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Cardoso DC, Baldez BCL, Pereira AH, Kalapothakis E, Rosse IC, Cristiano MP. De novo assembly of the complete mitochondrial genome of Mycetophylax simplex Emery, 1888 through organelle targeting revels no substantial expansion of gene spacers, but rather some slightly shorter genes. Mol Genet Genomics 2024; 299:16. [PMID: 38411741 DOI: 10.1007/s00438-024-02099-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 12/10/2023] [Indexed: 02/28/2024]
Abstract
Mitochondria play a key role in cell biology and have their own genome, residing in a highly oxidative environment that induces faster changes than the nuclear genome. Because of this, mitochondrial markers have been exploited to reconstruct phylogenetic and phylogeographic relationships in studies of adaptation and molecular evolution. In this study, we determined the complete mitogenome of the fungus-farming ant Mycetophylax simplex (Hymenoptera, Formicidae) and conducted a comparative analysis among 29 myrmicine ant mitogenomes. Mycetophylax simplex is an endemic ant that inhabits sand dunes along the southern Atlantic coast. Specifically, the species occur in the ecosystem known as "restinga", within the Atlantic Forest biome. Due to habitat degradation, land use and decline of restinga habitats, the species is considered locally extinct in extremely urban beaches and is listed as vulnerable on the Brazilian Red List (ICMBio). We employed a mitochondrion-targeting approach to obtain the complete mitogenome through high-throughput DNA sequencing technology. This method allowed us to determine the mitogenome with high performance, coverage and low cost. The circular mitogenome has a length of 16,367 base pairs enclosing 37 genes (13 protein-coding genes, 22 tRNAs and 2 rRNAs) along with one control region (CR). All the protein-coding genes begin with a typical ATN codon and end with the canonical stop codons. All tRNAs formed the fully paired acceptor stems and fold into the typical cloverleaf-shaped secondary structures. The gene order is consistent with the shared Myrmicinae structure, and the A + T content of the majority strand is 81.51%. Long intergenic spacers were not found but some gene are slightly shorter. The phylogenetic relationships based on concatenated nucleotide and amino acid sequences of the 13 protein-coding genes, using Maximum Likelihood and Bayesian Inference methods, indicated that mitogenome sequences were useful in resolving higher-level relationship within Formicidae.
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Affiliation(s)
- Danon Clemes Cardoso
- Genetics and Evolution of Ants Research Group - GEF, Universidade Federal de Ouro Preto, Ouro Preto, Mina Gerais, 35400-000, Brazil.
| | - Brenda Carla Lima Baldez
- Programa de Pós-Graduação em Ecologia de Biomas Tropicais, Universidade Federal de Ouro Preto, Ouro Preto, Mina Gerais, 35400-000, Brazil
| | - Adriana Heloísa Pereira
- Departamento de Genética, Ecologia e Evolução, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, 31270-010, Brazil
| | - Evanguedes Kalapothakis
- Departamento de Genética, Ecologia e Evolução, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, 31270-010, Brazil
| | - Izinara Cruz Rosse
- Departamento de Farmácia, Escola de Farmácia, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, 35400-000, Brazil
| | - Maykon Passos Cristiano
- Genetics and Evolution of Ants Research Group - GEF, Universidade Federal de Ouro Preto, Ouro Preto, Mina Gerais, 35400-000, Brazil
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Gomes PT, Rosse IC, Moraes LÂG, Kalapothakis E, de Azevedo CS, Cardoso DC, Cristiano MP. Genetic diversity and relatedness in captive collared peccaries Dicotyles tajacu (Linnaeus, 1758) (Cetartiodactyla: Tayassuidae) estimated by microsatellite genotyping using high-throughput sequencing: Implications for their conservation and reintroduction. Zoo Biol 2023; 42:789-796. [PMID: 37466265 DOI: 10.1002/zoo.21796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 05/04/2023] [Accepted: 07/07/2023] [Indexed: 07/20/2023]
Abstract
The global population of Dicotyles tajacu (Linnaeus, 1758) (Cetartiodactyla: Tayassuidae), commonly known as the collared peccary and distributed in the Neotropics, is currently in decline due to anthropogenic pressures. In this study, five microsatellite loci were used to genetically characterize a group of 20 captive-born collared peccaries intended for reintroduction. This study aimed to evaluate the genetic diversity and relatedness of captive individuals using microsatellite markers. The genetic data generated were used to evaluate the viability of the reintroduction and to propose measures for the management and conservation of this species. In this study, we found relatively high genetic diversity indices, indicating that the group was genetically diverse. Inbreeding coefficients with negative values were observed, indicating an excess of alleles in heterozygosis and an absence of inbreeding. One locus showed deviation from Hardy-Weinberg equilibrium, which may have been caused by the mixing of individuals from different origins. Relatedness analysis indicated that some individuals were highly related, with coefficients indicating they may be first-degree relatives. Our findings indicate that the studied group has enough genetic diversity to be released into nature, but the high individual relatedness found would require the adoption of strategies after the release of animals in the wild to ensure their persistence.
