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Rho-Associated Kinase Inhibitors: Evolving Strategies in Glaucoma Treatment

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Abstract

Glaucoma, a group of progressive optic neuropathies with similar patterns of tissue loss, is primarily treated with medical therapy, followed by laser therapy and, later, incisional surgery. Aside from the introduction of prostaglandin analogs, topical carbonic anhydrase inhibitors, and topical alpha-agonists in the 1990s, no new pharmaceutical agents to lower intraocular pressure (IOP) have been introduced for approximately 20 years. The Rho kinase inhibitors represent a new class of glaucoma medications that inhibit the downstream pathway of the Rho family of small G-proteins to increase outflow from the conventional (trabecular) outflow pathway in the eye. Several of these Rho kinase inhibitors, ripasudil and netarsudil, have recently reached the market and are used in clinical practice in several countries. A fixed-dose combination of latanoprost and netarsudil was also very recently approved (2019) by the US FDA. Several other novel agents are undergoing clinical trials. These drugs are poised to act as adjuncts to already established medical therapy for further lowering of IOP in the treatment of glaucoma.

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References

  1. Kingman S. Glaucoma is second leading cause of blindness globally. Bull World Health Organ. 2004;82:887–8.

    PubMed  PubMed Central  Google Scholar 

  2. Quigley HA, Broman AT. The number of people with glaucoma worldwide in 2010 and 2020. Br J Ophthalmol. 2006;90:262–7.

    Article  CAS  Google Scholar 

  3. Tham Y-C, Li X, Wong TY, Quigley HA, Aung T, Cheng C-Y. Global prevalence of glaucoma and projections of glaucoma burden through 2040: a systematic review and meta-analysis. Ophthalmology. 2014;121:2081–90.

    Article  Google Scholar 

  4. Heijl A, Leske MC, Bengtsson B, Hyman L, Bengtsson B, Hussein M, Early Manifest Glaucoma Trial Group (2002) Reduction of intraocular pressure and glaucoma progression: results from the Early Manifest Glaucoma Trial. Arch Ophthalmol (Chicago, Ill 1960) 120:1268–79.

  5. Chauhan BC, Mikelberg FS, Balaszi AG, LeBlanc RP, Lesk MR, Trope GE (2008) Canadian Glaucoma Study: 2. risk factors for the progression of open-angle glaucoma. Arch Ophthalmol (Chicago, Ill 1960) 126:1030–1036.

    Article  Google Scholar 

  6. Trese MGJ, Lewis AW, Blachley TS, Stein JD, Moroi SE. Changing initial glaucoma medical therapy increases healthcare resource utilization. J Ocul Pharmacol Ther. 2017;33:591–7.

    Article  CAS  Google Scholar 

  7. Kass MA, Heuer DK, Higginbotham EJ, Johnson CA, Keltner JL, Miller JP, Parrish RK 2nd, Wilson MR, Gordon MO (2002) The Ocular Hypertension Treatment Study: a randomized trial determines that topical ocular hypotensive medication delays or prevents the onset of primary open-angle glaucoma. Arch Ophthalmol (Chicago, Ill 1960) 120:701–730.

    Article  Google Scholar 

  8. Musch DC, Lichter PR, Guire KE, Standardi CL. The Collaborative Initial Glaucoma Treatment Study: study design, methods, and baseline characteristics of enrolled patients. Ophthalmology. 1999;106:653–62.

    Article  CAS  Google Scholar 

  9. Schwartz GF, Quigley HA. Adherence and persistence with glaucoma therapy. Surv Ophthalmol. 2008;53(Suppl 1):S57–68.

    Article  Google Scholar 

  10. Prager AJ, Liebmann JM, Cioffi GA, Blumberg DM. Self-reported function, health resource use, and total health care costs among medicare beneficiaries with glaucoma. JAMA Ophthalmol. 2016;134:357–65.

    Article  Google Scholar 

  11. Mueller BK, Mack H, Teusch N. Rho kinase, a promising drug target for neurological disorders. Nat Rev Drug Discov. 2005;4:387–98.

    Article  CAS  Google Scholar 

  12. Abu-Hassan DW, Acott TS, Kelley MJ. The trabecular meshwork: a basic review of form and function. J Ocul Biol. 2014;2(1).

  13. Rao PV, Deng PF, Kumar J, Epstein DL. Modulation of aqueous humor outflow facility by the Rho kinase-specific inhibitor Y-27632. Invest Ophthalmol Vis Sci. 2001;42:1029–37.

    CAS  PubMed  Google Scholar 

  14. Uehata M, Ishizaki T, Satoh H, et al. Calcium sensitization of smooth muscle mediated by a Rho-associated protein kinase in hypertension. Nature. 1997;389:990–4.

    Article  CAS  Google Scholar 

  15. Rao VP, Epstein DL. Rho GTPase/Rho kinase inhibition as a novel target for the treatment of glaucoma. BioDrugs. 2007;21:167–77.

