Publications by authors named "Vlase Laurian"

Background: Blackcurrant ( L.) leaves are valuable sources of bioactive compounds, including phenolic acids, flavonoids, and tannins, which contribute to their potent antioxidant, anti-inflammatory, and antimicrobial properties.

Objectives: The overall aim of this study was to investigate the antimicrobial potential of extracts rich in bioactive compounds from blackcurrant leaves prepared in natural deep eutectic solvents (NaDESs).

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: In psychiatric disorders, antipsychotics and antidepressant medication are often administered together. Aripiprazole, a third-generation antipsychotic drug, is extensively metabolized by CYP2D6 and CYP3A4 isoenzymes, while bupropion, used in depressive disorders, is known as a moderate or strong CYP2D6 enzyme inhibitor. This in vivo experiment aimed to assess the presence of a pharmacokinetic drug interaction between aripiprazole and bupropion and its magnitude on the systemic exposure of aripiprazole.

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  • Linezolid shows significant variability in critically ill patients, affecting its plasma concentration and potentially its effectiveness, prompting the need for optimized dosing strategies.
  • A study was conducted comparing two administration methods (intermittent infusion vs. continuous infusion) to assess their impact on pharmacokinetics and drug concentration in critically ill patients.
  • Results indicated that continuous infusion led to more stable serum concentrations and better adherence to desired pharmacokinetic/pharmacodynamic indices, suggesting it could improve patient safety and outcomes compared to intermittent infusion.
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A series of thiazolyl-catechol compounds with antioxidant and cytotoxic activities were synthesized by a Hantzsch heterocyclization, using diverse thioamides as the thiocarbonyl component and 4-chloroacetyl-catechol as haloketone. These compounds were characterized by MS, IR spectroscopy, and NMR. Their antioxidant potential was evaluated by antiradical, electron transfer, and ferrous ion chelation assays using ascorbic acid, Trolox, and EDTA-Na as references.

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Melatonin is commonly found in various fruits, juices, and some fermented beverages. Its concentration in wine is influenced by soil properties, climatic factors, and yeast activity. Even if it is found in fermented beverages in relatively low proportions, melatonin still holds significant nutritional value, giving anti-aging properties, anti-inflammatory actions, and antidepressant effects.

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The species of the genus present important medicinal potential according to their traditional uses. However, few studies aim to sustain this fact by scientific evidence. The present study aimed to explore the phytochemical profile and investigate the antioxidant, antimicrobial and antiproliferative potential of subsp.

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Background: Cancer stem-like cells (CSCs) have been extensively researched as the primary drivers of therapy resistance and tumor relapse in patients with breast cancer. However, due to lack of specific molecular markers, increased phenotypic plasticity and no clear clinicopathological features, the assessment of CSCs presence and functionality in solid tumors is challenging. While several potential markers, such as CD24/CD44, have been proposed, the extent to which they truly represent the stem cell potential of tumors or merely provide static snapshots is still a subject of controversy.

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Two series, "" and "", each consisting of nine chemical compounds, with 2,3-disubstituted quinazolin-4(3H)-one scaffold, were synthesized and evaluated for their anticonvulsant activity. They were investigated as dual potential positive allosteric modulators of the GABA receptor at the benzodiazepine binding site and inhibitors of carbonic anhydrase II. Quinazolin-4(3H)-one derivatives were evaluated in vivo (D = 50, 100, 150 mg/kg, administered intraperitoneally) using the pentylenetetrazole (PTZ)-induced seizure model in mice, with phenobarbital and diazepam, as reference anticonvulsant agents.

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Considering the pivotal role of angiogenesis in solid tumor progression, we developed a novel series of quinazoline-thiazole hybrids () as antiproliferative and anti-angiogenic agents. Four out of the seven compounds displayed superior antiproliferative activity (IC =1.83-4.

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  • Hairy willowherb (EH) is a plant native to Europe and Asia, known for its use in folk medicine in Romania, where it includes 17 species.
  • This study explored EH's anti-inflammatory properties using Wistar rats and found that its optimized extract had effects similar to indomethacin, a common anti-inflammatory drug.
  • The research also tested EH's antitumor effects on Swiss albino mice with a specific type of cancer, showing the extract reduced tumor-related inflammation and markers of oxidative stress, suggesting its potential as a natural therapeutic option.
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  • The study examined the effects of diethyl ether (GvDEE) and butanol (GvBuOH) extracts from a specific plant (L.) on A375 human malignant melanoma cells to assess their antitumor potential.
  • GvDEE showed a higher antioxidant capacity and antimicrobial activity against Gram-positive bacteria compared to GvBuOH, which had no antimicrobial effects.
  • Both extracts significantly reduced the viability of A375 cells, with GvDEE causing 69% reduction at a certain dose, and both extracts led to apoptosis, indicating their potential as treatments for skin cancer.
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  • - This study explored how a special cell line of Digitalis purpurea (DpHQ) can transform hydroquinone into arbutin, which has important uses in therapy and cosmetics.
  • - Researchers found that the amount of arbutin produced depended on the concentration of hydroquinone and sugars, with higher sugar levels and sequential doses leading to better yields.
  • - Importantly, this research is the first to show that DpHQ can tolerate high levels of hydroquinone and efficiently convert it to arbutin, highlighting its potential for biotechnological applications.
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TMAO, a gut microbiota derived byproduct, has been associated with various cardiometabolic diseases by promoting oxidative stress and inflammation. The liver is the main organ for TMAO production and chronic exposure to high doses of TMAO could alter its function. In this study, we evaluated the effect of chronic exposure of high TMAO doses on liver oxidative stress, inflammation, and fibrosis.

