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[PMID]:29372799
[Au] Autor:Andreenkova OV; Adonyeva NV; Eremina MA; Gruntenko NE; Rauschenbach IY
[Ti] Título:The insulin-like receptor gene expression in the tissues synthesizing gonadotropic hormones at sexual maturation of Drosophila melanogaster females].
[So] Source:Genetika;52(11):1342-4, 2016 Nov.
[Is] ISSN:0016-6758
[Cp] País de publicação:Russia (Federation)
[La] Idioma:eng; rus
[Ab] Resumo:The insulin/insulin-like growth factor signaling pathway is involved in the regulation of the synthesis of insect gonadotropic hormones, juvenile (JH) and 20-hydroxyecdysone (20E). We carried out the immunohistochemical analysis of the insulin receptor (InR) expression in the corpus allatum (the JH-producing gland) and in the ovarian follicular cells (a site for the synthesis of 20E precursor, ecdysone) in the process of sexual maturation of D. melanogaster females and examined the influence of exogenous JH on the InR expression in these tissues. For the first time, it was demonstrated that InR was expressed in follicular cells and that its expression in corpus allatum and follicular cells of Drosophila females was stage-specific, i.e., the expression intensity in young females greatly exceeded that in mature individuals. We also found a negative feedback loop in the regulation of JH levels by the insulin signaling pathway in Drosophila adults: the experimental increase in the JH titers in young females dramatically reduced the InR expression intensity in corpus allatum and follicular cells.
[Mh] Termos MeSH primário: Proteínas de Drosophila/biossíntese
Regulação da Expressão Gênica/fisiologia
Hormônios Juvenis/metabolismo
Ovário/metabolismo
Receptores Proteína Tirosina Quinases/biossíntese
Maturidade Sexual/fisiologia
[Mh] Termos MeSH secundário: Animais
Drosophila melanogaster
Feminino
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Drosophila Proteins); 0 (Juvenile Hormones); EC 2.7.10.1 (InR protein, Drosophila); EC 2.7.10.1 (Receptor Protein-Tyrosine Kinases)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180205
[Lr] Data última revisão:
180205
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180127
[St] Status:MEDLINE


  2 / 2904 MEDLINE  
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[PMID]:29017816
[Au] Autor:Chang J; Wang H; Xu P; Guo B; Li J; Wang Y; Li W
[Ad] Endereço:Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing, 100085, China; University of Chinese Academy of Sciences, Yuquan RD 19 a, Beijing, 100049, China.
[Ti] Título:Oral and dermal diflubenzuron exposure causes a hypothalamic-pituitary-thyroid (HPT) axis disturbance in the Mongolian racerunner (Eremias argus).
[So] Source:Environ Pollut;232:338-346, 2018 Jan.
[Is] ISSN:1873-6424
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Diflubenzuron (DFB) is a potential endocrine-disrupting chemical. However, its thyroid endocrine effect on reptiles has not been reported. In this study, immature lizards (Eremias argus) were exposed to 20 mg kg DFB once a week for 42 days through oral or dermal routes. Their body weight, plasma thyroid hormone levels, thyroid gland histology and the transcription of hypothalamic-pituitary-thyroid (HPT) axis-related genes in different tissues were assessed to explore the effects of DFB on the HPT axis of lizards. The body weight decreased significantly only after the dermal exposure to DFB. Triiodothyronine (T3) to thyroxine (T4) ratio in the male plasma also significantly increased after the dermal exposure. After oral exposure, the activity of thyroid gland was positively related to the thyroid hormone levels. Furthermore, the alterations in thyroid hormone levels affected the HPT axis-related gene expression, which was tissue dependent and sexually selected. The thyroid hormone receptor genes (trα and trß) in the brain and thyroid were more sensitive to oral exposure. However, only the dermal treatment affected the trα, trß and type 2 deiodinase (dio2) genes in the male liver. These results suggest that DFB exposure caused sex-specific changes in the thyroid function of lizards, and the dermal treatment may be an important route for the risk assessment of reptiles.
