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  1. Article ; Online: The importance of being CAFs (in cancer resistance to targeted therapies).

    Rizzolio, Sabrina / Giordano, Silvia / Corso, Simona

    Journal of experimental & clinical cancer research : CR

    2022  Volume 41, Issue 1, Page(s) 319

    Abstract: In the last two decades, clinical oncology has been revolutionized by the advent of targeted drugs. However, the efficacy of these therapies is significantly limited by primary and acquired resistance, that relies not only on cell-autonomous mechanisms ... ...

    Abstract In the last two decades, clinical oncology has been revolutionized by the advent of targeted drugs. However, the efficacy of these therapies is significantly limited by primary and acquired resistance, that relies not only on cell-autonomous mechanisms but also on tumor microenvironment cues. Cancer-associated fibroblasts (CAFs) are extremely plastic cells of the tumor microenvironment. They not only produce extracellular matrix components that build up the structure of tumor stroma, but they also release growth factors, chemokines, exosomes, and metabolites that affect all tumor properties, including response to drug treatment. The contribution of CAFs to tumor progression has been deeply investigated and reviewed in several works. However, their role in resistance to anticancer therapies, and in particular to molecular therapies, has been largely overlooked. This review specifically dissects the role of CAFs in driving resistance to targeted therapies and discusses novel CAF targeted therapeutic strategies to improve patient survival.
    MeSH term(s) Humans ; Cancer-Associated Fibroblasts/metabolism ; Neoplasms/drug therapy ; Neoplasms/genetics ; Neoplasms/metabolism ; Tumor Microenvironment ; Exosomes/metabolism
    Language English
    Publishing date 2022-11-03
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 803138-1
    ISSN 1756-9966 ; 0392-9078
    ISSN (online) 1756-9966
    ISSN 0392-9078
    DOI 10.1186/s13046-022-02524-w
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Autocrine Signaling of NRP1 Ligand Galectin-1 Elicits Resistance to BRAF-Targeted Therapy in Melanoma Cells.

    Rizzolio, Sabrina / Corso, Simona / Giordano, Silvia / Tamagnone, Luca

    Cancers

    2020  Volume 12, Issue 8

    Abstract: Melanoma cells addicted to mutated BRAF oncogene activity can be targeted by specific kinase inhibitors until they develop resistance to therapy. We observed that the expression of Galectin-1 (Gal-1), a soluble ligand of Neuropilin-1 (NRP1), is ... ...

    Abstract Melanoma cells addicted to mutated BRAF oncogene activity can be targeted by specific kinase inhibitors until they develop resistance to therapy. We observed that the expression of Galectin-1 (Gal-1), a soluble ligand of Neuropilin-1 (NRP1), is upregulated in melanoma tumor samples and melanoma cells resistant to BRAF-targeted therapy. We then demonstrated that Gal-1 is a novel driver of resistance to BRAF inhibitors in melanoma and that its activity is linked to the concomitant upregulation of the NRP1 receptor observed in drug-resistant cells. Mechanistically, Gal-1 sustains increased expression of NRP1 and EGFR in drug-resistant melanoma cells. Moreover, consistent with its role as a NRP1 ligand, Gal-1 negatively controls p27 levels, a mechanism previously found to enable EGFR upregulation in cancer cells. Finally, the combined treatment with a Gal-1 inhibitor and a NRP1 blocking drug enabled resistant melanoma cell resensitization to BRAF-targeted therapy. In summary, we found that the activation of Galectin-1/NRP1 autocrine signaling is a new mechanism conferring independence from BRAF kinase activity to oncogene-addicted melanoma cells.
    Language English
    Publishing date 2020-08-08
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2527080-1
    ISSN 2072-6694
    ISSN 2072-6694
    DOI 10.3390/cancers12082218
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Antibody-Feeding Assay: A Method to Track the Internalization of Neuropilin-1 and Other Cell Surface Receptors.

    Rizzolio, Sabrina / Tamagnone, Luca

    Methods in molecular biology (Clifton, N.J.)

    2017  Volume 1493, Page(s) 311–319

    Abstract: Ligand-induced endocytosis of receptors exposed on the plasma membrane is a fundamental regulatory step for their functional activation and interaction with intracellular signal transducers. Thus, elucidating the timing of endocytosis and tracing the ... ...

