1
|
Monsalve FA, Rojas A, Gonzalez I, Perez R, Añasco C, Romero J, Araya P, Santos LS, Delgado-Lopez F. RID: Evaluation of the Possible Inhibiting Effect of the Proinflammatory Signaling Induced by TNF- α through NF- κβ and AP-1 in Two Cell Lines of Breast Cancer. Mediators Inflamm 2020; 2020:2707635. [PMID: 32655311 PMCID: PMC7327562 DOI: 10.1155/2020/2707635] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 04/16/2020] [Accepted: 05/11/2020] [Indexed: 02/07/2023] Open
Abstract
Receptor internalization and degradation (RID), is a transmembrane protein coded within the E3 region expression cassette of adenoviruses. RID downregulates the cell surface expression of epidermal growth factor receptor (EGFR), tumor necrosis factor receptor (TNFR), and apoptosis antigen 1 (FAS), causing a reduction of the effects of their respective ligands. In addition, RID inhibits apoptosis by decreasing the secretion of TNF-related apoptosis-inducing ligand (TRAIL) by normal tissue cells. In this article, we report that RID inhibited chemokine expression in human breast cancer cell line MDA-MB-231 but showed no effect in cell line MCF7. These dissimilar results may be due to the different molecular and functional properties of both cell lines. Therefore, it is necessary to replicate this study in other breast cancer cell models.
Collapse
Affiliation(s)
- F. A. Monsalve
- 1Department of Basic Biomedical Sciences, Faculty of Health Sciences, University of Talca, Chile
| | - A. Rojas
- 2Laboratories of Biomedical Research, Division of Medicine, Universidad Católica del Maule, Chile
| | - I. Gonzalez
- 2Laboratories of Biomedical Research, Division of Medicine, Universidad Católica del Maule, Chile
| | - R. Perez
- 2Laboratories of Biomedical Research, Division of Medicine, Universidad Católica del Maule, Chile
| | - C. Añasco
- 2Laboratories of Biomedical Research, Division of Medicine, Universidad Católica del Maule, Chile
| | - J. Romero
- 2Laboratories of Biomedical Research, Division of Medicine, Universidad Católica del Maule, Chile
| | - P. Araya
- 2Laboratories of Biomedical Research, Division of Medicine, Universidad Católica del Maule, Chile
| | - L. S. Santos
- 3Laboratory of Asymmetric Synthesis, Institute of Chemistry and Natural Products, University of Talca, Chile
| | - F. Delgado-Lopez
- 2Laboratories of Biomedical Research, Division of Medicine, Universidad Católica del Maule, Chile
| |
Collapse
|
2
|
Rodriguez P, Alvarez I, Torres MT, Diaz J, Bertoglia MP, Carcamo M, Seoane M, Araya P, Russo M, Santolaya ME. Meningococcal carriage prevalence in university students, 1824 years of age in Santiago, Chile. Vaccine 2014; 32:5677-80. [PMID: 25148776 DOI: 10.1016/j.vaccine.2014.08.015] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [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: 02/24/2014] [Revised: 07/29/2014] [Accepted: 08/08/2014] [Indexed: 01/07/2023]
Abstract
INTRODUCTION Neisseria meningitidis invasive disease is a major public health problem. Pharyngeal carriage is considered a prerequisite for invasive infection. Prevalence reaches 10% in general population and up to 30% in the 20-24 years age group. The aim of this study was to asses pharyngeal carriage prevalence in healthy subjects aged 18-24 years, and as secondary endpoints evaluate known risk factors, to identify serogroups and sequence in the isolated strains. METHODS Cross-sectional study in 500 healthy subjects; students from Universidad de Chile aged 18-24 years, Santiago, Chile, October 2012. Each subject underwent a risk factor survey prior to throat culture sampling. Samples were processed in one central Microbiology Laboratory of Hospital Luis Calvo Mackenna and serogrouping and sequencing was performed at Instituto de Salud Pública de Chile. RESULTS We obtained throat samples from 500 healthy subjects, 20 (4%) positive for N. meningitidis. Of positive strains 20% were serogroup B, 15% W and the rest non groupable. The median age was 20 years, 50% were men. Of the risk factors evaluated, 24% were current smokers, 16% shared a room, 72% had kissed someone during the last month, 64% had gone to pub and 76% had consumed alcohol in the same period of time. DISCUSSION Literatures meningococcal carriage prevalence reaches up to 30% in people aged 18-24 years. Prevalence in our study was 4%. Different interpretations could be given; one could be the absence of overcrowding in our students because of the lack of dorms in our scholar system and also the characteristics of our enrolled group. CONCLUSIONS Our results suggest the necessity to extend the study to other age groups and to other cities, to better understand the Chilean reality, as well as others regions of America, considering that these results cannot be extrapolated to another countries.