[Mh] Termos MeSH primário: Diflubenzuron/toxicidade
Disruptores Endócrinos/toxicidade
Hormônios Juvenis/toxicidade
Lagartos/fisiologia
[Mh] Termos MeSH secundário: Animais
Disruptores Endócrinos/metabolismo
Hipotálamo/efeitos dos fármacos
Lagartos/metabolismo
Masculino
Hipófise/efeitos dos fármacos
Glândula Tireoide/metabolismo
Hormônios Tireóideos/metabolismo
Tiroxina/sangue
Testes de Toxicidade
Tri-Iodotironina/sangue
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Endocrine Disruptors); 0 (Juvenile Hormones); 0 (Thyroid Hormones); 06LU7C9H1V (Triiodothyronine); J76U6ZSI8D (Diflubenzuron); Q51BO43MG4 (Thyroxine)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180122
[Lr] Data última revisão:
180122
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171012
[St] Status:MEDLINE


  3 / 2904 MEDLINE  
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[PMID]:27776238
[Au] Autor:Ono ÉK; Zanardi OZ; Aguiar Santos KF; Yamamoto PT
[Ad] Endereço:Department of Entomology and Acarology, "Luiz de Queiroz" College of Agriculture/University of Sao Paulo (ESALQ/USP), 13418-900, Piracicaba, Sao Paulo, Brazil.
[Ti] Título:Susceptibility of Ceraeochrysa cubana larvae and adults to six insect growth-regulator insecticides.
[So] Source:Chemosphere;168:49-57, 2017 Feb.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The impacts of six insect growth-regulators were assessed on the predator Ceraeochrysa cubana (Hagen) larvae and adults. Our results showed that diflubenzuron, lufenuron and pyriproxyfen caused 100% larva mortality, whereas buprofezin, methoxyfenozide and tebufenozide were similar to control treatment. In comparison to the control, buprofezin prolonged the duration of larval stage, while methoxyfenozide and tebufenozide reduced the predator larva development time. Buprofezin, methoxyfenozide and tebufenozide did not affect the C. cubana duration and survival of pupal stage, fecundity and fertility. However, methoxyfenozide and tebufenozide reduced predator female and male longevities. Based on a reduction coefficient, diflubenzuron, lufenuron and pyriproxyfen were highly harmful to first instar larvae, while buprofezin, methoxyfenozide and tebufenozide were considered slightly harmful to the predator. Estimating the life table parameters, our results showed that buprofezin, methoxyfenozide and tebufenozide reduced the C. cubana R , r and λ. In comparison to the control, buprofezin prolonged the T and methoxyfenozide and tebufenozide shortened the predator T. In adults, our results showed that the insecticides did not cause significant mortality, but diflubenzuron, lufenuron and pyriproxyfen reduced the C. cubana fecundity and longevity. Diflubenzuron and lufenuron also reduced the C. cubana fertility. Based on a reduction coefficient, diflubenzuron and lufenuron were highly harmful to C. cubana adults, while pyriproxyfen was slightly harmful and buprofezin, methoxyfenozide and tebufenozide were considered harmless to the predator. Therefore, insect growth-regulators affect the C. cubana biological or populational parameters, and they can harm the integrated pest management programs that aim the predator conservation and/or augmentation in agroecosystems.
[Mh] Termos MeSH primário: Insetos/efeitos dos fármacos
Inseticidas/toxicidade
Hormônios Juvenis/toxicidade
Controle Biológico de Vetores
[Mh] Termos MeSH secundário: Animais
Brasil
Feminino
Insetos/crescimento & desenvolvimento
Insetos/fisiologia
Larva/efeitos dos fármacos
Larva/crescimento & desenvolvimento
Larva/fisiologia
Masculino
Comportamento Predatório/efeitos dos fármacos
Pupa/efeitos dos fármacos
Pupa/crescimento & desenvolvimento
Pupa/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Insecticides); 0 (Juvenile Hormones)
[Em] Mês de entrada:1702
[Cu] Atualização por classe:171212
[Lr] Data última revisão:
171212
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161025
[St] Status:MEDLINE


  4 / 2904 MEDLINE  
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[PMID]:28869353
[Au] Autor:Su X; Yang X; Li J; Xing L; Liu H; Chen J
[Ad] Endereço:Shaanxi Key Laboratory for Animal Conservation, Northwest University, Xi'an, China.
