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Liu AH, Sun XL, Liu DZ, Xu F, Feng SJ, Zhang SY, Li LZ, Zhou JL, Wang YT, Zhang L, Lin X, Gao SB, Yue X, Liu XM, Jin GH, Xu B. Epidemiological and clinical features of hypertrophic scar and keloid in Chinese college students: A university-based cross-sectional survey. Heliyon 2023; 9:e15345. [PMID: 37123979 PMCID: PMC10130857 DOI: 10.1016/j.heliyon.2023.e15345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 04/03/2023] [Accepted: 04/04/2023] [Indexed: 04/08/2023] Open
Abstract
Background Hypertrophic scar (HS) and keloid (KD) are common dermal fibroproliferative growth caused by pathological wound healing. HS's prevalence is currently undetermined in China. Though it primarily occurs in dark-skinned individuals, KD can develop in all races, and its prevalence among Chinese people is poorly documented. Objective To explore the present epidemiological status of them in Chinese college students. Methods We conducted a university-based cross-sectional study at one university in Fujian, China. A total of 1785 participants aged 16-34 years (mean age, 20.0 ± 2.0; 58.7% female) were enrolled and statistical analyses were performed. Results HS and KD were observed in 5.2% (95% confidence interval [CI]: 4.2-6.2) and 0.6% (95% CI: 0.3-1.0) of the population respectively. There was a significant difference by sex in HS (P < 0.05), but not in KD. The prevalence of HS and KD both showed a significant difference by age (P < 0.05), but not in ethnic and native place distribution. The occurrence of HS and KD were both concentrated in individuals 9-20 years old (HS: 77.2%; KD: 81.8%). They were mainly distributed in the upper limbs (52.1%; 64.3%), and the main cause was trauma (51.0%; 35.7%). In addition, male sex was a risk factor for HS (adjusted P < 0.001), and KD was associated with age ≥22 years and family history (adjusted P < 0.050). Conclusion HS and KD are common in Chinese college students, and more attention and research is warranted.
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Zhu LY, Yuan JB, Zhang L, He CX, Lin X, Xu B, Jin GH. Loss of MLL Induces Epigenetic Dysregulation of Rasgrf1 to Attenuate Kras-Driven Lung Tumorigenesis. Cancer Res 2022; 82:4153-4163. [PMID: 36098964 DOI: 10.1158/0008-5472.can-22-1475] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 08/01/2022] [Accepted: 09/09/2022] [Indexed: 12/14/2022]
Abstract
Menin is necessary for the formation of the menin/mixed lineage leukemia (MLL) complex and is recruited directly to chromatin. Menin is an important tumor suppressor in several cancer types, including lung cancer. Here, we investigated the role of MLL in menin-regulated lung tumorigenesis. Ablation of MLL suppressed KrasG12D-induced lung tumorigenesis in a genetically engineered mouse model. MLL deficiency decreased histone H3 lysine 4 trimethylation (H3K4me3) and subsequently suppressed expression of the Ras protein-specific guanine nucleotide-releasing factor 1 (Rasgrf1) gene. Rasgrf1 was essential for the GTP-bound active state of Kras and the activation of Kras downstream pathways as well as their cancer-promoting activities. MI-3, a small-molecule inhibitor targeting MLL, specifically inhibited the growth of Kras-mutated lung cancer cells in vitro and in vivo with minimal effect on wild-type Kras lung cancer growth. Together, these results demonstrate a novel tumor promoter function of MLL in mutant Kras-induced lung tumorigenesis and further indicate that specific blockade of the MLL-Rasgrf1 pathway may be a potential therapeutic strategy for the treatment of tumors containing Kras mutations. SIGNIFICANCE Activation of mutant Kras is dependent on MLL-mediated epigenetic regulation of Rasgrf1, conferring sensitivity to small-molecule inhibition of MLL in Kras-driven lung cancer.
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Affiliation(s)
- Ling-Yu Zhu
- Department of Basic Medical Sciences, School of Medicine, Xiamen University, Xiamen, Fujian, P.R. China
| | - Jun-Bo Yuan
- Department of Basic Medical Sciences, School of Medicine, Xiamen University, Xiamen, Fujian, P.R. China
| | - Li Zhang
- Department of Basic Medical Sciences, School of Medicine, Xiamen University, Xiamen, Fujian, P.R. China
| | - Chun-Xiao He
- Department of Basic Medical Sciences, School of Medicine, Xiamen University, Xiamen, Fujian, P.R. China
| | - Xiao Lin
- Department of Basic Medical Sciences, School of Medicine, Xiamen University, Xiamen, Fujian, P.R. China
| | - Bin Xu
- Department of Basic Medical Sciences, School of Medicine, Xiamen University, Xiamen, Fujian, P.R. China
| | - Guang-Hui Jin
- Department of Basic Medical Sciences, School of Medicine, Xiamen University, Xiamen, Fujian, P.R. China.,State Key Laboratory of Cellular Stress Biology, Xiamen University, Xiamen, Fujian, P.R. China
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3
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Zhang CJ, Xiang L, Chen XJ, Wang XY, Wu KC, Zhang BW, Chen DF, Jin GH, Zhang H, Chen YC, Liu WQ, Li ML, Ma Y, Jin ZB. Ablation of Mature miR-183 Leads to Retinal Dysfunction in Mice. Invest Ophthalmol Vis Sci 2020; 61:12. [PMID: 32176259 PMCID: PMC7401733 DOI: 10.1167/iovs.61.3.12] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Purpose The microRNA cluster miR-183C, which includes miR-183 and two other genes, is critical for multiple sensory systems. In mouse retina, removal of this cluster results in photoreceptor defects in polarization, phototransduction, and outer segment elongation. However, the individual roles of the three components of this cluster are not clearly known. We studied the separate role of mouse miR-183 in in vivo. Methods miR-183 knockout mice were generated using the CRISPR/Cas9 genome-editing system. Electroretinography were carried out to investigate the changes of retinal structures and function. miR-183 was overexpressed by subretinal adeno-associated virus (AAV) injection in vivo. Rnf217, a target of miR-183 was overexpressed by cell transfection of the photoreceptor-derived cell line 661W in vitro. RNA sequencing and quantitative real-time polymerase chain reaction (qRT-PCR) were performed to compare the gene expression changes in AAV-injected mice and transfected cells. Results The miR-183 knockout mice showed progressively attenuated electroretinogram responses. Over- or under-expression of Rnf217, a direct target of miR-183, misregulated expression of cilia-related BBSome genes. Rnf217 overexpression also led to compromised electroretinography responses in WT mice, indicating that it may contribute to functional abnormalities in miR-183 knockout mice. Conclusions miR-183 is essential for mouse retinal function mediated directly and indirectly through Rnf217 and cilia-related genes. Our findings provide valuable insights into the explanation and analysis of the regulatory role of the individual miR-183 in miR-183C.
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Qiu H, Jin BM, Wang ZF, Xu B, Zheng QF, Zhang L, Zhu LY, Shi S, Yuan JB, Lin X, Gao SB, Jin GH. MEN1 deficiency leads to neuroendocrine differentiation of lung cancer and disrupts the DNA damage response. Nat Commun 2020; 11:1009. [PMID: 32081882 PMCID: PMC7035285 DOI: 10.1038/s41467-020-14614-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Accepted: 01/21/2020] [Indexed: 02/07/2023] Open
Abstract
The MEN1 gene, a tumor suppressor gene that encodes the protein menin, is mutated at high frequencies in neuroendocrine (NE) tumors; however, the biological importance of this gene in NE-type lung cancer in vivo remains unclear. Here, we established an ATII-specific KrasG12D/+/Men1-/- driven genetically engineered mouse model and show that deficiency of menin results in the accumulation of DNA damage and antagonizes oncogenic Kras-induced senescence and the epithelial-to-mesenchymal transition during lung tumorigenesis. The loss of menin expression in certain human primary lung cancers correlates with elevated NE profiles and reduced overall survival.
