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PPAR? regulates meibocyte differentiation and lipid synthesis of cultured human meibomian gland epithelial cells (hMGEC).


ABSTRACT: PURPOSE:To evaluate the role of PPAR? in regulating meibocyte differentiation and lipid synthesis in a human meibomian gland epithelial cell line (hMGEC). METHODS:HMGEC were exposed to the PPAR? agonist, Rosiglitazone, from 10-50??M. Cultures were also exposed to specific PPAR? antagonist, T0070907, to block PPAR? receptor signaling. Cells were then stained with Ki-67 and LipidTox to determine the effects on cell cycling and lipid synthesis, respectively. Expression of meibocyte differentiation related proteins, ADFP, PPAR?, ELOVL4, and FABP4, were evaluated by quantitative PCR and western blotting. A human corneal epithelial cell line (hTCEpi) was used as a control. RESULT:Rosiglitazone significantly decreased Ki-67 staining within 2 days in a dose-dependent manner (P?=?0.003) and increased lipid accumulation in hMGEC in a dose dependent manner. T0070907 suppressed both lipid droplet synthesis and cell cycle exit. Rosiglitazone significantly upregulated expression of ADFP, PPAR?, ELOVL4, and FABP4 by 9.6, 2.7, 2.6, and 3.3 fold on average (all P?

SUBMITTER: Kim SW 

PROVIDER: S-EPMC6434942 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature

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PPARγ regulates meibocyte differentiation and lipid synthesis of cultured human meibomian gland epithelial cells (hMGEC).

Kim Sun Woong SW   Xie Yilu Y   Nguyen Paul Q PQ   Bui Vickie T VT   Huynh Kelly K   Kang Jonathan S JS   Brown Donald J DJ   Jester James V JV  

The ocular surface 20180707 4


<h4>Purpose</h4>To evaluate the role of PPARγ in regulating meibocyte differentiation and lipid synthesis in a human meibomian gland epithelial cell line (hMGEC).<h4>Methods</h4>HMGEC were exposed to the PPARγ agonist, Rosiglitazone, from 10-50 μM. Cultures were also exposed to specific PPARγ antagonist, T0070907, to block PPARγ receptor signaling. Cells were then stained with Ki-67 and LipidTox to determine the effects on cell cycling and lipid synthesis, respectively. Expression of meibocyte d  ...[more]

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