Abstract:
:Nude mice bearing xenografts of HT-29 human colon cancer cell line were treated for 4 weeks with a [D-Trp6] agonist of luteinizing hormone releasing hormone (LH-RH), somatostatin analogue (RC-160), and bombesin/gastrin releasing peptide antagonist (RC-3095). Some inhibitory effect of [D-Trp6] LH-RH microcapsules releasing 25 micrograms/day on tumor growth was observed that could be due to sex steroid deprivation, but the inhibition was not statistically significant. Microcapsules of RC-160, releasing 50 micrograms/day, significantly reduced tumor volume after 21 and 24 days of treatment, but at the end of the experiment the inhibition in tumor volume and weight was not significant. Bombesin/gastrin releasing peptide antagonist RC-3095, at a dose of 20 micrograms/day administered by daily s.c. injections or by continuous infusion using Alzet osmotic minipumps, had the greatest inhibitory effect on tumor growth. Tumor volume, percentage change in tumor volume, and tumor weights were significantly decreased in both groups treated with RC-3095. This is the first report on inhibition of human colon cancer growth in vivo by bombesin antagonists.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Radulovic S,Miller G,Schally AVsubject
Has Abstractpub_date
1991-11-01 00:00:00pages
6006-9issue
21eissn
0008-5472issn
1538-7445journal_volume
51pub_type
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