[Liver changes in protein malnutrition. An experimental study in rats]

Area of Science:

• Hepatology
• Nutritional Science
• Toxicology

Background:

• Protein malnutrition is a known cause of liver steatosis and fibrosis.
• Ito cells play a role in liver fibrogenesis.
• Trace elements like copper, iron, manganese, and zinc are involved in collagen synthesis and liver enzyme activity.

Purpose of the Study:

• To investigate the effects of a hypoproteic diet on liver histomorphometry and trace element content in Wistar rats.
• To compare these parameters between rats fed a low-protein diet and control rats.

Main Methods:

• 12 Wistar rats were fed a 6% protein isocaloric diet for two months.
• Histomorphometric parameters (hepatocyte and nucleum area, fat, fibrosis) and liver trace element levels (Fe, Cu, Mn, Zn) were analyzed.
• Results were compared to a control group of 12 rats.

Main Results:

• The experimental group showed a reduced hepatocyte nucleum area and an increased cytoplasm-to-nucleum ratio.
• Pronounced steatosis and slight fibrosis were observed in the low-protein diet group.
• Liver iron content increased significantly, while manganese, zinc, and copper levels decreased significantly.
• No significant difference in Ito cell percentages was found between groups.
• Liver iron levels correlated positively with total fat content.

Conclusions:

• A hypoproteic diet induces significant changes in liver structure and trace element composition in rats.
• These alterations may contribute to the development of liver steatosis and fibrosis.
• The study highlights the complex interplay between protein intake, trace elements, and liver pathology.