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Affiliation(s)
- Paula Teixeira Gomes
- Programa de Pós-Graduação em Ecologia de Biomas Tropicais, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto (UFOP), Ouro Preto, Minas Gerais, Brazil
| | - Izinara Cruz Rosse
- Departamento de Farmácia, Programa de Pós-Graduação em Biotecnologia, Universidade Federal de Ouro Preto (UFOP), Ouro Preto, Minas Gerais, Brazil
- Laboratório Multiusuário de Bioinformática da Universidade Federal de Ouro Preto (UFOP), Núcleo de Pesquisa em Ciências Biológicas (NUPEB), Ouro Preto, Minas Gerais, Brazil
| | - Lauro Ângelo Gonçalves Moraes
- Laboratório Multiusuário de Bioinformática da Universidade Federal de Ouro Preto (UFOP), Núcleo de Pesquisa em Ciências Biológicas (NUPEB), Ouro Preto, Minas Gerais, Brazil
| | - Evanguedes Kalapothakis
- Departamento de Genética, Evolução e Ecologia, Laboratório de Biotecnologia e Marcadores Moleculares, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | - Cristiano Schetini de Azevedo
- Programa de Pós-Graduação em Ecologia de Biomas Tropicais, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto (UFOP), Ouro Preto, Minas Gerais, Brazil
- Departamento de Biodiversidade Evolução e Meio Ambiente, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto (UFOP), Ouro Preto, Minas Gerais, Brazil
| | - Danon Clemes Cardoso
- Programa de Pós-Graduação em Ecologia de Biomas Tropicais, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto (UFOP), Ouro Preto, Minas Gerais, Brazil
- Departamento de Biodiversidade Evolução e Meio Ambiente, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto (UFOP), Ouro Preto, Minas Gerais, Brazil
| | - Maykon Passos Cristiano
- Programa de Pós-Graduação em Ecologia de Biomas Tropicais, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto (UFOP), Ouro Preto, Minas Gerais, Brazil
- Departamento de Biodiversidade Evolução e Meio Ambiente, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto (UFOP), Ouro Preto, Minas Gerais, Brazil
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Silva AC, Pereira MA, Peixoto LM, Rosse IC, Júnior JBF, de Oliveira EC, Becker LK, Coelho DB. 12 weeks of resistance training with progressive intensity improves the diagnostic parameters of sarcopenia in individuals of advanced age. Geriatr Nurs 2023; 54:60-65. [PMID: 37703691 DOI: 10.1016/j.gerinurse.2023.08.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 08/15/2023] [Accepted: 08/17/2023] [Indexed: 09/15/2023]
Abstract
OBJECTIVE The objective of this study was to evaluate the effects of 12 weeks of resistance training (RT) with progressive intensity on factors associated with sarcopenia in older individuals. METHODS A cross-sectional study was conducted with 74 participants (64.27 ± 7.06-y-old) who were divided into a control group (n = 37) and an intervention group (n = 37). The intervention group underwent 12 weeks of RT three times a week, with an initial training of 60% and final training of 85% of one-repetition maximum (1RM). Both groups were evaluated before and after the 12-week training period to assess improvements in strength and physical performance. RESULTS The intervention group showed an increase in physical performance, as evidenced by a reduction in the time to perform the Timed Up and Go (TUG) test (p < 0.01) and the Five Times Sit to Stand Test (p < 0.01). Furthermore, the RT proved to be efficient for increasing hand grip and overall muscular strength, as confirmed through the 1RM test. However, the muscle mass index (MMI) and walking speed did not show any significant alterations in both groups. CONCLUSIONS In conclusion, 12 weeks of RT with progressive intensity has a positive effect on the diagnostic parameters of sarcopenia, leading to improvements in physical performance and muscular strength while maintaining the MMI.
