Previous reports have suggested that hypothalamic urocortin 1 (Ucn1) exerts inhibitory control on energy metabolism as direct paraventricular nucleus injections dose-dependently decrease the respiratory energy exchang...Previous reports have suggested that hypothalamic urocortin 1 (Ucn1) exerts inhibitory control on energy metabolism as direct paraventricular nucleus injections dose-dependently decrease the respiratory energy exchange ratio (RER). Other evidence indicates that Ucn1 injections into the lateral septum may alter metabolic function. Consequently, the present study was designed to further characterize the effects of lateral septal Ucn1 signaling on eating and energy metabolism of adult Sprague-Dawley rats. Ucn1 was infused at the onset of the nocturnal cycle at doses of 10 - 100 pmol. In both females and males the peptide elicited a reliable suppression of food intake and significantly lowered RER over a 4 h postinjection period. The decrease in RER is consistent with enhanced lipid oxidation. Overall these findings suggest that, similar to the paraventricular nucleus, the lateral septum is a critical site of action in mediating the effects of Ucn1 on food intake and energy substrate utilization.展开更多
目的探讨酒精性慢加亚急性肝衰竭患者(酒精肝衰竭组)的能量代谢与临床特点。方法选择28例酒精肝衰竭患者为研究组,48例乙肝慢加亚急性肝衰竭患者(乙肝肝衰竭组)为对照组,根据疾病程度分早期和中期,根据预后分恢复和死亡。应用间接能量...目的探讨酒精性慢加亚急性肝衰竭患者(酒精肝衰竭组)的能量代谢与临床特点。方法选择28例酒精肝衰竭患者为研究组,48例乙肝慢加亚急性肝衰竭患者(乙肝肝衰竭组)为对照组,根据疾病程度分早期和中期,根据预后分恢复和死亡。应用间接能量代谢测定仪及24h尿素氮测定患者静息能量消耗(resting energy expenditure,REE)、呼吸商(respiratory quotient,RQ)、碳水化合物(carbohydrate,CHO)、蛋白质(protein,PRO)和脂肪(FAT)的氧化率。结果酒精肝衰竭组RQ值显著低于乙肝肝衰竭组[(0.80±0.06)vs.(0.84±0.05),P=0.007]。同为疾病中期或死亡组,酒精肝衰竭组RQ值显著低于乙肝组[(0.78±0.05)vs.(0.83±0.05),(0.75±0.04)vs.(0.82±0.05),P均=0.001]。酒精肝衰竭组内,中期患者RQ显著低于早期[(0.78±0.05)vs.(0.83±0.05),P=0.007],死亡组RQ及CHO氧化率显著低于恢复组[(0.75±0.04)vs.(0.83±0.04),P=0.000;(25.82±13.04)%vs.(38.41±14.69)%,P=0.029],而FAT氧化率显著增高[(54.55±11.44)%vs.(40.29±14.53)%,P=0.011]。结论酒精肝衰竭患者REE与乙肝肝衰竭患者相似,均以FAT氧化供能为主、伴CHO利用障碍为代谢特点,并且随病情动态变化的趋势是一致的;酒精肝衰竭患者RQ值降低更加显著,RQ值与疾病严重程度和预后密切相关。合理的营养支持可降低营养不良的发生,改善预后。展开更多
文摘Previous reports have suggested that hypothalamic urocortin 1 (Ucn1) exerts inhibitory control on energy metabolism as direct paraventricular nucleus injections dose-dependently decrease the respiratory energy exchange ratio (RER). Other evidence indicates that Ucn1 injections into the lateral septum may alter metabolic function. Consequently, the present study was designed to further characterize the effects of lateral septal Ucn1 signaling on eating and energy metabolism of adult Sprague-Dawley rats. Ucn1 was infused at the onset of the nocturnal cycle at doses of 10 - 100 pmol. In both females and males the peptide elicited a reliable suppression of food intake and significantly lowered RER over a 4 h postinjection period. The decrease in RER is consistent with enhanced lipid oxidation. Overall these findings suggest that, similar to the paraventricular nucleus, the lateral septum is a critical site of action in mediating the effects of Ucn1 on food intake and energy substrate utilization.
文摘目的探讨酒精性慢加亚急性肝衰竭患者(酒精肝衰竭组)的能量代谢与临床特点。方法选择28例酒精肝衰竭患者为研究组,48例乙肝慢加亚急性肝衰竭患者(乙肝肝衰竭组)为对照组,根据疾病程度分早期和中期,根据预后分恢复和死亡。应用间接能量代谢测定仪及24h尿素氮测定患者静息能量消耗(resting energy expenditure,REE)、呼吸商(respiratory quotient,RQ)、碳水化合物(carbohydrate,CHO)、蛋白质(protein,PRO)和脂肪(FAT)的氧化率。结果酒精肝衰竭组RQ值显著低于乙肝肝衰竭组[(0.80±0.06)vs.(0.84±0.05),P=0.007]。同为疾病中期或死亡组,酒精肝衰竭组RQ值显著低于乙肝组[(0.78±0.05)vs.(0.83±0.05),(0.75±0.04)vs.(0.82±0.05),P均=0.001]。酒精肝衰竭组内,中期患者RQ显著低于早期[(0.78±0.05)vs.(0.83±0.05),P=0.007],死亡组RQ及CHO氧化率显著低于恢复组[(0.75±0.04)vs.(0.83±0.04),P=0.000;(25.82±13.04)%vs.(38.41±14.69)%,P=0.029],而FAT氧化率显著增高[(54.55±11.44)%vs.(40.29±14.53)%,P=0.011]。结论酒精肝衰竭患者REE与乙肝肝衰竭患者相似,均以FAT氧化供能为主、伴CHO利用障碍为代谢特点,并且随病情动态变化的趋势是一致的;酒精肝衰竭患者RQ值降低更加显著,RQ值与疾病严重程度和预后密切相关。合理的营养支持可降低营养不良的发生,改善预后。
