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Lu XS, Huang ML, Chen LB, Liu SC, Huang ZX, Liu SM. SCARA5 as a downstream factor of PCAT29, inhibits proliferation, migration, and invasion of bladder cancer. Genomics 2023; 115:110667. [PMID: 37315873 DOI: 10.1016/j.ygeno.2023.110667] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 04/27/2023] [Accepted: 06/10/2023] [Indexed: 06/16/2023]
Abstract
Scavenger receptor class A, member 5 (SCARA5) has been identified a novel tumor suppressor in several cancers. However, the functional and underlying mechanism of SCARA5 in bladder cancer (BC) need investigation. Here, we found SCARA5 expression was downregulated in both BC tissues and cell lines. Low SCARA5 in BC tissues was associated with a shorter overall survival. Moreover, SCARA5 overexpression reduced BC cell viability, colony formation, invasion, and migration. Further investigation demonstrated that the expression of SCARA5 was negatively regulated by miR-141. Furthermore, the long non-coding RNA prostate cancer associated transcript 29 (PCAT29) inhibited the proliferation, invasion, and migration of BC cells by sponging miR-141. Luciferase activity assays revealed that PCAT29 targeted miR-141 and miR-141 targeted SCARA5. In conclusion, SCARA5, as a downstream factor of the PCAT29/miR-141 axis, inhibited the proliferation, migration, and invasion of BC cells. These findings provide novel insights into the detailed molecular mechanisms of BC development.
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Affiliation(s)
- Xin-Sheng Lu
- The First Affiliated Hospital, Department of Urology, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China
| | - Meng-Long Huang
- The First Affiliated Hospital, Department of Urology, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China
| | - Li-Bo Chen
- The First Affiliated Hospital, Department of Urology, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China
| | - Shu-Cheng Liu
- The First Affiliated Hospital, Department of Urology, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China
| | - Zhong-Xin Huang
- The First Affiliated Hospital, Department of Urology, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China
| | - Shi-Min Liu
- The First Affiliated Hospital, Department of Urology, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, China.
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Shi C, Liu JZ, Zeng ZP, Miao Q, Fang LG, Chen S, Ping F, Sun H, Lu L, Chen LB, Fu Y, Zhao DC, Yu CH, JiaJue RZ, Wang X, Liu XR, Ma GT, Zhang CJ, Pan H, Yang HB, Wang YN, Li M, Li F, Shen ZJ, Liang ZY, Xing XP, Zhu WL. Diagnosis, Genetics, and Management of 24 Patients With Cardiac Paragangliomas: Experience From a Single Center. J Endocr Soc 2023; 7:bvad093. [PMID: 37873498 PMCID: PMC10590637 DOI: 10.1210/jendso/bvad093] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Indexed: 10/25/2023] Open
Abstract
Context Paragangliomas located within the pericardium represent a rare yet challenging clinical situation. Objective The current analysis aimed to describe the clinical characteristics of cardiac paragangliomas, with emphasis on the diagnostic approach, genetic background, and multidisciplinary management. Methods Twenty-four patients diagnosed with cardiac paraganglioma (PGL) in Peking Union Medical College Hospital, Beijing, China, between 2003 and 2021 were identified. Clinical data was collected from medical record. Genetic screening and succinate dehydrogenase subunit B immunohistochemistry were performed in 22 patients. Results The median age at diagnosis was 38 years (range 11-51 years), 8 patients (33%) were females, and 4 (17%) had familial history. Hypertension and/or symptoms related to catecholamine secretion were present in 22 (92%) patients. Excess levels of catecholamines and/or metanephrines were detected in 22 (96%) of the 23 patients who have completed biochemical testing. Cardiac PGLs were localized with 131I-metaiodobenzylguanidine scintigraphy in 11/22 (50%), and 99mTc-hydrazinonicotinyl-tyr3-octreotide scintigraphy in 24/24 (100%) patients. Genetic testing identified germline SDHx mutations in 13/22 (59%) patients, while immunohistochemistry revealed succinate dehydrogenase (SDH) deficiency in tumors from 17/22 (77%) patients. All patients were managed by a multidisciplinary team through medical preparation, surgery, and follow-up. Twenty-three patients received surgical treatment and perioperative death occurred in 2 cases. Overall, 21 patients were alive at follow-up (median 7.0 years, range 0.6-18 years). Local recurrence or metastasis developed in 3 patients, all of whom had SDH-deficient tumors. Conclusion Cardiac PGLs can be diagnosed based on clinical manifestations, biochemical tests, and appropriate imaging studies. Genetic screening, multidisciplinary approach, and long-term follow-up are crucial in the management of this disease.
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Affiliation(s)
- Chuan Shi
- Department of Endocrinology, Key Laboratory of Endocrinology of National Health Commission, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
- Department of Internal Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, China
| | - Jian-Zhou Liu
- Department of Cardiac Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, China
| | - Zheng-Pei Zeng
- Department of Endocrinology, Key Laboratory of Endocrinology of National Health Commission, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Qi Miao
- Department of Cardiac Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, China
| | - Li-Gang Fang
- Department of Cardiology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, China
| | - Shi Chen
- Department of Endocrinology, Key Laboratory of Endocrinology of National Health Commission, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Fan Ping
- Department of Endocrinology, Key Laboratory of Endocrinology of National Health Commission, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Hao Sun
- Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, China
| | - Lin Lu
- Department of Endocrinology, Key Laboratory of Endocrinology of National Health Commission, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Li-Bo Chen
- Department of Nuclear Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, China
| | - Yong Fu
- Department of Endocrinology, Key Laboratory of Endocrinology of National Health Commission, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Da-Chun Zhao
- Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, China
| | - Chun-Hua Yu
- Department of Anesthesiology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, China
| | - Rui-Zhi JiaJue
- Department of Endocrinology, Key Laboratory of Endocrinology of National Health Commission, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Xi Wang
- Department of Endocrinology, Key Laboratory of Endocrinology of National Health Commission, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Xing-Rong Liu
- Department of Cardiac Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, China
| | - Guo-Tao Ma
- Department of Cardiac Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, China
| | - Chao-Ji Zhang
- Department of Cardiac Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, China
| | - Hui Pan
- Department of Endocrinology, Key Laboratory of Endocrinology of National Health Commission, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Hong-Bo Yang
- Department of Endocrinology, Key Laboratory of Endocrinology of National Health Commission, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Yi-Ning Wang
- Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, China
| | - Ming Li
- Department of Clinical Laboratory, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, China
| | - Fang Li
- Department of Nuclear Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, China
| | - Zhu-Jun Shen
- Department of Cardiology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, China
| | - Zhi-Yong Liang
- Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, China
| | - Xiao-Ping Xing
- Department of Endocrinology, Key Laboratory of Endocrinology of National Health Commission, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Wen-Ling Zhu
- Department of Cardiology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, China
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Peng HM, Zhou ZK, Zhao JN, Wang F, Liao WM, Zhang WM, Jiang Q, Yan SG, Cao L, Chen LB, Xiao J, Xu WH, He R, Xia YY, Xu YQ, Xu P, Zuo JL, Hu YH, Wang WC, Huang W, Wang JC, Tao SQ, Qian QR, Wang YZ, Zhang ZQ, Tian XB, Wang WW, Jin QH, Zhu QS, Yuan H, Shang XF, Shi ZJ, Zheng J, Xu JZ, Liu JG, Xu WD, Weng XS, Qiu GX. [Revision rate of periprosthetic joint infection post total hip or knee arthroplasty of 34 hospitals in China between 2015 and 2017: a multi-center survey]. Zhonghua Yi Xue Za Zhi 2023; 103:999-1005. [PMID: 36990716 DOI: 10.3760/cma.j.cn112137-20221108-02351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
Abstract
Objective: To investigate the rate of periprosthetic joint infection (PJI) revision surgeries and clinical information of hip-/knee- PJI cases nationwide from 2015 to 2017 in China. Methods: An epidemiological investigation. A self-designed questionnaire and convenience sampling were used to survey 41 regional joint replacement centers nationwide from November 2018 to December 2019 in China. The PJI was diagnosed according to the Musculoskeletal Infection Association criteria. Data of PJI patients were obtained by searching the inpatient database of each hospital. Questionnaire entries were extracted from the clinical records by specialist. Then the differences in rate of PJI revision surgery between hip- and knee- PJI revision cases were calculated and compared. Results: Total of 36 hospitals (87.8%) nationwide reported data on 99 791 hip and knee arthroplasties performed from 2015 to 2017, with 946 revisions due to PJI (0.96%). The overall hip-PJI revision rate was 0.99% (481/48 574), and it was 0.97% (135/13 963), 0.97% (153/15 730) and 1.07% (193/17 881) in of 2015, 2016, 2017, respectively. The overall knee-PJI revision rate was 0.91% (465/51 271), and it was 0.90% (131/14 650), 0.88% (155/17 693) and 0.94% (179/18 982) in 2015, 2016, 2017, respectively. Heilongjiang (2.2%, 40/1 805), Fujian (2.2%, 45/2 017), Jiangsu (2.1%, 85/3 899), Gansu (2.1%, 29/1 377), Chongqing (1.8%, 64/3 523) reported relatively high revision rates. Conclusions: The overall PJI revision rate in 34 hospitals nationwide from 2015 to 2017 is 0.96%. The hip-PJI revision rate is slightly higher than that in the knee-PJI. There are differences in revision rates among hospitals in different regions.
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Affiliation(s)
- H M Peng
- Department of Orthopedic Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - Z K Zhou
- Department of Orthopaedics, West China Hospital of Sichuan University, Chengdu 610041, China
| | - J N Zhao
- Department of Orthopaedics, General Hospital of Eastern War Zone, People's Liberation Army, Nanjing 210002, China
| | - F Wang
- Department of Orthopedic Surgery, Third Hospital of Hebei Medical University, Shijiazhuang 050051, China
| | - W M Liao
- Department of Orthopedic Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510008, China
| | - W M Zhang
- Department of Joint Surgery, First Affiliated Hospital of Fujian Medical University, Fuzhou 350009, China
| | - Q Jiang
- Department of Orthopedic Surgery, Drum Tower Hospital of Nanjing University, Nanjing 210008, China
| | - S G Yan
- Department of Orthopaedic Surgery, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou 310058, China
| | - L Cao
- Department of Orthopaedic Surgery, First Affiliated Hospital of Xinjiang Medical University, Urumqi 830054, China
| | - L B Chen
- Department of Orthopaedic Surgery, Central South Hospital of Wuhan University, Wuhan 430071, China
| | - J Xiao
- Department of Orthopaedic Surgery, Wuhan Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan 430030, China
| | - W H Xu
- Department of Orthopedic Surgery, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430032, China
| | - R He
- Department of Orthopedic Surgery, the Southwest Hospital of Army Medical University, Chongqing 400038, China
| | - Y Y Xia
- Department of Orthopedic Surgery, Second Hospital of Lanzhou University, Lanzhou 730030, China
| | - Y Q Xu
- Department of Orthopedic Surgery, 920th Hospital of the People's Liberation Army, Kunming 650032, China
| | - P Xu
- Department of Orthopedic Surgery, Xi'an Red Cross Hospital, Xi'an Jiaotong University, Xi'an 710054, China
| | - J L Zuo
- Department of Orthopedic Surgery, China-Japan Friendship Hospital, Jilin University, Changchun 130031, China
| | - Y H Hu
- Department of Orthopedic Surgery, Xiangya Hospital, Central South University, Changsha 410008, China
| | - W C Wang
- Department of Orthopedic Surgery, Second Hospital of Xiangya, Central South University, Changsha 410016, China
| | - W Huang
- Department of Orthopedic Surgery, First Hospital of Chongqing Medical University, Chongqing 400010, China
| | - J C Wang
- Department of Orthopedic Surgery, Second Hospital of Jilin University, Changchun 130021, China
| | - S Q Tao
- Department of Orthopedic Surgery, Second Hospital of Harbin Medical University, Harbin 150001, China
| | - Q R Qian
- Department of Orthopedic Surgery, Shanghai Changzheng Hospital, Shanghai 200030, China
| | - Y Z Wang
- Department of Orthopedic Surgery, Affiliated Hospital of Qingdao University, Qingdao 266003, China
| | - Z Q Zhang
- Department of Orthopedic Surgery, Second Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - X B Tian
- Department of Orthopedic Surgery, Affiliated Hospital of Guizhou Medical University, Guiyang 550000, China
| | - W W Wang
- Department of Orthopaedic Surgery, the First Affiliated Hospital of Harbin Medical University, Harbin 150000, China
| | - Q H Jin
- Department of Orthopaedic Surgery, Affiliated Hospital of Ningxia Medical University, Yinchuan 750010, China
| | - Q S Zhu
- Xijing Hospital of Air Force Military Medical University, Xi'an 710032, China
| | - H Yuan
- Department of Orthopedic Surgery, Xinjiang Uygur Autonomous Region People's Hospital, Urumqi 830002, China
| | - X F Shang
- Department of Orthopedic Surgery, the First Affiliated Hospital of University of Science and Technology of China (Anhui Provincial Hospital), Hefei 230001, China
| | - Z J Shi
- Department of Orthopedic Surgery, Southern Hospital, Southern Medical University, Guangzhou 510515, China
| | - J Zheng
- Department of Orthopedic Surgery, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - J Z Xu
- Department of Orthopedic Surgery, the First Hospital of Zhengzhou University, Zhengzhou 450002, China
| | - J G Liu
- Department of Orthopedic Surgery, the First Bethune Hospital of Jilin University, Changchun 130000, China
| | - W D Xu
- Department of Orthopaedic Surgery, Shanghai Changhai Hospital, Shanghai 200082, China
| | - X S Weng
- Department of Orthopedic Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - G X Qiu
- Department of Orthopedic Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
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Liu SC, Cao YH, Chen LB, Kang R, Huang ZX, Lu XS. BMSC-derived exosomal lncRNA PTENP1 suppresses the malignant phenotypes of bladder cancer by upregulating SCARA5 expression. Cancer Biol Ther 2022; 23:1-13. [PMID: 35998226 PMCID: PMC9415615 DOI: 10.1080/15384047.2022.2102360] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
LncRNAs can be transported to tumor cells where they exert regulatory effects by bone marrow mesenchymal stem cells (BMSC)-derived exosomes. Here, we aimed to investigate the functional mechanism of BMSC-derived exosomal lncRNA PTENP1 in the progression of bladder cancer (BC). Methods of BMSC were identified by detecting surface markers through flow cytometry. Exosomes from BMSC were identified by transmission electron microscopy, nanoparticle tracking analysis (NTA), and western blot analysis of exosome markers. Cellular internalization of BMSC-derived exosomes (BMSC-Exo) into BC cells was detected by confocal microscopy. CCK-8, colony formation, flow cytometry, wound healing, and transwell assays were adopted to estimate cell proliferation, apoptosis, migration, and invasion abilities, respectively. Interplay between miR-17 and lncRNA PTENP1 or SCARA5 was verified by dual-luciferase reporter, RNA pull down, and/or RNA immunoprecipitation (RIP) assays. Tumor xenograft assay was conducted in nude mice to study the role of exosomal lncRNA PTENP1 in BC progression in vivo. We showed exosomal lncRNA PTENP1 can be delivered into and suppress the malignant phenotypes of BC cells. LncRNA PTENP1 was identified as a sponge of miR-17, and SCARA5 was identified as a target gene of miR-17. The exosomes derived from PTENP1-overexpressing BMSC (BMSCOE-PTENP1-Exo) abolished the promotive effects of miR-17 overexpression or SCARA5 knockdown on the malignant phenotypes of BC cells. Moreover, exosomal lncRNA PTENP1 was demonstrated to inhibit BC tumor growth in nude mice by miR-17/SCARA5 axis. In conclusion, BMSC-derived exosomal PTENP1 suppressed the BC progression by upregulating the expression of SCARA5 via sponging miR-17, offering a potential novel therapeutic target for BC therapy.
