Spontaneous thyroid carcinoma 33% (Lindsey et al 1968). Adrenal cortical tumours 94% and pituitary tumours 8-18% at 18 months (Hansen et al 1973). In animals over 18 months Snell found adenomas or carcinomas of adrenal cortex 73% in males and 95% in females, pituitary tumours 25%, granulosa cell tumours of the ovary 33% in females. Animals were also relatively resistant to development of nephritis (Snell 1965). Poor survival to 2-years of age at 43% (rank 5/5) in males and 38% (rank 5/5) in females with relatively severe chronic renal disease and an intermediate level of hydronephrosis which may make the strain unsuitable for long-term toxicity studies (Solleveld and Boorman 1986). Very susceptible to chronic respiratory disease (Greenhouse et al 1991).
Spontaneous thyroid carcinoma 33% (Lindsey et al 1968). Adrenal cortical tumours 94% and pituitary tumours 8-18% at 18 months (Hansen et al 1973). In animals over 18 months Snell found adenomas or carcinomas of adrenal cortex 73% in males and 95% in females, pituitary tumours 25%, granulosa cell tumours of the ovary 33% in females. Animals were also relatively resistant to development of nephritis (Snell 1965). Poor survival to 2-years of age at 43% (rank 5/5) in males and 38% (rank 5/5) in females with relatively severe chronic renal disease and an intermediate level of hydronephrosis which may make the strain unsuitable for long-term toxicity studies (Solleveld and Boorman 1986). Very susceptible to chronic respiratory disease (Greenhouse et al 1991).
High blood pressure (3/23), reaching 154_1.0 (SEM) mmHg at 10 weeks of age (Tanase et al 1982). Mammary tumours 26-30%. High incidence of retinal degeneration in animals over 10 months (von Sallman and Grimes 1972, 1974). High systolic blood pressure (2/17) (Hansen et al 1973). Becomes obese on a high fat diet (1/7) (Schemmel et al 1970, Buchanan et al, 1992). Enterostatin inhibited the uptake of high, but not low fat diets after an overnight fast (contrast strain S5B) (Okada et al, 1992). High 10-week body weight in males (20/23) (Tanase et al 1982).
High blood pressure (3/23), reaching 154_1.0 (SEM) mmHg at 10 weeks of age (Tanase et al 1982). Mammary tumours 26-30%. High incidence of retinal degeneration in animals over 10 months (von Sallman and Grimes 1972, 1974). High systolic blood pressure (2/17) (Hansen et al 1973). Becomes obese on a high fat diet (1/7) (Schemmel et al 1970, Buchanan et al, 1992). Enterostatin inhibited the uptake of high, but not low fat diets after an overnight fast (contrast strain S5B) (Okada et al, 1992). High 10-week body weight in males (20/23) (Tanase et al 1982).