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Zhao CX, Zhong FY, Dong JX, Ge H, Bu J. [Application of machine learning in risk assessment for acute coronary syndrome]. Zhonghua Xin Xue Guan Bing Za Zhi 2024; 52:311-315. [PMID: 38514336 DOI: 10.3760/cma.j.cn112148-20231024-00375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/23/2024]
Affiliation(s)
- C X Zhao
- Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - F Y Zhong
- Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - J X Dong
- Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - H Ge
- Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - J Bu
- Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
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Liu M, Yu X, Bu J, Xiao Q, Ma S, Chen N, Qu C. Comparative analyses of salivary exosomal miRNAs for patients with or without lung cancer. Front Genet 2023; 14:1249678. [PMID: 38028609 PMCID: PMC10657645 DOI: 10.3389/fgene.2023.1249678] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 10/16/2023] [Indexed: 12/01/2023] Open
Abstract
Introduction: Lung cancer is the most frequent cause of cancer-related deaths worldwide. Exosomes are involved in different types of cancer, including lung cancer. Methods: We collected saliva from patients with (LC) or without (NC) lung cancer and successfully isolated salivary exosomes by ultracentrifugation. MiRNA sequencing was implemented for the exosome samples from NC and LC groups, dgeR was used to determine differentially expressed miRNAs (DE miRNAs), and quantitative real-time polymerase chain reaction (qPCR) was used to verify three differentially expressed microRNAs (miRNAs). Results: A total of 372 miRNAs were identified based on the sequencing results. Subsequently, 15 DE miRNAs were identified in LC vs. NC, including eight upregulated miRNAs and seven downregulated miRNAs. Some DE miRNAs were validated via qPCR. A total of 488 putative target genes of the upregulated DE miRNAs were found, and the functional analyses indicated that numerous target genes were enriched in the pathways associated with cancer. Discussion: This suggests that miRNAs of salivary exosomes might have the potential to be used as biomarkers for prediction and diagnosis of lung cancer.
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Affiliation(s)
| | | | | | | | | | | | - Changfa Qu
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China
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Fu B, Zhou F, Zhang J, Kong X, Ni B, Bu J, Xu S, He C. Sevoflurane attenuates proliferative and migratory activity of lung cancer cells via mediating the microRNA-100-3p/sterol O-Acyltransferase 1 axis. CHINESE J PHYSIOL 2023; 66:456-465. [PMID: 38149558 DOI: 10.4103/cjop.cjop-d-22-00124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2023] Open
Abstract
Recently, evidence has shown that microRNA-100-3p (miR-100-3p) has been revealed as a tumor suppressor in diverse human diseases, while its capability in lung cancer warrants further validation. In this work, we aimed to discuss the impact of sevoflurane on biological functions of lung cancer cells by modulating the miR-100-3p/sterol O-acyltransferase 1 (SOAT1) axis. Lung cancer cell lines (A549 and H460) were treated with various concentrations of sevoflurane. Cell viability, proliferation, migration, and invasion were evaluated using MTT, colony formation, wound healing, and transwell assays. Moreover, miR-100-3p and SOAT1 expressions were evaluated by reverse transcription-quantitative polymerase chain reaction in lung cancer cells. The target interaction between miR-100-3p and SOAT1 was predicted by bioinformatics analysis and verified by the dual-luciferase reporter gene assay. The findings of our work demonstrated that sevoflurane impeded the abilities on viability, proliferation, migration, and invasion of A549 and H460 cells. The expression of miR-100-3p was reduced, and SOAT1 expression was elevated in lung cancer cells. miR-100-3p targeted SOAT1. Besides, sevoflurane could lead to expressed improvement of miR-100-3p or limitation of SOAT1. Downregulation of miR-100-3p or upregulation of SOAT1 restored the suppression of sevoflurane on abilities of viability, proliferation, migration, and invasion in A549 and H460 cells. In the rescue experiment, downregulation of SOAT1 reversed the impacts of downregulation of miR-100-3p on sevoflurane on lung cancer cells. Collectively, our study provides evidence that sevoflurane restrained the proliferation and invasion in lung cancer cells by modulating the miR-100-3p/SOAT1 axis. This article provides a new idea for further study of the pathogenesis of lung cancer.
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Affiliation(s)
- Bicheng Fu
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China
| | - Fucheng Zhou
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China
| | - Jian Zhang
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China
| | - Xianglong Kong
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China
| | - Boxiong Ni
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China
| | - Jianlong Bu
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China
| | - Shidong Xu
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China
| | - Changjun He
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China
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Hall J, Sud S, Casey D, Poellmann M, Bu J, Wang A, Hong S, Shen C. Prospective Characterization of Circulating Tumor Cell Kinetics in Patients with Locoregional Head and Neck Cancer Receiving Definitive Therapy. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.1318] [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: 11/16/2022]
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Ning J, Wang F, Bu J, Zhu K, Liu W. Down-regulated m6A reader FTO destabilizes PHF1 that triggers enhanced stemness capacity and tumor progression in lung adenocarcinoma. Cell Death Dis 2022; 8:354. [PMID: 35945194 PMCID: PMC9363432 DOI: 10.1038/s41420-022-01125-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 07/07/2022] [Accepted: 07/08/2022] [Indexed: 11/28/2022]
Abstract
Aberrant epigenetic drivers or suppressors contribute to LUAD progression and drug resistance, including KRAS, PTEN, Keap1. Human Plant Homeodomain (PHD) finger protein 1 (PHF1) coordinates with H3K36me3 to increase nucleosomal DNA accessibility. Previous studies revealed that PHF1 is markedly upregulated in various tumors and enhances cell proliferation, migration and tumorigenesis. However, its roles in LUAD are still unknown. We aimed to depict the biological roles of PHF1 and identify useful targets for clinical treatment of LUAD. Based on the bioinformatic analysis, we found that PHF1 was down-regulated in LUAD samples and low PHF1 expressions correlated with unfavorable clinical characteristics. Patients with low PHF1 had poorer survival outcomes relative to those with high PHF1. Targeting PHF1 potentiated cell growth, migration and in vivo proliferation. Mechanistically, FTO mediated the stabilization of PHF1 mRNA by demethylating m6A, which particularly prevented YTHDF2 from degrading PHF1 transcripts. Of note, FTO also expressed lowly in LUAD that predicts poor prognosis of patients. FTO inhibition promoted LUAD progression, and PHF1 overexpression could reverse the effect. Lastly, down-regulated FTO/PHF1 axis could mainly elevate FOXM1 expression to potentiate the self-renewal capacity. Targeting FOXM1 was effective to suppress PHF1low/− LUAD growth. Collectively, our findings revealed that FTO positively regulates PHF1 expression and determined the tumor-suppressive role of FTO/PHF1 axis, thereby highlighting insights into its epigenetic remodeling mechanisms in LUAD progression and treatment.
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Affiliation(s)
- Jinfeng Ning
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, No. 150, Haping Road, Harbin, 150081, Heilongjiang, China
| | - Fengjiao Wang
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, No. 150, Haping Road, Harbin, 150081, Heilongjiang, China
| | - Jianlong Bu
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, No. 150, Haping Road, Harbin, 150081, Heilongjiang, China
| | - Kaibin Zhu
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, No. 150, Haping Road, Harbin, 150081, Heilongjiang, China
| | - Wei Liu
- The forth department of medical oncology, Harbin Medical University Cancer Hospital, No. 150, Haping Road, Harbin, 150081, Heilongjiang, China.
