Penichet M
Tanzania
Research Article
Potential Role of Leptin Signaling in DMBA induced Mammary Tumors by Non-Responsive C57BL/6J Mice Fed a High-Fat Diet
Author(s): Gillespie C, Quarshie A, Penichet M and Gonzalez-Perez RRGillespie C, Quarshie A, Penichet M and Gonzalez-Perez RR
Environmental carcinogens, High-Fat Diet (HFD) and elevated levels of leptin correlate to increase breast cancer incidence. To test whether these factors could affect the development of Mammary Tumors (MT) via DMBA (7,12-dimethylbenz[a]anthracene) challenge, we used C57BL/6J mice that are non-responsive to develop MT in absence of hormonal stimulation. C57BL/6J female mice without hormonal stimulation were fed HFD (55% Kcalfat) and low-fat diets (10% Kcal-fat) received DMBA (oral gavage: 1 mg/weekly) for 6 weeks. To test whether leptin signaling is involved in DMBA-MT development, a potent inhibitor, pegylated leptin peptide receptor antagonist (PEG-LPrA2; half-life 66 hours), was used for 30 weeks. As expected, irrespective of PEG-LPrA2 treatment, lean mice fed with low-fat diet did not develop MT. However, HFD induced obesity and significantly stimulated earlier onset (within 18 wee.. View More»
DOI:
10.4172/2157-2518.1000132