Publications by authors named "Clara J Lee"

2 Publications

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Seven new loci associated with age-related macular degeneration.

Nat Genet 2013 Apr 3;45(4):433-9, 439e1-2. Epub 2013 Mar 3.

Institute of Human Genetics, University of Regensburg, Regensburg, Germany.

Age-related macular degeneration (AMD) is a common cause of blindness in older individuals. To accelerate the understanding of AMD biology and help design new therapies, we executed a collaborative genome-wide association study, including >17,100 advanced AMD cases and >60,000 controls of European and Asian ancestry. We identified 19 loci associated at P < 5 × 10(-8). These loci show enrichment for genes involved in the regulation of complement activity, lipid metabolism, extracellular matrix remodeling and angiogenesis. Our results include seven loci with associations reaching P < 5 × 10(-8) for the first time, near the genes COL8A1-FILIP1L, IER3-DDR1, SLC16A8, TGFBR1, RAD51B, ADAMTS9 and B3GALTL. A genetic risk score combining SNP genotypes from all loci showed similar ability to distinguish cases and controls in all samples examined. Our findings provide new directions for biological, genetic and therapeutic studies of AMD.
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http://dx.doi.org/10.1038/ng.2578DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3739472PMC
April 2013

Cloning and partial characterization of a novel hemolysin gene of Vibrio tubiashii and the development of a PCR-based detection assay.

Can J Microbiol 2011 Sep 19;57(9):714-21. Epub 2011 Aug 19.

MOD-1 Facility, Virulence Mechanisms Branch, (HFS-025), Division of Virulence Assessment, Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, US Food and Drug Administration, 8301 Muirkirk Road, Laurel, MD 20708, USA.

Vibrio tubiashii expresses virulence factors, such as a vulnificolysin-like hemolysin or cytolysin and a zinc metalloprotease, similar to those of other pathogenic vibrios. In this study, we report the cloning of a novel hemolysin gene of V. tubiashii in Escherichia coli . A V. tubiashii gene library was screened for hemolytic activity on sheep blood agar. Three hemolytic clones pGem:hly1, pGem:hly2, and pGem:hly3 were sequenced, and the sequences showed a strong homology to the ribA gene coding for guanosine triphosphate cyclohydrolase II (GCH II), required for riboflavin biosynthesis and reported to be responsible for hemolytic activity in Helicobacter pylori . The plasmids pGem:hly1 and pGem:hly3 when introduced into E. coli BSV18 (ribA18::Tn5) were able to restore growth of strain BSV18 in a medium without riboflavin and also produced hemolytic activity on blood agar. PCR primers based on the cloned hly-ribA sequence were tested using 23 different Vibrio strains representing 10 different species. Amplification of ribA gene locus only occurred with V. tubiashii strains. In summary, our results indicate that we have cloned a ribA homolog of V. tubiashii that imparts hemolytic activity to E. coli clones, and primers based on this gene locus might be useful as a species-specific identification tool for V. tubiashii.
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http://dx.doi.org/10.1139/w11-058DOI Listing
September 2011