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  1. Article: Beyond the HLA polymorphism: A complex pattern of genetic susceptibility to pemphigus.

    Petzl-Erler, Maria Luiza

    Genetics and molecular biology

    2020  Volume 43, Issue 3, Page(s) e20190369

    Abstract: Pemphigus is a group of autoimmune bullous skin diseases that result in significant morbidity. As for other multifactorial autoimmune disorders, environmental factors may trigger the disease in genetically susceptible individuals. The goals of this ... ...

    Abstract Pemphigus is a group of autoimmune bullous skin diseases that result in significant morbidity. As for other multifactorial autoimmune disorders, environmental factors may trigger the disease in genetically susceptible individuals. The goals of this review are to summarize the state of knowledge about the genetic variation that may affect the susceptibility and pathogenesis of pemphigus vulgaris and pemphigus foliaceus - both the endemic and the sporadic forms -, to compare and discuss the possible meaning of the associations reported, and to propose recommendations for new research initiatives. Understanding how genetic variants translate into pathogenic mechanisms and phenotypes remains a mystery for most of the polymorphisms that contribute to disease susceptibility. However, genetic studies provide a strong foundation for further developments in this field by generating testable hypotheses. Currently, results still have limited influence on disease prevention and prognosis, drug development, and clinical practice, although the perspectives for future applications for the benefit of patients are encouraging. Recommendations for the continued advancement of our understanding as to the impact of genetic variation on pemphigus include these partially overlapping goals: (1) Querying the functional effect of genetic variants on the regulation of gene expression through their impact on the nucleotide sequence of cis regulatory DNA elements such as promoters and enhancers, the splicing of RNA, the structure of regulatory RNAs and proteins, binding of these regulatory molecules to regulatory DNA elements, and alteration of epigenetic marks; (2) identifying key cell types and cell states that are implicated in pemphigus pathogenesis and explore their functional genomes; (3) integrating structural and functional genomics data; (4) performing disease-progression longitudinal studies to disclose the causal relationships between genetic and epigenetic variation and intermediate disease phenotypes; (5) understanding the influence of genetic and epigenetic variation in the response to treatment and the severity of the disease; (6) exploring gene-gene and genotype-environment interactions; (7) developing improved pemphigus-prone and non-prone animal models that are appropriate for research about the mechanisms that link genotypes to pemphigus. Achieving these goals will demand larger samples of patients and controls and multisite collaborations.
    Language English
    Publishing date 2020-07-01
    Publishing country Brazil
    Document type Journal Article
    ZDB-ID 1445712-x
    ISSN 1678-4685 ; 1415-4757
    ISSN (online) 1678-4685
    ISSN 1415-4757
    DOI 10.1590/1678-4685-gmb-2019-0369
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Distribution of a novel

    Fernandes, Vanessa Câmara / Pretti, Marco Antônio M / Tsuneto, Luiza Tamie / Petzl-Erler, Maria Luiza / Suarez-Kurtz, Guilherme

    Frontiers in genetics

    2023  Volume 14, Page(s) 1114742

    Abstract: ... ...

    Abstract The
    Language English
    Publishing date 2023-03-21
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2606823-0
    ISSN 1664-8021
    ISSN 1664-8021
    DOI 10.3389/fgene.2023.1114742
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Single Nucleotide Variants as Proxies for

    Fernandes, Vanessa Câmara / Pretti, Marco Antônio M / Tsuneto, Luiza Tamie / Petzl-Erler, Maria Luiza / Suarez-Kurtz, Guilherme

    Frontiers in pharmacology

    2022  Volume 13, Page(s) 849136

    Abstract: Carbamazepine triggers dermatologic hypersensitivity reactions, associated with specific human leukocyte antigens (HLAs), ... ...

