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Chan SM, Raglow Z, Pal A, Gitlin SD, Legendre M, Thomas D, Mehta RK, Tan M, Nyati MK, Rehemtulla A, Markovitz DM. A molecularly engineered lectin destroys EGFR and inhibits the growth of non-small cell lung cancer. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.18.585535. [PMID: 38562773 PMCID: PMC10983887 DOI: 10.1101/2024.03.18.585535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Survival rates for non-small cell lung cancer (NSCLC) remain low despite the advent of novel therapeutics. Tyrosine kinase inhibitors (TKIs) targeting mutant epidermal growth factor receptor (EGFR) in NSCLC have significantly improved mortality but are plagued with challenges--they can only be used in the small fraction of patients who have susceptible driver mutations, and resistance inevitably develops. Aberrant glycosylation on the surface of cancer cells is an attractive therapeutic target as these abnormal glycosylation patterns are typically specific to cancer cells and are not present on healthy cells. H84T BanLec (H84T), a lectin previously engineered by our group to separate its antiviral activity from its mitogenicity, exhibits precision binding of high mannose, an abnormal glycan present on the surface of many cancer cells, including NSCLC. Here, we show that H84T binds to and inhibits the growth of diverse NSCLC cell lines by inducing lysosomal degradation of EGFR and leading to cancer cell death through autophagy. This is a mechanism distinct from EGFR TKIs and is independent of EGFR mutation status; H84T inhibited proliferation of both cell lines expressing wild type EGFR and those expressing mutant EGFR that is resistant to all TKIs. Further, H84T binds strongly to multiple and diverse clinical samples of both pulmonary adenocarcinoma and squamous cell carcinoma. H84T is thus a promising potential therapeutic in NSCLC, with the ability to circumvent the challenges currently faced by EGFR TKIs.
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Niosomes Functionalized with a Synthetic Carbohydrate Binding Agent for Mannose-Targeted Doxorubicin Delivery. Pharmaceutics 2023; 15:pharmaceutics15010235. [PMID: 36678863 PMCID: PMC9863333 DOI: 10.3390/pharmaceutics15010235] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 12/02/2022] [Accepted: 01/05/2023] [Indexed: 01/13/2023] Open
Abstract
Niosomes are a potential tool for the development of active targeted drug delivery systems (DDS) for cancer therapy because of their excellent behaviour in encapsulating antitumorals and the possibility to easily functionalise their surface with targeting agents. Recently, some of us developed a synthetic carbohydrate binding agent (CBA) able to target the mannosidic residues of high-mannose-type glycans overexpressed on the surface of several cancer cell lines, promoting their apoptosis. In this article, we modified the structure of this mannose receptor to obtain an amphiphilic analogue suitable for the functionalization of doxorubicin-based niosomes. Several niosomal formulations and preparation methods were investigated deeply to finally obtain functionalized niosomes suitable for parental administration, which were stable for over six months and able to encapsulate up to 85% of doxorubicin (DOXO). In vitro studies, carried out towards triple-negative cancer cells (MDA-MB231), overexpressing high-mannose-type glycans, showed a cytotoxic activity comparable to that of DOXO but with an appreciable increment in apoptosis given by the CBA. Moreover, niosomal formulation was observed to reduce doxorubicin-induced cytotoxicity towards normal cell lines of rat cardiomyocytes (H9C2). This study is propaedeutic to further in vivo investigations that can aim to shed light on the antitumoral activity and pharmacokinetics of the developed active targeted DDS.
