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Wyszukujesz frazę "Apoptosis" wg kryterium: Temat


Tytuł:
Wybrane zmiany fenotypowe oraz funkcjonalne zachodzące w komórkach raka jajnika poddanych in vitro terapii kombinowanej z zastosowaniem cisplatyny oraz hipertermii
Selected phenotypic and functional changes in ovarian cancer cells treated in vitro with combined therapy using cisplatin and hyperthermia
Autorzy:
Zoń, Aleksandra
Bednarek, Ilona
Powiązania:
https://bibliotekanauki.pl/articles/2234036.pdf
Data publikacji:
2023-07-28
Wydawca:
Śląski Uniwersytet Medyczny w Katowicach
Tematy:
rak jajnika
hipertermia
apoptoza
cisplatyna
zmiany morfologiczne
test migracji komórek in vitro
ovarian cancer
hyperthermia
apoptosis
cisplatin
morphological changes
wound healing assay
Opis:
WSTĘP: Typową strategią leczenia raka jajnika jest operacja chirurgiczna oraz podawana po niej chemioterapia wykorzystująca leki cytostatyczne, w tym cisplatynę. Niestety u większości pacjentek dochodzi do nawrotu choroby, którego głównym powodem jest wykształcanie przez komórki nowotworowe oporności na cisplatynę. Z tego względu intensywnie poszukuje się nowych rozwiązań terapeutycznych, m.in. terapii skojarzonej, której przykładem jest jednoczesne traktowanie komórek lekiem cytostatycznym oraz hipertermią. Celem pracy była ocena zmian fenotypowych oraz funkcjonalnych w komórkach raka jajnika poddanych działaniu cisplatyny i/lub umiarkowanej hipertermii. MATERIAŁ I METODY: Linie komórek raka jajnika SKOV-3 [ATCC: HTB-77] oraz TOV-21G [ATCC: CRL-11730] stymulowano do apoptozy z wykorzystaniem dichlorku cis-diamino platyny (II). Następnie komórki poddawano działaniu umiarkowanej hipertermii poprzez umieszczenie w temperaturach 39°C i 40°C oraz w temperaturze standardowej 37°C. Zmiany fenotypowe w obrębie badanych komórek weryfikowano z wykorzystaniem barwienia fluorescencyjnego z użyciem oranżu akrydyny, bromku etydyny oraz DAPI (4′,6-diamidyno-2-fenyloindol). Zmiany funkcjonalne odnoszące się do migracji in vitro komórek analizowano testem zarastania rany (wound healing assay). WYNIKI: Wykazano, że działanie na komórki cisplatyną indukowało śmierć komórek o charakterze apoptotycznym, przy czym zauważono efekt potencjalizacji działania cytostatyku na komórki poprzez zastosowanie umiarkowanej hipertermii (39C oraz 40C). Dodatkowo, w przypadku komórek linii SKOV-3 traktowanych wspomnianymi czynnikami, zaobserwowano istotny statystycznie spadek migracji komórek in vitro w odniesieniu do populacji komórek kontrolnych. WNIOSKI: Traktowanie komórek raka jajnika cisplatyną oraz umiarkowaną hipertermią prowadzi do zmian fenotypowych, charakterystycznych dla procesów apoptozy. Dodatkowo zastosowanie obu tych czynników indukuje takie zmiany w komórkach, które zmniejszają migrację komórek, a tym samym wpływają na zmniejszenie potencjału metastatycznego komórek raka jajnika.
