Evaluation of the effects of preconditioned human stem cells plus a scaffold and photobiomodulation administration on stereological parameters and gene expression levels in a critical size bone defect in rats

Armin Khosravipour, Abdollah Amini, Reza Masteri Farahani, Atarodalsadat Mostafavinia, Mehrdad Asgari, Fatemehalsadat Rezaei, Heidi Abrahamse, Sufan Chien, Mohammad Bayat

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

We assessed the impact of photobiomodulation (PBM) plus adipose-derived stem cells (ASCs) during the anabolic and catabolic stages of bone healing in a rat model of a critical size femoral defect (CSFD) that was filled with a decellularized bone matrix (DBM). Stereological analysis and gene expression levels of bone morphogenetic protein 4 (BMP4), Runt-related transcription factor 2 (RUNX2), and stromal cell-derived factor 1 (SDF1) were determined. There were six groups of rats. Group 1 was the untreated control or DBM. Study groups 2–6 were treated as follows: ASC (ASC transplanted into DBM, then implanted in the CSFD); PBM (CSFD treated with PBM); irradiated ASC (iASC) (ASCs preconditioned with PBM, then transplanted into DBM, and implanted in the CSFD); ASC + PBM (ASCs transplanted into DBM, then implanted in the CSFD, followed by PBM administration); and iASC + PBM (the same as iASC, except CSFDs were exposed to PBM). At the anabolic step, all treatment groups had significantly increased trabecular bone volume (TBV) (24.22%) and osteoblasts (83.2%) compared to the control group (all, p =.000). However, TBV in group iASC + PBM groups were superior to the other groups (97.48% for osteoblast and 58.8% for trabecular bone volume) (all, p =.000). The numbers of osteocytes in ASC (78.2%) and iASC + PBM (30%) groups were remarkably higher compared to group control (both, p =.000). There were significantly higher SDF (1.5-fold), RUNX2 (1.3-fold), and BMP4 (1.9-fold) mRNA levels in the iASC + PBM group compared to the control and some of the treatment groups. At the catabolic step of bone healing, TBV increased significantly in PBM (30.77%), ASC + PBM (32.27%), and iASC + PBM (35.93%) groups compared to the control group (all, p =.000). There were significantly more osteoblasts and osteocytes in ASC (71.7%, 62.02%) (p =.002, p =.000); PBM (82.54%, 156%), iASC (179%, 23%), and ASC + PBM (108%, 110%) (all, p =.000), and iASC + PBM (79%, 100.6%) (p =.001, p =.000) groups compared to control group. ASC preconditioned with PBM in vitro plus PBM in vivo significantly increased stereological parameters and SDF1, RUNX2, and BMP4 mRNA expressions during bone healing in a CSFD model in rats.

Original languageEnglish
Pages (from-to)2457-2470
Number of pages14
JournalLasers in Medical Science
Volume37
Issue number5
DOIs
Publication statusPublished - Jul 2022

Keywords

  • Critical size bone defect
  • Photobiomodulation
  • Preconditioned human adipose-derived stem cell
  • Rats
  • Scaffold
  • Stereology
  • mRNA gene expression

ASJC Scopus subject areas

  • Surgery
  • Dermatology

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