCM7-M or MCM7-C mutant proteins showed that lamin B2 binds to the C-terminus of MCM7, and competes with the binding of the tumor suppressor retinoblastoma (RB) protein. Immunohistochemical analysis of 150 NSCLC patient samples revealed that both lamin B2 and MCM7 levels positively correlated with histological grade and tumor TNM stage. Moreover, high lamin B2 and MCM7 levels correlated with shorter overall survival of NSCLC patients. In sum, these results show that lamin B2 interaction with MCM7 promotes NSCLC progression.
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Affiliation(s)
- Yinan Ma
- Departments of Pathology, School of Basic Medical Sciences, China Medical University, Liaoning, China
| | - Liangru Fei
- Departments of Pathology, School of Basic Medical Sciences, China Medical University, Liaoning, China
| | - Meiyu Zhang
- Departments of Pathology, School of Basic Medical Sciences, China Medical University, Liaoning, China
| | - Wenzhu Zhang
- Departments of Pathology, School of Basic Medical Sciences, China Medical University, Liaoning, China
| | - Xiaofang Liu
- Department of Pathology, The First Affiliated Hospital of China Medical University, Liaoning, China
| | - Congcong Wang
- Department of Pathology, The First Affiliated Hospital of China Medical University, Liaoning, China
| | - Yuan Luo
- Departments of Pathology, School of Basic Medical Sciences, China Medical University, Liaoning, China
| | - Haiyan Zhang
- Department of Pathology, The First People's Hospital of Jining, Shandong, China
| | - Yuchen Han
- Departments of Pathology, School of Basic Medical Sciences, China Medical University, Liaoning, China.,Department of Pathology, The First Affiliated Hospital of China Medical University, Liaoning, China.,Department of Pathology, Shanghai Chest Hospital, Shanghai, China
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24
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Garbicz F, Mehlich D, Rak B, Sajjad E, Maksymowicz M, Paskal W, Zieliński G, Włodarski PK. Increased expression of the microRNA 106b~25 cluster and its host gene MCM7 in corticotroph pituitary adenomas is associated with tumor invasion and Crooke's cell morphology. Pituitary 2017; 20:450-463. [PMID: 28432562 PMCID: PMC5508039 DOI: 10.1007/s11102-017-0805-y] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
PURPOSE MCM7 (minichromosome maintenance complex component 7), a DNA replication licensing factor, is a host gene for the oncogenic miR-106b~25 cluster. It has been recently revealed as a relevant prognostic biomarker in a variety of cancers, including pituitary adenomas. The purpose of this study was to assess whether miR-106b~25 and MCM7 levels correlate with tumor invasiveness in a cohort of ACTH-immunopositive adenomas. METHODS Tissue samples were obtained intraoperatively from 25 patients with pituitary adenoma. Tumor invasiveness was assessed according to the Knosp grading scale. MCM7, Ki-67 and TP53 levels were assessed by immunohistochemical staining, while the expression of miR-106b-5p, miR-93-5p, miR-93-3p and miR-25-3p were measured using quantitative real-time PCR performed on RNA isolated from FFPE tissues. RESULTS We have found a significant increase in MCM7 and Ki-67 labeling indices in invasive ACTHomas. Moreover, MCM7 was ubiquitously overexpressed in Crooke's cell adenomas. The expression of miR-93-5p was significantly elevated in invasive compared to noninvasive tumors. In addition, all four microRNAs from the miR-106b~25 cluster displayed marked upregulation in Crooke's cell adenomas. Remarkably, MCM7 and miR-106b-5p both strongly correlated with Knosp grade. A combination of MCM7 LI and miR-106b~25 cluster expression was able to accurately differentiate invasive from noninvasive tumors and had a significant discriminatory ability to predict postoperative tumor recurrence/progression. CONCLUSIONS miR-106b~25 and its host gene MCM7 are potential novel biomarkers for invasive ACTH-immunopositive pituitary adenomas. Additionally, they are both significantly upregulated in rare Crooke's cell adenomas and might therefore contribute to their aggressive phenotype.
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Affiliation(s)
- Filip Garbicz
- Laboratory of Centre for Preclinical Research, Department of Histology and Embryology, Medical University of Warsaw, Banacha 1B, 02-091, Warsaw, Poland
| | - Dawid Mehlich
- Laboratory of Centre for Preclinical Research, Department of Histology and Embryology, Medical University of Warsaw, Banacha 1B, 02-091, Warsaw, Poland
| | - Beata Rak
- Laboratory of Centre for Preclinical Research, Department of Histology and Embryology, Medical University of Warsaw, Banacha 1B, 02-091, Warsaw, Poland
- Postgraduate School of Molecular Medicine, Warsaw, Poland
- Department of Internal Diseases and Endocrinology, Public Central Teaching Hospital Medical University of Warsaw, Warsaw, Poland
| | - Emir Sajjad
- Laboratory of Centre for Preclinical Research, Department of Histology and Embryology, Medical University of Warsaw, Banacha 1B, 02-091, Warsaw, Poland
- Department of Neurosurgery, Military Institute of Medicine, Warsaw, Poland
| | - Maria Maksymowicz
- Department of Pathology and Laboratory Diagnostics, M. Skłodowska-Curie Memorial Cancer Centre and Institute of Oncology, Warsaw, Poland
| | - Wiktor Paskal
- Laboratory of Centre for Preclinical Research, Department of Histology and Embryology, Medical University of Warsaw, Banacha 1B, 02-091, Warsaw, Poland
| | - Grzegorz Zieliński
- Department of Neurosurgery, Military Institute of Medicine, Warsaw, Poland
| | - Paweł K Włodarski
- Laboratory of Centre for Preclinical Research, Department of Histology and Embryology, Medical University of Warsaw, Banacha 1B, 02-091, Warsaw, Poland.
