Abstract
General tendencies in the regulation of gene expression during atherogenesis were investigated using correlation analysis for 34 mRNA species of several functional groups. The contents of mRNA were measured by quantitative PCR in samples of human aortal intima containing no lesions or atherosclerotic lesions of types I (initial lesions), II (fatty streaks), and Va (fibroatheromas). The coupling between mRNA contents in lesions and the same mRNAs in intact tissue was found to descend in the course of the disease progression. The data are in accordance with the opinion that successive morphologic types of atherosclerotic lesions correspond to steps of atherogenesis. In addition, the contents of individual mRNA species could correlate with each other within the given sample type, the extent of this coupling rising along with the disease progression. The exception from this rule was a collapse in coupling for several functional groups of mRNA in lesions of type I. This collapse could indicate special position of these lesions in pathogenesis. Statistically significant correlations between mRNAs found in samples of all four types comprised in total about 50% of all possible correlations. 66% of these correlations were conservative, i.e. observed in at least two sample types. By coupling-strength, the studied mRNAs could be divided into four clusters whose composition significantly varied along with the disease progression. The disease progression was also associated with decline in number of regulatory factors that determine coordination in expression of the analyzed genes.
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Abbreviations
- ABCA1 and ABCG1:
-
ATP-binding cassette transporters A1 and G1
- ACAT1:
-
acyl-CoA-cholesterol acyltransferase 1
- ApoE:
-
apolipoprotein E
- AR:
-
androgen receptor
- Arom:
-
aromatase
- CCL18:
-
C-C motif-containing chemokine 18
- CD36, CD63, and CD68:
-
differentiation clusters 36, 63, and 68
- CEH:
-
cholesteryl ester neutral hydrolase
- EEA1:
-
early endosome antigen 1
- ERα:
-
estrogen receptor alpha
- EST:
-
estrogen sulfotransferase
- GAPDH:
-
glyceraldehyde-3-phosphate dehydrogenase
- GNB2L1:
-
guanine nucleotide-binding protein, beta-peptide 2-like 1
- ICAM1:
-
intercellular adhesion molecule 1
- Lamp 1/2:
-
lysosome-associated membrane glycoproteins 1 and 2
- LDLR:
-
low density lipoprotein receptor
- LXRα and LXRβ:
-
liver X receptors alpha and beta
- p62:
-
ubiquitin-binding protein p62
- PPARα and PPARγ:
-
peroxisome proliferator-activated receptors alpha and gamma
- Rab5a:
-
Ras-related small GTPase 5A
- SELE:
-
selectin E
- SR-A:
-
scavenger receptor A
- SR-BI:
-
scavenger receptor BI
- SREBP1 and SREBP2:
-
sterol regulatory element-binding proteins 1 and 2
- STS:
-
steroid sulfatase
- TfR1:
-
transferrin receptor 1
- TLR4:
-
Toll-like receptor 4
- TNFα:
-
tumor necrosis factor alpha
- VCAM1:
-
vascular cell adhesion molecule 1
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Published in Russian in Biokhimiya, 2013, Vol. 78, No. 8, pp. 1187–1200.
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Shchelkunova, T.A., Morozov, I.A., Rubtsov, P.M. et al. Coordination in gene expression during atherogenesis. Biochemistry Moscow 78, 933–945 (2013). https://doi.org/10.1134/S0006297913080117
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DOI: https://doi.org/10.1134/S0006297913080117