Publications by authors named "Filip Zavadil-Kokas"

The development of canine immunotolerant monoclonal antibodies can accelerate the invention of new medicines for both canine and human diseases. We develop a methodology to clone the naive, somatically mutated variable domain repertoire from canine B cell mRNA using 5'RACE PCR. A set of degenerate primers were then designed and used to clone variable domain genes into archival "holding" plasmid libraries.

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Objectives: Endometrial cancer (EC) is the most common malignancy of the female genital tract in developed countries, yet preventive screening remains unavailable, and diagnostic approaches are largely limited to symptomatic women. Despite advancements in precision oncology, the biology of precancerous lesions is less understood compared to advanced disease. To address this gap, we conducted a prospective case-control study analysing uterine lavage fluid from women undergoing diagnostic evaluation.

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Article Synopsis
  • - TP73, part of the TP53 gene family, produces different protein variants (TAp73 and ΔTAp73) with opposing functions through various genetic mechanisms.
  • - Newly developed antibodies for these p73 variants reveal that TAp73 is present in multiciliated epithelial cells, while ΔTAp73 marks non-proliferative basal cells in squamous epithelium.
  • - In cervical squamous cell carcinomas, p73α is commonly expressed and linked to lower tumor grades, whereas TAp73 appears less frequently and does not show significant associations with cancer characteristics.
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  • PD-L1 expression is a key factor in how cancer cells escape the immune system, and targeting the PD-L1/PD1 interaction is a common immunotherapy for melanoma patients, although many still do not respond.
  • This study focused on different human melanoma cell lines with varying p53 status to examine the relationship between p53, PD-L1, and immune responses, using techniques like immunoblotting and flow cytometry.
  • Results indicated that the loss of p53 impacts PD-L1 levels through the regulation of IRF1 and SOX10, and influences the ability of natural killer (NK) cells to kill tumor cells, highlighting the complex interplay of these factors in cancer immune response.
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Article Synopsis
  • Monoclonal antibodies that target immune checkpoints are changing cancer treatment, but their effectiveness varies and can lead to unexpected issues like hyperprogression.
  • Current animal research models, especially mice, don’t accurately reflect the human immune system and patient differences, creating a need for better models.
  • This study introduces two new antibodies that effectively target canine PD-1, offering valuable tools for canine cancer research and potential new treatments for dogs with cancer.
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Background: Roots play an important role during plant growth and development, ensuring water and nutrient uptake. Understanding the mechanisms regulating their initiation and development opens doors towards root system architecture engineering.

Results: Here, we investigated by RNA-seq analysis the changes in gene expression in the barley stem base of 1 day-after-germination (DAG) and 10DAG seedlings when crown roots are formed.

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Interferon induced transmembrane proteins (IFITMs) play a dual role in the restriction of RNA viruses and in cancer progression, yet the mechanism of their action remains unknown. Currently, there is no data about the basic biochemical features or biophysical properties of the IFITM1 protein. In this work, we report on description and biochemical characterization of three conformational variants/oligomeric species of recombinant IFITM1 protein derived from an expression system.

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Breast cancer is a highly heterogeneous disease. Its intrinsic subtype classification for diagnosis and choice of therapy traditionally relies on the presence of characteristic receptors. Unfortunately, this classification is often not sufficient for precise prediction of disease prognosis and treatment efficacy.

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Interferons (IFNs) are important cytokines that regulate immune responses through the activation of hundreds of genes, including interferon-induced transmembrane proteins (IFITMs). This evolutionarily conserved protein family includes five functionally active homologs in humans. Despite the high sequence homology, IFITMs vary in expression, subcellular localization and function.

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The TGF-β signaling pathway is involved in numerous cellular processes, and its deregulation may result in cancer development. One of the key processes in tumor progression and metastasis is epithelial to mesenchymal transition (EMT), in which TGF-β signaling plays important roles. Recently, AGR2 was identified as a crucial component of the cellular machinery responsible for maintaining the epithelial phenotype, thereby interfering with the induction of mesenchymal phenotype cells by TGF-β effects in cancer.

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Article Synopsis
  • DNA and RNA binding proteins (DRBPs) are key regulators of cellular processes and play a vital role in gene expression and nucleotide metabolism across all life forms.
  • Dysregulation of these proteins can lead to various diseases, particularly cancer, as they often have overlapping functions and are crucial for understanding the molecular mechanisms of tumor development.
  • The review highlights different classes of DRBPs, their biochemical properties, and their potential as therapeutic targets in cancer treatment by analyzing existing protein databases and identifying specific DRBPs associated with various cancer types.
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Background: Meningioma is the most common primary central nervous system neoplasm, accounting for about a third of all brain tumors. Because their growth rates and prognosis cannot be accurately estimated, biomarkers that enable prediction of their biological behavior would be clinically beneficial.

Objective: To identify coding and noncoding RNAs crucial in meningioma prognostication and pathogenesis.

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Background: The identification of mutated proteins in human cancer cells-termed proteogenomics, requires several technologically independent research methodologies including DNA variant identification, RNA sequencing, and mass spectrometry. Any one of these methodologies are not optimized for identifying potential mutated proteins and any one output fails to cover completely a specific landscape.

Methods: An isogenic melanoma cell with a p53-null genotype was created by CRISPR/CAS9 system to determine how p53 gene inactivation affects mutant proteome expression.

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Cytokinins are plant hormones with biological functions ranging from coordination of plant growth to the regulation of biotic and abiotic stress-related responses and senescence. The components of the plant immune system can learn from past elicitations by microbial pathogens and herbivores and adapt to new threats. It is known that plants can enter the primed state of enhanced defense induced by either natural or synthetic compounds.

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Recent technological advances have made next-generation sequencing (NGS) a popular and financially accessible technique allowing a broad range of analyses to be done simultaneously. A huge amount of newly generated NGS data, however, require advanced software support to help both in analyzing the data and biologically interpreting the results. In this article, we describe SATrans (Software for Annotation of Transcriptome), a software package providing fast and robust functional annotation of novel sequences obtained from transcriptome sequencing.

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