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Wei Z, Liu J, Hui G, Luan X. Circ_0020123 promotes non-small cell lung cancer progression via miR-146a-5p mediated regulation of EIF4G2 expression. Thorac Cancer 2024; 15:44-56. [PMID: 37993106 PMCID: PMC10761619 DOI: 10.1111/1759-7714.15159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 10/27/2023] [Accepted: 10/30/2023] [Indexed: 11/24/2023] Open
Abstract
BACKGROUND Circular RNAs (circRNAs) have been reported to be involved in the initiation and development of cancers. The aim of this study was to determine the role of a circRNA, circ_0020123, in the development of non-small cell lung cancer (NSCLC). METHODS The expression of circ_0020123, microRNA-146a-5p (miR-146a-5p), and eukaryotic translation initiation factor 4 gamma 2 (EIF4G2) mRNA was detected by quantitative real-time PCR (qPCR). Western blot was used to determine the protein levels of cyclin D1, Bax, MMP-9, and EIF4G2. Cell proliferation was assessed by cell counting kit-8 (CCK-8) assay and colony formation assay. Flow cytometry assay was applied to determine cell cycle apoptosis. Cell migration and invasion were assessed using transwell assay. The potential relationship between miR-146a-5p and circ_0020123 or EIF4G2 was ascertained by dual-luciferase reporter assay and RIP assay. The role of circ_0020123 in vivo was explored by xenograft assay. RESULTS Circ_0020123 was upregulated in NSCLC, and circ_0020123 knockdown repressed proliferation, migration, and invasion of NSCLC cells. Circ_0020123 targeted miR-146a-5p, and miR-146a-5p inhibitor reversed the effects of circ_0020123 knockdown on NSCLC cells. In addition, miR-146a-5p suppressed cell proliferation, migration, and invasion by targeting EIF4G2. Moreover, the antitumor role of circ_0020123 knockdown was verified in vivo. CONCLUSION Knockdown of circ_0020123 inhibited NSCLC cell progression and tumor growth by targeting the miR-146a-5p/EIF4G2 axis.
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Affiliation(s)
- Zichun Wei
- Department of Thoracic SurgeryPeking University Shenzhen HospitalShenzhenChina
| | - Jixian Liu
- Department of Thoracic SurgeryPeking University Shenzhen HospitalShenzhenChina
| | - Gang Hui
- Department of Thoracic SurgeryPeking University Shenzhen HospitalShenzhenChina
| | - Xinyu Luan
- Department of Thoracic SurgeryPeking University Shenzhen HospitalShenzhenChina
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Chen C, Guo Q, Liu Y, Hou Q, Liao M, Guo Y, Zang Y, Wang F, Liu H, Luan X, Liang Y, Guan Z, Li Y, Liu H, Dong X, Zhang X, Liu J, Xu Q. Single-cell and spatial transcriptomics reveal POSTN + cancer-associated fibroblasts correlated with immune suppression and tumour progression in non-small cell lung cancer. Clin Transl Med 2023; 13:e1515. [PMID: 38115703 PMCID: PMC10731139 DOI: 10.1002/ctm2.1515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 11/27/2023] [Accepted: 12/01/2023] [Indexed: 12/21/2023] Open
Abstract
BACKGROUND Cancer-associated fibroblasts (CAFs) are potential targets for cancer therapy. Due to the heterogeneity of CAFs, the influence of CAF subpopulations on the progression of lung cancer is still unclear, which impedes the translational advances in targeting CAFs. METHODS We performed single-cell RNA sequencing (scRNA-seq) on tumour, paired tumour-adjacent, and normal samples from 16 non-small cell lung cancer (NSCLC) patients. CAF subpopulations were analyzed after integration with published NSCLC scRNA-seq data. SpaTial enhanced resolution omics-sequencing (Stereo-seq) was applied in tumour and tumour-adjacent samples from seven NSCLC patients to map the architecture of major cell populations in tumour microenvironment (TME). Immunohistochemistry (IHC) and multiplexed IHC (mIHC) were used to validate marker gene expression and the association of CAFs with immune infiltration in TME. RESULTS A subcluster of myofibroblastic CAFs, POSTN+ CAFs, were significantly enriched in advanced tumours and presented gene expression signatures related to extracellular matrix remodeling, tumour invasion pathways and immune suppression. Stereo-seq and mIHC demonstrated that POSTN+ CAFs were in close localization with SPP1+ macrophages and were associated with the exhausted phenotype and lower infiltration of T cells. POSTN expression or the abundance of POSTN+ CAFs were associated with poor prognosis of NSCLC. CONCLUSIONS Our study identified a myofibroblastic CAF subpopulation, POSTN+ CAFs, which might associate with SPP1+ macrophages to promote the formation of desmoplastic architecture and participate in immune suppression. Furthermore, we showed that POSTN+ CAFs associated with cancer progression and poor clinical outcomes and may provide new insights on the treatment of NSCLC.
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Affiliation(s)
- Chao Chen
- Department of Thoracic SurgeryPeking University Shenzhen HospitalShenzhen Peking University‐The Hong Kong University of Science and Technology Medical CenterShenzhenChina
| | - Qiang Guo
- BGI ResearchHangzhouChina
- BGI ResearchShenzhenChina
- College of Life SciencesUniversity of Chinese Academy of SciencesBeijingChina
| | - Yang Liu
- BGI ResearchHangzhouChina
- BGI ResearchShenzhenChina
- College of Life SciencesUniversity of Chinese Academy of SciencesBeijingChina
| | - Qinghua Hou
- Department of Thoracic SurgeryPeking University Shenzhen HospitalShenzhen Peking University‐The Hong Kong University of Science and Technology Medical CenterShenzhenChina
| | - Mengying Liao
- Department of PathologyPeking University Shenzhen HospitalShenzhenChina
| | - Yanying Guo
- BGI ResearchHangzhouChina
- BGI ResearchShenzhenChina
| | - Yupeng Zang
- College of Life SciencesUniversity of Chinese Academy of SciencesBeijingChina
| | | | - Huanyu Liu
- Department of PathologyPeking University Shenzhen HospitalShenzhenChina
| | - Xinyu Luan
- Department of Thoracic SurgeryPeking University Shenzhen HospitalShenzhen Peking University‐The Hong Kong University of Science and Technology Medical CenterShenzhenChina
| | - Yanling Liang
- BGI ResearchShenzhenChina
- College of Life SciencesUniversity of Chinese Academy of SciencesBeijingChina
| | - Zhuojue Guan
- College of Life SciencesUniversity of Chinese Academy of SciencesBeijingChina
| | - Yanling Li
- Central Laboratory of Peking University Shenzhen HospitalShenzhenChina
| | - Haozhen Liu
- Department of Thoracic SurgeryPeking University Shenzhen HospitalShenzhen Peking University‐The Hong Kong University of Science and Technology Medical CenterShenzhenChina
| | - Xuan Dong
- BGI ResearchHangzhouChina
- BGI ResearchShenzhenChina
- Guangdong Provincial Key Laboratory of Human Disease Genomics, Shenzhen Key Laboratory of GenomicsBGI ResearchShenzhenChina
| | - Xiuqing Zhang
- BGI ResearchShenzhenChina
- Guangdong Provincial Key Laboratory of Human Disease Genomics, Shenzhen Key Laboratory of GenomicsBGI ResearchShenzhenChina
| | - Jixian Liu
- Department of Thoracic SurgeryPeking University Shenzhen HospitalShenzhen Peking University‐The Hong Kong University of Science and Technology Medical CenterShenzhenChina
| | - Qumiao Xu
- BGI ResearchHangzhouChina
- BGI ResearchShenzhenChina
- Guangdong Provincial Key Laboratory of Human Disease Genomics, Shenzhen Key Laboratory of GenomicsBGI ResearchShenzhenChina
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Wu L, Liu Q, Ruan X, Luan X, Zhong Y, Liu J, Yan J, Li X. Multiple Omics Analysis of the Role of RBM10 Gene Instability in Immune Regulation and Drug Sensitivity in Patients with Lung Adenocarcinoma (LUAD). Biomedicines 2023; 11:1861. [PMID: 37509501 PMCID: PMC10377220 DOI: 10.3390/biomedicines11071861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 06/22/2023] [Accepted: 06/23/2023] [Indexed: 07/30/2023] Open
Abstract
OBJECTIVE The RNA-binding protein RBM10 can regulate apoptosis during the proliferation and migration of pancreatic cancer, endometrial cancer, and osteosarcoma cells; however, the molecular mechanism underlying lung adenocarcinoma is rarely reported. Recent studies have detected multiple truncated and missense mutations in RBM10 in lung adenocarcinoma, but the role of RBM10 in lung adenocarcinoma is unclear. This study mainly explored the immune regulation mechanism of RBM10 in the development of lung adenocarcinoma and its influence on sensitivity to targeted therapy drugs. METHODS The transcriptome data of CGAP were used to analyze the RNA-seq data of lung adenocarcinoma patients from different subgroups by using the CIBERSORT algorithm to infer the relative proportion of various immune infiltrating cells, and Spearman correlation analysis was performed to determine the gene expression and immune cell content. In addition, this study utilized drug trial data from the GDSC database. The IC50 estimates for each specific targeted therapy were obtained by using a regression method, and the regression and prediction accuracy were tested via ten cross-validations with the GDSC training set. An immunohistochemical test was performed on the samples of 20 patients with lung adenocarcinoma in the subcomponent analysis of immune cells, and the protein expression of RBM10 in lung adenocarcinoma tissues was verified by cellular immunofluorescence assays. Nucleic acids were extracted at low temperatures, and qRT-PCR was used to verify the expression levels of the mRNA of RBM10 in lung adenocarcinoma tissues and normal tissues (p < 0.05). RESULTS After screening and inclusion using a machine language, the results showed that RBM10 was significantly highly expressed in the lung adenocarcinoma tissues. The related signaling pathways were mainly concentrated in ncRNA processing, rRNA metabolic processes, ribosome biogenesis, and the regulation of translation. The qRT-PCR for 20 lung adenocarcinoma tissues showed that the expression of RBM10 in these tissues was significantly different from that in normal tissues (p = 0.0255). Immunohistochemistry analysis and cell immunofluorescence staining also confirmed that RBM10 was involved in the immune regulation of lung adenocarcinoma tissues, and the number of immune cell aggregations was significantly higher than that of the control group. RBM10 regulates B cell memory-CIBERSORT (p = 0.042) and B cell memory-CIBERSOTRT-abs (p = 0.027), cancer-associated fibroblast-EPIC (p = 0.001), cancer-associated fibroblast- MCPCounter (p = 0.0037), etc. The risk score was significantly associated with the sensitivity of patients to lapatinib (p = 0.049), nilotinib (p = 0.015), pazopanib (p = 0.001), and sorafenib (p = 0.048). CONCLUSIONS RBM10 can inhibit the proliferation and invasion of lung adenocarcinoma cells through negative regulation and promote the apoptosis of lung adenocarcinoma cells through immunomodulatory mechanisms. The expression level of RBM10 affects the efficacy of targeted drug therapy and the survival prognosis of lung adenocarcinoma patients, which has a certain guiding significance for the clinical treatment of these patients.
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Affiliation(s)
- Liusheng Wu
- Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing 100084, China
- Department of Graduate School, Anhui Medical University, Hefei 230032, China
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, Shenzhen 518036, China
| | - Qi Liu
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, Shenzhen 518036, China
| | - Xin Ruan
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, Shenzhen 518036, China
| | - Xinyu Luan
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, Shenzhen 518036, China
| | - Yanfeng Zhong
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, Shenzhen 518036, China
| | - Jixian Liu
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, Shenzhen 518036, China
| | - Jun Yan
- Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing 100084, China
| | - Xiaoqiang Li
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, Shenzhen 518036, China
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Luan X, Gao Z, Sun J, Chen G, Yan S, Yu H, Song H, Yao J, Song P. Feasibility of an ultra-low dose contrast media protocol for coronary CT angiography. Clin Radiol 2022; 77:e705-e710. [PMID: 35778294 DOI: 10.1016/j.crad.2022.05.029] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 05/30/2022] [Accepted: 05/30/2022] [Indexed: 11/25/2022]
Abstract
AIM To evaluate the feasibility of an ultra-low volume contrast media (CM) protocol for coronary computed tomography angiography (CTA). MATERIALS AND METHODS In total, 214 patients receiving coronary CTA were enrolled prospectively and divided into group A (n=107) receiving a conventional dose of CM and group B (n=107) receiving an ultra-low dose. CT values of the right coronary artery (RCA), left anterior descending artery (LAD), and left circumflex artery (LCX) were measured and radiation doses recorded. The image quality was compared between the groups. Changes in renal function indices and proteinuria before, 24, and 72 hours after coronary CTA among those with chronic kidney disease (CKD) were also assessed. RESULTS There were significant differences in CT values and radiation doses between groups A and B. In group A, the average RCA, LAD, and LCX CT values were 412.5 ± 79.2, 423.5 ± 73.7, and 422.0 ± 88.1 HU, respectively. In group B, the average RCA, LAD, and LCX CT values were 275.2 ± 16.2, 277.8 ± 16.4, and 278.9 ± 16.5 HU, respectively. The radiation dose in the ultra-low protocol recipients (118.70 ± 18.52 mGy·cm) was significantly lower than that used in conventional coronary CTA (131.75 ± 20.96 mGy·cm). The image quality of group B was comparable to that of group A, satisfying the diagnostic requirement. In patients with mild CKD, there were no significant differences in renal functions after coronary CTA. CONCLUSION An ultra-low CM protocol was established for coronary CTA, providing comparable image quality and diagnostic yields but significantly lower radiation dose compared with a conventional protocol. This new protocol might be applicable to patients with mild CKD.
