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Ding W, Shangguan L, Li H, Bao Y, Noor F, Haseeb A, Sun P, Zhang H, Yin W, Fan K, Yang H, Zhang Z, Sun N. Dietary supplementation of osthole and icariin improves the production performance of laying hens by promoting follicular development. Poult Sci 2024; 103:103579. [PMID: 38430778 PMCID: PMC10920958 DOI: 10.1016/j.psj.2024.103579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 02/15/2024] [Accepted: 02/16/2024] [Indexed: 03/05/2024] Open
Abstract
Osthole (Ost) and icariin (Ica) are extracted from traditional Chinese medicine Cnidium monnieri and Epimedii Folium, respectively, and both exhibit estrogen-like biological activity. This study aimed to determine the efficacy and safety of combining Ost with Ica on the production performance of laying hens and to explore their possible mechanisms. The production performance, egg quality, residues of Ost and Ica in eggs, serum reproductive hormone levels, expression of ovarian reproductive hormone receptor, proliferation of granulosa cells in small yellow follicles (SYF), and progesterone secretion in large yellow follicles (LYF) related genes and proteins expression were detected. The results showed that adding 2 mg/kg Ost + 2 mg/kg Ica to the feed increased the laying rate, average egg weight, Haugh unit, and protein height of laying hens. Serum follicle-stimulating hormone (FSH), luteinizing hormone (LH), and progesterone (P4) levels increased, and the expression of ovarian estrogen receptor (ER), follicle-stimulating hormone receptor (FSHR), and progesterone receptor (PGR) mRNA was up-regulated. Additionally, the mRNA and protein levels of steroidogenesis acute regulatory protein (StAR), cytochrome P450 side-chain cleavage (P450scc), and 3β-hydroxysteroid dehydrogenase (3β-HSD) increased in LYF. Furthermore, mRNA and protein levels of proliferating cell nuclear antigen (PCNA), cyclin E1, and cyclin A2 were up-regulated in SYF. The residues of Ost and Ica in egg samples were not detected by high-performance liquid chromatography (HPLC). In conclusion, dietary supplementation of Ost and Ica increased granulosa cells proliferation in SYF and increased P4 secretion in granulosa cells of LYF, ultimately improving the production performance of laying hens.
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Affiliation(s)
- Wenwen Ding
- Shanxi key laboratory for modernization of TCVM, College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, China
| | - Linhui Shangguan
- Shanxi key laboratory for modernization of TCVM, College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, China
| | - Hongquan Li
- Shanxi key laboratory for modernization of TCVM, College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, China
| | - Yinghui Bao
- Shanxi key laboratory for modernization of TCVM, College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, China; Huanshan Group Co., Ltd, Qingdao 266000, Shandong, China
| | - Fida Noor
- Shanxi key laboratory for modernization of TCVM, College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, China
| | - Abdul Haseeb
- Shanxi key laboratory for modernization of TCVM, College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, China
| | - Panpan Sun
- Shanxi key laboratory for modernization of TCVM, College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, China
| | - Hua Zhang
- Shanxi key laboratory for modernization of TCVM, College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, China
| | - Wei Yin
- Shanxi key laboratory for modernization of TCVM, College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, China
| | - Kuohai Fan
- Shanxi key laboratory for modernization of TCVM, College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, China; Laboratory Animal Center, Shanxi Agricultural University, Taigu 030801, Shanxi, China
| | - Huizhen Yang
- Shanxi key laboratory for modernization of TCVM, College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, China
| | - Zhenbiao Zhang
- Shanxi key laboratory for modernization of TCVM, College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, China
| | - Na Sun
- Shanxi key laboratory for modernization of TCVM, College of Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, Shanxi, China.
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He Y, Huang X, Ma Y, Yang G, Cui Y, Lv X, Zhao R, Jin H, Tong Y, Zhang X, Li J, Peng M. A novel aging-associated lncRNA signature for predicting prognosis in osteosarcoma. Sci Rep 2024; 14:1386. [PMID: 38228673 PMCID: PMC10791644 DOI: 10.1038/s41598-024-51732-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 01/09/2024] [Indexed: 01/18/2024] Open
Abstract
Osteosarcoma (OS) is one of the most prevalent bone tumors in adolescents, and the correlation between aging and OS remains unclear. Currently, few accurate and reliable biomarkers have been determined for OS prognosis. To address this issue, we carried out a detailed bioinformatics analysis based on OS with data from the Cancer Genome Atlas data portal and Human Aging Genomic Resources database, as well as in vitro experiments. A total of 88 OS samples with gene expression profiles and corresponding clinical characteristics were obtained. Through univariate Cox regression analysis and survival analysis, 10 aging-associated survival lncRNAs (AASRs) were identified to be associated with the overall survival of OS patients. Based on the expression levels of the 10 AASRs, the OS patients were classified into two clusters (Cluster A and Cluster B). Cluster A had a worse prognosis, while Cluster B had a better prognosis. Then, 5 AASRs were ultimately included in the signature through least absolute shrinkage and selection operator-Cox regression analysis. Kaplan‒Meier survival analysis verified that the high-risk group exhibited a worse prognosis than the low-risk group. Furthermore, univariate and multivariate Cox regression analyses confirmed that the riskScore was an independent prognostic factor for OS patients. Subsequently, we discovered that the risk signature was correlated with the properties of the tumor microenvironment and immune cell infiltration. Specifically, there was a positive association between the risk model and naïve B cells, resting dendritic cells and gamma delta T cells, while it was negatively related to CD8+ T cells. Finally, in vitro experiments, we found that UNC5B-AS1 inhibited OS cells from undergoing cellular senescence and apoptosis, thereby promoting OS cells proliferation. In conclusion, we constructed and verified a 5 AASR-based signature, that exhibited excellent performance in evaluating the overall survival of OS patients. In addition, we found that UNC5B-AS1 might inhibit the senescence process, thus leading to the development and progression of OS. Our findings may provide novel insights into the treatment of OS patients.
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Affiliation(s)
- Yi He
- Department of Mini-Invasive Spinal Surgery, The Third People's Hospital of Henan Province, Zhengzhou, 450006, Henan, China
| | - Xiao Huang
- Department of Clinical Laboratory, Luohe Central Hospital, Luohe, 462300, Henan, China
| | - Yajie Ma
- Department of Medical Affair, The Third People's Hospital of Henan Province, Zhengzhou, 450006, Henan, China
| | - Guohui Yang
- Department of Emergency Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, Henan, China
| | - Yuqing Cui
- General ICU, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, Henan, China
| | - Xuefeng Lv
- Department of Clinical Laboratory, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, Henan, China
| | - Rongling Zhao
- Department of Clinical Laboratory, The Third People's Hospital of Henan Province, Zhengzhou, 450006, Henan, China
| | - Huifang Jin
- Department of Blood Transfusion, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, Henan, China
| | - Yalin Tong
- Department of Digestion, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, Henan, China
| | - Xinyu Zhang
- Department of Medical Affair, The Third People's Hospital of Henan Province, Zhengzhou, 450006, Henan, China
| | - Jitian Li
- Henan Luoyang Orthopedic Hospital (Henan Provincial Orthopedic Hospital), Henan Provincial Orthopedic Institute, Henan University of Chinese Medicine, 100 Yongping Road, Zhengzhou, 450000, Henan, China.
| | - Mengle Peng
- Department of Clinical Laboratory, The Third People's Hospital of Henan Province, Zhengzhou, 450006, Henan, China.