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Affiliation(s)
- Shu-Cheng Liu
- The First Affiliated Hospital, Department of Urology, Hengyang Medical School, University of South China, Hengyang, China
| | - You-Han Cao
- The First Affiliated Hospital, Department of Urology, Hengyang Medical School, University of South China, Hengyang, China
| | - Li-Bo Chen
- The First Affiliated Hospital, Department of Urology, Hengyang Medical School, University of South China, Hengyang, China
| | - Ran Kang
- The First Affiliated Hospital, Department of Urology, Hengyang Medical School, University of South China, Hengyang, China
| | - Zhong-Xin Huang
- The First Affiliated Hospital, Department of Urology, Hengyang Medical School, University of South China, Hengyang, China
| | - Xin-Sheng Lu
- The First Affiliated Hospital, Department of Urology, Hengyang Medical School, University of South China, Hengyang, China
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Liu SC, Chen LB, Chen PF, Huang ML, Liu TP, Peng J, Lu XS. PDCD5 inhibits progression of renal cell carcinoma by promoting T cell immunity: with the involvement of the HDAC3/microRNA-195-5p/SGK1. Clin Epigenetics 2022; 14:131. [PMID: 36266728 PMCID: PMC9583501 DOI: 10.1186/s13148-022-01336-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 09/19/2022] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Epigenetics exerts a vital role in the onset and development of renal cell carcinoma (RCC). Mounting evidence has shed light on the significance of human immune system in response to tumor infiltrating T cells. Hereby, we sought to unmask the immunomodulatory role of histone deacetylase 3 (HDAC3) and its potential upstream molecule, programmed cell death 5 (PDCD5) in RCC. METHODS RCC and adjacent non-cancerous tissues were clinically resected from 58 patients, in which the expression profile of microRNA-195-5p (miR-195-5p), PDCD5, HDAC3, and serum glucocorticoid-inducible kinase 1 (SGK1) was determined by RT-qPCR and Western blot analysis. Their relations were investigated by a series of luciferase assays in combination with ChIP and co-IP. RCC cells (A498) were intervened using gain- and loss-of-function approaches, followed by cell proliferation evaluation. After co-culture with CD3+ T cells, flow cytometry and interferon-γ (IFN-γ) determination were performed. A xenograft tumor mouse model was developed for in vivo validation. RESULTS PDCD5 was downregulated in RCC tissues and A498 cells. Upregulation of HDAC3, as well as of SGK1, resulted in suppression of A498 cell proliferation and promotion of T cell activation as evidenced by higher IFN-γ expression. Re-expression of PDCD5 downregulated HDAC3, causing a subsequent upregulation of miR-195-5p, while miR-195-5p could inversely modulate its target gene, SGK1. The regulatory mechanism appeared to be functional in vivo. CONCLUSION Our results highlight the possible manipulation by PDCD5 on RCC cell proliferation and T cell activation, which provides new clues to better understand the immune balance in RCC progression.
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Affiliation(s)
- Shu-Cheng Liu
- The First Affiliated Hospital, Department of Urology, Hengyang Medical School, University of South China, Hengyang, 421001, Hunan, China
| | - Li-Bo Chen
- The First Affiliated Hospital, Department of Urology, Hengyang Medical School, University of South China, Hengyang, 421001, Hunan, China
| | - Ping-Feng Chen
- The First Affiliated Hospital, Department of Urology, Hengyang Medical School, University of South China, Hengyang, 421001, Hunan, China
| | - Meng-Long Huang
- The First Affiliated Hospital, Department of Urology, Hengyang Medical School, University of South China, Hengyang, 421001, Hunan, China
| | - Tian-Pei Liu
- The First Affiliated Hospital, Department of Urology, Hengyang Medical School, University of South China, Hengyang, 421001, Hunan, China
| | - Jun Peng
- The First Affiliated Hospital, Department of Neurology, Hengyang Medical School, University of South China, Hengyang, 421001, Hunan, China.
| | - Xin-Sheng Lu
- The First Affiliated Hospital, Department of Urology, Hengyang Medical School, University of South China, Hengyang, 421001, Hunan, China.
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Chen LB, Huang YH, Dai CY, Zhu LQ, Zhao X, Zhang K, Fu XR, Yang W, Yang MB. Effects of convective schemes and geometric reconstruction scheme on interface of multiple melt flows. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Lu XS, Huang ML, Chen LB, Liu SC, Huang ZX, Liu SM. WITHDRAWN: SCARA5 regulated by MEG3/miR-141 axis attenuates proliferation, migration and invasion of bladder cancer. Life Sci 2021:119619. [PMID: 34015283 DOI: 10.1016/j.lfs.2021.119619] [Citation(s) in RCA: 1] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 04/28/2021] [Accepted: 05/10/2021] [Indexed: 01/04/2023]
Abstract
This article has been withdrawn at the request of the author(s) and/or editor. The Publisher apologizes for any inconvenience this may cause. The full Elsevier Policy on Article Withdrawal can be found at https://www.elsevier.com/about/our-business/policies/article-withdrawal
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Affiliation(s)
- Xin-Sheng Lu
- Department of Urology, the First Affiliated Hospital, University of South China, Hengyang 421000, Hunan Province, China
| | - Meng-Long Huang
- Department of Urology, the First Affiliated Hospital, University of South China, Hengyang 421000, Hunan Province, China
| | - Li-Bo Chen
- Department of Urology, the First Affiliated Hospital, University of South China, Hengyang 421000, Hunan Province, China
| | - Shu-Cheng Liu
- Department of Urology, the First Affiliated Hospital, University of South China, Hengyang 421000, Hunan Province, China
| | - Zhong-Xin Huang
- Department of Urology, the First Affiliated Hospital, University of South China, Hengyang 421000, Hunan Province, China
| | - Shi-Min Liu
- Department of Urology, the First Affiliated Hospital, University of South China, Hengyang 421000, Hunan Province, China.
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Chen LB, Zhu SP, Liu TP, Zhao H, Chen PF, Duan YJ, Hu R. Cancer Associated Fibroblasts Promote Renal Cancer Progression Through a TDO/Kyn/AhR Dependent Signaling Pathway. Front Oncol 2021; 11:628821. [PMID: 33842334 PMCID: PMC8027476 DOI: 10.3389/fonc.2021.628821] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 03/08/2021] [Indexed: 12/12/2022] Open
Abstract
Cancer associated fibroblasts (CAFs) play crucial roles in cancer development, however, the specific mechanisms of CAFs associated renal cancer progression remain poorly understood. Our study observed enriched CAFs in high degree malignant tumor tissues from renal cancer patients. These CAFs isolated from tumor tissues are prone to facilitate drugs resistance and promote tumor progression in vitro and in vivo. Mechanistically, CAFs up-regulated tryptophan 2, 3-dioxygenase (TDO) expression, resulting in enhanced secretion of kynurenine (Kyn). Kyn produced from CAFs could up-regulated the expression of aromatic hydrocarbon receptor (AhR), eventually resulting in the AKT and STAT3 signaling pathways activation. Inhibition of AKT signal prevented cancer cells proliferation, while inhibition of the STAT3 signal reverted drugs resistance and cancer migration induced by kynurenine. Application of AhR inhibitor DMF could efficiently suppress distant metastasis of renal cancer cells, and improve anticancer effects of sorafenib (Sor)/sunitinib (Sun), which described a promising therapeutic strategy for clinical renal cancer.
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Affiliation(s)
- Li-Bo Chen
- Department of Urology, The First Affiliated Hospital of University of South China, Hengyang, China
| | - Shun-Ping Zhu
- Department of Respiratory, The First Affiliated Hospital of University of South China, Hengyang, China
| | - Tian-Pei Liu
- Department of Urology, The First Affiliated Hospital of University of South China, Hengyang, China
| | - Heng Zhao
- Department of Radiology, The First Affiliated Hospital of University of South China, Hengyang, China
| | - Ping-Feng Chen
- Department of Urology, The First Affiliated Hospital of University of South China, Hengyang, China
| | - You-Jun Duan
- Department of Urology, The First Affiliated Hospital of University of South China, Hengyang, China
| | - Rong Hu
- Department of Radiology, The First Affiliated Hospital of University of South China, Hengyang, China
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Chen LB, An Z, Zheng HK, Wang XP, Shan RT, Mao CY, Zhang WQ. MicroRNA-34c suppresses proliferation of vascular smooth muscle cell via modulating high mobility group box protein 1. J Clin Lab Anal 2020; 34:e23293. [PMID: 32157741 PMCID: PMC7370740 DOI: 10.1002/jcla.23293] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 01/30/2020] [Accepted: 02/05/2020] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Atherosclerosis is the most frequent pathological process that causes cardiovascular diseases. OBJECTIVE The present study aimed to confirm miRNAs associated with atherosclerosis and explore the molecular mechanism of miR-34c and its target high mobility group box protein 1 (HMGB1) in the control of growth of smooth muscle cells in the development of atherosclerosis. METHODS Real-time PCR was firstly performed to confirm miRNA correlation with atherosclerosis, and computational analysis and luciferase assay were performed to explore the target of miR-34c, Western blot, and real-time PCR were also utilized to reveal the effect of whether high glucose (HG) and miR-34c affect miR-34c, HMGB1 levels, NF-κB p65 and TNF-α levels, and the role of miR-34c on vascular smooth muscle cells (VSMCs) viability induced by HG. Students' unpaired t test was performed to compare data between two groups. RESULTS MiR-34c level was associated with atherosclerosis with different expression between VSMCs treated with high glucose or normal VSMCs. Then, HMGB1 is a virtual target of miR-34c with predicted binding site resided in HMGB1 3'UTR and further verified by that miR-34c remarkably reduced luciferase activity of wild HMGB1 3'UTR under a concentration-dependent fashion, and miR-34c cannot influence luciferase activity of mutant HMGB1 3'UTR. CONCLUSIONS The results suggested miR-34c might be a novel therapeutic strategy in the management of atherosclerosis by suppressing the expression of HGMB1 and its downstream effectors.
