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Tytuł:
Zaburzenia procesu O-GlcNAcylacji w nowotworach
Alterations of O-GlcNAcylation process in cancers
Autorzy:
Ciesielski, Piotr
Krześlak, Anna
Powiązania:
https://bibliotekanauki.pl/articles/1032551.pdf
Data publikacji:
2014
Wydawca:
Łódzkie Towarzystwo Naukowe
Tematy:
o-glcnacylacja
nowotwory
cykl komórkowy
czynniki
transkrypcyjne
transdukcja sygnału
glikoliza
metastaza
o-glcnacylation
cancers
cell cycle
transcription factors
signal
transduction
glycolysis
metastasis
Opis:
O-GlcNAcylation is a post-translational modification involving the addition of a N-acetylglucosamine moiety to the serine/threonine residues of cytosolic or nuclear proteins. Two enzymes are responsible for cyclic O-GlcNAcylation: O-GlcNAc transferase (OGT) which catalyzes the addition of the GlcNAc moiety from UDP-GlcNAc to target proteins and O-GlcNAcase (OGA) which catalyses the hydrolytic removal of the sugar moiety from proteins. Dynamic and reversible O-GlcNAcylation is emerging as an important regulator of diverse cellular processes, such as signal transduction, metabolism, transcription, translation, proteasomal degradation and cell cycle. O-GlcNAcylation occurs on serine or threonine residues of proteins at sites that may also be phosphorylated. Therefore, an extensive crosstalk exists between phosphorylation and O-GlcNAcylation. Recent studies indicate that increased O-GlcNAcylation is a general feature of cancer. Elevated O-GlcNAcylation (hyper-OGlcNAcylation) occurs in many human malignancies including solid tumors such as lung, prostate, breast, colorectal, liver, pancreatic cancers as well as non-solid cancers such as chronic lymphocytic leukemia. The changes in O-GlcNAcylation are associated with the changes in OGT and OGA expression levels. Hyper-O-GlcNAcylation may be linked to the various hallmarks of cancer, including cancer cell proliferation, survival, invasion, metastasis and metabolism. This paper reviews recent findings related to O-GlcNAc-dependent regulation of signaling pathways, cell cycle, transcription factors, and metabolic enzymes in cancer cells.
O-GlcNAcylacja jest odwracalną potranslacyjną modyfikacją białek polegającą na przyłączeniu wiązaniem O-glikozydowym pojedynczych reszt β-N-acetyloglukozaminy (GlcNAc) do seryny lub treoniny. W proces O-GlcNAcylacji włączone są dwa enzymy: O-GlcNAc transferaza (OGT), enzym odpowiedzialny za przyłączanie reszt N-acetyloglukozaminy i β-N-acetyloglukozaminidaza (OGA), która katalizuje reakcję odłączania reszt GlcNAc. Dynamiczna i odwracalna O-GlcNAcylacja odgrywa istoną rolę w regulacji szeregu procesów komórkowych, takich jak przekazywanie sygnału, metabolizm, transkrypcja, translacja, degradacja białek w proteasomach i cykl komórkowy. Ponieważ O-GlcNAcylacja dotyczy reszt seryny lub treoniny, które znajdują się w miejscach rozpoznawanych przez kinazy białkowe, wpływa ona na poziom fosforylacji wielu białek i isnieje ścisła zależność pomiędzy tymi modyfikacjami. Ostanie badania wskazują, że w komórkach nowotworowych dochodzi do znacznego zwiększenia poziomu O-GlcNAcylacji. Hiper-O-GlcNAcylację stwierdzono w różnych typach nowotworów, włączając w to guzy lite np. płuc, prostaty, piersi, jelita grubego, trzustki, wątroby a także białaczki np. przewlekłą białaczkę limfatyczną. Zaburzenia O-GlcNAcylacji związane są ze zmianami w komórkach nowotworowych ekspresji enzymów odpowiedzialnych za ten proces, tj. OGT i OGA. Hiper-O-GlcNAcylacja wpływa na proliferację, przeżycie i metabolizm komórek nowotworowych, jak również zwiększa ich zdolność do inwazji i metastazy. Prezentowana praca stanowi przegląd aktualnych informacji dotyczących roli O-GlcNAcylacji w regulacji szlaków przekazywania sygnałów, cyklu komórkowego, czynników transkrypcyjnych oraz enzymów i innych białek związanych z metabolizmem komórek nowotworowych.