    Abstract Ligand-induced endocytosis of receptors exposed on the plasma membrane is a fundamental regulatory step for their functional activation and interaction with intracellular signal transducers. Thus, elucidating the timing of endocytosis and tracing the intracellular fate of receptors is instrumental to understand their signaling cascade in different conditions. Here we describe an assay for the study of endocytosis and intracellular trafficking of individual surface receptors, in living cells subject to different experimental challenges. We applied this method for studying the functional interaction between semaphorin coreceptor Neuropilin-1 and a tyrosine kinase receptor exposed on the cell surface.
    Language English
    Publishing date 2017
    Publishing country United States
    Document type Journal Article
    ISSN 1940-6029
    ISSN (online) 1940-6029
    DOI 10.1007/978-1-4939-6448-2_23
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Autocrine Signaling of NRP1 Ligand Galectin-1 Elicits Resistance to BRAF-Targeted Therapy in Melanoma Cells

    Sabrina Rizzolio / Simona Corso / Silvia Giordano / Luca Tamagnone

    Cancers, Vol 12, Iss 2218, p

    2020  Volume 2218

    Abstract: Melanoma cells addicted to mutated BRAF oncogene activity can be targeted by specific kinase inhibitors until they develop resistance to therapy. We observed that the expression of Galectin-1 (Gal-1), a soluble ligand of Neuropilin-1 (NRP1), is ... ...

    Abstract Melanoma cells addicted to mutated BRAF oncogene activity can be targeted by specific kinase inhibitors until they develop resistance to therapy. We observed that the expression of Galectin-1 (Gal-1), a soluble ligand of Neuropilin-1 (NRP1), is upregulated in melanoma tumor samples and melanoma cells resistant to BRAF-targeted therapy. We then demonstrated that Gal-1 is a novel driver of resistance to BRAF inhibitors in melanoma and that its activity is linked to the concomitant upregulation of the NRP1 receptor observed in drug-resistant cells. Mechanistically, Gal-1 sustains increased expression of NRP1 and EGFR in drug-resistant melanoma cells. Moreover, consistent with its role as a NRP1 ligand, Gal-1 negatively controls p27 levels, a mechanism previously found to enable EGFR upregulation in cancer cells. Finally, the combined treatment with a Gal-1 inhibitor and a NRP1 blocking drug enabled resistant melanoma cell resensitization to BRAF-targeted therapy. In summary, we found that the activation of Galectin-1/NRP1 autocrine signaling is a new mechanism conferring independence from BRAF kinase activity to oncogene-addicted melanoma cells.
    Keywords galectin ; neuropilin ; melanoma ; cancer therapy ; molecular biology ; cell signaling ; Neoplasms. Tumors. Oncology. Including cancer and carcinogens ; RC254-282
    Language English
    Publishing date 2020-08-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: SEMA6C: a novel adhesion-independent FAK and YAP activator, required for cancer cell viability and growth.

    Fard, Damon / Testa, Erika / Panzeri, Valentina / Rizzolio, Sabrina / Bianchetti, Giada / Napolitano, Virginia / Masciarelli, Silvia / Fazi, Francesco / Maulucci, Giuseppe / Scicchitano, Bianca Maria / Sette, Claudio / Viscomi, Maria Teresa / Tamagnone, Luca

    Cellular and molecular life sciences : CMLS

    2023  Volume 80, Issue 4, Page(s) 111

    Abstract: Transmembrane semaphorins are signaling molecules, controlling axonal wiring and embryo development, which are increasingly implicated in human diseases. Semaphorin 6C (Sema6C) is a poorly understood family member and its functional role is still unclear. ...

    Abstract Transmembrane semaphorins are signaling molecules, controlling axonal wiring and embryo development, which are increasingly implicated in human diseases. Semaphorin 6C (Sema6C) is a poorly understood family member and its functional role is still unclear. Upon targeting Sema6C expression in a range of cancer cells, we observed dramatic growth suppression, decreased ERK phosphorylation, upregulation of cell cycle inhibitor proteins p21, p27 and p53, and the onset of cell senescence, associated with activation of autophagy. These data are consistent with a fundamental requirement for Sema6C to support viability and growth in cancer cells. Mechanistically, we unveiled a novel signaling pathway elicited by Sema6C, and dependent on its intracellular domain, mediated by tyrosine kinases c-Abl and Focal Adhesion Kinase (FAK). Sema6C was found in complex with c-Abl, and induced its phosphorylation, which in turn led to FAK activation, independent of cell-matrix adhesion. Sema6C-induced FAK activity was furthermore responsible for increased nuclear localization of YAP transcriptional regulator. Moreover, Sema6C conferred YAP signaling-dependent long-term cancer cell survival upon nutrient deprivation. In conclusion, our findings demonstrate that Sema6C elicits a cancer promoting-signaling pathway sustaining cell viability and self-renewal, independent of growth factors and nutrients availability.
    MeSH term(s) Humans ; Focal Adhesion Protein-Tyrosine Kinases/metabolism ; Cell Survival ; Focal Adhesion Kinase 1/genetics ; Focal Adhesion Kinase 1/metabolism ; Signal Transduction ; Phosphorylation ; Cell Cycle Proteins/metabolism ; Neoplasms/genetics
    Chemical Substances Focal Adhesion Protein-Tyrosine Kinases (EC 2.7.10.2) ; Focal Adhesion Kinase 1 (EC 2.7.10.2) ; Cell Cycle Proteins
    Language English
    Publishing date 2023-03-31
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1358415-7
    ISSN 1420-9071 ; 1420-682X
    ISSN (online) 1420-9071
    ISSN 1420-682X
    DOI 10.1007/s00018-023-04756-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Distinct Mechanisms Are Responsible for Nrf2-Keap1 Pathway Activation at Different Stages of Rat Hepatocarcinogenesis.

