Lasers in Medical Science

, Volume 30, Issue 1, pp 217–223 | Cite as

Effects of low level laser therapy on attachment, proliferation, and gene expression of VEGF and VEGF receptor 2 of adipocyte-derived mesenchymal stem cells cultivated under nutritional deficiency

  • Tabata Santos de Oliveira
  • Andrey Jorge SerraEmail author
  • Martha Trindade Manchini
  • Vinicius Bassaneze
  • José Eduardo Krieger
  • Paulo de Tarso Camillo de Carvalho
  • Daniela Espindola Antunes
  • Danilo Sales Bocalini
  • Paulo José Ferreira Tucci
  • José Antônio SilvaJr
Original Article


Low-level laser therapy (LLLT) has been shown to increase the proliferation of several cell types. We evaluated the effects of LLLT on adhesion, proliferation, and gene expression of vascular endothelial growth factor (VEGF) and type 2 receptor of VEGF (VEGFR2) at mesenchymal stem cells (MSCs) from human (hMSCs) and rat (rMSCs) adipose tissues on nutritional deficiencies. A dose-response curve was performed with cells treated with laser Ga-Al-As (660 nm, 30 mW) at energy of 0.7 to 9 J. Cell adhesion and proliferation were quantified 20, 40, and 60 min after LLLT and 24, 72, and 120 h after cultivation. Gene expression was verified by RT-PCR after 2 h of LLLT. A minor nutritional support caused a significant decrease in proliferation and adhesion of hMSCs and rMSCs. However, at the lowest LLLT dose (0.7 J), we observed a higher proliferation in hMSCs at standard condition shortly after irradiation (24 h). Adhesion was higher in hMSCs cultivated in controlled conditions at higher LLLT doses (3 and 9 J), and rMSCs show a reduction in the adhesion on 1.5 to 9 J. On nutritional deprivation, a 9 J dose was shown to reduce proliferation with 24 h and adhesion to all culture times in rMSCs. VEGF and VEGFR2 were increased after LLLT in both cell types. However, hMSCs under nutritional deprivation showed higher expression of VEGF and its receptor after irradiation with other laser doses. In conclusion, LLLT on human and rat MSCs might upregulate VEGF messenger RNA (mRNA) expression and modulate cell adhesion and proliferation distinctively.


Cell adhesion Cell proliferation Low-level laser therapy Mesenchymal stem cell VEGF 


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Copyright information

© Springer-Verlag London 2014

Authors and Affiliations

  • Tabata Santos de Oliveira
    • 1
  • Andrey Jorge Serra
    • 1
    Email author
  • Martha Trindade Manchini
    • 1
  • Vinicius Bassaneze
    • 2
  • José Eduardo Krieger
    • 2
  • Paulo de Tarso Camillo de Carvalho
    • 1
  • Daniela Espindola Antunes
    • 3
  • Danilo Sales Bocalini
    • 4
  • Paulo José Ferreira Tucci
    • 3
  • José Antônio SilvaJr
    • 1
  1. 1.Nove de Julho UniversitySão PauloBrazil
  2. 2.São Paulo University–InCorSão PauloBrazil
  3. 3.Federal University of São PauloSão PauloBrazil
  4. 4.São Judas Tadeu UniversitySão PauloBrazil

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