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  1. Article: Editorial: Integrin adhesion receptors in health and disease.

    Kostourou, Vassiliki / Goult, Benjamin T / Ambriović-Ristov, Andreja

    Frontiers in cell and developmental biology

    2023  Volume 11, Page(s) 1149920

    Language English
    Publishing date 2023-02-14
    Publishing country Switzerland
    Document type Editorial
    ZDB-ID 2737824-X
    ISSN 2296-634X
    ISSN 2296-634X
    DOI 10.3389/fcell.2023.1149920
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: The ancestral type of the R-RAS protein has oncogenic potential.

    Talajić, Antea / Dominko, Kristina / Lončarić, Marija / Ambriović-Ristov, Andreja / Ćetković, Helena

    Cellular & molecular biology letters

    2024  Volume 29, Issue 1, Page(s) 27

    Abstract: Background: The R-RAS2 is a small GTPase highly similar to classical RAS proteins at the regulatory and signaling levels. The high evolutionary conservation of R-RAS2, its links to basic cellular processes and its role in cancer, make R-RAS2 an ... ...

    Abstract Background: The R-RAS2 is a small GTPase highly similar to classical RAS proteins at the regulatory and signaling levels. The high evolutionary conservation of R-RAS2, its links to basic cellular processes and its role in cancer, make R-RAS2 an interesting research topic. To elucidate the evolutionary history of R-RAS proteins, we investigated and compared structural and functional properties of ancestral type R-RAS protein with human R-RAS2.
    Methods: Bioinformatics analysis were used to elucidate the evolution of R-RAS proteins. Intrinsic GTPase activity of purified human and sponge proteins was analyzed with GTPase-Glo
    Results: We found that the single sponge R-RAS2-like gene/protein probably reflects the properties of the ancestral R-RAS protein that existed prior to duplications during the transition to Bilateria, and to Vertebrata. Biochemical characterization of sponge and human R-RAS2 showed that they have the same intrinsic GTPase activity and RNA binding properties. By testing cell proliferation, migration and colony forming efficiency in MDA-MB-231 human breast cancer cells, we showed that the ancestral type of the R-RAS protein, sponge R-RAS2-like, enhances their oncogenic potential, similar to human R-RAS2. In addition, sponge and human R-RAS2 were not found in focal adhesions, but both homologs play a role in their regulation by increasing talin1 and vinculin.
    Conclusions: This study suggests that the ancestor of all animals possessed an R-RAS2-like protein with oncogenic properties similar to evolutionarily more recent versions of the protein, even before the appearance of true tissue and the origin of tumors. Therefore, we have unraveled the evolutionary history of R-RAS2 in metazoans and improved our knowledge of R-RAS2 properties, including its structure, regulation and function.
    MeSH term(s) Animals ; Female ; Humans ; Breast Neoplasms/genetics ; Cell Proliferation ; Monomeric GTP-Binding Proteins/genetics ; Monomeric GTP-Binding Proteins/metabolism ; ras Proteins/genetics ; ras Proteins/metabolism ; Signal Transduction
    Chemical Substances Monomeric GTP-Binding Proteins (EC 3.6.5.2) ; ras Proteins (EC 3.6.5.2) ; RRAS protein, human (EC 3.6.1.-)
    Language English
    Publishing date 2024-02-21
    Publishing country England
    Document type Journal Article
    ZDB-ID 2108724-6
    ISSN 1689-1392 ; 1689-1392
    ISSN (online) 1689-1392
    ISSN 1689-1392
    DOI 10.1186/s11658-024-00546-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Waning immunity six months after BioNTech/Pfizer COVID-19 vaccination among nursing home residents in Zagreb, Croatia.

    Kolarić, Branko / Ambriović-Ristov, Andreja / Tabain, Irena / Vilibić-Čavlek, Tatjana

    Croatian medical journal

    2022  Volume 62, Issue 6, Page(s) 630–633

    Abstract: Aim: To assess the humoral immunity to COVID-19 in nursing home residents six months after vaccination.: Methods: This seroepidemiological research enrolled 118 residents of one nursing home in Zagreb. All participants received two doses of BioNTech/ ... ...

