血清生长激素结合蛋白浓度和肝脏生长激素受体表达与肾病大鼠生长障碍的关系

目的：探讨营养不良、肾病本身和糖皮质激素作为各自独立因素对大鼠血清生长激素结合蛋白（ＧＨＢＰ）及肝脏生长激素受体（ＧＨＲ）表达的影响。阐明ＧＨＢＰ／ＧＨＲ改变与肾病综合征（ＮＳ）大鼠生长障碍的关系。方法２４只周龄相同体重相近的雄性ＳＤ大鼠被随机分成正常，食物对照，阿霉素（５ｍｇ．ｋｇ）肾病的地塞米松（１．８ｍｇ．ｋｇ＾－１．ｄ＾－１）治疗的阿霉素肾病４组。血清ＧＨＢＰ、ＧＨＢＰ－１浓度及肝脏ＧＨＲ

Serum growth hormone binding protein and liver growth hormone receptor in nephrotic rats with growth failure

Objective To investigate the effects of malnutrition, nephrosis itself and glucocorticoid therapy on serum growth hormone binding protein(GHBP) and liver growth hormone receptor(GHR), and elucidate the relationship between growth failure in nephrotic rats and serum GHBP or liver GHR. Methods Twenty-four male Sprague-Dawley(SD) rats were randomly divided into control, pair-fed, doxoruhincin-induced nephrotic (nephrotic) and dexamethasone-treated nephrotic (des-treated ) rats. Serum GHB P, GHB P- 1 and liver GHR were measured by dextran-coated charcoal technique, gel filtration and radioreceptor assay respectively. Results (1) Serum GHBP and liver GHR were reduced in nephrotic and des-treated rats compared with control and pair-fed rats, but no significant difference was found between control and pair-fed rats or between nephrotic and des-treated rats. (2)Serum GHBP-1 was lower in pair-fed rats, even lower in nephrotic rats and lowest in des-treated rats than in control. (3) There was some significantly positive correlations between nose-tail length or weight and serum GHBP or liver GHR. Conclusion GH resistance, due to decreasd liver GHR, is an important cause of growth failure induced by secondary malnutrition and nephrosis itself Glucocorticoid therapy deteriorates growth failure by further decreased hepatic GHR.