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Bergamo F, Brunello A, Procaccio L, Sergi G, Gatti M, Bergo E, Galiano A, Tierno G, Chiusole B, Feltrin A, Daniel F, Prete A, De Grandis M, Piva V, Barsotti G, Rasola C, Maddalena G, Cerma K, Lonardi S, Zagonel V. 399P Role of geriatric assessment and oncological multidimensional prognostic index in elderly patients with metastatic colorectal cancer in a real-world setting. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.537] [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] Open
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Lombardi G, Del Bianco P, Brandes A, Eoli M, Rudà R, Ibrahim T, Lolli I, Pace A, Daniele B, Pasqualetti F, Rizzato S, Bergo E, Caccese M, Padovan M, Soffietti R, De Salvo G, Zagonel V. Health-related quality of life (HRQoL) evaluation in the REGOMA trial: A randomized, phase II clinical trial analyzing regorafenib activity in relapsed glioblastoma patients. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz243.004] [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
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3
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Bergo E, Caccese M, Padovan M, Bellu L, Brunello A, Zagonel V, Lombardi G. Comprehensive geriatric assessment (CGA) can categorize elderly glioblastoma (GBM) patients into three groups predicting survival: A monoinstitutional study. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz243.030] [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
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4
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Lombardi G, Del Bianco P, Brandes A, Eoli M, Rudà R, Ibrahim T, Lolli I, Pace A, Daniele B, Pasqualetti F, Rizzato S, Bergo E, Caccese M, Padovan M, Soffietti R, De Salvo G, Zagonel V. OS7.3 Health-related quality of life (HRQoL) evaluation in the REGOMA trial: a randomized, phase II clinical trial analyzing regorafenib activity in relapsed glioblastoma patients. Neuro Oncol 2019. [DOI: 10.1093/neuonc/noz126.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
BACKGROUND
REGOMA trial showed that regorafenib (REG) significantly improved OS and PFS in patients (pts) with relapsed GBM with respect to lomustine (LOM). REG showed a different toxicity profile compared to LOM. Here, we report final results of the HRQoL assessment, a secondary end point.
MATERIAL AND METHODS
HRQoL was measured using the European Organization for Research and Treatment of Cancer (EORTC) core questionnaire (QLQ-C30) and brain module (QLQ-BN20) administered before any MRI assessments, every 8 weeks (+/- 2 weeks) until disease progression. To evaluate treatment impact on HRQoL, questionnaires at progression were excluded. Mixed-effect linear models were fitted for each of the HRQOL domain to examine the change over progression-free time within and between arms. The models included the time of questionnaire assessment, the treatment group and their interaction, as fixed effects, and a compound symmetry covariance structure for the random effects. Differences of at least 10 points were classified as a clinically meaningful change. To correct for multiple comparisons and to avoid type I error, the level of significance was set at P=0.01 (2-sided).
RESULTS
Of 119 randomized pts, 117 partecipated in the HRQoL evaluation, and 114 had a baseline assessment (n=56 REG; n=58 LOM). No statistically significant differences were observed in any generic or cancer specific domain during treatment in the REG and LOM arms, or between the two arms, except for the appetite loss scale which was significantly worse in PTS treated with REG (Global mean 14.7 (SD=28.6) vs 7.6 (SD=16.0); p=0.0081). The rate of pts with a clinically meaningful worsening for appetite loss was not statistically different between the two arms (9 out of 24 and 0 out of 13 in the REG and LOM arm, respectively;p=0.02).
CONCLUSION
In the REGOMA trial, HRQoL did not change during regorafenib treatment. Pts treated with regorafenib and lomustine reported no significant difference in HRQoL.
