2Tomita R, Fujisakis S, Ikeda T, et al. Role of nitric oxide in the colon of patients with slow-transit constipation. Dis Colon Rectum, 2002, 45 : 593 - 600.
3Porter A J, Wattchow DA, Hunter A, et al. Abnormalities of nerve fibers in the circular muscle of patients with slow transit constipation, lnt J Colorectal Dis, 1998, 13 : 208--216.
5Faussone-Pellegrini MS, Infantino A, Matini P, et al, Neuronal anomalies and normal muscle morphology at the hypomotile ileoeecoeolonie region of patients affected by idiopathic chronic constipation. Histol Histopathol, 1999, 14: 1119-- 1134.
6Zadina JE, HacklerL, Ge LJtA potent and selective endogenous agonist for the uopiate receptor[J]. Nature, 1997,386:499--502.
7Yokotani K, OsumiY 1 lnvolvementofmu2 opioid in endogenousopioid-mediated inhibition of acetycholine release from the rat stomach J Jpn JPharmacol, 1998 ; 78 ( 1 ) :93-95.
8Storr M, Gaffal E, Schusdziarra V, et aI1EM1 and EM2 reduced relaxant nonadrenergic, nonchlinergic neurotransmission in rat gastric fundus J Life Sci ,2002, 71 : 383--389.
9Bujdoso E, JaszberenylM, Gardi J, et allThe involvement of dapamine and nitric oxide in the endocrine and behaviouras action of endomorphinl J Nuroscience,2003, 120( 1 ) :261--268.
10Sabri M, Barksdale E, Di Lorenzo C. Dig Dis Sci, 2003,48 : 849--853.
