Analysis of key enzymes and mechanisms involving aflatoxin B1 (AFB1) degradation in Tenebrio molitor using iTRAQ technology.

Rapaglutin A (RgA) is a potent pan-class I glucose transporter (GLUT) inhibitor identified from the rapafucin library. However, its development is hindered by plasma instability due to the rapid hydrolysis of lactone moieties by carboxylesterases, especially in rodents. To improve its stability, we designed and synthesized RgA analogues in which the lactones were substituted with more stable lactams. We found that substitution of either lactone-enhanced plasma stability, while dual lactam replacement produced the greatest improvement in mouse plasma, which has a high esterase activity. Importantly, the lactam analogues retained most of the inhibitory activity of the parent RgA against GLUT in DLD1 cells. This approach offers a promising strategy to enhance the plasma stability of RgA without significantly compromising its activity, with potential applicability across the rapafucin class of macrocycles.

Diverse metal‐organic frameworks (MOFs) have been actively studied for enzyme encapsulation to enhance encapsulation efficiency (EE), retained enzymatic activity (REA), and stability. This study develops a biocompatible synthesis protocol for a MOF constructed from Ca2⁺ and 4,5‐imidazoledicarboxylate ligand (termed CaIDC) in water at room temperature. This method enabled in situ, one‐pot encapsulation of various enzymes, including bovine serum albumin (BSA), glucose oxidase (GOx), catalase (CAT), and esterase (EST). Compared to widely studied zeolitic imidazolate frameworks (ZIFs), CaIDC‐based biocomposites demonstrated enhanced chemical robustness in phosphate buffer at pH 6.0 and 7.4. To optimize the synthesis process, a machine learning‐assisted workflow incorporating Latin hypercube sampling (LHS) is developed for an efficient exploration of the entire synthesis space. As a model system, the optimized EST@CaIDC sample (EC19) exhibited EE, REA, and protein loading (Ploading) values of 28.7%, 20.1%, and 4.2 wt.%, respectively. In all, this study presents the development of a robust CaIDC‐based platform for enzyme encapsulation and the implementation of an efficient ML‐assisted optimization strategy, offering a pathway to advance enzyme encapsulation technologies with enhanced catalytic performance and sustainability.

Remimazolam is a novel, ultra-short-acting benzodiazepine that has emerged as a promising agent in modern anesthetic and intensive care practice. This review pre-sents a detailed analysis of its pharmacokinetic and pharmacodynamic properties, clinical efficacy, and safety profile across various patient populations and procedural contexts. The drug's rapid metabolism by plasma esterases, minimal reliance on hepatic or renal function, and availability of a reversal agent (flumazenil) distinguish it from traditional sedatives such as propofol and midazolam. Clinical data support its utility in procedural sedation, general anesthesia, and ICU sedation, particularly in elderly and hemodynamically unstable patients. Pediatric applications are discussed, highlighting the early evidence and dosing considerations. The review also compares remimazolam with other agents such as propofol and dexmedetomidine, underlining its advantages in cardiovascular stability and recovery profiles. While current results are encouraging, the article emphasizes the need for further research to establish standardized protocols and explore its long-term safety, especially in vulnerable populations.

This study investigated the effects of Beauveria bassiana infection on detoxification enzymes in Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) across different host plants. Mortality rates varied significantly, showing a concentration-dependent response. The highest mortality of eggs and nymphs occurred on C. sativus at 2.5×10⁷ spores/mL, while the lowest was recorded on C. annum at the same concentration. A similar trend was observed at the lowest tested concentration (1×10⁶ spores/mL), with C. sativus exhibiting the highest mortality and C. annum the lowest. Enzyme assays revealed that glutathione S-transferase (GST) and esterase (EST) activities increased in infected B. tabaci compared to controls on C. sativus. In contrast, acetylcholinesterase (AChE), acid phosphatase (ACP), and alkaline phosphatase (ALP) activities showed a gradual rise post-infection on C. sativus as compared to other tested hosts. These findings highlight host plant-mediated variations in B. bassiana efficacy and associated enzymatic responses in B. tabaci, providing insights into fungal biocontrol mechanisms.