Źródło:
Folia Medica Lodziensia; 2014, 41, 1; 65-91
0071-6731
Pojawia się w:
Folia Medica Lodziensia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The role of miRNAs upon metal stress in Arabidopsis thaliana
Autorzy:
Gielen, H.
Remans, T.
Vangronsveli, J.
Cuypers, A.
Powiązania:
https://bibliotekanauki.pl/articles/80906.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
microRNA
metal stress
plant
Arabidopsis thaliana
reactive oxygen species
gene expression
oxidative stress
signal transduction
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The basic biology of erbB-2 and its participation in colorectal cancers
Autorzy:
Stawińska, Magdalena
Bryś, Magdalena
Krajewska, Wanda M
Powiązania:
https://bibliotekanauki.pl/articles/764806.pdf
Data publikacji:
2005
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
ErbB-2
colorectal cancers
signal transduction
tumour growth
Opis:
ErbB-2 is one of Tour cell surface growth factor receptors involved in transmission of signals controlling normal cell growth and differentiation. A range of growth factors serve as ligands, but none is specific for the ErbB-2 receptor. Ligand binding to ErbB-1, ErbB-3 and ErbB-4 induces rapid receptor dimerization, with a marked preference for ErbB-2 as a dimer partner. When ErbB-2 is overexpressed multiple ErbB-2 heterodimers are formed and cell signalling is stronger, resulting in enhanced responsiveness to growth factors and malignant growth. This explains why ErbB-2 overexpression is an indicator of poor prognosis in colorectal cancers and may be predictive of response to treatment. ErbB-2 is a highly specific and promising target for new colon cancer treatments.
Źródło:
Acta Universitatis Lodziensis. Folia Biologica et Oecologica; 2005, 2
1730-2366
2083-8484
Pojawia się w:
Acta Universitatis Lodziensis. Folia Biologica et Oecologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The ancestry and cumulative evolution of immune reactions
Autorzy:
Dzik, Jolanta
Powiązania:
https://bibliotekanauki.pl/articles/1040306.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
signal transduction
invertebrates
receptors
cytokines
antigen presentation
nitric oxide
phagocytosis
evolution
innate immunity
complement
antibody-based immunity
superoxide
protoza
vertebrates
sponges
Opis:
The last two decades of study enriched greatly our knowledge of how the immune system originated and the sophisticated immune mechanisms of today's vertebrates and invertebrates developed. Even unicellular organisms possess mechanisms for pathogen destruction and self recognition. The ability to distinguish self from non-self is a prerequisite for recognition of sexual compatibility and ensuring survival. Molecules involved in these processes resemble those found in the phagocytic cells of higher organisms. Recognition of bacteria by scavenger receptors induces phagocytosis or endocytosis. The phagocytic mechanisms characterizing the amoeboid protozoans developed further during the evolution towards innate immunity. The scavenger receptor cysteine-rich domain SRCR is encoded in the genomes from the most primitive sponges to mammals. The immune system of sponges comprises signal transduction molecules which occur in higher metazoans as well. Sponges already possess recognition systems for pathogenic bacteria and fungi, based on membrane receptors (a lipopolysaccharide-interacting protein, a cell surface receptor recognizing β(1 → 3)-d-glucans of fungi). Perforin-like molecules and lysozymes are involved, among others, in defense in sponges. Reactive oxygen and nitrogen species function in the immunity of early metazoan. Genes encoding the family of reactive oxygen-generating NADPH oxidases (Noxes) are found in a variety of protists and plants. The NO synthases of cnidarians, mollusks, and chordates are conserved with respect to the mammalian NOS. The antimicrobial peptides of protozoans, amoebapores, are structural and functional analogs of the natural killer cell peptide, NK-lysin, of vertebrates. An ancestral S-type lectin has been found in sponges. Opsonizing properties of lectins and the ability to agglutinate cells justify their classification as primitive recognition molecules. Invertebrate cytokines are not homologous to those of vertebrate, and their functional convergence was presumably enabled by the general similarity of the lectin-like recognition domain three-dimensional structure. Sponges contain molecules with SCR/CCP domains that show high homology to the mammalian regulators of complement activation (RCA family). A multi-component complement system comprising at least the central molecule of the complement system, C3, Factor B, and MASP developed in the cnidarians and evolved into the multilevel cascade engaged in innate and acquired immunity of vertebrates. The adaptive immune system of mammals is also deeply rooted in the metazoan evolution. Some its precursors have been traced as deep as in sponges, namely, two classes of receptors that comprise Ig-like domains, the receptor tyrosine kinases (RTK), and the non-enzymic sponge adhesion molecules (SAM). The antibody-based immune system defined by the presence of the major histocompatibility complex (MHC), T-cell receptor (TCR), B-cell receptor (BCR) or recombination activating genes (RAGs) is known beginning from jawed fishes. However, genes closely resembling RAG1 and RAG2 have been uncovered in the genome of a see urchin. The