1
|
Di Nardo P, Basile D, Siciliano A, Pelizzari G, Corvaja C, Buriolla S, Ongaro E, Maria Grazia D, Garattini SK, Foltran L, Guardascione M, Casagrande M, Buonadonna A, Prantera T, Aprile G, Puglisi F. Second-line treatment strategies for RAS wild-type colorectal cancer: A systematic review and Network Meta-analysis (NMA). Dig Liver Dis 2024; 56:786-794. [PMID: 37586908 DOI: 10.1016/j.dld.2023.07.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 07/07/2023] [Accepted: 07/10/2023] [Indexed: 08/18/2023]
Abstract
BACKGROUND The optimal strategy for second-line (IIL) treatment in KRAS wt metastatic colorectal cancer (mCRC) is not determined yet. METHODS A random-effect NMA of phase II/III RCTs was conducted to evaluate IIL treatment for all-RAS wt mCRC, comparing anti-EGFR or anti-VEGF, and chemotherapy (CT). RESULTS Overall, 11 RCTs (3613 patients) were included. In KRAS wt patients, PFS was improved with anti-VEGF (HR 0.43) and anti-EGFR (HR 0.63) vs CT. However, anti-VEGF based therapy had the highest likelihood of being ranked as the best treatment in terms of PFS (SUCRA 99.3%) and OS (SUCRA 99.4%). Bevacizumab-based treatment is most likely to be the best treatment in terms of PFS (SUCRA 89.1%) and OS (SUCRA 86.7%). CONCLUSIONS Second line treatment with anti-VEGF and anti-EGFR improved PFS in mCRC patients, however, anti-VEGF based therapy, particularly CT plus bevacizumab, is the best treatment according to SUCRA in terms of PFS and OS.
Collapse
Affiliation(s)
- P Di Nardo
- Department of Medical Oncology, Centro di Riferimento Oncologico (CRO), IRCCS, Aviano, Italy
| | - D Basile
- Unit of Medical Oncology, Lamezia Terme Hospital, Italy.
| | - A Siciliano
- Unit of Medical Oncology, AO Pugliese-Ciaccio of Catanzaro, Italy
| | - G Pelizzari
- Department of Oncology, University Hospital of Udine, Italy
| | - C Corvaja
- Department of Medicine, University of Udine, Udine, Italy
| | - S Buriolla
- Department of Medicine, University of Udine, Udine, Italy
| | - E Ongaro
- Department of Medical Oncology, Centro di Riferimento Oncologico (CRO), IRCCS, Aviano, Italy
| | | | - S K Garattini
- Department of Oncology, University Hospital of Udine, Italy
| | - L Foltran
- Department of Medical Oncology, Centro di Riferimento Oncologico (CRO), IRCCS, Aviano, Italy
| | - M Guardascione
- Department of Medical Oncology, Centro di Riferimento Oncologico (CRO), IRCCS, Aviano, Italy
| | - M Casagrande
- Department of Oncology, University Hospital of Udine, Italy
| | - A Buonadonna
- Department of Medical Oncology, Centro di Riferimento Oncologico (CRO), IRCCS, Aviano, Italy
| | - T Prantera
- Unit of Medical Oncology, Lamezia Terme Hospital, Italy
| | - G Aprile
- Medical Oncology, ULSS 8 Berica, Vicenza, Italy
| | - F Puglisi
- Department of Medical Oncology, Centro di Riferimento Oncologico (CRO), IRCCS, Aviano, Italy; Department of Medicine, University of Udine, Udine, Italy
| |
Collapse
|
2
|
Uliano J, Corvaja C, Curigliano G, Tarantino P. Targeting HER3 for cancer treatment: a new horizon for an old target. ESMO Open 2023; 8:100790. [PMID: 36764093 PMCID: PMC9929675 DOI: 10.1016/j.esmoop.2023.100790] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 01/09/2023] [Accepted: 01/10/2023] [Indexed: 02/11/2023] Open
Abstract
Human epidermal growth factor receptor 3 (HER3) is a member of the human epidermal growth factor receptors family, having as its main ligands neuregulins 1 and 2. Although its poor tyrosine kinase activity entails a weak oncogenic power on its own, HER3 can heterodimerize with HER2 and/or epidermal growth factor receptor (EGFR), leading to a drastic enhancement of transphosphorylation and activation of downstream signaling pathways, ultimately promoting oncogenesis, metastatic dissemination, and drug resistance. Given its ubiquitous expression across solid tumors, multiple efforts have been done to therapeutically target HER3 by blocking either the ligand binding domain or its dimerization with other receptors. Treatment with anti-HER3 monoclonal antibodies or bispecific antibodies, both as single agents and in combination with other compounds, unfortunately led to unsatisfactory results across several tumor types. The HER3-directed delivery of cytotoxic payloads through antibody-drug conjugates has recently demonstrated encouraging activity in several tumor types, however, suggesting a potential role for the therapeutic targeting of HER3 in cancer treatment.
