机构地区:[1]青海大学附属医院呼吸科,青海省西宁市810001 [2]青海大学研究生院 [3]青海省高原医学研究中心 [4]武警青海总队医院军诊科
出 处:《中华医学杂志》2013年第38期3057-3059,共3页National Medical Journal of China
摘 要:目的探讨低氧诱导因子(HIF)-1α、HIF-2α在不同海拔藏、汉族的水平及意义。方法研究对象为2010年6至8月3个海拔高度的健康体检者,分为平原汉族组(P组,海拔5m),中度海拔藏、汉族组(M1和M2组;海拔2260m)及高海拔藏、汉族组(H1组和H2组,海拔4380m),每组20名。应用ELISA方法测定血清HIF-1α、HIF-2α的水平,分析其与动脉血氧分压(PaO2)、血红蛋白(Hb)的相关性。结果H2组HIF-1α水平[(6.06±1.85)μg/L]高于P组[(4.56±0.85)μg/L]、M1组[(4.41±1.05)μg/L]和M2组[(4.59±1.03)μg/L](均P〈0.05);HI组HIF-1α水平[(5.27±0.98)μg/L]高于M1组(P〈0.05)。H2组HIF-2α水平[(0.83±0.48)μg/L]高于P组[(0.33±0.11)μg/L]、M1组[(0.14±0.06)μg/L]和M2组[(0.24±0.11)μg/L](均P〈0.01);M1组HIF-2α水平低于P组和H2组(均P〈0.01);H1组HIF-2α水平[(0.18±0.16)μg/L]低于P组和H2组(均P〈0.05)。汉族组HIF-1α、HIF-2α水平与PaO2呈负相关(r=-0.475、-0.551),与Hb呈正相关(r=0.433、0.463)(均P〈0.01);藏族组HIF-1α、HIF-2α与PaO2无线性相关(r=-0.270、-0.198),HIF-1α与Hb无线性相关(r=-0.141)(均P〉0.05),HIF-2α与Hb正相关(r=0.325,P〈0.05)。结论藏、汉族在不同低氧环境下,HIF-1α、HIF-2α变化不同,HIF-2α在Hb的调节方面可能起着较HIF-1α更为重要的作用。Objective To explore the serum levels and significance of hypoxic inducible factor (HIF)-1α and HIF-2α in Tibetan and Han residents living at different altitudes. Methods A total of 100 healthy adults of Han in plain (altitude 5 m, group P) and Tibetan and Han at moderate altitude (2260 m, groups M1 & M2) and high altitude (4380 m, groups H1 & H2) (n =20 each) were selected from June 2010 to August 2010. Venous blood samples were collected in the morning. The serum concentrations of HIF-1α and HIF-2α were measured with enzyme-linked immunosorbent assay (ELISA) to analyze the correlations of HIF-1α and HIF-2α with arterial partial pressure of oxygen( PaO2 )and hemoglobin (Hb). Results The level of HIF-1α in group H2 (( 6. 06 _± 1.85 ) μg/L )was higher than that in groups P((4.56 ±0.85) μg/L, P〈0.05), M1((4.41 ±1.05)μg/L, P〈0.01)and M2((4.59±1.03)μg/L, P 〈 0. 05 ). The level of HIF-1α in group H1 ( (5.27 ± 0. 98 )μg/L)was higher than that in group M1 (P 〈 0. 05 ). The level of HIF-2α in group H2( (0. 83 ±0.48)μg/L) was higher than that in groups P ( (0. 33 ± 0.11) μg/L, P〈0.01), M1 ((0.14 ±0.06 )μg/L, P〈0.01) and M2((0.24±0.11) μg/L, P〈 0. 01 ). The level of HIF-2α in group M1 was lower than that in groups P( P 〈 0. 01 ) and M2 ( P 〈 0. 01 ). The level of HIF-2α in group H1 ( (0. 18 ± 0. 16 ) μg/L) was lower than that in groups P (P 〈 0. 05 ) and H2 (P 〈 0. 01 ). The levels of HIF-1α and HIF-2α were negatively correlated with PaO2 (r = -0.475, -0. 551, both P 〈 0. 01 ) and positively with Hb in Han groups ( r = 0. 433, 0. 463, all P 〈 0. 01 ). The levels of HIF-1α and HIF-2α had no correlation with PaO2 in Tibetan groups (r = -0. 270, -0. 198, both P〉0. 05). No correlation existed between HIF-1α and Hb in Tibetan. A positive correlation existed between HIF-2α and Hb in Tibetan ( r = 0. 325, P 〈 0. 01 �
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