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Affiliation(s)
- G Lombardi
- Department of Oncology, Oncology 1 - Veneto Institute of Oncology IOV - IRCCS, Padova, Italy
| | - P Del Bianco
- Clinical Research Unit, Veneto Institute of Oncology IOV - IRCCS, Padova, Italy
| | - A Brandes
- Medical Oncology Department, AUSL-IRCCS Scienze Neurologiche, Bologna, Italy
| | - M Eoli
- Molecolar Neuro-Oncology Unit, Besta Institute, Milano, Italy
| | - R Rudà
- Department of Neuro-Oncology, University of Turin and City of Health and Science Hospital, Torino, Italy
| | - T Ibrahim
- Medical Oncology Unit, IRST-IRCCS, Meldola, Italy
| | - I Lolli
- Medical Oncology Unit - IRCCS Saverio de Bellis, Castellana Grotte, Bari, Italy
| | - A Pace
- Neuroncology Unit, Regina Elena Cancer Institute - IRCCS, Roma, Italy
| | - B Daniele
- Medical Oncology Unit, A.O.G. Rummo, Benevento, Italy
| | - F Pasqualetti
- Radiotherapy Unit, Azienda Ospedaliera Universitaria, Pisa, Italy
| | - S Rizzato
- Department of Oncology, Azienda Sanitaria - Universitaria Integrata, Udine, Italy
| | - E Bergo
- Department of Oncology, Oncology 1 - Veneto Institute of Oncology IOV - IRCCS, Padova, Italy
| | - M Caccese
- Department of Oncology, Oncology 1 - Veneto Institute of Oncology IOV - IRCCS, Padova, Italy
| | - M Padovan
- Department of Oncology, Oncology 1 - Veneto Institute of Oncology IOV - IRCCS, Padova, Italy
| | - R Soffietti
- Department of Neuro-Oncology, University of Turin and City of Health and Science Hospital, Torino, Italy
| | - G De Salvo
- Clinical Research Unit, Veneto Institute of Oncology IOV - IRCCS, Padova, Italy
| | - V Zagonel
- Department of Oncology, Oncology 1 - Veneto Institute of Oncology IOV - IRCCS, Padova, Italy
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Lombardi G, Bergo E, Bellu L, Caccese M, Lettiero A, Tierno G, Pambuku A, Brunello A, Zagonel V. Comprehensive geriatric assessment (CGA) for outcome prediction in elderly patients (PTS) with glioblastoma (GBM): A mono-institutional experience. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy273.369] [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
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Lombardi G, de Salvo G, Rudà R, Franceschi E, Eoli M, Faedi M, Pace A, Lolli I, Rizzato S, Germano D, Pasqualetti F, Farina M, Magni G, Bellu L, Caccese M, Pambuku A, Bergo E, Indraccolo S, Gardiman M, Soffietti R, Zagonel V. OS2.3 Updated results of REGOMA: A randomized, multicenter, controlled open-label phase II clinical trial evaluating regorafenib in relapsed glioblastoma <GBM> patients <PTS>. Neuro Oncol 2018. [DOI: 10.1093/neuonc/noy139.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- G Lombardi
- Department of Clinical and Experimental Oncology, Veneto Institute of Oncology, IOV – IRCCS, Padova, Italy
| | - G de Salvo
- Clinical Trials and Biostatistics Unit, Veneto Institute of Oncology IOV-IRCCS, Padova, Italy
| | - R Rudà
- Department of Neuro-Oncology, University of Turin and City of Health and Science Hospital, Torino, Italy
| | - E Franceschi
- Department of Medical Oncology, Bellaria Hospital, Azienda USL - IRCCS Institute of Neurological Science, Bologna, Italy
| | - M Eoli
- Fondazione IRCCS Istituto Besta, Milano, Italy
| | - M Faedi
- Department of Medical Oncology, IRST - IRCCS, Meldola, Italy
| | - A Pace
- Neuroncology Unit, IFO, Roma, Italy
| | - I Lolli
- Medical Oncology Unit, IRCCS “Saverio de Bellis”, Castellana Grotte, Italy
| | - S Rizzato
- Department of Oncology, Azienda Sanitaria Universitaria Integrata, Udine, Italy
| | - D Germano
- Medical Oncology Unit, Azienda Ospedaliera “G. Rummo”, Benevento, Italy
| | - F Pasqualetti
- Department of Radiotherapy, Azienda Ospedaliero-Universitaria Pisana, Pisa, Italy
| | - M Farina
- Clinical Trials and Biostatistics Unit, Veneto Institute of Oncology IOV-IRCCS, Padova, Italy
| | - G Magni
