Serum cadmium levels in pancreatic cancer patients from the East Nile Delta region of Egypt.
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AuthorsKriegel, Alison M.
Soliman, Amr S.
Hamilton, Stanley R.
Abbruzzese, James L.
Lacey, Michelle R.
Blake, Diane A.
MetadataShow full item record
AbstractThe northeast Nile Delta region exhibits a high incidence of early-onset pancreatic cancer. It is well documented that this region has one of the highest levels of pollution in Egypt. Epidemiologic studies have suggested that cadmium, a prevalent pollutant in the northeast Nile Delta region, plays a role in the development of pancreatic cancer. OBJECTIVE: We aimed to assess serum cadmium levels as markers of exposure in pancreatic cancer patients and noncancer comparison subjects from the same region in Egypt. DESIGN AND PARTICIPANTS: We assessed serum cadmium levels of 31 newly diagnosed pancreatic cancer patients and 52 hospital comparison subjects from Mansoura, Egypt. EVALUATION/MEASUREMENTS: Serum cadmium levels were measured using a novel immunoassay procedure. RESULTS: We found a significant difference between the mean serum cadmium levels in patients versus comparison subjects (mean+/-SD, 11.1+/-7.7 ng/mL vs. 7.1+/-5.0 ng/mL, respectively; p=0.012) but not in age, sex, residence, occupation, or smoking status. The odds ratio (OR) for pancreatic cancer risk was significant for serum cadmium level [OR=1.12; 95% confidence interval (CI), 1.04-1.23; p=0.0089] and farming (OR=3.25; 95% CI, 1.03-11.64; p=0.0475) but not for age, sex, residence, or smoking status. CONCLUSIONS: The results from this pilot study suggest that pancreatic cancer in the East Nile Delta region is significantly associated with high levels of serum cadmium and farming. RELEVANCE TO CLINICAL PRACTICE/PUBLIC HEALTH: Future studies should further investigate the etiologic relationship between cadmium exposure and pancreatic carcinogenesis in cadmium-exposed populations.
CitationEnviron. Health Perspect. 2006, 114 (1):113-119
DescriptionBiomarkers of exposure & effect:: validationBiomarker: serum cadmium levelsExposure/effect represented: cadmiumStudy type (in vitro, animals, humans): humansStudy design (if human): cross-sectionalStudy size (if human): 31 patientsTissue/biological material/sample size: 10ml bloodMethod of analysis:ELISA (ref) Soliman AS, El-Ghawalby N, Ezzat F, Bondy ML, Soultan A, Abdel-Wahab M, et al. 2002. Unusually high rate of youngonset pancreatic cancer in the East Nile Delta region of Egypt. Int J Gastrointes Can 32:143-151.Sensitivity (LOD): 1ng/mlInter-individual variation: the mean cadmium level was 11.1 ± 7.7 ng/mL, whereas in the comparisons the mean ± SD was 7.1 ± 5.0 ng/mLHalf-life: 10-30 yearsDose-response: significant difference in mean serum cadmium levels between the cases and comparisons (p = 0.012). There were statistically higher serum cadmium levels in nonsmoker patients than in non-smoker comparison subjects (10.7 ± 6.9 ng/mL and 7.1 ± 5.3 ng/mL, p = 0.038, in patients and comparisons. KEYWORDS CLASSIFICATION: Adult;Aged;Agriculture;biomarkers of exposure & effect: field studies;blood;Cadmium;Case-Control Studies;epidemiology;etiology;Egypt;Environmental Pollutants;Female;Humans;Male;Middle Aged;Pancreatic Neoplasms;Research;Risk Factors;validation.