表面灌流β-酪啡肽对离体仔猪胃窦分泌胃泌素的影响

酪蛋白经水解能产生多种生物活性肤，其中具有阿片样活性的β－酪啡肽7（β-CM7）。本文以体外表面灌流，探讨β-CM7，对不同日龄猪胃窦粘膜分泌胃泌素的影响。结果显示，β-CM：能显著促进1、5、10、28日龄仔猪胃窦粘膜分泌胃泌素，并以1日龄的仔猪胃窦粘膜最敏感；28日龄仔猪胃窦粘膜对刺激的反应持续时间最长。提示：乳蛋白不仅被动地作为幼畜的营养物，并具有潜在的信息功能，能影响胃肠道的内分泌；不同日龄的仔猪对其反应不同，反映了营养物与动物的互作。

离体眼球表面灌流系统的建立及其功能评价

目的 建立离体眼球表面灌流系统（isolated eye superfusion system,IESS）,评价IESS对离体眼球正常形态和功能的维持能力.方法 在文献报道基础上,应用仿生学原理,结合具体实验条件,自行设计制作离体眼球表面灌流系统.选取8只经检测未发生损伤的离体兔眼置于IESS中,在不同时间点对离体眼球进行角膜混浊度、荧光素滞留度、角膜水肿率和病理组织学改变进行检测,从而评价IESS的功能.以上实验间隔1周进行1次,共进行3次.结果 成功设计制作了具有自主知识产权的IESS.3组评价试验中,离体眼球角膜混浊度评分分别为0.00±0.00、0.01±0.03和0.00±0.01 荧光素滞留度评分分别为0.03±0.09、0.00±0.00和0.03±0.09 角膜水肿率分别为（2.06±1.63）%、（2.83±1.93）%和（2.03±1.19）%,以上指标均在允许范围内,并未见明显的角膜病理组织学损伤.IESS工作稳定性良好,3组实验间各指标差异无统计学意义（P＞ 0.05）.结论 IESS可以维持离体眼球在实验期间的正常形态,且具有较高的稳定性和可靠性,可以用于试验用离体眼球的短期保存.

酪啡肽对仔猪离体胃窦粘膜分泌胃泌素的影响

以表面灌流系统探讨了 β 酪啡肽7(β CM7)对仔猪胃窦粘膜分泌胃泌素的影响。实验结果表明 ,β CM7能显著促进胃窦粘膜分泌胃泌素 (2 9 3% ,P <0 0 1 ) ,且此效应不可被纳络酮 (Nal)逆转 (P <0 0 1 )。酪蛋白的胃蛋白酶水解液也能促进胃窦粘膜分泌胃泌素 (46 6 % ,P <0 0 5 ) ,Nal亦不可逆转 (P <0 0 5 )此效应。

The influence of different methods of acupuncture on skin surface perfusion

OBJECTIVE:To compare the effects on the body surface of different kinds of placebo/sham acupuncture with that of traditional needling sensation acupuncture.METHODS:Point Neiguan(PC 6) of 29 healthy subjects,19 males and 10 females,was stimulated with needling sensation,shallow,placebo and deep acupuncture at the non-acupoint.After stimulation with different methods of acupuncture,the change in perfusion of the micrangium in the skin surface around the elbow joint,with Point Quze(PC 3) as its center,was observed with laser Doppler blood-flow imaging.RESULTS:Judging from the absolute value of perfusion of the skin surface micrangium,several methods of acupuncture can cause change in blood flow.The ratio of blood-flow perfusion in the meridian area in and around Quze declined before and after needling insertion in needling sensation acupuncture and shallow acupuncture.This observation did not occur in placebo and non-acupoint acupuncture.Needling sensation acupuncture at an acupoint can relatively reduce the perfusion ofthe micrangium in the projective area of the meridian where the acupoint is located on the body surface(P<0.05),indicating the specificity of meridians.CONCLUSIONS:Stimulation of an acupoint or a point on the body surface with any type of acupuncture can cause change in blood flow in the skin near the needling point.However,the biological mechanism underlying this phenomenon needs to be further explored.