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Palodetto B, da Silva Santos Duarte A, Rodrigues Lopes M, Adolfo Corrocher F, Roversi FM, Soares Niemann F, Priscila Vieira Ferro K, Leda Figueiredo Longhini A, Melo Campos P, Favaro P, Teresinha Olalla Saad S. SEMA3A partially reverses VEGF effects through binding to neuropilin-1. Stem Cell Res 2017. [PMID: 28636974 DOI: 10.1016/j.scr.2017.05.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Cross-talk between hematopoietic stem cells (HSCs) and bone marrow stromal cells (BMSCs) is essential for HSCs regulation and leukemogenesis. Studying bone marrow of myelodysplasia patients, a pre-leukemic condition, we found mRNA overexpression of vascular endothelial growth factor A (VEGFA) in CD34+ HSCs and semaphorin 3A (SEMA3A) in BMSCs. To better understand the role of VEGFA and SEMA3A in leukemogenesis, we recruited 30 myelodysplastic syndrome (MDS) patients, 29 acute myeloid leukemia (6 secondary to MDS) patients and 12 controls. We found higher VEGFA expression in de novo AML patients (without prior MDS) group (p=0.0073) and higher SEMA3A expression in all BMSCs patient's samples compared to control group. We then overexpressed VEGFA in an acute myelogenous leukemia cell line, KG1 cells, and in normal CD34+ cells. This overexpression increased KG1 (p=0.045) and CD34+ cell (p=0.042) viability and KG1 (p=0.042) and CD34+ cell (p=0.047) proliferation. Moreover, KG1 and CD34+ cells overexpressing VEGFA also had increased proliferation when co-cultured with human marrow stromal HS5 cells (p=0.045 and p=0.02, respectively). However, co-culture of these transformed cells with HS5 cells overexpressing SEMA3A reduced KG1 (p=0.004) and CD34+ (p=0.009) proliferation. Co-culture of KG1 transformed cells with HS27 cells overexpressing SEMA3A reduced KG1 proliferation as well (p=0.01). To investigate whether the dominant SEMA3A effect over VEGFA could be due to competition for neuropilin1 receptor (NRP1), we performed immunoprecipitation with anti-NRP1 antibody of cell extracts of co-cultured KG1 and HS5 cells, induced or not by VEGFA and SEMA3A recombinant proteins. Results showed a preferential association of NRP1 with SEMA3A, suggesting that SEMA3A can partially reverse the effects caused by the VEGFA preventing its binding with the NRP1 receptor. Since both hematopoietic cells, leukemic and normal, showed similar behavior, we suppose that the attempt to reversion of VEGF effects by SEMA3A is a homeostatic phenomenon in the hematopoietic niche. Finally, we conclude that VEGFA overexpression confers AML cell advantages and SEMA3A may partially reverse this effect; thus, SEMA3A protein combined with VEGFA inhibitors could be beneficial for AML treatment.
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Affiliation(s)
- Bruna Palodetto
- Hematology and Blood Transfusion Center-University of Campinas/Hemocentro-Unicamp, Instituto Nacional de Ciência e Tecnologia do Sangue, Campinas, Brazil
| | - Adriana da Silva Santos Duarte
- Hematology and Blood Transfusion Center-University of Campinas/Hemocentro-Unicamp, Instituto Nacional de Ciência e Tecnologia do Sangue, Campinas, Brazil
| | - Matheus Rodrigues Lopes
- Hematology and Blood Transfusion Center-University of Campinas/Hemocentro-Unicamp, Instituto Nacional de Ciência e Tecnologia do Sangue, Campinas, Brazil
| | - Flavia Adolfo Corrocher
- Hematology and Blood Transfusion Center-University of Campinas/Hemocentro-Unicamp, Instituto Nacional de Ciência e Tecnologia do Sangue, Campinas, Brazil
| | - Fernanda Marconi Roversi
- Hematology and Blood Transfusion Center-University of Campinas/Hemocentro-Unicamp, Instituto Nacional de Ciência e Tecnologia do Sangue, Campinas, Brazil
| | - Fernanda Soares Niemann
- Hematology and Blood Transfusion Center-University of Campinas/Hemocentro-Unicamp, Instituto Nacional de Ciência e Tecnologia do Sangue, Campinas, Brazil
| | - Karla Priscila Vieira Ferro
- Hematology and Blood Transfusion Center-University of Campinas/Hemocentro-Unicamp, Instituto Nacional de Ciência e Tecnologia do Sangue, Campinas, Brazil
| | - Ana Leda Figueiredo Longhini
- Hematology and Blood Transfusion Center-University of Campinas/Hemocentro-Unicamp, Instituto Nacional de Ciência e Tecnologia do Sangue, Campinas, Brazil
| | - Paula Melo Campos
- Hematology and Blood Transfusion Center-University of Campinas/Hemocentro-Unicamp, Instituto Nacional de Ciência e Tecnologia do Sangue, Campinas, Brazil
| | - Patricia Favaro
- Hematology and Blood Transfusion Center-University of Campinas/Hemocentro-Unicamp, Instituto Nacional de Ciência e Tecnologia do Sangue, Campinas, Brazil; Department of Biological Sciences, Federal University of São Paulo, Diadema, Brazil
| | - Sara Teresinha Olalla Saad
- Hematology and Blood Transfusion Center-University of Campinas/Hemocentro-Unicamp, Instituto Nacional de Ciência e Tecnologia do Sangue, Campinas, Brazil.
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Affiliation(s)
- Ju Han Kim
- Division of Biomedical Informatics, Systems Biomedical Informatics Research Center Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul 110-799, Republic of Korea
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Wang B, Cunningham JM, Yang XH. Seq2pathway: an R/Bioconductor package for pathway analysis of next-generation sequencing data. Bioinformatics 2015; 31:3043-5. [PMID: 25979472 PMCID: PMC4565027 DOI: 10.1093/bioinformatics/btv289] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Accepted: 05/02/2015] [Indexed: 12/24/2022] Open
Abstract
UNLABELLED Seq2pathway is an R/Python wrapper for pathway (or functional gene-set) analysis of genomic loci, adapted for advances in genome research. Seq2pathway associates the biological significance of genomic loci with their target transcripts and then summarizes the quantified values on the gene-level into pathway scores. It is designed to isolate systematic disturbances and common biological underpinnings from next-generation sequencing (NGS) data. Seq2pathway offers Bioconductor users enhanced capability in discovering collective pathway effects caused by both coding genes and cis-regulation of non-coding elements. AVAILABILITY AND IMPLEMENTATION The package is freely available at http://www.bioconductor.org/packages/release/bioc/html/seq2pathway.html. CONTACT xyang2@uchicago.edu SUPPLEMENTARY INFORMATION Supplementary data are available at Bioinformatics online.
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Affiliation(s)
- Bin Wang
- Section of Hematology/Oncology, Department of Pediatrics, The University of Chicago, Chicago, IL, USA
| | - John M Cunningham
- Section of Hematology/Oncology, Department of Pediatrics, The University of Chicago, Chicago, IL, USA
| | - Xinan Holly Yang
- Section of Hematology/Oncology, Department of Pediatrics, The University of Chicago, Chicago, IL, USA
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