    Orrù, Claudia / Perra, Andrea / Kowalik, Marta Anna / Rizzolio, Sabrina / Puliga, Elisabetta / Cabras, Lavinia / Giordano, Silvia / Columbano, Amedeo

    Cancers

    2020  Volume 12, Issue 8

    Abstract: Activation of the Nrf2-Keap1 pathway, the main intracellular defense against environmental stress, has been observed in several human cancers, including hepatocellular carcinoma (HCC). Here, we assessed whether distinct mechanisms of activation may be ... ...

    Abstract Activation of the Nrf2-Keap1 pathway, the main intracellular defense against environmental stress, has been observed in several human cancers, including hepatocellular carcinoma (HCC). Here, we assessed whether distinct mechanisms of activation may be involved at different stages of hepatocarcinogenesis. We adopted an experimental model consisting of treatment with diethylnitrosamine (DENA) followed by a choline-devoid methionine-deficient (CMD) diet for 4 months. The CMD diet was then replaced with a basal diet, and the animals were killed at 6, 10 or 13 months after DENA injection. Nrf2 activation occurred at early steps of hepatocarcinogenesis and persisted throughout the tumorigenic process. While
    Language English
    Publishing date 2020-08-16
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2527080-1
    ISSN 2072-6694
    ISSN 2072-6694
    DOI 10.3390/cancers12082305
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: SEMA6C: a novel adhesion-independent FAK and YAP activator, required for cancer cell viability and growth

    Fard, Damon / Testa, Erika / Panzeri, Valentina / Rizzolio, Sabrina / Bianchetti, Giada / Napolitano, Virginia / Masciarelli, Silvia / Fazi, Francesco / Maulucci, Giuseppe / Scicchitano, Bianca Maria / Sette, Claudio / Viscomi, Maria Teresa / Tamagnone, Luca

    Cell. Mol. Life Sci.. 2023 Apr., v. 80, no. 4 p.111-111

    2023  

    Abstract: Transmembrane semaphorins are signaling molecules, controlling axonal wiring and embryo development, which are increasingly implicated in human diseases. Semaphorin 6C (Sema6C) is a poorly understood family member and its functional role is still unclear. ...

    Abstract Transmembrane semaphorins are signaling molecules, controlling axonal wiring and embryo development, which are increasingly implicated in human diseases. Semaphorin 6C (Sema6C) is a poorly understood family member and its functional role is still unclear. Upon targeting Sema6C expression in a range of cancer cells, we observed dramatic growth suppression, decreased ERK phosphorylation, upregulation of cell cycle inhibitor proteins p21, p27 and p53, and the onset of cell senescence, associated with activation of autophagy. These data are consistent with a fundamental requirement for Sema6C to support viability and growth in cancer cells. Mechanistically, we unveiled a novel signaling pathway elicited by Sema6C, and dependent on its intracellular domain, mediated by tyrosine kinases c-Abl and Focal Adhesion Kinase (FAK). Sema6C was found in complex with c-Abl, and induced its phosphorylation, which in turn led to FAK activation, independent of cell–matrix adhesion. Sema6C-induced FAK activity was furthermore responsible for increased nuclear localization of YAP transcriptional regulator. Moreover, Sema6C conferred YAP signaling-dependent long-term cancer cell survival upon nutrient deprivation. In conclusion, our findings demonstrate that Sema6C elicits a cancer promoting-signaling pathway sustaining cell viability and self-renewal, independent of growth factors and nutrients availability.
    Keywords autophagy ; cell adhesion ; cell cycle ; cell senescence ; cell viability ; embryogenesis ; humans ; neoplasm cells ; non-specific protein-tyrosine kinase ; phosphorylation ; transcription factors ; tyrosine
    Language English
    Dates of publication 2023-04
    Size p. 111.
    Publishing place Springer International Publishing
    Document type Article ; Online
    ZDB-ID 1358415-7
    ISSN 1420-9071 ; 1420-682X
    ISSN (online) 1420-9071
    ISSN 1420-682X
    DOI 10.1007/s00018-023-04756-1
    Database NAL-Catalogue (AGRICOLA)