ancestry of MHC gene remains unknown. Similarly, no homologue of the protein binding domain (PBD) in MHC molecules has been found in invertebrates. The pathway by which endogenous peptides are degraded for presentation with class I MHC molecules utilizes mechanisms similar to those involved in the normal turnover of intracellular proteins, apparently recruited to work also for the immune system. Several cDNAs coding for lysosomal enzymes, e.g., cathepsin, have been isolated from sponges. All chromosomal duplication events in the MHC region occurred after the origin of the agnathans but before the gnathostomes split from them. The V-domains of the subtype found in the receptors of T and B-cells are known from both agnathans and cephalochordates, although they do not rearrange. The rearrangement mechanism of the lymphocyte V-domains suggests its origin from a common ancestral domain existing before the divergence of the extant gnathostome classes. Activation-induced deaminase (AID) - homologous proteins have been found only in the gnathostomes. It appears thus that the adaptive immunity of vertebrates is a result of stepwise accumulation of small changes in molecules, cells and organs over almost half a billion years.
Źródło:
Acta Biochimica Polonica; 2010, 57, 4; 443-466
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
TGF beta signalling and its role in tumour pathogenesis.
Autorzy:
Kaminska, Bozena
Wesolowska, Aleksandra
Danilkiewicz, Malgorzata
Powiązania:
https://bibliotekanauki.pl/articles/1041410.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
Smad propteins
RNA interference.
TGF beta signal transduction
tumour invasion
cancer therapy
MAP kinases
Opis:
Transforming growth factor beta (TGF-β) is a multifunctional cytokine involved in the regulation of cell proliferation, differentiation and survival/or apoptosis of many cells. Knock-out experiments in mice for the three isoforms of TGF-β have demonstrated their importance in regulating inflammation and tissue repair. TGF-β is implicated in the pathogenesis of human diseases, including tissue fibrosis and carcinogenesis. TGF-β receptors act through multiple intracellular pathways. Upon binding of TGF-β with its receptor, receptor-regulated Smad2/3 proteins become phosphorylated and associate with Smad4. Such complex translocates to the nucleus, binds to DNA and regulates transcription of specific genes. Negative regulation of TGF-β/Smad signalling may occur through the inhibitory Smad6/7. Furthermore, TGF-β-activated kinase-1 (TAK1) is a component of TGF-β signalling and activates stress-activated kinases: p38 through MKK6 or MKK3 and c-Jun N-terminal kinases (JNKs) via MKK4. In the brain TGF-β, normally expressed at the very low level, increases dramatically after injury. Increased mRNA levels of the three TGF-β isoforms correlate with the degree of malignancy of human gliomas. TGF-βs are secreted as latent precursors requiring activation into the mature form. TGF-β may contribute to tumour pathogenesis by direct support of tumour growth and influence on local microenvironment, resulting in immunosuppression, induction of angiogenesis, and modification of the extracellular matrix. TGF-β1,2 may stimulate production of vascular endothelial growth factor (VEGF) as well as plasminogen activator inhibitor (PAI-I), that are involved in vascular remodelling occurring during angiogenesis. Blocking of TGF-β action inhibits tumour viability, migration, metastases in mammary cancer, melanoma and prostate cancer model. Reduction of TGF-β production and activity may be a promising target of therapeutic strategies to control tumour growth.
Źródło:
Acta Biochimica Polonica; 2005, 52, 2; 329-337
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure and functions of plant calcium-dependent protein kinases
Autorzy:
Klimecka, Maria
Muszyńska, Grażyna
Powiązania:
https://bibliotekanauki.pl/articles/1041065.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
signal transduction
stress responses
cross-talk
calcium
plant protein kinases
Opis:
Calcium ions as second messengers play an essential role in many important cellular processes. In plants, transient changes in calcium content in the cytosol (calcium signatures) have been observed during growth, development and under stress conditions. Such diverse functions require many different calcium sensors. One of the largest and most differentiated group of calcium sensors are protein kinases, among them calcium-dependent protein kinases (CDPKs) which were identified only in plants and protists. CDPKs have a regulatory domain which is able to bind calcium ions. For regulation of CDPKs activities not only calcium ions but also specific phospholipids and autophosphorylation are responsible. CDPKs have many different substrates, which reflects the diversity of their functions. Potential protein substrates of CDPK are involved in carbon and nitrogen metabolism, phospholipid synthesis, defense responses, ion and water transport, cytoskeleton organization, transcription and hormone responses. Presently, participation of CDPKs in stress signal transduction pathways (e.g., cold, drought, high salinity, wounding) is intensively studied in many laboratories. An intriguing, but still not fully clarified problem is the cross-talk via CDPKs among different signaling pathways that enables signal integration at different levels and ensure appropriate downstream responses.
