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高原鼢鼠肉碱棕榈酰基转移酶基因的进化和表达
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Journal Article
高原鼢鼠肉碱棕榈酰基转移酶基因的进化和表达
2025
Overview
为深入了解高原鼢鼠（Eosplax baileyi）高原适应性的生物学基础，应用生物信息学相关软件分析高原鼢鼠肉碱棕榈酰基转移酶1A（carnitine palmitoyl transferase 1A，CPT-1A）基因序列的同源性和趋同进化位点，利用qRT-PCR方法测定不同海拔条件下（3 700 m和2 700 m）高原鼢鼠肝脏、骨骼肌和脂肪组织中CPT-1A基因的表达水平。结果表明：高原鼢鼠CPT-1A基因与盲鼹鼠（Nannospalax galili）的同源性最高；高原鼢鼠、盲鼹鼠和裸鼹鼠（Heterocephalus glaber）3种地下鼠CPT-1A存在明显的趋同进化位点；随着海拔的升高，高原鼢鼠背部脂肪组织中CPT-1A基因表达水平显著升高；不同组织之间的比较发现，肝脏组织中CPT-1A基因表达量最高。以上结果提示，高原鼢鼠CPT-1A基因在进化过程中形成了特定的适应性突变，低氧上调高原鼢鼠脂肪组织中CPT-1A基因的表达，这可能与高原鼢鼠适应地下寒冷、低氧和高二氧化碳浓度的洞道生境有关，是高原鼢鼠适应地下洞道生境的分子机制之一。
Publisher
Editorial Department of Chinese Journal of Wildlife
Subject
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