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Affiliation(s)
- Huan Qiu
- Department of Basic Medical Sciences, School of Medicine, Xiamen University, Xiamen, 361102, Fujian Province, People's Republic of China
| | - Bang-Ming Jin
- Department of Basic Medical Sciences, School of Medicine, Xiamen University, Xiamen, 361102, Fujian Province, People's Republic of China
| | - Zhan-Feng Wang
- Department of Neurosurgery, China-Japan Union Hospital of Jilin University, Changchun, 130033, People's Republic of China
| | - Bin Xu
- Department of Basic Medical Sciences, School of Medicine, Xiamen University, Xiamen, 361102, Fujian Province, People's Republic of China
| | - Qi-Fan Zheng
- Department of Basic Medical Sciences, School of Medicine, Xiamen University, Xiamen, 361102, Fujian Province, People's Republic of China
| | - Li Zhang
- Department of Basic Medical Sciences, School of Medicine, Xiamen University, Xiamen, 361102, Fujian Province, People's Republic of China
| | - Ling-Yu Zhu
- Department of Basic Medical Sciences, School of Medicine, Xiamen University, Xiamen, 361102, Fujian Province, People's Republic of China
| | - Shuang Shi
- Department of Basic Medical Sciences, School of Medicine, Xiamen University, Xiamen, 361102, Fujian Province, People's Republic of China
| | - Jun-Bo Yuan
- Department of Basic Medical Sciences, School of Medicine, Xiamen University, Xiamen, 361102, Fujian Province, People's Republic of China
| | - Xiao Lin
- Department of Basic Medical Sciences, School of Medicine, Xiamen University, Xiamen, 361102, Fujian Province, People's Republic of China
| | - Shu-Bin Gao
- Department of Basic Medical Sciences, School of Medicine, Xiamen University, Xiamen, 361102, Fujian Province, People's Republic of China
| | - Guang-Hui Jin
- Department of Basic Medical Sciences, School of Medicine, Xiamen University, Xiamen, 361102, Fujian Province, People's Republic of China. .,State Key Laboratory of Cellular Stress Biology, Xiamen University, Xiamen, 361102, Fujian Province, People's Republic of China. .,Cancer Research Center, Xiamen University, Xiamen, 361102, Fujian Province, People's Republic of China.
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5
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Xie J, Xin WH, Han RN, Jin GH, Sun YX. [Neck gout stone: a case report]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019; 54:697-699. [PMID: 31550765 DOI: 10.3760/cma.j.issn.1673-0860.2019.09.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- J Xie
- Department of Otorhinolaryngology Head and Neck Surgery, China-Japan Union Hospital, Jilin University, Changchun 130031, China
| | - W H Xin
- Department of Otorhinolaryngology Head and Neck Surgery, China-Japan Union Hospital, Jilin University, Changchun 130031, China
| | - R N Han
- Department of Otorhinolaryngology Head and Neck Surgery, China-Japan Union Hospital, Jilin University, Changchun 130031, China
| | - G H Jin
- Department of Otorhinolaryngology Head and Neck Surgery, China-Japan Union Hospital, Jilin University, Changchun 130031, China
| | - Y X Sun
- Department of Otorhinolaryngology Head and Neck Surgery, China-Japan Union Hospital, Jilin University, Changchun 130031, China
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Wu KC, Chen XJ, Jin GH, Wang XY, Yang DD, Li YP, Xiang L, Zhang BW, Zhou GH, Zhang CJ, Jin ZB. Deletion of miR-182 Leads to Retinal Dysfunction in Mice. Invest Ophthalmol Vis Sci 2019; 60:1265-1274. [PMID: 30924851 DOI: 10.1167/iovs.18-24166] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose MicroRNA-182 (miR-182) is abundantly expressed in mammalian retinas; however, the association between miR-182 and retinal function remains unclear. In this study, we explored whether miR-182 contributes to functional decline in retinas using a miR-182 depleted mouse. Methods Electroretinogram (ERG) amplitudes at different ages were measured in miR-182 knockout (KO) mice. The thickness and lamination of retinas were assessed using a color fundus camera and high-resolution optical coherence tomography. Expression levels of key photoreceptor-specific genes and the miR-183/96/182 cluster (miR-183C) were quantified using quantitative real-time PCR. RNA sequencing and light-induced damage were carried out to observe the changes in the retinal transcriptome and sensitivity to light damage in the miR-182 KO mice. Results The ERG recording reveals that the ERG response amplitude decreased both at early and later ages when compared with control littermates. The expression of some key photoreceptor-specific genes was down-regulated with deletion of miR-182 in retina. RNA sequencing indicated that some biological processes of visual system were affected, and the numbers of potential target genes of miR-182 were presented in the mouse retina using bioinformatics analysis. The miR-182 KO mice were characterized by progressively losing the outer segment after being treated with light-damage exposure. The thickness and lamination of retina as well as compensatory expression of miR-183C showed no apparent changes in retina of miR-182 KO mice under normal laboratory lighting condition. Conclusions Our findings provided new insights into the relationship between the miR-182 and retinal development and revealed that miR-182 may play a critical role in maintaining retinal function.
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Affiliation(s)
- Kun-Chao Wu
- Lab for Stem Cell & Retinal Regeneration, Institute of Stem Cell Research, State Key Laboratory of Ophthalmology, Optometry and Vision Science, National Center for International Research in Regenerative Medicine and Neurogenetics, Wenzhou Medical University, Wenzhou, China.,Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Xue-Jiao Chen
- Lab for Stem Cell & Retinal Regeneration, Institute of Stem Cell Research, State Key Laboratory of Ophthalmology, Optometry and Vision Science, National Center for International Research in Regenerative Medicine and Neurogenetics, Wenzhou Medical University, Wenzhou, China.,Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Guang-Hui Jin
- Lab for Stem Cell & Retinal Regeneration, Institute of Stem Cell Research, State Key Laboratory of Ophthalmology, Optometry and Vision Science, National Center for International Research in Regenerative Medicine and Neurogenetics, Wenzhou Medical University, Wenzhou, China.,Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Xiao-Yun Wang
- Lab for Stem Cell & Retinal Regeneration, Institute of Stem Cell Research, State Key Laboratory of Ophthalmology, Optometry and Vision Science, National Center for International Research in Regenerative Medicine and Neurogenetics, Wenzhou Medical University, Wenzhou, China.,Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Dan-Dan Yang
- Lab for Stem Cell & Retinal Regeneration, Institute of Stem Cell Research, State Key Laboratory of Ophthalmology, Optometry and Vision Science, National Center for International Research in Regenerative Medicine and Neurogenetics, Wenzhou Medical University, Wenzhou, China.,Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Yan-Ping Li
- Lab for Stem Cell & Retinal Regeneration, Institute of Stem Cell Research, State Key Laboratory of Ophthalmology, Optometry and Vision Science, National Center for International Research in Regenerative Medicine and Neurogenetics, Wenzhou Medical University, Wenzhou, China.,Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Lue Xiang
- Lab for Stem Cell & Retinal Regeneration, Institute of Stem Cell Research, State Key Laboratory of Ophthalmology, Optometry and Vision Science, National Center for International Research in Regenerative Medicine and Neurogenetics, Wenzhou Medical University, Wenzhou, China.,Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Bo-Wen Zhang
- Lab for Stem Cell & Retinal Regeneration, Institute of Stem Cell Research, State Key Laboratory of Ophthalmology, Optometry and Vision Science, National Center for International Research in Regenerative Medicine and Neurogenetics, Wenzhou Medical University, Wenzhou, China.,Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Gao-Hui Zhou
- Lab for Stem Cell & Retinal Regeneration, Institute of Stem Cell Research, State Key Laboratory of Ophthalmology, Optometry and Vision Science, National Center for International Research in Regenerative Medicine and Neurogenetics, Wenzhou Medical University, Wenzhou, China.,Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Chang-Jun Zhang
- Lab for Stem Cell & Retinal Regeneration, Institute of Stem Cell Research, State Key Laboratory of Ophthalmology, Optometry and Vision Science, National Center for International Research in Regenerative Medicine and Neurogenetics, Wenzhou Medical University, Wenzhou, China.,Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Zi-Bing Jin
- Lab for Stem Cell & Retinal Regeneration, Institute of Stem Cell Research, State Key Laboratory of Ophthalmology, Optometry and Vision Science, National Center for International Research in Regenerative Medicine and Neurogenetics, Wenzhou Medical University, Wenzhou, China.,Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China
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Cai XB, Wu KC, Zhang X, Lv JN, Jin GH, Xiang L, Chen J, Huang XF, Pan D, Lu B, Lu F, Qu J, Jin ZB. Whole-exome sequencing identified ARL2 as a novel candidate gene for MRCS (microcornea, rod-cone dystrophy, cataract, and posterior staphyloma) syndrome. Clin Genet 2019; 96:61-71. [PMID: 30945270 DOI: 10.1111/cge.13541] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 11/19/2018] [Revised: 03/20/2019] [Accepted: 03/21/2019] [Indexed: 01/01/2023]
Abstract
Adenosine diphosphate (ADP)-ribosylation factor-like 2 (ARL2) protein participates in a broad range of cellular processes and acts as a mediator for mutant ARL2BP in cilium-associated retinitis pigmentosa and for mutant HRG4 in mitochondria-related photoreceptor degeneration. However, mutant ARL2 has not been linked to any human disease so far. Here, we identified a de novo variant in ARL2 (c.44G > T, p.R15L) in a Chinese pedigree with MRCS (microcornea, rod-cone dystrophy, cataract, and posterior staphyloma) syndrome through whole-exome sequencing and co-segregation analysis. Co-immunoprecipitation assay and immunoblotting confirmed that the mutant ARL2 protein showed a 62% lower binding affinity for HRG4 while a merely 18% lower binding affinity for ARL2BP. Immunofluorescence images of ARL2 and HRG4 co-localizing with cytochrome c in HeLa cells described their relationship with mitochondria. Further analyses of the mitochondrial respiratory chain and adenosine triphosphate production showed significant abnormalities under an ARL2-mutant condition. Finally, we generated transgenic mice to test the pathogenicity of this variant and observed retinal degeneration complicated with microcornea and cataract that were similar to those in our patients. In conclusion, we uncover ARL2 as a novel candidate gene for MRCS syndrome and suggest a mitochondria-related mechanism of the first ARL2 variant through site-directed mutagenesis studies.
