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Куркумин влияет на синтез хитина в Aedes aegypti: вычислительное и экспериментальное исследование.

На протяжении всей истории трансмиссивые заболевания неизменно создавали серьезные проблемы для здоровья человека. В рамках стратегий борьбы с переносчиками химических инсектицидов с момента их создания широко применяются. Тем не менее их эффективность постоянно подрывается устойчивым ростом резистентности к инсектицидам среди этих переносчиков. Спрос на более надежные, эффективные и рентабельные природные инсектициды как таковые становится все более насущным. Одним из многообещающих направлений исследований является шитин, который является важнейшим структурным компонентом экзоскелетов комаро

Совпадение в аннотации оригинала
Throughout history, vector-borne diseases have consistently posed significant challenges to human health. Among the strategies for vector co … t also lends flexibility to the insect body. It undergoes substantial transformations during insect molting, a process known as ecdysis. Crucially, the production of chitin is facilitated by an enzyme known as chitin synthase, making it an attractive target for potential novel insecticides. Our recent study delved into the impacts of curcumin, a natural d …

Molecular identification of a PGRMC-2 receptor in maturing oocytes of the zoonotic nematode parasite Trichinella spiralis.

We previously reported that the Trichinella nematode showed higher parasite loads in one gender than another, but also the parasite molting rate decreased when it was cultivated in the presence of progesterone. In this study we explored the hypothesis that the direct effect of progesterone on Trichinella spiralis could be mediated by a steroid-binding parasite protein. We sequenced, cloned and amplified the Cyt-domain of the progesterone receptor membrane component-2 of Trichinella spiralis (PGRMC2-Ts). Furthermore, we expressed the protein and developed an antibody to perform confocal microsc…

Drugs that target early stages of Onchocerca volvulus: A revisited means to facilitate the elimination goals for onchocerciasis.

Several issues have been identified with the current programs for the elimination of onchocerciasis that target only transmission by using m … of onchocerciasis is not a new concept. We present new data showing that these drugs can inhibit L3 molting and/or inhibit motility of L4 at IC50 and IC90 that are covered by the concentration of these drugs in plasma based on the corresponding pharmacological profiles obtained in human clinical trials when these drugs were tested using various doses for …

The prevalence of Coxiella burnetii in ticks and animals in Slovenia.

BACKGROUND: The obligate intracellular bacterium Coxiella burnetii causes globally distributed zoonotic Q fever. Ruminant livestock are comm … rom animals were most likely found to harbor C. burnetii DNA, and the infection was not lost during molting. The persistence and distribution of pathogens in cattle and sheep indicates that C. burnetii is constantly present in Slovenia.

Oral vaccination with Trichinella spiralis DNase II DNA vaccine delivered by attenuated Salmonella induces a protective immunity in BALB/c mice.

Trichinellosis is one of the most serious foodborne parasitic zoonosis with worldwide distribution, and it is necessary to develop a vaccine … scent test revealed that native TsDNase II is present at the cuticle of this nematode after the 2nd molting, further confirming that TsDNase II is adult-specific and expressed at AW and pre-adult stages. Oral immunization of mice with TsDNase II exhibited a 53.85% reduction in AW and a 59.26% reduction in ML after larval challenge. The in vitro NBL produc …

Immobility in the sedentary plant-parasitic nematode H. glycines is associated with remodeling of neuromuscular tissue.

The sedentary plant-parasitic nematodes are considered among the most economically damaging pathogens of plants. Following infection and the … icle during immobile developmental stages. Male H. glycines undergo somatic muscle renewal prior to molting into a mobile adult. In addition, we found developmental changes to the organization and number of motor neurons in the ventral nerve cord correlated with changes in mobility. To further examine neuronal changes associated with immobility, we used a …

CHHBP: a newly identified receptor of crustacean hyperglycemic hormone.