INTRODUCTION: The typical treatment strategy used for ovarian cancer is surgery followed by chemotherapy using cytostatic drugs, including cisplatin. Unfortunately, the majority of patients experience a relapse of the disease, the main reason for which is the development of cisplatin resistance. Due to this, new treatment strategies are being sought, including combination therapy, an example of which is the simultaneous treatment of cells with a cytostatic drug and hyperthermia. The aim of the study was to assess the occurrence of phenotypic and functional changes in ovarian cancer cells treated with cisplatin and/or moderate hyperthermia. MATERIAL AND METHODS: Ovarian cancer cell lines SKOV-3 and TOV-21G were stimulated to apoptosis using cis-diammineplatinum(II) dichloride. Subsequently, the cells were subjected to hyperthermia by placing them in temperatures of 39°C, 40°C and a standard temperature of 37°C. Phenotypic changes within the cells were verified by fluorescent staining with acridine orange, ethidium bromide and DAPI (4′,6-diamidino-2-phenylindole). Functional changes related to in vitro cell migration were analyzed with the wound healing assay. RESULTS: It was shown that the effect of cisplatin on the cells led to death by apoptosis, whereby the effect of potentiating the action of the cytostatic agent by the use of moderate hyperthermia was noticed. In addition, in the case of cells of the SKOV-3 line treated with the aforementioned agents, a statistically significant decrease in cell migration was observed in relation to the population of control cells. CONCLUSIONS: The obtained results indicate that the treatment of ovarian cancer cells with cisplatin and moderate hyperthermia leads to the appearance of phenotypic changes in these cells, characteristic of apoptotic processes. In addition, the application of both agents induces such changes in the cells that reduce cell migration, thereby reducing the metastatic potential of ovarian cancer cells.
Źródło:
Annales Academiae Medicae Silesiensis; 2023, 77, 1; 115-127
1734-025X
Pojawia się w:
Annales Academiae Medicae Silesiensis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Main Pro-Apoptotic Member of Bcl-2 Family Proteins – Bax
Autorzy:
Żołnierczyk, Jolanta Dominika
Kiliańska, Zofia Maria
Powiązania:
https://bibliotekanauki.pl/articles/764983.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
apoptosis
Bcl-2 family
Bax
apoptosis mitochondrial pathway
Opis:
Programmed cell death (apoptosis) plays a vital role in the regulation of cellular homeostasis. Because of apoptosis fundamental importance, this process is highly regulated. One important set of factors involved in apoptosis regulation is the Bcl-2 family proteins. Bcl-2 family members form a complex regulatory network that controls cell survival and death in response to different physiological and pathological signals. This family includes both pro- and anti-apoptotic members, and Bax protein (Mol wt 21 kDa) is a major pro-apoptotic factor with multifunctional activity. This review summarizes new data about the main representative of Bcl-2 family – Bax, its structure and mechanism(s) by which this protein modulates apoptosis.
Źródło:
Acta Universitatis Lodziensis. Folia Biologica et Oecologica; 2010, 6; 5-32
1730-2366
2083-8484
Pojawia się w:
Acta Universitatis Lodziensis. Folia Biologica et Oecologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
17 beta-estradiol affects proliferation and apoptosis of canine bone marrow mesenchymal stem cells in vitro
Autorzy:
Zhou, Z.-H.
Gu, C.-W.
Li, J.
Huang, X.-Y.
Deng, J.-Q.
Shen, L.-H.
Cao, S.-Z.
Deng, J.-L.
Zuo, Z.-C.
Wang, Y.
Ma, X.-P.
Ren, Z.-H.
Yu, S.-M.
Powiązania:
https://bibliotekanauki.pl/articles/2087308.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
apoptosis
bone marrow mesenchymal stem cells (BMSCs)
canine
proliferation
17 beta-estradiol (E2)
Źródło:
Polish Journal of Veterinary Sciences; 2020, 23, 2; 235-245
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effects of velvet antler polypeptides on the phenotype and related biological indicators of osteoarthritic rabbit chondrocytes
Autorzy:
Zhang, Zhengyao
Liu, Xiaofeng
Duan, Lengxin
Li, Xia
Zhang, Yang
Zhou, Qiuli
Powiązania:
https://bibliotekanauki.pl/articles/1039876.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
velvet antler polypeptides
MMP
osteoarthritic chondrocytes
apoptosis
Opis:
Objective: To study the effects of velvet antler polypeptides (VAPs) on osteoarthritic chondrocytes (OCs) in rabbits. Methods: An osteoarthritic rabbit model was established according to Hulth's method. OCs were isolated and cultured for observation of the cell cycle. Cell proliferation was detected by MTT assay and the cell cycle was monitored by flow cytometry. The phenotype was determined by toluidine blue staining as well as immunohistochemical staining for collagen type II. The expression of MMP-1, MMP-3, MMP-13, TIMP-1, and collagen I and X mRNA by chondrocytes was assayed by RT-PCR. Results: The VAPs had no obvious proliferative effect on OCs and did not affect the cell cycle. However, they significantly reduced the proportion of early apoptotic cells in a dose-dependent manner. Further, VAPs inhibited the expression of collagen I and X mRNA and induced abnormal expression of MMP-1 and MMP-13 mRNA. VAPs had no significant effect on MMP-3 and TIMP-1 mRNA levels. The toluidine blue and collagen type II immunohistochemical staining intensities of VAP-treated chondrocytes were positively correlated with the concentration of VAPs used. Conclusion: VAPs had no significant effect on OC proliferation and the cell cycle, but did increase the glycosaminoglycan (GAG) and collagen type II expression levels in the extracellular matrix, and down-regulated collagen I and X mRNA expression. Treatment of cartilage cells with VAPs maintained their normal phenotype, inhibited matrix metalloproteinases (MMPs) secretion, kept the balance of cartilage matrix metabolism, and sustained an external environment where the cartilage cells could survive. Moreover, VAPs reduced the proportion of early apoptotic cells, suggesting that they may block the apoptotic pathway in OCs.
