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Lima-de-Souza JR, de Oliveira PR, Anholeto LA, Sodelli LF, Ferreira ARF, Remedio RN, Camargo-Mathias MI. The bioactive compound carvacrol as a potential acaricide: An assessment of its effects on the integument of female Rhipicephalus sanguineus sensu lato ticks. Microsc Res Tech 2021; 85:1784-1790. [PMID: 34962006 DOI: 10.1002/jemt.24038] [Citation(s) in RCA: 3] [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] [Received: 09/09/2021] [Revised: 11/22/2021] [Accepted: 12/16/2021] [Indexed: 11/08/2022]
Abstract
Studies seeking control methods for infestation of Riphicephalus sanguineus sensu lato (s.l.) ticks (dog ticks) have been carried out in order to minimize damage to both the tick's hosts and the environment, the latter due to the misuse of acaricide products. In this regard, carvacrol has been used as a natural alternative against ticks as it displays several properties including acaricidal. In this context, the present study aimed to evaluate the ultramorphology and morphohistochemistry of the integument of semi-engorged R. sanguineus s.l. females exposed to different carvacrol concentrations. The findings indicate that the integument surface of females exposed to the highest carvacrol concentration (25 μl/ml) became wrinkled, suggesting dehydration or the result of integument cuticular and epithelial layer disorganization in response to the toxic product. Morphohistochemical integument layer alterations were more significant and intense in females exposed to the highest carvacrol concentration (25 μl/ml), confirming dose-dependent carvacrol action. Among other cell and tissue alterations, changes in epithelial cell shape, size, and arrangement (epidermal layer) were noted, alongside altered and pyknotic-shaped nuclei, suggesting a death process for these cells. This epithelium changed from simple cubic to stratified, also in response to the presence of the evaluated bioactive compound. Thus, the findings reported herein demonstrate that carvacrol may be an alternative for an efficient and more sustainable tick control in the near future.
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Affiliation(s)
- José Ribamar Lima-de-Souza
- Center for Biological and Natural Sciences (CCBN), Federal University of Acre (UFAC), Rio Branco, Brazil
| | - Patrícia Rosa de Oliveira
- Biosciences Postgraduate Program, Multidisciplinary Institute for Health, Federal University of Bahia (UFBA), Vitória da Conquista/BA, 45029-094., Brazil.,Chemistry Postgraduate Program, Exact and Technology Sciences Center, Federal University of Maranhão (UFMA), São Luís/MA, 65080-805, Brazil
| | - Luís Adriano Anholeto
- Department of Biology, Institute of Biosciences, São Paulo State University-UNESP, Rio Claro, Brazil
| | - Luís Fernando Sodelli
- Department of Biology, Institute of Biosciences, São Paulo State University-UNESP, Rio Claro, Brazil
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de Oliveira PR, Santos Monteiro OD, da Rocha CQ, Costa-Júnior LM, Pinheiro Camara MB, da Silva Pereira TC, Soares Maia JG. Exposure of Rhipicephalus sanguineus sensu lato Latreille, 1806 (Acari: Ixodidae) to hexane extract of Acmella oleracea (Jambu): semi-engorged and engorged ticks. Ticks Tick Borne Dis 2021; 12:101705. [PMID: 33730658 DOI: 10.1016/j.ttbdis.2021.101705] [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: 04/17/2020] [Revised: 01/26/2021] [Accepted: 02/25/2021] [Indexed: 10/21/2022]
Abstract
The present study analyzed the efficacy of hexane extract of Acmella oleracea against Rhipicephalus sanguineus sensu lato. After exposure of R. sanguineus s. l. female ticks to 14 different concentrations of the hexane extract of A. oleracea, the LC50 was established as 18.135 mg/mL (limits: 16.251-22.675). The effects of the extract were more significant in the ovary of the semi-engorged females, that presented damages in most oocytes. Since such changes would not be repaired, the oocytes could not advance to further stages of development (I-V), thereby causing the inhibition of ovary development, interruption of vitellogenesis, oocyte death and, consequently, infertility. The semi-engorged females also presented extensive damages in the midgut cells, which would prevent (totally or partially) these cells from functioning properly (blood intake and release of nutrients), impairing the ectoparasite nutrition and the viability of the individual. Thus, the hexane extract of A. oleracea can be considered as a promising alternative to chemical control of pests of medical and veterinary importance, due to its efficient acaricidal activity and lesser environmental impact, when used against female ticks in the middle feeding stage.
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Affiliation(s)
- Patrícia Rosa de Oliveira
- Chemistry Post Graduate Program, Exact and Technology Sciences Center, Federal University of Maranhão (UFMA), Av. Dos Portugueses, 1966, Bacanga, São Luís, MA, 65080-805, Brazil.
| | | | | | | | - Marcos Bispo Pinheiro Camara
- Chemistry Post Graduate Program, Exact and Technology Sciences Center, Federal University of Maranhão (UFMA), Av. Dos Portugueses, 1966, Bacanga, São Luís, MA, 65080-805, Brazil
| | - Tereza Cristina da Silva Pereira
- Chemistry Post Graduate Program, Exact and Technology Sciences Center, Federal University of Maranhão (UFMA), Av. Dos Portugueses, 1966, Bacanga, São Luís, MA, 65080-805, Brazil
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Matos RS, de Oliveira PR, Coelho L, de Paula LGF, Zeringota V, Carvalho Silva B, Monteiro C, Daemon E, Camargo-Mathias MI. Thymol: Effects on reproductive biology and Gene's organ morphology in Rhipicephalus sanguineus sensu lato engorged females (Acari: Ixodidae). Ticks Tick Borne Dis 2019; 11:101308. [PMID: 31640939 DOI: 10.1016/j.ttbdis.2019.101308] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [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: 04/01/2019] [Revised: 09/10/2019] [Accepted: 09/25/2019] [Indexed: 11/16/2022]
Abstract
Thymol is a monoterpene with proven acaricidal activity on different tick species and life stages. The objective of this work was to evaluate the effect of thymol on the reproductive biology of engorged females of Rhipicephalus sanguineus sensu lato and the morphological changes caused in the cells of the tubular and accessory glands of Gené's organ. The females were exposed to thymol by immersion. Seven groups were established: group I (distilled water), group II (30% ethanol), group III (thymol 1.25 mg/mL), group IV (thymol 2.5 mg/mL), group V (thymol 5.0 mg/mL), group VI (thymol 10.0 mg/mL), and group VII (thymol 20.0 mg/mL), with 20 replicates for each treatment. The ticks were kept in a BOD incubator at 27 ± 1 °C and RH > 80 ± 10%. Ten females from each group were evaluated daily until death, and the remaining ten were kept in the incubator under the same conditions for five days and then dissected for the removal of Gené's organ to note possible damage to cell morphology by scanning electron microscopy (SEM) and hematoxylin-eosin (HE) techniques. Thymol demonstrated 63% and 98% efficacy in groups VI (10.0 mg/mL) and VII (20.0 mg/mL), respectively. In these groups, the cells of the tubular and accessory glands of Gené's organ showed signs of damage: irregular eosin staining, rupture and deformation of the cellular limit, presence of fragmented nuclei, changes in cytoplasmic homogeneity and areas with deformation (folds) in the basal region.
