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Title: Does phase angle correlate with hyperhomocysteinemia? A study of patients with classical homocystinuria
Authors: Poloni, Soraia
Schweigert Perry, Ingrid D.
D'Almeida, Vania [UNIFESP]
Schwartz, Ida V. D.
Hosp Clin Porto Alegre
Univ Fed Rio Grande do Sul
Universidade Federal de São Paulo (UNIFESP)
Keywords: Hyperhomocysteinemia
Phase angle
Classical homocystinuria
Issue Date: 1-Jun-2013
Publisher: Churchill Livingstone
Citation: Clinical Nutrition. Edinburgh: Churchill Livingstone, v. 32, n. 3, p. 479-480, 2013.
Abstract: The role of the phase angle in hyperhomocysteinemia has yet to be assessed. Classical homocystinuria is a rare genetic disease characterized by severe hyperhomocysteinemia, as well as increased levels of methionine and reduced levels of cysteine.The objective of this study was to investigate the potential relationship between phase angle and homocysteine, cysteine, and methionine levels in patients with classical homocystinuria.Eight patients were included in the study. Phase angle was measured with a tetrapolar bioimpedance analyzer. Serum homocysteine, cysteine, and methionine levels were measured by HPLC.Only three patients had adequate metabolic control of their disease. Median phase angle was 5.9 degrees (range = 5.4 degrees-8.5 degrees. There was a significant correlation between phase angle and levels of homocysteine (r = 0.807, p = 0.015), methionine (r = 0.711, p = 0.048), and cysteine (r = 0.836, p = 0.010). Was also positively correlated with BMI and arm muscle circumference (p < 0.05). Two patients had phase angles below the 5th percentile, and only one above the 50th percentile.Our findings suggest that cellular integrity is affected in patients with high homocysteine levels, thus indicating that phase angle could be a valuable indicator of prognosis and classical homocystinuria. It also suggests a role for this indicator in other forms of hyperhomocysteinemia and other inborn errors of metabolism. (C) 2012 Elsevier Ltd and European Society for Clinical Nutrition and Metabolism. All rights reserved.
ISSN: 0261-5614
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