    Abstract Aim: To assess the humoral immunity to COVID-19 in nursing home residents six months after vaccination.
    Methods: This seroepidemiological research enrolled 118 residents of one nursing home in Zagreb. All participants received two doses of BioNTech/Pfizer COVID-19 and had no previously detected SARS-CoV-2 infection. The samples were tested for the presence of neutralizing antibodies using a virus neutralization test. A SARS-CoV-2 strain isolated in Vero E6 cells from a Croatian COVID-19 patient was used as a stock virus. Neutralizing antibody titer was defined as the reciprocal of the highest serum dilution that showed at least 50% neutralization. Neutralizing antibody titer ≥8 was considered positive.
    Results: Sixty-four (54%) participants had a positive neutralizing antibody titer, 27 (23%) had a low positive titer (titer 8), and 27 (23%) had a negative titer. Women had a significantly higher median titer than men (16 [interquartile range, IQR 24] vs 8 [IQR 12], Mann-Whitney U=1033, P=0.003). Age was negatively but not significantly correlated with neutralizing antibody titer (Spearman's rho -0.132, P=0.155).
    Conclusion: Almost half of the participants (46%) had a negative or low positive titer six months after having been fully vaccinated. This study suggests that humoral immunity among nursing home residents considerably wanes six months after BioNTech/Pfizer COVID-19 vaccination. Our results could contribute to the discussion about the need for a booster dose.
    MeSH term(s) COVID-19 ; COVID-19 Vaccines ; Croatia/epidemiology ; Female ; Humans ; Male ; Nursing Homes ; SARS-CoV-2 ; Vaccination
    Chemical Substances COVID-19 Vaccines
    Language English
    Publishing date 2022-01-03
    Publishing country Croatia
    Document type Journal Article
    ZDB-ID 1157623-6
    ISSN 1332-8166 ; 0353-9504
    ISSN (online) 1332-8166
    ISSN 0353-9504
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: NGR-bearing human adenovirus type 5 infects cells in flotillin- or caveolin-mediated manner depending on the NGR insertion site.

    Božinović, Ksenija / Nestić, Davor / Grellier, Elodie / Raddi, Najat / Cornilleau, Gaétan / Ambriović-Ristov, Andreja / Benihoud, Karim / Majhen, Dragomira

    Biomaterials advances

    2023  Volume 155, Page(s) 213681

    Abstract: Human adenoviruses represent attractive candidates for the design of cancer gene therapy vectors. Modification of adenovirus tropism by incorporating a targeting ligand into the adenovirus capsid proteins allows retargeting of adenovirus towards the ... ...