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Wang X, Zhang S, Zhang Z, Mazloum NA, Lee EYC, Lee MYW. The DHX9 helicase interacts with human DNA polymerase δ4 and stimulates its activity in D-loop extension synthesis. DNA Repair (Amst) 2023; 128:103513. [PMID: 37285751 DOI: 10.1016/j.dnarep.2023.103513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 04/28/2023] [Accepted: 05/11/2023] [Indexed: 06/09/2023]
Abstract
The extension of the invading strand within a displacement loop (D-loop) is a key step in homology directed repair (HDR) of doubled stranded DNA breaks. The primary goal of these studies was to test the hypotheses that 1) D-loop extension by human DNA polymerase δ4 (Pol δ4) is facilitated by DHX9, a 3' to 5' motor helicase, which acts to unwind the leading edge of the D-loop, and 2) the recruitment of DHX9 is mediated by direct protein-protein interactions between DHX9 and Pol δ4 and/or PCNA. DNA synthesis by Pol δ4 was analyzed in a reconstitution assay by the extension of a 93mer oligonucleotide inserted into a plasmid to form a D-loop. Product formation by Pol δ4 was monitored by incorporation of [α-32P]dNTPs into the 93mer primer followed by denaturing gel electrophoresis. The results showed that DHX9 strongly stimulated Pol δ4 mediated D-loop extension. Direct interactions of DHX9 with PCNA, the p125 and the p12 subunits of Pol δ4 were demonstrated by pull-down assays with purified proteins. These data support the hypothesis that DHX9 helicase is recruited by Pol δ4/PCNA to facilitate D-loop synthesis in HDR, and is a participant in cellular HDR. The involvement of DHX9 in HDR represents an important addition to its multiple cellular roles. Such helicase-polymerase interactions may represent an important aspect of the mechanisms involved in D-loop primer extension synthesis in HDR.
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Affiliation(s)
- Xiaoxiao Wang
- Department of Biochemistry and Molecular Biology, New York Medical College, 15 Dana Road, Valhalla, NY 10595, USA
| | - Sufang Zhang
- Department of Biochemistry and Molecular Biology, New York Medical College, 15 Dana Road, Valhalla, NY 10595, USA
| | - Zhongtao Zhang
- Department of Biochemistry and Molecular Biology, New York Medical College, 15 Dana Road, Valhalla, NY 10595, USA
| | - Nayef A Mazloum
- Department of Biochemistry and Molecular Biology, New York Medical College, 15 Dana Road, Valhalla, NY 10595, USA
| | - Ernest Y C Lee
- Department of Biochemistry and Molecular Biology, New York Medical College, 15 Dana Road, Valhalla, NY 10595, USA
| | - Marietta Y W Lee
- Department of Biochemistry and Molecular Biology, New York Medical College, 15 Dana Road, Valhalla, NY 10595, USA.
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Ibrahim MA, Khalifa AM, Mohamed AA, Galhom RA, Korayem HE, Abd El-Fadeal NM, Abd-Eltawab Tammam A, Khalifa MM, Elserafy OS, Abdel-Karim RI. Bone-Marrow-Derived Mesenchymal Stem Cells, Their Conditioned Media, and Olive Leaf Extract Protect against Cisplatin-Induced Toxicity by Alleviating Oxidative Stress, Inflammation, and Apoptosis in Rats. TOXICS 2022; 10:toxics10090526. [PMID: 36136492 PMCID: PMC9504158 DOI: 10.3390/toxics10090526] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 08/26/2022] [Accepted: 09/01/2022] [Indexed: 06/01/2023]
Abstract
BACKGROUND Hepatic and renal damage is a cisplatin (Cis)-induced deleterious effect that is a major limiting factor in clinical chemotherapy. OBJECTIVES The current study was designed to investigate the influence of pretreatment with olive leaf extract (OLE), bone-marrow-derived mesenchymal stem cells (BM-MSC), and their conditioned media (CM-MSC) against genotoxicity, nephrotoxicity, hepatotoxicity, and immunotoxicity induced by cisplatin in rats. METHODS The rats were randomly divided into six groups (six rats each) as follows: Control; OLE group, treated with OLE; Cis group, treated with a single intraperitoneal dose of Cis (7 mg/kg bw); Cis + OLE group, treated with OLE and cisplatin; Cis + CM-MSC group, treated with BM-MSC conditioned media and Cis; and Cis + MSC group, treated with BM-MSC in addition to Cis. RESULTS Cis resulted in a significant deterioration in hepatic and renal functions and histological structures. Furthermore, it increased inflammatory markers (TNF-α, IL-6, and IL-1β) and malondialdehyde (MDA) levels and decreased glutathione (GSH) content, total antioxidant capacity (TAC), catalase (CAT), and superoxide dismutase (SOD) activity in hepatic and renal tissues. Furthermore, apoptosis was evident in rat tissues. A significant increase in serum 8-hydroxy-2-deoxyguanosine (8-OH-dG), nitric oxide (NO) and lactate dehydrogenase (LDH), and a decrease in lysozyme activity were detected in Cis-treated rats. OLE, CM-MSC, and BM-MSC have significantly ameliorated Cis-induced deterioration in hepatic and renal structure and function and improved oxidative stress and inflammatory markers, with preference to BM-MSC. Moreover, apoptosis was significantly inhibited, evident from the decreased expression of Bax and caspase-3 genes and upregulation of Bcl-2 proteins in protective groups as compared to Cis group. CONCLUSIONS These findings indicate that BM-MSC, CM-MSC, and OLE have beneficial effects in ameliorating cisplatin-induced oxidative stress, inflammation, and apoptosis in the hepatotoxicity, nephrotoxicity, immunotoxicity, and genotoxicity in a rat model.
