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Christoff RR, Liesner IL, Gavino-Leopoldino D, Andrade B, Oliveira de Campos B, Salgado I, Simões-Lemos F, Da Poian AT, Assunção-Miranda I, Figueiredo CP, Clarke JR. TNF-α blockage prevents late neurological consequences of Zika virus infection in mice. Behav Brain Res 2024; 471:115114. [PMID: 38878972 DOI: 10.1016/j.bbr.2024.115114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 06/12/2024] [Accepted: 06/13/2024] [Indexed: 06/29/2024]
Abstract
Zika virus (ZIKV) is a neurotropic Orthoflavivirus that causes a myriad of neurological manifestations in newborns exposed in uterus. Despite the devastating consequences of ZIKV on the developing brain, strategies to prevent or treat the consequences of viral infection are not yet available. We previously showed that short-term treatment with the TNF-α neutralizing monoclonal antibody. Infliximab could prevent seizures at acute and chronic stages of ZIKV infection, but had no impact on long-term cognitive and motor dysfunction. Due to the central role of inflammation in ZIKV-neuropathology, we hypothesized that prolonged treatment with the anti-TNF-α monoclonal antibody Infliximab could provide complete rescue of long-term behavioral deficits associated with neonatal ZIKV infection in mice. Here, neonatal (post-natal day 3) Swiss mice were submitted to subcutaneous (s.c.) injection of 106 PFU of ZIKV or mock medium and were then treated with Infliximab (20 μg/day) or sterile saline intraperitoneally (i.p.), for 40 days starting on the day of infection, and behavioral assessment started at 60 days post-infection (dpi). Infliximab prevented ZIKV-induced cognitive and motor impairments in mice. In addition, microgliosis and cell death found in mice following ZIKV infection were partially reversed by TNF-α blockage. Altogether, these results suggest that TNF-α-mediated inflammation is central for late ZIKV-induced behavioral deficits and cell death and strategies targeting this cytokine may be promising approaches to treat subjects exposed to the virus during development.
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Affiliation(s)
- Raissa R Christoff
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, RJ, Brazil
| | - Isabelle L Liesner
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, RJ, Brazil
| | | | - Bruna Andrade
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, RJ, Brazil
| | | | - Isabella Salgado
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, RJ, Brazil
| | - Felipe Simões-Lemos
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, RJ, Brazil; Instituto Oswaldo Cruz, RJ, Brazil
| | - Andrea T Da Poian
- Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, RJ, Brazil
| | | | | | - Julia R Clarke
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, RJ, Brazil.
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Kandasamy R, Perianaika Matharasi Antonyraj A, Nainangu P, Sophiya M, Karuppasamy R, Nallusamy S, Ganapathy D, Dharumadurai D. Histological validation of in-vivo larvicidal efficacy of marine Streptomyces sp. RD06 secondary metabolites against filariasis causing Culex quinquefasciatus and statistical media optimization for larvicidal derivatives production. Acta Trop 2024; 255:107226. [PMID: 38697451 DOI: 10.1016/j.actatropica.2024.107226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2023] [Revised: 04/07/2024] [Accepted: 04/20/2024] [Indexed: 05/05/2024]
Abstract
Mosquito-borne disease pandemics, such as the Zika virus and chikungunya, have escalated cognizance of how critical it is to implement proficient mosquito vector control measures. The prevention of Culicidae is becoming more difficult these days because of the expeditious imminence of synthetic pesticide resistance and the universal expansion of tremendously invasive mosquito vectors. The present study highlights the insecticidal and larvicidal efficacy of the prospective novel actinobacterium derived from the marine Streptomyces sp. RD06 secondary metabolites against Culex quinquefasciatus mosquito. The pupicidal activity of Streptomyces sp. RD06 showed LC50=199.22 ± 11.54 and LC90= 591.84 ± 55.41 against the pupa. The purified bioactive metabolites 1, 2-Benzenedicarboxylic acid, diheptyl ester from Streptomyces sp. RD06 exhibited an LC50 value of 154.13 ± 10.50 and an LC90 value of 642.84 ± 74.61 tested against Cx. quinquefasciatus larvae. The Streptomyces sp. RD06 secondary metabolites exhibited 100 % non-hatchability at 62.5 ppm, and 82 % of hatchability was observed at 250 ppm. In addition, media optimization showed that the highest biomass production was attained at a temperature of 41.44 °C, pH 9.23, nitrogen source 11.43 mg/ml, and carbon source 150 mg/ml. Compared to control larvae, the histology and confocal microscopy results showed destruction to the anal gill, lumen content, and epithelial layer residues in the treated larvae. Utilizing an eco-friendly method, these alternative inventive insecticidal derivatives from Streptomyces sp. RD06 eradicates Culex quinquefasciatus. This study highlights the promising potential of these Streptomyces sp. RD06 secondary metabolites to develop affordable and efficacious mosquito larvicides to replace synthetic insecticides in the future.
