Rosiglitazone ameliorates senescence-like phenotypes in a cellular photoaging model.

Abstract

BACKGROUND:

Rosiglitazone (RO), a second-generation thiazolidinedione used mainly in the treatment of non-insulin-dependent diabetes mellitus, has been discovered to be a high-affinity ligand for peroxisome proliferator-activated receptor-γ (PPAR-γ). Several studies have revealed that PPAR-γ is also involved in the regulation of oxidative stress and chronic inflammation associated with aging process in vivo as well as with cellular senescence in vitro. We sought to investigate whether RO pretreatment will counteract the photoaging process using a well-established cellular photoaging model.

METHODS:

Murine dermal fibroblasts (MDFs) were cultured in the absence or presence of RO for 48h, followed by exposure to repeated UVB irradiation. The senescent phenotypes were evaluated including cell viability, senescence-associated β-galactosidase (SA-β-gal) expression, cell morphology, ROS generation, cell cycle, production and degradation of extracellular matrix (ECM), and the potential mechanisms were discussed.

RESULTS:

Pretreatment with RO (40μM) significantly decreased the staining intensity and the percentage of SA-β-gal-positive cells and reserved the elongated cell shape compared with UVB group. The cells pretreated with RO also showed decreased UVB-induced degradation of type I collagen by decreasing MMPs expressions. In addition, we observed counteraction of cell-cycle arrest and repression of UVB-induced p53 and p21 in the presence of RO. We further confirmed a significant decrease in ROS accumulation accompanied by an increase in catalase in RO group.

CONCLUSIONS:

RO, a potent PPAR-γ activator, counteracts senescence-like phenotypes, including long-term growth arrest, flattened morphology, degradation of ECM and SA-β-gal-positive staining in MDFs by inhibiting the expression of MMPs and increasing the synthesis of catalase when administered to repeated UVB irradiation. The novel application of RO may lead to innovative and effective anti-photoaging therapies.

• Authors: Liang Chen, Bo Bi, Jiping Zeng, Yiqun Zhou, Ping Yang, Yu Guo, Jingjing Zhu, Qingjian Yang, Ningwen Zhu, Tianyi Liu
• Journal: Journal of dermatological science (J Dermatol Sci) Vol. 77 Issue 3 Pg. 173-81 (Mar 2015) ISSN: 1873-569X [Electronic] Netherlands
• PMID: 25703056 (Publication Type: Journal Article)
• Copyright: Copyright © 2015 Japanese Society for Investigative Dermatology. Published by Elsevier Ireland Ltd. All rights reserved.

Chemical References

• Collagen Type I
• Cyclin-Dependent Kinase Inhibitor p21
• Hypoglycemic Agents
• PPAR gamma
• Reactive Oxygen Species
• Thiazolidinediones
• Tumor Suppressor Protein p53
• Rosiglitazone
• Catalase
• beta-Galactosidase
• Matrix Metalloproteinases

Topics

• Aging (drug effects, metabolism, radiation effects)
• Animals
• Catalase (metabolism)
• Cell Cycle Checkpoints (drug effects, radiation effects)
• Cell Survival
• Cells, Cultured
• Collagen Type I (metabolism)
• Cyclin-Dependent Kinase Inhibitor p21 (metabolism)
• Fibroblasts (drug effects, pathology, radiation effects)
• Hypoglycemic Agents (pharmacology)
• Matrix Metalloproteinases (metabolism)
• Mice
• Mice, Inbred C57BL
• Models, Biological
• PPAR gamma (metabolism)
• Phenotype
• Reactive Oxygen Species (metabolism)
• Rosiglitazone
• Skin Aging (drug effects, radiation effects)
• Thiazolidinediones (pharmacology)
• Tumor Suppressor Protein p53 (metabolism)
• Ultraviolet Rays
• beta-Galactosidase (metabolism)