Collapse
Affiliation(s)
- J Uliano
- Division of New Drugs and Early Drug Development, European Institute of Oncology IRCCS, Milan; Department of Oncology and Hemato-Oncology, University of Milan, Milan. https://twitter.com/jacopo_uli
| | - C Corvaja
- Division of New Drugs and Early Drug Development, European Institute of Oncology IRCCS, Milan; Department of Oncology and Hemato-Oncology, University of Milan, Milan; Department of Medicine, University of Udine, Udine, Italy. https://twitter.com/carlacorvaja
| | - G Curigliano
- Division of New Drugs and Early Drug Development, European Institute of Oncology IRCCS, Milan; Department of Oncology and Hemato-Oncology, University of Milan, Milan. https://twitter.com/curijoey
| | - P Tarantino
- Division of New Drugs and Early Drug Development, European Institute of Oncology IRCCS, Milan; Department of Oncology and Hemato-Oncology, University of Milan, Milan; Breast Oncology Program, Dana-Farber Brigham Cancer Center, Boston; Harvard Medical School, Boston, USA.
| |
Collapse
|
3
|
Pelizzari G, Targato G, Corvaja C, Fantin A, De Maglio G, Rossetto C, Rizzato S, Fasola G, Follador A. P10.02 Improved Survival of Elderly Patients with NSCLC Treated in the Immunotherapy Era: A Historical Cohort Study. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
4
|
Pelizzari G, Corvaja C, Targato G, Buriolla S, Bortolot M, Torresan S, Fantin A, De Maglio G, Rossetto C, Rizzato S, Fasola G, Follador A. 1312P Prognostic impact of KRAS status in patients with non-small cell lung cancer (NSCLC) treated with immune checkpoint inhibitor monotherapy. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1914] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
|
5
|
Pelizzari G, Bertoli E, Basile D, Giavarra M, Gerratana L, Bartoletti M, Lisanti C, Corvaja C, Vitale M, Michelotti A, Avoledo D, Ros L, Bonotto M, Bolzonello S, Di Nardo P, Fasola G, Mansutti M, Spazzapan S, Minisini A, Puglisi F. Lactate dehydrogenase as a prognostic biomarker in patients with hormone receptor-positive metastatic breast cancer treated with palbociclib: An exploratory cohort study. Eur J Cancer 2020. [DOI: 10.1016/s0959-8049(20)30695-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
6
|
Basile D, Polano M, Buriolla S, Gallois C, Cortiula F, Corvaja C, De Scordilli M, Michelotti A, Pelizzari G, Ongaro E, Casagrande M, Foltran L, Toffoli G, Pella N, Buonadonna A, Zaanan A, Fasola G, Aprile G, Taieb J, Puglisi F. 416P A novel prognostic tool based on lymphocyte ratios in patients with stage III colon cancer. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
|
7
|
Garattini S, Minisini A, Valent F, Riosa C, Zara D, Giavarra M, Corvaja C, Palmero L, Noto C, Fasola G. 1613P_PR An estimate of the 2-year oncology workload generated by each new patient: A real-world study. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.2302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
|
8
|
Corvaja C, Garutti M, Gerratana L, Pelizzari G, Puglisi F. Hype or hope? The strange case of platinum salts' renaissance in breast cancer. Expert Rev Anticancer Ther 2019; 19:1005-1008. [PMID: 31775005 DOI: 10.1080/14737140.2019.1699066] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- C Corvaja
- Department of Medical Oncology, Centro di Riferimento Oncologico (CRO), IRCCS, Aviano, PN, Italy.,Department of Medicine (DAME), University of Udine, Udine, Italy
| | - M Garutti
- Department of Medical Oncology, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Roma, Italy
| | - L Gerratana
- Department of Medical Oncology, Centro di Riferimento Oncologico (CRO), IRCCS, Aviano, PN, Italy.,Department of Medicine (DAME), University of Udine, Udine, Italy