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Affiliation(s)
- Renata Silva Matos
- Departamento de Biologia, Instituto de Biociências, UNESP, Av. 24 A, n° 1515, cx. Postal 199, CEP: 13506-900, Rio Claro, SP, Brazil; Programa de Pós-graduação em Ciências Biológicas, Comportamento e Biologia Animal da Universidade Federal de Juiz de Fora(1), Rua José Lourenço Kelmer, s/n, Bairro Martelos, CEP. 36036-330, Juiz de Fora, MG, Brazil.
| | - Patrícia Rosa de Oliveira
- Departamento de Biologia, Instituto de Biociências, UNESP, Av. 24 A, n° 1515, cx. Postal 199, CEP: 13506-900, Rio Claro, SP, Brazil
| | - Letícia Coelho
- Programa de Pós-graduação em Ciência Animal (PPGCA) da Universidade Federal de Goiás. Avenida Esperança, s/n, Campus Samambaia, CEP: 74.690-900, Goiânia, GO, Brazil
| | - Luiza Gabriella Ferreira de Paula
- Programa de Pós-graduação em Ciência Animal (PPGCA) da Universidade Federal de Goiás. Avenida Esperança, s/n, Campus Samambaia, CEP: 74.690-900, Goiânia, GO, Brazil
| | - Viviane Zeringota
- Programa de Pós-graduação em Ciência Animal (PPGCA) da Universidade Federal de Goiás. Avenida Esperança, s/n, Campus Samambaia, CEP: 74.690-900, Goiânia, GO, Brazil
| | - Bianca Carvalho Silva
- Programa de Pós-graduação em Ciências Biológicas, Comportamento e Biologia Animal da Universidade Federal de Juiz de Fora(1), Rua José Lourenço Kelmer, s/n, Bairro Martelos, CEP. 36036-330, Juiz de Fora, MG, Brazil
| | - Caio Monteiro
- Instituto de Patologia Tropical e Saúde Pública (IPTSP) da Universidade Federal de Goiás (GO). Rua 235, s/n, Setor Universitário, CEP: 74605-050, Góias, GO, Brazil
| | - Erik Daemon
- Programa de Pós-graduação em Ciências Biológicas, Comportamento e Biologia Animal da Universidade Federal de Juiz de Fora(1), Rua José Lourenço Kelmer, s/n, Bairro Martelos, CEP. 36036-330, Juiz de Fora, MG, Brazil
| | - Maria Izabel Camargo-Mathias
- Departamento de Biologia, Instituto de Biociências, UNESP, Av. 24 A, n° 1515, cx. Postal 199, CEP: 13506-900, Rio Claro, SP, Brazil
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de Freitas-Blanco VS, Monteiro KM, de Oliveira PR, de Oliveira ECS, de Oliveira Braga LE, de Carvalho JE, Ferreira Rodrigues RA. Spilanthol, the Principal Alkylamide from Acmella oleracea, Attenuates 5-Fluorouracil-Induced Intestinal Mucositis in Mice. Planta Med 2019; 85:203-209. [PMID: 30153691 DOI: 10.1055/a-0715-2002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Mucositis is one of the commonest side effects in cancer patients undergoing treatment with radiotherapy and/or chemotherapy, and it currently lacks appropriate and effective treatment. Acmella oleracea, a species of flowering herb from South America, contains spilanthol, an alkylamide that has several pharmacological properties, including anesthetic, analgesic, and anti-inflammatory activities. Therefore, the purpose of this work was to evaluate the effect of spilanthol in intestinal mucositis in Swiss mice induced by 5-fluorouracil (5-FU), an antineoplastic agent administered systemically for the treatment of many different cancers. The repeated administration of 5-FU resulted in intestinal mucositis and consequent decreased food intake, together with weight loss, in all the animals. Daily administration of spilanthol significantly lowered the severity of intestinal mucositis, reducing histopathological changes and increasing the villus height in the animals treated with spilanthol at a dosage of 30 mg/kg (p < 0.0044) compared to a group exposed only to 5-FU. A decrease of myeloperoxidase activity was also observed in the animals treated with 30 mg/kg of spilanthol (p < 0.05), although several pro-inflammatory cytokines were not quantifiable in any group. In conclusion, the data demonstrated that spilanthol effectively reduced inflammation in a mouse model of intestinal mucositis induced by 5-FU, and that the compound might be a promising therapeutic candidate for the prevention and treatment of this condition.