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Affiliation(s)
- X Luan
- Weifang Medical University, Weifang 261053, China; Jinan Central Hospital, Jinan 250013, China
| | - Z Gao
- Department of Radiology, Central Hospital Affiliated to Shandong First Medical University, Jinan 250013, China; Department of Radiology, Jinan Central Hospital, Cheeloo College of Medicine, Shandong University, Jinan 250013, China
| | - J Sun
- Department of Radiology, Central Hospital Affiliated to Shandong First Medical University, Jinan 250013, China; Department of Radiology, Jinan Central Hospital, Cheeloo College of Medicine, Shandong University, Jinan 250013, China
| | - G Chen
- Department of Radiology, Central Hospital Affiliated to Shandong First Medical University, Jinan 250013, China; Department of Radiology, Jinan Central Hospital, Cheeloo College of Medicine, Shandong University, Jinan 250013, China
| | - S Yan
- Department of Radiology, Central Hospital Affiliated to Shandong First Medical University, Jinan 250013, China
| | - H Yu
- Department of Radiology, Central Hospital Affiliated to Shandong First Medical University, Jinan 250013, China
| | - H Song
- The Institute for Tissue Engineering and Regenerative Medicine, The Liaocheng University/liaocheng People's Hospital, Liaocheng 252000, China
| | - J Yao
- Department of Radiology, Central Hospital Affiliated to Shandong First Medical University, Jinan 250013, China; Department of Radiology, Provincial Hospital Affiliated to Shandong First Medical University, Jinan 250021, China
| | - P Song
- Department of Radiology, Central Hospital Affiliated to Shandong First Medical University, Jinan 250013, China; Department of Radiology, Jinan Central Hospital, Cheeloo College of Medicine, Shandong University, Jinan 250013, China.
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Li L, Li Y, Yang K, Li M, Luan X, Sun Y, Wang H, Sun Q, Tang K, Zheng H, Cui M, Xu W. Adsorption of methylene blue by Nicandra physaloides(L.) Gaertn seed gum/graphene oxide aerogel. Environ Technol 2022; 43:2342-2351. [PMID: 33446065 DOI: 10.1080/09593330.2021.1877361] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Accepted: 01/09/2021] [Indexed: 06/12/2023]
Abstract
In this study, a novel composite aerogel of Nicandra physaloides(L.) Gaertn seed, gum/graphene oxide (NPG/GO), was prepared by using a vacuum freeze drying method for methylene blue (MB) adsorption. The techniques, including Brunauer-Emmett-Teller (BET), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR), were adopted for studying the structure and surface characteristics of NPG/GO, with thermogravimetric analysis (TGA) being adopted for testing thermal properties. The effects of pH value, initial dye concentration, temperature and adsorbent dosage on adsorption performance were elaborately analysed. The adsorption kinetic studies showed that the process of adsorption follows Langmuir isotherm and a pseudo-second-order kinetic model. When the mass ratio of NPG to GO was 1.25:1, the adsorption capacity was the highest. According to Langmuir isotherm, the maximum adsorption capacity of 408.16 mg/g was higher than that of NPG. The specific surface area and average pore diameter of NPG/GO was measured as 2.70 m2/g and 4.8 nm, respectively. Thermodynamic analysis revealed that the adsorption process of methylene blue on NPG/GO was a spontaneous and endothermic process. In general, the prepared nanocomposites were excellent candidates for adsorption and removal process because of simple synthesis, low cost, high efficiency, non-toxicity, environment protection and degradability.
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Affiliation(s)
- Liubo Li
- State Key Laboratory of Bio-fibers and Eco-textiles, College of Mechanical and Electrical Engineering, Qingdao University, Qingdao, People's Republic of China
| | - Yanhui Li
- State Key Laboratory of Bio-fibers and Eco-textiles, College of Mechanical and Electrical Engineering, Qingdao University, Qingdao, People's Republic of China
- College of Materials Science and Engineering, Qingdao University, Qingdao, People's Republic of China
| | - Kai Yang
- College of Materials Science and Engineering, Qingdao University, Qingdao, People's Republic of China
| | - Meixiu Li
- College of Materials Science and Engineering, Qingdao University, Qingdao, People's Republic of China
| | - Xinyu Luan
- State Key Laboratory of Bio-fibers and Eco-textiles, College of Mechanical and Electrical Engineering, Qingdao University, Qingdao, People's Republic of China
| | - Yong Sun
- State Key Laboratory of Bio-fibers and Eco-textiles, College of Mechanical and Electrical Engineering, Qingdao University, Qingdao, People's Republic of China
| | - Huimin Wang
- State Key Laboratory of Bio-fibers and Eco-textiles, College of Mechanical and Electrical Engineering, Qingdao University, Qingdao, People's Republic of China
| | - Qinye Sun
- College of Materials Science and Engineering, Qingdao University, Qingdao, People's Republic of China
| | - Kaili Tang
- State Key Laboratory of Bio-fibers and Eco-textiles, College of Mechanical and Electrical Engineering, Qingdao University, Qingdao, People's Republic of China
| | - Heng Zheng
- College of Materials Science and Engineering, Qingdao University, Qingdao, People's Republic of China
| | - Mingfei Cui
- State Key Laboratory of Bio-fibers and Eco-textiles, College of Mechanical and Electrical Engineering, Qingdao University, Qingdao, People's Republic of China
| | - Wenshuo Xu
- State Key Laboratory of Bio-fibers and Eco-textiles, College of Mechanical and Electrical Engineering, Qingdao University, Qingdao, People's Republic of China
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Luan X, Herriot F, Le Y, Ianowski J, Tam J. 396: Activating TRPV1 and TRPM8 receptors in airway enhances intensity and duration of hypertonic saline treatment in swine airway. J Cyst Fibros 2021. [DOI: 10.1016/s1569-1993(21)01820-8] [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: 10/20/2022]
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Le Y, Luan X, Tam J, Ianowski J. 371: Airway ionocytes’ function is bicarbonate transport, whereas secretory cells’ is in fluid secretion. J Cyst Fibros 2021. [DOI: 10.1016/s1569-1993(21)01795-1] [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: 10/20/2022]
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Ma W, Lyu H, Pandya M, Gopinathan G, Luan X, Diekwisch TGH. Successful Application of a Galanin-Coated Scaffold for Periodontal Regeneration. J Dent Res 2021; 100:1144-1152. [PMID: 34328037 DOI: 10.1177/00220345211028852] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
The nervous system exerts finely tuned control over all aspects of the life of an organism, including pain, sensation, growth, and development. Recent developments in tissue regeneration research have increasingly turned to small molecule peptides to tailor and augment the biological response following tissue loss or injury. In the present study, we have introduced the small molecule peptide galanin (GAL) as a novel scaffold-coating agent for the healing and regeneration of craniofacial tissues. Using immunohistochemistry, we detected GAL and GAL receptors in healthy periodontal tissues and in the proximity of blood vessels, while exposure to our periodontal disease regimen resulted in a downregulation of GAL. In a 3-dimensional bioreactor culture, GAL coating of collagen scaffolds promoted cell proliferation and matrix synthesis. Following subcutaneous implantation, GAL-coated scaffolds were associated with mineralized bone-like tissue deposits, which reacted positively for alizarin red and von Kossa, and demonstrated increased expression and protein levels of RUNX2, OCN, OSX, and iBSP. In contrast, the GAL receptor antagonist galantide blocked the effect of GAL on Runx2 expression and inhibited mineralization in our subcutaneous implantation model. Moreover, GAL coating promoted periodontal regeneration and a rescue of the periodontal defect generated in our periodontitis model mice. Together, these data demonstrate the efficacy of the neuropeptide GAL as a coating material for tissue regeneration. They are also suggestive of a novel role for neurogenic signaling pathways in craniofacial and periodontal regeneration.
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Affiliation(s)
- W Ma
- Texas A&M Center for Craniofacial Research and Diagnosis and Department of Periodontics, TAMU College of Dentistry, Dallas, TX, USA.,Department of Stomatology, The Fourth Affiliated Hospital, Harbin Medical University, Harbin, China
| | - H Lyu
- Texas A&M Center for Craniofacial Research and Diagnosis and Department of Periodontics, TAMU College of Dentistry, Dallas, TX, USA.,Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Stomatology Hospital of Guangzhou Medical University, Guangzhou, China
| | - M Pandya
- Texas A&M Center for Craniofacial Research and Diagnosis and Department of Periodontics, TAMU College of Dentistry, Dallas, TX, USA
| | - G Gopinathan
- Texas A&M Center for Craniofacial Research and Diagnosis and Department of Periodontics, TAMU College of Dentistry, Dallas, TX, USA
| | - X Luan
- Texas A&M Center for Craniofacial Research and Diagnosis and Department of Periodontics, TAMU College of Dentistry, Dallas, TX, USA
| | - T G H Diekwisch
- Texas A&M Center for Craniofacial Research and Diagnosis and Department of Periodontics, TAMU College of Dentistry, Dallas, TX, USA
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Liu J, Luo R, Wang J, Luan X, Wu D, Chen H, Hou Q, Mao G, Li X. Tumor Cell-Derived Exosomal miR-770 Inhibits M2 Macrophage Polarization via Targeting MAP3K1 to Inhibit the Invasion of Non-small Cell Lung Cancer Cells. Front Cell Dev Biol 2021; 9:679658. [PMID: 34195198 PMCID: PMC8236888 DOI: 10.3389/fcell.2021.679658] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [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: 03/12/2021] [Accepted: 05/10/2021] [Indexed: 01/06/2023] Open
Abstract
Background Non-small cell lung carcinoma (NSCLC) is a type lung cancer with high malignant behaviors. MicroRNAs (miRNAs) are known to be involved in progression of NSCLC. In order to explore potential targets for the treatment of NSCLC, bioinformatics tool was used to analyze differential expressed miRNAs between NSCLC and adjacent normal tissues. Methods Bioinformatics tool was used to find potential targets for NSCLC. Cell proliferation was investigated by Ki67 staining. Cell apoptosis was measured by flow cytometry. mRNA and protein expression in NSCLC cells were detected by RT-qPCR and Western-blot, respectively. Transwell assay was performed to test the cell migration and invasion. In order to investigate the function of exosomal miRNA in NSCLC, in vivo model of NSCLC was constructed. Results MiR-770 was identified to be downregulated in NSCLC, and miR-770 agomir could significantly inhibit NSCLC cell proliferation through inducing the apoptosis. Additionally, the metastasis of NSCLC cells was decreased by miR-770 agomir. MAP3K1 was identified to be the target mRNA of miR-770. Meanwhile, tumor cell-derived exosomal miR-770 inhibited M2 macrophage polarization via downregulation of MAP3K1, which in turn suppressed NSCLC cell invasion. Besides, tumor cell-derived exosomal miR-770 markedly decreased NSCLC tumor growth in vivo through suppressing M2 macrophage polarization. Conclusion Tumor cell-derived exosomal miR-770 inhibits M2 macrophage polarization to inhibit the invasion of NSCLC cells via targeting MAP3K1. Thus, this study provided a new strategy for the treatment of NSCLC.
