Abstract

目的 探讨伴低血糖脑病的果糖-1,6-二磷酸酶缺乏症患儿的临床特点、基因突变特点、治疗及预后。 方法 总结北京大学第一医院儿科收治的1例伴低血糖脑病的果糖-1,6-二磷酸酶缺乏症患儿的临床表现、基因突变及其他辅助检查特点、治疗及预后。 结果 患儿,男,2岁5个月时因不明原因脑病、肝病就诊。患儿发病前发育正常。1岁3个月时进食甜瓜后呕吐、腹泻、腹痛。1岁3个月至2岁1个月期间共间断呕吐发作4次,伴腹泻、嗜睡、昏迷及肝损害,为进食水果后或上呼吸道感染后发作,每次发作时经葡萄糖、碳酸氢钠等静脉输注后病情很快缓解。发作间期无异常。患儿于2岁5个月时进食较多水果30 min后呕吐、昏迷、抽搐,伴发热。当地医院发现低血糖(0.52~2.30 mmol/L),代谢性酸中毒,酮症,肝损害,脑水肿。经治疗后一般情况好转,仍间断抽搐,四肢痉挛型瘫痪。基因分析显示患儿FBP1基因存在c.974T>A和c.755A>T 2个突变,父母各携带1个突变,均为未报道的新突变,证实为果糖-1,6-二磷酸酶缺乏症。 结论 果糖-1,6-二磷酸酶缺乏症为罕见的糖异生障碍性疾病,诊断困难,主要治疗方法为限制果糖、避免长期饥饿、感染等疾病,急性期补充葡萄糖溶液,多数预后良好。

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