GH and IGF-I are the main factors to understand the biological action of GH-IGF axis.

生长激素(GH)、胰岛素样生长因子i (IGF - I)都是了解GH - IG F轴变化的主要指标。

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In those gene doping, EPO and VEGF are used to enhance the endurance performance; IGF-I, myostatin, GH and MGF are used to improve muscle strength.

其中用于提高耐力的主要有促红细胞生成素、血管内皮生长因子等，用于提高肌肉力量的有胰岛素样生长因子-I、肌肉生长抑制素、生长激素、机械生长因子等。

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Results: The percent tumor shrinkage after 12 months was significantly correlated with GH, IGF-I, and tumor volume at 3 months and with the dose of LAR administered between 3 and 12 months.

结果：治疗12个月后肿瘤的缩小比例与治疗3个月后生长激素的水平，胰岛素样生长因子的水平及当时肿瘤的体积显著相关。

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