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Xu K, Cui Y, Yu Y, Wei H, Wang H, Wei Y, Chen Y, Lv D, Yu Y, Bu J. Preparation of Magnesium Aluminate Spinel Nanofibers with High Temperature Resistance by Electrospinning Process Based on Non-Hydrolytic Sol-Gel Method. Russ J Phys Chem B 2022. [DOI: 10.1134/s1990793122040054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Kong X, Bu J, Chen J, Ni B, Fu B, Zhou F, Pang S, Zhang J, Xu S, He C. PIGF and Flt-1 on the surface of macrophages induces the production of TGF-β1 by polarized tumor-associated macrophages to promote lung cancer angiogenesis. Eur J Pharmacol 2021; 912:174550. [PMID: 34610279 DOI: 10.1016/j.ejphar.2021.174550] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 09/30/2021] [Accepted: 09/30/2021] [Indexed: 01/17/2023]
Abstract
BACKGROUND The interaction between tumor cells and tumor microenvironment is a necessary condition for promoting the metastasis of malignant tumors. METHODS Two different transwell culture systems were interfered with by recombinant factor placental growth factor (re-PIGF) and the re-PIGF + transforming growth factor-β1 (TGF-β1)-neutralizing antibody (anti-TGF-β1). We performed immunofluorescence, flow cytometry and enzyme linked immunosorbent assay (ELISA) to analyze the expression of PIGF, fms-like tyrosine kinase-1 (Flt-1), macrophage marker F4/80 +, macrophage M2 marker CD163+ and TGF-β1 in vitro. Meanwhile, cell viability assay and optical microscope assay were conducted to explore the cell viability and vascularization ability of human umbilical vein endothelial cells (HUVECs). RESULTS Re-PIGF increased the expression of PIGF in A549 cells and the expression of Flt-1 in BM-Mac cells, and significantly enhanced the ability of bone marrow-derived macrophages (BM-Mac) to transform into macrophages. At the same time, re-PIGF increased the expression of cytokine TGF-β1 in A549 cells/BM-Mac transwell culture system. On the contrary, re-PIGF + anti-TGF-β1 inhibited the expression of Flt-1 in BM-Mac cells and inhibited the ability of BM-Mac cells to transform into macrophages. Finally, re-PIGF + anti-TGF-β1 reduced the cell viability and angiogenesis of HUVECs. CONCLUSION The surface molecule PIGF of lung cancer cells could bind to the receptor Flt-1 on the surface of macrophages, thereby increasing the production of TGF-β1, and ultimately promoting the formation of angiogenesis in lung cancer.
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Affiliation(s)
- Xianglong Kong
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, 150086, Heilongjiang, China
| | - Jianlong Bu
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, 150086, Heilongjiang, China
| | - Junhui Chen
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, 150086, Heilongjiang, China
| | - Boxiong Ni
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, 150086, Heilongjiang, China
| | - Bicheng Fu
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, 150086, Heilongjiang, China
| | - Fucheng Zhou
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, 150086, Heilongjiang, China
| | - Sainan Pang
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, 150086, Heilongjiang, China
| | - Jian Zhang
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, 150086, Heilongjiang, China
| | - Shidong Xu
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, 150086, Heilongjiang, China
| | - Changjun He
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, 150086, Heilongjiang, China.
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Sud S, Hall J, Tan X, Roberts O, Green R, Park S, Poellmann M, Bu J, Hong S, Wang A, Casey D. Prospective Characterization of Circulating Tumor Cell Kinetics in Patients With Oligometastatic Disease Receiving Definitive Radiation Therapy. Int J Radiat Oncol Biol Phys 2021. [DOI: 10.1016/j.ijrobp.2021.07.150] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Zhao S, Zheng X, Zhu X, Ning J, Zhu K, Yan Y, Zhang J, Bu J, Liu M, Xu S. Surgical Trauma-induced CCL2 Upregulation Mediates Lung Cancer Progression by Promoting Treg Recruitment in Mice and Patients. Cancer Invest 2021; 40:91-102. [PMID: 34515610 DOI: 10.1080/07357907.2021.1977314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Surgical removal of the tumor is currently the first-line treatment for lung cancer, but the procedure may accelerate cancer progression through immunosuppression. However, whether CCL2 (C-C motif chemokine ligand 2) enhances cancer progression by affecting regulatory T cells (Tregs) remains unknown. We found that the volume and weight of tumors were larger in the surgical trauma group than in the control group. CCL2 expression and Treg abundance were increased in tumor tissues after surgical trauma, and CCL2 expression was positively associated with Treg abundance. These results demonstrated that surgical trauma contributes to lung cancer progression by increasing CCL2 expression, thus promoting Treg recruitment.
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Affiliation(s)
- Su Zhao
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, Nangang District, China
| | - Xiaoyu Zheng
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, Nangang District, China
| | - Xidong Zhu
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, Nangang District, China
| | - Jinfeng Ning
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, Nangang District, China
| | - Kaibin Zhu
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, Nangang District, China
| | - Yubo Yan
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, Nangang District, China
| | - Jian Zhang
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, Nangang District, China
| | - Jianlong Bu
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, Nangang District, China
| | - Mengfeng Liu
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, Nangang District, China
| | - Shidong Xu
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, Nangang District, China
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Yan Y, Jin X, Sun H, Pang S, Kong X, Bu J, Xu S. MiR-139-5p Targetedly Regulates YAF2 and Mediates the AKT/P38 MAPK Signaling Pathway to Alleviate the Metastasis of Non-Small Cell Lung Cancer Cells and Their Resistance Against Cisplatin. Cancer Manag Res 2021; 13:3639-3650. [PMID: 33981163 PMCID: PMC8109024 DOI: 10.2147/cmar.s254671] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 03/20/2020] [Accepted: 07/03/2020] [Indexed: 12/16/2022] Open
Abstract
Objective To explore relevant mechanisms of miR-139-5p in alleviating the metastasis of non-small cell lung cancer cells (NSCLC) and their resistance against cisplatin. Methods Quantitative real-time polymerase chain reaction (qRT-PCR) and Western blot (WB) assays were carried out to determine the protein levels of miR-139-5p and YAF2, and cisplatin (DDP)-resistant NSCLC cell strains were established. Subsequently, an MTT assay was employed to evaluate the viability of the cell strains, a Transwell assay to evaluate cell invasion activity, and flow cytometry to analyze cell apoptosis rate. Finally, a Western blot assay was carried out to determine the protein levels of P-PI3K and p-p38. Results NSCLC tissues showed lower miR-139-5p expression and higher YAF2 expression than paracancerous tissues and human normal lung epithelial cells, and miR-139-5p was related to the prognosis of NSCLC patients. Overexpression of miR-139-5p or knock-down of YAF2 inhibited the proliferation and invasion of NSCLC cells and induced their apoptosis. Additionally, the dual-luciferase reporter assay verified a targeting relationship between miR-139-5p and YAF2. Overexpression of miR-139-5p and knockdown of YAF2 reversed the resistance of A549/DDP cells against DDP, inactivated p38 and Akt proteins, and inhibited the AKT/p38 MAPK signaling pathway. Furthermore, inhibiting the AKT/p38 MAPK signaling pathway with MK2206 resisted the effects of knock-down of miR-139-5p on DDP resistance in NSCLC cells. Conclusion MiR-139-5p targetedly regulates YAF2 and mediates the AKT/p38 MAPK signaling pathway to alleviate the metastasis of NSCLC cells and their resistance against cisplatin, which may be a novel target for improving the therapeutic effect on NSCLC.
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Affiliation(s)
- Yubo Yan
- Department of Thoracic Surgery, Harbin Medical University Tumer Hospital, Harbin, Heilongjiang Province, 150000, People's Republic of China
| | - Xiangyuan Jin
- Department of Thoracic Surgery, Harbin Medical University Tumer Hospital, Harbin, Heilongjiang Province, 150000, People's Republic of China
| | - HaoBo Sun
- Department of Thoracic Surgery, Harbin Medical University Tumer Hospital, Harbin, Heilongjiang Province, 150000, People's Republic of China
| | - Sainan Pang
- Department of Thoracic Surgery, Harbin Medical University Tumer Hospital, Harbin, Heilongjiang Province, 150000, People's Republic of China
| | - Xianglong Kong
- Department of Thoracic Surgery, Harbin Medical University Tumer Hospital, Harbin, Heilongjiang Province, 150000, People's Republic of China
| | - Jianlong Bu
- Department of Thoracic Surgery, Harbin Medical University Tumer Hospital, Harbin, Heilongjiang Province, 150000, People's Republic of China
| | - Shidong Xu
- Department of Thoracic Surgery, Harbin Medical University Tumer Hospital, Harbin, Heilongjiang Province, 150000, People's Republic of China
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Bai P, Bu J, Li R, Sun P, Sun H, Sun JH. [Operative efficacy of 13 malignant uterine tumors after Cf-252 intracavitary irradiation]. Zhonghua Zhong Liu Za Zhi 2021; 42:882-884. [PMID: 33113632 DOI: 10.3760/cma.j.cn112152-20190903-00570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the surgical therapeutic efficacy of uterine tumors patients underwent Cf-252 neutron intra-cavity and external radiotherapy, and evaluate the application value of Cf-252 neutron radiotherapy. Methods: Thirteen cases of uterine tumor with local suspicious lesions or poor prognostic factors after CF-252 neutron intracavity and external radiotherapy were treated with surgery. Among them, 12 cases underwent extrafascial hysterectomy, 1 case underwent extensive hysterectomy and lymphadenectomy. The postoperative pathology and follow-up results were used to evaluate the efficacy. Results: Nine cases showed severe response to radiotherapy in postoperative cervical pathological tissues without residual tumor, and survived for more than 3-14 years, the median survival time was 8 years. All of 4 cases with residual tumor died within 1 year. Delayed healing of vaginal wounds occurred in 3 of the 12 cases. Conclusions: Cf-252 is a good brachytherapy source. The cervical tissue shows severe response to radiotherapy and prolonged healing time of vaginal wound is observed in some cases after CF-252 radiotherapy. To those uterine tumor patients with local suspicious lesions or poor prognostic factors after CF-252 neutron intracavity and external radiotherapy, extrafascial hysterectomy is a safe and feasible treatment method.
