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Aschero R, Ganiewich D, Lamas G, Restrepo-Perdomo CA, Ottaviani D, Zugbi S, Camarero S, Néspoli E, Vilanova MC, Perez-Jaume S, Pascual-Pasto G, Sampor C, Grigorovski N, Salas B, Suñol M, Carcaboso AM, Mora J, de Dávila MTG, Doz F, Radvanyi F, Abramson DH, Llera AS, Schaiquevich PS, Lubieniecki F, Chantada GL. Immunohistochemical expression of TFF1 is a marker of poor prognosis in retinoblastoma. Pediatr Blood Cancer 2024; 71:e30717. [PMID: 37814421 DOI: 10.1002/pbc.30717] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 09/27/2023] [Accepted: 09/28/2023] [Indexed: 10/11/2023]
Abstract
INTRODUCTION The risk of relapse in retinoblastoma is currently determined by the presence of high-risk histopathologic factors in the enucleated eye. However, the probability of developing metastatic disease is heterogeneous among these patients. Evaluating a biological marker to identify high-risk patients could be useful in clinical setting. This study aims to evaluate whether the expression of TFF1, a surrogate for subtype 2 retinoblastoma, is a prognostic marker for relapse and death. METHODS This multicenter cohort study included 273 patients, 48 of whom had extraocular disease. Immunohistochemical staining were performed for CRX, ARR3, TFF1, and Ki67. Tumors were classified as histological subtype 1 (HS1) if they had low or no expression of TFF1 (quick score (QS) ≤ 50) and as histological subtype 2 (HS2) if they expressed TFF1 diffusely (QS > 50). We studied the association between HS classification and outcome. RESULTS Of 273 patients, 35.9% were classified as HS1, 59.3% as HS2 and 4.8% were not evaluable. In multivariate analysis, patients with HS2 tumors had a higher probability of relapse and death than those with HS1 (p < .0001 and p = .00020, respectively). We identified a higher-risk subgroup among HS2 tumors, presenting non-mutually exclusive expression of ARR3 and TFF1 and had an increased risk of relapse and death compared with tumors that displayed mutually exclusive expression (p = .012 and p = .027, respectively). CONCLUSIONS Expression of TFF1, especially when it is not-mutually exclusive with ARR3, is an independent significant marker of poor outcome in retinoblastoma.
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Affiliation(s)
- Rosario Aschero
- Pathology Service, Hospital de Pediatría JP Garrahan, Buenos Aires, Argentina
- National Scientific and Technical Research Council, CONICET, Buenos Aires, Argentina
- SJD Pediatric Cancer Center Barcelona, Hospital Sant Joan de Deu, Barcelona, Spain
- Institut de Recerca Sant Joan de Deu, Barcelona, Spain
| | - Daiana Ganiewich
- Instituto de Investigaciones en Medicina Traslacional - Universidad Austral, Buenos Aires, Argentina
| | - Gabriela Lamas
- Pathology Service, Hospital de Pediatría JP Garrahan, Buenos Aires, Argentina
| | | | - Daniela Ottaviani
- SIREDO Center, Institut Curie and University Paris Cité, Paris, France
| | - Santiago Zugbi
- National Scientific and Technical Research Council, CONICET, Buenos Aires, Argentina
- Unidad de tratamientos innovadores, Hospital de Pediatría JP Garrahan, Buenos Aires, Argentina
| | - Sandra Camarero
- Pathology Service, Hospital de Pediatría JP Garrahan, Buenos Aires, Argentina
| | - Ezequiel Néspoli
- Pathology Service, Hospital de Pediatría JP Garrahan, Buenos Aires, Argentina
| | - Maria Cuadrado Vilanova
- SJD Pediatric Cancer Center Barcelona, Hospital Sant Joan de Deu, Barcelona, Spain
- Institut de Recerca Sant Joan de Deu, Barcelona, Spain
| | - Sara Perez-Jaume
- SJD Pediatric Cancer Center Barcelona, Hospital Sant Joan de Deu, Barcelona, Spain
- Institut de Recerca Sant Joan de Deu, Barcelona, Spain
| | - Guillem Pascual-Pasto
- SJD Pediatric Cancer Center Barcelona, Hospital Sant Joan de Deu, Barcelona, Spain
- Institut de Recerca Sant Joan de Deu, Barcelona, Spain
| | - Claudia Sampor
- Hematology-Oncology Service, Hospital de Pediatría JP Garrahan, Buenos Aires, Argentina
| | - Nathalia Grigorovski
- Department of Pediatric Oncology, Clinical Division, National Institute of Cancer, Rio de Janeiro, Brazil
| | - Beatriz Salas
- Department of Pediatric Oncology, Hospital del Niño Manuel A. Villarroel, Cochabamba, Bolivia
| | - Mariona Suñol
- Pathology Service, Hospital Sant Joan de Deu, Barcelona, Spain
| | - Angel M Carcaboso
- SJD Pediatric Cancer Center Barcelona, Hospital Sant Joan de Deu, Barcelona, Spain
- Institut de Recerca Sant Joan de Deu, Barcelona, Spain
| | - Jaume Mora
- SJD Pediatric Cancer Center Barcelona, Hospital Sant Joan de Deu, Barcelona, Spain
