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Kalyan Roy: Could Alzheimer’s-Related Proteins Be Transmitted Through Blood Transfusion?
Kalyan Roy/ LinkedIn
Sep 9, 2026, 10:23

Kalyan Roy: Could Alzheimer’s-Related Proteins Be Transmitted Through Blood Transfusion?

Kalyan Roy, Transfusion Medicine Specialist at Square Hospitals LTD, shared a post on LinkedIn about a recent article by Gargi Banerjee et al., published in The Lancet, adding:

“Could Alzheimer’s-Related Proteins Be Transmitted Through Blood Transfusion?

A recent review published in The Lancet has raised an intriguing – and important – question for the transfusion medicine community:

  • Could amyloid-beta pathology potentially be transmitted through blood transfusion?

Amyloid-beta is a protein strongly associated with Alzheimer’s disease and cerebral amyloid angiopathy (CAA).

Researchers from University College London have reviewed emerging evidence suggesting that the possibility of medically acquired transmission deserves closer scientific investigation.

What caught attention?

A large Scandinavian epidemiological study involving more than one million patients reported that individuals who received red blood cells from donors who later developed multiple cerebral hemorrhages had an approximately threefold higher risk of brain bleeding.

But an important distinction is essential:

This association does նօտ prove that amyloid-beta was transmitted through transfusion, nor does it demonstrate that Alzheimer’s disease is transmissible through blood.

There is currently no evidence that Alzheimer’s disease can be ‘caught’ through casual contact, and routine blood transfusion remains an essential and life-saving medical therapy.

However, the findings raise an important scientific question:

Could certain pathological proteins be transferred through blood and, under particular circumstances, contribute to neurological disease years later?

The authors therefore highlight the need for:

  • Development of highly sensitive assays for amyloid-beta
  • Further investigation of transfusion-associated neurological risks
  • Robust donor and blood safety surveillance
  • Large-scale epidemiological and mechanistic studies
  • International collaboration to clarify the real-world risk

The message is not alarm – but vigilance.

Transfusion medicine has always evolved by identifying potential risks before they become major safety problems.

This emerging area deserves careful, evidence-based investigation without creating unnecessary fear among blood donors or transfusion recipients.

Science today. Safety tomorrow. Better transfusion medicine for the future.”

Title: Risk of transmission of amyloid β pathology via transfused blood products

Authors: Gargi Banerjee, Gustaf Edgren, Jingcheng Zhao, Neil M Ferguson, Heli Harvala, James Hope, Graham S Jackson, Philip J Lowry, Simon Mead, Silvia A Purro, Jonathan M Schott, Marc L Turner, David J Werring, Henrik Zetterberg, John Collinge

Kalyan Roy: Could Alzheimer’s-Related Proteins Be Transmitted Through Blood Transfusion?

Find more posts featuring Kalyan Roy on Hemostasis Today.

 

Alzheimer’s Disease Amyloid-beta David J Werring Gargi Banerjee Graham S Jackson Gustaf Edgren Health Heli Harvala Hematology Hemostasis Hemostasis News Hemostasis Today Henrik Zetterberg James Hope Jingcheng Zhao John Collinge Jonathan M. Schott Kalyan Roy Marc L Turner Medicine Neil M Ferguson Philip J Lowry Silvia A Purro Simon Mead
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