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Affiliation(s)
- Li-Bo Chen
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Zhe An
- Department of Cardiovascular, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Hai-Kuo Zheng
- Department of Cardiovascular, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Xin-Peng Wang
- Department of Cardiovascular, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Rui-Ting Shan
- Department of Cardiovascular, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Cui-Ying Mao
- Department of Cardiovascular, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Wen-Qi Zhang
- Department of Cardiovascular, China-Japan Union Hospital of Jilin University, Changchun, China
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Zhou X, Peng LY, Wang ZC, Wang W, Zhu Z, Huang XH, Chen LB, Song QS, Bao YY. Identification of novel antimicrobial peptides from rice planthopper, Nilaparvata lugens. Insect Biochem Mol Biol 2019; 113:103215. [PMID: 31449847 DOI: 10.1016/j.ibmb.2019.103215] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 08/14/2019] [Accepted: 08/18/2019] [Indexed: 05/08/2023]
Abstract
In this study, two novel antibacterial peptide genes, termed lugensin A and B were identified and characterized from a rice sap-sucking hemipteran insect pest, the brown planthopper, Nilaparvata lugens. Lugensin gene expression was significantly induced by Gram-negative and Gram-positive bacterial stains under the regulation of a signal receptor, the long peptidoglycan recognition protein (PGRP-LC) in the IMD pathway. Knockdown of PGRP-LC by RNAi eliminated bacterium induced Lugensin gene expression. Lugensins had the apparent antibacterial activities against Escherichia coli K12, Bacillus subtilis and the rice bacterial brown stripe pathogen Acidovorax avenae subsp. avenae (Aaa) strain RS-1. Lugensins inhibited bacterial proliferation by disrupting the integrity of the bacterial membranes. Scanning electron microscopy revealed abnormal membrane morphology of the recombinant Lugensin-treated bacteria. Lugensins induced complete cell disruption of E. coli K12 and B. subtilis strains while formed the holes on the cell surface of Aaa RS-1 strain. Immunofluorescence showed that Lugensins localized in the cell membrane of E. coli K12 while accumulated in the cytosol of B. subtilis. Differently, Lugensins remained in both the cell membrane and the cytosol of Aaa RS-1 strain, suggesting different action modes of Lugensins to different microbes. This is the first report of the novel antibacterial peptides found in the rice sap-sucking hemipteran insect species.
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Affiliation(s)
- Xiang Zhou
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insect Pests, Institute of Insect Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Lu-Yao Peng
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insect Pests, Institute of Insect Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Zhe-Chao Wang
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insect Pests, Institute of Insect Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Wei Wang
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insect Pests, Institute of Insect Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Zhen Zhu
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insect Pests, Institute of Insect Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Xiao-Hui Huang
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insect Pests, Institute of Insect Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Li-Bo Chen
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insect Pests, Institute of Insect Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Qi-Sheng Song
- Division of Plant Sciences, College of Agriculture, Food and Natural Resources, University of Missouri, USA.
| | - Yan-Yuan Bao
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insect Pests, Institute of Insect Sciences, Zhejiang University, Hangzhou, 310058, China.
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Liu L, Huang YH, Xie DD, Chen LB, Chen R, Liu ZY, Yang W, Yang MB. Role of Controlled Diameter of Polyamide 6 (PA6) Fibers on the Formation of Interfacial Hybrid Crystal Morphology in HDPE/PA6 Microfibril Blend. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b01045] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lei Liu
- College of Polymer Science & Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Yan-Hao Huang
- College of Polymer Science & Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Dan-Dan Xie
- College of Polymer Science & Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Li-Bo Chen
- College of Polymer Science & Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Rui Chen
- College of Polymer Science & Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Zheng-Ying Liu
- College of Polymer Science & Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Wei Yang
- College of Polymer Science & Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Ming-Bo Yang
- College of Polymer Science & Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
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Feng CP, Chen LB, Tian GL, Wan SS, Bai L, Bao RY, Liu ZY, Yang MB, Yang W. Multifunctional Thermal Management Materials with Excellent Heat Dissipation and Generation Capability for Future Electronics. ACS Appl Mater Interfaces 2019; 11:18739-18745. [PMID: 31026137 DOI: 10.1021/acsami.9b03885] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Thermal management materials (TMMs) used in electronic devices are crucial for future electronics and technologies such as flexible electronics and artificial intelligence (AI) technologies. As future electronics will work in a more complicated circumstance, the overheating and overcooling problems can exist in the same electronics while the common TMMs cannot meet the demand of thermal management for future electronics. In this work, nacre-mimetic graphene-based films with super flexibility and durability (in over 10,000 tensile cycles), excellent capability to dissipate excess heat (20.84 W/(m·K) at only 16-22 μm thickness), and outstanding heating performance to generate urgent heat for electronics under extremely cold conditions are fabricated by a facile solution casting method, and the fabricated composites are proved to be superior multifunctional TMMs for the thermal management in electronic chips. In addition, the application of the paper-like films with high in-plane thermal conductivity to a flexible heat spreader and film heater is demonstrated by simulation using a finite volume method, which shows the high importance of the in-plane thermal conductivity in thermal management of electronics.
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Affiliation(s)
- Chang-Ping Feng
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu 610065 , Sichuan , People's Republic of China
| | - Li-Bo Chen
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu 610065 , Sichuan , People's Republic of China
| | - Guo-Liang Tian
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu 610065 , Sichuan , People's Republic of China
| | - Shen-Shen Wan
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu 610065 , Sichuan , People's Republic of China
| | - Lu Bai
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu 610065 , Sichuan , People's Republic of China
| | - Rui-Ying Bao
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu 610065 , Sichuan , People's Republic of China
| | - Zheng-Ying Liu
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu 610065 , Sichuan , People's Republic of China
| | - Ming-Bo Yang
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu 610065 , Sichuan , People's Republic of China
| | - Wei Yang
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu 610065 , Sichuan , People's Republic of China
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Chen LB, Liu ZH, Wang H, Liu SM. [Diagnosis and treatment of testicular mixed germ cell tumors: A report of 27 cases]. Zhonghua Nan Ke Xue 2018; 24:987-991. [PMID: 32212472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
OBJECTIVE To investigate the clinical features, diagnosis, treatment and prognosis of testicular mixed germ cell tumors (TMGCT). METHODS This retrospective study included 27 cases (2 children and 25 adults) of TMGCT confirmed surgically and pathologically in our hospital from December 2007 to December 2012. The patients' ranged in the age of onset from 7 months to 63 years, averaging at 29.5 years. We analyzed the clinical data and reviewed the related literature. RESULTS At pathological examination, the TMGCTs displayed a variety of subtypes, including 13 cases of yolk sac tumor (48.1%), 13 cases of seminoma (48.1%), 18 cases of embryonal carcinoma (66.7%), 4 cases of choriocarcinoma (14.8%) and 17 cases of teratoma (63.0%). Of the total number of cases, 15 (55.6%) contained two different germ cell histological elements, 11 (40.7%) contained three, and 1 (3.7%) contained four; 18 cases (66.7%) were in stage Ⅰ, 6 (22.2%) in stage Ⅱ, and 3 (11.1%) in stage Ⅲ. All the patients underwent radical orchiectomy and, in addition, retroperitoneal lymph node dissection (RPLND) + BEP chemotherapy was administered for 3 cases of stage Ⅱ and 1 case of stage Ⅲ. Three cases of stage Ⅱ and 2 cases of stage Ⅲ refused RPLND and 1 case of stage Ⅲ refused chemotherapy. A 27-49-month (mean 30 months) follow-up was completed for 21 of the patients, during which retroperitoneal metastasis was found in 3 cases of stage Ⅰ and 2 cases of stage Ⅱ, who again received RPLND+BEP and experienced no more recurrence. One case of stage Ⅲ refused both RPLND and chemotherapy and died at 12 months. CONCLUSIONS TMGCT is a rare carcinoma with atypical clinical features, mostly comprising two or three different germ cell histological elements. Comprehensive treatment of RPLND combined with BEP chemotherapy may achieve a high survival rate and reduce recurrence for most of the patients with TMGCT of stage Ⅱ or above.
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Affiliation(s)
- Li-Bo Chen
- Department of Urology, The First Hospital Affiliated to Nanhua University, Hengyang, Hunan 421001, China
| | - Zhi-Hong Liu
- Department of Urology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Hao Wang
- Department of Urology, The First Hospital Affiliated to Nanhua University, Hengyang, Hunan 421001, China
| | - Shi-Min Liu
- Department of Urology, The First Hospital Affiliated to Nanhua University, Hengyang, Hunan 421001, China
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Hu Y, Shen J, Liu R, Feng Z, Zhang C, Ling L, Chen L. Prognostic value of pretreatment prognostic nutritional index in non-small cell lung cancer: A systematic review and meta-analysis. Int J Biol Markers 2018; 33:372-378. [PMID: 30282502 DOI: 10.1177/1724600818799876] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
BACKGROUND: The pretreatment prognostic nutritional index has been considered a potential prognostic biomarker in patients with non-small cell lung cancer (NSCLC), but this remains controversial. Therefore, we performed a meta-analysis to systematically assess the prognostic value of the prognostic nutritional index in patients with NSCLC. METHODS: We systematically searched PubMed, EMBASE, Web of Science, and CNKI. The hazard ratios (HRs) with their corresponding 95% confidence intervals (CIs) were used to evaluate the link between the prognostic nutritional index and the oncological outcomes of patients with NSCLC, including overall survival, disease-free survival/recurrence-free survival, and progression-free survival. RESULTS: Fifteen studies were included in this meta-analysis. Twelve of these studies explored the association between the prognostic nutritional index and the overall survival of patients with NSCLC. Our pooled analysis indicated that a low prognostic nutritional index was significantly related to adverse overall survival (HR 1.61; 95% CI 1.44, 1.81; P < 0.001). Our results also showed that the prognostic nutritional index was a negative predictor for disease-free survival/recurrence-free survival, and progression-free survival in patients with NSCLC. CONCLUSION: Our meta-analysis demonstrated that there was a close association between the prognostic nutritional index value and prognosis in NSCLC patients and that the prognostic nutritional index may act as a useful prognostic biomarker in NSCLC patients.
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Affiliation(s)
- Yuanyuan Hu
- 1 Department of Endocrinology and Metabolism, Shenzhen Nanshan People's Hospital, ShenZhen, China
| | - Jie Shen
- 2 Department of Endocrinology and Metabolism, The Third Affiliated Hospital of Southern Medical University, GuangZhou, China
| | - RuiKe Liu
- 3 Department of Endocrinology and Metabolism, Dongguan Third People's Hospital, DongGuan, China
| | - ZhiMei Feng
- 4 Department of Endocrinology and Metabolism, The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People's Hospital, QingYuan, China
| | - ChangNing Zhang
- 1 Department of Endocrinology and Metabolism, Shenzhen Nanshan People's Hospital, ShenZhen, China
| | - Li Ling
- 1 Department of Endocrinology and Metabolism, Shenzhen Nanshan People's Hospital, ShenZhen, China
| | - LiBo Chen
- 1 Department of Endocrinology and Metabolism, Shenzhen Nanshan People's Hospital, ShenZhen, China
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Chen LB, Zheng HK, Zhang L, An Z, Wang XP, Shan RT, Zhang WQ. A single nucleotide polymorphism located in microRNA-499a causes loss of function resulting in increased expression of osbpl1a and reduced serum HDL level. Oncol Rep 2017; 38:3515-3521. [PMID: 29039586 DOI: 10.3892/or.2017.6016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2016] [Accepted: 05/30/2017] [Indexed: 01/11/2023] Open
Abstract
Atherosclerosis is the main pathological process that induces CVD (cardiovascular diseases), and the objective of our study was explore whether miR‑499a rs3746444 polymorphism was associated with the HDL level, one of the risk factors of atherosclerosis. Online public miRNA database was utilized to predict the miR‑499a target, and luciferase assay was conducted to confirm that miR‑499a targeted osbpl1a, then western blot analysis and real-time PCR were performed to verify miRNA-mRNA regulatory relationship between miR‑499a and osbpl1a. Based on results of bioinformatics algorithms, osbpl1a was predicted as a candidate target gene of miR‑499a, luciferase reporter was generated, and it was found that the luciferase activity of cells was substantial downregulated following co-transfection with wild osbpl1a 3'UTR and miR‑499a compared to that in scramble control, while the inhibitory effect of miR‑499a was abolished after transfection of mutant osbpl1a 3'UTR. Then, miRNA-mRNA regulatory relationship between miR‑499a and osbpl1a was detected, a concentration-dependent effect of miR‑499a on the miR‑499a expression was observed, and both osbpl1a mRNA and protein levels of cells transfected with miR‑449a (30 and 60 nM) or osbpl1a siRNA were markedly reduced, while notably improved subsequent to transfect with anti‑miR‑449a (30 and 60 nM) in comparison with NC groups, moreover, the inhibitory effect among 30 or 60 nM miR‑499a, osbpl1a siRNA was similar, the improved effect of 30 or 60 nM anti‑miR‑499a showed no significant change. The influence of rs3746444 A allele on expression level of miR‑499a represented a recessive pattern in high-grade group with a higher level of miR‑499a in AA group, and HDL level in AA group was significantly reduced related to those in AG and GG groups. This study validated that rs3746444 polymorphism influenced the expression of miR‑499a, its target gene, osbpl1a, and thereby associated with the HDL level, which makes it a potential factor involved in the mechanism of atherosclerosis.