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25
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Kondo H, Shimono Y, Mukohyama J, Tanaka Y, Shibuya N, Minami H, Kakeji Y, Suzuki A. Discordance of MCM7 mRNA and its Intronic MicroRNA Levels Under Hypoxia. Anticancer Res 2017; 37:3885-3890. [PMID: 28668890 DOI: 10.21873/anticanres.11769] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 05/26/2017] [Accepted: 06/29/2017] [Indexed: 11/10/2022]
Abstract
BACKGROUND Intronic microRNAs (miRNAs) are considered to be transcribed using their host gene promoter. However, about one third of intronic miRNAs are predicted to have independent promoter elements. MATERIALS AND METHODS Human breast cancer cells were cultured under normoxia or hypoxia, and expression levels of intronic miR-106b-25 cluster miRNAs and their host gene minichromosome maintenance complex component 7 (MCM7) transcripts were analyzed by semi-quantitative polymerase chain reaction. The putative promoter element of miR-106b-25 cluster was analyzed by chromatin immunoprecipitation and luciferase assays. RESULTS Exposure to hypoxia reduced the expression of MCM7 mRNA and a primary transcript of miR-106b-25 cluster, but did not affect that of mature miRNAs. The putative promoter element of miR-106b-25 cluster was not bound by hypoxia-inducible factor 1-alpha (HIF1-α), and was not activated under hypoxia. CONCLUSION Maintenance of miR-106b-25 cluster miRNA levels under hypoxia was not caused by the activation of an independent promoter element.
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Affiliation(s)
- Hiroki Kondo
- Division of Molecular and Cellular Biology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yohei Shimono
- Division of Molecular and Cellular Biology, Kobe University Graduate School of Medicine, Kobe, Japan .,Division of Medical Oncology/Hematology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Junko Mukohyama
- Division of Molecular and Cellular Biology, Kobe University Graduate School of Medicine, Kobe, Japan.,Division of Gastrointestinal Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yasuteru Tanaka
- Division of Molecular and Cellular Biology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Naoki Shibuya
- Division of Molecular and Cellular Biology, Kobe University Graduate School of Medicine, Kobe, Japan.,Division of Gastrointestinal Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Hironobu Minami
- Division of Medical Oncology/Hematology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yoshihiro Kakeji
- Division of Gastrointestinal Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Akira Suzuki
- Division of Molecular and Cellular Biology, Kobe University Graduate School of Medicine, Kobe, Japan
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26
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Gonzaga ACR, Campolina-Silva GH, Werneck-Gomes H, Moura-Cordeiro JD, Santos LC, Mahecha GAB, Morais-Santos M, Oliveira CA. Profile of cell proliferation and apoptosis activated by the intrinsic and extrinsic pathways in the prostate of aging rats. Prostate 2017; 77:937-948. [PMID: 28480526 DOI: 10.1002/pros.23349] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Accepted: 03/06/2017] [Indexed: 11/08/2022]
Abstract
BACKGROUND Estrogens acting through the receptors ERα and ERβ participate in prostate normal growth and cancer. ERβ is highly expressed in the prostate epithelium, playing pro-apoptotic, anti-proliferative, and pro-differentiation roles. Apoptosis is activated by the intrinsic pathway after castration and by the extrinsic pathway after ERβ agonist treatment. This differential activation of apoptotic pathways is important since a major problem in the treatment of prostate cancer is the recurrence of tumors after androgen withdrawal. However, a comprehensive study about the pattern of apoptosis in the aging prostate is lacking, a knowledge gap that we aimed to address herein. METHODS Cellular age-related proliferative and apoptotic profiles of prostate tissue obtained from aging Wistar rats were evaluated. Cell death (caspase-3, -8, -9, TNFα) was assessed by immunohistochemistry, immunofluorescence, and TUNEL. Cell proliferation (MCM7) and cell survival factors (ERK1/2, p-ERK1/2, p-Akt, and NF-κB) were determined by immunohistochemistry. RESULTS As the rats aged, the number of proliferating cells gradually reduced in the normal epithelium of all prostate lobes, while increasing in focal areas of intraepithelial proliferation. Interestingly, in areas of intraepithelial proliferation, we observed a reduction in the number of cells positive for caspase-3, -8, and -9. Regardless the animal's age, few prostate epithelial cells were positive for caspase-3, caspase-9, and TUNEL. In contrast, a progressive increase was seen in the positivity for caspase-8, especially in the atrophic epithelium of ventral prostate, which coincided with a reduction in TNFα immunoreaction. However, morphology of most caspase-8 positive cells suggests that they were not apoptotic. We also found reduced ERβ expression in the same areas. Possibly, low levels of the pro-apoptotic inductors TNFα and ERβ direct caspase-8 activity to an alternative pro-survival role in the atrophic epithelium. This hypothesis is supported by the increased expression of the key survival factors (ERK1/2, p-ERK1/2, p-Akt, and NF-κB) in these areas. CONCLUSIONS Our findings reveal that, as the animals age, there is an increase of proliferation in restricted areas of the prostate epithelium, and a concomitant reduction of the apoptosis rate with an increase in cell survival induced by caspase-8, indicating a focused and spontaneous disruption of tissue homeostasis.