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Affiliation(s)
- P Bai
- Department of Gynecology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - J Bu
- Department of Radiotherapy, The Third Medical Center of Chinese PLA General Hospital, Beijing 100039, China
| | - R Li
- Department of Radiotherapy, The Third Medical Center of Chinese PLA General Hospital, Beijing 100039, China
| | - P Sun
- Department of Gynecology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - H Sun
- Department of Gynecology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - J H Sun
- Department of Gynecology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
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Wu X, Gao Y, Bu J, Deng L, Zhang P, Chi M, Jiang L, Shi X, Ning S, Wang G. Identification of Potential Long Non-coding RNA Expression Quantitative Trait Methylations in Lung Adenocarcinoma and Lung Squamous Carcinoma. Front Genet 2020; 11:602035. [PMID: 33362860 PMCID: PMC7756030 DOI: 10.3389/fgene.2020.602035] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 09/02/2020] [Accepted: 11/16/2020] [Indexed: 12/16/2022] Open
Abstract
There are associations between DNA methylation and the expression of long non-coding RNA (lncRNA), also known as lncRNA expression quantitative trait methylations (lnc-eQTMs). Lnc-eQTMs may induce a wide range of carcinogenesis pathways. However, lnc-eQTMs have not been globally identified and studied, and their roles in lung adenocarcinoma (LUAD) and lung squamous carcinoma (LUSC) are largely unknown. In the present study, we identified some differential methylation sites located in genes of long intergenic non-coding RNAs (lincRNAs) and other types of lncRNAs in LUAD and LUSC. An integrated pipeline was established to construct two global cancer-specific regulatory networks of lnc-eQTMs in LUAD and LUSC. The associations between eQTMs showed common and specific features between LUAD and LUSC. Some lnc-eQTMs were also related with survival in LUAD- and LUSC-specific regulatory networks. Lnc-eQTMs were associated with cancer-related functions, such as lung epithelium development and vasculogenesis by functional analysis. Drug repurposing analysis revealed that these lnc-eQTMs may mediate the effects of some anesthesia-related drugs in LUAD and LUSC. In summary, the present study elucidates the roles of lnc-eQTMs in LUAD and LUSC, which could improve our understanding of lung cancer pathogenesis and facilitate treatment.
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Affiliation(s)
- Xiaohong Wu
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Yue Gao
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Jianlong Bu
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, China
| | - Lin Deng
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Pinyi Zhang
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Meng Chi
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Lihua Jiang
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Xiaoding Shi
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Shangwei Ning
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Guonian Wang
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, China
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Bai X, He C, Fu B, Kong X, Bu J, Zhu K, Zheng W, Zhou F, Ni B. microRNA-877 contributes to decreased non-small cell lung cancer cell growth via the PI3K/AKT pathway by targeting tartrate resistant acid phosphatase 5 activity. Cell Cycle 2020; 19:3260-3276. [PMID: 33222607 DOI: 10.1080/15384101.2020.1839697] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Non-small cell lung cancer (NSCLC) is a leading cause of cancer death in both men and women. microRNAs (miRs) can exert important functions in cancer development. However, the role of miR-877 in NSCLC as it relates to tartrate resistant acid phosphatase 5 (ACP5) is unknown. For this study, the gain-and-loss-of-function experiments were performed to explore the effects of miR-877 and ACP5 on NSCLC. miR-877 expression in LC and paracancerous tissues, lung epithelial cell line and NSCLC cell lines was detected, and the association between miR-877 expression and clinical features of LC patients was analyzed. The levels of ACP5, epithelial-mesenchymal transition (EMT) markers and apoptosis-related proteins were measured. In vivo experiments were conducted for further validation. Consequently, we found that miR-877 expression was lowered in LC tissues and cell lines, and correlated with clinical stage, differentiation, lymph node metastasis and prognosis of NSCLC patients. Additionally, miR-877 was determined to inhibit ACP5 activity, and miR-877 downregulated the PI3K/AKT pathway by silencing ACP5. Furthermore, overexpression of miR-877 inhibited the viability, migration, invasion and EMT of NSCLC cells, but promoted cell apoptosis. In conclusion, miR-877 overexpression inhibited malignant biological behaviors of NSCLC cells by downregulating ACP5 and inactivating the PI3K/AKT pathway.
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Zhang P, Bu J, Wu X, Deng L, Chi M, Ma C, Shi X, Wang G. Upregulation of μ-Opioid Receptor in the Rat Spinal Cord Contributes to the α2-Adrenoceptor Agonist Dexmedetomidine-Induced Attenuation of Chronic Morphine Tolerance in Cancer Pain. J Pain Res 2020; 13:2617-2627. [PMID: 33116804 PMCID: PMC7573317 DOI: 10.2147/jpr.s274225] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 09/04/2020] [Indexed: 11/23/2022] Open
Abstract
Background Sustained morphine treatment for cancer pain has been limited due to analgesic tolerance. Opioid receptor internalization and desensitization mediated by downregulation of mu-opioid receptor (MOR) expression have been confirmed as one of the mechanisms of chronic morphine tolerance. In addition to the opiate system, the α2-adrenergic system is involved in the development of morphine tolerance. Several studies reported that co-administration of α2-adrenoceptor agonist dexmedetomidine inhibits morphine tolerance in normal or neuropathic pain animals. However, the effect of dexmedetomidine on morphine tolerance has not been studied in cancer pain. Therefore, we investigated the effect of intrathecal injection of dexmedetomidine on the development of morphine tolerance in cancer pain and on the expression of MOR in the spinal cord of morphine-tolerant cancer pain rats. Methods The model was established using a rat’s right hind paw injection of Walker 256 cancer cells. Subcutaneous morphine (10mg/kg) was administrated twice daily for 7 days; meanwhile, the rats received intrathecal α2-adrenoceptor agonist dexmedetomidine (10μ/kg) or antagonist MK-467 (0.25mg/kg) in test groups. Rats receiving drug vehicle served as the control group. Antinociception was detected by von Frey filaments and hot-plate tests. The expression of MOR in the spinal cord was examined through real-time reverse transcription polymerase chain reaction and Western blotting. The data were analyzed via analysis of variance followed by Student t-test with Bonferroni correction. Results Seven-day chronic morphine administration elicited notable analgesic tolerance in the rats with cancer pain. Co-administration of α2-adrenoceptor agonist dexmedetomidine enhanced morphine analgesia and attenuated morphine tolerance, which could be blocked by α2-adrenoceptor antagonist MK-467. Furthermore, pre-treatment of dexmedetomidine significantly upregulated MOR protein expression without a notable change in MOR mRNA expression in the spinal cord. Conclusion Our findings suggest that intrathecal injection of dexmedetomidine enhanced morphine analgesia and attenuated morphine tolerance in cancer pain, potentially by upregulating MOR expression in the spinal cord. The α2-adrenoceptor agonist may provide a more versatile analgesia option for morphine treatment for cancer pain.
