Latanoprostene Bunod 0.024% in Subjects With Open-angle Glaucoma or Ocular Hypertension: Pooled Phase 3 Study Findings

Latanoprostene bunod ophthalmic solution 0.024% in the treatment of open-angle glaucoma: design, development, and place in therapy

Latanoprostene bunod (LBN) 0.024%, a modified prostaglandin analog, was approved on November 2, 2017, for the reduction of IOP in patients with open-angle glaucoma (OAG) or ocular hypertension (OHT). LBN works by combining the IOP-lowering effects of the prostaglandin analogs (through the uveoscleral pathway) with nitric oxide-induced relaxation of the trabecular meshwork and Schlemm’s canal. Nitric oxide-induced relaxation of the trabecular meshwork and Schlemm’s canal leads to increased outflow through the trabecular meshwork and thus lowering of IOP. LBN has now been shown in multiple clinical studies to be effective and safe. In this article, we summarize the clinical trials that led to LBN’s approval as well as the comparative studies that have been done to evaluate the efficacy of this drug as compared to other US Food and Drug Administration (FDA)-approved therapies for OAG and OHT. We then review the side effects of treatment that were seen in each of these studies. Finally, we will attempt to discuss the place of this drug in therapy for patients with OAG.

Glaucomatous optic neuropathy treatment options: the promise of novel therapeutics, techniques and tools to help preserve vision

Peripheral vision loss followed by “tunnel vision” and eventual irreversible blindness is the fate of patients afflicted by various forms of glaucoma including primary open-angle glaucoma (POAG) and normotensive glaucoma (NTG). These complex and heterogeneous diseases are characterized by extensive death of retinal ganglion cells (RGCs) accompanied by retraction and severance of their axonal connections to the brain and thus damage to and thinning of the optic nerve. Since patients suffering from this glaucomatous optic neuropathy (GON) first notice visual impairment when they have lost > 40% of their RGCs, early diagnosis is the key to retard the progression of glaucoma. Elevated intraocular pressure (IOP), low cerebrospinal and/or low intracranial fluid pressure, advancing age, and ethnicity are major risk factors associated with POAG. However, retinal vascular abnormalities and a high sensitivity of RGCs and optic nerve head components to neurotoxic, inflammatory, oxidative and mechanical insults also contribute to vision loss in POAG/GON. Current treatment modalities for POAG and NTG involve lowering IOP using topical ocular drugs, combination drug products, and surgical interventions. Two recently approved multi-pharmacophoric drugs (e.g., rho kinase inhibitor, Netarsudil; a drug conjugate, Latanoprostene Bunod) and novel aqueous humor drainage devices (iStent and CyPass) are also gaining acceptance for treating POAG/ NTG. Neuroprotective and regenerative agents, coupled with electroceutical, mechanical support systems, stem cell transplantation and gene therapy are emerging therapeutics on the horizon to help combat GON. The latter techniques and approaches hope to rejuvenate RGCs and repair the optic nerve structures, thereby providing a gain of function of the visual system for the glaucoma patients.