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Affiliation(s)
- Jixian Liu
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, Shenzhen, China
| | - Ruixing Luo
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, Shenzhen, China
| | - Junbin Wang
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, Shenzhen, China
| | - Xinyu Luan
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, Shenzhen, China
| | - Da Wu
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, Shenzhen, China
| | - Hua Chen
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, Shenzhen, China
| | - Qinghua Hou
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, Shenzhen, China
| | - Guangxian Mao
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, Shenzhen, China
| | - Xiaoqiang Li
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, Shenzhen, China
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Xu N, Huang FC, Li WL, Luan X, Jiang YM, He B. [Predictive value of combination of MRI tumor regression grade and apparent diffusion coefficient for pathological complete remission after neoadjuvant treatment of locally advanced rectal cancer]. Zhonghua Wei Chang Wai Ke Za Zhi 2021; 24:359-365. [PMID: 33878826 DOI: 10.3760/cma.j.cn.441530-20200225-00089] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: Pelvic high-resolution magnetic resonance imaging (MRI) has now become a standard method for evaluating the efficacy of neoadjuvant treatment for locally advanced rectal cancer (LARC). However, this traditional morphological qualitative assessment method based on T2-weighted imaging (T2WI) is not effective in predicting pathological complete remission (pCR). The purpose of this study is to investigate whether combining the magnetic resonance tumor regression grade (mrTRG) with apparent diffusion coefficient (ADC) can improve diagnostic value for pCR after preoperative neoadjuvant chemoradiotherapy (nCRT) of LARC. Methods: This was a diagnostic study. Clinicopathological data of 134 LARC patients who received nCRT and radical surgery in the First Affiliated Hospital of Kunming Medical University from January 2017 to December 2019 were retrospectively analyzed. All the patients underwent MRI which included T2WI and DWI sequences before and 8 weeks after nCRT. Two radiologists independently drew ROIs on T2WI and DWI to estimate mrTRG stage and calculate the mean ADC value. Receiver operating characteristics (ROC) method was applied to evaluate the predict value of mrTRG combined with mean ADC value for pCR. Results: Of 134 LARC patients, 85 were male and 49 were female with median age of 58 (28-82) years. After nCRT, MRI suggested 21 patients (15.7%) had clinical complete remission (cCR), e.g. mrTRG stage 1-2. Postoperative pathology revealed 31 (23.1%) patients had pCR. The evaluations of mrTRG and ADC value by the two readers were highly consistent, and the intra-group correlation coefficients were 0.83 (95% CI: 0.703-0.881) and 0.96 (95% CI: 0.989-0.996), respectively. There was a negative correlation between mrTRG and pCR (r(s)=-0.505, P<0.01), and a positive correlation between mean ADC value and pCR (r(s)=0.693, P<0.01). The ROC curve showed that mrTRG alone had a medium predictive value for pCR, with an area under the curve (AUC) of 0.832 (95% CI: 0.743-0.921); the mean ADC value had a higher predictive value for pCR, with AUC of 0.906 (95% CI: 0.869-0.962). The predictive value of the combined model of mrTRG and ADC value for pCR was significantly better than that of mrTRG alone (P=0.015), and the AUC was 0.908 (95% CI: 0.849-0.968). Conclusion: Both mrTRG and mean ADC value can be non-invasive methods to predict the efficacy of nCRT for LARC. Combining the mean ADC value with mrTRG can result in better pCR prediction.
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Affiliation(s)
- N Xu
- Department of Oncology, the First Affiliate Hospital, Kunming Medical University, Kunming 650032, China
| | - F C Huang
- Department of Oncology, the First Affiliate Hospital, Kunming Medical University, Kunming 650032, China
| | - W L Li
- Department of Oncology, the First Affiliate Hospital, Kunming Medical University, Kunming 650032, China
| | - X Luan
- Department of Oncology, the First Affiliate Hospital, Kunming Medical University, Kunming 650032, China
| | - Y M Jiang
- Medical Imaging Center, the First Affiliate Hospital, Kunming Medical University, Kunming 650032, China
| | - B He
- Medical Imaging Center, the First Affiliate Hospital, Kunming Medical University, Kunming 650032, China
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Francis M, Gopinathan G, Salapatas A, Nares S, Gonzalez M, Diekwisch T, Luan X. SETD1 and NF-κB Regulate Periodontal Inflammation through H3K4 Trimethylation. J Dent Res 2020; 99:1486-1493. [PMID: 32762504 PMCID: PMC7684838 DOI: 10.1177/0022034520939029] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
The inflammatory response to periodontal pathogens is dynamically controlled by the chromatin state on inflammatory gene promoters. In the present study, we have focused on the effect of the methyltransferase SETD1B on histone H3 lysine K4 (H3K4) histone trimethylation on inflammatory gene promoters. Experiments were based on 3 model systems: 1) an in vitro periodontal ligament (PDL) cell culture model for the study of SETD1 function as it relates to histone methylation and inflammatory gene expression using Porphyromonas gingivalis lipopolysaccharide (LPS) as a pathogen, 2) a subcutaneous implantation model to determine the relationship between SETD1 and nuclear factor κB (NF-κB) through its activation inhibitor BOT-64, and 3) a mouse periodontitis model to test whether the NF-κB activation inhibitor BOT-64 reverses the inflammatory tissue destruction associated with periodontal disease. In our PDL progenitor cell culture model, P. gingivalis LPS increased H3K4me3 histone methylation on IL-1β, IL-6, and MMP2 gene promoters, while SETD1B inhibition decreased H3K4me3 enrichment and inflammatory gene expression in LPS-treated PDL cells. LPS also increased SETD1 nuclear localization in a p65-dependent fashion and the nuclear translocation of p65 as mediated through SETD1, suggestive of a synergistic effect between SETD1 and p65 in the modulation of inflammation. Confirming the role of SETD1 in p65-mediated periodontal inflammation, BOT-64 reduced the number of SETD1-positive cells in inflamed periodontal tissues, restored periodontal tissue integrity, and enhanced osteogenesis in a periodontal inflammation model in vivo. Together, these results have established the histone lysine methyltransferase SETD1 as a key factor in the opening of the chromatin on inflammatory gene promoters through histone H3K4 trimethylation. Our studies also confirmed the role of BOT-64 as a potent molecular therapeutic for the restoration of periodontal health through the inhibition of NF-κB activity and the amelioration of SETD1-induced chromatin relaxation.
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Affiliation(s)
- M. Francis
- Department of Oral Biology, UIC College of Dentistry, Chicago, IL, USA
| | - G. Gopinathan
- Department of Periodontics and Center for Craniofacial Research and Diagnosis, Texas A&M University College of Dentistry, Dallas, TX, USA
| | - A. Salapatas
- Department of Oral Biology, UIC College of Dentistry, Chicago, IL, USA
| | - S. Nares
- Department of Periodontics, UIC College of Dentistry, Chicago, IL, USA
| | - M. Gonzalez
- Department of Periodontics and Center for Craniofacial Research and Diagnosis, Texas A&M University College of Dentistry, Dallas, TX, USA
| | - T.G.H. Diekwisch
- Department of Oral Biology, UIC College of Dentistry, Chicago, IL, USA
- Department of Periodontics and Center for Craniofacial Research and Diagnosis, Texas A&M University College of Dentistry, Dallas, TX, USA
| | - X. Luan
- Department of Oral Biology, UIC College of Dentistry, Chicago, IL, USA
- Department of Periodontics and Center for Craniofacial Research and Diagnosis, Texas A&M University College of Dentistry, Dallas, TX, USA
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Abstract
1. To investigate the physiological role of FABP4 in the goose ovary, this study determined the effects of overexpressing and siRNA interfering FABP4 on progesterone (P4) and oestradiol (E2) production in granulosa cells. Measurements were made by ELISA, real-time qRT-PCR and western blotting. 2. The concentrations of P4 and E2 in the FABP4 overexpression granulosa cells were increased compared to the control group (P > 0.05 for P4; P < 0.05 for E2). Likewise, the mRNA and protein expression levels of CYP11A1 and CYP19A1 were significantly higher than in the control group (P < 0.05 or P < 0.001). Conversely, the concentrations of P4 and E2 in the FABP4 silencing granulosa cells were significantly decreased compared with the control group (P < 0.001). Likewise, the mRNA and protein expression levels of CYP11A1 and CYP19A1 were significantly lower than in the control group (P < 0.001, or P < 0.01). 3. The study indicated that the FABP4 gene may regulate steroid hormone secretion and the expression of the steroidogenic genes in geese ovarian granulosa cells. These results support the possibility that the FABP4 gene mediates ovarian steroid hormone biosynthesis function and reproduction in geese.
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Affiliation(s)
- R Fan
- Key Laboratory of Zoonosis of Liaoning Province, College of Animal Science & Veterinary Medicine, Shenyang Agricultural University , Shenyang, P.R. China
| | - Z Cao
- Key Laboratory of Zoonosis of Liaoning Province, College of Animal Science & Veterinary Medicine, Shenyang Agricultural University , Shenyang, P.R. China
| | - M Chen
- Key Laboratory of Zoonosis of Liaoning Province, College of Animal Science & Veterinary Medicine, Shenyang Agricultural University , Shenyang, P.R. China
| | - H Wang
- Key Laboratory of Zoonosis of Liaoning Province, College of Animal Science & Veterinary Medicine, Shenyang Agricultural University , Shenyang, P.R. China
| | - M Liu
- Key Laboratory of Zoonosis of Liaoning Province, College of Animal Science & Veterinary Medicine, Shenyang Agricultural University , Shenyang, P.R. China
| | - M Gao
- Key Laboratory of Zoonosis of Liaoning Province, College of Animal Science & Veterinary Medicine, Shenyang Agricultural University , Shenyang, P.R. China
| | - X Luan
- Key Laboratory of Zoonosis of Liaoning Province, College of Animal Science & Veterinary Medicine, Shenyang Agricultural University , Shenyang, P.R. China
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Francis M, Gopinathan G, Foyle D, Fallah P, Gonzalez M, Luan X, Diekwisch T. Histone Methylation: Achilles Heel and Powerful Mediator of Periodontal Homeostasis. J Dent Res 2020; 99:1332-1340. [PMID: 32762486 PMCID: PMC7580172 DOI: 10.1177/0022034520932491] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The packaging of DNA around nucleosomes exerts dynamic control over eukaryotic gene expression either by granting access to the transcriptional machinery in an open chromatin state or by silencing transcription via chromatin compaction. Histone methylation modification affects chromatin through the addition of methyl groups to lysine or arginine residues of histones H3 and H4 by means of histone methyl transferases or histone demethylases. Changes in histone methylation state modulate periodontal gene expression and have profound effects on periodontal development, health, and therapy. At the onset of periodontal development, progenitor cell populations such as dental follicle cells are characterized by an open H3K4me3 chromatin mark on RUNX2, MSX2, and DLX5 gene promoters. During further development, periodontal progenitor differentiation undergoes a global switch from the H3K4me3 active methyl mark to the H3K27me3 repressive mark. When compared with dental pulp cells, periodontal neural crest lineage differentiation is characterized by repressive H3K9me3 and H3K27me3 marks on typical dentinogenesis-related genes. Inflammatory conditions as they occur during periodontal disease result in unique histone methylation signatures in affected cell populations, including repressive H3K9me3 and H3K27me3 histone marks on extracellular matrix gene promoters and active H3K4me3 marks on interleukin, defensin, and chemokine gene promoters, facilitating a rapid inflammatory response to microbial pathogens. The inflammation-induced repression of chromatin on extracellular matrix gene promoters presents a therapeutic opportunity for the application of histone methylation inhibitors capable of inhibiting suppressive trimethylation marks. Furthermore, inhibition of chromatin coregulators through interference with key inflammatory mediators such as NF-kB by means of methyltransferase inhibitors provides another avenue to halt the exacerbation of the inflammatory response in periodontal tissues. In conclusion, histone methylation dynamics play an intricate role in the fine-tuning of chromatin states during periodontal development and harbor yet-to-be-realized potential for the treatment of periodontal disease.