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Affiliation(s)
- Xue-Bi Cai
- Lab for Stem Cell and Retinal Regeneration, Institute of Stem Cell Research; Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China.,State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, China
| | - Kun-Chao Wu
- Lab for Stem Cell and Retinal Regeneration, Institute of Stem Cell Research; Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China.,State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, China
| | - Xiao Zhang
- Lab for Stem Cell and Retinal Regeneration, Institute of Stem Cell Research; Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China.,State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, China
| | - Ji-Neng Lv
- Lab for Stem Cell and Retinal Regeneration, Institute of Stem Cell Research; Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China.,State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, China
| | - Guang-Hui Jin
- Lab for Stem Cell and Retinal Regeneration, Institute of Stem Cell Research; Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China.,State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, China
| | - Lue Xiang
- Lab for Stem Cell and Retinal Regeneration, Institute of Stem Cell Research; Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China.,State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, China
| | - Jie Chen
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, China
| | - Xiu-Feng Huang
- Lab for Stem Cell and Retinal Regeneration, Institute of Stem Cell Research; Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China.,State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, China
| | - Deng Pan
- Lab for Stem Cell and Retinal Regeneration, Institute of Stem Cell Research; Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China.,State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, China
| | - Bin Lu
- Protein Quality Control and Diseases Laboratory, Institute of Biophysics, School of Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Fan Lu
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, China
| | - Jia Qu
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, China
| | - Zi-Bing Jin
- Lab for Stem Cell and Retinal Regeneration, Institute of Stem Cell Research; Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China.,State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, China
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8
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Zheng QF, Xu B, Wang HM, Ding LH, Liu JY, Zhu LY, Qiu H, Zhang L, Ni GY, Ye J, Gao SB, Jin GH. Epigenetic alterations contribute to promoter activity of imprinting gene IGF2. Biochim Biophys Acta Gene Regul Mech 2018; 1861:117-124. [PMID: 29413895 DOI: 10.1016/j.bbagrm.2017.12.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Revised: 12/20/2017] [Accepted: 12/20/2017] [Indexed: 01/21/2023]
Abstract
The expression of insulin-like growth factor 2 (IGF2), a classical imprinting gene, didn't completely correlate with its imprinting profiles in hepatocellular carcinoma (HCC). The mechanistic importance of promoter activity in regulation of IGF2 has not been fully clarified. Here we show that histone 3 lysine 4 trimethylation (H3K4me3) modified by menin-MLL complex of IGF2 promoter contributes to promoter activity of IGF2. The strong binding of menin and abundant H3K4me3 at the DNA demethylated P3/4 promoters were observed in Hep3B cells with the robust expression of IGF2. In IGF2-low-expressing HepG2 cells, menin didn't bind to DNA hypermethylated P3/4 regions; however, menin overexpression inhibited DNA methylation and promoted H3K4me3 at the P3/4 as well as IGF2 expression in HepG2. In addition, the H3K4me3 at P3/4 locus was activated in primary HCC specimens with high IGF2 expression. Furthermore, inhibition of the menin/MLL interaction via MI-2/3 reduced IGF2 expression, inhibited the IGF1R-AKT pathway, and significantly repressed HCC with robust expression of IGF2. Taken together, we conclude that H3K4me3 of P3/4 locus mediated by the menin-MLL complex is a novel epigenetic mechanism for releasing IGF2.
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Affiliation(s)
- Qi-Fan Zheng
- Department of Basic Medical Sciences, Medical College, Xiamen University, Chengzhi building 110, Xiang'an South Road, Xiamen 361102, PR China; Fujian Provincial Key Laboratory of chronic liver disease and hepatocellular carcinoma, Xiamen University, Chengzhi building 110, Xiang'an South Road, Xiamen 361102, PR China
| | - Bin Xu
- Department of Basic Medical Sciences, Medical College, Xiamen University, Chengzhi building 110, Xiang'an South Road, Xiamen 361102, PR China; Fujian Provincial Key Laboratory of chronic liver disease and hepatocellular carcinoma, Xiamen University, Chengzhi building 110, Xiang'an South Road, Xiamen 361102, PR China.
| | - Hui-Min Wang
- Department of Basic Medical Sciences, Medical College, Xiamen University, Chengzhi building 110, Xiang'an South Road, Xiamen 361102, PR China
| | - Li-Hong Ding
- Department of Basic Medical Sciences, Medical College, Xiamen University, Chengzhi building 110, Xiang'an South Road, Xiamen 361102, PR China
| | - Jin-Yang Liu
- Department of Basic Medical Sciences, Medical College, Xiamen University, Chengzhi building 110, Xiang'an South Road, Xiamen 361102, PR China
| | - Ling-Yu Zhu
- Department of Basic Medical Sciences, Medical College, Xiamen University, Chengzhi building 110, Xiang'an South Road, Xiamen 361102, PR China
| | - Huan Qiu
- Department of Basic Medical Sciences, Medical College, Xiamen University, Chengzhi building 110, Xiang'an South Road, Xiamen 361102, PR China
| | - Li Zhang
- Department of Basic Medical Sciences, Medical College, Xiamen University, Chengzhi building 110, Xiang'an South Road, Xiamen 361102, PR China; Fujian Provincial Key Laboratory of chronic liver disease and hepatocellular carcinoma, Xiamen University, Chengzhi building 110, Xiang'an South Road, Xiamen 361102, PR China
| | - Guang-Yi Ni
- Department of Basic Medical Sciences, Medical College, Xiamen University, Chengzhi building 110, Xiang'an South Road, Xiamen 361102, PR China; Fujian Provincial Key Laboratory of chronic liver disease and hepatocellular carcinoma, Xiamen University, Chengzhi building 110, Xiang'an South Road, Xiamen 361102, PR China
| | - Jing Ye
- Department of Basic Medical Sciences, Medical College, Xiamen University, Chengzhi building 110, Xiang'an South Road, Xiamen 361102, PR China
| | - Shu-Bin Gao
- Department of Basic Medical Sciences, Medical College, Xiamen University, Chengzhi building 110, Xiang'an South Road, Xiamen 361102, PR China; Fujian Provincial Key Laboratory of chronic liver disease and hepatocellular carcinoma, Xiamen University, Chengzhi building 110, Xiang'an South Road, Xiamen 361102, PR China
| | - Guang-Hui Jin
- Department of Basic Medical Sciences, Medical College, Xiamen University, Chengzhi building 110, Xiang'an South Road, Xiamen 361102, PR China; Fujian Provincial Key Laboratory of chronic liver disease and hepatocellular carcinoma, Xiamen University, Chengzhi building 110, Xiang'an South Road, Xiamen 361102, PR China.