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Affiliation(s)
- Pinyi Zhang
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, People's Republic of China
| | - Jianlong Bu
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, People's Republic of China
| | - Xiaohong Wu
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, People's Republic of China
| | - Lin Deng
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, People's Republic of China
| | - Meng Chi
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, People's Republic of China
| | - Chao Ma
- Department of Anesthesiology, The Fourth Hospital of Harbin Medical University, Harbin, People's Republic of China
| | - Xiaoding Shi
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin, People's Republic of China
| | - Guonian Wang
- Department of Anesthesiology, The Fourth Hospital of Harbin Medical University, Harbin, People's Republic of China
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Bu J, Zhang P, Zhu K, Yan Y, Shi B, Wang J, Xu S. Constructing a global transcriptional regulatory landscape for early non-small cell lung cancer to identify hub genes and key pathways. Aging (Albany NY) 2020; 12:17948-17957. [PMID: 32931455 PMCID: PMC7585098 DOI: 10.18632/aging.103475] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 02/11/2020] [Accepted: 05/27/2020] [Indexed: 01/24/2023]
Abstract
This study aimed to investigate the potential pathogenesis of early non-small cell lung cancer (NSCLC), including lung adenocarcinoma (LUAD) and lung squamous cell carcinoma (LUSC), by constructing a global transcriptional regulatory landscape to identify hub genes and key pathways. A total of 1,206 differentially expressed genes (DEGs) in early NSCLC were identified compared to normal lung tissue samples in GSE33532 and GSE29013. DEGs-related protein-protein interaction networks (PPIs) were constructed based on the STRING database and were then modularly analyzed using the ClusterOne tool. The enrichment analysis revealed that multiple modules were significantly involved in pathways such as the TNF signaling pathway, PPAR signaling pathway and PI3K/AKt signaling pathway. Ten genes were identified as hub genes in the PPIs and also found up-regulated at protein level. The prognostic value of the hub genes and the ten hub gene set variation score varied according to the different pathological types of NSCLC, which suggested the ten hub gene expression patterns can reflect the heterogeneity of two types of NSCLC. In conclusion, by carrying out a series of in-depth analyses, hub genes and key pathways associated with early NSCLC were identified by a global transcriptional regulatory landscape.
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Affiliation(s)
- Jianlong Bu
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin 150081, Heilongjiang Province, China
| | - Pinyi Zhang
- Department of Anesthesiology, Harbin Medical University Cancer Hospital, Harbin 150081, Heilongjiang Province, China
| | - Kaibin Zhu
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin 150081, Heilongjiang Province, China
| | - Yubo Yan
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin 150081, Heilongjiang Province, China
| | - Bowen Shi
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin 150081, Heilongjiang Province, China
| | - Junfeng Wang
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin 150081, Heilongjiang Province, China
| | - Shidong Xu
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin 150081, Heilongjiang Province, China
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Lindsay D, Moon D, Mahbooba Z, Park S, Poellmann M, Bu J, Hong S, Wang A. Nano-Based Quantification of Circulating Tumor Cells as a Biomarker of Disease Status in Oligometastatic Patients Following Metastases-Directed Radiation Therapy. Int J Radiat Oncol Biol Phys 2018. [DOI: 10.1016/j.ijrobp.2018.06.340] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Wang F, Li G, Ning J, Chen L, Xu H, Kong X, Bu J, Zhao W, Li Z, Wang X, Li X, Ma J. Alcohol accumulation promotes esophagitis via pyroptosis activation. Int J Biol Sci 2018; 14:1245-1255. [PMID: 30123073 PMCID: PMC6097477 DOI: 10.7150/ijbs.24347] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [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: 12/13/2017] [Accepted: 06/12/2018] [Indexed: 02/07/2023] Open
Abstract
Gastroesophageal reflux impairs the mucosal barrier in the distal esophagus, allowing chronic exposure of the squamous epithelium to multitudinous stimulations and inducing chronic inflammation. Esophagitis is a response to inflammation of the esophageal squamous mucosa. Our study clarified that alcohol accumulation could aggravate the progress of esophagitis by inducing pyroptosis; however, Ac-YVAD-CMK, an inhibitor of caspase-1, could effectively suppress the expression of IL-1β and IL-18 both in vivo and in vitro, reducing the inflammatory response, which is promised to be an agent to inhibit the progression of esophagitis. Additionally, caspase-1-derived pyroptosis is involved in esophageal cancer.
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Affiliation(s)
- Fengjiao Wang
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, 150001, China
| | - Gang Li
- Department of General Surgery, the Second Affiliated Hospital of Harbin Medical University, Harbin, 150000, China
| | - Jinfeng Ning
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, 150001, China
| | - Lantao Chen
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, 150001, China
| | - Hai Xu
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, 150001, China
| | - Xianglong Kong
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, 150001, China
| | - Jianlong Bu
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, 150001, China
| | - Weiwei Zhao
- Department of Epidemiology and Biostatistics, School of Public Health, Harbin Medical University, Harbin, 150086, China
| | - Zhengtian Li
- Department of General Surgery, the First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
| | - Xiuyun Wang
- Department of Abdominal Ultrasound, First Hospital of Harbin Medical University, Harbin, 150001, China
| | - Xiaoguang Li
- Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Jianqun Ma
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin, 150001, China
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Xu H, Wu X, Sun D, Li S, Zhang S, Teng M, Bu J, Zhang X, Meng B, Wang W, Tian G, Lin H, Yuan D, Lang J, Xu S. SEGF: A Novel Method for Gene Fusion Detection from Single-End Next-Generation Sequencing Data. Genes (Basel) 2018; 9:genes9070331. [PMID: 30004447 PMCID: PMC6070977 DOI: 10.3390/genes9070331] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 06/21/2018] [Accepted: 06/27/2018] [Indexed: 11/23/2022] Open
Abstract
With the development and application of next-generation sequencing (NGS) and target capture technology, the demand for an effective analysis method to accurately detect gene fusion from high-throughput data is growing. Hence, we developed a novel fusion gene analyzing method called single-end gene fusion (SEGF) by starting with single-end DNA-seq data. This approach takes raw sequencing data as input, and integrates the commonly used alignment approach basic local alignment search tool (BLAST) and short oligonucleotide analysis package (SOAP) with stringent passing filters to achieve successful fusion gene detection. To evaluate SEGF, we compared it with four other fusion gene discovery analysis methods by analyzing sequencing results of 23 standard DNA samples and DNA extracted from 286 lung cancer formalin fixed paraffin embedded (FFPE) samples. The results generated by SEGF indicated that it not only detected the fusion genes from standard samples and clinical samples, but also had the highest accuracy and sensitivity among the five compared methods. In addition, SEGF was capable of detecting complex gene fusion types from single-end NGS sequencing data compared with other methods. By using SEGF to acquire gene fusion information at DNA level, more useful information can be retrieved from the DNA panel or other DNA sequencing methods without generating RNA sequencing information to benefit clinical diagnosis or medication instruction. It was a timely and cost-effective measure with regard to research or diagnosis. Considering all the above, SEGF is a straightforward method without manipulating complicated arguments, providing a useful approach for the precise detection of gene fusion variation.
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Affiliation(s)
- Hai Xu
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin 150049, China.
| | - Xiaojin Wu
- Department of Radiation Oncology, The First People's Hospital of Xuzhou, Xuzhou 221002, China.
| | - Dawei Sun
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin 150049, China.
| | - Shijun Li
- Department of Pathology, Chifeng Municiple Hospital, Chifeng 024000, China.
| | - Siwen Zhang
- Geneis Beijing Co., Ltd., Beijing 100102, China.
| | - Miao Teng
- Geneis Beijing Co., Ltd., Beijing 100102, China.
| | - Jianlong Bu
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin 150049, China.
| | - Xizhe Zhang
- Department of Anesthesiology, Chifeng Municiple Hospital, Chifeng 024000, China.
| | - Bo Meng
- Geneis Beijing Co., Ltd., Beijing 100102, China.
| | - Weitao Wang
- Geneis Beijing Co., Ltd., Beijing 100102, China.
| | - Geng Tian
- Geneis Beijing Co., Ltd., Beijing 100102, China.
| | - Huixin Lin
- Geneis Beijing Co., Ltd., Beijing 100102, China.
| | - Dawei Yuan
- Geneis Beijing Co., Ltd., Beijing 100102, China.
| | - Jidong Lang
- Geneis Beijing Co., Ltd., Beijing 100102, China.
| | - Shidong Xu
- Department of Thoracic Surgery, Harbin Medical University Cancer Hospital, Harbin 150049, China.