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Lee JH, Lee SB, Kim H, Shin JM, Yoon M, An HS, Han JW. Anticancer Activity of Mannose-Specific Lectin, BPL2, from Marine Green Alga Bryopsis plumosa. Mar Drugs 2022; 20:md20120776. [PMID: 36547923 PMCID: PMC9788543 DOI: 10.3390/md20120776] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 12/05/2022] [Accepted: 12/07/2022] [Indexed: 12/15/2022] Open
Abstract
Lectin is a carbohydrate-binding protein that recognizes specific cells by binding to cell-surface polysaccharides. Tumor cells generally show various glycosylation patterns, making them distinguishable from non-cancerous cells. Consequently, lectin has been suggested as a good anticancer agent. Herein, the anticancer activity of Bryopsis plumosa lectins (BPL1, BPL2, and BPL3) was screened and tested against lung cancer cell lines (A549, H460, and H1299). BPL2 showed high anticancer activity compared to BPL1 and BPL3. Cell viability was dependent on BPL2 concentration and incubation time. The IC50 value for lung cancer cells was 50 μg/mL after 24 h of incubation in BPL2 containing medium; however, BPL2 (50 μg/mL) showed weak toxicity in non-cancerous cells (MRC5). BPL2 affected cancer cell growth while non-cancerous cells were less affected. Further, BPL2 (20 μg/mL) inhibited cancer cell invasion and migration (rates were ˂20%). BPL2 induced the downregulation of epithelial-to-mesenchymal transition-related genes (Zeb1, vimentin, and Twist). Co-treatment with BPL2 and gefitinib (10 μg/mL and 10 μM, respectively) showed a synergistic effect compared with monotherapy. BPL2 or gefitinib monotherapy resulted in approximately 90% and 70% cell viability, respectively, with concomitant treatment showing 40% cell viability. Overall, BPL2 can be considered a good candidate for development into an anticancer agent.
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4
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Hao Y, Zeng Z, Peng X, Ai P, Han Q, Ren B, Li M, Wang H, Zhou X, Zhou X, Ma Y, Cheng L. The human oral - nasopharynx microbiome as a risk screening tool for nasopharyngeal carcinoma. Front Cell Infect Microbiol 2022; 12:1013920. [PMID: 36530430 PMCID: PMC9748088 DOI: 10.3389/fcimb.2022.1013920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 10/12/2022] [Indexed: 12/03/2022] Open
Abstract
Nasopharyngeal carcinoma (NPC) is a common head and neck cancer with a poor prognosis. There is an urgent need to develop a simple and convenient screening tool for early detection and risk screening of NPC. 139 microbial samples were collected from 40 healthy people and 39 patients with nasopharyngeal biopsy. A total of 40 and 39 oral, eight and 27 nasal cavity, nine and 16 nasopharyngeal microbial samples were collected from the two sets of individuals. A risk screening tool for NPC was established by 16S rDNA sequencing and random forest. Patients with nasopharyngeal biopsy had significantly lower nasal cavity and nasopharynx microbial diversities than healthy people. The beta diversity of the oral microbiome was significantly different between the two groups. The NPC screening tools based on nasopharyngeal and oral microbiomes have 88% and 77.2% accuracies, respectively. The nasopharyngeal biopsy patients had significantly higher Granulicatella abundance in their oral cavity and lower Pseudomonas and Acinetobacter in the nasopharynx than healthy people. This study established microbiome-based non-invasive, simple, no radiation, and low-cost NPC screening tools. Individuals at a high risk of NPC should be advised to seek further examination, which might improve the early detection of NPC and save public health costs.
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Affiliation(s)
- Yu Hao
- State Key Laboratory of Oral Diseases & West China Hospital of Stomatology & National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu, China,Department of Operative Dentistry and Endodontics, West China School of Stomatology, Sichuan University, Chengdu, China
| | - Zhi Zeng
- Head & Neck Oncology Ward, Cancer Center, West China Hospital, Sichuan University, Chengdu, China
| | - Xian Peng
- State Key Laboratory of Oral Diseases & West China Hospital of Stomatology & National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu, China
| | - Ping Ai
- Division of Radiotherapy, Cancer Center, West China Hospital, Sichuan University, Chengdu, China
| | - Qi Han
- State Key Laboratory of Oral Diseases & West China Hospital of Stomatology & National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu, China,Department of Oral Pathology, West China School of Stomatology, Sichuan University, Chengdu, China
| | - Biao Ren