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Affiliation(s)
- Amanda C R Gonzaga
- Department of Morphology, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Gabriel H Campolina-Silva
- Department of Morphology, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Hipácia Werneck-Gomes
- Department of Morphology, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Júnia D Moura-Cordeiro
- Department of Morphology, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Letícia C Santos
- Department of Morphology, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Germán A B Mahecha
- Department of Morphology, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Mônica Morais-Santos
- Department of Morphology, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Cleida A Oliveira
- Department of Morphology, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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27
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Yang JY, Li D, Zhang Y, Guan BX, Gao P, Zhou XC, Zhou CJ. The Expression of MCM7 is a Useful Biomarker in the Early Diagnostic of Gastric Cancer. Pathol Oncol Res 2017; 24:367-372. [PMID: 28540486 DOI: 10.1007/s12253-017-0251-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Accepted: 05/04/2017] [Indexed: 12/15/2022]
Abstract
The aim of this study was to investigate the expression of minichromosome maintenance complex component 7 (MCM7) in gastric mucosal lesions, further to find its potential effect as a biomarker to distinguish intraepithelial neoplasia from gastric mucosal lesions. MCM7 and Ki67 were detected in 93 cases of gastric mucosal lesions by immunohistochemistry. MCM7 and Ki67 expression in GT were lowest compared with other groups (P<0.001), meanwhile there were significant differences compared with Group IM and other groups in MCM7 and Ki67 expression (P<0.001). MCM7 and Ki67 expression in GSC were highest (P<0.05). Groups of LGN, HGN and GIC had no significant differences in MCM7 expression (P>0.05), but there was significant difference compared with Group LGN and Group GIC in Ki67 expression (P<0.05). MCM7 expression elevated with tumor grade increasing and had positive correlation with Ki67 significantly (r=0.940, P<0.001). Furthermore, in some cases, some tumor cells were immunoreactive to MCM7 but negative to Ki67. So we concluded that MCM7 is helpful for us to make differential diagnosis in pathological grade, MCM7 combination of Ki67 may serve as more sensitive proliferation markers for evaluation of gastric carcinoma and precancerous lesions.
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Affiliation(s)
- Jing-Yan Yang
- Department of Pathology, The Second Hospital of Shandong University, 247#, BeiYuan Street, Jinan, Shandong, 250033, People's Republic of China
| | - Dong Li
- Department of Orthopedics, Shandong Provincial Hospital Affiliated to Shandong University, 324#, Jing 5 Road, Jinan, Shandong, 250021, People's Republic of China
| | - Yuan Zhang
- Center of Evidence-based Medicine, The Second Hospital of Shandong University, 247#, BeiYuan Street, Jinan, Shandong, 250033, People's Republic of China
| | - Bing-Xin Guan
- Department of Pathology, The Second Hospital of Shandong University, 247#, BeiYuan Street, Jinan, Shandong, 250033, People's Republic of China
| | - Ping Gao
- Yantai Affiliated Hospital of Binzhou Medical University, 717#, Jinbu Road, Muping District, Yantai, Shandong, 264100, People's Republic of China
| | - Xing-Chen Zhou
- Department of Pathology, The Second Hospital of Shandong University, 247#, BeiYuan Street, Jinan, Shandong, 250033, People's Republic of China
| | - Cheng-Jun Zhou
- Department of Pathology, The Second Hospital of Shandong University, 247#, BeiYuan Street, Jinan, Shandong, 250033, People's Republic of China.
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Lee JS, Cheong HS, Koh Y, Ahn KS, Shin HD, Yoon SS. MCM7 polymorphisms associated with the AML relapse and overall survival. Ann Hematol 2016; 96:93-98. [PMID: 27837251 DOI: 10.1007/s00277-016-2844-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Accepted: 09/25/2016] [Indexed: 11/30/2022]
Abstract
The minichromosome maintenance complex component 7 (MCM7) encodes a member of MCM complex, which plays a critical role in the initiation of gene replication. Due to the importance of MCM complex, MCM7 gene has been regarded as a candidate gene for cancer development. In the present study, seven MCM7 polymorphisms were genotyped in 344 subjects composed of 103 acute myeloid leukemia (AML) patients and 241 normal controls to examine the possible associations between MCM7 polymorphisms and the risk of AML. MCM7 polymorphisms were not associated with the risk of AML (P > 0.05). However, MCM7 polymorphisms were significantly related to the relapse of AML and overall survival. The rs2070215 (N144S) showed a protective effect to the risk of AML relapse (OR = 0.37; P corr = 0.02). In haplotype analyses, the ht1 and ht2 showed significant associations with the risk of AML relapse (P corr = 0.02-0.03). In addition, rs1534309 showed an association with the overall survival of AML patients. Patients with major homozygote genotype (CC) of rs1534309 showed a higher survival rate than the patients with other genotypes (CG and GG). The results of the present study indicate that MCM7 polymorphisms may be able to predict the prognosis of AML patients.
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MESH Headings
- Adolescent
- Adult
- Aged
- Female
- Humans
- Leukemia, Myeloid, Acute/diagnosis
- Leukemia, Myeloid, Acute/genetics
- Leukemia, Myeloid, Acute/mortality
- Male
- Middle Aged
- Minichromosome Maintenance Complex Component 7/genetics
- Neoplasm Recurrence, Local/diagnosis
- Neoplasm Recurrence, Local/genetics
- Neoplasm Recurrence, Local/mortality
- Polymorphism, Single Nucleotide/genetics
- Survival Rate/trends
- Young Adult
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Affiliation(s)
- Jin Sol Lee
- Research Institute for Basic Science, Sogang University, Seoul, 121-742, Republic of Korea
- Department of Life Science, Sogang University, Seoul, 121-742, Republic of Korea
| | - Hyun Sub Cheong
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, South Korea
- Department of Genetic Epidemiology, SNP Genetics Inc., Seoul, South Korea
| | - Youngil Koh
- Department of Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, 101 Daehang-ro, Jongno-gu, Seoul, 110-744, South Korea
| | - Kwang-Sung Ahn
- Functional Genome Institute, PDXen Biosystem Inc., Seoul, South Korea
| | - Hyoung Doo Shin
- Department of Life Science, Sogang University, Seoul, 121-742, Republic of Korea
- Department of Genetic Epidemiology, SNP Genetics Inc., Seoul, South Korea
| | - Sung-Soo Yoon
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, South Korea.