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Affiliation(s)
- Ana Carolina Silva
- School of Nutrition and Postgraduate Program in Health and Nutrition, Federal University of Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | - Milton Amaral Pereira
- Exercise Physiology Laboratory - School of Physical Education, Federal University of Ouro Preto, Minas Gerais, Brazil
| | - Lilian Maria Peixoto
- School of Nutrition and Postgraduate Program in Health and Nutrition, Federal University of Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | - Izinara Cruz Rosse
- School of Phamarcy, Federal University of Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | | | - Emerson Cruz de Oliveira
- School of Physical Education and Postgraduate Program in Health and Nutrition, Federal University of Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | - Lenice Kappes Becker
- School of Physical Education and Postgraduate Program in Health and Nutrition, Federal University of Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | - Daniel Barbosa Coelho
- School of Physical Education and Postgraduate Program in Health and Nutrition, Federal University of Ouro Preto, Ouro Preto, Minas Gerais, Brazil.
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Matosinho CGR, Fonseca PADS, Peixoto MGCD, Rosse IC, Lopes FCF, Zózimo T, Filho AEV, Bruneli FÂT, Carvalho MRS, Gama MAS. Phenotypic variation in milk fatty acid composition and its association with stearoyl-CoA desaturase 1 (SCD1) gene polymorphisms in Gir cows. J Anim Breed Genet 2023; 140:532-548. [PMID: 37186480 DOI: 10.1111/jbg.12777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 03/12/2023] [Accepted: 04/10/2023] [Indexed: 05/17/2023]
Abstract
Individual variation in milk fatty acid (FA) composition has been partially attributed to stearoyl-CoA desaturase 1 (SCD1) gene polymorphisms in taurine breeds, but much less is known for Zebu breeds. This study investigated the phenotypic variation in milk FA composition, and the influence of SCD1 variants on this trait and on milk fat desaturase indices (DI) in Gir cows. The functional impact of SCD1 variants was predicted using bioinformatics tools. Milk and blood samples were collected from 312 cows distributed in 10 herds from five states of Brazil. SCD1 variants were identified through target sequencing, and milk FA composition was determined by gas chromatography. Phenotypic variation in milk FA composition fell within the range reported for taurine breeds, with SCD18 index showing the lowest variation among the DI. Fourteen SCD1 variants were identified, six of which not previously described. Regarding the A293V polymorphism, all cows were homozygous for the C allele (coding for alanine), whereas all genotypes were detected for the second SNP affecting the 293 codon (G > A), with compelling evidence for functional effects. Significant associations (based on raw p-values) were found between this SNP and C12:0, cis-9, trans-11 CLA and short-chain FA, and between another SNP (rs523411937) and C15:0 and odd-chain linear FA. A new SNP on Chr26:21277069 was associated with trans-11 C18:1, cis-9, trans-11 CLA, C18:3 n-3 and n-3 FA. These findings indicate that SCD1 polymorphisms also contributes to the phenotypic variation in milk FA composition of Gir cows, with potential use in their breeding programmes.
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Affiliation(s)
- Carolina Guimarães Ramos Matosinho
- Departamento de Genética, Ecologia e Evolução, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Pablo Augusto de Souza Fonseca
- Centre for Genetic Improvement of Livestock, Department of Animal Biosciences, University of Guelph, Guelph, Ontario, Canada
| | | | - Izinara Cruz Rosse
- Departamento de Farmácia, Escola de Farmácia, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil
| | | | - Thalia Zózimo
- Departamento de Genética, Ecologia e Evolução, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Aníbal Eugênio Vercesi Filho
- Agência Paulista de Tecnologia dos Agronegócios e diretor do Laboratório de Biotecnologia do Instituto de Zootecnia do Governo do Estado de São Paulo, São Paulo, SP, Brazil
| | | | - Maria Raquel Santos Carvalho
- Departamento de Genética, Ecologia e Evolução, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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Damasceno S, Fonseca PADS, Rosse IC, Moraes MFD, de Oliveira JAC, Garcia-Cairasco N, Brunialti Godard AL. Putative Causal Variant on Vlgr1 for the Epileptic Phenotype in the Model Wistar Audiogenic Rat. Front Neurol 2021; 12:647859. [PMID: 34177758 PMCID: PMC8220163 DOI: 10.3389/fneur.2021.647859] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 05/14/2021] [Indexed: 11/13/2022] Open
Abstract
Wistar Audiogenic Rat is an epilepsy model whose animals are predisposed to develop seizures induced by acoustic stimulation. This model was developed by selective reproduction and presents a consistent genetic profile due to the several generations of inbreeding. In this study, we performed an analysis of WAR RNA-Seq data, aiming identified at genetic variants that may be involved in the epileptic phenotype. Seventeen thousand eighty-five predicted variants were identified as unique to the WAR model, of which 15,915 variants are SNPs and 1,170 INDELs. We filter the predicted variants by pre-established criteria and selected five for validation by Sanger sequencing. The genetic variant c.14198T>C in the Vlgr1 gene was confirmed in the WAR model. Vlgr1 encodes an adhesion receptor that is involved in the myelination process, in the development of stereocilia of the inner ear, and was already associated with the audiogenic seizures presented by the mice Frings. The transcriptional quantification of Vlgr1 revealed the downregulation this gene in the corpus quadrigeminum of WAR, and the protein modeling predicted that the mutated residue alters the structure of a domain of the VLGR1 receptor. We believe that Vlgr1 gene may be related to the predisposition of WAR to seizures and suggest the mutation Vlgr1/Q4695R as putative causal variant, and the first molecular marker of the WAR strain.
