1
|
Castro PHC, Paiva ALB, Peixoto GVM, Oliveira-Mendes BBR, Calaça P, Matavel A. Epidemiology of arthropods envenomation in Brazil: a public health issue. AN ACAD BRAS CIENC 2023; 95:e20220850. [PMID: 37466539 DOI: 10.1590/0001-3765202320220850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 01/04/2023] [Indexed: 07/20/2023] Open
Abstract
Brazil is located between the Equator and Tropic of Capricorn, which allows diverse climates, reliefs, and habitats for arthropods, which sting represents a risk to human health and a public health issue. This manuscript updates the epidemiological data of cases of human envenoming by spiders, scorpions, and insects with medical relevance in Brazil from 2010 to 2021. Epidemiological data were taken using the Brazilian Notifiable Diseases Information System. Statistics of non-parametric data used the Kruskal-Wallis followed by the Nemenyi test. On average, more than 145,000 envenomation and 145 deaths are recorded annually, and more than 60% of deaths are caused by scorpion bites. When the number of deaths was pondered by the number of cases with each arthropod, bees kill the most. Most stings cause mild symptoms and affect men of working age. The incidence decreases during the colder months, which is better noticeable in regions with well-defined seasons. The distribution is distinct among the regions: Southeast, Northeast, and South have the highest rate of bites. The growing number of cases of envenomation reported annually is a serious public health concern, especially involving scorpions, and highlights the importance of studying arthropod venom and improving the therapies.
Collapse
Affiliation(s)
- Pedro Henrique C Castro
- Fundação Ezequiel Dias, Diretoria de Pesquisa e Desenvolvimento, Rua Conde Pereira Carneiro, 80, Gameleira, 30510-010 Belo Horizonte, MG, Brazil
| | - Ana Luiza B Paiva
- Fundação Ezequiel Dias, Diretoria de Pesquisa e Desenvolvimento, Rua Conde Pereira Carneiro, 80, Gameleira, 30510-010 Belo Horizonte, MG, Brazil
| | - Gustavo Vinícius M Peixoto
- Fundação Ezequiel Dias, Diretoria de Pesquisa e Desenvolvimento, Rua Conde Pereira Carneiro, 80, Gameleira, 30510-010 Belo Horizonte, MG, Brazil
| | | | - Paula Calaça
- Fundação Ezequiel Dias, Diretoria de Pesquisa e Desenvolvimento, Rua Conde Pereira Carneiro, 80, Gameleira, 30510-010 Belo Horizonte, MG, Brazil
| | - Alessandra Matavel
- Fundação Ezequiel Dias, Diretoria de Pesquisa e Desenvolvimento, Rua Conde Pereira Carneiro, 80, Gameleira, 30510-010 Belo Horizonte, MG, Brazil
| |
Collapse
|
2
|
Peigneur S, Paiva ALB, Cordeiro MN, Borges MH, Diniz MRV, de Lima ME, Tytgat J. Phoneutria nigriventer Spider Toxin PnTx2-1 (δ-Ctenitoxin-Pn1a) Is a Modulator of Sodium Channel Gating. Toxins (Basel) 2018; 10:toxins10090337. [PMID: 30134593 PMCID: PMC6162791 DOI: 10.3390/toxins10090337] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 08/15/2018] [Accepted: 08/16/2018] [Indexed: 01/31/2023] Open
Abstract
Spider venoms are complex mixtures of biologically active components with potentially interesting applications for drug discovery or for agricultural purposes. The spider Phoneutria nigriventer is responsible for a number of envenomations with sometimes severe clinical manifestations in humans. A more efficient treatment requires a comprehensive knowledge of the venom composition and of the action mechanism of the constituting components. PnTx2-1 (also called δ-ctenitoxin-Pn1a) is a 53-amino-acid-residue peptide isolated from the venom fraction PhTx2. Although PnTx2-1 is classified as a neurotoxin, its molecular target has remained unknown. This study describes the electrophysiological characterization of PnTx2-1 as a modulator of voltage-gated sodium channels. PnTx2-1 is investigated for its activity on seven mammalian NaV-channel isoforms, one insect NaV channel and one arachnid NaV channel. Furthermore, comparison of the activity of both PnTx2-1 and PnTx2-6 on NaV1.5 channels reveals that this family of Phoneutria toxins modulates the cardiac NaV channel in a bifunctional manner, resulting in an alteration of the inactivation process and a reduction of the sodium peak current.
Collapse
Affiliation(s)
- Steve Peigneur
- Toxicology and Pharmacology, University of Leuven (KU Leuven), Campus Gasthuisberg, P.O. Box 922, Herestraat 49, 3000 Leuven, Belgium.
- Laboratório de Venenos e Toxinas Animais, Dept de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte 31270-901, Brazil.
| | - Ana Luiza B Paiva
- Departamento de Pesquisa e Desenvolvimento, Fundação Ezequiel Dias, Minas Gerais, Belo Horizonte 30510-010, Brazil.
| | - Marta N Cordeiro
- Departamento de Pesquisa e Desenvolvimento, Fundação Ezequiel Dias, Minas Gerais, Belo Horizonte 30510-010, Brazil.
| | - Márcia H Borges
- Departamento de Pesquisa e Desenvolvimento, Fundação Ezequiel Dias, Minas Gerais, Belo Horizonte 30510-010, Brazil.
| | - Marcelo R V Diniz
- Departamento de Pesquisa e Desenvolvimento, Fundação Ezequiel Dias, Minas Gerais, Belo Horizonte 30510-010, Brazil.
| | - Maria Elena de Lima
- Laboratório de Venenos e Toxinas Animais, Dept de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte 31270-901, Brazil.
- Programa de Pós-graduação em Ciências da Saúde, Biomedicina e Medicina, Instituto de Ensino e Pesquisa da Santa Casa de Belo Horizonte, Grupo Santa Casa de Belo Horizonte, Minas Gerais, Belo Horizonte 31270-901, Brazil.
| | - Jan Tytgat
- Toxicology and Pharmacology, University of Leuven (KU Leuven), Campus Gasthuisberg, P.O. Box 922, Herestraat 49, 3000 Leuven, Belgium.
| |
Collapse
|
3
|
Diniz MR, Machado CR, Mudado MA, Paiva ALB. 257. Comparative Analysis of Transcriptomes of Phoneutria pertyi and P. nigriventer Venom Glands. Toxicon 2012. [DOI: 10.1016/j.toxicon.2012.04.258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
4
|
Abstract
To evaluate genetic variability in Pimelodus maculatus, a small migratory catfish common in South America, we isolated and characterized several microsatellite markers from individuals collected from a population in the River Grande (Brazil). A total of 11 loci were obtained and analyzed. All the loci were polymorphic, with the number of alleles ranging from three to 27 per locus. Observed and expected heterozygosities ranged from 0.5 to 0.89 and from 0.53 to 0.95, respectively. These polymorphic markers can be used as effective tools to study the genetic structure in populations of this species.
Collapse
Affiliation(s)
- Ana Luiza B Paiva
- Departamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil
| | | |
Collapse
|