    Abstract Human adenoviruses represent attractive candidates for the design of cancer gene therapy vectors. Modification of adenovirus tropism by incorporating a targeting ligand into the adenovirus capsid proteins allows retargeting of adenovirus towards the cells of interest. Human adenovirus type 5 (HAdV-C5) bearing NGR containing peptide (CNGRCVSGCAGRC) inserted into the fiber (AdFNGR) or the hexon (AdHNGR) protein demonstrated an increased transduction of endothelial cells showing expression of aminopeptidase N, also known as CD13, and αvβ3 integrin both present on tumor vasculature, indicating that NGR-bearing adenoviruses could be used as tools for anti-angiogenic cancer therapy. Here we investigated how AdFNGR and AdHNGR infect cells lacking HAdV-C5 primary receptor, coxsackie and adenovirus receptor, and we showed that both AFNGR and AdHNGR enter cells by dynamin- and lipid raft-mediated endocytosis, while clathrin is not required for endocytosis of these viruses. We present evidence that productive infection of both AdFNGR and AdHNGR involves lipid rafts, with usage of flotillin-mediated cell entry for AdFNGR and limited role of caveolin in AdHNGR transduction efficiency. Lipid rafts play important role in angiogenesis and process of metastasis. Therefore, the ability of AdFNGR and AdHNGR to use lipid raft-dependent endocytosis, involving respectively flotillin- or caveolin-mediated pathway, could give them an advantage in targeting tumor cells lacking HAdV-C5 primary receptor.
    MeSH term(s) Humans ; Adenoviruses, Human/genetics ; Adenoviruses, Human/metabolism ; Cell Line ; Endothelial Cells/metabolism ; Caveolin 1/genetics ; Caveolin 1/metabolism ; Adenoviridae/genetics ; Adenoviridae/metabolism
    Chemical Substances flotillins ; Caveolin 1
    Language English
    Publishing date 2023-11-03
    Publishing country Netherlands
    Document type Journal Article
    ISSN 2772-9508
    ISSN (online) 2772-9508
    DOI 10.1016/j.bioadv.2023.213681
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Talin2 and KANK2 functionally interact to regulate microtubule dynamics, paclitaxel sensitivity and cell migration in the MDA-MB-435S melanoma cell line.

    Lončarić, Marija / Stojanović, Nikolina / Rac-Justament, Anja / Coopmans, Kaatje / Majhen, Dragomira / Humphries, Jonathan D / Humphries, Martin J / Ambriović-Ristov, Andreja

    Cellular & molecular biology letters

    2023  Volume 28, Issue 1, Page(s) 56

    Abstract: Background: Focal adhesions (FAs) are integrin-containing, multi-protein structures that link intracellular actin to the extracellular matrix and trigger multiple signaling pathways that control cell proliferation, differentiation, survival and motility. ...

    Abstract Background: Focal adhesions (FAs) are integrin-containing, multi-protein structures that link intracellular actin to the extracellular matrix and trigger multiple signaling pathways that control cell proliferation, differentiation, survival and motility. Microtubules (MTs) are stabilized in the vicinity of FAs through interaction with the components of the cortical microtubule stabilizing complex (CMSC). KANK (KN motif and ankyrin repeat domains) family proteins within the CMSC, KANK1 or KANK2, bind talin within FAs and thus mediate actin-MT crosstalk. We previously identified in MDA-MB-435S cells, which preferentially use integrin αVβ5 for adhesion, KANK2 as a key molecule enabling the actin-MT crosstalk. KANK2 knockdown also resulted in increased sensitivity to MT poisons, paclitaxel (PTX) and vincristine and reduced migration. Here, we aimed to analyze whether KANK1 has a similar role and to distinguish which talin isoform binds KANK2.
    Methods: The cell model consisted of human melanoma cell line MDA-MB-435S and stably transfected clone with decreased expression of integrin αV (3αV). For transient knockdown of talin1, talin2, KANK1 or KANK2 we used gene-specific siRNAs transfection. Using previously standardized protocol we isolated integrin adhesion complexes. SDS-PAGE and Western blot was used for protein expression analysis. The immunofluorescence analysis and live cell imaging was done using confocal microscopy. Cell migration was analyzed with Transwell Cell Culture Inserts. Statistical analysis using GraphPad Software consisted of either one-way analysis of variance (ANOVA), unpaired Student's t-test or two-way ANOVA analysis.
    Results: We show that KANK1 is not a part of the CMSC associated with integrin αVβ5 FAs and its knockdown did not affect the velocity of MT growth or cell sensitivity to PTX. The talin2 knockdown mimicked KANK2 knockdown i.e. led to the perturbation of actin-MT crosstalk, which is indicated by the increased velocity of MT growth and increased sensitivity to PTX and also reduced migration.
    Conclusion: We conclude that KANK2 functionally interacts with talin2 and that the mechanism of increased sensitivity to PTX involves changes in microtubule dynamics. These data elucidate a cell-type-specific role of talin2 and KANK2 isoforms and we propose that talin2 and KANK2 are therefore potential therapeutic targets for improved cancer therapy.
    MeSH term(s) Humans ; Actins/metabolism ; Adaptor Proteins, Signal Transducing/genetics ; Adaptor Proteins, Signal Transducing/metabolism ; Cell Movement ; Cytoskeletal Proteins/genetics ; Integrins/metabolism ; Melanoma ; Microtubules/metabolism ; Paclitaxel/pharmacology ; Protein Isoforms/metabolism ; Talin/genetics ; Talin/chemistry ; Talin/metabolism ; Cell Line, Tumor/metabolism
    Chemical Substances Actins ; Adaptor Proteins, Signal Transducing ; Cytoskeletal Proteins ; Integrins ; Paclitaxel (P88XT4IS4D) ; Protein Isoforms ; Talin ; Kank2 protein, human ; TLN2 protein, human
    Language English
    Publishing date 2023-07-17
    Publishing country England
    Document type Journal Article
    ZDB-ID 2108724-6
    ISSN 1689-1392 ; 1689-1392
    ISSN (online) 1689-1392
    ISSN 1689-1392
    DOI 10.1186/s11658-023-00473-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: KANK family proteins in cancer

