Association of serum phospholipid PUFAs with cardiometabolic risk: beneficial effect of DHA on the suppression of vascular proliferation/inflammation.
OBJECTIVE
Blood or dietary polyunsaturated fatty acids (PUFAs), particularly ω3-PUFAs were known for cardiovascular protective effect. However, the results are still controversial. We aimed to investigate the association of serum phospholipid PUFAs with cardiometabolic risk through cross-sectional/experimental studies.


METHODS
Serum phospholipid FA compositions and cardiometabolic risk parameters were measured in controls [healthy: n=987, metabolic syndrome (MetS): n=214] and CAD patients (CAD-only: n=152, CAD+MetS: n=56). Experimental assays were performed in vascular smooth muscle cells (VSMCs).


RESULTS
Major cardiometabolic risk markers, i.e. insulin resistance, hs-C-reactive proteins, and malondialdehyde were higher, and adiponectin and LDL particle size were lower in CAD patients, particularly those with MetS than in healthy controls. Serum linoleic acid (LA, C18:2ω-6) was lowest and dihomo-γ-linolenic acids (DGLAs, C20:3ω-6) were highest in CAD patients with MetS among the 4 groups. Docosahexaenoic acid (DHA, C22:6ω-3) was lower and arachidonic acid (AA, C20:4ω-6) and ω6/ω3-PUFAs were higher in CAD patients than in controls. ω3-PUFAs were significantly lower in CAD patients, particularly those with MetS than in healthy controls. Multiple regression analysis revealed that AA and DHA among serum FAs were mainly associated with the cardiometabolic risk (β'-coefficients for AA:0.336; DHA: -0.296) together with age, MetS factors, LA, DGLA and gender (r=0.529, p<0.001). Under LPS-induced stress condition, LA and DHA significantly suppressed VSMC proliferation. DHA also up-regulated the phosphorylation of p38 and ERK, and dramatically inhibited nuclear translocation of NF-κB-p65 in VSMCs.


CONCLUSIONS
AA and DHA were mainly associated with cardiometabolic risk. Particularly, DHA may be effective on suppression of vascular proliferation and inflammation.
Interdisciplinary Course of Science for Aging, Yonsei University, Seoul, Republic of Korea.
Juhyun
J
Song
Department of Food and Nutrition, Yonsei University, Seoul, Republic of Korea.
Nayeon
N
Kwon
Department of Food and Nutrition, Yonsei University, Seoul, Republic of Korea.
Mi-Hyang
MH
Lee
Division of Cardiology, Severance Cardiovascular Hospital, Yonsei University Health System, Seoul, Republic of Korea.
Young-Guk
YG
Ko
Department of Food and Nutrition, Yonsei University, Seoul, Republic of Korea. Electronic address: jhleeb@yonsei.ac.kr.
Jong Ho
JH
Lee
Department of Food Science and Nutrition, Dong-A University, Busan, Republic of Korea. Electronic address: oykim@dau.ac.kr.
Oh Yoen
OY
Kim
D015415:Biomarkers / Q000378:metabolism; D002318:Cardiovascular Diseases / Q000097:blood*; D016022:Case-Control Studies; D002467:Cell Nucleus / Q000187:drug effects / Q000378:metabolism; D004281:Docosahexaenoic Acids / Q000494:pharmacology*; D005260:Female; D006801:Humans; D007249:Inflammation / Q000097:blood / Q000473:pathology; D008070:Lipopolysaccharides / Q000494:pharmacology; D020935:MAP Kinase Signaling System / Q000187:drug effects; D008297:Male; D024821:Metabolic Syndrome / Q000097:blood*; D008875:Middle Aged; D009131:Muscle, Smooth, Vascular / Q000473:pathology*; D032389:Myocytes, Smooth Muscle / Q000187:drug effects / Q000473:pathology; D018384:Oxidative Stress / Q000187:drug effects; D010743:Phospholipids / Q000097:blood*; D021381:Protein Transport / Q000187:drug effects; D012044:Regression Analysis; D012307:Risk Factors; D051996:Transcription Factor RelA / Q000378:metabolism
D015415:Biomarkers; D008070:Lipopolysaccharides; D010743:Phospholipids; D051996:Transcription Factor RelA; D004281:Docosahexaenoic Acids
Cardiometabolic risk; Docosahexaenoic acid; MAPK pathways; Nuclear factor-κB p65 nuclear translocation; Polyunsaturated fatty acids; Vascular proliferation