Biomaterial Database

Induction of tumors in the stomach and nervous system of the ACI/N rat by continuous oral administration of 1-methyl-3-acetyl-1-nitrosourea. 1976

A Maekawa, and S Odashima, and M Nakadate

Three groups of ACI/N rats of both sexes received continuous administration of 66 (Group I), 30 Group II), or 13(Group III) ppm solution of 1-methyl-3-acetyl-1-nitrosourea (Ac-MNU) in their drinking water. Tumors were found most frequently in the stomach and nervous system. The former was more frequently found in the male than in the female. The incidence was highest in males of Group II, 28/30 (93%), and lowest in females of Group I, 4/30 (13%). Histologically, all epithelial tumors of the stomach were benign adenomas except 5 adenocarcinomas. Neurogenous tumors were more frequently seen in the female than in the male. The incidence was highest in females of Group I, 29/30 (97%), and lowest in males of Group III, 6/28 (21%). The tumors were predominant in the central nervous system, especially in the hemispheres. Transplantation studies were done in some of these tumors. Although gastric tumors failed to get positive transplantation, all the neurogenous tumors transplanted were positive.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D009368	Neoplasm Transplantation	Experimental transplantation of neoplasms in laboratory animals for research purposes.	Transplantation, Neoplasm,Neoplasm Transplantations,Transplantations, Neoplasm
D009374	Neoplasms, Experimental	Experimentally induced new abnormal growth of TISSUES in animals to provide models for studying human neoplasms.	Experimental Neoplasms,Experimental Neoplasm,Neoplasm, Experimental
D009380	Neoplasms, Nerve Tissue	Neoplasms composed of nerve tissue. This concept does not refer to neoplasms located in the nervous system or its component nerves.	Neoplasms, Nervous Tissue,Nerve Tissue Neoplasms,Nervous Tissue Neoplasms,Neoplasm, Nerve Tissue,Neoplasm, Nervous Tissue,Nerve Tissue Neoplasm,Nervous Tissue Neoplasm
D009607	Nitrosourea Compounds	A class of compounds in which the core molecule is R-NO, where R is UREA.	Compounds, Nitrosourea
D010524	Peripheral Nervous System Neoplasms	Neoplasms which arise from peripheral nerve tissue. This includes NEUROFIBROMAS; SCHWANNOMAS; GRANULAR CELL TUMORS; and malignant peripheral NERVE SHEATH NEOPLASMS. (From DeVita Jr et al., Cancer: Principles and Practice of Oncology, 5th ed, pp1750-1)	Peripheral Nerve Neoplasms,Peripheral Nerve Neoplasms, Benign,Peripheral Nerve Neoplasms, Malignant,Peripheral Nerve Neoplastic Infiltration,Peripheral Nerve Tumors,Peripheral Nervous System Benign Neoplasms,Peripheral Nervous System Malignant Neoplasms,Neoplasm, Peripheral Nerve,Neoplasms, Peripheral Nerve,Nerve Neoplasm, Peripheral,Nerve Neoplasms, Peripheral,Nerve Tumor, Peripheral,Nerve Tumors, Peripheral,Peripheral Nerve Neoplasm,Peripheral Nerve Tumor,Tumor, Peripheral Nerve,Tumors, Peripheral Nerve
D011912	Rats, Inbred ACI	An inbred strain of rat that is widely used in BIOMEDICAL RESEARCH. Applications include the study of spontaneous NEOPLASMS; CHRONIC KIDNEY DISEASES, and CONGENITAL ABNORMALITIES.	Rats, Inbred A x C 9935 Irish,Rats, ACI,ACI Rat,ACI Rat, Inbred,ACI Rats,ACI Rats, Inbred,Inbred ACI Rat,Inbred ACI Rats,Rat, ACI,Rat, Inbred ACI
D001932	Brain Neoplasms	Neoplasms of the intracranial components of the central nervous system, including the cerebral hemispheres, basal ganglia, hypothalamus, thalamus, brain stem, and cerebellum. Brain neoplasms are subdivided into primary (originating from brain tissue) and secondary (i.e., metastatic) forms. Primary neoplasms are subdivided into benign and malignant forms. In general, brain tumors may also be classified by age of onset, histologic type, or presenting location in the brain.	Brain Cancer,Brain Metastases,Brain Tumors,Cancer of Brain,Malignant Primary Brain Tumors,Neoplasms, Intracranial,Benign Neoplasms, Brain,Brain Neoplasm, Primary,Brain Neoplasms, Benign,Brain Neoplasms, Malignant,Brain Neoplasms, Malignant, Primary,Brain Neoplasms, Primary Malignant,Brain Tumor, Primary,Brain Tumor, Recurrent,Cancer of the Brain,Intracranial Neoplasms,Malignant Neoplasms, Brain,Malignant Primary Brain Neoplasms,Neoplasms, Brain,Neoplasms, Brain, Benign,Neoplasms, Brain, Malignant,Neoplasms, Brain, Primary,Primary Brain Neoplasms,Primary Malignant Brain Neoplasms,Primary Malignant Brain Tumors,Benign Brain Neoplasm,Benign Brain Neoplasms,Benign Neoplasm, Brain,Brain Benign Neoplasm,Brain Benign Neoplasms,Brain Cancers,Brain Malignant Neoplasm,Brain Malignant Neoplasms,Brain Metastase,Brain Neoplasm,Brain Neoplasm, Benign,Brain Neoplasm, Malignant,Brain Neoplasms, Primary,Brain Tumor,Brain Tumors, Recurrent,Cancer, Brain,Intracranial Neoplasm,Malignant Brain Neoplasm,Malignant Brain Neoplasms,Malignant Neoplasm, Brain,Neoplasm, Brain,Neoplasm, Intracranial,Primary Brain Neoplasm,Primary Brain Tumor,Primary Brain Tumors,Recurrent Brain Tumor,Recurrent Brain Tumors,Tumor, Brain
D005260	Female		Females
D000236	Adenoma	A benign epithelial tumor with a glandular organization.	Adenoma, Basal Cell,Adenoma, Follicular,Adenoma, Microcystic,Adenoma, Monomorphic,Adenoma, Papillary,Adenoma, Trabecular,Adenomas,Adenomas, Basal Cell,Adenomas, Follicular,Adenomas, Microcystic,Adenomas, Monomorphic,Adenomas, Papillary,Adenomas, Trabecular,Basal Cell Adenoma,Basal Cell Adenomas,Follicular Adenoma,Follicular Adenomas,Microcystic Adenoma,Microcystic Adenomas,Monomorphic Adenoma,Monomorphic Adenomas,Papillary Adenoma,Papillary Adenomas,Trabecular Adenoma,Trabecular Adenomas