Document Detail

Monocyte angiotensin converting enzyme expression may be associated with atherosclerosis rather than arteriosclerosis in hemodialysis patients.
MedLine Citation:
PMID:  21127137     Owner:  NLM     Status:  MEDLINE    
BACKGROUND AND OBJECTIVES: Circulating monocytes can be divided into functionally distinct subpopulations according to their surface expression of CD14 and CD16. Monocytes with high-level expression of both antigens (CD14(++)CD16(+), Mo2 cells) are associated with cardiovascular morbidity and mortality in hemodialysis patients. These cells express angiotensin converting enzyme (ACE) on their surface. They are involved in the association of chronic inflammation and cardiovascular disease in kidney patients. Cardiovascular morbidity results from atherosclerosis (plaque-forming, vessel occluding disease) and arteriosclerosis (loss of arterial dampening function). It is unknown whether ACE-expressing proinflammatory monocytes are related to atherosclerosis, arteriosclerosis, or both.
DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: During baseline examination for a prospective study on monocyte ACE expression and mortality, 60 chronic hemodialysis patients of an academic outpatient center were screened for atherosclerosis by carotid artery ultrasound, for arteriosclerosis by pulse pressure measurement, and for ACE expression on Mo2 cells by flow cytometry.
RESULTS: ACE expression on Mo2 monocytes was significantly higher in patients with severe compared with those with little or no carotid atherosclerosis. Mo2 ACE correlated with a score to semiquantify atherosclerosis and remained a significant predictor of carotid plaques in multivariate analysis including the other univariately associated variables of age, hemoglobin A1c, and albumin. Mo2 ACE was not related to pulse pressure.
CONCLUSIONS: ACE expression on Mo2, although being a known predictor of mortality and cardiovascular disease in end-stage renal disease patients, may act via enhancement of atherosclerosis rather than arteriosclerosis.
Christof Ulrich; Eric Seibert; Gunnar H Heine; Danilo Fliser; Matthias Girndt
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Publication Detail:
Type:  Journal Article     Date:  2010-12-02
Journal Detail:
Title:  Clinical journal of the American Society of Nephrology : CJASN     Volume:  6     ISSN:  1555-905X     ISO Abbreviation:  Clin J Am Soc Nephrol     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-03-17     Completed Date:  2011-06-30     Revised Date:  2013-07-03    
Medline Journal Info:
Nlm Unique ID:  101271570     Medline TA:  Clin J Am Soc Nephrol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  505-11     Citation Subset:  IM    
Department of Internal Medicine II, Martin Luther University, Halle-Wittenberg, Germany.
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MeSH Terms
Academic Medical Centers
Aged, 80 and over
Antigens, CD14 / blood
Arteriosclerosis / diagnosis,  enzymology,  etiology*,  physiopathology
Atherosclerosis / enzymology,  etiology*,  ultrasonography
Blood Pressure
Carotid Artery Diseases / enzymology*,  etiology,  physiopathology,  ultrasonography
Flow Cytometry
GPI-Linked Proteins / blood
Kidney Failure, Chronic / complications,  therapy*
Linear Models
Middle Aged
Monocytes / enzymology*,  immunology
Peptidyl-Dipeptidase A / blood*
Prospective Studies
Pulsatile Flow
Receptors, IgG / blood
Renal Dialysis* / adverse effects
Reg. No./Substance:
0/Antigens, CD14; 0/FCGR3B protein, human; 0/GPI-Linked Proteins; 0/Receptors, IgG; EC A

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