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Affiliation(s)
- Mahrous A. Ibrahim
- Forensic Medicine and Clinical Toxicology, College of Medicine, Jouf University, Sakaka 41412, Saudi Arabia
- Forensic Medicine and Clinical Toxicology Department, Faculty of Medicine, Suez Canal University (SCU), Ismailia 41522, Egypt or
| | - Athar M. Khalifa
- Pathology Department, College of Medicine, Jouf University, Sakaka 41412, Saudi Arabia
| | - Alaa A. Mohamed
- Medical Biochemistry Division, Pathology Department, College of Medicine, Jouf University, Sakaka 41412, Saudi Arabia
- Medical Biochemistry Department, Faculty of Medicine, Beni-Suef University, Beni-Suef 62514, Egypt
| | - Rania A. Galhom
- Human Anatomy and Embryology Department, Faculty of Medicine, Suez Canal University (SCU), Ismailia 41522, Egypt
- Center of Excellence in Molecular and Cellular Medicine (CEMCM), Faculty of Medicine, Suez Canal University (SCU), Ismailia 41522, Egypt
- Human Anatomy and Embryology Department, Faculty of Medicine, Badr University in Cairo (BUC), Cairo 11829, Egypt
| | - Horeya E. Korayem
- Histology and Cell Biology Department, Faculty of Medicine, Suez Canal University (SCU), Ismailia 41522, Egypt
| | - Noha M. Abd El-Fadeal
- Center of Excellence in Molecular and Cellular Medicine (CEMCM), Faculty of Medicine, Suez Canal University (SCU), Ismailia 41522, Egypt
- Medical Biochemistry and Molecular Biology Department, Faculty of Medicine, Suez Canal University (SCU), Ismailia 41522, Egypt
- Oncology Diagnostic Unit, Faculty of Medicine, Suez Canal University (SCU), Ismailia 41522, Egypt
| | - Ahmed Abd-Eltawab Tammam
- Physiology Department, College of Medicine, Jouf University, Sakaka 41412, Saudi Arabia
- Physiology Department, Faculty of Medicine, Beni-Suef University, Beni-Suef 62514, Egypt
| | - Mohamed Mansour Khalifa
- Human Physiology Department, Faculty of Medicine, Cairo University, Cairo 11562, Egypt
- Human Physiology Department, College of Medicine, King Saud University, Riyadh 11472, Saudi Arabia
| | - Osama S. Elserafy
- Forensic Medicine and Clinical Toxicology Department, Faculty of Medicine, Cairo University, Cairo 11562, Egypt
- Criminal Justice and Forensic Sciences Department, King Fahd Security College, Riyadh 11451, Saudi Arabia
| | - Rehab I. Abdel-Karim
- Forensic Medicine and Clinical Toxicology Department, Faculty of Medicine, Suez Canal University (SCU), Ismailia 41522, Egypt or
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Wang B, Ntim M, Xia M, Wang Y, Lu JC, Yang JY, Li S. Long-Term Social Isolation-Induced Autophagy Inhibition and Cell Senescence Aggravate Cognitive Impairment in D(+)Galactose-Treated Male Mice. Front Aging Neurosci 2022; 14:777700. [PMID: 35401146 PMCID: PMC8988191 DOI: 10.3389/fnagi.2022.777700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 02/14/2022] [Indexed: 11/13/2022] Open
Abstract
Aging is associated with physiological and pathological changes and presents health complications, such as dementia. Isolation has also been associated with the experience of growing old. Both have been linked individually to the incidence of cognitive decline. In this present study, the effects of these two phenomena have been looked at in animal models where aging was induced with D(+)Galactose in mice who underwent long-term post-weaned social isolation (L-PWSI). Assessing cognitive function using Y-maze, Morris water maze (MWM), and passive avoidance tests (PATs) confirmed that cognition is impaired in either of the treatments but worsened when the D(+)Galactose mice were subjected to L-PWSI. Moreover, a synaptic protein, PSD95, and dendritic spines density were significantly reduced in the L-PWSI and D(+)Galactose-treated mice. Our previous study revealed that autophagy deficit is involved in cognitive impairment in the L-PWSI model. Here, we first report the inhibited cell cycle in L-PWSI, combined with the decreased autophagy, aggravates cognitive impairment in D(+)Galactose-treated mice. Beyond these, the autophagy and cell cycle mechanisms that link isolation and aging have been explored. The close association between isolation and aging in humans is very real and needs much research attention going forward for possible therapeutic interventions.
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Affiliation(s)
- Bin Wang
- Department of Physiology, College of Basic Medical Sciences, Liaoning Provincial Key Laboratory of Cerebral Diseases, National-Local Joint Engineering Research Center for Drug-Research and Development (R&D) of Neurodegenerative Diseases, Dalian Medical University, Dalian, China
| | - Michael Ntim
- Department of Physiology, College of Basic Medical Sciences, Liaoning Provincial Key Laboratory of Cerebral Diseases, National-Local Joint Engineering Research Center for Drug-Research and Development (R&D) of Neurodegenerative Diseases, Dalian Medical University, Dalian, China
- Department of Physiology, School of Medicine and Dentistry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Min Xia
- Department of Physiology, College of Basic Medical Sciences, Liaoning Provincial Key Laboratory of Cerebral Diseases, National-Local Joint Engineering Research Center for Drug-Research and Development (R&D) of Neurodegenerative Diseases, Dalian Medical University, Dalian, China
| | - Ying Wang
- Department of Physiology, College of Basic Medical Sciences, Liaoning Provincial Key Laboratory of Cerebral Diseases, National-Local Joint Engineering Research Center for Drug-Research and Development (R&D) of Neurodegenerative Diseases, Dalian Medical University, Dalian, China
- Department of Cardiology, Institute of Heart and Vessel Diseases of Dalian Medical University, The Second Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Jin-cheng Lu
- Department of Physiology, College of Basic Medical Sciences, Liaoning Provincial Key Laboratory of Cerebral Diseases, National-Local Joint Engineering Research Center for Drug-Research and Development (R&D) of Neurodegenerative Diseases, Dalian Medical University, Dalian, China
| | - Jin-Yi Yang
- Department of Urology, Affiliated Dalian Friendship Hospital of Dalian Medical University, Dalian, China
- *Correspondence: Jin-Yi Yang,
| | - Shao Li
- Department of Physiology, College of Basic Medical Sciences, Liaoning Provincial Key Laboratory of Cerebral Diseases, National-Local Joint Engineering Research Center for Drug-Research and Development (R&D) of Neurodegenerative Diseases, Dalian Medical University, Dalian, China
- Shao Li,
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Yu S, Qiao X, Song X, Yang Y, Zhang D, Sun W, Wang L, Song L. The proliferating cell nuclear antigen (PCNA) is a potential proliferative marker in oyster Crassostrea gigas. FISH & SHELLFISH IMMUNOLOGY 2022; 122:306-315. [PMID: 35176468 DOI: 10.1016/j.fsi.2022.02.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Revised: 02/08/2022] [Accepted: 02/10/2022] [Indexed: 06/14/2023]
Abstract
Proliferating cell nuclear antigen (PCNA) is a crucial eukaryotic replication accessory factor in the regulation of DNA synthesis, which is always used as a proliferation marker for haematopoiesis in vertebrates. In the present study, a homologue of PCNA (named as CgPCNA) with a conserved N-terminal PCNA domain and a C-terminal PCNA domain was identified from oyster Crassostrea gigas. The deduced amino acid sequence of CgPCNA shared 85.4% and 86.6% similarities with the PCNAs identified in Mus musculus and Homo sapiens, respectively. CgPCNA was firstly clustered with PCNAs from molluscs, and then with PCNAs from arthropods to form a group falling into the invertebrate clade in the phylogenic tree. The mRNA transcripts of CgPCNA were detected in all tested tissues with higher expression level in gonad, gills and haemolymph. They were also detected in granulocytes, semi-granulocytes and agranulocytes with no significant differences, but the protein level of CgPCNA in agranulocytes was significantly higher (3.67-fold, p < 0.05) than that in granulocytes. In the haemocytes, CgPCNA was mainly distributed in the nucleus and less in the cytoplasm of haemocytes. CgPCNA protein was observed at the tubule lumen regions of gills vessels, and especially colocalized with the EdU signals. After lipopolysaccharide (LPS) and Vibrio splendidus stimulation, the expression level of CgPCNA mRNA in haemocytes was significantly (p < 0.05) up-regulated at 6 h and 12 h, which was 13.87-fold and 3.89-fold of that in control, respectively. In the oysters treated with the recombinant protein CgAstakine (rCgAstakine), the protein abundance of CgPCNA was enhanced in agranulocytes and gills, while no significant change was observed in semi-granulocytes and granulocytes. These results collectively indicated that CgPCNA was highly expressed in the newborn agranulocytes and the potential haematopoietic sites, and it might be applied as a marker for haemocytes proliferation in oysters.