[Ti] Título:The transition path from female workers to neotenic reproductives in the termite Reticulitermes labralis.
[So] Source:Evol Dev;19(4-5):218-226, 2017 Jul.
[Is] ISSN:1525-142X
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Termite workers are characterized by unique flexibility in that a worker can develop in one of three ways: remain a worker, become a soldier within two successive moults, or become a neotenic reproductive (NR) within a single moult. However, is it true that workers can transform into NRs within a single moult? Actually, the developmental pathways of workers turning into NRs remains unclear. In this study, we show for the first time that the female workers of Reticulitermes labralis develop into NRs after a pre-NRs stage. We found that a female worker became a NR after two successive moults, whereas the male workers copulated directly with queens without undergoing any moults. After the first moult led the female workers into the pre-NR stage, the length of their abdomens, seventh sternites and ovaries significantly increased. After the second moult from the pre-NRs stage into NRs, the follicle cells returned to normal, and a few oocytes and follicle cells underwent apoptosis. These results demonstrated that the female pre-NR type was a transitional type during the development of female workers to the NR caste, and the starting point for oogenesis resumption was the NR stage. We confirmed there were fundamental differences in the reproductive pathway of the male and female workers. Therefore, we determined that the transformation process of the female NRs from workers may be a very complex process, and the reproductive biology of the workers has great potential to provide important and spectacular insights into the evolution strategy of termites.
[Mh] Termos MeSH primário: Isópteros/fisiologia
Hormônios Juvenis/metabolismo
Oócitos/citologia
[Mh] Termos MeSH secundário: Animais
Feminino
Isópteros/citologia
Isópteros/crescimento & desenvolvimento
Masculino
Oogênese
Oviposição
Reprodução
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Juvenile Hormones)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170929
[Lr] Data última revisão:
170929
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170905
[St] Status:MEDLINE
[do] DOI:10.1111/ede.12229


  5 / 2904 MEDLINE  
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Bonetti, Ana Maria
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[PMID]:28800885
[Au] Autor:Cardoso-Júnior CAM; Silva RP; Borges NA; de Carvalho WJ; Walter SL; Simões ZLP; Bitondi MMG; Ueira Vieira C; Bonetti AM; Hartfelder K
[Ad] Endereço:Departamento de Biologia Celular, Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Avenida Bandeirantes 3900, 14049-900 Ribeirão Preto, SP, Brazil. Electronic address: carloscardoso.bio@usp.br.
[Ti] Título:Methyl farnesoate epoxidase (mfe) gene expression and juvenile hormone titers in the life cycle of a highly eusocial stingless bee, Melipona scutellaris.
[So] Source:J Insect Physiol;101:185-194, 2017 Aug.
[Is] ISSN:1879-1611
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:In social insects, juvenile hormone (JH) has acquired novel functions related to caste determination and division of labor among workers, and this is best evidenced in the honey bee. In contrast to honey bees, stingless bees are a much more diverse group of highly eusocial bees, and the genus Melipona has long called special attention due to a proposed genetic mechanism of caste determination. Here, we examined methyl farnesoate epoxidase (mfe) gene expression, encoding an enzyme relevant for the final step in JH biosynthesis, and measured the hemolymph JH titers for all life cycle stages of Melipona scutellaris queens and workers. We confirmed that mfe is exclusively expressed in the corpora allata. The JH titer is high in the second larval instar, drops in the third, and rises again as the larvae enter metamorphosis. During the pupal stage, mfe expression is initialy elevated, but then gradually drops to low levels before adult emergence. No variation was, however, seen in the JH titer. In adult virgin queens, mfe expression and the JH titer are significantly elevated, possibly associated with their reproductive potential. For workers we found that JH titers are lower in foragers than in nurse bees, while mfe expression did not differ. Stingless bees are, thus, distinct from honey bee workers, suggesting that they have maintained the ancestral gonadotropic function for JH. Hence, the physiological circuitries underlying a highly eusocial life style may be variable, even within a monophyletic clade such as the corbiculate bees.
