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    Wyświetlanie 1-14 z 14
    Tytuł:
    Crosstalk between the TGF-β and WNT signalling pathways during cardiac fibrogenesis
    Autorzy:
    Działo, Edyta
    Tkacz, Karolina
    Błyszczuk, Przemysław
    Powiązania:
    https://bibliotekanauki.pl/articles/1038355.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    TGF-beta
    Smad
    WNT
    beta-catenin
    RhoA-ROCK
    p38
    JNK
    Erk1/2
    MAPK
    cardiac fibrosis
    tissue remodelling
    cardiac fibroblasts
    heart
    Opis:
    Cardiac fibrosis is referred to as an excessive accumulation of stromal cells and extracellular matrix proteins in the myocardium. Progressive fibrosis causes stiffening of the cardiac tissue and affects conduction of electrical impulses, leading to heart failures in a broad range of cardiac conditions. At the cellular level, activation of the cardiac stromal cells and myofibroblast formation are considered as hallmarks of fibrogenesis. At the molecular level, transforming growth factor β (TGF-β) is traditionally considered as a master regulator of the profibrotic processes. More recently, the WNT signalling pathway has also been found to be implicated in the development of myocardial fibrosis. In this review, we summarize current knowledge on the involvement of TGF-β and WNT downstream molecular pathways to cardiac fibrogenesis and describe a crosstalk between these two profibrotic pathways. TGF-β and WNT ligands bind to different receptors and trigger various outputs. However, a growing body of evidence points to cross-regulation between these two pathways. It has been recognized that in cardiac pathologies TGF-β activates WNT/β-catenin signalling, which in turn stabilizes the TGF-β/Smad response. Furthermore both, the non-canonical TGF-β and non-canonical WNT signalling pathways, activate the same mitogen-activated protein kinases (MAPKs): the extracellular signal-regulated kinase (Erk), the c-Jun N-terminal kinases (JNKs) and p38. The crosstalk between TGF-β and WNT pathways seems to play an essential role in switching on the genetic machinery initiating profibrotic changes in the heart. Better understanding of these mechanisms will open new opportunities for development of targeted therapeutic approaches against cardiac fibrosis in the future.
    Źródło:
    Acta Biochimica Polonica; 2018, 65, 3; 341-349
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ terapii fotodynamicznej na ekspresję TGF-β1, TβR-I, TβR-II i TβR-III w hodowlach czerniaka
    The influence of photodynamic therapy on TGF-β1, TβR-I, TβR-II and TβR-III expression in melanoma cell cultures
    Autorzy:
    Latocha, Małgorzata
    Kuśmierz, Dariusz
    Rybarz, Monika
    Powiązania:
    https://bibliotekanauki.pl/articles/1034904.pdf
    Data publikacji:
    2013
    Wydawca:
    Śląski Uniwersytet Medyczny w Katowicach
    Tematy:
    pdt-fotolon
    tgf-β1
    receptory tgf-β
    czerniak
    pdt-photolon
    tgf-β receptors
    melanoma
    Opis:
    INTRODUCTION In the early stages of cancerogenesis, TGF-β strongly inhibits the proliferation of epithelial cells and is described as a tumor suppressor. However, in further stages of this process, TGF-β can even promote the formation of a neoplasm. It can influence the tumor invasiveness and the ability of cancer to infiltrate the area of surrounding normal tissue. Stimulating proangiogenic factors such as IL-8 and VEGF can also contribute to angiogenesis in the tumor periphery. An elevated level of TGF-β strongly modifies the immune response of the organism through inhibiting the proliferation of T-cells and limiting the possibility of antigen presentation by specialized cells. Aim of the study. The aim of the study was to evaluate the expression of genes encoding TGF-β1 and its receptors: type I, II and III in melanoma cell culture after photodynamic therapy with Photolon in vitro. MATERIAL AND METHODS The study was conducted in three melanoma cell lines: C-32, Colo-892 and SH-4 (ATCC). The expression of genes encoding TGF-β1 and its receptors was estimated at the transcript stage (mRNA). RESULTS All of the photodynamic therapy parameters applied in the study resulted in a significant reduction of TGF-β1 and its receptors mRNA copy numbers per μg of the total RNA. CONCLUSIONS According to the data connected with the role of TGF-β in expressing a more malignant character in cancer cells, decreasing the TGF-β1 mRNA copy numbers after photodynamic therapy may be advantageous for the therapeutic process.