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Affiliation(s)
- Simiao Yu
- School of Life Science, Liaoning Normal University, Dalian, 116029, China; Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China
| | - Xue Qiao
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Southern Laboratory of Ocean Science and Engineering (Guangdong, Zhuhai), Zhuhai, 519000, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China
| | - Xiaorui Song
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Southern Laboratory of Ocean Science and Engineering (Guangdong, Zhuhai), Zhuhai, 519000, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China
| | - Ying Yang
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Southern Laboratory of Ocean Science and Engineering (Guangdong, Zhuhai), Zhuhai, 519000, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China
| | - Dan Zhang
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Southern Laboratory of Ocean Science and Engineering (Guangdong, Zhuhai), Zhuhai, 519000, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China
| | - Wending Sun
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Southern Laboratory of Ocean Science and Engineering (Guangdong, Zhuhai), Zhuhai, 519000, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China
| | - Lingling Wang
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Southern Laboratory of Ocean Science and Engineering (Guangdong, Zhuhai), Zhuhai, 519000, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China; Dalian Key Laboratory of Aquatic Animal Disease Prevention and Control, Dalian Ocean University, Dalian, 116023, China
| | - Linsheng Song
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Southern Laboratory of Ocean Science and Engineering (Guangdong, Zhuhai), Zhuhai, 519000, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China; Dalian Key Laboratory of Aquatic Animal Disease Prevention and Control, Dalian Ocean University, Dalian, 116023, China.
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7
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Wang Z, Lin Y, Jin S, Wei T, Zheng Z, Chen W. Bone marrow mesenchymal stem cells improve thymus and spleen function of aging rats through affecting P21/PCNA and suppressing oxidative stress. Aging (Albany NY) 2020; 12:11386-11397. [PMID: 32561691 PMCID: PMC7343510 DOI: 10.18632/aging.103186] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 03/09/2020] [Indexed: 12/13/2022]
Abstract
Bone marrow mesenchymal stem cells (BMSCs) have been considered to be an important regulator for immune function. We aim to prove the function improvement of aging spleen and thymus induced by BMSCs and unfold the specific mechanisms. Aging animal model was established using D-galactose. The morphological changes of spleen and thymus tissues were observed using hematoxylin-eosin staining and transmission electron microscopy. Key cytokines in the serum were measured with enzyme linked immunosorbent assay. Protein and mRNA levels of P16, P21, and PCNA were detected using western blotting and RT-qPCR. Special markers of BMSCs were identified using flow cytometry, and successful induction of BMSCs to steatoblast and osteoblasts was observed. Compared to aging model, BMSCs significantly increased the spleen and thymus index, improved the histological changes of spleen and thymus tissues. A remarkable increase of ratio between CD4+T cells and CD8+T cells, level of IL-2 was achieved by BMSCs. However, BMSCs markedly inhibited the content of IL-10, TNF-a, P16, and P21 but promoted PCNA. Significant inhibition of oxidative stress by BMSCs was also observed. We demonstrated that BMSCs significantly improved the tissue damage of aging spleen and thymus, BMSCs may improve aging organs through influencing cytokines, oxidative stress, and P21/PCNA.
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Affiliation(s)
- Zhihong Wang
- Provincial Clinical Medical College of Fujian Medical University, Fuzhou 350001, Fujian, China.,Department of Hematology, Fujian Provincial Hospital, Fuzhou 350001, Fujian, China
| | - Yun Lin
- Provincial Clinical Medical College of Fujian Medical University, Fuzhou 350001, Fujian, China.,Department of Hematology, Fujian Provincial Hospital, Fuzhou 350001, Fujian, China
| | - Shang Jin
- Provincial Clinical Medical College of Fujian Medical University, Fuzhou 350001, Fujian, China.,Department of Hematology, Fujian Provincial Hospital, Fuzhou 350001, Fujian, China
| | - Tiannan Wei
- Provincial Clinical Medical College of Fujian Medical University, Fuzhou 350001, Fujian, China.,Department of Hematology, Fujian Provincial Hospital, Fuzhou 350001, Fujian, China
| | - Zhihai Zheng
- Provincial Clinical Medical College of Fujian Medical University, Fuzhou 350001, Fujian, China.,Department of Hematology, Fujian Provincial Hospital, Fuzhou 350001, Fujian, China
| | - Weimin Chen
- Provincial Clinical Medical College of Fujian Medical University, Fuzhou 350001, Fujian, China.,Department of Hematology, Fujian Provincial Hospital, Fuzhou 350001, Fujian, China
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8
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Lee MYWT, Zhang S, Wang X, Chao HH, Zhao H, Darzynkiewicz Z, Zhang Z, Lee EYC. Two forms of human DNA polymerase δ: Who does what and why? DNA Repair (Amst) 2019; 81:102656. [PMID: 31326365 DOI: 10.1016/j.dnarep.2019.102656] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
DNA polymerase δ (Pol δ) plays a central role in lagging strand DNA synthesis in eukaryotic cells, as well as an important role in DNA repair processes. Human Pol δ4 is a heterotetramer of four subunits, the smallest of which is p12. Pol δ3 is a trimeric form that is generated in vivo by the degradation of the p12 subunit in response to DNA damage, and during entry into S-phase. The biochemical properties of the two forms of Pol δ, as well as the changes in their distribution during the cell cycle, are reviewed from the perspective of understanding their respective cellular functions. Biochemical and cellular studies support a role for Pol δ3 in gap filling during DNA repair, and in Okazaki fragment synthesis during DNA replication. Recent studies of cells in which p12 expression is ablated, and are therefore null for Pol δ4, show that Pol δ4 is not required for cell viability. These cells have a defect in homologous recombination, revealing a specific role for Pol δ4 that cannot be performed by Pol δ3. Pol δ4 activity is required for D-loop displacement synthesis in HR. The reasons why Pol δ4 but not Pol δ3 can perform this function are discussed, as well as the question of whether helicase action is needed for efficient D-loop displacement synthesis. Pol δ4 is largely present in the G1 and G2/M phases of the cell cycle and is low in S phase. This is discussed in relation to the availability of Pol δ4 as an additional layer of regulation for HR activity during cell cycle progression.