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Affiliation(s)
- Veronica Santana de Freitas-Blanco
- Pharmacology, Anesthesiology, and Therapeutics, Department of Physiological Sciences, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
- Chemical, Biological, and Agricultural Pluridisciplinary Research Center (CPQBA), Division of Chemistry of Natural Products, University of Campinas, Paulinia, SP, Brazil
| | - Karin Maia Monteiro
- Chemical, Biological, and Agricultural Pluridisciplinary Research Center (CPQBA), Division of Pharmacology and Toxicology, University of Campinas, Paulinia, SP, Brazil
| | - Patrícia Rosa de Oliveira
- São Paulo State University (UNESP), Department of Biology, Institute of Biosciences, Rio Claro, SP, Brazil
| | - Ellen Cristina Souza de Oliveira
- Chemical, Biological, and Agricultural Pluridisciplinary Research Center (CPQBA), Division of Pharmacology and Toxicology, University of Campinas, Paulinia, SP, Brazil
| | - Lucia Elaine de Oliveira Braga
- Pharmacology, Anesthesiology, and Therapeutics, Department of Physiological Sciences, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
- Chemical, Biological, and Agricultural Pluridisciplinary Research Center (CPQBA), Division of Pharmacology and Toxicology, University of Campinas, Paulinia, SP, Brazil
| | - João Ernesto de Carvalho
- Chemical, Biological, and Agricultural Pluridisciplinary Research Center (CPQBA), Division of Pharmacology and Toxicology, University of Campinas, Paulinia, SP, Brazil
- Faculty of Pharmaceutical Sciences, University of Campinas, Campinas, SP, Brazil
| | - Rodney Alexandre Ferreira Rodrigues
- Pharmacology, Anesthesiology, and Therapeutics, Department of Physiological Sciences, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
- Chemical, Biological, and Agricultural Pluridisciplinary Research Center (CPQBA), Division of Chemistry of Natural Products, University of Campinas, Paulinia, SP, Brazil
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de Oliveira PR, Anholeto LA, Ferreira Rodrigues RA, Arnosti A, Bechara GH, de Carvalho Castro KN, Camargo-Mathias MI. Cytotoxic Effects of Extract of Acmella oleracea in the Ovaries and Midgut of Rhipicephalus sanguineus Latreille, 1806 (Acari: Ixodidae) Female Ticks. J Microsc Ultrastruct 2019; 7:28-43. [PMID: 31008054 PMCID: PMC6442324 DOI: 10.4103/jmau.jmau_16_18] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
The present study investigated the effects of different concentrations of Acmella oleracea extract on the germinative cells and digestive processes of semi-engorged Rhipicephalus sanguineus females. For this experiment, 150 ticks were divided into five groups (30 individuals each). The animals were immersed for 5 min in different concentrations of the extract, distilled water, or ethanol 50%/DMSO 1%, dried, and kept in biological oxygen demand incubator for 7 days. The alterations were associated with the size of germinative cells and yolk granules; presence, size, and location of vacuoles in the cytoplasm of germinative cells; nuclear modifications in the germinative cells; damages to the nucleus and cytoplasm of the midgut generative cells; size of digestive cells; number of captured blood elements; accumulated digestive residues and digestive vacuoles in the digestive cells cytoplasm; and the number and distribution of proteins and polysaccharides in all the cells of both organs. The concentrations used in this study prevented an efficient and complete blood digestion by the midgut epithelial cells of the treated animals, resulting in the absence of the necessary nutrients to maintain the physiological events in the ectoparasites. In advanced stages, This can lead the ectoparasite to death. The germinative cells were highly impaired and probably not able to advance developmental stages (I–V) or complete vitellogenesis to be released during ovulation, which would prevent the females from originating a new individual. Thus, it can be concluded that the effects of A. oleracea are similar to those caused by chemical products widely recognized as effective to control ticks.
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Affiliation(s)
- Patrícia Rosa de Oliveira
- Graduate Program in Chemistry, Universidade Federal do Maranhão (UFMA), Av. dos Portugueses, 1966, Bacanga, São Luís/MA, Paulínia, São Paulo, Brazil
| | - Luis Adriano Anholeto
- Graduate Program in Chemistry, Universidade Federal do Maranhão (UFMA), Av. dos Portugueses, 1966, Bacanga, São Luís/MA, Paulínia, São Paulo, Brazil
| | | | - André Arnosti
- Graduate Program in Chemistry, Universidade Federal do Maranhão (UFMA), Av. dos Portugueses, 1966, Bacanga, São Luís/MA, Paulínia, São Paulo, Brazil
| | - Gervásio Henrique Bechara
- Graduate Program in Animal Science, School of Agricultural Science and Veterinary Medicine, The Pontificia Universidade Catolica do Parana - PUCPR, Rua Imaculada Conceição, Curitiba, PR, Brazil
| | | | - Maria Izabel Camargo-Mathias
- Graduate Program in Chemistry, Universidade Federal do Maranhão (UFMA), Av. dos Portugueses, 1966, Bacanga, São Luís/MA, Paulínia, São Paulo, Brazil
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Marques EDS, Froder JG, Oliveira PRD, Perazzo FF, Rosa PCP, Gaivão IODM, Mathias MIC, Maistro EL. Cytotoxic effects of Euterpe oleraceae fruit oil (açaí) in rat liver and thyroid tissues. Revista Brasileira de Farmacognosia 2019. [DOI: 10.1016/j.bjp.2018.12.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Santos JCD, Oliveira PRD, Camargo-Mathias MI, Perazzo FF, Rosa PCP, Gaivão IODM, Maistro EL. Hepatic and splenic cytotoxic evaluation after Crataegus oxyacantha fruit extract administration on mice. Histol Histopathol 2019. [DOI: 10.7243/2055-091x-6-10] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Lima de Souza JR, Oliveira PRD, Anholeto LA, Arnosti A, Daemon E, Remedio RN, Camargo-Mathias MI. Effects of carvacrol on oocyte development in semi-engorged Rhipicephalus sanguineus sensu lato females ticks (Acari: Ixodidae). Micron 2019; 116:66-72. [DOI: 10.1016/j.micron.2018.09.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 09/27/2018] [Accepted: 09/27/2018] [Indexed: 02/06/2023]
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Anholeto LA, Oliveira PRD, Rodrigues RAF, Yamane LT, Castro KNDC, Ferreira ARF, Camargo-Mathias MI. Toxic action of Acmella oleracea extract on the male reproductive system of Amblyomma cajennense ticks. Vet Parasitol 2017; 244:164-171. [PMID: 28917309 DOI: 10.1016/j.vetpar.2017.07.031] [Citation(s) in RCA: 7] [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] [Received: 05/11/2017] [Revised: 07/11/2017] [Accepted: 07/26/2017] [Indexed: 10/19/2022]
Abstract
The present study evaluated through morphohistological and histochemical techniques the effects of different concentrations of crude ethanolic extract of A. oleracea (EEAO) (Jambu) on the male reproductive system of Amblyomma cajennense sensu stricto (s.s.) ticks. The toxicity of this natural chemical was stablished, signalizing the promising potential of the compound as a strategy to control ectoparasites in the near future. For the experiment, 100 males fed on host rabbits with homogeneous weight (p>0.05) were used. The ticks were divided into five groups (10 animals each): Control 1-exposed to distilled water; Control 2-exposed to ethanol 50% and DMSO 1%; Treatment 1-3-exposed to the concentrations of 6.2, 12.5 and 25mg/mL of the EEAO, respectively, diluted in ethanol 50% and DMSO 1%, with exposure by immersion. After exposure, the males were dissected for the removal of the reproductive system and subjected to routine histological analysis with HE staining and histochemical techniques (PAS for the detection of neutral polysaccharides and Bromophenol blue to detect total proteins). The exposed individuals showed alterations in the glandular complex cells; however, the testes remained intact. The secretory cells of the multilobulated accessory glands presented intense cytoplasmic vacuolation. Additionally, the synthesis and secretion were reduced in the secretion granules, mainly concerning the polysaccharides, glyco- and lipoprotein elements, substances that will constitute the seminal fluid and enable the capacitation of spermatozoa in the female genital tract and also necessary for the formation of the spermatophore, which will encapsulate the mature spermatids. The alterations were dose-dependent, i.e., more intense and severe as the concentration of the product increased. .This experiment confirmed the cytotoxic potential of A. oleracea ethanolic extract in the concentrations of 6.2, 12.5 and 25mg/mL on the reproductive system of A. cajennense s.s. male ticks.