Spodoptera frugiperda is a notorious pest that has been recorded attacking over 353 crop species worldwide. Excessive insecticide exposure can lead to resistance and has adverse impacts on the environment and beneficial organisms. Long-lasting pest control methods like entomopathogenic fungi may be used to prevent the negative impact of synthetic insecticides. In the current research, effectiveness of Cordyceps fumosorosea was analysed by applying a sub-lethal dose (LC15=2.09×106 spores mL-1) and a lethal dose (LC50=2.17×107 spores mL-1) on filial (F0) and first filial (F1) generations of S. frugiperda to estimate both lethal and sub-lethal effects. The LC15 was used to keep a significant proportion of larvae alive to permit determination of sublethal effects on S. frugiperda. After treatment with the LC15 and LC50, S. frugiperda progeny displayed shorter larval duration, lower fecundity, and shorter adult female and male longevities relative to untreated controls. Likewise, the adult pre-oviposition period, total pre-oviposition period, oviposition days (Od), net reproductive rates (Ro), and mean generation times (T) were reduced in fungal-infected groups. Furthermore, activities of key detoxifying enzymes, i.e.acetylcholinesterase (AChE), glutathione S-transferases (GST), and esterases (EST), were also evaluated. Substantial differences of AChE, GST, and EST (24.3, 18.34, and 10.09µmol/min/mg protein), respectively, were observed at the LC50 in contrast to the LC15 and controls. The current study showed pathogenicity of C. fumosorosea, which negatively affected insect development and changed the activities of detoxifying enzymes, thereby increasing the effectiveness and eco-friendly management of S. frugiperda.

Synthesis of 20α/β-hydroxyprogesterone-trimethyl lock-triglyceride-mimetic prodrugs and its bioavailability study in rats.

Abstract Background: Red palm weevil, Rhynchophorus ferrugineus Olivier is a serious pest of date palm groves in Pakistan, which is the sixth-largest date palm producer around the globe. Currently, this pest is managed with synthetic insecticides, which negatively impact human health, the environment and resistance issues. To mitigate these problems, biocontrol agents such as entomopathogenic fungi, which are ecologically safe and environmentally friendly alternatives, need to be integrated. Methods: In the current study, the lethal effect of Metarhizium anisopliae, Imunit (alpha-cypermethrin + teflubenzuron) and chlorpyrifos were determined on the demographic parameters of the R. ferrugineus using age stage two sex life table software. Lethal concentration (LC 50 ) of chlorpyrifos, Imunit and Metarhizium anisopliae i.e. 8.060mg/L, 1.114 mg/L and 2.9×10 4 conidia/mL, respectively were determined on 2nd instar grub. Results: The current study showed that Imunit-treated group experienced a decrease in grubs, adult male and female duration, and significantly a decreased fecundity rate compared to the chlorpyrifos, M. anisopliae and control - treated groups. Also, adult pre-oviposition period (APOP), total pre-oviposition period (TPOP) and oviposition days (O d ) were decreased in the Imunit-treated group compared to the other pesticides-tested group. Imunit-treated group showed reduced mean generation time ( T ) and net reproduction rate ( R 0 ) compared to all tested pesticides. Moreover, the effect of M. anisopliae, Imunit and chlorpyrifos on the detoxification enzymes such as glutathione S-transferases (GST), esterases (EST) and acetylcholinesterase (AChE) on 3rd, 5th and 7th day showed highest activity of these enzymes on the 3rd day of treatment in chlorpyrifos-treated group and in Imunit-treated group. The lowest activity of these enzymes was observed in M. anisopliae and control-treated group, which showed the chances of resistance against M. anisopliae is less than chlorpyrifos- and Imunit-treated group. Conclsuion: The Imunit insecticide and M. anisopliae have adverse and long lasting effects on the R. ferrugineus population. In the future, M. anisopliae should be incorporated with Imunit pesticides to manage R. ferrugineus eco-friendly.