    Tadijan, Ana / Samaržija, Ivana / Humphries, Jonathan D / Humphries, Martin J / Ambriović-Ristov, Andreja

    international journal of biochemistry & cell biology. 2021 Feb., v. 131

    2021  

    Abstract: The Kank (kidney or KN motif and ankyrin repeat domain-containing) family of proteins has been described as essential for crosstalk between actin and microtubules. Kank1, 2, 3 and 4 arose by gene duplication and diversification and share conserved ... ...

    Abstract The Kank (kidney or KN motif and ankyrin repeat domain-containing) family of proteins has been described as essential for crosstalk between actin and microtubules. Kank1, 2, 3 and 4 arose by gene duplication and diversification and share conserved structural domains. KANK proteins are localised mainly to the plasma membrane in focal adhesions, indirectly affecting RhoA and Rac1 thus regulating actin cytoskeleton. In addition, Kank proteins are part of the cortical microtubule stabilisation complex regulating microtubules. Most of the data have been collected for Kank1 protein whose expression promotes apoptosis and cell-cycle arrest while Kank3 was identified as hypoxia-inducible proapoptotic target of p53. A discrepancy in Kanks role in regulation of cell migration and sensitivity to antitumour drugs has been observed in different cell models. Since expression of Kank1 and 3 correlate positively with tumour progression and patient outcome, at least in some tumour types, they are candidates for tumour suppressors.
    Keywords actin ; apoptosis ; cell cycle checkpoints ; cell movement ; gene duplication ; kidneys ; microfilaments ; microtubules ; neoplasm progression ; neoplasms ; patients ; plasma membrane
    Language English
    Dates of publication 2021-02
    Publishing place Elsevier Ltd
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 1228429-4
    ISSN 1878-5875 ; 1357-2725
    ISSN (online) 1878-5875
    ISSN 1357-2725
    DOI 10.1016/j.biocel.2020.105903
    Database NAL-Catalogue (AGRICOLA)

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  7. Article: Integrin αvβ3 and disulfide bonds play important roles in NGR-retargeted adenovirus transduction efficiency

    Nestić, Davor / Hozić, Amela / Brkljača, Zlatko / Butorac, Ana / Pažur, Kristijan / Jullienne, Betsy / Cindrić, Mario / Ambriović-Ristov, Andreja / Benihoud, Karim / Majhen, Dragomira

    Life sciences. 2022 Feb. 15, v. 291

    2022  

    Abstract: Adenoviruses that have CNGRCVSGCAGRC peptide inserted into fiber (AdFNGR) or hexon (AdHNGR) protein, respectively, showed increased transduction of endothelial cells. In this study we investigated if cysteines within the CNGRCVSGCAGRC sequence inserted ... ...