| | - G Pelizzari
- Department of Medical Oncology, Centro di Riferimento Oncologico (CRO), IRCCS, Aviano, PN, Italy.,Department of Medicine (DAME), University of Udine, Udine, Italy
| | - F Puglisi
- Department of Medical Oncology, Centro di Riferimento Oncologico (CRO), IRCCS, Aviano, PN, Italy.,Department of Medicine (DAME), University of Udine, Udine, Italy
| |
Collapse
|
9
|
Lisanti C, Basile D, Garattini S, Parnofiello A, Corvaja C, Cortiula F, Pelizzari G, Cattaneo M, Andreotti V, Bertoli E, Ongaro E, Iacono D, Foltran L, Casagrande M, Miolo G, Cardellino G, Fasola G, Pella N, Buonadonna A, Puglisi F. The SAFFO study: Sex-related prognostic role and cut-oFf deFinition of monocyte-to-lymphocyte ratio (MLR) in metastatic colOrectal cancer. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz246.088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
10
|
Garattini S, Bonotto M, Basile D, Porcu L, Ongaro E, Gerratana L, Cortiula F, Pelizzari G, Parnofiello A, bertoli E, Corvaja C, Lisanti C, Casagrande M, Iacono D, Cardellino G, Buonadonna A, Aprile G, Pella N, Puglisi F, Fasola G. Drug holidays and overall survival in patients treated for metastatic colorectal cancer. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz246.056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
11
|
Borghi M, Bartoletti M, Basile D, Bertuzzi C, Bodecchi S, Bortot L, Brescia F, Corvaja C, Fanotto V, Favarato M, Garattini S, Gerratana L, Lisanti C, Pelizzari G, Puglisi F, Solfrini V, Valoriani F, Fabiani F. CACHEXIA AND MALNUTRITION IN CANCER PATIENTS: INFLAMMATION INDEXES EVALUATION AND NUTRITIONAL INTERVENTION. Nutrition 2019. [DOI: 10.1016/j.nut.2019.08.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
12
|
Basile D, Borghi M, Lisanti C, Bartoletti M, Gerratana L, Bortot L, Corvaja C, Garattini S, Pelizzari G, Fanotto V, Da Ros L, Nardo PD, Torrisi E, Guardascione M, Bertuzzi C, Fabiani F, Miolo G, Buonadonna A, Puglisi F. THE SLICE STUDY: THE PROGNOSTIC ROLE OF VISCERAL FAT IN METASTATIC COLORECTAL CANCER. Nutrition 2019. [DOI: 10.1016/j.nut.2019.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
13
|
Basile D, Pelizzari G, Corvaja C, Lisanti C, Bartoletti M, Buriolla S, Garattini S, Gerratana L, Bortot L, Cortiula F, Parnofiello A, Ongaro E, Borghi M, Miolo G, Cardellino G, Giaretta R, Schiavo G, Buonadonna A, Puglisi F, Aprile G. SUN-PO094: The Role of Nutritional Interventions in Surgically Treated Pancreatic Cancer Patients: Comparative Efficacy in a Network Meta-Analysis (NMA). Clin Nutr 2019. [DOI: 10.1016/s0261-5614(19)32728-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
14
|
Basile D, Pelizzari G, Di Nardo P, Corvaja C, Ongaro E, Garattini S, Gerratana L, Lisanti C, Michele B, Bortot L, Buriolla S, Garutti M, Curtolo G, Bonotto M, Da Ros L, Torrisi E, Miolo G, Cardellino G, Pella N, Buonadonna A, Aprile G, Puglisi F. The role of sidedness in second-line therapy for RAS wild-type colorectal cancer: a network meta-analysis (NMA). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz155.287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
15
|
Basile D, Gerratana L, Corvaja C, Pelizzari G, Garattini S, Lisanti C, Bartoletti M, Bortot L, Fanotto V, Ongaro E, Cortiula F, Parnofiello A, Vitale M, Da Ros L, Di Nardo P, Torrisi E, Guardascione M, Miolo G, Buonadonna A, Puglisi F. Monocyte-to-lymphocye ratio (MLR) and LDH level in metastatic colorectal cancer (mCRC) patients (pts). Ann Oncol 2018. [DOI: 10.1093/annonc/mdy493.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
16
|