The intensification of human activities in recent years has led to significant overexploitation of Triplophysa strauchii populations, resulting in a decline in the species’ natural stocks. This underscores the need for research and development initiatives aimed at supporting the recovery and sustainable management of the species. Therefore, this study investigated its biological traits and isozyme characteristics in detail. First, throutigations of fish ecology, the age and growth patterns of T. strauchii were examined. The results revealed that the length of the otoliths was greater than the width and that the intermajor groove was indistinct. The age range of the fish was 0–4 years. A correlation between body length and weight revealed that T. strauchii exhibited isometric growth patterns. In terms of growth parameters, the inflection point in age for T. strauchii was ti = 3.23. Additionally, to analyze the enzymes lactate dehydrogenase (LDH), malate dehydrogenase (MDH), and esterase (EST) in ten tissues of T. strauchii (liver, muscle, heart, gills, eye, brain, fins, kidneys, gonads, and intestines), vertical plate electrophoresis was performed via polyacrylamide gels. The results of isoenzyme analysis revealed that the LDHA (lactate dehydrogenase A subunit) gene was predominant in all tissues. A maximum of two s-MDH enzyme bands with three m-MDH enzyme bands were detected, with a classic enzyme profile and no gene mutation. The EST enzyme was highly expressed in the liver and kidney and was less polymorphic. In general, T. strauchii exhibited a spindle-like body shape and isometric growth patterns in the Turks River. It exhibited a narrow age range, strong adaptability, and stable genetic traits. This species has high development potential, utilization value and ecological significance.

In the current study, the toxicity and physiological effects of pyridalyl and tebufenozide were determined on 4th instar larvae of H. cunea. Both compounds were orally toxic to the larvae, although pyridalyl was more toxic to H. cunea larvae than tebufenozide, with a lower median lethal dose. General esterase (EST) activity increased in tebufenozide and pyridalyl treated larvae after 24 h, while glutathione S-transferase (GST) activity increased after 72 h. Alanine aminotransferase (ALT) activity decreased in pyridalyl-treated larvae at 24 h, while it highly elevated at 72 h. Larvae treated with both compounds showed lower aspartate aminotransferase (AST) activity compared to the control with the lowest activity of tebufenozide at 24 h, while the enzyme activity showed no statistical differences between control and tebufenozide with the highest activity after pyridalyl treatment at 72 h. Tebufenozide treated larvae showed the lowest catalase activity compared to control at 24 h, while the enzyme activity increased in treated larvae at 72 h. Peroxidase activity increased significantly in treated larvae compared to control at both time intervals, except for tebufenozide at 72 h. Pyridalyl and tebufenozide treated larvae showed significant increase in superoxide dismutase activity at both time intervals.

The toxicity of synthetic pesticides to non-target organisms has prompted a shift towards more environmentally friendly agricultural pest control methods, including the use of essential oils as possible biopesticides. Before these natural chemicals can be widely adopted for protecting food supplies and human health, it is crucial to evaluate their impacts on pollinators, such as honey bees. In this study, we examined the effects of one commercially available essential oil mixture (EcoTec+) and four essential oil components (β-bisabolene, cinnamaldehyde, 1,8-cineole, and eugenol) on honey bee workers using feeding or spray treatment. We then assessed the responses of esterase (EST), glutathione-S-transferase (GST), acetylcholine esterase (AChE), and P450. EcoTec+ increased the P450 transcript, while bisabolene inhibited EST and AChE, increased GST, and caused a mixed P450 response without being lethal. Cinnamaldehyde exhibited toxicity when ingested, suppressing P450 and eliciting a mixed response in AChE. Cineole inhibited EST but caused a mixed P450 response. Eugenol suppressed EST and AChE and was toxic on contact. We also assayed combinations of each compound with four synthetic formulations representative of the major pesticide categories, though no significant interactions were found. Overall, the essential oils tested did not cause acute lethal toxicity to honey bees; however, their biochemical effects varied, mostly remaining sublethal. These findings suggest that these essential oils could be considered safe for use around honey bees.

Remifentanil is an opioid anesthetic that has today become one of the most popular drugs used in modern anesthetic practice. For this reason, its distinct pharmacokinetic and pharmacodynamic profile renders it a useful agent for intraoperative pain management and co-induction of anesthesia. Ramifentanil possesses rapid onset and offset, short duration of action, and experiences minimum tissue accumulation. The above properties are attributed to high lipophilicity, fast distribution, and metabolism by plasma esterase enzymes. Remifentanil is an active metabolite of heterocyclic ethyl carbamate, having actions that reflect potent opioid agonist effects manifested by analgesia, sedation, and respiratory depression. It involves a low propensity to cause histamine release and relatively few cardiovascular side effects; hence, it is recommended for use by those with allergic reactions or cardiovascular disorders. Remifentanil is an ultra-short-acting, highly potent anesthetic mostly used as an opioid anesthetic agent possessing distinguishable characteristics in pharmacokinetics and pharmacodynamics. Nonetheless, it exerts significant toxicology with specific reference to respiratory depression, thus requiring thorough management. When ramifentanil pharmacokinetics and pharmacodynamics are well known, one can eliminate unfavorable consequences and use the drug most efficiently. Remifentanil is very short-acting due to its rapid metabolism by esterase in the blood. This rate of metabolism makes them capable of rapid induction and recovery, which makes them suitable for use in procedures that require a fast start and finish.