    WSTĘP W początkowym stadium kancerogenezy transformujący czynnik wzrostu β (transforming growth factor β – TGF-β) silnie hamuje proliferację komórek nabłonkowych i określany jest mianem supresora nowotworów. Jednak w późniejszych etapach tego procesu, czynnik ten może promować rozwój nowotworu: wpływać na jego inwazyjność oraz zdolność do naciekania prawidłowych tkanek. Przez stymulację czynników proangiogennych, takich jak IL-8 i VEGF, może także przyczyniać się do angiogenezy na obwodzie guza. Podwyższony poziom TGF-β silnie modyfikuje odpowiedź immunologiczną organizmu – hamuje proliferację limfocytów T oraz ogranicza możliwości prezentacji antygenów przez wyspecjalizowane komórki. Celem pracy była ocena ekspresji genów kodujących: TGF-β1 oraz jego receptory I, II i III w hodowlach komórek czerniaka, które poddano, w warunkach in vitro, terapii fotodynamicznej z Fotolonem. MATERIAŁ I METODY W badaniach wykorzystano trzy linie czerniaka: C-32, Colo-892 i SH-4 (ATCC). Ekspresję genów kodujących TGF-β1 i jego receptory oceniano na etapie transkryptów (mRNA). WYNIKI Zastosowanie przyjętych w pracy warunków terapii fotodynamicznej w przypadku wszystkich badanych linii czerniaka skutkuje znaczącą redukcją liczby kopii mRNA TGF-β1 i jego receptorów w przeliczeniu na μg RNA całkowitego. WNIOSKI W świetle informacji dotyczącej roli TGF-β w nabywaniu złośliwego charakteru komórek nowotworowych zmniejszenie liczby kopii mRNA TGF-β1 po przeprowadzeniu terapii fotodynamicznej może być korzystne dla przebiegu procesu terapeutycznego.
    Źródło:
    Annales Academiae Medicae Silesiensis; 2013, 67, 4; 238-248
    1734-025X
    Pojawia się w:
    Annales Academiae Medicae Silesiensis
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Angiogenic cytokines VEGF, TGF-β1, IL-8 and TNF secretion by human ovarian cancer cells
    Wydzielanie angiogennych cytokin VEGF, TGF-β1, IL-8 iTNF przez ludzkie komórki nowotworów jajnika
    Autorzy:
    Sienko, Jacek
    Grabowska-Derlatka, Laretta
    Czajkowski, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/1029705.pdf
    Data publikacji:
    2017
    Wydawca:
    Medical Communications
    Tematy:
    IL-8
    TGF-β
    TNF
    VEGF
    cell line
    ovarian cancer
    Opis:
    Objectives: Angiogenesis is a process that is indispensable in cancer progression. A complex network of tumor and microenvironment stimuli regulate angiogenesis. VEGF, TGF-β1, IL-8 and TNF belong to the angiogenic factors that are key points in vessel formation. The aim of the study was to assess h-VEGF, TGF-β1, IL-8 and TNF secretion by human ovarian cell lines. Material and methods: OVA 2, OVA 4, OVA 9, OVA 11 and OVA 14 cell lines were established in our laboratory. The cells derived from primary and metastatic tumors of epithelial and non-epithelial origin. SK-OV-3, MDAH 2774, CAOV-1 and OVP-10 were the cell lines obtained from other sources. The concentration of VEGF, TGF-β1 and IL-8 was determined in culture supernatants by using the ELISA tests. Results: OVA 11 secreted all the evaluated cytokines. MDAH 2774 was the source of h-VEGF, TGF-β1, IL-8. SK-OV-3 secreted h-VEGF and IL-8. OVA 4 secreted TGF-β1 and TNF. TNF was the only studied cytokine secreted by CAOV-1, OVA 2 and OVA 9 cell lines. OVA 14 did not secret any of the cytokines. Conclusions: The investigated cell lines present heterogeneous profile of angiogenic cytokine secretion and seem to be an interesting set of models for the study of angiogenic signaling, or target therapy.
