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  1. Article ; Online: Strategies to recover blood donors during the COVID-19 pandemic: a tertiary level hospital experience.

    Peña-Carillo, Hebert I / Rosa-Zamboni, Daniela de la / López-Victoria, Alicia B / López-Martínez, Briceida / Guerrero-Díaz, Ana C

    Boletin medico del Hospital Infantil de Mexico

    2022  Volume 79, Issue 5, Page(s) 300–309

    Abstract: Background: The SARS-CoV-2 pandemic has challenged blood banks. In Mexico, donors decreased 22% between April and May 2020 compared to the same months in 2019. This study analyzed the effect of the strategies to recover donors (altruistic and family) in ...

    Title translation Estrategias para recuperar donantes de sangre durante la pandemia por COVID-19: experiencia de un hospital de tercer nivel.
    Abstract Background: The SARS-CoV-2 pandemic has challenged blood banks. In Mexico, donors decreased 22% between April and May 2020 compared to the same months in 2019. This study analyzed the effect of the strategies to recover donors (altruistic and family) in a tertiary pediatric care center during the pandemic.
    Methods: The Blood Bank of the Hospital Infantil de México Federico Gómez implemented strategies to obtain blood components to ensure self-sufficiency. The effect of these strategies on donor recovery was analyzed.
    Results: There were 7,315 eligible donors in 2019 and 5,070 in 2020. Blood component requirements decreased from 10,037 units in 2019 to 8,619 in 2020. The strategies aimed at attracting altruistic donors managed to increase the percentage of this type of donor when comparing the months in which these strategies were applied with the same months in 2019. In addition, it was observed that the greater the number of methods used simultaneously, the higher the percentage of altruistic donors (rho = 0.846, p = 0.002). In contrast, strategies aimed at attracting family donors did not increase the number of this type of donor.
    Conclusions: Actions to recruit altruistic donors increased the number of this type of donor to meet the hospital's needs.
    MeSH term(s) Humans ; Child ; COVID-19/epidemiology ; SARS-CoV-2 ; Pandemics ; Blood Donors ; Tertiary Care Centers
    Language English
    Publishing date 2022-10-20
    Publishing country Mexico
    Document type Journal Article
    ZDB-ID 730519-9
    ISSN 1665-1146 ; 1665-1146 ; 0539-6115 ; 0539-6123
    ISSN (online) 1665-1146
    ISSN 1665-1146 ; 0539-6115 ; 0539-6123
    DOI 10.24875/BMHIM.21000237
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Analytical recommendations for SARS-CoV-2 identification by RT-PCR in pediatric patients.

    Parra-Ortega, Israel / Vilchis-Ordoñez, Armando / López-Martínez, Briceida / Angeles-Floriano, Tania

    Boletin medico del Hospital Infantil de Mexico

    2021  Volume 78, Issue 3, Page(s) 171–180

    Abstract: Coronavirus disease 2019 (COVID-19) is caused by the severe acute respiratory syndrome 2 coronavirus (SARS-CoV-2) and is currently listed as a global public health emergency. Timely identification and protocol implementations for molecular detection of ... ...

    Abstract Coronavirus disease 2019 (COVID-19) is caused by the severe acute respiratory syndrome 2 coronavirus (SARS-CoV-2) and is currently listed as a global public health emergency. Timely identification and protocol implementations for molecular detection of this virus are vital for medical decision-making. Identification of SARS-CoV-2 infection cases is based on detection of the virus RNA by molecular tests, particularly real-time reverse transcription-polymerase chain reaction (RT-PCR). Technical and operational details specific to each center must be considered to perform the molecular diagnosis of SARS-CoV-2 in pediatric patients. The term "qualified laboratories" involves laboratories in which all users, analysts, and anyone reporting results are trained to develop and interpret results through a procedure implemented previously by an instructor. Such knowledge is essential in detecting and identifying errors during each of its phases: pre-analytical, analytical, and post-analytical, which allow the establishment of continuous improvement policies to ensure the quality of the results, but above all, the physical integrity of health workers.
    MeSH term(s) COVID-19/diagnosis ; COVID-19 Nucleic Acid Testing/methods ; COVID-19 Testing/methods ; Child ; Humans ; RNA, Viral/isolation & purification ; SARS-CoV-2/genetics
    Chemical Substances RNA, Viral
    Language English
    Publishing date 2021-05-03
    Publishing country Mexico
    Document type Journal Article
    ZDB-ID 730519-9
    ISSN 1665-1146 ; 1665-1146 ; 0539-6115 ; 0539-6123
    ISSN (online) 1665-1146
    ISSN 1665-1146 ; 0539-6115 ; 0539-6123
    DOI 10.24875/BMHIM.20000210
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Enrichment of effector memory T cells in the CD4 and CD8 T cell compartment during chronic graft versus host disease in children.

