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Archives of Insect Biochemistry and Physiology

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https://www.readbyqxmd.com/read/28266058/chemicals-isolated-from-justicia-adhatoda-linn-reduce-fitness-of-the-mosquito-aedes-aegypti-l
#1
Annamalai Thanigaivel, Sengottayan Senthil-Nathan, Prabhakaran Vasantha-Srinivasan, Edward-Sam Edwin, Athirstam Ponsankar, Selvaraj Selin-Rani, Venkatraman Pradeepa, Muthiah Chellappandian, Kandaswamy Kalaivani, Ahmed Abdel-Megeed, Raman Narayanan, Kadarkarai Murugan
Extracts from Justicia adhatoda L. (Acanthaceae) strongly reduced the fitness of the mosquito, Aedes aegypti Linn. The methanolic extracts inhibited several enzymes responsible for protecting insects from oxidative and other damage, including glutathione-S-transferase, superoxide dismutase, cytochrome P450, and α- and β-esterases. They increased repellency (maximum repellency at 100 ppm) in host-seeking adult females using the "arm-in cage assay." Histopathological examination showed the extracts led to serious midgut cell damage...
March 7, 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/28251694/knockdown-of-a-putative-argininosuccinate-lyase-gene-reduces-arginine-content-and-impairs-nymphal-development-in-nilaparvata-lugens
#2
San-Yue Yuan, Guo-Qing Li, Pin-Jun Wan, Qiang Fu, Feng-Xiang Lai, Li-Li Mu
Nilaparvata lugens is a typical phloem feeder. Rice phloem is high in simple sugars and very low in essential amino acids. Nilaparvata lugens harbors an ascomycete Entomomyces delphacidicola that hypothetically biosynthesizes several amino acids to meet the nutrition requirement of the planthopper. Among these amino acids, here, we focused on arginine biosynthesis. A complete cDNA of an E. delphacidicola gene, arginine-succinate lyase, EdArg4, the last step in arginine biosynthesis, was obtained. RNAi-mediated suppression of EdArg4 reduced arginine content in the hemolymph, and decreased the expression of several arginine biosynthesis genes...
March 2, 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/28225562/the-adipokinetic-hormone-of-mantodea-in-comparison-to-other-dictyoptera
#3
COMPARATIVE STUDY
Gerd Gäde, Heather G Marco
Six species of the order Mantodea (praying mantises) are investigated for the presence and sequence of putative adipokinetic hormones (AKHs). The selected species span a wide evolutionary range of various families and subfamilies of the clade Mantodea. The corpora cardiaca of the different species are dissected, methanolic extracts prepared, peptides separated by liquid chromatography, and AKHs detected and sequenced by ion trap mass spectrometry. All six species investigated contain an octapeptide with the primary structure pGlu-Val-Asn-Phe-Thr-Pro-Asn-Trp amide, which is code-named Emppe-AKH and had been found earlier in three other species of Mantodea...
March 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/28206711/localization-patterns-of-dopamine-active-transporter-synthesizing-cells-during-development-of-brine-shrimp
#4
Bo Yong Kim, Gyeong Hee Shin, In Soo Lee, Suhng Wook Kim, Ho Seung Kim, Jin Kwan Kim, Seung Gwan Lee
There have been many studies on dopamine active transporter (DAT) in humans and laboratory animals; however, there is a lack of information on DAT in brine shrimp. In this study, we demonstrated the neuronal and nonneuronal characteristics of DAT-synthesizing (DAT(+) cells) during development of brine shrimp. In neuronal cells, the DAT(+) neurons in the central body and lobes of a protocerebrum (PC) controlled the deutocerebrum. The sensory cells of nauplius eyes projected their decussated axons to the PC, and the DAT(+) cells at the posterior region were associated with migration and control of the 10 posterior neurons during the early nauplius stage...