- Clinical Trials and Biostatistics Unit, Veneto Institute of Oncology IOV-IRCCS, Padova, Italy
| | - L Bellu
- Radiotherapy Unit, IOV-IRCCS, Padova, Italy
| | - M Caccese
- Department of Clinical and Experimental Oncology, Veneto Institute of Oncology, IOV – IRCCS, Padova, Italy
| | - A Pambuku
- Department of Clinical and Experimental Oncology, Veneto Institute of Oncology, IOV – IRCCS, Padova, Italy
| | - E Bergo
- Department of Clinical and Experimental Oncology, Veneto Institute of Oncology, IOV – IRCCS, Padova, Italy
| | - S Indraccolo
- Immunology and Molecular Oncology Unit, IOV-IRCCS, Padova, Italy
| | - M Gardiman
- Unità Anatomia Patologica, Azienda-Università di Padova, Padova, Italy
| | - R Soffietti
- Department of Neuro-Oncology, University of Turin and City of Health and Science Hospital, Torino, Italy
| | - V Zagonel
- Department of Clinical and Experimental Oncology, Veneto Institute of Oncology, IOV – IRCCS, Padova, Italy
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7
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Lombardi G, Bergo E, Bellu L, Caccese M, Lettiero A, Tierno G, Pambuku A, Brunello A, Zagonel V. P01.021 Comprehensive Geriatric Assessment (CGA) for outcome prediction in elderly patients (PTS)with glioblastoma (GBM): a mono-institutional experience. Neuro Oncol 2018. [DOI: 10.1093/neuonc/noy139.063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- G Lombardi
- Veneto Institute of Oncology-IRCCS, Padova, Italy
| | - E Bergo
- Veneto Institute of Oncology-IRCCS, Padova, Italy
| | - L Bellu
- Veneto Institute of Oncology-IRCCS, Padova, Italy
| | - M Caccese
- Veneto Institute of Oncology-IRCCS, Padova, Italy
| | - A Lettiero
- Veneto Institute of Oncology-IRCCS, Padova, Italy
| | - G Tierno
- Veneto Institute of Oncology-IRCCS, Padova, Italy
| | - A Pambuku
- Veneto Institute of Oncology-IRCCS, Padova, Italy
| | - A Brunello
- Veneto Institute of Oncology-IRCCS, Padova, Italy
| | - V Zagonel
- Veneto Institute of Oncology-IRCCS, Padova, Italy
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8
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Bergo E, Lombardi G, Del Bianco P, Dal Pos S, Berti F, Bellu L, Pambuku A, Zagonel V. Worsening of quality of life (QoL), cognitive functions (CF) and psychological status (PSY) can predict radiologic progressive disease (RPD) in glioblastoma (GBM) patients (PTS) treated with radiation therapy (RT) and temozolomide (TMZ): a mono-institutional prospective study. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx431.003] [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: 11/13/2022] Open
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9
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Bergo E, Lombardi G, Del Bianco P, Dal Pos S, Berti F, Bellu L, Pambuku A, Zagonel V. Worsening of quality of life (QoL), cognitive functions (CF) and psychological status (PSY) can predict radiologic progressive disease (RPD) in glioblastoma (GBM) patients (PTS) treated with radiation therapy (RT) and temozolomide (TMZ): A mono-institutional prospective study. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx366.030] [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
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Lombardi G, De Salvo G, Brandes A, Eoli M, Rudà R, Faedi M, Lolli I, Pace A, Rizzato S, Germano D, Pasqualetti F, Farina M, Magni G, Pambuku A, Bergo E, Cabrini G, Indraccolo S, Gardiman M, Zagonel V. REGOMA: A randomized, multicenter, controlled open-label phase II clinical trial evaluating regorafenib activity in relapsed glioblastoma patients. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx440.009] [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
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11
