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dos Santos AG, Souza JFDSE, Soares SC, Nakayama CM, Feldberg E. Chromosomal characterization of three species of Serrasalmini (Serrasalmidae: Characiformes). Genet Mol Biol 2023; 46:e20230088. [PMID: 37992304 PMCID: PMC10664975 DOI: 10.1590/1678-4685-gmb-2023-0088] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 10/10/2023] [Indexed: 11/24/2023] Open
Abstract
The tribe Serrasalmini is a diverse group with paraphyletic genera and taxonomic uncertainties. Several studies have been carried out in this group of fish in order to understand this problem, including the cytogenetic approach. In this study, three species of a clade of Serrasalmini were characterized cytogenetically - Pristobrycon striolatus, Catoprion absconditus and Pygopristis denticulatus. The three species presented diploid number (2n) equal to 62 chromosomes, of one and two arms, with karyotypic formulas and species-specific fundamental numbers. Heterochromatin is centromeric and terminal (bi-telomeric) in most chromosomes, with a conspicuous interstitial block at pair 1 (m) in all three species. The nucleolar organizer regions were multiple and C-band positive, and their location was confirmed via 18S ribosomal DNA mapping; however, with additional sites. The 5S rDNA was located in interstitial region of long arm of pair 1 (m), in the three species (homeologous). Moreover, we observed synteny between 18S and 5S in the species C. absconditus and P. denticulatus, which, according to fiber-FISH, are interspersed. Thus, the maintenance of 2n (62) evidences the diversification of chromosomal formulas within the clade by non-Robertsonian rearrangements and reflects the paraphyly of the related species.
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Affiliation(s)
- Alan Gomes dos Santos
- Instituto Nacional de Pesquisas da Amazônia (INPA), Programa de
Pós-graduação em Genética, Conservação e Biologia Evolutiva, Laboratório de Genética
Animal, Manaus, AM, Brazil
| | - José Francisco de Sousa e Souza
- Instituto Nacional de Pesquisas da Amazônia (INPA), Programa de
Pós-graduação em Genética, Conservação e Biologia Evolutiva, Laboratório de Genética
Animal, Manaus, AM, Brazil
| | - Simone Cardoso Soares
- Instituto Nacional de Pesquisas da Amazônia (INPA), Programa de
Pós-graduação em Genética, Conservação e Biologia Evolutiva, Laboratório de Genética
Animal, Manaus, AM, Brazil
| | - Celeste Mutuko Nakayama
- Instituto Nacional de Pesquisas da Amazônia (INPA), Coordenação de
Biodiversidade, Laboratório de Genética Animal, Manaus, AM, Brazil
| | - Eliana Feldberg
- Instituto Nacional de Pesquisas da Amazônia (INPA), Programa de
Pós-graduação em Genética, Conservação e Biologia Evolutiva, Laboratório de Genética
Animal, Manaus, AM, Brazil
- Instituto Nacional de Pesquisas da Amazônia (INPA), Coordenação de
Biodiversidade, Laboratório de Genética Animal, Manaus, AM, Brazil
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Soares SC, Eler ES, E Silva CEF, da Silva MNF, Araújo NP, Svartman M, Feldberg E. LINE-1 and SINE-B1 mapping and genome diversification in Proechimys species (Rodentia: Echimyidae). Life Sci Alliance 2022; 5:5/6/e202101104. [PMID: 35304430 PMCID: PMC8932440 DOI: 10.26508/lsa.202101104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 02/25/2022] [Accepted: 02/28/2022] [Indexed: 11/24/2022] Open
Abstract
This study aimed to understand the impact of LINE-1 and SINE-B1 retroelements on the architecture and karyotypic diversification of five rodent species of the genus Proechimys from different regions of the Amazon. Karyotype comparisons were performed using fluorescent interspecific in situ hybridization. The L1 and B1 retroelements showed a non-random arrangement and a conserved pattern when the genomes of the five species of Proechimys were compared, including the two cytotypes of Proechimys guyannensis The signal homeology among the chromosomes and the degree of similarity among the formed clusters indicate rearrangements such as fusion/fission, and demonstrates that these retroelements can behave as derived characters shared in Proechimys The differentiated distribution and organization of these retroelements in the karyotypes and in the chromosomal fiber, respectively, may represent a strong indication of their role as generating sources of karyotypic diversity in the genus Proechimys and provide insights into the evolutionary relationships between taxa.