Źródło:
Acta Biochimica Polonica; 2007, 54, 2; 219-233
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Steroid signal transduction activated at the cell membrane: from plants to animals.
Autorzy:
Marcinkowska, Ewa
Więdłocha, Antoni
Powiązania:
https://bibliotekanauki.pl/articles/1043743.pdf
Data publikacji:
2002
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
signal transduction pathways
membrane receptors
nuclear receptors
transcription factors
translocation
steroid hormones
Opis:
Steroid hormones in plants and in animals are very important for physiological and developmental regulation. In animals steroid hormones are recognized by nuclear receptors, which transcriptionally regulate specific target genes following binding of the ligand. In addition, numerous rapid effects generated by steroids appear to be mediated by a mechanism not depending on the activation of nuclear receptors. Although the existence of separate membrane receptors was postulated many years ago and hundreds of reports supporting this hypothesis have been published, no animal membrane steroid receptor has been cloned to date. Meanwhile, a plant steroid receptor from Arabidopsis thaliana has been identified and cloned. It is a transmembrane protein which specifically recognizes plant steroids (brassinosteroids) at the cell surface and has a serine/threonine protein kinase activity. It seems that plants have no intracellular steroid receptors, since there are no genes homologous to the family of animal nuclear steroid receptors in the genome of A. thaliana. Since the reason of the rapid responses to steroid hormones in animal cells still remains obscure we show in this article two possible explanations of this phenomenon. Using 1,25-dihydroxyvitamin D3 as an example of animal steroid hormone, we review results of our and of other groups concordant with the hypothesis of membrane steroid receptors. We also review the results of experiments performed with ovarian hormones, that led their authors to the hypothesis explaining rapid steroid actions without distinct membrane steroid receptors. Finally, examples of polypeptide growth factor that similarly to steroids exhibit a dual mode of action, activating not only cell surface receptors, but also intracellular targets, are discussed.
Źródło:
Acta Biochimica Polonica; 2002, 49, 3; 735-745
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Slowing down aging from within: mechanistic aspects of anti-aging hormetic effects of mild heat stress on human cells.
Autorzy:
Rattan, Suresh
Gonzalez-Dosal, Regina
Nielsen, Elise
Kraft, David
Weibel, Jens
Kahns, Søren
Powiązania:
https://bibliotekanauki.pl/articles/1043285.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
aging
signal transduction
anti-aging
longevity
proteasome
heat shock
Opis:
Since aging is primarily the result of a failure of maintenance and repair mechanisms, various approaches are being developed in order to stimulate these pathways and modulate the process of aging. One such approach, termed hormesis, involves challenging cells and organisms by mild stress that often results in anti-aging and life prolonging effects. In a series of experimental studies, we have reported that repeated mild heat stress (RMHS) has anti-aging hormetic effects on growth and various cellular and biochemical characteristics of human skin fibroblasts undergoing aging in vitro. These beneficial effects of repeated challenge include the maintenance of stress protein profile, reduction in the accumulation of oxidatively and glycoxidatively damaged proteins, stimulation of the proteasomal activities for the degradation of abnormal proteins, improved cellular resistance to other stresses, and enhanced levels of cellular antioxidant ability. In order to elucidate the molecular mechanisms of hormetic effects of RMHS, we are now undertaking studies on signal transduction pathways, energy production and utilisation kinetics, and the proteomic analysis of patterns of proteins synthesised and their posttranslational modifications in various types of human cells undergoing cellular aging in vitro. Human applications of hormesis include early intervention and modulation of the aging process to prevent or delay the onset of age-related conditions, such as sarcopenia, Alzheimer's disease, Parkinson's disease, cataracts and osteoporosis.
Źródło:
Acta Biochimica Polonica; 2004, 51, 2; 481-492
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Signal transmission via G protein-coupled receptors in the light of rhodopsin structure determination.