Collapse
Affiliation(s)
- P Rodriguez
- Pediatrics Infectious Diseases Fellowship, Faculty of Medicine, Universidad de Chile, Santiago, Chile; Division of Infectious Diseases, Pediatrics Department, Hospital Luis Calvo Mackenna, Faculty of Medicine, Universidad de Chile, Santiago, Chile.
| | - I Alvarez
- Microbiology Laboratory, Hospital Luis Calvo Mackenna, Santiago, Chile
| | - M T Torres
- Microbiology Laboratory, Hospital Luis Calvo Mackenna, Santiago, Chile
| | - J Diaz
- Scientific Affairs, Instituto de Salud Pública de Chile, Santiago, Chile
| | - M P Bertoglia
- Biomedical Department, Bacteriology Section, Instituto de Salud Pública de Chile, Santiago, Chile
| | - M Carcamo
- Scientific Affairs, Instituto de Salud Pública de Chile, Santiago, Chile
| | - M Seoane
- Biomedical Department, Bacteriology Section, Instituto de Salud Pública de Chile, Santiago, Chile
| | - P Araya
- Biomedical Department, Bacteriology Section, Instituto de Salud Pública de Chile, Santiago, Chile
| | - M Russo
- Faculty of Medicine, Universidad Diego Portales, Santiago, Chile
| | - M E Santolaya
- Division of Infectious Diseases, Pediatrics Department, Hospital Luis Calvo Mackenna, Faculty of Medicine, Universidad de Chile, Santiago, Chile
| |
Collapse
|
3
|
Campos J, Pichel M, Vaz T, Tavechio A, Fernandes S, Muñoz N, Rodriguez C, Realpe M, Moreno J, Araya P, Fernández J, Fernández A, Campos E, Duarte F, Gustafson NW, Binsztein N, Gutierrez EP. Building PulseNet Latin America and Caribbean Salmonella regional database: First conclusions of genetic subtypes of S. Typhi, S. Typhimurium and S. Enteritidis circulating in six countries of the region. Food Res Int 2012. [DOI: 10.1016/j.foodres.2011.10.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
|
4
|
Abstract
BACKGROUND Orthostatic hypotension (OH) is a rare manifestation of medulla oblongata lesions that may be because of interruption of descending sympathoexcitatory axons. AIMS To illustrate the location of a medullary lesion that produced OH following resection in relationship to the location of putative sympathoexcitatory pathways. METHOD A case with dorsal medullary cavernous angioma presenting with OH is described. The possible localization of lesion was compared with distribution of tyrosine hydroxylase (TH)-immunoreactive axons in a comparable section of the medulla of a control brain. RESULTS The patient had marked OH after partial removal of the cavernous angioma. Biopsy confirmed the diagnosis. The magnetic resonance imaging location of the lesion overlapped that of TH-immunoreactive axons of the medullary transtegmental tract. CONCLUSIONS A restricted lesion of medullary lesion interrupting the catecholaminergic transtegmental tract arising from the sympathoexcitatory C1 neurons of the rostral ventrolateral medulla could result in severe OH.
Collapse
|
5
|
Cáceres C, Yung V, Araya P, Tognarelli J, Villagra E, Vera L, Fernández J. Complete nucleotide sequence analysis of a Dengue-1 virus isolated on Easter Island, Chile. Arch Virol 2008; 153:1967-70. [PMID: 18815724 DOI: 10.1007/s00705-008-0200-0] [Citation(s) in RCA: 8] [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] [Received: 07/21/2008] [Accepted: 09/01/2008] [Indexed: 10/21/2022]
Abstract
Dengue-1 viruses responsible for the dengue fever outbreak in Easter Island in 2002 were isolated from acute-phase sera of dengue fever patients. In order to analyze the complete genome sequence, we designed primers to amplify contiguous segments across the entire sequence of the viral genome. RT-PCR products obtained were cloned, and complete nucleotide and deduced amino acid sequences were determined. This report constitutes the first complete genetic characterization of a DENV-1 isolate from Chile. Phylogenetic analysis shows that an Easter Island isolate is most closely related to Pacific DENV-1 genotype IV viruses.
