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Updated: Apr 19, 2026
An Adipocyte Cell Culture Model to Study the Impact of Protein and Micro-RNA Modulation on Adipocyte Function
Published on: May 4, 2021
MiR-540 as a novel adipogenic inhibitor impairs adipogenesis via suppression of PPARγ
Lin Chen1, Yuanwei Chen, Sheng Zhang
1State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, P. R. China; Department of Oral and Maxillofacial Surgery, The Second Xiangya Hospital, Central South University, Changsha, 410011, P. R. China.
Abstract:
A better understanding of the molecular mechanisms in adipogenesis may provide new insights into adipose tissue-related diseases. Recently, microRNAs (miRNAs) have emerged as a class of epigenetic regulators of stem cell differentiation. In this study, we found that miR-540 was an essential negative regulator of adipogenic differentiation in adipose tissue-derived stromal cells (ADSCs). Lentivirus-mediated overexpression of miR-540 resulted in blockade of the expression of C/EBP-α and PPARγ, the two master transcription factors of adipogenesis, and deficient lipid accumulation, whereas inhibition of miR-540 promoted these processes. Target gene reporter assays showed that miR-540 directly targeted the 3'-untranslated region (3'UTR) of PPARγ, resulting in a decrease of PPARγ protein expression. Collectively, these data suggest that miR-540 represents a new adipogenic inhibitor by, at least in part, targeting PPARγ.
Insights
MicroRNAs regulate fat cell differentiation. This study identifies miR-540 as a key inhibitor of adipogenesis in adipose tissue-derived stromal cells by targeting PPARγ, offering insights into metabolic diseases.
Area of Science:
- Molecular Biology
- Epigenetics
- Cell Biology
Background:
- Adipogenesis, the process of fat cell formation, is crucial for understanding adipose tissue-related diseases.
- MicroRNAs (miRNAs) are emerging as significant epigenetic regulators in stem cell differentiation.
- Identifying novel regulators of adipogenesis is key to developing therapeutic strategies for metabolic disorders.
Purpose of the Study:
- To investigate the role of miR-540 in the regulation of adipogenic differentiation.
- To elucidate the molecular mechanisms by which miR-540 influences adipogenesis.
- To determine if miR-540 can be targeted as an adipogenic inhibitor.
Main Methods:
- Overexpression and inhibition of miR-540 using lentiviral vectors in adipose tissue-derived stromal cells (ADSCs).
- Analysis of key adipogenic transcription factors, including C/EBP-α and PPARγ.
- Assessment of lipid accumulation via biochemical assays.
- Target gene validation using 3'-untranslated region (3'UTR) reporter assays.
Main Results:
- Overexpression of miR-540 blocked adipogenesis, reducing C/EBP-α and PPARγ expression and lipid accumulation in ADSCs.
- Inhibition of miR-540 promoted adipogenic differentiation.
- miR-540 was confirmed to directly target the 3'UTR of PPARγ, leading to decreased PPARγ protein levels.
Conclusions:
- miR-540 acts as a critical negative regulator of adipogenesis in ADSCs.
- The mechanism involves direct targeting of PPARγ, a master regulator of adipogenesis.
- miR-540 represents a potential therapeutic target for modulating adipose tissue function and related diseases.
