| Autor: |
Fedorczak A; Department of Endocrinology and Metabolic Diseases, Polish Mother's Memorial Hospital-Research Institute, 93-338 Lodz, Poland., Kowalik D; Department of Endocrinology and Metabolic Diseases, Polish Mother's Memorial Hospital-Research Institute, 93-338 Lodz, Poland., Kopciuch J; Center of Medical Laboratory Diagnostics and Screening, Polish Mother's Memorial Hospital-Research Institute, 93-338 Lodz, Poland., Głowacka E; Center of Medical Laboratory Diagnostics and Screening, Polish Mother's Memorial Hospital-Research Institute, 93-338 Lodz, Poland., Mikołajczyk K; Department of Pediatrics, Immunology and Nephrology, Polish Mother's Memorial Hospital-Research Institute, 93-338 Lodz, Poland.; Department of Pediatrics, Nephrology and Immunology, Medical University of Lodz, 93-338 Lodz, Poland., Tkaczyk M; Department of Pediatrics, Immunology and Nephrology, Polish Mother's Memorial Hospital-Research Institute, 93-338 Lodz, Poland.; Department of Pediatrics, Nephrology and Immunology, Medical University of Lodz, 93-338 Lodz, Poland., Lewiński A; Department of Endocrinology and Metabolic Diseases, Polish Mother's Memorial Hospital-Research Institute, 93-338 Lodz, Poland.; Department of Pediatric Endocrinology, Medical University of Lodz, 93-338 Lodz, Poland., Stawerska R; Department of Endocrinology and Metabolic Diseases, Polish Mother's Memorial Hospital-Research Institute, 93-338 Lodz, Poland.; Department of Pediatric Endocrinology, Medical University of Lodz, 93-338 Lodz, Poland. |
| Abstrakt: |
Sirtuin 1 (SIRT1) inhibits growth hormone (GH) intracellular signaling for the insulin-like growth factor 1 (IGF-1) synthesis via the janus kinase (JAK)/signal transducer and activator of transcription proteins (STATs) pathway. The aim of this study was to compare SIRT1 concentrations in children with GH deficiency (GHD) and so-called idiopathic short stature (ISS, non-GH deficient), in order to determine the possible impact of changes in serum SIRT1 concentrations on the GH-IGF-1 axis. The study group included 100 short-stature children: 38 with GHD and 62 with ISS (maxGH in two stimulation tests <10 and ≥10 ng/mL, respectively). The control group consisted of 47 healthy, normal-height children. For each child, the concentrations of SIRT1, IGF-1 and insulin-like growth factor-binding protein 3 (IGFBP-3) were determined and the IGF-1/IGFBP-3 molar ratio was calculated. The level of SIRT1 was significantly higher in both groups of short children than in the controls ( p < 0.0001), but there were no differences between GHD and ISS (mean ± SD: 0.89 ± 0.45 for ISS; 1.24 ± 0, 86 for GHD; and 0.29 ± 0.21 for controls). A significant negative correlation was found between SIRT1 and height standard deviation score (SDS), IGF-1 and IGF-1/IGFBP-3, but not between SIRT1 and maxGH. Elevated SIRT1 levels may serve as one of the mechanisms through which the secretion of IGF-1 is reduced in children with short stature; however, further research is required to confirm this issue. |