Autorzy:
Ciarkowski, Jerzy
Drabik, Piotr
Giełdoń, Artur
Kaźmierkiewicz, Rajmund
Ślusarz, Rafał
Powiązania:
https://bibliotekanauki.pl/articles/1044085.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
signal transduction
neurohypophyseal receptors
molecular modeling
GPCRs
Opis:
G protein-coupled receptors (GPCRs) transducing diverse external signals to cells via activation of heterotrimeric GTP-binding (G) proteins, estimated to mediate actions of 60% of drugs, had been resistant to structure determination until summer 2000. The first atomic-resolution experimental structure of a GPCR, that of dark (inactive) rhodopsin, thus provides a trustworthy 3D prototype for antagonist-bound forms of this huge family of proteins. In this work, our former theoretical GPCR models are evaluated against the new experimental template. Subsequently, a working hypothesis regarding the signal transduction mechanism by GPCRs is presented.
Źródło:
Acta Biochimica Polonica; 2001, 48, 4; 1203-1207
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sensing thiol oxidation in Arabidopsis thaliana through a YAP1 genetically encoded probe
Autorzy:
Waszczak, C.
Akter, M.
Gevaert, K.
De Jaeger, G.
Messens, J.
Van Breusegem, F.
Powiązania:
https://bibliotekanauki.pl/articles/80234.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
reactive oxygen species
hydrogen peroxide
signalling molecule
plant development
metabolic adaptation
stress condition
redox signal
proteomic identification
sulphenome
cysteine thiol group
Arabidopsis thaliana
protein
signal transduction
oxidative stress
genetically encoding probe
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
S-nitrosylation promotes functional and structural changes in the mitochondrial psPrxII F protein
Autorzy:
Camejo, D.
Lazaro, J.
Romero-Puertas, M.
Lazaro-Payo, A.
Sevilla, F.
Jimenez, A.
Powiązania:
https://bibliotekanauki.pl/articles/80481.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
peroxiredoxin
reactive oxygen species
nitric oxide
signal transduction
post-translational modification
salt stress
functional change
structural change
S-nitrosylation
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Regulation of wound-responsive calcium-dependent protein kinase from maize (ZmCPK11) by phosphatidic acid
Autorzy:
Klimecka, Maria
Szczegielniak, Jadwiga
Godecka, Luiza
Lewandowska-Gnatowska, Elżbieta
Dobrowolska, Grażyna
Muszyńska, Grażyna
Powiązania:
https://bibliotekanauki.pl/articles/1039858.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
Zea mays
calcium-dependent protein kinases
abiotic/wound stress signal transduction
phosphatidic acid
phospholipids
Opis:
In plant cells, phospholipids are not only membrane components but also act as second messengers interacting with various proteins and regulating diverse cellular processes, including stress signal transduction. Here, we report studies on the effects of various phospholipids on the activity and expression of maize wound-responsive calcium-dependent protein kinase (ZmCPK11). Our results revealed that in leaves treated with n-butanol, a potent inhibitor of phosphatidic acid (PA) synthesis catalyzed by phospholipase D, a significant decrease of ZmCPK11 activity was observed, indicating contribution of PA in the kinase activation. Using lipid binding assays, we demonstrate that among various phospholipids only saturated acyl species (16 : 0 and 18 : 0) of phosphatidic acid are able to bind to ZmCPK11. Saturated acyl species of PA are also able to stimulate phosphorylation of exogenous substrates by ZmCPK11 and autophosphorylation of the kinase. The level of ZmCPK11 autophosphorylation is correlated with its enzymatic activity. RT-PCR analysis showed that transcript level of ZmCPK11 in maize leaves increased in response to PA treatment. The influence of PA on the activity and transcript level of ZmCPK11 suggests an involvement of this kinase in a PA-mediated wound signal transduction pathway.
Źródło:
Acta Biochimica Polonica; 2011, 58, 4; 589-595
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recent advances in the role of AMP-activated protein kinase in metabolic reprogramming of metastatic cancer cells: targeting cellular bioenergetics and biosynthetic pathways for anti-tumor treatment
Autorzy:
Tyszka-Czochara, M.
Konieczny, P.
Majka, M.
