9 results on '"Holmes, Keith"'
Search Results
2. Indicators of vegetation productivity under a changing climate in British Columbia, Canada.
- Author
-
Holmes, Keith R., Coops, Nicholas C., Nelson, Trisalyn A., Fontana, Fabio M.A., and Wulder, Michael A.
- Subjects
- *
VEGETATION & climate , *CLIMATE change , *LANDSCAPES , *REMOTE sensing , *REGRESSION trees , *RADIOMETERS - Abstract
Understanding the relationship between vegetation and climate is essential for predicting the impact of climate change on broad-scale landscape processes. Utilizing vegetation indicators derived from remotely sensed imagery, we present an approach to forecast shifts in the future distribution of vegetation. Remotely sensed metrics representing cumulative greenness, seasonality, and minimum cover have successfully been linked to species distributions over broad spatial scales. In this paper we developed models between a historical time series of Advanced Very High Resolution Radiometer (AVHRR) satellite imagery from 1987 to 2007 at 1 km spatial resolution with corresponding climate data using regression tree modeling approaches. We then applied these models to three climate change scenarios produced by the Canadian Centre for Climate Modeling and Analysis (CCCma) to predict and map productivity indices in 2065. Our results indicated that warming may lead to increased cumulative greenness in northern British Columbia and seasonality in vegetation is expected to decrease for higher elevations, while levels of minimum cover increase. The Coast Mountains of the Pacific Maritime region and high elevation edge habitats across British Columbia were forecasted to experience the greatest amount of change. Our approach provides resource managers with information to mitigate and adapt to future habitat dynamics. Forecasting vegetation productivity levels presents a novel approach for understanding the future implications of climate change on broad scale spatial patterns of vegetation. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
3. 10-Year outcome of children born with anorectal malformation, treated by posterior sagittal anorectoplasty, assessed according to the Krickenbeck classification.
- Author
-
Hassett, Sinead, Snell, Stella, Hughes-Thomas, Amy, and Holmes, Keith
- Subjects
RECTAL surgery ,RECTUM abnormalities ,PEDIATRIC therapy ,HEALTH outcome assessment ,QUESTIONNAIRES ,CONSTIPATION in children ,INTESTINAL fistula - Abstract
Abstract: Background: Anorectal malformations (ARMs) affect 1 in 4000 to 5000 births. The Krickenbeck conference developed a classification based on anatomical and functional criteria to better compare treatment outcome. Aim: The aim of this study is to evaluate the functional outcome in patients 10 years following standardized surgical treatment of ARM related to the Krickenbeck classification. . Methods: Anatomical anomalies were classified as above. Children and carers were followed closely in a multidisciplinary clinic. Data were collected using a functional outcome questionnaire for a minimum of 10 years after surgical reconstruction. Outcome measurements were related to the Krickenbeck classification. Results: There were 53 children in the study group (29 male, 24 female). Krickenbeck anatomy: perineal fistula, 36%; vestibular fistula, 26%; rectourethral fistula, 36%; rectovesical fistula, 2%. All children were treated by posterior sagittal anorectoplasty. In children with perineal fistula, continence was achieved in 90%. Grade 2 constipation was noted in 21%. One child had a Malone antegrade continence enema (MACE) procedure. In children with vestibular fistula, continence was achieved in 57%. Grade 3 constipation was noted in 28%. One child had grade 1, and one child had grade 2 soiling. Two children had a MACE procedure. In children with rectourethral fistula, continence was achieved in 58%. One child had grade 3 soiling. Grade 3 constipation was found in 42% of children and grade 2 constipation in 1 child. A MACE procedure was performed in 36%. The only child with a bladder neck fistula had a MACE procedure for intractable soiling. Conclusions: The outcome for patients with ARM is related to the severity of the anomaly. The uniform application of the Krickenbeck classification should allow rational comparison of treatment outcome. [Copyright &y& Elsevier]
- Published
- 2009
- Full Text
- View/download PDF
4. The infusion of an NMDA antagonist into perirhinal cortex suppresses amygdala-kindled seizures
- Author
-
Holmes, Keith H., Bilkey, David K., and Laverty, Richard
- Published
- 1992
- Full Text
- View/download PDF
5. TheN-methyl- D-aspartate antagonists aminophosphonovalerate and car☐ypiperazinephosphonate retard the development and expression of kindled seizures
- Author
-
Holmes, Keith H., Bilkey, David K., Laverty, Richard, and Goddard, Graham V.
