Objective To determine the effect of methimazole (MMI) on retinal vascular development in neonatal rats, and to investigate the relationship between the concentration of insulin-like growth factor-I (IGF-I) in serum and the development of normal blood vessels and between the concentration of IGF-I and the formation of abnormal blood vessels. Methods There were 75 neonatal SpragueDawley rats in experimental group whose mothers were raised with water with 0.1% MMI at the first day of parturition. Another 50 neonatal rats were in the control group whose mothers were raised with normal water. The rats in the two groups were sub-divided into 4day and 10day subgroup, respectively. The retinal flatmount of the right eyes were stained with adenosine diphosphatase (ADPase); with the paraffin section of the left eyes, the number of nucleolus breaking through retinal inner limiting membrane was counted and the retinal blood vessels were evaluated. Serum IGF-I levels were detected by radioimmunoassay, and the weight of the neonatal rats in each group were observed and recorded. Results The incidence of retinal neovascularization in 10 day MMI group was 27%, and 0% in 4-day MMI group and control group. The serum IGF-I level in 4-day and 10-day MMI group (73.07 ng/ml, 175.13 ng/ml) was obviously lower than which in the 4-day and 10-day control group (168.73 ng/ml,306.38 ng/ml) （P=0.00）. Obvious slow growth of the neonatal rats was found in MMI group compared with which in the control group. Conculsions MMI may inhibit the normal growth of retinal blood vessels and lead neovascularization, which may relate to the initial decrease of the serum IGF-I level. (Chin J Ocul Fundus Dis, 2007, 23: 198-201)
目的 探讨儿童甲状腺功能亢进症的治疗措施及临床效果。 方法 对入选的200例儿童甲状腺功能亢进症患儿给予甲巯咪唑0.5~1.0 mg/(kg•d)、盐酸普萘洛尔0.3 mg/(kg•d)治疗，2~4个月待患儿甲状腺功能基本恢复正常后，将患儿随机分为对照组(n=100)及研究组(n=100)。对照组只给予甲巯咪唑治疗，研究组则继续给予甲巯咪唑并联合左甲状腺素钠治疗。比较治疗前和治疗后6个月、1年及2年患儿甲状腺体积，FT4、FT3和TSH水平，观察治疗后2年不良反应发生情况。 结果 与对照组比较，治疗6个月后研究组甲状腺体积明显降低(Plt;0.05)，药物性甲状腺功能减退症发生率低(Plt;0.05)，不良反应少。 结论 两种治疗措施均能有效改善儿童甲状腺功能亢进症的高代谢症候群，使FT3、FT4及TSH水平恢复正常，甲状腺体积明显降低，但甲巯咪唑联合左甲状腺素钠治疗能更安全有效地控制甲状腺肿大及药物继发性甲状腺功能减退症，并能减少症状复发。