INSULIN ACTIVITY ON DENTAL PULP STEM CELL DIFFERENTIATION: AN IN VITRO STUDY

Area of Science:

• Stem Cell Biology
• Endocrinology
• Regenerative Medicine

Background:

• Insulin is a key hormone regulating osteoblast proliferation and differentiation.
• Dental pulp stem cells (DPSCs) possess self-expansion and osteogenic differentiation capabilities.
• In vitro autologous bone tissue production using DPSCs is a promising area.

Purpose of the Study:

• To investigate insulin's effect on DPSC differentiation into osteoblasts.
• To determine if insulin influences bone tissue formation from DPSCs.
• To analyze insulin's impact on specific gene expression during DPSC osteogenesis.

Main Methods:

• Dental germ pulp was harvested from healthy subjects' third molars.
• DPSCs were isolated and cultured.
• Cells were treated with insulin (100 ng/μl) for 24 and 48 hours.
• Gene expression analysis (RT-qPCR) was performed to compare treated and control groups.

Main Results:

• Insulin treatment modulated the expression of Bone Morphogenetic Proteins (BMPs) and their receptors.
• Significant upregulation of BMP3, BMP4, and BMPR1A observed after 24 hours.
• BMP1 was overexpressed after 48 hours; BMP4, BMP7, BMP5, and TGFBR2 showed differential regulation.
• Insulin demonstrated a clear influence on DPSC proliferation and osteogenic differentiation.

Conclusions:

• Insulin plays a significant role in promoting DPSC proliferation and differentiation into osteoblasts.
• The study highlights insulin's potential to modulate key genes involved in osteogenesis.
• Further research is warranted to explore insulin-mediated pathways for bone tissue engineering.