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González-Montalvo MA, Tavares-Carreón F, González GM, Villanueva-Lozano H, García-Romero I, Zomosa-Signoret VC, Valvano MA, Andrade A. Defining chaperone-usher fimbriae repertoire in Serratia marcescens. Microb Pathog 2021; 154:104857. [PMID: 33762200 DOI: 10.1016/j.micpath.2021.104857] [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: 01/06/2021] [Accepted: 03/12/2021] [Indexed: 11/28/2022]
Abstract
Chaperone-usher (CU) fimbriae are surface organelles particularly prevalent among the Enterobacteriaceae. Mainly associated to their adhesive properties, CU fimbriae play key roles in biofilm formation and host cell interactions. Little is known about the fimbriome composition of the opportunistic human pathogen Serratia marcescens. Here, by using a search based on consensus fimbrial usher protein (FUP) sequences, we identified 421 FUPs across 39 S. marcescens genomes. Further analysis of the FUP-containing loci allowed us to classify them into 20 conserved CU operons, 6 of which form the S. marcescens core CU fimbriome. A new systematic nomenclature is proposed according to FUP sequence phylogeny. We also established an in vivo transcriptional assay comparing CU promoter expression between an environmental and a clinical isolate of S. marcescens, which revealed that promoters from 3 core CU operons (referred as fgov, fpo, and fps) are predominantly expressed in the two strains and might represent key core adhesion appendages contributing to S. marcescens pathogenesis.
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Affiliation(s)
- Martín A González-Montalvo
- Universidad Autónoma de Nuevo León, Facultad de Medicina, Departamento de Microbiología, Monterrey, Nuevo León, 64460, Mexico
| | - Faviola Tavares-Carreón
- Universidad Autónoma de Nuevo León, Facultad de Ciencias Biológicas, San Nicolás de los Garza, Nuevo León, 66455, Mexico
| | - Gloria M González
- Universidad Autónoma de Nuevo León, Facultad de Medicina, Departamento de Microbiología, Monterrey, Nuevo León, 64460, Mexico
| | - Hiram Villanueva-Lozano
- Universidad Autónoma de Nuevo León, Facultad de Medicina, Departamento de Microbiología, Monterrey, Nuevo León, 64460, Mexico
| | - Inmaculada García-Romero
- Wellcome-Wolfson Institute for Experimental Medicine, Queen's University Belfast, Belfast, BT9 7BL, United Kingdom
| | - Viviana C Zomosa-Signoret
- Universidad Autónoma de Nuevo León, Facultad de Medicina, Departamento de Bioquímica y Medicina Molecular, Monterrey, Nuevo León, 64460, Mexico
| | - Miguel A Valvano
- Wellcome-Wolfson Institute for Experimental Medicine, Queen's University Belfast, Belfast, BT9 7BL, United Kingdom
| | - Angel Andrade
- Universidad Autónoma de Nuevo León, Facultad de Medicina, Departamento de Microbiología, Monterrey, Nuevo León, 64460, Mexico.
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A. Flores-Contreras E, Gonz醠ez-Gonz醠ez E, I. Zaraz鷄-Ni駉 A, N. Garza-Trevi駉 E, Mart韓ez-Acu馻 N, C. Zomosa-Signoret V, Vidaltamayo R, E. Mu駉z-Maldonado G, Garza-Guajardo R, de J. Garc韆-Sol韘 M, Abarca-Blanco A, M. G. Rivas-Estilla A, C髍dova-Fletes C. Overexpression of lnc-ERP44-3:6 Causes Cell Death and Sensitivity to Cisplatin in Breast Cancer Cell Lines. ONCOLOGIE 2021. [DOI: 10.32604/oncologie.2021.017786] [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: 11/15/2022]
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Galan-Huerta KA, Zomosa-Signoret VC, Vidaltamayo R, Caballero-Sosa S, Fernández-Salas I, Ramos-Jiménez J, Rivas-Estilla AM. Genetic Variability of Chikungunya Virus in Southern Mexico. Viruses 2019; 11:v11080714. [PMID: 31387277 PMCID: PMC6722872 DOI: 10.3390/v11080714] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 07/23/2019] [Accepted: 07/23/2019] [Indexed: 11/16/2022] Open
Abstract
Chikungunya virus (CHIKV) is a mosquito-borne alphavirus that causes Chikungunya fever. CHIKV entered Mexico through the state of Chiapas in October 2014. To fully understand the Chikungunya fever outbreak that occurred in southern Chiapas during 2015, we evaluated 22 PCR-confirmed CHIKV-positive patients, identified CHIKV genetic variability, reconstructed viral dispersal, and assessed possible viral mutations. Viruses were isolated and E2, 6K, and E1 genes were sequenced. We applied phylogenetic and phylogeographic approaches, modeled mutations, and estimated selective pressure. Different CHIKV strains circulated in Chiapas during summer 2015. Three isolates grouped themselves in a well-supported clade. Estimates show that the outbreak started in Ciudad Hidalgo and posteriorly dispersed towards Tapachula and neighboring municipalities. We found six non-synonymous mutations in our isolates. Two mutations occurred in one isolate and the remaining mutations occurred in single isolates. Mutations E2 T116I and E2 K221R changed the protein surface in contact with the host cell receptors. We could not find positive selected sites in our CHIKV sequences from southern Chiapas. This is the first viral phylogeographic reconstruction in Mexico characterizing the CHIKV outbreak in southern Chiapas.