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Affiliation(s)
- Luís Adriano Anholeto
- Department of Biology, Institute of Biosciences, São Paulo State University, UNESP, Av. 24 A, n° 1515, 199, 13506-900, Rio Claro, SP, Brazil
| | - Patrícia Rosa de Oliveira
- Department of Biology, Institute of Biosciences, São Paulo State University, UNESP, Av. 24 A, n° 1515, 199, 13506-900, Rio Claro, SP, Brazil
| | - Rodney Alexandre Ferreira Rodrigues
- Chemical, Biological and Agricultural Research Center (CPQBA), Natural Products Chemistry Division, University of Campinas, Av. Alexandre Cazellato, n° 999, 13148-218, Campinas, SP, Brazil
| | - Lais Thiemi Yamane
- Chemical, Biological and Agricultural Research Center (CPQBA), Natural Products Chemistry Division, University of Campinas, Av. Alexandre Cazellato, n° 999, 13148-218, Campinas, SP, Brazil
| | | | - Allan Roberto Fernandes Ferreira
- Department of Biology, Institute of Biosciences, São Paulo State University, UNESP, Av. 24 A, n° 1515, 199, 13506-900, Rio Claro, SP, Brazil
| | - Maria Izabel Camargo-Mathias
- Department of Biology, Institute of Biosciences, São Paulo State University, UNESP, Av. 24 A, n° 1515, 199, 13506-900, Rio Claro, SP, Brazil.
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Camargo-Mathias MI, Pereira NRC, da Silva Reis C, de Almeida CR, Dos Santos Mendes DR, de Araújo GB, Postali L, Figueroa T, Ferreira ARF, Santos JP, de Oliveira PR. Deltamethrin as inductor agent of precocious ovarian degeneration in Rhipicephalus sanguineus s.l. (Acari: Ixodidae) ticks. Exp Appl Acarol 2017; 72:161-169. [PMID: 28597314 DOI: 10.1007/s10493-017-0144-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Accepted: 05/27/2017] [Indexed: 06/07/2023]
Abstract
The cosmopolitan species Rhipicephalus sanguineus s.l. is one of the most widely distributed ticks all over the world. These ectoparasites are vectors of several pathogens and cause significant direct damage to their hosts. The biological success of these ectoparasites has been attributed to their ovaries and salivary glands, organs that ensure their survival in various environmental conditions. The importance of the ovaries in ticks is that, after mating, the individuals are able to lay approximately three thousand eggs. The present study had the objective to demonstrate the effects of deltamethrin obtained from the product Butox P CE 25® (MSD Saúde Animal, São Paulo, Brazil) on the ovarian development of R. sanguineus s.l. females. The chemical was tested in the concentrations of 25, 50, 100 and 200 ppm (respectively 80, 40, 20 and 10 times lower than the recommended by the manufacturer). Through the application of histological techniques and HE staining, the results showed that the deltamethrin was potentially able to modify the morphophysiology of the oocytes in all developmental stages, interfering in the vitellogenesis, causing intense vacuolation, cytoplasmic disorganization, and alterations in the chorion secretion. In addition, the chemical affected the germ vesicle of some oocytes, causing damages and hypertrophy, fragmenting the chromatin and forming bodies strongly stained by hematoxylin. Therefore, this study confirmed that the deltamethrin had an important action on the reproductive system of the R. sanguineus s.l. females, causing the precocious structural disorganization of the germ cells, consequently preventing the generation of new individuals.
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Affiliation(s)
| | | | - Camila da Silva Reis
- Department of Biology, Bioscience Institute, São Paulo State University (Unesp), Rio Claro, SP, Brazil
| | | | | | - Giselle Bezerra de Araújo
- Department of Biology, Bioscience Institute, São Paulo State University (Unesp), Rio Claro, SP, Brazil
| | - Lays Postali
- Department of Biology, Bioscience Institute, São Paulo State University (Unesp), Rio Claro, SP, Brazil
| | - Tober Figueroa
- Department of Biology, Bioscience Institute, São Paulo State University (Unesp), Rio Claro, SP, Brazil
| | | | - Juan Parente Santos
- Department of Biology, Bioscience Institute, São Paulo State University (Unesp), Rio Claro, SP, Brazil
| | - Patrícia Rosa de Oliveira
- Department of Biology, Bioscience Institute, São Paulo State University (Unesp), Rio Claro, SP, Brazil
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de Oliveira PR, Anholeto LA, Bechara GH, Camargo Mathias MI. Dinotefuran-induced morphophysiological changes in semi-engorged females Rhipicephalus sanguineus Latreille, 1806 (Acari: Ixodidae) ticks: Ultra-structural evaluation. Acta Trop 2017; 166:139-154. [PMID: 27876644 DOI: 10.1016/j.actatropica.2016.11.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Revised: 10/21/2016] [Accepted: 11/16/2016] [Indexed: 10/20/2022]
Abstract
The present study demonstrated the effects of dinotefuran (active ingredient of the acaricide Protetor Pet®) on the ovary and midgut cells of semi engorged R. sanguineus females exposed to different concentrations of this chemical. For this, 120 semi-engorged females were divided into four treatment groups with 30 individuals each: group I or control (distilled water), group II (5000ppm), groups III (6250ppm) and group IV (8334ppm of dinotefuran). All the ticks were immersed in the different concentrations of dinotefuran or in distilled water for 5min and then dried and kept in BOD incubator for 7days. The results showed alterations mainly regarding the damaged cell structures, such as yolk granules, organelles and the plasma membrane of the germ cells. In addition, structures related with defense mechanisms were found, such as vacuoles, cytoskeletal filaments, and myelin figures in the germ cells. Damages in the generative cells of the midgut, alterations in the size of digestive cells, the number of endosomes, digestive vacuoles, digestive residues, lipid drops and organelles in the cytoplasm of the digestive cells and the presence of microvilli in the plasma membrane of these cells also demonstrate the progressive damages caused by the action of dinotefuran in the midgut and germ cells of R. sanguineus semi-engorged females. The concentrations applied partially impaired the digestive processes; and, without proper nutrition, all the ectoparasite's physiologic events are prevented from occurring, leading the individual to death. The germ cells were also damaged, and probably would not be able to advance in their development (I-V) and complete the vitellogenesis, which would affect the fertility of the female and consequently impede the formation of a new individual.