Garattini S, Bonotto M, Porcu L, Ongaro E, Basile D, Cortiula F, Pelizzari G, Cattaneo M, Parnofiello A, Andreotti V, Corvaja C, Cardellino G, Ermacora P, Casagrande M, Iacono D, Pella N, Buonadonna A, Minisini A, Puglisi F, Fasola G. Determinants of oncologist’s choice in offering drug holidays during first line therapy for patients with metastatic colorectal cancer. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy281.140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
17
|
Basile D, Lisanti C, Borghi M, Bartoletti M, Gerratana L, Bortot L, Pelizzari G, Corvaja C, Ongaro E, Garattini S, Fanotto V, Parnofiello A, Cortiula F, Cattaneo M, Andreotti V, Bertoli E, Guardascione M, Miolo G, Puglisi F, Buonadonna A. The SLICE study: The prognostic role of visceral fat in metastatic colorectal cancer. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy281.125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
18
|
Pelizzari G, Gerratana L, Basile D, Zago S, Vitale M, Bartoletti M, Lisanti C, Fanotto V, Corvaja C, Bortot L, Liguori A, Cinausero M, Russo S, Andreetta C, Bonotto M, Mansutti M, Minisini A, Curcio F, Fasola G, Puglisi F. A risk score integrating lymphocytes ratios (LRs) and lactate dehydrogenase (LDH) levels to predict prognosis in metastatic breast cancer (MBC) patients. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy272.292] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
19
|
Basile D, Garattini S, Pelizzari G, Cortiula F, Gerratana L, Cattaneo M, Corvaja C, Parnofiello A, Andreotti V, Bertoli E, Lisanti C, Iacono D, Casagrande M, Cardellino G, Miolo G, Pella N, Aprile G, Buonadonna A, Fasola G, Puglisi F. Monocyte-to-lymphocyte ratio in metastatic colorectal cancer: Prognostic role evaluation and cut-off definition. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy281.086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
20
|
Lisanti C, Basile D, Garattini S, Pelizzari G, Parnofiello A, Cortiula F, Ongaro E, Cattaneo M, Corvaja C, Andreotti V, Bartoletti M, Casagrande M, Iacono D, Bonotto M, Ermacora P, Pella N, Buonadonna A, Puglisi F, Fasola G, Miolo G. The SENECA study: Prognostic role of serum biomarkers in elderly metastatic colorectal cancer patients. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy281.139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
21
|
Corvaja C, Fischer H, Giacometti G. ESR Spectra of Radicals Obtained by the Addition of NH
2
· and of CH
2
OH
· to Vinyl Compounds. ACTA ACUST UNITED AC 2011. [DOI: 10.1524/zpch.1965.45.1_2.001] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
22
|
|
23
|
Franco L, Mazzoni M, Corvaja C, Gubskaya VP, Berezhnaya LS, Nuretdinov IA. TR-EPR of single and double spin labelled C60derivatives: observation of quartet and quintet excited states in solution. Mol Phys 2006. [DOI: 10.1080/00268970600577614] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
24
|
|
25
|
Sartori E, Toffoletti A, Rastrelli F, Corvaja C, Bettio A, Formaggio F, Oancea S, Toniolo C. Intramolecular Interaction between Nitroxide Radical and Photoexcited Benzophenone Triplet Linked to Peptide Templates. J Phys Chem A 2003. [DOI: 10.1021/jp0345203] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- E. Sartori
- Department of Physical Chemistry and Institute of Biomolecular Chemistry, CNR and Department of Organic Chemistry, University of Padova, I-35131 Padova, Italy
| | - A. Toffoletti
- Department of Physical Chemistry and Institute of Biomolecular Chemistry, CNR and Department of Organic Chemistry, University of Padova, I-35131 Padova, Italy
| | - F. Rastrelli
- Department of Physical Chemistry and Institute of Biomolecular Chemistry, CNR and Department of Organic Chemistry, University of Padova, I-35131 Padova, Italy