[Mh] Termos MeSH primário: Abelhas/genética
Proteínas de Insetos/genética
Hormônios Juvenis/metabolismo
Oxigenases/genética
[Mh] Termos MeSH secundário: Animais
Abelhas/crescimento & desenvolvimento
Abelhas/metabolismo
Feminino
Proteínas de Insetos/metabolismo
Larva/genética
Larva/metabolismo
Masculino
Oxigenases/metabolismo
Filogenia
Pupa/genética
Pupa/metabolismo
Análise de Sequência de DNA
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Insect Proteins); 0 (Juvenile Hormones); EC 1.13.- (Oxygenases); EC 1.14.14.- (methyl farnesoate epoxidase)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170928
[Lr] Data última revisão:
170928
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170813
[St] Status:MEDLINE


  6 / 2904 MEDLINE  
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[PMID]:28751377
[Au] Autor:Kim IH; Pham V; Jablonka W; Goodman WG; Ribeiro JMC; Andersen JF
[Ad] Endereço:From the Laboratory of Malaria and Vector Research, NIAID, National Institutes of Health, Rockville, Maryland 20852 and.
[Ti] Título:A mosquito hemolymph odorant-binding protein family member specifically binds juvenile hormone.
[So] Source:J Biol Chem;292(37):15329-15339, 2017 Sep 15.
[Is] ISSN:1083-351X
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Juvenile hormone (JH) is a key regulator of insect development and reproduction. In adult mosquitoes, it is essential for maturation of the ovary and normal male reproductive behavior, but how JH distribution and activity is regulated after secretion is unclear. Here, we report a new type of specific JH-binding protein, given the name mosquito juvenile hormone-binding protein (mJHBP), which circulates in the hemolymph of pupal and adult males and females. mJHBP is a member of the odorant-binding protein (OBP) family, and orthologs are present in the genomes of , , and mosquito species. Using isothermal titration calorimetry, we show that mJHBP specifically binds JH II and JH III but not eicosanoids or JH derivatives. mJHBP was crystallized in the presence of JH III and found to have a double OBP domain structure reminiscent of salivary "long" D7 proteins of mosquitoes. We observed that a single JH III molecule is contained in the N-terminal domain binding pocket that is closed in an apparent conformational change by a C-terminal domain-derived α-helix. The electron density for the ligand indicated a high occupancy of the natural 10 enantiomer of JH III. Of note, mJHBP is structurally unrelated to hemolymph JHBP from lepidopteran insects. A low level of expression of mJHBP in larvae suggests that it is primarily active during the adult stage where it could potentially influence the effects of JH on egg development, mating behavior, feeding, or other processes.
[Mh] Termos MeSH primário: Aedes/fisiologia
Proteínas de Transporte/metabolismo
Hemolinfa/metabolismo
Proteínas de Insetos/metabolismo
Hormônios Juvenis/metabolismo
Modelos Moleculares
Receptores Odorantes/metabolismo
Sesquiterpenos/metabolismo
[Mh] Termos MeSH secundário: Aedes/crescimento & desenvolvimento
Sequência de Aminoácidos
Animais
Sítios de Ligação
Proteínas de Transporte/química
Proteínas de Transporte/genética
Cristalografia por Raios X
Feminino
Regulação da Expressão Gênica no Desenvolvimento
Proteínas de Insetos/química
Proteínas de Insetos/genética
Hormônios Juvenis/química
Larva/crescimento & desenvolvimento
Larva/fisiologia
Ligantes
Masculino
Filogenia
Conformação Proteica
Pupa/crescimento & desenvolvimento
Pupa/fisiologia
Receptores Odorantes/química
Receptores Odorantes/genética
Proteínas Recombinantes/química
Proteínas Recombinantes/metabolismo
Alinhamento de Sequência
Sesquiterpenos/química
Homologia Estrutural de Proteína
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Carrier Proteins); 0 (Insect Proteins); 0 (Juvenile Hormones); 0 (Ligands); 0 (Receptors, Odorant); 0 (Recombinant Proteins); 0 (Sesquiterpenes); 0 (juvenile hormone-binding protein, insect); 0 (odorant-binding protein); 21213-74-1 (juvenile hormone II); B74U6BJ6J5 (juvenile hormone III)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170927
[Lr] Data última revisão:
170927
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170729
[St] Status:MEDLINE
[do] DOI:10.1074/jbc.M117.802009


  7 / 2904 MEDLINE  
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[PMID]:28750998
[Au] Autor:Liu H; Li HM; Yue Y; Song ZH; Wang JJ; Dou W
[Ad] Endereço:Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing 400715, China; Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
[Ti] Título:The alternative splicing of BdTai and its involvement in the development of Bactrocera dorsalis (Hendel).
