A FIRST-IN-CLASS INJECTABLE FOR REVERSING CATARACTS

Our team of scientists is developing a first-in-class small molecule for reversing cataracts, to be delivered via intra-vitreal injection.  TPT-161 is an investigational drug designed to restore normal lens function by unfolding misfolded proteins and breaking down disulfide bonds, both mechanisms associated with cataracts formation and eventual blindness.

A Multi-Targeting Small Molecule NCE Approach to Treating and Reversing Dysfunctional Lens Syndrome

WHAT IS IT?

  • TPT-161 is a small molecule targeting two known mechanisms of lens opacity and hardening: protein misfolding and disulfide bond formation.
  • TPT-161 is a co-drug of an alpha-crystallin chaperone plus a reducing agent.
  • The alpha-crystallin chaperone ligands bind and stabilize alpha-crystallin’s transparent, chaperone-active form to both prevent and reverse protein aggregation of the Beta and Gamma crystallins.
  • In addition to this first mechanism, a reducing agent reduces disulfide bond formations on lens proteins to reverse aggregation.
  • Together, we aim to address a large portion of nuclear sclerotic cataracts and rejuvenate vision for tens of millions of people globally.

WHAT IS THE MECHANISM?

  • Alpha-crystallins are molecular chaperones andthe key target for modulating total cystallin protein aggregation in the lens.
  • With age, alpha-crystallins become unstable
  • Alpha-crystallins are a genetically validated target for presbyopia and cataracts.
  • An alpha-crystallin chaperone ligand binds at the dimer interface stabilizing the dimer and preventing dissociation to an unstable monomer, and with that, reversing aggregation and lens opacity.
  • Reducing Agents reduce disulfide bond formations on lens proteins and restore the reductive capacity of glutathione, the lenses’ natural reducing agent (antioxidant).
  • A reducing agent rejuvenates reduced glutathione, the natural lenses own reducing agent, that maintains lens clarity.

WHAT IS THE INDICATION?

  • Over 2 billion people suffer from presbyopia and several hundred million have cataracts, which, without surgical intervention, leads to complete blindness
  • Both presbyopia and cataracts are conditions on the spectrum of dysfunctional lens syndrome, the natural hardening of the lens from the initial loss of accommodation through to blindness.
  • TPT-161 will rejuvenate the lens of the aging eye.

WHAT IS THE CAUSE?

  • Both cataracts and presbyopia are the result of lens hardening, a natural process which commences early in life and continues until complete blindness along the aging spectrum.
  • Proteins misfold in the lens and create lens aggregation, and oxidative stress creates further opacity.
  • TPT-161 will address the two mechanisms for lens hardening and opacification and rejuvenate the lens to a more youthful state.