Źródło:
Acta Biochimica Polonica; 2011, 58, 3; 297-302
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
COMBINATION OF BERBERINE AND MATRINE AFFECTS APOPTOSIS AND CELLCYCLE IN HUMAN CERVICAL CANCER CELLS
Autorzy:
Zhang, Qijiayu
Sun, Yi
Huang, Yuxi
Sun, Jing
Zhao, Chongbo
Song, Yijun
Wu, Juanhua
Powiązania:
https://bibliotekanauki.pl/articles/895719.pdf
Data publikacji:
2019-12-29
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
apoptosis
cervical cancer
Matrine
berberine
Opis:
Cervical cancer is the fourth leading cause of malignancy-related mortality in women worldwide, and effective advanced-stage therapies are urgently required. Berberine is a quaternary ammonium compound extracted from traditional Chinese medicinal herbs, including Phellodendron spp., with antibacterial and antitumor activities. Matrine, the main active ingredient of Sophora flavescens rhizomes, has not only traditionally described health effects but is also widely used for its anticancer, anti-inflammatory, immunoregulatory, antiviral, and hepatoprotective effects. We investigated the antitumor activities of berberine and matrine against human cervical cancer HeLa and SiHa cells using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, along with flow cytometry and western blotting analyses, to assess the effect of the compounds on the cellular status and apoptosis- and cell cycle-related proteins. The 24 h half-maximal inhibitory concentrations (IC50) of berberine and matrine were 123.633 ± 4.278 µmol/L and 9.625 ± 0.245 mmol/L against HeLa cells and 105.067 ± 3.745 µmol/L and 8.50 ± 0.23 mmol/L against SiHa cells, respectively. Berberine plus matrine inhibited cancer cell growth and caused cell cycle arrest. We observed an increased stimulation of apoptosis, which was likely mediated by enhanced levels of caspase-3, caspase-9, and B-cell lymphoma 2 (Bcl-2)-associated X protein (Bax), as well as decreased Bcl-2 protein expression. Cell cycle arrest in the G1 phase was probably mediated by p21 upregulation and cyclin-dependent kinase (Cdk)-4, Cdk-6, and cyclin D1 suppression. Combination treatment with berberine and matrine effectively inhibited human cervical cancer cell proliferation, most likely by stimulating apoptosis and inducing cell cycle arrest.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2019, 76, 6; 1089-1097
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Different gene expression profiles of AD293 and HEK293 cell lines that show contrasting susceptibility to apoptosis induced by overexpression of Bim L
Autorzy:
Zhang, Jiayi
Chen, Jinzhong
Liu, Lingfeng
Ji, Chaoneng
Gu, Shaohua
Ying, Kang
Mao, Yumin
Powiązania:
https://bibliotekanauki.pl/articles/1041208.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
Bim-L
expression profile
apoptosis
AD293
SSH
Opis:
Bim is a pro-apoptotic member of the Bcl-2 protein family. Overexpression of Bim proved to be highly cytotoxic for diverse cells.The AD293 cell line is derived directly from the HEK293 cell line but has been transfected with a gene that can improve cell adherence.We found that there was almost no apoptosis seen in Bim L-transfected AD293 cells, but more than half ofBim L-transfected HEK293 cells underwent apoptosis. Suppression subtractive hybridizationwas used to detect the different gene expression profile between these two cell lines. In 192 sequencedpositive clones, there were 30 clones repeating twice or more. Ten genes were selected for identification by semi-quantitative RT-PCR.Thetranscripts of two adhesion-relatedgenes (actin and parvin)and two apoptosis-related genes (cyclin 2 and protein phosphatase 1G) were up-regulated in AD293 cells. These results suggest that the high expression of cell adhesion-related proteins might be responsible for the different apoptosis status after the transfection of Bim L.Our data provide candidate genes responsible for the different apoptosis sensitivity of these two cell lines. Further investigation on thedifferential expression profile between AD293 and HEK293 might improve our understanding of cell apoptosis mechanism.
