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CRISPR breakthrough promises lifelong cholesterol management

by Olga Sokolova

In a groundbreaking clinical trial, a CRISPR-based treatment known as VERVE-101 has demonstrated remarkable efficacy in reducing cholesterol levels. This trial, conducted by Verve Therapeutics, targeted individuals with a genetic predisposition to high cholesterol, a condition linked to serious heart diseases. The intervention involved a single infusion of a precision gene editor, which significantly reduced cholesterol levels by up to 55 percent. This innovative approach could potentially replace the need for lifelong medication regimens currently used to manage this chronic condition.

CRISPR breakthrough promises lifelong cholesterol management

This trial marks a significant milestone in gene editing, introducing the first human application of a novel technique known as base editing. This method offers greater precision and safety compared to traditional CRISPR tools, targeting specific DNA sequences with minimal risk of off-target effects. VERVE-101 employs this technology to disrupt a gene responsible for cholesterol regulation in the liver, potentially offering a lasting solution to high cholesterol levels.

While the trial primarily aimed to evaluate safety, the results also provided insights into the treatment’s efficacy. Notably, not all participants responded uniformly, and there were instances of severe heart issues in two individuals, with one case possibly linked to the treatment. These findings underscore the importance of rigorous safety evaluations in the development of gene editing therapies. CRISPR’s potential extends beyond cancer treatment, as evidenced by recent approvals in the UK for treating blood disorders like sickle cell and beta thalassemia.

Verve’s approach differs significantly by directly infusing gene editing tools into the bloodstream, allowing in vivo editing. This method, while ambitious, raises concerns about unintended widespread genetic alterations. The therapy targets PCSK9, a liver protein pivotal in regulating LDL or “bad cholesterol” levels. Individuals with familial hypercholesterolemia, a genetic disorder affecting PCSK9, often struggle with maintaining cholesterol levels and face heightened heart disease risks. VERVE-101 aims to provide a one-time, enduring solution by correcting the PCSK9 mutation.

The trial’s initial phase focused on safety, with varying doses administered to assess potential side effects. While lower doses were well-tolerated, higher doses indicated temporary liver stress. The occurrence of two severe heart-related incidents highlighted the need for careful patient selection and monitoring in future trials.

With the initial trial results deemed encouraging, plans are underway to expand testing to a larger patient group. Verve Therapeutics is also developing an improved version of the therapy, aiming for a broader trial by 2025. The potential application of such treatments extends beyond familial hypercholesterolemia, offering hope for a more proactive approach to managing high cholesterol and reducing heart disease risks.

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