- Published
- 1990
- Full Text
- View/download PDF
6. Interleukin 2 with anti-GD2 antibody ch14.18/CHO (dinutuximab beta) in patients with high-risk neuroblastoma (HR-NBL1/SIOPEN): a multicentre, randomised, phase 3 trial.
- Author
-
Ladenstein, Ruth, Pötschger, Ulrike, Valteau-Couanet, Dominique, Luksch, Roberto, Castel, Victoria, Yaniv, Isaac, Laureys, Genevieve, Brock, Penelope, Michon, Jean Marie, Owens, Cormac, Trahair, Toby, Chan, Godfrey Chi Fung, Ruud, Ellen, Schroeder, Henrik, Beck Popovic, Maja, Schreier, Guenter, Loibner, Hans, Ambros, Peter, Holmes, Keith, and Castellani, Maria Rita
- Subjects
- *
IMMUNOTHERAPY , *MONOCLONAL antibodies , *NEUROBLASTOMA , *CYCLOPHOSPHAMIDE , *CISPLATIN , *AGE distribution , *ANTINEOPLASTIC agents , *COMPARATIVE studies , *INTERLEUKIN-2 , *ISOTRETINOIN , *RESEARCH methodology , *MEDICAL cooperation , *RESEARCH , *RESEARCH funding , *TIME , *EVALUATION research , *RANDOMIZED controlled trials - Abstract
Background: Immunotherapy with the chimeric anti-GD2 monoclonal antibody dinutuximab, combined with alternating granulocyte-macrophage colony-stimulating factor and intravenous interleukin-2 (IL-2), improves survival in patients with high-risk neuroblastoma. We aimed to assess event-free survival after treatment with ch14.18/CHO (dinutuximab beta) and subcutaneous IL-2, compared with dinutuximab beta alone in children and young people with high-risk neuroblastoma.Methods: We did an international, open-label, phase 3, randomised, controlled trial in patients with high-risk neuroblastoma at 104 institutions in 12 countries. Eligible patients were aged 1-20 years and had MYCN-amplified neuroblastoma with stages 2, 3, or 4S, or stage 4 neuroblastoma of any MYCN status, according to the International Neuroblastoma Staging System. Patients were eligible if they had been enrolled at diagnosis in the HR-NBL1/SIOPEN trial, had completed the multidrug induction regimen (cisplatin, carboplatin, cyclophosphamide, vincristine, and etoposide, with or without topotecan, vincristine, and doxorubicin), had achieved a disease response that fulfilled prespecified criteria, had received high-dose therapy (busulfan and melphalan or carboplatin, etoposide, and melphalan) and had received radiotherapy to the primary tumour site. In this component of the trial, patients were randomly assigned (1:1) to receive dinutuximab beta (20 mg/m2 per day as an 8 h infusion for 5 consecutive days) or dinutuximab beta plus subcutaneous IL-2 (6 × 106 IU/m2 per day on days 1-5 and days 8-12 of each cycle) with the minimisation method to balance randomisation for national groups and type of high-dose therapy. All participants received oral isotretinoin (160 mg/m2 per day for 2 weeks) before the first immunotherapy cycle and after each immunotherapy cycle, for six cycles. The primary endpoint was 3-year event-free survival, analysed by intention to treat. This trial was registered with ClinicalTrials.gov, number NCT01704716, and EudraCT, number 2006-001489-17, and recruitment to this randomisation is closed.Findings: Between Oct 22, 2009, and Aug 12, 2013, 422 patients were eligible to participate in the immunotherapy randomisation, of whom 406 (96%) were randomly assigned to a treatment group (n=200 to dinutuximab beta and n=206 to dinutuximab beta with subcutaneous IL-2). Median follow-up was 4·7 years (IQR 3·9-5·3). Because of toxicity, 117 (62%) of 188 patients assigned to dinutuximab beta and subcutaneous IL-2 received their allocated treatment, by contrast with 160 (87%) of 183 patients who received dinutuximab beta alone (p<0·0001). 3-year event-free survival was 56% (95% CI 49-63) with dinutuximab beta (83 patients had an event) and 60% (53-66) with dinutuximab beta and subcutaneous IL-2 (80 patients had an event; p=0·76). Four patients died of toxicity (n=2 in each group); one patient in each group while receiving immunotherapy (n=1 congestive heart failure and pulmonary hypertension due to capillary leak syndrome; n=1 infection-related acute respiratory distress syndrome), and one patient in each group after five cycles of immunotherapy (n=1 fungal infection and multi-organ failure; n=1 pulmonary fibrosis). The most common grade 3-4 adverse events were hypersensitivity reactions (19 [10%] of 185 patients in the dinutuximab beta group vs 39 [20%] of 191 