CDK4/6 inhibitors have emerged as an important treatment option for advanced hormone receptor-positive breast cancer. They work by blocking the activity of proteins called CDK4 and CDK6, which are involved in cell division. By doing this, these inhibitors can prevent cancer cells from growing and dividing.
Several CDK4/6 inhibitors are currently approved for use, including Ribociclib , Palbociclib and Abemaciclib. They are commonly used in combination with hormone therapy as first-line treatment for advanced hormone receptor-positive breast cancer, and have been shown to significantly prolong progression-free survival in this patient population.
It has been observed that certain markers may predict response to treatment, although further research is needed in this area. For example, patients with hormone receptor-positive breast cancer seem to respond better to CDK4/6 inhibitors compared to those with hormone receptor-negative cancer. There is also some evidence to suggest that alterations in certain genes such as PIK3CA could predict resistance to CDK4/6 inhibitors.
Overall, CDK4/6 inhibitors have brought a significant improvement in the management of advanced hormone receptor-positive breast cancer, offering a balance of efficacy and tolerability that can help to optimise patient outcomes.
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