- Institut de Recerca Sant Joan de Deu, Barcelona, Spain
| | - María T G de Dávila
- Pathology Service, Hospital de Pediatría JP Garrahan, Buenos Aires, Argentina
| | - François Doz
- SIREDO Center, Institut Curie and University Paris Cité, Paris, France
| | - François Radvanyi
- SIREDO Center, Institut Curie and University Paris Cité, Paris, France
| | - David H Abramson
- Ophthalmic Oncology Service, Memorial Sloan-Kettering Cancer Center, New York, New York, USA
| | - Andrea S Llera
- National Scientific and Technical Research Council, CONICET, Buenos Aires, Argentina
- Instituto de Investigaciones en Medicina Traslacional - Universidad Austral, Buenos Aires, Argentina
- Laboratory of Molecular and Cellular Therapy, Instituto Leloir-Instituto de Investigaciones Bioquímicas de Buenos Aires (IIBBA), Buenos Aires, Argentina
| | - Paula S Schaiquevich
- National Scientific and Technical Research Council, CONICET, Buenos Aires, Argentina
- Unidad de tratamientos innovadores, Hospital de Pediatría JP Garrahan, Buenos Aires, Argentina
| | - Fabiana Lubieniecki
- Pathology Service, Hospital de Pediatría JP Garrahan, Buenos Aires, Argentina
| | - Guillermo L Chantada
- National Scientific and Technical Research Council, CONICET, Buenos Aires, Argentina
- SJD Pediatric Cancer Center Barcelona, Hospital Sant Joan de Deu, Barcelona, Spain
- Institut de Recerca Sant Joan de Deu, Barcelona, Spain
- Hematology Oncology Service, Hospital Pereyra Rossell, Montevideo, Uruguay
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De la Torre-Tarazona HE, Jiménez R, Bueno P, Camarero S, Román L, Fernández-García JL, Beltrán M, Nothias LF, Cachet X, Paolini J, Litaudon M, Alcami J, Bedoya LM. 4-Deoxyphorbol inhibits HIV-1 infection in synergism with antiretroviral drugs and reactivates viral reservoirs through PKC/MEK activation synergizing with vorinostat. Biochem Pharmacol 2020; 177:113937. [PMID: 32224142 DOI: 10.1016/j.bcp.2020.113937] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 03/24/2020] [Indexed: 01/06/2023]
Abstract
Latent HIV reservoirs are the main obstacle to eradicate HIV infection. One strategy proposes to eliminate these viral reservoirs by pharmacologically reactivating the latently infected T cells. We show here that a 4-deoxyphorbol ester derivative isolated from Euphorbia amygdaloides ssp. semiperfoliata, 4β-dPE A, reactivates HIV-1 from latency and could potentially contribute to decrease the viral reservoir. 4β-dPE A shows two effects in the HIV replication cycle, infection inhibition and HIV transactivation, similarly to other phorboids PKC agonists such PMA and prostratin and to other diterpene esters such SJ23B. Our data suggest 4β-dPE A is non-tumorigenic, unlike the related compound PMA. As the compounds are highly similar, the lack of tumorigenicity by 4β-dPE A could be due to the lack of a long side lipophilic chain that is present in PMA. 4β-dPE activates HIV transcription at nanomolar concentrations, lower than the concentration needed by other latency reversing agents (LRAs) such as prostratin and similar to bryostatin. PKCθ/MEK activation is required for the transcriptional activity, and thus, anti-latency activity of 4β-dPE A. However, CD4, CXCR4 and CCR5 receptors down-regulation effect seems to be independent of PCK/MEK, suggesting the existence of at least two different targets for 4β-dPE A. Furthermore, NF-κb transcription factor is involved in 4β-dPE HIV reactivation, as previously shown for other PKCs agonists. We also studied the effects of 4β-dPE A in combination with other LRAs. When 4β-dPE A was combined with another PKC agonists such as prostratin an antagonic effect was achieved, while, when combined with an HDAC inhibitor such as vorinostat, a strong synergistic effect was obtained. Interestingly, the latency reversing effect of the combination was synergistically diminishing the EC50 value but also increasing the efficacy showed by the drugs alone. In addition, combinations of 4β-dPE A with antiretroviral drugs as CCR5 antagonist, NRTIs, NNRTIs and PIs, showed a consistent synergistic effect, suggesting that the combination would not interefer with antiretroviral therapy (ART). Finally, 4β-dPE A induced latent HIV reactivation in CD4 + T cells of infected patients under ART at similar levels than the tumorigenic phorbol derivative PMA, showing a clear reactivation effect. In summary, we describe here the mechanism of action of a new potent deoxyphorbol derivative as a latency reversing agent candidate to decrease the size of HIV reservoirs.
