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14 pages, 1378 KB  
Article
Characterization of Acheta domesticus Protein Powder as an Alternative Protein Source for Cocoa Cream Enrichment
by Milica Stožinić, Jovana Petrović, Branislav Šojić, Biljana Pajin, Attila Gere, Đurđica Ačkar, Ivana Nikolić and Ivana Lončarević
Processes 2026, 14(11), 1729; https://doi.org/10.3390/pr14111729 - 26 May 2026
Abstract
Over the past decade, changes in consumer dietary habits have driven an increasing demand for protein-enriched confectionery products. Consequently, research has increasingly focused on the utilization of alternative protein origins, including Acheta domesticus. This research paper aims to characterize Acheta domesticus protein [...] Read more.
Over the past decade, changes in consumer dietary habits have driven an increasing demand for protein-enriched confectionery products. Consequently, research has increasingly focused on the utilization of alternative protein origins, including Acheta domesticus. This research paper aims to characterize Acheta domesticus protein powder (CP) in terms of its functional properties and chemical composition. In addition, the amino acid profile was determined using HPLC, while antioxidant capacity was evaluated by spectrophotometric methods (including the ABTS assay). Edibility was further assessed in proteins, both in their native form and after incorporation into cocoa cream products, using an in vitro digestion model. The results indicated that methionine was the most abundant essential amino acid in CP (17.71 mg/100 g protein), while glycine was the predominant non-essential amino acid (42.38 mg/100 g protein). CP also demonstrated high solubility (80.00%) and notable water- and oil-binding capacities (90.26% and 94.87%, respectively). However, its emulsifying properties were limited, as emulsifying stability was maintained for only 26 min. In contrast, digestibility results indicated strong protein hydrolysis in both native and cocoa cream samples enriched with CP in different concentrations (10, 12.5 and 15%), hereafter designated as CPC10, CPC12.5, and CPC15. The degree of hydrolysis was higher after the digestion process, with 39.11% for the control and 47.14%, 48.62% and 50.05% for the fortified samples—CPC10, CPC12.5 and CPC15, respectively. The ABTS assay further confirmed the increase in antioxidant activity after digestion. The ABTS values of the digested fortified samples ranged from 20.91% for CPC10 to 40.45% for CPC15, suggesting the release of bioactive peptides during gastrointestinal digestion. Overall, the findings highlight CP as a promising protein source for the fortification of cocoa cream products, which are naturally low in protein content. Full article
(This article belongs to the Section Food Process Engineering)
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23 pages, 3719 KB  
Article
Biosynthesis of Copper and Silver Nanoparticles Using Schinus terebinthifolius Leaf Extract for Antifungal Activity Against Fusarium circinatum and Pythium tardicrescens
by Mohammed A. A. Elshaer, Mervat El-Hefny, Shimaa E.-S. I. Hassanien, Gamal S. Alfawal, Waled Abd-Elhamed, Mohamed A. M. Abd-Elraheem, Abeer A. Mohamed, Ayman S. Taha and Tartil M. Emam
Chemistry 2026, 8(6), 70; https://doi.org/10.3390/chemistry8060070 - 26 May 2026
Abstract
Several bioactive compounds, including phenolic and flavonoid substances, have been identified in the aqueous leaf extract of Schinus terebinthifolius (ALE). These compounds are active ingredients in green nanoparticle biosynthesis. Transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), zeta potential analysis, and FTIR [...] Read more.