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Affiliation(s)
- Samara Damasceno
- Departamento de Genética, Ecologia e Evolução, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Pablo Augusto de Souza Fonseca
- Departamento de Genética, Ecologia e Evolução, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Izinara Cruz Rosse
- Departamento de Farmácia, Escola de Farmácia, Universidade Federal de Ouro Preto, Ouro Preto, Brazil
| | - Márcio Flávio Dutra Moraes
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | | | - Norberto Garcia-Cairasco
- Departamento de Fisiologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Ana Lúcia Brunialti Godard
- Departamento de Genética, Ecologia e Evolução, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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Pimentel JDSM, Ludwig S, Resende LC, Brandão-Dias PFP, Pereira AH, de Abreu NL, Rosse IC, Martins APV, Facchin S, Lopes JDM, Santos GB, Alves CBM, Kalapothakis E. Genetic evaluation of migratory fish: Implications for conservation and stocking programs. Ecol Evol 2020; 10:10314-10324. [PMID: 33072261 PMCID: PMC7548202 DOI: 10.1002/ece3.6231] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 12/09/2019] [Accepted: 02/19/2020] [Indexed: 02/04/2023] Open
Abstract
Fish stocking programs have been implemented to mitigate the blockage of original riverbeds by the construction of hydropower dams, which affects the natural migration of fish populations. However, this method raises concerns regarding the genetic rescue of the original populations of migratory fish species. We investigated the spatial distribution of genetic properties, such as genetic diversity, population structure, and gene flow (migration), of the Neotropical migratory fish Prochilodus costatus in the Três Marias dam in the São Francisco River basin, Brazil, and examined the possible effects of fish stocking programs on P. costatus populations in this region. In total, 1,017 specimens were sampled from 12 natural sites and a fish stocking program, and genotyped for high‐throughput sequencing at 8 microsatellite loci. The populations presented low genetic variability, with evidence of inbreeding and the presence of only four genetic pools; three pools were observed throughout the study region, and the fourth was exclusive to one area in the Paraopeba River. Additionally, we identified high unidirectional gene flow between regions, and a preferred migratory route between the Pará River and the upper portion of the São Francisco River. The fish stocking program succeeded in transposing the genetic pools from downstream to upstream of the Três Marias dam, but, regrettably, promoted genetic homogenization in the upper São Francisco River basin. Moreover, the data show the fragility of this species at the genetic level. This monitoring strategy could be a model for the development of conservation and management measures for migratory fish populations that are consumed by humans.
