FDA Approves Guardant Health’s Blood Test for Colon Cancer Screening

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The Food and Drug Administration (FDA) has approved Guardant Health’s blood test, Shield, for colon cancer screening. While not intended to replace colonoscopies, Shield is generating enthusiasm among doctors for its potential to improve screening rates for the second-highest cause of cancer death in the U.S. Previously available at an out-of-pocket cost of $895, Shield’s FDA approval means Medicare and private insurance are likely to cover it, making it more accessible.

Dr. Arvind Dasari from MD Anderson Cancer Center welcomed the approval but noted that the impact on improving screening and reducing mortality remains to be seen. The American Cancer Society estimates over 53,000 deaths from colorectal cancer this year. Research in March showed Shield was 83% effective in detecting colorectal cancers by identifying DNA from cancerous tumors in the bloodstream, though it was less effective at detecting early-stage polyps.

Starting at age 45, Shield would need to be administered every three years. A positive result requires a follow-up colonoscopy to confirm the presence and stage of cancer, as noted by Robert Smith of the American Cancer Society. Shield is the second blood test for colon cancer, following the less accurate and less utilized Epi proColon approved in 2016.

Colorectal cancer rates have risen among those under 55 since the mid-1990s, while rates have declined among those over 60. Dr. William Grady of Fred Hutchinson Cancer Center emphasized that colorectal cancer is preventable with screening, and colonoscopy remains the most accurate method. However, screening rates are low, with fewer than 60% of eligible individuals undergoing recommended screenings. Dr. Sapna Syngal of Dana-Farber Cancer Center highlighted that increasing screening rates through tests like Shield could significantly impact cancer detection.

The March study led by Grady found that people in their 40s and 50s, often busy with work and family, are less likely to undergo screenings. The time-consuming nature and “ick” factor of colonoscopies deter many from the procedure. Electra Paskett of Ohio State University noted that a blood test would be more appealing for many people.

John Gormly, 77, avoided colonoscopies but opted for the Shield test, which led to the detection and successful surgical removal of stage 2 colon cancer. Gormly’s experience underscores the potential life-saving impact of accessible screening options like Shield.

Medicare Drug Price Negotiations: Short-Term Stability, Long-Term Concerns for Pharma

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The conclusion of the first round of Medicare drug price negotiations marks a significant milestone, though the final negotiated prices for the selected medications remain undisclosed. These prices, set to be revealed in early September, will come into effect in 2026. While the pharmaceutical industry continues to view these negotiations as a long-term threat to innovation and profits, there appears to be a sense of short-term stability among drugmakers based on recent earnings calls from key companies like Bristol Myers Squibb, Johnson & Johnson, and others.

Executives from major pharmaceutical companies have expressed varying degrees of confidence regarding the immediate impact of these negotiations. Bristol Myers Squibb CEO Christopher Boerner mentioned that the company has received the final price for its blood thinner Eliquis, shared with Pfizer, and is “increasingly confident” in navigating the impact. AbbVie CEO Robert Michael noted that the expected sales impact on its leukemia drug Imbruvica is included in financial forecasts, with AbbVie still expecting to meet its long-term outlook. Similarly, J&J Worldwide Chairman Jennifer Taubert expressed confidence in the company’s long-term growth despite new prices for its blood thinner Xarelto and psoriasis treatment Stelara.

However, Novartis CEO Vasant Narasimhan acknowledged that while the short-term impact on its drugs, such as the heart failure drug Entresto, might be manageable, the policy’s long-term effects are concerning. Narasimhan criticized the policy for its negative implications on innovation and patient care.

Despite the immediate stabilization, the pharmaceutical industry remains strongly opposed to Medicare drug price negotiations, labeling them as bad public policy. Executives like Boerner from Bristol Myers Squibb highlighted concerns about the long-term implications on innovation due to the Inflation Reduction Act (IRA). Legal challenges from companies like Merck and Novartis are ongoing, with similar claims from other industry players and trade groups being recently rejected.

The Medicare drug price negotiation authority, established under President Joe Biden’s Inflation Reduction Act, aims to make medications more affordable for older Americans. While the immediate concerns over the new Medicare drug prices have somewhat subsided, the pharmaceutical industry remains wary of the long-term impacts. The upcoming price disclosures in September will provide clearer insights into how these negotiations will shape the market and influence future strategies for drugmakers.

Long-term Benefits of Alzheimer’s Drug Leqembi Demonstrated in New Study

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The Alzheimer’s drug Leqembi has shown promising long-term benefits in slowing disease progression, according to new data released by Eisai, a Japanese drugmaker. The study, presented at the Alzheimer’s Association International Conference, highlights the importance of continued treatment for sustained cognitive and functional benefits.

Key Findings from the Study

  1. Disease Progression Slowed Over Three Years:
    • Patients on Leqembi experienced a slower progression of Alzheimer’s disease over three years.
    • Stopping treatment led to a worsening of the disease, reinforcing the need for ongoing therapy.
  2. Reduced Adverse Side Effects:
    • Side effects such as brain bleeding and swelling decreased after six months of treatment, addressing major concerns that have hindered the drug’s approval in Europe.
  3. Efficacy and Safety Data:
    • This study provides the longest available efficacy and safety data on Leqembi, adding to the 24-month data released previously.
  4. Mechanism of Action:
    • Leqembi is a monoclonal antibody targeting amyloid plaques in the brain, a hallmark of Alzheimer’s disease. It also clears protofibrils, the building blocks of amyloid plaque.
  5. Importance of Early and Sustained Treatment:
    • Early and continuous treatment with Leqembi is crucial for maintaining cognitive function and slowing disease progression.
  6. Potential for Maintenance Dose:
    • Eisai suggests that patients may eventually switch to a maintenance dose after 18-24 months of initial treatment, possibly reducing the frequency of infusions.
  7. Regulatory Approval for New Administration Methods:
    • Eisai and Biogen are seeking approval for a once-monthly infusion of Leqembi and an injectable form that can be administered at home, potentially improving patient convenience and adherence.

Detailed Study Insights

  • Phase Three Trial (Clarity AD):
    • Examined three groups: continuous Leqembi treatment for three years, a placebo group for 18 months followed by Leqembi, and a group with no treatment.
    • The continuous treatment group showed the slowest cognitive decline.
    • Those who switched from placebo to Leqembi also benefited, but their disease progression was worse compared to those who started Leqembi earlier.
  • Sub-study on Tau Protein:
    • Patients with low levels of tau protein (indicative of early-stage Alzheimer’s) showed significant benefits.
    • 59% of these patients did not see their disease progress after three years, and over half saw an improvement.
  • Phase Two Trial (Study 201):
    • Patients who stopped Leqembi reverted to the cognitive decline rate of the placebo group during a gap period.
    • This underscores the necessity of continuous treatment even after initial plaque removal.

Implications for the Future

Leqembi’s long-term benefits highlight its potential as a critical treatment in managing Alzheimer’s disease. The study suggests that early intervention and sustained treatment are key to maximizing its benefits. The move towards more convenient administration methods could further enhance patient adherence and outcomes. As the prevalence of Alzheimer’s continues to rise, these findings offer hope for improved management of this challenging condition.