patients in the dinutuximab plus subcutaneous IL-2 group), capillary leak (five [4%] of 119 vs 19 [15%] of 125), fever (25 [14%] of 185 vs 76 [40%] of 190), infection (47 [25%] of 185 vs 64 [33%] of 191), immunotherapy-related pain (19 [16%] of 122 vs 32 [26%] of 124), and impaired general condition (30 [16%] of 185 vs 78 [41%] of 192).Interpretation: There is no evidence that addition of subcutaneous IL-2 to immunotherapy with dinutuximab beta, given as an 8 h infusion, improved outcomes in patients with high-risk neuroblastoma who had responded to standard induction and consolidation treatment. Subcutaneous IL-2 with dinutuximab beta was associated with greater toxicity than dinutuximab beta alone. Dinutuximab beta and isotretinoin without subcutaneous IL-2 should thus be considered the standard of care until results of ongoing randomised trials using a modified schedule of dinutuximab beta and subcutaneous IL-2 are available.Funding: European Commission 5th Frame Work Grant, St. Anna Kinderkrebsforschung, Fondation ARC pour la recherche sur le Cancer. [ABSTRACT FROM AUTHOR]- Published
- 2018
- Full Text
- View/download PDF
7. The functional role of metabotropic glutamate receptors in epileptiform activity induced by 4-aminopyridine in the rat amygdala slice
- Author
-
Arvanov, Viktor L., Holmes, Keith H., Keele, N. Bradley, and Shinnick-Gallagher, Patricia
- Published
- 1995
- Full Text
- View/download PDF
8. Molecular characterisation of fungal endophytic morphospecies associated with the indigenous forest tree, Theobroma gileri, in Ecuador
- Author
-
Thomas, Sarah E., Crozier, Jayne, Catherine Aime, M., Evans, Harry C., and Holmes, Keith A.
- Subjects
- *
MOLECULAR dynamics , *ENDOPHYTIC fungi , *FOREST genetics , *PATHOGENIC microorganisms - Abstract
Abstract: Fungal endophytes were isolated from healthy stems and pods of Theobroma gileri, an alternative host of the frosty pod rot pathogen of cacao. Non-sporulating isolates were grouped into 46 different morphological species according to their colony morphology. Many of these morphospecies were assumed to be basidiomycetes and, therefore, were of particular interest. Basidiomycetous endophytes have received far less attention than ascomycetes and also have potential as biological control agents of the basidiomycetous pathogens of T. cacao: Moniliophthora roreri (frosty pod rot pathogen) and M. perniciosa (witches'' broom disease). The morphospecies were further characterised by molecular analyses. Amplification of the nuLSU was undertaken for phylogenetic placement of these non-sporulating cultures and revealed a total of 31 different taxa of which 15 were basidiomycetes belonging to the class Agaricomycetes, and 16 ascomycetes primarily belonging to the Sordariomycetes. [Copyright &y& Elsevier]
- Published
- 2008
- Full Text
- View/download PDF
9. Trichoderma theobromicola and T. paucisporum: two new species isolated from cacao in South America
- Author
-
Samuels, Gary J., Suarez, Carmen, Solis, Karina, Holmes, Keith A., Thomas, Sarah E., Ismaiel, Adnan, and Evans, Harry C.
- Subjects
- *
TRICHODERMA , *CACAO , *PSYCHOTROPIC plants , *PLANT genetic engineering , *AGAR , *MYCOLOGY , *BOTANY - Abstract
Abstract: Trichoderma theobromicola and T. paucisporum spp. nov. are described. Trichoderma theobromicola was isolated as an endophyte from the trunk of a healthy cacao tree (Theobroma cacao, Malvaceae) in Amazonian Peru; it sporulates profusely on common mycological media. Trichoderma paucisporum is represented by two cultures that were obtained in Ecuador from cacao pods partially infected with frosty pod rot, Moniliophthora roreri; it sporulates sporadically and most cultures remain sterile on common media and autoclaved rice. It sporulates more reliably on synthetic low-nutrient agar (SNA) but produces few conidia. Trichoderma theobromicola was reintroduced into cacao seedlings through shoot inoculation and was recovered from stems but not from leaves, indicating that it is an endophytic species. Both produced a volatile/diffusable antibiotic that inhibited development of M. roreri in vitro and on-pod trials. Neither species demonstrated significant direct in vitro mycoparasitic activity against M. roreri. [Copyright &y& Elsevier]
- Published
- 2006
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.