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Affiliation(s)
- M. Francis
- Department of Oral Biology, College of Dentistry, University of Illinois at Chicago, Chicago, IL, USA
| | - G. Gopinathan
- Department of Periodontics and Center for Craniofacial Research and Diagnosis, Texas A&M University College of Dentistry, Dallas, TX, USA
| | - D. Foyle
- Department of Periodontics and Center for Craniofacial Research and Diagnosis, Texas A&M University College of Dentistry, Dallas, TX, USA
| | - P. Fallah
- Department of Periodontics and Center for Craniofacial Research and Diagnosis, Texas A&M University College of Dentistry, Dallas, TX, USA
| | - M. Gonzalez
- Department of Periodontics and Center for Craniofacial Research and Diagnosis, Texas A&M University College of Dentistry, Dallas, TX, USA
| | - X. Luan
- Department of Oral Biology, College of Dentistry, University of Illinois at Chicago, Chicago, IL, USA
- Department of Periodontics and Center for Craniofacial Research and Diagnosis, Texas A&M University College of Dentistry, Dallas, TX, USA
| | - T.G.H. Diekwisch
- Department of Oral Biology, College of Dentistry, University of Illinois at Chicago, Chicago, IL, USA
- Department of Periodontics and Center for Craniofacial Research and Diagnosis, Texas A&M University College of Dentistry, Dallas, TX, USA
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Luan X, Song Z, Xu W, Li Y, Ding C, Chen H. Spectral characteristics on increasing hydrophilicity of Alfalfa seeds treated with alternating current corona discharge field. Spectrochim Acta A Mol Biomol Spectrosc 2020; 236:118350. [PMID: 32315952 DOI: 10.1016/j.saa.2020.118350] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 11/18/2019] [Revised: 02/23/2020] [Accepted: 04/06/2020] [Indexed: 06/11/2023]
Abstract
In this study, corona discharge at atmospheric pressure under an alternating current (AC) field with a multi-needle plate electrode structure was used as mutagen to study the effects of corona discharge field on the hydrophilicity of alfalfa seeds, especially the effects of non-uniform electric field that is frequently ignored. Alfalfa seed were divided into two groups, one group was covered with 1 mm-thick polypropylene petri dish cover that can be approximated as a single factor effect of non-uniform electric field, the other group was directly irradiated by corona discharge field under different parameters. Fourier transform infrared spectroscopy (FTIR) and dual-index sequence analysis were used to detect and compare the spectra of alfalfa seed coats with different treatments. Results showed that the peaks of the seed coat at 2856 and 1727 cm-1 in the treatment group changed, indicating that hydrophobic wax, lipid, and cellulose may be cracked or degraded. Corona discharge field treatment can change the chemical structure of alfalfa seed coats, resulting in the changes in their hydrophilicity. The results of the apparent contact angle and scanning electron microscopy (SEM) and other experiments showed that the change in 19 kV non-covered treatment group was greatest, the petri dish cover can effectively reduce the physicochemical etching of ionic wind, the hydrophilicity of alfalfa seeds improved after corona discharge field treatment regardless of whether there is an ionic effect during irradiation, and the ionic wind has a greater influence on the hydrophilicity of alfalfa seeds than the non-uniform electric field. This study revealed the biological effect mechanism of corona discharge field from the perspective of spectral characteristics and provided experimental data support for the analysis of alfalfa seed surface modification and chemical structure after corona discharge field treatment.
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Affiliation(s)
- Xinyu Luan
- College of Science, Inner Mongolia University of Technology, Hohhot 010051, China
| | - Zhiqing Song
- College of Science, Inner Mongolia University of Technology, Hohhot 010051, China.
| | - Wenqian Xu
- College of Science, Inner Mongolia University of Technology, Hohhot 010051, China
| | - Yibing Li
- College of Science, Inner Mongolia University of Technology, Hohhot 010051, China
| | - Changjiang Ding
- College of Science, Inner Mongolia University of Technology, Hohhot 010051, China
| | - Hao Chen
- College of Science, Inner Mongolia University of Technology, Hohhot 010051, China
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Liu J, Li Y, Xie Y, Luan X, Peng X, Mu T, Chen S, Wu D. Mutational distinction between adenocarcinoma in situ, minimally invasive adenocarcinoma and invasive adenocarcinoma in lung cancer patients with multiple tumors. J Clin Oncol 2020. [DOI: 10.1200/jco.2020.38.15_suppl.e21089] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e21089 Background: Lung adenocarcinoma is the most popular lung cancer type, and it can be classified as adenocarcinoma in situ (AIS), minimally invasive adenocarcinoma (MIA) and invasive adenocarcinoma (IA) based on histology. The mutational similarities and differences have not been discussed in these subtypes. Methods: Targeted deep sequencing was performed on 31 lung adenocarcinomas with matched blood samples from 15 patients with multiple tumors. We compared mutations among each subtype. Results: The 31 tumors consisted of 10 AIS, 6 MIA and 15 IA subtypes; the median mutation number in each type was 1, 1 and 3 respectively. Eleven, six and fifty-three mutations were identified in AIS, MIA, and IA respectively. Among all the 67 mutations, only EGFR_p.L858R was found in all three types; BRAF_p.K601E was found in AIS and IA. Conclusions: AIS, MIA and IA harbor distinct mutational signatures, except for several popular driver mutations, suggesting their distinct origin and evolution path.
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Affiliation(s)
- Jixian Liu
- Peking University, Shenzhen Hospital, Shenzhen, China
| | | | - Yuancai Xie
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, Shenzhen, China
| | - Xinyu Luan
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, Shenzhen, China
| | - Xuxing Peng
- Peking University Shenzhen Hospital, Shenzhen, China
| | | | | | - Da Wu
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, Shenzhen, China
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16
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Liu J, Mao G, Li Y, Tao L, Wang W, Peng X, Wang J, Li X, Luan X, Luo R, Huang T, Zhang J, Xu M, Chen S, Wu D. Targeted deep sequencing helps distinguish independent primary tumors from intrapulmonary metastasis for lung cancer diagnosis. J Cancer Res Clin Oncol 2020; 146:2359-2367. [PMID: 32333141 DOI: 10.1007/s00432-020-03227-5] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 04/18/2020] [Indexed: 12/19/2022]
Abstract
PURPOSE Multiple lung lesions found in a single patient at the time of diagnosis often pose a diagnostic dilemma: are these lesions independent primary tumors (IPT) or the result of intrapulmonary metastases (IPM)? While traditional pathological methods sometimes have difficulty distinguishing IPM from IPT, modern molecular profiling based on next-generation sequencing techniques may provide a new strategy. METHODS Sixteen patients with multiple tumors were enrolled in this study. We performed targeted deep sequencing (~ 2000 × coverage) on a total of 40 tumors and matched blood samples. We compared mutational profiles between tumors within each patient and across patients to evaluate if they were genetically related. Computed tomographic images and histological staining were also used to validate tumor relationships. RESULTS A total of 125 mutations were identified in 16 patients. Twelve out of fourteen patients whose histological diagnoses favored IPT did not have any shared mutations in their multiple tumors. The other two showed discrepancies: Pt01 had a shared EGFR exon19 deletion in the two lung tumors found, and Pt16 had one common mutation (BRAFD594G) in two out of five lung tumors. Pt14 with lung metastasis from salivary gland adenoid cystic carcinoma had shared mutations; and Pt15 with suspected intrapulmonary metastasis (IPM) had identical mutations between the two tumors. Visualized data can be readily accessed through the website: mlc.opengene.org. CONCLUSION Analysis of overlapping mutations among different tumors assists physicians in distinguishing IPM from IPT. Our findings demonstrate that DNA sequencing can provide additional evidence in clinical practice when pathology is inadequate to make a conclusive diagnosis.
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Affiliation(s)
- Jixian Liu
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, 1120 Lianhua Road, Shenzhen, 518035, People's Republic of China
| | - Guangxian Mao
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, 1120 Lianhua Road, Shenzhen, 518035, People's Republic of China
| | - Yingmei Li
- HaploX Biotechnology, 3 Songpingshan Road, Fl 8, Shenzhen, 518057, People's Republic of China
| | - Lili Tao
- Department of Pathology, Peking University Shenzhen Hospital, Shenzhen, People's Republic of China
| | - Weifeng Wang
- HaploX Biotechnology, 3 Songpingshan Road, Fl 8, Shenzhen, 518057, People's Republic of China
| | - Xuxing Peng
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, 1120 Lianhua Road, Shenzhen, 518035, People's Republic of China
| | - Junbin Wang
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, 1120 Lianhua Road, Shenzhen, 518035, People's Republic of China
| | - Xiaoqiang Li
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, 1120 Lianhua Road, Shenzhen, 518035, People's Republic of China
| | - Xinyu Luan
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, 1120 Lianhua Road, Shenzhen, 518035, People's Republic of China
| | - Ruixing Luo
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, 1120 Lianhua Road, Shenzhen, 518035, People's Republic of China
| | - Tanxiao Huang
- HaploX Biotechnology, 3 Songpingshan Road, Fl 8, Shenzhen, 518057, People's Republic of China
| | - Jing Zhang
- HaploX Biotechnology, 3 Songpingshan Road, Fl 8, Shenzhen, 518057, People's Republic of China
| | - Mengmeng Xu
- HaploX Biotechnology, 3 Songpingshan Road, Fl 8, Shenzhen, 518057, People's Republic of China
| | - Shifu Chen
- HaploX Biotechnology, 3 Songpingshan Road, Fl 8, Shenzhen, 518057, People's Republic of China. .,Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, People's Republic of China.
| | - Da Wu
- Department of Thoracic Surgery, Peking University Shenzhen Hospital, 1120 Lianhua Road, Shenzhen, 518035, People's Republic of China.
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Li L, Yuan S, Zheng J, Luan X, Zhou Y, Gao S, Liu Z, Cheng K, Huang Y, Yu J. The Clinical Pathologic Characteristics of Angiogenesis Obtained By 18F-RGD PET in Patients with Non-Small Cell Lung Cancer. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.1353] [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: 11/25/2022]
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18
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Yu J, Chen X, Luan X, Yan Y, Fang J. Ubi-p63E is required for the self-renewal and differentiation of germline stem cells. Fertil Steril 2018. [DOI: 10.1016/j.fertnstert.2018.07.490] [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: 11/17/2022]
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Cao Z, Meng B, Fan R, Liu M, Gao M, Xing Z, Luan X. Comparative proteomic analysis of ovaries from Huoyan geese between pre-laying and laying periods using an iTRAQ-based approach. Poult Sci 2018; 97:2170-2182. [DOI: 10.3382/ps/pey029] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 02/22/2018] [Indexed: 01/12/2023] Open
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Sun X, Xu L, Guo F, Luo W, Gao S, Luan X. Neurokinin-1 receptor blocker CP-99 994 improved emesis induced by cisplatin via regulating the activity of gastric distention responsive neurons in the dorsal motor nucleus of vagus and enhancing gastric motility in rats. Neurogastroenterol Motil 2017; 29:1-11. [PMID: 28464353 DOI: 10.1111/nmo.13096] [Citation(s) in RCA: 7] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 03/31/2017] [Indexed: 02/08/2023]
Abstract
BACKGROUND Nowadays, chemotherapy induced nausea and vomiting (CINV) is still common in patients with cancer. It was reported that substance P mediated CINV via neurokinin-1 (NK1 ) receptor and antagonists of NK1 receptor has been proved useful for treating CINV but the mechanism are not fully understood. This study aimed to examine the role of NK1 receptor blocker, CP-99 994, when administrated into dorsal motor nucleus of vagus (DMNV), on the cisplatin-induced emesis in rats and the possible mechanism. METHODS Rats' kaolin intake, food intake, and bodyweight were recorded every day; gastric contraction activity was recorded in conscious rats through a force transducer implanted into the stomach; gastric emptying was monitored using the phenol red method; single unit extracellular firing in the DMNV were recorded. KEY RESULTS DMNV microinjection of CP-99 994 reduced the changes of increased kaolin consumption and suppressed food intake in cisplatin-treated rats; enhanced the gastric contraction activity dose-dependently in control and cisplatin-treated rats but enhanced gastric emptying only in cisplatin-treated rats; reduced the firing rate of gastric distention inhibited (GD-I) neurons but increased the firing rate of GD excited (GD-E) neurons in the DMNV. The effects of CP-99 994 on gastric motility and neuronal activity were stronger in cisplatin-treated rats than those of control rats. CONCLUSIONS AND INFERENCES Our results suggested that CP-99 994 could improve emesis induced by cisplatin by regulating gastric motility and gastric related neuronal activity in the DMNV.
