Serum sialic acid alterations in the hamster cheek pouch carcinogenesis.

Carcinogenesis in the Hamster Cheek Pouch

Pouches from three experimental and one control animal were excised for analysis at various times during the first week and thereafter each week of carcinogen application (9,10-dimethyl-l ,~-benzanthracene) until the 131h week, at which time large tumors were present in all remaining aninmls. IIistologic progression from normal through inflanmmtion, uniform hyperplasia, localized premalignant h...

Antineoplastic effect of chlorpromazine in chemical carcinogenesis in the hamster cheek pouch.

Carcinogenesis in the hamster cheek pouch. II. Changes in enzymes of glucose-6-phosphate oxidation.

The activities of the enzymes, hexokinase, glucose-6-phosphate dehydrogenase, and phosphogluconate dehydrogenase were determined in extracts prepared from hamster cheek pouches which were being painted thrice weekly with 9,10-dimethyl-l,2-benzanthracene. Histology revealed five periods: I, no change, approximately 1 week; II, inflammation, 2d and 3d week; III, hyperplasia after the 3d week; IV,...

Effects of dimethyl sulfoxide on dimethylbenzanthracene-induced carcinogenesis in the hamster cheek pouch.

The studies demonstrated that the use of dimethyl sulfoxide (DMSO) as a vehicle for dimethylbenzanthracene in the produc tion of experimental tumors in the hamster cheek pouch, sig nificantly reduced the latent period for tumor production when compared to the usual mineral oil vehicle. No systemic or local changes could be attributed to the DMSO itself, and the mor phology of induced tumors was...

Propagated vasodilation in the microcirculation of the hamster cheek pouch.

Propagated vasodilation has been observed in the peripheral vasculature and may be significant in integrating the behavior of terminal arterioles and larger vessels. We have studied the characteristics of propagated vasodilation induced by acetylcholine in the microcirculation of the cheek pouch of the golden hamster. The technique of microionophoresis was used as a means of achieving relativel...