目的:研究枳实及其主要活性成分促进脾虚模型大鼠胃肠运动的机制.方法:将170只大鼠随机分为空白组(10只)和造模组(160只),造模组大鼠以苦寒泻下+饥饱失常法复制脾虚模型.造模后,将大鼠随机分为模型组,柚皮苷低、中、高剂量组(3.267、6.535、13.070 mg/mL),新橙皮苷低、中、高剂量组(3.865、7.730、15.460 mg/mL),辛弗林低、中、高剂量组(0.252、0.504、1.008 mg/mL),3个单体成分(即柚-新-辛)低、中、高剂量配伍组和枳实水煎液低、中、高剂量组(0.104、0.208、0.416 g/mL,以生药计),每天ig给药1次,10 mL/kg,连续7 d.末次给药后,检测大鼠血清胃泌素(GAS)和血浆乙酰胆碱(ACh)、胃动素(MTL)、P物质(SP)、血管活性肠肽(VIP)水平.结果:与空白组比较,模型组大鼠血清GAS水平和血浆ACh、MTL、SP水平降低(P〈0.01),血浆VIP水平升高(P〈0.05).与模型组比较,除柚皮苷高剂量组和辛弗林各剂量组大鼠血清GAS水平外,其余各给药组均明显升高(P〈0.05或P〈0.01);新橙皮苷高剂量组、辛弗林高剂量组和枳实水煎液低剂量组大鼠血浆ACh水平显著升高(P〈0.01);新橙皮苷中、高剂量组,辛弗林高剂量组,低、中剂量配伍组和枳实水煎液中、高剂量组大鼠血浆MTL水平显著升高(P〈0.05);柚皮苷低、中剂量组和新橙皮苷各剂量组大鼠血浆SP水平显著升高(P〈0.05或P〈0.01);柚皮苷低剂量组,辛弗林高剂量组和枳实水煎液低、中剂量组大鼠血浆VIP水平显著降低(P〈0.05).结论:枳实可能通过促进GAS、ACh、MTL的分泌和抑制VIP的分泌来促进脾虚模型大鼠的胃肠运动;其与3个单体成分对胃肠激素的调节作用有差异.
OBJECTIVE:To study the mechanism of Aurantii fructus immaturus(AFI)and its main active ingredients in pro-moting gastrointestinal motility of model rats with spleen deficiency. METHODS:170 rats were randomly divided into blank group (10 rats) and modeling group (160 rats),rats in modeling group was induced models with spleen deficiency by bitter cold diar-rhea+irregular diet. After modeling, rats were randomly divided into model group, naringin (NA) low-dose, medium-lose, high-dose groups(3.267,6.535,13.070 mg/mL),neohesperidin(NE)low-dose,medium-lose,high-dose groups(3.865,7.730, 15.460 mg/mL),synephrine(SY)low-dose,medium-lose,high-dose groups(0.252,0.504,1.008 mg/mL),compatibility groups with 3 monomer ingredients (NA-NE-SY) low-dose,medium-lose,high-dose and AFI water decoction low-dose,medium-lose, high-dose groups(0.104,0.208,0.416 g/mL,calculated by crude drug),ig,once a day,10 mL/kg,for 7 d. After the last admin-istration,gastrin (GAS) in serum,and acetylcholine (ACh),motilin (MTL),substance P (SP),vasoactive intestinal peptide (VIP)levels in plasma were detected. RESULTS:Compared with blank group,GAS level in serum and ACh,MTL,SP levels in plasma in model group were reduced(P〈0.01),VIP level in plasma was increased(P〈0.05). Compared with model group,ex-cept for the GAS level in serum showed no obvious change in NA high-dose group and SY doses groups,other medicine groups were obviously increased (P〈0.05 or P〈0.01);the ACh levels in serum were obviouly increased in NE high-dose group,SY high-dose group and AFI water decoction low-dose group(P〈0.01). MTL levels in plasma were obviously increased in NE medi-um-dose,high-dose groups,SY high-dose group,compatibility low-dose,medium-dose groups and AFI water decoction medi-um-dose,high-lose groups (P〈0.05);SP levels in plasma were obviously increased in NA low-dose,medium-dose groups and NE doses groups(P〈0.05 or P〈0.01);VIP levels were reduced in NA