Publications by authors named "Bielawski K"

Introduction: Despite achieving sustained viral response (SVR) after treatment with direct-acting antivirals (DAAs), the risk of liver disease progression and extrahepatic complications in chronic hepatitis C (CHC) remains. We aimed to determine the role of residual HCV-RNA in peripheral blood mononuclear cells (PBMCs), a condition known as occult hepatitis C (OCI), and systemic inflammatory markers as predictors of long-term outcomes in patients treated with DAAs.

Methods: We followed 42 patients treated with DAAs with OCI status determined after therapy, for a median of 6.

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Many pathogens including viruses enter cells by endocytosis. We identified and evaluated novel endocytosis inhibitors capable of blocking the entry of the HIV-1 Transactivation of Transcription protein (Tat) protein into neuronal cells and investigated their potential protective properties against Tat-induced neurotoxicity. In this study, the compounds Les-6631 and Les-6633 were synthesized and assessed.

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Gastric cancer remains a significant therapeutic challenge, highlighting the need for new strategies to improve treatment efficacy. This study investigates the potential of combined therapy with the novel Thiopyrano[2,3-]Thiazole derivative LES-6400 and the anti-HER2 antibody trastuzumab in AGS gastric cancer cells. The antitumor effects of the combined therapy were evaluated using various techniques, including the MTT assay for cell viability, [H]-thymidine incorporation for DNA synthesis, and flow cytometry to assess apoptosis (Annexin V-FITC/PI staining), mitochondrial membrane potential (MMP), and inflammatory cytokine levels.

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Edible mushrooms are not only a valued culinary ingredient but also have several potential medicinal and industrial applications. They are a rich source of protein, fiber, vitamins, minerals, and bioactive compounds such as polysaccharides and terpenoids, and thus have the capacity to support human health. Some species have been shown to have antioxidant, anti-inflammatory, anticancer, and immunomodulatory properties.

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Breast cancer has the highest incidence rate among all malignancies worldwide. Its high mortality is mainly related to the occurrence of multidrug resistance, which significantly limits therapeutic options. In this regard, there is an urgent need to develop compounds that would overcome this phenomenon.

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The development of new, effective agents for the treatment of breast cancer remains a high-priority task in oncology. A strategy of treatment for this pathology depends significantly on the genotype and phenotype of human breast cancer cells. We aimed to investigate the antitumor activity of new pyrrolidinedione-thiazolidinone hybrid molecules , , and towards different types of human breast cancer cells of MDA-MB-231, MCF-7, T-47D, and HCC1954 lines and murine breast cancer 4T1 cells by using the MTT, clonogenic and [H]-Thymidine incorporation assays, flow cytometry, ELISA, and qPCR.

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Breast cancer is a major malignancy among women, characterized by a high mortality rate. The available literature evidence indicates that selenium, as a trace element, has chemopreventive properties against many types of cancer; as such, compounds containing it in their structure may potentially exhibit anticancer activity. Accordingly, we have undertaken a study to evaluate the effects of novel selenoesters (EDAG-1, -7, -8, -10) on MCF-7 and MDA-MB-231 breast cancer cells.

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The study aims to synthesize a novel bis(thiosemicarbazone) derivative based on platinum (thioPt) and evaluate its anticancer properties against MFC-7 and MDA-MB-231 breast cancer cells. A new platinum complex was synthesised by reacting KPtCl with 2,2'-(1,2-diphenylethane-1,2-diylidene)bis(hydrazine-1-carbothioamide) in ethanol in the presence of KCO. In the obtained complex, the platinum atom is coordinated by a conjugated system = N-NC-S-The structures of the new compound were characterised using NMR spectroscopy, HR MS, IR, and X-ray structural analysis.

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In the last decade, an increasing interest in compounds containing pyrazolo[4,3-][1,2,4]triazine moiety is observed. Therefore, the aim of the research was to synthesise a novel sulphonyl pyrazolo[4,3-][1,2,4]triazines (, ) and pyrazolo[4,3-]tetrazolo[1,5-][1,2,4]triazine sulphonamide derivatives (, ) to assess their anticancer activity. The MTT assay showed that , , , have stronger cytotoxic activity than cisplatin in both breast cancer cells (MCF-7 and MDA-MB-231) and exhibited weaker effect on normal breast cells (MCF-10A).

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(1) Background: The purpose of the given study was to examine the antitumor activity of the simultaneous administration of MM-129, a 1,2,4-triazine derivative, and indoximod (IND), the kynurenine pathway inhibitor, toward colon cancer. (2) Methods: The efficiency of the co-administration of the studied compounds was assessed in xenografted zebrafish embryos. Then, the effects of the combined administration of compounds on cellular processes such as cell viability, apoptosis, and intracellular signaling pathways were evaluated.

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Design of tubulin inhibitors as anticancer drugs dynamically developed over the past 20 years. The modern arsenal of potential tubulin-targeting anticancer agents is represented by small molecules, monoclonal antibodies, and antibody-drug conjugates. Moreover, targeting tubulin has been a successful strategy in the development of antiparasitic drugs.

