کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2585839 1130883 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Skin tumor promotion by argemone oil/alkaloid in mice: Evidence for enhanced cell proliferation, ornithine decarboxylase, cyclooxygenase-2 and activation of MAPK/NF-κB pathway
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش تغذیه
پیش نمایش صفحه اول مقاله
Skin tumor promotion by argemone oil/alkaloid in mice: Evidence for enhanced cell proliferation, ornithine decarboxylase, cyclooxygenase-2 and activation of MAPK/NF-κB pathway
چکیده انگلیسی

Consumption of argemone oil (AO) contaminated edible oil causes “Epidemic Dropsy”. Previously, we have shown that AO and isolated sanguinarine possess genotoxicity and skin tumor initiating activity. Here, we evaluate tumor-promoting potential of AO/sanguinarine alkaloid and investigate the molecular mechanisms involved therein. Single topical application of AO (50–400 μl/mouse) or sanguinarine alkaloid (1.5–12.0 μmol/mouse) afforded significant increase in (i) ornithine decarboxylase (ODC) activity, (ii) uptake of [3H]-thymidine in DNA, (iii) cyclooxygenase-2 (COX-2), proliferating cell nuclear antigen (PCNA) and ODC protein expressions, (iv) phosphorylation of extracellular signal-regulated kinase (ERK)1/2, c-jun-N-terminal kinase (JNK)1/2 and p38 mitogen-activated protein (MAP) kinases, (v) increased NF-κB activation and (vi) no significant increase in dark basal keratinocytes. Subsequently, when AO and sanguinarine alkaloid was tested either as complete or stage I or stage II tumor promoter in 7, 12-dimethyl benz(a)anthracene (DMBA)-initiated mice, there was enhanced tumor incidence, tumor body burden and higher % of mice with tumors, when AO (0.1 ml) or isolated sanguinarine (1.5 μmol) was tested as stage II tumor promoter. However, no tumors were found when AO or sanguinarine alkaloid was tested either as complete or stage I tumor promoter. These results indicate that AO/ sanguinarine alkaloid possesses tumor-promoting potential at stage II level involving MAPK/NF-κB pathway.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food and Chemical Toxicology - Volume 48, Issue 1, January 2010, Pages 132–138
نویسندگان
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