Źródło:
Acta Biochimica Polonica; 2006, 53, 3; 525-530
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes in GSH-antioxidant system induced by daunorubicin in human normal and diabetic fibroblasts.
Autorzy:
Zatorska, Agnieszka
Maszewski, Janusz
Jóźwiak, Zofia
Powiązania:
https://bibliotekanauki.pl/articles/1043460.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
glutathione S-transferase
glutathione reductase
glutathione peroxidase
daunorubicin
apoptosis
glutathione
oxidative stress
Opis:
We investigated the effect of daunorubicin on glutathione content and activity of GSH-related enzymes in cultured normal and diabetic human fibroblasts. Cells were incubated with 4 μM daunorubicin (DNR) for 2 h followed by culture in drug-free medium for up to 72 h. Treatment of diabetic cells with the drug caused a time-dependent depletion of intracellular GSH and a decrease of the GSH to total glutathione ratio. GSH depletion was accompanied by apoptotic changes in morphology of the nucleus. Analysis of GSH-related enzymes showed a significant increase of the activities of Se-dependent and Se-independent peroxidases and glutathione S-transferase. In contrast, glutathione reductase activity was reduced by 50%. Significant differences between normal and diabetic cells exposed to DNR were observed in the level of GST and Se-dependent glutathione peroxidase activities. These findings indicated that daunorubicin efficiently affects the GSH antioxidant defense system both in normal and diabetic fibroblasts leading to disturbances in glutathione content as well as in the activity of GSH-related enzymes.
Źródło:
Acta Biochimica Polonica; 2003, 50, 3; 825-835
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Apoptosis induced by membrane damage in human lymphocytes; effects of arachidonic acid and its photoproducts.
Autorzy:
Zarębska, Zofia
Zielińska, Julia
Zhukov, Igor
Maśliński, Włodzimierz
Powiązania:
https://bibliotekanauki.pl/articles/1041476.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
photochemotherapy
PUVA
arachidonic acid-psoralen photoadduct
human lymphocytes
apoptosis
Opis:
The effect of arachidonic acid (AA) combined with UVA irradiation was studied in a model system mimicking phototherapy PUVA (psoralen+UVA) ex vivo in vitro. The contribution of damage to the plasma membrane by PUVA was tested on human lymphocytes derived from healthy donors. The effect of arachidonic acid (AA) combined with UVA irradiation was compared with that of a psoralen photoadduct to AA added to the culture. The adduct, obtained photochemically and purified, was characterized by NMR and MS spectrometry as a cycloadduct of psoralen to the vinylene bond of the acid (AA<>PSO). The reactions of cultured cells, manifested 20 h after treatment by changes in apoptosis and mitochondrial depolarization, were monitored by flow cytometry by tagging lymphocytes with appropriate fluorescent probes. Treatment of lymphocyte suspension within AA doses from 40 to 100 μM gradually induced a shift from Anx-V+ (single positive cells) to late apoptotic, Anx-V+PI+ (double positive cells) in a dose dependent manner. The adduct, AA<>PSO, induced apoptotic changes at a concentration 2-3 times higher than free AA. Combination of psoralen (1 μM ) or arachidonic acid (20-120 μM) with UVA irradiation (2-6 J/cm2) accelerated the plasma membrane changes in a synergic way. Preliminary studies indicated that changes in the transmembrane potential of mitochondria paralleled the apoptosis when cells were treated by AA alone. Our findings showed that UVA radiation of lymphocytes in the presence of arachidonic acid, as in the presence of psoralen, enhanced apoptosis of cells in a synergic manner. Thus, PUVA-induced apoptosis may proceed in part by a still undefined signaling pathway(s) triggered in lymphocyte membranes.
