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  1. Article ; Online: Mass Cytometry in Food Allergy Research.

    Acevedo, Nathalie / Llinás-Caballero, Kevin

    Methods in molecular biology (Clifton, N.J.)

    2023  Volume 2717, Page(s) 207–219

    Abstract: Mechanisms underlying food allergy are not well understood. Mass cytometry is a technique that allows the multiple analysis of cell surface markers and intracellular proteins by using the spectrum of rare metal isotopes of different atomic masses without ...

    Abstract Mechanisms underlying food allergy are not well understood. Mass cytometry is a technique that allows the multiple analysis of cell surface markers and intracellular proteins by using the spectrum of rare metal isotopes of different atomic masses without channel overlap. Bioinformatic approaches are implemented to combine and reduce the information of more than 60 parameters to define immune cell subpopulations. To date, mass cytometry has revealed a great heterogeneity in human response to food antigens and that subpopulations of basophils and mononuclear cells might be mechanistically implicated in food allergy. This chapter reviews some fundamentals of mass cytometry and the contributions of this technique in elucidating the immune basis of food allergy, oral tolerance, food desensitization, phenotypes, and the cellular events occurring upon allergen-specific immunotherapy.
    MeSH term(s) Humans ; Food Hypersensitivity ; Food ; Basophils ; Computational Biology ; Desensitization, Immunologic
    Language English
    Publishing date 2023-09-22
    Publishing country United States
    Document type Journal Article
    ISSN 1940-6029
    ISSN (online) 1940-6029
    DOI 10.1007/978-1-0716-3453-0_13
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Inmunofenotipo por citometría espectral, revela un perfil de linfopenia asociado a desregulación con aumento de linfocitos de memoria efectora en paciente con mutación en el gen ITPR3.

    Muñoz, César / de Vivero, María Mónica / Acevedo, Nathalie

    Revista alergia Mexico (Tecamachalco, Puebla, Mexico : 1993)

    2024  Volume 71, Issue 1, Page(s) 59

    Abstract: Background: Variants in intracellular calcium transport genes have been associated with syndromic immunodeficiencies with a SCID phenotype.: Case report: Seven-year-old girl of non-consanguineous parents, in Cartagena-Colombia. At two months of age, ... ...

    Title translation Immunophenotyping by spectral cytometry reveals a profile of lymphopenia associated with deregulation with an increase in effector memory lymphocytes in a patient with a mutation in the ITPR3 gene.
    Abstract Background: Variants in intracellular calcium transport genes have been associated with syndromic immunodeficiencies with a SCID phenotype.
    Case report: Seven-year-old girl of non-consanguineous parents, in Cartagena-Colombia. At two months of age, he presented hematochezia and was diagnosed with alimentary proctolitis without improvement with restriction to milk, wheat and eggs, and malnutrition developed. At eight months, a colon biopsy shows chronic lymphoid hyperplasia, presenting with anemia, eosinophilia, but total and specific IgE to normal foods. After four years, the Immunology Service found her asymptomatic, nutritionally recovered and without allergic sensitization, but eosinophilia and elevated calprotectin persisted, suggesting an early-onset inflammatory bowel disease. Immunoglobulins were normal, lymphocyte populations with CD3, CD4 and CD8 lymphopenia. At six years old, she presented atopic dermatitis, still had elevated calprotectin and was lymphopenic. Immunophenotyping by spectral cytometry using Cytek
    Conclusions: The clinical features and immunophenotype of this candidate variant differ from others related to intracellular calcium transport. They are functional studies necessary to validate their causality. A patient with a potentially deleted variant presents an immunophenotype with CD3 lymphopenia and persistent lymphocyte activation.
    MeSH term(s) Humans ; Female ; Child ; Lymphopenia/genetics ; Lymphopenia/etiology ; Immunophenotyping ; Inositol 1,4,5-Trisphosphate Receptors/genetics ; Mutation ; Flow Cytometry ; Memory T Cells/immunology
    Chemical Substances Inositol 1,4,5-Trisphosphate Receptors ; ITPR3 protein, human
    Language Spanish
    Publishing date 2024-02-01
    Publishing country Mexico
    Document type Case Reports ; Journal Article ; English Abstract
    ZDB-ID 639125-4
    ISSN 2448-9190 ; 0002-5151
    ISSN (online) 2448-9190
    ISSN 0002-5151
    DOI 10.29262/ram.v71i1.1361
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Are the Terms Major and Minor Allergens Useful for Precision Allergology?