Several bioactive compounds, including phenolic and flavonoid substances, have been identified in the aqueous leaf extract of Schinus terebinthifolius (ALE). These compounds are active ingredients in green nanoparticle biosynthesis. Transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), zeta potential analysis, and FTIR spectral analysis were used to characterize copper oxide nanoparticles (CuNPs) and silver nanoparticles (AgNPs). According to TEM results, AgNPs exhibited somewhat larger diameters (12 ± 4 nm), were spherical with significant aggregation, and displayed a fairly uniform distribution, while CuNPs were primarily quasi-spherical with a narrow size range of about 4–5 nm. CuNPs showed a much more negative zeta potential value of −25.8 mV, indicating good to high colloidal stability, whereas AgNPs had a zeta potential of −15.5 mV, suggesting moderate stability. The main compounds included chlorogenic acid (10,375.28 µg/g), gallic acid (7015.59 µg/g extract), ellagic acid (1571.29 µg/g extract), and rutin (1485 µg/g extract). The antifungal activity of CuNPs and AgNPs was tested at concentrations of 6, 12, 25, 50, and 75 μg/mL on Quercus rubra wood against Fusarium circinatum and Pythium tardicrescens. The greatest inhibition of F. circinatum growth was observed with CuNPs and AgNPs at 75 µg/mL, showing fungal inhibition percentages (FIPs) of 61.48 and 60.74%, respectively. CuNPs and AgNPs at 75 µg/mL exhibited moderate activity against P. tardicrescens, with FIPs of 21.48% and 15.92%, respectively. The MICs for AgNPs and CuNPs were 1.5 and 85 µg/mL with F. circinatum and P. tardicrescens, respectively. Overall, CuNPs and AgNPs demonstrated potential antifungal activity against F. circinatum but moderate activity against P. tardicrescens compared to the control. This ALE from S. terebinthifolius is rich in flavonoids and phenolic compounds, including gallic acid, chlorogenic acid, rutin, ellagic acid, and p-coumaric acid, as identified by HPLC analysis. These biomolecules act as both capping agents, which stabilize the nanoparticles, and reducing agents. Using S. terebinthifolius ALE’s rich phytochemical profile as a reducing and stabilizing agent provides an environmentally friendly method for the green synthesis of CuNPs and AgNPs. Full article
(This article belongs to the Section Chemistry at the Nanoscale)
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17 pages, 5399 KB  
Article
Beta-Lactam Antibiotic Stability in Chicken Meat
by Ekaterina Usanova, Mikhail Vokuev, Artem Melekhin, Denis Bulkatov, Michael Parfenov, Victor Tishchenko and Anna Sherstneva
Antibiotics 2026, 15(6), 539; https://doi.org/10.3390/antibiotics15060539 - 26 May 2026
Abstract
Background/Objectives: Residues of β-lactam antibiotics in foods of animal origin are important for official residue control and public-health risk assessment. Sample storage conditions may affect the measured concentrations of these analytes, whereas cooking may influence consumer exposure. This study evaluated the stability of [...] Read more.
Background/Objectives: Residues of β-lactam antibiotics in foods of animal origin are important for official residue control and public-health risk assessment. Sample storage conditions may affect the measured concentrations of these analytes, whereas cooking may influence consumer exposure. This study evaluated the stability of six β-lactam antibiotics—amoxicillin, ampicillin, phenoxymethylpenicillin, benzylpenicillin, cefazolin, and cefotaxime—and clavulanic acid, a β-lactamase inhibitor, in chicken meat during storage and thermal processing. Methods: Incurred chicken meat samples were obtained after in vivo administration of the studied compounds. Stability was assessed during storage at +4 °C, −20 °C, and −86 °C for up to 165 days, during repeated freeze–thaw handling, and during heating at 100 °C for up to 30 min. The target compounds were quantified by HPLC–MS/MS after acetonitrile extraction and hexane clean-up. Results: The studied compounds were unstable at +4 °C, with concentrations decreasing below the detection limit within 3–27 days depending on the compound. Storage at −20 °C was insufficient for long-term preservation of most penicillins, whereas −86 °C improved stability. Cefazolin was the most stable compound under the tested storage conditions, while cefotaxime was the least stable. Heating at 100 °C for 30 min caused substantial reduction in parent-compound concentrations, ranging from 63.8 ± 4.0% for cefazolin to complete disappearance below the detection limit for cefotaxime. Conclusions: For reliable official residue analysis, chicken meat samples intended for β-lactam testing should be stored at −86 °C whenever long-term storage is required. Repeated thawing should be avoided. Cooking substantially reduces the concentrations of the parent compounds but cannot be considered a reliable safety measure, because degradation may be incomplete and degradation products were not assessed in this study. Full article
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22 pages, 3285 KB  
Article
Hypnotic Effects of Hypericum perforatum L. and Melissa officinalis L. Through Adenosine and Melatonin Receptors
by Hye Jin Jee, Suk Jin Lee, Jae Ryeong Yoo, Hye-Jin Kim, Hyoung-Su Park, Hye-Jeong See and Yi-Sook Jung
Nutrients 2026, 18(11), 1666; https://doi.org/10.3390/nu18111666 - 22 May 2026
Viewed by 124
Abstract
Background: Sleep disorders, particularly insomnia, represent a major public health concern, while currently available hypnotic drugs are often limited by adverse effects and poor long-term tolerability. Methods: In this study, we investigated the sleep-promoting effects of a mixture of Hypericum perforatum L. and [...] Read more.