March 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/28206701/differential-responses-of-helicoverpa-armigera-c-type-immunlectin-genes-to-the-endoparasitoid-campoletis-chlorideae
#5
Xiong-Ya Wang, Su-Fen Bai, Xin Li, Shi-Heng An, Xin-Ming Yin, Xian-Chun Li
The C-type lectins mediate nonself recognition in insects. The previous studies focused on host immunlectin response to bacterial infection; however, the molecular basis of immunlectin reactions to endoparasitoids has not been elucidated. The present study investigated the effect of parasitization by Campoletis chlorideae on hemagglutination activity (HA; defined as the ability of lectin to agglutinate erythrocytes or other cells), and transcriptional expression of C-type immunlectin genes in the larval host, Helicoverpa armigera...
March 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/28195667/rna-interference-of-carboxyesterases-causes-nymph-mortality-in-the-asian-citrus-psyllid-diaphorina-citri
#6
Abdelaziz Kishk, Helmy A I Anber, Tsamoh K AbdEl-Raof, AbdEl-Hakeem D El-Sherbeni, Sobhy Hamed, Siddarame Gowda, Nabil Killiny
Asian citrus psyllid, Diaphorina citri Kuwayama (Hemiptera: Liviidae), is an important pest of citrus. In addition, D. citri is the vector of Huanglongbing, a destructive disease in citrus, also known as citrus greening disease caused by Candidatus Liberibacter asiaticus. Huanglongbing causes huge losses for citrus industries. Insecticide application for D. citri is the major strategy to prevent disease spread. The heavy use of insecticides causes development of insecticide resistance. We used RNA interference (RNAi) to silence genes implicated in pesticide resistance in order to increase the susceptibility...
March 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/28134485/introduction
#7
David Stanley
No abstract text is available yet for this article.
February 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/28134484/molecular-cloning-expression-profile-odorant-affinity-and-stability-of-two-odorant-binding-proteins-in-macrocentrus-cingulum-brischke-hymenoptera-braconidae
#8
Tofael Ahmed, Tiantao Zhang, Zhenying Wang, Kanglai He, Shuxiong Bai
The polyembryonic endoparasitoid wasp Macrocentrus cingulum Brischke (Hymenoptera: Braconidae) is deployed successfully as a biocontrol agent for corn pest insects from the Lepidopteran genus Ostrinia in Europe and throughout Asia, including Japan, Korea, and China. The odorants are recognized, bound, and solubilized by odorant-binding protein (OBP) in the initial biochemical recognition steps in olfaction that transport them across the sensillum lymph to initiate behavioral response. In the present study, we examine the odorant-binding effects on thermal stability of McinOBP2, McinOBP3, and their mutant form that lacks the third disulfide bonds...
February 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/28094878/characterization-of-cellulose-degrading-bacteria-from-the-larval-gut-of-the-white-grub-beetle-lepidiota-mansueta-coleoptera-scarabaeidae
#9
Gautam Handique, Amrita Phukan, Badal Bhattacharyya, Abu Adil Lutful Haque Baruah, Syed Wasifur Rahman, Rajen Baruah
The goal of this study is to identify and characterize the cellulose degrading microorganisms in the larval gut of the white grub beetle, Lepidiota mansueta. Thirty bacterial strains were isolated and tested for cellulolytic activity using soluble carboxymethyl cellulose (CMC) degrading assays. Of these strains, five (FGB1, FB2, MB1, MB2, and HB1) degrade cellulose. Cellulolytic activity was determined based on formation of clear zone and cellulolytic index on CMC plate media. The highest cellulolytic index (2...
February 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/28094453/down-regulation-of-a-chitin-synthase-a-gene-by-rna-interference-enhances-pathogenicity-of-beauveria-bassiana-anu1-against-spodoptera-exigua-h%C3%A3-bner
#10
Jung-Bok Lee, Hyun Soo Kim, Youngjin Park
Chitin synthase (CHS) is an important enzymatic component, which is required for chitin formation in the cuticles and cuticular linings of other tissues in insects. CHSs have been divided into two classes, classes A and B, based on their amino acid sequence similarities and functions. Class A CHS (CHS-A) is specifically expressed in the epidermis and related ectodermal cells such as tracheal cells, while class B CHS (CHS-B) is expressed in gut epithelial cells that produce peritrophic matrices. In this study, we cloned the CHS-A gene from the beet armyworm, Spodoptera exigua (SeCHS-A)...
