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Related Experiment Video

Updated: Mar 20, 2026

Author Spotlight: Advancing Vision Restoration - Stem Cell-Based Therapy for Retinal Diseases
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Bst2-targeted senotherapy restores visual function by eliminating senescent retinal cells.

Jun Yong Oh1, Jae-Byoung Chae2, Hyo Kyung Lee3

  • 1Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan, Republic of Korea.

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|March 19, 2026
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Researchers identified a new marker, Bst2, on senescent retinal pigment epithelium (RPE) cells. They developed a targeted nanomedicine (B-Z-PON) to eliminate these cells, offering a potential therapy for retinal aging and diseases.

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Area of Science:

  • Ophthalmology
  • Gerontology
  • Nanomedicine

Background:

  • Senescent cells accumulate in the retina, contributing to aging and diseases like age-related macular degeneration.
  • Current senolytics lack specificity, risking damage to healthy retinal pigment epithelium (RPE) cells.
  • Targeted elimination of senescent RPE cells presents a therapeutic opportunity.

Purpose of the Study:

  • To identify a specific marker for senescent RPE cells.
  • To develop a targeted drug delivery system for senescent RPE cells.
  • To evaluate the therapeutic potential of this system in retinal aging models.

Main Methods:

  • Integrated transcriptomic analysis of aged and senescent mouse RPE cells.
  • Development of B-Z-PON, a nanocarrier system using anti-Bst2 antibodies.
  • In vivo administration of B-Z-PON loaded with ABT-263 in mouse models of retinal degeneration.

Main Results:

  • Bst2 was identified as a selective marker for senescent RPE cells.
  • B-Z-PON demonstrated selective accumulation in senescent RPE cells.
  • Treatment reduced senescent cells, restored RPE function, and improved vision in models.

Conclusions:

  • Bst2 is a viable target for senescent RPE cells.
  • B-Z-PON offers a precise nanomedicine platform for senotherapy.
  • This approach holds promise for treating retinal aging and related diseases.