Επίπεδα της πρωτεΐνης klotho σε πρόωρα νεογνά

 
This item is provided by the institution :

Repository :
National Archive of PhD Theses
see the original item page
in the repository's web site and access all digital files if the item*
share



PhD thesis (EN)

2012 (EN)

Επίπεδα της πρωτεΐνης klotho σε πρόωρα νεογνά

Γαρατζιώτη, Μαρία
Garatzioti, Maria

Klotho, a protein with anti-aging properties, regulates phosphate, calcium and bonemetabolism, induces resistance against oxidative stress and may participate in insulinsignalling. Neonates, especially preterm ones, are prone to metabolic disturbances andoxidative stress. The role of kltho in neonates is not known.The objective of this prospective study was to evaluate circulating klothoconcentrations in preterm and full-term neonates and unravel possible correlationswith growth, metabolism and indices of oxidative stress.Plasma Klotho levels were determined by specific ELISA in 50 healthy neonates (25preterm, mean [SD] gestational age 33.7 [1.1] weeks and 25 full-term infants) at days14 and 28 of life. Associations of Klotho with anthropometric (body weight andlength) and metabolic parameters (serum calcium, phosphate, 1,25-dihydroxy-vitaminD, parathormone, FGF23, glucose, insulin, homeostasis model assessment index ofinsulin resistance [HOMA-IR]), and indices of oxidative stress (malonyldialdehyde[MDA] concentration and superoxide dismutase activity) were examined.Statistical analysis led to the following results:1. Plasma Klotho levels are significantly higher in full-term than preterm infantsat both days 14 (1099 [480] pg/mL vs. 884 [239] pg/mL, respectively; P<0.05) and 28(1277 [444] pg/mL vs. 983 [264] pg/mL, respectively; P<0.01).2. In both preterm and full-term infants, Klotho levels increase significantly fromday 14 to 28 of life (P<0.001).3. Circulating -Klotho concentrations correlate with gestational age (r=0.32,P=0.001), body weight (r=0.34, p=0.001), body length (r=0.33, P=0.001), 1,25-dihydroxy-vitamin D level (r=0.24, P<0.05) and MDA level (r=0.20, P<0.05), but notwith glucose, insulin, or HOMA-IR values.In conclusion, plasma klotho levels rise as gestational and postnatal age advance inneonates and may have an impact on vitamin D metabolism and oxidative stress.Whether klotho may have a role in the regulation of infants’ growth needs to befurther studied.

PhD Thesis

Basic Medicine
Medical and Health Sciences
Μεταβολισμός ασβεστίου, φωσφόρου
Οξειδωτικό stress στα νεογνά
Klotho protein in preterm neonates
Βιταμίνη D και προτεΐνη klotho
Vitamin D and klotho protein
Klotho
Επίπεδα πρωτεΐνης klotho σε πρόωρα νεογνά
Σωματική αύξηση βρέφους
Ca and P metabolism
Humoral actions of klotho
Oxidative stress in neonates
Βασική Ιατρική
Infant growth
Ορμονικές ιδιότητες της klotho
FGF23
Ιατρική και Επιστήμες Υγείας


Greek

2012


National and Kapodistrian University of Athens
Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ)




*Institutions are responsible for keeping their URLs functional (digital file, item page in repository site)