Abstract
Obesity is a risk factor for postmenopausal breast cancer and is associated with shortened latency and/or increased mammary tumor (MT) incidence in animals. Elevated body weight is usually associated with hormone-responsive tumors. In agreement with these data we previously showed that latency of hormone-responsive MTs in MMTV-TGF-α mice with diet-induced obesity was significantly shortened. Here, we used the same protocol to determine the impact of diet-induced obesity on estrogen receptor-negative MT development in MMTV-neu (strain 202) mice. Mice were fed a low-fat diet (n = 20) or a high-fat diet (n = 54) from 10 wk of age. Body weight at 19 wk of age was used to assign high-fat mice to obesity-prone, overweight, and obesity-resistant groups. Mice were euthanized due to MT size or at 85 wk of age. Final body weights of obesity-prone mice were heaviest, and those of obesity-resistant and low-fat groups were similar. Fat pad weights were heaviest in obesity-prone mice followed by overweight and obesity-resistant groups, and lightest in low-fat mice. Serum IGF-1 levels were similar for low-fat and high-fat mice, whereas leptin was higher in high-fat mice (P < 0.0001). MT latency, incidence, metastasis, and burden were similar for all groups. These findings support that obesity is not a risk factor for development of estrogen-negative breast cancer.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 174-180 |
| Number of pages | 7 |
| Journal | Nutrition and Cancer |
| Volume | 50 |
| Issue number | 2 |
| DOIs | |
| State | Published - Dec 1 2004 |
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ASJC Scopus subject areas
- Medicine (miscellaneous)
- Oncology
- Nutrition and Dietetics
- Cancer Research
Cite this
Diet-induced obesity and mammary tumor development in MMTV-neu female mice. / Cleary, Margot P.; Grande, Joseph P.; Juneja, Subhash C.; Maihle, Nita J.
In: Nutrition and Cancer, Vol. 50, No. 2, 01.12.2004, p. 174-180.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Diet-induced obesity and mammary tumor development in MMTV-neu female mice
AU - Cleary, Margot P.
AU - Grande, Joseph P.
AU - Juneja, Subhash C.
AU - Maihle, Nita J.
PY - 2004/12/1
Y1 - 2004/12/1
N2 - Obesity is a risk factor for postmenopausal breast cancer and is associated with shortened latency and/or increased mammary tumor (MT) incidence in animals. Elevated body weight is usually associated with hormone-responsive tumors. In agreement with these data we previously showed that latency of hormone-responsive MTs in MMTV-TGF-α mice with diet-induced obesity was significantly shortened. Here, we used the same protocol to determine the impact of diet-induced obesity on estrogen receptor-negative MT development in MMTV-neu (strain 202) mice. Mice were fed a low-fat diet (n = 20) or a high-fat diet (n = 54) from 10 wk of age. Body weight at 19 wk of age was used to assign high-fat mice to obesity-prone, overweight, and obesity-resistant groups. Mice were euthanized due to MT size or at 85 wk of age. Final body weights of obesity-prone mice were heaviest, and those of obesity-resistant and low-fat groups were similar. Fat pad weights were heaviest in obesity-prone mice followed by overweight and obesity-resistant groups, and lightest in low-fat mice. Serum IGF-1 levels were similar for low-fat and high-fat mice, whereas leptin was higher in high-fat mice (P < 0.0001). MT latency, incidence, metastasis, and burden were similar for all groups. These findings support that obesity is not a risk factor for development of estrogen-negative breast cancer.
AB - Obesity is a risk factor for postmenopausal breast cancer and is associated with shortened latency and/or increased mammary tumor (MT) incidence in animals. Elevated body weight is usually associated with hormone-responsive tumors. In agreement with these data we previously showed that latency of hormone-responsive MTs in MMTV-TGF-α mice with diet-induced obesity was significantly shortened. Here, we used the same protocol to determine the impact of diet-induced obesity on estrogen receptor-negative MT development in MMTV-neu (strain 202) mice. Mice were fed a low-fat diet (n = 20) or a high-fat diet (n = 54) from 10 wk of age. Body weight at 19 wk of age was used to assign high-fat mice to obesity-prone, overweight, and obesity-resistant groups. Mice were euthanized due to MT size or at 85 wk of age. Final body weights of obesity-prone mice were heaviest, and those of obesity-resistant and low-fat groups were similar. Fat pad weights were heaviest in obesity-prone mice followed by overweight and obesity-resistant groups, and lightest in low-fat mice. Serum IGF-1 levels were similar for low-fat and high-fat mice, whereas leptin was higher in high-fat mice (P < 0.0001). MT latency, incidence, metastasis, and burden were similar for all groups. These findings support that obesity is not a risk factor for development of estrogen-negative breast cancer.
UR - http://www.scopus.com/inward/record.url?scp=12744274885&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=12744274885&partnerID=8YFLogxK
U2 - 10.1207/s15327914nc5002_7
DO - 10.1207/s15327914nc5002_7
M3 - Article
C2 - 15623464
AN - SCOPUS:12744274885
VL - 50
SP - 174
EP - 180
JO - Nutrition and Cancer
JF - Nutrition and Cancer
SN - 0163-5581
IS - 2
ER -