Powiązania:
https://bibliotekanauki.pl/articles/70060.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Fizjologiczne
Tematy:
tumour progression
metastasis
cancer cell
AMP-activated protein kinase
reactive oxygen species
signal transduction
epithelial-mesenchymal transition
metformin
biosynthetic pathway
antitumour treatment
Źródło:
Journal of Physiology and Pharmacology; 2018, 69, 3
0867-5910
Pojawia się w:
Journal of Physiology and Pharmacology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przeciwciała monoklonalne w regulacji transdukcji sygnału receptora naskórkowego czynnika wzrostu (EGFR) w komórkach nowotworowych
Monoclonal antibodies in regulation of signal transduction of Epidermal Growth Factor Receptor (EGFR) pathway in cancer cells
Autorzy:
Kampa, Rafał Paweł
Sypniewski, Daniel
Bednarek, Ilona
Powiązania:
https://bibliotekanauki.pl/articles/1035845.pdf
Data publikacji:
2018
Wydawca:
Śląski Uniwersytet Medyczny w Katowicach
Tematy:
kancerogeneza
terapia przeciwnowotworowa
transdukcja sygnału
egfr
przeciwciała monoklonalne
carcinogenesis
anticancer therapy
signal transduction
monoclonal antibodies
Opis:
In recent years intensive research has been dedicated to the Epidermal Growth Factor Receptor (EGFR) due to its significant role in the pathogenesis of malignant tumors. In many types of cancers intracellular pathways modulated by EGFR have been identified as crucial factors influencing tumor survival and development. On the other hand, EGFR has also been shown to be a promising molecular target for potential therapeutic agents. Attempts to modify the signal transduction exerted by EGF have been made either by blocking the activity of certain elements of the EGFR pathway or by direct inhibition of the EGF receptor itself. It has also been demonstrated that the use of monoclonal antibodies to block the EGF receptor increases the effectiveness of conventional anticancer agents such as cisplatin. Thus, many anticancer therapies based on inhibitors of the selected components of the EGFR signaling pathway have been established, and many of them apply monoclonal antibodies.
Receptor naskórkowego czynnika wzrostu EGFR (Epidermal Growth Factor Receptor), ze względu na jego ważny udział w patogenezie nowotworów złośliwych, jest obiektem intensywnych badań naukowych ostatnich lat. W wielu typach nowotworów wewnątrzkomórkowe szlaki sygnalizacyjne pobudzane przez EGFR mają wręcz kluczowe znaczenie w ich rozwoju. Z drugiej strony wykazano, iż EGFR może stanowić bardzo obiecujący punkt uchwytu dla czynników terapeutycznych. Podjęto próby modyfikacji transdukcji sygnału przekazywanego przez aktywny EGFR wewnątrz komórek poprzez blokowanie aktywności elementów tego szlaku bądź samego receptora. Wykazano też, że blokowanie receptora EGFR przez przeciwciała monoklonalne podwyższa efektywność stosowanych w terapii kon-wencjonalnych czynników przeciwnowotworowych, np. cisplatyny. Dodatkowo opracowano wiele terapii przeciwno-wotworowych opierając się na zastosowaniu inhibitorów wybranych, kluczowych składowych szlaku sygnalizacyj-nego EGFR, z których wiele bazuje na zastosowaniu przeciwciał monoklonalnych.
Źródło:
Annales Academiae Medicae Silesiensis; 2018, 72; 12-20
1734-025X
Pojawia się w:
Annales Academiae Medicae Silesiensis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Protein phosphatase 2A: Variety of forms and diversity of functions
Autorzy:
Lechward, Katarzyna
Awotunde, Olubunmi
Świątek, Wojciech
Muszyńska, Grażyna
Powiązania:
https://bibliotekanauki.pl/articles/1044037.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
protein phosphatase 2A
signal transduction
protein-protein interactions
reversible phosphorylation
cell cycle
carcinogenesis.
Opis:
Protein phosphatase 2A (PP2A) comprises a diverse family of phosphoserine-and phosphothreonine-specific phosphatases present in all eukaryotic cells. All forms of PP2A contain a catalytic subunit (PP2Ac) which forms a stable complex with the structural subunit PR65/A. The heterodimer PP2Ac-PR65/A associates with regulatory proteins, termed variable subunits, in order to form trimeric holoenzymes attributed with distinct substrate specificity and targeted to different subcellular compartments. PP2Ac activity can be modulated by reversible phosphorylation on Tyr307 and methylation on C-terminal Leu309. Studies on PP2A have shown that this enzyme may be implicated in the regulation of metabolism, transcription, RNA splicing, translation, differentiation, cell cycle, oncogenic transformation and signal transduction.
Źródło:
Acta Biochimica Polonica; 2001, 48, 4; 921-933
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł

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