Intrinsic Deep-Blue Autofluorescence Linked to Condensate-Type Distinction in Amyloid Pathogenesis

Strategic Insights -

Researchers at the Indian Institute of Technology (IIT) Hyderabad have made a significant breakthrough in understanding the behavior of amyloid proteins, which are implicated in various neurodegenerative diseases such as Alzheimer's and Amyotrophic Lateral Sclerosis (ALS). The study, published in the New Journal of Chemistry, explores the intrinsic deep-blue autofluorescence (dbAF) generated by the aggregation of TDP-43 protein, a key player in ALS pathogenesis.

Key Takeaways:

  • The study found that the addition of Zn2+ ions and kosmotropic SO42- anions enhanced in vitro solid-like aggregation of TDP-43 and its C-terminal fragment TDP-432C, which also caused the generation of dbAF.
  • dbAF was observed in both amyloid and non-amyloid types of TDP-43 aggregates, but not in phase-separated droplets.
  • The study suggests that the proximity of amino acid reactive side chains in solid-like aggregates may be responsible for the generation of dbAF.
  • The research has the potential to enable condensate-type distinction and label-free detection of TDP-43 aggregation, which may be a useful tool in the diagnosis and monitoring of ALS.
  • The study was supported by the Science and Engineering Research Board, Ministry of Education, Singapore, Ministry of Higher Education & Scientific Research (MHESR), Department of Biotechnology (DBT) India, IIT-Hyderabad, and Science Engineering Research Board (SERB), India.

Statistics:

  • 49(38):16669-16690: The volume and page numbers of the study published in the New Journal of Chemistry.
  • 2025: The year of publication of the study.
  • 38: The issue number of the New Journal of Chemistry where the study is published.
  • 16669-16690: The page numbers where the study is published.
  • 10.1039/D5NJ03993A: The digital object identifier (DOI) of the study.
  • 1.2 billion: The estimated number of people affected by neurodegenerative diseases worldwide, including ALS and Alzheimer's.

Sources:

  • New Journal of Chemistry, 2025;49(38):16669-16690
  • Royal Society of Chemistry, Thomas Graham House, Science Park, Milton Rd, Cambridge CB4 0WF, Cambs, England
  • Indian Institute of Technology (IIT) Hyderabad, Dept. of Biotechnologies, Sangareddy 502284, Telangana, India