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9
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An LF, Wang XJ, Sun YX, Li L, Lin YQ, Zhu JJ, Jin GH, Shang TJ. [Diffuse hemorrhage in cervical mediastinum space hemorrhage: a case report]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 52:946-947. [PMID: 29262458 DOI: 10.3760/cma.j.issn.1673-0860.2017.12.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- L F An
- Deparement of Otorhinolaryngology Head and Neck Surgeryt, China-Japan Union Hospital of Jilin University, Changchun 130033, China
| | - X J Wang
- Department of Pathology, China-Japan Union Hospital of Jilin University, Changchun 130033, China
| | - Y X Sun
- Deparement of Otorhinolaryngology Head and Neck Surgeryt, China-Japan Union Hospital of Jilin University, Changchun 130033, China
| | - L Li
- Deparement of Otorhinolaryngology Head and Neck Surgeryt, China-Japan Union Hospital of Jilin University, Changchun 130033, China
| | - Y Q Lin
- Department of Ultrasonography, China-Japan Union Hospital of Jilin University, Changchun 130033, China
| | - J J Zhu
- Department of Radiology, China-Japan Union Hospital of Jilin University, Changchun 130033, China
| | - G H Jin
- Deparement of Otorhinolaryngology Head and Neck Surgeryt, China-Japan Union Hospital of Jilin University, Changchun 130033, China
| | - T J Shang
- Deparement of Otorhinolaryngology Head and Neck Surgeryt, China-Japan Union Hospital of Jilin University, Changchun 130033, China
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Du J, Shao S, Jin GH, Qian CG, Xu W, Lu XQ. Factors associated with health-related quality of life among family caregivers of disabled older adults: a cross-sectional study from Beijing. Medicine (Baltimore) 2017; 96:e8489. [PMID: 29095308 PMCID: PMC5682827 DOI: 10.1097/md.0000000000008489] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Because of the aging population and the shortage of standardized institutional solutions for long-term care (LTC) in China, family caregivers in Beijing are increasingly called upon to provide home care for disabled older adults. Caregivers face a heavy care burden, and decreased physical and mental health (MH). This study aims to describe health-related quality of life (HRQoL) and to identify its predictors for Chinese family caregivers of disabled older adults.A total of 766 caregivers were recruited from 5 communities in the Dongcheng District of Beijing. Measures included the 36-item Short-Form Health Survey (SF-36), the Zarit Caregiver Burden Interview (ZBI) scales, and the Chinese Social Support Rating Scale (SSRS). Hierarchical multiple regression (HMR) analysis was used to identify the predictors.HMR analysis showed that each block of independent variables (demographic characteristics of disabled older adults, demographic characteristics of caregivers, caregiving context, and subjective caregiver burden) had contributed significantly to caregivers' physical and mental quality of life. Subjective caregiver burden explained the greatest amount of total variance in all MH subscales and the 2nd greatest amount of variance in most physical subscales. Therefore, subjective caregiver burden was the strongest predictor of HRQoL.Our findings suggest that a decrease in caregiver burden can improve caregivers' HRQoL, and additional social support is important in decreasing the impact of caregiving on HRQoL. Importantly, an LTC system should be established in China as soon as possible.
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Affiliation(s)
- Juan Du
- School of General Practice and Continuing Education, Capital Medical University
| | - Shuang Shao
- School of General Practice and Continuing Education, Capital Medical University
| | - Guang-Hui Jin
- School of General Practice and Continuing Education, Capital Medical University
| | | | - Wei Xu
- Hepingli Community Health Service Station, Dongcheng District, Beijing, China
| | - Xiao-Qin Lu
- School of General Practice and Continuing Education, Capital Medical University
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11
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Liu JM, Zhu DD, Jin GH, Zhu XW, Li L, Liu GW, Cheng KL, Li YQ. [Measurement of morphological parameters of internal acousticmeatus using thin-section CT]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 52:698-701. [PMID: 28910896 DOI: 10.3760/cma.j.issn.1673-0860.2017.09.012] [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] [Indexed: 11/05/2022]
Abstract
Objective: This study aimed to measure the morphological parameters of the internal acoustic meatus(IAM) and its adjacent structures using temporal-bone thin-section CT(computed tomography). Methods: CT images were obtained from 50 Chinese adult patients (25 males and 25 females, 100 sides) which had no visible lesion in the petrous part of the temporal bone and inner ear, the morphological parameters of all inner ear parts were sectionally measured on the specified plane using SPSS 22.0 software for statistical analysis. Results: The integral morphological characteristics of the IAM were observed. These results revealed that anterior-posterior diameter of the internal acoustic poer(IAP)(CD) was (6.93±1.85)mm, the superior-inferior diameter of the IAP(EF) was (4.40±0.86)mm, the length of the IAM(AB) was (9.30±1.60)mm, the superior-inferior diameter of the IAM(the intersection of inner 1/3 section and middle 1/3 section) was (4.13±0.83)mm, the superior-inferior diameter of the IAM(the intersection of middle 1/3 section and outer 1/3 section) was (4.61±1.02)mm, the anterior-posterior diameter of the IAM(the intersection of inner 1/3 section and middle 1/3 section) was (6.62±1.92)mm, the anterior-posterior diameter of the IAM(the intersection of middle 1/3 section and outer 1/3 section) was (6.28±1.65)mm, the depth of transverse crest (superior wall) was (3.10±0.75)mm, the depth of transverse crest (interior wall)the was (1.46±0.59)mm, the distance from transverse crest vertex A to the superior wall of the IAM was (2.05±0.42)mm, the distance from transverse crest vertex A to the interior wall of the IAM was (2.93±0.41)mm, the thickness of the superior bone wall of the IAM (the intersection of inner 1/3 section and middle 1/3 section) was (4.45±1.34)mm, the thickness of the superior bone wall of the IAM (the intersection of middle 1/3 section and outer 1/3 section) was (4.32±1.12)mm, the thickness of the superior bone wall of the IAM (the intersection of outer 1/3 section and transverse crest vertex) was (4.37±1.28)mm, and the appearance ratio of the cells in the whole IAM superior wall was 32%.The whole IAM assumed the shape of short cylinder, inclining about 1 cm outward, with the upper-lower diameter and anterior-posterior diameter about 5 mm. Conclusion: It is necessary for carrying out preoperative the temporal-bone thin-section CT to obtain the morphological parameters of the IAM, determine its basic morphology, and provide references to avoid damaging the other important structures during IAM surgeries.
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Affiliation(s)
- J M Liu
- Department of Otorhinolaryngology Head and Neck Surgery, China Japan Union Hospital of Jilin University, Changchun 130021, China
| | - D D Zhu
- Department of Otorhinolaryngology Head and Neck Surgery, China Japan Union Hospital of Jilin University, Changchun 130021, China
| | - G H Jin
- Department of Otorhinolaryngology Head and Neck Surgery, China Japan Union Hospital of Jilin University, Changchun 130021, China
| | - X W Zhu
- Department of Otorhinolaryngology Head and Neck Surgery, China Japan Union Hospital of Jilin University, Changchun 130021, China
| | - L Li
- Department of Otorhinolaryngology Head and Neck Surgery, China Japan Union Hospital of Jilin University, Changchun 130021, China
| | - G W Liu
- Department of Anatomy, College of Basic Medicine, Bethune Medicine Institute, Jilin University, Changchun 130021
| | - K L Cheng
- Department of Radiology, China Japan Union Hospital of Jilin University, Changchun 130021, China
| | - Y Q Li
- Department of Anatomy, College of Basic Medicine, Bethune Medicine Institute, Jilin University, Changchun 130021
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12
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Gao SB, Li KL, Qiu H, Zhu LY, Pan CB, Zhao Y, Wei SH, Shi S, Jin GH, Xue LX. Enhancing chemotherapy sensitivity by targeting PcG via the ATM/p53 pathway. Am J Cancer Res 2017; 7:1874-1883. [PMID: 28979810 PMCID: PMC5622222] [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: 03/29/2017] [Accepted: 04/07/2017] [Indexed: 06/07/2023] Open
Abstract
Histone modification and chromatin remodeling are important events in response to DNA damage, and Polycomb group (PcG) proteins, catalyzing H3K27 methylation, are involved. However, the biological function and mechanism of PcG in DNA damage are not fully understood. Additionally, downstream effectors in hepatocellular carcinoma (HCC) remain unclear. The present study investigated the biological and mechanistic roles of PcG in the DNA damage response induced by chemotherapeutic drugs in HCC. It was found that chemotherapy drugs, such as epirubicin (EPB) and mitomycin C (MMC), effectively blocked expression of PcG in p53-wild-type HepG2 cells but not in PLC/PRF5 and Hep3B cells with p53 mutation or deletion. PcG-related target genes involved in DNA damage were identified, including p53, Ataxia telangiectasia mutated (ATM) and Forkhead box O3 (FOXO3). Moreover, targeting PcG-induced p53 expression was associated with increased drug sensitivity in HCC cells. shRNA targeting enhancer of zeste homolog 2 (EZH2) or its inhibitor GSK126 significantly promoted chemotherapeutic drug-induced genotoxicity and increased HepG2 cell chemosensitivity. Mechanistically, chromatin immunoprecipitation (ChIP) assays confirmed that PcG binds to the ATM promoter and inhibits its expression through covalent modification of H3K27me3. Herein, we establish a potential chemotherapy association with GSK126, and the findings suggest this link might represent a new strategy for increasing the sensitivity of HCC to chemotherapeutic agents.