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Affiliation(s)
- Marietta Y W T Lee
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, USA.
| | - Sufang Zhang
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, USA
| | - Xiaoxiao Wang
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, USA
| | - Hsiao Hsiang Chao
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, USA
| | - Hong Zhao
- Department of Pathology, New York Medical College, Valhalla, USA
| | | | - Zhongtao Zhang
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, USA
| | - Ernest Y C Lee
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, USA
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9
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Lin H, Shangguan Z, Zhu M, Bao L, Zhang Q, Pan S. lncRNA FLVCR1‐AS1 silencing inhibits lung cancer cell proliferation, migration, and invasion by inhibiting the activity of the Wnt/β‐catenin signaling pathway. J Cell Biochem 2019; 120:10625-10632. [PMID: 30697812 DOI: 10.1002/jcb.28352] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 11/29/2018] [Indexed: 12/11/2022]
Affiliation(s)
- Heping Lin
- Department of Respiratory Diseases The Third Affiliated Hospital of Wenzhou Medical University Wenzhou China
| | - Zongxiao Shangguan
- Department of Respiratory Diseases The Third Affiliated Hospital of Wenzhou Medical University Wenzhou China
| | - Mengchu Zhu
- Department of Respiratory Diseases The Third Affiliated Hospital of Wenzhou Medical University Wenzhou China
| | - Lianmin Bao
- Department of Respiratory Diseases The Third Affiliated Hospital of Wenzhou Medical University Wenzhou China
| | - Qing Zhang
- Department of Clinical Laboratory The Third Affiliated Hospital of Wenzhou Medical University Wenzhou China
| | - Shenghua Pan
- Department of Pathology The Third Affiliated Hospital of Wenzhou Medical University Wenzhou China
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10
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Zhang S, Chao HH, Wang X, Zhang Z, Lee EYC, Lee MYWT. Loss of the p12 subunit of DNA polymerase delta leads to a defect in HR and sensitization to PARP inhibitors. DNA Repair (Amst) 2019; 73:64-70. [PMID: 30470508 PMCID: PMC6312503 DOI: 10.1016/j.dnarep.2018.11.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 11/08/2018] [Accepted: 11/08/2018] [Indexed: 01/07/2023]
Abstract
Human DNA polymerase δ is normally present in unstressed, non-dividing cells as a heterotetramer (Pol δ4). Its smallest subunit, p12, is transiently degraded in response to UV damage, as well as during the entry into S-phase, resulting in the conversion of Pol δ4 to a trimer (Pol δ3). In order to further understand the specific cellular roles of these two forms of Pol δ, the gene (POLD4) encoding p12 was disrupted by CRISPR/Cas9 to produce p12 knockout (p12KO) cells. Thus, Pol δ4 is absent in p12KO cells, leaving Pol δ3 as the sole source of Pol δ activity. GFP reporter assays revealed that the p12KO cells exhibited a defect in homologous recombination (HR) repair, indicating that Pol δ4, but not Pol δ3, is required for HR. Expression of Flag-tagged p12 in p12KO cells to restore Pol δ4 alleviated the HR defect. These results establish a specific requirement for Pol δ4 in HR repair. This leads to the prediction that p12KO cells should be more sensitive to chemotherapeutic agents, and should exhibit synthetic lethal killing by PARP inhibitors. These predictions were confirmed by clonogenic cell survival assays of p12KO cells treated with cisplatin and mitomycin C, and with the PARP inhibitors Olaparib, Talazoparib, Rucaparib, and Niraparib. The sensitivity to PARP inhibitors in H1299-p12KO cells was alleviated by expression of Flag-p12. These findings have clinical significance, as the expression levels of p12 could be a predictive biomarker of tumor response to PARP inhibitors. In addition, small cell lung cancers (SCLC) are known to exhibit a defect in p12 expression. Analysis of several SCLC cell lines showed that they exhibit hypersensitivity to PARP inhibitors, providing evidence that loss of p12 expression could represent a novel molecular basis for HR deficiency.
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Affiliation(s)
- Sufang Zhang
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY 10595, United States
| | - Hsiao Hsiang Chao
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY 10595, United States
| | - Xiaoxiao Wang
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY 10595, United States
| | - Zhongtao Zhang
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY 10595, United States
| | - Ernest Y C Lee
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY 10595, United States
| | - Marietta Y W T Lee
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY 10595, United States.
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11
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Zhao WP, Wang HW, Liu J, Tan PP, Lin L, Zhou BH. JNK/STAT signalling pathway is involved in fluoride-induced follicular developmental dysplasia in female mice. CHEMOSPHERE 2018; 209:88-95. [PMID: 29913403 DOI: 10.1016/j.chemosphere.2018.06.086] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Revised: 06/10/2018] [Accepted: 06/11/2018] [Indexed: 06/08/2023]
Abstract
Excessive fluoride (F) intake decreases the development of potential oocytes by inducing oxidative stress and apoptosis in female mice in our previous study. This study aims to investigate the underlying mechanisms of F-induced follicular developmental dysplasia. Pathomorphological changes in the ovary tissues were observed under light and transmission electron microscopes. DNA damage and proliferation in granulosa cells were analysed by TUNEL staining and BrdU measurement. The protein expression of cell proliferation related regulatory factors including JNK, STAT3, STAT5, CDK2, CDK4, PCNA and Ki67 in the ovary tissues was measured by immunohistochemistry and Western blot analyses. Results indicated that the structure of granulosa cells in the ovary was seriously damaged by excessive F, evident by the swollen endoplasmic reticulum, mitochondria with vacuoles and nucleus shrinkage. F treatment also considerably enhanced the apoptosis and inhibited the proliferation of granulosa cells. The number of granulosa cells around the oocyte decreased after F treatment. The expression levels of STAT3, CDK2, CDK4 and Ki67 in the ovary tissues were up-regulated, and STAT5 and PCNA did not change significantly after F treatment, whereas JNK expression was down-regulated with increasing F dose. In summary, changes in the expression levels of JNK, STAT3, STAT5, CDK2, CDK4, PCNA and Ki67 in the JNK/STAT signalling pathway are involved in F-induced follicular dysplasia in the ovary.
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Affiliation(s)
- Wen-Peng Zhao
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, Henan 471000, PR China
| | - Hong-Wei Wang
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, Henan 471000, PR China.
| | - Jing Liu
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, Henan 471000, PR China
| | - Pan-Pan Tan
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, Henan 471000, PR China
| | - Lin Lin
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, Henan 471000, PR China
| | - Bian-Hua Zhou
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, Henan 471000, PR China.
