Osteoblasts have receptors for Have estrogen and studies have shown that in vitro treatment with a combination of increased diff Strogenen, 17 estradiol, the proliferation Oxaliplatin Eloxatin of osteoblasts and erentiation Ht, regulates the growth of mineralized Knochenkn Tchen and prevents apoptosis . Research has shown that osteoblasts from patients with osteoporosis Ver show Changed in response to mechanical stress in vitro. Estrogen challenge also induces apoptosis of osteocytes efficiency, leading to hyper-mineralization of the surrounding tissue. These studies show that can occur Change the activity t of osteoblasts, when the production of estrogen effective challenge in osteoporosis. In addition recent studies have suggested that Can estrogen regulation of osteoclast activity T be a secondary Rer eff ect regulated by osteoblasts. But until today, the R The osteoblasts may need during the estrogen challenge Ness is not YOUR BIDDING clarified Rt and requires further research. ICI 182,780 or fulvestrant is an antagonist of Be used estrogen to postmenopausal women, the scarcity of stem Strogenrezeptor-positive metastatic breast cancer Fludarabine Antimetabolites inhibitor are treated. It is not % agonist and works both down-regulation and degradation of the estrogen receptor leads to inhibition of estrogen signaling via the Strogenrezeptor reported. Fulvestrant is an analogue of estradiol, with endogenous estrogen for binding to the Strogenrezeptor with a community liaison office Affi competes 89% of the estradiol 17th Fulvestrant has been previously used in vitro to mimic estrogen in the human osteoblast efficiency challenge, however, is the r Unknown activity of fulvestrant on the exact t of osteoblasts.
In this study we examine the hypothesis that the number of osteoblasts, which are non-collagen protein production and matrix mineralization in the early estrogen challenge Ness Ver changed. In vitro cell culture experiments were conducted to determine the mineral production of altretamine osteoblasts with estrogen treatment and erg Complements the estrogen receptor antagonist fulvestrant to compare. Materials and Methods Cell Culture MC3T3 E1 murine osteoblasts were in cranial Nderbar, MEM, erg Complements with 10% f Fetal K Calf serum, 2 mM glutamine L and 100 U / ml penicillin and 100 g / ml streptomycin. The cells were grown on confl uence, then at a density of 2 × 10 4 cells per ml in 6 plates and 2 ml of medium in which the osteogenic matrix mineralization can be improved by adding 50 plated g / ml ascorbic Acid, 10 mM / l glycerophosphate, and 10 nM / l dexomethasome. All treatments after 24 h incubation at osteogenic cells were cultured in different conditions have been initiated, the cells were obtained with 100 nM of 17 commercially Ltlich estradiol, the cells were treated with an antagonist commercially ltlich estrogen ICI 182 780 concerning gt 0.1 m or 10 m to the activity t of to inhibit estrogen, the cells were incubated with either F 1 or F 2 in estrogen treatment improved osteogenic media and treated cells were cultured in osteogenic media. Cell culture media were supplemented with fra media Che reconstituted every 4 days 3. All cells were maintained at 37 in a humidi ED 5% CO 2 environment for a period of 7, 14, 21 or 28 days. Each experiment was performed in duplicate wells with 3 replications. Quantifi cation of the number of cells to determine the number of cells, cells were fi x in 10% neutral formalin for buff Ered.





