Andrés Delgado Cañedo’s research while affiliated with Federal University of Pampa and other places

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Publications (5)


Figura 1. Butia eriospatha (Mart. Ex Drude) Becc. A. hábito; B. detalhe do indumento lanuginoso da bráctea peduncular.
Figura 2. Mapa de distribuição de B. eriospatha (Mart. ex Drude) Becc.
Butia eriospatha: DUAS DÉCADAS DE MUDANÇAS AMBIENTAIS DA REGIÃO DE OCORRÊNCIA NATURAL DA ESPÉCIE
  • Article
  • Full-text available

October 2024

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38 Reads

Revista Destaques Acadêmicos

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Patrícia de Oliveira Neves

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Andrés Delgado Cañedo

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Antônio Batista Pereira

Butia eriospatha cresce em regiões de clima temperado do bioma Mata Atlântica (M. A.) associada à Floresta Ombrófila Mista e Campos de Altitude dos Estados Brasileiros do Rio Grande do Sul, Santa Catarina e Paraná e está classificado como vulnerável pela IUCN. O objetivo do estudo foi comparar os locais de ocorrência da espécie e analisar as principais mudanças ambientais nestas regiões, nos anos de 1998 e 2020 e a diferença em áreas desmatadas entre 2019-2020. Os registros de ocorrência foram obtidos através do Herbário Virtual Reflora e SpeciesLink, tabulados e exportados para o software QGIS, resultando em um mapa georreferenciado. No período 2019-2020 a área desmatada na M. A. foi de 23.873 ha. Analisando os dados individuais dos estados do Paraná, Santa Catarina e Rio Grande do Sul, observou-se significativo aumento da área desmatada entre 2019 e 2020, respectivamente, 160%, 254% e 87%. Ao analisar os dados de usos específicos no bioma M. A., em 1998 e 2020, observou-se o aumento do uso da terra para agropecuária e urbanização e a diminuição da formação campestre natural. Essas alterações ambientais podem acentuar o declínio das populações naturais, influenciando a diversidade genética devido ao isolamento geográfico, podendo causar, inclusive, a extinção da espécie.

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Nutritional aspects and lifestyle related to depressive symptoms: a case-control study

October 2023

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3 Reads

Brazilian Journal of Health Review

Samara Marques Dos Reis

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Leandro Leal Galarça

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Fabiane de Fátima Severo Santana

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[...]

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Andrés Delgado Cañedo

Depression is a mental condition that affects more than 322 million people worldwide. The nutritional status of individuals diagnosed with depression may change. Individuals with depression may experience changes in eating habits and weight changes. The main objective of this study is to relate the nutritional aspect and lifestyle of depressive patients with the symptoms presented. Through a case-control study, nutritional status, depressive symptoms with the Beck II Inventory, physical activity, tobacco and alcohol consumption, and family history were investigated. The sample consisted of 389 individuals (217 depressive and 172 controls) with a mean age of 45.6±15.6 years (range 16 to 83 years), most of them female (78.1%). In the results obtained, most patients with depression had severe symptoms of depression. Depression was associated with a higher body mass index (BMI) and obesity. Patients with depression were less likely to consume alcohol but more likely to smoke. It is concluded that individuals with depression have a higher prevalence of overweight, smoking, family history of depression and use of medications. A multidisciplinary approach is critical for treating depression and improving patients' quality of life.


Evaluation of seven gene loci from the WRKY gene family in Butia (Becc.) Becc. species (Arecaceae) for future phylogenetic inference