Background: Sleep disorders, particularly insomnia, represent a major public health concern, while currently available hypnotic drugs are often limited by adverse effects and poor long-term tolerability. Methods: In this study, we investigated the sleep-promoting effects of a mixture of Hypericum perforatum L. and Melissa officinalis L. extract (HME) and its underlying mechanisms in male ICR and C57BL/6 mice. In a pentobarbital-induced sleep model in mice, sleep onset latency and total sleep time were measured. Pharmacological studies using various antagonists and agonists were conducted to elucidate receptor-mediated mechanisms. Immunohistochemical and immunofluorescence analyses were performed to assess neuronal activity, and cortical mRNA expression was evaluated by quantitative analysis. HPLC analysis was used to identify the major constituents of HME, and their pharmacological profiles were functionally evaluated. Results: HME significantly reduced sleep onset latency and prolonged total sleep time. These hypnotic effects were shown to be mediated through adenosine and melatonin receptor signaling pathways. Immunohistochemical and immunofluorescence analyses showed that HME suppressed neuronal activity in wake-promoting cholinergic and orexinergic neurons of the basal forebrain and lateral hypothalamus, while enhancing activation of sleep-promoting GABAergic neurons in the ventrolateral preoptic nucleus. At the molecular level, HME increased cortical mRNA expression levels of adenosine A1 receptor, adenosine A2A receptor, melatonin receptor 1, and melatonin receptor 2. From the HPLC analysis, rosmarinic acid and hyperoside were identified as the major constituents of HME. Functional evaluation of these compounds revealed complementary pharmacological profiles, with hyperoside primarily acting through adenosine receptors and rosmarinic acid engaging both adenosine and melatonin receptor pathways. Conclusion: These findings suggest that HME enhances both sleep initiation and maintenance through adenosine and melatonin receptor signaling pathways, thereby supporting its potential as a multitarget therapeutic agent for improving sleep quality. Full article
16 pages, 2261 KB  
Article
Development and Optimisation of an HPLC–MS/MS Workflow for Profiling Selenium and Sulphur Amino Acids in Soybean Leaves and Investigation of Se–S Metabolic Interactions
by Xiaohui Cai, Jun Men, Qingwu Yang, Yili Hu and Zhixian Qiao
Molecules 2026, 31(11), 1780; https://doi.org/10.3390/molecules31111780 - 22 May 2026
Viewed by 191
Abstract
A derivatisation-free HPLC–MS/MS method was developed and validated for the simultaneous quantification of selenium- and sulphur-containing amino acids in soybean leaves, and applied to a 3 × 3 factorial hydroponic experiment probing selenium–sulphur metabolic interactions. The method resolves five biologically informative analytes (Cys [...] Read more.
A derivatisation-free HPLC–MS/MS method was developed and validated for the simultaneous quantification of selenium- and sulphur-containing amino acids in soybean leaves, and applied to a 3 × 3 factorial hydroponic experiment probing selenium–sulphur metabolic interactions. The method resolves five biologically informative analytes (Cys2, SeCys2, MeSeCys, Met, SeMet) within 1.5 min through multiple reaction monitoring (MRM). Ultrasound-assisted extraction (UAE) of the free fraction was jointly optimised for both analyte classes by the response-surface methodology; enzymatic hydrolysis of the extraction residue recovered the protein-bound fraction on the same platform. Limits of detection ranged from 0.036 to 0.556 µg L−1, intra-day relative standard deviations were below 5%, and spike recoveries fell between 92.3 and 117.4%. Free SeAA and SAA pools were negatively correlated across the nine treatments (R2 = 0.83), consistent with competitive Se–S assimilation, whereas bound pools were positively correlated (R2 = 0.89), reflecting proportional protein-level incorporation. A regime of 1–5 mM of sulphate with 20 µM of selenite yielded the highest bound organo-Se with near-normal growth, providing leaf-level evidence that may inform future seed-focused studies aimed at Se-enriched soy-protein ingredient development. Full article
(This article belongs to the Special Issue Recent Advances in Extraction Techniques for Elemental Analysis)
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18 pages, 3079 KB  
Article
A Rapid and Low-Organic Consumption Analytical Method for Doxycycline with Application to Dissolution and Permeability Studies
by Georgios Kamaris, Maria Aikaterini Bampalitsa, Paraskevi Kyriaki Monou and Catherine K. Markopoulou
Appl. Sci. 2026, 16(11), 5172; https://doi.org/10.3390/app16115172 - 22 May 2026
Viewed by 115
Abstract
Doxycycline (DOX) is a well-characterized antibiotic, and its pharmacokinetic behavior has recently attracted renewed scientific interest. Its absorption occurs mainly in the small intestine, while ions such as Fe3+ and Al3+ readily form complexes, particularly under acidic conditions, thereby reducing the [...] Read more.
