Methods:The SP in plasma, duodenum and distal colon were measured by the radioimmunoassay (RIA) in normal rats (n=10) and the diabetic rats (n=10)respectively.

• 方法:用放射免疫法分别检测糖尿病大鼠(10只)和正常大鼠(10只)血浆和十二指肠、远端结肠组织中P物质的含量。