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Júnior DST. High risk of bat bites in an indigenous village in Brazil: Warning of the re-emergence of rabies among the Maxakali People. Acta Trop 2024; 249:107073. [PMID: 37956818 DOI: 10.1016/j.actatropica.2023.107073] [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: 09/24/2023] [Accepted: 11/10/2023] [Indexed: 11/15/2023]
Abstract
Bat-mediated human rabies is a viral zoonotic disease that poses a serious threat to the public health of traditional peoples, especially indigenous populations that maintain primitive cultural and social habits, such as the Maxakali ethnic group, located in the southeastern region of Brazil. The sociocultural habit of this population led to the emergence between April and May 2022 of the viral spillover of rabies transmitted by bats, which decimated the lives of four children from this population who maintained contact with this animal as a recreational practice. Because the vampire bats Desmodus rotundus have exceptional ecology and social characteristics that can have important effects on the dynamics of viral dispersion in this indigenous population, I present the dynamics of contact between native children and the bat and the meaning of this relationship, which involves ritualistic and recreational significance. As important as knowing the reasons for this practice is discussing some intrinsic and extrinsic factors that imply risks that intensify the vulnerability of this population to the transmission of the rabies virus at any time. In view of this, I warn of the need to adopt efficient strategies to mitigate the risks of a new emergency in this region. Although emergency containment measures were carried out during the critical period of the outbreak, such animal and environmental control actions must become routine programmatic and structuring interventions. Essential for rabies surveillance in this population is to develop culturally adapted interethnic health education campaigns to guarantee the accessibility of the Maxakali indigenous people to the content taught, so that any attempt at domestication, captivity and recreational practices with bats of any species is discouraged, thus avoiding a possible re-emergence of this anthropozoonosis that has impacted not only the epidemiological scenario in this region, but throughout Brazil, and also throughout Latin America.
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Affiliation(s)
- Dilceu Silveira Tolentino Júnior
- Federal University of the Jequitinhonha and Mucuri Valleys, Postgraduate Program in Tecnhology, Environment and Society, Teófilo Otoni, Minas Gerais, Brazil.
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Himelreich-Perić M, Katušić-Bojanac A, Hohšteter M, Sinčić N, Mužić-Radović V, Ježek D. Mast Cells in the Mammalian Testis and Epididymis-Animal Models and Detection Methods. Int J Mol Sci 2022; 23:ijms23052547. [PMID: 35269690 PMCID: PMC8909951 DOI: 10.3390/ijms23052547] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 02/21/2022] [Accepted: 02/23/2022] [Indexed: 02/04/2023] Open
Abstract
Mast cells (MCs) are an evolutionary well-conserved type of cells, mediating and modulating allergic responses in innate immunity and tissue remodeling after chronic inflammation. Among other tissues, they inhabit both the testis and epididymis. In the testis, MCs usually appear in the interstitial compartment in humans, but not in other standard experimental models, like rats and mice. MCs seem to be responsible for testicular tissue fibrosis in different causes of infertility. Although experimental animal models follow the effect on MC activation or penetration to the interstitial tissue like in humans to some extent, there is an inconsistency in the available literature regarding experimental design, animal strain, and detection methods used. This comprehensive review offers an insight into the literature on MCs in mammalian testes and epididymides. We aimed to find the most suitable model for research on MC and offer recommendations for future experimental designs. When using in vivo animal models, tunica albuginea incorporation and standard histological assessment need to be included. Domesticated boar strains kept in modified controlled conditions exhibit the highest similarity to the MC distribution in the human testis. 3D testicular models are promising but need further fine-tuning to become a valid model for MC investigation.
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Affiliation(s)
- Marta Himelreich-Perić
- Scientific Centre of Excellence for Reproductive and Regenerative Medicine, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (A.K.-B.); (N.S.); (D.J.)
- Department of Biology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia
- Correspondence:
| | - Ana Katušić-Bojanac
- Scientific Centre of Excellence for Reproductive and Regenerative Medicine, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (A.K.-B.); (N.S.); (D.J.)
- Department of Biology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia
| | - Marko Hohšteter
- Department of Veterinary Pathology, Faculty of Veterinary Medicine, University of Zagreb, 10000 Zagreb, Croatia;
| | - Nino Sinčić
- Scientific Centre of Excellence for Reproductive and Regenerative Medicine, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (A.K.-B.); (N.S.); (D.J.)