    Caraballo, Luis / Valenta, Rudolf / Acevedo, Nathalie / Zakzuk, Josefina

    Frontiers in immunology

    2021  Volume 12, Page(s) 651500

    MeSH term(s) Allergens/adverse effects ; Allergens/metabolism ; Allergy and Immunology ; Animals ; Asthma/blood ; Asthma/genetics ; Asthma/immunology ; Asthma/therapy ; Dermatophagoides pteronyssinus/immunology ; Humans ; Immunoglobulin E/blood ; Immunoglobulin E/metabolism ; Precision Medicine/methods ; Protein Binding/immunology ; Rhinitis, Allergic/blood ; Rhinitis, Allergic/genetics ; Rhinitis, Allergic/immunology ; Rhinitis, Allergic/therapy ; Terminology as Topic
    Chemical Substances Allergens ; Immunoglobulin E (37341-29-0)
    Language English
    Publishing date 2021-03-08
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2606827-8
    ISSN 1664-3224 ; 1664-3224
    ISSN (online) 1664-3224
    ISSN 1664-3224
    DOI 10.3389/fimmu.2021.651500
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Understanding the Cellular Sources of the Fractional Exhaled Nitric Oxide (FeNO) and Its Role as a Biomarker of Type 2 Inflammation in Asthma.

    Escamilla-Gil, Jose M / Fernandez-Nieto, Mar / Acevedo, Nathalie

    BioMed research international

    2022  Volume 2022, Page(s) 5753524

    Abstract: Fractional exhaled nitric oxide (FeNO) has gained great clinical importance as a biomarker of type 2 inflammation in chronic airway diseases such as asthma. FeNO originates primarily in the bronchial epithelium and is produced in large quantities by the ... ...

    Abstract Fractional exhaled nitric oxide (FeNO) has gained great clinical importance as a biomarker of type 2 inflammation in chronic airway diseases such as asthma. FeNO originates primarily in the bronchial epithelium and is produced in large quantities by the enzyme inducible nitric oxide synthase (iNOS). It should be noted that nitric oxide (NO) produced at femtomolar to picomolar levels is fundamental for respiratory physiology. This basal production is induced in the bronchial epithelium by interferon gamma (IFN
    MeSH term(s) Asthma/drug therapy ; Biomarkers/metabolism ; Breath Tests ; Exhalation ; Fractional Exhaled Nitric Oxide Testing ; Humans ; Inflammation ; Nitric Oxide/metabolism
    Chemical Substances Biomarkers ; Nitric Oxide (31C4KY9ESH)
    Language English
    Publishing date 2022-05-02
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 2698540-8
    ISSN 2314-6141 ; 2314-6133
    ISSN (online) 2314-6141
    ISSN 2314-6133
    DOI 10.1155/2022/5753524
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Cystatin from the helminth

    Acevedo, Nathalie / Lozano, Ana / Zakzuk, Josefina / Llinás-Caballero, Kevin / Brodin, David / Nejsum, Peter / Williams, Andrew R / Caraballo, Luis

    Frontiers in immunology

    2024  Volume 15, Page(s) 1328401

    Abstract: Background: Ascaris lumbricoides: Methods: moDC were generated from peripheral blood monocytes from six healthy human donors of Denmark, stimulated with 1 µM of Al-CPI, and cultured for 5 hours at 37°C. RNA was sequenced using TrueSeq RNA libraries ... ...

