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    "textoCompleto" => "<span class="elsevierStyleSections"><p id="par0005" class="elsevierStylePara elsevierViewall">In a recent issue of <span class="elsevierStyleItalic">Nefrologia</span>&#44; we read the paper of Dr Vega and colleagues entitled &#8220;Study on overhydration in dialysis patients and its association with inflammation&#8221;&#46;<a class="elsevierStyleCrossRef" href="#bib0055"><span class="elsevierStyleSup">1</span></a> We thank for their valuable research evaluating hydration status and body composition in patients on haemodialysis and its relation to inflammation&#46; They found an association between hydration status and low prealbumin &#40;transthyretin&#41; levels&#46; We want to make some comments on transthyretin &#40;TTR&#41; which was assessed in their study&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">Serum TTR has been reported to be a reliable outcome predictor in patients with kidney disease&#46;<a class="elsevierStyleCrossRef" href="#bib0060"><span class="elsevierStyleSup">2</span></a> Previous studies suggested that several factors can affect serum TTR levels&#46; Disorders such as anorexia nervosa&#44; bulimia nervosa&#44; rheumatoid arthritis&#44; ankylosing spondylitis&#44; major depression&#44; trauma&#44; malignancy&#44; protein losing enteropathy&#44; Kawasaki disease&#44; liver diseases&#44; <span class="elsevierStyleItalic">Helicobacter pylori</span> infection and thyroid diseases were shown to alter serum TTR levels&#46;<a class="elsevierStyleCrossRefs" href="#bib0065"><span class="elsevierStyleSup">3&#44;4</span></a> Vega et al&#46; did not mention these contributing diseases in their paper&#46;</p><p id="par0015" class="elsevierStylePara elsevierViewall">Several drugs such as anabolic steroids&#44; corticosteroids&#44; progestational agents&#44; estrogens&#44; antithyroid drugs and nonsteroidal antinflammatory drugs can alter serum TTR levels&#46;<a class="elsevierStyleCrossRefs" href="#bib0075"><span class="elsevierStyleSup">5&#44;6</span></a> Also&#44; dietary supplements such as vitamin A&#44; vitamin C&#44; zinc and omega-3 fatty acids can alter these levels&#46;<a class="elsevierStyleCrossRefs" href="#bib0085"><span class="elsevierStyleSup">7&#44;8</span></a> In this respect&#44; the authors should define whether the participants use any of these drugs and dietary supplements&#46; In addition&#44; alcohol usage is another confounder that should be described whether the participants use&#46;<a class="elsevierStyleCrossRef" href="#bib0095"><span class="elsevierStyleSup">9</span></a></p><p id="par0020" class="elsevierStylePara elsevierViewall">Lastly&#44; we think that body position is essential to state while taking blood specimen&#46; It is recommended that blood specimens for measuring plasma proteins be taken after nearly 15&#8211;20<span class="elsevierStyleHsp" style=""></span>min in the sitting position&#46;<a class="elsevierStyleCrossRef" href="#bib0075"><span class="elsevierStyleSup">5</span></a> Otherwise&#44; concentrations should be evaluated with consideration of position&#46; Lower levels are to be expected in bedridden patients&#46;<a class="elsevierStyleCrossRef" href="#bib0075"><span class="elsevierStyleSup">5</span></a> Therefore&#44; interpretation of results with its current form seems problematic&#46;</p><p id="par0025" class="elsevierStylePara elsevierViewall">Mears and many researchers suggested that serum TTR concentration was not affected by hydration status&#46;<a class="elsevierStyleCrossRef" href="#bib0100"><span class="elsevierStyleSup">10</span></a> In this respect&#44; authors&#8217; claim as association between hydration status and low TTR levels seems suspicious irrespective of taking into account above contributing factors&#46; Clarifying these concerns will provide clearer picture to the readers&#46;</p><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0005">Conflict of interest</span><p id="par0030" class="elsevierStylePara elsevierViewall">The authors declare no conflicts of interest&#46;</p></span></span>"
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Letter to the Editor – Comments on published articles
Is there any association between overhydration and inflammation in dialysis patients?
¿Hay alguna relación entre la sobrehidratación y la inflamación en pacientes en diálisis?
Mehmet Agillia,
Autor para correspondencia
mehmetagilli@yahoo.com

Corresponding author.