Crustacean hyperglycemic hormone (CHH) is a neurohormone found only in arthropods that plays a pivotal role in the regulation of hemolymph glucose levels, molting and stress responses. Although it was determined that a membrane guanylyl cyclase (GC) acts as the CHH receptor in the Y-organ during ecdysteroidogenesis, the identity of the CHH receptor in the hepatopancreas has not been established. In this study, we identified CHH binding protein (CHHBP), as a potential receptor by screening the annotated unigenes from the transcriptome of ITALIC! Eriocheir sinensis, after removal of the eyestalk…

Effects of homologous and heterologous immunization on the reservoir competence of domestic dogs for Rickettsia conorii (israelensis).

A number of spotted fever group (SFG) rickettsiae cause serious infections in humans. Several antigenically related rickettsial agents may c … days 1, 7, and 14 post-challenge. These ticks were tested for the presence of rickettsial DNA after molting to the nymphal stage. The naive dogs became infected with R. conorii israelensis and were infectious to ticks for at least 3 weeks, whereas reservoir competence of dogs previously infected with either R. massiliae or R. conorii was significantly dim …

The chemokine CXCL12 is essential for the clearance of the filaria Litomosoides sigmodontis in resistant mice.

Litomosoides sigmodontis is a cause of filarial infection in rodents. Once infective larvae overcome the skin barrier, they enter the lympha … n both strains of mice delayed filarial development, as evidenced by the postponement of the fourth molting process. Furthermore, the in vitro growth of stage 4 filariae was favored by the addition of low amounts of CXCL12. The CXCL12/CXCR4 axis thus appears to have a dual effect on the L. sigmodontis life cycle: by acting as a host-cell restriction facto …

Resistance and susceptibility to filarial infection with Litomosoides sigmodontis are associated with early differences in parasite development and in localized immune reactions.

In order to understand natural resistance to filariasis, we compared Litomosoides sigmodontis primary infection of C57BL/6 mice, which elimi … lity. The majority of worms reached the adult stage in both mouse strains; however, worm growth and molting were retarded in resistant C57BL/6 mice. Surprisingly, the only immune responses detected at 60 h postinfection occurred in the susceptible mice and only upon stimulation of cells from lymph nodes draining the inoculation site with infective larva e …

Immunity to onchocerciasis: cells from putatively immune individuals produce enhanced levels of interleukin-5, gamma interferon, and granulocyte-macrophage colony-stimulating factor in response to Onchocerca volvulus larval and male worm antigens.

Antigen-specific interleukin-5 (IL-5), gamma interferon (IFN-gamma), and granulocyte-macrophage colony-stimulating factor (GM-CSF) responses in individuals living in an area of hyperendemicity for onchocerciasis in Cameroon were examined. The responses against antigens prepared from Onchocerca volvulus third-stage larvae (L3), molting L3 (mL3), and crude extract from adult males (M-OvAg) were compared to the responses against antigens from adult female worms and skin microfilariae. Cytokine responses for the putatively immune individuals (PI) and the infected individuals (INF) were compared. A…

Effect of piperazine (diethylenediamine) on the moulting, proteome expression and pyrophosphatase activity of Ascaris suum lung-stage larvae.

Piperazine (diethylenediamine) is an anthelmintic widely used against animal and bird ascariasis. In this study, we show that treatment with piperazine blocks Ascaris suum larval moulting and development processes and affects larval proteome expression profiles. A. suum lung-stage L3 (LL3) obtained from an infected rabbit's lungs were cultured in RPMI medium in the presence of increasing concentrations of piperazine sulfate (Pzes). Our results showed that Pzes potently inhibited moulting of A. suum LL3 in a dose-dependent manner and that moulting was completely blocked (100%) at 50mM concentra

Mutations in the Drosophila glycoprotein hormone receptor, rickets, eliminate neuropeptide-induced tanning and selectively block a stereotyped behavioral program.

Adult insects achieve their final form shortly after adult eclosion by the combined effects of specialized behaviors that generate increased blood pressure, which causes cuticular expansion, and hormones, which plasticize and then tan the cuticle. We examined the molecular mechanisms contributing to these processes in Drosophila by analyzing mutants for the rickets gene. These flies fail to initiate the behavioral and tanning processes that normally follow ecdysis. Sequencing of rickets mutants and STS mapping of deficiencies confirmed that rickets encodes the glycoprotein hormone receptor DLG

Heat stress induces gonadal transcriptomic reprogramming and histopathological alterations in the mud crab Scylla paramamosain.