    Abstract Carbamazepine triggers dermatologic hypersensitivity reactions, associated with specific human leukocyte antigens (HLAs), especially
    Language English
    Publishing date 2022-04-14
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2587355-6
    ISSN 1663-9812
    ISSN 1663-9812
    DOI 10.3389/fphar.2022.849136
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Population structure and forensic genetic analyses in Guarani and Kaingang Amerindian populations from Brazil.

    Schellin-Becker, Claudia Marina / Calonga-Solís, Verónica / Malaghini, Marcelo / Sabbag, Luiza Rauen / Petzl-Erler, Maria Luiza / Augusto, Danillo G / Malheiros, Danielle

    Forensic science international. Genetics

    2022  Volume 58, Page(s) 102678

    Abstract: When DNA profile comparisons between a crime scene trace and a reference sample generate correspondence, the match probability has to be estimated, so that evaluation of the strength of the forensic DNA evidence can be made. The random match probability ... ...

    Abstract When DNA profile comparisons between a crime scene trace and a reference sample generate correspondence, the match probability has to be estimated, so that evaluation of the strength of the forensic DNA evidence can be made. The random match probability estimations require information on allele frequencies and an adjustment factor, referred to as theta (θ) or Fst, a co-ancestry correction factor for subpopulation effects. The θ value has been standardized for urban and isolated populations, but inconsistencies have been reported when it is specifically calculated for smaller and isolated populations, including Amerindian populations. Notably, attempts to characterize forensic markers of these minor populations have been extensively limited and more conservative estimates of the correction factor may be generated for each of them. Therefore, we estimate allele frequencies of 21 autosomal STR markers used for forensic testing and calculated relevant forensic parameters for the set. In addition, we featured the possible structure of five Brazilian Amerindian populations that have been genetically isolated for centuries so we could obtain the appropriate θ value for them. The sample consisted of 319 individuals: (1) 121 Kaingang, from two communities: Ivaí (KIV=61) and Rio das Cobras (KRC=60); and (2) 198 Guaranis from three communities: Mbya from Rio das Cobras (GRC=51), Guarani Ñandeva (GND=71) and Guarani Kaiowá (GKW=76). Between Guarani populations low (Rst=0.0402, p < 10
    MeSH term(s) Brazil ; Forensic Genetics ; Gene Frequency ; Genetics, Population ; Humans ; Indians, South American/genetics
    Language English
    Publishing date 2022-02-08
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 2493339-9
    ISSN 1878-0326 ; 1872-4973
    ISSN (online) 1878-0326
    ISSN 1872-4973
    DOI 10.1016/j.fsigen.2022.102678
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Uniparental markers reveal new insights on subcontinental ancestry and sex-biased admixture in Brazil

    Joerin-Luque, Iriel A. / Augusto, Danillo G. / Calonga-Solís, Verónica / de Almeida, Rodrigo Coutinho / Lopes, Claudemira Vieira Gusmão / Petzl-Erler, Maria Luiza / Beltrame, Marcia Holsbach

    Molecular genetics and genomics. 2022 Mar., v. 297, no. 2

    2022  

    Abstract: The Brazilian population is a product of asymmetric admixture among European men and Amerindian and African women. However, Brazilian subcontinental ancestry is scarcely documented, especially regarding its African roots. Here, we aimed to unveil the ... ...