    Parra-Ortega, Israel / Nájera-Martínez, Noemí / Gaytán-Morales, Félix / Castorena-Villa, Iván / López-Martínez, Briceida / Ortiz-Navarrete, Vianney / Olvera-Gómez, Irlanda

    Transplant immunology

    2023  Volume 81, Page(s) 101951

    Abstract: Background: During allogeneic Hematopoietic stem cell transplantation (HSCT), frequent pathological scenarios include graft versus host disease (GVHD) and viral infections. We hypothesized if exogenous stimulus as alloantigen and viral antigens might ... ...

    Abstract Background: During allogeneic Hematopoietic stem cell transplantation (HSCT), frequent pathological scenarios include graft versus host disease (GVHD) and viral infections. We hypothesized if exogenous stimulus as alloantigen and viral antigens might impact on central and effector memory T cells in pediatric recipients.
    Patients and methods: Subjects included 21 pediatric recipients and 20 healthy children (control group). Peripheral blood samples of patients were collected along the first 712 days post-HSCT. T cell phenotyping of naïve, central, and effector memory T cells (TCMs and TEMs, respectively) was conducted using flow cytometry. Viral nucleic acids were detected using real-time PCR.
    Results: T cell reconstitution was not reached after 1 year post-HSCT. Chronic GVHD was associated with increased numbers of naïve CD4 T cells (p < 0.05) as well as an increase in TEM and TCM cells of the CD4 (p < 0.0001 and p < 0.05, respectively) and CD8 T cell TEM (p < 0.0001). and TCM (p < 0.001) populations too. Moreover, BK and Epstein-Barr viruses were the main viral pathogens detected (<10
    Conclusion: During chronic GVHD, alloantigen persistence generates TEM cell enrichment among CD4 and CD8 T cells, and viral infections are associated with deficient recovery of T cells after HSCT.
    MeSH term(s) Humans ; Child ; Bronchiolitis Obliterans Syndrome ; Memory T Cells ; CD8-Positive T-Lymphocytes ; Graft vs Host Disease ; Virus Diseases ; Isoantigens ; Hematopoietic Stem Cell Transplantation
    Chemical Substances Isoantigens
    Language English
    Publishing date 2023-11-07
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1160846-8
    ISSN 1878-5492 ; 0966-3274
    ISSN (online) 1878-5492
    ISSN 0966-3274
    DOI 10.1016/j.trim.2023.101951
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Analytical recommendations for SARS-CoV-2 identification by RT-PCR in pediatric patients

    Israel Parra-Ortega / Armando Vilchis-Ordoñez / Briceida López-Martínez / Tania Ángeles-Floriano

    Boletín Médico del Hospital Infantil de México, Vol 78, Iss

    2021  Volume 3

    Abstract: Coronavirus disease 2019 (COVID-19) is caused by the severe acute respiratory syndrome 2 coronavirus (SARS-CoV-2) and is currently listed as a global public health emergency. Timely identification and protocol implementations for molecular detection of ... ...

    Abstract Coronavirus disease 2019 (COVID-19) is caused by the severe acute respiratory syndrome 2 coronavirus (SARS-CoV-2) and is currently listed as a global public health emergency. Timely identification and protocol implementations for molecular detection of this virus are vital for medical decision-making. Identification of SARS-CoV-2 infection cases is based on detection of the virus RNA by molecular tests, particularly real-time reverse transcription-polymerase chain reaction (RT-PCR). Technical and operational details specific to each center must be considered to perform the molecular diagnosis of SARS-CoV-2 in pediatric patients. The term “qualified laboratories” involves laboratories in which all users, analysts, and anyone reporting results are trained to develop and interpret results through a procedure implemented previously by an instructor. Such knowledge is essential in detecting and identifying errors during each of its phases: pre-analytical, analytical, and post-analytical, which allow the establishment of continuous improvement policies to ensure the quality of the results, but above all, the physical integrity of health workers.
    Keywords COVID-19. SARS-CoV-2. RT-PCR ; Pediatrics ; RJ1-570 ; Public aspects of medicine ; RA1-1270
    Language English
    Publishing date 2021-07-01T00:00:00Z
    Publisher Permanyer
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article: Efficacy and safety of vitamin D supplementation in hospitalized COVID-19 pediatric patients: A randomized controlled trial.