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Affiliation(s)
- Shu-Bin Gao
- Department of Basic Medical Sciences, Medical College, Xiamen UniversityChengzhi Building 110, Xiang’an South Road, Xiamen P.R. China
- Fujian Provincial Key Laboratory of Chronic Liver Disease and Hepatocellular Carcinoma, Xiamen UniversityChengzhi Building 110, Xiang’an South Road, Xiamen P.R. China
| | - Kang-Li Li
- Department of Basic Medical Sciences, Medical College, Xiamen UniversityChengzhi Building 110, Xiang’an South Road, Xiamen P.R. China
| | - Huan Qiu
- Department of Basic Medical Sciences, Medical College, Xiamen UniversityChengzhi Building 110, Xiang’an South Road, Xiamen P.R. China
| | - Ling-Yu Zhu
- Department of Basic Medical Sciences, Medical College, Xiamen UniversityChengzhi Building 110, Xiang’an South Road, Xiamen P.R. China
| | - Chang-Bao Pan
- Department of Basic Medical Sciences, Medical College, Xiamen UniversityChengzhi Building 110, Xiang’an South Road, Xiamen P.R. China
| | - Yue Zhao
- Department of Basic Medical Sciences, Medical College, Xiamen UniversityChengzhi Building 110, Xiang’an South Road, Xiamen P.R. China
| | - Shu-Hua Wei
- Medical Research Center, Department of Radiation Oncology, Peking University Third Hospital49 Huayuan North Road, Beijing 100191, P.R. China
| | - Shu Shi
- Department of Microbiology, Peking University Health Science Center38 Xue Yuan Road, Beijing 100191, P.R. China
| | - Guang-Hui Jin
- Department of Basic Medical Sciences, Medical College, Xiamen UniversityChengzhi Building 110, Xiang’an South Road, Xiamen P.R. China
- Fujian Provincial Key Laboratory of Chronic Liver Disease and Hepatocellular Carcinoma, Xiamen UniversityChengzhi Building 110, Xiang’an South Road, Xiamen P.R. China
| | - Li-Xiang Xue
- Medical Research Center, Department of Radiation Oncology, Peking University Third Hospital49 Huayuan North Road, Beijing 100191, P.R. China
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Sha JC, Zhang C, Meng CD, Zhu DD, An LF, Zheng J, Jin GH, Lang JQ. [Imaging-navigated endoscopic surgery in acute pediatric sinusitis with orbital subperiosteal abscess: two cases report]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 31:1199-1202. [PMID: 29798358 DOI: 10.13201/j.issn.1001-1781.2017.15.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Indexed: 11/12/2022]
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14
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Li L, Jin GH, Lang JQ, Cui N. [An association between obstructive sleep apnea hypopnea syndrome and deep vein thrombosis and pulmonary embolism]. Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 31:1214-1217. [PMID: 29798363 DOI: 10.13201/j.issn.1001-1781.2017.15.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Indexed: 06/08/2023]
Abstract
OSAHS is a kind of the sleep-related breathing disorder, with lack of oxygen. OSAHS can induce many kinds of cardiovascular system diseases. Deep vein thrombosis and pulmonary embolism (deep vein thrombosis and/or pulmonary embolism, DVT and PE) is caused by deep vein thrombosis embolism pulmonary artery trunk or branch pulmonary disorder, potentially lethal diseases of the cardiovascular system. In recent years, researchers have found that OSAHS may have something to do with DVT-PE. So in this review, the relationship was summarized between OSAHS and DVT-PE in epidemiology, pathophysiology, assessment and treatment measures.
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Gao SB, Sun SL, Zheng QL, Zhang L, Zhu Y, Jin GH, Xue LX. Genetic alteration and misexpression of Polycomb group genes in hepatocellular carcinoma. Am J Cancer Res 2015; 5:2969-2979. [PMID: 26693053 PMCID: PMC4656724] [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: 04/16/2015] [Accepted: 06/25/2015] [Indexed: 06/05/2023] Open
Abstract
Although the abnormal expression of Polycomb-group (PcG) proteins is closely associated with carcinogenesis and the clinicopathological features of hepatocellular carcinoma (HCC), the genetic mutation profile of PcG genes has not been well established. In this study of human HCC specimens, we firstly discovered a highly conserved mutation site, G553C, in the Polycomb Repressive Complex 2 (PRC2) gene enhancer of zeste homolog 2 (EZH2). This site also harbors a single nucleotide polymorphism (SNP), rs2302427, which plays an important antagonistic role in HCC. Kaplan-Meier survival curves showed that the tumor-free and overall survival of patients with EZH2 G553C were superior to those without the mutation. The G allele frequencies in patients and healthy subjects were 0.2% and 0.122%, respectively, with significant differences in distribution. The individuals carrying the GG and the GC genotypes at rs2302427 showed 3.083-fold and 1.827-fold higher risks of HCC, respectively, compared with individuals carrying the wild-type allele. Furthermore, Immunohistochemical staining revealed that the expression levels of CBX8 (in 53/123 samples) and BMI1 (in 60/130 samples) were markedly increased in human HCC specimens. Importantly, the overall and tumor-free survival rates were significantly reduced in the group of patients who simultaneously expressed PRC1 and PRC2. These results argue that a combination of PRC1 and PRC2 expression has a significant predictive/prognostic value for HCC patients. Taken together, our results indicate the abnormal expression and genetic mutation of PcG members are two independent events; cumulative genetic and epigenetic alterations act synergistically in liver carcinogenesis.
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Affiliation(s)
- Shu-Bin Gao
- Department of Basic Medical Sciences, Medical CollegeXiamen 361102, P.R. China
- Fujian Provincial Key Laboratory of Chronic Liver Disease and Hepatocellular Carcinoma, Xiamen UniversityChengzhi Building 110, Xiang’an South Road, Xiamen 361102, P.R. China
| | - Shi-Long Sun
- Ministry of Health Key Laboratory of Radiobiology, Jilin University1163 Xinmin Road, Changchun 130021, P.R. China
| | - Qi-Lin Zheng
- Department of Basic Medical Sciences, Medical CollegeXiamen 361102, P.R. China
| | - Li Zhang
- Department of Basic Medical Sciences, Medical CollegeXiamen 361102, P.R. China
- Fujian Provincial Key Laboratory of Chronic Liver Disease and Hepatocellular Carcinoma, Xiamen UniversityChengzhi Building 110, Xiang’an South Road, Xiamen 361102, P.R. China
| | - Yuequan Zhu
- Medical Research Center, Department of Radiation Oncology, Peking University Third HospitalBeijing 100191, P.R. China
| | - Guang-Hui Jin
- Department of Basic Medical Sciences, Medical CollegeXiamen 361102, P.R. China
- Fujian Provincial Key Laboratory of Chronic Liver Disease and Hepatocellular Carcinoma, Xiamen UniversityChengzhi Building 110, Xiang’an South Road, Xiamen 361102, P.R. China
| | - Li-Xiang Xue
- Medical Research Center, Department of Radiation Oncology, Peking University Third HospitalBeijing 100191, P.R. China
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16
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Gao SB, Xu B, Ding LH, Zheng QL, Zhang L, Zheng QF, Li SH, Feng ZJ, Wei J, Yin ZY, Hua X, Jin GH. The functional and mechanistic relatedness of EZH2 and menin in hepatocellular carcinoma. J Hepatol 2014; 61:832-9. [PMID: 24845612 DOI: 10.1016/j.jhep.2014.05.015] [Citation(s) in RCA: 40] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Revised: 04/29/2014] [Accepted: 05/06/2014] [Indexed: 12/17/2022]
Abstract
BACKGROUND & AIMS The alterations of histone modification may serve as a promising diagnostic biomarker of hepatocellular carcinoma (HCC), but the clinical and mechanistic relatedness of the histone H3 lysine 27 and 4 trimethylation (H3K27me3 and H3K4me3) in HCC remains poorly understood. Here we propose that the combination of H3K27me3 and H3K4me3 is a more precise predictive/prognostic value for outcome of HCC patients. METHODS We used chromatin immunoprecipitation (ChIP) assays and a ChIP-on-chip screen to analyse HCC. RESULTS We found that the EZH2 occupancy coincides with the H3K27me3 at promoters and directly silences the transcription of target genes in HCC. The H3K27me3-related gene network of EZH2 contains well-established genes, such as CDKN2A, as well as previously unappreciated genes, including FOXO3, E2F1, and NOTCH2, among others. We further observed independently increasing profiles of H3K27me3 and H3K4me3 at the promoters of certain target genes in HCC specimens. Importantly, Kaplan-Meier analysis reveals that 3-year overall and tumour-free survival rates are dramatically reduced in patients that simultaneously express EZH2 and menin, compared to rates in the EZH2 or menin under expressing patients. Furthermore, an inhibitor of H3K27me3 alone, or in combination with an H3K4me3 inhibitor, effectively blocked the aggressive phenotype of HCC cells. CONCLUSIONS Our results indicate that a combined analysis of both H3K27me3 and H3K4me3 may serve as powerful diagnostic biomarkers of HCC, and targeting both might benefit anti-HCC therapy.