    Abstract The Brazilian population is a product of asymmetric admixture among European men and Amerindian and African women. However, Brazilian subcontinental ancestry is scarcely documented, especially regarding its African roots. Here, we aimed to unveil the uniparental continental and subcontinental contributions from distinct Brazilian regions, including South (n = 43), Southeast (n = 71), the poorly genetically characterized Central-Western region (n = 323), and a subset of unique Brazilian Amerindians (n = 24), in the context of their genome-wide ancestral contributions. The overwhelming majority of European Y haplogroups (85%) contrast sharply with the predominant African and Amerindian mtDNA haplogroups (73.2%) in admixed populations, whereas in Amerindians, non-Native haplogroups could only be detected through the paternal line. Our in-depth investigation of uniparental markers showed signals of an Andean and Central-Brazilian Amerindian maternal contribution to Southeastern and Central-Western Brazil (83.1 ± 2.1% and 56.9 ± 0.2%, respectively), the last having the highest paternal Amerindian ancestry yet described for an admixed Brazilian region (9.7%) and contrasting with higher Southern-Brazilian Amerindian contribution to Southern Brazil (59.6 ± 1%). Unlike the higher African Bantu contribution previously reported for the South and Southeast, a relevant Western African non-Bantu contribution was detected in those regions (85.7 ± 5% and 71.8 ± 10.8% respectively). In contrast, a higher Bantu contribution was described for the first time in the Central-West (64.8 ± 1.3% maternal and 86.9 ± 9.6% paternal). We observed sex-biased signatures consistent with the historically recorded Brazilian colonization and added new insights in the subcontinental maternal ancestry of Brazilians from regions never studied at this level.
    Keywords American Indians ; ancestry ; genomics ; Andes region ; Brazil
    Language English
    Dates of publication 2022-03
    Size p. 419-435.
    Publishing place Springer Berlin Heidelberg
    Document type Article
    ISSN 1617-4615
    DOI 10.1007/s00438-022-01857-7
    Database NAL-Catalogue (AGRICOLA)

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  6. Article ; Online: The Second Highest Prevalence of Celiac Disease Worldwide: Genetic and Metabolic Insights in Southern Brazilian Mennonites.

    Oliveira, Luana Caroline / Dornelles, Amanda Coelho / Nisihara, Renato Mitsunori / Bruginski, Estevan Rafael Dutra / Santos, Priscila Ianzen Dos / Cipolla, Gabriel Adelman / Boschmann, Stefanie Epp / Messias-Reason, Iara José de / Campos, Francinete Ramos / Petzl-Erler, Maria Luiza / Boldt, Angelica Beate Winter

    Genes

    2023  Volume 14, Issue 5

    Abstract: Celiac disease (CD), despite its high morbidity, is an often-underdiagnosed autoimmune enteropathy. Using a modified version of the Brazilian questionnaire of the 2013 National Health Survey, we interviewed 604 Mennonites of Frisian/Flemish origin that ... ...

    Abstract Celiac disease (CD), despite its high morbidity, is an often-underdiagnosed autoimmune enteropathy. Using a modified version of the Brazilian questionnaire of the 2013 National Health Survey, we interviewed 604 Mennonites of Frisian/Flemish origin that have been isolated for 25 generations. A subgroup of 576 participants were screened for IgA autoantibodies in serum, and 391 participants were screened for HLA-DQ2.5/DQ8 subtypes. CD seroprevalence was 1:29 (3.48%, 95% CI = 2.16-5.27%) and biopsy-confirmed CD was 1:75 (1.32%, 95% CI = 0.57-2.59%), which is superior to the highest reported global prevalence (1:100). Half (10/21) of the patients did not suspect the disease. HLA-DQ2.5/DQ8 increased CD susceptibility (OR = 12.13 [95% CI = 1.56-94.20],
    MeSH term(s) Humans ; Celiac Disease/epidemiology ; Celiac Disease/genetics ; Prevalence ; Brazil/epidemiology ; Seroepidemiologic Studies ; Intestines
    Language English
    Publishing date 2023-04-30
    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/genes14051026
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: The landscape of the immunoglobulin repertoire in endemic pemphigus foliaceus.

    Calonga-Solís, Verónica / Olbrich, Michael / Ott, Fabian / Adelman Cipolla, Gabriel / Malheiros, Danielle / Künstner, Axel / Farias, Ticiana D J / Camargo, Carolina M / Petzl-Erler, Maria Luiza / Busch, Hauke / Fähnrich, Anke / Augusto, Danillo G

    Frontiers in immunology

    2023  Volume 14, Page(s) 1189251

    Abstract: Introduction: Primarily driven by autoreactive B cells, pemphigus foliaceus (PF) is an uncommon autoimmune blistering skin disease of sporadic occurrence worldwide. However, PF reaches a prevalence of 3% in the endemic areas of Brazil, the highest ever ... ...