- Department of Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, 101 Daehang-ro, Jongno-gu, Seoul, 110-744, South Korea.
- Clinical Research Institute, Seoul National University Hospital, Seoul, South Korea.
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Okazaki S, Boku S, Otsuka I, Mouri K, Aoyama S, Shiroiwa K, Sora I, Fujita A, Shirai Y, Shirakawa O, Kokai M, Hishimoto A. The cell cycle-related genes as biomarkers for schizophrenia. Prog Neuropsychopharmacol Biol Psychiatry 2016; 70:85-91. [PMID: 27216283 DOI: 10.1016/j.pnpbp.2016.05.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 05/17/2016] [Accepted: 05/18/2016] [Indexed: 12/27/2022]
Abstract
BACKGROUND Recent studies suggest that genomic abnormalities such as single nucleotide polymorphisms (SNPs) and copy number variations (CNVs) may elevate the risk of schizophrenia. Such genomic abnormalities often occur during chromosomal DNA replication in the S phase of cell cycle. In addition, several studies showed that abnormal expressions of several cell cycle-related genes are associated with schizophrenia. Therefore, here we compared mRNA expression levels of cell cycle-related genes in peripheral blood cells between patients with schizophrenia and healthy controls. METHOD mRNA expression levels of cell cycle-related genes in peripheral blood cells from patients with schizophrenia and healthy controls were measured with quantitative reverse transcription polymerase chain reaction (Q-RT-PCR). The discovery, replication and intervention studies with Q-RT-PCR were performed as follows: discovery (40 cases and 20 controls), replication (82 cases and 74 controls) and intervention (22 cases and 18 controls). RESULT Nine genes were identified in the discovery and replication stages as schizophrenia-associated genes. Moreover, the combination of mRNA expression levels of CDK4, MCM7 and POLD4 was identified as a potential biomarker for schizophrenia with multivariate logistic regression analysis. The intervention stage revealed that the mRNA expression levels of these three genes were significantly decreased in the acute state of schizophrenia, and CDK4 was significantly recovered in the remission state of schizophrenia. CONCLUSION The combination of mRNA expression levels of three cell cycle-related genes such as CDK4, MCM7 and POLD4 is expected to be a candidate for useful biomarkers for schizophrenia. Especially, the mRNA expression changes of CDK4 may be potential as both trait and state markers for schizophrenia.
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Affiliation(s)
- Satoshi Okazaki
- Department of Psychiatry, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Shuken Boku
- Department of Psychiatry, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Ikuo Otsuka
- Department of Psychiatry, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Kentaro Mouri
- Department of Psychiatry, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Shinsuke Aoyama
- Department of Psychiatry, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Kyoichi Shiroiwa
- Department of Psychiatry, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Ichiro Sora
- Department of Psychiatry, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Aiko Fujita
- Department of Psychiatry, Hyogo Prefectural Kofu Hospital, Kobe, Japan
| | - Yutaka Shirai
- Department of Psychiatry, Shoseikai Minatogawa Hospital, Kobe, Japan
| | - Osamu Shirakawa
- Department of Neuropsychiatry, Kinki University School of Medicine, Osaka, Japan
| | - Masahiro Kokai
- Department of Neuropsychiatry, Hyogo College of Medicine, Hyogo, Japan
| | - Akitoyo Hishimoto
- Department of Psychiatry, Kobe University Graduate School of Medicine, Kobe, Japan.
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Choy B, LaLonde A, Que J, Wu T, Zhou Z. MCM4 and MCM7, potential novel proliferation markers, significantly correlated with Ki-67, Bmi1, and cyclin E expression in esophageal adenocarcinoma, squamous cell carcinoma, and precancerous lesions. Hum Pathol 2016; 57:126-135. [PMID: 27476776 PMCID: PMC5250507 DOI: 10.1016/j.humpath.2016.07.013] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 07/06/2016] [Accepted: 07/15/2016] [Indexed: 12/09/2022]
Abstract
Minichromosomal maintenance (MCM) proteins are participants of DNA replication and may represent more accurate markers in determining the proliferative fraction within a tumor than proliferative marker Ki-67. Our study investigated the correlation between MCM4 and MCM7 expression and Ki-67, Bmi1, and cyclin E expression in esophageal adenocarcinoma, squamous cell carcinoma, and precancerous lesions. MCM4 and MCM7 expression had similar distribution as Ki-67 and Bmi1 expression in esophageal carcinoma and pre-cancerous lesions. The mean percentage of MCM4, MCM7, and Ki-67 expression increased from squamous epithelium (5.5%, 7.3%, and 5.9%, respectively), to columnar cell metaplasia (11.2, 13.5%, and 3.4%), Barrett's esophagus (27.7%, 35.3%, and 8.3%), low-grade dysplasia (42.6%, 52.2%, and 12.9%), high-grade dysplasia (63.2%, 77.7%, and 29.6%), adenocarcinoma (61.3%, 75.5%, and 24.5%), and squamous cell carcinoma (74.1, 85.4%, and 36.3%). The percentages of MCM4 and MCM7 expression were significantly higher than Ki-67 expression. Using univariate analysis we found a high percentage of MCM4 expression (>70%) to be significantly associated with lymph node metastasis and shorter survival in the adenocarcinoma group. We also demonstrated the percentage of MCM4 and MCM7 expression to be significantly correlated with Ki-67, Bmi1, and cyclin E expression in esophageal carcinoma and precancerous lesions. MCM4 and MCM7 may serve as more sensitive proliferative markers for the evaluation of esophageal lesions.