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Affiliation(s)
- Simone Cardoso Soares
- Pós-Graduação em Genética, Conservação e Biologia Evolutiva, Instituto Nacional de Pesquisas da Amazônia, Manaus, Brazil .,Laboratório de Genética Animal (LGA), Instituto Nacional de Pesquisas da Amazônia, Manaus, Brazil.,Universidade do Estado do Amazonas, Manaus, Brazil
| | - Eduardo Schmidt Eler
- Pós-Graduação em Genética, Conservação e Biologia Evolutiva, Instituto Nacional de Pesquisas da Amazônia, Manaus, Brazil
| | - Carlos Eduardo Faresin E Silva
- Pós-Graduação em Genética, Conservação e Biologia Evolutiva, Instituto Nacional de Pesquisas da Amazônia, Manaus, Brazil.,Laboratório de Genética Animal (LGA), Instituto Nacional de Pesquisas da Amazônia, Manaus, Brazil
| | | | - Naiara Pereira Araújo
- Departamento de Genética, Ecologia e Evolução, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,Instituto Federal de Educação, Ciência e Tecnologia de Rondônia campus Jaru, Jaru, Brazil
| | - Marta Svartman
- Departamento de Genética, Ecologia e Evolução, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Eliana Feldberg
- Pós-Graduação em Genética, Conservação e Biologia Evolutiva, Instituto Nacional de Pesquisas da Amazônia, Manaus, Brazil.,Laboratório de Genética Animal (LGA), Instituto Nacional de Pesquisas da Amazônia, Manaus, Brazil
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Pereira UP, Soares SC, Blom J, Leal CAG, Ramos RTJ, Guimarães LC, Oliveira LC, Almeida SS, Hassan SS, Santos AR, Miyoshi A, Silva A, Tauch A, Barh D, Azevedo V, Figueiredo HCP. In silico prediction of conserved vaccine targets in Streptococcus agalactiae strains isolated from fish, cattle, and human samples. Genet Mol Res 2013; 12:2902-12. [PMID: 24065646 DOI: 10.4238/2013.august.12.6] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Streptococcus agalactiae (Lancefield group B; group B streptococci) is a major pathogen that causes meningoencephalitis in fish, mastitis in cows, and neonatal sepsis and meningitis in humans. The available prophylactic measures for conserving human and animal health are not totally effective and have limitations. Effective vaccines against the different serotypes or genotypes of pathogenic strains from the various hosts would be useful. We used an in silico strategy to identify conserved vaccine candidates in 15 genomes of group B streptococci strains isolated from human, bovine, and fish samples. The degree of conservation, subcellular localization, and immunogenic potential of S. agalactiae proteins were investigated. We identified 36 antigenic proteins that were conserved in all 15 genomes. Among these proteins, 5 and 23 were shared only by human or fish strains, respectively. These potential vaccine targets may help develop effective vaccines that will help prevent S. agalactiae infection.
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Affiliation(s)
- U P Pereira
- AQUAVET - Laboratório de Doenças de Animais Aquáticos, Departamento de Medicina Veterinária Preventiva, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
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Soares SC, Dorella FA, Pacheco LGC, Hirata R, Mattos-Guaraldi AL, Azevedo V, Miyoshi A. Plasticity of Corynebacterium diphtheriae pathogenicity islands revealed by PCR. Genet Mol Res 2011; 10:1290-4. [PMID: 21732292 DOI: 10.4238/vol10-2gmr1211] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Despite the existence of a vaccine against diphtheria, this disease remains endemic and is reemerging in several regions due to many factors, including variations in genes coding for virulence factors. One common feature of virulence factors is their high concentration in pathogenicity islands (PAIs), very unstable regions acquired via horizontal gene transfer, which has lead to the emergence of various bacterial pathogens. The 13 putative PAIs in Corynebacterium diphtheriae NCTC 13129 and the reemergence of this disease point to the great variability in the PAIs of this species, which may reflect on bacterial life style and physiological versatility. We investigated the relationships between the large number of PAIs in C. diphtheriae and the possible implications of their plasticity in virulence. The GenoFrag software was used to design primers to analyze the genome plasticity of two pathogenicity islands of the reference strain (PiCds 3 and 8) in 11 different strains. We found that PiCd 3 was absent in only two strains, showing genes playing putative important roles in virulence and that only one strain harbored PiCd 8, due to its location in a putative "hotspot" for horizontal gene transfer events.