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Affiliation(s)
- X Sun
- Department of Physiology and Pathophysiology, School of Basic Medicine, Qingdao University, Qingdao, Shandong Province, China
| | - L Xu
- Department of Physiology and Pathophysiology, School of Basic Medicine, Qingdao University, Qingdao, Shandong Province, China
| | - F Guo
- Department of Physiology and Pathophysiology, School of Basic Medicine, Qingdao University, Qingdao, Shandong Province, China
| | - W Luo
- Department of ophthalmology, Qingdao University Affiliated Hospital, Qingdao, Shandong Province, China
| | - S Gao
- Department of Physiology and Pathophysiology, School of Basic Medicine, Qingdao University, Qingdao, Shandong Province, China
| | - X Luan
- Department of Physiology and Pathophysiology, School of Basic Medicine, Qingdao University, Qingdao, Shandong Province, China
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Yan J, Guo MM, Shen YH, Wang YY, Luan X, Li C. Effects of processing techniques on oxidative stability of Prunus pedunculatus seed oil. Grasas y Aceites 2017. [DOI: 10.3989/gya.0215171] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
This paper investigated the effects of Prunus pedunculatus (P. pedunculatus) seed pre-treatment, including microwaving (M), roasting (R), steaming (S) and roasting plus steaming (RS) on crude oil quality in terms of yield, color change, fatty acid composition, and oxidative stability. The results showed an increase in monounsaturated fatty acid content and oxidative stability of the oils obtained from different processing treatments compared to the oil obtained from raw seeds (RW) without processing. The oils, obtained from pretreated seeds, had higher conjugated diene (CD) and 2-thiobarbituric acid (2-TBA) values, compared to that obtained from RW when stored in a Schaal oven at 65 °C for 168 h. However, polyphenol and tocopherol contents decreased in all oil samples, processed or unprocessed. The effect of pre-treating the seeds was more prominent in the oil sample obtained through the RS technique, and showed higher oxidative stability than the other processed oils and the oil from RW.
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22
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Abstract
MicroRNAs (miRNAs) are a group of small RNAs that control gene expression in all aspects of eukaryotic life, primarily through RNA silencing mechanisms. The purpose of the present review is to introduce key miRNAs involved in periodontal homeostasis, summarize the mechanisms by which they affect downstream genes and tissues, and provide an introduction into the therapeutic potential of periodontal miRNAs. In general, miRNAs function synergistically to fine-tune the regulation of biological processes and to remove expression noise rather than by causing drastic changes in expression levels. In the periodontium, miRNAs play key roles in development and periodontal homeostasis and during the loss of periodontal tissue integrity as a result of periodontal disease. As part of the anabolic phase of periodontal homeostasis and periodontal development, miRNAs direct periodontal fibroblasts toward alveolar bone lineage differentiation and new bone formation through WNT, bone morphogenetic protein, and Notch signaling pathways. miRNAs contribute equally to the catabolic aspect of periodontal homeostasis as they affect osteoclastogenesis and osteoclast function, either by directly promoting osteoclast activity or by inhibiting osteoclast signaling intermediaries or through negative feedback loops. Their small size and ability to target multiple regulatory networks of related sets of genes have predisposed miRNAs to become ideal candidates for drug delivery and tissue regeneration. To address the immense therapeutic potential of miRNAs and their antagomirs, an ever growing number of delivery approaches toward clinical applications have been developed, including nanoparticle carriers and secondary structure interference inhibitor systems. However, only a fraction of the miRNAs involved in periodontal health and disease are known today. It is anticipated that continued research will lead to a more comprehensive understanding of the periodontal miRNA world, and a systematic effort toward harnessing the enormous therapeutic potential of these small molecules will greatly benefit the future of periodontal patient care.
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Affiliation(s)
- X Luan
- 1 Department of Oral Biology, UIC College of Dentistry, Chicago, IL, USA
| | - X Zhou
- 2 Department of Periodontics, UIC College of Dentistry, Chicago, IL, USA
| | - J Trombetta-eSilva
- 3 Texas A&M University College of Dentistry, Center for Craniofacial Research and Diagnosis and Department of Periodontics, Dallas, TX, USA
| | - M Francis
- 1 Department of Oral Biology, UIC College of Dentistry, Chicago, IL, USA
| | - A K Gaharwar
- 4 Department of Biomedical Engineering, Texas A&M University, College Station, TX, USA.,5 Department of Materials Science and Engineering, Texas A&M University, College Station, TX, USA.,6 Center for Remote Health Technologies and Systems, Texas A&M University, College Station, TX, USA
| | - P Atsawasuwan
- 7 Department of Orthodontics, UIC College of Dentistry, Chicago, IL, USA
| | - T G H Diekwisch
- 3 Texas A&M University College of Dentistry, Center for Craniofacial Research and Diagnosis and Department of Periodontics, Dallas, TX, USA
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Luan X, Wang S, Huang Y, Hou W, Ma L, Liu N, Zhao S, Niu F, Han Y, Liu Z, Yuan S. 18F-ALF-NOTA-PRGD2 Positron Emission Tomography/Computed Tomography May Predict Short-term Outcome of Concurrent Chemoradiation Therapy in Patients With Locally Advanced Non-Small Cell Lung Cancer. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.1751] [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: 10/20/2022]
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Wysokinski TW, Ianowski JP, Luan X, Belev G, Miller D, Webb MA, Zhu N, Chapman D. BMIT facility at the Canadian Light Source: Advances in X-ray phase-sensitive imaging. Phys Med 2016; 32:1753-1758. [PMID: 27453203 DOI: 10.1016/j.ejmp.2016.07.090] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 07/14/2016] [Accepted: 07/15/2016] [Indexed: 12/21/2022] Open
Abstract
The BioMedical Imaging and Therapy (BMIT) facility [1,2] located at the Canadian Light Source, provides synchrotron-specific imaging and radiation therapy capabilities. There are two separate beamlines used for experiments: the bending magnet (05B1-1) and the insertion device (05ID-2) beamline. The bending magnet beamline provides access to monochromatic beam spanning a spectral range of 15-40keV, and the beam is 240mm wide in the POE-2 experimental hutch. Users can also perform experiments with polychromatic (pink) beam. The insertion device beamline was officially opened for general user program in 2015. The source for the ID beamline is a multi-pole, superconducting 4.3T wiggler. The high field gives a critical energy over 20keV. The optics hutches prepare a beam that is 220mm wide in the last experimental hutch SOE-1. The monochromatic spectral range spans 25-150+keV. Several different X-ray detectors are available for both beamlines, with resolutions ranging from 2μm to 200μm. BMIT provides a number of imaging techniques including standard absorption X-ray imaging, K-edge subtraction imaging (KES), in-line phase contrast imaging (also known as propagation based imaging, PBI) and Diffraction Enhanced Imaging/Analyzer Based Imaging (DEI/ABI), all in either projection or CT mode. PBI and DEI/ABI are particularly important tools for BMIT users since these techniques enable visualization of soft tissue and allow for low dose imaging.
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Affiliation(s)
| | - J P Ianowski
- Anatomy and Cell Biology, University of Saskatchewan, Saskatoon, SK, Canada
| | - X Luan
- Anatomy and Cell Biology, University of Saskatchewan, Saskatoon, SK, Canada
| | - G Belev
- Canadian Light Source, Saskatoon, SK, Canada
| | - D Miller
- Canadian Light Source, Saskatoon, SK, Canada
| | - M A Webb
- Canadian Light Source, Saskatoon, SK, Canada
| | - N Zhu
- Canadian Light Source, Saskatoon, SK, Canada
| | - D Chapman
- Canadian Light Source, Saskatoon, SK, Canada; Anatomy and Cell Biology, University of Saskatchewan, Saskatoon, SK, Canada
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Zhao L, Zhang QY, Luan X, Huang X, Zhao S, Zhao H. Relationship between the expression of Notch1 and EZH2 and the prognosis of breast invasive ductal carcinoma. Genet Mol Res 2016; 15:gmr7464. [PMID: 27050973 DOI: 10.4238/gmr.15017464] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We determined whether the coexpression of Notch1 and EZH2 influences the progression and prognosis of breast invasive ductal carcinoma. Using the χ(2) test, a significant difference was found between high and low expression of Notch1 in terms of lymph node, hormone receptor, and p53 expression (P < 0.05). Moreover, a significant difference was found between high and low expression of EZH2 in terms of tumor size, histologic grade, hormone receptor, and expression of Ki67 (P < 0.05). Using Pearson correlation analysis, we found a significant positive correlation between Notch1 and EZH2 expression in the tissue samples of breast invasive ductal carcinoma (P = 0.038). High Notch1 and EZH2 expression was associated with poor progression-free survival compared with low expression (PNotch1 = 0.000, 40.3 vs 48.9 months; PEZH2 = 0.000, 40.2 vs 49.9 months). Moreover, we found that high Notch1 and EZH2 expression was associated with poor overall survival compared with low expression (PNotch1 = 0.000, 51.2 vs 56.2 months; PEZH2 = 0.002, 51.7 vs 56.4 months). In conclusion, Notch1 and EZH2 coexpression contributes to the progression and prognosis of breast invasive ductal carcinoma.
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Affiliation(s)
- L Zhao
- Department of Medical Oncology, The Tumor Hospital of Harbin Medical University, Harbin, China
| | - Q Y Zhang
- Department of Medical Oncology, The Tumor Hospital of Harbin Medical University, Harbin, China
| | - X Luan
- Department of Medical Oncology, The Tumor Hospital of Harbin Medical University, Harbin, China
| | - X Huang
- Department of Medical Oncology, The Tumor Hospital of Harbin Medical University, Harbin, China
| | - S Zhao
- Department of Medical Oncology, The Tumor Hospital of Harbin Medical University, Harbin, China
| | - H Zhao
- Department of Medical Oncology, The Tumor Hospital of Harbin Medical University, Harbin, China
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Zhou X, Luan X, Chen Z, Francis M, Gopinathan G, Li W, Lu X, Li S, Wu C, Diekwisch TGH. MicroRNA-138 Inhibits Periodontal Progenitor Differentiation under Inflammatory Conditions. J Dent Res 2015; 95:230-7. [PMID: 26518300 DOI: 10.1177/0022034515613043] [Citation(s) in RCA: 43] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Inflammatory conditions as they occur during periodontal disease often result in decreased alveolar bone levels and a loss of connective tissue homeostasis. Here we have focused on the effect of microRNA-138 (miR-138) as a potential regulator of periodontal stem cells as they affect homeostasis during inflammatory conditions. Our data indicate that miR-138 was significantly upregulated in our periodontal disease animal model. Interaction of miR-138 with a predicted targeting site on the osteocalcin (OC) promoter resulted in a 3.7-fold reduction of luciferase activity in promoter assays compared with controls; and miR-138 overexpression in periodontal progenitors significantly inhibited OC (3.4-fold), Runx2 (2.8-fold), and collagen I (2.6-fold). Moreover, treatment with inflammatory modulators such as interleukin (IL)-6 and lipopolysaccharide (LPS) resulted in a significant 2.2-fold (IL-6) or 1.9-fold (LPS) increase in miR-138 expression, while OC and Runx2 expression was significantly decreased as a result of treatment with each inflammatory mediator. Further defining the role of miR-138 in the OC-mediated control of mineralization, we demonstrated that the LPS-induced downregulation of OC expression was partially reversed after miR-138 knockdown. LPS, miR-138 mimic, and OC small interfering RNA inhibited osteoblast differentiation marker alkaline phosphatase activity, while miR-138 inhibitor and OC protein addition enhanced alkaline phosphatase activity. Supporting the role of OC as an essential modulator of osteoblast differentiation, knockdown of miR-138 or addition of OC protein partially rescued alkaline phosphatase activity in periodontal ligament (PDL) cells subjected to LPS treatment. Our data establish miR-138 inhibitor as a potential therapeutic agent for the prevention of the bone loss associated with advanced periodontal disease.