    Cel: Angiogeneza jest procesem niezbędnym do progresji raka. Złożona sieć bodźców pochodzących od guza i z mikrośrodowiska reguluje angiogenezę. VEGF, TGF-β1, IL-8 i TNF należą do czynników angiogennych, które odgrywają kluczową rolę w tworzeniu naczyń. Celem pracy była ocena wydzielania h-VEGF, TGF-β1, IL-8 i TNF przez ludzkie linie raka jajnika. Materiał i metoda: Linie OVA 2, OVA 4, OVA 9, OVA 11 oraz OVA 14 zostały ustalone samodzielnie. Komórki pochodziły z pierwotnych lub przerzutowych guzów jajnika pochodzenia nabłonkowego lub nienabłonkowego. Linie SK-OV-3, MDAH 2774, CAOV-1 oraz OVP-10 pochodziły z innych źródeł. Stężenie VEGF, TGF-β1 i IL-8 określano w supernatantach hodowli komórkowych w teście ELISA. Wyniki: Linia OVA 11 wydzielała wszystkie badane cytokiny. Linia MDAH 2774 była źródłem h-VEGF, TGF-β1, IL-8. Linia SK-OV-3 wydzielała h-VEGF oraz IL-8. Linia OVA 4 wydzielała TGF-β1 i TNF. TNF był jedyną cytokiną wydzielaną przez linie CAOV-1, OVA 2 oraz OVA 9. Linia OVA 14 nie wydzielała żadnej spośród badanych cytokin. Wnioski: Badane linie komórkowe stanowią heterogenną grupę nowotworów wydzielających cytokiny o właściwościach angiogennych i wydają się interesującym panelem do badań nad procesami angiogenezy czy terapii celowanej.
    Źródło:
    Current Gynecologic Oncology; 2017, 15, 2; 99-104
    2451-0750
    Pojawia się w:
    Current Gynecologic Oncology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    TGF-β1, IL-10 and IL-4 in colostrum of allergic and nonallergic mothers
    Autorzy:
    Marek, Andrzej
    Zagierski, Maciej
    Liberek, Anna
    Aleksandrowicz, Ewa
    Korzon, Michał
    Krzykowski, Grzegorz
    Kamińska, Barbara
    Szlagatys-Sidorkiewicz, Agnieszka
    Powiązania:
    https://bibliotekanauki.pl/articles/1040529.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    IL-10
    allergy
    IL-4
    human milk
    TGF-β1
    Opis:
    Objective: To determine transforming growth factor (TGF) β1, interleukin (IL) 4, and IL-10 concentrations in human milk and to assess the relationship between allergic disorders in mothers and the content of the interleukins in their milk. Material and methods: Thirty allergic and 46 healthy mothers were included in the study. Colostrum was collected 2-3 days after delivery. Cytokine concentrations were determined with commercial enzyme-linked immunosorbent systems. Results: TGF-β1was found in milk from 23 women in the control group (53.49%) and 11 in the allergy group (37.93%). When TGF-β1 was present, the median concentration was higher in the allergy group than in the control (61.5 and 30.4 pg/mL, respectively; P < 0.004). IL-10 was present in the colostrum of all the women and the median IL-10 concentration did not differ between the allergy (50.5 pg/mL) and control (51.5 pg/mL) groups. The probability of occurrence of a positive IL-4 value in the allergy group was greater than in the control group (chi-squared [df=1] = 2.60, P < 0.053). Median IL-4 level did not differ significantly between the two groups (0.5 and 0.5 pg/mL respectively). Conclusions: TGF-β1 was detected less often in the colostrum of allergic mothers than in that of mothers without allergy (but the difference was not statistically significant). IL-4 was found more often in the colostrum of allergic mothers than nonallergic ones. The allergy status did not correlate with IL-10 concentration.