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Affiliation(s)
- Bonnie Choy
- Department of Pathology, University of Chicago, Chicago, IL 60637
| | - Amy LaLonde
- Department of Biostatistics and Computational Biology, University of Rochester Medical Center, Rochester, NY 14642
| | - Jianwen Que
- Center for Human Development & Division of Digestive and Liver Diseases, Columbia University Medical Center, NY 10032
| | - Tongtong Wu
- Department of Biostatistics and Computational Biology, University of Rochester Medical Center, Rochester, NY 14642
| | - Zhongren Zhou
- Department of Pathology and Laboratory Medicine, University of Rochester, Rochester, NY 14642.
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Karavias D, Maroulis I, Papadaki H, Gogos C, Kakkos S, Karavias D, Bravou V. Overexpression of CDT1 Is a Predictor of Poor Survival in Patients with Hepatocellular Carcinoma. J Gastrointest Surg 2016; 20:568-79. [PMID: 26408331 DOI: 10.1007/s11605-015-2960-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 09/16/2015] [Indexed: 01/31/2023]
Abstract
BACKGROUND Genomic instability is a common feature in hepatocellular carcinoma. Deregulation of replication licensing factors has been shown to trigger DNA damage response contributing to genomic instability. Overexpression of DNA replication licensing factors chromatin licensing and DNA replication factor 1 (CDT1) and minichromosome maintenance complex component 7 (MCM7) has been previously reported in several human cancers. The aim of the present study was to evaluate the expression and prognostic significance of CDT1 and MCM7 in association with DNA damage response markers and p53 in patients with hepatocellular carcinoma. METHODS Expression of CDT1, MCM7, p-H2A histone family member X (H2AX), phospho-ataxia telangiectasia-mutated (ATM)/ataxia telangiectasia rad3-related (ATR) substrate, and p53 was evaluated by immunohistochemistry on formalin-fixed paraffin-embedded surgical specimens from 111 patients who underwent hepatectomy for hepatocellular carcinoma. Statistical analysis was performed to evaluate associations between the studied proteins, clinicopathological parameters, and patient survival. RESULTS CDT1 expression correlated with p-H2AX (p = 0.038), while MCM7 correlated with p-H2AX and phospho-ATM/ATR substrate (p < 0.001). Increased CDT1 expression was associated with higher tumor grade (p = 0.006) and tumor-node-metastasis (TNM) stage (p = 0.033). High CDT1 expression correlated significantly with reduced overall survival (60.8 and 26.5 % vs 82.8 and 53.0 %, for low CDT1 expression, at 2 and 5 years, respectively, p = 0.012) and was identified by multivariate analysis as an independent predictor of poor overall survival (p = 0.049). CONCLUSIONS Overexpression of CDT1 and MCM7 in hepatocellular carcinoma correlates with DNA damage response, and CDT1 overexpression is a significant prognostic biomarker in hepatocellular carcinoma.
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Affiliation(s)
- Dimitrios Karavias
- Department of Surgery, University Hospital of Patras, Rio, 26500, Greece.
| | - Ioannis Maroulis
- Department of Surgery, University Hospital of Patras, Rio, 26500, Greece
| | - Helen Papadaki
- Department of Anatomy, Histology and Embryology, School of Medicine, University of Patras, Rio, Greece
| | - Charalambos Gogos
- Department of Internal Medicine, University Hospital of Patras, Rio, Greece
| | - Stavros Kakkos
- Department of Vascular Surgery, University Hospital of Patras, Rio, Greece
| | | | - Vasiliki Bravou
- Department of Anatomy, Histology and Embryology, School of Medicine, University of Patras, Rio, Greece
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Li KKW, Xia T, Ma FMT, Zhang R, Mao Y, Wang Y, Zhou L, Lau KM, Ng HK. miR-106b is overexpressed in medulloblastomas and interacts directly with PTEN. Neuropathol Appl Neurobiol 2015; 41:145-64. [PMID: 25041637 DOI: 10.1111/nan.12169] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2014] [Accepted: 06/25/2014] [Indexed: 12/13/2022]
Abstract
AIMS MicroRNAs (miRNAs) are an abundant group of small non-coding RNAs that have been implicated in tumorigenesis. They regulate expression of target genes by complementary base pairing. The purposes of this study were to delineate miR-106b expression in medulloblastoma (MB) and to explore its functional contributions to MB pathogenesis. METHODS We analysed expression of miR-106b in 32 MB samples by quantitative RT-PCR. We applied gain- and loss-of-function strategies to delineate the functional roles of miR-106b in MB. Luciferase reporter assay was conducted to confirm target gene of miR-106b. RESULTS Expression of miR-106b was overexpressed in MB, and was significantly associated with its host gene MCM7 (P = 0.020). Transfection of miR-106b inhibitor in MB cell lines markedly reduced cell proliferation, migration and invasion potential, and tumour sphere formation. Cell cycle analysis indicated that miR-106b inhibition induced G1 arrest and apoptosis. The cell cycle regulators, p21 and cyclin D1, and apoptotic marker cleaved PARP were differentially expressed in miR-106b inhibitor-transfected cells. PTEN was identified as a direct target gene of miR-106b. Luciferase reporter assay confirmed miR-106b directly interacted with the 3' UTR of PTEN. We found miR-106b directly targeted PTEN at transcriptional and translational levels. Immunohistochemistry revealed a trend between PTEN and miR-106b in MB tumours (P = 0.07). CONCLUSIONS These data suggested the upregulation of miR-106b in MB and the involvement of miR-106b in MB biology.
