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  1. Article ; Online: Alpha-1 antitrypsin expression is upregulated in multidrug-resistant cancer cells.

    Divac Rankov, Aleksandra / Jovanović Stojanov, Sofija / Dragoj, Miodrag / Ljujić, Mila

    Histochemistry and cell biology

    2022  Volume 159, Issue 5, Page(s) 431–437

    Abstract: Identification of the signature molecular profiles involved in therapy resistance is of vital importance in developing new strategies for treatments and disease monitoring. Protein alpha-1 antitrypsin (AAT, encoded by SERPINA1 gene) is an acute-phase ... ...

    Abstract Identification of the signature molecular profiles involved in therapy resistance is of vital importance in developing new strategies for treatments and disease monitoring. Protein alpha-1 antitrypsin (AAT, encoded by SERPINA1 gene) is an acute-phase protein, and its high expression has been linked with unfavorable clinical outcome in different types of cancer; however, data on its involvement in therapy resistance are still insufficient. We analyzed SERPINA1 mRNA expression in three different multidrug-resistant (MDR) cell lines-U87-TxR, NCI-H460/R, and DLD1-TxR-and in U87 cells grown in alginate microfibers as a 3D cellular model of glioblastoma. Expression of IL-6 as a major modulator of SERPINA1 was also analyzed. Additionally, AAT protein expression in MDR cells was analyzed by immunofluorescence. SERPINA1 gene expression and AAT protein expression were significantly upregulated in all the tested MDR cell lines compared with their sensitive counterparts. Moreover, SERPINA1 was significantly upregulated in 3D models of glioblastoma, previously found to have upregulated drug-resistance-related gene expression compared with 2D cells. With the exception of NCI-H460/R, in all cell lines as well as in a 3D model of U87 cells, increase in SERPINA1 expression correlated with the increase in IL-6 expression. Our results indicate that AAT could be utilized as a biomarker of therapy resistance in cancer; however, further studies are needed to elucidate the mechanisms driving AAT upregulation in therapy resistance and its biological significance in this process.
    MeSH term(s) Humans ; Drug Resistance, Multiple ; Glioblastoma/drug therapy ; Glioblastoma/genetics ; Interleukin-6 ; Drug Resistance, Neoplasm
    Chemical Substances Interleukin-6
    Language English
    Publishing date 2022-12-19
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1222930-1
    ISSN 1432-119X ; 0301-5564 ; 0948-6143
    ISSN (online) 1432-119X
    ISSN 0301-5564 ; 0948-6143
    DOI 10.1007/s00418-022-02172-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Electronic cigarette liquids impair metabolic cooperation and alter proteomic profiles in V79 cells.

    Trifunovic, Sara / Smiljanić, Katarina / Sickmann, Albert / Solari, Fiorella A / Kolarevic, Stoimir / Divac Rankov, Aleksandra / Ljujic, Mila

    Respiratory research

    2022  Volume 23, Issue 1, Page(s) 191

    Abstract: Background: Although still considered a safer alternative to classical cigarettes, growing body of work points to harmful effects of electronic cigarettes (e-cigarettes) affecting a range of cellular processes. The biological effect of e-cigarettes ... ...

    Abstract Background: Although still considered a safer alternative to classical cigarettes, growing body of work points to harmful effects of electronic cigarettes (e-cigarettes) affecting a range of cellular processes. The biological effect of e-cigarettes needs to be investigated in more detail considering their widespread use.
    Methods: In this study, we treated V79 lung fibroblasts with sub-cytotoxic concentration of e-cigarette liquids, with and without nicotine. Mutagenicity was evaluated by HPRT assay, genotoxicity by comet assay and the effect on cellular communication by metabolic cooperation assay. Additionally, comprehensive proteome analysis was performed via high resolution, parallel accumulation serial fragmentation-PASEF mass spectrometry.
    Results: E-cigarette liquid concentration used in this study showed no mutagenic or genotoxic effect, however it negatively impacted metabolic cooperation between V79 cells. Both e-cigarette liquids induced significant depletion in total number of proteins and impairment of mitochondrial function in treated cells. The focal adhesion proteins were upregulated, which is in accordance with the results of metabolic cooperation assay. Increased presence of posttranslational modifications (PTMs), including carbonylation and direct oxidative modifications, was observed. Data are available via ProteomeXchange with identifier PXD032071.
    Conclusions: Our study revealed impairment of metabolic cooperation as well as significant proteome and PTMs alterations in V79 cells treated with e-cigarette liquid warranting future studies on e-cigarettes health impact.
    MeSH term(s) Electronic Nicotine Delivery Systems ; Nicotine/pharmacology ; Proteome ; Proteomics ; Tobacco Products
    Chemical Substances Proteome ; Nicotine (6M3C89ZY6R)
    Language English
    Publishing date 2022-07-15
    Publishing country England
    Document type Journal Article
    ZDB-ID 2041675-1
    ISSN 1465-993X ; 1465-993X
    ISSN (online) 1465-993X
    ISSN 1465-993X
    DOI 10.1186/s12931-022-02102-w
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Decreased TSPAN14 Expression Contributes to NSCLC Progression.