    Źródło:
    Acta Biochimica Polonica; 2009, 56, 3; 411-414
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of the frequency of the transforming growth factor beta-1 sequence polymorphisms in patients with alcohol dependence syndrome
    Autorzy:
    Augustyńska, Beata
    Araszkiewicz, Aleksander
    Woźniak, Marcin
    Grzybowski, Tomasz
    Skonieczna, Katarzyna
    Woźniak, Alina
    Żyła, Magdalena
    Powiązania:
    https://bibliotekanauki.pl/articles/1039134.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    transforming growth factor TGFβ-1
    alcohol dependence syndrome
    TGF-β1 gene
    Opis:
    Alcohol abuse is one of the most significant factors in the development of liver fibrosis. The pathomechanism of liver fibrosis is the same regardless of its etiology. Fibrosis is a sign of an imbalance between the synthesis of the extracellular matrix components and their degradation. Among the many cytokines that affect hepatic stellate cell activation it seems that transforming growth factor beta (TGF-β) is the most significant, either as the direct factor stimulating polymerase chain reaction (HSC) proliferation and transformation into myofibroblasts, or as the direct factor causing an increase in the activity of genes responsible for the synthesis of extracellular matrix components. The aim of the study was to reveal possible dependencies and differences between the presence of certain alleles of the TGF-β1 gene and its blood level in the study and control group. Blood samples were obtained from 39 patients, the control group consisted of 21 patients. The results obtained in the course of this study showed no statistically significant differences between the frequencies of particular polymorphisms. In the case of haplotype frequencies, insignificant differences were found for the algorithm Excoffier-Laval-Balding predicted haplotypes while one significant difference between the study and control groups was detected in case of the TC haplotype frequency predicted using the Expectation-Maximization algorithm. However, the difference in frequency of TC haplotype predicted by both algorithms was not significant. Genetic analysis of two single nucleotide polymorphisms (SNPs) in exon I of the TGF-β1 gene did not show significant differences between the occurrence of particular polymorphisms and haplotypes in the populations under study.
    Źródło:
    Acta Biochimica Polonica; 2015, 62, 1; 63-67
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Expression of soluble recombinant TGF-β type II receptor fused with the Fc portion of human IgG1 (sTβRII-Fc) in NS0 cells
    Autorzy:
    Kwiatkowska, Eliza
    Kazimierczak, Urszula
    Mackiewicz, Andrzej
    Kowalczyk, Dariusz
    Powiązania:
    https://bibliotekanauki.pl/articles/1041250.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    GS-NS0 expression system
    chimeric receptor
    TGF-β
    TGF-βreceptor
    TGF antagonist
    Opis:
    We have constructed and expressed recombinant chimeric soluble TGF-β type II receptor fused with the Fc portion of human IgG1 (sTβRII-Fc) in NS0 mouse myeloma cells and isolated cell lines constitutively secreting very high levels of biologically active protein. The GS-NS0 expression system takes advantage of the strong human cytomegalovirus immediate early promoter expression vector and glutamine synthetase as a selectable marker. The recombinant chimeric receptor could be produced in high amounts and efficiently purified by one step chromatography on a protein A column. Biochemical studies revealed that recombinant sTβRII-Fc binds native TGF-β1 and TGF-β3 isoforms and neutralizes their activity in vitro.
    Źródło:
    Acta Biochimica Polonica; 2006, 53, 2; 361-369
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Inhibition of CYP17 expression by adrenal androgens and transforming growth factor β in adrenocortical cells.
    Autorzy:
    Biernacka-Łukanty, Justyna
    Lehmann, Tomasz
    Trzeciak, Wiesław
    Powiązania:
    https://bibliotekanauki.pl/articles/1041500.pdf
    Data publikacji:
    2004
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    CYP17
    adrenocortical cells
    TGF-β
    androgens
    expression
    Opis:
    Cytochrome P450c17, encoded by the CYP17 gene, is a component of the 17a-hydroxylase/17,20-lyase enzyme complex essential for production of adrenal glucocorticoids and androgens as well as gonadal androgens. The expression of CYP17 in adrenocortical cells is stimulated by corticotropin (ACTH) via the signal transduction pathway involving cAMP and protein kinase A (PKA). Thus, in addition to glucocorticoids, ACTH stimulates formation of adrenal androgens, which are known to induce transforming growth factor β (TGF-β) secretion. TGF-β in turn inhibits steroid hormone output by attenuating both basal and ACTH-dependent expression of CYP17. The present study revealed that treatment of bovine and human H295R adrenocortical cells with androgens resulted in a decrease in the basal level of CYP17 transcript and cortisol secretion, without affecting forskolin-stimulated levels. We also demonstrated that in H295R cells TGF-β inhibited both basal and forskolin-stimulated accumulation of CYP17 mRNA. Determination of promoter activity, directing luciferase reporter gene expression in H295R cells transfected with deletion fragments of bovine CYP17 promoter, indicated that the -483 to -433 bp fragment of the promoter was necessary for the inhibitory action of TGF-β on CYP17 expression. It is concluded that in bovine and human adrenocortical cells, androgens inhibit basal CYP17 expression probably at the transcriptional level and independently of the effect of TGF-β.