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Affiliation(s)
- Kay Ka-Wai Li
- Department of Anatomical and Cellular Pathology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, China; Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China
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Eberhardt U, Beker H, Vesterholt J. Decrypting the Hebeloma crustuliniforme complex: European species of Hebeloma section Denudata subsection Denudata (Agaricales). Persoonia 2015; 35:101-47. [PMID: 26823631 PMCID: PMC4713102 DOI: 10.3767/003158515x687704] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Accepted: 10/20/2014] [Indexed: 11/25/2022]
Abstract
Hebeloma subsection Denudata includes the type of H. section Denudata, Hebeloma crustuliniforme, as well as the majority of the taxa commonly included in the Hebeloma crustuliniforme complex. Complementing the work of D.K. Aanen and co-workers, and using refined morphological and molecular methods we were able to recognize further individual taxa within the section. Fifteen species occurring in Europe are assigned to H. subsect. Denudata. Of these, we describe eight species as new, namely H. aanenii, H. aurantioumbrinum, H. geminatum, H. louiseae, H. luteicystidiatum, H. pallidolabiatum, H. perexiguum and H. salicicola. Naucoria bellotiana, a species very similar to H. alpinum is recombined into Hebeloma. A key to Hebeloma subsect. Denudata is provided. We demonstrate that within this subsection there is good overall consistency between morphological, phylogenetic and biological species concepts. In contrast to current opinion, in this group there is little species overlap, particularly when also considering species frequencies, between arctic and alpine floras on one hand and temperate on the other.
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Affiliation(s)
- U. Eberhardt
- Staatliches Museum für Naturkunde Stuttgart, Rosenstein 1, D-70191 Stuttgart, Germany
- Ghent University, Dpt. Biology, K.L. Ledeganckstraat 35, B-9000 Gent, Belgium
| | - H.J. Beker
- Rue Père de Deken 19, B-1040 Bruxelles, Belgium
| | - J. Vesterholt
- Natural History Museum of Denmark, Gothersgade 130, DK-1123 Copenhagen K., Denmark. Deceased
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Haldar S, Roy A, Banerjee S. Differential regulation of MCM7 and its intronic miRNA cluster miR-106b-25 during megakaryopoiesis induced polyploidy. RNA Biol 2015; 11:1137-47. [PMID: 25483046 DOI: 10.4161/rna.36136] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Megakaryocytes exit from mitotic cell cycle and enter a phase of repeated DNA replication without undergoing cell division, in a process termed as endomitosis of which little is known. We studied the expression of a DNA replication licensing factor mini chromosome maintenance protein 7 (MCM7) and its intronic miR-106b-25 cluster during mitotic and endo-mitotic cycles in megakaryocytic cell lines and in vitro cultured megakaryocytes obtained from human cord blood derived CD34(+) cells. Our results show that contrary to mitotic cell cycle, endomitosis proceeds with an un-coupling of the expression of MCM7 and miR-106b-25. This was attributed to the presence of a transcript variant of MCM7 which undergoes nonsense mediated decay (NMD). Additionally, miR-25 which was up regulated during endomitosis was found to promote megakaryopoiesis by inhibiting the expression of PTEN. Our study thus highlights the importance of a transcript variant of MCM7 destined for NMD in the modulation of megakaryopoiesis.
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Affiliation(s)
- Srijan Haldar
- a Biophysics and Structural Genomics Division; Saha Institute of Nuclear Physics ; Kolkata , India
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Rutz N, Heilbronn R, Weger S. Interactions of cullin3/KCTD5 complexes with both cytoplasmic and nuclear proteins: Evidence for a role in protein stabilization. Biochem Biophys Res Commun 2015; 464:922-8. [PMID: 26188516 DOI: 10.1016/j.bbrc.2015.07.069] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Accepted: 07/14/2015] [Indexed: 01/09/2023]
Abstract
Based on its specific interaction with cullin3 mediated by an N-terminal BTB/POZ homologous domain, KCTD5 has been proposed to function as substrate adapter for cullin3 based ubiquitin E3 ligases. In the present study we tried to validate this hypothesis through identification and characterization of additional KCTD5 interaction partners. For the replication protein MCM7, the zinc finger protein ZNF711 and FAM193B, a yet poorly characterized cytoplasmic protein, we could demonstrate specific interaction with KCTD5 both in yeast two-hybrid and co-precipitation studies in mammalian cells. Whereas trimeric complexes of cullin3 and KCTD5 with the respective KCTD5 binding partner were formed, KCTD5/cullin3 induced polyubiquitylation and/or proteasome-dependent degradation of these binding partners could not be demonstrated. On the contrary, KCTD5 or Cullin3 overexpression increased ZNF711 protein stability.
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Affiliation(s)
- Natalja Rutz
- Institute of Virology, Campus Benjamin Franklin, Charité-University Medicine Berlin, Berlin, Germany
| | - Regine Heilbronn
- Institute of Virology, Campus Benjamin Franklin, Charité-University Medicine Berlin, Berlin, Germany
| | - Stefan Weger
- Institute of Virology, Campus Benjamin Franklin, Charité-University Medicine Berlin, Berlin, Germany.
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Abd El-Rehim DM, Gayyed MF. Does Immunohistochemistry for Discovered on GIST1 and Minichromosome Maintenance Protein7 Provide Additional Clinicopathological Value in Gastrointestinal Stromal Tumors? World J Oncol 2015; 6:355-363. [PMID: 28983330 PMCID: PMC5624661 DOI: 10.14740/wjon918w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/20/2015] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND The aim of the study was to investigate the expression of discovered on GIST 1 (DOG1) and minichromosome maintenance protein 7 (MCM7) in addition to the traditional markers, C-KIT and Ki-67, in gastrointestinal stromal tumors (GISTs) to specify the diagnosis and to evaluate their clinicopathological significance in GIST patients. METHODS Hematoxylin and eosin sections of 43 GISTs were re-examined to review histopathological criteria and risk stratification of these tumors. Immunohistochemistry for DOG1, C-KIT, MCM7, Ki-67 antibodies was performed. RESULTS Positive DOG1 and C-KIT expressions were found in 42 (97.7%) and 39 (90.7%) of cases, respectively. DOG1 and C-KIT expression scores were significantly correlated (P < 0.001). Among four C-KIT-negative GISTs, three cases were DOG1-positive. DOG1 was more sensitive and specific than C-KIT in the diagnosis of GISTs. High DOG1 expression scores were significantly associated with tumor size (P = 0.023) and risk (P = 0.037). Significant positive correlation was noted between MCM7 and Ki-67 labeling indices (LIs) (P < 0.001, r = 0.885). MCM7 demonstrated higher proliferation LIs than Ki-67. Significant associations were found between MCM7 and Ki-67 LIs and tumor size (P = 0.001 and 0.003 respectively), mitotic rate (P < 0.001 both) and risk stratification (P < 0.001 both) with a stepwise increase in MCM7 LIs with increasing tumor risk. CONCLUSION DOG1 is an important diagnostic tool for GISTs particularly in C-KIT-negative tumors. It may have a role in GISTs tumorogenesis and progression. Despite the established clinicopathological value of Ki-67 in GISTs, detection of MCM7 expression is recommended as a prognostic adjunct, given its better sensitivity for cellular proliferation and stepwise association with tumor risk.