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Cunha ELRD, Matos RDS, Pereira NRC, Oliveira PRD, Daemon E, Camargo-Mathias MI. Histopathological changes in the liver and thyroid of mice (Mus musculus) caused by the acaricides: fipronil and thymol. ACTA ACUST UNITED AC 2017. [DOI: 10.7243/2055-091x-4-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Anholeto LA, Oliveira PRD, Rodrigues RAF, Spindola CDS, Labruna MB, Pizano MA, Castro KNDC, Camargo-Mathias MI. Potential action of extract of Acmella oleracea (L.) R.K. Jansen to control Amblyomma cajennense (Fabricius, 1787) (Acari: Ixodidae) ticks. Ticks Tick Borne Dis 2017; 8:65-72. [DOI: 10.1016/j.ttbdis.2016.09.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 08/23/2016] [Accepted: 09/29/2016] [Indexed: 10/20/2022]
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de Oliveira PR, de Carvalho Castro KN, Anholeto LA, Camargo Mathias MI. Cytotoxic effects of extract of Acmella oleraceae (Jambú) in Rhipicephalus microplus females ticks. Microsc Res Tech 2016; 79:744-53. [PMID: 27271726 DOI: 10.1002/jemt.22693] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [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: 02/19/2016] [Accepted: 05/19/2016] [Indexed: 11/10/2022]
Abstract
The present study analyzed the effects of different concentrations of the hexane extract of A. oleraceae (HEAO) (Jambú) on the germ cells of semi-engorged Rhipicephalus microplus female ticks, through a morpho-histological study, evaluating the effectiveness of the extract in the genesis of the individuals. To perform this analysis, 100 semi-engorged females were divided into five groups with 20 individuals each: groups I and II, respectively constituted by distilled water control and 50% ethanol + 1% DMSO, and groups III, IV, and V constituted by treatment with HEAO in the concentrations of 12.5, 25.0 and 50.0 mg/mL, respectively. All the ticks were immersed in the different concentrations of the extract or in distilled water for 5 minutes, dried and conditioned in BOD incubator for 7 days. The individuals of the treatment groups revealed the action of this extract showing alterations in the germ cells of the females from the different groups when compared with those from the groups I and II (control groups). These alterations were mainly related to the size and shape of the oocytes; number of yolk granules; presence, number, size and location of vacuoles in the cytoplasm of all the germ cells; and the presence of nuclear alterations in these cells as well. Thus, it was demonstrated that the concentrations of HEAO affected the germ cells of R. microplus ticks. The effects of the extract are similar to those caused by renowned and efficient chemical products used to control these ticks. Microsc. Res. Tech. 79:744-753, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Patrícia Rosa de Oliveira
- Department of Biology, Institute of Biosciences, São Paulo State University-UNESP, Av. 24 a, Nº 1515, Postal Code 199, Rio Claro, 13506-900, São Paulo, Brazil
| | | | - Luis Adriano Anholeto
- Department of Biology, Institute of Biosciences, São Paulo State University-UNESP, Av. 24 a, Nº 1515, Postal Code 199, Rio Claro, 13506-900, São Paulo, Brazil
| | - Maria Izabel Camargo Mathias
- Department of Biology, Institute of Biosciences, São Paulo State University-UNESP, Av. 24 a, Nº 1515, Postal Code 199, Rio Claro, 13506-900, São Paulo, Brazil
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de Oliveira PR, Scopinho Furquim KC, Bechara GH, Camargo-Mathias MI. Morpho-histochemical characterization of the salivary glands of semi-engorged Amblyomma triste (Koch, 1844) (Acari: Ixodidae) female ticks. J Microsc Ultrastruct 2015; 3:92-99. [PMID: 30023188 PMCID: PMC6014189 DOI: 10.1016/j.jmau.2014.10.003] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2014] [Revised: 09/19/2014] [Accepted: 10/02/2014] [Indexed: 11/14/2022] Open
Abstract
This study presents the morphological and physiological characterization of the salivary glands of semi-engorged Amblyomma triste females. Unfed individuals were placed on New Zealand White rabbits for feeding and the females, after 4 days, were collected, dissected and the salivary glands were submitted to the application of histological (hematoxylin–eosin technique) and histochemical tests for the detection of protein (bromophenol blue technique, polysaccharides (periodic acid–Schiff technique), lipid (Nile blue technique) and calcium (von Kossa technique). The histological results show that the glandular tissue is composed by a system of ducts and three types of acini (I, II and III). The acini I are formed by a large central cell surrounded by several smaller agranular peripheral cells. Acini II are formed by cells a, c1, c2, c3 and c5, which are full of secretion granules. Acini III are constituted by cells d, e and f; the former two contain secretion granules, the latter is agranular. The glandular histochemical composition was also verified. Data obtained here will certainly help in the understanding of the cellular morphology and of the general physiology of these organs in this specie, providing important information for the creation of scientific bases which will contribute for the development of more specific and efficient methods of control.
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Affiliation(s)
| | | | - Gervásio Henrique Bechara
- UNESP - São Paulo State University, Via de acesso Prof. Paulo Castellane, s/n, 14884-900 Jaboticabal, SP, Brazil
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Bozzatto V, Oliveira PRD, Bechara GH, Camargo-Mathias MI. Morphological alterations of epidermis of rabbits infested by R. sanguineus ticks and exposed to Selamectin (active principle of Pfizer Revolution(®) acaricide): a confocal microscopy study. Acta Histochem 2014; 116:534-8. [PMID: 24369880 DOI: 10.1016/j.acthis.2013.11.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 10/08/2013] [Revised: 11/11/2013] [Accepted: 11/12/2013] [Indexed: 12/16/2022]
Abstract
The present study analyzed, by means of confocal laser scanning microscopy, the epidermis of rabbits infested by the brown dog tick Rhipicephalus sanguineus and exposed to concentrations of 50%, 80% and 100% of a selamectin-based commercial acaricide (Pfizer's Revolution(®)). The results demonstrated that rabbits exposed to concentrations of 80% and 100% of the Revolution acaricide, which contains 12% selamectin, showed thinning of epithelial tissue of the epidermis with associated cellular disorganization. Individuals exposed to a 50% concentration showed lower epidermal tissue disorganization when compared to those exposed to the higher doses of the acaricide (80% and 100%). Whereas selamectin, when used in higher concentrations (80% and 100% Revolution(®)) can alter the morphology of the epidermis, at lower concentrations (50%), even though still able to eliminate ectoparasites, it causes less toxicity damage to the host. Selamectin can be considered a dose-dependent toxic agent, since higher concentrations increase the morphological changes in the epidermis of the host rabbits.
