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Abstract Title:

Menthol Enhances an Antiproliferative Activity of 1alpha,25-Dihydroxyvitamin D(3) in LNCaP Cells.

Abstract Source:

J Clin Biochem Nutr. 2009 Mar;44(2):125-30. Epub 2009 Feb 28. PMID: 19308266

Abstract Author(s):

Eun-Jung Park, Su-Hwa Kim, Byung-Joo Kim, Sung-Young Kim, Insuk So, Ju-Hong Jeon

Abstract:

1alpha,25-dihydroxyvitamin D(3) [1alpha,25(OH)(2)D(3)], the most active form of vitamin D(3), and its analogues have therapeutic benefits for prostate cancer treatment. However, the development of hypercalcemia is an obstacle to clinical applications of 1alpha,25(OH)(2)D(3) for cancer therapy. In this study, we provide evidence that menthol, a key component of peppermint oil, increases an anti-proliferation activity of 1alpha,25(OH)(2)D(3) in LNCaP prostate cancer cells. We found that menthol per se does not exhibit antiproliferative activity, but it is able to enhance 1alpha,25(OH)(2)D(3)-mediated growth inhibition in LNCaP cells. Fluorometric assays using Fura-2 showed that 1alpha,25(OH)(2)D(3) does not induce acute Ca(2+) response, whereas menthol evokes an increase in [Ca(2+)](i), which suggests that cross-talks of menthol-induced Ca(2+) signaling with 1alpha,25(OH)(2)D(3)-mediated growth inhibition pathways. In addition, Western blot analysis revealed that 1alpha,25(OH)(2)D(3) and menthol cooperatively modulate the expression of bcl-2 and p21 which provides the insight into the molecular mechanisms underlying the enhanced 1alpha,25(OH)(2)D(3)-mediated growth inhibition by menthol. Thus, our findings suggest that menthol may be a useful natural compound to enhance therapeutic effects of 1alpha,25(OH)(2)D(3).

Study Type : In Vitro Study

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Sayer Ji
Founder of GreenMedInfo.com

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