    Abstract Background: Ascaris lumbricoides
    Methods: moDC were generated from peripheral blood monocytes from six healthy human donors of Denmark, stimulated with 1 µM of Al-CPI, and cultured for 5 hours at 37°C. RNA was sequenced using TrueSeq RNA libraries and the NextSeq 550 v2.5 (75 cycles) sequencing kit (Illumina, Inc). After QC, reads were aligned to the human GRCh38 genome using Spliced Transcripts Alignment to a Reference (STAR) software. Differential expression was calculated by DESEq2 and expressed in fold changes (FC). Cell surface markers and cytokine production by moDC were evaluated by flow cytometry.
    Results: Compared to unstimulated cells, Al-CPI stimulated moDC showed differential expression of 444 transcripts (|FC| ≥1.3). The top significant differences were in Kruppel-like factor 10 (
    Conclusion: Al-CPI modifies the transcriptome of moDC, increasing several transcripts encoding enzymes involved in cholesterol biosynthesis and SREBP signaling. Moreover, Al-CPI target several transcripts in the TNF-alpha signaling pathway influencing cytokine release by moDC. In addition, mRNA levels of genes encoding
    MeSH term(s) Humans ; Animals ; Mice ; Monocytes ; Ascaris lumbricoides ; Mevalonic Acid/metabolism ; Sterol Regulatory Element Binding Protein 1/metabolism ; Cell Differentiation ; Cytokines/metabolism ; Cystatins ; Inflammation/metabolism ; Immunity ; Dendritic Cells ; RNA/metabolism
    Chemical Substances Mevalonic Acid (S5UOB36OCZ) ; Sterol Regulatory Element Binding Protein 1 ; Cytokines ; Cystatins ; RNA (63231-63-0)
    Language English
    Publishing date 2024-02-28
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2606827-8
    ISSN 1664-3224 ; 1664-3224
    ISSN (online) 1664-3224
    ISSN 1664-3224
    DOI 10.3389/fimmu.2024.1328401
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Caracterización de fenotipos de asma en niños del trópico.

    Guzmán, María Camila / de Vivero, María / Gil, Isabel / Marrugo, Victoria / Mercado, Dilia / Zakzuk, Josefina / Puerta, Leonardo / Acevedo, Nathalie / Caraballo, Luis

    Revista alergia Mexico (Tecamachalco, Puebla, Mexico : 1993)

    2024  Volume 71, Issue 1, Page(s) 74

    Abstract: Objective: Determine the main asthma phenotypes in a population of asthmatic children in Cartagena, Colombia.: Methods: 107 children (7 to 17 years old) with a previous diagnosis of asthma were recruited. Biomarkers of T2 inflammation were evaluated ... ...

    Title translation Characterization of asthma phenotypes in children of the tropics.
    Abstract Objective: Determine the main asthma phenotypes in a population of asthmatic children in Cartagena, Colombia.
    Methods: 107 children (7 to 17 years old) with a previous diagnosis of asthma were recruited. Biomarkers of T2 inflammation were evaluated by measuring FeNO, eosinophil count in peripheral blood by hemocytometry, and determination of specific IgE to mite allergens by ELISA. The study was approved by the ethics committee of the University of Cartagena (SGR, Grant BPIN2020000100405).
    Results: The average age of patients was 10,9 years. 19,6% of the children did not show elevation of any of the T2 inflammation biomarkers evaluated (FeNO<20ppb, eos<300/ul, negative specific IgE), so they were considered patients with non-allergic asthma (non-T2). 71,9% of all patients were sensitized to at least one allergen, this phenotype was considered allergic asthma. 30,8% of the patients presented the three elevated biomarkers (FeNO>20ppb + eos >300/ul + positive specific IgE), this phenotype was classified as high T2 allergic asthma. A moderate correlation (Spearman rho=0,44, p<0,0001) was found between FeNO values and eosinophil counts.
    Conclusion: In this study, the following phenotypes were found: allergic asthma, high T2 asthma, and non-allergic asthma. Most patients presented a type 2 inflammatory phenotype with allergic sensitization. In addition to the measurement of specific IgE, the use of FeNO and eosinophil count in peripheral blood help to accurately determine those patients with high T2 asthma phenotypes.
    MeSH term(s) Humans ; Asthma/blood ; Child ; Phenotype ; Adolescent ; Male ; Female ; Immunoglobulin E/blood ; Eosinophils ; Tropical Climate ; Biomarkers/blood ; Colombia ; Leukocyte Count
    Chemical Substances Immunoglobulin E (37341-29-0) ; Biomarkers
    Language Spanish
    Publishing date 2024-02-01
    Publishing country Mexico
    Document type English Abstract ; Journal Article
    ZDB-ID 639125-4
    ISSN 2448-9190 ; 0002-5151
    ISSN (online) 2448-9190
    ISSN 0002-5151
    DOI 10.29262/ram.v71i1.1362
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Caracterización de poblaciones celulares en sangre periférica, con relación a la infección por

    Lozano, Ana / Marrugo, Victoria / Alvarado, Juan Carlos / Hernandez, Karen / Caballero, Kevin Llinás / Acevedo, Nathalie / Zakzuk, Josefina / Caraballo, Luis

    Revista alergia Mexico (Tecamachalco, Puebla, Mexico : 1993)

    2024  Volume 71, Issue 1, Page(s) 69

    Abstract: Objective: To compare the relative frequencies of immune cell populations in the peripheral blood according to : Methods: Peripheral blood samples were collected from participants infected (n = 35) and uninfected with : Results: No significant ... ...