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Xiang P, Bu J, Qiao Z, Zhuo XY, Wu HJ, Shen M. [Identification of Methamphetamine Abuse and Selegiline Use: Chiral Analysis of Methamphetamine and Amphetamine in Urine]. Fa Yi Xue Za Zhi 2017; 33:599-603. [PMID: 29441766 DOI: 10.3969/j.issn.1004-5619.2017.06.006] [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] [Received: 08/13/2017] [Indexed: 06/08/2023]
Abstract
OBJECTIVES To study the content variation of selegiline and its metabolites in urine, and based on actual cases, to explore the feasibility for the identification of methamphetamine abuse and selegiline use by chiral analysis. METHODS The urine samples were tested by chiral separation and LC-MS/MS method using CHIROBIOTIC™ V2 chiral liquid chromatography column. The chiral analysis of methamphetamine and amphetamine were performed on the urine samples from volunteers of selegiline use and drug addicts whom suspected taking selegiline. RESULTS After 5 mg oral administration, the positive test time of selegiline in urine was less than 7 h. The mass concentrations of R(-)-methamphetamine and R(-)-amphetamine in urine peaked at 7 h which were 0.86 μg/mL and 0.18 μg/mL and couldn't be detected after 80 h and 168 h, respectively. The sources of methamphetamine and amphetamine in the urine from the drug addicts whom suspected taking selegiline were analysed successfully by present method. CONCLUSIONS The chiral analysis of methamphetamine and amphetamine, and the determination of selegiline's metabolites can be used to distinguish methamphetamine abuse from selegiline use.
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Affiliation(s)
- P Xiang
- Shanghai Key Laboratory of Forensic Medicine, Shanghai Forensic Service Platform, Academy of Forensic Science, Shanghai 200063, China
| | - J Bu
- Shanghai Key Laboratory of Forensic Medicine, Shanghai Forensic Service Platform, Academy of Forensic Science, Shanghai 200063, China
| | - Z Qiao
- Shanghai Key Laboratory of Forensic Medicine, Shanghai Forensic Service Platform, Academy of Forensic Science, Shanghai 200063, China
| | - X Y Zhuo
- Shanghai Key Laboratory of Forensic Medicine, Shanghai Forensic Service Platform, Academy of Forensic Science, Shanghai 200063, China
| | - H J Wu
- Shanghai Key Laboratory of Forensic Medicine, Shanghai Forensic Service Platform, Academy of Forensic Science, Shanghai 200063, China
| | - M Shen
- Shanghai Key Laboratory of Forensic Medicine, Shanghai Forensic Service Platform, Academy of Forensic Science, Shanghai 200063, China
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Li D, He C, Wang J, Wang Y, Bu J, Kong X, Sun D. MicroRNA-138 Inhibits Cell Growth, Invasion, and EMT of Non-Small Cell Lung Cancer via SOX4/p53 Feedback Loop. Oncol Res 2017; 26:385-400. [PMID: 28653608 PMCID: PMC7844796 DOI: 10.3727/096504017x14973124850905] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [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: 12/11/2022] Open
Abstract
Many studies have shown that downregulation of miR-138 occurs in a variety of cancers including non-small cell lung cancer (NSCLC). However, the precise mechanisms of miR-138 in NSCLC have not been well clarified. In this study, we investigated the biological functions and molecular mechanisms of miR-138 in NSCLC cell lines, discussing whether it could turn out to be a therapeutic biomarker of NSCLC in the future. In our study, we found that miR-138 is downregulated in NSCLC tissues and cell lines. Moreover, the low level of miR-138 was associated with increased expression of SOX4 in NSCLC tissues and cell lines. Upregulation of miR-138 significantly inhibited proliferation of NSCLC cells. In addition, invasion and EMT of NSCLC cells were suppressed by overexpression of miR-138. However, downregulation of miR-138 promoted cell growth and metastasis of NSCLC cells. Bioinformatics analysis predicted that SOX4 was a potential target gene of miR-138. Next, luciferase reporter assay confirmed that miR-138 could directly target SOX4. Consistent with the effect of miR-138, downregulation of SOX4 by siRNA inhibited proliferation, invasion, and EMT of NSCLC cells. Overexpression of SOX4 in NSCLC cells partially reversed the effect of miR-138 mimic. In addition, decreased SOX4 expression could increase the level of miR-138 via upregulation of p53. Introduction of miR-138 dramatically inhibited growth, invasion, and EMT of NSCLC cells through a SOX4/p53 feedback loop.
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Affiliation(s)
- Dandan Li
- Department of Pediatrics, Cancer Hospital of the Harbin Medical UniversityHarbinP.R. China
| | - Changjun He
- Department of Thoracic Surgery, Cancer Hospital of the Harbin Medical UniversityHarbinP.R. China
| | - Junfeng Wang
- Department of Thoracic Surgery, Cancer Hospital of the Harbin Medical UniversityHarbinP.R. China
| | - Yanbo Wang
- Department of Thoracic Surgery, Cancer Hospital of the Harbin Medical UniversityHarbinP.R. China
| | - Jianlong Bu
- Department of Thoracic Surgery, Cancer Hospital of the Harbin Medical UniversityHarbinP.R. China
| | - Xianglong Kong
- Department of Thoracic Surgery, Cancer Hospital of the Harbin Medical UniversityHarbinP.R. China
| | - Dawei Sun
- Department of Thoracic Surgery, Cancer Hospital of the Harbin Medical UniversityHarbinP.R. China
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Zhang D, Liang H, Bu J, Xiong L, Huang S, Zhang DD, Liang HB, Bu J, Xiong L, Huang SM. UV curable soybean-oil hybrid systems based on thiol-acrylate and thiol-ene-acrylate chemistry. J Appl Polym Sci 2015. [DOI: 10.1002/app.42095] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Dandan Zhang
- School of Materials Science and Engineering; Nanchang Hangkong University; Nanchang 330063 People's Republic of China
| | - Hongbo Liang
- School of Materials Science and Engineering; Nanchang Hangkong University; Nanchang 330063 People's Republic of China
| | - Jiang Bu
- School of Materials Science and Engineering; Nanchang Hangkong University; Nanchang 330063 People's Republic of China
| | - Lei Xiong
- School of Materials Science and Engineering; Nanchang Hangkong University; Nanchang 330063 People's Republic of China
| | - Shengmei Huang
- School of Materials Science and Engineering; Nanchang Hangkong University; Nanchang 330063 People's Republic of China
| | - D. D. Zhang
- School of Materials Science and Engineering; Nanchang Hangkong University; Nanchang 330063 People's Republic of China
| | - H. B. Liang
- School of Materials Science and Engineering; Nanchang Hangkong University; Nanchang 330063 People's Republic of China
| | - J. Bu
- School of Materials Science and Engineering; Nanchang Hangkong University; Nanchang 330063 People's Republic of China
| | - L. Xiong
- School of Materials Science and Engineering; Nanchang Hangkong University; Nanchang 330063 People's Republic of China
| | - S. M. Huang
- School of Materials Science and Engineering; Nanchang Hangkong University; Nanchang 330063 People's Republic of China
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22
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Zhang P, Zhang B, Bu J, Liu Y, Zhang W. [Prospective analysis of the risk factors and clinical indications of dissection of lymph node posterior to right recurrent laryngeal nerve in 283 cases of papillary thyroid carcinoma]. Zhonghua Zhong Liu Za Zhi 2014; 36:109-114. [PMID: 24796458] [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: 06/03/2023]
Abstract
OBJECTIVE To investigate the risk factors for metastasis and clinical indications for dissection of lymph node posterior to right recurrent laryngeal nerve (LN-prRLN) in papillary thyroid carcinoma (PTC). METHODS A prospective analysis including 283 consecutive patients with PTC who underwent total thyroidectomy with routine central lymph node dissection (CLND) in our hospital from Jan. 2010 to Jan. 2012 was performed. The right paratracheal lymph nodes in the central compartment lymph nodes (CCLN) were divided into the anterior (level VIa) and posterior (level VIb) compartments by recurrent laryngeal nerve (RLN), and were removed respectively. The complications and recurrences were recorded with a follow-up of 3 months to 3 years. RESULTS CCLN metastases were present in 47.7% (135/283) of the patients, and level VIb metastases were present in 27.2% (77/283) of the patients. The incidence of level VIb metastasis was 20.5% (58/283) in level VIa-positive patients, while 6.7% (19/283) in level VIa-negative patients. Complications of level VIb dissection were found in 4.9% (14/283) of all patients. 2.1% (6/283) of all patients were diagnosed with regional recurrence during the 3-year follow-up. Univariate analysis revealed that level VIb metastasis was significantly associated with tumor size, number, extrathyroidal invasion, clinical nodal stage, level VIa and lateral lymph node metastases. Multivariate analysis revealed that tumor larger than 1 cm, multifocality, extrathyroidal invasion, level VIa and lateral lymph node metastases were independent risk factors for level VIb metastasis. CONCLUSIONS Lymph node posterior to right recurrent laryngeal nerve can be the only site of metastasis from PTC without other cervical compartment involvements. Therefore, routine intraoperative detection of these nodes may be necessary for patients with right PTC, and dissection should be considered when a right-side PTC tumor is larger than 1 cm, multifocality, with extrathyroidal invasion or cervical nodal metastases.