    Źródło:
    Acta Biochimica Polonica; 2004, 51, 4; 907-917
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Peripheral regulatory T cells and anti-inflammatory cytokines in children with juvenile idiopathic arthritis
    Autorzy:
    Sznurkowska, Katarzyna
    Boćkowska, Małgorzata
    Zieliński, Maciej
    Plata-Nazar, Katarzyna
    Trzonkowski, Piotr
    Liberek, Anna
    Kamińska, Barbara
    Szlagatys-Sidorkiewicz, Agnieszka
    Powiązania:
    https://bibliotekanauki.pl/articles/1038532.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    Tregs
    IL-10
    TGF-β1
    juvenile idiopathic arthritis
    Opis:
    Background: Juvenile idiopathic arthritis (JIA) is a chronic, heterogenous inflammatory disease of unclear pathogenesis. JIA is hypothesized to be linked to a defective immune regulation. Anti-inflammatory cytokines belong to the best known regulatory factors. T-regulatory cells are a crucial cellular component of immune tolerance. One of their functions is synthesis of interleukin 10 (IL-10) and transforming growth factor beta1 (TGF-β1). The aim of this study was to determine the proportion of T-regulatory cells (CD4+CD25highFOXP3+) in peripheral blood, and serum levels of TGF-β1 and IL-10 in patients with JIA. Methods: The study included 25 patients with newly diagnosed JIA: oligoarthritis (n=17) and polyarthritis (n=8). The control group was comprised of 17 healthy children. CD4+CD25highFOXP3+ T cells in peripheral blood were quantified by means of three-color flow cytometry. Serum concentrations of TGF-β1 and IL-10 were estimated with ELISA. Results: The proportion of peripheral CD4+CD25highFOXP3+ cells in patients with JIA was significantly higher than in the controls (p=0.04). The two groups did not differ significantly in terms of their TGF-β1 and IL-10 concentrations. Conclusions: At the time of diagnosis, children with JIA presented with an elevated proportion of T-regulatory cells (CD4+CD25highFOXP3+) in peripheral blood. Anti-inflammatory cytokines, IL-10 and TGF-β1, are not upregulated in the serum of patients with JIA, and therefore should not be considered as biomarkers of this condition.
    Źródło:
    Acta Biochimica Polonica; 2018, 65, 1; 119-123
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zaburzenia kaskady transformujących czynnikow wzrostu typu β w wybranych patologiach człowieka
    Aberrations in the signalling cascade of transforming growth factor β type in selected human pathologies
    Autorzy:
    Zakrzewski, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/1032754.pdf
    Data publikacji:
    2012
    Wydawca:
    Łódzkie Towarzystwo Naukowe
    Tematy:
    transformujące czynniki wzrostu typu β - tgfβ
    sygnalizacja
    komórkowa
    patofizjologia
    polimorfizm
    mutacje
    transforming growth factor β type - tgfβ
    cellular signalling
    pathophysiology
    polymorphism
    mutations
    Opis:
    A transforming growth factor β type (TGFβ) cascade is a multifactorial signalling pathway, which controls the plethora of cellular processes responsible for human organism homeostasis. The importance of alterations of TGFβ-induced signalling remains unknown. Up till now, impaired TGFβ signalling has been observed in pathologies of the musculoskeletal, cardiovascular and reproductive systems. Abnormalities in the TGFβ pathway can be either genetically determined or appear as spontaneous disorders which emerged during embryonic development. Understanding the role of the TGFβ pathway in the aetiology of various diseases appears to be necessary as it may serve in developing new strategies for therapeutic or diagnostic methods.
