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Wyświetlanie 1-5 z 5
Tytuł:
Prospects for p53-based cancer therapy.
Autorzy:
Stokłsa, Tomasz
Gołąb, Jakub
Powiązania:
https://bibliotekanauki.pl/articles/1041406.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
missense mutations
cancer
p53
stress response
small molecule inhibitors
tumor suppressor
Opis:
The p53 tumor suppressor plays the role of a cellular hub which gathers stress signals such as damage to DNA or hypoxia and translates them into a complex response. p53 exerts its action mainly as a potent transcription factor. The two major outcomes of p53 activity are highlighted: cell cycle arrest and apoptosis. During malignant transformation p53 or p53-pathway related molecules are disabled extremely often. Mutations in p53 gene are present in every second human tumor. A mutant form of p53 may not only negate the wild type p53 function but may play additional role in tumor progression. Therefore p53 represents a relatively unique and specific target for anticancer drug design. Current approaches include several different molecules able to restore p53 wild-type conformation and activity. Such small molecule drugs hold great promise in treating human tumors with dysfunction of p53 pathway in the near future.
Źródło:
Acta Biochimica Polonica; 2005, 52, 2; 321-328
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Direct tumor damage mechanisms of photodynamic therapy.
Autorzy:
Nowis, Dominika
Makowski, Marcin
Stokłosa, Tomasz
Legat, Magdalena
Issat, Tadeusz
Gołąb, Jakub
Powiązania:
https://bibliotekanauki.pl/articles/1041411.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
photosensitizer
tumor
photodynamic therapy
apoptosis
Opis:
Photodynamic therapy (PDT) is a clinically approved and rapidly developing cancer treatment regimen. It is a minimally invasive two-stage procedure that requires administration of a photosensitizing agent followed by illumination of the tumor with visible light usually generated by laser sources. A third component of PDT is molecular oxygen which is required for the most effective antitumor effects. In the presence of the latter, light of an appropriate wavelength excites the photosensitizer thereby producing cytotoxic intermediates that damage cellular structures. PDT has been approved in many countries for the treatment of lung, esophageal, bladder, skin and head and neck cancers. The antitumor effects of this treatment result from the combination of direct tumor cell photodamage, destruction of tumor vasculature and activation of an immune response. The mechanisms of the direct photodamage of tumor cells, the signaling pathways that lead to apoptosis or survival of sublethaly damaged cells, and potential novel strategies of improving the antitumor efficacy of PDT are discussed.
Źródło:
Acta Biochimica Polonica; 2005, 52, 2; 339-352
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pioglitazone, a PPAR-gamma ligand, exerts cytostatic/cytotoxic effects against cancer cells, that do not result from inhibition of proteasome
Autorzy:
Mrówka, Piotr
Głodkowska, Eliza
Młynarczuk-Biały, Izabela
Biały, Łukasz
Kuckelkorn, Ulrike
Nowis, Dominika
Makowski, Marcin
Legat, Magdalena
Gołąb, Jakub
Powiązania:
https://bibliotekanauki.pl/articles/1040817.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
peroxisome proliferator-activated receptor-gamma
thiazolidinediones
proteasome
pioglitazone
Opis:
Thiazolidinediones are oral antidiabetic agents that activate peroxisome proliferator-activated receptor-gamma (PPAR-γ) and exert potent antioxidant and anti-inflammatory properties. It has also been shown that PPAR-γ agonists induce G0/G1 arrest and apoptosis of malignant cells. Some of these effects have been suggested to result from inhibition of proteasome activity in target cells. The aim of our studies was to critically evaluate the cytostatic/cytotoxic effects of one of thiazolidinediones (pioglitazone) and its influence on proteasome activity. Pioglitazone exerted dose-dependent cytostatic/cytotoxic effects in MIA PaCa-2 cells. Incubation of tumor cells with pioglitazone resulted in increased levels of p53 and p27 and decreased levels of cyclin D1. Accumulation of polyubiquitinated proteins within cells incubated with pioglitazone suggested dysfunction of proteasome activity. However, we did not observe any influence of pioglitazone on the activity of isolated proteasome and on the proteolytic activity in lysates of pioglitazone-treated MIA PaCa-2 cells. Further, treatment with pioglitazone did not cause an accumulation of fluorescent proteasome substrates in transfected HeLa cells expressing unstable GFP variants. Our results indicate that pioglitazone does not act as a direct or indirect proteasome inhibitor.
Źródło:
Acta Biochimica Polonica; 2008, 55, 1; 75-84
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ovocystatin affects actin cytoskeleton organization and induces proapoptotic activity
Autorzy:
Malicka-Blaszkiewicz, Maria
Filipczak, Nina
Gołąb, Krzysztof
Juszczyńska, Katarzyna
Sebzda, Tadeusz
Gburek, Jakub
Powiązania:
https://bibliotekanauki.pl/articles/1039207.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
ovocystatin
egg white cystatin
actin cytoskeleton
apoptosis
Opis:
Ovocystatin is a chicken egg white protein, generally known for its inhibitory activity against cysteine proteases. However, biological activity of ovocystatin does not seem to be well recognized in respect to other possible cellular effects. Our attention has been focused on ovocystatin cytotoxic effects in relation to its influence on actin cytoskeleton organization and apoptosis induction. In vitro studies with human melanoma A375, human cervix HeLa cancer cells and normal human fibroblasts - NHDF were done. Cytotoxic activity of ovocystatin was seen in respect to apoptosis induction - manifested by cell shape changes, phosphatydylserine translocation and actin cytoskeleton reorganization. Normal human fibroblasts have shown lower sensitivity to ovocystatin as compared with human melanoma A375 and human cervix HeLa cancer cells. In conclusion, ovocystatin affects actin cytoskeleton organization and displays proapoptotic activity towards applied cell lines. This implicates its application as a potential anticancer drug. However, its adverse effects on normal cells should be taken into consideration.
Źródło:
Acta Biochimica Polonica; 2014, 61, 4; 753-758
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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