Cadmium Toxicity Effects on Histone Modifiers, Enzyme Activity and Adipokines in Human Adipose Tissue Cells

Area of Science:

• Environmental toxicology
• Metabolic disease research
• Epigenetics

Background:

• Environmental cadmium (Cd) exposure is linked to obesity, metabolic dysfunction, and inflammation.
• Adipose tissue (AT) accumulates heavy metals and is targeted by Cd toxicity.
• Mechanisms of Cd disruption in adipocytes, especially via epigenetics, are poorly understood.

Purpose of the Study:

• Investigate Cd effects on epigenetic regulators, antioxidant enzymes, inflammatory mediators, and adipogenic programming in human adipose-derived stromal/stem cells (hASCs) and differentiated adipocytes.

Main Methods:

• Exposure of hASCs and differentiated adipocytes to varying Cd concentrations.
• Analysis of histone modifiers (H3K27), redox balance, and inflammatory mediators.
• Assessment of adipogenic differentiation and lipid accumulation.

Main Results:

• Cd exposure altered histone modifiers (H3K27) and disrupted redox balance concentration-dependently.
• Impaired adipogenic differentiation and lipid accumulation were observed.
• Modulated inflammatory and adipokine responses varied by differentiation stage and Cd concentration.

Conclusions:

• Cd compromises adipose cell homeostasis through epigenetic dysregulation, oxidative stress, and altered signaling.
• Accumulation of Cd in adipose tissue may have long-term metabolic consequences.
• Cd exposure poses risks for metabolic disorders like type 2 diabetes and cardiovascular diseases.