- State Key Laboratory of Oral Diseases & West China Hospital of Stomatology & National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu, China
| | - Mingyun Li
- State Key Laboratory of Oral Diseases & West China Hospital of Stomatology & National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu, China
| | - Haohao Wang
- State Key Laboratory of Oral Diseases & West China Hospital of Stomatology & National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu, China,Department of Operative Dentistry and Endodontics, West China School of Stomatology, Sichuan University, Chengdu, China
| | - Xinxuan Zhou
- State Key Laboratory of Oral Diseases & West China Hospital of Stomatology & National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu, China
| | - Xuedong Zhou
- State Key Laboratory of Oral Diseases & West China Hospital of Stomatology & National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu, China,Department of Operative Dentistry and Endodontics, West China School of Stomatology, Sichuan University, Chengdu, China
| | - Yue Ma
- West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, China,*Correspondence: Lei Cheng, ; Yue Ma,
| | - Lei Cheng
- State Key Laboratory of Oral Diseases & West China Hospital of Stomatology & National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu, China,Department of Operative Dentistry and Endodontics, West China School of Stomatology, Sichuan University, Chengdu, China,*Correspondence: Lei Cheng, ; Yue Ma,
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Wu B, Dou G, Zhang Y, Wang J, Wang X, Jiang S, Zhong S, Ren J, Zhang Z, Li J, Sheng C, Zhao G, Zhao L. Identification of key pathways and genes in vestibular schwannoma using bioinformatics analysis. Exp Ther Med 2022; 23:217. [PMID: 35126720 DOI: 10.3892/etm.2022.11141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Accepted: 10/06/2020] [Indexed: 02/05/2023] Open
Abstract
The aim of the present study is to identify novel promising marks and targets of diagnosis, therapy and prognosis for patients with vestibular schwannoma at the molecular level. The gene expression profiles of GSE54934, GSE39645 and GSE56597 datasets were obtained respectively from the Gene Expression Omnibus database. The differentially expressed genes (DEGs) were identified by comparing between gene expression profiles of the vestibular schwannoma tissues and normal tissues. Subsequently, Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis and protein-protein interaction (PPI) network analysis were performed. The function and pathway enrichment analysis were performed for DEGs with DAVID. Reverse transcription-quantitative PCR were conducted to confirm the expression of BCL2, AGT, IL6 and ITGA2 in human Schwann cells and vestibular schwannoma cells. A total of 4,025, 1,1291 and 1,513 DEGs were identified from GSE54934, GSE56597 and GSE39645 datasets, respectively. GO and KEGG analysis showed that the mutual upregulated genes were mainly enriched in cell division, mitotic nuclear division, and transition of mitotic cell cycle, whilst mutual downregulated genes were enriched in chemical synaptic transmission, neurotransmitter transport, and synaptic vesicle membrane. Subsequently, 20 genes, including BCL2, AGT, IL6 and ITGA2 were selected as hub genes with high degrees after PPI network analysis. The significant differential expression of those genes were detected among vestibular schwannoma tissues compared with normal nerve tissues. In conclusion, BCL2, AGT, IL6 and ITGA2 are significantly higher expressed in vestibular schwannoma tissues compared with human Schwann tissues. The DEGs identified in the present study provide novel targets for the diagnosis and treatment of vestibular schwannoma.
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Affiliation(s)
- Bo Wu
- Clinical College, Jilin University, Changchun, Jilin 130021, P.R. China.,Department of Orthopedics, The First Bethune Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Gaojing Dou
- Clinical College, Jilin University, Changchun, Jilin 130021, P.R. China.,Department of Breast Surgery, The First Bethune Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Yuan Zhang
- Clinical College, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Jing Wang
- Clinical College, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Xinhui Wang
- Clinical College, Jilin University, Changchun, Jilin 130021, P.R. China.,Department of Oncology, The First Bethune Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Shanshan Jiang
- Institute of Zoology, China Academy of Science, Beijing 100049, P.R. China
| | - Sheng Zhong
- Department of Neurosurgery, Cancer Hospital of Sun Yat Sen University, Guangzhou, Guangdong 510060, P.R. China