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Affiliation(s)
- Juliana da Silva Martins Pimentel
- Department of Genetic, Ecology and Evolution Institute of Biological Sciences Federal University of Minas Gerais Belo Horizonte Brazil.,Pitágoras College Belo Horizonte Brazil
| | - Sandra Ludwig
- Department of Genetic, Ecology and Evolution Institute of Biological Sciences Federal University of Minas Gerais Belo Horizonte Brazil.,Department of Zoology Institute of Biological Sciences Federal University of Minas Gerais Belo Horizonte Brazil
| | - Leonardo Cardoso Resende
- Department of Genetic, Ecology and Evolution Institute of Biological Sciences Federal University of Minas Gerais Belo Horizonte Brazil
| | - Pedro Ferreira Pinto Brandão-Dias
- Department of Genetic, Ecology and Evolution Institute of Biological Sciences Federal University of Minas Gerais Belo Horizonte Brazil
| | - Adriana Heloísa Pereira
- Department of Genetic, Ecology and Evolution Institute of Biological Sciences Federal University of Minas Gerais Belo Horizonte Brazil
| | - Nazaré Lúcio de Abreu
- Department of Genetic, Ecology and Evolution Institute of Biological Sciences Federal University of Minas Gerais Belo Horizonte Brazil
| | - Izinara Cruz Rosse
- Department of Genetic, Ecology and Evolution Institute of Biological Sciences Federal University of Minas Gerais Belo Horizonte Brazil.,Department of Pharmacy Federal University of Ouro Preto Ouro Preto Brazil
| | - Ana Paula Vimieiro Martins
- Department of Genetic, Ecology and Evolution Institute of Biological Sciences Federal University of Minas Gerais Belo Horizonte Brazil
| | - Susanne Facchin
- Department of Genetic, Ecology and Evolution Institute of Biological Sciences Federal University of Minas Gerais Belo Horizonte Brazil
| | | | | | | | - Evanguedes Kalapothakis
- Department of Genetic, Ecology and Evolution Institute of Biological Sciences Federal University of Minas Gerais Belo Horizonte Brazil
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Coelho DB, Pimenta E, Rosse IC, Veneroso C, Pussieldi G, Becker LK, Carvalho MR, Silami-Garcia E. Angiotensin-converting enzyme (ACE-I/D) polymorphism frequency in Brazilian soccer players. Appl Physiol Nutr Metab 2016; 41:692-4. [PMID: 27232187 DOI: 10.1139/apnm-2015-0514] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This study aimed to analyze the angiotensin-converting enzyme (ACE-I/D) allelic and genotypic frequencies in Brazilian soccer players of different ages. The study group comprised 353 players from first-division clubs in the under (U)-14, U-15, U-17, U-20, and professional categories. The allelic and genotypic frequencies did not differ significantly in any of the categories between the group of players and the control group. This was the first study of ACE-I/D polymorphism in Brazilian soccer players.
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Affiliation(s)
- Daniel Barbosa Coelho
- a Sports Center, Federal University of Ouro Preto, CEP-35400-000 Minas Gerais, Brazil
| | - Eduardo Pimenta
- b Physical Education Department, School of Physical Education, Physiotherapy, and Occupational Therapy, Federal University of Minas Gerais, CEP-31270-901, Minas Gerais, Brazil
| | - Izinara Cruz Rosse
- c Laboratory of Human and Medical Genetics, Department of General Biology - Institute of Biological Sciences - CEP-31270-901, Federal University of Minas Gerais, Brazil
| | - Christiano Veneroso
- e Physical Education Department, Federal University of Maranhão, CEP-65080-805, São Luís, Brazil
| | - Guilherme Pussieldi
- d Physical Education Department, Federal University of Viçosa - Campus Florestal, CEP-35690-000 Florestal, Minas Gerais, Brazil
| | - Lenice Kapes Becker
- a Sports Center, Federal University of Ouro Preto, CEP-35400-000 Minas Gerais, Brazil
| | - Maria-Raquel Carvalho
- c Laboratory of Human and Medical Genetics, Department of General Biology - Institute of Biological Sciences - CEP-31270-901, Federal University of Minas Gerais, Brazil
| | - Emerson Silami-Garcia
- e Physical Education Department, Federal University of Maranhão, CEP-65080-805, São Luís, Brazil
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Fonseca PAS, Rosse IC, Demiranda M, Machado MA, Verneque RS, Peixoto MGCD, Carvalho MRS. A new tetra-primer ARMS-PCR for genotyping bovine kappa-casein polymorphisms. Genet Mol Res 2013; 12:6521-6. [PMID: 24390998 DOI: 10.4238/2013.december.11.3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Kappa-casein (κ-casein) is one of the most abundant milk proteins. Its main function is to avoid the aggregation of casein micelles, keeping them, and therefore calcium phosphate, in pockets in solution. In bovines, a κ-casein functional polymorphism has been associated with fat, calcium, and protein milk contents and faster curd contraction in cheese production. Quicker curd contraction reduces the loss of milk solids, enhancing cheese yield. This polymorphism induces a double amino acid substitution (Thr136Ile and Ala148Asp). The polymorphism is normally detected by PCR-RFLP, which is a laborious method. An interesting methodological alternative is the tetra-primer amplification refractory mutation system PCR (tetra-primer ARMS-PCR). A tetra-primer ARMS-PCR for the detection of this κ-casein polymorphism has been described. However, specificity was not achieved, probably due to problems with primer design. We developed a new tetra-primer ARMS-PCR for the detection of the κ-casein polymorphism. This new method was validated in a double-blind test, by comparison with the results obtained for 50 Guzerá bulls formerly genotyped by PCR-RFLP. This new method achieved 100% sensitivity and specificity. We conclude that this method is a useful, cost-efficient alternative for the detection of functional κ-casein polymorphisms.
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Affiliation(s)
- P A S Fonseca
- Departamento de Biologia Geral, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
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