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species are used worldwide for their antioxidant, antibacterial, antifungal, and antiparasitic properties. Although this plant has demonstrated its antitumor properties on various types of cancer, its biological activity on cutaneous melanoma has not been established so far. Therefore, the present study was designed to investigate the phytochemical profile of two extracts of L.

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This study aimed to investigate the polyphenolic composition and antioxidant and antimicrobial potential of six Romanian Stachys species: , , , , , and . The LC-MS/MS method was used to analyze the polyphenolic profile, while the phenolic contents were spectrophotometrically determined. The antioxidant activity was evaluated using the following methods: DPPH, FRAP, nitrite-induced autooxidation of hemoglobin, inhibition of cytochrome -catalyzed lipid peroxidation, and electron paramagnetic resonance spectroscopy.

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Oxidative stress is linked to a series of diseases; therefore, the development of efficient antioxidants might be beneficial in preventing or ameliorating these conditions. Based on the structure of a previously reported compound with good antioxidant properties and on computational studies, we designed several catechol derivatives with enhanced antioxidant potential. The compounds were synthesized and physicochemically characterized, and their antioxidant activity was assessed through different antiradical, electron transfer and metal ions chelation assays, their electrochemical behavior and cytotoxicity were studied.

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Taraxaci folium and Matricariae flos plant extracts contain a wide range of bioactive compounds with antioxidant and anti-inflammatory effects. The aim of the study was to evaluate the phytochemical and antioxidant profile of the two plant extracts to obtain a mucoadhesive polymeric film with beneficial properties in acute gingivitis. The chemical composition of the two plant extracts was determined by high-performance liquid chromatography coupled with mass spectrometry.

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One of the objectives of this study consists of the assessment of the antitumor activity of several extracts from three selected plant species: L., L., and L.

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The present research investigated the in vivo anti-inflammatory and cardioprotective activities, as well as the antioxidant potential of tincture (TOT), in relation to the polyphenolic composition. Chromatographic and spectrophotometric techniques were used to determine the polyphenolic profile of TOT and the antioxidant activity was preliminarily assessed in vitro by DPPH• and FRAP spectrophotometric methods. The in vivo anti-inflammatory and cardioprotective activities were studied in rat turpentine-induced inflammation and in rat isoprenaline-induced myocardial infarction (MI) models.

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The objectives of the present study consisted of identifying the impact of extraction methods and parameters held over the phytochemistry and biological activities of green coffee beans. Extraction processes belonging to two categories were performed: classical methods-maceration, Soxhlet extraction, and such innovative methods as turboextraction, ultrasound-assisted extraction, and a combination of the latter two. Total polyphenolic and flavonoid content, as well as in vitro antioxidant activity of the resulted extracts were spectrophotometrically determined.

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Coccidiosis in pigs seldom results in important economic losses. However, it can influence growth rates in weaners and it is an important hygiene indicator in swine farms. Certain herbs, along with their extracts, have been used over the course of history in traditional medicine.

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The development of hybrid molecules with significant human therapeutic properties is one of the main approaches of pharmaceutical research. One of the most important pharmacophores is the quinazolin-4(3H)-one heterocycle moiety, due to its wide range of biological activities. By its derivatization with polyphenolic compounds, in our previous research, it proved to possess a good antiradical activity of -diphenolic derivatives of quinazolin-4(3H)-one.

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  • Romanian folk medicine utilizes endemic plant species for treating benign prostate hyperplasia (BPH), yet there's limited scientific evidence on their effectiveness.
  • This research focused on evaluating the phytochemical properties of five endemic plant species and assessing their biological activities using optimized extraction techniques.
  • Findings revealed strong antioxidant properties, notable antimicrobial effects against certain bacteria, and significant anti-cancer and anti-inflammatory potential in extracts, particularly from the aerial parts of the plants.
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The aim of this study was to identify possible influences of extraction methods as well as extraction parameters on the phytochemical and biological profiles of L. extracts. Extraction methods were chosen as follows: classical methods, maceration and Soxhlet extraction; innovative extraction methods, turboextraction, ultrasound-assisted extraction, and a combination of the latter two.

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Neo-adjuvant therapy (NAT) is increasingly used in the clinic for the treatment of breast cancer (BC). Pathological response to NAT has been associated with improved patients' survival; however, the current techniques employed for assessing the tumor response have significant limitations. Small EVs (sEVs)-encapsulated miRNAs have emerged as promising new biomarkers for diagnosis and prediction.

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