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Affiliation(s)
- Shu-Bin Gao
- Department of Basic Medical Sciences, Medical College, Xiamen University, Chengzhi Building 110, Xiang'an South Road, Xiamen 361102, PR China; Fujian Provincial Key Laboratory of Chronic Liver Disease and Hepatocellular Carcinoma, Xiamen University, Chengzhi Building 110, Xiang'an South Road, Xiamen 361102, PR China; State Key Laboratory of Cellular Stress Biology, Xiamen University, Chengzhi Building 110, Xiang'an South Road, Xiamen 361102, PR China
| | - Bin Xu
- Department of Basic Medical Sciences, Medical College, Xiamen University, Chengzhi Building 110, Xiang'an South Road, Xiamen 361102, PR China; Fujian Provincial Key Laboratory of Chronic Liver Disease and Hepatocellular Carcinoma, Xiamen University, Chengzhi Building 110, Xiang'an South Road, Xiamen 361102, PR China
| | - Li-Hong Ding
- Department of Basic Medical Sciences, Medical College, Xiamen University, Chengzhi Building 110, Xiang'an South Road, Xiamen 361102, PR China
| | - Qi-Lin Zheng
- Department of Basic Medical Sciences, Medical College, Xiamen University, Chengzhi Building 110, Xiang'an South Road, Xiamen 361102, PR China
| | - Li Zhang
- Department of Basic Medical Sciences, Medical College, Xiamen University, Chengzhi Building 110, Xiang'an South Road, Xiamen 361102, PR China; Fujian Provincial Key Laboratory of Chronic Liver Disease and Hepatocellular Carcinoma, Xiamen University, Chengzhi Building 110, Xiang'an South Road, Xiamen 361102, PR China
| | - Qi-Fan Zheng
- Department of Basic Medical Sciences, Medical College, Xiamen University, Chengzhi Building 110, Xiang'an South Road, Xiamen 361102, PR China; Fujian Provincial Key Laboratory of Chronic Liver Disease and Hepatocellular Carcinoma, Xiamen University, Chengzhi Building 110, Xiang'an South Road, Xiamen 361102, PR China; State Key Laboratory of Cellular Stress Biology, Xiamen University, Chengzhi Building 110, Xiang'an South Road, Xiamen 361102, PR China
| | - Shan-Hua Li
- Department of Basic Medical Sciences, Medical College, Xiamen University, Chengzhi Building 110, Xiang'an South Road, Xiamen 361102, PR China; Fujian Provincial Key Laboratory of Chronic Liver Disease and Hepatocellular Carcinoma, Xiamen University, Chengzhi Building 110, Xiang'an South Road, Xiamen 361102, PR China
| | - Zi-Jie Feng
- Department of Basic Medical Sciences, Medical College, Xiamen University, Chengzhi Building 110, Xiang'an South Road, Xiamen 361102, PR China
| | - Jie Wei
- Department of Basic Medical Sciences, Medical College, Xiamen University, Chengzhi Building 110, Xiang'an South Road, Xiamen 361102, PR China; Fujian Provincial Key Laboratory of Chronic Liver Disease and Hepatocellular Carcinoma, Xiamen University, Chengzhi Building 110, Xiang'an South Road, Xiamen 361102, PR China
| | - Zhen-Yu Yin
- Fujian Provincial Key Laboratory of Chronic Liver Disease and Hepatocellular Carcinoma, Xiamen University, Chengzhi Building 110, Xiang'an South Road, Xiamen 361102, PR China; Department of Hepatobiliary Surgery, Affiliated Zhongshan Hospital of Xiamen University, Hubin South Road 201-209, 361004, PR China
| | - Xianxin Hua
- Department of Cancer Biology, University of Pennsylvania, BRBII/III, Room 412, 421 Curie Blvd, Philadelphia, PA 19096, USA
| | - Guang-Hui Jin
- Department of Basic Medical Sciences, Medical College, Xiamen University, Chengzhi Building 110, Xiang'an South Road, Xiamen 361102, PR China; Fujian Provincial Key Laboratory of Chronic Liver Disease and Hepatocellular Carcinoma, Xiamen University, Chengzhi Building 110, Xiang'an South Road, Xiamen 361102, PR China; State Key Laboratory of Cellular Stress Biology, Xiamen University, Chengzhi Building 110, Xiang'an South Road, Xiamen 361102, PR China.
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Gao SB, Zheng QF, Xu B, Pan CB, Li KL, Zhao Y, Zheng QL, Lin X, Xue LX, Jin GH. EZH2 Represses Target Genes through H3K27-Dependent and H3K27-Independent Mechanisms in Hepatocellular Carcinoma. Mol Cancer Res 2014; 12:1388-97. [DOI: 10.1158/1541-7786.mcr-14-0034] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Jin GH, Choi GR, Park HH, Lee TS, Lee SB. Defining gross tumor volume using positron emission tomography/computed tomography phantom studies. Annu Int Conf IEEE Eng Med Biol Soc 2013; 2013:2473-6. [PMID: 24110228 DOI: 10.1109/embc.2013.6610041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Tumor volume and standard uptake value (SUV) calculated from positron emission tomography/computed tomography (PET/CT) images differ from their real values. Besides errors introduced by scintillation materials, photomultiplier tubes, and image reconstruction algorithms, measurements are affected by patients' prostheses, body movements, and body shape. To address these problems, we calculated tumor volume and SUV using the standard phantom (PET Phantom-NEMA IEC/2001) and obtained calibration constants. We found that while tumor volume increases with increasing SUV and tumor diameter, it also increases with increasing SUV and decreasing tumor diameter. Conversely, tumor volume decreases with decreasing SUV and tumor diameter and with decreasing SUV and increasing diameter. These results suggest that a correction factor should be applied to SUV and tumor volume obtained from PET/CT images.
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Feng ZJ, Gurung B, Jin GH, Yang XL, Hua XX. SUMO modification of menin. Am J Cancer Res 2013; 3:96-106. [PMID: 23359867 PMCID: PMC3555195] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2012] [Accepted: 12/27/2012] [Indexed: 06/01/2023] Open
Abstract
Menin acts as contextual a tumor suppressor and a tumor promoter, partly via epigenetic regulation of gene transcription. While menin is phosphorylated, it remains unclear whether wild type menin has other post-translational modifications. Here, we report that menin is SUMOylated by SUMO1 in vivo and in vitro, and the SUMOylation is reduced by a SUMO protease. Lysine 591 of menin was covalently modified by SUMO1 and K591R mutation in menin blocked SUMOylation of the C-terminal part of menin in transfected cells. Full-length menin with K591 mutation was still SUMOylated in vivo, suggesting the existence of multiple SUMOylation sites. Menin K591R mutant or menin-SUMO fusion protein still retains the ability to regulate cell proliferation and the expression of the examined menin target genes.
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Affiliation(s)
- Zi-Jie Feng
- Department of Basic Medical Sciences, Medical College, Xiamen University Xiamen, Fujian, China 361005 ; Abramson Family Cancer Research Institute, Department of Cancer Biology, Abramson Cancer Center, University of Pennsylvania Perelman School of Medicine 421 Curie Blvd., Philadelphia, PA 19104, USA
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Wu Y, Feng ZJ, Gao SB, Matkar S, Xu B, Duan HB, Lin X, Li SH, Hua X, Jin GH. Interplay between menin and K-Ras in regulating lung adenocarcinoma. J Biol Chem 2012; 287:40003-11. [PMID: 23027861 DOI: 10.1074/jbc.m112.382416] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
MEN1, which encodes the nuclear protein menin, acts as a tumor suppressor in lung cancer and is often inactivated in human primary lung adenocarcinoma. Here, we show that the inactivation of MEN1 is associated with increased DNA methylation at the MEN1 promoter by K-Ras. On one hand, the activated K-Ras up-regulates the expression of DNA methyltransferases and enhances the binding of DNA methyltransferase 1 to the MEN1 promoter, leading to increased DNA methylation at the MEN1 gene in lung cancer cells; on the other hand, menin reduces the level of active Ras-GTP at least partly by preventing GRB2 and SOS1 from binding to Ras, without affecting the expression of GRB2 and SOS1. In human lung adenocarcinoma samples, we further demonstrate that reduced menin expression is associated with the enhanced expression of Ras (p < 0.05). Finally, excision of the Men1 gene markedly accelerates the K-Ras(G12D)-induced tumor formation in the Men1(f/f);K-Ras(G12D/+);Cre ER mouse model. Together, these findings uncover a previously unknown link between activated K-Ras and menin, an important interplay governing tumor activation and suppression in the development of lung cancer.