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Affiliation(s)
- Vlamir Bozzatto
- UNESP - São Paulo State University, Av. 24A, n. 1515, CP 199, CEP: 13506-900 Rio Claro, SP, Brazil
| | | | - Gervásio Henrique Bechara
- UNESP - São Paulo State University, Via de acesso Prof. Paulo Castellane, s/n, 14884-900 Jaboticabal, SP, Brazil
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E Nico ETM, de Oliveira PR, de Souza LP, Pereira FDC, Delbin MA, Zanesco A, Camargo-Mathias MI. The action of aminoguanidine on the liver of trained diabetic rats. J Diabetes Metab Disord 2013; 12:40. [PMID: 23837632 PMCID: PMC7983740 DOI: 10.1186/2251-6581-12-40] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Accepted: 07/06/2013] [Indexed: 01/11/2023]
Abstract
Background This study evaluated the effect of aminoguanidine on liver of diabetic rats subject to physical exercises using histological and histochemical techniques. Methods The rats used in this study were divided into five groups: sedentary control, sedentary diabetic, trained diabetic, sedentary diabetic and treated with aminoguanidine, trained diabetic and treated with aminoguanidine. Results The results showed no effect of aminoguanidine on the liver tissue, although there was improvement with exercise training showing cytological, morpho-histological and histochemical alterations in liver cells of animals from groups trained diabetic and/or treated diabetic compared to those individuals in the sedentary control and sedentary diabetic. These changes included: hepatocytes hypertrophy, presence and distribution of polysaccharides in the hepatocytes cytoplasm and, especially, congestion of the liver blood vessels. Conclusion Our results suggest that aminoguanidine is not hepatotoxic, when used at dosage of 1 g/L for the treatment of diabetes complications, and confirmed that the practice of moderate physical exercise assuaged the damage caused by diabetes without the use of insulin. Electronic supplementary material The online version of this article (doi:10.1186/2251-6581-12-40) contains supplementary material, which is available to authorized users.
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Affiliation(s)
| | | | - Leonardo Peres de Souza
- UNESP-University Estadual Paulista, Avenida 24 A, 1515, 13506-900, Rio Claro, SP CP 199, Brazil
| | | | - Maria Andréia Delbin
- UNESP-University Estadual Paulista, Avenida 24 A, 1515, 13506-900, Rio Claro, SP CP 199, Brazil
| | - Angelina Zanesco
- UNESP-University Estadual Paulista, Avenida 24 A, 1515, 13506-900, Rio Claro, SP CP 199, Brazil
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de Oliveira PR, Bechara GH, Denardi SE, Oliveira RJ, Mathias MIC. Genotoxic and mutagenic effects of fipronil on mice. ACTA ACUST UNITED AC 2012; 64:569-73. [DOI: 10.1016/j.etp.2010.11.015] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2010] [Revised: 11/07/2010] [Accepted: 11/15/2010] [Indexed: 11/28/2022]
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de Oliveira PR, Calligaris IB, Roma GC, Bechara GH, Pizano MA, Camargo Mathias MI. Potential of the insect growth regulator, fluazuron, in the control of Rhipicephalus sanguineus nymphs (Latreille, 1806) (Acari: Ixodidae): Determination of the LD95 and LD50. Exp Parasitol 2012; 131:35-9. [DOI: 10.1016/j.exppara.2012.02.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Revised: 02/21/2012] [Accepted: 02/27/2012] [Indexed: 10/28/2022]
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Denardi SE, Bechara GH, de Oliveira PR, Camargo Mathias MI. Ultrastructural Analysis of the Oocytes of FemaleRhipicephalus sanguineus(Latreille, 1806) (Acari: Ixodidae) Ticks Subjected to the Action ofAzadirachta indicaA. Juss (Neem). Ultrastruct Pathol 2012; 36:56-67. [DOI: 10.3109/01913123.2011.588819] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Eloisi Denardi S, Henrique Bechara G, Rosa de Oliveira P, Camargo Mathias MI. Inhibitory action of neem aqueous extract (azadirachta indica A. Juss) on the vitellogenesis of rhipicephalus sanguineus (Latreille, 1806) (Acari: Ixodidae) ticks. Microsc Res Tech 2011; 74:889-99. [DOI: 10.1002/jemt.20973] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2010] [Accepted: 11/02/2010] [Indexed: 11/09/2022]
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Pereira CPM, de Oliveira PR, Furquim KCS, Bechara GH, Camargo-Mathias MI. Fipronil-induced cell death in salivary glands of Rhipicephalus sanguineus (Latreille, 1806) (Acari: Ixodidae) semi-engorged females. Exp Parasitol 2011; 127:481-9. [DOI: 10.1016/j.exppara.2010.10.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2010] [Revised: 06/16/2010] [Accepted: 10/12/2010] [Indexed: 10/18/2022]
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Denardi SE, Bechara GH, Oliveira PRD, Camargo-Mathias MI. Azadirachta indica A. Juss (neem) induced morphological changes on oocytes of Rhipicephalus sanguineus (Latreille, 1806) (Acari: Ixodidae) tick females. Exp Parasitol 2010; 126:462-70. [DOI: 10.1016/j.exppara.2010.05.017] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2009] [Revised: 05/18/2010] [Accepted: 05/21/2010] [Indexed: 10/19/2022]
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de Oliveira PR, Bechara GH, Denardi SE, Pizano MA, Mathias MIC. Toxicity effect of the acaricide fipronil in semi-engorged females of the tick Rhipicephalus sanguineus (Latreille, 1806) (Acari: Ixodidae): preliminary determination of the minimum lethal concentration and LC(50). Exp Parasitol 2010; 127:418-22. [PMID: 20932830 DOI: 10.1016/j.exppara.2010.09.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2010] [Revised: 08/06/2010] [Accepted: 09/21/2010] [Indexed: 11/17/2022]
Abstract
Chemical acaricides, especially fipronil (active ingredient of Frontline®), are still the most effective method to control tick populations. In this study, the effectiveness of fipronil was assessed in semi-engorged females of the tick Rhipicephalus sanguineus. A protocol for an in vitro bioassay (AIT) was developed, and the LC(50) (lethal concentration 50%) and 95% confidence interval were determined. Ticks were immersed in Petri dishes with different concentrations of fipronil or distilled water for 2 min, dried, and placed in an incubator for 7 days. Dead R. sanguineus females treated with the 14 concentrations of fipronil were counted daily. Mortality results were compared with the Probit analysis, and the LC(50) and 95% confidence interval were calculated, g (95): LC(50) = 9.647 (4.711 to 13.470). This study was aimed at developing a more appropriate and updated protocol for an in vitro bioassay (AIT--adult immersion test), and providing information on the toxic potential of fipronil (elimination of ectoparasites with lower concentrations) and sensitivity of ticks, especially R. sanguineus, a pest of great interest, due to its occurrence in urban environments.