Doxycycline (DOX) is a well-characterized antibiotic, and its pharmacokinetic behavior has recently attracted renewed scientific interest. Its absorption occurs mainly in the small intestine, while ions such as Fe3+ and Al3+ readily form complexes, particularly under acidic conditions, thereby reducing the fraction of free drug available for absorption. The present study provides a systematic investigation of how such interactions influence the dissolution and intestinal permeability of DOX. A dynamic in vitro protocol was implemented, incorporating an online transition from gastric to intestinal conditions in combination with Franz diffusion cells. This integrated system enables real-time monitoring of early DOX absorption-related processes, providing a more comprehensive understanding of potential pharmacokinetic interactions during its coadministration with iron or aluminum supplements. To ensure reliable quantification, a rapid, economical, and environmentally compatible HPLC-FLD method was developed and validated, employing a Hypersil Gold C18 column (50 mm × 4.6 mm, 5 μm; Thermo) and a mobile phase consisting of acetonitrile—20 mM NaH2PO4 (pH 2) 15:85 v/v. Overall, a practical and efficient framework was established for investigating factors that influence the bioavailability of doxycycline, supporting the broader evaluation of drug, excipient, and drug supplement interactions. Full article
(This article belongs to the Special Issue Research on Organic and Medicinal Chemistry, Second Edition)
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14 pages, 641 KB  
Article
Phenolic Acid Distribution in Wheat Pearling Fractions Using Microwave-Assisted Extraction
by Kemashalini Kirusnaruban, Nicola Gasparre, Ruchira Nandasiri, Michael N. A. Eskin and Cristina M. Rosell
Foods 2026, 15(10), 1828; https://doi.org/10.3390/foods15101828 - 21 May 2026
Viewed by 181
Abstract
Phenolic acids are bioactive compounds in wheat (Triticum aestivum L.) that contribute to its nutritional and functional properties, yet their distribution within the kernel is uneven. This study investigated the effect of progressive pearling on phenolic acid distribution using microwave-assisted extraction (MAE) [...] Read more.
Phenolic acids are bioactive compounds in wheat (Triticum aestivum L.) that contribute to its nutritional and functional properties, yet their distribution within the kernel is uneven. This study investigated the effect of progressive pearling on phenolic acid distribution using microwave-assisted extraction (MAE) with water as a solvent. Three commercial Canada Western Red Spring wheat samples were pearled into six fractions (50–450 s), corresponding to 5–45% removal of outer kernel layers. Pearled kernels, pearled kernel flours, and pearled fractions were analyzed for total phenolic content (TPC) and individual phenolic acids using HPLC-DAD. The 10% pearled fraction (PF100) exhibited the highest TPC (9286 ± 168 µg GAE/g), confirming phenolic enrichment in the outer bran and sub-aleurone layers. Outer kernel tissues contained the highest gallic acid (1954 µg/g), whereas the endosperm retained lower levels of gallic (450 µg/g), hydroxycinnamic (122 µg/g), sinapic (87 µg/g), and ferulic (84 µg/g) acids. Both TPC and individual phenolic acids decreased progressively with increased pearling depth, indicating a clear localization gradient. MAE with water enhanced extraction efficiency compared to conventional solvent-based methods, enabling environmentally friendly recovery. These findings demonstrate that controlled pearling can be used to enrich wheat fractions in phenolic acids and optimize functional ingredient development. Full article
(This article belongs to the Special Issue Green Extraction Technologies for Bioactive Compounds in Foods)
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26 pages, 4157 KB  
Article
Phosphate-Surface-Modified Silica Nanoparticles for 5-Fluorouracil as a Prolonged Drug Delivery System
by Aleksandra Lis, Arkadiusz Surażyński, Przemysław Koźmiński and Paweł Szymański
Pharmaceuticals 2026, 19(5), 802; https://doi.org/10.3390/ph19050802 - 21 May 2026
Viewed by 119
Abstract
Background/Objectives: This paper describes the synthesis of silica nanoparticles (SiNPs) and their surface modification with amino and phosphate groups (SiNPs-NH2-PO3). The functionalized nanoparticles were subsequently loaded with the anticancer drug 5-fluorouracil (SiNPs-NH2-PO3-5-FLU) and further modified [...] Read more.
Background/Objectives: This paper describes the synthesis of silica nanoparticles (SiNPs) and their surface modification with amino and phosphate groups (SiNPs-NH2-PO3). The functionalized nanoparticles were subsequently loaded with the anticancer drug 5-fluorouracil (SiNPs-NH2-PO3-5-FLU) and further modified with PEG2000 (SiNPs-NH2-PO3-5-FLU-PEG2000). Methods: In this study, a one-step, two-phase, sol–gel method carried out at room temperature was used to synthesize the nanoparticles. The size and surface zeta potential of the created SiNPs were determined by DLS measurements. HPLC was used to determine the amount of drug loaded into silica nanoparticles and the drug release profile in two different pH environments (slightly acidic and physiological). Based on physicochemical characteristics, the SiNPs-NH2-PO3-5-FLU and SiNPs-NH2-PO3-5-FLU-PEG2000 formulations were chosen for comprehensive characterization. The cytotoxicity of the studied complexes was assessed in MCF7 breast cancer cells, while their ability to induce apoptosis in those cells was examined using specific immunofluorescence markers: active caspase-7, active poly(ADP-ribose) polymerase (PARP), and p53 protein. Results: Our findings demonstrate that SiNPs-NH2-PO3-5-FLU can induce a stronger apoptotic response than free 5-FLU at equivalent concentrations. We observed that drug release occurs not only under physiological conditions but is further enhanced in a mildly acidic environment (pH 5.0), characteristic of the tumor microenvironment. Conclusions: Most 5-fluorouracil formulations are administered as injectable solutions, resulting in systemic exposure and significant adverse effects. However, their encapsulation within nanoparticles could favor preferential drug release in the acidic tumor microenvironment, thus supporting targeted therapy and reducing toxicity to healthy tissues. Moreover, PEGylation of the nanoformulation allows prolonged and controlled release. Full article
(This article belongs to the Section Pharmaceutical Technology)
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16 pages, 5797 KB  
Article
Ultrasound-Assisted Soaking Facilitates Purine Dissolution from Soybean Powder: Development and Preliminary Application of Low-Purine Soybean Powder
by Hongfeng Yu, Yuting Zheng, Lulu Yang, Yong Zhao, Xinxin Ma, Li Li and Haiquan Liu
Foods 2026, 15(10), 1827; https://doi.org/10.3390/foods15101827 - 21 May 2026
Viewed by 208
Abstract
People suffering from gout and hyperuricemia have limited consumption of soy products because of their high purine content, even though soybean is a nutrient-rich crop. This study developed a combined purine reduction process: ultrasonic-assisted soaking to promote purine dissolution and isoelectric point precipitation [...] Read more.