Rising seawater temperature poses a severe threat to crustaceans and marine ecosystem stability by perturbing reproductive physiology, where … modulated the expression of key genes involved in sex determination and differentiation, as well as molting, including Fru, MIH1/2, CHT1/2/3, ECD, RXR2 and EcR1/2. Sex-specific reproductive impairments were further characterized in response to HS. In females, HS modulated the expression of genes associated with ovarian development, including those in the …

Physicochemical characterization of necrophagous insect exuviae and their potential for forensic application.

Insect exuviae are physical records of insect molting events, which can provide valuable clues regarding insect developmental timing and physiological status. They are frequently encountered and sometimes the sole insect evidence at a crime scene. However, fragmentation poses a significant limitation to their practical application, potentially shifting the advantage towards physicochemical characterization methods over traditional morphological analysis. This study presents a systematic characterization of exuviae from seven major necrophagous insect taxa using Scanning Electron Microscopy-Ene…

Functional Characterization of Trypsin Genes in Spodoptera litura and Their RNA Silencing in Combination with Insecticides.

Trypsin is one of the major digestive proteinases secreted by the insect midgut. It plays important roles in digestion, molting, diapause, zymogen activation, innate immunity, reproduction and insecticide resistance. However, the functions of trypsin and its potential as a target for the control of Spodoptera litura, a polyphagous agricultural pest, remain poorly understood. In this study, seven trypsin genes related to S. litura development were characterized. Temporal-spatial expression results showed that the seven trypsin genes were predominantly expressed during the larval stage and mainl…

Genome-wide identification and expression analysis of carbohydrate catabolism pathway genes in crustaceans with special reference to Chinese mitten crab Eriocheir sinensis.

Carbohydrate catabolism is essential for energy production and environmental adaptation in crustaceans. However, it largely remains unclear … ealed clade-specific high expression patterns across tissues and in the hepatopancreas at different molting stages, suggesting potential functional divergence. Transcription factor binding site analysis of representative species with contrasting dietary tendencies demonstrated enrichment of carbohydrate-related transcription factors, including ChREBP, in …

Functional spatial organization of antennal hair plate sensilla and their development in crickets.

Antennae of insects are essential mechanosensory organs that facilitate active tactile exploration and spatial navigation. Hair plate sensil … nt throughout development. Three-dimensional quantification revealed that new sensilla added during molting were formed at specific sites within the hair plate clusters that had existed at the previous stage, maintaining the spatial pattern despite the substantial growth of the antenna. Multidimensional analyses indicated that the spatial arrangement of s …

CAT-Posterior Mean Site Frequencies Improves Phylogenetic Modeling Under Maximum Likelihood and Resolves Tardigrada as the Sister of Arthropoda Plus Onychophora.

Tardigrada, the water bears, are microscopic animals with walking appendages that are members of Ecdysozoa, the clade of molting animals that also includes Nematoda (round worms), Nematomorpha (horsehair worms), Priapulida (penis worms), Kinorhyncha (mud dragons), Loricifera (loricated animals), Arthropoda (insects, spiders, centipedes, crustaceans, and their allies), and Onychophora (velvet worms). The phylogenetic relationships within Ecdysozoa are still unclear, with analyses of molecular and morphological data yielding incongruent results. Accounting for across-site compositional heterogen…

Spatiotemporal Expression and Functional Analysis of PtWnt7b During Limb Regeneration in Portunus trituberculatus.

The biological phenomenon of regeneration is observed in many crustaceans, particularly in commonly encountered species, such as shrimp and … iency, characterized by delayed growth of regenerating limb buds, malformed regenerated limbs after molting, and reduced recovery rates. Additionally, using a luciferase reporter assay, we confirmed that PtWnt7b expression activates the Wnt/β-catenin signaling pathway. These findings indicated that PtWnt7b plays a critical role in promoting cell prolifera …