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Bergo E, Lombardi G, Del Bianco P, Berti F, Bellu L, Pambuku A, Zagonel V. A prospective analysis of quality of life (QoL), cognitive functions (CF) and psychological status (PSY) in glioblastoma (GBM) patients (PTS) treated with RT and temozolomide (TMZ). Ann Oncol 2016. [DOI: 10.1093/annonc/mdw367.24] [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
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12
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Bergo E, Bergo E, Lombardi G, Del Bianco P, Berti F, Bellu L, Pambuku A, Zagonel V. A prospective analysis of quality of life (QoL), cognitive functions (CF) and psychological status (PSY) in glioblastoma (GBM) patients (PTS) treated with RT and Temozolomide (TMZ). Ann Oncol 2016. [DOI: 10.1093/annonc/mdw345.31] [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
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13
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Bergo E, Lombardi G, Pambuku A, Della Puppa A, Bellu L, D'Avella D, Zagonel V. Cognitive Rehabilitation in Patients with Gliomas and Other Brain Tumors: State of the Art. Biomed Res Int 2016; 2016:3041824. [PMID: 27493954 PMCID: PMC4963561 DOI: 10.1155/2016/3041824] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 05/26/2016] [Accepted: 06/02/2016] [Indexed: 01/01/2023]
Abstract
Disease prognosis is very poor in patients with brain tumors. Cognitive deficits due to disease or due to its treatment have an important weight on the quality of life of patients and caregivers. Studies often take into account quality of life as a fundamental element in the management of disease and interventions have been developed for cognitive rehabilitation of neuropsychological deficits with the aim of improving the quality of life and daily-life autonomy of patients. In this literature review, we will consider the published studies of cognitive rehabilitation over the past 20 years.
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Affiliation(s)
- E. Bergo
- Department of Clinical and Experimental Oncology, Medical Oncology 1 Unit, Veneto Institute of Oncology IOV-IRCCS, 35128 Padua, Italy
| | - G. Lombardi
- Department of Clinical and Experimental Oncology, Medical Oncology 1 Unit, Veneto Institute of Oncology IOV-IRCCS, 35128 Padua, Italy
| | - A. Pambuku
- Department of Clinical and Experimental Oncology, Medical Oncology 1 Unit, Veneto Institute of Oncology IOV-IRCCS, 35128 Padua, Italy
| | - A. Della Puppa
- Neurosurgery Department, Azienda Ospedaliera di Padova, Padua, Italy
| | - L. Bellu
- Department of Clinical and Experimental Oncology, Medical Oncology 1 Unit, Veneto Institute of Oncology IOV-IRCCS, 35128 Padua, Italy
| | - D. D'Avella
- Neurosurgery Department, University of Padua, Padua, Italy
| | - V. Zagonel
- Department of Clinical and Experimental Oncology, Medical Oncology 1 Unit, Veneto Institute of Oncology IOV-IRCCS, 35128 Padua, Italy
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Bergo E, Lombardi G, Guglieri I, Capovilla E, Pambuku A, Zagone V. Neurocognitive functions and health-related quality of life in glioblastoma patients: a concise review of the literature. Eur J Cancer Care (Engl) 2015; 28:e12410. [PMID: 26531122 DOI: 10.1111/ecc.12410] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/01/2015] [Indexed: 11/29/2022]
Abstract
The maintenance of quality of life in patients with high-grade glioma is an important endpoint during treatment, particularly in those with glioblastoma multiforme, given its dismal prognosis; thus, the primary aims of treatments are to reduce morbidity, restore or preserve neurological functions, and the capacity to perform daily activities. This review aims to summarise what is currently known about neurocognitive outcome and quality of life in patients with high-grade glioma, particularly in glioblastoma patients. We considered all the variables that can influence neurocognitive functions, the perception of quality of life and their role as predictors for treatment outcomes.