    Abstract Introduction: Primarily driven by autoreactive B cells, pemphigus foliaceus (PF) is an uncommon autoimmune blistering skin disease of sporadic occurrence worldwide. However, PF reaches a prevalence of 3% in the endemic areas of Brazil, the highest ever registered for any autoimmune disease, which indicates environmental factors influencing the immune response in susceptible individuals. We aimed to provide insights into the immune repertoire of patients with PF living in the endemic region of the disease, compared to healthy individuals from the endemic region and a non-endemic area.
    Methods: We characterized the B-cell repertoire in i) nontreated patients (n=5); ii) patients under immunosuppressive treatment (n=5); iii) patients in remission without treatment (n=6); and two control groups iv) from the endemic (n=6) and v) non-endemic areas in Brazil (n=4). We used total RNA extracted from peripheral blood mononuclear cells and performed a comprehensive characterization of the variable region of immunoglobulin heavy chain (IGH) in IgG and IgM using next-generation sequencing.
    Results: Compared to individuals from a different area, we observed remarkably lower clonotype diversity in the B-cell immune repertoire of patients and controls from the endemic area (
    Discussion: Our results indicate that environmental factors, in addition to disease state, impact the characteristics of the repertoire. Our findings can be applied to further investigation of the environmental factors that trigger pemphigus and expand the knowledge for identifying new targeted and more effective therapies.
    MeSH term(s) Humans ; Pemphigus ; Leukocytes, Mononuclear ; Blister ; Immunoglobulins
    Chemical Substances Immunoglobulins
    Language English
    Publishing date 2023-07-28
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, N.I.H., Extramural
    ZDB-ID 2606827-8
    ISSN 1664-3224 ; 1664-3224
    ISSN (online) 1664-3224
    ISSN 1664-3224
    DOI 10.3389/fimmu.2023.1189251
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: An immunogenetic view of COVID-19.

    Aguiar, Vitor R C / Augusto, Danillo G / Castelli, Erick C / Hollenbach, Jill A / Meyer, Diogo / Nunes, Kelly / Petzl-Erler, Maria Luiza

    Genetics and molecular biology

    2021  Volume 44, Issue 1 Suppl 1, Page(s) e20210036

    Abstract: Meeting the challenges brought by the COVID-19 pandemic requires an interdisciplinary approach. In this context, integrating knowledge of immune function with an understanding of how genetic variation influences the nature of immunity is a key challenge. ...

    Abstract Meeting the challenges brought by the COVID-19 pandemic requires an interdisciplinary approach. In this context, integrating knowledge of immune function with an understanding of how genetic variation influences the nature of immunity is a key challenge. Immunogenetics can help explain the heterogeneity of susceptibility and protection to the viral infection and disease progression. Here, we review the knowledge developed so far, discussing fundamental genes for triggering the innate and adaptive immune responses associated with a viral infection, especially with the SARS-CoV-2 mechanisms. We emphasize the role of the HLA and KIR genes, discussing what has been uncovered about their role in COVID-19 and addressing methodological challenges of studying these genes. Finally, we comment on questions that arise when studying admixed populations, highlighting the case of Brazil. We argue that the interplay between immunology and an understanding of genetic associations can provide an important contribution to our knowledge of COVID-19.
    Language English
    Publishing date 2021-08-25
    Publishing country Brazil
    Document type Journal Article
    ZDB-ID 1445712-x
    ISSN 1678-4685 ; 1415-4757
    ISSN (online) 1678-4685
    ISSN 1415-4757
    DOI 10.1590/1678-4685-GMB-2021-0036
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Region 1p13.2 including the RSBN1, PTPN22, AP4B1 and long non-coding RNA genes does not bear risk factors for endemic pemphigus foliaceus (fogo selvagem).