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Affiliation(s)
- Pinyi Zhang
- Department of General Surgery, the Second Hospital of Harbin Medical University, Harbin 150086, China
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Maeda A, Bu J, Chen E, DaCosta R. PD-0430: Studying the effect of radiation on vascular function and tumor microenvironment using intravital imaging. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)30535-1] [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: 10/23/2022]
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24
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Bu J, Zhan C, Huang Y, Shen B, Zhuo X. Distinguishing Heroin Abuse from Codeine Administration in the Urine of Chinese People by UPLC-MS-MS. J Anal Toxicol 2013; 37:166-74. [DOI: 10.1093/jat/bks093] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Abstract
BACKGROUND Treatment uptake and elapsed times along the care path have emerged as potential quality indicators for cancer care delivery. This retrospective study examined changes in adjuvant chemotherapy uptake and elapsed times along the care path for patients in 2005 and in 2007 who had early-stage non-small-cell lung cancer (nsclc) and who underwent curative-intent surgery in Nova Scotia, Canada. METHODS All patients who underwent curative-intent surgery for stages i-iii nsclc in the two years of interest were included. Logistic regression and general linear models were used to examine factors associated with chemotherapy uptake patterns and, at various resolutions (low, intermediate, high), elapsed times between all care events in the care path. RESULTS In the 223 patients who underwent curative-intent surgery (108 in 2005, 115 in 2007), several factors were associated with uptake patterns and elapsed times. Cohort year (2007 vs. 2005) was not associated with referral to medical oncology [odds ratio (or): 1.05; 95% confidence interval (ci): 0.51 to 2.15; p = 0.905], but it was associated with less treatment after referral (or: 0.34; 95% ci: 0.11 to 1.00; p = 0.057) and less overall uptake (or: 0.35; 95% ci: 0.13 to 0.95; p = 0.040). Patients were referred sooner to medical oncology in 2007 than in 2005 (21 days vs. 35 days, p = 0.008), but experienced longer waits between consultation and chemotherapy delivery (18 days vs. 7 days, p = 0.001). CONCLUSIONS Significant differences were observed in care patterns over time. Frequent monitoring of care patterns at high resolution may optimize insights into emerging trends within cancer care systems.
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Affiliation(s)
- S. Gray
- Division of Medical Oncology, Department of Medicine, QEII Health Sciences Centre, Halifax, NS
| | - J. Bu
- Surveillance and Epidemiology Unit, Cancer Care Nova Scotia, Halifax, NS
| | - N. Saint-Jacques
- Surveillance and Epidemiology Unit, Cancer Care Nova Scotia, Halifax, NS
| | - D. Rayson
- Division of Medical Oncology, Department of Medicine, QEII Health Sciences Centre, Halifax, NS
| | - T. Younis
- Division of Medical Oncology, Department of Medicine, QEII Health Sciences Centre, Halifax, NS
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Zhang QQ, Wang JG, Wang MW, Bu J, Zhu SW, Wang R, Gao BZ, Yuan XC. A modified fractal zone plate with extended depth of focus in spectral domain optical coherence tomography. J Opt 2011; 13:10.1088/2040-8978/13/5/055301. [PMID: 24353894 PMCID: PMC3864818 DOI: 10.1088/2040-8978/13/5/055301] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In optical coherence tomography (OCT) systems, there is a trade-off between the depth of focus (DOF) and lateral resolution when conventional lenses are used. We propose a new method that employs a modified fractal generalized zone plate (MFraGZP) combined with a conventional lens to improve the trade-off effect, with an extended DOF of about 2.5 mm (14 times larger) while the lateral resolution is maintained at ~9.5 μm. As an example, images of the calibration microspheres are obtained and demonstrated with the extended DOF in a spectral domain OCT system.
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Affiliation(s)
- Q Q Zhang
- Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science and Technology, Ministry of Education of China, Nankai University, Tianjin 300071, People’s Republic of China
| | - J G Wang
- Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science and Technology, Ministry of Education of China, Nankai University, Tianjin 300071, People’s Republic of China
| | - M W Wang
- Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science and Technology, Ministry of Education of China, Nankai University, Tianjin 300071, People’s Republic of China
| | - J Bu
- Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science and Technology, Ministry of Education of China, Nankai University, Tianjin 300071, People’s Republic of China
| | - S W Zhu
- Nankai University Affiliated Hospital, Tianjin 300121, People’s Republic of China
| | - R Wang
- Department of Bioengineering, Clemson University, Clemson, SC 29634, USA
| | - Bruce Z Gao
- Department of Bioengineering, Clemson University, Clemson, SC 29634, USA
| | - X-C Yuan
- Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science and Technology, Ministry of Education of China, Nankai University, Tianjin 300071, People’s Republic of China
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Yuan GH, Yuan XC, Bu J, Tan PS, Wang Q. Manipulation of surface plasmon polaritons by phase modulation of incident light. Opt Express 2011; 19:224-229. [PMID: 21263560 DOI: 10.1364/oe.19.000224] [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: 05/30/2023]
Abstract
Manipulation of surface plasmon polaritons (SPP) by phase modulation of incident light beams is proposed with analytical and numerical verifications when an optical vortex (OV) beam is employed as an example. Fundamental functionalities of a plasmonic chip such as in-plane focusing, coupling and multiplexing of SPP by sequentially varying the topological charge of OV beam are demonstrated. Complementary to the manually-controlled optical-path-different technique reported in literature, the proposed method reveals a direct phase transform from OV beam to SPP with dynamic and reconfigurable advantages.
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Affiliation(s)
- G H Yuan
- School of Electrical & Electronic Engineering, Nanyang Technological University, Singapore, Singapore
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28
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Khoo H, Bu J, Wong R, Kuan S, Sharratt P. Carbon capture and utilization: Preliminary life cycle CO2, energy, and cost results of potential mineral carbonation. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.egypro.2011.02.145] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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29
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Wang Q, Bu J, Yuan GH, Tan PS, Teng JH, Yuan XC. Deterministic relief dielectric structures to realize phase modulation of surface-plasmon polaritons. Opt Lett 2010; 35:4196-4198. [PMID: 21165135 DOI: 10.1364/ol.35.004196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We propose a modified effective-refractive-index model for the design of relief dielectric structures on a metal surface to realize phase modulation of surface-plasmon polaritons (SPPs). In this model, the length of the dielectric structure is optimized to reach phase shifting between the SPP waves transmitted through dielectric structure and those directly propagated with the consideration of SPP losses. Specifically, a one-dimensional dielectric Fresnel zone plate is designed by employing the proposed model to demonstrate phase modulation of SPPs for the highest focusing efficiency.
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Affiliation(s)
- Q Wang
- School of Electrical & Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798
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30
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Porter GA, Urquhart R, Bu J, Johnson P, Grunfeld E. The impact of audit and feedback on nodal harvest in colorectal cancer (CRC). J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.6017] [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: 11/20/2022] Open
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31
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Gray SL, Bu J, Saint-Jacques N, Rayson D, Younis T. Changes in chemotherapy uptake and wait times in early-stage non-small cell lung cancer (NSCLC). J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.6049] [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: 11/20/2022] Open
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32
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Urquhart R, Bu J, Porter GA, Dewar R, Moineddin R, Grunfeld E. Relationship between survival and lymph node assessment from a population-based study of colorectal cancer patients. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.6125] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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33
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Zhang DG, Yuan XC, Bu J, Yuan GH, Wang Q, Lin J, Zhang XJ, Wang P, Ming H, Mei T. Surface plasmon converging and diverging properties modulated by polymer refractive structures on metal films. Opt Express 2009; 17:11315-11320. [PMID: 19582045 DOI: 10.1364/oe.17.011315] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Polymer refractive microstructures are fabricated on metallic thin films and employed to modulate surface plasmons (SPs) propagations in a refractive manner. SP waves converging with different focal lengths and diverging effects are realized by the refractive structures. Authors investigated the modulation effect on SP waves as a function of different thicknesses and different shapes of the polymer micro-structures based on the effective refractive index model, where imaging properties of the SPs are observed experimentally by detecting the leaky radiation intensity of the SPs.
