Abstract
Abdominal fat has been recognized as the most hormonally active tissue secreting a variety of adipocytokines and, therefore, potentially contributing to inflammation. The conicity index (Cindex) has been considered a valuable indicator of central obesity. This study aims to relate plasma concentrations of leptin, adiponectin, interleukin-6 (IL-6), and serum C-reactive protein (CRP) with Cindex values in hemodialysis (HD) patients. Cross-sectional study in 45 HD patients (55.6 % men; DM 20 %; mean age, 68.1 year). Cindex and nutritional-inflammatory markers were used for the abdominal fat depot assessment. Patients were classified as having a low or high median Cindex (MCindex): low group (men, <1.39; women, <1.33) and high group (men, ≥1.39; women, ≥1.33). A combination of plasma leptin, IL-6, adiponectin, and CRP was used to design an inflammatory index (Iindex) while a protein-energy wasting index (PEWindex) was calculated from the Iindex plus the malnutrition-inflammation score (MIS). Waist circumference (WC) and Cindex but not BMI were significantly higher in men than in women (p < 0.01). The MCindex was significantly associated with the adipocytokine profile (CRP, leptin, and adiponectin). Patients with a high MCindex had a higher Iindex and PEWindex (p < 0.01). ROC curve analyses measured by area under the curve (AUC) were 0.69 and 0.68 (p < 0.05), for the Cindex and MCindex, respectively, demonstrating the usefulness of the Cindex as an abdominal fat mass biomarker able for wasting-inflamed HD patients. These findings in HD patients underscore the importance of incorporating the evaluation of one abdominal fat indicator, such as the Cindex and an inflammatory biomarker such as the IL-6 and CRP, in substitution of the BMI, in current clinical practice.
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Abbreviations
- AUC:
-
Area under curve
- BIVA:
-
Bioimpedance vector analysis
- BMI:
-
Body mass index
- Cindex :
-
Conicity index
- CKD:
-
Chronic kidney disease
- CRP:
-
C-reactive protein
- CVD:
-
Cardiovascular disease
- ESRD:
-
End-stage renal disease
- HD:
-
Hemodialysis
- FM:
-
Fat mass
- FMI:
-
Fat mass index
- Iindex :
-
Inflammatory index
- IL-6:
-
Interleukin-6
- Kt/V urea (sp):
-
Single pool urea kinetic model
- LBM:
-
Lean body mass
- LBMI:
-
Lean body mass index
- MIS:
-
Malnutrition-inflammation score
- PEW:
-
Protein-energy wasting
- PEWindex :
-
Protein-energy wasting index
- TNF-α:
-
Tumor necrosis alpha
- WC:
-
Waist circumference
- WHR:
-
Waist-height ratio
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This observational, descriptive, and cross-sectional study was conducted in accordance with Declaration of Helsinki and was approved by the Ethics Committee at Hospital Universitario La Princesa, Madrid (Spain). Informed consent was obtained from each patient prior inclusion at the study.
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All authors have significantly contributed to the paper, had access to all study data, and approved the final version of the manuscript to be submitted for publication. MR is the corresponding author and guarantor of the paper and has contributed to the study design, data discussion, and writing of the paper. FJS-M Mhascon tributed to data analysis and discussion and review of writing of the paper and GB have contributed to the data analysis of the paper.
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The authors declare that they have no conflict of interest.
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Ruperto, M., Barril, G. & Sánchez-Muniz, F.J. Usefulness of the conicity index together with the conjoint use of adipocytokines and nutritional-inflammatory markers in hemodialysis patients. J Physiol Biochem 73, 67–75 (2017). https://doi.org/10.1007/s13105-016-0525-1
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DOI: https://doi.org/10.1007/s13105-016-0525-1