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Zhang XX, Yu RL, Dai XS, Xie Q. Prognostic significance of expression of MCM7 and CDX2 in stage Ⅱ colorectal cancer. Shijie Huaren Xiaohua Zazhi 2015; 23:495-501. [DOI: 10.11569/wcjd.v23.i3.495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the expression of mini-chromosome maintenance protein 7 (MCM7) and caudal-related homeobox gene 2 (CDX2) in stage Ⅱ colorectal cancer (CRC) and to analyze their correlation with pathological characteristics and prognosis.
METHODS: Immunohistochemistry was used to detect the expression of MCM7 and CDX2 in 220 pairs of stage Ⅱ CRC and adjacent normal tissues. Differential MCM7 and CDX2 expression was analyzed according to the donors' pathological features and prognosis.
RESULTS: MCM7 expression in CRC tissues was significantly higher than that in corresponding adjacent normal tissues (P < 0.001), whereas CDX2 abundance in malignant tissues was dramatically lower compared with corresponding normal counterparts (P < 0.01). Moreover, MCM7 was correlated inversely with tumor differentiation, whereas CDX2 was positively related to tumor differentiation. Kaplan-Meier survival analysis revealed that MCM7-/CDX2+patients had a better outcome.
CONCLUSION: The elevated expression of MCM7 and decreased expression of CDX2 could be combined to act as a prognostic factor for stage Ⅱ CRC.
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Zhong X, Chen X, Guan X, Zhang H, Ma Y, Zhang S, Wang E, Zhang L, Han Y. Overexpression of G9a and MCM7 in oesophageal squamous cell carcinoma is associated with poor prognosis. Histopathology 2014; 66:192-200. [PMID: 24805087 DOI: 10.1111/his.12456] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2014] [Accepted: 05/01/2014] [Indexed: 11/28/2022]
Abstract
AIMS Histone methyltransferase G9a has been primarily understood as a co-repressor of gene expression, but it has been shown that G9a also positively regulates nuclear receptor-mediated transcription. MCM7, a critical component of the DNA replication licensing complex, is amplified and overexpressed in a variety of human malignancies. The objectives of the present study were to study the relationship between the expression of G9a and MCM7 and the pathological grade, clinical stage and prognosis of oesophageal squamous cell carcinoma (OSCC). METHODS AND RESULTS We collected 139 formalin-fixed and paraffin-embedded tissues from patients with OSCC and surveyed them by tissue microarray-based immunohistochemical staining. Associations between the expression of MCM7 and G9a and clinicopathological parameters and prognosis of OSCC were examined. From tissue microarray immunohistochemistry staining results, we found that nuclear staining intensity for MCM7 and G9a was associated with histological grade (both P < 0.001), tumour depth (P = 0.050, 0.034), lymph node metastasis (P = 0.001, 0.009) and tumour stage (P < 0.001, =0.003). G9a expression was correlated with that of MCM7. G9a overexpression independently predicted poor cancer-specific survival in OSCC (hazard ratio 0.05, 95% confidence interval 0.006-0.417, P = 0.006) and MCM7 (hazard ratio 0.05, 95% confidence interval 0.013-0.441, P = 0.004). OSCC patients whose tumours showed double-positive expression of G9a and MCM7 (G9a(+) MCM7(+) ) had much shorter survival than those from either the G9a or MCM7 low expression groups (G9a(-) MCM7(-) , G9a(+) MCM7(-) , G9a(-) MCM7(+) ). CONCLUSIONS MCM7 and G9a may serve as effective prognostic factors and could also be used as biomarkers for predicting various clinical outcomes of OSCCs in the Chinese population.
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Affiliation(s)
- Xinwen Zhong
- Department of Thoracic Surgery, The First Affiliated Hospital, China Medical University, Shenyang, China
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Ishibashi Y, Kinugasa T, Akagi Y, Ohchi T, Gotanda Y, Tanaka N, Fujino S, Yuge K, Kibe S, Yoshida N, Mizobe T, Oka Y, Yoshida T, Shirouzu K. Minichromosome maintenance protein 7 is a risk factor for recurrence in patients with Dukes C colorectal cancer. Anticancer Res 2014; 34:4569-4575. [PMID: 25075101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND It has been hypothesized that minichromosome maintenance (MCM) proteins, which are replicative control factors, can be used to detect tumor proliferation. The aim of the present study was to investigate the expression of MCM in colorectal cancer tissues and correlate it to clinical outcomes. PATIENTS AND METHODS The study included 145 patients with colorectal cancer who underwent curative surgery, from January 2002 until December 2004, at the Kurume University Hospital in Fukuoka, Japan. The median follow-up duration was 87 months. The expression of MCM7 in tissues was studied by immuno-histochemical staining. The labeling index (LI) of MCM7 was calculated by dividing the number of positively-stained cells by the total number of cells counted. We divided samples into two groups: positive (MCM7 LI 76% or higher) and negative (MCM7 LI less than 76%). RESULTS In patients with Dukes A and B, there were no significant differences in either overall survival (OS) or recurrence-free survival (RFS) between patents with MCM7-positive and those with MCM7-negative disease. On the other hand, in patients with Dukes C, there was significantly worse OS and RFS for patients with MCM7-positive compared to those with MCM7-negative disease. CONCLUSION We found that the expression of MCM7 is an independent risk factor for RFS in patients with Dukes C colorectal cancer. Further studies are required to investigate the validity of MCM7 protein expression for its potential clinical use in colorectal cancer therapy and prognosis.