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Affiliation(s)
- X Zhou
- Department of Periodontics, College of Dentistry, University of Illinois at Chicago, Chicago, IL, USA Center for Molecular Biology of Oral Diseases, College of Dentistry, University of Illinois at Chicago, Chicago, IL, USA
| | - X Luan
- Department of Oral Biology, College of Dentistry, University of Illinois at Chicago, Chicago, IL, USA
| | - Z Chen
- Department of Periodontics, College of Dentistry, University of Illinois at Chicago, Chicago, IL, USA Center for Molecular Biology of Oral Diseases, College of Dentistry, University of Illinois at Chicago, Chicago, IL, USA
| | - M Francis
- Department of Oral Biology, College of Dentistry, University of Illinois at Chicago, Chicago, IL, USA
| | - G Gopinathan
- Department of Oral Biology, College of Dentistry, University of Illinois at Chicago, Chicago, IL, USA
| | - W Li
- Department of Oral Biology, College of Dentistry, University of Illinois at Chicago, Chicago, IL, USA
| | - X Lu
- Department of Oral Biology, College of Dentistry, University of Illinois at Chicago, Chicago, IL, USA
| | - S Li
- Department of Oral Biology, College of Dentistry, University of Illinois at Chicago, Chicago, IL, USA
| | - C Wu
- Department of Pediatric Dentistry, College of Dentistry, University of Illinois at Chicago, Chicago, IL, USA
| | - T G H Diekwisch
- Department of Periodontics, Baylor College of Dentistry, Dallas, TX, USA
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Wang G, Wang P, Huang J, Tan H, Liu W, Zhang J, Liao Z, Yu L, Mao Y, Ye S, Feng L, Zhang Y, Wang Y, Li W, Luan X, Wang S, Bai S. ASSA14-10-01 Haemodynamic effects of short-term infusion of recombinant human atrial natriuretic peptide (rhANP) for acute decompensated heart failure: a randomised, double-blind, placebo-controlled, multicenter study. Heart 2015. [DOI: 10.1136/heartjnl-2014-307109.82] [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: 11/03/2022]
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Wang P, Luan X, Wang G, Liu W, Zhang J, Li W, Gao X, Wang Y, Mao Y, Sun X, Wang Q, Zhang Y, Bai S. Efficacy and safety of short-term administration of recombinant human atrial natriuretic peptide (rhANP) for congestive heart failure: a phase II, multicentre randomized controlled dose-finding study. J Clin Pharm Ther 2013; 38:388-93. [PMID: 23672267 DOI: 10.1111/jcpt.12072] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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: 09/16/2012] [Accepted: 04/21/2013] [Indexed: 11/29/2022]
Abstract
WHAT IS KNOWN AND OBJECTIVE Although the long-term infusion of ANP has proved effective to treat heart failure, no published randomized controlled study has been reported to confirm the efficacy of the short-term ANP infusion in congestive heart failure (CHF) patients. This study was designed to assess the efficacy and safety of short-term infusion of recombinant human atrial natriuretic peptide (rhANP) in CHF patients. METHODS A total of 48 patients with CHF were enrolled and randomized into four groups, treated with standard therapy or rhANP (0·05, 0·1 or 0·2 μg/kg/min) for 1-hour infusion in addition to standard therapy. The hemodynamics were assessed for 12 h by Swan-Ganz catheter. RESULTS AND DISCUSSION The effect of the 0·05 μg/kg/min rhANP dose group on CO was modest and transient. The 0·2 μg/kg/min rhANP dose group tended to be associated with better effect on SV, CO and dyspnoea improvement, but modest effect on PCWP and more adverse events probably attributed to the study drug. However, the 0·1 μg/kg/min rhANP infusion was well tolerated and effective both on PCWP decrease (maximum:-9·46 ± 5·81 mmHg compared with baseline (P = 0·0002) and -6·75 mmHg compared with standard therapy, the 95% confidential interval [-13·43, -0·06 mmHg] at 1 h) and CO increase (maximum: 1·02 ± 1·43 L/min [P = 0·0308] at 1 h). WHAT IS NEW AND CONCLUSION In this small-sample study, 1-hour infusion of rhANP produced beneficial hemodynamic effects in CHF patients compared with standard therapy, and it was well tolerated. 0·1 μg/kg/min may be the optimum dose for short-term rhANP infusion to treat CHF for the further large sample trial before clinical application.
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Affiliation(s)
- P Wang
- State Key Laboratory of Cardiovascular Diseases, Fu Wai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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Atsawasuwan P, Lu X, Ito Y, Chen Y, Gopinathan G, Evans CA, Kulkarni AB, Gibson CW, Luan X, Diekwisch TGH. Expression and function of enamel-related gene products in calvarial development. J Dent Res 2013; 92:622-8. [PMID: 23625374 DOI: 10.1177/0022034513487906] [Citation(s) in RCA: 24] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Enamel-related gene products (ERPs) are detected in non-enamel tissues such as bone. We hypothesized that, if functional, ERP expression corresponds with distinct events during osteoblast differentiation and affects bone development and mineralization. In mouse calvariae and MC3T3 cells, expression profiles of enamel-related gene products (ERPs) correlated with key events in post-natal calvarial development and MC3T3 cell mineralization. Developing skulls from both Amel- and Ambn-deficient animals were approximately 15% shorter when compared with those of wild-type controls, and their sutures remained patent for a longer period of time. Analysis of Amel- and Ambn-deficient calvariae and calvarial osteoblast cultures revealed a dramatic reduction in mineralized nodules, a significant reduction in Runx2, Sp7, Ibsp, and Msx2 expression, and a reduction in Alx4 in Amel-deficient calvariae vs. an increase in Alx4 in Ambn-deficient calvariae. Analysis of these data indicates that ERP expression follows defined developmental profiles and affects osteoblast differentiation, mineralization, and calvarial bone development. We propose that, in parallel to their role in the developing enamel matrix, ERPs have retained an evolutionary conserved function related to the biomineralization of bones.
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Affiliation(s)
- P Atsawasuwan
- Brodie Laboratory for Craniofacial Genetics, University of Illinois at Chicago, Chicago, IL 60612, USA
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Abstract
OBJECTIVE The aim of this study was to investigate the role of invariant natural killer T (iNKT) cells in liver transplant tolerance in rats. METHODS Animals were randomly divided into 3 groups. The α-galactosylceramide (α-GalCer) group underwent injection through the caudal vein; the saline group received the same dose of saline and the control group received no treatment. Ten rats in each group were examined for survival the others were humanely killed on the seventh day posttransplantation. Liver tissues were used to assess histopathologic changes. Real-time polymerase chain reaction (PCR) was performed to determine the relative expressions of messanger RNAs of Th1/Th2-related cytokine (mRNAs) in the liver allograft. The serum levels of related cytokines were determined using enzyme-linked immunosorbent assay (ELISA). RESULTS Allograft survival was significantly higher among the α-galactosylceramide α-GalCer group than the saline or control groups. The histopathology showed mild changes in the α-galactosylceramide α-GalCer compared with the other 2 groups. Real-time PCR showed the relative expression of Th1-related cytokine interferen (IFN)-γ mRNA to be significantly lower in the α-galactosylceramide α-GalCer compared with the other 2 groups, while the Th2-related cytokine interleukin (IL)-10 mRNA was much higher. The ELISA results confirmed these differential expressions. CONCLUSION The iNKT cells may play a pivotal role in liver transplant tolerance due to their regulatory functions on the Th1/Th2 imbalance. iNKT cells should be considered to be significant targets because of their attractive specificity and induction of liver allograft tolerance.
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Affiliation(s)
- Y Liu
- Chongqing Key Laboratory of Hepatobiliary Surgery and Department of Hepatobiliary Surgery, Second Affiliated Hospital, Chongqing Medical University, Chongqing, People's Republic of China
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Luan X, Liao W, Lai X, He Y, Liu Y, Gong J, Li J. Dynamic Changes of Indoleamine 2,3-Dioxygenase of Kupffer Cells in Rat Liver Transplant Rejection and Tolerance. Transplant Proc 2012; 44:1045-7. [DOI: 10.1016/j.transproceed.2012.01.033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Hong D, Wang Z, Zhang W, Xi J, Lu J, Luan X, Yuan Y. A series of Chinese patients with desminopathy associated with six novel and one reported mutations in the desmin gene. Neuropathol Appl Neurobiol 2011; 37:257-70. [DOI: 10.1111/j.1365-2990.2010.01112.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Zhang H, Zhang D, Luan X, Xie G, Pan X. Inhibition of the Signal Transducers and Activators of Transcription (STAT) 3 Signalling Pathway by AG490 in Laryngeal Carcinoma Cells. J Int Med Res 2010; 38:1673-81. [PMID: 21309481 DOI: 10.1177/147323001003800512] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Signal transducers and activators of transcription (STAT) are important in the development of laryngeal carcinomas and are potential novel molecular targets for therapy to improve survival of patients with this cancer. This study was designed to investigate the influence of the janus activated kinase (JAK)/STAT inhibitor AG490 on proliferation and apoptosis of Hep-2 human laryngeal cancer cells and whether there was any inhibition by AG490 of the JAK/STAT3 signalling pathway. AG490 inhibited cell proliferation in dose-and time-dependent manners and induced apoptosis in Hep-2 cells, with the number of apoptotic cells increasing with time. AG490 inhibited G1 to S cell cycle transition and induced G1 cell cycle arrest as well as significantly down-regulating STAT3, phosphorylated STAT3 and survivin in Hep-2 cells. This study showed that AG490 significantly inhibited proliferation and induced apoptosis of laryngeal carcinoma cells through down-regulation of STAT3 and survivin, suggesting a potential target for laryngeal carcinoma treatment.
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Affiliation(s)
- H Zhang
- Department of Otorhinolaryngology, Head and Neck Surgery, Qilu Hospital, Shandong University, Jinan, China
| | - D Zhang
- Department of Otorhinolaryngology, Head and Neck Surgery, Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - X Luan
- Department of Otorhinolaryngology, Head and Neck Surgery, Qilu Hospital, Shandong University, Jinan, China
| | - G Xie
- Department of Otorhinolaryngology, Head and Neck Surgery, Qilu Hospital, Shandong University, Jinan, China
| | - X Pan
- Department of Otorhinolaryngology, Head and Neck Surgery, Qilu Hospital, Shandong University, Jinan, China
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Luan X, Dangaria S, Ito Y, Walker CG, Jin T, Schmidt MK, Galang MT, Druzinsky R. Neural crest lineage segregation: a blueprint for periodontal regeneration. J Dent Res 2009; 88:781-91. [PMID: 19767574 DOI: 10.1177/0022034509340641] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
During the recent decade, the periodontal attachment apparatus has become one of the premier areas of the body for the development of novel tissue-engineering strategies. In the present review, we describe a developmental biology approach to characterize current concepts in periodontal regeneration and to discuss strategies for future applications in periodontal therapies. To decipher the developmental make-up of the periodontal region, we have followed the path of the migratory neural crest, since it gives rise to periodontal progenitor tissues, which in turn are subjected to the influence of diverse craniofacial extracellular matrices and peptide growth factors. Based on this developmental perspective, we have conducted a systematic analysis of the factors, progenitor cells, and matrices used in current periodontal tissue-engineering approaches. We propose that the developmental history of a tissue is a highly instructive design template for the discovery of novel bioengineering tools and approaches.
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Affiliation(s)
- X Luan
- Brodie Laboratory for Craniofacial Genetics, Department of Oral Biology, UIC College of Dentistry, The University of Illinois at Chicago, 801 South Paulina, M/C 841, Chicago, IL 60612, USA.
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Abstract
OBJECTIVE To determine the accuracy of predischarge visual assessment of jaundice for estimating bilirubin concentration and predicting risk of significant neonatal hyperbilirubinaemia. DESIGN Prospective cohort study. SETTING Well Baby Nursery at the Hospital of the University of Pennsylvania. PATIENTS 522 term and late preterm newborns. INTERVENTIONS Nurses used a 5-point scale to grade the maximum cephalocaudal extent of jaundice prior to discharge. MAIN OUTCOME MEASURES (1) Correlation between jaundice grade and bilirubin concentration. (2) Predictive accuracy of jaundice grade for identifying infants who developed significant hyperbilirubinaemia, defined as a bilirubin level that at any time after birth exceeded or was within 1 mg/dl (17 micromol/l) of the American Academy of Pediatrics-recommended hour-specific phototherapy treatment threshold. RESULTS Nurses' assessment of jaundice extent was only moderately correlated with bilirubin concentration and was similar in black and non-black infants (Spearman's rho = 0.45 and 0.55, respectively (p = 0.13)). The correlation was particularly weak among infants <38 weeks' gestational age (rho = 0.29) compared with infants > or = 38 weeks' gestation (rho = 0.53, p = 0.05). Jaundice extent had poor overall accuracy for predicting risk of significant hyperbilirubinaemia (c-statistic = 0.65) but complete absence of jaundice had high sensitivity (95%) and excellent negative predictive value (99%) for ruling out the development of significant hyperbilirubinaemia. CONCLUSIONS Clinicians should not use extent of cephalocaudal jaundice progression to estimate bilirubin levels during the birth hospitalisation, especially in late preterm infants. However, the complete absence of jaundice can be used to predict with very high accuracy which infants will not develop significant hyperbilirubinaemia.
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Affiliation(s)
- R Keren
- Division of General Pediatrics and the Center for Pediatric Clinical Effectiveness, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA.