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Affiliation(s)
- Patrícia Rosa de Oliveira
- Department of Biology, Institute of Biosciences, São Paulo State University-UNESP, Av 24 A, n 1515, Postal Code 199, Zip Code 13506-900, Rio Claro, SP, Brazil
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Mathias MIC, Arnosti A, Brienza PD, Furquim KCS, Oliveira PRD, Denardi SE, Bechara GH. The dynamics of RNA participation in the vitellogenesis of Rhipicephalus sanguineus ticks Latreille 1806 (Acari:Ixodidae). I. Nucleoli or Cajal bodies? Micron 2010; 41:870-6. [DOI: 10.1016/j.micron.2010.04.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2010] [Revised: 04/08/2010] [Accepted: 04/13/2010] [Indexed: 11/26/2022]
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Roma GC, de Oliveira PR, Pizano MA, Camargo Mathias MI. Determination of LC50 of permethrin acaricide in semi-engorged females of the tick Rhipicephalus sanguineus (Latreille, 1806) (Acari: Ixodidae). Exp Parasitol 2009; 123:269-72. [PMID: 19679129 DOI: 10.1016/j.exppara.2009.08.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2009] [Revised: 07/30/2009] [Accepted: 08/07/2009] [Indexed: 11/16/2022]
Affiliation(s)
- Gislaine Cristina Roma
- Departamento de Biologia, Instituto de Biociências, UNESP, Universidade Estadual Paulista Júlio de Mesquita Filho, Rio Claro, SP, CEP 13506-900, Cx. Postal 199, Brazil
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Oliveira PRD, Bechara GH, Morales MAM, Mathias MIC. Action of the chemical agent fipronil on the reproductive process of semi-engorged females of the tick Rhipicephalus sanguineus (Latreille, 1806) (Acari: Ixodidae). Ultrastructural evaluation of ovary cells. Food Chem Toxicol 2009; 47:1255-64. [DOI: 10.1016/j.fct.2009.02.019] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2008] [Revised: 02/01/2009] [Accepted: 02/18/2009] [Indexed: 11/30/2022]
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de Oliveira PR, Bechara GH, Camargo-Mathias MI. Evaluation of cytotoxic effects of fipronil on ovaries of semi-engorged Rhipicephalus sanguineus (Latreille, 1806) (Acari: Ixodidae) tick female. Food Chem Toxicol 2008; 46:2459-65. [PMID: 18501493 DOI: 10.1016/j.fct.2008.03.034] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2007] [Revised: 03/13/2008] [Accepted: 03/28/2008] [Indexed: 11/18/2022]
Abstract
The ovary of the Rhipicephalus sanguineus dog tick female is structurally formed by oocytes in five different stages of development (from I to V) and attached to the gonad by the pedicel. The present study evaluated possible toxic effects of the acaricide fipronil (Frontline) on ovaries of semi-engorged ticks. Sixty partially fed females of R. sanguineus tick were distributed into four groups of 15 specimens each: I--non-treated; II, III and IV--treated with 1, 5 and 10 ppm of fipronil, respectively. The acaricide induced structural changes in the oocytes of individuals of the different treated groups ranging from the presence of a few small vacuoles to cellular death. In conclusion, germinative cells of semi-engorged R. sanguineus tick female are affected by different concentrations of fipronil leading to the reduction of tick fertility.
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Affiliation(s)
- Patrícia Rosa de Oliveira
- Departamento de Biologia, I.B., UNESP, Avenida 24 A, No. 1515, Fone 55 19 35264135, Cx. Postal 199, CEP 13506-900 Rio Claro, SP, Brazil
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de Oliveira PR, Bechara GH, Camargo Mathias MI. Amblyomma triste (Koch, 1844) (Acari: Ixodidae). Exp Parasitol 2007; 116:407-13. [PMID: 17433302 DOI: 10.1016/j.exppara.2007.02.006] [Citation(s) in RCA: 6] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2006] [Revised: 02/11/2007] [Accepted: 02/14/2007] [Indexed: 11/26/2022]
Abstract
This study presents an ultrastructural analysis of the ovary of the tick, Amblyomma triste. The ovary of this species is of the panoistic type that is, without nursing and follicular cells. It is composed of a layer of epithelial cells forming a wall and of germinative cells that generate the oocytes which remain attached to the external margin of this wall by a multicellular pedicel. The different developmental stages in the oocytes had been described by Oliveira et al. [Oliveira, P.R., Bechara, G.H., Camargo-Mathias, M.I., 2006. Amblyomma triste (Koch, 1844) (Acari: Ixodidae): Morphological description of the ovary and of vitellogenesis. Experimental Parasitology 113, 179-185]. The results of the investigation suggest that besides exogenous production of vitellogenic elements, endogenous production can take place simultaneously, contributing to the development and growth of the oocytes.
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Ricardo AJ, de Oliveira PR, Bechara GH, Mathias MIC. Ultrastructural detection of proteins, lipids and carbohydrates in oocytes of Amblyomma triste (Koch, 1844) (Acari; Ixodidae) during the vitellogenesis process. Tissue Cell 2007; 39:203-15. [PMID: 17544471 DOI: 10.1016/j.tice.2007.03.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2006] [Revised: 03/30/2007] [Accepted: 03/31/2007] [Indexed: 10/23/2022]
Abstract
The ovary of the tick Amblyomma triste is classified as panoistic, which is characterized by the presence of oogonia without nurse and follicular cells. The present study has demonstrated that the oocytes in all developmental stages (I-IV) are attached to the ovary through a pedicel, a cellular structure that synthesizes and provides carbohydrate, lipids and proteins supplies for the oocytes during the vitellogenesis process. The lipids are deposited during all oocyte stages; they are freely distributed as observed in stages II, III and IV or they form complexes with other elements. The proteins are also deposited in all stages of the oocytes, however, in lower concentration in the stage IV. There is carbohydrate deposition from oocytes in the stage II as well as in stages III and IV. In addition, the present work has demonstrated that the oocyte yolk of A. triste has a glycolipoprotein nature and the elements are deposited in the following sequence: firstly the lipids and proteins, and finally the carbohydrates.