[So] Source:J Insect Physiol;101:132-141, 2017 Aug.
[Is] ISSN:1879-1611
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Interest in insect metamorphosis has primarily focused on juvenile hormone (JH) and ecdysone. Compared to ecdysone signaling, the molecular action of JH is less well established because Methoprene-tolerant (Met) as the JH receptor has been identified until recently. In vitro studies have indicated that Met forms an active JH-dependent complex with one partner protein, Taiman (Tai). However, the related studies on Tai's role in insect metamorphosis are very limited. In this study, five Tai isoforms differing in C-terminal region are identified from the oriental fruit fly Bactrocera dorsalis, an important worldwide pest infesting fruits and vegetables. The spatiotemporal expression pattern analysis indicates that BdTai-A and BdTai-B are highly expressed in early larvae while BdTai-D is more abundant in middle-late larvae. Meanwhile, in vivo methoprene stress leads to dramatic expression pattern fluctuation of BdTai isoforms. The subsequent reverse genetic study reveal that all Tai isoforms (denoted as "Tai-core") depletion in larvae stage of B. dorsalis produce precocious larvae-pupae development, i.e. shortened pupation process and miniature pupae. Further knockdown of individual Tai isoform show that silence of BdTai-E causes the same phenotype as of BdTai-core RNAi. The current data suggest that BdTai-E is involved in transducing the JH signal that represses metamorphosis. Besides, isoforms should be considered when studying Tai functions.
[Mh] Termos MeSH primário: Processamento Alternativo
Regulação da Expressão Gênica no Desenvolvimento
Proteínas de Insetos/genética
Tephritidae/genética
[Mh] Termos MeSH secundário: Sequência de Aminoácidos
Animais
Clonagem Molecular
DNA Complementar/genética
DNA Complementar/metabolismo
Proteínas de Insetos/química
Proteínas de Insetos/metabolismo
Hormônios Juvenis/metabolismo
Larva/genética
Larva/crescimento & desenvolvimento
Larva/metabolismo
Metoprene/metabolismo
Filogenia
Isoformas de Proteínas/química
Isoformas de Proteínas/genética
Isoformas de Proteínas/metabolismo
Pupa/genética
Pupa/crescimento & desenvolvimento
Pupa/metabolismo
RNA Mensageiro/genética
RNA Mensageiro/metabolismo
Alinhamento de Sequência
Transdução de Sinais
Tephritidae/crescimento & desenvolvimento
Tephritidae/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Complementary); 0 (Insect Proteins); 0 (Juvenile Hormones); 0 (Protein Isoforms); 0 (RNA, Messenger); 8B830OJ2UX (Methoprene)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170928
[Lr] Data última revisão:
170928
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170729
[St] Status:MEDLINE


  8 / 2904 MEDLINE  
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[PMID]:28733163
[Au] Autor:Sugahara R; Tanaka S; Shiotsuki T
[Ad] Endereço:National Agriculture and Food Research Organization, Institute of Agrobiological Sciences, 1-2 Ohwashi, Tsukuba, Ibaraki 305-8634, Japan. Electronic address: rsugahara@affrc.go.jp.