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Chen Y, Chen J, Liu Z, Liang S, Luan X, Long F, Peng Y, Yan L, Gong J. Relationship between TH1/TH2 cytokines and immune tolerance in liver transplantation in rats. Transplant Proc 2008; 40:2691-5. [PMID: 18929837 DOI: 10.1016/j.transproceed.2008.08.014] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
OBJECTIVE To explore the relationship between Th1/Th2 cytokine expressions and immune tolerance in rat liver transplantation. METHODS Recipients were divided into three groups (each group = 12 rats). The allograft group underwent orthotopic liver transplantation from male Wistar-to-Sprague-Dawley (SD) rats. The isograft group of SD-to-SD liver transplantation was complemented with a control group of normal male SD rats that had sham operations. We evaluated the 2-week survival rates histological changes, as well as serum and mRNA expression levels of Th1/Th2 cytokines: interferon-gamma (IFN-gamma) and interleukin-10 (IL-10). RESULTS The 1-week survival in the isograft and allograft groups were 100% and 41.67%, respectively. The 2-week survival rates were 75% and 8.33% (P < .05). Light microscopic inspection revealed severe acute rejection in the allograft but not the isograft group in the first week postoperation. This observation was verified by the cellular morphology under transmission electron microscopy. Serum IFN-gamma (Th1 cytokine) levels (pg/mL) determined by enzyme-linked immunosorbent assay in the allograft, isograft, and control groups were 386.67 +/- 14.36, 159.83 +/- 16.53, and 87.83 +/- 8.67, respectively; for IL-10 (Th2 cytokine), they were 126.33 +/- 13.10, 288.33 +/- 17.10, and 70.50 +/- 7.23, respectively (P < .05, allograft vs isograft). The semiquantitative reverse-transcriptase polymerase chain reaction assay showed that expression of IFN-gamma and IL-10 mRNA was similar to that of serum levels. IFN-gamma mRNA was more highly expressed in the allograft group and IL-10 mRNA, in the isograft group (P < .05). CONCLUSIONS The dynamic equilibrium of Th1/Th2 cytokines is critically involved in immune tolerance. The deviation of Th1 to Th2 may be one mechanism of immune tolerance.
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Affiliation(s)
- Y Chen
- Department of Hepatobliliary Surgery, Second Affiliated Hospital, Chongqing University of Medical Sciences, Chongqing, China
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Luan X, Yu H, Wei X, Zhou Y, Wang W, Li P, Gan X, Wei D, Xiao J. GPR54 polymorphisms in Chinese girls with central precocious puberty. Neuroendocrinology 2007; 86:77-83. [PMID: 17700012 DOI: 10.1159/000107511] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2007] [Accepted: 05/17/2007] [Indexed: 11/19/2022]
Abstract
AIMS The GPR54 gene has been proved to be important in the process of puberty onset, yet no association study has been performed to evaluate the effect of polymorphisms in the gene on central precocious puberty (CPP). This study was designed to scan for polymorphisms in the GPR54 gene and to investigate the relationships between the genotypes of GPR54 and the disease. METHODS 272 Chinese Han girls diagnosed to be CPP patients were recruited as the case group and 288 unrelated normal Chinese Han girls as the control group. The whole GPR54 gene was directly sequenced in randomly selected case samples, and the polymorphisms identified were genotyped by ligase detection reaction in both groups. Distributions of the polymorphisms and haplotypes were calculated for statistical evaluation. RESULTS Totally 6 polymorphisms were found in sequencing, one of which is a nonsynonymous mutation, while genotyping declared that another SNP located in the promoter region was statistically related to the disease (p = 0.037). CONCLUSION One polymorphism in GPR54 gene might be correlated with some cases of CPP, likely by changes in expression of the receptor, but the moderate p value and the lack of functional data make it hard to confirm the correlation. Further studies on the polymorphisms are needed for the exact mechanism.
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Affiliation(s)
- X Luan
- State Key Laboratory of Bioreactor Engineering, Institute of Biochemistry, East China University of Science and Technology, Shanghai, PR China
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Abstract
Amelogenin, the major protein of developing enamel matrix, controls enamel crystal growth via unique supermolecular features. While much has been contributed to our understanding of mammalian amelogenin function, little is known about how amelogenin and its unique physico-chemical features have evolved among vertebrates. Here we report, for the first time, amphibian amelogenin recombinant protein expression and characterization in Rana pipiens. In order to characterize R. pipiens amelogenin, the newly discovered amelogenin coding sequence was amplified, subcloned, and expressed in Eshcerichia coli. Our newly generated R. pipiens amelogenin-specific antisera resolved a major 19-kDa band on western blots of frog tooth extracts and revealed an enamel organ tissue-specific localization pattern using immunohistochemistry. Using mass spectroscopy, a single major compound with a molecular weight of 21.6 kDa was detected, which corresponded to the amino acid sequence-based molecular weight prediction of the His fusion recombinant protein. Dynamic light scattering studies resolved 41-nm radius subunits compared with 14-nm radius subunits from mouse recombinant amelogenin controls. Transmission electron microscopy revealed defined spherical subunits in R. pipiens matrix self-assembly in contrast with a homogeneous 'stippled' matrix in mouse amelogenin matrix self-assembly. Our data suggest that R. pipiens amelogenin is distinguished from mammalian amelogenins by a number of unique physico-chemical properties which may be related to specific modes of crystal formation in frog enamel.
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Affiliation(s)
- T G H Diekwisch
- Department of Oral Biology and Allan G. Brodie Laboratory for Craniofacial Genetics, College of Dentistry, University of Illinois at Chicago, Chicago, IL 60612, USA.
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Merrill J, Ballard P, Hibbs A, Godinez R, Godinez M, Luan X, Ryan R, Reynolds A, Hamvas A, Spence K, Courtney S, Posencheg M, Ades A, Lisby D, Ballard R. Booster Surfactant Therapy beyond the First Week of Life in Ventilated Extremely Low Gestational Age Neonates. J Investig Med 2006. [DOI: 10.1177/108155890605401s47] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- J.D. Merrill
- University of Pennsylvania School of Medicine and Children's Hospital of Philadelphia, Philadelphia, PA
- Schneider Children's Hospital, NY
- Washington University, St. Louis, MO
- Women & Children's Hospital, Buffalo, NY
| | - P.L. Ballard
- University of Pennsylvania School of Medicine and Children's Hospital of Philadelphia, Philadelphia, PA
- Schneider Children's Hospital, NY
- Washington University, St. Louis, MO
- Women & Children's Hospital, Buffalo, NY
| | - A.M. Hibbs
- University of Pennsylvania School of Medicine and Children's Hospital of Philadelphia, Philadelphia, PA
- Schneider Children's Hospital, NY
- Washington University, St. Louis, MO
- Women & Children's Hospital, Buffalo, NY
| | - R.I. Godinez
- University of Pennsylvania School of Medicine and Children's Hospital of Philadelphia, Philadelphia, PA
- Schneider Children's Hospital, NY
- Washington University, St. Louis, MO
- Women & Children's Hospital, Buffalo, NY
| | - M.H. Godinez
- University of Pennsylvania School of Medicine and Children's Hospital of Philadelphia, Philadelphia, PA
- Schneider Children's Hospital, NY
- Washington University, St. Louis, MO
- Women & Children's Hospital, Buffalo, NY
| | - X. Luan
- University of Pennsylvania School of Medicine and Children's Hospital of Philadelphia, Philadelphia, PA
- Schneider Children's Hospital, NY
- Washington University, St. Louis, MO
- Women & Children's Hospital, Buffalo, NY
| | - R. Ryan
- University of Pennsylvania School of Medicine and Children's Hospital of Philadelphia, Philadelphia, PA
- Schneider Children's Hospital, NY
- Washington University, St. Louis, MO
- Women & Children's Hospital, Buffalo, NY
| | - A.M. Reynolds
- University of Pennsylvania School of Medicine and Children's Hospital of Philadelphia, Philadelphia, PA
- Schneider Children's Hospital, NY
- Washington University, St. Louis, MO
- Women & Children's Hospital, Buffalo, NY
| | - A. Hamvas
- University of Pennsylvania School of Medicine and Children's Hospital of Philadelphia, Philadelphia, PA
- Schneider Children's Hospital, NY
- Washington University, St. Louis, MO
- Women & Children's Hospital, Buffalo, NY
| | - K. Spence
- University of Pennsylvania School of Medicine and Children's Hospital of Philadelphia, Philadelphia, PA
- Schneider Children's Hospital, NY
- Washington University, St. Louis, MO
- Women & Children's Hospital, Buffalo, NY
| | - S. Courtney
- University of Pennsylvania School of Medicine and Children's Hospital of Philadelphia, Philadelphia, PA
- Schneider Children's Hospital, NY
- Washington University, St. Louis, MO
- Women & Children's Hospital, Buffalo, NY
| | - M. Posencheg
- University of Pennsylvania School of Medicine and Children's Hospital of Philadelphia, Philadelphia, PA
- Schneider Children's Hospital, NY
- Washington University, St. Louis, MO
- Women & Children's Hospital, Buffalo, NY
| | - A. Ades
- University of Pennsylvania School of Medicine and Children's Hospital of Philadelphia, Philadelphia, PA
- Schneider Children's Hospital, NY
- Washington University, St. Louis, MO
- Women & Children's Hospital, Buffalo, NY
| | - D. Lisby
- University of Pennsylvania School of Medicine and Children's Hospital of Philadelphia, Philadelphia, PA
- Schneider Children's Hospital, NY
- Washington University, St. Louis, MO
- Women & Children's Hospital, Buffalo, NY
| | - R.A. Ballard
- University of Pennsylvania School of Medicine and Children's Hospital of Philadelphia, Philadelphia, PA
- Schneider Children's Hospital, NY
- Washington University, St. Louis, MO
- Women & Children's Hospital, Buffalo, NY
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Merrill JD, Ballard PL, Hibbs AM, Godinez RI, Godinez MH, Luan X, Ryan R, Reynolds AM, Hamvas A, Spence K, Courtney S, Posencheg M, Ades A, Lisby D, Ballard RA. 163 BOOSTER SURFACTANT THERAPY BEYOND THE FIRST WEEK OF LIFE IN VENTILATED EXTREMELY LOW GESTATIONAL AGE NEONATES. J Investig Med 2006. [DOI: 10.2310/6650.2005.x0004.162] [Citation(s) in RCA: 4] [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: 11/18/2022]
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Keren R, Bhutani VK, Luan X, Nihtianova S, Cnaan A, Schwartz JS. Identifying newborns at risk of significant hyperbilirubinaemia: a comparison of two recommended approaches. Arch Dis Child 2005; 90:415-21. [PMID: 15781937 PMCID: PMC1720335 DOI: 10.1136/adc.2004.060079] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
AIMS To compare the predictive performance of clinical risk factor assessment and pre-discharge bilirubin measurement as screening tools for identifying infants at risk of developing significant neonatal hyperbilirubinaemia (post-discharge total serum bilirubin (TSB) >95th centile). METHODS Retrospective cohort study of term and near term infants born in an urban community teaching hospital in Pennsylvania (1993-97). A clinical risk factor scoring system was developed and its predictive performance compared to a pre-discharge TSB expressed as a risk zone on a bilirubin nomogram. Main outcome measures were prediction model discrimination, range of predicted probabilities, and sensitivity, specificity, positive and negative predictive values, and likelihood ratios for various positivity criteria. RESULTS The clinical risk factor scoring system developed included birth weight, gestational age <38 weeks, oxytocin use during delivery, vacuum extraction, breast feeding, and combination breast and bottle feeding. The pre-discharge bilirubin risk zone had better discrimination (c = 0.83; 95% CI 0.80 to 0.86) than the clinical risk factor score (c = 0.71; 95% CI 0.66 to 0.76) and predicted risk of significant hyperbilirubinaemia as high as 59% compared with a maximum of 44% for the clinical risk factor score. Neither the risk score nor the pre-discharge TSB risk zone predicted the outcome with > or =0.98 sensitivity without significantly compromising specificity (0.13 and 0.21, respectively). Multi-level clinical risk factor scores and TSB risk zones produced likelihood ratios of 0.15-3.25 and 0.05-9.43, respectively. CONCLUSIONS The pre-discharge bilirubin expressed as a risk zone on an hour specific bilirubin nomogram is more accurate and generates wider risk stratification than a clinical risk factor score.
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Affiliation(s)
- R Keren
- Division of General Pediatrics, Pediatric Generalist Research Group, The Children's Hospital of Philadelphia, PA, USA.