| | - Junan Ren
- Clinical College, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Zhiyun Zhang
- Clinical College, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Jiahui Li
- Department of Pharmacy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Chunjia Sheng
- Clinical College, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Gang Zhao
- Department of Neurosurgery, The First Bethune Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Liyan Zhao
- Department of Clinical Laboratory, The Second Hospital of Jilin University, Changchun, Jilin 130041, P.R. China
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Davidsen J, Jessen SB, Watt SK, Larsen S, Dahlgaard K, Kirkegaard T, Gögenur I, Troelsen JT. CDX2 expression and perioperative patient serum affects the adhesion properties of cultured colon cancer cells. BMC Cancer 2020; 20:426. [PMID: 32408894 PMCID: PMC7227097 DOI: 10.1186/s12885-020-06941-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 05/10/2020] [Indexed: 02/28/2023] Open
Abstract
Background Colon cancer is one of the most commonly diagnosed types of cancer with surgical resection of the tumor being the primary choice of treatment. However, the surgical stress response induced during treatment may be related to a higher risk of recurrence. The aim of this study was to examine the effect of surgery on adhesion of cultured colon cancer cells with or without expression of the tumour suppressor CDX2. Method We enrolled 30 patients undergoing elective, curatively intended laparoscopic surgery for colon cancer in this study. Blood samples were drawn 1 day prior to surgery and 24 h after surgery. The samples of pre- and postoperative serum was applied to wild type colon cancer LS174T cells and CDX2 inducible LS174T cells and adhesion was measured with Real-Time Cell-Analysis iCELLigence using electrical impedance as a readout to monitor changes in the cellular adhesion. Results Adhesion abilities of wild type LS174T cells seeded in postoperative serum was significantly increased compared to cells seeded in preoperative serum. When seeding the CDX2 inducible LS174T cells without CDX2 expression in pre- and postoperative serum, no significant difference in adhesion was found. However, when inducing CDX2 expression in these cells, the adhesion abilities in pre- and postoperative serum resembled those of the LS174T wild type cell line. Conclusions We found that the adhesion of colon cancer cells was significantly increased in postoperative versus preoperative serum, and that CDX2 expression affected the adhesive ability of cancer cells. The results of this study may help to elucidate the pro-metastatic mechanisms in the perioperative phase and the role of CDX2 in colon cancer metastasis.
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Affiliation(s)
- Johanne Davidsen
- Department of Science and Environment, Enhanced Perioperative Oncology (EPeOnc) Consortium, Roskilde University, Universitetsvej 1, 4000, Roskilde, Denmark.,Center for Surgical Science, Enhanced Perioperative Oncology (EPeOnc) Consortium, Department of Surgery, Zealand University Hospital, Lykkebækvej 1, 4600, Køge, Denmark
| | - Stine Bull Jessen
- Department of Science and Environment, Enhanced Perioperative Oncology (EPeOnc) Consortium, Roskilde University, Universitetsvej 1, 4000, Roskilde, Denmark.,Center for Surgical Science, Enhanced Perioperative Oncology (EPeOnc) Consortium, Department of Surgery, Zealand University Hospital, Lykkebækvej 1, 4600, Køge, Denmark
| | - Sara Kehlet Watt
- Center for Surgical Science, Enhanced Perioperative Oncology (EPeOnc) Consortium, Department of Surgery, Zealand University Hospital, Lykkebækvej 1, 4600, Køge, Denmark
| | - Sylvester Larsen
- Department of Science and Environment, Enhanced Perioperative Oncology (EPeOnc) Consortium, Roskilde University, Universitetsvej 1, 4000, Roskilde, Denmark.,Department of Clinical Immunology, Naestved Hospital, Ringstedgade 77B, 4700, Naestved, Denmark
| | - Katja Dahlgaard
- Department of Science and Environment, Enhanced Perioperative Oncology (EPeOnc) Consortium, Roskilde University, Universitetsvej 1, 4000, Roskilde, Denmark
| | - Tove Kirkegaard
- Center for Surgical Science, Enhanced Perioperative Oncology (EPeOnc) Consortium, Department of Surgery, Zealand University Hospital, Lykkebækvej 1, 4600, Køge, Denmark
| | - Ismail Gögenur
- Center for Surgical Science, Enhanced Perioperative Oncology (EPeOnc) Consortium, Department of Surgery, Zealand University Hospital, Lykkebækvej 1, 4600, Køge, Denmark
| | - Jesper T Troelsen
- Department of Science and Environment, Enhanced Perioperative Oncology (EPeOnc) Consortium, Roskilde University, Universitetsvej 1, 4000, Roskilde, Denmark.