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12
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Tu L, Huang Q, Fu S, Liu D. Aberrantly expressed long noncoding RNAs in hypertrophic scar fibroblasts in vitro: A microarray study. Int J Mol Med 2018; 41:1917-1930. [PMID: 29393369 PMCID: PMC5810216 DOI: 10.3892/ijmm.2018.3430] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 01/23/2018] [Indexed: 12/29/2022] Open
Abstract
A hypertrophic scar is the result of abnormal repair of the body after trauma. Histopathologically, it is mostly the result of the excessive proliferation of fibroblasts and the accumulation of extracellular matrix. Accumulating evidence has demonstrated that long non-coding RNAs (lncRNAs) have a critical role in the regulation of gene expression and in the pathogenesis of diseases. However, the roles of lncRNAs in hypertrophic scars have remained elusive. The present study investigated the profiles of differentially expressed lncRNAs between fibroblasts derived from a hypertrophic scar and normal skin, and explored the possible mechanisms underlying the development of hypertrophic scars. Microarray data indicated that 6,104 lncRNAs and 2,952 mRNAs were differentially expressed. A set of differentially expressed transcripts as confirmed by reverse transcription-quantitative polymerase chain reaction. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathway enrichment analyses were performed to determine the principal functions of the significantly deregulated genes. Furthermore, associated expression networks, including subgroup analysis, competing endogenous RNAs (ceRNAs) and coding-noncoding co-expression networks were constructed using bioinformatics methods. The homology between differentially expressed lncRNAs and mRNAs was assessed and two exon lncRNA were selected to explore their regulatory mechanisms. The ceRNA network inferred that NR_125715 acted as a competing endogenous RNA, bound to microRNA (miR)-141-3p, miR-200a-3p and miR-29 to regulate the expression of the miRs' targets, including transforming growth factor β2 (TGFB2). Similarly, NR_046402 acted as a competing endogenous RNA, which bound to miR-133a-3p.1 and miR-4469 to then regulate the expression of the miRs' targets, including DNA polymerase δ1, catalytic subunit (POLD1). In addition, co-expression analysis indicated that the expression of lncRNAs NR_125715 and NR_046402 was correlated with that of TGFB2 and POLD1 mRNA. The identification of these differentially expressed lncRNAs in the hypertrophic scar-derived fibroblasts in the present study, may provide novel insight into the functional interactions of lncRNA, miRNA and mRNA, and lead to novel theories for the pathogenesis and treatment of hypertrophic scars.
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Affiliation(s)
- Longxiang Tu
- Institute of Burn Injuries, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Qi Huang
- Department of Nursing, Graduate School of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Shangfeng Fu
- Institute of Burn Injuries, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Dewu Liu
- Institute of Burn Injuries, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
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13
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Lee MYWT, Wang X, Zhang S, Zhang Z, Lee EYC. Regulation and Modulation of Human DNA Polymerase δ Activity and Function. Genes (Basel) 2017; 8:genes8070190. [PMID: 28737709 PMCID: PMC5541323 DOI: 10.3390/genes8070190] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 07/07/2017] [Accepted: 07/11/2017] [Indexed: 12/28/2022] Open
Abstract
This review focuses on the regulation and modulation of human DNA polymerase δ (Pol δ). The emphasis is on the mechanisms that regulate the activity and properties of Pol δ in DNA repair and replication. The areas covered are the degradation of the p12 subunit of Pol δ, which converts it from a heterotetramer (Pol δ4) to a heterotrimer (Pol δ3), in response to DNA damage and also during the cell cycle. The biochemical mechanisms that lead to degradation of p12 are reviewed, as well as the properties of Pol δ4 and Pol δ3 that provide insights into their functions in DNA replication and repair. The second focus of the review involves the functions of two Pol δ binding proteins, polymerase delta interaction protein 46 (PDIP46) and polymerase delta interaction protein 38 (PDIP38), both of which are multi-functional proteins. PDIP46 is a novel activator of Pol δ4, and the impact of this function is discussed in relation to its potential roles in DNA replication. Several new models for the roles of Pol δ3 and Pol δ4 in leading and lagging strand DNA synthesis that integrate a role for PDIP46 are presented. PDIP38 has multiple cellular localizations including the mitochondria, the spliceosomes and the nucleus. It has been implicated in a number of cellular functions, including the regulation of specialized DNA polymerases, mitosis, the DNA damage response, mouse double minute 2 homolog (Mdm2) alternative splicing and the regulation of the NADPH oxidase 4 (Nox4).
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Affiliation(s)
- Marietta Y W T Lee
- Department Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY 10595, USA.
| | - Xiaoxiao Wang
- Department Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY 10595, USA.
| | - Sufang Zhang
- Department Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY 10595, USA.
| | - Zhongtao Zhang
- Department Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY 10595, USA.
| | - Ernest Y C Lee
- Department Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY 10595, USA.
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14
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Wang X, Zhang S, Zheng R, Yue F, Lin SHS, Rahmeh AA, Lee EYC, Zhang Z, Lee MYWT. PDIP46 (DNA polymerase δ interacting protein 46) is an activating factor for human DNA polymerase δ. Oncotarget 2017; 7:6294-313. [PMID: 26819372 PMCID: PMC4868757 DOI: 10.18632/oncotarget.7034] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Accepted: 01/25/2016] [Indexed: 02/07/2023] Open
Abstract
PDIP46 (SKAR, POLDIP3) was discovered through its interaction with the p50 subunit of human DNA polymerase δ (Pol δ). Its functions in DNA replication are unknown. PDIP46 associates with Pol δ in cell extracts both by immunochemical and protein separation methods, as well as by ChIP analyses. PDIP46 also interacts with PCNA via multiple copies of a novel PCNA binding motif, the APIMs (AlkB homologue-2 PCNA-Interacting Motif). Sites for both p50 and PCNA binding were mapped to the N-terminal region containing the APIMs. Functional assays for the effects of PDIP46 on Pol δ activity on singly primed ssM13 DNA templates revealed that it is a novel and potent activator of Pol δ. The effects of PDIP46 on Pol δ in primer extension, strand displacement and synthesis through simple hairpin structures reveal a mechanism where PDIP46 facilitates Pol δ4 synthesis through regions of secondary structure on complex templates. In addition, evidence was obtained that PDIP46 is also capable of exerting its effects by a direct interaction with Pol δ, independent of PCNA. Mutation of the Pol δ and PCNA binding region resulted in a loss of PDIP46 functions. These studies support the view that PDIP46 is a novel accessory protein for Pol δ that is involved in cellular DNA replication. This raises the possibility that altered expression of PDIP46 or its mutation may affect Pol δ functions in vivo, and thereby be a nexus for altered genomic stability.
