Greetings... this is a little off the thread topic but relevant to many of the comments in the thread.
"G" over at TrackYourPlaque.com posted the following article links recently. The essential point goes like this...
- There is agreement that Small-Dense LDL Particle Number is a high correlated independent risk factor for CAD. I don't have time to dig out the references for this but these can be found in many places.
- The log of the ratio of Triglycerides to HDL is INVERSELY but significantly correlated with Small LDL Size.
- In short, what matters is NOT the LDL to HDL ratio but, instead, the TRI to HDL ratio.
I put together a google spreadsheet that computes this Artherogenic Index of Plasma (AIP) here:
http://spreadsheets....Ob53d5A1TzZrWMwIn one of the linked articles, the authors state...
"A practical advantage of using AIP is that its values range from negative to positive with ZERO closely corresponding to the LDL diamter of 25.5 nm, ie the size that was used as as cutoff between LDL patterns A and B."
A NEGATIVE AIP VALUE IS BETTER THAN A POSITIVE VALUE.I haven't spent a lot of time looking in detail at the articles. I thought it would be useful to reference them here for ImmInst discussion.
The real value of this material is that, if the correlation of the AIP ratio to LDL Particle Size is as high as some of the articles state, then, measures of LDL particle size can be estimated more easily than can particle size blood testing be had.
Real thanks go to "G" who knows who she is and deserves thanks for digging this information up.
Comments, critique, and insight welcome!
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** Dobiásová M, Frohlich J. The plasma parameter log (TG/HDL-C) as an atherogenic index: correlation with lipoprotein particle size and esterification rate in apoB-lipoprotein-depleted plasma (FER(HDL)).
Clin Biochem. 2001 Oct;34(7):583-8.
PMID: 11738396 [PubMed - indexed for MEDLINE]
Frohlich J, Dobiásová M. Fractional esterification rate of cholesterol and ratio of triglycerides to HDL-cholesterol are powerful predictors of positive findings on coronary angiography.
Clin Chem. 2003 Nov;49(11):1873-80.
PMID: 14578319 [PubMed - indexed for MEDLINE]
Dobiásová M, Raslová K, Rauchová H, Vohnout B, Ptácková K, Frohlich J. Atherogenic lipoprotein profile in families with and without history of early myocardial infarction.
Physiol Res. 2001;50(1):1-8.
PMID: 11300220 [PubMed - indexed for MEDLINE]
Dobiásová M. [AIP--atherogenic index of plasma as a significant predictor of cardiovascular risk: from research to practice]
Vnitr Lek. 2006 Jan;52(1):64-71. Review. Czech.
PMID: 16526201 [PubMed - indexed for MEDLINE]
Ohta T, Kakiuti Y, Kurahara K, Saku K, Nagata N, Matsuda I. Fractional esterification rate of cholesterol in high density lipoprotein is correlated with low density lipoprotein particle size in children.
J Lipid Res. 1997 Jan;38(1):139-46.
PMID: 9034208 [PubMed - indexed for MEDLINE]
Ohta T, Saku K, Takata K, Nagata N, Maung KK, Matsuda I. Fractional esterification rate of cholesterol in high density lipoprotein (HDL) can predict the particle size of low density lipoprotein and HDL in patients with coronary heart disease.
Atherosclerosis. 1997 Dec;135(2):205-12.
PMID: 9430370 [PubMed - indexed for MEDLINE]
Berneis K, Jeanneret C, Muser J, Felix B, Miserez AR. Low-density lipoprotein size and subclasses are markers of clinically apparent and non-apparent atherosclerosis in type 2 diabetes.
Metabolism. 2005 Feb;54(2):227-34.
PMID: 15690318 [PubMed - indexed for MEDLINE]
Maruyama C, Imamura K, Teramoto T. Assessment of LDL particle size by triglyceride/HDL-cholesterol ratio in non-diabetic, healthy subjects without prominent hyperlipidemia.
J Atheroscler Thromb. 2003;10(3):186-91.
PMID: 14564088 [PubMed - indexed for MEDLINE]
Goff DC Jr, D'Agostino RB Jr, Haffner SM, Otvos JD.Insulin resistance and adiposity influence lipoprotein size and subclass concentrations. Results from the Insulin Resistance Atherosclerosis Study.
Metabolism. 2005 Feb;54(2):264-70.
PMID: 15690322 [PubMed - indexed for MEDLINE]
Green TJ, Moghadasian MH. Species-related variations in lipoprotein metabolism: the impact of FER(HDL) on susceptibility to atherogenesis.
Life Sci. 2004 Mar 26;74(19):2441-9.
PMID: 14998721 [PubMed - indexed for MEDLINE]
Edited by wccaguy, 19 July 2008 - 09:13 PM.