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Crosstalk between Epidermal Growth Factor Receptors (EGFR) and integrins in resistance to EGFR tyrosine kinase inhibitors (TKIs) in solid tumors. Eur J Cell Biol 2020; 99:151083. [PMID: 32381360 DOI: 10.1016/j.ejcb.2020.151083] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 04/17/2020] [Accepted: 04/18/2020] [Indexed: 12/21/2022] Open
Abstract
Cell adhesion to the extracellular matrix (ECM) is important in a variety of physiological and pathologic processes, including development, tumor invasion, and metastasis. Integrin-mediated attachment to ECM proteins has emerged to cue events primitively important for the transformed phenotype of human cancer cells. Cross-talk between integrins and growth factor receptors takes an increasingly prominent role in defining adhesion, motility, and cell growth. This functional interaction has expanded beyond to link integrins with resistance to Tyrosine kinase inhibitors (TKIs) of Epidermal Growth Factor Receptors (EGFRs). In this regard, integrin-mediated adhesion has two separate functions one as a clear collaborator with growth factor receptor signaling and the second as a basic mechanism contributing in Epithelial to Mesenchymal Transition (EMT) which affects response to chemotherapy. This review provides an overview of these mechanisms and describes treatment options for selectively targeting and disrupting integrin interaction to EGFR for cancer therapy.
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8
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Angeline N, Suhito IR, Kim CH, Hong GP, Park CG, Bhang SH, Luo Z, Kim TH. A fibronectin-coated gold nanostructure composite for electrochemical detection of effects of curcumin-carrying nanoliposomes on human stomach cancer cells. Analyst 2019; 145:675-684. [PMID: 31803868 DOI: 10.1039/c9an01553a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Curcumin, which is produced by the medicinal herbaceous plant Curcuma longa, has been widely investigated for use as a potential anticancer drug. In this study, the potential toxicity of curcumin-carrying nanoliposomes (curcumin-NLC) toward human stomach cancer cells (MKN-28) was investigated using a new cell-based electrochemical sensing platform. To satisfy both biocompatibility and electroconductivity of the electrodes, the density of the gold nanostructure and the coating conditions of extracellular matrix proteins (fibronectin and collagen) were optimized. The developed platform enabled the successful adhesion and long-term growth of stomach cancer cells on the chip surface, allowing label-free and real-time monitoring of cell viability in a quantitative manner. According to the electrochemical results, both bare curcumin and curcumin-NLC showed toxicity toward MKN-28 cells in the concentration range of 10-100 μM, which was consistent with the results obtained from a conventional colorimetric method (CCK-8). Remarkably, at a low concentration range (<50 μM), this electrochemical platform determined the decrease in cell viability to be approximately 22.8%, 33.9% and 53.1% in the presence of 10, 30, and 50 μM of curcumin-NLC, respectively, compared with the 1.3%, 18.5%, and 28.1% determined by CCK-8, making it 1.7-2 times more sensitive than the conventional colorimetric assay. Hence, it can be concluded that the newly developed fibronectin-coated electroconductive platform is highly promising as an electrochemical detection tool for the sensitive and precise assessment of the anticancer effects of various food-derived compounds with low toxicity.
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Affiliation(s)
- Novi Angeline
- School of Integrative Engineering, Chung-Ang University, Seoul 06974, Republic of Korea.
| | - Intan Rosalina Suhito
- School of Integrative Engineering, Chung-Ang University, Seoul 06974, Republic of Korea.
| | - Cheol-Hwi Kim
- School of Integrative Engineering, Chung-Ang University, Seoul 06974, Republic of Korea.