    Zurita-Cruz, Jessie / Fonseca-Tenorio, Jeffry / Villasís-Keever, Miguel / López-Alarcón, Mardia / Parra-Ortega, Israel / López-Martínez, Briceida / Miranda-Novales, Guadalupe

    Frontiers in pediatrics

    2022  Volume 10, Page(s) 943529

    Abstract: Background: Some studies suggested that adequate levels of vitamin D (VD) decrease the risk of severe COVID-19. Information about the effectiveness of VD supplementation in children is scarce.: Objective: To assess the efficacy and safety of VD ... ...

    Abstract Background: Some studies suggested that adequate levels of vitamin D (VD) decrease the risk of severe COVID-19. Information about the effectiveness of VD supplementation in children is scarce.
    Objective: To assess the efficacy and safety of VD supplementation compared to the standard of care in hospitalized children with COVID-19.
    Patients and methods: An open-label randomized controlled single-blind clinical trial was carried out. We included patients from 1 month to 17 years, with moderate COVID-19, who required hospitalization and supplemental oxygen. They were randomized into two groups: the VD group, which received doses of 1,000 (children < 1 year) or 2,000 IU/day (from 1 to 17 years) and the group without VD (control). The outcome variables were the progression of oxygen requirement, the development of complications, and death.
    Statistical analysis: For comparison between groups, we used the chi-squared test or Fisher's exact test and the Mann-Whitney
    Results: From 24 March 2020 to 31 March 2021, 87 patients were eligible to participate in the trial; 45 patients were randomized: 20 to the VD group and 25 to the control group. There was no difference in general characteristics at baseline, including serum VD levels (median 13.8 ng/ml in the VD group and 11.4 ng/ml in the control group).
    Outcomes: 2/20 (10%) in the VD group vs. 9/25 (36%) in the control group progressed to a superior ventilation modality (
    Conclusion: In this trial, VD supplementation in pediatric patients seems to decrease the risk of COVID-19 progression and death. More studies are needed to confirm these findings.
    Clinical trial registration: This protocol was registered on ClinicalTrials.gov with the registration number NCT04502667.
    Language English
    Publishing date 2022-07-25
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2711999-3
    ISSN 2296-2360
    ISSN 2296-2360
    DOI 10.3389/fped.2022.943529
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: miRNAs in multiple sclerosis: A clinical approach.

    Minutti-Zanella, Claudia / Bojalil-Álvarez, Lorena / García-Villaseñor, Elizabeth / López-Martínez, Briceida / Pérez-Turrent, Manuel / Murrieta-Álvarez, Iván / Ruiz-Delgado, Guillermo J / Argüelles, Guillermo J Ruiz

    Multiple sclerosis and related disorders

    2022  Volume 63, Page(s) 103835

    Abstract: Micro-RNAs (miRNAs) are noncoding, single stranded segments of RNA measuring 19 to 25 nucleotides in length. They play an active role in autoimmune diseases, including multiple sclerosis (MS). These structures have been studied given their implication in ...

    Abstract Micro-RNAs (miRNAs) are noncoding, single stranded segments of RNA measuring 19 to 25 nucleotides in length. They play an active role in autoimmune diseases, including multiple sclerosis (MS). These structures have been studied given their implication in the process of diagnosis, disease development, treatment and prognosis of MS. Given the progressive and neurodegenerative nature of MS, miRNAs have been identified as critical mediators and molecular pinpoints of the disease, which poses them as excellent candidates for the obtention of suitable biomarkers and treatment targets. This review condenses recent findings on the role of miRNAs in multiple sclerosis, including their role in MS etiology and molecular mechanisms of the disease, exploitation of miRNAs as diagnostic tools and biomarkers, miRNAs as treatment option or target for MS, and their significance as predictors of disease prognosis.
    MeSH term(s) Autoimmune Diseases ; Biomarkers ; Humans ; MicroRNAs/genetics ; Multiple Sclerosis/diagnosis ; Multiple Sclerosis/genetics ; Multiple Sclerosis/therapy
    Chemical Substances Biomarkers ; MicroRNAs
    Language English
    Publishing date 2022-04-30
    Publishing country Netherlands
    Document type Journal Article ; Review
    ZDB-ID 2645330-7
    ISSN 2211-0356 ; 2211-0348
    ISSN (online) 2211-0356
    ISSN 2211-0348
    DOI 10.1016/j.msard.2022.103835
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Presence of antibodies against HLA class I and class II molecules in children before and after allo-HSCT. Alloantibodies before and after HSCT.

