Serum procollagen III peptide concentration in iron overload

Area of Science:

• Hepatology
• Biochemistry
• Medical Diagnostics

Background:

• Severe iron overload can lead to hepatic fibrosis and liver damage.
• Histological examination of liver biopsies for monitoring fibrogenic activity has ethical and safety concerns.
• Serum procollagen type III peptide (S-PIIINP) is a known marker for hepatic fibrosis unrelated to iron overload.

Purpose of the Study:

• To evaluate the utility of S-PIIINP as a marker for fibrogenic activity in patients with iron overload.
• To investigate the correlation between S-PIIINP levels and the extent of iron overload.
• To assess the potential of S-PIIINP for monitoring fibrotic processes during iron depletion therapy.

Main Methods:

• Studied 18 patients with hereditary haemochromatosis and 14 with transfusional iron overload.
• Measured serum concentrations of S-PIIINP and S-ferritin.
• Monitored S-PIIINP and serum aminotransferase levels during iron depletion in 6 patients.

Main Results:

• A strong positive correlation was observed between S-ferritin and S-PIIINP levels (r = 0.73, p < 0.0001).
• In patients undergoing iron depletion, serum aminotransferase normalized before S-PIIINP.
• Findings suggest iron excess may directly stimulate fibrogenesis.

Conclusions:

• S-PIIINP shows potential as a non-invasive biomarker for fibrogenic activity in iron overload conditions.
• Serial S-PIIINP measurements could be useful for monitoring the fibrotic process during treatment.
• This marker may help differentiate direct fibrogenesis from hepatocellular injury secondary to iron excess.