Goldis Malek

Prof. Goldis Malek

Duke University School of Medicine, Durham, North Carolina, USA
orcid

Research Focus & Metrics

Academic Career Length

27Years (2000-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 March 2010 in Progress in Retinal and Eye Research
Verified
Journal Article
Closed access
DADon H. Anderson
Don H. Anderson
MRMonte J. Radeke
Monte J. Radeke
NGNatasha B. Gallo
Natasha B. Gallo
ECEthan A. Chapin
Ethan A. Chapin
PJPatrick T. Johnson
Patrick T. Johnson
LJLincoln V. Johnson
Lincoln V. Johnson

1 February 2010 in Ophthalmology
Verified
Journal Article
Closed access
SZSandrine A. Zweifel
Sandrine A. Zweifel
RSRichard F. Spaide
Richard F. Spaide
CCChristine A. Curcio
Christine A. Curcio
GMGoldis Malek
Goldis Malek
YIYutaka Imamura
Yutaka Imamura

1 February 2003 in The American Journal of Pathology
Verified
Journal Article
Closed access
GMGoldis Malek
Goldis Malek
CLChuan-Ming Li
Chuan-Ming Li
CGClyde Guidry
Clyde Guidry
NMNancy E. Medeiros
Nancy E. Medeiros
CCChristine A. Curcio
Christine A. Curcio

1 December 2005 in Experimental Eye Research
Verified
Journal Article
Closed access
CCChristine A. Curcio
Christine A. Curcio
JPJ. Brett Presley
J. Brett Presley
GMGoldis Malek
Goldis Malek
NMNancy E. Medeiros
Nancy E. Medeiros
DADina V. Avery
Dina V. Avery
HKHoward S. Kruth
Howard S. Kruth

1 November 2008 in Experimental Eye Research
Verified
Journal Article
Closed access
MRMartin Rudolf
Martin Rudolf
GMGoldis Malek
Goldis Malek
JMJeffrey D. Messinger
Jeffrey D. Messinger
MCMark E. Clark
Mark E. Clark
LWLan Wang
Lan Wang
CCChristine A. Curcio
Christine A. Curcio

1 July 2005 in Investigative Ophthalmology & Visual Science
Verified
Journal Article
Closed access
PDF file
CLChuan-Ming Li
Chuan-Ming Li
BCByung Hong Chung
Byung Hong Chung
JPJ. Brett Presley
J. Brett Presley
GMGoldis Malek
Goldis Malek
XZXueming Zhang
Xueming Zhang
CCChristine A. Curcio
Christine A. Curcio
Purpose. To isolate and characterize cholesteryl ester-containing, lipoprotein-like particles (LLPs) from normal aged human Bruch’s membrane (BrM)/choroid (Ch). methods. From BrM/Ch of 20 eyes of 10 donors aged >60 years, LLPs were released by high-salt buffer, fractionated by density gradient ultracentrifugation, and characterized by determining cholesterol, triglyceride, and phospholipid concentration (by enzymatic colorimetry and fluorometry); cholesteryl ester composition (by electrospray ionization mass spectrometry, ESI/MS); and particle morphology (by negative stain electron microscopy). Apolipoprotein (apo) gene expression was determined with RT-PCR, Western blot analysis, and immunofluorescence of retinal–choroidal cryosections. In paraformaldehyde-preserved eyes (20 eyes of 20 donors), cholesteryl ester composition of BrM/Ch, cornea, and sclera was determined by ESI/MS. results. A pooled fraction of LLP released from BrM/Ch (concentrated total LLP, density [d] < 1.24 g/mL fraction) was fractionated into two peaks. A large Peak 1 (with plasma LDL-HDL density range), containing predominantly phospholipid and unesterified cholesterol, was morphologically heterogeneous. A small Peak 2 (with plasma VLDL density range), enriched with esterified cholesterol, contained ∼100 nm diameter round electron-lucent particles. Both peaks contained apoB and apoA-I, RPE and retina contained apoA-I mRNA transcripts, and BrM and drusen contained apoA-I immunoreactivity. Peaks 1 and 2, native RPE, and fresh BrM/Ch were cholesteryl linoleate enriched and contained little cholesteryl docosahexaenoate. Preserved BrM/Ch was cholesteryl oleate-enriched, unlike sclera and cornea. conclusions. BrM/Ch LLP do not resemble plasma lipoproteins in density profile, cholesterol distribution, or morphology. Peak 2 contains EC-rich LLP resembling BrM particles in situ. BrM/Ch cholesteryl esters respond to long-term storage differently than esters of plasma lipoprotein origin accumulated in other ocular tissues. Evidence of intraocular apoB and apoA-I expression supports an emerging hypothesis that the RPE assembles and secretes a large, possibly novel, lipoprotein particle.