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Nicotine alters MicroRNA expression and hinders human adult stem cell regenerative potential

Tsz Kin Ng1, Carlos M Carballosa, Daniel Pelaez

  • 1Geriatric Research, Education and Clinical Center, Miami Veterans Affairs Medical Center, Miami, Florida 33125, USA.

Stem Cells and Development
|October 4, 2012
PubMed

Insights

Nicotine, found in cigarette smoke, impairs adult stem cell functions like proliferation and healing. This research explains how nicotine hinders stem cell potential, impacting regenerative medicine and wound healing.

Area of Science:

  • Regenerative Medicine
  • Stem Cell Biology
  • Toxicology

Background:

  • Adult stem cells are crucial for tissue repair and regenerative medicine.
  • Cigarette smoking is known to impede wound healing and stem cell function.
  • Nicotine is a primary toxicant in cigarette smoke.

Purpose of the Study:

  • To investigate the impact of nicotine on the regenerative capabilities of human mesenchymal stem cells (MSC) and periodontal ligament-derived stem cells (PDLSC).
  • To elucidate the mechanisms by which nicotine affects stem cell proliferation, migration, and differentiation.

Main Methods:

  • Treatment of MSC and PDLSC with 1.0 μM nicotine.
  • Assessment of cell proliferation and locomotion.
  • Analysis of osteogenic differentiation via gene expression (RUNX2, ALPL, BGLAP, COL1A1, COL1A2), calcium deposition, and alkaline phosphatase activity.
  • MicroRNA (miRNA) profiling of nicotine-treated PDLSC.

Main Results:

  • Nicotine significantly reduced the proliferation and locomotion of both MSC and PDLSC.
  • Osteogenic differentiation potential was diminished by nicotine exposure.
  • Alterations in the miRNA profile of nicotine-treated PDLSC were observed, suggesting a role for miRNAs in nicotine's effects.

Conclusions:

  • Nicotine negatively affects critical stem cell functions, including proliferation, migration, and osteogenic differentiation.
  • The findings provide mechanistic insights into why cigarette smoking delays wound healing and hinders regenerative medicine.
  • MicroRNAs may mediate some of the detrimental effects of nicotine on stem cells.

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