text_1: 2 型 黄斑 毛细血管 扩张 症 患者 的 总 脱氧 二氢鞘 氨醇 水平 与 HSAN1 患者 相似 , 有时 高于 HSAN1 患者 , 这 提示 丝氨酸 水平 降低 足以 使 脱氧 二氢鞘 氨醇 增加 至 与 疾病相关 的 水平 .
  
text_2: patients with macular telangiectasia type 2 had total deoxysphinganine levels that were similar to , and in some cases higher than , those of patients with HSAN1 , which suggested that reduced serine levels are sufficient to increase deoxysphinganine to disease @-@ associated levels .
  