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Low-density lipoprotein cholesterol estimation by the Anandaraja's formula – confirmation

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Abstract

The number of the indirect methods for LDL-C estimation is growing. Our result support the reliability of new Anandaraja's formula for low-density lipoprotein estimation from total cholesterol and triglycerides.

Gazi et al [1] presented results of evaluation the accuracy of various formulas for the calculation of low-density lipoprotein cholesterol (LDL-C) levels – indirect methods – in patients with the metabolic syndrome. LDL-C according Friedewald's formula showed significant differences from other formulas in the total cohort, as well as in patients with metabolic syndrome. Different plasma lipid and lipoprotein analytical techniques – direct methods, however, yield results, which are highly correlated, yet significantly different, too [2].

It is possible to supplement next calculation. Anandaraja et al [3] published new formula for LDL-C estimation from two other parameters, total cholesterol and triglycerides, as substitution to well known Friedewald's formula.

Our team recently compared two methods of estimation of low-density lipoprotein cholesterol, the direct Wako method versus Friedewald's formula [4]. We studied over 10 000 consecutive patients with different diseases, from mixed rural and urban Brazil population.

We re-counted our data with Anandaraja's formula. Main results are expressed in Table 1. Direct LDL-C and LDL-C calculated from Anandaraja's formula shows substantial better correlation in both total population (r = 0,969) and patients with triglyceride <350 mg/dl (r = 0,974) by comparison with calculated according to the Friedewald's formula (r = 0,924 and r = 0,935).

Table 1 Low-density lipoprotein cholesterol level

In each very low-density lipoprotein particle secreted from the liver, and therefore in each intermediate-density lipoprotein, low-density lipoprotein and lipoprotein (a) particles, a single molecule of apolipoprotein B (apo B) is present from the time of its assembly to its catabolism, which does not exchange between lipoproteins. More than 90% of apo B is in the low-density lipoprotein particles, and therefore, plasma total concentration of apo B can be considered as a measure of the number of atherogenic particles. New Anandaraja's equation takes into account only total cholesterol and triglycerides. Some authors recommend including apo B measurement as acomponent of the standard lipoprotein measurements performed to assess cardiovascular disease risk [5]. Contribution of LDL-C calculation with help of measured apo B is questionable. Apo B is real an independent risk factor.

In conclusion, LDL-C is the major indicator for initial classification of coronary heart disease risk status and lowering its level is a primary goal of therapy. The NCEP Working Group on Lipoprotein Measurement recommended the development of accurate direct low-density lipoprotein cholesterol methods. All available direct methods have yet limitations for general use. Our results support the reliability of Anandaraja's formula as indirect low-density lipoprotein cholesterol estimation – originally used in Indian population – in Brazil population, too.

References

  1. 1.

    Gazi I, Tsimihodimos V, Filippatos TD, Saougos VG, Bairaktari ET, Tselepis AD, Elisaf M: LDL cholesterol estimation in patients with the metabolic syndrome. Lipids in Health and Disease. 2006, 5: 8 doi:10.1186/1476-511X-5-8

  2. 2.

    Davy BM, Davy KP: Comparison of assessment techniques: plasma lipid and lipoproteins related to the metabolic syndrome. Lipids in Health and Disease. 2006, 5:3 doi:10.1186/1476-511X-5-3

  3. 3.

    Anandaraja S, Narang R, Godeswar R, Laksmy R, Talwar KK: Low-density lipoprotein cholesterol estimation by a new formula in Indian population. Int J Cardiol. 2005, 102: 117-120. 10.1016/j.ijcard.2004.05.009

  4. 4.

    Gasko R, de Cordova CMM, Klimova E, Hefler CMR, Schoonjans F: LDL-cholesterol 2005 – Method comparison study between Friedewald's formula and direct Wako method: Design of study and basic conclusions. Klin Biochem Metab. 2005, 13: 190-196. (In Slovak)

  5. 5.

    Barter PJ, Ballantyne CM, Carmena R, Castro Cabezas M, John Chapman M, Couture P: Apo B versus cholesterol in estimating cardiovascular risk and in guiding therapy: report of the thirty-person/ten-country panel. J Int Med. 2006, 259: 247-258. 10.1111/j.1365-2796.2006.01616.x.

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Acknowledgements

I would like to thank to the contributions Prof de Cordova, University of Blumenau, Blumenau, State Santa Catarina, Brazil.

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Correspondence to Rudolf Gasko.

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This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Gasko, R. Low-density lipoprotein cholesterol estimation by the Anandaraja's formula – confirmation. Lipids Health Dis 5, 18 (2006) doi:10.1186/1476-511X-5-18

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Keywords

  • Coronary Heart Disease Risk
  • Brazil Population
  • Plasma Total Concentration
  • Atherogenic Particle
  • Lipoprotein Measurement