    Kaskada sygnalizacyjna transformujących czynników wzrostu typu β (TGFβ) stanowi indukowany przez wiele cytokin szlak przekazywania sygnału w komórce, pod kontrolą którego znajduje się szereg procesów komórkowych odpowiedzialnych za prawidłowe funkcjonowanie ludzkiego organizmu. Znaczenie zaburzeń sygnalizacji indukowanej czynnikami TGFβ pozostaje nadal nie do końca poznane. Niemniej jednak już na obecnym etapie badań stwierdzić można ich bezsprzeczny udział w patologiach układu kostno-mięśniowego, układu krwionośnego czy układu rozrodczego.
    Źródło:
    Folia Medica Lodziensia; 2012, 39, 2; 265-292
    0071-6731
    Pojawia się w:
    Folia Medica Lodziensia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Immediate and Delayed Surgical Repair of Duodenal Defects in Rats with Small Intestinal Submucosa Patch
    Autorzy:
    Miliaras, Dimosthenis
    Miliaras, Spyridon
    Meditskou, Soultana
    Papamitsou, Theodora
    Powiązania:
    https://bibliotekanauki.pl/articles/1395733.pdf
    Data publikacji:
    2014-03-01
    Wydawca:
    Index Copernicus International
    Tematy:
    duodenal defect
    healing
    immunohistochemistry
    regeneration
    small intestinal submucosa
    TGF-β
    Opis:
    Duodenal injuries, though rare, carry high rates of morbidity and mortality. The aim of the study was to evaluate the healing of the duodenal wall with the use of a Small Intestinal Submucosa (SIS) patch. Material and methods. We studied 40 Whistar-Albino rats divided into two groups. In group A, we created a small defect in the duodenal wall, which was immediately covered with a SIS patch. In group B, the SIS patch was sutured over the defect after 6-8 hours, in order to induce peritonitis. The animals of both groups were sacrificed after 2, 6, 12 and 16 weeks respectively. In addition, we studied the immunohistochemical expression of TGF-β, which is a major constituent of SIS, and plays a central role in the healing process. Results. Histology showed progressive development of the layers of the duodenal wall over the patch as early as the 2nd week in some of the animals of group A. Mucosa developed later on in the animals of group B, presumably due to the more intense inflammation elicited by peritonitis. Expression of TGF-β was initially more pronounced in the epithelial cells of the regenerating mucosa of animals of group A, but it was maintained in higher levels in the animals of group B, which showed delayed mucosa degeneration. Conclusions. SIS appears to be both efficient and safe for the management of duodenal trauma. TGF-β seems to play an important role in the healing process, inducing regeneration of the stroma, and controling epithelial growth.
    Źródło:
    Polish Journal of Surgery; 2014, 86, 3; 116-121
    0032-373X
    2299-2847
    Pojawia się w:
    Polish Journal of Surgery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Can transforming growth factor-β1 and retinoids modify the activity of estradiol and antiestrogens in MCF-7 breast cancer cells?