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Affiliation(s)
- H E De la Torre-Tarazona
- AIDS Immunopathology Department, National Centre of Microbiology, Instituto de Salud Carlos III. Ctra. Pozuelo Km. 2. Majadahonda, 28224 Madrid, Spain
| | - R Jiménez
- AIDS Immunopathology Department, National Centre of Microbiology, Instituto de Salud Carlos III. Ctra. Pozuelo Km. 2. Majadahonda, 28224 Madrid, Spain
| | - P Bueno
- AIDS Immunopathology Department, National Centre of Microbiology, Instituto de Salud Carlos III. Ctra. Pozuelo Km. 2. Majadahonda, 28224 Madrid, Spain
| | - S Camarero
- AIDS Immunopathology Department, National Centre of Microbiology, Instituto de Salud Carlos III. Ctra. Pozuelo Km. 2. Majadahonda, 28224 Madrid, Spain
| | - L Román
- AIDS Immunopathology Department, National Centre of Microbiology, Instituto de Salud Carlos III. Ctra. Pozuelo Km. 2. Majadahonda, 28224 Madrid, Spain
| | - J L Fernández-García
- AIDS Immunopathology Department, National Centre of Microbiology, Instituto de Salud Carlos III. Ctra. Pozuelo Km. 2. Majadahonda, 28224 Madrid, Spain; Pharmacology Department, Pharmacy Faculty, Universidad Complutense de Madrid, Pz. Ramón Y Cajal s/n, 28040 Madrid, Spain
| | - M Beltrán
- AIDS Immunopathology Department, National Centre of Microbiology, Instituto de Salud Carlos III. Ctra. Pozuelo Km. 2. Majadahonda, 28224 Madrid, Spain
| | - L F Nothias
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, University of Paris-Saclay, 91198 Gif-sur-Yvette, France
| | - X Cachet
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, University of Paris-Saclay, 91198 Gif-sur-Yvette, France; CiTCoM Laboratory, UMR 8038 CNRS-University of Paris, Faculty of Pharmacy, University of Paris, 75006 Paris, France
| | - J Paolini
- Laboratoire de Chimie des Produits Naturels, CNRS, UMR SPE 6134, University of Corsica, 20250 Corte, France
| | - M Litaudon
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, University of Paris-Saclay, 91198 Gif-sur-Yvette, France
| | - J Alcami
- AIDS Immunopathology Department, National Centre of Microbiology, Instituto de Salud Carlos III. Ctra. Pozuelo Km. 2. Majadahonda, 28224 Madrid, Spain; Infectious Diseases Unit, IBIDAPS, Hospital Clínic, University of Barcelona, Spain.
| | - L M Bedoya
- AIDS Immunopathology Department, National Centre of Microbiology, Instituto de Salud Carlos III. Ctra. Pozuelo Km. 2. Majadahonda, 28224 Madrid, Spain; Pharmacology Department, Pharmacy Faculty, Universidad Complutense de Madrid, Pz. Ramón Y Cajal s/n, 28040 Madrid, Spain.
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Cuello HA, Segatori VI, Albertó M, Gulino CA, Aschero R, Camarero S, Mutti LG, Madauss K, Alonso DF, Lubieniecki F, Gabri MR. Aberrant O-glycosylation modulates aggressiveness in neuroblastoma. Oncotarget 2018; 9:34176-34188. [PMID: 30344930 PMCID: PMC6183345 DOI: 10.18632/oncotarget.26169] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Accepted: 09/13/2018] [Indexed: 12/28/2022] Open
Abstract
Neuroblastoma (NB) is the most common pediatric malignancy diagnosed before the first birthday in which MYCN oncogene amplification is associated with poor prognosis. Although aberrant glycosylation is an important actor in cell biology, little is known about its role in pediatric cancers such as NB. In this work we characterized the glycophenotype and the enzyme expression involved in glycans biosynthesis in five established human NB cell lines and in patient-derived primary tumors with different MYCN status. Our results show a high expression of Lewis glycan family both in MYCN-amplified cell lines and patient samples. Additionally, we report that MYCN-amplified cells overexpressed Core 2-initiating glycosyltransferase C2GNT1 in association with specific ST3Gals and FUTs, and showed increased binding to E- and P- selectins. Silencing of C2GNT1 expression in NB cells diminished expression of Lewis glycans, decreased the E- and P-selectin binding, and reduced cell adhesion, migration and proliferation in vitro. Treatment of MYCN-non-amplified cells with Trichostatin A (TSA), an histone deacetylase inhibitor, increased the expression of Lewis glycans and the enzymes involved in their biosynthesis. Our results demonstrate that MYCN-amplified NB cells overexpress Lewis family glycans, which belong to the Core 2 O-glycans group. Their expression plays a key role in the malignant behaviour of the NB cells and it is modulated by epigenetic mechanisms.
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Affiliation(s)
- Hector A Cuello
- Molecular Oncology Laboratory, Quilmes National University, Bernal, Buenos Aires Province, Argentina
| | - Valeria I Segatori
- Molecular Oncology Laboratory, Quilmes National University, Bernal, Buenos Aires Province, Argentina
| | - Marina Albertó
- Molecular Oncology Laboratory, Quilmes National University, Bernal, Buenos Aires Province, Argentina
| | - Cynthia A Gulino
- Molecular Oncology Laboratory, Quilmes National University, Bernal, Buenos Aires Province, Argentina
| | - Rosario Aschero
- Department of Pathology, Pediatric Hospital "Prof. Dr. Juan P. Garrahan", Buenos Aires, Argentina
| | - Sandra Camarero
- Department of Pathology, Pediatric Hospital "Prof. Dr. Juan P. Garrahan", Buenos Aires, Argentina
| | - Laura Galluzzo Mutti
- Department of Pathology, Pediatric Hospital "Prof. Dr. Juan P. Garrahan", Buenos Aires, Argentina
| | - Kevin Madauss
- GlaxoSmithKline, Philadelphia, Pennsylvania, United States
| | - Daniel F Alonso
- Molecular Oncology Laboratory, Quilmes National University, Bernal, Buenos Aires Province, Argentina
| | - Fabiana Lubieniecki
- Department of Pathology, Pediatric Hospital "Prof. Dr. Juan P. Garrahan", Buenos Aires, Argentina
| | - Mariano R Gabri
- Molecular Oncology Laboratory, Quilmes National University, Bernal, Buenos Aires Province, Argentina
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Pardo I, Santiago G, Gentili P, Lucas F, Monza E, Medrano FJ, Galli C, Martínez AT, Guallar V, Camarero S. Re-designing the substrate binding pocket of laccase for enhanced oxidation of sinapic acid. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01725d] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Iterative saturation mutagenesis was performed over six residues delimiting the substrate binding pocket of a high redox potential chimeric laccase with the aim of enhancing its activity over sinapic acid, a lignin-related phenol of industrial interest.