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Affiliation(s)
- S C Soares
- Departamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
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Soares SC, Abé-Sandes K, Nascimento Filho VB, Nunes FMF, Silva WA. Genetic polymorphisms in TLR4, CR1 and Duffy genes are not associated with malaria resistance in patients from Baixo Amazonas region, Brazil. Genet Mol Res 2008; 7:1011-9. [PMID: 19048480 DOI: 10.4238/vol7-4gmr439] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The main purpose of this research was to analyze the relation of the genetic polymorphisms frequently expressed by antigen-presenting cells, erythrocytes and malaria susceptibility/resistance with the human malaria infection cases. The sample used consisted of 23 Plasmodium vivax (Pv)- and P. falciparum (Pf)-infected patients, and 21 healthy individuals as a control group, from the Baixo Amazonas population in Pará, Brazil. The Asp299Gly polymorphisms in the Toll-like receptor 4 (TLR4), and Gly42Asp, Arg89Cys, Ala100Thr, and T-33C in the Duffy gene (FY) were analyzed by restriction fragment length polymorphism-polymerase chain reaction. The Lys1590Glu and Arg1601Gly polymorphisms in the complement receptor type 1 (CR1) were analyzed by DNA sequencing. According to the results obtained and statistical analysis considering a significance level or alpha = 0.01, we conclude that the low heterozygote frequency (2.27%) for the Asp299Gly mutation, detected in the TLR4 gene, is not related to the Pv and Pf infections in the patients analyzed. Also, the promoter region GATA-1 analysis of the FY gene in the Pv-infected patients showed that the heterozygote frequency for the T-33C mutation (11.36% of the infected patients and 20.45% of the control patients) is not related to infection resistance. Regarding the CR1 gene, the observed heterozygote frequency (9.09%) for the Arg1601Gly mutation in Pf-infected patients when compared to heterozygote frequency in the control group (18.18%) suggests that there is no correlation with infection resistance.
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Affiliation(s)
- S C Soares
- Departamento de Clínica Médica, Faculdade de Medicina, Universidade de São Paulo, Ribeirão Preto, SP, Brasil.
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Soares SC, Fratelli N, Prefumo F, Bhide A, Thilaganathan B. First-trimester uterine artery Doppler and spontaneous preterm delivery. Ultrasound Obstet Gynecol 2007; 29:146-9. [PMID: 17219368 DOI: 10.1002/uog.3919] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
OBJECTIVES To assess the relationship between first-trimester uterine artery Doppler measurements and spontaneous preterm delivery. METHODS This was a retrospective analysis of uterine artery Doppler findings at 11-14 weeks in 73 singleton pregnancies with spontaneous preterm labor and 2417 pregnancies delivered at term. RESULTS The uterine artery mean resistance index (RI) was 0.68 (coefficient of variation 19%) and 0.69 (17%) in the preterm and term delivery groups, respectively (P = 0.35). The mean pulsatility index (PI) was 1.42 (39%) and 1.42 (46%) in the term and preterm delivery groups, respectively (P = 0.95). Bilateral diastolic notches were present in 34% of preterm deliveries and 33% of controls (P = 0.84). Restricting the analysis to the 19 pregnancies with preterm delivery before 34 weeks of gestation, no significant difference from controls was observed for RI (mean 0.71, coefficient of variation 11%, P = 0.41), PI (mean 1.56, coefficient of variation 29%, P = 0.27) or the number of bilateral notches (42%, P = 0.41). CONCLUSIONS Despite pathological evidence suggesting that defective placentation is associated with spontaneous preterm delivery, first trimester uterine artery resistance, as assessed by Doppler ultrasound investigation, is not different in pregnancies subsequently complicated by preterm labor compared to pregnancies delivered at term. This finding may be explained by a late failure of trophoblast development in cases destined to deliver preterm.
