|
1
|
Allajbeu I, Morris K, Nanaa M, Payne N, Charnley K, Moyle PL, Taylor K, Sharma N, Lim Y, Gilbert FJ. Introduction of automated breast ultrasound as an additional screening tool for dense breasts in the UK: a practical approach from the BRAID trial. Clin Radiol 2024; 79:e641-e650. [PMID: 38413353 DOI: 10.1016/j.crad.2023.11.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Revised: 11/09/2023] [Accepted: 11/13/2023] [Indexed: 02/29/2024]
Affiliation(s)
- I Allajbeu
- Cambridge Breast Unit, Cambridge University Hospitals NHS Foundation Trust, Addenbrookes' Hospital, Hills Road, Cambridge CB2 0QQ, UK; Western Balkans University, 1001, Tirana, Albania; Department of Radiology, University of Cambridge, School of Clinical Medicine, Box 218, Level 5, Cambridge Biomedical Campus, Cambridge CB2 0QQ, UK
| | - K Morris
- Cambridge Breast Unit, Cambridge University Hospitals NHS Foundation Trust, Addenbrookes' Hospital, Hills Road, Cambridge CB2 0QQ, UK
| | - M Nanaa
- Department of Radiology, University of Cambridge, School of Clinical Medicine, Box 218, Level 5, Cambridge Biomedical Campus, Cambridge CB2 0QQ, UK
| | - N Payne
- Department of Radiology, University of Cambridge, School of Clinical Medicine, Box 218, Level 5, Cambridge Biomedical Campus, Cambridge CB2 0QQ, UK
| | - K Charnley
- Department of Radiology, University of Cambridge, School of Clinical Medicine, Box 218, Level 5, Cambridge Biomedical Campus, Cambridge CB2 0QQ, UK
| | - P L Moyle
- Cambridge Breast Unit, Cambridge University Hospitals NHS Foundation Trust, Addenbrookes' Hospital, Hills Road, Cambridge CB2 0QQ, UK
| | - K Taylor
- Cambridge Breast Unit, Cambridge University Hospitals NHS Foundation Trust, Addenbrookes' Hospital, Hills Road, Cambridge CB2 0QQ, UK
| | - N Sharma
- Breast Unit, Level 1 Chancellor Wing, St James Hospital, Beckett Street, Leeds LS9 7TF, UK
| | - Y Lim
- University Hospital of South Manchester, NHS Foundation Trust, Oxford Road, Manchester M13 9WL, UK
| | - F J Gilbert
- Cambridge Breast Unit, Cambridge University Hospitals NHS Foundation Trust, Addenbrookes' Hospital, Hills Road, Cambridge CB2 0QQ, UK; Department of Radiology, University of Cambridge, School of Clinical Medicine, Box 218, Level 5, Cambridge Biomedical Campus, Cambridge CB2 0QQ, UK.
| |
Collapse
|
|
2
|
Abstract
Attempts to improve the effectiveness of entomopathogenic fungi as biological control agents require a clear understanding of the pathogenicity determinants at both the biochemical and molecular level. Proteases play a key role in entomopathogenicity, allowing the fungus to penetrate the insect cuticle and rapidly invade the host. The most extensively studied of these protease activities, PR1A and PR2, are both subject to nitrogen derepression. The Metarhizium anisopliae nrr1 (nitrogen response regulator 1) gene was identified using a PCR-based strategy; it encodes a putative DNA-binding protein with a single zinc finger motif defined by the C-X2-C-X17-C-X2-C sequence. M. anisopliae NRR1 shows a significant sequence similarity to Neurospora crassa NIT2. Sequence analysis identified the presence of two introns, suggesting a greater degree of similarity to N. crassa nit2 than to the areA-like genes that have been identified. However, functional equivalence of nrr1 to areA was demonstrated, by co-transformation and complementation of an A. nidulans areA loss-of-function mutant (areA18 argB2 pabaA1 inoB2) with the M. anisopliae nrr1 gene. The areA-/nrr1+ Aspergillus transformants were able to grow on media with nitrate and glutamate as the sole nitrogen source, whereas the areA- strain is unable to grow under these conditions. The possible relevance of nitrogen regulation to pathogenicity is discussed.
Collapse
Affiliation(s)
- S Screen
- Microbial Pathogenicity Group, School of Biology and Biochemistry, University of Bath, UK.
| | | | | | | | | |
Collapse
|
|
3
|
Screen S, Bailey A, Charnley K, Cooper R, Clarkson J. Carbon regulation of the cuticle-degrading enzyme PR1 from Metarhizium anisopliae may involve a trans-acting DNA-binding protein CRR1, a functional equivalent of the Aspergillus nidulans CREA protein. Curr Genet 1997; 31:511-8. [PMID: 9211795 DOI: 10.1007/s002940050238] [Citation(s) in RCA: 50] [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: 02/04/2023]
Abstract
The pr1 gene of the entomopathogenic fungus Metarhizium anisopliae encodes a serine protease that is highly active towards the insect cuticle and whose synthesis is subject to both carbon and nitrogen repression. The pr1 promoter region was sequenced revealing the presence of putative CREA- and AREA-binding sites. In vitro bandshift experiments demonstrated that an Aspergillus nidulans GST-CREA fusion protein was capable of binding to two of the three putative CREA sites. Using a PCR-based strategy the M. anisopliae crr1 gene was identified; it encodes a putative C2H2-type DNA-binding protein with significant sequence similarity to A. nidulans CREA. Complementation experiments with an A. nidulans strain carrying creA204 demonstrated that CRR1 can partially substitute for CREA function.
Collapse
Affiliation(s)
- S Screen
- Microbial Pathogenicity Group, School of Biology and Biochemistry, University of Bath, Bath, UK
| | | | | | | | | |
Collapse
|