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Affiliation(s)
- D G Zhang
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore
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34
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Abstract
Surface plasmons excited by a focused femtosecond radially polarized beam on a metal surface form a standing wave pattern with a sharp peak that can be used as a "virtual probe" for surface plasmon microscopy. The rotational symmetry of radially polarized light effectively provides the TM polarization required for coupling to the surface plasmons while the short pulse nature of the probe allows for nonlinear processes to be studied.
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Affiliation(s)
- K. J. Moh
- School of Electrical & Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798, Singapore
| | - X.-C. Yuan
- Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science and Technology, Ministry of Education of China, Nankai University, Tianjin, 300071, China
- Corresponding author:
| | - J. Bu
- Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science and Technology, Ministry of Education of China, Nankai University, Tianjin, 300071, China
| | - S. W. Zhu
- Tianjin Union Medicine Centre, Tianjin 300121, China
| | - Bruce Z. Gao
- Department of Bioengineering, Clemson University, Clemson, South Carolina 29634, USA
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35
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Abstract
We demonstrate the proof-of-concept for surface plasmon resonance sensing and imaging via a virtual probe at the cell-substrate interface of a biological cell in aqueous media. The technique is based on the optical excitation by focused radially polarized beams of localized surface plasmons, which forms a virtual probe on the metal substrate. The intensity distribution at the back focal plane of the objective lens enables quantitative measurements to be made of the cell-substrate contact. The acquired data is then visualized in the form of a local refractive index map.
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Affiliation(s)
- K.J. Moh
- School of Electrical & Electronic Engineering, Nanyang Technological University, Nanyang Avenue, 639798, Singapore
| | - X.-C. Yuan
- Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science & Technology, Ministry of Education of China, Nankai University, Tianjin, 300071, China
- Corresponding author:
| | - J. Bu
- Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science & Technology, Ministry of Education of China, Nankai University, Tianjin, 300071, China
| | - S. W. Zhu
- Tianjin Union Medicine Centre, Tianjin 300121, China
| | - Bruce Z. Gao
- Department of Bioengineering and Center for Optical Materials Science and Engineering Technologies, Clemson University, 501-5 Rhodes Research Center, Clemson, South Carolina 29634, USA
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36
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Abstract
A multi-element design scheme is proposed to produce optical vortices of large spectrum width. The key component within the approach is a radially modulated spiral phase plate. Apart from a conventional spiral phase plate having an azimuthal phase function, the proposed element possesses an additional change of phase in the radial direction.
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Affiliation(s)
- X-C Yuan
- Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science & Technology, Ministry of Education of China, Nankai University, Tianjin 300071, China.
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37
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Yuan XC, Zhu SW, Bu J, Sun YY, Lin J, Gao BZ. Large-angular separation of particles induced by cascaded deflection angles in optical sorting. Appl Phys Lett 2008; 93:263901-363903. [PMID: 23997243 PMCID: PMC3757087 DOI: 10.1063/1.3040697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A composite microlens array (MLA) with two cascaded guiding axes has been fabricated to achieve a large lateral separation of an object with different refractive indices or sizes. The MLA projects a composite pattern formed by its focal spots into a microchamber for optical sorting in a microscopic system. This approach enables passive, high power, efficient, and continuous microfluidic sorting without requiring complicated optical assembly. Separation of particles with different refractive indices to a lateral angle of 40° is experimentally demonstrated with moderate laser power.
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Affiliation(s)
- X.-C. Yuan
- Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science and Technology, Ministry of Education of China, Nankai University, Tianjin 300071, China
| | - S. W. Zhu
- Tianjin Union Medicine Centre, Tianjin 300121, China
| | - J. Bu
- Institute of Modern Optics, Key Laboratory of Optoelectronic Information Science and Technology, Ministry of Education of China, Nankai University, Tianjin 300071, China
| | - Y. Y. Sun
- School of Electrical & Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798, Singapore
| | - J. Lin
- School of Electrical & Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798, Singapore
| | - Bruce Z. Gao
- Department of Bioengineering and Center for Optical Materials Science and Engineering Technologies, Clemson University, Clemson, South Carolina 29634, USA
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38
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Moh KJ, Yuan XC, Bu J, Burge RE, Gao BZ. Generating radial or azimuthal polarization by axial sampling of circularly polarized vortex beams. Appl Opt 2007; 46:7544-7551. [PMID: 17952194 DOI: 10.1364/ao.46.007544] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A laser beam with circular polarization can be converted into either radial or azimuthal polarization by a microfabricated spiral phase plate and a radial (or azimuthal)-type linear analyzer. The resulting polarization is axially symmetric and is able to produce tightly focused light fields beyond the diffraction limit. We describe in detail the theory behind the technique and the experimental verification of the polarization both in the far field and at the focus of a high numerical aperture lens. Vector properties of the beam under strong focusing conditions were observed by comparing the fluorescence images corresponding to the focal intensity distribution for both radial and azimuthal polarizations. The technique discussed here may easily be implemented to a wide range of optical instruments and devices that require the use of tightly focused light beams.
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Affiliation(s)
- K J Moh
- Photonics Research Centre, School of Electrical & Electronic Engineering, Nanyang Technological University, Singapore
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39
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Lin J, Yuan XC, Bu J, Ahluwalia BP, Sun YY, Burge RE. Selective generation of high-order optical vortices from a single phase wedge. Opt Lett 2007; 32:2927-2929. [PMID: 17938655 DOI: 10.1364/ol.32.002927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We demonstrate that it is possible to generate high-order optical vortices from a single phase wedge by applying an incident beam with an annular intensity distribution. Various topological charges of optical vortices are realized by a static phase wedge when the position and radius of the annular illumination are changed accordingly.
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Affiliation(s)
- J Lin
- Photonics Research Centre, School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798
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40
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Lin J, Yuan XC, Bu J, Chen HL, Sun YY, Burge RE. Generalized model for orbital angular momentum states generated by parallel aligned phase wedges. Opt Lett 2007; 32:2170-2. [PMID: 17671573 DOI: 10.1364/ol.32.002170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
A generalized model of a double-wedge phase element containing two side-by-side parallel phase ramps with arbitrary slope angles is proposed. We study the diffracted optical field of a double-wedge element in terms of orbital angular momentum states. Analytical calculations reveal how the radius and position of the illuminating laser beam affect the composition of orbital angular momentum generated by the phase wedges.
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Affiliation(s)
- J Lin
- Photonics Research Centre, School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore
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41
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Shen L, He B, Zeng J, Zhou L, Hu L, Wang L, Bu J, Wang B. PO9-263 OXIDIZED LOW-DENSITY LIPOPROTEIN INDUCES DIFFERENTIATION OF RAW264. 7 MURINE MACROPHAGE CELL LINE INTO DENDRITIC LIKE CELLS. ATHEROSCLEROSIS SUPP 2007. [DOI: 10.1016/s1567-5688(07)71273-4] [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: 10/23/2022]
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42
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He M, Yuan XC, Bu J, Ong BH. Improved silica-zirconia sol synthesis for fabrication of a single-mode embedded dielectric channel waveguide with low transmission losses. Appl Opt 2007; 46:302-6. [PMID: 17228373 DOI: 10.1364/ao.46.000302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
A novel inorganic-organic hybrid silica-zirconia solgel material, which can generate 10 microm thick film in a single spin-coating process, has been developed and employed in the fabrication of an embedded dielectric channel waveguide on a silica buffer layer of a silicon substrate. The fabricated channel waveguide core had steep ridge walls, good smoothness, and high robustness, and the novel sol synthesis enabled a precise control of the geometrical and optical parameters of the embedded dielectric channel waveguide. In the 1.55 microm telecommunication window, the fundamental modes TE(00) and TM(00) in the embedded channel waveguide had low transmission losses of 0.40 +/- 0.03 dB/cm and 0.59 +/- 0.03 dB/cm, respectively.
