Keyword search (4,163 papers available)

"Law C" Authored Publications:

Title Authors PubMed ID
1 Characterization of ORF19.7608 (PPP1), a biofilm-induced gene of Candida albicans Iwuchukwu NC; Costa ACBPD; Law C; Kim MJ; Mitchell AP; Whiteway M; 41218072
BIOLOGY
2 Chloroplast biogenesis involves spatial coordination of nuclear and organellar gene expression in Chlamydomonas Sun Y; Bakhtiari S; Valente-Paterno M; Wu Y; Nishimura Y; Shen W; Law C; Dhaliwal J; Dai D; Bui KH; Zerges W; 38709497
BIOLOGY
3 Endogenous tagging using split mNeonGreen in human iPSCs for live imaging studies Husser MC; Pham NP; Law C; Araujo FRB; Martin VJJ; Piekny A; 38652106
BIOLOGY
4 Polarization and cell-fate decision facilitated by the adaptor Ste50p in Saccharomyces cerevisiae Sharmeen N; Law C; Wu C; 36538537
BIOLOGY
5 A Deep Learning Approach to Capture the Essence of Candida albicans Morphologies Bettauer V; Costa ACBP; Omran RP; Massahi S; Kirbizakis E; Simpson S; Dumeaux V; Law C; Whiteway M; Hallett MT; 35972285
BIOLOGY
6 Diverse mechanisms regulate contractile ring assembly for cytokinesis in the two-cell C. elegans embryo Ozugergin I; Mastronardi K; Law C; Piekny A; 35022791
BIOLOGY
7 The zinc cluster transcription factor Rha1 is a positive filamentation regulator in Candida albicans Omran RP; Ramírez-Zavala B; Aji Tebung W; Yao S; Feng J; Law C; Dumeaux V; Morschhäuser J; Whiteway M; 34849863
PERFORM
8 Signal-mediated localization of Candida albicans pheromone response pathway components Costa ACBP; Omran RP; Law C; Dumeaux V; Whiteway M; 33793759
PERFORM
9 Multi-tissue patterning drives anterior morphogenesis of the C. elegans embryo. Grimbert S, Mastronardi K, Richard V, Christensen R, Law C, Zardoui K, Fay D, Piekny A 33309948
BIOLOGY
10 The phenotype associated with variants in TANGO2 may be explained by a dual role of the protein in ER-to-Golgi transport and at the mitochondria. Milev MP, Saint-Dic D, Zardoui K, Klopstock T, Law C, Distelmaier F, Sacher M 32909282
BIOLOGY
11 Photosystem Biogenesis Is Localized to the Translation Zone in the Chloroplast of Chlamydomonas. Sun Y, Valente-Paterno MI, Bakhtiari S, Law C, Zhan Y, Zerges W 31591163
CSFG
12 Active Ran regulates anillin function during cytokinesis. Beaudet D, Akhshi T, Phillipp J, Law C, Piekny A 28931593
BIOLOGY

 

Title:A Deep Learning Approach to Capture the Essence of Candida albicans Morphologies
Authors:Bettauer VCosta ACBPOmran RPMassahi SKirbizakis ESimpson SDumeaux VLaw CWhiteway MHallett MT
Link:pubmed.ncbi.nlm.nih.gov/35972285/
DOI:10.1128/spectrum.01472-22
Publication:Microbiology spectrum
Keywords:Candida albicansdeep learningfully convolutional one-stage object detectiongenerative adversarial networkmicroscopymorphology
PMID:35972285 Category: Date Added:2022-08-16
Dept Affiliation: BIOLOGY
1 Department of Computer Science and Software Engineering, Concordia Universitygrid.410319.e, Montreal, Quebec, Canada.
2 Department of Biology, Concordia Universitygrid.410319.e, Montreal, Quebec, Canada.
3 Department of Anatomy and Cell Biology, Western University, London, Ontario, Canada.
4 Centre for Microscopy and Cellular Imaging, Concordia Universitygrid.410319.e, Montreal, Quebec, Canada.
5 Department of Biochemistry, Western University, London, Ontario, Canada.

Description:

We present deep learning-based approaches for exploring the complex array of morphologies exhibited by the opportunistic human pathogen Candida albicans. Our system, entitled Candescence, automatically detects C. albicans cells from differential image contrast microscopy and labels each detected cell with one of nine morphologies. This ranges from yeast white and opaque forms to hyphal and pseudohyphal filamentous morphologies. The software is based upon a fully convolutional one-stage (FCOS) object detector, a deep learning technique that uses an extensive set of images that we manually annotated with the location and morphology of each cell. We developed a novel cumulative curriculum-based learning strategy that stratifies our images by difficulty from simple yeast forms to complex filamentous architectures. Candescence achieves very good performance (~85% recall; 81% precision) on this difficult learning set, where some images contain hundreds of cells with substantial intermixing between the predicted classes. To capture the essence of each C. albicans morphology and how they intermix, we used a second technique from deep learning entitled generative adversarial networks. The resultant models allow us to identify and explore technical variables, developmental trajectories, and morphological switches. Importantly, the model allows us to quantitatively capture morphological plasticity observed with genetically modified strains or strains grown in different media and environments. We envision Candescence as a community meeting point for quantitative explorations of C. albicans morphology. IMPORTANCE The fungus Candida albicans can "shape shift" between 12 morphologies in response to environmental variables. The cytoprotective capacity provided by this polymorphism makes C. albicans a formidable pathogen to treat clinically. Microscopy images of C. albicans colonies can contain hundreds of cells in different morphological states. Manual annotation of images can be difficult, especially as a result of densely packed and filamentous colonies and of technical artifacts from the microscopy itself. Manual annotation is inherently subjective, depending on the experience and opinion of annotators. Here, we built a deep learning approach entitled Candescence to parse images in an automated, quantitative, and objective fashion: each cell in an image is located and labeled with its morphology. Candescence effectively replaces simple rules based on visual phenotypes (size, shape, and shading) with neural circuitry capable of capturing subtle but salient features in images that may be too complex for human annotators.




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