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Affiliation(s)
- Amanda Juliana Ricardo
- Departamento de Biologia, I.B., UNESP, Av. 24 A, no 1515, Cx. Postal 199, CEP 13506-900, Rio Claro-SP, Brazil
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de Oliveira PR, Mathias MIC, Bechara GH. Vitellogenesis in the tick Amblyomma triste (Koch, 1844) (Acari: Ixodidae). Vet Parasitol 2007; 143:134-9. [PMID: 16978785 DOI: 10.1016/j.vetpar.2006.08.013] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2006] [Revised: 06/19/2006] [Accepted: 08/03/2006] [Indexed: 11/25/2022]
Abstract
This study presents new information on the vitellogenesis of the tick Amblyomma triste. In this species, the ovary consists of a layer of epithelial cells, which form the ovarian wall, oogonia and developing oocytes; and the pedicel, a cellular structure that synthesizes and provides yolk precursors for developing oocytes. The pedicel also attaches oocytes to the external surface of the epithelial wall. In this study, evidence is provided in support of pedicel cells in providing compounds for oocytes during vitellogenesis.
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Affiliation(s)
- Patrícia Rosa de Oliveira
- Departamento de Biologia, I.B., UNESP, Av. 24 A, No. 1515, Fone 55 19 35264135, Cx. Postal 199, CEP 13506-900 Rio Claro, SP, Brazil.
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de Oliveira PR, Camargo Mathias MI, Bechara GH. Amblyomma triste (Koch, 1844) (Acari: Ixodidae): morphological description of the ovary and of vitellogenesis. Exp Parasitol 2006; 113:179-85. [PMID: 16540108 DOI: 10.1016/j.exppara.2006.01.012] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2005] [Revised: 12/29/2005] [Accepted: 01/05/2006] [Indexed: 11/16/2022]
Abstract
The present study presents the morphology, histology, and the dynamics of vitellogenesis in females of the tick Amblyomma triste. The ovary in this species is of the panoistic type, therefore it lacks nurse cells. It is composed of a layer of epithelial cells that outwardly form the wall of the ovary, but also originate the pedicel, the structure that attaches the oocytes to its external margin, as well the oocytes themselves. In Amblyomma triste, the oocytes develop in four synchronic stages, which differs from the process in other tick species. The classification of the stages of the oocytes was carried out based on the presence of four morphologic characteristics: cytoplasm appearance; site of the germ vesicle; presence, quantity, and constitution of the yolk granules and presence of chorium.
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Affiliation(s)
- Patrícia Rosa de Oliveira
- Departamento de Biologia, I.B., UNESP, Av. 24 A, no 1515, Cx. Postal 199, CEP 13506-900, Rio Claro, SP, Brazil
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de Oliveira PR, Bechara GH, Denardi SE, Nunes ET, Camargo Mathias MI. Morphological characterization of the ovary and oocytes vitellogenesis of the tick Rhipicephalus sanguineus (Latreille, 1806) (Acari: Ixodidae). Exp Parasitol 2005; 110:146-56. [PMID: 15888297 DOI: 10.1016/j.exppara.2004.12.016] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2004] [Revised: 12/15/2004] [Accepted: 12/16/2004] [Indexed: 11/24/2022]
Abstract
This study presents the morphology of the ovary, as well as the process of the vitellogenesis in oocytes of the tick Rhipicephalus sanguineus. The ovary of these individuals is of the panoistic type; therefore, it lacks nurse cells. This organ consists of a single tubular structure, continuous, and composed of a wall formed by small epithelial cells with rounded nuclei which delimit the lumen. The oocytes in the different developmental stages in this tick species were classified into five stages (I-V). They remain attached to the ovary during vitellogenesis by a cellular pedicel and afterwards the mature oocytes (stage V) are released into the ovary lumen.
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Affiliation(s)
- Patrícia Rosa de Oliveira
- Departamento de Biologia, Instituto de Biociências, UNESP, Av. 24 A, no. 1515, Cx. Postal 199, Rio Claro, SP 13506-900, Brazil
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de Oliveira PR, Bechara GH, Denardi SE, Saito KC, Nunes ET, Szabó MPJ, Mathias MIC. Comparison of the external morphology of Rhipicephalus sanguineus (Latreille, 1806) (Acari: Ixodidae) ticks from Brazil and Argentina. Vet Parasitol 2005; 129:139-47. [PMID: 15817214 DOI: 10.1016/j.vetpar.2005.01.001] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/01/2005] [Indexed: 11/24/2022]
Abstract
In the present study the external morphology of semi-engorged Rhipicephalus sanguineus females ticks from Brazil and Argentina were compared by scanning electron microscopy. Many differences were detected among the R. sanguineus collected at the two localities, such as body size, shape of the genital pore, and morphology of the sensory structures. All these characteristics are fundamental for the diagnosis of species of the genus Rhipicephalus and thus indicate the need for further comparisons and, the taxonomical revision of this species of tick in the Neotropics.
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Affiliation(s)
- Patrícia Rosa de Oliveira
- Departamento de Biologia, I.B., Universidade Estadual Paulista Júlio de Mesquita Filho, UNESP, Av. 24A 1515, Cx. Postal 199, CEP 13506-900, Rio Claro, SP, Brazil
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Denardi SE, Bechara GH, Oliveira PRD, Nunes ET, Saito KC, Mathias MIC. Morphological characterization of the ovary and vitellogenesis dynamics in the tick Amblyomma cajennense (Acari: Ixodidae). Vet Parasitol 2004; 125:379-95. [PMID: 15482894 DOI: 10.1016/j.vetpar.2004.07.015] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2004] [Accepted: 07/26/2004] [Indexed: 11/22/2022]
Abstract
In this work we describe the internal morphology of the female reproductive system of the cayenne tick Amblyomma cajennense. This system is represented by a panoistic ovary, which lacks nurse cells in the germarium. This ovary consists of a single tube, in which a large number of oocytes develop asynchronously, thus accompanying the processes of yolk deposition in the oocytes. The oocytes were classified into stages that varied from I to V, according to: cytoplasm appearance, presence of the germ vesicle, presence of yolk granules, and presence of chorion. The study of vitellogenesis dynamics suggest that the yolk elements are deposited in the oocyte following a preferencial sequence, in which the lipids are the first to appear, followed by proteins an finally by the carbohydrates. In this way the yolk of A. cajennense ticks have these three elements that may be free in the cytoplasm or chemically bounded forming glycoprotein or lipoprotein complexes.
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Affiliation(s)
- Sandra Eloisi Denardi
- Departamento de Biologia, I.B., Universidade Estadual Paulista Júlio de Mesquita Filho, UNESP, Av. 24A no. 1515- Cx. Postal 199 CEP, 13506-900 Rio Claro, SP, Brazil
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