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Affiliation(s)
- Kame A Galan-Huerta
- Departamento de Bioquímica y Medicina Molecular, Facultad de Medicina, Universidad Autónoma de Nuevo Leon, Av. Francisco I. Madero S/N, Mitras Centro, Monterrey, Nuevo Leon 64460, Mexico
| | - Viviana C Zomosa-Signoret
- Departamento de Bioquímica y Medicina Molecular, Facultad de Medicina, Universidad Autónoma de Nuevo Leon, Av. Francisco I. Madero S/N, Mitras Centro, Monterrey, Nuevo Leon 64460, Mexico
| | - Román Vidaltamayo
- Departamento de Ciencias Básicas. Escuela de Medicina, Universidad de Monterrey, Av. Morones Prieto No. 4500 pte, San Pedro Garza García, Nuevo Leon 64238, Mexico
| | - Sandra Caballero-Sosa
- Clínica Hospital Dr. Roberto Nettel Flores, Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado, Av. Tuxtepec y Oaxaca S/N, Francisco Villa, Tapachula, Chiapas 30740, Mexico
| | - Ildefonso Fernández-Salas
- Centro Regional de Investigación en Salud Publica, Instituto Nacional de Salud Publica 4a Avenida Norte, esquina con calle 19 poniente S/N, Centro, Tapachula, Chiapas 30700, Mexico
- Facultad de Ciencias Biologicas, Universidad Autonoma de Nuevo Leon, Av. Pedro de Alba S/N, Ciudad Universitaria, San Nicolas de los Garza, Nuevo Leon 66455, Mexico
| | - Javier Ramos-Jiménez
- Servicio de Infectologia-Hospital Universitario Dr. Jose Eleuterio Gonzalez, Facultad de Medicina, Universidad Autonoma de Nuevo Leon, Av. Francisco I. Madero and Eduardo Aguirre Pequeño S/N, Mitras Centro, Monterrey, Nuevo Leon 64460, Mexico
| | - Ana M Rivas-Estilla
- Departamento de Bioquímica y Medicina Molecular, Facultad de Medicina, Universidad Autónoma de Nuevo Leon, Av. Francisco I. Madero S/N, Mitras Centro, Monterrey, Nuevo Leon 64460, Mexico.
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Sánchez-García A, Cabral-Pacheco GA, Zomosa-Signoret VC, Ortiz-López R, Camacho A, Tabera-Tarello PM, Garnica-López JA, Vidaltamayo R. Modular organization of a hypocretin gene minimal promoter. Mol Med Rep 2017; 17:2263-2270. [PMID: 29207107 PMCID: PMC5783473 DOI: 10.3892/mmr.2017.8142] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 10/17/2017] [Indexed: 12/02/2022] Open
Abstract
Orexins or hypocretins are neurotransmitters produced by a small population of neurons in the lateral hypothalamus. This family of peptides modulates sleep-wake cycle, arousal and feeding behaviors; however, the mechanisms regulating their expression remain to be fully elucidated. There is an interest in defining the key molecular elements in orexin regulation, as these may serve to identify targets for generating novel therapies for sleep disorders, obesity and addiction. Our previous studies showed that the expression of orexin was decreased in mice carrying null-mutations of the transcription factor early B-cell factor 2 (ebf2) and that the promoter region of the prepro-orexin (Hcrt) gene contained two putative ebf-binding sites, termed olf-1 sites. In the present study, a minimal promoter region of the murine Hcrt gene was identified, which was able to drive the expression of a luciferase reporter gene in the human 293 cell line. Deletion of the olf1-site proximal to the transcription start site of the Hcrt gene increased reporter gene expression, whereas deletion of the distal olf1-like site decreased its expression. The lentiviral transduction of murine transcription factor ebf2 cDNA into 293 cells increased the gene expression driven by this minimal Hcrt-gene promoter and an electrophoretic mobility shift assays demonstrated that the distal olf1-like sequence was a binding site for ebf2.