    Article  CAS  Google Scholar 

  16. Honjo M, Tanihara H, Inatani M, Kido N, Sawamura T, Yue BY, Narumiya S, Honda Y. Effects of rho-associated protein kinase inhibitor Y-27632 on intraocular pressure and outflow facility. Invest Ophthalmol Vis Sci. 2001;42:137–44.

    CAS  PubMed  Google Scholar 

  17. Wang R-F, Williamson JE, Kopczynski C, Serle JB. Effect of 0.04% AR-13324, a ROCK, and norepinephrine transporter inhibitor, on aqueous humor dynamics in normotensive monkey eyes. J Glaucoma. 2015;24:51–4.

    Article  Google Scholar 

  18. Isobe T, Mizuno K, Kaneko Y, Ohta M, Koide T, Tanabe S. Effects of K-115, a rho-kinase inhibitor, on aqueous humor dynamics in rabbits. Curr Eye Res. 2014;39:813–22.

    Article  CAS  Google Scholar 

  19. Tokushige H, Inatani M, Nemoto S, Sakaki H, Katayama K, Uehata M, Tanihara H. Effects of topical administration of y-39983, a selective rho-associated protein kinase inhibitor, on ocular tissues in rabbits and monkeys. Invest Ophthalmol Vis Sci. 2007;48:3216–22.

    Article  Google Scholar 

  20. Kaneko Y, Ohta M, Inoue T, Mizuno K, Isobe T, Tanabe S, Tanihara H. Effects of K-115 (Ripasudil), a novel ROCK inhibitor, on trabecular meshwork and Schlemm’s canal endothelial cells. Sci Rep. 2016;6:19640.

    Article  CAS  Google Scholar 

  21. Tanihara H, Inoue T, Yamamoto T, Kuwayama Y, Abe H, Araie M. Phase 2 randomized clinical study of a Rho kinase inhibitor, K-115, in primary open-angle glaucoma and ocular hypertension. Am J Ophthalmol. 2013;156:731–6.

    Article  CAS  Google Scholar 

  22. Tanihara H, Inoue T, Yamamoto T, Kuwayama Y, Abe H, Fukushima A, Suganami H, Araie M. One-year clinical evaluation of 0.4% ripasudil (K-115) in patients with open-angle glaucoma and ocular hypertension. Acta Ophthalmol. 2016;94:e26–34.

    Article  CAS  Google Scholar 

  23. Tanihara H, Inoue T, Yamamoto T, Kuwayama Y, Abe H, Suganami H, Araie M. Additive intraocular pressure-lowering effects of the rho kinase inhibitor ripasudil (K-115) combined with timolol or latanoprost: a report of 2 randomized clinical trials. JAMA Ophthalmol. 2015;133:755–61.

    Article  Google Scholar 

  24. Bacharach J, Dubiner HB, Levy B, Kopczynski CC, Novack GD. Double-masked, randomized, dose-response study of AR-13324 versus latanoprost in patients with elevated intraocular pressure. Ophthalmology. 2015;122:302–7.

    Article  Google Scholar 

  25. Terao E, Nakakura S, Fujisawa Y, Fujio Y, Matsuya K, Kobayashi Y, Tabuchi H, Yoneda T, Fukushima A, Kiuchi Y. Time course of conjunctival hyperemia induced by a rho-kinase inhibitor anti-glaucoma eye drop: ripasudil 0.4. Curr Eye Res. 2017;42:738–42.

    Article  CAS  Google Scholar 

  26. Tanihara H, Inoue T, Yamamoto T, Kuwayama Y, Abe H, Araie M. Phase 1 clinical trials of a selective Rho kinase inhibitor, K-115. JAMA Ophthalmol. 2013;131:1288–95.

    Article  CAS  Google Scholar 

  27. Okumura N, Okazaki Y, Inoue R, Nakano S, Fullwood NJ, Kinoshita S, Koizumi N. Rho-associated kinase inhibitor eye drop (Ripasudil) transiently alters the morphology of corneal endothelial cells. Invest Ophthalmol Vis Sci. 2015;56:7560–7.

    Article  CAS  Google Scholar 

  28. Moloney G, Petsoglou C, Ball M, Kerdraon Y, Hollhumer R, Spiteri N, Beheregaray S, Hampson J, D’Souza M, Devasahayam RN. Descemetorhexis without grafting for fuchs endothelial dystrophy-supplementation with topical ripasudil. Cornea. 2017;36:642–8.

    Article  Google Scholar 

  29. Yamamoto K, Maruyama K, Himori N, Omodaka K, Yokoyama Y, Shiga Y, Morin R, Nakazawa T. The novel Rho kinase (ROCK) inhibitor K-115: a new candidate drug for neuroprotective treatment in glaucoma. Invest Ophthalmol Vis Sci. 2014;55:7126–36.