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Affiliation(s)
- S C Soares
- Fetal Medicine Unit, Academic Department of Obstetrics and Gynaecology, St George's Hospital Medical School, London, UK
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Prefumo F, Fratelli N, Soares SC, Thilaganathan B. Uterine artery Doppler velocimetry at 11-14 weeks in singleton pregnancies conceived by assisted reproductive technology. Ultrasound Obstet Gynecol 2007; 29:141-5. [PMID: 17072900 DOI: 10.1002/uog.3842] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
OBJECTIVE Singleton pregnancies resulting from assisted reproductive technologies (ART) have an increased risk of preterm delivery, pre-eclampsia and intrauterine growth restriction. The aim of the present study was to determine whether first-trimester trophoblastic invasion, as assessed by uterine artery Doppler velocimetry, is different in singleton pregnancies resulting from ART compared to those conceived naturally. METHODS Case-control study on 31 singleton ART pregnancies (26 in-vitro fertilization-embryo transfer, five intracytoplasmic sperm injection) and 62 matched pregnancies conceived spontaneously. Doppler velocimetry was performed at 11-14 weeks of gestation. RESULTS The mean resistance index (coefficient of variation) was 0.70 (17%) and 0.70 (18%) in ART and controls, respectively (P = 0.92). The corresponding values for mean pulsatility index were 1.40 (44%) and 1.47 (44%) in ART and controls, respectively (P = 0.58). Pregnancies with no, unilateral or bilateral diastolic notches were 48%, 26%, 26% and 36%, 37%, 27%, in ART and controls, respectively (P = 0.43). CONCLUSION There are no differences in uterine artery Doppler indices between pregnancies obtained by invasive ART and naturally conceived matched controls. This finding suggests that there is no major difference in trophoblastic invasion of the maternal spiral arteries between ART and spontaneous pregnancies.
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Affiliation(s)
- F Prefumo
- Fetal Medicine Unit, Department of Clinical Developmental Sciences, St. George's, University of London, London, UK.
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Waitzberg DL, Bellinati-Pires R, Yamaguchi N, Massili-Oku S, Salgado MM, Hypolito IP, Soares SC, Goncalves EL, Furst P. Influence of medium-chain triglyceride-based lipid emulsion on rat polymorphonuclear cell functions. Nutrition 1996; 12:93-9. [PMID: 8724379 DOI: 10.1016/0899-9007(96)90706-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Intravenous lipid emulsions are used as energy and essential fatty acids sources. There are controversial reports postulating in vitro and in vivo inhibitory effects of long-chain triglycerides (LCT) upon the blood polymorphonuclear leukocytes (PMNL) functions. In the present study the in vivo and in vitro effects of LCT and a physical mixture of medium- and long-chain triglycerides (MCT/LCT) emulsions were investigated on select PMNL functions, i.e., chemotaxis, phagocytosis, and bacterial killing. Blood from 20 rats was incubated with LCT, MCT, MCT/LCT, and saline, respectively. MCT-containing emulsions exhibited an inhibitory effect on all PMNL functions investigated, whereas LCT exerted an effect on the phagocytic index only. The administration of a parenteral supply of LCT, MCT/LCT, and saline for 30 h followed by saline infusion for 14 h in discontinuous mode did not influence any of the investigated PMNL functions. Similarly, continuous infusion over 44 h at increasing infusion rates up to 1.5 mL/h did not affect the PMNL functions. The obvious difference between in vitro and in vivo response of the PMNL model emphasizes the necessity for continuous monitoring of in vivo conditions. Appropriate interpretation of the data requires continuous circumspection and consideration of trials in a clinical setting.
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Affiliation(s)
- D L Waitzberg
- Department of Surgery, University of Sao Paulo Medical School, Brazil
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