    Jovanović, Mirna / Stanković, Tijana / Stojković Burić, Sonja / Banković, Jasna / Dinić, Jelena / Ljujić, Mila / Pešić, Milica / Dragoj, Miodrag

    Life (Basel, Switzerland)

    2022  Volume 12, Issue 9

    Abstract: Tspan14 is a transmembrane protein of the tetraspanin (Tspan) protein family. Different members of the Tspan family can promote or suppress tumor progression. The exact role of Tspan14 in tumor cells is unknown. Earlier, mutational inactivation of the ... ...

    Abstract Tspan14 is a transmembrane protein of the tetraspanin (Tspan) protein family. Different members of the Tspan family can promote or suppress tumor progression. The exact role of Tspan14 in tumor cells is unknown. Earlier, mutational inactivation of the TSPAN14 gene has been proposed to coincide with a low survival rate in NSCLC patients. This study aimed to investigate the correlation of TSPAN14 lack of function with clinicopathological features of NSCLC patients, and to elucidate the role TSPAN14 might have in NSCLC progression. TSPAN14 expression was lower in tumor cells than non-tumor cells in NSCLC patients' samples. The decreased gene expression was correlated with a low survival rate of patients and was more frequent in patients with aggressive, invasive tumor types. Additionally, the role of decreased TSPAN14 expression in the metastatic potential of cancer cells was confirmed in NSCLC cell lines. The highly invasive NSCLC cell line (NCI-H661) had the lowest TSPAN14 gene and protein expression, whereas the NSCLC cell line with the highest TSPAN14 expression (NCI-H460) had no significant metastatic potential. Finally, silencing of TSPAN14 in these non-metastatic cancer cells caused an increased expression of matrix-degrading enzymes MMP-2 and MMP-9, followed by an elevated capacity of cancer cells to degrade gelatin. The results of this study propose TSPAN14 expression as an indicator of NSCLC metastatic potential and progression.
    Language English
    Publishing date 2022-08-23
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662250-6
    ISSN 2075-1729
    ISSN 2075-1729
    DOI 10.3390/life12091291
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Autophagy Inhibition Enhances Anti-Glioblastoma Effects of Pyrazolo[3,4-

    Jovanović Stojanov, Sofija / Kostić, Ana / Ljujić, Mila / Lupšić, Ema / Schenone, Silvia / Pešić, Milica / Dinić, Jelena

    Life (Basel, Switzerland)

    2022  Volume 12, Issue 10

    Abstract: Drug resistance presents a major obstacle to the successful treatment of glioblastoma. Autophagy plays a key role in drug resistance, particularly in relation to targeted therapy, which has prompted the use of autophagy inhibitors to increase the ... ...

    Abstract Drug resistance presents a major obstacle to the successful treatment of glioblastoma. Autophagy plays a key role in drug resistance, particularly in relation to targeted therapy, which has prompted the use of autophagy inhibitors to increase the effectiveness of targeted therapeutics. The ability of two Src tyrosine kinase inhibitors, Si306 and its prodrug pro-Si306, to induce autophagy was evaluated in the human glioblastoma cell line U87 and its multidrug-resistant counterpart U87-TxR. Autophagy markers were assessed by flow cytometry, microscopy, and Western blot, and induction of autophagy by these compounds was demonstrated after 3 h as well as 48 h. The effects of Si306 and pro-Si306 on cell proliferation and cell death were examined in the presence or absence of autophagy inhibition by bafilomycin A1. Combined treatments of Si306 and pro-Si306 with bafilomycin A1 were synergistic in nature, and the inhibition of autophagy sensitized glioblastoma cells to Src tyrosine kinase inhibitors. Si306 and pro-Si306 more strongly inhibited cell proliferation and triggered necrosis in combination with bafilomycin A1. Our findings suggest that modulation of Si306- and pro-Si306-induced autophagy can be used to enhance the anticancer effects of these Src tyrosine kinase inhibitors and overcome the drug-resistant phenotype in glioblastoma cells.
    Language English
    Publishing date 2022-09-27
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662250-6
    ISSN 2075-1729
    ISSN 2075-1729
    DOI 10.3390/life12101503
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Molecular Diagnostics of Cystic Fibrosis in Serbia: Our Approach to Meet the Diagnostic Challenges.