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Antibody-Drug Conjugates (ADC) are a new class of anticancer therapeutics with immense potential. They have been rapidly advancing in the last two decades. This fast speed of development has become possible due to several new technologies and methods.

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Article Synopsis
  • Photodynamic therapy (PDT) is emerging as a viable treatment for premalignant lesions in oral tissues, but delivering the photosensitizer effectively poses challenges due to poor adherence to the mucosal surface.
  • A study evaluated emulgels made from natural polysaccharide gums (tragacanth, xanthan, gellan) as effective carriers for delta-aminolevulinic acid (ALA), with findings showing these emulgels had improved mucoadhesiveness compared to commercial gels and enhanced ALA absorption.
  • The tragacanth/xanthan emulgel not only improved the retention of the photosensitizer in oral tissues but also demonstrated low cell toxicity and non-irritancy, suggesting its potential
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L. (commonly known as bog bilberry) and L. (commonly known as bilberry) are species of the genus (family ).

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Atomic force microscopy (AFM) has become indispensable for studying biological and medical samples. More than two decades of experiments have revealed that cancer cells are softer than healthy cells (for measured cells cultured on stiff substrates). The softness or, more precisely, the larger deformability of cancer cells, primarily independent of cancer types, could be used as a sensitive marker of pathological changes.

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Endocytosis is one of the major ways cells communicate with their environment. This process is frequently hijacked by pathogens. Endocytosis also participates in the oncogenic transformation.

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Despite the advancements in breast cancer (BrC) diagnosis and treatment, a considerable proportion of patients with early-stage disease still experience local recurrence or metastasis. This study aimed to assess the levels of specific angiogenic parameters in the EDTA plasma of BrC patients before and after treatment and to explore their clinical and prognostic significance. The levels of vascular endothelial growth factor A (VEGF-A), soluble form of vascular endothelial growth factor receptor type 1 (sVEGFR1), and soluble form of vascular endothelial growth factor receptor type 2 (sVEGFR2) were measured in 84 early BrC patients, both prior to surgery and within a median time of nine months post-treatment.

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Dysregulation of iron metabolism in chronic hepatitis C (CHC) is a significant risk factor for hepatic cirrhosis and cancer. We studied if known genetic variants related to iron homeostasis associate with liver disease progression in CHC. Retrospective analysis included 249 CHC patients qualified for antiviral therapy between 2004 and 2014.

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Background Premature and early menopause are independently associated with greater risk of cardiovascular disease (CVD). However, mechanisms linking age of menopause with CVD remain poorly characterized. Methods and Results We measured 71 circulating CVD protein biomarkers in 1565 postmenopausal women enrolled in the FHS (Framingham Heart Study).

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Article Synopsis
  • A series of new ursolic acid (UA) derivatives were created by attaching various amino acids or dipeptides at the C-3 position, aiming to enhance their anticancer properties.
  • Three of these derivatives demonstrated notable cytotoxic effects on breast cancer cell lines, particularly reducing specific matrix metalloproteinases linked to cancer progression.
  • Further analysis revealed distinct mechanisms behind their actions, including activation of apoptosis for two compounds and autophagy induction for another, while also predicting their absorption, distribution, metabolism, and excretion (ADME) properties for potential therapeutic development.
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The study enrolled 284 patients with chronic hepatitis B virus infection. Participants included people with mild fibrotic lesions (32.5%), moderate to severe fibrotic lesions (27.

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Combining chemotherapy with immunotherapy still remains a regimen in anticancer therapy. Novel 4-thiazolidinone-bearing hybrid molecules possess well-documented anticancer activity, and together with anti-HER2 antibodies, may represent a promising strategy in treating patients with gastric cancer with confirmed human epidermal growth factor receptor 2 (HER2) expression. The aim of the study was to synthesize a new 4-thiazolidinone derivative (Les-4367) and investigate its molecular mechanism of action in combination with trastuzumab or pertuzumab in human AGS gastric cancer cells.

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A series of 11-substituted 9-hydroxy-3,5,10,11-tetrahydro-2H-benzo[6,7]thiochromeno[2,3-d][1,3]thiazole-2,5,10-triones 3.1-3.13 were synthesized via hetero-Diels-Alder reaction of 5-ene-4-thioxo-2-thiazolidinones and 5-hydroxy-1,4-naphthoquinone (juglone).

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In 2020, breast cancer became the most frequently diagnosed type of cancer, with nearly 2.3 million new cases diagnosed. However, with early diagnosis and proper treatment, breast cancer has a good prognosis.

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Since the role of sialome-Siglec axis has been described as a regulatory checkpoint of immune homeostasis, the promotion of stimulatory or inhibitory Siglec-related mechanisms is crucial in cancer progression and therapy. Here, we investigated the effect of tamoxifen on the sialic acid-Siglec interplay and its significance in immune conversion in breast cancer. To mimic the tumour microenvironment, we used oestrogen-dependent or oestrogen-independent breast cancer cells/THP-1 monocytes transwell co-cultures exposed to tamoxifen and/or β-estradiol.

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