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Affiliation(s)
- E Bergo
- Department of Clinical and Experimental Oncology, Medical Oncology 1 Unit, Veneto Institute of Oncology IOV- IRCCS, Padua.,Psycho-Oncology Unit, Veneto Institute of Oncology IOV- IRCCS, Padua, Italy
| | - G Lombardi
- Department of Clinical and Experimental Oncology, Medical Oncology 1 Unit, Veneto Institute of Oncology IOV- IRCCS, Padua
| | - I Guglieri
- Psycho-Oncology Unit, Veneto Institute of Oncology IOV- IRCCS, Padua, Italy
| | - E Capovilla
- Psycho-Oncology Unit, Veneto Institute of Oncology IOV- IRCCS, Padua, Italy
| | - A Pambuku
- Department of Clinical and Experimental Oncology, Medical Oncology 1 Unit, Veneto Institute of Oncology IOV- IRCCS, Padua
| | - V Zagone
- Department of Clinical and Experimental Oncology, Medical Oncology 1 Unit, Veneto Institute of Oncology IOV- IRCCS, Padua
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15
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Bellu L, Lombardi G, Pambuku A, Bergo E, Vittorina Z. Alternative schedule of Fotemustine in elderly patients with recurrent glioblastoma: a phase II prospective study. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv348.38] [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
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16
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Bellu L, Lombardi G, Pambuku A, Bergo E, Zagonel V. 2921 Low-dose Fotemustine in elderly patients with recurrent glioblastoma: A phase II prospective study. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31636-7] [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: 10/22/2022]
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17
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Bergo E, Lombardi G, Fiduccia P, Bellu L, Pambuku A, Zagonel V. 2916 A prospective study analyzing quality of life and cognitive function in patients with glioblastoma treated with RT and Temozolomide: Impact of age and gender. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31631-8] [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: 11/30/2022]
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18
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Finazzi G, Barbagallo RP, Bergo E, Barbato R, Forti G. Photoinhibition of Chlamydomonas reinhardtii in State 1 and State 2: damages to the photosynthetic apparatus under linear and cyclic electron flow. J Biol Chem 2001; 276:22251-7. [PMID: 11294855 DOI: 10.1074/jbc.m011376200] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [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: 11/06/2022] Open
Abstract
The relationship between state transitions and photoinhibition has been studied in Chlamydomonas reinhardtii cells. In State 2, photosystem II activity was more inhibited by light than in State 1. In State 2, however, the D1 subunit was not degraded, whereas a substantial degradation was observed in State 1. These results suggest that photoinhibition occurs via the generation of an intermediate state in which photosystem II is inactive but the D1 protein is still intact. The accumulation of this state is enhanced in State 2, because in this State only cyclic photosynthetic electron transport is active, whereas there is no electron flow between photosystem II and the cytochrome b(6)f complex (Finazzi, G., Furia, A., Barbagallo, R. P., and Forti, G. (1999) Biochim. Biophys. Acta 1413, 117-129). The activity of photosystem I and of cytochrome b(6)f as well as the coupling of thylakoid membranes was not affected by illumination under the same conditions. This allows repairing the damages to photosystem II thanks to cell capacity to maintain a high rate of ATP synthesis (via photosystem I-driven cyclic electron flow). This capacity might represent an important physiological tool in protecting the photosynthetic apparatus from excess of light as well as from other a-biotic stress conditions.
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Affiliation(s)
- G Finazzi
- Centro di Studio del CNR sulla Biologia Cellulare e Molecolare delle Piante, Via Celoria 26, 20133 Milano, Italy.