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Affiliation(s)
- Adriana Sánchez-García
- Department of Biochemistry and Molecular Medicine, School of Medicine, Universidad Autonoma de Nuevo Leon, Monterrey, NL 64460, Mexico
| | - Griselda A Cabral-Pacheco
- Department of Biochemistry and Molecular Medicine, School of Medicine, Universidad Autonoma de Nuevo Leon, Monterrey, NL 64460, Mexico
| | - Viviana C Zomosa-Signoret
- Department of Biochemistry and Molecular Medicine, School of Medicine, Universidad Autonoma de Nuevo Leon, Monterrey, NL 64460, Mexico
| | - Rocío Ortiz-López
- Genomics Unit, Center for Research and Development in Health Sciences, Universidad Autonoma de Nuevo Leon, Monterrey, NL 64460, Mexico
| | - Alberto Camacho
- Department of Biochemistry and Molecular Medicine, School of Medicine, Universidad Autonoma de Nuevo Leon, Monterrey, NL 64460, Mexico
| | - Paulo M Tabera-Tarello
- Department of Basic Science, School of Health Sciences, Universidad de Monterrey, San Pedro Garzia, NL 66238, Mexico
| | - José A Garnica-López
- Department of Basic Science, School of Health Sciences, Universidad de Monterrey, San Pedro Garzia, NL 66238, Mexico
| | - Román Vidaltamayo
- Department of Basic Science, School of Health Sciences, Universidad de Monterrey, San Pedro Garzia, NL 66238, Mexico
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Sánchez-Fernández A, Peña-Parás L, Vidaltamayo R, Cué-Sampedro R, Mendoza-Martínez A, Zomosa-Signoret VC, Rivas-Estilla AM, Riojas P. Synthesization, Characterization, and in Vitro Evaluation of Cytotoxicity of Biomaterials Based on Halloysite Nanotubes. Materials (Basel) 2014; 7:7770-7780. [PMID: 28788274 PMCID: PMC5456434 DOI: 10.3390/ma7127770] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Revised: 10/16/2014] [Accepted: 11/07/2014] [Indexed: 12/01/2022]
Abstract
Halloysite is an aluminosilicate clay that has been widely used for controlled drug delivery, immobilization of enzymes, and for the capture of circulating tumor cells (CTCs). Surface modification of halloysite by organosilanes has been explored to improve their properties. In this study halloysite clay nanotubes (HNTs) were functionalized by two different organosilanes: Trimethoxy(propyl)silane (TMPS), and Triethoxy(octyl)silane (EOS). Untreated and modified samples were characterized by scanning electron microscopy (SEM), X-ray diffractometry (XRD), thermogravimetrical analysis (TGA), and Fourier transform infrared spectroscopy (FTIR). Results showed a strong interaction of organosilanes with the chemical groups present in HNTs. Biocompatibility and cytotoxicity of these nanomaterials were determined using C6 rat glioblastoma cells. Our results indicate that prior to functionalization, HNTs show a high biocompatibility and low cytotoxicity. However, HNTs functionalized with EOS and TMPS showed high cytotoxicity by inducing apoptosis. These results allow the identification of potential applications in biomedical areas for HNTs.
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Affiliation(s)
- Antonio Sánchez-Fernández
- Instituto Tecnológico de Estudios Superiores de Monterrey, Eugenio Garza Sada 2501, Col. Tecnológico, 64849 Monterrey, NL, Mexico.
| | - Laura Peña-Parás
- Departamento de Ingeniería, Universidad de Monterrey, Ave. Morones Prieto 4500 Pte., Col. Jesús M. Garza, 66238 San Pedro Garza García, NL, Mexico.
| | - Román Vidaltamayo
- Departamento de Ciencias Básicas, Universidad de Monterrey, Ave. Morones Prieto 4500 Pte., Col. Jesús M. Garza, 66238 San Pedro Garza García, NL, Mexico.
| | - Rodrigo Cué-Sampedro
- Instituto Tecnológico de Estudios Superiores de Monterrey, Eugenio Garza Sada 2501, Col. Tecnológico, 64849 Monterrey, NL, Mexico.
| | - Ana Mendoza-Martínez
- Departamento de Ingeniería, Universidad de Monterrey, Ave. Morones Prieto 4500 Pte., Col. Jesús M. Garza, 66238 San Pedro Garza García, NL, Mexico.
| | - Viviana C Zomosa-Signoret
- Departamento de Bioquímica y Medicina Molecular, Facultad de Medicina, Universidad Autónoma de Nuevo León, Jesús Aguirre Pequeño esq. Av. Madero, 64460 Monterrey, NL, Mexico.
| | - Ana M Rivas-Estilla
- Departamento de Bioquímica y Medicina Molecular, Facultad de Medicina, Universidad Autónoma de Nuevo León, Jesús Aguirre Pequeño esq. Av. Madero, 64460 Monterrey, NL, Mexico.
| | - Paulina Riojas
- Departamento de Ingeniería, Universidad de Monterrey, Ave. Morones Prieto 4500 Pte., Col. Jesús M. Garza, 66238 San Pedro Garza García, NL, Mexico.
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