    Lobo-Alves, Sara Cristina / de Oliveira, Liana Alves / Petzl-Erler, Maria Luiza

    International journal of immunogenetics

    2019  Volume 46, Issue 3, Page(s) 139–145

    Abstract: Pemphigus foliaceus (PF) is an autoimmune skin disease characterized by autoantibodies directed mainly against desmoglein-1. The purpose of this study was to determine whether differential susceptibility to endemic PF in Brazil (fogo selvagem) is ... ...

    Abstract Pemphigus foliaceus (PF) is an autoimmune skin disease characterized by autoantibodies directed mainly against desmoglein-1. The purpose of this study was to determine whether differential susceptibility to endemic PF in Brazil (fogo selvagem) is associated with polymorphisms at the cytogenetic location 1p13.2. Four single nucleotide polymorphisms that together tag 28 SNPs on a segment of approximately 312,000 bp encompassing the protein-coding genes MAGI3, PHTF1, RSBN1, PTPN22, BCL2L15, AP4B1, DCLRE1B, the pseudogenes MTND5P20, RPS2P14 (AL133517.1) and the long non-coding RNA genes AL137856.1, and AP4B1-AS1 were used as markers for association analysis in a case-control study. Allele, genotype and haplotype frequencies of rs33996649, rs2476601, rs3789604 and rs3195954 were compared between patient and control samples. No significant association was found. Lack of association with rs2476601 of the PTPN22 gene agrees with previous results for pemphigus vulgaris and the Tunisian form of endemic pemphigus foliaceus. The other three SNPs had never been analysed before in any form of pemphigus. We conclude that variants in structural and regulatory sites of region 1p13.2 are not susceptibility factors for fogo selvagem. We suggest careful investigation of this genomic region in diseases that had been previously associated with PTPN22, since there are several other genes relevant for immune-mediated diseases located in 1p13.2.
    MeSH term(s) Brazil/epidemiology ; Chromosomes, Human, Pair 1/genetics ; Genetic Predisposition to Disease ; Humans ; Pemphigus/epidemiology ; Pemphigus/genetics ; Polymorphism, Single Nucleotide ; Protein Tyrosine Phosphatase, Non-Receptor Type 22/genetics ; RNA, Long Noncoding/genetics
    Chemical Substances RNA, Long Noncoding ; PTPN22 protein, human (EC 3.1.3.48) ; Protein Tyrosine Phosphatase, Non-Receptor Type 22 (EC 3.1.3.48)
    Language English
    Publishing date 2019-03-18
    Publishing country England
    Document type Journal Article
    ZDB-ID 2177883-8
    ISSN 1744-313X ; 1744-3121
    ISSN (online) 1744-313X
    ISSN 1744-3121
    DOI 10.1111/iji.12423
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: NUDT15 Polymorphism in Native American Populations of Brazil.

    Suarez-Kurtz, Guilherme / Brisson, Gisele D / Hutz, Mara H / Petzl-Erler, Maria Luiza / Salzano, Francisco M

    Clinical pharmacology and therapeutics

    2019  Volume 105, Issue 6, Page(s) 1321–1322

    MeSH term(s) Brazil ; Genotype ; Humans ; Indians, North American ; Pharmacogenetics ; Polymorphism, Genetic
    Language English
    Publishing date 2019-03-21
    Publishing country United States
    Document type Letter ; Research Support, Non-U.S. Gov't ; Comment
    ZDB-ID 123793-7
    ISSN 1532-6535 ; 0009-9236
    ISSN (online) 1532-6535
    ISSN 0009-9236
    DOI 10.1002/cpt.1379
    Database MEDical Literature Analysis and Retrieval System OnLINE

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