| | - Geun-Pyo Hong
- Department of Food Science and Biotechnology, Sejong University, Seoul 05006, Republic of Korea
| | - Chun Gwon Park
- Department of Biomedical Engineering, Sungkyunkwan University Institute for Convergence, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Suk Ho Bhang
- School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Zhengtang Luo
- Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Kowloon 999077, Hong Kong, China
| | - Tae-Hyung Kim
- School of Integrative Engineering, Chung-Ang University, Seoul 06974, Republic of Korea. and Integrative Research Center for Two-Dimensional Functional Materials, Institute of Interdisciplinary Convergence Research, Chung-Ang University, Seoul 06974, Republic of Korea
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9
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High Mannose Binding Lectin (PFL) from Pseudomonas fluorescens Down-Regulates Cancer-Associated Integrins and Immune Checkpoint Ligand B7-H4. Cancers (Basel) 2019; 11:cancers11050604. [PMID: 31052260 PMCID: PMC6562446 DOI: 10.3390/cancers11050604] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 04/17/2019] [Accepted: 04/28/2019] [Indexed: 11/26/2022] Open
Abstract
Pseudomonas fluorescens lectin (PFL), which belongs to the high mannose (HM)-binding OAAH (Oscillatoria agardhii agglutinin homologue) lectin family, induces cancer cell death. However, the detailed mechanisms underlying this process have not yet been elucidated. We found that PFL decreased various integrins as well as EGFR in cancer cells by promoting internalization and autophagic degradation of these molecules, subsequently inducing caspase-8 dependent cell apoptosis. As revealed by an ex vivo angiogenesis assay using the rat aortic model, PFL inhibited neovascularization in a dose-dependent manner, which was potentially mediated by down-regulation of endothelium integrins. Interestingly, PFL also down-regulated B7-H4 in cancer cells, which has been implicated as a negative regulator of T cell-mediated immunity. We found that B7-H4 co-localized with β3 integrin in MKN28 gastric cancer cells. siRNA silencing of B7-H4 in MKN28 cells decreased expression of β3 integrin, suggesting physical and functional association between these molecules. Direct interaction of PFL with integrin αvβ3 or B7-H4 was examined by surface plasmon resonance analysis, which detected high affinity glycan-dependent binding to PFL. These investigations suggest that PFL interaction with cell surface integrins is a key process for the anti-cancer activities of PFL.
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10
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Zhang F, Hu X, Gu Y, Bian H, Xu Z, Wang Q, Chen J, Lu Y, Sun L, Zheng Q, Gu J. URI knockdown induces autophagic flux in gastric cancer cells. Am J Cancer Res 2018; 8:2140-2149. [PMID: 30416863 PMCID: PMC6220146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Accepted: 09/21/2018] [Indexed: 06/09/2023] Open
Abstract
URI, a member of the prefoldin family of molecular chaperones, functions in the regulation of nutrient-sensitive, mTOR-dependent transcription signaling pathways. Previous studies of several tumor types demonstrated that URI exhibits characteristics similar to those of an oncoprotein. URI has been shown as a mitochondrial substrate of S6 kinase 1 (S6K1), which acts to integrate nutrient and growth factor signals to promote cell growth and survival. Notably, the Akt/mTOR/p70S6K signaling pathway constitutes major negative regulatory mechanism of autophagy. However, the role of URI in autophagy has not been explored. Here, we investigated the involvement of URI in autophagy by manipulating its expression in MGC-803 and HGC-27 cells using siRNA and transfection approaches. GFP-LC3 punctum aggregation was assessed by confocal microscopy, whereas formation of autophagic vesicles was assessed using transmission electron microscopy. NH4Cl was used to inhibit autophagosome-lysosome fusion and to monitor autophagic flux. Expression of LC3-I, LC3-II, beclin1, total and phosphorylated mTOR, and p70S6k was assessed by Western blotting. The results showed that knockdown of URI induced significant autophagic flux in gastric cancer cells. URI regulates the expression of beclin1, which is essential for initiation of conventional autophagy. Levels of p-mTOR (Ser2448) and p-p70S6K (Thr389) increased in URI-overexpressing cells treated with the mTOR inhibitor rapamycin but decreased in URI-silenced cells. The inhibitory effect of URI silencing on mTOR and p70S6K phosphorylation was antagonized by the autophagy inhibitor 3-methyladenine. These results suggest that URI knockdown-induced autophagy is associated with the mTOR/p70S6K signaling pathway, indicating the potential existence of a novel autophagy regulatory mechanism mediated by URI.