    Title translation Characterization of peripheral blood cellular populations in relation to Ascaris Lumbricoides infection in rural areas of Bolívar.
    Abstract Objective: To compare the relative frequencies of immune cell populations in the peripheral blood according to
    Methods: Peripheral blood samples were collected from participants infected (n = 35) and uninfected with
    Results: No significant differences were observed in age [mean cases: 35.69 (SD: 17.7) vs. controls: 37.04 (SD: 15.6) years] or sex (cases: 62.9% vs. controls: 74.1%) (Table 1). All infections were mild, with a median of 96 eggs (IQR, 48-216). A marginally significant difference was observed only in the percentage of neutrophils (45.37% in cases vs. 54.79% in controls, p=0.041) (Figure 3). Although the frequency of eosinophils was higher in the cases (8.1% vs. 6%), this difference was not significant (p=0.138) (Figure 3). No significant differences were observed in the populations of monocytes or dendritic cells between cases and controls (Figure 4).
    Conclusion: Mild
    MeSH term(s) Humans ; Male ; Female ; Ascariasis/immunology ; Ascariasis/epidemiology ; Adult ; Adolescent ; Animals ; Young Adult ; Rural Health ; Child ; Ascaris lumbricoides ; Middle Aged ; Colombia
    Language Spanish
    Publishing date 2024-02-01
    Publishing country Mexico
    Document type English Abstract ; Journal Article
    ZDB-ID 639125-4
    ISSN 2448-9190 ; 0002-5151
    ISSN (online) 2448-9190
    ISSN 0002-5151
    DOI 10.29262/ram.v71i1.1372
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Determinación de poblaciones circulantes en sangre periférica de linfocitos T, reguladores CD4

    Barrios-Angulo, Carlos E / de Vivero, María Mónica / Reina-Rivero, Randy / Guzmán, María Camila / Caballero, Miguel Ángel / Acevedo, Nathalie

    Revista alergia Mexico (Tecamachalco, Puebla, Mexico : 1993)

    2024  Volume 71, Issue 1, Page(s) 73

    Abstract: Objective: To carry out a preliminary analysis on the Treg lymphocyte counts present in the peripheral blood of allergic asthmatic children from the city of Cartagena, Colombia, compared to healthy controls.: Methods: We compared cytometry counts of ... ...

    Title translation Circulating populations of CD4+ CD25+ CD127- regulatory t lymphocytes in peripheral blood of allergic asthmatic children.
    Abstract Objective: To carry out a preliminary analysis on the Treg lymphocyte counts present in the peripheral blood of allergic asthmatic children from the city of Cartagena, Colombia, compared to healthy controls.
    Methods: We compared cytometry counts of ten asthmatic patients (age 7-16 years) and seven healthy controls (6-12 years), recruited in the city of Cartagena. Peripheral blood samples were stained using Cytek's 14-color cFluor Immunoprofiling kit (Cytek
    Results: The frequency of CD3+, CD4+, CD25+, CD127- Tregs was 11% of all CD4+ T cells, with a range of minimum 8,1% and maximum 17,7%. There was no significant difference in the proportion of Tregs between allergic asthmatic patients and healthy controls (P = 0,2).
    Conclusions: With this preliminary sample size, no significant differences were found in the Treg lymphocyte population between allergic asthmatic patients and healthy controls. The 14-color multiplexed panel is a useful tool not only to count CD3+ and CD4+ populations, but also to obtain the percentage of regulatory T cells using cell surface markers.
    MeSH term(s) Humans ; Child ; Asthma/blood ; Asthma/immunology ; T-Lymphocytes, Regulatory/immunology ; Adolescent ; Male ; Female ; Interleukin-2 Receptor alpha Subunit/blood ; Interleukin-2 Receptor alpha Subunit/analysis ; Interleukin-7 Receptor alpha Subunit/analysis ; Interleukin-7 Receptor alpha Subunit/blood ; CD4 Antigens/analysis ; CD4 Antigens/blood ; Lymphocyte Count
    Chemical Substances Interleukin-2 Receptor alpha Subunit ; Interleukin-7 Receptor alpha Subunit ; CD4 Antigens
    Language Spanish
    Publishing date 2024-02-01
    Publishing country Mexico
    Document type English Abstract ; Journal Article
    ZDB-ID 639125-4
    ISSN 2448-9190 ; 0002-5151
    ISSN (online) 2448-9190
    ISSN 0002-5151
    DOI 10.29262/ram.v71i1.1363
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Medición de citoquinas mediante una técnica multiplex por citometría espectral: aplicación en el estudio de la inmunobiología de la ascariasis.