| | - C. Corvaja
- Department of Physical Chemistry and Institute of Biomolecular Chemistry, CNR and Department of Organic Chemistry, University of Padova, I-35131 Padova, Italy
| | - A. Bettio
- Department of Physical Chemistry and Institute of Biomolecular Chemistry, CNR and Department of Organic Chemistry, University of Padova, I-35131 Padova, Italy
| | - F. Formaggio
- Department of Physical Chemistry and Institute of Biomolecular Chemistry, CNR and Department of Organic Chemistry, University of Padova, I-35131 Padova, Italy
| | - S. Oancea
- Department of Physical Chemistry and Institute of Biomolecular Chemistry, CNR and Department of Organic Chemistry, University of Padova, I-35131 Padova, Italy
| | - C. Toniolo
- Department of Physical Chemistry and Institute of Biomolecular Chemistry, CNR and Department of Organic Chemistry, University of Padova, I-35131 Padova, Italy
| |
Collapse
|
26
|
Tedeschi AM, Franco L, Ruzzi M, Paduano L, Corvaja C, D'Errico G. Micellar aggregation of alkyltrimethylammonium bromide surfactants studied by electron paramagnetic resonance of an anionic nitroxide. Phys Chem Chem Phys 2003. [DOI: 10.1039/b305324p] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
27
|
Corvaja C, Giacometti G. Electron Spin Resonance Spectra of Different Solvates of m-Nitrophenol Negative Ion in a Mixed Solvent. J Am Chem Soc 2002. [DOI: 10.1021/ja01067a054] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
28
|
Corvaja C, Nordio PL, Giacometti G. Electron Spin Resonance Spectra of cis- and trans-3,4,5-Trimethoxyphenylglyoxal Semidione Radical Anions. J Am Chem Soc 2002. [DOI: 10.1021/ja00983a049] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
29
|
Biffis A, Corain B, Zecca M, Corvaja C, Jerabek K. On the Macromolecular Structure and Molecular Accessibility of Swollen Microporous Resins: A Combined ESR-ISEC Approach. J Am Chem Soc 2002. [DOI: 10.1021/ja00110a015] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
30
|
Agostini G, Corvaja C, Giacometti G, Pasimeni L, Clemente DA. Photoexcited triplets and structural properties of single crystals of the trans-stilbene-1,2,4,5-tetracyanobenzene (1:2) complex. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100315a028] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
31
|
Abstract
The intramolecular quenching of photoexcited triplet states by free radicals linked to peptide templates was studied by time-resolved electron paramagnetic resonance (EPR) with pulsed laser excitation. The systems investigated are 3(10)-helix forming peptides, having in the amino acid sequence the free radical 2,2,6,6-tetramethylpiperidine-1-oxyl-4-amino-4-carboxylic acid (TOAC) and a triplet precursor, such as Bin, Bpa, or Trp, incorporated at different relative positions. Upon interaction with the excited triplet the TOAC radical spin sublevel populations assume values that differ from the Boltzmann equilibrium values. This spin polarization effect produces EPR lines in emission whose time evolution reflects the triplet quenching rate. In particular, in a series of peptides labeled with Bpa and TOAC at successive positions in the 3(10)-helix, radical-triplet interaction was observed in all cases. However, for the peptide where Bpa and TOAC are at positions 2 and 4 the rate of triplet quenching is lower than for the other peptides in the series. In addition, the radical-excited triplet complex in the quartet spin state was observed in a peptide containing fullerene (C(60)) as a triplet precursor and TOAC.
Collapse
Affiliation(s)
- C Corvaja
- Department of Physical Chemistry, University of Padova, Padua 35131, Italy.