February 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/28094452/the-dipteran-parasitoid-exorista-bombycis-induces-pro-and-anti-oxidative-reactions-in-the-silkworm-bombyx-mori-enzymatic-and-genetic-analysis
#11
Pooja Makwana, Appukuttan Nair R Pradeep, Shambhavi P Hungund, Kangayam M Ponnuvel, Kanika Trivedy
Hymenopteran parasitoids inject various factors including polydnaviruses along with their eggs into their host insects that suppress host immunity reactions to the eggs and larvae. Less is known about the mechanisms evolved in dipteran parasitoids that suppress host immunity. Here we report that the dipteran, Exorista bombycis, parasitization leads to pro-oxidative reactions and activation of anti-oxidative enzymes in the silkworm Bombyx mori larva. We recorded increased activity of oxidase, superoxide dismutase, thioredoxin peroxidase, catalase, glutathione-S-transferase (GST), and peroxidases in the hemolymph plasma, hemocytes, and fat body collected from B...
February 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/28042896/identification-and-characterization-of-micrornas-expressed-in-antennae-of-holotrichia-parallela-motschulsky-and-their-possible-roles-in-olfactory-regulation
#12
Shang Wang, Jian-Kun Yi, Shuang Yang, Yan Liu, Ju-Hong Zhang, Jing-Hui Xi
MicroRNAs (miRNAs) are small noncoding RNAs that play posttranscriptional, regulatory roles in various biological processes. However, there has been limited investigation into the potential function of miRNAs in olfaction. The coleopteran Holotrichia parallela is an economically important pest, and miRNAs have been identified in only one coleopteran (Tribolium castaneum). Therefore, this study was conducted to identify miRNAs expressed in the antennae of H. parallela and obtain insights into their possible roles in olfaction...
January 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/28019702/alkaline-serine-proteases-from-helicoverpa-armigera-potential-candidates-for-industrial-applications
#13
Shaik Mohammad Akbar, Hari Chand Sharma
We characterized trypsin- and chymotrypsin-like serine alkaline proteases from cotton bollworm, Helicoverpa armigera, for their probable potential application as additives in various bio-formulations. Purification was achieved by using hydroxylapatite, DEAE sephadex and CM sephadex columns, which resulted in increased enzyme activity by 13.76- and 14.05-fold for trypsin and chymotrypsin, respectively. Michaelis-Menten constants (Km ) for substrates of trypsin and chymotrypsin, BApNA and SAAPFpNA, were found to be 1...
January 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/28008655/characterization-and-functional-study-of-a-cecropin-like-peptide-from-the-chinese-oak-silkworm-antheraea-pernyi
#14
Shao-Liang Fang, Lei Wang, Qi Fang, Chen Chen, Xiao-San Zhao, Cen Qian, Guo-Qing Wei, Bao-Jian Zhu, Chao-Liang Liu
In present study, a Cecropin-like peptide from Antheraea pernyi (ApCec) was cloned and characterized. The full-length ApCec cDNA encoded a protein with 64 amino acids including a putative 22-amino-acid signal peptide, a 4-amino-acid propeptide, and a 38-amino-acid mature peptide. ApCec gene was highly expressed in Malpighian tubules of A. pernyi after induction for 24 h by Escherichia coli in PBS. Pro-ApCec (including propeptide and mature peptide) and M-ApCec (just mature peptide) were synthesized chemically and analyzed by HPLC and mass spectroscopy...
January 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/28000948/the-expression-patterns-of-the-clock-genes-period-and-timeless-are-affected-by-photoperiod-in-the-mediterranean-corn-stalk-borer-sesamia-nonagrioides
#15
Dimitrios Kontogiannatos, Theodoros Gkouvitsas, Anna Kourti
To obtain clues to the link between the molecular mechanism of circadian and photoperiod clocks, we cloned two circadian clock genes, period (per) and timeless (tim) from the moth Sesamia nonagrioides, which undergoes facultative diapause controlled by photoperiod. Sequence analysis revealed a high degree of conservation among the compared insects fοr both genes. We also investigated the expression patterns of per and tim in brains of larvae growing under 16L:8D (long days), constant darkness (DD) and 10L:14D (short days) conditions by qPCR assays...