    Divac Rankov, Aleksandra / Kusic-Tisma, Jelena / Ljujic, Mila / Nikolic, Aleksandra / Milosevic, Katarina / Vilotijevic Dautovic, Gordana / Radojkovic, Dragica

    Genetic testing and molecular biomarkers

    2020  Volume 24, Issue 4, Page(s) 212–216

    Abstract: Background: ...

    Abstract Background:
    MeSH term(s) Cohort Studies ; Cystic Fibrosis/diagnosis ; Cystic Fibrosis/genetics ; Cystic Fibrosis Transmembrane Conductance Regulator/genetics ; Cystic Fibrosis Transmembrane Conductance Regulator/metabolism ; Exons/genetics ; Female ; Genetics, Population/methods ; High-Throughput Nucleotide Sequencing/methods ; Humans ; Male ; Mutation/genetics ; Pathology, Molecular/methods ; Polymerase Chain Reaction/methods ; Polymorphism, Restriction Fragment Length/genetics ; Serbia/epidemiology
    Chemical Substances Cystic Fibrosis Transmembrane Conductance Regulator (126880-72-6)
    Language English
    Publishing date 2020-04-14
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2486664-7
    ISSN 1945-0257 ; 1945-0265
    ISSN (online) 1945-0257
    ISSN 1945-0265
    DOI 10.1089/gtmb.2019.0171
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Targeting autophagy to modulate cell survival: a comparative analysis in cancer, normal and embryonic cells.

    Divac Rankov, Aleksandra / Ljujić, Mila / Petrić, Marija / Radojković, Dragica / Pešić, Milica / Dinić, Jelena

    Histochemistry and cell biology

    2017  Volume 148, Issue 5, Page(s) 529–544

    Abstract: Autophagy is linked to multiple cancer-related signaling pathways, and represents a defense mechanism for cancer cells under therapeutic stress. The crosstalk between apoptosis and autophagy is essential for both tumorigenesis and embryonic development. ... ...

    Abstract Autophagy is linked to multiple cancer-related signaling pathways, and represents a defense mechanism for cancer cells under therapeutic stress. The crosstalk between apoptosis and autophagy is essential for both tumorigenesis and embryonic development. We studied the influence of autophagy on cell survival in pro-apoptotic conditions induced by anticancer drugs in three model systems: human cancer cells (NCI-H460, COR-L23 and U87), human normal cells (HaCaT and MRC-5) and zebrafish embryos (Danio rerio). Autophagy induction with AZD2014 and tamoxifen antagonized the pro-apoptotic effect of chemotherapeutics doxorubicin and cisplatin in cell lines, while autophagy inhibition by wortmannin and chloroquine synergized the action of both anticancer agents. This effect was further verified by assessing cleaved caspase-3 and PARP-1 levels. Autophagy inhibitors significantly increased both apoptotic markers when applied in combination with doxorubicin while autophagy inducers had the opposite effect. In a similar manner, autophagy induction in zebrafish embryos prevented cisplatin-induced apoptosis in the tail region while autophagy inhibition increased cell death in the tail and retina of cisplatin-treated animals. Autophagy modulation with direct inhibitors of the PI3kinase/Akt/mTOR pathway (AZD2014 and wortmannin) triggered the cellular response to anticancer drugs more effectively in NCI-H460 and zebrafish embryonic models compared to HaCaT suggesting that these modulators are selective towards rapidly proliferating cells. Therefore, evaluating the autophagic properties of chemotherapeutics could help determine more accurately the fate of different cell types under treatment. Our study underlines the importance of testing autophagic activity of potential anticancer agents in a comparative approach to develop more rational anticancer therapeutic strategies.
    MeSH term(s) Animals ; Antineoplastic Agents/pharmacology ; Autophagy/drug effects ; Cell Survival/drug effects ; Cells, Cultured ; Embryo, Nonmammalian/cytology ; Embryo, Nonmammalian/drug effects ; Humans ; Neoplasms/drug therapy ; Neoplasms/pathology ; Zebrafish/embryology
    Chemical Substances Antineoplastic Agents
    Language English
    Publishing date 2017-11
    Publishing country Germany
    Document type Comparative Study ; Journal Article
    ZDB-ID 1222930-1
    ISSN 1432-119X ; 0301-5564 ; 0948-6143
    ISSN (online) 1432-119X
    ISSN 0301-5564 ; 0948-6143
    DOI 10.1007/s00418-017-1590-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Alpha-1-antitrypsin in pathogenesis of hepatocellular carcinoma.

