Bombesin antagonist prevents CO2 laser-induced promotion of oral cancer.

We previously reported that CO2 laser incisions in carcinogen-initiated fields promoted cancer development and caused release of growth factors. Here we examined the quantitative and additive properties of this tumor-promoting event and examined whether this promotion could be nullified by treatment with a bombesin antagonist, which down-regulates epidermal growth factor receptors. The model used for cancer promotion was the hamster buccal cheek pouch that had been treated with a carcinogen (9,10-dimethyl-1,2-benzanthracene) for 6 weeks, producing premalignant lesions. These lesions would evolve into a cancer eventually without further treatment. Promotion was measured both by increased fluorescence in response to systemically administered Photofrin, measured noninvasively using an in vivo fluorescence photometer, and by the timing of appearance of clinical tumors. Laser incisions (0-3) were made into the hamster cheek 1 week apart, or three incisions were done 1 day apart. Another group of animals received bombesin antagonist RC-3095 for 4 weeks during the time incisions were made, again measuring promotion. Laser incisions 1 week apart produced additive promotion, whereas three incisions 1 day apart were not statistically different from the group receiving only one incision. RC-3095 treatment completely eliminated the promoting effects of incision and totally stopped promotion for the 4-week period of treatment. After discontinuing treatment with RC-3095, lesion progression resumed at the untreated control rate. This work confirms that the promoting event of a laser incision follows a comparable time course to release of growth factors after such an incision and that it can be eliminated by treatment with bombesin antagonists.

Influence of intensive training on salivary flow, on salivary pH and on salivary lactate concentration: consequences for oral health

Abstract of the poster presented at the First international Congress of CiiEM “From Basic Sciences to Clinical Research”, 27-28 November 2015, Egas Moniz, Caparica, Portugal.

Mental health issues in grief counseling : summary of proceedings : National Conference on Mental Health Issues Related to Sudden Infant Death Syndrome, February 23-25, 1977, Friendship International Hotel, Baltimore, Md. /

Includes bibliographical references.

Priorities in health statistics : proceedings of the 19th national meeting of the Public Health Conference on Records and Statistics, August 1983.

Mode of access: Internet.

Proceedings of the 18th national meeting of the Public Health Conference on Records and Statistics : new challenges for vital and health records.

Mode of access: Internet.

A national plan of re-education for the control of dental disease through prevention /

Bibliography: p. 49-50.

[Official program of the first national convention held in Cleveland, August 14, 15 and 16, 1936]

Mode of access: Internet.

Alcohol safety program progress. Volume 1: nature and scope of the national program.

Mode of access: Internet.

Preparing a research grant application to the National Institutes of Health : selected articles.

"May 1987."

Preparing a research grant application to the National Institutes of Health : selected articles /

Shipping list no.: 95-0133-P.

Becoming a patient at the National Institutes of Health, Clinical Center.

"June 1995"--P. [4] of cover.