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Affiliation(s)
- M He
- Nanyang Technologial University, Singapore.
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43
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Ahluwalia BPS, Cheong WC, Yuan XC, Zhang LS, Tao SH, Bu J, Wang H. Design and fabrication of a double-axicon for generation of tailorable self-imaged three-dimensional intensity voids. Opt Lett 2006; 31:987-9. [PMID: 16599233 DOI: 10.1364/ol.31.000987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
We propose a new design for fabrication of a highly power-efficient double axicon to generate self-imaged three-dimensional intensity voids along the propagation of a beam. The conventional conical structure of an axicon is modified and shaped like an axiconlike structure with a double-gradient surface profile. The gradient conical surfaces generate Bessel beams with varying radial wave vectors that are superimposed and interfere to generate a sequence of three-dimensional intensity voids. The proposed element was fabricated using electron-beam lithography, and experimental verification of the design is reported.
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Affiliation(s)
- B P S Ahluwalia
- School of Electrical & Electronic Engineering, Nanyang-Technological University, Nanyang Avenue, Singapore 639798, Singapore
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44
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Kang J, Bu J, Hao Y, Chen F. Subtoxic concentration of doxorubicin enhances TRAIL-induced apoptosis in human prostate cancer cell line LNCaP. Prostate Cancer Prostatic Dis 2005; 8:274-9. [PMID: 15897917 DOI: 10.1038/sj.pcan.4500798] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Most tumor cells are sensitive to tumor necrosis factor-related apoptosis-inducing ligand (TRAIL)-induced apoptosis but sparing to normal cells, thus providing therapeutic potential for clinical use. Some tumor cells are resistant to TRAIL-induced cell death while the sensitivity could be recruited with the existence of some chemical agents. In this study, human prostatic cancer cell line LNCaP was found to be resistant to TRAIL-induced apoptosis while it could be restored to TRAIL sensitivity with combination treatment of low concentration of doxorubicin. TRAIL receptor-1 (DR4) and TRAIL receptor-2 (DR5) were upregulated under the treatment of doxorubicin and verified to be responsible for TRAIL-mediated signal transduction. Furthermore, caspase-8 and caspase-3 were activated and drove their autocleavage into programmed cell death. Interestingly, apoptosis-inhibitory protein c-FLIP, but not Bcl-2 and XIAP was downregulated after doxorubicin treatment. Taken together, these findings suggested that the pathway of cell apoptosis induced by TRAIL was intact but under negative control. Subtoxic concentration of doxorubicin effectively boosted TRAIL sensitivity via depletion of antiapoptotic protein. These findings support the new strategies for killing tumors with TRAIL and chemical agents.
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Affiliation(s)
- J Kang
- Department of Urology, Xinhua hospital, Shanghai Second Medical University, Shanghai, PR China.
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45
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He M, Yuan XC, Ngo N, Bu J, Tao S. Low-cost and efficient coupling technique using reflowed sol-gel microlens. Opt Express 2003; 11:1621-1627. [PMID: 19466040 DOI: 10.1364/oe.11.001621] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In this paper, we present a novel reflow technique for the fabrication of an elliptical microlens array in sol-gel glass. The fabricated refractive microlens array has a very smooth surface, and structural and dimensional conformity with the designed parameters. It is shown that the microlens array can provide high coupling efficiency of a laser diode to a single mode fiber, and relax the lateral and axial misalignment tolerance. The microlens coupling technique has the advantages of low coupling loss, large misalignment tolerances, and small package volume.
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46
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Tao SH, Yuan X, Cheong W, Bu J, Kudryashov V. Optimized polarization-selective computer-generated hologram with fewer phase combinations. Opt Express 2003; 11:1252-1257. [PMID: 19465991 DOI: 10.1364/oe.11.001252] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Normally, to incorporate two binary conventional computer-generated holograms (CGHs) into a single polarization-selective computer-generated hologram (PSCGH), the respective pixels of the conventional CGHs will result in 4 different combinations of the phase values. Thus, the 4 phase combinations have to be realized by 4 types of pixel structures in a PSCGH. In this paper, we propose a method to reduce the PSCGH's 4 phase combinations to 3 using an optimization approach. The PSCGH's first-order diffraction efficiency is 30% and the contrast ratio is 28 after the optimization.
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47
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Abstract
A simple reflow method for fabrication of refractive microlens arrays in inorganic-organic SiO2-ZrO2 solgel glass is presented. To our knowledge, this is the first report that presents a simple reflow technique for transforming a negatively induced hybrid solgel material into desirable spherical microlenses. It is shown that the microlenses have excellent smooth surfaces and uniform dimensions. The reflow technique is considerably cheaper than use of a high-energy beam-sensitive gray-scale mask and is suitable for mass production.
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Affiliation(s)
- M He
- School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798
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48
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Bu J, Song Y, Rompato G, Burgess DJ, Garmendia AE. Co-delivery of IL-2 or liposomes augment the responses of mice to a DNA vaccine for pseudorabies virus IE180. Comp Immunol Microbiol Infect Dis 2003; 26:175-87. [PMID: 12581747 DOI: 10.1016/s0147-9571(02)00050-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Recently we have demonstrated, with a DNA vaccine, that the immediate early protein (IE180) of pseudorabies virus provides a moderate level of protection in mice. In order to improve its immunogenicity and protective capacity, this IE180 DNA vaccine was delivered to C3H/HeJ mice either in combination with an IL-2 expressing plasmid or complexed with cationic liposomes. Co-delivery of the vaccine and IL-2 DNA by gene gun resulted in seroconversion in 5/5 of the vaccinated mice after a single administration, whereas two intramuscular (i.m.) injections were required to achieve seroconversion in all mice. Antibody and delayed-type hypersensitivity responses were augmented in mice, which received the DNA vaccine and the IL-2 gene compared to those of mice receiving the DNA vaccine alone. In addition, the time of death after challenge was significantly delayed in mice, which received the IL-2 gene. The proportion of surviving mice (40%), however, was similar to that obtained in mice which received the vaccine alone by gene gun. Liposome-mediated vaccine delivery also resulted in a higher rate of seroconversion when compared with that induced by the naked DNA vaccine. Thus, all vaccinated mice seroconverted after either two i.v. or three i.m. injections of the liposome/DNA complex, with 40 and 25% of these mice being protected against challenge, respectively. These data support that co-administration of the IE180 DNA vaccine with the IL-2 gene or delivery in liposomes are two effective approaches to increase its immunogenicity.
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MESH Headings
- Animals
- Antibodies, Viral/biosynthesis
- Antibodies, Viral/blood
- Female
- Genetic Vectors
- Herpesvirus 1, Suid/immunology
- Hypersensitivity, Delayed
- Immediate-Early Proteins/immunology
- Injections, Intramuscular/veterinary
- Injections, Intravenous/veterinary
- Interleukin-2/administration & dosage
- Interleukin-2/genetics
- Interleukin-2/immunology
- Liposomes
- Mice
- Mice, Inbred C3H
- Pseudorabies/prevention & control
- Pseudorabies Vaccines/administration & dosage
- Pseudorabies Vaccines/genetics
- Pseudorabies Vaccines/immunology
- Vaccines, DNA/administration & dosage
- Vaccines, DNA/genetics
- Vaccines, DNA/immunology
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Affiliation(s)
- J Bu
- Department of Pathobiology and Veterinary Science, University of Connecticut, Storrs, CT 06269, USA
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49
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50
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Shen M, Xiang P, Huang Z, Liu W, Shen B, Bu J. [Abuse of "pheticol" and its interference to the analysis of methamphetamine]. Fa Yi Xue Za Zhi 2002; 14:129-31, 190. [PMID: 11938882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
The study was to eliminate interference from ephedrine in the analysis of methamphetamine. The extraction procedure for methamphetamine was modified to include an oxidation step (2 ml urine specimen was treated with 0.5 ml of 1 mol/L phosphate buffer (pH 6.8) and 0.5 ml 0.3 mol/L sodium periodate). Results showed that ephedrine could be oxidized in the presence of periodate ions into smaller fragments while leaving methamphetamine intact. It is recommended that specimens be treated with sodium periodate prior to extraction in order to eliminate any interference caused by ephedrine.
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