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publicado em 26/12/2011 às 13h53:00
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High levels of nickel and selenium reduce risk of pancreatic cancer

Research has also shown that the probability of cancer was 3.5 times higher in patients with high levels of arsenic and cadmium

 
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According to a study published online in Gut, high levels of the trace elements nickel and selenium in the body may lower the risk of developing the most common type of pancreatic cancer, whilst high levels of arsenic, lead, and cadmium could increase the risk of developing the disease.

Knowledge on the aetiology of exocrine pancreatic cancer (EPC) is scant. The best established risk factor for EPC is tobacco smoking. Among other carcinogens, tobacco contains cadmium, a metal previously associated with an increased risk of EPC. This study evaluated the association between concentrations of trace elements in toenails and EPC risk.

The study included 118 EPC cases and 399 hospital controls from eastern Spain. Levels of 12 trace elements were determined in toenail samples by inductively coupled plasma mass spectrometry. OR and 95% CI, adjusted for potential confounders, were calculated using logistic regression.

Significantly increased risks of EPC were observed among subjects whose concentrations of cadmium (OR 3.58, 95% CI 1.86 to 6.88; ptrend=5×10?6), arsenic (OR 2.02, 95% CI 1.08 to 3.78; ptrend=0.009) and lead (OR 6.26, 95% CI 2.71 to 14.47; ptrend=3×10?5) were in the highest quartile. High concentrations of selenium (OR 0.05, 95% CI 0.02 to 0.15; ptrend=8×10?11) and nickel (OR 0.27, 95% CI 0.12 to 0.59; ptrend=2×10?4) were inversely associated with the risk of EPC.

Novel associations are reported of lead, nickel and selenium toenail concentrations with pancreas cancer risk. Furthermore, the results confirm previous associations with cadmium and arsenic. These novel findings, if replicated in independent studies, would point to an important role of trace elements in pancreatic carcinogenesis.

Source: Isaude.net
   Palavras-chave:   Pancreatic cancer    Trace elements    Nickel    Selenium    Spanish National Cancer Research Centre    Gut   
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Pancreatic cancer    trace elements    nickel    selenium    Spanish National Cancer Research Centre    Gut   
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