    Article  CAS  Google Scholar 

  30. Sturdivant JM, Royalty SM, Lin C-W, Moore LA, Yingling JD, Laethem CL, Sherman B, Heintzelman GR, Kopczynski CC, deLong MA (2016) Discovery of the ROCK inhibitor netarsudil for the treatment of open-angle glaucoma. Bioorg Med Chem Lett. https://doi.org/10.1016/j.bmcl.2016.03.104.

    Article  CAS  Google Scholar 

  31. Li G, Mukherjee D, Navarro I, et al (2016) Visualization of conventional outflow tissue responses to netarsudil in living mouse eyes. Eur J Pharmacol. https://doi.org/10.1016/j.ejphar.2016.04.002.

    Article  CAS  Google Scholar 

  32. Ren R, Li G, Le TD, Kopczynski C, Stamer WD, Gong H. Netarsudil increases outflow facility in human eyes through multiple mechanisms. Invest Ophthalmol Vis Sci. 2016;57:6197–209.

    Article  CAS  Google Scholar 

  33. Serle JB, Katz LJ, McLaurin E, Heah T, Ramirez-Davis N, Usner DW, Novack GD, Kopczynski CC. Two Phase 3 clinical trials comparing the safety and efficacy of netarsudil to timolol in patients with elevated intraocular pressure: rho kinase elevated IOP treatment trial 1 and 2 (ROCKET-1 and ROCKET-2). Am J Ophthalmol. 2018;186:116–27.

    Article  CAS  Google Scholar 

  34. Levy B, Ramirez N, Novack GD, Kopczynski C. Ocular hypotensive safety and systemic absorption of AR-13324 ophthalmic solution in normal volunteers. Am J Ophthalmol. 2015;159:980-5.e1.

    Article  Google Scholar 

  35. Aerie Pharmaceuticals Inc (2017) Aerie pharmaceuticals reports positive RoclatanTM (netarsudil/latanoprost ophthalmic solution) 0.02%/0.005% phase 3 topline efficacy results. https://www.businesswire.com/news/home/20170524006043/en/Aerie-Pharmaceuticals-Reports-Positive-RoclatanTM-netarsudillatanoprost-ophthalmic

  36. Bacharach, J., Khouri, A.S., Heah, T., Kopczynski C, Lewis R (2017) A double-masked, randomized, multi-center, active-controlled, parallel group, 6-month study assessing the ocular hypotensive efficacy and safety of netarsudil ophthalmic solution, 0.02% QD compared to timolol maleate ophthalmic solution, 0.5% BID in patie. Am Acad Optom Abst E351:(Oct 11–14, Chicago).

  37. Lewis R a, Levy B, Ramirez N, C Kopczynski C, Usner DW, Novack GD (2015) Fixed-dose combination of AR-13324 and latanoprost: a double-masked, 28-day, randomised, controlled study in patients with open-angle glaucoma or ocular hypertension. Br J Ophthalmol Bjophthalmol 2015:306778.

  38. Aerie Pharmaceuticals Inc (2016) RoclatanTM mercury 2 phase 3 topline results. http://investors.aeriepharma.com/static-files/fb9a0c3f-7255-4b50-97b2-450a2ba5d139.

  39. Williams RD, Novack GD, van Haarlem T, Kopczynski C. Ocular hypotensive effect of the Rho kinase inhibitor AR-12286 in patients with glaucoma and ocular hypertension. Am J Ophthalmol. 2011;152:834-41.e1.

    Article  Google Scholar 

  40. Inoue T, Tanihara H, Tokushige H, Araie M. Efficacy and safety of SNJ-1656 in primary open-angle glaucoma or ocular hypertension. Acta Ophthalmol. 2015;93:e393–5.

    Article  Google Scholar 

  41. Sagawa H, Terasaki H, Nakamura M, Ichikawa M, Yata T, Tokita Y, Watanabe M. A novel ROCK inhibitor, Y-39983, promotes regeneration of crushed axons of retinal ganglion cells into the optic nerve of adult cats. Exp Neurol. 2007;205:230–40.

    Article  CAS  Google Scholar 

  42. Phulke S, Kaushik S, Kaur S, Pandav SS. Steroid-induced Glaucoma: an avoidable irreversible blindness. J Curr glaucoma Pract. 2017;11:67–72.

    Article  Google Scholar 

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Correspondence to Alan L. Robin.

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Dr. Alan Robin serves as Executive Vice President of the American Glaucoma Society. Dr. Emily Schehlein has no conflicts of interest that are directly relevant to the content of this article.

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No sources of funding were used to conduct this study or prepare this manuscript.

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Schehlein, E.M., Robin, A.L. Rho-Associated Kinase Inhibitors: Evolving Strategies in Glaucoma Treatment. Drugs 79, 1031–1036 (2019). https://doi.org/10.1007/s40265-019-01130-z

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