    Abstract Adenoviruses that have CNGRCVSGCAGRC peptide inserted into fiber (AdFNGR) or hexon (AdHNGR) protein, respectively, showed increased transduction of endothelial cells. In this study we investigated if cysteines within the CNGRCVSGCAGRC sequence inserted into Ad serotype 5 Ad5 fiber or hexon protein form disulfide bond(s) and whether they play a role in retargeting potential of AdFNGR and AdHNGR. Transduction efficiency of adenoviruses was done by counting infected cells under the microscope. Adenovirus attachment and internalization were measured by qPCR. Flow cytometry was used to evaluate the expression of CD13 and integrins. Gene knockdown was achieved by transfection of small interfering RNA. Mass spectrometry was used for determining disulfide bonds in adenovirus fiber and hexon protein. Molecular modeling was use to predict interaction of CNGRCVSGCAGRC peptide and CD13. AdFNGR and AdHNGR attach better to CD13 and/or αvβ3 integrin-positive cells than Adwt. Reducing disulfide bonds using DTT decreased transduction efficiency and attachment of both AdFNGR and AdHNGR. Cysteins from CNGRCVSGCAGRC peptide within AdHNGR do not form disulfide bonds. Knockdown of αvβ3 integrin reduced increased transduction efficiency of both AdFNGR and AdHNGR, while CD13 knockdown had no effect, indicating that retargeting properties of these viruses rely mainly on αvβ3 integrin expression. Insertion site of NGR-containing peptides as well as NGR flanking residues are critical for receptor binding affinity/specificity and transduction efficiency of NGR retargeted adenoviral vectors.
    Keywords Adenoviridae ; disulfide bonds ; disulfides ; flow cytometry ; gene targeting ; integrins ; mass spectrometry ; peptides ; serotypes ; transfection
    Language English
    Dates of publication 2022-0215
    Publishing place Elsevier Inc.
    Document type Article
    ZDB-ID 3378-9
    ISSN 1879-0631 ; 0024-3205
    ISSN (online) 1879-0631
    ISSN 0024-3205
    DOI 10.1016/j.lfs.2021.120116
    Database NAL-Catalogue (AGRICOLA)

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  8. Article: Recent Advances and Prospects in the Research of Nascent Adhesions.

    Henning Stumpf, Bernd / Ambriović-Ristov, Andreja / Radenovic, Aleksandra / Smith, Ana-Sunčana

    Frontiers in physiology

    2020  Volume 11, Page(s) 574371

    Abstract: Nascent adhesions are submicron transient structures promoting the early adhesion of cells to the extracellular matrix. Nascent adhesions typically consist of several tens of integrins, and serve as platforms for the recruitment and activation of ... ...

    Abstract Nascent adhesions are submicron transient structures promoting the early adhesion of cells to the extracellular matrix. Nascent adhesions typically consist of several tens of integrins, and serve as platforms for the recruitment and activation of proteins to build mature focal adhesions. They are also associated with early stage signaling and the mechanoresponse. Despite their crucial role in sampling the local extracellular matrix, very little is known about the mechanism of their formation. Consequently, there is a strong scientific activity focused on elucidating the physical and biochemical foundation of their development and function. Precisely the results of this effort will be summarized in this article.
    Language English
    Publishing date 2020-12-04
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2564217-0
    ISSN 1664-042X
    ISSN 1664-042X
    DOI 10.3389/fphys.2020.574371
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: KANK family proteins in cancer.

    Tadijan, Ana / Samaržija, Ivana / Humphries, Jonathan D / Humphries, Martin J / Ambriović-Ristov, Andreja

    The international journal of biochemistry & cell biology

    2020  Volume 131, Page(s) 105903

    Abstract: The Kank (kidney or KN motif and ankyrin repeat domain-containing) family of proteins has been described as essential for crosstalk between actin and microtubules. Kank1, 2, 3 and 4 arose by gene duplication and diversification and share conserved ... ...

