TY - JOUR
T1 - Inhibition of Noncanonical Murine Double Minute 2 Homolog Abrogates Ocular Inflammation through NF-κB Suppression
AU - Fan, Yan
AU - Zhang, Wei
AU - Ni, Aiguo
AU - Mahato, Biraj
AU - Chavala, Sai H.
N1 - Publisher Copyright:
© 2018 American Society for Investigative Pathology
PY - 2018/9
Y1 - 2018/9
N2 - Uveitis is estimated to account for 10% of all cases of blindness in the United States, including 30,000 new cases of legal blindness each year. Intraocular and oral corticosteroids are the effective mainstay treatment, but they carry the risk of serious long-term ocular and systemic morbidity. New noncorticosteroid therapies with a favorable side effect profile are necessary for the treatment of chronic uveitis, given the paucity of existing treatment choices. We have previously demonstrated that Nutlin-3, a small-molecule inhibitor of murine double minute 2 (MDM2) homolog, suppresses pathologic retinal angiogenesis through a p53-dependent mechanism, but the noncanonical p53-independent functions have not been adequately elucidated. Herein, we demonstrate an unanticipated function of MDM2 inhibition, where Nutlin-3 potently abrogates lipopolysaccharide-induced ocular inflammation. Furthermore, we identified a mechanism by which transcription and translation of NF-κB is mediated by MDM2, independent of p53, in ocular inflammation. Small-molecule MDM2 inhibition is a novel noncorticosteroid strategy for inhibiting ocular inflammation, which may potentially benefit patients with chronic uveitis.
AB - Uveitis is estimated to account for 10% of all cases of blindness in the United States, including 30,000 new cases of legal blindness each year. Intraocular and oral corticosteroids are the effective mainstay treatment, but they carry the risk of serious long-term ocular and systemic morbidity. New noncorticosteroid therapies with a favorable side effect profile are necessary for the treatment of chronic uveitis, given the paucity of existing treatment choices. We have previously demonstrated that Nutlin-3, a small-molecule inhibitor of murine double minute 2 (MDM2) homolog, suppresses pathologic retinal angiogenesis through a p53-dependent mechanism, but the noncanonical p53-independent functions have not been adequately elucidated. Herein, we demonstrate an unanticipated function of MDM2 inhibition, where Nutlin-3 potently abrogates lipopolysaccharide-induced ocular inflammation. Furthermore, we identified a mechanism by which transcription and translation of NF-κB is mediated by MDM2, independent of p53, in ocular inflammation. Small-molecule MDM2 inhibition is a novel noncorticosteroid strategy for inhibiting ocular inflammation, which may potentially benefit patients with chronic uveitis.
UR - http://www.scopus.com/inward/record.url?scp=85051399398&partnerID=8YFLogxK
U2 - 10.1016/j.ajpath.2018.05.017
DO - 10.1016/j.ajpath.2018.05.017
M3 - Article
C2 - 30126549
AN - SCOPUS:85051399398
SN - 0002-9440
VL - 188
SP - 2087
EP - 2096
JO - American Journal of Pathology
JF - American Journal of Pathology
IS - 9
ER -