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Affiliation(s)
- Rajesh Kandasamy
- Bioprocess Technology Laboratory, Department of Microbiology, Bharathidasan University, Tiruchirappalli, 620 024, Tamil Nadu, India; PG & Research Department of Microbiology, Sri Sankara Arts and Science College, Kanchipuram, 631561, Tamil Nadu, India
| | - Anahas Perianaika Matharasi Antonyraj
- Department of Research Analytics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, 600 077, Tamil Nadu, India
| | - Prasannabalaji Nainangu
- Bioprocess Technology Laboratory, Department of Microbiology, Bharathidasan University, Tiruchirappalli, 620 024, Tamil Nadu, India; PG & Research Department of Microbiology, Sri Sankara Arts and Science College, Kanchipuram, 631561, Tamil Nadu, India
| | - Mary Sophiya
- Bioprocess Technology Laboratory, Department of Microbiology, Bharathidasan University, Tiruchirappalli, 620 024, Tamil Nadu, India
| | | | | | - Dhanraj Ganapathy
- Department of Research Analytics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, 600 077, Tamil Nadu, India
| | - Dhanasekaran Dharumadurai
- Bioprocess Technology Laboratory, Department of Microbiology, Bharathidasan University, Tiruchirappalli, 620 024, Tamil Nadu, India.
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Phadungsombat J, Nakayama EE, Shioda T. Unraveling Dengue Virus Diversity in Asia: An Epidemiological Study through Genetic Sequences and Phylogenetic Analysis. Viruses 2024; 16:1046. [PMID: 39066210 PMCID: PMC11281397 DOI: 10.3390/v16071046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2024] [Revised: 06/25/2024] [Accepted: 06/27/2024] [Indexed: 07/28/2024] Open
Abstract
Dengue virus (DENV) is the causative agent of dengue. Although most infected individuals are asymptomatic or present with only mild symptoms, severe manifestations could potentially devastate human populations in tropical and subtropical regions. In hyperendemic regions such as South Asia and Southeast Asia (SEA), all four DENV serotypes (DENV-1, DENV-2, DENV-3, and DENV-4) have been prevalent for several decades. Each DENV serotype is further divided into multiple genotypes, reflecting the extensive diversity of DENV. Historically, specific DENV genotypes were associated with particular geographical distributions within endemic regions. However, this epidemiological pattern has changed due to urbanization, globalization, and climate change. This review comprehensively traces the historical and recent genetic epidemiology of DENV in Asia from the first time DENV was identified in the 1950s to the present. We analyzed envelope sequences from a database covering 16 endemic countries across three distinct geographic regions in Asia. These countries included Bangladesh, Bhutan, India, Maldives, Nepal, Pakistan, and Sri Lanka from South Asia; Cambodia, Laos, Myanmar, Thailand, and Vietnam from Mainland SEA; and Indonesia, the Philippines, Malaysia, and Singapore from Maritime SEA. Additionally, we describe the phylogenetic relationships among DENV genotypes within each serotype, along with their geographic distribution, to enhance the understanding of DENV dynamics.
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Affiliation(s)
| | | | - Tatsuo Shioda
- Department of Viral Infections, Research Institute for Microbial Diseases, Osaka University, Osaka 565-0871, Japan; (J.P.); (E.E.N.)
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Terra AP, Rohweder R, Herber S, Friedrich L, Sanseverino MTV, Favreto C, Maria FS, Athayde EDJ, Cardoso-Júnior LM, Marinho ACP, Marinho AP, Zarpelon T, Schuler-Faccini L. Microcephaly in South Brazil: Are cases of Congenital Zika Syndrome increasing in recent years? Genet Mol Biol 2024; 46:e20230191. [PMID: 38252061 PMCID: PMC10802226 DOI: 10.1590/1678-4685-gmb-2023-0191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 12/04/2023] [Indexed: 01/23/2024] Open
Abstract
Northeast Brazil was the first region to detect a significant increase in babies born with microcephaly associated with prenatal zika virus infection in 2015. Rio Grande do Sul (RS) state was less impacted due to the temperate climate preventing the spread of the vector. This study investigated the prevalence and etiology of congenital microcephaly in RS in two different periods. This cross-sectional descriptive study included all live births with congenital microcephaly in RS from 2015 to 2022. Cases were divided into two groups: P1 "outbreak" (2015-16); and P2 "endemic" (2017-22). There were 58 cases of microcephaly (3.8/10,000) in P1 and 148 (1.97/10,000) in P2. Congenital Zika Virus infection was the etiology in 5.2% (n=3) in P1 and 6.7% (n=10) in P2. In conclusion, although the ZIKV outbreak in Brazil has receded, RS remains an area of concern, with a possible slight increase of live births with microcephaly secondary to ZIKV prenatal infection relative to the number of cases due to congenital infections. The broader distribution of the vector Aedes aegypti with warmer temperatures in our state might be linked to the increase in recent years. This study can be an alert to other regions of temperate or subtropical climates.