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Affiliation(s)
- I. Pardo
- Centro de Investigaciones Biológicas
- CSIC
- 28040 Madrid
- Spain
| | - G. Santiago
- Joint BSC-CRG-IRB Research Program in Computational Biology
- Barcelona Supercomputing Center
- 08034 Barcelona
- Spain
| | - P. Gentili
- Dipartimento di Chimica
- Università “La Sapienza” and IMC-CNR Sezione Meccanismi di Reazione
- 00185 Rome
- Italy
| | - F. Lucas
- Joint BSC-CRG-IRB Research Program in Computational Biology
- Barcelona Supercomputing Center
- 08034 Barcelona
- Spain
- Anaxomics Biotech
| | - E. Monza
- Joint BSC-CRG-IRB Research Program in Computational Biology
- Barcelona Supercomputing Center
- 08034 Barcelona
- Spain
| | - F. J. Medrano
- Centro de Investigaciones Biológicas
- CSIC
- 28040 Madrid
- Spain
| | - C. Galli
- Dipartimento di Chimica
- Università “La Sapienza” and IMC-CNR Sezione Meccanismi di Reazione
- 00185 Rome
- Italy
| | - A. T. Martínez
- Centro de Investigaciones Biológicas
- CSIC
- 28040 Madrid
- Spain
| | - V. Guallar
- Joint BSC-CRG-IRB Research Program in Computational Biology
- Barcelona Supercomputing Center
- 08034 Barcelona
- Spain
- ICREA
| | - S. Camarero
- Centro de Investigaciones Biológicas
- CSIC
- 28040 Madrid
- Spain
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Torbidoni AV, Scursoni A, Camarero S, Segatori V, Gabri M, Alonso D, Chantada G, de Dávila MTG. Immunoreactivity of the 14F7 Mab raised against N-Glycolyl GM3 Ganglioside in retinoblastoma tumours. Acta Ophthalmol 2015; 93:e294-300. [PMID: 25403557 DOI: 10.1111/aos.12578] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2014] [Accepted: 09/23/2014] [Indexed: 01/01/2023]
Abstract
INTRODUCTION The identification of molecules expressed selectively on the surface of retinoblastoma cells would allow applying targeted therapies. The Ganglioside, N-Glycolyl-GM3 (NeuGc-GM3), is an attractive candidate, as it has been detected in other paediatric neuroectodermic tumours, and it is not expressed in human normal tissues. The 14F7 antibody recognizes specifically the ganglioside NeuGc-GM3. PURPOSE To characterize the expression of NeuGc-GM3 in retinoblastoma cell lines and in retinoblastoma tumours using the 14F7 monoclonal antibody. METHODS We studied WERI-Rb1 and Y79 cell lines, 24 retinoblastoma primary tumours from unilateral and bilateral cases and two bone marrow biopsies from metastatic retinoblastoma. Tumours were classified into three groups: non-invasive (n = 13), invasive (n = 9) and metastatic (n = 2). Three eyes enucleated because of non-tumoural conditions were used as controls. Cell lines and tumour sections were studied by immunohistochemistry using the 14F7 antibody. NeuGc-GM3 expression was evaluated by analysing the percentage of positive tumoural cells and the staining intensity. These parameters were analysed comparatively among the three groups. RESULTS Both retinoblastoma cell lines showed immunoreactivity to NeuGc-GM3 but WERI-Rb1 presented higher intensity than Y79. All the tumours studied showed strong immunoreactivity to NeuGc-GM3 with no significant differences among groups. In both bone marrow specimens, NeuGc-GM3 immunoreactivity was observed in retinoblastoma cells. In bilaterally enucleated cases, NeuGc-GM3 immunoreactivity was not altered before and after chemotherapy. Non-tumoural retinas were negative. CONCLUSIONS NeuGc-GM3 is highly expressed in retinoblastoma cell lines, tumours and metastatic cells to the bone marrow, and it is not detectable in control eyes. There were no significant differences in the immunoreactivity to 14F7 among tumours from different disease stages. Its immunoreactivity did not change after chemotherapy.
