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Updated: Dec 22, 2025

Cell Population Analyses During Skin Carcinogenesis
06:53

Cell Population Analyses During Skin Carcinogenesis

Published on: August 21, 2013

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Noncalcemic Vitamin D Hydroxyderivatives Inhibit Human Oral Squamous Cell Carcinoma and Down-regulate Hedgehog and

Allen S W Oak1, Georgeta Bocheva2, Tae-Kang Kim1

  • 1Department of Dermatology, University of Alabama at Birmingham, Birmingham, AL, U.S.A.

Anticancer Research
|May 6, 2020
PubMed
Abstract

Insights

Noncalcemic vitamin D derivatives, 20(OH)D3 and 1,20(OH)2D3, show significant antitumor activity against oral squamous cell carcinoma (OSCC). These compounds effectively inhibit SHH and WNT/β-catenin pathways, offering a promising new avenue for OSCC treatment.

Area of Science:

  • Endocrinology and Cancer Biology
  • Molecular Oncology
  • Vitamin D Metabolism

Background:

  • The active form of vitamin D, 1,25(OH)2D3, has shown efficacy against oral squamous cell carcinoma (OSCC).
  • Noncalcemic vitamin D hydroxyderivatives, such as 20(OH)D3 and 1,20(OH)2D3, present a potential alternative with similar therapeutic benefits but without hypercalcemia risks.

Purpose of the Study:

  • To compare the antitumor effects of 20(OH)D3 and 1,20(OH)2D3 against OSCC with those of 1,25(OH)2D3.
  • To investigate whether the antitumor effects are mediated by the downregulation of sonic hedgehog (SHH) or WNT/β-catenin signaling pathways.

Main Methods:

  • Cell viability was assessed using MTT assays on CAL-27 OSCC cells.
  • Spheroid formation assays were employed to evaluate tumor growth inhibition.
  • Immunofluorescence and Western blotting were used to analyze the modulation of SHH and WNT/β-catenin signaling pathways.

Main Results:

  • Both 20(OH)D3 and 1,20(OH)2D3 significantly inhibited the proliferation of CAL-27 cells.
  • These vitamin D derivatives demonstrated downregulation of key signaling molecules, including GLI1 (SHH pathway) and β-catenin (WNT pathway), indicating pathway inhibition.
  • The observed antitumor effects were comparable to those induced by 1,25(OH)2D3.

Conclusions:

  • Noncalcemic vitamin D hydroxyderivatives exhibit potent antitumor activity against OSCC, similar to 1,25(OH)2D3.
  • The inhibition of SHH and WNT/β-catenin signaling pathways by these compounds offers a novel therapeutic strategy for OSCC.
  • Further research into these vitamin D derivatives could lead to new targeted treatments for oral squamous cell carcinoma.
Keywords:
1,20-dihydroxyvitamin D320-hydroxyvitamin D3Oral squamous cell carcinomaSHHWNT/β-catenin signalingsonic hedgehog signalingvitamin D

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