October 2023

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43 Reads

Cuadernos de Educación y Desarrollo

The WRKY genes belong to a family of transcriptional proteins that have been useful in the phylogenetic inference of plants, especially for representatives of the Arecaceae. This study aimed to expand the molecular data for species of the genus Butia (Arecaceae), through the WRKY2, WRKY6, WRKY7, WRKY12, WRKY16, WRKY19, and WRKY21 gene markers, using the species Butia odorata (Barb.Rodr.) Noblick, Butia lallemantii Deble & Marchiori, Butia buenopolensis Sant’Anna-Santos, and Butia exilata Deble & Marchiori. We obtained positive results in the amplifications for the gene regions of interest for WRKY6, WRKY7, and WRKY21 for the three individuals evaluated for the four species. For the WRKY2 gene, we only obtained amplifications from the individuals of the B. buenopolensis. The WRKY16 gene amplified for all species, except B. buenopolensis. On the other hand, the WRKY12 and WRKY19 gene regions did not amplify for any of the individuals evaluated from the four species included in this study. With this work, we aimed to expand the molecular data of species belonging to the Butia genus, in order to infer the molecular phylogeny of species that occur naturally in Brazil in the future.


Flowchart representing the hypothesis testing. MAF = maximum allele frequency, used to filter SNPs after Pearson’s correlation test.
Uncovering Disease-Related Polymorphisms through Correlations between SNP Frequencies, Population and Epidemiological Data

June 2023

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20 Reads

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2 Citations

Background: According to GWAS, which analyzes large amounts of DNA variants in case-control strategies, the genetic differences between two human individuals do not exceed 0.5%. As a consequence, finding biological significance in GWAS results is a challenging task. We propose an alternative method for identifying disease-causing variants based on the simultaneous evaluation of genome variant data acquired from public databases and pathology epidemiological data. This method is grounded on the following premise: If a particular pathology is common in a community, genetic variants that confer susceptibility to that pathology should also be common in that population. Methods: Three groups of genes were evaluated to test this premise: variants related to depression found through GWAS, six genes unrelated to depression, and four genes already genotyped in case-control studies involving depression (TPH2, NR3C1, SLC6A2 and SLC6A3). In terms of GWAS depression-related variants, nine of the 82 SNPs evaluated showed a favorable correlation between allele frequency and epidemiological data. As anticipated, none of the 286 SNPs were correlated in the neutral group. In terms of proof of concept, two THP2 variants, 26 NR3C1 variants and four SLC6A3 variants were found to be related to depression rates and epidemiological statistics. Conclusions: Together with data from the literature involving these SNPs, these correlations support this strategy as a complementary method for identifying possible disease-causing variants.


Análise quali-quantitativa do DNA genômico extraído de folha e estipe de x Butyagrus nabonnandii (Prosch.) Vorster

August 2022

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75 Reads

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2 Citations

Research Society and Development

Ferramentas de identificação baseadas em DNA são de suma importância em estudos genéticos de plantas, onde o isolamento e a purificação são passos cruciais. O objetivo do presente estudo foi testar a eficiência de métodos de conservação e de maceração de materiais biológicos na extração de DNA genômico de folha e estipe de x Butyagrus nabonnandii (Prosch.) Vorster. Os dados foram analisados com ajuda do software Genes via análise de variância, considerando o esquema fatorial 3x2x2x2, com três repetições (três espécimes do híbrido; dois tipos de material biológico, estipe e folha; dois tipos de conservação, fresco e desidratado; dois tipos de maceração, com e sem nitrogênio líquido). As médias foram analisadas pelo teste Tukey a 5% de probabilidade de erro. O DNA genômico foi avaliado por espectrofotometria para determinar a concentração. A integridade foi determinada por eletroforese em gel de agarose. Foram utilizados dois primers da família gênica WRKY para testar a qualidade do DNA obtido em reações de PCR. As análises estatísticas revelaram diferenças significativas nas concentrações de DNA entre os métodos avaliados. Obteve-se maiores quantidades de DNA a partir da extração de folhas frescas quando comparadas às folhas desidratadas. O rendimento do DNA a partir de estipe fresco e desidratado não variou entre os métodos testados. O uso de nitrogênio líquido pode ser dispensado, conforme resultado dos padrões das bandas nas reações de PCR. Foi possível extrair DNA de qualidade e quantidades suficientes dos materiais biológicos de x B. nabonnandii, que amplificaram as regiões genômicas de interesse.