January 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/27696504/green-tea-polyphenols-require-the-mitochondrial-iron-transporter-mitoferrin-for-lifespan-extension-in-drosophila-melanogaster
#16
Terry E Lopez, Hoang M Pham, Benjamin V Nguyen, Yerazik Tahmasian, Shannon Ramsden, Volkan Coskun, Samuel E Schriner, Mahtab Jafari
Green tea has been found to increase the lifespan of various experimental animal models including the fruit fly, Drosophila melanogaster. High in polyphenolic content, green tea has been shown to reduce oxidative stress in part by its ability to bind free iron, a micronutrient that is both essential for and toxic to all living organisms. Due to green tea's iron-binding properties, we questioned whether green tea acts to increase the lifespan of the fruit fly by modulating iron regulators, specifically, mitoferrin, a mitochondrial iron transporter, and transferrin, found in the hemolymph of flies...
December 2016: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/27588824/ingestion-of-the-anti-bacterial-agent-gemifloxacin-mesylate-leads-to-increased-gst-activity-and-peroxidation-products-in-hemolymph-of-galleria-mellonella-l-lepidoptera-pyralidae
#17
Meltem Erdem, Ceyhun Küçük, Ender Büyükgüzel, Kemal Büyükgüzel
Gemifloxacin mesylate (GEM) is a synthetic, fourth-generation fluoroquinolone antibacterial antibiotic that has a broad spectrum of activity against bacteria. GEM inhibits DNA synthesis by inhibiting DNA gyrase and topoisomerase IV activities. Recent research into insect nutrition and mass-rearing programs, in which antibiotics are incorporated into the culture media to maintain diet quality, raised a question of whether clinical antibiotics influence the health or biological performance of the insects that ingest these compounds...
December 2016: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/27509382/dietary-silver-nanoparticles-reduce-fitness-in-a-beneficial-but-not-pest-insect-species
#18
Zahra Afrasiabi, Holly J R Popham, David Stanley, Dhananjay Suresh, Kristen Finley, Jonelle Campbell, Raghuraman Kannan, Anandhi Upendran
Silver nanoparticles (AgNPs) have antimicrobial and insecticidal properties and they have been considered for their potential use as insecticides. While they do, indeed, kill some insects, two broader issues have not been considered in a critical way. First, reports of insect-lethal AgNPs are often based on simplistic methods that yield nanoparticles of nonuniform shapes and sizes, leaving questions about the precise treatments test insects experienced. Second, we do not know how AgNPs influence beneficial insects...
December 2016: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/27501306/nonsulfated-sulfakinin-changes-metabolic-parameters-of-insect-fat-body-mitochondria
#19
Malgorzata Slocinska, Nina Antos-Krzeminska, Grzegorz Rosinski, Wieslawa Jarmuszkiewicz
We investigated the effect of neuropeptide, the nonsulfated sulfakinin (SK) Zopat-SK-1 (pETSDDYGHLRFa) on the mitochondrial oxidative metabolism in the Zophobas atratus larval fat body. Mitochondria were isolated from beetle fat bodies 2 and 24 h after hormone injection. The administration of 20 pmol of Zopat-SK-1 to feeding larvae led to decreased mitochondrial oxidative activities in larval fat body. Diminished activities of citrate synthase and the cytochrome pathway, that is, nonphosphorylating and phosphorylating respiration during succinate oxidation, were observed...
December 2016: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/27592842/identification-and-expression-analysis-of-two-14-3-3-proteins-in-the-mosquito-aedes-aegypti-an-important-arboviruses-vector
#20
Abel Trujillo-Ocampo, Febe Elena Cázares-Raga, Antonio Celestino-Montes, Leticia Cortés-Martínez, Mario H Rodríguez, Fidel de la Cruz Hernández-Hernández
The 14-3-3 proteins are evolutionarily conserved acidic proteins that form a family with several isoforms in many cell types of plants and animals. In invertebrates, including dipteran and lepidopteran insects, only two isoforms have been reported. 14-3-3 proteins are scaffold molecules that form homo- or heterodimeric complexes, acting as molecular adaptors mediating phosphorylation-dependent interactions with signaling molecules involved in immunity, cell differentiation, cell cycle, proliferation, apoptosis, and cancer...
November 2016: Archives of Insect Biochemistry and Physiology
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