People suffering from gout and hyperuricemia have limited consumption of soy products because of their high purine content, even though soybean is a nutrient-rich crop. This study developed a combined purine reduction process: ultrasonic-assisted soaking to promote purine dissolution and isoelectric point precipitation to separate purines with minimal protein loss. A high-performance liquid chromatography (HPLC) method for rapid purine determination was first established (R2 > 0.9999, RSD < 0.23%), thereby providing technical support for process optimization. Using soybean powder as the raw material, optimal ultrasonic conditions (58 °C, 250 W, 58 min) were identified, achieving a purine removal rate of 61.15% with a protein recovery of 94.23%. Scanning electron microscopy (SEM) and Fourier-transform infrared (FTIR) spectroscopy analyses revealed that ultrasonic treatment altered the microstructure of the soybean powder, thereby facilitating purine dissolution. Low-purine soymilk prepared from the resulting soybean powder exhibited a unique flavor, with enhanced electronic nose response signals of its flavor compounds. This process effectively reduces purine content while preserving soy protein and flavor, offering a feasible technical solution for the development and industrial application of low-purine soy products. However, challenges remain in process scale-up and in optimizing the balance between purine removal and nutrient retention. Full article
(This article belongs to the Section Food Engineering and Technology)
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15 pages, 804 KB  
Article
Pharmacokinetic and Pharmacodynamic Assessments of the Ivermectin and Levamisole Combination to Control Resistant Nematodes in Cattle
by Candela Canton, Laura Ceballos, Lucila Canton, Laura Moreno, Paula Domínguez, Luis Alvarez and Carlos Lanusse
Pharmaceutics 2026, 18(5), 630; https://doi.org/10.3390/pharmaceutics18050630 - 21 May 2026
Viewed by 323
Abstract
Background/Objectives: Combination of antiparasitic drugs with different mechanisms of action has been suggested as an effective strategy to delay the development of parasite resistance. Considering the need to understand the pharmacological basis of drug combinations, the current study evaluated the potential pharmacokinetic (PK) [...] Read more.
Background/Objectives: Combination of antiparasitic drugs with different mechanisms of action has been suggested as an effective strategy to delay the development of parasite resistance. Considering the need to understand the pharmacological basis of drug combinations, the current study evaluated the potential pharmacokinetic (PK) interactions and the clinical efficacy (pharmacodynamic response) occurring after the subcutaneous administration of ivermectin (IVM) and levamisole (LEV), administered either as single treatments or concurrently to different groups of parasitized calves on three commercial farms (A, B and C). Methods: Forty-five (45) male calves naturally infected with gastrointestinal nematodes were randomly allocated into three groups (n = 15): IVM, treated with IVM by subcutaneous injection (0.2 mg/kg); LEV, treated subcutaneously with LEV (8 mg/kg); IVM + LEV, simultaneously treated with IVM and LEV (two subcutaneous injections at the same dose rates). Seven animals from each treated group (farm C) were randomly selected to perform the PK study. Drug concentrations were measured by HPLC. The therapeutic response (efficacy) was determined at 14 days after treatment by the fecal egg reduction test. Results: The mean area under the concentration vs time curve (AUC) for IVM obtained after administration of IVM alone (274 ± 65.1 ng.d/mL) was similar to that obtained when IVM was co-administered with LEV (295 ± 111 ng.d/mL). Likewise, mean LEV AUC values were similar after LEV administration alone (8.90 ± 2.69 µg.h/mL) or combined with IVM (9.11 ± 1.82 µg.h/mL). No adverse PK interactions were observed after the combined treatment, with similar PK parameters (p > 0.05) obtained between the single-drug and the combination-based strategies. On farm A, the overall fecal egg reductions were 38% (IVM), 99% (LEV) and 100% (IVM + LEV). While Cooperia spp. and Haemonchus spp. showed reduced susceptibility to IVM treatment, LEV demonstrated high efficacy against both genera, with only a minimal proportion of Haemonchus spp. remaining after treatment. Similarly, total fecal egg reductions were 42% (IVM), 99% (LEV) and 100% (IVM + LEV) on farm B, and 54% (IVM), 