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Lorch SA, Hibbs AM, Luan X, Ballard PL, Ballard RA, Merrill JD. 175 EARLY PEAK RESPIRATORY SEVERITY SCORE AS A RISK FACTOR FOR BRONCHOPULMONARY DYSPLASIA. J Investig Med 2005. [DOI: 10.2310/6650.2005.00005.174] [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: 11/18/2022]
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Ding Y, Li J, Luan X, Ding YH, Lai Q, Rafols JA, Phillis JW, Clark JC, Diaz FG. Exercise pre-conditioning reduces brain damage in ischemic rats that may be associated with regional angiogenesis and cellular overexpression of neurotrophin. Neuroscience 2004; 124:583-91. [PMID: 14980729 DOI: 10.1016/j.neuroscience.2003.12.029] [Citation(s) in RCA: 134] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/18/2003] [Indexed: 10/26/2022]
Abstract
There is increasing evidence that physical activity is associated with a decreased stroke risk. The purpose of this study was to determine if exercise could also reduce brain damage in rats subjected to transient middle cerebral artery (MCA) occlusion, and if the reduced brain injury is associated with angiogenesis as well as cellular expression of the nerve growth factor (NGF) and brain-derived neurotrophic factor (BDNF) in regions supplied by the MCA. Adult male Sprague Dawley rats (n=36) exercised 30 min each day for 3 weeks on a treadmill on which repetitive locomotor movement was required. Then, stroke was induced by a 2-h MCA occlusion using an intraluminal filament, followed by 48 h of reperfusion. In addition to the two exercised groups of animals with or without MCA occlusion, there were two other groups of animals, with or without MCA occlusion, housed for the same duration and used as non-exercised controls. Brain damage in ischemic rats was evaluated by neurologic deficits and infarct volume. Exercise preconditioned and non-exercised brains were processed for immunocytochemistry to quantify the number of microvessels or NGF- and BDNF-labeled cells. Pre-ischemic motor activity significantly (P<0.01) reduced neurologic deficits and infarct volume in the frontoparietal cortex and dorsolateral striatum. Cellular expressions of NGF and BDNF were significantly (P<0.01) increased in cortex (neuron) and striatum (glia) of rats under the exercise condition. Significant (P<0.01) increases in microvessel density were found in striatum. Physical activity reduced stroke damage. The reduced brain damage may be attributable to angiogenesis and neurotrophin overexpression in brain regions supplied by the MCA following exercise.
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Affiliation(s)
- Y Ding
- Department of Neurological Surgery, Wayne State University School of Medicine, Lande Medical Research Building, Room 48, 550 East Canfield Street, Detroit, MI 48201, USA.
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Ding Y, Li J, Lai Q, Rafols JA, Luan X, Clark J, Diaz FG. Motor balance and coordination training enhances functional outcome in rat with transient middle cerebral artery occlusion. Neuroscience 2004; 123:667-74. [PMID: 14706778 DOI: 10.1016/j.neuroscience.2003.08.031] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The goal of this study was to determine if relatively complex motor training on Rota-rod involving balance and coordination plays an essential role in improving motor function in ischemic rats, as compared with simple locomotor exercise on treadmill. Adult male Sprague-Dawley rats with (n=40) or without (n=40) ischemia were trained under each of three conditions: (1) motor balance and coordination training on Rota-rod; (2) simple exercise on treadmill; and (3) non-trained controls. Motor function was evaluated by a series of tests (foot fault placing, parallel bar crossing, rope and ladder climbing) before and at 14 or 28 days after training procedures in both ischemic and normal animals. Infarct volume in ischemic animals was determined with Nissl staining. Compared with both treadmill exercised and non-trained animals, Rota-rod-trained animals with or without ischemia significantly (P<0.01) improved motor performance of all tasks except for foot fault placing after 14 days of training, with normal rats having better performance. Animals trained for up to 28 days on the treadmill did not show significantly improved function. With regard to foot fault placing task, performance on foot placing was improved in ischemic rats across the three measurements at 0, 14 and 28 days regardless of training condition, while the normal group reached their best performance at the beginning of measurement. No significant differences in infarct volume were found in rats trained either with Rota-rod (47+/-4%; mean+/-S.E.), treadmill (45+/-5%) or non-exercised control (45+/-3%). In addition, no obvious difference could be detected in the location of the damage which included the dorso-lateral portion of the neostriatum and the frontoparietal cortex, the main regions supplied by the middle cerebral artery. The data suggest that complex motor training rather than simple exercise effectively improves functional outcome.
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Affiliation(s)
- Y Ding
- Department of Neurological Surgery, Wayne State University School of Medicine, Lande Medical Research Building, 550 East Canfield, 48201, Detroit, MI, USA.
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Sullivan KE, Jawad AF, Piliero LM, Kim N, Luan X, Goldman D, Petri M. Analysis of polymorphisms affecting immune complex handling in systemic lupus erythematosus. Rheumatology (Oxford) 2003; 42:446-52. [PMID: 12626795 DOI: 10.1093/rheumatology/keg157] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES Systemic lupus erythematosus (SLE) is a polygenic disorder of dysregulated inflammation. Numerous specific candidate genes have been identified and most relate to the handling of immune complexes or antigen presentation. This is consistent with the classic finding of immune complex deposition in affected end organs. We wished to examine combinatorial effects of polymorphic variants of genes involved in immune complex clearance in susceptibility to lupus. METHODS This study examined the occurrence of polymorphisms in genes which encode proteins known to be involved in immune complex handling and clearance. Each polymorphic variant of a complement protein (C2, mannose binding protein and C4), complement receptor (CR1) or Fc receptor (FcgammaRIIA and FcgammaRIIIA) gene is known to affect function adversely. One hundred and sixty SLE patients and 212 control subjects were genotyped using polymerase chain reaction methods. RESULTS We found an increasing association of SLE with increasing numbers of gene defects. Combinations of severe defects in FcgammaRIIA and FcgammaRIIIA were particularly deleterious for both African American and Caucasian patients, even though only one defective variant was individually statistically significantly associated with SLE. CONCLUSIONS The results of the study suggest that genes may interact in ways that either synergize or modify the effect of a single genetic effect and imply that association studies must be interpreted within the genetic background of the populations.
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Affiliation(s)
- K E Sullivan
- University of Pennsylvania School of Medicine, Philadelphia, PA, USA.
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Abstract
CP27 is a gene that has been cloned from an E11 early embryonic library and has been suggested to mediate early organogenesis (Diekwisch et al., 1999, Gene 235, 19). We have hypothesized that CP27 exhibits its effects on organogenesis by affecting individual cell function. Based on the CP27 expression pattern we have selected the CP27 expressing embryonic fibroblast cell line BALB/c 3T3 to determine the effects of CP27 on cell function. CP27 loss of function strategies were performed by adding 5, 12.5 or 25 micro g/ml anti-CP27 antibody to cultured BALB/c 3T3 cells and comparing the results to controls in which identical concentrations of rabbit serum were added to the culture medium. Other controls included an antibody against another extracellular matrix protein amelogenin (negative control) and anti-CP27 antibodies directed against other areas of the CP27 molecule (positive control). Following cell culture, cell viability, apoptosis, cell proliferation, cell shape, cellular attachment and fibronectin matrix production were assayed using MTT colourimetric assay, BrdU staining, morphometry, immunostaining and western blot analysis. Block of CP27 function using an antibody strategy resulted in the following significant changes: (i) reduced viability, (ii) increased number of apoptotic cells, (iii) reduced proliferation, (iv) alterations in cell shape, (v) loss of attachment, and (vi) reduction in fibronectin matrix production. There was also a redistribution in fibronectin matrix organization demonstrated by immunohistochemistry. We conclude that CP27 plays an important role in the maintance of normal cell function and that CP27 block leads to significant changes in cellular behaviour.
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Affiliation(s)
- X Luan
- Brodie Laboratory for Craniofacil Genetics, University of Illinois at Chicago, IL, 60612, USA
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Zhang L, Luan X, Pan X, Xie G, Xu F, Liu D, Lei D. [Surgical management of subglottic carcinoma]. Zhonghua Er Bi Yan Hou Ke Za Zhi 2001; 36:451-3. [PMID: 12761963] [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: 03/02/2023]
Abstract
OBJECTIVE To explore the surgical management and evaluate the effect on patients with subglottic cancer. METHODS Fourteen cases with subglottic carcinoma were treated surgically from 1989 to 1998. There were T1-2N0 lesions in 5 cases, T3N0-2 lesions in 3 cases and T4N0-1 lesions in 6 cases. Eleven cases underwent partial laryngectomy and three cases underwent total laryngectomy. The defects of larynx were reconstructed by using uni-pedicled or bi-pedicled stemohyoid myofascial flap, platysma myocutaneous flap, sternocleidomastoid myoperiosteal flap, thyroid perichondral flap and epiglottis flap accordingly. Unilateral neck dissection was performed on 4 cases and bilateral on one. RESULTS The function of phonation had been restored in all cases except in 3 patients who underwent total laryngectomy. Seven out eleven(63.6%) were decannulated. The swallowing function was restored in all patients. In all cases the 3 and 5 year survival rates were 78.6%(11/14) and 63.6% (7/11), respectively. CONCLUSIONS The conservative surgery can be used for the majority of the subglottic carcinoma if the lesions were entirely resected. The proficiency in surgical methods is crucial for the preservation of laryngeal function.
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Affiliation(s)
- L Zhang
- Department of Otorhinolaryngology, Qilu Hospital, Shandong University, Jinan 250012, China
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Churikov D, Matsuoka M, Luan X, Gray AK, Brykov VA, Gharrett AJ. Assessment of concordance among genealogical reconstructions from various mtDNA segments in three species of Pacific salmon (genus Oncorhynchus). Mol Ecol 2001; 10:2329-39. [PMID: 11555274 DOI: 10.1046/j.1365-294x.2001.01354.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Seven segments of mitochondrial DNA (mtDNA), comprising 97% of the mitochondrial genome, were amplified by polymerase chain reaction (PCR) and examined for restriction site variation using 13 restriction endonucleases in three species of Pacific salmon: pink (Oncorhynchus gorbuscha), chum (O. keta) and sockeye (O. nerka) salmon. The distribution of variability across the seven mtDNA segments differed substantially among species. Little similarity in the distribution of variable restriction sites was found even between the mitochondrial genomes of the even- and odd-year broodlines of pink salmon. Significantly different levels of nucleotide diversity were detected among three groups of genes: six NADH-dehydrogenase genes had the highest; two rRNA genes had the lowest; and a group that included genes for ATPase and cytochrome oxidase subunits, the cytochrome b gene, and the control region had intermediate levels of nucleotide diversity. Genealogies of mtDNA haplotypes were reconstructed for each species, based on the variation in all mtDNA segments. The contributions of variation within different segments to resolution of the genealogical trees were compared within each species. With the exception of sockeye salmon, restriction site data from different genome segments tended to produce rather different trees (and hence rather different genealogies). In the majority of cases, genealogical information in different segments of mitochondrial genome was additive rather than congruent. This finding has a relevance to phylogeographic studies of other organisms and emphasizes the importance of not relying on a limited segment of the mtDNA genome to derive a phylogeographic structure.
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Affiliation(s)
- D Churikov
- Fisheries Division, School of Fisheries and Ocean Sciences, University of Alaska Fairbanks, 11120 Glacier Highway, Juneau, Alaska 99801, USA.
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Fang J, Wei X, Li S, Wang C, Tian A, Tao Y, Sun X, Zou S, Li M, Cai S, Luan X. [Clinical study of the sentinel lymph node of patients with laryngeal and hypopharyngeal carcinomas]. Zhonghua Er Bi Yan Hou Ke Za Zhi 2001; 36:244-6. [PMID: 12761986] [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: 03/02/2023]
Abstract
OBJECTIVE To investigate the methods of detecting the sentinel lymph node of laryngeal and hypopharyngeal carcinomas and its predictive value in the cervical metastasis of the carcinoma. METHODS In 29 patients who suffered from laryngeal or hypopharyngeal carcinoma with NO neck, the patent blue was injected into the surrounding tissue of the tumor during the operation to identify the sentinel lymph nodes. The sentinel lymph nodes were dyed blue. The frozen histopathology was done during the operation, the lymph nodes at the ipsilateral side of the neck were dissected completely, and the routine histopathology was done as the gold standard to study the predictive value of the sentinel lymph node in the metastasis of the cervical node. RESULTS Of 29 patients, 28 patients' sentinel lymph nodes were detected successfully during operation. There was an average of 2.5 lymph nodes per side per patient. Most of the sentinel lymph nodes were in the level II and level III regions of the ipsilateral side of the neck, and there were bilateral sentinel nodes in patients suffered from superglottic carcinoma. Three patients' sentinel lymph nodes were found to be positive in the frozen inspection, and the routine histopathology confirmed the result. The micrometastasis rate was 10.7% (3/28). There were no metastatic lymph nodes found in patients who were negative for the sentinel lymph nodes during the operative frozen histopathology. The predicted value of the sentinel lymph nodes to the cervical lymph node metastasis was 100 per cent. CONCLUSION There is a very important predicted value of sentinel lymph nodes in the cervical metastasis of patients suffered from laryngeal and hypopharyngeal carcinomas. It could reduce the neck dissection in patients with laryngeal and hypopharyngeal carcinomas.
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Affiliation(s)
- J Fang
- Department of Otorhinolaryngology, Qilu Hospital of Shandong University, Jinan 250012, China.
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