    Autorzy:
    Czeczuga-Semeniuk, Ewa
    Anchim, Tomasz
    Dzięcioł, Janusz
    Dąbrowska, Milena
    Wołczyński, Sławomir
    Powiązania:
    https://bibliotekanauki.pl/articles/1041552.pdf
    Data publikacji:
    2004
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    estradiol
    apoptotic index
    tamoxifen
    TGF-β1
    proliferation
    MCF-7
    retinoids
    Opis:
    Retinoic acid and transforming growth factor-β (TGF-β) affect differentiation, proliferation and carcinogenesis of epithelial cells. The effect of both compounds on the proliferation of cells of the hormone sensitive human breast cancer cell line (ER+) MCF-7 was assessed in the presence of estradiol and tamoxifen. The assay was based on [3H]thymidine incorporation and the proliferative activity of PCNA- and Ki 67-positive cells. The apoptotic index and expression of the Bcl-2 and p53 antigens in MCF-7 cells were also determined. Exogenous TGF-β1 added to the cell culture showed antiproliferative activity within the concentration range of 0.003-30 ng/ml. Irrespective of TGF-β1 concentrations, a marked reduction in the stimulatory action of estradiol (10-9 and 10-8 M) was observed whereas in combination with tamoxifen (10-7 and 10-6 M) only 30 ng/ml TGF-β1 caused a statistically significant reduction to aproximately 30% of the proliferative cells. In further experiments we examined the effect of exposure of breast cancer cells to retinoids in combination with TGF-β1. The incorporation of [3H]thymidine into MCF-7 cells was inhibited to 52 ± 19% (control =100%) by 3 ng/ml TGF-β1, and this dose was used throughout. It was found that addition of TGF-β1 and isotretinoin to the culture did not decrease proliferation, while TGF-β1 and tretinoin at low concentrations (3 × 10-8 and 3 × 10-7 M) reduced the percentage of proliferating cells by aproximately 30% (67±8% and 67±5%, P <0.05 compared to values in the tretinoin group). Both retinoids also led to a statistically significant decrease in the stimulatory effect of 10-9 M estradiol, attenuated by TGF-β1. In addition, the retinoids in combination with TGF-β1 and tamoxifen (10-6 M) caused a further reduction in the percentage of proliferating cells. Immunocytochemical analysis showed that all the examined compounds gave a statistically significant reduction in the percentage of cells with a positive reaction to PCNA and Ki 67 antigen. TGF-β1, isotretinoin and tretinoin added to the culture resulted in the lowest percentage of PCNA positive cells. However, the lowest fraction of Ki 67 positive cells was observed after addition of isotretinoin. The obtained results also confirm the fact that the well-known regulatory proteins Bcl-2 and p53 play an important role in the regulation of apoptosis in the MCF-7 cell line, with lowered Bcl-2 expression accompanying easier apoptotic induction. The majority of the examined compounds act via the p53 pathway although some bypass this important proapoptotic factor.
    Źródło:
    Acta Biochimica Polonica; 2004, 51, 3; 733-745
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Extremely low-frequency electromagnetic field (ELF-EMF) induced alterations in gene expression and cytokine secretion in clear cell renal carcinoma cells
    Autorzy:
    Cios, Aleksandra
    Ciepielak, Martyna
    Lieto, Krystyna
    Matak, Damian
    Lewicki, Sławomir
    Palusińska, Małgorzata
    Stankiewicz, Wanda
    Szymański, Łukasz
    Powiązania:
    https://bibliotekanauki.pl/articles/31340344.pdf
    Data publikacji:
    2024-05-21
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    electromagnetic field
    renal carcinoma
    ADAM28
    VEGFC
    NCAM1
    TGF-β1
    Opis:
    Background The study aimed to investigate the influence of extremely low-frequency electromagnetic fields (ELF-EMF) on clear cell renal cell carcinoma (ccRCC) by assessing alterations in gene expression and the secretion of cytokines and chemokines. Material and Methods Three ccRCC cell lines (786-O, 769-P, and CAKI-1) and a healthy HEK293 cell line were subjected to ELF-EMF exposure (frequency 50 Hz, magnetic field strength 4.5 mT) for 30 min daily for 5 days. The study examined the expression of ADAM28, NCAM1, and VEGFC genes, along with the secretion of 30 cytokines and chemokines. Results Notably, primary tumor-derived cell lines, but not those from metastatic sites, exhibited ADAM28 gene expression, which increased following ELF-EMF exposure. A statistically significant reduction in VEGFC gene expression was observed in 769-P cells after ELF-EMF exposure. Additionally, NCAM1 gene expression was upregulated in HEK293, 769-P, and 786-O cells, representing normal embryonic kidney cells and primary tumor cells, but not in CAKI-1 cells, which model metastatic sites. After EMF exposure, there was a statistically significant decrease in transforming growth factor β1 (TGF-β1) concentration in the cell culture supernatants of HEK293 and CAKI-1 cell lines, with no other significant changes in the secretion of tested cytokines. Conclusions Given the study’s findings and available research, caution is warranted when drawing conclusions about the potential inhibitory effect of ELF-EMF on ccRCC progression. Standardization of experimental models is imperative when assessing the effects of EMF in a human context.