    Abstract The Kank (kidney or KN motif and ankyrin repeat domain-containing) family of proteins has been described as essential for crosstalk between actin and microtubules. Kank1, 2, 3 and 4 arose by gene duplication and diversification and share conserved structural domains. KANK proteins are localised mainly to the plasma membrane in focal adhesions, indirectly affecting RhoA and Rac1 thus regulating actin cytoskeleton. In addition, Kank proteins are part of the cortical microtubule stabilisation complex regulating microtubules. Most of the data have been collected for Kank1 protein whose expression promotes apoptosis and cell-cycle arrest while Kank3 was identified as hypoxia-inducible proapoptotic target of p53. A discrepancy in Kanks role in regulation of cell migration and sensitivity to antitumour drugs has been observed in different cell models. Since expression of Kank1 and 3 correlate positively with tumour progression and patient outcome, at least in some tumour types, they are candidates for tumour suppressors.
    MeSH term(s) Actin Cytoskeleton/drug effects ; Actin Cytoskeleton/metabolism ; Actin Cytoskeleton/ultrastructure ; Adaptor Proteins, Signal Transducing/chemistry ; Adaptor Proteins, Signal Transducing/genetics ; Adaptor Proteins, Signal Transducing/metabolism ; Antineoplastic Agents/therapeutic use ; Apoptosis/drug effects ; Carrier Proteins/chemistry ; Carrier Proteins/genetics ; Carrier Proteins/metabolism ; Cell Line, Tumor ; Cell Movement/drug effects ; Cell Proliferation/drug effects ; Cytoskeletal Proteins/chemistry ; Cytoskeletal Proteins/genetics ; Cytoskeletal Proteins/metabolism ; Focal Adhesions/drug effects ; Focal Adhesions/metabolism ; Focal Adhesions/pathology ; Gene Expression Regulation, Neoplastic ; Humans ; Microtubules/drug effects ; Microtubules/metabolism ; Microtubules/ultrastructure ; Neoplasms/drug therapy ; Neoplasms/genetics ; Neoplasms/metabolism ; Neoplasms/pathology ; Paclitaxel/therapeutic use ; Protein Domains ; Signal Transduction ; Treatment Outcome ; Vincristine/therapeutic use
    Chemical Substances Adaptor Proteins, Signal Transducing ; Antineoplastic Agents ; Carrier Proteins ; Cytoskeletal Proteins ; KANK1 protein, human ; KANK3 protein, human ; Vincristine (5J49Q6B70F) ; Paclitaxel (P88XT4IS4D)
    Language English
    Publishing date 2020-12-10
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 1228429-4
    ISSN 1878-5875 ; 1357-2725
    ISSN (online) 1878-5875
    ISSN 1357-2725
    DOI 10.1016/j.biocel.2020.105903
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Book ; Online: Recent Advances and Prospects in the Research of Nascent Adhesions

    Stumpf, Henning / Ambriović-Ristov, Andreja / Radenovic, Aleksandra / Smith, Ana-Sunčana

    2020  

    Abstract: Nascent adhesions are submicron transient structures promoting the early adhesion of cells to the extracellular matrix. Nascent adhesions typically consist of several tens of integrins, and serve as platforms for the recruitment and activation of ... ...

    Abstract Nascent adhesions are submicron transient structures promoting the early adhesion of cells to the extracellular matrix. Nascent adhesions typically consist of several tens of integrins, and serve as platforms for the recruitment and activation of proteins to build mature focal adhesions. They are also associated with early stage signalling and the mechanoresponse. Despite their crucial role in sampling the local extracellular matrix, very little is known about the mechanism of their formation. Consequently, there is a strong scientific activity focused on elucidating the physical and biochemical foundation of their development and function. Precisely the results of this effort will be summarized in this article.

    Comment: 38 pages, 2 figures, review article
    Keywords Quantitative Biology - Subcellular Processes ; Physics - Biological Physics
    Publishing date 2020-07-27
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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