- Department of Biology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia
| | - Vedrana Mužić-Radović
- Hospital for Medical Rehabilitation of the Health and Lung Diseases and Rheumatism “Thalassotherapia-Opatija”, 51410 Opatija, Croatia;
| | - Davor Ježek
- Scientific Centre of Excellence for Reproductive and Regenerative Medicine, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia; (A.K.-B.); (N.S.); (D.J.)
- Department of Histology and Embryology, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia
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Silva SFM, Oliveira LCA, Dias FCR, Cordero-Schmidt E, Vargas-Mena JC, Silva IGM, Báo SN, Luna JLS, Lima RRM, Júnior RFA, Farias NBS, Moura CEB, Matta SLP, Morais DB. Seasonal evaluation of spermatogenesis of the hematophagous bat Desmodus rotundus in the Caatinga biome. PLoS One 2020; 15:e0242932. [PMID: 33270698 PMCID: PMC7714151 DOI: 10.1371/journal.pone.0242932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 11/12/2020] [Indexed: 11/29/2022] Open
Abstract
This study was aimed to characterize the spermatogenic process and its seasonal variation in Desmodus rotundus, in the Caatinga biome, a water-limited ecosystem, with marked water restriction during most of the year. Collections of adult animals were performed during the dry and rainy seasons, and after euthanasia, their testes were processed histologically to perform morphological, morphometric, ultrastructural and immunohistochemical analyzes. The percentage of seminiferous epithelium, number of Leydig cells per gram of testis, and population of Sertoli cells and A-type spermatogonia presented by D. rotundus were significantly higher in the rainy season, while the percentage of lumen, mitotic index, support capacity performed by Sertoli cells, and overall yield of spermatogenesis were higher in the dry season. The ultrastructure of spermatogenesis was similar to that described in other mammals, and the immunohistochemical analysis revealed activity of the aromatase enzyme in Sertoli cells, Leydig cells, spermatocytes and spermatids, as well as the presence of androgen receptors in Sertoli cells and Leydig cells. FGF2 activity was detected in primary spermatocytes in zygotene and pachytene, as well as secondary spermatocytes and rounded and elongated spermatids, while the BCL-2 protein was expressed in primary spermatocytes in zygotene and pachytene, secondary spermatocytes, and rounded spermatids. The activity of these molecules was similar in both seasons, and associated with the morphometric findings, indicates maintenance in the integrity of the seminiferous epithelium throughout the year. The seasonal study of D. rotundus spermatogenesis indicates a continuous spermatogenesis pattern and suggests a greater production of spermatozoa in the rainy season in the Caatinga biome.
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Affiliation(s)
- Soraia F. M. Silva
- Department of Morphology, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Laryssa C. A. Oliveira
- Department of Morphology, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Fernanda C. R. Dias
- Department of General Biology, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil
| | - Eugenia Cordero-Schmidt
- Department of Ecology, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Juan C. Vargas-Mena
- Department of Ecology, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Ingrid G. M. Silva
- Department of Cell Biology, University of Brasília, Brasília, Distrito Federal, Brazil
| | - Sônia N. Báo
- Department of Cell Biology, University of Brasília, Brasília, Distrito Federal, Brazil
| | - João L. S. Luna
- Department of Morphology, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Ruthnaldo R. M. Lima
- Department of Morphology, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Raimundo F. A. Júnior
- Department of Morphology, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Naisandra B. S. Farias
- Department of Morphology, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Carlos E. B. Moura
- Department of Animal Sciences, Federal Rural University of the Semi-Arid Region, Mossoró, Rio Grande do Norte, Brazil
| | - Sérgio L. P. Matta
- Department of General Biology, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil
| | - Danielle B. Morais
- Department of Morphology, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
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Castro MM, Kim B, Games PD, Hill E, Neves CA, Serrão JE, Breton S, Machado-Neves M. Distribution pattern of ZO-1 and claudins in the epididymis of vampire bats. Tissue Barriers 2020; 8:1779526. [PMID: 32552339 DOI: 10.1080/21688370.2020.1779526] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Epithelial cells connect with each other by tight junctions (TJs) in several tissues. In epididymides, TJs proteins form the blood-epididymis barrier (BEB), which is crucial for male fertility. However, little is known about BEB morphological and physiological aspects in wild animals. This study examines the region-specific distribution pattern of TJs proteins in D. rotundus' epididymis, assessing their regulation in rainy and dry season. The expression of zonula occludens-1 (ZO-1), and claudins (Cldn)-1, -3, and -4 were evaluated by confocal immunofluorescence and ELISA analysis. Herein, ZO-1 was strictly expressed in TJs, whereas Cldns were expressed in TJs and basolateral membranes of epithelial cells. Their co-localization and intensity of expression varied in the epididymal regions examined. The effect of season on protein expression was detected mainly in TJ proteins located in the proximal regions. As such, in the initial segment (IS), Cldn-3 and -4 were detected at low levels in basolateral membranes in the rainy season compared to the dry season. Furthermore, in the distal IS, Cldn-1 expression was lower in TJs of epithelial cells during the rainy season than the dry season. ZO-1 expression was higher in the cauda region than the corpus region by ELISA analysis. Additionally, in the corpus region, ZO-1 expression was higher in TJs during dry season compared to the rainy season. Our study sheds light on the understanding of BEB in D. rotundus, improving the knowledge of their reproductive biology.
