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16 August 2026

TB vaccine and Alzheimer's research

The topic relates to advancements in biotechnology and medical research, which serves as useful context for questions on health technology and emerging scientific developments in GS3.

1 min read 2 questions 2 prelims

Notes

  • Inflammaging: A state of chronic, low-grade inflammation in the aging immune system that contributes to neurodegenerative conditions like Alzheimer’s.
  • Mechanism: Alzheimer’s is associated with the accumulation of toxic amyloid-beta protein plaques in the brain.
  • BCG Vaccine: The century-old tuberculosis vaccine is being studied for its potential to stimulate 'trained immunity'.
  • Trained Immunity: A process where innate immune cells develop a long-lasting memory, allowing them to respond more effectively to unrelated threats.
  • Study Findings: A study of 23 older adults showed that BCG vaccination caused monocytes in the cerebrospinal fluid to switch on genes linked to a faster, more alert immune response.
  • Amyloid Clearance: In participants without established Alzheimer’s, amyloid levels decreased in cerebrospinal fluid and increased in blood, suggesting potential clearance from the brain.
  • Limitations: The study lacked a placebo group, had a small sample size, and did not show significant changes in cognitive scores within the one-year duration.
  • Therapeutic Potential: BCG is inexpensive with established safety data, but experts suggest it may be more viable as a preventive measure rather than a treatment for advanced Alzheimer’s.

Questions

  1. Explain the concept of 'trained immunity' and discuss its potential implications for managing neurodegenerative diseases like Alzheimer’s. 150 words
    Attempt this — 150 words in 8 min
    0 / 150 words 8:00
  2. Discuss the challenges of addressing 'inflammaging' in the context of public health in India. How can repurposing existing, cost-effective vaccines contribute to preventive healthcare strategies for the elderly population? 250 words
    Attempt this — 250 words in 11 min
    0 / 250 words 11:00

Prelims

  1. What is the primary phenomenon by which the BCG vaccine is hypothesized to influence the immune response against unrelated threats?

  2. In the context of Alzheimer's research, what does the term 'inflammaging' refer to?

Syllabus

Topics

Sources

250words.in · https://250words.in/daily/2026-08-16/tb-vaccine-and-alzheimer-s-research