A RAT MODEL FOR INVESTIGATION OF SPINAL MECHANISMS IN DETRUSOR INSTABILITY ASSOCIATED WITH INFRAVESICAL OUTFLOW OBSTRUCTION

被引:35
作者
IGAWA, Y [1 ]
ANDERSSON, KE [1 ]
POST, C [1 ]
UVELIUS, B [1 ]
MATTIASSON, A [1 ]
机构
[1] UNIV LUND HOSP, DEPT CLIN PHARMACOL, S-22185 LUND, SWEDEN
来源
UROLOGICAL RESEARCH | 1993年 / 21卷 / 04期
关键词
DETRUSOR INSTABILITY; INFRAVESICAL OUTFLOW OBSTRUCTION; RAT URINARY BLADDER; SPINAL MECHANISM(S);
D O I
10.1007/BF00307703
中图分类号
R5 [内科学]; R69 [泌尿科学(泌尿生殖系疾病)];
学科分类号
1002 ; 100201 ;
摘要
A rat model of infravesical outflow obstruction was modified to allow cystometric investigation in conscious, free-moving animals after intrathecal drug administration. The catheter position and extent of drug distribution were controlled by injection of dye and dissection of the spinal canal. Continuous cystometries were performed in awake normal rats as well as rats with bladder hypertrophy and hyperactivity following infravesical outflow obstruction. In some animals of each group, cystometry was performed with simultaneous recording of intra-abdominal pressure. The possible effects of the presence of the intrathecal catheter were studied, as well as the effects of saline, local anesthetics, morphine and naloxone administered through the catheter. Neither the presence of the intrathecal catheter nor injection of saline affected the cystometric pattern. Bupivacaine (50 mug) produced paralysis of both lower extremities and a complete, though reversible, suppression of micturition in normal rats. In rats with hypertrophy, intrathecal bupivacaine in doses of 50 mug and 100 mug produced decreases in micturition pressure, increases in bladder capacity and dribbling incontinence. However, the amplitude of spontaneous contractile activity increased after the administration. The inhibitory.effects of morphine (0.5-10 mug) on micturition in normal rats, which were rapidly reversed by naloxone, were in accordance with results obtained in previous studies in anesthetized animals. Rats with bladder hypertrophy showed a similar response to morphine and naloxone. However, the bladder hyperactivity-was not inhibited by morphine. We conclude that the present model seems reliable for the study of spinal mechanisms in the development of detrusor instability associated with infravesical outflow obstruction.
引用
收藏
页码:239 / 244
页数:6
相关论文
共 25 条
[1]   CONTENTS AND EFFECTS OF SUBSTANCE-P AND VASOACTIVE INTESTINAL POLYPEPTIDE IN THE BLADDER OF RATS WITH AND WITHOUT INFRAVESICAL OUTFLOW OBSTRUCTION [J].
ANDERSSON, PO ;
ANDERSSON, KE ;
FAHRENKRUG, J ;
MATTIASSON, A ;
SJOGREN, C ;
UVELIUS, B .
JOURNAL OF UROLOGY, 1988, 140 (01) :168-172
[2]   REGULATION OF URINARY-BLADDER CAPACITY BY ENDOGENOUS OPIOID-PEPTIDES [J].
BOOTH, AM ;
HISAMITSU, T ;
KAWATANI, M ;
DEGROAT, WC .
JOURNAL OF UROLOGY, 1985, 133 (02) :339-342
[3]  
DRAY A, 1984, J PHARMACOL EXP THER, V231, P254
[4]   SUPRASPINAL AND SPINAL MECHANISMS IN MORPHINE-INDUCED INHIBITION OF REFLEX URINARY-BLADDER CONTRACTIONS IN THE RAT [J].
DRAY, A ;
NUNAN, L .
NEUROSCIENCE, 1987, 22 (01) :281-287
[5]   THE ACTION OF INTRATHECAL MORPHINE AND METHADONE ON THE LOWER URINARY-TRACT IN THE DOG [J].
DRENGER, B ;
MAGORA, F ;
EVRON, S ;
CAINE, M .
JOURNAL OF UROLOGY, 1986, 135 (04) :852-855
[6]   TETRODOTOXIN-RESISTANT CONTRACTIONS INDUCED BY ELECTRICAL-STIMULATION OF BLADDER MUSCLE FROM MAN, RABBIT AND RAT [J].
FOVAEUS, M ;
ANDERSSON, KE ;
ANDERSSON, PO ;
MALMGREN, A ;
SJOGREN, C .
ACTA PHYSIOLOGICA SCANDINAVICA, 1988, 132 (02) :233-239
[7]  
GREENE EC, 1955, ANATOMY RAT, P130
[8]   THE INHIBITORY EFFECT OF OPIOID-PEPTIDES AND MORPHINE APPLIED INTRATHECALLY AND INTRACEREBROVENTRICULARLY ON THE MICTURITION REFLEX IN THE CAT [J].
HISAMITSU, T ;
DEGROAT, WC .
BRAIN RESEARCH, 1984, 298 (01) :51-65
[9]   EFFECTS OF CENTRAL NERVOUS SYSTEM-ACTING DRUGS ON URINARY-BLADDER CONTRACTION IN UNANESTHETIZED RATS [J].
KONTANI, H ;
NAKAGAWA, M ;
SAKAI, T .
JAPANESE JOURNAL OF PHARMACOLOGY, 1989, 50 (03) :327-332
[10]   EFFECTS OF NIFEDIPINE AND BAY-K8644 ON NORMAL AND HYPERTROPHIED RAT DETRUSOR [J].
MALMGREN, A ;
ANDERSSON, KE ;
ANDERSSON, PO ;
FOVAEUS, M ;
SJOGREN, C .
NEUROUROLOGY AND URODYNAMICS, 1988, 7 (01) :27-35