Źródło:
Acta Biochimica Polonica; 2005, 52, 1; 179-194
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cyanidin and peonidin inhibit SPCA-1 growth in vitro via inducing Cell Cycle Arrest and Apoptosis
Autorzy:
Yue, Heng
Xu, Qianqian
Lv, Liuzhuang
Xu, Jianfeng
Fan, Hua
Wang, Wenhan
Powiązania:
https://bibliotekanauki.pl/articles/895348.pdf
Data publikacji:
2019-06-28
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
Lung cancer
apoptosis
cell cycle
SPCA-1
cyanidin
peonidin
Opis:
Non-small cell lung cancer (NSCLC) accounts for the majority (85%) of all lung cancers. Although many therapies are available, 35–50% of patients with stage I or II NSCLC develop recurrence and metastasis. This study was designed to investigate the anti-tumor activity of cyanidin (Cy) and peonidin (Pn) on NSCLC cells (SPCA-1). SPCA-1 cell proliferation, cell cycle and early apoptosis were investigated after treatment with Cy and Pn. The underlying signaling mechanism was also explored by detecting the levels of apoptosis-related proteins using enzyme-linked immunosorbent assay (ELISA). Cy and Pn inhibited the viability of SPCA-1 cells with an IC50 of 141.08 μg/mL and 161.31 μg/mL, respectively. Meanwhile, Cy and Pn induced cell cycle arrest at G2/M phase. Cy and Pn treatment significantly increased the levels of Bax, P53, and Caspase-3, while decreasing that of Bcl-2, thereby inhibiting the growth of SPCA-1 cells. In conclusion, Cy and Pn induced early apoptosis of NSCLC cells through regulation of the levels on Caspase-3, Bax, Bcl-2, and P53. These results suggest Cy and Pn as potential anticancer drugs for the treatment of lung cancer.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2019, 76, 3; 503-509
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lipid peroxidation and cell cycle signaling : 4-hydroxynonenal, a key molecule in stress mediated signaling.
Autorzy:
Yang, Yusong
Sharma, Rajendra
Sharma, Abha
Awasthi, Sanjay
Awasthi, Yogesh
Powiązania:
https://bibliotekanauki.pl/articles/1043608.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
glutathione S-transferase
RLIP76
4-hydroxynonenal
RalBP1
cell cycle signaling
apoptosis
Opis:
Role of lipid peroxidation products, particularly 4-hydroxynonenal (4-HNE) in cell cycle signaling is becoming increasingly clear. In this article, recent studies suggesting an important role of 4-HNE in stress mediated signaling for apoptosis are critically evaluated. Evidence demonstrating the modulation of UV, oxidative stress, and chemical stress mediated apoptosis by blocking lipid peroxidation by the α-class glutathione S-transferases (GSTs) is presented which suggest an important role of these enzymes in protection against oxidative stress and a role of lipid peroxidation products in stress mediated signaling. Overexpression of 4-HNE metabolizing GSTs (mGSTA4-4, hGSTA4-4, or hGST5.8) protects cells against 4-HNE, oxidative stress (H2O2 or xanthine/xanthine oxidase), and UV-A mediated apoptosis by blocking JNK and caspase activation suggesting a role of 4-HNE in the mechanisms of apoptosis caused by these stress factors. The intracellular concentration of 4-HNE appears to be crucial for the nature of cell cycle signaling and may be a determinant for the signaling for differentiation, proliferation, transformation, or apoptosis. The intracellular concentrations of 4-HNE are regulated through a coordinated action of GSTs (GSTA4-4 and hGST5.8) which conjugate 4-HNE to GSH to form the conjugate (GS-HNE) and the transporter 76 kDa Ral-binding GTPase activating protein (RLIP76), which catalyze ATP-dependent transport of GS-HNE. A mild stress caused by heat, UV-A, or H2O2 with no apparent effect on the cells in culture causes a rapid, transient induction of hGST5.8 and RLIP76. These stress preconditioned cells acquire ability to metabolize and exclude 4-HNE at an accelerated pace and acquire relative resistance to apoptosis by UV and oxidative stress as compared to unconditioned control cells. This resistance of stress preconditioned cells can be abrogated by coating the cells with anti-RLIP76 antibodies which block the transport of GS-HNE. These studies and previous reports discussed in this article strongly suggest a key role of 4-HNE in stress mediated signaling.