| | | | | | | | | | | |
Collapse
|
32
|
Corvaja C, Sartori E, Toffoletti A, Formaggio F, Crisma M, Toniolo C, Mazaleyrat JP, Wakselman M. CIDEP effects of intramolecular quenching of singlet and triplet excited states by nitroxide radicals in oligopeptides: a potentially useful new method for investigating peptide secondary structures in solution. Chemistry 2000; 6:2775-82. [PMID: 10985726 DOI: 10.1002/1521-3765(20000804)6:15<2775::aid-chem2775>3.0.co;2-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Two hexapeptides, each bearing one photoactive alpha-amino acid (Bin or Bpa) and one nitroxide-containing TOAC residue, have been synthesized and fully characterized. FT-IR absorption measurements indicate that a 3(10)-helical conformation is adopted by these peptides in solution. As two amino acid units separate the photoactive residue from TOAC in the peptide sequences, the two moieties face each other at a distance of about 6 A after one complete turn of the ternary helix. Irradiation by a light pulse from an excimer laser populates the excited states localized on the chromophores. An intramolecular interaction between the singlet (Bin) or triplet (Bin and Bpa) excited states and the doublet state of the TOAC nitroxide makes a spin-selective decay pathway possible, that produces transient spin polarization. In addition, in order to determine whether the intramolecular exchange interaction occurs through-bond or through-space, we have prepared linear and cyclic TOAC-Bin dipeptide units. A CIDEP study revealed that a through-space intramolecular interaction is operative. The observation of spin polarization makes the two helical hexapeptides suitable models to test the possibility of application of this novel technique to conformational studies of peptides in solution.
Collapse
Affiliation(s)
- C Corvaja
- Department of Physical Chemistry, University of Padova, Italy.
| | | | | | | | | | | | | | | |
Collapse
|
33
|
Finotti P, Corvaja C, Pagetta A. Differential mechanisms for structural and functional alterations of trypsin by heparin, evidence for a specific, radical-generating mechanism at low heparin concentrations. Free Radic Biol Med 1999; 27:1378-85. [PMID: 10641732 DOI: 10.1016/s0891-5849(99)00185-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The oxidative mechanism whereby heparin may interact with various proteins was investigated in detail in this work by addressing the role of doses of heparin on the nature and effects of its binding to bovine trypsin, taken as reference protein. Unfractionated heparin was used at concentrations ranging from 6 to 400 microg/ml with a fixed trypsin concentration (250 microg/ml). At concentrations of up to 60 microg/ml, equivalent to trypsin/heparin molar ratios of between 30 and 3, increasing inhibition of amidolytic activity and radical-dependent peptide bond cleavage of the enzyme was observed, with the appearance in the electrophoretic pattern of new bands of trypsin fragments to which heparin was demonstrated to be bound specifically. Structural modifications were also revealed by increases in fluorescence emission spectra. On the whole, however, the alterations induced by these heparin concentrations only involved a limited number of trypsin molecules. At concentrations from 120 to 400 microg/ml (equivalent trypsin/heparin molar ratios of 1.5-0.46), heparin binding to trypsin appeared to cause more profound and generalized alterations of enzyme structure and function, with dose-dependent quenching of fluorescence emission and almost complete loss of amidolytic activity, although evidence of radical production was lacking. Collectively, the results stress the crucial role of heparin dose on both the nature and effects of its binding to trypsin. The change in heparin effects which reflects distinct underlying molecular mechanisms occurs dramatically at a critical concentration threshold. While a specific, radical-generating mechanism operates at low concentrations, less specific ionic linkages, apparently independent of radical production, best explain the effects of high heparin concentrations.
Collapse
Affiliation(s)
- P Finotti
- Department of Pharmacology, University of Padova, Italy.
| | | | | |
Collapse
|
34
|
Finotti P, Pagetta A, Corvaja C. Role of reducing terminals in unfractionated and low-molecular-mass heparins in causing free radical generation and loss of structure and activity of trypsin. Int J Biol Macromol 1999; 26:135-44. [PMID: 10517520 DOI: 10.1016/s0141-8130(99)00072-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The role of both the length of saccharide chain and reducing terminals in the heparin molecule in causing oxidative effects on proteins was investigated by employing unfractionated and low-molecular-mass heparins (LMMH), with both intact and reduced reducing terminals on bovine trypsin. The effects of heparin were found to be dependent on both the concentration and time of incubation. Heparins with intact reducing terminals caused significantly higher structural and functional alterations of trypsin compared with heparins with reduced reducing terminals. LMMH was slightly more effective than unfractionated heparin (UNFH) in reducing structural integrity and inhibiting the amidolytic activity of trypsin when used at the same mass, but not molar concentrations. Neither the length of saccharide chains nor the number of intact reducing terminals on the heparin molecule appeared to influence the characteristics of the initial binding of heparin to trypsin, but both these variables crucially affected linkages which in time mediate the inhibition of catalytic activity and the formation of free radicals, ultimately responsible for peptide bond cleavage in trypsin. The results suggest that both a critical number of saccharide units, preferentially lying on shorter chains, and intact reducing terminals in the heparin molecule are involved in setting up the binding which generates radicals and leads to loss of structure and function of the proteinase.