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  8. Article ; Online: Downregulating Neuropilin-2 Triggers a Novel Mechanism Enabling EGFR-Dependent Resistance to Oncogene-Targeted Therapies.

    Rizzolio, Sabrina / Battistini, Chiara / Cagnoni, Gabriella / Apicella, Maria / Vella, Viviana / Giordano, Silvia / Tamagnone, Luca

    Cancer research

    2017  Volume 78, Issue 4, Page(s) 1058–1068

    Abstract: Neuropilins are a class of cell surface proteins implicated in cell migration and angiogenesis, with aberrant expression in human tumors. Here, we show that the expression of Neuropilin-2 (NRP2) controls EGFR protein levels, thereby impinging on ... ...

    Abstract Neuropilins are a class of cell surface proteins implicated in cell migration and angiogenesis, with aberrant expression in human tumors. Here, we show that the expression of Neuropilin-2 (NRP2) controls EGFR protein levels, thereby impinging on intracellular signaling, viability, and response to targeted therapies of oncogene-addicted cells. Notably, increased NRP2 expression in EGFR-addicted tumor cells led to downregulation of EGFR protein and tumor cell growth inhibition. NRP2 also blunted upregulation of an EGFR "rescue" pathway induced by targeted therapy in Met-addicted carcinoma cells. Cancer cells acquiring resistance to MET oncogene-targeted drugs invariably underwent NRP2 loss, a step required for EGFR upregulation. Mechanistic investigations revealed that NRP2 loss activated NFkB and upregulated the EGFR-associated protein KIAA1199/CEMIP, which is known to oppose the degradation of activated EGFR kinase. Notably, KIAA1199 silencing in oncogene-addicted tumor cells improved therapeutic responses and counteracted acquired drug resistance. Our findings define NRP2 as the pivotal switch of a novel broad-acting and actionable pathway controlling EGFR signaling, and driving resistance to therapies targeting oncogene-addiction.
    MeSH term(s) Cell Line, Tumor ; Cell Proliferation ; Down-Regulation ; Humans ; Neuropilin-2/genetics ; Neuropilin-2/metabolism ; Oncogenes ; Signal Transduction
    Chemical Substances Neuropilin-2 ; neuropilin-2, human
    Language English
    Publishing date 2017-12-11
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1432-1
    ISSN 1538-7445 ; 0008-5472
    ISSN (online) 1538-7445
    ISSN 0008-5472
    DOI 10.1158/0008-5472.CAN-17-2020
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: BRCA2 Germline Mutations Identify Gastric Cancers Responsive to PARP Inhibitors.

    Petrelli, Annalisa / Rizzolio, Sabrina / Pietrantonio, Filippo / Bellomo, Sara E / Benelli, Matteo / De Cecco, Loris / Romagnoli, Dario / Berrino, Enrico / Orrù, Claudia / Ribisi, Salvatore / Moya-Rull, Daniel / Migliore, Cristina / Conticelli, Daniela / Maina, Irene M / Puliga, Elisabetta / Serra, Violeta / Pellegrino, Benedetta / Llop-Guevara, Alba / Musolino, Antonino /
    Siena, Salvatore / Sartore-Bianchi, Andrea / Prisciandaro, Michele / Morano, Federica / Antista, Maria / Fumagalli, Uberto / De Manzoni, Giovanni / Degiuli, Maurizio / Baiocchi, Gian Luca / Amisano, Marco F / Ferrero, Alessandro / Marchiò, Caterina / Corso, Simona / Giordano, Silvia

    Cancer research

    2023  Volume 83, Issue 10, Page(s) 1699–1710

    Abstract: Despite negative results of clinical trials conducted on the overall population of patients with gastric cancer, PARP inhibitor (PARPi) therapeutic strategy still might represent a window of opportunity for a subpopulation of patients with gastric cancer. ...