Źródło:
Acta Biochimica Polonica; 2003, 50, 2; 319-336
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Overexpression of human CUTA isoform2 enhances the cytotoxicity of copper to HeLa cells
Autorzy:
Yang, Jingchun
Li, Qiang
Yang, Huirong
Yan, Lichong
Yang, Liu
Yu, Long
Powiązania:
https://bibliotekanauki.pl/articles/1040764.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
copper toxicity
CUTA isoform2
overexpression
copper-induced apoptosis
cell proliferation
Opis:
Copper, an essential transient element, can be toxic to cells when present in excess. Altered copper homeostasis is involved in pathological events of many diseases. Human CUTA isoform2 is a member of cation tolerance protein (CutA1) family. In this study, we examined the effect of CUTA isoform2 overexpression on copper toxicity. It was shown that overexpressed CUTA isoform2 sensitized HeLa cells to copper toxicity by promoting copper-induced apoptosis. The inhibition effect of excessive copper on cell proliferation was also enhanced by overexpressed CUTA isoform2. So CUTA isoform2 was implicated to be involved in the cytotoxicity of copper.
Źródło:
Acta Biochimica Polonica; 2008, 55, 2; 411-415
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
BERBERINE INDUCES AUTOPHAGY, APOPTOSIS AND MODULATES MIR-155 IN HEAD AND NECK SQUAMOUS CARCINOMA CELLS.
Autorzy:
Xue, Kai
Zhang, Binbin
He, Jingchuan
Powiązania:
https://bibliotekanauki.pl/articles/895286.pdf
Data publikacji:
2020-06-29
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
apoptosis
miR-155
Autophagy
berberine
Head and Neck cancer cells
Opis:
Berberine (BBR) an active natural plant alkaloid extracted from Coptidis rhizoma, displays potent anticancer activity over a variety of cancer cell lines. The cytotoxic activity of BBR in cancer cells is attributed to persuade, programmed cell death characterized by the release of cytochrome c, accompanied by activation of caspase-3 and caspase-9. In the present study, we evaluated BBR significantly reduces the cell viability and clonogenic property of head and neck squamous carcinoma (HNSC) cells. Our results revealed that BBR simultaneously induces apoptosis and autophagy in HNSC cells. Mechanistically, BBR induces autophagy in HNSC cells which were confirmed by acridine orange (AO) staining by visualization of prominent orange red color acidic autophagosomes in the cytoplasm. However, immunoblotting shows the steady conversion of MAP-LC-3I to LC-3II with concomitant degradation of autophagy substrate protein SQSTM1/p62. Annexin V FITC staining analysis by flow cytometry revealed a significant induction of apoptosis at higher doses of BBR. Furthermore, the immunoblotting analysis revealed a prominent cleavage of proapoptotic proteins procaspase-3 and PARP1 at higher doses of BBR. Additionally, we found significant upregulation and downregulation of tumor suppressor microRNA-155 (miR-155) and oncogenic miR-21 respectively, when HNSC cells were exposed to higher doses of BBR. In conclusion, these results demonstrate that BBR exhibits a significant anti-proliferative effect with the simultaneous induction of autophagy and apoptosis and modulates miRNA expression in HNSC cells.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2020, 77, 3; 485-494
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cytomegalovirus immediate early gene UL37 encodes a novel MHC-like protein
Autorzy:
Wyrwicz, Lucjan
Rychlewski, Leszek
Powiązania:
https://bibliotekanauki.pl/articles/1040815.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
Betaherpesvirinae
CMV
protein structure prediction
MHC I class
bioinformatics
apoptosis
Opis:
The cytomegalovirus (CMV) genome encodes four clusters of genes expressed immediately after infection - i.e.: UL36-38, UL122-123, TRS1-IRS1, and US3. The general function of these genes is associated with inhibition of cellular mechanisms of antiviral response. Although several biological processes have been mapped onto specific gene products, the knowledge of the molecular mechanism of their activity remains fragmentary. Here, we report the application of protein structure prediction methods in assigning the function to a glycosylated domain encoded by UL37 of CMV (gpUL37, UL37x3). The discerned similarity clearly points out that this domain represents a novel type of a major histocompatibility complex (MHC)-like protein, and consequently may play a central role in an additional mechanism of escape from antiviral response.