Collapse
Affiliation(s)
- P Finotti
- Department of Pharmacology, University of Padova, Italy.
| | | | | |
Collapse
|
35
|
Finotti P, Corvaja C, Pagetta A. Spin-trapping agent alpha-phenyl N-tert-butylnitrone binds to trypsin and enhances heparin-induced inhibition of amidolytic activity and structural degradation of the enzyme. FEBS Lett 1999; 453:159-63. [PMID: 10403394 DOI: 10.1016/s0014-5793(99)00716-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The effects of heparin on trypsin have recently been demonstrated to involve inhibition of catalytic activity and degradation of the enzyme by means of an oxidative mechanism. The possibility that alpha-phenyl N-tert-butylnitrone protects heparin-induced radical formation on trypsin was investigated by measuring amidolytic activity and changes in the structure of trypsin in the presence of heparin with and without alpha-phenyl N-tert-butylnitrone. The results show that alpha-phenyl N-tert-butylnitrone does not only prevent, but it even significantly enhances effects of heparin on the enzyme. This is due to the unique property of alpha-phenyl N-tert-butylnitrone, independently of spin-trapping capacity, to modify the trypsin structure by binding irreversibly to the catalytic triad, at sites distinct from those to which heparin binds.
Collapse
Affiliation(s)
- P Finotti
- Department of Pharmacology, University of Padova, Italy.
| | | | | |
Collapse
|
36
|
Zatta P, Zambenedetti P, Toffoletti A, Corvaja C, Corain B. Aluminum (III) induces alterations on the physical state of the erythrocytic membrane: an ESR evaluation. J Inorg Biochem 1997; 65:109-14. [PMID: 9014343 DOI: 10.1016/s0162-0134(96)00095-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The action of aluminum [Al(III)] as Al(acac)3 on erythrocytes causes biophysical effects such as osmotic fragility and echino-acanthocytes formation. In this paper, we present these effects in terms of variation of membrane fluidity, together with findings regarding conformational modifications of membrane proteins consequent to Al(III) exposure, as well as the effects on the mobility of the membrane protein bound sialic acid. To this end, we utilized ESR measurements of rabbits and humans erythrocytic ghosts after probing or labeling with suitable stable radicals used as spin probes or labels. Our results show that the lipophilic, hydrolytically stable toxicant Al(acac)3 causes a remarkable reduction of membrane fluidity in rabbit erythrocytes, an appreciable structural compacting effect on cytoskeletal and transmembrane proteins, as well as a reduction of rotational mobility of cell-surface sialic acid of human erythrocytes.
Collapse
Affiliation(s)
- P Zatta
- Dipartimento di Biologia, Centro CNR per lo Studio delle Metalloproteine, Padova, Italy
| | | | | | | | | |
Collapse
|
37
|
Zecca M, Biffis A, Palma G, Corvaja C, Lora S, Jeřábek K, Corain B. Interpenetrating Organometallic Polymer Networks Based on Poly(dimethylacrylamide-co-methylenebisacrylamide): Synthesis and ISEC-ESR Characterization. Macromolecules 1996. [DOI: 10.1021/ma951825+] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
38
|
Agostini G, Corvaja C, Pasimeni L. EPR studies of the excited triplet states of C60O and C60C2H4N(CH3) fullerene derivatives and C70 in toluene and polymethylmethacrylate glasses and as films. Chem Phys 1996. [DOI: 10.1016/0301-0104(95)00384-3] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
39
|
Toniolo C, Valente E, Formaggio F, Crisma M, Pilloni G, Corvaja C, Toffoletti A, Martinez GV, Hanson MP, Millhauser GL. Synthesis and conformational studies of peptides containing TOAC, a spin-labelled C alpha, alpha-disubstituted glycine. J Pept Sci 1995; 1:45-57. [PMID: 9222983 DOI: 10.1002/psc.310010107] [Citation(s) in RCA: 98] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A variety of host L-alanine homo-peptides (to the pentamer) containing one or two spin-labelled TOAC (2,2,6,6-tetramethylpiperidine-1-oxyl-4-amino-4-carboxylic acid) residues were synthesized by solution methods and fully characterized. The conformational features of the terminally blocked, doubly spin-labelled TOAC-(Ala)2-TOAC-Ala-pentapeptide were examined in the crystal state by X-ray diffraction and in solution using a combination of techniques (Fourier transform infrared, circular dichroism, cyclic voltammetry and electron spin resonance) in comparison with singly labelled shorter peptides. The 3(10)-helical structure of the pentapeptide, promoted by the two C alpha, alpha-disubstituted glycines under favourable experimental conditions, allows an interaction to take place between the two nitroxide TOAC side chains spaced by one turn of the helix. Taken together, these results suggest that TOAC is an excellent probe for exploring bends and helices in doubly labelled peptides.