99% (LEV) and 100% (IVM + LEV) on farm C. On those farms, IVM was ineffective against Cooperia spp. and/or Haemonchus spp., while LEV failed to control Ostertagia spp. Remarkably, the combination of both molecules was the only treatment that achieved 100% efficacy against all nematode genera (Cooperia, Ostertagia, Haemonchus and Oesophagostomum spp.). Conclusions: Based on the described PK and pharmacodynamic (PD) assessments, the IVM + LEV combination appears to be a promising pharmacological option for controlling resistant gastrointestinal nematodes in cattle, with the additional potential to delay the progression of nematode anthelmintic resistance. Overall, the study provides original and robust pharmacokinetic and efficacy data that contribute to the optimization of parasite control strategies in cattle. This drug combination strategy may enhance treatment efficacy and contribute to improved parasite control in cattle production systems. Full article
(This article belongs to the Section Pharmacokinetics and Pharmacodynamics)
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18 pages, 1627 KB  
Article
Polyphenol-Rich Fruit Beverage Extracts Reduce Cytokine Secretion in THP-1 Cells
by Lea S. Edrich, Mats Kiene, Leona Heinke, Christian Tesch, Simone Stegmüller, Peter Winterhalter and Elke Richling
Nutrients 2026, 18(10), 1633; https://doi.org/10.3390/nu18101633 - 21 May 2026
Viewed by 213
Abstract
Background/Objectives. Inflammation, comprising many complex and finely coordinated immunological processes, represents a vital protective mechanism of the human body. By regulating inflammatory processes, cytokines play a key role in the modulation of the immune system. Secondary plant compounds such as polyphenols influence cellular [...] Read more.
Background/Objectives. Inflammation, comprising many complex and finely coordinated immunological processes, represents a vital protective mechanism of the human body. By regulating inflammatory processes, cytokines play a key role in the modulation of the immune system. Secondary plant compounds such as polyphenols influence cellular immunological processes which might contribute to ensuring a physiologically healthy immune status. Methods/Results. This study investigated eleven polyphenol-rich extracts from red fruit beverages in terms of potential inhibitory effects on pro-inflammatory cytokine secretion of leukemic monocyte THP-1 cells. Extracts originating from fruit juice (apple), fruit juice concentrate (red grape, black currant, pomegranate, elderberry, aronia), fruit juice puree (cranberry, blueberry) or fruit juice pulp (strawberry, sour cherry) were obtained by adsorption onto Amberlite® XAD-7 resin. The Folin–Ciocalteu assay showed a high content of phenolic compounds in the eleven extracts and HPLC-DAD-ESI-MSn analysis revealed that the extracts contained various anthocyanins in addition to copigments and polymers. Further screening using Lumit® Immunoassay showed that all tested extracts caused a reduction in pro-inflammatory cytokine secretion (interleukins (IL): IL-1β, IL-6, IL-8 and tumor necrosis factor TNF-α). The extracts from red grape and black currant were the most active ones. Conclusions. Overall, our results showed that polyphenol-rich fruit extracts can inhibit inflammatory processes in vitro. In vivo studies on the anti-inflammatory effect of fruit juice will be a promising approach to determine the fruit juice-dependent, health-promoting effects in humans. Full article
(This article belongs to the Special Issue Exploring the Role of Bioactive Compounds in Immunonutrition)
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25 pages, 10710 KB  
Article
PPARγ Deficiency in SZ95 Sebocytes Elicits Redox Stress and Impairs the Sequestosome/Autophagy-Mediated Clearance of Oxidized Lipids
by Alexandra Stiegler, Michaela Schirato, Ionela-Mariana Nagelreiter, Christina Bauer, Sarah Jelleschitz, Christopher Kremslehner, Christos C. Zouboulis, Dóra Kovács, Kinga Lénárt, Miriam Maiellaro, Emanuela Camera, Dániel Törőcsik and Florian Gruber
Lipidology 2026, 3(2), 18; https://doi.org/10.3390/lipidology3020018 - 20 May 2026
Viewed by 109
Abstract
Background/Objectives: Sebocytes, the primary cell type in sebaceous glands (SGs), produce a lipid mixture called sebum that is released onto the skin surface and is required for skin homeostasis. The lipid receptor Peroxisome Proliferator-Activated Receptor gamma (PPARγ) regulates sebocyte proliferation and lipid synthesis [...] Read more.