    Lozano, Ana / Sánchez-Marrugo, Carolina / Llinás-Caballero, Kevin / Barrios, Carlos / Acevedo, Nathalie / Zakzuk, Josefina / Caraballo, Luis

    Revista alergia Mexico (Tecamachalco, Puebla, Mexico : 1993)

    2024  Volume 71, Issue 1, Page(s) 64–65

    Abstract: Objective: To quantify the production of Th1/Th2/Th17 cytokines induced by Ascaris lumbricoides antigens in peripheral blood mononuclear cells (PBMCs) using a multiplex technique.: Methods: PBMCs were cultured from individuals with mild A. ... ...

    Title translation Cytokine measurement using a multiplex technique with spectral flow cytometry: application in the study of the immunobiology of ascariasis.
    Abstract Objective: To quantify the production of Th1/Th2/Th17 cytokines induced by Ascaris lumbricoides antigens in peripheral blood mononuclear cells (PBMCs) using a multiplex technique.
    Methods: PBMCs were cultured from individuals with mild A. lumbricoides infection (n = 20) and uninfected individuals (n = 21) and stimulated with A. lumbricoides extract (ExtAscaris), a mix of anti-CD2/CD3/CD28 (CDmix) as a positive control, and only medium (negative control). Cytokines in the supernatants were measured using the BD™ Cytometric Bead Array Human Th1/Th2/Th17 kit, to identify IFN-γ, TNF, IL-10, IL-6, IL-4, IL-2, and IL-17A. Readings were taken on a spectral cytometer (Northern Lights, Cytek, USA), and analysis was performed using R software with packages "tidyverse," "beadplexr," "flowCore," and "arsenal." Cytokine concentrations were calculated using a 5-parameter logistic curve. The t-test was used to compare cases and controls, and statistical significance was set at p < 0.05. The study was approved by the Ethics Committee of the University of Cartagena and the participants provided informed consent. This study was financially supported by the Colombian Sistema General de Regalías under the BPIN2020000100405 - BPIN2020000100364.
    Results: Efficient fluorescence intensity extraction for each cytokine was achieved using detection channel R8 and the "mclust" clustering model (Figure 1). No significant differences were found in the levels of the seven cytokines between cases and controls (Figure 2). Although the IFN-γ response to ExtAscaris was higher in cases than in controls (252.5 ng/mL vs. 173.1 ng/mL), the difference was not significant. IL-17A (detection limit: 18.9 pg/mL) was more detectable in cases than controls (5 cases, 23% vs. 2 controls, 9.5%). IL-4 was only detected in the supernatants from CDmix-stimulated cultures but not with the Ascaris extract (Figure 2).
    Conclusions: The multiplex technique using spectral flow cytometry combined with open-source
    MeSH term(s) Humans ; Cytokines/blood ; Flow Cytometry/methods ; Ascariasis/immunology ; Ascariasis/diagnosis ; Male ; Female ; Adult ; Animals ; Leukocytes, Mononuclear/immunology ; Ascaris lumbricoides/immunology ; Young Adult ; Middle Aged ; Adolescent ; Antigens, Helminth/immunology
    Chemical Substances Cytokines ; Antigens, Helminth
    Language Spanish
    Publishing date 2024-02-01
    Publishing country Mexico
    Document type English Abstract ; Journal Article
    ZDB-ID 639125-4
    ISSN 2448-9190 ; 0002-5151
    ISSN (online) 2448-9190
    ISSN 0002-5151
    DOI 10.29262/ram.v71i1.1365
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Are the Terms Major and Minor Allergens Useful for Precision Allergology?

    Luis Caraballo / Rudolf Valenta / Nathalie Acevedo / Josefina Zakzuk

    Frontiers in Immunology, Vol

    2021  Volume 12

    Keywords allergen ; major and minor ; immunoglobulin E ; asthma ; specific immunoglobulin E ; precision medicine ; Immunologic diseases. Allergy ; RC581-607
    Language English
    Publishing date 2021-03-01T00:00:00Z
    Publisher Frontiers Media S.A.
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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