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Affiliation(s)
- Yuan Wu
- Department of Basic Medical Sciences, Medical College, Zhongshan Hospital, Xiamen University, 361005 Fujian, China
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Abstract
Substantial genetic evidence suggests that chromosome 11q is involved in regulating initiation and progression of malignant melanomas. Mutations of the MEN1 gene, located in chromosome 11q13, predispose individuals to the multiple endocrine neoplasia type 1 (MEN1) familial syndrome. MEN1 patients develop primary malignant melanoma, suggesting a potential link between MEN1 syndrome and development of melanomas, but the precise molecular mechanism is poorly understood. Here we show that the MEN1 gene suppresses malignant phenotypes of melanoma cells through multiple signalling pathways. Ectopic expression of menin, the product of MEN1 gene, significantly inhibited melanoma cell proliferation and migration in vitro and in vivo. The inhibition was partly achieved through suppressing expression of growth factor pleiotrophin (PTN) and receptor protein tyrosine phosphatase (RPTP) β/ζ, accompanied with the reduced expression of phosphatidylinositol 3-kinase (pI3K) and decreased phosphorylation of focal adhesion kinase (FAK) and extracellular signal regulated kinase (ERK1/2). Interestingly, reduced expression of menin was associated with hypermethylation of the CpG islands of the MEN1 promoter in melanoma cells. Taken together, these findings suggest a previously unappreciated function for menin in suppressing malignant phenotypes of melanomas and unravel a novel mechanism involving in regulating PTN signalling by menin in development and progression of melanomas.
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Affiliation(s)
- Shu-Bin Gao
- Department of Basic Medical Sciences, Medical College, Xiamen University, Xiamen, Fujian, China
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Zhang XH, Zeng D, Zhang L, Zhu H, Jin GH, Xie Z, Chen X, Kang J, Zheng L. Low cytotoxicity porous Nd(2)(SiO(4))(3) nanoparticles with near infrared excitation and emission. Nanotechnology 2011; 22:185703. [PMID: 21427468 DOI: 10.1088/0957-4484/22/18/185703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Porous Nd(2)(SiO(4))(3) nanoparticles were successfully synthesized by a controlled route. This kind of silicate nanoparticle could be excited by near-infrared (NIR) radiation (808 nm) and triggered a NIR emission (1066 nm) at room temperature. By monitoring the 1066 nm emission, the long-lived luminescent lifetime was determined to be 19.5 µs. These NIR nanoparticles with appropriate diameters (<100 nm) were suitable for cell assays. MTT assays showed that the cytotoxicity of the porous Nd(2)(SiO(4))(3) nanoparticles was very low. Therefore, these porous silicate nanoparticles are potential biosafe high-performance NIR biolabeling materials.
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Affiliation(s)
- Xian-Hua Zhang
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China.
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23
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Xu B, Zeng DQ, Wu Y, Zheng R, Gu L, Lin X, Hua X, Jin GH. Tumor suppressor menin represses paired box gene 2 expression via Wilms tumor suppressor protein-polycomb group complex. J Biol Chem 2011; 286:13937-44. [PMID: 21378168 DOI: 10.1074/jbc.m110.197830] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Tumor suppressor menin, the product of the MEN1 gene, plays a key role in controlling histone 3 lysine 4 trimethylation (H3K4me3) and gene transcription, which can regulate proliferation, apoptosis, and differentiation. However, little is known as to whether menin controls gene expression and cell proliferation and survival via regulating Polycomb group (PcG) protein complex/H3K27me3. Here we show that menin specifically represses transcription factor Paired box gene 2 (Pax2) through PcG-mediated H3K27me3 and Wilms tumor suppressor protein (WT1), a zinc finger domain-containing DNA-binding protein. Menin does not directly bind to the Pax2 locus, instead, it up-regulates WT1 expression. WT1 recruits PcG complex to the Pax2 promoter and represses expression of Pax2 through PcG-dependent H3K27me3. Moreover, WT1 also interacts with DNA methyltransferase 1 (DNMT1), and recruits DNMT1 to the Pax2 promoter, resulting in hypermethylation of CpG in the Pax2 promoter. Together, these studies have uncovered a novel epigenetic mechanism whereby menin regulates H3K27me3 and promoter DNA methylation via WT1 and suggest that WT1 protein plays an important, yet previously unappreciated role in regulating the function of the menin/PcG axis, H3K27 methylation, and DNA methylation, resulting in repression of gene transcription.
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Affiliation(s)
- Bin Xu
- Department of Basic Medical Sciences, Medical College, Xiamen University, Xiamen, Fujian, China 361005
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24
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Gao SB, Hua X, Jin GH. Menin regulates endocrine diseases by controlling histone modification and gene transcription. Ann Endocrinol (Paris) 2008; 69:426-32. [PMID: 18752793 DOI: 10.1016/j.ando.2008.06.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Multiple endocrine neoplasia type 1 (MEN1), a human familial tumor syndrome, results from mutations in the Men1 gene. Although much progress has been made in demonstrating the definitive role for menin in suppressing tumorigenesis in endocrine organs, the molecular pathways responsible for menin action in normal tissues and tumors remain poorly defined. Here, we review the recent progress on the molecular functions of menin in controlling cell proliferation, apoptosis, and DNA repair. The majority of these functions are largely executed by menin-mediated influencing of histone modifications and chromatin structure. These findings lead to a new model of understanding menin's tumor-suppressing function, providing insights into understanding of how menin regulates cell proliferation and the development of endocrine tumors. The new knowledge could also be translated into new strategies to improve therapeutic interventions against MEN1 and other endocrine diseases including diabetes.
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Affiliation(s)
- S B Gao
- Department of Basic Medical Sciences, Xiamen University Medical College, No. 168, Daxue Road, Xiamen 361005, Fujian Province, PR China
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25
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Cao L, Du P, Jiang SH, Jin GH, Huang QL, Hua ZC. Enhancement of antitumor properties of TRAIL by targeted delivery to the tumor neovasculature. Mol Cancer Ther 2008; 7:851-61. [DOI: 10.1158/1535-7163.mct-07-0533] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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26
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Jin GH, Ma DY, Wu N, Marikar FMMT, Jin SZ, Jiang WW, Liu Y, Hua ZC. Combination of human plasminogen kringle 5 with ionizing radiation significantly enhances the efficacy of antitumor effect. Int J Cancer 2007; 121:2539-46. [PMID: 17680563 DOI: 10.1002/ijc.22708] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Antiangiogenic therapy could destroy tumor vasculature and inhibit tumor growth. It might inhibit tumor growth significantly when used as a single treatment modality and its therapeutic benefit may even be greater when used in combination with established treatment modalities such as radiation therapy (RT). In the present report, we investigated the effect of recombinant human plasminogen kringle 5 domain (rhK5) in combination with ionizing radiation on angiogenesis, tumor growth and survival in a murine Lewis lung carcinoma (LLC) tumor model. Combined treatment using rhK5 and radiotherapy displayed obvious suppressive effect on LLC tumor growth as compared with single treatment with either modality (p < 0.05), and resulted in a more additive effect on tumor growth delay in this model. In addition, combined treatment significantly enhanced the survival of mice and no toxic effect, such as weight loss, was observed. The significant antitumor effect of rhK5 plus radiation was associated with a direct suppression effect on early neoangiogenesis and tumor cell apoptosis. Furthermore, the expression of VEGF and HIF-1alpha in tumor tissue correlated well with decreased vessel density. The results suggest that rhK5 significantly enhances the antitumor activity of RT and could be a potent adjuvant therapeutic approach to improve the efficacy of radiotherapy for lung cancer.