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Affiliation(s)
- Li-Bo Chen
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
| | - Hai-Kuo Zheng
- Department of Cardiovascular Medicine, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
| | - Lei Zhang
- Department of Cardiovascular Medicine, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
| | - Zhe An
- Department of Cardiovascular Medicine, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
| | - Xin-Peng Wang
- Department of Cardiovascular Medicine, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
| | - Rui-Ting Shan
- Department of Cardiovascular Medicine, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
| | - Wen-Qi Zhang
- Department of Cardiovascular Medicine, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
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Abstract
Long noncoding RNAs (lncRNAs) have been identified as oncogenes or tumor suppressors that are involved in tumorigenesis and chemoresistance. LncRNA XIST expression is upregulated in several cancers, however, its biologic role in the development of the chemotherapy of human lung adenocarcinoma (LAD) has not been elucidated. This study aimed to observe the expression of LncRNA XIST in LAD and to evaluate its biologic role and clinical significance in the resistance of LAD cells to cisplatin. LncRNA XIST expression was markedly increased in cisplatin-resistant A549/DDP cells compared with parental A549 cells as shown by qRT-PCR. LncRNA XIST overexpression in A549 cells increased their chemosensitivity to cisplatin both in vitro and in vivo by protecting cells from apoptosis and promoting cell proliferation. By contrast, LncRNA XIST knockdown in A549/DDP cells decreased the chemoresistance. We revealed that XIST functioned as competing endogenous RNA to repress let-7i, which controlled its down-stream target BAG-1. We proposed that XIST was responsible for cisplatin resistance of LAD cells and XIST exerted its function through the let-7i/BAG-1 axis. Our findings suggested that lncRNA XIST may be a new marker of poor response to cisplatin and could be a potential therapeutic target for LAD chemotherapy.
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Affiliation(s)
- Jing Sun
- a Health Examination Center , China-Japan Union Hospital of Jilin University , Changchun , China
| | - Li-Ming Pan
- b The First Hospital of Jilin University , Changchun , China
| | - Li-Bo Chen
- c Department of Ultrasound , China-Japan Union Hospital of Jilin University , Changchun , China
| | - Yue Wang
- d Department of Thoracic Surgery , China-Japan Union Hospital of Jilin University , Changchun , China
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Xue YK, Tan J, Dou DW, Chen D, Chen LJ, Ren HP, Chen LB, Xiong XG, Zheng H. Effect of Kruppel-like factor 4 on Notch pathway in hepatic stellate cells. ACTA ACUST UNITED AC 2016; 36:811-816. [PMID: 27924515 DOI: 10.1007/s11596-016-1667-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 10/15/2016] [Indexed: 02/06/2023]
Abstract
The relationship between Kruppel-like factor 4 (KLF4) and the Notch pathway was determined to investigate the effect of KLF4 on the activation of hepatic stellate cells and underlying mechanisms. Fifty SPF BALB/c mice were randomly divided into two groups. A liver fibrosis model was established in 25 mice as the experimental group, and the remaining 25 mice served as controls. On the day 0, 7, 14, and 35, liver tissues were removed for immunofluorescent detection. The Notch pathway inhibitor DAPT was added to the primary original hepatic stellate cells, and KLF4 and Notch-associated factor expression was detected by qRT-PCR. Additionally, the hepatic stellate cell line LX-2 was used to establish control and experimental groups, and was cultured in vitro. LX-2 cells in the experimental groups were treated with DAPT and the Notch activator transforming growth factor-beta 1 separately, whereas those in the control group were given isotonic culture medium. After 48 h, KLF4 expression was examined by Western blotting. After transient transfection of LX-2 cells to increase KLF4, the expression of Notch factor was examined. Immunofluorescence analysis showed that, with the aggravation of liver fibrosis, the absorbance (A) values of KLF4 were decreased (day 0: 980.73±153.19; day 7: 1087.99±230.23; day 14: 390.95±93.56; day 35: 245.99±87.34). The expression of Notch pathway- related factors (Notch-1, Notch-2, and Jagged-1) in the hepatic stellate cell membrane was negatively correlated to KLF4 expression. With the increase of KLF4 expression, Notch-2 (0.73±0.13) and Jagged-1 (0.43±0.12) expression decreased, whereas Notch-1 level was not detectable. When the Notch pathway was inhibited, KLF4 levels generally increased (18.12±1.31). Our results indicate that KLF4 expression is negatively correlated to the Notch pathway in hepatic stellate cells, which may provide a reference for the treatment of hepatic fibrosis.
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Affiliation(s)
- Yin-Kai Xue
- Department of Emergency Surgery, Union Hospital, Tongji Medical College, Huazhong Univerfsity of Science and Technology, Wuhan, 430022, China
| | - Jun Tan
- Department of Emergency Surgery, Union Hospital, Tongji Medical College, Huazhong Univerfsity of Science and Technology, Wuhan, 430022, China
| | - Dong-Wei Dou
- Department of Emergency Surgery, Union Hospital, Tongji Medical College, Huazhong Univerfsity of Science and Technology, Wuhan, 430022, China
| | - Ding Chen
- Department of Emergency Surgery, Union Hospital, Tongji Medical College, Huazhong Univerfsity of Science and Technology, Wuhan, 430022, China
| | - Lu-Jia Chen
- Department of Emergency Surgery, Union Hospital, Tongji Medical College, Huazhong Univerfsity of Science and Technology, Wuhan, 430022, China
| | - Huan-Ping Ren
- Department of Emergency Surgery, Union Hospital, Tongji Medical College, Huazhong Univerfsity of Science and Technology, Wuhan, 430022, China
| | - Li-Bo Chen
- Department of Emergency Surgery, Union Hospital, Tongji Medical College, Huazhong Univerfsity of Science and Technology, Wuhan, 430022, China
| | - Xin-Gao Xiong
- Department of Emergency Surgery, Union Hospital, Tongji Medical College, Huazhong Univerfsity of Science and Technology, Wuhan, 430022, China.
| | - Hai Zheng
- Department of Emergency Surgery, Union Hospital, Tongji Medical College, Huazhong Univerfsity of Science and Technology, Wuhan, 430022, China.
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Sang HY, Jin YL, Zhang WQ, Chen LB. Downregulation of microRNA-637 Increases Risk of Hypoxia-Induced Pulmonary Hypertension by Modulating Expression of Cyclin Dependent Kinase 6 (CDK6) in Pulmonary Smooth Muscle Cells. Med Sci Monit 2016; 22:4066-4072. [PMID: 27794186 PMCID: PMC5091202 DOI: 10.12659/msm.897254] [Citation(s) in RCA: 16] [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: 11/09/2022] Open
Abstract
BACKGROUND The objective of this study was to investigate the molecular mechanism by which miR-637 interferes with the expression of CDK6, which contributes to the development of pulmonary hypertension (PH) with chronic obstructive pulmonary disease (COPD). MATERIAL AND METHODS We used an online miRNA database to identify CDK6 as a virtual target of miR-637, and validated the hypothesis using luciferase assay. Furthermore, we transfected SMCs with miR-637 mimics and inhibitor, and expression of CDK6 was determined using Western blot and real-time PCR. RESULTS In this study, we identified CDK6 as a target of miR-637 in smooth muscle cells (SMCs), and determined the expression of miR-637 in SMCs from PH patients with COPD and normal controls. We also identified the exact miR-637 binding site in the 3'UTR of CDK6 by using a luciferase reporter system. The mRNA and protein expression levels of CDK6 in SMCs from PH patients with COPD were clearly upregulated compared with the normal controls. Cells exposed to hypoxia also showed notably increased CKD6 mRNA and protein expression levels, and when treated with miR-637 or CDK6 siRNA, this increase in CKD6 expression was clearly attenuated. Additionally, cell viability and cell cycle analysis showed that hypoxia markedly increased viability of SMCs by causing an accumulation in S phase, which was relieved by the introduction of miR-637 or CDK6 siRNA. CONCLUSIONS Our study proved that the CDK6 gene is a target of miR-637, and demonstrated the regulatory association between miR-637 and CDK6, suggesting a possible therapeutic target for PH, especially in patients with COPD.
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Affiliation(s)
- Hai-Yan Sang
- Department of Cardiology, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China (mainland)
| | - Ying-Li Jin
- Department of Pharmacology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin, China (mainland)
| | - Wen-Qi Zhang
- Department of Cardiology, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China (mainland)
| | - Li-Bo Chen
- Department of Ultrasound, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China (mainland)
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Chen LJ, Cheng P, Xue YK, Chen LB. Rupture of a Choledochal Cyst in an Adult Female: A Rare Consequence of Blunt Abdominal Trauma. Chin Med J (Engl) 2016; 129:2394. [PMID: 27647205 PMCID: PMC5040032 DOI: 10.4103/0366-6999.190670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Affiliation(s)
- Lu-Jia Chen
- Department of Emergency Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, China
| | - Ping Cheng
- Department of Emergency Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, China
| | - Yin-Kai Xue
- Department of Emergency Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, China
| | - Li-Bo Chen
- Department of Emergency Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, China
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Zhao LN, Chen LB, Hao XH, Hu Z, Zhang J, Zhang CH. Floroquinone induces apoptosis and inhibits carcinoma growth in mouse tumor xenograft model of anaplastic thyroid cancer. BANGL J PHARMACOL 2016. [DOI: 10.3329/bjp.v11i3.26705] [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] [Indexed: 11/05/2022] Open
Abstract
<p class="Abstract">In the present study, effects of floroquinone on anaplastic thyroid cancer cell lines and mouse tumor xenografts were investigated. Increase in the concentration of floroquinone from 10 to 100 µM reduced the cell growth from 98 to 17% after 48 hours in HOTHC cells. Similarly, in FRO cells growth rate was found to be 96 and 21%, respectively at 10 and 100 µM concentra-tions of floroquinone. Western blot analysis showed a marked reduction in Bcl-2 expression and increased in Bax, caspase-3 and cleaved PARP expre-ssion in HOTHC cell lines on treatment with floroquinone. Floroquinone treatment of the HOTHC cells led to inhibition of the cobalt chloride-induced increase in the hypoxia-inducible factor 1α (HIF-1α) and vascular endothelial growth factor expression. In HOTHC cells, floroquinone treatment inhibited the tube formation and migration potential significantly compared to control cells. Treatment of the mouse bearing HOTHC tumor xenograft with 50 and 100 mg/kg doses of floroquinone alternatively for one month reduced the tumor volume to 48 and 17%, respectively compared to the control. Thus, floroquinone effectively inhibits growth of thyroid cancer and can be used for its treatment.</p><p><strong>Video Clip</strong>:</p><p><a href="https://www.youtube.com/v/sub0JQlrffc">Migration assay</a>: 1 min 09 sec</p><p> </p>
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Zhang WQ, Chen LB, Zhe AN, Liu GH, Zhang L, Wang YH, Shao YK, Liu YY. Gastroretentive Floating Microspheres of Carvedilol: Preparation, In Vitro and In Vivo Characterization. J BIOMATER TISS ENG 2016. [DOI: 10.1166/jbt.2016.1413] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Chen D, Song MQ, Liu YJ, Xue YK, Cheng P, Zheng H, Chen LB. Inhibition of complement C3 might rescue vascular hyporeactivity in a conscious hemorrhagic shock rat model. Microvasc Res 2015; 105:23-9. [PMID: 26687560 DOI: 10.1016/j.mvr.2015.12.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Revised: 12/08/2015] [Accepted: 12/08/2015] [Indexed: 11/26/2022]
Abstract
BACKGROUND Vascular hyporeactivity in severe hemorrhagic shock could induce refractory hypotension and is an important cause of death. The global acute inflammatory response induced in shock triggers the over-expression of reactive oxygen species, NO, ET1 and TNF-α, which play essential roles in the pathology of vascular hyporeactivity. This leads to a hypothesis that inhibition of the complement system, the mediator of the inflammatory cascade, might be a promising therapeutic exploration for vascular hyporeactivity. METHODS We use cobra venom factor (CVF) and the soluble form of CR1 (sCR1) which deplete or inhibit complement C3 respectively to examine its role in vascular hyporeactivity in a conscious hemorrhagic shock rat model. RESULTS We first confirmed the over-activation of C3 during shock and the down-regulation effects of CVF and sCR1 on C3. Then, both CVF and sCR1 could significantly mitigate the over-expression of serum NO, ET-1, TNF-α and reactive oxygen species. Finally, the vascular reactivity of superior mesenteric arteries (SMA) was examined in vitro, which confirmed the massive reduction of vascular reactivity in shock, which was significantly rescued by both CVF and sCR1. CONCLUSIONS Inhibition of C3 might improve the reactivity of SMA to norepinephrine during hemorrhagic shock possibly through the downregulation of NO, ET1, TNF-α and reactive oxygen radicals.