Background/Objectives: Sebocytes, the primary cell type in sebaceous glands (SGs), produce a lipid mixture called sebum that is released onto the skin surface and is required for skin homeostasis. The lipid receptor Peroxisome Proliferator-Activated Receptor gamma (PPARγ) regulates sebocyte proliferation and lipid synthesis and is involved in acne development. As inhibition of PPARγ has been shown to reduce insulin-induced lipogenesis and Akt/mTOR signalling in SZ95 sebocytes, we here investigated the effects of PPARγ deletion on lipid homeostasis and autophagic stress responses and how the secretomes affect dermal fibroblasts. Methods: SZ95 sebocytes wildtype (WT) and PPARγ knockout (KO) were shifted to low serum and EGF-deficient conditions permissive for autophagy. Untargeted and targeted HPLC-MS/MS analyses were used to analyze native and oxidized lipids, respectively. Protein levels of LC3I/II and p62 were assessed using immunoblots and immunofluorescence microscopy to investigate the autophagic flux. Dermal fibroblasts were exposed to conditioned media. Results: In low serum culture media, KO SZ95 sebocytes displayed significantly altered levels of 23 lipid classes. We observed a significant increase in ether-linked fatty acids as components of complex lipids and detected elevated levels of phospholipid hydroperoxides and aldehydolipids in the KO sebocytes. KO SZ95 sebocytes failed to show the typical responses to lipoxidative stress, such as elevated p62 crosslinking or inclusion body formation, and had reduced LC3II/I ratios as compared to WT cells. PPARγ KO conditioned media promoted a trend towards an inflammatory fibroblast phenotype. Conclusions: These findings suggest that PPARγ in sebocytes may alter the lipidome, elevate redox stress, and affect the autophagic machinery, which could cause accumulation of oxidized lipids and other potentially harmful compounds in sebocytes. Full article
(This article belongs to the Special Issue Lipid Metabolism and Inflammation-Related Diseases)
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20 pages, 2329 KB  
Article
Multivariate Robustness Modeling of Cannabidiol and Δ9-Tetrahydrocannabinol Quantification Using Two-Level Full Factorial Design
by Athip Maha, Thanapat Songsak, Surang Leelawat and Chaowalit Monton
Sci. Pharm. 2026, 94(2), 42; https://doi.org/10.3390/scipharm94020042 - 20 May 2026
Viewed by 220
Abstract
The present study aimed to establish a robustness modeling framework for the determination of cannabidiol (CBD) and Δ9-tetrahydrocannabinol (THC) in cannabis extract using a multivariate approach. A two-level full factorial design was implemented to examine four critical analytical factors, including methanol [...] Read more.
The present study aimed to establish a robustness modeling framework for the determination of cannabidiol (CBD) and Δ9-tetrahydrocannabinol (THC) in cannabis extract using a multivariate approach. A two-level full factorial design was implemented to examine four critical analytical factors, including methanol concentration (80–85% v/v), flow rate (0.8–1.2 mL/min), column temperature (23–27 °C), and detection wavelength (208–212 nm). Seven analytical responses for each compound were assessed, including peak area, retention time, resolution, asymmetry factor, number of theoretical plates, capacity factor, and peak area difference relative to the reference method. Statistical analysis demonstrated that both main effects and interaction effects significantly influenced the measured responses. Design space construction was performed based on predefined acceptance criteria to ensure method robustness: resolution > 1.5, asymmetry < 1.5, number of theoretical plates > 2000, capacity factor > 2, and peak area difference within −5% to 5%. Predictive performance of the developed models was verified by comparing predicted and experimental results. Good agreement was observed under most conditions, whereas deviation was noted for THC quantification at a detection wavelength of 212 nm. Furthermore, CBD and THC contents determined under three selected operating conditions within the established design space were statistically comparable to those obtained using the reference method, except for the condition employing 212 nm detection. The Analytical GREEnness Metric Approach (AGREE) assessment indicated moderate greenness performance of the analytical procedure. Overall, the multivariate two-level full factorial design proved to be an effective tool for robustness modeling of the HPLC method for simultaneous quantification of CBD and THC. Full article
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38 pages, 14417 KB  
Article
Interactions of the Tricyclic Antidepressant Drug Amitriptyline with L-DOPA in the Nucleus Accumbens, Prefrontal Cortex and Hippocampus of Unilaterally 6-OHDA-Lesioned Rats: Relevance to Depression in Parkinson’s Disease
by Kinga Kamińska, Tomasz Lenda, Jolanta Konieczny and Elżbieta Lorenc-Koci
Biomolecules 2026, 16(5), 743; https://doi.org/10.3390/biom16050743 - 19 May 2026
Viewed by 245
Abstract
The effects of antidepressants on limbic structures, important in the context of the treatment of Parkinson’s disease (PD)-associated depression, are relatively poorly explored in animal models. The present study investigated the impact of the tricyclic antidepressant amitriptyline (AMI), administered chronically alone or in [...] Read more.