    Topic, Aleksandra / Ljujic, Mila / Radojkovic, Dragica

    Hepatitis monthly

    2012  Volume 12, Issue 10 HCC, Page(s) e7042

    Abstract: Context: Alpha-1-antitrypsin (A1AT) is the most abundant liver-derived, highly polymorphic, glycoprotein in plasma. Hereditary deficiency of alpha-1-antitrypsin in plasma (A1ATD) is a consequence of accumulation of polymers of A1AT mutants in ... ...

    Abstract Context: Alpha-1-antitrypsin (A1AT) is the most abundant liver-derived, highly polymorphic, glycoprotein in plasma. Hereditary deficiency of alpha-1-antitrypsin in plasma (A1ATD) is a consequence of accumulation of polymers of A1AT mutants in endoplasmic reticulum of hepatocytes and other A1AT-producing cells. One of the clinical manifestations of A1ATD is liver disease in childhood and cirrhosis and/or hepatocellular carcinoma (HCC) in adulthood. Epidemiology and pathophysiology of liver failure in early childhood caused by A1ATD are well known, but the association with hepatocellular carcinoma is not clarified. The aim of this article is to review different aspects of association between A1AT variants and hepatocellular carcinoma, with emphasis on the epidemiology and molecular pathogenesis. The significance of A1AT as a biomarker in the diagnosis of HCC is also discussed.
    Evidence acquisitions: Search for relevant articles were performed through Pub Med, HighWire, and Science Direct using the keywords "alpha-1-antitrypsin", "liver diseases", "hepatocellular carcinoma", "SERPINA1". Articles published until 2011 were reviewed.
    Results: Epidemiology studies revealed that severe A1ATD is a significant risk factor for cirrhosis and HCC unrelated to the presence of HBV or HCV infections. However, predisposition to HCC in moderate A1ATD is rare, and probably happens in combination with HBV and/or HCV infections or other unknown risk factors. It is assumed that accumulation of polymers of A1ATD variants in endoplasmic reticulum of hepatocytes leads to damage of hepatocytes by gain-of-function mechanism. Also, increased level of A1AT was recognized as diagnostic and prognostic marker of HCC.
    Conclusions: Clarification of a carcinogenic role for A1ATD and identification of proinflammatory or some still unknown factors that lead to increased susceptibility to HCC associated with A1ATD may contribute to a better understanding of hepatic carcinogenesis and to the development of new drugs.
    Language English
    Publishing date 2012-10-30
    Publishing country Iran
    Document type Journal Article
    ZDB-ID 2236753-6
    ISSN 1735-3408 ; 1735-143X
    ISSN (online) 1735-3408
    ISSN 1735-143X
    DOI 10.5812/hepatmon.7042
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: The integrated stress response.

    Pakos-Zebrucka, Karolina / Koryga, Izabela / Mnich, Katarzyna / Ljujic, Mila / Samali, Afshin / Gorman, Adrienne M

    EMBO reports

    2016  Volume 17, Issue 10, Page(s) 1374–1395

    Abstract: In response to diverse stress stimuli, eukaryotic cells activate a common adaptive pathway, termed the integrated stress response (ISR), to restore cellular homeostasis. The core event in this pathway is the phosphorylation of eukaryotic translation ... ...

