IN-VIVO FUNCTION OF SURFACTANTS CONTAINING PHOSPHATIDYLCHOLINE ANALOGS

IN-VIVO FUNCTION OF SURFACTANTS CONTAINING PHOSPHATIDYLCHOLINE ANALOGS
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DOI:
10.1164/ajrccm.150.4.7921463
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发表时间:
1994-10-01
影响因子:
24.7
通讯作者:
RIDER, ED
RIDER, ED
中科院分区:
医学1区
文献类型:
--
作者:
DIZONCO, L;IKEGAMI, M;RIDER, ED

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在某些形式的梯级损伤中表现出的磷脂酶 A(2) 活性增加可能导致表面活性剂功能障碍。因此,具有表面活性剂特性的二棕榈酰磷脂酰胆碱 (DPPC) 的磷脂酶 A(2) 抗性类似物可能是治疗某些肺损伤的表面活性剂的有用脂质成分。因此,在早产兔(妊娠 27 天)中评估了含有 DPPC 或磷脂酶抗性类似物二十六烷基磷脂酰胆碱 (DEPC) 或二十六烷基膦酰胆碱 (DEPnC) 的表面活性剂的体内功能,无论是否含有表面活性剂蛋白 B 和 C (SP-B+C)。兔子随机接受七种表面活性剂中的一种(DPPC、DEPC、DEPnC、DPPC + SP-B+C、DEPC + SP-B+C、DEPnC + SP-B+C 或脂质提取物表面活性剂 [LES])或 0.45% NaCl(对照),并通气 30 分钟。相对于对照组,纯脂质表面活性剂降低了通气压力(吸气峰值压力减去呼气末正压)(p < 0.05)。添加 SP-B+C 进一步将通气压力降低至与 LES 相似的水平(与对照、纯脂质表面活性剂相比,p < 0.01)。肺动态顺应性和通气后压力-容积曲线按以下顺序改善:LES、SP-B+C + 脂质表面活性剂 > 仅脂质表面活性剂 > 对照 (p < 0.05)。相对于对照,所有表面活性剂制剂均降低了肺中血管内(125)l-白蛋白的回收率(所有表面活性剂与对照相比,p<0.01)。这些结果表明,作为合成表面活性剂的脂质成分,DEPC 和 DEPnC 与 DPPC 一样有效。与 DPPC 一样,这些类似物与分离的 SP-B+C 相互作用,并将体内功能改善至与 LES 相当的水平。
Increased phospholipase A(2) activity demonstrated in some forms of rung injury may contribute to surfactant dysfunction. Phospholipase A(2)-resistant analogs of dipalmitoylphosphatidylcholine (DPPC) with surfactant properties might therefore be useful lipid components of treatment surfactants for certain lung injuries. The in vivo function of surfactants containing DPPC or the phospholipase-resistant analogs dihexadecylphosphatidylcholine (DEPC) or dihexadecylphosphonotidylcholine (DEPnC), with or without surfactant proteins B and C (SP-B+C), was thus evaluated in preterm rabbits (27 days' gestation). Rabbits randomly received one of seven surfactants (DPPC, DEPC, DEPnC, DPPC + SP-B+C, DEPC + SP-B+C, DEPnC + SP-B+C, or lipid extract surfactant [LES]) or 0.45% NaCl (control) and were ventilated for 30 min. Lipid-only surfactants decreased ventilatory pressures (peak inspiratory pressures minus positive end-expiratory pressure) relative to control (p < 0.05). Addition of SP-B+C further decreased ventilatory pressures to levels similar to LES (p < 0.01 versus control, lipid-only surfactants). Lung dynamic compliances and postventilation pressure-volume curves improved in the following order: LES, SP-B+C + lipid surfactants > lipid-only surfactants > control (p < 0.05). All surfactant preparations decreased intravascular (125)l- albumin recoveries in the lungs relative to control (p < 0.01 for all surfactants versus control). These results indicate that DEPC and DEPnC were as effective as DPPC as lipid components of synthetic surfactants. And like DPPC, the analogs interacted with isolated SP-B+C and improved in vivo function to levels comparable to LES.