There are a number of guidelines on the management of bone loss associated with the use of Thujone aromatase inhibitors published or in development.There is common agreement that bone protection with a bisphosphonate is required for patients with osteoporosis.Similarly emerging data from the ATAC indicate that the bone loss is relatively predictable and, thus, for women with normal BMD before starting endocrine therapy, the risk of developing osteoporosis over to years on an aromatase inhibitor is very low and lifestyle advice, reassurance, and very limited, if any, followup measurements of BMD are all that is required.Controversy persists on the management of patients with osteopenia.However, the role of prophylactic bisphosphonates is uncertain.Several studies, including this one, indicate that bisphosphonates will prevent bone loss in this patient population.Specific guidelines on how to investigate and treat cancer therapy induced bone loss have recently been developed. Finally, we are indebted to all the patients for their contribution.Guidance for the management of breast cancer treatment induced bone loss.A consensus position statement from a UK ExpertGroup.Click on Request Permissions which will take you to the Copyright Clearance Centers Downloaded from clincancerres.aacrjournals.org on April. American Association for Cancer Research. The purpose of this study was to evaluate the potential of histone deacetylase inhibitors as antiCSC therapies.We performed gene expression proling to identify biomarkers predicting drug response to abexinostat.Resistance to conventional therapeutic agents in cancer may be sustained by a fraction of cancer cells within the tumor, the cancer stem cells. In breast cancer, in particular, this population has been shown to resist to conventional chemotherapy and radiation, suggesting that it will be imperative to target all CSC subsets within the tumor to prevent relapse and metastasis. Among the different antiCSC therapeutic strategies recently developed, differentiation therapy using epidrugs remains poorly explored in solid tumors.Among the different antiCSC therapeutic strategies recently developed, differentiation therapy using epidrugs remains poorly explored in solid tumors.Moreover, we identify a biomarker that predicts tumor response to abexinostat treatment.Consequently, epidrug therapies modifying the histone code have been proposed for cancer treatment and more recently as potential antiCSC therapies.Suberoylanilide hydroxamic acid treatment induced a complete differentiation of MCF cells with the induction of milk fat globule protein. These compounds are only efcient at high concentrations.We measured histone deacetylase activity in our BCL series before and after the abexinostat treatment. Dotted line allows determination of IC for each BCL.Cellcycle progression was differentially altered by abexinostat according to drugresponse prole.A, measurement of apoptosis induction by measuring caspase activation in BCL panel. C, ow charts representing cellcycle distribution of a lowdose sensitive BCL along hours of treatment.Quantications of cells in each cellcycle phase are represented in D. We next evaluated the effect of two abexinostat structurally related compounds lacking HDAC inhibitory properties.Interestingly, both derivatives did not have any effect on cell growth or on CSC population. Therefore, we studied the protein expression of different differentiation markers by immunouorescence, including CK and CK. Also, treated cells attened and generated intercellular digitations and bridges.Figure A shows newly formed cell clusters after abexinostat treatment.