Collapse
Affiliation(s)
- C Cáceres
- Genética Molecular, Instituto de Salud Pública de Chile, Santiago, Chile
| | | | | | | | | | | | | |
Collapse
|
6
|
|
7
|
Quincoces C, Guerrero S, Araya P, González M. Effect of water vapor over Pd–Co/SZ catalyst for the NO selective reduction by methane. CATAL COMMUN 2005. [DOI: 10.1016/j.catcom.2004.11.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
|
8
|
Hidrobo A, Retuert J, Araya P. MESOPOROUS ALUMINOSILICATE MOLECULAR SIEVE: CONTROL OF TEXTURAL PROPERTIES BY POST-SYNTHESIS HYDROTHERMAL REATMENT. J Chil Chem Soc 2003. [DOI: 10.4067/s0717-97072003000300007] [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] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
9
|
Araya P, Rosemblatt M, Valenzuela P, Murialdo H. The bacteriophage lambda DNA packaging enzyme: identification of four structural domains of the gpNu1 subunit using limited proteolysis. Biol Res 2002; 34:207-16. [PMID: 11715858 DOI: 10.4067/s0716-97602001000300008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Lambda DNA terminase, the enzyme that cleaves virion-length chromosomes from multigenomic concatemers and packages them into the bacteriophage head, is composed of two subunits, gpNu1 and gpA. Direct determination of the structure of gpNu1, the smaller subunit, has not been possible because of its insolubility in aqueous solutions. Therefore, to identify smaller and potentially water-soluble domains of gpNu1, we analyzed the nature of the products obtained by limited digestion of the protein with several proteases. The gpNu1 subunit was obtained from E. coli cells transfected with the plasmid pH6-Nu1 that overproduces the protein. Incubation of gpNu1 solubized in 2.5 M guanidinium chloride with chymotrypsin resulted in the formation of at least eight discrete protein bands, while treatment with endoproteinase glu-C and bromelain yielded three and one major bands, respectively. The peptides generated by digestion with the various proteases were separated by two-dimensional gel electrophoresis and transferred to Immobilon membranes. Amino acid sequencing of the peptides allowed for the precise assignment of their N-terminal amino acid, while their estimated molecular weights permitted the identification of their C-terminal ends. The results reveal that in the presence of 2.5 M guanidinium chloride, gpNu1 is partially folded in at least four distinct structural domains that correspond to functional domains as determined by previously reported genetic experiments. This information is key to design new plasmids to overproduce these domains for further structural analysis.
Collapse
Affiliation(s)
- P Araya
- Fundación Ciencia para la Vida. Av. Marathon 1943, Santiago, Chile
| | | | | | | |
Collapse
|
10
|
Chauveinc L, Flam T, Rosenwald J, Araya P, Thiounn N, Firmin F, Debré B, Cosset J. 41 Iodine 125 brachytherapy for prostate cancer. Experience of the group Curie-Cochin. Radiother Oncol 2001. [DOI: 10.1016/s0167-8140(01)80048-7] [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: 10/25/2022]
|
11
|
Silva-Rosas C, Afini A, Araya P, Fruns M, Guzmán M, Sepúlveda C. 1-01-05 Meningitis in HIV-1 patients. J Neurol Sci 1997. [DOI: 10.1016/s0022-510x(97)84829-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
12
|
Araya P, Fruns M, Silva C, Pedraza L. [Chronic inflammatory demyelinating polyneuropathy. Report of six cases]. Rev Med Chil 1996; 124:1350-8. [PMID: 9293100] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Chronic inflammatory demyelinating polyneuropathy is a heterogeneous disease characterized by symmetrical motor and sensitive alterations, absence of tendon reflexes and increased cerebrospinal fluid protein levels. We report 6 patients with the disease, (three males) aged 41 to 70 years old. Four had the classical presentation and two had an asymmetrical paresis, that predominated in superior limbs. These patients had a proximal block with scarce prolongation of distal nerve conduction velocity. In all patients, underlying illnesses were discarded with a full diagnostic work up. Subjects were followed from 2 to 14 months after the diagnosis. In all, treatment with steroids improved muscle strength and sensitivity.
Collapse
Affiliation(s)
- P Araya
- Departamento de Neurología y Neurocirugía, Hospital Clínico de la U de Chile, Santiago de Chile
| | | | | | | |
Collapse
|
13
|
Araya P, Silva C, Piraino P, Pedraza L, Wegman ME, Fruns M. HLA antigens typification in two Hispanic patients with thyrotoxic periodic paralysis. Muscle Nerve 1996; 19:677-8. [PMID: 8618574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
|
14
|
Pacheco V, Ceresa S, Venegas G, Suárez H, Araya P, Urrizola A. [Purulent pericarditis in childhood. Clinical analysis]. Rev Chil Pediatr 1975; 46:481-5. [PMID: 1235583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|