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Affiliation(s)
- Ding Chen
- Department of Emergency, Wuhan Union Hospital affiliated with Tongji Medical College, Huazhong University of Science and Technology, PR China.
| | - Meng-Qi Song
- Department of Emergency, Wuhan Union Hospital affiliated with Tongji Medical College, Huazhong University of Science and Technology, PR China.
| | - Yan-Jun Liu
- Department of Emergency, Wuhan Union Hospital affiliated with Tongji Medical College, Huazhong University of Science and Technology, PR China.
| | - Yin-Kai Xue
- Department of Emergency, Wuhan Union Hospital affiliated with Tongji Medical College, Huazhong University of Science and Technology, PR China.
| | - Ping Cheng
- Department of Emergency, Wuhan Union Hospital affiliated with Tongji Medical College, Huazhong University of Science and Technology, PR China.
| | - Hai Zheng
- Department of Emergency, Wuhan Union Hospital affiliated with Tongji Medical College, Huazhong University of Science and Technology, PR China.
| | - Li-Bo Chen
- Department of Emergency, Wuhan Union Hospital affiliated with Tongji Medical College, Huazhong University of Science and Technology, PR China.
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Li YC, Li CF, Chen LB, Li DD, Yang L, Jin JP, Zhang B. MicroRNA-766 targeting regulation of SOX6 expression promoted cell proliferation of human colorectal cancer. Onco Targets Ther 2015; 8:2981-8. [PMID: 26543373 PMCID: PMC4622090 DOI: 10.2147/ott.s89459] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
MicroRNAs (miRNAs) have emerged as important regulators of cancer-cell biological processes. Previous studies have shown that miR-766 plays an important role in a variety of biological processes in various human cancers. However, the underlying mechanism of miR-766 in colorectal cancer (CRC) cells remains unclear. In this study, we investigated miR-766’s role in CRC cell proliferation. Polymerase chain reaction results showed that miR-766 expression was significantly upregulated in CRC tissues and cells. Ectopic expression of miR-766 promoted cell growth and anchorage-independent growth in CRC cells. Bioinformatic analysis predicted SOX6, a potential target of miR-766, acting as a tumor suppressor. Luciferase reporter assay results demonstrated that miR-766 directly bound to the 3′-untranslated region of SOX6. Overexpression of miR-766 suppressed SOX6 expression, resulting in the downregulation of p21 and upregulation of cyclin D1. In a further experiment, SOX6-silenced SW480 cells transfected with miR-766 promoted cell growth, suggesting that downregulation of SOX6 was required for miR-766-induced CRC cell proliferation. Taken together, these results suggested that miR-766 represents an onco-miRNA and participates in the development of CRC by modulating SOX6 expression.
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Affiliation(s)
- Yong-Chao Li
- Department of Gastrointestinal Surgery, China-Japan Union Hospital of Jilin University, Changchun, People's Republic of China
| | - Chang-Feng Li
- Department of Endoscopy Center, China-Japan Union Hospital of Jilin University, Changchun, People's Republic of China
| | - Li-Bo Chen
- Department of Endoscopy Center, China-Japan Union Hospital of Jilin University, Changchun, People's Republic of China
| | - Dan-Dan Li
- Department of Endoscopy Center, China-Japan Union Hospital of Jilin University, Changchun, People's Republic of China
| | - Lei Yang
- Department of Endoscopy Center, China-Japan Union Hospital of Jilin University, Changchun, People's Republic of China
| | - Jing-Peng Jin
- Department of Endoscopy Center, China-Japan Union Hospital of Jilin University, Changchun, People's Republic of China
| | - Bin Zhang
- Department of Endoscopy Center, China-Japan Union Hospital of Jilin University, Changchun, People's Republic of China
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Li CF, Chen LB, Li DD, Yang L, Zhang BG, Jin JP, Zhang Y, Zhang B. Dual‑sensitive HRE/Egr1 promoter regulates Smac overexpression and enhances radiation‑induced A549 human lung adenocarcinoma cell death under hypoxia. Mol Med Rep 2014; 10:1108-16. [PMID: 24842518 DOI: 10.3892/mmr.2014.2233] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Accepted: 04/04/2014] [Indexed: 11/05/2022] Open
Abstract
The aim of this study was to construct an expression vector carrying the hypoxia/radiation dual‑sensitive chimeric hypoxia response element (HRE)/early growth response 1 (Egr‑1) promoter in order to overexpress the therapeutic second mitochondria‑derived activator of caspases (Smac). Using this expression vector, the present study aimed to explore the molecular mechanism underlying radiotherapy‑induced A549 human lung adenocarcinoma cell death and apoptosis under hypoxia. The plasmids, pcDNA3.1‑Egr1‑Smac (pE‑Smac) and pcDNA3.1‑HRE/Egr-1‑Smac (pH/E‑Smac), were constructed and transfected into A549 human lung adenocarcinoma cells using the liposome method. CoCl2 was used to chemically simulate hypoxia, followed by the administration of 2 Gy X‑ray irradiation. An MTT assay was performed to detect cell proliferation and an Annexin V‑fluorescein isothiocyanate apoptosis detection kit was used to detect apoptosis. Quantitative polymerase chain reaction and western blot analyses were used for the detection of mRNA and protein expression, respectively. Infection with the pE‑Smac and pH/E‑Smac plasmids in combination with radiation and/or hypoxia was observed to enhance the expression of Smac. Furthermore, Smac overexpression was found to enhance the radiation‑induced inhibition of cell proliferation and promotion of cycle arrest and apoptosis. The cytochrome c/caspase‑9/caspase‑3 pathway was identified to be involved in this regulation of apoptosis. Plasmid infection in combination with X‑ray irradiation was found to markedly induce cell death under hypoxia. In conclusion, the hypoxia/radiation dual‑sensitive chimeric HRE/Egr‑1 promoter was observed to enhance the expression of the therapeutic Smac, as well as enhance the radiation‑induced inhibition of cell proliferation and promotion of cycle arrest and apoptosis under hypoxia. This apoptosis was found to involve the mitochondrial pathway.
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Affiliation(s)
- Chang-Feng Li
- Endoscopy Center, China‑Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
| | - Li-Bo Chen
- Endoscopy Center, China‑Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
| | - Dan-Dan Li
- Endoscopy Center, China‑Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
| | - Lei Yang
- Endoscopy Center, China‑Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
| | - Bao-Gang Zhang
- Endoscopy Center, China‑Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
| | - Jing-Peng Jin
- Endoscopy Center, China‑Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
| | - Ying Zhang
- Endoscopy Center, China‑Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
| | - Bin Zhang
- Endoscopy Center, China‑Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
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Bao YY, Qu LY, Zhao D, Chen LB, Jin HY, Xu LM, Cheng JA, Zhang CX. The genome- and transcriptome-wide analysis of innate immunity in the brown planthopper, Nilaparvata lugens. BMC Genomics 2013; 14:160. [PMID: 23497397 PMCID: PMC3616906 DOI: 10.1186/1471-2164-14-160] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [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: 08/27/2012] [Accepted: 02/28/2013] [Indexed: 12/04/2022] Open
Abstract
Background The brown planthopper (Nilaparvata lugens) is one of the most serious rice plant pests in Asia. N. lugens causes extensive rice damage by sucking rice phloem sap, which results in stunted plant growth and the transmission of plant viruses. Despite the importance of this insect pest, little is known about the immunological mechanisms occurring in this hemimetabolous insect species. Results In this study, we performed a genome- and transcriptome-wide analysis aiming at the immune-related genes. The transcriptome datasets include the N. lugens intestine, the developmental stage, wing formation, and sex-specific expression information that provided useful gene expression sequence data for the genome-wide analysis. As a result, we identified a large number of genes encoding N. lugens pattern recognition proteins, modulation proteins in the prophenoloxidase (proPO) activating cascade, immune effectors, and the signal transduction molecules involved in the immune pathways, including the Toll, Immune deficiency (Imd) and Janus kinase signal transducers and activators of transcription (JAK-STAT) pathways. The genome scale analysis revealed detailed information of the gene structure, distribution and transcription orientations in scaffolds. A comparison of the genome-available hemimetabolous and metabolous insect species indicate the differences in the immune-related gene constitution. We investigated the gene expression profiles with regards to how they responded to bacterial infections and tissue, as well as development and sex expression specificity. Conclusions The genome- and transcriptome-wide analysis of immune-related genes including pattern recognition and modulation molecules, immune effectors, and the signal transduction molecules involved in the immune pathways is an important step in determining the overall architecture and functional network of the immune components in N. lugens. Our findings provide the comprehensive gene sequence resource and expression profiles of the immune-related genes of N. lugens, which could facilitate the understanding of the innate immune mechanisms in the hemimetabolous insect species. These data give insight into clarifying the potential functional roles of the immune-related genes involved in the biological processes of development, reproduction, and virus transmission in N. lugens.
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Affiliation(s)
- Yan-Yuan Bao
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Agricultural Entomology, Institute of Insect Sciences, Zhejiang University, Hangzhou, 310058, China
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Bao YY, Chen LB, Wu WJ, Zhao D, Wang Y, Qin X, Zhang CX. Direct interactions between bidensovirus BmDNV-Z proteins and midgut proteins from the virus target Bombyx mori. FEBS J 2013; 280:939-49. [PMID: 23216561 DOI: 10.1111/febs.12088] [Citation(s) in RCA: 6] [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: 09/29/2012] [Revised: 12/01/2012] [Accepted: 12/03/2012] [Indexed: 11/26/2022]
Abstract
In this study we aimed to identify the protein-protein interactions between Bombyx mori midgut and the bidensovirus BmDNV-Z via a yeast two-hybrid (Y2H) system. To achieve this we constructed a Gal4 activation domain fusion library that expresses the host genes and Gal4 DNA binding domain fusion bait vectors that express BmDNV-Z genes. Y2H assay revealed 15 potential interactions between host and viral proteins. To verify the interactions, we modified and reconstructed a pair of bimolecular fluorescence complementation (BiFC) vectors and achieved the co-expressions of the candidate host genes and viral genes in insect culture cells. The BiFC assay confirmed the specificity of the interactions including B. mori 35 kDa protease and two BmDNV-Z proteins encoded by VD1-ORF2 and VD2-ORF1; B. mori transgelin and BmDNV-Z protein encoded by VD2-ORF3; and B. mori serine protease precursor and BmDNV-Z encoded by VD2-ORF3 in vitro. Our findings revealed that the specific host midgut proteins are involved in the interactions between B. mori and BmDNV-Z, which will facilitate our understanding of the molecular mechanisms of BmDNV-Z infection.
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Affiliation(s)
- Yan-Yuan Bao
- Ministry of Agriculture Key Laboratory of Agricultural Entomology, Institute of Insect Sciences, Zhejiang University, Hangzhou, China
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Xue LQ, Han B, Chen LB, Pan CM, Zhu H, Liu BL, Liu W, Wu WL, Chen MD, Lu YL, Qiao J, Song HD. Identification of a novel mutation in CYP17A1 gene. Transl Res 2013; 161:44-9. [PMID: 23036723 DOI: 10.1016/j.trsl.2012.08.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2012] [Revised: 08/10/2012] [Accepted: 08/30/2012] [Indexed: 10/27/2022]
Abstract
17α-hydroxylase/17,20-lyase deficiency (17OHD) is a rare autosomal recessive genetic disease that is characterized by low-renin hypertension, hypokalemia, and abnormal development of the genitalia. Mutations in the CYP17A1 gene account for this disease. We aim to investigate the CYP17A1 mutation and analyze its possible influence on phenotype in a Chinese patient with 17OHD. Steroid hormones were assayed. The 8 exons of the CYP17A1 gene were amplified and directly sequenced. Wild-type and mutant CYP17A1 cDNA were cloned into pcDNA3.1 expression vectors and transfected into 293T cells. Finally, 17-hydroxylase and 17,20-lyase activity were detected by using progesterone and 17-hydroxypregnenolone as the substrates. A novel missense mutation c.716 G>A located in exon 4 that changed the amino acid from arginine to glutamine (R239Q) was discovered in the patient. Steric model analysis of CYP17A1 showed that R239Q changed the local structure and the electrostatic potential. Functional study indicated that the R239Q mutant caused the complete loss of both 17α-hydroxylase and 17,20-lyase activities. Our study expanded the CYP17A1 mutation spectrum. With a functional study, we confirmed that the novel mutation caused the complete loss of both 17α-hydroxylase and 17,20-lyase activities.