    Morán-Espinosa, Maricarmen / Angeles-Floriano, Tania / Parra-Ortega, Israel / Gaytán-Morales, Félix / Castorena-Villa, Iván / López-Martínez, Briceida / Ortiz-Navarrete, Vianney / Olvera-Gómez, Irlanda

    HLA

    2022  Volume 101, Issue 1, Page(s) 16–23

    Abstract: A severe complication of allogeneic hematopoietic stem cell transplantation (HSCT) is graft failure (GF). Among others, donor-specific anti-HLA antibodies (DSA) are associated with graft rejection after allogeneic or haploidentical transplantation in ... ...

    Abstract A severe complication of allogeneic hematopoietic stem cell transplantation (HSCT) is graft failure (GF). Among others, donor-specific anti-HLA antibodies (DSA) are associated with graft rejection after allogeneic or haploidentical transplantation in adults. Knowledge of DSA and pediatric recipients is limited. Hence, we aimed to generate more information about the presence of DSA (pre- and post-HSCT) and the clinical outcomes (graft rejection and poor function) in children. We identified DSA in 27% of the patients. We observed a higher frequency (50%) of DSA-bearing patients with a benign disease diagnosis than those diagnosed with leukemia (16.66%). We observed graft rejection in one patient (with DSA against two alleles of HLA class I molecules) and poor function in three recipients during the first 30 days after HSCT in the absence of DSA. The presence of donor and nondonor HLA-specific antibodies decreased substantially after transplantation. After the transplant, we identified two patients with DSA specific for HLA class I molecules (independent of clinical relevance), and four recipients showed PGF in the absence of DSA. We were unable to establish any association between the presence of DSA and a clinical outcome: graft failure or prevalence of viral infection.
    MeSH term(s) Child ; Humans ; Alleles ; Hematopoietic Stem Cell Transplantation ; Isoantibodies ; Histocompatibility Antigens Class I ; Histocompatibility Antigens Class II
    Chemical Substances Isoantibodies ; Histocompatibility Antigens Class I ; Histocompatibility Antigens Class II
    Language English
    Publishing date 2022-10-13
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2845111-9
    ISSN 2059-2310 ; 2059-2302
    ISSN (online) 2059-2310
    ISSN 2059-2302
    DOI 10.1111/tan.14817
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Clinical risk profile associated with SARS-CoV-2 infection and complications in the emergency area of a pediatric COVID-19 center.

    Olivar-López, Víctor / Leyva-Barrera, Ana / López-Martínez, Briceida / Parra-Ortega, Israel / Márquez-González, Horacio

    Boletin medico del Hospital Infantil de Mexico

    2020  Volume 77, Issue 5, Page(s) 221–227

    Abstract: Background: In February 2020, the disease caused by the novel coronavirus (SARS-CoV-2), was classified as a pandemic. In the pediatric population, coronavirus disease (COVID)-19 has a reported mortality of less than 6% in complicated cases; however, the ...

    Title translation Perfil clínico de riesgo asociado a infección y complicaciones por SARS-CoV-2 en el área de urgencias de un centro pediátrico COVID-19.
    Abstract Background: In February 2020, the disease caused by the novel coronavirus (SARS-CoV-2), was classified as a pandemic. In the pediatric population, coronavirus disease (COVID)-19 has a reported mortality of less than 6% in complicated cases; however, the clinical characteristics and severity are not the same as those presented in the adult population. This study aimed to describe the clinical manifestations of patients younger than 18 years old and their association with the confirmation of the test and outcomes.
    Methods: We conducted an analytical cross-sectional study of symptoms suggestive for SARS-CoV-2 infection. All subjects with a confirmatory test for SARS-CoV-2 were included. Initial symptoms, history of influenza vaccination, and previous contact were documented, and mortality and the requirement for assisted mechanical ventilation were identified. The proportions of the variables were compared with the χ
    Results: Of a total of 510 subjects, 76 (15%) were positive for SARS-CoV-2. The associated symptoms were chest pain, sudden onset of symptoms, and general malaise. The variable most associated with contagion was the exposure to a relative with a confirmed diagnosis of COVID-19. Infants and subjects without the influenza vaccine showed an increased risk for respiratory complications.
    Conclusions: The frequency of positivity in the test was 15% (infants and adolescents represented 64% of the confirmed cases), and the associated factors identified were contact with a confirmed case, sudden onset of symptoms, and chest pain.
    MeSH term(s) Adolescent ; Betacoronavirus/isolation & purification ; COVID-19 ; COVID-19 Testing ; Chest Pain/etiology ; Child ; Child, Preschool ; Clinical Laboratory Techniques ; Coronavirus Infections/complications ; Coronavirus Infections/diagnosis ; Coronavirus Infections/epidemiology ; Cross-Sectional Studies ; Female ; Humans ; Infant ; Male ; Pandemics ; Pneumonia, Viral/complications ; Pneumonia, Viral/diagnosis ; Pneumonia, Viral/epidemiology ; Risk Factors ; SARS-CoV-2
    Keywords covid19
    Language English
    Publishing date 2020-10-15
    Publishing country Mexico
    Document type Journal Article
    ZDB-ID 730519-9
    ISSN 1665-1146 ; 1665-1146 ; 0539-6115 ; 0539-6123
    ISSN (online) 1665-1146
    ISSN 1665-1146 ; 0539-6115 ; 0539-6123
    DOI 10.24875/BMHIM.20000198
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Analysis of the Behaviour of Immunoglobulin G Antibodies in Children and Adults Convalescing From Severe Acute Respiratory Syndrome-Coronavirus-2 Infection.