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Affiliation(s)
- Ana Vanesa Torbidoni
- Department of Hemato-Oncology; Pediatric Hospital “Prof. Dr. Juan P. Garrahan”; Buenos Aires Argentina
| | - Alejandra Scursoni
- Department of Pathology; Pediatric Hospital “Prof. Dr. Juan P. Garrahan”; Buenos Aires Argentina
| | - Sandra Camarero
- Department of Pathology; Pediatric Hospital “Prof. Dr. Juan P. Garrahan”; Buenos Aires Argentina
| | - Valeria Segatori
- Laboratory of Molecular Oncology; Quilmes National University; Buenos Aires Argentina
| | - Mariano Gabri
- Laboratory of Molecular Oncology; Quilmes National University; Buenos Aires Argentina
| | - Daniel Alonso
- Laboratory of Molecular Oncology; Quilmes National University; Buenos Aires Argentina
| | - Guillermo Chantada
- Department of Hemato-Oncology; Pediatric Hospital “Prof. Dr. Juan P. Garrahan”; Buenos Aires Argentina
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Laurent VE, Otero LL, Vazquez V, Camarero S, Gabri MR, Labraga M, De Dávila MTG, Chantada GL, Alonso DF. Optimization of molecular detection of GD2 synthase mRNA in retinoblastoma. Mol Med Rep 2013; 3:253-9. [PMID: 21472230 DOI: 10.3892/mmr_00000248] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Extraocular dissemination is the main cause of death in patients with retinoblastoma (RB) in developing countries, and there are few molecular markers that are useful for the evaluation of minimal disseminated disease. The GD2 ganglioside is known to be expressed by RB cells that metastasize in bone marrow, and the activity of the enzyme responsible for its synthesis, GD2 synthase, can be detected in neuroblastoma, which shares many phenotypic features with RB. The purpose of the present study was to optimize the detection of GD2 synthase expression by reverse transcription-polymerase chain reaction (RT-PCR) followed by nested-PCR in human RB cell lines and patient samples. The optimization strategy was carried out using the RB cell lines Y79 and WERI-Rb1 and specific primers designed for the human sequence of GD2 synthase mRNA. We detected GD2 synthase expression with at least 200 and 40 pg of total RNA extracted from cultured RB cells using a first round of RT-PCR amplification or a second round of nested-PCR, respectively. We also confirmed the expression of GD2 synthase by RT-PCR and immunohistochemical detection of the ganglioside in human RB tumors xenotransplanted in nude mice. Using tumor bank specimens from eight RB patients, we were able to demonstrate the presence of GD2 synthase mRNA in blood and cerebrospinal fluid samples in cases of extraocular dissemination of the tumor. The sequence was not detected in samples derived from children with low-risk disease or healthy adult volunteers. Hence, GD2 synthase mRNA detection through an optimized nested RT-PCR assay is a promising tool for the assessment of minimal disseminated disease in enucleated patients.
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Affiliation(s)
- Viviana E Laurent
- Laboratory of Molecular Oncology, Quilmes National University, Buenos Aires, Argentina
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Sampor C, Guthmann MD, Scursoni A, Cacciavillano W, Torbidoni A, Galluzzo L, Camarero S, Lopez J, de Dávila MTG, Fainboim L, Chantada GL. Immune response to racotumomab in a child with relapsed neuroblastoma. Front Oncol 2012; 2:195. [PMID: 23267436 PMCID: PMC3526767 DOI: 10.3389/fonc.2012.00195] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Accepted: 11/30/2012] [Indexed: 11/13/2022] Open
Abstract
Immunotherapy targeting ganglioside antigens is a powerful tool for the treatment of high risk neuroblastoma. However, only treatment with anti-GD2 antibodies has been used in clinical practice and other options may be pursued. We report the use of racotumomab, an anti-idiotype vaccine against N-glycolyl neuraminic acid (NeuGc)- containing gangliosides, eliciting an immune response in a child with relapsed neuroblastoma expressing the NeuGcGM3 ganglioside.
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Affiliation(s)
- C Sampor
- Department of Hemato-Oncology, Pediatric Hospital Prof. Dr. Juan P. Garrahan Buenos Aires, Argentina
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Abstract
Pleurotus pulmonarius produced the strongest degradation of lignin during solid-state fermentation of [(sup14)C]lignin wheat straw with different fungi. A manganese-oxidizing peroxidase seemed to be involved in lignin attack, since the addition of Mn(sup2+) to the culture increased lignin mineralization by ca. 125%. This enzyme was purified and characterized from both solid-state fermentation and liquid cultures.
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Scursoni AM, Galluzzo L, Camarero S, Pozzo N, Gabri MR, de Acosta CM, Vázquez AM, Alonso DF, de Dávila MTG. Detection and characterization of N-glycolyated gangliosides in Wilms tumor by immunohistochemistry. Pediatr Dev Pathol 2010; 13:18-23. [PMID: 19435393 DOI: 10.2350/08-10-0544.1] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Gangliosides are glycolipids present on the cell surface. The N-glycolylated ganglioside NeuGc-GM3 has been described in some neoplasms, such as breast carcinoma and melanoma, but is usually not detected in normal human cells. Our aim was to evaluate the presence of NeuGc-GM3 in Wilms tumor by immunohistochemistry. Postchemotherapy tumors were grouped into different histologic subtypes considering the main preserved component. Formalin-fixed, paraffin-embedded tumor samples were cut into 5-microm sections. The monoclonal antibody 14F7, a mouse IgG1 that specifically recognizes NeuGc-GM3, and a peroxidase-labeled polymer conjugated to secondary antibodies were used. Sections from breast carcinoma were employed as positive controls. Presence of NeuGc-GM3 was evident in 22 of 25 (88%) cases. The staining was stronger in the epithelial component, with a membrane pattern and cytoplasmic diffusion. The stromal component expressed cytoplasmic NeuGc-GM3 in cells with rhabdomyoblastic differentiation. Tubules of adjacent renal tissue were also positive, but no expression of NeuGc-GM3 was detected in nontumoral fetal kidney. Until now, the expression of N-glycolylated gangliosides in pediatric solid tumors has not been investigated. The present study evidenced the expression of NeuGc-GM3 in a high proportion of Wilms tumors, suggesting its potential utility as a specific target of immunotherapy.