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Affiliation(s)
- Xiaoxiao Wang
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, New York, USA
| | - Sufang Zhang
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, New York, USA
| | - Rong Zheng
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, New York, USA
| | - Fu Yue
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, New York, USA
| | - Szu Hua Sharon Lin
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, New York, USA
| | - Amal A Rahmeh
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, New York, USA
| | - Ernest Y C Lee
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, New York, USA
| | - Zhongtao Zhang
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, New York, USA
| | - Marietta Y W T Lee
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, New York, USA
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15
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Zhao L, Washington MT. Translesion Synthesis: Insights into the Selection and Switching of DNA Polymerases. Genes (Basel) 2017; 8:genes8010024. [PMID: 28075396 PMCID: PMC5295019 DOI: 10.3390/genes8010024] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 01/04/2017] [Accepted: 01/04/2017] [Indexed: 01/05/2023] Open
Abstract
DNA replication is constantly challenged by DNA lesions, noncanonical DNA structures and difficult-to-replicate DNA sequences. Two major strategies to rescue a stalled replication fork and to ensure continuous DNA synthesis are: (1) template switching and recombination-dependent DNA synthesis; and (2) translesion synthesis (TLS) using specialized DNA polymerases to perform nucleotide incorporation opposite DNA lesions. The former pathway is mainly error-free, and the latter is error-prone and a major source of mutagenesis. An accepted model of translesion synthesis involves DNA polymerase switching steps between a replicative DNA polymerase and one or more TLS DNA polymerases. The mechanisms that govern the selection and exchange of specialized DNA polymerases for a given DNA lesion are not well understood. In this review, recent studies concerning the mechanisms of selection and switching of DNA polymerases in eukaryotic systems are summarized.
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Affiliation(s)
- Linlin Zhao
- Department of Chemistry and Biochemistry, Central Michigan University, Mount Pleasant, MI 48859, USA.
- Science of Advanced Materials Program, Central Michigan University, Mount Pleasant, MI 48859, USA.
| | - M Todd Washington
- Department of Biochemistry, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA.
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16
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Barnes R, Eckert K. Maintenance of Genome Integrity: How Mammalian Cells Orchestrate Genome Duplication by Coordinating Replicative and Specialized DNA Polymerases. Genes (Basel) 2017; 8:genes8010019. [PMID: 28067843 PMCID: PMC5295014 DOI: 10.3390/genes8010019] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 12/19/2016] [Accepted: 12/27/2016] [Indexed: 12/30/2022] Open
Abstract
Precise duplication of the human genome is challenging due to both its size and sequence complexity. DNA polymerase errors made during replication, repair or recombination are central to creating mutations that drive cancer and aging. Here, we address the regulation of human DNA polymerases, specifically how human cells orchestrate DNA polymerases in the face of stress to complete replication and maintain genome stability. DNA polymerases of the B-family are uniquely adept at accurate genome replication, but there are numerous situations in which one or more additional DNA polymerases are required to complete genome replication. Polymerases of the Y-family have been extensively studied in the bypass of DNA lesions; however, recent research has revealed that these polymerases play important roles in normal human physiology. Replication stress is widely cited as contributing to genome instability, and is caused by conditions leading to slowed or stalled DNA replication. Common Fragile Sites epitomize “difficult to replicate” genome regions that are particularly vulnerable to replication stress, and are associated with DNA breakage and structural variation. In this review, we summarize the roles of both the replicative and Y-family polymerases in human cells, and focus on how these activities are regulated during normal and perturbed genome replication.
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Affiliation(s)
- Ryan Barnes
- Biomedical Sciences Graduate Program, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA.
| | - Kristin Eckert
- Departments of Pathology and Biochemistry & Molecular Biology, The Jake Gittlen Laboratories for Cancer Research, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA.
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17
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Sang Y, Yan F, Ren X. The role and mechanism of CRL4 E3 ubiquitin ligase in cancer and its potential therapy implications. Oncotarget 2016; 6:42590-602. [PMID: 26460955 PMCID: PMC4767455 DOI: 10.18632/oncotarget.6052] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 09/23/2015] [Indexed: 12/21/2022] Open
Abstract
CRLs (Cullin-RING E3 ubiquitin ligases) are the largest E3 ligase family in eukaryotes, which ubiquitinate a wide range of substrates involved in cell cycle regulation, signal transduction, transcriptional regulation, DNA damage response, genomic integrity, tumor suppression and embryonic development. CRL4 E3 ubiquitin ligase, as one member of CRLs family, consists of a RING finger domain protein, cullin4 (CUL4) scaffold protein and DDB1–CUL4 associated substrate receptors. The CUL4 subfamily includes two members, CUL4A and CUL4B, which share extensively sequence identity and functional redundancy. Aberrant expression of CUL4 has been found in a majority of tumors. Given the significance of CUL4 in cancer, understanding its detailed aspects of pathogenesis of human malignancy would have significant value for the treatment of cancer. Here, the work provides an overview to address the role of CRL4 E3 ubiquitin ligase in cancer development and progression, and discuss the possible mechanisms of CRL4 ligase involving in many cellular processes associated with tumor. Finally, we discuss its potential value in cancer therapy.
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Affiliation(s)
- Youzhou Sang
- Department of Immunology, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China.,National Clinical Research Center of Cancer, Tianjin, China.,Key Laboratory of Cancer Immunology and Biotherapy, Tianjin, China
| | - Fan Yan
- Department of Immunology, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China.,National Clinical Research Center of Cancer, Tianjin, China.,Key Laboratory of Cancer Immunology and Biotherapy, Tianjin, China
| | - Xiubao Ren
- Department of Biotherapy, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China.,National Clinical Research Center of Cancer, Tianjin, China.,Key Laboratory of Cancer Immunology and Biotherapy, Tianjin, China
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18
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Huo S, Yu H, Li C, Zhang J, Liu T. Effect of halofuginone on the inhibition of proliferation and invasion of hepatocellular carcinoma HepG2 cell line. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2015; 8:15863-15870. [PMID: 26884857 PMCID: PMC4730070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 05/23/2015] [Accepted: 06/28/2015] [Indexed: 06/05/2023]
Abstract
Primary liver cancer is a common cancer and the mortality of liver cancer ranks the second of all malignancy-related deaths in China. The most common primary liver cancer is hepatocellular carcinoma, accounting for approximately 90% of the total. Because liver is the largest parenchymatous organ in the body undertaking all kinds of important metabolic functions, liver cancer inevitably causes greater harms and its treatment is extremely difficult. Currently, there are still no effective drugs for the treatment of patients with advanced inoperable liver cancer. We observed the strong inhibitory activity of halofuginone on HepG2 cell growth and the cell cycle and apoptosis assays showed that halofuginone arrested the cell cycle and inhibited the induction. And we found that halofuginone inhibits tumor cell cycle possibly by up-regulating p15 and p21 of expression. Then, we found that the proportion of cleaved PARP, caspase-3, 8 and 9 in HepG2 cells increased after halofuginone treatment. And the results showed that halofuginone down-regulated Mcl-1 and c-IAP1 expression. Finally, our results showed halofuginone regulated the activities of JNK and MEK/ERK signaling pathways in hepatocellular carcinoma cells. In summary, this study shows that halofuginone can inhibit the in vitro growth, arrest the cell cycle and induce the apoptosis of HepG2 cells. Its mechanisms of action may be related to the regulation of associated protein expression, up-regulation of JNK, and inhibition of MEK/ERK signaling pathway.