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Affiliation(s)
- Fei Zhang
- Department of Hematology and Hematological Laboratory Science, Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu UniversityZhenjiang 212013, Jiangsu, China
| | - Xiaoxia Hu
- Department of Hematology and Hematological Laboratory Science, Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu UniversityZhenjiang 212013, Jiangsu, China
- Department of Clinical Laboratory, Shanghai Pudong Gongli HospitalShanghai 200135, China
| | - Yu Gu
- Department of Hematology and Hematological Laboratory Science, Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu UniversityZhenjiang 212013, Jiangsu, China
- Department of Hematology, Affiliated People’s Hospital of Jiangsu UniversityZhenjiang 212013, Jiangsu, China
| | - Huiqin Bian
- Department of Hematology and Hematological Laboratory Science, Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu UniversityZhenjiang 212013, Jiangsu, China
| | - Zhonghai Xu
- Department of Hematology and Hematological Laboratory Science, Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu UniversityZhenjiang 212013, Jiangsu, China
| | - Qian Wang
- Department of Hematology and Hematological Laboratory Science, Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu UniversityZhenjiang 212013, Jiangsu, China
| | - Jinnan Chen
- Department of Hematology and Hematological Laboratory Science, Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu UniversityZhenjiang 212013, Jiangsu, China
| | - Yaojuan Lu
- Department of Hematology and Hematological Laboratory Science, Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu UniversityZhenjiang 212013, Jiangsu, China
- Shenzhen Academy of Peptide Targeting Technology at PingshanShenzhen 518118, China
| | - Lichuan Sun
- Department of Medicine, School of Medicine, Tulane Health Sciences CenterNew Orleans, LA 70112-2699, USA
- Shenzhen Academy of Peptide Targeting Technology at PingshanShenzhen 518118, China
| | - Qiping Zheng
- Department of Hematology and Hematological Laboratory Science, Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu UniversityZhenjiang 212013, Jiangsu, China
- Shenzhen Academy of Peptide Targeting Technology at PingshanShenzhen 518118, China
| | - Junxia Gu
- Department of Hematology and Hematological Laboratory Science, Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu UniversityZhenjiang 212013, Jiangsu, China
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11
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Pham VTH, Murugaraj P, Mathes F, Tan BK, Truong VK, Murphy DV, Mainwaring DE. Copolymers enhance selective bacterial community colonization for potential root zone applications. Sci Rep 2017; 7:15902. [PMID: 29162884 PMCID: PMC5698314 DOI: 10.1038/s41598-017-16253-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 11/08/2017] [Indexed: 12/31/2022] Open
Abstract
Managing the impact of anthropogenic and climate induced stress on plant growth remains a challenge. Here we show that polymeric hydrogels, which maintain their hydrous state, can be designed to exploit functional interactions with soil microorganisms. This microbial enhancement may mitigate biotic and abiotic stresses limiting productivity. The presence of mannan chains within synthetic polyacrylic acid (PAA) enhanced the dynamics and selectivity of bacterial ingress in model microbial systems and soil microcosms. Pseudomonas fluorescens exhibiting high mannan binding adhesins showed higher ingress and localised microcolonies throughout the polymeric network. In contrast, ingress of Bacillus subtilis, lacking adhesins, was unaltered by mannan showing motility comparable to bulk liquids. Incubation within microcosms of an agricultural soil yielded hydrogel populations significantly increased from the corresponding soil. Bacterial diversity was markedly higher in mannan containing hydrogels compared to both control polymer and soil, indicating enhanced selectivity towards microbial families that contain plant beneficial species. Here we propose functional polymers applied to the potential root zone which can positively influence rhizobacteria colonization and potentially plant growth as a new approach to stress tolerance.
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Affiliation(s)
- Vy T H Pham
- School of Science, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
| | - Pandiyan Murugaraj
- School of Science, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
| | - Falko Mathes
- SoilsWest, UWA School of Agriculture and Environment, Faculty of Science, The University of Western Australia, Crawley, WA6009, Australia
| | - Boon K Tan
- School of Science, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
| | - Vi Khanh Truong
- School of Science, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
| | - Daniel V Murphy
- SoilsWest, UWA School of Agriculture and Environment, Faculty of Science, The University of Western Australia, Crawley, WA6009, Australia
| | - David E Mainwaring
- School of Science, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC 3122, Australia.
