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Developing targeted drugs can be complex and challenging, as seen in the history of CTP inhibitors. Past experiences, like with torcetrapib, showed unexpected safety issues due to off-target effects. Understanding side effects thoroughly in early phases of drug development is crucial to prevent catastrophic failures in later stages. Torcetrapib, initially promising due to HDL cholesterol elevation, resulted in increased blood pressure and adverse outcomes in the outcome trial, highlighting the importance of comprehensive safety assessment in clinical trials.
Mendelian randomization studies have been instrumental in debunking the HDL hypothesis. Findings from these studies, combined with clinical trial outcomes, show no causal link between HDL cholesterol and ASCVD. The failure of anacetrapib despite its HDL elevation further solidified the understanding that the benefits of CTP inhibition on reducing heart attacks are primarily through significant LDL lowering rather than HDL effects.
Deeper insights into the evolutionary role of genes like CTP reveal an intriguing perspective on cholesterol conservation. The thrifty gene hypothesis proposes that the selective advantage of conserving cholesterol, driven by ancient dietary scarcity, may now predispose individuals to health risks in modern environments. Understanding this evolutionary context sheds light on the complexities of managing lipid levels and health outcomes in contemporary populations.
The podcast delves into the evolutionary significance of cholesterol metabolism, highlighting the resource constraints of the environment throughout history. It emphasizes the importance of LDL clearance and the role of shuttling cholesterol within the body. The discussion connects the efficiency of LDL clearance to the historical need for preserving resources, shedding light on the potential implications in modern contexts.
The podcast introduces Obicetrapib as a potent CETP inhibitor with remarkable LDL-lowering and HDL-increasing properties. The speaker recounts the drug's discovery process, emphasizing its significant impact on lipid metabolism. The discussion expands beyond cardiovascular benefits, exploring potential applications in Alzheimer's, macular degeneration, sepsis, and diabetes, attributing these effects to altered lipoprotein metabolism facilitated by the drug.
The podcast narrows down to the intricate link between CTEP inhibition, ApoE genetics, and neurodegenerative conditions like Alzheimer's disease. It discusses the role of ApoE4 in brain cholesterol metabolism and its impact on Alzheimer's risk. The conversation extends to cardiovascular implications, highlighting how ApoE genetics influence atherosclerosis progression and cardiovascular disease risk, providing a nuanced understanding of lipid dynamics in these contexts.
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John Kastelein is a renowned expert in lipoprotein metabolism and atherosclerotic cardiovascular disease (ASCVD) research. In this discussion, John delves deep into familial hypercholesterolemia (FH), a genetic disorder characterized by high levels of LDL cholesterol in the blood that increases the risk of developing heart disease. He covers its definition, genetic underpinnings, and clinical identification. He then explores the therapeutic options available for the prevention and treatment of cardiovascular disease, including the captivating history of CETP inhibitors. He explains the past shortcomings of previous CETP inhibitors before underscoring the compelling potential of the latest iterations, not only for cardiovascular disease but also for conditions like Alzheimer's disease and type 2 diabetes. Moreover, he unveils the intricate role of APOE, shedding light on why the APOE4 isoform codes for a protein that significantly increases the risk of Alzheimer's disease and cardiovascular disease. Concluding the discussion, John shares a profound sense of optimism, envisioning the possibility of targeted therapeutic interventions for high-risk patients in the near future.
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