Biogen Moves Alzheimer's Drug to Phase 3 Trials Despite Mixed Results
Introduction
Biogen has announced that its experimental Alzheimer's treatment, diranersen, will move into late-stage clinical testing after a Phase 2 study showed inconsistent results.
Main Body
The study of diranersen, a drug designed to stop the production of the tau protein, produced mixed outcomes. Although the trial did not meet its main goal—specifically showing a clear link between the dose amount and the drug's effectiveness—Biogen found that tau levels decreased in the brain and spinal fluid of patients with early-stage Alzheimer's. Furthermore, these lower levels were linked to a slower decline in mental function, with the best results seen at the lowest dose. This move follows Biogen's previous work with other Alzheimer's therapies, such as Leqembi. However, diranersen represents a change in method because it must be given via spinal injection. This strategy is being pursued while competitors, such as Eli Lilly, are also researching ways to reduce tau proteins. Meanwhile, the wider pharmaceutical industry is facing changes; for example, Takeda Pharmaceutical plans to cut about 4,500 jobs by 2026 to save an estimated $1.27 billion by 2028.
Conclusion
Biogen will start Phase 3 trials for diranersen because of the observed cognitive benefits and the reduction of tau proteins, even though the standard dose-response results were missing.
Learning
🧩 The 'Contrast' Bridge: Moving Beyond "But"
At the A2 level, you probably use "but" for everything. To reach B2, you need to signal contrast more professionally. This text is a goldmine for this transition.
🛠️ Leveling Up Your Connectors
Look at how the author manages opposing ideas. Instead of saying "The results were mixed but Biogen is continuing," they use these structures:
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"Although..." "Although the trial did not meet its main goal... Biogen found that tau levels decreased."
- B2 Secret: Put "Although" at the start of the sentence to create a sophisticated lead-in. It tells the reader: "I'm about to give you a problem, but wait for the solution."
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"However..." "However, diranersen represents a change in method..."
- B2 Secret: Use this to start a brand new sentence. It acts as a 'pivot' point, completely changing the direction of the conversation.
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"Despite..." "...move into late-stage clinical testing despite mixed results."
- B2 Secret: Unlike "but," despite must be followed by a noun or a noun phrase (Mixed results), not a full sentence with a verb.
💡 Quick Comparison Table
| A2 Style (Basic) | B2 Style (Advanced) | Why it's better |
|---|---|---|
| It was raining, but we went out. | Although it was raining, we went out. | Better flow and rhythm. |
| I like the car, but it is expensive. | I like the car. However, it is expensive. | Stronger emphasis on the contrast. |
| I failed but I studied hard. | I failed despite studying hard. | More concise and academic. |
🚀 Pro Tip for Fluency
To sound like a B2 speaker, stop treating contrast as a "stop sign" (but) and start treating it as a "bridge" (although/despite). This allows you to connect complex ideas in one long, elegant sentence rather than three short, choppy ones.