[Ti] Título:RNAi-mediated knockdown of SPOOK reduces ecdysteroid titers and causes precocious metamorphosis in the desert locust Schistocerca gregaria.
[So] Source:Dev Biol;429(1):71-80, 2017 09 01.
[Is] ISSN:1095-564X
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The Halloween gene SPOOK (SPO) is involved in the production of the active metabolite of ecdysteroid, 20-hydroxyecdysone (20E), in insects. A previous study showed that RNAi-mediated knockdown of SPO in Schistocerca gregaria last instar nymphs markedly reduced the hemolymph 20E titer, but did not affect metamorphosis. In the present study, the effects of SPO interference on development were re-examined in this locust. Injections of SPO double-stranded RNA (dsSPO) into nymphs at mid and late instars significantly delayed nymphal development and interfered with molting. The 20E levels of dsSPO-treated nymphs were generally low, with a delayed, small peak, suggesting that disturbance of the 20E levels caused the above developmental abnormalities. A small proportion of the dsSPO-injected nymphs metamorphosed precociously, producing adults and adultoids. Precocious adults were characterized by small body size, short wings with abbreviated venation, and normal reproductive activity. Fourth instar nymphs that precociously metamorphosed at the following instar exhibited temporal expression patterns of ecdysone-induced protein 93F and the juvenile hormone (JH) early-inducible gene Krüppel homolog 1 similar to those observed at the last instar in normal nymphs. Adultoids displayed mating behavior and adultoid females developed eggs, but never laid eggs. JH injection around the expected time of the 20E peak in the dsSPO-injected nymphs completely inhibited the appearance of adultoids, suggesting that appearance of adultoids might be due to a reduced titer of JH rather than of 20E. These results suggest that SPO plays an important role in controlling morphogenesis, metamorphosis, and reproduction in S. gregaria.
[Mh] Termos MeSH primário: Clima Desértico
Ecdisteroides/metabolismo
Técnicas de Silenciamento de Genes
Gafanhotos/crescimento & desenvolvimento
Gafanhotos/genética
Proteínas de Insetos/genética
Metamorfose Biológica
Interferência de RNA
[Mh] Termos MeSH secundário: Animais
Regulação da Expressão Gênica no Desenvolvimento/efeitos dos fármacos
Gafanhotos/efeitos dos fármacos
Hemolinfa/metabolismo
Proteínas de Insetos/metabolismo
Hormônios Juvenis/administração & dosagem
Hormônios Juvenis/farmacologia
Larva/efeitos dos fármacos
Metamorfose Biológica/efeitos dos fármacos
Metamorfose Biológica/genética
Muda/efeitos dos fármacos
RNA de Cadeia Dupla/metabolismo
Asas de Animais/efeitos dos fármacos
Asas de Animais/crescimento & desenvolvimento
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Ecdysteroids); 0 (Insect Proteins); 0 (Juvenile Hormones); 0 (RNA, Double-Stranded)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171111
[Lr] Data última revisão:
171111
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170723
[St] Status:MEDLINE


  9 / 2904 MEDLINE  
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[PMID]:28623148
[Au] Autor:Bachmann GE; Devescovi F; Nussenbaum AL; Cladera JL; Fernández PC; Vera MT; Teal PEA; Segura DF
[Ad] Endereço:Instituto de Genética "E.A. Favret", Instituto Nacional de Tecnología Agropecuaria (INTA), Nicolas Repetto y de los Reseros s/n, Hurlingham, 1686 Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2290, Ciudad Autónoma de Buenos Aires C1425FQB,
[Ti] Título:Male sexual enhancement after methoprene treatment in Anastrepha fraterculus (Diptera: Tephritidae): A sustained response that does not fade away after sexual maturation.
[So] Source:J Insect Physiol;101:7-14, 2017 Aug.