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Affiliation(s)
- Li-Qiong Xue
- State Key Laboratory of Medical Genomics, Molecular Medical Centre, Shanghai Institute of Endocrinology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, China
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Li WJ, Zhang B, Huang GW, Kang GP, Liang MZ, Chen LB. Chloroplast DNA polymorphism and evolutional relationships between Asian cultivated rice (Oryza sativa) and its wild relatives (O. rufipogon). Genet Mol Res 2012; 11:4418-31. [PMID: 23096910 DOI: 10.4238/2012.october.9.8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We analyzed chloroplast DNA (cpDNA) polymorphism and phylogenic relationships between 6 typical indica rice, 4 japonica rice, 8 javanica rice, and 12 Asian common wild rice (Oryza rufipogon) strains collected from different latitudes in China by comparing polymorphism at 9 highly variable regions. One hundred and forty-four polymorphic bases were detected. The O. rufipogon samples had 117 polymorphic bases, showing rich genetic diversity. One hundred and thirty-one bases at 13 sites were identified with indica/japonica characteristics; they showed differences between the indica and japonica subspecies at these sites. The javanica strains and japonica shared similar bases at these 131 polymorphic sites, suggesting that javanica is closely related to japonica. On the basis of length analyses of the open reading frame (ORF)100 and (ORF)29-tRNA-Cys(GCA) (TrnC(GCA)) fragments, the O. rufipogon strains were classified into indica/japonica subgroups, which was consistent with the results of the phylogenic tree assay based on concatenated datasets. These results indicated that differences in indica and japonica also exist in the cpDNA genome of the O. rufipogon strains. However, these differences demonstrated a certain degree of primitiveness and incompleteness, as an O. rufipogon line may show different indica/ japonica attributes at different sites. Consequently, O. rufipogon cannot be simply classified into the indica/japonica types as O. sativa. Our data support the hypothesis that Asian cultivated rice, O. indica and O. japonica, separately evolved from Asian common wild rice (O. rufipogon) strains, which have different indica-japonica differentiation trends.
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Affiliation(s)
- W J Li
- College of Life Science, Hunan Normal University, Changsha, Hunan, China
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Chen LB, Shi P, Zheng CH, Gu YJ. Generation of three-dimensional entangled state between a single atom and a Bose-Einstein condensate via adiabatic passage. Opt Express 2012; 20:14547-14555. [PMID: 22714516 DOI: 10.1364/oe.20.014547] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Inspired by a recently experiment by M. Lettner et al. [Phys. Rev. Lett. 106, 210503 (2011)], we propose a robust scheme to prepare three-dimensional entanglement state between a single atom and a Bose-Einstein condensate (BEC) via stimulated Raman adiabatic passage (STIRAP) technique. The atomic spontaneous radiation, the cavity decay, and the fiber loss are efficiently suppressed by the engineering adiabatic passage. Our strictly numerical simulation shows our proposal is good enough to demonstrate the generation of three-dimensional entanglement with high fidelity and within the current experimental technology.
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Affiliation(s)
- Li-Bo Chen
- Department of Physics, Ocean University of China, Qingdao 266100, China
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Chen LB, Yin XM, Mei L, Li CC, Lei DN, Zhang M, Li QH, Xu Z, Xu CM, Wang TH. Mesoporous SnO2@carbon core-shell nanostructures with superior electrochemical performance for lithium ion batteries. Nanotechnology 2012; 23:035402. [PMID: 22173372 DOI: 10.1088/0957-4484/23/3/035402] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
SnO2@carbon nanostructure composites are prepared by a simple hydrothermal method. The composite exhibits unique structure, which consists of a mesoporous SnO2 core assembled of very small nanoparticles and a carbon shell with 10 nm thickness. The mesoporous SnO2@carbon core-shell nanostructures manifest superior electrochemical performance as an anode material for lithium ion batteries. The reversible specific capacity of the composite is about 908 mAh g(-1) for the first cycle and it can retain about 680 mAh g(-1) after 40 charge/discharge cycles at a current density of 0.3 C. Moreover, it shows excellent rate capability even at the high rate of 4.5 C. The enhanced performance was attributed to the mesoporous structure and a suitable carbon coating.
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Affiliation(s)
- L B Chen
- Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education and State Key Laboratory for Chemo/Biosensing and Chemometrics, Hunan University, Changsha, Hunan 410082, People's Republic of China
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You FP, Song MQ, Chen LB. Down-regulation of microRNA-145 ablates c-Myc inhibition and promotes hepatoma progression. Shijie Huaren Xiaohua Zazhi 2011; 19:1411-1416. [DOI: 10.11569/wcjd.v19.i13.1411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate whether microRNA-145 (miR-145) controls hepatoma progression through modulating c-Myc activity.
METHODS: Quantitative real-time PCR was used to detect miR-145 expression in different liver lesions and cell lines. Quantitative real-time PCR and Western blot were adopted to detect the expression of c-Myc mRNA and protein in different liver lesions, respectively. After transfection of HepG2 cells with an miR-145 mimic, quantitative real-time PCR, Western blot and flow cytometry were used to detect the expression of c-Myc mRNA and protein and cell apoptosis, respectively.
RESULTS: MiR-145 mRNA was underexpressed in hepatocellular carcinoma (HCC) and tumor-adjacent tissue compared to normal liver tissue (0.878 ± 0.146 vs 0.265 ± 0.084, 0.271 ± 0.096, both P < 0.05). MiR-145 mRNA was also underexpressed in HepG2 cells compared to L-02 cells (0.755 ± 0.185 vs 0.471 ± 0.074, P < 0.05). C-Myc mRNA and protein were overexpressed in HCC and tumor-adjacent tissue compared to normal liver tissue (mRNA: 0.136 ± 0.071, 0.451 ± 0.026 vs 0.029 ± 0.023; protein: 0.301 ± 0.022, 0.445 ± 0.018 vs 0.137 ± 0.011; all P < 0.05). C-Myc protein expression was down-regulated in HepG2 cells transfected with an miR-145 mimic compared to cells transfected with empty vector and untransfected cells (0.146 ± 0.011 vs 0.366 ± 0.014, 0.350 ± 0.013, both P < 0.05). Transfection of an miR-145 mimic promoted the apoptosis of HepG2 cells compared to cells transfected with empty vector and untransfected cells (3.000 ± 0.100 vs 1.167 ± 0.153, 0.933 ± 0.208, both P < 0.05).
CONCLUSION: MiR-145 down-regulation-mediated ablation of inhibition of c-Myc may be a major cause of hepatocarcinogenesis. MiR-145 can promote cell apoptosis.
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Zhang YW, Miao YF, Yi J, Geng J, Wang R, Chen LB. Transcriptional inactivation of secreted frizzled-related protein 1 by promoter hypermethylation as a potential biomarker for non-small cell lung cancer. Neoplasma 2010; 57:228-33. [PMID: 20353273 DOI: 10.4149/neo_2010_03_228] [Citation(s) in RCA: 33] [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: 01/12/2023]
Abstract
Epigenetic silencing of secreted frizzled-related protein (SFRP) genes, antagonists of the WNT pathway, contributes to the pathogenesis of several cancers including non-small cell lung cancer (NSCLC). We hypothesize that methylation analysis of SFRPs family could improve their use as a panel of biomarkers for diagnosing and staging of NSCLC in China. The expression of four SFRP members (SFRP1, 2, 4, and 5) in NSCLC samples was screened by RT-PCR and quantitative real-time PCR. Only SFRP1 was significantly downregulated in NSCLC, as compared to adjacent normal tissues and benign pulmonary disease tissues (P=0.006). Promoter hypermethylation of SFRP1 was found in 32.1% (25/78) NSCLC specimens and was closely correlated with loss of expression, besides SFRP1 hypermethylation was associated with lymph metastasis (P=0.039) and disease progression within one year (P=0.027). Furthermore, methylated SFRP1 was detected in 28.2% (22/78) of plasma samples from NSCLC patients while only 4% (2/50) in cancer-free controls, and the concordance of SFRP1 methylation status in tumor tissues and corresponding plasmas was satisfactory (P <0.001). In conclusion, epigenetic inactivation of SFRP1 is a common event contributing to lung carcinogenesis and maybe used as a potential biomarker for NSCLC in Chinese population.
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Affiliation(s)
- Y W Zhang
- Department of Medical Oncology, Jinling Hospital, School of Medicine, Nanjing University, China
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Wang DD, Jiang H, Zhao WY, Song MQ, You FP, Yang YF, Chen LB, Yang L. Correlation between microRNA-377 and histone methyltransferase SMYD3 expression in hepatocellular carcinoma. Shijie Huaren Xiaohua Zazhi 2010; 18:1902-1906. [DOI: 10.11569/wcjd.v18.i18.1902] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the expression of microRNA-377 (miR-377) and histone methyltransferase SMYD3 in hepatocellular carcinoma (HCC) and to analyze their correlation.METHODS: Quantitative real-time PCR was performed to detect miR-377 expression in different liver tissues and cell lines. Quantitative real-time PCR and Western blot were employed to detect the expression of SMYD3 (a target gene of miR-377) mRNA and protein, respectively. After transfection of HepG2 cells with a miR-377 mimic, quantitative real-time PCR and Western blot were used to detect the expression of SMYD3 mRNA and protein, respectively.
RESULTS: MiR-377 mRNA was underexpressed in HCC and tumor-adjacent tissue compared to normal liver tissue (0.331 ± 0.059 and 0.139 ± 0.064 vs 0.874 ± 0.178, both P < 0.05). MiR-377 mRNA was also underexpressed in HepG2 cells compared to L-02 cells (0.145 ± 0.021 vs 0.868 ± 0.194, P < 0.05). SMYD3 mRNA and protein were overexpressed in HCC and tumor-adjacent tissue compared to normal liver tissue (mRNA: 3.836 ± 0.137 and 5.836 ± 0.965 vs 1.235 ± 0.332, both P < 0.05; protein: 0.381 ± 0.020 and 0.484 ± 0.030 vs 0.252 ± 0.015, both P < 0.05). SMYD3 mRNA and protein were overexpressed in HepG2 cells compared to L-02 cells (mRNA: 0.845 ± 0.047 vs 0.348 ± 0.134, P < 0.05; protein: 0.575 ± 0.008 vs 0.259 ± 0.007, P < 0.05). SMYD3 mRNA and protein expression in HepG2 cells was down-regulated after transfection of an miR-377 mimic (mimic vs empty control & negative control: mRNA, 0.125 ± 0.010 vs 0.857 ± 0.1635 and 0.779 ± 0.167; protein, 0.092 ± 0.026 vs 0.347 ± 0.040 and 0.383±0.054; all P < 0.05).
CONCLUSION: miR-377 is down-regulated and its target gene SMYD3 is overexpressed in HCC, which suggests that miR-377 down-regulation promotes the carcinogenesis of hepatocellular carcinoma by up-regulating SMYD3 expression.
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Ren WB, Zhang YW, Deng B, Xu Z, Chen LB. [Comparative analysis of alfalfa seeds between space flight mutation and its control by Raman spectroscopy]. Guang Pu Xue Yu Guang Pu Fen Xi 2010; 30:988-990. [PMID: 20545146] [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] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
To realize the effect of space flight factors on chemical component of alfalfa seeds and its possible mechanism, seeds were loaded onto satellite "Jianbing No. 1" in 2006 for 14 days' space flight and then analyzed by Raman spectroscopy. Results showed that the intensity of two peaks (358 and 553 cm(-1)) of space flight seeds had been increased and the intensity of four peaks (814, 1 122, 1 531 and 1 743 cm(-1)) of space flight seeds had been decreased compared with its ground control. Based on the classification of Raman spectra, the increased peaks of 358 and 553 cm(-1) are related to DNA and Ca2+ respectively, which mean that the content of DNA and Ca2+ of alfalfa seeds had increased after space flight. The decreased peaks of 814, 1 122 and 1 743 cm(-1) are related to saccharide and fatty acid respectively, which mean that the content of reserve energy of alfalfa seeds had decreased after space flight. These findings can be explained as follows: (1) The increase in the content of DNA may be explained by the DNA damage induced by space flight factors and DNA syntheses and duplication before the cell division. (2) The increase in the content of Ca2+ may be stimulated by the complexity of gravity during the space flight, especially the hypergravity. Recent researches in Abrabidopsis thaliana have provided additional proof. (3) The decrease of the energy materials such as saccharide and fatty acid may be explained by the consumption both during the repair process of DNA damage induced by cosmic radiation and during the germination of seeds because the dormancy of alfalfa seeds had been broken up by space flight factors (cosmic radiation, microgravity, vibration or others) which subsequently resulted in that nutritious materials of alfalfa seeds were used earlier than its ground control.