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Affiliation(s)
- Mariana M Castro
- Departmento De Biologia Geral, Universidade Federal De Viçosa , Viçosa, Brasil
| | - Bongki Kim
- Program in Membrane Biology/Nephrology Division, Massachusetts General Hospital/Harvard Medical School , Boston, MA, USA.,Department of Animal Resources Science, Kongju National University , Yesan, Republic of Korea
| | - Patrícia D Games
- Departmento De Biologia Geral, Universidade Federal De Viçosa , Viçosa, Brasil
| | - Eric Hill
- Program in Membrane Biology/Nephrology Division, Massachusetts General Hospital/Harvard Medical School , Boston, MA, USA
| | | | - José Eduardo Serrão
- Departmento De Biologia Geral, Universidade Federal De Viçosa , Viçosa, Brasil
| | - Sylvie Breton
- Program in Membrane Biology/Nephrology Division, Massachusetts General Hospital/Harvard Medical School , Boston, MA, USA
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Silva LLDS, Fernandes KM, Miranda FR, Silva SCC, Coelho LCBB, Navarro DMDAF, Napoleão TH, Martins GF, Paiva PMG. Exposure of mosquito (Aedes aegypti) larvae to the water extract and lectin-rich fraction of Moringa oleifera seeds impairs their development and future fecundity. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 183:109583. [PMID: 31446169 DOI: 10.1016/j.ecoenv.2019.109583] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 08/02/2019] [Accepted: 08/17/2019] [Indexed: 06/10/2023]
Abstract
Aedes aegypti control is a key component of the prophylaxis of dengue fever and other diseases. Moringa oleifera seeds contain a water-soluble lectin (WSMoL) with larvicidal and ovicidal activities against this insect. In this study, A. aegypti individuals were exposed at the third larval instar for 24 h to the water extract (0.1-1.0 mg/mL of protein) or lectin-rich fraction (0.05-0.6 mg/mL of protein) containing WSMoL, and then their survival and development were followed for 9 days post-exposure. The feeding capacity of adult females that developed from the treated larvae and the hatching success of eggs laid by them were also evaluated. Further, any alterations to the midgut histology of treated larvae, pupae, and adults were investigated. The extract and fraction induced the death of A. aegypti larvae along the post-exposure period. Both preparations also delayed the developmental cycle. The midguts of treated larvae and pupae showed disorganization and epithelial vacuolization, while in treated adults, the epithelium was underdeveloped compared to control. Unlike in control mosquitos, proliferating cells were not detected in treated larvae, and appeared in lower numbers in treated pupae than in control pupae. Adult females that developed from larvae treated with the fraction gained less weight after a blood meal compared with control. The amount of eggs laid by females that developed from larvae treated with both the extract and fraction was significantly lower than in control. In addition, the eggs showed lower hatching rates. In conclusion, females that developed from larvae treated with both the water extract and lectin-rich fraction showed reduced engorgement after a blood meal, with the consequent impairment of their fertility and fecundity. These results were probably due to the damage to midgut organization and impairment of the remodeling process during metamorphosis.
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Affiliation(s)
- Livia Lais de Santana Silva
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil
| | - Kenner Morais Fernandes
- Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Franciane Rosa Miranda
- Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Stella Cristina Cabral Silva
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil
| | | | | | - Thiago Henrique Napoleão
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil.
| | | | - Patrícia Maria Guedes Paiva
- Departamento de Bioquímica, Centro de Biociências, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil.
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