Trace element concentration in primary liver cancers--a systematic review

Area of Science:

• Hepatology
• Oncology
• Trace Element Research

Background:

• Geographical variations in primary liver cancer incidence exist, with unknown etiological factors.
• Hepatocellular carcinoma (HCC) development is potentially linked to alterations in trace element levels.
• This review synthesizes evidence on the association between trace elements and HCC.

Purpose of the Study:

• To review and summarize existing evidence on the relationship between trace elements and hepatocellular carcinoma (HCC).
• To identify patterns in trace element levels associated with HCC.

Main Methods:

• Comprehensive literature search of MEDLINE, EMBASE, and CENTRAL databases.
• Application of specific inclusion and exclusion criteria for article selection.
• Data extraction using a custom-designed form from selected studies.

Main Results:

• Twelve studies, involving 646 patients, met the inclusion criteria, analyzing iron, copper, zinc, and selenium.
• Despite heterogeneity precluding meta-analysis, a discernible pattern in trace element distribution was observed.
• Iron and zinc levels were found to be lower in HCC tissues compared to surrounding tissues or normal controls.

Conclusions:

• Iron and zinc concentrations are reduced in hepatocellular carcinoma (HCC) tissues.
• Copper content is also lower in HCC tissues compared to surrounding tissues and cirrhotic controls.
• Further investigation into the epidemiological and physiological underpinnings of these trace element alterations is warranted.