Źródło:
Acta Biochimica Polonica; 2008, 55, 1; 67-74
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reversal of drug resistance by silencing Survivin gene expression in acute myeloid leukemia cells
Autorzy:
Wu, Yao-Hui
You, Yong
Chen, Zhi-Chao
Zou, Ping
Powiązania:
https://bibliotekanauki.pl/articles/1040668.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
chemotherapeutic resistance
Survivin
acute myeloid leukemia
shRNA
apoptosis
Opis:
The role of Survivin in the pathogenesis of leukemia was explored in order to discover the effective avenues for gene therapy. Most primary leukemia cells isolated from patients as well as three leukemia cell lines (HL-60, K562, and U937) all expressed Survivin gene. To investigate the relationship between Survivin and chemotherapeutic resistance, HL-60 cells were treated with daunorubicin (DNR), mitoxantrone (MIT) or arsenious oxide (As2O3), and it was found that after 24 h the level of Survivin mRNA was decreased by 9.7%, 41.0% and 27.5%, respectively. At 72 h, the level of Survivin mRNA was increased by 21.2% and 65.2% in HL-60 cells treated with DNR or MIT, but decreased by 33.2% in those treated with As2O3 as compared with that in the cells treated for 24 h. These results showed that DNR and MIT could initally decrease the expression of Survivin and then increase it, but As2O3 could decrease the Survivin expression continually. Furthermore, shRNA plasmids targeting the Survivin gene (pEGFP-Survivin), which can silence the expression of Survivin with a high specificity, were constructed. pEGFP-Survivin and pEGFP-H1 were transfected into HL-60 cells via electroporation and selected by G418, and HL-60/Survivin and HL-60/EGFP cells were obtained. After treatment with DNR, the cell survival rate and IC50 of DNR in HL-60/Survivin cells were decreased substantially as compared with those of HL-60/EGFP and HL-60 cells (IC50 of DNR: 18.3 ± 2.45 vs 40.8 ± 6.37 and 39.2 ± 5.91 ng/ml, respectively), and the apoptosis rate was elevated ((84.3 ± 19.7)% vs (45.8 ± 13.8)% and (50.9 ± 12.4)%, respectively). These results suggest that shRNA can down-regulate the expression of Survivin in HL-60 cells substantially and improve their sensitivity to DNR. They also further explain the pathogenesis of leukemia drug resistance and provide new theory in the design of clinical therapies.
Źródło:
Acta Biochimica Polonica; 2008, 55, 4; 673-680
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cloning and purification of functionally active Fas ligand interfering protein (FIP) expressed in Escherichia coli
Autorzy:
Wisniewski, Pawel
Master, Adam
Kaminska, Bozena
Powiązania:
https://bibliotekanauki.pl/articles/1040813.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
Fas ligand
interfering molecules
recombinant protein purification
Fas
apoptosis
Opis:
This report presents purification and characterization of the extracellular domain of rat Fas protein, called FIP (FasL interfering protein), expressed as inclusion bodies in Escherichia coli. FIP was extracted from the inclusion bodies, solubilized with 8 M urea, purified by a single-step immobilized metal ion (Ni2+) affinity chromatography and refolded. SDS/PAGE and mass spectrometry analysis of the purified protein verified its purity. Fluorescence spectrum analysis showed that the refolding procedure caused structural changes which presumably might have led to oligomerization. The purified FIP has biological activities: it binds specifically soluble Fas ligand and protects human Jurkat lymphocytes against FasL-dependent apoptosis. This efficient procedure of FIP expression in E. coli and renaturation may be useful for production of therapeutically important proteins.
Źródło:
Acta Biochimica Polonica; 2008, 55, 1; 51-56
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł

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