Epithelial phenotype restoring drugs suppress macular degeneration phenotypes in an iPSC model

代谢/内分泌;毒理/病理;骨科;神经科学;心血管;病毒/微生物;免疫/炎症;衰老;细胞治疗;肿瘤;生殖生物学
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R Sharma, A George, M Nimmagadda, D Ortolan, BS Karla, Z Qureshy, D Bose, R Dejene, G Liang, Q Wan, J Chang, BS Jha, O Memon, KJ Miyagishim, A Rising, M Lal, E Hanson, R King, MM Campos, M Ferrer, J Amaral, D McGaughey, K Bharti

  • Nature Communications
  • 2021
  • 17.694
  • 12(1):7293.
  • Human
  • Luminex
  • Cell Culture Supernates
  • 药物研发
  • 其它细胞

Abstract

Age-related Macular Degeneration (AMD), a blinding eye disease, is characterized by pathological protein- and lipid-rich drusen deposits underneath the retinal pigment epithelium (RPE) and atrophy of the RPE monolayer in advanced disease stages - leading to photoreceptor cell death and vision loss. Currently, there are no drugs that stop drusen formation or RPE atrophy in AMD. Here we provide an iPSC-RPE AMD model that recapitulates drusen and RPE atrophy. Drusen deposition is dependent on AMD-risk-allele CFH(H/H) and anaphylatoxin triggered alternate complement signaling via the activation of NF-κB and downregulation of autophagy pathways. Through high-throughput screening we identify two drugs, L-745,870, a dopamine receptor antagonist, and aminocaproic acid, a protease inhibitor that reduce drusen deposits and restore RPE epithelial phenotype in anaphylatoxin challenged iPSC-RPE with or without the CFH(H/H) genotype. This comprehensive iPSC-RPE model replicates key AMD phenotypes, provides molecular insight into the role of CFH(H/H) risk-allele in AMD, and discovers two candidate drugs to treat AMD.
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