, Tolga Doganb, Mustafa Ilker Inanc, Gonca Fidand
a Department of Biochemistry, Agri Military Hospital, Agri, Turkey
b Department of Internal Medicine, Gulhane Military Medical Academy, Ankara, Turkey
c Department of Chest Diseases, Girne Military Hospital, Girne, Cyprus
d Department of Infectious Diseases and Clinical Microbiology, Agri Military Hospital, Agri, Turkey
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        "titulo" => "&#191;Hay alguna relaci&#243;n entre la sobrehidrataci&#243;n y la inflamaci&#243;n en pacientes en di&#225;lisis&#63;"
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    "textoCompleto" => "<span class="elsevierStyleSections"><p id="par0005" class="elsevierStylePara elsevierViewall">In a recent issue of <span class="elsevierStyleItalic">Nefrologia</span>&#44; we read the paper of Dr Vega and colleagues entitled &#8220;Study on overhydration in dialysis patients and its association with inflammation&#8221;&#46;<a class="elsevierStyleCrossRef" href="#bib0055"><span class="elsevierStyleSup">1</span></a> We thank for their valuable research evaluating hydration status and body composition in patients on haemodialysis and its relation to inflammation&#46; They found an association between hydration status and low prealbumin &#40;transthyretin&#41; levels&#46; We want to make some comments on transthyretin &#40;TTR&#41; which was assessed in their study&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">Serum TTR has been reported to be a reliable outcome predictor in patients with kidney disease&#46;<a class="elsevierStyleCrossRef" href="#bib0060"><span class="elsevierStyleSup">2</span></a> Previous studies suggested that several factors can affect serum TTR levels&#46; Disorders such as anorexia nervosa&#44; bulimia nervosa&#44; rheumatoid arthritis&#44; ankylosing spondylitis&#44; major depression&#44; trauma&#44; malignancy&#44; protein losing enteropathy&#44; Kawasaki disease&#44; liver diseases&#44; <span class="elsevierStyleItalic">Helicobacter pylori</span> infection and thyroid diseases were shown to alter serum TTR levels&#46;<a class="elsevierStyleCrossRefs" href="#bib0065"><span class="elsevierStyleSup">3&#44;4</span></a> Vega et al&#46; did not mention these contributing diseases in their paper&#46;</p><p id="par0015" class="elsevierStylePara elsevierViewall">Several drugs such as anabolic steroids&#44; corticosteroids&#44; progestational agents&#44; estrogens&#44; antithyroid drugs and nonsteroidal antinflammatory drugs can alter serum TTR levels&#46;<a class="elsevierStyleCrossRefs" href="#bib0075"><span class="elsevierStyleSup">5&#44;6</span></a> Also&#44; dietary supplements such as vitamin A&#44; vitamin C&#44; zinc and omega-3 fatty acids can alter these levels&#46;<a class="elsevierStyleCrossRefs" href="#bib0085"><span class="elsevierStyleSup">7&#44;8</span></a> In this respect&#44; the authors should define whether the participants use any of these drugs and dietary supplements&#46; In addition&#44; alcohol usage is another confounder that should be described whether the participants use&#46;<a class="elsevierStyleCrossRef" href="#bib0095"><span class="elsevierStyleSup">9</span></a></p><p id="par0020" class="elsevierStylePara elsevierViewall">Lastly&#44; we think that body position is essential to state while taking blood specimen&#46; It is recommended that blood specimens for measuring plasma proteins be taken after nearly 15&#8211;20<span class="elsevierStyleHsp" style=""></span>min in the sitting position&#46;<a class="elsevierStyleCrossRef" href="#bib0075"><span class="elsevierStyleSup">5</span></a> Otherwise&#44; concentrations should be evaluated with consideration of position&#46; Lower levels are to be expected in bedridden patients&#46;<a class="elsevierStyleCrossRef" href="#bib0075"><span class="elsevierStyleSup">5</span></a> Therefore&#44; interpretation of results with its current form seems problematic&#46;</p><p id="par0025" class="elsevierStylePara elsevierViewall">Mears and many researchers suggested that serum TTR concentration was not affected by hydration status&#46;<a class="elsevierStyleCrossRef" href="#bib0100"><span class="elsevierStyleSup">10</span></a> In this respect&#44; authors&#8217; claim as association between hydration status and low TTR levels seems suspicious irrespective of taking into account above contributing factors&#46; Clarifying these concerns will provide clearer picture to the readers&#46;</p><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0005">Conflict of interest</span><p id="par0030" class="elsevierStylePara elsevierViewall">The authors declare no conflicts of interest&#46;</p></span></span>"
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