    Abstract Despite negative results of clinical trials conducted on the overall population of patients with gastric cancer, PARP inhibitor (PARPi) therapeutic strategy still might represent a window of opportunity for a subpopulation of patients with gastric cancer. An estimated 7% to 12% of gastric cancers exhibit a mutational signature associated with homologous recombination (HR) failure, suggesting that these patients could potentially benefit from PARPis. To analyze responsiveness of gastric cancer to PARPi, we exploited a gastroesophageal adenocarcinoma (GEA) platform of patient-derived xenografts (PDX) and PDX-derived primary cells and selected 10 PDXs with loss-of-function mutations in HR pathway genes. Cell viability assays and preclinical trials showed that olaparib treatment was effective in PDXs harboring BRCA2 germline mutations and somatic inactivation of the second allele. Olaparib responsive tumors were sensitive to oxaliplatin as well. Evaluation of HR deficiency (HRD) and mutational signatures efficiently stratified responder and nonresponder PDXs. A retrospective analysis on 57 patients with GEA showed that BRCA2 inactivating variants were associated with longer progression-free survival upon platinum-based regimens. Five of 7 patients with BRCA2 germline mutations carried the p.K3326* variant, classified as "benign." However, familial history of cancer, the absence of RAD51 foci in tumor cells, and a high HRD score suggest a deleterious effect of this mutation in gastric cancer. In conclusion, PARPis could represent an effective therapeutic option for BRCA2-mutated and/or high HRD score patients with GEA, including patients with familial intestinal gastric cancer.
    Significance: PARP inhibition is a potential strategy for treating patients with gastric cancer with mutated BRCA2 or homologous repair deficiency, including patients with familial intestinal gastric cancer, for whom BRCA2 germline testing should be recommended.
    MeSH term(s) Humans ; Female ; Poly(ADP-ribose) Polymerase Inhibitors/pharmacology ; Poly(ADP-ribose) Polymerase Inhibitors/therapeutic use ; Germ-Line Mutation ; Stomach Neoplasms/drug therapy ; Stomach Neoplasms/genetics ; Retrospective Studies ; BRCA1 Protein/genetics ; BRCA2 Protein/genetics ; Antineoplastic Agents/pharmacology ; Antineoplastic Agents/therapeutic use ; Ovarian Neoplasms/drug therapy
    Chemical Substances Poly(ADP-ribose) Polymerase Inhibitors ; BRCA1 Protein ; BRCA2 Protein ; Antineoplastic Agents ; BRCA2 protein, human
    Language English
    Publishing date 2023-05-31
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1432-1
    ISSN 1538-7445 ; 0008-5472
    ISSN (online) 1538-7445
    ISSN 0008-5472
    DOI 10.1158/0008-5472.CAN-22-2620
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Semaphorin signals on the road to cancer invasion and metastasis.

    Rizzolio, Sabrina / Tamagnone, Luca

    Cell adhesion & migration

    2007  Volume 1, Issue 2, Page(s) 62–68

    Abstract: Semaphorins are a large family of secreted and membrane-bound molecules initially implicated in the development of the nervous system and in axon guidance. More recently, they have been found to regulate cell adhesion and cell motility, angiogenesis, ... ...

    Abstract Semaphorins are a large family of secreted and membrane-bound molecules initially implicated in the development of the nervous system and in axon guidance. More recently, they have been found to regulate cell adhesion and cell motility, angiogenesis, immune function and tumour progression. Notably, Semaphorins have been implicated with opposite functions in cancer: either as putative tumor suppressors and anti-angiogenic factors, or as mediating tumour angiogenesis, invasion and metastasis. Interestingly, Semaphorins may display divergent activities in different cell types. These multifaceted functions may be explained by the involvement of different kinds of semaphorin receptor complexes, and by the consequent activation of multiple signaling pathways, in different cells or different functional stages. Semaphorin signaling is largely mediated by the Plexins. However, semaphorin receptor complexes may also include Neuropilins and tyrosine kinases implicated in cancer. In this review, we will focus on major open questions concerning the potential role of Semaphorin signals in cancer.
    MeSH term(s) Animals ; Humans ; Neoplasm Invasiveness ; Neoplasm Metastasis ; Receptors, Cell Surface/metabolism ; Semaphorins/genetics ; Semaphorins/metabolism ; Signal Transduction
    Chemical Substances Receptors, Cell Surface ; Semaphorins
    Language English
    Publishing date 2007-04-13
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 2268518-2
    ISSN 1933-6926 ; 1933-6918
    ISSN (online) 1933-6926
    ISSN 1933-6918
    DOI 10.4161/cam.1.2.4570
    Database MEDical Literature Analysis and Retrieval System OnLINE

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