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12
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Hosseini F, Hassannia H, Mahdian‐Shakib A, Jadidi‐Niaragh F, Enderami SE, Fattahi M, Anissian A, Mirshafiey A, Kokhaei P. Targeting of crosstalk between tumor and tumor microenvironment by β-D mannuronic acid (M2000) in murine breast cancer model. Cancer Med 2017; 6:640-650. [PMID: 28211615 PMCID: PMC5345625 DOI: 10.1002/cam4.1013] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 12/06/2016] [Accepted: 12/15/2016] [Indexed: 12/16/2022] Open
Abstract
Metastasis is the main cause of death in breast cancer patients. Inflammatory processes following crosstalk between tumor cells and tumor microenvironment play an important role in progression and metastasis of cancer. Hence, targeting of these interactions may represent a novel promising strategy for breast cancer therapy. So, we investigated the effects of β-D mannuronic acid (BDM), a new antiinflammatory agent, on 4T1 breast cancer cell line both in vitro and in vivo. Proliferation assays revealed low-cytotoxic effect of BDM on 4T1 cells. However, BDM reduced activity of MMP-2, MMP-9 and significantly decreased the adhesion of 4T1 cells to extracellular matrix (ECM) in a dose-dependent manner. The in vivo results demonstrated that BDM strongly inhibits tumor growth and increases lifespan as compared with control mice. The decrease in tumor mass was associated with decreased metastasis, recruitment, and frequency of inflammatory cells in tumor tissue. Our preclinical findings demonstrated that BDM therapy not only prevents formation of chronic inflammatory response but also inhibits crosstalk between tumor cells and their microenvironment, which is associated with reduction of tumor growth and metastasis arrest. Our data imply the use of BDM therapy in future clinical trials to open a new horizon for breast cancer therapy.
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Affiliation(s)
- Fatemeh Hosseini
- Cancer Research Center and Department of ImmunologySemnan University of Medical SciencesSemnanIran
| | - Hadi Hassannia
- Department of ImmunologySchool of Public HealthTehran University of Medical SciencesTehranIran
| | - Ahmad Mahdian‐Shakib
- Department of ImmunologySchool of Public HealthTehran University of Medical SciencesTehranIran
| | - Farhad Jadidi‐Niaragh
- Drug Applied Research CenterTabriz University of Medical SciencesTabrizIran
- Department of ImmunologyFaculty of MedicineTabriz University of Medical SciencesTabrizIran
| | | | - Mohammadjavad Fattahi
- Department of ImmunologySchool of Public HealthTehran University of Medical SciencesTehranIran
- Shiraz institute for cancer researchShiraz, University of Medical SciencesShirazIran
| | - Ali Anissian
- Department of Veterinary MedicineIslamic Azad UniversityAbharAbhar branchIran
| | - Abbas Mirshafiey
- Department of ImmunologySchool of Public HealthTehran University of Medical SciencesTehranIran
| | - Parviz Kokhaei
- Cancer Research Center and Department of ImmunologySemnan University of Medical SciencesSemnanIran
- Department of Oncology‐PathologyImmune and Gene Therapy LaboratoryCancer Centre KarolinskaKarolinska InstitutetStockholmSweden
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13
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Anti-influenza virus activity of high-mannose binding lectins derived from genus Pseudomonas. Virus Res 2016; 223:64-72. [PMID: 27374061 PMCID: PMC7173227 DOI: 10.1016/j.virusres.2016.06.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 06/28/2016] [Indexed: 12/11/2022]
Abstract
Three Pseudomonas-derived lectins: PFL, PML, and PTL, have been examined for anti-influenza virus activity against several strains of influenza virus. These lectins would bind high-mannose glycan and blocked the entry of influenza virus into the host cells. It is expected that these lectins could have an antiviral activity against not only influenza virus but also other enveloped viruses including HIV as described by many other studies. These three lectins will be applicable to a novel microbicide.
Lectin PFL binding high-mannose glycan derived from Pseudomonas fluorescens and other homologous lectins: PML derived from Pseudomonas mandelii and PTL derived from Pseudomonas taiwanensis were examined for antiviral activity. The cDNA of these lectin genes were synthesized, cloned, expressed in Escherichia coli. The expressed lectins were purified by gel filtrations, and supplied to cultures infected with several strains of influenza virus. These three lectins have inhibited propagation of influenza viruses with a similar extent, 50% of inhibition-dose was around ten nanomolar concentration. An immunofluorescent microscopy, a microarray analysis, and several infection experiments with different time periods of lectin addition or using the competitor substrates indicated that binding of these lectins with high-mannose glycan on HA protein of influenza virus could block the virus entry into the host cells, thereby resulting in inhibition of the virus propagation. These Pseudomonas-derived lectins would be protential and attractive antiviral agents targeting glycoproteins of enveloped viruses including influenza virus.
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