The Impact of Green Light-Emitting Diode Irradiation on Hepatic Differentiation of Human Adipose-Derived Mesenchymal Cells

The Impact of Green Light-Emitting Diode Irradiation on Hepatic Differentiation of Human Adipose-Derived Mesenchymal Cells


In recent years, stem cell therapy has emerged as a promising approach for the treatment of various diseases and tissue regeneration. Among different types of stem cells, adipose-derived mesenchymal cells (ADMSCs) have gained significant attention due to their abundance, easy accessibility, and potential to differentiate into multiple cell lineages. One area of particular interest is the hepatic differentiation of ADMSCs, as it holds great potential for liver regeneration and treatment of liver diseases. In this article, we will explore the impact of green light-emitting diode (LED) irradiation on the hepatic differentiation of human ADMSCs.


Hepatic differentiation involves the transformation of stem cells into hepatocyte-like cells, which possess similar characteristics and functions to mature hepatocytes. This process is regulated by various factors, including growth factors, cytokines, and physical stimuli. Light therapy, specifically LED irradiation, has gained attention as a non-invasive and safe method to enhance cellular functions and promote tissue regeneration.

Green LED Irradiation:

Green LED irradiation refers to the exposure of cells or tissues to green light with a specific wavelength range. Green light-emitting diodes emit light in the range of 520-570 nm. This wavelength has been shown to have beneficial effects on cellular activities, including proliferation, differentiation, and metabolism.

Impact on Hepatic Differentiation:

Several studies have investigated the impact of green LED irradiation on the hepatic differentiation of ADMSCs. These studies have demonstrated that green LED irradiation can enhance the efficiency and quality of hepatic differentiation.

1. Enhanced Differentiation Efficiency:

Green LED irradiation has been shown to increase the efficiency of hepatic differentiation of ADMSCs. It promotes the expression of hepatic-specific markers, such as albumin, alpha-fetoprotein, and cytokeratin 18. These markers are essential for the identification and functionality of hepatocyte-like cells.

2. Improved Functional Characteristics:

Green LED irradiation also improves the functional characteristics of differentiated ADMSCs. It enhances the production of liver-specific proteins, such as albumin and urea. Additionally, it promotes glycogen storage and cytochrome P450 enzyme activity, which are crucial for hepatic metabolism and detoxification.

3. Activation of Signaling Pathways:

Green LED irradiation activates various signaling pathways involved in hepatic differentiation. It upregulates the expression of key transcription factors, such as hepatocyte nuclear factor 4 alpha (HNF4α) and CCAAT/enhancer-binding protein alpha (C/EBPα). These transcription factors play a crucial role in regulating hepatic gene expression and function.

Mechanisms of Action:

The exact mechanisms underlying the impact of green LED irradiation on hepatic differentiation are not fully understood. However, several hypotheses have been proposed. It is believed that green LED irradiation enhances cellular energy metabolism by increasing ATP production and mitochondrial activity. This, in turn, promotes the differentiation of ADMSCs into hepatocyte-like cells. Additionally, green LED irradiation may activate specific intracellular signaling pathways, such as the Wnt/β-catenin pathway, which is known to regulate hepatic differentiation.


Green LED irradiation has shown promising results in enhancing the hepatic differentiation of human ADMSCs. Its ability to improve differentiation efficiency and functional characteristics makes it a potential therapeutic approach for liver regeneration and treatment of liver diseases. Further research is needed to elucidate the underlying mechanisms and optimize the parameters of green LED irradiation for maximum efficacy. Nonetheless, this non-invasive and safe method holds great promise in the field of stem cell therapy and regenerative medicine.