Collapse
Affiliation(s)
- C Toniolo
- Department of Organic Chemistry, University of Padova, Italy
| | | | | | | | | | | | | | | | | | | |
Collapse
|
40
|
Tisato F, Vallotto F, Pilloni G, Refosco F, Corvaja C, Corain B. [Cu(H2dped)](BF4)2(H2dped =N,N′-bis(2-(diphenylphosphino)phenyl)ethane-1,2-diamine): a stable phosphine complex of copper(II). ACTA ACUST UNITED AC 1994. [DOI: 10.1039/c39940002397] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
41
|
|
42
|
Ottaviani MF, Fiorini A, Mason PN, Corvaja C. Electron spin resonance studies of dental composites: effects of irradiation time, decay over time, pulverization, and temperature variations. Dent Mater 1992; 8:118-24. [PMID: 1325929 DOI: 10.1016/0109-5641(92)90066-l] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Polymerization induced by UV-VIS light of composite dental materials produces a solid matrix within which terminal radicals of non-polymerized monomers remain trapped. Electron Spin Resonance (ESR) allowed three different types of radicals to be identified. The analysis of ten normally available commercial products gave information on: (1) the propagation of the conversion reaction as a result of exposure to light; (2) the time necessary for the decay of each type of radical; and (3) the variations with temperature and the effects of shattering on the materials under study. The presence of inorganic filling material slowed the process of polymerization, while it accelerated the decay of radicals. It was suggested that the nature of these processes depended on the composition of the base resin materials, whereas it did not depend on the sizes of the filler particles. Moreover, the complete propagation of the conversion reaction needed a period of light exposure greater than that currently suggested by the manufacturers. The structural stability and the resistance of the composites were confirmed by both the long period of decay and the high temperatures needed to overcome the potential barrier for starting the radical decay process. Finally, the composite shattering investigation indicated that particles removed by surface abrasion experience rapid radical decay, thus reducing the possibility of harmful effects on internal organs.
Collapse
Affiliation(s)
- M F Ottaviani
- Dipartimento di Chimica, Universita di Firenze, Italy
| | | | | | | |
Collapse
|
43
|
|
44
|
Agostini G, Corvaja C, Giacometti G, Pasimeni L. ESR and DF ODMR studies of photoexcited triplets in single crystals of t-stilbene-1,2,4,5-tetracyanobenzene (1:2) complex. Chem Phys 1984. [DOI: 10.1016/0301-0104(84)85269-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
45
|
|
46
|
Corvaja C, Giacometti G, Brustolon M. ESR Spectra and Conformation of Five and Six Membered Alicyclic Free Radicals Produced by UV Photolysis*. Z PHYS CHEM 1972. [DOI: 10.1524/zpch.1972.82.5_6.272] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
47
|
|
48
|
Canters GW, Corvaja C, de Boer E. MO Calculations on Sign and Magnitude of the Metal Spin Density in Alkali Radical Ion Pairs. J Chem Phys 1971. [DOI: 10.1063/1.1675289] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
49
|
|
50
|
Corvaja C, Giacometti G, Busetto C. Electron spin resonance spectra and crystal structures of Cr-doped urea adduct compounds of Al- and Co-acetylacetonates. J Mol Struct 1968. [DOI: 10.1016/0022-2860(68)80005-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|