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Affiliation(s)
- Alejandra M Scursoni
- Pathology Department, Pediatric Hospital, "Prof Dr Juan P. Garrahan", Buenos Aires, Argentina
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Gangoiti J, Santos M, Camarero S, Llama M, Serra J. Purification, immobilization and identification of the hydrolysis products of the P(3ho) depolymerase from Pseudomonas fluorescens GK13. N Biotechnol 2009. [DOI: 10.1016/j.nbt.2009.06.446] [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: 11/25/2022]
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Speranza M, Ibarra D, Romero J, Martínez AT, Martínez MJ, Camarero S. Microscopy studies reveal delignification and sterol removal from eucalypt kraft pulps by laccase–HBT. BIOCATAL BIOTRANSFOR 2009. [DOI: 10.1080/10242420701444348] [Citation(s) in RCA: 8] [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: 10/22/2022]
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Sambuelli AM, Negreira SM, Gil AH, Huernos SP, Goncalves S, Toro MA, Kogan Z, Cabanne A, Camarero S, Bai JC, Lazarowski AJ. Multidrug resistance gene (MDR-1) expression in the colonic mucosa of patients with refractory ulcerative colitis. Acta Gastroenterol Latinoam 2006; 36:23-32. [PMID: 16706074] [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] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
BACKGROUND P-Glycoprotein (P-gp), a product of the MDR-1 gene, is a transmembrane efflux pump involved in drug transport, first described in cancer refractoriness. In the normal bowel P-gp is detectable on superficial epithelial cells, but has not been described in crypt epithelium. The role of P-gp and its intestinal expression in steroid-refractory ulcerative colitis (UC) are controversial. AIM to compare P-gp immunostaining pattern in colonic epithelial cells of steroid-refractory versus steroid-responder UC patients. METHODS P-gp was assessed by immunohistochemistry in rectal biopsies obtained from 19 patients with active UC, including pre-surgical samples from 11 refractory patients who underwent colectomy, and 8 responders. We devised a 5-point (0-4) score, according to the percentage of epithelial surface with positive immunostaining in the superficial and crypt epithelium (apical, lateral and cytoplasmic areas). RESULTS Compared with responders, steroid-refractory patients had significantly higher immunostaining scores in the superficial epithelium, both in apical (2.8+/-0.5 versus 1.1+/-0.5, p=0.023) and cytoplasmic cellular areas (2.7+/-0.5 versus 1.2+/-0.5, p=0.032). Positive immunostaining of the superficial epithelium was frequently detected in refractory patients (apical: 9/11 cases, cytoplasmic: 10/11 cases) but was only observed in 4/8 responders. P-gp was also detected in similar areas of the crypt epithelium in 6/11 refractory patients, while it was infrequent in the group of 8 responders (1 apical 1 case, cytoplasmic 2 cases). Samples from the mucosa of normal ileal pouch-anal anastomoses obtained several years after the surgical procedure had a P-gp immunostaining pattern which was similar to that of rectal samples from patients with refractory UC. CONCLUSIONS These results suggest a critical role of P-gp overexpression in steroid-refractory UC.
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Affiliation(s)
- Alicia María Sambuelli
- IBD Section, Clinical Service Dr C. Bonorino Udaondo Gastroenterology Hospital, Buenos Aires, Argentina.
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Lú-Chau TA, Ruiz-Dueñas FJ, Camarero S, Feijoo G, Martínez MJ, Lema JM, Martínez AT. Effect of pH on the stability of Pleurotus eryngii versatile peroxidase during heterologous production in Emericella nidulans. Bioprocess Biosyst Eng 2004; 26:287-93. [PMID: 15300480 DOI: 10.1007/s00449-004-0365-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2002] [Accepted: 06/30/2004] [Indexed: 11/29/2022]
Abstract
Complementary DNA (cDNA) encoding the new versatile peroxidase from the ligninolytic basidiomycete Pleurotus eryngii has been expressed in the ascomycete Emericella nidulans. In recombinant E. nidulans cultures, the pH reached values as high as 8.3, correlating with a sharp decrease in peroxidase activity. Peroxidase was rapidly inactivated at alkaline pH, but was comparatively stable at acidic pH. The peroxidase inactivation in alkaline buffer could be reversed by adding Ca(2+) and lowering the pH. However, reactivation did not result after incubating the enzyme in non-buffered E. nidulans cultures that reached pH 7.5. To optimize recombinant peroxidase production, the effect of controlling the pH in E. nidulans bioreactor cultures was studied. An extended growth period, and a significant increase in the recombinant peroxidase level (5.3-fold higher activity than in the bioreactor without pH control) was obtained when the pH was maintained at 6.8, showing that culture pH is an important parameter for recombinant peroxidase production.
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Affiliation(s)
- T A Lú-Chau
- Department of Chemical Engineering, Institute of Technology, 15706 Santiago de Compostela, Spain.
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15
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Lazarowski A, Lubieniecki F, Camarero S, Pomata H, Bartuluchi M, Sevlever G, Taratuto AL. Multidrug resistance proteins in tuberous sclerosis and refractory epilepsy. Pediatr Neurol 2004; 30:102-6. [PMID: 14984901 DOI: 10.1016/s0887-8994(03)00407-7] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.1] [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] [Received: 02/25/2003] [Accepted: 05/30/2003] [Indexed: 11/16/2022]
Abstract
Tuberous sclerosis is an autosomal dominant syndrome characterized by seizures that are refractory to medication in severely affected individuals. The mechanism involved in drug resistance in tuberous sclerosis is unknown. The proteins MDR-1 (multidrug resistance) and MRP-1 (multidrug resistance-associated protein-1) are linked to chemotherapy resistance in tumor cells. However, the relationship between refractoriness to antiepileptic drugs and MDR-1 or MRP-1 brain expression has been poorly studied. We have previously described a case of tuberous sclerosis with refractory epilepsy that expressed multidrug resistance gene (MDR-1) in tuber cells from epileptogenic brain lesion. In this retrospective study, we describe the expression of MDR-1 and MRP-1 in the epileptogenic cortical tubers of three pediatric patients with tuberous sclerosis and refractory epilepsy surgically treated. Monoclonal antibodies for MDR-1 and MRP-1 proteins were used for immunohistochemistry. In epileptogenic cortical tuber brain specimens, MDR-1 and MRP-1 proteins were strongly immunoreactive in abnormal balloon cells, dysplastic neurons, astrocytes, microglial cells, and some blood-brain vessels. A more extensive MDR-1 immunoreactivity was observed. These data suggest that refractory epilepsy phenotype in tuberous sclerosis can be associated with the expression of both multidrug resistance MDR-1 and MRP-1 transporters in epileptogenic cortical tubers.
