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    Wyświetlanie 1-7 z 7
    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:
    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:
    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:
    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:
    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:
    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:
    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
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