    Źródło:
    Medycyna Pracy. Workers’ Health and Safety; 2024, 75, 2; 133-141
    0465-5893
    2353-1339
    Pojawia się w:
    Medycyna Pracy. Workers’ Health and Safety
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transforming growth factor β1 protein and mRNA levels in inflammatory bowel diseases: towards solving the contradictions by longitudinal assessment of the protein and mRNA amounts
    Autorzy:
    Liberek, Anna
    Kmieć, Zbigniew
    Wierzbicki, Piotr
    Jakóbkiewicz-Banecka, Joanna
    Liberek, Tomasz
    Łuczak, Grażyna
    Plata-Nazar, Katarzyna
    Słomińska-Frączek, Magdalena
    Kaszubowska, Lucyna
    Gabig-Cimińska, Magdalena
    Węgrzyn, Alicja
    Powiązania:
    https://bibliotekanauki.pl/articles/1039466.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    Crohn's disease
    ulcerative colitis
    Transforming Growth Factor-β1
    longitudinal assessment of TGF-β1 level
    Opis:
    Previously published studies on levels of the transforming growth factor-β1 (TGF-β1) protein and mRNA of the corresponding gene in patients suffering from inflammatory bowel diseases (IBD) gave varying results, leading to contradictory conclusions. To solve the contradictions, we aimed to assess longitudinally TGF-β1 protein and mRNA levels at different stages of the disease in children suffering from IBD. The study group consisted of 19 pediatric patients with IBD at the age between 3.5 and 18.4 years. The control group consisted of 42 children aged between 2.0 and 18.0 years. The plasma TGF-β1 concentration was measured with ELISA. mRNA levels of the TGF-β1 gene isolated from samples of the intestinal tissue were assessed by reverse transcription and real-time PCR. Levels of TGF-β1 protein in plasma and corresponding mRNA in intestinal tissue were significantly higher in IBD patients than in controls. TGF-β1 and corresponding transcripts were also more abundant in plasma and intestinal tissue, respectively, in patients at the active stage of the disease than during remission. In every single IBD patient, plasma TGF-β1 level and mRNA level in intestinal tissue was higher at the active stage of the disease than during remission. Levels of TGF-β1 and corresponding mRNA are elevated during the active stage of IBD but not during the remission. Longitudinal assessment of this cytokine in a single patient may help to monitor the clinical course of IBD.
    Źródło:
    Acta Biochimica Polonica; 2013, 60, 4; 683-688
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Expression of anti-inflammatory markers IL-2, IL-10, TGF-β1, βDEF-2, βDEF-3 and Cathelicidin LL37 in dairy cattle milk with different health status of the udder
    Autorzy:
    Šerstņova, K.
    Pilmane, M.
    Vitenberga-Verza, Z.
    Melderis, I.
    Gontar, Ł.
    Kochański, M.
    Drutowska, A.
    Maróti, G.
    Prieto-Simón, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/16539162.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    cytokines
    interleukins
    mastitis
    bovine milk
    Opis:
    Great economic losses to the dairy industry are associated with bovine mastitis, which results in poor milk quality and high treatment costs. Anti-inflammatory proteins play an important role in the suppression of the immune response against invading pathogenic microorganisms and are therefore being studied for possible use in the early diagnosis of mastitis. In our study, we used milk samples from 15 cows of Holstein Friesian breed with different health status (5 healthy, 5 subclinical, and 5 clinical animals), and tested them using immunohistochemical (IHC) analysis to evaluate the presence of IL-2, IL-10, TGF-β1, βDEF-2, DEF-3, and Cathelicidin LL37 proteins. The calculation of positively and negatively stained cells for each biomarker was performed using the semiquantitative counting method. We found the presence of all factors with the exception of Cathelicidin LL37, which was almost absent in milk samples of all animal groups. The significant decrease of IL-10, β-def2, and β-def3 expression levels within the 3 days of sampling, found in the milk of animals with sub- and clinical mastitis, indicates the loss of antiinflammatory protection of the affected cow’s udder. In contrast, the stable increase of IL-2 and TGF-β1 positive cells observed in the milk of mastitis-affected cows, and the similar expression of these factors in the milk of healthy animals, indicate the possible lack of involvement of these cytokines at an early stage of udder inflammation.
    Źródło:
    Polish Journal of Veterinary Sciences; 2022, 25, 2; 237-248
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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