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Affiliation(s)
- Alberto Lazarowski
- Clinical Biochemistry Department, Facultad de Farmacia y Bioquimica, Universidad de Buenos Aires, Argentina
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16
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Georis J, Lomascolo A, Camarero S, Dorgeo V, Herpoël I, Asther M, Martinez AT, Dauvrin T. Pycnoporus cinnabarinus laccases: an interesting tool for food or non-food applications. Commun Agric Appl Biol Sci 2003; 68:263-6. [PMID: 15296175] [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] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
Abstract
The effects of the addition of ferulic acid and ethanol in P. cinnabarinus ss3 culture medium in fermentor were compared in 15-L fermentor. In the presence of 30 g l(-1) ethanol, laccase activity (270,000 U/L1) was 3-fold higher as compared with ferulic acid-induced cultures, and 150-fold higher as compared with non-induced cultures, respectively. High-quality flax pulp was bleached in a totally-chlorine free (TCF) sequence using a laccase-mediator system constituted by laccase from Pycnoporus cinnabarinus and 1-hydroxybenzotriazole (HBT) as mediator. Up to 90% delignification and strong brightness increase were attained after the laccase-mediator treatment followed by H2O2 bleaching. This TCF sequence was further improved by applying H2O2 under pressurized O2. In this way, up to 82% ISO brightness was obtained (compared with 37% in the initial pulp and 60% in the peroxide-bleached control) as well as very low kappa number. A positive evaluation of the laccase has been also performed in a food application. The colour of a tea-based beverage was significantly improved by incubating an infusion of green tea with the Pycnoporus laccase.
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Affiliation(s)
- J Georis
- Beldem S.A., Puratos Group, Rue Bourrie 12, ZI de Seilles, B-5300 Andenne, Belgium
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Abstract
Lignin peroxidase (LiP) and manganese peroxidase (MnP) have been investigated in Phanerochaete chrysosporium. A third ligninolytic peroxidase has been described in Pleurotus and Bjerkandera. Two of these versatile peroxidases (VPs) have been cloned, sequenced and characterized. They have high affinity for Mn(2+), hydroquinones and dyes, and also oxidize veratryl alcohol, dimethoxybenzene and lignin dimers. The deduced sequences show higher identity with Ph. chrysosporium LiP than MnP, but the molecular models obtained include a Mn(2+)-binding site. Concerning aromatic substrate oxidation, Pl. eryngii VP shows a putative long-range electron transfer pathway from an exposed trytophan to haem. Mutagenesis and chemical modification of this tryptophan and the acidic residues forming the Mn(2+)-binding site confirmed their role in catalysis. The existence of several substrate oxidation sites is supported further by biochemical evidence. Residue conservation in other fungal peroxidases is discussed.
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Affiliation(s)
- F J Ruiz-Dueñas
- Centro de Investigaciones Biológicas, CSIC, Velázquez 144, E-28006 Madrid, Spain
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18
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Camarero S, Ruiz-Dueñas FJ, Sarkar S, Martínez MJ, Martínez AT. The cloning of a new peroxidase found in lignocellulose cultures of Pleurotus eryngii and sequence comparison with other fungal peroxidases. FEMS Microbiol Lett 2000; 191:37-43. [PMID: 11004397 DOI: 10.1111/j.1574-6968.2000.tb09316.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.9] [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: 11/29/2022] Open
Abstract
We report cloning and sequencing of gene ps1 encoding a versatile peroxidase combining catalytic properties of lignin peroxidase (LiP) and manganese peroxidase (MnP) isolated from lignocellulose cultures of the white-rot fungus Pleurotus eryngii. The gene contains 15 putative introns, and the deduced amino acid sequence consists of a 339-residue mature protein with a 31-residue signal peptide. Several putative response elements were identified in the promoter region. Amino acid residues involved in oxidation of Mn(2+) and aromatic substrates by direct electron transfer to heme and long-range electron transfer from superficial residues as predicted by analogy with Phanerochaete chrysosporium MnP and LiP, respectively. A dendrogram is presented illustrating sequence relationships between 29 fungal peroxidases.