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Affiliation(s)
- Wei-Bo Ren
- Grassland Research Institute of Chinese Academy of Agricultural Sciences, Huhhot 010010, China.
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Ma ZL, Yang L, Chen LB, Huang JM, Wang DD, Wang GB. Differential expression profile of microRNAs in the different stages of hepatitis B virus infection-related hepatocarcinogenesis. Shijie Huaren Xiaohua Zazhi 2009; 17:2112-2116. [DOI: 10.11569/wcjd.v17.i20.2112] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the differential expression profile of microRNAs in the different stages of hepatitis B virus (HBV) infection-related hepatocarcinogenesis.
METHODS: MicroRNA microarray was used to detect the differential expression profile of microRNAs in the liver tissue taken from healthy controls as well as patients with HBV-induced cirrhosis or HBV-related hepatocellular carcinoma. Real-time quantitative PCR was performed to verify the differential expression of candidate microRNAs obtained from microarray experiment.
RESULTS: Compared with normal liver tissue, six microRNAs (hsa-miR-602, hsa-miR-129-5p, has-miR-210, hsa-miR-671-5p, hsa-miR-30b*, and hsa-miR-572) were upregulated more than two-fold, and eight microRNAs (hsa-miR-143, hsa-miR-199a-5p, has-miR-195, hsa-miR-27a, hsa-miR-99a, hsa-miR-519e, has-miR -130a and hsa-miR-597) were downregulated in the liver tissue taken from patients with HBV-induced cirrhosis or HBV-related hepatocellular carcinoma. Though these identified microRNAs showed significant differential expression between normal liver tissue and HBV-related hepatocellular carcinoma tissue and cirrhotic tissue, they exhibited no significant differential expression between HBV-related hepatocellular carcinoma tissue and cirrhotic tissue.
CONCLUSION: HBV-related hepatocarcinogenesis is associated with the change in the expression profile of microRNAs.
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Wang YN, Kong LY, Zhang ZH, Chen LB, Song L, Zhang SY, Miao Q, Jin ZY. [Diagnostic value of dual-source CT coronary angiography on the detection of coronary artery disease with myocardial perfusion defect]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 2009; 31:160-165. [PMID: 19507593] [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] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
OBJECTIVE To determine the accuracy of dual-source CT (DSCT) coronary angiography (CAG) for the diagnosis of coronary artery disease (CAD) that induces perfusion defects at myocardial perfusion imaging (MPI) with single photon emission computed tomography (SPECT), by using SPECT and conventional CAG as the reference standard. METHODS Thirty-five patients with suspected or known CAD underwent both DSCT coronary angiography and MPI (using exercise or adenosine stress-rest protocol) with technetium-99m sestamibi SPECT. All the patients were beta-blockers-naïve before DSCT scan. The DSCT CAG studies were classified as having no stenosis, non-obstructive (< 50% luminal narrowing) stenosis, or obstructive (> or = 50% luminal narrowing) stenosis. MPI examinations were classified as showing normal or abnormal (reversible and/or fixed defects). A comparative regional analysis of coronary stenosis on DSCT versus myocardial perfusion on SPECT was made. In a subset of 20 patients, CAG was performed as a reference standard for CT angiography. RESULTS On the basis of the DSCT data, 98.4% of coronary segments were assessable. Twenty-seven branches were classified as having no stenosis, among which 85% had normal MPI. Nine branches showed non-obstructive stenosis and 69 branches showed at least one obstructive lesion. Only 50 (64%) branches with an abnormal DSCT had abnormal MPI; even in branches with obstructive stenosis on DSCT, 23 (33%) still had a normal MPI. By receiver operating characteristic curve analysis, at the optimal cutoff value of 58% stenosis, the sensitivity and specificity of DSCT to detect myocardial perfusion defect as defined by SPECT were 85% and 65%. In the subgroup compared with CAG, the sensitivity and specificity of DSCT to identify obstructive stenosis were 93% and 96%. CONCLUSIONS DSCT and SPECT provide mutually complementary information on CAD. CT angiography can help rule out functionally relevant CAD, but has poor capability in predicting ischemia. DSCT provides high-quality diagnostic image without heartbeat controlling and has a high accuracy in detecting obstructive stenosis.
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Affiliation(s)
- Yi-Ning Wang
- Department of Radiology, PUMC Hospital, CAMS and PUMC, Beijing 100730, China
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Abstract
A new approach to the fabrication of magnetic thermosensitive microcontainers of Fe(3)O(4) nanoparticles with poly(N-isopropylacrylamide) walls is presented. The microcontainers undergo a temperature-induced volume phase transition and present an impressive magnetic response. The microcontainers have a well-defined structure with a narrow size distribution. The wall thicknesses of the microcontainers can be controlled according to requirements. Compared to other preparation methods, the process is simple and reproducible. The magnetic saturation of these microcontainers is high enough to meet most requirements of bioapplications. To further investigate the potential application of these microcontainers, they are tested as drug carriers, with the drug loading and releasing processes carefully studied. The drug encapsulation efficiency and drug content in the carriers are pH-dependent, and the carriers have a maximal drug loading of about 50 wt% under alkaline conditions. The release of the drug from the microcontainers can be controlled by the environmental pH, temperature, and magnetic force.
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Affiliation(s)
- Li-Bo Chen
- Department of Macromolecular Science, Key Laboratory of Molecular Engineering of Polymers, Ministry of Education, Fudan University, Shanghai, China
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Lin SB, Zhang ZH, Li DJ, Zhang SY, Chen LB, Feng F, Jin ZY. [Comparison of imaging characteristics of magnetic resonance myocardial delayed enhancement between ischemic and nonischemic myocardial diseases]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 2009; 31:84-87. [PMID: 19317068] [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] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
OBJECTIVE To compare the imaging characteristics of magnetic resonance (MR) delayed enhancement between ischemic and nonischemic myocardial diseases. METHODS We retrospectively analyzed the imaging and clinical characteristics of 25 patients who had MR delayed enhancement. RESULTS Among the 25 cases, 19 cases were ischemic heart diseases, in which the delayed enhancement was subendocardium, non-transmural or transmural; two cases were hypertrophic cardiomyopathy, in which the delayed enhancement was midwall in the hypertrophic myocardium, strip- and patch-shaped; one case was dilated cardiomyopathy, in which the delayed enhancement was diffuse small midwall spots two cases was restrictive cardiomyopathy, in which the delayed enhancement was located in the area of the subendocardium both of the right and left ventricles; and one case was a mass of the lateral wall of the left ventricle, in which the delayed enhancement with a clumpy shape was shown. CONCLUSIONS MR myocardial delayed enhancement is not a specific sign of myocardial infarction of ischeminc heart disease. The differentiation of the etiology of the delayed enhancement relies upon both the MR images and the clinical history.
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Affiliation(s)
- Song-Bai Lin
- Special Medical Care Center, PUMC Hospital, CAMS and PUMC, Beijing 100730, China
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Abstract
AIM: To evaluate correlation between histone methyltransferase SMYD3 expression in hepatoma and HBV infection.
METHODS: SMYD3 mRNA expressions and SMYD3 protein expression levels in HBV-negative HepG2 and HBV-positive hepatoma cell line HepG2.2.15 were determined using real time PCR and Western blot, respectively.
RESULTS: SMYD3 mRNA and protein levels were significantly higher in HepG2.2.15 than those in HepG2 (0.92 ± 0.12 vs 0.18 ± 0.05, 0.28 ± 0.03 vs 0.54 ± 0.05, both P < 0.01).
CONCLUSION: HBV may promote hepatoma cell malignancy through its SMYD3 up-regulating pathways.
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Chen LB, Yang L, Wang GB. Operational options based on scoring system to treat upper gastrointestinal bleeding due to portal hypertension. Shijie Huaren Xiaohua Zazhi 2008; 16:1942-1945. [DOI: 10.11569/wcjd.v16.i17.1942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To guide operation in treating upper gastrointestinal bleeding due to portal hypertension through building a scoring system.
METHODS: One hundred and seventy-eight patients with portal hypertension were admitted to our hospital from June 2004 to October 2007. The patients were scored according to the etiology, age, liver function, clinical characteristics, and operation history, and corresponding operations were selected based on the scores for the treatment of upper gastrointestinal bleeding due to portal hypertension.
RESULTS: Based on the scores, pericardial devascularisation was performed in 89 cases; lower esophageal transection plus reanastomosis was performed in 22 patients; trans-chest esophageal transection plus reanastomosis was performed in 2 patients; proximal splenorenal shunt was performed in 39 cases; restricted SMV-cava shunt was performed in 21 cases; lateral-lateral portal-cava shunt was performed in 5 cases. Peri-operational complications included reversed ascites (41 cases), plural effusion (8 cases), esophageal leakage (1 case), and esophageal stricture (1 case). Ninety-nine cases were followed up, and 16 were found with occasional black stool. Re-hematemesis occurred in 1 case and he died finally. Reversible hepatic encephalopathy occurred in 2 cases, and incisional hernia occurred in 1 case.
CONCLUSION: Operational selection based on scoring system can improve the operation effect and decrease complications in treating upper gastrointestinal bleeding due to portal hypertension.
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Luo Q, Luo QY, Sheng SW, Chen LB, Yu YL, Lu HK, Zhu RS. Localization of concomitant metastases to kidney and erector spinae from papillary thyroid carcinoma using (131)I-SPECT and CT. Thyroid 2008; 18:663-4. [PMID: 18578619 DOI: 10.1089/thy.2007.0326] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Liu X, Chen LB, Ye J, Jiang J, Xu JY, Qian W, 钱 伟. Effects of shRNA-induced SMYD3 silence on c-Myc expression and apoptosis of HepG2 cells. Shijie Huaren Xiaohua Zazhi 2008; 16:1373-1377. [DOI: 10.11569/wcjd.v16.i13.1373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To observe the c-Myc gene expression and apoptosis of HepG2 cells after SET and MYND-domain containing 3 (SMYD3) silence induced by short hairpin RNA.
METHODS: Three short hairpin RNA interference plasmids targeting SMYD3 were prepared as 3 groups: Pgenesil-1-s1 (with interfering effect), Pgenesil-1-s2 (with interfering effect), and Pgenesil-1-hk (negative control plasmid, without interfering effect). Meanwhile, an empty control group was also designed. Transfection was performed using the Lipofectmine2000 liposome. Reverse transcription-polymerase chain reaction (RT-PCR) was employed to detect the expression of SMYD3 and c-Myc gene 24, 48 and 72 h after transfection. Flow cytometry (FCM) was used to detect cell apoptosis in each group.
RESULTS: SMYD3 and c-Myc gene were strongly expressed in HepG2 cells. The expression of SMYD3 gene was significantly inhibited after 24-, 48- and 72-h transfection (F = 67.46, P < 0.01; F = 176.79, P < 0.01; F = 175.28, P < 0.01). At the same time, c-Myc gene mRNA expression was down-regulated in the Pgenesil-1 transfected group as compared with that in the Pgenesil-1-hk group (F = 11.58, P = 0.009; F = 126.41, P < 0.01; F = 261.25, P < 0.01). Moreover, the early apoptosis rate was significantly higher in the Pgenesil-1-s1 or Pgenesil-1-s2 group than that in the Pgenesil-1-hk group (LSD-t = -13.58, -12.62; both P < 0.01) and the empty control group (LSD-t = -18.62, -17.67; P < 0.01).
CONCLUSION: Short hairpin RNA interference targeting SMYD3 may inhibit the expression of c-Myc gene in HepG2 cells, thus promoting the apoptosis of HepG2 cells.
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Abstract
AIM: To summarize the clinical and spiral CT characteristics of primary sarcomatoid hepatic carcinoma in order to improve its diagnosis.
METHODS: CT findings of 8 patients with primary sarcomatoid hepatic carcinoma were analyzed retrospectively. Plain and enhanced spiral CT scan was performed for all patients.