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Barbato R, Bergo E, Szabò I, Dalla Vecchia F, Giacometti GM. Ultraviolet B exposure of whole leaves of barley affects structure and functional organization of photosystem II. J Biol Chem 2000; 275:10976-82. [PMID: 10753898 DOI: 10.1074/jbc.275.15.10976] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [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: 11/06/2022] Open
Abstract
This study examines the effects of ecologically important levels of ultraviolet B radiation on protein D1 turnover and stability and lateral redistribution of photosystem II. It is shown that ultraviolet B light supported only limited synthesis of protein D1, one of the most important components of photosystem II, whereas it promoted significant degradation of proteins D1 and D2. Furthermore, dephosphorylation of photosystem II subunits was specifically elicited upon exposure to ultraviolet B light. Structural modifications of photosystem II and changes in its lateral distribution between granum membranes and stroma-exposed lamellae were found to be different from those observed after photoinhibition by strong visible light. In particular, more complete dismantling of photosystem II cores was observed. Altogether, the data reported here suggest that ultraviolet B radiation alone fails to activate the photosystem II repair cycle, as hypothesized for visible light. This failure may contribute to the toxic effect of ultraviolet B radiation, which is increasing as a consequence of depletion of stratospheric ozone.
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Affiliation(s)
- R Barbato
- Department of Science and Advanced Technologies, University of Piemonte Orientale "Amedeo Avogadro," Alessandria 15100, Italy
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Barbato R, Bergo E, Giacometti GM. Effects of ultraviolet-B light on photosystem II phosphoproteins in barley wild type and its chlorophyll b-less mutant chlorina f2. J Photochem Photobiol B 1999; 48:189-93. [PMID: 10343404 DOI: 10.1016/s1011-1344(99)00027-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The effects of ultraviolet-B light on the level and steady-state phosphorylation of photosystem II proteins have been studied in barley wild type and its chlorophyll b-less mutant chlorina f2. In the wild type, ultraviolet-B radiation is found to promote dephosphorylation of all thylakoid phosphoproteins. In addition, for reaction-centre proteins D1 and D2, dephosphorylation is paralleled by degradation. Photosystem II core proteins in the mutant are not found to be significantly phosphorylated in any experimental conditions, and loss of D1 and D2 reaction-centre proteins is slightly faster than in the wild type. These results are consistent with the possibility that phosphorylation of reaction-centre proteins affects their stability, possibly by slowing down the rate of degradation, as in the case of visible light.
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Affiliation(s)
- R Barbato
- Dipartimento di Scienze e Tecnologie Avanzate, Università del Piemonte Orientale, Alessandria, Italy
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Wilkerson RC, Parsons TJ, Klein TA, Gaffigan TV, Bergo E, Consolim J. Diagnosis by random amplified polymorphic DNA polymerase chain reaction of four cryptic species related to Anopheles (Nyssorhynchus) albitarsis (Diptera: Culicidae) from Paraguay, Argentina, and Brazil. J Med Entomol 1995; 32:697-704. [PMID: 7473625 DOI: 10.1093/jmedent/32.5.697] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Random amplified polymorphic DNA polymerase chain reaction (RAPD-PCR) analysis was applied to samples from widespread populations of the poorly characterized Anopheles (Nyssorhynchus) albitarsis Lynch-Arribálzaga species complex, and 4 genetically differentiated species were distinguished. A screen of 65 random decamer oligonucleotide primers identified 12 primers, which produced 19 reproducible species-specific genetic markers and 4 markers common to 2 or more species. These markers were correlated in nearly all individuals of each species throughout the ranges sampled, including populations as far apart as 2,500 km. Each individual analyzed was from a different isofemale progeny brood, with associated morphological specimens. These specimens will facilitate studies to relate these species to previously reported chromosomal and enzymatic variation as well as to their feeding behavior and potential as malaria vectors. We hypothesize that 3 of the species have recognized valid names: An. (Nys.) albitarsis Lynch-Arribálzaga, An. (Nys.) marajoara Galvão and Damasceno, and An. (Nys.) deaneorum Rosa-Freitas, whereas the 4th is undescribed.
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Affiliation(s)
- R C Wilkerson
- Department of Entomology, Walter Reed Army Institute of Research, Washington, DC 20307-5100, USA
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