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Affiliation(s)
- S Camarero
- Centro de Investigaciones Biológicas, CSIC, Velázquez 144, E-28006, Madrid, Spain
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Ruiz-Dueñas FJ, Guillén F, Camarero S, Pérez-Boada M, Martínez MJ, Martínez AT. Regulation of peroxidase transcript levels in liquid cultures of the ligninolytic fungus Pleurotus eryngii. Appl Environ Microbiol 1999; 65:4458-63. [PMID: 10508075 PMCID: PMC91593 DOI: 10.1128/aem.65.10.4458-4463.1999] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.2] [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: 11/20/2022] Open
Abstract
A versatile peroxidase able to oxidize Mn(2+) as well as phenolic and nonphenolic aromatic compounds is produced in peptone-containing liquid cultures of Pleurotus eryngii encoded by the gene mnpl. The regulation of its transcript levels was investigated by Northern blotting of total RNA. High-peroxidase transcripts and activity were found in cultures grown in glucose-peptone medium, whereas only basal levels were detected in glucose-ammonium medium. The addition of more than 25 microM Mn(2+) to the former medium did not result in detectable peroxidase transcripts or activity. Potential regulators were also added to isolated mycelium. In this way, it was shown that high transcript levels (in peroxidase-expressing mycelium) were maintained on peptone, whereas expression was not induced in short-term incubation experiments. Similar results were obtained with Mn(2+) ions. Strong induction of mnpl expression was caused by exogenous H(2)O(2) or by continuous H(2)O(2) generation during redox cycling of menadione. By the use of the latter system in the presence of Fe(3+), which catalyzes the reduction of H(2)O(2) to hydroxyl radical, it was shown for the first time that the presence of this strong oxidant causes a rapid increase of the transcripts of a ligninolytic peroxidase. In conclusion, peptone and Mn(2+) affect the levels of transcripts of this versatile peroxidase in culture, and reduced oxygen species induce short-term expression in isolated mycelium, probably via a stress response mechanism.
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Affiliation(s)
- F J Ruiz-Dueñas
- Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Científicas, E-28006 Madrid, Spain
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Camarero S, Sarkar S, Ruiz-Dueñas FJ, Martínez MJ, Martínez AT. Description of a versatile peroxidase involved in the natural degradation of lignin that has both manganese peroxidase and lignin peroxidase substrate interaction sites. J Biol Chem 1999; 274:10324-30. [PMID: 10187820 DOI: 10.1074/jbc.274.15.10324] [Citation(s) in RCA: 227] [Impact Index Per Article: 9.1] [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: 11/06/2022] Open
Abstract
Two major peroxidases are secreted by the fungus Pleurotus eryngii in lignocellulose cultures. One is similar to Phanerochaete chrysosporium manganese-dependent peroxidase. The second protein (PS1), although catalyzing the oxidation of Mn2+ to Mn3+ by H2O2, differs from the above enzymes by its manganese-independent activity enabling it to oxidize substituted phenols and synthetic dyes, as well as the lignin peroxidase (LiP) substrate veratryl alcohol. This is by a mechanism similar to that reported for LiP, as evidenced by p-dimethoxybenzene oxidation yielding benzoquinone. The apparent kinetic constants showed high activity on Mn2+, but methoxyhydroquinone was the natural substrate with the highest enzyme affinity (this and other phenolic substrates are not efficiently oxidized by the P. chrysosporium peroxidases). A three-dimensional model was built using crystal models from four fungal peroxidase as templates. The model suggests high structural affinity of this versatile peroxidase with LiP but shows a putative Mn2+ binding site near the internal heme propionate, involving Glu36, Glu40, and Asp181. A specific substrate interaction site for Mn2+ is supported by kinetic data showing noncompetitive inhibition with other peroxidase substrates. Moreover, residues reported as involved in LiP interaction with veratryl alcohol and other aromatic substrates are present in peroxidase PS1 such as His82 at the heme-channel opening, which is remarkably similar to that of P. chrysosporium LiP, and Trp170 at the protein surface. These residues could be involved in two different hypothetical long range electron transfer pathways from substrate (His82-Ala83-Asn84-His47-heme and Trp170-Leu171-heme) similar to those postulated for LiP.
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Affiliation(s)
- S Camarero
- Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Científicas, Velázquez 144, E-28006 Madrid, Spain
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Martinez MJ, Böckle B, Camarero S, Guillén F, Martinez AT. MnP Isoenzymes Produced by Two Pleurotus Species in Liquid Culture and During Wheat-Straw Solid-State Fermentation. ACS Symposium Series 1996. [DOI: 10.1021/bk-1996-0655.ch014] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- M. J. Martinez
- Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Cientificas, Velázquez 144, E—28006 Madrid, Spain
| | - B. Böckle
- Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Cientificas, Velázquez 144, E—28006 Madrid, Spain
| | - S. Camarero
- Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Cientificas, Velázquez 144, E—28006 Madrid, Spain
| | - F. Guillén
- Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Cientificas, Velázquez 144, E—28006 Madrid, Spain
| | - A. T. Martinez
- Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Cientificas, Velázquez 144, E—28006 Madrid, Spain
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Abstract
The differential biodegradation of phenolic and nonphenolic (C-4-etherified) lignin units in wheat straw treated with the white rot fungi Pleurotus eryngii and Phanerochaete chrysosporium was investigated under solid-state fermentation conditions. Two analytical techniques applied to permethylated straw were used for this purpose, i.e., alkaline CuO degradation and analytical pyrolysis (both followed by gas chromatography-mass spectrometry for product identification). Despite differences in the enzymatic machinery produced, both ligninolytic fungi caused a significant decrease in the relative amount of phenolic lignin units during the degradation process. Nevertheless, no differences in the biodegradation rates of phenolic and etherified cinnamic acids were observed. Changes in lignin composition and cinnamic acid content were also analyzed in the phenolic and nonphenolic lignin moieties. The results obtained are discussed in the context of the enzymatic mechanisms of lignin biodegradation.
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Affiliation(s)
- S Camarero
- Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Científicas, Madrid, Spain
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