RESULTS: All the 8 patients were males with a mean age of 43 years. Of them, 6 had fever. Laboratory test showed a normal count of WBC and positive HBsAg. AFP was normal in 2 patients and 123 g/L in 6 patients. All the patients had a Child-Pugh A of liver function, 7 had no liver cirrhosis. The diameter of primary sarcomatoid hepatic carcinoma ranged 5 -10 cm. Huge cystic-solid lesions with irregular septa were found in 2 patients, multiple nodulated soft tissue shadows in 4 patients, and inhomogeneous low-density lesion with unconspicuous enhancement in the other 2 patients. Cancer embolus in the portal vein was displayed in 3 out of the 8 patients.
CONCLUSION: Primary sarcomatoid hepatic carcinoma is characterized by hepatic sarcoma and carcinoma. Its diagnosis depends largely on pathology and immunohistochemistry.
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Abstract
MicroRNA is a kind of endogenous non-coding small RNA, is universally present in animals, plants and viruses and plays an important role in the development, proliferation, differentiation and apoptosis of organisms through complementary pairing with target mRNA, which can regulate its expression or translation. Recent studies indicate that miRNA is closely associated with tumors. Study on tumor-associated miRNA using techniques of experimental biology and bioinformatics is currently a hot subject of research. Recent studies on hepatocellular carcinoma(HCC) have shown that HCC is correlated with abnormal expression of several miRNAs, such as miRNA-122, -21, -195, -18, -199a. However, few studies on miRNA expression in HBV-infected diseases are available. This paper reviews researches on the association of microRNA with the development of liver cancer.
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Chen LB, Xu JY, Yang Z, Wang GB. Silencing SMYD3 in hepatoma demethylates RIZI promoter induces apoptosis and inhibits cell proliferation and migration. World J Gastroenterol 2007; 13:5718-24. [PMID: 17963297 PMCID: PMC4171257 DOI: 10.3748/wjg.v13.i43.5718] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the role of SMYD3 in hepatocellular carcinoma (HCC) development and progression and to verify whether its regulation activity was through RIZ1 inactivation.
METHODS: Expression of SMYD3 in HCC cell lines and tissues were measured; silencing of SMYD3 by RNA interference (RNAi) was effectuated, hepatoma cell proliferation, migration and apoptosis were tested, with RIZ1 CpG promoter methylation, and corresponding mRNA expression were investigated.
RESULTS: SMYD3 over-expression in HCC was associated with RIZ1 hypermethylation and mRNA down-expression. Suppression of SMYD3 expression de-methylated RIZ1 CpG promoter (P < 0.01) and increased RIZ1 mRNA expression (P < 0.01). Consequently, SMYD3 down-expression with RIZ1 de-methylation strongly inhibited hepatoma cell growth (MTT inhibitory rates: Pgenesil-1-s1 60.95% ± 7.97%, Pgenesil-1-s2 72.14% ± 9.68% vs Pgenesil-1-hk 6.89% ± 4.12%, P < 0.01) and migration (Pgenesil-1-s1 4.24% ± 1.58%, Pgenesil-1-s1 4.87% ± 0.73% vs Pgenesil-1 19.03% ± 4.63%, Pgenesil-1-hk 19.95% ± 5.21%, P < 0.01) and induced apoptosis (FCM subG1 phase Pgenesil-1-s1 19.07% ± 1.78%, Pgenesil-1-s2 17.68% ± 2.36% vs Pgenesil-1 0.47% ± 0.12%, Pgenesil-1-hk 1.46% ± 0.28%, P < 0.01. TUNEL-positive cells: Pgenesil-1-s1 40.24% ± 5.18%, Pgenesil-1-s2 38.48% ± 4.65% vs Pgenesil-1 2.18% ± 1.34%, Pgenesil-1-hk 2.84% ± 1.22%, P < 0.01) in HepG2 cells.
CONCLUSION: These results demonstrate that SMYD3 plays a critical role in the carcinogenesis and progression of HCC. The proliferation, migration induction and apoptosis inhibition activities of SMYD3 may be mediated through RIZ1 CpG promoter hypermethylation.
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Chen LB, Wang GB. Adolescent hepatectomy: an analysis of 23 cases. Shijie Huaren Xiaohua Zazhi 2007; 15:2852-2855. [DOI: 10.11569/wcjd.v15.i26.2852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To analyze the parameters related to adolescent hepatectomy.
METHODS: Twenty-three adolescent hepatectomies performed in the Union Hospital Hepatobiliary Surgery Center were analyzed.
RESULTS: Among the 23 adolescent hepatectomies, 6 were for hepatocellular carcinoma, 7 for hepatoblastoma, 3 for lymphoma, 2 for sarcoma, 3 for cavernous hemangioma, and 2 for focal nodular hyperplasia. Five received right-half hepatectomy, 6 left-half hepatectomy, 1 right trisegemetectomy, 2 left-half and caudate hepatectomy, 1 isolated caudatectomy, and 10 segementectomy. The mean postoperative hospital stay was 8.3 ± 2.4 d, and 21 patients recovered to a preoperative liver function level at 7 d after operation. There was no liver failure or perioperative mortality.
CONCLUSION: Adolescent liver disease patients with diverse etiology, good liver compensation, can accept radical hepatectomy with rare postoperative complications, and recover quickly.
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Curry DN, Krivacic RT, Hsieh HB, Ladanyi A, Bergsrud DE, Ho MY, Chen LB, Kuhn P, Bruce RH. High-speed detection of occult tumor cells in peripheral blood. Conf Proc IEEE Eng Med Biol Soc 2007; 2004:1267-70. [PMID: 17271920 DOI: 10.1109/iembs.2004.1403401] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Although detection of tumor cells in peripheral blood using imitiunocytochemistry and optical scanning is a promising method for screening and monitoring cancer, it poses a major technical challenge due to the extremely low tumor cell concentration in blood. The preferred detection method - digital microscopy - is far too slow for analysis of the large numbers of cells required for statistical validity. We describe here a novel prescan instrument that rapidly identifies a small number of candidates for subsequent examination by digital microscopy to determine if they are genuine tumor cells. The prescan is 500 times faster than digital microscopy and yet has a similar sensitivity. The high prescan speed is accomplished by trading resolution for field of view. The resolution of the prescan is determined by the laser spot size of about 10 microns. While this resolution is much coarser than the submicron resolution of microscopes, it is still sufficient for detecting fluorescent cells because it matches the size of a typical cell. The wide field of view and high scan rate are enabled by a novel application of fiber optics.
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Fang LG, Chen LB, Li F, Zhu WL, Fang Q. [Comparison of low-dose dobutamine echocardiography and dual-isotope emission simultaneous myocardial perfusion acquisition for myocardial viability assessment]. Zhonghua Xin Xue Guan Bing Za Zhi 2007; 35:325-8. [PMID: 17711657] [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] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
OBJECTIVE To compare the value of low-dose dobutamine echocardiography (LDDE) and dual-isotope emission simultaneous myocardial perfusion acquisition (technetium-99-m-tetrofosmin/fluorine 18-fluorodeoxy-glucose) single-photon emission computed tomography (DISA-SPECT) for myocardial viability assessment in patients with acute myocardial infarction (MI). METHODS LDDE and DISA-SPECT were performed in 44 patients within 5-10 days after onset of first acute MI and percutaneous coronary intervention was made thereafter. A 16-segment semi-quantitative scoring model was adopted for both techniques. Wall motion improvement at follow-up (3 months after acute MI) compared with baseline before dobutamine infusion derived from two dimensional images was used as golden criteria for myocardial viability. RESULTS The sensitivity, specificity, diagnostic accuracy, positive and predictive values for identification of viable myocardium were 77%, 82%, 79%, 82% and 77%, respectively by LDDE and 85%, 62%, 74%, 71% and 79%, respectively by DISA. No difference was found between LDDE and DISA for identifying viable myocardium in hypokinetic segments (74.1% vs. 77.6%, P > 0.05) but less viable myocardium was detected by LDDE than DISA in akinetic segments (29% vs. 53%, P < 0.01). CONCLUSIONS Sensitivity was higher while specificity was lower on detecting viable myocardium by DISA compared to LDDE. Combined use of the two techniques could improve viable myocardium detection in patients with acute MI.
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Affiliation(s)
- Li-Gang Fang
- Department of Cardiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China.
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Wang YN, Jin ZY, Zhang ZH, Kong LY, Chen LB, Zhou L, Sun HY, Zhang H, Miao Q. Assessment of myocardial viability with contrast-enhanced magnetic resonance imaging and comparison with single-photon emission computed tomography. Chin Med Sci J 2006; 21:239-44. [PMID: 17249199] [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] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
OBJECTIVE To compare contrast-enhanced magnetic resonance imaging (ceMRI) with nuclear metabolic imaging for the assessment of myocardial viability in patients with chronic ischemic heart disease. METHODS Twenty patients with suspected chronic ischemic heart disease underwent ceMRI and technetium-99m sestamibi single-photon emission computed tomography (SPECT). Patients with positive SPECT results also underwent 18F-fluorodeoxyglucose (FDG) SPECT. In a 17-segment model, the segmental extent of hyperenhancement (SEH) by ceMRI was compared with segmental FDG and sestamibi uptake by SPECT. Correlation between the extent of hyperenhancement by ceMRI and left ventricular function was analyzed. RESULTS Seven patients got negative results both in ceMRI and technetium-99m sestamibi SPECT. The rest 13 patients with positive results then underwent 18F-FDG SPECT. In 221 segments of 13 patients, SEH was (2.1 +/- 8.2)%, (25.0 +/- 13.7)%, and (57.7 +/- 23.6)% in segments with normal metabolism/perfusion, metabolism/perfusion mismatch, and matched defects, respectively, and there were significant differences between either two of them (all P < 0.05). By receiver operating characteristic curve analysis, the area under the curve was 0.95 for the differentiation between viable and non-viable segments. At the cutoff value of 34%, SEH optimally differentiated viable from non-viable segments defined by SPECT. Using this threshold, the sensitivity and specificity of ceMRI to detect non-viable myocardium as defined by SPECT were 92% and 93%, respectively. Hyperenhancement size by ceMRI was correlated negatively with the left ventricular ejection fraction (r = - 0.90, P < 0.01) and positively with left ventricular volumes (r = 0.62 for end-diastolic volume, r = 0.75 for end-systolic volume, both P < 0.05). CONCLUSION CeMRI allows assessment of myocardial viability with a high accuracy in patients with chronic ischemic heart disease.
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Affiliation(s)
- Yi-Ning Wang
- Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730
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Zhang ZH, Miao Q, Lin SB, Zhang SY, Li DJ, Chen LB, Zhang H, Wang YN, Zhou L, Kong LY, Feng F, You H, Sun HY, Zhao WM, Zhang LR, Jin ZY. Retrospective analysis of magnetic resonance myocardial delayed enhancement. Chin Med Sci J 2006; 21:245-51. [PMID: 17249200] [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] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
OBJECTIVE To explore the imaging and related clinical characteristics of magnetic resonance (MR) delayed enhancement in patients with ischemic or nonischemic heart disease. METHODS Thirty-two cases who underwent MR myocardial cine and delayed enhancement imaging from January 2004 to October 2006 were retrospectively analyzed. The cine sequence imaging included the four-chamber view and the left ventricular short axis view. The delayed enhancement imaging was taken 10 minutes after the infusion of gadolinium from the antecubital vein with a segmented inversion-recovery-prepared T1-weighted fast gradient echo sequence. Patients underwent coronary computed tomography angiography (CTA) two weeks before or after the MR imaging examination. Combined with clinical history, the clinical and MR imaging characteristics of the patients who had delayed enhancement were analyzed. RESULTS MR delayed enhancement could be found in 16 cases. Among them, 12 cases had ischemic heart disease. Their coronary CTA showed one to three vessel diseases. The delayed enhancement was transmural or subendocardium, and the area of delayed enhancement corresponded well with one or more coronary arteries which had severe stenosis or occlusion. Four cases had nonischemic heart diseases. One case was dilated cardiomyopathy, with diffuse small midwall spots in delayed enhancemen and only 30% stenosis of the anterior descending coronary artery in coronary CTA. One case was hypertrophic cardiomyopathy, with delayed enhancement of strip- and patch-shaped at midwall of the hypertrophic myocardium. One case was restrictive cardiomyopathy, and the delayed enhancement was located in the area of subendocardium of both the right and left ventricles. Coronary CTA of these two cases were normal. The other case was a mass of the lateral wall of the left ventricle, and the delayed enhancement with a clumpy shape was located in the lateral wall of the left ventricle. CONCLUSIONS MR myocardial delayed enhancement is not a specific sign of myocardial infarction of ischemic heart disease. Nonischemic heart diseases including all kinds of primary cardiomyopathy and some other diseases affecting myocardium can also cause delayed enhancement, but their characteristics are different. The differentiation of the etiology of the nonischemic heart disease with delayed enhancement relies upon the intimate connection with clinical history and the cine sequence MR images.
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Affiliation(s)
- Zhu-Hua Zhang
- Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730
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