    Márquez-González, Horacio / López-Martínez, Briceida / Parra-Ortega, Israel / de la Rosa-Zamboni, Daniela / Salazar-García, Marcela / Olivar-López, Victor / Klünder-Klünder, Miguel

    Frontiers in pediatrics

    2021  Volume 9, Page(s) 671831

    Abstract: The pandemic caused by SARS CoV-2 (COVID-19) has affected millions of people since 2020. There are clinical differences and in mortality between the adult and paediatric population. Recently, the immune response through the development of antibodies has ... ...

    Abstract The pandemic caused by SARS CoV-2 (COVID-19) has affected millions of people since 2020. There are clinical differences and in mortality between the adult and paediatric population. Recently, the immune response through the development of antibodies has gained relevance due to the risk of reinfection and vaccines' development.
    Language English
    Publishing date 2021-08-17
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2711999-3
    ISSN 2296-2360
    ISSN 2296-2360
    DOI 10.3389/fped.2021.671831
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Genotyping of the Major SARS-CoV-2 Clade by Short-Amplicon High-Resolution Melting (SA-HRM) Analysis.

    Diaz-Garcia, Hector / Guzmán-Ortiz, Ana L / Angeles-Floriano, Tania / Parra-Ortega, Israel / López-Martínez, Briceida / Martínez-Saucedo, Mirna / Aquino-Jarquin, Guillermo / Sánchez-Urbina, Rocío / Quezada, Hector / Granados-Riveron, Javier T

    Genes

    2021  Volume 12, Issue 4

    Abstract: The genome of the SARS-CoV-2 virus, the causal agent of the COVID-19 pandemic, has diverged due to multiple mutations since its emergence as a human pathogen in December 2019. Some mutations have defined several SARS-CoV-2 clades that seem to behave ... ...

    Abstract The genome of the SARS-CoV-2 virus, the causal agent of the COVID-19 pandemic, has diverged due to multiple mutations since its emergence as a human pathogen in December 2019. Some mutations have defined several SARS-CoV-2 clades that seem to behave differently in terms of regional distribution and other biological features. Next-generation sequencing (NGS) approaches are used to classify the sequence variants in viruses from individual human patients. However, the cost and relative scarcity of NGS equipment and expertise in developing countries prevent studies aimed to associate specific clades and variants to clinical features and outcomes in such territories. As of March 2021, the GR clade and its derivatives, including the B.1.1.7 and B.1.1.28 variants, predominate worldwide. We implemented the post-PCR small-amplicon high-resolution melting analysis to genotype SARS-CoV-2 viruses isolated from the saliva of individual patients. This procedure was able to clearly distinguish two groups of samples of SARS-CoV-2-positive samples predicted, according to their melting profiles, to contain GR and non-GR viruses. This grouping of the samples was validated by means of amplification-refractory mutation system (ARMS) assay as well as Sanger sequencing.
    MeSH term(s) COVID-19/virology ; Genotyping Techniques/methods ; High-Throughput Nucleotide Sequencing ; Humans ; Mutation ; Nucleic Acid Denaturation ; RNA, Viral/isolation & purification ; SARS-CoV-2/genetics
    Chemical Substances RNA, Viral
    Language English
    Publishing date 2021-04-05
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2527218-4
    ISSN 2073-4425 ; 2073-4425
    ISSN (online) 2073-4425
    ISSN 2073-4425
    DOI 10.3390/genes12040531
    Database MEDical Literature Analysis and Retrieval System OnLINE

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