Salinity induced changes in esterase, peroxidase and alcohol dehydrogenase isozymes and leaf soluble proteins in salinity susceptible and salinity tolerant sugarcane genotypes.

Impacts of an organophosphate pesticide and water restriction on physiology and immunity in the passerine Zonotrichia capensis.

Objectives: The development of novel long-acting injectables for local anesthetics is necessary to effectively manage the acute postoperative pain. The aim of this study was to prepare an injectable oil-based formulation of ropivacaine (ROP) prodrug (ropivacaine stearoxil, ROP-ST) and to investigate the pharmacokinetics and pharmacodynamics after injectable administration. Methods: A novel N-acyloxymethyl prodrug of ROP, i.e., ROP-ST, was synthesized and its physicochemical properties such as log P, solubility and stability characterized. A soybean oil-based depot of ROP-ST was prepared, and the in-vitro release of ROP-ST was evaluated using an "inverted-cup" method. Pharmacokinetic profiles and tissue retention properties were investigated after intramuscular administration of the formulation in rats. The analgesic efficacy was assessed via a von Frey monofilaments test by measuring the paw withdrawal thresholds. Results: The structure of ROP-ST was ascertained with clear 1H NMR assignment and accurate mass-to-charge ratio. The high Log P value of ROP-ST (9.16) demonstrated extremely low aqueous solubility, but the prodrug is biolabile when in contact with plasma or liver esterase. Intramuscular injection of ROP-ST oil solution in rats provided a significantly higher mean residence time without a very clear plasma peak of ROP. In a postoperative pain model of rats, the injection of ROP-ST oil solution into the vicinity of the sciatic nerve in the right ankle effectively controlled the postoperative pain for at least 72 h. Conclusions: The injectable oil-based depot formulation of N-acyloxymethyl prodrug of ROP may provide a new opportunity of long-acting local analgesia for postoperative pain.

Self-induced anaerobiosis fermentation in coffees inoculated with yeast: Effect on key enzymes of the germination process and its relationship with the decrease in seed germination

Invasion of microorganisms into the gut of insects triggers a cascade of immune reactions accompanied by increased synthesis of effectors (such as antimicrobial peptides, cytokines, and amino acids), leading to changes in the physiological state of the host. We hypothesized that even an inactivated bacterium can induce an immune response in an insect. The aim of this study was to compare the roles of reactive oxygen species (ROS) formation and of the response of detoxification and antioxidant systems in a Colorado potato beetle (CPB) larval model in the first hours after invasion by either an inactivated or live bacterium. The influence of per os inoculation with inactivated entomopathogenic bacterium Bacillus thuringiensis var. tenebrionis (Bt) on the survival and physiological and biochemical parameters of CPB larvae was assessed as changes in the total hemocyte count (THC), activity of phenoloxidases (POs), glutathione-S-transferases (GSTs), nonspecific esterases (ESTs), catalase, peroxidases, superoxide dismutases (SODs) and formation of reactive oxygen species (ROS). A series of changes occurred within the hemolymph and the midgut of CPBs inoculated with inactivated Bt at 12 h after inoculation. These physiological and biochemical alterations serve to mediate generalized resistance to pathogens. The changes were associated with an increase in the THC and a 1.4-2.2-fold enhancement of detoxification enzymatic activities (such as GST and EST) as well as increased levels of antioxidants (especially peroxidases) in hemolymph in comparison to the control group. Suppressed EST activity and reduced ROS formation were simultaneously detectable in the larval midgut. Inoculation of beetle larvae with active Bt cells yielded similar results (elevated THC and suppressed PO activity). A fundamental difference in the immune activation processes between larvae that ingested the inactivated bacterium and larvae that had consumed the active bacterium was that the inactivated bacterium did not influence ROS formation in the hemolymph but did reduce their formation in the midgut. At 24 h postinfection with active Bt, ROS levels went up in both the hemolymph and the midgut. This was accompanied by a significant 5.7-fold enhancement of SOD activity and a 5.3-fold suppression of peroxidase activity. The observed alterations may be due to within-gut toxicity caused by early-stage bacteriosis. The imbalance in the antioxidant system and the accumulation of products toxic to the "putative" pathogen can activate detoxification mechanisms, including those of an enzymatic nature (EST and GST). The activation of detoxification processes and of innate immune responses is probably due to the recognition of the "putative" pathogen by gut epithelial cells and is similar in many respects to the immune response at early stages of bacteriosis.