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Affiliation(s)
- Sibo Huo
- Department of Pharmacy, China-Japan Union Hospital, Jilin UniversityChangchun 130033 China
| | - Huiqiu Yu
- Department of Pharmacy, China-Japan Union Hospital, Jilin UniversityChangchun 130033 China
| | - Chusheng Li
- Department of Pharmacy, China-Japan Union Hospital, Jilin UniversityChangchun 130033 China
| | - Jiayu Zhang
- Department of Pharmacy, China-Japan Union Hospital, Jilin UniversityChangchun 130033 China
| | - Tongjun Liu
- Colorectal and Anal Surgery, China-Japan Union Hospital, Jilin UniversityChangchun 130033, China
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19
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Coleman KE, Grant GD, Haggerty RA, Brantley K, Shibata E, Workman BD, Dutta A, Varma D, Purvis JE, Cook JG. Sequential replication-coupled destruction at G1/S ensures genome stability. Genes Dev 2015; 29:1734-46. [PMID: 26272819 PMCID: PMC4561482 DOI: 10.1101/gad.263731.115] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Accepted: 07/23/2015] [Indexed: 11/29/2022]
Abstract
In this study, Coleman et al. investigated the temporal order of protein degradation among substrates of a single human E3 ubiquitin ligase, CRL4Cdt2, triggered by DNA synthesis. They show that differential CRL4Cdt2 targeting is regulated by a PCNA-interacting motif or “PIP degron” by manipulating the order of substrate degradation. These findings demonstrate that consecutive protein degradation is critical for normal S-phase progression. Timely ubiquitin-mediated protein degradation is fundamental to cell cycle control, but the precise degradation order at each cell cycle phase transition is still unclear. We investigated the degradation order among substrates of a single human E3 ubiquitin ligase, CRL4Cdt2, which mediates the S-phase degradation of key cell cycle proteins, including Cdt1, PR-Set7, and p21. Our analysis of synchronized cells and asynchronously proliferating live single cells revealed a consistent order of replication-coupled destruction during both S-phase entry and DNA repair; Cdt1 is destroyed first, whereas p21 destruction is always substantially later than that of Cdt1. These differences are attributable to the CRL4Cdt2 targeting motif known as the PIP degron, which binds DNA-loaded proliferating cell nuclear antigen (PCNADNA) and recruits CRL4Cdt2. Fusing Cdt1's PIP degron to p21 causes p21 to be destroyed nearly concurrently with Cdt1 rather than consecutively. This accelerated degradation conferred by the Cdt1 PIP degron is accompanied by more effective Cdt2 recruitment by Cdt1 even though p21 has higher affinity for PCNADNA. Importantly, cells with artificially accelerated p21 degradation display evidence of stalled replication in mid-S phase and sensitivity to replication arrest. We therefore propose that sequential degradation ensures orderly S-phase progression to avoid replication stress and genome instability.
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Affiliation(s)
- Kate E Coleman
- Curriculum in Genetics and Molecular Biology, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
| | - Gavin D Grant
- Department of Biochemistry and Biophysics, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
| | - Rachel A Haggerty
- Department of Genetics, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA; Curriculum in Bioinformatics and Computational Biology, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
| | - Kristen Brantley
- Department of Biochemistry and Biophysics, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
| | - Etsuko Shibata
- Department of Biochemistry and Molecular Genetics, University of Virginia School of Medicine, Charlottesville, Virginia 22908, USA
| | - Benjamin D Workman
- Department of Biochemistry and Biophysics, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
| | - Anindya Dutta
- Department of Biochemistry and Molecular Genetics, University of Virginia School of Medicine, Charlottesville, Virginia 22908, USA
| | - Dileep Varma
- Department of Cell and Molecular Biology, Northwestern University Feinberg School of Medicine, Chicago, Illinois 60611, USA
| | - Jeremy E Purvis
- Department of Genetics, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA; Curriculum in Bioinformatics and Computational Biology, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
| | - Jeanette Gowen Cook
- Curriculum in Genetics and Molecular Biology, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA; Department of Biochemistry and Biophysics, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
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Darzynkiewicz Z, Zhao H, Zhang S, Marietta YL, Ernest YL, Zhang Z. Initiation and termination of DNA replication during S phase in relation to cyclins D1, E and A, p21WAF1, Cdt1 and the p12 subunit of DNA polymerase δ revealed in individual cells by cytometry. Oncotarget 2015; 6:11735-50. [PMID: 26059433 PMCID: PMC4494901 DOI: 10.18632/oncotarget.4149] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2015] [Accepted: 05/03/2015] [Indexed: 12/18/2022] Open
Abstract
During our recent studies on mechanism of the regulation of human DNA polymerase δ in preparation for DNA replication or repair, multiparameter imaging cytometry as exemplified by laser scanning cytometry (LSC) has been used to assess changes in expression of the following nuclear proteins associated with initiation of DNA replication: cyclin A, PCNA, Ki-67, p21(WAF1), DNA replication factor Cdt1 and the smallest subunit of DNA polymerase δ, p12. In the present review, rather than focusing on Pol δ, we emphasize the application of LSC in these studies and outline possibilities offered by the concurrent differential analysis of DNA replication in conjunction with expression of the nuclear proteins. A more extensive analysis of the data on a correlation between rates of EdU incorporation, likely reporting DNA replication, and expression of these proteins, is presently provided. New data, specifically on the expression of cyclin D1 and cyclin E with respect to EdU incorporation as well as on a relationship between expression of cyclin A vs. p21(WAF1) and Ki-67 vs. Cdt1, are also reported. Of particular interest is the observation that this approach makes it possible to assess the temporal sequence of degradation of cyclin D1, p21(WAF1), Cdt1 and p12, each with respect to initiation of DNA replication and with respect to each other. Also the sequence or reappearance of these proteins in G2 after termination of DNA replication is assessed. The reviewed data provide a more comprehensive presentation of potential markers, whose presence or absence marks the DNA replicating cells. Discussed is also usefulness of these markers as indicators of proliferative activity in cancer tissues that may bear information on tumor progression and have a prognostic value.
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Affiliation(s)
- Zbigniew Darzynkiewicz
- Brander Cancer Research Institute, Department of Pathology, New York Medical College, Valhalla, NY
| | - Hong Zhao
- Brander Cancer Research Institute, Department of Pathology, New York Medical College, Valhalla, NY
| | - Sufang Zhang
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY
| | - Y.W.T. Lee Marietta
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY
| | - Y.C. Lee Ernest
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY
| | - Zhongtao Zhang
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY
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