The effects of antidepressants on limbic structures, important in the context of the treatment of Parkinson’s disease (PD)-associated depression, are relatively poorly explored in animal models. The present study investigated the impact of the tricyclic antidepressant amitriptyline (AMI), administered chronically alone or in combination with L-DOPA, on anhedonia, monoamine levels, and the binding of radioligands to their transporters in the limbic structures of unilaterally 6-OHDA-lesioned rats. Anhedonia, as a core symptom of depression, was evaluated using the sucrose preference test. Tissue concentrations of noradrenaline (NA), dopamine (DA) and serotonin (5-HT) and their metabolites in the prefrontal cortex (PFC) and hippocampus (HIP) were assayed by HPLC method. Bindings of [3H]nisoxetine to noradrenaline transporter (NET), [3H]GBR 12,935 to dopamine transporter (DAT), and [3H]citalopram to serotonin transporter (SERT) in the nucleus accumbens (NAcc), PFC, and HIP were analyzed by autoradiography. Three weeks of treatment of unilaterally 6-OHDA-lesioned rats with AMI alone significantly reduced the intake of sucrose solution compared to the sham-operated control, but the combined administration of AMI+L-DOPA enhanced sucrose consumption. Administration of AMI+L-DOPA increased tissue DA concentrations in the lesioned and intact PFC and HIP more distinctly than L-DOPA alone. L-DOPA alone significantly decreased tissue 5-HT content in the lesioned PFC and HIP, while the addition of AMI reversed this effect. 6-OHDA administered unilaterally into the MFB drastically decreased DAT binding in the lesioned NAcc while increasing it on the intact side. Neither AMI nor L-DOPA, given alone or jointly, affected DAT binding in the lesioned NAcc. SERT binding was significantly reduced in the PFC, NAcc and HIP on both sides of the brain in the AMI- or AMI+L-DOPA-treated groups. NET binding decreased in the PFC and NAcc in the AMI-treated group, but no such effect was observed in the AMI+L-DOPA-treated group. The obtained results are discussed in relation to the impaired psychiatric functions in PD. Full article
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15 pages, 869 KB  
Article
Comparative Biochemical and Aroma Profiling of Three Dried Chinese Mulberry (Morus spp.) Genotypes
by Junrong Huang, Mesut Ada, Doğan Ergün, Müjgan Güney, Salih Kafkas, Nesibe Ebru Kafkas and Wen Yang
Int. J. Mol. Sci. 2026, 27(10), 4534; https://doi.org/10.3390/ijms27104534 - 18 May 2026
Viewed by 112
Abstract
This study aimed to evaluate genotype-dependent variation in biochemical composition, antioxidant capacity, and aroma profiles of dried Chinese mulberry (Morus spp.) genotypes. Three cultivars, Lvmeiren (green), Zhenzhubai (white), and Yunsang No 2 (red), were analyzed. Organic acids and sugars were determined using [...] Read more.
This study aimed to evaluate genotype-dependent variation in biochemical composition, antioxidant capacity, and aroma profiles of dried Chinese mulberry (Morus spp.) genotypes. Three cultivars, Lvmeiren (green), Zhenzhubai (white), and Yunsang No 2 (red), were analyzed. Organic acids and sugars were determined using HPLC, while total phenolic content, antioxidant capacity (DPPH and FRAP), and total anthocyanins were quantified using spectrophotometric methods. Volatile compounds were analyzed by HS-SPME/GC–MS. Significant differences were observed among genotypes for all measured parameters. Among the studied genotypes, Yunsang No 2 exhibited the highest total phenolic content (379.59 mg GAE g−1 DW), FRAP value (21.51 μmol g−1 DW), and anthocyanin content (37.1 mg L−1). In contrast, Lvmeiren was characterized by markedly higher sucrose (22.57%) and succinic acid (3.69%) contents. Zhenzhubai exhibited the highest glucose (25.82%) and fructose (32.65%) contents, together with elevated citric (2.58%) and malic acid (2.93%) levels. Yunsang No 2 showed markedly higher total phenolics, anthocyanins, and antioxidant capacity, indicating superior nutraceutical potential. Volatile compound analysis revealed aldehydes and alcohols as dominant groups in Lvmeiren and Zhenzhubai, while acids were predominant in Yunsang No 2. Multivariate analyses (PCA and hierarchical clustering) clearly separated genotypes based on biochemical and antioxidant traits. These findings demonstrate that genotype plays a critical role in determining the nutritional quality and aroma profile of dried mulberries and provide valuable insights for breeding, cultivar selection, and functional food applications. Full article
(This article belongs to the Special Issue Methodological Advances in Phytochemical Analysis)
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