Neem, a biopesticide, offers a safer alternative to the synthetic insecticides commonly used in mulberry cultivation, which can harm silkworms. This study aimed to investigate the effects of Thai neem seed extract on all instar larvae of the Thai polyvoltine hybrid silkworm, Bombyx mori L., Dok Bua strains, focusing on the mortality rate and the activities of esterase (EST) and glutathione S-transferases (GST) enzymes. Acute toxicity was assessed using the leaf-dipping method. Results showed that the mortality rate tended to be higher in younger instars than in older ones. The first instar larvae exhibited the highest mortality rate at 94%, whereas the LC50 was highest in the third instar at 5.23 mg L-1 at 72 h. This trend aligns with the activities of EST and GST, which were evaluated in the whole bodies of the first instar larvae and the midgut tissue of fifth instar larvae. As the extract concentration increased, EST activity decreased while GST activity increased in both the first and fifth instar larvae. These findings highlight that neem extract is toxic to all instar larvae, with GST playing a crucial role in detoxification, particularly in the whole body of the Thai polyvoltine hybrid silkworm.

Remifentanil hydrochloride is an ultra-short-acting opioid that undergoes rapid metabolism by tissue and plasma esterases. Remifentanil is increasingly used as an adjuvant to general anaesthesia in neonates undergoing surgery because of its favourable haemodynamic and respiratory effects compared with other agents. The pharmacokinetic profile of remifentanil appears well suited for use in the sedation of children for short, day case procedures and remifentanil has been demonstrated to be an attractive drug for this purpose. Owing to higher clearances, younger children will require higher infusion rates of remifentanil than older children and adults to achieve equivalent plasma concentrations. Propofol and remifentanil appear to be gaining popularity for short procedures in children. Together they provide sedation, anxiolysis and analgesia, possibly best provided by separate continuous infusions. They also promote haemodynamic stability, minimal respiratory depression, with a rapid recovery profile. The use of remifentanil in neonates and young infants is increasing despite the difficulties in obtaining high standard objective evidence in this age group. Remifentanil’s pharmacokinetic and pharmacodynamic profile in this age group is similar to that of older children, which may have several theoretical advantages. Reports of a rapid development of µ-receptor tolerance with remifentanil are in conflict; activity at δ-opioid receptors may contribute. Remifentanil produce a fall in blood pressure and cardiac index, mainly as a result of a fall in heart rate. Although atropine is able to reduce the fall in heart rate, is not able to prevent completely the reduction in cardiac index. Remifentanil has been described as a titratable opioid. It has been reported to be ideally suited to the sedation of selected neurosurgical patients who require frequent neurological examinations. It may also provide suitable analgesia based sedation in mechanically ventilated children postoperatively.

Psocodean species are emerging as significant sanitary and stored-product pests, posing threats to human health and global food security. Out of an estimated 10000 species, the whole genome sequences of only 4 species have been published. Genomic resources are crucial for establishing effective pest control and enhancing our understanding of the evolution of psocodean species. In this study, we employed Illumina and PacBio sequencing along with Hi-C scaffolding techniques to generate a chromosome-level genome assembly for the parthenogenetic booklouse Liposcelis bostrychophila. The assembled genome of this booklouse measures 291.67Mb in length and comprises 9 chromosomes. Notably, the genome of L.bostrychophila exhibits a high level of heterozygosity and features a distinctive nonhomologous chromosome. This heterozygous characteristic of the parthenogenetic booklouse genome may arise from high mutation rates, based on genomic variations analysis across multiple generations. Our analysis revealed significantly expanded gene families, primarily associated with the detoxification and feeding habits of L.bostrychophila. These include integument esterases (ESTs), ATP-binding cassette (ABC) transporter genes and gustatory receptors (GRs). The high-quality genome sequence of L.bostrychophila provides valuable resources for further study on the molecular mechanisms of stress resistance. It enables researchers to identify crucial functional genes and facilitates research on the population genetics, evolution and phylogeny of booklice.