[Is] ISSN:1879-1611
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The juvenile hormone (JH) of insects triggers physiological changes related to reproduction in adults of both sexes. Methoprene is a sesquiterpene with some effects that are analogous to those of JH. Treatments with methoprene accelerate sexual maturation in males of the South American fruit fly Anastrepha fraterculus, giving young males a mating advantage over non-treated males of the same age. Here, we evaluated the effects of methoprene treatment on A. fraterculus males after the sexual maturation phase and tested whether this compound provides a long-term mating advantage. Moreover, we took the first step to unravel the mechanisms that underlie male sexual enhancement. We treated males 1day or 8days after adult emergence and compared mate choice between recently matured (young) females and females that had been mature for ca. 10days (aged females). We also addressed methoprene treatment effects on male sexual signalling. We found that methoprene treatment enhanced male sexual competitiveness even after the sexual maturation phase, and the effect did not decrease until males were older than 20days. However, when methoprene treatment was carried out close to sexual maturity, the mating enhancement was no longer observed, suggesting a non-immediate effect and excluding the possibility that methoprene acts as a pheromonal compound. Young and aged females tended to mate more frequently with treated-males. This might indicate that in a context of sexual selection, the potential benefits associated with reproductive success would be similar for females of both ages. Treated males released larger amounts of pheromonal compounds than non-treated males, but their courtship behaviour was not altered to the same extent, suggesting that methoprene treatment may accelerate differently the components of male courtship. We discuss potential benefits of using methoprene to increase the efficiency of the sterile insect technique, which is an environmentally safe method to control this important South American fruit pest.
[Mh] Termos MeSH primário: Hormônios Juvenis/farmacologia
Metoprene/farmacologia
Comportamento Sexual Animal/efeitos dos fármacos
Maturidade Sexual
Tephritidae/efeitos dos fármacos
Tephritidae/fisiologia
[Mh] Termos MeSH secundário: Animais
Feminino
Masculino
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Juvenile Hormones); 8B830OJ2UX (Methoprene)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170928
[Lr] Data última revisão:
170928
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170618
[St] Status:MEDLINE


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[PMID]:28595288
[Au] Autor:Li Y; Zhang Y; Liu X; Guo H
[Ad] Endereço:Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Weigang No. 1, Nanjing, 210095, China.
[Ti] Título:Does Resistance to Buprofezin Improve Heat and Cold Tolerance of Laodelphax striatellus (Hemiptera: Delphacidae)?
[So] Source:Environ Entomol;46(4):988-994, 2017 08 01.
[Is] ISSN:1938-2936
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:There is ample evidence that insecticide resistance causes fitness costs and benefits in pests, while the impact of insecticide resistance on thermotolerance of pests is mostly unclear. The Laodelphax striatellus (Fallén), is an important rice insect pest, which has developed resistance to buprofezin in China. Here, we investigated differences in heat tolerance and cold tolerance among L. striatellus lines with variable buprofezin resistance. The lethal time for 50% of the individuals to die (LT50) at 40 °C increased with an increase in buprofezin resistance level, whereas both the survival rate under -22 °C and the supercooling point of planthoppers did not differ significantly between resistant and susceptible strains. The metabolic enzyme carboxylesterase was found to have an association with buprofezin resistance. Our research showed that buprofezin resistance was positively related with heat tolerance in L. striatellus, but it had no effect on cold tolerance. Insecticide resistance in L. striatellus may therefore have broader implications for the ecology of L. striatellus, and the management of buprofezin resistance in this pest may be challenging.
[Mh] Termos MeSH primário: Aclimatação
Resistência a Medicamentos/fisiologia
Hemípteros/fisiologia
Hormônios Juvenis/farmacologia
Tiadiazinas/farmacologia
[Mh] Termos MeSH secundário: Animais
Temperatura Baixa
Hemípteros/efeitos dos fármacos
Termotolerância
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Juvenile Hormones); 0 (Thiadiazines); 3B8KGI239I (buprofezin)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:171126
[Lr] Data última revisão:
171126
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170609
[St] Status:MEDLINE
[do] DOI:10.1093/ee/nvx101



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