Insulin action in patients with insulinoma influenced by pharmacological and surgical therapy.

J Skrha, J Hilgertová, V Justová
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引用次数: 11

Abstract

Organic hyperinsulinism due to insulinoma is accompanied by changes of insulin action on receptor and postreceptor levels. The influence of conservative and surgical treatment on insulin sensitivity was examined by euglycaemic hyperinsulinaemic clamps in ten patients with insulinoma. The "responders" (n = 5) and "non-responders" (n = 5) to diazoxide treatment were distinguished by using fasting plasma glucose and insulin concentrations. The index of insulin sensitivity was significantly decreased in pretreated "responders" as compared to healthy persons (19 +/- 3 vs 39 +/- 6 and 20 +/- 3 vs 37 +/- 5 mumol.kg-1.min-1 per mU.l-1 x 100, p < 0.01) and it was improved during diazoxide administration (27 +/- 4 vs 19 +/- 3 and 35 +/- 12 vs 20 +/- 3 mumol.kg-1.min-1 per mU.l-1 x 100, p < 0.05). Significantly decreased insulin sensitivity in pretreated "non-responders" (25 +/- 5 vs 39 +/- 6 and 28 +/- 6 vs 37 +/- 5 mumol.kg-1.min-1 per mU.l-1 x 100, p < 0.05) was not improved by diazoxide administration. Metabolic clearance rate of glucose was significantly higher in "non-responders" as compared to "responders" and healthy persons (12.7 +/- 3.4 vs 7.9 +/- 2.7 and 7.4 +/- 2.4 ml.min-1.kg-1, p < 0.05) already in pretreated state. An inverse relationship was found between metabolic clearance rate of glucose and of insulin (r = 0.72, p < 0.001). Plasma glucose, insulin concentration, index of insulin sensitivity, and metabolic clearance rate of glucose and of insulin were normalized after surgical removal of an insulinoma in all patients.(ABSTRACT TRUNCATED AT 250 WORDS)

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胰岛素瘤患者胰岛素作用受药物和手术治疗的影响。
胰岛素瘤引起的器质性高胰岛素血症伴随着胰岛素对受体和受体后水平的作用变化。采用高胰岛素钳对10例胰岛素瘤患者进行保守治疗和手术治疗对胰岛素敏感性的影响。通过空腹血糖和胰岛素浓度来区分对二氮唑治疗有反应者(n = 5)和无反应者(n = 5)。与健康人相比,预处理“应答者”的胰岛素敏感性指数显著降低(19 +/- 3 vs 39 +/- 6, 20 +/- 3 vs 37 +/- 5)。min-1 / mU。L-1 × 100, p < 0.01),并且在给药期间(27 +/- 4 vs 19 +/- 3, 35 +/- 12 vs 20 +/- 3)有明显改善。min-1 / mU。L-1 × 100, p < 0.05)。经预处理的“无反应”患者胰岛素敏感性显著降低(25 +/- 5 vs 39 +/- 6, 28 +/- 6 vs 37 +/- 5)。min-1 / mU。L-1 × 100, p < 0.05)。与“应答者”和健康人相比,“无应答者”的葡萄糖代谢清除率明显更高(12.7 +/- 3.4 vs 7.9 +/- 2.7和7.4 +/- 2.4 ml.min-1)。Kg-1, p < 0.05)已处于预处理状态。葡萄糖代谢清除率与胰岛素代谢清除率呈负相关(r = 0.72, p < 0.001)。所有患者手术切除胰岛素瘤后,血糖、胰岛素浓度、胰岛素敏感性指数、葡萄糖和胰岛素代谢清除率均恢复正常。(摘要删节250字)
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