Leptin and resistin levels and their relationships with glucose metabolism in children with chronic renal insufficiency and undergoing dialysis.
OBJECTIVE
The aim of the present study is: (i) to evaluate the serum concentrations of leptin and resistin in the paediatric patients with chronic renal impairment (CRI), on haemodialysis (HD) and on peritoneal dialysis (PD) treatment; (ii) to examine the relationship between these hormones; and (iii) to investigate the possible influence of these hormones on the insulin resistance and sensitivity indexes as well as on serum insulin-like growth factor-1 (IGF-1) and insulin-like growth factor binding protein-3 (IGFBP-3) levels.


METHODS
In total, 52 patients (15 patients with CRI, 24 PD patients and 13 HD patients) and 23 healthy age- and sex-matched control subjects were included in the present study.


RESULTS
Homeostasis model assessment of insulin resistance (HOMA-IR) was higher than 2.5 in 47.1% of the patients. IGF-1 levels of patients with CRI, PD and HD patients were significantly lower than those in the controls (P < 0.001, P < 0.001, P < 0.001, respectively). The leptin levels of patients with CRI and on PD and HD treatment were significantly higher than the control group (P = 0.038, P = 0.002, P = 0.006, respectively). Similarly, serum resistin levels of patients with CRI and those of PD and HD patients were higher when compared with healthy controls (P = 0.037, P < 0.001, P = 0.005, respectively).


CONCLUSIONS
Leptin and resistin levels were increased in the children with CRF; however, this elevation was not found to be associated with hyperinsulinism. Further studies to explain the mechanisms and consequences of the accumulation of these hormones in CRF may provide the therapeutical approach aiming to normalize their circulating levels.
Buyan
Necla
N
Department of Pediatric Nephrology, Gazi University, Ankara, Turkey. nbuyan@gazi.edu.tr
Necla
Buyan
B
Bideci
Aysun
A
Aysun
Bideci
B
Ozkaya
Ozan
O
Ozan
Ozkaya
O
Ortac
Erol
E
Erol
Ortac
O
Bakkaloglu
Sevcan
S
Sevcan
Bakkaloglu
B
Gonen
Sevim
S
Sevim
Gonen
G
Peru
Harun
H
Harun
Peru
P
Soylemezoglu
Oğuz
O
Oğuz
Soylemezoglu
S
Cinaz
Peyami
P
Peyami
Cinaz
C
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D005260:Female; D005947:Glucose / Q000378:metabolism*; D006801:Humans; D020738:Leptin / Q000097:blood*; D008297:Male; D006435:Renal Dialysis; D051436:Renal Insufficiency, Chronic / Q000097:blood* / Q000628:therapy*; D052243:Resistin / Q000097:blood*
D020738:Leptin; D052243:Resistin; D005947:Glucose