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Affiliation(s)
- Anna Pires Terra
- Universidade Federal do Rio Grande do Sul (UFRGS), Programa de Pós-Graduação em Genética e Biologia Molecular (PPGBM), Porto Alegre, RS, Brazil
- Hospital de Clínicas de Porto Alegre, Serviço de Genética Médica, Sistema de Informação sobre Agentes Teratogênicos (SIAT), Porto Alegre, RS, Brazil
- Hospital de Clínicas de Porto Alegre (HCPA), Serviço de Neonatologia, Porto Alegre, RS, Brazil
| | - Ricardo Rohweder
- Universidade Federal do Rio Grande do Sul (UFRGS), Programa de Pós-Graduação em Genética e Biologia Molecular (PPGBM), Porto Alegre, RS, Brazil
- Hospital de Clínicas de Porto Alegre, Serviço de Genética Médica, Sistema de Informação sobre Agentes Teratogênicos (SIAT), Porto Alegre, RS, Brazil
| | - Silvani Herber
- Hospital de Clínicas de Porto Alegre (HCPA), Serviço de Neonatologia, Porto Alegre, RS, Brazil
- Universidade Federal de Ciências da Saúde de Porto Alegre(UFCSPA), Departamento de Enfermagem, Porto Alegre, RS, Brazil
| | - Luciana Friedrich
- Hospital de Clínicas de Porto Alegre (HCPA), Serviço de Neonatologia, Porto Alegre, RS, Brazil
- Universidade Federal do Rio Grande do Sul, Faculdade de Medicina, Porto Alegre, RS, Brazil
| | - Maria Teresa Vieira Sanseverino
- Universidade Federal do Rio Grande do Sul (UFRGS), Programa de Pós-Graduação em Genética e Biologia Molecular (PPGBM), Porto Alegre, RS, Brazil
- Hospital de Clínicas de Porto Alegre, Serviço de Genética Médica, Sistema de Informação sobre Agentes Teratogênicos (SIAT), Porto Alegre, RS, Brazil
| | - Catia Favreto
- Secretaria de Saúde do Estado do Rio Grande do Sul (SES/RS), Centro Estadual de Vigilância em Saúde (CEVS), Porto Alegre, RS, Brazil
| | - Fernanda Santa Maria
- Hospital de Clínicas de Porto Alegre, Serviço de Genética Médica, Sistema de Informação sobre Agentes Teratogênicos (SIAT), Porto Alegre, RS, Brazil
| | - Emilly de Jesus Athayde
- Universidade Federal do Rio Grande do Sul (UFRGS), Programa de Pós-Graduação em Genética e Biologia Molecular (PPGBM), Porto Alegre, RS, Brazil
- Hospital de Clínicas de Porto Alegre, Serviço de Genética Médica, Sistema de Informação sobre Agentes Teratogênicos (SIAT), Porto Alegre, RS, Brazil
| | - Laércio Moreira Cardoso-Júnior
- Universidade Federal do Rio Grande do Sul (UFRGS), Programa de Pós-Graduação em Genética e Biologia Molecular (PPGBM), Porto Alegre, RS, Brazil
- Hospital de Clínicas de Porto Alegre, Serviço de Genética Médica, Sistema de Informação sobre Agentes Teratogênicos (SIAT), Porto Alegre, RS, Brazil
| | | | | | - Tailine Zarpelon
- Universidade Federal do Rio Grande do Sul, Faculdade de Odontologia, Porto Alegre, RS, Brazil
| | - Lavínia Schuler-Faccini
- Universidade Federal do Rio Grande do Sul (UFRGS), Programa de Pós-Graduação em Genética e Biologia Molecular (PPGBM), Porto Alegre, RS, Brazil
- Hospital de Clínicas de Porto Alegre, Serviço de Genética Médica, Sistema de Informação sobre Agentes Teratogênicos (SIAT), Porto Alegre, RS, Brazil
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