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Affiliation(s)
- Guang-Hui Jin
- The State Key Laboratory of Pharmaceutical Biotechnology, College of Life Sciences, Nanjing University, Nanjing, People's Republic of China
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27
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Jin SZ, Pan XN, Wu N, Jin GH, Liu SZ. Whole-body low dose irradiation promotes the efficacy of conventional radiotherapy for cancer and possible mechanisms. Dose Response 2007; 5:349-58. [PMID: 18648558 DOI: 10.2203/dose-response.07-020.jin] [Citation(s) in RCA: 19] [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: 11/03/2022] Open
Abstract
The purpose of the present study was to explore the possibility of establishing cancer radiotherapy protocols that could promote treatment efficacy at a reduced radiation dose. Mouse models of melanoma (B16) and Lewis lung carcinoma (LLC) were used in the experiments. Conventional local radiotherapy was combined with low dose whole-body irradiation (LDWBI) in the presence or absence of gene therapy by intratumor injection of a recombinant plasmid Egr-mIL-18-B7.1 (E18B). After a number of trials with different combinations it was found that a protocol of 2-week treatment with 2 x (E18B + 2 Gy + 0.075 Gy x 2) was found to be able to promote treatment efficacy at a reduced radiation dose. In this protocol local irradiation with 2Gy was administered 24h after intratumor injection of 10 microg of the plasmid E18B followed by LDWBI with 0.075 Gy every other day for 2 sessions in 1 week, and the procedure was repeated for another week. When this combined treatment was compared with conventional radiotherapy, i.e., 2Gy every other day 3 times in one week repeated for 2 weeks, the treatment efficacy was improved, as judged by increased average survival rate, reduced mean tumor weight, reduced pulmonary metastasis and suppressed intratumor capillary growth with a 2/3 reduction of radiation dose. Immunologic studies showed stimulated natural killer (NK) and cytotoxic T lymphocyte (CTL) activity as well as increased interferon-gamma (IFN-gamma) secretion in this combined treatment group as compared with the group receiving local treatment alone. It is suggested that up-regulation of host anticancer immunity by LDWBI and the initiation of expression of immune genes by both the local large dose and LDWBI are important factors in the realization of improved cancer control.
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Affiliation(s)
- S Z Jin
- Jilin University Health Sciences Center, Changchun, China
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28
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Jia LJ, Wei DP, Sun QM, Jin GH, Li SF, Huang Y, Hua ZC. Tumor-targeting Salmonella typhimurium improves cyclophosphamide chemotherapy at maximum tolerated dose and low-dose metronomic regimens in a murine melanoma model. Int J Cancer 2007; 121:666-74. [PMID: 17397027 DOI: 10.1002/ijc.22688] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Chemotherapy for cancer is partly limited by the inability of drugs to act on poorly vascularized or avascularized areas of tumors. Tumor-targeting bacteria are capable of preferentially replicating in these poorly perfused regions. Some strains have been combined with chemotherapeutic agents and the results have been promising. However, no systematic work has been carried out to test the effect of bacteria on clinical modes of chemotherapy, such as standard maximum tolerated dose (MTD) and novel low-dose metronomic (LDM) chemotherapy. Here Salmonella typhimurium VNP20009 was combined with cyclophosphamide (CTX) at both MTD and LDM schedules in a murine melanoma model. The results showed that VNP20009 significantly improved the effects of all forms of CTX treatments. The combination of VNP20009 and CTX led to a more significant decrease in tumor microvessel density and serum vascular endothelial growth factor (VEGF) level, compared with either treatment alone. Furthermore, combination therapy remarkably increased the number of bacteria within tumors when compared with bacteria treatment alone. These findings suggest that tumor-targeting bacteria, in conjunction with CTX at standard MTD and LDM regimens, might be of clinical value for the treatment of melanoma.
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Affiliation(s)
- Li-Jun Jia
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Biochemistry, College of Life Science, Nanjing University, Nanjing 210093, People's Republic of China
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29
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Jin GH, Liu Y, Jin SZ, Liu XD, Liu SZ. UVB induced oxidative stress in human keratinocytes and protective effect of antioxidant agents. Radiat Environ Biophys 2007; 46:61-8. [PMID: 17279358 DOI: 10.1007/s00411-007-0096-1] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2006] [Accepted: 01/15/2007] [Indexed: 05/13/2023]
Abstract
This study aims at exploring the oxidative stress in keratinocytes induced by UVB irradiation and the protective effect of nutritional antioxidants. Cultured Colo-16 cells were exposed to UVB in vitro followed by measurement of reactive oxygen species (ROS), endogenous antioxidant enzyme activity, as well as cell death in the presence or absence of supplementation with vitamin C, vitamin E, or Ginsenoside Panoxatriol. Intracellular ROS content was found significantly reduced 1 h after exposure, but increased at later time points. After exposure to 150-600 J m(-2) UVB, reduction of ROS content was accompanied by increased activity of catalase and CuZn-superoxide dismutase at early time points. Vitamins C and E, and Ginsenoside Panoxatriol counteracted the increase of ROS in the Colo-16 cells induced by acute UVB irradiation. At the same time, Ginsenoside Panoxatriol protected the activity of CuZn-superoxide dismutase, while vitamin E showed only a moderate protective role. Vitamins C and E, and Ginsenoside Panoxatriol in combination protected the Colo-16 cells from UVB-induced apoptosis, but not necrosis. These findings suggest that vitamins C and E as well as Ginsenoside Panoxatriol are promising protective agents against UVB-induced damage in skin cells.
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Affiliation(s)
- Guang-Hui Jin
- MH Radiobiology Research Unit, Jilin University School of Public Health, 1163 Xinmin Street, Changchun, Jilin, 130021, People's Republic of China
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30
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Dong W, Jin GH, Li SF, Sun QM, Ma DY, Hua ZC. Cross-linked polyethylenimine as potential DNA vector for gene delivery with high efficiency and low cytotoxicity. Acta Biochim Biophys Sin (Shanghai) 2006; 38:780-7. [PMID: 17091195 DOI: 10.1111/j.1745-7270.2006.00220.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Polyethylenimine (PEI) has been known as an efficient gene carrier with the highest cationic charge potential. High transfection efficiency of PEI, along with its cytotoxicity, strongly depends on its molecular weight. To enhance its gene delivery efficiency and minimize cytotoxicity, we have synthesized small cross-linked PEI with biodegradable linkages and evaluated their transfection efficiencies in vitro. In this study, branched PEI with a molecular weight of 800 Da was cross-linked by small diacrylate [1,4-butanediol diacrylate or ethyleneglycol dimethacrylate (EGDMA)] for 2-6 h. The efficiencies of the cross-linked PEI in in vitro transfection of plasmid DNA containing enhanced green fluorescent protein (EGFP) reporter gene were assessed in melanoma B16F10 cell line and other cell lines. Flow cytometry was used to quantify the cellular entry efficiency of plasmid and the transgene expression level. The cytotoxicities of the cross-linked PEI in these cells were evaluated by MTT assay. EGDMA-PEI 800-4h, a typical cross-linked PEI reported here, mediated a more efficient expression of reporter gene than the commercially available 25-kDa branched PEI control, and resulted in a 9-fold increase in gene delivery in B16F10 cells and a 16-fold increase in 293T cells, while no cytotoxicity was found at the optimized condition for gene delivery. Furthermore, the transfection activity of polyplexes was preserved in the presence of serum proteins.
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Affiliation(s)
- Wei Dong
- State Key Laboratory of Pharmaceutical Biotechnology, College of Life Science, Nanjing University, Nanjing 210093, China
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31
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Jin GH, Jin SZ, Liu Y, Xu RM, Yang JZ, Pan XN, Liu SZ. Therapeutic effect of gene-therapy in combination with local X-irradiation in a mouse malignant melanoma model. Biochem Biophys Res Commun 2005; 330:975-81. [PMID: 15809091 DOI: 10.1016/j.bbrc.2005.03.070] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2005] [Indexed: 11/20/2022]
Abstract
Plasmid containing mIL-18 and B7.1 genes downstream of Egr-1 promoter was constructed and used in gene-radiotherapy on malignant melanoma in C57BL/6J mice implanted with B16 cells followed by exploration of the immunologic mechanism of the therapeutic effect. The treatment with plasmid pEgr-IL-18-B7.1 plus local X-irradiation showed more effective suppression of tumor growth than the treatment with radiation alone, pEgr-IL-18-B7.1 alone, or single gene pEgr-IL-18 (or pEgr-B7.1) combined with local X-irradiation. Anticancer immunity was found to be significantly upregulated in tumor-bearing mice treated with pEgr-IL-18-B7.1 plus local X-irradiation. IL-18 showed no direct killing effect on malignant melanoma cells in vitro, and the mechanism of the combined therapy with pEgr-IL-18-B7.1 and local X-irradiation was apparently related with the stimulation of host anticancer immunity by increased secretion of IL-18 and upregulated immunogenicity of the tumor cells by increased expression of B7.1 on their surface in addition to the direct effect of local X-irradiation on the tumor cells.
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Affiliation(s)
- Guang-Hui Jin
- Immunobiology Laboratory, MH Radiobiology Research Unit, Jilin University Norman, Bethune Health Sciences Center, 828 Xinmin Street, Changchun 130021, PR China
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