    Abstract In response to diverse stress stimuli, eukaryotic cells activate a common adaptive pathway, termed the integrated stress response (ISR), to restore cellular homeostasis. The core event in this pathway is the phosphorylation of eukaryotic translation initiation factor 2 alpha (eIF2α) by one of four members of the eIF2α kinase family, which leads to a decrease in global protein synthesis and the induction of selected genes, including the transcription factor ATF4, that together promote cellular recovery. The gene expression program activated by the ISR optimizes the cellular response to stress and is dependent on the cellular context, as well as on the nature and intensity of the stress stimuli. Although the ISR is primarily a pro-survival, homeostatic program, exposure to severe stress can drive signaling toward cell death. Here, we review current understanding of the ISR signaling and how it regulates cell fate under diverse types of stress.
    MeSH term(s) Animals ; Gene Expression Regulation/drug effects ; Homeostasis ; Host-Pathogen Interactions ; Humans ; Protein Binding ; Protein Processing, Post-Translational/drug effects ; Signal Transduction/drug effects ; Stress, Physiological ; Transcription Factors/metabolism
    Chemical Substances Transcription Factors
    Language English
    Publishing date 2016-09-14
    Publishing country England
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ZDB-ID 2020896-0
    ISSN 1469-3178 ; 1469-221X
    ISSN (online) 1469-3178
    ISSN 1469-221X
    DOI 10.15252/embr.201642195
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Oxidative Stress and Polymorphism of Xenobiotic-Metabolizing Enzymes in Two Patients with Severe Alpha-1-Antitrypsin Deficiency.

    Topic, Aleksandra / Nagorni-Obradovic, Ljudmila / Francuski, Djordje / Ljujic, Mila / Malic, Zivka / Radojkovic, Dragica

    Biochemical genetics

    2016  Volume 54, Issue 5, Page(s) 746–752

    Abstract: Alpha-1-antitrypsin deficiency (AATD) and tobacco smoke play a key role in the pathogenesis of early-onset emphysema. Differences in AATD-related chronic obstructive pulmonary disease stages imply the existence of modifying factors associated with ... ...

    Abstract Alpha-1-antitrypsin deficiency (AATD) and tobacco smoke play a key role in the pathogenesis of early-onset emphysema. Differences in AATD-related chronic obstructive pulmonary disease stages imply the existence of modifying factors associated with disease severity. We present two male patients with emphysema caused by severe AATD (PiZZ genotype). Both are former smokers and have epoxide hydrolase low-activity phenotype. Extremely high level of oxidative stress (high urinary 8-oxo-7,8-dihydro-2'-deoxyguanosine), increased inflammation (high serum CRP), and GSTP1 105Val mutation were found in patient with a worse lung function and prognosis. These data provide more evidence that oxidative stress-related gene variants and inflammation are associated with worse symptoms of AATD-related emphysema. Therefore, prevention against severe stage of AATD-related emphysema would include early identification of the risk gene variants, cessation or never smoking, and treatment with anti-inflammatory and anti-oxidant drugs. Additionally, urinary 8-oxodG could be a candidate for predictive biomarker for routine assessment of the oxidative stress level in AATD patients.
    MeSH term(s) Adult ; Age of Onset ; C-Reactive Protein/metabolism ; Glutathione S-Transferase pi/genetics ; Guanine/analogs & derivatives ; Guanine/urine ; Humans ; Male ; Middle Aged ; Mutation ; Oxidative Stress ; Prognosis ; alpha 1-Antitrypsin Deficiency/genetics ; alpha 1-Antitrypsin Deficiency/urine
    Chemical Substances Guanine (5Z93L87A1R) ; 8-oxo-7,8-dihydrodeoxyguanine (6957-76-2) ; C-Reactive Protein (9007-41-4) ; GSTP1 protein, human (EC 2.5.1.18) ; Glutathione S-Transferase pi (EC 2.5.1.18)
    Language English
    Publishing date 2016-10
    Publishing country United States
    Document type Case Reports ; Journal Article
    ZDB-ID 2168-4
    ISSN 1573-4927 ; 0006-2928
    ISSN (online) 1573-4927
    ISSN 0006-2928
    DOI 10.1007/s10528-016-9748-7
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Correction: Inhibition of IRE1α RNase activity reduces NLRP3 inflammasome assembly and processing of pro-IL1β.

    Talty, Aaron / Deegan, Shane / Ljujic, Mila / Mnich, Katarzyna / Naicker, Serika D / Quandt, Dagmar / Zeng, Qingping / Patterson, John B / Gorman, Adrienne M / Griffin, Matthew D / Samali, Afshin / Logue, Susan E

    Cell death & disease

    2020  Volume 11, Issue 1, Page(s) 12

    Abstract: An amendment to this paper has been published and can be accessed via a link at the top of the paper. ...

    Abstract An amendment to this paper has been published and can be accessed via a link at the top of the paper.
    Language English
    Publishing date 2020-01-06
    Publishing country England
    Document type Published Erratum
    ZDB-ID 2541626-1
    ISSN 2041-4889 ; 2041-4889
    ISSN (online) 2041-4889
    ISSN 2041-4889
    DOI 10.1038/s41419-019-2189-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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