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Affiliation(s)
- Yoshiaki Ishibashi
- Department of Surgery, Kurume University School of Medicine, Fukuoka, Japan
| | - Tetsushi Kinugasa
- Department of Surgery, Kurume University School of Medicine, Fukuoka, Japan
| | - Yoshito Akagi
- Department of Surgery, Kurume University School of Medicine, Fukuoka, Japan
| | - Takafumi Ohchi
- Department of Surgery, Kurume University School of Medicine, Fukuoka, Japan
| | - Yukito Gotanda
- Department of Surgery, Kurume University School of Medicine, Fukuoka, Japan
| | - Natsuki Tanaka
- Department of Surgery, Kurume University School of Medicine, Fukuoka, Japan
| | - Shinya Fujino
- Department of Surgery, Kurume University School of Medicine, Fukuoka, Japan
| | - Kotaro Yuge
- Department of Surgery, Kurume University School of Medicine, Fukuoka, Japan
| | - Shiro Kibe
- Department of Surgery, Kurume University School of Medicine, Fukuoka, Japan
| | - Naohiro Yoshida
- Department of Surgery, Kurume University School of Medicine, Fukuoka, Japan
| | - Tomoaki Mizobe
- Department of Surgery, Kurume University School of Medicine, Fukuoka, Japan
| | - Yosuke Oka
- Department of Surgery, Kurume University School of Medicine, Fukuoka, Japan
| | - Takefumi Yoshida
- Department of Surgery, Kurume University School of Medicine, Fukuoka, Japan
| | - Kazuo Shirouzu
- Department of Surgery, Kurume University School of Medicine, Fukuoka, Japan
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Wei Q, Li J, Liu T, Tong X, Ye X. Phosphorylation of minichromosome maintenance protein 7 ( MCM7) by cyclin/cyclin-dependent kinase affects its function in cell cycle regulation. J Biol Chem 2013; 288:19715-25. [PMID: 23720738 DOI: 10.1074/jbc.m112.449652] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
MCM7 is one of the subunits of the MCM2-7 complex that plays a critical role in DNA replication initiation and cell proliferation of eukaryotic cells. After forming the pre-replication complex (pre-RC) with other components, the MCM2-7 complex is activated by DDK/cyclin-dependent kinase to initiate DNA replication. Each subunit of the MCM2-7 complex functions differently under regulation of various kinases on the specific site, which needs to be investigated in detail. In this study, we demonstrated that MCM7 is a substrate of cyclin E/Cdk2 and can be phosphorylated on Ser-121. We found that the distribution of MCM7-S121A is different from wild-type MCM7 and that the MCM7-S121A mutant is much less efficient to form a pre-RC complex with MCM3/MCM5/cdc45 compared with wild-type MCM7. By using the Tet-On inducible HeLa cell line, we revealed that overexpression of wild-type MCM7 but not MCM7-S121A can block S phase entry, suggesting that an excess of the pre-RC complex may activate the cell cycle checkpoint. Further analysis indicates that the Chk1 pathway is activated in MCM7-overexpressed cells in a p53-dependent manner. We performed experiments with the human normal cell line HL-7702 and also observed that overexpression of MCM7 can cause S phase block through checkpoint activation. In addition, we found that MCM7 could also be phosphorylated by cyclin B/Cdk1 on Ser-121 both in vitro and in vivo. Furthermore, overexpression of MCM7-S121A causes an obvious M phase exit delay, which suggests that phosphorylation of MCM7 on Ser-121 in M phase is very important for a proper mitotic exit. These data suggest that the phosphorylation of MCM7 on Ser-121 by cyclin/Cdks is involved in preventing DNA rereplication as well as in regulation of the mitotic exit.
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Affiliation(s)
- Qian Wei
- Chinese Academy of Sciences Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
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Tretter ED, Johnson EM, Wang Y, Kandel P, White MM. Examining new phylogenetic markers to uncover the evolutionary history of early-diverging fungi: comparing MCM7, TSR1 and rRNA genes for single- and multi-gene analyses of the Kickxellomycotina. Persoonia 2013; 30:106-25. [PMID: 24027350 DOI: 10.3767/003158513X666394] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2012] [Accepted: 01/02/2013] [Indexed: 11/30/2022]
Abstract
The recently recognised protein-coding genes MCM7 and TSR1 have shown significant promise for phylogenetic resolution within the Ascomycota and Basidiomycota, but have remained unexamined within other fungal groups (except for Mucorales). We designed and tested primers to amplify these genes across early-diverging fungal clades, with emphasis on the Kickxellomycotina, zygomycetous fungi with characteristic flared septal walls forming pores with lenticular plugs. Phylogenetic tree resolution and congruence with MCM7 and TSR1 were compared against those inferred with nuclear small (SSU) and large subunit (LSU) rRNA genes. We also combined MCM7 and TSR1 data with the rDNA data to create 3- and 4-gene trees of the Kickxellomycotina that help to resolve evolutionary relationships among and within the core clades of this subphylum. Phylogenetic inference suggests that Barbatospora, Orphella, Ramicandelaber and Spiromyces may represent unique lineages. It is suggested that these markers may be more broadly useful for phylogenetic studies among other groups of early-diverging fungi.
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